open_posix_testsuite/conformace/interfaces: Fix.

Change the main() and main(argc, argv) to main(void).

This fixes a lot of warnings in the latter case.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>

1401 files changed, 1427 insertions, 1427 deletions

diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/1-1.c
index 68360d9f4..92f4b1d9d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/1-1.c
@@ -34,7 +34,7 @@
 
 #define TNAME "aio_cancel/1-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 1024
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/10-1.c
index f5c9a4def..b96a4278b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/10-1.c
@@ -32,7 +32,7 @@
 
 #define TNAME "aio_cancel/10-1.c"
 
-int main()
+int main(void)
 {
 
 	if (sysconf(_SC_ASYNCHRONOUS_IO) < 200112L)
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/2-1.c
index 638a81b9b..97a00bcb9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/2-1.c
@@ -39,7 +39,7 @@
 
 #define TNAME "aio_cancel/2-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 1024
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/2-2.c
index e96dacfe8..d0673192c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/2-2.c
@@ -36,7 +36,7 @@
 
 #define TNAME "aio_cancel/2-2.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/4-1.c
index b1034000e..76a45a125 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/4-1.c
@@ -44,7 +44,7 @@
 #define BUF_NB		128
 #define BUF_SIZE	(1024*1024)
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/5-1.c
index 56729c1a5..ece29ac56 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/5-1.c
@@ -42,7 +42,7 @@
 #define BUF_NB		128
 #define BUF_SIZE	1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/6-1.c
index 786af476c..280ac15b1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/6-1.c
@@ -45,7 +45,7 @@
 #define BUF_NB		128
 #define BUF_SIZE	1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/8-1.c
index c461dde36..2627687fd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/8-1.c
@@ -36,7 +36,7 @@
 
 #define TNAME "aio_cancel/8-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 1024
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/9-1.c
index 50a32d4c5..0e4330828 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_cancel/9-1.c
@@ -33,7 +33,7 @@
 
 #define TNAME "aio_cancel/9-1.c"
 
-int main()
+int main(void)
 {
 
 	if (sysconf(_SC_ASYNCHRONOUS_IO) < 200112L)
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_error/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_error/1-1.c
index 16c8a0a6e..627d814a1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_error/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_error/1-1.c
@@ -34,7 +34,7 @@
 
 #define TNAME "aio_error/1-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_error/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_error/2-1.c
index c4fca08e4..12319dc83 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_error/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_error/2-1.c
@@ -38,7 +38,7 @@
 #define BUF_NB		128
 #define BUF_SIZE	1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_error/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_error/3-1.c
index 858a0fe08..5d5dbe871 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_error/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_error/3-1.c
@@ -34,7 +34,7 @@
 
 #define TNAME "aio_error/3-1.c"
 
-int main()
+int main(void)
 {
 
 	char tmpfname[256];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/12-1.c
index bb0722b05..3bd7b854b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/12-1.c
@@ -21,7 +21,7 @@
 
 #define TNAME "aio_fsync/12-1.c"
 
-int main()
+int main(void)
 {
 	struct aiocb aiocb;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/14-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/14-1.c
index 421f7ae11..ad6216630 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/14-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/14-1.c
@@ -21,7 +21,7 @@
 
 #define TNAME "aio_fsync/14-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/3-1.c
index 6f0098d4c..adda4d998 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/3-1.c
@@ -23,7 +23,7 @@
 
 #define BUF_SIZE 1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	char buf[BUF_SIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/4-1.c
index 8d111e534..a957bf625 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/4-1.c
@@ -22,7 +22,7 @@
 
 #define TNAME "aio_fsync/4-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/5-1.c
index 438a43067..f9995dcf8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/5-1.c
@@ -23,7 +23,7 @@
 
 #define BUF_SIZE 1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	char buf[BUF_SIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-1.c
index db0d11b18..d03dc764c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-1.c
@@ -21,7 +21,7 @@
 
 #define TNAME "aio_fsync/8-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-2.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-2.c
index 0d529fcd0..7215872a2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-2.c
@@ -21,7 +21,7 @@
 
 #define TNAME "aio_fsync/8-2.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-3.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-3.c
index cb73537b0..1126e84ce 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-3.c
@@ -21,7 +21,7 @@
 
 #define TNAME "aio_fsync/8-3.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-4.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-4.c
index 96179e066..e0e83a792 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-4.c
@@ -21,7 +21,7 @@
 
 #define TNAME "aio_fsync/8-4.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/9-1.c
index c4f47875e..f0e7ee235 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/9-1.c
@@ -21,7 +21,7 @@
 
 #define TNAME "aio_fsync/9-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/1-1.c
index 3b1743edb..aa79375d7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/1-1.c
@@ -32,7 +32,7 @@
 
 #define TNAME "aio_read/1-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define WBUF_SIZE 1024
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/10-1.c
index 2b07b8e75..473240b98 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/10-1.c
@@ -35,7 +35,7 @@
 
 #define TNAME "aio_read/10-1.c"
 
-int main()
+int main(void)
 {
 #define BUF_SIZE 111
 	char buf[BUF_SIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/11-1.c
index f22251ac5..1639f4b68 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/11-1.c
@@ -36,7 +36,7 @@
 
 #define TNAME "aio_read/11-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/11-2.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/11-2.c
index 4f238ad45..1cfe95678 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/11-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/11-2.c
@@ -36,7 +36,7 @@
 
 #define TNAME "aio_read/11-2.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/3-1.c
index 0f8fa9792..49fae18a2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/3-1.c
@@ -33,7 +33,7 @@
 
 #define TNAME "aio_read/3-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/3-2.c
index 7086ee88e..06bd7242c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/3-2.c
@@ -33,7 +33,7 @@
 
 #define TNAME "aio_read/3-2.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 1024
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/4-1.c
index aa033ab0d..149cf83fc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/4-1.c
@@ -33,7 +33,7 @@
 
 #define TNAME "aio_read/4-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/5-1.c
index 853c602a7..3f14aeb72 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/5-1.c
@@ -34,7 +34,7 @@
 
 #define TNAME "aio_read/5-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/7-1.c
index 2213799e5..4802b4354 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/7-1.c
@@ -34,7 +34,7 @@
 
 #define TNAME "aio_read/7-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/8-1.c
index ea0538e17..2d082ca23 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/8-1.c
@@ -35,7 +35,7 @@
 
 #define TNAME "aio_read/8-1.c"
 
-int main()
+int main(void)
 {
 	struct aiocb aiocb;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/9-1.c
index 3e1cd0949..1740c7bd4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_read/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_read/9-1.c
@@ -38,7 +38,7 @@
 
 #define NUM_AIOCBS 1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/3-1.c
index ab3d35a05..dfb99f3a3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/3-1.c
@@ -37,7 +37,7 @@
 #define NENT	8
 #define NAIOCB	3
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 1024
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/4-1.c
index bb43df2b4..7cf377d88 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/4-1.c
@@ -54,7 +54,7 @@ static void sigrt2_handler(int signum, siginfo_t *info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/5-1.c
index 8e43e3563..d0d7e4872 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/5-1.c
@@ -22,7 +22,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	if (sysconf(_SC_ASYNCHRONOUS_IO) != 200112L ||
 	    sysconf(_SC_MONOTONIC_CLOCK) < 200112L)
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/9-1.c
index c275fce65..c14480e20 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_suspend/9-1.c
@@ -48,7 +48,7 @@ static void sigrt1_handler(int signum, siginfo_t *info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/1-1.c
index 0c129a688..d196aeb2e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/1-1.c
@@ -36,7 +36,7 @@
 
 #define TNAME "aio_write/1-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/1-2.c
index 6ea5a93c2..4141fca72 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/1-2.c
@@ -37,7 +37,7 @@
 
 #define TNAME "aio_write/1-2.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 1024
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/2-1.c
index 7927f31b4..96b54648c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/2-1.c
@@ -36,7 +36,7 @@
 
 #define TNAME "aio_write/2-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE0 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/3-1.c
index fd06b560a..6b1c91dda 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/3-1.c
@@ -36,7 +36,7 @@
 
 #define TNAME "aio_write/3-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/5-1.c
index 6a245f082..c5607c57f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/5-1.c
@@ -35,7 +35,7 @@
 
 #define TNAME "aio_write/5-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/6-1.c
index 53b5e7b44..b1430d820 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/6-1.c
@@ -36,7 +36,7 @@
 
 #define TNAME "aio_write/6-1.c"
 
-int main()
+int main(void)
 {
 	struct aiocb aiocb;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/7-1.c
index 675f74f90..42160a811 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/7-1.c
@@ -38,7 +38,7 @@
 
 #define NUM_AIOCBS 1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/8-1.c
index 5f6b535f2..c3bbe15fc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/8-1.c
@@ -35,7 +35,7 @@
 
 #define TNAME "aio_write/8-1.c"
 
-int main()
+int main(void)
 {
 #define BUF_SIZE 512
 	char buf[BUF_SIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/8-2.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/8-2.c
index b11cb1d67..7b738d5b0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/8-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/8-2.c
@@ -35,7 +35,7 @@
 
 #define TNAME "aio_write/8-2.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/9-1.c
index e368ce777..37da15020 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/9-1.c
@@ -38,7 +38,7 @@
 
 #define TNAME "aio_write/9-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 111
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/9-2.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/9-2.c
index 6450c779c..19d1d018f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_write/9-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_write/9-2.c
@@ -38,7 +38,7 @@
 
 #define TNAME "aio_write/9-2.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/asctime/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/asctime/1-1.c
index c323291e7..bc3095081 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/asctime/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/asctime/1-1.c
@@ -24,7 +24,7 @@ The asctime() function shall convert the broken-down time in the structure point
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	struct tm time_ptr;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/ctime/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/ctime/1-1.c
index b2508dd58..b3f17b3d9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/ctime/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/ctime/1-1.c
@@ -14,7 +14,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	time_t current_time;
 	char *result;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/difftime/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/difftime/1-1.c
index 59444ffe9..97bf44352 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/difftime/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/difftime/1-1.c
@@ -17,7 +17,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	time_t time1, time0;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/fsync/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/fsync/4-1.c
index 6f75de3bc..65d6e89c9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/fsync/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/fsync/4-1.c
@@ -27,7 +27,7 @@
 
 #define TNAME "fsync/4-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	char *data;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/fsync/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/fsync/5-1.c
index 9ba9d18d9..0e7ca4efc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/fsync/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/fsync/5-1.c
@@ -21,7 +21,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int fd;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/fsync/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/fsync/7-1.c
index 739aa9479..537dedfd5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/fsync/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/fsync/7-1.c
@@ -28,7 +28,7 @@
 
 #define TNAME "fsync/7-1.c"
 
-int main()
+int main(void)
 {
 	int fd[2];
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/gmtime/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/gmtime/1-1.c
index b48f48d42..03737ee2e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/gmtime/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/gmtime/1-1.c
@@ -14,7 +14,7 @@
 #include <time.h>
 #include <posixtest.h>
 
-int main()
+int main(void)
 {
 	struct tm *tm_ptr;
 	time_t the_time;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/gmtime/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/gmtime/2-1.c
index 236c0bae6..a30b18b3c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/gmtime/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/gmtime/2-1.c
@@ -14,7 +14,7 @@
 #include <time.h>
 #include <posixtest.h>
 
-int main()
+int main(void)
 {
 	struct tm *tm_ptr;
 	time_t the_time;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/1-1.c
index dff175cb4..2bbccd250 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/1-1.c
@@ -45,7 +45,7 @@ void sigrt1_handler(int signum, siginfo_t * info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/10-1.c
index bf588b33e..eb9473942 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/10-1.c
@@ -50,7 +50,7 @@ void sigrt2_handler(int signum, siginfo_t * info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/11-1.c
index 696108c90..727718736 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/11-1.c
@@ -50,7 +50,7 @@ void sigrt2_handler(int signum, siginfo_t * info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/12-1.c
index 795268ab3..82b07567a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/12-1.c
@@ -36,7 +36,7 @@
 #define NUM_AIOCBS	10
 #define BUF_SIZE	1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/13-1.c
index 79f7d071a..ca5645df7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/13-1.c
@@ -36,7 +36,7 @@
 #define NUM_AIOCBS	10
 #define BUF_SIZE	1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/14-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/14-1.c
index 0160e7e02..4cb970ec2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/14-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/14-1.c
@@ -50,7 +50,7 @@ void sigrt2_handler(int signum, siginfo_t * info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/15-1.c
index 3dbdf3b51..436aa9aec 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/15-1.c
@@ -50,7 +50,7 @@ void sigrt2_handler(int signum, siginfo_t * info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/18-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/18-1.c
index e38cd9026..dce082e89 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/18-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/18-1.c
@@ -37,7 +37,7 @@
 #define NUM_AIOCBS	1
 #define BUF_SIZE	1024
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/2-1.c
index 46b3ea9a3..9a9f286f1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/2-1.c
@@ -49,7 +49,7 @@ void sigrt2_handler(int signum, siginfo_t * info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/3-1.c
index 653cb591b..b9e3a8755 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/3-1.c
@@ -50,7 +50,7 @@ void sigrt2_handler(int signum, siginfo_t * info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/4-1.c
index 2be975fdb..68a332dd9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/4-1.c
@@ -50,7 +50,7 @@ void sigrt2_handler(int signum, siginfo_t * info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/5-1.c
index fce5f05ee..be09d1a54 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/5-1.c
@@ -39,7 +39,7 @@
 
 #define TNAME "lio_listio/5-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/6-1.c
index fb5a23357..d073bf9af 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/6-1.c
@@ -32,7 +32,7 @@
 
 #define TNAME "lio_listio/6-1.c"
 
-int main()
+int main(void)
 {
 
 	if (sysconf(_SC_ASYNCHRONOUS_IO) < 200112L)
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/7-1.c
index 3ac5b84e9..d5a54bd52 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/7-1.c
@@ -51,7 +51,7 @@ void sigrt2_handler(int signum, siginfo_t * info, void *context)
 	received_all = 1;
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	int fd;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/8-1.c
index 6adc3b5ce..b260314ec 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/8-1.c
@@ -35,7 +35,7 @@
 
 #define TNAME "lio_listio/8-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/9-1.c
index 08e284c32..147d6e04a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/lio_listio/9-1.c
@@ -35,7 +35,7 @@
 
 #define TNAME "lio_listio/9-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 #define BUF_SIZE 512
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/localtime/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/localtime/1-1.c
index 3987492a1..93a646024 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/localtime/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/localtime/1-1.c
@@ -14,7 +14,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	time_t current_time;
 	struct tm *timeptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mlock/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mlock/10-1.c
index 371e5195e..d60e4635b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mlock/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mlock/10-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int result;
 	long page_size;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mlock/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mlock/12-1.c
index 0056c2273..30d23c5d4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mlock/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mlock/12-1.c
@@ -72,7 +72,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int result;
 	void *ptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mlock/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mlock/5-1.c
index cd27ccb61..01f16820b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mlock/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mlock/5-1.c
@@ -18,7 +18,7 @@
 
 #define BUFSIZE 8
 
-int main()
+int main(void)
 {
 	int result;
 	void *ptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mlock/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mlock/8-1.c
index 80310e04a..d9569008b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mlock/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mlock/8-1.c
@@ -23,7 +23,7 @@
 
 #define BUFSIZE 8
 
-int main()
+int main(void)
 {
 	int result;
 	long page_size;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mlock/speculative/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mlock/speculative/12-1.c
index 72ba3e21f..31729fe05 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mlock/speculative/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mlock/speculative/12-1.c
@@ -73,7 +73,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int result;
 	void *ptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mlockall/speculative/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mlockall/speculative/15-1.c
index e84a1343e..4dd9e637a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mlockall/speculative/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mlockall/speculative/15-1.c
@@ -62,7 +62,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int result;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/1-1.c
index 25cb0375e..5c510c037 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/1-1.c
@@ -22,7 +22,7 @@
 #define TEST "1-1"
 #define FUNCTION "mq_close"
 
-int main()
+int main(void)
 {
 	char qname[50];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/2-1.c
index 4b01cf64e..6b8942343 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/2-1.c
@@ -40,7 +40,7 @@ int child_process(char *qname, int read_pipe, int write_pipe);
 mqd_t open_queue(char *qname, int oflag, int mode);
 int send_receive(int read_pipe, int write_pipe, char send, char *reply);
 
-int main()
+int main(void)
 {
 	char qname[50];
 	pid_t pid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-1.c
index 0606396ab..fba02242a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-1.c
@@ -27,7 +27,7 @@
 #define FUNCTION "mq_close"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	char qname[50];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-2.c
index 2bd5a7303..1415667bd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-2.c
@@ -17,7 +17,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	if (mq_close((mqd_t) - 1) != -1) {
 		printf("mq_close() did not return -1 on invalid descriptor\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-3.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-3.c
index b9e8baf1d..d5d8265bd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/3-3.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	/* Use some arbitrary but high number for the descriptor.  */
 	if (mq_close((mqd_t) 274) != -1) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/4-1.c
index 22d5f1de0..0093c32fc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_close/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_close/4-1.c
@@ -25,7 +25,7 @@
 #define FUNCTION "mq_close"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	char qname[50];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/2-1.c
index d143b5b36..5026ca5ec 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/2-1.c
@@ -36,7 +36,7 @@
 #define NAMESIZE	50
 #define MQFLAGS		O_NONBLOCK
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/2-2.c
index ca3ca7f0b..f44852316 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/2-2.c
@@ -30,7 +30,7 @@
 #define NAMESIZE	50
 #define MQFLAGS		O_NONBLOCK
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/3-1.c
index b2e27497b..3ce5a9d02 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/3-1.c
@@ -32,7 +32,7 @@
 #define MAXMSG		40
 #define MSGSIZE		50
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/4-1.c
index 975d09daf..4811cbc1b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_getattr/4-1.c
@@ -31,7 +31,7 @@
 #define MSGSIZE		50
 #define MAXMSG		40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	const char *msgptr = "test message";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/1-1.c
index 7645ce406..ed7e76649 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/1-1.c
@@ -49,7 +49,7 @@ void mqclean(mqd_t queue, const char *qname)
 	mq_unlink(qname);
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/2-1.c
index ae550216c..79cf5a319 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/2-1.c
@@ -39,7 +39,7 @@ void mqclean(mqd_t queue, const char *qname)
 	mq_unlink(qname);
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/3-1.c
index 109afe3e6..2ddc68baa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/3-1.c
@@ -49,7 +49,7 @@ void mqclean(mqd_t queue, const char *qname)
 	mq_unlink(qname);
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/4-1.c
index 5d2ce2c75..d94d6bdb8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/4-1.c
@@ -46,7 +46,7 @@ void mqclean(mqd_t queue, const char *qname)
 	mq_unlink(qname);
 }
 
-int main()
+int main(void)
 {
 	char mqname[50];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/5-1.c
index 36a81573d..bf5ce5970 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/5-1.c
@@ -57,7 +57,7 @@ void mqclean(mqd_t queue, const char *qname)
 	mq_unlink(qname);
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/8-1.c
index 3fcf56a22..297a75c6f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/8-1.c
@@ -31,7 +31,7 @@
 
 #define NAMESIZE	50
 
-int main()
+int main(void)
 {
 	mqd_t mqdes;
 	struct sigevent notification;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/9-1.c
index 1db06c7d5..3a3cb3e2b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_notify/9-1.c
@@ -38,7 +38,7 @@ void mqclean(mqd_t queue, const char *qname)
 	mq_unlink(qname);
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/1-1.c
index 810fc276b..124f4d42e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/1-1.c
@@ -24,7 +24,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/11-1.c
index bbcc7c0d3..3c78b0448 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/11-1.c
@@ -27,7 +27,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/12-1.c
index 853d2377b..0f82b98c0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/12-1.c
@@ -28,7 +28,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/13-1.c
index 1d153c467..4daefac20 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/13-1.c
@@ -24,7 +24,7 @@
 #define MAXMSG 10
 #define MSGSIZE 5
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/15-1.c
index f8943ab61..1c329d61e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/15-1.c
@@ -22,7 +22,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue, queue2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/16-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/16-1.c
index d44ab30fd..59f1bb69e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/16-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/16-1.c
@@ -36,7 +36,7 @@
 #define NAMESIZE 50
 #define TNAME "mq_open/16-1.c"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	char fname[NAMESIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/18-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/18-1.c
index 1ba4bb889..74b018056 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/18-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/18-1.c
@@ -23,7 +23,7 @@
 #define NAMESIZE 50
 #define MSGSTR "O123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/19-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/19-1.c
index 68ec187ba..1cda173f1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/19-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/19-1.c
@@ -35,7 +35,7 @@
 #define MSGSTR "0123456789"
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/2-1.c
index c3f81eb96..c5ef6665b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/2-1.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/20-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/20-1.c
index 6ca4d3dae..84dbae557 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/20-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/20-1.c
@@ -33,7 +33,7 @@ void handler(int signo)
 #endif
 }
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/21-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/21-1.c
index 52ebbf1fa..3acfb7c63 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/21-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/21-1.c
@@ -26,7 +26,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/23-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/23-1.c
index 91f042589..e07930785 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/23-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/23-1.c
@@ -23,7 +23,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue, queue2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/25-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/25-2.c
index 310191531..406c7ecc2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/25-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/25-2.c
@@ -29,7 +29,7 @@
 
 static int invalid_values[NUMTESTS] = { 0, -1, INT32_MIN };
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/27-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/27-1.c
index a931d359d..7737b0221 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/27-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/27-1.c
@@ -22,7 +22,7 @@
 #include <limits.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	char qname[PATH_MAX * 2];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/27-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/27-2.c
index f7ace4e4b..a489bc2f4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/27-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/27-2.c
@@ -25,7 +25,7 @@
 #include <limits.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	char qname[NAME_MAX * 2];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/29-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/29-1.c
index f45242d9c..359a9096d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/29-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/29-1.c
@@ -23,7 +23,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/3-1.c
index 3df7a448f..0f864407c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/3-1.c
@@ -22,7 +22,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-1.c
index 246053a53..ab77025cb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-1.c
@@ -29,7 +29,7 @@
 #define MSGSTR "0123456789"
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-2.c
index bfe6d73f1..ccbd1e93c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-2.c
@@ -39,7 +39,7 @@ void handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-3.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-3.c
index fc9340e74..75f555816 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/7-3.c
@@ -25,7 +25,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t roqueue, roqueue2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/8-1.c
index 3c6e03f28..3aee9f379 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/8-1.c
@@ -29,7 +29,7 @@
 #define MSGSTR "0123456789"
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/8-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/8-2.c
index a43543484..15405d3ed 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/8-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/8-2.c
@@ -39,7 +39,7 @@ void handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/9-1.c
index b98705f5d..4c6dfa287 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/9-1.c
@@ -33,7 +33,7 @@
 #define MSGSTR "0123456789"
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER], msgrcd2[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/9-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/9-2.c
index 3db3c43c6..53eaa7d24 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/9-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/9-2.c
@@ -39,7 +39,7 @@ void handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/2-2.c
index 74d8d0e24..8190b4de2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/2-2.c
@@ -22,7 +22,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/2-3.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/2-3.c
index 249726ab6..3e30dd618 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/2-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/2-3.c
@@ -22,7 +22,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/26-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/26-1.c
index 849e247eb..bb3608f37 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/26-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/26-1.c
@@ -32,7 +32,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 #ifndef _POSIX_OPEN_MAX
 	printf("_POSIX_OPEN_MAX not defined as expected\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/6-1.c
index 5f675e668..65e9c24ad 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/speculative/6-1.c
@@ -26,7 +26,7 @@
 
 #define NAMESIZE 50
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	mqd_t queue;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/1-1.c
index 5a42f62b4..b7bf0bb92 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/1-1.c
@@ -29,7 +29,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv1[BUFFER], msgrv2[BUFFER];
 	const char *msgptr1 = "test message 1";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/10-1.c
index c56df7330..581135b51 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/10-1.c
@@ -30,7 +30,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/11-1.c
index 713abcd13..f6ce75867 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/11-1.c
@@ -30,7 +30,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/11-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/11-2.c
index ac8180c44..e9307d28e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/11-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/11-2.c
@@ -30,7 +30,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 
 	char mqname[NAMESIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/12-1.c
index 0f8941593..420ea1aba 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/12-1.c
@@ -29,7 +29,7 @@
 #define NAMESIZE 50
 #define BUFFER 20
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	const char *msgptr = "test message";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/13-1.c
index 1f5b8b56c..8f451b367 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/13-1.c
@@ -38,7 +38,7 @@ void stopreceive(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/2-1.c
index 72a8903ab..68f703593 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/2-1.c
@@ -28,7 +28,7 @@
 #define NAMESIZE 50
 #define BUFFER 20
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	const char *msgptr = "test message";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/5-1.c
index f2d1e3d36..aa98276a4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/5-1.c
@@ -37,7 +37,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	const char *msgptr = "test message ";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/7-1.c
index b2b031fd4..b8adb6d60 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/7-1.c
@@ -30,7 +30,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/8-1.c
index 703621739..0c5c54027 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_receive/8-1.c
@@ -33,7 +33,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv1[BUFFER], msgrv2[BUFFER];
 	const char *msgptr1 = "test message1";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/1-1.c
index d921a9823..0eb4f9d34 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/1-1.c
@@ -28,7 +28,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/10-1.c
index 4cb36b443..fc79892d9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/10-1.c
@@ -28,7 +28,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	char msgptr[MESSAGESIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/11-1.c
index 6de443dae..1fc52a5d3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/11-1.c
@@ -24,7 +24,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/11-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/11-2.c
index 20c4a4ede..5289f9b71 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/11-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/11-2.c
@@ -24,7 +24,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/12-1.c
index b348fd669..32f59a6cd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/12-1.c
@@ -51,7 +51,7 @@ void justreturn_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	int pid;
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/13-1.c
index 4819bb70a..c4eaa23e1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/13-1.c
@@ -30,7 +30,7 @@ static unsigned invalidpri[NUMINVALID] = {
 	MQ_PRIO_MAX, MQ_PRIO_MAX + 1, MQ_PRIO_MAX + 5
 };
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/14-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/14-1.c
index 62cd003ed..fdf9ff534 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/14-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/14-1.c
@@ -29,7 +29,7 @@ static long messagesize[NUMINVALID] = {
 	19, 2, 1
 };
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/2-1.c
index 65ab2e02e..c3e478201 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/2-1.c
@@ -23,7 +23,7 @@
 #define MSGSTR "01234567890123456789"
 #define MSGSIZE 10		// < strlen(MSGSTR)
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/3-1.c
index 3bf8cf70d..41837c55e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/3-1.c
@@ -39,7 +39,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr1 = MSG1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/3-2.c
index a8e9cfa23..a78d8702c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/3-2.c
@@ -41,7 +41,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr1 = MSG1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-1.c
index 7773e17c6..082a5fda2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-1.c
@@ -23,7 +23,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-2.c
index 1a008acf0..150b7d42f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-2.c
@@ -23,7 +23,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-3.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-3.c
index e5ddf2276..2a497cf9d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/4-3.c
@@ -29,7 +29,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/5-1.c
index f2198056e..f5675ff73 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/5-1.c
@@ -62,7 +62,7 @@ int cleanup_for_exit(int gqueue, char *gqname, int ret)
 	return ret;
 }
 
-int main()
+int main(void)
 {
 	int pid;
 	char msgrcd[BUFFER];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/5-2.c
index ce8f3b27b..7a8b3ba35 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/5-2.c
@@ -49,7 +49,7 @@ void justreturn_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	int pid;
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/7-1.c
index bed0bf68d..66b3791c3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/7-1.c
@@ -37,7 +37,7 @@
 #define BUFFER 40
 #define MAXMSG 10		// send should end after MAXMSG
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	char msgptr[MESSAGESIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/8-1.c
index 025141e5e..de5ff01fc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/8-1.c
@@ -28,7 +28,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/9-1.c
index aa2bac38c..40f782240 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_send/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_send/9-1.c
@@ -30,7 +30,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/1-1.c
index 2e82e428c..63e4aec62 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/1-1.c
@@ -30,7 +30,7 @@
 #define NAMESIZE	50
 #define MQFLAGS		O_NONBLOCK
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/1-2.c
index beec3de73..03ceb46c2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/1-2.c
@@ -31,7 +31,7 @@
 #define NAMESIZE	50
 #define MQCURMSGS	555
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/2-1.c
index edb4fe74c..d7969936e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/2-1.c
@@ -33,7 +33,7 @@
 #define MQMSGSIZE	777
 #define MQCURMSGS	555
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/5-1.c
index b396312b0..f37236395 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_setattr/5-1.c
@@ -32,7 +32,7 @@
 #define MQFLAGS		1
 #define NAMESIZE	50
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/1-1.c
index 079a37639..ee63bded0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/1-1.c
@@ -30,7 +30,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv1[BUFFER], msgrv2[BUFFER];
 	const char *msgptr1 = "test message 1";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/10-1.c
index 8d73b4380..ff3e926c9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/10-1.c
@@ -29,7 +29,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	const char *msgptr = "test message";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/10-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/10-2.c
index 7644de2a6..a5b15d3a8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/10-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/10-2.c
@@ -33,7 +33,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	const char *msgptr = "test message";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/11-1.c
index 7240ebcdf..66f514363 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/11-1.c
@@ -34,7 +34,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv1[BUFFER], msgrv2[BUFFER];
 	const char *msgptr1 = "test message1";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/13-1.c
index 9698efb88..d615e0c3f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/13-1.c
@@ -31,7 +31,7 @@
 #define NAMESIZE 50
 #define BUFFER	40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/14-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/14-1.c
index 89aa94c8a..39c43f597 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/14-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/14-1.c
@@ -31,7 +31,7 @@
 #define NAMESIZE	50
 #define BUFFER		40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/15-1.c
index c807a7b81..1df8726af 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/15-1.c
@@ -30,7 +30,7 @@
 #define NAMESIZE 50
 #define BUFFER 20
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	const char *msgptr = "test message";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-1.c
index f06149708..0f4e41691 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-1.c
@@ -33,7 +33,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-2.c
index 5b67920d4..65085bf65 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-2.c
@@ -34,7 +34,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-3.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-3.c
index 60ed5fa48..719be803d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/17-3.c
@@ -34,7 +34,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/18-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/18-1.c
index 21a2598d9..a7b3634d9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/18-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/18-1.c
@@ -43,7 +43,7 @@ void exit_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/18-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/18-2.c
index 6e840415e..42a80a77f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/18-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/18-2.c
@@ -44,7 +44,7 @@ void exit_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/2-1.c
index 9da12cc5e..14d61d442 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/2-1.c
@@ -29,7 +29,7 @@
 #define NAMESIZE 50
 #define BUFFER 20
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	const char *msgptr = "test message";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-1.c
index 5e5ffcc1f..778a2cb5d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-1.c
@@ -36,7 +36,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	const char *msgptr = "test message ";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-2.c
index 379ae32d2..ab8dca4be 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-2.c
@@ -43,7 +43,7 @@ void exit_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-3.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-3.c
index c10280fc8..cd4721a90 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/5-3.c
@@ -42,7 +42,7 @@ void stopreceive(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/7-1.c
index 3c6a91212..1e68c0329 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/7-1.c
@@ -31,7 +31,7 @@
 #define NAMESIZE 50
 #define BUFFER	40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/8-1.c
index f7034302f..0d944df42 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/8-1.c
@@ -40,7 +40,7 @@ void exit_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/speculative/10-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/speculative/10-2.c
index 59259c83c..7ace3c4ca 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/speculative/10-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedreceive/speculative/10-2.c
@@ -32,7 +32,7 @@
 #define NAMESIZE 50
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE], msgrv[BUFFER];
 	const char *msgptr = "test message";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/1-1.c
index c7e7b7fa5..0e9de49e2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/1-1.c
@@ -29,7 +29,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/10-1.c
index b9848bba4..993e8817b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/10-1.c
@@ -29,7 +29,7 @@
 #define BUFFER 100
 #define MAXMSG 5
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	char msgptr[MESSAGESIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/11-1.c
index ba871c98f..4842078e7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/11-1.c
@@ -25,7 +25,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/11-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/11-2.c
index 347552f7f..eb218645f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/11-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/11-2.c
@@ -25,7 +25,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/12-1.c
index dbd7af619..1984063e3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/12-1.c
@@ -127,7 +127,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/13-1.c
index 2e04f403f..cd698f5f4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/13-1.c
@@ -31,7 +31,7 @@ static unsigned invalidpri[NUMINVALID] = {
 	MQ_PRIO_MAX, MQ_PRIO_MAX + 1, MQ_PRIO_MAX + 5
 };
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/14-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/14-1.c
index 52bf9ce5d..0fb851f9e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/14-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/14-1.c
@@ -30,7 +30,7 @@ static long messagesize[NUMINVALID] = {
 	19, 2, 1
 };
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/15-1.c
index b8c018af4..5d1ee2d2b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/15-1.c
@@ -49,7 +49,7 @@ void testfailed_handler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main()
+int main(void)
 {
 	char *msgptr = MSGSTR;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/16-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/16-1.c
index d8dc4edae..b6e05b30c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/16-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/16-1.c
@@ -56,7 +56,7 @@ void stopsleep_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	int pid;
 	struct mq_attr attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/18-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/18-1.c
index 4b9999aac..f8807ace0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/18-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/18-1.c
@@ -27,7 +27,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/19-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/19-1.c
index 73523419b..93667a161 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/19-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/19-1.c
@@ -36,7 +36,7 @@ int invalid_tests[NUMTESTS] = { -1, INT32_MIN, 1000000000, 1000000001,
 	INT32_MAX
 };
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/2-1.c
index 332e1500f..3ecc6dcc5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/2-1.c
@@ -24,7 +24,7 @@
 #define MSGSTR "01234567890123456789"
 #define MSGSIZE 10		// < strlen(MSGSTR)
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/20-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/20-1.c
index 175d0a93b..7c77f3435 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/20-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/20-1.c
@@ -49,7 +49,7 @@ void testfailed_handler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main()
+int main(void)
 {
 	char *msgptr = MSGSTR;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/3-1.c
index d656c58a5..c528442e6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/3-1.c
@@ -41,7 +41,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr1 = MSG1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/3-2.c
index f96360d46..3b1a0f7ff 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/3-2.c
@@ -43,7 +43,7 @@
 #define BUFFER 40
 #define MAXMSG 10
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr1 = MSG1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-1.c
index 0455419c8..8e087bb67 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-1.c
@@ -24,7 +24,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-2.c
index ad052628b..4e709eeea 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-2.c
@@ -24,7 +24,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-3.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-3.c
index 9c8ae8a42..93bf979fb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/4-3.c
@@ -30,7 +30,7 @@
 #define BUFFER 40
 #define MAXMSG 5
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-1.c
index 828d2a165..e1a854112 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-1.c
@@ -51,7 +51,7 @@ void stopsleep_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	int pid;
 	char msgrcd[BUFFER];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-2.c
index 542072ef2..0d8941395 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-2.c
@@ -49,7 +49,7 @@ void justreturn_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	int pid;
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-3.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-3.c
index f21e1c46c..47c739894 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/5-3.c
@@ -53,7 +53,7 @@ void stopsleep_handler(int signo)
 	return;
 }
 
-int main()
+int main(void)
 {
 	int pid;
 	struct mq_attr attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/7-1.c
index 32f71e353..898ed8284 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/7-1.c
@@ -37,7 +37,7 @@
 #define BUFFER 40
 #define MAXMSG 5
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	char msgptr[MESSAGESIZE];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/8-1.c
index 7d3af7049..0f9e8d4c9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/8-1.c
@@ -29,7 +29,7 @@
 #define BUFFER 40
 #define MAXMSG 5
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/9-1.c
index 2c8cb8400..194267539 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/9-1.c
@@ -31,7 +31,7 @@
 #define MSGSTR "0123456789"
 #define BUFFER 40
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE], msgrcd[BUFFER];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/speculative/18-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/speculative/18-2.c
index 1b19eeec6..1ad86118a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/speculative/18-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_timedsend/speculative/18-2.c
@@ -27,7 +27,7 @@
 #define NAMESIZE 50
 #define MSGSTR "0123456789"
 
-int main()
+int main(void)
 {
 	char qname[NAMESIZE];
 	const char *msgptr = MSGSTR;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/1-1.c
index 1778e635a..cc8b9aa31 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/1-1.c
@@ -28,7 +28,7 @@
 
 #define NAMESIZE	50
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	mqd_t mqdes;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/2-1.c
index b11b59237..e7b18cf8b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/2-1.c
@@ -48,7 +48,7 @@ int parent_process(char *mqname, int read_pipe, int write_pipe, int child_pid);
 int child_process(char *mqname, int read_pipe, int write_pipe);
 int send_receive(int read_pipe, int write_pipe, char send, char *reply);
 
-int main()
+int main(void)
 {
 	char mqname[NAMESIZE];
 	pid_t pid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/2-2.c
index 48f1faf7e..6888bbdfa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/2-2.c
@@ -43,7 +43,7 @@ int parent_process(char *mqname, int read_pipe, int write_pipe, int child_pid);
 int child_process(char *mqname, int read_pipe, int write_pipe);
 int send_receive(int read_pipe, int write_pipe, char send, char *reply);
 
-int main()
+int main(void)
 {
 	char mqname[50];
 	pid_t pid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/7-1.c
index 484053070..d45cf3f19 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/7-1.c
@@ -25,7 +25,7 @@
 #define TEST "7-1"
 #define FUNCTION "mq_unlink"
 
-int main()
+int main(void)
 {
 	char mqname[50] = "/something-which-does-not-exit";
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/speculative/7-2.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/speculative/7-2.c
index 21496bfd4..446cd691a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/speculative/7-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_unlink/speculative/7-2.c
@@ -26,7 +26,7 @@
 #define TEST "7-2"
 #define FUNCTION "mq_unlink"
 
-int main()
+int main(void)
 {
 	char mqname[50] = "/123";
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munlock/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munlock/10-1.c
index 01c1c9fc1..cf870289b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munlock/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munlock/10-1.c
@@ -23,7 +23,7 @@
 
 #define BUFSIZE 8
 
-int main()
+int main(void)
 {
 	int result;
 	long page_size;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munlock/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munlock/11-1.c
index 2e033fc9f..a684e3559 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munlock/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munlock/11-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int result;
 	long page_size;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munlock/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munlock/7-1.c
index 47d40c25b..bc4d335f2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munlock/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munlock/7-1.c
@@ -18,7 +18,7 @@
 
 #define BUFSIZE 8
 
-int main()
+int main(void)
 {
 	int result;
 	void *ptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munlockall/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munlockall/5-1.c
index 2d65857d0..8f86c166f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munlockall/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munlockall/5-1.c
@@ -19,7 +19,7 @@
 
 #if !defined(_POSIX_MEMLOCK) || _POSIX_MEMLOCK == -1
 
-int main()
+int main(void)
 {
 	printf("Does not support ML (Memory Lock).\n");
 	return PTS_UNSUPPORTED;
@@ -28,7 +28,7 @@ int main()
 #else
 
 #if _POSIX_MEMLOCK != 0
-int main()
+int main(void)
 {
 	int result;
 
@@ -50,7 +50,7 @@ int main()
 
 #else
 
-int main()
+int main(void)
 {
 	int result;
 	long memlock;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munmap/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munmap/1-1.c
index b29e40196..e536329ea 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munmap/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munmap/1-1.c
@@ -42,7 +42,7 @@ void sigsegv_handler(int signum)
 	exit(PTS_PASS);
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	long file_size;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munmap/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/munmap/1-2.c
index 93d15232a..dff15b792 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munmap/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munmap/1-2.c
@@ -42,7 +42,7 @@ void sigsegv_handler(int signum)
 	exit(PTS_PASS);
 }
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	long file_size;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munmap/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munmap/2-1.c
index f71687343..aa68543fc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munmap/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munmap/2-1.c
@@ -26,7 +26,7 @@
 
 #define TNAME "munmap/2-1.c"
 
-int main()
+int main(void)
 {
 	int rc;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munmap/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munmap/3-1.c
index 4f129d05b..59b9f8deb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munmap/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munmap/3-1.c
@@ -29,7 +29,7 @@
 
 #define TNAME "munmap/3-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	long file_size;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munmap/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munmap/4-1.c
index cd691c3ac..5b21908fe 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munmap/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munmap/4-1.c
@@ -35,7 +35,7 @@
 
 #define TNAME "munmap/4-1.c"
 
-int main()
+int main(void)
 {
 	int rc;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munmap/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munmap/8-1.c
index a57f1896b..0adf23438 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munmap/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munmap/8-1.c
@@ -28,7 +28,7 @@
 
 #define TNAME "munmap/8-1.c"
 
-int main()
+int main(void)
 {
 	int rc;
 	void *pa;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/munmap/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/munmap/9-1.c
index 4ded918f7..a5a30ebf2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/munmap/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/munmap/9-1.c
@@ -26,7 +26,7 @@
 
 #define TNAME "munmap/9-1.c"
 
-int main()
+int main(void)
 {
 	char tmpfname[256];
 	long file_size;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-1.c
index 9f1827316..96303ba73 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-1.c
@@ -12,7 +12,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage, tsbefore, tsafter;
 	int sleepnsec = 3;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-2.c
index 9c7558b0f..76f319825 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-2.c
@@ -15,7 +15,7 @@
 #include <sys/wait.h>
 #include "posixtest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage, tsbefore, tsafter;
 	int sleepsec = 30;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-3.c
index c37668868..118945202 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/1-3.c
@@ -21,7 +21,7 @@ void handler(int signo)
 	printf("In handler\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage, tsbefore, tsafter;
 	int sleepsec = 30;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/10000-1.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/10000-1.c
index 43877ea73..98f5bc98f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/10000-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/10000-1.c
@@ -44,7 +44,7 @@ static int sleepinvalid[NUMINVALID][2] = { {-1, -1}, {0, -1},
 {0, 1075002478}
 };
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage, tsbefore, tsafter;
 	int i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/2-1.c
index 46da47af6..45a509ea1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/2-1.c
@@ -14,7 +14,7 @@
 #include "posixtest.h"
 
 #define NUMINTERVALS 13
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage, tsbefore, tsafter;
 	int sleepnsec[NUMINTERVALS] = { 1, 2, 10, 100, 1000, 10000, 1000000,
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/3-1.c
index f7b701624..a4ad94cfd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/3-1.c
@@ -28,7 +28,7 @@ void handler(int signo)
 	exit(CHILDSUCCESS);
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage;
 	int sleepsec = 30;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/3-2.c
index 31873de17..4016fb4e6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/3-2.c
@@ -21,7 +21,7 @@
 #define CHILDPASS 0		//if interrupted, child will return 0
 #define CHILDFAIL 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int pid, slepts;
 	struct timespec tsbefore, tsafter;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/5-1.c
index 23687784c..c97691aee 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/5-1.c
@@ -12,7 +12,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage;
 	int sleepnsec = -1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/5-2.c
index f14ec5e0d..52ca89a40 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/5-2.c
@@ -24,7 +24,7 @@ void handler(int signo)
 	printf("In handler\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage;
 	int sleepsec = 30;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/6-1.c
index f8bf0f642..398f5d527 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/6-1.c
@@ -15,7 +15,7 @@
 
 #define NUMTESTS 7
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage;
 	int sleepnsec[NUMTESTS] = { -1, -5, -1000000000, 1000000000,
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/7-1.c
index 7b935cbb2..f2686832e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/7-1.c
@@ -25,7 +25,7 @@ void handler(int signo)
 	printf("In handler\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage;
 	int sleepsec = 30;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/7-2.c b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/7-2.c
index e15b62f43..34ff02c17 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/7-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/nanosleep/7-2.c
@@ -27,7 +27,7 @@ void handler(int signo)
 	printf("In handler\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct timespec tssleepfor, tsstorage, tsbefore, tsafter;
 	int sleepsec = 30;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/1-1.c
index 00256f57a..ac61f42a5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/1-1.c
@@ -56,7 +56,7 @@ static void child_handler()
 	return;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/1-2.c
index 19d885aa9..a47d635a8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/1-2.c
@@ -175,7 +175,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/2-1.c
index 23e219cc4..5172b823c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/2-1.c
@@ -26,7 +26,7 @@
 #include <sys/types.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/2-2.c
index 293886641..49aacdf8a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/2-2.c
@@ -200,7 +200,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t ch;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/3-2.c
index 58e31ea76..aa1779296 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/3-2.c
@@ -161,7 +161,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	pthread_t ch;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/3-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/3-3.c
index ede73a4d4..b69a469de 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/3-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/3-3.c
@@ -199,7 +199,7 @@ void *test(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2, me;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/4-1.c
index cca33d6bb..15e5f935f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_atfork/4-1.c
@@ -212,7 +212,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t ch;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/1-1.c
index 915773113..757085f81 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/1-1.c
@@ -31,7 +31,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t new_attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/2-1.c
index 91c6d2120..605f02e7c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/2-1.c
@@ -22,7 +22,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/3-1.c
index 5b241f255..d36e5f224 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_destroy/3-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getdetachstate/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getdetachstate/1-1.c
index b144f481d..503986d59 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getdetachstate/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getdetachstate/1-1.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	int detach_state;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getdetachstate/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getdetachstate/1-2.c
index de16286c7..a4d09d120 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getdetachstate/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getdetachstate/1-2.c
@@ -24,7 +24,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	int detach_state;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getinheritsched/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getinheritsched/1-1.c
index f9465a729..cd983afce 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getinheritsched/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getinheritsched/1-1.c
@@ -53,7 +53,7 @@ int verify_inheritsched(pthread_attr_t * attr, int schedtype)
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int rc = 0;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getschedparam/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getschedparam/1-1.c
index 89f1c5c17..9d8bb064a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getschedparam/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getschedparam/1-1.c
@@ -45,7 +45,7 @@ int verify_param(pthread_attr_t * attr, int priority)
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int rc = 0;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getschedpolicy/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getschedpolicy/2-1.c
index 2f3e6d6d0..6c3a2dd36 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getschedpolicy/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getschedpolicy/2-1.c
@@ -60,7 +60,7 @@ int verify_policy(pthread_attr_t * attr, int policytype)
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int rc = 0;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getscope/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getscope/1-1.c
index 61eaf3463..230e24e99 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getscope/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getscope/1-1.c
@@ -55,7 +55,7 @@ int verify_scope(pthread_attr_t * attr, int scopetype)
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int rc = 0;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getstack/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getstack/1-1.c
index e9f22adac..b96a31e9d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getstack/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getstack/1-1.c
@@ -27,7 +27,7 @@
 #define FUNCTION "pthread_attr_getstack"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	pthread_attr_t attr;
 	void *stack_addr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getstacksize/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getstacksize/1-1.c
index 8bd77b648..9903333c3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getstacksize/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_getstacksize/1-1.c
@@ -27,7 +27,7 @@
 #define FUNCTION "pthread_attr_getstacksize"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	pthread_attr_t attr;
 	size_t stack_size;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/1-1.c
index adfb502e9..5d7096d10 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/1-1.c
@@ -24,7 +24,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	int detach_state;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/2-1.c
index e8e735bd3..0add4ce78 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/2-1.c
@@ -50,7 +50,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t new_attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/3-1.c
index bce109f23..976d7f5ec 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/3-1.c
@@ -29,7 +29,7 @@ void *a_thread_func(void *attr)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_threads[NUM_THREADS];
 	pthread_attr_t new_attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/4-1.c
index 669d48f39..a81dd7db2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_init/4-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/1-1.c
index 2211e5c52..46eaab5f1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/1-1.c
@@ -31,7 +31,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	int detach_state;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/1-2.c
index cb902bbbf..de88ec850 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/1-2.c
@@ -31,7 +31,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	int detach_state;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/2-1.c
index 81deb5ed4..f7fcc592b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/2-1.c
@@ -32,7 +32,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t new_attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/4-1.c
index 222c86310..819b5ceb2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setdetachstate/4-1.c
@@ -21,7 +21,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	int ret_val, invalid_val;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/1-1.c
index 67281c7b7..6b67404d1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/1-1.c
@@ -53,7 +53,7 @@ int verify_inheritsched(pthread_attr_t * attr, int schedtype)
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int rc = 0;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-1.c
index caf583b07..edded2116 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-1.c
@@ -53,7 +53,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-2.c
index 816266141..ce13789be 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-2.c
@@ -59,7 +59,7 @@ void *thread_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-3.c
index 64ddddff9..501a06f75 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-3.c
@@ -53,7 +53,7 @@ void *thread(void *tmp)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_attr_t attr;
 	pthread_t thread_id;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-4.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-4.c
index 2651524b9..a3889dfeb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/2-4.c
@@ -53,7 +53,7 @@ void *thread(void *tmp)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_attr_t attr;
 	pthread_t thread_id;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/4-1.c
index ff2f0cbe2..f723c67b6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setinheritsched/4-1.c
@@ -26,7 +26,7 @@
 
 #define INVALIDSCHED 999
 
-int main()
+int main(void)
 {
 	int rc = 0;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-1.c
index 2ec726120..bee2aa067 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-1.c
@@ -34,7 +34,7 @@ void *thread_func()
 	return (void *)(0);
 }
 
-int main()
+int main(void)
 {
 	pthread_t thread;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-2.c
index 14f91e3f6..30f3add0e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-2.c
@@ -35,7 +35,7 @@ void *thread_func()
 	return (void *)(0);
 }
 
-int main()
+int main(void)
 {
 	pthread_t thread;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-3.c
index 2f9e46a6c..6e0d4f517 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-3.c
@@ -51,7 +51,7 @@ void *thread(void *tmp)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t thread_id;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-4.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-4.c
index 595504c83..c8301a993 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/1-4.c
@@ -54,7 +54,7 @@ void *thread(void *tmp)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t thread_id;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/speculative/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/speculative/3-1.c
index f9072d936..948433729 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/speculative/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/speculative/3-1.c
@@ -25,7 +25,7 @@
 #define FIFOPOLICY SCHED_FIFO
 #define PRIORITY_OFFSET 1000
 
-int main()
+int main(void)
 {
 	pthread_attr_t attr;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/speculative/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/speculative/3-2.c
index f1289d7a5..189209117 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/speculative/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setschedparam/speculative/3-2.c
@@ -25,7 +25,7 @@
 #define RRPOLICY SCHED_RR
 #define PRIORITY_OFFSET 1000
 
-int main()
+int main(void)
 {
 	pthread_attr_t attr;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setscope/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setscope/1-1.c
index 82ff979b3..603b1e701 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setscope/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setscope/1-1.c
@@ -33,7 +33,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setscope/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setscope/4-1.c
index 8f5dfcccf..e9ec8999c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setscope/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setscope/4-1.c
@@ -26,7 +26,7 @@
 
 #define INVALIDSCOPE 999
 
-int main()
+int main(void)
 {
 	int rc = 0;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/1-1.c
index 89ba4dcaf..6fdb78a81 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/1-1.c
@@ -38,7 +38,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/2-1.c
index 07346eb97..e792a5e34 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/2-1.c
@@ -59,7 +59,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/4-1.c
index 71738f010..2fada7342 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/4-1.c
@@ -50,7 +50,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/6-1.c
index 6814f7d51..38aa5bccb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/6-1.c
@@ -37,7 +37,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_attr_t attr;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/7-1.c
index bf5b3efb9..649400abd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstack/7-1.c
@@ -38,7 +38,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_attr_t attr;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstacksize/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstacksize/1-1.c
index f1d0873ca..a9697e332 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstacksize/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstacksize/1-1.c
@@ -35,7 +35,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstacksize/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstacksize/4-1.c
index 86f525f7e..ede811d53 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstacksize/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_attr_setstacksize/4-1.c
@@ -34,7 +34,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_attr_t attr;
 	void *saddr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_destroy/1-1.c
index 6c503ab16..d83a6db1e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_destroy/1-1.c
@@ -27,7 +27,7 @@
 static pthread_barrier_t barrier;
 #define LOOP_NUM 5
 
-int main()
+int main(void)
 {
 	int cnt;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_destroy/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_destroy/2-1.c
index 035e2f372..7abb08ff8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_destroy/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_destroy/2-1.c
@@ -60,7 +60,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/1-1.c
index fd89ebef2..a7d13bf97 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/1-1.c
@@ -29,7 +29,7 @@
 
 static pthread_barrier_t barrier;
 
-int main()
+int main(void)
 {
 	int rc;
 	pthread_barrierattr_t ba;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/3-1.c
index 143d6fa15..9f0810673 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/3-1.c
@@ -24,7 +24,7 @@
 #include <string.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int rc;
 	pthread_barrier_t barrier;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/4-1.c
index 45323d96f..b4d776b3c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_init/4-1.c
@@ -66,7 +66,7 @@ void sig_handler()
 	exit(PTS_PASS);
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/1-1.c
index 23e1d2c01..fca37eccf 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/1-1.c
@@ -61,7 +61,7 @@ void sig_handler()
 	exit(PTS_FAIL);
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/2-1.c
index 9fd529cf4..01702698b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/2-1.c
@@ -66,7 +66,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t child_threads[THREAD_NUM];
 	int cnt;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/3-1.c
index cd24f92e5..4118666de 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/3-1.c
@@ -74,7 +74,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/3-2.c
index 530ec372c..c795ecdbc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/3-2.c
@@ -80,7 +80,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/6-1.c
index df315f241..fa61360b3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrier_wait/6-1.c
@@ -33,7 +33,7 @@ void sig_handler()
 	exit(PTS_PASS);
 }
 
-int main()
+int main(void)
 {
 	pthread_barrier_t barrier;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_destroy/1-1.c
index b4b19b5d9..059d21182 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_destroy/1-1.c
@@ -21,7 +21,7 @@
 #include <string.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int rc;
 	pthread_barrierattr_t ba;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_getpshared/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_getpshared/1-1.c
index 2ceaf6aec..27e67658a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_getpshared/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_getpshared/1-1.c
@@ -21,7 +21,7 @@
 #include <string.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int rc;
 	pthread_barrierattr_t ba;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_getpshared/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_getpshared/2-1.c
index 6ff9776ef..3351a97aa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_getpshared/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_getpshared/2-1.c
@@ -48,7 +48,7 @@ void sig_handler()
 	exit(PTS_FAIL);
 }
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_init/1-1.c
index fd258d4ae..c2e3470a1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_init/1-1.c
@@ -22,7 +22,7 @@
 #include <string.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int rc;
 	pthread_barrierattr_t ba;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_init/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_init/2-1.c
index 28fdd688a..a9862897b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_init/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_init/2-1.c
@@ -24,7 +24,7 @@
 
 #define BARRIER_NUM 100
 
-int main()
+int main(void)
 {
 	int rc;
 	pthread_barrierattr_t ba;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_setpshared/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_setpshared/1-1.c
index 7e65438a2..5b3e44b0a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_setpshared/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_setpshared/1-1.c
@@ -18,7 +18,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_setpshared/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_setpshared/2-1.c
index b73e367c0..97dace720 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_setpshared/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_barrierattr_setpshared/2-1.c
@@ -21,7 +21,7 @@
 #include <string.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-1.c
index e5bfff8b0..6a0e41feb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-1.c
@@ -72,7 +72,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-2.c
index 6ad92762c..ac24ac4a3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-2.c
@@ -69,7 +69,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-3.c
index 596aaca40..4ee24414f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/1-3.c
@@ -84,7 +84,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-1.c
index d2a456500..7584ebc7b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-1.c
@@ -60,7 +60,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-2.c
index 4f9f4cfc7..e7c24c393 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-2.c
@@ -71,7 +71,7 @@ void *a_thread_func(void *tmp)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-3.c
index 1353d2009..42af238ab 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/2-3.c
@@ -92,7 +92,7 @@ void *a_thread_func(void *tmp)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/3-1.c
index d91e6e0f5..40469d6f3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/3-1.c
@@ -89,7 +89,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/4-1.c
index 63ff9aafd..91fe55051 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/4-1.c
@@ -35,7 +35,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/5-1.c
index 8e8d21fc7..71d2e494b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cancel/5-1.c
@@ -30,7 +30,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-1.c
index c4c2bc1c0..ff431dd12 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-1.c
@@ -58,7 +58,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-2.c
index 3c0cfa951..17b24667c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-2.c
@@ -58,7 +58,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-3.c
index 9ae7ab455..6cd7165f4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_pop/1-3.c
@@ -66,7 +66,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-1.c
index 5231c245f..80b83b089 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-1.c
@@ -53,7 +53,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-2.c
index 020de7973..b7c54d50e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-2.c
@@ -75,7 +75,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	void *value_ptr;	/* hold return value of thread from pthread_join */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-3.c
index ea85bf46b..6617c996a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cleanup_push/1-3.c
@@ -52,7 +52,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/1-1.c
index b94f8f081..4c5cc65d4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/1-1.c
@@ -62,7 +62,7 @@ static void *thr_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int i, rc;
 	pthread_t thread[THREAD_NUM];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/1-2.c
index f95f914cd..ba5736052 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/1-2.c
@@ -296,7 +296,7 @@ static void children_number(void)
 }
 #endif
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-1.c
index e04a8567e..ef31372c8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-1.c
@@ -71,7 +71,7 @@ static void *thr_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int i, rc;
 	pthread_t thread[THREAD_NUM];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-2.c
index 61f1413c3..03bf8de89 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-2.c
@@ -84,7 +84,7 @@ static void *thr_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int i, rc;
 	pthread_t thread[THREAD_NUM];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-3.c
index 9c8aadc7a..c07de5221 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/2-3.c
@@ -244,7 +244,7 @@ static void *timer(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/4-1.c
index e4e24063b..b3c96b6b7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/4-1.c
@@ -60,7 +60,7 @@ static void *thr_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int i, rc;
 	pthread_t thread[THREAD_NUM];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/4-2.c
index 3bfd474ba..01ec6340a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_broadcast/4-2.c
@@ -175,7 +175,7 @@ static void *worker(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	pthread_t th_waiter[5], th_worker, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/1-1.c
index 30ba58735..2e827909c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/1-1.c
@@ -18,7 +18,7 @@
 pthread_cond_t cond1, cond2;
 pthread_cond_t cond3 = PTHREAD_COND_INITIALIZER;
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/2-1.c
index 975574dc2..daafcc209 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/2-1.c
@@ -329,7 +329,7 @@ void *timer(void *arg)
 
 /* main function */
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/3-1.c
index ba9c5f50a..d07a199cb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/3-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_cond_t cond;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/speculative/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/speculative/4-1.c
index 4bf7da388..9df7c1993 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/speculative/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_destroy/speculative/4-1.c
@@ -59,7 +59,7 @@ void *thread(void *tmp)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t low_id;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-1.c
index 0e885c5d1..12814a5da 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-1.c
@@ -78,7 +78,7 @@ void *thr_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int i, rc;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-2.c
index 6eb3144d7..2efdddac7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/1-2.c
@@ -287,7 +287,7 @@ void *timer(void *arg)
 
 /* main function */
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/2-1.c
index 1e8c4da5d..3bb025da5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/2-1.c
@@ -95,7 +95,7 @@ void *thr_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int i;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/2-2.c
index 72f882ac1..8550065d8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/2-2.c
@@ -94,7 +94,7 @@ void *thr_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int i;
 	pthread_t thread[THREAD_NUM];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/4-1.c
index 7351369ab..acbc41c75 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/4-1.c
@@ -74,7 +74,7 @@ void *thr_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int i, rc;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/4-2.c
index 0a931c886..c49b52852 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_signal/4-2.c
@@ -219,7 +219,7 @@ void *worker(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_waiter, th_worker, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/1-1.c
index b51fd98cf..17640aacb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/1-1.c
@@ -75,7 +75,7 @@ void *t1_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t thread1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-1.c
index 1e689ed99..6e482e026 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-1.c
@@ -94,7 +94,7 @@ void *t1_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t thread1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-4.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-4.c
index 71745bd0c..6783b3765 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-4.c
@@ -272,7 +272,7 @@ void *tf(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	pthread_mutexattr_t ma;
@@ -663,7 +663,7 @@ int main(int argc, char *argv[])
 }
 
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-5.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-5.c
index 8b53346a9..395629013 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-5.c
@@ -167,7 +167,7 @@ void *threaded(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i, j;
 	pthread_mutexattr_t ma;
@@ -378,7 +378,7 @@ int main(int argc, char *argv[])
 }
 
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-6.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-6.c
index d515f2c57..6d77ce6f2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-6.c
@@ -215,7 +215,7 @@ void *threaded(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	void *rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-7.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-7.c
index 13ad2b3f4..21e6df543 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/2-7.c
@@ -278,7 +278,7 @@ void *tf(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	pthread_mutexattr_t ma;
@@ -664,7 +664,7 @@ int main(int argc, char *argv[])
 }
 
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/3-1.c
index f2630e08d..d3f5944f8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/3-1.c
@@ -79,7 +79,7 @@ void *t1_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t thread1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-1.c
index b18cb8f12..83d8e276c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-1.c
@@ -62,7 +62,7 @@ void *t1_func(void *arg)
 	}
 }
 
-int main()
+int main(void)
 {
 	pthread_t thread1;
 	int th_ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-2.c
index 46d0b90f6..54c895a98 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-2.c
@@ -224,7 +224,7 @@ void *tf(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i, j, k;
 	pthread_mutexattr_t ma;
@@ -652,7 +652,7 @@ int main(int argc, char *argv[])
 }
 
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-3.c
index bafa771bf..6a3e86869 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_timedwait/4-3.c
@@ -256,7 +256,7 @@ void *worker(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_waiter, th_worker, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/1-1.c
index c48743dcb..80d0d2c73 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/1-1.c
@@ -65,7 +65,7 @@ void *t1_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-1.c
index c1b2bb907..fbda967f9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-1.c
@@ -78,7 +78,7 @@ void *t1_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-2.c
index ee330a3b2..54775d3e5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-2.c
@@ -258,7 +258,7 @@ void *tf(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	pthread_mutexattr_t ma;
@@ -649,7 +649,7 @@ int main(int argc, char *argv[])
 }
 
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-3.c
index d3564e78a..5987643a9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/2-3.c
@@ -206,7 +206,7 @@ void *threaded(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	void *rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/3-1.c
index ccc195a96..57dfb40ef 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/3-1.c
@@ -74,7 +74,7 @@ void *t1_func(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/4-1.c
index 5cdfa0871..b97e35b14 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_cond_wait/4-1.c
@@ -242,7 +242,7 @@ void *worker(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_waiter, th_worker, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/1-1.c
index aa6943ce2..25242b370 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/1-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/2-1.c
index c3b6d3b99..3c902a49e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/2-1.c
@@ -23,7 +23,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/3-1.c
index 5d2e182e6..af93d2e34 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/3-1.c
@@ -21,7 +21,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/4-1.c
index f9bac02a9..d0aa32f8a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_destroy/4-1.c
@@ -20,7 +20,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t *condattr = NULL;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getclock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getclock/1-1.c
index 9ae24956b..5c23cfd26 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getclock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getclock/1-1.c
@@ -21,7 +21,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 	clockid_t clockid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getclock/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getclock/1-2.c
index 306562d0f..d4c8806fa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getclock/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getclock/1-2.c
@@ -22,7 +22,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 	clockid_t clockid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/1-1.c
index 4bdae7be0..36bc78494 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/1-1.c
@@ -24,7 +24,7 @@
 
 #define NUM_OF_CONDATTR 10
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/1-2.c
index d50457bbb..1ac27495f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/1-2.c
@@ -24,7 +24,7 @@
 
 #define NUM_OF_CONDATTR 10
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/2-1.c
index 65df5a64d..6db9fd4b0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_getpshared/2-1.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_init/1-1.c
index 16fcb409c..63a6c2797 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_init/1-1.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_init/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_init/3-1.c
index b18b03ece..bfc3c3055 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_init/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_init/3-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-1.c
index a1b8fa6d9..12feff66b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-1.c
@@ -22,7 +22,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-2.c
index b1938dcd3..a6e4d60e7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-2.c
@@ -26,7 +26,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-3.c
index 46715b2c3..3de0fe913 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/1-3.c
@@ -27,7 +27,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 #if _POSIX_CPUTIME == -1
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/2-1.c
index f68d6ecfc..60ae3b386 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setclock/2-1.c
@@ -29,7 +29,7 @@
 
 #define INVALID_CLOCKID -100
 
-int main()
+int main(void)
 {
 	pthread_condattr_t condattr;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/1-1.c
index 53362fcfd..cc463aa76 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/1-1.c
@@ -31,7 +31,7 @@
 
 #define NUM_OF_CONDATTR 10
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/1-2.c
index 7fc4f9a36..0d691fac4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/1-2.c
@@ -31,7 +31,7 @@
 
 #define NUM_OF_CONDATTR 10
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/2-1.c
index 9f8d74a3b..0d6261441 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_condattr_setpshared/2-1.c
@@ -27,7 +27,7 @@
 
 #define INVALID_PSHARED_VALUE -100
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-1.c
index ba07646c8..ccc33588b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-1.c
@@ -25,7 +25,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t main_th, new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-2.c
index acc6c4b4d..a648f3ea2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-2.c
@@ -32,7 +32,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-3.c
index d8f1dd68b..bc33fe9dc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-3.c
@@ -31,7 +31,7 @@ void alarm_handler();
 
 pthread_t a;
 
-int main()
+int main(void)
 {
 
 	/* Set the action for SIGALRM to generate an error if it is
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-4.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-4.c
index 5deb31b44..90f81de83 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/1-4.c
@@ -149,7 +149,7 @@ void *threaded(void *arg)
 	return arg;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	struct testdata td;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/11-1.c
index 6aeccd1f1..d10751849 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/11-1.c
@@ -38,7 +38,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 #if _POSIX_THREAD_CPUTIME == -1
 	printf("_POSIX_THREAD_CPUTIME not supported\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/12-1.c
index 2c22fb3c5..1450927fb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/12-1.c
@@ -26,7 +26,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/14-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/14-1.c
index 16458db20..5c7486b41 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/14-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/14-1.c
@@ -273,7 +273,7 @@ void *test(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/2-1.c
index f486db8b6..0268bed48 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/2-1.c
@@ -32,7 +32,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/3-1.c
index 4d6fc7ac8..ebc737e08 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/3-1.c
@@ -48,7 +48,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t new_attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/3-2.c
index fa6f66544..7db4edcae 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/3-2.c
@@ -402,7 +402,7 @@ void *schedtest(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	int do_stack_tests;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/4-1.c
index cccbe5d7b..27a1bc5cb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/4-1.c
@@ -27,7 +27,7 @@ pthread_t self_th;		/* Save the value of the function call pthread_self()
 				   within the thread.  Keeping it global so 'main' can
 				   see it too. */
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/5-1.c
index 283c33724..f6336c715 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/5-1.c
@@ -32,7 +32,7 @@ void *a_thread_func(void *num)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	long i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/5-2.c
index 653c80186..e42251e14 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/5-2.c
@@ -35,7 +35,7 @@ void *a_thread_func(void *num)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int i[NUM_THREADS], j;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/8-1.c
index 79c956dff..9d13381a9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/8-1.c
@@ -42,7 +42,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	sigset_t main_sigmask, main_pendingset;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/8-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/8-2.c
index 69344e3b2..f17e326ed 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/8-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_create/8-2.c
@@ -136,7 +136,7 @@ void *threaded(void *arg)
 	return arg;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	pthread_t child;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/1-1.c
index db931a940..1d77335f1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/1-1.c
@@ -37,7 +37,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	pthread_t new_th;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/1-2.c
index ea9fc82f2..5fe2646d5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/1-2.c
@@ -121,7 +121,7 @@ void *threaded(void *arg)
 	return arg;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	pthread_t child;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/2-1.c
index 8f5cf03f4..6258b751e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/2-1.c
@@ -36,7 +36,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	pthread_t new_th;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/2-2.c
index 730397d31..baad54d5a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/2-2.c
@@ -132,7 +132,7 @@ void *threaded(void *arg)
 	return arg;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	pthread_t child;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/3-1.c
index d0fef69a2..bb7c4919e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/3-1.c
@@ -36,7 +36,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	pthread_t new_th;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-1.c
index 170419523..4a3de9e91 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-1.c
@@ -41,7 +41,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_attr_t new_attr;
 	pthread_t new_th;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-2.c
index ba40197f6..67662296f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-2.c
@@ -35,7 +35,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
index 2a659bc35..ceeeef8ea 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
@@ -335,7 +335,7 @@ void main_loop()
 	output("Test finished after %lu usec.\n", usec - usec_start);
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	scenar_init();
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/1-1.c
index accacfd2c..7f2561826 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/1-1.c
@@ -28,7 +28,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/1-2.c
index 3654b0aaa..a6e9d78bf 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/1-2.c
@@ -28,7 +28,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th1, new_th2;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/2-1.c
index b7d258bdb..1c6db5ce9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_equal/2-1.c
@@ -183,7 +183,7 @@ void *test(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2, me;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/1-1.c
index 500c1be1d..a5c76c0fa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/1-1.c
@@ -38,7 +38,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int *value_ptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/1-2.c
index 04ab6b0af..88f6428b5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/1-2.c
@@ -108,7 +108,7 @@ void *threaded(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	void *rval;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/2-1.c
index bcd938ad2..844e55ac7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/2-1.c
@@ -72,7 +72,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/2-2.c
index d37466f59..b15c07a71 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/2-2.c
@@ -126,7 +126,7 @@ void *threaded(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	void *rval;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/3-1.c
index 75c5118dd..1f1a07b80 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/3-1.c
@@ -59,7 +59,7 @@ void *a_thread_func(void *tmp)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/3-2.c
index 01bab15ec..d4ec1f4ef 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/3-2.c
@@ -152,7 +152,7 @@ void *threaded(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	void *rval;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/4-1.c
index b45f21537..481bff6e6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/4-1.c
@@ -130,7 +130,7 @@ void *threaded(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	void *rval;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/5-1.c
index d5dddfa1c..e9e5b0133 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/5-1.c
@@ -148,7 +148,7 @@ void *threaded(void *arg)
 }
 
 /* Main routine */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	int ctl = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/6-1.c
index dfedcf2a3..32d7ed58b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_exit/6-1.c
@@ -190,7 +190,7 @@ void *threaded(void *arg)
 }
 
 /* Main routine */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	pthread_t child;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getcpuclockid/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getcpuclockid/1-1.c
index 449538081..284d79e6f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getcpuclockid/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getcpuclockid/1-1.c
@@ -43,7 +43,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int rc;
 	pthread_t new_th;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getcpuclockid/speculative/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getcpuclockid/speculative/3-1.c
index 8f52fe0a4..730823f21 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getcpuclockid/speculative/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getcpuclockid/speculative/3-1.c
@@ -34,7 +34,7 @@ void *thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int rc;
 	clockid_t cid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getschedparam/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getschedparam/1-2.c
index 5a4db4283..559297c39 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getschedparam/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getschedparam/1-2.c
@@ -62,7 +62,7 @@ void *thread_func(void)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getspecific/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getspecific/1-1.c
index 7481f4e8c..8d96f8585 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getspecific/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getspecific/1-1.c
@@ -27,7 +27,7 @@
 #define NUM_OF_KEYS 10
 #define KEY_VALUE 0
 
-int main()
+int main(void)
 {
 	pthread_key_t keys[NUM_OF_KEYS];
 	int i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getspecific/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getspecific/3-1.c
index 44f145340..52837695d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_getspecific/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_getspecific/3-1.c
@@ -23,7 +23,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_key_t key;
 	void *rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/1-1.c
index 4a9c27b41..d6e54ead9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/1-1.c
@@ -41,7 +41,7 @@ static void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/1-2.c
index 480d300ac..b95b4eb81 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/1-2.c
@@ -66,7 +66,7 @@ static void *threaded(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	pthread_t child;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/2-1.c
index cdf86dae3..1e9ea6cc6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/2-1.c
@@ -42,7 +42,7 @@ static void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	void *value_ptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/3-1.c
index 2f65074b0..9e208b5bb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/3-1.c
@@ -72,7 +72,7 @@ thread_exit_failure:
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/4-1.c
index d7a61e614..8f953760f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/4-1.c
@@ -78,7 +78,7 @@ void *joiner_func(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	pthread_t child;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/5-1.c
index 9794918f8..e41a26db5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/5-1.c
@@ -28,7 +28,7 @@ static void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/6-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/6-2.c
index b82b6fae8..3c6dddf6f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/6-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/6-2.c
@@ -42,7 +42,7 @@ static void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/6-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/6-3.c
index e5c510c13..daac11edf 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/6-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/6-3.c
@@ -164,7 +164,7 @@ static void *test(void *arg)
 	return NULL;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/speculative/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/speculative/6-1.c
index b84173028..0a48139e0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/speculative/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_join/speculative/6-1.c
@@ -41,7 +41,7 @@ static void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	pthread_attr_t attr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/1-1.c
index 922c789ba..3861df9dd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/1-1.c
@@ -31,7 +31,7 @@
 
 pthread_key_t keys[NUM_OF_KEYS];
 
-int main()
+int main(void)
 {
 	int i;
 	void *rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/1-2.c
index 1c08d3903..f77573a22 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/1-2.c
@@ -42,7 +42,7 @@ void *a_thread_func()
 	pthread_exit(0);
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	void *value_ptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/2-1.c
index 73bc6efa6..f150f3443 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/2-1.c
@@ -23,7 +23,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_key_t key;
 	void *rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/3-1.c
index 52a045800..ac96bd6f2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/3-1.c
@@ -51,7 +51,7 @@ void *a_thread_func()
 	pthread_exit(0);
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/speculative/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/speculative/5-1.c
index 5079d32df..b2183d54d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/speculative/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_create/speculative/5-1.c
@@ -36,7 +36,7 @@
 
 pthread_key_t keys[PTHREAD_KEYS_MAX];
 
-int main()
+int main(void)
 {
 	int i, rc;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/1-1.c
index be2c3206a..791d0f988 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/1-1.c
@@ -30,7 +30,7 @@
 
 #define NUM_OF_KEYS 10
 
-int main()
+int main(void)
 {
 	pthread_key_t keys[NUM_OF_KEYS];
 	int i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/1-2.c
index 1917b0c25..d5e341ee4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/1-2.c
@@ -31,7 +31,7 @@
 #define NUM_OF_KEYS 10
 #define KEY_VALUE 100
 
-int main()
+int main(void)
 {
 	pthread_key_t keys[NUM_OF_KEYS];
 	int i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/2-1.c
index 63a125980..94734e5d3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_key_delete/2-1.c
@@ -53,7 +53,7 @@ void *a_thread_func()
 	pthread_exit(0);
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/1-1.c
index b3ccfb352..dfddaa1d4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/1-1.c
@@ -75,7 +75,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/1-2.c
index cad281e29..bc359c4da 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/1-2.c
@@ -109,7 +109,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/2-1.c
index 03073fc04..88b3a805a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/2-1.c
@@ -18,7 +18,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_t main_thread;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/3-1.c
index fff6e0bf4..c54863f6b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/3-1.c
@@ -16,7 +16,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_t main_thread;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/6-1.c
index 512617194..bed43b210 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/6-1.c
@@ -30,7 +30,7 @@ void *thread_function(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t child_thread;
 	pthread_t invalid_tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/7-1.c
index 009cf65ff..721d17a51 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/7-1.c
@@ -18,7 +18,7 @@
 #include <sys/types.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_t main_thread;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/8-1.c
index c57a99c1e..7bcf50247 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_kill/8-1.c
@@ -206,7 +206,7 @@ void *test(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/1-1.c
index 6eaddb4ba..3a86b3fa8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/1-1.c
@@ -18,7 +18,7 @@
 pthread_mutex_t mutex1, mutex2;
 pthread_mutex_t mutex3 = PTHREAD_MUTEX_INITIALIZER;
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/2-1.c
index 63dfb8506..b89ca30d2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/2-1.c
@@ -14,7 +14,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/2-2.c
index 80684af9f..f39d77b18 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/2-2.c
@@ -103,7 +103,7 @@ struct _scenar {
 #define NSCENAR (sizeof(scenarii)/sizeof(scenarii[0]))
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	int i, j;
@@ -227,7 +227,7 @@ int main(int argc, char *argv[])
 }
 
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/3-1.c
index 625d627df..9ce4ca105 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/3-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/5-1.c
index 9cdd29086..96c9ec1d7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/5-1.c
@@ -15,7 +15,7 @@
 
 pthread_mutex_t mutex;
 
-int main()
+int main(void)
 {
 	int rc;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/5-2.c
index 839d4c463..601a51779 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/5-2.c
@@ -104,7 +104,7 @@ struct _scenar {
 #define NSCENAR (sizeof(scenarii)/sizeof(scenarii[0]))
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	int i;
@@ -217,7 +217,7 @@ int main(int argc, char *argv[])
 }
 
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/speculative/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/speculative/4-2.c
index 4ebfd8f17..68a0b660f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/speculative/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_destroy/speculative/4-2.c
@@ -26,7 +26,7 @@
 #define FUNCTION "pthread_mutex_destroy"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/1-1.c
index 0ee20c161..10987e307 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/1-1.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	pthread_mutex_t mutex1, mutex2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/1-2.c
index 405589ffa..f826ceba3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/1-2.c
@@ -166,7 +166,7 @@ void *unlock_issue(void *arg)
 }
 
 /***** main program *****/
-int main(int argc, char *argv[])
+int main(void)
 {
 	pthread_mutex_t mtx_null, mtx_def;
 	pthread_mutexattr_t mattr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/2-1.c
index 47c1fd3d9..226ddaa70 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/2-1.c
@@ -16,7 +16,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/3-1.c
index aca935472..de0bf7888 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/3-1.c
@@ -22,7 +22,7 @@ typedef struct my_data {
 
 my_data_t data = { PTHREAD_MUTEX_INITIALIZER, 0 };
 
-int main()
+int main(void)
 {
 	printf("Test PASSED\n");
 	return PTS_PASS;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/3-2.c
index 8d016ae9c..1a8266a99 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/3-2.c
@@ -172,7 +172,7 @@ void *unlock_issue(void *arg)
 }
 
 /***** main program *****/
-int main(int argc, char *argv[])
+int main(void)
 {
 	pthread_mutex_t mtx_null, mtx_macro = PTHREAD_MUTEX_INITIALIZER;
 	pthread_t thr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/4-1.c
index fa9a529e1..d7b4f204e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/4-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	pthread_mutex_t mutex;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/5-1.c
index 5f2609db4..dfa73d194 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/5-1.c
@@ -82,7 +82,7 @@
 /***********************************    Test case   *****************************************/
 /********************************************************************************************/
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	pid_t child;
 
@@ -246,7 +246,7 @@ int main(int argc, char *argv[])
 }
 
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/speculative/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/speculative/5-2.c
index cd1bc4ffd..7deb828fc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/speculative/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_init/speculative/5-2.c
@@ -82,7 +82,7 @@
 /********************************************************************************************/
 /***********************************    Test case   *****************************************/
 /********************************************************************************************/
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	struct utsname un;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/1-1.c
index 48de89314..6fab15020 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/1-1.c
@@ -35,7 +35,7 @@ void *f1(void *parm);
 pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 int value;			/* value protected by mutex */
 
-int main()
+int main(void)
 {
 	int i, rc;
 	pthread_attr_t pta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/2-1.c
index 6bfdef748..7e8827c4a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/2-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/3-1.c
index 797f09a2f..c4d09facf 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/3-1.c
@@ -281,7 +281,7 @@ void *threaded(void *arg)
 }
 
 /* At last (but not least) we need a main */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/4-1.c
index caa83a260..797212d04 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/4-1.c
@@ -138,7 +138,7 @@ void *threaded(void *arg)
 }
 
 /** parent thread function **/
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	int i;
@@ -260,7 +260,7 @@ int main(int argc, char *argv[])
 	PASSED;
 }
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/5-1.c
index 4cb8e69a0..38505db86 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_lock/5-1.c
@@ -140,7 +140,7 @@ void *threaded(void *arg)
 }
 
 /********* main ********/
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i, j;
 	pthread_t th;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/1-1.c
index c9ac5b0d0..cffd4319b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/1-1.c
@@ -46,7 +46,7 @@ struct timeval currsec1, currsec2;	/* Variables for saving time before
  * MAIN()
  *
  * *************************/
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	struct timeval time_diff;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/2-1.c
index b5011cc07..46f659c1f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/2-1.c
@@ -49,7 +49,7 @@ struct timeval currsec1, currsec2;	/* Variables for saving time before
  * MAIN()
  *
  * *************************/
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	struct timeval time_diff;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/4-1.c
index 9869f678b..43129e7d3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/4-1.c
@@ -41,7 +41,7 @@ time_t currsec1, currsec2;	/* Variables for saving time before
  * MAIN()
  *
  * *************************/
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-1.c
index b4009a4d3..f8375e6aa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-1.c
@@ -49,7 +49,7 @@ time_t currsec1, currsec2;	/* Variables for saving time before
  * MAIN()
  *
  * *************************/
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-2.c
index 94bbca756..f2505e5e8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-2.c
@@ -49,7 +49,7 @@ time_t currsec1, currsec2;	/* Variables for saving time before
  * MAIN()
  *
  * *************************/
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-3.c
index a0bffe225..a8332af05 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_timedlock/5-3.c
@@ -45,7 +45,7 @@ time_t currsec1, currsec2;	/* Variables for saving time before
  * MAIN()
  *
  * *************************/
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/1-1.c
index 78f6f7fdf..1803f2e16 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/1-1.c
@@ -33,7 +33,7 @@ pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 int t1_start = 0;
 int t1_pause = 1;
 
-int main()
+int main(void)
 {
 	int i, rc;
 	pthread_t t1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/1-2.c
index 319024804..adabfa237 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/1-2.c
@@ -154,7 +154,7 @@ void *tf(void *arg)
 }
 
 /* Main entry point. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	int sc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/2-1.c
index 7143ac8a0..f77bda68d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/2-1.c
@@ -131,7 +131,7 @@ void *tf(void *arg)
 }
 
 /* Main entry point. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	int sc;
@@ -435,7 +435,7 @@ int main(int argc, char *argv[])
 }
 
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/3-1.c
index c14efa9e5..32151322d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/3-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-1.c
index 1747953c3..688ccc629 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-1.c
@@ -23,7 +23,7 @@
 
 pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 
-int main()
+int main(void)
 {
 	int rc;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-2.c
index a3b4d96eb..3063b2584 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-2.c
@@ -152,7 +152,7 @@ void *tf(void *arg)
 }
 
 /* Main entry point. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	int sc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-3.c
index f55bdc87f..64c549da4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_trylock/4-3.c
@@ -306,7 +306,7 @@ void *test(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/1-1.c
index bb1a19cf3..db9fcfccd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/1-1.c
@@ -24,7 +24,7 @@
 
 pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 
-int main()
+int main(void)
 {
 	int rc;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/2-1.c
index 6a95408f5..c1562e44a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/2-1.c
@@ -38,7 +38,7 @@ void *func(void *parm);
 pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 int value;			/* value protected by mutex */
 
-int main()
+int main(void)
 {
 	int i, rc;
 	pthread_t threads[THREAD_NUM];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/3-1.c
index 6c941fe92..4053388be 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/3-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/5-1.c
index 99a89a67d..36ddc066f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/5-1.c
@@ -103,7 +103,7 @@ void *threaded(void *arg)
 }
 
 /** parent thread function **/
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_mutexattr_t ma;
@@ -170,7 +170,7 @@ int main(int argc, char *argv[])
 	PASSED;
 }
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/5-2.c
index 08312a698..7a49294e1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutex_unlock/5-2.c
@@ -83,7 +83,7 @@
 /********************************************************************************************/
 
 /** parent thread function **/
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_mutexattr_t ma;
@@ -152,7 +152,7 @@ int main(int argc, char *argv[])
 	PASSED;
 }
 #else /* WITHOUT_XOPEN */
-int main(int argc, char *argv[])
+int main(void)
 {
 	output_init();
 	UNTESTED("This test requires XSI features");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/1-1.c
index 5c34d6705..ea1ecd529 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/1-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/2-1.c
index bc4339f09..476167f7f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/2-1.c
@@ -23,7 +23,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/3-1.c
index c6602dbe6..4107a3224 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/3-1.c
@@ -21,7 +21,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/4-1.c
index bf73fb086..094739030 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_destroy/4-1.c
@@ -20,7 +20,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t *mta = NULL;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/1-1.c
index 34eabfe31..89c80cecf 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/1-1.c
@@ -27,7 +27,7 @@ static void print_pthread_error(const char *fname, int ret)
 	printf("Unexpected error at %s(): %s\n", fname, strerror(ret));
 }
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is prioceiling capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/1-2.c
index cdf4f590a..ab53b3fff 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/1-2.c
@@ -23,7 +23,7 @@
 #include <sched.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is prioceiling capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/3-1.c
index d26d8b850..de2ae3300 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprioceiling/3-1.c
@@ -26,7 +26,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	int prioceiling, ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprotocol/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprotocol/1-1.c
index e573d9d6c..33880f4f1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprotocol/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprotocol/1-1.c
@@ -21,7 +21,7 @@
 #include <sched.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	pthread_mutexattr_t mta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprotocol/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprotocol/1-2.c
index 49484fee6..02c5056b4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprotocol/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getprotocol/1-2.c
@@ -17,7 +17,7 @@
 #include <sched.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	pthread_mutexattr_t mta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-1.c
index 08b5d2780..22ffbc6f5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-1.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-2.c
index c7e3fd5e4..a9eb82250 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-2.c
@@ -22,7 +22,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-3.c
index 96d9ce3c3..984410476 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/1-3.c
@@ -22,7 +22,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/3-1.c
index 7efb5c1c5..0046c9924 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_getpshared/3-1.c
@@ -23,7 +23,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-1.c
index 39e5c532d..f5fc5f014 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-1.c
@@ -25,7 +25,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int type;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-2.c
index 88e814cee..ddeef9410 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-2.c
@@ -26,7 +26,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int type;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-3.c
index f1bf3550a..2c87c711e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-3.c
@@ -26,7 +26,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int type;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-4.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-4.c
index a7173d810..84b007c0d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-4.c
@@ -26,7 +26,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int type;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-5.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-5.c
index 8e0601d1d..b762b5a30 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/1-5.c
@@ -26,7 +26,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int type;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/speculative/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/speculative/3-1.c
index b630a76fe..684c64de7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/speculative/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_gettype/speculative/3-1.c
@@ -26,7 +26,7 @@
 #include "posixtest.h"
 #include <errno.h>
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int type, ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_init/1-1.c
index 62b863679..c9abce9c3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_init/1-1.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_init/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_init/3-1.c
index 766dd7b96..edc06781f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_init/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_init/3-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/1-1.c
index 83118b392..a8973757c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/1-1.c
@@ -22,7 +22,7 @@
 #include <sched.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is prioceiling capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/3-1.c
index 8c98e8096..fb7ac1ab9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/3-1.c
@@ -24,7 +24,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is prioceiling capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/3-2.c
index 1e432ee01..b93a1bde4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprioceiling/3-2.c
@@ -24,7 +24,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is prioceiling capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/1-1.c
index 02eeee3eb..9d7fc0c8d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/1-1.c
@@ -21,7 +21,7 @@
 #include <sched.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	pthread_mutexattr_t mta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/3-1.c
index 4af9ba94b..566b38e5c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/3-1.c
@@ -21,7 +21,7 @@
 
 #define INVALID_PROTOCOL -1
 
-int main()
+int main(void)
 {
 
 	pthread_mutexattr_t mta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/3-2.c
index a73f6ab7a..8912503af 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setprotocol/3-2.c
@@ -20,7 +20,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	pthread_mutexattr_t mta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/1-1.c
index 18352e8e4..4bbeb9599 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/1-1.c
@@ -39,7 +39,7 @@
 
 pthread_mutex_t new_mutex;	/* The mutex. */
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/1-2.c
index d9adb6909..9112208e1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/1-2.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/2-1.c
index ab36b2073..d22c5db85 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/2-1.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/2-2.c
index 24f0e2798..edc43f87c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/2-2.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/3-1.c
index 321872d50..49b16d0fd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/3-1.c
@@ -23,7 +23,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/3-2.c
index d47f6049d..bdaccb571 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_setpshared/3-2.c
@@ -26,7 +26,7 @@
 
 #define INVALID_PSHARED_VALUE -1
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/1-1.c
index e53cc2560..a7b694487 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/1-1.c
@@ -18,7 +18,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int type;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/2-1.c
index 6b176d056..9871c0f9f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/2-1.c
@@ -39,7 +39,7 @@ void alarm_handler(int signo)
 	exit(PTS_PASS);
 }
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 	pthread_mutexattr_t mta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-1.c
index 208e0b4fd..cac20f1c5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-1.c
@@ -29,7 +29,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 	pthread_mutexattr_t mta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-2.c
index 677733402..a9f30465f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-2.c
@@ -44,7 +44,7 @@ void *a_thread_func()
 	pthread_exit((void *)0);
 }
 
-int main()
+int main(void)
 {
 
 	/* Initialize a mutex attributes object */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-3.c
index d33a79acd..0c7a44519 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-3.c
@@ -29,7 +29,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 	pthread_mutexattr_t mta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-4.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-4.c
index ced3d1f91..b13bc2a8c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/3-4.c
@@ -29,7 +29,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutex_t mutex;
 	pthread_mutexattr_t mta;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/7-1.c
index 570c4929a..72af96594 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_mutexattr_settype/7-1.c
@@ -27,7 +27,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_mutexattr_t mta;
 	int ret;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-1.c
index 7504f6cc8..48d6e5534 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-1.c
@@ -35,7 +35,7 @@ void an_init_func(void)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-2.c
index 9b0b49a5e..f2fa99ff3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-2.c
@@ -86,7 +86,7 @@ void my_init(void)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-3.c
index 7f6cf4fa7..daaf7b4cd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/1-3.c
@@ -115,7 +115,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/2-1.c
index dbed99291..559204436 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/2-1.c
@@ -86,7 +86,7 @@ void my_init(void)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/3-1.c
index a63fca57c..34709ae44 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/3-1.c
@@ -66,7 +66,7 @@ void *an_init_func2()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	init_flag = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/6-1.c
index f35e9526a..304b5b099 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_once/6-1.c
@@ -214,7 +214,7 @@ void *test(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_destroy/1-1.c
index afbb10714..e312b44d6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_destroy/1-1.c
@@ -21,7 +21,7 @@
 
 #define COUNT 1000
 
-int main()
+int main(void)
 {
 	pthread_rwlock_t rwlock;
 	int cnt = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_destroy/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_destroy/3-1.c
index a4515c75e..9921cc738 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_destroy/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_destroy/3-1.c
@@ -21,7 +21,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_rwlock_t rwlock;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/1-1.c
index 046f442a8..749716bdb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/1-1.c
@@ -51,7 +51,7 @@ static void *fn_rd(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/2-1.c
index 0eeb11baa..bbe887ae3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/2-1.c
@@ -51,7 +51,7 @@ static void *fn_rd(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/3-1.c
index f994581ec..ba6fabd1c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/3-1.c
@@ -27,7 +27,7 @@
 
 static pthread_rwlock_t rwlock;
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	pthread_rwlockattr_t rwlockattr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/6-1.c
index 709a032b3..2d358a854 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_init/6-1.c
@@ -24,7 +24,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	static pthread_rwlock_t rwlock;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/1-1.c
index 8cc74ef4e..b394b382f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/1-1.c
@@ -69,7 +69,7 @@ static void *fn_rd(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	pthread_t rd_thread1, rd_thread2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-1.c
index e948cdf0a..c6c141297 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-1.c
@@ -134,7 +134,7 @@ static void *fn_wr(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 #ifndef _POSIX_THREAD_PRIORITY_SCHEDULING
 	printf("Posix Thread Execution Scheduling not supported\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-2.c
index c0c716847..01f9de277 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-2.c
@@ -134,7 +134,7 @@ static void *fn_wr(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 #ifndef _POSIX_THREAD_PRIORITY_SCHEDULING
 	printf("Posix Thread Execution Scheduling not supported\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-3.c
index adf2b0499..786ffb1e5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-3.c
@@ -134,7 +134,7 @@ static void *fn_wr(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 #ifndef _POSIX_THREAD_PRIORITY_SCHEDULING
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/4-1.c
index ee9ce25ca..54310052d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/4-1.c
@@ -87,7 +87,7 @@ static void *th_fn(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt;
 	handler_called = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/5-1.c
index f26928a79..6bec6c34a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/5-1.c
@@ -24,7 +24,7 @@
 
 #define COUNT 10
 
-int main()
+int main(void)
 {
 
 	static pthread_rwlock_t rwlock;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/1-1.c
index bb6a544b9..a1f47665b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/1-1.c
@@ -85,7 +85,7 @@ static void *fn_rd(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	pthread_t rd_thread1, rd_thread2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/2-1.c
index 435770a2f..c51b4cc04 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/2-1.c
@@ -85,7 +85,7 @@ static void *fn_rd(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	pthread_t thread1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/3-1.c
index 7b70c08c8..82a16f25f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/3-1.c
@@ -99,7 +99,7 @@ static void *fn_rd(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	pthread_t rd_thread1, rd_thread2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/5-1.c
index e7e21ffba..0f1920d8a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/5-1.c
@@ -128,7 +128,7 @@ static void *fn_rd_2(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/6-1.c
index 3a9e698fb..6ff51e03f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/6-1.c
@@ -106,7 +106,7 @@ static void *th_fn(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt;
 	struct timeval wait_time;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/6-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/6-2.c
index 8803a1f30..a82c5254a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/6-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedrdlock/6-2.c
@@ -121,7 +121,7 @@ static void *th_fn(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/1-1.c
index 8943fc930..6f32d2a28 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/1-1.c
@@ -89,7 +89,7 @@ static void *fn_wr(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	pthread_t thread0, thread1, thread2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/3-1.c
index 0352bafa9..da202b1d6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/3-1.c
@@ -109,7 +109,7 @@ static void *fn_wr(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	pthread_t thread0, thread1, thread2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/5-1.c
index ef4b6a61d..ffd91d985 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/5-1.c
@@ -134,7 +134,7 @@ static void *fn_wr_2(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/6-1.c
index a8fe21b21..43161d768 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/6-1.c
@@ -106,7 +106,7 @@ static void *th_fn(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt;
 	struct timeval time_diff;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/6-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/6-2.c
index 1aee27e3b..8b74bc9a3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/6-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_timedwrlock/6-2.c
@@ -121,7 +121,7 @@ static void *th_fn(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_tryrdlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_tryrdlock/1-1.c
index 0fae57ec0..6a7df797c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_tryrdlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_tryrdlock/1-1.c
@@ -84,7 +84,7 @@ static void *fn_rd_2(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_trywrlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_trywrlock/1-1.c
index 8812f0bf5..72eeddc7f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_trywrlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_trywrlock/1-1.c
@@ -61,7 +61,7 @@ static void *fn_wr(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_trywrlock/speculative/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_trywrlock/speculative/3-1.c
index 797adfe80..73813766f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_trywrlock/speculative/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_trywrlock/speculative/3-1.c
@@ -21,7 +21,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	static pthread_rwlock_t rwlock;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/1-1.c
index d2ccfa30b..46b0803f8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/1-1.c
@@ -104,7 +104,7 @@ static void *fn_rd(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/2-1.c
index bf47533a1..c8f7d8ba6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/2-1.c
@@ -65,7 +65,7 @@ static void *fn_wr(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/3-1.c
index be3dcdf12..a47ebda56 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/3-1.c
@@ -181,7 +181,7 @@ static void *fn_wr_2(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 #ifndef _POSIX_THREAD_PRIORITY_SCHEDULING
 	printf("Posix Thread Execution Scheduling not supported\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/4-1.c
index a85ce7ceb..d94866433 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/4-1.c
@@ -27,7 +27,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	static pthread_rwlock_t rwlock;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/4-2.c
index 922908005..734aeceb1 100755
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_unlock/4-2.c
@@ -51,7 +51,7 @@ static void *fn_unlk(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/1-1.c
index 4bd46b91f..097ecb882 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/1-1.c
@@ -69,7 +69,7 @@ static void *fn_wr(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 	pthread_t thread1, thread2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/2-1.c
index 80f685666..0b48d13fa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/2-1.c
@@ -88,7 +88,7 @@ static void *th_fn(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/3-1.c
index 2f945ccab..8e0ef806e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_wrlock/3-1.c
@@ -25,7 +25,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	static pthread_rwlock_t rwlock;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_destroy/1-1.c
index 8edbb5c0f..84299bfeb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_destroy/1-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_rwlockattr_t rwla;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_destroy/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_destroy/2-1.c
index 85814a4f5..ad59db185 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_destroy/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_destroy/2-1.c
@@ -22,7 +22,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_rwlockattr_t rwla;
 	int rc = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/1-1.c
index 892921906..229349dc8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/1-1.c
@@ -19,7 +19,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_rwlockattr_t rwla;
 	int pshared;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/2-1.c
index 015274af8..d79b7756c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/2-1.c
@@ -39,7 +39,7 @@ struct shmstruct {
 	int data;
 } *rwlock_data;
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/4-1.c
index 75e29c220..37303a7f0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_getpshared/4-1.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_rwlockattr_t rwla;
 	int pshared;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_init/1-1.c
index 01b263ed3..abee8e8de 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_init/1-1.c
@@ -21,7 +21,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_rwlockattr_t rwa;
 	int rc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_init/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_init/2-1.c
index acbb3fbe2..332b8b22e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_init/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_init/2-1.c
@@ -22,7 +22,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_rwlockattr_t rwa;
 	pthread_rwlock_t rwl1, rwl2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_setpshared/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_setpshared/1-1.c
index d9bd9dca7..e4002584d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_setpshared/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlockattr_setpshared/1-1.c
@@ -21,7 +21,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pthread_rwlockattr_t rwla;
 	int pshared;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_self/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_self/1-1.c
index 9babad096..7bcbb653c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_self/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_self/1-1.c
@@ -33,7 +33,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/1-1.c
index 80c715220..fdcf44770 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/1-1.c
@@ -63,7 +63,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/1-2.c
index 3ca9da9b2..ca980b5aa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/1-2.c
@@ -62,7 +62,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/2-1.c
index 5ea67b3bc..3f4afdbc6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/2-1.c
@@ -58,7 +58,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/3-1.c
index 8552cc2d9..27b3486e6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcancelstate/3-1.c
@@ -37,7 +37,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/1-1.c
index 74a15ecbb..5ca86b7ca 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/1-1.c
@@ -74,7 +74,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int i = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/1-2.c
index ca4bfaf4e..75f8935e3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/1-2.c
@@ -83,7 +83,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/2-1.c
index b4644be4d..c19e65ad5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setcanceltype/2-1.c
@@ -78,7 +78,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/1-1.c
index 291cdec7e..ded12184b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/1-1.c
@@ -43,7 +43,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/1-2.c
index c95ae4e51..6e80d464e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/1-2.c
@@ -150,7 +150,7 @@ void *changer(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	pthread_t tcontrol, tchange;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/4-1.c
index c673758ab..75d955fd3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/4-1.c
@@ -155,7 +155,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	pthread_t child;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/5-1.c
index 6b1327b53..d96be0b6e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedparam/5-1.c
@@ -197,7 +197,7 @@ void *test(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2, me;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedprio/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedprio/1-1.c
index d40e24ff9..7f076449a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedprio/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setschedprio/1-1.c
@@ -69,7 +69,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setspecific/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setspecific/1-1.c
index bbdcc68c8..b0527fa7d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setspecific/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setspecific/1-1.c
@@ -28,7 +28,7 @@
 #define NUM_OF_KEYS 10
 #define KEY_VALUE 0
 
-int main()
+int main(void)
 {
 	pthread_key_t keys[NUM_OF_KEYS];
 	int i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setspecific/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setspecific/1-2.c
index b9e8b626c..053910f47 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_setspecific/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_setspecific/1-2.c
@@ -54,7 +54,7 @@ void *a_thread_func()
 
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/10-1.c
index cbec4f98f..934450fcc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/10-1.c
@@ -50,7 +50,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/12-1.c
index a0fc2a1ce..d1bc49c3b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/12-1.c
@@ -113,7 +113,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/14-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/14-1.c
index 0a6a63a38..44de2284b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/14-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/14-1.c
@@ -41,7 +41,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/15-1.c
index dc507aeeb..f52e6f0d6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/15-1.c
@@ -15,7 +15,7 @@
 #include <signal.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	sigset_t set;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/16-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/16-1.c
index 45a1d2ec5..8cfb35be9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/16-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/16-1.c
@@ -58,7 +58,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/18-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/18-1.c
index a9c3704a2..084bc20ff 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/18-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/18-1.c
@@ -221,7 +221,7 @@ void *test(void *arg)
 }
 
 /* Main function */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t th_work, th_sig1, th_sig2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/4-1.c
index 3aad55606..c27cf779f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/4-1.c
@@ -102,7 +102,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/5-1.c
index ec91b48ea..23729e72e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/5-1.c
@@ -112,7 +112,7 @@ void *a_thread_func()
 
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/6-1.c
index b1ab62bc9..a87d069c6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/6-1.c
@@ -123,7 +123,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/7-1.c
index 471fb99b1..adb819448 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/7-1.c
@@ -75,7 +75,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-1.c
index 729a2c866..01acf04ef 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-1.c
@@ -76,7 +76,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-2.c
index 8adc43dc9..8e555d0e9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-2.c
@@ -77,7 +77,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-3.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-3.c
index 85d6db0dd..bff16d01f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/8-3.c
@@ -76,7 +76,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/9-1.c
index 6773b6604..7cdd3c168 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_sigmask/9-1.c
@@ -89,7 +89,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 
 	int *thread_return_value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_destroy/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_destroy/1-1.c
index 8e380bf45..e46a21c61 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_destroy/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_destroy/1-1.c
@@ -27,7 +27,7 @@
 
 static pthread_spinlock_t spinlock;
 
-int main()
+int main(void)
 {
 	int rc = 0;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_destroy/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_destroy/3-1.c
index 895efa276..dc10886af 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_destroy/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_destroy/3-1.c
@@ -49,7 +49,7 @@ static void *fn_chld(void *arg)
 	exit(PTS_PASS);
 }
 
-int main()
+int main(void)
 {
 	pthread_t child_thread;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/1-1.c
index 8c4c6b726..8f9b192fe 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/1-1.c
@@ -29,7 +29,7 @@
 
 static pthread_spinlock_t spinlock;
 
-int main()
+int main(void)
 {
 	int rc = 0;
 	int pshared;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/2-1.c
index 5c7cbd205..2b83de558 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/2-1.c
@@ -37,7 +37,7 @@ struct shmstruct {
 	int data;
 } *spinlock_data;
 
-int main()
+int main(void)
 {
 
 	/* Make sure there is process-shared capability. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/2-2.c
index 8635b5760..b68adaed0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/2-2.c
@@ -45,7 +45,7 @@ struct shmstruct {
 	int data;
 } *spinlock_data;
 
-int main()
+int main(void)
 {
 
 	int pshared;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/4-1.c
index 169292e17..0ee36395c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_init/4-1.c
@@ -50,7 +50,7 @@ static void *fn_chld(void *arg)
 	exit(PTS_PASS);
 }
 
-int main()
+int main(void)
 {
 	int rc = 0;
 	pthread_t child_thread;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-1.c
index 022210f85..c6117ba79 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-1.c
@@ -95,7 +95,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t child_thread;
 	void *value_ptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-2.c
index a6f87fb79..b19202e78 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/1-2.c
@@ -66,7 +66,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/3-1.c
index b78e71642..5196f8a7b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/3-1.c
@@ -32,7 +32,7 @@ static void sig_handler()
 	pthread_exit((void *)PTS_PASS);
 }
 
-int main()
+int main(void)
 {
 	int rc;
 	pthread_spinlock_t spinlock;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/3-2.c
index 12d63bf5b..7ec1a7a48 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_lock/3-2.c
@@ -40,7 +40,7 @@ static void sig_handler()
 	exit(PTS_PASS);
 }
 
-int main()
+int main(void)
 {
 	pthread_spinlock_t spinlock;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_trylock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_trylock/1-1.c
index a4b87b85c..43399ad53 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_trylock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_trylock/1-1.c
@@ -72,7 +72,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t child_thread;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_trylock/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_trylock/4-1.c
index dacccf452..5a69732bb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_trylock/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_trylock/4-1.c
@@ -23,7 +23,7 @@
 #include <string.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	pthread_spinlock_t spinlock;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/1-1.c
index a10d4f59b..58cf33e9a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/1-1.c
@@ -62,7 +62,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int rc;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/1-2.c
index 934fc20a5..98482c84d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/1-2.c
@@ -67,7 +67,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int cnt = 0;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/3-1.c
index 5079da9d3..fce841c63 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_spin_unlock/3-1.c
@@ -73,7 +73,7 @@ static void *fn_chld(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int rc;
 	pthread_t child_thread;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_testcancel/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_testcancel/1-1.c
index f9ef73915..654b054df 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_testcancel/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_testcancel/1-1.c
@@ -83,7 +83,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/pthread_testcancel/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/pthread_testcancel/2-1.c
index a2909d9aa..e02b79553 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/pthread_testcancel/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/pthread_testcancel/2-1.c
@@ -58,7 +58,7 @@ void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/raise/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/raise/1-1.c
index 306bdc385..ee8909ba4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/raise/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/raise/1-1.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/raise/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/raise/1-2.c
index f41553d91..1b112f388 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/raise/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/raise/1-2.c
@@ -44,7 +44,7 @@ void childhandler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	struct sigaction parentact;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/raise/10000-1.c b/testcases/open_posix_testsuite/conformance/interfaces/raise/10000-1.c
index 162c98ee9..6d4f98331 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/raise/10000-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/raise/10000-1.c
@@ -56,7 +56,7 @@ void handler(int signo)
 	printf("Caught signal being tested!\n");
 }
 
-int main()
+int main(void)
 {
 	int i;
 	int failure = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/raise/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/raise/2-1.c
index bb23baf63..b1dededc8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/raise/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/raise/2-1.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	globalStatus = LEAVINGHANDLER;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/raise/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/raise/4-1.c
index 5fa61f13f..9fa4f96d5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/raise/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/raise/4-1.c
@@ -34,7 +34,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/raise/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/raise/6-1.c
index a686a4a6c..512dce8f1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/raise/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/raise/6-1.c
@@ -17,7 +17,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	if (raise(10000) == 0) {
 		printf("Incorrectly returned 0\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/raise/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/raise/7-1.c
index 27323dae1..96985b6f7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/raise/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/raise/7-1.c
@@ -18,7 +18,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	if (raise(10000) == 0) {
 		printf("Incorrectly returned 0\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-1.c
index 14cec077e..03d28a48d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-1.c
@@ -16,7 +16,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-2.c
index 480a54d6d..640198a0a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-2.c
@@ -16,7 +16,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-3.c
index bf48aaf0a..df43d3ef9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-3.c
@@ -19,7 +19,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)||defined(_POSIX_THREAD_SPORADIC_SERVER)&&(_POSIX_THREAD_SPORADIC_SERVER != -1)
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
@@ -40,7 +40,7 @@ int main(int argc, char **argv)
 	return PTS_UNRESOLVED;
 }
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-4.c
index 0e6f75e94..d1b28a2f4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/1-4.c
@@ -16,7 +16,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/2-1.c
index a9ee897f3..584a39d61 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_max/2-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-1.c
index b097c3f8b..9f4841d37 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-1.c
@@ -16,7 +16,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-2.c
index fd2f374c3..e9a16367a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-2.c
@@ -16,7 +16,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-3.c
index 9d8c6c9f0..184ee7f74 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-3.c
@@ -19,7 +19,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)||defined(_POSIX_THREAD_SPORADIC_SERVER)&&(_POSIX_THREAD_SPORADIC_SERVER != -1)
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
@@ -40,7 +40,7 @@ int main(int argc, char **argv)
 	return PTS_UNRESOLVED;
 }
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-4.c
index d84ad0c04..b8e7f99f2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/1-4.c
@@ -16,7 +16,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/2-1.c
index a51005f9a..40cb00def 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_get_priority_min/2-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/1-1.c
index 57f4be01a..df2963a44 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/1-1.c
@@ -17,7 +17,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	struct sched_param param;
 	int result = -1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/2-1.c
index 624de435f..c41910338 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/2-1.c
@@ -17,7 +17,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 
 	struct sched_param param0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/3-1.c
index 28c2beb89..6e89b0dce 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/3-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/4-1.c
index 1723aa3bb..9c594ad08 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/4-1.c
@@ -21,7 +21,7 @@
 #include <sys/wait.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/6-1.c
index 5b61169ad..c27695d13 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/6-1.c
@@ -68,7 +68,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/speculative/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/speculative/7-1.c
index 9115e604d..ab1eae7a1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/speculative/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getparam/speculative/7-1.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/1-1.c
index 827dceec6..d764ffb12 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/1-1.c
@@ -17,7 +17,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 
 	int result0 = -1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/3-1.c
index 1916ac94f..be283980d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/3-1.c
@@ -40,7 +40,7 @@ struct unique {
 	0, 0}
 };
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 	struct unique *tst;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/4-1.c
index 1b941c328..fa9eaf0eb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/4-1.c
@@ -16,7 +16,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/5-1.c
index 6e6f3acdc..a5d0e8c03 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/5-1.c
@@ -21,7 +21,7 @@
 #include <sys/wait.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 
 	int result = -1, child_pid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/7-1.c
index 1aa822be4..04a43b326 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_getscheduler/7-1.c
@@ -51,7 +51,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main(int argc, char **argv)
+int main(void)
 {
 
 	int result = -1;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/1-1.c
index 2784a859b..28ef9eba6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/1-1.c
@@ -18,7 +18,7 @@
 #include "posixtest.h"
 #include <time.h>
 
-int main(int argc, char **argv)
+int main(void)
 {
 
 	struct timespec interval0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/2-1.c
index 98cff86c4..0b29586ab 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/2-1.c
@@ -16,7 +16,7 @@
 #include "posixtest.h"
 #include <time.h>
 
-int main(int argc, char **argv)
+int main(void)
 {
 	struct timespec interval;
 	int result = -2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/3-1.c
index ae7021114..75fc5a0a5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/3-1.c
@@ -22,7 +22,7 @@
 #include "posixtest.h"
 #include <time.h>
 
-int main(int argc, char **argv)
+int main(void)
 {
 
 	struct timespec interval;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/speculative/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/speculative/5-1.c
index e9e6e7891..bbc25e325 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/speculative/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_rr_get_interval/speculative/5-1.c
@@ -20,7 +20,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int result = -2;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/1-1.c
index ceba8cee2..8674e2fc6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/1-1.c
@@ -41,7 +41,7 @@ void child_proc()
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	int result, child_pid, tmp_errno, policy;
 	int min_priority, new_priority, old_priority;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/2-1.c
index ea37807e6..485eeab21 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/2-1.c
@@ -119,7 +119,7 @@ void sigterm_handler(int signum)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	int child_count, i;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/2-2.c
index 035c4ae20..15fc6f86f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/2-2.c
@@ -119,7 +119,7 @@ void sigterm_handler(int signum)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	int child_count, i;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/20-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/20-1.c
index efa19dbf0..947368459 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/20-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/20-1.c
@@ -27,7 +27,7 @@ void *runner(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int new_priority, max_priority, policy, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/21-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/21-1.c
index 457607249..9ef83198e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/21-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/21-1.c
@@ -27,7 +27,7 @@ void *runner(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int new_priority, max_priority, old_policy, policy, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/21-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/21-2.c
index 645dd6107..c7e126419 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/21-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/21-2.c
@@ -27,7 +27,7 @@ void *runner(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int new_priority, max_priority, policy, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/22-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/22-1.c
index 86ba53113..3c68b8fd9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/22-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/22-1.c
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-1.c
index 5813916e5..b6a8f56c6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-1.c
@@ -16,7 +16,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int policy, invalid_priority, old_priority;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-2.c
index 707de0a23..c80798b4b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-2.c
@@ -22,7 +22,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER) && (_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int policy, invalid_priority, old_priority;
 	struct sched_param param;
@@ -71,7 +71,7 @@ int main()
 }
 
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-3.c
index 1da98405d..8ecabf360 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-3.c
@@ -20,7 +20,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int old_priority;
 	struct sched_param param;
@@ -56,7 +56,7 @@ int main()
 }
 
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-4.c
index 241af6c8b..d5392679b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-4.c
@@ -20,7 +20,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int old_priority;
 	struct sched_param param;
@@ -51,7 +51,7 @@ int main()
 }
 
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-5.c
index 26c4af756..5e020c637 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-5.c
@@ -20,7 +20,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int old_priority;
 	struct sched_param param;
@@ -51,7 +51,7 @@ int main()
 }
 
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-6.c
index 4b5e1cbc2..6643d75d1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-6.c
@@ -52,7 +52,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int old_priority;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-7.c
index eed3deb2b..b5cf923e8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/23-7.c
@@ -19,7 +19,7 @@
 #include <sys/wait.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	struct sched_param param;
 	int child_pid, stat_loc, old_priority;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-1.c
index 161443277..26037048b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-1.c
@@ -17,7 +17,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int policy, invalid_priority, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-2.c
index f4464aba6..b5d98981d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-2.c
@@ -23,7 +23,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int policy, invalid_priority, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-3.c
index 855a83473..1d4f8b604 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-3.c
@@ -22,7 +22,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int policy, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-4.c
index 40eb0ec1b..c3936292a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/25-4.c
@@ -21,7 +21,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int policy, result;
 	int result_code = PTS_PASS;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/26-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/26-1.c
index ca99674df..d62ecc081 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/26-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/26-1.c
@@ -50,7 +50,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/27-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/27-1.c
index a93e74c49..dca15fa2b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/27-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/27-1.c
@@ -22,7 +22,7 @@
 #include <sys/wait.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	struct sched_param param;
 	int result, child_pid, stat_loc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/5-1.c
index 7e1743d14..32a3e74dc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setparam/5-1.c
@@ -17,7 +17,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int result, new_priority, old_priority, max_prio, policy;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/1-1.c
index 13845f822..04234dd44 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/1-1.c
@@ -39,7 +39,7 @@ struct unique {
 	0, 0}
 };
 
-int main(int argc, char **argv)
+int main(void)
 {
 	int tmp, policy, priority, result = PTS_PASS;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/15-1.c
index fae5db943..9afda3e1d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/15-1.c
@@ -27,7 +27,7 @@ void *runner(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int new_policy, policy, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/15-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/15-2.c
index 47ada8664..1fe16c84e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/15-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/15-2.c
@@ -27,7 +27,7 @@ void *runner(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int new_priority, max_priority, policy, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/16-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/16-1.c
index 4d319d4f4..73dcce305 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/16-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/16-1.c
@@ -22,7 +22,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int result, old_policy, new_policy;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-1.c
index 34ab85b8f..99cc96a07 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-1.c
@@ -42,7 +42,7 @@ struct unique {
 	0, 0}
 };
 
-int main()
+int main(void)
 {
 	int policy, invalid_priority, result = PTS_PASS;
 	int old_priority, old_policy, new_policy;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-2.c
index 8cba7eab8..54bbbe4dd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-2.c
@@ -28,7 +28,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int invalid_priority;
 	int old_priority, old_policy, new_policy;
@@ -84,7 +84,7 @@ int main()
 
 }
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-3.c
index 61b5a4a0f..4d5dae71b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-3.c
@@ -28,7 +28,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int policy, result;
 	int old_priority, old_policy, new_policy;
@@ -83,7 +83,7 @@ int main()
 
 }
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-4.c
index ed12acffd..9c0a8da89 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-4.c
@@ -28,7 +28,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int max_priority, old_priority, old_policy, new_policy;
 	struct sched_param param;
@@ -81,7 +81,7 @@ int main()
 
 }
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-6.c
index 05bc1109a..b0698e626 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-6.c
@@ -58,7 +58,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int max_priority, old_priority, old_policy, new_policy, policy;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-7.c
index b2d9f9551..ee886f8ec 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-7.c
@@ -28,7 +28,7 @@
 #include <sys/wait.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int max_priority, old_priority, old_policy, new_policy, policy;
 	int child_pid, stat_loc;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-1.c
index 7ea980141..5f2a54331 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-1.c
@@ -37,7 +37,7 @@ struct unique {
 	0, 0}
 };
 
-int main()
+int main(void)
 {
 	int policy, invalid_priority, tmp, result = PTS_PASS;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-2.c
index 026678fec..c83cd8845 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-2.c
@@ -22,7 +22,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int invalid_priority, result;
 	struct sched_param param;
@@ -55,7 +55,7 @@ int main()
 	}
 }
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-3.c
index 8646381c7..c4d784e03 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-3.c
@@ -23,7 +23,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int policy, result;
 	struct sched_param param;
@@ -59,7 +59,7 @@ int main()
 	return PTS_FAIL;
 }
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-4.c
index 9e02d7af4..0713c34b7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-4.c
@@ -24,7 +24,7 @@
 
 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1)
 
-int main()
+int main(void)
 {
 	int policy, result;
 	int result_code = PTS_PASS;
@@ -82,7 +82,7 @@ int main()
 
 }
 #else
-int main()
+int main(void)
 {
 	printf("Does not support SS (SPORADIC SERVER)\n");
 	return PTS_UNSUPPORTED;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-5.c
index 260dadb4a..da3d950f6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/19-5.c
@@ -26,7 +26,7 @@
 /* There is no chance that a scheduling policy has such a value */
 #define INVALID_POLICY -27367
 
-int main()
+int main(void)
 {
 	int result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/20-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/20-1.c
index af614b667..449d8766d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/20-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/20-1.c
@@ -57,7 +57,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/21-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/21-1.c
index cae0adef0..b1b3cf67e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/21-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/21-1.c
@@ -22,7 +22,7 @@
 #include <sys/wait.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int result, child_pid, stat_loc;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/22-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/22-1.c
index f5b365112..1e82b76c9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/22-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/22-1.c
@@ -27,7 +27,7 @@ void *runner(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int new_policy, policy, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/22-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/22-2.c
index 0b99d2c91..546e6f2ec 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/22-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/22-2.c
@@ -27,7 +27,7 @@ void *runner(void *arg)
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	int new_priority, max_priority, policy, result;
 	struct sched_param param;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/4-1.c
index d4aa46ad1..674a55414 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/4-1.c
@@ -17,7 +17,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int result, new_priority, old_priority, max_prio;
 	int old_policy, new_policy, test_policy;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sched_yield/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sched_yield/2-1.c
index 012c8356d..3a4a75b6b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sched_yield/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sched_yield/2-1.c
@@ -14,7 +14,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	if (sched_yield() == 0) {
 		printf("Test PASSED\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_close/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_close/1-1.c
index e414da974..20313bcc4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_close/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_close/1-1.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_close"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_close/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_close/2-1.c
index 273b73a87..6150a34a7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_close/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_close/2-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_close"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_close/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_close/3-1.c
index 8cd47576d..7c90f1414 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_close/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_close/3-1.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_close"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_close/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_close/3-2.c
index 0e5b21a83..60fa98b50 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_close/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_close/3-2.c
@@ -87,7 +87,7 @@
 /******************************************************************************/
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, value;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_destroy/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_destroy/3-1.c
index d954b5085..6e1644821 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_destroy/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_destroy/3-1.c
@@ -28,7 +28,7 @@
 sem_t psem, csem;
 int n;
 
-int main()
+int main(void)
 {
 	pthread_t prod, cons;
 	void *producer(void *);
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_destroy/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_destroy/4-1.c
index a2fd97760..f651b0fcc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_destroy/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_destroy/4-1.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_destroy"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_getvalue/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_getvalue/2-2.c
index 095241ec8..7c9f547ac 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_getvalue/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_getvalue/2-2.c
@@ -93,7 +93,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, val;
 	sem_t sem;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/1-1.c
index 422d99a62..f96b9a06f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/1-1.c
@@ -24,7 +24,7 @@ and then check the value of the semaphore.
 #define FUNCTION "sem_init"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	int sts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/2-1.c
index 292b505cf..ee96db93a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/2-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_init"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	int val;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/2-2.c
index ae2d82155..fe3b1156d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/2-2.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_init"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	int val;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-1.c
index aa8258804..1392bc650 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-1.c
@@ -28,7 +28,7 @@
 sem_t psem, csem;
 int n;
 
-int main()
+int main(void)
 {
 	pthread_t prod, cons;
 	void *producer(void *);
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-2.c
index 6976cc402..b1585362f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-2.c
@@ -86,7 +86,7 @@
 /******************************************************************************/
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, status;
 	pid_t child, ctl;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-3.c
index 49a08698e..efd927bf3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/3-3.c
@@ -86,7 +86,7 @@
 /******************************************************************************/
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, status;
 	pid_t child, ctl;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/5-1.c
index a3cf4754d..2c198f27d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/5-1.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_init"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/5-2.c
index 5f2f8ff67..69939a8f1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/5-2.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_init"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/6-1.c
index 7e56caaf7..266212fed 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/6-1.c
@@ -22,7 +22,7 @@
 #define FUNCTION "sem_init"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	int counter = SEM_VALUE_MAX;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/7-1.c
index 5e01da05b..86ba80bcd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_init/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_init/7-1.c
@@ -79,7 +79,7 @@
 /******************************************************************************/
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	sem_t *sems;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-1.c
index 8f099b35e..b77b23f94 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-1.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-2.c
index c134dae87..c8b929796 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-2.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-3.c
index 0cf597d19..9c1acac20 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-3.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-4.c
index 98763627e..5f424ba1c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/1-4.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/10-1.c
index f862b4a89..6d211d0d2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/10-1.c
@@ -25,7 +25,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/15-1.c
index 43a3ccdb6..0fcf1d8f1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/15-1.c
@@ -82,7 +82,7 @@
 /******************************************************************************/
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	char *name = "/sem_open_15_1";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/2-1.c
index 56d259b48..c40ec601c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/2-1.c
@@ -26,7 +26,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/2-2.c
index 334867175..950db3959 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/2-2.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/3-1.c
index 11a3d0e1e..d7b9fdb6d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/3-1.c
@@ -58,7 +58,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/4-1.c
index ce4789ca3..a190efc70 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/4-1.c
@@ -25,7 +25,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/5-1.c
index d707cc76d..e31605676 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/5-1.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/6-1.c
index e8e2d873e..25eab96f6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_open/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_open/6-1.c
@@ -22,7 +22,7 @@
 #define FUNCTION "sem_open"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[50];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/1-1.c
index 1d93a292c..f61150b3d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/1-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_post"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/1-2.c
index 2afbf7928..5c6425b47 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/1-2.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_post"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/2-1.c
index d3981c5b5..4829382c4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/2-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_post"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/4-1.c
index a56d37428..c1902d3ad 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/4-1.c
@@ -22,7 +22,7 @@
 #define FUNCTION "sem_post"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/5-1.c
index cc16c435e..cad4fe65e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/5-1.c
@@ -40,7 +40,7 @@ void sighdl(int sig)
 	return;
 }
 
-int main()
+int main(void)
 {
 	char semname[28];
 	int val;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/6-1.c
index c887fad06..7b7569bd4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_post/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_post/6-1.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	char semname[28];
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/1-1.c
index fe8283207..ee641c4b0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/1-1.c
@@ -26,7 +26,7 @@
 #define FUNCTION "sem_timedwait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/10-1.c
index bb9088f79..505085c91 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/10-1.c
@@ -29,7 +29,7 @@
 
 #define SLEEP_SEC 1
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	struct timespec ts, ts_2;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/11-1.c
index 7818ea3dd..aec28df31 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/11-1.c
@@ -30,7 +30,7 @@
 #define FUNCTION "sem_timedwait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp[2];
 	struct timespec ts[2];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/2-1.c
index 848a3cd8d..228b3d82e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/2-1.c
@@ -27,7 +27,7 @@
 #define FUNCTION "sem_timedwait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/2-2.c
index 2319c16ab..86836fa9a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/2-2.c
@@ -29,7 +29,7 @@
 #define FUNCTION "sem_timedwait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/3-1.c
index 847748451..915344315 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/3-1.c
@@ -30,7 +30,7 @@
 #define FUNCTION "sem_timedwait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/4-1.c
index bff2a08ee..66ddb433f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/4-1.c
@@ -26,7 +26,7 @@
 #define FUNCTION "sem_timedwait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/6-1.c
index 02ee118fc..032e74c57 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/6-1.c
@@ -27,7 +27,7 @@
 #define FUNCTION "sem_timedwait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/6-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/6-2.c
index e6fad1462..4b358636a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/6-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/6-2.c
@@ -29,7 +29,7 @@
 
 #define NANOSEC 1000000000
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/7-1.c
index f994d365e..11cd26c80 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/7-1.c
@@ -31,7 +31,7 @@
 #define FUNCTION "sem_timedwait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/9-1.c
index c59613428..554cf2c3e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_timedwait/9-1.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	printf("In handler\n");
 }
 
-int main()
+int main(void)
 {
 	sem_t mysemp;
 	struct timespec ts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/1-1.c
index 62eefb100..521047fff 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/1-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_unlink"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/2-1.c
index 8a9532523..1fdda8120 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/2-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_unlink"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/2-2.c
index cd4dc5407..15745dc1c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/2-2.c
@@ -126,7 +126,7 @@ sem_t *common()
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, status;
 	pid_t p1, p2, p3, ctl;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/3-1.c
index 983e12587..965033b52 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/3-1.c
@@ -127,7 +127,7 @@ int set_nonroot()
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, status;
 	pid_t ch, ctl;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/4-1.c
index a659ca2ea..ad5576457 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/4-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_unlink"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/4-2.c
index 44d3dd1ec..f70ef7457 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/4-2.c
@@ -81,7 +81,7 @@
 /******************************************************************************/
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/5-1.c
index 66f36f08e..71300f2cb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/5-1.c
@@ -88,7 +88,7 @@
 /******************************************************************************/
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, error;
 	sem_t *sem;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/6-1.c
index 09ac143e1..86fe39c47 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/6-1.c
@@ -83,7 +83,7 @@
 /******************************************************************************/
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, value;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/7-1.c
index 490050c7d..3515c1669 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/7-1.c
@@ -96,7 +96,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t thread;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/9-1.c
index 7ad0781f7..55dfb1428 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_unlink/9-1.c
@@ -103,7 +103,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	pthread_t child;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/1-1.c
index cfb90ff41..50f4a7148 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/1-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_wait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/1-2.c
index 69446395a..ad2e47519 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/1-2.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_wait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/11-1.c
index e16b3e428..34848d9c9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/11-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_trywait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/12-1.c
index 09c21e0c3..5daea50ad 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/12-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_trywait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/13-1.c
index 1f4dade91..2704697d6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/13-1.c
@@ -61,7 +61,7 @@ static void handler(int sig)
 	}
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret;
 	struct timespec ts_ref, ts_fin;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/3-1.c
index 56476cfda..4565112c1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/3-1.c
@@ -24,7 +24,7 @@
 #define FUNCTION "sem_wait"
 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/5-1.c
index 100fef8e5..ed5086e4d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/5-1.c
@@ -23,7 +23,7 @@
 #define FUNCTION "sem_trywait"
 #define ERROR_PREFIX "unexpected errno: " FUNCTION " " TEST ": "
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/7-1.c
index 8f741b5b6..7c3a445eb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sem_wait/7-1.c
@@ -32,7 +32,7 @@ void handler(int signo)
 	printf("In handler\n");
 }
 
-int main()
+int main(void)
 {
 	sem_t *mysemp;
 	char semname[28];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/1-1.c
index 25c44cd29..595ed92dd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/1-1.c
@@ -35,7 +35,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_1-1"
 
-int main()
+int main(void)
 {
 	int fd;
 	char str[BUF_SIZE] = "qwerty";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/11-1.c
index f50711cf1..521f60e55 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/11-1.c
@@ -21,7 +21,7 @@
 
 #define SHM_NAME "posixtest_11-1"
 
-int main()
+int main(void)
 {
 	int fd, flags;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/13-1.c
index db4869474..db7b8ba05 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/13-1.c
@@ -29,7 +29,7 @@
 #define SHM_NAME "posixtest_13-1"
 #define BUF_SIZE 8
 
-int main()
+int main(void)
 {
 	int fd, result;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/14-2.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/14-2.c
index ee43de5b2..c1f2af05b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/14-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/14-2.c
@@ -35,7 +35,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_14-2"
 
-int main()
+int main(void)
 {
 	int fd;
 	char str[BUF_SIZE] = "qwerty";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/15-1.c
index 818a37d4f..c2897589e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/15-1.c
@@ -26,7 +26,7 @@
 
 #define SHM_NAME "posixtest_15-1"
 
-int main()
+int main(void)
 {
 	int fd, result;
 	struct stat stat_buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/16-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/16-1.c
index 088e70c14..a17ef6300 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/16-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/16-1.c
@@ -24,7 +24,7 @@
 
 #define SHM_NAME "posixtest_16-1"
 
-int main()
+int main(void)
 {
 	int fd, result;
 	struct stat stat_buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/17-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/17-1.c
index f29068898..77b9b84d2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/17-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/17-1.c
@@ -24,7 +24,7 @@
 
 #define SHM_NAME "posixtest_17-1"
 
-int main()
+int main(void)
 {
 	int fd, result;
 	struct stat stat_buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/18-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/18-1.c
index f4b1c7d0c..55b81b2ee 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/18-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/18-1.c
@@ -36,7 +36,7 @@
 #define ALL_MOD_FLAGS (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | \
 		       S_IROTH | S_IWOTH)	/* rw?rw?rw? */
 
-int main()
+int main(void)
 {
 	int fd, result;
 	struct stat stat_buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-1.c
index 8e83f7190..f3760ab72 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-1.c
@@ -29,7 +29,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_20-1"
 
-int main()
+int main(void)
 {
 	int fd, result;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-2.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-2.c
index 1ab5cc2f3..21258825d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-2.c
@@ -29,7 +29,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_20-2"
 
-int main()
+int main(void)
 {
 	int fd, result;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-3.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-3.c
index 74e3c3ddc..5da4698d9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/20-3.c
@@ -29,7 +29,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_20-3"
 
-int main()
+int main(void)
 {
 	int fd, result;
 	void *ptr;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/21-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/21-1.c
index 8d4a0bbf8..1db09ca13 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/21-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/21-1.c
@@ -22,7 +22,7 @@
 
 #define SHM_NAME "posixtest_21-1"
 
-int main()
+int main(void)
 {
 	int fd, result;
 	struct stat stat_buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/22-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/22-1.c
index c1dc615b1..1c9280207 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/22-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/22-1.c
@@ -21,7 +21,7 @@
 
 #define SHM_NAME "posixtest_22-1"
 
-int main()
+int main(void)
 {
 	int fd;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/23-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/23-1.c
index d42c074de..40d7a19c4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/23-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/23-1.c
@@ -79,7 +79,7 @@ int child_func(void)
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int i, pid, result_fd;
 	char semname[20];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/25-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/25-1.c
index ab61a261d..cc7001c77 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/25-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/25-1.c
@@ -31,7 +31,7 @@
 #define SHM_NAME "posixtest_25-1"
 #define SHM_SZ 16
 
-int main()
+int main(void)
 {
 	int fd;
 	struct stat stat_buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/26-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/26-1.c
index 497187354..c7e23fe56 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/26-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/26-1.c
@@ -27,7 +27,7 @@
 #define CREATION_MODE S_IRUSR|S_IWUSR
 #define OPEN_MODE     S_IRGRP
 
-int main()
+int main(void)
 {
 	int fd;
 	struct stat stat_buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/26-2.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/26-2.c
index 3f2b5de55..b91d2e71c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/26-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/26-2.c
@@ -36,7 +36,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_26-2"
 
-int main()
+int main(void)
 {
 	int fd;
 	struct stat stat_buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-1.c
index 8507158ff..0a0cccc71 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-1.c
@@ -35,7 +35,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_28-1"
 
-int main()
+int main(void)
 {
 	int fd;
 	char str[BUF_SIZE] = "qwerty";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-2.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-2.c
index 3b9accadf..16b8dc615 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-2.c
@@ -35,7 +35,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_28-2"
 
-int main()
+int main(void)
 {
 	int fd;
 	char str[BUF_SIZE] = "qwerty";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-3.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-3.c
index ae35d10c6..62615d6b8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/28-3.c
@@ -36,7 +36,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_28-3"
 
-int main()
+int main(void)
 {
 	int fd;
 	char str[BUF_SIZE] = "qwerty";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/32-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/32-1.c
index b1d468dbc..1f542fbec 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/32-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/32-1.c
@@ -58,7 +58,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int fd;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/34-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/34-1.c
index 5d0b809e1..f40204455 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/34-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/34-1.c
@@ -58,7 +58,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int fd;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/37-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/37-1.c
index e2e8ace77..9bb0adcdc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/37-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/37-1.c
@@ -37,7 +37,7 @@ char *shm_name[] = {
 	NULL
 };
 
-int main()
+int main(void)
 {
 	int fd, i = 0, result = PTS_PASS;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/38-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/38-1.c
index 511a7de33..63f1e39ae 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/38-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/38-1.c
@@ -20,7 +20,7 @@
 
 #define SHM_NAME "posixtest_38-1"
 
-int main()
+int main(void)
 {
 	int fd = 0, count = 0;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/39-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/39-1.c
index df8d22318..6f58299ba 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/39-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/39-1.c
@@ -21,7 +21,7 @@
 #include <stdlib.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int fd, i;
 	long name_max;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/39-2.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/39-2.c
index 3f6920307..79cfd2157 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/39-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/39-2.c
@@ -27,7 +27,7 @@
 /* Ensure that each component length is short enough */
 #define COMPONENT_SIZE _POSIX_NAME_MAX
 
-int main()
+int main(void)
 {
 	int fd, i, path_max;
 	char *shm_name;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/41-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/41-1.c
index a00555c47..4b180676e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/41-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/41-1.c
@@ -20,7 +20,7 @@
 
 #define SHM_NAME "posixtest_41-1"
 
-int main()
+int main(void)
 {
 	int fd, result;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/5-1.c
index eedaf7b29..f427a45a4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/5-1.c
@@ -74,7 +74,7 @@ int child_process()
 	return PTS_PASS;
 }
 
-int main()
+int main(void)
 {
 	int fd, child_pid;
 	char *buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/8-1.c
index 19ff9070f..dd1846029 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_open/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_open/8-1.c
@@ -33,7 +33,7 @@
 
 #define SHM_NAME "posixtest_8-1"
 
-int main()
+int main(void)
 {
 	int fd1, fd2;
 	char path[25] = "/tmp/posixtestXXXXXX";
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/1-1.c
index 6f8c612b7..bdb69f03f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/1-1.c
@@ -21,7 +21,7 @@
 
 #define SHM_NAME "posixtest_1-1"
 
-int main()
+int main(void)
 {
 	int fd;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/10-1.c
index c6352bf14..8b51dedb9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/10-1.c
@@ -20,7 +20,7 @@
 #include <stdlib.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int result, i;
 	long name_max;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/10-2.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/10-2.c
index 22dacc42f..bbd4d7cca 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/10-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/10-2.c
@@ -27,7 +27,7 @@
 /* Ensure that each component length is short enough */
 #define COMPONENT_SIZE _POSIX_NAME_MAX
 
-int main()
+int main(void)
 {
 	int result, i, path_max;
 	char *shm_name;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/11-1.c
index 274ad362c..1d92e44f4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/11-1.c
@@ -18,7 +18,7 @@
 
 #define SHM_NAME "posixtest_11-1"
 
-int main()
+int main(void)
 {
 	int result;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/2-1.c
index 5ddc1ad08..6f9d42020 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/2-1.c
@@ -21,7 +21,7 @@
 
 #define SHM_NAME "posixtest_2-1"
 
-int main()
+int main(void)
 {
 	int fd;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/3-1.c
index 544a85024..a9840d250 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/3-1.c
@@ -28,7 +28,7 @@
 #define BUF_SIZE 8
 #define SHM_NAME "posixtest_3-1"
 
-int main()
+int main(void)
 {
 	int fd;
 	char *buf;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/5-1.c
index 96ced1ae4..1ad5c7a3f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/5-1.c
@@ -21,7 +21,7 @@
 
 #define SHM_NAME "posixtest_5-1"
 
-int main()
+int main(void)
 {
 	int fd;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/6-1.c
index 29067ae90..9b137c139 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/6-1.c
@@ -18,7 +18,7 @@
 
 #define SHM_NAME "posixtest_6-1"
 
-int main()
+int main(void)
 {
 	int fd;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/8-1.c
index 65f6d99d4..a924c9409 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/8-1.c
@@ -34,7 +34,7 @@
 #define SHM_NAME "posixtest_9-1"
 #define BUF_SIZE 8
 
-int main()
+int main(void)
 {
 	int fd, result;
 	struct passwd *pw;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/9-1.c
index 59bc83018..756515310 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/shm_unlink/9-1.c
@@ -33,7 +33,7 @@
 
 #define SHM_NAME "posixtest_9-1"
 
-int main()
+int main(void)
 {
 	int fd, result;
 	struct passwd *pw;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-1.c
index 3bc1fab80..42bddd534 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-1.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-10.c
index 28686047c..fe3f0f64a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-10.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-11.c
index e9d86b24b..dbf5674e2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-11.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-12.c
index 0eb2f041b..dd6367d56 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-12.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-13.c
index 788b33827..1d8a42908 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-13.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-14.c
index 716ae6527..0cfe18b79 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-14.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-15.c
index e3c8698c7..b2a59e81d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-15.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-16.c
index ba522603a..3972fac64 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-16.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-17.c
index 2c9192251..25aedd0c8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-17.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-18.c
index af56fd184..008ed3e9e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-18.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-19.c
index d16ec4d84..4cf2bb571 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-19.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-2.c
index af56fd184..008ed3e9e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-2.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-20.c
index 6ad4a7a5e..4062655b7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-20.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-21.c
index dd330bc90..c2b59c5e1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-21.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-22.c
index 24aed301d..a063064e9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-22.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-23.c
index 066a2a51b..7ad06c919 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-23.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-24.c
index 3cdd39b68..b804ef5d8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-24.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-25.c
index b2f4751b4..39e313aaf 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-25.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-26.c
index 9cbd8e194..739ed4ad2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-26.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-3.c
index 288319522..174ce48f2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-3.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-4.c
index 1ff9bfa27..243437f56 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-4.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-5.c
index 5b4bfd804..eb0cb77ae 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-5.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-6.c
index 2c8af86ca..4e3e787b5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-6.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-7.c
index d161f2769..72d9b253e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-7.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-8.c
index 65d55d9d6..700df1f3b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-8.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-9.c
index bd0d94d1c..1b2922e9b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/1-9.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/11-1.c
index 1efa2e338..804bf9e29 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/11-1.c
@@ -39,7 +39,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	}
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-1.c
index 4dd2ddc23..e05be7286 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-1.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-10.c
index f0a9b8f2b..8852dcef5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-10.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-11.c
index 2cc33d3d8..28d32cdff 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-11.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-12.c
index 154ab2bd0..12e8d28f4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-12.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-13.c
index 062ac5cd9..129c4a959 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-13.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-14.c
index 6fcea0687..134103f13 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-14.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-15.c
index 0f341e8b9..3db5a17ca 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-15.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-16.c
index 88f3b8bac..ffbb67a7a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-16.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-17.c
index 566c4f207..72d56f08a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-17.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-18.c
index 5305f0d48..78a44e435 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-18.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-19.c
index 5305f0d48..78a44e435 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-19.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-2.c
index 5305f0d48..78a44e435 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-2.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-20.c
index e4336548e..e29504289 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-20.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-21.c
index a2d0a489f..312eafeb1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-21.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-22.c
index 62ef8e1fd..24c9b6ee2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-22.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-23.c
index fc1fa24d9..dfcb3708c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-23.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-24.c
index 695cea41d..eb1f17cf2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-24.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-25.c
index 49749cb6c..ec3428cf2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-25.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-26.c
index 674198d6f..10256e018 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-26.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-27.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-27.c
index 153ed19fc..eb9cf3723 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-27.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-27.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-28.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-28.c
index 1d7511365..4cd91deab 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-28.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-28.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-29.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-29.c
index b539b5211..d95a3735e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-29.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-29.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-3.c
index 7cd2aabf1..1b02456df 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-3.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-30.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-30.c
index 29bf82269..060db2198 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-30.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-30.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-31.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-31.c
index d76b5d0d2..95e601b06 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-31.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-31.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-32.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-32.c
index f620208f7..34715460a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-32.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-32.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-33.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-33.c
index 9ccacd891..fda0d8d03 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-33.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-33.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-34.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-34.c
index ab1dee8df..bc2eaac9f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-34.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-34.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-35.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-35.c
index 1ec522067..bb3c4d6e5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-35.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-35.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-36.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-36.c
index 7e82b1b23..c93ce7661 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-36.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-36.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-37.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-37.c
index 6fa3a8a54..1ea095ea6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-37.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-37.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-38.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-38.c
index a66cd4d6e..f5b4e868a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-38.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-38.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-39.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-39.c
index 32f630af5..b46957274 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-39.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-39.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-4.c
index 5160aec8d..1df4fbc20 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-4.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-40.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-40.c
index 772f4fb50..c889aece7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-40.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-40.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-41.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-41.c
index f59187270..d8f203a24 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-41.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-41.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-42.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-42.c
index 243830ff6..ebf74369f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-42.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-42.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-43.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-43.c
index fe4904011..74d6a9c83 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-43.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-43.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-44.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-44.c
index 1d7511365..4cd91deab 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-44.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-44.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-45.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-45.c
index 1d7511365..4cd91deab 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-45.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-45.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-46.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-46.c
index 5c9f4184a..95348b08f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-46.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-46.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-47.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-47.c
index 8fbf830b6..378fe88e5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-47.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-47.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-48.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-48.c
index d18788228..7d32391f0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-48.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-48.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-49.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-49.c
index 7282d98e0..d1cdca8e4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-49.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-49.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-5.c
index 0d2d5b667..75855e9b8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-5.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-50.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-50.c
index f508593f9..d597a73fa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-50.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-50.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-51.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-51.c
index ae0ad34c9..8d0158466 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-51.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-51.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-52.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-52.c
index 26a9f24f4..11de44e6f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-52.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-52.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-6.c
index d98305978..6e269d6bb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-6.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-7.c
index 72b29f10b..bcf4d1607 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-7.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-8.c
index 924477ec8..8c77d2bed 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-8.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-9.c
index 8ff7ca3aa..4a9a2e5e7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/12-9.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-1.c
index 42ace72d9..c8a689e10 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-1.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-10.c
index 66d25d0af..b339bda74 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-10.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-11.c
index c53d96fd6..4e6a28540 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-11.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-12.c
index 92f879115..95ff9388b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-12.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-13.c
index fc164dd74..9fb088b75 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-13.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-14.c
index 1d3910a31..0d09b2ec7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-14.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-15.c
index ac75b6e8f..637bdf100 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-15.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-16.c
index e2d9aaef5..a151c8d28 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-16.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-17.c
index 9b37964ef..26cff5d37 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-17.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-18.c
index ffaf13392..55f89ca83 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-18.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-19.c
index ffaf13392..55f89ca83 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-19.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-2.c
index ffaf13392..55f89ca83 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-2.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-20.c
index e9e5924ea..e1748cda5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-20.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-21.c
index 5708b84ce..9382efbb0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-21.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-22.c
index a8e8e3c82..63252949e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-22.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-23.c
index 7a6f0cda3..418f60e30 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-23.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-24.c
index 2fafdda36..ec3480c02 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-24.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-25.c
index 13d6db6f9..4f5e9b807 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-25.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-26.c
index 46c44cf34..ee76c2718 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-26.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-3.c
index f6a132d65..567cb81a1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-3.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-4.c
index 5f681f8a1..20c21c53e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-4.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-5.c
index 8aa46c309..9f994c6cd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-5.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-6.c
index cf7379597..bf7848bc1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-6.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-7.c
index 8824a48b2..edbf34b75 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-7.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-8.c
index e45d481a8..ab923d0fd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-8.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-9.c
index aa4e386f7..5212e2dab 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/13-9.c
@@ -42,7 +42,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-1.c
index 197cb6885..63300fbb5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-1.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-10.c
index 334b24ea1..751cb8449 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-10.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-11.c
index 918cb5df0..537fbada9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-11.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-12.c
index 595c97f8d..bd83d1290 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-12.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-13.c
index 2b92deb8a..809c59e43 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-13.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-14.c
index 9d7050e10..1a13374ea 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-14.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-15.c
index 5043a37be..5376d0cd4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-15.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-16.c
index 1a055e621..584ed5341 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-16.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-17.c
index 88d357442..29d32c23b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-17.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-18.c
index 499f54b9c..43281b426 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-18.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-19.c
index 1f9052944..b4655ec45 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-19.c
@@ -32,7 +32,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-2.c
index e43dedf1d..49bcd1c50 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-2.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-20.c
index c69bd43e7..a47ba58df 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-20.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-21.c
index c2c09941f..16ae1911b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-21.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-22.c
index 102e32a6b..af70421b8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-22.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-23.c
index 742b87b10..2e39dae27 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-23.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-24.c
index e32107347..d2f2d1e7e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-24.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-25.c
index 584535fb4..c9efad4ae 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-25.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-26.c
index 8317b5e49..fb9ed13d3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-26.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-3.c
index 84a3a0c6d..e31f70bb6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-3.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-4.c
index 034bb228d..acdb93380 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-4.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-5.c
index 166db3baf..ae3cfc3ee 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-5.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-6.c
index c9901a35c..3483e4ad9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-6.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-7.c
index dadbcf81d..318643d01 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-7.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-8.c
index 51f4dfe0c..c3d59f55f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-8.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-9.c
index a4f3ef4c3..ba3b9b5fd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/17-9.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	wakeup++;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct timeval tv;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-1.c
index 123db4914..f0bec0ebb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-1.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-10.c
index 8b9ff3616..f13a31947 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-10.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-11.c
index 77b3fcdf3..b5889e1e0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-11.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-12.c
index 26876c623..5c2de0d85 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-12.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-13.c
index 97f8f7c74..89706f285 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-13.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-14.c
index 4029fbd28..90a630549 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-14.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-15.c
index 3b0658e9c..8a05ea129 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-15.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-16.c
index 8a02c883a..253393b12 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-16.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-17.c
index 316b5202e..adf3cb25e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-17.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-18.c
index debc6681b..e58d72608 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-18.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-19.c
index e52208ce0..affba5a03 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-19.c
@@ -78,7 +78,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-2.c
index 81fc13817..232f64d81 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-2.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-20.c
index 6884e507e..e183d9e7a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-20.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-21.c
index 052e44dbb..1f7d112f4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-21.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-22.c
index f2ff69ec6..74dc5ba84 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-22.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-23.c
index b0faba0aa..e8d72b7f3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-23.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-24.c
index c1d9ef925..081fc369a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-24.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-25.c
index f73665520..c9ac5d0da 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-25.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-26.c
index 062ae1c50..1973c255b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-26.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-3.c
index a8f25ca1c..94705f2b4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-3.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-4.c
index 49d8c6d05..773f77d1b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-4.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-5.c
index 83baba98d..d2f0d13d9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-5.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-6.c
index facf39be7..88b96ae3e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-6.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-7.c
index dac335919..a77829bb6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-7.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-8.c
index ff04d5769..9247e188f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-8.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-9.c
index fba813d0d..706cfbe5a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/18-9.c
@@ -87,7 +87,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-1.c
index 180287912..12dfe272e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-1.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-10.c
index d0526a912..296b31504 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-10.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-11.c
index 8a638739b..65656a99e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-11.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-12.c
index 007fb4379..17c25fe1e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-12.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-13.c
index b1a1002ca..bb757782a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-13.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-14.c
index 880e0a6a0..3128efc81 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-14.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-15.c
index fa8dbe200..ac7d0bf08 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-15.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-16.c
index aa252cb5e..fdf91d076 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-16.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-17.c
index 313bc9934..15a2fe877 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-17.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-18.c
index c0ef759cf..5277ceabe 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-18.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-19.c
index e9971e518..388b9ce1f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-19.c
@@ -83,7 +83,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-2.c
index c01a11bfd..1dedca277 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-2.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-20.c
index 960dd1eed..2dd523bbb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-20.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-21.c
index 6f02fca78..bb16e1c31 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-21.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-22.c
index 9fc58102a..c13f49b39 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-22.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-23.c
index 4d61669c0..e7274dc47 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-23.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-24.c
index 77547c093..f59d7fbac 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-24.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-25.c
index 1a85e110a..8f5cb25f7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-25.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-26.c
index ef121d816..9ff08c035 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-26.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-3.c
index d26e7d2f7..fb098d448 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-3.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-4.c
index 59818005e..ef152a3f9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-4.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-5.c
index e818b83c6..272b2b741 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-5.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-6.c
index 8cea00f79..eb8456b1a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-6.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-7.c
index 372c304cb..c691e176e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-7.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-8.c
index 60d96577e..923157d69 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-8.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-9.c
index 360d204c6..f53d9b3bf 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/19-9.c
@@ -92,7 +92,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-1.c
index 4795bcc72..faec9fc15 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-1.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-10.c
index 98c5b2388..2f7b0f7b5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-10.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-11.c
index 1a9611fa9..c37e857d6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-11.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-12.c
index b359e1aca..35f8a50d9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-12.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-13.c
index 292014eb7..6a0aa1afb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-13.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-14.c
index 240a085c7..7bd01a544 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-14.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-15.c
index b40cf1a60..b05d1e9ea 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-15.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-16.c
index 11eabdf7f..61bedf67b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-16.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-17.c
index 168d6bff4..1c38cf591 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-17.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-18.c
index 30e32eb6e..9f2af051f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-18.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-19.c
index 939a57dad..aa18a805c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-19.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-2.c
index 939a57dad..aa18a805c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-2.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-20.c
index f6b5cdad6..0b3462d93 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-20.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-21.c
index c27795ff5..3ed52d738 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-21.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-22.c
index f34a24b8a..8308599a7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-22.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-23.c
index 9e7fdfd44..e1c10feae 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-23.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-24.c
index adc5da1b7..a0e8e7149 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-24.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-25.c
index 638e6456b..b255618e9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-25.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-26.c
index 02d941285..d8dce84b8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-26.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-3.c
index 2cd7be5fb..787ba5414 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-3.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-4.c
index ecd557ea1..72f0bdaf6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-4.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-5.c
index 2078e6049..ec0655047 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-5.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-6.c
index 25af009f2..0e3b59cb6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-6.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-7.c
index 747886a4b..15afc88ab 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-7.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-8.c
index 1172b5f74..fae7a790c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-8.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-9.c
index cace11ba8..ade249bcb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/2-9.c
@@ -31,7 +31,7 @@ void handler2(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/21-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/21-1.c
index 1b581a332..58d3d229b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/21-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/21-1.c
@@ -19,7 +19,7 @@ void handler(int signo)
 	printf("Caught SIGCHLD\n");
 }
 
-int main()
+int main(void)
 {
 
 	/* Make sure this flag is supported. */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-1.c
index 5a8ede8eb..38e2117a2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-1.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-10.c
index 6805e987a..bebde7ca1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-10.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-11.c
index 0760f68a9..669d03e8a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-11.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-12.c
index c2dd7e4b3..a0908c13f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-12.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-13.c
index dfb3702b6..853ca9c42 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-13.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-14.c
index a2c2adf9b..21f80040c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-14.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-15.c
index 51104f8ff..654bb6726 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-15.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-16.c
index 00b1dc987..991b822fa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-16.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-17.c
index 0cb058deb..2bd32a991 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-17.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-18.c
index 89d9d6316..bc2b69235 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-18.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-19.c
index 89d9d6316..bc2b69235 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-19.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-2.c
index 89d9d6316..bc2b69235 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-2.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-20.c
index 1f7b15da3..2ed66c506 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-20.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-21.c
index be648c956..bdcfff5d3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-21.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-22.c
index 2894a1778..7e124b896 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-22.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-23.c
index e90e6b870..5dfb4a367 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-23.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-24.c
index bb108efe5..3d904efa7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-24.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-25.c
index 7429fe7f6..b91c9aa38 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-25.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-26.c
index d0eadfa58..e0fcd399c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-26.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-3.c
index 9b9c8a649..0990392c0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-3.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-4.c
index 8d2a9a3fe..9ec7cfedd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-4.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-5.c
index 7da3ae715..00113ac8e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-5.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-6.c
index dca3f6345..98d0222af 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-6.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-7.c
index f18fba349..ed0f4a269 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-7.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-8.c
index 50e58faa6..379a6985f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-8.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-9.c
index dc4e70131..72ee42072 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/22-9.c
@@ -59,7 +59,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-1.c
index 10a97e8c2..0a93f261b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-1.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-10.c
index 72145876a..4aa25cddd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-10.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-11.c
index 200bae6e1..cbc3fc15e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-11.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-12.c
index 9740219e2..7c7e4b945 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-12.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-13.c
index 5b78e76a2..ee2ef490a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-13.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-14.c
index 4fb57c09a..c52785d44 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-14.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-15.c
index 8fc62ab46..20f068a91 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-15.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-16.c
index 5b32c6d3b..293bad267 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-16.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-17.c
index 0f3e7df2d..06e31614d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-17.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-18.c
index a01972cbe..091318c6f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-18.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-19.c
index 1d8cdfc4a..e68edc2a1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-19.c
@@ -109,7 +109,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-2.c
index aeb0b0cda..a00cbb2c1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-2.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-20.c
index 807c2cf2d..001b91a0a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-20.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-21.c
index e3afbcf2c..759a8a862 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-21.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-22.c
index c3a8fc482..d3c71f01d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-22.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-23.c
index 107836d5b..d5ed6c738 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-23.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-24.c
index d767185c1..6d6044ffa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-24.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-25.c
index 8a36adf7e..1013e107e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-25.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-26.c
index 6787b0627..b4f76a354 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-26.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-3.c
index dd7d6fcfd..1f46c4191 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-3.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-4.c
index 791a2921c..580b3bd22 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-4.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-5.c
index d240f71dc..2bc5a2ee1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-5.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-6.c
index 43ed4c27d..6c0a9a095 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-6.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-7.c
index cb7894cd1..ead989b5b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-7.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-8.c
index f603d6c5d..a23f4019b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-8.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-9.c
index 54e96b9fd..9a1458ff7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-9.c
@@ -119,7 +119,7 @@ void handler(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-1.c
index f3966ce82..b8051694c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-1.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-10.c
index 263bda942..0ac3a8ff5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-10.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-11.c
index 5fe5621ed..3b6b7cefe 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-11.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-12.c
index d29a0f6a2..bb37ea5c9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-12.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-13.c
index 1b582683f..6eb2d7b13 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-13.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-14.c
index 748db8cc6..31b71ead6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-14.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-15.c
index 2e57d9e3d..31c4f6f20 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-15.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-16.c
index cc89a99a1..20da7c9e3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-16.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-17.c
index 576da60cc..00408fd79 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-17.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-18.c
index c4bf13784..472720ef6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-18.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-19.c
index c4bf13784..472720ef6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-19.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-2.c
index c4bf13784..472720ef6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-2.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-20.c
index 718f15714..3f150371a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-20.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-21.c
index 0a1cc386f..fae146a61 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-21.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-22.c
index 419d9b155..716a9cbc1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-22.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-23.c
index 7b0914ee3..e300dec60 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-23.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-24.c
index f973d45a3..075d60f60 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-24.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-25.c
index 2a10972e6..3204d7fcb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-25.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-26.c
index 7a3b1ead4..faf6d9cbd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-26.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-3.c
index 30aed83d6..814926346 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-3.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-4.c
index 64ed90593..812201263 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-4.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-5.c
index a4ebab7f7..629ff9df7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-5.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-6.c
index bcaaca58f..503f163d5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-6.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-7.c
index e0bc15b00..a74e40a98 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-7.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-8.c
index b071ebfb3..a69ab3cc5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-8.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-9.c
index 533e8c300..2d9c422c5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/25-9.c
@@ -57,7 +57,7 @@ void handler(int signo)
 	inside_handler--;
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-1.c
index 528c27b0c..07c1111d7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-1.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-10.c
index 535819d07..e6ff47463 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-10.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-11.c
index 1608b95d9..41aa34dc0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-11.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-12.c
index 2954a4c24..6478c756c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-12.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-13.c
index 621bac75f..d51f5a4a9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-13.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-14.c
index d9b0a6937..9c9f23091 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-14.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-15.c
index 700b5f290..aa5794ed1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-15.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-16.c
index 52a8ff476..14ee66ef4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-16.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-17.c
index cf0fdac04..124bc5d6c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-17.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-18.c
index c667d3eaf..d98dc07a1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-18.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-19.c
index 17de5fc0a..c9d0e440f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-19.c
@@ -179,7 +179,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-2.c
index 680d6adca..49d59f0bb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-2.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-20.c
index e89dc539e..e4f3cecb0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-20.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-21.c
index 4a0d4ad19..7d5308a07 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-21.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-22.c
index e8a388823..a09025efc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-22.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-23.c
index f4f948803..a651facdd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-23.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-24.c
index f31cec3ae..dcbe7c36e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-24.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-25.c
index 465d5c961..a1391b788 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-25.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-26.c
index 41b1d7aa6..78ac6b588 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-26.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-3.c
index 69ea28006..9c2a53085 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-3.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-4.c
index 0231d6860..59fb40aea 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-4.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-5.c
index f9690c40d..c193b8c66 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-5.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-6.c
index 296a06505..816c520f2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-6.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-7.c
index 7e59c5eb6..14228abd7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-7.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-8.c
index bf1de2462..40e17db12 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-8.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-9.c
index c8cbd0ee7..a4e1f54c5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/28-9.c
@@ -182,7 +182,7 @@ void handler_2(int sig)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/29-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/29-1.c
index 40971aecb..9fb115698 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/29-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/29-1.c
@@ -105,7 +105,7 @@ void handler(int sig, siginfo_t * info, void *context)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-1.c
index e801179e5..22169dd79 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-1.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-10.c
index ec9634e07..b15af2978 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-10.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-11.c
index 9f1516a59..5d356d341 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-11.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-12.c
index d5be5c6be..69b46402e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-12.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-13.c
index 33b69f3fb..be1e8b96a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-13.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-14.c
index a5d775116..c62294e04 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-14.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-15.c
index 92fb71414..6b7463d49 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-15.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-16.c
index 394ebc737..e506b6c90 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-16.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-17.c
index 8d99976ea..ea3654a27 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-17.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-18.c
index aa0ee27c2..6b605116f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-18.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-19.c
index aa0ee27c2..6b605116f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-19.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-2.c
index aa0ee27c2..6b605116f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-2.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-20.c
index 2bb84c240..cc72b5bdf 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-20.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-21.c
index 13f8ff6e9..eb207c156 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-21.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-22.c
index ab096c983..820ca59ab 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-22.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-23.c
index e0e77aae3..1aec32e9b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-23.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-24.c
index 97fda9083..6845e4ec5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-24.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-25.c
index b2c004d81..126520b7f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-25.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-26.c
index 5409e5dd6..9683816a7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-26.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-3.c
index c160d508c..2b3f2aa4c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-3.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-4.c
index 63bcd9cef..1dc12701a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-4.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-5.c
index 305a938f6..6a124ff88 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-5.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-6.c
index d1ba53d8e..30223a0e8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-6.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-7.c
index e6e04886e..9b7eab517 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-7.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-8.c
index edddb693a..64282a3dc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-8.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-9.c
index fb69ad1a7..cee51e4a0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/3-9.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	struct sigaction oact;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/30-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/30-1.c
index 9b7cebd3d..a188ccb1a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/30-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/30-1.c
@@ -88,7 +88,7 @@ void handler(int signo)
 }
 
 /* main function */
-int main()
+int main(void)
 {
 	int ret;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-1.c
index 89dae742f..a49ac99ee 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-1.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-10.c
index 63eb7d8dc..f4f9dee03 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-10.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-100.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-100.c
index 6b9c0a6ae..819763c3d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-100.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-100.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-101.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-101.c
index 6b794547f..fe8cd2bfb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-101.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-101.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-102.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-102.c
index 0e28d4105..3d81d83af 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-102.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-102.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-103.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-103.c
index 3dd4aa671..3d2eb58e9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-103.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-103.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-104.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-104.c
index d8d7d924e..60e4eab5d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-104.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-104.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-11.c
index ff5174847..2d09e00ee 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-11.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-12.c
index 6aac0e526..039c7f04a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-12.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-13.c
index 5da90f68a..caf0e404c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-13.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-14.c
index ef0509bbc..2cdd8989a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-14.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-15.c
index 2fd300a39..e479c8c7a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-15.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-16.c
index bd80778b2..ec09b977e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-16.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-17.c
index ca3b15473..2d838075f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-17.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-18.c
index 3e794285f..3b74cc41f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-18.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-19.c
index 3e794285f..3b74cc41f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-19.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-2.c
index 3e794285f..3b74cc41f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-2.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-20.c
index 546f3fd9c..3eb8c175e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-20.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-21.c
index 5062d5127..ed1b17bb2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-21.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-22.c
index 7906734e2..70a4d78c9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-22.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-23.c
index 1937252f3..77a9f00b6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-23.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-24.c
index 65747ba53..4b886944c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-24.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-25.c
index c5bca916a..dfa276031 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-25.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-26.c
index 856cc8272..1934fa448 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-26.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-27.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-27.c
index 42fd4e6a6..df14ed47b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-27.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-27.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-28.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-28.c
index db893e38e..1f99b52b3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-28.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-28.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-29.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-29.c
index 2bad6ccfc..3032be0b5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-29.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-29.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-3.c
index 84f46c853..8d753bd0c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-3.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-30.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-30.c
index 3e17ac15f..89ba151fc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-30.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-30.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-31.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-31.c
index 1d703b8da..04d3258e8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-31.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-31.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-32.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-32.c
index a60e6c233..795c3b5af 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-32.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-32.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-33.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-33.c
index 5e97eda39..cfc973b4b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-33.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-33.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-34.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-34.c
index 1e9a7abd1..afccb1909 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-34.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-34.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-35.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-35.c
index 378a775cd..640dab2af 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-35.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-35.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-36.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-36.c
index 1f8c9f86f..d3ec7b23c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-36.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-36.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-37.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-37.c
index d97d44eed..00e52a52e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-37.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-37.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-38.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-38.c
index 1cf9cafa7..2bbe7ac87 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-38.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-38.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-39.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-39.c
index e3a76c66c..6c65613aa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-39.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-39.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-4.c
index 24761b5e7..6654257fd 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-4.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-40.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-40.c
index 67038960d..248c534a2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-40.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-40.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-41.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-41.c
index 8759ede78..c4208d55c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-41.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-41.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-42.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-42.c
index ecc38cd56..6e4fbe5ae 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-42.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-42.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-43.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-43.c
index 407d9615e..e6948c7d8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-43.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-43.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-44.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-44.c
index db893e38e..1f99b52b3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-44.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-44.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-45.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-45.c
index db893e38e..1f99b52b3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-45.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-45.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-46.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-46.c
index 97ab2e04d..ea522d251 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-46.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-46.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-47.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-47.c
index 51c39d60c..6773c6889 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-47.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-47.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-48.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-48.c
index 69724bc6f..3a46859d3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-48.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-48.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-49.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-49.c
index 0969a5f37..02b8aa477 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-49.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-49.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-5.c
index fd554cc31..95490c2a0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-5.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-50.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-50.c
index d1eeaa6cd..73d3a2d19 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-50.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-50.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-51.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-51.c
index 387eabb96..0dabf1858 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-51.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-51.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-52.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-52.c
index dd6658a8c..62a9adbe7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-52.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-52.c
@@ -38,7 +38,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	if ((pid = fork()) == 0) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-53.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-53.c
index 31ae40a03..40c138566 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-53.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-53.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-54.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-54.c
index 4c25f6671..3bc2b9fe8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-54.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-54.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-55.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-55.c
index 87706e4ca..6091fc00f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-55.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-55.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-56.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-56.c
index 714cc8aeb..f2d5cec35 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-56.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-56.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-57.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-57.c
index 5d06a66e5..e00f6b6a8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-57.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-57.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-58.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-58.c
index f05df49c0..5502bdca9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-58.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-58.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-59.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-59.c
index b7e8388b4..88ad94ecc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-59.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-59.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-6.c
index 16bd4a30e..3c7c56112 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-6.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-60.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-60.c
index bf21e7ca5..5870618e7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-60.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-60.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-61.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-61.c
index 86da4b02e..1d93d197b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-61.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-61.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-62.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-62.c
index 8960303a4..b73dc0892 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-62.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-62.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-63.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-63.c
index 67466c29b..11c74ae0a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-63.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-63.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-64.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-64.c
index 78e5b9bee..065ef4b18 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-64.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-64.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-65.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-65.c
index 4346f208e..c5345553b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-65.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-65.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-66.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-66.c
index 0e62000a5..b489d885a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-66.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-66.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-67.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-67.c
index 5932a8cd2..2f63665fb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-67.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-67.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-68.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-68.c
index 9454ddb3d..67ae4e83c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-68.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-68.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-69.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-69.c
index ebc11db67..b49dce8d9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-69.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-69.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-7.c
index 3bc518ee1..26381c8d7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-7.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-70.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-70.c
index 57535c0e5..eaa029b1e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-70.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-70.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-71.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-71.c
index 4c25f6671..3bc2b9fe8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-71.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-71.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-72.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-72.c
index 08cee000d..ef823afcc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-72.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-72.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-73.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-73.c
index 1f223ba22..07806ad18 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-73.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-73.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-74.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-74.c
index 8220bf8ee..ada77d22e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-74.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-74.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-75.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-75.c
index 874f2ea1d..6f4c64179 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-75.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-75.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-76.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-76.c
index 538c54829..c1b516a88 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-76.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-76.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-77.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-77.c
index ac6f648cf..ab248a6e5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-77.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-77.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-78.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-78.c
index 7b6e3fc78..f2da5a6db 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-78.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-78.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-79.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-79.c
index 7cde06142..5664a5dd0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-79.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-79.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-8.c
index c22f01e2c..6f1fc8b13 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-8.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-80.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-80.c
index 2902c6bd5..718473c94 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-80.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-80.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-81.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-81.c
index 2be869d00..2848c8772 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-81.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-81.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-82.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-82.c
index ad1e23bdc..e101dff87 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-82.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-82.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-83.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-83.c
index ee8c6e294..e7eb6b8db 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-83.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-83.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-84.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-84.c
index b12cb368f..227ed05df 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-84.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-84.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-85.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-85.c
index 653c0ee23..ce1953848 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-85.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-85.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-86.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-86.c
index 7f4baaf3d..dcbd6bead 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-86.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-86.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-87.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-87.c
index 495bc6906..c32cdd128 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-87.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-87.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-88.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-88.c
index e57e880fc..03c5d08e1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-88.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-88.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-89.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-89.c
index 793cf04a4..0ac170736 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-89.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-89.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-9.c
index b783b9e94..b4095f4e9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-9.c
@@ -35,7 +35,7 @@ void handler(int signo)
 	exit(0);
 }
 
-int main()
+int main(void)
 {
 	if (fork() == 0) {
 		/* child */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-90.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-90.c
index abd311f5b..239e96c7a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-90.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-90.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-91.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-91.c
index c1fca6e9e..39fe5d698 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-91.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-91.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-92.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-92.c
index a302ea2f2..5d069a0d1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-92.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-92.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-93.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-93.c
index 1ed764b6e..cb9b3f641 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-93.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-93.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-94.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-94.c
index fd44d458c..41eaa195b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-94.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-94.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-95.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-95.c
index 32d43b732..3385b120a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-95.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-95.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-96.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-96.c
index 20e3ecd67..490711622 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-96.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-96.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-97.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-97.c
index 2902c6bd5..718473c94 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-97.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-97.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-98.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-98.c
index 7f9172612..adb9a848c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-98.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-98.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-99.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-99.c
index cc0a201df..e2c7cc0b7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-99.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/4-99.c
@@ -22,7 +22,7 @@ void handler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-1.c
index 95b1f22d5..c7b665dac 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-1.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-10.c
index d6a93ba77..6928ac658 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-10.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-11.c
index 58f50bb99..c8fc5a57c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-11.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-12.c
index d98d2319e..fbd11c190 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-12.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-13.c
index 0a9b6756d..44205d219 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-13.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-14.c
index 87e801891..ed330f7b4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-14.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-15.c
index 8ba69e334..1c920c772 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-15.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-16.c
index 4dcc841ec..1428c70d3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-16.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-17.c
index ec354ed84..e274e7729 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-17.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-18.c
index 1e8b913aa..3f9b1cbcb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-18.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-19.c
index 1e8b913aa..3f9b1cbcb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-19.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-2.c
index 1e8b913aa..3f9b1cbcb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-2.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-20.c
index 710a3f998..603716773 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-20.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-21.c
index df92f390c..377d33bff 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-21.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-22.c
index 9fa017f81..7a88f19a8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-22.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-23.c
index 91973ae22..f7cb3edc3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-23.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-24.c
index 5438a1c6b..36a8f7483 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-24.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-25.c
index 762822ed4..b26717c96 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-25.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-26.c
index 8f4642907..a02218254 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-26.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-3.c
index 876b68fc8..711e414b6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-3.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-4.c
index b867c0e3a..ff990cc3c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-4.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-5.c
index 1d3a025cd..de0e4e7da 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-5.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-6.c
index 297a11b7f..1e4b4a5d8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-6.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-7.c
index 1f7bc0f6b..f78990b0e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-7.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-8.c
index 10218291b..0214f8242 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-8.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-9.c
index c76a75b01..ec1cbdcc9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/6-9.c
@@ -26,7 +26,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-1.c
index 24fa6b94b..828012599 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-1.c
@@ -36,7 +36,7 @@ void SIGABRT_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-10.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-10.c
index dba1c4eac..604199c9c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-10.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-10.c
@@ -36,7 +36,7 @@ void SIGPIPE_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-11.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-11.c
index d6ebc411a..3855b6e33 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-11.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-11.c
@@ -36,7 +36,7 @@ void SIGQUIT_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-12.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-12.c
index 83239921a..049d18cd0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-12.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-12.c
@@ -36,7 +36,7 @@ void SIGSEGV_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-13.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-13.c
index 0bf51bdf5..41a49f498 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-13.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-13.c
@@ -36,7 +36,7 @@ void SIGTERM_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-14.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-14.c
index 5ee4e4e7c..d1800d80f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-14.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-14.c
@@ -36,7 +36,7 @@ void SIGTSTP_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-15.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-15.c
index eaea41755..f144b6570 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-15.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-15.c
@@ -36,7 +36,7 @@ void SIGTTIN_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-16.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-16.c
index 9b3785a18..8a86239f2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-16.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-16.c
@@ -36,7 +36,7 @@ void SIGTTOU_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-17.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-17.c
index f804bbc9c..f380e9353 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-17.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-17.c
@@ -36,7 +36,7 @@ void SIGUSR1_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-18.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-18.c
index c47d53aa0..e4727a041 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-18.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-18.c
@@ -36,7 +36,7 @@ void SIGUSR2_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-19.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-19.c
index a5853382d..533a53ae9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-19.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-19.c
@@ -34,7 +34,7 @@ void SIGUSR1_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-2.c
index 382dc89b7..05d0a898a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-2.c
@@ -36,7 +36,7 @@ void SIGUSR2_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-20.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-20.c
index 41bee07c0..baaba1ce3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-20.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-20.c
@@ -36,7 +36,7 @@ void SIGPROF_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-21.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-21.c
index 8dc033fbf..2d25c00dc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-21.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-21.c
@@ -36,7 +36,7 @@ void SIGSYS_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-22.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-22.c
index 8ed26ea78..622b1cc8b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-22.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-22.c
@@ -36,7 +36,7 @@ void SIGTRAP_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-23.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-23.c
index a2afbcba6..4d6c0872b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-23.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-23.c
@@ -36,7 +36,7 @@ void SIGURG_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-24.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-24.c
index f69ddd396..5d69362de 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-24.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-24.c
@@ -36,7 +36,7 @@ void SIGVTALRM_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-25.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-25.c
index 9d714f262..b2055a55d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-25.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-25.c
@@ -36,7 +36,7 @@ void SIGXCPU_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-26.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-26.c
index f34bc37ca..6c3597c62 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-26.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-26.c
@@ -36,7 +36,7 @@ void SIGXFSZ_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-3.c
index d6b9d292e..05a1fefd3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-3.c
@@ -36,7 +36,7 @@ void SIGBUS_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-4.c
index ddc647b5d..d47ed9a9b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-4.c
@@ -36,7 +36,7 @@ void SIGCHLD_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-5.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-5.c
index b7f1b8219..4c44f9bfb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-5.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-5.c
@@ -36,7 +36,7 @@ void SIGCONT_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-6.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-6.c
index bb8cba903..fc096ba71 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-6.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-6.c
@@ -36,7 +36,7 @@ void SIGFPE_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-7.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-7.c
index 90e78375f..fc6e0bcb1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-7.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-7.c
@@ -36,7 +36,7 @@ void SIGHUP_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-8.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-8.c
index ba2372ef2..73e881355 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-8.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-8.c
@@ -36,7 +36,7 @@ void SIGILL_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-9.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-9.c
index 0ad992f82..20e14535e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-9.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/8-9.c
@@ -36,7 +36,7 @@ void SIGINT_handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/9-1.c
index 6a8350abf..984a0ee0c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaction/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaction/9-1.c
@@ -38,7 +38,7 @@ void handler(int signo, siginfo_t * info, void *context)
 	}
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/1-1.c
index 46f205076..9c46dd657 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/1-1.c
@@ -43,7 +43,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/10-1.c
index bed842fca..7af6185cc 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/10-1.c
@@ -25,7 +25,7 @@ void handler(int signo)
 	printf("Just a dummy handler\n");
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/11-1.c
index 197441bf3..daabdb837 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/11-1.c
@@ -34,7 +34,7 @@ void handler(int signo)
 	printf("Just a dummy handler\n");
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/12-1.c
index 9ad8e36ef..3e42aaaed 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/12-1.c
@@ -34,7 +34,7 @@ void handler(int signo)
 	printf("Just a dummy handler\n");
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/2-1.c
index 06642a042..9fd49eeb7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/2-1.c
@@ -56,7 +56,7 @@ void handler(int signo)
 
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/3-1.c
index e226cdbc2..508533617 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/3-1.c
@@ -58,7 +58,7 @@ void handler(int signo)
 
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/5-1.c
index b4c42fff6..329416639 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/5-1.c
@@ -24,7 +24,7 @@ void handler(int signo)
 	printf("Do nothing useful\n");
 }
 
-int main()
+int main(void)
 {
 
 	stack_t alternate_s, current_s;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/6-1.c
index be4973696..046f287ef 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/6-1.c
@@ -46,7 +46,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/7-1.c
index 0bd201e15..429e58e9b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/7-1.c
@@ -49,7 +49,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/8-1.c
index 2461d35af..6c36f9518 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/8-1.c
@@ -46,7 +46,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/9-1.c
index 3d8b7df67..3f6d11ff7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigaltstack/9-1.c
@@ -37,7 +37,7 @@
 static stack_t a;
 static char path[PATH_MAX + 1];
 
-int main(int argc, char **argv)
+int main(int argc, char *argv[])
 {
 	int rc;
 	char path[PATH_MAX + 1];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigdelset/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigdelset/1-3.c
index ceb9f239c..71e1896a9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigdelset/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigdelset/1-3.c
@@ -17,7 +17,7 @@
 #include <signal.h>
 #include "posixtest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	sigset_t signalset;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigdelset/1-4.c b/testcases/open_posix_testsuite/conformance/interfaces/sigdelset/1-4.c
index 2a4b07828..35a7db223 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigdelset/1-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigdelset/1-4.c
@@ -11,7 +11,7 @@
 #include <signal.h>
 #include "posixtest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	sigset_t signalset;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigemptyset/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigemptyset/1-1.c
index 9bb8dfd35..a75951d28 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigemptyset/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigemptyset/1-1.c
@@ -17,7 +17,7 @@
 
 #define NUMSIGNALS (sizeof(siglist) / sizeof(siglist[0]))
 
-int main()
+int main(void)
 {
 
 	int siglist[] = { SIGABRT, SIGALRM, SIGBUS, SIGCHLD,
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigemptyset/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigemptyset/2-1.c
index 744193ed8..90a099ac9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigemptyset/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigemptyset/2-1.c
@@ -13,7 +13,7 @@
 #include <signal.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	sigset_t signalset;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigfillset/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigfillset/2-1.c
index 083a59dee..27fac03c8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigfillset/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigfillset/2-1.c
@@ -12,7 +12,7 @@
 #include <signal.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	sigset_t signalset;
 /*
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/signal/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/signal/1-1.c
index ca909b1a5..9ae66033d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/signal/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/signal/1-1.c
@@ -30,7 +30,7 @@ void myhandler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	if (signal(SIGCHLD, myhandler) == SIG_ERR) {
 		perror("Unexpected error while using signal()");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/signal/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/signal/2-1.c
index d4ddac556..5603f7428 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/signal/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/signal/2-1.c
@@ -29,7 +29,7 @@ void myhandler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	if (signal(SIGCHLD, myhandler) == SIG_ERR) {
 		perror("Unexpected error while using signal()");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/signal/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/signal/3-1.c
index bd16e05d1..c9931669f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/signal/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/signal/3-1.c
@@ -27,7 +27,7 @@ void myhandler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	if (signal(SIGCHLD, myhandler) == SIG_ERR) {
 		perror("Unexpected error while using signal()");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/signal/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/signal/5-1.c
index 8b3332924..a897b6f4c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/signal/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/signal/5-1.c
@@ -32,7 +32,7 @@ void SIGUSR2_handler(int signo)
 	printf("do nothing useful\n");
 }
 
-int main()
+int main(void)
 {
 	if (signal(SIGUSR1, SIGUSR1_handler) == SIG_ERR) {
 		perror("Unexpected error while using signal()");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/signal/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/signal/6-1.c
index 8b0169e22..74259f355 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/signal/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/signal/6-1.c
@@ -22,7 +22,7 @@ void myhandler(int signo)
 	printf("handler does nothing useful.\n");
 }
 
-int main()
+int main(void)
 {
 	errno = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/signal/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/signal/7-1.c
index a2a8a1d73..e813d14d9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/signal/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/signal/7-1.c
@@ -22,7 +22,7 @@ void myhandler(int signo)
 	printf("handler does nothing useful.\n");
 }
 
-int main()
+int main(void)
 {
 	errno = -1;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/1-1.c
index 8e7af6b35..217275cea 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/1-1.c
@@ -50,7 +50,7 @@ static void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/1-2.c
index 9eaaab9ba..4765e4ecb 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/1-2.c
@@ -51,7 +51,7 @@ static void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 	int i;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/2-1.c
index f0a18566c..f53cedaad 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/2-1.c
@@ -84,7 +84,7 @@ static void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/3-1.c
index 586a17938..72b480637 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/3-1.c
@@ -70,7 +70,7 @@ static void *a_thread_func()
 	return NULL;
 }
 
-int main()
+int main(void)
 {
 	pthread_t new_th;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/4-1.c
index 3d45aea69..832388ce5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigpause/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigpause/4-1.c
@@ -29,7 +29,7 @@ int main(void)
 	return PTS_UNSUPPORTED;
 }
 #else
-int main()
+int main(void)
 {
 	int return_value = 0;
 	int result;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-1.c
index 028172de4..2f5d54d86 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-1.c
@@ -17,7 +17,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	sigset_t blockset;
 	sigset_t prevset;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-2.c
index 817834129..dcbec71d4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-2.c
@@ -76,7 +76,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-3.c
index e118ba542..72434140c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigpending/1-3.c
@@ -76,7 +76,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	sigset_t blockset;
 	sigset_t prevset;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigpending/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigpending/2-1.c
index 50831ed98..aba812c34 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigpending/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigpending/2-1.c
@@ -16,7 +16,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	sigset_t blockset;
 	sigset_t prevset;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/1-1.c
index b59e8412c..b2ea145f4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/1-1.c
@@ -38,7 +38,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	}
 }
 
-int main()
+int main(void)
 {
 	int pid;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/10-1.c
index cb2b2c9df..0281ac96b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/10-1.c
@@ -20,7 +20,7 @@
 #include <sys/types.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int failure = 0;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/11-1.c
index a9665ea30..9052296e1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/11-1.c
@@ -20,7 +20,7 @@
 #include <sys/types.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int failure = 0;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/12-1.c
index 3869fb186..25d352c06 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/12-1.c
@@ -55,7 +55,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	int failure = 0;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/2-1.c
index cc75f1dd5..4733e5e0d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/2-1.c
@@ -19,7 +19,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	union sigval value;
 	value.sival_int = 0;	/* 0 is just an arbitrary value */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/2-2.c
index 58b526ef0..c0ec6e096 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/2-2.c
@@ -28,7 +28,7 @@
 #include <sys/types.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	int failure = 0;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/3-1.c
index fb2a8c409..dcfb9fac5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/3-1.c
@@ -58,7 +58,7 @@ int set_nonroot()
 	return 0;
 }
 
-int main()
+int main(void)
 {
 
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/4-1.c
index f851bdb8f..7cc4ce279 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/4-1.c
@@ -37,7 +37,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	counter++;
 }
 
-int main()
+int main(void)
 {
 	int pid, i;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/5-1.c
index 4d72d91ce..aeeccf309 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/5-1.c
@@ -37,7 +37,7 @@ void myhandler(int signo)
 	counter++;
 }
 
-int main()
+int main(void)
 {
 	int pid, i;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/6-1.c
index 76fb19e5a..f28ebef5c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/6-1.c
@@ -48,7 +48,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	}
 }
 
-int main()
+int main(void)
 {
 	int pid;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/7-1.c
index cba0cf171..e9f96cd2f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/7-1.c
@@ -43,7 +43,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	}
 }
 
-int main()
+int main(void)
 {
 	int pid, rtsig;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/8-1.c
index 9fd78875e..14704bbd9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigqueue/8-1.c
@@ -38,7 +38,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	counter++;
 }
 
-int main()
+int main(void)
 {
 	int pid, i;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigset/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigset/1-1.c
index 1dca365e5..0e6af26ea 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigset/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigset/1-1.c
@@ -32,7 +32,7 @@ void myhandler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigset/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigset/10-1.c
index 225b04713..780600f47 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigset/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigset/10-1.c
@@ -18,7 +18,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	if (sigset(SIGKILL, SIG_IGN) == SIG_ERR) {
 		if (errno != EINVAL) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigset/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigset/2-1.c
index c2a5ddfe6..db4c4745b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigset/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigset/2-1.c
@@ -31,7 +31,7 @@ void myhandler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	act.sa_flags = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigset/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigset/3-1.c
index 6724eed4d..05530f0b1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigset/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigset/3-1.c
@@ -29,7 +29,7 @@ void myhandler(int signo)
 	handler_called = 1;
 }
 
-int main()
+int main(void)
 {
 	if (sigset(SIGCHLD, myhandler) == SIG_ERR) {
 		perror("Unexpected error while using sigset()");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigset/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigset/4-1.c
index 8288b011d..0830c2380 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigset/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigset/4-1.c
@@ -29,7 +29,7 @@ void myhandler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	if (sigset(SIGCHLD, myhandler) == SIG_ERR) {
 		perror("Unexpected error while using sigset()");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigset/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigset/5-1.c
index a253aa90c..20d33074a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigset/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigset/5-1.c
@@ -55,7 +55,7 @@ void myhandler(int signo)
 {
 }
 
-int main()
+int main(void)
 {
 	sigset_t mask;
 	sigemptyset(&mask);
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigset/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigset/9-1.c
index e73624d6b..6c09fa337 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigset/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigset/9-1.c
@@ -22,7 +22,7 @@ void myhandler(int signo)
 	printf("SIGUSR1 called. Inside handler\n");
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 	act.sa_flags = 0;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/1-1.c
index 3d5dbc5db..fa4e58b67 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/1-1.c
@@ -67,7 +67,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	pid = fork();
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/3-1.c
index 31e3c59d0..001ff0ab5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/3-1.c
@@ -29,7 +29,7 @@
 #include <unistd.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	pid = fork();
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/4-1.c
index f2edb1947..44e626fd6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/4-1.c
@@ -71,7 +71,7 @@ int is_changed(sigset_t set, int sig)
 	return 0;
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	pid = fork();
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/6-1.c
index d16952a03..9023eeeee 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigsuspend/6-1.c
@@ -30,7 +30,7 @@ void handler(int signo)
 	printf("Now inside signal handler\n");
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	pid = fork();
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/1-1.c
index 869b38ba8..15f32a89b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/1-1.c
@@ -53,7 +53,7 @@ void myhandler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/2-1.c
index 585243451..a0fcaca43 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/2-1.c
@@ -54,7 +54,7 @@ void myhandler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/4-1.c
index bdcbfc325..5448fdcd4 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/4-1.c
@@ -32,7 +32,7 @@ void myhandler(int signo)
 	printf("Inside handler\n");
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/5-1.c
index 87d0f9f09..0984cc193 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/5-1.c
@@ -48,7 +48,7 @@ void myhandler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/6-1.c
index a7d32471c..037fa1ed1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigtimedwait/6-1.c
@@ -50,7 +50,7 @@ void myhandler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main()
+int main(void)
 {
 	struct sigaction act;
 
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/1-1.c
index 3eb562f94..95f2ecfc0 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/1-1.c
@@ -19,7 +19,7 @@
  *  4)  Verify this process will return when the signal is sent.
  */
 
-int main()
+int main(void)
 {
 	sigset_t newmask, pendingset;
 	int sig;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/2-1.c
index f914885bf..b77f07631 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/2-1.c
@@ -26,7 +26,7 @@
  *  6) Verify that there are no more instances for SIGRTMIN in the pending list. *
  */
 
-int main()
+int main(void)
 {
 	sigset_t newmask, pendingset;
 	int sig;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/3-1.c
index 9e867a37a..a32fe73f7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/3-1.c
@@ -24,7 +24,7 @@
  *
  */
 
-int main()
+int main(void)
 {
 	sigset_t newmask, pendingset;
 	int sig;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/4-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/4-1.c
index b2356711c..1c79b2829 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/4-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/4-1.c
@@ -21,7 +21,7 @@
  *  4)  Verify this process will return when the signal is sent.
  */
 
-int main()
+int main(void)
 {
 	sigset_t newmask, pendingset;
 	int sig;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/6-1.c
index fd4427967..b468148e7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/6-1.c
@@ -108,7 +108,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	pthread_t ch[NTHREADS];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/6-2.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/6-2.c
index 237f21c13..7d8fcc6fa 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/6-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/6-2.c
@@ -110,7 +110,7 @@ void *threaded(void *arg)
 }
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i;
 	pthread_t ch[NTHREADS];
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/7-1.c
index 8474d940b..f0206a31b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/7-1.c
@@ -80,7 +80,7 @@
 /******************************************************************************/
 
 /* The main test function. */
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret, i, sig;
 	long rts;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/8-1.c
index e2216edb4..b4840e7b5 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwait/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwait/8-1.c
@@ -20,7 +20,7 @@
  *  4)  Verify the return value and the 'sig' value is correct.
  */
 
-int main()
+int main(void)
 {
 	sigset_t newmask, pendingset;
 	int sig;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/1-1.c
index 637ad382e..18378ed4f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/1-1.c
@@ -32,7 +32,7 @@ void myhandler(int signo)
 	printf("Inside handler\n");
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/2-1.c
index efb1420a9..7e3f17168 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/2-1.c
@@ -34,7 +34,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	printf("Inside dummy handler\n");
 }
 
-int main()
+int main(void)
 {
 	int pid, rtsig;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/3-1.c
index f1018e84b..81af2ff04 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/3-1.c
@@ -31,7 +31,7 @@ void handler(int signo)
 	printf("Inside dummy handler\n");
 }
 
-int main()
+int main(void)
 {
 	pid_t pid;
 	pid = fork();
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/5-1.c
index ce98fba82..1db765a76 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/5-1.c
@@ -31,7 +31,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	printf("Inside handler\n");
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/6-1.c
index faac33a53..3b291a2b2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/6-1.c
@@ -31,7 +31,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	printf("Inside handler\n");
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/7-1.c
index bd4319f0b..461ab1185 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/7-1.c
@@ -38,7 +38,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	counter++;
 }
 
-int main()
+int main(void)
 {
 	int pid, i;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/8-1.c
index 1ef43fd23..81dd553d9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/8-1.c
@@ -37,7 +37,7 @@ void myhandler(int signo, siginfo_t * info, void *context)
 	printf("Just a dummy handler\n");
 }
 
-int main()
+int main(void)
 {
 	int pid, i;
 	union sigval value;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/9-1.c
index 7c082993d..2bbf11e31 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/sigwaitinfo/9-1.c
@@ -31,7 +31,7 @@ void myhandler(int signo)
 	printf("Inside handler\n");
 }
 
-int main()
+int main(void)
 {
 
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/strftime/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/strftime/1-1.c
index 2afca0bad..bbbeacff6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/strftime/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/strftime/1-1.c
@@ -17,7 +17,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* current time */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/strftime/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/strftime/2-1.c
index 9bc68a2fb..553599449 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/strftime/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/strftime/2-1.c
@@ -18,7 +18,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 
 	/* current time */
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/strftime/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/strftime/3-1.c
index 61521a8d8..d13aa71ac 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/strftime/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/strftime/3-1.c
@@ -14,7 +14,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 	struct tm *tm_ptr;
 	time_t the_time;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/testfrmw/threads_scenarii.c b/testcases/open_posix_testsuite/conformance/interfaces/testfrmw/threads_scenarii.c
index 530ccce40..d605a7e8e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/testfrmw/threads_scenarii.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/testfrmw/threads_scenarii.c
@@ -488,7 +488,7 @@ int sc;
 
 extern void *threaded(void *arg);
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	int ret = 0;
 	pthread_t child;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/1-1.c
index 06f19524c..57f8eb23b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/1-1.c
@@ -39,7 +39,7 @@ void handler(int signo)
 	printf("Caught signal\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/10-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/10-1.c
index 4af2f43f3..f0ecbca1b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/10-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/10-1.c
@@ -28,7 +28,7 @@ static void handler(int signo)
 	caught_signal = 1;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 #if _POSIX_CPUTIME == -1
 	printf("_POSIX_CPUTIME not defined\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/11-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/11-1.c
index 707a678db..be3a73b47 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/11-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/11-1.c
@@ -28,7 +28,7 @@ static void handler(int signo)
 	caught_signal = 1;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 #if _POSIX_THREAD_CPUTIME == -1
 	printf("_POSIX_THREAD_CPUTIME not defined\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/16-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/16-1.c
index 1c6488a0d..e696c8855 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/16-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/16-1.c
@@ -17,7 +17,7 @@
 
 #define INVALIDCLOCKID 99999
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/3-1.c
index f47853b24..851ad1e99 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/3-1.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	printf("Caught signal\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/7-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/7-1.c
index 1e7f85560..ee45c2aa8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/7-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/7-1.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	printf("Caught signal\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 #ifdef CLOCK_MONOTONIC
 	if (sysconf(_SC_MONOTONIC_CLOCK) == -1) {
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/8-1.c
index bd6ac499b..0ee679c68 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/8-1.c
@@ -53,7 +53,7 @@ void handler(int signo)
 	printf("Not expected - Caught signal\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	timer_t tid;
 	struct sigaction actp;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/9-1.c
index 3cda8fcf0..df606850e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/9-1.c
@@ -34,7 +34,7 @@ void handler(int signo)
 	printf("Caught signal\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/15-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/15-1.c
index 7baaa61e0..2f21aff8c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/15-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/15-1.c
@@ -26,7 +26,7 @@
 #include <limits.h>
 #include "posixtest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 #ifdef TIMER_MAX
 	struct sigevent ev;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/2-1.c
index bec4fbd18..87bf4c044 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/2-1.c
@@ -30,7 +30,7 @@ int compare(const void *key, const void *amemb)
 	}
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/5-1.c
index 01312a924..348f078b1 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_create/speculative/5-1.c
@@ -47,7 +47,7 @@ void handler(int signo)
 	printf("Caught signal\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigaction act;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/1-1.c
index 8491187d6..d6611a32d 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/1-1.c
@@ -37,7 +37,7 @@ void handler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/1-2.c
index c899e4de5..769bfc0c2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/1-2.c
@@ -26,7 +26,7 @@
 #define SIGTOTEST SIGALRM
 #define TIMERSEC 3
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/speculative/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/speculative/5-1.c
index c77479e9b..4475d8c90 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/speculative/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/speculative/5-1.c
@@ -17,7 +17,7 @@
 
 #define BOGUSTIMERID 99999
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	timer_t tid;
 	int tval = BOGUSTIMERID;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/speculative/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/speculative/5-2.c
index bd85acb85..3f857f499 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/speculative/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_delete/speculative/5-2.c
@@ -32,7 +32,7 @@ void handler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/1-1.c
index ad011be93..c9656de9e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/1-1.c
@@ -36,7 +36,7 @@ void handler(int signo)
 	}
 }
 
-int main()
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-1.c
index da8df4d4c..43e88bf29 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-1.c
@@ -28,7 +28,7 @@
 
 #define EXPECTEDOVERRUNS 2
 
-int main()
+int main(void)
 {
 	sigset_t set;
 	struct sigevent ev;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-2.c
index 56cebde20..0284f2f01 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-2.c
@@ -31,7 +31,7 @@
 
 #define EXPECTEDOVERRUNS 75
 
-int main()
+int main(void)
 {
 	sigset_t set;
 	struct sigevent ev;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-3.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-3.c
index 1f379e92e..0528d4de7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/2-3.c
@@ -41,7 +41,7 @@
 #include <stdio.h>
 #include "posixtest.h"
 
-int main()
+int main(void)
 {
 #ifndef _POSIX_REALTIME_SIGNALS
 	printf("_POSIX_REALTIME_SIGNALS is not defined\n");
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-1.c
index e9c78c8bf..e7646daf3 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-1.c
@@ -17,7 +17,7 @@
 
 #define BOGUSTID 9999
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	timer_t tid;
 	int tval = BOGUSTID;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-2.c
index 06837a8c4..6be703729 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-2.c
@@ -24,7 +24,7 @@
 
 #define TIMERSEC 3
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-3.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-3.c
index 7c7531a65..8cb5dd8ad 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_getoverrun/speculative/6-3.c
@@ -21,7 +21,7 @@
 #include <time.h>
 #include "posixtest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-1.c
index 5e8f20ddf..38728fb8f 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-1.c
@@ -27,7 +27,7 @@
 #define TIMERSEC 5
 #define ACCEPTABLEDELTA 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-2.c
index 67bcbcd52..a49923292 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-2.c
@@ -29,7 +29,7 @@
 #define SLEEPSEC 2
 #define ACCEPTABLEDELTA 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-3.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-3.c
index 9c710727d..4b2d998c9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-3.c
@@ -29,7 +29,7 @@
 #define SLEEPNSEC 400000000
 #define ACCEPTABLEDELTA 30000000
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-4.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-4.c
index 13ce8a6d7..5ee9f405e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/1-4.c
@@ -35,7 +35,7 @@
 #define ACCEPTABLEDELTA 1
 #define RESOLUTION	1000000
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/2-1.c
index c0c8eafff..47da74198 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/2-1.c
@@ -21,7 +21,7 @@
 
 #define TIMERSEC 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/2-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/2-2.c
index 578e29a12..f4148e051 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/2-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/2-2.c
@@ -23,7 +23,7 @@
 #define TIMERSEC 1
 #define SLEEPDELTA 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/3-1.c
index 27a742215..18e8a77c6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/3-1.c
@@ -28,7 +28,7 @@
 #define SLEEPDELTA 3
 #define ACCEPTABLEDELTA 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-1.c
index 295cbb570..0935c04b8 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-1.c
@@ -17,7 +17,7 @@
 
 #define BOGUSTID 9999
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	timer_t tid;
 	struct itimerspec its;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-2.c
index ce041790d..c3c9dfac9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-2.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-3.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-3.c
index ad9dcdc5b..b2c72a555 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_gettime/speculative/6-3.c
@@ -19,7 +19,7 @@
 #include <errno.h>
 #include "posixtest.h"
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/1-1.c
index f854aa334..fc1e644f7 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/1-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/1-1.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	printf("Caught signal\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/1-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/1-2.c
index 6636270a0..24c02eb58 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/1-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/1-2.c
@@ -33,7 +33,7 @@ void handler(int signo)
 	printf("Caught signal\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/13-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/13-1.c
index e2e61b88b..3596305b9 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/13-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/13-1.c
@@ -56,7 +56,7 @@ static int testlist[NUMTESTS][4] = {
 	{1, 0, -1073743192, 0},	// value.it_interval.tv_sec < 0
 };
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/2-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/2-1.c
index 7c2b9b1e4..55c6a2122 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/2-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/2-1.c
@@ -33,7 +33,7 @@
 
 #define NUMREPS 5
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-1.c
index 46fa3fb1d..b74138821 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-1.c
@@ -37,7 +37,7 @@ void handler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-2.c
index 0dc6679e9..b45355737 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-2.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	exit(PTS_FAIL);
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-3.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-3.c
index afb2ae1c5..5773d1f4e 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/3-3.c
@@ -29,7 +29,7 @@ void handler(int signo)
 	printf("OK to be in once\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	sigset_t set;
 	struct sigevent ev;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-1.c
index b4d91b455..03ea922ee 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-1.c
@@ -36,7 +36,7 @@ void handler(int signo)
 	printf("Caught signal\n");
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-2.c
index 26c4b1050..6d7fe817b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-2.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	exit(PTS_PASS);
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-3.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-3.c
index 974ba87ef..89a7e27d2 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/5-3.c
@@ -41,7 +41,7 @@ void handler(int signo)
 	passes += 1;
 }
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	struct sigaction act;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/6-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/6-1.c
index 915fbbde3..ef37abf5a 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/6-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/6-1.c
@@ -29,7 +29,7 @@
 #define TIMERINTERVALSEC 5
 #define ACCEPTABLEDELTA 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-1.c
index aa5e6ed9c..0add2d225 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-1.c
@@ -22,7 +22,7 @@
 
 #define TIMERSEC 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-2.c
index be4e9e6d0..b66ea2167 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-2.c
@@ -24,7 +24,7 @@
 #define TIMERSEC 1
 #define SLEEPDELTA 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-3.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-3.c
index ca0d40f0c..c34938f87 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-3.c
@@ -28,7 +28,7 @@
 #define TIMELEFT 5
 #define ACCEPTABLEDELTA 1
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-4.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-4.c
index 1010f381b..ad4ecbfe6 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-4.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/8-4.c
@@ -25,7 +25,7 @@
 #define TIMERSEC 1
 #define RELOADVAL 8
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/9-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/9-1.c
index 0d2579470..0f598615c 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/9-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/9-1.c
@@ -34,7 +34,7 @@ static int timeroffsets[NUMTESTS][2] = { {0, 30000000}, {1, 0},
 {1, 5000}, {1, 5}
 };
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/9-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/9-2.c
index 3d248c7d5..598ec8a53 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/9-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/9-2.c
@@ -41,7 +41,7 @@ static int timeroffsets[NUMTESTS][2] = { {0, 90000000}, {1, 0},
 {3, 5000}, {4, 5}
 };
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-1.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-1.c
index 5be8f0d42..a1b99972b 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-1.c
@@ -16,7 +16,7 @@
 
 #define BOGUSTID 9999
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	timer_t tid;
 	struct itimerspec its;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-2.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-2.c
index 60cbf2503..29a8ad343 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-2.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-2.c
@@ -23,7 +23,7 @@
 
 #define SIGTOTEST SIGALRM
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-3.c b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-3.c
index 2676c8917..5897fae45 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-3.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/timer_settime/speculative/12-3.c
@@ -21,7 +21,7 @@
 
 #define SIGTOTEST SIGALRM
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct sigevent ev;
 	timer_t tid;