Revamped the thread configure stuff. Now dce threads (old posix draft) are

1999-03-11  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* configure.in: Revamped the thread configure stuff. Now dce
	threads (old posix draft) are recogniced. This is necessary,
	because dce threads are in fact working quite differently from
	posix threads. Also changed the conditions for checking for MT
	safe functions a bit, because G_THREADS_IMPL_NONE still have to
	compile thread safe.

	* gthread/gthread-posix.c: Now handle both dce and posix
	threads. They are sufficently equal.

NOTE: Please do not commit my change to
glib-1-2/{acconfig.h,configure.in,config.h.win32} from 1999-03-03, as
the current change will take care of that too.

1 files changed, 46 insertions, 47 deletions

diff --git a/configure.in b/configure.in
index 64c9bfebf..09fb8ecda 100644
--- a/configure.in
+++ b/configure.in
@@ -561,7 +561,7 @@ dnl ***********************
 dnl *** g_thread checks ***
 dnl ***********************
 
-AC_ARG_WITH(threads, [  --with-threads=[none/posix/solaris/nspr] specify a thread implementation to use],
+AC_ARG_WITH(threads, [  --with-threads=[none/posix/dce/solaris/nspr] specify a thread implementation to use],
 	if test "x$with_threads" = x; then
 		want_threads=yes
 	else
@@ -579,7 +579,7 @@ dnl error and warning message
 dnl *************************
 
 THREAD_NO_IMPLEMENTATION="You do not have any known thread system on your
-                computer. glib will not be thread safe on your computer."
+                computer. GLib will not have a default thread implementation."
 
 FLAG_DOES_NOT_WORK="I can't find the MACRO, that enables thread safety on your
                 platform (normaly it's "_REENTRANT"). I'll not use any flag on
@@ -612,9 +612,17 @@ if test "x$want_threads" = xyes || test "x$want_threads" = xsolaris; then
 		;;
 	esac
 fi
-if test "x$want_threads" = xyes || test "x$want_threads" = xposix; then
+if test "x$want_threads" = xyes || test "x$want_threads" = xposix \
+				|| test "x$want_threads" = xdce; then
         if test "x$have_threads" = xnone; then
-                AC_CHECK_HEADER(pthread.h, have_threads=posix)
+                AC_EGREP_HEADER([[^a-zA-Z_]pthread_attr_create[^a-zA-Z_]],
+			pthread.h,
+			have_threads=dce)
+        fi
+        if test "x$have_threads" = xnone; then
+                AC_EGREP_HEADER([[^a-zA-Z_]pthread_attr_init[^a-zA-Z_]],
+			pthread.h,
+			have_threads=posix)
         fi
 fi
 if test "x$want_threads" = xyes || test "x$want_threads" = xnspr; then
@@ -641,37 +649,37 @@ G_THREAD_CFLAGS=
 
 mutex_has_default=no
 case $have_threads in
-        posix)
+        posix|dce)
 		G_THREAD_LIBS=error
-		AC_CHECK_LIB(pthread, pthread_attr_init,
-			     G_THREAD_LIBS="-lpthread")
-		if test "x$G_THREAD_LIBS" = xerror; then
-                	AC_CHECK_LIB(pthreads, pthread_attr_init,
-			     	G_THREAD_LIBS="-lpthreads")
-		fi
-		if test "x$G_THREAD_LIBS" = xerror; then
-                	AC_CHECK_LIB(c_r, pthread_attr_init,
-			     	G_THREAD_LIBS="-lc_r")
-		fi
-		if test "x$G_THREAD_LIBS" = xerror; then
-			AC_CHECK_FUNC(pthread_attr_init, G_THREAD_LIBS="")
-		fi
+		glib_save_LIBS="$LIBS"
+		for thread_lib in "" pthread pthreads c_r thread; do
+			# This is not AC_CHECK_LIB to also work with function
+			# name mangling in header files.
+			LIBS="$glib_save_LIBS -l$thread_lib"
+			IN=
+			test x"$thread_lib" = x || IN=" in -l$thread_lib"
+			AC_MSG_CHECKING(for pthread_create$IN)
+			AC_TRY_LINK([#include <pthread.h>],
+				[pthread_create(NULL,NULL,NULL,NULL)],
+				[AC_MSG_RESULT(yes)
+				G_THREAD_LIBS="-l$thread_lib"
+				break],
+				[AC_MSG_RESULT(no)])
+		done
+		LIBS="$glib_save_LIBS"
 		dnl ********** DG/UX ************
-        	if test "x$G_THREAD_LIBS" = xerror; then
-                	AC_CHECK_LIB(thread, __d10_pthread_attr_init,
-				G_THREAD_LIBS="-lthread"
-				G_THREAD_CFLAGS="-D_POSIX4A_DRAFT10_SOURCE")
-        	fi
-		dnl ********* HPUX 11 ***********
-        	if test "x$G_THREAD_LIBS" = xerror; then
-                	AC_CHECK_LIB(pthread, __pthread_attr_init_system,
-				G_THREAD_LIBS="-lpthread")
-        	fi
+               	AC_CHECK_LIB(thread, __d10_pthread_create,
+			G_THREAD_CFLAGS="-D_POSIX4A_DRAFT10_SOURCE")
                 mutex_has_default=yes
                 mutex_default_type='pthread_mutex_t'
                 mutex_default_init='PTHREAD_MUTEX_INITIALIZER'
                 mutex_header_file='pthread.h'
-		g_threads_impl="POSIX"
+		if test "x$have_threads" = "xposix"; then
+			g_threads_impl="POSIX"
+		else
+			g_threads_impl="DCE"
+			have_threads="posix"
+		fi
                 ;;
         solaris)
 		G_THREAD_LIBS=error
@@ -700,14 +708,15 @@ if test "x$G_THREAD_LIBS" = xerror; then
         AC_MSG_ERROR($LIBS_NOT_FOUND_1$have_threads$LIBS_NOT_FOUND_2)
 fi
 
-AC_MSG_CHECKING(necessary linker options)
+AC_MSG_CHECKING(thread related libraries)
 AC_MSG_RESULT($G_THREAD_LIBS)
 
 dnl determination of G_THREAD_CFLAGS
 dnl ********************************
 
-if test x"$have_threads" != xnone; then
-G_THREAD_CFLAGS="$G_THREAD_CFLAGS -D_REENTRANT" # good default guess
+if test x"$enable_threads" = xyes; then
+
+    G_THREAD_CFLAGS="$G_THREAD_CFLAGS -D_REENTRANT" # good default guess
 
     case $host in
 	*-aix*)
@@ -733,17 +742,17 @@ G_THREAD_CFLAGS="$G_THREAD_CFLAGS -D_REENTRANT" # good default guess
     AC_MSG_WARN($FLAG_DOES_NOT_WORK))
     CPPFLAGS=$old_CPPFLAGS
 
-    AC_MSG_CHECKING(necessary compiler options)
+    AC_MSG_CHECKING(thread related cflags)
 
     AC_MSG_RESULT($G_THREAD_CFLAGS)
 else
     G_THREAD_CFLAGS=
 fi
 
-dnl check for mt safe function variants
-dnl ***********************************
+dnl check for mt safe function variants and some posix functions
+dnl ************************************************************
 
-if test x"$have_threads" != xnone; then
+if test x"$enable_threads" = xyes; then
 	glib_save_LIBS="$LIBS"
 	glib_save_CFLAGS="$CFLAGS"
 	# we are not doing the following for now, as this might require glib 
@@ -783,20 +792,10 @@ if test x"$have_threads" != xnone; then
 				AC_DEFINE(HAVE_GETPWUID_R_POSIX)])
 		fi
 	fi
-	if test x"$have_threads" = xposix; then
-		AC_MSG_CHECKING(whether pthread_getspecific is posix like)
-		# PCThreads has pthread_getspecific(pthread_key_t, void **);
-		AC_TRY_COMPILE([#include <pthread.h>],
-			[pthread_getspecific(0,NULL);],
-			[AC_MSG_RESULT(no)],
-			[AC_MSG_RESULT(yes)
-			AC_DEFINE(HAVE_PTHREAD_GETSPECIFIC_POSIX)])
-	fi
 	LIBS="$glib_save_LIBS"
 	CFLAGS="$glib_save_CFLAGS"
-fi
 
-if test "x$enable_threads" = "xyes"; then
+	# now spit out all the warnings.
 	if test "$ac_cv_func_getpwuid_r" != "yes"; then
 		AC_MSG_WARN($FUNC_NO_GETPWUID_R)
 	fi