removed most gcc extensions in source - but still required

* replaced the c++ style '//' comments
* added explicit math defines M_PI, .. - if not already defined
* gcc function (inline) attributes still require the extensions :-(

Signed-off-by: hayati ayguen <h_ayguen@web.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/pffft.h b/pffft.h
index e6bd256..9d7e862 100644
--- a/pffft.h
+++ b/pffft.h
@@ -77,7 +77,7 @@
 #ifndef PFFFT_H
 #define PFFFT_H
 
-#include <stddef.h> // for size_t
+#include <stddef.h> /* for size_t */
 
 #ifdef __cplusplus
 extern "C" {