[PATCH] machine/setjmp.h: Use __extension__ keyword for gcc's braced-groups

[Yang Tse]

Description:

In libc/include/machine/setjmp.h sigsetjmp and siglongjmp are implemented
using gcc's "({ ... })" extension when __GNUC__ is defined. When compiling
with -pedantic this generates a warning message. Putting the __extension__
keyword before the parenthesis suppresses the warning.

How-To-Repeat:

Compiling the following code with "cc -c -pedantic"

#include <setjmp.h>

int main(int argc, char **argv)
{
  sigjmp_buf buf;

  sigsetjmp(buf, 1);
  siglongjmp(buf, 1);
  return 0;
}

generates the following warnings:

foo.c:7: warning: ISO C forbids braced-groups within expressions
foo.c:8: warning: ISO C forbids braced-groups within expressions

Fix:


2006-10-11  Yang Tse  <yangsita@gmail.com>

	* setjmp.h: Use __extension__ keyword for gcc's braced-groups.


Index: newlib/libc/include/machine/setjmp.h
===================================================================
RCS file: /cvs/src/src/newlib/libc/include/machine/setjmp.h,v
retrieving revision 1.28
diff -u -r1.28 setjmp.h
--- newlib/libc/include/machine/setjmp.h	16 Aug 2006 21:39:43 -0000	1.28
+++ newlib/libc/include/machine/setjmp.h	11 Oct 2006 03:20:33 -0000
@@ -257,6 +257,7 @@
 #if defined(__GNUC__)

 #define sigsetjmp(env, savemask) \
+            __extension__ \
             ({ \
               sigjmp_buf *_sjbuf = &(env); \
               ((*_sjbuf)[_SAVEMASK] = savemask,\
@@ -265,6 +266,7 @@
             })

 #define siglongjmp(env, val) \
+            __extension__ \
             ({ \
               sigjmp_buf *_sjbuf = &(env); \
               ((((*_sjbuf)[_SAVEMASK]) ? \