Last <sys/cdefs.h> change

[Sebastian Huber]

Hello,

what is the reason for the change:

diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 797a671..dc77b7e 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2013-05-22  Corinna Vinschen  <vinschen@redhat.com>
+
+       * libc/include/sys/cdefs.h (_Static_assert): Accommodate gcc >= 4.6.
+
  2013-05-16  Sebastian Huber <sebastian.huber@embedded-brains.de>

         * libc/reent/reent.c (_wrapup_reent): Remove.
diff --git a/newlib/libc/include/sys/cdefs.h b/newlib/libc/include/sys/cdefs.h
index beeea32..5f0922c 100644
--- a/newlib/libc/include/sys/cdefs.h
+++ b/newlib/libc/include/sys/cdefs.h
@@ -267,7 +267,9 @@
  #define        _Alignof(x)             __alignof(x)
  #define        _Noreturn               __dead2
  #define        _Thread_local           __thread
-#ifdef __COUNTER__
+#if __GNUC_PREREQ__(4, 6) && !defined(__cplusplus)
+/*  Do nothing: _Static_assert() works as per C11 */
+#elif defined(__COUNTER__)
  #define        _Static_assert(x, y)    __Static_assert(x, __COUNTER__)
  #define        __Static_assert(x, y)   ___Static_assert(x, y)
  #define        ___Static_assert(x, y)  typedef char __assert_ ## y[(x) ? 1 : -1]

There is already a test for C11 some lines above:

#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
/* Do nothing.  They are language keywords. */
#else
/* Not supported.  Implement them using our versions. */

If you want C11 in GCC, you have to specify -std=c11 or -std=gnu11.

-- 
Sebastian Huber, embedded brains GmbH

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