git: 7407dd9f47f2 - stable/15 - libc: Add atomics C23 feature test macro

The branch stable/15 has been updated by kfv:

URL: https://cgit.FreeBSD.org/src/commit/?id=7407dd9f47f2740917de00a564e56154a830db2c

commit 7407dd9f47f2740917de00a564e56154a830db2c
Author:     Faraz Vahedi <kfv@FreeBSD.org>
AuthorDate: 2026-05-01 01:01:20 +0000
Commit:     Faraz Vahedi <kfv@FreeBSD.org>
CommitDate: 2026-10-31 10:03:29 +0000

    libc: Add atomics C23 feature test macro
    
    Signed-off-by: Faraz Vahedi <kfv@kfv.io>
    Reviewed by: imp
    Pull Request: https://github.com/freebsd/freebsd-src/pull/2185
    (cherry picked from commit 85becdacf3b043849b240eb1b1b2cde63add0690)
---
 sys/sys/stdatomic.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sys/sys/stdatomic.h b/sys/sys/stdatomic.h
index 67107f47e6b3..c3f9b217519c 100644
--- a/sys/sys/stdatomic.h
+++ b/sys/sys/stdatomic.h
@@ -27,8 +27,8 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _STDATOMIC_H_
-#define	_STDATOMIC_H_
+#ifndef __STDC_VERSION_STDATOMIC_H__
+#define __STDC_VERSION_STDATOMIC_H__	202311L
 
 #include <sys/cdefs.h>
 #include <sys/_types.h>
@@ -421,4 +421,4 @@ atomic_flag_clear(volatile atomic_flag *__object)
 #undef __bool_locally_defined
 #endif
 
-#endif /* !_STDATOMIC_H_ */
+#endif /* !__STDC_VERSION_STDATOMIC_H__ */