threads/170073: commit references a PR

dfilter service dfilter at FreeBSD.ORG
Sun Aug 18 08:20:01 UTC 2013

The following reply was made to PR threads/170073; it has been noted by GNATS.

From: dfilter at FreeBSD.ORG (dfilter service)
To: bug-followup at
Subject: Re: threads/170073: commit references a PR
Date: Sun, 18 Aug 2013 08:19:02 +0000 (UTC)

 Author: emaste
 Date: Sun Aug 18 08:18:49 2013
 New Revision: 254477
   MFC r239960:
     Properly enable Clang-style atomics when available.
     In addition to testing against cxx_atomic, we must check c_atomic. The
     former is only set when building C++ code. Also use __has_extension
     instead of __has_feature. This allows us to use the atomics outside of
   PR:	threads/170073
 Directory Properties:
   stable/9/include/   (props changed)
 Modified: stable/9/include/stdatomic.h
 --- stable/9/include/stdatomic.h	Sun Aug 18 06:08:52 2013	(r254476)
 +++ stable/9/include/stdatomic.h	Sun Aug 18 08:18:49 2013	(r254477)
 @@ -33,7 +33,7 @@
  #include <sys/cdefs.h>
  #include <sys/_types.h>
 -#if __has_feature(cxx_atomic)
 +#if __has_extension(c_atomic) || __has_extension(cxx_atomic)
  #define	__CLANG_ATOMICS
  #elif __GNUC_PREREQ__(4, 7)
  #define	__GNUC_ATOMICS
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