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Allow stdatomic.h to be included from mingw prebuilt.

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Define __GNUC_PREREQ if it isn't already defined.
This is a bit ugly, but it seems to be easiest to make this header as
context-independent as possible.  Together with the addition of a symbolic
link to this file from the mingw prebuilt, this appears to unblock
commit e9fa6be333e35d9e7ae435aeb32532875b95fe22.

Change-Id: I97e39cda8d8f9aa108aa61c4121da09eb9739062
This commit is contained in:
Hans Boehm 2014-11-12 10:34:26 -08:00
parent 22271d0c20
commit 95f197f998
1 changed files with 6 additions and 0 deletions
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6
libc/include/stdatomic.h
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@ -32,6 +32,12 @@
#include <sys/cdefs.h>
#if defined(__GNUC__) && !defined(__GNUC_PREREQ)
/* Duplicate definition here, since the mingw sys/cdefs.h omits the */
/* definition, and this needs to be usable there. */
#define __GNUC_PREREQ(x, y) \
((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || (__GNUC__ > (x)))
#endif /* __GNUC__ && ... */
#if defined(__cplusplus) && __cplusplus >= 201103L && defined(_USING_LIBCXX)
# ifdef __clang__