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Use GNUC atomics from GCC 4.9 

GCC began to offer full support for the C11 standard starting with version 4.9,
including support for the _Atomic keyword.

https://gcc.gnu.org/gcc-4.9/changes.html
This commit is contained in:
Björn Svensson 2024-05-24 11:53:51 +02:00 committed by fengbojiang
parent 486200e57f
commit c4dfb94e98
2 changed files with 2 additions and 2 deletions
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2
freebsd/sys/cdefs.h
View File

@ -264,7 +264,7 @@
#endif #endif
#if !defined(__cplusplus) && !__has_extension(c_atomic) && \ #if !defined(__cplusplus) && !__has_extension(c_atomic) && \
!__has_extension(cxx_atomic) && !__GNUC_PREREQ__(4, 7) !__has_extension(cxx_atomic) && !__GNUC_PREREQ__(4, 9)
/* /*
* No native support for _Atomic(). Place object in structure to prevent * No native support for _Atomic(). Place object in structure to prevent
* most forms of direct non-atomic access. * most forms of direct non-atomic access.

2
freebsd/sys/stdatomic.h
View File

@ -37,7 +37,7 @@
#if defined(__clang__) && (__has_extension(c_atomic) || __has_extension(cxx_atomic)) #if defined(__clang__) && (__has_extension(c_atomic) || __has_extension(cxx_atomic))
#define __CLANG_ATOMICS #define __CLANG_ATOMICS
#elif __GNUC_PREREQ__(4, 7) #elif __GNUC_PREREQ__(4, 9)
#define __GNUC_ATOMICS #define __GNUC_ATOMICS
#elif defined(__GNUC__) #elif defined(__GNUC__)
#define __SYNC_ATOMICS #define __SYNC_ATOMICS