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| author | jhb <jhb@FreeBSD.org> | 2016-11-28 18:36:37 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2016-11-28 18:36:37 +0000 |
| commit | 3d2d7a75e475fa129c001fa8411a5ad5f3a08958 (patch) | |
| tree | 5805d4bdf966b4bf80bcc265eddcfae3c253daaa /include | |
| parent | 313b26c41177fe20d7c6635dcbc8be85c51dec2e (diff) | |
| download | FreeBSD-src-3d2d7a75e475fa129c001fa8411a5ad5f3a08958.zip FreeBSD-src-3d2d7a75e475fa129c001fa8411a5ad5f3a08958.tar.gz | |
MFC 307756: Define max_align_t for C11.
libc++'s stddef.h includes an existing definition of max_align_t for
C++11, but it is only defined for C++, not for C. In addition, GCC and
clang both define an alternate version of max_align_t that uses a
union of multiple types rather than a plain long double as in libc++.
This adds a __max_align_t to <sys/_types.h> that matches the GCC and
clang definition that is mapped to max_align_t in <stddef.h>.
PR: 210890
Diffstat (limited to 'include')
| -rw-r--r-- | include/stddef.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/stddef.h b/include/stddef.h index 2c73a2e..99629e0 100644 --- a/include/stddef.h +++ b/include/stddef.h @@ -59,6 +59,14 @@ typedef ___wchar_t wchar_t; #endif #endif +#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L +#ifndef __CLANG_MAX_ALIGN_T_DEFINED +typedef __max_align_t max_align_t; +#define __CLANG_MAX_ALIGN_T_DEFINED +#define __GCC_MAX_ALIGN_T +#endif +#endif + #define offsetof(type, member) __offsetof(type, member) #endif /* _STDDEF_H_ */ |
