diff options
Diffstat (limited to 'libcxx/include/__config')
| -rw-r--r-- | libcxx/include/__config | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/libcxx/include/__config b/libcxx/include/__config index e82d7fec566d..f0bc3483facd 100644 --- a/libcxx/include/__config +++ b/libcxx/include/__config @@ -353,6 +353,18 @@ # endif // __linux__ #endif +#ifndef _LIBCPP_CXX03_LANG +# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) +#elif defined(_LIBCPP_COMPILER_CLANG) +# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) +#else +// This definition is potentially buggy, but it's only taken with GCC in C++03, +// which we barely support anyway. See llvm.org/PR39713 +# define _LIBCPP_ALIGNOF(_Tp) __alignof(_Tp) +#endif + +#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) + #if defined(_LIBCPP_COMPILER_CLANG) // _LIBCPP_ALTERNATE_STRING_LAYOUT is an old name for @@ -367,7 +379,7 @@ # define _ALIGNAS_TYPE(x) alignas(x) # define _ALIGNAS(x) alignas(x) #else -# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x)))) +# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) # define _ALIGNAS(x) __attribute__((__aligned__(x))) #endif @@ -494,7 +506,7 @@ typedef __char32_t char32_t; #elif defined(_LIBCPP_COMPILER_GCC) #define _ALIGNAS(x) __attribute__((__aligned__(x))) -#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x)))) +#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) #define _LIBCPP_NORETURN __attribute__((noreturn)) @@ -607,7 +619,7 @@ typedef __char32_t char32_t; #elif defined(_LIBCPP_COMPILER_IBM) #define _ALIGNAS(x) __attribute__((__aligned__(x))) -#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x)))) +#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) #define _ATTRIBUTE(x) __attribute__((x)) #define _LIBCPP_NORETURN __attribute__((noreturn)) |