diff options
Diffstat (limited to '')
| -rw-r--r-- | compat/bswap.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/compat/bswap.h b/compat/bswap.h index b34054f2bd..9e0f98e00b 100644 --- a/compat/bswap.h +++ b/compat/bswap.h @@ -35,7 +35,19 @@ static inline uint64_t default_bswap64(uint64_t val) #undef bswap32 #undef bswap64 -#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) +/** + * __has_builtin is available since Clang 10 and GCC 10. + * Below is a fallback for older compilers. + */ +#ifndef __has_builtin + #define __has_builtin(x) 0 +#endif + +#if __has_builtin(__builtin_bswap32) && __has_builtin(__builtin_bswap64) +#define bswap32(x) __builtin_bswap32((x)) +#define bswap64(x) __builtin_bswap64((x)) + +#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) #define bswap32 git_bswap32 static inline uint32_t git_bswap32(uint32_t x) |