[PATCH v2 1/6] Revert "bswap.h: add support for built-in bswap functions"
- From
Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
- Date
- Jun 11, 2025, 22:14 UTC
- Message-ID
- <20250611221444.1567638-2-sebastian@breakpoint.cc>
- In-Reply-To
- <20250611221444.1567638-1-sebastian@breakpoint.cc>
Since 6547d1c9 (bswap.h: add support for built-in bswap functions, 2025-04-23) tweaked the way the bswap32/64 macros are defined, on platforms with __builtin_bswap32/64 supported, the bswap32/64 macros are defined even on big endian platforms.
However this file assumes that bswap31/64 are defined ONLY on little endian machines and uses that assumption to redefine ntohl/ntohll macros. The said commit broke t4014-format-patch.sh test, among many others on s390x.
Revert the commit.
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> --- compat/bswap.h | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-)
diff --git a/compat/bswap.h b/compat/bswap.h index 9e0f98e00b93a..b34054f2bd728 100644 --- a/compat/bswap.h +++ b/compat/bswap.h @@ -35,19 +35,7 @@ static inline uint64_t default_bswap64(uint64_t val) #undef bswap32 #undef bswap64 -/** - * __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__)) +#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) #define bswap32 git_bswap32 static inline uint32_t git_bswap32(uint32_t x)
-- 2.49.0