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Reapply "bswap.h: add support for built-in bswap functions"

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The `bswap.h` header was introduced to fix the Windows/ARM64 build.
Unfortunately, this broke big Endian machines. Instead of fixing it
properly, upstream Git simply reverted the commit in 1c62df0abe3d
(Revert "bswap.h: add support for built-in bswap functions",
2025-06-12), re-breaking the Windows/ARM64 build.

Let's re-un-break the Windows/ARM64 build by reverting 1c62df0abe3d
(Revert "bswap.h: add support for built-in bswap functions",
2025-06-12).

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This commit is contained in:
Johannes Schindelin 2025-06-16 21:26:56 +02:00
parent 7f212148ed
commit 311e67dc24
1 changed files with 13 additions and 1 deletions
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14
compat/bswap.h
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@ -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)