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libstdc++: Use GCC's predefined macro for endianness [PR104080]

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Instead of hardcoded preprocessor conditionals with explicit target
checks, just rely on the fact that __BYTE_ORDER__ is always defined by
GCC.

libstdc++-v3/ChangeLog:

	PR libstdc++/104080
	* src/c++17/fast_float/LOCAL_PATCHES: Update.
	* src/c++17/fast_float/fast_float.h (FASTFLOAT_IS_BIG_ENDIAN):
	Define in terms of __BYTE_ORDER__.
This commit is contained in:
Jonathan Wakely 2022-01-18 10:01:23 +00:00
parent 97b9236976
commit 8f6b62e0f0
2 changed files with 4 additions and 1 deletions
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1
libstdc++-v3/src/c++17/fast_float/LOCAL_PATCHES
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@ -1,3 +1,4 @@
r12-6647
r12-6648
r12-6664
r12-6665

4
libstdc++-v3/src/c++17/fast_float/fast_float.h
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@ -128,7 +128,9 @@ from_chars_result from_chars_advanced(const char *first, const char *last,
#define FASTFLOAT_VISUAL_STUDIO 1
#endif
#ifdef _WIN32
#ifdef __BYTE_ORDER__
#define FASTFLOAT_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
#elif defined _WIN32
#define FASTFLOAT_IS_BIG_ENDIAN 0
#else
#if defined(__APPLE__) || defined(__FreeBSD__)