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libc++ inttypes.h: define __STDC_CONSTANT_MACROS and __STDC_LIMIT_MACROS

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Before transitively including the base version of inttypes.h, define
__STDC_CONSTANT_MACROS and __STDC_LIMIT_MACROS, because the base
inttypes.h directly includes sys/stdint.h, instead of going through the
'regular' stdint.h.

The libc++ version of the latter does define those macros, to ensure
things like UINT64_C() and SIZE_MAX are defined even in C++98 or C++03.

MFC after:	3 days
This commit is contained in:
Dimitry Andric
2026-01-23 18:31:53 +01:00
parent 6c5fdba45a
commit 3cdb6c9d92
1 changed files with 9 additions and 2 deletions
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contrib/llvm-project/libcxx/include/inttypes.h
+9 -2
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@@ -241,12 +241,19 @@ uintmax_t wcstoumax(const wchar_t* restrict nptr, wchar_t** restrict endptr, int
# pragma GCC system_header
#endif
/* C99 stdlib (e.g. glibc < 2.18) does not provide format macros needed
for C++11 unless __STDC_FORMAT_MACROS is defined
/* C99 stdlib (e.g. glibc < 2.18) does not provide macros needed
for C++11 unless __STDC_CONSTANT_MACROS, __STDC_FORMAT_MACROS
and __STDC_LIMIT_MACROS are defined
*/
#if defined(__cplusplus) && !defined(__STDC_CONSTANT_MACROS)
# define __STDC_CONSTANT_MACROS
#endif
#if defined(__cplusplus) && !defined(__STDC_FORMAT_MACROS)
# define __STDC_FORMAT_MACROS
#endif
#if defined(__cplusplus) && !defined(__STDC_LIMIT_MACROS)
# define __STDC_LIMIT_MACROS
#endif
#if __has_include_next(<inttypes.h>)
# include_next <inttypes.h>