diff options
Diffstat (limited to 'Include')
| -rw-r--r-- | Include/pymacro.h | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/Include/pymacro.h b/Include/pymacro.h index e37cda4..342d2a7 100644 --- a/Include/pymacro.h +++ b/Include/pymacro.h @@ -3,20 +3,23 @@ // gh-91782: On FreeBSD 12, if the _POSIX_C_SOURCE and _XOPEN_SOURCE macros are // defined, <sys/cdefs.h> disables C11 support and <assert.h> does not define -// the static_assert() macro. Define the static_assert() macro in Python until -// <sys/cdefs.h> suports C11: +// the static_assert() macro. // https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255290 -#if defined(__FreeBSD__) && !defined(static_assert) -# define static_assert _Static_assert -#endif - -// static_assert is defined in glibc from version 2.16. Before it requires -// compiler support (gcc >= 4.6) and is called _Static_assert. -// In C++ 11 static_assert is a keyword, redefining is undefined behaviour. -#if (defined(__GLIBC__) \ - && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 16)) \ - && !(defined(__cplusplus) && __cplusplus >= 201103L) \ - && !defined(static_assert)) +// +// macOS <= 10.10 doesn't define static_assert in assert.h at all despite +// having C11 compiler support. +// +// static_assert is defined in glibc from version 2.16. Compiler support for +// the C11 _Static_assert keyword is in gcc >= 4.6. +// +// MSVC makes static_assert a keyword in C11-17, contrary to the standards. +// +// In C++11 and C2x, static_assert is a keyword, redefining is undefined +// behaviour. So only define if building as C (if __STDC_VERSION__ is defined), +// not C++, and only for C11-17. +#if !defined(static_assert) && (defined(__GNUC__) || defined(__clang__)) \ + && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L \ + && __STDC_VERSION__ <= 201710L # define static_assert _Static_assert #endif |