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| author | Victor Stinner <vstinner@python.org> | 2020-11-13 14:38:17 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-11-13 14:38:17 (GMT) |
| commit | b3b98082c5431e77c64cab2c85525a804436b505 (patch) | |
| tree | 5ef06418d69d6515b65e049e96e92ea5aadee0ea /Include/pyport.h | |
| parent | d96a7a83133250377219227b5cfab4dbdddc5d3a (diff) | |
| download | cpython-b3b98082c5431e77c64cab2c85525a804436b505.zip cpython-b3b98082c5431e77c64cab2c85525a804436b505.tar.gz cpython-b3b98082c5431e77c64cab2c85525a804436b505.tar.bz2 | |
bpo-41617: Add _Py__has_builtin() macro (GH-23260)
Fix building pycore_bitutils.h internal header on old clang version
without __builtin_bswap16() (ex: Xcode 4.6.3 on Mac OS X 10.7).
Add a new private _Py__has_builtin() macro to check for availability
of a preprocessor builtin function.
Co-Authored-By: Joshua Root <jmr@macports.org>
Co-authored-by: Joshua Root <jmr@macports.org>
Diffstat (limited to 'Include/pyport.h')
| -rw-r--r-- | Include/pyport.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Include/pyport.h b/Include/pyport.h index 79fc7c4..6687849 100644 --- a/Include/pyport.h +++ b/Include/pyport.h @@ -869,4 +869,16 @@ extern _invalid_parameter_handler _Py_silent_invalid_parameter_handler; # define _Py_NO_RETURN #endif + +// Preprocessor check for a builtin preprocessor function. Always return 0 +// if __has_builtin() macro is not defined. +// +// __has_builtin() is available on clang and GCC 10. +#ifdef __has_builtin +# define _Py__has_builtin(x) __has_builtin(x) +#else +# define _Py__has_builtin(x) 0 +#endif + + #endif /* Py_PYPORT_H */ |