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* bpo-41617: Add _Py__has_builtin() macro (GH-23260) (GH-23262)Victor Stinner2020-11-131-9/+6
| | | | | | | | | | | | 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> (cherry picked from commit b3b98082c5431e77c64cab2c85525a804436b505)
* bpo-41617: Fix pycore_byteswap.h to support clang 3.0 (GH-22042) (GH-22044)Victor Stinner2020-09-011-4/+6
| | | | | __builtin_bswap16() is not available in LLVM clang 3.0. (cherry picked from commit e6905e4c82cc05897dc1bf5ab2b5b94b2b043a7f)
* bpo-40302: Add pycore_byteswap.h header file (GH-19552)Victor Stinner2020-04-171-0/+89
Add a new internal pycore_byteswap.h header file with the following functions: * _Py_bswap16() * _Py_bswap32() * _Py_bswap64() Use these functions in _ctypes, sha256 and sha512 modules, and also use in the UTF-32 encoder. sha256, sha512 and _ctypes modules are now built with the internal C API.