https://github.com/python/cpython/commit/e6905e4c82cc05897dc1bf5ab2b5b94b2b0... commit: e6905e4c82cc05897dc1bf5ab2b5b94b2b043a7f branch: master author: Victor Stinner <vstinner@python.org> committer: GitHub <noreply@github.com> date: 2020-09-01T18:25:14+02:00 summary: bpo-41617: Fix pycore_bitutils.h to support clang 3.0 (GH-22042) __builtin_bswap16() is not available in LLVM clang 3.0. files: A Misc/NEWS.d/next/Build/2020-08-24-18-34-01.bpo-41617.sKKXz7.rst M Include/internal/pycore_bitutils.h diff --git a/Include/internal/pycore_bitutils.h b/Include/internal/pycore_bitutils.h index 0bd3270fe82e5..1602fc68d9407 100644 --- a/Include/internal/pycore_bitutils.h +++ b/Include/internal/pycore_bitutils.h @@ -17,10 +17,12 @@ extern "C" { # error "this header requires Py_BUILD_CORE define" #endif -#if defined(__clang__) || \ - (defined(__GNUC__) && \ - ((__GNUC__ >= 5) || (__GNUC__ == 4) && (__GNUC_MINOR__ >= 8))) - /* __builtin_bswap16() is available since GCC 4.8, +#if ((defined(__GNUC__) \ + && ((__GNUC__ >= 5) || (__GNUC__ == 4) && (__GNUC_MINOR__ >= 8))) \ + || (defined(__clang__) \ + && (__clang_major__ >= 4 \ + || (__clang_major__ == 3 && __clang_minor__ >= 2)))) + /* __builtin_bswap16() is available since GCC 4.8 and clang 3.2, __builtin_bswap32() is available since GCC 4.3, __builtin_bswap64() is available since GCC 4.3. */ # define _PY_HAVE_BUILTIN_BSWAP diff --git a/Misc/NEWS.d/next/Build/2020-08-24-18-34-01.bpo-41617.sKKXz7.rst b/Misc/NEWS.d/next/Build/2020-08-24-18-34-01.bpo-41617.sKKXz7.rst new file mode 100644 index 0000000000000..715eadbee896f --- /dev/null +++ b/Misc/NEWS.d/next/Build/2020-08-24-18-34-01.bpo-41617.sKKXz7.rst @@ -0,0 +1,2 @@ +Fix ``pycore_bitutils.h`` header file to support old clang versions: +``__builtin_bswap16()`` is not available in LLVM clang 3.0.