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$NetBSD: patch-Lib___osx__support.py,v 1.1 2020/11/17 19:33:26 sjmulder Exp $
Support for macOS 11 and Apple Silicon (ARM). Mostly backported from:
https://github.com/python/cpython/pull/22855
--- Lib/_osx_support.py.orig 2020-08-15 05:20:16.000000000 +0000
+++ Lib/_osx_support.py
@@ -110,6 +110,25 @@ def _get_system_version():
return _SYSTEM_VERSION
+_SYSTEM_VERSION_TUPLE = None
+def _get_system_version_tuple():
+ """
+ Return the macOS system version as a tuple
+
+ The return value is safe to use to compare
+ two version numbers.
+ """
+ global _SYSTEM_VERSION_TUPLE
+ if _SYSTEM_VERSION_TUPLE is None:
+ osx_version = _get_system_version()
+ if osx_version:
+ try:
+ _SYSTEM_VERSION_TUPLE = tuple(int(i) for i in osx_version.split('.'))
+ except ValueError:
+ _SYSTEM_VERSION_TUPLE = ()
+
+ return _SYSTEM_VERSION_TUPLE
+
def _remove_original_values(_config_vars):
"""Remove original unmodified values for testing"""
# This is needed for higher-level cross-platform tests of get_platform.
@@ -132,14 +151,18 @@ def _supports_universal_builds():
# builds, in particular -isysroot and -arch arguments to the compiler. This
# is in support of allowing 10.4 universal builds to run on 10.3.x systems.
- osx_version = _get_system_version()
- if osx_version:
- try:
- osx_version = tuple(int(i) for i in osx_version.split('.'))
- except ValueError:
- osx_version = ''
+ osx_version = _get_system_version_tuple()
return bool(osx_version >= (10, 4)) if osx_version else False
+def _supports_arm64_builds():
+ """Returns True if arm64 builds are supported on this system"""
+ # There are two sets of systems supporting macOS/arm64 builds:
+ # 1. macOS 11 and later, unconditionally
+ # 2. macOS 10.15 with Xcode 12.2 or later
+ # For now the second category is ignored.
+ osx_version = _get_system_version_tuple()
+ return osx_version >= (11, 0) if osx_version else False
+
def _find_appropriate_compiler(_config_vars):
"""Find appropriate C compiler for extension module builds"""
@@ -331,6 +354,12 @@ def compiler_fixup(compiler_so, cc_args)
except ValueError:
break
+ elif not _supports_arm64_builds():
+ # Look for "-arch arm64" and drop that
+ for idx in range(len(compiler_so)):
+ if compiler_so[idx] == '-arch' and compiler_so[idx+1] == "arm64":
+ del compiler_so[idx:idx+2]
+
if 'ARCHFLAGS' in os.environ and not stripArch:
# User specified different -arch flags in the environ,
# see also distutils.sysconfig
@@ -481,6 +510,8 @@ def get_platform_osx(_config_vars, osnam
if len(archs) == 1:
machine = archs[0]
+ elif archs == ('arm64', 'x86_64'):
+ machine = 'universal2'
elif archs == ('i386', 'ppc'):
machine = 'fat'
elif archs == ('i386', 'x86_64'):
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