Issue #13590: OS X Xcode 4 - improve support for universal extension modules
In particular, fix extension module build failures when trying to use
32-bit-only installer Pythons on systems with Xcode 4 (currently
OS X 10.8, 10.7, and optionally 10.6).
* Backport 3.3.0 fixes to 3.2 branch (for release in 3.2.4)
* Since Xcode 4 removes ppc support, extension module builds now
check for ppc compiler support and by default remove ppc and
ppc64 archs when they are not available.
* Extension module builds now revert to using system installed
headers and libs (/usr and /System/Library) if the SDK used
to build the interpreter is not installed or has moved.
* Try to avoid building extension modules with deprecated
and problematic Apple llvm-gcc compiler. If original compiler
is not available, use clang instead by default.
diff --git a/Lib/sysconfig.py b/Lib/sysconfig.py
index b2183d8..253e2ef 100644
--- a/Lib/sysconfig.py
+++ b/Lib/sysconfig.py
@@ -501,64 +501,11 @@
srcdir = os.path.join(base, _CONFIG_VARS['srcdir'])
_CONFIG_VARS['srcdir'] = os.path.normpath(srcdir)
+ # OS X platforms require special customization to handle
+ # multi-architecture, multi-os-version installers
if sys.platform == 'darwin':
- kernel_version = os.uname()[2] # Kernel version (8.4.3)
- major_version = int(kernel_version.split('.')[0])
-
- if major_version < 8:
- # On Mac OS X before 10.4, check if -arch and -isysroot
- # are in CFLAGS or LDFLAGS and remove them if they are.
- # This is needed when building extensions on a 10.3 system
- # using a universal build of python.
- for key in ('LDFLAGS', 'BASECFLAGS',
- # a number of derived variables. These need to be
- # patched up as well.
- 'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
- flags = _CONFIG_VARS[key]
- flags = re.sub('-arch\s+\w+\s', ' ', flags)
- flags = re.sub('-isysroot [^ \t]*', ' ', flags)
- _CONFIG_VARS[key] = flags
- else:
- # Allow the user to override the architecture flags using
- # an environment variable.
- # NOTE: This name was introduced by Apple in OSX 10.5 and
- # is used by several scripting languages distributed with
- # that OS release.
- if 'ARCHFLAGS' in os.environ:
- arch = os.environ['ARCHFLAGS']
- for key in ('LDFLAGS', 'BASECFLAGS',
- # a number of derived variables. These need to be
- # patched up as well.
- 'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
-
- flags = _CONFIG_VARS[key]
- flags = re.sub('-arch\s+\w+\s', ' ', flags)
- flags = flags + ' ' + arch
- _CONFIG_VARS[key] = flags
-
- # If we're on OSX 10.5 or later and the user tries to
- # compiles an extension using an SDK that is not present
- # on the current machine it is better to not use an SDK
- # than to fail.
- #
- # The major usecase for this is users using a Python.org
- # binary installer on OSX 10.6: that installer uses
- # the 10.4u SDK, but that SDK is not installed by default
- # when you install Xcode.
- #
- CFLAGS = _CONFIG_VARS.get('CFLAGS', '')
- m = re.search('-isysroot\s+(\S+)', CFLAGS)
- if m is not None:
- sdk = m.group(1)
- if not os.path.exists(sdk):
- for key in ('LDFLAGS', 'BASECFLAGS',
- # a number of derived variables. These need to be
- # patched up as well.
- 'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
-
- flags = _CONFIG_VARS[key]
- flags = re.sub('-isysroot\s+\S+(\s|$)', ' ', flags)
- _CONFIG_VARS[key] = flags
+ import _osx_support
+ _osx_support.customize_config_vars(_CONFIG_VARS)
if args:
vals = []
@@ -656,92 +603,10 @@
if m:
release = m.group()
elif osname[:6] == "darwin":
- #
- # For our purposes, we'll assume that the system version from
- # distutils' perspective is what MACOSX_DEPLOYMENT_TARGET is set
- # to. This makes the compatibility story a bit more sane because the
- # machine is going to compile and link as if it were
- # MACOSX_DEPLOYMENT_TARGET.
- #
- cfgvars = get_config_vars()
- macver = cfgvars.get('MACOSX_DEPLOYMENT_TARGET')
-
- if 1:
- # Always calculate the release of the running machine,
- # needed to determine if we can build fat binaries or not.
-
- macrelease = macver
- # Get the system version. Reading this plist is a documented
- # way to get the system version (see the documentation for
- # the Gestalt Manager)
- try:
- f = open('/System/Library/CoreServices/SystemVersion.plist')
- except IOError:
- # We're on a plain darwin box, fall back to the default
- # behaviour.
- pass
- else:
- try:
- m = re.search(
- r'<key>ProductUserVisibleVersion</key>\s*' +
- r'<string>(.*?)</string>', f.read())
- if m is not None:
- macrelease = '.'.join(m.group(1).split('.')[:2])
- # else: fall back to the default behaviour
- finally:
- f.close()
-
- if not macver:
- macver = macrelease
-
- if macver:
- release = macver
- osname = "macosx"
-
- if (macrelease + '.') >= '10.4.' and \
- '-arch' in get_config_vars().get('CFLAGS', '').strip():
- # The universal build will build fat binaries, but not on
- # systems before 10.4
- #
- # Try to detect 4-way universal builds, those have machine-type
- # 'universal' instead of 'fat'.
-
- machine = 'fat'
- cflags = get_config_vars().get('CFLAGS')
-
- archs = re.findall('-arch\s+(\S+)', cflags)
- archs = tuple(sorted(set(archs)))
-
- if len(archs) == 1:
- machine = archs[0]
- elif archs == ('i386', 'ppc'):
- machine = 'fat'
- elif archs == ('i386', 'x86_64'):
- machine = 'intel'
- elif archs == ('i386', 'ppc', 'x86_64'):
- machine = 'fat3'
- elif archs == ('ppc64', 'x86_64'):
- machine = 'fat64'
- elif archs == ('i386', 'ppc', 'ppc64', 'x86_64'):
- machine = 'universal'
- else:
- raise ValueError(
- "Don't know machine value for archs=%r"%(archs,))
-
- elif machine == 'i386':
- # On OSX the machine type returned by uname is always the
- # 32-bit variant, even if the executable architecture is
- # the 64-bit variant
- if sys.maxsize >= 2**32:
- machine = 'x86_64'
-
- elif machine in ('PowerPC', 'Power_Macintosh'):
- # Pick a sane name for the PPC architecture.
- # See 'i386' case
- if sys.maxsize >= 2**32:
- machine = 'ppc64'
- else:
- machine = 'ppc'
+ import _osx_support
+ osname, release, machine = _osx_support.get_platform_osx(
+ get_config_vars(),
+ osname, release, machine)
return "%s-%s-%s" % (osname, release, machine)