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 2.7 branch (for release in 2.7.4)
* 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/distutils/unixccompiler.py b/Lib/distutils/unixccompiler.py
index c49ac9b..2aa1cb1 100644
--- a/Lib/distutils/unixccompiler.py
+++ b/Lib/distutils/unixccompiler.py
@@ -26,6 +26,9 @@
DistutilsExecError, CompileError, LibError, LinkError
from distutils import log
+if sys.platform == 'darwin':
+ import _osx_support
+
# XXX Things not currently handled:
# * optimization/debug/warning flags; we just use whatever's in Python's
# Makefile and live with it. Is this adequate? If not, we might
@@ -41,68 +44,6 @@
# should just happily stuff them into the preprocessor/compiler/linker
# options and carry on.
-def _darwin_compiler_fixup(compiler_so, cc_args):
- """
- This function will strip '-isysroot PATH' and '-arch ARCH' from the
- compile flags if the user has specified one them in extra_compile_flags.
-
- This is needed because '-arch ARCH' adds another architecture to the
- build, without a way to remove an architecture. Furthermore GCC will
- barf if multiple '-isysroot' arguments are present.
- """
- stripArch = stripSysroot = 0
-
- compiler_so = list(compiler_so)
- kernel_version = os.uname()[2] # 8.4.3
- major_version = int(kernel_version.split('.')[0])
-
- if major_version < 8:
- # OSX before 10.4.0, these don't support -arch and -isysroot at
- # all.
- stripArch = stripSysroot = True
- else:
- stripArch = '-arch' in cc_args
- stripSysroot = '-isysroot' in cc_args
-
- if stripArch or 'ARCHFLAGS' in os.environ:
- while 1:
- try:
- index = compiler_so.index('-arch')
- # Strip this argument and the next one:
- del compiler_so[index:index+2]
- except ValueError:
- break
-
- if 'ARCHFLAGS' in os.environ and not stripArch:
- # User specified different -arch flags in the environ,
- # see also distutils.sysconfig
- compiler_so = compiler_so + os.environ['ARCHFLAGS'].split()
-
- if stripSysroot:
- try:
- index = compiler_so.index('-isysroot')
- # Strip this argument and the next one:
- del compiler_so[index:index+2]
- except ValueError:
- pass
-
- # Check if the SDK that is used during compilation actually exists,
- # the universal build requires the usage of a universal SDK and not all
- # users have that installed by default.
- sysroot = None
- if '-isysroot' in cc_args:
- idx = cc_args.index('-isysroot')
- sysroot = cc_args[idx+1]
- elif '-isysroot' in compiler_so:
- idx = compiler_so.index('-isysroot')
- sysroot = compiler_so[idx+1]
-
- if sysroot and not os.path.isdir(sysroot):
- log.warn("Compiling with an SDK that doesn't seem to exist: %s",
- sysroot)
- log.warn("Please check your Xcode installation")
-
- return compiler_so
class UnixCCompiler(CCompiler):
@@ -172,7 +113,8 @@
def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
compiler_so = self.compiler_so
if sys.platform == 'darwin':
- compiler_so = _darwin_compiler_fixup(compiler_so, cc_args + extra_postargs)
+ compiler_so = _osx_support.compiler_fixup(compiler_so,
+ cc_args + extra_postargs)
try:
self.spawn(compiler_so + cc_args + [src, '-o', obj] +
extra_postargs)
@@ -251,7 +193,7 @@
linker[i] = self.compiler_cxx[i]
if sys.platform == 'darwin':
- linker = _darwin_compiler_fixup(linker, ld_args)
+ linker = _osx_support.compiler_fixup(linker, ld_args)
self.spawn(linker + ld_args)
except DistutilsExecError, msg: