[Python-Dev] distutils doesn't use some compiler options when building (original) (raw)
Akira Kitada akitada at gmail.com
Wed Nov 26 18:28:47 CET 2008
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Hi,
I encountered a weird problem using distutils. Generally, distutils try to use the same compiler options used for building Python interpreter, but it looks like some of them are omitted sometimes.
- CPPFLAGS are not retrieved from the config and only ones in env are used.
- OPT is retrieved from the config, but it's only used when env has CFLAGS.
See: http://svn.python.org/view/python/trunk/Lib/distutils/sysconfig.py
"""
def customize_compiler(compiler):
...
if compiler.compiler_type == "unix":
(cc, cxx, opt, cflags, ccshared, ldshared, so_ext) =
get_config_vars('CC', 'CXX', 'OPT', 'CFLAGS',
'CCSHARED', 'LDSHARED', 'SO')
if 'CC' in os.environ:
cc = os.environ['CC']
if 'CXX' in os.environ:
cxx = os.environ['CXX']
if 'LDSHARED' in os.environ:
ldshared = os.environ['LDSHARED']
if 'CPP' in os.environ:
cpp = os.environ['CPP']
else:
cpp = cc + " -E" # not always
if 'LDFLAGS' in os.environ:
ldshared = ldshared + ' ' + os.environ['LDFLAGS']
if 'CFLAGS' in os.environ:
cflags = opt + ' ' + os.environ['CFLAGS']
ldshared = ldshared + ' ' + os.environ['CFLAGS']
if 'CPPFLAGS' in os.environ:
cpp = cpp + ' ' + os.environ['CPPFLAGS']
cflags = cflags + ' ' + os.environ['CPPFLAGS']
ldshared = ldshared + ' ' + os.environ['CPPFLAGS']
cc_cmd = cc + ' ' + cflags
compiler.set_executables(
preprocessor=cpp,
compiler=cc_cmd,
compiler_so=cc_cmd + ' ' + ccshared,
compiler_cxx=cxx,
linker_so=ldshared,
linker_exe=cc)
compiler.shared_lib_extension = so_ext"""
Are these logics are intentional or just a bug? If this is intentional behavior, why is that being this way?
Thanks,
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