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bpo-45221: Fix handling of LDFLAGS and CPPFLAGS options in setup.py (GH-29031)

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andrei kulakov 2021-10-18 14:26:23 -04:00 • committed by GitHub
parent 034f607906
commit 6a533a4238
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12
setup.py
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@ -801,6 +801,18 @@ class PyBuildExt(build_ext):
if env_val:
parser = argparse.ArgumentParser()
parser.add_argument(arg_name, dest="dirs", action="append")
# To prevent argparse from raising an exception about any
# options in env_val that it mistakes for known option, we
# strip out all double dashes and any dashes followed by a
# character that is not for the option we are dealing with.
#
# Please note that order of the regex is important! We must
# strip out double-dashes first so that we don't end up with
# substituting "--Long" to "-Long" and thus lead to "ong" being
# used for a library directory.
env_val = re.sub(r'(^|\s+)-(-|(?!%s))' % arg_name[1],
' ', env_val)
options, _ = parser.parse_known_args(env_val.split())
if options.dirs:
for directory in reversed(options.dirs):