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-rw-r--r--setup.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/setup.py b/setup.py
index d768c65bf6..7836d263fb 100644
--- a/setup.py
+++ b/setup.py
@@ -302,7 +302,8 @@ class PyBuildExt(build_ext):
# 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)
+ env_val = re.sub(r'(^|\s+)-(-|(?!%s))' % arg_name[1],
+ ' ', env_val)
parser = optparse.OptionParser()
# Make sure that allowing args interspersed with options is
# allowed