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-rw-r--r--Lib/distutils/command/build_ext.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/Lib/distutils/command/build_ext.py b/Lib/distutils/command/build_ext.py
index aca6dac407c..4d779b82645 100644
--- a/Lib/distutils/command/build_ext.py
+++ b/Lib/distutils/command/build_ext.py
@@ -278,7 +278,9 @@ class build_ext (Command):
'extra_objects',
'extra_compile_args',
'extra_link_args'):
- setattr(ext, key, build_info.get(key))
+ val = build_info.get(key)
+ if val is not None:
+ setattr(ext, key, val)
# Medium-easy stuff: same syntax/semantics, different names.
ext.runtime_library_dirs = build_info.get('rpath')