Patch #413912 from Steve Majewski: Add .m to the list of extensions
    in order to support Objective-C.
diff --git a/Lib/distutils/unixccompiler.py b/Lib/distutils/unixccompiler.py
index f7eb93a..9ecfb6d 100644
--- a/Lib/distutils/unixccompiler.py
+++ b/Lib/distutils/unixccompiler.py
@@ -67,7 +67,7 @@
     # reasonable common default here, but it's not necessarily used on all
     # Unices!
 
-    src_extensions = [".c",".C",".cc",".cxx",".cpp"]
+    src_extensions = [".c",".C",".cc",".cxx",".cpp",".m"]
     obj_extension = ".o"
     static_lib_extension = ".a"
     shared_lib_extension = ".so"