Here's a patch for distutils/msvccompiler.py to ensure that the appropriate Python import library (e.g. "python15.lib" or "python15_d.lib") is linked in with your extension DLL on Windows. As my comment indicates, there's probably a cleaner way to pick up the correct library name but this should work for Python 1.5.x and Python 1.6. Index: msvccompiler.py =================================================================== RCS file: /projects/cvsroot/distutils/distutils/msvccompiler.py,v retrieving revision 1.25 diff -c -r1.25 msvccompiler.py *** msvccompiler.py 2000/03/31 19:04:25 1.25 --- msvccompiler.py 2000/04/12 22:43:28 *************** *** 329,334 **** --- 329,346 ---- extra_preargs=None, extra_postargs=None): + # Add the Python library to the standard library list. + # There's probably a more elegant way to determine the correct name ;) + if sys.winver == '1.5': + pythonlib = 'python15' + else: + pythonlib = 'python16' + + if debug: + pythonlib = pythonlib + '_d' + + self.add_library(pythonlib) + (objects, output_dir) = self._fix_object_args (objects, output_dir) (libraries, library_dirs, runtime_library_dirs) = \ self._fix_lib_args (libraries, library_dirs, runtime_library_dirs)