problem with 'pyext/cpp_message.py'

[littmus]

When I install protobuf python lib with README's instruction, 'pyext/cpp_message.py' never included into egg.
I just did

python setup.py build --cpp_implementation
python setup.py install --cpp_implementation

By several tries, I manually put put file like this in setup.py

py_modules = [
          'google.protobuf.internal.api_implementation',
          'google.protobuf.internal.containers',
          'google.protobuf.internal.cpp_message',
          'google.protobuf.internal.decoder',
          'google.protobuf.internal.encoder',
          'google.protobuf.internal.enum_type_wrapper',
          'google.protobuf.internal.message_listener',
          'google.protobuf.internal.python_message',
          'google.protobuf.internal.type_checkers',
          'google.protobuf.internal.wire_format',

          'google.protobuf.pyext.cpp_message',

          'google.protobuf.descriptor',
          'google.protobuf.descriptor_pb2',
          'google.protobuf.compiler.plugin_pb2',
          'google.protobuf.message',
          'google.protobuf.descriptor_database',
          'google.protobuf.descriptor_pool',
          'google.protobuf.message_factory',
          'google.protobuf.reflection',
          'google.protobuf.service',
          'google.protobuf.service_reflection',
          'google.protobuf.symbol_database',
          'google.protobuf.text_encoding',
          'google.protobuf.text_format'],

and now it works well with using cpp option.

Is there any special install options that I didn't know or any instructions I forgot?

Thanks.

[xfxyjwf]

duplicate of issue #34