code: def get_makefile_filename():
      
      if _PYTHON_BUILD:
          return os.path.join(_PROJECT_BASE, "Makefile")
      if hasattr(sys, 'abiflags'):
          config_dir_name = 'config-%s%s' % (_PY_VERSION_SHORT, sys.abiflags)
      else:
          config_dir_name = 'config'
      return os.path.join(get_path('stdlib'), config_dir_name, 'Makefile')
docs: Return the path of the Makefile.