old_contents: import os
  from distutils.core import Command
  from distutils.ccompiler import new_compiler
  from numpy.distutils.misc_util import get_cmd
  
  class install_clib(Command):
      description = "Command to install installable C libraries"
  
      user_options = []
  
      def initialize_options(self):
          self.install_dir = None
          self.outfiles = []
  
      def finalize_options(self):
          self.set_undefined_options('install', ('install_lib', 'install_dir'))
  
      def run (self):
          # We need the compiler to get the library name -> filename association
          compiler = new_compiler(compiler=None)
          compiler.customize(self.distribution)
  
          build_dir = get_cmd("build_clib").build_clib
  
          for l in self.distribution.installed_libraries:
              target_dir = os.path.join(self.install_dir, l.target_dir)
              name = compiler.library_filename(l.name)
              source = os.path.join(build_dir, name)
              self.mkpath(target_dir)
              self.outfiles.append(self.copy_file(source, target_dir)[0])
  
      def get_outputs(self):
          return self.outfiles
  
new_contents: import os
  from distutils.core import Command
  from distutils.ccompiler import new_compiler
  from numpy.distutils.misc_util import get_cmd
  
  class install_clib(Command):
      description = "Command to install installable C libraries"
  
      user_options = []
  
      def initialize_options(self):
          self.install_dir = None
          self.outfiles = []
  
      def finalize_options(self):
          self.set_undefined_options('install', ('install_lib', 'install_dir'))
  
      def run (self):
          build_clib_cmd = get_cmd("build_clib")
          build_dir = build_clib_cmd.build_clib
  
          # We need the compiler to get the library name -> filename association
          if not build_clib_cmd.compiler:
              compiler = new_compiler(compiler=None)
              compiler.customize(self.distribution)
          else:
              compiler = build_clib.compiler
  
          for l in self.distribution.installed_libraries:
              target_dir = os.path.join(self.install_dir, l.target_dir)
              name = compiler.library_filename(l.name)
              source = os.path.join(build_dir, name)
              self.mkpath(target_dir)
              self.outfiles.append(self.copy_file(source, target_dir)[0])
  
      def get_outputs(self):
          return self.outfiles
  
subject: fix install_clib failure on win32.