class Rake::ExtensionTask

def make
  unless @make
    @make =
      if RUBY_PLATFORM =~ /mswin/ then
        'nmake'
      else
        ENV['MAKE'] || find_make
      end
  end
  unless @make
    raise "Couldn't find a suitable `make` tool. Use `MAKE` env to set an alternative."
  end
  @make
end