# File lib/rubygems.rb, line 152
    def bindir(install_dir=Gem.dir)
      return File.join(install_dir, 'bin') unless install_dir == Gem.default_dir

      if defined? RUBY_FRAMEWORK_VERSION then # mac framework support
        File.join(File.dirname(Config::CONFIG["sitedir"]),
                  File.basename(Config::CONFIG["bindir"]))
      else # generic install
        Config::CONFIG['bindir']
      end
    end