# File lib/rake/extensiontask.rb, line 77
    def cross_config_options(for_platform=nil)
      return @cross_config_options unless for_platform

      # apply options for this platform, only
      @cross_config_options.map do |option|
        if option.kind_of?(Hash)
          option[for_platform] || []
        else
          option
        end
      end.flatten
    end