class MiniPortile

def configured?
  configure = File.join((source_directory || work_path), 'configure')
  makefile  = File.join(work_path, 'Makefile')
  cache_file  = File.join(tmp_path, 'configure.options_cache')
  stored_options  = File.exist?(cache_file) ? File.read(cache_file) : ""
  current_options = computed_options.to_s
  (current_options == stored_options) && newer?(makefile, configure)
end