getopt.add_option('C', "chdir", work_dir, GetOpt::REQUIRED_ARG).set_help("Change to DIR before doing anything else.", "DIR");
getopt.add_option('P', "progress", show_progress, GetOpt::NO_ARG).set_help("Display progress while building.");
getopt.add_option('W', "what-if", what_if, GetOpt::REQUIRED_ARG).set_help("Pretend that FILE has changed.", "FILE");
getopt.add_option('C', "chdir", work_dir, GetOpt::REQUIRED_ARG).set_help("Change to DIR before doing anything else.", "DIR");
getopt.add_option('P', "progress", show_progress, GetOpt::NO_ARG).set_help("Display progress while building.");
getopt.add_option('W', "what-if", what_if, GetOpt::REQUIRED_ARG).set_help("Pretend that FILE has changed.", "FILE");