All the option parsing is done in functions called by the macros. The "getopt string" isn't needed since the GETOPT_OPT() and GETOPT_OPTARG() "case statements"

All the option parsing is done in functions called by the macros. The "getopt string" isn't needed since the GETOPT_OPT() and GETOPT_OPTARG() "case statements" convey the same information (the set of valid options).