On Sun, 09 Feb 2020 17:46:51 +0100, Jan Stary wrote: > Whenever unistd.h declares getopt(3), it also declares > the extern optind and optarg, so files including unistd.h > don't need to declare those themselves, right?
Correct. Most of those date back from before optind and optarg were defined for you by unistd.h. - todd
