http://www.perlmonks.org?node_id=11120806


in reply to Inconsistent behavior of Getopt::Std

Getopt::Std is using the conventions traditionally used by Unix commands. For someone who's been using Unix/Linux for a long time, it's consistent with with the other(non-GNU) command's option parsing, with all of it's warts.

Getopt::Long follows the newer GNU conventions and may be closer to what you're expecting.