textproc/p5-POSIX-Regex 1.0003_1 DragonFly

This is a port of the glibc gnu regex engine into perl. There are few reasons you would need this. The few I can think of include:

0. You wish to use untrusted user expressions in such a way as to be able to catch errors. Example: eval { alarm 2; m/((){1024}){1024}/ } is an instant uncatchable segmentation fault. GNU's regexps will still fail, but in a timeout way rather than an instant segfault way.

1. You wish to have POSIX compliance on ... something ... Perl's regexps are slightly different -- arguably better, but different.