$ perl -v

This is perl 5, version 18, subversion 1 (v5.18.1) built for darwin-thread-multi-2level
...

##</code><code>##

$ /usr/bin/perl -v

This is perl 5, version 12, subversion 3 (v5.12.3) built for darwin-thread-multi-2level
(with 2 registered patches, see perl -V for more detail)
...

##</code><code>##

#!/usr/bin/env perl

##</code><code>##

#!/usr/bin/env perl -l