$ podgrep typeglob `basepods`
$ basepods | grep delt
/usr/local/devperl/lib/5.00554/pod/perl5004delta.pod
/usr/local/devperl/lib/5.00554/pod/perl5005delta.pod
/usr/local/devperl/lib/5.00554/pod/perldelta.pod
You can also run this using alternate perl binaries, like so:
$ oldperl -S basepods | grep delt
/usr/lib/perl5/pod/perldelta.pod
$ podgrep -i thread `filsperl basepods | grep delt`
....
This is free software. You may modify it and distribute it under Perl's Artistic Licence. Modified versions must be clearly indicated.