There are some non-free tools that can help you. For instance, ActiveState has a full-fledged Perl IDE that will organize the code into modules/packages graphically, and from which you can do a lot of code-analyzing (what is called by what, etc).

There are a few other Perl IDEs online.

In reply to Re: Analyzing large Perl code base. by spurperl
in thread Analyzing large Perl code base. by dmitri

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