a) Use the debugger. 
PERLDB_OPTS="NonStop AutoTrace LineInfo=lines frame=1" perl -d script.
+pl
less lines

[download]
b) use warnings and not -w, to turn warnings only on in your modul/script.
c) build some magic around your subs with Hook::LexWrap or a similar module to do something on sub entry or exit.
Boris

In reply to Re: Turning on debug/verbosity in modules that are sub-called by borisz
in thread Turning on debug/verbosity in modules that are sub-called by hacker

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