One option is to use a module like Log::Log4Perl. You can set several levels of messages (debug, info, etc.) and only the ones at or above the current priority level (as defined at start time in a config file) will print. The output can be directed to standard error or a file, also. 
  $log->debug("Debug message");
  $log->info("Info message");
  $log->error("Error message");

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In reply to Re: Debug flags by tall_man
in thread Debug flags by sparkel

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