From the Log::Log4perl documentation:

Resurrecting hidden Log4perl Statements

Sometimes scripts need to be deployed in environments without having Log::Log4perl installed yet. On the other hand, you dont't want to live without your Log4perl statements -- they're gonna come in handy later.

So, just deploy your script with Log4perl statements commented out with the pattern "###l4p", like in 

    ###l4p DEBUG "It works!";
    # ...
    ###l4p INFO "Really!";

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If Log::Log4perl is available, use the ":resurrect" tag to have Log4perl resurrect those burried statements before the script starts running: 
    use Log::Log4perl qw(:resurrect :easy);

    ###l4p Log::Log4perl->easy_init($DEBUG);
    ###l4p DEBUG "It works!";
    # ...
    ###l4p INFO "Really!";

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This will have a source filter kick in and indeed print 
    2004/11/18 22:08:46 It works!
    2004/11/18 22:08:46 Really!

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In reply to Re: Seeking defined() for compile time by saintmike
in thread Seeking defined() for compile time by hesco

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