here's something i just came up with. if you have the module My::Module, it will check for MY_MODULE_DEBUG. 
use constant DEBUG => do {
    (my $p = __PACKAGE__ ) =~ tr/a-z:/A-Z_/s;
    $ENV{ $p . '_DEBUG' } || 0;
};

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In reply to how do you check if it's compiled away? by Anonymous Monk
in thread removing debugging code at compile time ? by rootcho

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