I wasn't looking to change the source code -- or I don't understand the purpose of the grep?

The purpose of grepping the source is to find what you're looking for, info on PREFIX ... as you can see from the results the perlfaq contains info on it among other places

In reply to Re^3: How to change idea of perl's install PREFIX after compilation? by Anonymous Monk
in thread How to change idea of perl's install PREFIX after compilation? by perl-diddler

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