(After all why would anyone distribute the .a lib together with a perl that has that same module linked in? Doesn't make any sense.)
The .a lib is distributed with static modules so you can build additional static modules later (which needs to relink perl with all the previous .a libs).

In reply to Re^2: Breaking a Filter::decrypt like source filter by ysth
in thread Breaking a Filter::decrypt like source filter by olego

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