During the configuration process in preparation to build a new release of perl on your system, there are a number of questions and settings that refer to the location of libraries. Essentially, these paths are "Compiled In"; however, you can always change the default during the build.

A nifty build trick is to add library paths to be added to the front of the @INC path, thus overriding the built-ins with your own modules, should you choose to do so.

The relevant portion of code is 

sh Configure -Accflags='-DAPPLLIB_EXP=\"/other/lib/dir\"'

[download]
as per the CPAN Install - Build and Installation guide for perl5 page.

-v
"Perl. There is no substitute."

In reply to Re: How is the default @INC constructed? by Velaki
in thread How is the default @INC constructed? by johnnywang

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