CPAN's Config.pm almost always overrides Perl's Config.pm and Config_heavy.pm, but that's almost some modules sometimes ignore the parameters CPAN hands to the make utility and ask Perl (usually via use Config; in Makefile.PL) directly for things, often resulting in the compile borking.

I'm looking at you Glib...

In reply to Re^4: Changing Perl compile-time configuration settings by Bloodrage
in thread Changing Perl compile-time configuration settings by Bloodrage

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