in reply to Re^3: Changing Perl compile-time configuration settings
in thread Changing Perl compile-time configuration settings

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...