Customizing include path with CPAN install

From: Alain (aleblan1_at_rochester.rr.com)
Date: 11/22/04 

Date: 22 Nov 2004 08:46:05 -0800

Hi,

I'm trying to install some module using the install command in CPAN.
The module requires some external .h file which I just added to a new
directory (/usr/local2/include). However I can't find any
documentation on how to get the make program to look in this directory
as well as the default /usr/local/include. Anyone knows where perl
looks for this information, and how to modify it?

Thanks,

Alain