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Date: Wed, 27 Jun 2007 08:10:57 -0500
From: Reid Linnemann <lreid@cs.okstate.edu>
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To: sameer gupta <sameersmail@gmail.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: editing the search path for '#include' preprocessor
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Written by sameer gupta on 06/27/07 05:05>>
> hello,
> i want to add new search path's for including  more directories for header
> files, for that i need to edit the makefile that my gcc compiler uses,
> however i cant figure out where to find that file, kindly help..i'm a 
> newbie
> who has just started out
> regards,
> sameer

If you're wanting to add system include paths permanently to gcc, AFAIK 
you'll have to edit /usr/src/contrib/gcc/cppdefaults.c and add the paths 
you want to the cpp_include_defaults array. However, cpp already has a 
non-invasive way of supplying extra include paths with the -I flag, or 
you can set the CPATH environemtn vairable to the paths you would like 
to search (its form is exactly like that of PATH).