editing the search path for '#include' preprocessor

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
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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).

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On Wed, Jun 27, 2007 at 03:35:46PM +0530, sameer gupta
wrote:
>  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

You can set environment variables to help GCC find include
files and
libraries in your shell's startup script. For include files
you can set
CPATH, for libraries you'll need to set LIBRARY_PATH. See
http://gcc.gnu.org/onlinedocs/gcc/Environment-Variab
les.html

Both can contain different paths separated by a colon (.

How to set environment variables depends on the shell you
use. csh uses
the 'set' command, while sh and bash use 'export'. See your
shell's
manual page for details.

Roland
-- 
R.F.Smith                                   http://www.xs4all.nl/~r
smith/
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