how to set standard system include directory

[Gavin Li]

I want to add /usr/mylocal/include to standard system include directory, but
don't want to use -I/usr/mylocal/include, How can I make it.

The problem is I compiled library A, and installed to /usr/mylocal/include,
and then compile library B, which depends on A, so I have to make sure
configure program search headers in /usr/mylocal/include first, then other
standard system include directory. My system has another version A which
comes from the Fedora release, and I don't want B to use headers from this
Fedora release.

Thanks.

[Mike McCarty]

Gavin Li wrote:
> I want to add /usr/mylocal/include to standard system include directory, but
> don't want to use -I/usr/mylocal/include, How can I make it.
>
> The problem is I compiled library A, and installed to /usr/mylocal/include,
> and then compile library B, which depends on A, so I have to make sure
> configure program search headers in /usr/mylocal/include first, then other
> standard system include directory. My system has another version A which
> comes from the Fedora release, and I don't want B to use headers from this
> Fedora release.

The usual way to handle this is to use a makefile.
If you use gcc, then another way is via the environment variable
C_INCLUDE_PATH

Mike