fixinc w/ SYSTEM_INCLUDE_DIR set?

[Robert Lipe]

>  > I'm working on a target that will need to set SYSTEM_INCLUDE_DIR.  There
>  > is a /usr/include, but they are toxic to this target and must never be
>  > touched.   Unfortunately, the target of SYSTEM_INCLUDE_DIR is also toxic
>  > enough that it needs to have fixincludes run on it.
>  > 
> How about putting it into config/<target>/t-<your-particular-system>:
> SYSTEM_HEADER_DIR = /where/ever/your/include/files/are

Aaaah, yes.  That's the way I'll implement it.  I now see some prior art
in the config files for this.

Thanx for the tip.   

RJL