Re: [PATCH 01/10] gnu: cross: Use CROSS_*_INCLUDE_PATH for system headers.

[Ludovic Courtès]

Andy Wingo <address@hidden> skribis:

> One final ignorant question: there really is no way to do this without
> patching GCC?

Unfortunately no.  Currently, both a native compiler and a cross
compiler honor CPATH, LIBRARY_PATH, etc., meaning that they cannot be
used at all in a cross-compilation environment.

I think we should push some more for inclusion of this functionality
upstream.

> And why just one CROSS_C_INCLUDE_PATH -- would it not be necessary in
> theory to have such a CROSS_ARCH_... for each ARCH that we might be
> interested in?  I am not suggesting that you make the change now but I
> want to know what the right thing is :)

In theory, you’re right.  That’s one of the concerns that was raised:

  http://gcc.gnu.org/ml/gcc/2013-02/msg00125.html

I don’t think it’s a common use case though.

Thanks for taking the time to review, BTW!

Ludo’.