Re: Initial cross-compilation support

[Ludovic Courtès]

Hello!

address@hidden (Ludovic Courtès) skribis:

> Commit 827d289 of the ‘core-updates’ branch adds cross-base.scm, which
> builds a cross tool chain.
>
> So if you type ‘guix build gcc-cross-mips64el-linux-gnu’, you get a
> cross-compiler (+ libc, binutils) for that platform.  The compiler is
> slightly modified by this patch:
>
>   
> http://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/patches/gcc-cross-environment-variables.patch?h=core-updates&id=827d28914a16ef2d10ebdad4695efdb02ace07fb
>
> The end goal is to be able to run:
>
>   guix build --target=mips64el-linux-gnu coreutils
>
> and get a cross-built Coreutils.

Here we are!  :-)

So far I’ve only tested with “simple” cases, namely GMP/MPFR/MPC, and it
all cross-builds correctly for mips64el-linux-gnu (N32).  I’ve changed
hydra.scm so that Hydra cross-builds a few packages for us.  Probably
package definitions and perhaps build systems will need to be adjusted
to allow cross-compilation of more packages, but the foundations are in
place.

Comments and bug reports welcome!

Ludo’.