From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Initial cross-compilation support
Date: Sat, 25 May 2013 00:04:35 +0200
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In-Reply-To: <87txoxv7x9.fsf@gnu.org> ("Ludovic
	\=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
	\=\?utf-8\?Q\?s\?\= message of "Wed, 27 Feb 2013 21:05:54 +0100")
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Hello!

ludo@gnu.org (Ludovic Court=C3=A8s) skribis:

> Commit 827d289 of the =E2=80=98core-updates=E2=80=99 branch adds cross-ba=
se.scm, which
> builds a cross tool chain.
>
> So if you type =E2=80=98guix build gcc-cross-mips64el-linux-gnu=E2=80=99,=
 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=3Dcore-updates&id=3D827d28914a16ef2d10=
ebdad4695efdb02ace07fb
>
> The end goal is to be able to run:
>
>   guix build --target=3Dmips64el-linux-gnu coreutils
>
> and get a cross-built Coreutils.

Here we are!  :-)

So far I=E2=80=99ve only tested with =E2=80=9Csimple=E2=80=9D cases, namely=
 GMP/MPFR/MPC, and it
all cross-builds correctly for mips64el-linux-gnu (N32).  I=E2=80=99ve chan=
ged
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=E2=80=99.