[Soc-coordination] Final report — Multiarch cross-toolchains

[Thibaut Girka]

On Mon, Aug 20, 2012 at 08:41:19AM +0200, Marcin Juszkiewicz wrote:
> W dniu 19.08.2012 21:42, Thibaut Girka pisze:
> 
> > I have given thought about how cross-compilers could be built 
> > automatically, but I haven't found out a good way to do that yet. It
> >  is impossible to build multiarch cross-toolchains as part of the 
> > normal build of gcc, since src:gcc-4.7 would then require 
> > libgcc1:$host and (libgcc1:$target for each $target in the targets 
> > list) to be of the same version.
> 
> Also when cross build for arch X fails then whole package fails.

Right.

> > Another solution would be to have another source package, responsible
> > for building cross-compilers from gcc's source package. As far as I
> > know, that's how it is done for ubuntu, but apt-get sourcing gcc-4.7
> > from a source package feels wrong to me...
> 
> I went that way with gcc-4.[4-7]-armel-cross in Ubuntu. Easy, simple,
> some packages mangling required. Same way with binutils-armel-cross. So
> please take a look at them.

I took a look at them! Although I have to admit I only remember looking
at the “armel-cross-toolchain-base” branch, which boostraps the whole thing.

Now, I'm looking at the “gcc-4.x-cross” branch, and it is really close to
what I had in mind. I would like to avoid the duplication in the control file
and override files, though... I'll think about that, but it's post-GSoC, now ;)

Regards,
Thibaut Girka.
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