Hi,

Efraim Flashner <efr...@flashner.co.il> writes:

>> > 2. Cross compile them from x86_64-linux, add the outputs into a git
>> > repository, distribute them with ‘guix time-machine’ invocations and
>> > hashes recorded.
>
> Tossing them into a git repository wouldn't be that great for the git
> repository.

We could upload them to ftp.gnu.org/gnu/guix/bootstrap with the other
bootstrapping seeds.

>> > 3. In Guix, download these outputs and use them to bootstrap those not
>> > yet supported architectures.
>> 
>> Sounds reasonable, but only if we cannot support those architectures
>> natively IMO.
>
> I actually got fairly close on rust-1.54 for i686-linux.  Ignoring that
> for the moment, unless/until GHC upstream releases prebuilt binaries for
> more architectures we have no other way of supporting some of our
> architectures.
>
> What would it look like for people who have substitutes turned off?

Those binaries would be “cut” from the dependency graph: we’d
cross-compile them from x86_64 and upload them to ftp.gnu.org.  Then
someone using Guix on those architectures would simply download these
pre-built binaries.

It’s clearly not ideal: it would be great if we had instead a bootstrap
path for those compilers on those architectures.  But, in the absence of
such a path, using those binaries cross-built from source is better than
using opaque pre-built binaries provided by upstream.

Thanks,
Ludo’.

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