bug#54864: GNU Cuirass reports arm64 as armhf

[zimoun <zimon.toutoune@gmail.com>]

Hi,

On Tue, 26 Apr 2022 at 10:00, Mathieu Othacehe <othacehe@gnu.org> wrote:
> > I've had this experience before, it's very confusing (it goes on trying
> > to build a toolchain for something that is sure to fail).  Perhaps we
> > could at least have a place to refer to in the manual for the common GNU
> > triplets which make the most sense in for GNU Guix (e.g., the currently
> > supported GNU system triplets).  Currently I grep the manual for
> > disparate examples when my memory fail me.

[...]

> * Define all the supported architectures in (gnu platforms). We already
>   have ARM and Hurd defined there.
>
> * Define %supported-systems and %supported-targets lists constructed by
>   parsing the <platform> records.
>
> * Use those lists to check the values passed to --system and --target
>   arguments.
>
> * Add --list-available-systems and --list-available-targets arguments
>   for all the commands supporting --system and --target arguments.

I agree.  It would ease the dance.

In addition, it would help to have a subsection in the manual about
"cross-compilation"; maybe under the Development section.  For
instance, I do not find clear the difference between 'system' and
'target'.  And the explanations for the triplet are outside the Guix
manual, pointing to [1] which I do not find very clear.  Something
like an explicit list of possible values for this triplet would be
worth.


1: <https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.71/autoconf.html#Specifying-target-triplets>

Cheers,
simon