[bug#55220] [PATCH 0/4] Add --list-systems and --list-targets options.

[Mathieu Othacehe]

> Maybe expose it as a memoizing procedure thunk called ‘platforms’, for
> consistency with the names ‘systems’ and ‘targets’.

Done.

> Or ‘supported-systems’ and ‘supported-targets’?

That would clash with the supported-systems field of <package>.

But by the way, there's already a %supported-systems in (guix packages)
that I would like to replace by systems. However importing (gnu
platform) from there seems problematic.

Thanks,

Mathieu