bug#45455: [nextstep]: Emacs master does not compile on Apple Silicon (arm64)

[Artem Loenko]

On 28 Dec 2020, at 03:27, Eli Zaretskii <eliz@gnu.org> wrote:

Date: Sun, 27 Dec 2020 21:37:23 +0000
Cc: 45455@debbugs.gnu.org
From: Artem Loenko via "Bug reports for GNU Emacs,
the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>

I see two options:

- Backport `arm64:Darwin:*:*)` support within `config.guess` to emacs-27 branch and switch to
`aarch64-apple-darwin` everywhere
- Do not backport, but switch to `aarch64-apple-darwin` everywhere anyway :)

What do you think?

The latter, please.  It's too late to backport config.guess to the
release branch, and I see no good reason to do so.

Then the patch in the initial message will do. We have to apply it to the master and emacs-27 (if there will be more releases from it) branches. I just checked, Emacs compiles fine on both branches with the patch on Apple Silicon. Or we can revert the following commit – https://git.savannah.gnu.org/cgit/emacs.git/commit/?h=emacs-27&id=fda9b3e83a434706c31ab1bee5c15511c0181d5a

Philipp, are okay with this?