bug#43369: Emacs fails to configure on ARM Macs

[Itai Seggev]

On Sun, Sep 13, 2020 at 05:07:43PM +0100, Alan Third wrote:
> On Sun, Sep 13, 2020 at 03:41:16PM +0200, Lars Ingebrigtsen wrote:
> > 
> > The arm-* bit was added recently to Emacs, from a two-year-old patch:
> > 
> > commit 4cba236749aafade7bd88cf2a10be48f44983faa
> > Author:     Roland Kaufmann <rlndkfmn+emacs@gmail.com>
> > AuthorDate: Thu Dec 27 15:51:49 2018 +0100
> > Commit:     Alan Third <alan@idiocy.org>
> > CommitDate: Sat Aug 15 17:06:31 2020 +0100
> > 
> >     Allow build configuration on Apple ARM devices (bug#41994)
> >     
> > So it sounds like arm-* was in use, and it's now aarch64-*?  In which
> > case adding the latter, instead of altering it, is the right change here?
> 
> I'm unsure. I've googled a bit and found stuff saying that Apple used
> to use arm64, but now everyone uses aarch64. I don't know if the
> original patch had ever actually been tested on an ARM Mac.
> 
> If Roland Kaufmann doesn't respond with a better plan, I suppose we'd
> be safest just adding it as you suggest.

FWIW, uname -m and clang --version both report arm64 (not arm), but it seems
that config.sub normalizes this to aarach64.  See commit 5d89a9c2846d32b47.

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Itai

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