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From: Simon Wright <simon@pushface.org>
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Subject: Re: GNAT linking and macOS
Date: Thu, 28 Sep 2023 14:32:47 +0100
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moi <findlaybill@blueyonder.co.uk> writes:

> I installed 14.0, Sonoma, on my M1 Mac last night.
>
> The good news:
>
> Using GNAT 12.2.0, it all just works, *so long as* I REMOVE
> '-largs -Wl,-ld_classic' from the linker options!

Likewise, but that didn't work for me.

It turns out there's an environment variable DEFAULT_LINKER, which with
the 15.0 CLT would be set to

  export DEFAULT_LINKER=/Library/Developer/CommandLineTools/usr/bin/ld-classic

(the Xcode equivalent is much longer & more inscrutable)

I haven't tried this.