GNU bug report logs - #47307
Emacs 27.2 RC2 build/check issues on macOS ARM64

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: 47307 <at> debbugs.gnu.org
Subject: bug#47307: Emacs 27.2 RC2 build/check issues on macOS ARM64
Date: Sun, 21 Mar 2021 18:27:32 -0700

[Message part 1 (text/plain, inline)]

I configured Emacs 27.2 RC2 on macOS 11.2 ARM64 (arm-apple-darwin20.3.0) 
using "./configure --with-gnutls=ifavailable" (plain "./configure" 
failed, which was disconcerting). When I ran "make" the compiler complained:

editfns.c:2063:18: warning: unsequenced modification and access to 
'sa_avail' [-Wunsequenced]

This correctly diagnoses undefined behavior in that C function. I didn't 
investigate what happens on that platform is as it's easier to fix the 
problem on all platforms. I propose installing the attached 
obviously-safe patch into the emacs-27 branch.

There were several deprecation warnings when compiling but I assume we 
don't care about them in this older branch.

"make check" reported four unexpected failures. Perhaps a macOS expert 
could be persuaded to look into them. A tarball of the failed logs is 
attached.

[0001-Fix-replace-buffer-contents-undefined-behavior.patch (text/x-patch, attachment)]

[emacs-27.2-RC2-failures-macOS11.2-ARM.tar.gz (application/gzip, attachment)]

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