Hi Eli,

Eli Zaretskii <eliz@gnu.org> writes:
>> From: Naofumi Yasufuku <naofumi@yasufuku.dev>
>> Date: Sat, 06 Aug 2022 20:38:58 +0900
>> 
>> './configure --with-native-compilation' fails if Homebrew libgccjit is
>> updated to 12.1.0.  Attached configure.ac patch fixes this issue.
>> I think the same patch should be applied to emacs-28 branch.
>
> I don't mind installing this on master, but I'd rather document that
> Emacs 28 cannot be built on macOS with such a new libgccjit than
> destabilize the release branch, even if it's only for macOS.  E.g.,
> who says that 'readlink' will always be available on macOS?

Thank you for your indication.  readlink '-f' option is not supported
by BSD-based readlink shipped with old macOS.  Revised patch is
attached.  This patch just choose 'current/libgccjit.dylib' from
multiple libgccjit.dylib paths.

--8<---------------cut here---------------start------------->8---
$ brew ls -v libgccjit | grep -E 'libgccjit\.(so|dylib)$'
/usr/local/Cellar/libgccjit/12.1.0/lib/gcc/current/libgccjit.dylib
/usr/local/Cellar/libgccjit/12.1.0/lib/gcc/12/libgccjit.dylib
$
$ ls -lR /usr/local/Cellar/libgccjit/12.1.0/lib/gcc
total 0
drwxr-xr-x  4 naofumi  admin  128 May  6 16:53 12
drwxr-xr-x  4 naofumi  admin  128 May  6 16:53 current

/usr/local/Cellar/libgccjit/12.1.0/lib/gcc/12:
total 0
lrwxr-xr-x  1 naofumi  admin  28 May  6 16:53 libgccjit.0.dylib -> ../current/libgccjit.0.dylib
lrwxr-xr-x  1 naofumi  admin  26 May  6 16:53 libgccjit.dylib -> ../current/libgccjit.dylib

/usr/local/Cellar/libgccjit/12.1.0/lib/gcc/current:
total 82304
-rw-r--r--  1 naofumi  admin  42138352 Aug  6 18:06 libgccjit.0.dylib
lrwxr-xr-x  1 naofumi  admin        17 May  6 16:53 libgccjit.dylib -> libgccjit.0.dylib
$
--8<---------------cut here---------------end--------------->8---