Re: bug#54667: 29.0.50; posix_spawn breaks emacs-gdb

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: emacs-devel@gnu.org
> Date: Wed, 06 Apr 2022 14:04:39 +0200
> 
> >>>>> On Wed, 06 Apr 2022 14:09:04 +0300, Eli Zaretskii <eliz@gnu.org> said:
> 
>     >> From: Robert Pluim <rpluim@gmail.com>
>     >> Date: Wed, 06 Apr 2022 11:02:12 +0200
>     >> 
>     >> >>>>> On Mon, 04 Apr 2022 16:11:51 +0200, Robert Pluim 
> <rpluim@gmail.com> said:
>     Robert> In emacs-28 we only use posix_spawn on macOS because its vork is
>     Robert> sub-optimal. I donʼt remember the rationale for switching to 
> using it
>     Robert> everywhere, itʼs undoubtedly in the archives somewhere.
>     >> 
>     Robert> Closing.
>     Robert> Committed as 8103b060d8
>     >> 
>     >> Actually, do we want this in emacs-28 as well?
> 
>     Eli> The fix installed on master isn't macOS-specific, AFAICT.  Can it be
>     Eli> reasonably installed on emacs-28 as macOS-specific?  If yes, I think
>     Eli> we should indeed backport it.
> 
> USABLE_POSIX_SPAWN is 0 on emacs-28 for every platform except macOS,
> so applying the same patch as on master is all thatʼs needed.

I didn't see USABLE_POSIX_SPAWN in the patch.  Maybe I was looking at
the wrong patch.  Can you show it?