Re: master 2c79a8f 2/2: Use posix_spawn if possible.

[Saulius Menkevicius]

Hello Robert, Eli,

I can confirm that this patch is needed for emacs-28 too, as currently emacs on 
macOS blocks SIGCHLD the same way as it does on Linux.

Applying Robert’s patch on emacs-28 fixes the issue on macOS.

Tested on macOS 12.2 / aarch64.

-Saulius

> Am 2022-02-02 um 10:54 schrieb Saulius Menkevičius 
> <sauliusmenkevicius@fastmail.com>:
> 
> I’ve just received a new Mac (arm64/M1) for myself so I can test if 28 has it 
> broken on macOS too.
> 
> —Saulius Menkevičius
> 
>> Am 2022-02-02 um 10:30 schrieb Robert Pluim <rpluim@gmail.com>:
>> 
>> 
>>> 
>>>>>>> On Tue, 01 Feb 2022 21:52:18 +0200, Eli Zaretskii <eliz@gnu.org> said:
>> 
>>>> From: Robert Pluim <rpluim@gmail.com>
>>>> Cc: Eli Zaretskii <eliz@gnu.org>,  Matt Armstrong <matt@rfc20.org>,
>>>> p.stephani2@gmail.com,  alan@idiocy.org,  mituharu@math.s.chiba-u.ac.jp,
>>>> emacs-devel@gnu.org
>>>> Date: Tue, 01 Feb 2022 20:23:23 +0100
>>>> 
>>>>>>>>> On Tue, 1 Feb 2022 20:30:18 +0200, Saulius Menkevicius 
>>>>>>>>> <sauliusmenkevicius@fastmail.com> said:
>>>> 
>>   Saulius> Thanks Robert!
>>   Saulius> I applied your patch and that has actually has fixed the issue. 
>> So I
>>   Saulius> suggest this patch be applied on master.
>>>> 
>>>> I can do that, if Eli/Lars agree.
>> 
>>   Eli> Are there any downsides to the patch?  If not, I see no reasons not to
>>   Eli> install that.
>> 
>> Not as far as I can tell, but I shall test on a few more platforms
>> before pushing.
>> 
>>>> What should we do for emacs-28?
>> 
>>   Eli> Nothing, because on emacs-28 we use posix_spawn only on macOS.
>> 
>> Right, Iʼd missed that, master it is then. We could put it in 28.2, I
>> guess, but I hadn't noticed any issues with subprocesses on emacs-28
>> on macOS.
>> 
>> Robert
>> --