On 11/2/22 08:09, Eli Zaretskii wrote:
>> Why canʼt we just call `child_signal_init' from `init_process_emacs'
>> instead of `create_process'?
> Maybe we could.  Assuming the signal stuff is already set so early, I
> don't know exactly how posix_spawn works.

child_signal_init is reasonably heavyweight in that it keeps a couple of 
file descriptors open, so the idea is to be lazy and not call it unless 
Emacs plans to have children.

I installed the attached, which is like Robert's patch except it keeps 
the critical section smaller and checks the declaration of the 
now-extern function. Please give it a try. I'll boldly close the bug 
report; we can reopen it if I'm wrong.