Re: [PATCH] Interferences between xwidgets and async processes?

[Akira Kyle]

On Sat, Nov 14, 2020 at 09:22 AM, Eli Zaretskii <eliz@gnu.org> 
wrote:

> > > The attached patch fixes this but only in a temporary way.
> >
> > Thanks; applied to Emacs 28.
>
> Just to be sure: the fix that is now installed on master does 
> support
> current and old versions of Glib, where the old code seemed to 
> work?
> Or does it break with older Glib versions?

I didn't explicitly try it with glib versions before they changed 
the signal handling in commit 2e471acf, but it *should* work with 
versions before the change. As you can see in the patch, it 
essentially just makes Emacs more aggressive in taking over the 
signal handler and in glib versions before 2e471acf, 
g_source_unref (source) wouldn't result in glib resetting the 
signal handler to SIG_DFL, in which case Emacs will just install 
itself twice to handle SIGCHLD which is fine.

I think commit 2e471acf got added to glib with version 2.37.5 
which was released over 7 years ago.