Re: regex.c simplification

[Paul Eggert]

Stefan Monnier wrote:
> > If we wanted to make the fork more official, we could simplify src/regex.c
> > to not worry about lib-src, by having etags use Glibc/Gnulib regex rather
> > than Emacs regex.
> I would welcome such a change.

I started the ball rolling by writing a patch that changes etags to use Glibc 
regex, falling back on a Gnulib copy if Glibc is not available; see Bug#32194. 
We can follow up later by simplifying the Emacs-only regex code to assume Emacs.