bug#51102: [PATCH] Make speedbar XEmacs compatibility mode obsolete (etags)

[Eli Zaretskii]

> From: Stefan Kangas <stefan@marxist.se>
> Date: Mon, 11 Oct 2021 07:18:24 -0700
> Cc: Eric Ludlam <ericludlam@gmail.com>, zappo@gnu.org, 51102@debbugs.gnu.org
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > OK, thanks.  So I think we should leave the etags support as an
> > optional feature, but remove the reference to XEmacs from the doc
> > string of the defcustom.
> 
> I think we should also document under which circumstances one would want
> to use etags instead of imenu.
> 
> For example, someone could check which languages have support in etags
> but not in imenu and list them.

Sure, if we know that, or can find out, that'd be useful information.
The languages supported by etags can be seen in "etags --help".