bug#68842: 29.2; implicit declaration of function 'XOpenDisplay'

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: Ulrich Müller <ulm@gentoo.org>,  68842@debbugs.gnu.org
> Date: Thu, 01 Feb 2024 09:56:59 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Po Lu, any comments to the patch?
> >
> > I don't mind installing this on emacs-29, if it's TRT, but the chances
> > for us to have another Emacs 29.x release are slim at best at this
> > point.  So I wonder whether you should bother.
> 
> I suggest cherry-picking 6c1413d5ef0d1fea639b0d8c83a0c0065d99359b
> instead, because the systems where this flag is required have lapsed out
> of existence.  It can't hurt.

That's not something we do on release branches -- they aren't supposed
to remove platforms or configurations.

So I'd prefer not to do that.  Is the original patch suggested by
Ulrich problematic in some way?  I understand that removing the text
is easier, but assuming we don't want to drop support for GCC 4.6 on
the release branch, do you see any problem in installing the patch
Ulrich posted?