bug#43148: 27.1; Widget text seems to disappear when building with Cairo and Xaw

[YAMAMOTO Mitsuharu]

On Wed, 25 Nov 2020 11:30:07 +0900,
Basil L. Contovounesios wrote:
> 
> Robert Pluim <rpluim@gmail.com> writes:
> 
> >>>>>> On Tue, 01 Sep 2020 17:09:18 +0300, Eli Zaretskii <eliz@gnu.org> said:
> >
> >     >> From: Pouar Dragon <pouar@pouar.net>
> >     >> Date: Mon, 31 Aug 2020 21:34:46 -0500
> >     >> 
> >     >> widgets when building with Xaw and Cairo seem to have missing text,
> >     >> looking like this
> >     >> 
> >     >> problem seems to go away when 
> > 5f4e8e2e088de9fb76cb631077c6eddd3219f594
> >     >> is reverted
> >
> >     Eli> Thanks.  I hope Yamamoto-san will be able to take a look at this.
> >
> > Putting on my 'let's simplify' hat, is this really a combination we
> > want to spend time on? Lucid + Xaw + Cairo is decidedly non-mainstream
> > (Iʼm surprised it even builds).
> 
> FWIW, I've been happily using Lucid + Xaw3D for several years, and Cairo
> ever since it became stable in Emacs 27 and the default configuration in
> Emacs 28.
> 
> I usually have menu-bar-mode off, but like other reports in this thread,
> the menus look fine when I do open them, e.g. after 'emacs -Q'.
> 
> Could the issue depend on e.g. the version of Cairo?  (I seem to have an
> older version than the OP.)

Possibly.  The OP seems to use cairo 1.17.3, which is not a release
version (the latest is 1.16.0) and even not the snapshot one (the
latest is 1.17.2 according to https://cairographics.org).

                                     YAMAMOTO Mitsuharu
                                mituharu@math.s.chiba-u.ac.jp