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

[Robert Pluim]

tastytea via "Bug reports for GNU Emacs, the Swiss army knife of text
editors" <bug-gnu-emacs@gnu.org> writes:

> With the patch I get rectangles instead of letters.
>
> I removed Noto Color Emoji from my font configuration in
> ~/.config/fontconfig/fonts.conf and that did the trick. The menus are
> showing text now with and without the patch. But I have no idea why,
> all other programs work fine with that configuration:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
> <fontconfig>
>   <!-- Prefer Noto's Color Emoji Font -->
>   <alias>
>     <family>serif</family>
>     <prefer>
>       <family>Noto Color Emoji</family>
>     </prefer>
>   </alias>

If youʼre trying to say "I want to use Noto Color Emoji for emojis",
then I think you should write

<family>emoji</family>

not "serif" and "sans-serif", as Noto Color Emoji doesnʼt cover the
usual codepoints that are used for text.

Robert