bug#44020: 28.0.50; Prefer selection of colour emoji fonts?

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: 44020@debbugs.gnu.org,  larsi@gnus.org
> Date: Mon, 19 Oct 2020 20:34:41 +0200
> 
> (set-fontset-font t 'emoji '("Apple Color Emoji . "iso1064601") nil
> 'prepend)
> 
> It *should* work as-is on GNU/Linux, but for some reason Emacs is
> completely refusing to use any Emoji fonts for me there. Itʼs possible
> Iʼve messed up my system somehow, since emacs-27 has the same issue,
> but Iʼm seeing some very suspicious results from
> ftcrfont_glyph_extents (the font average width is always 0), so perhaps
> we need to adjust our font code.

Didn't someone say they can see color emoji on Cairo?