Re: master d8da850: Document cairo-related fallout to font-backend settings

[Eli Zaretskii]

> From: Robert Pluim <address@hidden>
> Date: Tue, 21 Jan 2020 08:44:39 +0100
> Cc: Emacs developers <address@hidden>
> 
> I see two options:
> 
> 1. give the Qftcrhb symbol the same name as Qftcr, which might do the
> right thing, but would make it harder to work out whether HarfBuzz is
> actually being used.
> 
> 2. just say "If youʼre going to be modern, be modern: Cairo requires
> HarfBuzz" (note that this is the path that Pango is taking).

I think 2 is the best alternative right now.  I don't think we should
make more radical decisions based on such incomplete experience, both
with the Cairo build and with HarfBuzz.