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

[Robert Pluim]

>>>>> On Tue, 21 Jan 2020 17:32:23 +0200, Eli Zaretskii <address@hidden> said:

    >> 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).

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

So a configure.ac patch that says 'if cairo && ! harfbuzz error_out'
is pre-approved? Or did you have something else in mind?

Robert