Re: Emacs 27.1 Windows Binaries -- testing wanted

[Robert Pluim]

>>>>> On Fri, 21 Aug 2020 22:44:18 +0300, Eli Zaretskii <eliz@gnu.org> said:
    >> Obviously more features to go. I haven't worked out how to test the 
    >> existence of harfbuzz yet.

    Eli>   (car (frame-parameter nil 'font-backend))

There are vendor-provided versions of Emacs that mess with
font-backend and/or FontBackend, and the user may have changed it
themselves, so thatʼs not going to work. Perhaps we need a
`harfbuzz-available-p` defun?

Robert