Re: bad default font on Windows mingw64

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 23 Jul 2019 05:37:17 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: emacs-devel@gnu.org
> 
> > From: Stephen Leake <stephen_leake@stephe-leake.org>
> > Date: Mon, 22 Jul 2019 18:03:29 -0700
> > 
> > > pacman -Qi mingw-w64-x86_64-harfbuzz
> > 
> > I had to do 'pacman -S --refresh' first, but now that's updated.
> > 
> > Emacs 'make' did not notice the change, so I had to to 'make clean' first
> > 
> > And now it works properly, so the problem was an old harbuzz library.
> > 
> > Perhaps configure should check for that?
> 
> I wouldn't know what check to insert.  hb_font_get_nominal_glyph
> appeared in HarfBuzz 1.2.3, and we already check for that.  I suspect
> your problem was actually with Freetype, which is HarfBuzz's
> dependency.

I asked on the HarfBuzz mailing list, and it turned out that our code
implicitly assumed HarfBuzz 2.0.0 or later, by omitting a function
call which was needed before that version.  I've now added that call,
so we can indeed support old HarfBuzz versions on MS-Windows, per the
configure-time tests.

Thanks.