bug#44528: New bidi problems with outline-mode (Arabic, Hebrew,..)

[Eli Zaretskii]

> Cc: 44528@debbugs.gnu.org
> From: Fr Ml <fr_ml@t-online.de>
> Date: Thu, 12 Nov 2020 08:14:30 +0100
> 
> in the INSTALL instruction of Emacs we read:
> (On GNU and Unix systems, Emacs needs the optional libraries "m17n-db",
> "libm17n-flt", "libotf" to correctly display such complex scripts as
> Indic and Khmer, and also for scripts that require Arabic shaping
> support (Arabic and Farsi).)
> 
> But I noticed that libm17n-flt isn't installed and it's not a package in the 
> repository of Archlinux . I didn't need
> to install it before.
> 
> Can it be the problem? Or is it included in the other packages (m17n-db, 
> libotf)?

This text is outdated: we nowadays prefer HarfBuzz, if available, as
our shaping engine.  Is your build using HarfBuzz?  You can tell by
looking at the value of the variable 'system-configuration-features'.

If your build doesn't use HarfBuzz, I suggest to install one that
does.