Re: How to enforce unicode font for all charsets?

[Eli Zaretskii]

> From: Sergey Organov <sorganov@gmail.com>
> Cc: help-gnu-emacs@gnu.org
> Date: Fri, 13 Mar 2020 17:54:51 +0300
> 
> > Is the snapshot you installed using the HarfBuzz library?  (If it
> > does, you should see it in the output of "C-u C-x =".)  If it doesn't,
> > please try a build that does use HarfBuzz, which is now the default
> > font backend in Emacs, before you decide that the issue still exists
> > in the latest codebase.
> 
> I didn't built it myself and have no idea what HarfBuzz is, here is the
> output of "C-u C-x =":
> 
> --- >8 ---
>              position: 24 of 60 (38%), column: 23
>             character: п (displayed as п) (codepoint 1087, #o2077, #x43f)
>               charset: windows-1251 (WINDOWS-1251 (Cyrillic))
> code point in charset: 0xEF
>                script: cyrillic
>                syntax: w      which means: word
>              category: .:Base, L:Left-to-right (strong), Y:2-byte Cyrillic, 
> c:Chinese, h:Korean, j:Japanese, y:Cyrillic
>              to input: type "C-x 8 RET 43f" or "C-x 8 RET CYRILLIC SMALL 
> LETTER PE"
>           buffer code: #xD0 #xBF
>             file code: #xD0 #xBF (encoded by coding system utf-8-unix)
>               display: by this font (glyph code)
>     x:-xos4-terminus-medium-r-normal--16-160-72-72-c-80-microsoft-cp1251 
> (#xEF)

The output for the other string, the one with the 'unicode' charset,
is the telltale sign.  It shouldn't show "xft" before the font name.

Also, system-configuration-features should include "HARFBUZZ" if Emacs
was built with HarfBuzz.