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Describe how to debug fontconfig issues

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* etc/PROBLEMS: Add FC_DEBUG usage pointers.
This commit is contained in:
Robert Pluim 2021-10-20 18:22:40 +02:00
parent c916040921
commit 2d647e88fa
1 changed files with 12 additions and 0 deletions
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12
etc/PROBLEMS
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@ -751,6 +751,18 @@ Try removing or moving aside "$XDG_CONFIG_HOME/fontconfig/conf.d" and
"$XDG_CONFIG_HOME/fontconfig/fonts.conf"
($XDG_CONFIG_HOME is treated as "~/.config" if not set)
Running Emacs as
FC_DEBUG=1024 emacs
will cause fontconfig to output information about which configuration
files it is reading. Running Emacs as
FC_DEBUG=1 emacs
will result in information about the results of fontconfig's font
matching (including the filename(s) of the resulting fonts).
*** This can occur when two different versions of FontConfig are used.
For example, XFree86 4.3.0 has one version and Gnome usually comes
with a newer version. Emacs compiled with Gtk+ will then use the