This is a request for an enhacement as a result of a discussion on issues with fontconfig where the wrong font was selected for some bad glyphs in fonts. In general it is difficult to request a font designer to remove certain glyphs from the font. If the font is listed higher in the preference list in fonts.conf, it will mask any quality glyphs in other fonts. This problem arises often with "universal" unicode fonts that provide unoptimised glyphs. Therefore, we are looking into a functionality that can be configured from fonts.conf and would allow to hide/disable certain glyphs or range of glyphs for specific fonts.
Fontconfig already has the notion of languages and that already allows for fine-grained per-language configuration. Follow this thread for examples of how to do that: http://mail.gnome.org/archives/gtk-i18n-list/2006-March/msg00037.html This is a WONTFIX IMHO.
Marking WONTFIX.
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