FcCharSetDelChar − Add a character to a charset
#include <fontconfig/fontconfig.h>
FcBool FcCharSetDelChar (FcCharSet *fcs, FcChar32 ucs4);
FcCharSetDelChar deletes a single Unicode char from the set, returning FcFalse on failure, either as a result of a constant set or from running out of memory.
Fontconfig version 2.10.95