FcCharSetSubtract - Subtract charsets
#include <fontconfig.h>
FcCharSet * FcCharSetSubtract(const FcCharSet *a);
(const FcCharSet *b);
.fi
Returns a set including only those chars found in a but not b.
Fontconfig version 2.8.0
18 November 2009 FcCharSetSubtract(3)