FcConfigEnableHome - controls use of the home directory.
#include <fontconfig/fontconfig.h>
FcBool FcConfigEnableHome (FcBool enable);
If enable is FcTrue, then Fontconfig will use various files which are
specified relative to the user's home directory (using the ~ notation in the
configuration). When enable is FcFalse, then all use of the home
directory in these contexts will be disabled. The previous setting of the
value is returned.