Provided by: libfontconfig1-dev_2.12.6-0ubuntu2_amd64 

NAME
FcCharSetAddChar - Add a character to a charset
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcCharSetAddChar (FcCharSet *fcs, FcChar32 ucs4);
DESCRIPTION
FcCharSetAddChar adds a single Unicode char to the set, returning FcFalse on failure, either as a result
of a constant set or from running out of memory.
Fontconfig 2.12.6 05 April 2018 FcCharSetAddChar(3)