Provided by: libfontconfig1-dev_2.12.6-0ubuntu2_amd64 bug

NAME
       FcCharSetUnion - Add charsets


SYNOPSIS
       #include <fontconfig/fontconfig.h>

       FcCharSet * FcCharSetUnion (const FcCharSet *a, const FcCharSet *b);


DESCRIPTION
       Returns a set including only those chars found in either a or b.

Fontconfig 2.12.6                                 05 April 2018                                FcCharSetUnion(3)