Provided by: libfontconfig1-dev_2.12.6-0ubuntu2_amd64 

NAME
FcCharSetEqual - Compare two charsets
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcCharSetEqual (const FcCharSet *a, const FcCharSet *b);
DESCRIPTION
Returns whether a and b contain the same set of Unicode chars.
Fontconfig 2.12.6 05 April 2018 FcCharSetEqual(3)