Provided by: libfontconfig1-dev_2.12.6-0ubuntu2_amd64 

NAME
FcStrSetAddFilename - add a filename to a string set
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcStrSetAddFilename (FcStrSet *set, const FcChar8 *s);
DESCRIPTION
Adds a copy s to set, The copy is created with FcStrCopyFilename so that leading '~' values are replaced
with the value of the HOME environment variable.
Fontconfig 2.12.6 05 April 2018 FcStrSetAddFilename(3)