Man page - fcstrbuildfilename(3)
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Manual
FcStrBuildFilename
NAMESYNOPSIS
DESCRIPTION
NAME
FcStrBuildFilename - Concatenate strings as a file path
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcChar8 * FcStrBuildFilename (const FcChar8 * path , ...);
DESCRIPTION
Creates a filename from the given elements of strings as file paths and concatenate them with the appropriate file separator. Arguments must be null-terminated. This returns a newly-allocated memory which should be freed when no longer needed.