Provided by: libfontconfig-doc_2.13.1-4.4ubuntu1_all 
NAME
FcDirCacheValid - check directory cache
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcDirCacheValid (const FcChar8 *dir);
DESCRIPTION
Returns FcTrue if dir has an associated valid cache file, else returns FcFalse