Provided by: libfontconfig1-dev_2.12.6-0ubuntu2_amd64 

NAME
FcDirCacheClean - This tries to clean up the cache directory of cache_dir.This returns FcTrue if the
operation is successfully complete. otherwise FcFalse.
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcDirCacheClean (const FcChar8 *cache_dir, FcBoolverbose);
DESCRIPTION
SINCE
version 2.9.91
Fontconfig 2.12.6 05 April 2018 FcDirCacheClean(3)