FcConfigUptoDate (3) - Linux Manuals
FcConfigUptoDate: Check timestamps on config files
NAME
FcConfigUptoDate - Check timestamps on config files
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcBool FcConfigUptoDate (FcConfig *config);
DESCRIPTION
Checks all of the files related to config and returns whether any of them has been modified since the configuration was created. If config is NULL, the current configuration is used.