-/* Declare public functions */
-struct TM *gmtime64_r (const Time64_T *, struct TM *);
-struct TM *localtime64_r (const Time64_T *, struct TM *);
-Time64_T timegm64 (struct TM *);
+/* Declare functions */
+static struct TM *S_gmtime64_r (const Time64_T *, struct TM *);
+static struct TM *S_localtime64_r (const Time64_T *, struct TM *);
+static Time64_T S_timegm64 (struct TM *);