* isn't available or did not define it, just go with hard-coded.
*/
# ifndef PRIu64
-# define PRIu64 "lu"
+# ifdef SIXTY_FOUR_BIT_LONG
+# define PRIu64 "lu"
+# else
+# define PRIu64 "llu"
+# endif
# endif
/* ossl_inline: portable inline definition usable in public headers */