+#if HAVE_STRTOULL
+# define STRTOULL strtoull
+#elif HAVE___STRTOULL
+/* HP-UX 11 has __strtoull in <inttypes.h> */
+# define STRTOULL __strtoull
+#else
+/*
+ * Just fall back to strtoul -- in the worst case we just lose the ability
+ * to set all 64 bits of the seed.
+ */
+# define STRTOULL strtoul
+#endif
+