+/* This is the default address we connect to for very old libraries
+ * which didn't specify the address and port number explicitly on the
+ * kernel command line. It's now recommended to always specify the
+ * address and port number on the command line, so this will not be
+ * used any more.
+ */
+#define OLD_GUESTFWD_ADDR "10.0.2.4"
+#define OLD_GUESTFWD_PORT "6666"
+
+/* This is only a hint. If not defined, ignore it. */
+#ifndef AI_ADDRCONFIG
+# define AI_ADDRCONFIG 0
+#endif
+
+#ifndef MAX
+# define MAX(a,b) ((a)>(b)?(a):(b))
+#endif
+
+/* If root device is an ext2 filesystem, this is the major and minor.
+ * This is so we can ignore this device from the point of view of the
+ * user, eg. in guestfs_list_devices and many other places.
+ */
+static dev_t root_device = 0;