Fixed bug #50816 (netif_add() prototype depends on configuration) by adding a new function netif_add_noaddrthat doesn't change

src/core/netif.c

@@ -218,6 +218,22 @@ netif_input(struct pbuf *p, struct netif *inp)
   return ip_input(p, inp);
 }
 
+/**
+ * @ingroup netif
+ * Add a network interface to the list of lwIP netifs.
+ *
+ * Same as @ref netif_add but without IPv4 addresses
+ */
+struct netif *
+netif_add_noaddr(struct netif *netif, void *state, netif_init_fn init, netif_input_fn input)
+{
+  return netif_add(netif,
+#if LWIP_IPV4
+    NULL, NULL, NULL,
+#endif /* LWIP_IPV4*/
+    state, init, input);
+}
+
 /**
  * @ingroup netif
  * Add a network interface to the list of lwIP netifs.