Description: fix FTBFS with gcc 14 using -Wimplicit-function-declaration
Author: Renzo Davoli

diff -Naur lwipv6-1.5a.orig/lwip-contrib/ports/unix/netif/vdeif.c lwipv6-1.5a/lwip-contrib/ports/unix/netif/vdeif.c
--- lwipv6-1.5a.orig/lwip-contrib/ports/unix/netif/vdeif.c	2011-12-13 10:25:28.000000000 +0100
+++ lwipv6-1.5a/lwip-contrib/ports/unix/netif/vdeif.c	2024-07-28 13:21:07.005569410 +0200
@@ -482,7 +482,7 @@
 	p = low_level_stream_input(vdeif, netif->flags, buf, count);
 	if (p == NULL) {
 		LWIP_DEBUGF(VDEIF_DEBUG, ("vdeif_input: low_level_input returned NULL\n"));
-		return;
+		return 0;
 	}
 
 	vde_dispatch_input(netif, p);
diff -Naur lwipv6-1.5a.orig/lwip-v6/src/api/sockets.c lwipv6-1.5a/lwip-v6/src/api/sockets.c
--- lwipv6-1.5a.orig/lwip-v6/src/api/sockets.c	2024-07-28 13:20:03.000000000 +0200
+++ lwipv6-1.5a/lwip-v6/src/api/sockets.c	2024-07-28 13:21:07.005569410 +0200
@@ -75,6 +75,7 @@
 #include "lwip/sockets.h"
 
 #include "lwip/tcpip.h"
+#include "netif/etharp.h"
 
 #if LWIP_NL
 #include "lwip/netlink.h"
diff -Naur lwipv6-1.5a.orig/lwip-v6/src/api/tcpip.c lwipv6-1.5a/lwip-v6/src/api/tcpip.c
--- lwipv6-1.5a.orig/lwip-v6/src/api/tcpip.c	2011-12-13 10:25:28.000000000 +0100
+++ lwipv6-1.5a/lwip-v6/src/api/tcpip.c	2024-07-28 13:21:07.005569410 +0200
@@ -63,8 +63,11 @@
 #include "lwip/udp.h"
 #include "lwip/tcp.h"
 
+#include "lwip/api_msg.h"
 #include "lwip/tcpip.h"
 
+void tcp_shutdown(struct stack *stack);
+
 /*---------------------------------------------------------------------------*/
 
 /*
diff -Naur lwipv6-1.5a.orig/lwip-v6/src/core/netif.c lwipv6-1.5a/lwip-v6/src/core/netif.c
--- lwipv6-1.5a.orig/lwip-v6/src/core/netif.c	2011-12-13 10:25:28.000000000 +0100
+++ lwipv6-1.5a/lwip-v6/src/core/netif.c	2024-07-28 13:21:07.005569410 +0200
@@ -1,3 +1,4 @@
+#include <unistd.h>
 /**
  * @file
  *
diff -Naur lwipv6-1.5a.orig/lwip-v6/src/core/tcp.c lwipv6-1.5a/lwip-v6/src/core/tcp.c
--- lwipv6-1.5a.orig/lwip-v6/src/core/tcp.c	2011-12-13 10:25:28.000000000 +0100
+++ lwipv6-1.5a/lwip-v6/src/core/tcp.c	2024-07-28 13:21:07.005569410 +0200
@@ -75,6 +75,9 @@
 #include "lwip/memp.h"
 
 #include "lwip/tcp.h"
+
+void slirp_tcp_close(struct tcp_pcb *pcb);
+
 #if LWIP_TCP
 
 const u8_t tcp_backoff[13] =