From 3f2f6ca8916c299d0f9c3cdd4eceb95cfb5eb1e4 Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Thu, 1 Nov 2012 15:27:56 +1100
Subject: [PATCH] sock is potentially unused in use_min_mtu

---
 lib/isc/unix/socket.c  | 3 +++
 lib/isc/win32/socket.c | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/isc/unix/socket.c b/lib/isc/unix/socket.c
index 8aa9af44fe..6ef1862eb2 100644
--- a/lib/isc/unix/socket.c
+++ b/lib/isc/unix/socket.c
@@ -2227,6 +2227,9 @@ clear_bsdcompat(void) {
 
 static void
 use_min_mtu(isc__socket_t *sock) {
+#if !defined(IPV6_USE_MIN_MTU) && !defined(IPV6_MTU)
+	UNUSED(sock);
+#endif
 #ifdef IPV6_USE_MIN_MTU
 	/* use minimum MTU */
 	if (sock->pf == AF_INET6) {
diff --git a/lib/isc/win32/socket.c b/lib/isc/win32/socket.c
index 7ce2b7f3b3..1648e56b67 100644
--- a/lib/isc/win32/socket.c
+++ b/lib/isc/win32/socket.c
@@ -1427,7 +1427,7 @@ startio_send(isc_socket_t *sock, isc_socketevent_t *dev, int *nbytes,
 }
 
 static void
-use_min_mtu(isc__socket_t *sock) {
+use_min_mtu(isc_socket_t *sock) {
 #ifdef IPV6_USE_MIN_MTU
 	/* use minimum MTU */
 	if (sock->pf == AF_INET6) {
@@ -1435,6 +1435,8 @@ use_min_mtu(isc__socket_t *sock) {
 		(void)setsockopt(sock->fd, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
 				(void *)&on, sizeof(on));
 	}
+#else
+	UNUSED(sock);
 #endif
 }