From e7662c4c6347648e95606338ce98f360e5afb5a7 Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Thu, 9 Jul 2020 15:04:31 +1000
Subject: [PATCH] Mark 'addr' as unused if HAVE_IF_NAMETOINDEX is not defined

Also 'zone' should be initialised to zero.
---
 lib/isc/netscope.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/isc/netscope.c b/lib/isc/netscope.c
index bca2d13801..68a0a8dc14 100644
--- a/lib/isc/netscope.c
+++ b/lib/isc/netscope.c
@@ -18,6 +18,7 @@
 #include <isc/netscope.h>
 #include <isc/result.h>
 #include <isc/string.h>
+#include <isc/util.h>
 
 isc_result_t
 isc_netscope_pton(int af, char *scopename, void *addr, uint32_t *zoneid) {
@@ -26,9 +27,13 @@ isc_netscope_pton(int af, char *scopename, void *addr, uint32_t *zoneid) {
 	unsigned int ifid;
 	struct in6_addr *in6;
 #endif /* ifdef HAVE_IF_NAMETOINDEX */
-	uint32_t zone;
+	uint32_t zone = 0;
 	uint64_t llz;
 
+#ifndef HAVE_IF_NAMETOINDEX
+	UNUSED(addr);
+#endif
+
 	/* at this moment, we only support AF_INET6 */
 	if (af != AF_INET6) {
 		return (ISC_R_FAILURE);