Remove compiler warnings for obscure combinations of build options.

src/dnsmasq.c

@@ -64,14 +64,16 @@ int main (int argc, char **argv)
   int need_cap_net_raw = 0;
   int need_cap_net_bind_service = 0;
   int have_cap_chown = 0;
+#  ifdef HAVE_DHCP
   char *bound_device = NULL;
   int did_bind = 0;
+#  endif
   struct server *serv;
   char *netlink_warn;
 #else
   int bind_fallback = 0;
 #endif 
-#if defined(HAVE_DHCP) || defined(HAVE_DHCP6)
+#if defined(HAVE_DHCP)
   struct dhcp_context *context;
   struct dhcp_relay *relay;
 #endif
@@ -79,6 +81,8 @@ int main (int argc, char **argv)
   int tftp_prefix_missing = 0;
 #endif
 
+  (void)netlink_warn;
+  
 #if defined(HAVE_IDN) || defined(HAVE_LIBIDN2) || defined(LOCALEDIR)
   setlocale(LC_ALL, "");
 #endif

src/inotify.c

@@ -251,6 +251,8 @@ int inotify_check(time_t now)
   int hit = 0;
   struct dyndir *dd;
 
+  (void)now;
+  
   while (1)
     {
       int rc;

src/network.c

@@ -1569,6 +1569,8 @@ void check_servers(int no_loop_check)
   int port = 0, count;
   int locals = 0;
 
+  (void)no_loop_check;
+  
 #ifdef HAVE_LOOP
   if (!no_loop_check)
     loop_send_probes();
@@ -1775,7 +1777,9 @@ int reload_servers(char *fname)
 /* Called when addresses are added or deleted from an interface */
 void newaddress(time_t now)
 {
+#ifdef HAVE_DHCP
   struct dhcp_relay *relay;
+#endif
   
   (void)now;
   

src/ubus.c

@@ -214,6 +214,11 @@ static int ubus_handle_set_connmark_allowlist(struct ubus_context *ctx, struct u
   struct blob_attr *tb[policy_len];
   struct blob_attr *attr;
 
+  (void)ctx;
+  (void)obj;
+  (void)req;
+  (void)method;
+  
   if (blobmsg_parse(policy, policy_len, tb, blob_data(msg), blob_len(msg)))
     return UBUS_STATUS_INVALID_ARGUMENT;