Exclude test and a supporting function when evdns_base_get_nameserver_addr() is not available

src/feature/relay/dns.c

@@ -1366,6 +1366,7 @@ number_of_configured_nameservers(void)
   return evdns_base_count_nameservers(the_evdns_base);
 }
 
+#ifdef HAVE_EVDNS_BASE_GET_NAMESERVER_ADDR
 /**
  * Return address of configured nameserver in <b>the_evdns_base</b>
  * at index <b>idx</b>.
@@ -1386,6 +1387,7 @@ configured_nameserver_address(const size_t idx)
 
  return NULL;
 }
+#endif
 
 /** Configure eventdns nameservers if force is true, or if the configuration
  * has changed since the last time we called this function, or if we failed on

src/feature/relay/dns.h

@@ -46,7 +46,9 @@ size_t dns_cache_handle_oom(time_t now, size_t min_remove_bytes);
 #include "feature/relay/dns_structs.h"
 
 size_t number_of_configured_nameservers(void);
+#ifdef HAVE_EVDNS_BASE_GET_NAMESERVER_ADDR
 tor_addr_t *configured_nameserver_address(const size_t idx);
+#endif
 
 MOCK_DECL(STATIC int,dns_resolve_impl,(edge_connection_t *exitconn,
 int is_resolve,or_circuit_t *oncirc, char **hostname_out,

src/test/test_dns.c

@@ -1,6 +1,7 @@
 /* Copyright (c) 2015-2018, The Tor Project, Inc. */
 /* See LICENSE for licensing information */
 
+#include "orconfig.h"
 #include "core/or/or.h"
 #include "test/test.h"
 
@@ -21,6 +22,7 @@
 
 #define NS_MODULE dns
 
+#ifdef HAVE_EVDNS_BASE_GET_NAMESERVER_ADDR
 #define NS_SUBMODULE configure_nameservers_fallback
 
 static or_options_t options = {
@@ -75,6 +77,7 @@ NS(test_main)(void *arg)
 }
 
 #undef NS_SUBMODULE
+#endif
 
 #define NS_SUBMODULE clip_ttl
 
@@ -796,7 +799,9 @@ NS(test_main)(void *arg)
 #undef NS_SUBMODULE
 
 struct testcase_t dns_tests[] = {
+#ifdef HAVE_EVDNS_BASE_GET_NAMESERVER_ADDR
    TEST_CASE(configure_nameservers_fallback),
+#endif
    TEST_CASE(clip_ttl),
    TEST_CASE(resolve),
    TEST_CASE_ASPECT(resolve_impl, addr_is_ip_no_need_to_resolve),