1 files changed, 22 insertions, 0 deletions
diff --git a/deps/uv/test/task.h b/deps/uv/test/task.h
index e890c77fe1..07584c5299 100644
--- a/deps/uv/test/task.h
+++ b/deps/uv/test/task.h
@@ -39,6 +39,11 @@
 # include <sys/resource.h>  /* setrlimit() */
 #endif
 
+#ifdef __clang__
+# pragma clang diagnostic ignored "-Wvariadic-macros"
+# pragma clang diagnostic ignored "-Wc99-extensions"
+#endif
+
 #define TEST_PORT 9123
 #define TEST_PORT_2 9124
 
@@ -229,4 +234,21 @@ UNUSED static void close_loop(uv_loop_t* loop) {
   uv_run(loop, UV_RUN_DEFAULT);
 }
 
+UNUSED static int can_ipv6(void) {
+  uv_interface_address_t* addr;
+  int supported;
+  int count;
+  int i;
+
+  if (uv_interface_addresses(&addr, &count))
+    return 1;  /* Assume IPv6 support on failure. */
+
+  supported = 0;
+  for (i = 0; supported == 0 && i < count; i += 1)
+    supported = (AF_INET6 == addr[i].address.address6.sin6_family);
+
+  uv_free_interface_addresses(addr, count);
+  return supported;
+}
+
 #endif /* TASK_H_ */