1 files changed, 22 insertions, 0 deletions
diff --git a/src/net/cgo_linux.go b/src/net/cgo_linux.go
new file mode 100644
index 000000000..4ef2d0cd1
--- /dev/null
+++ b/src/net/cgo_linux.go
@@ -0,0 +1,22 @@
+// Copyright 2011 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !android,cgo,!netgo
+
+package net
+
+/*
+#include <netdb.h>
+*/
+import "C"
+
+func cgoAddrInfoFlags() C.int {
+	// NOTE(rsc): In theory there are approximately balanced
+	// arguments for and against including AI_ADDRCONFIG
+	// in the flags (it includes IPv4 results only on IPv4 systems,
+	// and similarly for IPv6), but in practice setting it causes
+	// getaddrinfo to return the wrong canonical name on Linux.
+	// So definitely leave it out.
+	return C.AI_CANONNAME | C.AI_V4MAPPED | C.AI_ALL
+}