cmd/cgo: fix Xcode 5 incompatibility for #defined expressions

Ensure that clang always exits with a non-zero status by
giving it something that it always warns about (the statement "1;").

Fixes issue 6128.

R=golang-dev, iant, minux.ma
CC=golang-dev
https://codereview.appspot.com/14702043

1 files changed, 20 insertions, 0 deletions

diff --git a/misc/cgo/test/issue6128.go b/misc/cgo/test/issue6128.go
new file mode 100644
index 000000000..4afba244f
--- /dev/null
+++ b/misc/cgo/test/issue6128.go
@@ -0,0 +1,20 @@
+// Copyright 2013 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.
+
+package cgotest
+
+// Test handling of #defined names in clang.
+// golang.org/issue/6128.
+
+/*
+// NOTE: Must use hex, or else a shortcut for decimals
+// in cgo avoids trying to pass this to clang.
+#define X 0x1
+*/
+import "C"
+
+func test6128() {
+	// nothing to run, just make sure this compiles.
+	_ = C.X
+}