From 343d113610d22dfcb79442c2ef2e9701b741e451 Mon Sep 17 00:00:00 2001
From: Chris Manghane <cmang@golang.org>
Date: Wed, 15 Oct 2014 13:13:37 -0700
Subject: [PATCH] cmd/go: add '_go_' suffix to go files compiled by gccgo to
 avoid naming conflicts

Fixes #8828.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/154410043
---
 misc/cgo/test/issue8828.go          | 16 ++++++++++++++++
 misc/cgo/test/issue8828/issue8828.c |  7 +++++++
 misc/cgo/test/issue8828/trivial.go  |  8 ++++++++
 src/cmd/go/build.go                 |  2 +-
 4 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 misc/cgo/test/issue8828.go
 create mode 100644 misc/cgo/test/issue8828/issue8828.c
 create mode 100644 misc/cgo/test/issue8828/trivial.go

diff --git a/misc/cgo/test/issue8828.go b/misc/cgo/test/issue8828.go
new file mode 100644
index 0000000000..304797c929
--- /dev/null
+++ b/misc/cgo/test/issue8828.go
@@ -0,0 +1,16 @@
+// compile
+
+// Copyright 2014 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.
+
+// Issue 8828: compiling a file with -compiler=gccgo fails if a .c file
+// has the same name as compiled directory.
+
+package cgotest
+
+import "./issue8828"
+
+func p() {
+	issue8828.Bar()
+}
diff --git a/misc/cgo/test/issue8828/issue8828.c b/misc/cgo/test/issue8828/issue8828.c
new file mode 100644
index 0000000000..2950f87cfb
--- /dev/null
+++ b/misc/cgo/test/issue8828/issue8828.c
@@ -0,0 +1,7 @@
+// Copyright 2014 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.
+
+void foo()
+{
+}
diff --git a/misc/cgo/test/issue8828/trivial.go b/misc/cgo/test/issue8828/trivial.go
new file mode 100644
index 0000000000..e7b9a4e573
--- /dev/null
+++ b/misc/cgo/test/issue8828/trivial.go
@@ -0,0 +1,8 @@
+package issue8828
+
+//void foo();
+import "C"
+
+func Bar() {
+	C.foo()
+}
diff --git a/src/cmd/go/build.go b/src/cmd/go/build.go
index 9c7b42650a..49b84709e2 100644
--- a/src/cmd/go/build.go
+++ b/src/cmd/go/build.go
@@ -1852,7 +1852,7 @@ func (gccgoToolchain) linker() string {
 }
 
 func (gccgoToolchain) gc(b *builder, p *Package, archive, obj string, importArgs []string, gofiles []string) (ofile string, output []byte, err error) {
-	out := p.Name + ".o"
+	out := "_go_.o"
 	ofile = obj + out
 	gcargs := []string{"-g"}
 	gcargs = append(gcargs, b.gccArchArgs()...)
-- 
2.50.0