Imported Upstream version 1upstream/1

31 files changed, 375 insertions, 131 deletions

diff --git a/misc/cgo/gmp/Makefile b/misc/cgo/gmp/Makefile
deleted file mode 100644
index fc6209f27..000000000
--- a/misc/cgo/gmp/Makefile
+++ /dev/null
@@ -1,38 +0,0 @@
-# Copyright 2009 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.
-
-include ../../../src/Make.inc
-
-TARG=gmp
-
-# Can have plain GOFILES too, but this example doesn't.
-
-CGOFILES=\
-	gmp.go
-
-CGO_LDFLAGS=-lgmp
-
-# To add flags necessary for locating the library or its include files,
-# set CGO_CFLAGS or CGO_LDFLAGS.  For example, to use an
-# alternate installation of the library:
-#	CGO_CFLAGS=-I/home/rsc/gmp32/include
-#	CGO_LDFLAGS+=-L/home/rsc/gmp32/lib
-# Note the += on the second line.
-
-CLEANFILES+=pi fib
-
-include ../../../src/Make.pkg
-
-# Simple test programs
-
-# Computes 1000 digits of pi; single-threaded.
-pi: install pi.go
-	$(GC) pi.go
-	$(LD) -o $@ pi.$O
-
-# Computes 200 Fibonacci numbers; multi-threaded.
-fib: install fib.go
-	$(GC) fib.go
-	$(LD) -o $@ fib.$O
-
diff --git a/misc/cgo/gmp/fib.go b/misc/cgo/gmp/fib.go
index 3eda39e17..18434beaf 100644
--- a/misc/cgo/gmp/fib.go
+++ b/misc/cgo/gmp/fib.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // Compute Fibonacci numbers with two goroutines
 // that pass integers back and forth.  No actual
 // concurrency, just threads and synchronization
@@ -10,7 +12,7 @@
 package main
 
 import (
-	big "gmp"
+	big "."
 	"runtime"
 )
 
diff --git a/misc/cgo/gmp/gmp.go b/misc/cgo/gmp/gmp.go
index 3dbc022ce..3bcf99151 100644
--- a/misc/cgo/gmp/gmp.go
+++ b/misc/cgo/gmp/gmp.go
@@ -98,8 +98,20 @@ Go to hang on to a reference to the pointer until C is done with it.
 */
 package gmp
 
-// #include <gmp.h>
-// #include <stdlib.h>
+/*
+#cgo LDFLAGS: -lgmp
+#include <gmp.h>
+#include <stdlib.h>
+
+// gmp 5.0.0+ changed the type of the 3rd argument to mp_bitcnt_t,
+// so, to support older versions, we wrap these two functions.
+void _mpz_mul_2exp(mpz_ptr a, mpz_ptr b, unsigned long n) {
+	mpz_mul_2exp(a, b, n);
+}
+void _mpz_div_2exp(mpz_ptr a, mpz_ptr b, unsigned long n) {
+	mpz_div_2exp(a, b, n);
+}
+*/
 import "C"
 
 import (
@@ -179,15 +191,15 @@ func (z *Int) SetInt64(x int64) *Int {
 // SetString interprets s as a number in the given base
 // and sets z to that value.  The base must be in the range [2,36].
 // SetString returns an error if s cannot be parsed or the base is invalid.
-func (z *Int) SetString(s string, base int) os.Error {
+func (z *Int) SetString(s string, base int) error {
 	z.doinit()
 	if base < 2 || base > 36 {
-		return os.EINVAL
+		return os.ErrInvalid
 	}
 	p := C.CString(s)
 	defer C.free(unsafe.Pointer(p))
 	if C.mpz_set_str(&z.i[0], p, C.int(base)) < 0 {
-		return os.EINVAL
+		return os.ErrInvalid
 	}
 	return nil
 }
@@ -265,7 +277,7 @@ func (z *Int) Mod(x, y *Int) *Int {
 func (z *Int) Lsh(x *Int, s uint) *Int {
 	x.doinit()
 	z.doinit()
-	C.mpz_mul_2exp(&z.i[0], &x.i[0], C.mp_bitcnt_t(s))
+	C._mpz_mul_2exp(&z.i[0], &x.i[0], C.ulong(s))
 	return z
 }
 
@@ -273,7 +285,7 @@ func (z *Int) Lsh(x *Int, s uint) *Int {
 func (z *Int) Rsh(x *Int, s uint) *Int {
 	x.doinit()
 	z.doinit()
-	C.mpz_div_2exp(&z.i[0], &x.i[0], C.mp_bitcnt_t(s))
+	C._mpz_div_2exp(&z.i[0], &x.i[0], C.ulong(s))
 	return z
 }
 
diff --git a/misc/cgo/gmp/pi.go b/misc/cgo/gmp/pi.go
index 45f61abbd..1914cf214 100644
--- a/misc/cgo/gmp/pi.go
+++ b/misc/cgo/gmp/pi.go
@@ -1,3 +1,5 @@
+// +build ignore
+
 /*
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
@@ -38,7 +40,7 @@ POSSIBILITY OF SUCH DAMAGE.
 package main
 
 import (
-	big "gmp"
+	big "."
 	"fmt"
 	"runtime"
 )
@@ -100,5 +102,5 @@ func main() {
 		}
 	}
 
-	fmt.Printf("\n%d calls; bit sizes: %d %d %d\n", runtime.Cgocalls(), numer.Len(), accum.Len(), denom.Len())
+	fmt.Printf("\n%d calls; bit sizes: %d %d %d\n", runtime.NumCgoCall(), numer.Len(), accum.Len(), denom.Len())
 }
diff --git a/misc/cgo/life/Makefile b/misc/cgo/life/Makefile
deleted file mode 100644
index 5a10380ed..000000000
--- a/misc/cgo/life/Makefile
+++ /dev/null
@@ -1,21 +0,0 @@
-# Copyright 2010 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.
-
-include ../../../src/Make.inc
-
-TARG=life
-
-CGOFILES=\
-	life.go\
-
-CGO_OFILES=\
-	c-life.o\
-
-CLEANFILES+=life
-
-include ../../../src/Make.pkg
-
-life: install main.go
-	$(GC) main.go
-	$(LD) -o $@ main.$O
diff --git a/misc/cgo/life/main.go b/misc/cgo/life/main.go
index 9cfed434b..47ae0e18c 100644
--- a/misc/cgo/life/main.go
+++ b/misc/cgo/life/main.go
@@ -2,14 +2,16 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // Run the game of life in C using Go for parallelization.
 
 package main
 
 import (
+	"."
 	"flag"
 	"fmt"
-	"life"
 )
 
 const MAXDIM = 100
diff --git a/misc/cgo/life/test.bash b/misc/cgo/life/test.bash
index 5c5fba1a9..bb483522c 100755
--- a/misc/cgo/life/test.bash
+++ b/misc/cgo/life/test.bash
@@ -4,8 +4,11 @@
 # license that can be found in the LICENSE file.
 
 set -e
-gomake life
+go build -o life main.go
+
 echo '*' life >run.out
 ./life >>run.out
 diff run.out golden.out
-gomake clean
+
+rm -f life
+
diff --git a/misc/cgo/stdio/Makefile b/misc/cgo/stdio/Makefile
deleted file mode 100644
index 3f7a4c01c..000000000
--- a/misc/cgo/stdio/Makefile
+++ /dev/null
@@ -1,17 +0,0 @@
-# Copyright 2009 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.
-
-include ../../../src/Make.inc
-
-TARG=stdio
-CGOFILES=\
-	file.go\
-
-CLEANFILES+=hello fib chain run.out
-
-include ../../../src/Make.pkg
-
-%: install %.go
-	$(GC) $*.go
-	$(LD) -o $@ $*.$O
diff --git a/misc/cgo/stdio/chain.go b/misc/cgo/stdio/chain.go
index c188b2dd9..1cf0b1fe5 100644
--- a/misc/cgo/stdio/chain.go
+++ b/misc/cgo/stdio/chain.go
@@ -2,13 +2,15 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // Pass numbers along a chain of threads.
 
 package main
 
 import (
+	"../stdio"
 	"runtime"
-	"stdio"
 	"strconv"
 )
 
diff --git a/misc/cgo/stdio/fib.go b/misc/cgo/stdio/fib.go
index c02e31fd8..6d3ccfd52 100644
--- a/misc/cgo/stdio/fib.go
+++ b/misc/cgo/stdio/fib.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 // Compute Fibonacci numbers with two goroutines
 // that pass integers back and forth.  No actual
 // concurrency, just threads and synchronization
@@ -10,8 +12,8 @@
 package main
 
 import (
+	"../stdio"
 	"runtime"
-	"stdio"
 	"strconv"
 )
 
@@ -26,7 +28,7 @@ func fibber(c, out chan int64, i int64) {
 	}
 	for {
 		j := <-c
-		stdio.Stdout.WriteString(strconv.Itoa64(j) + "\n")
+		stdio.Stdout.WriteString(strconv.FormatInt(j, 10) + "\n")
 		out <- j
 		<-out
 		i += j
diff --git a/misc/cgo/stdio/file.go b/misc/cgo/stdio/file.go
index ab1e88436..6e7d479ad 100644
--- a/misc/cgo/stdio/file.go
+++ b/misc/cgo/stdio/file.go
@@ -28,7 +28,7 @@ var Stderr = (*File)(C.stderr)
 
 // Test reference to library symbol.
 // Stdout and stderr are too special to be a reliable test.
-var myerr = C.sys_errlist
+//var  = C.environ
 
 func (f *File) WriteString(s string) {
 	p := C.CString(s)
diff --git a/misc/cgo/stdio/hello.go b/misc/cgo/stdio/hello.go
index 58fc6d574..4ab3c7447 100644
--- a/misc/cgo/stdio/hello.go
+++ b/misc/cgo/stdio/hello.go
@@ -2,9 +2,11 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package main
 
-import "stdio"
+import "../stdio"
 
 func main() {
 	stdio.Stdout.WriteString(stdio.Greeting + "\n")
diff --git a/misc/cgo/stdio/test.bash b/misc/cgo/stdio/test.bash
index 82e3f7b45..21829fa31 100755
--- a/misc/cgo/stdio/test.bash
+++ b/misc/cgo/stdio/test.bash
@@ -4,7 +4,10 @@
 # license that can be found in the LICENSE file.
 
 set -e
-gomake hello fib chain
+go build hello.go
+go build fib.go
+go build chain.go
+
 echo '*' hello >run.out
 ./hello >>run.out
 echo '*' fib >>run.out
@@ -12,4 +15,6 @@ echo '*' fib >>run.out
 echo '*' chain >>run.out
 ./chain >>run.out
 diff run.out golden.out
-gomake clean
+
+rm -f hello fib chain
+
diff --git a/misc/cgo/test/Makefile b/misc/cgo/test/Makefile
index d4309be3c..2b7187acb 100644
--- a/misc/cgo/test/Makefile
+++ b/misc/cgo/test/Makefile
@@ -12,9 +12,11 @@ CGOFILES=\
 	callback.go\
 	env.go\
 	exports.go\
+	helpers.go\
 	issue1222.go\
 	issue1328.go\
 	issue1560.go\
+	issue2462.go\
 	duplicate_symbol.go\
 
 CGO_OFILES=\
@@ -23,4 +25,24 @@ CGO_OFILES=\
 OFILES=\
 	runtime.$O\
 
+ifeq ($(GOOS),windows)
+GCCVERSION=$(shell gcc -dumpversion)
+ifeq ($(GOARCH),386)
+GCCLIBDIR=/mingw/lib/gcc/mingw32/$(GCCVERSION)
+CHKSTK=_chkstk.o
+else
+GCCLIBDIR=/mingw/lib/gcc/x86_64-w64-mingw32/$(GCCVERSION)
+CHKSTK=_chkstk_ms.o
+endif
+
+CGOFILES+=sleep_windows.go
+CGO_OFILES+=$(CHKSTK)
+
+$(CHKSTK):
+	ar -x "$(GCCLIBDIR)/libgcc.a" $@
+endif
+
 include ../../../src/Make.pkg
+
+test:
+	echo cgo: tests disabled. gotest is gone. TODO
\ No newline at end of file
diff --git a/misc/cgo/test/align.go b/misc/cgo/test/align.go
index 07ab9ef50..a23b44fc3 100644
--- a/misc/cgo/test/align.go
+++ b/misc/cgo/test/align.go
@@ -1,3 +1,7 @@
+// Copyright 2010 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
 
 /*
diff --git a/misc/cgo/test/backdoor/backdoor.go b/misc/cgo/test/backdoor/backdoor.go
new file mode 100644
index 000000000..efe4f01f4
--- /dev/null
+++ b/misc/cgo/test/backdoor/backdoor.go
@@ -0,0 +1,7 @@
+// Copyright 2012 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 backdoor
+
+func LockedOSThread() bool // in runtime.c
diff --git a/misc/cgo/test/runtime.c b/misc/cgo/test/backdoor/runtime.c
index e087c7622..54e6a1ef8 100644
--- a/misc/cgo/test/runtime.c
+++ b/misc/cgo/test/backdoor/runtime.c
@@ -3,6 +3,8 @@
 // license that can be found in the LICENSE file.
 
 // Expose some runtime functions for testing.
+// Must be in a non-cgo-using package so that
+// the go command compiles this file with 6c, not gcc.
 
 typedef char bool;
 
@@ -14,7 +16,7 @@ FLUSH(void*)
 }
 
 void
-·lockedOSThread(bool b)
+·LockedOSThread(bool b)
 {
 	b = runtime·lockedOSThread();
 	FLUSH(&b);
diff --git a/misc/cgo/test/basic.go b/misc/cgo/test/basic.go
index b9d0953bd..70ec5e43a 100644
--- a/misc/cgo/test/basic.go
+++ b/misc/cgo/test/basic.go
@@ -48,10 +48,14 @@ struct ibv_async_event {
 struct ibv_context {
 	xxpthread_mutex_t mutex;
 };
+
+int add(int x, int y) {
+	return x+y;
+};
 */
 import "C"
 import (
-	"os"
+	"syscall"
 	"testing"
 	"unsafe"
 )
@@ -65,18 +69,7 @@ func uuidgen() {
 	C.uuid_generate(&uuid[0])
 }
 
-func Size(name string) (int64, os.Error) {
-	var st C.struct_stat
-	p := C.CString(name)
-	_, err := C.stat(p, &st)
-	C.free(unsafe.Pointer(p))
-	if err != nil {
-		return 0, err
-	}
-	return int64(C.ulong(st.st_size)), nil
-}
-
-func Strtol(s string, base int) (int, os.Error) {
+func Strtol(s string, base int) (int, error) {
 	p := C.CString(s)
 	n, err := C.strtol(p, nil, C.int(base))
 	C.free(unsafe.Pointer(p))
@@ -108,9 +101,17 @@ func testAtol(t *testing.T) {
 }
 
 func testErrno(t *testing.T) {
-	n, err := Strtol("asdf", 123)
-	if n != 0 || err != os.EINVAL {
-		t.Error("Strtol: ", n, err)
+	p := C.CString("no-such-file")
+	m := C.CString("r")
+	f, err := C.fopen(p, m)
+	C.free(unsafe.Pointer(p))
+	C.free(unsafe.Pointer(m))
+	if err == nil {
+		C.fclose(f)
+		t.Fatalf("C.fopen: should fail")
+	}
+	if err != syscall.ENOENT {
+		t.Fatalf("C.fopen: unexpected error: %v", err)
 	}
 }
 
@@ -124,11 +125,19 @@ func testMultipleAssign(t *testing.T) {
 }
 
 var (
-	uint  = (C.uint)(0)
-	ulong C.ulong
-	char  C.char
+	cuint  = (C.uint)(0)
+	culong C.ulong
+	cchar  C.char
 )
 
 type Context struct {
 	ctx *C.struct_ibv_context
 }
+
+func benchCgoCall(b *testing.B) {
+	const x = C.int(2)
+	const y = C.int(3)
+	for i := 0; i < b.N; i++ {
+		C.add(x, y)
+	}
+}
diff --git a/misc/cgo/test/callback.go b/misc/cgo/test/callback.go
index 3edee9758..e6a1462b3 100644
--- a/misc/cgo/test/callback.go
+++ b/misc/cgo/test/callback.go
@@ -1,15 +1,17 @@
+// 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.
+
 package cgotest
 
 /*
 void callback(void *f);
-void callGoFoo(void) {
-	extern void goFoo(void);
-	goFoo();
-}
+void callGoFoo(void);
 */
 import "C"
 
 import (
+	"./backdoor"
 	"runtime"
 	"testing"
 	"unsafe"
@@ -39,7 +41,7 @@ func testCallbackGC(t *testing.T) {
 	nestedCall(runtime.GC)
 }
 
-func lockedOSThread() bool // in runtime.c
+var lockedOSThread = backdoor.LockedOSThread
 
 func testCallbackPanic(t *testing.T) {
 	// Make sure panic during callback unwinds properly.
@@ -65,7 +67,7 @@ func testCallbackPanic(t *testing.T) {
 func testCallbackPanicLoop(t *testing.T) {
 	// Make sure we don't blow out m->g0 stack.
 	for i := 0; i < 100000; i++ {
-		TestCallbackPanic(t)
+		testCallbackPanic(t)
 	}
 }
 
diff --git a/misc/cgo/test/callback_c.c b/misc/cgo/test/callback_c.c
index 5983a5e11..47f07301b 100644
--- a/misc/cgo/test/callback_c.c
+++ b/misc/cgo/test/callback_c.c
@@ -8,5 +8,30 @@
 void
 callback(void *f)
 {
+	// use some stack space
+	volatile char data[64*1024];
+
+	data[0] = 0;
 	goCallback(f);
+        data[sizeof(data)-1] = 0;
+}
+
+void
+callGoFoo(void)
+{
+	extern void goFoo(void);
+	goFoo();
+}
+
+void
+IntoC(void)
+{
+	BackIntoGo();
+}
+
+void
+twoSleep(int n)
+{
+	BackgroundSleep(n);
+	sleep(n);
 }
diff --git a/misc/cgo/test/cgo_test.go b/misc/cgo/test/cgo_test.go
index 94fba15db..34beee69d 100644
--- a/misc/cgo/test/cgo_test.go
+++ b/misc/cgo/test/cgo_test.go
@@ -26,3 +26,6 @@ func TestBlocking(t *testing.T)            { testBlocking(t) }
 func Test1328(t *testing.T)                { test1328(t) }
 func TestParallelSleep(t *testing.T)       { testParallelSleep(t) }
 func TestSetEnv(t *testing.T)              { testSetEnv(t) }
+func TestHelpers(t *testing.T)             { testHelpers(t) }
+
+func BenchmarkCgoCall(b *testing.B) { benchCgoCall(b) }
diff --git a/misc/cgo/test/env.go b/misc/cgo/test/env.go
index 1fb4e684c..8d3ba5877 100644
--- a/misc/cgo/test/env.go
+++ b/misc/cgo/test/env.go
@@ -10,12 +10,21 @@ package cgotest
 import "C"
 import (
 	"os"
+	"runtime"
 	"testing"
 	"unsafe"
 )
 
 // This is really an os package test but here for convenience.
 func testSetEnv(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		// Go uses SetEnvironmentVariable on windows. Howerver,
+		// C runtime takes a *copy* at process startup of thei
+		// OS environment, and stores it in environ/envp.
+		// It is this copy that	getenv/putenv manipulate.
+		t.Logf("skipping test")
+		return
+	}
 	const key = "CGO_OS_TEST_KEY"
 	const val = "CGO_OS_TEST_VALUE"
 	os.Setenv(key, val)
diff --git a/misc/cgo/test/helpers.go b/misc/cgo/test/helpers.go
new file mode 100644
index 000000000..890dcbdf1
--- /dev/null
+++ b/misc/cgo/test/helpers.go
@@ -0,0 +1,35 @@
+// 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.
+
+package cgotest
+
+// const char *greeting = "hello, world";
+import "C"
+
+import (
+	"reflect"
+	"testing"
+	"unsafe"
+)
+
+const greeting = "hello, world"
+
+type testPair struct {
+	Name      string
+	Got, Want interface{}
+}
+
+var testPairs = []testPair{
+	{"GoString", C.GoString(C.greeting), greeting},
+	{"GoStringN", C.GoStringN(C.greeting, 5), greeting[:5]},
+	{"GoBytes", C.GoBytes(unsafe.Pointer(C.greeting), 5), []byte(greeting[:5])},
+}
+
+func testHelpers(t *testing.T) {
+	for _, pair := range testPairs {
+		if !reflect.DeepEqual(pair.Got, pair.Want) {
+			t.Errorf("%s: got %#v, want %#v", pair.Name, pair.Got, pair.Want)
+		}
+	}
+}
diff --git a/misc/cgo/test/issue1328.go b/misc/cgo/test/issue1328.go
index e01207dd9..e1796d6f7 100644
--- a/misc/cgo/test/issue1328.go
+++ b/misc/cgo/test/issue1328.go
@@ -7,7 +7,7 @@ package cgotest
 import "testing"
 
 // extern void BackIntoGo(void);
-// void IntoC() { BackIntoGo(); }
+// void IntoC(void);
 import "C"
 
 //export BackIntoGo
diff --git a/misc/cgo/test/issue1560.go b/misc/cgo/test/issue1560.go
index e534cce47..3faa966e7 100644
--- a/misc/cgo/test/issue1560.go
+++ b/misc/cgo/test/issue1560.go
@@ -7,11 +7,10 @@ package cgotest
 /*
 #include <unistd.h>
 
+unsigned int sleep(unsigned int seconds);
+
 extern void BackgroundSleep(int);
-void twoSleep(int n) {
-	BackgroundSleep(n);
-	sleep(n);
-}
+void twoSleep(int);
 */
 import "C"
 
@@ -36,11 +35,11 @@ func BackgroundSleep(n int) {
 }
 
 func testParallelSleep(t *testing.T) {
-	dt := -time.Nanoseconds()
+	start := time.Now()
 	parallelSleep(1)
-	dt += time.Nanoseconds()
+	dt := time.Now().Sub(start)
 	// bug used to run sleeps in serial, producing a 2-second delay.
-	if dt >= 1.3e9 {
-		t.Fatalf("parallel 1-second sleeps slept for %f seconds", float64(dt)/1e9)
+	if dt >= 1300*time.Millisecond {
+		t.Fatalf("parallel 1-second sleeps slept for %f seconds", dt.Seconds())
 	}
 }
diff --git a/misc/cgo/test/issue2462.go b/misc/cgo/test/issue2462.go
new file mode 100644
index 000000000..12cd91d05
--- /dev/null
+++ b/misc/cgo/test/issue2462.go
@@ -0,0 +1,102 @@
+// 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.
+
+package cgotest
+
+import "C"
+
+//export exportbyte
+func exportbyte() byte {
+	return 0
+}
+
+//export exportbool
+func exportbool() bool {
+	return false
+}
+
+//export exportrune
+func exportrune() rune {
+	return 0
+}
+
+//export exporterror
+func exporterror() error {
+	return nil
+}
+
+//export exportint
+func exportint() int {
+	return 0
+}
+
+//export exportuint
+func exportuint() uint {
+	return 0
+}
+
+//export exportuintptr
+func exportuintptr() uintptr {
+	return (uintptr)(0)
+}
+
+//export exportint8
+func exportint8() int8 {
+	return 0
+}
+
+//export exportuint8
+func exportuint8() uint8 {
+	return 0
+}
+
+//export exportint16
+func exportint16() int16 {
+	return 0
+}
+
+//export exportuint16
+func exportuint16() uint16 {
+	return 0
+}
+
+//export exportint32
+func exportint32() int32 {
+	return 0
+}
+
+//export exportuint32
+func exportuint32() uint32 {
+	return 0
+}
+
+//export exportint64
+func exportint64() int64 {
+	return 0
+}
+
+//export exportuint64
+func exportuint64() uint64 {
+	return 0
+}
+
+//export exportfloat32
+func exportfloat32() float32 {
+	return 0
+}
+
+//export exportfloat64
+func exportfloat64() float64 {
+	return 0
+}
+
+//export exportcomplex64
+func exportcomplex64() complex64 {
+	return 0
+}
+
+//export exportcomplex128
+func exportcomplex128() complex128 {
+	return 0
+}
diff --git a/misc/cgo/test/sleep_windows.go b/misc/cgo/test/sleep_windows.go
new file mode 100644
index 000000000..007a1bb4c
--- /dev/null
+++ b/misc/cgo/test/sleep_windows.go
@@ -0,0 +1,16 @@
+// 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.
+
+package cgotest
+
+/*
+#include <windows.h>
+
+unsigned int sleep(unsigned int seconds) {
+	Sleep(1000 * seconds);
+	return 0;
+}
+
+*/
+import "C"
diff --git a/misc/cgo/testso/cgoso.go b/misc/cgo/testso/cgoso.go
new file mode 100644
index 000000000..44fb616c1
--- /dev/null
+++ b/misc/cgo/testso/cgoso.go
@@ -0,0 +1,19 @@
+// 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.
+
+package cgosotest
+
+/*
+#cgo LDFLAGS: -L. -lcgosotest
+void sofunc(void);
+*/
+import "C"
+
+func Test() {
+	C.sofunc()
+}
+
+//export goCallback
+func goCallback() {
+}
diff --git a/misc/cgo/testso/cgoso_c.c b/misc/cgo/testso/cgoso_c.c
new file mode 100644
index 000000000..8c15a6b9f
--- /dev/null
+++ b/misc/cgo/testso/cgoso_c.c
@@ -0,0 +1,11 @@
+// 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 ignore
+
+void sofunc(void)
+{
+	extern void goCallback(void);
+	goCallback();
+}
diff --git a/misc/cgo/testso/main.go b/misc/cgo/testso/main.go
new file mode 100644
index 000000000..88aa4322d
--- /dev/null
+++ b/misc/cgo/testso/main.go
@@ -0,0 +1,13 @@
+// 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 ignore
+
+package main
+
+import "."
+
+func main() {
+	cgosotest.Test()
+}
diff --git a/misc/cgo/testso/test.bash b/misc/cgo/testso/test.bash
new file mode 100755
index 000000000..ecef873c8
--- /dev/null
+++ b/misc/cgo/testso/test.bash
@@ -0,0 +1,10 @@
+#!/bin/sh
+# 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.
+
+set -e
+gcc $(go env GOGCCFLAGS) -shared -o libcgosotest.so cgoso_c.c
+go build main.go
+LD_LIBRARY_PATH=. ./main
+rm -f libcgosotest.so main