misc/cgo: re-enable testso

The test.bash file generates .so file using gcc, builds the executable
using the go tool and then run it with the $LD_LIBRARY_PATH variable
pointing to the directory where the .so file lives.

Fixes #2982.

R=rsc, remyoudompheng
CC=golang-dev
https://golang.org/cl/5788043

.hgignore

@@ -27,6 +27,7 @@ doc/tmpltohtml
 doc/articles/wiki/*.bin
 misc/cgo/life/run.out
 misc/cgo/stdio/run.out
+misc/cgo/testso/testso
 misc/dashboard/builder/builder
 misc/goplay/goplay
 misc/osx/*.pkg

misc/cgo/testso/Makefile

-# 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.
-
-include ../../../src/Make.inc
-
-TARG=cgosotest
-
-CGO_DEPS+=libcgoso.so
-CGO_LDFLAGS+=-lcgoso -L.
-CLEANFILES+=out libcgoso.so
-CGOFILES=\
-	cgoso.go\
-
-include ../../../src/Make.pkg
-
-libcgoso.so: cgoso_c.c
-	gcc cgoso_c.c -fPIC -o $@ $(_CGO_CFLAGS_$(GOARCH)) $(_CGO_LDFLAGS_$(GOOS))
-
-out: install main.go
-	$(GC) $(GCFLAGS) $(GCIMPORTS) main.go
-	$(LD) -o $@ main.$O

misc/cgo/testso/cgoso.go

@@ -4,7 +4,10 @@
 
 package cgosotest
 
-//void sofunc(void);
+/*
+#cgo LDFLAGS: -L. -lcgosotest
+void sofunc(void);
+*/
 import "C"
 
 func Test() {

misc/cgo/testso/cgoso_c.c

@@ -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
+
 void sofunc(void)
 {
 	extern void goCallback(void);

misc/cgo/testso/main.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 "cgosotest"
+import "."
 
 func main() {
 	cgosotest.Test()

misc/cgo/testso/test.bash

@@ -4,6 +4,7 @@
 # license that can be found in the LICENSE file.
 
 set -e
-gomake out
-LD_LIBRARY_PATH=. ./out
-gomake clean
+gcc -fPIC -g -shared -o libcgosotest.so cgoso_c.c
+go build main.go
+LD_LIBRARY_PATH=. ./main
+rm -f libcgosotest.so main

src/run.bash

@@ -55,12 +55,10 @@ xcd() {
 go test
 ) || exit $?
 
-$BROKEN ||
 [ "$CGO_ENABLED" != 1 ] ||
 [ "$GOHOSTOS" == windows ] ||
 [ "$GOHOSTOS" == darwin ] ||
 (xcd ../misc/cgo/testso
-"$GOMAKE" clean
 ./test.bash
 ) || exit $?