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cmd/cgo: fix a problem with 'go build -compiler gccgo'

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Port of https://golang.org/cl/154360045 to Git.
Original author is Xia Bin <snyh@snyh.org> (already a contributor).

Fixes #8945.

Change-Id: I28bcaf3348794202ca59fbc3466bd7b9670030e4
Reviewed-on: https://go-review.googlesource.com/11658
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Russ Cox 2015-06-28 23:04:05 -04:00
parent 840965f8d7
commit 4e61c516f4
2 changed files with 18 additions and 2 deletions
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16
misc/cgo/test/issue8945.go Normal file
View File

@ -0,0 +1,16 @@
// 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.
// +build gccgo
package cgotest
//typedef void (*PFunc)();
//PFunc success_cb;
import "C"
//export Test
func Test() {
_ = C.success_cb
}

4
src/cmd/cgo/out.go
View File

@ -118,11 +118,11 @@ func (p *Package) writeDefs() {
}
if !cVars[n.C] {
fmt.Fprintf(fm, "extern char %s[];\n", n.C)
fmt.Fprintf(fm, "void *_cgohack_%s = %s;\n\n", n.C, n.C)
if *gccgo {
fmt.Fprintf(fc, "extern byte *%s;\n", n.C)
} else {
fmt.Fprintf(fm, "extern char %s[];\n", n.C)
fmt.Fprintf(fm, "void *_cgohack_%s = %s;\n\n", n.C, n.C)
fmt.Fprintf(fgo2, "//go:linkname __cgo_%s %s\n", n.C, n.C)
fmt.Fprintf(fgo2, "//go:cgo_import_static %s\n", n.C)
fmt.Fprintf(fgo2, "var __cgo_%s byte\n", n.C)