misc/cgo/testcarchive: test -buildmode=c-archive

Change-Id: I1668a6885c45180ff88fe673d04cec7eba395ee7
Reviewed-on: https://go-review.googlesource.com/8861Reviewed-by: Ian Lance Taylor <iant@golang.org>

misc/cgo/testcarchive/main.c

+// Copyright 2015 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 <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+typedef struct { char *p; intmax_t n; } GoString;
+extern signed char DidInitRun();
+extern signed char DidMainRun();
+extern GoString FromPkg();
+
+int main(void) {
+	GoString res;
+
+	if (DidMainRun()) {
+		fprintf(stderr, "ERROR: buildmode=c-archive should not run main\n");
+		return 2;
+	}
+
+	if (!DidInitRun()) {
+		fprintf(stderr, "ERROR: buildmode=c-archive init should run\n");
+		return 2;
+	}
+
+	res = FromPkg();
+	if (strcmp(res.p, "str")) {
+		fprintf(stderr, "ERROR: FromPkg()='%s', want 'str'\n", res.p);
+		return 2;
+	}
+
+	return 0;
+}

misc/cgo/testcarchive/src/libgo/libgo.go

+// Copyright 2015 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 main
+
+import _ "p"
+
+import "C"
+
+var (
+	ranInit bool
+	ranMain bool
+)
+
+func init() { ranInit = true }
+
+func main() { ranMain = true }
+
+//export DidInitRun
+func DidInitRun() bool { return ranInit }
+
+//export DidMainRun
+func DidMainRun() bool { return ranMain }

misc/cgo/testcarchive/src/p/p.go

+// Copyright 2015 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 p
+
+import "C"
+
+//export FromPkg
+func FromPkg() string { return "str" }

misc/cgo/testcarchive/test.bash

+#!/usr/bin/env bash
+# Copyright 2015 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
+
+ccargs=""
+if [ "$(go env GOOS)" == "darwin" ]; then
+	ccargs="-Wl,-no_pie"
+	# For darwin/arm.
+	# TODO(crawshaw): Can we do better?
+	ccargs="$ccargs -framework CoreFoundation"
+fi
+
+# TODO(crawshaw): Consider a go env for exec script name.
+bin=./testp
+exec_script=go_$(go env GOOS)_$(go env GOARCH)_exec
+if [ "$(which $exec_script)" != "" ]; then
+	bin="$exec_script ./testp"
+fi
+
+GOPATH=$(pwd) go build -buildmode=c-archive src/libgo/libgo.go
+$(go env CC) $(go env GOGCCFLAGS) $ccargs -o testp main.c libgo.a
+$bin
+rm libgo.a testp
+
+GOPATH=$(pwd) go build -buildmode=c-archive -o libgo.a libgo
+$(go env CC) $(go env GOGCCFLAGS) $ccargs -o testp main.c libgo.a
+$bin
+rm libgo.a testp

src/cmd/dist/test.go

@@ -272,6 +272,10 @@ func (t *tester) registerTests() {
 		} else if t.hasBash() && t.goos != "android" && !iOS {
 			t.registerTest("testso", "../misc/cgo/testso", "./test.bash")
 		}
+		if t.goos == "darwin" && t.goarch == "amd64" {
+			// TODO(crawshaw): add darwin/arm{,64}
+			t.registerTest("testcarchive", "../misc/cgo/testcarchive", "./test.bash")
+		}
 		if t.gohostos == "linux" && t.goarch == "amd64" {
 			t.registerTest("testasan", "../misc/cgo/testasan", "go", "run", "main.go")
 		}