143 lines
3.8 KiB
Go
143 lines
3.8 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build cgo
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// +build cgo
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package so_test
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import (
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"log"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strings"
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"testing"
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)
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func requireTestSOSupported(t *testing.T) {
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t.Helper()
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switch runtime.GOARCH {
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case "arm64":
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if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
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t.Skip("No exec facility on iOS.")
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}
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case "ppc64":
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if runtime.GOOS == "linux" {
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t.Skip("External linking not implemented on linux/ppc64 (issue #8912).")
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}
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}
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if runtime.GOOS == "android" {
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t.Skip("No exec facility on Android.")
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}
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}
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func TestSO(t *testing.T) {
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requireTestSOSupported(t)
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GOPATH, err := os.MkdirTemp("", "cgosotest")
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if err != nil {
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log.Fatal(err)
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}
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defer os.RemoveAll(GOPATH)
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modRoot := filepath.Join(GOPATH, "src", "cgosotest")
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if err := overlayDir(modRoot, "testdata"); err != nil {
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log.Panic(err)
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}
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if err := os.WriteFile(filepath.Join(modRoot, "go.mod"), []byte("module cgosotest\n"), 0666); err != nil {
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log.Panic(err)
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}
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cmd := exec.Command("go", "env", "CC", "GOGCCFLAGS")
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cmd.Dir = modRoot
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cmd.Stderr = new(strings.Builder)
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cmd.Env = append(os.Environ(), "GOPATH="+GOPATH)
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out, err := cmd.Output()
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if err != nil {
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t.Fatalf("%s: %v\n%s", strings.Join(cmd.Args, " "), err, cmd.Stderr)
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}
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lines := strings.Split(string(out), "\n")
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if len(lines) != 3 || lines[2] != "" {
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t.Fatalf("Unexpected output from %s:\n%s", strings.Join(cmd.Args, " "), lines)
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}
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cc := lines[0]
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if cc == "" {
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t.Fatal("CC environment variable (go env CC) cannot be empty")
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}
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gogccflags := strings.Split(lines[1], " ")
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// build shared object
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ext := "so"
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args := append(gogccflags, "-shared")
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switch runtime.GOOS {
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case "darwin", "ios":
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ext = "dylib"
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args = append(args, "-undefined", "suppress", "-flat_namespace")
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case "windows":
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ext = "dll"
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args = append(args, "-DEXPORT_DLL")
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// At least in mingw-clang it is not permitted to just name a .dll
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// on the command line. You must name the corresponding import
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// library instead, even though the dll is used when the executable is run.
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args = append(args, "-Wl,-out-implib,libcgosotest.a")
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case "aix":
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ext = "so.1"
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}
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sofname := "libcgosotest." + ext
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args = append(args, "-o", sofname, "cgoso_c.c")
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cmd = exec.Command(cc, args...)
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cmd.Dir = modRoot
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cmd.Env = append(os.Environ(), "GOPATH="+GOPATH)
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out, err = cmd.CombinedOutput()
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if err != nil {
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t.Fatalf("%s: %s\n%s", strings.Join(cmd.Args, " "), err, out)
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}
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t.Logf("%s:\n%s", strings.Join(cmd.Args, " "), out)
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if runtime.GOOS == "aix" {
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// Shared object must be wrapped by an archive
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cmd = exec.Command("ar", "-X64", "-q", "libcgosotest.a", "libcgosotest.so.1")
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cmd.Dir = modRoot
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out, err = cmd.CombinedOutput()
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if err != nil {
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t.Fatalf("%s: %s\n%s", strings.Join(cmd.Args, " "), err, out)
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}
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}
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cmd = exec.Command("go", "build", "-o", "main.exe", "main.go")
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cmd.Dir = modRoot
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cmd.Env = append(os.Environ(), "GOPATH="+GOPATH)
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out, err = cmd.CombinedOutput()
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if err != nil {
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t.Fatalf("%s: %s\n%s", strings.Join(cmd.Args, " "), err, out)
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}
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t.Logf("%s:\n%s", strings.Join(cmd.Args, " "), out)
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cmd = exec.Command("./main.exe")
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cmd.Dir = modRoot
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cmd.Env = append(os.Environ(), "GOPATH="+GOPATH)
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if runtime.GOOS != "windows" {
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s := "LD_LIBRARY_PATH"
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if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
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s = "DYLD_LIBRARY_PATH"
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}
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cmd.Env = append(os.Environ(), s+"=.")
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// On FreeBSD 64-bit architectures, the 32-bit linker looks for
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// different environment variables.
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if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
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cmd.Env = append(cmd.Env, "LD_32_LIBRARY_PATH=.")
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}
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}
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out, err = cmd.CombinedOutput()
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if err != nil {
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t.Fatalf("%s: %s\n%s", strings.Join(cmd.Args, " "), err, out)
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}
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t.Logf("%s:\n%s", strings.Join(cmd.Args, " "), out)
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}
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