func testMain(m *testing.M) int {
	if testing.Short() && os.Getenv("GO_BUILDER_NAME") == "" {
		globalSkip = func(t *testing.T) { t.Skip("short mode and $GO_BUILDER_NAME not set") }
		return m.Run()
	}
	if !platform.BuildModeSupported(runtime.Compiler, "plugin", runtime.GOOS, runtime.GOARCH) {
		globalSkip = func(t *testing.T) { t.Skip("plugin build mode not supported") }
		return m.Run()
	}
	if !testenv.HasCGO() {