libgo: update to Go 1.11

    
    Reviewed-on: https://go-review.googlesource.com/136435

gotools/:
	* Makefile.am (mostlyclean-local): Run chmod on check-go-dir to
	make sure it is writable.
	(check-go-tools): Likewise.
	(check-vet): Copy internal/objabi to check-vet-dir.
	* Makefile.in: Rebuild.

From-SVN: r264546

1 files changed, 18 insertions, 2 deletions

diff --git a/libgo/go/net/conf_test.go b/libgo/go/net/conf_test.go
index 17d03f4..3c7403e 100644
--- a/libgo/go/net/conf_test.go
+++ b/libgo/go/net/conf_test.go
@@ -33,6 +33,7 @@ func TestConfHostLookupOrder(t *testing.T) {
 	tests := []struct {
 		name      string
 		c         *conf
+		resolver  *Resolver
 		hostTests []nssHostTest
 	}{
 		{
@@ -170,7 +171,7 @@ func TestConfHostLookupOrder(t *testing.T) {
 			hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupDNSFiles}},
 		},
 		// glibc lacking an nsswitch.conf, per
-		// http://www.gnu.org/software/libc/manual/html_node/Notes-on-NSS-Configuration-File.html
+		// https://www.gnu.org/software/libc/manual/html_node/Notes-on-NSS-Configuration-File.html
 		{
 			name: "linux_no_nsswitch.conf",
 			c: &conf{
@@ -322,6 +323,21 @@ func TestConfHostLookupOrder(t *testing.T) {
 				{"x.com", "myhostname", hostLookupCgo},
 			},
 		},
+		// Issue 24393: make sure "Resolver.PreferGo = true" acts like netgo.
+		{
+			name:     "resolver-prefergo",
+			resolver: &Resolver{PreferGo: true},
+			c: &conf{
+				goos:               "darwin",
+				forceCgoLookupHost: true, // always true for darwin
+				resolv:             defaultResolvConf,
+				nss:                nssStr(""),
+				netCgo:             true,
+			},
+			hostTests: []nssHostTest{
+				{"localhost", "myhostname", hostLookupFilesDNS},
+			},
+		},
 	}
 
 	origGetHostname := getHostname
@@ -331,7 +347,7 @@ func TestConfHostLookupOrder(t *testing.T) {
 		for _, ht := range tt.hostTests {
 			getHostname = func() (string, error) { return ht.localhost, nil }
 
-			gotOrder := tt.c.hostLookupOrder(ht.host)
+			gotOrder := tt.c.hostLookupOrder(tt.resolver, ht.host)
 			if gotOrder != ht.want {
 				t.Errorf("%s: hostLookupOrder(%q) = %v; want %v", tt.name, ht.host, gotOrder, ht.want)
 			}