Run darwin/arm64 port natively patch

gistfile1.diff

diff --git a/src/cmd/dist/util.go b/src/cmd/dist/util.go
index cae5d69..7acacd2 100644
--- a/src/cmd/dist/util.go
+++ b/src/cmd/dist/util.go
@@ -429,8 +429,11 @@ func main() {
 		case strings.Contains(out, "ppc64"):
 			gohostarch = "ppc64"
 		case gohostos == "darwin":
-			if strings.Contains(run("", CheckExit, "uname", "-v"), "RELEASE_ARM_") {
+			ver := run("", CheckExit, "uname", "-v")
+			if strings.Contains(ver, "RELEASE_ARM_") {
 				gohostarch = "arm"
+			} else if strings.Contains(ver, "RELEASE_ARM64_") {
+				gohostarch = "arm64"
 			}
 		default:
 			fatal("unknown architecture: %s", out)
diff --git a/src/cmd/internal/ld/lib.go b/src/cmd/internal/ld/lib.go
index 753e8ee..088d77f 100644
--- a/src/cmd/internal/ld/lib.go
+++ b/src/cmd/internal/ld/lib.go
@@ -896,7 +896,11 @@ func hostlink() {
 	}
 
 	if extld == "" {
-		extld = "gcc"
+		if HEADTYPE == obj.Hdarwin {
+			extld = "clang"
+		} else {
+			extld = "gcc"
+		}
 	}
 
 	var argv []string
diff --git a/src/os/file_darwin.go b/src/os/file_darwin.go
index ee3a954..bf24340 100644
--- a/src/os/file_darwin.go
+++ b/src/os/file_darwin.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build cgo
 // +build arm arm64
 
 package os