--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libobjc/Object.m	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,41 @@
+/* The implementation of class Object for Objective-C.
+   Copyright (C) 1993-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3, or (at your option) any
+later version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+License for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#include "objc-private/common.h"
+#include "objc/Object.h"
+#include "objc/runtime.h"
+
+@implementation Object
+
+- (Class)class
+{
+  return object_getClass (self);
+}
+
+- (BOOL)isEqual: (id)anObject
+{
+  return self == anObject;
+}
+
+@end