diff -r 000000000000 -r 959103a6100f make/Makefile
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/Makefile	Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,49 @@
+#
+# Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code 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
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+# Locate this Makefile
+ifeq ($(filter /%, $(lastword $(MAKEFILE_LIST))), )
+  makefile_path := $(CURDIR)/$(lastword $(MAKEFILE_LIST))
+else
+  makefile_path := $(lastword $(MAKEFILE_LIST))
+endif
+repo_dir := $(patsubst %/make/Makefile, %, $(makefile_path))
+
+# What is the name of this subsystem (langtools, corba, etc)?
+subsystem_name := $(notdir $(repo_dir))
+
+# Try to locate top-level makefile
+top_level_makefile := $(repo_dir)/../Makefile
+ifneq ($(wildcard $(top_level_makefile)), )
+  $(info Will run $(subsystem_name) target on top-level Makefile)
+  $(info WARNING: This is a non-recommended way of building!)
+  $(info ===================================================)
+else
+  $(info Cannot locate top-level Makefile. Is this repo not checked out as part of a complete forest?)
+  $(error Build from top-level Makefile instead)
+endif
+
+all:
+	@$(MAKE) -f $(top_level_makefile) $(subsystem_name)