--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/autoconf/bootcycle-spec.gmk.in	Tue Sep 18 11:29:16 2012 -0700
@@ -0,0 +1,43 @@
+#
+# Copyright (c) 2011, 2012, 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.
+#
+
+# Support for building boot cycle builds
+
+# First include the real base spec.gmk file
+include @SPEC@
+
+# Check that the user did not try to specify a different java to use for compiling.
+ifneq ($(firstword $(SJAVAC_SERVER_JAVA)),$(firstword $(JAVA)))
+  $(error Bootcycle builds are not possible if --with-sjavac-server-java is specified)
+endif
+
+# Override specific values to do a boot cycle build
+
+# The bootcycle build has a different output directory
+BUILD_OUTPUT:=@BUILD_OUTPUT@/bootcycle-build
+
+# Use a different Boot JDK
+BOOT_JDK:=@BUILD_OUTPUT@/images/j2sdk-image
+BOOT_RTJAR:=@BUILD_OUTPUT@/images/j2sdk-image/jre/lib/rt.jar