--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sbsv2/raptor/lib/flm/stack.mk	Tue Oct 27 16:36:35 2009 +0000
@@ -0,0 +1,76 @@
+#
+# Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+# All rights reserved.
+# This component and the accompanying materials are made available
+# under the terms of the License "Eclipse Public License v1.0"
+# which accompanies this distribution, and is available
+# at the URL "http://www.eclipse.org/legal/epl-v10.html".
+#
+# Initial Contributors:
+# Nokia Corporation - initial contribution.
+#
+# Contributors:
+#
+# Description: 
+# # Implements a stack mechanism for FLMS
+# # Author: Timothy Murphy
+# # CHANGE THIS FILE AT YOUR PERIL! :-)
+# # It is very sensitive to spaces on the end of variables.
+# # It took a lot of trouble to get this exactly right so 
+# # be careful about changing it.
+# # A "call stack" is necessary for variables which are used
+# # in an append-manner by glue makefiles.  This behavior
+# # is only needed where and FLM call has the form:
+# # 	OUTPUTPATH:=$(OUTPUTPATH)/subdir
+# #	include $(FLMHOME)/exefile.flm
+# # This is because the outputpath setting must be undone
+# # before the next call to an FLM that uses OUTPUTPATH (otherwise it keeps growing)
+# # USAGE:
+# # $(call vsave,VARIABLE1 VARIABLE2)
+# # $(call vrestore)
+#
+
+ifeq ($(VARIABLE_STACK_NAME),)
+VARIABLE_STACK_NAME:=STACK
+endif
+# $(1) should list the variables 
+
+# vadd must be exactly of the form of 3 lines, the middle one containing "$(1)"
+# Otherwise the extra return will be treated like a character rather than as whitespace
+
+define LINEFEED
+
+
+endef
+
+define vadd
+$(1):=$(2)
+
+endef
+
+#
+# Create a kind of stack "frame"
+# The parameters are names of variables whose values are to be stored in the frame
+# so that these values may be restored later.
+#
+# use thus:
+# $(call vsave,OUTPUTPATH SOURCEPATH CDEFS)
+#
+define vsave
+$(eval 
+VARIABLE_STACK_NAME:=$(VARIABLE_STACK_NAME).F
+$$(VARIABLE_STACK_NAME):=$$(foreach VAR,$(1),$$(call vadd,$$(VAR),$$($$(VAR)))))
+endef
+
+#
+# Pop the top stack frame.
+#
+# use thus:
+# $(call vrestore)
+#
+define vrestore
+$(eval $($(VARIABLE_STACK_NAME))
+VARIABLE_STACK_NAME:=$(patsubst %.F,%,$(VARIABLE_STACK_NAME))
+)
+endef
+