1 #

     2 # Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 # All rights reserved.

     4 # This component and the accompanying materials are made available

     5 # under the terms of the License "Eclipse Public License v1.0"

     6 # which accompanies this distribution, and is available

     7 # at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 #

     9 # Initial Contributors:

    10 # Nokia Corporation - initial contribution.

    11 #

    12 # Contributors:

    13 #

    14 # Description: 

    15 # # Implements a stack mechanism for FLMS

    16 # # Author: Timothy Murphy

    17 # # CHANGE THIS FILE AT YOUR PERIL! :-)

    18 # # It is very sensitive to spaces on the end of variables.

    19 # # It took a lot of trouble to get this exactly right so 

    20 # # be careful about changing it.

    21 # # A "call stack" is necessary for variables which are used

    22 # # in an append-manner by glue makefiles.  This behavior

    23 # # is only needed where and FLM call has the form:

    24 # # 	OUTPUTPATH:=$(OUTPUTPATH)/subdir

    25 # #	include $(FLMHOME)/exefile.flm

    26 # # This is because the outputpath setting must be undone

    27 # # before the next call to an FLM that uses OUTPUTPATH (otherwise it keeps growing)

    28 # # USAGE:

    29 # # $(call vsave,VARIABLE1 VARIABLE2)

    30 # # $(call vrestore)

    31 #

    32 

    33 ifeq ($(VARIABLE_STACK_NAME),)

    34 VARIABLE_STACK_NAME:=STACK

    35 endif

    36 # $(1) should list the variables 

    37 

    38 # vadd must be exactly of the form of 3 lines, the middle one containing "$(1)"

    39 # Otherwise the extra return will be treated like a character rather than as whitespace

    40 

    41 define LINEFEED

    42 

    43 

    44 endef

    45 

    46 define vadd

    47 $(1):=$(2)

    48 

    49 endef

    50 

    51 #

    52 # Create a kind of stack "frame"

    53 # The parameters are names of variables whose values are to be stored in the frame

    54 # so that these values may be restored later.

    55 #

    56 # use thus:

    57 # $(call vsave,OUTPUTPATH SOURCEPATH CDEFS)

    58 #

    59 define vsave

    60 $(eval 

    61 VARIABLE_STACK_NAME:=$(VARIABLE_STACK_NAME).F

    62 $$(VARIABLE_STACK_NAME):=$$(foreach VAR,$(1),$$(call vadd,$$(VAR),$$($$(VAR)))))

    63 endef

    64 

    65 #

    66 # Pop the top stack frame.

    67 #

    68 # use thus:

    69 # $(call vrestore)

    70 #

    71 define vrestore

    72 $(eval $($(VARIABLE_STACK_NAME))

    73 VARIABLE_STACK_NAME:=$(patsubst %.F,%,$(VARIABLE_STACK_NAME))

    74 )

    75 endef

    76