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# file : Bootstrap.rules
# author : Boris Kolpackov <boris@kolpackov.net>
# cvs-id : $Id$
# basics
#
#
define set
$(eval $1 := $(strip $2))
endef
define get
$(value $(strip $1))
endef
define sub
$(shell echo $$(($1-$2)))
endef
define add
$(shell echo $$(($1+$2)))
endef
# stack
#
#
define push
$(eval $1 +=$(strip $2))
endef
define pop
$(eval $1 :=$(wordlist 1,$(call sub, $(words $(value $(strip $1))), 1),$(value $(strip $1))))
endef
define top
$(word $(words $(value $(strip $1))),$(value $(strip $1)))
endef
# local
#
#
define path_to_id
$(subst /,_,$(subst .,_,$(strip $1)))
endef
MAKEFILE := $(word $(call sub,$(words $(MAKEFILE_LIST)),1),$(MAKEFILE_LIST))
INCLUSION_ID := $(call path_to_id,$(MAKEFILE))
define get_inclusion_id
$(INCLUSION_ID)
endef
define local_set
$(eval $(strip $(call get_inclusion_id))_$1 := $(strip $2))
endef
define local_get
$($(strip $(call get_inclusion_id))_$1)
endef
define local_origin
$(origin $(strip $(call get_inclusion_id))_$1)
endef
define _get_inclusion_count
$(if $(call local_get,INCLUSION_COUNT),$(call local_get,INCLUSION_COUNT),0)
endef
define _set_inclusion_count
$(call local_set,INCLUSION_COUNT,$1)
endef
# include
#
#
define include
$(strip
$(eval $(call push, include_stack, $(MAKEFILE))) \
$(eval MAKEFILE :=$(strip $1)) \
$(eval $(call push, inclusion_id_stack, $(INCLUSION_ID))) \
$(eval $(call _set_inclusion_count,$(call add,$(call _get_inclusion_count),1))) \
$(eval INCLUSION_ID :=$(INCLUSION_ID)_$(call local_get,INCLUSION_COUNT)_$(call path_to_id,$1)) \
$(eval include $1) \
$(eval INCLUSION_ID :=$(call top, inclusion_id_stack)) \
$(eval $(call pop, inclusion_id_stack)) \
$(eval MAKEFILE :=$(call top, include_stack)) \
$(eval $(call pop, include_stack)))
endef
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