Merge "Set IS_AT_LEAST_* variables based on TARGET_PLATFORM_VERSION"

  include $(INTERNAL_BUILD_ID_MAKEFILE)

endif

# Returns all words in $1 up to and including $2

define find_and_earlier

  $(strip $(if $(1),

    $(firstword $(1))

    $(if $(filter $(firstword $(1)),$(2)),,

      $(call find_and_earlier,$(wordlist 2,$(words $(1)),$(1)),$(2)))))

endef

#$(warning $(call find_and_earlier,A B C,A))

#$(warning $(call find_and_earlier,A B C,B))

#$(warning $(call find_and_earlier,A B C,C))

#$(warning $(call find_and_earlier,A B C,D))

define version-list

$(1) $(1)DR1 $(1)DR2 $(1)MR1 $(1)MR2

endef

ALL_VERSIONS := O P

ALL_VERSIONS := $(foreach v,$(ALL_VERSIONS),$(call version-list,$(v)))

ifeq (,$(TARGET_PLATFORM_VERSION))

  # Default targeted platform version

  # TODO: PLATFORM_VERSION, PLATFORM_SDK_VERSION, etc. should be conditional

  # on this

  TARGET_PLATFORM_VERSION := O

endif

ifeq (,$(filter $(ALL_VERSIONS), $(TARGET_PLATFORM_VERSION)))

$(warning Invalid TARGET_PLATFORM_VERSION '$(TARGET_PLATFORM_VERSION)', must be one of)

$(warning $(ALL_VERSIONS))

$(error Stopping...)

endif

ENABLED_VERSIONS := $(call find_and_earlier,$(ALL_VERSIONS),$(TARGET_PLATFORM_VERSION))

$(foreach v,$(ENABLED_VERSIONS), \

  $(eval IS_AT_LEAST_$(v) := true))

ifeq "" "$(PLATFORM_VERSION)"

  # This is the canonical definition of the platform version,

  # which is the version that we reveal to the end user.