LOCAL_PATH := $(call my-dir)

# Only load these subdirs when 3rd party packages have been requested.
ifneq ($(PRODUCT_3RD_PARTY_PACKAGES),)

3RD_PARTY_CC := $(HOST_OUT_EXECUTABLES)/3rd-party-gcc
3RD_PARTY_CXX := $(HOST_OUT_EXECUTABLES)/3rd-party-g++
3RD_PARTY_PKG_CONFIG := $(HOST_OUT_EXECUTABLES)/3rd-party-pkg-config

TARGET_OUT_GENTOO := $(TARGET_OUT_INTERMEDIATES)/gentoo
TARGET_OUT_COMMON_GENTOO := $(TARGET_OUT_COMMON_INTERMEDIATES)/gentoo
3RD_PARTY_ROOT := $(TARGET_OUT_GENTOO)/root
3RD_PARTY_ROOT_SUBDIR := $(patsubst $(PRODUCT_OUT)/%,%,$(3RD_PARTY_ROOT))

# We have to include subdirs first as they set up some vars we use below.
3RD_PARTY_CONFIGS :=
3RD_PARTY_WRAPPERS :=
include $(call all-subdir-makefiles)

# Actually run the emerge command for the specific package.
%.emerge: TARGET_TO_ATOM = $(notdir $(patsubst %/,%,$(dir $(1))))/$(notdir $(1:.emerge=))
%.emerge: | $(3RD_PARTY_WRAPPERS) $(3RD_PARTY_CONFIGS)
	$(hide)mkdir -p $(dir $@) $(TARGET_OUT_GENTOO)/tmp
	$(hide)emerge $(call TARGET_TO_ATOM,$@)
	$(hide)3rd-party-merge \
		--package $(call TARGET_TO_ATOM,$@) \
		--input-root $(3RD_PARTY_ROOT) \
		--output-root $(TARGET_OUT) \
		--make-root $(TARGET_OUT_GENTOO)/mk-installed
	$(hide)touch $@

# Set up a module for each requested package.
define 3rd-party-merge
include $(CLEAR_VARS)
LOCAL_MODULE := mk-installed/$(1).emerge
LOCAL_MODULE_CLASS := GENTOO
LOCAL_UNINSTALLABLE_MODULE := true
include $$(BUILD_SYSTEM)/base_rules.mk
endef
$(foreach p,$(PRODUCT_3RD_PARTY_PACKAGES),$(eval $(call 3rd-party-merge,$(p))))

# A pseudo target that depends on all the generated packages above.
# The board can use this in their PRODUCT_PACKAGES list.
include $(CLEAR_VARS)
LOCAL_MODULE := 3rd-party-packages
LOCAL_MODULE_CLASS := GENTOO
LOCAL_ADDITIONAL_DEPENDENCIES := $(foreach p,$(PRODUCT_3RD_PARTY_PACKAGES),mk-installed/$(p).emerge)
include $(BUILD_SYSTEM)/base_rules.mk
LOCAL_BUILT_MODULE := $(intermediates)/$(LOCAL_MODULE)
$(LOCAL_BUILT_MODULE): $(LOCAL_ADDITIONAL_DEPENDENCIES)
	$(hide)mkdir -p $(dir $@)
	$(hide)touch $@

endif