openwrt中Makefile函数subset分析
2016-05-10 17:59
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假设此处
则
$(1) =target,
则
target/builddirs = linux sdk imagebuilder toolchain SUBTARGETS = clean download prepare compile install update refresh prereq dist distcheck configure buildtypes-$(bd) =
# Parameters: <subdir> define subdir $(call warn,$(1),d,D $(1)) $(foreach bd,$($(1)/builddirs), $(call warn,$(1),d,BD $(1)/$(bd)) $(foreach target,$(SUBTARGETS), $(foreach btype,$(buildtypes-$(bd)), $(call warn_eval,$(1)/$(bd),t,T,$(1)/$(bd)/$(btype)/$(target): $(if $(QUILT),,$($(1)/$(bd)/$(btype)/$(target)) $(call $(1)//$(btype)/$(target),$(1)/$(bd)/$(btype)))) $(if $(call debug,$(1)/$(bd),v),,@)+$$(SUBMAKE) -C $(1)/$(bd) $(btype)-$(target) $(if $(findstring $(bd),$($(1)/builddirs-ignore-$(btype)-$(target))), || $(call ERROR,$(1), ERROR: $(1)/$(bd) [$(btype)] failed to build.)) $(if $(call diralias,$(bd)),$(call warn_eval,$(1)/$(bd),l,T,$(1)/$(call diralias,$(bd))/$(btype)/$(target): $(1)/$(bd)/$(btype)/$(target))) ) $(call warn_eval,$(1)/$(bd),t,T,$(1)/$(bd)/$(target): $(if $(QUILT),,$($(1)/$(bd)/$(target)) $(call $(1)//$(target),$(1)/$(bd)))) $(if $(BUILD_LOG),@mkdir -p $(BUILD_LOG_DIR)/$(1)/$(bd)) $(foreach variant,$(if $(BUILD_VARIANT),$(BUILD_VARIANT),$(if $(strip $($(1)/$(bd)/variants)),$($(1)/$(bd)/variants),$(if $($(1)/$(bd)/default-variant),$($(1)/$(bd)/default-variant),__default))), $(if $(call debug,$(1)/$(bd),v),,@)+$(if $(BUILD_LOG),set -o pipefail;) $$(SUBMAKE) -C $(1)/$(bd) $(target) BUILD_VARIANT="$(filter-out __default,$(variant))" $(if $(BUILD_LOG),SILENT= 2>&1 | tee $(BUILD_LOG_DIR)/$(1)/$(bd)/$(target).txt) $(if $(findstring $(bd),$($(1)/builddirs-ignore-$(target))), || $(call ERROR,$(1), ERROR: $(1)/$(bd) failed to build$(if $(filter-out __default,$(variant)), (build variant: $(variant))).)) ) $(if $(PREREQ_ONLY)$(DUMP_TARGET_DB),, # aliases $(if $(call diralias,$(bd)),$(call warn_eval,$(1)/$(bd),l,T,$(1)/$(call diralias,$(bd))/$(target): $(1)/$(bd)/$(target))) ) ) ) $(foreach target,$(SUBTARGETS),$(call subtarget,$(1),$(target))) endef
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