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#
# Copyright (C) 2007 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
SUBTARGETS:=clean download prepare compile install update refresh prereq
subtarget-default = $(filter-out ., \
$(if $($(1)/builddirs-$(2)),$($(1)/builddirs-$(2)), \
$(if $($(1)/builddirs-default),$($(1)/builddirs-default), \
$($(1)/builddirs))))
define subtarget
$(call warn_eval,$(1),t,T,$(1)/$(2): $($(1)/) $(foreach bd,$(call subtarget-default,$(1),$(2)),$(1)/$(bd)/$(2)))
endef
lastdir=$(word $(words $(subst /, ,$(1))),$(subst /, ,$(1)))
diralias=$(if $(findstring $(1),$(call lastdir,$(1))),,$(call lastdir,$(1)))
# Parameters: <subdir>
define subdir
$(call warn,$(1),d,D $(1))
$(foreach bd,$($(1)/builddirs),
$(call warn,$(1),d,BD $(1)/$(bd))
$(foreach target,$(SUBTARGETS),
$(call warn_eval,$(1)/$(bd),t,T,$(1)/$(bd)/$(target): $(if $(QUILT),,$($(1)/$(bd)/$(target)) $(call $(1)//$(target),$(1)/$(bd))))
+$(if $(findstring $(bd),$($(1)/builddirs-parallel)),$$(SUBMAKE),$(_SINGLE)$$(SUBMAKE) -j1) \
-C $(1)/$(bd) $(target) $(if $(findstring $(bd),$($(1)/builddirs-ignore-$(target))), || $(call MESSAGE, ERROR: $(1)/$(bd) failed to build.))
$$(if $(call debug,$(1)/$(bd),v),,.SILENT: $(1)/$(bd)/$(target))
# legacy targets
$(call warn_eval,$(1)/$(bd),l,T,$(1)/$(bd)-$(target): $(1)/$(bd)/$(target))
# aliases
$(if $(call diralias,$(bd)),$(call warn_eval,$(1)/$(bd),l,T,$(1)/$(call diralias,$(bd))/$(target): $(1)/$(bd)/$(target)))
)
)
$(foreach target,$(SUBTARGETS),$(call subtarget,$(1),$(target)))
endef
# Parameters: <subdir> <name> <target> <depends>
define stampfile
$(1)/stamp-$(3):=$(STAGING_DIR)/stamp/.$(2)_$(3)
$$($(1)/stamp-$(3)): $(TMP_DIR)/.build $(4)
@+$(SCRIPT_DIR)/timestamp.pl -n $$($(1)/stamp-$(3)) $(1) $(4) || \
$(MAKE) $$($(1)/flags-$(3)) $(1)/$(3)
@mkdir -p $$$$(dirname $$($(1)/stamp-$(3)))
@touch $$($(1)/stamp-$(3))
$$(if $(call debug,$(1),v),,.SILENT: $$($(1)/stamp-$(3)))
.PRECIOUS: $$($(1)/stamp-$(3)) # work around a make bug
$(1)//clean:=$(1)/stamp-$(3)/clean
$(1)/stamp-$(3)/clean: FORCE
@rm -f $$($(1)/stamp-$(3))
endef
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