include/subdir.mk

   1 # debug flags:
   2 #
   3 # d: show subdirectory tree
   4 # t: show added targets
   5 # l: show legacy targets
   6
   7 ifeq ($(DEBUG),all)
   8   build_debug:=dt
   9 else
  10   build_debug:=$(DEBUG)
  11 endif
  12
  13 define debug
  14 $$(findstring $(2),$$(if $$(DEBUG_DIR),$$(if $$(filter $$(DEBUG_DIR)%,$(1)),$(build_debug)),$(build_debug)))
  15 endef
  16
  17 define warn
  18 $$(if $(call debug,$(1),$(2)),$$(warning $(3)))
  19 endef
  20
  21 define warn_eval
  22 $(call warn,$(1),$(2),$(3)      $(4))
  23 $(4)
  24 endef
  25
  26 dep/compile=$(1)/prepare
  27 dep/install=$(1)/compile
  28 SUBTARGETS:=clean download prepare compile install update refresh prereq
  29
  30 # Parameters: <subdir>
  31 define subdir
  32   $(call warn,$(1),d,D $(1))
  33   $(foreach bd,$($(1)/builddirs),
  34     $(call warn,$(1),d,BD $(1)/$(bd))
  35     $(foreach target,$(SUBTARGETS),
  36       $(call warn_eval,$(1)/$(bd),t,T,$(1)/$(bd)/$(target): $(call dep/$(target),$(1)/$(bd)) $($(1)/$(bd)/$(target)) $($(1)//$(target)))
  37                 @$$(MAKE) -j1 -C $(1)/$(bd) $(target)
  38
  39       # legacy targets
  40       $(call warn_eval,$(1)/$(bd),l,T,$(1)/$(bd)-$(target): $(1)/$(bd)/$(target))
  41         )
  42   )
  43   $(foreach target,$(SUBTARGETS),
  44     $(call warn_eval,$(1),t,T,$(1)/$(target): $($(1)/) $(foreach bd,$($(1)/builddirs),$(1)/$(bd)/$(target)))
  45   )
  46 endef
  47
  48 # Parameters: <subdir> <name>
  49 define stampfile
  50   $(1)/stamp:=$(STAGING_DIR)/stampfiles/.$(2)_installed
  51   $(call rdep,$(1),$$($(1)/stamp))
  52
  53   $$($(1)/stamp):
  54         @$(MAKE) $(1)/install
  55         @mkdir -p $$$$(dirname $$($(1)/stamp))
  56         @touch $$($(1)/stamp)
  57   .PRECIOUS: $$($(1)/stamp) # work around a make bug
  58
  59   $(1)//clean:=$(1)/stamp/clean
  60   $(1)/stamp/clean: FORCE
  61         @rm -f $$($(1)/stamp)
  62
  63 endef