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 ($(DEBUG),all)
   8   build_debug:=dlt
   9 else
  10   build_debug:=$(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 SUBTARGETS:=clean download prepare compile install update refresh prereq
  27
  28 # Parameters: <subdir>
  29 define subdir
  30   $(call warn,$(1),d,D $(1))
  31   $(foreach bd,$($(1)/builddirs),
  32     $(call warn,$(1),d,BD $(1)/$(bd))
  33     $(foreach target,$(SUBTARGETS),
  34       $(call warn_eval,$(1)/$(bd),t,T,$(1)/$(bd)/$(target): $($(1)/$(bd)/$(target)) $(call $(1)//$(target),$(1)/$(bd)))
  35                 @$$(MAKE) -j1 -C $(1)/$(bd) $(target)
  36
  37       # legacy targets
  38       $(call warn_eval,$(1)/$(bd),l,T,$(1)/$(bd)-$(target): $(1)/$(bd)/$(target))
  39         )
  40   )
  41   $(foreach target,$(SUBTARGETS),
  42     $(call warn_eval,$(1),t,T,$(1)/$(target): $($(1)/) $(foreach bd,$(if $($(1)/builddirs-$(target)),$($(1)/builddirs-$(target)),$($(1)/builddirs)),$(1)/$(bd)/$(target)))
  43   )
  44 endef
  45
  46 # Parameters: <subdir> <name>
  47 define stampfile
  48   $(1)/stamp:=$(STAGING_DIR)/stampfiles/.$(2)_installed
  49   $(call rdep,$(1),$$($(1)/stamp))
  50
  51   $$($(1)/stamp):
  52         @$(MAKE) $(1)/install
  53         @mkdir -p $$$$(dirname $$($(1)/stamp))
  54         @touch $$($(1)/stamp)
  55   .PRECIOUS: $$($(1)/stamp) # work around a make bug
  56
  57   $(1)//clean:=$(1)/stamp/clean
  58   $(1)/stamp/clean: FORCE
  59         @rm -f $$($(1)/stamp)
  60
  61 endef