process-subdir.mk

subdir-y :=

# SRCDIR points to the root directory (where kmake.mk is) if including
# kmake.mk in a build-directory makefile (not using O=$builddir).
# srcdir points to the directory of each subdir.mk and is relative
# SRCDIR.
include $(SRCDIR)$(srcdir)subdir.mk

# remember custom vars for installation
prog_vars    := $(sort $(prog_vars) $(extra-progs))
lib_vars     := $(sort $(lib_vars) $(extra-libs))
data_vars    := $(sort $(data_vars) $(extra-data))
test_vars    := $(sort $(test_vars) $(extra-tests))
gen_vars     := $(sort $(gen_vars) $(extra-gen))
flag_names   := $(sort $(flag_names) $(extra-flags))
aflag_names  := $(sort $(aflag_names) $(extra-append-flags))
target_names := $(sort $(target_names) $(extra-targets))

# There is only a single tests variable, and the programs need not be installed
$(foreach v,$(prog_vars) $(lib_vars) $(data_vars) $(gen_vars) $(test_vars) clean distclean dist nodist submake postmake,\
	$(if $($(v)-y),$(eval all_$(v) += $(addprefix $(srcdir),$($(v)-y)))) \
	$(foreach bin,$($(v)-y),$(eval $(call varname,$(bin))-origin := $(srcdir)subdir.mk)))
$(foreach v,$(prog_vars) $(lib_vars) $(data_vars),\
	$(if $($(v)-dir),,$(error Must specify $(v)-dir in $(srcdir)subdir.mk)))

# prepends CFLAGS-y to $(bin)-CFLAGS-y (and friends)
$(foreach flag,$(flag_names),\
	$(foreach v,$(prog_vars) $(lib_vars) $(gen_vars) $(test_vars),\
		$(foreach bin,$($(v)-y),$(call prepend_flags,$(flag),$(srcdir),$(bin)))))

# Like above, except DEPS and LIBS should be appended
# per-directory -l options should occur last (as LIBS usually holds
# system libraries). Likewise, DEPS must occur before LIBS.
$(foreach flag,$(aflag_names),\
	$(foreach v,$(prog_vars) $(lib_vars) $(gen_vars) $(test_vars),\
		$(foreach bin,$($(v)-y),$(call append_flags,$(flag),$(srcdir),$(bin)))))

# Setup up for flag inheritance so that subdirectory subdir.mk
# have valid subdir-$(srcdir)-CFLAGS-y etc.
$(foreach dir,$(addprefix $(srcdir),$(subdir-y)),\
	$(foreach flag,$(flag_names),$(eval $(call inherit_flags,$(flag),$(srcdir),$(dir)))))
$(foreach dir,$(addprefix $(srcdir),$(subdir-y)),\
	$(foreach flag,$(aflag_names),$(eval $(call inherit_aflags,$(flag),$(srcdir),$(dir)))))

# each dir in subdir-y must end with a slash
$(foreach var,subdir-y INCLUDES-y,\
	$(and $(filter-out %/,$($(var))),$(error  $(var) directories must end with a slash ($(srcdir)subdir.mk: $(filter-out %/,$($(var)))))))

$(eval $(call clearvars))

$(if $(filter . ./,$(subdir-y)),$(error . in subdir-y would cause recursion))

$(foreach dir,$(addprefix $(srcdir),$(subdir-y)),$(eval $(call inc_subdir,$(dir))))