# ==========================================================================
# Cleaning up
# ==========================================================================

src := $(obj)

.PHONY: __clean
__clean:

include $(obj)/Makefile

# Figure out what we need to build from the various variables
# ==========================================================================

__subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
subdir-y	+= $(__subdir-y)
__subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
subdir-m	+= $(__subdir-m)
__subdir-n	:= $(patsubst %/,%,$(filter %/, $(obj-n)))
subdir-n	+= $(__subdir-n)
__subdir-	:= $(patsubst %/,%,$(filter %/, $(obj-)))
subdir-		+= $(__subdir-)

# Subdirectories we need to descend into

subdir-ym	:= $(sort $(subdir-y) $(subdir-m))
subdir-ymn      := $(sort $(subdir-ym) $(subdir-n) $(subdir-))

# Add subdir path

subdir-ymn	:= $(addprefix $(obj)/,$(subdir-ymn))
__clean-files	:= $(wildcard $(addprefix $(obj)/, \
		   $(extra-y) $(EXTRA_TARGETS) $(always) $(host-progs) \
		   $(targets) $(clean-files)))

# ==========================================================================

quiet_cmd_clean = CLEAN   $(obj)
      cmd_clean = rm -f $(__clean-files); $(clean-rule)

__clean: $(subdir-ymn)
ifneq ($(strip $(__clean-files) $(clean-rule)),)
	+$(call cmd,clean)
else
	@:
endif

# ===========================================================================
# Generic stuff
# ===========================================================================

# Descending
# ---------------------------------------------------------------------------

.PHONY: $(subdir-ymn)
$(subdir-ymn):
	$(Q)$(MAKE) $(clean)=$@

# If quiet is set, only print short version of command

cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))

# Shorthand for $(Q)$(MAKE) scripts/Makefile.clean obj=dir
# Usage:
# $(Q)$(MAKE) $(clean)=dir
clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj