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

# Cleaning up

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

src := $(obj)

PHONY := __clean

__clean:

# Shorthand for $(Q)$(MAKE) scripts/Makefile.clean obj=dir

# Usage:

# $(Q)$(MAKE) $(clean)=dir

clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj

# The filename Kbuild has precedence over Makefile

kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))

include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/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))

# build a list of files to remove, usually relative to the current

# directory

__clean-files := $(extra-y) $(always) \

$(targets) $(clean-files) \

$(host-progs) \

$(hostprogs-y) $(hostprogs-m) $(hostprogs-)

# as clean-files is given relative to the current directory, this adds

# a $(obj) prefix, except for absolute paths

__clean-files := $(wildcard \

$(addprefix $(obj)/, $(filter-out /%, $(__clean-files))) \

$(filter /%, $(__clean-files)))

# as clean-dirs is given relative to the current directory, this adds

# a $(obj) prefix, except for absolute paths

__clean-dirs := $(wildcard \

$(addprefix $(obj)/, $(filter-out /%, $(clean-dirs))) \

$(filter /%, $(clean-dirs)))

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

quiet_cmd_clean = CLEAN $(obj)

cmd_clean = rm -f $(__clean-files)

quiet_cmd_cleandir = CLEAN $(__clean-dirs)

cmd_cleandir = rm -rf $(__clean-dirs)

__clean: $(subdir-ymn)

ifneq ($(strip $(__clean-files)),)

+$(call cmd,clean)

endif

ifneq ($(strip $(__clean-dirs)),)

+$(call cmd,cleandir)

endif

ifneq ($(strip $(clean-rule)),)

+$(clean-rule)

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))

# Declare the contents of the .PHONY variable as phony. We keep that

# information in a variable se we can use it in if_changed and friends.

.PHONY: $(PHONY)