# ==========================================================================# Cleaning up# ========================================================================== src := $(obj) PHONY := __clean__clean: include scripts/Kbuild.include # The filename Kbuild has precedence over Makefilekbuild-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-	:= $(patsubst %/,%,$(filter %/, $(obj-)))subdir-		+= $(__subdir-) # Subdirectories we need to descend into subdir-ym	:= $(sort $(subdir-y) $(subdir-m))subdir-ymn      := $(sort $(subdir-ym) $(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) $(extra-m) $(extra-)       \		   $(always) $(targets) $(clean-files)   \		   $(host-progs)                         \		   $(hostprogs-y) $(hostprogs-m) $(hostprogs-) __clean-files   := $(filter-out $(no-clean-files), $(__clean-files)) # clean-files is given relative to the current directory, unless it# starts with $(objtree)/ (which means "./", so do not add "./" unless# you want to delete a file from the toplevel object directory). __clean-files   := $(wildcard                                               \		   $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(__clean-files))) \		   $(filter $(objtree)/%, $(__clean-files))) # same as clean-files __clean-dirs    := $(wildcard                                               \		   $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(clean-dirs)))    \		   $(filter $(objtree)/%, $(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)endififneq ($(strip $(__clean-dirs)),)	+$(call cmd,cleandir)endififneq ($(strip $(clean-rule)),)	+$(clean-rule)endif	@:  # ===========================================================================# Generic stuff# =========================================================================== # Descending# --------------------------------------------------------------------------- PHONY += $(subdir-ymn)$(subdir-ymn):	$(Q)$(MAKE) $(clean)=$@ # 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)