linux/scripts/Makefile.clean
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   1# SPDX-License-Identifier: GPL-2.0
   2# ==========================================================================
   3# Cleaning up
   4# ==========================================================================
   5
   6src := $(obj)
   7
   8PHONY := __clean
   9__clean:
  10
  11include $(srctree)/scripts/Kbuild.include
  12
  13# The filename Kbuild has precedence over Makefile
  14kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
  15include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
  16
  17# Figure out what we need to build from the various variables
  18# ==========================================================================
  19
  20subdir-ymn := $(sort $(subdir-y) $(subdir-m) $(subdir-) \
  21                $(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m) $(obj-))))
  22
  23# Add subdir path
  24
  25subdir-ymn      := $(addprefix $(obj)/,$(subdir-ymn))
  26
  27# build a list of files to remove, usually relative to the current
  28# directory
  29
  30__clean-files   := \
  31        $(clean-files) $(targets) $(hostprogs) $(userprogs) \
  32        $(extra-y) $(extra-m) $(extra-) \
  33        $(always-y) $(always-m) $(always-) \
  34        $(hostprogs-always-y) $(hostprogs-always-m) $(hostprogs-always-) \
  35        $(userprogs-always-y) $(userprogs-always-m) $(userprogs-always-)
  36
  37__clean-files   := $(filter-out $(no-clean-files), $(__clean-files))
  38
  39# clean-files is given relative to the current directory, unless it
  40# starts with $(objtree)/ (which means "./", so do not add "./" unless
  41# you want to delete a file from the toplevel object directory).
  42
  43__clean-files   := $(wildcard                                               \
  44                   $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(__clean-files))) \
  45                   $(filter $(objtree)/%, $(__clean-files)))
  46
  47# ==========================================================================
  48
  49quiet_cmd_clean = CLEAN   $(obj)
  50      cmd_clean = rm -rf $(__clean-files)
  51
  52__clean: $(subdir-ymn)
  53ifneq ($(strip $(__clean-files)),)
  54        $(call cmd,clean)
  55endif
  56        @:
  57
  58
  59# ===========================================================================
  60# Generic stuff
  61# ===========================================================================
  62
  63# Descending
  64# ---------------------------------------------------------------------------
  65
  66PHONY += $(subdir-ymn)
  67$(subdir-ymn):
  68        $(Q)$(MAKE) $(clean)=$@
  69
  70.PHONY: $(PHONY)
  71