LXR linux/scripts/Makefile.clean

   1# SPDX-License-Identifier: GPL-2.0
   2# ==========================================================================
   3# Cleaning up
   4# ==========================================================================
   5
   6src := $(obj)
   7
   8PHONY := __clean
   9__clean:
  10
  11include 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
  20__subdir-y      := $(patsubst %/,%,$(filter %/, $(obj-y)))
  21subdir-y        += $(__subdir-y)
  22__subdir-m      := $(patsubst %/,%,$(filter %/, $(obj-m)))
  23subdir-m        += $(__subdir-m)
  24__subdir-       := $(patsubst %/,%,$(filter %/, $(obj-)))
  25subdir-         += $(__subdir-)
  26
  27# Subdirectories we need to descend into
  28
  29subdir-ym       := $(sort $(subdir-y) $(subdir-m))
  30subdir-ymn      := $(sort $(subdir-ym) $(subdir-))
  31
  32# Add subdir path
  33
  34subdir-ymn      := $(addprefix $(obj)/,$(subdir-ymn))
  35
  36# build a list of files to remove, usually relative to the current
  37# directory
  38
  39__clean-files   := $(extra-y) $(extra-m) $(extra-)       \
  40                   $(always) $(targets) $(clean-files)   \
  41                   $(host-progs)                         \
  42                   $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \
  43                   $(hostlibs-y) $(hostlibs-m) $(hostlibs-) \
  44                   $(hostcxxlibs-y) $(hostcxxlibs-m)
  45
  46__clean-files   := $(filter-out $(no-clean-files), $(__clean-files))
  47
  48# clean-files is given relative to the current directory, unless it
  49# starts with $(objtree)/ (which means "./", so do not add "./" unless
  50# you want to delete a file from the toplevel object directory).
  51
  52__clean-files   := $(wildcard                                               \
  53                   $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(__clean-files))) \
  54                   $(filter $(objtree)/%, $(__clean-files)))
  55
  56# same as clean-files
  57
  58__clean-dirs    := $(wildcard                                               \
  59                   $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(clean-dirs)))    \
  60                   $(filter $(objtree)/%, $(clean-dirs)))
  61
  62# ==========================================================================
  63
  64quiet_cmd_clean    = CLEAN   $(obj)
  65      cmd_clean    = rm -f $(__clean-files)
  66quiet_cmd_cleandir = CLEAN   $(__clean-dirs)
  67      cmd_cleandir = rm -rf $(__clean-dirs)
  68
  69
  70__clean: $(subdir-ymn)
  71ifneq ($(strip $(__clean-files)),)
  72        +$(call cmd,clean)
  73endif
  74ifneq ($(strip $(__clean-dirs)),)
  75        +$(call cmd,cleandir)
  76endif
  77        @:
  78
  79
  80# ===========================================================================
  81# Generic stuff
  82# ===========================================================================
  83
  84# Descending
  85# ---------------------------------------------------------------------------
  86
  87PHONY += $(subdir-ymn)
  88$(subdir-ymn):
  89        $(Q)$(MAKE) $(clean)=$@
  90
  91# Declare the contents of the .PHONY variable as phony.  We keep that
  92# information in a variable se we can use it in if_changed and friends.
  93
  94.PHONY: $(PHONY)
  95