linux/scripts/Makefile.clean
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   1# ==========================================================================
   2# Cleaning up
   3# ==========================================================================
   4
   5src := $(obj)
   6
   7PHONY := __clean
   8__clean:
   9
  10# Shorthand for $(Q)$(MAKE) scripts/Makefile.clean obj=dir
  11# Usage:
  12# $(Q)$(MAKE) $(clean)=dir
  13clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  14
  15# The filename Kbuild has precedence over Makefile
  16kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
  17include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
  18
  19# Figure out what we need to build from the various variables
  20# ==========================================================================
  21
  22__subdir-y      := $(patsubst %/,%,$(filter %/, $(obj-y)))
  23subdir-y        += $(__subdir-y)
  24__subdir-m      := $(patsubst %/,%,$(filter %/, $(obj-m)))
  25subdir-m        += $(__subdir-m)
  26__subdir-n      := $(patsubst %/,%,$(filter %/, $(obj-n)))
  27subdir-n        += $(__subdir-n)
  28__subdir-       := $(patsubst %/,%,$(filter %/, $(obj-)))
  29subdir-         += $(__subdir-)
  30
  31# Subdirectories we need to descend into
  32
  33subdir-ym       := $(sort $(subdir-y) $(subdir-m))
  34subdir-ymn      := $(sort $(subdir-ym) $(subdir-n) $(subdir-))
  35
  36# Add subdir path
  37
  38subdir-ymn      := $(addprefix $(obj)/,$(subdir-ymn))
  39
  40# build a list of files to remove, usually relative to the current
  41# directory
  42
  43__clean-files   := $(extra-y) $(always)                  \
  44                   $(targets) $(clean-files)             \
  45                   $(host-progs)                         \
  46                   $(hostprogs-y) $(hostprogs-m) $(hostprogs-)
  47
  48__clean-files   := $(filter-out $(no-clean-files), $(__clean-files))
  49
  50# as clean-files is given relative to the current directory, this adds
  51# a $(obj) prefix, except for absolute paths
  52
  53__clean-files   := $(wildcard                                               \
  54                   $(addprefix $(obj)/, $(filter-out /%, $(__clean-files))) \
  55                   $(filter /%, $(__clean-files)))
  56
  57# as clean-dirs is given relative to the current directory, this adds
  58# a $(obj) prefix, except for absolute paths
  59
  60__clean-dirs    := $(wildcard                                               \
  61                   $(addprefix $(obj)/, $(filter-out /%, $(clean-dirs)))    \
  62                   $(filter /%, $(clean-dirs)))
  63
  64# ==========================================================================
  65
  66quiet_cmd_clean    = CLEAN   $(obj)
  67      cmd_clean    = rm -f $(__clean-files)
  68quiet_cmd_cleandir = CLEAN   $(__clean-dirs)
  69      cmd_cleandir = rm -rf $(__clean-dirs)
  70
  71
  72__clean: $(subdir-ymn)
  73ifneq ($(strip $(__clean-files)),)
  74        +$(call cmd,clean)
  75endif
  76ifneq ($(strip $(__clean-dirs)),)
  77        +$(call cmd,cleandir)
  78endif
  79ifneq ($(strip $(clean-rule)),)
  80        +$(clean-rule)
  81endif
  82        @:
  83
  84
  85# ===========================================================================
  86# Generic stuff
  87# ===========================================================================
  88
  89# Descending
  90# ---------------------------------------------------------------------------
  91
  92PHONY += $(subdir-ymn)
  93$(subdir-ymn):
  94        $(Q)$(MAKE) $(clean)=$@
  95
  96# If quiet is set, only print short version of command
  97
  98cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
  99
 100
 101# Declare the contents of the .PHONY variable as phony.  We keep that
 102# information in a variable se we can use it in if_changed and friends.
 103
 104.PHONY: $(PHONY)
 105
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