xref: /linux/scripts/Makefile.clean (revision bb9707077b4ee5f77bc9939b057ff8a0d410296f) 
1# ==========================================================================
2# Cleaning up
3# ==========================================================================
4
5src := $(obj)
6
7PHONY := __clean
8__clean:
9
10include scripts/Kbuild.include
11
12# The filename Kbuild has precedence over Makefile
13kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
14include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
15
16# Figure out what we need to build from the various variables
17# ==========================================================================
18
19__subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
20subdir-y	+= $(__subdir-y)
21__subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
22subdir-m	+= $(__subdir-m)
23__subdir-	:= $(patsubst %/,%,$(filter %/, $(obj-)))
24subdir-		+= $(__subdir-)
25
26# Subdirectories we need to descend into
27
28subdir-ym	:= $(sort $(subdir-y) $(subdir-m))
29subdir-ymn      := $(sort $(subdir-ym) $(subdir-))
30
31# Add subdir path
32
33subdir-ymn	:= $(addprefix $(obj)/,$(subdir-ymn))
34
35# build a list of files to remove, usually relative to the current
36# directory
37
38__clean-files	:= $(extra-y) $(extra-m) $(extra-)       \
39		   $(always) $(targets) $(clean-files)   \
40		   $(host-progs)                         \
41		   $(hostprogs-y) $(hostprogs-m) $(hostprogs-)
42
43__clean-files   := $(filter-out $(no-clean-files), $(__clean-files))
44
45# clean-files is given relative to the current directory, unless it
46# starts with $(objtree)/ (which means "./", so do not add "./" unless
47# you want to delete a file from the toplevel object directory).
48
49__clean-files   := $(wildcard                                               \
50		   $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(__clean-files))) \
51		   $(filter $(objtree)/%, $(__clean-files)))
52
53# same as clean-files
54
55__clean-dirs    := $(wildcard                                               \
56		   $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(clean-dirs)))    \
57		   $(filter $(objtree)/%, $(clean-dirs)))
58
59# ==========================================================================
60
61quiet_cmd_clean    = CLEAN   $(obj)
62      cmd_clean    = rm -f $(__clean-files)
63quiet_cmd_cleandir = CLEAN   $(__clean-dirs)
64      cmd_cleandir = rm -rf $(__clean-dirs)
65
66
67__clean: $(subdir-ymn)
68ifneq ($(strip $(__clean-files)),)
69	+$(call cmd,clean)
70endif
71ifneq ($(strip $(__clean-dirs)),)
72	+$(call cmd,cleandir)
73endif
74	@:
75
76
77# ===========================================================================
78# Generic stuff
79# ===========================================================================
80
81# Descending
82# ---------------------------------------------------------------------------
83
84PHONY += $(subdir-ymn)
85$(subdir-ymn):
86	$(Q)$(MAKE) $(clean)=$@
87
88# Declare the contents of the .PHONY variable as phony.  We keep that
89# information in a variable se we can use it in if_changed and friends.
90
91.PHONY: $(PHONY)
92