xref: /linux/scripts/Makefile.clean (revision f3d9478b2ce468c3115b02ecae7e975990697f15) 
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 releative to the current
41# directory
42
43__clean-files	:= $(extra-y) $(EXTRA_TARGETS) $(always) \
44		   $(targets) $(clean-files)             \
45		   $(host-progs)                         \
46		   $(hostprogs-y) $(hostprogs-m) $(hostprogs-)
47
48# as clean-files is given relative to the current directory, this adds
49# a $(obj) prefix, except for absolute paths
50
51__clean-files   := $(wildcard                                               \
52                   $(addprefix $(obj)/, $(filter-out /%, $(__clean-files))) \
53		   $(filter /%, $(__clean-files)))
54
55# as clean-dirs is given relative to the current directory, this adds
56# a $(obj) prefix, except for absolute paths
57
58__clean-dirs    := $(wildcard                                               \
59                   $(addprefix $(obj)/, $(filter-out /%, $(clean-dirs)))    \
60		   $(filter /%, $(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
77ifneq ($(strip $(clean-rule)),)
78	+$(clean-rule)
79endif
80	@:
81
82
83# ===========================================================================
84# Generic stuff
85# ===========================================================================
86
87# Descending
88# ---------------------------------------------------------------------------
89
90PHONY += $(subdir-ymn)
91$(subdir-ymn):
92	$(Q)$(MAKE) $(clean)=$@
93
94# If quiet is set, only print short version of command
95
96cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
97
98
99# Declare the contents of the .PHONY variable as phony.  We keep that
100# information in a variable se we can use it in if_changed and friends.
101
102.PHONY: $(PHONY)
103