xref: /linux/scripts/Makefile.clean (revision 63307d015b91e626c97bb82e88054af3d0b74643) 
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		   $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \
42		   $(hostlibs-y) $(hostlibs-m) $(hostlibs-) \
43		   $(hostcxxlibs-y) $(hostcxxlibs-m)
44
45__clean-files   := $(filter-out $(no-clean-files), $(__clean-files))
46
47# clean-files is given relative to the current directory, unless it
48# starts with $(objtree)/ (which means "./", so do not add "./" unless
49# you want to delete a file from the toplevel object directory).
50
51__clean-files   := $(wildcard                                               \
52		   $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(__clean-files))) \
53		   $(filter $(objtree)/%, $(__clean-files)))
54
55# same as clean-files
56
57__clean-dirs    := $(wildcard                                               \
58		   $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(clean-dirs)))    \
59		   $(filter $(objtree)/%, $(clean-dirs)))
60
61# ==========================================================================
62
63quiet_cmd_clean    = CLEAN   $(obj)
64      cmd_clean    = rm -f $(__clean-files)
65quiet_cmd_cleandir = CLEAN   $(__clean-dirs)
66      cmd_cleandir = rm -rf $(__clean-dirs)
67
68
69__clean: $(subdir-ymn)
70ifneq ($(strip $(__clean-files)),)
71	+$(call cmd,clean)
72endif
73ifneq ($(strip $(__clean-dirs)),)
74	+$(call cmd,cleandir)
75endif
76	@:
77
78
79# ===========================================================================
80# Generic stuff
81# ===========================================================================
82
83# Descending
84# ---------------------------------------------------------------------------
85
86PHONY += $(subdir-ymn)
87$(subdir-ymn):
88	$(Q)$(MAKE) $(clean)=$@
89
90.PHONY: $(PHONY)
91