xref: /openbmc/linux/Makefile (revision d6d5df1db6e9d7f8f76d2911707f7d5877251b02)
1 b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2 bfeffd15SLinus TorvaldsVERSION = 5
3 54ecb8f7SLinus TorvaldsPATCHLEVEL = 4
4 55922c9dSLinus TorvaldsSUBLEVEL = 0
5 *d6d5df1dSLinus TorvaldsEXTRAVERSION = -rc5
6 *d6d5df1dSLinus TorvaldsNAME = Kleptomaniac Octopus
7 1da177e4SLinus Torvalds
8 1da177e4SLinus Torvalds# *DOCUMENTATION*
9 1da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
10 1da177e4SLinus Torvalds# More info can be located in ./README
11 1da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
12 1da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
13 1da177e4SLinus Torvalds
14 ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
15 ba634eceSMasahiro YamadaPHONY := _all
16 ba634eceSMasahiro Yamada_all:
17 ba634eceSMasahiro Yamada
18 1da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
19 1da177e4SLinus Torvalds# to get the ordering right.
20 1da177e4SLinus Torvalds#
21 1da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
22 1da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
23 1da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
24 f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
25 1da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
26 1da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
27 1da177e4SLinus Torvalds# is now up to date.
28 1da177e4SLinus Torvalds#
29 1da177e4SLinus Torvalds# The only cases where we need to modify files which have global
30 1da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
31 1da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
32 1da177e4SLinus Torvalds# prepare rule.
33 1da177e4SLinus Torvalds
34 221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
35 3812b8c5SMasahiro Yamada
36 3812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
37 3812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
38 3812b8c5SMasahiro YamadaMAKEFLAGS += -rR
39 3812b8c5SMasahiro Yamada
40 3812b8c5SMasahiro Yamada# Avoid funny character set dependencies
41 3812b8c5SMasahiro Yamadaunexport LC_ALL
42 3812b8c5SMasahiro YamadaLC_COLLATE=C
43 3812b8c5SMasahiro YamadaLC_NUMERIC=C
44 3812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
45 3812b8c5SMasahiro Yamada
46 3812b8c5SMasahiro Yamada# Avoid interference with shell env settings
47 3812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
48 3812b8c5SMasahiro Yamada
49 066b7ed9SMichal Marek# Beautify output
50 066b7ed9SMichal Marek# ---------------------------------------------------------------------------
51 066b7ed9SMichal Marek#
52 066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
53 066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
54 066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
55 066b7ed9SMichal Marek#
56 066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
57 066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
58 066b7ed9SMichal Marek#
59 066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
60 066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
61 066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
62 066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
63 066b7ed9SMichal Marek#
64 066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
65 066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
66 066b7ed9SMichal Marek#
67 066b7ed9SMichal Marek#	$(Q)ln $@ :<
68 066b7ed9SMichal Marek#
69 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
70 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
71 066b7ed9SMichal Marek#
72 1da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
73 1da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
74 1da177e4SLinus Torvalds
75 1da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
76 1da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
77 1da177e4SLinus Torvaldsendif
78 1da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
79 1da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
80 1da177e4SLinus Torvaldsendif
81 1da177e4SLinus Torvalds
82 066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
83 066b7ed9SMichal Marek  quiet =
84 066b7ed9SMichal Marek  Q =
85 066b7ed9SMichal Marekelse
86 066b7ed9SMichal Marek  quiet=quiet_
87 066b7ed9SMichal Marek  Q = @
88 066b7ed9SMichal Marekendif
89 066b7ed9SMichal Marek
90 066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
91 066b7ed9SMichal Marek# commands
92 066b7ed9SMichal Marek
93 6f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
94 066b7ed9SMichal Marek  quiet=silent_
95 066b7ed9SMichal Marekendif
96 066b7ed9SMichal Marek
97 066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
98 066b7ed9SMichal Marek
99 25b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
100 25b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
101 25b146c5SMasahiro Yamada#
102 25b146c5SMasahiro Yamada# For example, you can do this:
103 25b146c5SMasahiro Yamada#
104 25b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
105 25b146c5SMasahiro Yamada#
106 25b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
107 25b146c5SMasahiro Yamada# two syntaxes to specify it.
108 25b146c5SMasahiro Yamada#
109 1da177e4SLinus Torvalds# 1) O=
110 1da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
111 1da177e4SLinus Torvalds#
112 1da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
113 25b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
114 25b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
115 1da177e4SLinus Torvalds#
116 1da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
117 1da177e4SLinus Torvalds# variable.
118 1da177e4SLinus Torvalds
119 25b146c5SMasahiro Yamada# Do we want to change the working directory?
120 1da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
121 1da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
122 1da177e4SLinus Torvaldsendif
123 1da177e4SLinus Torvalds
124 25b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
125 25b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
126 25b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
127 25b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
128 25b146c5SMasahiro Yamada$(if $(abs_objtree),, \
129 25b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
130 25b146c5SMasahiro Yamada
131 25b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
132 25b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
133 25b146c5SMasahiro Yamadaelse
134 25b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
135 25b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
136 25b146c5SMasahiro Yamada
137 25b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
138 25b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
139 25b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
140 25b146c5SMasahiro Yamadaelse
141 25b146c5SMasahiro Yamadaneed-sub-make := 1
142 51193b76SRobert Jarzmikendif
143 51193b76SRobert Jarzmik
144 25b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
145 1da177e4SLinus Torvalds
146 25b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
147 25b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
148 25b146c5SMasahiro Yamadaendif
149 25b146c5SMasahiro Yamada
150 25b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
151 80463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
152 80463f1bSMasahiro Yamada#
153 80463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
154 25b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
155 25b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
156 688931a5SMasahiro Yamadaneed-sub-make := 1
157 25b146c5SMasahiro Yamadaendif
158 3812b8c5SMasahiro Yamada
159 688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
160 688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
161 688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
162 688931a5SMasahiro Yamadaneed-sub-make := 1
163 688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
164 688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ;
165 688931a5SMasahiro Yamadaendif
166 688931a5SMasahiro Yamada
167 25b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
168 221cc2d2SMasahiro Yamadaexport sub_make_done := 1
169 221cc2d2SMasahiro Yamada
170 688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
171 688931a5SMasahiro Yamada
172 0b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
173 0b35786dSMilton Miller
174 0209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
175 16f89098SCharles Keepax	@:
176 0b35786dSMilton Miller
177 c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
178 2e8d696bSMasahiro Yamadasub-make:
179 25b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
180 1da177e4SLinus Torvalds
181 688931a5SMasahiro Yamadaendif # need-sub-make
182 221cc2d2SMasahiro Yamadaendif # sub_make_done
183 688931a5SMasahiro Yamada
184 1da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
185 688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
186 1da177e4SLinus Torvalds
187 7ff52571SMasahiro Yamada# Do not print "Entering directory ...",
188 7ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
189 7ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
190 7ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
191 7ff52571SMasahiro Yamada
192 aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
193 aa55c8e2SMasahiro Yamada# C compilation.
194 aa55c8e2SMasahiro Yamada#
195 aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
196 aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
197 aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
198 aa55c8e2SMasahiro Yamada#
199 036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
200 036db11cSCao jin# including where to get the "sparse" utility.
201 aa55c8e2SMasahiro Yamada
202 aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
203 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
204 aa55c8e2SMasahiro Yamadaendif
205 aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
206 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
207 aa55c8e2SMasahiro Yamadaendif
208 aa55c8e2SMasahiro Yamada
209 7e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
210 7e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
211 aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
212 aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
213 aa55c8e2SMasahiro Yamadaendif
214 aa55c8e2SMasahiro Yamada
215 051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD
216 051f278eSMasahiro Yamada
217 394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
218 394053f4SMasahiro Yamada
219 25b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
220 9da0763bSMichal Marek        # building in the source tree
221 9da0763bSMichal Marek        srctree := .
222 051f278eSMasahiro Yamada	building_out_of_srctree :=
223 9da0763bSMichal Marekelse
224 25b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
225 9da0763bSMichal Marek                # building in a subdirectory of the source tree
226 9da0763bSMichal Marek                srctree := ..
227 9da0763bSMichal Marek        else
228 25b146c5SMasahiro Yamada                srctree := $(abs_srctree)
229 9da0763bSMichal Marek        endif
230 051f278eSMasahiro Yamada	building_out_of_srctree := 1
231 9da0763bSMichal Marekendif
232 2c1f4f12SMasahiro Yamada
233 95fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
234 95fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
235 95fd3f87SMasahiro Yamadaendif
236 2c1f4f12SMasahiro Yamada
237 7e1c0477SMichal Marekobjtree		:= .
238 6b12de69SMasahiro YamadaVPATH		:= $(srctree)
239 1da177e4SLinus Torvalds
240 051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
241 1da177e4SLinus Torvalds
242 2c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
243 2c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
244 2c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
245 2c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
246 2c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
247 2c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
248 2c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
249 2c1f4f12SMasahiro Yamada
250 2c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
251 2c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
252 2c1f4f12SMasahiro Yamada
253 22340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
254 22340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
255 2c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
256 59b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
257 63e31a67SMasahiro Yamada			 %asm-generic kernelversion %src-pkg
258 a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \
259 a29d4d8cSMasahiro Yamada			   kernelrelease
260 394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
261 2c1f4f12SMasahiro Yamada
262 2042b548SMasahiro Yamadaconfig-build	:=
263 2042b548SMasahiro Yamadamixed-build	:=
264 2042b548SMasahiro Yamadaneed-config	:= 1
265 d7942413SMasahiro Yamadamay-sync-config	:= 1
266 394053f4SMasahiro Yamadasingle-build	:=
267 2c1f4f12SMasahiro Yamada
268 2c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
269 2c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
270 2042b548SMasahiro Yamada		need-config :=
271 2c1f4f12SMasahiro Yamada	endif
272 2c1f4f12SMasahiro Yamadaendif
273 2c1f4f12SMasahiro Yamada
274 d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
275 d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
276 2042b548SMasahiro Yamada		may-sync-config :=
277 d7942413SMasahiro Yamada	endif
278 d7942413SMasahiro Yamadaendif
279 d7942413SMasahiro Yamada
280 d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
281 2042b548SMasahiro Yamada	may-sync-config :=
282 d7942413SMasahiro Yamadaendif
283 d7942413SMasahiro Yamada
284 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
285 2c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
286 2042b548SMasahiro Yamada		config-build := 1
287 2c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
288 2042b548SMasahiro Yamada			mixed-build := 1
289 2c1f4f12SMasahiro Yamada                endif
290 2c1f4f12SMasahiro Yamada        endif
291 2c1f4f12SMasahiro Yamadaendif
292 22340a06SMasahiro Yamada
293 394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
294 394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
295 394053f4SMasahiro Yamada	single-build := 1
296 394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
297 394053f4SMasahiro Yamada		mixed-build := 1
298 394053f4SMasahiro Yamada	endif
299 394053f4SMasahiro Yamadaendif
300 394053f4SMasahiro Yamada
301 22340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
302 22340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
303 22340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
304 2042b548SMasahiro Yamada		mixed-build := 1
305 22340a06SMasahiro Yamada        endif
306 22340a06SMasahiro Yamadaendif
307 22340a06SMasahiro Yamada
308 2c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
309 2c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
310 2c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
311 2042b548SMasahiro Yamada		mixed-build := 1
312 2c1f4f12SMasahiro Yamada        endif
313 2c1f4f12SMasahiro Yamadaendif
314 2c1f4f12SMasahiro Yamada
315 2042b548SMasahiro Yamadaifdef mixed-build
316 2c1f4f12SMasahiro Yamada# ===========================================================================
317 2c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
318 2c1f4f12SMasahiro Yamada# Handle them one by one.
319 2c1f4f12SMasahiro Yamada
320 2c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
321 2c1f4f12SMasahiro Yamada
322 2c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
323 2c1f4f12SMasahiro Yamada	@:
324 2c1f4f12SMasahiro Yamada
325 2c1f4f12SMasahiro Yamada__build_one_by_one:
326 2c1f4f12SMasahiro Yamada	$(Q)set -e; \
327 2c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
328 2c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
329 2c1f4f12SMasahiro Yamada	done
330 2c1f4f12SMasahiro Yamada
331 2042b548SMasahiro Yamadaelse # !mixed-build
332 2c1f4f12SMasahiro Yamada
333 2c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
334 2c1f4f12SMasahiro Yamada
335 2c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
336 2c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
337 2c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
338 2c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
339 2c1f4f12SMasahiro Yamada
340 b2d35fa5SAnders Roxellinclude scripts/subarch.include
341 1da177e4SLinus Torvalds
342 1da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
343 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
344 1da177e4SLinus Torvalds#
345 1da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
346 1da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
347 1da177e4SLinus Torvalds# ARCH can be set during invocation of make:
348 1da177e4SLinus Torvalds# make ARCH=ia64
349 1da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
350 1da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
351 1da177e4SLinus Torvalds
352 1da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
353 1da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
354 1da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
355 1da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
356 1da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
357 1da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
358 1da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
359 1da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
360 2331d1a6SSam RavnborgARCH		?= $(SUBARCH)
361 1da177e4SLinus Torvalds
362 1da177e4SLinus Torvalds# Architecture as present in compile.h
363 1da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
364 6752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
365 1da177e4SLinus Torvalds
366 d746d647SSam Ravnborg# Additional ARCH settings for x86
367 d746d647SSam Ravnborgifeq ($(ARCH),i386)
368 d746d647SSam Ravnborg        SRCARCH := x86
369 d746d647SSam Ravnborgendif
370 d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
371 d746d647SSam Ravnborg        SRCARCH := x86
372 d746d647SSam Ravnborgendif
373 74b469f2SSam Ravnborg
374 5e538790SSam Ravnborg# Additional ARCH settings for sparc
375 e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
376 e69f58c0SNamhyung Kim       SRCARCH := sparc
377 e69f58c0SNamhyung Kimendif
378 a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
379 5e538790SSam Ravnborg       SRCARCH := sparc
380 a439fe51SSam Ravnborgendif
381 2fb9b1bdSSam Ravnborg
382 3cc000b5SPaul Mundt# Additional ARCH settings for sh
383 3cc000b5SPaul Mundtifeq ($(ARCH),sh64)
384 3cc000b5SPaul Mundt       SRCARCH := sh
385 3cc000b5SPaul Mundtendif
386 3cc000b5SPaul Mundt
387 14cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
388 41263fc6SBen Gardinerexport KCONFIG_CONFIG
389 14cdd3c4SRoman Zippel
390 1da177e4SLinus Torvalds# SHELL used by kbuild
391 858805b3SMasahiro YamadaCONFIG_SHELL := sh
392 1da177e4SLinus Torvalds
393 6d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
394 6d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
395 6d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
396 d7f14c66SUwe Kleine-König
397 1da177e4SLinus TorvaldsHOSTCC       = gcc
398 1da177e4SLinus TorvaldsHOSTCXX      = g++
399 96f14fe7SLaura AbbottKBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
400 f92d19e0SLaura Abbott		-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
401 f92d19e0SLaura Abbott		$(HOSTCFLAGS)
402 f92d19e0SLaura AbbottKBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
403 f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
404 f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
405 1da177e4SLinus Torvalds
406 1da177e4SLinus Torvalds# Make variables (CC, etc...)
407 1da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
408 1da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
409 1da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
410 1da177e4SLinus TorvaldsCPP		= $(CC) -E
411 1da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
412 1da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
413 1da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
414 1da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
415 1da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
416 7bac9870SVasily GorbikOBJSIZE		= $(CROSS_COMPILE)size
417 e83b9f55SAndrii NakryikoPAHOLE		= pahole
418 73a4f6dbSMasahiro YamadaLEX		= flex
419 73a4f6dbSMasahiro YamadaYACC		= bison
420 1da177e4SLinus TorvaldsAWK		= awk
421 caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
422 1da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
423 1da177e4SLinus TorvaldsPERL		= perl
424 011bf125SMasahiro YamadaPYTHON		= python
425 e9781b52SMasahiro YamadaPYTHON2		= python2
426 e9781b52SMasahiro YamadaPYTHON3		= python3
427 1da177e4SLinus TorvaldsCHECK		= sparse
428 858805b3SMasahiro YamadaBASH		= bash
429 1da177e4SLinus Torvalds
430 80a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
431 6c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
432 0c22be07SDouglas AndersonNOSTDINC_FLAGS :=
433 6588169dSSam RavnborgCFLAGS_MODULE   =
434 6588169dSSam RavnborgAFLAGS_MODULE   =
435 6588169dSSam RavnborgLDFLAGS_MODULE  =
436 1da177e4SLinus TorvaldsCFLAGS_KERNEL	=
437 1da177e4SLinus TorvaldsAFLAGS_KERNEL	=
438 b36fad65SMichal MarekLDFLAGS_vmlinux =
439 1da177e4SLinus Torvalds
440 abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
441 abbf1590SDavid HowellsUSERINCLUDE    := \
442 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
443 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
444 abbf1590SDavid Howells		-I$(srctree)/include/uapi \
445 3308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
446 abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
447 abbf1590SDavid Howells
448 1da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
449 1da177e4SLinus Torvalds# Needed to be compatible with the O= option
450 abbf1590SDavid HowellsLINUXINCLUDE    := \
451 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
452 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
453 051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
454 f8224f7fSMasahiro Yamada		-I$(objtree)/include \
455 f8224f7fSMasahiro Yamada		$(USERINCLUDE)
456 1da177e4SLinus Torvalds
457 42a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
458 eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
459 42a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
460 b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
461 51b97e35SKirill A. Shutemov		   -Wno-format-security \
462 433dc2ebSMasahiro Yamada		   -std=gnu89
463 433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
464 80c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
465 80c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
466 6588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
467 6588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
468 10df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
469 10df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
470 d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
471 433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
472 5241ab4cSMasahiro YamadaCLANG_FLAGS :=
473 1da177e4SLinus Torvalds
474 858805b3SMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
475 7bac9870SVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL
476 7bac9870SVasily Gorbikexport PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
477 7bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
478 1da177e4SLinus Torvalds
479 d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
480 0e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
481 0e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
482 222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
483 6588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
484 80c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
485 1da177e4SLinus Torvalds
486 1da177e4SLinus Torvalds# Files to ignore in find ... statements
487 1da177e4SLinus Torvalds
488 ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
489 ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
490 ae63b2d7SPrarit Bhargava			  -prune -o
491 450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
492 450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
493 1da177e4SLinus Torvalds
494 1da177e4SLinus Torvalds# ===========================================================================
495 1da177e4SLinus Torvalds# Rules shared between *config targets and build targets
496 1da177e4SLinus Torvalds
497 312a3d09SCao jin# Basic helpers built in scripts/basic/
498 4f193362SPaul SmithPHONY += scripts_basic
499 1da177e4SLinus Torvaldsscripts_basic:
500 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
501 638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
502 1da177e4SLinus Torvalds
503 4f193362SPaul SmithPHONY += outputmakefile
504 e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
505 fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
506 fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
507 fd5f0cd6SJan Beulich# output directory.
508 3a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
509 3a51ff34SVladimir Kondratiev# ignore whole output directory
510 1da177e4SLinus Torvaldsoutputmakefile:
511 051f278eSMasahiro Yamadaifdef building_out_of_srctree
512 e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
513 e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
514 e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
515 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
516 e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
517 e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
518 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
519 e8e83a23SMasahiro Yamada		false; \
520 e8e83a23SMasahiro Yamada	fi
521 92979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
522 4fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
523 156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
524 156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
525 fd5f0cd6SJan Beulichendif
526 1da177e4SLinus Torvalds
527 99516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
528 ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
529 5241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
530 ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
531 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)
532 ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
533 ae6b289aSChris Friesendif
534 ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
535 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
536 ae6b289aSChris Friesendif
537 876a0600SNathan Chancellorifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),)
538 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
539 876a0600SNathan Chancellorendif
540 589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
541 238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
542 238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
543 3bd98050SJoel Stanleyexport CLANG_FLAGS
544 ae6b289aSChris Friesendif
545 ae6b289aSChris Fries
546 315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
547 315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
548 315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
549 315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
550 902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
551 315bab4eSMasahiro Yamada
552 2042b548SMasahiro Yamadaifdef config-build
553 1da177e4SLinus Torvalds# ===========================================================================
554 1da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
555 1da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
556 1da177e4SLinus Torvalds
557 1da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
558 1da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
559 1da177e4SLinus Torvalds# used for 'make defconfig'
560 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
561 315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
562 1da177e4SLinus Torvalds
563 36de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
564 31110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
565 31110ebbSSam Ravnborg
566 36de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
567 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
568 1da177e4SLinus Torvalds
569 2042b548SMasahiro Yamadaelse #!config-build
570 1da177e4SLinus Torvalds# ===========================================================================
571 1da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
572 1da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
573 1da177e4SLinus Torvalds
574 2c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
575 2c1f4f12SMasahiro Yamada# but instead _all depend on modules
576 2c1f4f12SMasahiro YamadaPHONY += all
577 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
578 2c1f4f12SMasahiro Yamada_all: all
579 2c1f4f12SMasahiro Yamadaelse
580 2c1f4f12SMasahiro Yamada_all: modules
581 2c1f4f12SMasahiro Yamadaendif
582 2c1f4f12SMasahiro Yamada
583 2c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
584 2c1f4f12SMasahiro Yamada# Normally, just do built-in.
585 2c1f4f12SMasahiro Yamada
586 2c1f4f12SMasahiro YamadaKBUILD_MODULES :=
587 2c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
588 2c1f4f12SMasahiro Yamada
589 2c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
590 2c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider
591 2c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to
592 2c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them.
593 2c1f4f12SMasahiro Yamada
594 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
595 2c1f4f12SMasahiro Yamada  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
596 2c1f4f12SMasahiro Yamadaendif
597 2c1f4f12SMasahiro Yamada
598 2c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
599 2c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
600 2c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
601 2c1f4f12SMasahiro Yamada
602 d85103acSMasahiro Yamadaifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
603 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
604 2c1f4f12SMasahiro Yamadaendif
605 2c1f4f12SMasahiro Yamada
606 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
607 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
608 2c1f4f12SMasahiro Yamadaendif
609 2c1f4f12SMasahiro Yamada
610 2c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
611 2c1f4f12SMasahiro Yamada
612 2042b548SMasahiro Yamadaifdef need-config
613 d93a18f2SMasahiro Yamadainclude include/config/auto.conf
614 d93a18f2SMasahiro Yamadaendif
615 d93a18f2SMasahiro Yamada
616 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
617 1da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
618 1da177e4SLinus Torvaldsinit-y		:= init/
619 f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
620 d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
621 43c78d88SMasahiro Yamadadrivers-$(CONFIG_KERNEL_HEADER_TEST) += include/
622 1da177e4SLinus Torvaldsnet-y		:= net/
623 1da177e4SLinus Torvaldslibs-y		:= lib/
624 1da177e4SLinus Torvaldscore-y		:= usr/
625 37d9fe47SFeng Wuvirt-y		:= virt/
626 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
627 1da177e4SLinus Torvalds
628 315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
629 315bab4eSMasahiro Yamada# command line.
630 315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
631 315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
632 315bab4eSMasahiro Yamadaall: vmlinux
633 315bab4eSMasahiro Yamada
634 315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
635 315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
636 315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
637 5aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
638 315bab4eSMasahiro Yamada
639 b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
640 b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
641 b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
642 b1f4ff74SPaulo Zanoniendif
643 b1f4ff74SPaulo Zanoni
644 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
645 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
646 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
647 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
648 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
649 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
650 669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
651 669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
652 669e06b1SMasahiro Yamada
653 315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
654 315bab4eSMasahiro Yamada
655 2042b548SMasahiro Yamadaifdef need-config
656 2042b548SMasahiro Yamadaifdef may-sync-config
657 315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
658 315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
659 315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
660 d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
661 1da177e4SLinus Torvalds
662 05850719SMasahiro Yamada$(KCONFIG_CONFIG):
663 05850719SMasahiro Yamada	@echo >&2 '***'
664 05850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
665 05850719SMasahiro Yamada	@echo >&2 '***'
666 05850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
667 05850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
668 05850719SMasahiro Yamada	@echo >&2 '***'
669 05850719SMasahiro Yamada	@/bin/false
670 1da177e4SLinus Torvalds
671 61277981SUlf Magnusson# The actual configuration files used during the build are stored in
672 61277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
673 61277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
674 9390dff6SMasahiro Yamada#
675 9390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
676 9390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
677 9390dff6SMasahiro Yamada%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
678 911a91c3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
679 2042b548SMasahiro Yamadaelse # !may-sync-config
680 d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
681 d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
682 d7942413SMasahiro Yamada# Use auto.conf to trigger the test
683 9ee4e336SSam RavnborgPHONY += include/config/auto.conf
684 9ee4e336SSam Ravnborg
685 9ee4e336SSam Ravnborginclude/config/auto.conf:
686 264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
687 5369f550SMichal Marek	echo >&2;							\
688 5369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
689 5369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
690 5369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
691 5369f550SMichal Marek	echo >&2 ;							\
692 9ee4e336SSam Ravnborg	/bin/false)
693 9ee4e336SSam Ravnborg
694 d7942413SMasahiro Yamadaendif # may-sync-config
695 2042b548SMasahiro Yamadaendif # need-config
696 1da177e4SLinus Torvalds
697 a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
698 ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
699 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
700 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
701 6f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
702 a1c48bb1SGeert Uytterhoeven
703 15f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
704 a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
705 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
706 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
707 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
708 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
709 1da177e4SLinus Torvaldsendif
710 1da177e4SLinus Torvalds
711 b303c6dfSMasahiro Yamadaifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
712 b303c6dfSMasahiro YamadaKBUILD_CFLAGS   += -Wno-maybe-uninitialized
713 b303c6dfSMasahiro Yamadaendif
714 a76bcf55SArnd Bergmann
715 69102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
716 69102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
717 69102311SJiri Kosina
718 d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov
719 6b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
720 6b90bd4bSEmese Revfy
721 1873e870SAndi Kleenifdef CONFIG_READABLE_ASM
722 1873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
723 1873e870SAndi Kleen# reorder blocks reorders the control in the function
724 1873e870SAndi Kleen# ipa clone creates specialized cloned functions
725 1873e870SAndi Kleen# partial inlining inlines only parts of functions
726 1873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
727 1873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
728 1873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
729 1873e870SAndi Kleenendif
730 1873e870SAndi Kleen
731 08f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
732 35bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
733 35bb5b1eSAndi Kleenendif
734 35bb5b1eSAndi Kleen
735 2a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
736 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
737 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
738 2a61f474SMasahiro Yamada
739 2a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
740 e06b8b98SSam Ravnborg
741 076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
742 a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
743 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
744 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
745 cfe17c9bSMasahiro Yamada# Quiet clang warning: comparison of unsigned expression < 0 is always false
746 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-tautological-compare
747 cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
748 cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
749 cfe17c9bSMasahiro Yamada# See modpost pattern 2
750 a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
751 cfe17c9bSMasahiro Yamadaelse
752 cfe17c9bSMasahiro Yamada
753 cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
754 cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
755 9df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
756 e2079e93SNathan Chancellor
757 e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
758 e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
759 e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
760 e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
761 cfe17c9bSMasahiro Yamadaendif
762 cfe17c9bSMasahiro Yamada
763 0a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
764 1da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
765 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
766 1da177e4SLinus Torvaldselse
767 7e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
768 7e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
769 7e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
770 7e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
771 7e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
772 7e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
773 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
774 1da177e4SLinus Torvaldsendif
775 7e9501fdSRabin Vincentendif
776 1da177e4SLinus Torvalds
777 709a972eSKees Cook# Initialize all stack variables with a pattern, if desired.
778 709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL
779 709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
780 709a972eSKees Cookendif
781 709a972eSKees Cook
782 1e88e415SMasahiro YamadaDEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
783 2062afb4SLinus Torvalds
784 1da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
785 866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
786 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
787 866ced95SAndi Kleenelse
788 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
789 866ced95SAndi Kleenendif
790 2288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
791 1da177e4SLinus Torvaldsendif
792 bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
793 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
794 bfaf2dd3SAndi Kleenendif
795 1da177e4SLinus Torvalds
796 d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
797 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
798 e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
799 d6f4ceb7SAndi Kleenendif
800 d6f4ceb7SAndi Kleen
801 1e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
802 1e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
803 1e88e415SMasahiro Yamada
804 606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
805 07d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
806 07d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
807 07d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
808 07d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
809 07d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
810 a2546faeSSteven Rostedt  endif
811 2f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
812 2f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
813 2f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
814 2f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
815 2f4df001SVasily Gorbik    endif
816 2f4df001SVasily Gorbik  endif
817 07d04081SVasily Gorbikendif
818 a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
819 f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
820 f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
821 f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
822 a2546faeSSteven Rostedt  endif
823 f28bc3c3SVasily Gorbikendif
824 f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
825 f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
826 f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
827 72441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
828 cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
829 72441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
830 72441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
831 72441cb1SSteven Rostedt	endif
832 72441cb1SSteven Rostedtendif
833 16444a8aSArnaldo Carvalho de Meloendif
834 16444a8aSArnaldo Carvalho de Melo
835 91341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
836 91341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
837 91341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
838 91341d4bSSam Ravnborgendif
839 91341d4bSSam Ravnborg
840 90ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
841 e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
842 e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
843 90ad4052SMasahiro Yamadaendif
844 90ad4052SMasahiro Yamada
845 43bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH
846 43bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
847 43bd3a95SMiroslav Benesendif
848 43bd3a95SMiroslav Benes
849 e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
850 e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
851 e8e69931SSam Ravnborg
852 1da177e4SLinus Torvalds# warn about C99 declaration after statement
853 a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
854 1da177e4SLinus Torvalds
855 0bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
856 8289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
857 0bb95f80SKees Cook
858 070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
859 fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
860 1da177e4SLinus Torvalds
861 217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
862 217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
863 217c3e01SStephen Rothwell
864 fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
865 a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
866 d0115552SLinus Torvalds
867 87e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this
868 87e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we
869 87e0d4f0SDaniel Borkmann# need to disable it here generally.
870 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fno-merge-all-constants)
871 87e0d4f0SDaniel Borkmann
872 87e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine
873 87e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled.
874 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fmerge-constants)
875 87e0d4f0SDaniel Borkmann
876 3ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
877 3ce120b1SLinus TorvaldsKBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
878 3ce120b1SLinus Torvalds
879 8f7f5c9fSAndi Kleen# conserve stack if available
880 8f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
881 8f7f5c9fSAndi Kleen
882 fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
883 fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
884 fe7c36c7SJosh Triplett
885 ea8daa7bSDaniel Wagner# enforce correct pointer usage
886 ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
887 ea8daa7bSDaniel Wagner
888 c834f0e8SKees Cook# Require designated initializers for all marked structures
889 c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
890 c834f0e8SKees Cook
891 a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
892 a73619a8SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
893 a73619a8SMasahiro Yamada
894 29be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is
895 29be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern
896 29be86d7SSeth Forsheeifdef CONFIG_RETPOLINE
897 29be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
898 29be86d7SSeth Forsheeendif
899 29be86d7SSeth Forshee
900 a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
901 a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
902 c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
903 a86fe353SMasahiro Yamada
904 8cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
905 8cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
906 8cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
907 8cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
908 52bcc330SSam Ravnborg
909 89ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id
910 89ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id
911 18991197SRoland McGrath
912 5d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
913 d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
914 5d7d18f5SDavid Howellsendif
915 5d7d18f5SDavid Howells
916 5cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
917 5cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
918 5cf896fbSPeter Collingbourneendif
919 5cf896fbSPeter Collingbourne
920 14516765SLuc Van Oostenryck# insure the checker run with the right endianness
921 14516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
922 14516765SLuc Van Oostenryck
923 1f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
924 1f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
925 1f2f01b1SLuc Van Oostenryck
926 1da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
927 1da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
928 1da177e4SLinus Torvalds# set in the environment
929 1da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
930 1da177e4SLinus Torvalds# this default value
931 1da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
932 1da177e4SLinus Torvalds
933 1da177e4SLinus Torvalds#
934 1da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
935 1da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
936 1da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
937 1da177e4SLinus Torvalds
938 1da177e4SLinus Torvalds#
939 f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
940 f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
941 f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
942 f4d4ffc0SJason Cooper#
943 f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
944 f4d4ffc0SJason Cooper
945 f4d4ffc0SJason Cooper#
946 1da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
947 1da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
948 070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
949 1da177e4SLinus Torvalds#
950 1da177e4SLinus Torvalds
951 df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
952 1da177e4SLinus Torvaldsexport MODLIB
953 1da177e4SLinus Torvalds
954 ac031f26STheodore Ts'o#
955 2ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
956 2ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
957 2ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
958 177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
959 2ea03891SSam Ravnborg
960 ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
961 ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
962 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
963 ac031f26STheodore Ts'oelse
964 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
965 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
966 ac031f26STheodore Ts'oelse
967 2ea03891SSam Ravnborgmod_strip_cmd = true
968 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
969 ac031f26STheodore Ts'oexport mod_strip_cmd
970 ac031f26STheodore Ts'o
971 beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
972 beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
973 beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
974 beb50df3SBertrand Jacquin
975 beb50df3SBertrand Jacquinmod_compress_cmd = true
976 beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
977 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
978 3d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
979 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
980 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
981 3d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
982 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
983 beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
984 beb50df3SBertrand Jacquinexport mod_compress_cmd
985 beb50df3SBertrand Jacquin
986 d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
987 3ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
988 3ee550f1SDavid Woodhouse
989 3ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
990 e2a666d5SRusty Russellelse
991 e2a666d5SRusty Russellmod_sign_cmd = true
992 e2a666d5SRusty Russellendif
993 e2a666d5SRusty Russellexport mod_sign_cmd
994 e2a666d5SRusty Russell
995 056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
996 056d28d1SRolf Eike Beer
997 9f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
998 9f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
999 056d28d1SRolf Eike Beer		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1000 9f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
1001 9f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
1002 9f0c18aeSJosh Poimboeuf  else
1003 9f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
1004 9f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
1005 9f0c18aeSJosh Poimboeuf  endif
1006 9f0c18aeSJosh Poimboeufendif
1007 9f0c18aeSJosh Poimboeuf
1008 e00d8880SMasahiro YamadaPHONY += prepare0
1009 e2a666d5SRusty Russell
1010 394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
1011 47801c97SMasahiro Yamada
1012 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1013 cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1014 1da177e4SLinus Torvalds
1015 1da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
1016 1da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
1017 37d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
1018 1da177e4SLinus Torvalds
1019 1eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
1020 1eaca4b9SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
1021 1eaca4b9SMasahiro Yamada			$(drivers-) $(net-) $(libs-) $(virt-))))
1022 1da177e4SLinus Torvalds
1023 c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
1024 76cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1025 c99f3918SMasahiro Yamada
1026 f49821eeSNicholas Piggininit-y		:= $(patsubst %/, %/built-in.a, $(init-y))
1027 f49821eeSNicholas Piggincore-y		:= $(patsubst %/, %/built-in.a, $(core-y))
1028 f49821eeSNicholas Piggindrivers-y	:= $(patsubst %/, %/built-in.a, $(drivers-y))
1029 f49821eeSNicholas Pigginnet-y		:= $(patsubst %/, %/built-in.a, $(net-y))
1030 1da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
1031 f49821eeSNicholas Pigginlibs-y2		:= $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
1032 f49821eeSNicholas Pigginvirt-y		:= $(patsubst %/, %/built-in.a, $(virt-y))
1033 1da177e4SLinus Torvalds
1034 1f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1035 d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
1036 d151e971SMasahiro Yamada			      $(drivers-y) $(net-y) $(virt-y)
1037 3a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1)
1038 95698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
1039 1f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
1040 85f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1041 233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
1042 1da177e4SLinus Torvalds
1043 d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1044 1da177e4SLinus Torvalds
1045 3fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
1046 3fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
1047 2441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
1048 c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order
1049 ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1050 86556392SNicolas Pitre	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
1051 2441e78bSNicolas Pitreendif
1052 23121ca2SNicolas Pitre
1053 1f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
1054 1f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
1055 1f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
1056 1f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS
1057 1f50b80aSMasahiro Yamada  KBUILD_MODULES := 1
1058 1f50b80aSMasahiro Yamadaendif
1059 1f50b80aSMasahiro Yamada
1060 07a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1061 07a422bbSMasahiro Yamada
1062 07a422bbSMasahiro Yamada$(autoksyms_h):
1063 07a422bbSMasahiro Yamada	$(Q)mkdir -p $(dir $@)
1064 07a422bbSMasahiro Yamada	$(Q)touch $@
1065 23121ca2SNicolas Pitre
1066 fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1067 fbe6e37dSNicholas Piggin
1068 fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1069 fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
1070 d503ac53SMasahiro Yamada	$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
1071 fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1072 2441e78bSNicolas Pitre
1073 3fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1074 1f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1075 741f98feSSam Ravnborg
1076 392885eeSMasahiro Yamadatargets := vmlinux
1077 392885eeSMasahiro Yamada
1078 1da177e4SLinus Torvalds# The actual objects are generated when descending,
1079 1da177e4SLinus Torvalds# make sure no implicit rule kicks in
1080 c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ;
1081 1da177e4SLinus Torvalds
1082 ba97df45SMasahiro Yamadafilechk_kernel.release = \
1083 0d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1084 0d0e7718SMichal Marek
1085 83a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
1086 24512795SMasahiro Yamadainclude/config/kernel.release: FORCE
1087 0d0e7718SMichal Marek	$(call filechk,kernel.release)
1088 cb58455cSSam Ravnborg
1089 d8821622SMasahiro Yamada# Additional helpers built in scripts/
1090 d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1091 d8821622SMasahiro Yamada# in parallel
1092 d8821622SMasahiro YamadaPHONY += scripts
1093 60df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1094 d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1095 cb58455cSSam Ravnborg
1096 1da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
1097 5bb78269SSam Ravnborg# or the modules are listed in "prepare".
1098 5bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
1099 5bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
1100 5bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
1101 1da177e4SLinus Torvalds
1102 a5139fb3SMasahiro YamadaPHONY += prepare archprepare
1103 5bb78269SSam Ravnborg
1104 36de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1105 30527cefSMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
1106 5bb78269SSam Ravnborg
1107 65bba042SMasahiro Yamadaprepare0: archprepare
1108 60df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
1109 8d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
1110 86feeaa8SSam Ravnborg
1111 1da177e4SLinus Torvalds# All the preparing..
1112 b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1113 b9ab5ebbSJosh Poimboeuf
1114 2c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
1115 7d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1116 7d0e5c20SMasahiro Yamada
1117 2c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
1118 2c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1119 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1120 037fc336SMasahiro Yamada	generic=include/asm-generic
1121 2c1f4f12SMasahiro Yamadauapi-asm-generic:
1122 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1123 037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
1124 2c1f4f12SMasahiro Yamada
1125 b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
1126 3b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1127 ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1128 ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1129 ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1130 ef7cfd00SMasahiro Yamada	@false
1131 ef7cfd00SMasahiro Yamadaelse
1132 ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1133 ef7cfd00SMasahiro Yamadaendif
1134 ef7cfd00SMasahiro Yamadaendif
1135 1da177e4SLinus Torvalds
1136 1da177e4SLinus Torvalds# Generate some files
1137 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1138 1da177e4SLinus Torvalds
1139 1da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
1140 1da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
1141 1da177e4SLinus Torvalds
1142 1da177e4SLinus Torvaldsuts_len := 64
1143 63104eecSSam Ravnborgdefine filechk_utsrelease.h
1144 1da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1145 1da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1146 1da177e4SLinus Torvalds	  exit 1;                                                         \
1147 1da177e4SLinus Torvalds	fi;                                                               \
1148 ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1149 1da177e4SLinus Torvaldsendef
1150 1da177e4SLinus Torvalds
1151 63104eecSSam Ravnborgdefine filechk_version.h
1152 ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
1153 78d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1154 ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1155 63104eecSSam Ravnborgendef
1156 63104eecSSam Ravnborg
1157 43fee2b2SMasahiro Yamada$(version_h): FORCE
1158 1da177e4SLinus Torvalds	$(call filechk,version.h)
1159 223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
1160 1da177e4SLinus Torvalds
1161 273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
1162 63104eecSSam Ravnborg	$(call filechk,utsrelease.h)
1163 63104eecSSam Ravnborg
1164 179efcb4SVegard NossumPHONY += headerdep
1165 179efcb4SVegard Nossumheaderdep:
1166 9663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1167 9663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1168 179efcb4SVegard Nossum
1169 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1170 8d730cfbSDavid Woodhouse# Kernel headers
1171 8d730cfbSDavid Woodhouse
1172 e6883b18SSam Ravnborg#Default location for installed headers
1173 e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1174 e6883b18SSam Ravnborg
1175 59b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1176 59b2bd05SMasahiro Yamada      cmd_headers_install = \
1177 59b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
1178 59b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1179 59b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
1180 6d716275SDavid Woodhouse
1181 8d730cfbSDavid WoodhousePHONY += headers_install
1182 59b2bd05SMasahiro Yamadaheaders_install: headers
1183 59b2bd05SMasahiro Yamada	$(call cmd,headers_install)
1184 4f193362SPaul Smith
1185 1da177e4SLinus TorvaldsPHONY += archheaders archscripts
1186 1da177e4SLinus Torvalds
1187 a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1188 1da177e4SLinus Torvalds
1189 59b2bd05SMasahiro YamadaPHONY += headers
1190 59b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1191 9d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1192 2fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1193 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1194 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1195 1f85712eSMike Frysinger
1196 68475359SDavid WoodhousePHONY += headers_check
1197 59b2bd05SMasahiro Yamadaheaders_check: headers
1198 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1199 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1
1200 68475359SDavid Woodhouse
1201 e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
1202 59b2bd05SMasahiro Yamadaprepare: headers
1203 e949f4c2SMasahiro Yamadaendif
1204 1da177e4SLinus Torvalds
1205 257edce6SMasahiro Yamadaifdef CONFIG_HEADERS_CHECK
1206 257edce6SMasahiro Yamadaall: headers_check
1207 257edce6SMasahiro Yamadaendif
1208 257edce6SMasahiro Yamada
1209 bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1210 bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1211 bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1212 bdd7714bSMasahiro Yamada
1213 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1214 5a5da78bSShuah Khan# Kernel selftest
1215 5a5da78bSShuah Khan
1216 5a5da78bSShuah KhanPHONY += kselftest
1217 5a5da78bSShuah Khankselftest:
1218 2bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1219 5a5da78bSShuah Khan
1220 17eac6c2SShuah Khankselftest-%: FORCE
1221 17eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1222 dcb825a9SWang Long
1223 3d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
1224 3d6dee7aSBamvor Jian Zhangkselftest-merge:
1225 3d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1226 6d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
1227 6d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1228 3e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1229 3d6dee7aSBamvor Jian Zhang
1230 5a5da78bSShuah Khan# ---------------------------------------------------------------------------
1231 37c8a5faSRob Herring# Devicetree files
1232 37c8a5faSRob Herring
1233 37c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1234 37c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
1235 37c8a5faSRob Herringendif
1236 37c8a5faSRob Herring
1237 37c8a5faSRob Herringifneq ($(dtstree),)
1238 37c8a5faSRob Herring
1239 a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
1240 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1241 37c8a5faSRob Herring
1242 4f0e3a57SRob HerringPHONY += dtbs dtbs_install dt_binding_check
1243 a5139fb3SMasahiro Yamadadtbs dtbs_check: include/config/kernel.release scripts_dtc
1244 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
1245 37c8a5faSRob Herring
1246 4f0e3a57SRob Herringdtbs_check: export CHECK_DTBS=1
1247 4f0e3a57SRob Herringdtbs_check: dt_binding_check
1248 4f0e3a57SRob Herring
1249 37c8a5faSRob Herringdtbs_install:
1250 37c8a5faSRob Herring	$(Q)$(MAKE) $(dtbinst)=$(dtstree)
1251 37c8a5faSRob Herring
1252 37c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
1253 37c8a5faSRob Herringall: dtbs
1254 37c8a5faSRob Herringendif
1255 37c8a5faSRob Herring
1256 37c8a5faSRob Herringendif
1257 37c8a5faSRob Herring
1258 37c8a5faSRob HerringPHONY += scripts_dtc
1259 37c8a5faSRob Herringscripts_dtc: scripts_basic
1260 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
1261 37c8a5faSRob Herring
1262 4f0e3a57SRob Herringdt_binding_check: scripts_dtc
1263 4f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1264 4f0e3a57SRob Herring
1265 37c8a5faSRob Herring# ---------------------------------------------------------------------------
1266 1da177e4SLinus Torvalds# Modules
1267 1da177e4SLinus Torvalds
1268 1da177e4SLinus Torvaldsifdef CONFIG_MODULES
1269 1da177e4SLinus Torvalds
1270 1da177e4SLinus Torvalds# By default, build modules as well
1271 1da177e4SLinus Torvalds
1272 73d1393eSMichal Marekall: modules
1273 1da177e4SLinus Torvalds
1274 1da177e4SLinus Torvalds# Build modules
1275 551559e1STejun Heo#
1276 551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1277 551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1278 551559e1STejun Heo# using awk while concatenating to the final file.
1279 1da177e4SLinus Torvalds
1280 4f193362SPaul SmithPHONY += modules
1281 68980b47SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin
1282 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1283 3a48a919SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
1284 1da177e4SLinus Torvalds
1285 c99f3918SMasahiro Yamadamodules.order: descend
1286 c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1287 a6c36632SMichal Marek
1288 c99f3918SMasahiro Yamadamodbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs))
1289 a6c36632SMichal Marek
1290 50ef0cdfSMasahiro Yamadamodules.builtin: $(modbuiltin-dirs)
1291 c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1292 1da177e4SLinus Torvalds
1293 50ef0cdfSMasahiro YamadaPHONY += $(modbuiltin-dirs)
1294 50ef0cdfSMasahiro Yamada# tristate.conf is not included from this Makefile. Add it as a prerequisite
1295 50ef0cdfSMasahiro Yamada# here to make it self-healing in case somebody accidentally removes it.
1296 50ef0cdfSMasahiro Yamada$(modbuiltin-dirs): include/config/tristate.conf
1297 50ef0cdfSMasahiro Yamada	$(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@)
1298 1da177e4SLinus Torvalds
1299 1da177e4SLinus Torvalds# Target to prepare building external modules
1300 4f193362SPaul SmithPHONY += modules_prepare
1301 059bc9fcSMasahiro Yamadamodules_prepare: prepare
1302 1da177e4SLinus Torvalds
1303 1da177e4SLinus Torvalds# Target to install modules
1304 4f193362SPaul SmithPHONY += modules_install
1305 1da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
1306 1da177e4SLinus Torvalds
1307 4f193362SPaul SmithPHONY += _modinst_
1308 2da30e70SMichal Marek_modinst_:
1309 1da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
1310 1da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
1311 1da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
1312 8e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
1313 1da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1314 1da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
1315 7e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
1316 1da177e4SLinus Torvalds	fi
1317 1bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
1318 1bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin
1319 898490c0SAlexey Gladkov	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1320 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1321 1da177e4SLinus Torvalds
1322 50a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
1323 1da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
1324 1da177e4SLinus Torvalds# boot script depmod is the master version.
1325 4f193362SPaul SmithPHONY += _modinst_post
1326 6d128e1eSLinus Torvalds_modinst_post: _modinst_
1327 50a8ec31SSam Ravnborg	$(call cmd,depmod)
1328 1da177e4SLinus Torvalds
1329 d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1330 d890f510SJosh BoyerPHONY += modules_sign
1331 d890f510SJosh Boyermodules_sign:
1332 d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1333 d890f510SJosh Boyerendif
1334 d890f510SJosh Boyer
1335 1da177e4SLinus Torvaldselse # CONFIG_MODULES
1336 1da177e4SLinus Torvalds
1337 1da177e4SLinus Torvalds# Modules not configured
1338 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1339 1da177e4SLinus Torvalds
1340 612e47ceSMasahiro YamadaPHONY += modules modules_install
1341 612e47ceSMasahiro Yamadamodules modules_install:
1342 5369f550SMichal Marek	@echo >&2
1343 5369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
1344 5369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
1345 5369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
1346 5369f550SMichal Marek	@echo >&2
1347 1da177e4SLinus Torvalds	@exit 1
1348 1da177e4SLinus Torvalds
1349 1da177e4SLinus Torvaldsendif # CONFIG_MODULES
1350 1da177e4SLinus Torvalds
1351 1da177e4SLinus Torvalds###
1352 1da177e4SLinus Torvalds# Cleaning is done on three levels.
1353 1da177e4SLinus Torvalds# make clean     Delete most generated files
1354 1da177e4SLinus Torvalds#                Leave enough to build external modules
1355 1da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
1356 1da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
1357 1da177e4SLinus Torvalds
1358 1da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1359 b7dca6ddSMasahiro YamadaCLEAN_DIRS  += include/ksym
1360 898490c0SAlexey GladkovCLEAN_FILES += modules.builtin.modinfo
1361 1da177e4SLinus Torvalds
1362 1da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1363 d6fc9fcbSMasahiro YamadaMRPROPER_DIRS  += include/config include/generated          \
1364 46a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
1365 46a63d4bSMasahiro Yamada		  debian/ snap/ tar-install/
1366 278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \
1367 46457133SMasahiro Yamada		  Module.symvers \
1368 fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1369 fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
1370 46a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
1371 46a63d4bSMasahiro Yamada		  *.spec
1372 1da177e4SLinus Torvalds
1373 46457133SMasahiro Yamada# Directories & files removed with 'make distclean'
1374 46457133SMasahiro YamadaDISTCLEAN_DIRS  +=
1375 46457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1376 46457133SMasahiro Yamada
1377 1da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
1378 1da177e4SLinus Torvalds#
1379 1da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
1380 1da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1381 1da177e4SLinus Torvalds
1382 76cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
1383 1da177e4SLinus Torvalds
1384 bd1ee804SPawel Mollvmlinuxclean:
1385 bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1386 fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1387 bd1ee804SPawel Moll
1388 bd1ee804SPawel Mollclean: archclean vmlinuxclean
1389 1da177e4SLinus Torvalds
1390 1da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
1391 1da177e4SLinus Torvalds#
1392 1da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1393 1da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1394 cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
1395 1da177e4SLinus Torvalds
1396 b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
1397 1da177e4SLinus Torvalds$(mrproper-dirs):
1398 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1399 1da177e4SLinus Torvalds
1400 b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
1401 1da177e4SLinus Torvalds	$(call cmd,rmdirs)
1402 1da177e4SLinus Torvalds	$(call cmd,rmfiles)
1403 1da177e4SLinus Torvalds
1404 1da177e4SLinus Torvalds# distclean
1405 1da177e4SLinus Torvalds#
1406 46457133SMasahiro Yamadadistclean: rm-dirs  := $(wildcard $(DISTCLEAN_DIRS))
1407 46457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
1408 46457133SMasahiro Yamada
1409 4f193362SPaul SmithPHONY += distclean
1410 1da177e4SLinus Torvalds
1411 1da177e4SLinus Torvaldsdistclean: mrproper
1412 46457133SMasahiro Yamada	$(call cmd,rmdirs)
1413 46457133SMasahiro Yamada	$(call cmd,rmfiles)
1414 1da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
1415 1da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1416 f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1417 f78271dfSMasahiro Yamada		-o -name 'core' \) \
1418 1da177e4SLinus Torvalds		-type f -print | xargs rm -f
1419 1da177e4SLinus Torvalds
1420 1da177e4SLinus Torvalds
1421 1da177e4SLinus Torvalds# Packaging of the kernel to various formats
1422 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1423 1da177e4SLinus Torvalds
1424 bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1425 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1426 031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1427 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1428 1da177e4SLinus Torvalds
1429 1da177e4SLinus Torvalds# Brief documentation of the typical targets used
1430 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1431 1da177e4SLinus Torvalds
1432 5dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1433 a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
1434 5dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1435 5dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
1436 1da177e4SLinus Torvalds
1437 fe69b420SMasahiro YamadaPHONY += help
1438 1da177e4SLinus Torvaldshelp:
1439 1da177e4SLinus Torvalds	@echo  'Cleaning targets:'
1440 5ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
1441 5cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
1442 5ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1443 5cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
1444 1da177e4SLinus Torvalds	@echo  ''
1445 1da177e4SLinus Torvalds	@echo  'Configuration targets:'
1446 1da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1447 1da177e4SLinus Torvalds	@echo  ''
1448 1da177e4SLinus Torvalds	@echo  'Other generic targets:'
1449 1da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
1450 1da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
1451 1da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
1452 9cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1453 1da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
1454 40ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1455 433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1456 433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
1457 62718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1458 62718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1459 155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1460 c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
1461 1da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
1462 1da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1463 f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
1464 3f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
1465 3f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
1466 3f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
1467 2fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1468 59df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1469 2fb9b1bdSSam Ravnborg	 echo  ''
1470 31b8cc80SRandy Dunlap	@echo  'Static analysers:'
1471 1da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1472 1da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1473 aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1474 ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1475 295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1476 179efcb4SVegard Nossum	@echo  '  headers_check   - Sanity check on exported headers'
1477 74425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
1478 7f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
1479 74425eeeSNicolas Palix	@echo  ''
1480 eb8305aeSMatthias Maennich	@echo  'Tools:'
1481 eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1482 eb8305aeSMatthias Maennich	@echo  ''
1483 31b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1484 5a5da78bSShuah Khan	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
1485 5a5da78bSShuah Khan	@echo  '                    Build, install, and boot kernel before'
1486 5a5da78bSShuah Khan	@echo  '                    running kselftest on it'
1487 dcb825a9SWang Long	@echo  '  kselftest-clean - Remove all generated kselftest files'
1488 bbfe63b6SRandy Dunlap	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existing'
1489 3d6dee7aSBamvor Jian Zhang	@echo  '                    .config.'
1490 5a5da78bSShuah Khan	@echo  ''
1491 37c8a5faSRob Herring	@$(if $(dtstree), \
1492 37c8a5faSRob Herring		echo 'Devicetree:'; \
1493 37c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
1494 37c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1495 7aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
1496 7aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
1497 37c8a5faSRob Herring		echo '')
1498 37c8a5faSRob Herring
1499 31b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
1500 31b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
1501 31b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
1502 31b8cc80SRandy Dunlap	@echo  ''
1503 1da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1504 000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
1505 1da177e4SLinus Torvalds	@echo  ''
1506 1da177e4SLinus Torvalds	@echo  'Documentation targets:'
1507 cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1508 1da177e4SLinus Torvalds	@echo  ''
1509 01dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
1510 1da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
1511 01dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
1512 1da177e4SLinus Torvalds	@echo  ''
1513 1da177e4SLinus Torvalds	@$(if $(boards), \
1514 1da177e4SLinus Torvalds		$(foreach b, $(boards), \
1515 1da177e4SLinus Torvalds		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1516 1da177e4SLinus Torvalds		echo '')
1517 5dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
1518 5dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
1519 5dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1520 5dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
1521 5dffbe81SSegher Boessenkool		echo '')
1522 1da177e4SLinus Torvalds
1523 1da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1524 45d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1525 1da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1526 9ba26a72SCao jin	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1527 701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1528 af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1529 e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
1530 28bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
1531 28bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
1532 28bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1533 a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
1534 1da177e4SLinus Torvalds	@echo  ''
1535 1da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
1536 1da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
1537 1da177e4SLinus Torvalds
1538 1da177e4SLinus Torvalds
1539 5dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
1540 5dffbe81SSegher Boessenkool
1541 5dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
1542 5dffbe81SSegher Boessenkool
1543 fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1544 5dffbe81SSegher Boessenkool
1545 5dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
1546 5dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
1547 5dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
1548 5dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
1549 5dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1550 5dffbe81SSegher Boessenkool		echo '')
1551 5dffbe81SSegher Boessenkool
1552 5dffbe81SSegher Boessenkool
1553 1da177e4SLinus Torvalds# Documentation targets
1554 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1555 e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1556 e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
1557 22cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1558 bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1559 cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
1560 1da177e4SLinus Torvalds
1561 67274c08SMasahiro Yamada# Misc
1562 67274c08SMasahiro Yamada# ---------------------------------------------------------------------------
1563 67274c08SMasahiro Yamada
1564 67274c08SMasahiro YamadaPHONY += scripts_gdb
1565 7a739ce5SMasahiro Yamadascripts_gdb: prepare0
1566 1e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
1567 8d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1568 67274c08SMasahiro Yamada
1569 67274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
1570 67274c08SMasahiro Yamadaall: scripts_gdb
1571 67274c08SMasahiro Yamadaendif
1572 67274c08SMasahiro Yamada
1573 1da177e4SLinus Torvaldselse # KBUILD_EXTMOD
1574 1da177e4SLinus Torvalds
1575 1da177e4SLinus Torvalds###
1576 1da177e4SLinus Torvalds# External module support.
1577 1da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
1578 1da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
1579 1da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
1580 1da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
1581 1da177e4SLinus Torvalds# be used.
1582 1da177e4SLinus Torvalds#
1583 1da177e4SLinus Torvalds# The following are the only valid targets when building external
1584 1da177e4SLinus Torvalds# modules.
1585 1da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
1586 1da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
1587 1da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
1588 1da177e4SLinus Torvalds# make M=dir modules_install
1589 070b98bfSSam Ravnborg#                      Install the modules built in the module directory
1590 1da177e4SLinus Torvalds#                      Assumes install directory is already created
1591 1da177e4SLinus Torvalds
1592 1da177e4SLinus Torvalds# We are always building modules
1593 1da177e4SLinus TorvaldsKBUILD_MODULES := 1
1594 1da177e4SLinus Torvalds
1595 4f193362SPaul SmithPHONY += $(objtree)/Module.symvers
1596 1da177e4SLinus Torvalds$(objtree)/Module.symvers:
1597 1da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
1598 1da177e4SLinus Torvalds	echo; \
1599 1da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1600 1da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
1601 1da177e4SLinus Torvalds	echo )
1602 1da177e4SLinus Torvalds
1603 c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1604 c99f3918SMasahiro YamadaPHONY += modules
1605 c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers
1606 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1607 1da177e4SLinus Torvalds
1608 4f193362SPaul SmithPHONY += modules_install
1609 a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1610 a67dc21aSSam Ravnborg
1611 a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1612 4f193362SPaul SmithPHONY += _emodinst_
1613 a67dc21aSSam Ravnborg_emodinst_:
1614 a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1615 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1616 1da177e4SLinus Torvalds
1617 4f193362SPaul SmithPHONY += _emodinst_post
1618 a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1619 a67dc21aSSam Ravnborg	$(call cmd,depmod)
1620 a67dc21aSSam Ravnborg
1621 76cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
1622 88d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1623 1da177e4SLinus Torvalds
1624 d4945049SMasahiro YamadaPHONY += /
1625 d4945049SMasahiro Yamada/:
1626 d4945049SMasahiro Yamada	@echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1627 d4945049SMasahiro Yamada
1628 fe69b420SMasahiro YamadaPHONY += help
1629 1da177e4SLinus Torvaldshelp:
1630 1da177e4SLinus Torvalds	@echo  '  Building external modules.'
1631 1da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1632 1da177e4SLinus Torvalds	@echo  ''
1633 1da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
1634 1da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
1635 1da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
1636 1da177e4SLinus Torvalds	@echo  ''
1637 06300b21SSam Ravnborg
1638 059bc9fcSMasahiro YamadaPHONY += prepare
1639 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
1640 1da177e4SLinus Torvalds
1641 c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1642 c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1643 c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1644 c99f3918SMasahiro Yamada# make menuconfig etc.
1645 c99f3918SMasahiro Yamada# Error messages still appears in the original language
1646 c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1647 c99f3918SMasahiro Yamadadescend: $(build-dirs)
1648 c99f3918SMasahiro Yamada$(build-dirs): prepare
1649 394053f4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ single-build=$(single-build) need-builtin=1 need-modorder=1
1650 c99f3918SMasahiro Yamada
1651 76cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
1652 76cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
1653 76cd306dSMasahiro Yamada$(clean-dirs):
1654 76cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1655 76cd306dSMasahiro Yamada
1656 88d7be03SMichal Marekclean: $(clean-dirs)
1657 88d7be03SMichal Marek	$(call cmd,rmdirs)
1658 88d7be03SMichal Marek	$(call cmd,rmfiles)
1659 43f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1660 ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1661 4f0e3a57SRob Herring		-o -name '*.ko.*' \
1662 4f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1663 ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1664 1d082773SMatthias Maennich		-o -name '*.su' -o -name '*.mod' -o -name '*.ns_deps' \
1665 88d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1666 9a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
1667 4fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
1668 88d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
1669 88d7be03SMichal Marek		-o -name modules.builtin -o -name '.tmp_*.o.*' \
1670 6b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1671 433db3e2SVinícius Tinti		-o -name '*.ll' \
1672 88d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
1673 88d7be03SMichal Marek
1674 1da177e4SLinus Torvalds# Generate tags for editors
1675 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1676 a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1677 858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1678 1da177e4SLinus Torvalds
1679 f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
1680 1da177e4SLinus Torvalds	$(call cmd,tags)
1681 1da177e4SLinus Torvalds
1682 eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1683 eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1684 eb8305aeSMatthias Maennich
1685 eb8305aeSMatthias MaennichPHONY += nsdeps
1686 eb8305aeSMatthias Maennich
1687 eb8305aeSMatthias Maennichnsdeps: modules
1688 eb8305aeSMatthias Maennich	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost nsdeps
1689 eb8305aeSMatthias Maennich	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1690 eb8305aeSMatthias Maennich
1691 1da177e4SLinus Torvalds# Scripts to check various things for consistency
1692 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1693 1da177e4SLinus Torvalds
1694 279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1695 279f3dd3SPeter Foley
1696 1da177e4SLinus Torvaldsincludecheck:
1697 436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1698 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1699 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1700 1da177e4SLinus Torvalds
1701 1da177e4SLinus Torvaldsversioncheck:
1702 2ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1703 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1704 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1705 1da177e4SLinus Torvalds
1706 74425eeeSNicolas Palixcoccicheck:
1707 858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
1708 74425eeeSNicolas Palix
1709 1da177e4SLinus Torvaldsnamespacecheck:
1710 1da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
1711 1da177e4SLinus Torvalds
1712 295ac051SAdrian Bunkexport_report:
1713 295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1714 295ac051SAdrian Bunk
1715 c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1716 e3ccf6e3SJeff Dike
1717 011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1718 011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1719 011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1720 011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1721 011e3a9aSJeff Dikeifeq ($(ARCH), um)
1722 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1723 011e3a9aSJeff Dikeelse
1724 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1725 011e3a9aSJeff Dikeendif
1726 1da177e4SLinus Torvaldscheckstack:
1727 1da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1728 75dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1729 1da177e4SLinus Torvalds
1730 7b8ea53dSAmerigo Wangkernelrelease:
1731 7b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1732 01ab1788SAmerigo Wang
1733 cb58455cSSam Ravnborgkernelversion:
1734 2244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
1735 1da177e4SLinus Torvalds
1736 c398ff00SMike Marciniszynimage_name:
1737 c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1738 c398ff00SMike Marciniszyn
1739 ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1740 f47a23ceSMasahiro Yamada
1741 f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1742 f47a23ceSMasahiro Yamadatools_silent=s
1743 f47a23ceSMasahiro Yamadaendif
1744 f47a23ceSMasahiro Yamada
1745 ea01fa9fSBorislav Petkovtools/: FORCE
1746 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1747 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1748 ea01fa9fSBorislav Petkov
1749 ea01fa9fSBorislav Petkovtools/%: FORCE
1750 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1751 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1752 ea01fa9fSBorislav Petkov
1753 06300b21SSam Ravnborg# Single targets
1754 06300b21SSam Ravnborg# ---------------------------------------------------------------------------
1755 394053f4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1756 bc2546a6SSam Ravnborg#
1757 394053f4SMasahiro Yamada#   make foo/bar/baz.s
1758 394053f4SMasahiro Yamada#
1759 394053f4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1760 394053f4SMasahiro Yamada#
1761 394053f4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1762 394053f4SMasahiro Yamada#
1763 394053f4SMasahiro Yamada#   make foo/bar/baz/
1764 06300b21SSam Ravnborg
1765 394053f4SMasahiro Yamadaifdef single-build
1766 06300b21SSam Ravnborg
1767 394053f4SMasahiro Yamadasingle-all := $(filter $(single-targets), $(MAKECMDGOALS))
1768 394053f4SMasahiro Yamada
1769 394053f4SMasahiro Yamada# .ko is special because modpost is needed
1770 394053f4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(single-all)))
1771 394053f4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(single-all)))
1772 394053f4SMasahiro Yamada
1773 394053f4SMasahiro Yamada$(single-ko): single_modpost
1774 394053f4SMasahiro Yamada	@:
1775 394053f4SMasahiro Yamada$(single-no-ko): descend
1776 394053f4SMasahiro Yamada	@:
1777 394053f4SMasahiro Yamada
1778 47801c97SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1779 394053f4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1780 47801c97SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1781 394053f4SMasahiro YamadaMODORDER := .modules.tmp
1782 47801c97SMasahiro Yamadaendif
1783 394053f4SMasahiro Yamada
1784 394053f4SMasahiro YamadaPHONY += single_modpost
1785 394053f4SMasahiro Yamadasingle_modpost: $(single-no-ko)
1786 394053f4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1787 47801c97SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1788 bc2546a6SSam Ravnborg
1789 394053f4SMasahiro YamadaKBUILD_MODULES := 1
1790 6d3c94e4SMasahiro Yamada
1791 394053f4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1792 394053f4SMasahiro Yamada
1793 394053f4SMasahiro Yamadasingle-build = $(if $(filter-out $@/, $(single-no-ko)),1)
1794 394053f4SMasahiro Yamada
1795 394053f4SMasahiro Yamadaendif
1796 06300b21SSam Ravnborg
1797 1da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
1798 1da177e4SLinus Torvalds# ===========================================================================
1799 1da177e4SLinus Torvalds
1800 1da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1801 1da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
1802 1da177e4SLinus Torvalds
1803 1da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1804 1da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
1805 1da177e4SLinus Torvalds
1806 bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
1807 50a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1808 569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1809 5a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
1810 50a8ec31SSam Ravnborg
1811 392885eeSMasahiro Yamada# read saved command lines for existing targets
1812 392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
1813 1da177e4SLinus Torvalds
1814 b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
1815 1da177e4SLinus Torvalds
1816 2042b548SMasahiro Yamadaendif # config-targets
1817 2042b548SMasahiro Yamadaendif # mixed-build
1818 688931a5SMasahiro Yamadaendif # need-sub-make
1819 1da177e4SLinus Torvalds
1820 4f193362SPaul SmithPHONY += FORCE
1821 1da177e4SLinus TorvaldsFORCE:
1822 4f193362SPaul Smith
1823 bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1824 fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
1825 4f193362SPaul Smith.PHONY: $(PHONY)
1826