xref: /openbmc/linux/Makefile (revision 735aab1e008b6d9ba8057caa647b6619bf73460f)
1 b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2 bfeffd15SLinus TorvaldsVERSION = 5
3 bb6d3fb3SLinus TorvaldsPATCHLEVEL = 6
4 55922c9dSLinus TorvaldsSUBLEVEL = 0
5 98d54f81SLinus TorvaldsEXTRAVERSION = -rc4
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 $@ :<
68 066b7ed9SMichal Marek#
69 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
70 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
71 505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
72 066b7ed9SMichal Marek#
73 1da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
74 1da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
75 1da177e4SLinus Torvalds
76 1da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
77 1da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
78 1da177e4SLinus Torvaldsendif
79 1da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
80 1da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
81 1da177e4SLinus Torvaldsendif
82 1da177e4SLinus Torvalds
83 066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
84 066b7ed9SMichal Marek  quiet =
85 066b7ed9SMichal Marek  Q =
86 066b7ed9SMichal Marekelse
87 066b7ed9SMichal Marek  quiet=quiet_
88 066b7ed9SMichal Marek  Q = @
89 066b7ed9SMichal Marekendif
90 066b7ed9SMichal Marek
91 066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
92 066b7ed9SMichal Marek# commands
93 066b7ed9SMichal Marek
94 6f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
95 066b7ed9SMichal Marek  quiet=silent_
96 066b7ed9SMichal Marekendif
97 066b7ed9SMichal Marek
98 066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
99 066b7ed9SMichal Marek
100 25b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
101 25b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
102 25b146c5SMasahiro Yamada#
103 25b146c5SMasahiro Yamada# For example, you can do this:
104 25b146c5SMasahiro Yamada#
105 25b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
106 25b146c5SMasahiro Yamada#
107 25b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
108 25b146c5SMasahiro Yamada# two syntaxes to specify it.
109 25b146c5SMasahiro Yamada#
110 1da177e4SLinus Torvalds# 1) O=
111 1da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
112 1da177e4SLinus Torvalds#
113 1da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
114 25b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
115 25b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
116 1da177e4SLinus Torvalds#
117 1da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
118 1da177e4SLinus Torvalds# variable.
119 1da177e4SLinus Torvalds
120 25b146c5SMasahiro Yamada# Do we want to change the working directory?
121 1da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
122 1da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
123 1da177e4SLinus Torvaldsendif
124 1da177e4SLinus Torvalds
125 25b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
126 25b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
127 25b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
128 25b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
129 25b146c5SMasahiro Yamada$(if $(abs_objtree),, \
130 25b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
131 25b146c5SMasahiro Yamada
132 25b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
133 25b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
134 25b146c5SMasahiro Yamadaelse
135 25b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
136 25b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
137 25b146c5SMasahiro Yamada
138 25b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
139 25b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
140 25b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
141 25b146c5SMasahiro Yamadaelse
142 25b146c5SMasahiro Yamadaneed-sub-make := 1
143 51193b76SRobert Jarzmikendif
144 51193b76SRobert Jarzmik
145 25b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
146 1da177e4SLinus Torvalds
147 25b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
148 25b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
149 25b146c5SMasahiro Yamadaendif
150 25b146c5SMasahiro Yamada
151 25b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
152 80463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
153 80463f1bSMasahiro Yamada#
154 80463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
155 25b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
156 25b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
157 688931a5SMasahiro Yamadaneed-sub-make := 1
158 25b146c5SMasahiro Yamadaendif
159 3812b8c5SMasahiro Yamada
160 688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
161 688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
162 688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
163 688931a5SMasahiro Yamadaneed-sub-make := 1
164 688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
165 688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ;
166 688931a5SMasahiro Yamadaendif
167 688931a5SMasahiro Yamada
168 25b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
169 221cc2d2SMasahiro Yamadaexport sub_make_done := 1
170 221cc2d2SMasahiro Yamada
171 688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
172 688931a5SMasahiro Yamada
173 0b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
174 0b35786dSMilton Miller
175 0209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
176 16f89098SCharles Keepax	@:
177 0b35786dSMilton Miller
178 c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
179 2e8d696bSMasahiro Yamadasub-make:
180 25b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
181 1da177e4SLinus Torvalds
182 688931a5SMasahiro Yamadaendif # need-sub-make
183 221cc2d2SMasahiro Yamadaendif # sub_make_done
184 688931a5SMasahiro Yamada
185 1da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
186 688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
187 1da177e4SLinus Torvalds
188 7ff52571SMasahiro Yamada# Do not print "Entering directory ...",
189 7ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
190 7ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
191 7ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
192 7ff52571SMasahiro Yamada
193 aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
194 aa55c8e2SMasahiro Yamada# C compilation.
195 aa55c8e2SMasahiro Yamada#
196 aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
197 aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
198 aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
199 aa55c8e2SMasahiro Yamada#
200 036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
201 036db11cSCao jin# including where to get the "sparse" utility.
202 aa55c8e2SMasahiro Yamada
203 aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
204 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
205 aa55c8e2SMasahiro Yamadaendif
206 aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
207 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
208 aa55c8e2SMasahiro Yamadaendif
209 aa55c8e2SMasahiro Yamada
210 7e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
211 7e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
212 aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
213 aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
214 aa55c8e2SMasahiro Yamadaendif
215 aa55c8e2SMasahiro Yamada
216 051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD
217 051f278eSMasahiro Yamada
218 394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
219 394053f4SMasahiro Yamada
220 25b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
221 9da0763bSMichal Marek        # building in the source tree
222 9da0763bSMichal Marek        srctree := .
223 051f278eSMasahiro Yamada	building_out_of_srctree :=
224 9da0763bSMichal Marekelse
225 25b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
226 9da0763bSMichal Marek                # building in a subdirectory of the source tree
227 9da0763bSMichal Marek                srctree := ..
228 9da0763bSMichal Marek        else
229 25b146c5SMasahiro Yamada                srctree := $(abs_srctree)
230 9da0763bSMichal Marek        endif
231 051f278eSMasahiro Yamada	building_out_of_srctree := 1
232 9da0763bSMichal Marekendif
233 2c1f4f12SMasahiro Yamada
234 95fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
235 95fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
236 95fd3f87SMasahiro Yamadaendif
237 2c1f4f12SMasahiro Yamada
238 7e1c0477SMichal Marekobjtree		:= .
239 6b12de69SMasahiro YamadaVPATH		:= $(srctree)
240 1da177e4SLinus Torvalds
241 051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
242 1da177e4SLinus Torvalds
243 2c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
244 2c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
245 2c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
246 2c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
247 2c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
248 2c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
249 2c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
250 2c1f4f12SMasahiro Yamada
251 2c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
252 2c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
253 2c1f4f12SMasahiro Yamada
254 22340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
255 22340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
256 2c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
257 59b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
258 9dffecc1SMasahiro Yamada			 %asm-generic kernelversion %src-pkg dt_binding_check
259 a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \
260 a29d4d8cSMasahiro Yamada			   kernelrelease
261 394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
262 2c1f4f12SMasahiro Yamada
263 2042b548SMasahiro Yamadaconfig-build	:=
264 2042b548SMasahiro Yamadamixed-build	:=
265 2042b548SMasahiro Yamadaneed-config	:= 1
266 d7942413SMasahiro Yamadamay-sync-config	:= 1
267 394053f4SMasahiro Yamadasingle-build	:=
268 2c1f4f12SMasahiro Yamada
269 2c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
270 2c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
271 2042b548SMasahiro Yamada		need-config :=
272 2c1f4f12SMasahiro Yamada	endif
273 2c1f4f12SMasahiro Yamadaendif
274 2c1f4f12SMasahiro Yamada
275 d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
276 d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
277 2042b548SMasahiro Yamada		may-sync-config :=
278 d7942413SMasahiro Yamada	endif
279 d7942413SMasahiro Yamadaendif
280 d7942413SMasahiro Yamada
281 d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
282 2042b548SMasahiro Yamada	may-sync-config :=
283 d7942413SMasahiro Yamadaendif
284 d7942413SMasahiro Yamada
285 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
286 2c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
287 2042b548SMasahiro Yamada		config-build := 1
288 2c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
289 2042b548SMasahiro Yamada			mixed-build := 1
290 2c1f4f12SMasahiro Yamada                endif
291 2c1f4f12SMasahiro Yamada        endif
292 2c1f4f12SMasahiro Yamadaendif
293 22340a06SMasahiro Yamada
294 394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
295 394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
296 394053f4SMasahiro Yamada	single-build := 1
297 394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
298 394053f4SMasahiro Yamada		mixed-build := 1
299 394053f4SMasahiro Yamada	endif
300 394053f4SMasahiro Yamadaendif
301 394053f4SMasahiro Yamada
302 22340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
303 22340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
304 22340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
305 2042b548SMasahiro Yamada		mixed-build := 1
306 22340a06SMasahiro Yamada        endif
307 22340a06SMasahiro Yamadaendif
308 22340a06SMasahiro Yamada
309 2c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
310 2c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
311 2c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
312 2042b548SMasahiro Yamada		mixed-build := 1
313 2c1f4f12SMasahiro Yamada        endif
314 2c1f4f12SMasahiro Yamadaendif
315 2c1f4f12SMasahiro Yamada
316 2042b548SMasahiro Yamadaifdef mixed-build
317 2c1f4f12SMasahiro Yamada# ===========================================================================
318 2c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
319 2c1f4f12SMasahiro Yamada# Handle them one by one.
320 2c1f4f12SMasahiro Yamada
321 2c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
322 2c1f4f12SMasahiro Yamada
323 2c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
324 2c1f4f12SMasahiro Yamada	@:
325 2c1f4f12SMasahiro Yamada
326 2c1f4f12SMasahiro Yamada__build_one_by_one:
327 2c1f4f12SMasahiro Yamada	$(Q)set -e; \
328 2c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
329 2c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
330 2c1f4f12SMasahiro Yamada	done
331 2c1f4f12SMasahiro Yamada
332 2042b548SMasahiro Yamadaelse # !mixed-build
333 2c1f4f12SMasahiro Yamada
334 2c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
335 2c1f4f12SMasahiro Yamada
336 2c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
337 2c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
338 2c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
339 2c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
340 2c1f4f12SMasahiro Yamada
341 b2d35fa5SAnders Roxellinclude scripts/subarch.include
342 1da177e4SLinus Torvalds
343 1da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
344 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
345 1da177e4SLinus Torvalds#
346 1da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
347 1da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
348 1da177e4SLinus Torvalds# ARCH can be set during invocation of make:
349 1da177e4SLinus Torvalds# make ARCH=ia64
350 1da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
351 1da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
352 1da177e4SLinus Torvalds
353 1da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
354 1da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
355 1da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
356 1da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
357 1da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
358 1da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
359 1da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
360 1da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
361 2331d1a6SSam RavnborgARCH		?= $(SUBARCH)
362 1da177e4SLinus Torvalds
363 1da177e4SLinus Torvalds# Architecture as present in compile.h
364 1da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
365 6752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
366 1da177e4SLinus Torvalds
367 d746d647SSam Ravnborg# Additional ARCH settings for x86
368 d746d647SSam Ravnborgifeq ($(ARCH),i386)
369 d746d647SSam Ravnborg        SRCARCH := x86
370 d746d647SSam Ravnborgendif
371 d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
372 d746d647SSam Ravnborg        SRCARCH := x86
373 d746d647SSam Ravnborgendif
374 74b469f2SSam Ravnborg
375 5e538790SSam Ravnborg# Additional ARCH settings for sparc
376 e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
377 e69f58c0SNamhyung Kim       SRCARCH := sparc
378 e69f58c0SNamhyung Kimendif
379 a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
380 5e538790SSam Ravnborg       SRCARCH := sparc
381 a439fe51SSam Ravnborgendif
382 2fb9b1bdSSam Ravnborg
383 3cc000b5SPaul Mundt# Additional ARCH settings for sh
384 3cc000b5SPaul Mundtifeq ($(ARCH),sh64)
385 3cc000b5SPaul Mundt       SRCARCH := sh
386 3cc000b5SPaul Mundtendif
387 3cc000b5SPaul Mundt
388 14cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
389 41263fc6SBen Gardinerexport KCONFIG_CONFIG
390 14cdd3c4SRoman Zippel
391 2a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
392 2a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig
393 2a86f661SMasahiro Yamada
394 1da177e4SLinus Torvalds# SHELL used by kbuild
395 858805b3SMasahiro YamadaCONFIG_SHELL := sh
396 1da177e4SLinus Torvalds
397 6d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
398 6d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
399 6d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
400 d7f14c66SUwe Kleine-König
401 1da177e4SLinus TorvaldsHOSTCC       = gcc
402 1da177e4SLinus TorvaldsHOSTCXX      = g++
403 96f14fe7SLaura AbbottKBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
404 f92d19e0SLaura Abbott		-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
405 f92d19e0SLaura Abbott		$(HOSTCFLAGS)
406 *735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
407 f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
408 f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
409 1da177e4SLinus Torvalds
410 1da177e4SLinus Torvalds# Make variables (CC, etc...)
411 1da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
412 1da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
413 1da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
414 1da177e4SLinus TorvaldsCPP		= $(CC) -E
415 1da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
416 1da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
417 1da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
418 1da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
419 1da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
420 7bac9870SVasily GorbikOBJSIZE		= $(CROSS_COMPILE)size
421 eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
422 e83b9f55SAndrii NakryikoPAHOLE		= pahole
423 73a4f6dbSMasahiro YamadaLEX		= flex
424 73a4f6dbSMasahiro YamadaYACC		= bison
425 1da177e4SLinus TorvaldsAWK		= awk
426 caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
427 1da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
428 1da177e4SLinus TorvaldsPERL		= perl
429 011bf125SMasahiro YamadaPYTHON		= python
430 e9781b52SMasahiro YamadaPYTHON3		= python3
431 1da177e4SLinus TorvaldsCHECK		= sparse
432 858805b3SMasahiro YamadaBASH		= bash
433 1da177e4SLinus Torvalds
434 80a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
435 6c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
436 0c22be07SDouglas AndersonNOSTDINC_FLAGS :=
437 6588169dSSam RavnborgCFLAGS_MODULE   =
438 6588169dSSam RavnborgAFLAGS_MODULE   =
439 6588169dSSam RavnborgLDFLAGS_MODULE  =
440 1da177e4SLinus TorvaldsCFLAGS_KERNEL	=
441 1da177e4SLinus TorvaldsAFLAGS_KERNEL	=
442 b36fad65SMichal MarekLDFLAGS_vmlinux =
443 1da177e4SLinus Torvalds
444 abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
445 abbf1590SDavid HowellsUSERINCLUDE    := \
446 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
447 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
448 abbf1590SDavid Howells		-I$(srctree)/include/uapi \
449 3308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
450 abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
451 abbf1590SDavid Howells
452 1da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
453 1da177e4SLinus Torvalds# Needed to be compatible with the O= option
454 abbf1590SDavid HowellsLINUXINCLUDE    := \
455 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
456 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
457 051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
458 f8224f7fSMasahiro Yamada		-I$(objtree)/include \
459 f8224f7fSMasahiro Yamada		$(USERINCLUDE)
460 1da177e4SLinus Torvalds
461 42a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
462 eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
463 42a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
464 b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
465 51b97e35SKirill A. Shutemov		   -Wno-format-security \
466 433dc2ebSMasahiro Yamada		   -std=gnu89
467 433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
468 80c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
469 80c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
470 6588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
471 6588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
472 10df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
473 10df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
474 d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
475 433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
476 5241ab4cSMasahiro YamadaCLANG_FLAGS :=
477 1da177e4SLinus Torvalds
478 858805b3SMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
479 eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
480 94f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
481 7bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
482 1da177e4SLinus Torvalds
483 d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
484 0e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
485 0e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
486 222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
487 6588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
488 80c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
489 1da177e4SLinus Torvalds
490 1da177e4SLinus Torvalds# Files to ignore in find ... statements
491 1da177e4SLinus Torvalds
492 ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
493 ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
494 ae63b2d7SPrarit Bhargava			  -prune -o
495 450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
496 450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
497 1da177e4SLinus Torvalds
498 1da177e4SLinus Torvalds# ===========================================================================
499 1da177e4SLinus Torvalds# Rules shared between *config targets and build targets
500 1da177e4SLinus Torvalds
501 312a3d09SCao jin# Basic helpers built in scripts/basic/
502 4f193362SPaul SmithPHONY += scripts_basic
503 1da177e4SLinus Torvaldsscripts_basic:
504 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
505 638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
506 1da177e4SLinus Torvalds
507 4f193362SPaul SmithPHONY += outputmakefile
508 e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
509 fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
510 fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
511 fd5f0cd6SJan Beulich# output directory.
512 3a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
513 3a51ff34SVladimir Kondratiev# ignore whole output directory
514 1da177e4SLinus Torvaldsoutputmakefile:
515 051f278eSMasahiro Yamadaifdef building_out_of_srctree
516 e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
517 e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
518 e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
519 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
520 e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
521 e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
522 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
523 e8e83a23SMasahiro Yamada		false; \
524 e8e83a23SMasahiro Yamada	fi
525 92979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
526 4fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
527 156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
528 156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
529 fd5f0cd6SJan Beulichendif
530 1da177e4SLinus Torvalds
531 99516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
532 ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
533 5241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
534 ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
535 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)
536 ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
537 ae6b289aSChris Friesendif
538 ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
539 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
540 ae6b289aSChris Friesendif
541 876a0600SNathan Chancellorifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),)
542 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
543 876a0600SNathan Chancellorendif
544 589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
545 238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
546 238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
547 3bd98050SJoel Stanleyexport CLANG_FLAGS
548 ae6b289aSChris Friesendif
549 ae6b289aSChris Fries
550 315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
551 315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
552 315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
553 315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
554 902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
555 315bab4eSMasahiro Yamada
556 2042b548SMasahiro Yamadaifdef config-build
557 1da177e4SLinus Torvalds# ===========================================================================
558 1da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
559 1da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
560 1da177e4SLinus Torvalds
561 1da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
562 1da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
563 1da177e4SLinus Torvalds# used for 'make defconfig'
564 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
565 315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
566 1da177e4SLinus Torvalds
567 36de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
568 31110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
569 31110ebbSSam Ravnborg
570 36de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
571 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
572 1da177e4SLinus Torvalds
573 2042b548SMasahiro Yamadaelse #!config-build
574 1da177e4SLinus Torvalds# ===========================================================================
575 1da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
576 1da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
577 1da177e4SLinus Torvalds
578 2c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
579 2c1f4f12SMasahiro Yamada# but instead _all depend on modules
580 2c1f4f12SMasahiro YamadaPHONY += all
581 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
582 2c1f4f12SMasahiro Yamada_all: all
583 2c1f4f12SMasahiro Yamadaelse
584 2c1f4f12SMasahiro Yamada_all: modules
585 2c1f4f12SMasahiro Yamadaendif
586 2c1f4f12SMasahiro Yamada
587 2c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
588 2c1f4f12SMasahiro Yamada# Normally, just do built-in.
589 2c1f4f12SMasahiro Yamada
590 2c1f4f12SMasahiro YamadaKBUILD_MODULES :=
591 2c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
592 2c1f4f12SMasahiro Yamada
593 2c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
594 2c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider
595 2c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to
596 2c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them.
597 2c1f4f12SMasahiro Yamada
598 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
599 2c1f4f12SMasahiro Yamada  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
600 2c1f4f12SMasahiro Yamadaendif
601 2c1f4f12SMasahiro Yamada
602 2c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
603 2c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
604 2c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
605 2c1f4f12SMasahiro Yamada
606 d85103acSMasahiro Yamadaifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
607 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
608 2c1f4f12SMasahiro Yamadaendif
609 2c1f4f12SMasahiro Yamada
610 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
611 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
612 2c1f4f12SMasahiro Yamadaendif
613 2c1f4f12SMasahiro Yamada
614 2c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
615 2c1f4f12SMasahiro Yamada
616 2042b548SMasahiro Yamadaifdef need-config
617 d93a18f2SMasahiro Yamadainclude include/config/auto.conf
618 d93a18f2SMasahiro Yamadaendif
619 d93a18f2SMasahiro Yamada
620 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
621 1da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
622 1da177e4SLinus Torvaldsinit-y		:= init/
623 f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
624 d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
625 1da177e4SLinus Torvaldsnet-y		:= net/
626 1da177e4SLinus Torvaldslibs-y		:= lib/
627 1da177e4SLinus Torvaldscore-y		:= usr/
628 37d9fe47SFeng Wuvirt-y		:= virt/
629 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
630 1da177e4SLinus Torvalds
631 315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
632 315bab4eSMasahiro Yamada# command line.
633 315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
634 315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
635 315bab4eSMasahiro Yamadaall: vmlinux
636 315bab4eSMasahiro Yamada
637 315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
638 315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
639 315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
640 5aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
641 315bab4eSMasahiro Yamada
642 b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
643 b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
644 b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
645 b1f4ff74SPaulo Zanoniendif
646 b1f4ff74SPaulo Zanoni
647 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
648 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
649 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
650 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
651 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
652 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
653 669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
654 669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
655 669e06b1SMasahiro Yamada
656 315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
657 315bab4eSMasahiro Yamada
658 2042b548SMasahiro Yamadaifdef need-config
659 2042b548SMasahiro Yamadaifdef may-sync-config
660 315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
661 315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
662 315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
663 d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
664 1da177e4SLinus Torvalds
665 05850719SMasahiro Yamada$(KCONFIG_CONFIG):
666 05850719SMasahiro Yamada	@echo >&2 '***'
667 05850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
668 05850719SMasahiro Yamada	@echo >&2 '***'
669 05850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
670 05850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
671 05850719SMasahiro Yamada	@echo >&2 '***'
672 05850719SMasahiro Yamada	@/bin/false
673 1da177e4SLinus Torvalds
674 61277981SUlf Magnusson# The actual configuration files used during the build are stored in
675 61277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
676 61277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
677 9390dff6SMasahiro Yamada#
678 9390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
679 9390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
680 8b41fc44SMasahiro Yamada%/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG)
681 911a91c3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
682 2042b548SMasahiro Yamadaelse # !may-sync-config
683 d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
684 d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
685 d7942413SMasahiro Yamada# Use auto.conf to trigger the test
686 9ee4e336SSam RavnborgPHONY += include/config/auto.conf
687 9ee4e336SSam Ravnborg
688 9ee4e336SSam Ravnborginclude/config/auto.conf:
689 264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
690 5369f550SMichal Marek	echo >&2;							\
691 5369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
692 5369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
693 5369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
694 5369f550SMichal Marek	echo >&2 ;							\
695 9ee4e336SSam Ravnborg	/bin/false)
696 9ee4e336SSam Ravnborg
697 d7942413SMasahiro Yamadaendif # may-sync-config
698 2042b548SMasahiro Yamadaendif # need-config
699 1da177e4SLinus Torvalds
700 a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
701 ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
702 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
703 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
704 6f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
705 a1c48bb1SGeert Uytterhoeven
706 15f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
707 a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
708 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
709 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
710 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
711 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
712 1da177e4SLinus Torvaldsendif
713 1da177e4SLinus Torvalds
714 b303c6dfSMasahiro Yamadaifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
715 b303c6dfSMasahiro YamadaKBUILD_CFLAGS   += -Wno-maybe-uninitialized
716 b303c6dfSMasahiro Yamadaendif
717 a76bcf55SArnd Bergmann
718 69102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
719 69102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
720 b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
721 69102311SJiri Kosina
722 d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov
723 6b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
724 6b90bd4bSEmese Revfy
725 1873e870SAndi Kleenifdef CONFIG_READABLE_ASM
726 1873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
727 1873e870SAndi Kleen# reorder blocks reorders the control in the function
728 1873e870SAndi Kleen# ipa clone creates specialized cloned functions
729 1873e870SAndi Kleen# partial inlining inlines only parts of functions
730 1873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
731 1873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
732 1873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
733 1873e870SAndi Kleenendif
734 1873e870SAndi Kleen
735 08f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
736 a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
737 35bb5b1eSAndi Kleenendif
738 35bb5b1eSAndi Kleen
739 2a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
740 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
741 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
742 2a61f474SMasahiro Yamada
743 2a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
744 e06b8b98SSam Ravnborg
745 076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
746 a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
747 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
748 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
749 cfe17c9bSMasahiro Yamada# Quiet clang warning: comparison of unsigned expression < 0 is always false
750 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-tautological-compare
751 cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
752 cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
753 cfe17c9bSMasahiro Yamada# See modpost pattern 2
754 a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
755 cfe17c9bSMasahiro Yamadaelse
756 cfe17c9bSMasahiro Yamada
757 cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
758 cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
759 9df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
760 e2079e93SNathan Chancellor
761 e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
762 e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
763 e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
764 e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
765 cfe17c9bSMasahiro Yamadaendif
766 cfe17c9bSMasahiro Yamada
767 0a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
768 1da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
769 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
770 1da177e4SLinus Torvaldselse
771 7e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
772 7e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
773 7e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
774 7e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
775 7e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
776 7e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
777 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
778 1da177e4SLinus Torvaldsendif
779 7e9501fdSRabin Vincentendif
780 1da177e4SLinus Torvalds
781 709a972eSKees Cook# Initialize all stack variables with a pattern, if desired.
782 709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL
783 709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
784 709a972eSKees Cookendif
785 709a972eSKees Cook
786 1e88e415SMasahiro YamadaDEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
787 2062afb4SLinus Torvalds
788 1da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
789 866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
790 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
791 866ced95SAndi Kleenelse
792 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
793 866ced95SAndi Kleenendif
794 2288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
795 1da177e4SLinus Torvaldsendif
796 bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
797 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
798 bfaf2dd3SAndi Kleenendif
799 1da177e4SLinus Torvalds
800 d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
801 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
802 e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
803 d6f4ceb7SAndi Kleenendif
804 d6f4ceb7SAndi Kleen
805 1e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
806 1e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
807 1e88e415SMasahiro Yamada
808 606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
809 07d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
810 07d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
811 07d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
812 07d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
813 07d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
814 a2546faeSSteven Rostedt  endif
815 2f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
816 2f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
817 2f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
818 2f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
819 2f4df001SVasily Gorbik    endif
820 2f4df001SVasily Gorbik  endif
821 07d04081SVasily Gorbikendif
822 a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
823 f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
824 f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
825 f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
826 a2546faeSSteven Rostedt  endif
827 f28bc3c3SVasily Gorbikendif
828 f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
829 f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
830 f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
831 72441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
832 cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
833 72441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
834 72441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
835 72441cb1SSteven Rostedt	endif
836 72441cb1SSteven Rostedtendif
837 16444a8aSArnaldo Carvalho de Meloendif
838 16444a8aSArnaldo Carvalho de Melo
839 91341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
840 91341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
841 91341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
842 91341d4bSSam Ravnborgendif
843 91341d4bSSam Ravnborg
844 90ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
845 e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
846 e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
847 90ad4052SMasahiro Yamadaendif
848 90ad4052SMasahiro Yamada
849 43bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH
850 43bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
851 43bd3a95SMiroslav Benesendif
852 43bd3a95SMiroslav Benes
853 e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
854 e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
855 e8e69931SSam Ravnborg
856 1da177e4SLinus Torvalds# warn about C99 declaration after statement
857 a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
858 1da177e4SLinus Torvalds
859 0bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
860 8289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
861 0bb95f80SKees Cook
862 070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
863 fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
864 1da177e4SLinus Torvalds
865 217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
866 217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
867 217c3e01SStephen Rothwell
868 fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
869 a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
870 d0115552SLinus Torvalds
871 87e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this
872 87e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we
873 87e0d4f0SDaniel Borkmann# need to disable it here generally.
874 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fno-merge-all-constants)
875 87e0d4f0SDaniel Borkmann
876 87e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine
877 87e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled.
878 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fmerge-constants)
879 87e0d4f0SDaniel Borkmann
880 3ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
881 3ce120b1SLinus TorvaldsKBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
882 3ce120b1SLinus Torvalds
883 8f7f5c9fSAndi Kleen# conserve stack if available
884 8f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
885 8f7f5c9fSAndi Kleen
886 fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
887 fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
888 fe7c36c7SJosh Triplett
889 ea8daa7bSDaniel Wagner# enforce correct pointer usage
890 ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
891 ea8daa7bSDaniel Wagner
892 c834f0e8SKees Cook# Require designated initializers for all marked structures
893 c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
894 c834f0e8SKees Cook
895 a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
896 a73619a8SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
897 a73619a8SMasahiro Yamada
898 29be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is
899 29be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern
900 29be86d7SSeth Forsheeifdef CONFIG_RETPOLINE
901 29be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
902 29be86d7SSeth Forsheeendif
903 29be86d7SSeth Forshee
904 a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
905 a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
906 c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
907 a86fe353SMasahiro Yamada
908 8cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
909 8cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
910 8cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
911 8cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
912 52bcc330SSam Ravnborg
913 89ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id
914 89ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id
915 18991197SRoland McGrath
916 5d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
917 d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
918 5d7d18f5SDavid Howellsendif
919 5d7d18f5SDavid Howells
920 5cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
921 5cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
922 5cf896fbSPeter Collingbourneendif
923 5cf896fbSPeter Collingbourne
924 80591e61SLuc Van Oostenryck# make the checker run with the right architecture
925 80591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
926 80591e61SLuc Van Oostenryck
927 14516765SLuc Van Oostenryck# insure the checker run with the right endianness
928 14516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
929 14516765SLuc Van Oostenryck
930 1f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
931 1f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
932 1f2f01b1SLuc Van Oostenryck
933 1da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
934 1da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
935 1da177e4SLinus Torvalds# set in the environment
936 1da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
937 1da177e4SLinus Torvalds# this default value
938 1da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
939 1da177e4SLinus Torvalds
940 1da177e4SLinus Torvalds#
941 1da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
942 1da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
943 1da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
944 1da177e4SLinus Torvalds
945 1da177e4SLinus Torvalds#
946 f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
947 f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
948 f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
949 f4d4ffc0SJason Cooper#
950 f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
951 f4d4ffc0SJason Cooper
952 f4d4ffc0SJason Cooper#
953 1da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
954 1da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
955 070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
956 1da177e4SLinus Torvalds#
957 1da177e4SLinus Torvalds
958 df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
959 1da177e4SLinus Torvaldsexport MODLIB
960 1da177e4SLinus Torvalds
961 ac031f26STheodore Ts'o#
962 2ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
963 2ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
964 2ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
965 177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
966 2ea03891SSam Ravnborg
967 ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
968 ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
969 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
970 ac031f26STheodore Ts'oelse
971 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
972 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
973 ac031f26STheodore Ts'oelse
974 2ea03891SSam Ravnborgmod_strip_cmd = true
975 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
976 ac031f26STheodore Ts'oexport mod_strip_cmd
977 ac031f26STheodore Ts'o
978 beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
979 beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
980 beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
981 beb50df3SBertrand Jacquin
982 beb50df3SBertrand Jacquinmod_compress_cmd = true
983 beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
984 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
985 3d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
986 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
987 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
988 3d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
989 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
990 beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
991 beb50df3SBertrand Jacquinexport mod_compress_cmd
992 beb50df3SBertrand Jacquin
993 d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
994 3ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
995 3ee550f1SDavid Woodhouse
996 3ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
997 e2a666d5SRusty Russellelse
998 e2a666d5SRusty Russellmod_sign_cmd = true
999 e2a666d5SRusty Russellendif
1000 e2a666d5SRusty Russellexport mod_sign_cmd
1001 e2a666d5SRusty Russell
1002 056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1003 056d28d1SRolf Eike Beer
1004 9f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
1005 9f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
1006 056d28d1SRolf Eike Beer		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1007 9f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
1008 9f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
1009 9f0c18aeSJosh Poimboeuf  else
1010 9f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
1011 9f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
1012 9f0c18aeSJosh Poimboeuf  endif
1013 9f0c18aeSJosh Poimboeufendif
1014 9f0c18aeSJosh Poimboeuf
1015 e00d8880SMasahiro YamadaPHONY += prepare0
1016 e2a666d5SRusty Russell
1017 394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
1018 bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
1019 47801c97SMasahiro Yamada
1020 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1021 cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1022 1da177e4SLinus Torvalds
1023 1da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
1024 1da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
1025 37d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
1026 1da177e4SLinus Torvalds
1027 1eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
1028 1eaca4b9SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
1029 1eaca4b9SMasahiro Yamada			$(drivers-) $(net-) $(libs-) $(virt-))))
1030 1da177e4SLinus Torvalds
1031 c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
1032 76cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1033 c99f3918SMasahiro Yamada
1034 f49821eeSNicholas Piggininit-y		:= $(patsubst %/, %/built-in.a, $(init-y))
1035 f49821eeSNicholas Piggincore-y		:= $(patsubst %/, %/built-in.a, $(core-y))
1036 f49821eeSNicholas Piggindrivers-y	:= $(patsubst %/, %/built-in.a, $(drivers-y))
1037 f49821eeSNicholas Pigginnet-y		:= $(patsubst %/, %/built-in.a, $(net-y))
1038 1da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
1039 f49821eeSNicholas Pigginlibs-y2		:= $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
1040 f49821eeSNicholas Pigginvirt-y		:= $(patsubst %/, %/built-in.a, $(virt-y))
1041 1da177e4SLinus Torvalds
1042 1f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1043 d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
1044 d151e971SMasahiro Yamada			      $(drivers-y) $(net-y) $(virt-y)
1045 3a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1)
1046 95698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
1047 1f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
1048 85f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1049 233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
1050 1da177e4SLinus Torvalds
1051 d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1052 1da177e4SLinus Torvalds
1053 3fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
1054 3fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
1055 2441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
1056 c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order
1057 ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1058 86556392SNicolas Pitre	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
1059 2441e78bSNicolas Pitreendif
1060 23121ca2SNicolas Pitre
1061 1f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
1062 1f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
1063 1f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
1064 1f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS
1065 1f50b80aSMasahiro Yamada  KBUILD_MODULES := 1
1066 1f50b80aSMasahiro Yamadaendif
1067 1f50b80aSMasahiro Yamada
1068 07a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1069 07a422bbSMasahiro Yamada
1070 88694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
1071 88694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
1072 88694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
1073 88694cffSQuentin Perret
1074 07a422bbSMasahiro Yamada$(autoksyms_h):
1075 88694cffSQuentin Perret	$(call cmd,autoksyms_h)
1076 23121ca2SNicolas Pitre
1077 fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1078 fbe6e37dSNicholas Piggin
1079 fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1080 fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
1081 d503ac53SMasahiro Yamada	$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
1082 fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1083 2441e78bSNicolas Pitre
1084 3fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1085 1f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1086 741f98feSSam Ravnborg
1087 392885eeSMasahiro Yamadatargets := vmlinux
1088 392885eeSMasahiro Yamada
1089 1da177e4SLinus Torvalds# The actual objects are generated when descending,
1090 1da177e4SLinus Torvalds# make sure no implicit rule kicks in
1091 c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ;
1092 1da177e4SLinus Torvalds
1093 ba97df45SMasahiro Yamadafilechk_kernel.release = \
1094 0d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1095 0d0e7718SMichal Marek
1096 83a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
1097 24512795SMasahiro Yamadainclude/config/kernel.release: FORCE
1098 0d0e7718SMichal Marek	$(call filechk,kernel.release)
1099 cb58455cSSam Ravnborg
1100 d8821622SMasahiro Yamada# Additional helpers built in scripts/
1101 d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1102 d8821622SMasahiro Yamada# in parallel
1103 d8821622SMasahiro YamadaPHONY += scripts
1104 60df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1105 d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1106 cb58455cSSam Ravnborg
1107 1da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
1108 5bb78269SSam Ravnborg# or the modules are listed in "prepare".
1109 5bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
1110 5bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
1111 5bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
1112 1da177e4SLinus Torvalds
1113 a5139fb3SMasahiro YamadaPHONY += prepare archprepare
1114 5bb78269SSam Ravnborg
1115 36de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1116 30527cefSMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
1117 5bb78269SSam Ravnborg
1118 65bba042SMasahiro Yamadaprepare0: archprepare
1119 60df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
1120 8d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
1121 86feeaa8SSam Ravnborg
1122 1da177e4SLinus Torvalds# All the preparing..
1123 b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1124 b9ab5ebbSJosh Poimboeuf
1125 2c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
1126 7d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1127 7d0e5c20SMasahiro Yamada
1128 2c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
1129 2c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1130 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1131 037fc336SMasahiro Yamada	generic=include/asm-generic
1132 2c1f4f12SMasahiro Yamadauapi-asm-generic:
1133 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1134 037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
1135 2c1f4f12SMasahiro Yamada
1136 b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
1137 3b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1138 ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1139 ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1140 ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1141 ef7cfd00SMasahiro Yamada	@false
1142 ef7cfd00SMasahiro Yamadaelse
1143 ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1144 ef7cfd00SMasahiro Yamadaendif
1145 ef7cfd00SMasahiro Yamadaendif
1146 1da177e4SLinus Torvalds
1147 1da177e4SLinus Torvalds# Generate some files
1148 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1149 1da177e4SLinus Torvalds
1150 1da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
1151 1da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
1152 1da177e4SLinus Torvalds
1153 1da177e4SLinus Torvaldsuts_len := 64
1154 63104eecSSam Ravnborgdefine filechk_utsrelease.h
1155 1da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1156 1da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1157 1da177e4SLinus Torvalds	  exit 1;                                                         \
1158 1da177e4SLinus Torvalds	fi;                                                               \
1159 ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1160 1da177e4SLinus Torvaldsendef
1161 1da177e4SLinus Torvalds
1162 63104eecSSam Ravnborgdefine filechk_version.h
1163 ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
1164 78d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1165 ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1166 63104eecSSam Ravnborgendef
1167 63104eecSSam Ravnborg
1168 43fee2b2SMasahiro Yamada$(version_h): FORCE
1169 1da177e4SLinus Torvalds	$(call filechk,version.h)
1170 223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
1171 1da177e4SLinus Torvalds
1172 273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
1173 63104eecSSam Ravnborg	$(call filechk,utsrelease.h)
1174 63104eecSSam Ravnborg
1175 179efcb4SVegard NossumPHONY += headerdep
1176 179efcb4SVegard Nossumheaderdep:
1177 9663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1178 9663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1179 179efcb4SVegard Nossum
1180 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1181 8d730cfbSDavid Woodhouse# Kernel headers
1182 8d730cfbSDavid Woodhouse
1183 e6883b18SSam Ravnborg#Default location for installed headers
1184 e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1185 e6883b18SSam Ravnborg
1186 59b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1187 59b2bd05SMasahiro Yamada      cmd_headers_install = \
1188 59b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
1189 59b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1190 59b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
1191 6d716275SDavid Woodhouse
1192 8d730cfbSDavid WoodhousePHONY += headers_install
1193 59b2bd05SMasahiro Yamadaheaders_install: headers
1194 59b2bd05SMasahiro Yamada	$(call cmd,headers_install)
1195 4f193362SPaul Smith
1196 1da177e4SLinus TorvaldsPHONY += archheaders archscripts
1197 1da177e4SLinus Torvalds
1198 a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1199 1da177e4SLinus Torvalds
1200 59b2bd05SMasahiro YamadaPHONY += headers
1201 59b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1202 9d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1203 2fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1204 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1205 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1206 1f85712eSMike Frysinger
1207 7ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
1208 68475359SDavid WoodhousePHONY += headers_check
1209 7ecaf069SMasahiro Yamadaheaders_check:
1210 7ecaf069SMasahiro Yamada	@:
1211 68475359SDavid Woodhouse
1212 e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
1213 59b2bd05SMasahiro Yamadaprepare: headers
1214 e949f4c2SMasahiro Yamadaendif
1215 1da177e4SLinus Torvalds
1216 bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1217 bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1218 bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1219 bdd7714bSMasahiro Yamada
1220 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1221 5a5da78bSShuah Khan# Kernel selftest
1222 5a5da78bSShuah Khan
1223 5a5da78bSShuah KhanPHONY += kselftest
1224 5a5da78bSShuah Khankselftest:
1225 2bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1226 5a5da78bSShuah Khan
1227 17eac6c2SShuah Khankselftest-%: FORCE
1228 17eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1229 dcb825a9SWang Long
1230 3d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
1231 3d6dee7aSBamvor Jian Zhangkselftest-merge:
1232 3d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1233 6d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
1234 6d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1235 3e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1236 3d6dee7aSBamvor Jian Zhang
1237 5a5da78bSShuah Khan# ---------------------------------------------------------------------------
1238 37c8a5faSRob Herring# Devicetree files
1239 37c8a5faSRob Herring
1240 37c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1241 37c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
1242 37c8a5faSRob Herringendif
1243 37c8a5faSRob Herring
1244 37c8a5faSRob Herringifneq ($(dtstree),)
1245 37c8a5faSRob Herring
1246 a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
1247 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1248 37c8a5faSRob Herring
1249 c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1250 b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
1251 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
1252 37c8a5faSRob Herring
1253 b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1254 e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1255 b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1256 b5154bf6SMasahiro Yamadaendif
1257 b5154bf6SMasahiro Yamada
1258 b5154bf6SMasahiro Yamadadtbs_check: dtbs
1259 4f0e3a57SRob Herring
1260 37c8a5faSRob Herringdtbs_install:
1261 2431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1262 37c8a5faSRob Herring
1263 37c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
1264 37c8a5faSRob Herringall: dtbs
1265 37c8a5faSRob Herringendif
1266 37c8a5faSRob Herring
1267 37c8a5faSRob Herringendif
1268 37c8a5faSRob Herring
1269 37c8a5faSRob HerringPHONY += scripts_dtc
1270 37c8a5faSRob Herringscripts_dtc: scripts_basic
1271 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
1272 37c8a5faSRob Herring
1273 e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1274 e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1275 e10c4321SMasahiro Yamadaendif
1276 e10c4321SMasahiro Yamada
1277 c473a8d0SMasahiro YamadaPHONY += dt_binding_check
1278 4f0e3a57SRob Herringdt_binding_check: scripts_dtc
1279 4f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1280 4f0e3a57SRob Herring
1281 37c8a5faSRob Herring# ---------------------------------------------------------------------------
1282 1da177e4SLinus Torvalds# Modules
1283 1da177e4SLinus Torvalds
1284 1da177e4SLinus Torvaldsifdef CONFIG_MODULES
1285 1da177e4SLinus Torvalds
1286 1da177e4SLinus Torvalds# By default, build modules as well
1287 1da177e4SLinus Torvalds
1288 73d1393eSMichal Marekall: modules
1289 1da177e4SLinus Torvalds
1290 1da177e4SLinus Torvalds# Build modules
1291 551559e1STejun Heo#
1292 551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1293 551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1294 551559e1STejun Heo# using awk while concatenating to the final file.
1295 1da177e4SLinus Torvalds
1296 4f193362SPaul SmithPHONY += modules
1297 8b41fc44SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order
1298 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1299 3a48a919SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
1300 1da177e4SLinus Torvalds
1301 c99f3918SMasahiro Yamadamodules.order: descend
1302 c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1303 a6c36632SMichal Marek
1304 1da177e4SLinus Torvalds# Target to prepare building external modules
1305 4f193362SPaul SmithPHONY += modules_prepare
1306 059bc9fcSMasahiro Yamadamodules_prepare: prepare
1307 1da177e4SLinus Torvalds
1308 1da177e4SLinus Torvalds# Target to install modules
1309 4f193362SPaul SmithPHONY += modules_install
1310 1da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
1311 1da177e4SLinus Torvalds
1312 4f193362SPaul SmithPHONY += _modinst_
1313 2da30e70SMichal Marek_modinst_:
1314 1da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
1315 1da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
1316 1da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
1317 8e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
1318 1da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1319 1da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
1320 7e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
1321 1da177e4SLinus Torvalds	fi
1322 1bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
1323 8b41fc44SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
1324 898490c0SAlexey Gladkov	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1325 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1326 1da177e4SLinus Torvalds
1327 50a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
1328 1da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
1329 1da177e4SLinus Torvalds# boot script depmod is the master version.
1330 4f193362SPaul SmithPHONY += _modinst_post
1331 6d128e1eSLinus Torvalds_modinst_post: _modinst_
1332 50a8ec31SSam Ravnborg	$(call cmd,depmod)
1333 1da177e4SLinus Torvalds
1334 d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1335 d890f510SJosh BoyerPHONY += modules_sign
1336 d890f510SJosh Boyermodules_sign:
1337 d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1338 d890f510SJosh Boyerendif
1339 d890f510SJosh Boyer
1340 1da177e4SLinus Torvaldselse # CONFIG_MODULES
1341 1da177e4SLinus Torvalds
1342 1da177e4SLinus Torvalds# Modules not configured
1343 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1344 1da177e4SLinus Torvalds
1345 612e47ceSMasahiro YamadaPHONY += modules modules_install
1346 612e47ceSMasahiro Yamadamodules modules_install:
1347 5369f550SMichal Marek	@echo >&2
1348 5369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
1349 5369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
1350 5369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
1351 5369f550SMichal Marek	@echo >&2
1352 1da177e4SLinus Torvalds	@exit 1
1353 1da177e4SLinus Torvalds
1354 1da177e4SLinus Torvaldsendif # CONFIG_MODULES
1355 1da177e4SLinus Torvalds
1356 1da177e4SLinus Torvalds###
1357 1da177e4SLinus Torvalds# Cleaning is done on three levels.
1358 1da177e4SLinus Torvalds# make clean     Delete most generated files
1359 1da177e4SLinus Torvalds#                Leave enough to build external modules
1360 1da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
1361 1da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
1362 1da177e4SLinus Torvalds
1363 1da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1364 b7dca6ddSMasahiro YamadaCLEAN_DIRS  += include/ksym
1365 8b41fc44SMasahiro YamadaCLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps
1366 1da177e4SLinus Torvalds
1367 1da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1368 d6fc9fcbSMasahiro YamadaMRPROPER_DIRS  += include/config include/generated          \
1369 46a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
1370 46a63d4bSMasahiro Yamada		  debian/ snap/ tar-install/
1371 278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \
1372 46457133SMasahiro Yamada		  Module.symvers \
1373 fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1374 fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
1375 46a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
1376 46a63d4bSMasahiro Yamada		  *.spec
1377 1da177e4SLinus Torvalds
1378 46457133SMasahiro Yamada# Directories & files removed with 'make distclean'
1379 46457133SMasahiro YamadaDISTCLEAN_DIRS  +=
1380 46457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1381 46457133SMasahiro Yamada
1382 1da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
1383 1da177e4SLinus Torvalds#
1384 1da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
1385 1da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1386 1da177e4SLinus Torvalds
1387 76cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
1388 1da177e4SLinus Torvalds
1389 bd1ee804SPawel Mollvmlinuxclean:
1390 bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1391 fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1392 bd1ee804SPawel Moll
1393 bd1ee804SPawel Mollclean: archclean vmlinuxclean
1394 1da177e4SLinus Torvalds
1395 1da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
1396 1da177e4SLinus Torvalds#
1397 1da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1398 1da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1399 cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
1400 1da177e4SLinus Torvalds
1401 b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
1402 1da177e4SLinus Torvalds$(mrproper-dirs):
1403 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1404 1da177e4SLinus Torvalds
1405 b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
1406 1da177e4SLinus Torvalds	$(call cmd,rmdirs)
1407 1da177e4SLinus Torvalds	$(call cmd,rmfiles)
1408 1da177e4SLinus Torvalds
1409 1da177e4SLinus Torvalds# distclean
1410 1da177e4SLinus Torvalds#
1411 46457133SMasahiro Yamadadistclean: rm-dirs  := $(wildcard $(DISTCLEAN_DIRS))
1412 46457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
1413 46457133SMasahiro Yamada
1414 4f193362SPaul SmithPHONY += distclean
1415 1da177e4SLinus Torvalds
1416 1da177e4SLinus Torvaldsdistclean: mrproper
1417 46457133SMasahiro Yamada	$(call cmd,rmdirs)
1418 46457133SMasahiro Yamada	$(call cmd,rmfiles)
1419 1da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
1420 1da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1421 f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1422 f78271dfSMasahiro Yamada		-o -name 'core' \) \
1423 1da177e4SLinus Torvalds		-type f -print | xargs rm -f
1424 1da177e4SLinus Torvalds
1425 1da177e4SLinus Torvalds
1426 1da177e4SLinus Torvalds# Packaging of the kernel to various formats
1427 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1428 1da177e4SLinus Torvalds
1429 bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1430 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1431 031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1432 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1433 1da177e4SLinus Torvalds
1434 1da177e4SLinus Torvalds# Brief documentation of the typical targets used
1435 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1436 1da177e4SLinus Torvalds
1437 5dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1438 a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
1439 5dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1440 5dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
1441 1da177e4SLinus Torvalds
1442 fe69b420SMasahiro YamadaPHONY += help
1443 1da177e4SLinus Torvaldshelp:
1444 1da177e4SLinus Torvalds	@echo  'Cleaning targets:'
1445 5ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
1446 5cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
1447 5ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1448 5cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
1449 1da177e4SLinus Torvalds	@echo  ''
1450 1da177e4SLinus Torvalds	@echo  'Configuration targets:'
1451 1da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1452 1da177e4SLinus Torvalds	@echo  ''
1453 1da177e4SLinus Torvalds	@echo  'Other generic targets:'
1454 1da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
1455 1da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
1456 1da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
1457 9cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1458 1da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
1459 40ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1460 433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1461 433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
1462 62718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1463 62718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1464 155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1465 c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
1466 1da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
1467 1da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1468 f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
1469 3f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
1470 3f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
1471 3f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
1472 2fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1473 59df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1474 2fb9b1bdSSam Ravnborg	 echo  ''
1475 31b8cc80SRandy Dunlap	@echo  'Static analysers:'
1476 1da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1477 1da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1478 aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1479 ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1480 295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1481 74425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
1482 7f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
1483 74425eeeSNicolas Palix	@echo  ''
1484 eb8305aeSMatthias Maennich	@echo  'Tools:'
1485 eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1486 eb8305aeSMatthias Maennich	@echo  ''
1487 31b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1488 5a5da78bSShuah Khan	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
1489 5a5da78bSShuah Khan	@echo  '                    Build, install, and boot kernel before'
1490 5a5da78bSShuah Khan	@echo  '                    running kselftest on it'
1491 dcb825a9SWang Long	@echo  '  kselftest-clean - Remove all generated kselftest files'
1492 bbfe63b6SRandy Dunlap	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existing'
1493 3d6dee7aSBamvor Jian Zhang	@echo  '                    .config.'
1494 5a5da78bSShuah Khan	@echo  ''
1495 37c8a5faSRob Herring	@$(if $(dtstree), \
1496 37c8a5faSRob Herring		echo 'Devicetree:'; \
1497 37c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
1498 37c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1499 7aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
1500 7aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
1501 37c8a5faSRob Herring		echo '')
1502 37c8a5faSRob Herring
1503 31b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
1504 31b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
1505 31b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
1506 31b8cc80SRandy Dunlap	@echo  ''
1507 1da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1508 000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
1509 1da177e4SLinus Torvalds	@echo  ''
1510 1da177e4SLinus Torvalds	@echo  'Documentation targets:'
1511 cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1512 1da177e4SLinus Torvalds	@echo  ''
1513 01dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
1514 1da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
1515 01dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
1516 1da177e4SLinus Torvalds	@echo  ''
1517 1da177e4SLinus Torvalds	@$(if $(boards), \
1518 1da177e4SLinus Torvalds		$(foreach b, $(boards), \
1519 4234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1520 1da177e4SLinus Torvalds		echo '')
1521 5dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
1522 5dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
1523 5dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1524 5dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
1525 5dffbe81SSegher Boessenkool		echo '')
1526 1da177e4SLinus Torvalds
1527 1da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1528 45d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1529 1da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1530 a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1531 a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1532 701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1533 af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1534 e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
1535 28bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
1536 28bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
1537 28bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1538 a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
1539 1da177e4SLinus Torvalds	@echo  ''
1540 1da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
1541 1da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
1542 1da177e4SLinus Torvalds
1543 1da177e4SLinus Torvalds
1544 5dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
1545 5dffbe81SSegher Boessenkool
1546 5dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
1547 5dffbe81SSegher Boessenkool
1548 fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1549 5dffbe81SSegher Boessenkool
1550 5dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
1551 5dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
1552 5dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
1553 5dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
1554 5dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1555 5dffbe81SSegher Boessenkool		echo '')
1556 5dffbe81SSegher Boessenkool
1557 5dffbe81SSegher Boessenkool
1558 1da177e4SLinus Torvalds# Documentation targets
1559 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1560 e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1561 e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
1562 22cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1563 bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1564 cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
1565 1da177e4SLinus Torvalds
1566 67274c08SMasahiro Yamada# Misc
1567 67274c08SMasahiro Yamada# ---------------------------------------------------------------------------
1568 67274c08SMasahiro Yamada
1569 67274c08SMasahiro YamadaPHONY += scripts_gdb
1570 7a739ce5SMasahiro Yamadascripts_gdb: prepare0
1571 1e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
1572 8d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1573 67274c08SMasahiro Yamada
1574 67274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
1575 67274c08SMasahiro Yamadaall: scripts_gdb
1576 67274c08SMasahiro Yamadaendif
1577 67274c08SMasahiro Yamada
1578 1da177e4SLinus Torvaldselse # KBUILD_EXTMOD
1579 1da177e4SLinus Torvalds
1580 1da177e4SLinus Torvalds###
1581 1da177e4SLinus Torvalds# External module support.
1582 1da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
1583 1da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
1584 1da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
1585 1da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
1586 1da177e4SLinus Torvalds# be used.
1587 1da177e4SLinus Torvalds#
1588 1da177e4SLinus Torvalds# The following are the only valid targets when building external
1589 1da177e4SLinus Torvalds# modules.
1590 1da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
1591 1da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
1592 1da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
1593 1da177e4SLinus Torvalds# make M=dir modules_install
1594 070b98bfSSam Ravnborg#                      Install the modules built in the module directory
1595 1da177e4SLinus Torvalds#                      Assumes install directory is already created
1596 1da177e4SLinus Torvalds
1597 1da177e4SLinus Torvalds# We are always building modules
1598 1da177e4SLinus TorvaldsKBUILD_MODULES := 1
1599 1da177e4SLinus Torvalds
1600 4f193362SPaul SmithPHONY += $(objtree)/Module.symvers
1601 1da177e4SLinus Torvalds$(objtree)/Module.symvers:
1602 1da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
1603 1da177e4SLinus Torvalds	echo; \
1604 1da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1605 1da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
1606 1da177e4SLinus Torvalds	echo )
1607 1da177e4SLinus Torvalds
1608 c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1609 c99f3918SMasahiro YamadaPHONY += modules
1610 c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers
1611 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1612 1da177e4SLinus Torvalds
1613 4f193362SPaul SmithPHONY += modules_install
1614 a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1615 a67dc21aSSam Ravnborg
1616 a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1617 4f193362SPaul SmithPHONY += _emodinst_
1618 a67dc21aSSam Ravnborg_emodinst_:
1619 a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1620 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1621 1da177e4SLinus Torvalds
1622 4f193362SPaul SmithPHONY += _emodinst_post
1623 a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1624 a67dc21aSSam Ravnborg	$(call cmd,depmod)
1625 a67dc21aSSam Ravnborg
1626 76cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
1627 bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
1628 1da177e4SLinus Torvalds
1629 d4945049SMasahiro YamadaPHONY += /
1630 d4945049SMasahiro Yamada/:
1631 d4945049SMasahiro Yamada	@echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1632 d4945049SMasahiro Yamada
1633 fe69b420SMasahiro YamadaPHONY += help
1634 1da177e4SLinus Torvaldshelp:
1635 1da177e4SLinus Torvalds	@echo  '  Building external modules.'
1636 1da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1637 1da177e4SLinus Torvalds	@echo  ''
1638 1da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
1639 1da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
1640 1da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
1641 1da177e4SLinus Torvalds	@echo  ''
1642 06300b21SSam Ravnborg
1643 059bc9fcSMasahiro YamadaPHONY += prepare
1644 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
1645 1da177e4SLinus Torvalds
1646 b1fbfcb4SMasahiro Yamada# Single targets
1647 b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1648 b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1649 b1fbfcb4SMasahiro Yamada#
1650 b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1651 b1fbfcb4SMasahiro Yamada#
1652 b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1653 b1fbfcb4SMasahiro Yamada#
1654 b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1655 b1fbfcb4SMasahiro Yamada#
1656 b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1657 b1fbfcb4SMasahiro Yamada
1658 b1fbfcb4SMasahiro Yamadaifdef single-build
1659 b1fbfcb4SMasahiro Yamada
1660 b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1661 b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1662 b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1663 b1fbfcb4SMasahiro Yamada
1664 b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1665 b1fbfcb4SMasahiro Yamada	@:
1666 b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1667 b1fbfcb4SMasahiro Yamada	@:
1668 b1fbfcb4SMasahiro Yamada
1669 b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1670 b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1671 b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1672 b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1673 b1fbfcb4SMasahiro Yamadaendif
1674 b1fbfcb4SMasahiro Yamada
1675 b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1676 b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko)
1677 b1fbfcb4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1678 b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1679 b1fbfcb4SMasahiro Yamada
1680 b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1681 b1fbfcb4SMasahiro Yamada
1682 b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1683 b1fbfcb4SMasahiro Yamada
1684 b1fbfcb4SMasahiro Yamada# trim unrelated directories
1685 b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1686 b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1687 b1fbfcb4SMasahiro Yamada
1688 b1fbfcb4SMasahiro Yamadaendif
1689 b1fbfcb4SMasahiro Yamada
1690 c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1691 c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1692 c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1693 c99f3918SMasahiro Yamada# make menuconfig etc.
1694 c99f3918SMasahiro Yamada# Error messages still appears in the original language
1695 c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1696 c99f3918SMasahiro Yamadadescend: $(build-dirs)
1697 c99f3918SMasahiro Yamada$(build-dirs): prepare
1698 b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
1699 f566e1fbSMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \
1700 b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1701 c99f3918SMasahiro Yamada
1702 76cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
1703 76cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
1704 76cd306dSMasahiro Yamada$(clean-dirs):
1705 76cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1706 76cd306dSMasahiro Yamada
1707 88d7be03SMichal Marekclean: $(clean-dirs)
1708 88d7be03SMichal Marek	$(call cmd,rmdirs)
1709 88d7be03SMichal Marek	$(call cmd,rmfiles)
1710 43f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1711 ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1712 4f0e3a57SRob Herring		-o -name '*.ko.*' \
1713 4f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1714 ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1715 bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
1716 88d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1717 9a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
1718 4fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
1719 88d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
1720 8b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
1721 6b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1722 433db3e2SVinícius Tinti		-o -name '*.ll' \
1723 88d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
1724 88d7be03SMichal Marek
1725 1da177e4SLinus Torvalds# Generate tags for editors
1726 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1727 a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1728 858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1729 1da177e4SLinus Torvalds
1730 f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
1731 1da177e4SLinus Torvalds	$(call cmd,tags)
1732 1da177e4SLinus Torvalds
1733 eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1734 eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1735 eb8305aeSMatthias Maennich
1736 eb8305aeSMatthias MaennichPHONY += nsdeps
1737 bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1738 eb8305aeSMatthias Maennichnsdeps: modules
1739 bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1740 eb8305aeSMatthias Maennich
1741 1da177e4SLinus Torvalds# Scripts to check various things for consistency
1742 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1743 1da177e4SLinus Torvalds
1744 279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1745 279f3dd3SPeter Foley
1746 1da177e4SLinus Torvaldsincludecheck:
1747 436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1748 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1749 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1750 1da177e4SLinus Torvalds
1751 1da177e4SLinus Torvaldsversioncheck:
1752 2ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1753 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1754 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1755 1da177e4SLinus Torvalds
1756 74425eeeSNicolas Palixcoccicheck:
1757 858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
1758 74425eeeSNicolas Palix
1759 1da177e4SLinus Torvaldsnamespacecheck:
1760 1da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
1761 1da177e4SLinus Torvalds
1762 295ac051SAdrian Bunkexport_report:
1763 295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1764 295ac051SAdrian Bunk
1765 c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1766 e3ccf6e3SJeff Dike
1767 011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1768 011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1769 011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1770 011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1771 011e3a9aSJeff Dikeifeq ($(ARCH), um)
1772 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1773 011e3a9aSJeff Dikeelse
1774 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1775 011e3a9aSJeff Dikeendif
1776 1da177e4SLinus Torvaldscheckstack:
1777 1da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1778 75dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1779 1da177e4SLinus Torvalds
1780 7b8ea53dSAmerigo Wangkernelrelease:
1781 7b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1782 01ab1788SAmerigo Wang
1783 cb58455cSSam Ravnborgkernelversion:
1784 2244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
1785 1da177e4SLinus Torvalds
1786 c398ff00SMike Marciniszynimage_name:
1787 c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1788 c398ff00SMike Marciniszyn
1789 ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1790 f47a23ceSMasahiro Yamada
1791 f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1792 f47a23ceSMasahiro Yamadatools_silent=s
1793 f47a23ceSMasahiro Yamadaendif
1794 f47a23ceSMasahiro Yamada
1795 ea01fa9fSBorislav Petkovtools/: FORCE
1796 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1797 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1798 ea01fa9fSBorislav Petkov
1799 ea01fa9fSBorislav Petkovtools/%: FORCE
1800 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1801 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1802 ea01fa9fSBorislav Petkov
1803 1da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
1804 1da177e4SLinus Torvalds# ===========================================================================
1805 1da177e4SLinus Torvalds
1806 1da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1807 1da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
1808 1da177e4SLinus Torvalds
1809 1da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1810 1da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
1811 1da177e4SLinus Torvalds
1812 bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
1813 50a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1814 569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1815 5a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
1816 50a8ec31SSam Ravnborg
1817 392885eeSMasahiro Yamada# read saved command lines for existing targets
1818 392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
1819 1da177e4SLinus Torvalds
1820 b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
1821 1da177e4SLinus Torvalds
1822 2042b548SMasahiro Yamadaendif # config-targets
1823 2042b548SMasahiro Yamadaendif # mixed-build
1824 688931a5SMasahiro Yamadaendif # need-sub-make
1825 1da177e4SLinus Torvalds
1826 4f193362SPaul SmithPHONY += FORCE
1827 1da177e4SLinus TorvaldsFORCE:
1828 4f193362SPaul Smith
1829 bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1830 fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
1831 4f193362SPaul Smith.PHONY: $(PHONY)
1832