xref: /openbmc/linux/Makefile (revision 121c2a137767df5f9f301795e7d3757d1af04b21)
1 b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2 bfeffd15SLinus TorvaldsVERSION = 5
3 8f3d9f35SLinus TorvaldsPATCHLEVEL = 7
4 55922c9dSLinus TorvaldsSUBLEVEL = 0
5 2ef96a5bSLinus TorvaldsEXTRAVERSION = -rc5
6 d6d5df1dSLinus TorvaldsNAME = Kleptomaniac Octopus
7 1da177e4SLinus Torvalds
8 1da177e4SLinus Torvalds# *DOCUMENTATION*
9 1da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
10 1da177e4SLinus Torvalds# More info can be located in ./README
11 1da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
12 1da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
13 1da177e4SLinus Torvalds
14 *121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \
15 *121c2a13SMasahiro Yamada	$(error targets prefixed with '__' are only for internal use))
16 *121c2a13SMasahiro Yamada
17 ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
18 *121c2a13SMasahiro YamadaPHONY := __all
19 *121c2a13SMasahiro Yamada__all:
20 ba634eceSMasahiro Yamada
21 1da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
22 1da177e4SLinus Torvalds# to get the ordering right.
23 1da177e4SLinus Torvalds#
24 1da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
25 1da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
26 1da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
27 f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
28 1da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
29 1da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
30 1da177e4SLinus Torvalds# is now up to date.
31 1da177e4SLinus Torvalds#
32 1da177e4SLinus Torvalds# The only cases where we need to modify files which have global
33 1da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
34 1da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
35 1da177e4SLinus Torvalds# prepare rule.
36 1da177e4SLinus Torvalds
37 221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
38 3812b8c5SMasahiro Yamada
39 3812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
40 3812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
41 3812b8c5SMasahiro YamadaMAKEFLAGS += -rR
42 3812b8c5SMasahiro Yamada
43 3812b8c5SMasahiro Yamada# Avoid funny character set dependencies
44 3812b8c5SMasahiro Yamadaunexport LC_ALL
45 3812b8c5SMasahiro YamadaLC_COLLATE=C
46 3812b8c5SMasahiro YamadaLC_NUMERIC=C
47 3812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
48 3812b8c5SMasahiro Yamada
49 3812b8c5SMasahiro Yamada# Avoid interference with shell env settings
50 3812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
51 3812b8c5SMasahiro Yamada
52 066b7ed9SMichal Marek# Beautify output
53 066b7ed9SMichal Marek# ---------------------------------------------------------------------------
54 066b7ed9SMichal Marek#
55 066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
56 066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
57 066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
58 066b7ed9SMichal Marek#
59 066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
60 066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
61 066b7ed9SMichal Marek#
62 066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
63 066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
64 066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
65 066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
66 066b7ed9SMichal Marek#
67 066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
68 066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
69 066b7ed9SMichal Marek#
70 066b7ed9SMichal Marek#	$(Q)ln $@ :<
71 066b7ed9SMichal Marek#
72 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
73 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
74 505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
75 066b7ed9SMichal Marek#
76 1da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
77 1da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
78 1da177e4SLinus Torvalds
79 1da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
80 1da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
81 1da177e4SLinus Torvaldsendif
82 1da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
83 1da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
84 1da177e4SLinus Torvaldsendif
85 1da177e4SLinus Torvalds
86 066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
87 066b7ed9SMichal Marek  quiet =
88 066b7ed9SMichal Marek  Q =
89 066b7ed9SMichal Marekelse
90 066b7ed9SMichal Marek  quiet=quiet_
91 066b7ed9SMichal Marek  Q = @
92 066b7ed9SMichal Marekendif
93 066b7ed9SMichal Marek
94 066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
95 066b7ed9SMichal Marek# commands
96 066b7ed9SMichal Marek
97 6f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
98 066b7ed9SMichal Marek  quiet=silent_
99 066b7ed9SMichal Marekendif
100 066b7ed9SMichal Marek
101 066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
102 066b7ed9SMichal Marek
103 25b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
104 25b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
105 25b146c5SMasahiro Yamada#
106 25b146c5SMasahiro Yamada# For example, you can do this:
107 25b146c5SMasahiro Yamada#
108 25b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
109 25b146c5SMasahiro Yamada#
110 25b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
111 25b146c5SMasahiro Yamada# two syntaxes to specify it.
112 25b146c5SMasahiro Yamada#
113 1da177e4SLinus Torvalds# 1) O=
114 1da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
115 1da177e4SLinus Torvalds#
116 1da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
117 25b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
118 25b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
119 1da177e4SLinus Torvalds#
120 1da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
121 1da177e4SLinus Torvalds# variable.
122 1da177e4SLinus Torvalds
123 25b146c5SMasahiro Yamada# Do we want to change the working directory?
124 1da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
125 1da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
126 1da177e4SLinus Torvaldsendif
127 1da177e4SLinus Torvalds
128 25b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
129 25b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
130 25b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
131 25b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
132 25b146c5SMasahiro Yamada$(if $(abs_objtree),, \
133 25b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
134 25b146c5SMasahiro Yamada
135 25b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
136 25b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
137 25b146c5SMasahiro Yamadaelse
138 25b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
139 25b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
140 25b146c5SMasahiro Yamada
141 25b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
142 25b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
143 25b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
144 25b146c5SMasahiro Yamadaelse
145 25b146c5SMasahiro Yamadaneed-sub-make := 1
146 51193b76SRobert Jarzmikendif
147 51193b76SRobert Jarzmik
148 25b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
149 1da177e4SLinus Torvalds
150 25b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
151 25b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
152 25b146c5SMasahiro Yamadaendif
153 25b146c5SMasahiro Yamada
154 25b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
155 80463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
156 80463f1bSMasahiro Yamada#
157 80463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
158 25b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
159 25b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
160 688931a5SMasahiro Yamadaneed-sub-make := 1
161 25b146c5SMasahiro Yamadaendif
162 3812b8c5SMasahiro Yamada
163 93fdddfeSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST))
164 93fdddfeSMasahiro Yamada
165 688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
166 688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
167 688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
168 688931a5SMasahiro Yamadaneed-sub-make := 1
169 688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
170 93fdddfeSMasahiro Yamada$(this-makefile): ;
171 688931a5SMasahiro Yamadaendif
172 688931a5SMasahiro Yamada
173 25b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
174 221cc2d2SMasahiro Yamadaexport sub_make_done := 1
175 221cc2d2SMasahiro Yamada
176 688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
177 688931a5SMasahiro Yamada
178 *121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make
179 0b35786dSMilton Miller
180 *121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
181 16f89098SCharles Keepax	@:
182 0b35786dSMilton Miller
183 c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
184 *121c2a13SMasahiro Yamada__sub-make:
185 25b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
186 1da177e4SLinus Torvalds
187 688931a5SMasahiro Yamadaendif # need-sub-make
188 221cc2d2SMasahiro Yamadaendif # sub_make_done
189 688931a5SMasahiro Yamada
190 1da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
191 688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
192 1da177e4SLinus Torvalds
193 7ff52571SMasahiro Yamada# Do not print "Entering directory ...",
194 7ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
195 7ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
196 7ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
197 7ff52571SMasahiro Yamada
198 aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
199 aa55c8e2SMasahiro Yamada# C compilation.
200 aa55c8e2SMasahiro Yamada#
201 aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
202 aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
203 aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
204 aa55c8e2SMasahiro Yamada#
205 036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
206 036db11cSCao jin# including where to get the "sparse" utility.
207 aa55c8e2SMasahiro Yamada
208 aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
209 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
210 aa55c8e2SMasahiro Yamadaendif
211 aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
212 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
213 aa55c8e2SMasahiro Yamadaendif
214 aa55c8e2SMasahiro Yamada
215 7e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
216 7e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
217 aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
218 aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
219 aa55c8e2SMasahiro Yamadaendif
220 aa55c8e2SMasahiro Yamada
221 051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD
222 051f278eSMasahiro Yamada
223 394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
224 394053f4SMasahiro Yamada
225 25b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
226 9da0763bSMichal Marek        # building in the source tree
227 9da0763bSMichal Marek        srctree := .
228 051f278eSMasahiro Yamada	building_out_of_srctree :=
229 9da0763bSMichal Marekelse
230 25b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
231 9da0763bSMichal Marek                # building in a subdirectory of the source tree
232 9da0763bSMichal Marek                srctree := ..
233 9da0763bSMichal Marek        else
234 25b146c5SMasahiro Yamada                srctree := $(abs_srctree)
235 9da0763bSMichal Marek        endif
236 051f278eSMasahiro Yamada	building_out_of_srctree := 1
237 9da0763bSMichal Marekendif
238 2c1f4f12SMasahiro Yamada
239 95fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
240 95fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
241 95fd3f87SMasahiro Yamadaendif
242 2c1f4f12SMasahiro Yamada
243 7e1c0477SMichal Marekobjtree		:= .
244 6b12de69SMasahiro YamadaVPATH		:= $(srctree)
245 1da177e4SLinus Torvalds
246 051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
247 1da177e4SLinus Torvalds
248 2c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
249 2c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
250 2c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
251 2c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
252 2c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
253 2c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
254 2c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
255 2c1f4f12SMasahiro Yamada
256 2c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
257 2c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
258 2c1f4f12SMasahiro Yamada
259 22340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
260 22340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
261 2c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
262 59b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
263 4623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
264 4623980dSDavid Engraf			 outputmakefile
265 a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \
266 a29d4d8cSMasahiro Yamada			   kernelrelease
267 394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
268 2c1f4f12SMasahiro Yamada
269 2042b548SMasahiro Yamadaconfig-build	:=
270 2042b548SMasahiro Yamadamixed-build	:=
271 2042b548SMasahiro Yamadaneed-config	:= 1
272 d7942413SMasahiro Yamadamay-sync-config	:= 1
273 394053f4SMasahiro Yamadasingle-build	:=
274 2c1f4f12SMasahiro Yamada
275 2c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
276 2c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
277 2042b548SMasahiro Yamada		need-config :=
278 2c1f4f12SMasahiro Yamada	endif
279 2c1f4f12SMasahiro Yamadaendif
280 2c1f4f12SMasahiro Yamada
281 d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
282 d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
283 2042b548SMasahiro Yamada		may-sync-config :=
284 d7942413SMasahiro Yamada	endif
285 d7942413SMasahiro Yamadaendif
286 d7942413SMasahiro Yamada
287 d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
288 2042b548SMasahiro Yamada	may-sync-config :=
289 d7942413SMasahiro Yamadaendif
290 d7942413SMasahiro Yamada
291 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
292 2c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
293 2042b548SMasahiro Yamada		config-build := 1
294 2c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
295 2042b548SMasahiro Yamada			mixed-build := 1
296 2c1f4f12SMasahiro Yamada                endif
297 2c1f4f12SMasahiro Yamada        endif
298 2c1f4f12SMasahiro Yamadaendif
299 22340a06SMasahiro Yamada
300 394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
301 394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
302 394053f4SMasahiro Yamada	single-build := 1
303 394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
304 394053f4SMasahiro Yamada		mixed-build := 1
305 394053f4SMasahiro Yamada	endif
306 394053f4SMasahiro Yamadaendif
307 394053f4SMasahiro Yamada
308 22340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
309 22340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
310 22340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
311 2042b548SMasahiro Yamada		mixed-build := 1
312 22340a06SMasahiro Yamada        endif
313 22340a06SMasahiro Yamadaendif
314 22340a06SMasahiro Yamada
315 2c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
316 2c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
317 2c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
318 2042b548SMasahiro Yamada		mixed-build := 1
319 2c1f4f12SMasahiro Yamada        endif
320 2c1f4f12SMasahiro Yamadaendif
321 2c1f4f12SMasahiro Yamada
322 2042b548SMasahiro Yamadaifdef mixed-build
323 2c1f4f12SMasahiro Yamada# ===========================================================================
324 2c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
325 2c1f4f12SMasahiro Yamada# Handle them one by one.
326 2c1f4f12SMasahiro Yamada
327 2c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
328 2c1f4f12SMasahiro Yamada
329 *121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one
330 2c1f4f12SMasahiro Yamada	@:
331 2c1f4f12SMasahiro Yamada
332 2c1f4f12SMasahiro Yamada__build_one_by_one:
333 2c1f4f12SMasahiro Yamada	$(Q)set -e; \
334 2c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
335 2c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
336 2c1f4f12SMasahiro Yamada	done
337 2c1f4f12SMasahiro Yamada
338 2042b548SMasahiro Yamadaelse # !mixed-build
339 2c1f4f12SMasahiro Yamada
340 2c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
341 2c1f4f12SMasahiro Yamada
342 2c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
343 2c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
344 2c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
345 2c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
346 2c1f4f12SMasahiro Yamada
347 b2d35fa5SAnders Roxellinclude scripts/subarch.include
348 1da177e4SLinus Torvalds
349 1da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
350 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
351 1da177e4SLinus Torvalds#
352 1da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
353 1da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
354 1da177e4SLinus Torvalds# ARCH can be set during invocation of make:
355 1da177e4SLinus Torvalds# make ARCH=ia64
356 1da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
357 1da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
358 1da177e4SLinus Torvalds
359 1da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
360 1da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
361 1da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
362 1da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
363 1da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
364 1da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
365 1da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
366 1da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
367 2331d1a6SSam RavnborgARCH		?= $(SUBARCH)
368 1da177e4SLinus Torvalds
369 1da177e4SLinus Torvalds# Architecture as present in compile.h
370 1da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
371 6752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
372 1da177e4SLinus Torvalds
373 d746d647SSam Ravnborg# Additional ARCH settings for x86
374 d746d647SSam Ravnborgifeq ($(ARCH),i386)
375 d746d647SSam Ravnborg        SRCARCH := x86
376 d746d647SSam Ravnborgendif
377 d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
378 d746d647SSam Ravnborg        SRCARCH := x86
379 d746d647SSam Ravnborgendif
380 74b469f2SSam Ravnborg
381 5e538790SSam Ravnborg# Additional ARCH settings for sparc
382 e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
383 e69f58c0SNamhyung Kim       SRCARCH := sparc
384 e69f58c0SNamhyung Kimendif
385 a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
386 5e538790SSam Ravnborg       SRCARCH := sparc
387 a439fe51SSam Ravnborgendif
388 2fb9b1bdSSam Ravnborg
389 3cc000b5SPaul Mundt# Additional ARCH settings for sh
390 3cc000b5SPaul Mundtifeq ($(ARCH),sh64)
391 3cc000b5SPaul Mundt       SRCARCH := sh
392 3cc000b5SPaul Mundtendif
393 3cc000b5SPaul Mundt
394 14cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
395 41263fc6SBen Gardinerexport KCONFIG_CONFIG
396 14cdd3c4SRoman Zippel
397 2a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
398 2a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig
399 2a86f661SMasahiro Yamada
400 1da177e4SLinus Torvalds# SHELL used by kbuild
401 858805b3SMasahiro YamadaCONFIG_SHELL := sh
402 1da177e4SLinus Torvalds
403 6d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
404 6d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
405 6d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
406 d7f14c66SUwe Kleine-König
407 a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
408 a0d1c951SMasahiro YamadaHOSTCC	= clang
409 a0d1c951SMasahiro YamadaHOSTCXX	= clang++
410 a0d1c951SMasahiro Yamadaelse
411 1da177e4SLinus TorvaldsHOSTCC	= gcc
412 1da177e4SLinus TorvaldsHOSTCXX	= g++
413 a0d1c951SMasahiro Yamadaendif
414 7f3a59dbSMasahiro Yamada
415 7f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
416 7f3a59dbSMasahiro Yamada			      -O2 -fomit-frame-pointer -std=gnu89
417 7f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS :=
418 7f3a59dbSMasahiro Yamada
419 7f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS   := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
420 735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
421 f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
422 f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
423 1da177e4SLinus Torvalds
424 1da177e4SLinus Torvalds# Make variables (CC, etc...)
425 1da177e4SLinus TorvaldsCPP		= $(CC) -E
426 a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
427 a0d1c951SMasahiro YamadaCC		= clang
428 a0d1c951SMasahiro YamadaLD		= ld.lld
429 a0d1c951SMasahiro YamadaAR		= llvm-ar
430 a0d1c951SMasahiro YamadaNM		= llvm-nm
431 a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
432 a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
433 a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
434 a0d1c951SMasahiro YamadaOBJSIZE		= llvm-size
435 a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
436 a0d1c951SMasahiro Yamadaelse
437 a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
438 a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
439 1da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
440 1da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
441 1da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
442 1da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
443 eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
444 a0d1c951SMasahiro YamadaOBJSIZE		= $(CROSS_COMPILE)size
445 a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
446 a0d1c951SMasahiro Yamadaendif
447 e83b9f55SAndrii NakryikoPAHOLE		= pahole
448 73a4f6dbSMasahiro YamadaLEX		= flex
449 73a4f6dbSMasahiro YamadaYACC		= bison
450 1da177e4SLinus TorvaldsAWK		= awk
451 caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
452 1da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
453 1da177e4SLinus TorvaldsPERL		= perl
454 011bf125SMasahiro YamadaPYTHON		= python
455 e9781b52SMasahiro YamadaPYTHON3		= python3
456 1da177e4SLinus TorvaldsCHECK		= sparse
457 858805b3SMasahiro YamadaBASH		= bash
458 1da177e4SLinus Torvalds
459 80a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
460 6c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
461 0c22be07SDouglas AndersonNOSTDINC_FLAGS :=
462 6588169dSSam RavnborgCFLAGS_MODULE   =
463 6588169dSSam RavnborgAFLAGS_MODULE   =
464 6588169dSSam RavnborgLDFLAGS_MODULE  =
465 1da177e4SLinus TorvaldsCFLAGS_KERNEL	=
466 1da177e4SLinus TorvaldsAFLAGS_KERNEL	=
467 b36fad65SMichal MarekLDFLAGS_vmlinux =
468 1da177e4SLinus Torvalds
469 abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
470 abbf1590SDavid HowellsUSERINCLUDE    := \
471 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
472 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
473 abbf1590SDavid Howells		-I$(srctree)/include/uapi \
474 3308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
475 abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
476 abbf1590SDavid Howells
477 1da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
478 1da177e4SLinus Torvalds# Needed to be compatible with the O= option
479 abbf1590SDavid HowellsLINUXINCLUDE    := \
480 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
481 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
482 051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
483 f8224f7fSMasahiro Yamada		-I$(objtree)/include \
484 f8224f7fSMasahiro Yamada		$(USERINCLUDE)
485 1da177e4SLinus Torvalds
486 42a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
487 eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
488 42a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
489 b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
490 51b97e35SKirill A. Shutemov		   -Wno-format-security \
491 433dc2ebSMasahiro Yamada		   -std=gnu89
492 433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
493 80c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
494 80c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
495 6588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
496 6588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
497 10df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
498 10df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
499 d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
500 433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
501 5241ab4cSMasahiro YamadaCLANG_FLAGS :=
502 1da177e4SLinus Torvalds
503 aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
504 eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
505 94f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
506 7bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
507 1da177e4SLinus Torvalds
508 d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
509 0e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
510 0e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
511 222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
512 6588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
513 80c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
514 1da177e4SLinus Torvalds
515 1da177e4SLinus Torvalds# Files to ignore in find ... statements
516 1da177e4SLinus Torvalds
517 ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
518 ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
519 ae63b2d7SPrarit Bhargava			  -prune -o
520 450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
521 450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
522 1da177e4SLinus Torvalds
523 1da177e4SLinus Torvalds# ===========================================================================
524 1da177e4SLinus Torvalds# Rules shared between *config targets and build targets
525 1da177e4SLinus Torvalds
526 312a3d09SCao jin# Basic helpers built in scripts/basic/
527 4f193362SPaul SmithPHONY += scripts_basic
528 1da177e4SLinus Torvaldsscripts_basic:
529 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
530 638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
531 1da177e4SLinus Torvalds
532 4f193362SPaul SmithPHONY += outputmakefile
533 e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
534 fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
535 fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
536 fd5f0cd6SJan Beulich# output directory.
537 3a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
538 3a51ff34SVladimir Kondratiev# ignore whole output directory
539 1da177e4SLinus Torvaldsoutputmakefile:
540 051f278eSMasahiro Yamadaifdef building_out_of_srctree
541 e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
542 e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
543 e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
544 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
545 e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
546 e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
547 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
548 e8e83a23SMasahiro Yamada		false; \
549 e8e83a23SMasahiro Yamada	fi
550 92979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
551 4fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
552 156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
553 156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
554 fd5f0cd6SJan Beulichendif
555 1da177e4SLinus Torvalds
556 99516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
557 ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
558 5241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
559 ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
560 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)
561 ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
562 ae6b289aSChris Friesendif
563 ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
564 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
565 ae6b289aSChris Friesendif
566 7e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1)
567 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
568 876a0600SNathan Chancellorendif
569 589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
570 238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
571 238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
572 3bd98050SJoel Stanleyexport CLANG_FLAGS
573 ae6b289aSChris Friesendif
574 ae6b289aSChris Fries
575 315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
576 315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
577 315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
578 315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
579 902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
580 315bab4eSMasahiro Yamada
581 2042b548SMasahiro Yamadaifdef config-build
582 1da177e4SLinus Torvalds# ===========================================================================
583 1da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
584 1da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
585 1da177e4SLinus Torvalds
586 1da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
587 1da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
588 1da177e4SLinus Torvalds# used for 'make defconfig'
589 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
590 315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
591 1da177e4SLinus Torvalds
592 36de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
593 31110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
594 31110ebbSSam Ravnborg
595 36de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
596 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
597 1da177e4SLinus Torvalds
598 2042b548SMasahiro Yamadaelse #!config-build
599 1da177e4SLinus Torvalds# ===========================================================================
600 1da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
601 1da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
602 1da177e4SLinus Torvalds
603 2c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
604 *121c2a13SMasahiro Yamada# but instead __all depend on modules
605 2c1f4f12SMasahiro YamadaPHONY += all
606 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
607 *121c2a13SMasahiro Yamada__all: all
608 2c1f4f12SMasahiro Yamadaelse
609 *121c2a13SMasahiro Yamada__all: modules
610 2c1f4f12SMasahiro Yamadaendif
611 2c1f4f12SMasahiro Yamada
612 2c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
613 2c1f4f12SMasahiro Yamada# Normally, just do built-in.
614 2c1f4f12SMasahiro Yamada
615 2c1f4f12SMasahiro YamadaKBUILD_MODULES :=
616 2c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
617 2c1f4f12SMasahiro Yamada
618 2c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
619 2c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider
620 2c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to
621 2c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them.
622 2c1f4f12SMasahiro Yamada
623 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
624 2c1f4f12SMasahiro Yamada  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
625 2c1f4f12SMasahiro Yamadaendif
626 2c1f4f12SMasahiro Yamada
627 2c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
628 2c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
629 2c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
630 2c1f4f12SMasahiro Yamada
631 *121c2a13SMasahiro Yamadaifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),)
632 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
633 2c1f4f12SMasahiro Yamadaendif
634 2c1f4f12SMasahiro Yamada
635 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
636 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
637 2c1f4f12SMasahiro Yamadaendif
638 2c1f4f12SMasahiro Yamada
639 2c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
640 2c1f4f12SMasahiro Yamada
641 2042b548SMasahiro Yamadaifdef need-config
642 d93a18f2SMasahiro Yamadainclude include/config/auto.conf
643 d93a18f2SMasahiro Yamadaendif
644 d93a18f2SMasahiro Yamada
645 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
646 1da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
647 1da177e4SLinus Torvaldsinit-y		:= init/
648 f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
649 d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
650 1da177e4SLinus Torvaldsnet-y		:= net/
651 1da177e4SLinus Torvaldslibs-y		:= lib/
652 1da177e4SLinus Torvaldscore-y		:= usr/
653 37d9fe47SFeng Wuvirt-y		:= virt/
654 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
655 1da177e4SLinus Torvalds
656 315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
657 315bab4eSMasahiro Yamada# command line.
658 315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
659 315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
660 315bab4eSMasahiro Yamadaall: vmlinux
661 315bab4eSMasahiro Yamada
662 315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
663 315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
664 315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
665 5aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
666 315bab4eSMasahiro Yamada
667 b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
668 b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
669 b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
670 b1f4ff74SPaulo Zanoniendif
671 b1f4ff74SPaulo Zanoni
672 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
673 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
674 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
675 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
676 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
677 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
678 669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
679 669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
680 669e06b1SMasahiro Yamada
681 315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
682 315bab4eSMasahiro Yamada
683 2042b548SMasahiro Yamadaifdef need-config
684 2042b548SMasahiro Yamadaifdef may-sync-config
685 315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
686 315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
687 315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
688 d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
689 1da177e4SLinus Torvalds
690 05850719SMasahiro Yamada$(KCONFIG_CONFIG):
691 05850719SMasahiro Yamada	@echo >&2 '***'
692 05850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
693 05850719SMasahiro Yamada	@echo >&2 '***'
694 05850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
695 05850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
696 05850719SMasahiro Yamada	@echo >&2 '***'
697 05850719SMasahiro Yamada	@/bin/false
698 1da177e4SLinus Torvalds
699 61277981SUlf Magnusson# The actual configuration files used during the build are stored in
700 61277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
701 61277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
702 9390dff6SMasahiro Yamada#
703 9390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
704 9390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
705 f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
706 3044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
707 911a91c3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
708 2042b548SMasahiro Yamadaelse # !may-sync-config
709 d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
710 d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
711 d7942413SMasahiro Yamada# Use auto.conf to trigger the test
712 9ee4e336SSam RavnborgPHONY += include/config/auto.conf
713 9ee4e336SSam Ravnborg
714 9ee4e336SSam Ravnborginclude/config/auto.conf:
715 264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
716 5369f550SMichal Marek	echo >&2;							\
717 5369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
718 5369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
719 5369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
720 5369f550SMichal Marek	echo >&2 ;							\
721 9ee4e336SSam Ravnborg	/bin/false)
722 9ee4e336SSam Ravnborg
723 d7942413SMasahiro Yamadaendif # may-sync-config
724 2042b548SMasahiro Yamadaendif # need-config
725 1da177e4SLinus Torvalds
726 a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
727 ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
728 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
729 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
730 6f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
731 a1c48bb1SGeert Uytterhoeven
732 15f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
733 a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
734 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
735 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
736 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
737 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
738 1da177e4SLinus Torvaldsendif
739 1da177e4SLinus Torvalds
740 69102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
741 69102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
742 b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
743 69102311SJiri Kosina
744 d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov
745 6b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
746 6b90bd4bSEmese Revfy
747 1873e870SAndi Kleenifdef CONFIG_READABLE_ASM
748 1873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
749 1873e870SAndi Kleen# reorder blocks reorders the control in the function
750 1873e870SAndi Kleen# ipa clone creates specialized cloned functions
751 1873e870SAndi Kleen# partial inlining inlines only parts of functions
752 1873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
753 1873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
754 1873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
755 1873e870SAndi Kleenendif
756 1873e870SAndi Kleen
757 08f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
758 a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
759 35bb5b1eSAndi Kleenendif
760 35bb5b1eSAndi Kleen
761 2a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
762 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
763 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
764 2a61f474SMasahiro Yamada
765 2a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
766 e06b8b98SSam Ravnborg
767 076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
768 a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
769 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
770 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
771 cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
772 cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
773 cfe17c9bSMasahiro Yamada# See modpost pattern 2
774 a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
775 cfe17c9bSMasahiro Yamadaelse
776 cfe17c9bSMasahiro Yamada
777 cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
778 cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
779 9df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
780 e2079e93SNathan Chancellor
781 e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
782 e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
783 e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
784 e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
785 cfe17c9bSMasahiro Yamadaendif
786 cfe17c9bSMasahiro Yamada
787 0a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
788 1da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
789 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
790 1da177e4SLinus Torvaldselse
791 7e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
792 7e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
793 7e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
794 7e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
795 7e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
796 7e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
797 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
798 1da177e4SLinus Torvaldsendif
799 7e9501fdSRabin Vincentendif
800 1da177e4SLinus Torvalds
801 709a972eSKees Cook# Initialize all stack variables with a pattern, if desired.
802 709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL
803 709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
804 709a972eSKees Cookendif
805 709a972eSKees Cook
806 1e88e415SMasahiro YamadaDEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
807 2062afb4SLinus Torvalds
808 1da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
809 866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
810 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
811 866ced95SAndi Kleenelse
812 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
813 866ced95SAndi Kleenendif
814 2288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
815 1da177e4SLinus Torvaldsendif
816 bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
817 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
818 bfaf2dd3SAndi Kleenendif
819 1da177e4SLinus Torvalds
820 d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
821 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
822 e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
823 d6f4ceb7SAndi Kleenendif
824 d6f4ceb7SAndi Kleen
825 1e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
826 1e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
827 1e88e415SMasahiro Yamada
828 606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
829 07d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
830 07d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
831 07d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
832 07d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
833 07d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
834 a2546faeSSteven Rostedt  endif
835 2f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
836 2f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
837 2f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
838 2f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
839 2f4df001SVasily Gorbik    endif
840 2f4df001SVasily Gorbik  endif
841 07d04081SVasily Gorbikendif
842 a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
843 f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
844 f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
845 f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
846 a2546faeSSteven Rostedt  endif
847 f28bc3c3SVasily Gorbikendif
848 f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
849 f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
850 f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
851 72441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
852 cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
853 72441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
854 72441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
855 72441cb1SSteven Rostedt	endif
856 72441cb1SSteven Rostedtendif
857 16444a8aSArnaldo Carvalho de Meloendif
858 16444a8aSArnaldo Carvalho de Melo
859 91341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
860 91341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
861 91341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
862 91341d4bSSam Ravnborgendif
863 91341d4bSSam Ravnborg
864 90ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
865 e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
866 e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
867 90ad4052SMasahiro Yamadaendif
868 90ad4052SMasahiro Yamada
869 43bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH
870 43bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
871 43bd3a95SMiroslav Benesendif
872 43bd3a95SMiroslav Benes
873 e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
874 e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
875 e8e69931SSam Ravnborg
876 1da177e4SLinus Torvalds# warn about C99 declaration after statement
877 a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
878 1da177e4SLinus Torvalds
879 0bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
880 8289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
881 0bb95f80SKees Cook
882 070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
883 fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
884 1da177e4SLinus Torvalds
885 217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
886 217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
887 217c3e01SStephen Rothwell
888 5c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
889 5c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
890 44720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
891 5a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
892 5c45de21SLinus Torvalds
893 adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
894 adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
895 adc71920SLinus Torvalds
896 78a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
897 78a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
898 78a5255fSLinus Torvalds
899 fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
900 a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
901 d0115552SLinus Torvalds
902 87e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this
903 87e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we
904 87e0d4f0SDaniel Borkmann# need to disable it here generally.
905 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fno-merge-all-constants)
906 87e0d4f0SDaniel Borkmann
907 87e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine
908 87e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled.
909 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fmerge-constants)
910 87e0d4f0SDaniel Borkmann
911 3ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
912 3ce120b1SLinus TorvaldsKBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
913 3ce120b1SLinus Torvalds
914 8f7f5c9fSAndi Kleen# conserve stack if available
915 8f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
916 8f7f5c9fSAndi Kleen
917 fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
918 fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
919 fe7c36c7SJosh Triplett
920 ea8daa7bSDaniel Wagner# enforce correct pointer usage
921 ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
922 ea8daa7bSDaniel Wagner
923 c834f0e8SKees Cook# Require designated initializers for all marked structures
924 c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
925 c834f0e8SKees Cook
926 a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
927 a73619a8SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
928 a73619a8SMasahiro Yamada
929 29be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is
930 29be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern
931 29be86d7SSeth Forsheeifdef CONFIG_RETPOLINE
932 29be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
933 29be86d7SSeth Forsheeendif
934 29be86d7SSeth Forshee
935 a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
936 a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
937 c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
938 a86fe353SMasahiro Yamada
939 8cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
940 8cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
941 8cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
942 8cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
943 52bcc330SSam Ravnborg
944 89ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id
945 89ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id
946 18991197SRoland McGrath
947 5d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
948 d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
949 5d7d18f5SDavid Howellsendif
950 5d7d18f5SDavid Howells
951 5cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
952 5cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
953 5cf896fbSPeter Collingbourneendif
954 5cf896fbSPeter Collingbourne
955 7f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
956 7f3a59dbSMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64, $(KBUILD_CFLAGS))
957 7f3a59dbSMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS))
958 7f3a59dbSMasahiro Yamada
959 80591e61SLuc Van Oostenryck# make the checker run with the right architecture
960 80591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
961 80591e61SLuc Van Oostenryck
962 14516765SLuc Van Oostenryck# insure the checker run with the right endianness
963 14516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
964 14516765SLuc Van Oostenryck
965 1f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
966 1f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
967 1f2f01b1SLuc Van Oostenryck
968 1da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
969 1da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
970 1da177e4SLinus Torvalds# set in the environment
971 1da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
972 1da177e4SLinus Torvalds# this default value
973 1da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
974 1da177e4SLinus Torvalds
975 1da177e4SLinus Torvalds#
976 1da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
977 1da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
978 1da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
979 1da177e4SLinus Torvalds
980 1da177e4SLinus Torvalds#
981 f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
982 f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
983 f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
984 f4d4ffc0SJason Cooper#
985 f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
986 f4d4ffc0SJason Cooper
987 f4d4ffc0SJason Cooper#
988 1da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
989 1da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
990 070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
991 1da177e4SLinus Torvalds#
992 1da177e4SLinus Torvalds
993 df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
994 1da177e4SLinus Torvaldsexport MODLIB
995 1da177e4SLinus Torvalds
996 ac031f26STheodore Ts'o#
997 2ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
998 2ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
999 2ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
1000 177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
1001 2ea03891SSam Ravnborg
1002 ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
1003 ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
1004 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
1005 ac031f26STheodore Ts'oelse
1006 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
1007 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
1008 ac031f26STheodore Ts'oelse
1009 2ea03891SSam Ravnborgmod_strip_cmd = true
1010 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
1011 ac031f26STheodore Ts'oexport mod_strip_cmd
1012 ac031f26STheodore Ts'o
1013 beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
1014 beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
1015 beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
1016 beb50df3SBertrand Jacquin
1017 beb50df3SBertrand Jacquinmod_compress_cmd = true
1018 beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
1019 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
1020 3d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
1021 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
1022 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
1023 3d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
1024 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
1025 beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
1026 beb50df3SBertrand Jacquinexport mod_compress_cmd
1027 beb50df3SBertrand Jacquin
1028 d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
1029 3ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
1030 3ee550f1SDavid Woodhouse
1031 3ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1032 e2a666d5SRusty Russellelse
1033 e2a666d5SRusty Russellmod_sign_cmd = true
1034 e2a666d5SRusty Russellendif
1035 e2a666d5SRusty Russellexport mod_sign_cmd
1036 e2a666d5SRusty Russell
1037 056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1038 056d28d1SRolf Eike Beer
1039 9f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
1040 9f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
1041 056d28d1SRolf Eike Beer		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1042 9f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
1043 9f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
1044 9f0c18aeSJosh Poimboeuf  else
1045 9f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
1046 9f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
1047 9f0c18aeSJosh Poimboeuf  endif
1048 9f0c18aeSJosh Poimboeufendif
1049 9f0c18aeSJosh Poimboeuf
1050 e00d8880SMasahiro YamadaPHONY += prepare0
1051 e2a666d5SRusty Russell
1052 394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
1053 bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
1054 47801c97SMasahiro Yamada
1055 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1056 cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1057 1da177e4SLinus Torvalds
1058 1da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
1059 1da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
1060 37d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
1061 1da177e4SLinus Torvalds
1062 1eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
1063 1eaca4b9SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
1064 1eaca4b9SMasahiro Yamada			$(drivers-) $(net-) $(libs-) $(virt-))))
1065 1da177e4SLinus Torvalds
1066 c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
1067 76cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1068 c99f3918SMasahiro Yamada
1069 f49821eeSNicholas Piggininit-y		:= $(patsubst %/, %/built-in.a, $(init-y))
1070 f49821eeSNicholas Piggincore-y		:= $(patsubst %/, %/built-in.a, $(core-y))
1071 f49821eeSNicholas Piggindrivers-y	:= $(patsubst %/, %/built-in.a, $(drivers-y))
1072 f49821eeSNicholas Pigginnet-y		:= $(patsubst %/, %/built-in.a, $(net-y))
1073 7273ad2bSMasahiro Yamadalibs-y2		:= $(patsubst %/, %/built-in.a, $(filter %/, $(libs-y)))
1074 7273ad2bSMasahiro Yamadaifdef CONFIG_MODULES
1075 7273ad2bSMasahiro Yamadalibs-y1		:= $(filter-out %/, $(libs-y))
1076 7273ad2bSMasahiro Yamadalibs-y2		+= $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1077 7273ad2bSMasahiro Yamadaelse
1078 1da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
1079 7273ad2bSMasahiro Yamadaendif
1080 f49821eeSNicholas Pigginvirt-y		:= $(patsubst %/, %/built-in.a, $(virt-y))
1081 1da177e4SLinus Torvalds
1082 1f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1083 d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
1084 d151e971SMasahiro Yamada			      $(drivers-y) $(net-y) $(virt-y)
1085 3a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1)
1086 95698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
1087 1f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
1088 85f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1089 233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
1090 1da177e4SLinus Torvalds
1091 d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1092 1da177e4SLinus Torvalds
1093 3fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
1094 3fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
1095 2441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
1096 c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order
1097 ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1098 86556392SNicolas Pitre	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
1099 2441e78bSNicolas Pitreendif
1100 23121ca2SNicolas Pitre
1101 1f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
1102 1f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
1103 1f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
1104 1f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS
1105 1f50b80aSMasahiro Yamada  KBUILD_MODULES := 1
1106 1f50b80aSMasahiro Yamadaendif
1107 1f50b80aSMasahiro Yamada
1108 07a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1109 07a422bbSMasahiro Yamada
1110 88694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
1111 88694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
1112 88694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
1113 88694cffSQuentin Perret
1114 07a422bbSMasahiro Yamada$(autoksyms_h):
1115 88694cffSQuentin Perret	$(call cmd,autoksyms_h)
1116 23121ca2SNicolas Pitre
1117 fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1118 fbe6e37dSNicholas Piggin
1119 fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1120 fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
1121 d503ac53SMasahiro Yamada	$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
1122 fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1123 2441e78bSNicolas Pitre
1124 3fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1125 1f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1126 741f98feSSam Ravnborg
1127 392885eeSMasahiro Yamadatargets := vmlinux
1128 392885eeSMasahiro Yamada
1129 1da177e4SLinus Torvalds# The actual objects are generated when descending,
1130 1da177e4SLinus Torvalds# make sure no implicit rule kicks in
1131 c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ;
1132 1da177e4SLinus Torvalds
1133 ba97df45SMasahiro Yamadafilechk_kernel.release = \
1134 0d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1135 0d0e7718SMichal Marek
1136 83a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
1137 24512795SMasahiro Yamadainclude/config/kernel.release: FORCE
1138 0d0e7718SMichal Marek	$(call filechk,kernel.release)
1139 cb58455cSSam Ravnborg
1140 d8821622SMasahiro Yamada# Additional helpers built in scripts/
1141 d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1142 d8821622SMasahiro Yamada# in parallel
1143 d8821622SMasahiro YamadaPHONY += scripts
1144 60df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1145 d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1146 cb58455cSSam Ravnborg
1147 1da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
1148 5bb78269SSam Ravnborg# or the modules are listed in "prepare".
1149 5bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
1150 5bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
1151 5bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
1152 1da177e4SLinus Torvalds
1153 a5139fb3SMasahiro YamadaPHONY += prepare archprepare
1154 5bb78269SSam Ravnborg
1155 36de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1156 3044dd05SMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1157 3044dd05SMasahiro Yamada	include/generated/autoconf.h
1158 5bb78269SSam Ravnborg
1159 65bba042SMasahiro Yamadaprepare0: archprepare
1160 60df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
1161 8d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
1162 86feeaa8SSam Ravnborg
1163 1da177e4SLinus Torvalds# All the preparing..
1164 b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1165 b9ab5ebbSJosh Poimboeuf
1166 2c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
1167 7d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1168 7d0e5c20SMasahiro Yamada
1169 2c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
1170 2c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1171 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1172 037fc336SMasahiro Yamada	generic=include/asm-generic
1173 2c1f4f12SMasahiro Yamadauapi-asm-generic:
1174 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1175 037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
1176 2c1f4f12SMasahiro Yamada
1177 b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
1178 3b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1179 ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1180 ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1181 ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1182 ef7cfd00SMasahiro Yamada	@false
1183 ef7cfd00SMasahiro Yamadaelse
1184 ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1185 ef7cfd00SMasahiro Yamadaendif
1186 ef7cfd00SMasahiro Yamadaendif
1187 1da177e4SLinus Torvalds
1188 1da177e4SLinus Torvalds# Generate some files
1189 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1190 1da177e4SLinus Torvalds
1191 1da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
1192 1da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
1193 1da177e4SLinus Torvalds
1194 1da177e4SLinus Torvaldsuts_len := 64
1195 63104eecSSam Ravnborgdefine filechk_utsrelease.h
1196 1da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1197 1da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1198 1da177e4SLinus Torvalds	  exit 1;                                                         \
1199 1da177e4SLinus Torvalds	fi;                                                               \
1200 ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1201 1da177e4SLinus Torvaldsendef
1202 1da177e4SLinus Torvalds
1203 63104eecSSam Ravnborgdefine filechk_version.h
1204 ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
1205 78d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1206 ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1207 63104eecSSam Ravnborgendef
1208 63104eecSSam Ravnborg
1209 43fee2b2SMasahiro Yamada$(version_h): FORCE
1210 1da177e4SLinus Torvalds	$(call filechk,version.h)
1211 223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
1212 1da177e4SLinus Torvalds
1213 273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
1214 63104eecSSam Ravnborg	$(call filechk,utsrelease.h)
1215 63104eecSSam Ravnborg
1216 179efcb4SVegard NossumPHONY += headerdep
1217 179efcb4SVegard Nossumheaderdep:
1218 9663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1219 9663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1220 179efcb4SVegard Nossum
1221 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1222 8d730cfbSDavid Woodhouse# Kernel headers
1223 8d730cfbSDavid Woodhouse
1224 e6883b18SSam Ravnborg#Default location for installed headers
1225 e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1226 e6883b18SSam Ravnborg
1227 59b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1228 59b2bd05SMasahiro Yamada      cmd_headers_install = \
1229 59b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
1230 59b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1231 59b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
1232 6d716275SDavid Woodhouse
1233 8d730cfbSDavid WoodhousePHONY += headers_install
1234 59b2bd05SMasahiro Yamadaheaders_install: headers
1235 59b2bd05SMasahiro Yamada	$(call cmd,headers_install)
1236 4f193362SPaul Smith
1237 1da177e4SLinus TorvaldsPHONY += archheaders archscripts
1238 1da177e4SLinus Torvalds
1239 a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1240 1da177e4SLinus Torvalds
1241 59b2bd05SMasahiro YamadaPHONY += headers
1242 59b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1243 9d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1244 2fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1245 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1246 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1247 1f85712eSMike Frysinger
1248 7ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
1249 68475359SDavid WoodhousePHONY += headers_check
1250 7ecaf069SMasahiro Yamadaheaders_check:
1251 7ecaf069SMasahiro Yamada	@:
1252 68475359SDavid Woodhouse
1253 e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
1254 59b2bd05SMasahiro Yamadaprepare: headers
1255 e949f4c2SMasahiro Yamadaendif
1256 1da177e4SLinus Torvalds
1257 bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1258 bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1259 bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1260 bdd7714bSMasahiro Yamada
1261 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1262 5a5da78bSShuah Khan# Kernel selftest
1263 5a5da78bSShuah Khan
1264 5a5da78bSShuah KhanPHONY += kselftest
1265 5a5da78bSShuah Khankselftest:
1266 2bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1267 5a5da78bSShuah Khan
1268 17eac6c2SShuah Khankselftest-%: FORCE
1269 17eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1270 dcb825a9SWang Long
1271 3d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
1272 3d6dee7aSBamvor Jian Zhangkselftest-merge:
1273 3d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1274 6d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
1275 6d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1276 3e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1277 3d6dee7aSBamvor Jian Zhang
1278 5a5da78bSShuah Khan# ---------------------------------------------------------------------------
1279 37c8a5faSRob Herring# Devicetree files
1280 37c8a5faSRob Herring
1281 37c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1282 37c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
1283 37c8a5faSRob Herringendif
1284 37c8a5faSRob Herring
1285 37c8a5faSRob Herringifneq ($(dtstree),)
1286 37c8a5faSRob Herring
1287 a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
1288 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1289 37c8a5faSRob Herring
1290 c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1291 b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
1292 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
1293 37c8a5faSRob Herring
1294 b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1295 e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1296 b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1297 b5154bf6SMasahiro Yamadaendif
1298 b5154bf6SMasahiro Yamada
1299 b5154bf6SMasahiro Yamadadtbs_check: dtbs
1300 4f0e3a57SRob Herring
1301 37c8a5faSRob Herringdtbs_install:
1302 2431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1303 37c8a5faSRob Herring
1304 37c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
1305 37c8a5faSRob Herringall: dtbs
1306 37c8a5faSRob Herringendif
1307 37c8a5faSRob Herring
1308 37c8a5faSRob Herringendif
1309 37c8a5faSRob Herring
1310 37c8a5faSRob HerringPHONY += scripts_dtc
1311 37c8a5faSRob Herringscripts_dtc: scripts_basic
1312 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
1313 37c8a5faSRob Herring
1314 e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1315 e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1316 e10c4321SMasahiro Yamadaendif
1317 e10c4321SMasahiro Yamada
1318 c473a8d0SMasahiro YamadaPHONY += dt_binding_check
1319 4f0e3a57SRob Herringdt_binding_check: scripts_dtc
1320 4f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1321 4f0e3a57SRob Herring
1322 37c8a5faSRob Herring# ---------------------------------------------------------------------------
1323 1da177e4SLinus Torvalds# Modules
1324 1da177e4SLinus Torvalds
1325 1da177e4SLinus Torvaldsifdef CONFIG_MODULES
1326 1da177e4SLinus Torvalds
1327 1da177e4SLinus Torvalds# By default, build modules as well
1328 1da177e4SLinus Torvalds
1329 73d1393eSMichal Marekall: modules
1330 1da177e4SLinus Torvalds
1331 1da177e4SLinus Torvalds# Build modules
1332 551559e1STejun Heo#
1333 551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1334 551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1335 551559e1STejun Heo# using awk while concatenating to the final file.
1336 1da177e4SLinus Torvalds
1337 4f193362SPaul SmithPHONY += modules
1338 8b41fc44SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order
1339 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1340 3a48a919SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
1341 1da177e4SLinus Torvalds
1342 c99f3918SMasahiro Yamadamodules.order: descend
1343 c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1344 a6c36632SMichal Marek
1345 1da177e4SLinus Torvalds# Target to prepare building external modules
1346 4f193362SPaul SmithPHONY += modules_prepare
1347 059bc9fcSMasahiro Yamadamodules_prepare: prepare
1348 1da177e4SLinus Torvalds
1349 1da177e4SLinus Torvalds# Target to install modules
1350 4f193362SPaul SmithPHONY += modules_install
1351 1da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
1352 1da177e4SLinus Torvalds
1353 4f193362SPaul SmithPHONY += _modinst_
1354 2da30e70SMichal Marek_modinst_:
1355 1da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
1356 1da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
1357 1da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
1358 8e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
1359 1da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1360 1da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
1361 7e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
1362 1da177e4SLinus Torvalds	fi
1363 1bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
1364 8b41fc44SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
1365 898490c0SAlexey Gladkov	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1366 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1367 1da177e4SLinus Torvalds
1368 50a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
1369 1da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
1370 1da177e4SLinus Torvalds# boot script depmod is the master version.
1371 4f193362SPaul SmithPHONY += _modinst_post
1372 6d128e1eSLinus Torvalds_modinst_post: _modinst_
1373 50a8ec31SSam Ravnborg	$(call cmd,depmod)
1374 1da177e4SLinus Torvalds
1375 d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1376 d890f510SJosh BoyerPHONY += modules_sign
1377 d890f510SJosh Boyermodules_sign:
1378 d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1379 d890f510SJosh Boyerendif
1380 d890f510SJosh Boyer
1381 1da177e4SLinus Torvaldselse # CONFIG_MODULES
1382 1da177e4SLinus Torvalds
1383 1da177e4SLinus Torvalds# Modules not configured
1384 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1385 1da177e4SLinus Torvalds
1386 612e47ceSMasahiro YamadaPHONY += modules modules_install
1387 612e47ceSMasahiro Yamadamodules modules_install:
1388 5369f550SMichal Marek	@echo >&2
1389 5369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
1390 5369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
1391 5369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
1392 5369f550SMichal Marek	@echo >&2
1393 1da177e4SLinus Torvalds	@exit 1
1394 1da177e4SLinus Torvalds
1395 1da177e4SLinus Torvaldsendif # CONFIG_MODULES
1396 1da177e4SLinus Torvalds
1397 1da177e4SLinus Torvalds###
1398 1da177e4SLinus Torvalds# Cleaning is done on three levels.
1399 1da177e4SLinus Torvalds# make clean     Delete most generated files
1400 1da177e4SLinus Torvalds#                Leave enough to build external modules
1401 1da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
1402 1da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
1403 1da177e4SLinus Torvalds
1404 1da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1405 0663c68cSMasahiro YamadaCLEAN_FILES += include/ksym \
1406 0663c68cSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps
1407 1da177e4SLinus Torvalds
1408 1da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1409 0663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
1410 46a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
1411 0663c68cSMasahiro Yamada		  debian snap tar-install \
1412 0663c68cSMasahiro Yamada		  .config .config.old .version \
1413 46457133SMasahiro Yamada		  Module.symvers \
1414 fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1415 fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
1416 46a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
1417 46a63d4bSMasahiro Yamada		  *.spec
1418 1da177e4SLinus Torvalds
1419 46457133SMasahiro Yamada# Directories & files removed with 'make distclean'
1420 46457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1421 46457133SMasahiro Yamada
1422 1da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
1423 1da177e4SLinus Torvalds#
1424 1da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1425 1da177e4SLinus Torvalds
1426 76cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
1427 1da177e4SLinus Torvalds
1428 bd1ee804SPawel Mollvmlinuxclean:
1429 bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1430 fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1431 bd1ee804SPawel Moll
1432 bd1ee804SPawel Mollclean: archclean vmlinuxclean
1433 1da177e4SLinus Torvalds
1434 1da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
1435 1da177e4SLinus Torvalds#
1436 1da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1437 cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
1438 1da177e4SLinus Torvalds
1439 b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
1440 1da177e4SLinus Torvalds$(mrproper-dirs):
1441 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1442 1da177e4SLinus Torvalds
1443 b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
1444 1da177e4SLinus Torvalds	$(call cmd,rmfiles)
1445 1da177e4SLinus Torvalds
1446 1da177e4SLinus Torvalds# distclean
1447 1da177e4SLinus Torvalds#
1448 46457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
1449 46457133SMasahiro Yamada
1450 4f193362SPaul SmithPHONY += distclean
1451 1da177e4SLinus Torvalds
1452 1da177e4SLinus Torvaldsdistclean: mrproper
1453 46457133SMasahiro Yamada	$(call cmd,rmfiles)
1454 1da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
1455 1da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1456 f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1457 f78271dfSMasahiro Yamada		-o -name 'core' \) \
1458 1da177e4SLinus Torvalds		-type f -print | xargs rm -f
1459 1da177e4SLinus Torvalds
1460 1da177e4SLinus Torvalds
1461 1da177e4SLinus Torvalds# Packaging of the kernel to various formats
1462 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1463 1da177e4SLinus Torvalds
1464 bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1465 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1466 031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1467 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1468 1da177e4SLinus Torvalds
1469 1da177e4SLinus Torvalds# Brief documentation of the typical targets used
1470 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1471 1da177e4SLinus Torvalds
1472 5dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1473 a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
1474 5dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1475 5dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
1476 1da177e4SLinus Torvalds
1477 fe69b420SMasahiro YamadaPHONY += help
1478 1da177e4SLinus Torvaldshelp:
1479 1da177e4SLinus Torvalds	@echo  'Cleaning targets:'
1480 5ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
1481 5cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
1482 5ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1483 5cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
1484 1da177e4SLinus Torvalds	@echo  ''
1485 1da177e4SLinus Torvalds	@echo  'Configuration targets:'
1486 1da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1487 1da177e4SLinus Torvalds	@echo  ''
1488 1da177e4SLinus Torvalds	@echo  'Other generic targets:'
1489 1da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
1490 1da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
1491 1da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
1492 9cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1493 1da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
1494 40ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1495 433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1496 433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
1497 62718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1498 62718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1499 155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1500 c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
1501 1da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
1502 1da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1503 f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
1504 3f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
1505 3f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
1506 3f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
1507 2fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1508 59df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1509 2fb9b1bdSSam Ravnborg	 echo  ''
1510 31b8cc80SRandy Dunlap	@echo  'Static analysers:'
1511 1da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1512 1da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1513 aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1514 ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1515 295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1516 74425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
1517 7f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
1518 74425eeeSNicolas Palix	@echo  ''
1519 eb8305aeSMatthias Maennich	@echo  'Tools:'
1520 eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1521 eb8305aeSMatthias Maennich	@echo  ''
1522 31b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1523 e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
1524 5a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
1525 5a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1526 e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1527 e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1528 e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1529 dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1530 e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1531 e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
1532 5a5da78bSShuah Khan	@echo  ''
1533 37c8a5faSRob Herring	@$(if $(dtstree), \
1534 37c8a5faSRob Herring		echo 'Devicetree:'; \
1535 37c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
1536 37c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1537 7aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
1538 7aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
1539 37c8a5faSRob Herring		echo '')
1540 37c8a5faSRob Herring
1541 31b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
1542 31b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
1543 31b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
1544 31b8cc80SRandy Dunlap	@echo  ''
1545 1da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1546 000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
1547 1da177e4SLinus Torvalds	@echo  ''
1548 1da177e4SLinus Torvalds	@echo  'Documentation targets:'
1549 cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1550 1da177e4SLinus Torvalds	@echo  ''
1551 01dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
1552 1da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
1553 01dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
1554 1da177e4SLinus Torvalds	@echo  ''
1555 1da177e4SLinus Torvalds	@$(if $(boards), \
1556 1da177e4SLinus Torvalds		$(foreach b, $(boards), \
1557 4234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1558 1da177e4SLinus Torvalds		echo '')
1559 5dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
1560 5dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
1561 5dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1562 5dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
1563 5dffbe81SSegher Boessenkool		echo '')
1564 1da177e4SLinus Torvalds
1565 1da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1566 45d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1567 1da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1568 a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1569 a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1570 701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1571 af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1572 e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
1573 28bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
1574 28bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
1575 28bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1576 a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
1577 1da177e4SLinus Torvalds	@echo  ''
1578 1da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
1579 1da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
1580 1da177e4SLinus Torvalds
1581 1da177e4SLinus Torvalds
1582 5dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
1583 5dffbe81SSegher Boessenkool
1584 5dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
1585 5dffbe81SSegher Boessenkool
1586 fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1587 5dffbe81SSegher Boessenkool
1588 5dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
1589 5dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
1590 5dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
1591 5dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
1592 5dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1593 5dffbe81SSegher Boessenkool		echo '')
1594 5dffbe81SSegher Boessenkool
1595 5dffbe81SSegher Boessenkool
1596 1da177e4SLinus Torvalds# Documentation targets
1597 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1598 e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1599 e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
1600 22cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1601 bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1602 cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
1603 1da177e4SLinus Torvalds
1604 67274c08SMasahiro Yamada# Misc
1605 67274c08SMasahiro Yamada# ---------------------------------------------------------------------------
1606 67274c08SMasahiro Yamada
1607 67274c08SMasahiro YamadaPHONY += scripts_gdb
1608 7a739ce5SMasahiro Yamadascripts_gdb: prepare0
1609 1e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
1610 8d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1611 67274c08SMasahiro Yamada
1612 67274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
1613 67274c08SMasahiro Yamadaall: scripts_gdb
1614 67274c08SMasahiro Yamadaendif
1615 67274c08SMasahiro Yamada
1616 1da177e4SLinus Torvaldselse # KBUILD_EXTMOD
1617 1da177e4SLinus Torvalds
1618 1da177e4SLinus Torvalds###
1619 1da177e4SLinus Torvalds# External module support.
1620 1da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
1621 1da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
1622 1da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
1623 1da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
1624 1da177e4SLinus Torvalds# be used.
1625 1da177e4SLinus Torvalds#
1626 1da177e4SLinus Torvalds# The following are the only valid targets when building external
1627 1da177e4SLinus Torvalds# modules.
1628 1da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
1629 1da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
1630 1da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
1631 1da177e4SLinus Torvalds# make M=dir modules_install
1632 070b98bfSSam Ravnborg#                      Install the modules built in the module directory
1633 1da177e4SLinus Torvalds#                      Assumes install directory is already created
1634 1da177e4SLinus Torvalds
1635 1da177e4SLinus Torvalds# We are always building modules
1636 1da177e4SLinus TorvaldsKBUILD_MODULES := 1
1637 1da177e4SLinus Torvalds
1638 4f193362SPaul SmithPHONY += $(objtree)/Module.symvers
1639 1da177e4SLinus Torvalds$(objtree)/Module.symvers:
1640 1da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
1641 1da177e4SLinus Torvalds	echo; \
1642 1da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1643 1da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
1644 1da177e4SLinus Torvalds	echo )
1645 1da177e4SLinus Torvalds
1646 c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1647 c99f3918SMasahiro YamadaPHONY += modules
1648 c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers
1649 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1650 1da177e4SLinus Torvalds
1651 4f193362SPaul SmithPHONY += modules_install
1652 a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1653 a67dc21aSSam Ravnborg
1654 a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1655 4f193362SPaul SmithPHONY += _emodinst_
1656 a67dc21aSSam Ravnborg_emodinst_:
1657 a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1658 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1659 1da177e4SLinus Torvalds
1660 4f193362SPaul SmithPHONY += _emodinst_post
1661 a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1662 a67dc21aSSam Ravnborg	$(call cmd,depmod)
1663 a67dc21aSSam Ravnborg
1664 76cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
1665 bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
1666 1da177e4SLinus Torvalds
1667 fe69b420SMasahiro YamadaPHONY += help
1668 1da177e4SLinus Torvaldshelp:
1669 1da177e4SLinus Torvalds	@echo  '  Building external modules.'
1670 1da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1671 1da177e4SLinus Torvalds	@echo  ''
1672 1da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
1673 1da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
1674 1da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
1675 1da177e4SLinus Torvalds	@echo  ''
1676 06300b21SSam Ravnborg
1677 059bc9fcSMasahiro YamadaPHONY += prepare
1678 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
1679 1da177e4SLinus Torvalds
1680 b1fbfcb4SMasahiro Yamada# Single targets
1681 b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1682 b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1683 b1fbfcb4SMasahiro Yamada#
1684 b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1685 b1fbfcb4SMasahiro Yamada#
1686 b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1687 b1fbfcb4SMasahiro Yamada#
1688 b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1689 b1fbfcb4SMasahiro Yamada#
1690 b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1691 b1fbfcb4SMasahiro Yamada
1692 b1fbfcb4SMasahiro Yamadaifdef single-build
1693 b1fbfcb4SMasahiro Yamada
1694 b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1695 b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1696 b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1697 b1fbfcb4SMasahiro Yamada
1698 b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1699 b1fbfcb4SMasahiro Yamada	@:
1700 b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1701 b1fbfcb4SMasahiro Yamada	@:
1702 b1fbfcb4SMasahiro Yamada
1703 b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1704 b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1705 b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1706 b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1707 b1fbfcb4SMasahiro Yamadaendif
1708 b1fbfcb4SMasahiro Yamada
1709 b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1710 b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko)
1711 b1fbfcb4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1712 b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1713 b1fbfcb4SMasahiro Yamada
1714 b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1715 b1fbfcb4SMasahiro Yamada
1716 b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1717 b1fbfcb4SMasahiro Yamada
1718 b1fbfcb4SMasahiro Yamada# trim unrelated directories
1719 b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1720 b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1721 b1fbfcb4SMasahiro Yamada
1722 b1fbfcb4SMasahiro Yamadaendif
1723 b1fbfcb4SMasahiro Yamada
1724 c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1725 c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1726 c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1727 c99f3918SMasahiro Yamada# make menuconfig etc.
1728 c99f3918SMasahiro Yamada# Error messages still appears in the original language
1729 c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1730 c99f3918SMasahiro Yamadadescend: $(build-dirs)
1731 c99f3918SMasahiro Yamada$(build-dirs): prepare
1732 b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
1733 f566e1fbSMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \
1734 b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1735 c99f3918SMasahiro Yamada
1736 76cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
1737 76cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
1738 76cd306dSMasahiro Yamada$(clean-dirs):
1739 76cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1740 76cd306dSMasahiro Yamada
1741 88d7be03SMichal Marekclean: $(clean-dirs)
1742 88d7be03SMichal Marek	$(call cmd,rmfiles)
1743 43f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1744 ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1745 4f0e3a57SRob Herring		-o -name '*.ko.*' \
1746 4f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1747 ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1748 bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
1749 88d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1750 9a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
1751 4fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
1752 88d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
1753 8b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
1754 6b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1755 433db3e2SVinícius Tinti		-o -name '*.ll' \
1756 88d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
1757 88d7be03SMichal Marek
1758 1da177e4SLinus Torvalds# Generate tags for editors
1759 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1760 a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1761 858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1762 1da177e4SLinus Torvalds
1763 f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
1764 1da177e4SLinus Torvalds	$(call cmd,tags)
1765 1da177e4SLinus Torvalds
1766 eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1767 eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1768 eb8305aeSMatthias Maennich
1769 eb8305aeSMatthias MaennichPHONY += nsdeps
1770 bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1771 eb8305aeSMatthias Maennichnsdeps: modules
1772 bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1773 eb8305aeSMatthias Maennich
1774 1da177e4SLinus Torvalds# Scripts to check various things for consistency
1775 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1776 1da177e4SLinus Torvalds
1777 279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1778 279f3dd3SPeter Foley
1779 1da177e4SLinus Torvaldsincludecheck:
1780 436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1781 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1782 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1783 1da177e4SLinus Torvalds
1784 1da177e4SLinus Torvaldsversioncheck:
1785 2ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1786 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1787 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1788 1da177e4SLinus Torvalds
1789 74425eeeSNicolas Palixcoccicheck:
1790 858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
1791 74425eeeSNicolas Palix
1792 1da177e4SLinus Torvaldsnamespacecheck:
1793 1da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
1794 1da177e4SLinus Torvalds
1795 295ac051SAdrian Bunkexport_report:
1796 295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1797 295ac051SAdrian Bunk
1798 c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1799 e3ccf6e3SJeff Dike
1800 011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1801 011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1802 011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1803 011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1804 011e3a9aSJeff Dikeifeq ($(ARCH), um)
1805 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1806 011e3a9aSJeff Dikeelse
1807 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1808 011e3a9aSJeff Dikeendif
1809 1da177e4SLinus Torvaldscheckstack:
1810 1da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1811 75dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1812 1da177e4SLinus Torvalds
1813 7b8ea53dSAmerigo Wangkernelrelease:
1814 7b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1815 01ab1788SAmerigo Wang
1816 cb58455cSSam Ravnborgkernelversion:
1817 2244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
1818 1da177e4SLinus Torvalds
1819 c398ff00SMike Marciniszynimage_name:
1820 c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1821 c398ff00SMike Marciniszyn
1822 ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1823 f47a23ceSMasahiro Yamada
1824 f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1825 f47a23ceSMasahiro Yamadatools_silent=s
1826 f47a23ceSMasahiro Yamadaendif
1827 f47a23ceSMasahiro Yamada
1828 ea01fa9fSBorislav Petkovtools/: FORCE
1829 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1830 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1831 ea01fa9fSBorislav Petkov
1832 ea01fa9fSBorislav Petkovtools/%: FORCE
1833 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1834 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1835 ea01fa9fSBorislav Petkov
1836 1da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1837 0663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
1838 1da177e4SLinus Torvalds
1839 bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
1840 50a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1841 569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1842 5a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
1843 50a8ec31SSam Ravnborg
1844 392885eeSMasahiro Yamada# read saved command lines for existing targets
1845 392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
1846 1da177e4SLinus Torvalds
1847 b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
1848 1da177e4SLinus Torvalds
1849 46b7c492SSZ Lin (林上智)endif # config-build
1850 2042b548SMasahiro Yamadaendif # mixed-build
1851 688931a5SMasahiro Yamadaendif # need-sub-make
1852 1da177e4SLinus Torvalds
1853 4f193362SPaul SmithPHONY += FORCE
1854 1da177e4SLinus TorvaldsFORCE:
1855 4f193362SPaul Smith
1856 bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1857 fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
1858 4f193362SPaul Smith.PHONY: $(PHONY)
1859