xref: /openbmc/linux/Makefile (revision 8dfb61dcbaceb19a5ded5e9c9dcf8d05acc32294)
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 := $(M)
219 aa55c8e2SMasahiro Yamadaendif
220 aa55c8e2SMasahiro Yamada
221 e9e81b63SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \
222 e9e81b63SMasahiro Yamada	$(error building multiple external modules is not supported))
223 e9e81b63SMasahiro Yamada
224 051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD
225 051f278eSMasahiro Yamada
226 394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
227 394053f4SMasahiro Yamada
228 25b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
229 9da0763bSMichal Marek        # building in the source tree
230 9da0763bSMichal Marek        srctree := .
231 051f278eSMasahiro Yamada	building_out_of_srctree :=
232 9da0763bSMichal Marekelse
233 25b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
234 9da0763bSMichal Marek                # building in a subdirectory of the source tree
235 9da0763bSMichal Marek                srctree := ..
236 9da0763bSMichal Marek        else
237 25b146c5SMasahiro Yamada                srctree := $(abs_srctree)
238 9da0763bSMichal Marek        endif
239 051f278eSMasahiro Yamada	building_out_of_srctree := 1
240 9da0763bSMichal Marekendif
241 2c1f4f12SMasahiro Yamada
242 95fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
243 95fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
244 95fd3f87SMasahiro Yamadaendif
245 2c1f4f12SMasahiro Yamada
246 7e1c0477SMichal Marekobjtree		:= .
247 6b12de69SMasahiro YamadaVPATH		:= $(srctree)
248 1da177e4SLinus Torvalds
249 051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
250 1da177e4SLinus Torvalds
251 2c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
252 2c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
253 2c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
254 2c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
255 2c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
256 2c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
257 2c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
258 2c1f4f12SMasahiro Yamada
259 2c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
260 2c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
261 2c1f4f12SMasahiro Yamada
262 22340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
263 22340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
264 2c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
265 59b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
266 4623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
267 4623980dSDavid Engraf			 outputmakefile
268 a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \
269 a29d4d8cSMasahiro Yamada			   kernelrelease
270 394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
271 2c1f4f12SMasahiro Yamada
272 2042b548SMasahiro Yamadaconfig-build	:=
273 2042b548SMasahiro Yamadamixed-build	:=
274 2042b548SMasahiro Yamadaneed-config	:= 1
275 d7942413SMasahiro Yamadamay-sync-config	:= 1
276 394053f4SMasahiro Yamadasingle-build	:=
277 2c1f4f12SMasahiro Yamada
278 2c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
279 2c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
280 2042b548SMasahiro Yamada		need-config :=
281 2c1f4f12SMasahiro Yamada	endif
282 2c1f4f12SMasahiro Yamadaendif
283 2c1f4f12SMasahiro Yamada
284 d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
285 d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
286 2042b548SMasahiro Yamada		may-sync-config :=
287 d7942413SMasahiro Yamada	endif
288 d7942413SMasahiro Yamadaendif
289 d7942413SMasahiro Yamada
290 d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
291 2042b548SMasahiro Yamada	may-sync-config :=
292 d7942413SMasahiro Yamadaendif
293 d7942413SMasahiro Yamada
294 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
295 2c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
296 2042b548SMasahiro Yamada		config-build := 1
297 2c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
298 2042b548SMasahiro Yamada			mixed-build := 1
299 2c1f4f12SMasahiro Yamada                endif
300 2c1f4f12SMasahiro Yamada        endif
301 2c1f4f12SMasahiro Yamadaendif
302 22340a06SMasahiro Yamada
303 394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
304 394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
305 394053f4SMasahiro Yamada	single-build := 1
306 394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
307 394053f4SMasahiro Yamada		mixed-build := 1
308 394053f4SMasahiro Yamada	endif
309 394053f4SMasahiro Yamadaendif
310 394053f4SMasahiro Yamada
311 22340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
312 22340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
313 22340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
314 2042b548SMasahiro Yamada		mixed-build := 1
315 22340a06SMasahiro Yamada        endif
316 22340a06SMasahiro Yamadaendif
317 22340a06SMasahiro Yamada
318 2c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
319 2c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
320 2c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
321 2042b548SMasahiro Yamada		mixed-build := 1
322 2c1f4f12SMasahiro Yamada        endif
323 2c1f4f12SMasahiro Yamadaendif
324 2c1f4f12SMasahiro Yamada
325 2042b548SMasahiro Yamadaifdef mixed-build
326 2c1f4f12SMasahiro Yamada# ===========================================================================
327 2c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
328 2c1f4f12SMasahiro Yamada# Handle them one by one.
329 2c1f4f12SMasahiro Yamada
330 2c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
331 2c1f4f12SMasahiro Yamada
332 121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one
333 2c1f4f12SMasahiro Yamada	@:
334 2c1f4f12SMasahiro Yamada
335 2c1f4f12SMasahiro Yamada__build_one_by_one:
336 2c1f4f12SMasahiro Yamada	$(Q)set -e; \
337 2c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
338 2c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
339 2c1f4f12SMasahiro Yamada	done
340 2c1f4f12SMasahiro Yamada
341 2042b548SMasahiro Yamadaelse # !mixed-build
342 2c1f4f12SMasahiro Yamada
343 2c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
344 2c1f4f12SMasahiro Yamada
345 2c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
346 2c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
347 2c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
348 2c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
349 2c1f4f12SMasahiro Yamada
350 b2d35fa5SAnders Roxellinclude scripts/subarch.include
351 1da177e4SLinus Torvalds
352 1da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
353 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
354 1da177e4SLinus Torvalds#
355 1da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
356 1da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
357 1da177e4SLinus Torvalds# ARCH can be set during invocation of make:
358 1da177e4SLinus Torvalds# make ARCH=ia64
359 1da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
360 1da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
361 1da177e4SLinus Torvalds
362 1da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
363 1da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
364 1da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
365 1da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
366 1da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
367 1da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
368 1da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
369 1da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
370 2331d1a6SSam RavnborgARCH		?= $(SUBARCH)
371 1da177e4SLinus Torvalds
372 1da177e4SLinus Torvalds# Architecture as present in compile.h
373 1da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
374 6752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
375 1da177e4SLinus Torvalds
376 d746d647SSam Ravnborg# Additional ARCH settings for x86
377 d746d647SSam Ravnborgifeq ($(ARCH),i386)
378 d746d647SSam Ravnborg        SRCARCH := x86
379 d746d647SSam Ravnborgendif
380 d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
381 d746d647SSam Ravnborg        SRCARCH := x86
382 d746d647SSam Ravnborgendif
383 74b469f2SSam Ravnborg
384 5e538790SSam Ravnborg# Additional ARCH settings for sparc
385 e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
386 e69f58c0SNamhyung Kim       SRCARCH := sparc
387 e69f58c0SNamhyung Kimendif
388 a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
389 5e538790SSam Ravnborg       SRCARCH := sparc
390 a439fe51SSam Ravnborgendif
391 2fb9b1bdSSam Ravnborg
392 3cc000b5SPaul Mundt# Additional ARCH settings for sh
393 3cc000b5SPaul Mundtifeq ($(ARCH),sh64)
394 3cc000b5SPaul Mundt       SRCARCH := sh
395 3cc000b5SPaul Mundtendif
396 3cc000b5SPaul Mundt
397 14cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
398 41263fc6SBen Gardinerexport KCONFIG_CONFIG
399 14cdd3c4SRoman Zippel
400 2a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
401 2a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig
402 2a86f661SMasahiro Yamada
403 1da177e4SLinus Torvalds# SHELL used by kbuild
404 858805b3SMasahiro YamadaCONFIG_SHELL := sh
405 1da177e4SLinus Torvalds
406 6d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
407 6d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
408 6d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
409 d7f14c66SUwe Kleine-König
410 a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
411 a0d1c951SMasahiro YamadaHOSTCC	= clang
412 a0d1c951SMasahiro YamadaHOSTCXX	= clang++
413 a0d1c951SMasahiro Yamadaelse
414 1da177e4SLinus TorvaldsHOSTCC	= gcc
415 1da177e4SLinus TorvaldsHOSTCXX	= g++
416 a0d1c951SMasahiro Yamadaendif
417 7f3a59dbSMasahiro Yamada
418 7f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
419 7f3a59dbSMasahiro Yamada			      -O2 -fomit-frame-pointer -std=gnu89
420 7f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS :=
421 7f3a59dbSMasahiro Yamada
422 7f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS   := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
423 735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
424 f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
425 f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
426 1da177e4SLinus Torvalds
427 1da177e4SLinus Torvalds# Make variables (CC, etc...)
428 1da177e4SLinus TorvaldsCPP		= $(CC) -E
429 a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
430 a0d1c951SMasahiro YamadaCC		= clang
431 a0d1c951SMasahiro YamadaLD		= ld.lld
432 a0d1c951SMasahiro YamadaAR		= llvm-ar
433 a0d1c951SMasahiro YamadaNM		= llvm-nm
434 a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
435 a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
436 a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
437 a0d1c951SMasahiro YamadaOBJSIZE		= llvm-size
438 a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
439 a0d1c951SMasahiro Yamadaelse
440 a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
441 a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
442 1da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
443 1da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
444 1da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
445 1da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
446 eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
447 a0d1c951SMasahiro YamadaOBJSIZE		= $(CROSS_COMPILE)size
448 a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
449 a0d1c951SMasahiro Yamadaendif
450 e83b9f55SAndrii NakryikoPAHOLE		= pahole
451 73a4f6dbSMasahiro YamadaLEX		= flex
452 73a4f6dbSMasahiro YamadaYACC		= bison
453 1da177e4SLinus TorvaldsAWK		= awk
454 caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
455 1da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
456 1da177e4SLinus TorvaldsPERL		= perl
457 011bf125SMasahiro YamadaPYTHON		= python
458 e9781b52SMasahiro YamadaPYTHON3		= python3
459 1da177e4SLinus TorvaldsCHECK		= sparse
460 858805b3SMasahiro YamadaBASH		= bash
461 *8dfb61dcSDenis EfremovGZIP		= gzip
462 *8dfb61dcSDenis EfremovBZIP2		= bzip2
463 *8dfb61dcSDenis EfremovLZOP		= lzop
464 *8dfb61dcSDenis EfremovLZMA		= lzma
465 *8dfb61dcSDenis EfremovLZ4		= lz4c
466 *8dfb61dcSDenis EfremovXZ		= xz
467 *8dfb61dcSDenis Efremov
468 *8dfb61dcSDenis Efremov# GZIP, BZIP2, LZOP env vars are used by the tools. Support them as the command
469 *8dfb61dcSDenis Efremov# line interface, but use _GZIP, _BZIP2, _LZOP internally.
470 *8dfb61dcSDenis Efremov_GZIP          := $(GZIP)
471 *8dfb61dcSDenis Efremov_BZIP2         := $(BZIP2)
472 *8dfb61dcSDenis Efremov_LZOP          := $(LZOP)
473 *8dfb61dcSDenis Efremov
474 *8dfb61dcSDenis Efremov# Reset GZIP, BZIP2, LZOP in this Makefile
475 *8dfb61dcSDenis Efremovoverride GZIP=
476 *8dfb61dcSDenis Efremovoverride BZIP2=
477 *8dfb61dcSDenis Efremovoverride LZOP=
478 *8dfb61dcSDenis Efremov
479 *8dfb61dcSDenis Efremov# Reset GZIP, BZIP2, LZOP in recursive invocations
480 *8dfb61dcSDenis EfremovMAKEOVERRIDES += GZIP= BZIP2= LZOP=
481 1da177e4SLinus Torvalds
482 80a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
483 6c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
484 0c22be07SDouglas AndersonNOSTDINC_FLAGS :=
485 6588169dSSam RavnborgCFLAGS_MODULE   =
486 6588169dSSam RavnborgAFLAGS_MODULE   =
487 6588169dSSam RavnborgLDFLAGS_MODULE  =
488 1da177e4SLinus TorvaldsCFLAGS_KERNEL	=
489 1da177e4SLinus TorvaldsAFLAGS_KERNEL	=
490 b36fad65SMichal MarekLDFLAGS_vmlinux =
491 1da177e4SLinus Torvalds
492 abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
493 abbf1590SDavid HowellsUSERINCLUDE    := \
494 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
495 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
496 abbf1590SDavid Howells		-I$(srctree)/include/uapi \
497 3308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
498 abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
499 abbf1590SDavid Howells
500 1da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
501 1da177e4SLinus Torvalds# Needed to be compatible with the O= option
502 abbf1590SDavid HowellsLINUXINCLUDE    := \
503 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
504 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
505 051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
506 f8224f7fSMasahiro Yamada		-I$(objtree)/include \
507 f8224f7fSMasahiro Yamada		$(USERINCLUDE)
508 1da177e4SLinus Torvalds
509 42a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
510 eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
511 42a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
512 b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
513 51b97e35SKirill A. Shutemov		   -Wno-format-security \
514 433dc2ebSMasahiro Yamada		   -std=gnu89
515 433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
516 80c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
517 80c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
518 6588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
519 6588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
520 10df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
521 10df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
522 d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
523 433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
524 5241ab4cSMasahiro YamadaCLANG_FLAGS :=
525 1da177e4SLinus Torvalds
526 aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
527 eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
528 94f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
529 *8dfb61dcSDenis Efremovexport _GZIP _BZIP2 _LZOP LZMA LZ4 XZ
530 7bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
531 1da177e4SLinus Torvalds
532 d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
533 0e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
534 0e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
535 222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
536 6588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
537 80c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
538 1da177e4SLinus Torvalds
539 1da177e4SLinus Torvalds# Files to ignore in find ... statements
540 1da177e4SLinus Torvalds
541 ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
542 ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
543 ae63b2d7SPrarit Bhargava			  -prune -o
544 450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
545 450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
546 1da177e4SLinus Torvalds
547 1da177e4SLinus Torvalds# ===========================================================================
548 1da177e4SLinus Torvalds# Rules shared between *config targets and build targets
549 1da177e4SLinus Torvalds
550 312a3d09SCao jin# Basic helpers built in scripts/basic/
551 4f193362SPaul SmithPHONY += scripts_basic
552 1da177e4SLinus Torvaldsscripts_basic:
553 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
554 638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
555 1da177e4SLinus Torvalds
556 4f193362SPaul SmithPHONY += outputmakefile
557 e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
558 fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
559 fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
560 fd5f0cd6SJan Beulich# output directory.
561 3a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
562 3a51ff34SVladimir Kondratiev# ignore whole output directory
563 1da177e4SLinus Torvaldsoutputmakefile:
564 051f278eSMasahiro Yamadaifdef building_out_of_srctree
565 e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
566 e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
567 e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
568 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
569 e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
570 e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
571 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
572 e8e83a23SMasahiro Yamada		false; \
573 e8e83a23SMasahiro Yamada	fi
574 92979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
575 4fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
576 156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
577 156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
578 fd5f0cd6SJan Beulichendif
579 1da177e4SLinus Torvalds
580 99516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
581 ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
582 5241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
583 ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
584 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)
585 ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
586 ae6b289aSChris Friesendif
587 ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
588 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
589 ae6b289aSChris Friesendif
590 7e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1)
591 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
592 876a0600SNathan Chancellorendif
593 589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
594 238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
595 238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
596 3bd98050SJoel Stanleyexport CLANG_FLAGS
597 ae6b289aSChris Friesendif
598 ae6b289aSChris Fries
599 315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
600 315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
601 315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
602 315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
603 902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
604 315bab4eSMasahiro Yamada
605 2042b548SMasahiro Yamadaifdef config-build
606 1da177e4SLinus Torvalds# ===========================================================================
607 1da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
608 1da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
609 1da177e4SLinus Torvalds
610 1da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
611 1da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
612 1da177e4SLinus Torvalds# used for 'make defconfig'
613 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
614 315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
615 1da177e4SLinus Torvalds
616 36de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
617 31110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
618 31110ebbSSam Ravnborg
619 36de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
620 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
621 1da177e4SLinus Torvalds
622 2042b548SMasahiro Yamadaelse #!config-build
623 1da177e4SLinus Torvalds# ===========================================================================
624 1da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
625 1da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
626 1da177e4SLinus Torvalds
627 2c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
628 121c2a13SMasahiro Yamada# but instead __all depend on modules
629 2c1f4f12SMasahiro YamadaPHONY += all
630 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
631 121c2a13SMasahiro Yamada__all: all
632 2c1f4f12SMasahiro Yamadaelse
633 121c2a13SMasahiro Yamada__all: modules
634 2c1f4f12SMasahiro Yamadaendif
635 2c1f4f12SMasahiro Yamada
636 2c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
637 2c1f4f12SMasahiro Yamada# Normally, just do built-in.
638 2c1f4f12SMasahiro Yamada
639 2c1f4f12SMasahiro YamadaKBUILD_MODULES :=
640 2c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
641 2c1f4f12SMasahiro Yamada
642 2c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
643 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
644 4b50c8c4SMasahiro Yamada  KBUILD_BUILTIN :=
645 2c1f4f12SMasahiro Yamadaendif
646 2c1f4f12SMasahiro Yamada
647 2c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
648 2c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
649 2c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
650 2c1f4f12SMasahiro Yamada
651 121c2a13SMasahiro Yamadaifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),)
652 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
653 2c1f4f12SMasahiro Yamadaendif
654 2c1f4f12SMasahiro Yamada
655 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
656 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
657 2c1f4f12SMasahiro Yamadaendif
658 2c1f4f12SMasahiro Yamada
659 2c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
660 2c1f4f12SMasahiro Yamada
661 2042b548SMasahiro Yamadaifdef need-config
662 d93a18f2SMasahiro Yamadainclude include/config/auto.conf
663 d93a18f2SMasahiro Yamadaendif
664 d93a18f2SMasahiro Yamada
665 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
666 1da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
667 23febe37SMasahiro Yamadacore-y		:= init/ usr/
668 f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
669 d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
670 95fb6317SMasahiro Yamadadrivers-y	+= net/ virt/
671 1da177e4SLinus Torvaldslibs-y		:= lib/
672 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
673 1da177e4SLinus Torvalds
674 315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
675 315bab4eSMasahiro Yamada# command line.
676 315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
677 315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
678 315bab4eSMasahiro Yamadaall: vmlinux
679 315bab4eSMasahiro Yamada
680 315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
681 315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
682 315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
683 5aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
684 315bab4eSMasahiro Yamada
685 b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
686 b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
687 b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
688 b1f4ff74SPaulo Zanoniendif
689 b1f4ff74SPaulo Zanoni
690 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
691 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
692 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
693 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
694 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
695 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
696 669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
697 669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
698 669e06b1SMasahiro Yamada
699 315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
700 315bab4eSMasahiro Yamada
701 2042b548SMasahiro Yamadaifdef need-config
702 2042b548SMasahiro Yamadaifdef may-sync-config
703 315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
704 315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
705 315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
706 d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
707 1da177e4SLinus Torvalds
708 05850719SMasahiro Yamada$(KCONFIG_CONFIG):
709 05850719SMasahiro Yamada	@echo >&2 '***'
710 05850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
711 05850719SMasahiro Yamada	@echo >&2 '***'
712 05850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
713 05850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
714 05850719SMasahiro Yamada	@echo >&2 '***'
715 05850719SMasahiro Yamada	@/bin/false
716 1da177e4SLinus Torvalds
717 61277981SUlf Magnusson# The actual configuration files used during the build are stored in
718 61277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
719 61277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
720 9390dff6SMasahiro Yamada#
721 9390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
722 9390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
723 f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
724 3044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
725 911a91c3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
726 2042b548SMasahiro Yamadaelse # !may-sync-config
727 d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
728 d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
729 d7942413SMasahiro Yamada# Use auto.conf to trigger the test
730 9ee4e336SSam RavnborgPHONY += include/config/auto.conf
731 9ee4e336SSam Ravnborg
732 9ee4e336SSam Ravnborginclude/config/auto.conf:
733 264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
734 5369f550SMichal Marek	echo >&2;							\
735 5369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
736 5369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
737 5369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
738 5369f550SMichal Marek	echo >&2 ;							\
739 9ee4e336SSam Ravnborg	/bin/false)
740 9ee4e336SSam Ravnborg
741 d7942413SMasahiro Yamadaendif # may-sync-config
742 2042b548SMasahiro Yamadaendif # need-config
743 1da177e4SLinus Torvalds
744 a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
745 ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
746 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
747 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
748 6f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
749 a1c48bb1SGeert Uytterhoeven
750 15f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
751 a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
752 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
753 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
754 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
755 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
756 1da177e4SLinus Torvaldsendif
757 1da177e4SLinus Torvalds
758 69102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
759 69102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
760 b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
761 69102311SJiri Kosina
762 d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov
763 6b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
764 6b90bd4bSEmese Revfy
765 1873e870SAndi Kleenifdef CONFIG_READABLE_ASM
766 1873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
767 1873e870SAndi Kleen# reorder blocks reorders the control in the function
768 1873e870SAndi Kleen# ipa clone creates specialized cloned functions
769 1873e870SAndi Kleen# partial inlining inlines only parts of functions
770 1873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
771 1873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
772 1873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
773 1873e870SAndi Kleenendif
774 1873e870SAndi Kleen
775 08f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
776 a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
777 35bb5b1eSAndi Kleenendif
778 35bb5b1eSAndi Kleen
779 2a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
780 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
781 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
782 2a61f474SMasahiro Yamada
783 2a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
784 e06b8b98SSam Ravnborg
785 076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
786 a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
787 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
788 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
789 cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
790 cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
791 cfe17c9bSMasahiro Yamada# See modpost pattern 2
792 a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
793 cfe17c9bSMasahiro Yamadaelse
794 cfe17c9bSMasahiro Yamada
795 cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
796 cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
797 9df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
798 e2079e93SNathan Chancellor
799 e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
800 e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
801 e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
802 e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
803 cfe17c9bSMasahiro Yamadaendif
804 cfe17c9bSMasahiro Yamada
805 0a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
806 1da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
807 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
808 1da177e4SLinus Torvaldselse
809 7e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
810 7e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
811 7e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
812 7e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
813 7e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
814 7e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
815 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
816 1da177e4SLinus Torvaldsendif
817 7e9501fdSRabin Vincentendif
818 1da177e4SLinus Torvalds
819 709a972eSKees Cook# Initialize all stack variables with a pattern, if desired.
820 709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL
821 709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
822 709a972eSKees Cookendif
823 709a972eSKees Cook
824 1e88e415SMasahiro YamadaDEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
825 2062afb4SLinus Torvalds
826 1da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
827 866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
828 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
829 866ced95SAndi Kleenelse
830 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
831 866ced95SAndi Kleenendif
832 2288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
833 1da177e4SLinus Torvaldsendif
834 bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
835 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
836 bfaf2dd3SAndi Kleenendif
837 1da177e4SLinus Torvalds
838 d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
839 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
840 e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
841 d6f4ceb7SAndi Kleenendif
842 d6f4ceb7SAndi Kleen
843 10e68b02SNick Desaulniersifdef CONFIG_DEBUG_INFO_COMPRESSED
844 10e68b02SNick DesaulniersDEBUG_CFLAGS	+= -gz=zlib
845 10e68b02SNick DesaulniersKBUILD_AFLAGS	+= -Wa,--compress-debug-sections=zlib
846 10e68b02SNick DesaulniersKBUILD_LDFLAGS	+= --compress-debug-sections=zlib
847 10e68b02SNick Desaulniersendif
848 10e68b02SNick Desaulniers
849 1e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
850 1e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
851 1e88e415SMasahiro Yamada
852 606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
853 07d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
854 07d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
855 07d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
856 07d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
857 07d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
858 a2546faeSSteven Rostedt  endif
859 2f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
860 2f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
861 2f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
862 2f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
863 2f4df001SVasily Gorbik    endif
864 2f4df001SVasily Gorbik  endif
865 07d04081SVasily Gorbikendif
866 a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
867 f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
868 f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
869 f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
870 a2546faeSSteven Rostedt  endif
871 f28bc3c3SVasily Gorbikendif
872 f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
873 f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
874 f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
875 72441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
876 cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
877 72441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
878 72441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
879 72441cb1SSteven Rostedt	endif
880 72441cb1SSteven Rostedtendif
881 16444a8aSArnaldo Carvalho de Meloendif
882 16444a8aSArnaldo Carvalho de Melo
883 91341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
884 91341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
885 91341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
886 91341d4bSSam Ravnborgendif
887 91341d4bSSam Ravnborg
888 90ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
889 e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
890 e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
891 90ad4052SMasahiro Yamadaendif
892 90ad4052SMasahiro Yamada
893 43bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH
894 43bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
895 43bd3a95SMiroslav Benesendif
896 43bd3a95SMiroslav Benes
897 e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
898 e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
899 e8e69931SSam Ravnborg
900 1da177e4SLinus Torvalds# warn about C99 declaration after statement
901 a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
902 1da177e4SLinus Torvalds
903 0bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
904 8289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
905 0bb95f80SKees Cook
906 070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
907 fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
908 1da177e4SLinus Torvalds
909 217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
910 217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
911 217c3e01SStephen Rothwell
912 5c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
913 5c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
914 44720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
915 5a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
916 5c45de21SLinus Torvalds
917 adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
918 adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
919 adc71920SLinus Torvalds
920 78a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
921 78a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
922 78a5255fSLinus Torvalds
923 fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
924 a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
925 d0115552SLinus Torvalds
926 87e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this
927 87e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we
928 87e0d4f0SDaniel Borkmann# need to disable it here generally.
929 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fno-merge-all-constants)
930 87e0d4f0SDaniel Borkmann
931 87e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine
932 87e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled.
933 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fmerge-constants)
934 87e0d4f0SDaniel Borkmann
935 3ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
936 3ce120b1SLinus TorvaldsKBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
937 3ce120b1SLinus Torvalds
938 8f7f5c9fSAndi Kleen# conserve stack if available
939 8f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
940 8f7f5c9fSAndi Kleen
941 fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
942 fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
943 fe7c36c7SJosh Triplett
944 ea8daa7bSDaniel Wagner# enforce correct pointer usage
945 ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
946 ea8daa7bSDaniel Wagner
947 c834f0e8SKees Cook# Require designated initializers for all marked structures
948 c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
949 c834f0e8SKees Cook
950 a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
951 a73619a8SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
952 a73619a8SMasahiro Yamada
953 29be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is
954 29be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern
955 29be86d7SSeth Forsheeifdef CONFIG_RETPOLINE
956 29be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
957 29be86d7SSeth Forsheeendif
958 29be86d7SSeth Forshee
959 a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
960 a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
961 c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
962 a86fe353SMasahiro Yamada
963 8cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
964 8cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
965 8cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
966 8cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
967 52bcc330SSam Ravnborg
968 89ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id
969 89ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id
970 18991197SRoland McGrath
971 5d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
972 d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
973 5d7d18f5SDavid Howellsendif
974 5d7d18f5SDavid Howells
975 5cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
976 5cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
977 5cf896fbSPeter Collingbourneendif
978 5cf896fbSPeter Collingbourne
979 7f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
980 7f3a59dbSMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64, $(KBUILD_CFLAGS))
981 7f3a59dbSMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS))
982 7f3a59dbSMasahiro Yamada
983 80591e61SLuc Van Oostenryck# make the checker run with the right architecture
984 80591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
985 80591e61SLuc Van Oostenryck
986 14516765SLuc Van Oostenryck# insure the checker run with the right endianness
987 14516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
988 14516765SLuc Van Oostenryck
989 1f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
990 1f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
991 1f2f01b1SLuc Van Oostenryck
992 1da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
993 1da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
994 1da177e4SLinus Torvalds# set in the environment
995 1da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
996 1da177e4SLinus Torvalds# this default value
997 1da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
998 1da177e4SLinus Torvalds
999 1da177e4SLinus Torvalds#
1000 1da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
1001 1da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
1002 1da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
1003 1da177e4SLinus Torvalds
1004 1da177e4SLinus Torvalds#
1005 f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1006 f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1007 f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
1008 f4d4ffc0SJason Cooper#
1009 f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1010 f4d4ffc0SJason Cooper
1011 f4d4ffc0SJason Cooper#
1012 1da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1013 1da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
1014 070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
1015 1da177e4SLinus Torvalds#
1016 1da177e4SLinus Torvalds
1017 df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1018 1da177e4SLinus Torvaldsexport MODLIB
1019 1da177e4SLinus Torvalds
1020 ac031f26STheodore Ts'o#
1021 2ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
1022 2ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
1023 2ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
1024 177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
1025 2ea03891SSam Ravnborg
1026 ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
1027 ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
1028 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
1029 ac031f26STheodore Ts'oelse
1030 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
1031 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
1032 ac031f26STheodore Ts'oelse
1033 2ea03891SSam Ravnborgmod_strip_cmd = true
1034 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
1035 ac031f26STheodore Ts'oexport mod_strip_cmd
1036 ac031f26STheodore Ts'o
1037 beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
1038 beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
1039 beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
1040 beb50df3SBertrand Jacquin
1041 beb50df3SBertrand Jacquinmod_compress_cmd = true
1042 beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
1043 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
1044 *8dfb61dcSDenis Efremov    mod_compress_cmd = $(_GZIP) -n -f
1045 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
1046 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
1047 *8dfb61dcSDenis Efremov    mod_compress_cmd = $(XZ) -f
1048 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
1049 beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
1050 beb50df3SBertrand Jacquinexport mod_compress_cmd
1051 beb50df3SBertrand Jacquin
1052 d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
1053 3ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
1054 3ee550f1SDavid Woodhouse
1055 3ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1056 e2a666d5SRusty Russellelse
1057 e2a666d5SRusty Russellmod_sign_cmd = true
1058 e2a666d5SRusty Russellendif
1059 e2a666d5SRusty Russellexport mod_sign_cmd
1060 e2a666d5SRusty Russell
1061 056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1062 056d28d1SRolf Eike Beer
1063 9f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
1064 9f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
1065 056d28d1SRolf Eike Beer		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1066 9f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
1067 9f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
1068 9f0c18aeSJosh Poimboeuf  else
1069 9f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
1070 9f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
1071 9f0c18aeSJosh Poimboeuf  endif
1072 9f0c18aeSJosh Poimboeufendif
1073 9f0c18aeSJosh Poimboeuf
1074 e00d8880SMasahiro YamadaPHONY += prepare0
1075 e2a666d5SRusty Russell
1076 394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
1077 bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
1078 47801c97SMasahiro Yamada
1079 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1080 cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1081 1da177e4SLinus Torvalds
1082 23febe37SMasahiro Yamadavmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
1083 1da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
1084 95fb6317SMasahiro Yamada		     $(libs-y) $(libs-m)))
1085 1da177e4SLinus Torvalds
1086 1eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
1087 23febe37SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(core-) \
1088 95fb6317SMasahiro Yamada			$(drivers-) $(libs-))))
1089 1da177e4SLinus Torvalds
1090 b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \
1091 b2c88554SMasahiro Yamada			$(core-y) $(core-m) $(libs-y) $(libs-m) \
1092 b2c88554SMasahiro Yamada			$(drivers-y) $(drivers-m)))
1093 b2c88554SMasahiro Yamada
1094 c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
1095 76cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1096 c99f3918SMasahiro Yamada
1097 1f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1098 f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1099 f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1100 f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES
1101 f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1102 f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1103 f0d50ca0SMasahiro Yamadaelse
1104 f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1105 f0d50ca0SMasahiro Yamadaendif
1106 f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1107 f0d50ca0SMasahiro Yamada
1108 f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
1109 95698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
1110 1f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
1111 85f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1112 233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
1113 1da177e4SLinus Torvalds
1114 d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1115 1da177e4SLinus Torvalds
1116 3fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
1117 3fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
1118 2441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
1119 1f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
1120 1f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
1121 1f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
1122 1f50b80aSMasahiro YamadaKBUILD_MODULES := 1
1123 fb2d99beSMasahiro Yamada
1124 fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order
1125 fb2d99beSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1126 fb2d99beSMasahiro Yamada	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
1127 1f50b80aSMasahiro Yamadaendif
1128 1f50b80aSMasahiro Yamada
1129 07a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1130 07a422bbSMasahiro Yamada
1131 88694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
1132 88694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
1133 88694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
1134 88694cffSQuentin Perret
1135 07a422bbSMasahiro Yamada$(autoksyms_h):
1136 88694cffSQuentin Perret	$(call cmd,autoksyms_h)
1137 23121ca2SNicolas Pitre
1138 fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1139 fbe6e37dSNicholas Piggin
1140 fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1141 fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
1142 d503ac53SMasahiro Yamada	$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
1143 fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1144 2441e78bSNicolas Pitre
1145 3fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1146 1f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1147 741f98feSSam Ravnborg
1148 392885eeSMasahiro Yamadatargets := vmlinux
1149 392885eeSMasahiro Yamada
1150 1da177e4SLinus Torvalds# The actual objects are generated when descending,
1151 1da177e4SLinus Torvalds# make sure no implicit rule kicks in
1152 b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
1153 1da177e4SLinus Torvalds
1154 ba97df45SMasahiro Yamadafilechk_kernel.release = \
1155 0d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1156 0d0e7718SMichal Marek
1157 83a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
1158 24512795SMasahiro Yamadainclude/config/kernel.release: FORCE
1159 0d0e7718SMichal Marek	$(call filechk,kernel.release)
1160 cb58455cSSam Ravnborg
1161 d8821622SMasahiro Yamada# Additional helpers built in scripts/
1162 d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1163 d8821622SMasahiro Yamada# in parallel
1164 d8821622SMasahiro YamadaPHONY += scripts
1165 60df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1166 d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1167 cb58455cSSam Ravnborg
1168 1da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
1169 5bb78269SSam Ravnborg# or the modules are listed in "prepare".
1170 5bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
1171 5bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
1172 5bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
1173 1da177e4SLinus Torvalds
1174 a5139fb3SMasahiro YamadaPHONY += prepare archprepare
1175 5bb78269SSam Ravnborg
1176 36de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1177 3044dd05SMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1178 3044dd05SMasahiro Yamada	include/generated/autoconf.h
1179 5bb78269SSam Ravnborg
1180 65bba042SMasahiro Yamadaprepare0: archprepare
1181 60df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
1182 8d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
1183 86feeaa8SSam Ravnborg
1184 1da177e4SLinus Torvalds# All the preparing..
1185 b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1186 b9ab5ebbSJosh Poimboeuf
1187 2c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
1188 7d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1189 7d0e5c20SMasahiro Yamada
1190 2c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
1191 2c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1192 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1193 037fc336SMasahiro Yamada	generic=include/asm-generic
1194 2c1f4f12SMasahiro Yamadauapi-asm-generic:
1195 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1196 037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
1197 2c1f4f12SMasahiro Yamada
1198 b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
1199 3b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1200 ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1201 ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1202 ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1203 ef7cfd00SMasahiro Yamada	@false
1204 ef7cfd00SMasahiro Yamadaelse
1205 ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1206 ef7cfd00SMasahiro Yamadaendif
1207 ef7cfd00SMasahiro Yamadaendif
1208 1da177e4SLinus Torvalds
1209 1da177e4SLinus Torvalds# Generate some files
1210 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1211 1da177e4SLinus Torvalds
1212 1da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
1213 1da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
1214 1da177e4SLinus Torvalds
1215 1da177e4SLinus Torvaldsuts_len := 64
1216 63104eecSSam Ravnborgdefine filechk_utsrelease.h
1217 1da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1218 1da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1219 1da177e4SLinus Torvalds	  exit 1;                                                         \
1220 1da177e4SLinus Torvalds	fi;                                                               \
1221 ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1222 1da177e4SLinus Torvaldsendef
1223 1da177e4SLinus Torvalds
1224 63104eecSSam Ravnborgdefine filechk_version.h
1225 ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
1226 78d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1227 ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1228 63104eecSSam Ravnborgendef
1229 63104eecSSam Ravnborg
1230 43fee2b2SMasahiro Yamada$(version_h): FORCE
1231 1da177e4SLinus Torvalds	$(call filechk,version.h)
1232 223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
1233 1da177e4SLinus Torvalds
1234 273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
1235 63104eecSSam Ravnborg	$(call filechk,utsrelease.h)
1236 63104eecSSam Ravnborg
1237 179efcb4SVegard NossumPHONY += headerdep
1238 179efcb4SVegard Nossumheaderdep:
1239 9663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1240 9663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1241 179efcb4SVegard Nossum
1242 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1243 8d730cfbSDavid Woodhouse# Kernel headers
1244 8d730cfbSDavid Woodhouse
1245 e6883b18SSam Ravnborg#Default location for installed headers
1246 e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1247 e6883b18SSam Ravnborg
1248 59b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1249 59b2bd05SMasahiro Yamada      cmd_headers_install = \
1250 59b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
1251 59b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1252 59b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
1253 6d716275SDavid Woodhouse
1254 8d730cfbSDavid WoodhousePHONY += headers_install
1255 59b2bd05SMasahiro Yamadaheaders_install: headers
1256 59b2bd05SMasahiro Yamada	$(call cmd,headers_install)
1257 4f193362SPaul Smith
1258 1da177e4SLinus TorvaldsPHONY += archheaders archscripts
1259 1da177e4SLinus Torvalds
1260 a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1261 1da177e4SLinus Torvalds
1262 59b2bd05SMasahiro YamadaPHONY += headers
1263 59b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1264 9d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1265 2fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1266 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1267 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1268 1f85712eSMike Frysinger
1269 7ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
1270 68475359SDavid WoodhousePHONY += headers_check
1271 7ecaf069SMasahiro Yamadaheaders_check:
1272 7ecaf069SMasahiro Yamada	@:
1273 68475359SDavid Woodhouse
1274 e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
1275 59b2bd05SMasahiro Yamadaprepare: headers
1276 e949f4c2SMasahiro Yamadaendif
1277 1da177e4SLinus Torvalds
1278 bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1279 bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1280 bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1281 bdd7714bSMasahiro Yamada
1282 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1283 5a5da78bSShuah Khan# Kernel selftest
1284 5a5da78bSShuah Khan
1285 5a5da78bSShuah KhanPHONY += kselftest
1286 5a5da78bSShuah Khankselftest:
1287 2bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1288 5a5da78bSShuah Khan
1289 17eac6c2SShuah Khankselftest-%: FORCE
1290 17eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1291 dcb825a9SWang Long
1292 3d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
1293 3d6dee7aSBamvor Jian Zhangkselftest-merge:
1294 3d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1295 6d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
1296 6d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1297 3e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1298 3d6dee7aSBamvor Jian Zhang
1299 5a5da78bSShuah Khan# ---------------------------------------------------------------------------
1300 37c8a5faSRob Herring# Devicetree files
1301 37c8a5faSRob Herring
1302 37c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1303 37c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
1304 37c8a5faSRob Herringendif
1305 37c8a5faSRob Herring
1306 37c8a5faSRob Herringifneq ($(dtstree),)
1307 37c8a5faSRob Herring
1308 a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
1309 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1310 37c8a5faSRob Herring
1311 c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1312 b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
1313 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
1314 37c8a5faSRob Herring
1315 b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1316 e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1317 b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1318 b5154bf6SMasahiro Yamadaendif
1319 b5154bf6SMasahiro Yamada
1320 b5154bf6SMasahiro Yamadadtbs_check: dtbs
1321 4f0e3a57SRob Herring
1322 37c8a5faSRob Herringdtbs_install:
1323 2431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1324 37c8a5faSRob Herring
1325 37c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
1326 37c8a5faSRob Herringall: dtbs
1327 37c8a5faSRob Herringendif
1328 37c8a5faSRob Herring
1329 37c8a5faSRob Herringendif
1330 37c8a5faSRob Herring
1331 37c8a5faSRob HerringPHONY += scripts_dtc
1332 37c8a5faSRob Herringscripts_dtc: scripts_basic
1333 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
1334 37c8a5faSRob Herring
1335 e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1336 e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1337 e10c4321SMasahiro Yamadaendif
1338 e10c4321SMasahiro Yamada
1339 c473a8d0SMasahiro YamadaPHONY += dt_binding_check
1340 4f0e3a57SRob Herringdt_binding_check: scripts_dtc
1341 4f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1342 4f0e3a57SRob Herring
1343 37c8a5faSRob Herring# ---------------------------------------------------------------------------
1344 1da177e4SLinus Torvalds# Modules
1345 1da177e4SLinus Torvalds
1346 e0b250b5SJonas Zeiger# install modules.builtin regardless of CONFIG_MODULES
1347 e0b250b5SJonas ZeigerPHONY += _builtin_inst_
1348 e0b250b5SJonas Zeiger_builtin_inst_:
1349 e0b250b5SJonas Zeiger	@mkdir -p $(MODLIB)/
1350 e0b250b5SJonas Zeiger	@cp -f modules.builtin $(MODLIB)/
1351 e0b250b5SJonas Zeiger	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1352 e0b250b5SJonas Zeiger
1353 e0b250b5SJonas ZeigerPHONY += install
1354 e0b250b5SJonas Zeigerinstall: _builtin_inst_
1355 e0b250b5SJonas Zeiger
1356 1da177e4SLinus Torvaldsifdef CONFIG_MODULES
1357 1da177e4SLinus Torvalds
1358 1da177e4SLinus Torvalds# By default, build modules as well
1359 1da177e4SLinus Torvalds
1360 73d1393eSMichal Marekall: modules
1361 1da177e4SLinus Torvalds
1362 4b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider
1363 4b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to
1364 4b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them.
1365 4b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS
1366 4b50c8c4SMasahiro Yamada  KBUILD_BUILTIN := 1
1367 4b50c8c4SMasahiro Yamadaendif
1368 4b50c8c4SMasahiro Yamada
1369 1da177e4SLinus Torvalds# Build modules
1370 551559e1STejun Heo#
1371 551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1372 551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1373 551559e1STejun Heo# using awk while concatenating to the final file.
1374 1da177e4SLinus Torvalds
1375 4f193362SPaul SmithPHONY += modules
1376 8451791dSMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check
1377 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1378 8451791dSMasahiro Yamada
1379 8451791dSMasahiro YamadaPHONY += modules_check
1380 8451791dSMasahiro Yamadamodules_check: modules.order
1381 8451791dSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1382 1da177e4SLinus Torvalds
1383 b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1384 b2c88554SMasahiro Yamada
1385 b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE
1386 b2c88554SMasahiro Yamada	$(call if_changed,modules_order)
1387 b2c88554SMasahiro Yamada
1388 b2c88554SMasahiro Yamadatargets += modules.order
1389 a6c36632SMichal Marek
1390 1da177e4SLinus Torvalds# Target to prepare building external modules
1391 4f193362SPaul SmithPHONY += modules_prepare
1392 059bc9fcSMasahiro Yamadamodules_prepare: prepare
1393 1da177e4SLinus Torvalds
1394 1da177e4SLinus Torvalds# Target to install modules
1395 4f193362SPaul SmithPHONY += modules_install
1396 1da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
1397 1da177e4SLinus Torvalds
1398 4f193362SPaul SmithPHONY += _modinst_
1399 e0b250b5SJonas Zeiger_modinst_: _builtin_inst_
1400 1da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
1401 1da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
1402 1da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
1403 8e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
1404 1da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1405 1da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
1406 7e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
1407 1da177e4SLinus Torvalds	fi
1408 1bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
1409 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1410 1da177e4SLinus Torvalds
1411 50a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
1412 1da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
1413 1da177e4SLinus Torvalds# boot script depmod is the master version.
1414 4f193362SPaul SmithPHONY += _modinst_post
1415 6d128e1eSLinus Torvalds_modinst_post: _modinst_
1416 50a8ec31SSam Ravnborg	$(call cmd,depmod)
1417 1da177e4SLinus Torvalds
1418 d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1419 d890f510SJosh BoyerPHONY += modules_sign
1420 d890f510SJosh Boyermodules_sign:
1421 d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1422 d890f510SJosh Boyerendif
1423 d890f510SJosh Boyer
1424 1da177e4SLinus Torvaldselse # CONFIG_MODULES
1425 1da177e4SLinus Torvalds
1426 1da177e4SLinus Torvalds# Modules not configured
1427 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1428 1da177e4SLinus Torvalds
1429 612e47ceSMasahiro YamadaPHONY += modules modules_install
1430 612e47ceSMasahiro Yamadamodules modules_install:
1431 5369f550SMichal Marek	@echo >&2
1432 5369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
1433 5369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
1434 5369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
1435 5369f550SMichal Marek	@echo >&2
1436 1da177e4SLinus Torvalds	@exit 1
1437 1da177e4SLinus Torvalds
1438 1da177e4SLinus Torvaldsendif # CONFIG_MODULES
1439 1da177e4SLinus Torvalds
1440 1da177e4SLinus Torvalds###
1441 1da177e4SLinus Torvalds# Cleaning is done on three levels.
1442 1da177e4SLinus Torvalds# make clean     Delete most generated files
1443 1da177e4SLinus Torvalds#                Leave enough to build external modules
1444 1da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
1445 1da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
1446 1da177e4SLinus Torvalds
1447 1da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1448 269a535cSMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers \
1449 0663c68cSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps
1450 1da177e4SLinus Torvalds
1451 1da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1452 0663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
1453 46a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
1454 0663c68cSMasahiro Yamada		  debian snap tar-install \
1455 0663c68cSMasahiro Yamada		  .config .config.old .version \
1456 46457133SMasahiro Yamada		  Module.symvers \
1457 fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1458 fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
1459 46a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
1460 46a63d4bSMasahiro Yamada		  *.spec
1461 1da177e4SLinus Torvalds
1462 46457133SMasahiro Yamada# Directories & files removed with 'make distclean'
1463 46457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1464 46457133SMasahiro Yamada
1465 1da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
1466 1da177e4SLinus Torvalds#
1467 1da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1468 1da177e4SLinus Torvalds
1469 76cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
1470 1da177e4SLinus Torvalds
1471 bd1ee804SPawel Mollvmlinuxclean:
1472 bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1473 fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1474 bd1ee804SPawel Moll
1475 bd1ee804SPawel Mollclean: archclean vmlinuxclean
1476 1da177e4SLinus Torvalds
1477 1da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
1478 1da177e4SLinus Torvalds#
1479 1da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1480 cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
1481 1da177e4SLinus Torvalds
1482 b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
1483 1da177e4SLinus Torvalds$(mrproper-dirs):
1484 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1485 1da177e4SLinus Torvalds
1486 b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
1487 1da177e4SLinus Torvalds	$(call cmd,rmfiles)
1488 1da177e4SLinus Torvalds
1489 1da177e4SLinus Torvalds# distclean
1490 1da177e4SLinus Torvalds#
1491 46457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
1492 46457133SMasahiro Yamada
1493 4f193362SPaul SmithPHONY += distclean
1494 1da177e4SLinus Torvalds
1495 1da177e4SLinus Torvaldsdistclean: mrproper
1496 46457133SMasahiro Yamada	$(call cmd,rmfiles)
1497 1da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
1498 1da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1499 f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1500 f78271dfSMasahiro Yamada		-o -name 'core' \) \
1501 1da177e4SLinus Torvalds		-type f -print | xargs rm -f
1502 1da177e4SLinus Torvalds
1503 1da177e4SLinus Torvalds
1504 1da177e4SLinus Torvalds# Packaging of the kernel to various formats
1505 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1506 1da177e4SLinus Torvalds
1507 bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1508 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1509 031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1510 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1511 1da177e4SLinus Torvalds
1512 1da177e4SLinus Torvalds# Brief documentation of the typical targets used
1513 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1514 1da177e4SLinus Torvalds
1515 5dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1516 a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
1517 5dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1518 5dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
1519 1da177e4SLinus Torvalds
1520 fe69b420SMasahiro YamadaPHONY += help
1521 1da177e4SLinus Torvaldshelp:
1522 1da177e4SLinus Torvalds	@echo  'Cleaning targets:'
1523 5ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
1524 5cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
1525 5ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1526 5cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
1527 1da177e4SLinus Torvalds	@echo  ''
1528 1da177e4SLinus Torvalds	@echo  'Configuration targets:'
1529 1da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1530 1da177e4SLinus Torvalds	@echo  ''
1531 1da177e4SLinus Torvalds	@echo  'Other generic targets:'
1532 1da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
1533 1da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
1534 1da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
1535 9cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1536 1da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
1537 40ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1538 433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1539 433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
1540 62718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1541 62718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1542 155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1543 c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
1544 1da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
1545 1da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1546 f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
1547 3f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
1548 3f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
1549 3f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
1550 2fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1551 59df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1552 2fb9b1bdSSam Ravnborg	 echo  ''
1553 31b8cc80SRandy Dunlap	@echo  'Static analysers:'
1554 1da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1555 1da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1556 aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1557 ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1558 295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1559 74425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
1560 7f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
1561 74425eeeSNicolas Palix	@echo  ''
1562 eb8305aeSMatthias Maennich	@echo  'Tools:'
1563 eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1564 eb8305aeSMatthias Maennich	@echo  ''
1565 31b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1566 e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
1567 5a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
1568 5a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1569 e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1570 e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1571 e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1572 dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1573 e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1574 e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
1575 5a5da78bSShuah Khan	@echo  ''
1576 37c8a5faSRob Herring	@$(if $(dtstree), \
1577 37c8a5faSRob Herring		echo 'Devicetree:'; \
1578 37c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
1579 37c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1580 7aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
1581 7aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
1582 37c8a5faSRob Herring		echo '')
1583 37c8a5faSRob Herring
1584 31b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
1585 31b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
1586 31b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
1587 31b8cc80SRandy Dunlap	@echo  ''
1588 1da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1589 000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
1590 1da177e4SLinus Torvalds	@echo  ''
1591 1da177e4SLinus Torvalds	@echo  'Documentation targets:'
1592 cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1593 1da177e4SLinus Torvalds	@echo  ''
1594 01dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
1595 1da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
1596 01dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
1597 1da177e4SLinus Torvalds	@echo  ''
1598 1da177e4SLinus Torvalds	@$(if $(boards), \
1599 1da177e4SLinus Torvalds		$(foreach b, $(boards), \
1600 4234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1601 1da177e4SLinus Torvalds		echo '')
1602 5dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
1603 5dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
1604 5dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1605 5dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
1606 5dffbe81SSegher Boessenkool		echo '')
1607 1da177e4SLinus Torvalds
1608 1da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1609 45d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1610 1da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1611 a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1612 a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1613 701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1614 af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1615 e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
1616 28bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
1617 28bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
1618 28bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1619 a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
1620 1da177e4SLinus Torvalds	@echo  ''
1621 1da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
1622 1da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
1623 1da177e4SLinus Torvalds
1624 1da177e4SLinus Torvalds
1625 5dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
1626 5dffbe81SSegher Boessenkool
1627 5dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
1628 5dffbe81SSegher Boessenkool
1629 fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1630 5dffbe81SSegher Boessenkool
1631 5dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
1632 5dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
1633 5dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
1634 5dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
1635 5dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1636 5dffbe81SSegher Boessenkool		echo '')
1637 5dffbe81SSegher Boessenkool
1638 5dffbe81SSegher Boessenkool
1639 1da177e4SLinus Torvalds# Documentation targets
1640 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1641 e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1642 e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
1643 22cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1644 bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1645 cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
1646 1da177e4SLinus Torvalds
1647 67274c08SMasahiro Yamada# Misc
1648 67274c08SMasahiro Yamada# ---------------------------------------------------------------------------
1649 67274c08SMasahiro Yamada
1650 67274c08SMasahiro YamadaPHONY += scripts_gdb
1651 7a739ce5SMasahiro Yamadascripts_gdb: prepare0
1652 1e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
1653 8d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1654 67274c08SMasahiro Yamada
1655 67274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
1656 67274c08SMasahiro Yamadaall: scripts_gdb
1657 67274c08SMasahiro Yamadaendif
1658 67274c08SMasahiro Yamada
1659 1da177e4SLinus Torvaldselse # KBUILD_EXTMOD
1660 1da177e4SLinus Torvalds
1661 1da177e4SLinus Torvalds###
1662 1da177e4SLinus Torvalds# External module support.
1663 1da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
1664 1da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
1665 1da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
1666 1da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
1667 1da177e4SLinus Torvalds# be used.
1668 1da177e4SLinus Torvalds#
1669 1da177e4SLinus Torvalds# The following are the only valid targets when building external
1670 1da177e4SLinus Torvalds# modules.
1671 1da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
1672 1da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
1673 1da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
1674 1da177e4SLinus Torvalds# make M=dir modules_install
1675 070b98bfSSam Ravnborg#                      Install the modules built in the module directory
1676 1da177e4SLinus Torvalds#                      Assumes install directory is already created
1677 1da177e4SLinus Torvalds
1678 1da177e4SLinus Torvalds# We are always building modules
1679 1da177e4SLinus TorvaldsKBUILD_MODULES := 1
1680 1da177e4SLinus Torvalds
1681 c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1682 c99f3918SMasahiro YamadaPHONY += modules
1683 48a0f727SMasahiro Yamadamodules: descend
1684 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1685 1da177e4SLinus Torvalds
1686 4f193362SPaul SmithPHONY += modules_install
1687 a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1688 a67dc21aSSam Ravnborg
1689 a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1690 4f193362SPaul SmithPHONY += _emodinst_
1691 a67dc21aSSam Ravnborg_emodinst_:
1692 a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1693 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1694 1da177e4SLinus Torvalds
1695 4f193362SPaul SmithPHONY += _emodinst_post
1696 a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1697 a67dc21aSSam Ravnborg	$(call cmd,depmod)
1698 a67dc21aSSam Ravnborg
1699 76cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
1700 bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
1701 1da177e4SLinus Torvalds
1702 fe69b420SMasahiro YamadaPHONY += help
1703 1da177e4SLinus Torvaldshelp:
1704 1da177e4SLinus Torvalds	@echo  '  Building external modules.'
1705 1da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1706 1da177e4SLinus Torvalds	@echo  ''
1707 1da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
1708 1da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
1709 1da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
1710 1da177e4SLinus Torvalds	@echo  ''
1711 06300b21SSam Ravnborg
1712 059bc9fcSMasahiro YamadaPHONY += prepare
1713 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
1714 1da177e4SLinus Torvalds
1715 b1fbfcb4SMasahiro Yamada# Single targets
1716 b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1717 b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1718 b1fbfcb4SMasahiro Yamada#
1719 b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1720 b1fbfcb4SMasahiro Yamada#
1721 b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1722 b1fbfcb4SMasahiro Yamada#
1723 b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1724 b1fbfcb4SMasahiro Yamada#
1725 b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1726 b1fbfcb4SMasahiro Yamada
1727 b1fbfcb4SMasahiro Yamadaifdef single-build
1728 b1fbfcb4SMasahiro Yamada
1729 b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1730 b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1731 b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1732 b1fbfcb4SMasahiro Yamada
1733 b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1734 b1fbfcb4SMasahiro Yamada	@:
1735 b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1736 b1fbfcb4SMasahiro Yamada	@:
1737 b1fbfcb4SMasahiro Yamada
1738 b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1739 b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1740 b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1741 b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1742 b1fbfcb4SMasahiro Yamadaendif
1743 b1fbfcb4SMasahiro Yamada
1744 b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1745 b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko)
1746 b1fbfcb4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1747 b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1748 b1fbfcb4SMasahiro Yamada
1749 b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1750 b1fbfcb4SMasahiro Yamada
1751 b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1752 b1fbfcb4SMasahiro Yamada
1753 b1fbfcb4SMasahiro Yamada# trim unrelated directories
1754 b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1755 b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1756 b1fbfcb4SMasahiro Yamada
1757 b1fbfcb4SMasahiro Yamadaendif
1758 b1fbfcb4SMasahiro Yamada
1759 b480fec9SMasahiro Yamadaifndef CONFIG_MODULES
1760 b480fec9SMasahiro YamadaKBUILD_MODULES :=
1761 b480fec9SMasahiro Yamadaendif
1762 b480fec9SMasahiro Yamada
1763 c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1764 c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1765 c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1766 c99f3918SMasahiro Yamada# make menuconfig etc.
1767 c99f3918SMasahiro Yamada# Error messages still appears in the original language
1768 c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1769 c99f3918SMasahiro Yamadadescend: $(build-dirs)
1770 c99f3918SMasahiro Yamada$(build-dirs): prepare
1771 b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
1772 f566e1fbSMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \
1773 b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1774 c99f3918SMasahiro Yamada
1775 76cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
1776 76cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
1777 76cd306dSMasahiro Yamada$(clean-dirs):
1778 76cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1779 76cd306dSMasahiro Yamada
1780 88d7be03SMichal Marekclean: $(clean-dirs)
1781 88d7be03SMichal Marek	$(call cmd,rmfiles)
1782 43f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1783 ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1784 4f0e3a57SRob Herring		-o -name '*.ko.*' \
1785 4f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1786 ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1787 bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
1788 88d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1789 9a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
1790 4fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
1791 88d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
1792 8b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
1793 6b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1794 433db3e2SVinícius Tinti		-o -name '*.ll' \
1795 88d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
1796 88d7be03SMichal Marek
1797 1da177e4SLinus Torvalds# Generate tags for editors
1798 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1799 a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1800 858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1801 1da177e4SLinus Torvalds
1802 f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
1803 1da177e4SLinus Torvalds	$(call cmd,tags)
1804 1da177e4SLinus Torvalds
1805 eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1806 eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1807 eb8305aeSMatthias Maennich
1808 eb8305aeSMatthias MaennichPHONY += nsdeps
1809 bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1810 eb8305aeSMatthias Maennichnsdeps: modules
1811 bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1812 eb8305aeSMatthias Maennich
1813 1da177e4SLinus Torvalds# Scripts to check various things for consistency
1814 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1815 1da177e4SLinus Torvalds
1816 279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1817 279f3dd3SPeter Foley
1818 1da177e4SLinus Torvaldsincludecheck:
1819 436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1820 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1821 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1822 1da177e4SLinus Torvalds
1823 1da177e4SLinus Torvaldsversioncheck:
1824 2ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1825 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1826 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1827 1da177e4SLinus Torvalds
1828 74425eeeSNicolas Palixcoccicheck:
1829 858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
1830 74425eeeSNicolas Palix
1831 1da177e4SLinus Torvaldsnamespacecheck:
1832 1da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
1833 1da177e4SLinus Torvalds
1834 295ac051SAdrian Bunkexport_report:
1835 295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1836 295ac051SAdrian Bunk
1837 c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1838 e3ccf6e3SJeff Dike
1839 011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1840 011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1841 011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1842 011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1843 011e3a9aSJeff Dikeifeq ($(ARCH), um)
1844 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1845 011e3a9aSJeff Dikeelse
1846 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1847 011e3a9aSJeff Dikeendif
1848 1da177e4SLinus Torvaldscheckstack:
1849 1da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1850 75dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1851 1da177e4SLinus Torvalds
1852 7b8ea53dSAmerigo Wangkernelrelease:
1853 7b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1854 01ab1788SAmerigo Wang
1855 cb58455cSSam Ravnborgkernelversion:
1856 2244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
1857 1da177e4SLinus Torvalds
1858 c398ff00SMike Marciniszynimage_name:
1859 c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1860 c398ff00SMike Marciniszyn
1861 ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1862 f47a23ceSMasahiro Yamada
1863 f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1864 f47a23ceSMasahiro Yamadatools_silent=s
1865 f47a23ceSMasahiro Yamadaendif
1866 f47a23ceSMasahiro Yamada
1867 ea01fa9fSBorislav Petkovtools/: FORCE
1868 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1869 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1870 ea01fa9fSBorislav Petkov
1871 ea01fa9fSBorislav Petkovtools/%: FORCE
1872 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1873 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1874 ea01fa9fSBorislav Petkov
1875 1da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1876 0663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
1877 1da177e4SLinus Torvalds
1878 bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
1879 50a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1880 569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1881 5a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
1882 50a8ec31SSam Ravnborg
1883 392885eeSMasahiro Yamada# read saved command lines for existing targets
1884 392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
1885 1da177e4SLinus Torvalds
1886 b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
1887 1da177e4SLinus Torvalds
1888 46b7c492SSZ Lin (林上智)endif # config-build
1889 2042b548SMasahiro Yamadaendif # mixed-build
1890 688931a5SMasahiro Yamadaendif # need-sub-make
1891 1da177e4SLinus Torvalds
1892 4f193362SPaul SmithPHONY += FORCE
1893 1da177e4SLinus TorvaldsFORCE:
1894 4f193362SPaul Smith
1895 bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1896 fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
1897 4f193362SPaul Smith.PHONY: $(PHONY)
1898