xref: /openbmc/linux/Makefile (revision 8f3d9f354286745c751374f5f1fcafee6b3f3136)
1 b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2 bfeffd15SLinus TorvaldsVERSION = 5
3 *8f3d9f35SLinus TorvaldsPATCHLEVEL = 7
4 55922c9dSLinus TorvaldsSUBLEVEL = 0
5 *8f3d9f35SLinus TorvaldsEXTRAVERSION = -rc1
6 d6d5df1dSLinus TorvaldsNAME = Kleptomaniac Octopus
7 1da177e4SLinus Torvalds
8 1da177e4SLinus Torvalds# *DOCUMENTATION*
9 1da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
10 1da177e4SLinus Torvalds# More info can be located in ./README
11 1da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
12 1da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
13 1da177e4SLinus Torvalds
14 ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
15 ba634eceSMasahiro YamadaPHONY := _all
16 ba634eceSMasahiro Yamada_all:
17 ba634eceSMasahiro Yamada
18 1da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
19 1da177e4SLinus Torvalds# to get the ordering right.
20 1da177e4SLinus Torvalds#
21 1da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
22 1da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
23 1da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
24 f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
25 1da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
26 1da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
27 1da177e4SLinus Torvalds# is now up to date.
28 1da177e4SLinus Torvalds#
29 1da177e4SLinus Torvalds# The only cases where we need to modify files which have global
30 1da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
31 1da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
32 1da177e4SLinus Torvalds# prepare rule.
33 1da177e4SLinus Torvalds
34 221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
35 3812b8c5SMasahiro Yamada
36 3812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
37 3812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
38 3812b8c5SMasahiro YamadaMAKEFLAGS += -rR
39 3812b8c5SMasahiro Yamada
40 3812b8c5SMasahiro Yamada# Avoid funny character set dependencies
41 3812b8c5SMasahiro Yamadaunexport LC_ALL
42 3812b8c5SMasahiro YamadaLC_COLLATE=C
43 3812b8c5SMasahiro YamadaLC_NUMERIC=C
44 3812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
45 3812b8c5SMasahiro Yamada
46 3812b8c5SMasahiro Yamada# Avoid interference with shell env settings
47 3812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
48 3812b8c5SMasahiro Yamada
49 066b7ed9SMichal Marek# Beautify output
50 066b7ed9SMichal Marek# ---------------------------------------------------------------------------
51 066b7ed9SMichal Marek#
52 066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
53 066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
54 066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
55 066b7ed9SMichal Marek#
56 066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
57 066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
58 066b7ed9SMichal Marek#
59 066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
60 066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
61 066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
62 066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
63 066b7ed9SMichal Marek#
64 066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
65 066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
66 066b7ed9SMichal Marek#
67 066b7ed9SMichal Marek#	$(Q)ln $@ :<
68 066b7ed9SMichal Marek#
69 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
70 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
71 505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
72 066b7ed9SMichal Marek#
73 1da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
74 1da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
75 1da177e4SLinus Torvalds
76 1da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
77 1da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
78 1da177e4SLinus Torvaldsendif
79 1da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
80 1da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
81 1da177e4SLinus Torvaldsendif
82 1da177e4SLinus Torvalds
83 066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
84 066b7ed9SMichal Marek  quiet =
85 066b7ed9SMichal Marek  Q =
86 066b7ed9SMichal Marekelse
87 066b7ed9SMichal Marek  quiet=quiet_
88 066b7ed9SMichal Marek  Q = @
89 066b7ed9SMichal Marekendif
90 066b7ed9SMichal Marek
91 066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
92 066b7ed9SMichal Marek# commands
93 066b7ed9SMichal Marek
94 6f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
95 066b7ed9SMichal Marek  quiet=silent_
96 066b7ed9SMichal Marekendif
97 066b7ed9SMichal Marek
98 066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
99 066b7ed9SMichal Marek
100 25b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
101 25b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
102 25b146c5SMasahiro Yamada#
103 25b146c5SMasahiro Yamada# For example, you can do this:
104 25b146c5SMasahiro Yamada#
105 25b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
106 25b146c5SMasahiro Yamada#
107 25b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
108 25b146c5SMasahiro Yamada# two syntaxes to specify it.
109 25b146c5SMasahiro Yamada#
110 1da177e4SLinus Torvalds# 1) O=
111 1da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
112 1da177e4SLinus Torvalds#
113 1da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
114 25b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
115 25b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
116 1da177e4SLinus Torvalds#
117 1da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
118 1da177e4SLinus Torvalds# variable.
119 1da177e4SLinus Torvalds
120 25b146c5SMasahiro Yamada# Do we want to change the working directory?
121 1da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
122 1da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
123 1da177e4SLinus Torvaldsendif
124 1da177e4SLinus Torvalds
125 25b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
126 25b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
127 25b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
128 25b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
129 25b146c5SMasahiro Yamada$(if $(abs_objtree),, \
130 25b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
131 25b146c5SMasahiro Yamada
132 25b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
133 25b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
134 25b146c5SMasahiro Yamadaelse
135 25b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
136 25b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
137 25b146c5SMasahiro Yamada
138 25b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
139 25b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
140 25b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
141 25b146c5SMasahiro Yamadaelse
142 25b146c5SMasahiro Yamadaneed-sub-make := 1
143 51193b76SRobert Jarzmikendif
144 51193b76SRobert Jarzmik
145 25b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
146 1da177e4SLinus Torvalds
147 25b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
148 25b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
149 25b146c5SMasahiro Yamadaendif
150 25b146c5SMasahiro Yamada
151 25b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
152 80463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
153 80463f1bSMasahiro Yamada#
154 80463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
155 25b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
156 25b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
157 688931a5SMasahiro Yamadaneed-sub-make := 1
158 25b146c5SMasahiro Yamadaendif
159 3812b8c5SMasahiro Yamada
160 688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
161 688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
162 688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
163 688931a5SMasahiro Yamadaneed-sub-make := 1
164 688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
165 688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ;
166 688931a5SMasahiro Yamadaendif
167 688931a5SMasahiro Yamada
168 25b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
169 221cc2d2SMasahiro Yamadaexport sub_make_done := 1
170 221cc2d2SMasahiro Yamada
171 688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
172 688931a5SMasahiro Yamada
173 0b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
174 0b35786dSMilton Miller
175 0209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
176 16f89098SCharles Keepax	@:
177 0b35786dSMilton Miller
178 c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
179 2e8d696bSMasahiro Yamadasub-make:
180 25b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
181 1da177e4SLinus Torvalds
182 688931a5SMasahiro Yamadaendif # need-sub-make
183 221cc2d2SMasahiro Yamadaendif # sub_make_done
184 688931a5SMasahiro Yamada
185 1da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
186 688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
187 1da177e4SLinus Torvalds
188 7ff52571SMasahiro Yamada# Do not print "Entering directory ...",
189 7ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
190 7ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
191 7ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
192 7ff52571SMasahiro Yamada
193 aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
194 aa55c8e2SMasahiro Yamada# C compilation.
195 aa55c8e2SMasahiro Yamada#
196 aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
197 aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
198 aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
199 aa55c8e2SMasahiro Yamada#
200 036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
201 036db11cSCao jin# including where to get the "sparse" utility.
202 aa55c8e2SMasahiro Yamada
203 aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
204 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
205 aa55c8e2SMasahiro Yamadaendif
206 aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
207 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
208 aa55c8e2SMasahiro Yamadaendif
209 aa55c8e2SMasahiro Yamada
210 7e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
211 7e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
212 aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
213 aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
214 aa55c8e2SMasahiro Yamadaendif
215 aa55c8e2SMasahiro Yamada
216 051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD
217 051f278eSMasahiro Yamada
218 394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
219 394053f4SMasahiro Yamada
220 25b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
221 9da0763bSMichal Marek        # building in the source tree
222 9da0763bSMichal Marek        srctree := .
223 051f278eSMasahiro Yamada	building_out_of_srctree :=
224 9da0763bSMichal Marekelse
225 25b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
226 9da0763bSMichal Marek                # building in a subdirectory of the source tree
227 9da0763bSMichal Marek                srctree := ..
228 9da0763bSMichal Marek        else
229 25b146c5SMasahiro Yamada                srctree := $(abs_srctree)
230 9da0763bSMichal Marek        endif
231 051f278eSMasahiro Yamada	building_out_of_srctree := 1
232 9da0763bSMichal Marekendif
233 2c1f4f12SMasahiro Yamada
234 95fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
235 95fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
236 95fd3f87SMasahiro Yamadaendif
237 2c1f4f12SMasahiro Yamada
238 7e1c0477SMichal Marekobjtree		:= .
239 6b12de69SMasahiro YamadaVPATH		:= $(srctree)
240 1da177e4SLinus Torvalds
241 051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
242 1da177e4SLinus Torvalds
243 2c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
244 2c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
245 2c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
246 2c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
247 2c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
248 2c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
249 2c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
250 2c1f4f12SMasahiro Yamada
251 2c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
252 2c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
253 2c1f4f12SMasahiro Yamada
254 22340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
255 22340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
256 2c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
257 59b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
258 4623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
259 4623980dSDavid Engraf			 outputmakefile
260 a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \
261 a29d4d8cSMasahiro Yamada			   kernelrelease
262 394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
263 2c1f4f12SMasahiro Yamada
264 2042b548SMasahiro Yamadaconfig-build	:=
265 2042b548SMasahiro Yamadamixed-build	:=
266 2042b548SMasahiro Yamadaneed-config	:= 1
267 d7942413SMasahiro Yamadamay-sync-config	:= 1
268 394053f4SMasahiro Yamadasingle-build	:=
269 2c1f4f12SMasahiro Yamada
270 2c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
271 2c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
272 2042b548SMasahiro Yamada		need-config :=
273 2c1f4f12SMasahiro Yamada	endif
274 2c1f4f12SMasahiro Yamadaendif
275 2c1f4f12SMasahiro Yamada
276 d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
277 d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
278 2042b548SMasahiro Yamada		may-sync-config :=
279 d7942413SMasahiro Yamada	endif
280 d7942413SMasahiro Yamadaendif
281 d7942413SMasahiro Yamada
282 d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
283 2042b548SMasahiro Yamada	may-sync-config :=
284 d7942413SMasahiro Yamadaendif
285 d7942413SMasahiro Yamada
286 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
287 2c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
288 2042b548SMasahiro Yamada		config-build := 1
289 2c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
290 2042b548SMasahiro Yamada			mixed-build := 1
291 2c1f4f12SMasahiro Yamada                endif
292 2c1f4f12SMasahiro Yamada        endif
293 2c1f4f12SMasahiro Yamadaendif
294 22340a06SMasahiro Yamada
295 394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
296 394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
297 394053f4SMasahiro Yamada	single-build := 1
298 394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
299 394053f4SMasahiro Yamada		mixed-build := 1
300 394053f4SMasahiro Yamada	endif
301 394053f4SMasahiro Yamadaendif
302 394053f4SMasahiro Yamada
303 22340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
304 22340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
305 22340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
306 2042b548SMasahiro Yamada		mixed-build := 1
307 22340a06SMasahiro Yamada        endif
308 22340a06SMasahiro Yamadaendif
309 22340a06SMasahiro Yamada
310 2c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
311 2c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
312 2c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
313 2042b548SMasahiro Yamada		mixed-build := 1
314 2c1f4f12SMasahiro Yamada        endif
315 2c1f4f12SMasahiro Yamadaendif
316 2c1f4f12SMasahiro Yamada
317 2042b548SMasahiro Yamadaifdef mixed-build
318 2c1f4f12SMasahiro Yamada# ===========================================================================
319 2c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
320 2c1f4f12SMasahiro Yamada# Handle them one by one.
321 2c1f4f12SMasahiro Yamada
322 2c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
323 2c1f4f12SMasahiro Yamada
324 2c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
325 2c1f4f12SMasahiro Yamada	@:
326 2c1f4f12SMasahiro Yamada
327 2c1f4f12SMasahiro Yamada__build_one_by_one:
328 2c1f4f12SMasahiro Yamada	$(Q)set -e; \
329 2c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
330 2c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
331 2c1f4f12SMasahiro Yamada	done
332 2c1f4f12SMasahiro Yamada
333 2042b548SMasahiro Yamadaelse # !mixed-build
334 2c1f4f12SMasahiro Yamada
335 2c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
336 2c1f4f12SMasahiro Yamada
337 2c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
338 2c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
339 2c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
340 2c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
341 2c1f4f12SMasahiro Yamada
342 b2d35fa5SAnders Roxellinclude scripts/subarch.include
343 1da177e4SLinus Torvalds
344 1da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
345 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
346 1da177e4SLinus Torvalds#
347 1da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
348 1da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
349 1da177e4SLinus Torvalds# ARCH can be set during invocation of make:
350 1da177e4SLinus Torvalds# make ARCH=ia64
351 1da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
352 1da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
353 1da177e4SLinus Torvalds
354 1da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
355 1da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
356 1da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
357 1da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
358 1da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
359 1da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
360 1da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
361 1da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
362 2331d1a6SSam RavnborgARCH		?= $(SUBARCH)
363 1da177e4SLinus Torvalds
364 1da177e4SLinus Torvalds# Architecture as present in compile.h
365 1da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
366 6752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
367 1da177e4SLinus Torvalds
368 d746d647SSam Ravnborg# Additional ARCH settings for x86
369 d746d647SSam Ravnborgifeq ($(ARCH),i386)
370 d746d647SSam Ravnborg        SRCARCH := x86
371 d746d647SSam Ravnborgendif
372 d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
373 d746d647SSam Ravnborg        SRCARCH := x86
374 d746d647SSam Ravnborgendif
375 74b469f2SSam Ravnborg
376 5e538790SSam Ravnborg# Additional ARCH settings for sparc
377 e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
378 e69f58c0SNamhyung Kim       SRCARCH := sparc
379 e69f58c0SNamhyung Kimendif
380 a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
381 5e538790SSam Ravnborg       SRCARCH := sparc
382 a439fe51SSam Ravnborgendif
383 2fb9b1bdSSam Ravnborg
384 3cc000b5SPaul Mundt# Additional ARCH settings for sh
385 3cc000b5SPaul Mundtifeq ($(ARCH),sh64)
386 3cc000b5SPaul Mundt       SRCARCH := sh
387 3cc000b5SPaul Mundtendif
388 3cc000b5SPaul Mundt
389 14cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
390 41263fc6SBen Gardinerexport KCONFIG_CONFIG
391 14cdd3c4SRoman Zippel
392 2a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
393 2a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig
394 2a86f661SMasahiro Yamada
395 1da177e4SLinus Torvalds# SHELL used by kbuild
396 858805b3SMasahiro YamadaCONFIG_SHELL := sh
397 1da177e4SLinus Torvalds
398 6d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
399 6d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
400 6d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
401 d7f14c66SUwe Kleine-König
402 a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
403 a0d1c951SMasahiro YamadaHOSTCC	= clang
404 a0d1c951SMasahiro YamadaHOSTCXX	= clang++
405 a0d1c951SMasahiro Yamadaelse
406 1da177e4SLinus TorvaldsHOSTCC	= gcc
407 1da177e4SLinus TorvaldsHOSTCXX	= g++
408 a0d1c951SMasahiro Yamadaendif
409 96f14fe7SLaura AbbottKBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
410 f92d19e0SLaura Abbott		-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
411 f92d19e0SLaura Abbott		$(HOSTCFLAGS)
412 735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
413 f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
414 f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
415 1da177e4SLinus Torvalds
416 1da177e4SLinus Torvalds# Make variables (CC, etc...)
417 1da177e4SLinus TorvaldsCPP		= $(CC) -E
418 a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
419 a0d1c951SMasahiro YamadaCC		= clang
420 a0d1c951SMasahiro YamadaLD		= ld.lld
421 a0d1c951SMasahiro YamadaAR		= llvm-ar
422 a0d1c951SMasahiro YamadaNM		= llvm-nm
423 a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
424 a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
425 a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
426 a0d1c951SMasahiro YamadaOBJSIZE		= llvm-size
427 a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
428 a0d1c951SMasahiro Yamadaelse
429 a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
430 a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
431 1da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
432 1da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
433 1da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
434 1da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
435 eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
436 a0d1c951SMasahiro YamadaOBJSIZE		= $(CROSS_COMPILE)size
437 a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
438 a0d1c951SMasahiro Yamadaendif
439 e83b9f55SAndrii NakryikoPAHOLE		= pahole
440 73a4f6dbSMasahiro YamadaLEX		= flex
441 73a4f6dbSMasahiro YamadaYACC		= bison
442 1da177e4SLinus TorvaldsAWK		= awk
443 caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
444 1da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
445 1da177e4SLinus TorvaldsPERL		= perl
446 011bf125SMasahiro YamadaPYTHON		= python
447 e9781b52SMasahiro YamadaPYTHON3		= python3
448 1da177e4SLinus TorvaldsCHECK		= sparse
449 858805b3SMasahiro YamadaBASH		= bash
450 1da177e4SLinus Torvalds
451 80a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
452 6c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
453 0c22be07SDouglas AndersonNOSTDINC_FLAGS :=
454 6588169dSSam RavnborgCFLAGS_MODULE   =
455 6588169dSSam RavnborgAFLAGS_MODULE   =
456 6588169dSSam RavnborgLDFLAGS_MODULE  =
457 1da177e4SLinus TorvaldsCFLAGS_KERNEL	=
458 1da177e4SLinus TorvaldsAFLAGS_KERNEL	=
459 b36fad65SMichal MarekLDFLAGS_vmlinux =
460 1da177e4SLinus Torvalds
461 abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
462 abbf1590SDavid HowellsUSERINCLUDE    := \
463 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
464 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
465 abbf1590SDavid Howells		-I$(srctree)/include/uapi \
466 3308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
467 abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
468 abbf1590SDavid Howells
469 1da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
470 1da177e4SLinus Torvalds# Needed to be compatible with the O= option
471 abbf1590SDavid HowellsLINUXINCLUDE    := \
472 9d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
473 9d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
474 051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
475 f8224f7fSMasahiro Yamada		-I$(objtree)/include \
476 f8224f7fSMasahiro Yamada		$(USERINCLUDE)
477 1da177e4SLinus Torvalds
478 42a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
479 eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
480 42a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
481 b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
482 51b97e35SKirill A. Shutemov		   -Wno-format-security \
483 433dc2ebSMasahiro Yamada		   -std=gnu89
484 433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
485 80c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
486 80c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
487 6588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
488 6588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
489 10df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
490 10df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
491 d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
492 433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
493 5241ab4cSMasahiro YamadaCLANG_FLAGS :=
494 1da177e4SLinus Torvalds
495 aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
496 eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
497 94f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
498 7bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
499 1da177e4SLinus Torvalds
500 d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
501 0e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
502 0e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
503 222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
504 6588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
505 80c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
506 1da177e4SLinus Torvalds
507 1da177e4SLinus Torvalds# Files to ignore in find ... statements
508 1da177e4SLinus Torvalds
509 ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
510 ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
511 ae63b2d7SPrarit Bhargava			  -prune -o
512 450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
513 450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
514 1da177e4SLinus Torvalds
515 1da177e4SLinus Torvalds# ===========================================================================
516 1da177e4SLinus Torvalds# Rules shared between *config targets and build targets
517 1da177e4SLinus Torvalds
518 312a3d09SCao jin# Basic helpers built in scripts/basic/
519 4f193362SPaul SmithPHONY += scripts_basic
520 1da177e4SLinus Torvaldsscripts_basic:
521 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
522 638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
523 1da177e4SLinus Torvalds
524 4f193362SPaul SmithPHONY += outputmakefile
525 e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
526 fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
527 fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
528 fd5f0cd6SJan Beulich# output directory.
529 3a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
530 3a51ff34SVladimir Kondratiev# ignore whole output directory
531 1da177e4SLinus Torvaldsoutputmakefile:
532 051f278eSMasahiro Yamadaifdef building_out_of_srctree
533 e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
534 e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
535 e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
536 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
537 e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
538 e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
539 e8e83a23SMasahiro Yamada		echo >&2 "***"; \
540 e8e83a23SMasahiro Yamada		false; \
541 e8e83a23SMasahiro Yamada	fi
542 92979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
543 4fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
544 156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
545 156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
546 fd5f0cd6SJan Beulichendif
547 1da177e4SLinus Torvalds
548 99516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
549 ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
550 5241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
551 ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
552 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)
553 ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
554 ae6b289aSChris Friesendif
555 ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
556 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
557 ae6b289aSChris Friesendif
558 7e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1)
559 238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
560 876a0600SNathan Chancellorendif
561 589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
562 238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
563 238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
564 3bd98050SJoel Stanleyexport CLANG_FLAGS
565 ae6b289aSChris Friesendif
566 ae6b289aSChris Fries
567 315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
568 315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
569 315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
570 315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
571 902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
572 315bab4eSMasahiro Yamada
573 2042b548SMasahiro Yamadaifdef config-build
574 1da177e4SLinus Torvalds# ===========================================================================
575 1da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
576 1da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
577 1da177e4SLinus Torvalds
578 1da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
579 1da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
580 1da177e4SLinus Torvalds# used for 'make defconfig'
581 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
582 315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
583 1da177e4SLinus Torvalds
584 36de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
585 31110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
586 31110ebbSSam Ravnborg
587 36de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
588 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
589 1da177e4SLinus Torvalds
590 2042b548SMasahiro Yamadaelse #!config-build
591 1da177e4SLinus Torvalds# ===========================================================================
592 1da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
593 1da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
594 1da177e4SLinus Torvalds
595 2c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
596 2c1f4f12SMasahiro Yamada# but instead _all depend on modules
597 2c1f4f12SMasahiro YamadaPHONY += all
598 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
599 2c1f4f12SMasahiro Yamada_all: all
600 2c1f4f12SMasahiro Yamadaelse
601 2c1f4f12SMasahiro Yamada_all: modules
602 2c1f4f12SMasahiro Yamadaendif
603 2c1f4f12SMasahiro Yamada
604 2c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
605 2c1f4f12SMasahiro Yamada# Normally, just do built-in.
606 2c1f4f12SMasahiro Yamada
607 2c1f4f12SMasahiro YamadaKBUILD_MODULES :=
608 2c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
609 2c1f4f12SMasahiro Yamada
610 2c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
611 2c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider
612 2c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to
613 2c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them.
614 2c1f4f12SMasahiro Yamada
615 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
616 2c1f4f12SMasahiro Yamada  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
617 2c1f4f12SMasahiro Yamadaendif
618 2c1f4f12SMasahiro Yamada
619 2c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
620 2c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
621 2c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
622 2c1f4f12SMasahiro Yamada
623 d85103acSMasahiro Yamadaifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
624 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
625 2c1f4f12SMasahiro Yamadaendif
626 2c1f4f12SMasahiro Yamada
627 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
628 2c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
629 2c1f4f12SMasahiro Yamadaendif
630 2c1f4f12SMasahiro Yamada
631 2c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
632 2c1f4f12SMasahiro Yamada
633 2042b548SMasahiro Yamadaifdef need-config
634 d93a18f2SMasahiro Yamadainclude include/config/auto.conf
635 d93a18f2SMasahiro Yamadaendif
636 d93a18f2SMasahiro Yamada
637 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
638 1da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
639 1da177e4SLinus Torvaldsinit-y		:= init/
640 f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
641 d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
642 1da177e4SLinus Torvaldsnet-y		:= net/
643 1da177e4SLinus Torvaldslibs-y		:= lib/
644 1da177e4SLinus Torvaldscore-y		:= usr/
645 37d9fe47SFeng Wuvirt-y		:= virt/
646 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
647 1da177e4SLinus Torvalds
648 315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
649 315bab4eSMasahiro Yamada# command line.
650 315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
651 315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
652 315bab4eSMasahiro Yamadaall: vmlinux
653 315bab4eSMasahiro Yamada
654 315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
655 315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
656 315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
657 5aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
658 315bab4eSMasahiro Yamada
659 b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
660 b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
661 b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
662 b1f4ff74SPaulo Zanoniendif
663 b1f4ff74SPaulo Zanoni
664 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
665 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
666 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
667 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
668 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
669 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
670 669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
671 669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
672 669e06b1SMasahiro Yamada
673 315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
674 315bab4eSMasahiro Yamada
675 2042b548SMasahiro Yamadaifdef need-config
676 2042b548SMasahiro Yamadaifdef may-sync-config
677 315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
678 315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
679 315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
680 d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
681 1da177e4SLinus Torvalds
682 05850719SMasahiro Yamada$(KCONFIG_CONFIG):
683 05850719SMasahiro Yamada	@echo >&2 '***'
684 05850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
685 05850719SMasahiro Yamada	@echo >&2 '***'
686 05850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
687 05850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
688 05850719SMasahiro Yamada	@echo >&2 '***'
689 05850719SMasahiro Yamada	@/bin/false
690 1da177e4SLinus Torvalds
691 61277981SUlf Magnusson# The actual configuration files used during the build are stored in
692 61277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
693 61277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
694 9390dff6SMasahiro Yamada#
695 9390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
696 9390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
697 f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
698 8b41fc44SMasahiro Yamada%/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG)
699 911a91c3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
700 2042b548SMasahiro Yamadaelse # !may-sync-config
701 d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
702 d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
703 d7942413SMasahiro Yamada# Use auto.conf to trigger the test
704 9ee4e336SSam RavnborgPHONY += include/config/auto.conf
705 9ee4e336SSam Ravnborg
706 9ee4e336SSam Ravnborginclude/config/auto.conf:
707 264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
708 5369f550SMichal Marek	echo >&2;							\
709 5369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
710 5369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
711 5369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
712 5369f550SMichal Marek	echo >&2 ;							\
713 9ee4e336SSam Ravnborg	/bin/false)
714 9ee4e336SSam Ravnborg
715 d7942413SMasahiro Yamadaendif # may-sync-config
716 2042b548SMasahiro Yamadaendif # need-config
717 1da177e4SLinus Torvalds
718 a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
719 ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
720 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
721 bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
722 6f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
723 a1c48bb1SGeert Uytterhoeven
724 15f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
725 a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
726 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
727 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
728 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
729 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
730 1da177e4SLinus Torvaldsendif
731 1da177e4SLinus Torvalds
732 b303c6dfSMasahiro Yamadaifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
733 b303c6dfSMasahiro YamadaKBUILD_CFLAGS   += -Wno-maybe-uninitialized
734 b303c6dfSMasahiro Yamadaendif
735 a76bcf55SArnd Bergmann
736 69102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
737 69102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
738 b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
739 69102311SJiri Kosina
740 d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov
741 6b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
742 6b90bd4bSEmese Revfy
743 1873e870SAndi Kleenifdef CONFIG_READABLE_ASM
744 1873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
745 1873e870SAndi Kleen# reorder blocks reorders the control in the function
746 1873e870SAndi Kleen# ipa clone creates specialized cloned functions
747 1873e870SAndi Kleen# partial inlining inlines only parts of functions
748 1873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
749 1873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
750 1873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
751 1873e870SAndi Kleenendif
752 1873e870SAndi Kleen
753 08f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
754 a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
755 35bb5b1eSAndi Kleenendif
756 35bb5b1eSAndi Kleen
757 2a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
758 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
759 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
760 2a61f474SMasahiro Yamada
761 2a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
762 e06b8b98SSam Ravnborg
763 076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
764 a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
765 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
766 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
767 cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
768 cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
769 cfe17c9bSMasahiro Yamada# See modpost pattern 2
770 a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
771 cfe17c9bSMasahiro Yamadaelse
772 cfe17c9bSMasahiro Yamada
773 cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
774 cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
775 9df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
776 e2079e93SNathan Chancellor
777 e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
778 e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
779 e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
780 e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
781 cfe17c9bSMasahiro Yamadaendif
782 cfe17c9bSMasahiro Yamada
783 0a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
784 1da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
785 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
786 1da177e4SLinus Torvaldselse
787 7e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
788 7e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
789 7e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
790 7e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
791 7e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
792 7e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
793 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
794 1da177e4SLinus Torvaldsendif
795 7e9501fdSRabin Vincentendif
796 1da177e4SLinus Torvalds
797 709a972eSKees Cook# Initialize all stack variables with a pattern, if desired.
798 709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL
799 709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
800 709a972eSKees Cookendif
801 709a972eSKees Cook
802 1e88e415SMasahiro YamadaDEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
803 2062afb4SLinus Torvalds
804 1da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
805 866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
806 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
807 866ced95SAndi Kleenelse
808 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
809 866ced95SAndi Kleenendif
810 2288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
811 1da177e4SLinus Torvaldsendif
812 bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
813 9d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
814 bfaf2dd3SAndi Kleenendif
815 1da177e4SLinus Torvalds
816 d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
817 1e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
818 e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
819 d6f4ceb7SAndi Kleenendif
820 d6f4ceb7SAndi Kleen
821 1e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
822 1e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
823 1e88e415SMasahiro Yamada
824 606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
825 07d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
826 07d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
827 07d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
828 07d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
829 07d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
830 a2546faeSSteven Rostedt  endif
831 2f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
832 2f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
833 2f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
834 2f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
835 2f4df001SVasily Gorbik    endif
836 2f4df001SVasily Gorbik  endif
837 07d04081SVasily Gorbikendif
838 a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
839 f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
840 f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
841 f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
842 a2546faeSSteven Rostedt  endif
843 f28bc3c3SVasily Gorbikendif
844 f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
845 f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
846 f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
847 72441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
848 cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
849 72441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
850 72441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
851 72441cb1SSteven Rostedt	endif
852 72441cb1SSteven Rostedtendif
853 16444a8aSArnaldo Carvalho de Meloendif
854 16444a8aSArnaldo Carvalho de Melo
855 91341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
856 91341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
857 91341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
858 91341d4bSSam Ravnborgendif
859 91341d4bSSam Ravnborg
860 90ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
861 e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
862 e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
863 90ad4052SMasahiro Yamadaendif
864 90ad4052SMasahiro Yamada
865 43bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH
866 43bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
867 43bd3a95SMiroslav Benesendif
868 43bd3a95SMiroslav Benes
869 e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
870 e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
871 e8e69931SSam Ravnborg
872 1da177e4SLinus Torvalds# warn about C99 declaration after statement
873 a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
874 1da177e4SLinus Torvalds
875 0bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
876 8289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
877 0bb95f80SKees Cook
878 070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
879 fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
880 1da177e4SLinus Torvalds
881 217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
882 217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
883 217c3e01SStephen Rothwell
884 fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
885 a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
886 d0115552SLinus Torvalds
887 87e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this
888 87e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we
889 87e0d4f0SDaniel Borkmann# need to disable it here generally.
890 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fno-merge-all-constants)
891 87e0d4f0SDaniel Borkmann
892 87e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine
893 87e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled.
894 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fmerge-constants)
895 87e0d4f0SDaniel Borkmann
896 3ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
897 3ce120b1SLinus TorvaldsKBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
898 3ce120b1SLinus Torvalds
899 8f7f5c9fSAndi Kleen# conserve stack if available
900 8f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
901 8f7f5c9fSAndi Kleen
902 fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
903 fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
904 fe7c36c7SJosh Triplett
905 ea8daa7bSDaniel Wagner# enforce correct pointer usage
906 ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
907 ea8daa7bSDaniel Wagner
908 c834f0e8SKees Cook# Require designated initializers for all marked structures
909 c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
910 c834f0e8SKees Cook
911 a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
912 a73619a8SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
913 a73619a8SMasahiro Yamada
914 29be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is
915 29be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern
916 29be86d7SSeth Forsheeifdef CONFIG_RETPOLINE
917 29be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
918 29be86d7SSeth Forsheeendif
919 29be86d7SSeth Forshee
920 a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
921 a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
922 c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
923 a86fe353SMasahiro Yamada
924 8cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
925 8cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
926 8cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
927 8cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
928 52bcc330SSam Ravnborg
929 89ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id
930 89ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id
931 18991197SRoland McGrath
932 5d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
933 d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
934 5d7d18f5SDavid Howellsendif
935 5d7d18f5SDavid Howells
936 5cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
937 5cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
938 5cf896fbSPeter Collingbourneendif
939 5cf896fbSPeter Collingbourne
940 80591e61SLuc Van Oostenryck# make the checker run with the right architecture
941 80591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
942 80591e61SLuc Van Oostenryck
943 14516765SLuc Van Oostenryck# insure the checker run with the right endianness
944 14516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
945 14516765SLuc Van Oostenryck
946 1f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
947 1f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
948 1f2f01b1SLuc Van Oostenryck
949 1da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
950 1da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
951 1da177e4SLinus Torvalds# set in the environment
952 1da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
953 1da177e4SLinus Torvalds# this default value
954 1da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
955 1da177e4SLinus Torvalds
956 1da177e4SLinus Torvalds#
957 1da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
958 1da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
959 1da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
960 1da177e4SLinus Torvalds
961 1da177e4SLinus Torvalds#
962 f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
963 f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
964 f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
965 f4d4ffc0SJason Cooper#
966 f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
967 f4d4ffc0SJason Cooper
968 f4d4ffc0SJason Cooper#
969 1da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
970 1da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
971 070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
972 1da177e4SLinus Torvalds#
973 1da177e4SLinus Torvalds
974 df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
975 1da177e4SLinus Torvaldsexport MODLIB
976 1da177e4SLinus Torvalds
977 ac031f26STheodore Ts'o#
978 2ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
979 2ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
980 2ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
981 177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
982 2ea03891SSam Ravnborg
983 ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
984 ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
985 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
986 ac031f26STheodore Ts'oelse
987 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
988 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
989 ac031f26STheodore Ts'oelse
990 2ea03891SSam Ravnborgmod_strip_cmd = true
991 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
992 ac031f26STheodore Ts'oexport mod_strip_cmd
993 ac031f26STheodore Ts'o
994 beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
995 beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
996 beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
997 beb50df3SBertrand Jacquin
998 beb50df3SBertrand Jacquinmod_compress_cmd = true
999 beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
1000 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
1001 3d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
1002 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
1003 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
1004 3d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
1005 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
1006 beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
1007 beb50df3SBertrand Jacquinexport mod_compress_cmd
1008 beb50df3SBertrand Jacquin
1009 d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
1010 3ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
1011 3ee550f1SDavid Woodhouse
1012 3ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1013 e2a666d5SRusty Russellelse
1014 e2a666d5SRusty Russellmod_sign_cmd = true
1015 e2a666d5SRusty Russellendif
1016 e2a666d5SRusty Russellexport mod_sign_cmd
1017 e2a666d5SRusty Russell
1018 056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1019 056d28d1SRolf Eike Beer
1020 9f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
1021 9f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
1022 056d28d1SRolf Eike Beer		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1023 9f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
1024 9f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
1025 9f0c18aeSJosh Poimboeuf  else
1026 9f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
1027 9f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
1028 9f0c18aeSJosh Poimboeuf  endif
1029 9f0c18aeSJosh Poimboeufendif
1030 9f0c18aeSJosh Poimboeuf
1031 e00d8880SMasahiro YamadaPHONY += prepare0
1032 e2a666d5SRusty Russell
1033 394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
1034 bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
1035 47801c97SMasahiro Yamada
1036 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1037 cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1038 1da177e4SLinus Torvalds
1039 1da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
1040 1da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
1041 37d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
1042 1da177e4SLinus Torvalds
1043 1eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
1044 1eaca4b9SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
1045 1eaca4b9SMasahiro Yamada			$(drivers-) $(net-) $(libs-) $(virt-))))
1046 1da177e4SLinus Torvalds
1047 c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
1048 76cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1049 c99f3918SMasahiro Yamada
1050 f49821eeSNicholas Piggininit-y		:= $(patsubst %/, %/built-in.a, $(init-y))
1051 f49821eeSNicholas Piggincore-y		:= $(patsubst %/, %/built-in.a, $(core-y))
1052 f49821eeSNicholas Piggindrivers-y	:= $(patsubst %/, %/built-in.a, $(drivers-y))
1053 f49821eeSNicholas Pigginnet-y		:= $(patsubst %/, %/built-in.a, $(net-y))
1054 7273ad2bSMasahiro Yamadalibs-y2		:= $(patsubst %/, %/built-in.a, $(filter %/, $(libs-y)))
1055 7273ad2bSMasahiro Yamadaifdef CONFIG_MODULES
1056 7273ad2bSMasahiro Yamadalibs-y1		:= $(filter-out %/, $(libs-y))
1057 7273ad2bSMasahiro Yamadalibs-y2		+= $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1058 7273ad2bSMasahiro Yamadaelse
1059 1da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
1060 7273ad2bSMasahiro Yamadaendif
1061 f49821eeSNicholas Pigginvirt-y		:= $(patsubst %/, %/built-in.a, $(virt-y))
1062 1da177e4SLinus Torvalds
1063 1f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1064 d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
1065 d151e971SMasahiro Yamada			      $(drivers-y) $(net-y) $(virt-y)
1066 3a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1)
1067 95698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
1068 1f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
1069 85f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1070 233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
1071 1da177e4SLinus Torvalds
1072 d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1073 1da177e4SLinus Torvalds
1074 3fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
1075 3fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
1076 2441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
1077 c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order
1078 ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1079 86556392SNicolas Pitre	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
1080 2441e78bSNicolas Pitreendif
1081 23121ca2SNicolas Pitre
1082 1f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
1083 1f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
1084 1f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
1085 1f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS
1086 1f50b80aSMasahiro Yamada  KBUILD_MODULES := 1
1087 1f50b80aSMasahiro Yamadaendif
1088 1f50b80aSMasahiro Yamada
1089 07a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1090 07a422bbSMasahiro Yamada
1091 88694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
1092 88694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
1093 88694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
1094 88694cffSQuentin Perret
1095 07a422bbSMasahiro Yamada$(autoksyms_h):
1096 88694cffSQuentin Perret	$(call cmd,autoksyms_h)
1097 23121ca2SNicolas Pitre
1098 fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1099 fbe6e37dSNicholas Piggin
1100 fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1101 fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
1102 d503ac53SMasahiro Yamada	$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
1103 fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1104 2441e78bSNicolas Pitre
1105 3fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1106 1f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1107 741f98feSSam Ravnborg
1108 392885eeSMasahiro Yamadatargets := vmlinux
1109 392885eeSMasahiro Yamada
1110 1da177e4SLinus Torvalds# The actual objects are generated when descending,
1111 1da177e4SLinus Torvalds# make sure no implicit rule kicks in
1112 c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ;
1113 1da177e4SLinus Torvalds
1114 ba97df45SMasahiro Yamadafilechk_kernel.release = \
1115 0d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1116 0d0e7718SMichal Marek
1117 83a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
1118 24512795SMasahiro Yamadainclude/config/kernel.release: FORCE
1119 0d0e7718SMichal Marek	$(call filechk,kernel.release)
1120 cb58455cSSam Ravnborg
1121 d8821622SMasahiro Yamada# Additional helpers built in scripts/
1122 d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1123 d8821622SMasahiro Yamada# in parallel
1124 d8821622SMasahiro YamadaPHONY += scripts
1125 60df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1126 d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1127 cb58455cSSam Ravnborg
1128 1da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
1129 5bb78269SSam Ravnborg# or the modules are listed in "prepare".
1130 5bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
1131 5bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
1132 5bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
1133 1da177e4SLinus Torvalds
1134 a5139fb3SMasahiro YamadaPHONY += prepare archprepare
1135 5bb78269SSam Ravnborg
1136 36de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1137 30527cefSMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
1138 5bb78269SSam Ravnborg
1139 65bba042SMasahiro Yamadaprepare0: archprepare
1140 60df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
1141 8d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
1142 86feeaa8SSam Ravnborg
1143 1da177e4SLinus Torvalds# All the preparing..
1144 b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1145 b9ab5ebbSJosh Poimboeuf
1146 2c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
1147 7d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1148 7d0e5c20SMasahiro Yamada
1149 2c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
1150 2c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1151 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1152 037fc336SMasahiro Yamada	generic=include/asm-generic
1153 2c1f4f12SMasahiro Yamadauapi-asm-generic:
1154 037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1155 037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
1156 2c1f4f12SMasahiro Yamada
1157 b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
1158 3b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1159 ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1160 ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1161 ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1162 ef7cfd00SMasahiro Yamada	@false
1163 ef7cfd00SMasahiro Yamadaelse
1164 ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1165 ef7cfd00SMasahiro Yamadaendif
1166 ef7cfd00SMasahiro Yamadaendif
1167 1da177e4SLinus Torvalds
1168 1da177e4SLinus Torvalds# Generate some files
1169 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1170 1da177e4SLinus Torvalds
1171 1da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
1172 1da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
1173 1da177e4SLinus Torvalds
1174 1da177e4SLinus Torvaldsuts_len := 64
1175 63104eecSSam Ravnborgdefine filechk_utsrelease.h
1176 1da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1177 1da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1178 1da177e4SLinus Torvalds	  exit 1;                                                         \
1179 1da177e4SLinus Torvalds	fi;                                                               \
1180 ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1181 1da177e4SLinus Torvaldsendef
1182 1da177e4SLinus Torvalds
1183 63104eecSSam Ravnborgdefine filechk_version.h
1184 ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
1185 78d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1186 ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1187 63104eecSSam Ravnborgendef
1188 63104eecSSam Ravnborg
1189 43fee2b2SMasahiro Yamada$(version_h): FORCE
1190 1da177e4SLinus Torvalds	$(call filechk,version.h)
1191 223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
1192 1da177e4SLinus Torvalds
1193 273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
1194 63104eecSSam Ravnborg	$(call filechk,utsrelease.h)
1195 63104eecSSam Ravnborg
1196 179efcb4SVegard NossumPHONY += headerdep
1197 179efcb4SVegard Nossumheaderdep:
1198 9663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1199 9663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1200 179efcb4SVegard Nossum
1201 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1202 8d730cfbSDavid Woodhouse# Kernel headers
1203 8d730cfbSDavid Woodhouse
1204 e6883b18SSam Ravnborg#Default location for installed headers
1205 e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1206 e6883b18SSam Ravnborg
1207 59b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1208 59b2bd05SMasahiro Yamada      cmd_headers_install = \
1209 59b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
1210 59b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1211 59b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
1212 6d716275SDavid Woodhouse
1213 8d730cfbSDavid WoodhousePHONY += headers_install
1214 59b2bd05SMasahiro Yamadaheaders_install: headers
1215 59b2bd05SMasahiro Yamada	$(call cmd,headers_install)
1216 4f193362SPaul Smith
1217 1da177e4SLinus TorvaldsPHONY += archheaders archscripts
1218 1da177e4SLinus Torvalds
1219 a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1220 1da177e4SLinus Torvalds
1221 59b2bd05SMasahiro YamadaPHONY += headers
1222 59b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1223 9d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1224 2fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1225 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1226 d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1227 1f85712eSMike Frysinger
1228 7ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
1229 68475359SDavid WoodhousePHONY += headers_check
1230 7ecaf069SMasahiro Yamadaheaders_check:
1231 7ecaf069SMasahiro Yamada	@:
1232 68475359SDavid Woodhouse
1233 e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
1234 59b2bd05SMasahiro Yamadaprepare: headers
1235 e949f4c2SMasahiro Yamadaendif
1236 1da177e4SLinus Torvalds
1237 bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1238 bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1239 bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1240 bdd7714bSMasahiro Yamada
1241 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1242 5a5da78bSShuah Khan# Kernel selftest
1243 5a5da78bSShuah Khan
1244 5a5da78bSShuah KhanPHONY += kselftest
1245 5a5da78bSShuah Khankselftest:
1246 2bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1247 5a5da78bSShuah Khan
1248 17eac6c2SShuah Khankselftest-%: FORCE
1249 17eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1250 dcb825a9SWang Long
1251 3d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
1252 3d6dee7aSBamvor Jian Zhangkselftest-merge:
1253 3d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1254 6d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
1255 6d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1256 3e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1257 3d6dee7aSBamvor Jian Zhang
1258 5a5da78bSShuah Khan# ---------------------------------------------------------------------------
1259 37c8a5faSRob Herring# Devicetree files
1260 37c8a5faSRob Herring
1261 37c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1262 37c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
1263 37c8a5faSRob Herringendif
1264 37c8a5faSRob Herring
1265 37c8a5faSRob Herringifneq ($(dtstree),)
1266 37c8a5faSRob Herring
1267 a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
1268 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1269 37c8a5faSRob Herring
1270 c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1271 b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
1272 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
1273 37c8a5faSRob Herring
1274 b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1275 e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1276 b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1277 b5154bf6SMasahiro Yamadaendif
1278 b5154bf6SMasahiro Yamada
1279 b5154bf6SMasahiro Yamadadtbs_check: dtbs
1280 4f0e3a57SRob Herring
1281 37c8a5faSRob Herringdtbs_install:
1282 2431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1283 37c8a5faSRob Herring
1284 37c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
1285 37c8a5faSRob Herringall: dtbs
1286 37c8a5faSRob Herringendif
1287 37c8a5faSRob Herring
1288 37c8a5faSRob Herringendif
1289 37c8a5faSRob Herring
1290 37c8a5faSRob HerringPHONY += scripts_dtc
1291 37c8a5faSRob Herringscripts_dtc: scripts_basic
1292 37c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
1293 37c8a5faSRob Herring
1294 e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1295 e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1296 e10c4321SMasahiro Yamadaendif
1297 e10c4321SMasahiro Yamada
1298 c473a8d0SMasahiro YamadaPHONY += dt_binding_check
1299 4f0e3a57SRob Herringdt_binding_check: scripts_dtc
1300 4f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1301 4f0e3a57SRob Herring
1302 37c8a5faSRob Herring# ---------------------------------------------------------------------------
1303 1da177e4SLinus Torvalds# Modules
1304 1da177e4SLinus Torvalds
1305 1da177e4SLinus Torvaldsifdef CONFIG_MODULES
1306 1da177e4SLinus Torvalds
1307 1da177e4SLinus Torvalds# By default, build modules as well
1308 1da177e4SLinus Torvalds
1309 73d1393eSMichal Marekall: modules
1310 1da177e4SLinus Torvalds
1311 1da177e4SLinus Torvalds# Build modules
1312 551559e1STejun Heo#
1313 551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1314 551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1315 551559e1STejun Heo# using awk while concatenating to the final file.
1316 1da177e4SLinus Torvalds
1317 4f193362SPaul SmithPHONY += modules
1318 8b41fc44SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order
1319 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1320 3a48a919SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
1321 1da177e4SLinus Torvalds
1322 c99f3918SMasahiro Yamadamodules.order: descend
1323 c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1324 a6c36632SMichal Marek
1325 1da177e4SLinus Torvalds# Target to prepare building external modules
1326 4f193362SPaul SmithPHONY += modules_prepare
1327 059bc9fcSMasahiro Yamadamodules_prepare: prepare
1328 1da177e4SLinus Torvalds
1329 1da177e4SLinus Torvalds# Target to install modules
1330 4f193362SPaul SmithPHONY += modules_install
1331 1da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
1332 1da177e4SLinus Torvalds
1333 4f193362SPaul SmithPHONY += _modinst_
1334 2da30e70SMichal Marek_modinst_:
1335 1da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
1336 1da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
1337 1da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
1338 8e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
1339 1da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1340 1da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
1341 7e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
1342 1da177e4SLinus Torvalds	fi
1343 1bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
1344 8b41fc44SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
1345 898490c0SAlexey Gladkov	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1346 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1347 1da177e4SLinus Torvalds
1348 50a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
1349 1da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
1350 1da177e4SLinus Torvalds# boot script depmod is the master version.
1351 4f193362SPaul SmithPHONY += _modinst_post
1352 6d128e1eSLinus Torvalds_modinst_post: _modinst_
1353 50a8ec31SSam Ravnborg	$(call cmd,depmod)
1354 1da177e4SLinus Torvalds
1355 d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1356 d890f510SJosh BoyerPHONY += modules_sign
1357 d890f510SJosh Boyermodules_sign:
1358 d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1359 d890f510SJosh Boyerendif
1360 d890f510SJosh Boyer
1361 1da177e4SLinus Torvaldselse # CONFIG_MODULES
1362 1da177e4SLinus Torvalds
1363 1da177e4SLinus Torvalds# Modules not configured
1364 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1365 1da177e4SLinus Torvalds
1366 612e47ceSMasahiro YamadaPHONY += modules modules_install
1367 612e47ceSMasahiro Yamadamodules modules_install:
1368 5369f550SMichal Marek	@echo >&2
1369 5369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
1370 5369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
1371 5369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
1372 5369f550SMichal Marek	@echo >&2
1373 1da177e4SLinus Torvalds	@exit 1
1374 1da177e4SLinus Torvalds
1375 1da177e4SLinus Torvaldsendif # CONFIG_MODULES
1376 1da177e4SLinus Torvalds
1377 1da177e4SLinus Torvalds###
1378 1da177e4SLinus Torvalds# Cleaning is done on three levels.
1379 1da177e4SLinus Torvalds# make clean     Delete most generated files
1380 1da177e4SLinus Torvalds#                Leave enough to build external modules
1381 1da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
1382 1da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
1383 1da177e4SLinus Torvalds
1384 1da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1385 b7dca6ddSMasahiro YamadaCLEAN_DIRS  += include/ksym
1386 8b41fc44SMasahiro YamadaCLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps
1387 1da177e4SLinus Torvalds
1388 1da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1389 d6fc9fcbSMasahiro YamadaMRPROPER_DIRS  += include/config include/generated          \
1390 46a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
1391 46a63d4bSMasahiro Yamada		  debian/ snap/ tar-install/
1392 278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \
1393 46457133SMasahiro Yamada		  Module.symvers \
1394 fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1395 fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
1396 46a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
1397 46a63d4bSMasahiro Yamada		  *.spec
1398 1da177e4SLinus Torvalds
1399 46457133SMasahiro Yamada# Directories & files removed with 'make distclean'
1400 46457133SMasahiro YamadaDISTCLEAN_DIRS  +=
1401 46457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1402 46457133SMasahiro Yamada
1403 1da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
1404 1da177e4SLinus Torvalds#
1405 1da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
1406 1da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1407 1da177e4SLinus Torvalds
1408 76cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
1409 1da177e4SLinus Torvalds
1410 bd1ee804SPawel Mollvmlinuxclean:
1411 bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1412 fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1413 bd1ee804SPawel Moll
1414 bd1ee804SPawel Mollclean: archclean vmlinuxclean
1415 1da177e4SLinus Torvalds
1416 1da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
1417 1da177e4SLinus Torvalds#
1418 1da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1419 1da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1420 cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
1421 1da177e4SLinus Torvalds
1422 b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
1423 1da177e4SLinus Torvalds$(mrproper-dirs):
1424 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1425 1da177e4SLinus Torvalds
1426 b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
1427 1da177e4SLinus Torvalds	$(call cmd,rmdirs)
1428 1da177e4SLinus Torvalds	$(call cmd,rmfiles)
1429 1da177e4SLinus Torvalds
1430 1da177e4SLinus Torvalds# distclean
1431 1da177e4SLinus Torvalds#
1432 46457133SMasahiro Yamadadistclean: rm-dirs  := $(wildcard $(DISTCLEAN_DIRS))
1433 46457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
1434 46457133SMasahiro Yamada
1435 4f193362SPaul SmithPHONY += distclean
1436 1da177e4SLinus Torvalds
1437 1da177e4SLinus Torvaldsdistclean: mrproper
1438 46457133SMasahiro Yamada	$(call cmd,rmdirs)
1439 46457133SMasahiro Yamada	$(call cmd,rmfiles)
1440 1da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
1441 1da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1442 f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1443 f78271dfSMasahiro Yamada		-o -name 'core' \) \
1444 1da177e4SLinus Torvalds		-type f -print | xargs rm -f
1445 1da177e4SLinus Torvalds
1446 1da177e4SLinus Torvalds
1447 1da177e4SLinus Torvalds# Packaging of the kernel to various formats
1448 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1449 1da177e4SLinus Torvalds
1450 bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1451 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1452 031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1453 000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1454 1da177e4SLinus Torvalds
1455 1da177e4SLinus Torvalds# Brief documentation of the typical targets used
1456 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1457 1da177e4SLinus Torvalds
1458 5dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1459 a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
1460 5dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1461 5dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
1462 1da177e4SLinus Torvalds
1463 fe69b420SMasahiro YamadaPHONY += help
1464 1da177e4SLinus Torvaldshelp:
1465 1da177e4SLinus Torvalds	@echo  'Cleaning targets:'
1466 5ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
1467 5cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
1468 5ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1469 5cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
1470 1da177e4SLinus Torvalds	@echo  ''
1471 1da177e4SLinus Torvalds	@echo  'Configuration targets:'
1472 1da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1473 1da177e4SLinus Torvalds	@echo  ''
1474 1da177e4SLinus Torvalds	@echo  'Other generic targets:'
1475 1da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
1476 1da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
1477 1da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
1478 9cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1479 1da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
1480 40ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1481 433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1482 433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
1483 62718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1484 62718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1485 155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1486 c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
1487 1da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
1488 1da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1489 f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
1490 3f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
1491 3f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
1492 3f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
1493 2fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1494 59df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1495 2fb9b1bdSSam Ravnborg	 echo  ''
1496 31b8cc80SRandy Dunlap	@echo  'Static analysers:'
1497 1da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1498 1da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1499 aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1500 ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1501 295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1502 74425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
1503 7f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
1504 74425eeeSNicolas Palix	@echo  ''
1505 eb8305aeSMatthias Maennich	@echo  'Tools:'
1506 eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1507 eb8305aeSMatthias Maennich	@echo  ''
1508 31b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1509 e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
1510 5a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
1511 5a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1512 e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1513 e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1514 e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1515 dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1516 e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1517 e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
1518 5a5da78bSShuah Khan	@echo  ''
1519 37c8a5faSRob Herring	@$(if $(dtstree), \
1520 37c8a5faSRob Herring		echo 'Devicetree:'; \
1521 37c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
1522 37c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1523 7aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
1524 7aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
1525 37c8a5faSRob Herring		echo '')
1526 37c8a5faSRob Herring
1527 31b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
1528 31b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
1529 31b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
1530 31b8cc80SRandy Dunlap	@echo  ''
1531 1da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1532 000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
1533 1da177e4SLinus Torvalds	@echo  ''
1534 1da177e4SLinus Torvalds	@echo  'Documentation targets:'
1535 cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1536 1da177e4SLinus Torvalds	@echo  ''
1537 01dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
1538 1da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
1539 01dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
1540 1da177e4SLinus Torvalds	@echo  ''
1541 1da177e4SLinus Torvalds	@$(if $(boards), \
1542 1da177e4SLinus Torvalds		$(foreach b, $(boards), \
1543 4234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1544 1da177e4SLinus Torvalds		echo '')
1545 5dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
1546 5dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
1547 5dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1548 5dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
1549 5dffbe81SSegher Boessenkool		echo '')
1550 1da177e4SLinus Torvalds
1551 1da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1552 45d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1553 1da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1554 a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1555 a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1556 701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1557 af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1558 e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
1559 28bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
1560 28bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
1561 28bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1562 a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
1563 1da177e4SLinus Torvalds	@echo  ''
1564 1da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
1565 1da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
1566 1da177e4SLinus Torvalds
1567 1da177e4SLinus Torvalds
1568 5dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
1569 5dffbe81SSegher Boessenkool
1570 5dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
1571 5dffbe81SSegher Boessenkool
1572 fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1573 5dffbe81SSegher Boessenkool
1574 5dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
1575 5dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
1576 5dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
1577 5dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
1578 5dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1579 5dffbe81SSegher Boessenkool		echo '')
1580 5dffbe81SSegher Boessenkool
1581 5dffbe81SSegher Boessenkool
1582 1da177e4SLinus Torvalds# Documentation targets
1583 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1584 e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1585 e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
1586 22cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1587 bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1588 cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
1589 1da177e4SLinus Torvalds
1590 67274c08SMasahiro Yamada# Misc
1591 67274c08SMasahiro Yamada# ---------------------------------------------------------------------------
1592 67274c08SMasahiro Yamada
1593 67274c08SMasahiro YamadaPHONY += scripts_gdb
1594 7a739ce5SMasahiro Yamadascripts_gdb: prepare0
1595 1e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
1596 8d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1597 67274c08SMasahiro Yamada
1598 67274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
1599 67274c08SMasahiro Yamadaall: scripts_gdb
1600 67274c08SMasahiro Yamadaendif
1601 67274c08SMasahiro Yamada
1602 1da177e4SLinus Torvaldselse # KBUILD_EXTMOD
1603 1da177e4SLinus Torvalds
1604 1da177e4SLinus Torvalds###
1605 1da177e4SLinus Torvalds# External module support.
1606 1da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
1607 1da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
1608 1da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
1609 1da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
1610 1da177e4SLinus Torvalds# be used.
1611 1da177e4SLinus Torvalds#
1612 1da177e4SLinus Torvalds# The following are the only valid targets when building external
1613 1da177e4SLinus Torvalds# modules.
1614 1da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
1615 1da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
1616 1da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
1617 1da177e4SLinus Torvalds# make M=dir modules_install
1618 070b98bfSSam Ravnborg#                      Install the modules built in the module directory
1619 1da177e4SLinus Torvalds#                      Assumes install directory is already created
1620 1da177e4SLinus Torvalds
1621 1da177e4SLinus Torvalds# We are always building modules
1622 1da177e4SLinus TorvaldsKBUILD_MODULES := 1
1623 1da177e4SLinus Torvalds
1624 4f193362SPaul SmithPHONY += $(objtree)/Module.symvers
1625 1da177e4SLinus Torvalds$(objtree)/Module.symvers:
1626 1da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
1627 1da177e4SLinus Torvalds	echo; \
1628 1da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1629 1da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
1630 1da177e4SLinus Torvalds	echo )
1631 1da177e4SLinus Torvalds
1632 c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1633 c99f3918SMasahiro YamadaPHONY += modules
1634 c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers
1635 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1636 1da177e4SLinus Torvalds
1637 4f193362SPaul SmithPHONY += modules_install
1638 a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1639 a67dc21aSSam Ravnborg
1640 a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1641 4f193362SPaul SmithPHONY += _emodinst_
1642 a67dc21aSSam Ravnborg_emodinst_:
1643 a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1644 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1645 1da177e4SLinus Torvalds
1646 4f193362SPaul SmithPHONY += _emodinst_post
1647 a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1648 a67dc21aSSam Ravnborg	$(call cmd,depmod)
1649 a67dc21aSSam Ravnborg
1650 76cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
1651 bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
1652 1da177e4SLinus Torvalds
1653 d4945049SMasahiro YamadaPHONY += /
1654 d4945049SMasahiro Yamada/:
1655 d4945049SMasahiro Yamada	@echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1656 d4945049SMasahiro Yamada
1657 fe69b420SMasahiro YamadaPHONY += help
1658 1da177e4SLinus Torvaldshelp:
1659 1da177e4SLinus Torvalds	@echo  '  Building external modules.'
1660 1da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1661 1da177e4SLinus Torvalds	@echo  ''
1662 1da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
1663 1da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
1664 1da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
1665 1da177e4SLinus Torvalds	@echo  ''
1666 06300b21SSam Ravnborg
1667 059bc9fcSMasahiro YamadaPHONY += prepare
1668 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
1669 1da177e4SLinus Torvalds
1670 b1fbfcb4SMasahiro Yamada# Single targets
1671 b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1672 b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1673 b1fbfcb4SMasahiro Yamada#
1674 b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1675 b1fbfcb4SMasahiro Yamada#
1676 b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1677 b1fbfcb4SMasahiro Yamada#
1678 b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1679 b1fbfcb4SMasahiro Yamada#
1680 b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1681 b1fbfcb4SMasahiro Yamada
1682 b1fbfcb4SMasahiro Yamadaifdef single-build
1683 b1fbfcb4SMasahiro Yamada
1684 b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1685 b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1686 b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1687 b1fbfcb4SMasahiro Yamada
1688 b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1689 b1fbfcb4SMasahiro Yamada	@:
1690 b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1691 b1fbfcb4SMasahiro Yamada	@:
1692 b1fbfcb4SMasahiro Yamada
1693 b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1694 b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1695 b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1696 b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1697 b1fbfcb4SMasahiro Yamadaendif
1698 b1fbfcb4SMasahiro Yamada
1699 b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1700 b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko)
1701 b1fbfcb4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1702 b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1703 b1fbfcb4SMasahiro Yamada
1704 b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1705 b1fbfcb4SMasahiro Yamada
1706 b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1707 b1fbfcb4SMasahiro Yamada
1708 b1fbfcb4SMasahiro Yamada# trim unrelated directories
1709 b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1710 b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1711 b1fbfcb4SMasahiro Yamada
1712 b1fbfcb4SMasahiro Yamadaendif
1713 b1fbfcb4SMasahiro Yamada
1714 c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1715 c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1716 c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1717 c99f3918SMasahiro Yamada# make menuconfig etc.
1718 c99f3918SMasahiro Yamada# Error messages still appears in the original language
1719 c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1720 c99f3918SMasahiro Yamadadescend: $(build-dirs)
1721 c99f3918SMasahiro Yamada$(build-dirs): prepare
1722 b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
1723 f566e1fbSMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \
1724 b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1725 c99f3918SMasahiro Yamada
1726 76cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
1727 76cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
1728 76cd306dSMasahiro Yamada$(clean-dirs):
1729 76cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1730 76cd306dSMasahiro Yamada
1731 88d7be03SMichal Marekclean: $(clean-dirs)
1732 88d7be03SMichal Marek	$(call cmd,rmdirs)
1733 88d7be03SMichal Marek	$(call cmd,rmfiles)
1734 43f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1735 ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1736 4f0e3a57SRob Herring		-o -name '*.ko.*' \
1737 4f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1738 ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1739 bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
1740 88d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1741 9a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
1742 4fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
1743 88d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
1744 8b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
1745 6b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1746 433db3e2SVinícius Tinti		-o -name '*.ll' \
1747 88d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
1748 88d7be03SMichal Marek
1749 1da177e4SLinus Torvalds# Generate tags for editors
1750 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1751 a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1752 858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1753 1da177e4SLinus Torvalds
1754 f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
1755 1da177e4SLinus Torvalds	$(call cmd,tags)
1756 1da177e4SLinus Torvalds
1757 eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1758 eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1759 eb8305aeSMatthias Maennich
1760 eb8305aeSMatthias MaennichPHONY += nsdeps
1761 bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1762 eb8305aeSMatthias Maennichnsdeps: modules
1763 bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1764 eb8305aeSMatthias Maennich
1765 1da177e4SLinus Torvalds# Scripts to check various things for consistency
1766 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1767 1da177e4SLinus Torvalds
1768 279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1769 279f3dd3SPeter Foley
1770 1da177e4SLinus Torvaldsincludecheck:
1771 436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1772 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1773 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1774 1da177e4SLinus Torvalds
1775 1da177e4SLinus Torvaldsversioncheck:
1776 2ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1777 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1778 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1779 1da177e4SLinus Torvalds
1780 74425eeeSNicolas Palixcoccicheck:
1781 858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
1782 74425eeeSNicolas Palix
1783 1da177e4SLinus Torvaldsnamespacecheck:
1784 1da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
1785 1da177e4SLinus Torvalds
1786 295ac051SAdrian Bunkexport_report:
1787 295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1788 295ac051SAdrian Bunk
1789 c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1790 e3ccf6e3SJeff Dike
1791 011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1792 011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1793 011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1794 011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1795 011e3a9aSJeff Dikeifeq ($(ARCH), um)
1796 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1797 011e3a9aSJeff Dikeelse
1798 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1799 011e3a9aSJeff Dikeendif
1800 1da177e4SLinus Torvaldscheckstack:
1801 1da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1802 75dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1803 1da177e4SLinus Torvalds
1804 7b8ea53dSAmerigo Wangkernelrelease:
1805 7b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1806 01ab1788SAmerigo Wang
1807 cb58455cSSam Ravnborgkernelversion:
1808 2244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
1809 1da177e4SLinus Torvalds
1810 c398ff00SMike Marciniszynimage_name:
1811 c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1812 c398ff00SMike Marciniszyn
1813 ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1814 f47a23ceSMasahiro Yamada
1815 f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1816 f47a23ceSMasahiro Yamadatools_silent=s
1817 f47a23ceSMasahiro Yamadaendif
1818 f47a23ceSMasahiro Yamada
1819 ea01fa9fSBorislav Petkovtools/: FORCE
1820 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1821 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1822 ea01fa9fSBorislav Petkov
1823 ea01fa9fSBorislav Petkovtools/%: FORCE
1824 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1825 75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1826 ea01fa9fSBorislav Petkov
1827 1da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
1828 1da177e4SLinus Torvalds# ===========================================================================
1829 1da177e4SLinus Torvalds
1830 1da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1831 1da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
1832 1da177e4SLinus Torvalds
1833 1da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1834 1da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
1835 1da177e4SLinus Torvalds
1836 bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
1837 50a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1838 569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1839 5a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
1840 50a8ec31SSam Ravnborg
1841 392885eeSMasahiro Yamada# read saved command lines for existing targets
1842 392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
1843 1da177e4SLinus Torvalds
1844 b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
1845 1da177e4SLinus Torvalds
1846 46b7c492SSZ Lin (林上智)endif # config-build
1847 2042b548SMasahiro Yamadaendif # mixed-build
1848 688931a5SMasahiro Yamadaendif # need-sub-make
1849 1da177e4SLinus Torvalds
1850 4f193362SPaul SmithPHONY += FORCE
1851 1da177e4SLinus TorvaldsFORCE:
1852 4f193362SPaul Smith
1853 bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1854 fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
1855 4f193362SPaul Smith.PHONY: $(PHONY)
1856