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android / kernel / common / refs/heads/android13-5.15 / . / Makefile
blob: 95df00ff8a9cf382111b880cd6b2682b1771ca88 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +0100[diff] [blame]1# SPDX-License-Identifier: GPL-2.0
Linus Torvaldsbfeffd12019-01-06 17:08:20 -0800[diff] [blame]2VERSION = 5
Linus Torvalds6880fa62021-09-12 16:28:37 -0700[diff] [blame]3PATCHLEVEL = 15
Greg Kroah-Hartman57436262024-03-06 14:38:51 +0000[diff] [blame]4SUBLEVEL = 151
Linus Torvalds8bb7eca92021-10-31 13:53:10 -0700[diff] [blame]5EXTRAVERSION =
6NAME = Trick or Treat
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]7
8# *DOCUMENTATION*
9# To see a list of typical targets execute "make help"
10# More info can be located in ./README
11# Comments in this file are targeted only to the developer, do not
12# expect to learn how to build the kernel reading this file.
13
Masahiro Yamada121c2a12020-05-11 12:50:13 +0900[diff] [blame]14$(if $(filter __%, $(MAKECMDGOALS)), \
15 $(error targets prefixed with '__' are only for internal use))
16
Masahiro Yamadaba634ec2017-10-04 12:56:05 +0900[diff] [blame]17# That's our default target when none is given on the command line
Masahiro Yamada121c2a12020-05-11 12:50:13 +0900[diff] [blame]18PHONY := __all
19__all:
Masahiro Yamadaba634ec2017-10-04 12:56:05 +0900[diff] [blame]20
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]21# We are using a recursive build, so we need to do a little thinking
22# to get the ordering right.
23#
24# Most importantly: sub-Makefiles should only ever modify files in
25# their own directory. If in some directory we have a dependency on
26# a file in another dir (which doesn't happen often, but it's often
Nicholas Pigginf49821e2018-02-11 00:25:04 +1000[diff] [blame]27# unavoidable when linking the built-in.a targets which finally
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]28# turn into vmlinux), we will call a sub make in that other dir, and
29# after that we are sure that everything which is in that other dir
30# is now up to date.
31#
32# The only cases where we need to modify files which have global
33# effects are thus separated out and done before the recursive
34# descending is started. They are now explicitly listed as the
35# prepare rule.
36
Masahiro Yamada221cc2d2019-03-26 13:02:19 +0900[diff] [blame]37ifneq ($(sub_make_done),1)
Masahiro Yamada3812b8c2019-02-22 16:40:07 +0900[diff] [blame]38
39# Do not use make's built-in rules and variables
40# (this increases performance and avoids hard-to-debug behaviour)
41MAKEFLAGS += -rR
42
43# Avoid funny character set dependencies
44unexport LC_ALL
45LC_COLLATE=C
46LC_NUMERIC=C
47export LC_COLLATE LC_NUMERIC
48
49# Avoid interference with shell env settings
50unexport GREP_OPTIONS
51
Michal Marek066b7ed2014-07-04 14:29:30 +0200[diff] [blame]52# Beautify output
53# ---------------------------------------------------------------------------
54#
55# Normally, we echo the whole command before executing it. By making
56# that echo $($(quiet)$(cmd)), we now have the possibility to set
57# $(quiet) to choose other forms of output instead, e.g.
58#
59# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
60# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
61#
62# If $(quiet) is empty, the whole command will be printed.
63# If it is set to "quiet_", only the short version will be printed.
64# If it is set to "silent_", nothing will be printed at all, since
65# the variable $(silent_cmd_cc_o_c) doesn't exist.
66#
67# A simple variant is to prefix commands with $(Q) - that's useful
68# for commands that shall be hidden in non-verbose mode.
69#
70# $(Q)ln $@ :<
71#
72# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
73# If KBUILD_VERBOSE equals 1 then the above command is displayed.
Randy Dunlap505b12b2020-02-12 20:40:57 -0800[diff] [blame]74# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
Michal Marek066b7ed2014-07-04 14:29:30 +0200[diff] [blame]75#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]76# To put more focus on warnings, be less verbose as default
77# Use 'make V=1' to see the full commands
78
Cheng Renquanb8b06182009-05-26 16:03:07 +0800[diff] [blame]79ifeq ("$(origin V)", "command line")
80 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]81endif
82ifndef KBUILD_VERBOSE
83 KBUILD_VERBOSE = 0
84endif
85
Michal Marek066b7ed2014-07-04 14:29:30 +0200[diff] [blame]86ifeq ($(KBUILD_VERBOSE),1)
87 quiet =
88 Q =
89else
90 quiet=quiet_
91 Q = @
92endif
93
94# If the user is running make -s (silent mode), suppress echoing of
95# commands
Dmitry Goncharovd2fb2732022-12-05 16:48:19 -0500[diff] [blame]96# make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
Michal Marek066b7ed2014-07-04 14:29:30 +0200[diff] [blame]97
Dmitry Goncharovd2fb2732022-12-05 16:48:19 -0500[diff] [blame]98ifeq ($(filter 3.%,$(MAKE_VERSION)),)
99silence:=$(findstring s,$(firstword -$(MAKEFLAGS)))
100else
101silence:=$(findstring s,$(filter-out --%,$(MAKEFLAGS)))
102endif
103
104ifeq ($(silence),s)
105quiet=silent_
106KBUILD_VERBOSE = 0
Michal Marek066b7ed2014-07-04 14:29:30 +0200[diff] [blame]107endif
Michal Marek066b7ed2014-07-04 14:29:30 +0200[diff] [blame]108
109export quiet Q KBUILD_VERBOSE
110
Masahiro Yamadabcf637f2021-02-22 01:53:06 +0900[diff] [blame]111# Call a source code checker (by default, "sparse") as part of the
112# C compilation.
113#
114# Use 'make C=1' to enable checking of only re-compiled files.
115# Use 'make C=2' to enable checking of *all* source files, regardless
116# of whether they are re-compiled or not.
117#
118# See the file "Documentation/dev-tools/sparse.rst" for more details,
119# including where to get the "sparse" utility.
120
121ifeq ("$(origin C)", "command line")
122 KBUILD_CHECKSRC = $(C)
123endif
124ifndef KBUILD_CHECKSRC
125 KBUILD_CHECKSRC = 0
126endif
127
128export KBUILD_CHECKSRC
129
130# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
131# directory of external module to build. Setting M= takes precedence.
132ifeq ("$(origin M)", "command line")
133 KBUILD_EXTMOD := $(M)
134endif
135
136$(if $(word 2, $(KBUILD_EXTMOD)), \
137 $(error building multiple external modules is not supported))
138
Masahiro Yamada74ee5852021-06-02 23:02:13 +0900[diff] [blame]139# Remove trailing slashes
140ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
141KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
142endif
143
Masahiro Yamadabcf637f2021-02-22 01:53:06 +0900[diff] [blame]144export KBUILD_EXTMOD
145
Elliot Bermanee1b16e2021-04-07 08:03:11 -0700[diff] [blame]146# ANDROID: set up mixed-build support. mixed-build allows device kernel modules
147# to be compiled against a GKI kernel. This approach still uses the headers and
148# Kbuild from device kernel, so care must be taken to ensure that those headers match.
149ifdef KBUILD_MIXED_TREE
150# Need vmlinux.symvers for modpost and System.map for depmod, check whether they exist in KBUILD_MIXED_TREE
151required_mixed_files=vmlinux.symvers System.map
152$(if $(filter-out $(words $(required_mixed_files)), \
153 $(words $(wildcard $(add-prefix $(KBUILD_MIXED_TREE)/,$(required_mixed_files))))),,\
154 $(error KBUILD_MIXED_TREE=$(KBUILD_MIXED_TREE) doesn't contain $(required_mixed_files)))
155endif
156
157mixed-build-prefix = $(if $(KBUILD_MIXED_TREE),$(KBUILD_MIXED_TREE)/)
158export KBUILD_MIXED_TREE
Yifan Hong99f05a02021-11-10 15:44:37 -0800[diff] [blame]159# This is a hack for kleaf to set mixed-build-prefix within the execution of a make rule, e.g.
160# within __modinst_pre.
161# TODO(b/205893923): Revert this hack once it is properly handled.
162export mixed-build-prefix
Elliot Bermanee1b16e2021-04-07 08:03:11 -0700[diff] [blame]163
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]164# Kbuild will save output files in the current working directory.
165# This does not need to match to the root of the kernel source tree.
166#
167# For example, you can do this:
168#
169# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
170#
171# If you want to save output files in a different location, there are
172# two syntaxes to specify it.
173#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]174# 1) O=
175# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200[diff] [blame]176#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]177# 2) Set KBUILD_OUTPUT
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]178# Set the environment variable KBUILD_OUTPUT to point to the output directory.
179# export KBUILD_OUTPUT=dir/to/store/output/files/; make
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]180#
181# The O= assignment takes precedence over the KBUILD_OUTPUT environment
182# variable.
183
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]184# Do we want to change the working directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800[diff] [blame]185ifeq ("$(origin O)", "command line")
186 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]187endif
188
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]189ifneq ($(KBUILD_OUTPUT),)
190# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
191# expand a shell special character '~'. We use a somewhat tedious way here.
192abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
193$(if $(abs_objtree),, \
194 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
195
196# $(realpath ...) resolves symlinks
197abs_objtree := $(realpath $(abs_objtree))
198else
199abs_objtree := $(CURDIR)
200endif # ifneq ($(KBUILD_OUTPUT),)
201
202ifeq ($(abs_objtree),$(CURDIR))
203# Suppress "Entering directory ..." unless we are changing the work directory.
204MAKEFLAGS += --no-print-directory
205else
206need-sub-make := 1
Robert Jarzmik51193b72016-04-02 21:38:53 +0200[diff] [blame]207endif
208
Masahiro Yamada30cef682021-02-22 01:50:19 +0900[diff] [blame]209this-makefile := $(lastword $(MAKEFILE_LIST))
210abs_srctree := $(realpath $(dir $(this-makefile)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]211
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]212ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
213$(error source directory cannot contain spaces or colons)
214endif
215
216ifneq ($(abs_srctree),$(abs_objtree))
Masahiro Yamada80463f12018-09-14 15:33:23 +0900[diff] [blame]217# Look for make include files relative to root of kernel src
218#
Masahiro Yamadad82856392021-07-25 03:35:56 +0900[diff] [blame]219# --included-dir is added for backward compatibility, but you should not rely on
220# it. Please add $(srctree)/ prefix to include Makefiles in the source tree.
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]221MAKEFLAGS += --include-dir=$(abs_srctree)
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]222endif
Masahiro Yamada3812b8c2019-02-22 16:40:07 +0900[diff] [blame]223
Masahiro Yamada688931a2019-03-19 13:02:36 +0900[diff] [blame]224ifneq ($(filter 3.%,$(MAKE_VERSION)),)
225# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
226# We need to invoke sub-make to avoid implicit rules in the top Makefile.
227need-sub-make := 1
228# Cancel implicit rules for this Makefile.
Masahiro Yamada93fdddf2020-05-11 12:50:12 +0900[diff] [blame]229$(this-makefile): ;
Masahiro Yamada688931a2019-03-19 13:02:36 +0900[diff] [blame]230endif
231
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]232export abs_srctree abs_objtree
Masahiro Yamada221cc2d2019-03-26 13:02:19 +0900[diff] [blame]233export sub_make_done := 1
234
Masahiro Yamada688931a2019-03-19 13:02:36 +0900[diff] [blame]235ifeq ($(need-sub-make),1)
236
Masahiro Yamada121c2a12020-05-11 12:50:13 +0900[diff] [blame]237PHONY += $(MAKECMDGOALS) __sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500[diff] [blame]238
Masahiro Yamada121c2a12020-05-11 12:50:13 +0900[diff] [blame]239$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
Charles Keepax16f89092012-10-15 13:49:12 +0100[diff] [blame]240 @:
Milton Miller0b357862007-09-21 18:09:02 -0500[diff] [blame]241
Cao jinc4e6fff2017-06-30 10:45:43 +0800[diff] [blame]242# Invoke a second make in the output directory, passing relevant variables
Masahiro Yamada121c2a12020-05-11 12:50:13 +0900[diff] [blame]243__sub-make:
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]244 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]245
Masahiro Yamada688931a2019-03-19 13:02:36 +0900[diff] [blame]246endif # need-sub-make
Masahiro Yamada221cc2d2019-03-26 13:02:19 +0900[diff] [blame]247endif # sub_make_done
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]248
249# We process the rest of the Makefile if this is the final invocation of make
Masahiro Yamada688931a2019-03-19 13:02:36 +0900[diff] [blame]250ifeq ($(need-sub-make),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]251
Masahiro Yamada7ff52572014-09-09 20:02:22 +0900[diff] [blame]252# Do not print "Entering directory ...",
253# but we want to display it when entering to the output directory
254# so that IDEs/editors are able to understand relative filenames.
255MAKEFLAGS += --no-print-directory
256
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]257ifeq ($(abs_srctree),$(abs_objtree))
Michal Marek9da07632014-04-25 23:25:18 +0200[diff] [blame]258 # building in the source tree
259 srctree := .
Masahiro Yamada051f2782019-07-06 12:07:12 +0900[diff] [blame]260 building_out_of_srctree :=
Michal Marek9da07632014-04-25 23:25:18 +0200[diff] [blame]261else
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]262 ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
Michal Marek9da07632014-04-25 23:25:18 +0200[diff] [blame]263 # building in a subdirectory of the source tree
264 srctree := ..
265 else
Masahiro Yamada25b146c52019-03-30 21:04:14 +0900[diff] [blame]266 srctree := $(abs_srctree)
Michal Marek9da07632014-04-25 23:25:18 +0200[diff] [blame]267 endif
Masahiro Yamada051f2782019-07-06 12:07:12 +0900[diff] [blame]268 building_out_of_srctree := 1
Michal Marek9da07632014-04-25 23:25:18 +0200[diff] [blame]269endif
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]270
Masahiro Yamada95fd3f82019-07-06 12:07:13 +0900[diff] [blame]271ifneq ($(KBUILD_ABS_SRCTREE),)
272srctree := $(abs_srctree)
273endif
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]274
Michal Marek7e1c0472014-04-25 17:29:45 +0200[diff] [blame]275objtree := .
Masahiro Yamada6b12de62019-02-22 16:40:09 +0900[diff] [blame]276VPATH := $(srctree)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]277
Masahiro Yamada051f2782019-07-06 12:07:12 +0900[diff] [blame]278export building_out_of_srctree srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]279
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]280# To make sure we do not include .config for any of the *config targets
281# catch them early, and hand them over to scripts/kconfig/Makefile
282# It is allowed to specify more targets when calling make, including
283# mixing *config targets and build targets.
284# For example 'make oldconfig all'.
285# Detect when mixed targets is specified, and make a second invocation
286# of make so .config is not included in this case either (for *config).
287
288version_h := include/generated/uapi/linux/version.h
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]289
Masahiro Yamada22340a02018-02-11 17:40:29 +0900[diff] [blame]290clean-targets := %clean mrproper cleandocs
291no-dot-config-targets := $(clean-targets) \
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]292 cscope gtags TAGS tags help% %docs check% coccicheck \
Masahiro Yamada59b2bd02019-06-04 19:14:02 +0900[diff] [blame]293 $(version_h) headers headers_% archheaders archscripts \
David Engraf46239802020-03-26 20:29:33 +0100[diff] [blame]294 %asm-generic kernelversion %src-pkg dt_binding_check \
295 outputmakefile
Masahiro Yamada805b2e12021-02-28 15:10:28 +0900[diff] [blame]296# Installation targets should not require compiler. Unfortunately, vdso_install
297# is an exception where build artifacts may be updated. This must be fixed.
298no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
299 headers_install modules_install kernelrelease image_name
Masahiro Yamada993bdde2021-02-28 15:10:25 +0900[diff] [blame]300no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
301 image_name
Masahiro Yamada394053f2019-08-15 00:19:18 +0900[diff] [blame]302single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]303
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]304config-build :=
305mixed-build :=
306need-config := 1
Masahiro Yamada805b2e12021-02-28 15:10:28 +0900[diff] [blame]307need-compiler := 1
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]308may-sync-config := 1
Masahiro Yamada394053f2019-08-15 00:19:18 +0900[diff] [blame]309single-build :=
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]310
311ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
312 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]313 need-config :=
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]314 endif
315endif
316
Masahiro Yamada805b2e12021-02-28 15:10:28 +0900[diff] [blame]317ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
318 ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
319 need-compiler :=
320 endif
321endif
322
Masahiro Yamadad7942412018-07-20 16:46:34 +0900[diff] [blame]323ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
324 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]325 may-sync-config :=
Masahiro Yamadad7942412018-07-20 16:46:34 +0900[diff] [blame]326 endif
327endif
328
329ifneq ($(KBUILD_EXTMOD),)
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]330 may-sync-config :=
Masahiro Yamadad7942412018-07-20 16:46:34 +0900[diff] [blame]331endif
332
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]333ifeq ($(KBUILD_EXTMOD),)
Masahiro Yamadaefbf9722020-08-12 23:49:23 +0900[diff] [blame]334 ifneq ($(filter %config,$(MAKECMDGOALS)),)
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]335 config-build := 1
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]336 ifneq ($(words $(MAKECMDGOALS)),1)
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]337 mixed-build := 1
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]338 endif
339 endif
340endif
Masahiro Yamada22340a02018-02-11 17:40:29 +0900[diff] [blame]341
Masahiro Yamada394053f2019-08-15 00:19:18 +0900[diff] [blame]342# We cannot build single targets and the others at the same time
343ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
344 single-build := 1
345 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
346 mixed-build := 1
347 endif
348endif
349
Masahiro Yamada22340a02018-02-11 17:40:29 +0900[diff] [blame]350# For "make -j clean all", "make -j mrproper defconfig all", etc.
351ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
352 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]353 mixed-build := 1
Masahiro Yamada22340a02018-02-11 17:40:29 +0900[diff] [blame]354 endif
355endif
356
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]357# install and modules_install need also be processed one by one
358ifneq ($(filter install,$(MAKECMDGOALS)),)
359 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]360 mixed-build := 1
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]361 endif
362endif
363
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]364ifdef mixed-build
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]365# ===========================================================================
366# We're called with mixed targets (*config and build targets).
367# Handle them one by one.
368
369PHONY += $(MAKECMDGOALS) __build_one_by_one
370
Masahiro Yamada121c2a12020-05-11 12:50:13 +0900[diff] [blame]371$(MAKECMDGOALS): __build_one_by_one
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]372 @:
373
374__build_one_by_one:
375 $(Q)set -e; \
376 for i in $(MAKECMDGOALS); do \
377 $(MAKE) -f $(srctree)/Makefile $$i; \
378 done
379
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]380else # !mixed-build
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]381
Masahiro Yamada3204a7f2021-02-28 15:10:26 +0900[diff] [blame]382include $(srctree)/scripts/Kbuild.include
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]383
384# Read KERNELRELEASE from include/config/kernel.release (if it exists)
385KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
386KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
387export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
388
Masahiro Yamada3204a7f2021-02-28 15:10:26 +0900[diff] [blame]389include $(srctree)/scripts/subarch.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]390
391# Cross compiling and selecting different set of gcc/bin-utils
392# ---------------------------------------------------------------------------
393#
394# When performing cross compilation for other architectures ARCH shall be set
395# to the target architecture. (See arch/* for the possibilities).
396# ARCH can be set during invocation of make:
397# make ARCH=ia64
398# Another way is to have ARCH set in the environment.
399# The default ARCH is the host where make is executed.
400
401# CROSS_COMPILE specify the prefix used for all executables used
402# during compilation. Only gcc and related bin-utils executables
403# are prefixed with $(CROSS_COMPILE).
404# CROSS_COMPILE can be set on the command line
405# make CROSS_COMPILE=ia64-linux-
406# Alternatively CROSS_COMPILE can be set in the environment.
407# Default value for CROSS_COMPILE is not to prefix executables
408# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200[diff] [blame]409ARCH ?= $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]410
411# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200[diff] [blame]412UTS_MACHINE := $(ARCH)
413SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]414
Sam Ravnborgd746d642007-11-12 20:14:19 +0100[diff] [blame]415# Additional ARCH settings for x86
416ifeq ($(ARCH),i386)
417 SRCARCH := x86
418endif
419ifeq ($(ARCH),x86_64)
420 SRCARCH := x86
421endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200[diff] [blame]422
Sam Ravnborg5e538792008-12-02 23:17:12 -0800[diff] [blame]423# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000[diff] [blame]424ifeq ($(ARCH),sparc32)
425 SRCARCH := sparc
426endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200[diff] [blame]427ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800[diff] [blame]428 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200[diff] [blame]429endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200[diff] [blame]430
Masahiro Yamada5f6e0fe02021-06-10 11:03:31 +0900[diff] [blame]431# Additional ARCH settings for parisc
432ifeq ($(ARCH),parisc64)
433 SRCARCH := parisc
434endif
435
Masahiro Yamadaf02aa482021-04-10 23:31:58 +0900[diff] [blame]436export cross_compiling :=
437ifneq ($(SRCARCH),$(SUBARCH))
438cross_compiling := 1
439endif
440
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700[diff] [blame]441KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500[diff] [blame]442export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700[diff] [blame]443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]444# SHELL used by kbuild
Masahiro Yamada858805b2019-08-25 22:28:37 +0900[diff] [blame]445CONFIG_SHELL := sh
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]446
Masahiro Yamada6d79a7b2018-07-12 19:38:36 +0900[diff] [blame]447HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
448HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
449HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
Uwe Kleine-Königd7f14c62017-07-09 20:02:36 +0200[diff] [blame]450
Masahiro Yamadaa0d1c952020-04-08 10:36:23 +0900[diff] [blame]451ifneq ($(LLVM),)
452HOSTCC = clang
453HOSTCXX = clang++
454else
455HOSTCC = gcc
456HOSTCXX = g++
457endif
Chun-Tse Shao1d152432022-04-01 23:18:02 +0000[diff] [blame]458HOSTPKG_CONFIG = pkg-config
Masahiro Yamada7f3a59d2020-04-29 12:45:14 +0900[diff] [blame]459
Elliot Bermandf704102022-01-12 12:14:58 -0800[diff] [blame]460KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
461 -O2 -fomit-frame-pointer -std=gnu89
462KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
463KBUILD_USERLDFLAGS := $(USERLDFLAGS)
Masahiro Yamada7f3a59d2020-04-29 12:45:14 +0900[diff] [blame]464
Elliot Bermandf704102022-01-12 12:14:58 -0800[diff] [blame]465KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
Masahiro Yamada735aab12020-03-25 12:14:32 +0900[diff] [blame]466KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
Laura Abbottf92d19e2018-07-09 17:46:02 -0700[diff] [blame]467KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
468KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]470# Make variables (CC, etc...)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]471CPP = $(CC) -E
Masahiro Yamadaa0d1c952020-04-08 10:36:23 +0900[diff] [blame]472ifneq ($(LLVM),)
473CC = clang
474LD = ld.lld
475AR = llvm-ar
476NM = llvm-nm
477OBJCOPY = llvm-objcopy
478OBJDUMP = llvm-objdump
479READELF = llvm-readelf
Masahiro Yamadaa0d1c952020-04-08 10:36:23 +0900[diff] [blame]480STRIP = llvm-strip
481else
482CC = $(CROSS_COMPILE)gcc
483LD = $(CROSS_COMPILE)ld
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]484AR = $(CROSS_COMPILE)ar
485NM = $(CROSS_COMPILE)nm
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]486OBJCOPY = $(CROSS_COMPILE)objcopy
487OBJDUMP = $(CROSS_COMPILE)objdump
Dmitry Golovineefb8c12019-12-05 00:54:41 +0200[diff] [blame]488READELF = $(CROSS_COMPILE)readelf
Masahiro Yamadaa0d1c952020-04-08 10:36:23 +0900[diff] [blame]489STRIP = $(CROSS_COMPILE)strip
490endif
Andrii Nakryikoe83b9f52019-04-02 09:49:50 -0700[diff] [blame]491PAHOLE = pahole
Jiri Olsac9a0f3b2020-07-11 23:53:24 +0200[diff] [blame]492RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
Masahiro Yamada73a4f6d2017-12-10 01:02:28 +0900[diff] [blame]493LEX = flex
494YACC = bison
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]495AWK = awk
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200[diff] [blame]496INSTALLKERNEL := installkernel
Dominique Martinet436e9802020-12-01 14:17:30 +0100[diff] [blame]497DEPMOD = depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]498PERL = perl
Masahiro Yamadae9781b52018-03-13 18:12:02 +0900[diff] [blame]499PYTHON3 = python3
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]500CHECK = sparse
Masahiro Yamada858805b2019-08-25 22:28:37 +0900[diff] [blame]501BASH = bash
Denis Efremove4a42c82020-06-08 12:59:44 +0300[diff] [blame]502KGZIP = gzip
503KBZIP2 = bzip2
504KLZOP = lzop
Denis Efremov8dfb61d2020-06-05 10:39:55 +0300[diff] [blame]505LZMA = lzma
Alistair Delva76a0d392020-06-17 21:55:14 -0700[diff] [blame]506LZ4 = lz4
Denis Efremov8dfb61d2020-06-05 10:39:55 +0300[diff] [blame]507XZ = xz
Nick Terrell48f7ddf2020-07-30 12:08:36 -0700[diff] [blame]508ZSTD = zstd
Denis Efremov8dfb61d2020-06-05 10:39:55 +0300[diff] [blame]509
Jiri Olsa0baced02022-09-04 15:19:00 +0200[diff] [blame]510PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
511
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100[diff] [blame]512CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
Luc Van Oostenryck6c49f352018-02-15 22:07:50 +0100[diff] [blame]513 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
Douglas Anderson0c22be02019-03-14 16:41:59 -0700[diff] [blame]514NOSTDINC_FLAGS :=
Sam Ravnborg65881692010-07-28 17:33:09 +0200[diff] [blame]515CFLAGS_MODULE =
516AFLAGS_MODULE =
517LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]518CFLAGS_KERNEL =
519AFLAGS_KERNEL =
Michal Marekb36fad62016-06-07 11:57:02 +0200[diff] [blame]520LDFLAGS_vmlinux =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]521
David Howellsabbf1592012-10-02 18:01:26 +0100[diff] [blame]522# Use USERINCLUDE when you must reference the UAPI directories only.
523USERINCLUDE := \
Masahiro Yamada9d022c52017-10-04 12:56:04 +0900[diff] [blame]524 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
525 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
David Howellsabbf1592012-10-02 18:01:26 +0100[diff] [blame]526 -I$(srctree)/include/uapi \
Arnd Bergmann3308b282016-06-15 17:45:45 +0200[diff] [blame]527 -I$(objtree)/include/generated/uapi \
Masahiro Yamadace6ed1c2021-03-04 20:37:08 +0900[diff] [blame]528 -include $(srctree)/include/linux/compiler-version.h \
David Howellsabbf1592012-10-02 18:01:26 +0100[diff] [blame]529 -include $(srctree)/include/linux/kconfig.h
530
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]531# Use LINUXINCLUDE when you must reference the include/ directory.
532# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100[diff] [blame]533LINUXINCLUDE := \
Masahiro Yamada9d022c52017-10-04 12:56:04 +0900[diff] [blame]534 -I$(srctree)/arch/$(SRCARCH)/include \
535 -I$(objtree)/arch/$(SRCARCH)/include/generated \
Masahiro Yamada051f2782019-07-06 12:07:12 +0900[diff] [blame]536 $(if $(building_out_of_srctree),-I$(srctree)/include) \
Masahiro Yamadaf8224f72017-06-06 16:15:28 +0900[diff] [blame]537 -I$(objtree)/include \
538 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]539
Masahiro Yamada42a92bc2018-12-14 17:05:37 +0900[diff] [blame]540KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
Masahiro Yamadaeeb56872018-12-14 17:05:38 +0900[diff] [blame]541KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
Masahiro Yamada42a92bc2018-12-14 17:05:37 +0900[diff] [blame]542 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
Luc Van Oostenryckb89f25e2019-03-04 13:55:20 +0100[diff] [blame]543 -Werror=implicit-function-declaration -Werror=implicit-int \
Olaf Hering172aad81a2020-10-11 20:54:31 +0200[diff] [blame]544 -Werror=return-type -Wno-format-security \
Masahiro Yamada433dc2e2017-10-12 18:22:25 +0900[diff] [blame]545 -std=gnu89
546KBUILD_CPPFLAGS := -D__KERNEL__
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200[diff] [blame]547KBUILD_AFLAGS_KERNEL :=
548KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg65881692010-07-28 17:33:09 +0200[diff] [blame]549KBUILD_AFLAGS_MODULE := -DMODULE
550KBUILD_CFLAGS_MODULE := -DMODULE
Masahiro Yamada10df0632019-08-15 01:06:22 +0900[diff] [blame]551KBUILD_LDFLAGS_MODULE :=
Masahiro Yamadad503ac52018-08-24 08:20:39 +0900[diff] [blame]552KBUILD_LDFLAGS :=
Masahiro Yamada5241ab4c2019-07-29 18:15:17 +0900[diff] [blame]553CLANG_FLAGS :=
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]554
Chun-Tse Shao1d152432022-04-01 23:18:02 +0000[diff] [blame]555export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
Vasily Gorbikd9b56652020-10-23 13:57:32 +0200[diff] [blame]556export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
Masahiro Yamadad8d2d382021-02-01 10:00:24 +0900[diff] [blame]557export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
Nick Terrell48f7ddf2020-07-30 12:08:36 -0700[diff] [blame]558export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
Vasily Gorbik7bac9872019-01-21 13:54:39 +0100[diff] [blame]559export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
Elliot Bermandf704102022-01-12 12:14:58 -0800[diff] [blame]560export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]561
Masahiro Yamadad503ac52018-08-24 08:20:39 +0900[diff] [blame]562export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
Andrey Konovalov0e410e12018-02-06 15:36:00 -0800[diff] [blame]563export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Sam Ravnborg222d3942007-10-15 21:59:31 +0200[diff] [blame]564export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200[diff] [blame]565export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200[diff] [blame]566export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Jiri Olsa0baced02022-09-04 15:19:00 +0200[diff] [blame]567export PAHOLE_FLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]568
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]569# Files to ignore in find ... statements
570
Prarit Bhargavaae63b2d2014-02-06 07:51:42 -0500[diff] [blame]571export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
572 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
573 -prune -o
Jesper Juhl450c6072012-02-16 22:49:15 +0100[diff] [blame]574export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
575 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]576
577# ===========================================================================
578# Rules shared between *config targets and build targets
579
Cao jin312a3d02017-08-02 10:31:06 +0800[diff] [blame]580# Basic helpers built in scripts/basic/
Paul Smith4f193362006-03-05 17:14:10 -0500[diff] [blame]581PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]582scripts_basic:
583 $(Q)$(MAKE) $(build)=scripts/basic
584
Paul Smith4f193362006-03-05 17:14:10 -0500[diff] [blame]585PHONY += outputmakefile
Masahiro Yamada2728fcf2021-05-17 16:03:11 +0900[diff] [blame]586ifdef building_out_of_srctree
Masahiro Yamadae8e83a22019-08-22 13:46:11 +0900[diff] [blame]587# Before starting out-of-tree build, make sure the source tree is clean.
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200[diff] [blame]588# outputmakefile generates a Makefile in the output directory, if using a
589# separate output directory. This allows convenient use of make in the
590# output directory.
Vladimir Kondratiev3a51ff32019-02-03 10:48:40 +0200[diff] [blame]591# At the same time when output Makefile generated, generate .gitignore to
592# ignore whole output directory
Masahiro Yamada2728fcf2021-05-17 16:03:11 +0900[diff] [blame]593
594quiet_cmd_makefile = GEN Makefile
595 cmd_makefile = { \
596 echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
597 echo "include $(srctree)/Makefile"; \
598 } > Makefile
599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]600outputmakefile:
Masahiro Yamadae8e83a22019-08-22 13:46:11 +0900[diff] [blame]601 $(Q)if [ -f $(srctree)/.config -o \
602 -d $(srctree)/include/config -o \
603 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
604 echo >&2 "***"; \
605 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
606 echo >&2 "*** in $(abs_srctree)";\
607 echo >&2 "***"; \
608 false; \
609 fi
Andi Kleen92979992009-01-10 04:56:13 +0100[diff] [blame]610 $(Q)ln -fsn $(srctree) source
Masahiro Yamada2728fcf2021-05-17 16:03:11 +0900[diff] [blame]611 $(call cmd,makefile)
Masahiro Yamada156e7cb2019-03-26 13:26:58 +0900[diff] [blame]612 $(Q)test -e .gitignore || \
613 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200[diff] [blame]614endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]615
Nick Desaulniersdb075622021-02-05 14:01:25 -0800[diff] [blame]616# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
617# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
618# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
619# and from include/config/auto.conf.cmd to detect the compiler upgrade.
Masahiro Yamada6072b2c2021-08-01 11:53:46 +0900[diff] [blame]620CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
Nick Desaulniersdb075622021-02-05 14:01:25 -0800[diff] [blame]621
622ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
Nick Desaulniers6f5b41a2021-08-02 11:39:08 -0700[diff] [blame]623include $(srctree)/scripts/Makefile.clang
Chris Friesae6b2892017-11-07 11:46:13 -0800[diff] [blame]624endif
625
Masahiro Yamada57fd2512021-02-28 15:10:27 +0900[diff] [blame]626# Include this also for config targets because some architectures need
627# cc-cross-prefix to determine CROSS_COMPILE.
Masahiro Yamada805b2e12021-02-28 15:10:28 +0900[diff] [blame]628ifdef need-compiler
Masahiro Yamada57fd2512021-02-28 15:10:27 +0900[diff] [blame]629include $(srctree)/scripts/Makefile.compiler
Masahiro Yamada805b2e12021-02-28 15:10:28 +0900[diff] [blame]630endif
Masahiro Yamada57fd2512021-02-28 15:10:27 +0900[diff] [blame]631
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]632ifdef config-build
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]633# ===========================================================================
634# *config targets only - make sure prerequisites are updated, and descend
635# in scripts/kconfig to make the *config target
636
637# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
638# KBUILD_DEFCONFIG may point out an alternative default configuration
639# used for 'make defconfig'
Masahiro Yamada3204a7f2021-02-28 15:10:26 +0900[diff] [blame]640include $(srctree)/arch/$(SRCARCH)/Makefile
Masahiro Yamada315bab42018-06-08 09:21:43 +0900[diff] [blame]641export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]642
Masahiro Yamada36de0772019-08-22 13:46:13 +0900[diff] [blame]643config: outputmakefile scripts_basic FORCE
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100[diff] [blame]644 $(Q)$(MAKE) $(build)=scripts/kconfig $@
645
Masahiro Yamada36de0772019-08-22 13:46:13 +0900[diff] [blame]646%config: outputmakefile scripts_basic FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]647 $(Q)$(MAKE) $(build)=scripts/kconfig $@
648
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]649else #!config-build
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]650# ===========================================================================
651# Build targets only - this includes vmlinux, arch specific targets, clean
652# targets and others. In general all targets except *config targets.
653
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]654# If building an external module we do not care about the all: rule
Masahiro Yamada121c2a12020-05-11 12:50:13 +0900[diff] [blame]655# but instead __all depend on modules
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]656PHONY += all
657ifeq ($(KBUILD_EXTMOD),)
Masahiro Yamada121c2a12020-05-11 12:50:13 +0900[diff] [blame]658__all: all
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]659else
Masahiro Yamada121c2a12020-05-11 12:50:13 +0900[diff] [blame]660__all: modules
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]661endif
662
663# Decide whether to build built-in, modular, or both.
664# Normally, just do built-in.
665
666KBUILD_MODULES :=
667KBUILD_BUILTIN := 1
668
669# If we have only "make modules", don't compile built-in objects.
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]670ifeq ($(MAKECMDGOALS),modules)
Masahiro Yamada4b50c8c2020-05-31 17:47:06 +0900[diff] [blame]671 KBUILD_BUILTIN :=
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]672endif
673
674# If we have "make <whatever> modules", compile modules
675# in addition to whatever we do anyway.
676# Just "make" or "make all" shall build modules as well
677
Nathan Huckleberry6ad7cbc2020-08-22 23:56:18 +0900[diff] [blame]678ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]679 KBUILD_MODULES := 1
680endif
681
682ifeq ($(MAKECMDGOALS),)
683 KBUILD_MODULES := 1
684endif
685
686export KBUILD_MODULES KBUILD_BUILTIN
687
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]688ifdef need-config
Masahiro Yamadad93a18f2019-04-27 12:33:36 +0900[diff] [blame]689include include/config/auto.conf
690endif
691
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]692ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]693# Objects we will link into vmlinux / subdirs we need to visit
Masahiro Yamadad92cc4d2021-05-12 16:57:25 +0900[diff] [blame]694core-y := init/ usr/ arch/$(SRCARCH)/
Masahiro Yamadaf96182e2019-01-11 18:52:00 +0900[diff] [blame]695drivers-y := drivers/ sound/
Masahiro Yamadad93a18f2019-04-27 12:33:36 +0900[diff] [blame]696drivers-$(CONFIG_SAMPLES) += samples/
Masahiro Yamada8b5f4eb2021-01-26 08:16:55 +0900[diff] [blame]697drivers-$(CONFIG_NET) += net/
698drivers-y += virt/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]699libs-y := lib/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]700endif # KBUILD_EXTMOD
701
Elliot Bermanee1b16e2021-04-07 08:03:11 -0700[diff] [blame]702ifndef KBUILD_MIXED_TREE
Masahiro Yamada315bab42018-06-08 09:21:43 +0900[diff] [blame]703# The all: target is the default when no target is given on the
704# command line.
705# This allow a user to issue only 'make' to build a kernel including modules
706# Defaults to vmlinux, but the arch makefile usually adds further targets
707all: vmlinux
Elliot Bermanee1b16e2021-04-07 08:03:11 -0700[diff] [blame]708endif
Masahiro Yamada315bab42018-06-08 09:21:43 +0900[diff] [blame]709
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]710CFLAGS_GCOV := -fprofile-arcs -ftest-coverage
711ifdef CONFIG_CC_IS_GCC
712CFLAGS_GCOV += -fno-tree-loop-im
713endif
Masahiro Yamada5aadfde2018-05-28 18:22:04 +0900[diff] [blame]714export CFLAGS_GCOV
Masahiro Yamada315bab42018-06-08 09:21:43 +0900[diff] [blame]715
Paulo Zanonib1f4ff72018-09-10 10:59:56 -0700[diff] [blame]716# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
717ifdef CONFIG_FUNCTION_TRACER
718 CC_FLAGS_FTRACE := -pg
719endif
720
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]721ifdef CONFIG_CC_IS_GCC
722RETPOLINE_CFLAGS := $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register)
Peter Zijlstrab4296a72021-11-19 17:50:25 +0100[diff] [blame]723RETPOLINE_CFLAGS += $(call cc-option,-mindirect-branch-cs-prefix)
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]724RETPOLINE_VDSO_CFLAGS := $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register)
725endif
726ifdef CONFIG_CC_IS_CLANG
727RETPOLINE_CFLAGS := -mretpoline-external-thunk
728RETPOLINE_VDSO_CFLAGS := -mretpoline
729endif
Peter Zijlstracc3011c2022-06-27 22:21:17 +0000[diff] [blame]730
731ifdef CONFIG_RETHUNK
732RETHUNK_CFLAGS := -mfunction-return=thunk-extern
733RETPOLINE_CFLAGS += $(RETHUNK_CFLAGS)
734endif
735
Masahiro Yamada669e06b2019-03-26 15:11:12 +0900[diff] [blame]736export RETPOLINE_CFLAGS
737export RETPOLINE_VDSO_CFLAGS
738
Masahiro Yamada3204a7f2021-02-28 15:10:26 +0900[diff] [blame]739include $(srctree)/arch/$(SRCARCH)/Makefile
Masahiro Yamada315bab42018-06-08 09:21:43 +0900[diff] [blame]740
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]741ifdef need-config
742ifdef may-sync-config
Masahiro Yamada315bab42018-06-08 09:21:43 +0900[diff] [blame]743# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
744# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
745# because some architectures define CROSS_COMPILE there.
Masahiro Yamadad2f8ae02019-05-12 11:13:48 +0900[diff] [blame]746include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]747
Masahiro Yamada05850712019-02-22 16:40:11 +0900[diff] [blame]748$(KCONFIG_CONFIG):
749 @echo >&2 '***'
750 @echo >&2 '*** Configuration file "$@" not found!'
751 @echo >&2 '***'
752 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
753 @echo >&2 '*** "make menuconfig" or "make xconfig").'
754 @echo >&2 '***'
755 @/bin/false
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]756
Ulf Magnusson61277982018-02-13 08:58:20 +0100[diff] [blame]757# The actual configuration files used during the build are stored in
758# include/generated/ and include/config/. Update them if .config is newer than
759# include/config/auto.conf (which mirrors .config).
Masahiro Yamada9390dff2019-02-22 16:40:10 +0900[diff] [blame]760#
761# This exploits the 'multi-target pattern rule' trick.
762# The syncconfig should be executed only once to make all the targets.
Masahiro Yamadaf463c352020-03-25 12:16:30 +0900[diff] [blame]763# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
Masahiro Yamadad952cfa2021-07-14 13:23:49 +0900[diff] [blame]764#
765# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
766# so you cannot notice that Kconfig is waiting for the user input.
Masahiro Yamada3044dd02020-05-01 15:01:41 +0900[diff] [blame]767%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
Masahiro Yamadad952cfa2021-07-14 13:23:49 +0900[diff] [blame]768 $(Q)$(kecho) " SYNC $@"
769 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]770else # !may-sync-config
Masahiro Yamadad7942412018-07-20 16:46:34 +0900[diff] [blame]771# External modules and some install targets need include/generated/autoconf.h
772# and include/config/auto.conf but do not care if they are up-to-date.
773# Use auto.conf to trigger the test
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200[diff] [blame]774PHONY += include/config/auto.conf
775
776include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200[diff] [blame]777 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200[diff] [blame]778 echo >&2; \
779 echo >&2 " ERROR: Kernel configuration is invalid."; \
780 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
781 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
782 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200[diff] [blame]783 /bin/false)
784
Masahiro Yamadad7942412018-07-20 16:46:34 +0900[diff] [blame]785endif # may-sync-config
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]786endif # need-config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]787
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]788KBUILD_CFLAGS += -fno-delete-null-pointer-checks
Linus Torvaldsef6000b2016-10-12 10:23:41 -0700[diff] [blame]789KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
Linus Torvaldsbd664f62017-07-12 19:25:47 -0700[diff] [blame]790KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
791KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
Linus Torvalds6f303d62019-05-01 11:05:41 -0700[diff] [blame]792KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200[diff] [blame]793
Masahiro Yamada15f5db62019-08-21 02:09:40 +0900[diff] [blame]794ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
795KBUILD_CFLAGS += -O2
796else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
797KBUILD_CFLAGS += -O3
798else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
799KBUILD_CFLAGS += -Os
Arnd Bergmann815eb712016-04-25 17:35:28 +0200[diff] [blame]800endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]801
Jiri Kosina69102312014-08-06 16:08:43 -0700[diff] [blame]802# Tell gcc to never replace conditional load with a non-conditional one
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]803ifdef CONFIG_CC_IS_GCC
804# gcc-10 renamed --param=allow-store-data-races=0 to
805# -fno-allow-store-data-races.
Jiri Kosina69102312014-08-06 16:08:43 -0700[diff] [blame]806KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
Sergei Trofimovichb11121392020-03-17 00:07:18 +0000[diff] [blame]807KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]808endif
Jiri Kosina69102312014-08-06 16:08:43 -0700[diff] [blame]809
Andi Kleen1873e872012-03-28 11:51:18 -0700[diff] [blame]810ifdef CONFIG_READABLE_ASM
811# Disable optimizations that make assembler listings hard to read.
812# reorder blocks reorders the control in the function
813# ipa clone creates specialized cloned functions
814# partial inlining inlines only parts of functions
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]815KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
Andi Kleen1873e872012-03-28 11:51:18 -0700[diff] [blame]816endif
817
Mike Frysinger08f67462009-06-04 16:29:08 -0700[diff] [blame]818ifneq ($(CONFIG_FRAME_WARN),0)
Masahiro Yamadaa83e4ca2020-02-17 00:19:36 +0900[diff] [blame]819KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100[diff] [blame]820endif
821
Masahiro Yamada893ab0042020-06-27 03:59:12 +0900[diff] [blame]822stackp-flags-y := -fno-stack-protector
Linus Torvalds050e9ba2018-06-14 12:21:18 +0900[diff] [blame]823stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
824stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
Masahiro Yamada2a61f472018-05-28 18:22:00 +0900[diff] [blame]825
826KBUILD_CFLAGS += $(stackp-flags-y)
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100[diff] [blame]827
Greg Kroah-Hartmana7ab4922021-12-08 13:45:05 +0100[diff] [blame]828KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
829KBUILD_CFLAGS += $(KBUILD_CFLAGS-y)
830
Masahiro Yamada076f4212018-10-30 22:26:33 +0900[diff] [blame]831ifdef CONFIG_CC_IS_CLANG
Masahiro Yamadaa1494302019-05-10 23:10:09 +0900[diff] [blame]832KBUILD_CPPFLAGS += -Qunused-arguments
Nathan Chancellor5c6ae0e2021-08-16 13:20:55 -0700[diff] [blame]833# The kernel builds with '-std=gnu89' so use of GNU extensions is acceptable.
Masahiro Yamadaa1494302019-05-10 23:10:09 +0900[diff] [blame]834KBUILD_CFLAGS += -Wno-gnu
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900[diff] [blame]835# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
836# source of a reference will be _MergedGlobals and not on of the whitelisted names.
837# See modpost pattern 2
Masahiro Yamadaa1494302019-05-10 23:10:09 +0900[diff] [blame]838KBUILD_CFLAGS += -mno-global-merge
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900[diff] [blame]839else
840
Nathan Chancellore2079e92019-08-26 17:41:55 -0700[diff] [blame]841# Warn about unmarked fall-throughs in switch statement.
842# Disabled for clang while comment to attribute conversion happens and
843# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
Linus Torvaldsd936eb22021-07-15 18:05:31 -0700[diff] [blame]844KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=5,)
Randy Dunlap49832c82021-09-07 15:42:02 -0700[diff] [blame]845# gcc inanely warns about local variables called 'main'
846KBUILD_CFLAGS += -Wno-main
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900[diff] [blame]847endif
848
Nathan Chancellor885480b2021-04-28 18:23:50 -0700[diff] [blame]849# These warnings generated too much noise in a regular build.
850# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
851KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Sodagudi Prasad0a5f4172018-02-06 15:46:51 -0800[diff] [blame]852KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
Nathan Chancellor6272cc32021-08-16 13:20:56 -0700[diff] [blame]853
Linus Torvaldsf7d63b52022-06-09 09:41:42 -0700[diff] [blame]854# These result in bogus false positives
855KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]857ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200[diff] [blame]858KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]859else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100[diff] [blame]860# Some targets (ARM with Thumb2, for example), can't be built with frame
861# pointers. For those, we don't have FUNCTION_TRACER automatically
862# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
863# incompatible with -fomit-frame-pointer with current GCC, so we don't use
864# -fomit-frame-pointer with FUNCTION_TRACER.
865ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200[diff] [blame]866KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]867endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100[diff] [blame]868endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]869
glider@google.comf0fe00d2020-06-16 10:34:35 +0200[diff] [blame]870# Initialize all stack variables with a 0xAA pattern.
871ifdef CONFIG_INIT_STACK_ALL_PATTERN
Kees Cook709a9722019-04-10 08:48:31 -0700[diff] [blame]872KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
873endif
874
glider@google.comf0fe00d2020-06-16 10:34:35 +0200[diff] [blame]875# Initialize all stack variables with a zero value.
876ifdef CONFIG_INIT_STACK_ALL_ZERO
glider@google.comf0fe00d2020-06-16 10:34:35 +0200[diff] [blame]877KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
Kees Cook74346262022-09-29 22:57:43 -0700[diff] [blame]878ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
879# https://github.com/llvm/llvm-project/issues/44842
glider@google.comf0fe00d2020-06-16 10:34:35 +0200[diff] [blame]880KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
881endif
Kees Cook09549382021-09-14 12:49:03 -0700[diff] [blame]882endif
glider@google.comf0fe00d2020-06-16 10:34:35 +0200[diff] [blame]883
Kees Cook39218ff2021-04-01 16:23:44 -0700[diff] [blame]884# While VLAs have been removed, GCC produces unreachable stack probes
885# for the randomize_kstack_offset feature. Disable it for all compilers.
886KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection)
887
Kees Cooka82adfd2021-04-12 19:56:54 -0700[diff] [blame]888# Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
889ifdef CONFIG_ZERO_CALL_USED_REGS
890KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr
891endif
892
Masahiro Yamada315da872021-02-03 16:52:39 +0900[diff] [blame]893DEBUG_CFLAGS :=
894
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]895ifdef CONFIG_DEBUG_INFO
Sedat Dilek695afd32020-08-16 14:32:44 +0200[diff] [blame]896
Andi Kleen866ced92014-07-30 20:50:18 +0200[diff] [blame]897ifdef CONFIG_DEBUG_INFO_SPLIT
Masahiro Yamada9d937442019-02-22 16:56:09 +0900[diff] [blame]898DEBUG_CFLAGS += -gsplit-dwarf
Andi Kleen866ced92014-07-30 20:50:18 +0200[diff] [blame]899else
Masahiro Yamada1e88e412019-02-10 15:51:00 +0900[diff] [blame]900DEBUG_CFLAGS += -g
Andi Kleen866ced92014-07-30 20:50:18 +0200[diff] [blame]901endif
Sedat Dilek695afd32020-08-16 14:32:44 +0200[diff] [blame]902
Nick Desaulniers0ee2f052022-10-24 13:34:14 -0700[diff] [blame]903ifdef CONFIG_AS_IS_LLVM
904KBUILD_AFLAGS += -g
905else
Behan Webster22883282014-02-14 15:19:17 -0800[diff] [blame]906KBUILD_AFLAGS += -Wa,-gdwarf-2
Nick Desaulniers62015d12020-11-09 10:35:28 -0800[diff] [blame]907endif
Sedat Dilek695afd32020-08-16 14:32:44 +0200[diff] [blame]908
Nick Desaulniersa66049e2021-02-05 12:22:19 -0800[diff] [blame]909ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
910dwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
Nick Desaulniers98cd6f52021-02-05 12:22:20 -0800[diff] [blame]911dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
Nick Desaulniersa66049e2021-02-05 12:22:19 -0800[diff] [blame]912DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y)
Nick Desaulniers10a72c62023-03-15 14:40:59 -0700[diff] [blame]913KBUILD_AFLAGS += -gdwarf-$(dwarf-version-y)
Andi Kleenbfaf2dd2014-07-30 20:50:19 +0200[diff] [blame]914endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]915
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200[diff] [blame]916ifdef CONFIG_DEBUG_INFO_REDUCED
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]917DEBUG_CFLAGS += -fno-var-tracking
918ifdef CONFIG_CC_IS_GCC
919DEBUG_CFLAGS += -femit-struct-debug-baseonly
920endif
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200[diff] [blame]921endif
922
Nick Desaulniers10e68b022020-05-26 10:18:29 -0700[diff] [blame]923ifdef CONFIG_DEBUG_INFO_COMPRESSED
924DEBUG_CFLAGS += -gz=zlib
Arvind Sankar7b169942020-06-11 18:03:39 -0400[diff] [blame]925KBUILD_AFLAGS += -gz=zlib
Nick Desaulniers10e68b022020-05-26 10:18:29 -0700[diff] [blame]926KBUILD_LDFLAGS += --compress-debug-sections=zlib
927endif
928
Sedat Dilek695afd32020-08-16 14:32:44 +0200[diff] [blame]929endif # CONFIG_DEBUG_INFO
930
Masahiro Yamada1e88e412019-02-10 15:51:00 +0900[diff] [blame]931KBUILD_CFLAGS += $(DEBUG_CFLAGS)
932export DEBUG_CFLAGS
933
Steven Rostedt606576c2008-10-06 19:06:12 -0400[diff] [blame]934ifdef CONFIG_FUNCTION_TRACER
Sami Tolvanen3b15cdc12020-12-11 10:46:18 -0800[diff] [blame]935ifdef CONFIG_FTRACE_MCOUNT_USE_CC
936 CC_FLAGS_FTRACE += -mrecord-mcount
Vasily Gorbik2f4df002018-08-06 15:17:46 +0200[diff] [blame]937 ifdef CONFIG_HAVE_NOP_MCOUNT
938 ifeq ($(call cc-option-yn, -mnop-mcount),y)
939 CC_FLAGS_FTRACE += -mnop-mcount
940 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
941 endif
942 endif
Steven Rostedta2546fa2011-02-09 13:15:59 -0500[diff] [blame]943endif
Sami Tolvanen22c85422020-09-25 16:43:53 -0700[diff] [blame]944ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
945 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
946endif
Sami Tolvanen3b15cdc12020-12-11 10:46:18 -0800[diff] [blame]947ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
948 ifdef CONFIG_HAVE_C_RECORDMCOUNT
949 BUILD_C_RECORDMCOUNT := y
950 export BUILD_C_RECORDMCOUNT
951 endif
952endif
Steven Rostedta2546fa2011-02-09 13:15:59 -0500[diff] [blame]953ifdef CONFIG_HAVE_FENTRY
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]954 # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
Vasily Gorbikf28bc3c2018-08-06 15:17:42 +0200[diff] [blame]955 ifeq ($(call cc-option-yn, -mfentry),y)
956 CC_FLAGS_FTRACE += -mfentry
957 CC_FLAGS_USING += -DCC_USING_FENTRY
958 endif
Steven Rostedta2546fa2011-02-09 13:15:59 -0500[diff] [blame]959endif
Vasily Gorbikf28bc3c2018-08-06 15:17:42 +0200[diff] [blame]960export CC_FLAGS_FTRACE
961KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
962KBUILD_AFLAGS += $(CC_FLAGS_USING)
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200[diff] [blame]963endif
964
Sam Ravnborg91341d42008-01-21 21:31:44 +0100[diff] [blame]965# We trigger additional mismatches with less inlining
966ifdef CONFIG_DEBUG_SECTION_MISMATCH
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]967KBUILD_CFLAGS += -fno-inline-functions-called-once
Sam Ravnborg91341d42008-01-21 21:31:44 +0100[diff] [blame]968endif
969
Masahiro Yamada90ad4052017-04-14 15:17:26 +0900[diff] [blame]970ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
Masahiro Yamadae85d1d62018-08-22 22:51:09 +0900[diff] [blame]971KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
972LDFLAGS_vmlinux += --gc-sections
Masahiro Yamada90ad4052017-04-14 15:17:26 +0900[diff] [blame]973endif
974
Sami Tolvanend08b9f02020-04-27 09:00:07 -0700[diff] [blame]975ifdef CONFIG_SHADOW_CALL_STACK
976CC_FLAGS_SCS := -fsanitize=shadow-call-stack
977KBUILD_CFLAGS += $(CC_FLAGS_SCS)
978export CC_FLAGS_SCS
979endif
980
Sami Tolvanendc5723b2020-12-11 10:46:19 -0800[diff] [blame]981ifdef CONFIG_LTO_CLANG
982ifdef CONFIG_LTO_CLANG_THIN
Alexander Lobakin2b868952021-01-21 18:45:55 +0000[diff] [blame]983CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit
Masahiro Yamada7f691802021-03-31 22:38:06 +0900[diff] [blame]984KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
Sami Tolvanendc5723b2020-12-11 10:46:19 -0800[diff] [blame]985else
Alexander Lobakin2b868952021-01-21 18:45:55 +0000[diff] [blame]986CC_FLAGS_LTO := -flto
Sami Tolvanendc5723b2020-12-11 10:46:19 -0800[diff] [blame]987endif
Giuliano Procida5e939392021-03-12 09:19:08 +0000[diff] [blame]988
989ifeq ($(SRCARCH),x86)
990# Workaround for compiler / linker bug
Sami Tolvanendc5723b2020-12-11 10:46:19 -0800[diff] [blame]991CC_FLAGS_LTO += -fvisibility=hidden
Giuliano Procida5e939392021-03-12 09:19:08 +0000[diff] [blame]992else
993CC_FLAGS_LTO += -fvisibility=default
994endif
Sami Tolvanen22d429e2020-12-11 10:46:21 -0800[diff] [blame]995
996# Limit inlining across translation units to reduce binary size
997KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
Nick Desaulniers24845dc2021-03-11 17:09:41 -0800[diff] [blame]998
Tor Vic02365262021-06-13 13:07:49 +0000[diff] [blame]999# Check for frame size exceeding threshold during prolog/epilog insertion
1000# when using lld < 13.0.0.
Nick Desaulniers24845dc2021-03-11 17:09:41 -0800[diff] [blame]1001ifneq ($(CONFIG_FRAME_WARN),0)
Tor Vic02365262021-06-13 13:07:49 +0000[diff] [blame]1002ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
Nick Desaulniers24845dc2021-03-11 17:09:41 -0800[diff] [blame]1003KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
1004endif
Sami Tolvanendc5723b2020-12-11 10:46:19 -0800[diff] [blame]1005endif
Tor Vic02365262021-06-13 13:07:49 +0000[diff] [blame]1006endif
Sami Tolvanendc5723b2020-12-11 10:46:19 -0800[diff] [blame]1007
1008ifdef CONFIG_LTO
Sami Tolvanen5e953252021-02-23 13:59:52 -0800[diff] [blame]1009KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)
1010KBUILD_AFLAGS += -fno-lto
Sami Tolvanendc5723b2020-12-11 10:46:19 -0800[diff] [blame]1011export CC_FLAGS_LTO
1012endif
1013
Sami Tolvanencf68fff2021-04-08 11:28:26 -0700[diff] [blame]1014ifdef CONFIG_CFI_CLANG
1015CC_FLAGS_CFI := -fsanitize=cfi \
1016 -fsanitize-cfi-cross-dso \
1017 -fno-sanitize-cfi-canonical-jump-tables \
1018 -fno-sanitize-trap=cfi \
1019 -fno-sanitize-blacklist
1020
1021ifdef CONFIG_CFI_PERMISSIVE
1022CC_FLAGS_CFI += -fsanitize-recover=cfi
1023endif
1024
1025# If LTO flags are filtered out, we must also filter out CFI.
1026CC_FLAGS_LTO += $(CC_FLAGS_CFI)
1027KBUILD_CFLAGS += $(CC_FLAGS_CFI)
1028export CC_FLAGS_CFI
1029endif
1030
Feng Tangcf536e12021-05-06 15:34:59 +0800[diff] [blame]1031ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B
1032KBUILD_CFLAGS += -falign-functions=64
Feng Tang09c60542020-08-11 18:34:13 -0700[diff] [blame]1033endif
1034
Sam Ravnborge8e69932005-04-30 16:51:42 -0700[diff] [blame]1035# arch Makefile may override CC so keep this after arch Makefile is included
Masahiro Yamadae08d6de2018-05-28 18:21:38 +0900[diff] [blame]1036NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700[diff] [blame]1037
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1038# warn about C99 declaration after statement
Masahiro Yamadaa33e7ae2018-10-01 18:44:37 +0900[diff] [blame]1039KBUILD_CFLAGS += -Wdeclaration-after-statement
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1040
Kees Cook0bb95f82018-06-25 15:59:34 -0700[diff] [blame]1041# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
Masahiro Yamada8289f912019-05-09 15:45:49 +0900[diff] [blame]1042KBUILD_CFLAGS += -Wvla
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1043
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200[diff] [blame]1044# disable pointer signed / unsigned warnings in gcc 4.0
Masahiro Yamadafb073a4b2018-10-01 18:44:36 +0900[diff] [blame]1045KBUILD_CFLAGS += -Wno-pointer-sign
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1046
Stephen Rothwell217c3e02018-08-31 07:47:28 +1000[diff] [blame]1047# disable stringop warnings in gcc 8+
1048KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
1049
Linus Torvalds5c45de22020-05-09 14:30:29 -0700[diff] [blame]1050# We'll want to enable this eventually, but it's not going away for 5.7 at least
1051KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]1052KBUILD_CFLAGS += -Wno-array-bounds
Linus Torvalds5a760212020-05-09 15:40:52 -0700[diff] [blame]1053KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
Linus Torvalds5c45de22020-05-09 14:30:29 -0700[diff] [blame]1054
Linus Torvaldsadc71922020-05-09 15:45:21 -0700[diff] [blame]1055# Another good warning that we'll want to enable eventually
1056KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
1057
Linus Torvalds78a52552020-05-09 13:57:10 -0700[diff] [blame]1058# Enabled with W=2, disabled by default as noisy
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]1059ifdef CONFIG_CC_IS_GCC
1060KBUILD_CFLAGS += -Wno-maybe-uninitialized
1061endif
Linus Torvalds78a52552020-05-09 13:57:10 -0700[diff] [blame]1062
Kees Cookff418042021-11-05 13:36:19 -0700[diff] [blame]1063ifdef CONFIG_CC_IS_GCC
1064# The allocators already balk at large sizes, so silence the compiler
1065# warnings for bounds checks involving those possible values. While
1066# -Wno-alloc-size-larger-than would normally be used here, earlier versions
1067# of gcc (<9.1) weirdly don't handle the option correctly when _other_
1068# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX
1069# doesn't work (as it is documented to), silently resolving to "0" prior to
1070# version 9.1 (and producing an error more recently). Numeric values larger
1071# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently
1072# ignored, continuing to default to PTRDIFF_MAX. So, left with no other
1073# choice, we must perform a versioned check to disable this warning.
1074# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
1075KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than)
1076endif
1077
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400[diff] [blame]1078# disable invalid "can't wrap" optimizations for signed / pointers
Masahiro Yamada8b42cf22020-09-10 22:51:17 +0900[diff] [blame]1079KBUILD_CFLAGS += -fno-strict-overflow
Linus Torvaldsd0115552009-03-19 15:53:19 -0700[diff] [blame]1080
Linus Torvalds3ce120b2017-12-29 17:34:43 -0800[diff] [blame]1081# Make sure -fstack-check isn't enabled (like gentoo apparently did)
Masahiro Yamada7d4eb0d2020-09-10 22:51:19 +0900[diff] [blame]1082KBUILD_CFLAGS += -fno-stack-check
Linus Torvalds3ce120b2017-12-29 17:34:43 -0800[diff] [blame]1083
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700[diff] [blame]1084# conserve stack if available
Nick Desaulniers7d73c3e2021-08-16 13:25:01 -0700[diff] [blame]1085ifdef CONFIG_CC_IS_GCC
1086KBUILD_CFLAGS += -fconserve-stack
1087endif
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700[diff] [blame]1088
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800[diff] [blame]1089# Prohibit date/time macros, which would make the build non-deterministic
Masahiro Yamada87de84c2020-09-10 22:51:20 +0900[diff] [blame]1090KBUILD_CFLAGS += -Werror=date-time
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800[diff] [blame]1091
Daniel Wagnerea8daa72016-03-08 09:29:09 +0100[diff] [blame]1092# enforce correct pointer usage
1093KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
1094
Kees Cookc834f0e2017-03-20 17:14:11 -0700[diff] [blame]1095# Require designated initializers for all marked structures
1096KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
1097
Masahiro Yamadaa73619a2018-03-30 13:15:26 +0900[diff] [blame]1098# change __FILE__ to the relative path from the srctree
Denys Zagoruia716bd72020-11-02 04:08:53 -0800[diff] [blame]1099KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
Masahiro Yamadaa73619a2018-03-30 13:15:26 +0900[diff] [blame]1100
Masahiro Yamadae0fe0bb2020-08-02 00:00:49 +0900[diff] [blame]1101# include additional Makefiles when needed
1102include-y := scripts/Makefile.extrawarn
1103include-$(CONFIG_KASAN) += scripts/Makefile.kasan
1104include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
1105include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
1106include-$(CONFIG_KCOV) += scripts/Makefile.kcov
1107include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
1108
1109include $(addprefix $(srctree)/, $(include-y))
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900[diff] [blame]1110
Masahiro Yamada132305b2020-08-02 00:00:50 +0900[diff] [blame]1111# scripts/Makefile.gcc-plugins is intentionally included last.
1112# Do not add $(call cc-option,...) below this line. When you build the kernel
1113# from the clean source tree, the GCC plugins do not exist at this point.
Jason Baronbf5438fc2010-09-17 11:09:00 -0400[diff] [blame]1114
Masahiro Yamada8cc7af72019-08-21 02:09:41 +0900[diff] [blame]1115# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1116KBUILD_CPPFLAGS += $(KCPPFLAGS)
1117KBUILD_AFLAGS += $(KAFLAGS)
1118KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200[diff] [blame]1119
Bill Wendlinga9684332020-09-22 16:21:40 -0700[diff] [blame]1120KBUILD_LDFLAGS_MODULE += --build-id=sha1
1121LDFLAGS_vmlinux += --build-id=sha1
Roland McGrath18991192007-07-19 01:48:40 -0700[diff] [blame]1122
Nick Desaulniers4c7ee822022-08-10 15:24:40 -0700[diff] [blame]1123KBUILD_LDFLAGS += -z noexecstack
1124ifeq ($(CONFIG_LD_IS_BFD),y)
1125KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
1126endif
1127
David Howells5d7d18f2009-03-04 11:59:07 -0800[diff] [blame]1128ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200[diff] [blame]1129LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800[diff] [blame]1130endif
1131
Peter Collingbourne5cf896fb62019-07-31 18:18:42 -0700[diff] [blame]1132ifeq ($(CONFIG_RELR),y)
Nick Desaulniersefe84712021-03-18 17:07:06 -0700[diff] [blame]1133LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags
Peter Collingbourne5cf896fb62019-07-31 18:18:42 -0700[diff] [blame]1134endif
1135
Nathan Chancellor59612b22020-11-19 13:46:56 -0700[diff] [blame]1136# We never want expected sections to be placed heuristically by the
1137# linker. All sections should be explicitly named in the linker script.
1138ifdef CONFIG_LD_ORPHAN_WARN
1139LDFLAGS_vmlinux += --orphan-handling=warn
1140endif
1141
Masahiro Yamada7f3a59d2020-04-29 12:45:14 +0900[diff] [blame]1142# Align the bit size of userspace programs with the kernel
Masahiro Yamada7f58b482020-07-01 00:06:25 +0900[diff] [blame]1143KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1144KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
Masahiro Yamada7f3a59d2020-04-29 12:45:14 +0900[diff] [blame]1145
Luc Van Oostenryck80591e62019-11-09 13:12:16 +0100[diff] [blame]1146# make the checker run with the right architecture
1147CHECKFLAGS += --arch=$(ARCH)
1148
Luc Van Oostenryck145167652018-05-28 20:27:35 +0200[diff] [blame]1149# insure the checker run with the right endianness
1150CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1151
Luc Van Oostenryck1f2f01b2018-05-30 22:48:38 +0200[diff] [blame]1152# the checker needs the correct machine size
1153CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1154
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1155# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200[diff] [blame]1156# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1157# set in the environment
1158# Also any assignments in arch/$(ARCH)/Makefile take precedence over
1159# this default value
1160export KBUILD_IMAGE ?= vmlinux
1161
1162#
1163# INSTALL_PATH specifies where to place the updated kernel and system map
1164# images. Default is /boot, but you can set it to other values
1165export INSTALL_PATH ?= /boot
1166
1167#
Jason Cooperf4d4ffc2013-12-01 23:56:28 +0000[diff] [blame]1168# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1169# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1170# an argument if needed. Otherwise it defaults to the kernel install path
1171#
1172export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1173
1174#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1175# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1176# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200[diff] [blame]1177# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1178#
1179
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100[diff] [blame]1180MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1181export MODLIB
1182
Masahiro Yamadae00d8882019-01-15 16:19:00 +0900[diff] [blame]1183PHONY += prepare0
Rusty Russelle2a666d2012-10-19 11:53:15 +1030[diff] [blame]1184
Masahiro Yamadaccae4cf2021-03-31 22:38:07 +0900[diff] [blame]1185export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
Masahiro Yamada7f691802021-03-31 22:38:06 +0900[diff] [blame]1186export MODORDER := $(extmod_prefix)modules.order
1187export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
Masahiro Yamada47801c92019-08-02 19:23:58 +0900[diff] [blame]1188
Elliot Berman280812b2020-07-24 18:12:48 -0700[diff] [blame]1189# ---------------------------------------------------------------------------
1190# Kernel headers
1191
1192PHONY += headers
1193
1194#Default location for installed headers
1195ifeq ($(KBUILD_EXTMOD),)
1196PHONY += archheaders archscripts
1197hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1198headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1199else
1200hdr-prefix = $(KBUILD_EXTMOD)/
1201hdr-inst := -f $(srctree)/scripts/Makefile.headersinst dst=$(KBUILD_EXTMOD)/usr/include objtree=$(objtree)/$(KBUILD_EXTMOD) obj
1202endif
1203
1204export INSTALL_HDR_PATH = $(objtree)/$(hdr-prefix)usr
1205
1206quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1207 cmd_headers_install = \
1208 mkdir -p $(INSTALL_HDR_PATH); \
1209 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
Tai Kuo18bfcc12021-03-04 21:37:48 +0800[diff] [blame]1210 $(hdr-prefix)usr/include $(INSTALL_HDR_PATH);
Elliot Berman280812b2020-07-24 18:12:48 -0700[diff] [blame]1211
1212PHONY += headers_install
1213headers_install: headers
1214 $(call cmd,headers_install)
1215
1216headers:
1217ifeq ($(KBUILD_EXTMOD),)
Greg Kroah-Hartman35fc9022022-09-23 14:45:07 +0200[diff] [blame]1218 $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
Elliot Berman280812b2020-07-24 18:12:48 -0700[diff] [blame]1219endif
1220 $(Q)$(MAKE) $(hdr-inst)=$(hdr-prefix)include/uapi
1221 $(Q)$(MAKE) $(hdr-inst)=$(hdr-prefix)arch/$(SRCARCH)/include/uapi
1222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1223ifeq ($(KBUILD_EXTMOD),)
Masahiro Yamadad9e1e5d2021-09-27 23:00:00 +0900[diff] [blame]1224core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/
1225core-$(CONFIG_BLOCK) += block/
Jens Axboef435c662022-05-23 17:05:03 -0600[diff] [blame]1226core-$(CONFIG_IO_URING) += io_uring/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1227
Masahiro Yamada23febe32020-06-01 14:56:57 +0900[diff] [blame]1228vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1229 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
Masahiro Yamada95fb6312020-06-01 14:56:58 +0900[diff] [blame]1230 $(libs-y) $(libs-m)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1231
Masahiro Yamada1eaca4b2019-04-27 12:33:37 +0900[diff] [blame]1232vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
Masahiro Yamada23febe32020-06-01 14:56:57 +0900[diff] [blame]1233 $(patsubst %/,%,$(filter %/, $(core-) \
Masahiro Yamada95fb6312020-06-01 14:56:58 +0900[diff] [blame]1234 $(drivers-) $(libs-))))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1235
Masahiro Yamadac99f3912019-08-11 00:53:04 +0900[diff] [blame]1236build-dirs := $(vmlinux-dirs)
Masahiro Yamada76cd3062019-08-11 00:53:05 +0900[diff] [blame]1237clean-dirs := $(vmlinux-alldirs)
Masahiro Yamadac99f3912019-08-11 00:53:04 +0900[diff] [blame]1238
Masahiro Yamadaa2cafe22022-08-14 08:09:28 +0900[diff] [blame]1239subdir-modorder := $(addsuffix /modules.order, $(build-dirs))
1240
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200[diff] [blame]1241# Externally visible symbols (used by link-vmlinux.sh)
Masahiro Yamadaf0d50ca2020-06-01 14:56:59 +0900[diff] [blame]1242KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1243KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1244ifdef CONFIG_MODULES
1245KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1246KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1247else
1248KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1249endif
1250KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1251
1252export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
Sam Ravnborg95698572012-05-05 10:18:40 +0200[diff] [blame]1253export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Masahiro Yamada85f0ae72019-09-21 22:18:46 +0900[diff] [blame]1254# used by scripts/Makefile.package
Masahiro Yamada233c7412019-05-16 01:18:54 +0900[diff] [blame]1255export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1256
Masahiro Yamadad151e972019-01-17 09:10:04 +0900[diff] [blame]1257vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1258
Masahiro Yamada3fdc7d32018-03-16 16:37:15 +0900[diff] [blame]1259# Recurse until adjust_autoksyms.sh is satisfied
1260PHONY += autoksyms_recursive
Nicolas Pitre2441e782016-04-22 15:25:00 -0400[diff] [blame]1261ifdef CONFIG_TRIM_UNUSED_KSYMS
Masahiro Yamada1f50b802018-03-16 16:37:13 +0900[diff] [blame]1262# For the kernel to actually contain only the needed exported symbols,
1263# we have to build modules as well to determine what those symbols are.
1264# (this can be evaluated only once include/config/auto.conf has been included)
Masahiro Yamadafb2d99b2020-05-31 19:11:39 +0900[diff] [blame]1265KBUILD_MODULES := 1
1266
1267autoksyms_recursive: descend modules.order
1268 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
Masahiro Yamada17aa69b2022-06-24 04:11:47 +0900[diff] [blame]1269 "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive"
Masahiro Yamada1f50b802018-03-16 16:37:13 +0900[diff] [blame]1270endif
1271
Masahiro Yamada07a422b2018-03-16 16:37:12 +0900[diff] [blame]1272autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1273
Quentin Perretada445e2020-02-18 09:41:39 +0000[diff] [blame]1274quiet_cmd_autoksyms_h = GEN $@
Quentin Perretfe408222020-03-03 15:44:50 +0000[diff] [blame]1275 cmd_autoksyms_h = mkdir -p $(dir $@); \
1276 $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
Quentin Perretada445e2020-02-18 09:41:39 +0000[diff] [blame]1277
Masahiro Yamada07a422b2018-03-16 16:37:12 +0900[diff] [blame]1278$(autoksyms_h):
Quentin Perretada445e2020-02-18 09:41:39 +0000[diff] [blame]1279 $(call cmd,autoksyms_h)
Nicolas Pitre23121ca2016-01-26 21:50:18 -0500[diff] [blame]1280
Nicholas Pigginfbe6e372016-08-24 22:29:21 +1000[diff] [blame]1281ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1282
1283# Final link of vmlinux with optional arch pass after final link
Cao jin312a3d02017-08-02 10:31:06 +0800[diff] [blame]1284cmd_link-vmlinux = \
Masahiro Yamada3ec8a5b2020-07-02 04:29:36 +0900[diff] [blame]1285 $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
Nicholas Pigginfbe6e372016-08-24 22:29:21 +1000[diff] [blame]1286 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
Nicolas Pitre2441e782016-04-22 15:25:00 -0400[diff] [blame]1287
Elliot Bermanee1b16e2021-04-07 08:03:11 -0700[diff] [blame]1288ifndef KBUILD_MIXED_TREE
Masahiro Yamada3fdc7d32018-03-16 16:37:15 +0900[diff] [blame]1289vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
Rasmus Villemoes0b956e22021-03-05 11:02:12 +0100[diff] [blame]1290 +$(call if_changed_dep,link-vmlinux)
Elliot Bermanee1b16e2021-04-07 08:03:11 -0700[diff] [blame]1291endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200[diff] [blame]1292
Masahiro Yamada392885e2018-11-30 10:05:22 +0900[diff] [blame]1293targets := vmlinux
1294
Masahiro Yamada38385f82014-04-28 16:26:18 +0900[diff] [blame]1295# The actual objects are generated when descending,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1296# make sure no implicit rule kicks in
Masahiro Yamadab2c88552020-06-01 14:57:00 +0900[diff] [blame]1297$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1298
Masahiro Yamadaba97df42019-01-03 10:16:54 +0900[diff] [blame]1299filechk_kernel.release = \
Will McVickerf0bec7a2020-07-09 15:33:45 -0700[diff] [blame]1300 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion \
Philip Chen67510f52023-04-07 10:37:25 -0700[diff] [blame]1301 --save-tag $(srctree) $(BRANCH) $(KMI_GENERATION))"
Michal Marek0d0e7712013-07-11 15:34:51 +0200[diff] [blame]1302
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +0200[diff] [blame]1303# Store (new) KERNELRELEASE string in include/config/kernel.release
Masahiro Yamada24512792019-04-07 19:03:18 +0900[diff] [blame]1304include/config/kernel.release: FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +0200[diff] [blame]1305 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100[diff] [blame]1306
Masahiro Yamadad8821622018-03-16 16:37:11 +0900[diff] [blame]1307# Additional helpers built in scripts/
1308# Carefully list dependencies so we do not try to build scripts twice
1309# in parallel
1310PHONY += scripts
Masahiro Yamada60df1ae2018-11-29 12:13:24 +0900[diff] [blame]1311scripts: scripts_basic scripts_dtc
Masahiro Yamadad8821622018-03-16 16:37:11 +0900[diff] [blame]1312 $(Q)$(MAKE) $(build)=$(@)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100[diff] [blame]1313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1314# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200[diff] [blame]1315# or the modules are listed in "prepare".
1316# A multi level approach is used. prepareN is processed before prepareN-1.
1317# archprepare is used in arch Makefiles and when processed asm symlink,
1318# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1319
Masahiro Yamadaa5139fb2019-08-22 13:46:12 +0900[diff] [blame]1320PHONY += prepare archprepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200[diff] [blame]1321
Masahiro Yamada36de0772019-08-22 13:46:13 +0900[diff] [blame]1322archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
Masahiro Yamada3044dd02020-05-01 15:01:41 +0900[diff] [blame]1323 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
Masahiro Yamada1476fee52021-04-25 16:07:12 +0900[diff] [blame]1324 include/generated/autoconf.h remove-stale-files
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200[diff] [blame]1325
Masahiro Yamada65bba042018-11-29 11:58:50 +0900[diff] [blame]1326prepare0: archprepare
Masahiro Yamada60df1ae2018-11-29 12:13:24 +0900[diff] [blame]1327 $(Q)$(MAKE) $(build)=scripts/mod
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200[diff] [blame]1328 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200[diff] [blame]1329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1330# All the preparing..
Lee Jonesc4011cf2021-08-11 15:50:50 +0100[diff] [blame]1331prepare: prepare0
Josh Poimboeufb9ab5eb2016-02-28 22:22:42 -0600[diff] [blame]1332
Masahiro Yamada1476fee52021-04-25 16:07:12 +0900[diff] [blame]1333PHONY += remove-stale-files
1334remove-stale-files:
1335 $(Q)$(srctree)/scripts/remove-stale-files
1336
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]1337# Support for using generic headers in asm-generic
Masahiro Yamada7d0e5c22018-12-05 20:28:04 +0900[diff] [blame]1338asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1339
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]1340PHONY += asm-generic uapi-asm-generic
1341asm-generic: uapi-asm-generic
Masahiro Yamada037fc332019-03-17 11:01:09 +0900[diff] [blame]1342 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1343 generic=include/asm-generic
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]1344uapi-asm-generic:
Masahiro Yamada037fc332019-03-17 11:01:09 +0900[diff] [blame]1345 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1346 generic=include/uapi/asm-generic
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900[diff] [blame]1347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1348# Generate some files
1349# ---------------------------------------------------------------------------
1350
1351# KERNELRELEASE can change from a few different places, meaning version.h
1352# needs to be updated, so this check is forced on all builds
1353
1354uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200[diff] [blame]1355define filechk_utsrelease.h
Alistair Delva85121792021-07-20 12:02:28 -0700[diff] [blame]1356 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1357 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1358 exit 1; \
1359 fi; \
1360 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1361endef
1362
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200[diff] [blame]1363define filechk_version.h
Sasha Levin9b82f132021-02-05 22:50:32 -0500[diff] [blame]1364 if [ $(SUBLEVEL) -gt 255 ]; then \
1365 echo \#define LINUX_VERSION_CODE $(shell \
Masahiro Yamada207da4c2021-02-27 23:20:23 +0900[diff] [blame]1366 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
Sasha Levin9b82f132021-02-05 22:50:32 -0500[diff] [blame]1367 else \
1368 echo \#define LINUX_VERSION_CODE $(shell \
Masahiro Yamada207da4c2021-02-27 23:20:23 +0900[diff] [blame]1369 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
Sasha Levin9b82f132021-02-05 22:50:32 -0500[diff] [blame]1370 fi; \
1371 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
Sasha Levin88a68672021-02-12 11:29:24 -0500[diff] [blame]1372 ((c) > 255 ? 255 : (c)))'; \
1373 echo \#define LINUX_VERSION_MAJOR $(VERSION); \
1374 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
1375 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200[diff] [blame]1376endef
1377
Masahiro Yamada207da4c2021-02-27 23:20:23 +0900[diff] [blame]1378$(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1379$(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
Masahiro Yamada43fee2b2018-07-25 14:16:11 +0900[diff] [blame]1380$(version_h): FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1381 $(call filechk,version.h)
1382
Sam Ravnborg273b2812009-10-18 00:52:28 +0200[diff] [blame]1383include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200[diff] [blame]1384 $(call filechk,utsrelease.h)
1385
Vegard Nossum179efcb2008-12-16 12:33:43 +0100[diff] [blame]1386PHONY += headerdep
1387headerdep:
Peter Foley9663d982011-04-26 17:17:11 -0400[diff] [blame]1388 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1389 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +0100[diff] [blame]1390
Masahiro Yamada7ecaf062019-11-07 16:14:41 +0900[diff] [blame]1391# Deprecated. It is no-op now.
David Woodhouse68475352006-06-18 12:02:10 +0100[diff] [blame]1392PHONY += headers_check
Masahiro Yamada7ecaf062019-11-07 16:14:41 +0900[diff] [blame]1393headers_check:
Masahiro Yamada609bbb42021-03-02 23:26:14 +0900[diff] [blame]1394 @echo >&2 "=================== WARNING ==================="
1395 @echo >&2 "Since Linux 5.5, 'make headers_check' is no-op,"
1396 @echo >&2 "and will be removed after Linux 5.15 release."
1397 @echo >&2 "Please remove headers_check from your scripts."
1398 @echo >&2 "==============================================="
David Woodhouse68475352006-06-18 12:02:10 +0100[diff] [blame]1399
Masahiro Yamadae949f4c2019-06-04 19:13:59 +0900[diff] [blame]1400ifdef CONFIG_HEADERS_INSTALL
Masahiro Yamada59b2bd02019-06-04 19:14:02 +0900[diff] [blame]1401prepare: headers
Masahiro Yamadae949f4c2019-06-04 19:13:59 +0900[diff] [blame]1402endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1403
Masahiro Yamadabdd77142019-06-04 19:14:01 +0900[diff] [blame]1404PHONY += scripts_unifdef
1405scripts_unifdef: scripts_basic
1406 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1407
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1408# ---------------------------------------------------------------------------
Masahiro Yamada14ccc632021-07-29 09:12:54 +0900[diff] [blame]1409# Install
1410
1411# Many distributions have the custom install script, /sbin/installkernel.
1412# If DKMS is installed, 'make install' will eventually recuses back
1413# to the this Makefile to build and install external modules.
1414# Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
1415
1416install: sub_make_done :=
1417
1418# ---------------------------------------------------------------------------
Masahiro Yamada1bb0b182021-05-12 15:52:00 +0900[diff] [blame]1419# Tools
1420
Lee Jonesc4011cf2021-08-11 15:50:50 +0100[diff] [blame]1421ifdef CONFIG_STACK_VALIDATION
1422prepare: tools/objtool
1423endif
1424
1425ifdef CONFIG_BPF
1426ifdef CONFIG_DEBUG_INFO_BTF
1427prepare: tools/bpf/resolve_btfids
1428endif
1429endif
1430
1431PHONY += resolve_btfids_clean
1432
1433resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
1434
1435# tools/bpf/resolve_btfids directory might not exist
1436# in output directory, skip its clean in that case
1437resolve_btfids_clean:
1438ifneq ($(wildcard $(resolve_btfids_O)),)
1439 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
1440endif
1441
Masahiro Yamada1bb0b182021-05-12 15:52:00 +0900[diff] [blame]1442# Clear a bunch of variables before executing the submake
1443ifeq ($(quiet),silent_)
1444tools_silent=s
1445endif
1446
1447tools/: FORCE
1448 $(Q)mkdir -p $(objtree)/tools
1449 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1450
1451tools/%: FORCE
1452 $(Q)mkdir -p $(objtree)/tools
1453 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1454
1455# ---------------------------------------------------------------------------
Shuah Khan5a5da782014-08-07 13:07:46 -0600[diff] [blame]1456# Kernel selftest
1457
1458PHONY += kselftest
1459kselftest:
Shuah Khan2bc84522017-09-06 16:44:35 -0600[diff] [blame]1460 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
Shuah Khan5a5da782014-08-07 13:07:46 -0600[diff] [blame]1461
Shuah Khan17eac6c2019-09-26 16:40:14 -0600[diff] [blame]1462kselftest-%: FORCE
1463 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
Wang Longdcb825a2015-10-08 02:41:18 +0000[diff] [blame]1464
Bamvor Jian Zhang3d6dee72016-01-08 15:27:34 +0800[diff] [blame]1465PHONY += kselftest-merge
1466kselftest-merge:
1467 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
Dan Rue6d3db462019-05-20 10:16:14 -0500[diff] [blame]1468 $(Q)find $(srctree)/tools/testing/selftests -name config | \
1469 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
Masahiro Yamada3e4c6942019-08-21 16:03:48 +0900[diff] [blame]1470 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
Bamvor Jian Zhang3d6dee72016-01-08 15:27:34 +0800[diff] [blame]1471
Shuah Khan5a5da782014-08-07 13:07:46 -0600[diff] [blame]1472# ---------------------------------------------------------------------------
Rob Herring37c8a5fa2018-01-10 15:19:37 -0600[diff] [blame]1473# Devicetree files
1474
1475ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
Will McVicker3d42cc92021-12-07 09:41:37 -0800[diff] [blame]1476# ANDROID: allow this to be overridden by the build environment. This allows
1477# one to compile a device tree that is located out-of-tree.
1478dtstree ?= arch/$(SRCARCH)/boot/dts
Rob Herring37c8a5fa2018-01-10 15:19:37 -0600[diff] [blame]1479endif
1480
1481ifneq ($(dtstree),)
1482
Masahiro Yamadaa5139fb2019-08-22 13:46:12 +0900[diff] [blame]1483%.dtb: include/config/kernel.release scripts_dtc
Rob Herring37c8a5fa2018-01-10 15:19:37 -0600[diff] [blame]1484 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1485
Viresh Kumarce88c9c2021-01-29 12:54:08 +0530[diff] [blame]1486%.dtbo: include/config/kernel.release scripts_dtc
1487 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1488
Masahiro Yamadac473a8d2020-02-23 04:04:34 +0900[diff] [blame]1489PHONY += dtbs dtbs_install dtbs_check
Masahiro Yamadab5154bf2020-03-04 12:20:36 +0900[diff] [blame]1490dtbs: include/config/kernel.release scripts_dtc
Rob Herring37c8a5fa2018-01-10 15:19:37 -0600[diff] [blame]1491 $(Q)$(MAKE) $(build)=$(dtstree)
1492
Masahiro Yamadab5154bf2020-03-04 12:20:36 +0900[diff] [blame]1493ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
Masahiro Yamadae10c43212020-03-04 12:20:37 +0900[diff] [blame]1494export CHECK_DTBS=y
Masahiro Yamadab5154bf2020-03-04 12:20:36 +0900[diff] [blame]1495dtbs: dt_binding_check
1496endif
1497
Masahiro Yamadab5154bf2020-03-04 12:20:36 +0900[diff] [blame]1498dtbs_check: dtbs
Rob Herring4f0e3a52018-09-06 13:26:07 -0500[diff] [blame]1499
Rob Herring37c8a5fa2018-01-10 15:19:37 -0600[diff] [blame]1500dtbs_install:
Masahiro Yamada2431f222020-03-07 02:08:51 +0900[diff] [blame]1501 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
Rob Herring37c8a5fa2018-01-10 15:19:37 -0600[diff] [blame]1502
1503ifdef CONFIG_OF_EARLY_FLATTREE
1504all: dtbs
1505endif
1506
1507endif
1508
1509PHONY += scripts_dtc
1510scripts_dtc: scripts_basic
1511 $(Q)$(MAKE) $(build)=scripts/dtc
1512
Masahiro Yamadae10c43212020-03-04 12:20:37 +0900[diff] [blame]1513ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1514export CHECK_DT_BINDING=y
1515endif
1516
Masahiro Yamadac473a8d2020-02-23 04:04:34 +0900[diff] [blame]1517PHONY += dt_binding_check
Rob Herring4f0e3a52018-09-06 13:26:07 -0500[diff] [blame]1518dt_binding_check: scripts_dtc
1519 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1520
Rob Herring37c8a5fa2018-01-10 15:19:37 -0600[diff] [blame]1521# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1522# Modules
1523
1524ifdef CONFIG_MODULES
1525
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200[diff] [blame]1526# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1527
Michal Marek73d13932010-03-10 12:28:58 +0100[diff] [blame]1528all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1529
Masahiro Yamada4b50c8c2020-05-31 17:47:06 +0900[diff] [blame]1530# When we're building modules with modversions, we need to consider
1531# the built-in objects during the descend as well, in order to
1532# make sure the checksums are up to date before we record them.
1533ifdef CONFIG_MODVERSIONS
1534 KBUILD_BUILTIN := 1
1535endif
1536
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900[diff] [blame]1537# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +0900[diff] [blame]1538#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900[diff] [blame]1539# A module can be listed more than once in obj-m resulting in
1540# duplicate lines in modules.order files. Those are removed
1541# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1542
Paul Smith4f193362006-03-05 17:14:10 -0500[diff] [blame]1543PHONY += modules
Elliot Bermanee1b16e2021-04-07 08:03:11 -0700[diff] [blame]1544# if KBUILD_BUILTIN && !KBUILD_MIXED_TREE, depend on vmlinux
1545modules: $(if $(KBUILD_BUILTIN), $(if $(KBUILD_MIXED_TREE),,vmlinux))
1546modules: modules_check modules_prepare
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1547
Masahiro Yamadab2c88552020-06-01 14:57:00 +0900[diff] [blame]1548cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1549
1550modules.order: $(subdir-modorder) FORCE
1551 $(call if_changed,modules_order)
1552
1553targets += modules.order
Michal Mareka6c36632010-03-08 10:07:12 +0100[diff] [blame]1554
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1555# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500[diff] [blame]1556PHONY += modules_prepare
Masahiro Yamada059bc9fc2018-11-29 12:56:30 +0900[diff] [blame]1557modules_prepare: prepare
Masahiro Yamada596b0472020-09-08 13:27:08 +0900[diff] [blame]1558 $(Q)$(MAKE) $(build)=scripts scripts/module.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1559
Masahiro Yamada961ab4a2021-03-31 22:38:09 +0900[diff] [blame]1560export modules_sign_only :=
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1561
Masahiro Yamada961ab4a2021-03-31 22:38:09 +0900[diff] [blame]1562ifeq ($(CONFIG_MODULE_SIG),y)
1563PHONY += modules_sign
1564modules_sign: modules_install
1565 @:
1566
1567# modules_sign is a subset of modules_install.
1568# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1569ifeq ($(filter modules_install,$(MAKECMDGOALS)),)
1570modules_sign_only := y
1571endif
1572endif
1573
1574modinst_pre :=
1575ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
1576modinst_pre := __modinst_pre
1577endif
1578
1579modules_install: $(modinst_pre)
Masahiro Yamada3e3005d2021-03-31 22:38:03 +0900[diff] [blame]1580PHONY += __modinst_pre
1581__modinst_pre:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1582 @rm -rf $(MODLIB)/kernel
1583 @rm -f $(MODLIB)/source
1584 @mkdir -p $(MODLIB)/kernel
Masahiro Yamada8e9b4662017-08-20 15:04:11 +0900[diff] [blame]1585 @ln -s $(abspath $(srctree)) $(MODLIB)/source
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1586 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1587 rm -f $(MODLIB)/build ; \
Michal Marek7e1c0472014-04-25 17:29:45 +0200[diff] [blame]1588 ln -s $(CURDIR) $(MODLIB)/build ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1589 fi
Masahiro Yamada1bd9a462019-07-17 15:17:50 +0900[diff] [blame]1590 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
Elliot Bermanee1b16e2021-04-07 08:03:11 -0700[diff] [blame]1591 @cp -f $(mixed-build-prefix)modules.builtin $(MODLIB)/
1592 @cp -f $(or $(mixed-build-prefix),$(objtree)/)modules.builtin.modinfo $(MODLIB)/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1593
1594endif # CONFIG_MODULES
1595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1596###
1597# Cleaning is done on three levels.
1598# make clean Delete most generated files
1599# Leave enough to build external modules
1600# make mrproper Delete the current configuration, and all generated files
1601# make distclean Remove editor backup files, patch leftover files and the like
1602
1603# Directories & files removed with 'make clean'
Masahiro Yamada69bc8d32021-03-26 03:54:09 +0900[diff] [blame]1604CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
Masahiro Yamada3d322852020-08-22 23:56:16 +0900[diff] [blame]1605 modules.builtin modules.builtin.modinfo modules.nsdeps \
Masahiro Yamada4c7858b2021-02-26 04:39:12 +0900[diff] [blame]1606 compile_commands.json .thinlto-cache
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1607
1608# Directories & files removed with 'make mrproper'
Masahiro Yamada0663c682020-05-04 17:08:07 +0900[diff] [blame]1609MRPROPER_FILES += include/config include/generated \
Masahiro Yamada46a63d42019-08-21 16:02:02 +0900[diff] [blame]1610 arch/$(SRCARCH)/include/generated .tmp_objdiff \
Masahiro Yamada0663c682020-05-04 17:08:07 +0900[diff] [blame]1611 debian snap tar-install \
1612 .config .config.old .version \
Masahiro Yamada46457132019-07-15 23:01:49 +0900[diff] [blame]1613 Module.symvers \
Nayna Jainb31f2a42021-04-09 10:35:05 -0400[diff] [blame]1614 certs/signing_key.pem certs/signing_key.x509 \
1615 certs/x509.genkey \
1616 vmlinux-gdb.py \
Masahiro Yamada46a63d42019-08-21 16:02:02 +0900[diff] [blame]1617 *.spec
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1618
1619# clean - Delete most, but leave enough to build external modules
1620#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1621clean: rm-files := $(CLEAN_FILES)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1622
Masahiro Yamada76cd3062019-08-11 00:53:05 +0900[diff] [blame]1623PHONY += archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1624
Pawel Mollbd1ee802012-10-29 11:23:02 +0000[diff] [blame]1625vmlinuxclean:
1626 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
Nicholas Pigginfbe6e372016-08-24 22:29:21 +1000[diff] [blame]1627 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
Pawel Mollbd1ee802012-10-29 11:23:02 +0000[diff] [blame]1628
Jiri Olsa50d3a3f2021-02-05 13:40:20 +0100[diff] [blame]1629clean: archclean vmlinuxclean resolve_btfids_clean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1630
1631# mrproper - Delete all generated files, including .config
1632#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1633mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
Mauro Carvalho Chehabcb43fb52017-05-14 11:50:01 -0300[diff] [blame]1634mrproper-dirs := $(addprefix _mrproper_,scripts)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1635
Masahiro Yamadab421b8a2019-01-14 17:29:29 +0900[diff] [blame]1636PHONY += $(mrproper-dirs) mrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1637$(mrproper-dirs):
1638 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1639
Masahiro Yamadab421b8a2019-01-14 17:29:29 +0900[diff] [blame]1640mrproper: clean $(mrproper-dirs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1641 $(call cmd,rmfiles)
1642
1643# distclean
1644#
Paul Smith4f193362006-03-05 17:14:10 -0500[diff] [blame]1645PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1646
1647distclean: mrproper
Masahiro Yamada19c8d9122021-05-04 19:10:56 +0900[diff] [blame]1648 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200[diff] [blame]1649 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Masahiro Yamadaf78271d2017-01-22 23:02:32 +0900[diff] [blame]1650 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
Masahiro Yamada7a02cec2021-05-04 19:10:57 +0900[diff] [blame]1651 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
1652 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1653 -type f -print | xargs rm -f
1654
1655
1656# Packaging of the kernel to various formats
1657# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1658
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -0300[diff] [blame]1659%src-pkg: FORCE
Masahiro Yamada000ec952019-08-21 16:02:04 +0900[diff] [blame]1660 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
Zach Brown031ecc62006-06-08 22:12:37 -0700[diff] [blame]1661%pkg: include/config/kernel.release FORCE
Masahiro Yamada000ec952019-08-21 16:02:04 +0900[diff] [blame]1662 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1663
1664# Brief documentation of the typical targets used
1665# ---------------------------------------------------------------------------
1666
Segher Boessenkool5dffbe82008-04-06 22:16:07 +0200[diff] [blame]1667boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Konstantin Khlebnikova1e7b7b2014-10-28 17:18:20 +0400[diff] [blame]1668boards := $(sort $(notdir $(boards)))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +0200[diff] [blame]1669board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1670board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1671
Masahiro Yamadafe69b422016-03-13 09:39:55 +0900[diff] [blame]1672PHONY += help
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1673help:
1674 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +0100[diff] [blame]1675 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +0200[diff] [blame]1676 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +0100[diff] [blame]1677 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +0200[diff] [blame]1678 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1679 @echo ''
1680 @echo 'Configuration targets:'
1681 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1682 @echo ''
1683 @echo 'Other generic targets:'
1684 @echo ' all - Build all targets marked with [*]'
1685 @echo '* vmlinux - Build the bare kernel'
1686 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +0100[diff] [blame]1687 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1688 @echo ' dir/ - Build all files in dir and below'
Wang YanQing40ab87a42015-12-11 00:35:19 +0800[diff] [blame]1689 @echo ' dir/file.[ois] - Build specified target only'
Vinícius Tinti433db3e2017-04-24 13:04:58 -0700[diff] [blame]1690 @echo ' dir/file.ll - Build the LLVM assembly file'
1691 @echo ' (requires compiler support for LLVM assembly generation)'
Joe Perches62718972010-01-13 09:31:44 -0800[diff] [blame]1692 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1693 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -0700[diff] [blame]1694 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -0400[diff] [blame]1695 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1696 @echo ' tags/TAGS - Generate tags file for editors'
1697 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800[diff] [blame]1698 @echo ' gtags - Generate GNU GLOBAL index'
Michal Marek3f1d9a62014-07-11 15:57:24 +0200[diff] [blame]1699 @echo ' kernelrelease - Output the release version string (use with make -s)'
1700 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1701 @echo ' image_name - Output the image name (use with make -s)'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200[diff] [blame]1702 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df32302007-01-29 13:47:01 +0100[diff] [blame]1703 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200[diff] [blame]1704 echo ''
Randy Dunlap31b8cc82017-05-08 15:55:08 -0700[diff] [blame]1705 @echo 'Static analysers:'
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1706 @echo ' checkstack - Generate a list of stack hogs'
Sam Ravnborgaa025e72007-11-14 21:34:55 +0100[diff] [blame]1707 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -0800[diff] [blame]1708 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +0200[diff] [blame]1709 @echo ' export_report - List the usages of all exported symbols'
Nicolas Palix74425ee2010-06-06 17:15:01 +0200[diff] [blame]1710 @echo ' headerdep - Detect inclusion cycles in headers'
Masahiro Yamada7f855fc82017-11-14 18:47:20 +0900[diff] [blame]1711 @echo ' coccicheck - Check with Coccinelle'
Nathan Huckleberry6ad7cbc2020-08-22 23:56:18 +0900[diff] [blame]1712 @echo ' clang-analyzer - Check with clang static analyzer'
1713 @echo ' clang-tidy - Check with clang-tidy'
Nicolas Palix74425ee2010-06-06 17:15:01 +0200[diff] [blame]1714 @echo ''
Matthias Maennich537d1f72019-11-11 14:56:43 +0000[diff] [blame]1715 @echo 'Tools:'
1716 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1717 @echo ''
Randy Dunlap31b8cc82017-05-08 15:55:08 -0700[diff] [blame]1718 @echo 'Kernel selftest:'
Shuah Khane51d8da2020-03-30 12:07:11 -0600[diff] [blame]1719 @echo ' kselftest - Build and run kernel selftest'
1720 @echo ' Build, install, and boot kernel before'
1721 @echo ' running kselftest on it'
1722 @echo ' Run as root for full coverage'
1723 @echo ' kselftest-all - Build kernel selftest'
1724 @echo ' kselftest-install - Build and install kernel selftest'
1725 @echo ' kselftest-clean - Remove all generated kselftest files'
1726 @echo ' kselftest-merge - Merge all the config dependencies of'
1727 @echo ' kselftest to existing .config.'
Shuah Khan5a5da782014-08-07 13:07:46 -0600[diff] [blame]1728 @echo ''
Rob Herring37c8a5fa2018-01-10 15:19:37 -0600[diff] [blame]1729 @$(if $(dtstree), \
1730 echo 'Devicetree:'; \
Stephen Boyd7aa8dd912019-08-13 11:38:25 -0700[diff] [blame]1731 echo '* dtbs - Build device tree blobs for enabled boards'; \
1732 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1733 echo ' dt_binding_check - Validate device tree binding documents'; \
1734 echo ' dtbs_check - Validate device tree source files';\
Rob Herring37c8a5fa2018-01-10 15:19:37 -0600[diff] [blame]1735 echo '')
1736
Randy Dunlap31b8cc82017-05-08 15:55:08 -0700[diff] [blame]1737 @echo 'Userspace tools targets:'
1738 @echo ' use "make tools/help"'
1739 @echo ' or "cd tools; make help"'
1740 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1741 @echo 'Kernel packaging:'
Masahiro Yamada000ec952019-08-21 16:02:04 +0900[diff] [blame]1742 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1743 @echo ''
1744 @echo 'Documentation targets:'
Mauro Carvalho Chehabcb43fb52017-05-14 11:50:01 -0300[diff] [blame]1745 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1746 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -0400[diff] [blame]1747 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1748 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -0400[diff] [blame]1749 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1750 @echo ''
1751 @$(if $(boards), \
1752 $(foreach b, $(boards), \
Geert Uytterhoeven42344482019-10-25 13:53:05 +0200[diff] [blame]1753 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1754 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +0200[diff] [blame]1755 @$(if $(board-dirs), \
1756 $(foreach b, $(board-dirs), \
1757 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1758 printf " %-16s - Show all of the above\\n" help-boards; \
1759 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1760
1761 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +0200[diff] [blame]1762 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1763 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Geert Uytterhoevena64c0442019-10-25 13:52:32 +0200[diff] [blame]1764 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1765 @echo ' (sparse by default)'
Dustin Kirkland701842e2006-05-23 15:57:23 -0500[diff] [blame]1766 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +0200[diff] [blame]1767 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Masahiro Yamadae27128d2019-09-01 01:25:55 +0900[diff] [blame]1768 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +0200[diff] [blame]1769 @echo ' 1: warnings which may be relevant and do not occur too often'
1770 @echo ' 2: warnings which occur quite often but may still be relevant'
1771 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +0200[diff] [blame]1772 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1773 @echo ''
1774 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1775 @echo 'For further info see the ./README file'
1776
1777
Segher Boessenkool5dffbe82008-04-06 22:16:07 +0200[diff] [blame]1778help-board-dirs := $(addprefix help-,$(board-dirs))
1779
1780help-boards: $(help-board-dirs)
1781
Michal Marekfbae4d52014-11-28 13:31:43 +0100[diff] [blame]1782boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +0200[diff] [blame]1783
1784$(help-board-dirs): help-%:
1785 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1786 @$(if $(boards-per-dir), \
1787 $(foreach b, $(boards-per-dir), \
1788 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1789 echo '')
1790
1791
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1792# Documentation targets
1793# ---------------------------------------------------------------------------
Jani Nikulae8939222017-10-09 18:26:15 +0300[diff] [blame]1794DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1795 linkcheckdocs dochelp refcheckdocs
Jani Nikula22cba312016-05-19 15:14:05 +0300[diff] [blame]1796PHONY += $(DOC_TARGETS)
Masahiro Yamadabc7b752a2019-08-22 02:33:21 +0900[diff] [blame]1797$(DOC_TARGETS):
Mauro Carvalho Chehabcb43fb52017-05-14 11:50:01 -0300[diff] [blame]1798 $(Q)$(MAKE) $(build)=Documentation $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1799
Masahiro Yamada67274c02019-02-19 18:33:02 +0900[diff] [blame]1800# Misc
1801# ---------------------------------------------------------------------------
1802
1803PHONY += scripts_gdb
Masahiro Yamada7a739ce2019-06-04 19:13:57 +0900[diff] [blame]1804scripts_gdb: prepare0
Masahiro Yamada1e5ff842019-02-19 18:33:04 +0900[diff] [blame]1805 $(Q)$(MAKE) $(build)=scripts/gdb
Masahiro Yamada8d2e5202019-02-19 18:33:05 +0900[diff] [blame]1806 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
Masahiro Yamada67274c02019-02-19 18:33:02 +0900[diff] [blame]1807
1808ifdef CONFIG_GDB_SCRIPTS
1809all: scripts_gdb
1810endif
1811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1812else # KBUILD_EXTMOD
1813
1814###
1815# External module support.
1816# When building external modules the kernel used as basis is considered
1817# read-only, and no consistency checks are made and the make
1818# system is not used on the basis kernel. If updates are required
Masahiro Yamada11122b82021-05-04 19:10:58 +0900[diff] [blame]1819# in the basis kernel ordinary make commands (without M=...) must be used.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1820
Masahiro Yamada62128042020-09-09 05:55:57 +0900[diff] [blame]1821# We are always building only modules.
1822KBUILD_BUILTIN :=
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1823KBUILD_MODULES := 1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1824
Masahiro Yamadac99f3912019-08-11 00:53:04 +0900[diff] [blame]1825build-dirs := $(KBUILD_EXTMOD)
Masahiro Yamada3d322852020-08-22 23:56:16 +0900[diff] [blame]1826$(MODORDER): descend
1827 @:
1828
Masahiro Yamada7f691802021-03-31 22:38:06 +0900[diff] [blame]1829compile_commands.json: $(extmod_prefix)compile_commands.json
Masahiro Yamada3d322852020-08-22 23:56:16 +0900[diff] [blame]1830PHONY += compile_commands.json
1831
Masahiro Yamada76cd3062019-08-11 00:53:05 +0900[diff] [blame]1832clean-dirs := $(KBUILD_EXTMOD)
Masahiro Yamada3d322852020-08-22 23:56:16 +0900[diff] [blame]1833clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
Sami Tolvanendc5723b2020-12-11 10:46:19 -0800[diff] [blame]1834 $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1835
Masahiro Yamada6072b2c2021-08-01 11:53:46 +0900[diff] [blame]1836PHONY += prepare
1837# now expand this into a simple variable to reduce the cost of shell evaluations
1838prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
1839prepare:
1840 @if [ "$(CC_VERSION_TEXT)" != $(CONFIG_CC_VERSION_TEXT) ]; then \
1841 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
1842 echo >&2 " The kernel was built by: "$(CONFIG_CC_VERSION_TEXT); \
1843 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \
1844 fi
1845
Masahiro Yamadafe69b422016-03-13 09:39:55 +0900[diff] [blame]1846PHONY += help
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1847help:
1848 @echo ' Building external modules.'
1849 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1850 @echo ''
1851 @echo ' modules - default target, build the module(s)'
1852 @echo ' modules_install - install the module'
Elliot Berman280812b2020-07-24 18:12:48 -0700[diff] [blame]1853 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
1854 @echo ' (default: $(abspath $(INSTALL_HDR_PATH)))'
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1855 @echo ' clean - remove generated files in module directory only'
1856 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +0100[diff] [blame]1857
Masahiro Yamada596b0472020-09-08 13:27:08 +0900[diff] [blame]1858# no-op for external module builds
Masahiro Yamada6072b2c2021-08-01 11:53:46 +0900[diff] [blame]1859PHONY += modules_prepare
Masahiro Yamada596b0472020-09-08 13:27:08 +0900[diff] [blame]1860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1861endif # KBUILD_EXTMOD
1862
Masahiro Yamada3e3005d2021-03-31 22:38:03 +0900[diff] [blame]1863# ---------------------------------------------------------------------------
1864# Modules
1865
1866PHONY += modules modules_install
1867
1868ifdef CONFIG_MODULES
1869
Masahiro Yamada1a998be2021-03-31 22:38:05 +0900[diff] [blame]1870modules: modules_check
Masahiro Yamada3e3005d2021-03-31 22:38:03 +0900[diff] [blame]1871 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1872
Masahiro Yamada1a998be2021-03-31 22:38:05 +0900[diff] [blame]1873PHONY += modules_check
1874modules_check: $(MODORDER)
1875 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1876
Masahiro Yamada3ac42b22021-03-31 22:38:04 +0900[diff] [blame]1877quiet_cmd_depmod = DEPMOD $(MODLIB)
Masahiro Yamada3e3005d2021-03-31 22:38:03 +0900[diff] [blame]1878 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Lee Jones85adc862021-05-15 09:01:50 +0100[diff] [blame]1879 $(KERNELRELEASE) $(mixed-build-prefix)
Masahiro Yamada3e3005d2021-03-31 22:38:03 +0900[diff] [blame]1880
1881modules_install:
1882 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Masahiro Yamadad0245b02023-08-23 20:50:41 +0900[diff] [blame]1883ifndef modules_sign_only
Masahiro Yamada3e3005d2021-03-31 22:38:03 +0900[diff] [blame]1884 $(call cmd,depmod)
Masahiro Yamadad0245b02023-08-23 20:50:41 +0900[diff] [blame]1885endif
Masahiro Yamada3e3005d2021-03-31 22:38:03 +0900[diff] [blame]1886
1887else # CONFIG_MODULES
1888
1889# Modules not configured
1890# ---------------------------------------------------------------------------
1891
1892modules modules_install:
1893 @echo >&2 '***'
1894 @echo >&2 '*** The present kernel configuration has modules disabled.'
1895 @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
1896 @echo >&2 '*** to enable CONFIG_MODULES.'
1897 @echo >&2 '***'
1898 @exit 1
1899
Masahiro Yamadaf5c59342022-08-28 11:39:50 +0900[diff] [blame]1900KBUILD_MODULES :=
1901
Masahiro Yamada3e3005d2021-03-31 22:38:03 +0900[diff] [blame]1902endif # CONFIG_MODULES
1903
Masahiro Yamadab1fbfcb2019-11-18 13:52:47 +0900[diff] [blame]1904# Single targets
1905# ---------------------------------------------------------------------------
1906# To build individual files in subdirectories, you can do like this:
1907#
1908# make foo/bar/baz.s
1909#
1910# The supported suffixes for single-target are listed in 'single-targets'
1911#
1912# To build only under specific subdirectories, you can do like this:
1913#
1914# make foo/bar/baz/
1915
1916ifdef single-build
1917
1918# .ko is special because modpost is needed
1919single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
Masahiro Yamada2c3a1d52022-04-07 00:30:22 +0900[diff] [blame]1920single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
1921 $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
Masahiro Yamadab1fbfcb2019-11-18 13:52:47 +0900[diff] [blame]1922
1923$(single-ko): single_modpost
1924 @:
1925$(single-no-ko): descend
1926 @:
1927
Masahiro Yamadaf5c59342022-08-28 11:39:50 +0900[diff] [blame]1928# Remove MODORDER when done because it is not the real one.
Masahiro Yamadab1fbfcb2019-11-18 13:52:47 +0900[diff] [blame]1929PHONY += single_modpost
Masahiro Yamada596b0472020-09-08 13:27:08 +0900[diff] [blame]1930single_modpost: $(single-no-ko) modules_prepare
Masahiro Yamada7f691802021-03-31 22:38:06 +0900[diff] [blame]1931 $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
Masahiro Yamadab1fbfcb2019-11-18 13:52:47 +0900[diff] [blame]1932 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Masahiro Yamadaf5c59342022-08-28 11:39:50 +0900[diff] [blame]1933 $(Q)rm -f $(MODORDER)
Masahiro Yamadab1fbfcb2019-11-18 13:52:47 +0900[diff] [blame]1934
Masahiro Yamada7f691802021-03-31 22:38:06 +0900[diff] [blame]1935export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
Masahiro Yamadab1fbfcb2019-11-18 13:52:47 +0900[diff] [blame]1936
1937# trim unrelated directories
1938build-dirs := $(foreach d, $(build-dirs), \
1939 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1940
Masahiro Yamadab97e4102022-10-15 05:18:11 +0900[diff] [blame]1941KBUILD_MODULES := 1
Masahiro Yamadab1fbfcb2019-11-18 13:52:47 +0900[diff] [blame]1942
Masahiro Yamadab480fec2020-05-22 10:59:59 +0900[diff] [blame]1943endif
1944
Masahiro Yamadac99f3912019-08-11 00:53:04 +0900[diff] [blame]1945# Handle descending into subdirectories listed in $(build-dirs)
1946# Preset locale variables to speed up the build process. Limit locale
1947# tweaks to this spot to avoid wrong language settings when running
1948# make menuconfig etc.
1949# Error messages still appears in the original language
1950PHONY += descend $(build-dirs)
1951descend: $(build-dirs)
1952$(build-dirs): prepare
Masahiro Yamadab1fbfcb2019-11-18 13:52:47 +0900[diff] [blame]1953 $(Q)$(MAKE) $(build)=$@ \
Masahiro Yamada20b1be52020-07-08 01:35:08 +0900[diff] [blame]1954 single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
Elliot Bermanee1b16e2021-04-07 08:03:11 -0700[diff] [blame]1955 $(if $(KBUILD_MIXED_TREE),,need-builtin=1) need-modorder=1
Masahiro Yamadac99f3912019-08-11 00:53:04 +0900[diff] [blame]1956
Masahiro Yamada76cd3062019-08-11 00:53:05 +0900[diff] [blame]1957clean-dirs := $(addprefix _clean_, $(clean-dirs))
1958PHONY += $(clean-dirs) clean
1959$(clean-dirs):
1960 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1961
Michal Marek88d7be02010-09-06 12:00:08 +0200[diff] [blame]1962clean: $(clean-dirs)
Michal Marek88d7be02010-09-06 12:00:08 +0200[diff] [blame]1963 $(call cmd,rmfiles)
Isaac J. Manjarres55dd4512023-01-05 17:53:25 -0800[diff] [blame]1964 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) \
1965 $(if $(filter-out arch/$(SRCARCH)/boot/dts, $(dtstree)), $(dtstree)) \
1966 $(RCS_FIND_IGNORE) \
Masahiro Yamadaef46d9b2017-11-17 01:49:13 +0900[diff] [blame]1967 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
Rob Herring4f0e3a52018-09-06 13:26:07 -0500[diff] [blame]1968 -o -name '*.ko.*' \
Viresh Kumarce88c9c2021-01-29 12:54:08 +0530[diff] [blame]1969 -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
Masahiro Yamadaef46d9b2017-11-17 01:49:13 +0900[diff] [blame]1970 -o -name '*.dwo' -o -name '*.lst' \
Masahiro Yamada0e5851b2022-04-07 00:30:20 +0900[diff] [blame]1971 -o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \
Michal Marek88d7be02010-09-06 12:00:08 +0200[diff] [blame]1972 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Masahiro Yamada9a8dfb32018-03-23 22:04:31 +0900[diff] [blame]1973 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
Masahiro Yamada4fa8bc92018-03-23 22:04:37 +0900[diff] [blame]1974 -o -name '*.asn1.[ch]' \
Michal Marek88d7be02010-09-06 12:00:08 +0200[diff] [blame]1975 -o -name '*.symtypes' -o -name 'modules.order' \
Masahiro Yamada8b41fc42019-12-19 17:33:29 +0900[diff] [blame]1976 -o -name '.tmp_*.o.*' \
Emese Revfy6b90bd42016-05-24 00:09:38 +0200[diff] [blame]1977 -o -name '*.c.[012]*.*' \
Vinícius Tinti433db3e2017-04-24 13:04:58 -0700[diff] [blame]1978 -o -name '*.ll' \
Sami Tolvanen38e89182020-12-11 10:46:20 -0800[diff] [blame]1979 -o -name '*.gcno' \
1980 -o -name '*.*.symversions' \) -type f -print | xargs rm -f
Michal Marek88d7be02010-09-06 12:00:08 +0200[diff] [blame]1981
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1982# Generate tags for editors
1983# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +0100[diff] [blame]1984quiet_cmd_tags = GEN $@
Masahiro Yamada858805b2019-08-25 22:28:37 +0900[diff] [blame]1985 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1986
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800[diff] [blame]1987tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1988 $(call cmd,tags)
1989
Matthias Maennich537d1f72019-11-11 14:56:43 +0000[diff] [blame]1990# Script to generate missing namespace dependencies
1991# ---------------------------------------------------------------------------
1992
1993PHONY += nsdeps
Masahiro Yamadabff9c622019-10-29 21:38:06 +0900[diff] [blame]1994nsdeps: export KBUILD_NSDEPS=1
Matthias Maennich537d1f72019-11-11 14:56:43 +0000[diff] [blame]1995nsdeps: modules
Masahiro Yamadabff9c622019-10-29 21:38:06 +0900[diff] [blame]1996 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
Matthias Maennich537d1f72019-11-11 14:56:43 +0000[diff] [blame]1997
Masahiro Yamada3d322852020-08-22 23:56:16 +0900[diff] [blame]1998# Clang Tooling
1999# ---------------------------------------------------------------------------
2000
2001quiet_cmd_gen_compile_commands = GEN $@
2002 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
2003
Masahiro Yamada7f691802021-03-31 22:38:06 +0900[diff] [blame]2004$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
Shubhi Jain4978d732022-06-09 16:15:03 -0700[diff] [blame]2005 $(if $(KBUILD_EXTMOD)$(KBUILD_MIXED_TREE),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
Masahiro Yamada3d322852020-08-22 23:56:16 +0900[diff] [blame]2006 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
2007 $(call if_changed,gen_compile_commands)
2008
Masahiro Yamada7f691802021-03-31 22:38:06 +0900[diff] [blame]2009targets += $(extmod_prefix)compile_commands.json
Masahiro Yamada3d322852020-08-22 23:56:16 +0900[diff] [blame]2010
Nathan Huckleberry6ad7cbc2020-08-22 23:56:18 +0900[diff] [blame]2011PHONY += clang-tidy clang-analyzer
2012
2013ifdef CONFIG_CC_IS_CLANG
2014quiet_cmd_clang_tools = CHECK $<
2015 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
2016
Masahiro Yamada7f691802021-03-31 22:38:06 +0900[diff] [blame]2017clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
Nathan Huckleberry6ad7cbc2020-08-22 23:56:18 +0900[diff] [blame]2018 $(call cmd,clang_tools)
2019else
2020clang-tidy clang-analyzer:
2021 @echo "$@ requires CC=clang" >&2
2022 @false
2023endif
2024
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2025# Scripts to check various things for consistency
2026# ---------------------------------------------------------------------------
2027
Jacob Keller7dfbea42020-10-09 17:18:44 -0700[diff] [blame]2028PHONY += includecheck versioncheck coccicheck export_report
Peter Foley279f3dd2011-04-26 17:15:01 -0400[diff] [blame]2029
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2030includecheck:
Peter Foley436f8762011-04-26 17:18:29 -0400[diff] [blame]2031 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2032 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +0100[diff] [blame]2033 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2034
2035versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -0400[diff] [blame]2036 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2037 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +0100[diff] [blame]2038 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2039
Nicolas Palix74425ee2010-06-06 17:15:01 +0200[diff] [blame]2040coccicheck:
Masahiro Yamada858805b2019-08-25 22:28:37 +0900[diff] [blame]2041 $(Q)$(BASH) $(srctree)/scripts/$@
Nicolas Palix74425ee2010-06-06 17:15:01 +0200[diff] [blame]2042
Adrian Bunk295ac052007-08-24 23:04:56 +0200[diff] [blame]2043export_report:
2044 $(PERL) $(srctree)/scripts/export_report.pl
2045
Mike Marciniszync398ff02013-06-24 08:48:37 -0400[diff] [blame]2046PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -0700[diff] [blame]2047
Jeff Dike011e3a92006-12-13 00:34:12 -0800[diff] [blame]2048# UML needs a little special treatment here. It wants to use the host
2049# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2050# else wants $(ARCH), including people doing cross-builds, which means
2051# that $(SUBARCH) doesn't work here.
2052ifeq ($(ARCH), um)
2053CHECKSTACK_ARCH := $(SUBARCH)
2054else
2055CHECKSTACK_ARCH := $(ARCH)
2056endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2057checkstack:
2058 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Masahiro Yamada75dd4742019-07-06 12:07:11 +0900[diff] [blame]2059 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2060
Amerigo Wang7b8ea532010-08-20 05:36:06 -0400[diff] [blame]2061kernelrelease:
Will McVickerf0bec7a2020-07-09 15:33:45 -0700[diff] [blame]2062 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion \
2063 $(srctree) $(BRANCH) $(KMI_GENERATION))"
Amerigo Wang01ab1782010-06-28 10:45:21 +0800[diff] [blame]2064
Sam Ravnborgcb584552006-01-09 21:20:34 +0100[diff] [blame]2065kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100[diff] [blame]2066 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2067
Mike Marciniszync398ff02013-06-24 08:48:37 -0400[diff] [blame]2068image_name:
2069 @echo $(KBUILD_IMAGE)
2070
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2071quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
Masahiro Yamada0663c682020-05-04 17:08:07 +0900[diff] [blame]2072 cmd_rmfiles = rm -rf $(rm-files)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2073
Masahiro Yamada392885e2018-11-30 10:05:22 +0900[diff] [blame]2074# read saved command lines for existing targets
2075existing-targets := $(wildcard $(sort $(targets)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2076
Masahiro Yamadab9999232019-02-22 16:40:08 +0900[diff] [blame]2077-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2078
SZ Lin (林上智)46b7c492020-03-01 00:09:58 +0800[diff] [blame]2079endif # config-build
Masahiro Yamada2042b542019-08-11 00:53:03 +0900[diff] [blame]2080endif # mixed-build
2081endif # need-sub-make
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2082
Paul Smith4f193362006-03-05 17:14:10 -0500[diff] [blame]2083PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2084FORCE:
Paul Smith4f193362006-03-05 17:14:10 -0500[diff] [blame]2085
Ulf Magnussonbd412d82018-07-05 12:33:07 +0900[diff] [blame]2086# Declare the contents of the PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400[diff] [blame]2087# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -0500[diff] [blame]2088.PHONY: $(PHONY)