xref: /openbmc/linux/Makefile (revision d952cfaf0cffdbbb0433c67206b645131f17ca5f)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
3e73f0f0eSLinus TorvaldsPATCHLEVEL = 14
455922c9dSLinus TorvaldsSUBLEVEL = 0
5e73f0f0eSLinus TorvaldsEXTRAVERSION = -rc1
613311e74SLinus TorvaldsNAME = Opossums on Parade
71da177e4SLinus Torvalds
81da177e4SLinus Torvalds# *DOCUMENTATION*
91da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
101da177e4SLinus Torvalds# More info can be located in ./README
111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
131da177e4SLinus Torvalds
14121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \
15121c2a13SMasahiro Yamada	$(error targets prefixed with '__' are only for internal use))
16121c2a13SMasahiro Yamada
17ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
18121c2a13SMasahiro YamadaPHONY := __all
19121c2a13SMasahiro Yamada__all:
20ba634eceSMasahiro Yamada
211da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
221da177e4SLinus Torvalds# to get the ordering right.
231da177e4SLinus Torvalds#
241da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
251da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
261da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
27f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
281da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
291da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
301da177e4SLinus Torvalds# is now up to date.
311da177e4SLinus Torvalds#
321da177e4SLinus Torvalds# The only cases where we need to modify files which have global
331da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
341da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
351da177e4SLinus Torvalds# prepare rule.
361da177e4SLinus Torvalds
37221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
383812b8c5SMasahiro Yamada
393812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
403812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
413812b8c5SMasahiro YamadaMAKEFLAGS += -rR
423812b8c5SMasahiro Yamada
433812b8c5SMasahiro Yamada# Avoid funny character set dependencies
443812b8c5SMasahiro Yamadaunexport LC_ALL
453812b8c5SMasahiro YamadaLC_COLLATE=C
463812b8c5SMasahiro YamadaLC_NUMERIC=C
473812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
483812b8c5SMasahiro Yamada
493812b8c5SMasahiro Yamada# Avoid interference with shell env settings
503812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
513812b8c5SMasahiro Yamada
52066b7ed9SMichal Marek# Beautify output
53066b7ed9SMichal Marek# ---------------------------------------------------------------------------
54066b7ed9SMichal Marek#
55066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
56066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
57066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
58066b7ed9SMichal Marek#
59066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
60066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
61066b7ed9SMichal Marek#
62066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
63066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
64066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
65066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
66066b7ed9SMichal Marek#
67066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
68066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
69066b7ed9SMichal Marek#
70066b7ed9SMichal Marek#	$(Q)ln $@ :<
71066b7ed9SMichal Marek#
72066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
73066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
74505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
75066b7ed9SMichal Marek#
761da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
771da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
781da177e4SLinus Torvalds
791da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
801da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
811da177e4SLinus Torvaldsendif
821da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
831da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
841da177e4SLinus Torvaldsendif
851da177e4SLinus Torvalds
86066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
87066b7ed9SMichal Marek  quiet =
88066b7ed9SMichal Marek  Q =
89066b7ed9SMichal Marekelse
90066b7ed9SMichal Marek  quiet=quiet_
91066b7ed9SMichal Marek  Q = @
92066b7ed9SMichal Marekendif
93066b7ed9SMichal Marek
94066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
95066b7ed9SMichal Marek# commands
96066b7ed9SMichal Marek
976f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
98066b7ed9SMichal Marek  quiet=silent_
9922149454SMasahiro Yamada  KBUILD_VERBOSE = 0
100066b7ed9SMichal Marekendif
101066b7ed9SMichal Marek
102066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
103066b7ed9SMichal Marek
104bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
105bcf637f5SMasahiro Yamada# C compilation.
106bcf637f5SMasahiro Yamada#
107bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
108bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
109bcf637f5SMasahiro Yamada# of whether they are re-compiled or not.
110bcf637f5SMasahiro Yamada#
111bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details,
112bcf637f5SMasahiro Yamada# including where to get the "sparse" utility.
113bcf637f5SMasahiro Yamada
114bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line")
115bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
116bcf637f5SMasahiro Yamadaendif
117bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC
118bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = 0
119bcf637f5SMasahiro Yamadaendif
120bcf637f5SMasahiro Yamada
121bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC
122bcf637f5SMasahiro Yamada
123bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
124bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
125bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line")
126bcf637f5SMasahiro Yamada  KBUILD_EXTMOD := $(M)
127bcf637f5SMasahiro Yamadaendif
128bcf637f5SMasahiro Yamada
129bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \
130bcf637f5SMasahiro Yamada	$(error building multiple external modules is not supported))
131bcf637f5SMasahiro Yamada
13274ee585bSMasahiro Yamada# Remove trailing slashes
13374ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),)
13474ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
13574ee585bSMasahiro Yamadaendif
13674ee585bSMasahiro Yamada
137bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD
138bcf637f5SMasahiro Yamada
13925b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
14025b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
14125b146c5SMasahiro Yamada#
14225b146c5SMasahiro Yamada# For example, you can do this:
14325b146c5SMasahiro Yamada#
14425b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
14525b146c5SMasahiro Yamada#
14625b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
14725b146c5SMasahiro Yamada# two syntaxes to specify it.
14825b146c5SMasahiro Yamada#
1491da177e4SLinus Torvalds# 1) O=
1501da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1511da177e4SLinus Torvalds#
1521da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
15325b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
15425b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1551da177e4SLinus Torvalds#
1561da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1571da177e4SLinus Torvalds# variable.
1581da177e4SLinus Torvalds
15925b146c5SMasahiro Yamada# Do we want to change the working directory?
1601da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1611da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1621da177e4SLinus Torvaldsendif
1631da177e4SLinus Torvalds
16425b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
16525b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
16625b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
16725b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
16825b146c5SMasahiro Yamada$(if $(abs_objtree),, \
16925b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
17025b146c5SMasahiro Yamada
17125b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
17225b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
17325b146c5SMasahiro Yamadaelse
17425b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
17525b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
17625b146c5SMasahiro Yamada
17725b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
17825b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
17925b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
18025b146c5SMasahiro Yamadaelse
18125b146c5SMasahiro Yamadaneed-sub-make := 1
18251193b76SRobert Jarzmikendif
18351193b76SRobert Jarzmik
18430cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST))
18530cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile)))
1861da177e4SLinus Torvalds
18725b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
18825b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
18925b146c5SMasahiro Yamadaendif
19025b146c5SMasahiro Yamada
19125b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
19280463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
19380463f1bSMasahiro Yamada#
19480463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
19525b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
19625b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
197688931a5SMasahiro Yamadaneed-sub-make := 1
19825b146c5SMasahiro Yamadaendif
1993812b8c5SMasahiro Yamada
200688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
201688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
202688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
203688931a5SMasahiro Yamadaneed-sub-make := 1
204688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
20593fdddfeSMasahiro Yamada$(this-makefile): ;
206688931a5SMasahiro Yamadaendif
207688931a5SMasahiro Yamada
20825b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
209221cc2d2SMasahiro Yamadaexport sub_make_done := 1
210221cc2d2SMasahiro Yamada
211688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
212688931a5SMasahiro Yamada
213121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make
2140b35786dSMilton Miller
215121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
21616f89098SCharles Keepax	@:
2170b35786dSMilton Miller
218c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
219121c2a13SMasahiro Yamada__sub-make:
22025b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
2211da177e4SLinus Torvalds
222688931a5SMasahiro Yamadaendif # need-sub-make
223221cc2d2SMasahiro Yamadaendif # sub_make_done
224688931a5SMasahiro Yamada
2251da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
226688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
2271da177e4SLinus Torvalds
2287ff52571SMasahiro Yamada# Do not print "Entering directory ...",
2297ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
2307ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
2317ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
2327ff52571SMasahiro Yamada
23325b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
2349da0763bSMichal Marek        # building in the source tree
2359da0763bSMichal Marek        srctree := .
236051f278eSMasahiro Yamada	building_out_of_srctree :=
2379da0763bSMichal Marekelse
23825b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
2399da0763bSMichal Marek                # building in a subdirectory of the source tree
2409da0763bSMichal Marek                srctree := ..
2419da0763bSMichal Marek        else
24225b146c5SMasahiro Yamada                srctree := $(abs_srctree)
2439da0763bSMichal Marek        endif
244051f278eSMasahiro Yamada	building_out_of_srctree := 1
2459da0763bSMichal Marekendif
2462c1f4f12SMasahiro Yamada
24795fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
24895fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
24995fd3f87SMasahiro Yamadaendif
2502c1f4f12SMasahiro Yamada
2517e1c0477SMichal Marekobjtree		:= .
2526b12de69SMasahiro YamadaVPATH		:= $(srctree)
2531da177e4SLinus Torvalds
254051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
2551da177e4SLinus Torvalds
2562c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2572c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2582c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2592c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2602c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2612c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2622c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2632c1f4f12SMasahiro Yamada
2642c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2652c1f4f12SMasahiro Yamada
26622340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
26722340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2682c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
26959b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
2704623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
2714623980dSDavid Engraf			 outputmakefile
272805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install
273805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed.
274805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \
275805b2e1dSMasahiro Yamada			headers_install modules_install kernelrelease image_name
276993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
277993bdde9SMasahiro Yamada			  image_name
278394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
2792c1f4f12SMasahiro Yamada
2802042b548SMasahiro Yamadaconfig-build	:=
2812042b548SMasahiro Yamadamixed-build	:=
2822042b548SMasahiro Yamadaneed-config	:= 1
283805b2e1dSMasahiro Yamadaneed-compiler	:= 1
284d7942413SMasahiro Yamadamay-sync-config	:= 1
285394053f4SMasahiro Yamadasingle-build	:=
2862c1f4f12SMasahiro Yamada
2872c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2882c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2892042b548SMasahiro Yamada		need-config :=
2902c1f4f12SMasahiro Yamada	endif
2912c1f4f12SMasahiro Yamadaendif
2922c1f4f12SMasahiro Yamada
293805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
294805b2e1dSMasahiro Yamada	ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
295805b2e1dSMasahiro Yamada		need-compiler :=
296805b2e1dSMasahiro Yamada	endif
297805b2e1dSMasahiro Yamadaendif
298805b2e1dSMasahiro Yamada
299d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
300d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
3012042b548SMasahiro Yamada		may-sync-config :=
302d7942413SMasahiro Yamada	endif
303d7942413SMasahiro Yamadaendif
304d7942413SMasahiro Yamada
305d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
3062042b548SMasahiro Yamada	may-sync-config :=
307d7942413SMasahiro Yamadaendif
308d7942413SMasahiro Yamada
3092c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
310efbf9726SMasahiro Yamada        ifneq ($(filter %config,$(MAKECMDGOALS)),)
3112042b548SMasahiro Yamada		config-build := 1
3122c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
3132042b548SMasahiro Yamada			mixed-build := 1
3142c1f4f12SMasahiro Yamada                endif
3152c1f4f12SMasahiro Yamada        endif
3162c1f4f12SMasahiro Yamadaendif
31722340a06SMasahiro Yamada
318394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
319394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
320394053f4SMasahiro Yamada	single-build := 1
321394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
322394053f4SMasahiro Yamada		mixed-build := 1
323394053f4SMasahiro Yamada	endif
324394053f4SMasahiro Yamadaendif
325394053f4SMasahiro Yamada
32622340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
32722340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
32822340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3292042b548SMasahiro Yamada		mixed-build := 1
33022340a06SMasahiro Yamada        endif
33122340a06SMasahiro Yamadaendif
33222340a06SMasahiro Yamada
3332c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3342c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3352c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3362042b548SMasahiro Yamada		mixed-build := 1
3372c1f4f12SMasahiro Yamada        endif
3382c1f4f12SMasahiro Yamadaendif
3392c1f4f12SMasahiro Yamada
3402042b548SMasahiro Yamadaifdef mixed-build
3412c1f4f12SMasahiro Yamada# ===========================================================================
3422c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3432c1f4f12SMasahiro Yamada# Handle them one by one.
3442c1f4f12SMasahiro Yamada
3452c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3462c1f4f12SMasahiro Yamada
347121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one
3482c1f4f12SMasahiro Yamada	@:
3492c1f4f12SMasahiro Yamada
3502c1f4f12SMasahiro Yamada__build_one_by_one:
3512c1f4f12SMasahiro Yamada	$(Q)set -e; \
3522c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3532c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3542c1f4f12SMasahiro Yamada	done
3552c1f4f12SMasahiro Yamada
3562042b548SMasahiro Yamadaelse # !mixed-build
3572c1f4f12SMasahiro Yamada
3583204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include
3592c1f4f12SMasahiro Yamada
3602c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3612c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3622c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3632c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3642c1f4f12SMasahiro Yamada
3653204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include
3661da177e4SLinus Torvalds
3671da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3681da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3691da177e4SLinus Torvalds#
3701da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3711da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3721da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3731da177e4SLinus Torvalds# make ARCH=ia64
3741da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3751da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3761da177e4SLinus Torvalds
3771da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3781da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3791da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3801da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3811da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3821da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3831da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3841da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3852331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3861da177e4SLinus Torvalds
3871da177e4SLinus Torvalds# Architecture as present in compile.h
3881da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3896752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3901da177e4SLinus Torvalds
391d746d647SSam Ravnborg# Additional ARCH settings for x86
392d746d647SSam Ravnborgifeq ($(ARCH),i386)
393d746d647SSam Ravnborg        SRCARCH := x86
394d746d647SSam Ravnborgendif
395d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
396d746d647SSam Ravnborg        SRCARCH := x86
397d746d647SSam Ravnborgendif
39874b469f2SSam Ravnborg
3995e538790SSam Ravnborg# Additional ARCH settings for sparc
400e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
401e69f58c0SNamhyung Kim       SRCARCH := sparc
402e69f58c0SNamhyung Kimendif
403a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
4045e538790SSam Ravnborg       SRCARCH := sparc
405a439fe51SSam Ravnborgendif
4062fb9b1bdSSam Ravnborg
407f02aa48dSMasahiro Yamadaexport cross_compiling :=
408f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH))
409f02aa48dSMasahiro Yamadacross_compiling := 1
410f02aa48dSMasahiro Yamadaendif
411f02aa48dSMasahiro Yamada
41214cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
41341263fc6SBen Gardinerexport KCONFIG_CONFIG
41414cdd3c4SRoman Zippel
4151da177e4SLinus Torvalds# SHELL used by kbuild
416858805b3SMasahiro YamadaCONFIG_SHELL := sh
4171da177e4SLinus Torvalds
4186d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
4196d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4206d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
421d7f14c66SUwe Kleine-König
422a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
423a0d1c951SMasahiro YamadaHOSTCC	= clang
424a0d1c951SMasahiro YamadaHOSTCXX	= clang++
425a0d1c951SMasahiro Yamadaelse
4261da177e4SLinus TorvaldsHOSTCC	= gcc
4271da177e4SLinus TorvaldsHOSTCXX	= g++
428a0d1c951SMasahiro Yamadaendif
4297f3a59dbSMasahiro Yamada
4307f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
4317f3a59dbSMasahiro Yamada			      -O2 -fomit-frame-pointer -std=gnu89
4327f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS :=
4337f3a59dbSMasahiro Yamada
4347f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS   := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
435735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
436f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
437f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4381da177e4SLinus Torvalds
4391da177e4SLinus Torvalds# Make variables (CC, etc...)
4401da177e4SLinus TorvaldsCPP		= $(CC) -E
441a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
442a0d1c951SMasahiro YamadaCC		= clang
443a0d1c951SMasahiro YamadaLD		= ld.lld
444a0d1c951SMasahiro YamadaAR		= llvm-ar
445a0d1c951SMasahiro YamadaNM		= llvm-nm
446a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
447a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
448a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
449a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
450a0d1c951SMasahiro Yamadaelse
451a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
452a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
4531da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4541da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4551da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4561da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
457eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
458a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
459a0d1c951SMasahiro Yamadaendif
460e83b9f55SAndrii NakryikoPAHOLE		= pahole
461c9a0f3b8SJiri OlsaRESOLVE_BTFIDS	= $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
46273a4f6dbSMasahiro YamadaLEX		= flex
46373a4f6dbSMasahiro YamadaYACC		= bison
4641da177e4SLinus TorvaldsAWK		= awk
465caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
466436e980eSDominique MartinetDEPMOD		= depmod
4671da177e4SLinus TorvaldsPERL		= perl
468e9781b52SMasahiro YamadaPYTHON3		= python3
4691da177e4SLinus TorvaldsCHECK		= sparse
470858805b3SMasahiro YamadaBASH		= bash
471e4a42c82SDenis EfremovKGZIP		= gzip
472e4a42c82SDenis EfremovKBZIP2		= bzip2
473e4a42c82SDenis EfremovKLZOP		= lzop
4748dfb61dcSDenis EfremovLZMA		= lzma
4758dfb61dcSDenis EfremovLZ4		= lz4c
4768dfb61dcSDenis EfremovXZ		= xz
47748f7ddf7SNick TerrellZSTD		= zstd
4788dfb61dcSDenis Efremov
47980a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4806c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4810c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4826588169dSSam RavnborgCFLAGS_MODULE   =
4836588169dSSam RavnborgAFLAGS_MODULE   =
4846588169dSSam RavnborgLDFLAGS_MODULE  =
4851da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4861da177e4SLinus TorvaldsAFLAGS_KERNEL	=
487b36fad65SMichal MarekLDFLAGS_vmlinux =
4881da177e4SLinus Torvalds
489abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
490abbf1590SDavid HowellsUSERINCLUDE    := \
4919d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4929d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
493abbf1590SDavid Howells		-I$(srctree)/include/uapi \
4943308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
495ce6ed1c4SMasahiro Yamada                -include $(srctree)/include/linux/compiler-version.h \
496abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
497abbf1590SDavid Howells
4981da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
4991da177e4SLinus Torvalds# Needed to be compatible with the O= option
500abbf1590SDavid HowellsLINUXINCLUDE    := \
5019d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
5029d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
503051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
504f8224f7fSMasahiro Yamada		-I$(objtree)/include \
505f8224f7fSMasahiro Yamada		$(USERINCLUDE)
5061da177e4SLinus Torvalds
50742a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
508eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
50942a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
510b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
511172aad81SOlaf Hering		   -Werror=return-type -Wno-format-security \
512433dc2ebSMasahiro Yamada		   -std=gnu89
513433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
51480c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
51580c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
5166588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
5176588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
51810df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
519d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
5205241ab4cSMasahiro YamadaCLANG_FLAGS :=
5211da177e4SLinus Torvalds
522aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
523d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
524d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
52548f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
5267bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
5271da177e4SLinus Torvalds
528d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
5290e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
530222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
5316588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
53280c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
5331da177e4SLinus Torvalds
5341da177e4SLinus Torvalds# Files to ignore in find ... statements
5351da177e4SLinus Torvalds
536ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
537ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
538ae63b2d7SPrarit Bhargava			  -prune -o
539450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
540450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
5411da177e4SLinus Torvalds
5421da177e4SLinus Torvalds# ===========================================================================
5431da177e4SLinus Torvalds# Rules shared between *config targets and build targets
5441da177e4SLinus Torvalds
545312a3d09SCao jin# Basic helpers built in scripts/basic/
5464f193362SPaul SmithPHONY += scripts_basic
5471da177e4SLinus Torvaldsscripts_basic:
5481da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
549638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
5501da177e4SLinus Torvalds
5514f193362SPaul SmithPHONY += outputmakefile
5522728fcfaSMasahiro Yamadaifdef building_out_of_srctree
553e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
554fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
555fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
556fd5f0cd6SJan Beulich# output directory.
5573a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5583a51ff34SVladimir Kondratiev# ignore whole output directory
5592728fcfaSMasahiro Yamada
5602728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN     Makefile
5612728fcfaSMasahiro Yamada      cmd_makefile = { \
5622728fcfaSMasahiro Yamada	echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
5632728fcfaSMasahiro Yamada	echo "include $(srctree)/Makefile"; \
5642728fcfaSMasahiro Yamada	} > Makefile
5652728fcfaSMasahiro Yamada
5661da177e4SLinus Torvaldsoutputmakefile:
567e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
568e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
569e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
570e8e83a23SMasahiro Yamada		echo >&2 "***"; \
571e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
572e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
573e8e83a23SMasahiro Yamada		echo >&2 "***"; \
574e8e83a23SMasahiro Yamada		false; \
575e8e83a23SMasahiro Yamada	fi
57692979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5772728fcfaSMasahiro Yamada	$(call cmd,makefile)
578156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
579156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
580fd5f0cd6SJan Beulichendif
5811da177e4SLinus Torvalds
582db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
583db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
584db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
585db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade.
5866e0839fdSMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell $(CC) --version 2>/dev/null | head -n 1))
587db07562aSNick Desaulniers
588db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
589ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
5905241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
591ae6b289aSChris Friesendif
592ba64beb1SMasahiro Yamadaifeq ($(LLVM_IAS),1)
593ba64beb1SMasahiro YamadaCLANG_FLAGS	+= -integrated-as
594ba64beb1SMasahiro Yamadaelse
595238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
596ae6b289aSChris FriesGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
597ae6b289aSChris FriesCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
598876a0600SNathan Chancellorendif
599589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
600238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
601238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
6023bd98050SJoel Stanleyexport CLANG_FLAGS
603ae6b289aSChris Friesendif
604ae6b289aSChris Fries
60557fd251cSMasahiro Yamada# Include this also for config targets because some architectures need
60657fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE.
607805b2e1dSMasahiro Yamadaifdef need-compiler
60857fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler
609805b2e1dSMasahiro Yamadaendif
61057fd251cSMasahiro Yamada
6112042b548SMasahiro Yamadaifdef config-build
6121da177e4SLinus Torvalds# ===========================================================================
6131da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
6141da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
6151da177e4SLinus Torvalds
6161da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
6171da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
6181da177e4SLinus Torvalds# used for 'make defconfig'
6193204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
620315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
6211da177e4SLinus Torvalds
62236de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
62331110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
62431110ebbSSam Ravnborg
62536de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
6261da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
6271da177e4SLinus Torvalds
6282042b548SMasahiro Yamadaelse #!config-build
6291da177e4SLinus Torvalds# ===========================================================================
6301da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
6311da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
6321da177e4SLinus Torvalds
6332c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
634121c2a13SMasahiro Yamada# but instead __all depend on modules
6352c1f4f12SMasahiro YamadaPHONY += all
6362c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
637121c2a13SMasahiro Yamada__all: all
6382c1f4f12SMasahiro Yamadaelse
639121c2a13SMasahiro Yamada__all: modules
6402c1f4f12SMasahiro Yamadaendif
6412c1f4f12SMasahiro Yamada
6422c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
6432c1f4f12SMasahiro Yamada# Normally, just do built-in.
6442c1f4f12SMasahiro Yamada
6452c1f4f12SMasahiro YamadaKBUILD_MODULES :=
6462c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
6472c1f4f12SMasahiro Yamada
6482c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
6492c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
6504b50c8c4SMasahiro Yamada  KBUILD_BUILTIN :=
6512c1f4f12SMasahiro Yamadaendif
6522c1f4f12SMasahiro Yamada
6532c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
6542c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
6552c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
6562c1f4f12SMasahiro Yamada
6576ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
6582c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6592c1f4f12SMasahiro Yamadaendif
6602c1f4f12SMasahiro Yamada
6612c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6622c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6632c1f4f12SMasahiro Yamadaendif
6642c1f4f12SMasahiro Yamada
6652c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6662c1f4f12SMasahiro Yamada
6672042b548SMasahiro Yamadaifdef need-config
668d93a18f2SMasahiro Yamadainclude include/config/auto.conf
669d93a18f2SMasahiro Yamadaendif
670d93a18f2SMasahiro Yamada
6711da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6721da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
673d92cc4d5SMasahiro Yamadacore-y		:= init/ usr/ arch/$(SRCARCH)/
674f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
675d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
6768b5f4eb3SMasahiro Yamadadrivers-$(CONFIG_NET) += net/
6778b5f4eb3SMasahiro Yamadadrivers-y	+= virt/
6781da177e4SLinus Torvaldslibs-y		:= lib/
6791da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6801da177e4SLinus Torvalds
681315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
682315bab4eSMasahiro Yamada# command line.
683315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
684315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
685315bab4eSMasahiro Yamadaall: vmlinux
686315bab4eSMasahiro Yamada
687315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
688315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
689315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
6905aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
691315bab4eSMasahiro Yamada
692b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
693b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
694b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
695b1f4ff74SPaulo Zanoniendif
696b1f4ff74SPaulo Zanoni
697669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
698669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
699669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
700669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
701669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
702669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
703669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
704669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
705669e06b1SMasahiro Yamada
7063204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
707315bab4eSMasahiro Yamada
7082042b548SMasahiro Yamadaifdef need-config
7092042b548SMasahiro Yamadaifdef may-sync-config
710315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
711315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
712315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
713d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
7141da177e4SLinus Torvalds
71505850719SMasahiro Yamada$(KCONFIG_CONFIG):
71605850719SMasahiro Yamada	@echo >&2 '***'
71705850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
71805850719SMasahiro Yamada	@echo >&2 '***'
71905850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
72005850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
72105850719SMasahiro Yamada	@echo >&2 '***'
72205850719SMasahiro Yamada	@/bin/false
7231da177e4SLinus Torvalds
72461277981SUlf Magnusson# The actual configuration files used during the build are stored in
72561277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
72661277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
7279390dff6SMasahiro Yamada#
7289390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
7299390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
730f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
731*d952cfafSMasahiro Yamada#
732*d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
733*d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input.
7343044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
735*d952cfafSMasahiro Yamada	$(Q)$(kecho) "  SYNC    $@"
736*d952cfafSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
7372042b548SMasahiro Yamadaelse # !may-sync-config
738d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
739d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
740d7942413SMasahiro Yamada# Use auto.conf to trigger the test
7419ee4e336SSam RavnborgPHONY += include/config/auto.conf
7429ee4e336SSam Ravnborg
7439ee4e336SSam Ravnborginclude/config/auto.conf:
744264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
7455369f550SMichal Marek	echo >&2;							\
7465369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
7475369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
7485369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
7495369f550SMichal Marek	echo >&2 ;							\
7509ee4e336SSam Ravnborg	/bin/false)
7519ee4e336SSam Ravnborg
752d7942413SMasahiro Yamadaendif # may-sync-config
7532042b548SMasahiro Yamadaendif # need-config
7541da177e4SLinus Torvalds
755a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
756ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
757bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
758bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7596f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
760a1c48bb1SGeert Uytterhoeven
76115f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
762a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
76315f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
76415f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
76515f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
76615f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
7671da177e4SLinus Torvaldsendif
7681da177e4SLinus Torvalds
76969102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
77069102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
771b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
77269102311SJiri Kosina
7731873e870SAndi Kleenifdef CONFIG_READABLE_ASM
7741873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
7751873e870SAndi Kleen# reorder blocks reorders the control in the function
7761873e870SAndi Kleen# ipa clone creates specialized cloned functions
7771873e870SAndi Kleen# partial inlining inlines only parts of functions
7781873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
7791873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
7801873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
7811873e870SAndi Kleenendif
7821873e870SAndi Kleen
78308f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
784a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
78535bb5b1eSAndi Kleenendif
78635bb5b1eSAndi Kleen
787893ab004SMasahiro Yamadastackp-flags-y                                    := -fno-stack-protector
788050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
789050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
7902a61f474SMasahiro Yamada
7912a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
792e06b8b98SSam Ravnborg
793076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
794a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
795a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
796a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
797cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
798cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
799cfe17c9bSMasahiro Yamada# See modpost pattern 2
800a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
801cfe17c9bSMasahiro Yamadaelse
802cfe17c9bSMasahiro Yamada
803e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
804e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
805e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
806e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
807cfe17c9bSMasahiro Yamadaendif
808cfe17c9bSMasahiro Yamada
809885480b0SNathan Chancellor# These warnings generated too much noise in a regular build.
810885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
811885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
812885480b0SNathan Chancellor
8130a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
8141da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
815a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
8161da177e4SLinus Torvaldselse
8177e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
8187e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
8197e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
8207e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
8217e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
8227e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
823a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
8241da177e4SLinus Torvaldsendif
8257e9501fdSRabin Vincentendif
8261da177e4SLinus Torvalds
827f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern.
828f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN
829709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
830709a972eSKees Cookendif
831709a972eSKees Cook
832f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value.
833f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO
834f0fe00d4Sglider@google.com# Future support for zero initialization is still being debated, see
835f0fe00d4Sglider@google.com# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
836f0fe00d4Sglider@google.com# renamed or dropped.
837f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
838f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
839f0fe00d4Sglider@google.comendif
840f0fe00d4Sglider@google.com
84139218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes
84239218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers.
84339218ff4SKees CookKBUILD_CFLAGS	+= $(call cc-option, -fno-stack-clash-protection)
84439218ff4SKees Cook
845315da87cSMasahiro YamadaDEBUG_CFLAGS	:=
846315da87cSMasahiro Yamada
847121c5d08SMark Wielaard# Workaround for GCC versions < 5.0
848121c5d08SMark Wielaard# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
849121c5d08SMark Wielaardifdef CONFIG_CC_IS_GCC
850315da87cSMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
851121c5d08SMark Wielaardendif
8522062afb4SLinus Torvalds
8531da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
854695afd3dSSedat Dilek
855866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
8569d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
857866ced95SAndi Kleenelse
8581e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
859866ced95SAndi Kleenendif
860695afd3dSSedat Dilek
861b8a90923SNick Desaulniersifneq ($(LLVM_IAS),1)
8622288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
863b8a90923SNick Desaulniersendif
864695afd3dSSedat Dilek
865a66049e2SNick Desaulniersifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
866a66049e2SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
86798cd6f52SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
868a66049e2SNick DesaulniersDEBUG_CFLAGS	+= -gdwarf-$(dwarf-version-y)
869bfaf2dd3SAndi Kleenendif
8701da177e4SLinus Torvalds
871d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
8721e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
873e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
874d6f4ceb7SAndi Kleenendif
875d6f4ceb7SAndi Kleen
87610e68b02SNick Desaulniersifdef CONFIG_DEBUG_INFO_COMPRESSED
87710e68b02SNick DesaulniersDEBUG_CFLAGS	+= -gz=zlib
8787b169944SArvind SankarKBUILD_AFLAGS	+= -gz=zlib
87910e68b02SNick DesaulniersKBUILD_LDFLAGS	+= --compress-debug-sections=zlib
88010e68b02SNick Desaulniersendif
88110e68b02SNick Desaulniers
882695afd3dSSedat Dilekendif # CONFIG_DEBUG_INFO
883695afd3dSSedat Dilek
8841e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
8851e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
8861e88e415SMasahiro Yamada
887606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
8883b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC
88907d04081SVasily Gorbik  CC_FLAGS_FTRACE	+= -mrecord-mcount
8902f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8912f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8922f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8932f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8942f4df001SVasily Gorbik    endif
8952f4df001SVasily Gorbik  endif
89607d04081SVasily Gorbikendif
89722c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
89822c8542dSSami Tolvanen  CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
89922c8542dSSami Tolvanenendif
9003b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
9013b15cdc1SSami Tolvanen  ifdef CONFIG_HAVE_C_RECORDMCOUNT
9023b15cdc1SSami Tolvanen    BUILD_C_RECORDMCOUNT := y
9033b15cdc1SSami Tolvanen    export BUILD_C_RECORDMCOUNT
9043b15cdc1SSami Tolvanen  endif
9053b15cdc1SSami Tolvanenendif
906a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
907f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
908f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
909f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
910a2546faeSSteven Rostedt  endif
911f28bc3c3SVasily Gorbikendif
912f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
913f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
914f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
91516444a8aSArnaldo Carvalho de Meloendif
91616444a8aSArnaldo Carvalho de Melo
91791341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
91891341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
91991341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
92091341d4bSSam Ravnborgendif
92191341d4bSSam Ravnborg
92290ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
923e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
924e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
92590ad4052SMasahiro Yamadaendif
92690ad4052SMasahiro Yamada
927d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK
928d08b9f0cSSami TolvanenCC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
929d08b9f0cSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
930d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS
931d08b9f0cSSami Tolvanenendif
932d08b9f0cSSami Tolvanen
933dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG
934dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN
9352b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto=thin -fsplit-lto-unit
9367f69180bSMasahiro YamadaKBUILD_LDFLAGS	+= --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
937dc5723b0SSami Tolvanenelse
9382b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto
939dc5723b0SSami Tolvanenendif
940dc5723b0SSami TolvanenCC_FLAGS_LTO	+= -fvisibility=hidden
94122d429e7SSami Tolvanen
94222d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size
94322d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5
94424845dcbSNick Desaulniers
9450236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion
9460236526dSTor Vic# when using lld < 13.0.0.
94724845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0)
9480236526dSTor Vicifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
94924845dcbSNick DesaulniersKBUILD_LDFLAGS	+= -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
95024845dcbSNick Desaulniersendif
951dc5723b0SSami Tolvanenendif
9520236526dSTor Vicendif
953dc5723b0SSami Tolvanen
954dc5723b0SSami Tolvanenifdef CONFIG_LTO
9555e95325fSSami TolvanenKBUILD_CFLAGS	+= -fno-lto $(CC_FLAGS_LTO)
9565e95325fSSami TolvanenKBUILD_AFLAGS	+= -fno-lto
957dc5723b0SSami Tolvanenexport CC_FLAGS_LTO
958dc5723b0SSami Tolvanenendif
959dc5723b0SSami Tolvanen
960cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG
961cf68fffbSSami TolvanenCC_FLAGS_CFI	:= -fsanitize=cfi \
962cf68fffbSSami Tolvanen		   -fsanitize-cfi-cross-dso \
963cf68fffbSSami Tolvanen		   -fno-sanitize-cfi-canonical-jump-tables \
964cf68fffbSSami Tolvanen		   -fno-sanitize-trap=cfi \
965cf68fffbSSami Tolvanen		   -fno-sanitize-blacklist
966cf68fffbSSami Tolvanen
967cf68fffbSSami Tolvanenifdef CONFIG_CFI_PERMISSIVE
968cf68fffbSSami TolvanenCC_FLAGS_CFI	+= -fsanitize-recover=cfi
969cf68fffbSSami Tolvanenendif
970cf68fffbSSami Tolvanen
971cf68fffbSSami Tolvanen# If LTO flags are filtered out, we must also filter out CFI.
972cf68fffbSSami TolvanenCC_FLAGS_LTO	+= $(CC_FLAGS_CFI)
973cf68fffbSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_CFI)
974cf68fffbSSami Tolvanenexport CC_FLAGS_CFI
975cf68fffbSSami Tolvanenendif
976cf68fffbSSami Tolvanen
977cf536e18SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B
978cf536e18SFeng TangKBUILD_CFLAGS += -falign-functions=64
97909c60546SFeng Tangendif
98009c60546SFeng Tang
981e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
982e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
983e8e69931SSam Ravnborg
9841da177e4SLinus Torvalds# warn about C99 declaration after statement
985a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
9861da177e4SLinus Torvalds
9870bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
9888289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
9890bb95f80SKees Cook
990070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
991fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
9921da177e4SLinus Torvalds
993217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
994217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
995217c3e01SStephen Rothwell
9965c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
9975c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
99844720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
9995a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
10005c45de21SLinus Torvalds
1001adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
1002adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
1003adc71920SLinus Torvalds
100478a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
100578a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
100678a5255fSLinus Torvalds
1007fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
10088b42cf2fSMasahiro YamadaKBUILD_CFLAGS	+= -fno-strict-overflow
1009d0115552SLinus Torvalds
10103ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
10117d4eb0d8SMasahiro YamadaKBUILD_CFLAGS  += -fno-stack-check
10123ce120b1SLinus Torvalds
10138f7f5c9fSAndi Kleen# conserve stack if available
10148f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
10158f7f5c9fSAndi Kleen
1016fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
101787de84c9SMasahiro YamadaKBUILD_CFLAGS   += -Werror=date-time
1018fe7c36c7SJosh Triplett
1019ea8daa7bSDaniel Wagner# enforce correct pointer usage
1020ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
1021ea8daa7bSDaniel Wagner
1022c834f0e8SKees Cook# Require designated initializers for all marked structures
1023c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
1024c834f0e8SKees Cook
1025a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
1026a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1027a73619a8SMasahiro Yamada
1028e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed
1029e0fe0bbeSMasahiro Yamadainclude-y			:= scripts/Makefile.extrawarn
1030e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
1031e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
1032e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN)		+= scripts/Makefile.ubsan
1033e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV)		+= scripts/Makefile.kcov
1034e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS)	+= scripts/Makefile.gcc-plugins
1035e0fe0bbeSMasahiro Yamada
1036e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y))
1037a86fe353SMasahiro Yamada
1038132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last.
1039132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel
1040132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point.
1041bf5438fcSJason Baron
10428cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
10438cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
10448cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
10458cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
104652bcc330SSam Ravnborg
1047a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1
1048a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1
104918991197SRoland McGrath
10505d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1051d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
10525d7d18f5SDavid Howellsendif
10535d7d18f5SDavid Howells
10545cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
105527f2a4dbSNick DesaulniersLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr --use-android-relr-tags
10565cf896fbSPeter Collingbourneendif
10575cf896fbSPeter Collingbourne
105859612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the
105959612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script.
106059612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN
106159612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn
106259612b24SNathan Chancellorendif
106359612b24SNathan Chancellor
10647f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
10657f58b487SMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10667f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10677f3a59dbSMasahiro Yamada
106880591e61SLuc Van Oostenryck# make the checker run with the right architecture
106980591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
107080591e61SLuc Van Oostenryck
107114516765SLuc Van Oostenryck# insure the checker run with the right endianness
107214516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
107314516765SLuc Van Oostenryck
10741f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
10751f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
10761f2f01b1SLuc Van Oostenryck
10771da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
10781da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
10791da177e4SLinus Torvalds# set in the environment
10801da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
10811da177e4SLinus Torvalds# this default value
10821da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
10831da177e4SLinus Torvalds
10841da177e4SLinus Torvalds#
10851da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
10861da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
10871da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
10881da177e4SLinus Torvalds
10891da177e4SLinus Torvalds#
1090f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1091f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1092f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
1093f4d4ffc0SJason Cooper#
1094f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1095f4d4ffc0SJason Cooper
1096f4d4ffc0SJason Cooper#
10971da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
10981da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
1099070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
11001da177e4SLinus Torvalds#
11011da177e4SLinus Torvalds
1102df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
11031da177e4SLinus Torvaldsexport MODLIB
11041da177e4SLinus Torvalds
1105e00d8880SMasahiro YamadaPHONY += prepare0
1106e2a666d5SRusty Russell
1107ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
11087f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order
11097f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
111047801c97SMasahiro Yamada
11111da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1112cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
11131da177e4SLinus Torvalds
111423febe37SMasahiro Yamadavmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
11151da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
111695fb6317SMasahiro Yamada		     $(libs-y) $(libs-m)))
11171da177e4SLinus Torvalds
11181eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
111923febe37SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(core-) \
112095fb6317SMasahiro Yamada			$(drivers-) $(libs-))))
11211da177e4SLinus Torvalds
1122b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \
1123b2c88554SMasahiro Yamada			$(core-y) $(core-m) $(libs-y) $(libs-m) \
1124b2c88554SMasahiro Yamada			$(drivers-y) $(drivers-m)))
11251da177e4SLinus Torvalds
1126c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
112776cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1128c99f3918SMasahiro Yamada
11291f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1130f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1131f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1132f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES
1133f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1134f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1135f0d50ca0SMasahiro Yamadaelse
1136f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1137f0d50ca0SMasahiro Yamadaendif
1138f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1139f0d50ca0SMasahiro Yamada
1140f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
114195698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
114285f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1143233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
11441da177e4SLinus Torvalds
1145d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
11461da177e4SLinus Torvalds
11473fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
11483fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
11492441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
11501f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
11511f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
11521f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
11531f50b80aSMasahiro YamadaKBUILD_MODULES := 1
1154fb2d99beSMasahiro Yamada
1155fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order
1156fb2d99beSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1157fb2d99beSMasahiro Yamada	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
11581f50b80aSMasahiro Yamadaendif
11591f50b80aSMasahiro Yamada
116007a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
116107a422bbSMasahiro Yamada
116288694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
116388694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
116488694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
116588694cffSQuentin Perret
116607a422bbSMasahiro Yamada$(autoksyms_h):
116788694cffSQuentin Perret	$(call cmd,autoksyms_h)
116823121ca2SNicolas Pitre
1169fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1170fbe6e37dSNicholas Piggin
1171fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1172fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
11733ec8a5b3SMasahiro Yamada	$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";    \
1174fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
11752441e78bSNicolas Pitre
11763fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
11770b956e20SRasmus Villemoes	+$(call if_changed_dep,link-vmlinux)
1178741f98feSSam Ravnborg
1179392885eeSMasahiro Yamadatargets := vmlinux
1180392885eeSMasahiro Yamada
11811da177e4SLinus Torvalds# The actual objects are generated when descending,
11821da177e4SLinus Torvalds# make sure no implicit rule kicks in
1183b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
11841da177e4SLinus Torvalds
1185ba97df45SMasahiro Yamadafilechk_kernel.release = \
11860d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
11870d0e7718SMichal Marek
118883a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
118924512795SMasahiro Yamadainclude/config/kernel.release: FORCE
11900d0e7718SMichal Marek	$(call filechk,kernel.release)
1191cb58455cSSam Ravnborg
1192d8821622SMasahiro Yamada# Additional helpers built in scripts/
1193d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1194d8821622SMasahiro Yamada# in parallel
1195d8821622SMasahiro YamadaPHONY += scripts
119660df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1197d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1198cb58455cSSam Ravnborg
11991da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
12005bb78269SSam Ravnborg# or the modules are listed in "prepare".
12015bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
12025bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
12035bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
12041da177e4SLinus Torvalds
1205a5139fb3SMasahiro YamadaPHONY += prepare archprepare
12065bb78269SSam Ravnborg
120736de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
12083044dd05SMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
12091476fee5SMasahiro Yamada	include/generated/autoconf.h remove-stale-files
12105bb78269SSam Ravnborg
121165bba042SMasahiro Yamadaprepare0: archprepare
121260df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
12138d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
121486feeaa8SSam Ravnborg
12151da177e4SLinus Torvalds# All the preparing..
12160d989ac2SMasahiro Yamadaprepare: prepare0
1217b9ab5ebbSJosh Poimboeuf
12181476fee5SMasahiro YamadaPHONY += remove-stale-files
12191476fee5SMasahiro Yamadaremove-stale-files:
12201476fee5SMasahiro Yamada	$(Q)$(srctree)/scripts/remove-stale-files
12211476fee5SMasahiro Yamada
12222c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
12237d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
12247d0e5c20SMasahiro Yamada
12252c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
12262c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1227037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1228037fc336SMasahiro Yamada	generic=include/asm-generic
12292c1f4f12SMasahiro Yamadauapi-asm-generic:
1230037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1231037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
12322c1f4f12SMasahiro Yamada
12331da177e4SLinus Torvalds# Generate some files
12341da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12351da177e4SLinus Torvalds
12361da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
12371da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
12381da177e4SLinus Torvalds
12391da177e4SLinus Torvaldsuts_len := 64
124063104eecSSam Ravnborgdefine filechk_utsrelease.h
12411da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
12421da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
12431da177e4SLinus Torvalds	  exit 1;                                                         \
12441da177e4SLinus Torvalds	fi;                                                               \
1245ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
12461da177e4SLinus Torvaldsendef
12471da177e4SLinus Torvalds
124863104eecSSam Ravnborgdefine filechk_version.h
12499b82f13eSSasha Levin	if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1250ad774086SMasahiro Yamada		echo \#define LINUX_VERSION_CODE $(shell                 \
1251207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
12529b82f13eSSasha Levin	else                                                             \
12539b82f13eSSasha Levin		echo \#define LINUX_VERSION_CODE $(shell                 \
1254207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
12559b82f13eSSasha Levin	fi;                                                              \
12569b82f13eSSasha Levin	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
125788a68672SSasha Levin	((c) > 255 ? 255 : (c)))';                                       \
125888a68672SSasha Levin	echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
125988a68672SSasha Levin	echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
126088a68672SSasha Levin	echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
126163104eecSSam Ravnborgendef
126263104eecSSam Ravnborg
1263207da4c8SMasahiro Yamada$(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1264207da4c8SMasahiro Yamada$(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
126543fee2b2SMasahiro Yamada$(version_h): FORCE
12661da177e4SLinus Torvalds	$(call filechk,version.h)
12671da177e4SLinus Torvalds
1268273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
126963104eecSSam Ravnborg	$(call filechk,utsrelease.h)
127063104eecSSam Ravnborg
1271179efcb4SVegard NossumPHONY += headerdep
1272179efcb4SVegard Nossumheaderdep:
12739663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
12749663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1275179efcb4SVegard Nossum
12761da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12778d730cfbSDavid Woodhouse# Kernel headers
12788d730cfbSDavid Woodhouse
1279e6883b18SSam Ravnborg#Default location for installed headers
1280e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1281e6883b18SSam Ravnborg
128259b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
128359b2bd05SMasahiro Yamada      cmd_headers_install = \
128459b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
128559b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
128659b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
12876d716275SDavid Woodhouse
12888d730cfbSDavid WoodhousePHONY += headers_install
128959b2bd05SMasahiro Yamadaheaders_install: headers
129059b2bd05SMasahiro Yamada	$(call cmd,headers_install)
12914f193362SPaul Smith
12921da177e4SLinus TorvaldsPHONY += archheaders archscripts
12931da177e4SLinus Torvalds
1294a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
12951da177e4SLinus Torvalds
129659b2bd05SMasahiro YamadaPHONY += headers
129759b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
12989d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
12992fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1300d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1301d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
13021f85712eSMike Frysinger
13037ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
130468475359SDavid WoodhousePHONY += headers_check
13057ecaf069SMasahiro Yamadaheaders_check:
1306609bbb4dSMasahiro Yamada	@echo >&2 "=================== WARNING ==================="
1307609bbb4dSMasahiro Yamada	@echo >&2 "Since Linux 5.5, 'make headers_check' is no-op,"
1308609bbb4dSMasahiro Yamada	@echo >&2 "and will be removed after Linux 5.15 release."
1309609bbb4dSMasahiro Yamada	@echo >&2 "Please remove headers_check from your scripts."
1310609bbb4dSMasahiro Yamada	@echo >&2 "==============================================="
131168475359SDavid Woodhouse
1312e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
131359b2bd05SMasahiro Yamadaprepare: headers
1314e949f4c2SMasahiro Yamadaendif
13151da177e4SLinus Torvalds
1316bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1317bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1318bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1319bdd7714bSMasahiro Yamada
13201da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13211bb0b18aSMasahiro Yamada# Tools
13221bb0b18aSMasahiro Yamada
13230d989ac2SMasahiro Yamadaifdef CONFIG_STACK_VALIDATION
13240d989ac2SMasahiro Yamadaprepare: tools/objtool
13250d989ac2SMasahiro Yamadaendif
13260d989ac2SMasahiro Yamada
13270d989ac2SMasahiro Yamadaifdef CONFIG_BPF
13280d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF
13290d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids
13300d989ac2SMasahiro Yamadaendif
13310d989ac2SMasahiro Yamadaendif
13320d989ac2SMasahiro Yamada
13330d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean
13340d989ac2SMasahiro Yamada
13350d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
13360d989ac2SMasahiro Yamada
13370d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist
13380d989ac2SMasahiro Yamada# in output directory, skip its clean in that case
13390d989ac2SMasahiro Yamadaresolve_btfids_clean:
13400d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),)
13410d989ac2SMasahiro Yamada	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
13420d989ac2SMasahiro Yamadaendif
13430d989ac2SMasahiro Yamada
13441bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake
13451bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_)
13461bb0b18aSMasahiro Yamadatools_silent=s
13471bb0b18aSMasahiro Yamadaendif
13481bb0b18aSMasahiro Yamada
13491bb0b18aSMasahiro Yamadatools/: FORCE
13501bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
13511bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
13521bb0b18aSMasahiro Yamada
13531bb0b18aSMasahiro Yamadatools/%: FORCE
13541bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
13551bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
13561bb0b18aSMasahiro Yamada
13571bb0b18aSMasahiro Yamada# ---------------------------------------------------------------------------
13585a5da78bSShuah Khan# Kernel selftest
13595a5da78bSShuah Khan
13605a5da78bSShuah KhanPHONY += kselftest
13615a5da78bSShuah Khankselftest:
13622bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
13635a5da78bSShuah Khan
136417eac6c2SShuah Khankselftest-%: FORCE
136517eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1366dcb825a9SWang Long
13673d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
13683d6dee7aSBamvor Jian Zhangkselftest-merge:
13693d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
13706d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
13716d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
13723e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
13733d6dee7aSBamvor Jian Zhang
13745a5da78bSShuah Khan# ---------------------------------------------------------------------------
137537c8a5faSRob Herring# Devicetree files
137637c8a5faSRob Herring
137737c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
137837c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
137937c8a5faSRob Herringendif
138037c8a5faSRob Herring
138137c8a5faSRob Herringifneq ($(dtstree),)
138237c8a5faSRob Herring
1383a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
138437c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
138537c8a5faSRob Herring
1386ce88c9c7SViresh Kumar%.dtbo: include/config/kernel.release scripts_dtc
1387ce88c9c7SViresh Kumar	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1388ce88c9c7SViresh Kumar
1389c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1390b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
139137c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
139237c8a5faSRob Herring
1393b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1394e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1395b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1396b5154bf6SMasahiro Yamadaendif
1397b5154bf6SMasahiro Yamada
1398b5154bf6SMasahiro Yamadadtbs_check: dtbs
13994f0e3a57SRob Herring
140037c8a5faSRob Herringdtbs_install:
14012431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
140237c8a5faSRob Herring
140337c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
140437c8a5faSRob Herringall: dtbs
140537c8a5faSRob Herringendif
140637c8a5faSRob Herring
140737c8a5faSRob Herringendif
140837c8a5faSRob Herring
140937c8a5faSRob HerringPHONY += scripts_dtc
141037c8a5faSRob Herringscripts_dtc: scripts_basic
141137c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
141237c8a5faSRob Herring
1413e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1414e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1415e10c4321SMasahiro Yamadaendif
1416e10c4321SMasahiro Yamada
1417c473a8d0SMasahiro YamadaPHONY += dt_binding_check
14184f0e3a57SRob Herringdt_binding_check: scripts_dtc
14194f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
14204f0e3a57SRob Herring
142137c8a5faSRob Herring# ---------------------------------------------------------------------------
14221da177e4SLinus Torvalds# Modules
14231da177e4SLinus Torvalds
14241da177e4SLinus Torvaldsifdef CONFIG_MODULES
14251da177e4SLinus Torvalds
14261da177e4SLinus Torvalds# By default, build modules as well
14271da177e4SLinus Torvalds
142873d1393eSMichal Marekall: modules
14291da177e4SLinus Torvalds
14304b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider
14314b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to
14324b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them.
14334b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS
14344b50c8c4SMasahiro Yamada  KBUILD_BUILTIN := 1
14354b50c8c4SMasahiro Yamadaendif
14364b50c8c4SMasahiro Yamada
14371da177e4SLinus Torvalds# Build modules
1438551559e1STejun Heo#
1439551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1440551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1441551559e1STejun Heo# using awk while concatenating to the final file.
14421da177e4SLinus Torvalds
14434f193362SPaul SmithPHONY += modules
1444596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
14451da177e4SLinus Torvalds
1446b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1447b2c88554SMasahiro Yamada
1448b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE
1449b2c88554SMasahiro Yamada	$(call if_changed,modules_order)
1450b2c88554SMasahiro Yamada
1451b2c88554SMasahiro Yamadatargets += modules.order
1452a6c36632SMichal Marek
14531da177e4SLinus Torvalds# Target to prepare building external modules
14544f193362SPaul SmithPHONY += modules_prepare
1455059bc9fcSMasahiro Yamadamodules_prepare: prepare
1456596b0474SMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
14571da177e4SLinus Torvalds
1458961ab4a3SMasahiro Yamadaexport modules_sign_only :=
14591da177e4SLinus Torvalds
1460961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y)
1461961ab4a3SMasahiro YamadaPHONY += modules_sign
1462961ab4a3SMasahiro Yamadamodules_sign: modules_install
1463961ab4a3SMasahiro Yamada	@:
1464961ab4a3SMasahiro Yamada
1465961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install.
1466961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1467961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),)
1468961ab4a3SMasahiro Yamadamodules_sign_only := y
1469961ab4a3SMasahiro Yamadaendif
1470961ab4a3SMasahiro Yamadaendif
1471961ab4a3SMasahiro Yamada
1472961ab4a3SMasahiro Yamadamodinst_pre :=
1473961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),)
1474961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre
1475961ab4a3SMasahiro Yamadaendif
1476961ab4a3SMasahiro Yamada
1477961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre)
14783e3005dfSMasahiro YamadaPHONY += __modinst_pre
14793e3005dfSMasahiro Yamada__modinst_pre:
14801da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
14811da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
14821da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
14838e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
14841da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
14851da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
14867e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
14871da177e4SLinus Torvalds	fi
14881bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
14892c6d9636SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
14902c6d9636SMasahiro Yamada	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
14911da177e4SLinus Torvalds
14921da177e4SLinus Torvaldsendif # CONFIG_MODULES
14931da177e4SLinus Torvalds
14941da177e4SLinus Torvalds###
14951da177e4SLinus Torvalds# Cleaning is done on three levels.
14961da177e4SLinus Torvalds# make clean     Delete most generated files
14971da177e4SLinus Torvalds#                Leave enough to build external modules
14981da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
14991da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
15001da177e4SLinus Torvalds
15011da177e4SLinus Torvalds# Directories & files removed with 'make clean'
150269bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
15033d32285fSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps \
15044c7858b9SMasahiro Yamada	       compile_commands.json .thinlto-cache
15051da177e4SLinus Torvalds
15061da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
15070663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
150846a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
15090663c68cSMasahiro Yamada		  debian snap tar-install \
15100663c68cSMasahiro Yamada		  .config .config.old .version \
151146457133SMasahiro Yamada		  Module.symvers \
1512b31f2a49SNayna Jain		  certs/signing_key.pem certs/signing_key.x509 \
1513b31f2a49SNayna Jain		  certs/x509.genkey \
1514b31f2a49SNayna Jain		  vmlinux-gdb.py \
151546a63d4bSMasahiro Yamada		  *.spec
15161da177e4SLinus Torvalds
15171da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
15181da177e4SLinus Torvalds#
15191da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
15201da177e4SLinus Torvalds
152176cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
15221da177e4SLinus Torvalds
1523bd1ee804SPawel Mollvmlinuxclean:
1524bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1525fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1526bd1ee804SPawel Moll
152750d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean
15281da177e4SLinus Torvalds
15291da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
15301da177e4SLinus Torvalds#
15311da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1532cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
15331da177e4SLinus Torvalds
1534b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
15351da177e4SLinus Torvalds$(mrproper-dirs):
15361da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
15371da177e4SLinus Torvalds
1538b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
15391da177e4SLinus Torvalds	$(call cmd,rmfiles)
15401da177e4SLinus Torvalds
15411da177e4SLinus Torvalds# distclean
15421da177e4SLinus Torvalds#
15434f193362SPaul SmithPHONY += distclean
15441da177e4SLinus Torvalds
15451da177e4SLinus Torvaldsdistclean: mrproper
154619c8d912SMasahiro Yamada	@find . $(RCS_FIND_IGNORE) \
15471da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1548f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
15497a02cec5SMasahiro Yamada		-o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
15507a02cec5SMasahiro Yamada		-o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
15511da177e4SLinus Torvalds		-type f -print | xargs rm -f
15521da177e4SLinus Torvalds
15531da177e4SLinus Torvalds
15541da177e4SLinus Torvalds# Packaging of the kernel to various formats
15551da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15561da177e4SLinus Torvalds
1557bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1558000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1559031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1560000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
15611da177e4SLinus Torvalds
15621da177e4SLinus Torvalds# Brief documentation of the typical targets used
15631da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15641da177e4SLinus Torvalds
15655dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1566a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
15675dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
15685dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
15691da177e4SLinus Torvalds
1570fe69b420SMasahiro YamadaPHONY += help
15711da177e4SLinus Torvaldshelp:
15721da177e4SLinus Torvalds	@echo  'Cleaning targets:'
15735ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
15745cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
15755ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
15765cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
15771da177e4SLinus Torvalds	@echo  ''
15781da177e4SLinus Torvalds	@echo  'Configuration targets:'
15791da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
15801da177e4SLinus Torvalds	@echo  ''
15811da177e4SLinus Torvalds	@echo  'Other generic targets:'
15821da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
15831da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
15841da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
15859cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
15861da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
158740ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1588433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1589433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
159062718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
159162718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1592155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1593c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
15941da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
15951da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1596f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
15973f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
15983f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
15993f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
16002fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
160159df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
16022fb9b1bdSSam Ravnborg	 echo  ''
160331b8cc80SRandy Dunlap	@echo  'Static analysers:'
16041da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1605aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1606ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1607295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
160874425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
16097f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
16106ad7cbc0SNathan Huckleberry	@echo  '  clang-analyzer  - Check with clang static analyzer'
16116ad7cbc0SNathan Huckleberry	@echo  '  clang-tidy      - Check with clang-tidy'
161274425eeeSNicolas Palix	@echo  ''
1613eb8305aeSMatthias Maennich	@echo  'Tools:'
1614eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1615eb8305aeSMatthias Maennich	@echo  ''
161631b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1617e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
16185a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
16195a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1620e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1621e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1622e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1623dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1624e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1625e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
16265a5da78bSShuah Khan	@echo  ''
162737c8a5faSRob Herring	@$(if $(dtstree), \
162837c8a5faSRob Herring		echo 'Devicetree:'; \
162937c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
163037c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
16317aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
16327aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
163337c8a5faSRob Herring		echo '')
163437c8a5faSRob Herring
163531b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
163631b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
163731b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
163831b8cc80SRandy Dunlap	@echo  ''
16391da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1640000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
16411da177e4SLinus Torvalds	@echo  ''
16421da177e4SLinus Torvalds	@echo  'Documentation targets:'
1643cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
16441da177e4SLinus Torvalds	@echo  ''
164501dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
16461da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
164701dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
16481da177e4SLinus Torvalds	@echo  ''
16491da177e4SLinus Torvalds	@$(if $(boards), \
16501da177e4SLinus Torvalds		$(foreach b, $(boards), \
16514234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
16521da177e4SLinus Torvalds		echo '')
16535dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
16545dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
16555dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
16565dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
16575dffbe81SSegher Boessenkool		echo '')
16581da177e4SLinus Torvalds
16591da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
166045d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
16611da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1662a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1663a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1664701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1665af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1666e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
166728bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
166828bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
166928bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1670a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
16711da177e4SLinus Torvalds	@echo  ''
16721da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
16731da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
16741da177e4SLinus Torvalds
16751da177e4SLinus Torvalds
16765dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
16775dffbe81SSegher Boessenkool
16785dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
16795dffbe81SSegher Boessenkool
1680fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
16815dffbe81SSegher Boessenkool
16825dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
16835dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
16845dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
16855dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
16865dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
16875dffbe81SSegher Boessenkool		echo '')
16885dffbe81SSegher Boessenkool
16895dffbe81SSegher Boessenkool
16901da177e4SLinus Torvalds# Documentation targets
16911da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1692e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1693e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
169422cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1695bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1696cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
16971da177e4SLinus Torvalds
169867274c08SMasahiro Yamada# Misc
169967274c08SMasahiro Yamada# ---------------------------------------------------------------------------
170067274c08SMasahiro Yamada
170167274c08SMasahiro YamadaPHONY += scripts_gdb
17027a739ce5SMasahiro Yamadascripts_gdb: prepare0
17031e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
17048d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
170567274c08SMasahiro Yamada
170667274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
170767274c08SMasahiro Yamadaall: scripts_gdb
170867274c08SMasahiro Yamadaendif
170967274c08SMasahiro Yamada
17101da177e4SLinus Torvaldselse # KBUILD_EXTMOD
17111da177e4SLinus Torvalds
17121da177e4SLinus Torvalds###
17131da177e4SLinus Torvalds# External module support.
17141da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
17151da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
17161da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
171711122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used.
17181da177e4SLinus Torvalds
17196212804fSMasahiro Yamada# We are always building only modules.
17206212804fSMasahiro YamadaKBUILD_BUILTIN :=
17211da177e4SLinus TorvaldsKBUILD_MODULES := 1
17221da177e4SLinus Torvalds
1723c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
17243d32285fSMasahiro Yamada$(MODORDER): descend
17253d32285fSMasahiro Yamada	@:
17263d32285fSMasahiro Yamada
17277f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json
17283d32285fSMasahiro YamadaPHONY += compile_commands.json
17293d32285fSMasahiro Yamada
173076cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
17313d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1732dc5723b0SSami Tolvanen	$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
17331da177e4SLinus Torvalds
1734fe69b420SMasahiro YamadaPHONY += help
17351da177e4SLinus Torvaldshelp:
17361da177e4SLinus Torvalds	@echo  '  Building external modules.'
17371da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
17381da177e4SLinus Torvalds	@echo  ''
17391da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
17401da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
17411da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
17421da177e4SLinus Torvalds	@echo  ''
174306300b21SSam Ravnborg
1744596b0474SMasahiro Yamada# no-op for external module builds
1745596b0474SMasahiro YamadaPHONY += prepare modules_prepare
1746596b0474SMasahiro Yamada
17471da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
17481da177e4SLinus Torvalds
17493e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
17503e3005dfSMasahiro Yamada# Modules
17513e3005dfSMasahiro Yamada
17523e3005dfSMasahiro YamadaPHONY += modules modules_install
17533e3005dfSMasahiro Yamada
17543e3005dfSMasahiro Yamadaifdef CONFIG_MODULES
17553e3005dfSMasahiro Yamada
17561a998be6SMasahiro Yamadamodules: modules_check
17573e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
17583e3005dfSMasahiro Yamada
17591a998be6SMasahiro YamadaPHONY += modules_check
17601a998be6SMasahiro Yamadamodules_check: $(MODORDER)
17611a998be6SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
17621a998be6SMasahiro Yamada
17633ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD  $(MODLIB)
17643e3005dfSMasahiro Yamada      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
17653e3005dfSMasahiro Yamada                   $(KERNELRELEASE)
17663e3005dfSMasahiro Yamada
17673e3005dfSMasahiro Yamadamodules_install:
17683e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
17693e3005dfSMasahiro Yamada	$(call cmd,depmod)
17703e3005dfSMasahiro Yamada
17713e3005dfSMasahiro Yamadaelse # CONFIG_MODULES
17723e3005dfSMasahiro Yamada
17733e3005dfSMasahiro Yamada# Modules not configured
17743e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
17753e3005dfSMasahiro Yamada
17763e3005dfSMasahiro Yamadamodules modules_install:
17773e3005dfSMasahiro Yamada	@echo >&2 '***'
17783e3005dfSMasahiro Yamada	@echo >&2 '*** The present kernel configuration has modules disabled.'
17793e3005dfSMasahiro Yamada	@echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
17803e3005dfSMasahiro Yamada	@echo >&2 '*** to enable CONFIG_MODULES.'
17813e3005dfSMasahiro Yamada	@echo >&2 '***'
17823e3005dfSMasahiro Yamada	@exit 1
17833e3005dfSMasahiro Yamada
17843e3005dfSMasahiro Yamadaendif # CONFIG_MODULES
17853e3005dfSMasahiro Yamada
1786b1fbfcb4SMasahiro Yamada# Single targets
1787b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1788b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1789b1fbfcb4SMasahiro Yamada#
1790b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1791b1fbfcb4SMasahiro Yamada#
1792b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1793b1fbfcb4SMasahiro Yamada#
1794b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1795b1fbfcb4SMasahiro Yamada#
1796b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1797b1fbfcb4SMasahiro Yamada
1798b1fbfcb4SMasahiro Yamadaifdef single-build
1799b1fbfcb4SMasahiro Yamada
1800b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1801b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1802b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1803b1fbfcb4SMasahiro Yamada
1804b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1805b1fbfcb4SMasahiro Yamada	@:
1806b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1807b1fbfcb4SMasahiro Yamada	@:
1808b1fbfcb4SMasahiro Yamada
1809b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1810b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1811b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1812b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1813b1fbfcb4SMasahiro Yamadaendif
1814b1fbfcb4SMasahiro Yamada
1815b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1816596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare
18177f69180bSMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
1818b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1819b1fbfcb4SMasahiro Yamada
1820b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1821b1fbfcb4SMasahiro Yamada
18227f69180bSMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
1823b1fbfcb4SMasahiro Yamada
1824b1fbfcb4SMasahiro Yamada# trim unrelated directories
1825b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1826b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1827b1fbfcb4SMasahiro Yamada
1828b1fbfcb4SMasahiro Yamadaendif
1829b1fbfcb4SMasahiro Yamada
1830b480fec9SMasahiro Yamadaifndef CONFIG_MODULES
1831b480fec9SMasahiro YamadaKBUILD_MODULES :=
1832b480fec9SMasahiro Yamadaendif
1833b480fec9SMasahiro Yamada
1834c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1835c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1836c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1837c99f3918SMasahiro Yamada# make menuconfig etc.
1838c99f3918SMasahiro Yamada# Error messages still appears in the original language
1839c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1840c99f3918SMasahiro Yamadadescend: $(build-dirs)
1841c99f3918SMasahiro Yamada$(build-dirs): prepare
1842b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
184320b1be59SMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
1844b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1845c99f3918SMasahiro Yamada
184676cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
184776cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
184876cd306dSMasahiro Yamada$(clean-dirs):
184976cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
185076cd306dSMasahiro Yamada
185188d7be03SMichal Marekclean: $(clean-dirs)
185288d7be03SMichal Marek	$(call cmd,rmfiles)
185343f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1854ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
18554f0e3a57SRob Herring		-o -name '*.ko.*' \
1856ce88c9c7SViresh Kumar		-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1857ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1858bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
185988d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
18609a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
18614fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
186288d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
18638b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
18646b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1865433db3e2SVinícius Tinti		-o -name '*.ll' \
186638e89184SSami Tolvanen		-o -name '*.gcno' \
186738e89184SSami Tolvanen		-o -name '*.*.symversions' \) -type f -print | xargs rm -f
186888d7be03SMichal Marek
18691da177e4SLinus Torvalds# Generate tags for editors
18701da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1871a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1872858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
18731da177e4SLinus Torvalds
1874f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
18751da177e4SLinus Torvalds	$(call cmd,tags)
18761da177e4SLinus Torvalds
1877eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1878eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1879eb8305aeSMatthias Maennich
1880eb8305aeSMatthias MaennichPHONY += nsdeps
1881bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1882eb8305aeSMatthias Maennichnsdeps: modules
1883bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1884eb8305aeSMatthias Maennich
18853d32285fSMasahiro Yamada# Clang Tooling
18863d32285fSMasahiro Yamada# ---------------------------------------------------------------------------
18873d32285fSMasahiro Yamada
18883d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN     $@
18893d32285fSMasahiro Yamada      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
18903d32285fSMasahiro Yamada
18917f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
18923d32285fSMasahiro Yamada	$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
18933d32285fSMasahiro Yamada	$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
18943d32285fSMasahiro Yamada	$(call if_changed,gen_compile_commands)
18953d32285fSMasahiro Yamada
18967f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json
18973d32285fSMasahiro Yamada
18986ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer
18996ad7cbc0SNathan Huckleberry
19006ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG
19016ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK   $<
19026ad7cbc0SNathan Huckleberry      cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
19036ad7cbc0SNathan Huckleberry
19047f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
19056ad7cbc0SNathan Huckleberry	$(call cmd,clang_tools)
19066ad7cbc0SNathan Huckleberryelse
19076ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer:
19086ad7cbc0SNathan Huckleberry	@echo "$@ requires CC=clang" >&2
19096ad7cbc0SNathan Huckleberry	@false
19106ad7cbc0SNathan Huckleberryendif
19116ad7cbc0SNathan Huckleberry
19121da177e4SLinus Torvalds# Scripts to check various things for consistency
19131da177e4SLinus Torvalds# ---------------------------------------------------------------------------
19141da177e4SLinus Torvalds
19157dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report
1916279f3dd3SPeter Foley
19171da177e4SLinus Torvaldsincludecheck:
1918436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19191da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
192080007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
19211da177e4SLinus Torvalds
19221da177e4SLinus Torvaldsversioncheck:
19232ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19241da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
192580007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
19261da177e4SLinus Torvalds
192774425eeeSNicolas Palixcoccicheck:
1928858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
192974425eeeSNicolas Palix
1930295ac051SAdrian Bunkexport_report:
1931295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1932295ac051SAdrian Bunk
1933c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1934e3ccf6e3SJeff Dike
1935011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1936011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1937011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1938011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1939011e3a9aSJeff Dikeifeq ($(ARCH), um)
1940011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1941011e3a9aSJeff Dikeelse
1942011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1943011e3a9aSJeff Dikeendif
19441da177e4SLinus Torvaldscheckstack:
19451da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
194675dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
19471da177e4SLinus Torvalds
19487b8ea53dSAmerigo Wangkernelrelease:
19497b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
195001ab1788SAmerigo Wang
1951cb58455cSSam Ravnborgkernelversion:
19522244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
19531da177e4SLinus Torvalds
1954c398ff00SMike Marciniszynimage_name:
1955c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1956c398ff00SMike Marciniszyn
19571da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
19580663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
19591da177e4SLinus Torvalds
1960392885eeSMasahiro Yamada# read saved command lines for existing targets
1961392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
19621da177e4SLinus Torvalds
1963b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
19641da177e4SLinus Torvalds
196546b7c492SSZ Lin (林上智)endif # config-build
19662042b548SMasahiro Yamadaendif # mixed-build
1967688931a5SMasahiro Yamadaendif # need-sub-make
19681da177e4SLinus Torvalds
19694f193362SPaul SmithPHONY += FORCE
19701da177e4SLinus TorvaldsFORCE:
19714f193362SPaul Smith
1972bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1973fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
19744f193362SPaul Smith.PHONY: $(PHONY)
1975