xref: /openbmc/linux/Makefile (revision 5e9e95cc9148b82074a5eae283e63bce3f1aacfe)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2568035b0SLinus TorvaldsVERSION = 6
3ac9a7868SLinus TorvaldsPATCHLEVEL = 4
455922c9dSLinus TorvaldsSUBLEVEL = 0
5f1fcbaa1SLinus TorvaldsEXTRAVERSION = -rc2
6568035b0SLinus TorvaldsNAME = Hurr durr I'ma ninja sloth
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
1487d599fcSMasahiro Yamadaifeq ($(filter undefine,$(.FEATURES)),)
1587d599fcSMasahiro Yamada$(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION))
1687d599fcSMasahiro Yamadaendif
1787d599fcSMasahiro Yamada
18121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \
19121c2a13SMasahiro Yamada	$(error targets prefixed with '__' are only for internal use))
20121c2a13SMasahiro Yamada
21ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
22121c2a13SMasahiro YamadaPHONY := __all
23121c2a13SMasahiro Yamada__all:
24ba634eceSMasahiro Yamada
251da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
261da177e4SLinus Torvalds# to get the ordering right.
271da177e4SLinus Torvalds#
281da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
291da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
301da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
31f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
321da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
331da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
341da177e4SLinus Torvalds# is now up to date.
351da177e4SLinus Torvalds#
361da177e4SLinus Torvalds# The only cases where we need to modify files which have global
371da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
381da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
391da177e4SLinus Torvalds# prepare rule.
401da177e4SLinus Torvalds
41221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
423812b8c5SMasahiro Yamada
433812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
443812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
453812b8c5SMasahiro YamadaMAKEFLAGS += -rR
463812b8c5SMasahiro Yamada
473812b8c5SMasahiro Yamada# Avoid funny character set dependencies
483812b8c5SMasahiro Yamadaunexport LC_ALL
493812b8c5SMasahiro YamadaLC_COLLATE=C
503812b8c5SMasahiro YamadaLC_NUMERIC=C
513812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
523812b8c5SMasahiro Yamada
533812b8c5SMasahiro Yamada# Avoid interference with shell env settings
543812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
553812b8c5SMasahiro Yamada
56066b7ed9SMichal Marek# Beautify output
57066b7ed9SMichal Marek# ---------------------------------------------------------------------------
58066b7ed9SMichal Marek#
598962b6b4SMasahiro Yamada# Most of build commands in Kbuild start with "cmd_". You can optionally define
608962b6b4SMasahiro Yamada# "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from
618962b6b4SMasahiro Yamada# that command is printed by default.
62066b7ed9SMichal Marek#
638962b6b4SMasahiro Yamada# e.g.)
648962b6b4SMasahiro Yamada#    quiet_cmd_depmod = DEPMOD  $(MODLIB)
658962b6b4SMasahiro Yamada#          cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE)
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#
708962b6b4SMasahiro Yamada#    $(Q)$(MAKE) $(build)=scripts/basic
71066b7ed9SMichal Marek#
726ae4b986SMasahiro Yamada# If KBUILD_VERBOSE contains 1, the whole command is echoed.
736ae4b986SMasahiro Yamada# If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed.
74066b7ed9SMichal Marek#
751da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
761da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
771da177e4SLinus Torvalds
781da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
791da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
801da177e4SLinus Torvaldsendif
811da177e4SLinus Torvalds
82066b7ed9SMichal Marekquiet = quiet_
83066b7ed9SMichal MarekQ = @
846ae4b986SMasahiro Yamada
856ae4b986SMasahiro Yamadaifneq ($(findstring 1, $(KBUILD_VERBOSE)),)
866ae4b986SMasahiro Yamada  quiet =
876ae4b986SMasahiro Yamada  Q =
88066b7ed9SMichal Marekendif
89066b7ed9SMichal Marek
90066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
91066b7ed9SMichal Marek# commands
924bf73588SDmitry Goncharov# make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
93066b7ed9SMichal Marek
944bf73588SDmitry Goncharovifeq ($(filter 3.%,$(MAKE_VERSION)),)
95fc5d57a9SMasahiro Yamadashort-opts := $(firstword -$(MAKEFLAGS))
964bf73588SDmitry Goncharovelse
97fc5d57a9SMasahiro Yamadashort-opts := $(filter-out --%,$(MAKEFLAGS))
984bf73588SDmitry Goncharovendif
994bf73588SDmitry Goncharov
100fc5d57a9SMasahiro Yamadaifneq ($(findstring s,$(short-opts)),)
101066b7ed9SMichal Marekquiet=silent_
10283d98d73SMasahiro Yamadaoverride KBUILD_VERBOSE :=
103066b7ed9SMichal Marekendif
104066b7ed9SMichal Marek
105066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
106066b7ed9SMichal Marek
107bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
108bcf637f5SMasahiro Yamada# C compilation.
109bcf637f5SMasahiro Yamada#
110bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
111bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
112bcf637f5SMasahiro Yamada# of whether they are re-compiled or not.
113bcf637f5SMasahiro Yamada#
114bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details,
115bcf637f5SMasahiro Yamada# including where to get the "sparse" utility.
116bcf637f5SMasahiro Yamada
117bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line")
118bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
119bcf637f5SMasahiro Yamadaendif
120bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC
121bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = 0
122bcf637f5SMasahiro Yamadaendif
123bcf637f5SMasahiro Yamada
124bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC
125bcf637f5SMasahiro Yamada
1262f7ab126SMiguel Ojeda# Enable "clippy" (a linter) as part of the Rust compilation.
1272f7ab126SMiguel Ojeda#
1282f7ab126SMiguel Ojeda# Use 'make CLIPPY=1' to enable it.
1292f7ab126SMiguel Ojedaifeq ("$(origin CLIPPY)", "command line")
1302f7ab126SMiguel Ojeda  KBUILD_CLIPPY := $(CLIPPY)
1312f7ab126SMiguel Ojedaendif
1322f7ab126SMiguel Ojeda
1332f7ab126SMiguel Ojedaexport KBUILD_CLIPPY
1342f7ab126SMiguel Ojeda
135bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
136bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
137bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line")
138bcf637f5SMasahiro Yamada  KBUILD_EXTMOD := $(M)
139bcf637f5SMasahiro Yamadaendif
140bcf637f5SMasahiro Yamada
141bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \
142bcf637f5SMasahiro Yamada	$(error building multiple external modules is not supported))
143bcf637f5SMasahiro Yamada
1449a68fd7fSMasahiro Yamada$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \
1459a68fd7fSMasahiro Yamada	$(error module directory path cannot contain '$x')))
1469a68fd7fSMasahiro Yamada
14774ee585bSMasahiro Yamada# Remove trailing slashes
14874ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),)
14974ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
15074ee585bSMasahiro Yamadaendif
15174ee585bSMasahiro Yamada
152bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD
153bcf637f5SMasahiro Yamada
15425b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
15525b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
15625b146c5SMasahiro Yamada#
15725b146c5SMasahiro Yamada# For example, you can do this:
15825b146c5SMasahiro Yamada#
15925b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
16025b146c5SMasahiro Yamada#
16125b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
16225b146c5SMasahiro Yamada# two syntaxes to specify it.
16325b146c5SMasahiro Yamada#
1641da177e4SLinus Torvalds# 1) O=
1651da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1661da177e4SLinus Torvalds#
1671da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
16825b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
16925b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1701da177e4SLinus Torvalds#
1711da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1721da177e4SLinus Torvalds# variable.
1731da177e4SLinus Torvalds
17425b146c5SMasahiro Yamada# Do we want to change the working directory?
1751da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1761da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1771da177e4SLinus Torvaldsendif
1781da177e4SLinus Torvalds
17925b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
18025b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
18125b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
18225b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
18325b146c5SMasahiro Yamada$(if $(abs_objtree),, \
18425b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
18525b146c5SMasahiro Yamada
18625b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
18725b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
18825b146c5SMasahiro Yamadaelse
18925b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
19025b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
19125b146c5SMasahiro Yamada
19225b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
19325b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
19425b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
19525b146c5SMasahiro Yamadaelse
19625b146c5SMasahiro Yamadaneed-sub-make := 1
19751193b76SRobert Jarzmikendif
19851193b76SRobert Jarzmik
19930cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST))
20030cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile)))
2011da177e4SLinus Torvalds
20225b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
20325b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
20425b146c5SMasahiro Yamadaendif
20525b146c5SMasahiro Yamada
206688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
207688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
208688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
209688931a5SMasahiro Yamadaneed-sub-make := 1
210688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
21193fdddfeSMasahiro Yamada$(this-makefile): ;
212688931a5SMasahiro Yamadaendif
213688931a5SMasahiro Yamada
21425b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
215221cc2d2SMasahiro Yamadaexport sub_make_done := 1
216221cc2d2SMasahiro Yamada
217688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
218688931a5SMasahiro Yamada
219121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make
2200b35786dSMilton Miller
221121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
22216f89098SCharles Keepax	@:
2230b35786dSMilton Miller
224c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
225121c2a13SMasahiro Yamada__sub-make:
22625b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
2271da177e4SLinus Torvalds
228688931a5SMasahiro Yamadaendif # need-sub-make
229221cc2d2SMasahiro Yamadaendif # sub_make_done
230688931a5SMasahiro Yamada
2311da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
232688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
2331da177e4SLinus Torvalds
2347ff52571SMasahiro Yamada# Do not print "Entering directory ...",
2357ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
2367ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
2377ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
2387ff52571SMasahiro Yamada
23925b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
2409da0763bSMichal Marek        # building in the source tree
2419da0763bSMichal Marek        srctree := .
242051f278eSMasahiro Yamada	building_out_of_srctree :=
2439da0763bSMichal Marekelse
24425b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
2459da0763bSMichal Marek                # building in a subdirectory of the source tree
2469da0763bSMichal Marek                srctree := ..
2479da0763bSMichal Marek        else
24825b146c5SMasahiro Yamada                srctree := $(abs_srctree)
2499da0763bSMichal Marek        endif
250051f278eSMasahiro Yamada	building_out_of_srctree := 1
2519da0763bSMichal Marekendif
2522c1f4f12SMasahiro Yamada
25395fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
25495fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
25595fd3f87SMasahiro Yamadaendif
2562c1f4f12SMasahiro Yamada
2577e1c0477SMichal Marekobjtree		:= .
2586b12de69SMasahiro YamadaVPATH		:= $(srctree)
2591da177e4SLinus Torvalds
260051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
2611da177e4SLinus Torvalds
2622c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2632c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2642c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2652c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2662c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2672c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2682c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2692c1f4f12SMasahiro Yamada
2702c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2712c1f4f12SMasahiro Yamada
27222340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
27322340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2742c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
27559b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
2764623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
27705e96e96SMasahiro Yamada			 outputmakefile rustavailable rustfmt rustfmtcheck
278805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install
279805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed.
280805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \
281805b2e1dSMasahiro Yamada			headers_install modules_install kernelrelease image_name
282993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
283993bdde9SMasahiro Yamada			  image_name
284aa4847dbSMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/
2852c1f4f12SMasahiro Yamada
2862042b548SMasahiro Yamadaconfig-build	:=
2872042b548SMasahiro Yamadamixed-build	:=
2882042b548SMasahiro Yamadaneed-config	:= 1
289805b2e1dSMasahiro Yamadaneed-compiler	:= 1
290d7942413SMasahiro Yamadamay-sync-config	:= 1
291394053f4SMasahiro Yamadasingle-build	:=
2922c1f4f12SMasahiro Yamada
2932c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2942c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2952042b548SMasahiro Yamada		need-config :=
2962c1f4f12SMasahiro Yamada	endif
2972c1f4f12SMasahiro Yamadaendif
2982c1f4f12SMasahiro Yamada
299805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
300805b2e1dSMasahiro Yamada	ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
301805b2e1dSMasahiro Yamada		need-compiler :=
302805b2e1dSMasahiro Yamada	endif
303805b2e1dSMasahiro Yamadaendif
304805b2e1dSMasahiro Yamada
305d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
306d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
3072042b548SMasahiro Yamada		may-sync-config :=
308d7942413SMasahiro Yamada	endif
309d7942413SMasahiro Yamadaendif
310d7942413SMasahiro Yamada
311d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
3122042b548SMasahiro Yamada	may-sync-config :=
313d7942413SMasahiro Yamadaendif
314d7942413SMasahiro Yamada
3152c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
316efbf9726SMasahiro Yamada        ifneq ($(filter %config,$(MAKECMDGOALS)),)
3172042b548SMasahiro Yamada		config-build := 1
3182c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
3192042b548SMasahiro Yamada			mixed-build := 1
3202c1f4f12SMasahiro Yamada                endif
3212c1f4f12SMasahiro Yamada        endif
3222c1f4f12SMasahiro Yamadaendif
32322340a06SMasahiro Yamada
324394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
325394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
326394053f4SMasahiro Yamada	single-build := 1
327394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
328394053f4SMasahiro Yamada		mixed-build := 1
329394053f4SMasahiro Yamada	endif
330394053f4SMasahiro Yamadaendif
331394053f4SMasahiro Yamada
33222340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
33322340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
33422340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3352042b548SMasahiro Yamada		mixed-build := 1
33622340a06SMasahiro Yamada        endif
33722340a06SMasahiro Yamadaendif
33822340a06SMasahiro Yamada
3392c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3402c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3412c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3422042b548SMasahiro Yamada		mixed-build := 1
3432c1f4f12SMasahiro Yamada        endif
3442c1f4f12SMasahiro Yamadaendif
3452c1f4f12SMasahiro Yamada
3462042b548SMasahiro Yamadaifdef mixed-build
3472c1f4f12SMasahiro Yamada# ===========================================================================
3482c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3492c1f4f12SMasahiro Yamada# Handle them one by one.
3502c1f4f12SMasahiro Yamada
3512c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3522c1f4f12SMasahiro Yamada
353121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one
3542c1f4f12SMasahiro Yamada	@:
3552c1f4f12SMasahiro Yamada
3562c1f4f12SMasahiro Yamada__build_one_by_one:
3572c1f4f12SMasahiro Yamada	$(Q)set -e; \
3582c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3592c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3602c1f4f12SMasahiro Yamada	done
3612c1f4f12SMasahiro Yamada
3622042b548SMasahiro Yamadaelse # !mixed-build
3632c1f4f12SMasahiro Yamada
3643204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include
3652c1f4f12SMasahiro Yamada
3662c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3676768fa4bSMasahiro YamadaKERNELRELEASE = $(call read-file, include/config/kernel.release)
3682c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3692c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3702c1f4f12SMasahiro Yamada
3713204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include
3721da177e4SLinus Torvalds
3731da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3741da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3751da177e4SLinus Torvalds#
3761da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3771da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3781da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3791da177e4SLinus Torvalds# make ARCH=ia64
3801da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3811da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3821da177e4SLinus Torvalds
3831da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3841da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3851da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3861da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3871da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3881da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3891da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3901da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3912331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3921da177e4SLinus Torvalds
3931da177e4SLinus Torvalds# Architecture as present in compile.h
3941da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3956752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3961da177e4SLinus Torvalds
397d746d647SSam Ravnborg# Additional ARCH settings for x86
398d746d647SSam Ravnborgifeq ($(ARCH),i386)
399d746d647SSam Ravnborg        SRCARCH := x86
400d746d647SSam Ravnborgendif
401d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
402d746d647SSam Ravnborg        SRCARCH := x86
403d746d647SSam Ravnborgendif
40474b469f2SSam Ravnborg
4055e538790SSam Ravnborg# Additional ARCH settings for sparc
406e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
407e69f58c0SNamhyung Kim       SRCARCH := sparc
408e69f58c0SNamhyung Kimendif
409a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
4105e538790SSam Ravnborg       SRCARCH := sparc
411a439fe51SSam Ravnborgendif
4122fb9b1bdSSam Ravnborg
4135f6e0fe0SMasahiro Yamada# Additional ARCH settings for parisc
4145f6e0fe0SMasahiro Yamadaifeq ($(ARCH),parisc64)
4155f6e0fe0SMasahiro Yamada       SRCARCH := parisc
4165f6e0fe0SMasahiro Yamadaendif
4175f6e0fe0SMasahiro Yamada
418f02aa48dSMasahiro Yamadaexport cross_compiling :=
419f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH))
420f02aa48dSMasahiro Yamadacross_compiling := 1
421f02aa48dSMasahiro Yamadaendif
422f02aa48dSMasahiro Yamada
42314cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
42441263fc6SBen Gardinerexport KCONFIG_CONFIG
42514cdd3c4SRoman Zippel
4261da177e4SLinus Torvalds# SHELL used by kbuild
427858805b3SMasahiro YamadaCONFIG_SHELL := sh
4281da177e4SLinus Torvalds
4296d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
4306d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4316d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
432d7f14c66SUwe Kleine-König
433a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
434e9c28192SNathan Chancellorifneq ($(filter %/,$(LLVM)),)
435e9c28192SNathan ChancellorLLVM_PREFIX := $(LLVM)
436e9c28192SNathan Chancellorelse ifneq ($(filter -%,$(LLVM)),)
437e9c28192SNathan ChancellorLLVM_SUFFIX := $(LLVM)
438e9c28192SNathan Chancellorendif
439e9c28192SNathan Chancellor
440e9c28192SNathan ChancellorHOSTCC	= $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
441e9c28192SNathan ChancellorHOSTCXX	= $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)
442a0d1c951SMasahiro Yamadaelse
4431da177e4SLinus TorvaldsHOSTCC	= gcc
4441da177e4SLinus TorvaldsHOSTCXX	= g++
445a0d1c951SMasahiro Yamadaendif
4462f7ab126SMiguel OjedaHOSTRUSTC = rustc
447d5ea4fecSChun-Tse ShaoHOSTPKG_CONFIG	= pkg-config
4487f3a59dbSMasahiro Yamada
449f67695c9SElliot BermanKBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
4501e240781SArnd Bergmann			 -O2 -fomit-frame-pointer -std=gnu11 \
4514d94f910SMark Rutland			 -Wdeclaration-after-statement
452f67695c9SElliot BermanKBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
453f67695c9SElliot BermanKBUILD_USERLDFLAGS := $(USERLDFLAGS)
4547f3a59dbSMasahiro Yamada
4552f7ab126SMiguel Ojeda# These flags apply to all Rust code in the tree, including the kernel and
4562f7ab126SMiguel Ojeda# host programs.
4572f7ab126SMiguel Ojedaexport rust_common_flags := --edition=2021 \
4582f7ab126SMiguel Ojeda			    -Zbinary_dep_depinfo=y \
4592f7ab126SMiguel Ojeda			    -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \
4602f7ab126SMiguel Ojeda			    -Dunreachable_pub -Dnon_ascii_idents \
4612f7ab126SMiguel Ojeda			    -Wmissing_docs \
4622f7ab126SMiguel Ojeda			    -Drustdoc::missing_crate_level_docs \
4632f7ab126SMiguel Ojeda			    -Dclippy::correctness -Dclippy::style \
4642f7ab126SMiguel Ojeda			    -Dclippy::suspicious -Dclippy::complexity \
4652f7ab126SMiguel Ojeda			    -Dclippy::perf \
4662f7ab126SMiguel Ojeda			    -Dclippy::let_unit_value -Dclippy::mut_mut \
4672f7ab126SMiguel Ojeda			    -Dclippy::needless_bitwise_bool \
4682f7ab126SMiguel Ojeda			    -Dclippy::needless_continue \
4692f7ab126SMiguel Ojeda			    -Wclippy::dbg_macro
4702f7ab126SMiguel Ojeda
471f67695c9SElliot BermanKBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
472735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
4732f7ab126SMiguel OjedaKBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \
4742f7ab126SMiguel Ojeda			-Zallow-features= $(HOSTRUSTFLAGS)
475f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
476f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4771da177e4SLinus Torvalds
4781da177e4SLinus Torvalds# Make variables (CC, etc...)
4791da177e4SLinus TorvaldsCPP		= $(CC) -E
480a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
481e9c28192SNathan ChancellorCC		= $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
482e9c28192SNathan ChancellorLD		= $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
483e9c28192SNathan ChancellorAR		= $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
484e9c28192SNathan ChancellorNM		= $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX)
485e9c28192SNathan ChancellorOBJCOPY		= $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX)
486e9c28192SNathan ChancellorOBJDUMP		= $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX)
487e9c28192SNathan ChancellorREADELF		= $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX)
488e9c28192SNathan ChancellorSTRIP		= $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
489a0d1c951SMasahiro Yamadaelse
490a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
491a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
4921da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4931da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4941da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4951da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
496eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
497a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
498a0d1c951SMasahiro Yamadaendif
4992f7ab126SMiguel OjedaRUSTC		= rustc
5002f7ab126SMiguel OjedaRUSTDOC		= rustdoc
5012f7ab126SMiguel OjedaRUSTFMT		= rustfmt
5022f7ab126SMiguel OjedaCLIPPY_DRIVER	= clippy-driver
5032f7ab126SMiguel OjedaBINDGEN		= bindgen
5042f7ab126SMiguel OjedaCARGO		= cargo
505e83b9f55SAndrii NakryikoPAHOLE		= pahole
506c9a0f3b8SJiri OlsaRESOLVE_BTFIDS	= $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
50773a4f6dbSMasahiro YamadaLEX		= flex
50873a4f6dbSMasahiro YamadaYACC		= bison
5091da177e4SLinus TorvaldsAWK		= awk
510caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
511436e980eSDominique MartinetDEPMOD		= depmod
5121da177e4SLinus TorvaldsPERL		= perl
513e9781b52SMasahiro YamadaPYTHON3		= python3
5141da177e4SLinus TorvaldsCHECK		= sparse
515858805b3SMasahiro YamadaBASH		= bash
516e4a42c82SDenis EfremovKGZIP		= gzip
517e4a42c82SDenis EfremovKBZIP2		= bzip2
518e4a42c82SDenis EfremovKLZOP		= lzop
5198dfb61dcSDenis EfremovLZMA		= lzma
5208dfb61dcSDenis EfremovLZ4		= lz4c
5218dfb61dcSDenis EfremovXZ		= xz
52248f7ddf7SNick TerrellZSTD		= zstd
5238dfb61dcSDenis Efremov
5249741e07eSJiri OlsaPAHOLE_FLAGS	= $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
5259741e07eSJiri Olsa
52680a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
5276c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
5280c22be07SDouglas AndersonNOSTDINC_FLAGS :=
5296588169dSSam RavnborgCFLAGS_MODULE   =
5302f7ab126SMiguel OjedaRUSTFLAGS_MODULE =
5316588169dSSam RavnborgAFLAGS_MODULE   =
5326588169dSSam RavnborgLDFLAGS_MODULE  =
5331da177e4SLinus TorvaldsCFLAGS_KERNEL	=
5342f7ab126SMiguel OjedaRUSTFLAGS_KERNEL =
5351da177e4SLinus TorvaldsAFLAGS_KERNEL	=
5368debed3eSMasahiro YamadaLDFLAGS_vmlinux =
5371da177e4SLinus Torvalds
538abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
539abbf1590SDavid HowellsUSERINCLUDE    := \
5409d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
5419d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
542abbf1590SDavid Howells		-I$(srctree)/include/uapi \
5433308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
544ce6ed1c4SMasahiro Yamada                -include $(srctree)/include/linux/compiler-version.h \
545abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
546abbf1590SDavid Howells
5471da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
5481da177e4SLinus Torvalds# Needed to be compatible with the O= option
549abbf1590SDavid HowellsLINUXINCLUDE    := \
5509d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
5519d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
552051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
553f8224f7fSMasahiro Yamada		-I$(objtree)/include \
554f8224f7fSMasahiro Yamada		$(USERINCLUDE)
5551da177e4SLinus Torvalds
55642a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
557eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
55842a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
559b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
5603bc753c0SJason A. Donenfeld		   -Werror=return-type -Wno-format-security -funsigned-char \
561e8c07082SArnd Bergmann		   -std=gnu11
562433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
5632f7ab126SMiguel OjedaKBUILD_RUSTFLAGS := $(rust_common_flags) \
564c83b16ceSMasahiro Yamada		    --target=$(objtree)/scripts/target.json \
5652f7ab126SMiguel Ojeda		    -Cpanic=abort -Cembed-bitcode=n -Clto=n \
5662f7ab126SMiguel Ojeda		    -Cforce-unwind-tables=n -Ccodegen-units=1 \
5672f7ab126SMiguel Ojeda		    -Csymbol-mangling-version=v0 \
5682f7ab126SMiguel Ojeda		    -Crelocation-model=static \
5692f7ab126SMiguel Ojeda		    -Zfunction-sections=n \
5702f7ab126SMiguel Ojeda		    -Dclippy::float_arithmetic
5712f7ab126SMiguel Ojeda
57280c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
57380c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
5742f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL :=
5756588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
5766588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
5772f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_MODULE := --cfg MODULE
57810df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
579d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
5805241ab4cSMasahiro YamadaCLANG_FLAGS :=
5811da177e4SLinus Torvalds
5822f7ab126SMiguel Ojedaifeq ($(KBUILD_CLIPPY),1)
5832f7ab126SMiguel Ojeda	RUSTC_OR_CLIPPY_QUIET := CLIPPY
5842f7ab126SMiguel Ojeda	RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)
5852f7ab126SMiguel Ojedaelse
5862f7ab126SMiguel Ojeda	RUSTC_OR_CLIPPY_QUIET := RUSTC
5872f7ab126SMiguel Ojeda	RUSTC_OR_CLIPPY = $(RUSTC)
5882f7ab126SMiguel Ojedaendif
5892f7ab126SMiguel Ojeda
5902f7ab126SMiguel Ojedaifdef RUST_LIB_SRC
5912f7ab126SMiguel Ojeda	export RUST_LIB_SRC
5922f7ab126SMiguel Ojedaendif
5932f7ab126SMiguel Ojeda
5942f7ab126SMiguel Ojeda# Allows the usage of unstable features in stable compilers.
5952f7ab126SMiguel Ojedaexport RUSTC_BOOTSTRAP := 1
5962f7ab126SMiguel Ojeda
597d5ea4fecSChun-Tse Shaoexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
5982f7ab126SMiguel Ojedaexport RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO
5992f7ab126SMiguel Ojedaexport HOSTRUSTC KBUILD_HOSTRUSTFLAGS
600d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
601d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
60248f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
6037bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
604f67695c9SElliot Bermanexport KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
6051da177e4SLinus Torvalds
606d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
6070e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
6082f7ab126SMiguel Ojedaexport KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE
609222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
6102f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE
6112f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
6129741e07eSJiri Olsaexport PAHOLE_FLAGS
6131da177e4SLinus Torvalds
6141da177e4SLinus Torvalds# Files to ignore in find ... statements
6151da177e4SLinus Torvalds
616ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
617ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
618ae63b2d7SPrarit Bhargava			  -prune -o
619450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
620450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
6211da177e4SLinus Torvalds
6221da177e4SLinus Torvalds# ===========================================================================
6231da177e4SLinus Torvalds# Rules shared between *config targets and build targets
6241da177e4SLinus Torvalds
625312a3d09SCao jin# Basic helpers built in scripts/basic/
6264f193362SPaul SmithPHONY += scripts_basic
6271da177e4SLinus Torvaldsscripts_basic:
6281da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
6291da177e4SLinus Torvalds
6304f193362SPaul SmithPHONY += outputmakefile
6312728fcfaSMasahiro Yamadaifdef building_out_of_srctree
632e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
633fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
634fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
635fd5f0cd6SJan Beulich# output directory.
6363a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
6373a51ff34SVladimir Kondratiev# ignore whole output directory
6382728fcfaSMasahiro Yamada
6392728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN     Makefile
6402728fcfaSMasahiro Yamada      cmd_makefile = { \
6412728fcfaSMasahiro Yamada	echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
6422728fcfaSMasahiro Yamada	echo "include $(srctree)/Makefile"; \
6432728fcfaSMasahiro Yamada	} > Makefile
6442728fcfaSMasahiro Yamada
6451da177e4SLinus Torvaldsoutputmakefile:
6464b098659SMasahiro Yamada	@if [ -f $(srctree)/.config -o \
647e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
648e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
649e8e83a23SMasahiro Yamada		echo >&2 "***"; \
650e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
651e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
652e8e83a23SMasahiro Yamada		echo >&2 "***"; \
653e8e83a23SMasahiro Yamada		false; \
654e8e83a23SMasahiro Yamada	fi
65592979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
6562728fcfaSMasahiro Yamada	$(call cmd,makefile)
657156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
658156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
659fd5f0cd6SJan Beulichendif
6601da177e4SLinus Torvalds
661db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
662db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
663db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
664db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade.
6656072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
666db07562aSNick Desaulniers
667db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
6686f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang
669ae6b289aSChris Friesendif
670ae6b289aSChris Fries
67157fd251cSMasahiro Yamada# Include this also for config targets because some architectures need
67257fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE.
673805b2e1dSMasahiro Yamadaifdef need-compiler
67457fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler
675805b2e1dSMasahiro Yamadaendif
67657fd251cSMasahiro Yamada
6772042b548SMasahiro Yamadaifdef config-build
6781da177e4SLinus Torvalds# ===========================================================================
6791da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
6801da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
6811da177e4SLinus Torvalds
6821da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
6831da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
6841da177e4SLinus Torvalds# used for 'make defconfig'
6853204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
686315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
6871da177e4SLinus Torvalds
68836de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
68931110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
69031110ebbSSam Ravnborg
69136de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
6921da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
6931da177e4SLinus Torvalds
6942042b548SMasahiro Yamadaelse #!config-build
6951da177e4SLinus Torvalds# ===========================================================================
6961da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
6971da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
6981da177e4SLinus Torvalds
6992c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
700121c2a13SMasahiro Yamada# but instead __all depend on modules
7012c1f4f12SMasahiro YamadaPHONY += all
7022c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
703121c2a13SMasahiro Yamada__all: all
7042c1f4f12SMasahiro Yamadaelse
705121c2a13SMasahiro Yamada__all: modules
7062c1f4f12SMasahiro Yamadaendif
7072c1f4f12SMasahiro Yamada
70832164845SMasahiro Yamadatargets :=
70932164845SMasahiro Yamada
7102c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
7112c1f4f12SMasahiro Yamada# Normally, just do built-in.
7122c1f4f12SMasahiro Yamada
7132c1f4f12SMasahiro YamadaKBUILD_MODULES :=
7142c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
7152c1f4f12SMasahiro Yamada
7162c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
7172c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
7184b50c8c4SMasahiro Yamada  KBUILD_BUILTIN :=
7192c1f4f12SMasahiro Yamadaendif
7202c1f4f12SMasahiro Yamada
7212c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
7222c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
7232c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
7242c1f4f12SMasahiro Yamada
7256ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
7262c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
7272c1f4f12SMasahiro Yamadaendif
7282c1f4f12SMasahiro Yamada
7292c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
7302c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
7312c1f4f12SMasahiro Yamadaendif
7322c1f4f12SMasahiro Yamada
7332c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
7342c1f4f12SMasahiro Yamada
7352042b548SMasahiro Yamadaifdef need-config
736d93a18f2SMasahiro Yamadainclude include/config/auto.conf
737d93a18f2SMasahiro Yamadaendif
738d93a18f2SMasahiro Yamada
7391da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
7401da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
7415750121aSMasahiro Yamadacore-y		:=
7425750121aSMasahiro Yamadadrivers-y	:=
7431da177e4SLinus Torvaldslibs-y		:= lib/
7441da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
7451da177e4SLinus Torvalds
746315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
747315bab4eSMasahiro Yamada# command line.
748315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
749315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
750315bab4eSMasahiro Yamadaall: vmlinux
751315bab4eSMasahiro Yamada
7527d73c3e9SNick DesaulniersCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage
7537d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
7547d73c3e9SNick DesaulniersCFLAGS_GCOV	+= -fno-tree-loop-im
7557d73c3e9SNick Desaulniersendif
7565aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
757315bab4eSMasahiro Yamada
758b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
759b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
760b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
761b1f4ff74SPaulo Zanoniendif
762b1f4ff74SPaulo Zanoni
7633204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
764315bab4eSMasahiro Yamada
7652042b548SMasahiro Yamadaifdef need-config
7662042b548SMasahiro Yamadaifdef may-sync-config
767315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
768315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
769315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
770d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
7711da177e4SLinus Torvalds
77205850719SMasahiro Yamada$(KCONFIG_CONFIG):
77305850719SMasahiro Yamada	@echo >&2 '***'
77405850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
77505850719SMasahiro Yamada	@echo >&2 '***'
77605850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
77705850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
77805850719SMasahiro Yamada	@echo >&2 '***'
77905850719SMasahiro Yamada	@/bin/false
7801da177e4SLinus Torvalds
78161277981SUlf Magnusson# The actual configuration files used during the build are stored in
78261277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
78361277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
7849390dff6SMasahiro Yamada#
7859390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
7869390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
787f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
788d952cfafSMasahiro Yamada#
789d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
790d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input.
7912f7ab126SMiguel Ojeda%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG)
792d952cfafSMasahiro Yamada	$(Q)$(kecho) "  SYNC    $@"
793d952cfafSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
7942042b548SMasahiro Yamadaelse # !may-sync-config
795d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
796d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
797d7942413SMasahiro Yamada# Use auto.conf to trigger the test
7989ee4e336SSam RavnborgPHONY += include/config/auto.conf
7999ee4e336SSam Ravnborg
8009ee4e336SSam Ravnborginclude/config/auto.conf:
8014b098659SMasahiro Yamada	@test -e include/generated/autoconf.h -a -e $@ || (		\
8025369f550SMichal Marek	echo >&2;							\
8035369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
8045369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
8055369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
8065369f550SMichal Marek	echo >&2 ;							\
8079ee4e336SSam Ravnborg	/bin/false)
8089ee4e336SSam Ravnborg
809d7942413SMasahiro Yamadaendif # may-sync-config
8102042b548SMasahiro Yamadaendif # need-config
8111da177e4SLinus Torvalds
8127d73c3e9SNick DesaulniersKBUILD_CFLAGS	+= -fno-delete-null-pointer-checks
813ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
814bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
815bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
8166f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
817a1c48bb1SGeert Uytterhoeven
81815f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
819a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
8202f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=2
82115f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
82215f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
8232f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=s
8241da177e4SLinus Torvaldsendif
8251da177e4SLinus Torvalds
8262f7ab126SMiguel Ojeda# Always set `debug-assertions` and `overflow-checks` because their default
8272f7ab126SMiguel Ojeda# depends on `opt-level` and `debug-assertions`, respectively.
8282f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
8292f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n)
8302f7ab126SMiguel Ojeda
83169102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
8327d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
8337d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to
8347d73c3e9SNick Desaulniers# -fno-allow-store-data-races.
83569102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
836b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
8377d73c3e9SNick Desaulniersendif
83869102311SJiri Kosina
8391873e870SAndi Kleenifdef CONFIG_READABLE_ASM
8401873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
8411873e870SAndi Kleen# reorder blocks reorders the control in the function
8421873e870SAndi Kleen# ipa clone creates specialized cloned functions
8431873e870SAndi Kleen# partial inlining inlines only parts of functions
8447d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
8451873e870SAndi Kleenendif
8461873e870SAndi Kleen
84708f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
848a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
84935bb5b1eSAndi Kleenendif
85035bb5b1eSAndi Kleen
851893ab004SMasahiro Yamadastackp-flags-y                                    := -fno-stack-protector
852050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
853050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
8542a61f474SMasahiro Yamada
8552a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
856e06b8b98SSam Ravnborg
857efa80b02SMasahiro YamadaKBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror
858efa80b02SMasahiro YamadaKBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y)
859f0be87c4SLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
8603fe617ccSLinus Torvalds
8612f7ab126SMiguel OjedaKBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
8622f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
8632f7ab126SMiguel Ojeda
864076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
865e8c07082SArnd Bergmann# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable.
866a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
867d936eb23SLinus Torvaldselse
868d936eb23SLinus Torvalds
86949832c81SRandy Dunlap# gcc inanely warns about local variables called 'main'
87049832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main
871cfe17c9bSMasahiro Yamadaendif
872cfe17c9bSMasahiro Yamada
873885480b0SNathan Chancellor# These warnings generated too much noise in a regular build.
874885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
875885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
8760a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
8776272cc38SNathan Chancellor
87849beadbdSLinus Torvalds# These result in bogus false positives
87949beadbdSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
88049beadbdSLinus Torvalds
8811da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
882a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
8832f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cforce-frame-pointers=y
8841da177e4SLinus Torvaldselse
8857e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
8867e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
8877e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
8887e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
8897e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
8902f7ab126SMiguel Ojeda# In the Rust target specification, "frame-pointer" is set explicitly
8912f7ab126SMiguel Ojeda# to "may-omit".
8927e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
893a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
8941da177e4SLinus Torvaldsendif
8957e9501fdSRabin Vincentendif
8961da177e4SLinus Torvalds
897f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern.
898f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN
899709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
900709a972eSKees Cookendif
901709a972eSKees Cook
902f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value.
903f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO
904f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
905607e57c6SKees Cookifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
906607e57c6SKees Cook# https://github.com/llvm/llvm-project/issues/44842
9074e3feaadSNathan ChancellorCC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
9084e3feaadSNathan Chancellorexport CC_AUTO_VAR_INIT_ZERO_ENABLER
9094e3feaadSNathan ChancellorKBUILD_CFLAGS	+= $(CC_AUTO_VAR_INIT_ZERO_ENABLER)
910f0fe00d4Sglider@google.comendif
911f02003c8SKees Cookendif
912f0fe00d4Sglider@google.com
91339218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes
91439218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers.
91539218ff4SKees CookKBUILD_CFLAGS	+= $(call cc-option, -fno-stack-clash-protection)
91639218ff4SKees Cook
917a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
918a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS
919a82adfd5SKees CookKBUILD_CFLAGS	+= -fzero-call-used-regs=used-gpr
920a82adfd5SKees Cookendif
921a82adfd5SKees Cook
922606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
9233b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC
92407d04081SVasily Gorbik  CC_FLAGS_FTRACE	+= -mrecord-mcount
9252f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
9262f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
9272f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
9282f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
9292f4df001SVasily Gorbik    endif
9302f4df001SVasily Gorbik  endif
93107d04081SVasily Gorbikendif
93222c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
933280981d6SSathvika Vasireddy  ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT
93422c8542dSSami Tolvanen    CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
93522c8542dSSami Tolvanen  endif
936280981d6SSathvika Vasireddyendif
9373b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
9383b15cdc1SSami Tolvanen  ifdef CONFIG_HAVE_C_RECORDMCOUNT
9393b15cdc1SSami Tolvanen    BUILD_C_RECORDMCOUNT := y
9403b15cdc1SSami Tolvanen    export BUILD_C_RECORDMCOUNT
9413b15cdc1SSami Tolvanen  endif
9423b15cdc1SSami Tolvanenendif
943a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
9447d73c3e9SNick Desaulniers  # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
945f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
946f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
947f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
948a2546faeSSteven Rostedt  endif
949f28bc3c3SVasily Gorbikendif
950f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
951f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
952f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
95316444a8aSArnaldo Carvalho de Meloendif
95416444a8aSArnaldo Carvalho de Melo
95591341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
95691341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
9577d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-inline-functions-called-once
95891341d4bSSam Ravnborgendif
95991341d4bSSam Ravnborg
9602f7ab126SMiguel Ojeda# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0).
96190ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
962e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
9632f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y
964e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
96590ad4052SMasahiro Yamadaendif
96690ad4052SMasahiro Yamada
967d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK
9689beccca0SArd Biesheuvelifndef CONFIG_DYNAMIC_SCS
969d08b9f0cSSami TolvanenCC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
970d08b9f0cSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
9719beccca0SArd Biesheuvelendif
972d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS
973d08b9f0cSSami Tolvanenendif
974d08b9f0cSSami Tolvanen
975dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG
976dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN
9772b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto=thin -fsplit-lto-unit
9787f69180bSMasahiro YamadaKBUILD_LDFLAGS	+= --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
979dc5723b0SSami Tolvanenelse
9802b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto
981dc5723b0SSami Tolvanenendif
982dc5723b0SSami TolvanenCC_FLAGS_LTO	+= -fvisibility=hidden
98322d429e7SSami Tolvanen
98422d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size
98522d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5
98624845dcbSNick Desaulniers
9870236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion
9880236526dSTor Vic# when using lld < 13.0.0.
98924845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0)
990fccb3d3eSMasahiro Yamadaifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y)
99124845dcbSNick DesaulniersKBUILD_LDFLAGS	+= -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
99224845dcbSNick Desaulniersendif
993dc5723b0SSami Tolvanenendif
9940236526dSTor Vicendif
995dc5723b0SSami Tolvanen
996dc5723b0SSami Tolvanenifdef CONFIG_LTO
9975e95325fSSami TolvanenKBUILD_CFLAGS	+= -fno-lto $(CC_FLAGS_LTO)
9985e95325fSSami TolvanenKBUILD_AFLAGS	+= -fno-lto
999dc5723b0SSami Tolvanenexport CC_FLAGS_LTO
1000dc5723b0SSami Tolvanenendif
1001dc5723b0SSami Tolvanen
1002cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG
100389245600SSami TolvanenCC_FLAGS_CFI	:= -fsanitize=kcfi
1004cf68fffbSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_CFI)
1005cf68fffbSSami Tolvanenexport CC_FLAGS_CFI
1006cf68fffbSSami Tolvanenendif
1007cf68fffbSSami Tolvanen
1008d49a0626SPeter Zijlstraifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)
1009d49a0626SPeter ZijlstraKBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT)
101009c60546SFeng Tangendif
101109c60546SFeng Tang
1012e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
101304e85bbfSAlexey DobriyanNOSTDINC_FLAGS += -nostdinc
1014e8e69931SSam Ravnborg
10151da177e4SLinus Torvalds# warn about C99 declaration after statement
1016a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
10171da177e4SLinus Torvalds
10180bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
10198289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
10200bb95f80SKees Cook
1021070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
1022fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
10231da177e4SLinus Torvalds
1024552a23a0SGustavo A. R. Silva# In order to make sure new function cast mismatches are not introduced
1025552a23a0SGustavo A. R. Silva# in the kernel (to avoid tripping CFI checking), the kernel should be
1026552a23a0SGustavo A. R. Silva# globally built with -Wcast-function-type.
1027552a23a0SGustavo A. R. SilvaKBUILD_CFLAGS += $(call cc-option, -Wcast-function-type)
1028552a23a0SGustavo A. R. Silva
1029217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
1030217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
1031217c3e01SStephen Rothwell
10325c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
10335a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
10345c45de21SLinus Torvalds
1035adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
1036adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
1037adc71920SLinus Torvalds
103878a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
10397d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
10407d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized
10417d73c3e9SNick Desaulniersendif
104278a5255fSLinus Torvalds
104386cffecdSKees Cook# The allocators already balk at large sizes, so silence the compiler
104486cffecdSKees Cook# warnings for bounds checks involving those possible values. While
104586cffecdSKees Cook# -Wno-alloc-size-larger-than would normally be used here, earlier versions
104686cffecdSKees Cook# of gcc (<9.1) weirdly don't handle the option correctly when _other_
104786cffecdSKees Cook# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX
104886cffecdSKees Cook# doesn't work (as it is documented to), silently resolving to "0" prior to
104986cffecdSKees Cook# version 9.1 (and producing an error more recently). Numeric values larger
105086cffecdSKees Cook# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently
105186cffecdSKees Cook# ignored, continuing to default to PTRDIFF_MAX. So, left with no other
105286cffecdSKees Cook# choice, we must perform a versioned check to disable this warning.
105386cffecdSKees Cook# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
105488b61e3bSNick DesaulniersKBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than
105588b61e3bSNick DesaulniersKBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
105686cffecdSKees Cook
1057fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
10588b42cf2fSMasahiro YamadaKBUILD_CFLAGS	+= -fno-strict-overflow
1059d0115552SLinus Torvalds
10603ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
10617d4eb0d8SMasahiro YamadaKBUILD_CFLAGS  += -fno-stack-check
10623ce120b1SLinus Torvalds
10638f7f5c9fSAndi Kleen# conserve stack if available
10647d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
10657d73c3e9SNick DesaulniersKBUILD_CFLAGS   += -fconserve-stack
10667d73c3e9SNick Desaulniersendif
10678f7f5c9fSAndi Kleen
1068fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
106987de84c9SMasahiro YamadaKBUILD_CFLAGS   += -Werror=date-time
1070fe7c36c7SJosh Triplett
1071ea8daa7bSDaniel Wagner# enforce correct pointer usage
1072ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
1073ea8daa7bSDaniel Wagner
1074c834f0e8SKees Cook# Require designated initializers for all marked structures
1075c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
1076c834f0e8SKees Cook
1077a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
1078a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1079a73619a8SMasahiro Yamada
1080e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed
1081e0fe0bbeSMasahiro Yamadainclude-y			:= scripts/Makefile.extrawarn
10826947fd96SMasahiro Yamadainclude-$(CONFIG_DEBUG_INFO)	+= scripts/Makefile.debug
1083e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
1084e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
1085f80be457SAlexander Potapenkoinclude-$(CONFIG_KMSAN)		+= scripts/Makefile.kmsan
1086e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN)		+= scripts/Makefile.ubsan
1087e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV)		+= scripts/Makefile.kcov
1088613f4b3eSKees Cookinclude-$(CONFIG_RANDSTRUCT)	+= scripts/Makefile.randstruct
1089e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS)	+= scripts/Makefile.gcc-plugins
1090e0fe0bbeSMasahiro Yamada
1091e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y))
1092a86fe353SMasahiro Yamada
1093132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last.
1094132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel
1095132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point.
1096bf5438fcSJason Baron
10972f7ab126SMiguel Ojeda# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments
10988cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
10998cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
11008cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
11012f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KRUSTFLAGS)
110252bcc330SSam Ravnborg
1103a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1
1104a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1
110518991197SRoland McGrath
11060d362be5SNick DesaulniersKBUILD_LDFLAGS	+= -z noexecstack
11070d362be5SNick Desaulniersifeq ($(CONFIG_LD_IS_BFD),y)
11080d362be5SNick DesaulniersKBUILD_LDFLAGS	+= $(call ld-option,--no-warn-rwx-segments)
11090d362be5SNick Desaulniersendif
11100d362be5SNick Desaulniers
11115d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
11120f1fe9d6SMasahiro YamadaLDFLAGS_vmlinux	+= -X
11135d7d18f5SDavid Howellsendif
11145d7d18f5SDavid Howells
11155cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
1116ccb2d173SFangrui Song# ld.lld before 15 did not support -z pack-relative-relocs.
1117ccb2d173SFangrui SongLDFLAGS_vmlinux	+= $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs)
11185cf896fbSPeter Collingbourneendif
11195cf896fbSPeter Collingbourne
112059612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the
112159612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script.
112259612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN
1123e1789d7cSXin LiLDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
112459612b24SNathan Chancellorendif
112559612b24SNathan Chancellor
11267f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
11277f58b487SMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
11287f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
11297f3a59dbSMasahiro Yamada
113080591e61SLuc Van Oostenryck# make the checker run with the right architecture
113180591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
113280591e61SLuc Van Oostenryck
113314516765SLuc Van Oostenryck# insure the checker run with the right endianness
113414516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
113514516765SLuc Van Oostenryck
11361f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
11371f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
11381f2f01b1SLuc Van Oostenryck
11391da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
11401da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
11411da177e4SLinus Torvalds# set in the environment
11421da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
11431da177e4SLinus Torvalds# this default value
11441da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
11451da177e4SLinus Torvalds
11461da177e4SLinus Torvalds#
11471da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
11481da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
11491da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
11501da177e4SLinus Torvalds
11511da177e4SLinus Torvalds#
1152f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1153f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1154f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
1155f4d4ffc0SJason Cooper#
1156f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1157f4d4ffc0SJason Cooper
1158f4d4ffc0SJason Cooper#
11591da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
11601da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
1161070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
11621da177e4SLinus Torvalds#
11631da177e4SLinus Torvalds
1164df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
11651da177e4SLinus Torvaldsexport MODLIB
11661da177e4SLinus Torvalds
1167e00d8880SMasahiro YamadaPHONY += prepare0
1168e2a666d5SRusty Russell
1169ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
11707f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order
11717f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
117247801c97SMasahiro Yamada
11731da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
11741da177e4SLinus Torvalds
11755750121aSMasahiro Yamadabuild-dir	:= .
11765750121aSMasahiro Yamadaclean-dirs	:= $(sort . Documentation \
117723febe37SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(core-) \
117895fb6317SMasahiro Yamada			$(drivers-) $(libs-))))
11791da177e4SLinus Torvalds
11805750121aSMasahiro Yamadaexport ARCH_CORE	:= $(core-y)
11815750121aSMasahiro Yamadaexport ARCH_LIB		:= $(filter %/, $(libs-y))
11825750121aSMasahiro Yamadaexport ARCH_DRIVERS	:= $(drivers-y) $(drivers-m)
11831f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
11845750121aSMasahiro Yamada
118532164845SMasahiro YamadaKBUILD_VMLINUX_OBJS := ./built-in.a
1186f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES
1187f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1188f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1189f0d50ca0SMasahiro Yamadaelse
1190f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1191f0d50ca0SMasahiro Yamadaendif
1192f0d50ca0SMasahiro Yamada
119332164845SMasahiro Yamadaexport KBUILD_VMLINUX_LIBS
119495698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
11951da177e4SLinus Torvalds
11962441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
11971f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
11981f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
11991f50b80aSMasahiro YamadaKBUILD_MODULES := 1
12001f50b80aSMasahiro Yamadaendif
12011f50b80aSMasahiro Yamada
120232164845SMasahiro Yamada# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14
120332164845SMasahiro Yamadaquiet_cmd_ar_vmlinux.a = AR      $@
120432164845SMasahiro Yamada      cmd_ar_vmlinux.a = \
120532164845SMasahiro Yamada	rm -f $@; \
120632164845SMasahiro Yamada	$(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
1207fb3041d6SMasahiro Yamada	$(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
1208fbe6e37dSNicholas Piggin
120932164845SMasahiro Yamadatargets += vmlinux.a
1210*5e9e95ccSMasahiro Yamadavmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE
121132164845SMasahiro Yamada	$(call if_changed,ar_vmlinux.a)
12122441e78bSNicolas Pitre
12137a342e6cSMasahiro YamadaPHONY += vmlinux_o
12147a342e6cSMasahiro Yamadavmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)
12159c5a0ac3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o
1216741f98feSSam Ravnborg
12177a342e6cSMasahiro Yamadavmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o
12187a342e6cSMasahiro Yamada	@:
12197a342e6cSMasahiro Yamada
12205d4aeffbSMasahiro YamadaPHONY += vmlinux
12218debed3eSMasahiro Yamada# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux,
12228debed3eSMasahiro Yamada# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is
12238debed3eSMasahiro Yamada# unrelated; the decompressors just happen to have the same base name,
12248debed3eSMasahiro Yamada# arch/*/boot/compressed/vmlinux.
12258debed3eSMasahiro Yamada# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux.
12268debed3eSMasahiro Yamada#
12278debed3eSMasahiro Yamada# _LDFLAGS_vmlinux is a workaround for the 'private export' bug:
12288debed3eSMasahiro Yamada#   https://savannah.gnu.org/bugs/?61463
12298debed3eSMasahiro Yamada# For Make > 4.4, the following simple code will work:
12308debed3eSMasahiro Yamada#  vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
12318debed3eSMasahiro Yamadavmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
12328debed3eSMasahiro Yamadavmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux)
12335d4aeffbSMasahiro Yamadavmlinux: vmlinux.o $(KBUILD_LDS) modpost
12345d4aeffbSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux
1235392885eeSMasahiro Yamada
12361da177e4SLinus Torvalds# The actual objects are generated when descending,
12371da177e4SLinus Torvalds# make sure no implicit rule kicks in
12389c5a0ac3SMasahiro Yamada$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ;
12391da177e4SLinus Torvalds
12401cb86b6cSMasahiro Yamadaifeq ($(origin KERNELRELEASE),file)
1241ec31f868SMasahiro Yamadafilechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree)
12421cb86b6cSMasahiro Yamadaelse
12431cb86b6cSMasahiro Yamadafilechk_kernel.release = echo $(KERNELRELEASE)
12441cb86b6cSMasahiro Yamadaendif
12450d0e7718SMichal Marek
124683a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
124724512795SMasahiro Yamadainclude/config/kernel.release: FORCE
12480d0e7718SMichal Marek	$(call filechk,kernel.release)
1249cb58455cSSam Ravnborg
1250d8821622SMasahiro Yamada# Additional helpers built in scripts/
1251d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1252d8821622SMasahiro Yamada# in parallel
1253d8821622SMasahiro YamadaPHONY += scripts
125460df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1255d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1256cb58455cSSam Ravnborg
12571da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
12585bb78269SSam Ravnborg# or the modules are listed in "prepare".
12595bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
12605bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
12615bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
12621da177e4SLinus Torvalds
1263a5139fb3SMasahiro YamadaPHONY += prepare archprepare
12645bb78269SSam Ravnborg
126536de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1266*5e9e95ccSMasahiro Yamada	asm-generic $(version_h) include/generated/utsrelease.h \
1267a55f283eSMasahiro Yamada	include/generated/compile.h include/generated/autoconf.h remove-stale-files
12685bb78269SSam Ravnborg
126965bba042SMasahiro Yamadaprepare0: archprepare
127060df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
1271ed7ceac1SMasahiro Yamada	$(Q)$(MAKE) $(build)=. prepare
127286feeaa8SSam Ravnborg
12731da177e4SLinus Torvalds# All the preparing..
12740d989ac2SMasahiro Yamadaprepare: prepare0
12752f7ab126SMiguel Ojedaifdef CONFIG_RUST
12762f7ab126SMiguel Ojeda	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v
12772f7ab126SMiguel Ojeda	$(Q)$(MAKE) $(build)=rust
12782f7ab126SMiguel Ojedaendif
1279b9ab5ebbSJosh Poimboeuf
12801476fee5SMasahiro YamadaPHONY += remove-stale-files
12811476fee5SMasahiro Yamadaremove-stale-files:
12821476fee5SMasahiro Yamada	$(Q)$(srctree)/scripts/remove-stale-files
12831476fee5SMasahiro Yamada
12842c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
12857d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
12867d0e5c20SMasahiro Yamada
12872c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
12882c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1289037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1290037fc336SMasahiro Yamada	generic=include/asm-generic
12912c1f4f12SMasahiro Yamadauapi-asm-generic:
1292037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1293037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
12942c1f4f12SMasahiro Yamada
12951da177e4SLinus Torvalds# Generate some files
12961da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12971da177e4SLinus Torvalds
12981da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
12991da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
13001da177e4SLinus Torvalds
13011da177e4SLinus Torvaldsuts_len := 64
130263104eecSSam Ravnborgdefine filechk_utsrelease.h
13031da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
13041da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
13051da177e4SLinus Torvalds	  exit 1;                                                         \
13061da177e4SLinus Torvalds	fi;                                                               \
1307ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
13081da177e4SLinus Torvaldsendef
13091da177e4SLinus Torvalds
131063104eecSSam Ravnborgdefine filechk_version.h
13119b82f13eSSasha Levin	if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1312ad774086SMasahiro Yamada		echo \#define LINUX_VERSION_CODE $(shell                 \
1313207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
13149b82f13eSSasha Levin	else                                                             \
13159b82f13eSSasha Levin		echo \#define LINUX_VERSION_CODE $(shell                 \
1316207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
13179b82f13eSSasha Levin	fi;                                                              \
13189b82f13eSSasha Levin	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
131988a68672SSasha Levin	((c) > 255 ? 255 : (c)))';                                       \
132088a68672SSasha Levin	echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
132188a68672SSasha Levin	echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
132288a68672SSasha Levin	echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
132363104eecSSam Ravnborgendef
132463104eecSSam Ravnborg
13255c816641SMasahiro Yamada$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0)
13265c816641SMasahiro Yamada$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0)
132743fee2b2SMasahiro Yamada$(version_h): FORCE
13281da177e4SLinus Torvalds	$(call filechk,version.h)
13291da177e4SLinus Torvalds
1330273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
133163104eecSSam Ravnborg	$(call filechk,utsrelease.h)
133263104eecSSam Ravnborg
1333a55f283eSMasahiro Yamadafilechk_compile.h = $(srctree)/scripts/mkcompile_h \
1334a55f283eSMasahiro Yamada	"$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)"
1335a55f283eSMasahiro Yamada
1336a55f283eSMasahiro Yamadainclude/generated/compile.h: FORCE
1337a55f283eSMasahiro Yamada	$(call filechk,compile.h)
1338a55f283eSMasahiro Yamada
1339179efcb4SVegard NossumPHONY += headerdep
1340179efcb4SVegard Nossumheaderdep:
13419663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
13429663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1343179efcb4SVegard Nossum
13441da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13458d730cfbSDavid Woodhouse# Kernel headers
13468d730cfbSDavid Woodhouse
1347e6883b18SSam Ravnborg#Default location for installed headers
1348e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1349e6883b18SSam Ravnborg
135059b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
135159b2bd05SMasahiro Yamada      cmd_headers_install = \
135259b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
135359b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
135459b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
13556d716275SDavid Woodhouse
13568d730cfbSDavid WoodhousePHONY += headers_install
135759b2bd05SMasahiro Yamadaheaders_install: headers
135859b2bd05SMasahiro Yamada	$(call cmd,headers_install)
13594f193362SPaul Smith
13601da177e4SLinus TorvaldsPHONY += archheaders archscripts
13611da177e4SLinus Torvalds
1362a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
13631da177e4SLinus Torvalds
136459b2bd05SMasahiro YamadaPHONY += headers
136559b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
13661b620d53SMasahiro Yamada	$(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
1367d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1368d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
13691f85712eSMike Frysinger
1370e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
137159b2bd05SMasahiro Yamadaprepare: headers
1372e949f4c2SMasahiro Yamadaendif
137368475359SDavid Woodhouse
1374bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1375bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1376bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1377bdd7714bSMasahiro Yamada
13788d730cfbSDavid Woodhouse# ---------------------------------------------------------------------------
137914ccc638SMasahiro Yamada# Install
138014ccc638SMasahiro Yamada
138114ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel.
138275ef3122SRandy Dunlap# If DKMS is installed, 'make install' will eventually recurse back
138375ef3122SRandy Dunlap# to this Makefile to build and install external modules.
138414ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
138514ccc638SMasahiro Yamada
1386f774f5bbSMasahiro Yamadaquiet_cmd_install = INSTALL $(INSTALL_PATH)
1387f774f5bbSMasahiro Yamada      cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh
138814ccc638SMasahiro Yamada
138914ccc638SMasahiro Yamada# ---------------------------------------------------------------------------
13901bb0b18aSMasahiro Yamada# Tools
13911bb0b18aSMasahiro Yamada
139203f16cd0SJosh Poimboeufifdef CONFIG_OBJTOOL
13930d989ac2SMasahiro Yamadaprepare: tools/objtool
13940d989ac2SMasahiro Yamadaendif
13950d989ac2SMasahiro Yamada
13960d989ac2SMasahiro Yamadaifdef CONFIG_BPF
13970d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF
13980d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids
13990d989ac2SMasahiro Yamadaendif
14000d989ac2SMasahiro Yamadaendif
14010d989ac2SMasahiro Yamada
14020d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean
14030d989ac2SMasahiro Yamada
14040d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
14050d989ac2SMasahiro Yamada
14060d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist
14070d989ac2SMasahiro Yamada# in output directory, skip its clean in that case
14080d989ac2SMasahiro Yamadaresolve_btfids_clean:
14090d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),)
14100d989ac2SMasahiro Yamada	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
14110d989ac2SMasahiro Yamadaendif
14120d989ac2SMasahiro Yamada
14131bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake
14141bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_)
14151bb0b18aSMasahiro Yamadatools_silent=s
14161bb0b18aSMasahiro Yamadaendif
14171bb0b18aSMasahiro Yamada
14181bb0b18aSMasahiro Yamadatools/: FORCE
14191bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
14201bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
14211bb0b18aSMasahiro Yamada
14221bb0b18aSMasahiro Yamadatools/%: FORCE
14231bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
14241bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
14251bb0b18aSMasahiro Yamada
14261bb0b18aSMasahiro Yamada# ---------------------------------------------------------------------------
14275a5da78bSShuah Khan# Kernel selftest
14285a5da78bSShuah Khan
14295a5da78bSShuah KhanPHONY += kselftest
14304062eba9SGuillaume Tuckerkselftest: headers
14312bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
14325a5da78bSShuah Khan
14334062eba9SGuillaume Tuckerkselftest-%: headers FORCE
143417eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1435dcb825a9SWang Long
14363d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
14373d6dee7aSBamvor Jian Zhangkselftest-merge:
14383d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
14396d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
14406d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
14413e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
14423d6dee7aSBamvor Jian Zhang
14435a5da78bSShuah Khan# ---------------------------------------------------------------------------
144437c8a5faSRob Herring# Devicetree files
144537c8a5faSRob Herring
144637c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
144737c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
144837c8a5faSRob Herringendif
144937c8a5faSRob Herring
145037c8a5faSRob Herringifneq ($(dtstree),)
145137c8a5faSRob Herring
1452ee476203SMasahiro Yamada%.dtb: dtbs_prepare
145375e89534SRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
145437c8a5faSRob Herring
1455ee476203SMasahiro Yamada%.dtbo: dtbs_prepare
145675e89534SRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1457ce88c9c7SViresh Kumar
1458ee476203SMasahiro YamadaPHONY += dtbs dtbs_prepare dtbs_install dtbs_check
1459ee476203SMasahiro Yamadadtbs: dtbs_prepare
146037c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
146137c8a5faSRob Herring
1462ee476203SMasahiro Yamada# include/config/kernel.release is actually needed when installing DTBs because
1463ee476203SMasahiro Yamada# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
1464ee476203SMasahiro Yamada# dtbs_install depend on it as dtbs_install may run as root.
1465ee476203SMasahiro Yamadadtbs_prepare: include/config/kernel.release scripts_dtc
1466ee476203SMasahiro Yamada
146775e89534SRob Herringifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1468e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1469ec201955SRob Herringendif
1470ec201955SRob Herring
1471ec201955SRob Herringifneq ($(CHECK_DTBS),)
1472ec201955SRob Herringdtbs_prepare: dt_binding_check
1473b5154bf6SMasahiro Yamadaendif
1474b5154bf6SMasahiro Yamada
1475b5154bf6SMasahiro Yamadadtbs_check: dtbs
14764f0e3a57SRob Herring
147737c8a5faSRob Herringdtbs_install:
14782431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
147937c8a5faSRob Herring
148037c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
148137c8a5faSRob Herringall: dtbs
148237c8a5faSRob Herringendif
148337c8a5faSRob Herring
148437c8a5faSRob Herringendif
148537c8a5faSRob Herring
148637c8a5faSRob HerringPHONY += scripts_dtc
148737c8a5faSRob Herringscripts_dtc: scripts_basic
148837c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
148937c8a5faSRob Herring
1490e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1491e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1492e10c4321SMasahiro Yamadaendif
1493e10c4321SMasahiro Yamada
1494c473a8d0SMasahiro YamadaPHONY += dt_binding_check
14954f0e3a57SRob Herringdt_binding_check: scripts_dtc
14964f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
14974f0e3a57SRob Herring
1498b6acf807SRob HerringPHONY += dt_compatible_check
1499b6acf807SRob Herringdt_compatible_check: dt_binding_check
1500b6acf807SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@
1501b6acf807SRob Herring
150237c8a5faSRob Herring# ---------------------------------------------------------------------------
15031da177e4SLinus Torvalds# Modules
15041da177e4SLinus Torvalds
15051da177e4SLinus Torvaldsifdef CONFIG_MODULES
15061da177e4SLinus Torvalds
15071da177e4SLinus Torvalds# By default, build modules as well
15081da177e4SLinus Torvalds
150973d1393eSMichal Marekall: modules
15101da177e4SLinus Torvalds
15114b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider
15124b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to
15134b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them.
15144b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS
15154b50c8c4SMasahiro Yamada  KBUILD_BUILTIN := 1
15164b50c8c4SMasahiro Yamadaendif
15174b50c8c4SMasahiro Yamada
15181da177e4SLinus Torvalds# Build modules
1519551559e1STejun Heo#
15201da177e4SLinus Torvalds
1521feb113adSCarlos Llamas# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES
1522f73edc89SMasahiro Yamada# is an exception.
1523f73edc89SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF_MODULES
152474d3320fSMasahiro YamadaKBUILD_BUILTIN := 1
1525f73edc89SMasahiro Yamadamodules: vmlinux
1526f73edc89SMasahiro Yamadaendif
15271da177e4SLinus Torvalds
1528f73edc89SMasahiro Yamadamodules: modules_prepare
1529a6c36632SMichal Marek
15301da177e4SLinus Torvalds# Target to prepare building external modules
1531059bc9fcSMasahiro Yamadamodules_prepare: prepare
1532596b0474SMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
15331da177e4SLinus Torvalds
1534961ab4a3SMasahiro Yamadaexport modules_sign_only :=
15351da177e4SLinus Torvalds
1536961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y)
1537961ab4a3SMasahiro YamadaPHONY += modules_sign
1538961ab4a3SMasahiro Yamadamodules_sign: modules_install
1539961ab4a3SMasahiro Yamada	@:
1540961ab4a3SMasahiro Yamada
1541961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install.
1542961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1543961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),)
1544961ab4a3SMasahiro Yamadamodules_sign_only := y
1545961ab4a3SMasahiro Yamadaendif
1546961ab4a3SMasahiro Yamadaendif
1547961ab4a3SMasahiro Yamada
1548961ab4a3SMasahiro Yamadamodinst_pre :=
1549961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),)
1550961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre
1551961ab4a3SMasahiro Yamadaendif
1552961ab4a3SMasahiro Yamada
1553961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre)
15543e3005dfSMasahiro YamadaPHONY += __modinst_pre
15553e3005dfSMasahiro Yamada__modinst_pre:
15561da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
15571da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
15581da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
15598e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
15601da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
15611da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
15627e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
15631da177e4SLinus Torvalds	fi
1564f65a4868SMasahiro Yamada	@sed 's:^\(.*\)\.o$$:kernel/\1.ko:' modules.order > $(MODLIB)/modules.order
15652c6d9636SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
15662c6d9636SMasahiro Yamada	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
15671da177e4SLinus Torvalds
15681da177e4SLinus Torvaldsendif # CONFIG_MODULES
15691da177e4SLinus Torvalds
15701da177e4SLinus Torvalds###
15711da177e4SLinus Torvalds# Cleaning is done on three levels.
15721da177e4SLinus Torvalds# make clean     Delete most generated files
15731da177e4SLinus Torvalds#                Leave enough to build external modules
15741da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
15751da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
15761da177e4SLinus Torvalds
15771da177e4SLinus Torvalds# Directories & files removed with 'make clean'
157869bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
15793d32285fSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps \
15808afc66e8SLinus Torvalds	       compile_commands.json .thinlto-cache rust/test rust/doc \
15817ea01d31SMaíra Canal	       rust-project.json .vmlinux.objs .vmlinux.export.c
15821da177e4SLinus Torvalds
15831da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
15840663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
1585b0d6207bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .objdiff \
15860663c68cSMasahiro Yamada		  debian snap tar-install \
15870663c68cSMasahiro Yamada		  .config .config.old .version \
158846457133SMasahiro Yamada		  Module.symvers \
15895cca3606SMasahiro Yamada		  certs/signing_key.pem \
1590b31f2a49SNayna Jain		  certs/x509.genkey \
1591b31f2a49SNayna Jain		  vmlinux-gdb.py \
159281f59a26SMasahiro Yamada		  *.spec rpmbuild \
1593c83b16ceSMasahiro Yamada		  rust/libmacros.so
15941da177e4SLinus Torvalds
15951da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
15961da177e4SLinus Torvalds#
15971da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
15981da177e4SLinus Torvalds
159976cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
16001da177e4SLinus Torvalds
1601bd1ee804SPawel Mollvmlinuxclean:
1602bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1603fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1604bd1ee804SPawel Moll
160550d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean
16061da177e4SLinus Torvalds
16071da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
16081da177e4SLinus Torvalds#
16091da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1610cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
16111da177e4SLinus Torvalds
1612b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
16131da177e4SLinus Torvalds$(mrproper-dirs):
16141da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
16151da177e4SLinus Torvalds
1616b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
16171da177e4SLinus Torvalds	$(call cmd,rmfiles)
16182f7ab126SMiguel Ojeda	@find . $(RCS_FIND_IGNORE) \
16192f7ab126SMiguel Ojeda		\( -name '*.rmeta' \) \
16202f7ab126SMiguel Ojeda		-type f -print | xargs rm -f
16211da177e4SLinus Torvalds
16221da177e4SLinus Torvalds# distclean
16231da177e4SLinus Torvalds#
16244f193362SPaul SmithPHONY += distclean
16251da177e4SLinus Torvalds
16261da177e4SLinus Torvaldsdistclean: mrproper
162719c8d912SMasahiro Yamada	@find . $(RCS_FIND_IGNORE) \
16281da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1629f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
16307a02cec5SMasahiro Yamada		-o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
16317a02cec5SMasahiro Yamada		-o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
16321da177e4SLinus Torvalds		-type f -print | xargs rm -f
16331da177e4SLinus Torvalds
16341da177e4SLinus Torvalds
16351da177e4SLinus Torvalds# Packaging of the kernel to various formats
16361da177e4SLinus Torvalds# ---------------------------------------------------------------------------
16371da177e4SLinus Torvalds
1638bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1639000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1640031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1641000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
16421da177e4SLinus Torvalds
16431da177e4SLinus Torvalds# Brief documentation of the typical targets used
16441da177e4SLinus Torvalds# ---------------------------------------------------------------------------
16451da177e4SLinus Torvalds
16465dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1647a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
16485dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
16495dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
16501da177e4SLinus Torvalds
1651fe69b420SMasahiro YamadaPHONY += help
16521da177e4SLinus Torvaldshelp:
16531da177e4SLinus Torvalds	@echo  'Cleaning targets:'
16545ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
16555cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
16565ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
16575cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
16581da177e4SLinus Torvalds	@echo  ''
16591da177e4SLinus Torvalds	@echo  'Configuration targets:'
16601da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
16611da177e4SLinus Torvalds	@echo  ''
16621da177e4SLinus Torvalds	@echo  'Other generic targets:'
16631da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
16641da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
16651da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
16669cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
16671da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
166840ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1669433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1670433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
167162718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
167262718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1673155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1674c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
16751da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
16761da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1677f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
16783f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
16793f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
16803f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
16812fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
168259df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
16832fb9b1bdSSam Ravnborg	 echo  ''
168431b8cc80SRandy Dunlap	@echo  'Static analysers:'
16851da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1686aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1687ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1688295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
168974425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
16907f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
16916ad7cbc0SNathan Huckleberry	@echo  '  clang-analyzer  - Check with clang static analyzer'
16926ad7cbc0SNathan Huckleberry	@echo  '  clang-tidy      - Check with clang-tidy'
169374425eeeSNicolas Palix	@echo  ''
1694eb8305aeSMatthias Maennich	@echo  'Tools:'
1695eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1696eb8305aeSMatthias Maennich	@echo  ''
169731b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1698e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
16995a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
17005a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1701e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1702e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1703e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1704dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1705e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1706e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
17075a5da78bSShuah Khan	@echo  ''
17082f7ab126SMiguel Ojeda	@echo  'Rust targets:'
17092f7ab126SMiguel Ojeda	@echo  '  rustavailable   - Checks whether the Rust toolchain is'
17102f7ab126SMiguel Ojeda	@echo  '		    available and, if not, explains why.'
17112f7ab126SMiguel Ojeda	@echo  '  rustfmt	  - Reformat all the Rust code in the kernel'
17122f7ab126SMiguel Ojeda	@echo  '  rustfmtcheck	  - Checks if all the Rust code in the kernel'
17132f7ab126SMiguel Ojeda	@echo  '		    is formatted, printing a diff otherwise.'
17142f7ab126SMiguel Ojeda	@echo  '  rustdoc	  - Generate Rust documentation'
17152f7ab126SMiguel Ojeda	@echo  '		    (requires kernel .config)'
17162f7ab126SMiguel Ojeda	@echo  '  rusttest        - Runs the Rust tests'
17172f7ab126SMiguel Ojeda	@echo  '                    (requires kernel .config; downloads external repos)'
17182f7ab126SMiguel Ojeda	@echo  '  rust-analyzer	  - Generate rust-project.json rust-analyzer support file'
17192f7ab126SMiguel Ojeda	@echo  '		    (requires kernel .config)'
17202f7ab126SMiguel Ojeda	@echo  '  dir/file.[os]   - Build specified target only'
17212f7ab126SMiguel Ojeda	@echo  '  dir/file.rsi    - Build macro expanded source, similar to C preprocessing.'
17222f7ab126SMiguel Ojeda	@echo  '                    Run with RUSTFMT=n to skip reformatting if needed.'
17232f7ab126SMiguel Ojeda	@echo  '                    The output is not intended to be compilable.'
17242f7ab126SMiguel Ojeda	@echo  '  dir/file.ll     - Build the LLVM assembly file'
17252f7ab126SMiguel Ojeda	@echo  ''
172637c8a5faSRob Herring	@$(if $(dtstree), \
172737c8a5faSRob Herring		echo 'Devicetree:'; \
172837c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
172937c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
17307aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
17317aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
173237c8a5faSRob Herring		echo '')
173337c8a5faSRob Herring
173431b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
173531b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
173631b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
173731b8cc80SRandy Dunlap	@echo  ''
17381da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1739000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
17401da177e4SLinus Torvalds	@echo  ''
17411da177e4SLinus Torvalds	@echo  'Documentation targets:'
1742cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
17431da177e4SLinus Torvalds	@echo  ''
174401dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
17455c816641SMasahiro Yamada	@$(or $(archhelp),\
174601dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
17471da177e4SLinus Torvalds	@echo  ''
17481da177e4SLinus Torvalds	@$(if $(boards), \
17491da177e4SLinus Torvalds		$(foreach b, $(boards), \
17504234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
17511da177e4SLinus Torvalds		echo '')
17525dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
17535dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
17545dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
17555dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
17565dffbe81SSegher Boessenkool		echo '')
17571da177e4SLinus Torvalds
175883d98d73SMasahiro Yamada	@echo  '  make V=n   [targets] 1: verbose build'
17596ae4b986SMasahiro Yamada	@echo  '                       2: give reason for rebuild of target'
17606ae4b986SMasahiro Yamada	@echo  '                       V=1 and V=2 can be combined with V=12'
17611da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1762a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1763a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1764701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1765af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1766e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
176728bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
176828bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
176928bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1770c77d06e7SYann Droneaud	@echo  '		e: warnings are being treated as errors'
1771a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
1772ec201955SRob Herring	@$(if $(dtstree), \
1773ec201955SRob Herring		echo '  make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \
1774ec201955SRob Herring		echo '         This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \
1775ec201955SRob Herring		)
17761da177e4SLinus Torvalds	@echo  ''
17771da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
17781da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
17791da177e4SLinus Torvalds
17801da177e4SLinus Torvalds
17815dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
17825dffbe81SSegher Boessenkool
17835dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
17845dffbe81SSegher Boessenkool
1785fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
17865dffbe81SSegher Boessenkool
17875dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
17885dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
17895dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
17905dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
17915dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
17925dffbe81SSegher Boessenkool		echo '')
17935dffbe81SSegher Boessenkool
17945dffbe81SSegher Boessenkool
17951da177e4SLinus Torvalds# Documentation targets
17961da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1797e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
17981f050e90SMaxim Cournoyer	       linkcheckdocs dochelp refcheckdocs texinfodocs infodocs
179922cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1800bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1801cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
18021da177e4SLinus Torvalds
18032f7ab126SMiguel Ojeda
18042f7ab126SMiguel Ojeda# Rust targets
18052f7ab126SMiguel Ojeda# ---------------------------------------------------------------------------
18062f7ab126SMiguel Ojeda
18072f7ab126SMiguel Ojeda# "Is Rust available?" target
18082f7ab126SMiguel OjedaPHONY += rustavailable
18092f7ab126SMiguel Ojedarustavailable:
18102f7ab126SMiguel Ojeda	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!"
18112f7ab126SMiguel Ojeda
18122f7ab126SMiguel Ojeda# Documentation target
18132f7ab126SMiguel Ojeda#
18142f7ab126SMiguel Ojeda# Using the singular to avoid running afoul of `no-dot-config-targets`.
18152f7ab126SMiguel OjedaPHONY += rustdoc
18162f7ab126SMiguel Ojedarustdoc: prepare
18172f7ab126SMiguel Ojeda	$(Q)$(MAKE) $(build)=rust $@
18182f7ab126SMiguel Ojeda
18192f7ab126SMiguel Ojeda# Testing target
18202f7ab126SMiguel OjedaPHONY += rusttest
18212f7ab126SMiguel Ojedarusttest: prepare
18222f7ab126SMiguel Ojeda	$(Q)$(MAKE) $(build)=rust $@
18232f7ab126SMiguel Ojeda
18242f7ab126SMiguel Ojeda# Formatting targets
18252f7ab126SMiguel OjedaPHONY += rustfmt rustfmtcheck
18262f7ab126SMiguel Ojeda
18272f7ab126SMiguel Ojeda# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream.
18282f7ab126SMiguel Ojeda#
18292f7ab126SMiguel Ojeda# We match using absolute paths since `find` does not resolve them
18302f7ab126SMiguel Ojeda# when matching, which is a problem when e.g. `srctree` is `..`.
18312f7ab126SMiguel Ojeda# We `grep` afterwards in order to remove the directory entry itself.
18322f7ab126SMiguel Ojedarustfmt:
18332f7ab126SMiguel Ojeda	$(Q)find $(abs_srctree) -type f -name '*.rs' \
18342f7ab126SMiguel Ojeda		-o -path $(abs_srctree)/rust/alloc -prune \
18352f7ab126SMiguel Ojeda		-o -path $(abs_objtree)/rust/test -prune \
18362f7ab126SMiguel Ojeda		| grep -Fv $(abs_srctree)/rust/alloc \
18372f7ab126SMiguel Ojeda		| grep -Fv $(abs_objtree)/rust/test \
18382f7ab126SMiguel Ojeda		| grep -Fv generated \
18392f7ab126SMiguel Ojeda		| xargs $(RUSTFMT) $(rustfmt_flags)
18402f7ab126SMiguel Ojeda
18412f7ab126SMiguel Ojedarustfmtcheck: rustfmt_flags = --check
18422f7ab126SMiguel Ojedarustfmtcheck: rustfmt
18432f7ab126SMiguel Ojeda
18442f7ab126SMiguel Ojeda# IDE support targets
18452f7ab126SMiguel OjedaPHONY += rust-analyzer
18462f7ab126SMiguel Ojedarust-analyzer:
18472f7ab126SMiguel Ojeda	$(Q)$(MAKE) $(build)=rust $@
18482f7ab126SMiguel Ojeda
184967274c08SMasahiro Yamada# Misc
185067274c08SMasahiro Yamada# ---------------------------------------------------------------------------
185167274c08SMasahiro Yamada
185291ecf7ffSMasahiro YamadaPHONY += misc-check
185391ecf7ffSMasahiro Yamadamisc-check:
185491ecf7ffSMasahiro Yamada	$(Q)$(srctree)/scripts/misc-check
185591ecf7ffSMasahiro Yamada
185691ecf7ffSMasahiro Yamadaall: misc-check
185791ecf7ffSMasahiro Yamada
185867274c08SMasahiro YamadaPHONY += scripts_gdb
18597a739ce5SMasahiro Yamadascripts_gdb: prepare0
18601e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
18618d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
186267274c08SMasahiro Yamada
186367274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
186467274c08SMasahiro Yamadaall: scripts_gdb
186567274c08SMasahiro Yamadaendif
186667274c08SMasahiro Yamada
18671da177e4SLinus Torvaldselse # KBUILD_EXTMOD
18681da177e4SLinus Torvalds
1869c753ccb2STzafrir Cohenfilechk_kernel.release = echo $(KERNELRELEASE)
1870c753ccb2STzafrir Cohen
18711da177e4SLinus Torvalds###
18721da177e4SLinus Torvalds# External module support.
18731da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
18741da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
18751da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
187611122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used.
18771da177e4SLinus Torvalds
18786212804fSMasahiro Yamada# We are always building only modules.
18796212804fSMasahiro YamadaKBUILD_BUILTIN :=
18801da177e4SLinus TorvaldsKBUILD_MODULES := 1
18811da177e4SLinus Torvalds
18825750121aSMasahiro Yamadabuild-dir := $(KBUILD_EXTMOD)
18833d32285fSMasahiro Yamada
18847f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json
18853d32285fSMasahiro YamadaPHONY += compile_commands.json
18863d32285fSMasahiro Yamada
188776cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
18883d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1889dc5723b0SSami Tolvanen	$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
18901da177e4SLinus Torvalds
18916072b2c4SMasahiro YamadaPHONY += prepare
18926072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations
18936072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
18946072b2c4SMasahiro Yamadaprepare:
1895129ab0d2SMasahiro Yamada	@if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \
18966072b2c4SMasahiro Yamada		echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
1897129ab0d2SMasahiro Yamada		echo >&2 "  The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \
18986072b2c4SMasahiro Yamada		echo >&2 "  You are using:           $(CC_VERSION_TEXT)"; \
18996072b2c4SMasahiro Yamada	fi
19006072b2c4SMasahiro Yamada
1901fe69b420SMasahiro YamadaPHONY += help
19021da177e4SLinus Torvaldshelp:
19031da177e4SLinus Torvalds	@echo  '  Building external modules.'
19041da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
19051da177e4SLinus Torvalds	@echo  ''
19061da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
19071da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
19081da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
19091da177e4SLinus Torvalds	@echo  ''
191006300b21SSam Ravnborg
19111da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
19121da177e4SLinus Torvalds
19133e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
19143e3005dfSMasahiro Yamada# Modules
19153e3005dfSMasahiro Yamada
19167f371813SMasahiro YamadaPHONY += modules modules_install modules_prepare
19173e3005dfSMasahiro Yamada
19183e3005dfSMasahiro Yamadaifdef CONFIG_MODULES
19193e3005dfSMasahiro Yamada
19205750121aSMasahiro Yamada$(MODORDER): $(build-dir)
19215750121aSMasahiro Yamada	@:
19225750121aSMasahiro Yamada
1923f73edc89SMasahiro Yamada# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
1924f73edc89SMasahiro Yamada# This is solely useful to speed up test compiles.
1925f73edc89SMasahiro Yamadamodules: modpost
1926f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1)
1927f73edc89SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
1928f73edc89SMasahiro Yamadaendif
19293e3005dfSMasahiro Yamada
19301a998be6SMasahiro YamadaPHONY += modules_check
19311a998be6SMasahiro Yamadamodules_check: $(MODORDER)
19321a998be6SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
19331a998be6SMasahiro Yamada
19343ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD  $(MODLIB)
19353e3005dfSMasahiro Yamada      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
19363e3005dfSMasahiro Yamada                   $(KERNELRELEASE)
19373e3005dfSMasahiro Yamada
19383e3005dfSMasahiro Yamadamodules_install:
19393e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
19403e3005dfSMasahiro Yamada	$(call cmd,depmod)
19413e3005dfSMasahiro Yamada
19423e3005dfSMasahiro Yamadaelse # CONFIG_MODULES
19433e3005dfSMasahiro Yamada
19443e3005dfSMasahiro Yamada# Modules not configured
19453e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
19463e3005dfSMasahiro Yamada
19473e3005dfSMasahiro Yamadamodules modules_install:
19483e3005dfSMasahiro Yamada	@echo >&2 '***'
19493e3005dfSMasahiro Yamada	@echo >&2 '*** The present kernel configuration has modules disabled.'
19503e3005dfSMasahiro Yamada	@echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
19513e3005dfSMasahiro Yamada	@echo >&2 '*** to enable CONFIG_MODULES.'
19523e3005dfSMasahiro Yamada	@echo >&2 '***'
19533e3005dfSMasahiro Yamada	@exit 1
19543e3005dfSMasahiro Yamada
1955f110e5a2SMasahiro YamadaKBUILD_MODULES :=
1956f110e5a2SMasahiro Yamada
19573e3005dfSMasahiro Yamadaendif # CONFIG_MODULES
19583e3005dfSMasahiro Yamada
1959f73edc89SMasahiro YamadaPHONY += modpost
1960f73edc89SMasahiro Yamadamodpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \
1961f73edc89SMasahiro Yamada	 $(if $(KBUILD_MODULES), modules_check)
1962f73edc89SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1963f73edc89SMasahiro Yamada
1964b1fbfcb4SMasahiro Yamada# Single targets
1965b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1966b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1967b1fbfcb4SMasahiro Yamada#
1968b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1969b1fbfcb4SMasahiro Yamada#
1970b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1971b1fbfcb4SMasahiro Yamada#
1972b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1973b1fbfcb4SMasahiro Yamada#
1974b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1975b1fbfcb4SMasahiro Yamada
1976b1fbfcb4SMasahiro Yamadaifdef single-build
1977b1fbfcb4SMasahiro Yamada
1978b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1979b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1980fc93a4cdSMasahiro Yamadasingle-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
1981fc93a4cdSMasahiro Yamada		$(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
1982b1fbfcb4SMasahiro Yamada
1983f73edc89SMasahiro Yamada$(single-ko): single_modules
1984b1fbfcb4SMasahiro Yamada	@:
19855750121aSMasahiro Yamada$(single-no-ko): $(build-dir)
1986b1fbfcb4SMasahiro Yamada	@:
1987b1fbfcb4SMasahiro Yamada
1988f110e5a2SMasahiro Yamada# Remove MODORDER when done because it is not the real one.
1989f73edc89SMasahiro YamadaPHONY += single_modules
1990f73edc89SMasahiro Yamadasingle_modules: $(single-no-ko) modules_prepare
1991a53da43dSMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER)
1992b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1993f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1)
1994f73edc89SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
1995f73edc89SMasahiro Yamadaendif
1996f110e5a2SMasahiro Yamada	$(Q)rm -f $(MODORDER)
1997b1fbfcb4SMasahiro Yamada
19985750121aSMasahiro Yamadasingle-goals := $(addprefix $(build-dir)/, $(single-no-ko))
1999b1fbfcb4SMasahiro Yamada
20003753af77SMasahiro YamadaKBUILD_MODULES := 1
20013753af77SMasahiro Yamada
2002b1fbfcb4SMasahiro Yamadaendif
2003b1fbfcb4SMasahiro Yamada
2004c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
2005c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
2006c99f3918SMasahiro Yamada# make menuconfig etc.
2007c99f3918SMasahiro Yamada# Error messages still appears in the original language
20085750121aSMasahiro YamadaPHONY += $(build-dir)
20095750121aSMasahiro Yamada$(build-dir): prepare
20105750121aSMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals)
2011c99f3918SMasahiro Yamada
201276cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
201376cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
201476cd306dSMasahiro Yamada$(clean-dirs):
201576cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
201676cd306dSMasahiro Yamada
201788d7be03SMichal Marekclean: $(clean-dirs)
201888d7be03SMichal Marek	$(call cmd,rmfiles)
20195c816641SMasahiro Yamada	@find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
20202f7ab126SMiguel Ojeda		\( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
20214f0e3a57SRob Herring		-o -name '*.ko.*' \
2022dcad240cSAndrew Davis		-o -name '*.dtb' -o -name '*.dtbo' \
2023dcad240cSAndrew Davis		-o -name '*.dtb.S' -o -name '*.dtbo.S' \
2024dcad240cSAndrew Davis		-o -name '*.dt.yaml' \
2025ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
2026*5e9e95ccSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
202788d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
20289a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
20294fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
203088d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
20316b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
2032433db3e2SVinícius Tinti		-o -name '*.ll' \
203338e89184SSami Tolvanen		-o -name '*.gcno' \
20349c73bcfaSThomas Weißschuh		-o -name '*.*.symversions' \) -type f -print \
20359c73bcfaSThomas Weißschuh		-o -name '.tmp_*' -print \
20369c73bcfaSThomas Weißschuh		| xargs rm -rf
203788d7be03SMichal Marek
20381da177e4SLinus Torvalds# Generate tags for editors
20391da177e4SLinus Torvalds# ---------------------------------------------------------------------------
2040a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
2041858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
20421da177e4SLinus Torvalds
2043f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
20441da177e4SLinus Torvalds	$(call cmd,tags)
20451da177e4SLinus Torvalds
2046eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
2047eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
2048eb8305aeSMatthias Maennich
2049eb8305aeSMatthias MaennichPHONY += nsdeps
2050bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
2051eb8305aeSMatthias Maennichnsdeps: modules
2052bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
2053eb8305aeSMatthias Maennich
20543d32285fSMasahiro Yamada# Clang Tooling
20553d32285fSMasahiro Yamada# ---------------------------------------------------------------------------
20563d32285fSMasahiro Yamada
20573d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN     $@
20583d32285fSMasahiro Yamada      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
20593d32285fSMasahiro Yamada
20607f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
206132164845SMasahiro Yamada	$(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \
20623d32285fSMasahiro Yamada	$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
20633d32285fSMasahiro Yamada	$(call if_changed,gen_compile_commands)
20643d32285fSMasahiro Yamada
20657f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json
20663d32285fSMasahiro Yamada
20676ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer
20686ad7cbc0SNathan Huckleberry
20696ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG
20706ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK   $<
20716ad7cbc0SNathan Huckleberry      cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
20726ad7cbc0SNathan Huckleberry
20737f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
20746ad7cbc0SNathan Huckleberry	$(call cmd,clang_tools)
20756ad7cbc0SNathan Huckleberryelse
20766ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer:
20776ad7cbc0SNathan Huckleberry	@echo "$@ requires CC=clang" >&2
20786ad7cbc0SNathan Huckleberry	@false
20796ad7cbc0SNathan Huckleberryendif
20806ad7cbc0SNathan Huckleberry
20811da177e4SLinus Torvalds# Scripts to check various things for consistency
20821da177e4SLinus Torvalds# ---------------------------------------------------------------------------
20831da177e4SLinus Torvalds
20847dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report
2085279f3dd3SPeter Foley
20861da177e4SLinus Torvaldsincludecheck:
2087436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
20881da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
208980007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
20901da177e4SLinus Torvalds
20911da177e4SLinus Torvaldsversioncheck:
20922ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
20931da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
209480007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
20951da177e4SLinus Torvalds
209674425eeeSNicolas Palixcoccicheck:
2097858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
209874425eeeSNicolas Palix
2099295ac051SAdrian Bunkexport_report:
2100295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
2101295ac051SAdrian Bunk
2102c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
2103e3ccf6e3SJeff Dike
2104011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
2105011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
2106011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
2107011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
2108011e3a9aSJeff Dikeifeq ($(ARCH), um)
2109011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
2110011e3a9aSJeff Dikeelse
2111011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
2112011e3a9aSJeff Dikeendif
21131da177e4SLinus Torvaldscheckstack:
21141da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
211575dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
21161da177e4SLinus Torvalds
21177b8ea53dSAmerigo Wangkernelrelease:
21181cb86b6cSMasahiro Yamada	@$(filechk_kernel.release)
211901ab1788SAmerigo Wang
2120cb58455cSSam Ravnborgkernelversion:
21212244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
21221da177e4SLinus Torvalds
2123c398ff00SMike Marciniszynimage_name:
2124c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
2125c398ff00SMike Marciniszyn
21261da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
21270663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
21281da177e4SLinus Torvalds
2129392885eeSMasahiro Yamada# read saved command lines for existing targets
2130392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
21311da177e4SLinus Torvalds
2132b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
21331da177e4SLinus Torvalds
213446b7c492SSZ Lin (林上智)endif # config-build
21352042b548SMasahiro Yamadaendif # mixed-build
2136688931a5SMasahiro Yamadaendif # need-sub-make
21371da177e4SLinus Torvalds
21384f193362SPaul SmithPHONY += FORCE
21391da177e4SLinus TorvaldsFORCE:
21404f193362SPaul Smith
2141bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
2142fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
21434f193362SPaul Smith.PHONY: $(PHONY)
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