xref: /openbmc/linux/Makefile (revision 9741e07ece7c247dd65e1aa01e16b683f01c05a8)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
36880fa6cSLinus TorvaldsPATCHLEVEL = 15
455922c9dSLinus TorvaldsSUBLEVEL = 0
55816b3e6SLinus TorvaldsEXTRAVERSION = -rc3
613311e74SLinus TorvaldsNAME = Opossums on Parade
71da177e4SLinus Torvalds
81da177e4SLinus Torvalds# *DOCUMENTATION*
91da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
101da177e4SLinus Torvalds# More info can be located in ./README
111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
131da177e4SLinus Torvalds
14121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \
15121c2a13SMasahiro Yamada	$(error targets prefixed with '__' are only for internal use))
16121c2a13SMasahiro Yamada
17ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
18121c2a13SMasahiro YamadaPHONY := __all
19121c2a13SMasahiro Yamada__all:
20ba634eceSMasahiro Yamada
211da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
221da177e4SLinus Torvalds# to get the ordering right.
231da177e4SLinus Torvalds#
241da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
251da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
261da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
27f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
281da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
291da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
301da177e4SLinus Torvalds# is now up to date.
311da177e4SLinus Torvalds#
321da177e4SLinus Torvalds# The only cases where we need to modify files which have global
331da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
341da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
351da177e4SLinus Torvalds# prepare rule.
361da177e4SLinus Torvalds
37221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
383812b8c5SMasahiro Yamada
393812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
403812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
413812b8c5SMasahiro YamadaMAKEFLAGS += -rR
423812b8c5SMasahiro Yamada
433812b8c5SMasahiro Yamada# Avoid funny character set dependencies
443812b8c5SMasahiro Yamadaunexport LC_ALL
453812b8c5SMasahiro YamadaLC_COLLATE=C
463812b8c5SMasahiro YamadaLC_NUMERIC=C
473812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
483812b8c5SMasahiro Yamada
493812b8c5SMasahiro Yamada# Avoid interference with shell env settings
503812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
513812b8c5SMasahiro Yamada
52066b7ed9SMichal Marek# Beautify output
53066b7ed9SMichal Marek# ---------------------------------------------------------------------------
54066b7ed9SMichal Marek#
55066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
56066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
57066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
58066b7ed9SMichal Marek#
59066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
60066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
61066b7ed9SMichal Marek#
62066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
63066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
64066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
65066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
66066b7ed9SMichal Marek#
67066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
68066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
69066b7ed9SMichal Marek#
70066b7ed9SMichal Marek#	$(Q)ln $@ :<
71066b7ed9SMichal Marek#
72066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
73066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
74505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
75066b7ed9SMichal Marek#
761da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
771da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
781da177e4SLinus Torvalds
791da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
801da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
811da177e4SLinus Torvaldsendif
821da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
831da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
841da177e4SLinus Torvaldsendif
851da177e4SLinus Torvalds
86066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
87066b7ed9SMichal Marek  quiet =
88066b7ed9SMichal Marek  Q =
89066b7ed9SMichal Marekelse
90066b7ed9SMichal Marek  quiet=quiet_
91066b7ed9SMichal Marek  Q = @
92066b7ed9SMichal Marekendif
93066b7ed9SMichal Marek
94066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
95066b7ed9SMichal Marek# commands
96066b7ed9SMichal Marek
976f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
98066b7ed9SMichal Marek  quiet=silent_
9922149454SMasahiro Yamada  KBUILD_VERBOSE = 0
100066b7ed9SMichal Marekendif
101066b7ed9SMichal Marek
102066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
103066b7ed9SMichal Marek
104bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
105bcf637f5SMasahiro Yamada# C compilation.
106bcf637f5SMasahiro Yamada#
107bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
108bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
109bcf637f5SMasahiro Yamada# of whether they are re-compiled or not.
110bcf637f5SMasahiro Yamada#
111bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details,
112bcf637f5SMasahiro Yamada# including where to get the "sparse" utility.
113bcf637f5SMasahiro Yamada
114bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line")
115bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
116bcf637f5SMasahiro Yamadaendif
117bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC
118bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = 0
119bcf637f5SMasahiro Yamadaendif
120bcf637f5SMasahiro Yamada
121bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC
122bcf637f5SMasahiro Yamada
123bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
124bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
125bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line")
126bcf637f5SMasahiro Yamada  KBUILD_EXTMOD := $(M)
127bcf637f5SMasahiro Yamadaendif
128bcf637f5SMasahiro Yamada
129bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \
130bcf637f5SMasahiro Yamada	$(error building multiple external modules is not supported))
131bcf637f5SMasahiro Yamada
13274ee585bSMasahiro Yamada# Remove trailing slashes
13374ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),)
13474ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
13574ee585bSMasahiro Yamadaendif
13674ee585bSMasahiro Yamada
137bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD
138bcf637f5SMasahiro Yamada
13925b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
14025b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
14125b146c5SMasahiro Yamada#
14225b146c5SMasahiro Yamada# For example, you can do this:
14325b146c5SMasahiro Yamada#
14425b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
14525b146c5SMasahiro Yamada#
14625b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
14725b146c5SMasahiro Yamada# two syntaxes to specify it.
14825b146c5SMasahiro Yamada#
1491da177e4SLinus Torvalds# 1) O=
1501da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1511da177e4SLinus Torvalds#
1521da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
15325b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
15425b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1551da177e4SLinus Torvalds#
1561da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1571da177e4SLinus Torvalds# variable.
1581da177e4SLinus Torvalds
15925b146c5SMasahiro Yamada# Do we want to change the working directory?
1601da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1611da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1621da177e4SLinus Torvaldsendif
1631da177e4SLinus Torvalds
16425b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
16525b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
16625b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
16725b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
16825b146c5SMasahiro Yamada$(if $(abs_objtree),, \
16925b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
17025b146c5SMasahiro Yamada
17125b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
17225b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
17325b146c5SMasahiro Yamadaelse
17425b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
17525b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
17625b146c5SMasahiro Yamada
17725b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
17825b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
17925b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
18025b146c5SMasahiro Yamadaelse
18125b146c5SMasahiro Yamadaneed-sub-make := 1
18251193b76SRobert Jarzmikendif
18351193b76SRobert Jarzmik
18430cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST))
18530cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile)))
1861da177e4SLinus Torvalds
18725b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
18825b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
18925b146c5SMasahiro Yamadaendif
19025b146c5SMasahiro Yamada
19125b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
19280463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
19380463f1bSMasahiro Yamada#
194d8285639SMasahiro Yamada# --included-dir is added for backward compatibility, but you should not rely on
195d8285639SMasahiro Yamada# it. Please add $(srctree)/ prefix to include Makefiles in the source tree.
19625b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
19725b146c5SMasahiro Yamadaendif
1983812b8c5SMasahiro Yamada
199688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
200688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
201688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
202688931a5SMasahiro Yamadaneed-sub-make := 1
203688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
20493fdddfeSMasahiro Yamada$(this-makefile): ;
205688931a5SMasahiro Yamadaendif
206688931a5SMasahiro Yamada
20725b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
208221cc2d2SMasahiro Yamadaexport sub_make_done := 1
209221cc2d2SMasahiro Yamada
210688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
211688931a5SMasahiro Yamada
212121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make
2130b35786dSMilton Miller
214121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
21516f89098SCharles Keepax	@:
2160b35786dSMilton Miller
217c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
218121c2a13SMasahiro Yamada__sub-make:
21925b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
2201da177e4SLinus Torvalds
221688931a5SMasahiro Yamadaendif # need-sub-make
222221cc2d2SMasahiro Yamadaendif # sub_make_done
223688931a5SMasahiro Yamada
2241da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
225688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
2261da177e4SLinus Torvalds
2277ff52571SMasahiro Yamada# Do not print "Entering directory ...",
2287ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
2297ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
2307ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
2317ff52571SMasahiro Yamada
23225b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
2339da0763bSMichal Marek        # building in the source tree
2349da0763bSMichal Marek        srctree := .
235051f278eSMasahiro Yamada	building_out_of_srctree :=
2369da0763bSMichal Marekelse
23725b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
2389da0763bSMichal Marek                # building in a subdirectory of the source tree
2399da0763bSMichal Marek                srctree := ..
2409da0763bSMichal Marek        else
24125b146c5SMasahiro Yamada                srctree := $(abs_srctree)
2429da0763bSMichal Marek        endif
243051f278eSMasahiro Yamada	building_out_of_srctree := 1
2449da0763bSMichal Marekendif
2452c1f4f12SMasahiro Yamada
24695fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
24795fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
24895fd3f87SMasahiro Yamadaendif
2492c1f4f12SMasahiro Yamada
2507e1c0477SMichal Marekobjtree		:= .
2516b12de69SMasahiro YamadaVPATH		:= $(srctree)
2521da177e4SLinus Torvalds
253051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
2541da177e4SLinus Torvalds
2552c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2562c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2572c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2582c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2592c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2602c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2612c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2622c1f4f12SMasahiro Yamada
2632c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2642c1f4f12SMasahiro Yamada
26522340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
26622340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2672c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
26859b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
2694623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
2704623980dSDavid Engraf			 outputmakefile
271805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install
272805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed.
273805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \
274805b2e1dSMasahiro Yamada			headers_install modules_install kernelrelease image_name
275993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
276993bdde9SMasahiro Yamada			  image_name
277394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
2782c1f4f12SMasahiro Yamada
2792042b548SMasahiro Yamadaconfig-build	:=
2802042b548SMasahiro Yamadamixed-build	:=
2812042b548SMasahiro Yamadaneed-config	:= 1
282805b2e1dSMasahiro Yamadaneed-compiler	:= 1
283d7942413SMasahiro Yamadamay-sync-config	:= 1
284394053f4SMasahiro Yamadasingle-build	:=
2852c1f4f12SMasahiro Yamada
2862c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2872c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2882042b548SMasahiro Yamada		need-config :=
2892c1f4f12SMasahiro Yamada	endif
2902c1f4f12SMasahiro Yamadaendif
2912c1f4f12SMasahiro Yamada
292805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
293805b2e1dSMasahiro Yamada	ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
294805b2e1dSMasahiro Yamada		need-compiler :=
295805b2e1dSMasahiro Yamada	endif
296805b2e1dSMasahiro Yamadaendif
297805b2e1dSMasahiro Yamada
298d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
299d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
3002042b548SMasahiro Yamada		may-sync-config :=
301d7942413SMasahiro Yamada	endif
302d7942413SMasahiro Yamadaendif
303d7942413SMasahiro Yamada
304d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
3052042b548SMasahiro Yamada	may-sync-config :=
306d7942413SMasahiro Yamadaendif
307d7942413SMasahiro Yamada
3082c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
309efbf9726SMasahiro Yamada        ifneq ($(filter %config,$(MAKECMDGOALS)),)
3102042b548SMasahiro Yamada		config-build := 1
3112c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
3122042b548SMasahiro Yamada			mixed-build := 1
3132c1f4f12SMasahiro Yamada                endif
3142c1f4f12SMasahiro Yamada        endif
3152c1f4f12SMasahiro Yamadaendif
31622340a06SMasahiro Yamada
317394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
318394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
319394053f4SMasahiro Yamada	single-build := 1
320394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
321394053f4SMasahiro Yamada		mixed-build := 1
322394053f4SMasahiro Yamada	endif
323394053f4SMasahiro Yamadaendif
324394053f4SMasahiro Yamada
32522340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
32622340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
32722340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3282042b548SMasahiro Yamada		mixed-build := 1
32922340a06SMasahiro Yamada        endif
33022340a06SMasahiro Yamadaendif
33122340a06SMasahiro Yamada
3322c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3332c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3342c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3352042b548SMasahiro Yamada		mixed-build := 1
3362c1f4f12SMasahiro Yamada        endif
3372c1f4f12SMasahiro Yamadaendif
3382c1f4f12SMasahiro Yamada
3392042b548SMasahiro Yamadaifdef mixed-build
3402c1f4f12SMasahiro Yamada# ===========================================================================
3412c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3422c1f4f12SMasahiro Yamada# Handle them one by one.
3432c1f4f12SMasahiro Yamada
3442c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3452c1f4f12SMasahiro Yamada
346121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one
3472c1f4f12SMasahiro Yamada	@:
3482c1f4f12SMasahiro Yamada
3492c1f4f12SMasahiro Yamada__build_one_by_one:
3502c1f4f12SMasahiro Yamada	$(Q)set -e; \
3512c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3522c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3532c1f4f12SMasahiro Yamada	done
3542c1f4f12SMasahiro Yamada
3552042b548SMasahiro Yamadaelse # !mixed-build
3562c1f4f12SMasahiro Yamada
3573204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include
3582c1f4f12SMasahiro Yamada
3592c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3602c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3612c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3622c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3632c1f4f12SMasahiro Yamada
3643204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include
3651da177e4SLinus Torvalds
3661da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3671da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3681da177e4SLinus Torvalds#
3691da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3701da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3711da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3721da177e4SLinus Torvalds# make ARCH=ia64
3731da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3741da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3751da177e4SLinus Torvalds
3761da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3771da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3781da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3791da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3801da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3811da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3821da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3831da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3842331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3851da177e4SLinus Torvalds
3861da177e4SLinus Torvalds# Architecture as present in compile.h
3871da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3886752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3891da177e4SLinus Torvalds
390d746d647SSam Ravnborg# Additional ARCH settings for x86
391d746d647SSam Ravnborgifeq ($(ARCH),i386)
392d746d647SSam Ravnborg        SRCARCH := x86
393d746d647SSam Ravnborgendif
394d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
395d746d647SSam Ravnborg        SRCARCH := x86
396d746d647SSam Ravnborgendif
39774b469f2SSam Ravnborg
3985e538790SSam Ravnborg# Additional ARCH settings for sparc
399e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
400e69f58c0SNamhyung Kim       SRCARCH := sparc
401e69f58c0SNamhyung Kimendif
402a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
4035e538790SSam Ravnborg       SRCARCH := sparc
404a439fe51SSam Ravnborgendif
4052fb9b1bdSSam Ravnborg
4065f6e0fe0SMasahiro Yamada# Additional ARCH settings for parisc
4075f6e0fe0SMasahiro Yamadaifeq ($(ARCH),parisc64)
4085f6e0fe0SMasahiro Yamada       SRCARCH := parisc
4095f6e0fe0SMasahiro Yamadaendif
4105f6e0fe0SMasahiro Yamada
411f02aa48dSMasahiro Yamadaexport cross_compiling :=
412f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH))
413f02aa48dSMasahiro Yamadacross_compiling := 1
414f02aa48dSMasahiro Yamadaendif
415f02aa48dSMasahiro Yamada
41614cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
41741263fc6SBen Gardinerexport KCONFIG_CONFIG
41814cdd3c4SRoman Zippel
4191da177e4SLinus Torvalds# SHELL used by kbuild
420858805b3SMasahiro YamadaCONFIG_SHELL := sh
4211da177e4SLinus Torvalds
4226d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
4236d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4246d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
425d7f14c66SUwe Kleine-König
426a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
427a0d1c951SMasahiro YamadaHOSTCC	= clang
428a0d1c951SMasahiro YamadaHOSTCXX	= clang++
429a0d1c951SMasahiro Yamadaelse
4301da177e4SLinus TorvaldsHOSTCC	= gcc
4311da177e4SLinus TorvaldsHOSTCXX	= g++
432a0d1c951SMasahiro Yamadaendif
4337f3a59dbSMasahiro Yamada
4347f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
4357f3a59dbSMasahiro Yamada			      -O2 -fomit-frame-pointer -std=gnu89
4367f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS :=
4377f3a59dbSMasahiro Yamada
4387f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS   := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
439735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
440f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
441f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4421da177e4SLinus Torvalds
4431da177e4SLinus Torvalds# Make variables (CC, etc...)
4441da177e4SLinus TorvaldsCPP		= $(CC) -E
445a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
446a0d1c951SMasahiro YamadaCC		= clang
447a0d1c951SMasahiro YamadaLD		= ld.lld
448a0d1c951SMasahiro YamadaAR		= llvm-ar
449a0d1c951SMasahiro YamadaNM		= llvm-nm
450a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
451a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
452a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
453a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
454a0d1c951SMasahiro Yamadaelse
455a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
456a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
4571da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4581da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4591da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4601da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
461eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
462a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
463a0d1c951SMasahiro Yamadaendif
464e83b9f55SAndrii NakryikoPAHOLE		= pahole
465c9a0f3b8SJiri OlsaRESOLVE_BTFIDS	= $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
46673a4f6dbSMasahiro YamadaLEX		= flex
46773a4f6dbSMasahiro YamadaYACC		= bison
4681da177e4SLinus TorvaldsAWK		= awk
469caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
470436e980eSDominique MartinetDEPMOD		= depmod
4711da177e4SLinus TorvaldsPERL		= perl
472e9781b52SMasahiro YamadaPYTHON3		= python3
4731da177e4SLinus TorvaldsCHECK		= sparse
474858805b3SMasahiro YamadaBASH		= bash
475e4a42c82SDenis EfremovKGZIP		= gzip
476e4a42c82SDenis EfremovKBZIP2		= bzip2
477e4a42c82SDenis EfremovKLZOP		= lzop
4788dfb61dcSDenis EfremovLZMA		= lzma
4798dfb61dcSDenis EfremovLZ4		= lz4c
4808dfb61dcSDenis EfremovXZ		= xz
48148f7ddf7SNick TerrellZSTD		= zstd
4828dfb61dcSDenis Efremov
483*9741e07eSJiri OlsaPAHOLE_FLAGS	= $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
484*9741e07eSJiri Olsa
48580a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4866c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4870c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4886588169dSSam RavnborgCFLAGS_MODULE   =
4896588169dSSam RavnborgAFLAGS_MODULE   =
4906588169dSSam RavnborgLDFLAGS_MODULE  =
4911da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4921da177e4SLinus TorvaldsAFLAGS_KERNEL	=
493b36fad65SMichal MarekLDFLAGS_vmlinux =
4941da177e4SLinus Torvalds
495abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
496abbf1590SDavid HowellsUSERINCLUDE    := \
4979d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4989d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
499abbf1590SDavid Howells		-I$(srctree)/include/uapi \
5003308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
501ce6ed1c4SMasahiro Yamada                -include $(srctree)/include/linux/compiler-version.h \
502abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
503abbf1590SDavid Howells
5041da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
5051da177e4SLinus Torvalds# Needed to be compatible with the O= option
506abbf1590SDavid HowellsLINUXINCLUDE    := \
5079d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
5089d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
509051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
510f8224f7fSMasahiro Yamada		-I$(objtree)/include \
511f8224f7fSMasahiro Yamada		$(USERINCLUDE)
5121da177e4SLinus Torvalds
51342a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
514eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
51542a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
516b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
517172aad81SOlaf Hering		   -Werror=return-type -Wno-format-security \
518433dc2ebSMasahiro Yamada		   -std=gnu89
519433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
52080c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
52180c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
5226588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
5236588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
52410df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
525d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
5265241ab4cSMasahiro YamadaCLANG_FLAGS :=
5271da177e4SLinus Torvalds
528aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
529d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
530d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
53148f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
5327bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
5331da177e4SLinus Torvalds
534d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
5350e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
536222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
5376588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
53880c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
539*9741e07eSJiri Olsaexport PAHOLE_FLAGS
5401da177e4SLinus Torvalds
5411da177e4SLinus Torvalds# Files to ignore in find ... statements
5421da177e4SLinus Torvalds
543ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
544ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
545ae63b2d7SPrarit Bhargava			  -prune -o
546450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
547450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
5481da177e4SLinus Torvalds
5491da177e4SLinus Torvalds# ===========================================================================
5501da177e4SLinus Torvalds# Rules shared between *config targets and build targets
5511da177e4SLinus Torvalds
552312a3d09SCao jin# Basic helpers built in scripts/basic/
5534f193362SPaul SmithPHONY += scripts_basic
5541da177e4SLinus Torvaldsscripts_basic:
5551da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
5561da177e4SLinus Torvalds
5574f193362SPaul SmithPHONY += outputmakefile
5582728fcfaSMasahiro Yamadaifdef building_out_of_srctree
559e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
560fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
561fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
562fd5f0cd6SJan Beulich# output directory.
5633a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5643a51ff34SVladimir Kondratiev# ignore whole output directory
5652728fcfaSMasahiro Yamada
5662728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN     Makefile
5672728fcfaSMasahiro Yamada      cmd_makefile = { \
5682728fcfaSMasahiro Yamada	echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
5692728fcfaSMasahiro Yamada	echo "include $(srctree)/Makefile"; \
5702728fcfaSMasahiro Yamada	} > Makefile
5712728fcfaSMasahiro Yamada
5721da177e4SLinus Torvaldsoutputmakefile:
573e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
574e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
575e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
576e8e83a23SMasahiro Yamada		echo >&2 "***"; \
577e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
578e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
579e8e83a23SMasahiro Yamada		echo >&2 "***"; \
580e8e83a23SMasahiro Yamada		false; \
581e8e83a23SMasahiro Yamada	fi
58292979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5832728fcfaSMasahiro Yamada	$(call cmd,makefile)
584156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
585156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
586fd5f0cd6SJan Beulichendif
5871da177e4SLinus Torvalds
588db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
589db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
590db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
591db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade.
5926072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
593db07562aSNick Desaulniers
594db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
5956f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang
596ae6b289aSChris Friesendif
597ae6b289aSChris Fries
59857fd251cSMasahiro Yamada# Include this also for config targets because some architectures need
59957fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE.
600805b2e1dSMasahiro Yamadaifdef need-compiler
60157fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler
602805b2e1dSMasahiro Yamadaendif
60357fd251cSMasahiro Yamada
6042042b548SMasahiro Yamadaifdef config-build
6051da177e4SLinus Torvalds# ===========================================================================
6061da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
6071da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
6081da177e4SLinus Torvalds
6091da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
6101da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
6111da177e4SLinus Torvalds# used for 'make defconfig'
6123204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
613315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
6141da177e4SLinus Torvalds
61536de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
61631110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
61731110ebbSSam Ravnborg
61836de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
6191da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
6201da177e4SLinus Torvalds
6212042b548SMasahiro Yamadaelse #!config-build
6221da177e4SLinus Torvalds# ===========================================================================
6231da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
6241da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
6251da177e4SLinus Torvalds
6262c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
627121c2a13SMasahiro Yamada# but instead __all depend on modules
6282c1f4f12SMasahiro YamadaPHONY += all
6292c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
630121c2a13SMasahiro Yamada__all: all
6312c1f4f12SMasahiro Yamadaelse
632121c2a13SMasahiro Yamada__all: modules
6332c1f4f12SMasahiro Yamadaendif
6342c1f4f12SMasahiro Yamada
6352c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
6362c1f4f12SMasahiro Yamada# Normally, just do built-in.
6372c1f4f12SMasahiro Yamada
6382c1f4f12SMasahiro YamadaKBUILD_MODULES :=
6392c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
6402c1f4f12SMasahiro Yamada
6412c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
6422c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
6434b50c8c4SMasahiro Yamada  KBUILD_BUILTIN :=
6442c1f4f12SMasahiro Yamadaendif
6452c1f4f12SMasahiro Yamada
6462c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
6472c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
6482c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
6492c1f4f12SMasahiro Yamada
6506ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
6512c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6522c1f4f12SMasahiro Yamadaendif
6532c1f4f12SMasahiro Yamada
6542c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6552c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6562c1f4f12SMasahiro Yamadaendif
6572c1f4f12SMasahiro Yamada
6582c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6592c1f4f12SMasahiro Yamada
6602042b548SMasahiro Yamadaifdef need-config
661d93a18f2SMasahiro Yamadainclude include/config/auto.conf
662d93a18f2SMasahiro Yamadaendif
663d93a18f2SMasahiro Yamada
6641da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6651da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
666d92cc4d5SMasahiro Yamadacore-y		:= init/ usr/ arch/$(SRCARCH)/
667f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
668d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
6698b5f4eb3SMasahiro Yamadadrivers-$(CONFIG_NET) += net/
6708b5f4eb3SMasahiro Yamadadrivers-y	+= virt/
6711da177e4SLinus Torvaldslibs-y		:= lib/
6721da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6731da177e4SLinus Torvalds
674315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
675315bab4eSMasahiro Yamada# command line.
676315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
677315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
678315bab4eSMasahiro Yamadaall: vmlinux
679315bab4eSMasahiro Yamada
6807d73c3e9SNick DesaulniersCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage
6817d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
6827d73c3e9SNick DesaulniersCFLAGS_GCOV	+= -fno-tree-loop-im
6837d73c3e9SNick Desaulniersendif
6845aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
685315bab4eSMasahiro Yamada
686b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
687b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
688b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
689b1f4ff74SPaulo Zanoniendif
690b1f4ff74SPaulo Zanoni
6917d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
6927d73c3e9SNick DesaulniersRETPOLINE_CFLAGS	:= $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register)
6937d73c3e9SNick DesaulniersRETPOLINE_VDSO_CFLAGS	:= $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register)
6947d73c3e9SNick Desaulniersendif
6957d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_CLANG
6967d73c3e9SNick DesaulniersRETPOLINE_CFLAGS	:= -mretpoline-external-thunk
6977d73c3e9SNick DesaulniersRETPOLINE_VDSO_CFLAGS	:= -mretpoline
6987d73c3e9SNick Desaulniersendif
699669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
700669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
701669e06b1SMasahiro Yamada
7023204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
703315bab4eSMasahiro Yamada
7042042b548SMasahiro Yamadaifdef need-config
7052042b548SMasahiro Yamadaifdef may-sync-config
706315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
707315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
708315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
709d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
7101da177e4SLinus Torvalds
71105850719SMasahiro Yamada$(KCONFIG_CONFIG):
71205850719SMasahiro Yamada	@echo >&2 '***'
71305850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
71405850719SMasahiro Yamada	@echo >&2 '***'
71505850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
71605850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
71705850719SMasahiro Yamada	@echo >&2 '***'
71805850719SMasahiro Yamada	@/bin/false
7191da177e4SLinus Torvalds
72061277981SUlf Magnusson# The actual configuration files used during the build are stored in
72161277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
72261277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
7239390dff6SMasahiro Yamada#
7249390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
7259390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
726f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
727d952cfafSMasahiro Yamada#
728d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
729d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input.
7303044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
731d952cfafSMasahiro Yamada	$(Q)$(kecho) "  SYNC    $@"
732d952cfafSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
7332042b548SMasahiro Yamadaelse # !may-sync-config
734d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
735d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
736d7942413SMasahiro Yamada# Use auto.conf to trigger the test
7379ee4e336SSam RavnborgPHONY += include/config/auto.conf
7389ee4e336SSam Ravnborg
7399ee4e336SSam Ravnborginclude/config/auto.conf:
740264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
7415369f550SMichal Marek	echo >&2;							\
7425369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
7435369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
7445369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
7455369f550SMichal Marek	echo >&2 ;							\
7469ee4e336SSam Ravnborg	/bin/false)
7479ee4e336SSam Ravnborg
748d7942413SMasahiro Yamadaendif # may-sync-config
7492042b548SMasahiro Yamadaendif # need-config
7501da177e4SLinus Torvalds
7517d73c3e9SNick DesaulniersKBUILD_CFLAGS	+= -fno-delete-null-pointer-checks
752ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
753bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
754bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7556f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
756a1c48bb1SGeert Uytterhoeven
75715f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
758a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
75915f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
76015f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
76115f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
76215f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
7631da177e4SLinus Torvaldsendif
7641da177e4SLinus Torvalds
76569102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
7667d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
7677d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to
7687d73c3e9SNick Desaulniers# -fno-allow-store-data-races.
76969102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
770b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
7717d73c3e9SNick Desaulniersendif
77269102311SJiri Kosina
7731873e870SAndi Kleenifdef CONFIG_READABLE_ASM
7741873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
7751873e870SAndi Kleen# reorder blocks reorders the control in the function
7761873e870SAndi Kleen# ipa clone creates specialized cloned functions
7771873e870SAndi Kleen# partial inlining inlines only parts of functions
7787d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
7791873e870SAndi Kleenendif
7801873e870SAndi Kleen
78108f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
782a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
78335bb5b1eSAndi Kleenendif
78435bb5b1eSAndi Kleen
785893ab004SMasahiro Yamadastackp-flags-y                                    := -fno-stack-protector
786050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
787050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
7882a61f474SMasahiro Yamada
7892a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
790e06b8b98SSam Ravnborg
7913fe617ccSLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
7923fe617ccSLinus TorvaldsKBUILD_CFLAGS += $(KBUILD_CFLAGS-y)
7933fe617ccSLinus Torvalds
794076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
795a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
7965c6ae0efSNathan Chancellor# The kernel builds with '-std=gnu89' so use of GNU extensions is acceptable.
797a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
798cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
799cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
800cfe17c9bSMasahiro Yamada# See modpost pattern 2
801a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
802d936eb23SLinus Torvaldselse
803d936eb23SLinus Torvalds
804d936eb23SLinus Torvalds# Warn about unmarked fall-throughs in switch statement.
805d936eb23SLinus Torvalds# Disabled for clang while comment to attribute conversion happens and
806d936eb23SLinus Torvalds# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
807d936eb23SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=5,)
80849832c81SRandy Dunlap# gcc inanely warns about local variables called 'main'
80949832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main
810cfe17c9bSMasahiro Yamadaendif
811cfe17c9bSMasahiro Yamada
812885480b0SNathan Chancellor# These warnings generated too much noise in a regular build.
813885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
814885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
8150a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
8166272cc38SNathan Chancellor
8171da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
818a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
8191da177e4SLinus Torvaldselse
8207e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
8217e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
8227e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
8237e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
8247e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
8257e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
826a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
8271da177e4SLinus Torvaldsendif
8287e9501fdSRabin Vincentendif
8291da177e4SLinus Torvalds
830f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern.
831f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN
832709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
833709a972eSKees Cookendif
834709a972eSKees Cook
835f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value.
836f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO
837f0fe00d4Sglider@google.com# Future support for zero initialization is still being debated, see
838f0fe00d4Sglider@google.com# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
839f0fe00d4Sglider@google.com# renamed or dropped.
840f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
841f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
842f0fe00d4Sglider@google.comendif
843f0fe00d4Sglider@google.com
84439218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes
84539218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers.
84639218ff4SKees CookKBUILD_CFLAGS	+= $(call cc-option, -fno-stack-clash-protection)
84739218ff4SKees Cook
848a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
849a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS
850a82adfd5SKees CookKBUILD_CFLAGS	+= -fzero-call-used-regs=used-gpr
851a82adfd5SKees Cookendif
852a82adfd5SKees Cook
853315da87cSMasahiro YamadaDEBUG_CFLAGS	:=
854315da87cSMasahiro Yamada
8551da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
856695afd3dSSedat Dilek
857866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
8589d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
859866ced95SAndi Kleenelse
8601e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
861866ced95SAndi Kleenendif
862695afd3dSSedat Dilek
86352cc02b9SMasahiro Yamadaifndef CONFIG_AS_IS_LLVM
8642288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
865b8a90923SNick Desaulniersendif
866695afd3dSSedat Dilek
867a66049e2SNick Desaulniersifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
868a66049e2SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
86998cd6f52SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
870a66049e2SNick DesaulniersDEBUG_CFLAGS	+= -gdwarf-$(dwarf-version-y)
871bfaf2dd3SAndi Kleenendif
8721da177e4SLinus Torvalds
873d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
8747d73c3e9SNick DesaulniersDEBUG_CFLAGS	+= -fno-var-tracking
8757d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
8767d73c3e9SNick DesaulniersDEBUG_CFLAGS	+= -femit-struct-debug-baseonly
8777d73c3e9SNick Desaulniersendif
878d6f4ceb7SAndi Kleenendif
879d6f4ceb7SAndi Kleen
88010e68b02SNick Desaulniersifdef CONFIG_DEBUG_INFO_COMPRESSED
88110e68b02SNick DesaulniersDEBUG_CFLAGS	+= -gz=zlib
8827b169944SArvind SankarKBUILD_AFLAGS	+= -gz=zlib
88310e68b02SNick DesaulniersKBUILD_LDFLAGS	+= --compress-debug-sections=zlib
88410e68b02SNick Desaulniersendif
88510e68b02SNick Desaulniers
886695afd3dSSedat Dilekendif # CONFIG_DEBUG_INFO
887695afd3dSSedat Dilek
8881e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
8891e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
8901e88e415SMasahiro Yamada
891606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
8923b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC
89307d04081SVasily Gorbik  CC_FLAGS_FTRACE	+= -mrecord-mcount
8942f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8952f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8962f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8972f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8982f4df001SVasily Gorbik    endif
8992f4df001SVasily Gorbik  endif
90007d04081SVasily Gorbikendif
90122c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
90222c8542dSSami Tolvanen  CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
90322c8542dSSami Tolvanenendif
9043b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
9053b15cdc1SSami Tolvanen  ifdef CONFIG_HAVE_C_RECORDMCOUNT
9063b15cdc1SSami Tolvanen    BUILD_C_RECORDMCOUNT := y
9073b15cdc1SSami Tolvanen    export BUILD_C_RECORDMCOUNT
9083b15cdc1SSami Tolvanen  endif
9093b15cdc1SSami Tolvanenendif
910a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
9117d73c3e9SNick Desaulniers  # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
912f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
913f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
914f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
915a2546faeSSteven Rostedt  endif
916f28bc3c3SVasily Gorbikendif
917f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
918f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
919f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
92016444a8aSArnaldo Carvalho de Meloendif
92116444a8aSArnaldo Carvalho de Melo
92291341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
92391341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
9247d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-inline-functions-called-once
92591341d4bSSam Ravnborgendif
92691341d4bSSam Ravnborg
92790ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
928e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
929e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
93090ad4052SMasahiro Yamadaendif
93190ad4052SMasahiro Yamada
932d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK
933d08b9f0cSSami TolvanenCC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
934d08b9f0cSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
935d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS
936d08b9f0cSSami Tolvanenendif
937d08b9f0cSSami Tolvanen
938dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG
939dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN
9402b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto=thin -fsplit-lto-unit
9417f69180bSMasahiro YamadaKBUILD_LDFLAGS	+= --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
942dc5723b0SSami Tolvanenelse
9432b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto
944dc5723b0SSami Tolvanenendif
945dc5723b0SSami TolvanenCC_FLAGS_LTO	+= -fvisibility=hidden
94622d429e7SSami Tolvanen
94722d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size
94822d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5
94924845dcbSNick Desaulniers
9500236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion
9510236526dSTor Vic# when using lld < 13.0.0.
95224845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0)
9530236526dSTor Vicifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
95424845dcbSNick DesaulniersKBUILD_LDFLAGS	+= -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
95524845dcbSNick Desaulniersendif
956dc5723b0SSami Tolvanenendif
9570236526dSTor Vicendif
958dc5723b0SSami Tolvanen
959dc5723b0SSami Tolvanenifdef CONFIG_LTO
9605e95325fSSami TolvanenKBUILD_CFLAGS	+= -fno-lto $(CC_FLAGS_LTO)
9615e95325fSSami TolvanenKBUILD_AFLAGS	+= -fno-lto
962dc5723b0SSami Tolvanenexport CC_FLAGS_LTO
963dc5723b0SSami Tolvanenendif
964dc5723b0SSami Tolvanen
965cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG
966cf68fffbSSami TolvanenCC_FLAGS_CFI	:= -fsanitize=cfi \
967cf68fffbSSami Tolvanen		   -fsanitize-cfi-cross-dso \
968cf68fffbSSami Tolvanen		   -fno-sanitize-cfi-canonical-jump-tables \
969cf68fffbSSami Tolvanen		   -fno-sanitize-trap=cfi \
970cf68fffbSSami Tolvanen		   -fno-sanitize-blacklist
971cf68fffbSSami Tolvanen
972cf68fffbSSami Tolvanenifdef CONFIG_CFI_PERMISSIVE
973cf68fffbSSami TolvanenCC_FLAGS_CFI	+= -fsanitize-recover=cfi
974cf68fffbSSami Tolvanenendif
975cf68fffbSSami Tolvanen
976cf68fffbSSami Tolvanen# If LTO flags are filtered out, we must also filter out CFI.
977cf68fffbSSami TolvanenCC_FLAGS_LTO	+= $(CC_FLAGS_CFI)
978cf68fffbSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_CFI)
979cf68fffbSSami Tolvanenexport CC_FLAGS_CFI
980cf68fffbSSami Tolvanenendif
981cf68fffbSSami Tolvanen
982cf536e18SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B
983cf536e18SFeng TangKBUILD_CFLAGS += -falign-functions=64
98409c60546SFeng Tangendif
98509c60546SFeng Tang
986e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
987e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
988e8e69931SSam Ravnborg
9891da177e4SLinus Torvalds# warn about C99 declaration after statement
990a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
9911da177e4SLinus Torvalds
9920bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
9938289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
9940bb95f80SKees Cook
995070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
996fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
9971da177e4SLinus Torvalds
998217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
999217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
1000217c3e01SStephen Rothwell
10015c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
10025c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
10037d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-array-bounds
10045a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
10055c45de21SLinus Torvalds
1006adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
1007adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
1008adc71920SLinus Torvalds
100978a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
10107d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
10117d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized
10127d73c3e9SNick Desaulniersendif
101378a5255fSLinus Torvalds
1014fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
10158b42cf2fSMasahiro YamadaKBUILD_CFLAGS	+= -fno-strict-overflow
1016d0115552SLinus Torvalds
10173ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
10187d4eb0d8SMasahiro YamadaKBUILD_CFLAGS  += -fno-stack-check
10193ce120b1SLinus Torvalds
10208f7f5c9fSAndi Kleen# conserve stack if available
10217d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
10227d73c3e9SNick DesaulniersKBUILD_CFLAGS   += -fconserve-stack
10237d73c3e9SNick Desaulniersendif
10248f7f5c9fSAndi Kleen
1025fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
102687de84c9SMasahiro YamadaKBUILD_CFLAGS   += -Werror=date-time
1027fe7c36c7SJosh Triplett
1028ea8daa7bSDaniel Wagner# enforce correct pointer usage
1029ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
1030ea8daa7bSDaniel Wagner
1031c834f0e8SKees Cook# Require designated initializers for all marked structures
1032c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
1033c834f0e8SKees Cook
1034a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
1035a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1036a73619a8SMasahiro Yamada
1037e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed
1038e0fe0bbeSMasahiro Yamadainclude-y			:= scripts/Makefile.extrawarn
1039e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
1040e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
1041e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN)		+= scripts/Makefile.ubsan
1042e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV)		+= scripts/Makefile.kcov
1043e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS)	+= scripts/Makefile.gcc-plugins
1044e0fe0bbeSMasahiro Yamada
1045e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y))
1046a86fe353SMasahiro Yamada
1047132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last.
1048132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel
1049132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point.
1050bf5438fcSJason Baron
10518cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
10528cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
10538cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
10548cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
105552bcc330SSam Ravnborg
1056a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1
1057a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1
105818991197SRoland McGrath
10595d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1060d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
10615d7d18f5SDavid Howellsendif
10625d7d18f5SDavid Howells
10635cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
106427f2a4dbSNick DesaulniersLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr --use-android-relr-tags
10655cf896fbSPeter Collingbourneendif
10665cf896fbSPeter Collingbourne
106759612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the
106859612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script.
106959612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN
107059612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn
107159612b24SNathan Chancellorendif
107259612b24SNathan Chancellor
10737f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
10747f58b487SMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10757f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10767f3a59dbSMasahiro Yamada
107780591e61SLuc Van Oostenryck# make the checker run with the right architecture
107880591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
107980591e61SLuc Van Oostenryck
108014516765SLuc Van Oostenryck# insure the checker run with the right endianness
108114516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
108214516765SLuc Van Oostenryck
10831f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
10841f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
10851f2f01b1SLuc Van Oostenryck
10861da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
10871da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
10881da177e4SLinus Torvalds# set in the environment
10891da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
10901da177e4SLinus Torvalds# this default value
10911da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
10921da177e4SLinus Torvalds
10931da177e4SLinus Torvalds#
10941da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
10951da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
10961da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
10971da177e4SLinus Torvalds
10981da177e4SLinus Torvalds#
1099f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1100f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1101f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
1102f4d4ffc0SJason Cooper#
1103f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1104f4d4ffc0SJason Cooper
1105f4d4ffc0SJason Cooper#
11061da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
11071da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
1108070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
11091da177e4SLinus Torvalds#
11101da177e4SLinus Torvalds
1111df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
11121da177e4SLinus Torvaldsexport MODLIB
11131da177e4SLinus Torvalds
1114e00d8880SMasahiro YamadaPHONY += prepare0
1115e2a666d5SRusty Russell
1116ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
11177f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order
11187f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
111947801c97SMasahiro Yamada
11201da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1121cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
11221da177e4SLinus Torvalds
112323febe37SMasahiro Yamadavmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
11241da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
112595fb6317SMasahiro Yamada		     $(libs-y) $(libs-m)))
11261da177e4SLinus Torvalds
11271eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
112823febe37SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(core-) \
112995fb6317SMasahiro Yamada			$(drivers-) $(libs-))))
11301da177e4SLinus Torvalds
1131b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \
1132b2c88554SMasahiro Yamada			$(core-y) $(core-m) $(libs-y) $(libs-m) \
1133b2c88554SMasahiro Yamada			$(drivers-y) $(drivers-m)))
11341da177e4SLinus Torvalds
1135c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
113676cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1137c99f3918SMasahiro Yamada
11381f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1139f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1140f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1141f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES
1142f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1143f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1144f0d50ca0SMasahiro Yamadaelse
1145f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1146f0d50ca0SMasahiro Yamadaendif
1147f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1148f0d50ca0SMasahiro Yamada
1149f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
115095698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
115185f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1152233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
11531da177e4SLinus Torvalds
1154d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
11551da177e4SLinus Torvalds
11563fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
11573fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
11582441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
11591f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
11601f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
11611f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
11621f50b80aSMasahiro YamadaKBUILD_MODULES := 1
1163fb2d99beSMasahiro Yamada
1164fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order
1165fb2d99beSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1166fb2d99beSMasahiro Yamada	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
11671f50b80aSMasahiro Yamadaendif
11681f50b80aSMasahiro Yamada
116907a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
117007a422bbSMasahiro Yamada
117188694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
117288694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
117388694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
117488694cffSQuentin Perret
117507a422bbSMasahiro Yamada$(autoksyms_h):
117688694cffSQuentin Perret	$(call cmd,autoksyms_h)
117723121ca2SNicolas Pitre
1178fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1179fbe6e37dSNicholas Piggin
1180fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1181fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
11823ec8a5b3SMasahiro Yamada	$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";    \
1183fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
11842441e78bSNicolas Pitre
11853fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
11860b956e20SRasmus Villemoes	+$(call if_changed_dep,link-vmlinux)
1187741f98feSSam Ravnborg
1188392885eeSMasahiro Yamadatargets := vmlinux
1189392885eeSMasahiro Yamada
11901da177e4SLinus Torvalds# The actual objects are generated when descending,
11911da177e4SLinus Torvalds# make sure no implicit rule kicks in
1192b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
11931da177e4SLinus Torvalds
1194ba97df45SMasahiro Yamadafilechk_kernel.release = \
11950d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
11960d0e7718SMichal Marek
119783a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
119824512795SMasahiro Yamadainclude/config/kernel.release: FORCE
11990d0e7718SMichal Marek	$(call filechk,kernel.release)
1200cb58455cSSam Ravnborg
1201d8821622SMasahiro Yamada# Additional helpers built in scripts/
1202d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1203d8821622SMasahiro Yamada# in parallel
1204d8821622SMasahiro YamadaPHONY += scripts
120560df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1206d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1207cb58455cSSam Ravnborg
12081da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
12095bb78269SSam Ravnborg# or the modules are listed in "prepare".
12105bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
12115bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
12125bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
12131da177e4SLinus Torvalds
1214a5139fb3SMasahiro YamadaPHONY += prepare archprepare
12155bb78269SSam Ravnborg
121636de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
12173044dd05SMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
12181476fee5SMasahiro Yamada	include/generated/autoconf.h remove-stale-files
12195bb78269SSam Ravnborg
122065bba042SMasahiro Yamadaprepare0: archprepare
122160df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
12228d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
122386feeaa8SSam Ravnborg
12241da177e4SLinus Torvalds# All the preparing..
12250d989ac2SMasahiro Yamadaprepare: prepare0
1226b9ab5ebbSJosh Poimboeuf
12271476fee5SMasahiro YamadaPHONY += remove-stale-files
12281476fee5SMasahiro Yamadaremove-stale-files:
12291476fee5SMasahiro Yamada	$(Q)$(srctree)/scripts/remove-stale-files
12301476fee5SMasahiro Yamada
12312c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
12327d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
12337d0e5c20SMasahiro Yamada
12342c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
12352c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1236037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1237037fc336SMasahiro Yamada	generic=include/asm-generic
12382c1f4f12SMasahiro Yamadauapi-asm-generic:
1239037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1240037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
12412c1f4f12SMasahiro Yamada
12421da177e4SLinus Torvalds# Generate some files
12431da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12441da177e4SLinus Torvalds
12451da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
12461da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
12471da177e4SLinus Torvalds
12481da177e4SLinus Torvaldsuts_len := 64
124963104eecSSam Ravnborgdefine filechk_utsrelease.h
12501da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
12511da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
12521da177e4SLinus Torvalds	  exit 1;                                                         \
12531da177e4SLinus Torvalds	fi;                                                               \
1254ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
12551da177e4SLinus Torvaldsendef
12561da177e4SLinus Torvalds
125763104eecSSam Ravnborgdefine filechk_version.h
12589b82f13eSSasha Levin	if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1259ad774086SMasahiro Yamada		echo \#define LINUX_VERSION_CODE $(shell                 \
1260207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
12619b82f13eSSasha Levin	else                                                             \
12629b82f13eSSasha Levin		echo \#define LINUX_VERSION_CODE $(shell                 \
1263207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
12649b82f13eSSasha Levin	fi;                                                              \
12659b82f13eSSasha Levin	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
126688a68672SSasha Levin	((c) > 255 ? 255 : (c)))';                                       \
126788a68672SSasha Levin	echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
126888a68672SSasha Levin	echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
126988a68672SSasha Levin	echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
127063104eecSSam Ravnborgendef
127163104eecSSam Ravnborg
1272207da4c8SMasahiro Yamada$(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1273207da4c8SMasahiro Yamada$(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
127443fee2b2SMasahiro Yamada$(version_h): FORCE
12751da177e4SLinus Torvalds	$(call filechk,version.h)
12761da177e4SLinus Torvalds
1277273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
127863104eecSSam Ravnborg	$(call filechk,utsrelease.h)
127963104eecSSam Ravnborg
1280179efcb4SVegard NossumPHONY += headerdep
1281179efcb4SVegard Nossumheaderdep:
12829663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
12839663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1284179efcb4SVegard Nossum
12851da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12868d730cfbSDavid Woodhouse# Kernel headers
12878d730cfbSDavid Woodhouse
1288e6883b18SSam Ravnborg#Default location for installed headers
1289e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1290e6883b18SSam Ravnborg
129159b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
129259b2bd05SMasahiro Yamada      cmd_headers_install = \
129359b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
129459b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
129559b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
12966d716275SDavid Woodhouse
12978d730cfbSDavid WoodhousePHONY += headers_install
129859b2bd05SMasahiro Yamadaheaders_install: headers
129959b2bd05SMasahiro Yamada	$(call cmd,headers_install)
13004f193362SPaul Smith
13011da177e4SLinus TorvaldsPHONY += archheaders archscripts
13021da177e4SLinus Torvalds
1303a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
13041da177e4SLinus Torvalds
130559b2bd05SMasahiro YamadaPHONY += headers
130659b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
13079d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
13082fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1309d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1310d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
13111f85712eSMike Frysinger
13127ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
131368475359SDavid WoodhousePHONY += headers_check
13147ecaf069SMasahiro Yamadaheaders_check:
1315609bbb4dSMasahiro Yamada	@echo >&2 "=================== WARNING ==================="
1316609bbb4dSMasahiro Yamada	@echo >&2 "Since Linux 5.5, 'make headers_check' is no-op,"
1317609bbb4dSMasahiro Yamada	@echo >&2 "and will be removed after Linux 5.15 release."
1318609bbb4dSMasahiro Yamada	@echo >&2 "Please remove headers_check from your scripts."
1319609bbb4dSMasahiro Yamada	@echo >&2 "==============================================="
132068475359SDavid Woodhouse
1321e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
132259b2bd05SMasahiro Yamadaprepare: headers
1323e949f4c2SMasahiro Yamadaendif
13241da177e4SLinus Torvalds
1325bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1326bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1327bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1328bdd7714bSMasahiro Yamada
13291da177e4SLinus Torvalds# ---------------------------------------------------------------------------
133014ccc638SMasahiro Yamada# Install
133114ccc638SMasahiro Yamada
133214ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel.
133314ccc638SMasahiro Yamada# If DKMS is installed, 'make install' will eventually recuses back
133414ccc638SMasahiro Yamada# to the this Makefile to build and install external modules.
133514ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
133614ccc638SMasahiro Yamada
133714ccc638SMasahiro Yamadainstall: sub_make_done :=
133814ccc638SMasahiro Yamada
133914ccc638SMasahiro Yamada# ---------------------------------------------------------------------------
13401bb0b18aSMasahiro Yamada# Tools
13411bb0b18aSMasahiro Yamada
13420d989ac2SMasahiro Yamadaifdef CONFIG_STACK_VALIDATION
13430d989ac2SMasahiro Yamadaprepare: tools/objtool
13440d989ac2SMasahiro Yamadaendif
13450d989ac2SMasahiro Yamada
13460d989ac2SMasahiro Yamadaifdef CONFIG_BPF
13470d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF
13480d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids
13490d989ac2SMasahiro Yamadaendif
13500d989ac2SMasahiro Yamadaendif
13510d989ac2SMasahiro Yamada
13520d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean
13530d989ac2SMasahiro Yamada
13540d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
13550d989ac2SMasahiro Yamada
13560d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist
13570d989ac2SMasahiro Yamada# in output directory, skip its clean in that case
13580d989ac2SMasahiro Yamadaresolve_btfids_clean:
13590d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),)
13600d989ac2SMasahiro Yamada	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
13610d989ac2SMasahiro Yamadaendif
13620d989ac2SMasahiro Yamada
13631bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake
13641bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_)
13651bb0b18aSMasahiro Yamadatools_silent=s
13661bb0b18aSMasahiro Yamadaendif
13671bb0b18aSMasahiro Yamada
13681bb0b18aSMasahiro Yamadatools/: FORCE
13691bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
13701bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
13711bb0b18aSMasahiro Yamada
13721bb0b18aSMasahiro Yamadatools/%: FORCE
13731bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
13741bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
13751bb0b18aSMasahiro Yamada
13761bb0b18aSMasahiro Yamada# ---------------------------------------------------------------------------
13775a5da78bSShuah Khan# Kernel selftest
13785a5da78bSShuah Khan
13795a5da78bSShuah KhanPHONY += kselftest
13805a5da78bSShuah Khankselftest:
13812bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
13825a5da78bSShuah Khan
138317eac6c2SShuah Khankselftest-%: FORCE
138417eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1385dcb825a9SWang Long
13863d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
13873d6dee7aSBamvor Jian Zhangkselftest-merge:
13883d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
13896d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
13906d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
13913e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
13923d6dee7aSBamvor Jian Zhang
13935a5da78bSShuah Khan# ---------------------------------------------------------------------------
139437c8a5faSRob Herring# Devicetree files
139537c8a5faSRob Herring
139637c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
139737c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
139837c8a5faSRob Herringendif
139937c8a5faSRob Herring
140037c8a5faSRob Herringifneq ($(dtstree),)
140137c8a5faSRob Herring
1402a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
140337c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
140437c8a5faSRob Herring
1405ce88c9c7SViresh Kumar%.dtbo: include/config/kernel.release scripts_dtc
1406ce88c9c7SViresh Kumar	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1407ce88c9c7SViresh Kumar
1408c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1409b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
141037c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
141137c8a5faSRob Herring
1412b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1413e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1414b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1415b5154bf6SMasahiro Yamadaendif
1416b5154bf6SMasahiro Yamada
1417b5154bf6SMasahiro Yamadadtbs_check: dtbs
14184f0e3a57SRob Herring
141937c8a5faSRob Herringdtbs_install:
14202431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
142137c8a5faSRob Herring
142237c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
142337c8a5faSRob Herringall: dtbs
142437c8a5faSRob Herringendif
142537c8a5faSRob Herring
142637c8a5faSRob Herringendif
142737c8a5faSRob Herring
142837c8a5faSRob HerringPHONY += scripts_dtc
142937c8a5faSRob Herringscripts_dtc: scripts_basic
143037c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
143137c8a5faSRob Herring
1432e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1433e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1434e10c4321SMasahiro Yamadaendif
1435e10c4321SMasahiro Yamada
1436c473a8d0SMasahiro YamadaPHONY += dt_binding_check
14374f0e3a57SRob Herringdt_binding_check: scripts_dtc
14384f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
14394f0e3a57SRob Herring
144037c8a5faSRob Herring# ---------------------------------------------------------------------------
14411da177e4SLinus Torvalds# Modules
14421da177e4SLinus Torvalds
14431da177e4SLinus Torvaldsifdef CONFIG_MODULES
14441da177e4SLinus Torvalds
14451da177e4SLinus Torvalds# By default, build modules as well
14461da177e4SLinus Torvalds
144773d1393eSMichal Marekall: modules
14481da177e4SLinus Torvalds
14494b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider
14504b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to
14514b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them.
14524b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS
14534b50c8c4SMasahiro Yamada  KBUILD_BUILTIN := 1
14544b50c8c4SMasahiro Yamadaendif
14554b50c8c4SMasahiro Yamada
14561da177e4SLinus Torvalds# Build modules
1457551559e1STejun Heo#
1458551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1459551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1460551559e1STejun Heo# using awk while concatenating to the final file.
14611da177e4SLinus Torvalds
14624f193362SPaul SmithPHONY += modules
1463596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
14641da177e4SLinus Torvalds
1465b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1466b2c88554SMasahiro Yamada
1467b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE
1468b2c88554SMasahiro Yamada	$(call if_changed,modules_order)
1469b2c88554SMasahiro Yamada
1470b2c88554SMasahiro Yamadatargets += modules.order
1471a6c36632SMichal Marek
14721da177e4SLinus Torvalds# Target to prepare building external modules
14734f193362SPaul SmithPHONY += modules_prepare
1474059bc9fcSMasahiro Yamadamodules_prepare: prepare
1475596b0474SMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
14761da177e4SLinus Torvalds
1477961ab4a3SMasahiro Yamadaexport modules_sign_only :=
14781da177e4SLinus Torvalds
1479961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y)
1480961ab4a3SMasahiro YamadaPHONY += modules_sign
1481961ab4a3SMasahiro Yamadamodules_sign: modules_install
1482961ab4a3SMasahiro Yamada	@:
1483961ab4a3SMasahiro Yamada
1484961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install.
1485961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1486961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),)
1487961ab4a3SMasahiro Yamadamodules_sign_only := y
1488961ab4a3SMasahiro Yamadaendif
1489961ab4a3SMasahiro Yamadaendif
1490961ab4a3SMasahiro Yamada
1491961ab4a3SMasahiro Yamadamodinst_pre :=
1492961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),)
1493961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre
1494961ab4a3SMasahiro Yamadaendif
1495961ab4a3SMasahiro Yamada
1496961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre)
14973e3005dfSMasahiro YamadaPHONY += __modinst_pre
14983e3005dfSMasahiro Yamada__modinst_pre:
14991da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
15001da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
15011da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
15028e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
15031da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
15041da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
15057e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
15061da177e4SLinus Torvalds	fi
15071bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
15082c6d9636SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
15092c6d9636SMasahiro Yamada	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
15101da177e4SLinus Torvalds
15111da177e4SLinus Torvaldsendif # CONFIG_MODULES
15121da177e4SLinus Torvalds
15131da177e4SLinus Torvalds###
15141da177e4SLinus Torvalds# Cleaning is done on three levels.
15151da177e4SLinus Torvalds# make clean     Delete most generated files
15161da177e4SLinus Torvalds#                Leave enough to build external modules
15171da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
15181da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
15191da177e4SLinus Torvalds
15201da177e4SLinus Torvalds# Directories & files removed with 'make clean'
152169bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
15223d32285fSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps \
15234c7858b9SMasahiro Yamada	       compile_commands.json .thinlto-cache
15241da177e4SLinus Torvalds
15251da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
15260663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
152746a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
15280663c68cSMasahiro Yamada		  debian snap tar-install \
15290663c68cSMasahiro Yamada		  .config .config.old .version \
153046457133SMasahiro Yamada		  Module.symvers \
1531b31f2a49SNayna Jain		  certs/signing_key.pem certs/signing_key.x509 \
1532b31f2a49SNayna Jain		  certs/x509.genkey \
1533b31f2a49SNayna Jain		  vmlinux-gdb.py \
153446a63d4bSMasahiro Yamada		  *.spec
15351da177e4SLinus Torvalds
15361da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
15371da177e4SLinus Torvalds#
15381da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
15391da177e4SLinus Torvalds
154076cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
15411da177e4SLinus Torvalds
1542bd1ee804SPawel Mollvmlinuxclean:
1543bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1544fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1545bd1ee804SPawel Moll
154650d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean
15471da177e4SLinus Torvalds
15481da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
15491da177e4SLinus Torvalds#
15501da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1551cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
15521da177e4SLinus Torvalds
1553b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
15541da177e4SLinus Torvalds$(mrproper-dirs):
15551da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
15561da177e4SLinus Torvalds
1557b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
15581da177e4SLinus Torvalds	$(call cmd,rmfiles)
15591da177e4SLinus Torvalds
15601da177e4SLinus Torvalds# distclean
15611da177e4SLinus Torvalds#
15624f193362SPaul SmithPHONY += distclean
15631da177e4SLinus Torvalds
15641da177e4SLinus Torvaldsdistclean: mrproper
156519c8d912SMasahiro Yamada	@find . $(RCS_FIND_IGNORE) \
15661da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1567f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
15687a02cec5SMasahiro Yamada		-o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
15697a02cec5SMasahiro Yamada		-o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
15701da177e4SLinus Torvalds		-type f -print | xargs rm -f
15711da177e4SLinus Torvalds
15721da177e4SLinus Torvalds
15731da177e4SLinus Torvalds# Packaging of the kernel to various formats
15741da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15751da177e4SLinus Torvalds
1576bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1577000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1578031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1579000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
15801da177e4SLinus Torvalds
15811da177e4SLinus Torvalds# Brief documentation of the typical targets used
15821da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15831da177e4SLinus Torvalds
15845dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1585a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
15865dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
15875dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
15881da177e4SLinus Torvalds
1589fe69b420SMasahiro YamadaPHONY += help
15901da177e4SLinus Torvaldshelp:
15911da177e4SLinus Torvalds	@echo  'Cleaning targets:'
15925ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
15935cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
15945ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
15955cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
15961da177e4SLinus Torvalds	@echo  ''
15971da177e4SLinus Torvalds	@echo  'Configuration targets:'
15981da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
15991da177e4SLinus Torvalds	@echo  ''
16001da177e4SLinus Torvalds	@echo  'Other generic targets:'
16011da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
16021da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
16031da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
16049cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
16051da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
160640ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1607433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1608433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
160962718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
161062718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1611155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1612c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
16131da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
16141da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1615f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
16163f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
16173f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
16183f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
16192fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
162059df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
16212fb9b1bdSSam Ravnborg	 echo  ''
162231b8cc80SRandy Dunlap	@echo  'Static analysers:'
16231da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1624aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1625ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1626295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
162774425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
16287f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
16296ad7cbc0SNathan Huckleberry	@echo  '  clang-analyzer  - Check with clang static analyzer'
16306ad7cbc0SNathan Huckleberry	@echo  '  clang-tidy      - Check with clang-tidy'
163174425eeeSNicolas Palix	@echo  ''
1632eb8305aeSMatthias Maennich	@echo  'Tools:'
1633eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1634eb8305aeSMatthias Maennich	@echo  ''
163531b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1636e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
16375a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
16385a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1639e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1640e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1641e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1642dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1643e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1644e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
16455a5da78bSShuah Khan	@echo  ''
164637c8a5faSRob Herring	@$(if $(dtstree), \
164737c8a5faSRob Herring		echo 'Devicetree:'; \
164837c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
164937c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
16507aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
16517aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
165237c8a5faSRob Herring		echo '')
165337c8a5faSRob Herring
165431b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
165531b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
165631b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
165731b8cc80SRandy Dunlap	@echo  ''
16581da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1659000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
16601da177e4SLinus Torvalds	@echo  ''
16611da177e4SLinus Torvalds	@echo  'Documentation targets:'
1662cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
16631da177e4SLinus Torvalds	@echo  ''
166401dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
16651da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
166601dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
16671da177e4SLinus Torvalds	@echo  ''
16681da177e4SLinus Torvalds	@$(if $(boards), \
16691da177e4SLinus Torvalds		$(foreach b, $(boards), \
16704234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
16711da177e4SLinus Torvalds		echo '')
16725dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
16735dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
16745dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
16755dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
16765dffbe81SSegher Boessenkool		echo '')
16771da177e4SLinus Torvalds
16781da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
167945d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
16801da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1681a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1682a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1683701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1684af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1685e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
168628bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
168728bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
168828bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1689a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
16901da177e4SLinus Torvalds	@echo  ''
16911da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
16921da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
16931da177e4SLinus Torvalds
16941da177e4SLinus Torvalds
16955dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
16965dffbe81SSegher Boessenkool
16975dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
16985dffbe81SSegher Boessenkool
1699fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
17005dffbe81SSegher Boessenkool
17015dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
17025dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
17035dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
17045dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
17055dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
17065dffbe81SSegher Boessenkool		echo '')
17075dffbe81SSegher Boessenkool
17085dffbe81SSegher Boessenkool
17091da177e4SLinus Torvalds# Documentation targets
17101da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1711e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1712e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
171322cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1714bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1715cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
17161da177e4SLinus Torvalds
171767274c08SMasahiro Yamada# Misc
171867274c08SMasahiro Yamada# ---------------------------------------------------------------------------
171967274c08SMasahiro Yamada
172067274c08SMasahiro YamadaPHONY += scripts_gdb
17217a739ce5SMasahiro Yamadascripts_gdb: prepare0
17221e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
17238d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
172467274c08SMasahiro Yamada
172567274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
172667274c08SMasahiro Yamadaall: scripts_gdb
172767274c08SMasahiro Yamadaendif
172867274c08SMasahiro Yamada
17291da177e4SLinus Torvaldselse # KBUILD_EXTMOD
17301da177e4SLinus Torvalds
17311da177e4SLinus Torvalds###
17321da177e4SLinus Torvalds# External module support.
17331da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
17341da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
17351da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
173611122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used.
17371da177e4SLinus Torvalds
17386212804fSMasahiro Yamada# We are always building only modules.
17396212804fSMasahiro YamadaKBUILD_BUILTIN :=
17401da177e4SLinus TorvaldsKBUILD_MODULES := 1
17411da177e4SLinus Torvalds
1742c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
17433d32285fSMasahiro Yamada$(MODORDER): descend
17443d32285fSMasahiro Yamada	@:
17453d32285fSMasahiro Yamada
17467f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json
17473d32285fSMasahiro YamadaPHONY += compile_commands.json
17483d32285fSMasahiro Yamada
174976cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
17503d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1751dc5723b0SSami Tolvanen	$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
17521da177e4SLinus Torvalds
17536072b2c4SMasahiro YamadaPHONY += prepare
17546072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations
17556072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
17566072b2c4SMasahiro Yamadaprepare:
17576072b2c4SMasahiro Yamada	@if [ "$(CC_VERSION_TEXT)" != $(CONFIG_CC_VERSION_TEXT) ]; then \
17586072b2c4SMasahiro Yamada		echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
17596072b2c4SMasahiro Yamada		echo >&2 "  The kernel was built by: "$(CONFIG_CC_VERSION_TEXT); \
17606072b2c4SMasahiro Yamada		echo >&2 "  You are using:           $(CC_VERSION_TEXT)"; \
17616072b2c4SMasahiro Yamada	fi
17626072b2c4SMasahiro Yamada
1763fe69b420SMasahiro YamadaPHONY += help
17641da177e4SLinus Torvaldshelp:
17651da177e4SLinus Torvalds	@echo  '  Building external modules.'
17661da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
17671da177e4SLinus Torvalds	@echo  ''
17681da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
17691da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
17701da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
17711da177e4SLinus Torvalds	@echo  ''
177206300b21SSam Ravnborg
1773596b0474SMasahiro Yamada# no-op for external module builds
17746072b2c4SMasahiro YamadaPHONY += modules_prepare
1775596b0474SMasahiro Yamada
17761da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
17771da177e4SLinus Torvalds
17783e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
17793e3005dfSMasahiro Yamada# Modules
17803e3005dfSMasahiro Yamada
17813e3005dfSMasahiro YamadaPHONY += modules modules_install
17823e3005dfSMasahiro Yamada
17833e3005dfSMasahiro Yamadaifdef CONFIG_MODULES
17843e3005dfSMasahiro Yamada
17851a998be6SMasahiro Yamadamodules: modules_check
17863e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
17873e3005dfSMasahiro Yamada
17881a998be6SMasahiro YamadaPHONY += modules_check
17891a998be6SMasahiro Yamadamodules_check: $(MODORDER)
17901a998be6SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
17911a998be6SMasahiro Yamada
17923ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD  $(MODLIB)
17933e3005dfSMasahiro Yamada      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
17943e3005dfSMasahiro Yamada                   $(KERNELRELEASE)
17953e3005dfSMasahiro Yamada
17963e3005dfSMasahiro Yamadamodules_install:
17973e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
17983e3005dfSMasahiro Yamada	$(call cmd,depmod)
17993e3005dfSMasahiro Yamada
18003e3005dfSMasahiro Yamadaelse # CONFIG_MODULES
18013e3005dfSMasahiro Yamada
18023e3005dfSMasahiro Yamada# Modules not configured
18033e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
18043e3005dfSMasahiro Yamada
18053e3005dfSMasahiro Yamadamodules modules_install:
18063e3005dfSMasahiro Yamada	@echo >&2 '***'
18073e3005dfSMasahiro Yamada	@echo >&2 '*** The present kernel configuration has modules disabled.'
18083e3005dfSMasahiro Yamada	@echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
18093e3005dfSMasahiro Yamada	@echo >&2 '*** to enable CONFIG_MODULES.'
18103e3005dfSMasahiro Yamada	@echo >&2 '***'
18113e3005dfSMasahiro Yamada	@exit 1
18123e3005dfSMasahiro Yamada
18133e3005dfSMasahiro Yamadaendif # CONFIG_MODULES
18143e3005dfSMasahiro Yamada
1815b1fbfcb4SMasahiro Yamada# Single targets
1816b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1817b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1818b1fbfcb4SMasahiro Yamada#
1819b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1820b1fbfcb4SMasahiro Yamada#
1821b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1822b1fbfcb4SMasahiro Yamada#
1823b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1824b1fbfcb4SMasahiro Yamada#
1825b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1826b1fbfcb4SMasahiro Yamada
1827b1fbfcb4SMasahiro Yamadaifdef single-build
1828b1fbfcb4SMasahiro Yamada
1829b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1830b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1831b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1832b1fbfcb4SMasahiro Yamada
1833b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1834b1fbfcb4SMasahiro Yamada	@:
1835b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1836b1fbfcb4SMasahiro Yamada	@:
1837b1fbfcb4SMasahiro Yamada
1838b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1839b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1840b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1841b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1842b1fbfcb4SMasahiro Yamadaendif
1843b1fbfcb4SMasahiro Yamada
1844b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1845596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare
18467f69180bSMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
1847b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1848b1fbfcb4SMasahiro Yamada
1849b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1850b1fbfcb4SMasahiro Yamada
18517f69180bSMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
1852b1fbfcb4SMasahiro Yamada
1853b1fbfcb4SMasahiro Yamada# trim unrelated directories
1854b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1855b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1856b1fbfcb4SMasahiro Yamada
1857b1fbfcb4SMasahiro Yamadaendif
1858b1fbfcb4SMasahiro Yamada
1859b480fec9SMasahiro Yamadaifndef CONFIG_MODULES
1860b480fec9SMasahiro YamadaKBUILD_MODULES :=
1861b480fec9SMasahiro Yamadaendif
1862b480fec9SMasahiro Yamada
1863c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1864c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1865c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1866c99f3918SMasahiro Yamada# make menuconfig etc.
1867c99f3918SMasahiro Yamada# Error messages still appears in the original language
1868c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1869c99f3918SMasahiro Yamadadescend: $(build-dirs)
1870c99f3918SMasahiro Yamada$(build-dirs): prepare
1871b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
187220b1be59SMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
1873b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1874c99f3918SMasahiro Yamada
187576cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
187676cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
187776cd306dSMasahiro Yamada$(clean-dirs):
187876cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
187976cd306dSMasahiro Yamada
188088d7be03SMichal Marekclean: $(clean-dirs)
188188d7be03SMichal Marek	$(call cmd,rmfiles)
188243f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1883ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
18844f0e3a57SRob Herring		-o -name '*.ko.*' \
1885ce88c9c7SViresh Kumar		-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1886ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1887bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
188888d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
18899a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
18904fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
189188d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
18928b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
18936b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1894433db3e2SVinícius Tinti		-o -name '*.ll' \
189538e89184SSami Tolvanen		-o -name '*.gcno' \
189638e89184SSami Tolvanen		-o -name '*.*.symversions' \) -type f -print | xargs rm -f
189788d7be03SMichal Marek
18981da177e4SLinus Torvalds# Generate tags for editors
18991da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1900a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1901858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
19021da177e4SLinus Torvalds
1903f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
19041da177e4SLinus Torvalds	$(call cmd,tags)
19051da177e4SLinus Torvalds
1906eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1907eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1908eb8305aeSMatthias Maennich
1909eb8305aeSMatthias MaennichPHONY += nsdeps
1910bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1911eb8305aeSMatthias Maennichnsdeps: modules
1912bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1913eb8305aeSMatthias Maennich
19143d32285fSMasahiro Yamada# Clang Tooling
19153d32285fSMasahiro Yamada# ---------------------------------------------------------------------------
19163d32285fSMasahiro Yamada
19173d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN     $@
19183d32285fSMasahiro Yamada      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
19193d32285fSMasahiro Yamada
19207f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
19213d32285fSMasahiro Yamada	$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
19223d32285fSMasahiro Yamada	$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
19233d32285fSMasahiro Yamada	$(call if_changed,gen_compile_commands)
19243d32285fSMasahiro Yamada
19257f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json
19263d32285fSMasahiro Yamada
19276ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer
19286ad7cbc0SNathan Huckleberry
19296ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG
19306ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK   $<
19316ad7cbc0SNathan Huckleberry      cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
19326ad7cbc0SNathan Huckleberry
19337f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
19346ad7cbc0SNathan Huckleberry	$(call cmd,clang_tools)
19356ad7cbc0SNathan Huckleberryelse
19366ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer:
19376ad7cbc0SNathan Huckleberry	@echo "$@ requires CC=clang" >&2
19386ad7cbc0SNathan Huckleberry	@false
19396ad7cbc0SNathan Huckleberryendif
19406ad7cbc0SNathan Huckleberry
19411da177e4SLinus Torvalds# Scripts to check various things for consistency
19421da177e4SLinus Torvalds# ---------------------------------------------------------------------------
19431da177e4SLinus Torvalds
19447dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report
1945279f3dd3SPeter Foley
19461da177e4SLinus Torvaldsincludecheck:
1947436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19481da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
194980007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
19501da177e4SLinus Torvalds
19511da177e4SLinus Torvaldsversioncheck:
19522ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19531da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
195480007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
19551da177e4SLinus Torvalds
195674425eeeSNicolas Palixcoccicheck:
1957858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
195874425eeeSNicolas Palix
1959295ac051SAdrian Bunkexport_report:
1960295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1961295ac051SAdrian Bunk
1962c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1963e3ccf6e3SJeff Dike
1964011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1965011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1966011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1967011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1968011e3a9aSJeff Dikeifeq ($(ARCH), um)
1969011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1970011e3a9aSJeff Dikeelse
1971011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1972011e3a9aSJeff Dikeendif
19731da177e4SLinus Torvaldscheckstack:
19741da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
197575dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
19761da177e4SLinus Torvalds
19777b8ea53dSAmerigo Wangkernelrelease:
19787b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
197901ab1788SAmerigo Wang
1980cb58455cSSam Ravnborgkernelversion:
19812244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
19821da177e4SLinus Torvalds
1983c398ff00SMike Marciniszynimage_name:
1984c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1985c398ff00SMike Marciniszyn
19861da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
19870663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
19881da177e4SLinus Torvalds
1989392885eeSMasahiro Yamada# read saved command lines for existing targets
1990392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
19911da177e4SLinus Torvalds
1992b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
19931da177e4SLinus Torvalds
199446b7c492SSZ Lin (林上智)endif # config-build
19952042b548SMasahiro Yamadaendif # mixed-build
1996688931a5SMasahiro Yamadaendif # need-sub-make
19971da177e4SLinus Torvalds
19984f193362SPaul SmithPHONY += FORCE
19991da177e4SLinus TorvaldsFORCE:
20004f193362SPaul Smith
2001bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
2002fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
20034f193362SPaul Smith.PHONY: $(PHONY)
2004