xref: /openbmc/linux/Makefile (revision 5c8166419acf468b5bc3e48f928a040485d3e0c2)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
3e783362eSLinus TorvaldsPATCHLEVEL = 17
455922c9dSLinus TorvaldsSUBLEVEL = 0
5754e0b0eSLinus TorvaldsEXTRAVERSION = -rc4
6754e0b0eSLinus TorvaldsNAME = Superb Owl
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
434f67695c9SElliot BermanKBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
4357f3a59dbSMasahiro Yamada			 -O2 -fomit-frame-pointer -std=gnu89
436f67695c9SElliot BermanKBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
437f67695c9SElliot BermanKBUILD_USERLDFLAGS := $(USERLDFLAGS)
4387f3a59dbSMasahiro Yamada
439f67695c9SElliot BermanKBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
440735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
441f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
442f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4431da177e4SLinus Torvalds
4441da177e4SLinus Torvalds# Make variables (CC, etc...)
4451da177e4SLinus TorvaldsCPP		= $(CC) -E
446a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
447a0d1c951SMasahiro YamadaCC		= clang
448a0d1c951SMasahiro YamadaLD		= ld.lld
449a0d1c951SMasahiro YamadaAR		= llvm-ar
450a0d1c951SMasahiro YamadaNM		= llvm-nm
451a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
452a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
453a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
454a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
455a0d1c951SMasahiro Yamadaelse
456a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
457a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
4581da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4591da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4601da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4611da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
462eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
463a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
464a0d1c951SMasahiro Yamadaendif
465e83b9f55SAndrii NakryikoPAHOLE		= pahole
466c9a0f3b8SJiri OlsaRESOLVE_BTFIDS	= $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
46773a4f6dbSMasahiro YamadaLEX		= flex
46873a4f6dbSMasahiro YamadaYACC		= bison
4691da177e4SLinus TorvaldsAWK		= awk
470caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
471436e980eSDominique MartinetDEPMOD		= depmod
4721da177e4SLinus TorvaldsPERL		= perl
473e9781b52SMasahiro YamadaPYTHON3		= python3
4741da177e4SLinus TorvaldsCHECK		= sparse
475858805b3SMasahiro YamadaBASH		= bash
476e4a42c82SDenis EfremovKGZIP		= gzip
477e4a42c82SDenis EfremovKBZIP2		= bzip2
478e4a42c82SDenis EfremovKLZOP		= lzop
4798dfb61dcSDenis EfremovLZMA		= lzma
4808dfb61dcSDenis EfremovLZ4		= lz4c
4818dfb61dcSDenis EfremovXZ		= xz
48248f7ddf7SNick TerrellZSTD		= zstd
4838dfb61dcSDenis Efremov
4849741e07eSJiri OlsaPAHOLE_FLAGS	= $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
4859741e07eSJiri Olsa
48680a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4876c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4880c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4896588169dSSam RavnborgCFLAGS_MODULE   =
4906588169dSSam RavnborgAFLAGS_MODULE   =
4916588169dSSam RavnborgLDFLAGS_MODULE  =
4921da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4931da177e4SLinus TorvaldsAFLAGS_KERNEL	=
494b36fad65SMichal MarekLDFLAGS_vmlinux =
4951da177e4SLinus Torvalds
496abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
497abbf1590SDavid HowellsUSERINCLUDE    := \
4989d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4999d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
500abbf1590SDavid Howells		-I$(srctree)/include/uapi \
5013308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
502ce6ed1c4SMasahiro Yamada                -include $(srctree)/include/linux/compiler-version.h \
503abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
504abbf1590SDavid Howells
5051da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
5061da177e4SLinus Torvalds# Needed to be compatible with the O= option
507abbf1590SDavid HowellsLINUXINCLUDE    := \
5089d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
5099d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
510051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
511f8224f7fSMasahiro Yamada		-I$(objtree)/include \
512f8224f7fSMasahiro Yamada		$(USERINCLUDE)
5131da177e4SLinus Torvalds
51442a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
515eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
51642a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
517b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
518172aad81SOlaf Hering		   -Werror=return-type -Wno-format-security \
519433dc2ebSMasahiro Yamada		   -std=gnu89
520433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
52180c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
52280c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
5236588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
5246588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
52510df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
526d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
5275241ab4cSMasahiro YamadaCLANG_FLAGS :=
5281da177e4SLinus Torvalds
529aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
530d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
531d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
53248f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
5337bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
534f67695c9SElliot Bermanexport KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
5351da177e4SLinus Torvalds
536d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
5370e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
538222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
5396588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
54080c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
5419741e07eSJiri Olsaexport PAHOLE_FLAGS
5421da177e4SLinus Torvalds
5431da177e4SLinus Torvalds# Files to ignore in find ... statements
5441da177e4SLinus Torvalds
545ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
546ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
547ae63b2d7SPrarit Bhargava			  -prune -o
548450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
549450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
5501da177e4SLinus Torvalds
5511da177e4SLinus Torvalds# ===========================================================================
5521da177e4SLinus Torvalds# Rules shared between *config targets and build targets
5531da177e4SLinus Torvalds
554312a3d09SCao jin# Basic helpers built in scripts/basic/
5554f193362SPaul SmithPHONY += scripts_basic
5561da177e4SLinus Torvaldsscripts_basic:
5571da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
5581da177e4SLinus Torvalds
5594f193362SPaul SmithPHONY += outputmakefile
5602728fcfaSMasahiro Yamadaifdef building_out_of_srctree
561e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
562fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
563fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
564fd5f0cd6SJan Beulich# output directory.
5653a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5663a51ff34SVladimir Kondratiev# ignore whole output directory
5672728fcfaSMasahiro Yamada
5682728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN     Makefile
5692728fcfaSMasahiro Yamada      cmd_makefile = { \
5702728fcfaSMasahiro Yamada	echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
5712728fcfaSMasahiro Yamada	echo "include $(srctree)/Makefile"; \
5722728fcfaSMasahiro Yamada	} > Makefile
5732728fcfaSMasahiro Yamada
5741da177e4SLinus Torvaldsoutputmakefile:
575e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
576e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
577e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
578e8e83a23SMasahiro Yamada		echo >&2 "***"; \
579e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
580e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
581e8e83a23SMasahiro Yamada		echo >&2 "***"; \
582e8e83a23SMasahiro Yamada		false; \
583e8e83a23SMasahiro Yamada	fi
58492979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5852728fcfaSMasahiro Yamada	$(call cmd,makefile)
586156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
587156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
588fd5f0cd6SJan Beulichendif
5891da177e4SLinus Torvalds
590db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
591db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
592db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
593db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade.
5946072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
595db07562aSNick Desaulniers
596db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
5976f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang
598ae6b289aSChris Friesendif
599ae6b289aSChris Fries
60057fd251cSMasahiro Yamada# Include this also for config targets because some architectures need
60157fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE.
602805b2e1dSMasahiro Yamadaifdef need-compiler
60357fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler
604805b2e1dSMasahiro Yamadaendif
60557fd251cSMasahiro Yamada
6062042b548SMasahiro Yamadaifdef config-build
6071da177e4SLinus Torvalds# ===========================================================================
6081da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
6091da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
6101da177e4SLinus Torvalds
6111da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
6121da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
6131da177e4SLinus Torvalds# used for 'make defconfig'
6143204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
615315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
6161da177e4SLinus Torvalds
61736de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
61831110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
61931110ebbSSam Ravnborg
62036de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
6211da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
6221da177e4SLinus Torvalds
6232042b548SMasahiro Yamadaelse #!config-build
6241da177e4SLinus Torvalds# ===========================================================================
6251da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
6261da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
6271da177e4SLinus Torvalds
6282c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
629121c2a13SMasahiro Yamada# but instead __all depend on modules
6302c1f4f12SMasahiro YamadaPHONY += all
6312c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
632121c2a13SMasahiro Yamada__all: all
6332c1f4f12SMasahiro Yamadaelse
634121c2a13SMasahiro Yamada__all: modules
6352c1f4f12SMasahiro Yamadaendif
6362c1f4f12SMasahiro Yamada
6372c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
6382c1f4f12SMasahiro Yamada# Normally, just do built-in.
6392c1f4f12SMasahiro Yamada
6402c1f4f12SMasahiro YamadaKBUILD_MODULES :=
6412c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
6422c1f4f12SMasahiro Yamada
6432c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
6442c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
6454b50c8c4SMasahiro Yamada  KBUILD_BUILTIN :=
6462c1f4f12SMasahiro Yamadaendif
6472c1f4f12SMasahiro Yamada
6482c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
6492c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
6502c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
6512c1f4f12SMasahiro Yamada
6526ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
6532c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6542c1f4f12SMasahiro Yamadaendif
6552c1f4f12SMasahiro Yamada
6562c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6572c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6582c1f4f12SMasahiro Yamadaendif
6592c1f4f12SMasahiro Yamada
6602c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6612c1f4f12SMasahiro Yamada
6622042b548SMasahiro Yamadaifdef need-config
663d93a18f2SMasahiro Yamadainclude include/config/auto.conf
664d93a18f2SMasahiro Yamadaendif
665d93a18f2SMasahiro Yamada
6661da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6671da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
668d92cc4d5SMasahiro Yamadacore-y		:= init/ usr/ arch/$(SRCARCH)/
669f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
670d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
6718b5f4eb3SMasahiro Yamadadrivers-$(CONFIG_NET) += net/
6728b5f4eb3SMasahiro Yamadadrivers-y	+= virt/
6731da177e4SLinus Torvaldslibs-y		:= lib/
6741da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6751da177e4SLinus Torvalds
676315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
677315bab4eSMasahiro Yamada# command line.
678315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
679315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
680315bab4eSMasahiro Yamadaall: vmlinux
681315bab4eSMasahiro Yamada
6827d73c3e9SNick DesaulniersCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage
6837d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
6847d73c3e9SNick DesaulniersCFLAGS_GCOV	+= -fno-tree-loop-im
6857d73c3e9SNick Desaulniersendif
6865aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
687315bab4eSMasahiro Yamada
688b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
689b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
690b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
691b1f4ff74SPaulo Zanoniendif
692b1f4ff74SPaulo Zanoni
6933204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
694315bab4eSMasahiro Yamada
6952042b548SMasahiro Yamadaifdef need-config
6962042b548SMasahiro Yamadaifdef may-sync-config
697315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
698315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
699315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
700d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
7011da177e4SLinus Torvalds
70205850719SMasahiro Yamada$(KCONFIG_CONFIG):
70305850719SMasahiro Yamada	@echo >&2 '***'
70405850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
70505850719SMasahiro Yamada	@echo >&2 '***'
70605850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
70705850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
70805850719SMasahiro Yamada	@echo >&2 '***'
70905850719SMasahiro Yamada	@/bin/false
7101da177e4SLinus Torvalds
71161277981SUlf Magnusson# The actual configuration files used during the build are stored in
71261277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
71361277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
7149390dff6SMasahiro Yamada#
7159390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
7169390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
717f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
718d952cfafSMasahiro Yamada#
719d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
720d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input.
7213044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
722d952cfafSMasahiro Yamada	$(Q)$(kecho) "  SYNC    $@"
723d952cfafSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
7242042b548SMasahiro Yamadaelse # !may-sync-config
725d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
726d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
727d7942413SMasahiro Yamada# Use auto.conf to trigger the test
7289ee4e336SSam RavnborgPHONY += include/config/auto.conf
7299ee4e336SSam Ravnborg
7309ee4e336SSam Ravnborginclude/config/auto.conf:
731264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
7325369f550SMichal Marek	echo >&2;							\
7335369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
7345369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
7355369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
7365369f550SMichal Marek	echo >&2 ;							\
7379ee4e336SSam Ravnborg	/bin/false)
7389ee4e336SSam Ravnborg
739d7942413SMasahiro Yamadaendif # may-sync-config
7402042b548SMasahiro Yamadaendif # need-config
7411da177e4SLinus Torvalds
7427d73c3e9SNick DesaulniersKBUILD_CFLAGS	+= -fno-delete-null-pointer-checks
743ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
744bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
745bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7466f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
747a1c48bb1SGeert Uytterhoeven
74815f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
749a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
75015f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
75115f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
75215f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
75315f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
7541da177e4SLinus Torvaldsendif
7551da177e4SLinus Torvalds
75669102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
7577d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
7587d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to
7597d73c3e9SNick Desaulniers# -fno-allow-store-data-races.
76069102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
761b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
7627d73c3e9SNick Desaulniersendif
76369102311SJiri Kosina
7641873e870SAndi Kleenifdef CONFIG_READABLE_ASM
7651873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
7661873e870SAndi Kleen# reorder blocks reorders the control in the function
7671873e870SAndi Kleen# ipa clone creates specialized cloned functions
7681873e870SAndi Kleen# partial inlining inlines only parts of functions
7697d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
7701873e870SAndi Kleenendif
7711873e870SAndi Kleen
77208f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
773a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
77435bb5b1eSAndi Kleenendif
77535bb5b1eSAndi Kleen
776893ab004SMasahiro Yamadastackp-flags-y                                    := -fno-stack-protector
777050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
778050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
7792a61f474SMasahiro Yamada
7802a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
781e06b8b98SSam Ravnborg
7823fe617ccSLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
783e92e2634SMasahiro YamadaKBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
7843fe617ccSLinus Torvalds
785076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
786a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
7875c6ae0efSNathan Chancellor# The kernel builds with '-std=gnu89' so use of GNU extensions is acceptable.
788a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
789cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
790cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
791cfe17c9bSMasahiro Yamada# See modpost pattern 2
792a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
793d936eb23SLinus Torvaldselse
794d936eb23SLinus Torvalds
79549832c81SRandy Dunlap# gcc inanely warns about local variables called 'main'
79649832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main
797cfe17c9bSMasahiro Yamadaendif
798cfe17c9bSMasahiro Yamada
799885480b0SNathan Chancellor# These warnings generated too much noise in a regular build.
800885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
801885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
8020a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
8036272cc38SNathan Chancellor
8041da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
805a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
8061da177e4SLinus Torvaldselse
8077e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
8087e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
8097e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
8107e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
8117e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
8127e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
813a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
8141da177e4SLinus Torvaldsendif
8157e9501fdSRabin Vincentendif
8161da177e4SLinus Torvalds
817f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern.
818f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN
819709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
820709a972eSKees Cookendif
821709a972eSKees Cook
822f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value.
823f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO
824f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
825f02003c8SKees Cookifdef CONFIG_CC_IS_CLANG
826f02003c8SKees Cook# https://bugs.llvm.org/show_bug.cgi?id=45497
827f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
828f0fe00d4Sglider@google.comendif
829f02003c8SKees Cookendif
830f0fe00d4Sglider@google.com
83139218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes
83239218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers.
83339218ff4SKees CookKBUILD_CFLAGS	+= $(call cc-option, -fno-stack-clash-protection)
83439218ff4SKees Cook
835a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
836a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS
837a82adfd5SKees CookKBUILD_CFLAGS	+= -fzero-call-used-regs=used-gpr
838a82adfd5SKees Cookendif
839a82adfd5SKees Cook
840606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
8413b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC
84207d04081SVasily Gorbik  CC_FLAGS_FTRACE	+= -mrecord-mcount
8432f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8442f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8452f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8462f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8472f4df001SVasily Gorbik    endif
8482f4df001SVasily Gorbik  endif
84907d04081SVasily Gorbikendif
85022c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
85122c8542dSSami Tolvanen  CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
85222c8542dSSami Tolvanenendif
8533b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
8543b15cdc1SSami Tolvanen  ifdef CONFIG_HAVE_C_RECORDMCOUNT
8553b15cdc1SSami Tolvanen    BUILD_C_RECORDMCOUNT := y
8563b15cdc1SSami Tolvanen    export BUILD_C_RECORDMCOUNT
8573b15cdc1SSami Tolvanen  endif
8583b15cdc1SSami Tolvanenendif
859a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
8607d73c3e9SNick Desaulniers  # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
861f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
862f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
863f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
864a2546faeSSteven Rostedt  endif
865f28bc3c3SVasily Gorbikendif
866f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
867f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
868f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
86916444a8aSArnaldo Carvalho de Meloendif
87016444a8aSArnaldo Carvalho de Melo
87191341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
87291341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
8737d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-inline-functions-called-once
87491341d4bSSam Ravnborgendif
87591341d4bSSam Ravnborg
87690ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
877e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
878e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
87990ad4052SMasahiro Yamadaendif
88090ad4052SMasahiro Yamada
881d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK
882d08b9f0cSSami TolvanenCC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
883d08b9f0cSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
884d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS
885d08b9f0cSSami Tolvanenendif
886d08b9f0cSSami Tolvanen
887dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG
888dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN
8892b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto=thin -fsplit-lto-unit
8907f69180bSMasahiro YamadaKBUILD_LDFLAGS	+= --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
891dc5723b0SSami Tolvanenelse
8922b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto
893dc5723b0SSami Tolvanenendif
894dc5723b0SSami TolvanenCC_FLAGS_LTO	+= -fvisibility=hidden
89522d429e7SSami Tolvanen
89622d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size
89722d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5
89824845dcbSNick Desaulniers
8990236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion
9000236526dSTor Vic# when using lld < 13.0.0.
90124845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0)
9020236526dSTor Vicifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
90324845dcbSNick DesaulniersKBUILD_LDFLAGS	+= -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
90424845dcbSNick Desaulniersendif
905dc5723b0SSami Tolvanenendif
9060236526dSTor Vicendif
907dc5723b0SSami Tolvanen
908dc5723b0SSami Tolvanenifdef CONFIG_LTO
9095e95325fSSami TolvanenKBUILD_CFLAGS	+= -fno-lto $(CC_FLAGS_LTO)
9105e95325fSSami TolvanenKBUILD_AFLAGS	+= -fno-lto
911dc5723b0SSami Tolvanenexport CC_FLAGS_LTO
912dc5723b0SSami Tolvanenendif
913dc5723b0SSami Tolvanen
914cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG
915cf68fffbSSami TolvanenCC_FLAGS_CFI	:= -fsanitize=cfi \
916cf68fffbSSami Tolvanen		   -fsanitize-cfi-cross-dso \
917cf68fffbSSami Tolvanen		   -fno-sanitize-cfi-canonical-jump-tables \
918cf68fffbSSami Tolvanen		   -fno-sanitize-trap=cfi \
919cf68fffbSSami Tolvanen		   -fno-sanitize-blacklist
920cf68fffbSSami Tolvanen
921cf68fffbSSami Tolvanenifdef CONFIG_CFI_PERMISSIVE
922cf68fffbSSami TolvanenCC_FLAGS_CFI	+= -fsanitize-recover=cfi
923cf68fffbSSami Tolvanenendif
924cf68fffbSSami Tolvanen
925cf68fffbSSami Tolvanen# If LTO flags are filtered out, we must also filter out CFI.
926cf68fffbSSami TolvanenCC_FLAGS_LTO	+= $(CC_FLAGS_CFI)
927cf68fffbSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_CFI)
928cf68fffbSSami Tolvanenexport CC_FLAGS_CFI
929cf68fffbSSami Tolvanenendif
930cf68fffbSSami Tolvanen
931cf536e18SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B
932cf536e18SFeng TangKBUILD_CFLAGS += -falign-functions=64
93309c60546SFeng Tangendif
93409c60546SFeng Tang
935e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
93604e85bbfSAlexey DobriyanNOSTDINC_FLAGS += -nostdinc
937e8e69931SSam Ravnborg
9381da177e4SLinus Torvalds# warn about C99 declaration after statement
939a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
9401da177e4SLinus Torvalds
9410bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
9428289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
9430bb95f80SKees Cook
944070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
945fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
9461da177e4SLinus Torvalds
947552a23a0SGustavo A. R. Silva# In order to make sure new function cast mismatches are not introduced
948552a23a0SGustavo A. R. Silva# in the kernel (to avoid tripping CFI checking), the kernel should be
949552a23a0SGustavo A. R. Silva# globally built with -Wcast-function-type.
950552a23a0SGustavo A. R. SilvaKBUILD_CFLAGS += $(call cc-option, -Wcast-function-type)
951552a23a0SGustavo A. R. Silva
952217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
953217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
954217c3e01SStephen Rothwell
9555c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
9565c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
9577d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-array-bounds
9585a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
9595c45de21SLinus Torvalds
960adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
961adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
962adc71920SLinus Torvalds
96378a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
9647d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
9657d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized
9667d73c3e9SNick Desaulniersendif
96778a5255fSLinus Torvalds
96886cffecdSKees Cookifdef CONFIG_CC_IS_GCC
96986cffecdSKees Cook# The allocators already balk at large sizes, so silence the compiler
97086cffecdSKees Cook# warnings for bounds checks involving those possible values. While
97186cffecdSKees Cook# -Wno-alloc-size-larger-than would normally be used here, earlier versions
97286cffecdSKees Cook# of gcc (<9.1) weirdly don't handle the option correctly when _other_
97386cffecdSKees Cook# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX
97486cffecdSKees Cook# doesn't work (as it is documented to), silently resolving to "0" prior to
97586cffecdSKees Cook# version 9.1 (and producing an error more recently). Numeric values larger
97686cffecdSKees Cook# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently
97786cffecdSKees Cook# ignored, continuing to default to PTRDIFF_MAX. So, left with no other
97886cffecdSKees Cook# choice, we must perform a versioned check to disable this warning.
97986cffecdSKees Cook# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
98086cffecdSKees CookKBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than)
98186cffecdSKees Cookendif
98286cffecdSKees Cook
983fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
9848b42cf2fSMasahiro YamadaKBUILD_CFLAGS	+= -fno-strict-overflow
985d0115552SLinus Torvalds
9863ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
9877d4eb0d8SMasahiro YamadaKBUILD_CFLAGS  += -fno-stack-check
9883ce120b1SLinus Torvalds
9898f7f5c9fSAndi Kleen# conserve stack if available
9907d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
9917d73c3e9SNick DesaulniersKBUILD_CFLAGS   += -fconserve-stack
9927d73c3e9SNick Desaulniersendif
9938f7f5c9fSAndi Kleen
994fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
99587de84c9SMasahiro YamadaKBUILD_CFLAGS   += -Werror=date-time
996fe7c36c7SJosh Triplett
997ea8daa7bSDaniel Wagner# enforce correct pointer usage
998ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
999ea8daa7bSDaniel Wagner
1000c834f0e8SKees Cook# Require designated initializers for all marked structures
1001c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
1002c834f0e8SKees Cook
1003a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
1004a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1005a73619a8SMasahiro Yamada
1006e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed
1007e0fe0bbeSMasahiro Yamadainclude-y			:= scripts/Makefile.extrawarn
10086947fd96SMasahiro Yamadainclude-$(CONFIG_DEBUG_INFO)	+= scripts/Makefile.debug
1009e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
1010e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
1011e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN)		+= scripts/Makefile.ubsan
1012e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV)		+= scripts/Makefile.kcov
1013e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS)	+= scripts/Makefile.gcc-plugins
1014e0fe0bbeSMasahiro Yamada
1015e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y))
1016a86fe353SMasahiro Yamada
1017132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last.
1018132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel
1019132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point.
1020bf5438fcSJason Baron
10218cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
10228cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
10238cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
10248cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
102552bcc330SSam Ravnborg
1026a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1
1027a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1
102818991197SRoland McGrath
10295d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1030d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
10315d7d18f5SDavid Howellsendif
10325d7d18f5SDavid Howells
10335cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
103427f2a4dbSNick DesaulniersLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr --use-android-relr-tags
10355cf896fbSPeter Collingbourneendif
10365cf896fbSPeter Collingbourne
103759612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the
103859612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script.
103959612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN
104059612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn
104159612b24SNathan Chancellorendif
104259612b24SNathan Chancellor
10437f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
10447f58b487SMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10457f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10467f3a59dbSMasahiro Yamada
104780591e61SLuc Van Oostenryck# make the checker run with the right architecture
104880591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
104980591e61SLuc Van Oostenryck
105014516765SLuc Van Oostenryck# insure the checker run with the right endianness
105114516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
105214516765SLuc Van Oostenryck
10531f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
10541f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
10551f2f01b1SLuc Van Oostenryck
10561da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
10571da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
10581da177e4SLinus Torvalds# set in the environment
10591da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
10601da177e4SLinus Torvalds# this default value
10611da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
10621da177e4SLinus Torvalds
10631da177e4SLinus Torvalds#
10641da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
10651da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
10661da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
10671da177e4SLinus Torvalds
10681da177e4SLinus Torvalds#
1069f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1070f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1071f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
1072f4d4ffc0SJason Cooper#
1073f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1074f4d4ffc0SJason Cooper
1075f4d4ffc0SJason Cooper#
10761da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
10771da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
1078070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
10791da177e4SLinus Torvalds#
10801da177e4SLinus Torvalds
1081df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
10821da177e4SLinus Torvaldsexport MODLIB
10831da177e4SLinus Torvalds
1084e00d8880SMasahiro YamadaPHONY += prepare0
1085e2a666d5SRusty Russell
1086ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
10877f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order
10887f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
108947801c97SMasahiro Yamada
10901da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
10914c928904SMasahiro Yamadacore-y			+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/
10924c928904SMasahiro Yamadacore-$(CONFIG_BLOCK)	+= block/
10931da177e4SLinus Torvalds
109423febe37SMasahiro Yamadavmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
10951da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
109695fb6317SMasahiro Yamada		     $(libs-y) $(libs-m)))
10971da177e4SLinus Torvalds
10981eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
109923febe37SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(core-) \
110095fb6317SMasahiro Yamada			$(drivers-) $(libs-))))
11011da177e4SLinus Torvalds
1102b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \
1103b2c88554SMasahiro Yamada			$(core-y) $(core-m) $(libs-y) $(libs-m) \
1104b2c88554SMasahiro Yamada			$(drivers-y) $(drivers-m)))
11051da177e4SLinus Torvalds
1106c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
110776cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1108c99f3918SMasahiro Yamada
11091f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1110f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1111f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1112f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES
1113f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1114f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1115f0d50ca0SMasahiro Yamadaelse
1116f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1117f0d50ca0SMasahiro Yamadaendif
1118f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1119f0d50ca0SMasahiro Yamada
1120f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
112195698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
112285f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1123233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
11241da177e4SLinus Torvalds
1125d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
11261da177e4SLinus Torvalds
11273fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
11283fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
11292441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
11301f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
11311f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
11321f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
11331f50b80aSMasahiro YamadaKBUILD_MODULES := 1
1134fb2d99beSMasahiro Yamada
1135fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order
1136fb2d99beSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1137fb2d99beSMasahiro Yamada	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
11381f50b80aSMasahiro Yamadaendif
11391f50b80aSMasahiro Yamada
114007a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
114107a422bbSMasahiro Yamada
114288694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
114388694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
114488694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
114588694cffSQuentin Perret
114607a422bbSMasahiro Yamada$(autoksyms_h):
114788694cffSQuentin Perret	$(call cmd,autoksyms_h)
114823121ca2SNicolas Pitre
1149fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1150fbe6e37dSNicholas Piggin
1151fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1152fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
11533ec8a5b3SMasahiro Yamada	$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";    \
1154fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
11552441e78bSNicolas Pitre
11563fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
11570b956e20SRasmus Villemoes	+$(call if_changed_dep,link-vmlinux)
1158741f98feSSam Ravnborg
1159392885eeSMasahiro Yamadatargets := vmlinux
1160392885eeSMasahiro Yamada
11611da177e4SLinus Torvalds# The actual objects are generated when descending,
11621da177e4SLinus Torvalds# make sure no implicit rule kicks in
1163b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
11641da177e4SLinus Torvalds
1165ba97df45SMasahiro Yamadafilechk_kernel.release = \
11660d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
11670d0e7718SMichal Marek
116883a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
116924512795SMasahiro Yamadainclude/config/kernel.release: FORCE
11700d0e7718SMichal Marek	$(call filechk,kernel.release)
1171cb58455cSSam Ravnborg
1172d8821622SMasahiro Yamada# Additional helpers built in scripts/
1173d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1174d8821622SMasahiro Yamada# in parallel
1175d8821622SMasahiro YamadaPHONY += scripts
117660df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1177d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1178cb58455cSSam Ravnborg
11791da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
11805bb78269SSam Ravnborg# or the modules are listed in "prepare".
11815bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
11825bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
11835bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
11841da177e4SLinus Torvalds
1185a5139fb3SMasahiro YamadaPHONY += prepare archprepare
11865bb78269SSam Ravnborg
118736de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
11883044dd05SMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
11891476fee5SMasahiro Yamada	include/generated/autoconf.h remove-stale-files
11905bb78269SSam Ravnborg
119165bba042SMasahiro Yamadaprepare0: archprepare
119260df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
11938d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
119486feeaa8SSam Ravnborg
11951da177e4SLinus Torvalds# All the preparing..
11960d989ac2SMasahiro Yamadaprepare: prepare0
1197b9ab5ebbSJosh Poimboeuf
11981476fee5SMasahiro YamadaPHONY += remove-stale-files
11991476fee5SMasahiro Yamadaremove-stale-files:
12001476fee5SMasahiro Yamada	$(Q)$(srctree)/scripts/remove-stale-files
12011476fee5SMasahiro Yamada
12022c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
12037d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
12047d0e5c20SMasahiro Yamada
12052c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
12062c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1207037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1208037fc336SMasahiro Yamada	generic=include/asm-generic
12092c1f4f12SMasahiro Yamadauapi-asm-generic:
1210037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1211037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
12122c1f4f12SMasahiro Yamada
12131da177e4SLinus Torvalds# Generate some files
12141da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12151da177e4SLinus Torvalds
12161da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
12171da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
12181da177e4SLinus Torvalds
12191da177e4SLinus Torvaldsuts_len := 64
122063104eecSSam Ravnborgdefine filechk_utsrelease.h
12211da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
12221da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
12231da177e4SLinus Torvalds	  exit 1;                                                         \
12241da177e4SLinus Torvalds	fi;                                                               \
1225ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
12261da177e4SLinus Torvaldsendef
12271da177e4SLinus Torvalds
122863104eecSSam Ravnborgdefine filechk_version.h
12299b82f13eSSasha Levin	if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1230ad774086SMasahiro Yamada		echo \#define LINUX_VERSION_CODE $(shell                 \
1231207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
12329b82f13eSSasha Levin	else                                                             \
12339b82f13eSSasha Levin		echo \#define LINUX_VERSION_CODE $(shell                 \
1234207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
12359b82f13eSSasha Levin	fi;                                                              \
12369b82f13eSSasha Levin	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
123788a68672SSasha Levin	((c) > 255 ? 255 : (c)))';                                       \
123888a68672SSasha Levin	echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
123988a68672SSasha Levin	echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
124088a68672SSasha Levin	echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
124163104eecSSam Ravnborgendef
124263104eecSSam Ravnborg
1243*5c816641SMasahiro Yamada$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0)
1244*5c816641SMasahiro Yamada$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0)
124543fee2b2SMasahiro Yamada$(version_h): FORCE
12461da177e4SLinus Torvalds	$(call filechk,version.h)
12471da177e4SLinus Torvalds
1248273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
124963104eecSSam Ravnborg	$(call filechk,utsrelease.h)
125063104eecSSam Ravnborg
1251179efcb4SVegard NossumPHONY += headerdep
1252179efcb4SVegard Nossumheaderdep:
12539663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
12549663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1255179efcb4SVegard Nossum
12561da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12578d730cfbSDavid Woodhouse# Kernel headers
12588d730cfbSDavid Woodhouse
1259e6883b18SSam Ravnborg#Default location for installed headers
1260e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1261e6883b18SSam Ravnborg
126259b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
126359b2bd05SMasahiro Yamada      cmd_headers_install = \
126459b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
126559b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
126659b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
12676d716275SDavid Woodhouse
12688d730cfbSDavid WoodhousePHONY += headers_install
126959b2bd05SMasahiro Yamadaheaders_install: headers
127059b2bd05SMasahiro Yamada	$(call cmd,headers_install)
12714f193362SPaul Smith
12721da177e4SLinus TorvaldsPHONY += archheaders archscripts
12731da177e4SLinus Torvalds
1274a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
12751da177e4SLinus Torvalds
127659b2bd05SMasahiro YamadaPHONY += headers
127759b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
12789d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
12792fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1280d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1281d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
12821f85712eSMike Frysinger
1283e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
128459b2bd05SMasahiro Yamadaprepare: headers
1285e949f4c2SMasahiro Yamadaendif
128668475359SDavid Woodhouse
1287bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1288bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1289bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1290bdd7714bSMasahiro Yamada
12918d730cfbSDavid Woodhouse# ---------------------------------------------------------------------------
129214ccc638SMasahiro Yamada# Install
129314ccc638SMasahiro Yamada
129414ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel.
129514ccc638SMasahiro Yamada# If DKMS is installed, 'make install' will eventually recuses back
129614ccc638SMasahiro Yamada# to the this Makefile to build and install external modules.
129714ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
129814ccc638SMasahiro Yamada
129914ccc638SMasahiro Yamadainstall: sub_make_done :=
130014ccc638SMasahiro Yamada
130114ccc638SMasahiro Yamada# ---------------------------------------------------------------------------
13021bb0b18aSMasahiro Yamada# Tools
13031bb0b18aSMasahiro Yamada
13040d989ac2SMasahiro Yamadaifdef CONFIG_STACK_VALIDATION
13050d989ac2SMasahiro Yamadaprepare: tools/objtool
13060d989ac2SMasahiro Yamadaendif
13070d989ac2SMasahiro Yamada
13080d989ac2SMasahiro Yamadaifdef CONFIG_BPF
13090d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF
13100d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids
13110d989ac2SMasahiro Yamadaendif
13120d989ac2SMasahiro Yamadaendif
13130d989ac2SMasahiro Yamada
13140d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean
13150d989ac2SMasahiro Yamada
13160d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
13170d989ac2SMasahiro Yamada
13180d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist
13190d989ac2SMasahiro Yamada# in output directory, skip its clean in that case
13200d989ac2SMasahiro Yamadaresolve_btfids_clean:
13210d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),)
13220d989ac2SMasahiro Yamada	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
13230d989ac2SMasahiro Yamadaendif
13240d989ac2SMasahiro Yamada
13251bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake
13261bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_)
13271bb0b18aSMasahiro Yamadatools_silent=s
13281bb0b18aSMasahiro Yamadaendif
13291bb0b18aSMasahiro Yamada
13301bb0b18aSMasahiro Yamadatools/: FORCE
13311bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
13321bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
13331bb0b18aSMasahiro Yamada
13341bb0b18aSMasahiro Yamadatools/%: FORCE
13351bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
13361bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
13371bb0b18aSMasahiro Yamada
13381bb0b18aSMasahiro Yamada# ---------------------------------------------------------------------------
13395a5da78bSShuah Khan# Kernel selftest
13405a5da78bSShuah Khan
13415a5da78bSShuah KhanPHONY += kselftest
13425a5da78bSShuah Khankselftest:
13432bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
13445a5da78bSShuah Khan
134517eac6c2SShuah Khankselftest-%: FORCE
134617eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1347dcb825a9SWang Long
13483d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
13493d6dee7aSBamvor Jian Zhangkselftest-merge:
13503d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
13516d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
13526d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
13533e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
13543d6dee7aSBamvor Jian Zhang
13555a5da78bSShuah Khan# ---------------------------------------------------------------------------
135637c8a5faSRob Herring# Devicetree files
135737c8a5faSRob Herring
135837c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
135937c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
136037c8a5faSRob Herringendif
136137c8a5faSRob Herring
136237c8a5faSRob Herringifneq ($(dtstree),)
136337c8a5faSRob Herring
136475e89534SRob Herring%.dtb: include/config/kernel.release scripts_dtc
136575e89534SRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
136637c8a5faSRob Herring
136775e89534SRob Herring%.dtbo: include/config/kernel.release scripts_dtc
136875e89534SRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1369ce88c9c7SViresh Kumar
1370c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1371b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
137237c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
137337c8a5faSRob Herring
137475e89534SRob Herringifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1375e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1376b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1377b5154bf6SMasahiro Yamadaendif
1378b5154bf6SMasahiro Yamada
1379b5154bf6SMasahiro Yamadadtbs_check: dtbs
13804f0e3a57SRob Herring
138137c8a5faSRob Herringdtbs_install:
13822431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
138337c8a5faSRob Herring
138437c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
138537c8a5faSRob Herringall: dtbs
138637c8a5faSRob Herringendif
138737c8a5faSRob Herring
138837c8a5faSRob Herringendif
138937c8a5faSRob Herring
139037c8a5faSRob HerringPHONY += scripts_dtc
139137c8a5faSRob Herringscripts_dtc: scripts_basic
139237c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
139337c8a5faSRob Herring
1394e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1395e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1396e10c4321SMasahiro Yamadaendif
1397e10c4321SMasahiro Yamada
1398c473a8d0SMasahiro YamadaPHONY += dt_binding_check
13994f0e3a57SRob Herringdt_binding_check: scripts_dtc
14004f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
14014f0e3a57SRob Herring
140237c8a5faSRob Herring# ---------------------------------------------------------------------------
14031da177e4SLinus Torvalds# Modules
14041da177e4SLinus Torvalds
14051da177e4SLinus Torvaldsifdef CONFIG_MODULES
14061da177e4SLinus Torvalds
14071da177e4SLinus Torvalds# By default, build modules as well
14081da177e4SLinus Torvalds
140973d1393eSMichal Marekall: modules
14101da177e4SLinus Torvalds
14114b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider
14124b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to
14134b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them.
14144b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS
14154b50c8c4SMasahiro Yamada  KBUILD_BUILTIN := 1
14164b50c8c4SMasahiro Yamadaendif
14174b50c8c4SMasahiro Yamada
14181da177e4SLinus Torvalds# Build modules
1419551559e1STejun Heo#
1420551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1421551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1422551559e1STejun Heo# using awk while concatenating to the final file.
14231da177e4SLinus Torvalds
14244f193362SPaul SmithPHONY += modules
1425596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
14261da177e4SLinus Torvalds
1427b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1428b2c88554SMasahiro Yamada
1429b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE
1430b2c88554SMasahiro Yamada	$(call if_changed,modules_order)
1431b2c88554SMasahiro Yamada
1432b2c88554SMasahiro Yamadatargets += modules.order
1433a6c36632SMichal Marek
14341da177e4SLinus Torvalds# Target to prepare building external modules
14354f193362SPaul SmithPHONY += modules_prepare
1436059bc9fcSMasahiro Yamadamodules_prepare: prepare
1437596b0474SMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
14381da177e4SLinus Torvalds
1439961ab4a3SMasahiro Yamadaexport modules_sign_only :=
14401da177e4SLinus Torvalds
1441961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y)
1442961ab4a3SMasahiro YamadaPHONY += modules_sign
1443961ab4a3SMasahiro Yamadamodules_sign: modules_install
1444961ab4a3SMasahiro Yamada	@:
1445961ab4a3SMasahiro Yamada
1446961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install.
1447961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1448961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),)
1449961ab4a3SMasahiro Yamadamodules_sign_only := y
1450961ab4a3SMasahiro Yamadaendif
1451961ab4a3SMasahiro Yamadaendif
1452961ab4a3SMasahiro Yamada
1453961ab4a3SMasahiro Yamadamodinst_pre :=
1454961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),)
1455961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre
1456961ab4a3SMasahiro Yamadaendif
1457961ab4a3SMasahiro Yamada
1458961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre)
14593e3005dfSMasahiro YamadaPHONY += __modinst_pre
14603e3005dfSMasahiro Yamada__modinst_pre:
14611da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
14621da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
14631da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
14648e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
14651da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
14661da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
14677e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
14681da177e4SLinus Torvalds	fi
14691bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
14702c6d9636SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
14712c6d9636SMasahiro Yamada	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
14721da177e4SLinus Torvalds
14731da177e4SLinus Torvaldsendif # CONFIG_MODULES
14741da177e4SLinus Torvalds
14751da177e4SLinus Torvalds###
14761da177e4SLinus Torvalds# Cleaning is done on three levels.
14771da177e4SLinus Torvalds# make clean     Delete most generated files
14781da177e4SLinus Torvalds#                Leave enough to build external modules
14791da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
14801da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
14811da177e4SLinus Torvalds
14821da177e4SLinus Torvalds# Directories & files removed with 'make clean'
148369bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
14843d32285fSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps \
14854c7858b9SMasahiro Yamada	       compile_commands.json .thinlto-cache
14861da177e4SLinus Torvalds
14871da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
14880663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
148946a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
14900663c68cSMasahiro Yamada		  debian snap tar-install \
14910663c68cSMasahiro Yamada		  .config .config.old .version \
149246457133SMasahiro Yamada		  Module.symvers \
14935cca3606SMasahiro Yamada		  certs/signing_key.pem \
1494b31f2a49SNayna Jain		  certs/x509.genkey \
1495b31f2a49SNayna Jain		  vmlinux-gdb.py \
149646a63d4bSMasahiro Yamada		  *.spec
14971da177e4SLinus Torvalds
14981da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
14991da177e4SLinus Torvalds#
15001da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
15011da177e4SLinus Torvalds
150276cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
15031da177e4SLinus Torvalds
1504bd1ee804SPawel Mollvmlinuxclean:
1505bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1506fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1507bd1ee804SPawel Moll
150850d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean
15091da177e4SLinus Torvalds
15101da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
15111da177e4SLinus Torvalds#
15121da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1513cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
15141da177e4SLinus Torvalds
1515b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
15161da177e4SLinus Torvalds$(mrproper-dirs):
15171da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
15181da177e4SLinus Torvalds
1519b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
15201da177e4SLinus Torvalds	$(call cmd,rmfiles)
15211da177e4SLinus Torvalds
15221da177e4SLinus Torvalds# distclean
15231da177e4SLinus Torvalds#
15244f193362SPaul SmithPHONY += distclean
15251da177e4SLinus Torvalds
15261da177e4SLinus Torvaldsdistclean: mrproper
152719c8d912SMasahiro Yamada	@find . $(RCS_FIND_IGNORE) \
15281da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1529f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
15307a02cec5SMasahiro Yamada		-o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
15317a02cec5SMasahiro Yamada		-o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
15321da177e4SLinus Torvalds		-type f -print | xargs rm -f
15331da177e4SLinus Torvalds
15341da177e4SLinus Torvalds
15351da177e4SLinus Torvalds# Packaging of the kernel to various formats
15361da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15371da177e4SLinus Torvalds
1538bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1539000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1540031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1541000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
15421da177e4SLinus Torvalds
15431da177e4SLinus Torvalds# Brief documentation of the typical targets used
15441da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15451da177e4SLinus Torvalds
15465dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1547a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
15485dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
15495dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
15501da177e4SLinus Torvalds
1551fe69b420SMasahiro YamadaPHONY += help
15521da177e4SLinus Torvaldshelp:
15531da177e4SLinus Torvalds	@echo  'Cleaning targets:'
15545ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
15555cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
15565ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
15575cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
15581da177e4SLinus Torvalds	@echo  ''
15591da177e4SLinus Torvalds	@echo  'Configuration targets:'
15601da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
15611da177e4SLinus Torvalds	@echo  ''
15621da177e4SLinus Torvalds	@echo  'Other generic targets:'
15631da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
15641da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
15651da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
15669cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
15671da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
156840ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1569433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1570433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
157162718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
157262718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1573155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1574c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
15751da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
15761da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1577f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
15783f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
15793f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
15803f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
15812fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
158259df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
15832fb9b1bdSSam Ravnborg	 echo  ''
158431b8cc80SRandy Dunlap	@echo  'Static analysers:'
15851da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1586aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1587ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1588295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
158974425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
15907f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
15916ad7cbc0SNathan Huckleberry	@echo  '  clang-analyzer  - Check with clang static analyzer'
15926ad7cbc0SNathan Huckleberry	@echo  '  clang-tidy      - Check with clang-tidy'
159374425eeeSNicolas Palix	@echo  ''
1594eb8305aeSMatthias Maennich	@echo  'Tools:'
1595eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1596eb8305aeSMatthias Maennich	@echo  ''
159731b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1598e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
15995a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
16005a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1601e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1602e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1603e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1604dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1605e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1606e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
16075a5da78bSShuah Khan	@echo  ''
160837c8a5faSRob Herring	@$(if $(dtstree), \
160937c8a5faSRob Herring		echo 'Devicetree:'; \
161037c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
161137c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
16127aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
16137aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
161437c8a5faSRob Herring		echo '')
161537c8a5faSRob Herring
161631b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
161731b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
161831b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
161931b8cc80SRandy Dunlap	@echo  ''
16201da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1621000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
16221da177e4SLinus Torvalds	@echo  ''
16231da177e4SLinus Torvalds	@echo  'Documentation targets:'
1624cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
16251da177e4SLinus Torvalds	@echo  ''
162601dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
1627*5c816641SMasahiro Yamada	@$(or $(archhelp),\
162801dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
16291da177e4SLinus Torvalds	@echo  ''
16301da177e4SLinus Torvalds	@$(if $(boards), \
16311da177e4SLinus Torvalds		$(foreach b, $(boards), \
16324234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
16331da177e4SLinus Torvalds		echo '')
16345dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
16355dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
16365dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
16375dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
16385dffbe81SSegher Boessenkool		echo '')
16391da177e4SLinus Torvalds
16401da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
164145d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
16421da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1643a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1644a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1645701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1646af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1647e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
164828bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
164928bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
165028bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1651a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
16521da177e4SLinus Torvalds	@echo  ''
16531da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
16541da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
16551da177e4SLinus Torvalds
16561da177e4SLinus Torvalds
16575dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
16585dffbe81SSegher Boessenkool
16595dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
16605dffbe81SSegher Boessenkool
1661fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
16625dffbe81SSegher Boessenkool
16635dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
16645dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
16655dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
16665dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
16675dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
16685dffbe81SSegher Boessenkool		echo '')
16695dffbe81SSegher Boessenkool
16705dffbe81SSegher Boessenkool
16711da177e4SLinus Torvalds# Documentation targets
16721da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1673e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1674e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
167522cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1676bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1677cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
16781da177e4SLinus Torvalds
167967274c08SMasahiro Yamada# Misc
168067274c08SMasahiro Yamada# ---------------------------------------------------------------------------
168167274c08SMasahiro Yamada
168267274c08SMasahiro YamadaPHONY += scripts_gdb
16837a739ce5SMasahiro Yamadascripts_gdb: prepare0
16841e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
16858d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
168667274c08SMasahiro Yamada
168767274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
168867274c08SMasahiro Yamadaall: scripts_gdb
168967274c08SMasahiro Yamadaendif
169067274c08SMasahiro Yamada
16911da177e4SLinus Torvaldselse # KBUILD_EXTMOD
16921da177e4SLinus Torvalds
16931da177e4SLinus Torvalds###
16941da177e4SLinus Torvalds# External module support.
16951da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
16961da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
16971da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
169811122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used.
16991da177e4SLinus Torvalds
17006212804fSMasahiro Yamada# We are always building only modules.
17016212804fSMasahiro YamadaKBUILD_BUILTIN :=
17021da177e4SLinus TorvaldsKBUILD_MODULES := 1
17031da177e4SLinus Torvalds
1704c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
17053d32285fSMasahiro Yamada$(MODORDER): descend
17063d32285fSMasahiro Yamada	@:
17073d32285fSMasahiro Yamada
17087f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json
17093d32285fSMasahiro YamadaPHONY += compile_commands.json
17103d32285fSMasahiro Yamada
171176cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
17123d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1713dc5723b0SSami Tolvanen	$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
17141da177e4SLinus Torvalds
17156072b2c4SMasahiro YamadaPHONY += prepare
17166072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations
17176072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
17186072b2c4SMasahiro Yamadaprepare:
1719129ab0d2SMasahiro Yamada	@if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \
17206072b2c4SMasahiro Yamada		echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
1721129ab0d2SMasahiro Yamada		echo >&2 "  The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \
17226072b2c4SMasahiro Yamada		echo >&2 "  You are using:           $(CC_VERSION_TEXT)"; \
17236072b2c4SMasahiro Yamada	fi
17246072b2c4SMasahiro Yamada
1725fe69b420SMasahiro YamadaPHONY += help
17261da177e4SLinus Torvaldshelp:
17271da177e4SLinus Torvalds	@echo  '  Building external modules.'
17281da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
17291da177e4SLinus Torvalds	@echo  ''
17301da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
17311da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
17321da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
17331da177e4SLinus Torvalds	@echo  ''
173406300b21SSam Ravnborg
1735596b0474SMasahiro Yamada# no-op for external module builds
17366072b2c4SMasahiro YamadaPHONY += modules_prepare
1737596b0474SMasahiro Yamada
17381da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
17391da177e4SLinus Torvalds
17403e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
17413e3005dfSMasahiro Yamada# Modules
17423e3005dfSMasahiro Yamada
17433e3005dfSMasahiro YamadaPHONY += modules modules_install
17443e3005dfSMasahiro Yamada
17453e3005dfSMasahiro Yamadaifdef CONFIG_MODULES
17463e3005dfSMasahiro Yamada
17471a998be6SMasahiro Yamadamodules: modules_check
17483e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
17493e3005dfSMasahiro Yamada
17501a998be6SMasahiro YamadaPHONY += modules_check
17511a998be6SMasahiro Yamadamodules_check: $(MODORDER)
17521a998be6SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
17531a998be6SMasahiro Yamada
17543ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD  $(MODLIB)
17553e3005dfSMasahiro Yamada      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
17563e3005dfSMasahiro Yamada                   $(KERNELRELEASE)
17573e3005dfSMasahiro Yamada
17583e3005dfSMasahiro Yamadamodules_install:
17593e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
17603e3005dfSMasahiro Yamada	$(call cmd,depmod)
17613e3005dfSMasahiro Yamada
17623e3005dfSMasahiro Yamadaelse # CONFIG_MODULES
17633e3005dfSMasahiro Yamada
17643e3005dfSMasahiro Yamada# Modules not configured
17653e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
17663e3005dfSMasahiro Yamada
17673e3005dfSMasahiro Yamadamodules modules_install:
17683e3005dfSMasahiro Yamada	@echo >&2 '***'
17693e3005dfSMasahiro Yamada	@echo >&2 '*** The present kernel configuration has modules disabled.'
17703e3005dfSMasahiro Yamada	@echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
17713e3005dfSMasahiro Yamada	@echo >&2 '*** to enable CONFIG_MODULES.'
17723e3005dfSMasahiro Yamada	@echo >&2 '***'
17733e3005dfSMasahiro Yamada	@exit 1
17743e3005dfSMasahiro Yamada
17753e3005dfSMasahiro Yamadaendif # CONFIG_MODULES
17763e3005dfSMasahiro Yamada
1777b1fbfcb4SMasahiro Yamada# Single targets
1778b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1779b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1780b1fbfcb4SMasahiro Yamada#
1781b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1782b1fbfcb4SMasahiro Yamada#
1783b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1784b1fbfcb4SMasahiro Yamada#
1785b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1786b1fbfcb4SMasahiro Yamada#
1787b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1788b1fbfcb4SMasahiro Yamada
1789b1fbfcb4SMasahiro Yamadaifdef single-build
1790b1fbfcb4SMasahiro Yamada
1791b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1792b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1793b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1794b1fbfcb4SMasahiro Yamada
1795b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1796b1fbfcb4SMasahiro Yamada	@:
1797b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1798b1fbfcb4SMasahiro Yamada	@:
1799b1fbfcb4SMasahiro Yamada
1800b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1801b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1802b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1803b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1804b1fbfcb4SMasahiro Yamadaendif
1805b1fbfcb4SMasahiro Yamada
1806b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1807596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare
18087f69180bSMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
1809b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1810b1fbfcb4SMasahiro Yamada
1811b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1812b1fbfcb4SMasahiro Yamada
18137f69180bSMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
1814b1fbfcb4SMasahiro Yamada
1815b1fbfcb4SMasahiro Yamada# trim unrelated directories
1816b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1817b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1818b1fbfcb4SMasahiro Yamada
1819b1fbfcb4SMasahiro Yamadaendif
1820b1fbfcb4SMasahiro Yamada
1821b480fec9SMasahiro Yamadaifndef CONFIG_MODULES
1822b480fec9SMasahiro YamadaKBUILD_MODULES :=
1823b480fec9SMasahiro Yamadaendif
1824b480fec9SMasahiro Yamada
1825c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1826c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1827c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1828c99f3918SMasahiro Yamada# make menuconfig etc.
1829c99f3918SMasahiro Yamada# Error messages still appears in the original language
1830c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1831c99f3918SMasahiro Yamadadescend: $(build-dirs)
1832c99f3918SMasahiro Yamada$(build-dirs): prepare
1833b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
183420b1be59SMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
1835b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1836c99f3918SMasahiro Yamada
183776cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
183876cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
183976cd306dSMasahiro Yamada$(clean-dirs):
184076cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
184176cd306dSMasahiro Yamada
184288d7be03SMichal Marekclean: $(clean-dirs)
184388d7be03SMichal Marek	$(call cmd,rmfiles)
1844*5c816641SMasahiro Yamada	@find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1845ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
18464f0e3a57SRob Herring		-o -name '*.ko.*' \
1847ce88c9c7SViresh Kumar		-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1848ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1849bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
185088d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
18519a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
18524fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
185388d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
18548b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
18556b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1856433db3e2SVinícius Tinti		-o -name '*.ll' \
185738e89184SSami Tolvanen		-o -name '*.gcno' \
185838e89184SSami Tolvanen		-o -name '*.*.symversions' \) -type f -print | xargs rm -f
185988d7be03SMichal Marek
18601da177e4SLinus Torvalds# Generate tags for editors
18611da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1862a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1863858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
18641da177e4SLinus Torvalds
1865f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
18661da177e4SLinus Torvalds	$(call cmd,tags)
18671da177e4SLinus Torvalds
1868eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1869eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1870eb8305aeSMatthias Maennich
1871eb8305aeSMatthias MaennichPHONY += nsdeps
1872bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1873eb8305aeSMatthias Maennichnsdeps: modules
1874bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1875eb8305aeSMatthias Maennich
18763d32285fSMasahiro Yamada# Clang Tooling
18773d32285fSMasahiro Yamada# ---------------------------------------------------------------------------
18783d32285fSMasahiro Yamada
18793d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN     $@
18803d32285fSMasahiro Yamada      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
18813d32285fSMasahiro Yamada
18827f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
18833d32285fSMasahiro Yamada	$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
18843d32285fSMasahiro Yamada	$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
18853d32285fSMasahiro Yamada	$(call if_changed,gen_compile_commands)
18863d32285fSMasahiro Yamada
18877f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json
18883d32285fSMasahiro Yamada
18896ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer
18906ad7cbc0SNathan Huckleberry
18916ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG
18926ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK   $<
18936ad7cbc0SNathan Huckleberry      cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
18946ad7cbc0SNathan Huckleberry
18957f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
18966ad7cbc0SNathan Huckleberry	$(call cmd,clang_tools)
18976ad7cbc0SNathan Huckleberryelse
18986ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer:
18996ad7cbc0SNathan Huckleberry	@echo "$@ requires CC=clang" >&2
19006ad7cbc0SNathan Huckleberry	@false
19016ad7cbc0SNathan Huckleberryendif
19026ad7cbc0SNathan Huckleberry
19031da177e4SLinus Torvalds# Scripts to check various things for consistency
19041da177e4SLinus Torvalds# ---------------------------------------------------------------------------
19051da177e4SLinus Torvalds
19067dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report
1907279f3dd3SPeter Foley
19081da177e4SLinus Torvaldsincludecheck:
1909436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19101da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
191180007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
19121da177e4SLinus Torvalds
19131da177e4SLinus Torvaldsversioncheck:
19142ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19151da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
191680007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
19171da177e4SLinus Torvalds
191874425eeeSNicolas Palixcoccicheck:
1919858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
192074425eeeSNicolas Palix
1921295ac051SAdrian Bunkexport_report:
1922295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1923295ac051SAdrian Bunk
1924c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1925e3ccf6e3SJeff Dike
1926011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1927011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1928011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1929011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1930011e3a9aSJeff Dikeifeq ($(ARCH), um)
1931011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1932011e3a9aSJeff Dikeelse
1933011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1934011e3a9aSJeff Dikeendif
19351da177e4SLinus Torvaldscheckstack:
19361da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
193775dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
19381da177e4SLinus Torvalds
19397b8ea53dSAmerigo Wangkernelrelease:
19407b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
194101ab1788SAmerigo Wang
1942cb58455cSSam Ravnborgkernelversion:
19432244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
19441da177e4SLinus Torvalds
1945c398ff00SMike Marciniszynimage_name:
1946c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1947c398ff00SMike Marciniszyn
19481da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
19490663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
19501da177e4SLinus Torvalds
1951392885eeSMasahiro Yamada# read saved command lines for existing targets
1952392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
19531da177e4SLinus Torvalds
1954b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
19551da177e4SLinus Torvalds
195646b7c492SSZ Lin (林上智)endif # config-build
19572042b548SMasahiro Yamadaendif # mixed-build
1958688931a5SMasahiro Yamadaendif # need-sub-make
19591da177e4SLinus Torvalds
19604f193362SPaul SmithPHONY += FORCE
19611da177e4SLinus TorvaldsFORCE:
19624f193362SPaul Smith
1963bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1964fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
19654f193362SPaul Smith.PHONY: $(PHONY)
1966