xref: /openbmc/linux/Makefile (revision d8d2d38275c1b2d3936c0d809e0559e88912fbb5)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
35c8fe583SLinus TorvaldsPATCHLEVEL = 11
455922c9dSLinus TorvaldsSUBLEVEL = 0
519c329f6SLinus TorvaldsEXTRAVERSION = -rc4
6d6d5df1dSLinus TorvaldsNAME = Kleptomaniac Octopus
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 --%,$(MAKEFLAGS))),)
98066b7ed9SMichal Marek  quiet=silent_
99066b7ed9SMichal Marekendif
100066b7ed9SMichal Marek
101066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
102066b7ed9SMichal Marek
10325b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
10425b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
10525b146c5SMasahiro Yamada#
10625b146c5SMasahiro Yamada# For example, you can do this:
10725b146c5SMasahiro Yamada#
10825b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
10925b146c5SMasahiro Yamada#
11025b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
11125b146c5SMasahiro Yamada# two syntaxes to specify it.
11225b146c5SMasahiro Yamada#
1131da177e4SLinus Torvalds# 1) O=
1141da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1151da177e4SLinus Torvalds#
1161da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
11725b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
11825b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1191da177e4SLinus Torvalds#
1201da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1211da177e4SLinus Torvalds# variable.
1221da177e4SLinus Torvalds
12325b146c5SMasahiro Yamada# Do we want to change the working directory?
1241da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1251da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1261da177e4SLinus Torvaldsendif
1271da177e4SLinus Torvalds
12825b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
12925b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
13025b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
13125b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
13225b146c5SMasahiro Yamada$(if $(abs_objtree),, \
13325b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
13425b146c5SMasahiro Yamada
13525b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
13625b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
13725b146c5SMasahiro Yamadaelse
13825b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
13925b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
14025b146c5SMasahiro Yamada
14125b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
14225b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
14325b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
14425b146c5SMasahiro Yamadaelse
14525b146c5SMasahiro Yamadaneed-sub-make := 1
14651193b76SRobert Jarzmikendif
14751193b76SRobert Jarzmik
14825b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
1491da177e4SLinus Torvalds
15025b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
15125b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
15225b146c5SMasahiro Yamadaendif
15325b146c5SMasahiro Yamada
15425b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
15580463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
15680463f1bSMasahiro Yamada#
15780463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
15825b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
15925b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
160688931a5SMasahiro Yamadaneed-sub-make := 1
16125b146c5SMasahiro Yamadaendif
1623812b8c5SMasahiro Yamada
16393fdddfeSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST))
16493fdddfeSMasahiro Yamada
165688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
166688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
167688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
168688931a5SMasahiro Yamadaneed-sub-make := 1
169688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
17093fdddfeSMasahiro Yamada$(this-makefile): ;
171688931a5SMasahiro Yamadaendif
172688931a5SMasahiro Yamada
17325b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
174221cc2d2SMasahiro Yamadaexport sub_make_done := 1
175221cc2d2SMasahiro Yamada
176688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
177688931a5SMasahiro Yamada
178121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make
1790b35786dSMilton Miller
180121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
18116f89098SCharles Keepax	@:
1820b35786dSMilton Miller
183c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
184121c2a13SMasahiro Yamada__sub-make:
18525b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
1861da177e4SLinus Torvalds
187688931a5SMasahiro Yamadaendif # need-sub-make
188221cc2d2SMasahiro Yamadaendif # sub_make_done
189688931a5SMasahiro Yamada
1901da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
191688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
1921da177e4SLinus Torvalds
1937ff52571SMasahiro Yamada# Do not print "Entering directory ...",
1947ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
1957ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
1967ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
1977ff52571SMasahiro Yamada
198aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
199aa55c8e2SMasahiro Yamada# C compilation.
200aa55c8e2SMasahiro Yamada#
201aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
202aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
203aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
204aa55c8e2SMasahiro Yamada#
205036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
206036db11cSCao jin# including where to get the "sparse" utility.
207aa55c8e2SMasahiro Yamada
208aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
209aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
210aa55c8e2SMasahiro Yamadaendif
211aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
212aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
213aa55c8e2SMasahiro Yamadaendif
214aa55c8e2SMasahiro Yamada
2157e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
2167e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
217aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
218aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
219aa55c8e2SMasahiro Yamadaendif
220aa55c8e2SMasahiro Yamada
221e9e81b63SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \
222e9e81b63SMasahiro Yamada	$(error building multiple external modules is not supported))
223e9e81b63SMasahiro Yamada
224051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD
225051f278eSMasahiro Yamada
226394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
227394053f4SMasahiro Yamada
22825b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
2299da0763bSMichal Marek        # building in the source tree
2309da0763bSMichal Marek        srctree := .
231051f278eSMasahiro Yamada	building_out_of_srctree :=
2329da0763bSMichal Marekelse
23325b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
2349da0763bSMichal Marek                # building in a subdirectory of the source tree
2359da0763bSMichal Marek                srctree := ..
2369da0763bSMichal Marek        else
23725b146c5SMasahiro Yamada                srctree := $(abs_srctree)
2389da0763bSMichal Marek        endif
239051f278eSMasahiro Yamada	building_out_of_srctree := 1
2409da0763bSMichal Marekendif
2412c1f4f12SMasahiro Yamada
24295fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
24395fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
24495fd3f87SMasahiro Yamadaendif
2452c1f4f12SMasahiro Yamada
2467e1c0477SMichal Marekobjtree		:= .
2476b12de69SMasahiro YamadaVPATH		:= $(srctree)
2481da177e4SLinus Torvalds
249051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
2501da177e4SLinus Torvalds
2512c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2522c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2532c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2542c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2552c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2562c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2572c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2582c1f4f12SMasahiro Yamada
2592c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2602c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
2612c1f4f12SMasahiro Yamada
26222340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
26322340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2642c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
26559b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
2664623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
2674623980dSDavid Engraf			 outputmakefile
268efbf9726SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease
269394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
2702c1f4f12SMasahiro Yamada
2712042b548SMasahiro Yamadaconfig-build	:=
2722042b548SMasahiro Yamadamixed-build	:=
2732042b548SMasahiro Yamadaneed-config	:= 1
274d7942413SMasahiro Yamadamay-sync-config	:= 1
275394053f4SMasahiro Yamadasingle-build	:=
2762c1f4f12SMasahiro Yamada
2772c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2782c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2792042b548SMasahiro Yamada		need-config :=
2802c1f4f12SMasahiro Yamada	endif
2812c1f4f12SMasahiro Yamadaendif
2822c1f4f12SMasahiro Yamada
283d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
284d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
2852042b548SMasahiro Yamada		may-sync-config :=
286d7942413SMasahiro Yamada	endif
287d7942413SMasahiro Yamadaendif
288d7942413SMasahiro Yamada
289d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
2902042b548SMasahiro Yamada	may-sync-config :=
291d7942413SMasahiro Yamadaendif
292d7942413SMasahiro Yamada
2932c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
294efbf9726SMasahiro Yamada        ifneq ($(filter %config,$(MAKECMDGOALS)),)
2952042b548SMasahiro Yamada		config-build := 1
2962c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
2972042b548SMasahiro Yamada			mixed-build := 1
2982c1f4f12SMasahiro Yamada                endif
2992c1f4f12SMasahiro Yamada        endif
3002c1f4f12SMasahiro Yamadaendif
30122340a06SMasahiro Yamada
302394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
303394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
304394053f4SMasahiro Yamada	single-build := 1
305394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
306394053f4SMasahiro Yamada		mixed-build := 1
307394053f4SMasahiro Yamada	endif
308394053f4SMasahiro Yamadaendif
309394053f4SMasahiro Yamada
31022340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
31122340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
31222340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3132042b548SMasahiro Yamada		mixed-build := 1
31422340a06SMasahiro Yamada        endif
31522340a06SMasahiro Yamadaendif
31622340a06SMasahiro Yamada
3172c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3182c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3192c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3202042b548SMasahiro Yamada		mixed-build := 1
3212c1f4f12SMasahiro Yamada        endif
3222c1f4f12SMasahiro Yamadaendif
3232c1f4f12SMasahiro Yamada
3242042b548SMasahiro Yamadaifdef mixed-build
3252c1f4f12SMasahiro Yamada# ===========================================================================
3262c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3272c1f4f12SMasahiro Yamada# Handle them one by one.
3282c1f4f12SMasahiro Yamada
3292c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3302c1f4f12SMasahiro Yamada
331121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one
3322c1f4f12SMasahiro Yamada	@:
3332c1f4f12SMasahiro Yamada
3342c1f4f12SMasahiro Yamada__build_one_by_one:
3352c1f4f12SMasahiro Yamada	$(Q)set -e; \
3362c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3372c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3382c1f4f12SMasahiro Yamada	done
3392c1f4f12SMasahiro Yamada
3402042b548SMasahiro Yamadaelse # !mixed-build
3412c1f4f12SMasahiro Yamada
3422c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
3432c1f4f12SMasahiro Yamada
3442c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3452c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3462c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3472c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3482c1f4f12SMasahiro Yamada
349b2d35fa5SAnders Roxellinclude scripts/subarch.include
3501da177e4SLinus Torvalds
3511da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3521da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3531da177e4SLinus Torvalds#
3541da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3551da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3561da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3571da177e4SLinus Torvalds# make ARCH=ia64
3581da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3591da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3601da177e4SLinus Torvalds
3611da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3621da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3631da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3641da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3651da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3661da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3671da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3681da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3692331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3701da177e4SLinus Torvalds
3711da177e4SLinus Torvalds# Architecture as present in compile.h
3721da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3736752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3741da177e4SLinus Torvalds
375d746d647SSam Ravnborg# Additional ARCH settings for x86
376d746d647SSam Ravnborgifeq ($(ARCH),i386)
377d746d647SSam Ravnborg        SRCARCH := x86
378d746d647SSam Ravnborgendif
379d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
380d746d647SSam Ravnborg        SRCARCH := x86
381d746d647SSam Ravnborgendif
38274b469f2SSam Ravnborg
3835e538790SSam Ravnborg# Additional ARCH settings for sparc
384e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
385e69f58c0SNamhyung Kim       SRCARCH := sparc
386e69f58c0SNamhyung Kimendif
387a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
3885e538790SSam Ravnborg       SRCARCH := sparc
389a439fe51SSam Ravnborgendif
3902fb9b1bdSSam Ravnborg
3913cc000b5SPaul Mundt# Additional ARCH settings for sh
3923cc000b5SPaul Mundtifeq ($(ARCH),sh64)
3933cc000b5SPaul Mundt       SRCARCH := sh
3943cc000b5SPaul Mundtendif
3953cc000b5SPaul Mundt
39614cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
39741263fc6SBen Gardinerexport KCONFIG_CONFIG
39814cdd3c4SRoman Zippel
3992a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
4002a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig
4012a86f661SMasahiro Yamada
4021da177e4SLinus Torvalds# SHELL used by kbuild
403858805b3SMasahiro YamadaCONFIG_SHELL := sh
4041da177e4SLinus Torvalds
4056d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
4066d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4076d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
408d7f14c66SUwe Kleine-König
409a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
410a0d1c951SMasahiro YamadaHOSTCC	= clang
411a0d1c951SMasahiro YamadaHOSTCXX	= clang++
412a0d1c951SMasahiro Yamadaelse
4131da177e4SLinus TorvaldsHOSTCC	= gcc
4141da177e4SLinus TorvaldsHOSTCXX	= g++
415a0d1c951SMasahiro Yamadaendif
4167f3a59dbSMasahiro Yamada
4177f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
4187f3a59dbSMasahiro Yamada			      -O2 -fomit-frame-pointer -std=gnu89
4197f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS :=
4207f3a59dbSMasahiro Yamada
4217f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS   := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
422735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
423f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
424f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4251da177e4SLinus Torvalds
4261da177e4SLinus Torvalds# Make variables (CC, etc...)
4271da177e4SLinus TorvaldsCPP		= $(CC) -E
428a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
429a0d1c951SMasahiro YamadaCC		= clang
430a0d1c951SMasahiro YamadaLD		= ld.lld
431a0d1c951SMasahiro YamadaAR		= llvm-ar
432a0d1c951SMasahiro YamadaNM		= llvm-nm
433a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
434a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
435a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
436a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
437a0d1c951SMasahiro Yamadaelse
438a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
439a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
4401da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4411da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4421da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4431da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
444eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
445a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
446a0d1c951SMasahiro Yamadaendif
447e83b9f55SAndrii NakryikoPAHOLE		= pahole
448c9a0f3b8SJiri OlsaRESOLVE_BTFIDS	= $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
44973a4f6dbSMasahiro YamadaLEX		= flex
45073a4f6dbSMasahiro YamadaYACC		= bison
4511da177e4SLinus TorvaldsAWK		= awk
452caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
453436e980eSDominique MartinetDEPMOD		= depmod
4541da177e4SLinus TorvaldsPERL		= perl
455e9781b52SMasahiro YamadaPYTHON3		= python3
4561da177e4SLinus TorvaldsCHECK		= sparse
457858805b3SMasahiro YamadaBASH		= bash
458e4a42c82SDenis EfremovKGZIP		= gzip
459e4a42c82SDenis EfremovKBZIP2		= bzip2
460e4a42c82SDenis EfremovKLZOP		= lzop
4618dfb61dcSDenis EfremovLZMA		= lzma
4628dfb61dcSDenis EfremovLZ4		= lz4c
4638dfb61dcSDenis EfremovXZ		= xz
46448f7ddf7SNick TerrellZSTD		= zstd
4658dfb61dcSDenis Efremov
46680a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4676c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4680c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4696588169dSSam RavnborgCFLAGS_MODULE   =
4706588169dSSam RavnborgAFLAGS_MODULE   =
4716588169dSSam RavnborgLDFLAGS_MODULE  =
4721da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4731da177e4SLinus TorvaldsAFLAGS_KERNEL	=
474b36fad65SMichal MarekLDFLAGS_vmlinux =
4751da177e4SLinus Torvalds
476abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
477abbf1590SDavid HowellsUSERINCLUDE    := \
4789d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4799d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
480abbf1590SDavid Howells		-I$(srctree)/include/uapi \
4813308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
482abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
483abbf1590SDavid Howells
4841da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
4851da177e4SLinus Torvalds# Needed to be compatible with the O= option
486abbf1590SDavid HowellsLINUXINCLUDE    := \
4879d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
4889d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
489051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
490f8224f7fSMasahiro Yamada		-I$(objtree)/include \
491f8224f7fSMasahiro Yamada		$(USERINCLUDE)
4921da177e4SLinus Torvalds
49342a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
494eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
49542a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
496b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
497172aad81SOlaf Hering		   -Werror=return-type -Wno-format-security \
498433dc2ebSMasahiro Yamada		   -std=gnu89
499433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
50080c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
50180c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
5026588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
5036588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
50410df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
505d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
5065241ab4cSMasahiro YamadaCLANG_FLAGS :=
5071da177e4SLinus Torvalds
508aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
509d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
510*d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
51148f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
5127bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
5131da177e4SLinus Torvalds
514d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
5150e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
516222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
5176588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
51880c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
5191da177e4SLinus Torvalds
5201da177e4SLinus Torvalds# Files to ignore in find ... statements
5211da177e4SLinus Torvalds
522ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
523ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
524ae63b2d7SPrarit Bhargava			  -prune -o
525450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
526450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
5271da177e4SLinus Torvalds
5281da177e4SLinus Torvalds# ===========================================================================
5291da177e4SLinus Torvalds# Rules shared between *config targets and build targets
5301da177e4SLinus Torvalds
531312a3d09SCao jin# Basic helpers built in scripts/basic/
5324f193362SPaul SmithPHONY += scripts_basic
5331da177e4SLinus Torvaldsscripts_basic:
5341da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
535638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
5361da177e4SLinus Torvalds
5374f193362SPaul SmithPHONY += outputmakefile
538e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
539fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
540fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
541fd5f0cd6SJan Beulich# output directory.
5423a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5433a51ff34SVladimir Kondratiev# ignore whole output directory
5441da177e4SLinus Torvaldsoutputmakefile:
545051f278eSMasahiro Yamadaifdef building_out_of_srctree
546e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
547e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
548e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
549e8e83a23SMasahiro Yamada		echo >&2 "***"; \
550e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
551e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
552e8e83a23SMasahiro Yamada		echo >&2 "***"; \
553e8e83a23SMasahiro Yamada		false; \
554e8e83a23SMasahiro Yamada	fi
55592979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5564fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
557156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
558156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
559fd5f0cd6SJan Beulichendif
5601da177e4SLinus Torvalds
56199516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
562ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
5635241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
564ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
565ca9b31f6SFangrui SongCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
566ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
567ae6b289aSChris Friesendif
568ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
569238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
570ae6b289aSChris Friesendif
5717e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1)
572238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
573876a0600SNathan Chancellorendif
574589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
575238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
576238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
5773bd98050SJoel Stanleyexport CLANG_FLAGS
578ae6b289aSChris Friesendif
579ae6b289aSChris Fries
580315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
581315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
582315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
583315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
584902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
585315bab4eSMasahiro Yamada
5862042b548SMasahiro Yamadaifdef config-build
5871da177e4SLinus Torvalds# ===========================================================================
5881da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
5891da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
5901da177e4SLinus Torvalds
5911da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
5921da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
5931da177e4SLinus Torvalds# used for 'make defconfig'
594a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
595315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
5961da177e4SLinus Torvalds
59736de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
59831110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
59931110ebbSSam Ravnborg
60036de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
6011da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
6021da177e4SLinus Torvalds
6032042b548SMasahiro Yamadaelse #!config-build
6041da177e4SLinus Torvalds# ===========================================================================
6051da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
6061da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
6071da177e4SLinus Torvalds
6082c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
609121c2a13SMasahiro Yamada# but instead __all depend on modules
6102c1f4f12SMasahiro YamadaPHONY += all
6112c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
612121c2a13SMasahiro Yamada__all: all
6132c1f4f12SMasahiro Yamadaelse
614121c2a13SMasahiro Yamada__all: modules
6152c1f4f12SMasahiro Yamadaendif
6162c1f4f12SMasahiro Yamada
6172c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
6182c1f4f12SMasahiro Yamada# Normally, just do built-in.
6192c1f4f12SMasahiro Yamada
6202c1f4f12SMasahiro YamadaKBUILD_MODULES :=
6212c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
6222c1f4f12SMasahiro Yamada
6232c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
6242c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
6254b50c8c4SMasahiro Yamada  KBUILD_BUILTIN :=
6262c1f4f12SMasahiro Yamadaendif
6272c1f4f12SMasahiro Yamada
6282c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
6292c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
6302c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
6312c1f4f12SMasahiro Yamada
6326ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
6332c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6342c1f4f12SMasahiro Yamadaendif
6352c1f4f12SMasahiro Yamada
6362c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6372c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6382c1f4f12SMasahiro Yamadaendif
6392c1f4f12SMasahiro Yamada
6402c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6412c1f4f12SMasahiro Yamada
6422042b548SMasahiro Yamadaifdef need-config
643d93a18f2SMasahiro Yamadainclude include/config/auto.conf
644d93a18f2SMasahiro Yamadaendif
645d93a18f2SMasahiro Yamada
6461da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6471da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
64823febe37SMasahiro Yamadacore-y		:= init/ usr/
649f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
650d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
65195fb6317SMasahiro Yamadadrivers-y	+= net/ virt/
6521da177e4SLinus Torvaldslibs-y		:= lib/
6531da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6541da177e4SLinus Torvalds
655315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
656315bab4eSMasahiro Yamada# command line.
657315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
658315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
659315bab4eSMasahiro Yamadaall: vmlinux
660315bab4eSMasahiro Yamada
661315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
662315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
663315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
6645aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
665315bab4eSMasahiro Yamada
666b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
667b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
668b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
669b1f4ff74SPaulo Zanoniendif
670b1f4ff74SPaulo Zanoni
671669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
672669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
673669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
674669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
675669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
676669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
677669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
678669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
679669e06b1SMasahiro Yamada
680315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
681315bab4eSMasahiro Yamada
6822042b548SMasahiro Yamadaifdef need-config
6832042b548SMasahiro Yamadaifdef may-sync-config
684315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
685315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
686315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
687d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
6881da177e4SLinus Torvalds
68905850719SMasahiro Yamada$(KCONFIG_CONFIG):
69005850719SMasahiro Yamada	@echo >&2 '***'
69105850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
69205850719SMasahiro Yamada	@echo >&2 '***'
69305850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
69405850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
69505850719SMasahiro Yamada	@echo >&2 '***'
69605850719SMasahiro Yamada	@/bin/false
6971da177e4SLinus Torvalds
69861277981SUlf Magnusson# The actual configuration files used during the build are stored in
69961277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
70061277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
7019390dff6SMasahiro Yamada#
7029390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
7039390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
704f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
70523cd88c9SMasahiro Yamadaquiet_cmd_syncconfig = SYNC    $@
70623cd88c9SMasahiro Yamada      cmd_syncconfig = $(MAKE) -f $(srctree)/Makefile syncconfig
70723cd88c9SMasahiro Yamada
7083044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
70923cd88c9SMasahiro Yamada	+$(call cmd,syncconfig)
7102042b548SMasahiro Yamadaelse # !may-sync-config
711d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
712d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
713d7942413SMasahiro Yamada# Use auto.conf to trigger the test
7149ee4e336SSam RavnborgPHONY += include/config/auto.conf
7159ee4e336SSam Ravnborg
7169ee4e336SSam Ravnborginclude/config/auto.conf:
717264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
7185369f550SMichal Marek	echo >&2;							\
7195369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
7205369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
7215369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
7225369f550SMichal Marek	echo >&2 ;							\
7239ee4e336SSam Ravnborg	/bin/false)
7249ee4e336SSam Ravnborg
725d7942413SMasahiro Yamadaendif # may-sync-config
7262042b548SMasahiro Yamadaendif # need-config
7271da177e4SLinus Torvalds
728a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
729ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
730bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
731bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7326f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
733a1c48bb1SGeert Uytterhoeven
73415f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
735a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
73615f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
73715f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
73815f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
73915f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
7401da177e4SLinus Torvaldsendif
7411da177e4SLinus Torvalds
74269102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
74369102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
744b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
74569102311SJiri Kosina
7461873e870SAndi Kleenifdef CONFIG_READABLE_ASM
7471873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
7481873e870SAndi Kleen# reorder blocks reorders the control in the function
7491873e870SAndi Kleen# ipa clone creates specialized cloned functions
7501873e870SAndi Kleen# partial inlining inlines only parts of functions
7511873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
7521873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
7531873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
7541873e870SAndi Kleenendif
7551873e870SAndi Kleen
75608f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
757a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
75835bb5b1eSAndi Kleenendif
75935bb5b1eSAndi Kleen
760893ab004SMasahiro Yamadastackp-flags-y                                    := -fno-stack-protector
761050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
762050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
7632a61f474SMasahiro Yamada
7642a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
765e06b8b98SSam Ravnborg
766076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
767a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
768a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
769a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
770cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
771cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
772cfe17c9bSMasahiro Yamada# See modpost pattern 2
773a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
774cfe17c9bSMasahiro Yamadaelse
775cfe17c9bSMasahiro Yamada
776cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
777cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
7789df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
779e2079e93SNathan Chancellor
780e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
781e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
782e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
783e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
784cfe17c9bSMasahiro Yamadaendif
785cfe17c9bSMasahiro Yamada
7860a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
7871da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
788a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
7891da177e4SLinus Torvaldselse
7907e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
7917e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
7927e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
7937e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
7947e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
7957e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
796a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
7971da177e4SLinus Torvaldsendif
7987e9501fdSRabin Vincentendif
7991da177e4SLinus Torvalds
800f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern.
801f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN
802709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
803709a972eSKees Cookendif
804709a972eSKees Cook
805f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value.
806f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO
807f0fe00d4Sglider@google.com# Future support for zero initialization is still being debated, see
808f0fe00d4Sglider@google.com# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
809f0fe00d4Sglider@google.com# renamed or dropped.
810f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
811f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
812f0fe00d4Sglider@google.comendif
813f0fe00d4Sglider@google.com
814121c5d08SMark Wielaard# Workaround for GCC versions < 5.0
815121c5d08SMark Wielaard# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
816121c5d08SMark Wielaardifdef CONFIG_CC_IS_GCC
817121c5d08SMark WielaardDEBUG_CFLAGS	:= $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
818121c5d08SMark Wielaardendif
8192062afb4SLinus Torvalds
8201da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
821695afd3dSSedat Dilek
822866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
8239d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
824866ced95SAndi Kleenelse
8251e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
826866ced95SAndi Kleenendif
827695afd3dSSedat Dilek
828b8a90923SNick Desaulniersifneq ($(LLVM_IAS),1)
8292288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
830b8a90923SNick Desaulniersendif
831695afd3dSSedat Dilek
832bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
8339d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
834bfaf2dd3SAndi Kleenendif
8351da177e4SLinus Torvalds
836d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
8371e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
838e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
839d6f4ceb7SAndi Kleenendif
840d6f4ceb7SAndi Kleen
84110e68b02SNick Desaulniersifdef CONFIG_DEBUG_INFO_COMPRESSED
84210e68b02SNick DesaulniersDEBUG_CFLAGS	+= -gz=zlib
8437b169944SArvind SankarKBUILD_AFLAGS	+= -gz=zlib
84410e68b02SNick DesaulniersKBUILD_LDFLAGS	+= --compress-debug-sections=zlib
84510e68b02SNick Desaulniersendif
84610e68b02SNick Desaulniers
847695afd3dSSedat Dilekendif # CONFIG_DEBUG_INFO
848695afd3dSSedat Dilek
8491e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
8501e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
8511e88e415SMasahiro Yamada
852606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
85307d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
85407d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
85507d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
85607d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
85707d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
858a2546faeSSteven Rostedt  endif
8592f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8602f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8612f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8622f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8632f4df001SVasily Gorbik    endif
8642f4df001SVasily Gorbik  endif
86507d04081SVasily Gorbikendif
866a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
867f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
868f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
869f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
870a2546faeSSteven Rostedt  endif
871f28bc3c3SVasily Gorbikendif
872f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
873f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
874f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
87572441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
876cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
87772441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
87872441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
87972441cb1SSteven Rostedt	endif
88072441cb1SSteven Rostedtendif
88116444a8aSArnaldo Carvalho de Meloendif
88216444a8aSArnaldo Carvalho de Melo
88391341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
88491341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
88591341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
88691341d4bSSam Ravnborgendif
88791341d4bSSam Ravnborg
88890ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
889e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
890e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
89190ad4052SMasahiro Yamadaendif
89290ad4052SMasahiro Yamada
893d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK
894d08b9f0cSSami TolvanenCC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
895d08b9f0cSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
896d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS
897d08b9f0cSSami Tolvanenendif
898d08b9f0cSSami Tolvanen
89909c60546SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B
90009c60546SFeng TangKBUILD_CFLAGS += -falign-functions=32
90109c60546SFeng Tangendif
90209c60546SFeng Tang
903e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
904e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
905e8e69931SSam Ravnborg
9061da177e4SLinus Torvalds# warn about C99 declaration after statement
907a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
9081da177e4SLinus Torvalds
9090bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
9108289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
9110bb95f80SKees Cook
912070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
913fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
9141da177e4SLinus Torvalds
915217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
916217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
917217c3e01SStephen Rothwell
9185c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
9195c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
92044720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
9215a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
9225c45de21SLinus Torvalds
923adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
924adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
925adc71920SLinus Torvalds
92678a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
92778a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
92878a5255fSLinus Torvalds
929fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
9308b42cf2fSMasahiro YamadaKBUILD_CFLAGS	+= -fno-strict-overflow
931d0115552SLinus Torvalds
9323ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
9337d4eb0d8SMasahiro YamadaKBUILD_CFLAGS  += -fno-stack-check
9343ce120b1SLinus Torvalds
9358f7f5c9fSAndi Kleen# conserve stack if available
9368f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
9378f7f5c9fSAndi Kleen
938fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
93987de84c9SMasahiro YamadaKBUILD_CFLAGS   += -Werror=date-time
940fe7c36c7SJosh Triplett
941ea8daa7bSDaniel Wagner# enforce correct pointer usage
942ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
943ea8daa7bSDaniel Wagner
944c834f0e8SKees Cook# Require designated initializers for all marked structures
945c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
946c834f0e8SKees Cook
947a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
948a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
949a73619a8SMasahiro Yamada
95029be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is
95129be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern
95229be86d7SSeth Forsheeifdef CONFIG_RETPOLINE
95329be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
95429be86d7SSeth Forsheeendif
95529be86d7SSeth Forshee
956e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed
957e0fe0bbeSMasahiro Yamadainclude-y			:= scripts/Makefile.extrawarn
958e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
959e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
960e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN)		+= scripts/Makefile.ubsan
961e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV)		+= scripts/Makefile.kcov
962e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS)	+= scripts/Makefile.gcc-plugins
963e0fe0bbeSMasahiro Yamada
964e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y))
965a86fe353SMasahiro Yamada
966132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last.
967132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel
968132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point.
969bf5438fcSJason Baron
9708cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
9718cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
9728cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
9738cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
97452bcc330SSam Ravnborg
975a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1
976a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1
97718991197SRoland McGrath
9785d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
979d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
9805d7d18f5SDavid Howellsendif
9815d7d18f5SDavid Howells
9825cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
9835cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
9845cf896fbSPeter Collingbourneendif
9855cf896fbSPeter Collingbourne
98659612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the
98759612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script.
98859612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN
98959612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn
99059612b24SNathan Chancellorendif
99159612b24SNathan Chancellor
9927f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
9937f58b487SMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
9947f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
9957f3a59dbSMasahiro Yamada
99680591e61SLuc Van Oostenryck# make the checker run with the right architecture
99780591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
99880591e61SLuc Van Oostenryck
99914516765SLuc Van Oostenryck# insure the checker run with the right endianness
100014516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
100114516765SLuc Van Oostenryck
10021f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
10031f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
10041f2f01b1SLuc Van Oostenryck
10051da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
10061da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
10071da177e4SLinus Torvalds# set in the environment
10081da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
10091da177e4SLinus Torvalds# this default value
10101da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
10111da177e4SLinus Torvalds
10121da177e4SLinus Torvalds#
10131da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
10141da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
10151da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
10161da177e4SLinus Torvalds
10171da177e4SLinus Torvalds#
1018f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1019f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1020f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
1021f4d4ffc0SJason Cooper#
1022f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1023f4d4ffc0SJason Cooper
1024f4d4ffc0SJason Cooper#
10251da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
10261da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
1027070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
10281da177e4SLinus Torvalds#
10291da177e4SLinus Torvalds
1030df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
10311da177e4SLinus Torvaldsexport MODLIB
10321da177e4SLinus Torvalds
1033ac031f26STheodore Ts'o#
10342ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
10352ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
10362ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
1037177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
10382ea03891SSam Ravnborg
1039ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
1040ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
10412ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
1042ac031f26STheodore Ts'oelse
10432ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
1044ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
1045ac031f26STheodore Ts'oelse
10462ea03891SSam Ravnborgmod_strip_cmd = true
1047ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
1048ac031f26STheodore Ts'oexport mod_strip_cmd
1049ac031f26STheodore Ts'o
1050beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
1051beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
1052beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
1053beb50df3SBertrand Jacquin
1054beb50df3SBertrand Jacquinmod_compress_cmd = true
1055beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
1056beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
1057e4a42c82SDenis Efremov    mod_compress_cmd = $(KGZIP) -n -f
1058beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
1059beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
10608dfb61dcSDenis Efremov    mod_compress_cmd = $(XZ) -f
1061beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
1062beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
1063beb50df3SBertrand Jacquinexport mod_compress_cmd
1064beb50df3SBertrand Jacquin
1065d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
10663ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
10673ee550f1SDavid Woodhouse
10683ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1069e2a666d5SRusty Russellelse
1070e2a666d5SRusty Russellmod_sign_cmd = true
1071e2a666d5SRusty Russellendif
1072e2a666d5SRusty Russellexport mod_sign_cmd
1073e2a666d5SRusty Russell
1074056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1075056d28d1SRolf Eike Beer
107633a57ce0SJiri Olsahas_libelf = $(call try-run,\
1077056d28d1SRolf Eike Beer               echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
107833a57ce0SJiri Olsa
107933a57ce0SJiri Olsaifdef CONFIG_STACK_VALIDATION
10809f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
10819f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
10829f0c18aeSJosh Poimboeuf  else
10839f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
10849f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
10859f0c18aeSJosh Poimboeuf  endif
10869f0c18aeSJosh Poimboeufendif
10879f0c18aeSJosh Poimboeuf
1088017dab34SJiri Olsaifdef CONFIG_BPF
108933a57ce0SJiri Olsaifdef CONFIG_DEBUG_INFO_BTF
109033a57ce0SJiri Olsa  ifeq ($(has_libelf),1)
109133a57ce0SJiri Olsa    resolve_btfids_target := tools/bpf/resolve_btfids FORCE
109233a57ce0SJiri Olsa  else
109333a57ce0SJiri Olsa    ERROR_RESOLVE_BTFIDS := 1
109433a57ce0SJiri Olsa  endif
1095017dab34SJiri Olsaendif # CONFIG_DEBUG_INFO_BTF
1096017dab34SJiri Olsaendif # CONFIG_BPF
109733a57ce0SJiri Olsa
1098e00d8880SMasahiro YamadaPHONY += prepare0
1099e2a666d5SRusty Russell
1100394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
1101bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
110247801c97SMasahiro Yamada
11031da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1104cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
11051da177e4SLinus Torvalds
110623febe37SMasahiro Yamadavmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
11071da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
110895fb6317SMasahiro Yamada		     $(libs-y) $(libs-m)))
11091da177e4SLinus Torvalds
11101eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
111123febe37SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(core-) \
111295fb6317SMasahiro Yamada			$(drivers-) $(libs-))))
11131da177e4SLinus Torvalds
1114b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \
1115b2c88554SMasahiro Yamada			$(core-y) $(core-m) $(libs-y) $(libs-m) \
1116b2c88554SMasahiro Yamada			$(drivers-y) $(drivers-m)))
11171da177e4SLinus Torvalds
1118c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
111976cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1120c99f3918SMasahiro Yamada
11211f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1122f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1123f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1124f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES
1125f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1126f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1127f0d50ca0SMasahiro Yamadaelse
1128f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1129f0d50ca0SMasahiro Yamadaendif
1130f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1131f0d50ca0SMasahiro Yamada
1132f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
113395698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
113485f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1135233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
11361da177e4SLinus Torvalds
1137d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
11381da177e4SLinus Torvalds
11393fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
11403fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
11412441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
11421f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
11431f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
11441f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
11451f50b80aSMasahiro YamadaKBUILD_MODULES := 1
1146fb2d99beSMasahiro Yamada
1147fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order
1148fb2d99beSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1149fb2d99beSMasahiro Yamada	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
11501f50b80aSMasahiro Yamadaendif
11511f50b80aSMasahiro Yamada
115207a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
115307a422bbSMasahiro Yamada
115488694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
115588694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
115688694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
115788694cffSQuentin Perret
115807a422bbSMasahiro Yamada$(autoksyms_h):
115988694cffSQuentin Perret	$(call cmd,autoksyms_h)
116023121ca2SNicolas Pitre
1161fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1162fbe6e37dSNicholas Piggin
1163fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1164fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
11653ec8a5b3SMasahiro Yamada	$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";    \
1166fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
11672441e78bSNicolas Pitre
11683fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
11691f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1170741f98feSSam Ravnborg
1171392885eeSMasahiro Yamadatargets := vmlinux
1172392885eeSMasahiro Yamada
11731da177e4SLinus Torvalds# The actual objects are generated when descending,
11741da177e4SLinus Torvalds# make sure no implicit rule kicks in
1175b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
11761da177e4SLinus Torvalds
1177ba97df45SMasahiro Yamadafilechk_kernel.release = \
11780d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
11790d0e7718SMichal Marek
118083a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
118124512795SMasahiro Yamadainclude/config/kernel.release: FORCE
11820d0e7718SMichal Marek	$(call filechk,kernel.release)
1183cb58455cSSam Ravnborg
1184d8821622SMasahiro Yamada# Additional helpers built in scripts/
1185d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1186d8821622SMasahiro Yamada# in parallel
1187d8821622SMasahiro YamadaPHONY += scripts
118860df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1189d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1190cb58455cSSam Ravnborg
11911da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
11925bb78269SSam Ravnborg# or the modules are listed in "prepare".
11935bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
11945bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
11955bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
11961da177e4SLinus Torvalds
1197a5139fb3SMasahiro YamadaPHONY += prepare archprepare
11985bb78269SSam Ravnborg
119936de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
12003044dd05SMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
12013044dd05SMasahiro Yamada	include/generated/autoconf.h
12025bb78269SSam Ravnborg
120365bba042SMasahiro Yamadaprepare0: archprepare
120460df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
12058d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
120686feeaa8SSam Ravnborg
12071da177e4SLinus Torvalds# All the preparing..
120833a57ce0SJiri Olsaprepare: prepare0 prepare-objtool prepare-resolve_btfids
1209b9ab5ebbSJosh Poimboeuf
12102c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
12117d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
12127d0e5c20SMasahiro Yamada
12132c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
12142c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1215037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1216037fc336SMasahiro Yamada	generic=include/asm-generic
12172c1f4f12SMasahiro Yamadauapi-asm-generic:
1218037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1219037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
12202c1f4f12SMasahiro Yamada
122133a57ce0SJiri OlsaPHONY += prepare-objtool prepare-resolve_btfids
12223b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1223ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1224ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1225ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1226ef7cfd00SMasahiro Yamada	@false
1227ef7cfd00SMasahiro Yamadaelse
1228ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1229ef7cfd00SMasahiro Yamadaendif
1230ef7cfd00SMasahiro Yamadaendif
12311da177e4SLinus Torvalds
123233a57ce0SJiri Olsaprepare-resolve_btfids: $(resolve_btfids_target)
123333a57ce0SJiri Olsaifeq ($(ERROR_RESOLVE_BTFIDS),1)
123433a57ce0SJiri Olsa	@echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
123533a57ce0SJiri Olsa	@false
123633a57ce0SJiri Olsaendif
12371da177e4SLinus Torvalds# Generate some files
12381da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12391da177e4SLinus Torvalds
12401da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
12411da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
12421da177e4SLinus Torvalds
12431da177e4SLinus Torvaldsuts_len := 64
124463104eecSSam Ravnborgdefine filechk_utsrelease.h
12451da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
12461da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
12471da177e4SLinus Torvalds	  exit 1;                                                         \
12481da177e4SLinus Torvalds	fi;                                                               \
1249ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
12501da177e4SLinus Torvaldsendef
12511da177e4SLinus Torvalds
125263104eecSSam Ravnborgdefine filechk_version.h
1253ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
125478d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1255ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
125663104eecSSam Ravnborgendef
125763104eecSSam Ravnborg
125843fee2b2SMasahiro Yamada$(version_h): FORCE
12591da177e4SLinus Torvalds	$(call filechk,version.h)
1260223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
12611da177e4SLinus Torvalds
1262273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
126363104eecSSam Ravnborg	$(call filechk,utsrelease.h)
126463104eecSSam Ravnborg
1265179efcb4SVegard NossumPHONY += headerdep
1266179efcb4SVegard Nossumheaderdep:
12679663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
12689663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1269179efcb4SVegard Nossum
12701da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12718d730cfbSDavid Woodhouse# Kernel headers
12728d730cfbSDavid Woodhouse
1273e6883b18SSam Ravnborg#Default location for installed headers
1274e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1275e6883b18SSam Ravnborg
127659b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
127759b2bd05SMasahiro Yamada      cmd_headers_install = \
127859b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
127959b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
128059b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
12816d716275SDavid Woodhouse
12828d730cfbSDavid WoodhousePHONY += headers_install
128359b2bd05SMasahiro Yamadaheaders_install: headers
128459b2bd05SMasahiro Yamada	$(call cmd,headers_install)
12854f193362SPaul Smith
12861da177e4SLinus TorvaldsPHONY += archheaders archscripts
12871da177e4SLinus Torvalds
1288a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
12891da177e4SLinus Torvalds
129059b2bd05SMasahiro YamadaPHONY += headers
129159b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
12929d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
12932fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1294d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1295d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
12961f85712eSMike Frysinger
12977ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
129868475359SDavid WoodhousePHONY += headers_check
12997ecaf069SMasahiro Yamadaheaders_check:
13007ecaf069SMasahiro Yamada	@:
130168475359SDavid Woodhouse
1302e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
130359b2bd05SMasahiro Yamadaprepare: headers
1304e949f4c2SMasahiro Yamadaendif
13051da177e4SLinus Torvalds
1306bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1307bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1308bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1309bdd7714bSMasahiro Yamada
13101da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13115a5da78bSShuah Khan# Kernel selftest
13125a5da78bSShuah Khan
13135a5da78bSShuah KhanPHONY += kselftest
13145a5da78bSShuah Khankselftest:
13152bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
13165a5da78bSShuah Khan
131717eac6c2SShuah Khankselftest-%: FORCE
131817eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1319dcb825a9SWang Long
13203d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
13213d6dee7aSBamvor Jian Zhangkselftest-merge:
13223d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
13236d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
13246d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
13253e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
13263d6dee7aSBamvor Jian Zhang
13275a5da78bSShuah Khan# ---------------------------------------------------------------------------
132837c8a5faSRob Herring# Devicetree files
132937c8a5faSRob Herring
133037c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
133137c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
133237c8a5faSRob Herringendif
133337c8a5faSRob Herring
133437c8a5faSRob Herringifneq ($(dtstree),)
133537c8a5faSRob Herring
1336a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
133737c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
133837c8a5faSRob Herring
1339c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1340b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
134137c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
134237c8a5faSRob Herring
1343b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1344e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1345b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1346b5154bf6SMasahiro Yamadaendif
1347b5154bf6SMasahiro Yamada
1348b5154bf6SMasahiro Yamadadtbs_check: dtbs
13494f0e3a57SRob Herring
135037c8a5faSRob Herringdtbs_install:
13512431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
135237c8a5faSRob Herring
135337c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
135437c8a5faSRob Herringall: dtbs
135537c8a5faSRob Herringendif
135637c8a5faSRob Herring
135737c8a5faSRob Herringendif
135837c8a5faSRob Herring
135937c8a5faSRob HerringPHONY += scripts_dtc
136037c8a5faSRob Herringscripts_dtc: scripts_basic
136137c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
136237c8a5faSRob Herring
1363e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1364e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1365e10c4321SMasahiro Yamadaendif
1366e10c4321SMasahiro Yamada
1367c473a8d0SMasahiro YamadaPHONY += dt_binding_check
13684f0e3a57SRob Herringdt_binding_check: scripts_dtc
13694f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
13704f0e3a57SRob Herring
137137c8a5faSRob Herring# ---------------------------------------------------------------------------
13721da177e4SLinus Torvalds# Modules
13731da177e4SLinus Torvalds
13741da177e4SLinus Torvaldsifdef CONFIG_MODULES
13751da177e4SLinus Torvalds
13761da177e4SLinus Torvalds# By default, build modules as well
13771da177e4SLinus Torvalds
137873d1393eSMichal Marekall: modules
13791da177e4SLinus Torvalds
13804b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider
13814b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to
13824b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them.
13834b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS
13844b50c8c4SMasahiro Yamada  KBUILD_BUILTIN := 1
13854b50c8c4SMasahiro Yamadaendif
13864b50c8c4SMasahiro Yamada
13871da177e4SLinus Torvalds# Build modules
1388551559e1STejun Heo#
1389551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1390551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1391551559e1STejun Heo# using awk while concatenating to the final file.
13921da177e4SLinus Torvalds
13934f193362SPaul SmithPHONY += modules
1394596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
1395b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
13961da177e4SLinus Torvalds
13978451791dSMasahiro YamadaPHONY += modules_check
13988451791dSMasahiro Yamadamodules_check: modules.order
13998451791dSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
14001da177e4SLinus Torvalds
1401b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1402b2c88554SMasahiro Yamada
1403b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE
1404b2c88554SMasahiro Yamada	$(call if_changed,modules_order)
1405b2c88554SMasahiro Yamada
1406b2c88554SMasahiro Yamadatargets += modules.order
1407a6c36632SMichal Marek
14081da177e4SLinus Torvalds# Target to prepare building external modules
14094f193362SPaul SmithPHONY += modules_prepare
1410059bc9fcSMasahiro Yamadamodules_prepare: prepare
1411596b0474SMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
14121da177e4SLinus Torvalds
14131da177e4SLinus Torvalds# Target to install modules
14144f193362SPaul SmithPHONY += modules_install
14151da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
14161da177e4SLinus Torvalds
14174f193362SPaul SmithPHONY += _modinst_
14182c6d9636SMasahiro Yamada_modinst_:
14191da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
14201da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
14211da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
14228e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
14231da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
14241da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
14257e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
14261da177e4SLinus Torvalds	fi
14271bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
14282c6d9636SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
14292c6d9636SMasahiro Yamada	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1430b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
14311da177e4SLinus Torvalds
143250a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
14331da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
14341da177e4SLinus Torvalds# boot script depmod is the master version.
14354f193362SPaul SmithPHONY += _modinst_post
14366d128e1eSLinus Torvalds_modinst_post: _modinst_
143750a8ec31SSam Ravnborg	$(call cmd,depmod)
14381da177e4SLinus Torvalds
1439d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1440d890f510SJosh BoyerPHONY += modules_sign
1441d890f510SJosh Boyermodules_sign:
1442d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1443d890f510SJosh Boyerendif
1444d890f510SJosh Boyer
14451da177e4SLinus Torvaldselse # CONFIG_MODULES
14461da177e4SLinus Torvalds
14471da177e4SLinus Torvalds# Modules not configured
14481da177e4SLinus Torvalds# ---------------------------------------------------------------------------
14491da177e4SLinus Torvalds
1450612e47ceSMasahiro YamadaPHONY += modules modules_install
1451612e47ceSMasahiro Yamadamodules modules_install:
14525369f550SMichal Marek	@echo >&2
14535369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
14545369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
14555369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
14565369f550SMichal Marek	@echo >&2
14571da177e4SLinus Torvalds	@exit 1
14581da177e4SLinus Torvalds
14591da177e4SLinus Torvaldsendif # CONFIG_MODULES
14601da177e4SLinus Torvalds
14611da177e4SLinus Torvalds###
14621da177e4SLinus Torvalds# Cleaning is done on three levels.
14631da177e4SLinus Torvalds# make clean     Delete most generated files
14641da177e4SLinus Torvalds#                Leave enough to build external modules
14651da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
14661da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
14671da177e4SLinus Torvalds
14681da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1469269a535cSMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers \
14703d32285fSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps \
14713d32285fSMasahiro Yamada	       compile_commands.json
14721da177e4SLinus Torvalds
14731da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
14740663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
147546a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
14760663c68cSMasahiro Yamada		  debian snap tar-install \
14770663c68cSMasahiro Yamada		  .config .config.old .version \
147846457133SMasahiro Yamada		  Module.symvers \
1479fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1480fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
148146a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
148246a63d4bSMasahiro Yamada		  *.spec
14831da177e4SLinus Torvalds
148446457133SMasahiro Yamada# Directories & files removed with 'make distclean'
148546457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
148646457133SMasahiro Yamada
14871da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
14881da177e4SLinus Torvalds#
14891da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
14901da177e4SLinus Torvalds
149176cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
14921da177e4SLinus Torvalds
1493bd1ee804SPawel Mollvmlinuxclean:
1494bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1495fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1496bd1ee804SPawel Moll
1497bd1ee804SPawel Mollclean: archclean vmlinuxclean
14981da177e4SLinus Torvalds
14991da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
15001da177e4SLinus Torvalds#
15011da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1502cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
15031da177e4SLinus Torvalds
1504b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
15051da177e4SLinus Torvalds$(mrproper-dirs):
15061da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
15071da177e4SLinus Torvalds
1508b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
15091da177e4SLinus Torvalds	$(call cmd,rmfiles)
15101da177e4SLinus Torvalds
15111da177e4SLinus Torvalds# distclean
15121da177e4SLinus Torvalds#
151346457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
151446457133SMasahiro Yamada
15154f193362SPaul SmithPHONY += distclean
15161da177e4SLinus Torvalds
15171da177e4SLinus Torvaldsdistclean: mrproper
151846457133SMasahiro Yamada	$(call cmd,rmfiles)
15191da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
15201da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1521f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1522f78271dfSMasahiro Yamada		-o -name 'core' \) \
15231da177e4SLinus Torvalds		-type f -print | xargs rm -f
15241da177e4SLinus Torvalds
15251da177e4SLinus Torvalds
15261da177e4SLinus Torvalds# Packaging of the kernel to various formats
15271da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15281da177e4SLinus Torvalds
1529bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1530000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1531031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1532000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
15331da177e4SLinus Torvalds
15341da177e4SLinus Torvalds# Brief documentation of the typical targets used
15351da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15361da177e4SLinus Torvalds
15375dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1538a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
15395dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
15405dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
15411da177e4SLinus Torvalds
1542fe69b420SMasahiro YamadaPHONY += help
15431da177e4SLinus Torvaldshelp:
15441da177e4SLinus Torvalds	@echo  'Cleaning targets:'
15455ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
15465cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
15475ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
15485cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
15491da177e4SLinus Torvalds	@echo  ''
15501da177e4SLinus Torvalds	@echo  'Configuration targets:'
15511da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
15521da177e4SLinus Torvalds	@echo  ''
15531da177e4SLinus Torvalds	@echo  'Other generic targets:'
15541da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
15551da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
15561da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
15579cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
15581da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
155940ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1560433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1561433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
156262718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
156362718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1564155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1565c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
15661da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
15671da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1568f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
15693f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
15703f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
15713f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
15722fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
157359df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
15742fb9b1bdSSam Ravnborg	 echo  ''
157531b8cc80SRandy Dunlap	@echo  'Static analysers:'
15761da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1577aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1578ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1579295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
158074425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
15817f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
15826ad7cbc0SNathan Huckleberry	@echo  '  clang-analyzer  - Check with clang static analyzer'
15836ad7cbc0SNathan Huckleberry	@echo  '  clang-tidy      - Check with clang-tidy'
158474425eeeSNicolas Palix	@echo  ''
1585eb8305aeSMatthias Maennich	@echo  'Tools:'
1586eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1587eb8305aeSMatthias Maennich	@echo  ''
158831b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1589e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
15905a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
15915a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1592e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1593e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1594e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1595dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1596e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1597e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
15985a5da78bSShuah Khan	@echo  ''
159937c8a5faSRob Herring	@$(if $(dtstree), \
160037c8a5faSRob Herring		echo 'Devicetree:'; \
160137c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
160237c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
16037aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
16047aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
160537c8a5faSRob Herring		echo '')
160637c8a5faSRob Herring
160731b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
160831b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
160931b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
161031b8cc80SRandy Dunlap	@echo  ''
16111da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1612000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
16131da177e4SLinus Torvalds	@echo  ''
16141da177e4SLinus Torvalds	@echo  'Documentation targets:'
1615cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
16161da177e4SLinus Torvalds	@echo  ''
161701dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
16181da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
161901dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
16201da177e4SLinus Torvalds	@echo  ''
16211da177e4SLinus Torvalds	@$(if $(boards), \
16221da177e4SLinus Torvalds		$(foreach b, $(boards), \
16234234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
16241da177e4SLinus Torvalds		echo '')
16255dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
16265dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
16275dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
16285dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
16295dffbe81SSegher Boessenkool		echo '')
16301da177e4SLinus Torvalds
16311da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
163245d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
16331da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1634a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1635a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1636701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1637af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1638e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
163928bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
164028bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
164128bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1642a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
16431da177e4SLinus Torvalds	@echo  ''
16441da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
16451da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
16461da177e4SLinus Torvalds
16471da177e4SLinus Torvalds
16485dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
16495dffbe81SSegher Boessenkool
16505dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
16515dffbe81SSegher Boessenkool
1652fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
16535dffbe81SSegher Boessenkool
16545dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
16555dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
16565dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
16575dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
16585dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
16595dffbe81SSegher Boessenkool		echo '')
16605dffbe81SSegher Boessenkool
16615dffbe81SSegher Boessenkool
16621da177e4SLinus Torvalds# Documentation targets
16631da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1664e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1665e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
166622cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1667bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1668cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
16691da177e4SLinus Torvalds
167067274c08SMasahiro Yamada# Misc
167167274c08SMasahiro Yamada# ---------------------------------------------------------------------------
167267274c08SMasahiro Yamada
167367274c08SMasahiro YamadaPHONY += scripts_gdb
16747a739ce5SMasahiro Yamadascripts_gdb: prepare0
16751e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
16768d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
167767274c08SMasahiro Yamada
167867274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
167967274c08SMasahiro Yamadaall: scripts_gdb
168067274c08SMasahiro Yamadaendif
168167274c08SMasahiro Yamada
16821da177e4SLinus Torvaldselse # KBUILD_EXTMOD
16831da177e4SLinus Torvalds
16841da177e4SLinus Torvalds###
16851da177e4SLinus Torvalds# External module support.
16861da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
16871da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
16881da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
16891da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
16901da177e4SLinus Torvalds# be used.
16911da177e4SLinus Torvalds#
16921da177e4SLinus Torvalds# The following are the only valid targets when building external
16931da177e4SLinus Torvalds# modules.
16941da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
16951da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
16961da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
16971da177e4SLinus Torvalds# make M=dir modules_install
1698070b98bfSSam Ravnborg#                      Install the modules built in the module directory
16991da177e4SLinus Torvalds#                      Assumes install directory is already created
17001da177e4SLinus Torvalds
17016212804fSMasahiro Yamada# We are always building only modules.
17026212804fSMasahiro YamadaKBUILD_BUILTIN :=
17031da177e4SLinus TorvaldsKBUILD_MODULES := 1
17041da177e4SLinus Torvalds
1705c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1706c99f3918SMasahiro YamadaPHONY += modules
17073d32285fSMasahiro Yamadamodules: $(MODORDER)
1708b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
17091da177e4SLinus Torvalds
17103d32285fSMasahiro Yamada$(MODORDER): descend
17113d32285fSMasahiro Yamada	@:
17123d32285fSMasahiro Yamada
17134f193362SPaul SmithPHONY += modules_install
1714a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1715a67dc21aSSam Ravnborg
1716a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
17174f193362SPaul SmithPHONY += _emodinst_
1718a67dc21aSSam Ravnborg_emodinst_:
1719a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1720b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
17211da177e4SLinus Torvalds
17224f193362SPaul SmithPHONY += _emodinst_post
1723a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1724a67dc21aSSam Ravnborg	$(call cmd,depmod)
1725a67dc21aSSam Ravnborg
17263d32285fSMasahiro Yamadacompile_commands.json: $(extmod-prefix)compile_commands.json
17273d32285fSMasahiro YamadaPHONY += compile_commands.json
17283d32285fSMasahiro Yamada
172976cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
17303d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
17313d32285fSMasahiro Yamada	$(KBUILD_EXTMOD)/compile_commands.json
17321da177e4SLinus Torvalds
1733fe69b420SMasahiro YamadaPHONY += help
17341da177e4SLinus Torvaldshelp:
17351da177e4SLinus Torvalds	@echo  '  Building external modules.'
17361da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
17371da177e4SLinus Torvalds	@echo  ''
17381da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
17391da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
17401da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
17411da177e4SLinus Torvalds	@echo  ''
174206300b21SSam Ravnborg
1743596b0474SMasahiro Yamada# no-op for external module builds
1744596b0474SMasahiro YamadaPHONY += prepare modules_prepare
1745596b0474SMasahiro Yamada
17461da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
17471da177e4SLinus Torvalds
1748b1fbfcb4SMasahiro Yamada# Single targets
1749b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1750b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1751b1fbfcb4SMasahiro Yamada#
1752b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1753b1fbfcb4SMasahiro Yamada#
1754b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1755b1fbfcb4SMasahiro Yamada#
1756b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1757b1fbfcb4SMasahiro Yamada#
1758b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1759b1fbfcb4SMasahiro Yamada
1760b1fbfcb4SMasahiro Yamadaifdef single-build
1761b1fbfcb4SMasahiro Yamada
1762b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1763b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1764b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1765b1fbfcb4SMasahiro Yamada
1766b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1767b1fbfcb4SMasahiro Yamada	@:
1768b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1769b1fbfcb4SMasahiro Yamada	@:
1770b1fbfcb4SMasahiro Yamada
1771b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1772b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1773b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1774b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1775b1fbfcb4SMasahiro Yamadaendif
1776b1fbfcb4SMasahiro Yamada
1777b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1778596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare
1779b1fbfcb4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1780b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1781b1fbfcb4SMasahiro Yamada
1782b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1783b1fbfcb4SMasahiro Yamada
1784b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1785b1fbfcb4SMasahiro Yamada
1786b1fbfcb4SMasahiro Yamada# trim unrelated directories
1787b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1788b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1789b1fbfcb4SMasahiro Yamada
1790b1fbfcb4SMasahiro Yamadaendif
1791b1fbfcb4SMasahiro Yamada
1792b480fec9SMasahiro Yamadaifndef CONFIG_MODULES
1793b480fec9SMasahiro YamadaKBUILD_MODULES :=
1794b480fec9SMasahiro Yamadaendif
1795b480fec9SMasahiro Yamada
1796c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1797c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1798c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1799c99f3918SMasahiro Yamada# make menuconfig etc.
1800c99f3918SMasahiro Yamada# Error messages still appears in the original language
1801c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1802c99f3918SMasahiro Yamadadescend: $(build-dirs)
1803c99f3918SMasahiro Yamada$(build-dirs): prepare
1804b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
180520b1be59SMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
1806b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1807c99f3918SMasahiro Yamada
180876cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
180976cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
181076cd306dSMasahiro Yamada$(clean-dirs):
181176cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
181276cd306dSMasahiro Yamada
181388d7be03SMichal Marekclean: $(clean-dirs)
181488d7be03SMichal Marek	$(call cmd,rmfiles)
181543f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1816ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
18174f0e3a57SRob Herring		-o -name '*.ko.*' \
18184f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1819ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1820bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
182188d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
18229a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
18234fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
182488d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
18258b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
18266b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1827433db3e2SVinícius Tinti		-o -name '*.ll' \
182888d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
182988d7be03SMichal Marek
18301da177e4SLinus Torvalds# Generate tags for editors
18311da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1832a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1833858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
18341da177e4SLinus Torvalds
1835f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
18361da177e4SLinus Torvalds	$(call cmd,tags)
18371da177e4SLinus Torvalds
1838eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1839eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1840eb8305aeSMatthias Maennich
1841eb8305aeSMatthias MaennichPHONY += nsdeps
1842bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1843eb8305aeSMatthias Maennichnsdeps: modules
1844bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1845eb8305aeSMatthias Maennich
18463d32285fSMasahiro Yamada# Clang Tooling
18473d32285fSMasahiro Yamada# ---------------------------------------------------------------------------
18483d32285fSMasahiro Yamada
18493d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN     $@
18503d32285fSMasahiro Yamada      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
18513d32285fSMasahiro Yamada
18526ad7cbc0SNathan Huckleberry$(extmod-prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
18533d32285fSMasahiro Yamada	$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
18543d32285fSMasahiro Yamada	$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
18553d32285fSMasahiro Yamada	$(call if_changed,gen_compile_commands)
18563d32285fSMasahiro Yamada
18573d32285fSMasahiro Yamadatargets += $(extmod-prefix)compile_commands.json
18583d32285fSMasahiro Yamada
18596ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer
18606ad7cbc0SNathan Huckleberry
18616ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG
18626ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK   $<
18636ad7cbc0SNathan Huckleberry      cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
18646ad7cbc0SNathan Huckleberry
18656ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer: $(extmod-prefix)compile_commands.json
18666ad7cbc0SNathan Huckleberry	$(call cmd,clang_tools)
18676ad7cbc0SNathan Huckleberryelse
18686ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer:
18696ad7cbc0SNathan Huckleberry	@echo "$@ requires CC=clang" >&2
18706ad7cbc0SNathan Huckleberry	@false
18716ad7cbc0SNathan Huckleberryendif
18726ad7cbc0SNathan Huckleberry
18731da177e4SLinus Torvalds# Scripts to check various things for consistency
18741da177e4SLinus Torvalds# ---------------------------------------------------------------------------
18751da177e4SLinus Torvalds
18767dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report
1877279f3dd3SPeter Foley
18781da177e4SLinus Torvaldsincludecheck:
1879436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
18801da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
188180007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
18821da177e4SLinus Torvalds
18831da177e4SLinus Torvaldsversioncheck:
18842ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
18851da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
188680007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
18871da177e4SLinus Torvalds
188874425eeeSNicolas Palixcoccicheck:
1889858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
189074425eeeSNicolas Palix
1891295ac051SAdrian Bunkexport_report:
1892295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1893295ac051SAdrian Bunk
1894c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1895e3ccf6e3SJeff Dike
1896011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1897011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1898011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1899011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1900011e3a9aSJeff Dikeifeq ($(ARCH), um)
1901011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1902011e3a9aSJeff Dikeelse
1903011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1904011e3a9aSJeff Dikeendif
19051da177e4SLinus Torvaldscheckstack:
19061da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
190775dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
19081da177e4SLinus Torvalds
19097b8ea53dSAmerigo Wangkernelrelease:
19107b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
191101ab1788SAmerigo Wang
1912cb58455cSSam Ravnborgkernelversion:
19132244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
19141da177e4SLinus Torvalds
1915c398ff00SMike Marciniszynimage_name:
1916c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1917c398ff00SMike Marciniszyn
1918ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1919f47a23ceSMasahiro Yamada
1920f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1921f47a23ceSMasahiro Yamadatools_silent=s
1922f47a23ceSMasahiro Yamadaendif
1923f47a23ceSMasahiro Yamada
1924ea01fa9fSBorislav Petkovtools/: FORCE
1925bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
192675dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1927ea01fa9fSBorislav Petkov
1928ea01fa9fSBorislav Petkovtools/%: FORCE
1929bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
193075dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1931ea01fa9fSBorislav Petkov
19321da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
19330663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
19341da177e4SLinus Torvalds
1935bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
193650a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1937569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
19385a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
193950a8ec31SSam Ravnborg
1940392885eeSMasahiro Yamada# read saved command lines for existing targets
1941392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
19421da177e4SLinus Torvalds
1943b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
19441da177e4SLinus Torvalds
194546b7c492SSZ Lin (林上智)endif # config-build
19462042b548SMasahiro Yamadaendif # mixed-build
1947688931a5SMasahiro Yamadaendif # need-sub-make
19481da177e4SLinus Torvalds
19494f193362SPaul SmithPHONY += FORCE
19501da177e4SLinus TorvaldsFORCE:
19514f193362SPaul Smith
1952bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1953fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
19544f193362SPaul Smith.PHONY: $(PHONY)
1955