xref: /openbmc/linux/Makefile (revision 961ab4a3cd66c285951cf4c8ec10bc8d9a4b0232)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
3fe07bfdaSLinus TorvaldsPATCHLEVEL = 12
455922c9dSLinus TorvaldsSUBLEVEL = 0
51e28eed1SLinus TorvaldsEXTRAVERSION = -rc3
6fe07bfdaSLinus TorvaldsNAME = Frozen Wasteland
71da177e4SLinus Torvalds
81da177e4SLinus Torvalds# *DOCUMENTATION*
91da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
101da177e4SLinus Torvalds# More info can be located in ./README
111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
131da177e4SLinus Torvalds
14121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \
15121c2a13SMasahiro Yamada	$(error targets prefixed with '__' are only for internal use))
16121c2a13SMasahiro Yamada
17ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
18121c2a13SMasahiro YamadaPHONY := __all
19121c2a13SMasahiro Yamada__all:
20ba634eceSMasahiro Yamada
211da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
221da177e4SLinus Torvalds# to get the ordering right.
231da177e4SLinus Torvalds#
241da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
251da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
261da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
27f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
281da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
291da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
301da177e4SLinus Torvalds# is now up to date.
311da177e4SLinus Torvalds#
321da177e4SLinus Torvalds# The only cases where we need to modify files which have global
331da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
341da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
351da177e4SLinus Torvalds# prepare rule.
361da177e4SLinus Torvalds
37221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
383812b8c5SMasahiro Yamada
393812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
403812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
413812b8c5SMasahiro YamadaMAKEFLAGS += -rR
423812b8c5SMasahiro Yamada
433812b8c5SMasahiro Yamada# Avoid funny character set dependencies
443812b8c5SMasahiro Yamadaunexport LC_ALL
453812b8c5SMasahiro YamadaLC_COLLATE=C
463812b8c5SMasahiro YamadaLC_NUMERIC=C
473812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
483812b8c5SMasahiro Yamada
493812b8c5SMasahiro Yamada# Avoid interference with shell env settings
503812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
513812b8c5SMasahiro Yamada
52066b7ed9SMichal Marek# Beautify output
53066b7ed9SMichal Marek# ---------------------------------------------------------------------------
54066b7ed9SMichal Marek#
55066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
56066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
57066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
58066b7ed9SMichal Marek#
59066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
60066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
61066b7ed9SMichal Marek#
62066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
63066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
64066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
65066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
66066b7ed9SMichal Marek#
67066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
68066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
69066b7ed9SMichal Marek#
70066b7ed9SMichal Marek#	$(Q)ln $@ :<
71066b7ed9SMichal Marek#
72066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
73066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
74505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
75066b7ed9SMichal Marek#
761da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
771da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
781da177e4SLinus Torvalds
791da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
801da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
811da177e4SLinus Torvaldsendif
821da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
831da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
841da177e4SLinus Torvaldsendif
851da177e4SLinus Torvalds
86066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
87066b7ed9SMichal Marek  quiet =
88066b7ed9SMichal Marek  Q =
89066b7ed9SMichal Marekelse
90066b7ed9SMichal Marek  quiet=quiet_
91066b7ed9SMichal Marek  Q = @
92066b7ed9SMichal Marekendif
93066b7ed9SMichal Marek
94066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
95066b7ed9SMichal Marek# commands
96066b7ed9SMichal Marek
976f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
98066b7ed9SMichal Marek  quiet=silent_
9922149454SMasahiro Yamada  KBUILD_VERBOSE = 0
100066b7ed9SMichal Marekendif
101066b7ed9SMichal Marek
102066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
103066b7ed9SMichal Marek
104bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
105bcf637f5SMasahiro Yamada# C compilation.
106bcf637f5SMasahiro Yamada#
107bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
108bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
109bcf637f5SMasahiro Yamada# of whether they are re-compiled or not.
110bcf637f5SMasahiro Yamada#
111bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details,
112bcf637f5SMasahiro Yamada# including where to get the "sparse" utility.
113bcf637f5SMasahiro Yamada
114bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line")
115bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
116bcf637f5SMasahiro Yamadaendif
117bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC
118bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = 0
119bcf637f5SMasahiro Yamadaendif
120bcf637f5SMasahiro Yamada
121bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC
122bcf637f5SMasahiro Yamada
123bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
124bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
125bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line")
126bcf637f5SMasahiro Yamada  KBUILD_EXTMOD := $(M)
127bcf637f5SMasahiro Yamadaendif
128bcf637f5SMasahiro Yamada
129bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \
130bcf637f5SMasahiro Yamada	$(error building multiple external modules is not supported))
131bcf637f5SMasahiro Yamada
132bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD
133bcf637f5SMasahiro Yamada
13425b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
13525b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
13625b146c5SMasahiro Yamada#
13725b146c5SMasahiro Yamada# For example, you can do this:
13825b146c5SMasahiro Yamada#
13925b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
14025b146c5SMasahiro Yamada#
14125b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
14225b146c5SMasahiro Yamada# two syntaxes to specify it.
14325b146c5SMasahiro Yamada#
1441da177e4SLinus Torvalds# 1) O=
1451da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1461da177e4SLinus Torvalds#
1471da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
14825b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
14925b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1501da177e4SLinus Torvalds#
1511da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1521da177e4SLinus Torvalds# variable.
1531da177e4SLinus Torvalds
15425b146c5SMasahiro Yamada# Do we want to change the working directory?
1551da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1561da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1571da177e4SLinus Torvaldsendif
1581da177e4SLinus Torvalds
15925b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
16025b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
16125b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
16225b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
16325b146c5SMasahiro Yamada$(if $(abs_objtree),, \
16425b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
16525b146c5SMasahiro Yamada
16625b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
16725b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
16825b146c5SMasahiro Yamadaelse
16925b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
17025b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
17125b146c5SMasahiro Yamada
17225b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
17325b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
17425b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
17525b146c5SMasahiro Yamadaelse
17625b146c5SMasahiro Yamadaneed-sub-make := 1
17751193b76SRobert Jarzmikendif
17851193b76SRobert Jarzmik
17930cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST))
18030cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile)))
1811da177e4SLinus Torvalds
18225b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
18325b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
18425b146c5SMasahiro Yamadaendif
18525b146c5SMasahiro Yamada
18625b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
18780463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
18880463f1bSMasahiro Yamada#
18980463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
19025b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
19125b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
192688931a5SMasahiro Yamadaneed-sub-make := 1
19325b146c5SMasahiro Yamadaendif
1943812b8c5SMasahiro Yamada
195688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
196688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
197688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
198688931a5SMasahiro Yamadaneed-sub-make := 1
199688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
20093fdddfeSMasahiro Yamada$(this-makefile): ;
201688931a5SMasahiro Yamadaendif
202688931a5SMasahiro Yamada
20325b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
204221cc2d2SMasahiro Yamadaexport sub_make_done := 1
205221cc2d2SMasahiro Yamada
206688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
207688931a5SMasahiro Yamada
208121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make
2090b35786dSMilton Miller
210121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
21116f89098SCharles Keepax	@:
2120b35786dSMilton Miller
213c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
214121c2a13SMasahiro Yamada__sub-make:
21525b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
2161da177e4SLinus Torvalds
217688931a5SMasahiro Yamadaendif # need-sub-make
218221cc2d2SMasahiro Yamadaendif # sub_make_done
219688931a5SMasahiro Yamada
2201da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
221688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
2221da177e4SLinus Torvalds
2237ff52571SMasahiro Yamada# Do not print "Entering directory ...",
2247ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
2257ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
2267ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
2277ff52571SMasahiro 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 Yamada
26122340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
26222340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2632c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
26459b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
2654623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
2664623980dSDavid Engraf			 outputmakefile
267805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install
268805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed.
269805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \
270805b2e1dSMasahiro Yamada			headers_install modules_install kernelrelease image_name
271993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
272993bdde9SMasahiro Yamada			  image_name
273394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
2742c1f4f12SMasahiro Yamada
2752042b548SMasahiro Yamadaconfig-build	:=
2762042b548SMasahiro Yamadamixed-build	:=
2772042b548SMasahiro Yamadaneed-config	:= 1
278805b2e1dSMasahiro Yamadaneed-compiler	:= 1
279d7942413SMasahiro Yamadamay-sync-config	:= 1
280394053f4SMasahiro Yamadasingle-build	:=
2812c1f4f12SMasahiro Yamada
2822c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2832c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2842042b548SMasahiro Yamada		need-config :=
2852c1f4f12SMasahiro Yamada	endif
2862c1f4f12SMasahiro Yamadaendif
2872c1f4f12SMasahiro Yamada
288805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
289805b2e1dSMasahiro Yamada	ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
290805b2e1dSMasahiro Yamada		need-compiler :=
291805b2e1dSMasahiro Yamada	endif
292805b2e1dSMasahiro Yamadaendif
293805b2e1dSMasahiro Yamada
294d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
295d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
2962042b548SMasahiro Yamada		may-sync-config :=
297d7942413SMasahiro Yamada	endif
298d7942413SMasahiro Yamadaendif
299d7942413SMasahiro Yamada
300d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
3012042b548SMasahiro Yamada	may-sync-config :=
302d7942413SMasahiro Yamadaendif
303d7942413SMasahiro Yamada
3042c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
305efbf9726SMasahiro Yamada        ifneq ($(filter %config,$(MAKECMDGOALS)),)
3062042b548SMasahiro Yamada		config-build := 1
3072c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
3082042b548SMasahiro Yamada			mixed-build := 1
3092c1f4f12SMasahiro Yamada                endif
3102c1f4f12SMasahiro Yamada        endif
3112c1f4f12SMasahiro Yamadaendif
31222340a06SMasahiro Yamada
313394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
314394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
315394053f4SMasahiro Yamada	single-build := 1
316394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
317394053f4SMasahiro Yamada		mixed-build := 1
318394053f4SMasahiro Yamada	endif
319394053f4SMasahiro Yamadaendif
320394053f4SMasahiro Yamada
32122340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
32222340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
32322340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3242042b548SMasahiro Yamada		mixed-build := 1
32522340a06SMasahiro Yamada        endif
32622340a06SMasahiro Yamadaendif
32722340a06SMasahiro Yamada
3282c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3292c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3302c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3312042b548SMasahiro Yamada		mixed-build := 1
3322c1f4f12SMasahiro Yamada        endif
3332c1f4f12SMasahiro Yamadaendif
3342c1f4f12SMasahiro Yamada
3352042b548SMasahiro Yamadaifdef mixed-build
3362c1f4f12SMasahiro Yamada# ===========================================================================
3372c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3382c1f4f12SMasahiro Yamada# Handle them one by one.
3392c1f4f12SMasahiro Yamada
3402c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3412c1f4f12SMasahiro Yamada
342121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one
3432c1f4f12SMasahiro Yamada	@:
3442c1f4f12SMasahiro Yamada
3452c1f4f12SMasahiro Yamada__build_one_by_one:
3462c1f4f12SMasahiro Yamada	$(Q)set -e; \
3472c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3482c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3492c1f4f12SMasahiro Yamada	done
3502c1f4f12SMasahiro Yamada
3512042b548SMasahiro Yamadaelse # !mixed-build
3522c1f4f12SMasahiro Yamada
3533204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include
3542c1f4f12SMasahiro Yamada
3552c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3562c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3572c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3582c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3592c1f4f12SMasahiro Yamada
3603204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include
3611da177e4SLinus Torvalds
3621da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3631da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3641da177e4SLinus Torvalds#
3651da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3661da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3671da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3681da177e4SLinus Torvalds# make ARCH=ia64
3691da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3701da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3711da177e4SLinus Torvalds
3721da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3731da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3741da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3751da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3761da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3771da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3781da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3791da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3802331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3811da177e4SLinus Torvalds
3821da177e4SLinus Torvalds# Architecture as present in compile.h
3831da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3846752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3851da177e4SLinus Torvalds
386d746d647SSam Ravnborg# Additional ARCH settings for x86
387d746d647SSam Ravnborgifeq ($(ARCH),i386)
388d746d647SSam Ravnborg        SRCARCH := x86
389d746d647SSam Ravnborgendif
390d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
391d746d647SSam Ravnborg        SRCARCH := x86
392d746d647SSam Ravnborgendif
39374b469f2SSam Ravnborg
3945e538790SSam Ravnborg# Additional ARCH settings for sparc
395e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
396e69f58c0SNamhyung Kim       SRCARCH := sparc
397e69f58c0SNamhyung Kimendif
398a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
3995e538790SSam Ravnborg       SRCARCH := sparc
400a439fe51SSam Ravnborgendif
4012fb9b1bdSSam Ravnborg
4023cc000b5SPaul Mundt# Additional ARCH settings for sh
4033cc000b5SPaul Mundtifeq ($(ARCH),sh64)
4043cc000b5SPaul Mundt       SRCARCH := sh
4053cc000b5SPaul Mundtendif
4063cc000b5SPaul Mundt
40714cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
40841263fc6SBen Gardinerexport KCONFIG_CONFIG
40914cdd3c4SRoman Zippel
4102a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
4112a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig
4122a86f661SMasahiro Yamada
4131da177e4SLinus Torvalds# SHELL used by kbuild
414858805b3SMasahiro YamadaCONFIG_SHELL := sh
4151da177e4SLinus Torvalds
4166d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
4176d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4186d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
419d7f14c66SUwe Kleine-König
420a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
421a0d1c951SMasahiro YamadaHOSTCC	= clang
422a0d1c951SMasahiro YamadaHOSTCXX	= clang++
423a0d1c951SMasahiro Yamadaelse
4241da177e4SLinus TorvaldsHOSTCC	= gcc
4251da177e4SLinus TorvaldsHOSTCXX	= g++
426a0d1c951SMasahiro Yamadaendif
4277f3a59dbSMasahiro Yamada
4287f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
4297f3a59dbSMasahiro Yamada			      -O2 -fomit-frame-pointer -std=gnu89
4307f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS :=
4317f3a59dbSMasahiro Yamada
4327f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS   := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
433735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
434f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
435f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4361da177e4SLinus Torvalds
4371da177e4SLinus Torvalds# Make variables (CC, etc...)
4381da177e4SLinus TorvaldsCPP		= $(CC) -E
439a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
440a0d1c951SMasahiro YamadaCC		= clang
441a0d1c951SMasahiro YamadaLD		= ld.lld
442a0d1c951SMasahiro YamadaAR		= llvm-ar
443a0d1c951SMasahiro YamadaNM		= llvm-nm
444a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
445a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
446a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
447a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
448a0d1c951SMasahiro Yamadaelse
449a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
450a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
4511da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4521da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4531da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4541da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
455eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
456a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
457a0d1c951SMasahiro Yamadaendif
458e83b9f55SAndrii NakryikoPAHOLE		= pahole
459c9a0f3b8SJiri OlsaRESOLVE_BTFIDS	= $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
46073a4f6dbSMasahiro YamadaLEX		= flex
46173a4f6dbSMasahiro YamadaYACC		= bison
4621da177e4SLinus TorvaldsAWK		= awk
463caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
464436e980eSDominique MartinetDEPMOD		= depmod
4651da177e4SLinus TorvaldsPERL		= perl
466e9781b52SMasahiro YamadaPYTHON3		= python3
4671da177e4SLinus TorvaldsCHECK		= sparse
468858805b3SMasahiro YamadaBASH		= bash
469e4a42c82SDenis EfremovKGZIP		= gzip
470e4a42c82SDenis EfremovKBZIP2		= bzip2
471e4a42c82SDenis EfremovKLZOP		= lzop
4728dfb61dcSDenis EfremovLZMA		= lzma
4738dfb61dcSDenis EfremovLZ4		= lz4c
4748dfb61dcSDenis EfremovXZ		= xz
47548f7ddf7SNick TerrellZSTD		= zstd
4768dfb61dcSDenis Efremov
47780a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4786c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4790c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4806588169dSSam RavnborgCFLAGS_MODULE   =
4816588169dSSam RavnborgAFLAGS_MODULE   =
4826588169dSSam RavnborgLDFLAGS_MODULE  =
4831da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4841da177e4SLinus TorvaldsAFLAGS_KERNEL	=
485b36fad65SMichal MarekLDFLAGS_vmlinux =
4861da177e4SLinus Torvalds
487abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
488abbf1590SDavid HowellsUSERINCLUDE    := \
4899d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4909d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
491abbf1590SDavid Howells		-I$(srctree)/include/uapi \
4923308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
493ce6ed1c4SMasahiro Yamada                -include $(srctree)/include/linux/compiler-version.h \
494abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
495abbf1590SDavid Howells
4961da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
4971da177e4SLinus Torvalds# Needed to be compatible with the O= option
498abbf1590SDavid HowellsLINUXINCLUDE    := \
4999d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
5009d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
501051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
502f8224f7fSMasahiro Yamada		-I$(objtree)/include \
503f8224f7fSMasahiro Yamada		$(USERINCLUDE)
5041da177e4SLinus Torvalds
50542a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
506eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
50742a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
508b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
509172aad81SOlaf Hering		   -Werror=return-type -Wno-format-security \
510433dc2ebSMasahiro Yamada		   -std=gnu89
511433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
51280c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
51380c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
5146588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
5156588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
51610df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
517d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
5185241ab4cSMasahiro YamadaCLANG_FLAGS :=
5191da177e4SLinus Torvalds
520aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
521d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
522d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
52348f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
5247bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
5251da177e4SLinus Torvalds
526d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
5270e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
528222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
5296588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
53080c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
5311da177e4SLinus Torvalds
5321da177e4SLinus Torvalds# Files to ignore in find ... statements
5331da177e4SLinus Torvalds
534ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
535ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
536ae63b2d7SPrarit Bhargava			  -prune -o
537450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
538450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
5391da177e4SLinus Torvalds
5401da177e4SLinus Torvalds# ===========================================================================
5411da177e4SLinus Torvalds# Rules shared between *config targets and build targets
5421da177e4SLinus Torvalds
543312a3d09SCao jin# Basic helpers built in scripts/basic/
5444f193362SPaul SmithPHONY += scripts_basic
5451da177e4SLinus Torvaldsscripts_basic:
5461da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
547638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
5481da177e4SLinus Torvalds
5494f193362SPaul SmithPHONY += outputmakefile
550e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
551fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
552fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
553fd5f0cd6SJan Beulich# output directory.
5543a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5553a51ff34SVladimir Kondratiev# ignore whole output directory
5561da177e4SLinus Torvaldsoutputmakefile:
557051f278eSMasahiro Yamadaifdef building_out_of_srctree
558e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
559e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
560e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
561e8e83a23SMasahiro Yamada		echo >&2 "***"; \
562e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
563e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
564e8e83a23SMasahiro Yamada		echo >&2 "***"; \
565e8e83a23SMasahiro Yamada		false; \
566e8e83a23SMasahiro Yamada	fi
56792979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5684fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
569156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
570156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
571fd5f0cd6SJan Beulichendif
5721da177e4SLinus Torvalds
573db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
574db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
575db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
576db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade.
5776e0839fdSMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell $(CC) --version 2>/dev/null | head -n 1))
578db07562aSNick Desaulniers
579db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
580ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
5815241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
582ae6b289aSChris Friesendif
583ba64beb1SMasahiro Yamadaifeq ($(LLVM_IAS),1)
584ba64beb1SMasahiro YamadaCLANG_FLAGS	+= -integrated-as
585ba64beb1SMasahiro Yamadaelse
586238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
587eec08090SNathan ChancellorGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
588eec08090SNathan ChancellorCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
589876a0600SNathan Chancellorendif
590589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
591238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
592238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
5933bd98050SJoel Stanleyexport CLANG_FLAGS
594ae6b289aSChris Friesendif
595ae6b289aSChris Fries
59657fd251cSMasahiro Yamada# Include this also for config targets because some architectures need
59757fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE.
598805b2e1dSMasahiro Yamadaifdef need-compiler
59957fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler
600805b2e1dSMasahiro Yamadaendif
60157fd251cSMasahiro Yamada
6022042b548SMasahiro Yamadaifdef config-build
6031da177e4SLinus Torvalds# ===========================================================================
6041da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
6051da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
6061da177e4SLinus Torvalds
6071da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
6081da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
6091da177e4SLinus Torvalds# used for 'make defconfig'
6103204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
611315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
6121da177e4SLinus Torvalds
61336de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
61431110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
61531110ebbSSam Ravnborg
61636de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
6171da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
6181da177e4SLinus Torvalds
6192042b548SMasahiro Yamadaelse #!config-build
6201da177e4SLinus Torvalds# ===========================================================================
6211da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
6221da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
6231da177e4SLinus Torvalds
6242c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
625121c2a13SMasahiro Yamada# but instead __all depend on modules
6262c1f4f12SMasahiro YamadaPHONY += all
6272c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
628121c2a13SMasahiro Yamada__all: all
6292c1f4f12SMasahiro Yamadaelse
630121c2a13SMasahiro Yamada__all: modules
6312c1f4f12SMasahiro Yamadaendif
6322c1f4f12SMasahiro Yamada
6332c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
6342c1f4f12SMasahiro Yamada# Normally, just do built-in.
6352c1f4f12SMasahiro Yamada
6362c1f4f12SMasahiro YamadaKBUILD_MODULES :=
6372c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
6382c1f4f12SMasahiro Yamada
6392c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
6402c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
6414b50c8c4SMasahiro Yamada  KBUILD_BUILTIN :=
6422c1f4f12SMasahiro Yamadaendif
6432c1f4f12SMasahiro Yamada
6442c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
6452c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
6462c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
6472c1f4f12SMasahiro Yamada
6486ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
6492c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6502c1f4f12SMasahiro Yamadaendif
6512c1f4f12SMasahiro Yamada
6522c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6532c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6542c1f4f12SMasahiro Yamadaendif
6552c1f4f12SMasahiro Yamada
6562c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6572c1f4f12SMasahiro Yamada
6582042b548SMasahiro Yamadaifdef need-config
659d93a18f2SMasahiro Yamadainclude include/config/auto.conf
660d93a18f2SMasahiro Yamadaendif
661d93a18f2SMasahiro Yamada
6621da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6631da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
66423febe37SMasahiro Yamadacore-y		:= init/ usr/
665f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
666d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
6678b5f4eb3SMasahiro Yamadadrivers-$(CONFIG_NET) += net/
6688b5f4eb3SMasahiro Yamadadrivers-y	+= virt/
6691da177e4SLinus Torvaldslibs-y		:= lib/
6701da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6711da177e4SLinus Torvalds
672315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
673315bab4eSMasahiro Yamada# command line.
674315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
675315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
676315bab4eSMasahiro Yamadaall: vmlinux
677315bab4eSMasahiro Yamada
678315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
679315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
680315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
6815aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
682315bab4eSMasahiro Yamada
683b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
684b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
685b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
686b1f4ff74SPaulo Zanoniendif
687b1f4ff74SPaulo Zanoni
688669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
689669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
690669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
691669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
692669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
693669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
694669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
695669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
696669e06b1SMasahiro Yamada
6973204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
698315bab4eSMasahiro Yamada
6992042b548SMasahiro Yamadaifdef need-config
7002042b548SMasahiro Yamadaifdef may-sync-config
701315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
702315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
703315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
704d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
7051da177e4SLinus Torvalds
70605850719SMasahiro Yamada$(KCONFIG_CONFIG):
70705850719SMasahiro Yamada	@echo >&2 '***'
70805850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
70905850719SMasahiro Yamada	@echo >&2 '***'
71005850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
71105850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
71205850719SMasahiro Yamada	@echo >&2 '***'
71305850719SMasahiro Yamada	@/bin/false
7141da177e4SLinus Torvalds
71561277981SUlf Magnusson# The actual configuration files used during the build are stored in
71661277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
71761277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
7189390dff6SMasahiro Yamada#
7199390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
7209390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
721f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
72223cd88c9SMasahiro Yamadaquiet_cmd_syncconfig = SYNC    $@
72323cd88c9SMasahiro Yamada      cmd_syncconfig = $(MAKE) -f $(srctree)/Makefile syncconfig
72423cd88c9SMasahiro Yamada
7253044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
72623cd88c9SMasahiro Yamada	+$(call cmd,syncconfig)
7272042b548SMasahiro Yamadaelse # !may-sync-config
728d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
729d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
730d7942413SMasahiro Yamada# Use auto.conf to trigger the test
7319ee4e336SSam RavnborgPHONY += include/config/auto.conf
7329ee4e336SSam Ravnborg
7339ee4e336SSam Ravnborginclude/config/auto.conf:
734264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
7355369f550SMichal Marek	echo >&2;							\
7365369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
7375369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
7385369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
7395369f550SMichal Marek	echo >&2 ;							\
7409ee4e336SSam Ravnborg	/bin/false)
7419ee4e336SSam Ravnborg
742d7942413SMasahiro Yamadaendif # may-sync-config
7432042b548SMasahiro Yamadaendif # need-config
7441da177e4SLinus Torvalds
745a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
746ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
747bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
748bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7496f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
750a1c48bb1SGeert Uytterhoeven
75115f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
752a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
75315f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
75415f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
75515f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
75615f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
7571da177e4SLinus Torvaldsendif
7581da177e4SLinus Torvalds
75969102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
76069102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
761b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
76269102311SJiri Kosina
7631873e870SAndi Kleenifdef CONFIG_READABLE_ASM
7641873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
7651873e870SAndi Kleen# reorder blocks reorders the control in the function
7661873e870SAndi Kleen# ipa clone creates specialized cloned functions
7671873e870SAndi Kleen# partial inlining inlines only parts of functions
7681873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
7691873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
7701873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
7711873e870SAndi Kleenendif
7721873e870SAndi Kleen
77308f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
774a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
77535bb5b1eSAndi Kleenendif
77635bb5b1eSAndi Kleen
777893ab004SMasahiro Yamadastackp-flags-y                                    := -fno-stack-protector
778050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
779050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
7802a61f474SMasahiro Yamada
7812a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
782e06b8b98SSam Ravnborg
783076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
784a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
785a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
786a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
787cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
788cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
789cfe17c9bSMasahiro Yamada# See modpost pattern 2
790a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
791cfe17c9bSMasahiro Yamadaelse
792cfe17c9bSMasahiro Yamada
793cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
794cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
7959df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
796e2079e93SNathan Chancellor
797e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
798e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
799e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
800e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
801cfe17c9bSMasahiro Yamadaendif
802cfe17c9bSMasahiro Yamada
8030a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
8041da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
805a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
8061da177e4SLinus Torvaldselse
8077e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
8087e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
8097e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
8107e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
8117e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
8127e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
813a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
8141da177e4SLinus Torvaldsendif
8157e9501fdSRabin Vincentendif
8161da177e4SLinus Torvalds
817f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern.
818f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN
819709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
820709a972eSKees Cookendif
821709a972eSKees Cook
822f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value.
823f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO
824f0fe00d4Sglider@google.com# Future support for zero initialization is still being debated, see
825f0fe00d4Sglider@google.com# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
826f0fe00d4Sglider@google.com# renamed or dropped.
827f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
828f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
829f0fe00d4Sglider@google.comendif
830f0fe00d4Sglider@google.com
831315da87cSMasahiro YamadaDEBUG_CFLAGS	:=
832315da87cSMasahiro Yamada
833121c5d08SMark Wielaard# Workaround for GCC versions < 5.0
834121c5d08SMark Wielaard# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
835121c5d08SMark Wielaardifdef CONFIG_CC_IS_GCC
836315da87cSMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
837121c5d08SMark Wielaardendif
8382062afb4SLinus Torvalds
8391da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
840695afd3dSSedat Dilek
841866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
8429d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
843866ced95SAndi Kleenelse
8441e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
845866ced95SAndi Kleenendif
846695afd3dSSedat Dilek
847b8a90923SNick Desaulniersifneq ($(LLVM_IAS),1)
8482288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
849b8a90923SNick Desaulniersendif
850695afd3dSSedat Dilek
851a66049e2SNick Desaulniersifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
852a66049e2SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
85398cd6f52SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
854a66049e2SNick DesaulniersDEBUG_CFLAGS	+= -gdwarf-$(dwarf-version-y)
855bfaf2dd3SAndi Kleenendif
8561da177e4SLinus Torvalds
857d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
8581e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
859e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
860d6f4ceb7SAndi Kleenendif
861d6f4ceb7SAndi Kleen
86210e68b02SNick Desaulniersifdef CONFIG_DEBUG_INFO_COMPRESSED
86310e68b02SNick DesaulniersDEBUG_CFLAGS	+= -gz=zlib
8647b169944SArvind SankarKBUILD_AFLAGS	+= -gz=zlib
86510e68b02SNick DesaulniersKBUILD_LDFLAGS	+= --compress-debug-sections=zlib
86610e68b02SNick Desaulniersendif
86710e68b02SNick Desaulniers
868695afd3dSSedat Dilekendif # CONFIG_DEBUG_INFO
869695afd3dSSedat Dilek
8701e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
8711e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
8721e88e415SMasahiro Yamada
873606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
8743b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC
87507d04081SVasily Gorbik  CC_FLAGS_FTRACE	+= -mrecord-mcount
8762f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8772f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8782f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8792f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8802f4df001SVasily Gorbik    endif
8812f4df001SVasily Gorbik  endif
88207d04081SVasily Gorbikendif
88322c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
88422c8542dSSami Tolvanen  CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
88522c8542dSSami Tolvanenendif
8863b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
8873b15cdc1SSami Tolvanen  ifdef CONFIG_HAVE_C_RECORDMCOUNT
8883b15cdc1SSami Tolvanen    BUILD_C_RECORDMCOUNT := y
8893b15cdc1SSami Tolvanen    export BUILD_C_RECORDMCOUNT
8903b15cdc1SSami Tolvanen  endif
8913b15cdc1SSami Tolvanenendif
892a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
893f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
894f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
895f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
896a2546faeSSteven Rostedt  endif
897f28bc3c3SVasily Gorbikendif
898f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
899f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
900f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
90116444a8aSArnaldo Carvalho de Meloendif
90216444a8aSArnaldo Carvalho de Melo
90391341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
90491341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
90591341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
90691341d4bSSam Ravnborgendif
90791341d4bSSam Ravnborg
90890ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
909e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
910e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
91190ad4052SMasahiro Yamadaendif
91290ad4052SMasahiro Yamada
913d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK
914d08b9f0cSSami TolvanenCC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
915d08b9f0cSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
916d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS
917d08b9f0cSSami Tolvanenendif
918d08b9f0cSSami Tolvanen
919dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG
920dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN
9212b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto=thin -fsplit-lto-unit
9227f69180bSMasahiro YamadaKBUILD_LDFLAGS	+= --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
923dc5723b0SSami Tolvanenelse
9242b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto
925dc5723b0SSami Tolvanenendif
926dc5723b0SSami TolvanenCC_FLAGS_LTO	+= -fvisibility=hidden
92722d429e7SSami Tolvanen
92822d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size
92922d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5
930dc5723b0SSami Tolvanenendif
931dc5723b0SSami Tolvanen
932dc5723b0SSami Tolvanenifdef CONFIG_LTO
9335e95325fSSami TolvanenKBUILD_CFLAGS	+= -fno-lto $(CC_FLAGS_LTO)
9345e95325fSSami TolvanenKBUILD_AFLAGS	+= -fno-lto
935dc5723b0SSami Tolvanenexport CC_FLAGS_LTO
936dc5723b0SSami Tolvanenendif
937dc5723b0SSami Tolvanen
93809c60546SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B
93909c60546SFeng TangKBUILD_CFLAGS += -falign-functions=32
94009c60546SFeng Tangendif
94109c60546SFeng Tang
942e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
943e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
944e8e69931SSam Ravnborg
9451da177e4SLinus Torvalds# warn about C99 declaration after statement
946a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
9471da177e4SLinus Torvalds
9480bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
9498289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
9500bb95f80SKees Cook
951070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
952fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
9531da177e4SLinus Torvalds
954217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
955217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
956217c3e01SStephen Rothwell
9575c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
9585c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
95944720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
9605a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
9615c45de21SLinus Torvalds
962adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
963adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
964adc71920SLinus Torvalds
96578a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
96678a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
96778a5255fSLinus Torvalds
968fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
9698b42cf2fSMasahiro YamadaKBUILD_CFLAGS	+= -fno-strict-overflow
970d0115552SLinus Torvalds
9713ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
9727d4eb0d8SMasahiro YamadaKBUILD_CFLAGS  += -fno-stack-check
9733ce120b1SLinus Torvalds
9748f7f5c9fSAndi Kleen# conserve stack if available
9758f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
9768f7f5c9fSAndi Kleen
977fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
97887de84c9SMasahiro YamadaKBUILD_CFLAGS   += -Werror=date-time
979fe7c36c7SJosh Triplett
980ea8daa7bSDaniel Wagner# enforce correct pointer usage
981ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
982ea8daa7bSDaniel Wagner
983c834f0e8SKees Cook# Require designated initializers for all marked structures
984c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
985c834f0e8SKees Cook
986a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
987a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
988a73619a8SMasahiro Yamada
989e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed
990e0fe0bbeSMasahiro Yamadainclude-y			:= scripts/Makefile.extrawarn
991e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
992e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
993e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN)		+= scripts/Makefile.ubsan
994e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV)		+= scripts/Makefile.kcov
995e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS)	+= scripts/Makefile.gcc-plugins
996e0fe0bbeSMasahiro Yamada
997e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y))
998a86fe353SMasahiro Yamada
999132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last.
1000132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel
1001132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point.
1002bf5438fcSJason Baron
10038cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
10048cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
10058cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
10068cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
100752bcc330SSam Ravnborg
1008a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1
1009a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1
101018991197SRoland McGrath
10115d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1012d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
10135d7d18f5SDavid Howellsendif
10145d7d18f5SDavid Howells
10155cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
10165cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
10175cf896fbSPeter Collingbourneendif
10185cf896fbSPeter Collingbourne
101959612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the
102059612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script.
102159612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN
102259612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn
102359612b24SNathan Chancellorendif
102459612b24SNathan Chancellor
10257f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
10267f58b487SMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10277f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10287f3a59dbSMasahiro Yamada
102980591e61SLuc Van Oostenryck# make the checker run with the right architecture
103080591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
103180591e61SLuc Van Oostenryck
103214516765SLuc Van Oostenryck# insure the checker run with the right endianness
103314516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
103414516765SLuc Van Oostenryck
10351f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
10361f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
10371f2f01b1SLuc Van Oostenryck
10381da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
10391da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
10401da177e4SLinus Torvalds# set in the environment
10411da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
10421da177e4SLinus Torvalds# this default value
10431da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
10441da177e4SLinus Torvalds
10451da177e4SLinus Torvalds#
10461da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
10471da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
10481da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
10491da177e4SLinus Torvalds
10501da177e4SLinus Torvalds#
1051f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1052f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1053f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
1054f4d4ffc0SJason Cooper#
1055f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1056f4d4ffc0SJason Cooper
1057f4d4ffc0SJason Cooper#
10581da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
10591da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
1060070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
10611da177e4SLinus Torvalds#
10621da177e4SLinus Torvalds
1063df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
10641da177e4SLinus Torvaldsexport MODLIB
10651da177e4SLinus Torvalds
1066056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1067056d28d1SRolf Eike Beer
106833a57ce0SJiri Olsahas_libelf = $(call try-run,\
1069056d28d1SRolf Eike Beer               echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
107033a57ce0SJiri Olsa
107133a57ce0SJiri Olsaifdef CONFIG_STACK_VALIDATION
10729f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
10739f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
10749f0c18aeSJosh Poimboeuf  else
10759f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
10769f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
10779f0c18aeSJosh Poimboeuf  endif
10789f0c18aeSJosh Poimboeufendif
10799f0c18aeSJosh Poimboeuf
108050d3a3f8SJiri OlsaPHONY += resolve_btfids_clean
108150d3a3f8SJiri Olsa
10820e1aa629SJiri Olsaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
10830e1aa629SJiri Olsa
10840e1aa629SJiri Olsa# tools/bpf/resolve_btfids directory might not exist
10850e1aa629SJiri Olsa# in output directory, skip its clean in that case
108650d3a3f8SJiri Olsaresolve_btfids_clean:
10870e1aa629SJiri Olsaifneq ($(wildcard $(resolve_btfids_O)),)
10880e1aa629SJiri Olsa	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
10890e1aa629SJiri Olsaendif
109050d3a3f8SJiri Olsa
1091017dab34SJiri Olsaifdef CONFIG_BPF
109233a57ce0SJiri Olsaifdef CONFIG_DEBUG_INFO_BTF
109333a57ce0SJiri Olsa  ifeq ($(has_libelf),1)
109433a57ce0SJiri Olsa    resolve_btfids_target := tools/bpf/resolve_btfids FORCE
109533a57ce0SJiri Olsa  else
109633a57ce0SJiri Olsa    ERROR_RESOLVE_BTFIDS := 1
109733a57ce0SJiri Olsa  endif
1098017dab34SJiri Olsaendif # CONFIG_DEBUG_INFO_BTF
1099017dab34SJiri Olsaendif # CONFIG_BPF
110033a57ce0SJiri Olsa
1101e00d8880SMasahiro YamadaPHONY += prepare0
1102e2a666d5SRusty Russell
1103ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
11047f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order
11057f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
110647801c97SMasahiro Yamada
11071da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1108cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
11091da177e4SLinus Torvalds
111023febe37SMasahiro Yamadavmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
11111da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
111295fb6317SMasahiro Yamada		     $(libs-y) $(libs-m)))
11131da177e4SLinus Torvalds
11141eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
111523febe37SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(core-) \
111695fb6317SMasahiro Yamada			$(drivers-) $(libs-))))
11171da177e4SLinus Torvalds
1118b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \
1119b2c88554SMasahiro Yamada			$(core-y) $(core-m) $(libs-y) $(libs-m) \
1120b2c88554SMasahiro Yamada			$(drivers-y) $(drivers-m)))
11211da177e4SLinus Torvalds
1122c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
112376cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1124c99f3918SMasahiro Yamada
11251f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1126f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1127f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1128f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES
1129f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1130f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1131f0d50ca0SMasahiro Yamadaelse
1132f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1133f0d50ca0SMasahiro Yamadaendif
1134f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1135f0d50ca0SMasahiro Yamada
1136f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
113795698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
113885f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1139233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
11401da177e4SLinus Torvalds
1141d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
11421da177e4SLinus Torvalds
11433fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
11443fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
11452441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
11461f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
11471f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
11481f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
11491f50b80aSMasahiro YamadaKBUILD_MODULES := 1
1150fb2d99beSMasahiro Yamada
1151fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order
1152fb2d99beSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1153fb2d99beSMasahiro Yamada	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
11541f50b80aSMasahiro Yamadaendif
11551f50b80aSMasahiro Yamada
115607a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
115707a422bbSMasahiro Yamada
115888694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
115988694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
116088694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
116188694cffSQuentin Perret
116207a422bbSMasahiro Yamada$(autoksyms_h):
116388694cffSQuentin Perret	$(call cmd,autoksyms_h)
116423121ca2SNicolas Pitre
1165fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1166fbe6e37dSNicholas Piggin
1167fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1168fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
11693ec8a5b3SMasahiro Yamada	$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";    \
1170fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
11712441e78bSNicolas Pitre
11723fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
11730b956e20SRasmus Villemoes	+$(call if_changed_dep,link-vmlinux)
1174741f98feSSam Ravnborg
1175392885eeSMasahiro Yamadatargets := vmlinux
1176392885eeSMasahiro Yamada
11771da177e4SLinus Torvalds# The actual objects are generated when descending,
11781da177e4SLinus Torvalds# make sure no implicit rule kicks in
1179b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
11801da177e4SLinus Torvalds
1181ba97df45SMasahiro Yamadafilechk_kernel.release = \
11820d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
11830d0e7718SMichal Marek
118483a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
118524512795SMasahiro Yamadainclude/config/kernel.release: FORCE
11860d0e7718SMichal Marek	$(call filechk,kernel.release)
1187cb58455cSSam Ravnborg
1188d8821622SMasahiro Yamada# Additional helpers built in scripts/
1189d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1190d8821622SMasahiro Yamada# in parallel
1191d8821622SMasahiro YamadaPHONY += scripts
119260df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1193d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1194cb58455cSSam Ravnborg
11951da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
11965bb78269SSam Ravnborg# or the modules are listed in "prepare".
11975bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
11985bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
11995bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
12001da177e4SLinus Torvalds
1201a5139fb3SMasahiro YamadaPHONY += prepare archprepare
12025bb78269SSam Ravnborg
120336de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
12043044dd05SMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
12053044dd05SMasahiro Yamada	include/generated/autoconf.h
12065bb78269SSam Ravnborg
120765bba042SMasahiro Yamadaprepare0: archprepare
120860df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
12098d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
121086feeaa8SSam Ravnborg
12111da177e4SLinus Torvalds# All the preparing..
121233a57ce0SJiri Olsaprepare: prepare0 prepare-objtool prepare-resolve_btfids
1213b9ab5ebbSJosh Poimboeuf
12142c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
12157d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
12167d0e5c20SMasahiro Yamada
12172c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
12182c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1219037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1220037fc336SMasahiro Yamada	generic=include/asm-generic
12212c1f4f12SMasahiro Yamadauapi-asm-generic:
1222037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1223037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
12242c1f4f12SMasahiro Yamada
122533a57ce0SJiri OlsaPHONY += prepare-objtool prepare-resolve_btfids
12263b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1227ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
122822c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
122922c8542dSSami Tolvanen	@echo "error: Cannot generate __mcount_loc for CONFIG_DYNAMIC_FTRACE=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
123022c8542dSSami Tolvanen	@false
123122c8542dSSami Tolvanenendif
1232ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1233ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1234ef7cfd00SMasahiro Yamada	@false
1235ef7cfd00SMasahiro Yamadaelse
1236ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1237ef7cfd00SMasahiro Yamadaendif
1238ef7cfd00SMasahiro Yamadaendif
12391da177e4SLinus Torvalds
124033a57ce0SJiri Olsaprepare-resolve_btfids: $(resolve_btfids_target)
124133a57ce0SJiri Olsaifeq ($(ERROR_RESOLVE_BTFIDS),1)
124233a57ce0SJiri Olsa	@echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
124333a57ce0SJiri Olsa	@false
124433a57ce0SJiri Olsaendif
12451da177e4SLinus Torvalds# Generate some files
12461da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12471da177e4SLinus Torvalds
12481da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
12491da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
12501da177e4SLinus Torvalds
12511da177e4SLinus Torvaldsuts_len := 64
125263104eecSSam Ravnborgdefine filechk_utsrelease.h
12531da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
12541da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
12551da177e4SLinus Torvalds	  exit 1;                                                         \
12561da177e4SLinus Torvalds	fi;                                                               \
1257ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
12581da177e4SLinus Torvaldsendef
12591da177e4SLinus Torvalds
126063104eecSSam Ravnborgdefine filechk_version.h
12619b82f13eSSasha Levin	if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1262ad774086SMasahiro Yamada		echo \#define LINUX_VERSION_CODE $(shell                 \
1263207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
12649b82f13eSSasha Levin	else                                                             \
12659b82f13eSSasha Levin		echo \#define LINUX_VERSION_CODE $(shell                 \
1266207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
12679b82f13eSSasha Levin	fi;                                                              \
12689b82f13eSSasha Levin	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
126988a68672SSasha Levin	((c) > 255 ? 255 : (c)))';                                       \
127088a68672SSasha Levin	echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
127188a68672SSasha Levin	echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
127288a68672SSasha Levin	echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
127363104eecSSam Ravnborgendef
127463104eecSSam Ravnborg
1275207da4c8SMasahiro Yamada$(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1276207da4c8SMasahiro Yamada$(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
127743fee2b2SMasahiro Yamada$(version_h): FORCE
12781da177e4SLinus Torvalds	$(call filechk,version.h)
12791da177e4SLinus Torvalds
1280273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
128163104eecSSam Ravnborg	$(call filechk,utsrelease.h)
128263104eecSSam Ravnborg
1283179efcb4SVegard NossumPHONY += headerdep
1284179efcb4SVegard Nossumheaderdep:
12859663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
12869663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1287179efcb4SVegard Nossum
12881da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12898d730cfbSDavid Woodhouse# Kernel headers
12908d730cfbSDavid Woodhouse
1291e6883b18SSam Ravnborg#Default location for installed headers
1292e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1293e6883b18SSam Ravnborg
129459b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
129559b2bd05SMasahiro Yamada      cmd_headers_install = \
129659b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
129759b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
129859b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
12996d716275SDavid Woodhouse
13008d730cfbSDavid WoodhousePHONY += headers_install
130159b2bd05SMasahiro Yamadaheaders_install: headers
130259b2bd05SMasahiro Yamada	$(call cmd,headers_install)
13034f193362SPaul Smith
13041da177e4SLinus TorvaldsPHONY += archheaders archscripts
13051da177e4SLinus Torvalds
1306a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
13071da177e4SLinus Torvalds
130859b2bd05SMasahiro YamadaPHONY += headers
130959b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
13109d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
13112fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1312d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1313d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
13141f85712eSMike Frysinger
13157ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
131668475359SDavid WoodhousePHONY += headers_check
13177ecaf069SMasahiro Yamadaheaders_check:
1318609bbb4dSMasahiro Yamada	@echo >&2 "=================== WARNING ==================="
1319609bbb4dSMasahiro Yamada	@echo >&2 "Since Linux 5.5, 'make headers_check' is no-op,"
1320609bbb4dSMasahiro Yamada	@echo >&2 "and will be removed after Linux 5.15 release."
1321609bbb4dSMasahiro Yamada	@echo >&2 "Please remove headers_check from your scripts."
1322609bbb4dSMasahiro Yamada	@echo >&2 "==============================================="
132368475359SDavid Woodhouse
1324e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
132559b2bd05SMasahiro Yamadaprepare: headers
1326e949f4c2SMasahiro Yamadaendif
13271da177e4SLinus Torvalds
1328bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1329bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1330bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1331bdd7714bSMasahiro Yamada
13321da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13335a5da78bSShuah Khan# Kernel selftest
13345a5da78bSShuah Khan
13355a5da78bSShuah KhanPHONY += kselftest
13365a5da78bSShuah Khankselftest:
13372bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
13385a5da78bSShuah Khan
133917eac6c2SShuah Khankselftest-%: FORCE
134017eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1341dcb825a9SWang Long
13423d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
13433d6dee7aSBamvor Jian Zhangkselftest-merge:
13443d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
13456d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
13466d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
13473e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
13483d6dee7aSBamvor Jian Zhang
13495a5da78bSShuah Khan# ---------------------------------------------------------------------------
135037c8a5faSRob Herring# Devicetree files
135137c8a5faSRob Herring
135237c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
135337c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
135437c8a5faSRob Herringendif
135537c8a5faSRob Herring
135637c8a5faSRob Herringifneq ($(dtstree),)
135737c8a5faSRob Herring
1358a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
135937c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
136037c8a5faSRob Herring
1361ce88c9c7SViresh Kumar%.dtbo: include/config/kernel.release scripts_dtc
1362ce88c9c7SViresh Kumar	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1363ce88c9c7SViresh Kumar
1364c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1365b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
136637c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
136737c8a5faSRob Herring
1368b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1369e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1370b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1371b5154bf6SMasahiro Yamadaendif
1372b5154bf6SMasahiro Yamada
1373b5154bf6SMasahiro Yamadadtbs_check: dtbs
13744f0e3a57SRob Herring
137537c8a5faSRob Herringdtbs_install:
13762431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
137737c8a5faSRob Herring
137837c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
137937c8a5faSRob Herringall: dtbs
138037c8a5faSRob Herringendif
138137c8a5faSRob Herring
138237c8a5faSRob Herringendif
138337c8a5faSRob Herring
138437c8a5faSRob HerringPHONY += scripts_dtc
138537c8a5faSRob Herringscripts_dtc: scripts_basic
138637c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
138737c8a5faSRob Herring
1388e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1389e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1390e10c4321SMasahiro Yamadaendif
1391e10c4321SMasahiro Yamada
1392c473a8d0SMasahiro YamadaPHONY += dt_binding_check
13934f0e3a57SRob Herringdt_binding_check: scripts_dtc
13944f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
13954f0e3a57SRob Herring
139637c8a5faSRob Herring# ---------------------------------------------------------------------------
13971da177e4SLinus Torvalds# Modules
13981da177e4SLinus Torvalds
13991da177e4SLinus Torvaldsifdef CONFIG_MODULES
14001da177e4SLinus Torvalds
14011da177e4SLinus Torvalds# By default, build modules as well
14021da177e4SLinus Torvalds
140373d1393eSMichal Marekall: modules
14041da177e4SLinus Torvalds
14054b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider
14064b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to
14074b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them.
14084b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS
14094b50c8c4SMasahiro Yamada  KBUILD_BUILTIN := 1
14104b50c8c4SMasahiro Yamadaendif
14114b50c8c4SMasahiro Yamada
14121da177e4SLinus Torvalds# Build modules
1413551559e1STejun Heo#
1414551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1415551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1416551559e1STejun Heo# using awk while concatenating to the final file.
14171da177e4SLinus Torvalds
14184f193362SPaul SmithPHONY += modules
1419596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
14201da177e4SLinus Torvalds
1421b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1422b2c88554SMasahiro Yamada
1423b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE
1424b2c88554SMasahiro Yamada	$(call if_changed,modules_order)
1425b2c88554SMasahiro Yamada
1426b2c88554SMasahiro Yamadatargets += modules.order
1427a6c36632SMichal Marek
14281da177e4SLinus Torvalds# Target to prepare building external modules
14294f193362SPaul SmithPHONY += modules_prepare
1430059bc9fcSMasahiro Yamadamodules_prepare: prepare
1431596b0474SMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
14321da177e4SLinus Torvalds
1433*961ab4a3SMasahiro Yamadaexport modules_sign_only :=
1434*961ab4a3SMasahiro Yamada
1435*961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y)
1436*961ab4a3SMasahiro YamadaPHONY += modules_sign
1437*961ab4a3SMasahiro Yamadamodules_sign: modules_install
1438*961ab4a3SMasahiro Yamada	@:
1439*961ab4a3SMasahiro Yamada
1440*961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install.
1441*961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1442*961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),)
1443*961ab4a3SMasahiro Yamadamodules_sign_only := y
1444*961ab4a3SMasahiro Yamadaendif
1445*961ab4a3SMasahiro Yamadaendif
1446*961ab4a3SMasahiro Yamada
1447*961ab4a3SMasahiro Yamadamodinst_pre :=
1448*961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),)
1449*961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre
1450*961ab4a3SMasahiro Yamadaendif
1451*961ab4a3SMasahiro Yamada
1452*961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre)
14533e3005dfSMasahiro YamadaPHONY += __modinst_pre
14543e3005dfSMasahiro Yamada__modinst_pre:
14551da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
14561da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
14571da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
14588e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
14591da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
14601da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
14617e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
14621da177e4SLinus Torvalds	fi
14631bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
14642c6d9636SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
14652c6d9636SMasahiro Yamada	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
14661da177e4SLinus Torvalds
14671da177e4SLinus Torvaldsendif # CONFIG_MODULES
14681da177e4SLinus Torvalds
14691da177e4SLinus Torvalds###
14701da177e4SLinus Torvalds# Cleaning is done on three levels.
14711da177e4SLinus Torvalds# make clean     Delete most generated files
14721da177e4SLinus Torvalds#                Leave enough to build external modules
14731da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
14741da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
14751da177e4SLinus Torvalds
14761da177e4SLinus Torvalds# Directories & files removed with 'make clean'
147769bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
14783d32285fSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps \
14794c7858b9SMasahiro Yamada	       compile_commands.json .thinlto-cache
14801da177e4SLinus Torvalds
14811da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
14820663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
148346a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
14840663c68cSMasahiro Yamada		  debian snap tar-install \
14850663c68cSMasahiro Yamada		  .config .config.old .version \
148646457133SMasahiro Yamada		  Module.symvers \
1487fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1488fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
148946a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
149046a63d4bSMasahiro Yamada		  *.spec
14911da177e4SLinus Torvalds
149246457133SMasahiro Yamada# Directories & files removed with 'make distclean'
14934c7858b9SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
149446457133SMasahiro Yamada
14951da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
14961da177e4SLinus Torvalds#
14971da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
14981da177e4SLinus Torvalds
149976cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
15001da177e4SLinus Torvalds
1501bd1ee804SPawel Mollvmlinuxclean:
1502bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1503fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1504bd1ee804SPawel Moll
150550d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean
15061da177e4SLinus Torvalds
15071da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
15081da177e4SLinus Torvalds#
15091da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1510cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
15111da177e4SLinus Torvalds
1512b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
15131da177e4SLinus Torvalds$(mrproper-dirs):
15141da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
15151da177e4SLinus Torvalds
1516b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
15171da177e4SLinus Torvalds	$(call cmd,rmfiles)
15181da177e4SLinus Torvalds
15191da177e4SLinus Torvalds# distclean
15201da177e4SLinus Torvalds#
152146457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
152246457133SMasahiro Yamada
15234f193362SPaul SmithPHONY += distclean
15241da177e4SLinus Torvalds
15251da177e4SLinus Torvaldsdistclean: mrproper
152646457133SMasahiro Yamada	$(call cmd,rmfiles)
15271da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
15281da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1529f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1530f78271dfSMasahiro Yamada		-o -name 'core' \) \
15311da177e4SLinus Torvalds		-type f -print | xargs rm -f
15321da177e4SLinus Torvalds
15331da177e4SLinus Torvalds
15341da177e4SLinus Torvalds# Packaging of the kernel to various formats
15351da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15361da177e4SLinus Torvalds
1537bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1538000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1539031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1540000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
15411da177e4SLinus Torvalds
15421da177e4SLinus Torvalds# Brief documentation of the typical targets used
15431da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15441da177e4SLinus Torvalds
15455dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1546a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
15475dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
15485dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
15491da177e4SLinus Torvalds
1550fe69b420SMasahiro YamadaPHONY += help
15511da177e4SLinus Torvaldshelp:
15521da177e4SLinus Torvalds	@echo  'Cleaning targets:'
15535ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
15545cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
15555ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
15565cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
15571da177e4SLinus Torvalds	@echo  ''
15581da177e4SLinus Torvalds	@echo  'Configuration targets:'
15591da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
15601da177e4SLinus Torvalds	@echo  ''
15611da177e4SLinus Torvalds	@echo  'Other generic targets:'
15621da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
15631da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
15641da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
15659cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
15661da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
156740ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1568433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1569433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
157062718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
157162718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1572155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1573c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
15741da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
15751da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1576f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
15773f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
15783f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
15793f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
15802fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
158159df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
15822fb9b1bdSSam Ravnborg	 echo  ''
158331b8cc80SRandy Dunlap	@echo  'Static analysers:'
15841da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1585aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1586ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1587295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
158874425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
15897f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
15906ad7cbc0SNathan Huckleberry	@echo  '  clang-analyzer  - Check with clang static analyzer'
15916ad7cbc0SNathan Huckleberry	@echo  '  clang-tidy      - Check with clang-tidy'
159274425eeeSNicolas Palix	@echo  ''
1593eb8305aeSMatthias Maennich	@echo  'Tools:'
1594eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1595eb8305aeSMatthias Maennich	@echo  ''
159631b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1597e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
15985a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
15995a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1600e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1601e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1602e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1603dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1604e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1605e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
16065a5da78bSShuah Khan	@echo  ''
160737c8a5faSRob Herring	@$(if $(dtstree), \
160837c8a5faSRob Herring		echo 'Devicetree:'; \
160937c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
161037c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
16117aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
16127aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
161337c8a5faSRob Herring		echo '')
161437c8a5faSRob Herring
161531b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
161631b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
161731b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
161831b8cc80SRandy Dunlap	@echo  ''
16191da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1620000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
16211da177e4SLinus Torvalds	@echo  ''
16221da177e4SLinus Torvalds	@echo  'Documentation targets:'
1623cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
16241da177e4SLinus Torvalds	@echo  ''
162501dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
16261da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
162701dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
16281da177e4SLinus Torvalds	@echo  ''
16291da177e4SLinus Torvalds	@$(if $(boards), \
16301da177e4SLinus Torvalds		$(foreach b, $(boards), \
16314234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
16321da177e4SLinus Torvalds		echo '')
16335dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
16345dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
16355dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
16365dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
16375dffbe81SSegher Boessenkool		echo '')
16381da177e4SLinus Torvalds
16391da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
164045d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
16411da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1642a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1643a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1644701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1645af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1646e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
164728bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
164828bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
164928bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1650a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
16511da177e4SLinus Torvalds	@echo  ''
16521da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
16531da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
16541da177e4SLinus Torvalds
16551da177e4SLinus Torvalds
16565dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
16575dffbe81SSegher Boessenkool
16585dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
16595dffbe81SSegher Boessenkool
1660fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
16615dffbe81SSegher Boessenkool
16625dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
16635dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
16645dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
16655dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
16665dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
16675dffbe81SSegher Boessenkool		echo '')
16685dffbe81SSegher Boessenkool
16695dffbe81SSegher Boessenkool
16701da177e4SLinus Torvalds# Documentation targets
16711da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1672e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1673e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
167422cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1675bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1676cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
16771da177e4SLinus Torvalds
167867274c08SMasahiro Yamada# Misc
167967274c08SMasahiro Yamada# ---------------------------------------------------------------------------
168067274c08SMasahiro Yamada
168167274c08SMasahiro YamadaPHONY += scripts_gdb
16827a739ce5SMasahiro Yamadascripts_gdb: prepare0
16831e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
16848d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
168567274c08SMasahiro Yamada
168667274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
168767274c08SMasahiro Yamadaall: scripts_gdb
168867274c08SMasahiro Yamadaendif
168967274c08SMasahiro Yamada
16901da177e4SLinus Torvaldselse # KBUILD_EXTMOD
16911da177e4SLinus Torvalds
16921da177e4SLinus Torvalds###
16931da177e4SLinus Torvalds# External module support.
16941da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
16951da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
16961da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
16971da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
16981da177e4SLinus Torvalds# be used.
16991da177e4SLinus Torvalds#
17001da177e4SLinus Torvalds# The following are the only valid targets when building external
17011da177e4SLinus Torvalds# modules.
17021da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
17031da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
17041da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
17051da177e4SLinus Torvalds# make M=dir modules_install
1706070b98bfSSam Ravnborg#                      Install the modules built in the module directory
17071da177e4SLinus Torvalds#                      Assumes install directory is already created
17081da177e4SLinus Torvalds
17096212804fSMasahiro Yamada# We are always building only modules.
17106212804fSMasahiro YamadaKBUILD_BUILTIN :=
17111da177e4SLinus TorvaldsKBUILD_MODULES := 1
17121da177e4SLinus Torvalds
1713c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
17143d32285fSMasahiro Yamada$(MODORDER): descend
17153d32285fSMasahiro Yamada	@:
17163d32285fSMasahiro Yamada
17177f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json
17183d32285fSMasahiro YamadaPHONY += compile_commands.json
17193d32285fSMasahiro Yamada
172076cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
17213d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1722dc5723b0SSami Tolvanen	$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
17231da177e4SLinus Torvalds
1724fe69b420SMasahiro YamadaPHONY += help
17251da177e4SLinus Torvaldshelp:
17261da177e4SLinus Torvalds	@echo  '  Building external modules.'
17271da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
17281da177e4SLinus Torvalds	@echo  ''
17291da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
17301da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
17311da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
17321da177e4SLinus Torvalds	@echo  ''
173306300b21SSam Ravnborg
1734596b0474SMasahiro Yamada# no-op for external module builds
1735596b0474SMasahiro YamadaPHONY += prepare modules_prepare
1736596b0474SMasahiro Yamada
17371da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
17381da177e4SLinus Torvalds
17393e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
17403e3005dfSMasahiro Yamada# Modules
17413e3005dfSMasahiro Yamada
17423e3005dfSMasahiro YamadaPHONY += modules modules_install
17433e3005dfSMasahiro Yamada
17443e3005dfSMasahiro Yamadaifdef CONFIG_MODULES
17453e3005dfSMasahiro Yamada
17461a998be6SMasahiro Yamadamodules: modules_check
17473e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
17483e3005dfSMasahiro Yamada
17491a998be6SMasahiro YamadaPHONY += modules_check
17501a998be6SMasahiro Yamadamodules_check: $(MODORDER)
17511a998be6SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
17521a998be6SMasahiro Yamada
17533ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD  $(MODLIB)
17543e3005dfSMasahiro Yamada      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
17553e3005dfSMasahiro Yamada                   $(KERNELRELEASE)
17563e3005dfSMasahiro Yamada
17573e3005dfSMasahiro Yamadamodules_install:
17583e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
17593e3005dfSMasahiro Yamada	$(call cmd,depmod)
17603e3005dfSMasahiro Yamada
17613e3005dfSMasahiro Yamadaelse # CONFIG_MODULES
17623e3005dfSMasahiro Yamada
17633e3005dfSMasahiro Yamada# Modules not configured
17643e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
17653e3005dfSMasahiro Yamada
17663e3005dfSMasahiro Yamadamodules modules_install:
17673e3005dfSMasahiro Yamada	@echo >&2 '***'
17683e3005dfSMasahiro Yamada	@echo >&2 '*** The present kernel configuration has modules disabled.'
17693e3005dfSMasahiro Yamada	@echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
17703e3005dfSMasahiro Yamada	@echo >&2 '*** to enable CONFIG_MODULES.'
17713e3005dfSMasahiro Yamada	@echo >&2 '***'
17723e3005dfSMasahiro Yamada	@exit 1
17733e3005dfSMasahiro Yamada
17743e3005dfSMasahiro Yamadaendif # CONFIG_MODULES
17753e3005dfSMasahiro Yamada
1776b1fbfcb4SMasahiro Yamada# Single targets
1777b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1778b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1779b1fbfcb4SMasahiro Yamada#
1780b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1781b1fbfcb4SMasahiro Yamada#
1782b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1783b1fbfcb4SMasahiro Yamada#
1784b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1785b1fbfcb4SMasahiro Yamada#
1786b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1787b1fbfcb4SMasahiro Yamada
1788b1fbfcb4SMasahiro Yamadaifdef single-build
1789b1fbfcb4SMasahiro Yamada
1790b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1791b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1792b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1793b1fbfcb4SMasahiro Yamada
1794b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1795b1fbfcb4SMasahiro Yamada	@:
1796b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1797b1fbfcb4SMasahiro Yamada	@:
1798b1fbfcb4SMasahiro Yamada
1799b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1800b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1801b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1802b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1803b1fbfcb4SMasahiro Yamadaendif
1804b1fbfcb4SMasahiro Yamada
1805b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1806596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare
18077f69180bSMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
1808b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1809b1fbfcb4SMasahiro Yamada
1810b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1811b1fbfcb4SMasahiro Yamada
18127f69180bSMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
1813b1fbfcb4SMasahiro Yamada
1814b1fbfcb4SMasahiro Yamada# trim unrelated directories
1815b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1816b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1817b1fbfcb4SMasahiro Yamada
1818b1fbfcb4SMasahiro Yamadaendif
1819b1fbfcb4SMasahiro Yamada
1820b480fec9SMasahiro Yamadaifndef CONFIG_MODULES
1821b480fec9SMasahiro YamadaKBUILD_MODULES :=
1822b480fec9SMasahiro Yamadaendif
1823b480fec9SMasahiro Yamada
1824c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1825c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1826c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1827c99f3918SMasahiro Yamada# make menuconfig etc.
1828c99f3918SMasahiro Yamada# Error messages still appears in the original language
1829c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1830c99f3918SMasahiro Yamadadescend: $(build-dirs)
1831c99f3918SMasahiro Yamada$(build-dirs): prepare
1832b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
183320b1be59SMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
1834b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1835c99f3918SMasahiro Yamada
183676cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
183776cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
183876cd306dSMasahiro Yamada$(clean-dirs):
183976cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
184076cd306dSMasahiro Yamada
184188d7be03SMichal Marekclean: $(clean-dirs)
184288d7be03SMichal Marek	$(call cmd,rmfiles)
184343f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1844ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
18454f0e3a57SRob Herring		-o -name '*.ko.*' \
1846ce88c9c7SViresh Kumar		-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1847ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1848bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
184988d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
18509a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
18514fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
185288d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
18538b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
18546b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1855433db3e2SVinícius Tinti		-o -name '*.ll' \
185638e89184SSami Tolvanen		-o -name '*.gcno' \
185738e89184SSami Tolvanen		-o -name '*.*.symversions' \) -type f -print | xargs rm -f
185888d7be03SMichal Marek
18591da177e4SLinus Torvalds# Generate tags for editors
18601da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1861a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1862858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
18631da177e4SLinus Torvalds
1864f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
18651da177e4SLinus Torvalds	$(call cmd,tags)
18661da177e4SLinus Torvalds
1867eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1868eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1869eb8305aeSMatthias Maennich
1870eb8305aeSMatthias MaennichPHONY += nsdeps
1871bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1872eb8305aeSMatthias Maennichnsdeps: modules
1873bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1874eb8305aeSMatthias Maennich
18753d32285fSMasahiro Yamada# Clang Tooling
18763d32285fSMasahiro Yamada# ---------------------------------------------------------------------------
18773d32285fSMasahiro Yamada
18783d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN     $@
18793d32285fSMasahiro Yamada      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
18803d32285fSMasahiro Yamada
18817f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
18823d32285fSMasahiro Yamada	$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
18833d32285fSMasahiro Yamada	$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
18843d32285fSMasahiro Yamada	$(call if_changed,gen_compile_commands)
18853d32285fSMasahiro Yamada
18867f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json
18873d32285fSMasahiro Yamada
18886ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer
18896ad7cbc0SNathan Huckleberry
18906ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG
18916ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK   $<
18926ad7cbc0SNathan Huckleberry      cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
18936ad7cbc0SNathan Huckleberry
18947f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
18956ad7cbc0SNathan Huckleberry	$(call cmd,clang_tools)
18966ad7cbc0SNathan Huckleberryelse
18976ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer:
18986ad7cbc0SNathan Huckleberry	@echo "$@ requires CC=clang" >&2
18996ad7cbc0SNathan Huckleberry	@false
19006ad7cbc0SNathan Huckleberryendif
19016ad7cbc0SNathan Huckleberry
19021da177e4SLinus Torvalds# Scripts to check various things for consistency
19031da177e4SLinus Torvalds# ---------------------------------------------------------------------------
19041da177e4SLinus Torvalds
19057dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report
1906279f3dd3SPeter Foley
19071da177e4SLinus Torvaldsincludecheck:
1908436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19091da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
191080007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
19111da177e4SLinus Torvalds
19121da177e4SLinus Torvaldsversioncheck:
19132ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19141da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
191580007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
19161da177e4SLinus Torvalds
191774425eeeSNicolas Palixcoccicheck:
1918858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
191974425eeeSNicolas Palix
1920295ac051SAdrian Bunkexport_report:
1921295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1922295ac051SAdrian Bunk
1923c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1924e3ccf6e3SJeff Dike
1925011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1926011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1927011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1928011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1929011e3a9aSJeff Dikeifeq ($(ARCH), um)
1930011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1931011e3a9aSJeff Dikeelse
1932011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1933011e3a9aSJeff Dikeendif
19341da177e4SLinus Torvaldscheckstack:
19351da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
193675dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
19371da177e4SLinus Torvalds
19387b8ea53dSAmerigo Wangkernelrelease:
19397b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
194001ab1788SAmerigo Wang
1941cb58455cSSam Ravnborgkernelversion:
19422244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
19431da177e4SLinus Torvalds
1944c398ff00SMike Marciniszynimage_name:
1945c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1946c398ff00SMike Marciniszyn
1947ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1948f47a23ceSMasahiro Yamada
1949f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1950f47a23ceSMasahiro Yamadatools_silent=s
1951f47a23ceSMasahiro Yamadaendif
1952f47a23ceSMasahiro Yamada
1953ea01fa9fSBorislav Petkovtools/: FORCE
1954bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
195575dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1956ea01fa9fSBorislav Petkov
1957ea01fa9fSBorislav Petkovtools/%: FORCE
1958bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
195975dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1960ea01fa9fSBorislav Petkov
19611da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
19620663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
19631da177e4SLinus Torvalds
1964392885eeSMasahiro Yamada# read saved command lines for existing targets
1965392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
19661da177e4SLinus Torvalds
1967b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
19681da177e4SLinus Torvalds
196946b7c492SSZ Lin (林上智)endif # config-build
19702042b548SMasahiro Yamadaendif # mixed-build
1971688931a5SMasahiro Yamadaendif # need-sub-make
19721da177e4SLinus Torvalds
19734f193362SPaul SmithPHONY += FORCE
19741da177e4SLinus TorvaldsFORCE:
19754f193362SPaul Smith
1976bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1977fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
19784f193362SPaul Smith.PHONY: $(PHONY)
1979