xref: /openbmc/linux/Makefile (revision 39218ff4c625dbf2e68224024fe0acaa60bcd51a)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
3fe07bfdaSLinus TorvaldsPATCHLEVEL = 12
455922c9dSLinus TorvaldsSUBLEVEL = 0
5e49d033bSLinus TorvaldsEXTRAVERSION = -rc6
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
267993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
268993bdde9SMasahiro Yamada			  image_name
269394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
2702c1f4f12SMasahiro Yamada
2712042b548SMasahiro Yamadaconfig-build	:=
2722042b548SMasahiro Yamadamixed-build	:=
2732042b548SMasahiro Yamadaneed-config	:= 1
274d7942413SMasahiro Yamadamay-sync-config	:= 1
275394053f4SMasahiro Yamadasingle-build	:=
2762c1f4f12SMasahiro Yamada
2772c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2782c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2792042b548SMasahiro Yamada		need-config :=
2802c1f4f12SMasahiro Yamada	endif
2812c1f4f12SMasahiro Yamadaendif
2822c1f4f12SMasahiro Yamada
283d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
284d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
2852042b548SMasahiro Yamada		may-sync-config :=
286d7942413SMasahiro Yamada	endif
287d7942413SMasahiro Yamadaendif
288d7942413SMasahiro Yamada
289d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
2902042b548SMasahiro Yamada	may-sync-config :=
291d7942413SMasahiro Yamadaendif
292d7942413SMasahiro Yamada
2932c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
294efbf9726SMasahiro Yamada        ifneq ($(filter %config,$(MAKECMDGOALS)),)
2952042b548SMasahiro Yamada		config-build := 1
2962c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
2972042b548SMasahiro Yamada			mixed-build := 1
2982c1f4f12SMasahiro Yamada                endif
2992c1f4f12SMasahiro Yamada        endif
3002c1f4f12SMasahiro Yamadaendif
30122340a06SMasahiro Yamada
302394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
303394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
304394053f4SMasahiro Yamada	single-build := 1
305394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
306394053f4SMasahiro Yamada		mixed-build := 1
307394053f4SMasahiro Yamada	endif
308394053f4SMasahiro Yamadaendif
309394053f4SMasahiro Yamada
31022340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
31122340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
31222340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3132042b548SMasahiro Yamada		mixed-build := 1
31422340a06SMasahiro Yamada        endif
31522340a06SMasahiro Yamadaendif
31622340a06SMasahiro Yamada
3172c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3182c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3192c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3202042b548SMasahiro Yamada		mixed-build := 1
3212c1f4f12SMasahiro Yamada        endif
3222c1f4f12SMasahiro Yamadaendif
3232c1f4f12SMasahiro Yamada
3242042b548SMasahiro Yamadaifdef mixed-build
3252c1f4f12SMasahiro Yamada# ===========================================================================
3262c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3272c1f4f12SMasahiro Yamada# Handle them one by one.
3282c1f4f12SMasahiro Yamada
3292c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3302c1f4f12SMasahiro Yamada
331121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one
3322c1f4f12SMasahiro Yamada	@:
3332c1f4f12SMasahiro Yamada
3342c1f4f12SMasahiro Yamada__build_one_by_one:
3352c1f4f12SMasahiro Yamada	$(Q)set -e; \
3362c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3372c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3382c1f4f12SMasahiro Yamada	done
3392c1f4f12SMasahiro Yamada
3402042b548SMasahiro Yamadaelse # !mixed-build
3412c1f4f12SMasahiro Yamada
3422c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
3432c1f4f12SMasahiro Yamada
3442c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3452c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3462c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3472c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3482c1f4f12SMasahiro Yamada
349b2d35fa5SAnders Roxellinclude scripts/subarch.include
3501da177e4SLinus Torvalds
3511da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3521da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3531da177e4SLinus Torvalds#
3541da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3551da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3561da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3571da177e4SLinus Torvalds# make ARCH=ia64
3581da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3591da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3601da177e4SLinus Torvalds
3611da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3621da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3631da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3641da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3651da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3661da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3671da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3681da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3692331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3701da177e4SLinus Torvalds
3711da177e4SLinus Torvalds# Architecture as present in compile.h
3721da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3736752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3741da177e4SLinus Torvalds
375d746d647SSam Ravnborg# Additional ARCH settings for x86
376d746d647SSam Ravnborgifeq ($(ARCH),i386)
377d746d647SSam Ravnborg        SRCARCH := x86
378d746d647SSam Ravnborgendif
379d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
380d746d647SSam Ravnborg        SRCARCH := x86
381d746d647SSam Ravnborgendif
38274b469f2SSam Ravnborg
3835e538790SSam Ravnborg# Additional ARCH settings for sparc
384e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
385e69f58c0SNamhyung Kim       SRCARCH := sparc
386e69f58c0SNamhyung Kimendif
387a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
3885e538790SSam Ravnborg       SRCARCH := sparc
389a439fe51SSam Ravnborgendif
3902fb9b1bdSSam Ravnborg
3913cc000b5SPaul Mundt# Additional ARCH settings for sh
3923cc000b5SPaul Mundtifeq ($(ARCH),sh64)
3933cc000b5SPaul Mundt       SRCARCH := sh
3943cc000b5SPaul Mundtendif
3953cc000b5SPaul Mundt
39614cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
39741263fc6SBen Gardinerexport KCONFIG_CONFIG
39814cdd3c4SRoman Zippel
3992a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
4002a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig
4012a86f661SMasahiro Yamada
4021da177e4SLinus Torvalds# SHELL used by kbuild
403858805b3SMasahiro YamadaCONFIG_SHELL := sh
4041da177e4SLinus Torvalds
4056d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
4066d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4076d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
408d7f14c66SUwe Kleine-König
409a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
410a0d1c951SMasahiro YamadaHOSTCC	= clang
411a0d1c951SMasahiro YamadaHOSTCXX	= clang++
412a0d1c951SMasahiro Yamadaelse
4131da177e4SLinus TorvaldsHOSTCC	= gcc
4141da177e4SLinus TorvaldsHOSTCXX	= g++
415a0d1c951SMasahiro Yamadaendif
4167f3a59dbSMasahiro Yamada
4177f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
4187f3a59dbSMasahiro Yamada			      -O2 -fomit-frame-pointer -std=gnu89
4197f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS :=
4207f3a59dbSMasahiro Yamada
4217f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS   := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
422735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
423f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
424f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4251da177e4SLinus Torvalds
4261da177e4SLinus Torvalds# Make variables (CC, etc...)
4271da177e4SLinus TorvaldsCPP		= $(CC) -E
428a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
429a0d1c951SMasahiro YamadaCC		= clang
430a0d1c951SMasahiro YamadaLD		= ld.lld
431a0d1c951SMasahiro YamadaAR		= llvm-ar
432a0d1c951SMasahiro YamadaNM		= llvm-nm
433a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
434a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
435a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
436a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
437a0d1c951SMasahiro Yamadaelse
438a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
439a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
4401da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4411da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4421da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4431da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
444eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
445a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
446a0d1c951SMasahiro Yamadaendif
447e83b9f55SAndrii NakryikoPAHOLE		= pahole
448c9a0f3b8SJiri OlsaRESOLVE_BTFIDS	= $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
44973a4f6dbSMasahiro YamadaLEX		= flex
45073a4f6dbSMasahiro YamadaYACC		= bison
4511da177e4SLinus TorvaldsAWK		= awk
452caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
453436e980eSDominique MartinetDEPMOD		= depmod
4541da177e4SLinus TorvaldsPERL		= perl
455e9781b52SMasahiro YamadaPYTHON3		= python3
4561da177e4SLinus TorvaldsCHECK		= sparse
457858805b3SMasahiro YamadaBASH		= bash
458e4a42c82SDenis EfremovKGZIP		= gzip
459e4a42c82SDenis EfremovKBZIP2		= bzip2
460e4a42c82SDenis EfremovKLZOP		= lzop
4618dfb61dcSDenis EfremovLZMA		= lzma
4628dfb61dcSDenis EfremovLZ4		= lz4c
4638dfb61dcSDenis EfremovXZ		= xz
46448f7ddf7SNick TerrellZSTD		= zstd
4658dfb61dcSDenis Efremov
46680a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4676c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4680c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4696588169dSSam RavnborgCFLAGS_MODULE   =
4706588169dSSam RavnborgAFLAGS_MODULE   =
4716588169dSSam RavnborgLDFLAGS_MODULE  =
4721da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4731da177e4SLinus TorvaldsAFLAGS_KERNEL	=
474b36fad65SMichal MarekLDFLAGS_vmlinux =
4751da177e4SLinus Torvalds
476abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
477abbf1590SDavid HowellsUSERINCLUDE    := \
4789d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4799d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
480abbf1590SDavid Howells		-I$(srctree)/include/uapi \
4813308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
482ce6ed1c4SMasahiro Yamada                -include $(srctree)/include/linux/compiler-version.h \
483abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
484abbf1590SDavid Howells
4851da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
4861da177e4SLinus Torvalds# Needed to be compatible with the O= option
487abbf1590SDavid HowellsLINUXINCLUDE    := \
4889d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
4899d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
490051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
491f8224f7fSMasahiro Yamada		-I$(objtree)/include \
492f8224f7fSMasahiro Yamada		$(USERINCLUDE)
4931da177e4SLinus Torvalds
49442a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
495eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
49642a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
497b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
498172aad81SOlaf Hering		   -Werror=return-type -Wno-format-security \
499433dc2ebSMasahiro Yamada		   -std=gnu89
500433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
50180c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
50280c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
5036588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
5046588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
50510df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
506d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
5075241ab4cSMasahiro YamadaCLANG_FLAGS :=
5081da177e4SLinus Torvalds
509aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
510d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
511d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
51248f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
5137bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
5141da177e4SLinus Torvalds
515d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
5160e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
517222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
5186588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
51980c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
5201da177e4SLinus Torvalds
5211da177e4SLinus Torvalds# Files to ignore in find ... statements
5221da177e4SLinus Torvalds
523ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
524ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
525ae63b2d7SPrarit Bhargava			  -prune -o
526450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
527450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
5281da177e4SLinus Torvalds
5291da177e4SLinus Torvalds# ===========================================================================
5301da177e4SLinus Torvalds# Rules shared between *config targets and build targets
5311da177e4SLinus Torvalds
532312a3d09SCao jin# Basic helpers built in scripts/basic/
5334f193362SPaul SmithPHONY += scripts_basic
5341da177e4SLinus Torvaldsscripts_basic:
5351da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
536638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
5371da177e4SLinus Torvalds
5384f193362SPaul SmithPHONY += outputmakefile
539e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
540fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
541fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
542fd5f0cd6SJan Beulich# output directory.
5433a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5443a51ff34SVladimir Kondratiev# ignore whole output directory
5451da177e4SLinus Torvaldsoutputmakefile:
546051f278eSMasahiro Yamadaifdef building_out_of_srctree
547e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
548e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
549e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
550e8e83a23SMasahiro Yamada		echo >&2 "***"; \
551e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
552e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
553e8e83a23SMasahiro Yamada		echo >&2 "***"; \
554e8e83a23SMasahiro Yamada		false; \
555e8e83a23SMasahiro Yamada	fi
55692979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5574fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
558156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
559156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
560fd5f0cd6SJan Beulichendif
5611da177e4SLinus Torvalds
562db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
563db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
564db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
565db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade.
566c75173a2SNathan ChancellorCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1 | sed 's/\#//g')
567db07562aSNick Desaulniers
568db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
569ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
5705241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
571ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
572ca9b31f6SFangrui SongCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
573ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
574ae6b289aSChris Friesendif
575ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
576238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
577ae6b289aSChris Friesendif
5787e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1)
579238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
580876a0600SNathan Chancellorendif
581589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
582238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
583238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
5843bd98050SJoel Stanleyexport CLANG_FLAGS
585ae6b289aSChris Friesendif
586ae6b289aSChris Fries
5872042b548SMasahiro Yamadaifdef config-build
5881da177e4SLinus Torvalds# ===========================================================================
5891da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
5901da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
5911da177e4SLinus Torvalds
5921da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
5931da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
5941da177e4SLinus Torvalds# used for 'make defconfig'
595a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
596315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
5971da177e4SLinus Torvalds
59836de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
59931110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
60031110ebbSSam Ravnborg
60136de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
6021da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
6031da177e4SLinus Torvalds
6042042b548SMasahiro Yamadaelse #!config-build
6051da177e4SLinus Torvalds# ===========================================================================
6061da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
6071da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
6081da177e4SLinus Torvalds
6092c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
610121c2a13SMasahiro Yamada# but instead __all depend on modules
6112c1f4f12SMasahiro YamadaPHONY += all
6122c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
613121c2a13SMasahiro Yamada__all: all
6142c1f4f12SMasahiro Yamadaelse
615121c2a13SMasahiro Yamada__all: modules
6162c1f4f12SMasahiro Yamadaendif
6172c1f4f12SMasahiro Yamada
6182c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
6192c1f4f12SMasahiro Yamada# Normally, just do built-in.
6202c1f4f12SMasahiro Yamada
6212c1f4f12SMasahiro YamadaKBUILD_MODULES :=
6222c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
6232c1f4f12SMasahiro Yamada
6242c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
6252c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
6264b50c8c4SMasahiro Yamada  KBUILD_BUILTIN :=
6272c1f4f12SMasahiro Yamadaendif
6282c1f4f12SMasahiro Yamada
6292c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
6302c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
6312c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
6322c1f4f12SMasahiro Yamada
6336ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
6342c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6352c1f4f12SMasahiro Yamadaendif
6362c1f4f12SMasahiro Yamada
6372c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6382c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6392c1f4f12SMasahiro Yamadaendif
6402c1f4f12SMasahiro Yamada
6412c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6422c1f4f12SMasahiro Yamada
6432042b548SMasahiro Yamadaifdef need-config
644d93a18f2SMasahiro Yamadainclude include/config/auto.conf
645d93a18f2SMasahiro Yamadaendif
646d93a18f2SMasahiro Yamada
6471da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6481da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
64923febe37SMasahiro Yamadacore-y		:= init/ usr/
650f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
651d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
6528b5f4eb3SMasahiro Yamadadrivers-$(CONFIG_NET) += net/
6538b5f4eb3SMasahiro Yamadadrivers-y	+= virt/
6541da177e4SLinus Torvaldslibs-y		:= lib/
6551da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6561da177e4SLinus Torvalds
657315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
658315bab4eSMasahiro Yamada# command line.
659315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
660315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
661315bab4eSMasahiro Yamadaall: vmlinux
662315bab4eSMasahiro Yamada
663315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
664315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
665315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
6665aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
667315bab4eSMasahiro Yamada
668b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
669b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
670b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
671b1f4ff74SPaulo Zanoniendif
672b1f4ff74SPaulo Zanoni
673669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
674669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
675669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
676669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
677669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
678669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
679669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
680669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
681669e06b1SMasahiro Yamada
682315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
683315bab4eSMasahiro Yamada
6842042b548SMasahiro Yamadaifdef need-config
6852042b548SMasahiro Yamadaifdef may-sync-config
686315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
687315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
688315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
689d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
6901da177e4SLinus Torvalds
69105850719SMasahiro Yamada$(KCONFIG_CONFIG):
69205850719SMasahiro Yamada	@echo >&2 '***'
69305850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
69405850719SMasahiro Yamada	@echo >&2 '***'
69505850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
69605850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
69705850719SMasahiro Yamada	@echo >&2 '***'
69805850719SMasahiro Yamada	@/bin/false
6991da177e4SLinus Torvalds
70061277981SUlf Magnusson# The actual configuration files used during the build are stored in
70161277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
70261277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
7039390dff6SMasahiro Yamada#
7049390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
7059390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
706f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
70723cd88c9SMasahiro Yamadaquiet_cmd_syncconfig = SYNC    $@
70823cd88c9SMasahiro Yamada      cmd_syncconfig = $(MAKE) -f $(srctree)/Makefile syncconfig
70923cd88c9SMasahiro Yamada
7103044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
71123cd88c9SMasahiro Yamada	+$(call cmd,syncconfig)
7122042b548SMasahiro Yamadaelse # !may-sync-config
713d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
714d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
715d7942413SMasahiro Yamada# Use auto.conf to trigger the test
7169ee4e336SSam RavnborgPHONY += include/config/auto.conf
7179ee4e336SSam Ravnborg
7189ee4e336SSam Ravnborginclude/config/auto.conf:
719264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
7205369f550SMichal Marek	echo >&2;							\
7215369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
7225369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
7235369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
7245369f550SMichal Marek	echo >&2 ;							\
7259ee4e336SSam Ravnborg	/bin/false)
7269ee4e336SSam Ravnborg
727d7942413SMasahiro Yamadaendif # may-sync-config
7282042b548SMasahiro Yamadaendif # need-config
7291da177e4SLinus Torvalds
730a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
731ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
732bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
733bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7346f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
735a1c48bb1SGeert Uytterhoeven
73615f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
737a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
73815f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
73915f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
74015f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
74115f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
7421da177e4SLinus Torvaldsendif
7431da177e4SLinus Torvalds
74469102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
74569102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
746b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
74769102311SJiri Kosina
7481873e870SAndi Kleenifdef CONFIG_READABLE_ASM
7491873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
7501873e870SAndi Kleen# reorder blocks reorders the control in the function
7511873e870SAndi Kleen# ipa clone creates specialized cloned functions
7521873e870SAndi Kleen# partial inlining inlines only parts of functions
7531873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
7541873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
7551873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
7561873e870SAndi Kleenendif
7571873e870SAndi Kleen
75808f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
759a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
76035bb5b1eSAndi Kleenendif
76135bb5b1eSAndi Kleen
762893ab004SMasahiro Yamadastackp-flags-y                                    := -fno-stack-protector
763050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
764050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
7652a61f474SMasahiro Yamada
7662a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
767e06b8b98SSam Ravnborg
768076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
769a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
770a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
771a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
772cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
773cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
774cfe17c9bSMasahiro Yamada# See modpost pattern 2
775a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
776cfe17c9bSMasahiro Yamadaelse
777cfe17c9bSMasahiro Yamada
778cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
779cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
7809df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
781e2079e93SNathan Chancellor
782e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
783e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
784e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
785e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
786cfe17c9bSMasahiro Yamadaendif
787cfe17c9bSMasahiro Yamada
7880a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
7891da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
790a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
7911da177e4SLinus Torvaldselse
7927e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
7937e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
7947e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
7957e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
7967e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
7977e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
798a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
7991da177e4SLinus Torvaldsendif
8007e9501fdSRabin Vincentendif
8011da177e4SLinus Torvalds
802f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern.
803f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN
804709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
805709a972eSKees Cookendif
806709a972eSKees Cook
807f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value.
808f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO
809f0fe00d4Sglider@google.com# Future support for zero initialization is still being debated, see
810f0fe00d4Sglider@google.com# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
811f0fe00d4Sglider@google.com# renamed or dropped.
812f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
813f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
814f0fe00d4Sglider@google.comendif
815f0fe00d4Sglider@google.com
816*39218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes
817*39218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers.
818*39218ff4SKees CookKBUILD_CFLAGS	+= $(call cc-option, -fno-stack-clash-protection)
819*39218ff4SKees Cook
820315da87cSMasahiro YamadaDEBUG_CFLAGS	:=
821315da87cSMasahiro Yamada
822121c5d08SMark Wielaard# Workaround for GCC versions < 5.0
823121c5d08SMark Wielaard# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
824121c5d08SMark Wielaardifdef CONFIG_CC_IS_GCC
825315da87cSMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
826121c5d08SMark Wielaardendif
8272062afb4SLinus Torvalds
8281da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
829695afd3dSSedat Dilek
830866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
8319d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
832866ced95SAndi Kleenelse
8331e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
834866ced95SAndi Kleenendif
835695afd3dSSedat Dilek
836b8a90923SNick Desaulniersifneq ($(LLVM_IAS),1)
8372288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
838b8a90923SNick Desaulniersendif
839695afd3dSSedat Dilek
840a66049e2SNick Desaulniersifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
841a66049e2SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
84298cd6f52SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
843a66049e2SNick DesaulniersDEBUG_CFLAGS	+= -gdwarf-$(dwarf-version-y)
844bfaf2dd3SAndi Kleenendif
8451da177e4SLinus Torvalds
846d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
8471e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
848e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
849d6f4ceb7SAndi Kleenendif
850d6f4ceb7SAndi Kleen
85110e68b02SNick Desaulniersifdef CONFIG_DEBUG_INFO_COMPRESSED
85210e68b02SNick DesaulniersDEBUG_CFLAGS	+= -gz=zlib
8537b169944SArvind SankarKBUILD_AFLAGS	+= -gz=zlib
85410e68b02SNick DesaulniersKBUILD_LDFLAGS	+= --compress-debug-sections=zlib
85510e68b02SNick Desaulniersendif
85610e68b02SNick Desaulniers
857695afd3dSSedat Dilekendif # CONFIG_DEBUG_INFO
858695afd3dSSedat Dilek
8591e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
8601e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
8611e88e415SMasahiro Yamada
862606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
8633b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC
86407d04081SVasily Gorbik  CC_FLAGS_FTRACE	+= -mrecord-mcount
8652f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8662f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8672f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8682f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8692f4df001SVasily Gorbik    endif
8702f4df001SVasily Gorbik  endif
87107d04081SVasily Gorbikendif
87222c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
87322c8542dSSami Tolvanen  CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
87422c8542dSSami Tolvanenendif
8753b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
8763b15cdc1SSami Tolvanen  ifdef CONFIG_HAVE_C_RECORDMCOUNT
8773b15cdc1SSami Tolvanen    BUILD_C_RECORDMCOUNT := y
8783b15cdc1SSami Tolvanen    export BUILD_C_RECORDMCOUNT
8793b15cdc1SSami Tolvanen  endif
8803b15cdc1SSami Tolvanenendif
881a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
882f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
883f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
884f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
885a2546faeSSteven Rostedt  endif
886f28bc3c3SVasily Gorbikendif
887f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
888f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
889f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
89016444a8aSArnaldo Carvalho de Meloendif
89116444a8aSArnaldo Carvalho de Melo
89291341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
89391341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
89491341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
89591341d4bSSam Ravnborgendif
89691341d4bSSam Ravnborg
89790ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
898e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
899e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
90090ad4052SMasahiro Yamadaendif
90190ad4052SMasahiro Yamada
902d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK
903d08b9f0cSSami TolvanenCC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
904d08b9f0cSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
905d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS
906d08b9f0cSSami Tolvanenendif
907d08b9f0cSSami Tolvanen
908dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG
909dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN
9102b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto=thin -fsplit-lto-unit
911dc5723b0SSami TolvanenKBUILD_LDFLAGS	+= --thinlto-cache-dir=$(extmod-prefix).thinlto-cache
912dc5723b0SSami Tolvanenelse
9132b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto
914dc5723b0SSami Tolvanenendif
915dc5723b0SSami TolvanenCC_FLAGS_LTO	+= -fvisibility=hidden
91622d429e7SSami Tolvanen
91722d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size
91822d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5
919dc5723b0SSami Tolvanenendif
920dc5723b0SSami Tolvanen
921dc5723b0SSami Tolvanenifdef CONFIG_LTO
9225e95325fSSami TolvanenKBUILD_CFLAGS	+= -fno-lto $(CC_FLAGS_LTO)
9235e95325fSSami TolvanenKBUILD_AFLAGS	+= -fno-lto
924dc5723b0SSami Tolvanenexport CC_FLAGS_LTO
925dc5723b0SSami Tolvanenendif
926dc5723b0SSami Tolvanen
92709c60546SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B
92809c60546SFeng TangKBUILD_CFLAGS += -falign-functions=32
92909c60546SFeng Tangendif
93009c60546SFeng Tang
931e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
932e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
933e8e69931SSam Ravnborg
9341da177e4SLinus Torvalds# warn about C99 declaration after statement
935a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
9361da177e4SLinus Torvalds
9370bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
9388289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
9390bb95f80SKees Cook
940070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
941fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
9421da177e4SLinus Torvalds
943217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
944217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
945217c3e01SStephen Rothwell
9465c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
9475c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
94844720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
9495a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
9505c45de21SLinus Torvalds
951adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
952adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
953adc71920SLinus Torvalds
95478a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
95578a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
95678a5255fSLinus Torvalds
957fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
9588b42cf2fSMasahiro YamadaKBUILD_CFLAGS	+= -fno-strict-overflow
959d0115552SLinus Torvalds
9603ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
9617d4eb0d8SMasahiro YamadaKBUILD_CFLAGS  += -fno-stack-check
9623ce120b1SLinus Torvalds
9638f7f5c9fSAndi Kleen# conserve stack if available
9648f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
9658f7f5c9fSAndi Kleen
966fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
96787de84c9SMasahiro YamadaKBUILD_CFLAGS   += -Werror=date-time
968fe7c36c7SJosh Triplett
969ea8daa7bSDaniel Wagner# enforce correct pointer usage
970ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
971ea8daa7bSDaniel Wagner
972c834f0e8SKees Cook# Require designated initializers for all marked structures
973c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
974c834f0e8SKees Cook
975a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
976a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
977a73619a8SMasahiro Yamada
978e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed
979e0fe0bbeSMasahiro Yamadainclude-y			:= scripts/Makefile.extrawarn
980e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
981e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
982e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN)		+= scripts/Makefile.ubsan
983e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV)		+= scripts/Makefile.kcov
984e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS)	+= scripts/Makefile.gcc-plugins
985e0fe0bbeSMasahiro Yamada
986e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y))
987a86fe353SMasahiro Yamada
988132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last.
989132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel
990132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point.
991bf5438fcSJason Baron
9928cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
9938cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
9948cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
9958cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
99652bcc330SSam Ravnborg
997a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1
998a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1
99918991197SRoland McGrath
10005d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1001d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
10025d7d18f5SDavid Howellsendif
10035d7d18f5SDavid Howells
10045cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
10055cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
10065cf896fbSPeter Collingbourneendif
10075cf896fbSPeter Collingbourne
100859612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the
100959612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script.
101059612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN
101159612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn
101259612b24SNathan Chancellorendif
101359612b24SNathan Chancellor
10147f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
10157f58b487SMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10167f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
10177f3a59dbSMasahiro Yamada
101880591e61SLuc Van Oostenryck# make the checker run with the right architecture
101980591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
102080591e61SLuc Van Oostenryck
102114516765SLuc Van Oostenryck# insure the checker run with the right endianness
102214516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
102314516765SLuc Van Oostenryck
10241f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
10251f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
10261f2f01b1SLuc Van Oostenryck
10271da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
10281da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
10291da177e4SLinus Torvalds# set in the environment
10301da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
10311da177e4SLinus Torvalds# this default value
10321da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
10331da177e4SLinus Torvalds
10341da177e4SLinus Torvalds#
10351da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
10361da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
10371da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
10381da177e4SLinus Torvalds
10391da177e4SLinus Torvalds#
1040f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1041f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1042f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
1043f4d4ffc0SJason Cooper#
1044f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1045f4d4ffc0SJason Cooper
1046f4d4ffc0SJason Cooper#
10471da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
10481da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
1049070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
10501da177e4SLinus Torvalds#
10511da177e4SLinus Torvalds
1052df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
10531da177e4SLinus Torvaldsexport MODLIB
10541da177e4SLinus Torvalds
1055ac031f26STheodore Ts'o#
10562ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
10572ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
10582ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
1059177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
10602ea03891SSam Ravnborg
1061ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
1062ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
10632ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
1064ac031f26STheodore Ts'oelse
10652ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
1066ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
1067ac031f26STheodore Ts'oelse
10682ea03891SSam Ravnborgmod_strip_cmd = true
1069ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
1070ac031f26STheodore Ts'oexport mod_strip_cmd
1071ac031f26STheodore Ts'o
1072beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
1073beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
1074beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
1075beb50df3SBertrand Jacquin
1076beb50df3SBertrand Jacquinmod_compress_cmd = true
1077beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
1078beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
1079e4a42c82SDenis Efremov    mod_compress_cmd = $(KGZIP) -n -f
1080beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
1081beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
1082db4632c6STor Vic    mod_compress_cmd = $(XZ) --lzma2=dict=2MiB -f
1083beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
1084beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
1085beb50df3SBertrand Jacquinexport mod_compress_cmd
1086beb50df3SBertrand Jacquin
1087d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
10883ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
10893ee550f1SDavid Woodhouse
10903ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1091e2a666d5SRusty Russellelse
1092e2a666d5SRusty Russellmod_sign_cmd = true
1093e2a666d5SRusty Russellendif
1094e2a666d5SRusty Russellexport mod_sign_cmd
1095e2a666d5SRusty Russell
1096056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1097056d28d1SRolf Eike Beer
109833a57ce0SJiri Olsahas_libelf = $(call try-run,\
1099056d28d1SRolf Eike Beer               echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
110033a57ce0SJiri Olsa
110133a57ce0SJiri Olsaifdef CONFIG_STACK_VALIDATION
11029f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
11039f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
11049f0c18aeSJosh Poimboeuf  else
11059f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
11069f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
11079f0c18aeSJosh Poimboeuf  endif
11089f0c18aeSJosh Poimboeufendif
11099f0c18aeSJosh Poimboeuf
111050d3a3f8SJiri OlsaPHONY += resolve_btfids_clean
111150d3a3f8SJiri Olsa
11120e1aa629SJiri Olsaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
11130e1aa629SJiri Olsa
11140e1aa629SJiri Olsa# tools/bpf/resolve_btfids directory might not exist
11150e1aa629SJiri Olsa# in output directory, skip its clean in that case
111650d3a3f8SJiri Olsaresolve_btfids_clean:
11170e1aa629SJiri Olsaifneq ($(wildcard $(resolve_btfids_O)),)
11180e1aa629SJiri Olsa	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
11190e1aa629SJiri Olsaendif
112050d3a3f8SJiri Olsa
1121017dab34SJiri Olsaifdef CONFIG_BPF
112233a57ce0SJiri Olsaifdef CONFIG_DEBUG_INFO_BTF
112333a57ce0SJiri Olsa  ifeq ($(has_libelf),1)
112433a57ce0SJiri Olsa    resolve_btfids_target := tools/bpf/resolve_btfids FORCE
112533a57ce0SJiri Olsa  else
112633a57ce0SJiri Olsa    ERROR_RESOLVE_BTFIDS := 1
112733a57ce0SJiri Olsa  endif
1128017dab34SJiri Olsaendif # CONFIG_DEBUG_INFO_BTF
1129017dab34SJiri Olsaendif # CONFIG_BPF
113033a57ce0SJiri Olsa
1131e00d8880SMasahiro YamadaPHONY += prepare0
1132e2a666d5SRusty Russell
1133bcf637f5SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
1134394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
1135bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
113647801c97SMasahiro Yamada
11371da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1138cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
11391da177e4SLinus Torvalds
114023febe37SMasahiro Yamadavmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
11411da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
114295fb6317SMasahiro Yamada		     $(libs-y) $(libs-m)))
11431da177e4SLinus Torvalds
11441eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
114523febe37SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(core-) \
114695fb6317SMasahiro Yamada			$(drivers-) $(libs-))))
11471da177e4SLinus Torvalds
1148b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \
1149b2c88554SMasahiro Yamada			$(core-y) $(core-m) $(libs-y) $(libs-m) \
1150b2c88554SMasahiro Yamada			$(drivers-y) $(drivers-m)))
11511da177e4SLinus Torvalds
1152c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
115376cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1154c99f3918SMasahiro Yamada
11551f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1156f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1157f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1158f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES
1159f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1160f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1161f0d50ca0SMasahiro Yamadaelse
1162f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1163f0d50ca0SMasahiro Yamadaendif
1164f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1165f0d50ca0SMasahiro Yamada
1166f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
116795698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
116885f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1169233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
11701da177e4SLinus Torvalds
1171d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
11721da177e4SLinus Torvalds
11733fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
11743fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
11752441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
11761f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
11771f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
11781f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
11791f50b80aSMasahiro YamadaKBUILD_MODULES := 1
1180fb2d99beSMasahiro Yamada
1181fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order
1182fb2d99beSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1183fb2d99beSMasahiro Yamada	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
11841f50b80aSMasahiro Yamadaendif
11851f50b80aSMasahiro Yamada
118607a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
118707a422bbSMasahiro Yamada
118888694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
118988694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
119088694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
119188694cffSQuentin Perret
119207a422bbSMasahiro Yamada$(autoksyms_h):
119388694cffSQuentin Perret	$(call cmd,autoksyms_h)
119423121ca2SNicolas Pitre
1195fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1196fbe6e37dSNicholas Piggin
1197fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1198fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
11993ec8a5b3SMasahiro Yamada	$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";    \
1200fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
12012441e78bSNicolas Pitre
12023fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
12031f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1204741f98feSSam Ravnborg
1205392885eeSMasahiro Yamadatargets := vmlinux
1206392885eeSMasahiro Yamada
12071da177e4SLinus Torvalds# The actual objects are generated when descending,
12081da177e4SLinus Torvalds# make sure no implicit rule kicks in
1209b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
12101da177e4SLinus Torvalds
1211ba97df45SMasahiro Yamadafilechk_kernel.release = \
12120d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
12130d0e7718SMichal Marek
121483a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
121524512795SMasahiro Yamadainclude/config/kernel.release: FORCE
12160d0e7718SMichal Marek	$(call filechk,kernel.release)
1217cb58455cSSam Ravnborg
1218d8821622SMasahiro Yamada# Additional helpers built in scripts/
1219d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1220d8821622SMasahiro Yamada# in parallel
1221d8821622SMasahiro YamadaPHONY += scripts
122260df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1223d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1224cb58455cSSam Ravnborg
12251da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
12265bb78269SSam Ravnborg# or the modules are listed in "prepare".
12275bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
12285bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
12295bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
12301da177e4SLinus Torvalds
1231a5139fb3SMasahiro YamadaPHONY += prepare archprepare
12325bb78269SSam Ravnborg
123336de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
12343044dd05SMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
12353044dd05SMasahiro Yamada	include/generated/autoconf.h
12365bb78269SSam Ravnborg
123765bba042SMasahiro Yamadaprepare0: archprepare
123860df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
12398d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
124086feeaa8SSam Ravnborg
12411da177e4SLinus Torvalds# All the preparing..
124233a57ce0SJiri Olsaprepare: prepare0 prepare-objtool prepare-resolve_btfids
1243b9ab5ebbSJosh Poimboeuf
12442c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
12457d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
12467d0e5c20SMasahiro Yamada
12472c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
12482c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1249037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1250037fc336SMasahiro Yamada	generic=include/asm-generic
12512c1f4f12SMasahiro Yamadauapi-asm-generic:
1252037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1253037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
12542c1f4f12SMasahiro Yamada
125533a57ce0SJiri OlsaPHONY += prepare-objtool prepare-resolve_btfids
12563b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1257ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
125822c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
125922c8542dSSami Tolvanen	@echo "error: Cannot generate __mcount_loc for CONFIG_DYNAMIC_FTRACE=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
126022c8542dSSami Tolvanen	@false
126122c8542dSSami Tolvanenendif
1262ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1263ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1264ef7cfd00SMasahiro Yamada	@false
1265ef7cfd00SMasahiro Yamadaelse
1266ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1267ef7cfd00SMasahiro Yamadaendif
1268ef7cfd00SMasahiro Yamadaendif
12691da177e4SLinus Torvalds
127033a57ce0SJiri Olsaprepare-resolve_btfids: $(resolve_btfids_target)
127133a57ce0SJiri Olsaifeq ($(ERROR_RESOLVE_BTFIDS),1)
127233a57ce0SJiri Olsa	@echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
127333a57ce0SJiri Olsa	@false
127433a57ce0SJiri Olsaendif
12751da177e4SLinus Torvalds# Generate some files
12761da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12771da177e4SLinus Torvalds
12781da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
12791da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
12801da177e4SLinus Torvalds
12811da177e4SLinus Torvaldsuts_len := 64
128263104eecSSam Ravnborgdefine filechk_utsrelease.h
12831da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
12841da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
12851da177e4SLinus Torvalds	  exit 1;                                                         \
12861da177e4SLinus Torvalds	fi;                                                               \
1287ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
12881da177e4SLinus Torvaldsendef
12891da177e4SLinus Torvalds
129063104eecSSam Ravnborgdefine filechk_version.h
12919b82f13eSSasha Levin	if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1292ad774086SMasahiro Yamada		echo \#define LINUX_VERSION_CODE $(shell                 \
1293207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
12949b82f13eSSasha Levin	else                                                             \
12959b82f13eSSasha Levin		echo \#define LINUX_VERSION_CODE $(shell                 \
1296207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
12979b82f13eSSasha Levin	fi;                                                              \
12989b82f13eSSasha Levin	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
129988a68672SSasha Levin	((c) > 255 ? 255 : (c)))';                                       \
130088a68672SSasha Levin	echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
130188a68672SSasha Levin	echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
130288a68672SSasha Levin	echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
130363104eecSSam Ravnborgendef
130463104eecSSam Ravnborg
1305207da4c8SMasahiro Yamada$(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1306207da4c8SMasahiro Yamada$(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
130743fee2b2SMasahiro Yamada$(version_h): FORCE
13081da177e4SLinus Torvalds	$(call filechk,version.h)
13091da177e4SLinus Torvalds
1310273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
131163104eecSSam Ravnborg	$(call filechk,utsrelease.h)
131263104eecSSam Ravnborg
1313179efcb4SVegard NossumPHONY += headerdep
1314179efcb4SVegard Nossumheaderdep:
13159663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
13169663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1317179efcb4SVegard Nossum
13181da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13198d730cfbSDavid Woodhouse# Kernel headers
13208d730cfbSDavid Woodhouse
1321e6883b18SSam Ravnborg#Default location for installed headers
1322e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1323e6883b18SSam Ravnborg
132459b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
132559b2bd05SMasahiro Yamada      cmd_headers_install = \
132659b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
132759b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
132859b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
13296d716275SDavid Woodhouse
13308d730cfbSDavid WoodhousePHONY += headers_install
133159b2bd05SMasahiro Yamadaheaders_install: headers
133259b2bd05SMasahiro Yamada	$(call cmd,headers_install)
13334f193362SPaul Smith
13341da177e4SLinus TorvaldsPHONY += archheaders archscripts
13351da177e4SLinus Torvalds
1336a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
13371da177e4SLinus Torvalds
133859b2bd05SMasahiro YamadaPHONY += headers
133959b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
13409d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
13412fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1342d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1343d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
13441f85712eSMike Frysinger
13457ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
134668475359SDavid WoodhousePHONY += headers_check
13477ecaf069SMasahiro Yamadaheaders_check:
13487ecaf069SMasahiro Yamada	@:
134968475359SDavid Woodhouse
1350e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
135159b2bd05SMasahiro Yamadaprepare: headers
1352e949f4c2SMasahiro Yamadaendif
13531da177e4SLinus Torvalds
1354bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1355bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1356bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1357bdd7714bSMasahiro Yamada
13581da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13595a5da78bSShuah Khan# Kernel selftest
13605a5da78bSShuah Khan
13615a5da78bSShuah KhanPHONY += kselftest
13625a5da78bSShuah Khankselftest:
13632bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
13645a5da78bSShuah Khan
136517eac6c2SShuah Khankselftest-%: FORCE
136617eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1367dcb825a9SWang Long
13683d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
13693d6dee7aSBamvor Jian Zhangkselftest-merge:
13703d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
13716d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
13726d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
13733e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
13743d6dee7aSBamvor Jian Zhang
13755a5da78bSShuah Khan# ---------------------------------------------------------------------------
137637c8a5faSRob Herring# Devicetree files
137737c8a5faSRob Herring
137837c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
137937c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
138037c8a5faSRob Herringendif
138137c8a5faSRob Herring
138237c8a5faSRob Herringifneq ($(dtstree),)
138337c8a5faSRob Herring
1384a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
138537c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
138637c8a5faSRob Herring
1387ce88c9c7SViresh Kumar%.dtbo: include/config/kernel.release scripts_dtc
1388ce88c9c7SViresh Kumar	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1389ce88c9c7SViresh Kumar
1390c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1391b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
139237c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
139337c8a5faSRob Herring
1394b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1395e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1396b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1397b5154bf6SMasahiro Yamadaendif
1398b5154bf6SMasahiro Yamada
1399b5154bf6SMasahiro Yamadadtbs_check: dtbs
14004f0e3a57SRob Herring
140137c8a5faSRob Herringdtbs_install:
14022431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
140337c8a5faSRob Herring
140437c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
140537c8a5faSRob Herringall: dtbs
140637c8a5faSRob Herringendif
140737c8a5faSRob Herring
140837c8a5faSRob Herringendif
140937c8a5faSRob Herring
141037c8a5faSRob HerringPHONY += scripts_dtc
141137c8a5faSRob Herringscripts_dtc: scripts_basic
141237c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
141337c8a5faSRob Herring
1414e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1415e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1416e10c4321SMasahiro Yamadaendif
1417e10c4321SMasahiro Yamada
1418c473a8d0SMasahiro YamadaPHONY += dt_binding_check
14194f0e3a57SRob Herringdt_binding_check: scripts_dtc
14204f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
14214f0e3a57SRob Herring
142237c8a5faSRob Herring# ---------------------------------------------------------------------------
14231da177e4SLinus Torvalds# Modules
14241da177e4SLinus Torvalds
14251da177e4SLinus Torvaldsifdef CONFIG_MODULES
14261da177e4SLinus Torvalds
14271da177e4SLinus Torvalds# By default, build modules as well
14281da177e4SLinus Torvalds
142973d1393eSMichal Marekall: modules
14301da177e4SLinus Torvalds
14314b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider
14324b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to
14334b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them.
14344b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS
14354b50c8c4SMasahiro Yamada  KBUILD_BUILTIN := 1
14364b50c8c4SMasahiro Yamadaendif
14374b50c8c4SMasahiro Yamada
14381da177e4SLinus Torvalds# Build modules
1439551559e1STejun Heo#
1440551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1441551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1442551559e1STejun Heo# using awk while concatenating to the final file.
14431da177e4SLinus Torvalds
14444f193362SPaul SmithPHONY += modules
1445596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
1446b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
14471da177e4SLinus Torvalds
14488451791dSMasahiro YamadaPHONY += modules_check
14498451791dSMasahiro Yamadamodules_check: modules.order
14508451791dSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
14511da177e4SLinus Torvalds
1452b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1453b2c88554SMasahiro Yamada
1454b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE
1455b2c88554SMasahiro Yamada	$(call if_changed,modules_order)
1456b2c88554SMasahiro Yamada
1457b2c88554SMasahiro Yamadatargets += modules.order
1458a6c36632SMichal Marek
14591da177e4SLinus Torvalds# Target to prepare building external modules
14604f193362SPaul SmithPHONY += modules_prepare
1461059bc9fcSMasahiro Yamadamodules_prepare: prepare
1462596b0474SMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
14631da177e4SLinus Torvalds
14641da177e4SLinus Torvalds# Target to install modules
14654f193362SPaul SmithPHONY += modules_install
14661da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
14671da177e4SLinus Torvalds
14684f193362SPaul SmithPHONY += _modinst_
14692c6d9636SMasahiro Yamada_modinst_:
14701da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
14711da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
14721da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
14738e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
14741da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
14751da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
14767e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
14771da177e4SLinus Torvalds	fi
14781bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
14792c6d9636SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
14802c6d9636SMasahiro Yamada	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1481b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
14821da177e4SLinus Torvalds
148350a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
14841da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
14851da177e4SLinus Torvalds# boot script depmod is the master version.
14864f193362SPaul SmithPHONY += _modinst_post
14876d128e1eSLinus Torvalds_modinst_post: _modinst_
148850a8ec31SSam Ravnborg	$(call cmd,depmod)
14891da177e4SLinus Torvalds
1490d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1491d890f510SJosh BoyerPHONY += modules_sign
1492d890f510SJosh Boyermodules_sign:
1493d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1494d890f510SJosh Boyerendif
1495d890f510SJosh Boyer
14961da177e4SLinus Torvaldselse # CONFIG_MODULES
14971da177e4SLinus Torvalds
14981da177e4SLinus Torvalds# Modules not configured
14991da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15001da177e4SLinus Torvalds
1501612e47ceSMasahiro YamadaPHONY += modules modules_install
1502612e47ceSMasahiro Yamadamodules modules_install:
15035369f550SMichal Marek	@echo >&2
15045369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
15055369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
15065369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
15075369f550SMichal Marek	@echo >&2
15081da177e4SLinus Torvalds	@exit 1
15091da177e4SLinus Torvalds
15101da177e4SLinus Torvaldsendif # CONFIG_MODULES
15111da177e4SLinus Torvalds
15121da177e4SLinus Torvalds###
15131da177e4SLinus Torvalds# Cleaning is done on three levels.
15141da177e4SLinus Torvalds# make clean     Delete most generated files
15151da177e4SLinus Torvalds#                Leave enough to build external modules
15161da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
15171da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
15181da177e4SLinus Torvalds
15191da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1520269a535cSMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers \
15213d32285fSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps \
15224c7858b9SMasahiro Yamada	       compile_commands.json .thinlto-cache
15231da177e4SLinus Torvalds
15241da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
15250663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
152646a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
15270663c68cSMasahiro Yamada		  debian snap tar-install \
15280663c68cSMasahiro Yamada		  .config .config.old .version \
152946457133SMasahiro Yamada		  Module.symvers \
1530fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1531fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
153246a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
153346a63d4bSMasahiro Yamada		  *.spec
15341da177e4SLinus Torvalds
153546457133SMasahiro Yamada# Directories & files removed with 'make distclean'
15364c7858b9SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
153746457133SMasahiro Yamada
15381da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
15391da177e4SLinus Torvalds#
15401da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
15411da177e4SLinus Torvalds
154276cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
15431da177e4SLinus Torvalds
1544bd1ee804SPawel Mollvmlinuxclean:
1545bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1546fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1547bd1ee804SPawel Moll
154850d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean
15491da177e4SLinus Torvalds
15501da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
15511da177e4SLinus Torvalds#
15521da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1553cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
15541da177e4SLinus Torvalds
1555b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
15561da177e4SLinus Torvalds$(mrproper-dirs):
15571da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
15581da177e4SLinus Torvalds
1559b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
15601da177e4SLinus Torvalds	$(call cmd,rmfiles)
15611da177e4SLinus Torvalds
15621da177e4SLinus Torvalds# distclean
15631da177e4SLinus Torvalds#
156446457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
156546457133SMasahiro Yamada
15664f193362SPaul SmithPHONY += distclean
15671da177e4SLinus Torvalds
15681da177e4SLinus Torvaldsdistclean: mrproper
156946457133SMasahiro Yamada	$(call cmd,rmfiles)
15701da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
15711da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1572f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1573f78271dfSMasahiro Yamada		-o -name 'core' \) \
15741da177e4SLinus Torvalds		-type f -print | xargs rm -f
15751da177e4SLinus Torvalds
15761da177e4SLinus Torvalds
15771da177e4SLinus Torvalds# Packaging of the kernel to various formats
15781da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15791da177e4SLinus Torvalds
1580bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1581000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1582031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1583000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
15841da177e4SLinus Torvalds
15851da177e4SLinus Torvalds# Brief documentation of the typical targets used
15861da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15871da177e4SLinus Torvalds
15885dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1589a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
15905dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
15915dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
15921da177e4SLinus Torvalds
1593fe69b420SMasahiro YamadaPHONY += help
15941da177e4SLinus Torvaldshelp:
15951da177e4SLinus Torvalds	@echo  'Cleaning targets:'
15965ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
15975cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
15985ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
15995cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
16001da177e4SLinus Torvalds	@echo  ''
16011da177e4SLinus Torvalds	@echo  'Configuration targets:'
16021da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
16031da177e4SLinus Torvalds	@echo  ''
16041da177e4SLinus Torvalds	@echo  'Other generic targets:'
16051da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
16061da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
16071da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
16089cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
16091da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
161040ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1611433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1612433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
161362718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
161462718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1615155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1616c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
16171da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
16181da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1619f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
16203f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
16213f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
16223f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
16232fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
162459df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
16252fb9b1bdSSam Ravnborg	 echo  ''
162631b8cc80SRandy Dunlap	@echo  'Static analysers:'
16271da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1628aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1629ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1630295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
163174425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
16327f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
16336ad7cbc0SNathan Huckleberry	@echo  '  clang-analyzer  - Check with clang static analyzer'
16346ad7cbc0SNathan Huckleberry	@echo  '  clang-tidy      - Check with clang-tidy'
163574425eeeSNicolas Palix	@echo  ''
1636eb8305aeSMatthias Maennich	@echo  'Tools:'
1637eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1638eb8305aeSMatthias Maennich	@echo  ''
163931b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1640e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
16415a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
16425a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1643e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1644e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1645e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1646dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1647e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1648e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
16495a5da78bSShuah Khan	@echo  ''
165037c8a5faSRob Herring	@$(if $(dtstree), \
165137c8a5faSRob Herring		echo 'Devicetree:'; \
165237c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
165337c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
16547aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
16557aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
165637c8a5faSRob Herring		echo '')
165737c8a5faSRob Herring
165831b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
165931b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
166031b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
166131b8cc80SRandy Dunlap	@echo  ''
16621da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1663000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
16641da177e4SLinus Torvalds	@echo  ''
16651da177e4SLinus Torvalds	@echo  'Documentation targets:'
1666cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
16671da177e4SLinus Torvalds	@echo  ''
166801dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
16691da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
167001dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
16711da177e4SLinus Torvalds	@echo  ''
16721da177e4SLinus Torvalds	@$(if $(boards), \
16731da177e4SLinus Torvalds		$(foreach b, $(boards), \
16744234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
16751da177e4SLinus Torvalds		echo '')
16765dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
16775dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
16785dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
16795dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
16805dffbe81SSegher Boessenkool		echo '')
16811da177e4SLinus Torvalds
16821da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
168345d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
16841da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1685a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1686a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1687701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1688af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1689e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
169028bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
169128bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
169228bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1693a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
16941da177e4SLinus Torvalds	@echo  ''
16951da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
16961da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
16971da177e4SLinus Torvalds
16981da177e4SLinus Torvalds
16995dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
17005dffbe81SSegher Boessenkool
17015dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
17025dffbe81SSegher Boessenkool
1703fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
17045dffbe81SSegher Boessenkool
17055dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
17065dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
17075dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
17085dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
17095dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
17105dffbe81SSegher Boessenkool		echo '')
17115dffbe81SSegher Boessenkool
17125dffbe81SSegher Boessenkool
17131da177e4SLinus Torvalds# Documentation targets
17141da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1715e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1716e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
171722cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1718bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1719cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
17201da177e4SLinus Torvalds
172167274c08SMasahiro Yamada# Misc
172267274c08SMasahiro Yamada# ---------------------------------------------------------------------------
172367274c08SMasahiro Yamada
172467274c08SMasahiro YamadaPHONY += scripts_gdb
17257a739ce5SMasahiro Yamadascripts_gdb: prepare0
17261e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
17278d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
172867274c08SMasahiro Yamada
172967274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
173067274c08SMasahiro Yamadaall: scripts_gdb
173167274c08SMasahiro Yamadaendif
173267274c08SMasahiro Yamada
17331da177e4SLinus Torvaldselse # KBUILD_EXTMOD
17341da177e4SLinus Torvalds
17351da177e4SLinus Torvalds###
17361da177e4SLinus Torvalds# External module support.
17371da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
17381da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
17391da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
17401da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
17411da177e4SLinus Torvalds# be used.
17421da177e4SLinus Torvalds#
17431da177e4SLinus Torvalds# The following are the only valid targets when building external
17441da177e4SLinus Torvalds# modules.
17451da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
17461da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
17471da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
17481da177e4SLinus Torvalds# make M=dir modules_install
1749070b98bfSSam Ravnborg#                      Install the modules built in the module directory
17501da177e4SLinus Torvalds#                      Assumes install directory is already created
17511da177e4SLinus Torvalds
17526212804fSMasahiro Yamada# We are always building only modules.
17536212804fSMasahiro YamadaKBUILD_BUILTIN :=
17541da177e4SLinus TorvaldsKBUILD_MODULES := 1
17551da177e4SLinus Torvalds
1756c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1757c99f3918SMasahiro YamadaPHONY += modules
17583d32285fSMasahiro Yamadamodules: $(MODORDER)
1759b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
17601da177e4SLinus Torvalds
17613d32285fSMasahiro Yamada$(MODORDER): descend
17623d32285fSMasahiro Yamada	@:
17633d32285fSMasahiro Yamada
17644f193362SPaul SmithPHONY += modules_install
1765a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1766a67dc21aSSam Ravnborg
1767a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
17684f193362SPaul SmithPHONY += _emodinst_
1769a67dc21aSSam Ravnborg_emodinst_:
1770a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1771b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
17721da177e4SLinus Torvalds
17734f193362SPaul SmithPHONY += _emodinst_post
1774a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1775a67dc21aSSam Ravnborg	$(call cmd,depmod)
1776a67dc21aSSam Ravnborg
17773d32285fSMasahiro Yamadacompile_commands.json: $(extmod-prefix)compile_commands.json
17783d32285fSMasahiro YamadaPHONY += compile_commands.json
17793d32285fSMasahiro Yamada
178076cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
17813d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1782dc5723b0SSami Tolvanen	$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
17831da177e4SLinus Torvalds
1784fe69b420SMasahiro YamadaPHONY += help
17851da177e4SLinus Torvaldshelp:
17861da177e4SLinus Torvalds	@echo  '  Building external modules.'
17871da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
17881da177e4SLinus Torvalds	@echo  ''
17891da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
17901da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
17911da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
17921da177e4SLinus Torvalds	@echo  ''
179306300b21SSam Ravnborg
1794596b0474SMasahiro Yamada# no-op for external module builds
1795596b0474SMasahiro YamadaPHONY += prepare modules_prepare
1796596b0474SMasahiro Yamada
17971da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
17981da177e4SLinus Torvalds
1799b1fbfcb4SMasahiro Yamada# Single targets
1800b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1801b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1802b1fbfcb4SMasahiro Yamada#
1803b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1804b1fbfcb4SMasahiro Yamada#
1805b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1806b1fbfcb4SMasahiro Yamada#
1807b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1808b1fbfcb4SMasahiro Yamada#
1809b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1810b1fbfcb4SMasahiro Yamada
1811b1fbfcb4SMasahiro Yamadaifdef single-build
1812b1fbfcb4SMasahiro Yamada
1813b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1814b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1815b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1816b1fbfcb4SMasahiro Yamada
1817b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1818b1fbfcb4SMasahiro Yamada	@:
1819b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1820b1fbfcb4SMasahiro Yamada	@:
1821b1fbfcb4SMasahiro Yamada
1822b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1823b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1824b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1825b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1826b1fbfcb4SMasahiro Yamadaendif
1827b1fbfcb4SMasahiro Yamada
1828b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1829596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare
1830b1fbfcb4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1831b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1832b1fbfcb4SMasahiro Yamada
1833b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1834b1fbfcb4SMasahiro Yamada
1835b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1836b1fbfcb4SMasahiro Yamada
1837b1fbfcb4SMasahiro Yamada# trim unrelated directories
1838b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1839b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1840b1fbfcb4SMasahiro Yamada
1841b1fbfcb4SMasahiro Yamadaendif
1842b1fbfcb4SMasahiro Yamada
1843b480fec9SMasahiro Yamadaifndef CONFIG_MODULES
1844b480fec9SMasahiro YamadaKBUILD_MODULES :=
1845b480fec9SMasahiro Yamadaendif
1846b480fec9SMasahiro Yamada
1847c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1848c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1849c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1850c99f3918SMasahiro Yamada# make menuconfig etc.
1851c99f3918SMasahiro Yamada# Error messages still appears in the original language
1852c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1853c99f3918SMasahiro Yamadadescend: $(build-dirs)
1854c99f3918SMasahiro Yamada$(build-dirs): prepare
1855b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
185620b1be59SMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
1857b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1858c99f3918SMasahiro Yamada
185976cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
186076cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
186176cd306dSMasahiro Yamada$(clean-dirs):
186276cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
186376cd306dSMasahiro Yamada
186488d7be03SMichal Marekclean: $(clean-dirs)
186588d7be03SMichal Marek	$(call cmd,rmfiles)
186643f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1867ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
18684f0e3a57SRob Herring		-o -name '*.ko.*' \
1869ce88c9c7SViresh Kumar		-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1870ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1871bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
187288d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
18739a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
18744fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
187588d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
18768b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
18776b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1878433db3e2SVinícius Tinti		-o -name '*.ll' \
187938e89184SSami Tolvanen		-o -name '*.gcno' \
188038e89184SSami Tolvanen		-o -name '*.*.symversions' \) -type f -print | xargs rm -f
188188d7be03SMichal Marek
18821da177e4SLinus Torvalds# Generate tags for editors
18831da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1884a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1885858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
18861da177e4SLinus Torvalds
1887f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
18881da177e4SLinus Torvalds	$(call cmd,tags)
18891da177e4SLinus Torvalds
1890eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1891eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1892eb8305aeSMatthias Maennich
1893eb8305aeSMatthias MaennichPHONY += nsdeps
1894bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1895eb8305aeSMatthias Maennichnsdeps: modules
1896bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1897eb8305aeSMatthias Maennich
18983d32285fSMasahiro Yamada# Clang Tooling
18993d32285fSMasahiro Yamada# ---------------------------------------------------------------------------
19003d32285fSMasahiro Yamada
19013d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN     $@
19023d32285fSMasahiro Yamada      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
19033d32285fSMasahiro Yamada
19046ad7cbc0SNathan Huckleberry$(extmod-prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
19053d32285fSMasahiro Yamada	$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
19063d32285fSMasahiro Yamada	$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
19073d32285fSMasahiro Yamada	$(call if_changed,gen_compile_commands)
19083d32285fSMasahiro Yamada
19093d32285fSMasahiro Yamadatargets += $(extmod-prefix)compile_commands.json
19103d32285fSMasahiro Yamada
19116ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer
19126ad7cbc0SNathan Huckleberry
19136ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG
19146ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK   $<
19156ad7cbc0SNathan Huckleberry      cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
19166ad7cbc0SNathan Huckleberry
19176ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer: $(extmod-prefix)compile_commands.json
19186ad7cbc0SNathan Huckleberry	$(call cmd,clang_tools)
19196ad7cbc0SNathan Huckleberryelse
19206ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer:
19216ad7cbc0SNathan Huckleberry	@echo "$@ requires CC=clang" >&2
19226ad7cbc0SNathan Huckleberry	@false
19236ad7cbc0SNathan Huckleberryendif
19246ad7cbc0SNathan Huckleberry
19251da177e4SLinus Torvalds# Scripts to check various things for consistency
19261da177e4SLinus Torvalds# ---------------------------------------------------------------------------
19271da177e4SLinus Torvalds
19287dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report
1929279f3dd3SPeter Foley
19301da177e4SLinus Torvaldsincludecheck:
1931436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19321da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
193380007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
19341da177e4SLinus Torvalds
19351da177e4SLinus Torvaldsversioncheck:
19362ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
19371da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
193880007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
19391da177e4SLinus Torvalds
194074425eeeSNicolas Palixcoccicheck:
1941858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
194274425eeeSNicolas Palix
1943295ac051SAdrian Bunkexport_report:
1944295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1945295ac051SAdrian Bunk
1946c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1947e3ccf6e3SJeff Dike
1948011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1949011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1950011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1951011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1952011e3a9aSJeff Dikeifeq ($(ARCH), um)
1953011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1954011e3a9aSJeff Dikeelse
1955011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1956011e3a9aSJeff Dikeendif
19571da177e4SLinus Torvaldscheckstack:
19581da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
195975dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
19601da177e4SLinus Torvalds
19617b8ea53dSAmerigo Wangkernelrelease:
19627b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
196301ab1788SAmerigo Wang
1964cb58455cSSam Ravnborgkernelversion:
19652244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
19661da177e4SLinus Torvalds
1967c398ff00SMike Marciniszynimage_name:
1968c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1969c398ff00SMike Marciniszyn
1970ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1971f47a23ceSMasahiro Yamada
1972f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1973f47a23ceSMasahiro Yamadatools_silent=s
1974f47a23ceSMasahiro Yamadaendif
1975f47a23ceSMasahiro Yamada
1976ea01fa9fSBorislav Petkovtools/: FORCE
1977bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
197875dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1979ea01fa9fSBorislav Petkov
1980ea01fa9fSBorislav Petkovtools/%: FORCE
1981bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
198275dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1983ea01fa9fSBorislav Petkov
19841da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
19850663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
19861da177e4SLinus Torvalds
1987bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
198850a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1989569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
19905a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
199150a8ec31SSam Ravnborg
1992392885eeSMasahiro Yamada# read saved command lines for existing targets
1993392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
19941da177e4SLinus Torvalds
1995b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
19961da177e4SLinus Torvalds
199746b7c492SSZ Lin (林上智)endif # config-build
19982042b548SMasahiro Yamadaendif # mixed-build
1999688931a5SMasahiro Yamadaendif # need-sub-make
20001da177e4SLinus Torvalds
20014f193362SPaul SmithPHONY += FORCE
20021da177e4SLinus TorvaldsFORCE:
20034f193362SPaul Smith
2004bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
2005fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
20064f193362SPaul Smith.PHONY: $(PHONY)
2007