xref: /openbmc/linux/Makefile (revision a5139fb368d2639afc6a3ea7e444f22a3e8ed3be)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
35f9e832cSLinus TorvaldsPATCHLEVEL = 3
455922c9dSLinus TorvaldsSUBLEVEL = 0
5d45331b0SLinus TorvaldsEXTRAVERSION = -rc4
66fbc7275SLinus TorvaldsNAME = Bobtail Squid
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
14ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
15ba634eceSMasahiro YamadaPHONY := _all
16ba634eceSMasahiro Yamada_all:
17ba634eceSMasahiro Yamada
181da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
191da177e4SLinus Torvalds# to get the ordering right.
201da177e4SLinus Torvalds#
211da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
221da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
231da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
24f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
251da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
261da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
271da177e4SLinus Torvalds# is now up to date.
281da177e4SLinus Torvalds#
291da177e4SLinus Torvalds# The only cases where we need to modify files which have global
301da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
311da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
321da177e4SLinus Torvalds# prepare rule.
331da177e4SLinus Torvalds
34221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
353812b8c5SMasahiro Yamada
363812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
373812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
383812b8c5SMasahiro YamadaMAKEFLAGS += -rR
393812b8c5SMasahiro Yamada
403812b8c5SMasahiro Yamada# Avoid funny character set dependencies
413812b8c5SMasahiro Yamadaunexport LC_ALL
423812b8c5SMasahiro YamadaLC_COLLATE=C
433812b8c5SMasahiro YamadaLC_NUMERIC=C
443812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
453812b8c5SMasahiro Yamada
463812b8c5SMasahiro Yamada# Avoid interference with shell env settings
473812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
483812b8c5SMasahiro Yamada
49066b7ed9SMichal Marek# Beautify output
50066b7ed9SMichal Marek# ---------------------------------------------------------------------------
51066b7ed9SMichal Marek#
52066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
53066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
54066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
55066b7ed9SMichal Marek#
56066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
57066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
58066b7ed9SMichal Marek#
59066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
60066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
61066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
62066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
63066b7ed9SMichal Marek#
64066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
65066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
66066b7ed9SMichal Marek#
67066b7ed9SMichal Marek#	$(Q)ln $@ :<
68066b7ed9SMichal Marek#
69066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
70066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
71066b7ed9SMichal Marek#
721da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
731da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
741da177e4SLinus Torvalds
751da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
761da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
771da177e4SLinus Torvaldsendif
781da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
791da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
801da177e4SLinus Torvaldsendif
811da177e4SLinus Torvalds
82066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
83066b7ed9SMichal Marek  quiet =
84066b7ed9SMichal Marek  Q =
85066b7ed9SMichal Marekelse
86066b7ed9SMichal Marek  quiet=quiet_
87066b7ed9SMichal Marek  Q = @
88066b7ed9SMichal Marekendif
89066b7ed9SMichal Marek
90066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
91066b7ed9SMichal Marek# commands
92066b7ed9SMichal Marek
936f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
94066b7ed9SMichal Marek  quiet=silent_
95066b7ed9SMichal Marekendif
96066b7ed9SMichal Marek
97066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
98066b7ed9SMichal Marek
9925b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
10025b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
10125b146c5SMasahiro Yamada#
10225b146c5SMasahiro Yamada# For example, you can do this:
10325b146c5SMasahiro Yamada#
10425b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
10525b146c5SMasahiro Yamada#
10625b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
10725b146c5SMasahiro Yamada# two syntaxes to specify it.
10825b146c5SMasahiro Yamada#
1091da177e4SLinus Torvalds# 1) O=
1101da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1111da177e4SLinus Torvalds#
1121da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
11325b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
11425b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1151da177e4SLinus Torvalds#
1161da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1171da177e4SLinus Torvalds# variable.
1181da177e4SLinus Torvalds
11925b146c5SMasahiro Yamada# Do we want to change the working directory?
1201da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1211da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1221da177e4SLinus Torvaldsendif
1231da177e4SLinus Torvalds
12425b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
12525b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
12625b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
12725b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
12825b146c5SMasahiro Yamada$(if $(abs_objtree),, \
12925b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
13025b146c5SMasahiro Yamada
13125b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
13225b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
13325b146c5SMasahiro Yamadaelse
13425b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
13525b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
13625b146c5SMasahiro Yamada
13725b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
13825b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
13925b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
14025b146c5SMasahiro Yamadaelse
14125b146c5SMasahiro Yamadaneed-sub-make := 1
14251193b76SRobert Jarzmikendif
14351193b76SRobert Jarzmik
14425b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
1451da177e4SLinus Torvalds
14625b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
14725b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
14825b146c5SMasahiro Yamadaendif
14925b146c5SMasahiro Yamada
15025b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
15180463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
15280463f1bSMasahiro Yamada#
15380463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
15425b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
15525b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
156688931a5SMasahiro Yamadaneed-sub-make := 1
15725b146c5SMasahiro Yamadaendif
1583812b8c5SMasahiro Yamada
159688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
160688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
161688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
162688931a5SMasahiro Yamadaneed-sub-make := 1
163688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
164688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ;
165688931a5SMasahiro Yamadaendif
166688931a5SMasahiro Yamada
16725b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
168221cc2d2SMasahiro Yamadaexport sub_make_done := 1
169221cc2d2SMasahiro Yamada
170688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
171688931a5SMasahiro Yamada
1720b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
1730b35786dSMilton Miller
1740209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
17516f89098SCharles Keepax	@:
1760b35786dSMilton Miller
177c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
1782e8d696bSMasahiro Yamadasub-make:
17925b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
1801da177e4SLinus Torvalds
181688931a5SMasahiro Yamadaendif # need-sub-make
182221cc2d2SMasahiro Yamadaendif # sub_make_done
183688931a5SMasahiro Yamada
1841da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
185688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
1861da177e4SLinus Torvalds
1877ff52571SMasahiro Yamada# Do not print "Entering directory ...",
1887ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
1897ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
1907ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
1917ff52571SMasahiro Yamada
192aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
193aa55c8e2SMasahiro Yamada# C compilation.
194aa55c8e2SMasahiro Yamada#
195aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
196aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
197aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
198aa55c8e2SMasahiro Yamada#
199036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
200036db11cSCao jin# including where to get the "sparse" utility.
201aa55c8e2SMasahiro Yamada
202aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
203aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
204aa55c8e2SMasahiro Yamadaendif
205aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
206aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
207aa55c8e2SMasahiro Yamadaendif
208aa55c8e2SMasahiro Yamada
209aa55c8e2SMasahiro Yamada# Use make M=dir to specify directory of external module to build
210aa55c8e2SMasahiro Yamada# Old syntax make ... SUBDIRS=$PWD is still supported
211aa55c8e2SMasahiro Yamada# Setting the environment variable KBUILD_EXTMOD take precedence
212aa55c8e2SMasahiro Yamadaifdef SUBDIRS
2130126be38SMasahiro Yamada  $(warning ================= WARNING ================)
2140126be38SMasahiro Yamada  $(warning 'SUBDIRS' will be removed after Linux 5.3)
2154e8fc3f5SMasahiro Yamada  $(warning )
2164e8fc3f5SMasahiro Yamada  $(warning If you are building an individual subdirectory)
2174e8fc3f5SMasahiro Yamada  $(warning in the kernel tree, you can do like this:)
2184e8fc3f5SMasahiro Yamada  $(warning $$ make path/to/dir/you/want/to/build/)
2194e8fc3f5SMasahiro Yamada  $(warning (Do not forget the trailing slash))
2204e8fc3f5SMasahiro Yamada  $(warning )
2214e8fc3f5SMasahiro Yamada  $(warning If you are building an external module,)
2220126be38SMasahiro Yamada  $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead)
2230126be38SMasahiro Yamada  $(warning ==========================================)
224aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD ?= $(SUBDIRS)
225aa55c8e2SMasahiro Yamadaendif
226aa55c8e2SMasahiro Yamada
227aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
228aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
229aa55c8e2SMasahiro Yamadaendif
230aa55c8e2SMasahiro Yamada
231051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD
232051f278eSMasahiro Yamada
233394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
234394053f4SMasahiro Yamada
23525b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
2369da0763bSMichal Marek        # building in the source tree
2379da0763bSMichal Marek        srctree := .
238051f278eSMasahiro Yamada	building_out_of_srctree :=
2399da0763bSMichal Marekelse
24025b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
2419da0763bSMichal Marek                # building in a subdirectory of the source tree
2429da0763bSMichal Marek                srctree := ..
2439da0763bSMichal Marek        else
24425b146c5SMasahiro Yamada                srctree := $(abs_srctree)
2459da0763bSMichal Marek        endif
246051f278eSMasahiro Yamada	building_out_of_srctree := 1
2479da0763bSMichal Marekendif
2482c1f4f12SMasahiro Yamada
24995fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
25095fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
25195fd3f87SMasahiro Yamadaendif
2522c1f4f12SMasahiro Yamada
2537e1c0477SMichal Marekobjtree		:= .
2546b12de69SMasahiro YamadaVPATH		:= $(srctree)
2551da177e4SLinus Torvalds
256051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
2571da177e4SLinus Torvalds
2582c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2592c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2602c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2612c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2622c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2632c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2642c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2652c1f4f12SMasahiro Yamada
2662c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2672c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
2682c1f4f12SMasahiro Yamada
26922340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
27022340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2712c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
27259b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
27363e31a67SMasahiro Yamada			 %asm-generic kernelversion %src-pkg
274a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \
275a29d4d8cSMasahiro Yamada			   kernelrelease
276394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
2772c1f4f12SMasahiro Yamada
2782042b548SMasahiro Yamadaconfig-build	:=
2792042b548SMasahiro Yamadamixed-build	:=
2802042b548SMasahiro Yamadaneed-config	:= 1
281d7942413SMasahiro Yamadamay-sync-config	:= 1
282394053f4SMasahiro Yamadasingle-build	:=
2832c1f4f12SMasahiro Yamada
2842c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2852c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2862042b548SMasahiro Yamada		need-config :=
2872c1f4f12SMasahiro Yamada	endif
2882c1f4f12SMasahiro Yamadaendif
2892c1f4f12SMasahiro Yamada
290d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
291d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
2922042b548SMasahiro Yamada		may-sync-config :=
293d7942413SMasahiro Yamada	endif
294d7942413SMasahiro Yamadaendif
295d7942413SMasahiro Yamada
296d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
2972042b548SMasahiro Yamada	may-sync-config :=
298d7942413SMasahiro Yamadaendif
299d7942413SMasahiro Yamada
3002c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
3012c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
3022042b548SMasahiro Yamada		config-build := 1
3032c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
3042042b548SMasahiro Yamada			mixed-build := 1
3052c1f4f12SMasahiro Yamada                endif
3062c1f4f12SMasahiro Yamada        endif
3072c1f4f12SMasahiro Yamadaendif
30822340a06SMasahiro Yamada
309394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
310394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
311394053f4SMasahiro Yamada	single-build := 1
312394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
313394053f4SMasahiro Yamada		mixed-build := 1
314394053f4SMasahiro Yamada	endif
315394053f4SMasahiro Yamadaendif
316394053f4SMasahiro Yamada
31722340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
31822340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
31922340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3202042b548SMasahiro Yamada		mixed-build := 1
32122340a06SMasahiro Yamada        endif
32222340a06SMasahiro Yamadaendif
32322340a06SMasahiro Yamada
3242c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3252c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3262c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3272042b548SMasahiro Yamada		mixed-build := 1
3282c1f4f12SMasahiro Yamada        endif
3292c1f4f12SMasahiro Yamadaendif
3302c1f4f12SMasahiro Yamada
3312042b548SMasahiro Yamadaifdef mixed-build
3322c1f4f12SMasahiro Yamada# ===========================================================================
3332c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3342c1f4f12SMasahiro Yamada# Handle them one by one.
3352c1f4f12SMasahiro Yamada
3362c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3372c1f4f12SMasahiro Yamada
3382c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
3392c1f4f12SMasahiro Yamada	@:
3402c1f4f12SMasahiro Yamada
3412c1f4f12SMasahiro Yamada__build_one_by_one:
3422c1f4f12SMasahiro Yamada	$(Q)set -e; \
3432c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3442c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3452c1f4f12SMasahiro Yamada	done
3462c1f4f12SMasahiro Yamada
3472042b548SMasahiro Yamadaelse # !mixed-build
3482c1f4f12SMasahiro Yamada
3492c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
3502c1f4f12SMasahiro Yamada
3512c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3522c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3532c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3542c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3552c1f4f12SMasahiro Yamada
356b2d35fa5SAnders Roxellinclude scripts/subarch.include
3571da177e4SLinus Torvalds
3581da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3591da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3601da177e4SLinus Torvalds#
3611da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3621da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3631da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3641da177e4SLinus Torvalds# make ARCH=ia64
3651da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3661da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3671da177e4SLinus Torvalds
3681da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3691da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3701da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3711da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3721da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3731da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3741da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3751da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3762331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3771da177e4SLinus Torvalds
3781da177e4SLinus Torvalds# Architecture as present in compile.h
3791da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3806752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3811da177e4SLinus Torvalds
382d746d647SSam Ravnborg# Additional ARCH settings for x86
383d746d647SSam Ravnborgifeq ($(ARCH),i386)
384d746d647SSam Ravnborg        SRCARCH := x86
385d746d647SSam Ravnborgendif
386d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
387d746d647SSam Ravnborg        SRCARCH := x86
388d746d647SSam Ravnborgendif
38974b469f2SSam Ravnborg
3905e538790SSam Ravnborg# Additional ARCH settings for sparc
391e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
392e69f58c0SNamhyung Kim       SRCARCH := sparc
393e69f58c0SNamhyung Kimendif
394a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
3955e538790SSam Ravnborg       SRCARCH := sparc
396a439fe51SSam Ravnborgendif
3972fb9b1bdSSam Ravnborg
3983cc000b5SPaul Mundt# Additional ARCH settings for sh
3993cc000b5SPaul Mundtifeq ($(ARCH),sh64)
4003cc000b5SPaul Mundt       SRCARCH := sh
4013cc000b5SPaul Mundtendif
4023cc000b5SPaul Mundt
40314cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
40441263fc6SBen Gardinerexport KCONFIG_CONFIG
40514cdd3c4SRoman Zippel
4061da177e4SLinus Torvalds# SHELL used by kbuild
4071da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
4081da177e4SLinus Torvalds	  else if [ -x /bin/bash ]; then echo /bin/bash; \
4091da177e4SLinus Torvalds	  else echo sh; fi ; fi)
4101da177e4SLinus Torvalds
4116d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
4126d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4136d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
414d7f14c66SUwe Kleine-König
4151da177e4SLinus TorvaldsHOSTCC       = gcc
4161da177e4SLinus TorvaldsHOSTCXX      = g++
41796f14fe7SLaura AbbottKBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
418f92d19e0SLaura Abbott		-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
419f92d19e0SLaura Abbott		$(HOSTCFLAGS)
420f92d19e0SLaura AbbottKBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
421f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
422f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4231da177e4SLinus Torvalds
4241da177e4SLinus Torvalds# Make variables (CC, etc...)
4251da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
4261da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
4271da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
4281da177e4SLinus TorvaldsCPP		= $(CC) -E
4291da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4301da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4311da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
4321da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4331da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
4347bac9870SVasily GorbikOBJSIZE		= $(CROSS_COMPILE)size
435e83b9f55SAndrii NakryikoPAHOLE		= pahole
43673a4f6dbSMasahiro YamadaLEX		= flex
43773a4f6dbSMasahiro YamadaYACC		= bison
4381da177e4SLinus TorvaldsAWK		= awk
439caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
4401da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
4411da177e4SLinus TorvaldsPERL		= perl
442011bf125SMasahiro YamadaPYTHON		= python
443e9781b52SMasahiro YamadaPYTHON2		= python2
444e9781b52SMasahiro YamadaPYTHON3		= python3
4451da177e4SLinus TorvaldsCHECK		= sparse
4461da177e4SLinus Torvalds
44780a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4486c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4490c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4506588169dSSam RavnborgCFLAGS_MODULE   =
4516588169dSSam RavnborgAFLAGS_MODULE   =
4526588169dSSam RavnborgLDFLAGS_MODULE  =
4531da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4541da177e4SLinus TorvaldsAFLAGS_KERNEL	=
455b36fad65SMichal MarekLDFLAGS_vmlinux =
4561da177e4SLinus Torvalds
457abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
458abbf1590SDavid HowellsUSERINCLUDE    := \
4599d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4609d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
461abbf1590SDavid Howells		-I$(srctree)/include/uapi \
4623308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
463abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
464abbf1590SDavid Howells
4651da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
4661da177e4SLinus Torvalds# Needed to be compatible with the O= option
467abbf1590SDavid HowellsLINUXINCLUDE    := \
4689d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
4699d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
470051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
471f8224f7fSMasahiro Yamada		-I$(objtree)/include \
472f8224f7fSMasahiro Yamada		$(USERINCLUDE)
4731da177e4SLinus Torvalds
47442a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
475eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
47642a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
477b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
47851b97e35SKirill A. Shutemov		   -Wno-format-security \
479433dc2ebSMasahiro Yamada		   -std=gnu89
480433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
48180c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
48280c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
4836588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
4846588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
48510df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
48610df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
487d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
488433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
4895241ab4cSMasahiro YamadaCLANG_FLAGS :=
4901da177e4SLinus Torvalds
49196f14fe7SLaura Abbottexport ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
4927bac9870SVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL
4937bac9870SVasily Gorbikexport PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
4947bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
4951da177e4SLinus Torvalds
496d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
4970e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
4980e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
499222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
5006588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
50180c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
50240df759eSMichal Marekexport KBUILD_ARFLAGS
5031da177e4SLinus Torvalds
5041da177e4SLinus Torvalds# Files to ignore in find ... statements
5051da177e4SLinus Torvalds
506ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
507ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
508ae63b2d7SPrarit Bhargava			  -prune -o
509450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
510450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
5111da177e4SLinus Torvalds
5121da177e4SLinus Torvalds# ===========================================================================
5131da177e4SLinus Torvalds# Rules shared between *config targets and build targets
5141da177e4SLinus Torvalds
515312a3d09SCao jin# Basic helpers built in scripts/basic/
5164f193362SPaul SmithPHONY += scripts_basic
5171da177e4SLinus Torvaldsscripts_basic:
5181da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
519638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
5201da177e4SLinus Torvalds
5214f193362SPaul SmithPHONY += outputmakefile
522e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
523fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
524fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
525fd5f0cd6SJan Beulich# output directory.
5263a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5273a51ff34SVladimir Kondratiev# ignore whole output directory
5281da177e4SLinus Torvaldsoutputmakefile:
529051f278eSMasahiro Yamadaifdef building_out_of_srctree
530e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
531e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
532e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
533e8e83a23SMasahiro Yamada		echo >&2 "***"; \
534e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
535e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
536e8e83a23SMasahiro Yamada		echo >&2 "***"; \
537e8e83a23SMasahiro Yamada		false; \
538e8e83a23SMasahiro Yamada	fi
53992979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5404fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
541156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
542156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
543fd5f0cd6SJan Beulichendif
5441da177e4SLinus Torvalds
54599516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
546ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
5475241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
548ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
549238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)
550ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
551ae6b289aSChris Friesendif
552ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
553238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
554ae6b289aSChris Friesendif
555876a0600SNathan Chancellorifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),)
556238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
557876a0600SNathan Chancellorendif
558589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
559238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
560238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
5613bd98050SJoel Stanleyexport CLANG_FLAGS
562ae6b289aSChris Friesendif
563ae6b289aSChris Fries
564315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
565315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
566315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
567315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
568902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
569315bab4eSMasahiro Yamada
5702042b548SMasahiro Yamadaifdef config-build
5711da177e4SLinus Torvalds# ===========================================================================
5721da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
5731da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
5741da177e4SLinus Torvalds
5751da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
5761da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
5771da177e4SLinus Torvalds# used for 'make defconfig'
578a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
579315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
5801da177e4SLinus Torvalds
58131110ebbSSam Ravnborgconfig: scripts_basic outputmakefile FORCE
58231110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
58331110ebbSSam Ravnborg
58431110ebbSSam Ravnborg%config: scripts_basic outputmakefile FORCE
5851da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
5861da177e4SLinus Torvalds
5872042b548SMasahiro Yamadaelse #!config-build
5881da177e4SLinus Torvalds# ===========================================================================
5891da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
5901da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
5911da177e4SLinus Torvalds
5922c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
5932c1f4f12SMasahiro Yamada# but instead _all depend on modules
5942c1f4f12SMasahiro YamadaPHONY += all
5952c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
5962c1f4f12SMasahiro Yamada_all: all
5972c1f4f12SMasahiro Yamadaelse
5982c1f4f12SMasahiro Yamada_all: modules
5992c1f4f12SMasahiro Yamadaendif
6002c1f4f12SMasahiro Yamada
6012c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
6022c1f4f12SMasahiro Yamada# Normally, just do built-in.
6032c1f4f12SMasahiro Yamada
6042c1f4f12SMasahiro YamadaKBUILD_MODULES :=
6052c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
6062c1f4f12SMasahiro Yamada
6072c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
6082c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider
6092c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to
6102c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them.
6112c1f4f12SMasahiro Yamada
6122c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
6132c1f4f12SMasahiro Yamada  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
6142c1f4f12SMasahiro Yamadaendif
6152c1f4f12SMasahiro Yamada
6162c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
6172c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
6182c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
6192c1f4f12SMasahiro Yamada
6202c1f4f12SMasahiro Yamadaifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
6212c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6222c1f4f12SMasahiro Yamadaendif
6232c1f4f12SMasahiro Yamada
6242c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6252c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6262c1f4f12SMasahiro Yamadaendif
6272c1f4f12SMasahiro Yamada
6282c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6292c1f4f12SMasahiro Yamada
6302042b548SMasahiro Yamadaifdef need-config
631d93a18f2SMasahiro Yamadainclude include/config/auto.conf
632d93a18f2SMasahiro Yamadaendif
633d93a18f2SMasahiro Yamada
6341da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6351da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
6361da177e4SLinus Torvaldsinit-y		:= init/
637f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
638d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
63943c78d88SMasahiro Yamadadrivers-$(CONFIG_KERNEL_HEADER_TEST) += include/
6401da177e4SLinus Torvaldsnet-y		:= net/
6411da177e4SLinus Torvaldslibs-y		:= lib/
6421da177e4SLinus Torvaldscore-y		:= usr/
64337d9fe47SFeng Wuvirt-y		:= virt/
6441da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6451da177e4SLinus Torvalds
646315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
647315bab4eSMasahiro Yamada# command line.
648315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
649315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
650315bab4eSMasahiro Yamadaall: vmlinux
651315bab4eSMasahiro Yamada
652315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
653315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
654315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
6555aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
656315bab4eSMasahiro Yamada
657b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
658b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
659b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
660b1f4ff74SPaulo Zanoniendif
661b1f4ff74SPaulo Zanoni
662669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
663669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
664669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
665669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
666669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
667669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
668669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
669669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
670669e06b1SMasahiro Yamada
671315bab4eSMasahiro Yamada# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
672315bab4eSMasahiro Yamada# values of the respective KBUILD_* variables
673315bab4eSMasahiro YamadaARCH_CPPFLAGS :=
674315bab4eSMasahiro YamadaARCH_AFLAGS :=
675315bab4eSMasahiro YamadaARCH_CFLAGS :=
676315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
677315bab4eSMasahiro Yamada
6782042b548SMasahiro Yamadaifdef need-config
6792042b548SMasahiro Yamadaifdef may-sync-config
680315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
681315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
682315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
683d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
6841da177e4SLinus Torvalds
68505850719SMasahiro Yamada$(KCONFIG_CONFIG):
68605850719SMasahiro Yamada	@echo >&2 '***'
68705850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
68805850719SMasahiro Yamada	@echo >&2 '***'
68905850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
69005850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
69105850719SMasahiro Yamada	@echo >&2 '***'
69205850719SMasahiro Yamada	@/bin/false
6931da177e4SLinus Torvalds
69461277981SUlf Magnusson# The actual configuration files used during the build are stored in
69561277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
69661277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
6979390dff6SMasahiro Yamada#
6989390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
6999390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
7009390dff6SMasahiro Yamada%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
701911a91c3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
7022042b548SMasahiro Yamadaelse # !may-sync-config
703d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
704d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
705d7942413SMasahiro Yamada# Use auto.conf to trigger the test
7069ee4e336SSam RavnborgPHONY += include/config/auto.conf
7079ee4e336SSam Ravnborg
7089ee4e336SSam Ravnborginclude/config/auto.conf:
709264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
7105369f550SMichal Marek	echo >&2;							\
7115369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
7125369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
7135369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
7145369f550SMichal Marek	echo >&2 ;							\
7159ee4e336SSam Ravnborg	/bin/false)
7169ee4e336SSam Ravnborg
717d7942413SMasahiro Yamadaendif # may-sync-config
7182042b548SMasahiro Yamadaendif # need-config
7191da177e4SLinus Torvalds
720a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
721ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
722bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
723bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7246f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
725a1c48bb1SGeert Uytterhoeven
7261da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
727a75bb4ebSMatthias KaehlckeKBUILD_CFLAGS	+= -Os
728815eb71eSArnd Bergmannelse
729a0f97e06SSam RavnborgKBUILD_CFLAGS   += -O2
7301da177e4SLinus Torvaldsendif
7311da177e4SLinus Torvalds
732b303c6dfSMasahiro Yamadaifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
733b303c6dfSMasahiro YamadaKBUILD_CFLAGS   += -Wno-maybe-uninitialized
734b303c6dfSMasahiro Yamadaendif
735a76bcf55SArnd Bergmann
73669102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
73769102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
73869102311SJiri Kosina
739d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov
7406b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
7416b90bd4bSEmese Revfy
7421873e870SAndi Kleenifdef CONFIG_READABLE_ASM
7431873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
7441873e870SAndi Kleen# reorder blocks reorders the control in the function
7451873e870SAndi Kleen# ipa clone creates specialized cloned functions
7461873e870SAndi Kleen# partial inlining inlines only parts of functions
7471873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
7481873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
7491873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
7501873e870SAndi Kleenendif
7511873e870SAndi Kleen
75208f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
75335bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
75435bb5b1eSAndi Kleenendif
75535bb5b1eSAndi Kleen
7562a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
757050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
758050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
7592a61f474SMasahiro Yamada
7602a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
761e06b8b98SSam Ravnborg
762076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
763a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
764a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
765a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
766cfe17c9bSMasahiro Yamada# Quiet clang warning: comparison of unsigned expression < 0 is always false
767a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-tautological-compare
768cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
769cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
770cfe17c9bSMasahiro Yamada# See modpost pattern 2
771a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
772cfe17c9bSMasahiro Yamadaelse
773cfe17c9bSMasahiro Yamada
774cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
775cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
7769df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
777cfe17c9bSMasahiro Yamadaendif
778cfe17c9bSMasahiro Yamada
7790a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
7801da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
781a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
7821da177e4SLinus Torvaldselse
7837e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
7847e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
7857e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
7867e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
7877e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
7887e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
789a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
7901da177e4SLinus Torvaldsendif
7917e9501fdSRabin Vincentendif
7921da177e4SLinus Torvalds
793709a972eSKees Cook# Initialize all stack variables with a pattern, if desired.
794709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL
795709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
796709a972eSKees Cookendif
797709a972eSKees Cook
7981e88e415SMasahiro YamadaDEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
7992062afb4SLinus Torvalds
8001da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
801866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
8029d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
803866ced95SAndi Kleenelse
8041e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
805866ced95SAndi Kleenendif
8062288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
8071da177e4SLinus Torvaldsendif
808bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
8099d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
810bfaf2dd3SAndi Kleenendif
8111da177e4SLinus Torvalds
812d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
8131e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
814e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
815d6f4ceb7SAndi Kleenendif
816d6f4ceb7SAndi Kleen
8171e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
8181e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
8191e88e415SMasahiro Yamada
820606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
82107d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
82207d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
82307d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
82407d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
82507d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
826a2546faeSSteven Rostedt  endif
8272f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8282f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8292f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8302f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8312f4df001SVasily Gorbik    endif
8322f4df001SVasily Gorbik  endif
83307d04081SVasily Gorbikendif
834a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
835f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
836f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
837f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
838a2546faeSSteven Rostedt  endif
839f28bc3c3SVasily Gorbikendif
840f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
841f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
842f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
84372441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
844cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
84572441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
84672441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
84772441cb1SSteven Rostedt	endif
84872441cb1SSteven Rostedtendif
84916444a8aSArnaldo Carvalho de Meloendif
85016444a8aSArnaldo Carvalho de Melo
85191341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
85291341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
85391341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
85491341d4bSSam Ravnborgendif
85591341d4bSSam Ravnborg
85690ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
857e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
858e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
85990ad4052SMasahiro Yamadaendif
86090ad4052SMasahiro Yamada
86143bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH
86243bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
86343bd3a95SMiroslav Benesendif
86443bd3a95SMiroslav Benes
865e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
866e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
867e8e69931SSam Ravnborg
8681da177e4SLinus Torvalds# warn about C99 declaration after statement
869a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
8701da177e4SLinus Torvalds
871a035d552SGustavo A. R. Silva# Warn about unmarked fall-throughs in switch statement.
872bfd77145SJoe PerchesKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
873a035d552SGustavo A. R. Silva
8740bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
8758289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
8760bb95f80SKees Cook
877070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
878fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
8791da177e4SLinus Torvalds
880217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
881217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
882217c3e01SStephen Rothwell
883fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
884a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
885d0115552SLinus Torvalds
88687e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this
88787e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we
88887e0d4f0SDaniel Borkmann# need to disable it here generally.
88987e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fno-merge-all-constants)
89087e0d4f0SDaniel Borkmann
89187e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine
89287e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled.
89387e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fmerge-constants)
89487e0d4f0SDaniel Borkmann
8953ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
8963ce120b1SLinus TorvaldsKBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
8973ce120b1SLinus Torvalds
8988f7f5c9fSAndi Kleen# conserve stack if available
8998f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
9008f7f5c9fSAndi Kleen
901fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
902fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
903fe7c36c7SJosh Triplett
904ea8daa7bSDaniel Wagner# enforce correct pointer usage
905ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
906ea8daa7bSDaniel Wagner
907c834f0e8SKees Cook# Require designated initializers for all marked structures
908c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
909c834f0e8SKees Cook
910a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
911a73619a8SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
912a73619a8SMasahiro Yamada
91329be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is
91429be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern
91529be86d7SSeth Forsheeifdef CONFIG_RETPOLINE
91629be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
91729be86d7SSeth Forsheeendif
91829be86d7SSeth Forshee
91940df759eSMichal Marek# use the deterministic mode of AR if available
92040df759eSMichal MarekKBUILD_ARFLAGS := $(call ar-option,D)
92140df759eSMichal Marek
922a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
923a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
924c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
925a86fe353SMasahiro Yamada
92661754c18SMichal Marek# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
92761754c18SMichal Marek# last assignments
92861754c18SMichal MarekKBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
92961754c18SMichal MarekKBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
93061754c18SMichal MarekKBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
93152bcc330SSam Ravnborg
93289ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id
93389ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id
93418991197SRoland McGrath
9355d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
936d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
9375d7d18f5SDavid Howellsendif
9385d7d18f5SDavid Howells
93914516765SLuc Van Oostenryck# insure the checker run with the right endianness
94014516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
94114516765SLuc Van Oostenryck
9421f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
9431f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
9441f2f01b1SLuc Van Oostenryck
9451da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
9461da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
9471da177e4SLinus Torvalds# set in the environment
9481da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
9491da177e4SLinus Torvalds# this default value
9501da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
9511da177e4SLinus Torvalds
9521da177e4SLinus Torvalds#
9531da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
9541da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
9551da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
9561da177e4SLinus Torvalds
9571da177e4SLinus Torvalds#
958f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
959f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
960f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
961f4d4ffc0SJason Cooper#
962f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
963f4d4ffc0SJason Cooper
964f4d4ffc0SJason Cooper#
9651da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
9661da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
967070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
9681da177e4SLinus Torvalds#
9691da177e4SLinus Torvalds
970df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
9711da177e4SLinus Torvaldsexport MODLIB
9721da177e4SLinus Torvalds
973ac031f26STheodore Ts'o#
9742ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
9752ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
9762ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
977177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
9782ea03891SSam Ravnborg
979ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
980ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
9812ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
982ac031f26STheodore Ts'oelse
9832ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
984ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
985ac031f26STheodore Ts'oelse
9862ea03891SSam Ravnborgmod_strip_cmd = true
987ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
988ac031f26STheodore Ts'oexport mod_strip_cmd
989ac031f26STheodore Ts'o
990beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
991beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
992beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
993beb50df3SBertrand Jacquin
994beb50df3SBertrand Jacquinmod_compress_cmd = true
995beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
996beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
9973d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
998beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
999beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
10003d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
1001beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
1002beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
1003beb50df3SBertrand Jacquinexport mod_compress_cmd
1004beb50df3SBertrand Jacquin
1005d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
10063ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
10073ee550f1SDavid Woodhouse
10083ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1009e2a666d5SRusty Russellelse
1010e2a666d5SRusty Russellmod_sign_cmd = true
1011e2a666d5SRusty Russellendif
1012e2a666d5SRusty Russellexport mod_sign_cmd
1013e2a666d5SRusty Russell
1014056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1015056d28d1SRolf Eike Beer
10169f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
10179f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
1018056d28d1SRolf Eike Beer		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
10199f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
10209f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
10219f0c18aeSJosh Poimboeuf  else
10229f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
10239f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
10249f0c18aeSJosh Poimboeuf  endif
10259f0c18aeSJosh Poimboeufendif
10269f0c18aeSJosh Poimboeuf
1027e00d8880SMasahiro YamadaPHONY += prepare0
1028e2a666d5SRusty Russell
1029394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
103047801c97SMasahiro Yamada
10311da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1032cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
10331da177e4SLinus Torvalds
10341da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
10351da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
103637d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
10371da177e4SLinus Torvalds
10381eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
10391eaca4b9SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
10401eaca4b9SMasahiro Yamada			$(drivers-) $(net-) $(libs-) $(virt-))))
10411da177e4SLinus Torvalds
1042c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
104376cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1044c99f3918SMasahiro Yamada
1045f49821eeSNicholas Piggininit-y		:= $(patsubst %/, %/built-in.a, $(init-y))
1046f49821eeSNicholas Piggincore-y		:= $(patsubst %/, %/built-in.a, $(core-y))
1047f49821eeSNicholas Piggindrivers-y	:= $(patsubst %/, %/built-in.a, $(drivers-y))
1048f49821eeSNicholas Pigginnet-y		:= $(patsubst %/, %/built-in.a, $(net-y))
10491da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
1050f49821eeSNicholas Pigginlibs-y2		:= $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
1051f49821eeSNicholas Pigginvirt-y		:= $(patsubst %/, %/built-in.a, $(virt-y))
10521da177e4SLinus Torvalds
10531f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1054d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
1055d151e971SMasahiro Yamada			      $(drivers-y) $(net-y) $(virt-y)
10563a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1)
105795698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
10581f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
1059312a3d09SCao jin# used by scripts/package/Makefile
1060233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
10611da177e4SLinus Torvalds
1062d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
10631da177e4SLinus Torvalds
10643fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
10653fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
10662441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
1067c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order
1068ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
106986556392SNicolas Pitre	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
10702441e78bSNicolas Pitreendif
107123121ca2SNicolas Pitre
10721f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
10731f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
10741f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
10751f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS
10761f50b80aSMasahiro Yamada  KBUILD_MODULES := 1
10771f50b80aSMasahiro Yamadaendif
10781f50b80aSMasahiro Yamada
107907a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
108007a422bbSMasahiro Yamada
108107a422bbSMasahiro Yamada$(autoksyms_h):
108207a422bbSMasahiro Yamada	$(Q)mkdir -p $(dir $@)
108307a422bbSMasahiro Yamada	$(Q)touch $@
108423121ca2SNicolas Pitre
1085fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1086fbe6e37dSNicholas Piggin
1087fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1088fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
1089d503ac53SMasahiro Yamada	$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
1090fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
10912441e78bSNicolas Pitre
10923fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
10931f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1094741f98feSSam Ravnborg
1095392885eeSMasahiro Yamadatargets := vmlinux
1096392885eeSMasahiro Yamada
10971da177e4SLinus Torvalds# The actual objects are generated when descending,
10981da177e4SLinus Torvalds# make sure no implicit rule kicks in
1099c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ;
11001da177e4SLinus Torvalds
1101ba97df45SMasahiro Yamadafilechk_kernel.release = \
11020d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
11030d0e7718SMichal Marek
110483a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
110524512795SMasahiro Yamadainclude/config/kernel.release: FORCE
11060d0e7718SMichal Marek	$(call filechk,kernel.release)
1107cb58455cSSam Ravnborg
1108d8821622SMasahiro Yamada# Additional helpers built in scripts/
1109d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1110d8821622SMasahiro Yamada# in parallel
1111d8821622SMasahiro YamadaPHONY += scripts
111260df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1113d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1114cb58455cSSam Ravnborg
11151da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
11165bb78269SSam Ravnborg# or the modules are listed in "prepare".
11175bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
11185bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
11195bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
11201da177e4SLinus Torvalds
1121*a5139fb3SMasahiro YamadaPHONY += prepare archprepare
11225bb78269SSam Ravnborg
1123*a5139fb3SMasahiro Yamadaarchprepare: archheaders archscripts scripts include/config/kernel.release outputmakefile \
112430527cefSMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
11255bb78269SSam Ravnborg
112665bba042SMasahiro Yamadaprepare0: archprepare
112760df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
11288d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
112986feeaa8SSam Ravnborg
11301da177e4SLinus Torvalds# All the preparing..
1131b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1132b9ab5ebbSJosh Poimboeuf
11332c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
11347d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
11357d0e5c20SMasahiro Yamada
11362c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
11372c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1138037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1139037fc336SMasahiro Yamada	generic=include/asm-generic
11402c1f4f12SMasahiro Yamadauapi-asm-generic:
1141037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1142037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
11432c1f4f12SMasahiro Yamada
1144b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
11453b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1146ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1147ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1148ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1149ef7cfd00SMasahiro Yamada	@false
1150ef7cfd00SMasahiro Yamadaelse
1151ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1152ef7cfd00SMasahiro Yamadaendif
1153ef7cfd00SMasahiro Yamadaendif
11541da177e4SLinus Torvalds
11551da177e4SLinus Torvalds# Generate some files
11561da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11571da177e4SLinus Torvalds
11581da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
11591da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
11601da177e4SLinus Torvalds
11611da177e4SLinus Torvaldsuts_len := 64
116263104eecSSam Ravnborgdefine filechk_utsrelease.h
11631da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
11641da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
11651da177e4SLinus Torvalds	  exit 1;                                                         \
11661da177e4SLinus Torvalds	fi;                                                               \
1167ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
11681da177e4SLinus Torvaldsendef
11691da177e4SLinus Torvalds
117063104eecSSam Ravnborgdefine filechk_version.h
1171ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
117278d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1173ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
117463104eecSSam Ravnborgendef
117563104eecSSam Ravnborg
117643fee2b2SMasahiro Yamada$(version_h): FORCE
11771da177e4SLinus Torvalds	$(call filechk,version.h)
1178223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
11791da177e4SLinus Torvalds
1180273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
118163104eecSSam Ravnborg	$(call filechk,utsrelease.h)
118263104eecSSam Ravnborg
1183179efcb4SVegard NossumPHONY += headerdep
1184179efcb4SVegard Nossumheaderdep:
11859663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
11869663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1187179efcb4SVegard Nossum
11881da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11898d730cfbSDavid Woodhouse# Kernel headers
11908d730cfbSDavid Woodhouse
1191e6883b18SSam Ravnborg#Default location for installed headers
1192e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1193e6883b18SSam Ravnborg
119459b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
119559b2bd05SMasahiro Yamada      cmd_headers_install = \
119659b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
119759b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
119859b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
11996d716275SDavid Woodhouse
12008d730cfbSDavid WoodhousePHONY += headers_install
120159b2bd05SMasahiro Yamadaheaders_install: headers
120259b2bd05SMasahiro Yamada	$(call cmd,headers_install)
12034f193362SPaul Smith
12041da177e4SLinus TorvaldsPHONY += archheaders archscripts
12051da177e4SLinus Torvalds
1206a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
12071da177e4SLinus Torvalds
120859b2bd05SMasahiro YamadaPHONY += headers
120959b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
12109d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
12112fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1212d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1213d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
12141f85712eSMike Frysinger
121568475359SDavid WoodhousePHONY += headers_check
121659b2bd05SMasahiro Yamadaheaders_check: headers
1217d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1218d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1
121968475359SDavid Woodhouse
1220e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
122159b2bd05SMasahiro Yamadaprepare: headers
1222e949f4c2SMasahiro Yamadaendif
12231da177e4SLinus Torvalds
1224257edce6SMasahiro Yamadaifdef CONFIG_HEADERS_CHECK
1225257edce6SMasahiro Yamadaall: headers_check
1226257edce6SMasahiro Yamadaendif
1227257edce6SMasahiro Yamada
1228bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1229bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1230bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1231bdd7714bSMasahiro Yamada
12321da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12335a5da78bSShuah Khan# Kernel selftest
12345a5da78bSShuah Khan
12355a5da78bSShuah KhanPHONY += kselftest
12365a5da78bSShuah Khankselftest:
12372bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
12385a5da78bSShuah Khan
1239801d2e9fSShuah KhanPHONY += kselftest-clean
1240dcb825a9SWang Longkselftest-clean:
12412bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
1242dcb825a9SWang Long
12433d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
12443d6dee7aSBamvor Jian Zhangkselftest-merge:
12453d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
12466d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
12476d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
12483e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
12493d6dee7aSBamvor Jian Zhang
12505a5da78bSShuah Khan# ---------------------------------------------------------------------------
125137c8a5faSRob Herring# Devicetree files
125237c8a5faSRob Herring
125337c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
125437c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
125537c8a5faSRob Herringendif
125637c8a5faSRob Herring
125737c8a5faSRob Herringifneq ($(dtstree),)
125837c8a5faSRob Herring
1259*a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
126037c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
126137c8a5faSRob Herring
12624f0e3a57SRob HerringPHONY += dtbs dtbs_install dt_binding_check
1263*a5139fb3SMasahiro Yamadadtbs dtbs_check: include/config/kernel.release scripts_dtc
126437c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
126537c8a5faSRob Herring
12664f0e3a57SRob Herringdtbs_check: export CHECK_DTBS=1
12674f0e3a57SRob Herringdtbs_check: dt_binding_check
12684f0e3a57SRob Herring
126937c8a5faSRob Herringdtbs_install:
127037c8a5faSRob Herring	$(Q)$(MAKE) $(dtbinst)=$(dtstree)
127137c8a5faSRob Herring
127237c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
127337c8a5faSRob Herringall: dtbs
127437c8a5faSRob Herringendif
127537c8a5faSRob Herring
127637c8a5faSRob Herringendif
127737c8a5faSRob Herring
127837c8a5faSRob HerringPHONY += scripts_dtc
127937c8a5faSRob Herringscripts_dtc: scripts_basic
128037c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
128137c8a5faSRob Herring
12824f0e3a57SRob Herringdt_binding_check: scripts_dtc
12834f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
12844f0e3a57SRob Herring
128537c8a5faSRob Herring# ---------------------------------------------------------------------------
12861da177e4SLinus Torvalds# Modules
12871da177e4SLinus Torvalds
12881da177e4SLinus Torvaldsifdef CONFIG_MODULES
12891da177e4SLinus Torvalds
12901da177e4SLinus Torvalds# By default, build modules as well
12911da177e4SLinus Torvalds
129273d1393eSMichal Marekall: modules
12931da177e4SLinus Torvalds
12941da177e4SLinus Torvalds# Build modules
1295551559e1STejun Heo#
1296551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1297551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1298551559e1STejun Heo# using awk while concatenating to the final file.
12991da177e4SLinus Torvalds
13004f193362SPaul SmithPHONY += modules
130168980b47SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin
1302b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
13033a48a919SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
13041da177e4SLinus Torvalds
1305c99f3918SMasahiro Yamadamodules.order: descend
1306c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1307a6c36632SMichal Marek
1308c99f3918SMasahiro Yamadamodbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs))
1309a6c36632SMichal Marek
131050ef0cdfSMasahiro Yamadamodules.builtin: $(modbuiltin-dirs)
1311c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
13121da177e4SLinus Torvalds
131350ef0cdfSMasahiro YamadaPHONY += $(modbuiltin-dirs)
131450ef0cdfSMasahiro Yamada# tristate.conf is not included from this Makefile. Add it as a prerequisite
131550ef0cdfSMasahiro Yamada# here to make it self-healing in case somebody accidentally removes it.
131650ef0cdfSMasahiro Yamada$(modbuiltin-dirs): include/config/tristate.conf
131750ef0cdfSMasahiro Yamada	$(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@)
13181da177e4SLinus Torvalds
13191da177e4SLinus Torvalds# Target to prepare building external modules
13204f193362SPaul SmithPHONY += modules_prepare
1321059bc9fcSMasahiro Yamadamodules_prepare: prepare
13221da177e4SLinus Torvalds
13231da177e4SLinus Torvalds# Target to install modules
13244f193362SPaul SmithPHONY += modules_install
13251da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
13261da177e4SLinus Torvalds
13274f193362SPaul SmithPHONY += _modinst_
13282da30e70SMichal Marek_modinst_:
13291da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
13301da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
13311da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
13328e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
13331da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
13341da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
13357e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
13361da177e4SLinus Torvalds	fi
13371bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
13381bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin
1339898490c0SAlexey Gladkov	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1340b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
13411da177e4SLinus Torvalds
134250a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
13431da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
13441da177e4SLinus Torvalds# boot script depmod is the master version.
13454f193362SPaul SmithPHONY += _modinst_post
13466d128e1eSLinus Torvalds_modinst_post: _modinst_
134750a8ec31SSam Ravnborg	$(call cmd,depmod)
13481da177e4SLinus Torvalds
1349d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1350d890f510SJosh BoyerPHONY += modules_sign
1351d890f510SJosh Boyermodules_sign:
1352d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1353d890f510SJosh Boyerendif
1354d890f510SJosh Boyer
13551da177e4SLinus Torvaldselse # CONFIG_MODULES
13561da177e4SLinus Torvalds
13571da177e4SLinus Torvalds# Modules not configured
13581da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13591da177e4SLinus Torvalds
1360612e47ceSMasahiro YamadaPHONY += modules modules_install
1361612e47ceSMasahiro Yamadamodules modules_install:
13625369f550SMichal Marek	@echo >&2
13635369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
13645369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
13655369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
13665369f550SMichal Marek	@echo >&2
13671da177e4SLinus Torvalds	@exit 1
13681da177e4SLinus Torvalds
13691da177e4SLinus Torvaldsendif # CONFIG_MODULES
13701da177e4SLinus Torvalds
13711da177e4SLinus Torvalds###
13721da177e4SLinus Torvalds# Cleaning is done on three levels.
13731da177e4SLinus Torvalds# make clean     Delete most generated files
13741da177e4SLinus Torvalds#                Leave enough to build external modules
13751da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
13761da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
13771da177e4SLinus Torvalds
13781da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1379b7dca6ddSMasahiro YamadaCLEAN_DIRS  += include/ksym
1380898490c0SAlexey GladkovCLEAN_FILES += modules.builtin.modinfo
13811da177e4SLinus Torvalds
13821da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1383d6fc9fcbSMasahiro YamadaMRPROPER_DIRS  += include/config include/generated          \
138446a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
138546a63d4bSMasahiro Yamada		  debian/ snap/ tar-install/
1386278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \
138746457133SMasahiro Yamada		  Module.symvers \
1388fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1389fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
139046a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
139146a63d4bSMasahiro Yamada		  *.spec
13921da177e4SLinus Torvalds
139346457133SMasahiro Yamada# Directories & files removed with 'make distclean'
139446457133SMasahiro YamadaDISTCLEAN_DIRS  +=
139546457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
139646457133SMasahiro Yamada
13971da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
13981da177e4SLinus Torvalds#
13991da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
14001da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
14011da177e4SLinus Torvalds
140276cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
14031da177e4SLinus Torvalds
1404bd1ee804SPawel Mollvmlinuxclean:
1405bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1406fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1407bd1ee804SPawel Moll
1408bd1ee804SPawel Mollclean: archclean vmlinuxclean
14091da177e4SLinus Torvalds
14101da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
14111da177e4SLinus Torvalds#
14121da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
14131da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1414cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
14151da177e4SLinus Torvalds
1416b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
14171da177e4SLinus Torvalds$(mrproper-dirs):
14181da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
14191da177e4SLinus Torvalds
1420b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
14211da177e4SLinus Torvalds	$(call cmd,rmdirs)
14221da177e4SLinus Torvalds	$(call cmd,rmfiles)
14231da177e4SLinus Torvalds
14241da177e4SLinus Torvalds# distclean
14251da177e4SLinus Torvalds#
142646457133SMasahiro Yamadadistclean: rm-dirs  := $(wildcard $(DISTCLEAN_DIRS))
142746457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
142846457133SMasahiro Yamada
14294f193362SPaul SmithPHONY += distclean
14301da177e4SLinus Torvalds
14311da177e4SLinus Torvaldsdistclean: mrproper
143246457133SMasahiro Yamada	$(call cmd,rmdirs)
143346457133SMasahiro Yamada	$(call cmd,rmfiles)
14341da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
14351da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1436f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1437f78271dfSMasahiro Yamada		-o -name 'core' \) \
14381da177e4SLinus Torvalds		-type f -print | xargs rm -f
14391da177e4SLinus Torvalds
14401da177e4SLinus Torvalds
14411da177e4SLinus Torvalds# Packaging of the kernel to various formats
14421da177e4SLinus Torvalds# ---------------------------------------------------------------------------
14431da177e4SLinus Torvalds
1444bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1445000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1446031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1447000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
14481da177e4SLinus Torvalds
14491da177e4SLinus Torvalds# Brief documentation of the typical targets used
14501da177e4SLinus Torvalds# ---------------------------------------------------------------------------
14511da177e4SLinus Torvalds
14525dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1453a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
14545dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
14555dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
14561da177e4SLinus Torvalds
1457fe69b420SMasahiro YamadaPHONY += help
14581da177e4SLinus Torvaldshelp:
14591da177e4SLinus Torvalds	@echo  'Cleaning targets:'
14605ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
14615cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
14625ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
14635cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
14641da177e4SLinus Torvalds	@echo  ''
14651da177e4SLinus Torvalds	@echo  'Configuration targets:'
14661da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
14671da177e4SLinus Torvalds	@echo  ''
14681da177e4SLinus Torvalds	@echo  'Other generic targets:'
14691da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
14701da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
14711da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
14729cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
14731da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
147440ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1475433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1476433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
147762718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
147862718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1479155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1480c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
14811da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
14821da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1483f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
14843f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
14853f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
14863f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
14872fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
148859df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
14892fb9b1bdSSam Ravnborg	 echo  ''
149031b8cc80SRandy Dunlap	@echo  'Static analysers:'
14911da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
14921da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1493aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1494ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1495295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1496179efcb4SVegard Nossum	@echo  '  headers_check   - Sanity check on exported headers'
149774425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
14987f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
149974425eeeSNicolas Palix	@echo  ''
150031b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
15015a5da78bSShuah Khan	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
15025a5da78bSShuah Khan	@echo  '                    Build, install, and boot kernel before'
15035a5da78bSShuah Khan	@echo  '                    running kselftest on it'
1504dcb825a9SWang Long	@echo  '  kselftest-clean - Remove all generated kselftest files'
1505bbfe63b6SRandy Dunlap	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existing'
15063d6dee7aSBamvor Jian Zhang	@echo  '                    .config.'
15075a5da78bSShuah Khan	@echo  ''
150837c8a5faSRob Herring	@$(if $(dtstree), \
150937c8a5faSRob Herring		echo 'Devicetree:'; \
151037c8a5faSRob Herring		echo '* dtbs            - Build device tree blobs for enabled boards'; \
151137c8a5faSRob Herring		echo '  dtbs_install    - Install dtbs to $(INSTALL_DTBS_PATH)'; \
151237c8a5faSRob Herring		echo '')
151337c8a5faSRob Herring
151431b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
151531b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
151631b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
151731b8cc80SRandy Dunlap	@echo  ''
15181da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1519000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
15201da177e4SLinus Torvalds	@echo  ''
15211da177e4SLinus Torvalds	@echo  'Documentation targets:'
1522cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
15231da177e4SLinus Torvalds	@echo  ''
152401dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
15251da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
152601dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
15271da177e4SLinus Torvalds	@echo  ''
15281da177e4SLinus Torvalds	@$(if $(boards), \
15291da177e4SLinus Torvalds		$(foreach b, $(boards), \
15301da177e4SLinus Torvalds		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
15311da177e4SLinus Torvalds		echo '')
15325dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
15335dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
15345dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
15355dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
15365dffbe81SSegher Boessenkool		echo '')
15371da177e4SLinus Torvalds
15381da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
153945d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
15401da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
15419ba26a72SCao jin	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1542701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1543af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
154428bc20dcSSam Ravnborg	@echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
154528bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
154628bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
154728bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1548a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
15491da177e4SLinus Torvalds	@echo  ''
15501da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
15511da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
15521da177e4SLinus Torvalds
15531da177e4SLinus Torvalds
15545dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
15555dffbe81SSegher Boessenkool
15565dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
15575dffbe81SSegher Boessenkool
1558fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
15595dffbe81SSegher Boessenkool
15605dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
15615dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
15625dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
15635dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
15645dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
15655dffbe81SSegher Boessenkool		echo '')
15665dffbe81SSegher Boessenkool
15675dffbe81SSegher Boessenkool
15681da177e4SLinus Torvalds# Documentation targets
15691da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1570e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1571e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
157222cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1573bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1574cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
15751da177e4SLinus Torvalds
157667274c08SMasahiro Yamada# Misc
157767274c08SMasahiro Yamada# ---------------------------------------------------------------------------
157867274c08SMasahiro Yamada
157967274c08SMasahiro YamadaPHONY += scripts_gdb
15807a739ce5SMasahiro Yamadascripts_gdb: prepare0
15811e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
15828d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
158367274c08SMasahiro Yamada
158467274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
158567274c08SMasahiro Yamadaall: scripts_gdb
158667274c08SMasahiro Yamadaendif
158767274c08SMasahiro Yamada
15881da177e4SLinus Torvaldselse # KBUILD_EXTMOD
15891da177e4SLinus Torvalds
15901da177e4SLinus Torvalds###
15911da177e4SLinus Torvalds# External module support.
15921da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
15931da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
15941da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
15951da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
15961da177e4SLinus Torvalds# be used.
15971da177e4SLinus Torvalds#
15981da177e4SLinus Torvalds# The following are the only valid targets when building external
15991da177e4SLinus Torvalds# modules.
16001da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
16011da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
16021da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
16031da177e4SLinus Torvalds# make M=dir modules_install
1604070b98bfSSam Ravnborg#                      Install the modules built in the module directory
16051da177e4SLinus Torvalds#                      Assumes install directory is already created
16061da177e4SLinus Torvalds
16071da177e4SLinus Torvalds# We are always building modules
16081da177e4SLinus TorvaldsKBUILD_MODULES := 1
16091da177e4SLinus Torvalds
16104f193362SPaul SmithPHONY += $(objtree)/Module.symvers
16111da177e4SLinus Torvalds$(objtree)/Module.symvers:
16121da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
16131da177e4SLinus Torvalds	echo; \
16141da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
16151da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
16161da177e4SLinus Torvalds	echo )
16171da177e4SLinus Torvalds
1618c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1619c99f3918SMasahiro YamadaPHONY += modules
1620c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers
1621b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
16221da177e4SLinus Torvalds
16234f193362SPaul SmithPHONY += modules_install
1624a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1625a67dc21aSSam Ravnborg
1626a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
16274f193362SPaul SmithPHONY += _emodinst_
1628a67dc21aSSam Ravnborg_emodinst_:
1629a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1630b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
16311da177e4SLinus Torvalds
16324f193362SPaul SmithPHONY += _emodinst_post
1633a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1634a67dc21aSSam Ravnborg	$(call cmd,depmod)
1635a67dc21aSSam Ravnborg
163676cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
163788d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
16381da177e4SLinus Torvalds
1639d4945049SMasahiro YamadaPHONY += /
1640d4945049SMasahiro Yamada/:
1641d4945049SMasahiro Yamada	@echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1642d4945049SMasahiro Yamada
1643fe69b420SMasahiro YamadaPHONY += help
16441da177e4SLinus Torvaldshelp:
16451da177e4SLinus Torvalds	@echo  '  Building external modules.'
16461da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
16471da177e4SLinus Torvalds	@echo  ''
16481da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
16491da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
16501da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
16511da177e4SLinus Torvalds	@echo  ''
165206300b21SSam Ravnborg
1653059bc9fcSMasahiro YamadaPHONY += prepare
16541da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
16551da177e4SLinus Torvalds
1656c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1657c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1658c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1659c99f3918SMasahiro Yamada# make menuconfig etc.
1660c99f3918SMasahiro Yamada# Error messages still appears in the original language
1661c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1662c99f3918SMasahiro Yamadadescend: $(build-dirs)
1663c99f3918SMasahiro Yamada$(build-dirs): prepare
1664394053f4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ single-build=$(single-build) need-builtin=1 need-modorder=1
1665c99f3918SMasahiro Yamada
166676cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
166776cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
166876cd306dSMasahiro Yamada$(clean-dirs):
166976cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
167076cd306dSMasahiro Yamada
167188d7be03SMichal Marekclean: $(clean-dirs)
167288d7be03SMichal Marek	$(call cmd,rmdirs)
167388d7be03SMichal Marek	$(call cmd,rmfiles)
167443f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1675ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
16764f0e3a57SRob Herring		-o -name '*.ko.*' \
16774f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1678ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1679b7dca6ddSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
168088d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
16819a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
16824fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
168388d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
168488d7be03SMichal Marek		-o -name modules.builtin -o -name '.tmp_*.o.*' \
16856b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1686433db3e2SVinícius Tinti		-o -name '*.ll' \
168788d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
168888d7be03SMichal Marek
16891da177e4SLinus Torvalds# Generate tags for editors
16901da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1691a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1692a680eedcSSam Ravnborg      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
16931da177e4SLinus Torvalds
1694f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
16951da177e4SLinus Torvalds	$(call cmd,tags)
16961da177e4SLinus Torvalds
16971da177e4SLinus Torvalds# Scripts to check various things for consistency
16981da177e4SLinus Torvalds# ---------------------------------------------------------------------------
16991da177e4SLinus Torvalds
1700279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1701279f3dd3SPeter Foley
17021da177e4SLinus Torvaldsincludecheck:
1703436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
17041da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
170580007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
17061da177e4SLinus Torvalds
17071da177e4SLinus Torvaldsversioncheck:
17082ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
17091da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
171080007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
17111da177e4SLinus Torvalds
171274425eeeSNicolas Palixcoccicheck:
171374425eeeSNicolas Palix	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
171474425eeeSNicolas Palix
17151da177e4SLinus Torvaldsnamespacecheck:
17161da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
17171da177e4SLinus Torvalds
1718295ac051SAdrian Bunkexport_report:
1719295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1720295ac051SAdrian Bunk
1721c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1722e3ccf6e3SJeff Dike
1723011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1724011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1725011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1726011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1727011e3a9aSJeff Dikeifeq ($(ARCH), um)
1728011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1729011e3a9aSJeff Dikeelse
1730011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1731011e3a9aSJeff Dikeendif
17321da177e4SLinus Torvaldscheckstack:
17331da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
173475dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
17351da177e4SLinus Torvalds
17367b8ea53dSAmerigo Wangkernelrelease:
17377b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
173801ab1788SAmerigo Wang
1739cb58455cSSam Ravnborgkernelversion:
17402244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
17411da177e4SLinus Torvalds
1742c398ff00SMike Marciniszynimage_name:
1743c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1744c398ff00SMike Marciniszyn
1745ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1746f47a23ceSMasahiro Yamada
1747f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1748f47a23ceSMasahiro Yamadatools_silent=s
1749f47a23ceSMasahiro Yamadaendif
1750f47a23ceSMasahiro Yamada
1751ea01fa9fSBorislav Petkovtools/: FORCE
1752bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
175375dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1754ea01fa9fSBorislav Petkov
1755ea01fa9fSBorislav Petkovtools/%: FORCE
1756bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
175775dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1758ea01fa9fSBorislav Petkov
175906300b21SSam Ravnborg# Single targets
176006300b21SSam Ravnborg# ---------------------------------------------------------------------------
1761394053f4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1762bc2546a6SSam Ravnborg#
1763394053f4SMasahiro Yamada#   make foo/bar/baz.s
1764394053f4SMasahiro Yamada#
1765394053f4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1766394053f4SMasahiro Yamada#
1767394053f4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1768394053f4SMasahiro Yamada#
1769394053f4SMasahiro Yamada#   make foo/bar/baz/
177006300b21SSam Ravnborg
1771394053f4SMasahiro Yamadaifdef single-build
177206300b21SSam Ravnborg
1773394053f4SMasahiro Yamadasingle-all := $(filter $(single-targets), $(MAKECMDGOALS))
1774394053f4SMasahiro Yamada
1775394053f4SMasahiro Yamada# .ko is special because modpost is needed
1776394053f4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(single-all)))
1777394053f4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(single-all)))
1778394053f4SMasahiro Yamada
1779394053f4SMasahiro Yamada$(single-ko): single_modpost
1780394053f4SMasahiro Yamada	@:
1781394053f4SMasahiro Yamada$(single-no-ko): descend
1782394053f4SMasahiro Yamada	@:
1783394053f4SMasahiro Yamada
178447801c97SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1785394053f4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
178647801c97SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1787394053f4SMasahiro YamadaMODORDER := .modules.tmp
178847801c97SMasahiro Yamadaendif
1789394053f4SMasahiro Yamada
1790394053f4SMasahiro YamadaPHONY += single_modpost
1791394053f4SMasahiro Yamadasingle_modpost: $(single-no-ko)
1792394053f4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
179347801c97SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1794394053f4SMasahiro Yamada
1795394053f4SMasahiro YamadaKBUILD_MODULES := 1
1796394053f4SMasahiro Yamada
1797394053f4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1798394053f4SMasahiro Yamada
1799394053f4SMasahiro Yamadasingle-build = $(if $(filter-out $@/, $(single-no-ko)),1)
1800394053f4SMasahiro Yamada
1801394053f4SMasahiro Yamadaendif
180206300b21SSam Ravnborg
18031da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
18041da177e4SLinus Torvalds# ===========================================================================
18051da177e4SLinus Torvalds
18061da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
18071da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
18081da177e4SLinus Torvalds
18091da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
18101da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
18111da177e4SLinus Torvalds
1812bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
181350a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1814569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
18155a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
181650a8ec31SSam Ravnborg
1817392885eeSMasahiro Yamada# read saved command lines for existing targets
1818392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
18191da177e4SLinus Torvalds
1820b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
18211da177e4SLinus Torvalds
18222042b548SMasahiro Yamadaendif # config-targets
18232042b548SMasahiro Yamadaendif # mixed-build
1824688931a5SMasahiro Yamadaendif # need-sub-make
18251da177e4SLinus Torvalds
18264f193362SPaul SmithPHONY += FORCE
18271da177e4SLinus TorvaldsFORCE:
18284f193362SPaul Smith
1829bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1830fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
18314f193362SPaul Smith.PHONY: $(PHONY)
1832