xref: /openbmc/linux/Makefile (revision d08b9f0ca6605e13dcb48f04e55a30545b3c71eb)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
38f3d9f35SLinus TorvaldsPATCHLEVEL = 7
455922c9dSLinus TorvaldsSUBLEVEL = 0
56a8b55edSLinus TorvaldsEXTRAVERSION = -rc3
6d6d5df1dSLinus TorvaldsNAME = Kleptomaniac Octopus
71da177e4SLinus Torvalds
81da177e4SLinus Torvalds# *DOCUMENTATION*
91da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
101da177e4SLinus Torvalds# More info can be located in ./README
111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
131da177e4SLinus Torvalds
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 $@ :<
68066b7ed9SMichal Marek#
69066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
70066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
71505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
72066b7ed9SMichal Marek#
731da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
741da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
751da177e4SLinus Torvalds
761da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
771da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
781da177e4SLinus Torvaldsendif
791da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
801da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
811da177e4SLinus Torvaldsendif
821da177e4SLinus Torvalds
83066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
84066b7ed9SMichal Marek  quiet =
85066b7ed9SMichal Marek  Q =
86066b7ed9SMichal Marekelse
87066b7ed9SMichal Marek  quiet=quiet_
88066b7ed9SMichal Marek  Q = @
89066b7ed9SMichal Marekendif
90066b7ed9SMichal Marek
91066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
92066b7ed9SMichal Marek# commands
93066b7ed9SMichal Marek
946f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
95066b7ed9SMichal Marek  quiet=silent_
96066b7ed9SMichal Marekendif
97066b7ed9SMichal Marek
98066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
99066b7ed9SMichal Marek
10025b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
10125b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
10225b146c5SMasahiro Yamada#
10325b146c5SMasahiro Yamada# For example, you can do this:
10425b146c5SMasahiro Yamada#
10525b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
10625b146c5SMasahiro Yamada#
10725b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
10825b146c5SMasahiro Yamada# two syntaxes to specify it.
10925b146c5SMasahiro Yamada#
1101da177e4SLinus Torvalds# 1) O=
1111da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1121da177e4SLinus Torvalds#
1131da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
11425b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
11525b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1161da177e4SLinus Torvalds#
1171da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1181da177e4SLinus Torvalds# variable.
1191da177e4SLinus Torvalds
12025b146c5SMasahiro Yamada# Do we want to change the working directory?
1211da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1221da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1231da177e4SLinus Torvaldsendif
1241da177e4SLinus Torvalds
12525b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
12625b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
12725b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
12825b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
12925b146c5SMasahiro Yamada$(if $(abs_objtree),, \
13025b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
13125b146c5SMasahiro Yamada
13225b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
13325b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
13425b146c5SMasahiro Yamadaelse
13525b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
13625b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
13725b146c5SMasahiro Yamada
13825b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
13925b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
14025b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
14125b146c5SMasahiro Yamadaelse
14225b146c5SMasahiro Yamadaneed-sub-make := 1
14351193b76SRobert Jarzmikendif
14451193b76SRobert Jarzmik
14525b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
1461da177e4SLinus Torvalds
14725b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
14825b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
14925b146c5SMasahiro Yamadaendif
15025b146c5SMasahiro Yamada
15125b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
15280463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
15380463f1bSMasahiro Yamada#
15480463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
15525b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
15625b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
157688931a5SMasahiro Yamadaneed-sub-make := 1
15825b146c5SMasahiro Yamadaendif
1593812b8c5SMasahiro Yamada
160688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
161688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
162688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
163688931a5SMasahiro Yamadaneed-sub-make := 1
164688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
165688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ;
166688931a5SMasahiro Yamadaendif
167688931a5SMasahiro Yamada
16825b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
169221cc2d2SMasahiro Yamadaexport sub_make_done := 1
170221cc2d2SMasahiro Yamada
171688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
172688931a5SMasahiro Yamada
1730b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
1740b35786dSMilton Miller
1750209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
17616f89098SCharles Keepax	@:
1770b35786dSMilton Miller
178c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
1792e8d696bSMasahiro Yamadasub-make:
18025b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
1811da177e4SLinus Torvalds
182688931a5SMasahiro Yamadaendif # need-sub-make
183221cc2d2SMasahiro Yamadaendif # sub_make_done
184688931a5SMasahiro Yamada
1851da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
186688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
1871da177e4SLinus Torvalds
1887ff52571SMasahiro Yamada# Do not print "Entering directory ...",
1897ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
1907ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
1917ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
1927ff52571SMasahiro Yamada
193aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
194aa55c8e2SMasahiro Yamada# C compilation.
195aa55c8e2SMasahiro Yamada#
196aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
197aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
198aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
199aa55c8e2SMasahiro Yamada#
200036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
201036db11cSCao jin# including where to get the "sparse" utility.
202aa55c8e2SMasahiro Yamada
203aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
204aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
205aa55c8e2SMasahiro Yamadaendif
206aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
207aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
208aa55c8e2SMasahiro Yamadaendif
209aa55c8e2SMasahiro Yamada
2107e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
2117e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
212aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
213aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
214aa55c8e2SMasahiro Yamadaendif
215aa55c8e2SMasahiro Yamada
216051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD
217051f278eSMasahiro Yamada
218394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
219394053f4SMasahiro Yamada
22025b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
2219da0763bSMichal Marek        # building in the source tree
2229da0763bSMichal Marek        srctree := .
223051f278eSMasahiro Yamada	building_out_of_srctree :=
2249da0763bSMichal Marekelse
22525b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
2269da0763bSMichal Marek                # building in a subdirectory of the source tree
2279da0763bSMichal Marek                srctree := ..
2289da0763bSMichal Marek        else
22925b146c5SMasahiro Yamada                srctree := $(abs_srctree)
2309da0763bSMichal Marek        endif
231051f278eSMasahiro Yamada	building_out_of_srctree := 1
2329da0763bSMichal Marekendif
2332c1f4f12SMasahiro Yamada
23495fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
23595fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
23695fd3f87SMasahiro Yamadaendif
2372c1f4f12SMasahiro Yamada
2387e1c0477SMichal Marekobjtree		:= .
2396b12de69SMasahiro YamadaVPATH		:= $(srctree)
2401da177e4SLinus Torvalds
241051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
2421da177e4SLinus Torvalds
2432c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2442c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2452c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2462c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2472c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2482c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2492c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2502c1f4f12SMasahiro Yamada
2512c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2522c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
2532c1f4f12SMasahiro Yamada
25422340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
25522340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2562c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
25759b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
2584623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
2594623980dSDavid Engraf			 outputmakefile
260a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \
261a29d4d8cSMasahiro Yamada			   kernelrelease
262394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
2632c1f4f12SMasahiro Yamada
2642042b548SMasahiro Yamadaconfig-build	:=
2652042b548SMasahiro Yamadamixed-build	:=
2662042b548SMasahiro Yamadaneed-config	:= 1
267d7942413SMasahiro Yamadamay-sync-config	:= 1
268394053f4SMasahiro Yamadasingle-build	:=
2692c1f4f12SMasahiro Yamada
2702c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2712c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2722042b548SMasahiro Yamada		need-config :=
2732c1f4f12SMasahiro Yamada	endif
2742c1f4f12SMasahiro Yamadaendif
2752c1f4f12SMasahiro Yamada
276d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
277d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
2782042b548SMasahiro Yamada		may-sync-config :=
279d7942413SMasahiro Yamada	endif
280d7942413SMasahiro Yamadaendif
281d7942413SMasahiro Yamada
282d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
2832042b548SMasahiro Yamada	may-sync-config :=
284d7942413SMasahiro Yamadaendif
285d7942413SMasahiro Yamada
2862c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
2872c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
2882042b548SMasahiro Yamada		config-build := 1
2892c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
2902042b548SMasahiro Yamada			mixed-build := 1
2912c1f4f12SMasahiro Yamada                endif
2922c1f4f12SMasahiro Yamada        endif
2932c1f4f12SMasahiro Yamadaendif
29422340a06SMasahiro Yamada
295394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
296394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
297394053f4SMasahiro Yamada	single-build := 1
298394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
299394053f4SMasahiro Yamada		mixed-build := 1
300394053f4SMasahiro Yamada	endif
301394053f4SMasahiro Yamadaendif
302394053f4SMasahiro Yamada
30322340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
30422340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
30522340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3062042b548SMasahiro Yamada		mixed-build := 1
30722340a06SMasahiro Yamada        endif
30822340a06SMasahiro Yamadaendif
30922340a06SMasahiro Yamada
3102c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3112c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3122c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3132042b548SMasahiro Yamada		mixed-build := 1
3142c1f4f12SMasahiro Yamada        endif
3152c1f4f12SMasahiro Yamadaendif
3162c1f4f12SMasahiro Yamada
3172042b548SMasahiro Yamadaifdef mixed-build
3182c1f4f12SMasahiro Yamada# ===========================================================================
3192c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3202c1f4f12SMasahiro Yamada# Handle them one by one.
3212c1f4f12SMasahiro Yamada
3222c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3232c1f4f12SMasahiro Yamada
3242c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
3252c1f4f12SMasahiro Yamada	@:
3262c1f4f12SMasahiro Yamada
3272c1f4f12SMasahiro Yamada__build_one_by_one:
3282c1f4f12SMasahiro Yamada	$(Q)set -e; \
3292c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3302c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3312c1f4f12SMasahiro Yamada	done
3322c1f4f12SMasahiro Yamada
3332042b548SMasahiro Yamadaelse # !mixed-build
3342c1f4f12SMasahiro Yamada
3352c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
3362c1f4f12SMasahiro Yamada
3372c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3382c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3392c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3402c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3412c1f4f12SMasahiro Yamada
342b2d35fa5SAnders Roxellinclude scripts/subarch.include
3431da177e4SLinus Torvalds
3441da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3451da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3461da177e4SLinus Torvalds#
3471da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3481da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3491da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3501da177e4SLinus Torvalds# make ARCH=ia64
3511da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3521da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3531da177e4SLinus Torvalds
3541da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3551da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3561da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3571da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3581da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3591da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3601da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3611da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3622331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3631da177e4SLinus Torvalds
3641da177e4SLinus Torvalds# Architecture as present in compile.h
3651da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3666752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3671da177e4SLinus Torvalds
368d746d647SSam Ravnborg# Additional ARCH settings for x86
369d746d647SSam Ravnborgifeq ($(ARCH),i386)
370d746d647SSam Ravnborg        SRCARCH := x86
371d746d647SSam Ravnborgendif
372d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
373d746d647SSam Ravnborg        SRCARCH := x86
374d746d647SSam Ravnborgendif
37574b469f2SSam Ravnborg
3765e538790SSam Ravnborg# Additional ARCH settings for sparc
377e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
378e69f58c0SNamhyung Kim       SRCARCH := sparc
379e69f58c0SNamhyung Kimendif
380a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
3815e538790SSam Ravnborg       SRCARCH := sparc
382a439fe51SSam Ravnborgendif
3832fb9b1bdSSam Ravnborg
3843cc000b5SPaul Mundt# Additional ARCH settings for sh
3853cc000b5SPaul Mundtifeq ($(ARCH),sh64)
3863cc000b5SPaul Mundt       SRCARCH := sh
3873cc000b5SPaul Mundtendif
3883cc000b5SPaul Mundt
38914cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
39041263fc6SBen Gardinerexport KCONFIG_CONFIG
39114cdd3c4SRoman Zippel
3922a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
3932a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig
3942a86f661SMasahiro Yamada
3951da177e4SLinus Torvalds# SHELL used by kbuild
396858805b3SMasahiro YamadaCONFIG_SHELL := sh
3971da177e4SLinus Torvalds
3986d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
3996d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4006d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
401d7f14c66SUwe Kleine-König
402a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
403a0d1c951SMasahiro YamadaHOSTCC	= clang
404a0d1c951SMasahiro YamadaHOSTCXX	= clang++
405a0d1c951SMasahiro Yamadaelse
4061da177e4SLinus TorvaldsHOSTCC	= gcc
4071da177e4SLinus TorvaldsHOSTCXX	= g++
408a0d1c951SMasahiro Yamadaendif
40996f14fe7SLaura AbbottKBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
410f92d19e0SLaura Abbott		-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
411f92d19e0SLaura Abbott		$(HOSTCFLAGS)
412735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
413f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
414f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4151da177e4SLinus Torvalds
4161da177e4SLinus Torvalds# Make variables (CC, etc...)
4171da177e4SLinus TorvaldsCPP		= $(CC) -E
418a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
419a0d1c951SMasahiro YamadaCC		= clang
420a0d1c951SMasahiro YamadaLD		= ld.lld
421a0d1c951SMasahiro YamadaAR		= llvm-ar
422a0d1c951SMasahiro YamadaNM		= llvm-nm
423a0d1c951SMasahiro YamadaOBJCOPY		= llvm-objcopy
424a0d1c951SMasahiro YamadaOBJDUMP		= llvm-objdump
425a0d1c951SMasahiro YamadaREADELF		= llvm-readelf
426a0d1c951SMasahiro YamadaOBJSIZE		= llvm-size
427a0d1c951SMasahiro YamadaSTRIP		= llvm-strip
428a0d1c951SMasahiro Yamadaelse
429a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
430a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
4311da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4321da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4331da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4341da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
435eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
436a0d1c951SMasahiro YamadaOBJSIZE		= $(CROSS_COMPILE)size
437a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
438a0d1c951SMasahiro Yamadaendif
439e83b9f55SAndrii NakryikoPAHOLE		= pahole
44073a4f6dbSMasahiro YamadaLEX		= flex
44173a4f6dbSMasahiro YamadaYACC		= bison
4421da177e4SLinus TorvaldsAWK		= awk
443caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
4441da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
4451da177e4SLinus TorvaldsPERL		= perl
446011bf125SMasahiro YamadaPYTHON		= python
447e9781b52SMasahiro YamadaPYTHON3		= python3
4481da177e4SLinus TorvaldsCHECK		= sparse
449858805b3SMasahiro YamadaBASH		= bash
4501da177e4SLinus Torvalds
45180a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4526c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4530c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4546588169dSSam RavnborgCFLAGS_MODULE   =
4556588169dSSam RavnborgAFLAGS_MODULE   =
4566588169dSSam RavnborgLDFLAGS_MODULE  =
4571da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4581da177e4SLinus TorvaldsAFLAGS_KERNEL	=
459b36fad65SMichal MarekLDFLAGS_vmlinux =
4601da177e4SLinus Torvalds
461abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
462abbf1590SDavid HowellsUSERINCLUDE    := \
4639d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4649d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
465abbf1590SDavid Howells		-I$(srctree)/include/uapi \
4663308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
467abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
468abbf1590SDavid Howells
4691da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
4701da177e4SLinus Torvalds# Needed to be compatible with the O= option
471abbf1590SDavid HowellsLINUXINCLUDE    := \
4729d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
4739d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
474051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
475f8224f7fSMasahiro Yamada		-I$(objtree)/include \
476f8224f7fSMasahiro Yamada		$(USERINCLUDE)
4771da177e4SLinus Torvalds
47842a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
479eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
48042a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
481b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
48251b97e35SKirill A. Shutemov		   -Wno-format-security \
483433dc2ebSMasahiro Yamada		   -std=gnu89
484433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
48580c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
48680c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
4876588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
4886588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
48910df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
49010df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
491d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
492433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
4935241ab4cSMasahiro YamadaCLANG_FLAGS :=
4941da177e4SLinus Torvalds
495aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
496eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
49794f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
4987bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
4991da177e4SLinus Torvalds
500d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
5010e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
5020e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
503222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
5046588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
50580c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
5061da177e4SLinus Torvalds
5071da177e4SLinus Torvalds# Files to ignore in find ... statements
5081da177e4SLinus Torvalds
509ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
510ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
511ae63b2d7SPrarit Bhargava			  -prune -o
512450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
513450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
5141da177e4SLinus Torvalds
5151da177e4SLinus Torvalds# ===========================================================================
5161da177e4SLinus Torvalds# Rules shared between *config targets and build targets
5171da177e4SLinus Torvalds
518312a3d09SCao jin# Basic helpers built in scripts/basic/
5194f193362SPaul SmithPHONY += scripts_basic
5201da177e4SLinus Torvaldsscripts_basic:
5211da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
522638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
5231da177e4SLinus Torvalds
5244f193362SPaul SmithPHONY += outputmakefile
525e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
526fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
527fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
528fd5f0cd6SJan Beulich# output directory.
5293a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5303a51ff34SVladimir Kondratiev# ignore whole output directory
5311da177e4SLinus Torvaldsoutputmakefile:
532051f278eSMasahiro Yamadaifdef building_out_of_srctree
533e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
534e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
535e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
536e8e83a23SMasahiro Yamada		echo >&2 "***"; \
537e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
538e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
539e8e83a23SMasahiro Yamada		echo >&2 "***"; \
540e8e83a23SMasahiro Yamada		false; \
541e8e83a23SMasahiro Yamada	fi
54292979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5434fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
544156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
545156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
546fd5f0cd6SJan Beulichendif
5471da177e4SLinus Torvalds
54899516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
549ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
5505241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
551ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
552238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)
553ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
554ae6b289aSChris Friesendif
555ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
556238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
557ae6b289aSChris Friesendif
5587e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1)
559238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
560876a0600SNathan Chancellorendif
561589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
562238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
563238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
5643bd98050SJoel Stanleyexport CLANG_FLAGS
565ae6b289aSChris Friesendif
566ae6b289aSChris Fries
567315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
568315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
569315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
570315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
571902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
572315bab4eSMasahiro Yamada
5732042b548SMasahiro Yamadaifdef config-build
5741da177e4SLinus Torvalds# ===========================================================================
5751da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
5761da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
5771da177e4SLinus Torvalds
5781da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
5791da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
5801da177e4SLinus Torvalds# used for 'make defconfig'
581a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
582315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
5831da177e4SLinus Torvalds
58436de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
58531110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
58631110ebbSSam Ravnborg
58736de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
5881da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
5891da177e4SLinus Torvalds
5902042b548SMasahiro Yamadaelse #!config-build
5911da177e4SLinus Torvalds# ===========================================================================
5921da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
5931da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
5941da177e4SLinus Torvalds
5952c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
5962c1f4f12SMasahiro Yamada# but instead _all depend on modules
5972c1f4f12SMasahiro YamadaPHONY += all
5982c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
5992c1f4f12SMasahiro Yamada_all: all
6002c1f4f12SMasahiro Yamadaelse
6012c1f4f12SMasahiro Yamada_all: modules
6022c1f4f12SMasahiro Yamadaendif
6032c1f4f12SMasahiro Yamada
6042c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
6052c1f4f12SMasahiro Yamada# Normally, just do built-in.
6062c1f4f12SMasahiro Yamada
6072c1f4f12SMasahiro YamadaKBUILD_MODULES :=
6082c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
6092c1f4f12SMasahiro Yamada
6102c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
6112c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider
6122c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to
6132c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them.
6142c1f4f12SMasahiro Yamada
6152c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
6162c1f4f12SMasahiro Yamada  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
6172c1f4f12SMasahiro Yamadaendif
6182c1f4f12SMasahiro Yamada
6192c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
6202c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
6212c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
6222c1f4f12SMasahiro Yamada
623d85103acSMasahiro Yamadaifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
6242c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6252c1f4f12SMasahiro Yamadaendif
6262c1f4f12SMasahiro Yamada
6272c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6282c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6292c1f4f12SMasahiro Yamadaendif
6302c1f4f12SMasahiro Yamada
6312c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6322c1f4f12SMasahiro Yamada
6332042b548SMasahiro Yamadaifdef need-config
634d93a18f2SMasahiro Yamadainclude include/config/auto.conf
635d93a18f2SMasahiro Yamadaendif
636d93a18f2SMasahiro Yamada
6371da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6381da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
6391da177e4SLinus Torvaldsinit-y		:= init/
640f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
641d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
6421da177e4SLinus Torvaldsnet-y		:= net/
6431da177e4SLinus Torvaldslibs-y		:= lib/
6441da177e4SLinus Torvaldscore-y		:= usr/
64537d9fe47SFeng Wuvirt-y		:= virt/
6461da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6471da177e4SLinus Torvalds
648315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
649315bab4eSMasahiro Yamada# command line.
650315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
651315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
652315bab4eSMasahiro Yamadaall: vmlinux
653315bab4eSMasahiro Yamada
654315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
655315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
656315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
6575aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
658315bab4eSMasahiro Yamada
659b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
660b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
661b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
662b1f4ff74SPaulo Zanoniendif
663b1f4ff74SPaulo Zanoni
664669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
665669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
666669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
667669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
668669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
669669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
670669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
671669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
672669e06b1SMasahiro Yamada
673315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
674315bab4eSMasahiro Yamada
6752042b548SMasahiro Yamadaifdef need-config
6762042b548SMasahiro Yamadaifdef may-sync-config
677315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
678315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
679315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
680d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
6811da177e4SLinus Torvalds
68205850719SMasahiro Yamada$(KCONFIG_CONFIG):
68305850719SMasahiro Yamada	@echo >&2 '***'
68405850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
68505850719SMasahiro Yamada	@echo >&2 '***'
68605850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
68705850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
68805850719SMasahiro Yamada	@echo >&2 '***'
68905850719SMasahiro Yamada	@/bin/false
6901da177e4SLinus Torvalds
69161277981SUlf Magnusson# The actual configuration files used during the build are stored in
69261277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
69361277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
6949390dff6SMasahiro Yamada#
6959390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
6969390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
697f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
6988b41fc44SMasahiro Yamada%/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG)
699911a91c3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
7002042b548SMasahiro Yamadaelse # !may-sync-config
701d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
702d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
703d7942413SMasahiro Yamada# Use auto.conf to trigger the test
7049ee4e336SSam RavnborgPHONY += include/config/auto.conf
7059ee4e336SSam Ravnborg
7069ee4e336SSam Ravnborginclude/config/auto.conf:
707264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
7085369f550SMichal Marek	echo >&2;							\
7095369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
7105369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
7115369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
7125369f550SMichal Marek	echo >&2 ;							\
7139ee4e336SSam Ravnborg	/bin/false)
7149ee4e336SSam Ravnborg
715d7942413SMasahiro Yamadaendif # may-sync-config
7162042b548SMasahiro Yamadaendif # need-config
7171da177e4SLinus Torvalds
718a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
719ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
720bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
721bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7226f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
723a1c48bb1SGeert Uytterhoeven
72415f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
725a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
72615f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
72715f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
72815f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
72915f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
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)
738b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
73969102311SJiri Kosina
740d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov
7416b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
7426b90bd4bSEmese Revfy
7431873e870SAndi Kleenifdef CONFIG_READABLE_ASM
7441873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
7451873e870SAndi Kleen# reorder blocks reorders the control in the function
7461873e870SAndi Kleen# ipa clone creates specialized cloned functions
7471873e870SAndi Kleen# partial inlining inlines only parts of functions
7481873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
7491873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
7501873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
7511873e870SAndi Kleenendif
7521873e870SAndi Kleen
75308f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
754a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
75535bb5b1eSAndi Kleenendif
75635bb5b1eSAndi Kleen
7572a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
758050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
759050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
7602a61f474SMasahiro Yamada
7612a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
762e06b8b98SSam Ravnborg
763076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
764a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
765a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
766a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
767cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
768cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
769cfe17c9bSMasahiro Yamada# See modpost pattern 2
770a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
771cfe17c9bSMasahiro Yamadaelse
772cfe17c9bSMasahiro Yamada
773cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
774cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
7759df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
776e2079e93SNathan Chancellor
777e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
778e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
779e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
780e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
781cfe17c9bSMasahiro Yamadaendif
782cfe17c9bSMasahiro Yamada
7830a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
7841da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
785a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
7861da177e4SLinus Torvaldselse
7877e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
7887e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
7897e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
7907e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
7917e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
7927e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
793a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
7941da177e4SLinus Torvaldsendif
7957e9501fdSRabin Vincentendif
7961da177e4SLinus Torvalds
797709a972eSKees Cook# Initialize all stack variables with a pattern, if desired.
798709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL
799709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
800709a972eSKees Cookendif
801709a972eSKees Cook
8021e88e415SMasahiro YamadaDEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
8032062afb4SLinus Torvalds
8041da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
805866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
8069d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
807866ced95SAndi Kleenelse
8081e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
809866ced95SAndi Kleenendif
8102288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
8111da177e4SLinus Torvaldsendif
812bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
8139d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
814bfaf2dd3SAndi Kleenendif
8151da177e4SLinus Torvalds
816d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
8171e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
818e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
819d6f4ceb7SAndi Kleenendif
820d6f4ceb7SAndi Kleen
8211e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
8221e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
8231e88e415SMasahiro Yamada
824606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
82507d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
82607d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
82707d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
82807d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
82907d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
830a2546faeSSteven Rostedt  endif
8312f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8322f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8332f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8342f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8352f4df001SVasily Gorbik    endif
8362f4df001SVasily Gorbik  endif
83707d04081SVasily Gorbikendif
838a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
839f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
840f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
841f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
842a2546faeSSteven Rostedt  endif
843f28bc3c3SVasily Gorbikendif
844f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
845f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
846f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
84772441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
848cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
84972441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
85072441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
85172441cb1SSteven Rostedt	endif
85272441cb1SSteven Rostedtendif
85316444a8aSArnaldo Carvalho de Meloendif
85416444a8aSArnaldo Carvalho de Melo
85591341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
85691341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
85791341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
85891341d4bSSam Ravnborgendif
85991341d4bSSam Ravnborg
86090ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
861e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
862e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
86390ad4052SMasahiro Yamadaendif
86490ad4052SMasahiro Yamada
86543bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH
86643bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
86743bd3a95SMiroslav Benesendif
86843bd3a95SMiroslav Benes
869*d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK
870*d08b9f0cSSami TolvanenCC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
871*d08b9f0cSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
872*d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS
873*d08b9f0cSSami Tolvanenendif
874*d08b9f0cSSami Tolvanen
875e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
876e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
877e8e69931SSam Ravnborg
8781da177e4SLinus Torvalds# warn about C99 declaration after statement
879a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
8801da177e4SLinus Torvalds
8810bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
8828289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
8830bb95f80SKees Cook
884070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
885fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
8861da177e4SLinus Torvalds
887217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
888217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
889217c3e01SStephen Rothwell
890fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
891a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
892d0115552SLinus Torvalds
89387e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this
89487e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we
89587e0d4f0SDaniel Borkmann# need to disable it here generally.
89687e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fno-merge-all-constants)
89787e0d4f0SDaniel Borkmann
89887e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine
89987e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled.
90087e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fmerge-constants)
90187e0d4f0SDaniel Borkmann
9023ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
9033ce120b1SLinus TorvaldsKBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
9043ce120b1SLinus Torvalds
9058f7f5c9fSAndi Kleen# conserve stack if available
9068f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
9078f7f5c9fSAndi Kleen
908fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
909fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
910fe7c36c7SJosh Triplett
911ea8daa7bSDaniel Wagner# enforce correct pointer usage
912ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
913ea8daa7bSDaniel Wagner
914c834f0e8SKees Cook# Require designated initializers for all marked structures
915c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
916c834f0e8SKees Cook
917a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
918a73619a8SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
919a73619a8SMasahiro Yamada
92029be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is
92129be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern
92229be86d7SSeth Forsheeifdef CONFIG_RETPOLINE
92329be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
92429be86d7SSeth Forsheeendif
92529be86d7SSeth Forshee
926a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
927a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
928c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
929a86fe353SMasahiro Yamada
9308cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
9318cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
9328cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
9338cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
93452bcc330SSam Ravnborg
93589ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id
93689ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id
93718991197SRoland McGrath
9385d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
939d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
9405d7d18f5SDavid Howellsendif
9415d7d18f5SDavid Howells
9425cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
9435cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
9445cf896fbSPeter Collingbourneendif
9455cf896fbSPeter Collingbourne
94680591e61SLuc Van Oostenryck# make the checker run with the right architecture
94780591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
94880591e61SLuc Van Oostenryck
94914516765SLuc Van Oostenryck# insure the checker run with the right endianness
95014516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
95114516765SLuc Van Oostenryck
9521f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
9531f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
9541f2f01b1SLuc Van Oostenryck
9551da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
9561da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
9571da177e4SLinus Torvalds# set in the environment
9581da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
9591da177e4SLinus Torvalds# this default value
9601da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
9611da177e4SLinus Torvalds
9621da177e4SLinus Torvalds#
9631da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
9641da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
9651da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
9661da177e4SLinus Torvalds
9671da177e4SLinus Torvalds#
968f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
969f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
970f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
971f4d4ffc0SJason Cooper#
972f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
973f4d4ffc0SJason Cooper
974f4d4ffc0SJason Cooper#
9751da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
9761da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
977070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
9781da177e4SLinus Torvalds#
9791da177e4SLinus Torvalds
980df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
9811da177e4SLinus Torvaldsexport MODLIB
9821da177e4SLinus Torvalds
983ac031f26STheodore Ts'o#
9842ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
9852ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
9862ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
987177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
9882ea03891SSam Ravnborg
989ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
990ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
9912ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
992ac031f26STheodore Ts'oelse
9932ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
994ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
995ac031f26STheodore Ts'oelse
9962ea03891SSam Ravnborgmod_strip_cmd = true
997ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
998ac031f26STheodore Ts'oexport mod_strip_cmd
999ac031f26STheodore Ts'o
1000beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
1001beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
1002beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
1003beb50df3SBertrand Jacquin
1004beb50df3SBertrand Jacquinmod_compress_cmd = true
1005beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
1006beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
10073d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
1008beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
1009beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
10103d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
1011beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
1012beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
1013beb50df3SBertrand Jacquinexport mod_compress_cmd
1014beb50df3SBertrand Jacquin
1015d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
10163ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
10173ee550f1SDavid Woodhouse
10183ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1019e2a666d5SRusty Russellelse
1020e2a666d5SRusty Russellmod_sign_cmd = true
1021e2a666d5SRusty Russellendif
1022e2a666d5SRusty Russellexport mod_sign_cmd
1023e2a666d5SRusty Russell
1024056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1025056d28d1SRolf Eike Beer
10269f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
10279f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
1028056d28d1SRolf Eike Beer		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
10299f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
10309f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
10319f0c18aeSJosh Poimboeuf  else
10329f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
10339f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
10349f0c18aeSJosh Poimboeuf  endif
10359f0c18aeSJosh Poimboeufendif
10369f0c18aeSJosh Poimboeuf
1037e00d8880SMasahiro YamadaPHONY += prepare0
1038e2a666d5SRusty Russell
1039394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
1040bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
104147801c97SMasahiro Yamada
10421da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1043cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
10441da177e4SLinus Torvalds
10451da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
10461da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
104737d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
10481da177e4SLinus Torvalds
10491eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
10501eaca4b9SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
10511eaca4b9SMasahiro Yamada			$(drivers-) $(net-) $(libs-) $(virt-))))
10521da177e4SLinus Torvalds
1053c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
105476cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1055c99f3918SMasahiro Yamada
1056f49821eeSNicholas Piggininit-y		:= $(patsubst %/, %/built-in.a, $(init-y))
1057f49821eeSNicholas Piggincore-y		:= $(patsubst %/, %/built-in.a, $(core-y))
1058f49821eeSNicholas Piggindrivers-y	:= $(patsubst %/, %/built-in.a, $(drivers-y))
1059f49821eeSNicholas Pigginnet-y		:= $(patsubst %/, %/built-in.a, $(net-y))
10607273ad2bSMasahiro Yamadalibs-y2		:= $(patsubst %/, %/built-in.a, $(filter %/, $(libs-y)))
10617273ad2bSMasahiro Yamadaifdef CONFIG_MODULES
10627273ad2bSMasahiro Yamadalibs-y1		:= $(filter-out %/, $(libs-y))
10637273ad2bSMasahiro Yamadalibs-y2		+= $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
10647273ad2bSMasahiro Yamadaelse
10651da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
10667273ad2bSMasahiro Yamadaendif
1067f49821eeSNicholas Pigginvirt-y		:= $(patsubst %/, %/built-in.a, $(virt-y))
10681da177e4SLinus Torvalds
10691f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1070d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
1071d151e971SMasahiro Yamada			      $(drivers-y) $(net-y) $(virt-y)
10723a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1)
107395698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
10741f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
107585f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1076233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
10771da177e4SLinus Torvalds
1078d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
10791da177e4SLinus Torvalds
10803fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
10813fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
10822441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
1083c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order
1084ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
108586556392SNicolas Pitre	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
10862441e78bSNicolas Pitreendif
108723121ca2SNicolas Pitre
10881f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
10891f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
10901f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
10911f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS
10921f50b80aSMasahiro Yamada  KBUILD_MODULES := 1
10931f50b80aSMasahiro Yamadaendif
10941f50b80aSMasahiro Yamada
109507a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
109607a422bbSMasahiro Yamada
109788694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
109888694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
109988694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
110088694cffSQuentin Perret
110107a422bbSMasahiro Yamada$(autoksyms_h):
110288694cffSQuentin Perret	$(call cmd,autoksyms_h)
110323121ca2SNicolas Pitre
1104fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1105fbe6e37dSNicholas Piggin
1106fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1107fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
1108d503ac53SMasahiro Yamada	$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
1109fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
11102441e78bSNicolas Pitre
11113fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
11121f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1113741f98feSSam Ravnborg
1114392885eeSMasahiro Yamadatargets := vmlinux
1115392885eeSMasahiro Yamada
11161da177e4SLinus Torvalds# The actual objects are generated when descending,
11171da177e4SLinus Torvalds# make sure no implicit rule kicks in
1118c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ;
11191da177e4SLinus Torvalds
1120ba97df45SMasahiro Yamadafilechk_kernel.release = \
11210d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
11220d0e7718SMichal Marek
112383a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
112424512795SMasahiro Yamadainclude/config/kernel.release: FORCE
11250d0e7718SMichal Marek	$(call filechk,kernel.release)
1126cb58455cSSam Ravnborg
1127d8821622SMasahiro Yamada# Additional helpers built in scripts/
1128d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1129d8821622SMasahiro Yamada# in parallel
1130d8821622SMasahiro YamadaPHONY += scripts
113160df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1132d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1133cb58455cSSam Ravnborg
11341da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
11355bb78269SSam Ravnborg# or the modules are listed in "prepare".
11365bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
11375bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
11385bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
11391da177e4SLinus Torvalds
1140a5139fb3SMasahiro YamadaPHONY += prepare archprepare
11415bb78269SSam Ravnborg
114236de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
114330527cefSMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
11445bb78269SSam Ravnborg
114565bba042SMasahiro Yamadaprepare0: archprepare
114660df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
11478d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
114886feeaa8SSam Ravnborg
11491da177e4SLinus Torvalds# All the preparing..
1150b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1151b9ab5ebbSJosh Poimboeuf
11522c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
11537d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
11547d0e5c20SMasahiro Yamada
11552c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
11562c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1157037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1158037fc336SMasahiro Yamada	generic=include/asm-generic
11592c1f4f12SMasahiro Yamadauapi-asm-generic:
1160037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1161037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
11622c1f4f12SMasahiro Yamada
1163b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
11643b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1165ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1166ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1167ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1168ef7cfd00SMasahiro Yamada	@false
1169ef7cfd00SMasahiro Yamadaelse
1170ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1171ef7cfd00SMasahiro Yamadaendif
1172ef7cfd00SMasahiro Yamadaendif
11731da177e4SLinus Torvalds
11741da177e4SLinus Torvalds# Generate some files
11751da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11761da177e4SLinus Torvalds
11771da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
11781da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
11791da177e4SLinus Torvalds
11801da177e4SLinus Torvaldsuts_len := 64
118163104eecSSam Ravnborgdefine filechk_utsrelease.h
11821da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
11831da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
11841da177e4SLinus Torvalds	  exit 1;                                                         \
11851da177e4SLinus Torvalds	fi;                                                               \
1186ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
11871da177e4SLinus Torvaldsendef
11881da177e4SLinus Torvalds
118963104eecSSam Ravnborgdefine filechk_version.h
1190ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
119178d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1192ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
119363104eecSSam Ravnborgendef
119463104eecSSam Ravnborg
119543fee2b2SMasahiro Yamada$(version_h): FORCE
11961da177e4SLinus Torvalds	$(call filechk,version.h)
1197223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
11981da177e4SLinus Torvalds
1199273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
120063104eecSSam Ravnborg	$(call filechk,utsrelease.h)
120163104eecSSam Ravnborg
1202179efcb4SVegard NossumPHONY += headerdep
1203179efcb4SVegard Nossumheaderdep:
12049663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
12059663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1206179efcb4SVegard Nossum
12071da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12088d730cfbSDavid Woodhouse# Kernel headers
12098d730cfbSDavid Woodhouse
1210e6883b18SSam Ravnborg#Default location for installed headers
1211e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1212e6883b18SSam Ravnborg
121359b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
121459b2bd05SMasahiro Yamada      cmd_headers_install = \
121559b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
121659b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
121759b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
12186d716275SDavid Woodhouse
12198d730cfbSDavid WoodhousePHONY += headers_install
122059b2bd05SMasahiro Yamadaheaders_install: headers
122159b2bd05SMasahiro Yamada	$(call cmd,headers_install)
12224f193362SPaul Smith
12231da177e4SLinus TorvaldsPHONY += archheaders archscripts
12241da177e4SLinus Torvalds
1225a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
12261da177e4SLinus Torvalds
122759b2bd05SMasahiro YamadaPHONY += headers
122859b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
12299d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
12302fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1231d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1232d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
12331f85712eSMike Frysinger
12347ecaf069SMasahiro Yamada# Deprecated. It is no-op now.
123568475359SDavid WoodhousePHONY += headers_check
12367ecaf069SMasahiro Yamadaheaders_check:
12377ecaf069SMasahiro Yamada	@:
123868475359SDavid Woodhouse
1239e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
124059b2bd05SMasahiro Yamadaprepare: headers
1241e949f4c2SMasahiro Yamadaendif
12421da177e4SLinus Torvalds
1243bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1244bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1245bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1246bdd7714bSMasahiro Yamada
12471da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12485a5da78bSShuah Khan# Kernel selftest
12495a5da78bSShuah Khan
12505a5da78bSShuah KhanPHONY += kselftest
12515a5da78bSShuah Khankselftest:
12522bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
12535a5da78bSShuah Khan
125417eac6c2SShuah Khankselftest-%: FORCE
125517eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1256dcb825a9SWang Long
12573d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
12583d6dee7aSBamvor Jian Zhangkselftest-merge:
12593d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
12606d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
12616d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
12623e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
12633d6dee7aSBamvor Jian Zhang
12645a5da78bSShuah Khan# ---------------------------------------------------------------------------
126537c8a5faSRob Herring# Devicetree files
126637c8a5faSRob Herring
126737c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
126837c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
126937c8a5faSRob Herringendif
127037c8a5faSRob Herring
127137c8a5faSRob Herringifneq ($(dtstree),)
127237c8a5faSRob Herring
1273a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
127437c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
127537c8a5faSRob Herring
1276c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check
1277b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc
127837c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
127937c8a5faSRob Herring
1280b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1281e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1282b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1283b5154bf6SMasahiro Yamadaendif
1284b5154bf6SMasahiro Yamada
1285b5154bf6SMasahiro Yamadadtbs_check: dtbs
12864f0e3a57SRob Herring
128737c8a5faSRob Herringdtbs_install:
12882431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
128937c8a5faSRob Herring
129037c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
129137c8a5faSRob Herringall: dtbs
129237c8a5faSRob Herringendif
129337c8a5faSRob Herring
129437c8a5faSRob Herringendif
129537c8a5faSRob Herring
129637c8a5faSRob HerringPHONY += scripts_dtc
129737c8a5faSRob Herringscripts_dtc: scripts_basic
129837c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
129937c8a5faSRob Herring
1300e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1301e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1302e10c4321SMasahiro Yamadaendif
1303e10c4321SMasahiro Yamada
1304c473a8d0SMasahiro YamadaPHONY += dt_binding_check
13054f0e3a57SRob Herringdt_binding_check: scripts_dtc
13064f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
13074f0e3a57SRob Herring
130837c8a5faSRob Herring# ---------------------------------------------------------------------------
13091da177e4SLinus Torvalds# Modules
13101da177e4SLinus Torvalds
13111da177e4SLinus Torvaldsifdef CONFIG_MODULES
13121da177e4SLinus Torvalds
13131da177e4SLinus Torvalds# By default, build modules as well
13141da177e4SLinus Torvalds
131573d1393eSMichal Marekall: modules
13161da177e4SLinus Torvalds
13171da177e4SLinus Torvalds# Build modules
1318551559e1STejun Heo#
1319551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1320551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1321551559e1STejun Heo# using awk while concatenating to the final file.
13221da177e4SLinus Torvalds
13234f193362SPaul SmithPHONY += modules
13248b41fc44SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order
1325b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
13263a48a919SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
13271da177e4SLinus Torvalds
1328c99f3918SMasahiro Yamadamodules.order: descend
1329c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1330a6c36632SMichal Marek
13311da177e4SLinus Torvalds# Target to prepare building external modules
13324f193362SPaul SmithPHONY += modules_prepare
1333059bc9fcSMasahiro Yamadamodules_prepare: prepare
13341da177e4SLinus Torvalds
13351da177e4SLinus Torvalds# Target to install modules
13364f193362SPaul SmithPHONY += modules_install
13371da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
13381da177e4SLinus Torvalds
13394f193362SPaul SmithPHONY += _modinst_
13402da30e70SMichal Marek_modinst_:
13411da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
13421da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
13431da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
13448e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
13451da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
13461da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
13477e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
13481da177e4SLinus Torvalds	fi
13491bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
13508b41fc44SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
1351898490c0SAlexey Gladkov	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1352b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
13531da177e4SLinus Torvalds
135450a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
13551da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
13561da177e4SLinus Torvalds# boot script depmod is the master version.
13574f193362SPaul SmithPHONY += _modinst_post
13586d128e1eSLinus Torvalds_modinst_post: _modinst_
135950a8ec31SSam Ravnborg	$(call cmd,depmod)
13601da177e4SLinus Torvalds
1361d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1362d890f510SJosh BoyerPHONY += modules_sign
1363d890f510SJosh Boyermodules_sign:
1364d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1365d890f510SJosh Boyerendif
1366d890f510SJosh Boyer
13671da177e4SLinus Torvaldselse # CONFIG_MODULES
13681da177e4SLinus Torvalds
13691da177e4SLinus Torvalds# Modules not configured
13701da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13711da177e4SLinus Torvalds
1372612e47ceSMasahiro YamadaPHONY += modules modules_install
1373612e47ceSMasahiro Yamadamodules modules_install:
13745369f550SMichal Marek	@echo >&2
13755369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
13765369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
13775369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
13785369f550SMichal Marek	@echo >&2
13791da177e4SLinus Torvalds	@exit 1
13801da177e4SLinus Torvalds
13811da177e4SLinus Torvaldsendif # CONFIG_MODULES
13821da177e4SLinus Torvalds
13831da177e4SLinus Torvalds###
13841da177e4SLinus Torvalds# Cleaning is done on three levels.
13851da177e4SLinus Torvalds# make clean     Delete most generated files
13861da177e4SLinus Torvalds#                Leave enough to build external modules
13871da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
13881da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
13891da177e4SLinus Torvalds
13901da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1391b7dca6ddSMasahiro YamadaCLEAN_DIRS  += include/ksym
13928b41fc44SMasahiro YamadaCLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps
13931da177e4SLinus Torvalds
13941da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1395d6fc9fcbSMasahiro YamadaMRPROPER_DIRS  += include/config include/generated          \
139646a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
139746a63d4bSMasahiro Yamada		  debian/ snap/ tar-install/
1398278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \
139946457133SMasahiro Yamada		  Module.symvers \
1400fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1401fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
140246a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
140346a63d4bSMasahiro Yamada		  *.spec
14041da177e4SLinus Torvalds
140546457133SMasahiro Yamada# Directories & files removed with 'make distclean'
140646457133SMasahiro YamadaDISTCLEAN_DIRS  +=
140746457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
140846457133SMasahiro Yamada
14091da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
14101da177e4SLinus Torvalds#
14111da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
14121da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
14131da177e4SLinus Torvalds
141476cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
14151da177e4SLinus Torvalds
1416bd1ee804SPawel Mollvmlinuxclean:
1417bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1418fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1419bd1ee804SPawel Moll
1420bd1ee804SPawel Mollclean: archclean vmlinuxclean
14211da177e4SLinus Torvalds
14221da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
14231da177e4SLinus Torvalds#
14241da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
14251da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1426cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
14271da177e4SLinus Torvalds
1428b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
14291da177e4SLinus Torvalds$(mrproper-dirs):
14301da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
14311da177e4SLinus Torvalds
1432b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
14331da177e4SLinus Torvalds	$(call cmd,rmdirs)
14341da177e4SLinus Torvalds	$(call cmd,rmfiles)
14351da177e4SLinus Torvalds
14361da177e4SLinus Torvalds# distclean
14371da177e4SLinus Torvalds#
143846457133SMasahiro Yamadadistclean: rm-dirs  := $(wildcard $(DISTCLEAN_DIRS))
143946457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
144046457133SMasahiro Yamada
14414f193362SPaul SmithPHONY += distclean
14421da177e4SLinus Torvalds
14431da177e4SLinus Torvaldsdistclean: mrproper
144446457133SMasahiro Yamada	$(call cmd,rmdirs)
144546457133SMasahiro Yamada	$(call cmd,rmfiles)
14461da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
14471da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1448f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1449f78271dfSMasahiro Yamada		-o -name 'core' \) \
14501da177e4SLinus Torvalds		-type f -print | xargs rm -f
14511da177e4SLinus Torvalds
14521da177e4SLinus Torvalds
14531da177e4SLinus Torvalds# Packaging of the kernel to various formats
14541da177e4SLinus Torvalds# ---------------------------------------------------------------------------
14551da177e4SLinus Torvalds
1456bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1457000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1458031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1459000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
14601da177e4SLinus Torvalds
14611da177e4SLinus Torvalds# Brief documentation of the typical targets used
14621da177e4SLinus Torvalds# ---------------------------------------------------------------------------
14631da177e4SLinus Torvalds
14645dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1465a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
14665dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
14675dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
14681da177e4SLinus Torvalds
1469fe69b420SMasahiro YamadaPHONY += help
14701da177e4SLinus Torvaldshelp:
14711da177e4SLinus Torvalds	@echo  'Cleaning targets:'
14725ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
14735cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
14745ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
14755cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
14761da177e4SLinus Torvalds	@echo  ''
14771da177e4SLinus Torvalds	@echo  'Configuration targets:'
14781da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
14791da177e4SLinus Torvalds	@echo  ''
14801da177e4SLinus Torvalds	@echo  'Other generic targets:'
14811da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
14821da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
14831da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
14849cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
14851da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
148640ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1487433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1488433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
148962718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
149062718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1491155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1492c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
14931da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
14941da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1495f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
14963f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
14973f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
14983f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
14992fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
150059df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
15012fb9b1bdSSam Ravnborg	 echo  ''
150231b8cc80SRandy Dunlap	@echo  'Static analysers:'
15031da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
15041da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1505aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1506ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1507295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
150874425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
15097f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
151074425eeeSNicolas Palix	@echo  ''
1511eb8305aeSMatthias Maennich	@echo  'Tools:'
1512eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1513eb8305aeSMatthias Maennich	@echo  ''
151431b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1515e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
15165a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
15175a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1518e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1519e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1520e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1521dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1522e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1523e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
15245a5da78bSShuah Khan	@echo  ''
152537c8a5faSRob Herring	@$(if $(dtstree), \
152637c8a5faSRob Herring		echo 'Devicetree:'; \
152737c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
152837c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
15297aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
15307aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
153137c8a5faSRob Herring		echo '')
153237c8a5faSRob Herring
153331b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
153431b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
153531b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
153631b8cc80SRandy Dunlap	@echo  ''
15371da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1538000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
15391da177e4SLinus Torvalds	@echo  ''
15401da177e4SLinus Torvalds	@echo  'Documentation targets:'
1541cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
15421da177e4SLinus Torvalds	@echo  ''
154301dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
15441da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
154501dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
15461da177e4SLinus Torvalds	@echo  ''
15471da177e4SLinus Torvalds	@$(if $(boards), \
15481da177e4SLinus Torvalds		$(foreach b, $(boards), \
15494234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
15501da177e4SLinus Torvalds		echo '')
15515dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
15525dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
15535dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
15545dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
15555dffbe81SSegher Boessenkool		echo '')
15561da177e4SLinus Torvalds
15571da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
155845d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
15591da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1560a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1561a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1562701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1563af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1564e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
156528bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
156628bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
156728bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1568a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
15691da177e4SLinus Torvalds	@echo  ''
15701da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
15711da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
15721da177e4SLinus Torvalds
15731da177e4SLinus Torvalds
15745dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
15755dffbe81SSegher Boessenkool
15765dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
15775dffbe81SSegher Boessenkool
1578fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
15795dffbe81SSegher Boessenkool
15805dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
15815dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
15825dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
15835dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
15845dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
15855dffbe81SSegher Boessenkool		echo '')
15865dffbe81SSegher Boessenkool
15875dffbe81SSegher Boessenkool
15881da177e4SLinus Torvalds# Documentation targets
15891da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1590e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1591e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
159222cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1593bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1594cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
15951da177e4SLinus Torvalds
159667274c08SMasahiro Yamada# Misc
159767274c08SMasahiro Yamada# ---------------------------------------------------------------------------
159867274c08SMasahiro Yamada
159967274c08SMasahiro YamadaPHONY += scripts_gdb
16007a739ce5SMasahiro Yamadascripts_gdb: prepare0
16011e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
16028d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
160367274c08SMasahiro Yamada
160467274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
160567274c08SMasahiro Yamadaall: scripts_gdb
160667274c08SMasahiro Yamadaendif
160767274c08SMasahiro Yamada
16081da177e4SLinus Torvaldselse # KBUILD_EXTMOD
16091da177e4SLinus Torvalds
16101da177e4SLinus Torvalds###
16111da177e4SLinus Torvalds# External module support.
16121da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
16131da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
16141da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
16151da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
16161da177e4SLinus Torvalds# be used.
16171da177e4SLinus Torvalds#
16181da177e4SLinus Torvalds# The following are the only valid targets when building external
16191da177e4SLinus Torvalds# modules.
16201da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
16211da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
16221da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
16231da177e4SLinus Torvalds# make M=dir modules_install
1624070b98bfSSam Ravnborg#                      Install the modules built in the module directory
16251da177e4SLinus Torvalds#                      Assumes install directory is already created
16261da177e4SLinus Torvalds
16271da177e4SLinus Torvalds# We are always building modules
16281da177e4SLinus TorvaldsKBUILD_MODULES := 1
16291da177e4SLinus Torvalds
16304f193362SPaul SmithPHONY += $(objtree)/Module.symvers
16311da177e4SLinus Torvalds$(objtree)/Module.symvers:
16321da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
16331da177e4SLinus Torvalds	echo; \
16341da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
16351da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
16361da177e4SLinus Torvalds	echo )
16371da177e4SLinus Torvalds
1638c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1639c99f3918SMasahiro YamadaPHONY += modules
1640c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers
1641b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
16421da177e4SLinus Torvalds
16434f193362SPaul SmithPHONY += modules_install
1644a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1645a67dc21aSSam Ravnborg
1646a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
16474f193362SPaul SmithPHONY += _emodinst_
1648a67dc21aSSam Ravnborg_emodinst_:
1649a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1650b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
16511da177e4SLinus Torvalds
16524f193362SPaul SmithPHONY += _emodinst_post
1653a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1654a67dc21aSSam Ravnborg	$(call cmd,depmod)
1655a67dc21aSSam Ravnborg
165676cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
1657bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
16581da177e4SLinus Torvalds
1659d4945049SMasahiro YamadaPHONY += /
1660d4945049SMasahiro Yamada/:
1661d4945049SMasahiro Yamada	@echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1662d4945049SMasahiro Yamada
1663fe69b420SMasahiro YamadaPHONY += help
16641da177e4SLinus Torvaldshelp:
16651da177e4SLinus Torvalds	@echo  '  Building external modules.'
16661da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
16671da177e4SLinus Torvalds	@echo  ''
16681da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
16691da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
16701da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
16711da177e4SLinus Torvalds	@echo  ''
167206300b21SSam Ravnborg
1673059bc9fcSMasahiro YamadaPHONY += prepare
16741da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
16751da177e4SLinus Torvalds
1676b1fbfcb4SMasahiro Yamada# Single targets
1677b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1678b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1679b1fbfcb4SMasahiro Yamada#
1680b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1681b1fbfcb4SMasahiro Yamada#
1682b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1683b1fbfcb4SMasahiro Yamada#
1684b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1685b1fbfcb4SMasahiro Yamada#
1686b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1687b1fbfcb4SMasahiro Yamada
1688b1fbfcb4SMasahiro Yamadaifdef single-build
1689b1fbfcb4SMasahiro Yamada
1690b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1691b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1692b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1693b1fbfcb4SMasahiro Yamada
1694b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1695b1fbfcb4SMasahiro Yamada	@:
1696b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1697b1fbfcb4SMasahiro Yamada	@:
1698b1fbfcb4SMasahiro Yamada
1699b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1700b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1701b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1702b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1703b1fbfcb4SMasahiro Yamadaendif
1704b1fbfcb4SMasahiro Yamada
1705b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1706b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko)
1707b1fbfcb4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1708b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1709b1fbfcb4SMasahiro Yamada
1710b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1711b1fbfcb4SMasahiro Yamada
1712b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1713b1fbfcb4SMasahiro Yamada
1714b1fbfcb4SMasahiro Yamada# trim unrelated directories
1715b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1716b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1717b1fbfcb4SMasahiro Yamada
1718b1fbfcb4SMasahiro Yamadaendif
1719b1fbfcb4SMasahiro Yamada
1720c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1721c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1722c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1723c99f3918SMasahiro Yamada# make menuconfig etc.
1724c99f3918SMasahiro Yamada# Error messages still appears in the original language
1725c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1726c99f3918SMasahiro Yamadadescend: $(build-dirs)
1727c99f3918SMasahiro Yamada$(build-dirs): prepare
1728b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
1729f566e1fbSMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \
1730b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
1731c99f3918SMasahiro Yamada
173276cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
173376cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
173476cd306dSMasahiro Yamada$(clean-dirs):
173576cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
173676cd306dSMasahiro Yamada
173788d7be03SMichal Marekclean: $(clean-dirs)
173888d7be03SMichal Marek	$(call cmd,rmdirs)
173988d7be03SMichal Marek	$(call cmd,rmfiles)
174043f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1741ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
17424f0e3a57SRob Herring		-o -name '*.ko.*' \
17434f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1744ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1745bbc55bdeSMasahiro Yamada		-o -name '*.su' -o -name '*.mod' \
174688d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
17479a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
17484fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
174988d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
17508b41fc44SMasahiro Yamada		-o -name '.tmp_*.o.*' \
17516b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1752433db3e2SVinícius Tinti		-o -name '*.ll' \
175388d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
175488d7be03SMichal Marek
17551da177e4SLinus Torvalds# Generate tags for editors
17561da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1757a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1758858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
17591da177e4SLinus Torvalds
1760f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
17611da177e4SLinus Torvalds	$(call cmd,tags)
17621da177e4SLinus Torvalds
1763eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1764eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1765eb8305aeSMatthias Maennich
1766eb8305aeSMatthias MaennichPHONY += nsdeps
1767bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1768eb8305aeSMatthias Maennichnsdeps: modules
1769bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1770eb8305aeSMatthias Maennich
17711da177e4SLinus Torvalds# Scripts to check various things for consistency
17721da177e4SLinus Torvalds# ---------------------------------------------------------------------------
17731da177e4SLinus Torvalds
1774279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1775279f3dd3SPeter Foley
17761da177e4SLinus Torvaldsincludecheck:
1777436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
17781da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
177980007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
17801da177e4SLinus Torvalds
17811da177e4SLinus Torvaldsversioncheck:
17822ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
17831da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
178480007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
17851da177e4SLinus Torvalds
178674425eeeSNicolas Palixcoccicheck:
1787858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
178874425eeeSNicolas Palix
17891da177e4SLinus Torvaldsnamespacecheck:
17901da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
17911da177e4SLinus Torvalds
1792295ac051SAdrian Bunkexport_report:
1793295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1794295ac051SAdrian Bunk
1795c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1796e3ccf6e3SJeff Dike
1797011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1798011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1799011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1800011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1801011e3a9aSJeff Dikeifeq ($(ARCH), um)
1802011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1803011e3a9aSJeff Dikeelse
1804011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1805011e3a9aSJeff Dikeendif
18061da177e4SLinus Torvaldscheckstack:
18071da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
180875dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
18091da177e4SLinus Torvalds
18107b8ea53dSAmerigo Wangkernelrelease:
18117b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
181201ab1788SAmerigo Wang
1813cb58455cSSam Ravnborgkernelversion:
18142244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
18151da177e4SLinus Torvalds
1816c398ff00SMike Marciniszynimage_name:
1817c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1818c398ff00SMike Marciniszyn
1819ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1820f47a23ceSMasahiro Yamada
1821f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1822f47a23ceSMasahiro Yamadatools_silent=s
1823f47a23ceSMasahiro Yamadaendif
1824f47a23ceSMasahiro Yamada
1825ea01fa9fSBorislav Petkovtools/: FORCE
1826bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
182775dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1828ea01fa9fSBorislav Petkov
1829ea01fa9fSBorislav Petkovtools/%: FORCE
1830bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
183175dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1832ea01fa9fSBorislav Petkov
18331da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
18341da177e4SLinus Torvalds# ===========================================================================
18351da177e4SLinus Torvalds
18361da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
18371da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
18381da177e4SLinus Torvalds
18391da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
18401da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
18411da177e4SLinus Torvalds
1842bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
184350a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1844569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
18455a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
184650a8ec31SSam Ravnborg
1847392885eeSMasahiro Yamada# read saved command lines for existing targets
1848392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
18491da177e4SLinus Torvalds
1850b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
18511da177e4SLinus Torvalds
185246b7c492SSZ Lin (林上智)endif # config-build
18532042b548SMasahiro Yamadaendif # mixed-build
1854688931a5SMasahiro Yamadaendif # need-sub-make
18551da177e4SLinus Torvalds
18564f193362SPaul SmithPHONY += FORCE
18571da177e4SLinus TorvaldsFORCE:
18584f193362SPaul Smith
1859bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1860fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
18614f193362SPaul Smith.PHONY: $(PHONY)
1862