xref: /openbmc/linux/Makefile (revision bff9c62b5d20d26f54bab81b33b6d9d1f9afcdf6)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
354ecb8f7SLinus TorvaldsPATCHLEVEL = 4
455922c9dSLinus TorvaldsSUBLEVEL = 0
531f4f5b4SLinus TorvaldsEXTRAVERSION = -rc7
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 $@ :<
68066b7ed9SMichal Marek#
69066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
70066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
71066b7ed9SMichal Marek#
721da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
731da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
741da177e4SLinus Torvalds
751da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
761da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
771da177e4SLinus Torvaldsendif
781da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
791da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
801da177e4SLinus Torvaldsendif
811da177e4SLinus Torvalds
82066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
83066b7ed9SMichal Marek  quiet =
84066b7ed9SMichal Marek  Q =
85066b7ed9SMichal Marekelse
86066b7ed9SMichal Marek  quiet=quiet_
87066b7ed9SMichal Marek  Q = @
88066b7ed9SMichal Marekendif
89066b7ed9SMichal Marek
90066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
91066b7ed9SMichal Marek# commands
92066b7ed9SMichal Marek
936f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
94066b7ed9SMichal Marek  quiet=silent_
95066b7ed9SMichal Marekendif
96066b7ed9SMichal Marek
97066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
98066b7ed9SMichal Marek
9925b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
10025b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
10125b146c5SMasahiro Yamada#
10225b146c5SMasahiro Yamada# For example, you can do this:
10325b146c5SMasahiro Yamada#
10425b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
10525b146c5SMasahiro Yamada#
10625b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
10725b146c5SMasahiro Yamada# two syntaxes to specify it.
10825b146c5SMasahiro Yamada#
1091da177e4SLinus Torvalds# 1) O=
1101da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1111da177e4SLinus Torvalds#
1121da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
11325b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
11425b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1151da177e4SLinus Torvalds#
1161da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1171da177e4SLinus Torvalds# variable.
1181da177e4SLinus Torvalds
11925b146c5SMasahiro Yamada# Do we want to change the working directory?
1201da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1211da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1221da177e4SLinus Torvaldsendif
1231da177e4SLinus Torvalds
12425b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
12525b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
12625b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
12725b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
12825b146c5SMasahiro Yamada$(if $(abs_objtree),, \
12925b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
13025b146c5SMasahiro Yamada
13125b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
13225b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
13325b146c5SMasahiro Yamadaelse
13425b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
13525b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
13625b146c5SMasahiro Yamada
13725b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
13825b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
13925b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
14025b146c5SMasahiro Yamadaelse
14125b146c5SMasahiro Yamadaneed-sub-make := 1
14251193b76SRobert Jarzmikendif
14351193b76SRobert Jarzmik
14425b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
1451da177e4SLinus Torvalds
14625b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
14725b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
14825b146c5SMasahiro Yamadaendif
14925b146c5SMasahiro Yamada
15025b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
15180463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
15280463f1bSMasahiro Yamada#
15380463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
15425b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
15525b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
156688931a5SMasahiro Yamadaneed-sub-make := 1
15725b146c5SMasahiro Yamadaendif
1583812b8c5SMasahiro Yamada
159688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
160688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
161688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
162688931a5SMasahiro Yamadaneed-sub-make := 1
163688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
164688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ;
165688931a5SMasahiro Yamadaendif
166688931a5SMasahiro Yamada
16725b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
168221cc2d2SMasahiro Yamadaexport sub_make_done := 1
169221cc2d2SMasahiro Yamada
170688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
171688931a5SMasahiro Yamada
1720b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
1730b35786dSMilton Miller
1740209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
17516f89098SCharles Keepax	@:
1760b35786dSMilton Miller
177c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
1782e8d696bSMasahiro Yamadasub-make:
17925b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
1801da177e4SLinus Torvalds
181688931a5SMasahiro Yamadaendif # need-sub-make
182221cc2d2SMasahiro Yamadaendif # sub_make_done
183688931a5SMasahiro Yamada
1841da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
185688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
1861da177e4SLinus Torvalds
1877ff52571SMasahiro Yamada# Do not print "Entering directory ...",
1887ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
1897ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
1907ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
1917ff52571SMasahiro Yamada
192aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
193aa55c8e2SMasahiro Yamada# C compilation.
194aa55c8e2SMasahiro Yamada#
195aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
196aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
197aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
198aa55c8e2SMasahiro Yamada#
199036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
200036db11cSCao jin# including where to get the "sparse" utility.
201aa55c8e2SMasahiro Yamada
202aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
203aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
204aa55c8e2SMasahiro Yamadaendif
205aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
206aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
207aa55c8e2SMasahiro Yamadaendif
208aa55c8e2SMasahiro Yamada
2097e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
2107e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
211aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
212aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
213aa55c8e2SMasahiro Yamadaendif
214aa55c8e2SMasahiro Yamada
215051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD
216051f278eSMasahiro Yamada
217394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
218394053f4SMasahiro Yamada
21925b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
2209da0763bSMichal Marek        # building in the source tree
2219da0763bSMichal Marek        srctree := .
222051f278eSMasahiro Yamada	building_out_of_srctree :=
2239da0763bSMichal Marekelse
22425b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
2259da0763bSMichal Marek                # building in a subdirectory of the source tree
2269da0763bSMichal Marek                srctree := ..
2279da0763bSMichal Marek        else
22825b146c5SMasahiro Yamada                srctree := $(abs_srctree)
2299da0763bSMichal Marek        endif
230051f278eSMasahiro Yamada	building_out_of_srctree := 1
2319da0763bSMichal Marekendif
2322c1f4f12SMasahiro Yamada
23395fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
23495fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
23595fd3f87SMasahiro Yamadaendif
2362c1f4f12SMasahiro Yamada
2377e1c0477SMichal Marekobjtree		:= .
2386b12de69SMasahiro YamadaVPATH		:= $(srctree)
2391da177e4SLinus Torvalds
240051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
2411da177e4SLinus Torvalds
2422c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2432c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2442c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2452c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2462c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2472c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2482c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2492c1f4f12SMasahiro Yamada
2502c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2512c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
2522c1f4f12SMasahiro Yamada
25322340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
25422340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2552c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
25659b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
25763e31a67SMasahiro Yamada			 %asm-generic kernelversion %src-pkg
258a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \
259a29d4d8cSMasahiro Yamada			   kernelrelease
260394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
2612c1f4f12SMasahiro Yamada
2622042b548SMasahiro Yamadaconfig-build	:=
2632042b548SMasahiro Yamadamixed-build	:=
2642042b548SMasahiro Yamadaneed-config	:= 1
265d7942413SMasahiro Yamadamay-sync-config	:= 1
266394053f4SMasahiro Yamadasingle-build	:=
2672c1f4f12SMasahiro Yamada
2682c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2692c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2702042b548SMasahiro Yamada		need-config :=
2712c1f4f12SMasahiro Yamada	endif
2722c1f4f12SMasahiro Yamadaendif
2732c1f4f12SMasahiro Yamada
274d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
275d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
2762042b548SMasahiro Yamada		may-sync-config :=
277d7942413SMasahiro Yamada	endif
278d7942413SMasahiro Yamadaendif
279d7942413SMasahiro Yamada
280d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
2812042b548SMasahiro Yamada	may-sync-config :=
282d7942413SMasahiro Yamadaendif
283d7942413SMasahiro Yamada
2842c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
2852c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
2862042b548SMasahiro Yamada		config-build := 1
2872c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
2882042b548SMasahiro Yamada			mixed-build := 1
2892c1f4f12SMasahiro Yamada                endif
2902c1f4f12SMasahiro Yamada        endif
2912c1f4f12SMasahiro Yamadaendif
29222340a06SMasahiro Yamada
293394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
294394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
295394053f4SMasahiro Yamada	single-build := 1
296394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
297394053f4SMasahiro Yamada		mixed-build := 1
298394053f4SMasahiro Yamada	endif
299394053f4SMasahiro Yamadaendif
300394053f4SMasahiro Yamada
30122340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
30222340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
30322340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3042042b548SMasahiro Yamada		mixed-build := 1
30522340a06SMasahiro Yamada        endif
30622340a06SMasahiro Yamadaendif
30722340a06SMasahiro Yamada
3082c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3092c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3102c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3112042b548SMasahiro Yamada		mixed-build := 1
3122c1f4f12SMasahiro Yamada        endif
3132c1f4f12SMasahiro Yamadaendif
3142c1f4f12SMasahiro Yamada
3152042b548SMasahiro Yamadaifdef mixed-build
3162c1f4f12SMasahiro Yamada# ===========================================================================
3172c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3182c1f4f12SMasahiro Yamada# Handle them one by one.
3192c1f4f12SMasahiro Yamada
3202c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3212c1f4f12SMasahiro Yamada
3222c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
3232c1f4f12SMasahiro Yamada	@:
3242c1f4f12SMasahiro Yamada
3252c1f4f12SMasahiro Yamada__build_one_by_one:
3262c1f4f12SMasahiro Yamada	$(Q)set -e; \
3272c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3282c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3292c1f4f12SMasahiro Yamada	done
3302c1f4f12SMasahiro Yamada
3312042b548SMasahiro Yamadaelse # !mixed-build
3322c1f4f12SMasahiro Yamada
3332c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
3342c1f4f12SMasahiro Yamada
3352c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3362c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3372c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3382c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3392c1f4f12SMasahiro Yamada
340b2d35fa5SAnders Roxellinclude scripts/subarch.include
3411da177e4SLinus Torvalds
3421da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3431da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3441da177e4SLinus Torvalds#
3451da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3461da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3471da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3481da177e4SLinus Torvalds# make ARCH=ia64
3491da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3501da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3511da177e4SLinus Torvalds
3521da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3531da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3541da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3551da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3561da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3571da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3581da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3591da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3602331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3611da177e4SLinus Torvalds
3621da177e4SLinus Torvalds# Architecture as present in compile.h
3631da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3646752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3651da177e4SLinus Torvalds
366d746d647SSam Ravnborg# Additional ARCH settings for x86
367d746d647SSam Ravnborgifeq ($(ARCH),i386)
368d746d647SSam Ravnborg        SRCARCH := x86
369d746d647SSam Ravnborgendif
370d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
371d746d647SSam Ravnborg        SRCARCH := x86
372d746d647SSam Ravnborgendif
37374b469f2SSam Ravnborg
3745e538790SSam Ravnborg# Additional ARCH settings for sparc
375e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
376e69f58c0SNamhyung Kim       SRCARCH := sparc
377e69f58c0SNamhyung Kimendif
378a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
3795e538790SSam Ravnborg       SRCARCH := sparc
380a439fe51SSam Ravnborgendif
3812fb9b1bdSSam Ravnborg
3823cc000b5SPaul Mundt# Additional ARCH settings for sh
3833cc000b5SPaul Mundtifeq ($(ARCH),sh64)
3843cc000b5SPaul Mundt       SRCARCH := sh
3853cc000b5SPaul Mundtendif
3863cc000b5SPaul Mundt
38714cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
38841263fc6SBen Gardinerexport KCONFIG_CONFIG
38914cdd3c4SRoman Zippel
3901da177e4SLinus Torvalds# SHELL used by kbuild
391858805b3SMasahiro YamadaCONFIG_SHELL := sh
3921da177e4SLinus Torvalds
3936d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
3946d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
3956d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
396d7f14c66SUwe Kleine-König
3971da177e4SLinus TorvaldsHOSTCC       = gcc
3981da177e4SLinus TorvaldsHOSTCXX      = g++
39996f14fe7SLaura AbbottKBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
400f92d19e0SLaura Abbott		-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
401f92d19e0SLaura Abbott		$(HOSTCFLAGS)
402f92d19e0SLaura AbbottKBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
403f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
404f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4051da177e4SLinus Torvalds
4061da177e4SLinus Torvalds# Make variables (CC, etc...)
4071da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
4081da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
4091da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
4101da177e4SLinus TorvaldsCPP		= $(CC) -E
4111da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4121da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4131da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
4141da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4151da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
4167bac9870SVasily GorbikOBJSIZE		= $(CROSS_COMPILE)size
417e83b9f55SAndrii NakryikoPAHOLE		= pahole
41873a4f6dbSMasahiro YamadaLEX		= flex
41973a4f6dbSMasahiro YamadaYACC		= bison
4201da177e4SLinus TorvaldsAWK		= awk
421caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
4221da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
4231da177e4SLinus TorvaldsPERL		= perl
424011bf125SMasahiro YamadaPYTHON		= python
425e9781b52SMasahiro YamadaPYTHON2		= python2
426e9781b52SMasahiro YamadaPYTHON3		= python3
4271da177e4SLinus TorvaldsCHECK		= sparse
428858805b3SMasahiro YamadaBASH		= bash
4291da177e4SLinus Torvalds
43080a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4316c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4320c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4336588169dSSam RavnborgCFLAGS_MODULE   =
4346588169dSSam RavnborgAFLAGS_MODULE   =
4356588169dSSam RavnborgLDFLAGS_MODULE  =
4361da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4371da177e4SLinus TorvaldsAFLAGS_KERNEL	=
438b36fad65SMichal MarekLDFLAGS_vmlinux =
4391da177e4SLinus Torvalds
440abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
441abbf1590SDavid HowellsUSERINCLUDE    := \
4429d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4439d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
444abbf1590SDavid Howells		-I$(srctree)/include/uapi \
4453308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
446abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
447abbf1590SDavid Howells
4481da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
4491da177e4SLinus Torvalds# Needed to be compatible with the O= option
450abbf1590SDavid HowellsLINUXINCLUDE    := \
4519d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
4529d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
453051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
454f8224f7fSMasahiro Yamada		-I$(objtree)/include \
455f8224f7fSMasahiro Yamada		$(USERINCLUDE)
4561da177e4SLinus Torvalds
45742a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
458eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
45942a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
460b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
46151b97e35SKirill A. Shutemov		   -Wno-format-security \
462433dc2ebSMasahiro Yamada		   -std=gnu89
463433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
46480c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
46580c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
4666588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
4676588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
46810df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
46910df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
470d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
471433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
4725241ab4cSMasahiro YamadaCLANG_FLAGS :=
4731da177e4SLinus Torvalds
474858805b3SMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
4757bac9870SVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL
4767bac9870SVasily Gorbikexport PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
4777bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
4781da177e4SLinus Torvalds
479d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
4800e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
4810e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
482222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
4836588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
48480c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
4851da177e4SLinus Torvalds
4861da177e4SLinus Torvalds# Files to ignore in find ... statements
4871da177e4SLinus Torvalds
488ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
489ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
490ae63b2d7SPrarit Bhargava			  -prune -o
491450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
492450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
4931da177e4SLinus Torvalds
4941da177e4SLinus Torvalds# ===========================================================================
4951da177e4SLinus Torvalds# Rules shared between *config targets and build targets
4961da177e4SLinus Torvalds
497312a3d09SCao jin# Basic helpers built in scripts/basic/
4984f193362SPaul SmithPHONY += scripts_basic
4991da177e4SLinus Torvaldsscripts_basic:
5001da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
501638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
5021da177e4SLinus Torvalds
5034f193362SPaul SmithPHONY += outputmakefile
504e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
505fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
506fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
507fd5f0cd6SJan Beulich# output directory.
5083a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5093a51ff34SVladimir Kondratiev# ignore whole output directory
5101da177e4SLinus Torvaldsoutputmakefile:
511051f278eSMasahiro Yamadaifdef building_out_of_srctree
512e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
513e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
514e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
515e8e83a23SMasahiro Yamada		echo >&2 "***"; \
516e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
517e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
518e8e83a23SMasahiro Yamada		echo >&2 "***"; \
519e8e83a23SMasahiro Yamada		false; \
520e8e83a23SMasahiro Yamada	fi
52192979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5224fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
523156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
524156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
525fd5f0cd6SJan Beulichendif
5261da177e4SLinus Torvalds
52799516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
528ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
5295241ab4cSMasahiro YamadaCLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
530ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
531238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)
532ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
533ae6b289aSChris Friesendif
534ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
535238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
536ae6b289aSChris Friesendif
537876a0600SNathan Chancellorifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),)
538238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
539876a0600SNathan Chancellorendif
540589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
541238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
542238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
5433bd98050SJoel Stanleyexport CLANG_FLAGS
544ae6b289aSChris Friesendif
545ae6b289aSChris Fries
546315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
547315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
548315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
549315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
550902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
551315bab4eSMasahiro Yamada
5522042b548SMasahiro Yamadaifdef config-build
5531da177e4SLinus Torvalds# ===========================================================================
5541da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
5551da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
5561da177e4SLinus Torvalds
5571da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
5581da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
5591da177e4SLinus Torvalds# used for 'make defconfig'
560a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
561315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
5621da177e4SLinus Torvalds
56336de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
56431110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
56531110ebbSSam Ravnborg
56636de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
5671da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
5681da177e4SLinus Torvalds
5692042b548SMasahiro Yamadaelse #!config-build
5701da177e4SLinus Torvalds# ===========================================================================
5711da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
5721da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
5731da177e4SLinus Torvalds
5742c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
5752c1f4f12SMasahiro Yamada# but instead _all depend on modules
5762c1f4f12SMasahiro YamadaPHONY += all
5772c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
5782c1f4f12SMasahiro Yamada_all: all
5792c1f4f12SMasahiro Yamadaelse
5802c1f4f12SMasahiro Yamada_all: modules
5812c1f4f12SMasahiro Yamadaendif
5822c1f4f12SMasahiro Yamada
5832c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
5842c1f4f12SMasahiro Yamada# Normally, just do built-in.
5852c1f4f12SMasahiro Yamada
5862c1f4f12SMasahiro YamadaKBUILD_MODULES :=
5872c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
5882c1f4f12SMasahiro Yamada
5892c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
5902c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider
5912c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to
5922c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them.
5932c1f4f12SMasahiro Yamada
5942c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
5952c1f4f12SMasahiro Yamada  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
5962c1f4f12SMasahiro Yamadaendif
5972c1f4f12SMasahiro Yamada
5982c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
5992c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
6002c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
6012c1f4f12SMasahiro Yamada
602d85103acSMasahiro Yamadaifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
6032c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6042c1f4f12SMasahiro Yamadaendif
6052c1f4f12SMasahiro Yamada
6062c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6072c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6082c1f4f12SMasahiro Yamadaendif
6092c1f4f12SMasahiro Yamada
6102c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6112c1f4f12SMasahiro Yamada
6122042b548SMasahiro Yamadaifdef need-config
613d93a18f2SMasahiro Yamadainclude include/config/auto.conf
614d93a18f2SMasahiro Yamadaendif
615d93a18f2SMasahiro Yamada
6161da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6171da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
6181da177e4SLinus Torvaldsinit-y		:= init/
619f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
620d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
62143c78d88SMasahiro Yamadadrivers-$(CONFIG_KERNEL_HEADER_TEST) += include/
6221da177e4SLinus Torvaldsnet-y		:= net/
6231da177e4SLinus Torvaldslibs-y		:= lib/
6241da177e4SLinus Torvaldscore-y		:= usr/
62537d9fe47SFeng Wuvirt-y		:= virt/
6261da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6271da177e4SLinus Torvalds
628315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
629315bab4eSMasahiro Yamada# command line.
630315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
631315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
632315bab4eSMasahiro Yamadaall: vmlinux
633315bab4eSMasahiro Yamada
634315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
635315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
636315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
6375aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
638315bab4eSMasahiro Yamada
639b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
640b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
641b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
642b1f4ff74SPaulo Zanoniendif
643b1f4ff74SPaulo Zanoni
644669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
645669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
646669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
647669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
648669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
649669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
650669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
651669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
652669e06b1SMasahiro Yamada
653315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
654315bab4eSMasahiro Yamada
6552042b548SMasahiro Yamadaifdef need-config
6562042b548SMasahiro Yamadaifdef may-sync-config
657315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
658315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
659315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
660d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
6611da177e4SLinus Torvalds
66205850719SMasahiro Yamada$(KCONFIG_CONFIG):
66305850719SMasahiro Yamada	@echo >&2 '***'
66405850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
66505850719SMasahiro Yamada	@echo >&2 '***'
66605850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
66705850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
66805850719SMasahiro Yamada	@echo >&2 '***'
66905850719SMasahiro Yamada	@/bin/false
6701da177e4SLinus Torvalds
67161277981SUlf Magnusson# The actual configuration files used during the build are stored in
67261277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
67361277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
6749390dff6SMasahiro Yamada#
6759390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
6769390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
6779390dff6SMasahiro Yamada%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
678911a91c3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
6792042b548SMasahiro Yamadaelse # !may-sync-config
680d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
681d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
682d7942413SMasahiro Yamada# Use auto.conf to trigger the test
6839ee4e336SSam RavnborgPHONY += include/config/auto.conf
6849ee4e336SSam Ravnborg
6859ee4e336SSam Ravnborginclude/config/auto.conf:
686264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
6875369f550SMichal Marek	echo >&2;							\
6885369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
6895369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
6905369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
6915369f550SMichal Marek	echo >&2 ;							\
6929ee4e336SSam Ravnborg	/bin/false)
6939ee4e336SSam Ravnborg
694d7942413SMasahiro Yamadaendif # may-sync-config
6952042b548SMasahiro Yamadaendif # need-config
6961da177e4SLinus Torvalds
697a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
698ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
699bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
700bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7016f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
702a1c48bb1SGeert Uytterhoeven
70315f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
704a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
70515f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
70615f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3
70715f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
70815f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
7091da177e4SLinus Torvaldsendif
7101da177e4SLinus Torvalds
711b303c6dfSMasahiro Yamadaifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
712b303c6dfSMasahiro YamadaKBUILD_CFLAGS   += -Wno-maybe-uninitialized
713b303c6dfSMasahiro Yamadaendif
714a76bcf55SArnd Bergmann
71569102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
71669102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
71769102311SJiri Kosina
718d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov
7196b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
7206b90bd4bSEmese Revfy
7211873e870SAndi Kleenifdef CONFIG_READABLE_ASM
7221873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
7231873e870SAndi Kleen# reorder blocks reorders the control in the function
7241873e870SAndi Kleen# ipa clone creates specialized cloned functions
7251873e870SAndi Kleen# partial inlining inlines only parts of functions
7261873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
7271873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
7281873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
7291873e870SAndi Kleenendif
7301873e870SAndi Kleen
73108f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
73235bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
73335bb5b1eSAndi Kleenendif
73435bb5b1eSAndi Kleen
7352a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
736050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
737050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
7382a61f474SMasahiro Yamada
7392a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
740e06b8b98SSam Ravnborg
741076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
742a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
743a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier
744a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
745cfe17c9bSMasahiro Yamada# Quiet clang warning: comparison of unsigned expression < 0 is always false
746a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-tautological-compare
747cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
748cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
749cfe17c9bSMasahiro Yamada# See modpost pattern 2
750a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge
751cfe17c9bSMasahiro Yamadaelse
752cfe17c9bSMasahiro Yamada
753cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
754cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
7559df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable
756e2079e93SNathan Chancellor
757e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement.
758e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and
759e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
760e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
761cfe17c9bSMasahiro Yamadaendif
762cfe17c9bSMasahiro Yamada
7630a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
7641da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
765a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
7661da177e4SLinus Torvaldselse
7677e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
7687e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
7697e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
7707e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
7717e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
7727e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
773a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
7741da177e4SLinus Torvaldsendif
7757e9501fdSRabin Vincentendif
7761da177e4SLinus Torvalds
777709a972eSKees Cook# Initialize all stack variables with a pattern, if desired.
778709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL
779709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
780709a972eSKees Cookendif
781709a972eSKees Cook
7821e88e415SMasahiro YamadaDEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
7832062afb4SLinus Torvalds
7841da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
785866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
7869d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
787866ced95SAndi Kleenelse
7881e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
789866ced95SAndi Kleenendif
7902288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
7911da177e4SLinus Torvaldsendif
792bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
7939d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
794bfaf2dd3SAndi Kleenendif
7951da177e4SLinus Torvalds
796d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
7971e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
798e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
799d6f4ceb7SAndi Kleenendif
800d6f4ceb7SAndi Kleen
8011e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
8021e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
8031e88e415SMasahiro Yamada
804606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
80507d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
80607d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
80707d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
80807d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
80907d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
810a2546faeSSteven Rostedt  endif
8112f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8122f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8132f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8142f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8152f4df001SVasily Gorbik    endif
8162f4df001SVasily Gorbik  endif
81707d04081SVasily Gorbikendif
818a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
819f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
820f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
821f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
822a2546faeSSteven Rostedt  endif
823f28bc3c3SVasily Gorbikendif
824f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
825f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
826f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
82772441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
828cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
82972441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
83072441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
83172441cb1SSteven Rostedt	endif
83272441cb1SSteven Rostedtendif
83316444a8aSArnaldo Carvalho de Meloendif
83416444a8aSArnaldo Carvalho de Melo
83591341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
83691341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
83791341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
83891341d4bSSam Ravnborgendif
83991341d4bSSam Ravnborg
84090ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
841e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
842e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
84390ad4052SMasahiro Yamadaendif
84490ad4052SMasahiro Yamada
84543bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH
84643bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
84743bd3a95SMiroslav Benesendif
84843bd3a95SMiroslav Benes
849e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
850e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
851e8e69931SSam Ravnborg
8521da177e4SLinus Torvalds# warn about C99 declaration after statement
853a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
8541da177e4SLinus Torvalds
8550bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
8568289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
8570bb95f80SKees Cook
858070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
859fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
8601da177e4SLinus Torvalds
861217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
862217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
863217c3e01SStephen Rothwell
864fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
865a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
866d0115552SLinus Torvalds
86787e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this
86887e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we
86987e0d4f0SDaniel Borkmann# need to disable it here generally.
87087e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fno-merge-all-constants)
87187e0d4f0SDaniel Borkmann
87287e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine
87387e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled.
87487e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fmerge-constants)
87587e0d4f0SDaniel Borkmann
8763ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
8773ce120b1SLinus TorvaldsKBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
8783ce120b1SLinus Torvalds
8798f7f5c9fSAndi Kleen# conserve stack if available
8808f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
8818f7f5c9fSAndi Kleen
882fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
883fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
884fe7c36c7SJosh Triplett
885ea8daa7bSDaniel Wagner# enforce correct pointer usage
886ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
887ea8daa7bSDaniel Wagner
888c834f0e8SKees Cook# Require designated initializers for all marked structures
889c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
890c834f0e8SKees Cook
891a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
892a73619a8SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
893a73619a8SMasahiro Yamada
89429be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is
89529be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern
89629be86d7SSeth Forsheeifdef CONFIG_RETPOLINE
89729be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
89829be86d7SSeth Forsheeendif
89929be86d7SSeth Forshee
900a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
901a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
902c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
903a86fe353SMasahiro Yamada
9048cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
9058cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
9068cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
9078cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
90852bcc330SSam Ravnborg
90989ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id
91089ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id
91118991197SRoland McGrath
9125d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
913d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
9145d7d18f5SDavid Howellsendif
9155d7d18f5SDavid Howells
9165cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
9175cf896fbSPeter CollingbourneLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
9185cf896fbSPeter Collingbourneendif
9195cf896fbSPeter Collingbourne
92014516765SLuc Van Oostenryck# insure the checker run with the right endianness
92114516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
92214516765SLuc Van Oostenryck
9231f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
9241f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
9251f2f01b1SLuc Van Oostenryck
9261da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
9271da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
9281da177e4SLinus Torvalds# set in the environment
9291da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
9301da177e4SLinus Torvalds# this default value
9311da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
9321da177e4SLinus Torvalds
9331da177e4SLinus Torvalds#
9341da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
9351da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
9361da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
9371da177e4SLinus Torvalds
9381da177e4SLinus Torvalds#
939f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
940f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
941f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
942f4d4ffc0SJason Cooper#
943f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
944f4d4ffc0SJason Cooper
945f4d4ffc0SJason Cooper#
9461da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
9471da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
948070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
9491da177e4SLinus Torvalds#
9501da177e4SLinus Torvalds
951df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
9521da177e4SLinus Torvaldsexport MODLIB
9531da177e4SLinus Torvalds
954ac031f26STheodore Ts'o#
9552ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
9562ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
9572ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
958177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
9592ea03891SSam Ravnborg
960ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
961ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
9622ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
963ac031f26STheodore Ts'oelse
9642ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
965ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
966ac031f26STheodore Ts'oelse
9672ea03891SSam Ravnborgmod_strip_cmd = true
968ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
969ac031f26STheodore Ts'oexport mod_strip_cmd
970ac031f26STheodore Ts'o
971beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
972beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
973beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
974beb50df3SBertrand Jacquin
975beb50df3SBertrand Jacquinmod_compress_cmd = true
976beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
977beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
9783d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
979beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
980beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
9813d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
982beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
983beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
984beb50df3SBertrand Jacquinexport mod_compress_cmd
985beb50df3SBertrand Jacquin
986d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
9873ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
9883ee550f1SDavid Woodhouse
9893ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
990e2a666d5SRusty Russellelse
991e2a666d5SRusty Russellmod_sign_cmd = true
992e2a666d5SRusty Russellendif
993e2a666d5SRusty Russellexport mod_sign_cmd
994e2a666d5SRusty Russell
995056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
996056d28d1SRolf Eike Beer
9979f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
9989f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
999056d28d1SRolf Eike Beer		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
10009f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
10019f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
10029f0c18aeSJosh Poimboeuf  else
10039f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
10049f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
10059f0c18aeSJosh Poimboeuf  endif
10069f0c18aeSJosh Poimboeufendif
10079f0c18aeSJosh Poimboeuf
1008e00d8880SMasahiro YamadaPHONY += prepare0
1009e2a666d5SRusty Russell
1010394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order
101147801c97SMasahiro Yamada
10121da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1013cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
10141da177e4SLinus Torvalds
10151da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
10161da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
101737d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
10181da177e4SLinus Torvalds
10191eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
10201eaca4b9SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
10211eaca4b9SMasahiro Yamada			$(drivers-) $(net-) $(libs-) $(virt-))))
10221da177e4SLinus Torvalds
1023c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
102476cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1025c99f3918SMasahiro Yamada
1026f49821eeSNicholas Piggininit-y		:= $(patsubst %/, %/built-in.a, $(init-y))
1027f49821eeSNicholas Piggincore-y		:= $(patsubst %/, %/built-in.a, $(core-y))
1028f49821eeSNicholas Piggindrivers-y	:= $(patsubst %/, %/built-in.a, $(drivers-y))
1029f49821eeSNicholas Pigginnet-y		:= $(patsubst %/, %/built-in.a, $(net-y))
10301da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
1031f49821eeSNicholas Pigginlibs-y2		:= $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
1032f49821eeSNicholas Pigginvirt-y		:= $(patsubst %/, %/built-in.a, $(virt-y))
10331da177e4SLinus Torvalds
10341f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1035d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
1036d151e971SMasahiro Yamada			      $(drivers-y) $(net-y) $(virt-y)
10373a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1)
103895698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
10391f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
104085f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1041233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
10421da177e4SLinus Torvalds
1043d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
10441da177e4SLinus Torvalds
10453fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
10463fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
10472441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
1048c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order
1049ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
105086556392SNicolas Pitre	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
10512441e78bSNicolas Pitreendif
105223121ca2SNicolas Pitre
10531f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
10541f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
10551f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
10561f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS
10571f50b80aSMasahiro Yamada  KBUILD_MODULES := 1
10581f50b80aSMasahiro Yamadaendif
10591f50b80aSMasahiro Yamada
106007a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
106107a422bbSMasahiro Yamada
106207a422bbSMasahiro Yamada$(autoksyms_h):
106307a422bbSMasahiro Yamada	$(Q)mkdir -p $(dir $@)
106407a422bbSMasahiro Yamada	$(Q)touch $@
106523121ca2SNicolas Pitre
1066fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1067fbe6e37dSNicholas Piggin
1068fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1069fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
1070d503ac53SMasahiro Yamada	$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
1071fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
10722441e78bSNicolas Pitre
10733fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
10741f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1075741f98feSSam Ravnborg
1076392885eeSMasahiro Yamadatargets := vmlinux
1077392885eeSMasahiro Yamada
10781da177e4SLinus Torvalds# The actual objects are generated when descending,
10791da177e4SLinus Torvalds# make sure no implicit rule kicks in
1080c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ;
10811da177e4SLinus Torvalds
1082ba97df45SMasahiro Yamadafilechk_kernel.release = \
10830d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
10840d0e7718SMichal Marek
108583a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
108624512795SMasahiro Yamadainclude/config/kernel.release: FORCE
10870d0e7718SMichal Marek	$(call filechk,kernel.release)
1088cb58455cSSam Ravnborg
1089d8821622SMasahiro Yamada# Additional helpers built in scripts/
1090d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1091d8821622SMasahiro Yamada# in parallel
1092d8821622SMasahiro YamadaPHONY += scripts
109360df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1094d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1095cb58455cSSam Ravnborg
10961da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
10975bb78269SSam Ravnborg# or the modules are listed in "prepare".
10985bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
10995bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
11005bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
11011da177e4SLinus Torvalds
1102a5139fb3SMasahiro YamadaPHONY += prepare archprepare
11035bb78269SSam Ravnborg
110436de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
110530527cefSMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
11065bb78269SSam Ravnborg
110765bba042SMasahiro Yamadaprepare0: archprepare
110860df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
11098d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
111086feeaa8SSam Ravnborg
11111da177e4SLinus Torvalds# All the preparing..
1112b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1113b9ab5ebbSJosh Poimboeuf
11142c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
11157d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
11167d0e5c20SMasahiro Yamada
11172c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
11182c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1119037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1120037fc336SMasahiro Yamada	generic=include/asm-generic
11212c1f4f12SMasahiro Yamadauapi-asm-generic:
1122037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1123037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
11242c1f4f12SMasahiro Yamada
1125b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
11263b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1127ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1128ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1129ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1130ef7cfd00SMasahiro Yamada	@false
1131ef7cfd00SMasahiro Yamadaelse
1132ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1133ef7cfd00SMasahiro Yamadaendif
1134ef7cfd00SMasahiro Yamadaendif
11351da177e4SLinus Torvalds
11361da177e4SLinus Torvalds# Generate some files
11371da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11381da177e4SLinus Torvalds
11391da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
11401da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
11411da177e4SLinus Torvalds
11421da177e4SLinus Torvaldsuts_len := 64
114363104eecSSam Ravnborgdefine filechk_utsrelease.h
11441da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
11451da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
11461da177e4SLinus Torvalds	  exit 1;                                                         \
11471da177e4SLinus Torvalds	fi;                                                               \
1148ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
11491da177e4SLinus Torvaldsendef
11501da177e4SLinus Torvalds
115163104eecSSam Ravnborgdefine filechk_version.h
1152ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
115378d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1154ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
115563104eecSSam Ravnborgendef
115663104eecSSam Ravnborg
115743fee2b2SMasahiro Yamada$(version_h): FORCE
11581da177e4SLinus Torvalds	$(call filechk,version.h)
1159223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
11601da177e4SLinus Torvalds
1161273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
116263104eecSSam Ravnborg	$(call filechk,utsrelease.h)
116363104eecSSam Ravnborg
1164179efcb4SVegard NossumPHONY += headerdep
1165179efcb4SVegard Nossumheaderdep:
11669663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
11679663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1168179efcb4SVegard Nossum
11691da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11708d730cfbSDavid Woodhouse# Kernel headers
11718d730cfbSDavid Woodhouse
1172e6883b18SSam Ravnborg#Default location for installed headers
1173e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1174e6883b18SSam Ravnborg
117559b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
117659b2bd05SMasahiro Yamada      cmd_headers_install = \
117759b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
117859b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
117959b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
11806d716275SDavid Woodhouse
11818d730cfbSDavid WoodhousePHONY += headers_install
118259b2bd05SMasahiro Yamadaheaders_install: headers
118359b2bd05SMasahiro Yamada	$(call cmd,headers_install)
11844f193362SPaul Smith
11851da177e4SLinus TorvaldsPHONY += archheaders archscripts
11861da177e4SLinus Torvalds
1187a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
11881da177e4SLinus Torvalds
118959b2bd05SMasahiro YamadaPHONY += headers
119059b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
11919d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
11922fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1193d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1194d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
11951f85712eSMike Frysinger
119668475359SDavid WoodhousePHONY += headers_check
119759b2bd05SMasahiro Yamadaheaders_check: headers
1198d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1199d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1
120068475359SDavid Woodhouse
1201e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
120259b2bd05SMasahiro Yamadaprepare: headers
1203e949f4c2SMasahiro Yamadaendif
12041da177e4SLinus Torvalds
1205257edce6SMasahiro Yamadaifdef CONFIG_HEADERS_CHECK
1206257edce6SMasahiro Yamadaall: headers_check
1207257edce6SMasahiro Yamadaendif
1208257edce6SMasahiro Yamada
1209bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1210bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1211bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1212bdd7714bSMasahiro Yamada
12131da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12145a5da78bSShuah Khan# Kernel selftest
12155a5da78bSShuah Khan
12165a5da78bSShuah KhanPHONY += kselftest
12175a5da78bSShuah Khankselftest:
12182bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
12195a5da78bSShuah Khan
122017eac6c2SShuah Khankselftest-%: FORCE
122117eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1222dcb825a9SWang Long
12233d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
12243d6dee7aSBamvor Jian Zhangkselftest-merge:
12253d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
12266d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
12276d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
12283e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
12293d6dee7aSBamvor Jian Zhang
12305a5da78bSShuah Khan# ---------------------------------------------------------------------------
123137c8a5faSRob Herring# Devicetree files
123237c8a5faSRob Herring
123337c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
123437c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
123537c8a5faSRob Herringendif
123637c8a5faSRob Herring
123737c8a5faSRob Herringifneq ($(dtstree),)
123837c8a5faSRob Herring
1239a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc
124037c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
124137c8a5faSRob Herring
12424f0e3a57SRob HerringPHONY += dtbs dtbs_install dt_binding_check
1243a5139fb3SMasahiro Yamadadtbs dtbs_check: include/config/kernel.release scripts_dtc
124437c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
124537c8a5faSRob Herring
12464f0e3a57SRob Herringdtbs_check: export CHECK_DTBS=1
12474f0e3a57SRob Herringdtbs_check: dt_binding_check
12484f0e3a57SRob Herring
124937c8a5faSRob Herringdtbs_install:
125037c8a5faSRob Herring	$(Q)$(MAKE) $(dtbinst)=$(dtstree)
125137c8a5faSRob Herring
125237c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
125337c8a5faSRob Herringall: dtbs
125437c8a5faSRob Herringendif
125537c8a5faSRob Herring
125637c8a5faSRob Herringendif
125737c8a5faSRob Herring
125837c8a5faSRob HerringPHONY += scripts_dtc
125937c8a5faSRob Herringscripts_dtc: scripts_basic
126037c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
126137c8a5faSRob Herring
12624f0e3a57SRob Herringdt_binding_check: scripts_dtc
12634f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
12644f0e3a57SRob Herring
126537c8a5faSRob Herring# ---------------------------------------------------------------------------
12661da177e4SLinus Torvalds# Modules
12671da177e4SLinus Torvalds
12681da177e4SLinus Torvaldsifdef CONFIG_MODULES
12691da177e4SLinus Torvalds
12701da177e4SLinus Torvalds# By default, build modules as well
12711da177e4SLinus Torvalds
127273d1393eSMichal Marekall: modules
12731da177e4SLinus Torvalds
12741da177e4SLinus Torvalds# Build modules
1275551559e1STejun Heo#
1276551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1277551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1278551559e1STejun Heo# using awk while concatenating to the final file.
12791da177e4SLinus Torvalds
12804f193362SPaul SmithPHONY += modules
128168980b47SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin
1282b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
12833a48a919SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
12841da177e4SLinus Torvalds
1285c99f3918SMasahiro Yamadamodules.order: descend
1286c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1287a6c36632SMichal Marek
1288c99f3918SMasahiro Yamadamodbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs))
1289a6c36632SMichal Marek
129050ef0cdfSMasahiro Yamadamodules.builtin: $(modbuiltin-dirs)
1291c99f3918SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
12921da177e4SLinus Torvalds
129350ef0cdfSMasahiro YamadaPHONY += $(modbuiltin-dirs)
129450ef0cdfSMasahiro Yamada# tristate.conf is not included from this Makefile. Add it as a prerequisite
129550ef0cdfSMasahiro Yamada# here to make it self-healing in case somebody accidentally removes it.
129650ef0cdfSMasahiro Yamada$(modbuiltin-dirs): include/config/tristate.conf
129750ef0cdfSMasahiro Yamada	$(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@)
12981da177e4SLinus Torvalds
12991da177e4SLinus Torvalds# Target to prepare building external modules
13004f193362SPaul SmithPHONY += modules_prepare
1301059bc9fcSMasahiro Yamadamodules_prepare: prepare
13021da177e4SLinus Torvalds
13031da177e4SLinus Torvalds# Target to install modules
13044f193362SPaul SmithPHONY += modules_install
13051da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
13061da177e4SLinus Torvalds
13074f193362SPaul SmithPHONY += _modinst_
13082da30e70SMichal Marek_modinst_:
13091da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
13101da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
13111da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
13128e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
13131da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
13141da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
13157e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
13161da177e4SLinus Torvalds	fi
13171bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
13181bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin
1319898490c0SAlexey Gladkov	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1320b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
13211da177e4SLinus Torvalds
132250a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
13231da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
13241da177e4SLinus Torvalds# boot script depmod is the master version.
13254f193362SPaul SmithPHONY += _modinst_post
13266d128e1eSLinus Torvalds_modinst_post: _modinst_
132750a8ec31SSam Ravnborg	$(call cmd,depmod)
13281da177e4SLinus Torvalds
1329d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1330d890f510SJosh BoyerPHONY += modules_sign
1331d890f510SJosh Boyermodules_sign:
1332d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1333d890f510SJosh Boyerendif
1334d890f510SJosh Boyer
13351da177e4SLinus Torvaldselse # CONFIG_MODULES
13361da177e4SLinus Torvalds
13371da177e4SLinus Torvalds# Modules not configured
13381da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13391da177e4SLinus Torvalds
1340612e47ceSMasahiro YamadaPHONY += modules modules_install
1341612e47ceSMasahiro Yamadamodules modules_install:
13425369f550SMichal Marek	@echo >&2
13435369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
13445369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
13455369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
13465369f550SMichal Marek	@echo >&2
13471da177e4SLinus Torvalds	@exit 1
13481da177e4SLinus Torvalds
13491da177e4SLinus Torvaldsendif # CONFIG_MODULES
13501da177e4SLinus Torvalds
13511da177e4SLinus Torvalds###
13521da177e4SLinus Torvalds# Cleaning is done on three levels.
13531da177e4SLinus Torvalds# make clean     Delete most generated files
13541da177e4SLinus Torvalds#                Leave enough to build external modules
13551da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
13561da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
13571da177e4SLinus Torvalds
13581da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1359b7dca6ddSMasahiro YamadaCLEAN_DIRS  += include/ksym
1360898490c0SAlexey GladkovCLEAN_FILES += modules.builtin.modinfo
13611da177e4SLinus Torvalds
13621da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1363d6fc9fcbSMasahiro YamadaMRPROPER_DIRS  += include/config include/generated          \
136446a63d4bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
136546a63d4bSMasahiro Yamada		  debian/ snap/ tar-install/
1366278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \
136746457133SMasahiro Yamada		  Module.symvers \
1368fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1369fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
137046a63d4bSMasahiro Yamada		  signing_key.x509.signer vmlinux-gdb.py \
137146a63d4bSMasahiro Yamada		  *.spec
13721da177e4SLinus Torvalds
137346457133SMasahiro Yamada# Directories & files removed with 'make distclean'
137446457133SMasahiro YamadaDISTCLEAN_DIRS  +=
137546457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
137646457133SMasahiro Yamada
13771da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
13781da177e4SLinus Torvalds#
13791da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
13801da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
13811da177e4SLinus Torvalds
138276cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
13831da177e4SLinus Torvalds
1384bd1ee804SPawel Mollvmlinuxclean:
1385bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1386fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1387bd1ee804SPawel Moll
1388bd1ee804SPawel Mollclean: archclean vmlinuxclean
13891da177e4SLinus Torvalds
13901da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
13911da177e4SLinus Torvalds#
13921da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
13931da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1394cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
13951da177e4SLinus Torvalds
1396b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
13971da177e4SLinus Torvalds$(mrproper-dirs):
13981da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
13991da177e4SLinus Torvalds
1400b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
14011da177e4SLinus Torvalds	$(call cmd,rmdirs)
14021da177e4SLinus Torvalds	$(call cmd,rmfiles)
14031da177e4SLinus Torvalds
14041da177e4SLinus Torvalds# distclean
14051da177e4SLinus Torvalds#
140646457133SMasahiro Yamadadistclean: rm-dirs  := $(wildcard $(DISTCLEAN_DIRS))
140746457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
140846457133SMasahiro Yamada
14094f193362SPaul SmithPHONY += distclean
14101da177e4SLinus Torvalds
14111da177e4SLinus Torvaldsdistclean: mrproper
141246457133SMasahiro Yamada	$(call cmd,rmdirs)
141346457133SMasahiro Yamada	$(call cmd,rmfiles)
14141da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
14151da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1416f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1417f78271dfSMasahiro Yamada		-o -name 'core' \) \
14181da177e4SLinus Torvalds		-type f -print | xargs rm -f
14191da177e4SLinus Torvalds
14201da177e4SLinus Torvalds
14211da177e4SLinus Torvalds# Packaging of the kernel to various formats
14221da177e4SLinus Torvalds# ---------------------------------------------------------------------------
14231da177e4SLinus Torvalds
1424bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1425000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1426031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1427000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
14281da177e4SLinus Torvalds
14291da177e4SLinus Torvalds# Brief documentation of the typical targets used
14301da177e4SLinus Torvalds# ---------------------------------------------------------------------------
14311da177e4SLinus Torvalds
14325dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1433a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
14345dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
14355dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
14361da177e4SLinus Torvalds
1437fe69b420SMasahiro YamadaPHONY += help
14381da177e4SLinus Torvaldshelp:
14391da177e4SLinus Torvalds	@echo  'Cleaning targets:'
14405ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
14415cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
14425ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
14435cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
14441da177e4SLinus Torvalds	@echo  ''
14451da177e4SLinus Torvalds	@echo  'Configuration targets:'
14461da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
14471da177e4SLinus Torvalds	@echo  ''
14481da177e4SLinus Torvalds	@echo  'Other generic targets:'
14491da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
14501da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
14511da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
14529cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
14531da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
145440ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1455433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1456433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
145762718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
145862718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1459155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1460c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
14611da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
14621da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1463f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
14643f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
14653f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
14663f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
14672fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
146859df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
14692fb9b1bdSSam Ravnborg	 echo  ''
147031b8cc80SRandy Dunlap	@echo  'Static analysers:'
14711da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
14721da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1473aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1474ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1475295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1476179efcb4SVegard Nossum	@echo  '  headers_check   - Sanity check on exported headers'
147774425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
14787f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
147974425eeeSNicolas Palix	@echo  ''
1480eb8305aeSMatthias Maennich	@echo  'Tools:'
1481eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1482eb8305aeSMatthias Maennich	@echo  ''
148331b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
14845a5da78bSShuah Khan	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
14855a5da78bSShuah Khan	@echo  '                    Build, install, and boot kernel before'
14865a5da78bSShuah Khan	@echo  '                    running kselftest on it'
1487dcb825a9SWang Long	@echo  '  kselftest-clean - Remove all generated kselftest files'
1488bbfe63b6SRandy Dunlap	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existing'
14893d6dee7aSBamvor Jian Zhang	@echo  '                    .config.'
14905a5da78bSShuah Khan	@echo  ''
149137c8a5faSRob Herring	@$(if $(dtstree), \
149237c8a5faSRob Herring		echo 'Devicetree:'; \
149337c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
149437c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
14957aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
14967aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
149737c8a5faSRob Herring		echo '')
149837c8a5faSRob Herring
149931b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
150031b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
150131b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
150231b8cc80SRandy Dunlap	@echo  ''
15031da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1504000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
15051da177e4SLinus Torvalds	@echo  ''
15061da177e4SLinus Torvalds	@echo  'Documentation targets:'
1507cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
15081da177e4SLinus Torvalds	@echo  ''
150901dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
15101da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
151101dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
15121da177e4SLinus Torvalds	@echo  ''
15131da177e4SLinus Torvalds	@$(if $(boards), \
15141da177e4SLinus Torvalds		$(foreach b, $(boards), \
15154234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
15161da177e4SLinus Torvalds		echo '')
15175dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
15185dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
15195dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
15205dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
15215dffbe81SSegher Boessenkool		echo '')
15221da177e4SLinus Torvalds
15231da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
152445d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
15251da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1526a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1527a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1528701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1529af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1530e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
153128bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
153228bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
153328bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1534a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
15351da177e4SLinus Torvalds	@echo  ''
15361da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
15371da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
15381da177e4SLinus Torvalds
15391da177e4SLinus Torvalds
15405dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
15415dffbe81SSegher Boessenkool
15425dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
15435dffbe81SSegher Boessenkool
1544fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
15455dffbe81SSegher Boessenkool
15465dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
15475dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
15485dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
15495dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
15505dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
15515dffbe81SSegher Boessenkool		echo '')
15525dffbe81SSegher Boessenkool
15535dffbe81SSegher Boessenkool
15541da177e4SLinus Torvalds# Documentation targets
15551da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1556e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1557e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
155822cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1559bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1560cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
15611da177e4SLinus Torvalds
156267274c08SMasahiro Yamada# Misc
156367274c08SMasahiro Yamada# ---------------------------------------------------------------------------
156467274c08SMasahiro Yamada
156567274c08SMasahiro YamadaPHONY += scripts_gdb
15667a739ce5SMasahiro Yamadascripts_gdb: prepare0
15671e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
15688d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
156967274c08SMasahiro Yamada
157067274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
157167274c08SMasahiro Yamadaall: scripts_gdb
157267274c08SMasahiro Yamadaendif
157367274c08SMasahiro Yamada
15741da177e4SLinus Torvaldselse # KBUILD_EXTMOD
15751da177e4SLinus Torvalds
15761da177e4SLinus Torvalds###
15771da177e4SLinus Torvalds# External module support.
15781da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
15791da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
15801da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
15811da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
15821da177e4SLinus Torvalds# be used.
15831da177e4SLinus Torvalds#
15841da177e4SLinus Torvalds# The following are the only valid targets when building external
15851da177e4SLinus Torvalds# modules.
15861da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
15871da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
15881da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
15891da177e4SLinus Torvalds# make M=dir modules_install
1590070b98bfSSam Ravnborg#                      Install the modules built in the module directory
15911da177e4SLinus Torvalds#                      Assumes install directory is already created
15921da177e4SLinus Torvalds
15931da177e4SLinus Torvalds# We are always building modules
15941da177e4SLinus TorvaldsKBUILD_MODULES := 1
15951da177e4SLinus Torvalds
15964f193362SPaul SmithPHONY += $(objtree)/Module.symvers
15971da177e4SLinus Torvalds$(objtree)/Module.symvers:
15981da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
15991da177e4SLinus Torvalds	echo; \
16001da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
16011da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
16021da177e4SLinus Torvalds	echo )
16031da177e4SLinus Torvalds
1604c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
1605c99f3918SMasahiro YamadaPHONY += modules
1606c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers
1607b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
16081da177e4SLinus Torvalds
16094f193362SPaul SmithPHONY += modules_install
1610a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1611a67dc21aSSam Ravnborg
1612a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
16134f193362SPaul SmithPHONY += _emodinst_
1614a67dc21aSSam Ravnborg_emodinst_:
1615a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1616b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
16171da177e4SLinus Torvalds
16184f193362SPaul SmithPHONY += _emodinst_post
1619a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1620a67dc21aSSam Ravnborg	$(call cmd,depmod)
1621a67dc21aSSam Ravnborg
162276cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
162388d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
16241da177e4SLinus Torvalds
1625d4945049SMasahiro YamadaPHONY += /
1626d4945049SMasahiro Yamada/:
1627d4945049SMasahiro Yamada	@echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1628d4945049SMasahiro Yamada
1629fe69b420SMasahiro YamadaPHONY += help
16301da177e4SLinus Torvaldshelp:
16311da177e4SLinus Torvalds	@echo  '  Building external modules.'
16321da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
16331da177e4SLinus Torvalds	@echo  ''
16341da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
16351da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
16361da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
16371da177e4SLinus Torvalds	@echo  ''
163806300b21SSam Ravnborg
1639059bc9fcSMasahiro YamadaPHONY += prepare
16401da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
16411da177e4SLinus Torvalds
1642c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1643c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
1644c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
1645c99f3918SMasahiro Yamada# make menuconfig etc.
1646c99f3918SMasahiro Yamada# Error messages still appears in the original language
1647c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
1648c99f3918SMasahiro Yamadadescend: $(build-dirs)
1649c99f3918SMasahiro Yamada$(build-dirs): prepare
1650394053f4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ single-build=$(single-build) need-builtin=1 need-modorder=1
1651c99f3918SMasahiro Yamada
165276cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
165376cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
165476cd306dSMasahiro Yamada$(clean-dirs):
165576cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
165676cd306dSMasahiro Yamada
165788d7be03SMichal Marekclean: $(clean-dirs)
165888d7be03SMichal Marek	$(call cmd,rmdirs)
165988d7be03SMichal Marek	$(call cmd,rmfiles)
166043f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1661ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
16624f0e3a57SRob Herring		-o -name '*.ko.*' \
16634f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1664ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
16651d082773SMatthias Maennich		-o -name '*.su' -o -name '*.mod' -o -name '*.ns_deps' \
166688d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
16679a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
16684fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
166988d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
167088d7be03SMichal Marek		-o -name modules.builtin -o -name '.tmp_*.o.*' \
16716b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1672433db3e2SVinícius Tinti		-o -name '*.ll' \
167388d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
167488d7be03SMichal Marek
16751da177e4SLinus Torvalds# Generate tags for editors
16761da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1677a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1678858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
16791da177e4SLinus Torvalds
1680f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
16811da177e4SLinus Torvalds	$(call cmd,tags)
16821da177e4SLinus Torvalds
1683eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
1684eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
1685eb8305aeSMatthias Maennich
1686eb8305aeSMatthias MaennichPHONY += nsdeps
1687*bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
1688eb8305aeSMatthias Maennichnsdeps: modules
1689*bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1690eb8305aeSMatthias Maennich
16911da177e4SLinus Torvalds# Scripts to check various things for consistency
16921da177e4SLinus Torvalds# ---------------------------------------------------------------------------
16931da177e4SLinus Torvalds
1694279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1695279f3dd3SPeter Foley
16961da177e4SLinus Torvaldsincludecheck:
1697436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
16981da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
169980007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
17001da177e4SLinus Torvalds
17011da177e4SLinus Torvaldsversioncheck:
17022ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
17031da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
170480007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
17051da177e4SLinus Torvalds
170674425eeeSNicolas Palixcoccicheck:
1707858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
170874425eeeSNicolas Palix
17091da177e4SLinus Torvaldsnamespacecheck:
17101da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
17111da177e4SLinus Torvalds
1712295ac051SAdrian Bunkexport_report:
1713295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1714295ac051SAdrian Bunk
1715c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1716e3ccf6e3SJeff Dike
1717011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1718011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1719011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1720011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1721011e3a9aSJeff Dikeifeq ($(ARCH), um)
1722011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1723011e3a9aSJeff Dikeelse
1724011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1725011e3a9aSJeff Dikeendif
17261da177e4SLinus Torvaldscheckstack:
17271da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
172875dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
17291da177e4SLinus Torvalds
17307b8ea53dSAmerigo Wangkernelrelease:
17317b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
173201ab1788SAmerigo Wang
1733cb58455cSSam Ravnborgkernelversion:
17342244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
17351da177e4SLinus Torvalds
1736c398ff00SMike Marciniszynimage_name:
1737c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1738c398ff00SMike Marciniszyn
1739ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1740f47a23ceSMasahiro Yamada
1741f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1742f47a23ceSMasahiro Yamadatools_silent=s
1743f47a23ceSMasahiro Yamadaendif
1744f47a23ceSMasahiro Yamada
1745ea01fa9fSBorislav Petkovtools/: FORCE
1746bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
174775dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1748ea01fa9fSBorislav Petkov
1749ea01fa9fSBorislav Petkovtools/%: FORCE
1750bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
175175dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1752ea01fa9fSBorislav Petkov
175306300b21SSam Ravnborg# Single targets
175406300b21SSam Ravnborg# ---------------------------------------------------------------------------
1755394053f4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1756bc2546a6SSam Ravnborg#
1757394053f4SMasahiro Yamada#   make foo/bar/baz.s
1758394053f4SMasahiro Yamada#
1759394053f4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1760394053f4SMasahiro Yamada#
1761394053f4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1762394053f4SMasahiro Yamada#
1763394053f4SMasahiro Yamada#   make foo/bar/baz/
176406300b21SSam Ravnborg
1765394053f4SMasahiro Yamadaifdef single-build
176606300b21SSam Ravnborg
1767394053f4SMasahiro Yamada# .ko is special because modpost is needed
176835e046a2SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
176935e046a2SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1770394053f4SMasahiro Yamada
1771394053f4SMasahiro Yamada$(single-ko): single_modpost
1772394053f4SMasahiro Yamada	@:
1773394053f4SMasahiro Yamada$(single-no-ko): descend
1774394053f4SMasahiro Yamada	@:
1775394053f4SMasahiro Yamada
177647801c97SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1777394053f4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
177847801c97SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1779394053f4SMasahiro YamadaMODORDER := .modules.tmp
178047801c97SMasahiro Yamadaendif
1781394053f4SMasahiro Yamada
1782394053f4SMasahiro YamadaPHONY += single_modpost
1783394053f4SMasahiro Yamadasingle_modpost: $(single-no-ko)
1784394053f4SMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
178547801c97SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1786bc2546a6SSam Ravnborg
1787394053f4SMasahiro YamadaKBUILD_MODULES := 1
17886d3c94e4SMasahiro Yamada
1789394053f4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1790394053f4SMasahiro Yamada
1791394053f4SMasahiro Yamadasingle-build = $(if $(filter-out $@/, $(single-no-ko)),1)
1792394053f4SMasahiro Yamada
1793394053f4SMasahiro Yamadaendif
179406300b21SSam Ravnborg
17951da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
17961da177e4SLinus Torvalds# ===========================================================================
17971da177e4SLinus Torvalds
17981da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
17991da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
18001da177e4SLinus Torvalds
18011da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
18021da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
18031da177e4SLinus Torvalds
1804bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
180550a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1806569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
18075a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
180850a8ec31SSam Ravnborg
1809392885eeSMasahiro Yamada# read saved command lines for existing targets
1810392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
18111da177e4SLinus Torvalds
1812b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
18131da177e4SLinus Torvalds
18142042b548SMasahiro Yamadaendif # config-targets
18152042b548SMasahiro Yamadaendif # mixed-build
1816688931a5SMasahiro Yamadaendif # need-sub-make
18171da177e4SLinus Torvalds
18184f193362SPaul SmithPHONY += FORCE
18191da177e4SLinus TorvaldsFORCE:
18204f193362SPaul Smith
1821bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1822fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
18234f193362SPaul Smith.PHONY: $(PHONY)
1824