xref: /openbmc/linux/Makefile (revision 75dd4747)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2bfeffd15SLinus TorvaldsVERSION = 5
3a188339cSLinus TorvaldsPATCHLEVEL = 2
455922c9dSLinus TorvaldsSUBLEVEL = 0
5d1fdb6d8SLinus TorvaldsEXTRAVERSION = -rc4
6cd6c84d8SLinus TorvaldsNAME = Golden Lions
71da177e4SLinus Torvalds
81da177e4SLinus Torvalds# *DOCUMENTATION*
91da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
101da177e4SLinus Torvalds# More info can be located in ./README
111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
131da177e4SLinus Torvalds
14ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
15ba634eceSMasahiro YamadaPHONY := _all
16ba634eceSMasahiro Yamada_all:
17ba634eceSMasahiro Yamada
181da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
191da177e4SLinus Torvalds# to get the ordering right.
201da177e4SLinus Torvalds#
211da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
221da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
231da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
24f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
251da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
261da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
271da177e4SLinus Torvalds# is now up to date.
281da177e4SLinus Torvalds#
291da177e4SLinus Torvalds# The only cases where we need to modify files which have global
301da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
311da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
321da177e4SLinus Torvalds# prepare rule.
331da177e4SLinus Torvalds
34221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
353812b8c5SMasahiro Yamada
363812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
373812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
383812b8c5SMasahiro YamadaMAKEFLAGS += -rR
393812b8c5SMasahiro Yamada
403812b8c5SMasahiro Yamada# Avoid funny character set dependencies
413812b8c5SMasahiro Yamadaunexport LC_ALL
423812b8c5SMasahiro YamadaLC_COLLATE=C
433812b8c5SMasahiro YamadaLC_NUMERIC=C
443812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
453812b8c5SMasahiro Yamada
463812b8c5SMasahiro Yamada# Avoid interference with shell env settings
473812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
483812b8c5SMasahiro Yamada
49066b7ed9SMichal Marek# Beautify output
50066b7ed9SMichal Marek# ---------------------------------------------------------------------------
51066b7ed9SMichal Marek#
52066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
53066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
54066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
55066b7ed9SMichal Marek#
56066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
57066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
58066b7ed9SMichal Marek#
59066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
60066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
61066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
62066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
63066b7ed9SMichal Marek#
64066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
65066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
66066b7ed9SMichal Marek#
67066b7ed9SMichal Marek#	$(Q)ln $@ :<
68066b7ed9SMichal Marek#
69066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
70066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
71066b7ed9SMichal Marek#
721da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
731da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
741da177e4SLinus Torvalds
751da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
761da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
771da177e4SLinus Torvaldsendif
781da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
791da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
801da177e4SLinus Torvaldsendif
811da177e4SLinus Torvalds
82066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
83066b7ed9SMichal Marek  quiet =
84066b7ed9SMichal Marek  Q =
85066b7ed9SMichal Marekelse
86066b7ed9SMichal Marek  quiet=quiet_
87066b7ed9SMichal Marek  Q = @
88066b7ed9SMichal Marekendif
89066b7ed9SMichal Marek
90066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
91066b7ed9SMichal Marek# commands
92066b7ed9SMichal Marek
936f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
94066b7ed9SMichal Marek  quiet=silent_
95066b7ed9SMichal Marekendif
96066b7ed9SMichal Marek
97066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
98066b7ed9SMichal Marek
9925b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
10025b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
10125b146c5SMasahiro Yamada#
10225b146c5SMasahiro Yamada# For example, you can do this:
10325b146c5SMasahiro Yamada#
10425b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
10525b146c5SMasahiro Yamada#
10625b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
10725b146c5SMasahiro Yamada# two syntaxes to specify it.
10825b146c5SMasahiro Yamada#
1091da177e4SLinus Torvalds# 1) O=
1101da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1111da177e4SLinus Torvalds#
1121da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
11325b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
11425b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1151da177e4SLinus Torvalds#
1161da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1171da177e4SLinus Torvalds# variable.
1181da177e4SLinus Torvalds
11925b146c5SMasahiro Yamada# Do we want to change the working directory?
1201da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1211da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1221da177e4SLinus Torvaldsendif
1231da177e4SLinus Torvalds
12425b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
12525b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
12625b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
12725b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
12825b146c5SMasahiro Yamada$(if $(abs_objtree),, \
12925b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
13025b146c5SMasahiro Yamada
13125b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
13225b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
13325b146c5SMasahiro Yamadaelse
13425b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
13525b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
13625b146c5SMasahiro Yamada
13725b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
13825b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
13925b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
14025b146c5SMasahiro Yamadaelse
14125b146c5SMasahiro Yamadaneed-sub-make := 1
14251193b76SRobert Jarzmikendif
14351193b76SRobert Jarzmik
14425b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
1451da177e4SLinus Torvalds
14625b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
14725b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
14825b146c5SMasahiro Yamadaendif
14925b146c5SMasahiro Yamada
15025b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
15180463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
15280463f1bSMasahiro Yamada#
15380463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed
15425b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make.
15525b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
156688931a5SMasahiro Yamadaneed-sub-make := 1
15725b146c5SMasahiro Yamadaendif
1583812b8c5SMasahiro Yamada
159688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
160688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
161688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
162688931a5SMasahiro Yamadaneed-sub-make := 1
163688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
164688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ;
165688931a5SMasahiro Yamadaendif
166688931a5SMasahiro Yamada
16725b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
168221cc2d2SMasahiro Yamadaexport sub_make_done := 1
169221cc2d2SMasahiro Yamada
170688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
171688931a5SMasahiro Yamada
1720b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
1730b35786dSMilton Miller
1740209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
17516f89098SCharles Keepax	@:
1760b35786dSMilton Miller
177c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
1782e8d696bSMasahiro Yamadasub-make:
17925b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
1801da177e4SLinus Torvalds
181688931a5SMasahiro Yamadaendif # need-sub-make
182221cc2d2SMasahiro Yamadaendif # sub_make_done
183688931a5SMasahiro Yamada
1841da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
185688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
1861da177e4SLinus Torvalds
1877ff52571SMasahiro Yamada# Do not print "Entering directory ...",
1887ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
1897ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
1907ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
1917ff52571SMasahiro Yamada
192aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
193aa55c8e2SMasahiro Yamada# C compilation.
194aa55c8e2SMasahiro Yamada#
195aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
196aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
197aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
198aa55c8e2SMasahiro Yamada#
199036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
200036db11cSCao jin# including where to get the "sparse" utility.
201aa55c8e2SMasahiro Yamada
202aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
203aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
204aa55c8e2SMasahiro Yamadaendif
205aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
206aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
207aa55c8e2SMasahiro Yamadaendif
208aa55c8e2SMasahiro Yamada
209aa55c8e2SMasahiro Yamada# Use make M=dir to specify directory of external module to build
210aa55c8e2SMasahiro Yamada# Old syntax make ... SUBDIRS=$PWD is still supported
211aa55c8e2SMasahiro Yamada# Setting the environment variable KBUILD_EXTMOD take precedence
212aa55c8e2SMasahiro Yamadaifdef SUBDIRS
2130126be38SMasahiro Yamada  $(warning ================= WARNING ================)
2140126be38SMasahiro Yamada  $(warning 'SUBDIRS' will be removed after Linux 5.3)
2154e8fc3f5SMasahiro Yamada  $(warning )
2164e8fc3f5SMasahiro Yamada  $(warning If you are building an individual subdirectory)
2174e8fc3f5SMasahiro Yamada  $(warning in the kernel tree, you can do like this:)
2184e8fc3f5SMasahiro Yamada  $(warning $$ make path/to/dir/you/want/to/build/)
2194e8fc3f5SMasahiro Yamada  $(warning (Do not forget the trailing slash))
2204e8fc3f5SMasahiro Yamada  $(warning )
2214e8fc3f5SMasahiro Yamada  $(warning If you are building an external module,)
2220126be38SMasahiro Yamada  $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead)
2230126be38SMasahiro Yamada  $(warning ==========================================)
224aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD ?= $(SUBDIRS)
225aa55c8e2SMasahiro Yamadaendif
226aa55c8e2SMasahiro Yamada
227aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
228aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
229aa55c8e2SMasahiro Yamadaendif
230aa55c8e2SMasahiro Yamada
23125b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
2329da0763bSMichal Marek        # building in the source tree
2339da0763bSMichal Marek        srctree := .
2349da0763bSMichal Marekelse
23525b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
2369da0763bSMichal Marek                # building in a subdirectory of the source tree
2379da0763bSMichal Marek                srctree := ..
2389da0763bSMichal Marek        else
23925b146c5SMasahiro Yamada                srctree := $(abs_srctree)
2409da0763bSMichal Marek        endif
24125b146c5SMasahiro Yamada
24225b146c5SMasahiro Yamada	# TODO:
24325b146c5SMasahiro Yamada	# KBUILD_SRC is only used to distinguish in-tree/out-of-tree build.
24425b146c5SMasahiro Yamada	# Replace it with $(srctree) or something.
24525b146c5SMasahiro Yamada	KBUILD_SRC := $(abs_srctree)
2469da0763bSMichal Marekendif
2472c1f4f12SMasahiro Yamada
2482c1f4f12SMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
2492c1f4f12SMasahiro Yamada
2507e1c0477SMichal Marekobjtree		:= .
2516b12de69SMasahiro YamadaVPATH		:= $(srctree)
2521da177e4SLinus Torvalds
25311294235SAmerigo Wangexport srctree objtree VPATH
2541da177e4SLinus Torvalds
2552c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2562c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2572c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2582c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2592c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2602c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2612c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2622c1f4f12SMasahiro Yamada
2632c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2642c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
2652c1f4f12SMasahiro Yamada
26622340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
26722340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2682c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
26959b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
27063e31a67SMasahiro Yamada			 %asm-generic kernelversion %src-pkg
271a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \
272a29d4d8cSMasahiro Yamada			   kernelrelease
2732c1f4f12SMasahiro Yamada
2742c1f4f12SMasahiro Yamadaconfig-targets  := 0
2752c1f4f12SMasahiro Yamadamixed-targets   := 0
2762c1f4f12SMasahiro Yamadadot-config      := 1
277d7942413SMasahiro Yamadamay-sync-config := 1
2782c1f4f12SMasahiro Yamada
2792c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2802c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2812c1f4f12SMasahiro Yamada		dot-config := 0
2822c1f4f12SMasahiro Yamada	endif
2832c1f4f12SMasahiro Yamadaendif
2842c1f4f12SMasahiro Yamada
285d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
286d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
287d7942413SMasahiro Yamada		may-sync-config := 0
288d7942413SMasahiro Yamada	endif
289d7942413SMasahiro Yamadaendif
290d7942413SMasahiro Yamada
291d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
292d7942413SMasahiro Yamada	may-sync-config := 0
293d7942413SMasahiro Yamadaendif
294d7942413SMasahiro Yamada
2952c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
2962c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
2972c1f4f12SMasahiro Yamada                config-targets := 1
2982c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
2992c1f4f12SMasahiro Yamada                        mixed-targets := 1
3002c1f4f12SMasahiro Yamada                endif
3012c1f4f12SMasahiro Yamada        endif
3022c1f4f12SMasahiro Yamadaendif
30322340a06SMasahiro Yamada
30422340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
30522340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
30622340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
30722340a06SMasahiro Yamada                mixed-targets := 1
30822340a06SMasahiro Yamada        endif
30922340a06SMasahiro Yamadaendif
31022340a06SMasahiro Yamada
3112c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3122c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3132c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3142c1f4f12SMasahiro Yamada	        mixed-targets := 1
3152c1f4f12SMasahiro Yamada        endif
3162c1f4f12SMasahiro Yamadaendif
3172c1f4f12SMasahiro Yamada
3182c1f4f12SMasahiro Yamadaifeq ($(mixed-targets),1)
3192c1f4f12SMasahiro Yamada# ===========================================================================
3202c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3212c1f4f12SMasahiro Yamada# Handle them one by one.
3222c1f4f12SMasahiro Yamada
3232c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3242c1f4f12SMasahiro Yamada
3252c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
3262c1f4f12SMasahiro Yamada	@:
3272c1f4f12SMasahiro Yamada
3282c1f4f12SMasahiro Yamada__build_one_by_one:
3292c1f4f12SMasahiro Yamada	$(Q)set -e; \
3302c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3312c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3322c1f4f12SMasahiro Yamada	done
3332c1f4f12SMasahiro Yamada
3342c1f4f12SMasahiro Yamadaelse
3352c1f4f12SMasahiro Yamada
3362c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
3372c1f4f12SMasahiro Yamada
3382c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3392c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3402c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3412c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3422c1f4f12SMasahiro Yamada
343b2d35fa5SAnders Roxellinclude scripts/subarch.include
3441da177e4SLinus Torvalds
3451da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3461da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3471da177e4SLinus Torvalds#
3481da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3491da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3501da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3511da177e4SLinus Torvalds# make ARCH=ia64
3521da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3531da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3541da177e4SLinus Torvalds
3551da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3561da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3571da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3581da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3591da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3601da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3611da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3621da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3632331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3641da177e4SLinus Torvalds
3651da177e4SLinus Torvalds# Architecture as present in compile.h
3661da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3676752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3681da177e4SLinus Torvalds
369d746d647SSam Ravnborg# Additional ARCH settings for x86
370d746d647SSam Ravnborgifeq ($(ARCH),i386)
371d746d647SSam Ravnborg        SRCARCH := x86
372d746d647SSam Ravnborgendif
373d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
374d746d647SSam Ravnborg        SRCARCH := x86
375d746d647SSam Ravnborgendif
37674b469f2SSam Ravnborg
3775e538790SSam Ravnborg# Additional ARCH settings for sparc
378e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
379e69f58c0SNamhyung Kim       SRCARCH := sparc
380e69f58c0SNamhyung Kimendif
381a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
3825e538790SSam Ravnborg       SRCARCH := sparc
383a439fe51SSam Ravnborgendif
3842fb9b1bdSSam Ravnborg
3853cc000b5SPaul Mundt# Additional ARCH settings for sh
3863cc000b5SPaul Mundtifeq ($(ARCH),sh64)
3873cc000b5SPaul Mundt       SRCARCH := sh
3883cc000b5SPaul Mundtendif
3893cc000b5SPaul Mundt
39014cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
39141263fc6SBen Gardinerexport KCONFIG_CONFIG
39214cdd3c4SRoman Zippel
3931da177e4SLinus Torvalds# SHELL used by kbuild
3941da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
3951da177e4SLinus Torvalds	  else if [ -x /bin/bash ]; then echo /bin/bash; \
3961da177e4SLinus Torvalds	  else echo sh; fi ; fi)
3971da177e4SLinus Torvalds
3986d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
3996d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4006d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
401d7f14c66SUwe Kleine-König
4021da177e4SLinus TorvaldsHOSTCC       = gcc
4031da177e4SLinus TorvaldsHOSTCXX      = g++
40496f14fe7SLaura AbbottKBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
405f92d19e0SLaura Abbott		-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
406f92d19e0SLaura Abbott		$(HOSTCFLAGS)
407f92d19e0SLaura AbbottKBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
408f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
409f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4101da177e4SLinus Torvalds
4111da177e4SLinus Torvalds# Make variables (CC, etc...)
4121da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
4131da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
4141da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
4151da177e4SLinus TorvaldsCPP		= $(CC) -E
4161da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4171da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4181da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
4191da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
4201da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
421e83b9f55SAndrii NakryikoPAHOLE		= pahole
42273a4f6dbSMasahiro YamadaLEX		= flex
42373a4f6dbSMasahiro YamadaYACC		= bison
4241da177e4SLinus TorvaldsAWK		= awk
425caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
4261da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
4271da177e4SLinus TorvaldsPERL		= perl
428011bf125SMasahiro YamadaPYTHON		= python
429e9781b52SMasahiro YamadaPYTHON2		= python2
430e9781b52SMasahiro YamadaPYTHON3		= python3
4311da177e4SLinus TorvaldsCHECK		= sparse
4321da177e4SLinus Torvalds
43380a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
4346c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
4350c22be07SDouglas AndersonNOSTDINC_FLAGS :=
4366588169dSSam RavnborgCFLAGS_MODULE   =
4376588169dSSam RavnborgAFLAGS_MODULE   =
4386588169dSSam RavnborgLDFLAGS_MODULE  =
4391da177e4SLinus TorvaldsCFLAGS_KERNEL	=
4401da177e4SLinus TorvaldsAFLAGS_KERNEL	=
441b36fad65SMichal MarekLDFLAGS_vmlinux =
4421da177e4SLinus Torvalds
443abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
444abbf1590SDavid HowellsUSERINCLUDE    := \
4459d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4469d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
447abbf1590SDavid Howells		-I$(srctree)/include/uapi \
4483308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
449abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
450abbf1590SDavid Howells
4511da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
4521da177e4SLinus Torvalds# Needed to be compatible with the O= option
453abbf1590SDavid HowellsLINUXINCLUDE    := \
4549d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
4559d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
456a9a49c2aSMasahiro Yamada		$(if $(filter .,$(srctree)),,-I$(srctree)/include) \
457f8224f7fSMasahiro Yamada		-I$(objtree)/include \
458f8224f7fSMasahiro Yamada		$(USERINCLUDE)
4591da177e4SLinus Torvalds
46042a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
461eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
46242a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
463b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
46451b97e35SKirill A. Shutemov		   -Wno-format-security \
465433dc2ebSMasahiro Yamada		   -std=gnu89
466433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
46780c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
46880c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
4696588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
4706588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
4716588169dSSam RavnborgKBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
472d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
473433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
4741da177e4SLinus Torvalds
47596f14fe7SLaura Abbottexport ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
476e83b9f55SAndrii Nakryikoexport CPP AR NM STRIP OBJCOPY OBJDUMP PAHOLE KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
47788110713SMasahiro Yamadaexport MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
47810844aebSLaura Abbottexport HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
4791da177e4SLinus Torvalds
480d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
4810e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
4820e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
483222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
4846588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
48580c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
48640df759eSMichal Marekexport KBUILD_ARFLAGS
4871da177e4SLinus Torvalds
4881da177e4SLinus Torvalds# When compiling out-of-tree modules, put MODVERDIR in the module
4891da177e4SLinus Torvalds# tree rather than in the kernel tree. The kernel tree might
4901da177e4SLinus Torvalds# even be read-only.
4911da177e4SLinus Torvaldsexport MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
4921da177e4SLinus Torvalds
4931da177e4SLinus Torvalds# Files to ignore in find ... statements
4941da177e4SLinus Torvalds
495ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
496ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
497ae63b2d7SPrarit Bhargava			  -prune -o
498450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
499450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
5001da177e4SLinus Torvalds
5011da177e4SLinus Torvalds# ===========================================================================
5021da177e4SLinus Torvalds# Rules shared between *config targets and build targets
5031da177e4SLinus Torvalds
504312a3d09SCao jin# Basic helpers built in scripts/basic/
5054f193362SPaul SmithPHONY += scripts_basic
5061da177e4SLinus Torvaldsscripts_basic:
5071da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
508638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
5091da177e4SLinus Torvalds
5104f193362SPaul SmithPHONY += outputmakefile
511fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
512fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
513fd5f0cd6SJan Beulich# output directory.
5143a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
5153a51ff34SVladimir Kondratiev# ignore whole output directory
5161da177e4SLinus Torvaldsoutputmakefile:
517a9a49c2aSMasahiro Yamadaifneq ($(srctree),.)
51892979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
5194fd61277SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
520156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
521156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
522fd5f0cd6SJan Beulichendif
5231da177e4SLinus Torvalds
52499516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
525ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
526238bcbc4SMasahiro YamadaCLANG_FLAGS	:= --target=$(notdir $(CROSS_COMPILE:%-=%))
527ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
528238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)
529ef8c4ed9SStefan AgnerGCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
530ae6b289aSChris Friesendif
531ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
532238bcbc4SMasahiro YamadaCLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
533ae6b289aSChris Friesendif
534876a0600SNathan Chancellorifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),)
535238bcbc4SMasahiro YamadaCLANG_FLAGS	+= -no-integrated-as
536876a0600SNathan Chancellorendif
537589834b3SNathan ChancellorCLANG_FLAGS	+= -Werror=unknown-warning-option
538238bcbc4SMasahiro YamadaKBUILD_CFLAGS	+= $(CLANG_FLAGS)
539238bcbc4SMasahiro YamadaKBUILD_AFLAGS	+= $(CLANG_FLAGS)
5403bd98050SJoel Stanleyexport CLANG_FLAGS
541ae6b289aSChris Friesendif
542ae6b289aSChris Fries
543315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
544315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
545315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
546315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade.
547902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
548315bab4eSMasahiro Yamada
5491da177e4SLinus Torvaldsifeq ($(config-targets),1)
5501da177e4SLinus Torvalds# ===========================================================================
5511da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
5521da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
5531da177e4SLinus Torvalds
5541da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
5551da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
5561da177e4SLinus Torvalds# used for 'make defconfig'
557a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
558315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
5591da177e4SLinus Torvalds
56031110ebbSSam Ravnborgconfig: scripts_basic outputmakefile FORCE
56131110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
56231110ebbSSam Ravnborg
56331110ebbSSam Ravnborg%config: scripts_basic outputmakefile FORCE
5641da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
5651da177e4SLinus Torvalds
5661da177e4SLinus Torvaldselse
5671da177e4SLinus Torvalds# ===========================================================================
5681da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
5691da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
5701da177e4SLinus Torvalds
5712c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
5722c1f4f12SMasahiro Yamada# but instead _all depend on modules
5732c1f4f12SMasahiro YamadaPHONY += all
5742c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
5752c1f4f12SMasahiro Yamada_all: all
5762c1f4f12SMasahiro Yamadaelse
5772c1f4f12SMasahiro Yamada_all: modules
5782c1f4f12SMasahiro Yamadaendif
5792c1f4f12SMasahiro Yamada
5802c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
5812c1f4f12SMasahiro Yamada# Normally, just do built-in.
5822c1f4f12SMasahiro Yamada
5832c1f4f12SMasahiro YamadaKBUILD_MODULES :=
5842c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
5852c1f4f12SMasahiro Yamada
5862c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
5872c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider
5882c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to
5892c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them.
5902c1f4f12SMasahiro Yamada
5912c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
5922c1f4f12SMasahiro Yamada  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
5932c1f4f12SMasahiro Yamadaendif
5942c1f4f12SMasahiro Yamada
5952c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
5962c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
5972c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
5982c1f4f12SMasahiro Yamada
5992c1f4f12SMasahiro Yamadaifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
6002c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6012c1f4f12SMasahiro Yamadaendif
6022c1f4f12SMasahiro Yamada
6032c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
6042c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
6052c1f4f12SMasahiro Yamadaendif
6062c1f4f12SMasahiro Yamada
6072c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
6082c1f4f12SMasahiro Yamada
609d93a18f2SMasahiro Yamadaifeq ($(dot-config),1)
610d93a18f2SMasahiro Yamadainclude include/config/auto.conf
611d93a18f2SMasahiro Yamadaendif
612d93a18f2SMasahiro Yamada
6131da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6141da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
6151da177e4SLinus Torvaldsinit-y		:= init/
616f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
617d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
61843c78d88SMasahiro Yamadadrivers-$(CONFIG_KERNEL_HEADER_TEST) += include/
6191da177e4SLinus Torvaldsnet-y		:= net/
6201da177e4SLinus Torvaldslibs-y		:= lib/
6211da177e4SLinus Torvaldscore-y		:= usr/
62237d9fe47SFeng Wuvirt-y		:= virt/
6231da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
6241da177e4SLinus Torvalds
625315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
626315bab4eSMasahiro Yamada# command line.
627315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
628315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
629315bab4eSMasahiro Yamadaall: vmlinux
630315bab4eSMasahiro Yamada
631315bab4eSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
632315bab4eSMasahiro Yamada	$(call cc-option,-fno-tree-loop-im) \
633315bab4eSMasahiro Yamada	$(call cc-disable-warning,maybe-uninitialized,)
6345aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
635315bab4eSMasahiro Yamada
636b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
637b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
638b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
639b1f4ff74SPaulo Zanoniendif
640b1f4ff74SPaulo Zanoni
641669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
642669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
643669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
644669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
645669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
646669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
647669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS
648669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS
649669e06b1SMasahiro Yamada
650315bab4eSMasahiro Yamada# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
651315bab4eSMasahiro Yamada# values of the respective KBUILD_* variables
652315bab4eSMasahiro YamadaARCH_CPPFLAGS :=
653315bab4eSMasahiro YamadaARCH_AFLAGS :=
654315bab4eSMasahiro YamadaARCH_CFLAGS :=
655315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
656315bab4eSMasahiro Yamada
657315bab4eSMasahiro Yamadaifeq ($(dot-config),1)
658d7942413SMasahiro Yamadaifeq ($(may-sync-config),1)
659315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
660315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
661315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
662d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
6631da177e4SLinus Torvalds
66405850719SMasahiro Yamada$(KCONFIG_CONFIG):
66505850719SMasahiro Yamada	@echo >&2 '***'
66605850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
66705850719SMasahiro Yamada	@echo >&2 '***'
66805850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
66905850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
67005850719SMasahiro Yamada	@echo >&2 '***'
67105850719SMasahiro Yamada	@/bin/false
6721da177e4SLinus Torvalds
67361277981SUlf Magnusson# The actual configuration files used during the build are stored in
67461277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
67561277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
6769390dff6SMasahiro Yamada#
6779390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
6789390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
6799390dff6SMasahiro Yamada%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
680911a91c3SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
6811da177e4SLinus Torvaldselse
682d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
683d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
684d7942413SMasahiro Yamada# Use auto.conf to trigger the test
6859ee4e336SSam RavnborgPHONY += include/config/auto.conf
6869ee4e336SSam Ravnborg
6879ee4e336SSam Ravnborginclude/config/auto.conf:
688264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
6895369f550SMichal Marek	echo >&2;							\
6905369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
6915369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
6925369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
6935369f550SMichal Marek	echo >&2 ;							\
6949ee4e336SSam Ravnborg	/bin/false)
6959ee4e336SSam Ravnborg
696d7942413SMasahiro Yamadaendif # may-sync-config
6979ee4e336SSam Ravnborgendif # $(dot-config)
6981da177e4SLinus Torvalds
699a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
700ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
701bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
702bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
7036f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
704a1c48bb1SGeert Uytterhoeven
7051da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
706a75bb4ebSMatthias KaehlckeKBUILD_CFLAGS	+= -Os
707815eb71eSArnd Bergmannelse
708a0f97e06SSam RavnborgKBUILD_CFLAGS   += -O2
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
756cfe17c9bSMasahiro Yamadaendif
757cfe17c9bSMasahiro Yamada
7580a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
7591da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
760a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
7611da177e4SLinus Torvaldselse
7627e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
7637e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
7647e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
7657e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
7667e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
7677e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
768a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
7691da177e4SLinus Torvaldsendif
7707e9501fdSRabin Vincentendif
7711da177e4SLinus Torvalds
772709a972eSKees Cook# Initialize all stack variables with a pattern, if desired.
773709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL
774709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
775709a972eSKees Cookendif
776709a972eSKees Cook
7771e88e415SMasahiro YamadaDEBUG_CFLAGS	:= $(call cc-option, -fno-var-tracking-assignments)
7782062afb4SLinus Torvalds
7791da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
780866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
7819d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gsplit-dwarf
782866ced95SAndi Kleenelse
7831e88e415SMasahiro YamadaDEBUG_CFLAGS	+= -g
784866ced95SAndi Kleenendif
7852288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
7861da177e4SLinus Torvaldsendif
787bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
7889d937444SMasahiro YamadaDEBUG_CFLAGS	+= -gdwarf-4
789bfaf2dd3SAndi Kleenendif
7901da177e4SLinus Torvalds
791d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
7921e88e415SMasahiro YamadaDEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
793e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
794d6f4ceb7SAndi Kleenendif
795d6f4ceb7SAndi Kleen
7961e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS)
7971e88e415SMasahiro Yamadaexport DEBUG_CFLAGS
7981e88e415SMasahiro Yamada
799606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
80007d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD
80107d04081SVasily Gorbik  # gcc 5 supports generating the mcount tables directly
80207d04081SVasily Gorbik  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
80307d04081SVasily Gorbik    CC_FLAGS_FTRACE	+= -mrecord-mcount
80407d04081SVasily Gorbik    export CC_USING_RECORD_MCOUNT := 1
805a2546faeSSteven Rostedt  endif
8062f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
8072f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
8082f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
8092f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
8102f4df001SVasily Gorbik    endif
8112f4df001SVasily Gorbik  endif
81207d04081SVasily Gorbikendif
813a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
814f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
815f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
816f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
817a2546faeSSteven Rostedt  endif
818f28bc3c3SVasily Gorbikendif
819f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
820f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
821f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
82272441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
823cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
82472441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
82572441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
82672441cb1SSteven Rostedt	endif
82772441cb1SSteven Rostedtendif
82816444a8aSArnaldo Carvalho de Meloendif
82916444a8aSArnaldo Carvalho de Melo
83091341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
83191341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
83291341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
83391341d4bSSam Ravnborgendif
83491341d4bSSam Ravnborg
83590ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
836e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
837e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
83890ad4052SMasahiro Yamadaendif
83990ad4052SMasahiro Yamada
84043bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH
84143bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
84243bd3a95SMiroslav Benesendif
84343bd3a95SMiroslav Benes
844e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
845e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
846e8e69931SSam Ravnborg
8471da177e4SLinus Torvalds# warn about C99 declaration after statement
848a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
8491da177e4SLinus Torvalds
8500bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
8518289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
8520bb95f80SKees Cook
853070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
854fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
8551da177e4SLinus Torvalds
856217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
857217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
858217c3e01SStephen Rothwell
859fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
860a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
861d0115552SLinus Torvalds
86287e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this
86387e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we
86487e0d4f0SDaniel Borkmann# need to disable it here generally.
86587e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fno-merge-all-constants)
86687e0d4f0SDaniel Borkmann
86787e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine
86887e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled.
86987e0d4f0SDaniel BorkmannKBUILD_CFLAGS	+= $(call cc-option,-fmerge-constants)
87087e0d4f0SDaniel Borkmann
8713ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
8723ce120b1SLinus TorvaldsKBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
8733ce120b1SLinus Torvalds
8748f7f5c9fSAndi Kleen# conserve stack if available
8758f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
8768f7f5c9fSAndi Kleen
877fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
878fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
879fe7c36c7SJosh Triplett
880ea8daa7bSDaniel Wagner# enforce correct pointer usage
881ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
882ea8daa7bSDaniel Wagner
883c834f0e8SKees Cook# Require designated initializers for all marked structures
884c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
885c834f0e8SKees Cook
886a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
887a73619a8SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
888a73619a8SMasahiro Yamada
88940df759eSMichal Marek# use the deterministic mode of AR if available
89040df759eSMichal MarekKBUILD_ARFLAGS := $(call ar-option,D)
89140df759eSMichal Marek
892a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
893a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
894c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
895a86fe353SMasahiro Yamada
89661754c18SMichal Marek# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
89761754c18SMichal Marek# last assignments
89861754c18SMichal MarekKBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
89961754c18SMichal MarekKBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
90061754c18SMichal MarekKBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
90152bcc330SSam Ravnborg
90218991197SRoland McGrath# Use --build-id when available.
9030da4fabdSMasahiro YamadaLDFLAGS_BUILD_ID := $(call ld-option, --build-id)
9046588169dSSam RavnborgKBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
90518991197SRoland McGrathLDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
90618991197SRoland McGrath
9075d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
908d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
9095d7d18f5SDavid Howellsendif
9105d7d18f5SDavid Howells
91114516765SLuc Van Oostenryck# insure the checker run with the right endianness
91214516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
91314516765SLuc Van Oostenryck
9141f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
9151f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
9161f2f01b1SLuc Van Oostenryck
9171da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
9181da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
9191da177e4SLinus Torvalds# set in the environment
9201da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
9211da177e4SLinus Torvalds# this default value
9221da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
9231da177e4SLinus Torvalds
9241da177e4SLinus Torvalds#
9251da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
9261da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
9271da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
9281da177e4SLinus Torvalds
9291da177e4SLinus Torvalds#
930f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
931f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
932f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
933f4d4ffc0SJason Cooper#
934f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
935f4d4ffc0SJason Cooper
936f4d4ffc0SJason Cooper#
9371da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
9381da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
939070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
9401da177e4SLinus Torvalds#
9411da177e4SLinus Torvalds
942df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
9431da177e4SLinus Torvaldsexport MODLIB
9441da177e4SLinus Torvalds
945ac031f26STheodore Ts'o#
9462ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
9472ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
9482ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
949177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
9502ea03891SSam Ravnborg
951ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
952ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
9532ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
954ac031f26STheodore Ts'oelse
9552ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
956ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
957ac031f26STheodore Ts'oelse
9582ea03891SSam Ravnborgmod_strip_cmd = true
959ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
960ac031f26STheodore Ts'oexport mod_strip_cmd
961ac031f26STheodore Ts'o
962beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
963beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
964beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
965beb50df3SBertrand Jacquin
966beb50df3SBertrand Jacquinmod_compress_cmd = true
967beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
968beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
9693d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
970beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
971beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
9723d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
973beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
974beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
975beb50df3SBertrand Jacquinexport mod_compress_cmd
976beb50df3SBertrand Jacquin
977d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
9783ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
9793ee550f1SDavid Woodhouse
9803ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
981e2a666d5SRusty Russellelse
982e2a666d5SRusty Russellmod_sign_cmd = true
983e2a666d5SRusty Russellendif
984e2a666d5SRusty Russellexport mod_sign_cmd
985e2a666d5SRusty Russell
986056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
987056d28d1SRolf Eike Beer
9889f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
9899f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
990056d28d1SRolf Eike Beer		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
9919f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
9929f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
9939f0c18aeSJosh Poimboeuf  else
9949f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
9959f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
9969f0c18aeSJosh Poimboeuf  endif
9979f0c18aeSJosh Poimboeufendif
9989f0c18aeSJosh Poimboeuf
999e00d8880SMasahiro YamadaPHONY += prepare0
1000e2a666d5SRusty Russell
10011da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1002cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
10031da177e4SLinus Torvalds
10041da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
10051da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
100637d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
10071da177e4SLinus Torvalds
10081eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
10091eaca4b9SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
10101eaca4b9SMasahiro Yamada			$(drivers-) $(net-) $(libs-) $(virt-))))
10111da177e4SLinus Torvalds
1012f49821eeSNicholas Piggininit-y		:= $(patsubst %/, %/built-in.a, $(init-y))
1013f49821eeSNicholas Piggincore-y		:= $(patsubst %/, %/built-in.a, $(core-y))
1014f49821eeSNicholas Piggindrivers-y	:= $(patsubst %/, %/built-in.a, $(drivers-y))
1015f49821eeSNicholas Pigginnet-y		:= $(patsubst %/, %/built-in.a, $(net-y))
10161da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
1017f49821eeSNicholas Pigginlibs-y2		:= $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
1018f49821eeSNicholas Pigginvirt-y		:= $(patsubst %/, %/built-in.a, $(virt-y))
10191da177e4SLinus Torvalds
10201f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1021d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
1022d151e971SMasahiro Yamada			      $(drivers-y) $(net-y) $(virt-y)
10233a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1)
102495698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
10251f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
1026312a3d09SCao jin# used by scripts/package/Makefile
1027233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
10281da177e4SLinus Torvalds
1029d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
10301da177e4SLinus Torvalds
10313fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
10323fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
10333fdc7d3fSMasahiro Yamadaautoksyms_recursive: $(vmlinux-deps)
10342441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
1035ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
103686556392SNicolas Pitre	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
10372441e78bSNicolas Pitreendif
103823121ca2SNicolas Pitre
10391f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
10401f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
10411f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
10421f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS
10431f50b80aSMasahiro Yamada  KBUILD_MODULES := 1
10441f50b80aSMasahiro Yamadaendif
10451f50b80aSMasahiro Yamada
104607a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
104707a422bbSMasahiro Yamada
104807a422bbSMasahiro Yamada$(autoksyms_h):
104907a422bbSMasahiro Yamada	$(Q)mkdir -p $(dir $@)
105007a422bbSMasahiro Yamada	$(Q)touch $@
105123121ca2SNicolas Pitre
1052fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1053fbe6e37dSNicholas Piggin
1054fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1055fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
1056d503ac53SMasahiro Yamada	$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
1057fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
10582441e78bSNicolas Pitre
10593fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
10601f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
1061741f98feSSam Ravnborg
1062392885eeSMasahiro Yamadatargets := vmlinux
1063392885eeSMasahiro Yamada
10641da177e4SLinus Torvalds# The actual objects are generated when descending,
10651da177e4SLinus Torvalds# make sure no implicit rule kicks in
10661f2bfbd0SSam Ravnborg$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
10671da177e4SLinus Torvalds
10681da177e4SLinus Torvalds# Handle descending into subdirectories listed in $(vmlinux-dirs)
10691da177e4SLinus Torvalds# Preset locale variables to speed up the build process. Limit locale
10701da177e4SLinus Torvalds# tweaks to this spot to avoid wrong language settings when running
10711da177e4SLinus Torvalds# make menuconfig etc.
10721da177e4SLinus Torvalds# Error messages still appears in the original language
10731da177e4SLinus Torvalds
10744f193362SPaul SmithPHONY += $(vmlinux-dirs)
1075059bc9fcSMasahiro Yamada$(vmlinux-dirs): prepare
1076f7adc312SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ need-builtin=1
10771da177e4SLinus Torvalds
1078ba97df45SMasahiro Yamadafilechk_kernel.release = \
10790d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
10800d0e7718SMichal Marek
108183a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
108224512795SMasahiro Yamadainclude/config/kernel.release: FORCE
10830d0e7718SMichal Marek	$(call filechk,kernel.release)
1084cb58455cSSam Ravnborg
1085d8821622SMasahiro Yamada# Additional helpers built in scripts/
1086d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1087d8821622SMasahiro Yamada# in parallel
1088d8821622SMasahiro YamadaPHONY += scripts
108960df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1090d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1091cb58455cSSam Ravnborg
10921da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
10935bb78269SSam Ravnborg# or the modules are listed in "prepare".
10945bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
10955bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
10965bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
10971da177e4SLinus Torvalds
10984f1c1008SMasahiro YamadaPHONY += prepare archprepare prepare1 prepare3
10995bb78269SSam Ravnborg
110086feeaa8SSam Ravnborg# prepare3 is used to check if we are building in a separate output directory,
11011da177e4SLinus Torvalds# and if so do:
11021da177e4SLinus Torvalds# 1) Check that make has not been executed in the kernel src $(srctree)
1103f1d28fb0SRoman Zippelprepare3: include/config/kernel.release
1104a9a49c2aSMasahiro Yamadaifneq ($(srctree),.)
1105fd54f502SMike Frysinger	@$(kecho) '  Using $(srctree) as source for kernel'
1106a788b2edSMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
1107a788b2edSMasahiro Yamada		 -d $(srctree)/include/config -o \
1108a788b2edSMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
11095369f550SMichal Marek		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
11105369f550SMichal Marek		echo >&2 "  in the '$(srctree)' directory.";\
11111da177e4SLinus Torvalds		/bin/false; \
11121da177e4SLinus Torvalds	fi;
11131da177e4SLinus Torvaldsendif
11141da177e4SLinus Torvalds
11154f1c1008SMasahiro Yamadaprepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \
11164f1c1008SMasahiro Yamada						include/generated/utsrelease.h
11177bb9d092SSam Ravnborg	$(cmd_crmodverdir)
11181da177e4SLinus Torvalds
1119668c35f6SLinus Torvaldsarchprepare: archheaders archscripts prepare1 scripts
11205bb78269SSam Ravnborg
112165bba042SMasahiro Yamadaprepare0: archprepare
112260df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
11238d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
112486feeaa8SSam Ravnborg
11251da177e4SLinus Torvalds# All the preparing..
1126b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1127b9ab5ebbSJosh Poimboeuf
11282c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
11297d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
11307d0e5c20SMasahiro Yamada
11312c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
11322c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1133037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1134037fc336SMasahiro Yamada	generic=include/asm-generic
11352c1f4f12SMasahiro Yamadauapi-asm-generic:
1136037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1137037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
11382c1f4f12SMasahiro Yamada
1139b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
11403b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1141ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1)
1142ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC
1143ef7cfd00SMasahiro Yamada	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1144ef7cfd00SMasahiro Yamada	@false
1145ef7cfd00SMasahiro Yamadaelse
1146ef7cfd00SMasahiro Yamada	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1147ef7cfd00SMasahiro Yamadaendif
1148ef7cfd00SMasahiro Yamadaendif
11491da177e4SLinus Torvalds
11501da177e4SLinus Torvalds# Generate some files
11511da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11521da177e4SLinus Torvalds
11531da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
11541da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
11551da177e4SLinus Torvalds
11561da177e4SLinus Torvaldsuts_len := 64
115763104eecSSam Ravnborgdefine filechk_utsrelease.h
11581da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
11591da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
11601da177e4SLinus Torvalds	  exit 1;                                                         \
11611da177e4SLinus Torvalds	fi;                                                               \
1162ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
11631da177e4SLinus Torvaldsendef
11641da177e4SLinus Torvalds
116563104eecSSam Ravnborgdefine filechk_version.h
1166ad774086SMasahiro Yamada	echo \#define LINUX_VERSION_CODE $(shell                         \
116778d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1168ad774086SMasahiro Yamada	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
116963104eecSSam Ravnborgendef
117063104eecSSam Ravnborg
117143fee2b2SMasahiro Yamada$(version_h): FORCE
11721da177e4SLinus Torvalds	$(call filechk,version.h)
1173223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
11741da177e4SLinus Torvalds
1175273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
117663104eecSSam Ravnborg	$(call filechk,utsrelease.h)
117763104eecSSam Ravnborg
1178179efcb4SVegard NossumPHONY += headerdep
1179179efcb4SVegard Nossumheaderdep:
11809663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
11819663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1182179efcb4SVegard Nossum
11831da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11848d730cfbSDavid Woodhouse# Kernel headers
11858d730cfbSDavid Woodhouse
1186e6883b18SSam Ravnborg#Default location for installed headers
1187e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1188e6883b18SSam Ravnborg
118959b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
119059b2bd05SMasahiro Yamada      cmd_headers_install = \
119159b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
119259b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
119359b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
11946d716275SDavid Woodhouse
11958d730cfbSDavid WoodhousePHONY += headers_install
119659b2bd05SMasahiro Yamadaheaders_install: headers
119759b2bd05SMasahiro Yamada	$(call cmd,headers_install)
119859b2bd05SMasahiro Yamada
119959b2bd05SMasahiro YamadaPHONY += archheaders archscripts
120059b2bd05SMasahiro Yamada
1201a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1202a5bae54cSMasahiro Yamada
120359b2bd05SMasahiro YamadaPHONY += headers
120459b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
12059d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
12062fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1207d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1208d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
12091f85712eSMike Frysinger
121068475359SDavid WoodhousePHONY += headers_check
121159b2bd05SMasahiro Yamadaheaders_check: headers
1212d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1213d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1
121468475359SDavid Woodhouse
1215e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
121659b2bd05SMasahiro Yamadaprepare: headers
1217e949f4c2SMasahiro Yamadaendif
1218e949f4c2SMasahiro Yamada
1219257edce6SMasahiro Yamadaifdef CONFIG_HEADERS_CHECK
1220257edce6SMasahiro Yamadaall: headers_check
1221257edce6SMasahiro Yamadaendif
1222257edce6SMasahiro Yamada
1223bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1224bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1225bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1226bdd7714bSMasahiro Yamada
12278d730cfbSDavid Woodhouse# ---------------------------------------------------------------------------
12285a5da78bSShuah Khan# Kernel selftest
12295a5da78bSShuah Khan
12305a5da78bSShuah KhanPHONY += kselftest
12315a5da78bSShuah Khankselftest:
12322bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
12335a5da78bSShuah Khan
1234801d2e9fSShuah KhanPHONY += kselftest-clean
1235dcb825a9SWang Longkselftest-clean:
12362bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
1237dcb825a9SWang Long
12383d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
12393d6dee7aSBamvor Jian Zhangkselftest-merge:
12403d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
12416d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
12426d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
12433d6dee7aSBamvor Jian Zhang	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
12443d6dee7aSBamvor Jian Zhang
12455a5da78bSShuah Khan# ---------------------------------------------------------------------------
124637c8a5faSRob Herring# Devicetree files
124737c8a5faSRob Herring
124837c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
124937c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
125037c8a5faSRob Herringendif
125137c8a5faSRob Herring
125237c8a5faSRob Herringifneq ($(dtstree),)
125337c8a5faSRob Herring
125437c8a5faSRob Herring%.dtb: prepare3 scripts_dtc
125537c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
125637c8a5faSRob Herring
12574f0e3a57SRob HerringPHONY += dtbs dtbs_install dt_binding_check
12584f0e3a57SRob Herringdtbs dtbs_check: prepare3 scripts_dtc
125937c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
126037c8a5faSRob Herring
12614f0e3a57SRob Herringdtbs_check: export CHECK_DTBS=1
12624f0e3a57SRob Herringdtbs_check: dt_binding_check
12634f0e3a57SRob Herring
126437c8a5faSRob Herringdtbs_install:
126537c8a5faSRob Herring	$(Q)$(MAKE) $(dtbinst)=$(dtstree)
126637c8a5faSRob Herring
126737c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
126837c8a5faSRob Herringall: dtbs
126937c8a5faSRob Herringendif
127037c8a5faSRob Herring
127137c8a5faSRob Herringendif
127237c8a5faSRob Herring
127337c8a5faSRob HerringPHONY += scripts_dtc
127437c8a5faSRob Herringscripts_dtc: scripts_basic
127537c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
127637c8a5faSRob Herring
12774f0e3a57SRob Herringdt_binding_check: scripts_dtc
12784f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
12794f0e3a57SRob Herring
128037c8a5faSRob Herring# ---------------------------------------------------------------------------
12811da177e4SLinus Torvalds# Modules
12821da177e4SLinus Torvalds
12831da177e4SLinus Torvaldsifdef CONFIG_MODULES
12841da177e4SLinus Torvalds
12851da177e4SLinus Torvalds# By default, build modules as well
12861da177e4SLinus Torvalds
128773d1393eSMichal Marekall: modules
12881da177e4SLinus Torvalds
12891da177e4SLinus Torvalds# Build modules
1290551559e1STejun Heo#
1291551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1292551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1293551559e1STejun Heo# using awk while concatenating to the final file.
12941da177e4SLinus Torvalds
12954f193362SPaul SmithPHONY += modules
129668980b47SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin
1297fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1298b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
12993a48a919SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
13001da177e4SLinus Torvalds
130168980b47SMasahiro Yamadamodules.order: $(vmlinux-dirs)
130268980b47SMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@
130368980b47SMasahiro Yamada
130450ef0cdfSMasahiro Yamadamodbuiltin-dirs := $(addprefix _modbuiltin_, $(vmlinux-dirs))
1305a6c36632SMichal Marek
130650ef0cdfSMasahiro Yamadamodules.builtin: $(modbuiltin-dirs)
130750ef0cdfSMasahiro Yamada	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@
1308a6c36632SMichal Marek
130950ef0cdfSMasahiro YamadaPHONY += $(modbuiltin-dirs)
131050ef0cdfSMasahiro Yamada# tristate.conf is not included from this Makefile. Add it as a prerequisite
131150ef0cdfSMasahiro Yamada# here to make it self-healing in case somebody accidentally removes it.
131250ef0cdfSMasahiro Yamada$(modbuiltin-dirs): include/config/tristate.conf
131350ef0cdfSMasahiro Yamada	$(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@)
13141da177e4SLinus Torvalds
13151da177e4SLinus Torvalds# Target to prepare building external modules
13164f193362SPaul SmithPHONY += modules_prepare
1317059bc9fcSMasahiro Yamadamodules_prepare: prepare
13181da177e4SLinus Torvalds
13191da177e4SLinus Torvalds# Target to install modules
13204f193362SPaul SmithPHONY += modules_install
13211da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
13221da177e4SLinus Torvalds
13234f193362SPaul SmithPHONY += _modinst_
13242da30e70SMichal Marek_modinst_:
13251da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
13261da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
13271da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
13288e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
13291da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
13301da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
13317e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
13321da177e4SLinus Torvalds	fi
1333551559e1STejun Heo	@cp -f $(objtree)/modules.order $(MODLIB)/
1334bc081dd6SMichal Marek	@cp -f $(objtree)/modules.builtin $(MODLIB)/
1335898490c0SAlexey Gladkov	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1336b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
13371da177e4SLinus Torvalds
133850a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
13391da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
13401da177e4SLinus Torvalds# boot script depmod is the master version.
13414f193362SPaul SmithPHONY += _modinst_post
13426d128e1eSLinus Torvalds_modinst_post: _modinst_
134350a8ec31SSam Ravnborg	$(call cmd,depmod)
13441da177e4SLinus Torvalds
1345d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1346d890f510SJosh BoyerPHONY += modules_sign
1347d890f510SJosh Boyermodules_sign:
1348d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1349d890f510SJosh Boyerendif
1350d890f510SJosh Boyer
13511da177e4SLinus Torvaldselse # CONFIG_MODULES
13521da177e4SLinus Torvalds
13531da177e4SLinus Torvalds# Modules not configured
13541da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13551da177e4SLinus Torvalds
1356612e47ceSMasahiro YamadaPHONY += modules modules_install
1357612e47ceSMasahiro Yamadamodules modules_install:
13585369f550SMichal Marek	@echo >&2
13595369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
13605369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
13615369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
13625369f550SMichal Marek	@echo >&2
13631da177e4SLinus Torvalds	@exit 1
13641da177e4SLinus Torvalds
13651da177e4SLinus Torvaldsendif # CONFIG_MODULES
13661da177e4SLinus Torvalds
13671da177e4SLinus Torvalds###
13681da177e4SLinus Torvalds# Cleaning is done on three levels.
13691da177e4SLinus Torvalds# make clean     Delete most generated files
13701da177e4SLinus Torvalds#                Leave enough to build external modules
13711da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
13721da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
13731da177e4SLinus Torvalds
13741da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1375fbfa9be9SMasahiro YamadaCLEAN_DIRS  += $(MODVERDIR) include/ksym
1376898490c0SAlexey GladkovCLEAN_FILES += modules.builtin.modinfo
13771da177e4SLinus Torvalds
13781da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1379d6fc9fcbSMasahiro YamadaMRPROPER_DIRS  += include/config include/generated          \
1380a788b2edSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .tmp_objdiff
1381278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \
1382d5b71936SRusty Russell		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1383fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1384fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
13853ee7b3faSJan Kiszka		  signing_key.x509.signer vmlinux-gdb.py
13861da177e4SLinus Torvalds
13871da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
13881da177e4SLinus Torvalds#
13891da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
13901da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
13911eaca4b9SMasahiro Yamadaclean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs))
13921da177e4SLinus Torvalds
1393bd1ee804SPawel MollPHONY += $(clean-dirs) clean archclean vmlinuxclean
13941da177e4SLinus Torvalds$(clean-dirs):
13951da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
13961da177e4SLinus Torvalds
1397bd1ee804SPawel Mollvmlinuxclean:
1398bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1399fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1400bd1ee804SPawel Moll
1401bd1ee804SPawel Mollclean: archclean vmlinuxclean
14021da177e4SLinus Torvalds
14031da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
14041da177e4SLinus Torvalds#
14051da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
14061da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1407cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
14081da177e4SLinus Torvalds
1409b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
14101da177e4SLinus Torvalds$(mrproper-dirs):
14111da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
14121da177e4SLinus Torvalds
1413b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
14141da177e4SLinus Torvalds	$(call cmd,rmdirs)
14151da177e4SLinus Torvalds	$(call cmd,rmfiles)
14161da177e4SLinus Torvalds
14171da177e4SLinus Torvalds# distclean
14181da177e4SLinus Torvalds#
14194f193362SPaul SmithPHONY += distclean
14201da177e4SLinus Torvalds
14211da177e4SLinus Torvaldsdistclean: mrproper
14221da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
14231da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1424f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1425f78271dfSMasahiro Yamada		-o -name 'core' \) \
14261da177e4SLinus Torvalds		-type f -print | xargs rm -f
14271da177e4SLinus Torvalds
14281da177e4SLinus Torvalds
14291da177e4SLinus Torvalds# Packaging of the kernel to various formats
14301da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1431c79624c1SMichal Marekpackage-dir	:= scripts/package
14321da177e4SLinus Torvalds
1433bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1434bafb6747SArnaldo Carvalho de Melo	$(Q)$(MAKE) $(build)=$(package-dir) $@
1435031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
14366c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
14371da177e4SLinus Torvalds
14381da177e4SLinus Torvalds
14391da177e4SLinus Torvalds# Brief documentation of the typical targets used
14401da177e4SLinus Torvalds# ---------------------------------------------------------------------------
14411da177e4SLinus Torvalds
14425dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1443a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
14445dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
14455dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
14461da177e4SLinus Torvalds
1447fe69b420SMasahiro YamadaPHONY += help
14481da177e4SLinus Torvaldshelp:
14491da177e4SLinus Torvalds	@echo  'Cleaning targets:'
14505ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
14515cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
14525ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
14535cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
14541da177e4SLinus Torvalds	@echo  ''
14551da177e4SLinus Torvalds	@echo  'Configuration targets:'
14561da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
14571da177e4SLinus Torvalds	@echo  ''
14581da177e4SLinus Torvalds	@echo  'Other generic targets:'
14591da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
14601da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
14611da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
14629cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
14631da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
146440ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1465433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1466433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
146762718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
146862718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1469155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1470c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
14711da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
14721da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1473f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
14743f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
14753f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
14763f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
14772fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
147859df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
14792fb9b1bdSSam Ravnborg	 echo  ''
148031b8cc80SRandy Dunlap	@echo  'Static analysers:'
14811da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
14821da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1483aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1484ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1485295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1486179efcb4SVegard Nossum	@echo  '  headers_check   - Sanity check on exported headers'
148774425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
14887f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
148974425eeeSNicolas Palix	@echo  ''
149031b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
14915a5da78bSShuah Khan	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
14925a5da78bSShuah Khan	@echo  '                    Build, install, and boot kernel before'
14935a5da78bSShuah Khan	@echo  '                    running kselftest on it'
1494dcb825a9SWang Long	@echo  '  kselftest-clean - Remove all generated kselftest files'
1495bbfe63b6SRandy Dunlap	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existing'
14963d6dee7aSBamvor Jian Zhang	@echo  '                    .config.'
14975a5da78bSShuah Khan	@echo  ''
149837c8a5faSRob Herring	@$(if $(dtstree), \
149937c8a5faSRob Herring		echo 'Devicetree:'; \
150037c8a5faSRob Herring		echo '* dtbs            - Build device tree blobs for enabled boards'; \
150137c8a5faSRob Herring		echo '  dtbs_install    - Install dtbs to $(INSTALL_DTBS_PATH)'; \
150237c8a5faSRob Herring		echo '')
150337c8a5faSRob Herring
150431b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
150531b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
150631b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
150731b8cc80SRandy Dunlap	@echo  ''
15081da177e4SLinus Torvalds	@echo  'Kernel packaging:'
15096c2133e1SSam Ravnborg	@$(MAKE) $(build)=$(package-dir) help
15101da177e4SLinus Torvalds	@echo  ''
15111da177e4SLinus Torvalds	@echo  'Documentation targets:'
1512cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
15131da177e4SLinus Torvalds	@echo  ''
151401dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
15151da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
151601dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
15171da177e4SLinus Torvalds	@echo  ''
15181da177e4SLinus Torvalds	@$(if $(boards), \
15191da177e4SLinus Torvalds		$(foreach b, $(boards), \
15201da177e4SLinus Torvalds		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
15211da177e4SLinus Torvalds		echo '')
15225dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
15235dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
15245dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
15255dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
15265dffbe81SSegher Boessenkool		echo '')
15271da177e4SLinus Torvalds
15281da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
152945d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
15301da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
15319ba26a72SCao jin	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1532701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1533af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
153428bc20dcSSam Ravnborg	@echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
153528bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
153628bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
153728bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1538a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
15391da177e4SLinus Torvalds	@echo  ''
15401da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
15411da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
15421da177e4SLinus Torvalds
15431da177e4SLinus Torvalds
15445dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
15455dffbe81SSegher Boessenkool
15465dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
15475dffbe81SSegher Boessenkool
1548fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
15495dffbe81SSegher Boessenkool
15505dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
15515dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
15525dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
15535dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
15545dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
15555dffbe81SSegher Boessenkool		echo '')
15565dffbe81SSegher Boessenkool
15575dffbe81SSegher Boessenkool
15581da177e4SLinus Torvalds# Documentation targets
15591da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1560e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1561e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
156222cba31bSJani NikulaPHONY += $(DOC_TARGETS)
156322cba31bSJani Nikula$(DOC_TARGETS): scripts_basic FORCE
1564cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
15651da177e4SLinus Torvalds
156667274c08SMasahiro Yamada# Misc
156767274c08SMasahiro Yamada# ---------------------------------------------------------------------------
156867274c08SMasahiro Yamada
156967274c08SMasahiro YamadaPHONY += scripts_gdb
15707a739ce5SMasahiro Yamadascripts_gdb: prepare0
15711e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
15728d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
157367274c08SMasahiro Yamada
157467274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
157567274c08SMasahiro Yamadaall: scripts_gdb
157667274c08SMasahiro Yamadaendif
157767274c08SMasahiro Yamada
15781da177e4SLinus Torvaldselse # KBUILD_EXTMOD
15791da177e4SLinus Torvalds
15801da177e4SLinus Torvalds###
15811da177e4SLinus Torvalds# External module support.
15821da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
15831da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
15841da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
15851da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
15861da177e4SLinus Torvalds# be used.
15871da177e4SLinus Torvalds#
15881da177e4SLinus Torvalds# The following are the only valid targets when building external
15891da177e4SLinus Torvalds# modules.
15901da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
15911da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
15921da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
15931da177e4SLinus Torvalds# make M=dir modules_install
1594070b98bfSSam Ravnborg#                      Install the modules built in the module directory
15951da177e4SLinus Torvalds#                      Assumes install directory is already created
15961da177e4SLinus Torvalds
15971da177e4SLinus Torvalds# We are always building modules
15981da177e4SLinus TorvaldsKBUILD_MODULES := 1
15991da177e4SLinus Torvalds
16004f193362SPaul SmithPHONY += $(objtree)/Module.symvers
16011da177e4SLinus Torvalds$(objtree)/Module.symvers:
16021da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
16031da177e4SLinus Torvalds	echo; \
16041da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
16051da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
16061da177e4SLinus Torvalds	echo )
16071da177e4SLinus Torvalds
16081da177e4SLinus Torvaldsmodule-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
16094f193362SPaul SmithPHONY += $(module-dirs) modules
1610e07db28eSMasahiro Yamada$(module-dirs): prepare $(objtree)/Module.symvers
16111da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
16121da177e4SLinus Torvalds
16131da177e4SLinus Torvaldsmodules: $(module-dirs)
1614fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1615b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
16161da177e4SLinus Torvalds
16174f193362SPaul SmithPHONY += modules_install
1618a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1619a67dc21aSSam Ravnborg
1620a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
16214f193362SPaul SmithPHONY += _emodinst_
1622a67dc21aSSam Ravnborg_emodinst_:
1623a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1624b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
16251da177e4SLinus Torvalds
16264f193362SPaul SmithPHONY += _emodinst_post
1627a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1628a67dc21aSSam Ravnborg	$(call cmd,depmod)
1629a67dc21aSSam Ravnborg
16301da177e4SLinus Torvaldsclean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
16311da177e4SLinus Torvalds
16324f193362SPaul SmithPHONY += $(clean-dirs) clean
16331da177e4SLinus Torvalds$(clean-dirs):
16341da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
16351da177e4SLinus Torvalds
16361da177e4SLinus Torvaldsclean:	rm-dirs := $(MODVERDIR)
163788d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
16381da177e4SLinus Torvalds
1639fe69b420SMasahiro YamadaPHONY += help
16401da177e4SLinus Torvaldshelp:
16411da177e4SLinus Torvalds	@echo  '  Building external modules.'
16421da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
16431da177e4SLinus Torvalds	@echo  ''
16441da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
16451da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
16461da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
16471da177e4SLinus Torvalds	@echo  ''
164806300b21SSam Ravnborg
1649059bc9fcSMasahiro YamadaPHONY += prepare
1650e07db28eSMasahiro Yamadaprepare:
1651e07db28eSMasahiro Yamada	$(cmd_crmodverdir)
16521da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
16531da177e4SLinus Torvalds
165488d7be03SMichal Marekclean: $(clean-dirs)
165588d7be03SMichal Marek	$(call cmd,rmdirs)
165688d7be03SMichal Marek	$(call cmd,rmfiles)
165743f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1658ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
16594f0e3a57SRob Herring		-o -name '*.ko.*' \
16604f0e3a57SRob Herring		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1661ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1662d523b255SRasmus Villemoes		-o -name '*.su'  \
166388d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
16649a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
16654fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
166688d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
166788d7be03SMichal Marek		-o -name modules.builtin -o -name '.tmp_*.o.*' \
16686b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1669433db3e2SVinícius Tinti		-o -name '*.ll' \
167088d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
167188d7be03SMichal Marek
16721da177e4SLinus Torvalds# Generate tags for editors
16731da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1674a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1675a680eedcSSam Ravnborg      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
16761da177e4SLinus Torvalds
1677f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
16781da177e4SLinus Torvalds	$(call cmd,tags)
16791da177e4SLinus Torvalds
16801da177e4SLinus Torvalds# Scripts to check various things for consistency
16811da177e4SLinus Torvalds# ---------------------------------------------------------------------------
16821da177e4SLinus Torvalds
1683279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1684279f3dd3SPeter Foley
16851da177e4SLinus Torvaldsincludecheck:
1686436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
16871da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
168880007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
16891da177e4SLinus Torvalds
16901da177e4SLinus Torvaldsversioncheck:
16912ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
16921da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
169380007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
16941da177e4SLinus Torvalds
169574425eeeSNicolas Palixcoccicheck:
169674425eeeSNicolas Palix	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
169774425eeeSNicolas Palix
16981da177e4SLinus Torvaldsnamespacecheck:
16991da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
17001da177e4SLinus Torvalds
1701295ac051SAdrian Bunkexport_report:
1702295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1703295ac051SAdrian Bunk
1704c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1705e3ccf6e3SJeff Dike
1706011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1707011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1708011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1709011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1710011e3a9aSJeff Dikeifeq ($(ARCH), um)
1711011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1712011e3a9aSJeff Dikeelse
1713011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1714011e3a9aSJeff Dikeendif
17151da177e4SLinus Torvaldscheckstack:
17161da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1717*75dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
17181da177e4SLinus Torvalds
17197b8ea53dSAmerigo Wangkernelrelease:
17207b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
172101ab1788SAmerigo Wang
1722cb58455cSSam Ravnborgkernelversion:
17232244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
17241da177e4SLinus Torvalds
1725c398ff00SMike Marciniszynimage_name:
1726c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1727c398ff00SMike Marciniszyn
1728ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1729f47a23ceSMasahiro Yamada
1730f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_)
1731f47a23ceSMasahiro Yamadatools_silent=s
1732f47a23ceSMasahiro Yamadaendif
1733f47a23ceSMasahiro Yamada
1734ea01fa9fSBorislav Petkovtools/: FORCE
1735bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1736*75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1737ea01fa9fSBorislav Petkov
1738ea01fa9fSBorislav Petkovtools/%: FORCE
1739bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1740*75dd4747SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1741ea01fa9fSBorislav Petkov
174206300b21SSam Ravnborg# Single targets
174306300b21SSam Ravnborg# ---------------------------------------------------------------------------
1744bc2546a6SSam Ravnborg# Single targets are compatible with:
1745e1b8513dSRobert P. J. Day# - build with mixed source and output
1746bc2546a6SSam Ravnborg# - build with separate output dir 'make O=...'
1747bc2546a6SSam Ravnborg# - external modules
1748bc2546a6SSam Ravnborg#
1749bc2546a6SSam Ravnborg#  target-dir => where to store outputfile
1750bc2546a6SSam Ravnborg#  build-dir  => directory in kernel source tree to use
175106300b21SSam Ravnborg
17526b12de69SMasahiro Yamadabuild-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@
17536b12de69SMasahiro Yamadabuild-dir = $(patsubst %/,%,$(dir $(build-target)))
175406300b21SSam Ravnborg
17556b12de69SMasahiro Yamada%.i: prepare FORCE
17566b12de69SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
17576b12de69SMasahiro Yamada%.ll: prepare FORCE
17586b12de69SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
17596b12de69SMasahiro Yamada%.lst: prepare FORCE
17606b12de69SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
17616b12de69SMasahiro Yamada%.o: prepare FORCE
17626b12de69SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
17636b12de69SMasahiro Yamada%.s: prepare FORCE
17646b12de69SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
17656b12de69SMasahiro Yamada%.symtypes: prepare FORCE
17666b12de69SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
17676b12de69SMasahiro Yamada%.ko: %.o
17686b12de69SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1769bc2546a6SSam Ravnborg
1770bc2546a6SSam Ravnborg# Modules
17716d3c94e4SMasahiro YamadaPHONY += /
17726d3c94e4SMasahiro Yamada/: ./
17736d3c94e4SMasahiro Yamada
1774059bc9fcSMasahiro Yamada%/: prepare FORCE
1775648ad9b1SMasahiro Yamada	$(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir)
177606300b21SSam Ravnborg
17771da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
17781da177e4SLinus Torvalds# ===========================================================================
17791da177e4SLinus Torvalds
17801da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
17811da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
17821da177e4SLinus Torvalds
17831da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
17841da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
17851da177e4SLinus Torvalds
1786bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
178750a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1788569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
17895a144a1aSMasahiro Yamada                   $(KERNELRELEASE)
179050a8ec31SSam Ravnborg
17917bb9d092SSam Ravnborg# Create temporary dir for module support files
1792ab19f879SSam Ravnborg# clean it up only when building all modules
1793ab19f879SSam Ravnborgcmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1794ab19f879SSam Ravnborg                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
17951da177e4SLinus Torvalds
1796392885eeSMasahiro Yamada# read saved command lines for existing targets
1797392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
17981da177e4SLinus Torvalds
1799b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
18001da177e4SLinus Torvalds
180125815cf5SMasahiro Yamadaendif   # ifeq ($(config-targets),1)
180225815cf5SMasahiro Yamadaendif   # ifeq ($(mixed-targets),1)
1803688931a5SMasahiro Yamadaendif   # need-sub-make
18041da177e4SLinus Torvalds
18054f193362SPaul SmithPHONY += FORCE
18061da177e4SLinus TorvaldsFORCE:
18074f193362SPaul Smith
1808bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
1809fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
18104f193362SPaul Smith.PHONY: $(PHONY)
1811