1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2bfeffd15SLinus TorvaldsVERSION = 5 3b3a9e3b9SLinus TorvaldsPATCHLEVEL = 8 455922c9dSLinus TorvaldsSUBLEVEL = 0 5b3a9e3b9SLinus TorvaldsEXTRAVERSION = -rc1 6d6d5df1dSLinus TorvaldsNAME = Kleptomaniac Octopus 71da177e4SLinus Torvalds 81da177e4SLinus Torvalds# *DOCUMENTATION* 91da177e4SLinus Torvalds# To see a list of typical targets execute "make help" 101da177e4SLinus Torvalds# More info can be located in ./README 111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not 121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file. 131da177e4SLinus Torvalds 14121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \ 15121c2a13SMasahiro Yamada $(error targets prefixed with '__' are only for internal use)) 16121c2a13SMasahiro Yamada 17ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 18121c2a13SMasahiro YamadaPHONY := __all 19121c2a13SMasahiro Yamada__all: 20ba634eceSMasahiro Yamada 211da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 221da177e4SLinus Torvalds# to get the ordering right. 231da177e4SLinus Torvalds# 241da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 251da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 261da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 27f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 281da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 291da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 301da177e4SLinus Torvalds# is now up to date. 311da177e4SLinus Torvalds# 321da177e4SLinus Torvalds# The only cases where we need to modify files which have global 331da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 341da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 351da177e4SLinus Torvalds# prepare rule. 361da177e4SLinus Torvalds 37221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 383812b8c5SMasahiro Yamada 393812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 403812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 413812b8c5SMasahiro YamadaMAKEFLAGS += -rR 423812b8c5SMasahiro Yamada 433812b8c5SMasahiro Yamada# Avoid funny character set dependencies 443812b8c5SMasahiro Yamadaunexport LC_ALL 453812b8c5SMasahiro YamadaLC_COLLATE=C 463812b8c5SMasahiro YamadaLC_NUMERIC=C 473812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 483812b8c5SMasahiro Yamada 493812b8c5SMasahiro Yamada# Avoid interference with shell env settings 503812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 513812b8c5SMasahiro Yamada 52066b7ed9SMichal Marek# Beautify output 53066b7ed9SMichal Marek# --------------------------------------------------------------------------- 54066b7ed9SMichal Marek# 55066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 56066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 57066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 58066b7ed9SMichal Marek# 59066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 60066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 61066b7ed9SMichal Marek# 62066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 63066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 64066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 65066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 66066b7ed9SMichal Marek# 67066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 68066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 69066b7ed9SMichal Marek# 70066b7ed9SMichal Marek# $(Q)ln $@ :< 71066b7ed9SMichal Marek# 72066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 73066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 74505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 75066b7ed9SMichal Marek# 761da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 771da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 781da177e4SLinus Torvalds 791da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 801da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 811da177e4SLinus Torvaldsendif 821da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 831da177e4SLinus Torvalds KBUILD_VERBOSE = 0 841da177e4SLinus Torvaldsendif 851da177e4SLinus Torvalds 86066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 87066b7ed9SMichal Marek quiet = 88066b7ed9SMichal Marek Q = 89066b7ed9SMichal Marekelse 90066b7ed9SMichal Marek quiet=quiet_ 91066b7ed9SMichal Marek Q = @ 92066b7ed9SMichal Marekendif 93066b7ed9SMichal Marek 94066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 95066b7ed9SMichal Marek# commands 96066b7ed9SMichal Marek 976f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 98066b7ed9SMichal Marek quiet=silent_ 99066b7ed9SMichal Marekendif 100066b7ed9SMichal Marek 101066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 102066b7ed9SMichal Marek 10325b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 10425b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 10525b146c5SMasahiro Yamada# 10625b146c5SMasahiro Yamada# For example, you can do this: 10725b146c5SMasahiro Yamada# 10825b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 10925b146c5SMasahiro Yamada# 11025b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 11125b146c5SMasahiro Yamada# two syntaxes to specify it. 11225b146c5SMasahiro Yamada# 1131da177e4SLinus Torvalds# 1) O= 1141da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1151da177e4SLinus Torvalds# 1161da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 11725b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 11825b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1191da177e4SLinus Torvalds# 1201da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1211da177e4SLinus Torvalds# variable. 1221da177e4SLinus Torvalds 12325b146c5SMasahiro Yamada# Do we want to change the working directory? 1241da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1251da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1261da177e4SLinus Torvaldsendif 1271da177e4SLinus Torvalds 12825b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 12925b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 13025b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 13125b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 13225b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 13325b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 13425b146c5SMasahiro Yamada 13525b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 13625b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 13725b146c5SMasahiro Yamadaelse 13825b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 13925b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 14025b146c5SMasahiro Yamada 14125b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 14225b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 14325b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 14425b146c5SMasahiro Yamadaelse 14525b146c5SMasahiro Yamadaneed-sub-make := 1 14651193b76SRobert Jarzmikendif 14751193b76SRobert Jarzmik 14825b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 1491da177e4SLinus Torvalds 15025b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 15125b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 15225b146c5SMasahiro Yamadaendif 15325b146c5SMasahiro Yamada 15425b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 15580463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 15680463f1bSMasahiro Yamada# 15780463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed 15825b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make. 15925b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 160688931a5SMasahiro Yamadaneed-sub-make := 1 16125b146c5SMasahiro Yamadaendif 1623812b8c5SMasahiro Yamada 16393fdddfeSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 16493fdddfeSMasahiro Yamada 165688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 166688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 167688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 168688931a5SMasahiro Yamadaneed-sub-make := 1 169688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 17093fdddfeSMasahiro Yamada$(this-makefile): ; 171688931a5SMasahiro Yamadaendif 172688931a5SMasahiro Yamada 17325b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 174221cc2d2SMasahiro Yamadaexport sub_make_done := 1 175221cc2d2SMasahiro Yamada 176688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 177688931a5SMasahiro Yamada 178121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 1790b35786dSMilton Miller 180121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 18116f89098SCharles Keepax @: 1820b35786dSMilton Miller 183c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 184121c2a13SMasahiro Yamada__sub-make: 18525b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 1861da177e4SLinus Torvalds 187688931a5SMasahiro Yamadaendif # need-sub-make 188221cc2d2SMasahiro Yamadaendif # sub_make_done 189688931a5SMasahiro Yamada 1901da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 191688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 1921da177e4SLinus Torvalds 1937ff52571SMasahiro Yamada# Do not print "Entering directory ...", 1947ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 1957ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 1967ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 1977ff52571SMasahiro Yamada 198aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 199aa55c8e2SMasahiro Yamada# C compilation. 200aa55c8e2SMasahiro Yamada# 201aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 202aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 203aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not. 204aa55c8e2SMasahiro Yamada# 205036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details, 206036db11cSCao jin# including where to get the "sparse" utility. 207aa55c8e2SMasahiro Yamada 208aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line") 209aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = $(C) 210aa55c8e2SMasahiro Yamadaendif 211aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC 212aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = 0 213aa55c8e2SMasahiro Yamadaendif 214aa55c8e2SMasahiro Yamada 2157e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 2167e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 217aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line") 218aa55c8e2SMasahiro Yamada KBUILD_EXTMOD := $(M) 219aa55c8e2SMasahiro Yamadaendif 220aa55c8e2SMasahiro Yamada 221e9e81b63SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \ 222e9e81b63SMasahiro Yamada $(error building multiple external modules is not supported)) 223e9e81b63SMasahiro Yamada 224051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD 225051f278eSMasahiro Yamada 226394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 227394053f4SMasahiro Yamada 22825b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2299da0763bSMichal Marek # building in the source tree 2309da0763bSMichal Marek srctree := . 231051f278eSMasahiro Yamada building_out_of_srctree := 2329da0763bSMichal Marekelse 23325b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2349da0763bSMichal Marek # building in a subdirectory of the source tree 2359da0763bSMichal Marek srctree := .. 2369da0763bSMichal Marek else 23725b146c5SMasahiro Yamada srctree := $(abs_srctree) 2389da0763bSMichal Marek endif 239051f278eSMasahiro Yamada building_out_of_srctree := 1 2409da0763bSMichal Marekendif 2412c1f4f12SMasahiro Yamada 24295fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 24395fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 24495fd3f87SMasahiro Yamadaendif 2452c1f4f12SMasahiro Yamada 2467e1c0477SMichal Marekobjtree := . 2476b12de69SMasahiro YamadaVPATH := $(srctree) 2481da177e4SLinus Torvalds 249051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2501da177e4SLinus Torvalds 2512c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2522c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2532c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2542c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2552c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2562c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2572c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2582c1f4f12SMasahiro Yamada 2592c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2602c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h 2612c1f4f12SMasahiro Yamada 26222340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 26322340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2642c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 26559b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2664623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 2674623980dSDavid Engraf outputmakefile 268a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \ 269a29d4d8cSMasahiro Yamada kernelrelease 270394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 2712c1f4f12SMasahiro Yamada 2722042b548SMasahiro Yamadaconfig-build := 2732042b548SMasahiro Yamadamixed-build := 2742042b548SMasahiro Yamadaneed-config := 1 275d7942413SMasahiro Yamadamay-sync-config := 1 276394053f4SMasahiro Yamadasingle-build := 2772c1f4f12SMasahiro Yamada 2782c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2792c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2802042b548SMasahiro Yamada need-config := 2812c1f4f12SMasahiro Yamada endif 2822c1f4f12SMasahiro Yamadaendif 2832c1f4f12SMasahiro Yamada 284d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 285d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 2862042b548SMasahiro Yamada may-sync-config := 287d7942413SMasahiro Yamada endif 288d7942413SMasahiro Yamadaendif 289d7942413SMasahiro Yamada 290d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 2912042b548SMasahiro Yamada may-sync-config := 292d7942413SMasahiro Yamadaendif 293d7942413SMasahiro Yamada 2942c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 2952c1f4f12SMasahiro Yamada ifneq ($(filter config %config,$(MAKECMDGOALS)),) 2962042b548SMasahiro Yamada config-build := 1 2972c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 2982042b548SMasahiro Yamada mixed-build := 1 2992c1f4f12SMasahiro Yamada endif 3002c1f4f12SMasahiro Yamada endif 3012c1f4f12SMasahiro Yamadaendif 30222340a06SMasahiro Yamada 303394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 304394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 305394053f4SMasahiro Yamada single-build := 1 306394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 307394053f4SMasahiro Yamada mixed-build := 1 308394053f4SMasahiro Yamada endif 309394053f4SMasahiro Yamadaendif 310394053f4SMasahiro Yamada 31122340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 31222340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 31322340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3142042b548SMasahiro Yamada mixed-build := 1 31522340a06SMasahiro Yamada endif 31622340a06SMasahiro Yamadaendif 31722340a06SMasahiro Yamada 3182c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3192c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3202c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3212042b548SMasahiro Yamada mixed-build := 1 3222c1f4f12SMasahiro Yamada endif 3232c1f4f12SMasahiro Yamadaendif 3242c1f4f12SMasahiro Yamada 3252042b548SMasahiro Yamadaifdef mixed-build 3262c1f4f12SMasahiro Yamada# =========================================================================== 3272c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3282c1f4f12SMasahiro Yamada# Handle them one by one. 3292c1f4f12SMasahiro Yamada 3302c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3312c1f4f12SMasahiro Yamada 332121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 3332c1f4f12SMasahiro Yamada @: 3342c1f4f12SMasahiro Yamada 3352c1f4f12SMasahiro Yamada__build_one_by_one: 3362c1f4f12SMasahiro Yamada $(Q)set -e; \ 3372c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3382c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3392c1f4f12SMasahiro Yamada done 3402c1f4f12SMasahiro Yamada 3412042b548SMasahiro Yamadaelse # !mixed-build 3422c1f4f12SMasahiro Yamada 3432c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include 3442c1f4f12SMasahiro Yamada 3452c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3462c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 3472c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3482c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3492c1f4f12SMasahiro Yamada 350b2d35fa5SAnders Roxellinclude scripts/subarch.include 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3531da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3541da177e4SLinus Torvalds# 3551da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3561da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3571da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3581da177e4SLinus Torvalds# make ARCH=ia64 3591da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3601da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3631da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3641da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3651da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3661da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3671da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3681da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3691da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3702331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds# Architecture as present in compile.h 3731da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3746752ed90SThomas GleixnerSRCARCH := $(ARCH) 3751da177e4SLinus Torvalds 376d746d647SSam Ravnborg# Additional ARCH settings for x86 377d746d647SSam Ravnborgifeq ($(ARCH),i386) 378d746d647SSam Ravnborg SRCARCH := x86 379d746d647SSam Ravnborgendif 380d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 381d746d647SSam Ravnborg SRCARCH := x86 382d746d647SSam Ravnborgendif 38374b469f2SSam Ravnborg 3845e538790SSam Ravnborg# Additional ARCH settings for sparc 385e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 386e69f58c0SNamhyung Kim SRCARCH := sparc 387e69f58c0SNamhyung Kimendif 388a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 3895e538790SSam Ravnborg SRCARCH := sparc 390a439fe51SSam Ravnborgendif 3912fb9b1bdSSam Ravnborg 3923cc000b5SPaul Mundt# Additional ARCH settings for sh 3933cc000b5SPaul Mundtifeq ($(ARCH),sh64) 3943cc000b5SPaul Mundt SRCARCH := sh 3953cc000b5SPaul Mundtendif 3963cc000b5SPaul Mundt 39714cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 39841263fc6SBen Gardinerexport KCONFIG_CONFIG 39914cdd3c4SRoman Zippel 4002a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile. 4012a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig 4022a86f661SMasahiro Yamada 4031da177e4SLinus Torvalds# SHELL used by kbuild 404858805b3SMasahiro YamadaCONFIG_SHELL := sh 4051da177e4SLinus Torvalds 4066d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4076d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4086d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 409d7f14c66SUwe Kleine-König 410a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 411a0d1c951SMasahiro YamadaHOSTCC = clang 412a0d1c951SMasahiro YamadaHOSTCXX = clang++ 413a0d1c951SMasahiro Yamadaelse 4141da177e4SLinus TorvaldsHOSTCC = gcc 4151da177e4SLinus TorvaldsHOSTCXX = g++ 416a0d1c951SMasahiro Yamadaendif 4177f3a59dbSMasahiro Yamada 4187f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 4197f3a59dbSMasahiro Yamada -O2 -fomit-frame-pointer -std=gnu89 4207f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS := 4217f3a59dbSMasahiro Yamada 4227f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 423735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 424f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 425f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds# Make variables (CC, etc...) 4281da177e4SLinus TorvaldsCPP = $(CC) -E 429a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 430a0d1c951SMasahiro YamadaCC = clang 431a0d1c951SMasahiro YamadaLD = ld.lld 432a0d1c951SMasahiro YamadaAR = llvm-ar 433a0d1c951SMasahiro YamadaNM = llvm-nm 434a0d1c951SMasahiro YamadaOBJCOPY = llvm-objcopy 435a0d1c951SMasahiro YamadaOBJDUMP = llvm-objdump 436a0d1c951SMasahiro YamadaREADELF = llvm-readelf 437a0d1c951SMasahiro YamadaOBJSIZE = llvm-size 438a0d1c951SMasahiro YamadaSTRIP = llvm-strip 439a0d1c951SMasahiro Yamadaelse 440a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 441a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 4421da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4431da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4441da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4451da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 446eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 447a0d1c951SMasahiro YamadaOBJSIZE = $(CROSS_COMPILE)size 448a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 449a0d1c951SMasahiro Yamadaendif 450e83b9f55SAndrii NakryikoPAHOLE = pahole 45173a4f6dbSMasahiro YamadaLEX = flex 45273a4f6dbSMasahiro YamadaYACC = bison 4531da177e4SLinus TorvaldsAWK = awk 454caa27b66SSam RavnborgINSTALLKERNEL := installkernel 4551da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 4561da177e4SLinus TorvaldsPERL = perl 457011bf125SMasahiro YamadaPYTHON = python 458e9781b52SMasahiro YamadaPYTHON3 = python3 4591da177e4SLinus TorvaldsCHECK = sparse 460858805b3SMasahiro YamadaBASH = bash 461e4a42c82SDenis EfremovKGZIP = gzip 462e4a42c82SDenis EfremovKBZIP2 = bzip2 463e4a42c82SDenis EfremovKLZOP = lzop 4648dfb61dcSDenis EfremovLZMA = lzma 4658dfb61dcSDenis EfremovLZ4 = lz4c 4668dfb61dcSDenis EfremovXZ = xz 4678dfb61dcSDenis Efremov 46880a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 4696c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 4700c22be07SDouglas AndersonNOSTDINC_FLAGS := 4716588169dSSam RavnborgCFLAGS_MODULE = 4726588169dSSam RavnborgAFLAGS_MODULE = 4736588169dSSam RavnborgLDFLAGS_MODULE = 4741da177e4SLinus TorvaldsCFLAGS_KERNEL = 4751da177e4SLinus TorvaldsAFLAGS_KERNEL = 476b36fad65SMichal MarekLDFLAGS_vmlinux = 4771da177e4SLinus Torvalds 478abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 479abbf1590SDavid HowellsUSERINCLUDE := \ 4809d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 4819d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 482abbf1590SDavid Howells -I$(srctree)/include/uapi \ 4833308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 484abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 485abbf1590SDavid Howells 4861da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 4871da177e4SLinus Torvalds# Needed to be compatible with the O= option 488abbf1590SDavid HowellsLINUXINCLUDE := \ 4899d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 4909d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 491051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 492f8224f7fSMasahiro Yamada -I$(objtree)/include \ 493f8224f7fSMasahiro Yamada $(USERINCLUDE) 4941da177e4SLinus Torvalds 49542a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 496eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 49742a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 498b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 49951b97e35SKirill A. Shutemov -Wno-format-security \ 500433dc2ebSMasahiro Yamada -std=gnu89 501433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 50280c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 50380c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 5046588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 5056588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 50610df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 50710df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds 508d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 509433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS := 5105241ab4cSMasahiro YamadaCLANG_FLAGS := 5111da177e4SLinus Torvalds 512aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC 513eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL 51494f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 515e4a42c82SDenis Efremovexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ 5167bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 5171da177e4SLinus Torvalds 518d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 5190e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 520dfd402a4SMarco Elverexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN CFLAGS_KCSAN 521222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 5226588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 52380c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds# Files to ignore in find ... statements 5261da177e4SLinus Torvalds 527ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 528ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 529ae63b2d7SPrarit Bhargava -prune -o 530450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 531450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds# =========================================================================== 5341da177e4SLinus Torvalds# Rules shared between *config targets and build targets 5351da177e4SLinus Torvalds 536312a3d09SCao jin# Basic helpers built in scripts/basic/ 5374f193362SPaul SmithPHONY += scripts_basic 5381da177e4SLinus Torvaldsscripts_basic: 5391da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 540638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 5411da177e4SLinus Torvalds 5424f193362SPaul SmithPHONY += outputmakefile 543e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 544fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 545fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 546fd5f0cd6SJan Beulich# output directory. 5473a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 5483a51ff34SVladimir Kondratiev# ignore whole output directory 5491da177e4SLinus Torvaldsoutputmakefile: 550051f278eSMasahiro Yamadaifdef building_out_of_srctree 551e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 552e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 553e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 554e8e83a23SMasahiro Yamada echo >&2 "***"; \ 555e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 556e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 557e8e83a23SMasahiro Yamada echo >&2 "***"; \ 558e8e83a23SMasahiro Yamada false; \ 559e8e83a23SMasahiro Yamada fi 56092979997SAndi Kleen $(Q)ln -fsn $(srctree) source 5614fd61277SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 562156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 563156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 564fd5f0cd6SJan Beulichendif 5651da177e4SLinus Torvalds 56699516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 567ae6b289aSChris Friesifneq ($(CROSS_COMPILE),) 5685241ab4cSMasahiro YamadaCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 569ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 570238bcbc4SMasahiro YamadaCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 571ef8c4ed9SStefan AgnerGCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 572ae6b289aSChris Friesendif 573ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),) 574238bcbc4SMasahiro YamadaCLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 575ae6b289aSChris Friesendif 5767e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1) 577238bcbc4SMasahiro YamadaCLANG_FLAGS += -no-integrated-as 578876a0600SNathan Chancellorendif 579589834b3SNathan ChancellorCLANG_FLAGS += -Werror=unknown-warning-option 580238bcbc4SMasahiro YamadaKBUILD_CFLAGS += $(CLANG_FLAGS) 581238bcbc4SMasahiro YamadaKBUILD_AFLAGS += $(CLANG_FLAGS) 5823bd98050SJoel Stanleyexport CLANG_FLAGS 583ae6b289aSChris Friesendif 584ae6b289aSChris Fries 585315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 586315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 587315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 588315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade. 589902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 590315bab4eSMasahiro Yamada 5912042b548SMasahiro Yamadaifdef config-build 5921da177e4SLinus Torvalds# =========================================================================== 5931da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 5941da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 5951da177e4SLinus Torvalds 5961da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 5971da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 5981da177e4SLinus Torvalds# used for 'make defconfig' 599a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 600315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 6011da177e4SLinus Torvalds 60236de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 60331110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 60431110ebbSSam Ravnborg 60536de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 6061da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 6071da177e4SLinus Torvalds 6082042b548SMasahiro Yamadaelse #!config-build 6091da177e4SLinus Torvalds# =========================================================================== 6101da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 6111da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 6121da177e4SLinus Torvalds 6132c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 614121c2a13SMasahiro Yamada# but instead __all depend on modules 6152c1f4f12SMasahiro YamadaPHONY += all 6162c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 617121c2a13SMasahiro Yamada__all: all 6182c1f4f12SMasahiro Yamadaelse 619121c2a13SMasahiro Yamada__all: modules 6202c1f4f12SMasahiro Yamadaendif 6212c1f4f12SMasahiro Yamada 6222c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 6232c1f4f12SMasahiro Yamada# Normally, just do built-in. 6242c1f4f12SMasahiro Yamada 6252c1f4f12SMasahiro YamadaKBUILD_MODULES := 6262c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 6272c1f4f12SMasahiro Yamada 6282c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 6292c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 6304b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 6312c1f4f12SMasahiro Yamadaendif 6322c1f4f12SMasahiro Yamada 6332c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 6342c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 6352c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 6362c1f4f12SMasahiro Yamada 637121c2a13SMasahiro Yamadaifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),) 6382c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6392c1f4f12SMasahiro Yamadaendif 6402c1f4f12SMasahiro Yamada 6412c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 6422c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6432c1f4f12SMasahiro Yamadaendif 6442c1f4f12SMasahiro Yamada 6452c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 6462c1f4f12SMasahiro Yamada 6472042b548SMasahiro Yamadaifdef need-config 648d93a18f2SMasahiro Yamadainclude include/config/auto.conf 649d93a18f2SMasahiro Yamadaendif 650d93a18f2SMasahiro Yamada 6511da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 6521da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 65323febe37SMasahiro Yamadacore-y := init/ usr/ 654f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 655d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 65695fb6317SMasahiro Yamadadrivers-y += net/ virt/ 6571da177e4SLinus Torvaldslibs-y := lib/ 6581da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 6591da177e4SLinus Torvalds 660315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 661315bab4eSMasahiro Yamada# command line. 662315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 663315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 664315bab4eSMasahiro Yamadaall: vmlinux 665315bab4eSMasahiro Yamada 666315bab4eSMasahiro YamadaCFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 667315bab4eSMasahiro Yamada $(call cc-option,-fno-tree-loop-im) \ 668315bab4eSMasahiro Yamada $(call cc-disable-warning,maybe-uninitialized,) 6695aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 670315bab4eSMasahiro Yamada 671b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 672b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 673b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 674b1f4ff74SPaulo Zanoniendif 675b1f4ff74SPaulo Zanoni 676669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 677669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 678669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 679669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 680669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 681669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 682669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS 683669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS 684669e06b1SMasahiro Yamada 685315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 686315bab4eSMasahiro Yamada 6872042b548SMasahiro Yamadaifdef need-config 6882042b548SMasahiro Yamadaifdef may-sync-config 689315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 690315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 691315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 692d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 6931da177e4SLinus Torvalds 69405850719SMasahiro Yamada$(KCONFIG_CONFIG): 69505850719SMasahiro Yamada @echo >&2 '***' 69605850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 69705850719SMasahiro Yamada @echo >&2 '***' 69805850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 69905850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 70005850719SMasahiro Yamada @echo >&2 '***' 70105850719SMasahiro Yamada @/bin/false 7021da177e4SLinus Torvalds 70361277981SUlf Magnusson# The actual configuration files used during the build are stored in 70461277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 70561277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 7069390dff6SMasahiro Yamada# 7079390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 7089390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 709f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 7103044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) 711911a91c3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 7122042b548SMasahiro Yamadaelse # !may-sync-config 713d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 714d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 715d7942413SMasahiro Yamada# Use auto.conf to trigger the test 7169ee4e336SSam RavnborgPHONY += include/config/auto.conf 7179ee4e336SSam Ravnborg 7189ee4e336SSam Ravnborginclude/config/auto.conf: 719264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 7205369f550SMichal Marek echo >&2; \ 7215369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 7225369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 7235369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 7245369f550SMichal Marek echo >&2 ; \ 7259ee4e336SSam Ravnborg /bin/false) 7269ee4e336SSam Ravnborg 727d7942413SMasahiro Yamadaendif # may-sync-config 7282042b548SMasahiro Yamadaendif # need-config 7291da177e4SLinus Torvalds 730a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 731ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 732bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 733bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 7346f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 735a1c48bb1SGeert Uytterhoeven 73615f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 737a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 73815f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 73915f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3 74015f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 74115f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 7421da177e4SLinus Torvaldsendif 7431da177e4SLinus Torvalds 74469102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 74569102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 746b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 74769102311SJiri Kosina 748d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov 7496b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins 7506b90bd4bSEmese Revfy 7511873e870SAndi Kleenifdef CONFIG_READABLE_ASM 7521873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 7531873e870SAndi Kleen# reorder blocks reorders the control in the function 7541873e870SAndi Kleen# ipa clone creates specialized cloned functions 7551873e870SAndi Kleen# partial inlining inlines only parts of functions 7561873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 7571873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 7581873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 7591873e870SAndi Kleenendif 7601873e870SAndi Kleen 76108f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 762a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 76335bb5b1eSAndi Kleenendif 76435bb5b1eSAndi Kleen 7652a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 766050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 767050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 7682a61f474SMasahiro Yamada 7692a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 770e06b8b98SSam Ravnborg 771076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 772a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 773a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier 774a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 775cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 776cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names. 777cfe17c9bSMasahiro Yamada# See modpost pattern 2 778a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge 779cfe17c9bSMasahiro Yamadaelse 780cfe17c9bSMasahiro Yamada 781cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build. 782cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 7839df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable 784e2079e93SNathan Chancellor 785e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement. 786e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and 787e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 788e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 789cfe17c9bSMasahiro Yamadaendif 790cfe17c9bSMasahiro Yamada 7910a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 7921da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 793a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 7941da177e4SLinus Torvaldselse 7957e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 7967e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 7977e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 7987e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 7997e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 8007e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 801a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 8021da177e4SLinus Torvaldsendif 8037e9501fdSRabin Vincentendif 8041da177e4SLinus Torvalds 805*f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern. 806*f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN 807709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 808709a972eSKees Cookendif 809709a972eSKees Cook 810*f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value. 811*f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO 812*f0fe00d4Sglider@google.com# Future support for zero initialization is still being debated, see 813*f0fe00d4Sglider@google.com# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being 814*f0fe00d4Sglider@google.com# renamed or dropped. 815*f0fe00d4Sglider@google.comKBUILD_CFLAGS += -ftrivial-auto-var-init=zero 816*f0fe00d4Sglider@google.comKBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 817*f0fe00d4Sglider@google.comendif 818*f0fe00d4Sglider@google.com 8191e88e415SMasahiro YamadaDEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 8202062afb4SLinus Torvalds 8211da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 822866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 8239d937444SMasahiro YamadaDEBUG_CFLAGS += -gsplit-dwarf 824866ced95SAndi Kleenelse 8251e88e415SMasahiro YamadaDEBUG_CFLAGS += -g 826866ced95SAndi Kleenendif 8272288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 8281da177e4SLinus Torvaldsendif 829bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 8309d937444SMasahiro YamadaDEBUG_CFLAGS += -gdwarf-4 831bfaf2dd3SAndi Kleenendif 8321da177e4SLinus Torvalds 833d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 8341e88e415SMasahiro YamadaDEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 835e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 836d6f4ceb7SAndi Kleenendif 837d6f4ceb7SAndi Kleen 83810e68b02SNick Desaulniersifdef CONFIG_DEBUG_INFO_COMPRESSED 83910e68b02SNick DesaulniersDEBUG_CFLAGS += -gz=zlib 84010e68b02SNick DesaulniersKBUILD_AFLAGS += -Wa,--compress-debug-sections=zlib 84110e68b02SNick DesaulniersKBUILD_LDFLAGS += --compress-debug-sections=zlib 84210e68b02SNick Desaulniersendif 84310e68b02SNick Desaulniers 8441e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS) 8451e88e415SMasahiro Yamadaexport DEBUG_CFLAGS 8461e88e415SMasahiro Yamada 847606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 84807d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD 84907d04081SVasily Gorbik # gcc 5 supports generating the mcount tables directly 85007d04081SVasily Gorbik ifeq ($(call cc-option-yn,-mrecord-mcount),y) 85107d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 85207d04081SVasily Gorbik export CC_USING_RECORD_MCOUNT := 1 853a2546faeSSteven Rostedt endif 8542f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 8552f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 8562f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 8572f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 8582f4df001SVasily Gorbik endif 8592f4df001SVasily Gorbik endif 86007d04081SVasily Gorbikendif 861a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 862f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 863f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 864f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 865a2546faeSSteven Rostedt endif 866f28bc3c3SVasily Gorbikendif 867f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 868f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 869f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 87072441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 871cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 87272441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 87372441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 87472441cb1SSteven Rostedt endif 87572441cb1SSteven Rostedtendif 87616444a8aSArnaldo Carvalho de Meloendif 87716444a8aSArnaldo Carvalho de Melo 87891341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 87991341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 88091341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 88191341d4bSSam Ravnborgendif 88291341d4bSSam Ravnborg 88390ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 884e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 885e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 88690ad4052SMasahiro Yamadaendif 88790ad4052SMasahiro Yamada 88843bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH 88943bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 89043bd3a95SMiroslav Benesendif 89143bd3a95SMiroslav Benes 892d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK 893d08b9f0cSSami TolvanenCC_FLAGS_SCS := -fsanitize=shadow-call-stack 894d08b9f0cSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_SCS) 895d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS 896d08b9f0cSSami Tolvanenendif 897d08b9f0cSSami Tolvanen 898e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 899e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 900e8e69931SSam Ravnborg 9011da177e4SLinus Torvalds# warn about C99 declaration after statement 902a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 9031da177e4SLinus Torvalds 9040bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 9058289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 9060bb95f80SKees Cook 907070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 908fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 9091da177e4SLinus Torvalds 910217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 911217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 912217c3e01SStephen Rothwell 9135c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 9145c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) 91544720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) 9165a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 9175c45de21SLinus Torvalds 918adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 919adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 920adc71920SLinus Torvalds 92178a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 92278a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) 92378a5255fSLinus Torvalds 924fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 925a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 926d0115552SLinus Torvalds 92787e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this 92887e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we 92987e0d4f0SDaniel Borkmann# need to disable it here generally. 93087e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 93187e0d4f0SDaniel Borkmann 93287e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine 93387e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled. 93487e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 93587e0d4f0SDaniel Borkmann 9363ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 9373ce120b1SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 9383ce120b1SLinus Torvalds 9398f7f5c9fSAndi Kleen# conserve stack if available 9408f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 9418f7f5c9fSAndi Kleen 942fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 943fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 944fe7c36c7SJosh Triplett 945ea8daa7bSDaniel Wagner# enforce correct pointer usage 946ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 947ea8daa7bSDaniel Wagner 948c834f0e8SKees Cook# Require designated initializers for all marked structures 949c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 950c834f0e8SKees Cook 951a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 952a73619a8SMasahiro YamadaKBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 953a73619a8SMasahiro Yamada 95429be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is 95529be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern 95629be86d7SSeth Forsheeifdef CONFIG_RETPOLINE 95729be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 95829be86d7SSeth Forsheeendif 95929be86d7SSeth Forshee 960a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan 961a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn 962c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan 963dfd402a4SMarco Elverinclude scripts/Makefile.kcsan 964a86fe353SMasahiro Yamada 9658cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 9668cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 9678cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 9688cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 96952bcc330SSam Ravnborg 97089ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id 97189ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id 97218991197SRoland McGrath 9735d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 974d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 9755d7d18f5SDavid Howellsendif 9765d7d18f5SDavid Howells 9775cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 9785cf896fbSPeter CollingbourneLDFLAGS_vmlinux += --pack-dyn-relocs=relr 9795cf896fbSPeter Collingbourneendif 9805cf896fbSPeter Collingbourne 9817f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 9827f3a59dbSMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS)) 9837f3a59dbSMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS)) 9847f3a59dbSMasahiro Yamada 98580591e61SLuc Van Oostenryck# make the checker run with the right architecture 98680591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 98780591e61SLuc Van Oostenryck 98814516765SLuc Van Oostenryck# insure the checker run with the right endianness 98914516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 99014516765SLuc Van Oostenryck 9911f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 9921f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 9931f2f01b1SLuc Van Oostenryck 9941da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 9951da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 9961da177e4SLinus Torvalds# set in the environment 9971da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 9981da177e4SLinus Torvalds# this default value 9991da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds# 10021da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 10031da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 10041da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds# 1007f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1008f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1009f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 1010f4d4ffc0SJason Cooper# 1011f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1012f4d4ffc0SJason Cooper 1013f4d4ffc0SJason Cooper# 10141da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 10151da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 1016070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 10171da177e4SLinus Torvalds# 10181da177e4SLinus Torvalds 1019df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 10201da177e4SLinus Torvaldsexport MODLIB 10211da177e4SLinus Torvalds 1022ac031f26STheodore Ts'o# 10232ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 10242ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 10252ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 1026177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 10272ea03891SSam Ravnborg 1028ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 1029ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 10302ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 1031ac031f26STheodore Ts'oelse 10322ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 1033ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 1034ac031f26STheodore Ts'oelse 10352ea03891SSam Ravnborgmod_strip_cmd = true 1036ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 1037ac031f26STheodore Ts'oexport mod_strip_cmd 1038ac031f26STheodore Ts'o 1039beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 1040beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 1041beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ. 1042beb50df3SBertrand Jacquin 1043beb50df3SBertrand Jacquinmod_compress_cmd = true 1044beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS 1045beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_GZIP 1046e4a42c82SDenis Efremov mod_compress_cmd = $(KGZIP) -n -f 1047beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_GZIP 1048beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_XZ 10498dfb61dcSDenis Efremov mod_compress_cmd = $(XZ) -f 1050beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_XZ 1051beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS 1052beb50df3SBertrand Jacquinexport mod_compress_cmd 1053beb50df3SBertrand Jacquin 1054d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 10553ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY)) 10563ee550f1SDavid Woodhouse 10573ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 1058e2a666d5SRusty Russellelse 1059e2a666d5SRusty Russellmod_sign_cmd = true 1060e2a666d5SRusty Russellendif 1061e2a666d5SRusty Russellexport mod_sign_cmd 1062e2a666d5SRusty Russell 1063056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 1064056d28d1SRolf Eike Beer 10659f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION 10669f0c18aeSJosh Poimboeuf has_libelf := $(call try-run,\ 1067056d28d1SRolf Eike Beer echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 10689f0c18aeSJosh Poimboeuf ifeq ($(has_libelf),1) 10699f0c18aeSJosh Poimboeuf objtool_target := tools/objtool FORCE 10709f0c18aeSJosh Poimboeuf else 10719f0c18aeSJosh Poimboeuf SKIP_STACK_VALIDATION := 1 10729f0c18aeSJosh Poimboeuf export SKIP_STACK_VALIDATION 10739f0c18aeSJosh Poimboeuf endif 10749f0c18aeSJosh Poimboeufendif 10759f0c18aeSJosh Poimboeuf 1076e00d8880SMasahiro YamadaPHONY += prepare0 1077e2a666d5SRusty Russell 1078394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order 1079bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps 108047801c97SMasahiro Yamada 10811da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1082cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 10831da177e4SLinus Torvalds 108423febe37SMasahiro Yamadavmlinux-dirs := $(patsubst %/,%,$(filter %/, \ 10851da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 108695fb6317SMasahiro Yamada $(libs-y) $(libs-m))) 10871da177e4SLinus Torvalds 10881eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 108923febe37SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(core-) \ 109095fb6317SMasahiro Yamada $(drivers-) $(libs-)))) 10911da177e4SLinus Torvalds 1092b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \ 1093b2c88554SMasahiro Yamada $(core-y) $(core-m) $(libs-y) $(libs-m) \ 1094b2c88554SMasahiro Yamada $(drivers-y) $(drivers-m))) 10951da177e4SLinus Torvalds 1096c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 109776cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1098c99f3918SMasahiro Yamada 10991f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1100f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) 1101f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) 1102f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES 1103f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1104f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1105f0d50ca0SMasahiro Yamadaelse 1106f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1107f0d50ca0SMasahiro Yamadaendif 1108f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) 1109f0d50ca0SMasahiro Yamada 1110f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS 111195698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 11121f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 111385f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1114233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 11151da177e4SLinus Torvalds 1116d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 11171da177e4SLinus Torvalds 11183fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 11193fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 11202441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 11211f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 11221f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 11231f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 11241f50b80aSMasahiro YamadaKBUILD_MODULES := 1 1125fb2d99beSMasahiro Yamada 1126fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order 1127fb2d99beSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1128fb2d99beSMasahiro Yamada "$(MAKE) -f $(srctree)/Makefile vmlinux" 11291f50b80aSMasahiro Yamadaendif 11301f50b80aSMasahiro Yamada 113107a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 113207a422bbSMasahiro Yamada 113388694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 113488694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 113588694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 113688694cffSQuentin Perret 113707a422bbSMasahiro Yamada$(autoksyms_h): 113888694cffSQuentin Perret $(call cmd,autoksyms_h) 113923121ca2SNicolas Pitre 1140fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1141fbe6e37dSNicholas Piggin 1142fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1143fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 1144d503ac53SMasahiro Yamada $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1145fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 11462441e78bSNicolas Pitre 11473fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 11481f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 1149741f98feSSam Ravnborg 1150392885eeSMasahiro Yamadatargets := vmlinux 1151392885eeSMasahiro Yamada 11521da177e4SLinus Torvalds# The actual objects are generated when descending, 11531da177e4SLinus Torvalds# make sure no implicit rule kicks in 1154b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ; 11551da177e4SLinus Torvalds 1156ba97df45SMasahiro Yamadafilechk_kernel.release = \ 11570d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 11580d0e7718SMichal Marek 115983a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 116024512795SMasahiro Yamadainclude/config/kernel.release: FORCE 11610d0e7718SMichal Marek $(call filechk,kernel.release) 1162cb58455cSSam Ravnborg 1163d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1164d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1165d8821622SMasahiro Yamada# in parallel 1166d8821622SMasahiro YamadaPHONY += scripts 116760df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1168d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1169cb58455cSSam Ravnborg 11701da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 11715bb78269SSam Ravnborg# or the modules are listed in "prepare". 11725bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 11735bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 11745bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 11751da177e4SLinus Torvalds 1176a5139fb3SMasahiro YamadaPHONY += prepare archprepare 11775bb78269SSam Ravnborg 117836de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 11793044dd05SMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 11803044dd05SMasahiro Yamada include/generated/autoconf.h 11815bb78269SSam Ravnborg 118265bba042SMasahiro Yamadaprepare0: archprepare 118360df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 11848d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 118586feeaa8SSam Ravnborg 11861da177e4SLinus Torvalds# All the preparing.. 1187b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool 1188b9ab5ebbSJosh Poimboeuf 11892c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 11907d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 11917d0e5c20SMasahiro Yamada 11922c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 11932c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1194037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1195037fc336SMasahiro Yamada generic=include/asm-generic 11962c1f4f12SMasahiro Yamadauapi-asm-generic: 1197037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1198037fc336SMasahiro Yamada generic=include/uapi/asm-generic 11992c1f4f12SMasahiro Yamada 1200b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool 12013b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 1202ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1) 1203ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC 1204ef7cfd00SMasahiro Yamada @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1205ef7cfd00SMasahiro Yamada @false 1206ef7cfd00SMasahiro Yamadaelse 1207ef7cfd00SMasahiro Yamada @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1208ef7cfd00SMasahiro Yamadaendif 1209ef7cfd00SMasahiro Yamadaendif 12101da177e4SLinus Torvalds 12111da177e4SLinus Torvalds# Generate some files 12121da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12131da177e4SLinus Torvalds 12141da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 12151da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvaldsuts_len := 64 121863104eecSSam Ravnborgdefine filechk_utsrelease.h 12191da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 12201da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 12211da177e4SLinus Torvalds exit 1; \ 12221da177e4SLinus Torvalds fi; \ 1223ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 12241da177e4SLinus Torvaldsendef 12251da177e4SLinus Torvalds 122663104eecSSam Ravnborgdefine filechk_version.h 1227ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 122878d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1229ad774086SMasahiro Yamada echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 123063104eecSSam Ravnborgendef 123163104eecSSam Ravnborg 123243fee2b2SMasahiro Yamada$(version_h): FORCE 12331da177e4SLinus Torvalds $(call filechk,version.h) 1234223c24a7SMichal Marek $(Q)rm -f $(old_version_h) 12351da177e4SLinus Torvalds 1236273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 123763104eecSSam Ravnborg $(call filechk,utsrelease.h) 123863104eecSSam Ravnborg 1239179efcb4SVegard NossumPHONY += headerdep 1240179efcb4SVegard Nossumheaderdep: 12419663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 12429663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1243179efcb4SVegard Nossum 12441da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12458d730cfbSDavid Woodhouse# Kernel headers 12468d730cfbSDavid Woodhouse 1247e6883b18SSam Ravnborg#Default location for installed headers 1248e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1249e6883b18SSam Ravnborg 125059b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 125159b2bd05SMasahiro Yamada cmd_headers_install = \ 125259b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 125359b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 125459b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 12556d716275SDavid Woodhouse 12568d730cfbSDavid WoodhousePHONY += headers_install 125759b2bd05SMasahiro Yamadaheaders_install: headers 125859b2bd05SMasahiro Yamada $(call cmd,headers_install) 12594f193362SPaul Smith 12601da177e4SLinus TorvaldsPHONY += archheaders archscripts 12611da177e4SLinus Torvalds 1262a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 12631da177e4SLinus Torvalds 126459b2bd05SMasahiro YamadaPHONY += headers 126559b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 12669d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 12672fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1268d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1269d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 12701f85712eSMike Frysinger 12717ecaf069SMasahiro Yamada# Deprecated. It is no-op now. 127268475359SDavid WoodhousePHONY += headers_check 12737ecaf069SMasahiro Yamadaheaders_check: 12747ecaf069SMasahiro Yamada @: 127568475359SDavid Woodhouse 1276e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 127759b2bd05SMasahiro Yamadaprepare: headers 1278e949f4c2SMasahiro Yamadaendif 12791da177e4SLinus Torvalds 1280bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1281bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1282bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1283bdd7714bSMasahiro Yamada 12841da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12855a5da78bSShuah Khan# Kernel selftest 12865a5da78bSShuah Khan 12875a5da78bSShuah KhanPHONY += kselftest 12885a5da78bSShuah Khankselftest: 12892bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 12905a5da78bSShuah Khan 129117eac6c2SShuah Khankselftest-%: FORCE 129217eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1293dcb825a9SWang Long 12943d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 12953d6dee7aSBamvor Jian Zhangkselftest-merge: 12963d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 12976d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 12986d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 12993e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 13003d6dee7aSBamvor Jian Zhang 13015a5da78bSShuah Khan# --------------------------------------------------------------------------- 130237c8a5faSRob Herring# Devicetree files 130337c8a5faSRob Herring 130437c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 130537c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 130637c8a5faSRob Herringendif 130737c8a5faSRob Herring 130837c8a5faSRob Herringifneq ($(dtstree),) 130937c8a5faSRob Herring 1310a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc 131137c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 131237c8a5faSRob Herring 1313c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check 1314b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc 131537c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 131637c8a5faSRob Herring 1317b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1318e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1319b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1320b5154bf6SMasahiro Yamadaendif 1321b5154bf6SMasahiro Yamada 1322b5154bf6SMasahiro Yamadadtbs_check: dtbs 13234f0e3a57SRob Herring 132437c8a5faSRob Herringdtbs_install: 13252431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 132637c8a5faSRob Herring 132737c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 132837c8a5faSRob Herringall: dtbs 132937c8a5faSRob Herringendif 133037c8a5faSRob Herring 133137c8a5faSRob Herringendif 133237c8a5faSRob Herring 133337c8a5faSRob HerringPHONY += scripts_dtc 133437c8a5faSRob Herringscripts_dtc: scripts_basic 133537c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 133637c8a5faSRob Herring 1337e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1338e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1339e10c4321SMasahiro Yamadaendif 1340e10c4321SMasahiro Yamada 1341c473a8d0SMasahiro YamadaPHONY += dt_binding_check 13424f0e3a57SRob Herringdt_binding_check: scripts_dtc 13434f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 13444f0e3a57SRob Herring 134537c8a5faSRob Herring# --------------------------------------------------------------------------- 13461da177e4SLinus Torvalds# Modules 13471da177e4SLinus Torvalds 1348e0b250b5SJonas Zeiger# install modules.builtin regardless of CONFIG_MODULES 1349e0b250b5SJonas ZeigerPHONY += _builtin_inst_ 1350e0b250b5SJonas Zeiger_builtin_inst_: 1351e0b250b5SJonas Zeiger @mkdir -p $(MODLIB)/ 1352e0b250b5SJonas Zeiger @cp -f modules.builtin $(MODLIB)/ 1353e0b250b5SJonas Zeiger @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1354e0b250b5SJonas Zeiger 1355e0b250b5SJonas ZeigerPHONY += install 1356e0b250b5SJonas Zeigerinstall: _builtin_inst_ 1357e0b250b5SJonas Zeiger 13581da177e4SLinus Torvaldsifdef CONFIG_MODULES 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds# By default, build modules as well 13611da177e4SLinus Torvalds 136273d1393eSMichal Marekall: modules 13631da177e4SLinus Torvalds 13644b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider 13654b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to 13664b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them. 13674b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS 13684b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 1 13694b50c8c4SMasahiro Yamadaendif 13704b50c8c4SMasahiro Yamada 13711da177e4SLinus Torvalds# Build modules 1372551559e1STejun Heo# 1373551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1374551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1375551559e1STejun Heo# using awk while concatenating to the final file. 13761da177e4SLinus Torvalds 13774f193362SPaul SmithPHONY += modules 13788451791dSMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check 1379b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 13801da177e4SLinus Torvalds 13818451791dSMasahiro YamadaPHONY += modules_check 13828451791dSMasahiro Yamadamodules_check: modules.order 13838451791dSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 13841da177e4SLinus Torvalds 1385b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ 1386b2c88554SMasahiro Yamada 1387b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE 1388b2c88554SMasahiro Yamada $(call if_changed,modules_order) 1389b2c88554SMasahiro Yamada 1390b2c88554SMasahiro Yamadatargets += modules.order 1391a6c36632SMichal Marek 13921da177e4SLinus Torvalds# Target to prepare building external modules 13934f193362SPaul SmithPHONY += modules_prepare 1394059bc9fcSMasahiro Yamadamodules_prepare: prepare 13951da177e4SLinus Torvalds 13961da177e4SLinus Torvalds# Target to install modules 13974f193362SPaul SmithPHONY += modules_install 13981da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 13991da177e4SLinus Torvalds 14004f193362SPaul SmithPHONY += _modinst_ 1401e0b250b5SJonas Zeiger_modinst_: _builtin_inst_ 14021da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 14031da177e4SLinus Torvalds @rm -f $(MODLIB)/source 14041da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 14058e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 14061da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 14071da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 14087e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 14091da177e4SLinus Torvalds fi 14101bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 1411b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 14121da177e4SLinus Torvalds 141350a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 14141da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 14151da177e4SLinus Torvalds# boot script depmod is the master version. 14164f193362SPaul SmithPHONY += _modinst_post 14176d128e1eSLinus Torvalds_modinst_post: _modinst_ 141850a8ec31SSam Ravnborg $(call cmd,depmod) 14191da177e4SLinus Torvalds 1420d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1421d890f510SJosh BoyerPHONY += modules_sign 1422d890f510SJosh Boyermodules_sign: 1423d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1424d890f510SJosh Boyerendif 1425d890f510SJosh Boyer 14261da177e4SLinus Torvaldselse # CONFIG_MODULES 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds# Modules not configured 14291da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14301da177e4SLinus Torvalds 1431612e47ceSMasahiro YamadaPHONY += modules modules_install 1432612e47ceSMasahiro Yamadamodules modules_install: 14335369f550SMichal Marek @echo >&2 14345369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 14355369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 14365369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 14375369f550SMichal Marek @echo >&2 14381da177e4SLinus Torvalds @exit 1 14391da177e4SLinus Torvalds 14401da177e4SLinus Torvaldsendif # CONFIG_MODULES 14411da177e4SLinus Torvalds 14421da177e4SLinus Torvalds### 14431da177e4SLinus Torvalds# Cleaning is done on three levels. 14441da177e4SLinus Torvalds# make clean Delete most generated files 14451da177e4SLinus Torvalds# Leave enough to build external modules 14461da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 14471da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 14481da177e4SLinus Torvalds 14491da177e4SLinus Torvalds# Directories & files removed with 'make clean' 1450269a535cSMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers \ 14510663c68cSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps 14521da177e4SLinus Torvalds 14531da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 14540663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 145546a63d4bSMasahiro Yamada arch/$(SRCARCH)/include/generated .tmp_objdiff \ 14560663c68cSMasahiro Yamada debian snap tar-install \ 14570663c68cSMasahiro Yamada .config .config.old .version \ 145846457133SMasahiro Yamada Module.symvers \ 1459fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1460fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 146146a63d4bSMasahiro Yamada signing_key.x509.signer vmlinux-gdb.py \ 146246a63d4bSMasahiro Yamada *.spec 14631da177e4SLinus Torvalds 146446457133SMasahiro Yamada# Directories & files removed with 'make distclean' 146546457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 146646457133SMasahiro Yamada 14671da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 14681da177e4SLinus Torvalds# 14691da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 14701da177e4SLinus Torvalds 147176cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 14721da177e4SLinus Torvalds 1473bd1ee804SPawel Mollvmlinuxclean: 1474bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1475fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1476bd1ee804SPawel Moll 1477bd1ee804SPawel Mollclean: archclean vmlinuxclean 14781da177e4SLinus Torvalds 14791da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 14801da177e4SLinus Torvalds# 14811da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1482cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 14831da177e4SLinus Torvalds 1484b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 14851da177e4SLinus Torvalds$(mrproper-dirs): 14861da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 14871da177e4SLinus Torvalds 1488b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 14891da177e4SLinus Torvalds $(call cmd,rmfiles) 14901da177e4SLinus Torvalds 14911da177e4SLinus Torvalds# distclean 14921da177e4SLinus Torvalds# 149346457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 149446457133SMasahiro Yamada 14954f193362SPaul SmithPHONY += distclean 14961da177e4SLinus Torvalds 14971da177e4SLinus Torvaldsdistclean: mrproper 149846457133SMasahiro Yamada $(call cmd,rmfiles) 14991da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 15001da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1501f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1502f78271dfSMasahiro Yamada -o -name 'core' \) \ 15031da177e4SLinus Torvalds -type f -print | xargs rm -f 15041da177e4SLinus Torvalds 15051da177e4SLinus Torvalds 15061da177e4SLinus Torvalds# Packaging of the kernel to various formats 15071da177e4SLinus Torvalds# --------------------------------------------------------------------------- 15081da177e4SLinus Torvalds 1509bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1510000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1511031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1512000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 15131da177e4SLinus Torvalds 15141da177e4SLinus Torvalds# Brief documentation of the typical targets used 15151da177e4SLinus Torvalds# --------------------------------------------------------------------------- 15161da177e4SLinus Torvalds 15175dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1518a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 15195dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 15205dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 15211da177e4SLinus Torvalds 1522fe69b420SMasahiro YamadaPHONY += help 15231da177e4SLinus Torvaldshelp: 15241da177e4SLinus Torvalds @echo 'Cleaning targets:' 15255ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 15265cc8d246SJesper Juhl @echo ' enough build support to build external modules' 15275ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 15285cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 15291da177e4SLinus Torvalds @echo '' 15301da177e4SLinus Torvalds @echo 'Configuration targets:' 15311da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 15321da177e4SLinus Torvalds @echo '' 15331da177e4SLinus Torvalds @echo 'Other generic targets:' 15341da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 15351da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 15361da177e4SLinus Torvalds @echo '* modules - Build all modules' 15379cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 15381da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 153940ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1540433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1541433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 154262718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 154362718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1544155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1545c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 15461da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 15471da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1548f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 15493f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 15503f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 15513f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 15522fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 155359df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 15542fb9b1bdSSam Ravnborg echo '' 155531b8cc80SRandy Dunlap @echo 'Static analysers:' 15561da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 15571da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1558aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1559ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1560295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 156174425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 15627f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 156374425eeeSNicolas Palix @echo '' 1564eb8305aeSMatthias Maennich @echo 'Tools:' 1565eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1566eb8305aeSMatthias Maennich @echo '' 156731b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1568e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 15695a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 15705a5da78bSShuah Khan @echo ' running kselftest on it' 1571e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1572e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1573e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1574dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1575e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1576e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 15775a5da78bSShuah Khan @echo '' 157837c8a5faSRob Herring @$(if $(dtstree), \ 157937c8a5faSRob Herring echo 'Devicetree:'; \ 158037c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 158137c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 15827aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 15837aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 158437c8a5faSRob Herring echo '') 158537c8a5faSRob Herring 158631b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 158731b8cc80SRandy Dunlap @echo ' use "make tools/help"' 158831b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 158931b8cc80SRandy Dunlap @echo '' 15901da177e4SLinus Torvalds @echo 'Kernel packaging:' 1591000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 15921da177e4SLinus Torvalds @echo '' 15931da177e4SLinus Torvalds @echo 'Documentation targets:' 1594cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 15951da177e4SLinus Torvalds @echo '' 159601dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 15971da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 159801dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 15991da177e4SLinus Torvalds @echo '' 16001da177e4SLinus Torvalds @$(if $(boards), \ 16011da177e4SLinus Torvalds $(foreach b, $(boards), \ 16024234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 16031da177e4SLinus Torvalds echo '') 16045dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 16055dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 16065dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 16075dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 16085dffbe81SSegher Boessenkool echo '') 16091da177e4SLinus Torvalds 16101da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 161145d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 16121da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1613a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1614a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1615701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1616af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1617e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 161828bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 161928bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 162028bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1621a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 16221da177e4SLinus Torvalds @echo '' 16231da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 16241da177e4SLinus Torvalds @echo 'For further info see the ./README file' 16251da177e4SLinus Torvalds 16261da177e4SLinus Torvalds 16275dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 16285dffbe81SSegher Boessenkool 16295dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 16305dffbe81SSegher Boessenkool 1631fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 16325dffbe81SSegher Boessenkool 16335dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 16345dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 16355dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 16365dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 16375dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 16385dffbe81SSegher Boessenkool echo '') 16395dffbe81SSegher Boessenkool 16405dffbe81SSegher Boessenkool 16411da177e4SLinus Torvalds# Documentation targets 16421da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1643e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1644e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 164522cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1646bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1647cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 16481da177e4SLinus Torvalds 164967274c08SMasahiro Yamada# Misc 165067274c08SMasahiro Yamada# --------------------------------------------------------------------------- 165167274c08SMasahiro Yamada 165267274c08SMasahiro YamadaPHONY += scripts_gdb 16537a739ce5SMasahiro Yamadascripts_gdb: prepare0 16541e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 16558d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 165667274c08SMasahiro Yamada 165767274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 165867274c08SMasahiro Yamadaall: scripts_gdb 165967274c08SMasahiro Yamadaendif 166067274c08SMasahiro Yamada 16611da177e4SLinus Torvaldselse # KBUILD_EXTMOD 16621da177e4SLinus Torvalds 16631da177e4SLinus Torvalds### 16641da177e4SLinus Torvalds# External module support. 16651da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 16661da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 16671da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 16681da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 16691da177e4SLinus Torvalds# be used. 16701da177e4SLinus Torvalds# 16711da177e4SLinus Torvalds# The following are the only valid targets when building external 16721da177e4SLinus Torvalds# modules. 16731da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 16741da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 16751da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 16761da177e4SLinus Torvalds# make M=dir modules_install 1677070b98bfSSam Ravnborg# Install the modules built in the module directory 16781da177e4SLinus Torvalds# Assumes install directory is already created 16791da177e4SLinus Torvalds 16801da177e4SLinus Torvalds# We are always building modules 16811da177e4SLinus TorvaldsKBUILD_MODULES := 1 16821da177e4SLinus Torvalds 1683c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 1684c99f3918SMasahiro YamadaPHONY += modules 168548a0f727SMasahiro Yamadamodules: descend 1686b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 16871da177e4SLinus Torvalds 16884f193362SPaul SmithPHONY += modules_install 1689a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1690a67dc21aSSam Ravnborg 1691a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 16924f193362SPaul SmithPHONY += _emodinst_ 1693a67dc21aSSam Ravnborg_emodinst_: 1694a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1695b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 16961da177e4SLinus Torvalds 16974f193362SPaul SmithPHONY += _emodinst_post 1698a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1699a67dc21aSSam Ravnborg $(call cmd,depmod) 1700a67dc21aSSam Ravnborg 170176cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 1702bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps 17031da177e4SLinus Torvalds 1704fe69b420SMasahiro YamadaPHONY += help 17051da177e4SLinus Torvaldshelp: 17061da177e4SLinus Torvalds @echo ' Building external modules.' 17071da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 17081da177e4SLinus Torvalds @echo '' 17091da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 17101da177e4SLinus Torvalds @echo ' modules_install - install the module' 17111da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 17121da177e4SLinus Torvalds @echo '' 171306300b21SSam Ravnborg 1714059bc9fcSMasahiro YamadaPHONY += prepare 17151da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 17161da177e4SLinus Torvalds 1717b1fbfcb4SMasahiro Yamada# Single targets 1718b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1719b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1720b1fbfcb4SMasahiro Yamada# 1721b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1722b1fbfcb4SMasahiro Yamada# 1723b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1724b1fbfcb4SMasahiro Yamada# 1725b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1726b1fbfcb4SMasahiro Yamada# 1727b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1728b1fbfcb4SMasahiro Yamada 1729b1fbfcb4SMasahiro Yamadaifdef single-build 1730b1fbfcb4SMasahiro Yamada 1731b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1732b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1733b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1734b1fbfcb4SMasahiro Yamada 1735b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost 1736b1fbfcb4SMasahiro Yamada @: 1737b1fbfcb4SMasahiro Yamada$(single-no-ko): descend 1738b1fbfcb4SMasahiro Yamada @: 1739b1fbfcb4SMasahiro Yamada 1740b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1741b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 1742b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1743b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp 1744b1fbfcb4SMasahiro Yamadaendif 1745b1fbfcb4SMasahiro Yamada 1746b1fbfcb4SMasahiro YamadaPHONY += single_modpost 1747b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko) 1748b1fbfcb4SMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 1749b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1750b1fbfcb4SMasahiro Yamada 1751b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1 1752b1fbfcb4SMasahiro Yamada 1753b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1754b1fbfcb4SMasahiro Yamada 1755b1fbfcb4SMasahiro Yamada# trim unrelated directories 1756b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \ 1757b1fbfcb4SMasahiro Yamada $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1758b1fbfcb4SMasahiro Yamada 1759b1fbfcb4SMasahiro Yamadaendif 1760b1fbfcb4SMasahiro Yamada 1761b480fec9SMasahiro Yamadaifndef CONFIG_MODULES 1762b480fec9SMasahiro YamadaKBUILD_MODULES := 1763b480fec9SMasahiro Yamadaendif 1764b480fec9SMasahiro Yamada 1765c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1766c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1767c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1768c99f3918SMasahiro Yamada# make menuconfig etc. 1769c99f3918SMasahiro Yamada# Error messages still appears in the original language 1770c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 1771c99f3918SMasahiro Yamadadescend: $(build-dirs) 1772c99f3918SMasahiro Yamada$(build-dirs): prepare 1773b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ \ 1774f566e1fbSMasahiro Yamada single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \ 1775b1fbfcb4SMasahiro Yamada need-builtin=1 need-modorder=1 1776c99f3918SMasahiro Yamada 177776cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 177876cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 177976cd306dSMasahiro Yamada$(clean-dirs): 178076cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 178176cd306dSMasahiro Yamada 178288d7be03SMichal Marekclean: $(clean-dirs) 178388d7be03SMichal Marek $(call cmd,rmfiles) 178443f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1785ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 17864f0e3a57SRob Herring -o -name '*.ko.*' \ 17874f0e3a57SRob Herring -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1788ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 1789bbc55bdeSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 179088d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 17919a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 17924fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 179388d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 17948b41fc44SMasahiro Yamada -o -name '.tmp_*.o.*' \ 17956b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1796433db3e2SVinÃcius Tinti -o -name '*.ll' \ 179788d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 179888d7be03SMichal Marek 17991da177e4SLinus Torvalds# Generate tags for editors 18001da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1801a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1802858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 18031da177e4SLinus Torvalds 1804f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 18051da177e4SLinus Torvalds $(call cmd,tags) 18061da177e4SLinus Torvalds 1807eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1808eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1809eb8305aeSMatthias Maennich 1810eb8305aeSMatthias MaennichPHONY += nsdeps 1811bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1812eb8305aeSMatthias Maennichnsdeps: modules 1813bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1814eb8305aeSMatthias Maennich 18151da177e4SLinus Torvalds# Scripts to check various things for consistency 18161da177e4SLinus Torvalds# --------------------------------------------------------------------------- 18171da177e4SLinus Torvalds 1818279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1819279f3dd3SPeter Foley 18201da177e4SLinus Torvaldsincludecheck: 1821436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 18221da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 182380007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 18241da177e4SLinus Torvalds 18251da177e4SLinus Torvaldsversioncheck: 18262ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 18271da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 182880007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 18291da177e4SLinus Torvalds 183074425eeeSNicolas Palixcoccicheck: 1831858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 183274425eeeSNicolas Palix 18331da177e4SLinus Torvaldsnamespacecheck: 18341da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 18351da177e4SLinus Torvalds 1836295ac051SAdrian Bunkexport_report: 1837295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1838295ac051SAdrian Bunk 1839c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1840e3ccf6e3SJeff Dike 1841011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1842011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1843011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1844011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1845011e3a9aSJeff Dikeifeq ($(ARCH), um) 1846011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1847011e3a9aSJeff Dikeelse 1848011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1849011e3a9aSJeff Dikeendif 18501da177e4SLinus Torvaldscheckstack: 18511da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 185275dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 18531da177e4SLinus Torvalds 18547b8ea53dSAmerigo Wangkernelrelease: 18557b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 185601ab1788SAmerigo Wang 1857cb58455cSSam Ravnborgkernelversion: 18582244cbd8SSam Ravnborg @echo $(KERNELVERSION) 18591da177e4SLinus Torvalds 1860c398ff00SMike Marciniszynimage_name: 1861c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1862c398ff00SMike Marciniszyn 1863ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1864f47a23ceSMasahiro Yamada 1865f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_) 1866f47a23ceSMasahiro Yamadatools_silent=s 1867f47a23ceSMasahiro Yamadaendif 1868f47a23ceSMasahiro Yamada 1869ea01fa9fSBorislav Petkovtools/: FORCE 1870bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 187175dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1872ea01fa9fSBorislav Petkov 1873ea01fa9fSBorislav Petkovtools/%: FORCE 1874bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 187575dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1876ea01fa9fSBorislav Petkov 18771da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 18780663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 18791da177e4SLinus Torvalds 1880bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 188150a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1882569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 18835a144a1aSMasahiro Yamada $(KERNELRELEASE) 188450a8ec31SSam Ravnborg 1885392885eeSMasahiro Yamada# read saved command lines for existing targets 1886392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 18871da177e4SLinus Torvalds 1888b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 18891da177e4SLinus Torvalds 189046b7c492SSZ Lin (林上智)endif # config-build 18912042b548SMasahiro Yamadaendif # mixed-build 1892688931a5SMasahiro Yamadaendif # need-sub-make 18931da177e4SLinus Torvalds 18944f193362SPaul SmithPHONY += FORCE 18951da177e4SLinus TorvaldsFORCE: 18964f193362SPaul Smith 1897bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1898fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 18994f193362SPaul Smith.PHONY: $(PHONY) 1900