1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2bfeffd15SLinus TorvaldsVERSION = 5 3f2906aa8SLinus TorvaldsPATCHLEVEL = 19 455922c9dSLinus TorvaldsSUBLEVEL = 0 503c765b0SLinus TorvaldsEXTRAVERSION = -rc4 6754e0b0eSLinus TorvaldsNAME = Superb Owl 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 --%,$(MAKEFLAGS))),) 98066b7ed9SMichal Marek quiet=silent_ 9922149454SMasahiro Yamada KBUILD_VERBOSE = 0 100066b7ed9SMichal Marekendif 101066b7ed9SMichal Marek 102066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 103066b7ed9SMichal Marek 104bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 105bcf637f5SMasahiro Yamada# C compilation. 106bcf637f5SMasahiro Yamada# 107bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 108bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 109bcf637f5SMasahiro Yamada# of whether they are re-compiled or not. 110bcf637f5SMasahiro Yamada# 111bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details, 112bcf637f5SMasahiro Yamada# including where to get the "sparse" utility. 113bcf637f5SMasahiro Yamada 114bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line") 115bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = $(C) 116bcf637f5SMasahiro Yamadaendif 117bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC 118bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = 0 119bcf637f5SMasahiro Yamadaendif 120bcf637f5SMasahiro Yamada 121bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC 122bcf637f5SMasahiro Yamada 123bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 124bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 125bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line") 126bcf637f5SMasahiro Yamada KBUILD_EXTMOD := $(M) 127bcf637f5SMasahiro Yamadaendif 128bcf637f5SMasahiro Yamada 129bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \ 130bcf637f5SMasahiro Yamada $(error building multiple external modules is not supported)) 131bcf637f5SMasahiro Yamada 13274ee585bSMasahiro Yamada# Remove trailing slashes 13374ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),) 13474ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) 13574ee585bSMasahiro Yamadaendif 13674ee585bSMasahiro Yamada 137bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD 138bcf637f5SMasahiro Yamada 13925b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 14025b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 14125b146c5SMasahiro Yamada# 14225b146c5SMasahiro Yamada# For example, you can do this: 14325b146c5SMasahiro Yamada# 14425b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 14525b146c5SMasahiro Yamada# 14625b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 14725b146c5SMasahiro Yamada# two syntaxes to specify it. 14825b146c5SMasahiro Yamada# 1491da177e4SLinus Torvalds# 1) O= 1501da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1511da177e4SLinus Torvalds# 1521da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 15325b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 15425b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1551da177e4SLinus Torvalds# 1561da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1571da177e4SLinus Torvalds# variable. 1581da177e4SLinus Torvalds 15925b146c5SMasahiro Yamada# Do we want to change the working directory? 1601da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1611da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1621da177e4SLinus Torvaldsendif 1631da177e4SLinus Torvalds 16425b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 16525b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 16625b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 16725b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 16825b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 16925b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 17025b146c5SMasahiro Yamada 17125b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 17225b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 17325b146c5SMasahiro Yamadaelse 17425b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 17525b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 17625b146c5SMasahiro Yamada 17725b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 17825b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 17925b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 18025b146c5SMasahiro Yamadaelse 18125b146c5SMasahiro Yamadaneed-sub-make := 1 18251193b76SRobert Jarzmikendif 18351193b76SRobert Jarzmik 18430cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 18530cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile))) 1861da177e4SLinus Torvalds 18725b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 18825b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 18925b146c5SMasahiro Yamadaendif 19025b146c5SMasahiro Yamada 19125b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 19280463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 19380463f1bSMasahiro Yamada# 194d8285639SMasahiro Yamada# --included-dir is added for backward compatibility, but you should not rely on 195d8285639SMasahiro Yamada# it. Please add $(srctree)/ prefix to include Makefiles in the source tree. 19625b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 19725b146c5SMasahiro Yamadaendif 1983812b8c5SMasahiro Yamada 199688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 200688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 201688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 202688931a5SMasahiro Yamadaneed-sub-make := 1 203688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 20493fdddfeSMasahiro Yamada$(this-makefile): ; 205688931a5SMasahiro Yamadaendif 206688931a5SMasahiro Yamada 20725b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 208221cc2d2SMasahiro Yamadaexport sub_make_done := 1 209221cc2d2SMasahiro Yamada 210688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 211688931a5SMasahiro Yamada 212121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 2130b35786dSMilton Miller 214121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 21516f89098SCharles Keepax @: 2160b35786dSMilton Miller 217c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 218121c2a13SMasahiro Yamada__sub-make: 21925b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 2201da177e4SLinus Torvalds 221688931a5SMasahiro Yamadaendif # need-sub-make 222221cc2d2SMasahiro Yamadaendif # sub_make_done 223688931a5SMasahiro Yamada 2241da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 225688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 2261da177e4SLinus Torvalds 2277ff52571SMasahiro Yamada# Do not print "Entering directory ...", 2287ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 2297ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 2307ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 2317ff52571SMasahiro Yamada 23225b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2339da0763bSMichal Marek # building in the source tree 2349da0763bSMichal Marek srctree := . 235051f278eSMasahiro Yamada building_out_of_srctree := 2369da0763bSMichal Marekelse 23725b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2389da0763bSMichal Marek # building in a subdirectory of the source tree 2399da0763bSMichal Marek srctree := .. 2409da0763bSMichal Marek else 24125b146c5SMasahiro Yamada srctree := $(abs_srctree) 2429da0763bSMichal Marek endif 243051f278eSMasahiro Yamada building_out_of_srctree := 1 2449da0763bSMichal Marekendif 2452c1f4f12SMasahiro Yamada 24695fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 24795fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 24895fd3f87SMasahiro Yamadaendif 2492c1f4f12SMasahiro Yamada 2507e1c0477SMichal Marekobjtree := . 2516b12de69SMasahiro YamadaVPATH := $(srctree) 2521da177e4SLinus Torvalds 253051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2541da177e4SLinus Torvalds 2552c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2562c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2572c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2582c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2592c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2602c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2612c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2622c1f4f12SMasahiro Yamada 2632c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2642c1f4f12SMasahiro Yamada 26522340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 26622340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2672c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 26859b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2694623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 2704623980dSDavid Engraf outputmakefile 271805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install 272805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed. 273805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \ 274805b2e1dSMasahiro Yamada headers_install modules_install kernelrelease image_name 275993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ 276993bdde9SMasahiro Yamada image_name 277394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 2782c1f4f12SMasahiro Yamada 2792042b548SMasahiro Yamadaconfig-build := 2802042b548SMasahiro Yamadamixed-build := 2812042b548SMasahiro Yamadaneed-config := 1 282805b2e1dSMasahiro Yamadaneed-compiler := 1 283d7942413SMasahiro Yamadamay-sync-config := 1 284394053f4SMasahiro Yamadasingle-build := 2852c1f4f12SMasahiro Yamada 2862c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2872c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2882042b548SMasahiro Yamada need-config := 2892c1f4f12SMasahiro Yamada endif 2902c1f4f12SMasahiro Yamadaendif 2912c1f4f12SMasahiro Yamada 292805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) 293805b2e1dSMasahiro Yamada ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) 294805b2e1dSMasahiro Yamada need-compiler := 295805b2e1dSMasahiro Yamada endif 296805b2e1dSMasahiro Yamadaendif 297805b2e1dSMasahiro Yamada 298d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 299d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 3002042b548SMasahiro Yamada may-sync-config := 301d7942413SMasahiro Yamada endif 302d7942413SMasahiro Yamadaendif 303d7942413SMasahiro Yamada 304d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 3052042b548SMasahiro Yamada may-sync-config := 306d7942413SMasahiro Yamadaendif 307d7942413SMasahiro Yamada 3082c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 309efbf9726SMasahiro Yamada ifneq ($(filter %config,$(MAKECMDGOALS)),) 3102042b548SMasahiro Yamada config-build := 1 3112c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 3122042b548SMasahiro Yamada mixed-build := 1 3132c1f4f12SMasahiro Yamada endif 3142c1f4f12SMasahiro Yamada endif 3152c1f4f12SMasahiro Yamadaendif 31622340a06SMasahiro Yamada 317394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 318394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 319394053f4SMasahiro Yamada single-build := 1 320394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 321394053f4SMasahiro Yamada mixed-build := 1 322394053f4SMasahiro Yamada endif 323394053f4SMasahiro Yamadaendif 324394053f4SMasahiro Yamada 32522340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 32622340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 32722340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3282042b548SMasahiro Yamada mixed-build := 1 32922340a06SMasahiro Yamada endif 33022340a06SMasahiro Yamadaendif 33122340a06SMasahiro Yamada 3322c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3332c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3342c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3352042b548SMasahiro Yamada mixed-build := 1 3362c1f4f12SMasahiro Yamada endif 3372c1f4f12SMasahiro Yamadaendif 3382c1f4f12SMasahiro Yamada 3392042b548SMasahiro Yamadaifdef mixed-build 3402c1f4f12SMasahiro Yamada# =========================================================================== 3412c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3422c1f4f12SMasahiro Yamada# Handle them one by one. 3432c1f4f12SMasahiro Yamada 3442c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3452c1f4f12SMasahiro Yamada 346121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 3472c1f4f12SMasahiro Yamada @: 3482c1f4f12SMasahiro Yamada 3492c1f4f12SMasahiro Yamada__build_one_by_one: 3502c1f4f12SMasahiro Yamada $(Q)set -e; \ 3512c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3522c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3532c1f4f12SMasahiro Yamada done 3542c1f4f12SMasahiro Yamada 3552042b548SMasahiro Yamadaelse # !mixed-build 3562c1f4f12SMasahiro Yamada 3573204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include 3582c1f4f12SMasahiro Yamada 3592c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3602c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 3612c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3622c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3632c1f4f12SMasahiro Yamada 3643204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3671da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3681da177e4SLinus Torvalds# 3691da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3701da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3711da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3721da177e4SLinus Torvalds# make ARCH=ia64 3731da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3741da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3771da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3781da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3791da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3801da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3811da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3821da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3831da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3842331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds# Architecture as present in compile.h 3871da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3886752ed90SThomas GleixnerSRCARCH := $(ARCH) 3891da177e4SLinus Torvalds 390d746d647SSam Ravnborg# Additional ARCH settings for x86 391d746d647SSam Ravnborgifeq ($(ARCH),i386) 392d746d647SSam Ravnborg SRCARCH := x86 393d746d647SSam Ravnborgendif 394d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 395d746d647SSam Ravnborg SRCARCH := x86 396d746d647SSam Ravnborgendif 39774b469f2SSam Ravnborg 3985e538790SSam Ravnborg# Additional ARCH settings for sparc 399e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 400e69f58c0SNamhyung Kim SRCARCH := sparc 401e69f58c0SNamhyung Kimendif 402a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 4035e538790SSam Ravnborg SRCARCH := sparc 404a439fe51SSam Ravnborgendif 4052fb9b1bdSSam Ravnborg 4065f6e0fe0SMasahiro Yamada# Additional ARCH settings for parisc 4075f6e0fe0SMasahiro Yamadaifeq ($(ARCH),parisc64) 4085f6e0fe0SMasahiro Yamada SRCARCH := parisc 4095f6e0fe0SMasahiro Yamadaendif 4105f6e0fe0SMasahiro Yamada 411f02aa48dSMasahiro Yamadaexport cross_compiling := 412f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH)) 413f02aa48dSMasahiro Yamadacross_compiling := 1 414f02aa48dSMasahiro Yamadaendif 415f02aa48dSMasahiro Yamada 41614cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 41741263fc6SBen Gardinerexport KCONFIG_CONFIG 41814cdd3c4SRoman Zippel 4191da177e4SLinus Torvalds# SHELL used by kbuild 420858805b3SMasahiro YamadaCONFIG_SHELL := sh 4211da177e4SLinus Torvalds 4226d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4236d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4246d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 425d7f14c66SUwe Kleine-König 426a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 427e9c28192SNathan Chancellorifneq ($(filter %/,$(LLVM)),) 428e9c28192SNathan ChancellorLLVM_PREFIX := $(LLVM) 429e9c28192SNathan Chancellorelse ifneq ($(filter -%,$(LLVM)),) 430e9c28192SNathan ChancellorLLVM_SUFFIX := $(LLVM) 431e9c28192SNathan Chancellorendif 432e9c28192SNathan Chancellor 433e9c28192SNathan ChancellorHOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 434e9c28192SNathan ChancellorHOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 435a0d1c951SMasahiro Yamadaelse 4361da177e4SLinus TorvaldsHOSTCC = gcc 4371da177e4SLinus TorvaldsHOSTCXX = g++ 438a0d1c951SMasahiro Yamadaendif 439d5ea4fecSChun-Tse ShaoHOSTPKG_CONFIG = pkg-config 4407f3a59dbSMasahiro Yamada 441f67695c9SElliot BermanKBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 4421e240781SArnd Bergmann -O2 -fomit-frame-pointer -std=gnu11 \ 4434d94f910SMark Rutland -Wdeclaration-after-statement 444f67695c9SElliot BermanKBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) 445f67695c9SElliot BermanKBUILD_USERLDFLAGS := $(USERLDFLAGS) 4467f3a59dbSMasahiro Yamada 447f67695c9SElliot BermanKBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 448735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 449f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 450f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds# Make variables (CC, etc...) 4531da177e4SLinus TorvaldsCPP = $(CC) -E 454a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 455e9c28192SNathan ChancellorCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 456e9c28192SNathan ChancellorLD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 457e9c28192SNathan ChancellorAR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 458e9c28192SNathan ChancellorNM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 459e9c28192SNathan ChancellorOBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 460e9c28192SNathan ChancellorOBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 461e9c28192SNathan ChancellorREADELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 462e9c28192SNathan ChancellorSTRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 463a0d1c951SMasahiro Yamadaelse 464a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 465a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 4661da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4671da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4681da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4691da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 470eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 471a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 472a0d1c951SMasahiro Yamadaendif 473e83b9f55SAndrii NakryikoPAHOLE = pahole 474c9a0f3b8SJiri OlsaRESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 47573a4f6dbSMasahiro YamadaLEX = flex 47673a4f6dbSMasahiro YamadaYACC = bison 4771da177e4SLinus TorvaldsAWK = awk 478caa27b66SSam RavnborgINSTALLKERNEL := installkernel 479436e980eSDominique MartinetDEPMOD = depmod 4801da177e4SLinus TorvaldsPERL = perl 481e9781b52SMasahiro YamadaPYTHON3 = python3 4821da177e4SLinus TorvaldsCHECK = sparse 483858805b3SMasahiro YamadaBASH = bash 484e4a42c82SDenis EfremovKGZIP = gzip 485e4a42c82SDenis EfremovKBZIP2 = bzip2 486e4a42c82SDenis EfremovKLZOP = lzop 4878dfb61dcSDenis EfremovLZMA = lzma 4888dfb61dcSDenis EfremovLZ4 = lz4c 4898dfb61dcSDenis EfremovXZ = xz 49048f7ddf7SNick TerrellZSTD = zstd 4918dfb61dcSDenis Efremov 4929741e07eSJiri OlsaPAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) 4939741e07eSJiri Olsa 49480a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 4956c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 4960c22be07SDouglas AndersonNOSTDINC_FLAGS := 4976588169dSSam RavnborgCFLAGS_MODULE = 4986588169dSSam RavnborgAFLAGS_MODULE = 4996588169dSSam RavnborgLDFLAGS_MODULE = 5001da177e4SLinus TorvaldsCFLAGS_KERNEL = 5011da177e4SLinus TorvaldsAFLAGS_KERNEL = 502b36fad65SMichal MarekLDFLAGS_vmlinux = 5031da177e4SLinus Torvalds 504abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 505abbf1590SDavid HowellsUSERINCLUDE := \ 5069d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 5079d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 508abbf1590SDavid Howells -I$(srctree)/include/uapi \ 5093308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 510ce6ed1c4SMasahiro Yamada -include $(srctree)/include/linux/compiler-version.h \ 511abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 512abbf1590SDavid Howells 5131da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 5141da177e4SLinus Torvalds# Needed to be compatible with the O= option 515abbf1590SDavid HowellsLINUXINCLUDE := \ 5169d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 5179d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 518051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 519f8224f7fSMasahiro Yamada -I$(objtree)/include \ 520f8224f7fSMasahiro Yamada $(USERINCLUDE) 5211da177e4SLinus Torvalds 52242a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 523eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 52442a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 525b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 526172aad81SOlaf Hering -Werror=return-type -Wno-format-security \ 527e8c07082SArnd Bergmann -std=gnu11 528433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 52980c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 53080c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 5316588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 5326588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 53310df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 534d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 5355241ab4cSMasahiro YamadaCLANG_FLAGS := 5361da177e4SLinus Torvalds 537d5ea4fecSChun-Tse Shaoexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 538d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 539d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 54048f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 5417bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 542f67695c9SElliot Bermanexport KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 5431da177e4SLinus Torvalds 544d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 5450e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 546222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 5476588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 54880c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 5499741e07eSJiri Olsaexport PAHOLE_FLAGS 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds# Files to ignore in find ... statements 5521da177e4SLinus Torvalds 553ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 554ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 555ae63b2d7SPrarit Bhargava -prune -o 556450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 557450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds# =========================================================================== 5601da177e4SLinus Torvalds# Rules shared between *config targets and build targets 5611da177e4SLinus Torvalds 562312a3d09SCao jin# Basic helpers built in scripts/basic/ 5634f193362SPaul SmithPHONY += scripts_basic 5641da177e4SLinus Torvaldsscripts_basic: 5651da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 5661da177e4SLinus Torvalds 5674f193362SPaul SmithPHONY += outputmakefile 5682728fcfaSMasahiro Yamadaifdef building_out_of_srctree 569e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 570fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 571fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 572fd5f0cd6SJan Beulich# output directory. 5733a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 5743a51ff34SVladimir Kondratiev# ignore whole output directory 5752728fcfaSMasahiro Yamada 5762728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN Makefile 5772728fcfaSMasahiro Yamada cmd_makefile = { \ 5782728fcfaSMasahiro Yamada echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ 5792728fcfaSMasahiro Yamada echo "include $(srctree)/Makefile"; \ 5802728fcfaSMasahiro Yamada } > Makefile 5812728fcfaSMasahiro Yamada 5821da177e4SLinus Torvaldsoutputmakefile: 583e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 584e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 585e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 586e8e83a23SMasahiro Yamada echo >&2 "***"; \ 587e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 588e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 589e8e83a23SMasahiro Yamada echo >&2 "***"; \ 590e8e83a23SMasahiro Yamada false; \ 591e8e83a23SMasahiro Yamada fi 59292979997SAndi Kleen $(Q)ln -fsn $(srctree) source 5932728fcfaSMasahiro Yamada $(call cmd,makefile) 594156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 595156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 596fd5f0cd6SJan Beulichendif 5971da177e4SLinus Torvalds 598db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 599db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 600db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 601db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade. 6026072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 603db07562aSNick Desaulniers 604db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 6056f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang 606ae6b289aSChris Friesendif 607ae6b289aSChris Fries 60857fd251cSMasahiro Yamada# Include this also for config targets because some architectures need 60957fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE. 610805b2e1dSMasahiro Yamadaifdef need-compiler 61157fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler 612805b2e1dSMasahiro Yamadaendif 61357fd251cSMasahiro Yamada 6142042b548SMasahiro Yamadaifdef config-build 6151da177e4SLinus Torvalds# =========================================================================== 6161da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 6171da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 6181da177e4SLinus Torvalds 6191da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 6201da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 6211da177e4SLinus Torvalds# used for 'make defconfig' 6223204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 623315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 6241da177e4SLinus Torvalds 62536de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 62631110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 62731110ebbSSam Ravnborg 62836de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 6291da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 6301da177e4SLinus Torvalds 6312042b548SMasahiro Yamadaelse #!config-build 6321da177e4SLinus Torvalds# =========================================================================== 6331da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 6341da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 6351da177e4SLinus Torvalds 6362c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 637121c2a13SMasahiro Yamada# but instead __all depend on modules 6382c1f4f12SMasahiro YamadaPHONY += all 6392c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 640121c2a13SMasahiro Yamada__all: all 6412c1f4f12SMasahiro Yamadaelse 642121c2a13SMasahiro Yamada__all: modules 6432c1f4f12SMasahiro Yamadaendif 6442c1f4f12SMasahiro Yamada 6452c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 6462c1f4f12SMasahiro Yamada# Normally, just do built-in. 6472c1f4f12SMasahiro Yamada 6482c1f4f12SMasahiro YamadaKBUILD_MODULES := 6492c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 6502c1f4f12SMasahiro Yamada 6512c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 6522c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 6534b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 6542c1f4f12SMasahiro Yamadaendif 6552c1f4f12SMasahiro Yamada 6562c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 6572c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 6582c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 6592c1f4f12SMasahiro Yamada 6606ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) 6612c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6622c1f4f12SMasahiro Yamadaendif 6632c1f4f12SMasahiro Yamada 6642c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 6652c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6662c1f4f12SMasahiro Yamadaendif 6672c1f4f12SMasahiro Yamada 6682c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 6692c1f4f12SMasahiro Yamada 6702042b548SMasahiro Yamadaifdef need-config 671d93a18f2SMasahiro Yamadainclude include/config/auto.conf 672d93a18f2SMasahiro Yamadaendif 673d93a18f2SMasahiro Yamada 6741da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 6751da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 676d92cc4d5SMasahiro Yamadacore-y := init/ usr/ arch/$(SRCARCH)/ 677f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 678d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 6798b5f4eb3SMasahiro Yamadadrivers-$(CONFIG_NET) += net/ 6808b5f4eb3SMasahiro Yamadadrivers-y += virt/ 6811da177e4SLinus Torvaldslibs-y := lib/ 6821da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 6831da177e4SLinus Torvalds 684315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 685315bab4eSMasahiro Yamada# command line. 686315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 687315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 688315bab4eSMasahiro Yamadaall: vmlinux 689315bab4eSMasahiro Yamada 6907d73c3e9SNick DesaulniersCFLAGS_GCOV := -fprofile-arcs -ftest-coverage 6917d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 6927d73c3e9SNick DesaulniersCFLAGS_GCOV += -fno-tree-loop-im 6937d73c3e9SNick Desaulniersendif 6945aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 695315bab4eSMasahiro Yamada 696b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 697b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 698b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 699b1f4ff74SPaulo Zanoniendif 700b1f4ff74SPaulo Zanoni 7013204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 702315bab4eSMasahiro Yamada 7032042b548SMasahiro Yamadaifdef need-config 7042042b548SMasahiro Yamadaifdef may-sync-config 705315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 706315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 707315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 708d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 7091da177e4SLinus Torvalds 71005850719SMasahiro Yamada$(KCONFIG_CONFIG): 71105850719SMasahiro Yamada @echo >&2 '***' 71205850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 71305850719SMasahiro Yamada @echo >&2 '***' 71405850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 71505850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 71605850719SMasahiro Yamada @echo >&2 '***' 71705850719SMasahiro Yamada @/bin/false 7181da177e4SLinus Torvalds 71961277981SUlf Magnusson# The actual configuration files used during the build are stored in 72061277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 72161277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 7229390dff6SMasahiro Yamada# 7239390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 7249390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 725f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 726d952cfafSMasahiro Yamada# 727d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 728d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input. 7293044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) 730d952cfafSMasahiro Yamada $(Q)$(kecho) " SYNC $@" 731d952cfafSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 7322042b548SMasahiro Yamadaelse # !may-sync-config 733d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 734d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 735d7942413SMasahiro Yamada# Use auto.conf to trigger the test 7369ee4e336SSam RavnborgPHONY += include/config/auto.conf 7379ee4e336SSam Ravnborg 7389ee4e336SSam Ravnborginclude/config/auto.conf: 739264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 7405369f550SMichal Marek echo >&2; \ 7415369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 7425369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 7435369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 7445369f550SMichal Marek echo >&2 ; \ 7459ee4e336SSam Ravnborg /bin/false) 7469ee4e336SSam Ravnborg 747d7942413SMasahiro Yamadaendif # may-sync-config 7482042b548SMasahiro Yamadaendif # need-config 7491da177e4SLinus Torvalds 7507d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-delete-null-pointer-checks 751ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 752bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 753bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 7546f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 755a1c48bb1SGeert Uytterhoeven 75615f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 757a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 75815f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 75915f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3 76015f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 76115f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 7621da177e4SLinus Torvaldsendif 7631da177e4SLinus Torvalds 76469102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 7657d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 7667d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to 7677d73c3e9SNick Desaulniers# -fno-allow-store-data-races. 76869102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 769b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 7707d73c3e9SNick Desaulniersendif 77169102311SJiri Kosina 7721873e870SAndi Kleenifdef CONFIG_READABLE_ASM 7731873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 7741873e870SAndi Kleen# reorder blocks reorders the control in the function 7751873e870SAndi Kleen# ipa clone creates specialized cloned functions 7761873e870SAndi Kleen# partial inlining inlines only parts of functions 7777d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 7781873e870SAndi Kleenendif 7791873e870SAndi Kleen 78008f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 781a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 78235bb5b1eSAndi Kleenendif 78335bb5b1eSAndi Kleen 784893ab004SMasahiro Yamadastackp-flags-y := -fno-stack-protector 785050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 786050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 7872a61f474SMasahiro Yamada 7882a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 789e06b8b98SSam Ravnborg 7903fe617ccSLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror 791f0be87c4SLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds 792e92e2634SMasahiro YamadaKBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) 7933fe617ccSLinus Torvalds 794076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 795a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 796e8c07082SArnd Bergmann# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. 797a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 798d936eb23SLinus Torvaldselse 799d936eb23SLinus Torvalds 80049832c81SRandy Dunlap# gcc inanely warns about local variables called 'main' 80149832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main 802cfe17c9bSMasahiro Yamadaendif 803cfe17c9bSMasahiro Yamada 804885480b0SNathan Chancellor# These warnings generated too much noise in a regular build. 805885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 806885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 8070a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 8086272cc38SNathan Chancellor 80949beadbdSLinus Torvalds# These result in bogus false positives 81049beadbdSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) 81149beadbdSLinus Torvalds 8121da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 813a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 8141da177e4SLinus Torvaldselse 8157e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 8167e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 8177e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 8187e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 8197e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 8207e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 821a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 8221da177e4SLinus Torvaldsendif 8237e9501fdSRabin Vincentendif 8241da177e4SLinus Torvalds 825f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern. 826f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN 827709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 828709a972eSKees Cookendif 829709a972eSKees Cook 830f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value. 831f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO 832f0fe00d4Sglider@google.comKBUILD_CFLAGS += -ftrivial-auto-var-init=zero 833f02003c8SKees Cookifdef CONFIG_CC_IS_CLANG 834f02003c8SKees Cook# https://bugs.llvm.org/show_bug.cgi?id=45497 835f0fe00d4Sglider@google.comKBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 836f0fe00d4Sglider@google.comendif 837f02003c8SKees Cookendif 838f0fe00d4Sglider@google.com 83939218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes 84039218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers. 84139218ff4SKees CookKBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 84239218ff4SKees Cook 843a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 844a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS 845a82adfd5SKees CookKBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 846a82adfd5SKees Cookendif 847a82adfd5SKees Cook 848606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 8493b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC 85007d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 8512f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 8522f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 8532f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 8542f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 8552f4df001SVasily Gorbik endif 8562f4df001SVasily Gorbik endif 85707d04081SVasily Gorbikendif 85822c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 85922c8542dSSami Tolvanen CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 86022c8542dSSami Tolvanenendif 8613b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 8623b15cdc1SSami Tolvanen ifdef CONFIG_HAVE_C_RECORDMCOUNT 8633b15cdc1SSami Tolvanen BUILD_C_RECORDMCOUNT := y 8643b15cdc1SSami Tolvanen export BUILD_C_RECORDMCOUNT 8653b15cdc1SSami Tolvanen endif 8663b15cdc1SSami Tolvanenendif 867a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 8687d73c3e9SNick Desaulniers # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 869f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 870f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 871f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 872a2546faeSSteven Rostedt endif 873f28bc3c3SVasily Gorbikendif 874f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 875f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 876f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 87716444a8aSArnaldo Carvalho de Meloendif 87816444a8aSArnaldo Carvalho de Melo 87991341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 88091341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 8817d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-inline-functions-called-once 88291341d4bSSam Ravnborgendif 88391341d4bSSam Ravnborg 88490ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 885e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 886e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 88790ad4052SMasahiro Yamadaendif 88890ad4052SMasahiro Yamada 889d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK 890d08b9f0cSSami TolvanenCC_FLAGS_SCS := -fsanitize=shadow-call-stack 891d08b9f0cSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_SCS) 892d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS 893d08b9f0cSSami Tolvanenendif 894d08b9f0cSSami Tolvanen 895dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG 896dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN 8972b868952SAlexander LobakinCC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 8987f69180bSMasahiro YamadaKBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache 899dc5723b0SSami Tolvanenelse 9002b868952SAlexander LobakinCC_FLAGS_LTO := -flto 901dc5723b0SSami Tolvanenendif 902dc5723b0SSami TolvanenCC_FLAGS_LTO += -fvisibility=hidden 90322d429e7SSami Tolvanen 90422d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size 90522d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5 90624845dcbSNick Desaulniers 9070236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion 9080236526dSTor Vic# when using lld < 13.0.0. 90924845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0) 9100236526dSTor Vicifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0) 91124845dcbSNick DesaulniersKBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) 91224845dcbSNick Desaulniersendif 913dc5723b0SSami Tolvanenendif 9140236526dSTor Vicendif 915dc5723b0SSami Tolvanen 916dc5723b0SSami Tolvanenifdef CONFIG_LTO 9175e95325fSSami TolvanenKBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 9185e95325fSSami TolvanenKBUILD_AFLAGS += -fno-lto 919dc5723b0SSami Tolvanenexport CC_FLAGS_LTO 920dc5723b0SSami Tolvanenendif 921dc5723b0SSami Tolvanen 922cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG 923cf68fffbSSami TolvanenCC_FLAGS_CFI := -fsanitize=cfi \ 924cf68fffbSSami Tolvanen -fsanitize-cfi-cross-dso \ 925cf68fffbSSami Tolvanen -fno-sanitize-cfi-canonical-jump-tables \ 926cf68fffbSSami Tolvanen -fno-sanitize-trap=cfi \ 927cf68fffbSSami Tolvanen -fno-sanitize-blacklist 928cf68fffbSSami Tolvanen 929cf68fffbSSami Tolvanenifdef CONFIG_CFI_PERMISSIVE 930cf68fffbSSami TolvanenCC_FLAGS_CFI += -fsanitize-recover=cfi 931cf68fffbSSami Tolvanenendif 932cf68fffbSSami Tolvanen 933cf68fffbSSami Tolvanen# If LTO flags are filtered out, we must also filter out CFI. 934cf68fffbSSami TolvanenCC_FLAGS_LTO += $(CC_FLAGS_CFI) 935cf68fffbSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_CFI) 936cf68fffbSSami Tolvanenexport CC_FLAGS_CFI 937cf68fffbSSami Tolvanenendif 938cf68fffbSSami Tolvanen 939cf536e18SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B 940cf536e18SFeng TangKBUILD_CFLAGS += -falign-functions=64 94109c60546SFeng Tangendif 94209c60546SFeng Tang 943e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 94404e85bbfSAlexey DobriyanNOSTDINC_FLAGS += -nostdinc 945e8e69931SSam Ravnborg 9461da177e4SLinus Torvalds# warn about C99 declaration after statement 947a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 9481da177e4SLinus Torvalds 9490bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 9508289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 9510bb95f80SKees Cook 952070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 953fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 9541da177e4SLinus Torvalds 955552a23a0SGustavo A. R. Silva# In order to make sure new function cast mismatches are not introduced 956552a23a0SGustavo A. R. Silva# in the kernel (to avoid tripping CFI checking), the kernel should be 957552a23a0SGustavo A. R. Silva# globally built with -Wcast-function-type. 958552a23a0SGustavo A. R. SilvaKBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) 959552a23a0SGustavo A. R. Silva 960217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 961217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 962217c3e01SStephen Rothwell 9635c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 9645a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 9655c45de21SLinus Torvalds 966adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 967adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 968adc71920SLinus Torvalds 96978a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 9707d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 9717d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized 9727d73c3e9SNick Desaulniersendif 97378a5255fSLinus Torvalds 97486cffecdSKees Cookifdef CONFIG_CC_IS_GCC 97586cffecdSKees Cook# The allocators already balk at large sizes, so silence the compiler 97686cffecdSKees Cook# warnings for bounds checks involving those possible values. While 97786cffecdSKees Cook# -Wno-alloc-size-larger-than would normally be used here, earlier versions 97886cffecdSKees Cook# of gcc (<9.1) weirdly don't handle the option correctly when _other_ 97986cffecdSKees Cook# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX 98086cffecdSKees Cook# doesn't work (as it is documented to), silently resolving to "0" prior to 98186cffecdSKees Cook# version 9.1 (and producing an error more recently). Numeric values larger 98286cffecdSKees Cook# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently 98386cffecdSKees Cook# ignored, continuing to default to PTRDIFF_MAX. So, left with no other 98486cffecdSKees Cook# choice, we must perform a versioned check to disable this warning. 98586cffecdSKees Cook# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au 98686cffecdSKees CookKBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than) 98786cffecdSKees Cookendif 98886cffecdSKees Cook 989fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 9908b42cf2fSMasahiro YamadaKBUILD_CFLAGS += -fno-strict-overflow 991d0115552SLinus Torvalds 9923ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 9937d4eb0d8SMasahiro YamadaKBUILD_CFLAGS += -fno-stack-check 9943ce120b1SLinus Torvalds 9958f7f5c9fSAndi Kleen# conserve stack if available 9967d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 9977d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fconserve-stack 9987d73c3e9SNick Desaulniersendif 9998f7f5c9fSAndi Kleen 1000fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 100187de84c9SMasahiro YamadaKBUILD_CFLAGS += -Werror=date-time 1002fe7c36c7SJosh Triplett 1003ea8daa7bSDaniel Wagner# enforce correct pointer usage 1004ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 1005ea8daa7bSDaniel Wagner 1006c834f0e8SKees Cook# Require designated initializers for all marked structures 1007c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 1008c834f0e8SKees Cook 1009a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 1010a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 1011a73619a8SMasahiro Yamada 1012e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed 1013e0fe0bbeSMasahiro Yamadainclude-y := scripts/Makefile.extrawarn 10146947fd96SMasahiro Yamadainclude-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1015e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN) += scripts/Makefile.kasan 1016e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1017e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1018e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV) += scripts/Makefile.kcov 1019613f4b3eSKees Cookinclude-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1020e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1021e0fe0bbeSMasahiro Yamada 1022e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y)) 1023a86fe353SMasahiro Yamada 1024132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last. 1025132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel 1026132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point. 1027bf5438fcSJason Baron 10288cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 10298cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 10308cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 10318cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 103252bcc330SSam Ravnborg 1033a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1 1034a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1 103518991197SRoland McGrath 10365d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1037d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 10385d7d18f5SDavid Howellsendif 10395d7d18f5SDavid Howells 10405cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 104127f2a4dbSNick DesaulniersLDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags 10425cf896fbSPeter Collingbourneendif 10435cf896fbSPeter Collingbourne 104459612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the 104559612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script. 104659612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN 104759612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn 104859612b24SNathan Chancellorendif 104959612b24SNathan Chancellor 10507f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 10517f58b487SMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 10527f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 10537f3a59dbSMasahiro Yamada 105480591e61SLuc Van Oostenryck# make the checker run with the right architecture 105580591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 105680591e61SLuc Van Oostenryck 105714516765SLuc Van Oostenryck# insure the checker run with the right endianness 105814516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 105914516765SLuc Van Oostenryck 10601f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 10611f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 10621f2f01b1SLuc Van Oostenryck 10631da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 10641da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 10651da177e4SLinus Torvalds# set in the environment 10661da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 10671da177e4SLinus Torvalds# this default value 10681da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds# 10711da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 10721da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 10731da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds# 1076f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1077f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1078f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 1079f4d4ffc0SJason Cooper# 1080f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1081f4d4ffc0SJason Cooper 1082f4d4ffc0SJason Cooper# 10831da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 10841da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 1085070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 10861da177e4SLinus Torvalds# 10871da177e4SLinus Torvalds 1088df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 10891da177e4SLinus Torvaldsexport MODLIB 10901da177e4SLinus Torvalds 1091e00d8880SMasahiro YamadaPHONY += prepare0 1092e2a666d5SRusty Russell 1093ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 10947f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order 10957f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps 109647801c97SMasahiro Yamada 10971da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 10984c928904SMasahiro Yamadacore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ 10994c928904SMasahiro Yamadacore-$(CONFIG_BLOCK) += block/ 11001da177e4SLinus Torvalds 110123febe37SMasahiro Yamadavmlinux-dirs := $(patsubst %/,%,$(filter %/, \ 11021da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 110395fb6317SMasahiro Yamada $(libs-y) $(libs-m))) 11041da177e4SLinus Torvalds 11051eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 110623febe37SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(core-) \ 110795fb6317SMasahiro Yamada $(drivers-) $(libs-)))) 11081da177e4SLinus Torvalds 1109b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \ 1110b2c88554SMasahiro Yamada $(core-y) $(core-m) $(libs-y) $(libs-m) \ 1111b2c88554SMasahiro Yamada $(drivers-y) $(drivers-m))) 11121da177e4SLinus Torvalds 1113c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 111476cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1115c99f3918SMasahiro Yamada 11161f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1117f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) 1118f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) 1119f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES 1120f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1121f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1122f0d50ca0SMasahiro Yamadaelse 1123f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1124f0d50ca0SMasahiro Yamadaendif 1125f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) 1126f0d50ca0SMasahiro Yamada 1127f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS 112895698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 112985f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1130233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 11311da177e4SLinus Torvalds 1132d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 11331da177e4SLinus Torvalds 11343fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 11353fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 11362441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 11371f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 11381f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 11391f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 11401f50b80aSMasahiro YamadaKBUILD_MODULES := 1 1141fb2d99beSMasahiro Yamada 1142fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order 1143fb2d99beSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 114453632ba8SMasahiro Yamada "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive" 11451f50b80aSMasahiro Yamadaendif 11461f50b80aSMasahiro Yamada 114707a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 114807a422bbSMasahiro Yamada 114988694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 115088694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 115188694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 115288694cffSQuentin Perret 115307a422bbSMasahiro Yamada$(autoksyms_h): 115488694cffSQuentin Perret $(call cmd,autoksyms_h) 115523121ca2SNicolas Pitre 1156fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1157fbe6e37dSNicholas Piggin 1158fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1159fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 11603ec8a5b3SMasahiro Yamada $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ 1161fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 11622441e78bSNicolas Pitre 11633fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 11640b956e20SRasmus Villemoes +$(call if_changed_dep,link-vmlinux) 1165741f98feSSam Ravnborg 1166392885eeSMasahiro Yamadatargets := vmlinux 1167392885eeSMasahiro Yamada 11681da177e4SLinus Torvalds# The actual objects are generated when descending, 11691da177e4SLinus Torvalds# make sure no implicit rule kicks in 1170b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ; 11711da177e4SLinus Torvalds 1172ba97df45SMasahiro Yamadafilechk_kernel.release = \ 11730d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 11740d0e7718SMichal Marek 117583a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 117624512795SMasahiro Yamadainclude/config/kernel.release: FORCE 11770d0e7718SMichal Marek $(call filechk,kernel.release) 1178cb58455cSSam Ravnborg 1179d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1180d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1181d8821622SMasahiro Yamada# in parallel 1182d8821622SMasahiro YamadaPHONY += scripts 118360df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1184d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1185cb58455cSSam Ravnborg 11861da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 11875bb78269SSam Ravnborg# or the modules are listed in "prepare". 11885bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 11895bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 11905bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 11911da177e4SLinus Torvalds 1192a5139fb3SMasahiro YamadaPHONY += prepare archprepare 11935bb78269SSam Ravnborg 119436de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 11953044dd05SMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 11961476fee5SMasahiro Yamada include/generated/autoconf.h remove-stale-files 11975bb78269SSam Ravnborg 119865bba042SMasahiro Yamadaprepare0: archprepare 119960df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 12008d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 120186feeaa8SSam Ravnborg 12021da177e4SLinus Torvalds# All the preparing.. 12030d989ac2SMasahiro Yamadaprepare: prepare0 1204b9ab5ebbSJosh Poimboeuf 12051476fee5SMasahiro YamadaPHONY += remove-stale-files 12061476fee5SMasahiro Yamadaremove-stale-files: 12071476fee5SMasahiro Yamada $(Q)$(srctree)/scripts/remove-stale-files 12081476fee5SMasahiro Yamada 12092c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 12107d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 12117d0e5c20SMasahiro Yamada 12122c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 12132c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1214037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1215037fc336SMasahiro Yamada generic=include/asm-generic 12162c1f4f12SMasahiro Yamadauapi-asm-generic: 1217037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1218037fc336SMasahiro Yamada generic=include/uapi/asm-generic 12192c1f4f12SMasahiro Yamada 12201da177e4SLinus Torvalds# Generate some files 12211da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12221da177e4SLinus Torvalds 12231da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 12241da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 12251da177e4SLinus Torvalds 12261da177e4SLinus Torvaldsuts_len := 64 122763104eecSSam Ravnborgdefine filechk_utsrelease.h 12281da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 12291da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 12301da177e4SLinus Torvalds exit 1; \ 12311da177e4SLinus Torvalds fi; \ 1232ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 12331da177e4SLinus Torvaldsendef 12341da177e4SLinus Torvalds 123563104eecSSam Ravnborgdefine filechk_version.h 12369b82f13eSSasha Levin if [ $(SUBLEVEL) -gt 255 ]; then \ 1237ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 1238207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 12399b82f13eSSasha Levin else \ 12409b82f13eSSasha Levin echo \#define LINUX_VERSION_CODE $(shell \ 1241207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 12429b82f13eSSasha Levin fi; \ 12439b82f13eSSasha Levin echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 124488a68672SSasha Levin ((c) > 255 ? 255 : (c)))'; \ 124588a68672SSasha Levin echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 124688a68672SSasha Levin echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 124788a68672SSasha Levin echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 124863104eecSSam Ravnborgendef 124963104eecSSam Ravnborg 12505c816641SMasahiro Yamada$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) 12515c816641SMasahiro Yamada$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) 125243fee2b2SMasahiro Yamada$(version_h): FORCE 12531da177e4SLinus Torvalds $(call filechk,version.h) 12541da177e4SLinus Torvalds 1255273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 125663104eecSSam Ravnborg $(call filechk,utsrelease.h) 125763104eecSSam Ravnborg 1258179efcb4SVegard NossumPHONY += headerdep 1259179efcb4SVegard Nossumheaderdep: 12609663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 12619663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1262179efcb4SVegard Nossum 12631da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12648d730cfbSDavid Woodhouse# Kernel headers 12658d730cfbSDavid Woodhouse 1266e6883b18SSam Ravnborg#Default location for installed headers 1267e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1268e6883b18SSam Ravnborg 126959b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 127059b2bd05SMasahiro Yamada cmd_headers_install = \ 127159b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 127259b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 127359b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 12746d716275SDavid Woodhouse 12758d730cfbSDavid WoodhousePHONY += headers_install 127659b2bd05SMasahiro Yamadaheaders_install: headers 127759b2bd05SMasahiro Yamada $(call cmd,headers_install) 12784f193362SPaul Smith 12791da177e4SLinus TorvaldsPHONY += archheaders archscripts 12801da177e4SLinus Torvalds 1281a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 12821da177e4SLinus Torvalds 128359b2bd05SMasahiro YamadaPHONY += headers 128459b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 12859d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 12862fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1287d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1288d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 12891f85712eSMike Frysinger 1290e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 129159b2bd05SMasahiro Yamadaprepare: headers 1292e949f4c2SMasahiro Yamadaendif 129368475359SDavid Woodhouse 1294bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1295bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1296bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1297bdd7714bSMasahiro Yamada 12988d730cfbSDavid Woodhouse# --------------------------------------------------------------------------- 129914ccc638SMasahiro Yamada# Install 130014ccc638SMasahiro Yamada 130114ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel. 130275ef3122SRandy Dunlap# If DKMS is installed, 'make install' will eventually recurse back 130375ef3122SRandy Dunlap# to this Makefile to build and install external modules. 130414ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 130514ccc638SMasahiro Yamada 1306f774f5bbSMasahiro Yamadaquiet_cmd_install = INSTALL $(INSTALL_PATH) 1307f774f5bbSMasahiro Yamada cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 130814ccc638SMasahiro Yamada 130914ccc638SMasahiro Yamada# --------------------------------------------------------------------------- 13101bb0b18aSMasahiro Yamada# Tools 13111bb0b18aSMasahiro Yamada 131203f16cd0SJosh Poimboeufifdef CONFIG_OBJTOOL 13130d989ac2SMasahiro Yamadaprepare: tools/objtool 13140d989ac2SMasahiro Yamadaendif 13150d989ac2SMasahiro Yamada 13160d989ac2SMasahiro Yamadaifdef CONFIG_BPF 13170d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF 13180d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids 13190d989ac2SMasahiro Yamadaendif 13200d989ac2SMasahiro Yamadaendif 13210d989ac2SMasahiro Yamada 13220d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean 13230d989ac2SMasahiro Yamada 13240d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 13250d989ac2SMasahiro Yamada 13260d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist 13270d989ac2SMasahiro Yamada# in output directory, skip its clean in that case 13280d989ac2SMasahiro Yamadaresolve_btfids_clean: 13290d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),) 13300d989ac2SMasahiro Yamada $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 13310d989ac2SMasahiro Yamadaendif 13320d989ac2SMasahiro Yamada 13331bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake 13341bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_) 13351bb0b18aSMasahiro Yamadatools_silent=s 13361bb0b18aSMasahiro Yamadaendif 13371bb0b18aSMasahiro Yamada 13381bb0b18aSMasahiro Yamadatools/: FORCE 13391bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 13401bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 13411bb0b18aSMasahiro Yamada 13421bb0b18aSMasahiro Yamadatools/%: FORCE 13431bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 13441bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 13451bb0b18aSMasahiro Yamada 13461bb0b18aSMasahiro Yamada# --------------------------------------------------------------------------- 13475a5da78bSShuah Khan# Kernel selftest 13485a5da78bSShuah Khan 13495a5da78bSShuah KhanPHONY += kselftest 1350*4062eba9SGuillaume Tuckerkselftest: headers 13512bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 13525a5da78bSShuah Khan 1353*4062eba9SGuillaume Tuckerkselftest-%: headers FORCE 135417eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1355dcb825a9SWang Long 13563d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 13573d6dee7aSBamvor Jian Zhangkselftest-merge: 13583d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 13596d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 13606d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 13613e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 13623d6dee7aSBamvor Jian Zhang 13635a5da78bSShuah Khan# --------------------------------------------------------------------------- 136437c8a5faSRob Herring# Devicetree files 136537c8a5faSRob Herring 136637c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 136737c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 136837c8a5faSRob Herringendif 136937c8a5faSRob Herring 137037c8a5faSRob Herringifneq ($(dtstree),) 137137c8a5faSRob Herring 137275e89534SRob Herring%.dtb: include/config/kernel.release scripts_dtc 137375e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 137437c8a5faSRob Herring 137575e89534SRob Herring%.dtbo: include/config/kernel.release scripts_dtc 137675e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1377ce88c9c7SViresh Kumar 1378c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check 1379b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc 138037c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 138137c8a5faSRob Herring 138275e89534SRob Herringifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1383e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1384b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1385b5154bf6SMasahiro Yamadaendif 1386b5154bf6SMasahiro Yamada 1387b5154bf6SMasahiro Yamadadtbs_check: dtbs 13884f0e3a57SRob Herring 138937c8a5faSRob Herringdtbs_install: 13902431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 139137c8a5faSRob Herring 139237c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 139337c8a5faSRob Herringall: dtbs 139437c8a5faSRob Herringendif 139537c8a5faSRob Herring 139637c8a5faSRob Herringendif 139737c8a5faSRob Herring 139837c8a5faSRob HerringPHONY += scripts_dtc 139937c8a5faSRob Herringscripts_dtc: scripts_basic 140037c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 140137c8a5faSRob Herring 1402e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1403e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1404e10c4321SMasahiro Yamadaendif 1405e10c4321SMasahiro Yamada 1406c473a8d0SMasahiro YamadaPHONY += dt_binding_check 14074f0e3a57SRob Herringdt_binding_check: scripts_dtc 14084f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 14094f0e3a57SRob Herring 141037c8a5faSRob Herring# --------------------------------------------------------------------------- 14111da177e4SLinus Torvalds# Modules 14121da177e4SLinus Torvalds 14131da177e4SLinus Torvaldsifdef CONFIG_MODULES 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds# By default, build modules as well 14161da177e4SLinus Torvalds 141773d1393eSMichal Marekall: modules 14181da177e4SLinus Torvalds 14194b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider 14204b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to 14214b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them. 14224b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS 14234b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 1 14244b50c8c4SMasahiro Yamadaendif 14254b50c8c4SMasahiro Yamada 14261da177e4SLinus Torvalds# Build modules 1427551559e1STejun Heo# 1428551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1429551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1430551559e1STejun Heo# using awk while concatenating to the final file. 14311da177e4SLinus Torvalds 14324f193362SPaul SmithPHONY += modules 1433596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare 14341da177e4SLinus Torvalds 1435b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ 1436b2c88554SMasahiro Yamada 1437b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE 1438b2c88554SMasahiro Yamada $(call if_changed,modules_order) 1439b2c88554SMasahiro Yamada 1440b2c88554SMasahiro Yamadatargets += modules.order 1441a6c36632SMichal Marek 14421da177e4SLinus Torvalds# Target to prepare building external modules 14434f193362SPaul SmithPHONY += modules_prepare 1444059bc9fcSMasahiro Yamadamodules_prepare: prepare 1445596b0474SMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/module.lds 14461da177e4SLinus Torvalds 1447961ab4a3SMasahiro Yamadaexport modules_sign_only := 14481da177e4SLinus Torvalds 1449961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y) 1450961ab4a3SMasahiro YamadaPHONY += modules_sign 1451961ab4a3SMasahiro Yamadamodules_sign: modules_install 1452961ab4a3SMasahiro Yamada @: 1453961ab4a3SMasahiro Yamada 1454961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install. 1455961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 1456961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),) 1457961ab4a3SMasahiro Yamadamodules_sign_only := y 1458961ab4a3SMasahiro Yamadaendif 1459961ab4a3SMasahiro Yamadaendif 1460961ab4a3SMasahiro Yamada 1461961ab4a3SMasahiro Yamadamodinst_pre := 1462961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),) 1463961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre 1464961ab4a3SMasahiro Yamadaendif 1465961ab4a3SMasahiro Yamada 1466961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre) 14673e3005dfSMasahiro YamadaPHONY += __modinst_pre 14683e3005dfSMasahiro Yamada__modinst_pre: 14691da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 14701da177e4SLinus Torvalds @rm -f $(MODLIB)/source 14711da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 14728e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 14731da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 14741da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 14757e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 14761da177e4SLinus Torvalds fi 14771bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 14782c6d9636SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 14792c6d9636SMasahiro Yamada @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 14801da177e4SLinus Torvalds 14811da177e4SLinus Torvaldsendif # CONFIG_MODULES 14821da177e4SLinus Torvalds 14831da177e4SLinus Torvalds### 14841da177e4SLinus Torvalds# Cleaning is done on three levels. 14851da177e4SLinus Torvalds# make clean Delete most generated files 14861da177e4SLinus Torvalds# Leave enough to build external modules 14871da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 14881da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 14891da177e4SLinus Torvalds 14901da177e4SLinus Torvalds# Directories & files removed with 'make clean' 149169bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ 14923d32285fSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps \ 14934c7858b9SMasahiro Yamada compile_commands.json .thinlto-cache 14941da177e4SLinus Torvalds 14951da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 14960663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 1497b0d6207bSMasahiro Yamada arch/$(SRCARCH)/include/generated .objdiff \ 14980663c68cSMasahiro Yamada debian snap tar-install \ 14990663c68cSMasahiro Yamada .config .config.old .version \ 150046457133SMasahiro Yamada Module.symvers \ 15015cca3606SMasahiro Yamada certs/signing_key.pem \ 1502b31f2a49SNayna Jain certs/x509.genkey \ 1503b31f2a49SNayna Jain vmlinux-gdb.py \ 150446a63d4bSMasahiro Yamada *.spec 15051da177e4SLinus Torvalds 15061da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 15071da177e4SLinus Torvalds# 15081da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 15091da177e4SLinus Torvalds 151076cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 15111da177e4SLinus Torvalds 1512bd1ee804SPawel Mollvmlinuxclean: 1513bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1514fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1515bd1ee804SPawel Moll 151650d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean 15171da177e4SLinus Torvalds 15181da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 15191da177e4SLinus Torvalds# 15201da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1521cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 15221da177e4SLinus Torvalds 1523b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 15241da177e4SLinus Torvalds$(mrproper-dirs): 15251da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 15261da177e4SLinus Torvalds 1527b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 15281da177e4SLinus Torvalds $(call cmd,rmfiles) 15291da177e4SLinus Torvalds 15301da177e4SLinus Torvalds# distclean 15311da177e4SLinus Torvalds# 15324f193362SPaul SmithPHONY += distclean 15331da177e4SLinus Torvalds 15341da177e4SLinus Torvaldsdistclean: mrproper 153519c8d912SMasahiro Yamada @find . $(RCS_FIND_IGNORE) \ 15361da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1537f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 15387a02cec5SMasahiro Yamada -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 15397a02cec5SMasahiro Yamada -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 15401da177e4SLinus Torvalds -type f -print | xargs rm -f 15411da177e4SLinus Torvalds 15421da177e4SLinus Torvalds 15431da177e4SLinus Torvalds# Packaging of the kernel to various formats 15441da177e4SLinus Torvalds# --------------------------------------------------------------------------- 15451da177e4SLinus Torvalds 1546bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1547000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1548031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1549000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 15501da177e4SLinus Torvalds 15511da177e4SLinus Torvalds# Brief documentation of the typical targets used 15521da177e4SLinus Torvalds# --------------------------------------------------------------------------- 15531da177e4SLinus Torvalds 15545dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1555a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 15565dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 15575dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 15581da177e4SLinus Torvalds 1559fe69b420SMasahiro YamadaPHONY += help 15601da177e4SLinus Torvaldshelp: 15611da177e4SLinus Torvalds @echo 'Cleaning targets:' 15625ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 15635cc8d246SJesper Juhl @echo ' enough build support to build external modules' 15645ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 15655cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 15661da177e4SLinus Torvalds @echo '' 15671da177e4SLinus Torvalds @echo 'Configuration targets:' 15681da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 15691da177e4SLinus Torvalds @echo '' 15701da177e4SLinus Torvalds @echo 'Other generic targets:' 15711da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 15721da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 15731da177e4SLinus Torvalds @echo '* modules - Build all modules' 15749cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 15751da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 157640ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1577433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1578433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 157962718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 158062718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1581155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1582c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 15831da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 15841da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1585f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 15863f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 15873f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 15883f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 15892fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 159059df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 15912fb9b1bdSSam Ravnborg echo '' 159231b8cc80SRandy Dunlap @echo 'Static analysers:' 15931da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1594aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1595ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1596295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 159774425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 15987f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 15996ad7cbc0SNathan Huckleberry @echo ' clang-analyzer - Check with clang static analyzer' 16006ad7cbc0SNathan Huckleberry @echo ' clang-tidy - Check with clang-tidy' 160174425eeeSNicolas Palix @echo '' 1602eb8305aeSMatthias Maennich @echo 'Tools:' 1603eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1604eb8305aeSMatthias Maennich @echo '' 160531b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1606e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 16075a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 16085a5da78bSShuah Khan @echo ' running kselftest on it' 1609e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1610e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1611e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1612dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1613e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1614e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 16155a5da78bSShuah Khan @echo '' 161637c8a5faSRob Herring @$(if $(dtstree), \ 161737c8a5faSRob Herring echo 'Devicetree:'; \ 161837c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 161937c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 16207aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 16217aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 162237c8a5faSRob Herring echo '') 162337c8a5faSRob Herring 162431b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 162531b8cc80SRandy Dunlap @echo ' use "make tools/help"' 162631b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 162731b8cc80SRandy Dunlap @echo '' 16281da177e4SLinus Torvalds @echo 'Kernel packaging:' 1629000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 16301da177e4SLinus Torvalds @echo '' 16311da177e4SLinus Torvalds @echo 'Documentation targets:' 1632cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 16331da177e4SLinus Torvalds @echo '' 163401dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 16355c816641SMasahiro Yamada @$(or $(archhelp),\ 163601dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 16371da177e4SLinus Torvalds @echo '' 16381da177e4SLinus Torvalds @$(if $(boards), \ 16391da177e4SLinus Torvalds $(foreach b, $(boards), \ 16404234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 16411da177e4SLinus Torvalds echo '') 16425dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 16435dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 16445dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 16455dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 16465dffbe81SSegher Boessenkool echo '') 16471da177e4SLinus Torvalds 16481da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 164945d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 16501da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1651a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1652a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1653701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1654af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1655e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 165628bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 165728bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 165828bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1659c77d06e7SYann Droneaud @echo ' e: warnings are being treated as errors' 1660a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 16611da177e4SLinus Torvalds @echo '' 16621da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 16631da177e4SLinus Torvalds @echo 'For further info see the ./README file' 16641da177e4SLinus Torvalds 16651da177e4SLinus Torvalds 16665dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 16675dffbe81SSegher Boessenkool 16685dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 16695dffbe81SSegher Boessenkool 1670fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 16715dffbe81SSegher Boessenkool 16725dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 16735dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 16745dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 16755dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 16765dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 16775dffbe81SSegher Boessenkool echo '') 16785dffbe81SSegher Boessenkool 16795dffbe81SSegher Boessenkool 16801da177e4SLinus Torvalds# Documentation targets 16811da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1682e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1683e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 168422cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1685bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1686cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 16871da177e4SLinus Torvalds 168867274c08SMasahiro Yamada# Misc 168967274c08SMasahiro Yamada# --------------------------------------------------------------------------- 169067274c08SMasahiro Yamada 169167274c08SMasahiro YamadaPHONY += scripts_gdb 16927a739ce5SMasahiro Yamadascripts_gdb: prepare0 16931e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 16948d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 169567274c08SMasahiro Yamada 169667274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 169767274c08SMasahiro Yamadaall: scripts_gdb 169867274c08SMasahiro Yamadaendif 169967274c08SMasahiro Yamada 17001da177e4SLinus Torvaldselse # KBUILD_EXTMOD 17011da177e4SLinus Torvalds 17021da177e4SLinus Torvalds### 17031da177e4SLinus Torvalds# External module support. 17041da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 17051da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 17061da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 170711122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used. 17081da177e4SLinus Torvalds 17096212804fSMasahiro Yamada# We are always building only modules. 17106212804fSMasahiro YamadaKBUILD_BUILTIN := 17111da177e4SLinus TorvaldsKBUILD_MODULES := 1 17121da177e4SLinus Torvalds 1713c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 17143d32285fSMasahiro Yamada$(MODORDER): descend 17153d32285fSMasahiro Yamada @: 17163d32285fSMasahiro Yamada 17177f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json 17183d32285fSMasahiro YamadaPHONY += compile_commands.json 17193d32285fSMasahiro Yamada 172076cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 17213d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ 1722dc5723b0SSami Tolvanen $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache 17231da177e4SLinus Torvalds 17246072b2c4SMasahiro YamadaPHONY += prepare 17256072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations 17266072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 17276072b2c4SMasahiro Yamadaprepare: 1728129ab0d2SMasahiro Yamada @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 17296072b2c4SMasahiro Yamada echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1730129ab0d2SMasahiro Yamada echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 17316072b2c4SMasahiro Yamada echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 17326072b2c4SMasahiro Yamada fi 17336072b2c4SMasahiro Yamada 1734fe69b420SMasahiro YamadaPHONY += help 17351da177e4SLinus Torvaldshelp: 17361da177e4SLinus Torvalds @echo ' Building external modules.' 17371da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 17381da177e4SLinus Torvalds @echo '' 17391da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 17401da177e4SLinus Torvalds @echo ' modules_install - install the module' 17411da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 17421da177e4SLinus Torvalds @echo '' 174306300b21SSam Ravnborg 1744596b0474SMasahiro Yamada# no-op for external module builds 17456072b2c4SMasahiro YamadaPHONY += modules_prepare 1746596b0474SMasahiro Yamada 17471da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 17481da177e4SLinus Torvalds 17493e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 17503e3005dfSMasahiro Yamada# Modules 17513e3005dfSMasahiro Yamada 17523e3005dfSMasahiro YamadaPHONY += modules modules_install 17533e3005dfSMasahiro Yamada 17543e3005dfSMasahiro Yamadaifdef CONFIG_MODULES 17553e3005dfSMasahiro Yamada 17561a998be6SMasahiro Yamadamodules: modules_check 17573e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 17583e3005dfSMasahiro Yamada 17591a998be6SMasahiro YamadaPHONY += modules_check 17601a998be6SMasahiro Yamadamodules_check: $(MODORDER) 17611a998be6SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 17621a998be6SMasahiro Yamada 17633ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD $(MODLIB) 17643e3005dfSMasahiro Yamada cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 17653e3005dfSMasahiro Yamada $(KERNELRELEASE) 17663e3005dfSMasahiro Yamada 17673e3005dfSMasahiro Yamadamodules_install: 17683e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 17693e3005dfSMasahiro Yamada $(call cmd,depmod) 17703e3005dfSMasahiro Yamada 17713e3005dfSMasahiro Yamadaelse # CONFIG_MODULES 17723e3005dfSMasahiro Yamada 17733e3005dfSMasahiro Yamada# Modules not configured 17743e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 17753e3005dfSMasahiro Yamada 17763e3005dfSMasahiro Yamadamodules modules_install: 17773e3005dfSMasahiro Yamada @echo >&2 '***' 17783e3005dfSMasahiro Yamada @echo >&2 '*** The present kernel configuration has modules disabled.' 17793e3005dfSMasahiro Yamada @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' 17803e3005dfSMasahiro Yamada @echo >&2 '*** to enable CONFIG_MODULES.' 17813e3005dfSMasahiro Yamada @echo >&2 '***' 17823e3005dfSMasahiro Yamada @exit 1 17833e3005dfSMasahiro Yamada 17843e3005dfSMasahiro Yamadaendif # CONFIG_MODULES 17853e3005dfSMasahiro Yamada 1786b1fbfcb4SMasahiro Yamada# Single targets 1787b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1788b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1789b1fbfcb4SMasahiro Yamada# 1790b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1791b1fbfcb4SMasahiro Yamada# 1792b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1793b1fbfcb4SMasahiro Yamada# 1794b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1795b1fbfcb4SMasahiro Yamada# 1796b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1797b1fbfcb4SMasahiro Yamada 1798b1fbfcb4SMasahiro Yamadaifdef single-build 1799b1fbfcb4SMasahiro Yamada 1800b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1801b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1802fc93a4cdSMasahiro Yamadasingle-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 1803fc93a4cdSMasahiro Yamada $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 1804b1fbfcb4SMasahiro Yamada 1805b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost 1806b1fbfcb4SMasahiro Yamada @: 1807b1fbfcb4SMasahiro Yamada$(single-no-ko): descend 1808b1fbfcb4SMasahiro Yamada @: 1809b1fbfcb4SMasahiro Yamada 1810b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1811b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 1812b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1813b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp 1814b1fbfcb4SMasahiro Yamadaendif 1815b1fbfcb4SMasahiro Yamada 1816b1fbfcb4SMasahiro YamadaPHONY += single_modpost 1817596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare 18187f69180bSMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER) 1819b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1820b1fbfcb4SMasahiro Yamada 1821b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1 1822b1fbfcb4SMasahiro Yamada 18237f69180bSMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko)) 1824b1fbfcb4SMasahiro Yamada 1825b1fbfcb4SMasahiro Yamada# trim unrelated directories 1826b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \ 1827b1fbfcb4SMasahiro Yamada $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1828b1fbfcb4SMasahiro Yamada 1829b1fbfcb4SMasahiro Yamadaendif 1830b1fbfcb4SMasahiro Yamada 1831b480fec9SMasahiro Yamadaifndef CONFIG_MODULES 1832b480fec9SMasahiro YamadaKBUILD_MODULES := 1833b480fec9SMasahiro Yamadaendif 1834b480fec9SMasahiro Yamada 1835c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1836c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1837c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1838c99f3918SMasahiro Yamada# make menuconfig etc. 1839c99f3918SMasahiro Yamada# Error messages still appears in the original language 1840c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 1841c99f3918SMasahiro Yamadadescend: $(build-dirs) 1842c99f3918SMasahiro Yamada$(build-dirs): prepare 1843b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ \ 184420b1be59SMasahiro Yamada single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ 1845b1fbfcb4SMasahiro Yamada need-builtin=1 need-modorder=1 1846c99f3918SMasahiro Yamada 184776cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 184876cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 184976cd306dSMasahiro Yamada$(clean-dirs): 185076cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 185176cd306dSMasahiro Yamada 185288d7be03SMichal Marekclean: $(clean-dirs) 185388d7be03SMichal Marek $(call cmd,rmfiles) 18545c816641SMasahiro Yamada @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1855ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 18564f0e3a57SRob Herring -o -name '*.ko.*' \ 1857ce88c9c7SViresh Kumar -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1858ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 18599413e764SMasahiro Yamada -o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \ 186088d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 18619a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 18624fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 186388d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 1864b0d6207bSMasahiro Yamada -o -name '.tmp_*' \ 18656b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1866433db3e2SVinÃcius Tinti -o -name '*.ll' \ 186738e89184SSami Tolvanen -o -name '*.gcno' \ 186838e89184SSami Tolvanen -o -name '*.*.symversions' \) -type f -print | xargs rm -f 186988d7be03SMichal Marek 18701da177e4SLinus Torvalds# Generate tags for editors 18711da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1872a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1873858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 18741da177e4SLinus Torvalds 1875f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 18761da177e4SLinus Torvalds $(call cmd,tags) 18771da177e4SLinus Torvalds 1878eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1879eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1880eb8305aeSMatthias Maennich 1881eb8305aeSMatthias MaennichPHONY += nsdeps 1882bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1883eb8305aeSMatthias Maennichnsdeps: modules 1884bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1885eb8305aeSMatthias Maennich 18863d32285fSMasahiro Yamada# Clang Tooling 18873d32285fSMasahiro Yamada# --------------------------------------------------------------------------- 18883d32285fSMasahiro Yamada 18893d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN $@ 18903d32285fSMasahiro Yamada cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 18913d32285fSMasahiro Yamada 18927f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ 18933d32285fSMasahiro Yamada $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ 18943d32285fSMasahiro Yamada $(if $(CONFIG_MODULES), $(MODORDER)) FORCE 18953d32285fSMasahiro Yamada $(call if_changed,gen_compile_commands) 18963d32285fSMasahiro Yamada 18977f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json 18983d32285fSMasahiro Yamada 18996ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer 19006ad7cbc0SNathan Huckleberry 19016ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG 19026ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK $< 19036ad7cbc0SNathan Huckleberry cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 19046ad7cbc0SNathan Huckleberry 19057f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json 19066ad7cbc0SNathan Huckleberry $(call cmd,clang_tools) 19076ad7cbc0SNathan Huckleberryelse 19086ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer: 19096ad7cbc0SNathan Huckleberry @echo "$@ requires CC=clang" >&2 19106ad7cbc0SNathan Huckleberry @false 19116ad7cbc0SNathan Huckleberryendif 19126ad7cbc0SNathan Huckleberry 19131da177e4SLinus Torvalds# Scripts to check various things for consistency 19141da177e4SLinus Torvalds# --------------------------------------------------------------------------- 19151da177e4SLinus Torvalds 19167dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report 1917279f3dd3SPeter Foley 19181da177e4SLinus Torvaldsincludecheck: 1919436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 19201da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 192180007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 19221da177e4SLinus Torvalds 19231da177e4SLinus Torvaldsversioncheck: 19242ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 19251da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 192680007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 19271da177e4SLinus Torvalds 192874425eeeSNicolas Palixcoccicheck: 1929858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 193074425eeeSNicolas Palix 1931295ac051SAdrian Bunkexport_report: 1932295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1933295ac051SAdrian Bunk 1934c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1935e3ccf6e3SJeff Dike 1936011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1937011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1938011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1939011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1940011e3a9aSJeff Dikeifeq ($(ARCH), um) 1941011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1942011e3a9aSJeff Dikeelse 1943011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1944011e3a9aSJeff Dikeendif 19451da177e4SLinus Torvaldscheckstack: 19461da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 194775dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 19481da177e4SLinus Torvalds 19497b8ea53dSAmerigo Wangkernelrelease: 19507b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 195101ab1788SAmerigo Wang 1952cb58455cSSam Ravnborgkernelversion: 19532244cbd8SSam Ravnborg @echo $(KERNELVERSION) 19541da177e4SLinus Torvalds 1955c398ff00SMike Marciniszynimage_name: 1956c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1957c398ff00SMike Marciniszyn 19581da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 19590663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 19601da177e4SLinus Torvalds 1961392885eeSMasahiro Yamada# read saved command lines for existing targets 1962392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 19631da177e4SLinus Torvalds 1964b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 19651da177e4SLinus Torvalds 196646b7c492SSZ Lin (林上智)endif # config-build 19672042b548SMasahiro Yamadaendif # mixed-build 1968688931a5SMasahiro Yamadaendif # need-sub-make 19691da177e4SLinus Torvalds 19704f193362SPaul SmithPHONY += FORCE 19711da177e4SLinus TorvaldsFORCE: 19724f193362SPaul Smith 1973bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1974fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 19754f193362SPaul Smith.PHONY: $(PHONY) 1976