1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2568035b0SLinus TorvaldsVERSION = 6 3ac9a7868SLinus TorvaldsPATCHLEVEL = 4 455922c9dSLinus TorvaldsSUBLEVEL = 0 5f1fcbaa1SLinus TorvaldsEXTRAVERSION = -rc2 6568035b0SLinus TorvaldsNAME = Hurr durr I'ma ninja sloth 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 1487d599fcSMasahiro Yamadaifeq ($(filter undefine,$(.FEATURES)),) 1587d599fcSMasahiro Yamada$(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION)) 1687d599fcSMasahiro Yamadaendif 1787d599fcSMasahiro Yamada 18121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \ 19121c2a13SMasahiro Yamada $(error targets prefixed with '__' are only for internal use)) 20121c2a13SMasahiro Yamada 21ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 22121c2a13SMasahiro YamadaPHONY := __all 23121c2a13SMasahiro Yamada__all: 24ba634eceSMasahiro Yamada 251da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 261da177e4SLinus Torvalds# to get the ordering right. 271da177e4SLinus Torvalds# 281da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 291da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 301da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 31f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 321da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 331da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 341da177e4SLinus Torvalds# is now up to date. 351da177e4SLinus Torvalds# 361da177e4SLinus Torvalds# The only cases where we need to modify files which have global 371da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 381da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 391da177e4SLinus Torvalds# prepare rule. 401da177e4SLinus Torvalds 41221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 423812b8c5SMasahiro Yamada 433812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 443812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 453812b8c5SMasahiro YamadaMAKEFLAGS += -rR 463812b8c5SMasahiro Yamada 473812b8c5SMasahiro Yamada# Avoid funny character set dependencies 483812b8c5SMasahiro Yamadaunexport LC_ALL 493812b8c5SMasahiro YamadaLC_COLLATE=C 503812b8c5SMasahiro YamadaLC_NUMERIC=C 513812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 523812b8c5SMasahiro Yamada 533812b8c5SMasahiro Yamada# Avoid interference with shell env settings 543812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 553812b8c5SMasahiro Yamada 56066b7ed9SMichal Marek# Beautify output 57066b7ed9SMichal Marek# --------------------------------------------------------------------------- 58066b7ed9SMichal Marek# 598962b6b4SMasahiro Yamada# Most of build commands in Kbuild start with "cmd_". You can optionally define 608962b6b4SMasahiro Yamada# "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from 618962b6b4SMasahiro Yamada# that command is printed by default. 62066b7ed9SMichal Marek# 638962b6b4SMasahiro Yamada# e.g.) 648962b6b4SMasahiro Yamada# quiet_cmd_depmod = DEPMOD $(MODLIB) 658962b6b4SMasahiro Yamada# cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE) 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# 708962b6b4SMasahiro Yamada# $(Q)$(MAKE) $(build)=scripts/basic 71066b7ed9SMichal Marek# 726ae4b986SMasahiro Yamada# If KBUILD_VERBOSE contains 1, the whole command is echoed. 736ae4b986SMasahiro Yamada# If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed. 74066b7ed9SMichal Marek# 751da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 761da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 771da177e4SLinus Torvalds 781da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 791da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 801da177e4SLinus Torvaldsendif 811da177e4SLinus Torvalds 82066b7ed9SMichal Marekquiet = quiet_ 83066b7ed9SMichal MarekQ = @ 846ae4b986SMasahiro Yamada 856ae4b986SMasahiro Yamadaifneq ($(findstring 1, $(KBUILD_VERBOSE)),) 866ae4b986SMasahiro Yamada quiet = 876ae4b986SMasahiro Yamada Q = 88066b7ed9SMichal Marekendif 89066b7ed9SMichal Marek 90066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 91066b7ed9SMichal Marek# commands 924bf73588SDmitry Goncharov# make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS. 93066b7ed9SMichal Marek 944bf73588SDmitry Goncharovifeq ($(filter 3.%,$(MAKE_VERSION)),) 95fc5d57a9SMasahiro Yamadashort-opts := $(firstword -$(MAKEFLAGS)) 964bf73588SDmitry Goncharovelse 97fc5d57a9SMasahiro Yamadashort-opts := $(filter-out --%,$(MAKEFLAGS)) 984bf73588SDmitry Goncharovendif 994bf73588SDmitry Goncharov 100fc5d57a9SMasahiro Yamadaifneq ($(findstring s,$(short-opts)),) 101066b7ed9SMichal Marekquiet=silent_ 10283d98d73SMasahiro Yamadaoverride KBUILD_VERBOSE := 103066b7ed9SMichal Marekendif 104066b7ed9SMichal Marek 105066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 106066b7ed9SMichal Marek 107bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 108bcf637f5SMasahiro Yamada# C compilation. 109bcf637f5SMasahiro Yamada# 110bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 111bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 112bcf637f5SMasahiro Yamada# of whether they are re-compiled or not. 113bcf637f5SMasahiro Yamada# 114bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details, 115bcf637f5SMasahiro Yamada# including where to get the "sparse" utility. 116bcf637f5SMasahiro Yamada 117bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line") 118bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = $(C) 119bcf637f5SMasahiro Yamadaendif 120bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC 121bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = 0 122bcf637f5SMasahiro Yamadaendif 123bcf637f5SMasahiro Yamada 124bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC 125bcf637f5SMasahiro Yamada 1262f7ab126SMiguel Ojeda# Enable "clippy" (a linter) as part of the Rust compilation. 1272f7ab126SMiguel Ojeda# 1282f7ab126SMiguel Ojeda# Use 'make CLIPPY=1' to enable it. 1292f7ab126SMiguel Ojedaifeq ("$(origin CLIPPY)", "command line") 1302f7ab126SMiguel Ojeda KBUILD_CLIPPY := $(CLIPPY) 1312f7ab126SMiguel Ojedaendif 1322f7ab126SMiguel Ojeda 1332f7ab126SMiguel Ojedaexport KBUILD_CLIPPY 1342f7ab126SMiguel Ojeda 135bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 136bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 137bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line") 138bcf637f5SMasahiro Yamada KBUILD_EXTMOD := $(M) 139bcf637f5SMasahiro Yamadaendif 140bcf637f5SMasahiro Yamada 141bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \ 142bcf637f5SMasahiro Yamada $(error building multiple external modules is not supported)) 143bcf637f5SMasahiro Yamada 1449a68fd7fSMasahiro Yamada$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ 1459a68fd7fSMasahiro Yamada $(error module directory path cannot contain '$x'))) 1469a68fd7fSMasahiro Yamada 14774ee585bSMasahiro Yamada# Remove trailing slashes 14874ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),) 14974ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) 15074ee585bSMasahiro Yamadaendif 15174ee585bSMasahiro Yamada 152bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD 153bcf637f5SMasahiro Yamada 15425b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 15525b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 15625b146c5SMasahiro Yamada# 15725b146c5SMasahiro Yamada# For example, you can do this: 15825b146c5SMasahiro Yamada# 15925b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 16025b146c5SMasahiro Yamada# 16125b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 16225b146c5SMasahiro Yamada# two syntaxes to specify it. 16325b146c5SMasahiro Yamada# 1641da177e4SLinus Torvalds# 1) O= 1651da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1661da177e4SLinus Torvalds# 1671da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 16825b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 16925b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1701da177e4SLinus Torvalds# 1711da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1721da177e4SLinus Torvalds# variable. 1731da177e4SLinus Torvalds 17425b146c5SMasahiro Yamada# Do we want to change the working directory? 1751da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1761da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1771da177e4SLinus Torvaldsendif 1781da177e4SLinus Torvalds 17925b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 18025b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 18125b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 18225b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 18325b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 18425b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 18525b146c5SMasahiro Yamada 18625b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 18725b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 18825b146c5SMasahiro Yamadaelse 18925b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 19025b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 19125b146c5SMasahiro Yamada 19225b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 19325b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 19425b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 19525b146c5SMasahiro Yamadaelse 19625b146c5SMasahiro Yamadaneed-sub-make := 1 19751193b76SRobert Jarzmikendif 19851193b76SRobert Jarzmik 19930cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 20030cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile))) 2011da177e4SLinus Torvalds 20225b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 20325b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 20425b146c5SMasahiro Yamadaendif 20525b146c5SMasahiro Yamada 206688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 207688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 208688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 209688931a5SMasahiro Yamadaneed-sub-make := 1 210688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 21193fdddfeSMasahiro Yamada$(this-makefile): ; 212688931a5SMasahiro Yamadaendif 213688931a5SMasahiro Yamada 21425b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 215221cc2d2SMasahiro Yamadaexport sub_make_done := 1 216221cc2d2SMasahiro Yamada 217688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 218688931a5SMasahiro Yamada 219121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 2200b35786dSMilton Miller 221121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 22216f89098SCharles Keepax @: 2230b35786dSMilton Miller 224c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 225121c2a13SMasahiro Yamada__sub-make: 22625b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 2271da177e4SLinus Torvalds 228688931a5SMasahiro Yamadaendif # need-sub-make 229221cc2d2SMasahiro Yamadaendif # sub_make_done 230688931a5SMasahiro Yamada 2311da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 232688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 2331da177e4SLinus Torvalds 2347ff52571SMasahiro Yamada# Do not print "Entering directory ...", 2357ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 2367ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 2377ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 2387ff52571SMasahiro Yamada 23925b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2409da0763bSMichal Marek # building in the source tree 2419da0763bSMichal Marek srctree := . 242051f278eSMasahiro Yamada building_out_of_srctree := 2439da0763bSMichal Marekelse 24425b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2459da0763bSMichal Marek # building in a subdirectory of the source tree 2469da0763bSMichal Marek srctree := .. 2479da0763bSMichal Marek else 24825b146c5SMasahiro Yamada srctree := $(abs_srctree) 2499da0763bSMichal Marek endif 250051f278eSMasahiro Yamada building_out_of_srctree := 1 2519da0763bSMichal Marekendif 2522c1f4f12SMasahiro Yamada 25395fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 25495fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 25595fd3f87SMasahiro Yamadaendif 2562c1f4f12SMasahiro Yamada 2577e1c0477SMichal Marekobjtree := . 2586b12de69SMasahiro YamadaVPATH := $(srctree) 2591da177e4SLinus Torvalds 260051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2611da177e4SLinus Torvalds 2622c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2632c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2642c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2652c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2662c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2672c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2682c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2692c1f4f12SMasahiro Yamada 2702c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2712c1f4f12SMasahiro Yamada 27222340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 27322340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2742c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 27559b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2764623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 27705e96e96SMasahiro Yamada outputmakefile rustavailable rustfmt rustfmtcheck 278805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install 279805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed. 280805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \ 281805b2e1dSMasahiro Yamada headers_install modules_install kernelrelease image_name 282993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ 283993bdde9SMasahiro Yamada image_name 284aa4847dbSMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/ 2852c1f4f12SMasahiro Yamada 2862042b548SMasahiro Yamadaconfig-build := 2872042b548SMasahiro Yamadamixed-build := 2882042b548SMasahiro Yamadaneed-config := 1 289805b2e1dSMasahiro Yamadaneed-compiler := 1 290d7942413SMasahiro Yamadamay-sync-config := 1 291394053f4SMasahiro Yamadasingle-build := 2922c1f4f12SMasahiro Yamada 2932c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2942c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2952042b548SMasahiro Yamada need-config := 2962c1f4f12SMasahiro Yamada endif 2972c1f4f12SMasahiro Yamadaendif 2982c1f4f12SMasahiro Yamada 299805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) 300805b2e1dSMasahiro Yamada ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) 301805b2e1dSMasahiro Yamada need-compiler := 302805b2e1dSMasahiro Yamada endif 303805b2e1dSMasahiro Yamadaendif 304805b2e1dSMasahiro Yamada 305d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 306d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 3072042b548SMasahiro Yamada may-sync-config := 308d7942413SMasahiro Yamada endif 309d7942413SMasahiro Yamadaendif 310d7942413SMasahiro Yamada 311d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 3122042b548SMasahiro Yamada may-sync-config := 313d7942413SMasahiro Yamadaendif 314d7942413SMasahiro Yamada 3152c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 316efbf9726SMasahiro Yamada ifneq ($(filter %config,$(MAKECMDGOALS)),) 3172042b548SMasahiro Yamada config-build := 1 3182c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 3192042b548SMasahiro Yamada mixed-build := 1 3202c1f4f12SMasahiro Yamada endif 3212c1f4f12SMasahiro Yamada endif 3222c1f4f12SMasahiro Yamadaendif 32322340a06SMasahiro Yamada 324394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 325394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 326394053f4SMasahiro Yamada single-build := 1 327394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 328394053f4SMasahiro Yamada mixed-build := 1 329394053f4SMasahiro Yamada endif 330394053f4SMasahiro Yamadaendif 331394053f4SMasahiro Yamada 33222340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 33322340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 33422340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3352042b548SMasahiro Yamada mixed-build := 1 33622340a06SMasahiro Yamada endif 33722340a06SMasahiro Yamadaendif 33822340a06SMasahiro Yamada 3392c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3402c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3412c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3422042b548SMasahiro Yamada mixed-build := 1 3432c1f4f12SMasahiro Yamada endif 3442c1f4f12SMasahiro Yamadaendif 3452c1f4f12SMasahiro Yamada 3462042b548SMasahiro Yamadaifdef mixed-build 3472c1f4f12SMasahiro Yamada# =========================================================================== 3482c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3492c1f4f12SMasahiro Yamada# Handle them one by one. 3502c1f4f12SMasahiro Yamada 3512c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3522c1f4f12SMasahiro Yamada 353121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 3542c1f4f12SMasahiro Yamada @: 3552c1f4f12SMasahiro Yamada 3562c1f4f12SMasahiro Yamada__build_one_by_one: 3572c1f4f12SMasahiro Yamada $(Q)set -e; \ 3582c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3592c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3602c1f4f12SMasahiro Yamada done 3612c1f4f12SMasahiro Yamada 3622042b548SMasahiro Yamadaelse # !mixed-build 3632c1f4f12SMasahiro Yamada 3643204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include 3652c1f4f12SMasahiro Yamada 3662c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3676768fa4bSMasahiro YamadaKERNELRELEASE = $(call read-file, include/config/kernel.release) 3682c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3692c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3702c1f4f12SMasahiro Yamada 3713204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3741da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3751da177e4SLinus Torvalds# 3761da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3771da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3781da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3791da177e4SLinus Torvalds# make ARCH=ia64 3801da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3811da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3841da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3851da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3861da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3871da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3881da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3891da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3901da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3912331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds# Architecture as present in compile.h 3941da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3956752ed90SThomas GleixnerSRCARCH := $(ARCH) 3961da177e4SLinus Torvalds 397d746d647SSam Ravnborg# Additional ARCH settings for x86 398d746d647SSam Ravnborgifeq ($(ARCH),i386) 399d746d647SSam Ravnborg SRCARCH := x86 400d746d647SSam Ravnborgendif 401d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 402d746d647SSam Ravnborg SRCARCH := x86 403d746d647SSam Ravnborgendif 40474b469f2SSam Ravnborg 4055e538790SSam Ravnborg# Additional ARCH settings for sparc 406e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 407e69f58c0SNamhyung Kim SRCARCH := sparc 408e69f58c0SNamhyung Kimendif 409a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 4105e538790SSam Ravnborg SRCARCH := sparc 411a439fe51SSam Ravnborgendif 4122fb9b1bdSSam Ravnborg 4135f6e0fe0SMasahiro Yamada# Additional ARCH settings for parisc 4145f6e0fe0SMasahiro Yamadaifeq ($(ARCH),parisc64) 4155f6e0fe0SMasahiro Yamada SRCARCH := parisc 4165f6e0fe0SMasahiro Yamadaendif 4175f6e0fe0SMasahiro Yamada 418f02aa48dSMasahiro Yamadaexport cross_compiling := 419f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH)) 420f02aa48dSMasahiro Yamadacross_compiling := 1 421f02aa48dSMasahiro Yamadaendif 422f02aa48dSMasahiro Yamada 42314cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 42441263fc6SBen Gardinerexport KCONFIG_CONFIG 42514cdd3c4SRoman Zippel 4261da177e4SLinus Torvalds# SHELL used by kbuild 427858805b3SMasahiro YamadaCONFIG_SHELL := sh 4281da177e4SLinus Torvalds 4296d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4306d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4316d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 432d7f14c66SUwe Kleine-König 433a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 434e9c28192SNathan Chancellorifneq ($(filter %/,$(LLVM)),) 435e9c28192SNathan ChancellorLLVM_PREFIX := $(LLVM) 436e9c28192SNathan Chancellorelse ifneq ($(filter -%,$(LLVM)),) 437e9c28192SNathan ChancellorLLVM_SUFFIX := $(LLVM) 438e9c28192SNathan Chancellorendif 439e9c28192SNathan Chancellor 440e9c28192SNathan ChancellorHOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 441e9c28192SNathan ChancellorHOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 442a0d1c951SMasahiro Yamadaelse 4431da177e4SLinus TorvaldsHOSTCC = gcc 4441da177e4SLinus TorvaldsHOSTCXX = g++ 445a0d1c951SMasahiro Yamadaendif 4462f7ab126SMiguel OjedaHOSTRUSTC = rustc 447d5ea4fecSChun-Tse ShaoHOSTPKG_CONFIG = pkg-config 4487f3a59dbSMasahiro Yamada 449f67695c9SElliot BermanKBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 4501e240781SArnd Bergmann -O2 -fomit-frame-pointer -std=gnu11 \ 4514d94f910SMark Rutland -Wdeclaration-after-statement 452f67695c9SElliot BermanKBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) 453f67695c9SElliot BermanKBUILD_USERLDFLAGS := $(USERLDFLAGS) 4547f3a59dbSMasahiro Yamada 4552f7ab126SMiguel Ojeda# These flags apply to all Rust code in the tree, including the kernel and 4562f7ab126SMiguel Ojeda# host programs. 4572f7ab126SMiguel Ojedaexport rust_common_flags := --edition=2021 \ 4582f7ab126SMiguel Ojeda -Zbinary_dep_depinfo=y \ 4592f7ab126SMiguel Ojeda -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \ 4602f7ab126SMiguel Ojeda -Dunreachable_pub -Dnon_ascii_idents \ 4612f7ab126SMiguel Ojeda -Wmissing_docs \ 4622f7ab126SMiguel Ojeda -Drustdoc::missing_crate_level_docs \ 4632f7ab126SMiguel Ojeda -Dclippy::correctness -Dclippy::style \ 4642f7ab126SMiguel Ojeda -Dclippy::suspicious -Dclippy::complexity \ 4652f7ab126SMiguel Ojeda -Dclippy::perf \ 4662f7ab126SMiguel Ojeda -Dclippy::let_unit_value -Dclippy::mut_mut \ 4672f7ab126SMiguel Ojeda -Dclippy::needless_bitwise_bool \ 4682f7ab126SMiguel Ojeda -Dclippy::needless_continue \ 4692f7ab126SMiguel Ojeda -Wclippy::dbg_macro 4702f7ab126SMiguel Ojeda 471f67695c9SElliot BermanKBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 472735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 4732f7ab126SMiguel OjedaKBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ 4742f7ab126SMiguel Ojeda -Zallow-features= $(HOSTRUSTFLAGS) 475f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 476f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds# Make variables (CC, etc...) 4791da177e4SLinus TorvaldsCPP = $(CC) -E 480a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 481e9c28192SNathan ChancellorCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 482e9c28192SNathan ChancellorLD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 483e9c28192SNathan ChancellorAR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 484e9c28192SNathan ChancellorNM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 485e9c28192SNathan ChancellorOBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 486e9c28192SNathan ChancellorOBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 487e9c28192SNathan ChancellorREADELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 488e9c28192SNathan ChancellorSTRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 489a0d1c951SMasahiro Yamadaelse 490a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 491a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 4921da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4931da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4941da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4951da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 496eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 497a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 498a0d1c951SMasahiro Yamadaendif 4992f7ab126SMiguel OjedaRUSTC = rustc 5002f7ab126SMiguel OjedaRUSTDOC = rustdoc 5012f7ab126SMiguel OjedaRUSTFMT = rustfmt 5022f7ab126SMiguel OjedaCLIPPY_DRIVER = clippy-driver 5032f7ab126SMiguel OjedaBINDGEN = bindgen 5042f7ab126SMiguel OjedaCARGO = cargo 505e83b9f55SAndrii NakryikoPAHOLE = pahole 506c9a0f3b8SJiri OlsaRESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 50773a4f6dbSMasahiro YamadaLEX = flex 50873a4f6dbSMasahiro YamadaYACC = bison 5091da177e4SLinus TorvaldsAWK = awk 510caa27b66SSam RavnborgINSTALLKERNEL := installkernel 511436e980eSDominique MartinetDEPMOD = depmod 5121da177e4SLinus TorvaldsPERL = perl 513e9781b52SMasahiro YamadaPYTHON3 = python3 5141da177e4SLinus TorvaldsCHECK = sparse 515858805b3SMasahiro YamadaBASH = bash 516e4a42c82SDenis EfremovKGZIP = gzip 517e4a42c82SDenis EfremovKBZIP2 = bzip2 518e4a42c82SDenis EfremovKLZOP = lzop 5198dfb61dcSDenis EfremovLZMA = lzma 5208dfb61dcSDenis EfremovLZ4 = lz4c 5218dfb61dcSDenis EfremovXZ = xz 52248f7ddf7SNick TerrellZSTD = zstd 5238dfb61dcSDenis Efremov 5249741e07eSJiri OlsaPAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) 5259741e07eSJiri Olsa 52680a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 5276c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 5280c22be07SDouglas AndersonNOSTDINC_FLAGS := 5296588169dSSam RavnborgCFLAGS_MODULE = 5302f7ab126SMiguel OjedaRUSTFLAGS_MODULE = 5316588169dSSam RavnborgAFLAGS_MODULE = 5326588169dSSam RavnborgLDFLAGS_MODULE = 5331da177e4SLinus TorvaldsCFLAGS_KERNEL = 5342f7ab126SMiguel OjedaRUSTFLAGS_KERNEL = 5351da177e4SLinus TorvaldsAFLAGS_KERNEL = 5368debed3eSMasahiro YamadaLDFLAGS_vmlinux = 5371da177e4SLinus Torvalds 538abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 539abbf1590SDavid HowellsUSERINCLUDE := \ 5409d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 5419d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 542abbf1590SDavid Howells -I$(srctree)/include/uapi \ 5433308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 544ce6ed1c4SMasahiro Yamada -include $(srctree)/include/linux/compiler-version.h \ 545abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 546abbf1590SDavid Howells 5471da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 5481da177e4SLinus Torvalds# Needed to be compatible with the O= option 549abbf1590SDavid HowellsLINUXINCLUDE := \ 5509d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 5519d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 552051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 553f8224f7fSMasahiro Yamada -I$(objtree)/include \ 554f8224f7fSMasahiro Yamada $(USERINCLUDE) 5551da177e4SLinus Torvalds 55642a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 557eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 55842a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 559b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 5603bc753c0SJason A. Donenfeld -Werror=return-type -Wno-format-security -funsigned-char \ 561e8c07082SArnd Bergmann -std=gnu11 562433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 5632f7ab126SMiguel OjedaKBUILD_RUSTFLAGS := $(rust_common_flags) \ 564c83b16ceSMasahiro Yamada --target=$(objtree)/scripts/target.json \ 5652f7ab126SMiguel Ojeda -Cpanic=abort -Cembed-bitcode=n -Clto=n \ 5662f7ab126SMiguel Ojeda -Cforce-unwind-tables=n -Ccodegen-units=1 \ 5672f7ab126SMiguel Ojeda -Csymbol-mangling-version=v0 \ 5682f7ab126SMiguel Ojeda -Crelocation-model=static \ 5692f7ab126SMiguel Ojeda -Zfunction-sections=n \ 5702f7ab126SMiguel Ojeda -Dclippy::float_arithmetic 5712f7ab126SMiguel Ojeda 57280c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 57380c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 5742f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL := 5756588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 5766588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 5772f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_MODULE := --cfg MODULE 57810df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 579d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 5805241ab4cSMasahiro YamadaCLANG_FLAGS := 5811da177e4SLinus Torvalds 5822f7ab126SMiguel Ojedaifeq ($(KBUILD_CLIPPY),1) 5832f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY_QUIET := CLIPPY 5842f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 5852f7ab126SMiguel Ojedaelse 5862f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY_QUIET := RUSTC 5872f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY = $(RUSTC) 5882f7ab126SMiguel Ojedaendif 5892f7ab126SMiguel Ojeda 5902f7ab126SMiguel Ojedaifdef RUST_LIB_SRC 5912f7ab126SMiguel Ojeda export RUST_LIB_SRC 5922f7ab126SMiguel Ojedaendif 5932f7ab126SMiguel Ojeda 5942f7ab126SMiguel Ojeda# Allows the usage of unstable features in stable compilers. 5952f7ab126SMiguel Ojedaexport RUSTC_BOOTSTRAP := 1 5962f7ab126SMiguel Ojeda 597d5ea4fecSChun-Tse Shaoexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 5982f7ab126SMiguel Ojedaexport RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO 5992f7ab126SMiguel Ojedaexport HOSTRUSTC KBUILD_HOSTRUSTFLAGS 600d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 601d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 60248f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 6037bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 604f67695c9SElliot Bermanexport KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 6051da177e4SLinus Torvalds 606d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 6070e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 6082f7ab126SMiguel Ojedaexport KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE 609222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 6102f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE 6112f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL 6129741e07eSJiri Olsaexport PAHOLE_FLAGS 6131da177e4SLinus Torvalds 6141da177e4SLinus Torvalds# Files to ignore in find ... statements 6151da177e4SLinus Torvalds 616ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 617ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 618ae63b2d7SPrarit Bhargava -prune -o 619450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 620450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds# =========================================================================== 6231da177e4SLinus Torvalds# Rules shared between *config targets and build targets 6241da177e4SLinus Torvalds 625312a3d09SCao jin# Basic helpers built in scripts/basic/ 6264f193362SPaul SmithPHONY += scripts_basic 6271da177e4SLinus Torvaldsscripts_basic: 6281da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 6291da177e4SLinus Torvalds 6304f193362SPaul SmithPHONY += outputmakefile 6312728fcfaSMasahiro Yamadaifdef building_out_of_srctree 632e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 633fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 634fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 635fd5f0cd6SJan Beulich# output directory. 6363a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 6373a51ff34SVladimir Kondratiev# ignore whole output directory 6382728fcfaSMasahiro Yamada 6392728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN Makefile 6402728fcfaSMasahiro Yamada cmd_makefile = { \ 6412728fcfaSMasahiro Yamada echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ 6422728fcfaSMasahiro Yamada echo "include $(srctree)/Makefile"; \ 6432728fcfaSMasahiro Yamada } > Makefile 6442728fcfaSMasahiro Yamada 6451da177e4SLinus Torvaldsoutputmakefile: 6464b098659SMasahiro Yamada @if [ -f $(srctree)/.config -o \ 647e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 648e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 649e8e83a23SMasahiro Yamada echo >&2 "***"; \ 650e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 651e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 652e8e83a23SMasahiro Yamada echo >&2 "***"; \ 653e8e83a23SMasahiro Yamada false; \ 654e8e83a23SMasahiro Yamada fi 65592979997SAndi Kleen $(Q)ln -fsn $(srctree) source 6562728fcfaSMasahiro Yamada $(call cmd,makefile) 657156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 658156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 659fd5f0cd6SJan Beulichendif 6601da177e4SLinus Torvalds 661db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 662db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 663db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 664db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade. 6656072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 666db07562aSNick Desaulniers 667db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 6686f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang 669ae6b289aSChris Friesendif 670ae6b289aSChris Fries 67157fd251cSMasahiro Yamada# Include this also for config targets because some architectures need 67257fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE. 673805b2e1dSMasahiro Yamadaifdef need-compiler 67457fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler 675805b2e1dSMasahiro Yamadaendif 67657fd251cSMasahiro Yamada 6772042b548SMasahiro Yamadaifdef config-build 6781da177e4SLinus Torvalds# =========================================================================== 6791da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 6801da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 6831da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 6841da177e4SLinus Torvalds# used for 'make defconfig' 6853204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 686315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 6871da177e4SLinus Torvalds 68836de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 68931110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 69031110ebbSSam Ravnborg 69136de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 6921da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 6931da177e4SLinus Torvalds 6942042b548SMasahiro Yamadaelse #!config-build 6951da177e4SLinus Torvalds# =========================================================================== 6961da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 6971da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 6981da177e4SLinus Torvalds 6992c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 700121c2a13SMasahiro Yamada# but instead __all depend on modules 7012c1f4f12SMasahiro YamadaPHONY += all 7022c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 703121c2a13SMasahiro Yamada__all: all 7042c1f4f12SMasahiro Yamadaelse 705121c2a13SMasahiro Yamada__all: modules 7062c1f4f12SMasahiro Yamadaendif 7072c1f4f12SMasahiro Yamada 70832164845SMasahiro Yamadatargets := 70932164845SMasahiro Yamada 7102c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 7112c1f4f12SMasahiro Yamada# Normally, just do built-in. 7122c1f4f12SMasahiro Yamada 7132c1f4f12SMasahiro YamadaKBUILD_MODULES := 7142c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 7152c1f4f12SMasahiro Yamada 7162c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 7172c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 7184b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 7192c1f4f12SMasahiro Yamadaendif 7202c1f4f12SMasahiro Yamada 7212c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 7222c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 7232c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 7242c1f4f12SMasahiro Yamada 7256ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) 7262c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 7272c1f4f12SMasahiro Yamadaendif 7282c1f4f12SMasahiro Yamada 7292c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 7302c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 7312c1f4f12SMasahiro Yamadaendif 7322c1f4f12SMasahiro Yamada 7332c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 7342c1f4f12SMasahiro Yamada 7352042b548SMasahiro Yamadaifdef need-config 736d93a18f2SMasahiro Yamadainclude include/config/auto.conf 737d93a18f2SMasahiro Yamadaendif 738d93a18f2SMasahiro Yamada 7391da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 7401da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 7415750121aSMasahiro Yamadacore-y := 7425750121aSMasahiro Yamadadrivers-y := 7431da177e4SLinus Torvaldslibs-y := lib/ 7441da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 7451da177e4SLinus Torvalds 746315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 747315bab4eSMasahiro Yamada# command line. 748315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 749315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 750315bab4eSMasahiro Yamadaall: vmlinux 751315bab4eSMasahiro Yamada 7527d73c3e9SNick DesaulniersCFLAGS_GCOV := -fprofile-arcs -ftest-coverage 7537d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 7547d73c3e9SNick DesaulniersCFLAGS_GCOV += -fno-tree-loop-im 7557d73c3e9SNick Desaulniersendif 7565aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 757315bab4eSMasahiro Yamada 758b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 759b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 760b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 761b1f4ff74SPaulo Zanoniendif 762b1f4ff74SPaulo Zanoni 7633204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 764315bab4eSMasahiro Yamada 7652042b548SMasahiro Yamadaifdef need-config 7662042b548SMasahiro Yamadaifdef may-sync-config 767315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 768315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 769315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 770d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 7711da177e4SLinus Torvalds 77205850719SMasahiro Yamada$(KCONFIG_CONFIG): 77305850719SMasahiro Yamada @echo >&2 '***' 77405850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 77505850719SMasahiro Yamada @echo >&2 '***' 77605850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 77705850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 77805850719SMasahiro Yamada @echo >&2 '***' 77905850719SMasahiro Yamada @/bin/false 7801da177e4SLinus Torvalds 78161277981SUlf Magnusson# The actual configuration files used during the build are stored in 78261277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 78361277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 7849390dff6SMasahiro Yamada# 7859390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 7869390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 787f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 788d952cfafSMasahiro Yamada# 789d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 790d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input. 7912f7ab126SMiguel Ojeda%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) 792d952cfafSMasahiro Yamada $(Q)$(kecho) " SYNC $@" 793d952cfafSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 7942042b548SMasahiro Yamadaelse # !may-sync-config 795d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 796d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 797d7942413SMasahiro Yamada# Use auto.conf to trigger the test 7989ee4e336SSam RavnborgPHONY += include/config/auto.conf 7999ee4e336SSam Ravnborg 8009ee4e336SSam Ravnborginclude/config/auto.conf: 8014b098659SMasahiro Yamada @test -e include/generated/autoconf.h -a -e $@ || ( \ 8025369f550SMichal Marek echo >&2; \ 8035369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 8045369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 8055369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 8065369f550SMichal Marek echo >&2 ; \ 8079ee4e336SSam Ravnborg /bin/false) 8089ee4e336SSam Ravnborg 809d7942413SMasahiro Yamadaendif # may-sync-config 8102042b548SMasahiro Yamadaendif # need-config 8111da177e4SLinus Torvalds 8127d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-delete-null-pointer-checks 813ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 814bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 815bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 8166f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 817a1c48bb1SGeert Uytterhoeven 81815f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 819a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 8202f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=2 82115f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 82215f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 8232f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=s 8241da177e4SLinus Torvaldsendif 8251da177e4SLinus Torvalds 8262f7ab126SMiguel Ojeda# Always set `debug-assertions` and `overflow-checks` because their default 8272f7ab126SMiguel Ojeda# depends on `opt-level` and `debug-assertions`, respectively. 8282f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) 8292f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) 8302f7ab126SMiguel Ojeda 83169102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 8327d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 8337d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to 8347d73c3e9SNick Desaulniers# -fno-allow-store-data-races. 83569102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 836b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 8377d73c3e9SNick Desaulniersendif 83869102311SJiri Kosina 8391873e870SAndi Kleenifdef CONFIG_READABLE_ASM 8401873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 8411873e870SAndi Kleen# reorder blocks reorders the control in the function 8421873e870SAndi Kleen# ipa clone creates specialized cloned functions 8431873e870SAndi Kleen# partial inlining inlines only parts of functions 8447d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 8451873e870SAndi Kleenendif 8461873e870SAndi Kleen 84708f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 848a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 84935bb5b1eSAndi Kleenendif 85035bb5b1eSAndi Kleen 851893ab004SMasahiro Yamadastackp-flags-y := -fno-stack-protector 852050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 853050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 8542a61f474SMasahiro Yamada 8552a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 856e06b8b98SSam Ravnborg 857efa80b02SMasahiro YamadaKBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror 858efa80b02SMasahiro YamadaKBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y) 859f0be87c4SLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds 8603fe617ccSLinus Torvalds 8612f7ab126SMiguel OjedaKBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings 8622f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) 8632f7ab126SMiguel Ojeda 864076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 865e8c07082SArnd Bergmann# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. 866a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 867d936eb23SLinus Torvaldselse 868d936eb23SLinus Torvalds 86949832c81SRandy Dunlap# gcc inanely warns about local variables called 'main' 87049832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main 871cfe17c9bSMasahiro Yamadaendif 872cfe17c9bSMasahiro Yamada 873885480b0SNathan Chancellor# These warnings generated too much noise in a regular build. 874885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 875885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 8760a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 8776272cc38SNathan Chancellor 87849beadbdSLinus Torvalds# These result in bogus false positives 87949beadbdSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) 88049beadbdSLinus Torvalds 8811da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 882a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 8832f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 8841da177e4SLinus Torvaldselse 8857e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 8867e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 8877e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 8887e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 8897e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 8902f7ab126SMiguel Ojeda# In the Rust target specification, "frame-pointer" is set explicitly 8912f7ab126SMiguel Ojeda# to "may-omit". 8927e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 893a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 8941da177e4SLinus Torvaldsendif 8957e9501fdSRabin Vincentendif 8961da177e4SLinus Torvalds 897f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern. 898f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN 899709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 900709a972eSKees Cookendif 901709a972eSKees Cook 902f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value. 903f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO 904f0fe00d4Sglider@google.comKBUILD_CFLAGS += -ftrivial-auto-var-init=zero 905607e57c6SKees Cookifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 906607e57c6SKees Cook# https://github.com/llvm/llvm-project/issues/44842 9074e3feaadSNathan ChancellorCC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 9084e3feaadSNathan Chancellorexport CC_AUTO_VAR_INIT_ZERO_ENABLER 9094e3feaadSNathan ChancellorKBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) 910f0fe00d4Sglider@google.comendif 911f02003c8SKees Cookendif 912f0fe00d4Sglider@google.com 91339218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes 91439218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers. 91539218ff4SKees CookKBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 91639218ff4SKees Cook 917a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 918a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS 919a82adfd5SKees CookKBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 920a82adfd5SKees Cookendif 921a82adfd5SKees Cook 922606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 9233b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC 92407d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 9252f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 9262f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 9272f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 9282f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 9292f4df001SVasily Gorbik endif 9302f4df001SVasily Gorbik endif 93107d04081SVasily Gorbikendif 93222c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 933280981d6SSathvika Vasireddy ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT 93422c8542dSSami Tolvanen CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 93522c8542dSSami Tolvanen endif 936280981d6SSathvika Vasireddyendif 9373b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 9383b15cdc1SSami Tolvanen ifdef CONFIG_HAVE_C_RECORDMCOUNT 9393b15cdc1SSami Tolvanen BUILD_C_RECORDMCOUNT := y 9403b15cdc1SSami Tolvanen export BUILD_C_RECORDMCOUNT 9413b15cdc1SSami Tolvanen endif 9423b15cdc1SSami Tolvanenendif 943a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 9447d73c3e9SNick Desaulniers # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 945f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 946f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 947f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 948a2546faeSSteven Rostedt endif 949f28bc3c3SVasily Gorbikendif 950f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 951f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 952f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 95316444a8aSArnaldo Carvalho de Meloendif 95416444a8aSArnaldo Carvalho de Melo 95591341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 95691341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 9577d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-inline-functions-called-once 95891341d4bSSam Ravnborgendif 95991341d4bSSam Ravnborg 9602f7ab126SMiguel Ojeda# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). 96190ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 962e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 9632f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y 964e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 96590ad4052SMasahiro Yamadaendif 96690ad4052SMasahiro Yamada 967d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK 9689beccca0SArd Biesheuvelifndef CONFIG_DYNAMIC_SCS 969d08b9f0cSSami TolvanenCC_FLAGS_SCS := -fsanitize=shadow-call-stack 970d08b9f0cSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_SCS) 9719beccca0SArd Biesheuvelendif 972d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS 973d08b9f0cSSami Tolvanenendif 974d08b9f0cSSami Tolvanen 975dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG 976dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN 9772b868952SAlexander LobakinCC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 9787f69180bSMasahiro YamadaKBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache 979dc5723b0SSami Tolvanenelse 9802b868952SAlexander LobakinCC_FLAGS_LTO := -flto 981dc5723b0SSami Tolvanenendif 982dc5723b0SSami TolvanenCC_FLAGS_LTO += -fvisibility=hidden 98322d429e7SSami Tolvanen 98422d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size 98522d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5 98624845dcbSNick Desaulniers 9870236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion 9880236526dSTor Vic# when using lld < 13.0.0. 98924845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0) 990fccb3d3eSMasahiro Yamadaifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y) 99124845dcbSNick DesaulniersKBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) 99224845dcbSNick Desaulniersendif 993dc5723b0SSami Tolvanenendif 9940236526dSTor Vicendif 995dc5723b0SSami Tolvanen 996dc5723b0SSami Tolvanenifdef CONFIG_LTO 9975e95325fSSami TolvanenKBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 9985e95325fSSami TolvanenKBUILD_AFLAGS += -fno-lto 999dc5723b0SSami Tolvanenexport CC_FLAGS_LTO 1000dc5723b0SSami Tolvanenendif 1001dc5723b0SSami Tolvanen 1002cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG 100389245600SSami TolvanenCC_FLAGS_CFI := -fsanitize=kcfi 1004cf68fffbSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_CFI) 1005cf68fffbSSami Tolvanenexport CC_FLAGS_CFI 1006cf68fffbSSami Tolvanenendif 1007cf68fffbSSami Tolvanen 1008d49a0626SPeter Zijlstraifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) 1009d49a0626SPeter ZijlstraKBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) 101009c60546SFeng Tangendif 101109c60546SFeng Tang 1012e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 101304e85bbfSAlexey DobriyanNOSTDINC_FLAGS += -nostdinc 1014e8e69931SSam Ravnborg 10151da177e4SLinus Torvalds# warn about C99 declaration after statement 1016a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 10171da177e4SLinus Torvalds 10180bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 10198289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 10200bb95f80SKees Cook 1021070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 1022fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 10231da177e4SLinus Torvalds 1024552a23a0SGustavo A. R. Silva# In order to make sure new function cast mismatches are not introduced 1025552a23a0SGustavo A. R. Silva# in the kernel (to avoid tripping CFI checking), the kernel should be 1026552a23a0SGustavo A. R. Silva# globally built with -Wcast-function-type. 1027552a23a0SGustavo A. R. SilvaKBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) 1028552a23a0SGustavo A. R. Silva 1029217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 1030217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 1031217c3e01SStephen Rothwell 10325c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 10335a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 10345c45de21SLinus Torvalds 1035adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 1036adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 1037adc71920SLinus Torvalds 103878a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 10397d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 10407d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized 10417d73c3e9SNick Desaulniersendif 104278a5255fSLinus Torvalds 104386cffecdSKees Cook# The allocators already balk at large sizes, so silence the compiler 104486cffecdSKees Cook# warnings for bounds checks involving those possible values. While 104586cffecdSKees Cook# -Wno-alloc-size-larger-than would normally be used here, earlier versions 104686cffecdSKees Cook# of gcc (<9.1) weirdly don't handle the option correctly when _other_ 104786cffecdSKees Cook# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX 104886cffecdSKees Cook# doesn't work (as it is documented to), silently resolving to "0" prior to 104986cffecdSKees Cook# version 9.1 (and producing an error more recently). Numeric values larger 105086cffecdSKees Cook# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently 105186cffecdSKees Cook# ignored, continuing to default to PTRDIFF_MAX. So, left with no other 105286cffecdSKees Cook# choice, we must perform a versioned check to disable this warning. 105386cffecdSKees Cook# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au 105488b61e3bSNick DesaulniersKBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than 105588b61e3bSNick DesaulniersKBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) 105686cffecdSKees Cook 1057fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 10588b42cf2fSMasahiro YamadaKBUILD_CFLAGS += -fno-strict-overflow 1059d0115552SLinus Torvalds 10603ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 10617d4eb0d8SMasahiro YamadaKBUILD_CFLAGS += -fno-stack-check 10623ce120b1SLinus Torvalds 10638f7f5c9fSAndi Kleen# conserve stack if available 10647d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 10657d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fconserve-stack 10667d73c3e9SNick Desaulniersendif 10678f7f5c9fSAndi Kleen 1068fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 106987de84c9SMasahiro YamadaKBUILD_CFLAGS += -Werror=date-time 1070fe7c36c7SJosh Triplett 1071ea8daa7bSDaniel Wagner# enforce correct pointer usage 1072ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 1073ea8daa7bSDaniel Wagner 1074c834f0e8SKees Cook# Require designated initializers for all marked structures 1075c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 1076c834f0e8SKees Cook 1077a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 1078a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 1079a73619a8SMasahiro Yamada 1080e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed 1081e0fe0bbeSMasahiro Yamadainclude-y := scripts/Makefile.extrawarn 10826947fd96SMasahiro Yamadainclude-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1083e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN) += scripts/Makefile.kasan 1084e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1085f80be457SAlexander Potapenkoinclude-$(CONFIG_KMSAN) += scripts/Makefile.kmsan 1086e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1087e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV) += scripts/Makefile.kcov 1088613f4b3eSKees Cookinclude-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1089e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1090e0fe0bbeSMasahiro Yamada 1091e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y)) 1092a86fe353SMasahiro Yamada 1093132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last. 1094132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel 1095132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point. 1096bf5438fcSJason Baron 10972f7ab126SMiguel Ojeda# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments 10988cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 10998cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 11008cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 11012f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KRUSTFLAGS) 110252bcc330SSam Ravnborg 1103a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1 1104a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1 110518991197SRoland McGrath 11060d362be5SNick DesaulniersKBUILD_LDFLAGS += -z noexecstack 11070d362be5SNick Desaulniersifeq ($(CONFIG_LD_IS_BFD),y) 11080d362be5SNick DesaulniersKBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 11090d362be5SNick Desaulniersendif 11100d362be5SNick Desaulniers 11115d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 11120f1fe9d6SMasahiro YamadaLDFLAGS_vmlinux += -X 11135d7d18f5SDavid Howellsendif 11145d7d18f5SDavid Howells 11155cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 1116ccb2d173SFangrui Song# ld.lld before 15 did not support -z pack-relative-relocs. 1117ccb2d173SFangrui SongLDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) 11185cf896fbSPeter Collingbourneendif 11195cf896fbSPeter Collingbourne 112059612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the 112159612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script. 112259612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN 1123e1789d7cSXin LiLDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) 112459612b24SNathan Chancellorendif 112559612b24SNathan Chancellor 11267f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 11277f58b487SMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 11287f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 11297f3a59dbSMasahiro Yamada 113080591e61SLuc Van Oostenryck# make the checker run with the right architecture 113180591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 113280591e61SLuc Van Oostenryck 113314516765SLuc Van Oostenryck# insure the checker run with the right endianness 113414516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 113514516765SLuc Van Oostenryck 11361f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 11371f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 11381f2f01b1SLuc Van Oostenryck 11391da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 11401da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 11411da177e4SLinus Torvalds# set in the environment 11421da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 11431da177e4SLinus Torvalds# this default value 11441da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds# 11471da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 11481da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 11491da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds# 1152f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1153f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1154f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 1155f4d4ffc0SJason Cooper# 1156f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1157f4d4ffc0SJason Cooper 1158f4d4ffc0SJason Cooper# 11591da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 11601da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 1161070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 11621da177e4SLinus Torvalds# 11631da177e4SLinus Torvalds 1164df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 11651da177e4SLinus Torvaldsexport MODLIB 11661da177e4SLinus Torvalds 1167e00d8880SMasahiro YamadaPHONY += prepare0 1168e2a666d5SRusty Russell 1169ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 11707f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order 11717f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps 117247801c97SMasahiro Yamada 11731da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 11741da177e4SLinus Torvalds 11755750121aSMasahiro Yamadabuild-dir := . 11765750121aSMasahiro Yamadaclean-dirs := $(sort . Documentation \ 117723febe37SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(core-) \ 117895fb6317SMasahiro Yamada $(drivers-) $(libs-)))) 11791da177e4SLinus Torvalds 11805750121aSMasahiro Yamadaexport ARCH_CORE := $(core-y) 11815750121aSMasahiro Yamadaexport ARCH_LIB := $(filter %/, $(libs-y)) 11825750121aSMasahiro Yamadaexport ARCH_DRIVERS := $(drivers-y) $(drivers-m) 11831f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 11845750121aSMasahiro Yamada 118532164845SMasahiro YamadaKBUILD_VMLINUX_OBJS := ./built-in.a 1186f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES 1187f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1188f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1189f0d50ca0SMasahiro Yamadaelse 1190f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1191f0d50ca0SMasahiro Yamadaendif 1192f0d50ca0SMasahiro Yamada 119332164845SMasahiro Yamadaexport KBUILD_VMLINUX_LIBS 119495698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 11951da177e4SLinus Torvalds 11962441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 11971f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 11981f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 11991f50b80aSMasahiro YamadaKBUILD_MODULES := 1 12001f50b80aSMasahiro Yamadaendif 12011f50b80aSMasahiro Yamada 120232164845SMasahiro Yamada# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 120332164845SMasahiro Yamadaquiet_cmd_ar_vmlinux.a = AR $@ 120432164845SMasahiro Yamada cmd_ar_vmlinux.a = \ 120532164845SMasahiro Yamada rm -f $@; \ 120632164845SMasahiro Yamada $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ 1207fb3041d6SMasahiro Yamada $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) 1208fbe6e37dSNicholas Piggin 120932164845SMasahiro Yamadatargets += vmlinux.a 12105e9e95ccSMasahiro Yamadavmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE 121132164845SMasahiro Yamada $(call if_changed,ar_vmlinux.a) 12122441e78bSNicolas Pitre 12137a342e6cSMasahiro YamadaPHONY += vmlinux_o 12147a342e6cSMasahiro Yamadavmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 12159c5a0ac3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o 1216741f98feSSam Ravnborg 12177a342e6cSMasahiro Yamadavmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o 12187a342e6cSMasahiro Yamada @: 12197a342e6cSMasahiro Yamada 12205d4aeffbSMasahiro YamadaPHONY += vmlinux 12218debed3eSMasahiro Yamada# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, 12228debed3eSMasahiro Yamada# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is 12238debed3eSMasahiro Yamada# unrelated; the decompressors just happen to have the same base name, 12248debed3eSMasahiro Yamada# arch/*/boot/compressed/vmlinux. 12258debed3eSMasahiro Yamada# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. 12268debed3eSMasahiro Yamada# 12278debed3eSMasahiro Yamada# _LDFLAGS_vmlinux is a workaround for the 'private export' bug: 12288debed3eSMasahiro Yamada# https://savannah.gnu.org/bugs/?61463 12298debed3eSMasahiro Yamada# For Make > 4.4, the following simple code will work: 12308debed3eSMasahiro Yamada# vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 12318debed3eSMasahiro Yamadavmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 12328debed3eSMasahiro Yamadavmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) 12335d4aeffbSMasahiro Yamadavmlinux: vmlinux.o $(KBUILD_LDS) modpost 12345d4aeffbSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux 1235392885eeSMasahiro Yamada 12361da177e4SLinus Torvalds# The actual objects are generated when descending, 12371da177e4SLinus Torvalds# make sure no implicit rule kicks in 12389c5a0ac3SMasahiro Yamada$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; 12391da177e4SLinus Torvalds 12401cb86b6cSMasahiro Yamadaifeq ($(origin KERNELRELEASE),file) 1241ec31f868SMasahiro Yamadafilechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) 12421cb86b6cSMasahiro Yamadaelse 12431cb86b6cSMasahiro Yamadafilechk_kernel.release = echo $(KERNELRELEASE) 12441cb86b6cSMasahiro Yamadaendif 12450d0e7718SMichal Marek 124683a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 124724512795SMasahiro Yamadainclude/config/kernel.release: FORCE 12480d0e7718SMichal Marek $(call filechk,kernel.release) 1249cb58455cSSam Ravnborg 1250d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1251d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1252d8821622SMasahiro Yamada# in parallel 1253d8821622SMasahiro YamadaPHONY += scripts 125460df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1255d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1256cb58455cSSam Ravnborg 12571da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 12585bb78269SSam Ravnborg# or the modules are listed in "prepare". 12595bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 12605bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 12615bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 12621da177e4SLinus Torvalds 1263a5139fb3SMasahiro YamadaPHONY += prepare archprepare 12645bb78269SSam Ravnborg 126536de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 12665e9e95ccSMasahiro Yamada asm-generic $(version_h) include/generated/utsrelease.h \ 1267a55f283eSMasahiro Yamada include/generated/compile.h include/generated/autoconf.h remove-stale-files 12685bb78269SSam Ravnborg 126965bba042SMasahiro Yamadaprepare0: archprepare 127060df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 1271ed7ceac1SMasahiro Yamada $(Q)$(MAKE) $(build)=. prepare 127286feeaa8SSam Ravnborg 12731da177e4SLinus Torvalds# All the preparing.. 12740d989ac2SMasahiro Yamadaprepare: prepare0 12752f7ab126SMiguel Ojedaifdef CONFIG_RUST 12762f7ab126SMiguel Ojeda $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v 12772f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust 12782f7ab126SMiguel Ojedaendif 1279b9ab5ebbSJosh Poimboeuf 12801476fee5SMasahiro YamadaPHONY += remove-stale-files 12811476fee5SMasahiro Yamadaremove-stale-files: 12821476fee5SMasahiro Yamada $(Q)$(srctree)/scripts/remove-stale-files 12831476fee5SMasahiro Yamada 12842c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 12857d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 12867d0e5c20SMasahiro Yamada 12872c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 12882c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1289037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1290037fc336SMasahiro Yamada generic=include/asm-generic 12912c1f4f12SMasahiro Yamadauapi-asm-generic: 1292037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1293037fc336SMasahiro Yamada generic=include/uapi/asm-generic 12942c1f4f12SMasahiro Yamada 12951da177e4SLinus Torvalds# Generate some files 12961da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12971da177e4SLinus Torvalds 12981da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 12991da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 13001da177e4SLinus Torvalds 13011da177e4SLinus Torvaldsuts_len := 64 130263104eecSSam Ravnborgdefine filechk_utsrelease.h 13031da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 13041da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 13051da177e4SLinus Torvalds exit 1; \ 13061da177e4SLinus Torvalds fi; \ 1307ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 13081da177e4SLinus Torvaldsendef 13091da177e4SLinus Torvalds 131063104eecSSam Ravnborgdefine filechk_version.h 13119b82f13eSSasha Levin if [ $(SUBLEVEL) -gt 255 ]; then \ 1312ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 1313207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 13149b82f13eSSasha Levin else \ 13159b82f13eSSasha Levin echo \#define LINUX_VERSION_CODE $(shell \ 1316207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 13179b82f13eSSasha Levin fi; \ 13189b82f13eSSasha Levin echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 131988a68672SSasha Levin ((c) > 255 ? 255 : (c)))'; \ 132088a68672SSasha Levin echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 132188a68672SSasha Levin echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 132288a68672SSasha Levin echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 132363104eecSSam Ravnborgendef 132463104eecSSam Ravnborg 13255c816641SMasahiro Yamada$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) 13265c816641SMasahiro Yamada$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) 132743fee2b2SMasahiro Yamada$(version_h): FORCE 13281da177e4SLinus Torvalds $(call filechk,version.h) 13291da177e4SLinus Torvalds 1330273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 133163104eecSSam Ravnborg $(call filechk,utsrelease.h) 133263104eecSSam Ravnborg 1333a55f283eSMasahiro Yamadafilechk_compile.h = $(srctree)/scripts/mkcompile_h \ 1334a55f283eSMasahiro Yamada "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" 1335a55f283eSMasahiro Yamada 1336a55f283eSMasahiro Yamadainclude/generated/compile.h: FORCE 1337a55f283eSMasahiro Yamada $(call filechk,compile.h) 1338a55f283eSMasahiro Yamada 1339179efcb4SVegard NossumPHONY += headerdep 1340179efcb4SVegard Nossumheaderdep: 13419663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 13429663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1343179efcb4SVegard Nossum 13441da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13458d730cfbSDavid Woodhouse# Kernel headers 13468d730cfbSDavid Woodhouse 1347e6883b18SSam Ravnborg#Default location for installed headers 1348e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1349e6883b18SSam Ravnborg 135059b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 135159b2bd05SMasahiro Yamada cmd_headers_install = \ 135259b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 135359b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 135459b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 13556d716275SDavid Woodhouse 13568d730cfbSDavid WoodhousePHONY += headers_install 135759b2bd05SMasahiro Yamadaheaders_install: headers 135859b2bd05SMasahiro Yamada $(call cmd,headers_install) 13594f193362SPaul Smith 13601da177e4SLinus TorvaldsPHONY += archheaders archscripts 13611da177e4SLinus Torvalds 1362a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 13631da177e4SLinus Torvalds 136459b2bd05SMasahiro YamadaPHONY += headers 136559b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 13661b620d53SMasahiro Yamada $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) 1367d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1368d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 13691f85712eSMike Frysinger 1370e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 137159b2bd05SMasahiro Yamadaprepare: headers 1372e949f4c2SMasahiro Yamadaendif 137368475359SDavid Woodhouse 1374bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1375bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1376bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1377bdd7714bSMasahiro Yamada 13788d730cfbSDavid Woodhouse# --------------------------------------------------------------------------- 137914ccc638SMasahiro Yamada# Install 138014ccc638SMasahiro Yamada 138114ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel. 138275ef3122SRandy Dunlap# If DKMS is installed, 'make install' will eventually recurse back 138375ef3122SRandy Dunlap# to this Makefile to build and install external modules. 138414ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 138514ccc638SMasahiro Yamada 1386f774f5bbSMasahiro Yamadaquiet_cmd_install = INSTALL $(INSTALL_PATH) 1387f774f5bbSMasahiro Yamada cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 138814ccc638SMasahiro Yamada 138914ccc638SMasahiro Yamada# --------------------------------------------------------------------------- 13901bb0b18aSMasahiro Yamada# Tools 13911bb0b18aSMasahiro Yamada 139203f16cd0SJosh Poimboeufifdef CONFIG_OBJTOOL 13930d989ac2SMasahiro Yamadaprepare: tools/objtool 13940d989ac2SMasahiro Yamadaendif 13950d989ac2SMasahiro Yamada 13960d989ac2SMasahiro Yamadaifdef CONFIG_BPF 13970d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF 13980d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids 13990d989ac2SMasahiro Yamadaendif 14000d989ac2SMasahiro Yamadaendif 14010d989ac2SMasahiro Yamada 14020d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean 14030d989ac2SMasahiro Yamada 14040d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 14050d989ac2SMasahiro Yamada 14060d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist 14070d989ac2SMasahiro Yamada# in output directory, skip its clean in that case 14080d989ac2SMasahiro Yamadaresolve_btfids_clean: 14090d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),) 14100d989ac2SMasahiro Yamada $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 14110d989ac2SMasahiro Yamadaendif 14120d989ac2SMasahiro Yamada 14131bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake 14141bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_) 14151bb0b18aSMasahiro Yamadatools_silent=s 14161bb0b18aSMasahiro Yamadaendif 14171bb0b18aSMasahiro Yamada 14181bb0b18aSMasahiro Yamadatools/: FORCE 14191bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 14201bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 14211bb0b18aSMasahiro Yamada 14221bb0b18aSMasahiro Yamadatools/%: FORCE 14231bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 14241bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 14251bb0b18aSMasahiro Yamada 14261bb0b18aSMasahiro Yamada# --------------------------------------------------------------------------- 14275a5da78bSShuah Khan# Kernel selftest 14285a5da78bSShuah Khan 14295a5da78bSShuah KhanPHONY += kselftest 14304062eba9SGuillaume Tuckerkselftest: headers 14312bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 14325a5da78bSShuah Khan 14334062eba9SGuillaume Tuckerkselftest-%: headers FORCE 143417eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1435dcb825a9SWang Long 14363d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 14373d6dee7aSBamvor Jian Zhangkselftest-merge: 14383d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 14396d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 14406d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 14413e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 14423d6dee7aSBamvor Jian Zhang 14435a5da78bSShuah Khan# --------------------------------------------------------------------------- 144437c8a5faSRob Herring# Devicetree files 144537c8a5faSRob Herring 144637c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 144737c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 144837c8a5faSRob Herringendif 144937c8a5faSRob Herring 145037c8a5faSRob Herringifneq ($(dtstree),) 145137c8a5faSRob Herring 1452ee476203SMasahiro Yamada%.dtb: dtbs_prepare 145375e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 145437c8a5faSRob Herring 1455ee476203SMasahiro Yamada%.dtbo: dtbs_prepare 145675e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1457ce88c9c7SViresh Kumar 1458ee476203SMasahiro YamadaPHONY += dtbs dtbs_prepare dtbs_install dtbs_check 1459ee476203SMasahiro Yamadadtbs: dtbs_prepare 146037c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 146137c8a5faSRob Herring 1462ee476203SMasahiro Yamada# include/config/kernel.release is actually needed when installing DTBs because 1463ee476203SMasahiro Yamada# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make 1464ee476203SMasahiro Yamada# dtbs_install depend on it as dtbs_install may run as root. 1465ee476203SMasahiro Yamadadtbs_prepare: include/config/kernel.release scripts_dtc 1466ee476203SMasahiro Yamada 146775e89534SRob Herringifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1468e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1469ec201955SRob Herringendif 1470ec201955SRob Herring 1471ec201955SRob Herringifneq ($(CHECK_DTBS),) 1472ec201955SRob Herringdtbs_prepare: dt_binding_check 1473b5154bf6SMasahiro Yamadaendif 1474b5154bf6SMasahiro Yamada 1475b5154bf6SMasahiro Yamadadtbs_check: dtbs 14764f0e3a57SRob Herring 147737c8a5faSRob Herringdtbs_install: 14782431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 147937c8a5faSRob Herring 148037c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 148137c8a5faSRob Herringall: dtbs 148237c8a5faSRob Herringendif 148337c8a5faSRob Herring 148437c8a5faSRob Herringendif 148537c8a5faSRob Herring 148637c8a5faSRob HerringPHONY += scripts_dtc 148737c8a5faSRob Herringscripts_dtc: scripts_basic 148837c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 148937c8a5faSRob Herring 1490e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1491e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1492e10c4321SMasahiro Yamadaendif 1493e10c4321SMasahiro Yamada 1494c473a8d0SMasahiro YamadaPHONY += dt_binding_check 14954f0e3a57SRob Herringdt_binding_check: scripts_dtc 14964f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 14974f0e3a57SRob Herring 1498b6acf807SRob HerringPHONY += dt_compatible_check 1499b6acf807SRob Herringdt_compatible_check: dt_binding_check 1500b6acf807SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ 1501b6acf807SRob Herring 150237c8a5faSRob Herring# --------------------------------------------------------------------------- 15031da177e4SLinus Torvalds# Modules 15041da177e4SLinus Torvalds 15051da177e4SLinus Torvaldsifdef CONFIG_MODULES 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds# By default, build modules as well 15081da177e4SLinus Torvalds 150973d1393eSMichal Marekall: modules 15101da177e4SLinus Torvalds 15114b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider 15124b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to 15134b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them. 15144b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS 15154b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 1 15164b50c8c4SMasahiro Yamadaendif 15174b50c8c4SMasahiro Yamada 15181da177e4SLinus Torvalds# Build modules 1519551559e1STejun Heo# 15201da177e4SLinus Torvalds 1521feb113adSCarlos Llamas# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES 1522f73edc89SMasahiro Yamada# is an exception. 1523f73edc89SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF_MODULES 152474d3320fSMasahiro YamadaKBUILD_BUILTIN := 1 1525f73edc89SMasahiro Yamadamodules: vmlinux 1526f73edc89SMasahiro Yamadaendif 15271da177e4SLinus Torvalds 1528f73edc89SMasahiro Yamadamodules: modules_prepare 1529a6c36632SMichal Marek 15301da177e4SLinus Torvalds# Target to prepare building external modules 1531059bc9fcSMasahiro Yamadamodules_prepare: prepare 1532596b0474SMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/module.lds 15331da177e4SLinus Torvalds 1534961ab4a3SMasahiro Yamadaexport modules_sign_only := 15351da177e4SLinus Torvalds 1536961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y) 1537961ab4a3SMasahiro YamadaPHONY += modules_sign 1538961ab4a3SMasahiro Yamadamodules_sign: modules_install 1539961ab4a3SMasahiro Yamada @: 1540961ab4a3SMasahiro Yamada 1541961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install. 1542961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 1543961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),) 1544961ab4a3SMasahiro Yamadamodules_sign_only := y 1545961ab4a3SMasahiro Yamadaendif 1546961ab4a3SMasahiro Yamadaendif 1547961ab4a3SMasahiro Yamada 1548*8ae071fcSMasahiro Yamadaendif # CONFIG_MODULES 1549*8ae071fcSMasahiro Yamada 1550961ab4a3SMasahiro Yamadamodinst_pre := 1551961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),) 1552961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre 1553961ab4a3SMasahiro Yamadaendif 1554961ab4a3SMasahiro Yamada 1555961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre) 15563e3005dfSMasahiro YamadaPHONY += __modinst_pre 15573e3005dfSMasahiro Yamada__modinst_pre: 15581da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 15591da177e4SLinus Torvalds @rm -f $(MODLIB)/source 1560*8ae071fcSMasahiro Yamada @mkdir -p $(MODLIB) 1561*8ae071fcSMasahiro Yamadaifdef CONFIG_MODULES 15628e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 15631da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 15641da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 15657e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 15661da177e4SLinus Torvalds fi 1567f65a4868SMasahiro Yamada @sed 's:^\(.*\)\.o$$:kernel/\1.ko:' modules.order > $(MODLIB)/modules.order 1568*8ae071fcSMasahiro Yamadaendif 15692c6d9636SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 15702c6d9636SMasahiro Yamada @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 15711da177e4SLinus Torvalds 15721da177e4SLinus Torvalds### 15731da177e4SLinus Torvalds# Cleaning is done on three levels. 15741da177e4SLinus Torvalds# make clean Delete most generated files 15751da177e4SLinus Torvalds# Leave enough to build external modules 15761da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 15771da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 15781da177e4SLinus Torvalds 15791da177e4SLinus Torvalds# Directories & files removed with 'make clean' 158069bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ 15813d32285fSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps \ 15828afc66e8SLinus Torvalds compile_commands.json .thinlto-cache rust/test rust/doc \ 15837ea01d31SMaÃra Canal rust-project.json .vmlinux.objs .vmlinux.export.c 15841da177e4SLinus Torvalds 15851da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 15860663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 1587b0d6207bSMasahiro Yamada arch/$(SRCARCH)/include/generated .objdiff \ 15880663c68cSMasahiro Yamada debian snap tar-install \ 15890663c68cSMasahiro Yamada .config .config.old .version \ 159046457133SMasahiro Yamada Module.symvers \ 15915cca3606SMasahiro Yamada certs/signing_key.pem \ 1592b31f2a49SNayna Jain certs/x509.genkey \ 1593b31f2a49SNayna Jain vmlinux-gdb.py \ 159481f59a26SMasahiro Yamada *.spec rpmbuild \ 1595c83b16ceSMasahiro Yamada rust/libmacros.so 15961da177e4SLinus Torvalds 15971da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 15981da177e4SLinus Torvalds# 15991da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 16001da177e4SLinus Torvalds 160176cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 16021da177e4SLinus Torvalds 1603bd1ee804SPawel Mollvmlinuxclean: 1604bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1605fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1606bd1ee804SPawel Moll 160750d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 16101da177e4SLinus Torvalds# 16111da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1612cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 16131da177e4SLinus Torvalds 1614b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 16151da177e4SLinus Torvalds$(mrproper-dirs): 16161da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 16171da177e4SLinus Torvalds 1618b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 16191da177e4SLinus Torvalds $(call cmd,rmfiles) 16202f7ab126SMiguel Ojeda @find . $(RCS_FIND_IGNORE) \ 16212f7ab126SMiguel Ojeda \( -name '*.rmeta' \) \ 16222f7ab126SMiguel Ojeda -type f -print | xargs rm -f 16231da177e4SLinus Torvalds 16241da177e4SLinus Torvalds# distclean 16251da177e4SLinus Torvalds# 16264f193362SPaul SmithPHONY += distclean 16271da177e4SLinus Torvalds 16281da177e4SLinus Torvaldsdistclean: mrproper 162919c8d912SMasahiro Yamada @find . $(RCS_FIND_IGNORE) \ 16301da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1631f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 16327a02cec5SMasahiro Yamada -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 16337a02cec5SMasahiro Yamada -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 16341da177e4SLinus Torvalds -type f -print | xargs rm -f 16351da177e4SLinus Torvalds 16361da177e4SLinus Torvalds 16371da177e4SLinus Torvalds# Packaging of the kernel to various formats 16381da177e4SLinus Torvalds# --------------------------------------------------------------------------- 16391da177e4SLinus Torvalds 1640bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1641000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1642031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1643000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 16441da177e4SLinus Torvalds 16451da177e4SLinus Torvalds# Brief documentation of the typical targets used 16461da177e4SLinus Torvalds# --------------------------------------------------------------------------- 16471da177e4SLinus Torvalds 16485dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1649a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 16505dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 16515dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 16521da177e4SLinus Torvalds 1653fe69b420SMasahiro YamadaPHONY += help 16541da177e4SLinus Torvaldshelp: 16551da177e4SLinus Torvalds @echo 'Cleaning targets:' 16565ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 16575cc8d246SJesper Juhl @echo ' enough build support to build external modules' 16585ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 16595cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 16601da177e4SLinus Torvalds @echo '' 16611da177e4SLinus Torvalds @echo 'Configuration targets:' 16621da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 16631da177e4SLinus Torvalds @echo '' 16641da177e4SLinus Torvalds @echo 'Other generic targets:' 16651da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 16661da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 16671da177e4SLinus Torvalds @echo '* modules - Build all modules' 16689cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 16691da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 167040ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1671433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1672433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 167362718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 167462718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1675155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1676c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 16771da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 16781da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1679f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 16803f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 16813f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 16823f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 16832fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 168459df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 16852fb9b1bdSSam Ravnborg echo '' 168631b8cc80SRandy Dunlap @echo 'Static analysers:' 16871da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1688aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1689ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1690295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 169174425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 16927f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 16936ad7cbc0SNathan Huckleberry @echo ' clang-analyzer - Check with clang static analyzer' 16946ad7cbc0SNathan Huckleberry @echo ' clang-tidy - Check with clang-tidy' 169574425eeeSNicolas Palix @echo '' 1696eb8305aeSMatthias Maennich @echo 'Tools:' 1697eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1698eb8305aeSMatthias Maennich @echo '' 169931b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1700e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 17015a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 17025a5da78bSShuah Khan @echo ' running kselftest on it' 1703e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1704e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1705e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1706dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1707e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1708e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 17095a5da78bSShuah Khan @echo '' 17102f7ab126SMiguel Ojeda @echo 'Rust targets:' 17112f7ab126SMiguel Ojeda @echo ' rustavailable - Checks whether the Rust toolchain is' 17122f7ab126SMiguel Ojeda @echo ' available and, if not, explains why.' 17132f7ab126SMiguel Ojeda @echo ' rustfmt - Reformat all the Rust code in the kernel' 17142f7ab126SMiguel Ojeda @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' 17152f7ab126SMiguel Ojeda @echo ' is formatted, printing a diff otherwise.' 17162f7ab126SMiguel Ojeda @echo ' rustdoc - Generate Rust documentation' 17172f7ab126SMiguel Ojeda @echo ' (requires kernel .config)' 17182f7ab126SMiguel Ojeda @echo ' rusttest - Runs the Rust tests' 17192f7ab126SMiguel Ojeda @echo ' (requires kernel .config; downloads external repos)' 17202f7ab126SMiguel Ojeda @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' 17212f7ab126SMiguel Ojeda @echo ' (requires kernel .config)' 17222f7ab126SMiguel Ojeda @echo ' dir/file.[os] - Build specified target only' 17232f7ab126SMiguel Ojeda @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' 17242f7ab126SMiguel Ojeda @echo ' Run with RUSTFMT=n to skip reformatting if needed.' 17252f7ab126SMiguel Ojeda @echo ' The output is not intended to be compilable.' 17262f7ab126SMiguel Ojeda @echo ' dir/file.ll - Build the LLVM assembly file' 17272f7ab126SMiguel Ojeda @echo '' 172837c8a5faSRob Herring @$(if $(dtstree), \ 172937c8a5faSRob Herring echo 'Devicetree:'; \ 173037c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 173137c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 17327aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 17337aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 173437c8a5faSRob Herring echo '') 173537c8a5faSRob Herring 173631b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 173731b8cc80SRandy Dunlap @echo ' use "make tools/help"' 173831b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 173931b8cc80SRandy Dunlap @echo '' 17401da177e4SLinus Torvalds @echo 'Kernel packaging:' 1741000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 17421da177e4SLinus Torvalds @echo '' 17431da177e4SLinus Torvalds @echo 'Documentation targets:' 1744cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 17451da177e4SLinus Torvalds @echo '' 174601dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 17475c816641SMasahiro Yamada @$(or $(archhelp),\ 174801dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 17491da177e4SLinus Torvalds @echo '' 17501da177e4SLinus Torvalds @$(if $(boards), \ 17511da177e4SLinus Torvalds $(foreach b, $(boards), \ 17524234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 17531da177e4SLinus Torvalds echo '') 17545dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 17555dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 17565dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 17575dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 17585dffbe81SSegher Boessenkool echo '') 17591da177e4SLinus Torvalds 176083d98d73SMasahiro Yamada @echo ' make V=n [targets] 1: verbose build' 17616ae4b986SMasahiro Yamada @echo ' 2: give reason for rebuild of target' 17626ae4b986SMasahiro Yamada @echo ' V=1 and V=2 can be combined with V=12' 17631da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1764a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1765a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1766701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1767af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1768e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 176928bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 177028bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 177128bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1772c77d06e7SYann Droneaud @echo ' e: warnings are being treated as errors' 1773a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 1774ec201955SRob Herring @$(if $(dtstree), \ 1775ec201955SRob Herring echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ 1776ec201955SRob Herring echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ 1777ec201955SRob Herring ) 17781da177e4SLinus Torvalds @echo '' 17791da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 17801da177e4SLinus Torvalds @echo 'For further info see the ./README file' 17811da177e4SLinus Torvalds 17821da177e4SLinus Torvalds 17835dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 17845dffbe81SSegher Boessenkool 17855dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 17865dffbe81SSegher Boessenkool 1787fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 17885dffbe81SSegher Boessenkool 17895dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 17905dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 17915dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 17925dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 17935dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 17945dffbe81SSegher Boessenkool echo '') 17955dffbe81SSegher Boessenkool 17965dffbe81SSegher Boessenkool 17971da177e4SLinus Torvalds# Documentation targets 17981da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1799e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 18001f050e90SMaxim Cournoyer linkcheckdocs dochelp refcheckdocs texinfodocs infodocs 180122cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1802bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1803cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 18041da177e4SLinus Torvalds 18052f7ab126SMiguel Ojeda 18062f7ab126SMiguel Ojeda# Rust targets 18072f7ab126SMiguel Ojeda# --------------------------------------------------------------------------- 18082f7ab126SMiguel Ojeda 18092f7ab126SMiguel Ojeda# "Is Rust available?" target 18102f7ab126SMiguel OjedaPHONY += rustavailable 18112f7ab126SMiguel Ojedarustavailable: 18122f7ab126SMiguel Ojeda $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!" 18132f7ab126SMiguel Ojeda 18142f7ab126SMiguel Ojeda# Documentation target 18152f7ab126SMiguel Ojeda# 18162f7ab126SMiguel Ojeda# Using the singular to avoid running afoul of `no-dot-config-targets`. 18172f7ab126SMiguel OjedaPHONY += rustdoc 18182f7ab126SMiguel Ojedarustdoc: prepare 18192f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 18202f7ab126SMiguel Ojeda 18212f7ab126SMiguel Ojeda# Testing target 18222f7ab126SMiguel OjedaPHONY += rusttest 18232f7ab126SMiguel Ojedarusttest: prepare 18242f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 18252f7ab126SMiguel Ojeda 18262f7ab126SMiguel Ojeda# Formatting targets 18272f7ab126SMiguel OjedaPHONY += rustfmt rustfmtcheck 18282f7ab126SMiguel Ojeda 18292f7ab126SMiguel Ojeda# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. 18302f7ab126SMiguel Ojeda# 18312f7ab126SMiguel Ojeda# We match using absolute paths since `find` does not resolve them 18322f7ab126SMiguel Ojeda# when matching, which is a problem when e.g. `srctree` is `..`. 18332f7ab126SMiguel Ojeda# We `grep` afterwards in order to remove the directory entry itself. 18342f7ab126SMiguel Ojedarustfmt: 18352f7ab126SMiguel Ojeda $(Q)find $(abs_srctree) -type f -name '*.rs' \ 18362f7ab126SMiguel Ojeda -o -path $(abs_srctree)/rust/alloc -prune \ 18372f7ab126SMiguel Ojeda -o -path $(abs_objtree)/rust/test -prune \ 18382f7ab126SMiguel Ojeda | grep -Fv $(abs_srctree)/rust/alloc \ 18392f7ab126SMiguel Ojeda | grep -Fv $(abs_objtree)/rust/test \ 18402f7ab126SMiguel Ojeda | grep -Fv generated \ 18412f7ab126SMiguel Ojeda | xargs $(RUSTFMT) $(rustfmt_flags) 18422f7ab126SMiguel Ojeda 18432f7ab126SMiguel Ojedarustfmtcheck: rustfmt_flags = --check 18442f7ab126SMiguel Ojedarustfmtcheck: rustfmt 18452f7ab126SMiguel Ojeda 18462f7ab126SMiguel Ojeda# IDE support targets 18472f7ab126SMiguel OjedaPHONY += rust-analyzer 18482f7ab126SMiguel Ojedarust-analyzer: 18492f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 18502f7ab126SMiguel Ojeda 185167274c08SMasahiro Yamada# Misc 185267274c08SMasahiro Yamada# --------------------------------------------------------------------------- 185367274c08SMasahiro Yamada 185491ecf7ffSMasahiro YamadaPHONY += misc-check 185591ecf7ffSMasahiro Yamadamisc-check: 185691ecf7ffSMasahiro Yamada $(Q)$(srctree)/scripts/misc-check 185791ecf7ffSMasahiro Yamada 185891ecf7ffSMasahiro Yamadaall: misc-check 185991ecf7ffSMasahiro Yamada 186067274c08SMasahiro YamadaPHONY += scripts_gdb 18617a739ce5SMasahiro Yamadascripts_gdb: prepare0 18621e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 18638d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 186467274c08SMasahiro Yamada 186567274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 186667274c08SMasahiro Yamadaall: scripts_gdb 186767274c08SMasahiro Yamadaendif 186867274c08SMasahiro Yamada 18691da177e4SLinus Torvaldselse # KBUILD_EXTMOD 18701da177e4SLinus Torvalds 1871c753ccb2STzafrir Cohenfilechk_kernel.release = echo $(KERNELRELEASE) 1872c753ccb2STzafrir Cohen 18731da177e4SLinus Torvalds### 18741da177e4SLinus Torvalds# External module support. 18751da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 18761da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 18771da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 187811122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used. 18791da177e4SLinus Torvalds 18806212804fSMasahiro Yamada# We are always building only modules. 18816212804fSMasahiro YamadaKBUILD_BUILTIN := 18821da177e4SLinus TorvaldsKBUILD_MODULES := 1 18831da177e4SLinus Torvalds 18845750121aSMasahiro Yamadabuild-dir := $(KBUILD_EXTMOD) 18853d32285fSMasahiro Yamada 18867f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json 18873d32285fSMasahiro YamadaPHONY += compile_commands.json 18883d32285fSMasahiro Yamada 188976cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 18903d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ 1891dc5723b0SSami Tolvanen $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache 18921da177e4SLinus Torvalds 18936072b2c4SMasahiro YamadaPHONY += prepare 18946072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations 18956072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 18966072b2c4SMasahiro Yamadaprepare: 1897129ab0d2SMasahiro Yamada @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 18986072b2c4SMasahiro Yamada echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1899129ab0d2SMasahiro Yamada echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 19006072b2c4SMasahiro Yamada echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 19016072b2c4SMasahiro Yamada fi 19026072b2c4SMasahiro Yamada 1903fe69b420SMasahiro YamadaPHONY += help 19041da177e4SLinus Torvaldshelp: 19051da177e4SLinus Torvalds @echo ' Building external modules.' 19061da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 19071da177e4SLinus Torvalds @echo '' 19081da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 19091da177e4SLinus Torvalds @echo ' modules_install - install the module' 19101da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 19111da177e4SLinus Torvalds @echo '' 191206300b21SSam Ravnborg 1913*8ae071fcSMasahiro Yamada__external_modules_error: 1914*8ae071fcSMasahiro Yamada @echo >&2 '***' 1915*8ae071fcSMasahiro Yamada @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' 1916*8ae071fcSMasahiro Yamada @echo >&2 '*** You cannot build or install external modules.' 1917*8ae071fcSMasahiro Yamada @echo >&2 '***' 1918*8ae071fcSMasahiro Yamada @false 1919*8ae071fcSMasahiro Yamada 19201da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 19211da177e4SLinus Torvalds 19223e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 19233e3005dfSMasahiro Yamada# Modules 19243e3005dfSMasahiro Yamada 19257f371813SMasahiro YamadaPHONY += modules modules_install modules_prepare 19263e3005dfSMasahiro Yamada 19273e3005dfSMasahiro Yamadaifdef CONFIG_MODULES 19283e3005dfSMasahiro Yamada 19295750121aSMasahiro Yamada$(MODORDER): $(build-dir) 19305750121aSMasahiro Yamada @: 19315750121aSMasahiro Yamada 1932f73edc89SMasahiro Yamada# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. 1933f73edc89SMasahiro Yamada# This is solely useful to speed up test compiles. 1934f73edc89SMasahiro Yamadamodules: modpost 1935f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1) 1936f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 1937f73edc89SMasahiro Yamadaendif 19383e3005dfSMasahiro Yamada 19391a998be6SMasahiro YamadaPHONY += modules_check 19401a998be6SMasahiro Yamadamodules_check: $(MODORDER) 19411a998be6SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 19421a998be6SMasahiro Yamada 19433ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD $(MODLIB) 19443e3005dfSMasahiro Yamada cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 19453e3005dfSMasahiro Yamada $(KERNELRELEASE) 19463e3005dfSMasahiro Yamada 19473e3005dfSMasahiro Yamadamodules_install: 19483e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 19493e3005dfSMasahiro Yamada $(call cmd,depmod) 19503e3005dfSMasahiro Yamada 19513e3005dfSMasahiro Yamadaelse # CONFIG_MODULES 19523e3005dfSMasahiro Yamada 19533e3005dfSMasahiro Yamada# Modules not configured 19543e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 19553e3005dfSMasahiro Yamada 1956*8ae071fcSMasahiro YamadaPHONY += __external_modules_error 1957*8ae071fcSMasahiro Yamada 1958*8ae071fcSMasahiro Yamadamodules modules_install: __external_modules_error 1959*8ae071fcSMasahiro Yamada @: 19603e3005dfSMasahiro Yamada 1961f110e5a2SMasahiro YamadaKBUILD_MODULES := 1962f110e5a2SMasahiro Yamada 19633e3005dfSMasahiro Yamadaendif # CONFIG_MODULES 19643e3005dfSMasahiro Yamada 1965f73edc89SMasahiro YamadaPHONY += modpost 1966f73edc89SMasahiro Yamadamodpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ 1967f73edc89SMasahiro Yamada $(if $(KBUILD_MODULES), modules_check) 1968f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1969f73edc89SMasahiro Yamada 1970b1fbfcb4SMasahiro Yamada# Single targets 1971b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1972b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1973b1fbfcb4SMasahiro Yamada# 1974b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1975b1fbfcb4SMasahiro Yamada# 1976b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1977b1fbfcb4SMasahiro Yamada# 1978b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1979b1fbfcb4SMasahiro Yamada# 1980b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1981b1fbfcb4SMasahiro Yamada 1982b1fbfcb4SMasahiro Yamadaifdef single-build 1983b1fbfcb4SMasahiro Yamada 1984b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1985b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1986fc93a4cdSMasahiro Yamadasingle-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 1987fc93a4cdSMasahiro Yamada $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 1988b1fbfcb4SMasahiro Yamada 1989f73edc89SMasahiro Yamada$(single-ko): single_modules 1990b1fbfcb4SMasahiro Yamada @: 19915750121aSMasahiro Yamada$(single-no-ko): $(build-dir) 1992b1fbfcb4SMasahiro Yamada @: 1993b1fbfcb4SMasahiro Yamada 1994f110e5a2SMasahiro Yamada# Remove MODORDER when done because it is not the real one. 1995f73edc89SMasahiro YamadaPHONY += single_modules 1996f73edc89SMasahiro Yamadasingle_modules: $(single-no-ko) modules_prepare 1997a53da43dSMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER) 1998b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1999f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1) 2000f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 2001f73edc89SMasahiro Yamadaendif 2002f110e5a2SMasahiro Yamada $(Q)rm -f $(MODORDER) 2003b1fbfcb4SMasahiro Yamada 20045750121aSMasahiro Yamadasingle-goals := $(addprefix $(build-dir)/, $(single-no-ko)) 2005b1fbfcb4SMasahiro Yamada 20063753af77SMasahiro YamadaKBUILD_MODULES := 1 20073753af77SMasahiro Yamada 2008b1fbfcb4SMasahiro Yamadaendif 2009b1fbfcb4SMasahiro Yamada 2010c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 2011c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 2012c99f3918SMasahiro Yamada# make menuconfig etc. 2013c99f3918SMasahiro Yamada# Error messages still appears in the original language 20145750121aSMasahiro YamadaPHONY += $(build-dir) 20155750121aSMasahiro Yamada$(build-dir): prepare 20165750121aSMasahiro Yamada $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) 2017c99f3918SMasahiro Yamada 201876cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 201976cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 202076cd306dSMasahiro Yamada$(clean-dirs): 202176cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 202276cd306dSMasahiro Yamada 202388d7be03SMichal Marekclean: $(clean-dirs) 202488d7be03SMichal Marek $(call cmd,rmfiles) 20255c816641SMasahiro Yamada @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 20262f7ab126SMiguel Ojeda \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ 20274f0e3a57SRob Herring -o -name '*.ko.*' \ 2028dcad240cSAndrew Davis -o -name '*.dtb' -o -name '*.dtbo' \ 2029dcad240cSAndrew Davis -o -name '*.dtb.S' -o -name '*.dtbo.S' \ 2030dcad240cSAndrew Davis -o -name '*.dt.yaml' \ 2031ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 20325e9e95ccSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 203388d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 20349a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 20354fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 203688d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 20376b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 2038433db3e2SVinÃcius Tinti -o -name '*.ll' \ 203938e89184SSami Tolvanen -o -name '*.gcno' \ 20409c73bcfaSThomas Weißschuh -o -name '*.*.symversions' \) -type f -print \ 20419c73bcfaSThomas Weißschuh -o -name '.tmp_*' -print \ 20429c73bcfaSThomas Weißschuh | xargs rm -rf 204388d7be03SMichal Marek 20441da177e4SLinus Torvalds# Generate tags for editors 20451da177e4SLinus Torvalds# --------------------------------------------------------------------------- 2046a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 2047858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 20481da177e4SLinus Torvalds 2049f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 20501da177e4SLinus Torvalds $(call cmd,tags) 20511da177e4SLinus Torvalds 2052eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 2053eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 2054eb8305aeSMatthias Maennich 2055eb8305aeSMatthias MaennichPHONY += nsdeps 2056bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 2057eb8305aeSMatthias Maennichnsdeps: modules 2058bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 2059eb8305aeSMatthias Maennich 20603d32285fSMasahiro Yamada# Clang Tooling 20613d32285fSMasahiro Yamada# --------------------------------------------------------------------------- 20623d32285fSMasahiro Yamada 20633d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN $@ 20643d32285fSMasahiro Yamada cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 20653d32285fSMasahiro Yamada 20667f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ 206732164845SMasahiro Yamada $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ 20683d32285fSMasahiro Yamada $(if $(CONFIG_MODULES), $(MODORDER)) FORCE 20693d32285fSMasahiro Yamada $(call if_changed,gen_compile_commands) 20703d32285fSMasahiro Yamada 20717f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json 20723d32285fSMasahiro Yamada 20736ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer 20746ad7cbc0SNathan Huckleberry 20756ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG 20766ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK $< 20776ad7cbc0SNathan Huckleberry cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 20786ad7cbc0SNathan Huckleberry 20797f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json 20806ad7cbc0SNathan Huckleberry $(call cmd,clang_tools) 20816ad7cbc0SNathan Huckleberryelse 20826ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer: 20836ad7cbc0SNathan Huckleberry @echo "$@ requires CC=clang" >&2 20846ad7cbc0SNathan Huckleberry @false 20856ad7cbc0SNathan Huckleberryendif 20866ad7cbc0SNathan Huckleberry 20871da177e4SLinus Torvalds# Scripts to check various things for consistency 20881da177e4SLinus Torvalds# --------------------------------------------------------------------------- 20891da177e4SLinus Torvalds 20907dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report 2091279f3dd3SPeter Foley 20921da177e4SLinus Torvaldsincludecheck: 2093436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 20941da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 209580007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 20961da177e4SLinus Torvalds 20971da177e4SLinus Torvaldsversioncheck: 20982ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 20991da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 210080007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 21011da177e4SLinus Torvalds 210274425eeeSNicolas Palixcoccicheck: 2103858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 210474425eeeSNicolas Palix 2105295ac051SAdrian Bunkexport_report: 2106295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 2107295ac051SAdrian Bunk 2108c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 2109e3ccf6e3SJeff Dike 2110011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 2111011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2112011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 2113011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 2114011e3a9aSJeff Dikeifeq ($(ARCH), um) 2115011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 2116011e3a9aSJeff Dikeelse 2117011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 2118011e3a9aSJeff Dikeendif 21191da177e4SLinus Torvaldscheckstack: 21201da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 212175dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 21221da177e4SLinus Torvalds 21237b8ea53dSAmerigo Wangkernelrelease: 21241cb86b6cSMasahiro Yamada @$(filechk_kernel.release) 212501ab1788SAmerigo Wang 2126cb58455cSSam Ravnborgkernelversion: 21272244cbd8SSam Ravnborg @echo $(KERNELVERSION) 21281da177e4SLinus Torvalds 2129c398ff00SMike Marciniszynimage_name: 2130c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 2131c398ff00SMike Marciniszyn 21321da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 21330663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 21341da177e4SLinus Torvalds 2135392885eeSMasahiro Yamada# read saved command lines for existing targets 2136392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 21371da177e4SLinus Torvalds 2138b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 21391da177e4SLinus Torvalds 214046b7c492SSZ Lin (林上智)endif # config-build 21412042b548SMasahiro Yamadaendif # mixed-build 2142688931a5SMasahiro Yamadaendif # need-sub-make 21431da177e4SLinus Torvalds 21444f193362SPaul SmithPHONY += FORCE 21451da177e4SLinus TorvaldsFORCE: 21464f193362SPaul Smith 2147bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 2148fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 21494f193362SPaul Smith.PHONY: $(PHONY) 2150