1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2568035b0SLinus TorvaldsVERSION = 6 306c2afb8SLinus TorvaldsPATCHLEVEL = 5 455922c9dSLinus TorvaldsSUBLEVEL = 0 506c2afb8SLinus TorvaldsEXTRAVERSION = -rc1 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 415fa94cebSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 425fa94cebSMasahiro Yamadaexport abs_srctree := $(realpath $(dir $(this-makefile))) 435fa94cebSMasahiro Yamadaexport abs_objtree := $(CURDIR) 445fa94cebSMasahiro Yamada 45221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 463812b8c5SMasahiro Yamada 473812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 483812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 493812b8c5SMasahiro YamadaMAKEFLAGS += -rR 503812b8c5SMasahiro Yamada 513812b8c5SMasahiro Yamada# Avoid funny character set dependencies 523812b8c5SMasahiro Yamadaunexport LC_ALL 533812b8c5SMasahiro YamadaLC_COLLATE=C 543812b8c5SMasahiro YamadaLC_NUMERIC=C 553812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 563812b8c5SMasahiro Yamada 573812b8c5SMasahiro Yamada# Avoid interference with shell env settings 583812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 593812b8c5SMasahiro Yamada 60066b7ed9SMichal Marek# Beautify output 61066b7ed9SMichal Marek# --------------------------------------------------------------------------- 62066b7ed9SMichal Marek# 638962b6b4SMasahiro Yamada# Most of build commands in Kbuild start with "cmd_". You can optionally define 648962b6b4SMasahiro Yamada# "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from 658962b6b4SMasahiro Yamada# that command is printed by default. 66066b7ed9SMichal Marek# 678962b6b4SMasahiro Yamada# e.g.) 688962b6b4SMasahiro Yamada# quiet_cmd_depmod = DEPMOD $(MODLIB) 698962b6b4SMasahiro Yamada# cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE) 70066b7ed9SMichal Marek# 71066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 72066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 73066b7ed9SMichal Marek# 748962b6b4SMasahiro Yamada# $(Q)$(MAKE) $(build)=scripts/basic 75066b7ed9SMichal Marek# 766ae4b986SMasahiro Yamada# If KBUILD_VERBOSE contains 1, the whole command is echoed. 776ae4b986SMasahiro Yamada# If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed. 78066b7ed9SMichal Marek# 791da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 801da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 811da177e4SLinus Torvalds 821da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 831da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 841da177e4SLinus Torvaldsendif 851da177e4SLinus Torvalds 86066b7ed9SMichal Marekquiet = quiet_ 87066b7ed9SMichal MarekQ = @ 886ae4b986SMasahiro Yamada 896ae4b986SMasahiro Yamadaifneq ($(findstring 1, $(KBUILD_VERBOSE)),) 906ae4b986SMasahiro Yamada quiet = 916ae4b986SMasahiro Yamada Q = 92066b7ed9SMichal Marekendif 93066b7ed9SMichal Marek 94066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 95066b7ed9SMichal Marek# commands 964bf73588SDmitry Goncharov# make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS. 97066b7ed9SMichal Marek 984bf73588SDmitry Goncharovifeq ($(filter 3.%,$(MAKE_VERSION)),) 99fc5d57a9SMasahiro Yamadashort-opts := $(firstword -$(MAKEFLAGS)) 1004bf73588SDmitry Goncharovelse 101fc5d57a9SMasahiro Yamadashort-opts := $(filter-out --%,$(MAKEFLAGS)) 1024bf73588SDmitry Goncharovendif 1034bf73588SDmitry Goncharov 104fc5d57a9SMasahiro Yamadaifneq ($(findstring s,$(short-opts)),) 105066b7ed9SMichal Marekquiet=silent_ 10683d98d73SMasahiro Yamadaoverride KBUILD_VERBOSE := 107066b7ed9SMichal Marekendif 108066b7ed9SMichal Marek 109066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 110066b7ed9SMichal Marek 111bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 112bcf637f5SMasahiro Yamada# C compilation. 113bcf637f5SMasahiro Yamada# 114bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 115bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 116bcf637f5SMasahiro Yamada# of whether they are re-compiled or not. 117bcf637f5SMasahiro Yamada# 118bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details, 119bcf637f5SMasahiro Yamada# including where to get the "sparse" utility. 120bcf637f5SMasahiro Yamada 121bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line") 122bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = $(C) 123bcf637f5SMasahiro Yamadaendif 124bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC 125bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = 0 126bcf637f5SMasahiro Yamadaendif 127bcf637f5SMasahiro Yamada 128bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC 129bcf637f5SMasahiro Yamada 1302f7ab126SMiguel Ojeda# Enable "clippy" (a linter) as part of the Rust compilation. 1312f7ab126SMiguel Ojeda# 1322f7ab126SMiguel Ojeda# Use 'make CLIPPY=1' to enable it. 1332f7ab126SMiguel Ojedaifeq ("$(origin CLIPPY)", "command line") 1342f7ab126SMiguel Ojeda KBUILD_CLIPPY := $(CLIPPY) 1352f7ab126SMiguel Ojedaendif 1362f7ab126SMiguel Ojeda 1372f7ab126SMiguel Ojedaexport KBUILD_CLIPPY 1382f7ab126SMiguel Ojeda 139bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 140bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 141bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line") 142bcf637f5SMasahiro Yamada KBUILD_EXTMOD := $(M) 143bcf637f5SMasahiro Yamadaendif 144bcf637f5SMasahiro Yamada 145bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \ 146bcf637f5SMasahiro Yamada $(error building multiple external modules is not supported)) 147bcf637f5SMasahiro Yamada 1489a68fd7fSMasahiro Yamada$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ 1499a68fd7fSMasahiro Yamada $(error module directory path cannot contain '$x'))) 1509a68fd7fSMasahiro Yamada 15174ee585bSMasahiro Yamada# Remove trailing slashes 15274ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),) 15374ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) 15474ee585bSMasahiro Yamadaendif 15574ee585bSMasahiro Yamada 156bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD 157bcf637f5SMasahiro Yamada 15825b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 15925b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 16025b146c5SMasahiro Yamada# 16125b146c5SMasahiro Yamada# For example, you can do this: 16225b146c5SMasahiro Yamada# 16325b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 16425b146c5SMasahiro Yamada# 16525b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 16625b146c5SMasahiro Yamada# two syntaxes to specify it. 16725b146c5SMasahiro Yamada# 1681da177e4SLinus Torvalds# 1) O= 1691da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1701da177e4SLinus Torvalds# 1711da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 17225b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 17325b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1741da177e4SLinus Torvalds# 1751da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1761da177e4SLinus Torvalds# variable. 1771da177e4SLinus Torvalds 17825b146c5SMasahiro Yamada# Do we want to change the working directory? 1791da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1801da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1811da177e4SLinus Torvaldsendif 1821da177e4SLinus Torvalds 18325b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 18425b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 18525b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 18625b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 18725b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 18825b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 18925b146c5SMasahiro Yamada 19025b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 19125b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 19225b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 19325b146c5SMasahiro Yamada 19425b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 19525b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 19625b146c5SMasahiro Yamadaendif 19725b146c5SMasahiro Yamada 198688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 199688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 200688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 201688931a5SMasahiro Yamadaneed-sub-make := 1 202688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 20393fdddfeSMasahiro Yamada$(this-makefile): ; 204688931a5SMasahiro Yamadaendif 205688931a5SMasahiro Yamada 206221cc2d2SMasahiro Yamadaexport sub_make_done := 1 207221cc2d2SMasahiro Yamada 2085fc10e76SMasahiro Yamadaendif # sub_make_done 2095fc10e76SMasahiro Yamada 2105fc10e76SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 2115fc10e76SMasahiro Yamada# Suppress "Entering directory ..." if we are at the final work directory. 2125fc10e76SMasahiro Yamadano-print-directory := --no-print-directory 2135fc10e76SMasahiro Yamadaelse 2145fc10e76SMasahiro Yamada# Recursion to show "Entering directory ..." 2155fc10e76SMasahiro Yamadaneed-sub-make := 1 2165fc10e76SMasahiro Yamadaendif 2175fc10e76SMasahiro Yamada 2185fc10e76SMasahiro Yamadaifeq ($(filter --no-print-directory, $(MAKEFLAGS)),) 2195fc10e76SMasahiro Yamada# If --no-print-directory is unset, recurse once again to set it. 2205fc10e76SMasahiro Yamada# You may end up recursing into __sub-make twice. This is needed due to the 2215fc10e76SMasahiro Yamada# behavior change in GNU Make 4.4.1. 2225fc10e76SMasahiro Yamadaneed-sub-make := 1 2235fc10e76SMasahiro Yamadaendif 2245fc10e76SMasahiro Yamada 225688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 226688931a5SMasahiro Yamada 227121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 2280b35786dSMilton Miller 229121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 23016f89098SCharles Keepax @: 2310b35786dSMilton Miller 232c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 233121c2a13SMasahiro Yamada__sub-make: 2345fc10e76SMasahiro Yamada $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \ 2355fc10e76SMasahiro Yamada -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 2361da177e4SLinus Torvalds 2375fc10e76SMasahiro Yamadaelse # need-sub-make 238688931a5SMasahiro Yamada 2391da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 2407ff52571SMasahiro Yamada 24125b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2429da0763bSMichal Marek # building in the source tree 2439da0763bSMichal Marek srctree := . 244051f278eSMasahiro Yamada building_out_of_srctree := 2459da0763bSMichal Marekelse 24625b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2479da0763bSMichal Marek # building in a subdirectory of the source tree 2489da0763bSMichal Marek srctree := .. 2499da0763bSMichal Marek else 25025b146c5SMasahiro Yamada srctree := $(abs_srctree) 2519da0763bSMichal Marek endif 252051f278eSMasahiro Yamada building_out_of_srctree := 1 2539da0763bSMichal Marekendif 2542c1f4f12SMasahiro Yamada 25595fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 25695fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 25795fd3f87SMasahiro Yamadaendif 2582c1f4f12SMasahiro Yamada 2597e1c0477SMichal Marekobjtree := . 2606b12de69SMasahiro YamadaVPATH := $(srctree) 2611da177e4SLinus Torvalds 262051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2631da177e4SLinus Torvalds 2642c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2652c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2662c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2672c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2682c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2692c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2702c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2712c1f4f12SMasahiro Yamada 2722c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2732c1f4f12SMasahiro Yamada 27422340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 27522340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2762c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 27759b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2784623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 27905e96e96SMasahiro Yamada outputmakefile rustavailable rustfmt rustfmtcheck 280805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install 281805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed. 282805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \ 283805b2e1dSMasahiro Yamada headers_install modules_install kernelrelease image_name 284993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ 285993bdde9SMasahiro Yamada image_name 286aa4847dbSMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/ 2872c1f4f12SMasahiro Yamada 2882042b548SMasahiro Yamadaconfig-build := 2892042b548SMasahiro Yamadamixed-build := 2902042b548SMasahiro Yamadaneed-config := 1 291805b2e1dSMasahiro Yamadaneed-compiler := 1 292d7942413SMasahiro Yamadamay-sync-config := 1 293394053f4SMasahiro Yamadasingle-build := 2942c1f4f12SMasahiro Yamada 2952c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2962c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2972042b548SMasahiro Yamada need-config := 2982c1f4f12SMasahiro Yamada endif 2992c1f4f12SMasahiro Yamadaendif 3002c1f4f12SMasahiro Yamada 301805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) 302805b2e1dSMasahiro Yamada ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) 303805b2e1dSMasahiro Yamada need-compiler := 304805b2e1dSMasahiro Yamada endif 305805b2e1dSMasahiro Yamadaendif 306805b2e1dSMasahiro Yamada 307d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 308d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 3092042b548SMasahiro Yamada may-sync-config := 310d7942413SMasahiro Yamada endif 311d7942413SMasahiro Yamadaendif 312d7942413SMasahiro Yamada 313d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 3142042b548SMasahiro Yamada may-sync-config := 315d7942413SMasahiro Yamadaendif 316d7942413SMasahiro Yamada 3172c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 318efbf9726SMasahiro Yamada ifneq ($(filter %config,$(MAKECMDGOALS)),) 3192042b548SMasahiro Yamada config-build := 1 3202c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 3212042b548SMasahiro Yamada mixed-build := 1 3222c1f4f12SMasahiro Yamada endif 3232c1f4f12SMasahiro Yamada endif 3242c1f4f12SMasahiro Yamadaendif 32522340a06SMasahiro Yamada 326394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 327394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 328394053f4SMasahiro Yamada single-build := 1 329394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 330394053f4SMasahiro Yamada mixed-build := 1 331394053f4SMasahiro Yamada endif 332394053f4SMasahiro Yamadaendif 333394053f4SMasahiro Yamada 33422340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 33522340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 33622340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3372042b548SMasahiro Yamada mixed-build := 1 33822340a06SMasahiro Yamada endif 33922340a06SMasahiro Yamadaendif 34022340a06SMasahiro Yamada 3412c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3422c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3432c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3442042b548SMasahiro Yamada mixed-build := 1 3452c1f4f12SMasahiro Yamada endif 3462c1f4f12SMasahiro Yamadaendif 3472c1f4f12SMasahiro Yamada 3482042b548SMasahiro Yamadaifdef mixed-build 3492c1f4f12SMasahiro Yamada# =========================================================================== 3502c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3512c1f4f12SMasahiro Yamada# Handle them one by one. 3522c1f4f12SMasahiro Yamada 3532c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3542c1f4f12SMasahiro Yamada 355121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 3562c1f4f12SMasahiro Yamada @: 3572c1f4f12SMasahiro Yamada 3582c1f4f12SMasahiro Yamada__build_one_by_one: 3592c1f4f12SMasahiro Yamada $(Q)set -e; \ 3602c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3612c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3622c1f4f12SMasahiro Yamada done 3632c1f4f12SMasahiro Yamada 3642042b548SMasahiro Yamadaelse # !mixed-build 3652c1f4f12SMasahiro Yamada 3663204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include 3672c1f4f12SMasahiro Yamada 3682c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3696768fa4bSMasahiro YamadaKERNELRELEASE = $(call read-file, include/config/kernel.release) 3702c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3712c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3722c1f4f12SMasahiro Yamada 3733204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3761da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3771da177e4SLinus Torvalds# 3781da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3791da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3801da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3811da177e4SLinus Torvalds# make ARCH=ia64 3821da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3831da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3861da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3871da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3881da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3891da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3901da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3911da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3921da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3932331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds# Architecture as present in compile.h 3961da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3976752ed90SThomas GleixnerSRCARCH := $(ARCH) 3981da177e4SLinus Torvalds 399d746d647SSam Ravnborg# Additional ARCH settings for x86 400d746d647SSam Ravnborgifeq ($(ARCH),i386) 401d746d647SSam Ravnborg SRCARCH := x86 402d746d647SSam Ravnborgendif 403d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 404d746d647SSam Ravnborg SRCARCH := x86 405d746d647SSam Ravnborgendif 40674b469f2SSam Ravnborg 4075e538790SSam Ravnborg# Additional ARCH settings for sparc 408e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 409e69f58c0SNamhyung Kim SRCARCH := sparc 410e69f58c0SNamhyung Kimendif 411a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 4125e538790SSam Ravnborg SRCARCH := sparc 413a439fe51SSam Ravnborgendif 4142fb9b1bdSSam Ravnborg 4155f6e0fe0SMasahiro Yamada# Additional ARCH settings for parisc 4165f6e0fe0SMasahiro Yamadaifeq ($(ARCH),parisc64) 4175f6e0fe0SMasahiro Yamada SRCARCH := parisc 4185f6e0fe0SMasahiro Yamadaendif 4195f6e0fe0SMasahiro Yamada 420f02aa48dSMasahiro Yamadaexport cross_compiling := 421f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH)) 422f02aa48dSMasahiro Yamadacross_compiling := 1 423f02aa48dSMasahiro Yamadaendif 424f02aa48dSMasahiro Yamada 42514cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 42641263fc6SBen Gardinerexport KCONFIG_CONFIG 42714cdd3c4SRoman Zippel 4281da177e4SLinus Torvalds# SHELL used by kbuild 429858805b3SMasahiro YamadaCONFIG_SHELL := sh 4301da177e4SLinus Torvalds 4316d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4326d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4336d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 434d7f14c66SUwe Kleine-König 435a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 436e9c28192SNathan Chancellorifneq ($(filter %/,$(LLVM)),) 437e9c28192SNathan ChancellorLLVM_PREFIX := $(LLVM) 438e9c28192SNathan Chancellorelse ifneq ($(filter -%,$(LLVM)),) 439e9c28192SNathan ChancellorLLVM_SUFFIX := $(LLVM) 440e9c28192SNathan Chancellorendif 441e9c28192SNathan Chancellor 442e9c28192SNathan ChancellorHOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 443e9c28192SNathan ChancellorHOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 444a0d1c951SMasahiro Yamadaelse 4451da177e4SLinus TorvaldsHOSTCC = gcc 4461da177e4SLinus TorvaldsHOSTCXX = g++ 447a0d1c951SMasahiro Yamadaendif 4482f7ab126SMiguel OjedaHOSTRUSTC = rustc 449d5ea4fecSChun-Tse ShaoHOSTPKG_CONFIG = pkg-config 4507f3a59dbSMasahiro Yamada 451f67695c9SElliot BermanKBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 452b5ec6fd2SPeter Zijlstra -O2 -fomit-frame-pointer -std=gnu11 453f67695c9SElliot BermanKBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) 454f67695c9SElliot BermanKBUILD_USERLDFLAGS := $(USERLDFLAGS) 4557f3a59dbSMasahiro Yamada 4562f7ab126SMiguel Ojeda# These flags apply to all Rust code in the tree, including the kernel and 4572f7ab126SMiguel Ojeda# host programs. 4582f7ab126SMiguel Ojedaexport rust_common_flags := --edition=2021 \ 4592f7ab126SMiguel Ojeda -Zbinary_dep_depinfo=y \ 4602f7ab126SMiguel Ojeda -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \ 4612f7ab126SMiguel Ojeda -Dunreachable_pub -Dnon_ascii_idents \ 4622f7ab126SMiguel Ojeda -Wmissing_docs \ 4632f7ab126SMiguel Ojeda -Drustdoc::missing_crate_level_docs \ 4642f7ab126SMiguel Ojeda -Dclippy::correctness -Dclippy::style \ 4652f7ab126SMiguel Ojeda -Dclippy::suspicious -Dclippy::complexity \ 4662f7ab126SMiguel Ojeda -Dclippy::perf \ 4672f7ab126SMiguel Ojeda -Dclippy::let_unit_value -Dclippy::mut_mut \ 4682f7ab126SMiguel Ojeda -Dclippy::needless_bitwise_bool \ 4692f7ab126SMiguel Ojeda -Dclippy::needless_continue \ 4702f7ab126SMiguel Ojeda -Wclippy::dbg_macro 4712f7ab126SMiguel Ojeda 472f67695c9SElliot BermanKBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 473735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 4742f7ab126SMiguel OjedaKBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ 4752f7ab126SMiguel Ojeda -Zallow-features= $(HOSTRUSTFLAGS) 476f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 477f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds# Make variables (CC, etc...) 4801da177e4SLinus TorvaldsCPP = $(CC) -E 481a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 482e9c28192SNathan ChancellorCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 483e9c28192SNathan ChancellorLD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 484e9c28192SNathan ChancellorAR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 485e9c28192SNathan ChancellorNM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 486e9c28192SNathan ChancellorOBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 487e9c28192SNathan ChancellorOBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 488e9c28192SNathan ChancellorREADELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 489e9c28192SNathan ChancellorSTRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 490a0d1c951SMasahiro Yamadaelse 491a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 492a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 4931da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4941da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4951da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4961da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 497eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 498a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 499a0d1c951SMasahiro Yamadaendif 5002f7ab126SMiguel OjedaRUSTC = rustc 5012f7ab126SMiguel OjedaRUSTDOC = rustdoc 5022f7ab126SMiguel OjedaRUSTFMT = rustfmt 5032f7ab126SMiguel OjedaCLIPPY_DRIVER = clippy-driver 5042f7ab126SMiguel OjedaBINDGEN = bindgen 5052f7ab126SMiguel OjedaCARGO = cargo 506e83b9f55SAndrii NakryikoPAHOLE = pahole 507c9a0f3b8SJiri OlsaRESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 50873a4f6dbSMasahiro YamadaLEX = flex 50973a4f6dbSMasahiro YamadaYACC = bison 5101da177e4SLinus TorvaldsAWK = awk 511caa27b66SSam RavnborgINSTALLKERNEL := installkernel 512436e980eSDominique MartinetDEPMOD = depmod 5131da177e4SLinus TorvaldsPERL = perl 514e9781b52SMasahiro YamadaPYTHON3 = python3 5151da177e4SLinus TorvaldsCHECK = sparse 516858805b3SMasahiro YamadaBASH = bash 517e4a42c82SDenis EfremovKGZIP = gzip 518e4a42c82SDenis EfremovKBZIP2 = bzip2 519e4a42c82SDenis EfremovKLZOP = lzop 5208dfb61dcSDenis EfremovLZMA = lzma 5218dfb61dcSDenis EfremovLZ4 = lz4c 5228dfb61dcSDenis EfremovXZ = xz 52348f7ddf7SNick TerrellZSTD = zstd 5248dfb61dcSDenis Efremov 5259741e07eSJiri OlsaPAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) 5269741e07eSJiri Olsa 52780a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 5286c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 5290c22be07SDouglas AndersonNOSTDINC_FLAGS := 5306588169dSSam RavnborgCFLAGS_MODULE = 5312f7ab126SMiguel OjedaRUSTFLAGS_MODULE = 5326588169dSSam RavnborgAFLAGS_MODULE = 5336588169dSSam RavnborgLDFLAGS_MODULE = 5341da177e4SLinus TorvaldsCFLAGS_KERNEL = 5352f7ab126SMiguel OjedaRUSTFLAGS_KERNEL = 5361da177e4SLinus TorvaldsAFLAGS_KERNEL = 5378debed3eSMasahiro YamadaLDFLAGS_vmlinux = 5381da177e4SLinus Torvalds 539abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 540abbf1590SDavid HowellsUSERINCLUDE := \ 5419d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 5429d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 543abbf1590SDavid Howells -I$(srctree)/include/uapi \ 5443308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 545ce6ed1c4SMasahiro Yamada -include $(srctree)/include/linux/compiler-version.h \ 546abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 547abbf1590SDavid Howells 5481da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 5491da177e4SLinus Torvalds# Needed to be compatible with the O= option 550abbf1590SDavid HowellsLINUXINCLUDE := \ 5519d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 5529d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 553051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 554f8224f7fSMasahiro Yamada -I$(objtree)/include \ 555f8224f7fSMasahiro Yamada $(USERINCLUDE) 5561da177e4SLinus Torvalds 55742a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 558*0817d259SAlexey Dobriyan 559*0817d259SAlexey DobriyanKBUILD_CFLAGS := 560*0817d259SAlexey DobriyanKBUILD_CFLAGS += -std=gnu11 561*0817d259SAlexey DobriyanKBUILD_CFLAGS += -fshort-wchar 562*0817d259SAlexey DobriyanKBUILD_CFLAGS += -funsigned-char 563*0817d259SAlexey DobriyanKBUILD_CFLAGS += -fno-common 564*0817d259SAlexey DobriyanKBUILD_CFLAGS += -fno-PIE 565*0817d259SAlexey DobriyanKBUILD_CFLAGS += -fno-strict-aliasing 566*0817d259SAlexey DobriyanKBUILD_CFLAGS += -Wall 567*0817d259SAlexey DobriyanKBUILD_CFLAGS += -Wundef 568*0817d259SAlexey DobriyanKBUILD_CFLAGS += -Werror=implicit-function-declaration 569*0817d259SAlexey DobriyanKBUILD_CFLAGS += -Werror=implicit-int 570*0817d259SAlexey DobriyanKBUILD_CFLAGS += -Werror=return-type 571*0817d259SAlexey DobriyanKBUILD_CFLAGS += -Werror=strict-prototypes 572*0817d259SAlexey DobriyanKBUILD_CFLAGS += -Wno-format-security 573*0817d259SAlexey DobriyanKBUILD_CFLAGS += -Wno-trigraphs 574*0817d259SAlexey Dobriyan 575433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 5762f7ab126SMiguel OjedaKBUILD_RUSTFLAGS := $(rust_common_flags) \ 577c83b16ceSMasahiro Yamada --target=$(objtree)/scripts/target.json \ 5782f7ab126SMiguel Ojeda -Cpanic=abort -Cembed-bitcode=n -Clto=n \ 5792f7ab126SMiguel Ojeda -Cforce-unwind-tables=n -Ccodegen-units=1 \ 5802f7ab126SMiguel Ojeda -Csymbol-mangling-version=v0 \ 5812f7ab126SMiguel Ojeda -Crelocation-model=static \ 5822f7ab126SMiguel Ojeda -Zfunction-sections=n \ 5832f7ab126SMiguel Ojeda -Dclippy::float_arithmetic 5842f7ab126SMiguel Ojeda 58580c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 58680c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 5872f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL := 5886588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 5896588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 5902f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_MODULE := --cfg MODULE 59110df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 592d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 5935241ab4cSMasahiro YamadaCLANG_FLAGS := 5941da177e4SLinus Torvalds 5952f7ab126SMiguel Ojedaifeq ($(KBUILD_CLIPPY),1) 5962f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY_QUIET := CLIPPY 5972f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 5982f7ab126SMiguel Ojedaelse 5992f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY_QUIET := RUSTC 6002f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY = $(RUSTC) 6012f7ab126SMiguel Ojedaendif 6022f7ab126SMiguel Ojeda 6032f7ab126SMiguel Ojedaifdef RUST_LIB_SRC 6042f7ab126SMiguel Ojeda export RUST_LIB_SRC 6052f7ab126SMiguel Ojedaendif 6062f7ab126SMiguel Ojeda 6072f7ab126SMiguel Ojeda# Allows the usage of unstable features in stable compilers. 6082f7ab126SMiguel Ojedaexport RUSTC_BOOTSTRAP := 1 6092f7ab126SMiguel Ojeda 610d5ea4fecSChun-Tse Shaoexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 6112f7ab126SMiguel Ojedaexport RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO 6122f7ab126SMiguel Ojedaexport HOSTRUSTC KBUILD_HOSTRUSTFLAGS 613d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 614d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 61548f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 6167bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 617f67695c9SElliot Bermanexport KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 6181da177e4SLinus Torvalds 619d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 6200e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 6212f7ab126SMiguel Ojedaexport KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE 622222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 6232f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE 6242f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL 6259741e07eSJiri Olsaexport PAHOLE_FLAGS 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds# Files to ignore in find ... statements 6281da177e4SLinus Torvalds 629ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 630ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 631ae63b2d7SPrarit Bhargava -prune -o 632450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 633450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds# =========================================================================== 6361da177e4SLinus Torvalds# Rules shared between *config targets and build targets 6371da177e4SLinus Torvalds 638312a3d09SCao jin# Basic helpers built in scripts/basic/ 6394f193362SPaul SmithPHONY += scripts_basic 6401da177e4SLinus Torvaldsscripts_basic: 6411da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 6421da177e4SLinus Torvalds 6434f193362SPaul SmithPHONY += outputmakefile 6442728fcfaSMasahiro Yamadaifdef building_out_of_srctree 645e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 646fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 647fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 648fd5f0cd6SJan Beulich# output directory. 6493a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 6503a51ff34SVladimir Kondratiev# ignore whole output directory 6512728fcfaSMasahiro Yamada 6522728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN Makefile 6532728fcfaSMasahiro Yamada cmd_makefile = { \ 6542728fcfaSMasahiro Yamada echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ 6552728fcfaSMasahiro Yamada echo "include $(srctree)/Makefile"; \ 6562728fcfaSMasahiro Yamada } > Makefile 6572728fcfaSMasahiro Yamada 6581da177e4SLinus Torvaldsoutputmakefile: 6594b098659SMasahiro Yamada @if [ -f $(srctree)/.config -o \ 660e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 661e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 662e8e83a23SMasahiro Yamada echo >&2 "***"; \ 663e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 664e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 665e8e83a23SMasahiro Yamada echo >&2 "***"; \ 666e8e83a23SMasahiro Yamada false; \ 667e8e83a23SMasahiro Yamada fi 66892979997SAndi Kleen $(Q)ln -fsn $(srctree) source 6692728fcfaSMasahiro Yamada $(call cmd,makefile) 670156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 671156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 672fd5f0cd6SJan Beulichendif 6731da177e4SLinus Torvalds 674db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 675db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 676db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 677db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade. 6786072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 679db07562aSNick Desaulniers 680db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 6816f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang 682ae6b289aSChris Friesendif 683ae6b289aSChris Fries 68457fd251cSMasahiro Yamada# Include this also for config targets because some architectures need 68557fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE. 686805b2e1dSMasahiro Yamadaifdef need-compiler 68757fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler 688805b2e1dSMasahiro Yamadaendif 68957fd251cSMasahiro Yamada 6902042b548SMasahiro Yamadaifdef config-build 6911da177e4SLinus Torvalds# =========================================================================== 6921da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 6931da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 6961da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 6971da177e4SLinus Torvalds# used for 'make defconfig' 6983204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 699315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 7001da177e4SLinus Torvalds 70136de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 70231110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 70331110ebbSSam Ravnborg 70436de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 7051da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 7061da177e4SLinus Torvalds 7072042b548SMasahiro Yamadaelse #!config-build 7081da177e4SLinus Torvalds# =========================================================================== 7091da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 7101da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 7111da177e4SLinus Torvalds 7122c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 713121c2a13SMasahiro Yamada# but instead __all depend on modules 7142c1f4f12SMasahiro YamadaPHONY += all 7152c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 716121c2a13SMasahiro Yamada__all: all 7172c1f4f12SMasahiro Yamadaelse 718121c2a13SMasahiro Yamada__all: modules 7192c1f4f12SMasahiro Yamadaendif 7202c1f4f12SMasahiro Yamada 72132164845SMasahiro Yamadatargets := 72232164845SMasahiro Yamada 7232c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 7242c1f4f12SMasahiro Yamada# Normally, just do built-in. 7252c1f4f12SMasahiro Yamada 7262c1f4f12SMasahiro YamadaKBUILD_MODULES := 7272c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 7282c1f4f12SMasahiro Yamada 7292c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 7302c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 7314b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 7322c1f4f12SMasahiro Yamadaendif 7332c1f4f12SMasahiro Yamada 7342c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 7352c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 7362c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 7372c1f4f12SMasahiro Yamada 7386ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) 7392c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 7402c1f4f12SMasahiro Yamadaendif 7412c1f4f12SMasahiro Yamada 7422c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 7432c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 7442c1f4f12SMasahiro Yamadaendif 7452c1f4f12SMasahiro Yamada 7462c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 7472c1f4f12SMasahiro Yamada 7482042b548SMasahiro Yamadaifdef need-config 749d93a18f2SMasahiro Yamadainclude include/config/auto.conf 750d93a18f2SMasahiro Yamadaendif 751d93a18f2SMasahiro Yamada 7521da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 7531da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 7545750121aSMasahiro Yamadacore-y := 7555750121aSMasahiro Yamadadrivers-y := 7561da177e4SLinus Torvaldslibs-y := lib/ 7571da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 7581da177e4SLinus Torvalds 759315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 760315bab4eSMasahiro Yamada# command line. 761315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 762315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 763315bab4eSMasahiro Yamadaall: vmlinux 764315bab4eSMasahiro Yamada 7657d73c3e9SNick DesaulniersCFLAGS_GCOV := -fprofile-arcs -ftest-coverage 7667d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 7677d73c3e9SNick DesaulniersCFLAGS_GCOV += -fno-tree-loop-im 7687d73c3e9SNick Desaulniersendif 7695aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 770315bab4eSMasahiro Yamada 771b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 772b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 773b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 774b1f4ff74SPaulo Zanoniendif 775b1f4ff74SPaulo Zanoni 7763204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 777315bab4eSMasahiro Yamada 7782042b548SMasahiro Yamadaifdef need-config 7792042b548SMasahiro Yamadaifdef may-sync-config 780315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 781315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 782315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 783d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 7841da177e4SLinus Torvalds 78505850719SMasahiro Yamada$(KCONFIG_CONFIG): 78605850719SMasahiro Yamada @echo >&2 '***' 78705850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 78805850719SMasahiro Yamada @echo >&2 '***' 78905850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 79005850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 79105850719SMasahiro Yamada @echo >&2 '***' 79205850719SMasahiro Yamada @/bin/false 7931da177e4SLinus Torvalds 79461277981SUlf Magnusson# The actual configuration files used during the build are stored in 79561277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 79661277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 7979390dff6SMasahiro Yamada# 7989390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 7999390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 800f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 801d952cfafSMasahiro Yamada# 802d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 803d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input. 8042f7ab126SMiguel Ojeda%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) 805d952cfafSMasahiro Yamada $(Q)$(kecho) " SYNC $@" 806d952cfafSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 8072042b548SMasahiro Yamadaelse # !may-sync-config 808d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 809d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 810d7942413SMasahiro Yamada# Use auto.conf to trigger the test 8119ee4e336SSam RavnborgPHONY += include/config/auto.conf 8129ee4e336SSam Ravnborg 8139ee4e336SSam Ravnborginclude/config/auto.conf: 8144b098659SMasahiro Yamada @test -e include/generated/autoconf.h -a -e $@ || ( \ 8155369f550SMichal Marek echo >&2; \ 8165369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 8175369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 8185369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 8195369f550SMichal Marek echo >&2 ; \ 8209ee4e336SSam Ravnborg /bin/false) 8219ee4e336SSam Ravnborg 822d7942413SMasahiro Yamadaendif # may-sync-config 8232042b548SMasahiro Yamadaendif # need-config 8241da177e4SLinus Torvalds 8257d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-delete-null-pointer-checks 826ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 827bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 828bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 8296f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 830a1c48bb1SGeert Uytterhoeven 83115f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 832a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 8332f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=2 83415f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 83515f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 8362f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=s 8371da177e4SLinus Torvaldsendif 8381da177e4SLinus Torvalds 8392f7ab126SMiguel Ojeda# Always set `debug-assertions` and `overflow-checks` because their default 8402f7ab126SMiguel Ojeda# depends on `opt-level` and `debug-assertions`, respectively. 8412f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) 8422f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) 8432f7ab126SMiguel Ojeda 84469102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 8457d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 8467d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to 8477d73c3e9SNick Desaulniers# -fno-allow-store-data-races. 84869102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 849b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 8507d73c3e9SNick Desaulniersendif 85169102311SJiri Kosina 8521873e870SAndi Kleenifdef CONFIG_READABLE_ASM 8531873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 8541873e870SAndi Kleen# reorder blocks reorders the control in the function 8551873e870SAndi Kleen# ipa clone creates specialized cloned functions 8561873e870SAndi Kleen# partial inlining inlines only parts of functions 8577d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 8581873e870SAndi Kleenendif 8591873e870SAndi Kleen 86008f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 861a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 86235bb5b1eSAndi Kleenendif 86335bb5b1eSAndi Kleen 864893ab004SMasahiro Yamadastackp-flags-y := -fno-stack-protector 865050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 866050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 8672a61f474SMasahiro Yamada 8682a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 869e06b8b98SSam Ravnborg 870efa80b02SMasahiro YamadaKBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror 871efa80b02SMasahiro YamadaKBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y) 872f0be87c4SLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds 8733fe617ccSLinus Torvalds 8742f7ab126SMiguel OjedaKBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings 8752f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) 8762f7ab126SMiguel Ojeda 877076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 878e8c07082SArnd Bergmann# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. 879a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 880d936eb23SLinus Torvaldselse 881d936eb23SLinus Torvalds 88249832c81SRandy Dunlap# gcc inanely warns about local variables called 'main' 88349832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main 884cfe17c9bSMasahiro Yamadaendif 885cfe17c9bSMasahiro Yamada 886885480b0SNathan Chancellor# These warnings generated too much noise in a regular build. 887885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 888885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 8890a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 8906272cc38SNathan Chancellor 89149beadbdSLinus Torvalds# These result in bogus false positives 89249beadbdSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) 89349beadbdSLinus Torvalds 8941da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 895a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 8962f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 8971da177e4SLinus Torvaldselse 8987e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 8997e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 9007e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 9017e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 9027e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 9032f7ab126SMiguel Ojeda# In the Rust target specification, "frame-pointer" is set explicitly 9042f7ab126SMiguel Ojeda# to "may-omit". 9057e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 906a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 9071da177e4SLinus Torvaldsendif 9087e9501fdSRabin Vincentendif 9091da177e4SLinus Torvalds 910f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern. 911f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN 912709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 913709a972eSKees Cookendif 914709a972eSKees Cook 915f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value. 916f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO 917f0fe00d4Sglider@google.comKBUILD_CFLAGS += -ftrivial-auto-var-init=zero 918607e57c6SKees Cookifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 919607e57c6SKees Cook# https://github.com/llvm/llvm-project/issues/44842 9204e3feaadSNathan ChancellorCC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 9214e3feaadSNathan Chancellorexport CC_AUTO_VAR_INIT_ZERO_ENABLER 9224e3feaadSNathan ChancellorKBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) 923f0fe00d4Sglider@google.comendif 924f02003c8SKees Cookendif 925f0fe00d4Sglider@google.com 92639218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes 92739218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers. 92839218ff4SKees CookKBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 92939218ff4SKees Cook 930a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 931a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS 932a82adfd5SKees CookKBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 933a82adfd5SKees Cookendif 934a82adfd5SKees Cook 935606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 9363b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC 93707d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 9382f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 9392f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 9402f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 9412f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 9422f4df001SVasily Gorbik endif 9432f4df001SVasily Gorbik endif 94407d04081SVasily Gorbikendif 94522c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 946280981d6SSathvika Vasireddy ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT 94722c8542dSSami Tolvanen CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 94822c8542dSSami Tolvanen endif 949280981d6SSathvika Vasireddyendif 9503b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 9513b15cdc1SSami Tolvanen ifdef CONFIG_HAVE_C_RECORDMCOUNT 9523b15cdc1SSami Tolvanen BUILD_C_RECORDMCOUNT := y 9533b15cdc1SSami Tolvanen export BUILD_C_RECORDMCOUNT 9543b15cdc1SSami Tolvanen endif 9553b15cdc1SSami Tolvanenendif 956a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 9577d73c3e9SNick Desaulniers # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 958f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 959f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 960f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 961a2546faeSSteven Rostedt endif 962f28bc3c3SVasily Gorbikendif 963f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 964f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 965f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 96616444a8aSArnaldo Carvalho de Meloendif 96716444a8aSArnaldo Carvalho de Melo 96891341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 96991341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 9707d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-inline-functions-called-once 97191341d4bSSam Ravnborgendif 97291341d4bSSam Ravnborg 9732f7ab126SMiguel Ojeda# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). 97490ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 975e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 9762f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y 977e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 97890ad4052SMasahiro Yamadaendif 97990ad4052SMasahiro Yamada 980d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK 9819beccca0SArd Biesheuvelifndef CONFIG_DYNAMIC_SCS 982d08b9f0cSSami TolvanenCC_FLAGS_SCS := -fsanitize=shadow-call-stack 983d08b9f0cSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_SCS) 9849beccca0SArd Biesheuvelendif 985d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS 986d08b9f0cSSami Tolvanenendif 987d08b9f0cSSami Tolvanen 988dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG 989dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN 9902b868952SAlexander LobakinCC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 9917f69180bSMasahiro YamadaKBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache 992dc5723b0SSami Tolvanenelse 9932b868952SAlexander LobakinCC_FLAGS_LTO := -flto 994dc5723b0SSami Tolvanenendif 995dc5723b0SSami TolvanenCC_FLAGS_LTO += -fvisibility=hidden 99622d429e7SSami Tolvanen 99722d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size 99822d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5 99924845dcbSNick Desaulniers 10000236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion 10010236526dSTor Vic# when using lld < 13.0.0. 100224845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0) 1003fccb3d3eSMasahiro Yamadaifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y) 100424845dcbSNick DesaulniersKBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) 100524845dcbSNick Desaulniersendif 1006dc5723b0SSami Tolvanenendif 10070236526dSTor Vicendif 1008dc5723b0SSami Tolvanen 1009dc5723b0SSami Tolvanenifdef CONFIG_LTO 10105e95325fSSami TolvanenKBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 10115e95325fSSami TolvanenKBUILD_AFLAGS += -fno-lto 1012dc5723b0SSami Tolvanenexport CC_FLAGS_LTO 1013dc5723b0SSami Tolvanenendif 1014dc5723b0SSami Tolvanen 1015cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG 101689245600SSami TolvanenCC_FLAGS_CFI := -fsanitize=kcfi 1017cf68fffbSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_CFI) 1018cf68fffbSSami Tolvanenexport CC_FLAGS_CFI 1019cf68fffbSSami Tolvanenendif 1020cf68fffbSSami Tolvanen 1021d49a0626SPeter Zijlstraifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) 1022d49a0626SPeter ZijlstraKBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) 102309c60546SFeng Tangendif 102409c60546SFeng Tang 1025e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 102604e85bbfSAlexey DobriyanNOSTDINC_FLAGS += -nostdinc 1027e8e69931SSam Ravnborg 10280bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 10298289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 10300bb95f80SKees Cook 1031070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 1032fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 10331da177e4SLinus Torvalds 1034552a23a0SGustavo A. R. Silva# In order to make sure new function cast mismatches are not introduced 1035552a23a0SGustavo A. R. Silva# in the kernel (to avoid tripping CFI checking), the kernel should be 1036552a23a0SGustavo A. R. Silva# globally built with -Wcast-function-type. 1037552a23a0SGustavo A. R. SilvaKBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) 1038552a23a0SGustavo A. R. Silva 1039df8fc4e9SKees Cook# To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE, 1040df8fc4e9SKees Cook# the kernel uses only C99 flexible arrays for dynamically sized trailing 1041df8fc4e9SKees Cook# arrays. Enforce this for everything that may examine structure sizes and 1042df8fc4e9SKees Cook# perform bounds checking. 1043df8fc4e9SKees CookKBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3) 1044df8fc4e9SKees Cook 1045217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 1046217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 1047217c3e01SStephen Rothwell 10485c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 10495a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 10505c45de21SLinus Torvalds 1051adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 1052adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 1053adc71920SLinus Torvalds 105478a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 10557d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 10567d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized 10577d73c3e9SNick Desaulniersendif 105878a5255fSLinus Torvalds 105986cffecdSKees Cook# The allocators already balk at large sizes, so silence the compiler 106086cffecdSKees Cook# warnings for bounds checks involving those possible values. While 106186cffecdSKees Cook# -Wno-alloc-size-larger-than would normally be used here, earlier versions 106286cffecdSKees Cook# of gcc (<9.1) weirdly don't handle the option correctly when _other_ 106386cffecdSKees Cook# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX 106486cffecdSKees Cook# doesn't work (as it is documented to), silently resolving to "0" prior to 106586cffecdSKees Cook# version 9.1 (and producing an error more recently). Numeric values larger 106686cffecdSKees Cook# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently 106786cffecdSKees Cook# ignored, continuing to default to PTRDIFF_MAX. So, left with no other 106886cffecdSKees Cook# choice, we must perform a versioned check to disable this warning. 106986cffecdSKees Cook# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au 107088b61e3bSNick DesaulniersKBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than 107188b61e3bSNick DesaulniersKBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) 107286cffecdSKees Cook 1073fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 10748b42cf2fSMasahiro YamadaKBUILD_CFLAGS += -fno-strict-overflow 1075d0115552SLinus Torvalds 10763ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 10777d4eb0d8SMasahiro YamadaKBUILD_CFLAGS += -fno-stack-check 10783ce120b1SLinus Torvalds 10798f7f5c9fSAndi Kleen# conserve stack if available 10807d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 10817d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fconserve-stack 10827d73c3e9SNick Desaulniersendif 10838f7f5c9fSAndi Kleen 1084fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 108587de84c9SMasahiro YamadaKBUILD_CFLAGS += -Werror=date-time 1086fe7c36c7SJosh Triplett 1087ea8daa7bSDaniel Wagner# enforce correct pointer usage 1088ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 1089ea8daa7bSDaniel Wagner 1090c834f0e8SKees Cook# Require designated initializers for all marked structures 1091c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 1092c834f0e8SKees Cook 1093a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 1094a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 1095a73619a8SMasahiro Yamada 1096e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed 1097e0fe0bbeSMasahiro Yamadainclude-y := scripts/Makefile.extrawarn 10986947fd96SMasahiro Yamadainclude-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1099e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN) += scripts/Makefile.kasan 1100e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1101f80be457SAlexander Potapenkoinclude-$(CONFIG_KMSAN) += scripts/Makefile.kmsan 1102e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1103e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV) += scripts/Makefile.kcov 1104613f4b3eSKees Cookinclude-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1105e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1106e0fe0bbeSMasahiro Yamada 1107e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y)) 1108a86fe353SMasahiro Yamada 1109132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last. 1110132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel 1111132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point. 1112bf5438fcSJason Baron 11132f7ab126SMiguel Ojeda# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments 11148cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 11158cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 11168cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 11172f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KRUSTFLAGS) 111852bcc330SSam Ravnborg 1119a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1 1120a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1 112118991197SRoland McGrath 11220d362be5SNick DesaulniersKBUILD_LDFLAGS += -z noexecstack 11230d362be5SNick Desaulniersifeq ($(CONFIG_LD_IS_BFD),y) 11240d362be5SNick DesaulniersKBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 11250d362be5SNick Desaulniersendif 11260d362be5SNick Desaulniers 11275d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 11280f1fe9d6SMasahiro YamadaLDFLAGS_vmlinux += -X 11295d7d18f5SDavid Howellsendif 11305d7d18f5SDavid Howells 11315cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 1132ccb2d173SFangrui Song# ld.lld before 15 did not support -z pack-relative-relocs. 1133ccb2d173SFangrui SongLDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) 11345cf896fbSPeter Collingbourneendif 11355cf896fbSPeter Collingbourne 113659612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the 113759612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script. 113859612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN 1139e1789d7cSXin LiLDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) 114059612b24SNathan Chancellorendif 114159612b24SNathan Chancellor 11427f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 11437f58b487SMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 11447f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 11457f3a59dbSMasahiro Yamada 114680591e61SLuc Van Oostenryck# make the checker run with the right architecture 114780591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 114880591e61SLuc Van Oostenryck 114914516765SLuc Van Oostenryck# insure the checker run with the right endianness 115014516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 115114516765SLuc Van Oostenryck 11521f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 11531f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 11541f2f01b1SLuc Van Oostenryck 11551da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 11561da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 11571da177e4SLinus Torvalds# set in the environment 11581da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 11591da177e4SLinus Torvalds# this default value 11601da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds# 11631da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 11641da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 11651da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 11661da177e4SLinus Torvalds 11671da177e4SLinus Torvalds# 1168f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1169f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1170f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 1171f4d4ffc0SJason Cooper# 1172f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1173f4d4ffc0SJason Cooper 1174f4d4ffc0SJason Cooper# 11751da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 11761da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 1177070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 11781da177e4SLinus Torvalds# 11791da177e4SLinus Torvalds 1180df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 11811da177e4SLinus Torvaldsexport MODLIB 11821da177e4SLinus Torvalds 1183e00d8880SMasahiro YamadaPHONY += prepare0 1184e2a666d5SRusty Russell 1185ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 11867f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order 11877f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps 118847801c97SMasahiro Yamada 11891da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 11901da177e4SLinus Torvalds 11915750121aSMasahiro Yamadabuild-dir := . 11925750121aSMasahiro Yamadaclean-dirs := $(sort . Documentation \ 119323febe37SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(core-) \ 119495fb6317SMasahiro Yamada $(drivers-) $(libs-)))) 11951da177e4SLinus Torvalds 11965750121aSMasahiro Yamadaexport ARCH_CORE := $(core-y) 11975750121aSMasahiro Yamadaexport ARCH_LIB := $(filter %/, $(libs-y)) 11985750121aSMasahiro Yamadaexport ARCH_DRIVERS := $(drivers-y) $(drivers-m) 11991f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 12005750121aSMasahiro Yamada 120132164845SMasahiro YamadaKBUILD_VMLINUX_OBJS := ./built-in.a 1202f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES 1203f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1204f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1205f0d50ca0SMasahiro Yamadaelse 1206f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1207f0d50ca0SMasahiro Yamadaendif 1208f0d50ca0SMasahiro Yamada 120932164845SMasahiro Yamadaexport KBUILD_VMLINUX_LIBS 121095698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 12111da177e4SLinus Torvalds 12122441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 12131f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 12141f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 12151f50b80aSMasahiro YamadaKBUILD_MODULES := 1 12161f50b80aSMasahiro Yamadaendif 12171f50b80aSMasahiro Yamada 121832164845SMasahiro Yamada# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 121932164845SMasahiro Yamadaquiet_cmd_ar_vmlinux.a = AR $@ 122032164845SMasahiro Yamada cmd_ar_vmlinux.a = \ 122132164845SMasahiro Yamada rm -f $@; \ 122232164845SMasahiro Yamada $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ 1223fb3041d6SMasahiro Yamada $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) 1224fbe6e37dSNicholas Piggin 122532164845SMasahiro Yamadatargets += vmlinux.a 12265e9e95ccSMasahiro Yamadavmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE 122732164845SMasahiro Yamada $(call if_changed,ar_vmlinux.a) 12282441e78bSNicolas Pitre 12297a342e6cSMasahiro YamadaPHONY += vmlinux_o 12307a342e6cSMasahiro Yamadavmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 12319c5a0ac3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o 1232741f98feSSam Ravnborg 12337a342e6cSMasahiro Yamadavmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o 12347a342e6cSMasahiro Yamada @: 12357a342e6cSMasahiro Yamada 12365d4aeffbSMasahiro YamadaPHONY += vmlinux 12378debed3eSMasahiro Yamada# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, 12388debed3eSMasahiro Yamada# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is 12398debed3eSMasahiro Yamada# unrelated; the decompressors just happen to have the same base name, 12408debed3eSMasahiro Yamada# arch/*/boot/compressed/vmlinux. 12418debed3eSMasahiro Yamada# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. 12428debed3eSMasahiro Yamada# 12438debed3eSMasahiro Yamada# _LDFLAGS_vmlinux is a workaround for the 'private export' bug: 12448debed3eSMasahiro Yamada# https://savannah.gnu.org/bugs/?61463 12458debed3eSMasahiro Yamada# For Make > 4.4, the following simple code will work: 12468debed3eSMasahiro Yamada# vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 12478debed3eSMasahiro Yamadavmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 12488debed3eSMasahiro Yamadavmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) 12495d4aeffbSMasahiro Yamadavmlinux: vmlinux.o $(KBUILD_LDS) modpost 12505d4aeffbSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux 1251392885eeSMasahiro Yamada 12521da177e4SLinus Torvalds# The actual objects are generated when descending, 12531da177e4SLinus Torvalds# make sure no implicit rule kicks in 12549c5a0ac3SMasahiro Yamada$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; 12551da177e4SLinus Torvalds 12561cb86b6cSMasahiro Yamadaifeq ($(origin KERNELRELEASE),file) 1257ec31f868SMasahiro Yamadafilechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) 12581cb86b6cSMasahiro Yamadaelse 12591cb86b6cSMasahiro Yamadafilechk_kernel.release = echo $(KERNELRELEASE) 12601cb86b6cSMasahiro Yamadaendif 12610d0e7718SMichal Marek 126283a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 126324512795SMasahiro Yamadainclude/config/kernel.release: FORCE 12640d0e7718SMichal Marek $(call filechk,kernel.release) 1265cb58455cSSam Ravnborg 1266d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1267d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1268d8821622SMasahiro Yamada# in parallel 1269d8821622SMasahiro YamadaPHONY += scripts 127060df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1271d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1272cb58455cSSam Ravnborg 12731da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 12745bb78269SSam Ravnborg# or the modules are listed in "prepare". 12755bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 12765bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 12775bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 12781da177e4SLinus Torvalds 1279a5139fb3SMasahiro YamadaPHONY += prepare archprepare 12805bb78269SSam Ravnborg 128136de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 12825e9e95ccSMasahiro Yamada asm-generic $(version_h) include/generated/utsrelease.h \ 1283a55f283eSMasahiro Yamada include/generated/compile.h include/generated/autoconf.h remove-stale-files 12845bb78269SSam Ravnborg 128565bba042SMasahiro Yamadaprepare0: archprepare 128660df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 1287ed7ceac1SMasahiro Yamada $(Q)$(MAKE) $(build)=. prepare 128886feeaa8SSam Ravnborg 12891da177e4SLinus Torvalds# All the preparing.. 12900d989ac2SMasahiro Yamadaprepare: prepare0 12912f7ab126SMiguel Ojedaifdef CONFIG_RUST 12922f7ab126SMiguel Ojeda $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v 12932f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust 12942f7ab126SMiguel Ojedaendif 1295b9ab5ebbSJosh Poimboeuf 12961476fee5SMasahiro YamadaPHONY += remove-stale-files 12971476fee5SMasahiro Yamadaremove-stale-files: 12981476fee5SMasahiro Yamada $(Q)$(srctree)/scripts/remove-stale-files 12991476fee5SMasahiro Yamada 13002c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 13017d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 13027d0e5c20SMasahiro Yamada 13032c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 13042c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1305037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1306037fc336SMasahiro Yamada generic=include/asm-generic 13072c1f4f12SMasahiro Yamadauapi-asm-generic: 1308037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1309037fc336SMasahiro Yamada generic=include/uapi/asm-generic 13102c1f4f12SMasahiro Yamada 13111da177e4SLinus Torvalds# Generate some files 13121da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 13151da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvaldsuts_len := 64 131863104eecSSam Ravnborgdefine filechk_utsrelease.h 13191da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 13201da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 13211da177e4SLinus Torvalds exit 1; \ 13221da177e4SLinus Torvalds fi; \ 1323ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 13241da177e4SLinus Torvaldsendef 13251da177e4SLinus Torvalds 132663104eecSSam Ravnborgdefine filechk_version.h 13279b82f13eSSasha Levin if [ $(SUBLEVEL) -gt 255 ]; then \ 1328ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 1329207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 13309b82f13eSSasha Levin else \ 13319b82f13eSSasha Levin echo \#define LINUX_VERSION_CODE $(shell \ 1332207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 13339b82f13eSSasha Levin fi; \ 13349b82f13eSSasha Levin echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 133588a68672SSasha Levin ((c) > 255 ? 255 : (c)))'; \ 133688a68672SSasha Levin echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 133788a68672SSasha Levin echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 133888a68672SSasha Levin echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 133963104eecSSam Ravnborgendef 134063104eecSSam Ravnborg 13415c816641SMasahiro Yamada$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) 13425c816641SMasahiro Yamada$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) 134343fee2b2SMasahiro Yamada$(version_h): FORCE 13441da177e4SLinus Torvalds $(call filechk,version.h) 13451da177e4SLinus Torvalds 1346273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 134763104eecSSam Ravnborg $(call filechk,utsrelease.h) 134863104eecSSam Ravnborg 1349a55f283eSMasahiro Yamadafilechk_compile.h = $(srctree)/scripts/mkcompile_h \ 1350a55f283eSMasahiro Yamada "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" 1351a55f283eSMasahiro Yamada 1352a55f283eSMasahiro Yamadainclude/generated/compile.h: FORCE 1353a55f283eSMasahiro Yamada $(call filechk,compile.h) 1354a55f283eSMasahiro Yamada 1355179efcb4SVegard NossumPHONY += headerdep 1356179efcb4SVegard Nossumheaderdep: 13579663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 13589663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1359179efcb4SVegard Nossum 13601da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13618d730cfbSDavid Woodhouse# Kernel headers 13628d730cfbSDavid Woodhouse 1363e6883b18SSam Ravnborg#Default location for installed headers 1364e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1365e6883b18SSam Ravnborg 136659b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 136759b2bd05SMasahiro Yamada cmd_headers_install = \ 136859b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 136959b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 137059b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 13716d716275SDavid Woodhouse 13728d730cfbSDavid WoodhousePHONY += headers_install 137359b2bd05SMasahiro Yamadaheaders_install: headers 137459b2bd05SMasahiro Yamada $(call cmd,headers_install) 13754f193362SPaul Smith 13761da177e4SLinus TorvaldsPHONY += archheaders archscripts 13771da177e4SLinus Torvalds 1378a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 13791da177e4SLinus Torvalds 138059b2bd05SMasahiro YamadaPHONY += headers 138159b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 13821b620d53SMasahiro Yamada $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) 1383d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1384d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 13851f85712eSMike Frysinger 1386e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 138759b2bd05SMasahiro Yamadaprepare: headers 1388e949f4c2SMasahiro Yamadaendif 138968475359SDavid Woodhouse 1390bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1391bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1392bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1393bdd7714bSMasahiro Yamada 13948d730cfbSDavid Woodhouse# --------------------------------------------------------------------------- 139514ccc638SMasahiro Yamada# Install 139614ccc638SMasahiro Yamada 139714ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel. 139875ef3122SRandy Dunlap# If DKMS is installed, 'make install' will eventually recurse back 139975ef3122SRandy Dunlap# to this Makefile to build and install external modules. 140014ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 140114ccc638SMasahiro Yamada 1402f774f5bbSMasahiro Yamadaquiet_cmd_install = INSTALL $(INSTALL_PATH) 1403f774f5bbSMasahiro Yamada cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 140414ccc638SMasahiro Yamada 140514ccc638SMasahiro Yamada# --------------------------------------------------------------------------- 14061bb0b18aSMasahiro Yamada# Tools 14071bb0b18aSMasahiro Yamada 140803f16cd0SJosh Poimboeufifdef CONFIG_OBJTOOL 14090d989ac2SMasahiro Yamadaprepare: tools/objtool 14100d989ac2SMasahiro Yamadaendif 14110d989ac2SMasahiro Yamada 14120d989ac2SMasahiro Yamadaifdef CONFIG_BPF 14130d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF 14140d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids 14150d989ac2SMasahiro Yamadaendif 14160d989ac2SMasahiro Yamadaendif 14170d989ac2SMasahiro Yamada 14180d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean 14190d989ac2SMasahiro Yamada 14200d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 14210d989ac2SMasahiro Yamada 14220d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist 14230d989ac2SMasahiro Yamada# in output directory, skip its clean in that case 14240d989ac2SMasahiro Yamadaresolve_btfids_clean: 14250d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),) 14260d989ac2SMasahiro Yamada $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 14270d989ac2SMasahiro Yamadaendif 14280d989ac2SMasahiro Yamada 14291bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake 14301bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_) 14311bb0b18aSMasahiro Yamadatools_silent=s 14321bb0b18aSMasahiro Yamadaendif 14331bb0b18aSMasahiro Yamada 14341bb0b18aSMasahiro Yamadatools/: FORCE 14351bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 14361bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 14371bb0b18aSMasahiro Yamada 14381bb0b18aSMasahiro Yamadatools/%: FORCE 14391bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 14401bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 14411bb0b18aSMasahiro Yamada 14421bb0b18aSMasahiro Yamada# --------------------------------------------------------------------------- 14435a5da78bSShuah Khan# Kernel selftest 14445a5da78bSShuah Khan 14455a5da78bSShuah KhanPHONY += kselftest 14464062eba9SGuillaume Tuckerkselftest: headers 14472bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 14485a5da78bSShuah Khan 14494062eba9SGuillaume Tuckerkselftest-%: headers FORCE 145017eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1451dcb825a9SWang Long 14523d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 14533d6dee7aSBamvor Jian Zhangkselftest-merge: 14543d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 14556d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 14566d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 14573e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 14583d6dee7aSBamvor Jian Zhang 14595a5da78bSShuah Khan# --------------------------------------------------------------------------- 146037c8a5faSRob Herring# Devicetree files 146137c8a5faSRob Herring 146237c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 146337c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 146437c8a5faSRob Herringendif 146537c8a5faSRob Herring 146637c8a5faSRob Herringifneq ($(dtstree),) 146737c8a5faSRob Herring 1468ee476203SMasahiro Yamada%.dtb: dtbs_prepare 146975e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 147037c8a5faSRob Herring 1471ee476203SMasahiro Yamada%.dtbo: dtbs_prepare 147275e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1473ce88c9c7SViresh Kumar 1474ee476203SMasahiro YamadaPHONY += dtbs dtbs_prepare dtbs_install dtbs_check 1475ee476203SMasahiro Yamadadtbs: dtbs_prepare 147637c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 147737c8a5faSRob Herring 1478ee476203SMasahiro Yamada# include/config/kernel.release is actually needed when installing DTBs because 1479ee476203SMasahiro Yamada# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make 1480ee476203SMasahiro Yamada# dtbs_install depend on it as dtbs_install may run as root. 1481ee476203SMasahiro Yamadadtbs_prepare: include/config/kernel.release scripts_dtc 1482ee476203SMasahiro Yamada 148375e89534SRob Herringifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1484e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1485ec201955SRob Herringendif 1486ec201955SRob Herring 1487ec201955SRob Herringifneq ($(CHECK_DTBS),) 1488ec201955SRob Herringdtbs_prepare: dt_binding_check 1489b5154bf6SMasahiro Yamadaendif 1490b5154bf6SMasahiro Yamada 1491b5154bf6SMasahiro Yamadadtbs_check: dtbs 14924f0e3a57SRob Herring 149337c8a5faSRob Herringdtbs_install: 14942431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 149537c8a5faSRob Herring 149637c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 149737c8a5faSRob Herringall: dtbs 149837c8a5faSRob Herringendif 149937c8a5faSRob Herring 150037c8a5faSRob Herringendif 150137c8a5faSRob Herring 150237c8a5faSRob HerringPHONY += scripts_dtc 150337c8a5faSRob Herringscripts_dtc: scripts_basic 150437c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 150537c8a5faSRob Herring 1506e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1507e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1508e10c4321SMasahiro Yamadaendif 1509e10c4321SMasahiro Yamada 1510c473a8d0SMasahiro YamadaPHONY += dt_binding_check 15114f0e3a57SRob Herringdt_binding_check: scripts_dtc 15124f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 15134f0e3a57SRob Herring 1514b6acf807SRob HerringPHONY += dt_compatible_check 1515b6acf807SRob Herringdt_compatible_check: dt_binding_check 1516b6acf807SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ 1517b6acf807SRob Herring 151837c8a5faSRob Herring# --------------------------------------------------------------------------- 15191da177e4SLinus Torvalds# Modules 15201da177e4SLinus Torvalds 15211da177e4SLinus Torvaldsifdef CONFIG_MODULES 15221da177e4SLinus Torvalds 15231da177e4SLinus Torvalds# By default, build modules as well 15241da177e4SLinus Torvalds 152573d1393eSMichal Marekall: modules 15261da177e4SLinus Torvalds 15274b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider 15284b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to 15294b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them. 15304b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS 15314b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 1 15324b50c8c4SMasahiro Yamadaendif 15334b50c8c4SMasahiro Yamada 15341da177e4SLinus Torvalds# Build modules 1535551559e1STejun Heo# 15361da177e4SLinus Torvalds 1537feb113adSCarlos Llamas# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES 1538f73edc89SMasahiro Yamada# is an exception. 1539f73edc89SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF_MODULES 154074d3320fSMasahiro YamadaKBUILD_BUILTIN := 1 1541f73edc89SMasahiro Yamadamodules: vmlinux 1542f73edc89SMasahiro Yamadaendif 15431da177e4SLinus Torvalds 1544f73edc89SMasahiro Yamadamodules: modules_prepare 1545a6c36632SMichal Marek 15461da177e4SLinus Torvalds# Target to prepare building external modules 1547059bc9fcSMasahiro Yamadamodules_prepare: prepare 1548596b0474SMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/module.lds 15491da177e4SLinus Torvalds 1550961ab4a3SMasahiro Yamadaexport modules_sign_only := 15511da177e4SLinus Torvalds 1552961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y) 1553961ab4a3SMasahiro YamadaPHONY += modules_sign 1554961ab4a3SMasahiro Yamadamodules_sign: modules_install 1555961ab4a3SMasahiro Yamada @: 1556961ab4a3SMasahiro Yamada 1557961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install. 1558961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 1559961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),) 1560961ab4a3SMasahiro Yamadamodules_sign_only := y 1561961ab4a3SMasahiro Yamadaendif 1562961ab4a3SMasahiro Yamadaendif 1563961ab4a3SMasahiro Yamada 15648ae071fcSMasahiro Yamadaendif # CONFIG_MODULES 15658ae071fcSMasahiro Yamada 1566961ab4a3SMasahiro Yamadamodinst_pre := 1567961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),) 1568961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre 1569961ab4a3SMasahiro Yamadaendif 1570961ab4a3SMasahiro Yamada 1571961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre) 15723e3005dfSMasahiro YamadaPHONY += __modinst_pre 15733e3005dfSMasahiro Yamada__modinst_pre: 15741da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 15751da177e4SLinus Torvalds @rm -f $(MODLIB)/source 15768ae071fcSMasahiro Yamada @mkdir -p $(MODLIB) 15778ae071fcSMasahiro Yamadaifdef CONFIG_MODULES 15788e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 15791da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 15801da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 15817e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 15821da177e4SLinus Torvalds fi 1583f65a4868SMasahiro Yamada @sed 's:^\(.*\)\.o$$:kernel/\1.ko:' modules.order > $(MODLIB)/modules.order 15848ae071fcSMasahiro Yamadaendif 15852c6d9636SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 15862c6d9636SMasahiro Yamada @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 15871da177e4SLinus Torvalds 15881da177e4SLinus Torvalds### 15891da177e4SLinus Torvalds# Cleaning is done on three levels. 15901da177e4SLinus Torvalds# make clean Delete most generated files 15911da177e4SLinus Torvalds# Leave enough to build external modules 15921da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 15931da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 15941da177e4SLinus Torvalds 15951da177e4SLinus Torvalds# Directories & files removed with 'make clean' 159669bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ 15973d32285fSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps \ 15988afc66e8SLinus Torvalds compile_commands.json .thinlto-cache rust/test rust/doc \ 15997ea01d31SMaÃra Canal rust-project.json .vmlinux.objs .vmlinux.export.c 16001da177e4SLinus Torvalds 16011da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 16020663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 1603b0d6207bSMasahiro Yamada arch/$(SRCARCH)/include/generated .objdiff \ 16040663c68cSMasahiro Yamada debian snap tar-install \ 16050663c68cSMasahiro Yamada .config .config.old .version \ 160646457133SMasahiro Yamada Module.symvers \ 16075cca3606SMasahiro Yamada certs/signing_key.pem \ 1608b31f2a49SNayna Jain certs/x509.genkey \ 1609b31f2a49SNayna Jain vmlinux-gdb.py \ 161081f59a26SMasahiro Yamada *.spec rpmbuild \ 1611c83b16ceSMasahiro Yamada rust/libmacros.so 16121da177e4SLinus Torvalds 16131da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 16141da177e4SLinus Torvalds# 16151da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 16161da177e4SLinus Torvalds 161776cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 16181da177e4SLinus Torvalds 1619bd1ee804SPawel Mollvmlinuxclean: 1620bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1621fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1622bd1ee804SPawel Moll 162350d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean 16241da177e4SLinus Torvalds 16251da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 16261da177e4SLinus Torvalds# 16271da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1628cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 16291da177e4SLinus Torvalds 1630b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 16311da177e4SLinus Torvalds$(mrproper-dirs): 16321da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 16331da177e4SLinus Torvalds 1634b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 16351da177e4SLinus Torvalds $(call cmd,rmfiles) 16362f7ab126SMiguel Ojeda @find . $(RCS_FIND_IGNORE) \ 16372f7ab126SMiguel Ojeda \( -name '*.rmeta' \) \ 16382f7ab126SMiguel Ojeda -type f -print | xargs rm -f 16391da177e4SLinus Torvalds 16401da177e4SLinus Torvalds# distclean 16411da177e4SLinus Torvalds# 16424f193362SPaul SmithPHONY += distclean 16431da177e4SLinus Torvalds 16441da177e4SLinus Torvaldsdistclean: mrproper 164519c8d912SMasahiro Yamada @find . $(RCS_FIND_IGNORE) \ 16461da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1647f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 16487a02cec5SMasahiro Yamada -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 16497a02cec5SMasahiro Yamada -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 16501da177e4SLinus Torvalds -type f -print | xargs rm -f 16511da177e4SLinus Torvalds 16521da177e4SLinus Torvalds 16531da177e4SLinus Torvalds# Packaging of the kernel to various formats 16541da177e4SLinus Torvalds# --------------------------------------------------------------------------- 16551da177e4SLinus Torvalds 1656bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1657000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1658031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1659000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds# Brief documentation of the typical targets used 16621da177e4SLinus Torvalds# --------------------------------------------------------------------------- 16631da177e4SLinus Torvalds 16645dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1665a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 16665dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 16675dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 16681da177e4SLinus Torvalds 1669fe69b420SMasahiro YamadaPHONY += help 16701da177e4SLinus Torvaldshelp: 16711da177e4SLinus Torvalds @echo 'Cleaning targets:' 16725ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 16735cc8d246SJesper Juhl @echo ' enough build support to build external modules' 16745ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 16755cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 16761da177e4SLinus Torvalds @echo '' 16771da177e4SLinus Torvalds @echo 'Configuration targets:' 16781da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 16791da177e4SLinus Torvalds @echo '' 16801da177e4SLinus Torvalds @echo 'Other generic targets:' 16811da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 16821da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 16831da177e4SLinus Torvalds @echo '* modules - Build all modules' 16849cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 16851da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 168640ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1687433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1688433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 168962718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 169062718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1691155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1692c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 16931da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 16941da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1695f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 16963f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 16973f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 16983f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 16992fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 170059df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 17012fb9b1bdSSam Ravnborg echo '' 170231b8cc80SRandy Dunlap @echo 'Static analysers:' 17031da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1704aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1705ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1706295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 170774425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 17087f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 17096ad7cbc0SNathan Huckleberry @echo ' clang-analyzer - Check with clang static analyzer' 17106ad7cbc0SNathan Huckleberry @echo ' clang-tidy - Check with clang-tidy' 171174425eeeSNicolas Palix @echo '' 1712eb8305aeSMatthias Maennich @echo 'Tools:' 1713eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1714eb8305aeSMatthias Maennich @echo '' 171531b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1716e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 17175a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 17185a5da78bSShuah Khan @echo ' running kselftest on it' 1719e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1720e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1721e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1722dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1723e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1724e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 17255a5da78bSShuah Khan @echo '' 17262f7ab126SMiguel Ojeda @echo 'Rust targets:' 17272f7ab126SMiguel Ojeda @echo ' rustavailable - Checks whether the Rust toolchain is' 17282f7ab126SMiguel Ojeda @echo ' available and, if not, explains why.' 17292f7ab126SMiguel Ojeda @echo ' rustfmt - Reformat all the Rust code in the kernel' 17302f7ab126SMiguel Ojeda @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' 17312f7ab126SMiguel Ojeda @echo ' is formatted, printing a diff otherwise.' 17322f7ab126SMiguel Ojeda @echo ' rustdoc - Generate Rust documentation' 17332f7ab126SMiguel Ojeda @echo ' (requires kernel .config)' 17342f7ab126SMiguel Ojeda @echo ' rusttest - Runs the Rust tests' 17352f7ab126SMiguel Ojeda @echo ' (requires kernel .config; downloads external repos)' 17362f7ab126SMiguel Ojeda @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' 17372f7ab126SMiguel Ojeda @echo ' (requires kernel .config)' 17382f7ab126SMiguel Ojeda @echo ' dir/file.[os] - Build specified target only' 17392f7ab126SMiguel Ojeda @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' 17402f7ab126SMiguel Ojeda @echo ' Run with RUSTFMT=n to skip reformatting if needed.' 17412f7ab126SMiguel Ojeda @echo ' The output is not intended to be compilable.' 17422f7ab126SMiguel Ojeda @echo ' dir/file.ll - Build the LLVM assembly file' 17432f7ab126SMiguel Ojeda @echo '' 174437c8a5faSRob Herring @$(if $(dtstree), \ 174537c8a5faSRob Herring echo 'Devicetree:'; \ 174637c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 174737c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 17487aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 17497aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 175037c8a5faSRob Herring echo '') 175137c8a5faSRob Herring 175231b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 175331b8cc80SRandy Dunlap @echo ' use "make tools/help"' 175431b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 175531b8cc80SRandy Dunlap @echo '' 17561da177e4SLinus Torvalds @echo 'Kernel packaging:' 1757000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 17581da177e4SLinus Torvalds @echo '' 17591da177e4SLinus Torvalds @echo 'Documentation targets:' 1760cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 17611da177e4SLinus Torvalds @echo '' 176201dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 17635c816641SMasahiro Yamada @$(or $(archhelp),\ 176401dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 17651da177e4SLinus Torvalds @echo '' 17661da177e4SLinus Torvalds @$(if $(boards), \ 17671da177e4SLinus Torvalds $(foreach b, $(boards), \ 17684234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 17691da177e4SLinus Torvalds echo '') 17705dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 17715dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 17725dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 17735dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 17745dffbe81SSegher Boessenkool echo '') 17751da177e4SLinus Torvalds 177683d98d73SMasahiro Yamada @echo ' make V=n [targets] 1: verbose build' 17776ae4b986SMasahiro Yamada @echo ' 2: give reason for rebuild of target' 17786ae4b986SMasahiro Yamada @echo ' V=1 and V=2 can be combined with V=12' 17791da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1780a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1781a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1782701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1783af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1784e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 178528bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 178628bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 178728bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1788c77d06e7SYann Droneaud @echo ' e: warnings are being treated as errors' 1789a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 1790ec201955SRob Herring @$(if $(dtstree), \ 1791ec201955SRob Herring echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ 1792ec201955SRob Herring echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ 1793ec201955SRob Herring ) 17941da177e4SLinus Torvalds @echo '' 17951da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 17961da177e4SLinus Torvalds @echo 'For further info see the ./README file' 17971da177e4SLinus Torvalds 17981da177e4SLinus Torvalds 17995dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 18005dffbe81SSegher Boessenkool 18015dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 18025dffbe81SSegher Boessenkool 1803fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 18045dffbe81SSegher Boessenkool 18055dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 18065dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 18075dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 18085dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 18095dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 18105dffbe81SSegher Boessenkool echo '') 18115dffbe81SSegher Boessenkool 18125dffbe81SSegher Boessenkool 18131da177e4SLinus Torvalds# Documentation targets 18141da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1815e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 18161f050e90SMaxim Cournoyer linkcheckdocs dochelp refcheckdocs texinfodocs infodocs 181722cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1818bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1819cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 18201da177e4SLinus Torvalds 18212f7ab126SMiguel Ojeda 18222f7ab126SMiguel Ojeda# Rust targets 18232f7ab126SMiguel Ojeda# --------------------------------------------------------------------------- 18242f7ab126SMiguel Ojeda 18252f7ab126SMiguel Ojeda# "Is Rust available?" target 18262f7ab126SMiguel OjedaPHONY += rustavailable 18272f7ab126SMiguel Ojedarustavailable: 18282f7ab126SMiguel Ojeda $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!" 18292f7ab126SMiguel Ojeda 18302f7ab126SMiguel Ojeda# Documentation target 18312f7ab126SMiguel Ojeda# 18322f7ab126SMiguel Ojeda# Using the singular to avoid running afoul of `no-dot-config-targets`. 18332f7ab126SMiguel OjedaPHONY += rustdoc 18342f7ab126SMiguel Ojedarustdoc: prepare 18352f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 18362f7ab126SMiguel Ojeda 18372f7ab126SMiguel Ojeda# Testing target 18382f7ab126SMiguel OjedaPHONY += rusttest 18392f7ab126SMiguel Ojedarusttest: prepare 18402f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 18412f7ab126SMiguel Ojeda 18422f7ab126SMiguel Ojeda# Formatting targets 18432f7ab126SMiguel OjedaPHONY += rustfmt rustfmtcheck 18442f7ab126SMiguel Ojeda 18452f7ab126SMiguel Ojeda# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. 18462f7ab126SMiguel Ojeda# 18472f7ab126SMiguel Ojeda# We match using absolute paths since `find` does not resolve them 18482f7ab126SMiguel Ojeda# when matching, which is a problem when e.g. `srctree` is `..`. 18492f7ab126SMiguel Ojeda# We `grep` afterwards in order to remove the directory entry itself. 18502f7ab126SMiguel Ojedarustfmt: 18512f7ab126SMiguel Ojeda $(Q)find $(abs_srctree) -type f -name '*.rs' \ 18522f7ab126SMiguel Ojeda -o -path $(abs_srctree)/rust/alloc -prune \ 18532f7ab126SMiguel Ojeda -o -path $(abs_objtree)/rust/test -prune \ 18542f7ab126SMiguel Ojeda | grep -Fv $(abs_srctree)/rust/alloc \ 18552f7ab126SMiguel Ojeda | grep -Fv $(abs_objtree)/rust/test \ 18562f7ab126SMiguel Ojeda | grep -Fv generated \ 18572f7ab126SMiguel Ojeda | xargs $(RUSTFMT) $(rustfmt_flags) 18582f7ab126SMiguel Ojeda 18592f7ab126SMiguel Ojedarustfmtcheck: rustfmt_flags = --check 18602f7ab126SMiguel Ojedarustfmtcheck: rustfmt 18612f7ab126SMiguel Ojeda 18622f7ab126SMiguel Ojeda# IDE support targets 18632f7ab126SMiguel OjedaPHONY += rust-analyzer 18642f7ab126SMiguel Ojedarust-analyzer: 18652f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 18662f7ab126SMiguel Ojeda 186767274c08SMasahiro Yamada# Misc 186867274c08SMasahiro Yamada# --------------------------------------------------------------------------- 186967274c08SMasahiro Yamada 187091ecf7ffSMasahiro YamadaPHONY += misc-check 187191ecf7ffSMasahiro Yamadamisc-check: 187291ecf7ffSMasahiro Yamada $(Q)$(srctree)/scripts/misc-check 187391ecf7ffSMasahiro Yamada 187491ecf7ffSMasahiro Yamadaall: misc-check 187591ecf7ffSMasahiro Yamada 187667274c08SMasahiro YamadaPHONY += scripts_gdb 18777a739ce5SMasahiro Yamadascripts_gdb: prepare0 18781e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 18798d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 188067274c08SMasahiro Yamada 188167274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 188267274c08SMasahiro Yamadaall: scripts_gdb 188367274c08SMasahiro Yamadaendif 188467274c08SMasahiro Yamada 18851da177e4SLinus Torvaldselse # KBUILD_EXTMOD 18861da177e4SLinus Torvalds 1887c753ccb2STzafrir Cohenfilechk_kernel.release = echo $(KERNELRELEASE) 1888c753ccb2STzafrir Cohen 18891da177e4SLinus Torvalds### 18901da177e4SLinus Torvalds# External module support. 18911da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 18921da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 18931da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 189411122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used. 18951da177e4SLinus Torvalds 18966212804fSMasahiro Yamada# We are always building only modules. 18976212804fSMasahiro YamadaKBUILD_BUILTIN := 18981da177e4SLinus TorvaldsKBUILD_MODULES := 1 18991da177e4SLinus Torvalds 19005750121aSMasahiro Yamadabuild-dir := $(KBUILD_EXTMOD) 19013d32285fSMasahiro Yamada 19027f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json 19033d32285fSMasahiro YamadaPHONY += compile_commands.json 19043d32285fSMasahiro Yamada 190576cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 19063d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ 1907dc5723b0SSami Tolvanen $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache 19081da177e4SLinus Torvalds 19096072b2c4SMasahiro YamadaPHONY += prepare 19106072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations 19116072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 19126072b2c4SMasahiro Yamadaprepare: 1913129ab0d2SMasahiro Yamada @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 19146072b2c4SMasahiro Yamada echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1915129ab0d2SMasahiro Yamada echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 19166072b2c4SMasahiro Yamada echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 19176072b2c4SMasahiro Yamada fi 19186072b2c4SMasahiro Yamada 1919fe69b420SMasahiro YamadaPHONY += help 19201da177e4SLinus Torvaldshelp: 19211da177e4SLinus Torvalds @echo ' Building external modules.' 19221da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 19231da177e4SLinus Torvalds @echo '' 19241da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 19251da177e4SLinus Torvalds @echo ' modules_install - install the module' 19261da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 19271da177e4SLinus Torvalds @echo '' 192806300b21SSam Ravnborg 19298ae071fcSMasahiro Yamada__external_modules_error: 19308ae071fcSMasahiro Yamada @echo >&2 '***' 19318ae071fcSMasahiro Yamada @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' 19328ae071fcSMasahiro Yamada @echo >&2 '*** You cannot build or install external modules.' 19338ae071fcSMasahiro Yamada @echo >&2 '***' 19348ae071fcSMasahiro Yamada @false 19358ae071fcSMasahiro Yamada 19361da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 19371da177e4SLinus Torvalds 19383e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 19393e3005dfSMasahiro Yamada# Modules 19403e3005dfSMasahiro Yamada 19417f371813SMasahiro YamadaPHONY += modules modules_install modules_prepare 19423e3005dfSMasahiro Yamada 19433e3005dfSMasahiro Yamadaifdef CONFIG_MODULES 19443e3005dfSMasahiro Yamada 19455750121aSMasahiro Yamada$(MODORDER): $(build-dir) 19465750121aSMasahiro Yamada @: 19475750121aSMasahiro Yamada 1948f73edc89SMasahiro Yamada# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. 1949f73edc89SMasahiro Yamada# This is solely useful to speed up test compiles. 1950f73edc89SMasahiro Yamadamodules: modpost 1951f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1) 1952f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 1953f73edc89SMasahiro Yamadaendif 19543e3005dfSMasahiro Yamada 19551a998be6SMasahiro YamadaPHONY += modules_check 19561a998be6SMasahiro Yamadamodules_check: $(MODORDER) 19571a998be6SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 19581a998be6SMasahiro Yamada 19593ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD $(MODLIB) 19603e3005dfSMasahiro Yamada cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 19613e3005dfSMasahiro Yamada $(KERNELRELEASE) 19623e3005dfSMasahiro Yamada 19633e3005dfSMasahiro Yamadamodules_install: 19643e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 19653e3005dfSMasahiro Yamada $(call cmd,depmod) 19663e3005dfSMasahiro Yamada 19673e3005dfSMasahiro Yamadaelse # CONFIG_MODULES 19683e3005dfSMasahiro Yamada 19693e3005dfSMasahiro Yamada# Modules not configured 19703e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 19713e3005dfSMasahiro Yamada 19728ae071fcSMasahiro YamadaPHONY += __external_modules_error 19738ae071fcSMasahiro Yamada 19748ae071fcSMasahiro Yamadamodules modules_install: __external_modules_error 19758ae071fcSMasahiro Yamada @: 19763e3005dfSMasahiro Yamada 1977f110e5a2SMasahiro YamadaKBUILD_MODULES := 1978f110e5a2SMasahiro Yamada 19793e3005dfSMasahiro Yamadaendif # CONFIG_MODULES 19803e3005dfSMasahiro Yamada 1981f73edc89SMasahiro YamadaPHONY += modpost 1982f73edc89SMasahiro Yamadamodpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ 1983f73edc89SMasahiro Yamada $(if $(KBUILD_MODULES), modules_check) 1984f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1985f73edc89SMasahiro Yamada 1986b1fbfcb4SMasahiro Yamada# Single targets 1987b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1988b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1989b1fbfcb4SMasahiro Yamada# 1990b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1991b1fbfcb4SMasahiro Yamada# 1992b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1993b1fbfcb4SMasahiro Yamada# 1994b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1995b1fbfcb4SMasahiro Yamada# 1996b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1997b1fbfcb4SMasahiro Yamada 1998b1fbfcb4SMasahiro Yamadaifdef single-build 1999b1fbfcb4SMasahiro Yamada 2000b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 2001b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 2002fc93a4cdSMasahiro Yamadasingle-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 2003fc93a4cdSMasahiro Yamada $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 2004b1fbfcb4SMasahiro Yamada 2005f73edc89SMasahiro Yamada$(single-ko): single_modules 2006b1fbfcb4SMasahiro Yamada @: 20075750121aSMasahiro Yamada$(single-no-ko): $(build-dir) 2008b1fbfcb4SMasahiro Yamada @: 2009b1fbfcb4SMasahiro Yamada 2010f110e5a2SMasahiro Yamada# Remove MODORDER when done because it is not the real one. 2011f73edc89SMasahiro YamadaPHONY += single_modules 2012f73edc89SMasahiro Yamadasingle_modules: $(single-no-ko) modules_prepare 2013a53da43dSMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER) 2014b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 2015f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1) 2016f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 2017f73edc89SMasahiro Yamadaendif 2018f110e5a2SMasahiro Yamada $(Q)rm -f $(MODORDER) 2019b1fbfcb4SMasahiro Yamada 20205750121aSMasahiro Yamadasingle-goals := $(addprefix $(build-dir)/, $(single-no-ko)) 2021b1fbfcb4SMasahiro Yamada 20223753af77SMasahiro YamadaKBUILD_MODULES := 1 20233753af77SMasahiro Yamada 2024b1fbfcb4SMasahiro Yamadaendif 2025b1fbfcb4SMasahiro Yamada 2026c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 2027c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 2028c99f3918SMasahiro Yamada# make menuconfig etc. 2029c99f3918SMasahiro Yamada# Error messages still appears in the original language 20305750121aSMasahiro YamadaPHONY += $(build-dir) 20315750121aSMasahiro Yamada$(build-dir): prepare 20325750121aSMasahiro Yamada $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) 2033c99f3918SMasahiro Yamada 203476cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 203576cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 203676cd306dSMasahiro Yamada$(clean-dirs): 203776cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 203876cd306dSMasahiro Yamada 203988d7be03SMichal Marekclean: $(clean-dirs) 204088d7be03SMichal Marek $(call cmd,rmfiles) 20415c816641SMasahiro Yamada @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 20422f7ab126SMiguel Ojeda \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ 20434f0e3a57SRob Herring -o -name '*.ko.*' \ 2044dcad240cSAndrew Davis -o -name '*.dtb' -o -name '*.dtbo' \ 2045dcad240cSAndrew Davis -o -name '*.dtb.S' -o -name '*.dtbo.S' \ 2046dcad240cSAndrew Davis -o -name '*.dt.yaml' \ 2047ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 20485e9e95ccSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 204988d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 20509a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 20514fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 205288d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 20536b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 2054433db3e2SVinÃcius Tinti -o -name '*.ll' \ 205538e89184SSami Tolvanen -o -name '*.gcno' \ 20569c73bcfaSThomas Weißschuh -o -name '*.*.symversions' \) -type f -print \ 20579c73bcfaSThomas Weißschuh -o -name '.tmp_*' -print \ 20589c73bcfaSThomas Weißschuh | xargs rm -rf 205988d7be03SMichal Marek 20601da177e4SLinus Torvalds# Generate tags for editors 20611da177e4SLinus Torvalds# --------------------------------------------------------------------------- 2062a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 2063858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 20641da177e4SLinus Torvalds 2065f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 20661da177e4SLinus Torvalds $(call cmd,tags) 20671da177e4SLinus Torvalds 2068eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 2069eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 2070eb8305aeSMatthias Maennich 2071eb8305aeSMatthias MaennichPHONY += nsdeps 2072bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 2073eb8305aeSMatthias Maennichnsdeps: modules 2074bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 2075eb8305aeSMatthias Maennich 20763d32285fSMasahiro Yamada# Clang Tooling 20773d32285fSMasahiro Yamada# --------------------------------------------------------------------------- 20783d32285fSMasahiro Yamada 20793d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN $@ 20803d32285fSMasahiro Yamada cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 20813d32285fSMasahiro Yamada 20827f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ 208332164845SMasahiro Yamada $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ 20843d32285fSMasahiro Yamada $(if $(CONFIG_MODULES), $(MODORDER)) FORCE 20853d32285fSMasahiro Yamada $(call if_changed,gen_compile_commands) 20863d32285fSMasahiro Yamada 20877f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json 20883d32285fSMasahiro Yamada 20896ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer 20906ad7cbc0SNathan Huckleberry 20916ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG 20926ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK $< 20936ad7cbc0SNathan Huckleberry cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 20946ad7cbc0SNathan Huckleberry 20957f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json 20966ad7cbc0SNathan Huckleberry $(call cmd,clang_tools) 20976ad7cbc0SNathan Huckleberryelse 20986ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer: 20996ad7cbc0SNathan Huckleberry @echo "$@ requires CC=clang" >&2 21006ad7cbc0SNathan Huckleberry @false 21016ad7cbc0SNathan Huckleberryendif 21026ad7cbc0SNathan Huckleberry 21031da177e4SLinus Torvalds# Scripts to check various things for consistency 21041da177e4SLinus Torvalds# --------------------------------------------------------------------------- 21051da177e4SLinus Torvalds 21067dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report 2107279f3dd3SPeter Foley 21081da177e4SLinus Torvaldsincludecheck: 2109436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 21101da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 211180007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 21121da177e4SLinus Torvalds 21131da177e4SLinus Torvaldsversioncheck: 21142ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 21151da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 211680007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 21171da177e4SLinus Torvalds 211874425eeeSNicolas Palixcoccicheck: 2119858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 212074425eeeSNicolas Palix 2121295ac051SAdrian Bunkexport_report: 2122295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 2123295ac051SAdrian Bunk 2124c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 2125e3ccf6e3SJeff Dike 2126011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 2127011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2128011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 2129011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 2130011e3a9aSJeff Dikeifeq ($(ARCH), um) 2131011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 2132011e3a9aSJeff Dikeelse 2133011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 2134011e3a9aSJeff Dikeendif 21351da177e4SLinus Torvaldscheckstack: 21361da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 213775dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 21381da177e4SLinus Torvalds 21397b8ea53dSAmerigo Wangkernelrelease: 21401cb86b6cSMasahiro Yamada @$(filechk_kernel.release) 214101ab1788SAmerigo Wang 2142cb58455cSSam Ravnborgkernelversion: 21432244cbd8SSam Ravnborg @echo $(KERNELVERSION) 21441da177e4SLinus Torvalds 2145c398ff00SMike Marciniszynimage_name: 2146c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 2147c398ff00SMike Marciniszyn 21481da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 21490663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 21501da177e4SLinus Torvalds 2151392885eeSMasahiro Yamada# read saved command lines for existing targets 2152392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 21531da177e4SLinus Torvalds 2154b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 21551da177e4SLinus Torvalds 215646b7c492SSZ Lin (林上智)endif # config-build 21572042b548SMasahiro Yamadaendif # mixed-build 2158688931a5SMasahiro Yamadaendif # need-sub-make 21591da177e4SLinus Torvalds 21604f193362SPaul SmithPHONY += FORCE 21611da177e4SLinus TorvaldsFORCE: 21624f193362SPaul Smith 2163bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 2164fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 21654f193362SPaul Smith.PHONY: $(PHONY) 2166