1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2568035b0SLinus TorvaldsVERSION = 6 39abf2313SLinus TorvaldsPATCHLEVEL = 1 455922c9dSLinus TorvaldsSUBLEVEL = 0 5eb708140SLinus TorvaldsEXTRAVERSION = -rc6 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 14*87d599fcSMasahiro Yamadaifeq ($(filter undefine,$(.FEATURES)),) 15*87d599fcSMasahiro Yamada$(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION)) 16*87d599fcSMasahiro Yamadaendif 17*87d599fcSMasahiro Yamada 18121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \ 19121c2a13SMasahiro Yamada $(error targets prefixed with '__' are only for internal use)) 20121c2a13SMasahiro Yamada 21ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 22121c2a13SMasahiro YamadaPHONY := __all 23121c2a13SMasahiro Yamada__all: 24ba634eceSMasahiro Yamada 251da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 261da177e4SLinus Torvalds# to get the ordering right. 271da177e4SLinus Torvalds# 281da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 291da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 301da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 31f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 321da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 331da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 341da177e4SLinus Torvalds# is now up to date. 351da177e4SLinus Torvalds# 361da177e4SLinus Torvalds# The only cases where we need to modify files which have global 371da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 381da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 391da177e4SLinus Torvalds# prepare rule. 401da177e4SLinus Torvalds 41221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 423812b8c5SMasahiro Yamada 433812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 443812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 453812b8c5SMasahiro YamadaMAKEFLAGS += -rR 463812b8c5SMasahiro Yamada 473812b8c5SMasahiro Yamada# Avoid funny character set dependencies 483812b8c5SMasahiro Yamadaunexport LC_ALL 493812b8c5SMasahiro YamadaLC_COLLATE=C 503812b8c5SMasahiro YamadaLC_NUMERIC=C 513812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 523812b8c5SMasahiro Yamada 533812b8c5SMasahiro Yamada# Avoid interference with shell env settings 543812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 553812b8c5SMasahiro Yamada 56066b7ed9SMichal Marek# Beautify output 57066b7ed9SMichal Marek# --------------------------------------------------------------------------- 58066b7ed9SMichal Marek# 59066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 60066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 61066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 62066b7ed9SMichal Marek# 63066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 64066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 65066b7ed9SMichal Marek# 66066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 67066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 68066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 69066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 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# 74066b7ed9SMichal Marek# $(Q)ln $@ :< 75066b7ed9SMichal Marek# 76066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 77066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 78505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 79066b7ed9SMichal Marek# 801da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 811da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 821da177e4SLinus Torvalds 831da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 841da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 851da177e4SLinus Torvaldsendif 861da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 871da177e4SLinus Torvalds KBUILD_VERBOSE = 0 881da177e4SLinus Torvaldsendif 891da177e4SLinus Torvalds 90066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 91066b7ed9SMichal Marek quiet = 92066b7ed9SMichal Marek Q = 93066b7ed9SMichal Marekelse 94066b7ed9SMichal Marek quiet=quiet_ 95066b7ed9SMichal Marek Q = @ 96066b7ed9SMichal Marekendif 97066b7ed9SMichal Marek 98066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 99066b7ed9SMichal Marek# commands 1004bf73588SDmitry Goncharov# make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS. 101066b7ed9SMichal Marek 1024bf73588SDmitry Goncharovifeq ($(filter 3.%,$(MAKE_VERSION)),) 1034bf73588SDmitry Goncharovsilence:=$(findstring s,$(firstword -$(MAKEFLAGS))) 1044bf73588SDmitry Goncharovelse 1054bf73588SDmitry Goncharovsilence:=$(findstring s,$(filter-out --%,$(MAKEFLAGS))) 1064bf73588SDmitry Goncharovendif 1074bf73588SDmitry Goncharov 1084bf73588SDmitry Goncharovifeq ($(silence),s) 109066b7ed9SMichal Marekquiet=silent_ 11022149454SMasahiro YamadaKBUILD_VERBOSE = 0 111066b7ed9SMichal Marekendif 112066b7ed9SMichal Marek 113066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 114066b7ed9SMichal Marek 115bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 116bcf637f5SMasahiro Yamada# C compilation. 117bcf637f5SMasahiro Yamada# 118bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 119bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 120bcf637f5SMasahiro Yamada# of whether they are re-compiled or not. 121bcf637f5SMasahiro Yamada# 122bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details, 123bcf637f5SMasahiro Yamada# including where to get the "sparse" utility. 124bcf637f5SMasahiro Yamada 125bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line") 126bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = $(C) 127bcf637f5SMasahiro Yamadaendif 128bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC 129bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = 0 130bcf637f5SMasahiro Yamadaendif 131bcf637f5SMasahiro Yamada 132bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC 133bcf637f5SMasahiro Yamada 1342f7ab126SMiguel Ojeda# Enable "clippy" (a linter) as part of the Rust compilation. 1352f7ab126SMiguel Ojeda# 1362f7ab126SMiguel Ojeda# Use 'make CLIPPY=1' to enable it. 1372f7ab126SMiguel Ojedaifeq ("$(origin CLIPPY)", "command line") 1382f7ab126SMiguel Ojeda KBUILD_CLIPPY := $(CLIPPY) 1392f7ab126SMiguel Ojedaendif 1402f7ab126SMiguel Ojeda 1412f7ab126SMiguel Ojedaexport KBUILD_CLIPPY 1422f7ab126SMiguel Ojeda 143bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 144bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 145bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line") 146bcf637f5SMasahiro Yamada KBUILD_EXTMOD := $(M) 147bcf637f5SMasahiro Yamadaendif 148bcf637f5SMasahiro Yamada 149bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \ 150bcf637f5SMasahiro Yamada $(error building multiple external modules is not supported)) 151bcf637f5SMasahiro Yamada 1529a68fd7fSMasahiro Yamada$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ 1539a68fd7fSMasahiro Yamada $(error module directory path cannot contain '$x'))) 1549a68fd7fSMasahiro Yamada 15574ee585bSMasahiro Yamada# Remove trailing slashes 15674ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),) 15774ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) 15874ee585bSMasahiro Yamadaendif 15974ee585bSMasahiro Yamada 160bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD 161bcf637f5SMasahiro Yamada 16225b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 16325b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 16425b146c5SMasahiro Yamada# 16525b146c5SMasahiro Yamada# For example, you can do this: 16625b146c5SMasahiro Yamada# 16725b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 16825b146c5SMasahiro Yamada# 16925b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 17025b146c5SMasahiro Yamada# two syntaxes to specify it. 17125b146c5SMasahiro Yamada# 1721da177e4SLinus Torvalds# 1) O= 1731da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1741da177e4SLinus Torvalds# 1751da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 17625b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 17725b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1781da177e4SLinus Torvalds# 1791da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1801da177e4SLinus Torvalds# variable. 1811da177e4SLinus Torvalds 18225b146c5SMasahiro Yamada# Do we want to change the working directory? 1831da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1841da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1851da177e4SLinus Torvaldsendif 1861da177e4SLinus Torvalds 18725b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 18825b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 18925b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 19025b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 19125b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 19225b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 19325b146c5SMasahiro Yamada 19425b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 19525b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 19625b146c5SMasahiro Yamadaelse 19725b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 19825b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 19925b146c5SMasahiro Yamada 20025b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 20125b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 20225b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 20325b146c5SMasahiro Yamadaelse 20425b146c5SMasahiro Yamadaneed-sub-make := 1 20551193b76SRobert Jarzmikendif 20651193b76SRobert Jarzmik 20730cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 20830cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile))) 2091da177e4SLinus Torvalds 21025b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 21125b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 21225b146c5SMasahiro Yamadaendif 21325b146c5SMasahiro Yamada 21425b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 21580463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 21680463f1bSMasahiro Yamada# 217d8285639SMasahiro Yamada# --included-dir is added for backward compatibility, but you should not rely on 218d8285639SMasahiro Yamada# it. Please add $(srctree)/ prefix to include Makefiles in the source tree. 21925b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 22025b146c5SMasahiro Yamadaendif 2213812b8c5SMasahiro Yamada 222688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 223688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 224688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 225688931a5SMasahiro Yamadaneed-sub-make := 1 226688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 22793fdddfeSMasahiro Yamada$(this-makefile): ; 228688931a5SMasahiro Yamadaendif 229688931a5SMasahiro Yamada 23025b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 231221cc2d2SMasahiro Yamadaexport sub_make_done := 1 232221cc2d2SMasahiro Yamada 233688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 234688931a5SMasahiro Yamada 235121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 2360b35786dSMilton Miller 237121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 23816f89098SCharles Keepax @: 2390b35786dSMilton Miller 240c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 241121c2a13SMasahiro Yamada__sub-make: 24225b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 2431da177e4SLinus Torvalds 244688931a5SMasahiro Yamadaendif # need-sub-make 245221cc2d2SMasahiro Yamadaendif # sub_make_done 246688931a5SMasahiro Yamada 2471da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 248688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 2491da177e4SLinus Torvalds 2507ff52571SMasahiro Yamada# Do not print "Entering directory ...", 2517ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 2527ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 2537ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 2547ff52571SMasahiro Yamada 25525b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2569da0763bSMichal Marek # building in the source tree 2579da0763bSMichal Marek srctree := . 258051f278eSMasahiro Yamada building_out_of_srctree := 2599da0763bSMichal Marekelse 26025b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2619da0763bSMichal Marek # building in a subdirectory of the source tree 2629da0763bSMichal Marek srctree := .. 2639da0763bSMichal Marek else 26425b146c5SMasahiro Yamada srctree := $(abs_srctree) 2659da0763bSMichal Marek endif 266051f278eSMasahiro Yamada building_out_of_srctree := 1 2679da0763bSMichal Marekendif 2682c1f4f12SMasahiro Yamada 26995fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 27095fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 27195fd3f87SMasahiro Yamadaendif 2722c1f4f12SMasahiro Yamada 2737e1c0477SMichal Marekobjtree := . 2746b12de69SMasahiro YamadaVPATH := $(srctree) 2751da177e4SLinus Torvalds 276051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2771da177e4SLinus Torvalds 2782c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2792c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2802c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2812c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2822c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2832c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2842c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2852c1f4f12SMasahiro Yamada 2862c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2872c1f4f12SMasahiro Yamada 28822340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 28922340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2902c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 29159b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2924623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 2932f7ab126SMiguel Ojeda outputmakefile rustavailable rustfmt rustfmtcheck 294805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install 295805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed. 296805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \ 297805b2e1dSMasahiro Yamada headers_install modules_install kernelrelease image_name 298993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ 299993bdde9SMasahiro Yamada image_name 3002f7ab126SMiguel Ojedasingle-targets := %.a %.i %.rsi %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 3012c1f4f12SMasahiro Yamada 3022042b548SMasahiro Yamadaconfig-build := 3032042b548SMasahiro Yamadamixed-build := 3042042b548SMasahiro Yamadaneed-config := 1 305805b2e1dSMasahiro Yamadaneed-compiler := 1 306d7942413SMasahiro Yamadamay-sync-config := 1 307394053f4SMasahiro Yamadasingle-build := 3082c1f4f12SMasahiro Yamada 3092c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 3102c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 3112042b548SMasahiro Yamada need-config := 3122c1f4f12SMasahiro Yamada endif 3132c1f4f12SMasahiro Yamadaendif 3142c1f4f12SMasahiro Yamada 315805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) 316805b2e1dSMasahiro Yamada ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) 317805b2e1dSMasahiro Yamada need-compiler := 318805b2e1dSMasahiro Yamada endif 319805b2e1dSMasahiro Yamadaendif 320805b2e1dSMasahiro Yamada 321d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 322d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 3232042b548SMasahiro Yamada may-sync-config := 324d7942413SMasahiro Yamada endif 325d7942413SMasahiro Yamadaendif 326d7942413SMasahiro Yamada 327d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 3282042b548SMasahiro Yamada may-sync-config := 329d7942413SMasahiro Yamadaendif 330d7942413SMasahiro Yamada 3312c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 332efbf9726SMasahiro Yamada ifneq ($(filter %config,$(MAKECMDGOALS)),) 3332042b548SMasahiro Yamada config-build := 1 3342c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 3352042b548SMasahiro Yamada mixed-build := 1 3362c1f4f12SMasahiro Yamada endif 3372c1f4f12SMasahiro Yamada endif 3382c1f4f12SMasahiro Yamadaendif 33922340a06SMasahiro Yamada 340394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 341394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 342394053f4SMasahiro Yamada single-build := 1 343394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 344394053f4SMasahiro Yamada mixed-build := 1 345394053f4SMasahiro Yamada endif 346394053f4SMasahiro Yamadaendif 347394053f4SMasahiro Yamada 34822340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 34922340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 35022340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3512042b548SMasahiro Yamada mixed-build := 1 35222340a06SMasahiro Yamada endif 35322340a06SMasahiro Yamadaendif 35422340a06SMasahiro Yamada 3552c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3562c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3572c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3582042b548SMasahiro Yamada mixed-build := 1 3592c1f4f12SMasahiro Yamada endif 3602c1f4f12SMasahiro Yamadaendif 3612c1f4f12SMasahiro Yamada 3622042b548SMasahiro Yamadaifdef mixed-build 3632c1f4f12SMasahiro Yamada# =========================================================================== 3642c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3652c1f4f12SMasahiro Yamada# Handle them one by one. 3662c1f4f12SMasahiro Yamada 3672c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3682c1f4f12SMasahiro Yamada 369121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 3702c1f4f12SMasahiro Yamada @: 3712c1f4f12SMasahiro Yamada 3722c1f4f12SMasahiro Yamada__build_one_by_one: 3732c1f4f12SMasahiro Yamada $(Q)set -e; \ 3742c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3752c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3762c1f4f12SMasahiro Yamada done 3772c1f4f12SMasahiro Yamada 3782042b548SMasahiro Yamadaelse # !mixed-build 3792c1f4f12SMasahiro Yamada 3803204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include 3812c1f4f12SMasahiro Yamada 3822c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3836768fa4bSMasahiro YamadaKERNELRELEASE = $(call read-file, include/config/kernel.release) 3842c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3852c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3862c1f4f12SMasahiro Yamada 3873204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3901da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3911da177e4SLinus Torvalds# 3921da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3931da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3941da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3951da177e4SLinus Torvalds# make ARCH=ia64 3961da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3971da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3981da177e4SLinus Torvalds 3991da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 4001da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 4011da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 4021da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 4031da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 4041da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 4051da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 4061da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 4072331d1a6SSam RavnborgARCH ?= $(SUBARCH) 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds# Architecture as present in compile.h 4101da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 4116752ed90SThomas GleixnerSRCARCH := $(ARCH) 4121da177e4SLinus Torvalds 413d746d647SSam Ravnborg# Additional ARCH settings for x86 414d746d647SSam Ravnborgifeq ($(ARCH),i386) 415d746d647SSam Ravnborg SRCARCH := x86 416d746d647SSam Ravnborgendif 417d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 418d746d647SSam Ravnborg SRCARCH := x86 419d746d647SSam Ravnborgendif 42074b469f2SSam Ravnborg 4215e538790SSam Ravnborg# Additional ARCH settings for sparc 422e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 423e69f58c0SNamhyung Kim SRCARCH := sparc 424e69f58c0SNamhyung Kimendif 425a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 4265e538790SSam Ravnborg SRCARCH := sparc 427a439fe51SSam Ravnborgendif 4282fb9b1bdSSam Ravnborg 4295f6e0fe0SMasahiro Yamada# Additional ARCH settings for parisc 4305f6e0fe0SMasahiro Yamadaifeq ($(ARCH),parisc64) 4315f6e0fe0SMasahiro Yamada SRCARCH := parisc 4325f6e0fe0SMasahiro Yamadaendif 4335f6e0fe0SMasahiro Yamada 434f02aa48dSMasahiro Yamadaexport cross_compiling := 435f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH)) 436f02aa48dSMasahiro Yamadacross_compiling := 1 437f02aa48dSMasahiro Yamadaendif 438f02aa48dSMasahiro Yamada 43914cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 44041263fc6SBen Gardinerexport KCONFIG_CONFIG 44114cdd3c4SRoman Zippel 4421da177e4SLinus Torvalds# SHELL used by kbuild 443858805b3SMasahiro YamadaCONFIG_SHELL := sh 4441da177e4SLinus Torvalds 4456d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4466d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4476d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 448d7f14c66SUwe Kleine-König 449a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 450e9c28192SNathan Chancellorifneq ($(filter %/,$(LLVM)),) 451e9c28192SNathan ChancellorLLVM_PREFIX := $(LLVM) 452e9c28192SNathan Chancellorelse ifneq ($(filter -%,$(LLVM)),) 453e9c28192SNathan ChancellorLLVM_SUFFIX := $(LLVM) 454e9c28192SNathan Chancellorendif 455e9c28192SNathan Chancellor 456e9c28192SNathan ChancellorHOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 457e9c28192SNathan ChancellorHOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 458a0d1c951SMasahiro Yamadaelse 4591da177e4SLinus TorvaldsHOSTCC = gcc 4601da177e4SLinus TorvaldsHOSTCXX = g++ 461a0d1c951SMasahiro Yamadaendif 4622f7ab126SMiguel OjedaHOSTRUSTC = rustc 463d5ea4fecSChun-Tse ShaoHOSTPKG_CONFIG = pkg-config 4647f3a59dbSMasahiro Yamada 465f67695c9SElliot BermanKBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 4661e240781SArnd Bergmann -O2 -fomit-frame-pointer -std=gnu11 \ 4674d94f910SMark Rutland -Wdeclaration-after-statement 468f67695c9SElliot BermanKBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) 469f67695c9SElliot BermanKBUILD_USERLDFLAGS := $(USERLDFLAGS) 4707f3a59dbSMasahiro Yamada 4712f7ab126SMiguel Ojeda# These flags apply to all Rust code in the tree, including the kernel and 4722f7ab126SMiguel Ojeda# host programs. 4732f7ab126SMiguel Ojedaexport rust_common_flags := --edition=2021 \ 4742f7ab126SMiguel Ojeda -Zbinary_dep_depinfo=y \ 4752f7ab126SMiguel Ojeda -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \ 4762f7ab126SMiguel Ojeda -Dunreachable_pub -Dnon_ascii_idents \ 4772f7ab126SMiguel Ojeda -Wmissing_docs \ 4782f7ab126SMiguel Ojeda -Drustdoc::missing_crate_level_docs \ 4792f7ab126SMiguel Ojeda -Dclippy::correctness -Dclippy::style \ 4802f7ab126SMiguel Ojeda -Dclippy::suspicious -Dclippy::complexity \ 4812f7ab126SMiguel Ojeda -Dclippy::perf \ 4822f7ab126SMiguel Ojeda -Dclippy::let_unit_value -Dclippy::mut_mut \ 4832f7ab126SMiguel Ojeda -Dclippy::needless_bitwise_bool \ 4842f7ab126SMiguel Ojeda -Dclippy::needless_continue \ 4852f7ab126SMiguel Ojeda -Wclippy::dbg_macro 4862f7ab126SMiguel Ojeda 487f67695c9SElliot BermanKBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 488735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 4892f7ab126SMiguel OjedaKBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ 4902f7ab126SMiguel Ojeda -Zallow-features= $(HOSTRUSTFLAGS) 491f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 492f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds# Make variables (CC, etc...) 4951da177e4SLinus TorvaldsCPP = $(CC) -E 496a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 497e9c28192SNathan ChancellorCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 498e9c28192SNathan ChancellorLD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 499e9c28192SNathan ChancellorAR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 500e9c28192SNathan ChancellorNM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 501e9c28192SNathan ChancellorOBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 502e9c28192SNathan ChancellorOBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 503e9c28192SNathan ChancellorREADELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 504e9c28192SNathan ChancellorSTRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 505a0d1c951SMasahiro Yamadaelse 506a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 507a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 5081da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 5091da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 5101da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 5111da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 512eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 513a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 514a0d1c951SMasahiro Yamadaendif 5152f7ab126SMiguel OjedaRUSTC = rustc 5162f7ab126SMiguel OjedaRUSTDOC = rustdoc 5172f7ab126SMiguel OjedaRUSTFMT = rustfmt 5182f7ab126SMiguel OjedaCLIPPY_DRIVER = clippy-driver 5192f7ab126SMiguel OjedaBINDGEN = bindgen 5202f7ab126SMiguel OjedaCARGO = cargo 521e83b9f55SAndrii NakryikoPAHOLE = pahole 522c9a0f3b8SJiri OlsaRESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 52373a4f6dbSMasahiro YamadaLEX = flex 52473a4f6dbSMasahiro YamadaYACC = bison 5251da177e4SLinus TorvaldsAWK = awk 526caa27b66SSam RavnborgINSTALLKERNEL := installkernel 527436e980eSDominique MartinetDEPMOD = depmod 5281da177e4SLinus TorvaldsPERL = perl 529e9781b52SMasahiro YamadaPYTHON3 = python3 5301da177e4SLinus TorvaldsCHECK = sparse 531858805b3SMasahiro YamadaBASH = bash 532e4a42c82SDenis EfremovKGZIP = gzip 533e4a42c82SDenis EfremovKBZIP2 = bzip2 534e4a42c82SDenis EfremovKLZOP = lzop 5358dfb61dcSDenis EfremovLZMA = lzma 5368dfb61dcSDenis EfremovLZ4 = lz4c 5378dfb61dcSDenis EfremovXZ = xz 53848f7ddf7SNick TerrellZSTD = zstd 5398dfb61dcSDenis Efremov 5409741e07eSJiri OlsaPAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) 5419741e07eSJiri Olsa 54280a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 5436c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 5440c22be07SDouglas AndersonNOSTDINC_FLAGS := 5456588169dSSam RavnborgCFLAGS_MODULE = 5462f7ab126SMiguel OjedaRUSTFLAGS_MODULE = 5476588169dSSam RavnborgAFLAGS_MODULE = 5486588169dSSam RavnborgLDFLAGS_MODULE = 5491da177e4SLinus TorvaldsCFLAGS_KERNEL = 5502f7ab126SMiguel OjedaRUSTFLAGS_KERNEL = 5511da177e4SLinus TorvaldsAFLAGS_KERNEL = 5525d4aeffbSMasahiro Yamadaexport LDFLAGS_vmlinux = 5531da177e4SLinus Torvalds 554abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 555abbf1590SDavid HowellsUSERINCLUDE := \ 5569d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 5579d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 558abbf1590SDavid Howells -I$(srctree)/include/uapi \ 5593308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 560ce6ed1c4SMasahiro Yamada -include $(srctree)/include/linux/compiler-version.h \ 561abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 562abbf1590SDavid Howells 5631da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 5641da177e4SLinus Torvalds# Needed to be compatible with the O= option 565abbf1590SDavid HowellsLINUXINCLUDE := \ 5669d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 5679d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 568051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 569f8224f7fSMasahiro Yamada -I$(objtree)/include \ 570f8224f7fSMasahiro Yamada $(USERINCLUDE) 5711da177e4SLinus Torvalds 57242a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 573eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 57442a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 575b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 576172aad81SOlaf Hering -Werror=return-type -Wno-format-security \ 577e8c07082SArnd Bergmann -std=gnu11 578433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 5792f7ab126SMiguel OjedaKBUILD_RUSTFLAGS := $(rust_common_flags) \ 5802f7ab126SMiguel Ojeda --target=$(objtree)/rust/target.json \ 5812f7ab126SMiguel Ojeda -Cpanic=abort -Cembed-bitcode=n -Clto=n \ 5822f7ab126SMiguel Ojeda -Cforce-unwind-tables=n -Ccodegen-units=1 \ 5832f7ab126SMiguel Ojeda -Csymbol-mangling-version=v0 \ 5842f7ab126SMiguel Ojeda -Crelocation-model=static \ 5852f7ab126SMiguel Ojeda -Zfunction-sections=n \ 5862f7ab126SMiguel Ojeda -Dclippy::float_arithmetic 5872f7ab126SMiguel Ojeda 58880c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 58980c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 5902f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL := 5916588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 5926588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 5932f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_MODULE := --cfg MODULE 59410df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 595d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 5965241ab4cSMasahiro YamadaCLANG_FLAGS := 5971da177e4SLinus Torvalds 5982f7ab126SMiguel Ojedaifeq ($(KBUILD_CLIPPY),1) 5992f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY_QUIET := CLIPPY 6002f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 6012f7ab126SMiguel Ojedaelse 6022f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY_QUIET := RUSTC 6032f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY = $(RUSTC) 6042f7ab126SMiguel Ojedaendif 6052f7ab126SMiguel Ojeda 6062f7ab126SMiguel Ojedaifdef RUST_LIB_SRC 6072f7ab126SMiguel Ojeda export RUST_LIB_SRC 6082f7ab126SMiguel Ojedaendif 6092f7ab126SMiguel Ojeda 6102f7ab126SMiguel Ojeda# Allows the usage of unstable features in stable compilers. 6112f7ab126SMiguel Ojedaexport RUSTC_BOOTSTRAP := 1 6122f7ab126SMiguel Ojeda 613d5ea4fecSChun-Tse Shaoexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 6142f7ab126SMiguel Ojedaexport RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO 6152f7ab126SMiguel Ojedaexport HOSTRUSTC KBUILD_HOSTRUSTFLAGS 616d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 617d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 61848f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 6197bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 620f67695c9SElliot Bermanexport KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 6211da177e4SLinus Torvalds 622d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 6230e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 6242f7ab126SMiguel Ojedaexport KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE 625222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 6262f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE 6272f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL 6289741e07eSJiri Olsaexport PAHOLE_FLAGS 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds# Files to ignore in find ... statements 6311da177e4SLinus Torvalds 632ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 633ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 634ae63b2d7SPrarit Bhargava -prune -o 635450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 636450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds# =========================================================================== 6391da177e4SLinus Torvalds# Rules shared between *config targets and build targets 6401da177e4SLinus Torvalds 641312a3d09SCao jin# Basic helpers built in scripts/basic/ 6424f193362SPaul SmithPHONY += scripts_basic 6431da177e4SLinus Torvaldsscripts_basic: 6441da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 6451da177e4SLinus Torvalds 6464f193362SPaul SmithPHONY += outputmakefile 6472728fcfaSMasahiro Yamadaifdef building_out_of_srctree 648e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 649fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 650fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 651fd5f0cd6SJan Beulich# output directory. 6523a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 6533a51ff34SVladimir Kondratiev# ignore whole output directory 6542728fcfaSMasahiro Yamada 6552728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN Makefile 6562728fcfaSMasahiro Yamada cmd_makefile = { \ 6572728fcfaSMasahiro Yamada echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ 6582728fcfaSMasahiro Yamada echo "include $(srctree)/Makefile"; \ 6592728fcfaSMasahiro Yamada } > Makefile 6602728fcfaSMasahiro Yamada 6611da177e4SLinus Torvaldsoutputmakefile: 6624b098659SMasahiro Yamada @if [ -f $(srctree)/.config -o \ 663e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 664e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 665e8e83a23SMasahiro Yamada echo >&2 "***"; \ 666e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 667e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 668e8e83a23SMasahiro Yamada echo >&2 "***"; \ 669e8e83a23SMasahiro Yamada false; \ 670e8e83a23SMasahiro Yamada fi 67192979997SAndi Kleen $(Q)ln -fsn $(srctree) source 6722728fcfaSMasahiro Yamada $(call cmd,makefile) 673156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 674156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 675fd5f0cd6SJan Beulichendif 6761da177e4SLinus Torvalds 677db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 678db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 679db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 680db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade. 6816072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 682db07562aSNick Desaulniers 683db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 6846f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang 685ae6b289aSChris Friesendif 686ae6b289aSChris Fries 68757fd251cSMasahiro Yamada# Include this also for config targets because some architectures need 68857fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE. 689805b2e1dSMasahiro Yamadaifdef need-compiler 69057fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler 691805b2e1dSMasahiro Yamadaendif 69257fd251cSMasahiro Yamada 6932042b548SMasahiro Yamadaifdef config-build 6941da177e4SLinus Torvalds# =========================================================================== 6951da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 6961da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 6991da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 7001da177e4SLinus Torvalds# used for 'make defconfig' 7013204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 702315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 7031da177e4SLinus Torvalds 70436de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 70531110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 70631110ebbSSam Ravnborg 70736de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 7081da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 7091da177e4SLinus Torvalds 7102042b548SMasahiro Yamadaelse #!config-build 7111da177e4SLinus Torvalds# =========================================================================== 7121da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 7131da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 7141da177e4SLinus Torvalds 7152c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 716121c2a13SMasahiro Yamada# but instead __all depend on modules 7172c1f4f12SMasahiro YamadaPHONY += all 7182c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 719121c2a13SMasahiro Yamada__all: all 7202c1f4f12SMasahiro Yamadaelse 721121c2a13SMasahiro Yamada__all: modules 7222c1f4f12SMasahiro Yamadaendif 7232c1f4f12SMasahiro Yamada 72432164845SMasahiro Yamadatargets := 72532164845SMasahiro Yamada 7262c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 7272c1f4f12SMasahiro Yamada# Normally, just do built-in. 7282c1f4f12SMasahiro Yamada 7292c1f4f12SMasahiro YamadaKBUILD_MODULES := 7302c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 7312c1f4f12SMasahiro Yamada 7322c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 7332c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 7344b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 7352c1f4f12SMasahiro Yamadaendif 7362c1f4f12SMasahiro Yamada 7372c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 7382c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 7392c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 7402c1f4f12SMasahiro Yamada 7416ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) 7422c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 7432c1f4f12SMasahiro Yamadaendif 7442c1f4f12SMasahiro Yamada 7452c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 7462c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 7472c1f4f12SMasahiro Yamadaendif 7482c1f4f12SMasahiro Yamada 7492c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 7502c1f4f12SMasahiro Yamada 7512042b548SMasahiro Yamadaifdef need-config 752d93a18f2SMasahiro Yamadainclude include/config/auto.conf 753d93a18f2SMasahiro Yamadaendif 754d93a18f2SMasahiro Yamada 7551da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 7561da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 7575750121aSMasahiro Yamadacore-y := 7585750121aSMasahiro Yamadadrivers-y := 7591da177e4SLinus Torvaldslibs-y := lib/ 7601da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 7611da177e4SLinus Torvalds 762315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 763315bab4eSMasahiro Yamada# command line. 764315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 765315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 766315bab4eSMasahiro Yamadaall: vmlinux 767315bab4eSMasahiro Yamada 7687d73c3e9SNick DesaulniersCFLAGS_GCOV := -fprofile-arcs -ftest-coverage 7697d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 7707d73c3e9SNick DesaulniersCFLAGS_GCOV += -fno-tree-loop-im 7717d73c3e9SNick Desaulniersendif 7725aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 773315bab4eSMasahiro Yamada 774b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 775b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 776b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 777b1f4ff74SPaulo Zanoniendif 778b1f4ff74SPaulo Zanoni 7793204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 780315bab4eSMasahiro Yamada 7812042b548SMasahiro Yamadaifdef need-config 7822042b548SMasahiro Yamadaifdef may-sync-config 783315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 784315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 785315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 786d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 7871da177e4SLinus Torvalds 78805850719SMasahiro Yamada$(KCONFIG_CONFIG): 78905850719SMasahiro Yamada @echo >&2 '***' 79005850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 79105850719SMasahiro Yamada @echo >&2 '***' 79205850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 79305850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 79405850719SMasahiro Yamada @echo >&2 '***' 79505850719SMasahiro Yamada @/bin/false 7961da177e4SLinus Torvalds 79761277981SUlf Magnusson# The actual configuration files used during the build are stored in 79861277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 79961277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 8009390dff6SMasahiro Yamada# 8019390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 8029390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 803f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 804d952cfafSMasahiro Yamada# 805d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 806d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input. 8072f7ab126SMiguel Ojeda%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) 808d952cfafSMasahiro Yamada $(Q)$(kecho) " SYNC $@" 809d952cfafSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 8102042b548SMasahiro Yamadaelse # !may-sync-config 811d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 812d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 813d7942413SMasahiro Yamada# Use auto.conf to trigger the test 8149ee4e336SSam RavnborgPHONY += include/config/auto.conf 8159ee4e336SSam Ravnborg 8169ee4e336SSam Ravnborginclude/config/auto.conf: 8174b098659SMasahiro Yamada @test -e include/generated/autoconf.h -a -e $@ || ( \ 8185369f550SMichal Marek echo >&2; \ 8195369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 8205369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 8215369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 8225369f550SMichal Marek echo >&2 ; \ 8239ee4e336SSam Ravnborg /bin/false) 8249ee4e336SSam Ravnborg 825d7942413SMasahiro Yamadaendif # may-sync-config 8262042b548SMasahiro Yamadaendif # need-config 8271da177e4SLinus Torvalds 8287d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-delete-null-pointer-checks 829ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 830bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 831bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 8326f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 833a1c48bb1SGeert Uytterhoeven 83415f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 835a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 8362f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=2 83715f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 83815f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 8392f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=s 8401da177e4SLinus Torvaldsendif 8411da177e4SLinus Torvalds 8422f7ab126SMiguel Ojeda# Always set `debug-assertions` and `overflow-checks` because their default 8432f7ab126SMiguel Ojeda# depends on `opt-level` and `debug-assertions`, respectively. 8442f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) 8452f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) 8462f7ab126SMiguel Ojeda 84769102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 8487d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 8497d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to 8507d73c3e9SNick Desaulniers# -fno-allow-store-data-races. 85169102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 852b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 8537d73c3e9SNick Desaulniersendif 85469102311SJiri Kosina 8551873e870SAndi Kleenifdef CONFIG_READABLE_ASM 8561873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 8571873e870SAndi Kleen# reorder blocks reorders the control in the function 8581873e870SAndi Kleen# ipa clone creates specialized cloned functions 8591873e870SAndi Kleen# partial inlining inlines only parts of functions 8607d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 8611873e870SAndi Kleenendif 8621873e870SAndi Kleen 86308f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 864a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 86535bb5b1eSAndi Kleenendif 86635bb5b1eSAndi Kleen 867893ab004SMasahiro Yamadastackp-flags-y := -fno-stack-protector 868050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 869050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 8702a61f474SMasahiro Yamada 8712a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 872e06b8b98SSam Ravnborg 873efa80b02SMasahiro YamadaKBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror 874efa80b02SMasahiro YamadaKBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y) 875f0be87c4SLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds 8763fe617ccSLinus Torvalds 8772f7ab126SMiguel OjedaKBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings 8782f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) 8792f7ab126SMiguel Ojeda 880076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 881a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 882e8c07082SArnd Bergmann# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. 883a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 884d936eb23SLinus Torvaldselse 885d936eb23SLinus Torvalds 88649832c81SRandy Dunlap# gcc inanely warns about local variables called 'main' 88749832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main 888cfe17c9bSMasahiro Yamadaendif 889cfe17c9bSMasahiro Yamada 890885480b0SNathan Chancellor# These warnings generated too much noise in a regular build. 891885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 892885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 8930a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 8946272cc38SNathan Chancellor 89549beadbdSLinus Torvalds# These result in bogus false positives 89649beadbdSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) 89749beadbdSLinus Torvalds 8981da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 899a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 9002f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 9011da177e4SLinus Torvaldselse 9027e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 9037e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 9047e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 9057e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 9067e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 9072f7ab126SMiguel Ojeda# In the Rust target specification, "frame-pointer" is set explicitly 9082f7ab126SMiguel Ojeda# to "may-omit". 9097e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 910a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 9111da177e4SLinus Torvaldsendif 9127e9501fdSRabin Vincentendif 9131da177e4SLinus Torvalds 914f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern. 915f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN 916709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 917709a972eSKees Cookendif 918709a972eSKees Cook 919f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value. 920f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO 921f0fe00d4Sglider@google.comKBUILD_CFLAGS += -ftrivial-auto-var-init=zero 922607e57c6SKees Cookifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 923607e57c6SKees Cook# https://github.com/llvm/llvm-project/issues/44842 924f0fe00d4Sglider@google.comKBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 925f0fe00d4Sglider@google.comendif 926f02003c8SKees Cookendif 927f0fe00d4Sglider@google.com 92839218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes 92939218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers. 93039218ff4SKees CookKBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 93139218ff4SKees Cook 932a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 933a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS 934a82adfd5SKees CookKBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 935a82adfd5SKees Cookendif 936a82adfd5SKees Cook 937606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 9383b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC 93907d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 9402f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 9412f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 9422f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 9432f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 9442f4df001SVasily Gorbik endif 9452f4df001SVasily Gorbik endif 94607d04081SVasily Gorbikendif 94722c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 94822c8542dSSami Tolvanen CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 94922c8542dSSami Tolvanenendif 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 981d08b9f0cSSami TolvanenCC_FLAGS_SCS := -fsanitize=shadow-call-stack 982d08b9f0cSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_SCS) 983d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS 984d08b9f0cSSami Tolvanenendif 985d08b9f0cSSami Tolvanen 986dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG 987dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN 9882b868952SAlexander LobakinCC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 9897f69180bSMasahiro YamadaKBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache 990dc5723b0SSami Tolvanenelse 9912b868952SAlexander LobakinCC_FLAGS_LTO := -flto 992dc5723b0SSami Tolvanenendif 993dc5723b0SSami TolvanenCC_FLAGS_LTO += -fvisibility=hidden 99422d429e7SSami Tolvanen 99522d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size 99622d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5 99724845dcbSNick Desaulniers 9980236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion 9990236526dSTor Vic# when using lld < 13.0.0. 100024845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0) 1001fccb3d3eSMasahiro Yamadaifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y) 100224845dcbSNick DesaulniersKBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) 100324845dcbSNick Desaulniersendif 1004dc5723b0SSami Tolvanenendif 10050236526dSTor Vicendif 1006dc5723b0SSami Tolvanen 1007dc5723b0SSami Tolvanenifdef CONFIG_LTO 10085e95325fSSami TolvanenKBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 10095e95325fSSami TolvanenKBUILD_AFLAGS += -fno-lto 1010dc5723b0SSami Tolvanenexport CC_FLAGS_LTO 1011dc5723b0SSami Tolvanenendif 1012dc5723b0SSami Tolvanen 1013cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG 101489245600SSami TolvanenCC_FLAGS_CFI := -fsanitize=kcfi 1015cf68fffbSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_CFI) 1016cf68fffbSSami Tolvanenexport CC_FLAGS_CFI 1017cf68fffbSSami Tolvanenendif 1018cf68fffbSSami Tolvanen 1019cf536e18SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B 1020cf536e18SFeng TangKBUILD_CFLAGS += -falign-functions=64 102109c60546SFeng Tangendif 102209c60546SFeng Tang 1023e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 102404e85bbfSAlexey DobriyanNOSTDINC_FLAGS += -nostdinc 1025e8e69931SSam Ravnborg 10261da177e4SLinus Torvalds# warn about C99 declaration after statement 1027a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 10281da177e4SLinus Torvalds 10290bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 10308289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 10310bb95f80SKees Cook 1032070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 1033fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 10341da177e4SLinus Torvalds 1035552a23a0SGustavo A. R. Silva# In order to make sure new function cast mismatches are not introduced 1036552a23a0SGustavo A. R. Silva# in the kernel (to avoid tripping CFI checking), the kernel should be 1037552a23a0SGustavo A. R. Silva# globally built with -Wcast-function-type. 1038552a23a0SGustavo A. R. SilvaKBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) 1039552a23a0SGustavo A. R. Silva 1040217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 1041217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 1042217c3e01SStephen Rothwell 10435c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 10445a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 10455c45de21SLinus Torvalds 1046adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 1047adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 1048adc71920SLinus Torvalds 104978a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 10507d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 10517d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized 10527d73c3e9SNick Desaulniersendif 105378a5255fSLinus Torvalds 105486cffecdSKees Cook# The allocators already balk at large sizes, so silence the compiler 105586cffecdSKees Cook# warnings for bounds checks involving those possible values. While 105686cffecdSKees Cook# -Wno-alloc-size-larger-than would normally be used here, earlier versions 105786cffecdSKees Cook# of gcc (<9.1) weirdly don't handle the option correctly when _other_ 105886cffecdSKees Cook# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX 105986cffecdSKees Cook# doesn't work (as it is documented to), silently resolving to "0" prior to 106086cffecdSKees Cook# version 9.1 (and producing an error more recently). Numeric values larger 106186cffecdSKees Cook# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently 106286cffecdSKees Cook# ignored, continuing to default to PTRDIFF_MAX. So, left with no other 106386cffecdSKees Cook# choice, we must perform a versioned check to disable this warning. 106486cffecdSKees Cook# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au 106588b61e3bSNick DesaulniersKBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than 106688b61e3bSNick DesaulniersKBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) 106786cffecdSKees Cook 1068fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 10698b42cf2fSMasahiro YamadaKBUILD_CFLAGS += -fno-strict-overflow 1070d0115552SLinus Torvalds 10713ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 10727d4eb0d8SMasahiro YamadaKBUILD_CFLAGS += -fno-stack-check 10733ce120b1SLinus Torvalds 10748f7f5c9fSAndi Kleen# conserve stack if available 10757d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 10767d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fconserve-stack 10777d73c3e9SNick Desaulniersendif 10788f7f5c9fSAndi Kleen 1079fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 108087de84c9SMasahiro YamadaKBUILD_CFLAGS += -Werror=date-time 1081fe7c36c7SJosh Triplett 1082ea8daa7bSDaniel Wagner# enforce correct pointer usage 1083ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 1084ea8daa7bSDaniel Wagner 1085c834f0e8SKees Cook# Require designated initializers for all marked structures 1086c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 1087c834f0e8SKees Cook 1088a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 1089a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 1090a73619a8SMasahiro Yamada 1091e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed 1092e0fe0bbeSMasahiro Yamadainclude-y := scripts/Makefile.extrawarn 10936947fd96SMasahiro Yamadainclude-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1094e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN) += scripts/Makefile.kasan 1095e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1096f80be457SAlexander Potapenkoinclude-$(CONFIG_KMSAN) += scripts/Makefile.kmsan 1097e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1098e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV) += scripts/Makefile.kcov 1099613f4b3eSKees Cookinclude-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1100e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1101e0fe0bbeSMasahiro Yamada 1102e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y)) 1103a86fe353SMasahiro Yamada 1104132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last. 1105132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel 1106132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point. 1107bf5438fcSJason Baron 11082f7ab126SMiguel Ojeda# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments 11098cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 11108cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 11118cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 11122f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KRUSTFLAGS) 111352bcc330SSam Ravnborg 1114a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1 1115a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1 111618991197SRoland McGrath 11170d362be5SNick DesaulniersKBUILD_LDFLAGS += -z noexecstack 11180d362be5SNick Desaulniersifeq ($(CONFIG_LD_IS_BFD),y) 11190d362be5SNick DesaulniersKBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 11200d362be5SNick Desaulniersendif 11210d362be5SNick Desaulniers 11225d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 11230f1fe9d6SMasahiro YamadaLDFLAGS_vmlinux += -X 11245d7d18f5SDavid Howellsendif 11255d7d18f5SDavid Howells 11265cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 112727f2a4dbSNick DesaulniersLDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags 11285cf896fbSPeter Collingbourneendif 11295cf896fbSPeter Collingbourne 113059612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the 113159612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script. 113259612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN 113359612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn 113459612b24SNathan Chancellorendif 113559612b24SNathan Chancellor 11367f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 11377f58b487SMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 11387f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 11397f3a59dbSMasahiro Yamada 114080591e61SLuc Van Oostenryck# make the checker run with the right architecture 114180591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 114280591e61SLuc Van Oostenryck 114314516765SLuc Van Oostenryck# insure the checker run with the right endianness 114414516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 114514516765SLuc Van Oostenryck 11461f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 11471f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 11481f2f01b1SLuc Van Oostenryck 11491da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 11501da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 11511da177e4SLinus Torvalds# set in the environment 11521da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 11531da177e4SLinus Torvalds# this default value 11541da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 11551da177e4SLinus Torvalds 11561da177e4SLinus Torvalds# 11571da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 11581da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 11591da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 11601da177e4SLinus Torvalds 11611da177e4SLinus Torvalds# 1162f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1163f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1164f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 1165f4d4ffc0SJason Cooper# 1166f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1167f4d4ffc0SJason Cooper 1168f4d4ffc0SJason Cooper# 11691da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 11701da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 1171070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 11721da177e4SLinus Torvalds# 11731da177e4SLinus Torvalds 1174df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 11751da177e4SLinus Torvaldsexport MODLIB 11761da177e4SLinus Torvalds 1177e00d8880SMasahiro YamadaPHONY += prepare0 1178e2a666d5SRusty Russell 1179ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 11807f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order 11817f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps 118247801c97SMasahiro Yamada 11831da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 11841da177e4SLinus Torvalds 11855750121aSMasahiro Yamadabuild-dir := . 11865750121aSMasahiro Yamadaclean-dirs := $(sort . Documentation \ 118723febe37SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(core-) \ 118895fb6317SMasahiro Yamada $(drivers-) $(libs-)))) 11891da177e4SLinus Torvalds 11905750121aSMasahiro Yamadaexport ARCH_CORE := $(core-y) 11915750121aSMasahiro Yamadaexport ARCH_LIB := $(filter %/, $(libs-y)) 11925750121aSMasahiro Yamadaexport ARCH_DRIVERS := $(drivers-y) $(drivers-m) 11931f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 11945750121aSMasahiro Yamada 119532164845SMasahiro YamadaKBUILD_VMLINUX_OBJS := ./built-in.a 1196f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES 1197f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1198f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1199f0d50ca0SMasahiro Yamadaelse 1200f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1201f0d50ca0SMasahiro Yamadaendif 1202f0d50ca0SMasahiro Yamada 120332164845SMasahiro Yamadaexport KBUILD_VMLINUX_LIBS 120495698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 12051da177e4SLinus Torvalds 12063fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 12073fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 12082441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 12091f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 12101f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 12111f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 12121f50b80aSMasahiro YamadaKBUILD_MODULES := 1 1213fb2d99beSMasahiro Yamada 12145750121aSMasahiro Yamadaautoksyms_recursive: $(build-dir) modules.order 1215fb2d99beSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 121653632ba8SMasahiro Yamada "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive" 12171f50b80aSMasahiro Yamadaendif 12181f50b80aSMasahiro Yamada 121907a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 122007a422bbSMasahiro Yamada 122188694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 122288694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 122388694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 122488694cffSQuentin Perret 122507a422bbSMasahiro Yamada$(autoksyms_h): 122688694cffSQuentin Perret $(call cmd,autoksyms_h) 122723121ca2SNicolas Pitre 122832164845SMasahiro Yamada# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 122932164845SMasahiro Yamadaquiet_cmd_ar_vmlinux.a = AR $@ 123032164845SMasahiro Yamada cmd_ar_vmlinux.a = \ 123132164845SMasahiro Yamada rm -f $@; \ 123232164845SMasahiro Yamada $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ 1233fb3041d6SMasahiro Yamada $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) 1234fbe6e37dSNicholas Piggin 123532164845SMasahiro Yamadatargets += vmlinux.a 1236ce697cceSMasahiro Yamadavmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt autoksyms_recursive FORCE 123732164845SMasahiro Yamada $(call if_changed,ar_vmlinux.a) 12382441e78bSNicolas Pitre 12397a342e6cSMasahiro YamadaPHONY += vmlinux_o 12407a342e6cSMasahiro Yamadavmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 12419c5a0ac3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o 1242741f98feSSam Ravnborg 12437a342e6cSMasahiro Yamadavmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o 12447a342e6cSMasahiro Yamada @: 12457a342e6cSMasahiro Yamada 12465d4aeffbSMasahiro YamadaPHONY += vmlinux 12475d4aeffbSMasahiro Yamadavmlinux: vmlinux.o $(KBUILD_LDS) modpost 12485d4aeffbSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux 1249392885eeSMasahiro Yamada 12501da177e4SLinus Torvalds# The actual objects are generated when descending, 12511da177e4SLinus Torvalds# make sure no implicit rule kicks in 12529c5a0ac3SMasahiro Yamada$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; 12531da177e4SLinus Torvalds 1254ba97df45SMasahiro Yamadafilechk_kernel.release = \ 12550d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 12560d0e7718SMichal Marek 125783a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 125824512795SMasahiro Yamadainclude/config/kernel.release: FORCE 12590d0e7718SMichal Marek $(call filechk,kernel.release) 1260cb58455cSSam Ravnborg 1261d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1262d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1263d8821622SMasahiro Yamada# in parallel 1264d8821622SMasahiro YamadaPHONY += scripts 126560df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1266d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1267cb58455cSSam Ravnborg 12681da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 12695bb78269SSam Ravnborg# or the modules are listed in "prepare". 12705bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 12715bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 12725bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 12731da177e4SLinus Torvalds 1274a5139fb3SMasahiro YamadaPHONY += prepare archprepare 12755bb78269SSam Ravnborg 127636de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 12773044dd05SMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 1278a55f283eSMasahiro Yamada include/generated/compile.h include/generated/autoconf.h remove-stale-files 12795bb78269SSam Ravnborg 128065bba042SMasahiro Yamadaprepare0: archprepare 128160df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 1282ed7ceac1SMasahiro Yamada $(Q)$(MAKE) $(build)=. prepare 128386feeaa8SSam Ravnborg 12841da177e4SLinus Torvalds# All the preparing.. 12850d989ac2SMasahiro Yamadaprepare: prepare0 12862f7ab126SMiguel Ojedaifdef CONFIG_RUST 12872f7ab126SMiguel Ojeda $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v 12882f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust 12892f7ab126SMiguel Ojedaendif 1290b9ab5ebbSJosh Poimboeuf 12911476fee5SMasahiro YamadaPHONY += remove-stale-files 12921476fee5SMasahiro Yamadaremove-stale-files: 12931476fee5SMasahiro Yamada $(Q)$(srctree)/scripts/remove-stale-files 12941476fee5SMasahiro Yamada 12952c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 12967d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 12977d0e5c20SMasahiro Yamada 12982c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 12992c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1300037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1301037fc336SMasahiro Yamada generic=include/asm-generic 13022c1f4f12SMasahiro Yamadauapi-asm-generic: 1303037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1304037fc336SMasahiro Yamada generic=include/uapi/asm-generic 13052c1f4f12SMasahiro Yamada 13061da177e4SLinus Torvalds# Generate some files 13071da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13081da177e4SLinus Torvalds 13091da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 13101da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 13111da177e4SLinus Torvalds 13121da177e4SLinus Torvaldsuts_len := 64 131363104eecSSam Ravnborgdefine filechk_utsrelease.h 13141da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 13151da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 13161da177e4SLinus Torvalds exit 1; \ 13171da177e4SLinus Torvalds fi; \ 1318ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 13191da177e4SLinus Torvaldsendef 13201da177e4SLinus Torvalds 132163104eecSSam Ravnborgdefine filechk_version.h 13229b82f13eSSasha Levin if [ $(SUBLEVEL) -gt 255 ]; then \ 1323ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 1324207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 13259b82f13eSSasha Levin else \ 13269b82f13eSSasha Levin echo \#define LINUX_VERSION_CODE $(shell \ 1327207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 13289b82f13eSSasha Levin fi; \ 13299b82f13eSSasha Levin echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 133088a68672SSasha Levin ((c) > 255 ? 255 : (c)))'; \ 133188a68672SSasha Levin echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 133288a68672SSasha Levin echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 133388a68672SSasha Levin echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 133463104eecSSam Ravnborgendef 133563104eecSSam Ravnborg 13365c816641SMasahiro Yamada$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) 13375c816641SMasahiro Yamada$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) 133843fee2b2SMasahiro Yamada$(version_h): FORCE 13391da177e4SLinus Torvalds $(call filechk,version.h) 13401da177e4SLinus Torvalds 1341273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 134263104eecSSam Ravnborg $(call filechk,utsrelease.h) 134363104eecSSam Ravnborg 1344a55f283eSMasahiro Yamadafilechk_compile.h = $(srctree)/scripts/mkcompile_h \ 1345a55f283eSMasahiro Yamada "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" 1346a55f283eSMasahiro Yamada 1347a55f283eSMasahiro Yamadainclude/generated/compile.h: FORCE 1348a55f283eSMasahiro Yamada $(call filechk,compile.h) 1349a55f283eSMasahiro Yamada 1350179efcb4SVegard NossumPHONY += headerdep 1351179efcb4SVegard Nossumheaderdep: 13529663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 13539663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1354179efcb4SVegard Nossum 13551da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13568d730cfbSDavid Woodhouse# Kernel headers 13578d730cfbSDavid Woodhouse 1358e6883b18SSam Ravnborg#Default location for installed headers 1359e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1360e6883b18SSam Ravnborg 136159b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 136259b2bd05SMasahiro Yamada cmd_headers_install = \ 136359b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 136459b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 136559b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 13666d716275SDavid Woodhouse 13678d730cfbSDavid WoodhousePHONY += headers_install 136859b2bd05SMasahiro Yamadaheaders_install: headers 136959b2bd05SMasahiro Yamada $(call cmd,headers_install) 13704f193362SPaul Smith 13711da177e4SLinus TorvaldsPHONY += archheaders archscripts 13721da177e4SLinus Torvalds 1373a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 13741da177e4SLinus Torvalds 137559b2bd05SMasahiro YamadaPHONY += headers 137659b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 13771b620d53SMasahiro Yamada $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) 1378d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1379d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 13801f85712eSMike Frysinger 1381e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 138259b2bd05SMasahiro Yamadaprepare: headers 1383e949f4c2SMasahiro Yamadaendif 138468475359SDavid Woodhouse 1385bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1386bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1387bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1388bdd7714bSMasahiro Yamada 13898d730cfbSDavid Woodhouse# --------------------------------------------------------------------------- 139014ccc638SMasahiro Yamada# Install 139114ccc638SMasahiro Yamada 139214ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel. 139375ef3122SRandy Dunlap# If DKMS is installed, 'make install' will eventually recurse back 139475ef3122SRandy Dunlap# to this Makefile to build and install external modules. 139514ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 139614ccc638SMasahiro Yamada 1397f774f5bbSMasahiro Yamadaquiet_cmd_install = INSTALL $(INSTALL_PATH) 1398f774f5bbSMasahiro Yamada cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 139914ccc638SMasahiro Yamada 140014ccc638SMasahiro Yamada# --------------------------------------------------------------------------- 14011bb0b18aSMasahiro Yamada# Tools 14021bb0b18aSMasahiro Yamada 140303f16cd0SJosh Poimboeufifdef CONFIG_OBJTOOL 14040d989ac2SMasahiro Yamadaprepare: tools/objtool 14050d989ac2SMasahiro Yamadaendif 14060d989ac2SMasahiro Yamada 14070d989ac2SMasahiro Yamadaifdef CONFIG_BPF 14080d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF 14090d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids 14100d989ac2SMasahiro Yamadaendif 14110d989ac2SMasahiro Yamadaendif 14120d989ac2SMasahiro Yamada 14130d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean 14140d989ac2SMasahiro Yamada 14150d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 14160d989ac2SMasahiro Yamada 14170d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist 14180d989ac2SMasahiro Yamada# in output directory, skip its clean in that case 14190d989ac2SMasahiro Yamadaresolve_btfids_clean: 14200d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),) 14210d989ac2SMasahiro Yamada $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 14220d989ac2SMasahiro Yamadaendif 14230d989ac2SMasahiro Yamada 14241bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake 14251bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_) 14261bb0b18aSMasahiro Yamadatools_silent=s 14271bb0b18aSMasahiro Yamadaendif 14281bb0b18aSMasahiro Yamada 14291bb0b18aSMasahiro Yamadatools/: FORCE 14301bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 14311bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 14321bb0b18aSMasahiro Yamada 14331bb0b18aSMasahiro Yamadatools/%: FORCE 14341bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 14351bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 14361bb0b18aSMasahiro Yamada 14371bb0b18aSMasahiro Yamada# --------------------------------------------------------------------------- 14385a5da78bSShuah Khan# Kernel selftest 14395a5da78bSShuah Khan 14405a5da78bSShuah KhanPHONY += kselftest 14414062eba9SGuillaume Tuckerkselftest: headers 14422bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 14435a5da78bSShuah Khan 14444062eba9SGuillaume Tuckerkselftest-%: headers FORCE 144517eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1446dcb825a9SWang Long 14473d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 14483d6dee7aSBamvor Jian Zhangkselftest-merge: 14493d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 14506d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 14516d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 14523e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 14533d6dee7aSBamvor Jian Zhang 14545a5da78bSShuah Khan# --------------------------------------------------------------------------- 145537c8a5faSRob Herring# Devicetree files 145637c8a5faSRob Herring 145737c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 145837c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 145937c8a5faSRob Herringendif 146037c8a5faSRob Herring 146137c8a5faSRob Herringifneq ($(dtstree),) 146237c8a5faSRob Herring 1463ee476203SMasahiro Yamada%.dtb: dtbs_prepare 146475e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 146537c8a5faSRob Herring 1466ee476203SMasahiro Yamada%.dtbo: dtbs_prepare 146775e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1468ce88c9c7SViresh Kumar 1469ee476203SMasahiro YamadaPHONY += dtbs dtbs_prepare dtbs_install dtbs_check 1470ee476203SMasahiro Yamadadtbs: dtbs_prepare 147137c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 147237c8a5faSRob Herring 1473ee476203SMasahiro Yamada# include/config/kernel.release is actually needed when installing DTBs because 1474ee476203SMasahiro Yamada# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make 1475ee476203SMasahiro Yamada# dtbs_install depend on it as dtbs_install may run as root. 1476ee476203SMasahiro Yamadadtbs_prepare: include/config/kernel.release scripts_dtc 1477ee476203SMasahiro Yamada 147875e89534SRob Herringifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1479e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1480b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1481b5154bf6SMasahiro Yamadaendif 1482b5154bf6SMasahiro Yamada 1483b5154bf6SMasahiro Yamadadtbs_check: dtbs 14844f0e3a57SRob Herring 148537c8a5faSRob Herringdtbs_install: 14862431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 148737c8a5faSRob Herring 148837c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 148937c8a5faSRob Herringall: dtbs 149037c8a5faSRob Herringendif 149137c8a5faSRob Herring 149237c8a5faSRob Herringendif 149337c8a5faSRob Herring 149437c8a5faSRob HerringPHONY += scripts_dtc 149537c8a5faSRob Herringscripts_dtc: scripts_basic 149637c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 149737c8a5faSRob Herring 1498e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1499e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1500e10c4321SMasahiro Yamadaendif 1501e10c4321SMasahiro Yamada 1502c473a8d0SMasahiro YamadaPHONY += dt_binding_check 15034f0e3a57SRob Herringdt_binding_check: scripts_dtc 15044f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 15054f0e3a57SRob Herring 1506b6acf807SRob HerringPHONY += dt_compatible_check 1507b6acf807SRob Herringdt_compatible_check: dt_binding_check 1508b6acf807SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ 1509b6acf807SRob Herring 151037c8a5faSRob Herring# --------------------------------------------------------------------------- 15111da177e4SLinus Torvalds# Modules 15121da177e4SLinus Torvalds 15131da177e4SLinus Torvaldsifdef CONFIG_MODULES 15141da177e4SLinus Torvalds 15151da177e4SLinus Torvalds# By default, build modules as well 15161da177e4SLinus Torvalds 151773d1393eSMichal Marekall: modules 15181da177e4SLinus Torvalds 15194b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider 15204b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to 15214b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them. 15224b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS 15234b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 1 15244b50c8c4SMasahiro Yamadaendif 15254b50c8c4SMasahiro Yamada 15261da177e4SLinus Torvalds# Build modules 1527551559e1STejun Heo# 15281da177e4SLinus Torvalds 1529f73edc89SMasahiro Yamada# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFOBTF_MODULES 1530f73edc89SMasahiro Yamada# is an exception. 1531f73edc89SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF_MODULES 1532f73edc89SMasahiro Yamadamodules: vmlinux 1533f73edc89SMasahiro Yamadaendif 15341da177e4SLinus Torvalds 1535f73edc89SMasahiro Yamadamodules: modules_prepare 1536a6c36632SMichal Marek 15371da177e4SLinus Torvalds# Target to prepare building external modules 1538059bc9fcSMasahiro Yamadamodules_prepare: prepare 1539596b0474SMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/module.lds 15401da177e4SLinus Torvalds 1541961ab4a3SMasahiro Yamadaexport modules_sign_only := 15421da177e4SLinus Torvalds 1543961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y) 1544961ab4a3SMasahiro YamadaPHONY += modules_sign 1545961ab4a3SMasahiro Yamadamodules_sign: modules_install 1546961ab4a3SMasahiro Yamada @: 1547961ab4a3SMasahiro Yamada 1548961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install. 1549961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 1550961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),) 1551961ab4a3SMasahiro Yamadamodules_sign_only := y 1552961ab4a3SMasahiro Yamadaendif 1553961ab4a3SMasahiro Yamadaendif 1554961ab4a3SMasahiro Yamada 1555961ab4a3SMasahiro Yamadamodinst_pre := 1556961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),) 1557961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre 1558961ab4a3SMasahiro Yamadaendif 1559961ab4a3SMasahiro Yamada 1560961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre) 15613e3005dfSMasahiro YamadaPHONY += __modinst_pre 15623e3005dfSMasahiro Yamada__modinst_pre: 15631da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 15641da177e4SLinus Torvalds @rm -f $(MODLIB)/source 15651da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 15668e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 15671da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 15681da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 15697e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 15701da177e4SLinus Torvalds fi 1571f65a4868SMasahiro Yamada @sed 's:^\(.*\)\.o$$:kernel/\1.ko:' modules.order > $(MODLIB)/modules.order 15722c6d9636SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 15732c6d9636SMasahiro Yamada @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 15741da177e4SLinus Torvalds 15751da177e4SLinus Torvaldsendif # CONFIG_MODULES 15761da177e4SLinus Torvalds 15771da177e4SLinus Torvalds### 15781da177e4SLinus Torvalds# Cleaning is done on three levels. 15791da177e4SLinus Torvalds# make clean Delete most generated files 15801da177e4SLinus Torvalds# Leave enough to build external modules 15811da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 15821da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 15831da177e4SLinus Torvalds 15841da177e4SLinus Torvalds# Directories & files removed with 'make clean' 158569bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ 15863d32285fSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps \ 15878afc66e8SLinus Torvalds compile_commands.json .thinlto-cache rust/test rust/doc \ 15888afc66e8SLinus Torvalds .vmlinux.objs .vmlinux.export.c 15891da177e4SLinus Torvalds 15901da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 15910663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 1592b0d6207bSMasahiro Yamada arch/$(SRCARCH)/include/generated .objdiff \ 15930663c68cSMasahiro Yamada debian snap tar-install \ 15940663c68cSMasahiro Yamada .config .config.old .version \ 159546457133SMasahiro Yamada Module.symvers \ 15965cca3606SMasahiro Yamada certs/signing_key.pem \ 1597b31f2a49SNayna Jain certs/x509.genkey \ 1598b31f2a49SNayna Jain vmlinux-gdb.py \ 15992f7ab126SMiguel Ojeda *.spec \ 16002f7ab126SMiguel Ojeda rust/target.json rust/libmacros.so 16011da177e4SLinus Torvalds 16021da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 16031da177e4SLinus Torvalds# 16041da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 16051da177e4SLinus Torvalds 160676cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 16071da177e4SLinus Torvalds 1608bd1ee804SPawel Mollvmlinuxclean: 1609bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1610fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1611bd1ee804SPawel Moll 161250d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean 16131da177e4SLinus Torvalds 16141da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 16151da177e4SLinus Torvalds# 16161da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1617cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 16181da177e4SLinus Torvalds 1619b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 16201da177e4SLinus Torvalds$(mrproper-dirs): 16211da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 16221da177e4SLinus Torvalds 1623b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 16241da177e4SLinus Torvalds $(call cmd,rmfiles) 16252f7ab126SMiguel Ojeda @find . $(RCS_FIND_IGNORE) \ 16262f7ab126SMiguel Ojeda \( -name '*.rmeta' \) \ 16272f7ab126SMiguel Ojeda -type f -print | xargs rm -f 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds# distclean 16301da177e4SLinus Torvalds# 16314f193362SPaul SmithPHONY += distclean 16321da177e4SLinus Torvalds 16331da177e4SLinus Torvaldsdistclean: mrproper 163419c8d912SMasahiro Yamada @find . $(RCS_FIND_IGNORE) \ 16351da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1636f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 16377a02cec5SMasahiro Yamada -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 16387a02cec5SMasahiro Yamada -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 16391da177e4SLinus Torvalds -type f -print | xargs rm -f 16401da177e4SLinus Torvalds 16411da177e4SLinus Torvalds 16421da177e4SLinus Torvalds# Packaging of the kernel to various formats 16431da177e4SLinus Torvalds# --------------------------------------------------------------------------- 16441da177e4SLinus Torvalds 1645bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1646000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1647031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1648000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 16491da177e4SLinus Torvalds 16501da177e4SLinus Torvalds# Brief documentation of the typical targets used 16511da177e4SLinus Torvalds# --------------------------------------------------------------------------- 16521da177e4SLinus Torvalds 16535dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1654a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 16555dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 16565dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 16571da177e4SLinus Torvalds 1658fe69b420SMasahiro YamadaPHONY += help 16591da177e4SLinus Torvaldshelp: 16601da177e4SLinus Torvalds @echo 'Cleaning targets:' 16615ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 16625cc8d246SJesper Juhl @echo ' enough build support to build external modules' 16635ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 16645cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 16651da177e4SLinus Torvalds @echo '' 16661da177e4SLinus Torvalds @echo 'Configuration targets:' 16671da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 16681da177e4SLinus Torvalds @echo '' 16691da177e4SLinus Torvalds @echo 'Other generic targets:' 16701da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 16711da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 16721da177e4SLinus Torvalds @echo '* modules - Build all modules' 16739cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 16741da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 167540ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1676433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1677433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 167862718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 167962718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1680155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1681c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 16821da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 16831da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1684f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 16853f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 16863f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 16873f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 16882fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 168959df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 16902fb9b1bdSSam Ravnborg echo '' 169131b8cc80SRandy Dunlap @echo 'Static analysers:' 16921da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1693aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1694ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1695295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 169674425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 16977f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 16986ad7cbc0SNathan Huckleberry @echo ' clang-analyzer - Check with clang static analyzer' 16996ad7cbc0SNathan Huckleberry @echo ' clang-tidy - Check with clang-tidy' 170074425eeeSNicolas Palix @echo '' 1701eb8305aeSMatthias Maennich @echo 'Tools:' 1702eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1703eb8305aeSMatthias Maennich @echo '' 170431b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1705e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 17065a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 17075a5da78bSShuah Khan @echo ' running kselftest on it' 1708e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1709e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1710e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1711dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1712e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1713e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 17145a5da78bSShuah Khan @echo '' 17152f7ab126SMiguel Ojeda @echo 'Rust targets:' 17162f7ab126SMiguel Ojeda @echo ' rustavailable - Checks whether the Rust toolchain is' 17172f7ab126SMiguel Ojeda @echo ' available and, if not, explains why.' 17182f7ab126SMiguel Ojeda @echo ' rustfmt - Reformat all the Rust code in the kernel' 17192f7ab126SMiguel Ojeda @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' 17202f7ab126SMiguel Ojeda @echo ' is formatted, printing a diff otherwise.' 17212f7ab126SMiguel Ojeda @echo ' rustdoc - Generate Rust documentation' 17222f7ab126SMiguel Ojeda @echo ' (requires kernel .config)' 17232f7ab126SMiguel Ojeda @echo ' rusttest - Runs the Rust tests' 17242f7ab126SMiguel Ojeda @echo ' (requires kernel .config; downloads external repos)' 17252f7ab126SMiguel Ojeda @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' 17262f7ab126SMiguel Ojeda @echo ' (requires kernel .config)' 17272f7ab126SMiguel Ojeda @echo ' dir/file.[os] - Build specified target only' 17282f7ab126SMiguel Ojeda @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' 17292f7ab126SMiguel Ojeda @echo ' Run with RUSTFMT=n to skip reformatting if needed.' 17302f7ab126SMiguel Ojeda @echo ' The output is not intended to be compilable.' 17312f7ab126SMiguel Ojeda @echo ' dir/file.ll - Build the LLVM assembly file' 17322f7ab126SMiguel Ojeda @echo '' 173337c8a5faSRob Herring @$(if $(dtstree), \ 173437c8a5faSRob Herring echo 'Devicetree:'; \ 173537c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 173637c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 17377aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 17387aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 173937c8a5faSRob Herring echo '') 174037c8a5faSRob Herring 174131b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 174231b8cc80SRandy Dunlap @echo ' use "make tools/help"' 174331b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 174431b8cc80SRandy Dunlap @echo '' 17451da177e4SLinus Torvalds @echo 'Kernel packaging:' 1746000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 17471da177e4SLinus Torvalds @echo '' 17481da177e4SLinus Torvalds @echo 'Documentation targets:' 1749cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 17501da177e4SLinus Torvalds @echo '' 175101dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 17525c816641SMasahiro Yamada @$(or $(archhelp),\ 175301dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 17541da177e4SLinus Torvalds @echo '' 17551da177e4SLinus Torvalds @$(if $(boards), \ 17561da177e4SLinus Torvalds $(foreach b, $(boards), \ 17574234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 17581da177e4SLinus Torvalds echo '') 17595dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 17605dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 17615dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 17625dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 17635dffbe81SSegher Boessenkool echo '') 17641da177e4SLinus Torvalds 17651da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 176645d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 17671da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1768a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1769a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1770701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1771af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1772e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 177328bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 177428bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 177528bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1776c77d06e7SYann Droneaud @echo ' e: warnings are being treated as errors' 1777a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 17781da177e4SLinus Torvalds @echo '' 17791da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 17801da177e4SLinus Torvalds @echo 'For further info see the ./README file' 17811da177e4SLinus Torvalds 17821da177e4SLinus Torvalds 17835dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 17845dffbe81SSegher Boessenkool 17855dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 17865dffbe81SSegher Boessenkool 1787fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 17885dffbe81SSegher Boessenkool 17895dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 17905dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 17915dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 17925dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 17935dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 17945dffbe81SSegher Boessenkool echo '') 17955dffbe81SSegher Boessenkool 17965dffbe81SSegher Boessenkool 17971da177e4SLinus Torvalds# Documentation targets 17981da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1799e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1800e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 180122cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1802bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1803cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 18041da177e4SLinus Torvalds 18052f7ab126SMiguel Ojeda 18062f7ab126SMiguel Ojeda# Rust targets 18072f7ab126SMiguel Ojeda# --------------------------------------------------------------------------- 18082f7ab126SMiguel Ojeda 18092f7ab126SMiguel Ojeda# "Is Rust available?" target 18102f7ab126SMiguel OjedaPHONY += rustavailable 18112f7ab126SMiguel Ojedarustavailable: 18122f7ab126SMiguel Ojeda $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!" 18132f7ab126SMiguel Ojeda 18142f7ab126SMiguel Ojeda# Documentation target 18152f7ab126SMiguel Ojeda# 18162f7ab126SMiguel Ojeda# Using the singular to avoid running afoul of `no-dot-config-targets`. 18172f7ab126SMiguel OjedaPHONY += rustdoc 18182f7ab126SMiguel Ojedarustdoc: prepare 18192f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 18202f7ab126SMiguel Ojeda 18212f7ab126SMiguel Ojeda# Testing target 18222f7ab126SMiguel OjedaPHONY += rusttest 18232f7ab126SMiguel Ojedarusttest: prepare 18242f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 18252f7ab126SMiguel Ojeda 18262f7ab126SMiguel Ojeda# Formatting targets 18272f7ab126SMiguel OjedaPHONY += rustfmt rustfmtcheck 18282f7ab126SMiguel Ojeda 18292f7ab126SMiguel Ojeda# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. 18302f7ab126SMiguel Ojeda# 18312f7ab126SMiguel Ojeda# We match using absolute paths since `find` does not resolve them 18322f7ab126SMiguel Ojeda# when matching, which is a problem when e.g. `srctree` is `..`. 18332f7ab126SMiguel Ojeda# We `grep` afterwards in order to remove the directory entry itself. 18342f7ab126SMiguel Ojedarustfmt: 18352f7ab126SMiguel Ojeda $(Q)find $(abs_srctree) -type f -name '*.rs' \ 18362f7ab126SMiguel Ojeda -o -path $(abs_srctree)/rust/alloc -prune \ 18372f7ab126SMiguel Ojeda -o -path $(abs_objtree)/rust/test -prune \ 18382f7ab126SMiguel Ojeda | grep -Fv $(abs_srctree)/rust/alloc \ 18392f7ab126SMiguel Ojeda | grep -Fv $(abs_objtree)/rust/test \ 18402f7ab126SMiguel Ojeda | grep -Fv generated \ 18412f7ab126SMiguel Ojeda | xargs $(RUSTFMT) $(rustfmt_flags) 18422f7ab126SMiguel Ojeda 18432f7ab126SMiguel Ojedarustfmtcheck: rustfmt_flags = --check 18442f7ab126SMiguel Ojedarustfmtcheck: rustfmt 18452f7ab126SMiguel Ojeda 18462f7ab126SMiguel Ojeda# IDE support targets 18472f7ab126SMiguel OjedaPHONY += rust-analyzer 18482f7ab126SMiguel Ojedarust-analyzer: 18492f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 18502f7ab126SMiguel Ojeda 185167274c08SMasahiro Yamada# Misc 185267274c08SMasahiro Yamada# --------------------------------------------------------------------------- 185367274c08SMasahiro Yamada 185467274c08SMasahiro YamadaPHONY += scripts_gdb 18557a739ce5SMasahiro Yamadascripts_gdb: prepare0 18561e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 18578d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 185867274c08SMasahiro Yamada 185967274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 186067274c08SMasahiro Yamadaall: scripts_gdb 186167274c08SMasahiro Yamadaendif 186267274c08SMasahiro Yamada 18631da177e4SLinus Torvaldselse # KBUILD_EXTMOD 18641da177e4SLinus Torvalds 18651da177e4SLinus Torvalds### 18661da177e4SLinus Torvalds# External module support. 18671da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 18681da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 18691da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 187011122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used. 18711da177e4SLinus Torvalds 18726212804fSMasahiro Yamada# We are always building only modules. 18736212804fSMasahiro YamadaKBUILD_BUILTIN := 18741da177e4SLinus TorvaldsKBUILD_MODULES := 1 18751da177e4SLinus Torvalds 18765750121aSMasahiro Yamadabuild-dir := $(KBUILD_EXTMOD) 18773d32285fSMasahiro Yamada 18787f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json 18793d32285fSMasahiro YamadaPHONY += compile_commands.json 18803d32285fSMasahiro Yamada 188176cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 18823d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ 1883dc5723b0SSami Tolvanen $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache 18841da177e4SLinus Torvalds 18856072b2c4SMasahiro YamadaPHONY += prepare 18866072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations 18876072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 18886072b2c4SMasahiro Yamadaprepare: 1889129ab0d2SMasahiro Yamada @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 18906072b2c4SMasahiro Yamada echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1891129ab0d2SMasahiro Yamada echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 18926072b2c4SMasahiro Yamada echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 18936072b2c4SMasahiro Yamada fi 18946072b2c4SMasahiro Yamada 1895fe69b420SMasahiro YamadaPHONY += help 18961da177e4SLinus Torvaldshelp: 18971da177e4SLinus Torvalds @echo ' Building external modules.' 18981da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 18991da177e4SLinus Torvalds @echo '' 19001da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 19011da177e4SLinus Torvalds @echo ' modules_install - install the module' 19021da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 19031da177e4SLinus Torvalds @echo '' 190406300b21SSam Ravnborg 19051da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 19061da177e4SLinus Torvalds 19073e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 19083e3005dfSMasahiro Yamada# Modules 19093e3005dfSMasahiro Yamada 19107f371813SMasahiro YamadaPHONY += modules modules_install modules_prepare 19113e3005dfSMasahiro Yamada 19123e3005dfSMasahiro Yamadaifdef CONFIG_MODULES 19133e3005dfSMasahiro Yamada 19145750121aSMasahiro Yamada$(MODORDER): $(build-dir) 19155750121aSMasahiro Yamada @: 19165750121aSMasahiro Yamada 1917f73edc89SMasahiro Yamada# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. 1918f73edc89SMasahiro Yamada# This is solely useful to speed up test compiles. 1919f73edc89SMasahiro Yamadamodules: modpost 1920f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1) 1921f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 1922f73edc89SMasahiro Yamadaendif 19233e3005dfSMasahiro Yamada 19241a998be6SMasahiro YamadaPHONY += modules_check 19251a998be6SMasahiro Yamadamodules_check: $(MODORDER) 19261a998be6SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 19271a998be6SMasahiro Yamada 19283ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD $(MODLIB) 19293e3005dfSMasahiro Yamada cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 19303e3005dfSMasahiro Yamada $(KERNELRELEASE) 19313e3005dfSMasahiro Yamada 19323e3005dfSMasahiro Yamadamodules_install: 19333e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 19343e3005dfSMasahiro Yamada $(call cmd,depmod) 19353e3005dfSMasahiro Yamada 19363e3005dfSMasahiro Yamadaelse # CONFIG_MODULES 19373e3005dfSMasahiro Yamada 19383e3005dfSMasahiro Yamada# Modules not configured 19393e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 19403e3005dfSMasahiro Yamada 19413e3005dfSMasahiro Yamadamodules modules_install: 19423e3005dfSMasahiro Yamada @echo >&2 '***' 19433e3005dfSMasahiro Yamada @echo >&2 '*** The present kernel configuration has modules disabled.' 19443e3005dfSMasahiro Yamada @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' 19453e3005dfSMasahiro Yamada @echo >&2 '*** to enable CONFIG_MODULES.' 19463e3005dfSMasahiro Yamada @echo >&2 '***' 19473e3005dfSMasahiro Yamada @exit 1 19483e3005dfSMasahiro Yamada 1949f110e5a2SMasahiro YamadaKBUILD_MODULES := 1950f110e5a2SMasahiro Yamada 19513e3005dfSMasahiro Yamadaendif # CONFIG_MODULES 19523e3005dfSMasahiro Yamada 1953f73edc89SMasahiro YamadaPHONY += modpost 1954f73edc89SMasahiro Yamadamodpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ 1955f73edc89SMasahiro Yamada $(if $(KBUILD_MODULES), modules_check) 1956f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1957f73edc89SMasahiro Yamada 1958b1fbfcb4SMasahiro Yamada# Single targets 1959b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1960b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1961b1fbfcb4SMasahiro Yamada# 1962b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1963b1fbfcb4SMasahiro Yamada# 1964b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1965b1fbfcb4SMasahiro Yamada# 1966b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1967b1fbfcb4SMasahiro Yamada# 1968b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1969b1fbfcb4SMasahiro Yamada 1970b1fbfcb4SMasahiro Yamadaifdef single-build 1971b1fbfcb4SMasahiro Yamada 1972b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1973b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1974fc93a4cdSMasahiro Yamadasingle-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 1975fc93a4cdSMasahiro Yamada $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 1976b1fbfcb4SMasahiro Yamada 1977f73edc89SMasahiro Yamada$(single-ko): single_modules 1978b1fbfcb4SMasahiro Yamada @: 19795750121aSMasahiro Yamada$(single-no-ko): $(build-dir) 1980b1fbfcb4SMasahiro Yamada @: 1981b1fbfcb4SMasahiro Yamada 1982f110e5a2SMasahiro Yamada# Remove MODORDER when done because it is not the real one. 1983f73edc89SMasahiro YamadaPHONY += single_modules 1984f73edc89SMasahiro Yamadasingle_modules: $(single-no-ko) modules_prepare 19857f69180bSMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER) 1986b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1987f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1) 1988f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 1989f73edc89SMasahiro Yamadaendif 1990f110e5a2SMasahiro Yamada $(Q)rm -f $(MODORDER) 1991b1fbfcb4SMasahiro Yamada 19925750121aSMasahiro Yamadasingle-goals := $(addprefix $(build-dir)/, $(single-no-ko)) 1993b1fbfcb4SMasahiro Yamada 19943753af77SMasahiro YamadaKBUILD_MODULES := 1 19953753af77SMasahiro Yamada 1996b1fbfcb4SMasahiro Yamadaendif 1997b1fbfcb4SMasahiro Yamada 1998c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1999c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 2000c99f3918SMasahiro Yamada# make menuconfig etc. 2001c99f3918SMasahiro Yamada# Error messages still appears in the original language 20025750121aSMasahiro YamadaPHONY += $(build-dir) 20035750121aSMasahiro Yamada$(build-dir): prepare 20045750121aSMasahiro Yamada $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) 2005c99f3918SMasahiro Yamada 200676cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 200776cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 200876cd306dSMasahiro Yamada$(clean-dirs): 200976cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 201076cd306dSMasahiro Yamada 201188d7be03SMichal Marekclean: $(clean-dirs) 201288d7be03SMichal Marek $(call cmd,rmfiles) 20135c816641SMasahiro Yamada @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 20142f7ab126SMiguel Ojeda \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ 20154f0e3a57SRob Herring -o -name '*.ko.*' \ 2016ce88c9c7SViresh Kumar -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 2017ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 20189413e764SMasahiro Yamada -o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \ 201988d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 20209a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 20214fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 202288d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 2023b0d6207bSMasahiro Yamada -o -name '.tmp_*' \ 20246b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 2025433db3e2SVinÃcius Tinti -o -name '*.ll' \ 202638e89184SSami Tolvanen -o -name '*.gcno' \ 202738e89184SSami Tolvanen -o -name '*.*.symversions' \) -type f -print | xargs rm -f 202888d7be03SMichal Marek 20291da177e4SLinus Torvalds# Generate tags for editors 20301da177e4SLinus Torvalds# --------------------------------------------------------------------------- 2031a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 2032858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 20331da177e4SLinus Torvalds 2034f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 20351da177e4SLinus Torvalds $(call cmd,tags) 20361da177e4SLinus Torvalds 2037eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 2038eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 2039eb8305aeSMatthias Maennich 2040eb8305aeSMatthias MaennichPHONY += nsdeps 2041bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 2042eb8305aeSMatthias Maennichnsdeps: modules 2043bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 2044eb8305aeSMatthias Maennich 20453d32285fSMasahiro Yamada# Clang Tooling 20463d32285fSMasahiro Yamada# --------------------------------------------------------------------------- 20473d32285fSMasahiro Yamada 20483d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN $@ 20493d32285fSMasahiro Yamada cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 20503d32285fSMasahiro Yamada 20517f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ 205232164845SMasahiro Yamada $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ 20533d32285fSMasahiro Yamada $(if $(CONFIG_MODULES), $(MODORDER)) FORCE 20543d32285fSMasahiro Yamada $(call if_changed,gen_compile_commands) 20553d32285fSMasahiro Yamada 20567f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json 20573d32285fSMasahiro Yamada 20586ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer 20596ad7cbc0SNathan Huckleberry 20606ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG 20616ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK $< 20626ad7cbc0SNathan Huckleberry cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 20636ad7cbc0SNathan Huckleberry 20647f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json 20656ad7cbc0SNathan Huckleberry $(call cmd,clang_tools) 20666ad7cbc0SNathan Huckleberryelse 20676ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer: 20686ad7cbc0SNathan Huckleberry @echo "$@ requires CC=clang" >&2 20696ad7cbc0SNathan Huckleberry @false 20706ad7cbc0SNathan Huckleberryendif 20716ad7cbc0SNathan Huckleberry 20721da177e4SLinus Torvalds# Scripts to check various things for consistency 20731da177e4SLinus Torvalds# --------------------------------------------------------------------------- 20741da177e4SLinus Torvalds 20757dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report 2076279f3dd3SPeter Foley 20771da177e4SLinus Torvaldsincludecheck: 2078436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 20791da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 208080007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 20811da177e4SLinus Torvalds 20821da177e4SLinus Torvaldsversioncheck: 20832ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 20841da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 208580007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 20861da177e4SLinus Torvalds 208774425eeeSNicolas Palixcoccicheck: 2088858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 208974425eeeSNicolas Palix 2090295ac051SAdrian Bunkexport_report: 2091295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 2092295ac051SAdrian Bunk 2093c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 2094e3ccf6e3SJeff Dike 2095011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 2096011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2097011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 2098011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 2099011e3a9aSJeff Dikeifeq ($(ARCH), um) 2100011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 2101011e3a9aSJeff Dikeelse 2102011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 2103011e3a9aSJeff Dikeendif 21041da177e4SLinus Torvaldscheckstack: 21051da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 210675dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 21071da177e4SLinus Torvalds 21087b8ea53dSAmerigo Wangkernelrelease: 21097b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 211001ab1788SAmerigo Wang 2111cb58455cSSam Ravnborgkernelversion: 21122244cbd8SSam Ravnborg @echo $(KERNELVERSION) 21131da177e4SLinus Torvalds 2114c398ff00SMike Marciniszynimage_name: 2115c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 2116c398ff00SMike Marciniszyn 21171da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 21180663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 21191da177e4SLinus Torvalds 2120392885eeSMasahiro Yamada# read saved command lines for existing targets 2121392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 21221da177e4SLinus Torvalds 2123b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 21241da177e4SLinus Torvalds 212546b7c492SSZ Lin (林上智)endif # config-build 21262042b548SMasahiro Yamadaendif # mixed-build 2127688931a5SMasahiro Yamadaendif # need-sub-make 21281da177e4SLinus Torvalds 21294f193362SPaul SmithPHONY += FORCE 21301da177e4SLinus TorvaldsFORCE: 21314f193362SPaul Smith 2132bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 2133fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 21344f193362SPaul Smith.PHONY: $(PHONY) 2135