1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2568035b0SLinus TorvaldsVERSION = 6 3568035b0SLinus TorvaldsPATCHLEVEL = 0 455922c9dSLinus TorvaldsSUBLEVEL = 0 5f76349cfSLinus TorvaldsEXTRAVERSION = -rc7 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 14121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \ 15121c2a13SMasahiro Yamada $(error targets prefixed with '__' are only for internal use)) 16121c2a13SMasahiro Yamada 17ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 18121c2a13SMasahiro YamadaPHONY := __all 19121c2a13SMasahiro Yamada__all: 20ba634eceSMasahiro Yamada 211da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 221da177e4SLinus Torvalds# to get the ordering right. 231da177e4SLinus Torvalds# 241da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 251da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 261da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 27f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 281da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 291da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 301da177e4SLinus Torvalds# is now up to date. 311da177e4SLinus Torvalds# 321da177e4SLinus Torvalds# The only cases where we need to modify files which have global 331da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 341da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 351da177e4SLinus Torvalds# prepare rule. 361da177e4SLinus Torvalds 37221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 383812b8c5SMasahiro Yamada 393812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 403812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 413812b8c5SMasahiro YamadaMAKEFLAGS += -rR 423812b8c5SMasahiro Yamada 433812b8c5SMasahiro Yamada# Avoid funny character set dependencies 443812b8c5SMasahiro Yamadaunexport LC_ALL 453812b8c5SMasahiro YamadaLC_COLLATE=C 463812b8c5SMasahiro YamadaLC_NUMERIC=C 473812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 483812b8c5SMasahiro Yamada 493812b8c5SMasahiro Yamada# Avoid interference with shell env settings 503812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 513812b8c5SMasahiro Yamada 52066b7ed9SMichal Marek# Beautify output 53066b7ed9SMichal Marek# --------------------------------------------------------------------------- 54066b7ed9SMichal Marek# 55066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 56066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 57066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 58066b7ed9SMichal Marek# 59066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 60066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 61066b7ed9SMichal Marek# 62066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 63066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 64066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 65066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 66066b7ed9SMichal Marek# 67066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 68066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 69066b7ed9SMichal Marek# 70066b7ed9SMichal Marek# $(Q)ln $@ :< 71066b7ed9SMichal Marek# 72066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 73066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 74505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 75066b7ed9SMichal Marek# 761da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 771da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 781da177e4SLinus Torvalds 791da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 801da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 811da177e4SLinus Torvaldsendif 821da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 831da177e4SLinus Torvalds KBUILD_VERBOSE = 0 841da177e4SLinus Torvaldsendif 851da177e4SLinus Torvalds 86066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 87066b7ed9SMichal Marek quiet = 88066b7ed9SMichal Marek Q = 89066b7ed9SMichal Marekelse 90066b7ed9SMichal Marek quiet=quiet_ 91066b7ed9SMichal Marek Q = @ 92066b7ed9SMichal Marekendif 93066b7ed9SMichal Marek 94066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 95066b7ed9SMichal Marek# commands 96066b7ed9SMichal Marek 976f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 98066b7ed9SMichal Marek quiet=silent_ 9922149454SMasahiro Yamada KBUILD_VERBOSE = 0 100066b7ed9SMichal Marekendif 101066b7ed9SMichal Marek 102066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 103066b7ed9SMichal Marek 104bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 105bcf637f5SMasahiro Yamada# C compilation. 106bcf637f5SMasahiro Yamada# 107bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 108bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 109bcf637f5SMasahiro Yamada# of whether they are re-compiled or not. 110bcf637f5SMasahiro Yamada# 111bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details, 112bcf637f5SMasahiro Yamada# including where to get the "sparse" utility. 113bcf637f5SMasahiro Yamada 114bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line") 115bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = $(C) 116bcf637f5SMasahiro Yamadaendif 117bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC 118bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = 0 119bcf637f5SMasahiro Yamadaendif 120bcf637f5SMasahiro Yamada 121bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC 122bcf637f5SMasahiro Yamada 123bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 124bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 125bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line") 126bcf637f5SMasahiro Yamada KBUILD_EXTMOD := $(M) 127bcf637f5SMasahiro Yamadaendif 128bcf637f5SMasahiro Yamada 129bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \ 130bcf637f5SMasahiro Yamada $(error building multiple external modules is not supported)) 131bcf637f5SMasahiro Yamada 1329a68fd7fSMasahiro Yamada$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ 1339a68fd7fSMasahiro Yamada $(error module directory path cannot contain '$x'))) 1349a68fd7fSMasahiro Yamada 13574ee585bSMasahiro Yamada# Remove trailing slashes 13674ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),) 13774ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) 13874ee585bSMasahiro Yamadaendif 13974ee585bSMasahiro Yamada 140bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD 141bcf637f5SMasahiro Yamada 14225b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 14325b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 14425b146c5SMasahiro Yamada# 14525b146c5SMasahiro Yamada# For example, you can do this: 14625b146c5SMasahiro Yamada# 14725b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 14825b146c5SMasahiro Yamada# 14925b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 15025b146c5SMasahiro Yamada# two syntaxes to specify it. 15125b146c5SMasahiro Yamada# 1521da177e4SLinus Torvalds# 1) O= 1531da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1541da177e4SLinus Torvalds# 1551da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 15625b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 15725b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1581da177e4SLinus Torvalds# 1591da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1601da177e4SLinus Torvalds# variable. 1611da177e4SLinus Torvalds 16225b146c5SMasahiro Yamada# Do we want to change the working directory? 1631da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1641da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1651da177e4SLinus Torvaldsendif 1661da177e4SLinus Torvalds 16725b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 16825b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 16925b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 17025b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 17125b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 17225b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 17325b146c5SMasahiro Yamada 17425b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 17525b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 17625b146c5SMasahiro Yamadaelse 17725b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 17825b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 17925b146c5SMasahiro Yamada 18025b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 18125b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 18225b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 18325b146c5SMasahiro Yamadaelse 18425b146c5SMasahiro Yamadaneed-sub-make := 1 18551193b76SRobert Jarzmikendif 18651193b76SRobert Jarzmik 18730cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 18830cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile))) 1891da177e4SLinus Torvalds 19025b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 19125b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 19225b146c5SMasahiro Yamadaendif 19325b146c5SMasahiro Yamada 19425b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 19580463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 19680463f1bSMasahiro Yamada# 197d8285639SMasahiro Yamada# --included-dir is added for backward compatibility, but you should not rely on 198d8285639SMasahiro Yamada# it. Please add $(srctree)/ prefix to include Makefiles in the source tree. 19925b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 20025b146c5SMasahiro Yamadaendif 2013812b8c5SMasahiro Yamada 202688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 203688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 204688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 205688931a5SMasahiro Yamadaneed-sub-make := 1 206688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 20793fdddfeSMasahiro Yamada$(this-makefile): ; 208688931a5SMasahiro Yamadaendif 209688931a5SMasahiro Yamada 21025b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 211221cc2d2SMasahiro Yamadaexport sub_make_done := 1 212221cc2d2SMasahiro Yamada 213688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 214688931a5SMasahiro Yamada 215121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 2160b35786dSMilton Miller 217121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 21816f89098SCharles Keepax @: 2190b35786dSMilton Miller 220c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 221121c2a13SMasahiro Yamada__sub-make: 22225b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 2231da177e4SLinus Torvalds 224688931a5SMasahiro Yamadaendif # need-sub-make 225221cc2d2SMasahiro Yamadaendif # sub_make_done 226688931a5SMasahiro Yamada 2271da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 228688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 2291da177e4SLinus Torvalds 2307ff52571SMasahiro Yamada# Do not print "Entering directory ...", 2317ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 2327ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 2337ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 2347ff52571SMasahiro Yamada 23525b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2369da0763bSMichal Marek # building in the source tree 2379da0763bSMichal Marek srctree := . 238051f278eSMasahiro Yamada building_out_of_srctree := 2399da0763bSMichal Marekelse 24025b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2419da0763bSMichal Marek # building in a subdirectory of the source tree 2429da0763bSMichal Marek srctree := .. 2439da0763bSMichal Marek else 24425b146c5SMasahiro Yamada srctree := $(abs_srctree) 2459da0763bSMichal Marek endif 246051f278eSMasahiro Yamada building_out_of_srctree := 1 2479da0763bSMichal Marekendif 2482c1f4f12SMasahiro Yamada 24995fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 25095fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 25195fd3f87SMasahiro Yamadaendif 2522c1f4f12SMasahiro Yamada 2537e1c0477SMichal Marekobjtree := . 2546b12de69SMasahiro YamadaVPATH := $(srctree) 2551da177e4SLinus Torvalds 256051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2571da177e4SLinus Torvalds 2582c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2592c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2602c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2612c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2622c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2632c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2642c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2652c1f4f12SMasahiro Yamada 2662c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2672c1f4f12SMasahiro Yamada 26822340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 26922340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2702c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 27159b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2724623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 2734623980dSDavid Engraf outputmakefile 274805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install 275805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed. 276805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \ 277805b2e1dSMasahiro Yamada headers_install modules_install kernelrelease image_name 278993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ 279993bdde9SMasahiro Yamada image_name 280394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 2812c1f4f12SMasahiro Yamada 2822042b548SMasahiro Yamadaconfig-build := 2832042b548SMasahiro Yamadamixed-build := 2842042b548SMasahiro Yamadaneed-config := 1 285805b2e1dSMasahiro Yamadaneed-compiler := 1 286d7942413SMasahiro Yamadamay-sync-config := 1 287394053f4SMasahiro Yamadasingle-build := 2882c1f4f12SMasahiro Yamada 2892c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2902c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2912042b548SMasahiro Yamada need-config := 2922c1f4f12SMasahiro Yamada endif 2932c1f4f12SMasahiro Yamadaendif 2942c1f4f12SMasahiro Yamada 295805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) 296805b2e1dSMasahiro Yamada ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) 297805b2e1dSMasahiro Yamada need-compiler := 298805b2e1dSMasahiro Yamada endif 299805b2e1dSMasahiro Yamadaendif 300805b2e1dSMasahiro Yamada 301d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 302d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 3032042b548SMasahiro Yamada may-sync-config := 304d7942413SMasahiro Yamada endif 305d7942413SMasahiro Yamadaendif 306d7942413SMasahiro Yamada 307d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 3082042b548SMasahiro Yamada may-sync-config := 309d7942413SMasahiro Yamadaendif 310d7942413SMasahiro Yamada 3112c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 312efbf9726SMasahiro Yamada ifneq ($(filter %config,$(MAKECMDGOALS)),) 3132042b548SMasahiro Yamada config-build := 1 3142c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 3152042b548SMasahiro Yamada mixed-build := 1 3162c1f4f12SMasahiro Yamada endif 3172c1f4f12SMasahiro Yamada endif 3182c1f4f12SMasahiro Yamadaendif 31922340a06SMasahiro Yamada 320394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 321394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 322394053f4SMasahiro Yamada single-build := 1 323394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 324394053f4SMasahiro Yamada mixed-build := 1 325394053f4SMasahiro Yamada endif 326394053f4SMasahiro Yamadaendif 327394053f4SMasahiro Yamada 32822340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 32922340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 33022340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3312042b548SMasahiro Yamada mixed-build := 1 33222340a06SMasahiro Yamada endif 33322340a06SMasahiro Yamadaendif 33422340a06SMasahiro Yamada 3352c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3362c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3372c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3382042b548SMasahiro Yamada mixed-build := 1 3392c1f4f12SMasahiro Yamada endif 3402c1f4f12SMasahiro Yamadaendif 3412c1f4f12SMasahiro Yamada 3422042b548SMasahiro Yamadaifdef mixed-build 3432c1f4f12SMasahiro Yamada# =========================================================================== 3442c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3452c1f4f12SMasahiro Yamada# Handle them one by one. 3462c1f4f12SMasahiro Yamada 3472c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3482c1f4f12SMasahiro Yamada 349121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 3502c1f4f12SMasahiro Yamada @: 3512c1f4f12SMasahiro Yamada 3522c1f4f12SMasahiro Yamada__build_one_by_one: 3532c1f4f12SMasahiro Yamada $(Q)set -e; \ 3542c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3552c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3562c1f4f12SMasahiro Yamada done 3572c1f4f12SMasahiro Yamada 3582042b548SMasahiro Yamadaelse # !mixed-build 3592c1f4f12SMasahiro Yamada 3603204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include 3612c1f4f12SMasahiro Yamada 3622c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3632c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 3642c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3652c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3662c1f4f12SMasahiro Yamada 3673204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3701da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3711da177e4SLinus Torvalds# 3721da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3731da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3741da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3751da177e4SLinus Torvalds# make ARCH=ia64 3761da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3771da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3801da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3811da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3821da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3831da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3841da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3851da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3861da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3872331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds# Architecture as present in compile.h 3901da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3916752ed90SThomas GleixnerSRCARCH := $(ARCH) 3921da177e4SLinus Torvalds 393d746d647SSam Ravnborg# Additional ARCH settings for x86 394d746d647SSam Ravnborgifeq ($(ARCH),i386) 395d746d647SSam Ravnborg SRCARCH := x86 396d746d647SSam Ravnborgendif 397d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 398d746d647SSam Ravnborg SRCARCH := x86 399d746d647SSam Ravnborgendif 40074b469f2SSam Ravnborg 4015e538790SSam Ravnborg# Additional ARCH settings for sparc 402e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 403e69f58c0SNamhyung Kim SRCARCH := sparc 404e69f58c0SNamhyung Kimendif 405a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 4065e538790SSam Ravnborg SRCARCH := sparc 407a439fe51SSam Ravnborgendif 4082fb9b1bdSSam Ravnborg 4095f6e0fe0SMasahiro Yamada# Additional ARCH settings for parisc 4105f6e0fe0SMasahiro Yamadaifeq ($(ARCH),parisc64) 4115f6e0fe0SMasahiro Yamada SRCARCH := parisc 4125f6e0fe0SMasahiro Yamadaendif 4135f6e0fe0SMasahiro Yamada 414f02aa48dSMasahiro Yamadaexport cross_compiling := 415f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH)) 416f02aa48dSMasahiro Yamadacross_compiling := 1 417f02aa48dSMasahiro Yamadaendif 418f02aa48dSMasahiro Yamada 41914cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 42041263fc6SBen Gardinerexport KCONFIG_CONFIG 42114cdd3c4SRoman Zippel 4221da177e4SLinus Torvalds# SHELL used by kbuild 423858805b3SMasahiro YamadaCONFIG_SHELL := sh 4241da177e4SLinus Torvalds 4256d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4266d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4276d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 428d7f14c66SUwe Kleine-König 429a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 430e9c28192SNathan Chancellorifneq ($(filter %/,$(LLVM)),) 431e9c28192SNathan ChancellorLLVM_PREFIX := $(LLVM) 432e9c28192SNathan Chancellorelse ifneq ($(filter -%,$(LLVM)),) 433e9c28192SNathan ChancellorLLVM_SUFFIX := $(LLVM) 434e9c28192SNathan Chancellorendif 435e9c28192SNathan Chancellor 436e9c28192SNathan ChancellorHOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 437e9c28192SNathan ChancellorHOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 438a0d1c951SMasahiro Yamadaelse 4391da177e4SLinus TorvaldsHOSTCC = gcc 4401da177e4SLinus TorvaldsHOSTCXX = g++ 441a0d1c951SMasahiro Yamadaendif 442d5ea4fecSChun-Tse ShaoHOSTPKG_CONFIG = pkg-config 4437f3a59dbSMasahiro Yamada 444f67695c9SElliot BermanKBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 4451e240781SArnd Bergmann -O2 -fomit-frame-pointer -std=gnu11 \ 4464d94f910SMark Rutland -Wdeclaration-after-statement 447f67695c9SElliot BermanKBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) 448f67695c9SElliot BermanKBUILD_USERLDFLAGS := $(USERLDFLAGS) 4497f3a59dbSMasahiro Yamada 450f67695c9SElliot BermanKBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 451735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 452f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 453f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds# Make variables (CC, etc...) 4561da177e4SLinus TorvaldsCPP = $(CC) -E 457a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 458e9c28192SNathan ChancellorCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 459e9c28192SNathan ChancellorLD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 460e9c28192SNathan ChancellorAR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 461e9c28192SNathan ChancellorNM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 462e9c28192SNathan ChancellorOBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 463e9c28192SNathan ChancellorOBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 464e9c28192SNathan ChancellorREADELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 465e9c28192SNathan ChancellorSTRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 466a0d1c951SMasahiro Yamadaelse 467a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 468a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 4691da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4701da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4711da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4721da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 473eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 474a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 475a0d1c951SMasahiro Yamadaendif 476e83b9f55SAndrii NakryikoPAHOLE = pahole 477c9a0f3b8SJiri OlsaRESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 47873a4f6dbSMasahiro YamadaLEX = flex 47973a4f6dbSMasahiro YamadaYACC = bison 4801da177e4SLinus TorvaldsAWK = awk 481caa27b66SSam RavnborgINSTALLKERNEL := installkernel 482436e980eSDominique MartinetDEPMOD = depmod 4831da177e4SLinus TorvaldsPERL = perl 484e9781b52SMasahiro YamadaPYTHON3 = python3 4851da177e4SLinus TorvaldsCHECK = sparse 486858805b3SMasahiro YamadaBASH = bash 487e4a42c82SDenis EfremovKGZIP = gzip 488e4a42c82SDenis EfremovKBZIP2 = bzip2 489e4a42c82SDenis EfremovKLZOP = lzop 4908dfb61dcSDenis EfremovLZMA = lzma 4918dfb61dcSDenis EfremovLZ4 = lz4c 4928dfb61dcSDenis EfremovXZ = xz 49348f7ddf7SNick TerrellZSTD = zstd 4948dfb61dcSDenis Efremov 4959741e07eSJiri OlsaPAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) 4969741e07eSJiri Olsa 49780a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 4986c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 4990c22be07SDouglas AndersonNOSTDINC_FLAGS := 5006588169dSSam RavnborgCFLAGS_MODULE = 5016588169dSSam RavnborgAFLAGS_MODULE = 5026588169dSSam RavnborgLDFLAGS_MODULE = 5031da177e4SLinus TorvaldsCFLAGS_KERNEL = 5041da177e4SLinus TorvaldsAFLAGS_KERNEL = 5055d4aeffbSMasahiro Yamadaexport LDFLAGS_vmlinux = 5061da177e4SLinus Torvalds 507abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 508abbf1590SDavid HowellsUSERINCLUDE := \ 5099d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 5109d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 511abbf1590SDavid Howells -I$(srctree)/include/uapi \ 5123308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 513ce6ed1c4SMasahiro Yamada -include $(srctree)/include/linux/compiler-version.h \ 514abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 515abbf1590SDavid Howells 5161da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 5171da177e4SLinus Torvalds# Needed to be compatible with the O= option 518abbf1590SDavid HowellsLINUXINCLUDE := \ 5199d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 5209d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 521051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 522f8224f7fSMasahiro Yamada -I$(objtree)/include \ 523f8224f7fSMasahiro Yamada $(USERINCLUDE) 5241da177e4SLinus Torvalds 52542a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 526eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 52742a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 528b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 529172aad81SOlaf Hering -Werror=return-type -Wno-format-security \ 530e8c07082SArnd Bergmann -std=gnu11 531433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 53280c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 53380c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 5346588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 5356588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 53610df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 537d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 5385241ab4cSMasahiro YamadaCLANG_FLAGS := 5391da177e4SLinus Torvalds 540d5ea4fecSChun-Tse Shaoexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 541d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 542d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 54348f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 5447bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 545f67695c9SElliot Bermanexport KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 5461da177e4SLinus Torvalds 547d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 5480e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 549222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 5506588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 55180c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 5529741e07eSJiri Olsaexport PAHOLE_FLAGS 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds# Files to ignore in find ... statements 5551da177e4SLinus Torvalds 556ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 557ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 558ae63b2d7SPrarit Bhargava -prune -o 559450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 560450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds# =========================================================================== 5631da177e4SLinus Torvalds# Rules shared between *config targets and build targets 5641da177e4SLinus Torvalds 565312a3d09SCao jin# Basic helpers built in scripts/basic/ 5664f193362SPaul SmithPHONY += scripts_basic 5671da177e4SLinus Torvaldsscripts_basic: 5681da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 5691da177e4SLinus Torvalds 5704f193362SPaul SmithPHONY += outputmakefile 5712728fcfaSMasahiro Yamadaifdef building_out_of_srctree 572e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 573fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 574fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 575fd5f0cd6SJan Beulich# output directory. 5763a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 5773a51ff34SVladimir Kondratiev# ignore whole output directory 5782728fcfaSMasahiro Yamada 5792728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN Makefile 5802728fcfaSMasahiro Yamada cmd_makefile = { \ 5812728fcfaSMasahiro Yamada echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ 5822728fcfaSMasahiro Yamada echo "include $(srctree)/Makefile"; \ 5832728fcfaSMasahiro Yamada } > Makefile 5842728fcfaSMasahiro Yamada 5851da177e4SLinus Torvaldsoutputmakefile: 5864b098659SMasahiro Yamada @if [ -f $(srctree)/.config -o \ 587e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 588e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 589e8e83a23SMasahiro Yamada echo >&2 "***"; \ 590e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 591e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 592e8e83a23SMasahiro Yamada echo >&2 "***"; \ 593e8e83a23SMasahiro Yamada false; \ 594e8e83a23SMasahiro Yamada fi 59592979997SAndi Kleen $(Q)ln -fsn $(srctree) source 5962728fcfaSMasahiro Yamada $(call cmd,makefile) 597156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 598156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 599fd5f0cd6SJan Beulichendif 6001da177e4SLinus Torvalds 601db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 602db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 603db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 604db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade. 6056072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 606db07562aSNick Desaulniers 607db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 6086f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang 609ae6b289aSChris Friesendif 610ae6b289aSChris Fries 61157fd251cSMasahiro Yamada# Include this also for config targets because some architectures need 61257fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE. 613805b2e1dSMasahiro Yamadaifdef need-compiler 61457fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler 615805b2e1dSMasahiro Yamadaendif 61657fd251cSMasahiro Yamada 6172042b548SMasahiro Yamadaifdef config-build 6181da177e4SLinus Torvalds# =========================================================================== 6191da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 6201da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 6231da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 6241da177e4SLinus Torvalds# used for 'make defconfig' 6253204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 626315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 6271da177e4SLinus Torvalds 62836de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 62931110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 63031110ebbSSam Ravnborg 63136de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 6321da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 6331da177e4SLinus Torvalds 6342042b548SMasahiro Yamadaelse #!config-build 6351da177e4SLinus Torvalds# =========================================================================== 6361da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 6371da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 6381da177e4SLinus Torvalds 6392c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 640121c2a13SMasahiro Yamada# but instead __all depend on modules 6412c1f4f12SMasahiro YamadaPHONY += all 6422c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 643121c2a13SMasahiro Yamada__all: all 6442c1f4f12SMasahiro Yamadaelse 645121c2a13SMasahiro Yamada__all: modules 6462c1f4f12SMasahiro Yamadaendif 6472c1f4f12SMasahiro Yamada 64832164845SMasahiro Yamadatargets := 64932164845SMasahiro Yamada 6502c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 6512c1f4f12SMasahiro Yamada# Normally, just do built-in. 6522c1f4f12SMasahiro Yamada 6532c1f4f12SMasahiro YamadaKBUILD_MODULES := 6542c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 6552c1f4f12SMasahiro Yamada 6562c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 6572c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 6584b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 6592c1f4f12SMasahiro Yamadaendif 6602c1f4f12SMasahiro Yamada 6612c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 6622c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 6632c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 6642c1f4f12SMasahiro Yamada 6656ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) 6662c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6672c1f4f12SMasahiro Yamadaendif 6682c1f4f12SMasahiro Yamada 6692c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 6702c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6712c1f4f12SMasahiro Yamadaendif 6722c1f4f12SMasahiro Yamada 6732c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 6742c1f4f12SMasahiro Yamada 6752042b548SMasahiro Yamadaifdef need-config 676d93a18f2SMasahiro Yamadainclude include/config/auto.conf 677d93a18f2SMasahiro Yamadaendif 678d93a18f2SMasahiro Yamada 6791da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 6801da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 6815750121aSMasahiro Yamadacore-y := 6825750121aSMasahiro Yamadadrivers-y := 6831da177e4SLinus Torvaldslibs-y := lib/ 6841da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 6851da177e4SLinus Torvalds 686315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 687315bab4eSMasahiro Yamada# command line. 688315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 689315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 690315bab4eSMasahiro Yamadaall: vmlinux 691315bab4eSMasahiro Yamada 6927d73c3e9SNick DesaulniersCFLAGS_GCOV := -fprofile-arcs -ftest-coverage 6937d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 6947d73c3e9SNick DesaulniersCFLAGS_GCOV += -fno-tree-loop-im 6957d73c3e9SNick Desaulniersendif 6965aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 697315bab4eSMasahiro Yamada 698b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 699b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 700b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 701b1f4ff74SPaulo Zanoniendif 702b1f4ff74SPaulo Zanoni 7033204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 704315bab4eSMasahiro Yamada 7052042b548SMasahiro Yamadaifdef need-config 7062042b548SMasahiro Yamadaifdef may-sync-config 707315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 708315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 709315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 710d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 7111da177e4SLinus Torvalds 71205850719SMasahiro Yamada$(KCONFIG_CONFIG): 71305850719SMasahiro Yamada @echo >&2 '***' 71405850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 71505850719SMasahiro Yamada @echo >&2 '***' 71605850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 71705850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 71805850719SMasahiro Yamada @echo >&2 '***' 71905850719SMasahiro Yamada @/bin/false 7201da177e4SLinus Torvalds 72161277981SUlf Magnusson# The actual configuration files used during the build are stored in 72261277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 72361277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 7249390dff6SMasahiro Yamada# 7259390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 7269390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 727f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 728d952cfafSMasahiro Yamada# 729d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 730d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input. 7313044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) 732d952cfafSMasahiro Yamada $(Q)$(kecho) " SYNC $@" 733d952cfafSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 7342042b548SMasahiro Yamadaelse # !may-sync-config 735d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 736d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 737d7942413SMasahiro Yamada# Use auto.conf to trigger the test 7389ee4e336SSam RavnborgPHONY += include/config/auto.conf 7399ee4e336SSam Ravnborg 7409ee4e336SSam Ravnborginclude/config/auto.conf: 7414b098659SMasahiro Yamada @test -e include/generated/autoconf.h -a -e $@ || ( \ 7425369f550SMichal Marek echo >&2; \ 7435369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 7445369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 7455369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 7465369f550SMichal Marek echo >&2 ; \ 7479ee4e336SSam Ravnborg /bin/false) 7489ee4e336SSam Ravnborg 749d7942413SMasahiro Yamadaendif # may-sync-config 7502042b548SMasahiro Yamadaendif # need-config 7511da177e4SLinus Torvalds 7527d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-delete-null-pointer-checks 753ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 754bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 755bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 7566f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 757a1c48bb1SGeert Uytterhoeven 75815f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 759a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 76015f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 76115f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 7621da177e4SLinus Torvaldsendif 7631da177e4SLinus Torvalds 76469102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 7657d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 7667d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to 7677d73c3e9SNick Desaulniers# -fno-allow-store-data-races. 76869102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 769b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 7707d73c3e9SNick Desaulniersendif 77169102311SJiri Kosina 7721873e870SAndi Kleenifdef CONFIG_READABLE_ASM 7731873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 7741873e870SAndi Kleen# reorder blocks reorders the control in the function 7751873e870SAndi Kleen# ipa clone creates specialized cloned functions 7761873e870SAndi Kleen# partial inlining inlines only parts of functions 7777d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 7781873e870SAndi Kleenendif 7791873e870SAndi Kleen 78008f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 781a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 78235bb5b1eSAndi Kleenendif 78335bb5b1eSAndi Kleen 784893ab004SMasahiro Yamadastackp-flags-y := -fno-stack-protector 785050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 786050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 7872a61f474SMasahiro Yamada 7882a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 789e06b8b98SSam Ravnborg 7903fe617ccSLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror 791f0be87c4SLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds 7923fe617ccSLinus Torvalds 793076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 794a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 795e8c07082SArnd Bergmann# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. 796a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 797d936eb23SLinus Torvaldselse 798d936eb23SLinus Torvalds 79949832c81SRandy Dunlap# gcc inanely warns about local variables called 'main' 80049832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main 801cfe17c9bSMasahiro Yamadaendif 802cfe17c9bSMasahiro Yamada 803885480b0SNathan Chancellor# These warnings generated too much noise in a regular build. 804885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 805885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 8060a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 8076272cc38SNathan Chancellor 80849beadbdSLinus Torvalds# These result in bogus false positives 80949beadbdSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) 81049beadbdSLinus Torvalds 8111da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 812a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 8131da177e4SLinus Torvaldselse 8147e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 8157e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 8167e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 8177e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 8187e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 8197e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 820a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 8211da177e4SLinus Torvaldsendif 8227e9501fdSRabin Vincentendif 8231da177e4SLinus Torvalds 824f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern. 825f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN 826709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 827709a972eSKees Cookendif 828709a972eSKees Cook 829f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value. 830f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO 831f0fe00d4Sglider@google.comKBUILD_CFLAGS += -ftrivial-auto-var-init=zero 832f02003c8SKees Cookifdef CONFIG_CC_IS_CLANG 833f02003c8SKees Cook# https://bugs.llvm.org/show_bug.cgi?id=45497 834f0fe00d4Sglider@google.comKBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 835f0fe00d4Sglider@google.comendif 836f02003c8SKees Cookendif 837f0fe00d4Sglider@google.com 83839218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes 83939218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers. 84039218ff4SKees CookKBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 84139218ff4SKees Cook 842a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 843a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS 844a82adfd5SKees CookKBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 845a82adfd5SKees Cookendif 846a82adfd5SKees Cook 847606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 8483b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC 84907d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 8502f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 8512f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 8522f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 8532f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 8542f4df001SVasily Gorbik endif 8552f4df001SVasily Gorbik endif 85607d04081SVasily Gorbikendif 85722c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 85822c8542dSSami Tolvanen CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 85922c8542dSSami Tolvanenendif 8603b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 8613b15cdc1SSami Tolvanen ifdef CONFIG_HAVE_C_RECORDMCOUNT 8623b15cdc1SSami Tolvanen BUILD_C_RECORDMCOUNT := y 8633b15cdc1SSami Tolvanen export BUILD_C_RECORDMCOUNT 8643b15cdc1SSami Tolvanen endif 8653b15cdc1SSami Tolvanenendif 866a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 8677d73c3e9SNick Desaulniers # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 868f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 869f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 870f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 871a2546faeSSteven Rostedt endif 872f28bc3c3SVasily Gorbikendif 873f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 874f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 875f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 87616444a8aSArnaldo Carvalho de Meloendif 87716444a8aSArnaldo Carvalho de Melo 87891341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 87991341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 8807d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-inline-functions-called-once 88191341d4bSSam Ravnborgendif 88291341d4bSSam Ravnborg 88390ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 884e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 885e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 88690ad4052SMasahiro Yamadaendif 88790ad4052SMasahiro Yamada 888d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK 889d08b9f0cSSami TolvanenCC_FLAGS_SCS := -fsanitize=shadow-call-stack 890d08b9f0cSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_SCS) 891d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS 892d08b9f0cSSami Tolvanenendif 893d08b9f0cSSami Tolvanen 894dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG 895dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN 8962b868952SAlexander LobakinCC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 8977f69180bSMasahiro YamadaKBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache 898dc5723b0SSami Tolvanenelse 8992b868952SAlexander LobakinCC_FLAGS_LTO := -flto 900dc5723b0SSami Tolvanenendif 901dc5723b0SSami TolvanenCC_FLAGS_LTO += -fvisibility=hidden 90222d429e7SSami Tolvanen 90322d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size 90422d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5 90524845dcbSNick Desaulniers 9060236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion 9070236526dSTor Vic# when using lld < 13.0.0. 90824845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0) 9090236526dSTor Vicifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0) 91024845dcbSNick DesaulniersKBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) 91124845dcbSNick Desaulniersendif 912dc5723b0SSami Tolvanenendif 9130236526dSTor Vicendif 914dc5723b0SSami Tolvanen 915dc5723b0SSami Tolvanenifdef CONFIG_LTO 9165e95325fSSami TolvanenKBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 9175e95325fSSami TolvanenKBUILD_AFLAGS += -fno-lto 918dc5723b0SSami Tolvanenexport CC_FLAGS_LTO 919dc5723b0SSami Tolvanenendif 920dc5723b0SSami Tolvanen 921cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG 922cf68fffbSSami TolvanenCC_FLAGS_CFI := -fsanitize=cfi \ 923cf68fffbSSami Tolvanen -fsanitize-cfi-cross-dso \ 924cf68fffbSSami Tolvanen -fno-sanitize-cfi-canonical-jump-tables \ 925cf68fffbSSami Tolvanen -fno-sanitize-trap=cfi \ 926cf68fffbSSami Tolvanen -fno-sanitize-blacklist 927cf68fffbSSami Tolvanen 928cf68fffbSSami Tolvanenifdef CONFIG_CFI_PERMISSIVE 929cf68fffbSSami TolvanenCC_FLAGS_CFI += -fsanitize-recover=cfi 930cf68fffbSSami Tolvanenendif 931cf68fffbSSami Tolvanen 932cf68fffbSSami Tolvanen# If LTO flags are filtered out, we must also filter out CFI. 933cf68fffbSSami TolvanenCC_FLAGS_LTO += $(CC_FLAGS_CFI) 934cf68fffbSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_CFI) 935cf68fffbSSami Tolvanenexport CC_FLAGS_CFI 936cf68fffbSSami Tolvanenendif 937cf68fffbSSami Tolvanen 938cf536e18SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B 939cf536e18SFeng TangKBUILD_CFLAGS += -falign-functions=64 94009c60546SFeng Tangendif 94109c60546SFeng Tang 942e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 94304e85bbfSAlexey DobriyanNOSTDINC_FLAGS += -nostdinc 944e8e69931SSam Ravnborg 9451da177e4SLinus Torvalds# warn about C99 declaration after statement 946a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 9471da177e4SLinus Torvalds 9480bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 9498289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 9500bb95f80SKees Cook 951070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 952fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 9531da177e4SLinus Torvalds 954552a23a0SGustavo A. R. Silva# In order to make sure new function cast mismatches are not introduced 955552a23a0SGustavo A. R. Silva# in the kernel (to avoid tripping CFI checking), the kernel should be 956552a23a0SGustavo A. R. Silva# globally built with -Wcast-function-type. 957552a23a0SGustavo A. R. SilvaKBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) 958552a23a0SGustavo A. R. Silva 959217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 960217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 961217c3e01SStephen Rothwell 9625c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 9635a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 9645c45de21SLinus Torvalds 965adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 966adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 967adc71920SLinus Torvalds 96878a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 9697d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 9707d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized 9717d73c3e9SNick Desaulniersendif 97278a5255fSLinus Torvalds 97386cffecdSKees Cook# The allocators already balk at large sizes, so silence the compiler 97486cffecdSKees Cook# warnings for bounds checks involving those possible values. While 97586cffecdSKees Cook# -Wno-alloc-size-larger-than would normally be used here, earlier versions 97686cffecdSKees Cook# of gcc (<9.1) weirdly don't handle the option correctly when _other_ 97786cffecdSKees Cook# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX 97886cffecdSKees Cook# doesn't work (as it is documented to), silently resolving to "0" prior to 97986cffecdSKees Cook# version 9.1 (and producing an error more recently). Numeric values larger 98086cffecdSKees Cook# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently 98186cffecdSKees Cook# ignored, continuing to default to PTRDIFF_MAX. So, left with no other 98286cffecdSKees Cook# choice, we must perform a versioned check to disable this warning. 98386cffecdSKees Cook# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au 98488b61e3bSNick DesaulniersKBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than 98588b61e3bSNick DesaulniersKBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) 98686cffecdSKees Cook 987fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 9888b42cf2fSMasahiro YamadaKBUILD_CFLAGS += -fno-strict-overflow 989d0115552SLinus Torvalds 9903ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 9917d4eb0d8SMasahiro YamadaKBUILD_CFLAGS += -fno-stack-check 9923ce120b1SLinus Torvalds 9938f7f5c9fSAndi Kleen# conserve stack if available 9947d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 9957d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fconserve-stack 9967d73c3e9SNick Desaulniersendif 9978f7f5c9fSAndi Kleen 998fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 99987de84c9SMasahiro YamadaKBUILD_CFLAGS += -Werror=date-time 1000fe7c36c7SJosh Triplett 1001ea8daa7bSDaniel Wagner# enforce correct pointer usage 1002ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 1003ea8daa7bSDaniel Wagner 1004c834f0e8SKees Cook# Require designated initializers for all marked structures 1005c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 1006c834f0e8SKees Cook 1007a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 1008a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 1009a73619a8SMasahiro Yamada 1010e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed 1011e0fe0bbeSMasahiro Yamadainclude-y := scripts/Makefile.extrawarn 10126947fd96SMasahiro Yamadainclude-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1013e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN) += scripts/Makefile.kasan 1014e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1015e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1016e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV) += scripts/Makefile.kcov 1017613f4b3eSKees Cookinclude-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1018e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1019e0fe0bbeSMasahiro Yamada 1020e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y)) 1021a86fe353SMasahiro Yamada 1022132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last. 1023132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel 1024132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point. 1025bf5438fcSJason Baron 10268cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 10278cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 10288cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 10298cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 103052bcc330SSam Ravnborg 1031a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1 1032a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1 103318991197SRoland McGrath 10340d362be5SNick DesaulniersKBUILD_LDFLAGS += -z noexecstack 10350d362be5SNick Desaulniersifeq ($(CONFIG_LD_IS_BFD),y) 10360d362be5SNick DesaulniersKBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 10370d362be5SNick Desaulniersendif 10380d362be5SNick Desaulniers 10395d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1040*0f1fe9d6SMasahiro YamadaLDFLAGS_vmlinux += -X 10415d7d18f5SDavid Howellsendif 10425d7d18f5SDavid Howells 10435cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 104427f2a4dbSNick DesaulniersLDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags 10455cf896fbSPeter Collingbourneendif 10465cf896fbSPeter Collingbourne 104759612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the 104859612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script. 104959612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN 105059612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn 105159612b24SNathan Chancellorendif 105259612b24SNathan Chancellor 10537f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 10547f58b487SMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 10557f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 10567f3a59dbSMasahiro Yamada 105780591e61SLuc Van Oostenryck# make the checker run with the right architecture 105880591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 105980591e61SLuc Van Oostenryck 106014516765SLuc Van Oostenryck# insure the checker run with the right endianness 106114516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 106214516765SLuc Van Oostenryck 10631f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 10641f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 10651f2f01b1SLuc Van Oostenryck 10661da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 10671da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 10681da177e4SLinus Torvalds# set in the environment 10691da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 10701da177e4SLinus Torvalds# this default value 10711da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds# 10741da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 10751da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 10761da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 10771da177e4SLinus Torvalds 10781da177e4SLinus Torvalds# 1079f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1080f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1081f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 1082f4d4ffc0SJason Cooper# 1083f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1084f4d4ffc0SJason Cooper 1085f4d4ffc0SJason Cooper# 10861da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 10871da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 1088070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 10891da177e4SLinus Torvalds# 10901da177e4SLinus Torvalds 1091df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 10921da177e4SLinus Torvaldsexport MODLIB 10931da177e4SLinus Torvalds 1094e00d8880SMasahiro YamadaPHONY += prepare0 1095e2a666d5SRusty Russell 1096ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 10977f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order 10987f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps 109947801c97SMasahiro Yamada 11001da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 11011da177e4SLinus Torvalds 11025750121aSMasahiro Yamadabuild-dir := . 11035750121aSMasahiro Yamadaclean-dirs := $(sort . Documentation \ 110423febe37SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(core-) \ 110595fb6317SMasahiro Yamada $(drivers-) $(libs-)))) 11061da177e4SLinus Torvalds 11075750121aSMasahiro Yamadaexport ARCH_CORE := $(core-y) 11085750121aSMasahiro Yamadaexport ARCH_LIB := $(filter %/, $(libs-y)) 11095750121aSMasahiro Yamadaexport ARCH_DRIVERS := $(drivers-y) $(drivers-m) 11101f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 11115750121aSMasahiro Yamada 111232164845SMasahiro YamadaKBUILD_VMLINUX_OBJS := ./built-in.a 1113f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES 1114f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1115f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1116f0d50ca0SMasahiro Yamadaelse 1117f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1118f0d50ca0SMasahiro Yamadaendif 1119f0d50ca0SMasahiro Yamada 112032164845SMasahiro Yamadaexport KBUILD_VMLINUX_LIBS 112195698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 11221da177e4SLinus Torvalds 11233fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 11243fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 11252441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 11261f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 11271f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 11281f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 11291f50b80aSMasahiro YamadaKBUILD_MODULES := 1 1130fb2d99beSMasahiro Yamada 11315750121aSMasahiro Yamadaautoksyms_recursive: $(build-dir) modules.order 1132fb2d99beSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 113353632ba8SMasahiro Yamada "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive" 11341f50b80aSMasahiro Yamadaendif 11351f50b80aSMasahiro Yamada 113607a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 113707a422bbSMasahiro Yamada 113888694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 113988694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 114088694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 114188694cffSQuentin Perret 114207a422bbSMasahiro Yamada$(autoksyms_h): 114388694cffSQuentin Perret $(call cmd,autoksyms_h) 114423121ca2SNicolas Pitre 114532164845SMasahiro Yamada# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 114632164845SMasahiro Yamadaquiet_cmd_ar_vmlinux.a = AR $@ 114732164845SMasahiro Yamada cmd_ar_vmlinux.a = \ 114832164845SMasahiro Yamada rm -f $@; \ 114932164845SMasahiro Yamada $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ 1150ce697cceSMasahiro Yamada $(AR) mPiT $$($(AR) t $@ | head -n1) $@ $$($(AR) t $@ | grep -F --file=$(srctree)/scripts/head-object-list.txt) 115132164845SMasahiro Yamada 115232164845SMasahiro Yamadatargets += vmlinux.a 1153ce697cceSMasahiro Yamadavmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt autoksyms_recursive FORCE 115432164845SMasahiro Yamada $(call if_changed,ar_vmlinux.a) 115532164845SMasahiro Yamada 11567a342e6cSMasahiro YamadaPHONY += vmlinux_o 11577a342e6cSMasahiro Yamadavmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 11589c5a0ac3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o 11599c5a0ac3SMasahiro Yamada 11607a342e6cSMasahiro Yamadavmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o 11617a342e6cSMasahiro Yamada @: 11627a342e6cSMasahiro Yamada 11635d4aeffbSMasahiro YamadaPHONY += vmlinux 11645d4aeffbSMasahiro Yamadavmlinux: vmlinux.o $(KBUILD_LDS) modpost 11655d4aeffbSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux 1166392885eeSMasahiro Yamada 11671da177e4SLinus Torvalds# The actual objects are generated when descending, 11681da177e4SLinus Torvalds# make sure no implicit rule kicks in 11699c5a0ac3SMasahiro Yamada$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; 11701da177e4SLinus Torvalds 1171ba97df45SMasahiro Yamadafilechk_kernel.release = \ 11720d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 11730d0e7718SMichal Marek 117483a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 117524512795SMasahiro Yamadainclude/config/kernel.release: FORCE 11760d0e7718SMichal Marek $(call filechk,kernel.release) 1177cb58455cSSam Ravnborg 1178d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1179d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1180d8821622SMasahiro Yamada# in parallel 1181d8821622SMasahiro YamadaPHONY += scripts 118260df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1183d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1184cb58455cSSam Ravnborg 11851da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 11865bb78269SSam Ravnborg# or the modules are listed in "prepare". 11875bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 11885bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 11895bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 11901da177e4SLinus Torvalds 1191a5139fb3SMasahiro YamadaPHONY += prepare archprepare 11925bb78269SSam Ravnborg 119336de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 11943044dd05SMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 1195a55f283eSMasahiro Yamada include/generated/compile.h include/generated/autoconf.h remove-stale-files 11965bb78269SSam Ravnborg 119765bba042SMasahiro Yamadaprepare0: archprepare 119860df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 1199ed7ceac1SMasahiro Yamada $(Q)$(MAKE) $(build)=. prepare 120086feeaa8SSam Ravnborg 12011da177e4SLinus Torvalds# All the preparing.. 12020d989ac2SMasahiro Yamadaprepare: prepare0 1203b9ab5ebbSJosh Poimboeuf 12041476fee5SMasahiro YamadaPHONY += remove-stale-files 12051476fee5SMasahiro Yamadaremove-stale-files: 12061476fee5SMasahiro Yamada $(Q)$(srctree)/scripts/remove-stale-files 12071476fee5SMasahiro Yamada 12082c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 12097d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 12107d0e5c20SMasahiro Yamada 12112c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 12122c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1213037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1214037fc336SMasahiro Yamada generic=include/asm-generic 12152c1f4f12SMasahiro Yamadauapi-asm-generic: 1216037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1217037fc336SMasahiro Yamada generic=include/uapi/asm-generic 12182c1f4f12SMasahiro Yamada 12191da177e4SLinus Torvalds# Generate some files 12201da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 12231da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 12241da177e4SLinus Torvalds 12251da177e4SLinus Torvaldsuts_len := 64 122663104eecSSam Ravnborgdefine filechk_utsrelease.h 12271da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 12281da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 12291da177e4SLinus Torvalds exit 1; \ 12301da177e4SLinus Torvalds fi; \ 1231ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 12321da177e4SLinus Torvaldsendef 12331da177e4SLinus Torvalds 123463104eecSSam Ravnborgdefine filechk_version.h 12359b82f13eSSasha Levin if [ $(SUBLEVEL) -gt 255 ]; then \ 1236ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 1237207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 12389b82f13eSSasha Levin else \ 12399b82f13eSSasha Levin echo \#define LINUX_VERSION_CODE $(shell \ 1240207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 12419b82f13eSSasha Levin fi; \ 12429b82f13eSSasha Levin echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 124388a68672SSasha Levin ((c) > 255 ? 255 : (c)))'; \ 124488a68672SSasha Levin echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 124588a68672SSasha Levin echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 124688a68672SSasha Levin echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 124763104eecSSam Ravnborgendef 124863104eecSSam Ravnborg 12495c816641SMasahiro Yamada$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) 12505c816641SMasahiro Yamada$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) 125143fee2b2SMasahiro Yamada$(version_h): FORCE 12521da177e4SLinus Torvalds $(call filechk,version.h) 12531da177e4SLinus Torvalds 1254273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 125563104eecSSam Ravnborg $(call filechk,utsrelease.h) 125663104eecSSam Ravnborg 1257a55f283eSMasahiro Yamadafilechk_compile.h = $(srctree)/scripts/mkcompile_h \ 1258a55f283eSMasahiro Yamada "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" 1259a55f283eSMasahiro Yamada 1260a55f283eSMasahiro Yamadainclude/generated/compile.h: FORCE 1261a55f283eSMasahiro Yamada $(call filechk,compile.h) 1262a55f283eSMasahiro Yamada 1263179efcb4SVegard NossumPHONY += headerdep 1264179efcb4SVegard Nossumheaderdep: 12659663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 12669663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1267179efcb4SVegard Nossum 12681da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12698d730cfbSDavid Woodhouse# Kernel headers 12708d730cfbSDavid Woodhouse 1271e6883b18SSam Ravnborg#Default location for installed headers 1272e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1273e6883b18SSam Ravnborg 127459b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 127559b2bd05SMasahiro Yamada cmd_headers_install = \ 127659b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 127759b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 127859b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 12796d716275SDavid Woodhouse 12808d730cfbSDavid WoodhousePHONY += headers_install 128159b2bd05SMasahiro Yamadaheaders_install: headers 128259b2bd05SMasahiro Yamada $(call cmd,headers_install) 12834f193362SPaul Smith 12841da177e4SLinus TorvaldsPHONY += archheaders archscripts 12851da177e4SLinus Torvalds 1286a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 12871da177e4SLinus Torvalds 128859b2bd05SMasahiro YamadaPHONY += headers 128959b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 12901b620d53SMasahiro Yamada $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) 1291d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1292d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 12931f85712eSMike Frysinger 1294e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 129559b2bd05SMasahiro Yamadaprepare: headers 1296e949f4c2SMasahiro Yamadaendif 129768475359SDavid Woodhouse 1298bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1299bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1300bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1301bdd7714bSMasahiro Yamada 13028d730cfbSDavid Woodhouse# --------------------------------------------------------------------------- 130314ccc638SMasahiro Yamada# Install 130414ccc638SMasahiro Yamada 130514ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel. 130675ef3122SRandy Dunlap# If DKMS is installed, 'make install' will eventually recurse back 130775ef3122SRandy Dunlap# to this Makefile to build and install external modules. 130814ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 130914ccc638SMasahiro Yamada 1310f774f5bbSMasahiro Yamadaquiet_cmd_install = INSTALL $(INSTALL_PATH) 1311f774f5bbSMasahiro Yamada cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 131214ccc638SMasahiro Yamada 131314ccc638SMasahiro Yamada# --------------------------------------------------------------------------- 13141bb0b18aSMasahiro Yamada# Tools 13151bb0b18aSMasahiro Yamada 131603f16cd0SJosh Poimboeufifdef CONFIG_OBJTOOL 13170d989ac2SMasahiro Yamadaprepare: tools/objtool 13180d989ac2SMasahiro Yamadaendif 13190d989ac2SMasahiro Yamada 13200d989ac2SMasahiro Yamadaifdef CONFIG_BPF 13210d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF 13220d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids 13230d989ac2SMasahiro Yamadaendif 13240d989ac2SMasahiro Yamadaendif 13250d989ac2SMasahiro Yamada 13260d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean 13270d989ac2SMasahiro Yamada 13280d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 13290d989ac2SMasahiro Yamada 13300d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist 13310d989ac2SMasahiro Yamada# in output directory, skip its clean in that case 13320d989ac2SMasahiro Yamadaresolve_btfids_clean: 13330d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),) 13340d989ac2SMasahiro Yamada $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 13350d989ac2SMasahiro Yamadaendif 13360d989ac2SMasahiro Yamada 13371bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake 13381bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_) 13391bb0b18aSMasahiro Yamadatools_silent=s 13401bb0b18aSMasahiro Yamadaendif 13411bb0b18aSMasahiro Yamada 13421bb0b18aSMasahiro Yamadatools/: FORCE 13431bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 13441bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 13451bb0b18aSMasahiro Yamada 13461bb0b18aSMasahiro Yamadatools/%: FORCE 13471bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 13481bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 13491bb0b18aSMasahiro Yamada 13501bb0b18aSMasahiro Yamada# --------------------------------------------------------------------------- 13515a5da78bSShuah Khan# Kernel selftest 13525a5da78bSShuah Khan 13535a5da78bSShuah KhanPHONY += kselftest 13544062eba9SGuillaume Tuckerkselftest: headers 13552bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 13565a5da78bSShuah Khan 13574062eba9SGuillaume Tuckerkselftest-%: headers FORCE 135817eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1359dcb825a9SWang Long 13603d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 13613d6dee7aSBamvor Jian Zhangkselftest-merge: 13623d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 13636d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 13646d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 13653e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 13663d6dee7aSBamvor Jian Zhang 13675a5da78bSShuah Khan# --------------------------------------------------------------------------- 136837c8a5faSRob Herring# Devicetree files 136937c8a5faSRob Herring 137037c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 137137c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 137237c8a5faSRob Herringendif 137337c8a5faSRob Herring 137437c8a5faSRob Herringifneq ($(dtstree),) 137537c8a5faSRob Herring 1376ee476203SMasahiro Yamada%.dtb: dtbs_prepare 137775e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 137837c8a5faSRob Herring 1379ee476203SMasahiro Yamada%.dtbo: dtbs_prepare 138075e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1381ce88c9c7SViresh Kumar 1382ee476203SMasahiro YamadaPHONY += dtbs dtbs_prepare dtbs_install dtbs_check 1383ee476203SMasahiro Yamadadtbs: dtbs_prepare 138437c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 138537c8a5faSRob Herring 1386ee476203SMasahiro Yamada# include/config/kernel.release is actually needed when installing DTBs because 1387ee476203SMasahiro Yamada# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make 1388ee476203SMasahiro Yamada# dtbs_install depend on it as dtbs_install may run as root. 1389ee476203SMasahiro Yamadadtbs_prepare: include/config/kernel.release scripts_dtc 1390ee476203SMasahiro Yamada 139175e89534SRob Herringifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1392e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1393b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1394b5154bf6SMasahiro Yamadaendif 1395b5154bf6SMasahiro Yamada 1396b5154bf6SMasahiro Yamadadtbs_check: dtbs 13974f0e3a57SRob Herring 139837c8a5faSRob Herringdtbs_install: 13992431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 140037c8a5faSRob Herring 140137c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 140237c8a5faSRob Herringall: dtbs 140337c8a5faSRob Herringendif 140437c8a5faSRob Herring 140537c8a5faSRob Herringendif 140637c8a5faSRob Herring 140737c8a5faSRob HerringPHONY += scripts_dtc 140837c8a5faSRob Herringscripts_dtc: scripts_basic 140937c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 141037c8a5faSRob Herring 1411e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1412e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1413e10c4321SMasahiro Yamadaendif 1414e10c4321SMasahiro Yamada 1415c473a8d0SMasahiro YamadaPHONY += dt_binding_check 14164f0e3a57SRob Herringdt_binding_check: scripts_dtc 14174f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 14184f0e3a57SRob Herring 141937c8a5faSRob Herring# --------------------------------------------------------------------------- 14201da177e4SLinus Torvalds# Modules 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvaldsifdef CONFIG_MODULES 14231da177e4SLinus Torvalds 14241da177e4SLinus Torvalds# By default, build modules as well 14251da177e4SLinus Torvalds 142673d1393eSMichal Marekall: modules 14271da177e4SLinus Torvalds 14284b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider 14294b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to 14304b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them. 14314b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS 14324b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 1 14334b50c8c4SMasahiro Yamadaendif 14344b50c8c4SMasahiro Yamada 14351da177e4SLinus Torvalds# Build modules 1436551559e1STejun Heo# 14371da177e4SLinus Torvalds 1438f73edc89SMasahiro Yamada# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFOBTF_MODULES 1439f73edc89SMasahiro Yamada# is an exception. 1440f73edc89SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF_MODULES 1441f73edc89SMasahiro Yamadamodules: vmlinux 1442f73edc89SMasahiro Yamadaendif 1443f73edc89SMasahiro Yamada 1444f73edc89SMasahiro Yamadamodules: modules_prepare 14451da177e4SLinus Torvalds 14461da177e4SLinus Torvalds# Target to prepare building external modules 1447059bc9fcSMasahiro Yamadamodules_prepare: prepare 1448596b0474SMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/module.lds 14491da177e4SLinus Torvalds 1450961ab4a3SMasahiro Yamadaexport modules_sign_only := 14511da177e4SLinus Torvalds 1452961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y) 1453961ab4a3SMasahiro YamadaPHONY += modules_sign 1454961ab4a3SMasahiro Yamadamodules_sign: modules_install 1455961ab4a3SMasahiro Yamada @: 1456961ab4a3SMasahiro Yamada 1457961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install. 1458961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 1459961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),) 1460961ab4a3SMasahiro Yamadamodules_sign_only := y 1461961ab4a3SMasahiro Yamadaendif 1462961ab4a3SMasahiro Yamadaendif 1463961ab4a3SMasahiro Yamada 1464961ab4a3SMasahiro Yamadamodinst_pre := 1465961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),) 1466961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre 1467961ab4a3SMasahiro Yamadaendif 1468961ab4a3SMasahiro Yamada 1469961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre) 14703e3005dfSMasahiro YamadaPHONY += __modinst_pre 14713e3005dfSMasahiro Yamada__modinst_pre: 14721da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 14731da177e4SLinus Torvalds @rm -f $(MODLIB)/source 14741da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 14758e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 14761da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 14771da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 14787e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 14791da177e4SLinus Torvalds fi 14801bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 14812c6d9636SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 14822c6d9636SMasahiro Yamada @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 14831da177e4SLinus Torvalds 14841da177e4SLinus Torvaldsendif # CONFIG_MODULES 14851da177e4SLinus Torvalds 14861da177e4SLinus Torvalds### 14871da177e4SLinus Torvalds# Cleaning is done on three levels. 14881da177e4SLinus Torvalds# make clean Delete most generated files 14891da177e4SLinus Torvalds# Leave enough to build external modules 14901da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 14911da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 14921da177e4SLinus Torvalds 14931da177e4SLinus Torvalds# Directories & files removed with 'make clean' 149469bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ 14953d32285fSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps \ 14965d4aeffbSMasahiro Yamada compile_commands.json .thinlto-cache .vmlinux.objs .vmlinux.export.c 14971da177e4SLinus Torvalds 14981da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 14990663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 1500b0d6207bSMasahiro Yamada arch/$(SRCARCH)/include/generated .objdiff \ 15010663c68cSMasahiro Yamada debian snap tar-install \ 15020663c68cSMasahiro Yamada .config .config.old .version \ 150346457133SMasahiro Yamada Module.symvers \ 15045cca3606SMasahiro Yamada certs/signing_key.pem \ 1505b31f2a49SNayna Jain certs/x509.genkey \ 1506b31f2a49SNayna Jain vmlinux-gdb.py \ 150746a63d4bSMasahiro Yamada *.spec 15081da177e4SLinus Torvalds 15091da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 15101da177e4SLinus Torvalds# 15111da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 15121da177e4SLinus Torvalds 151376cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 15141da177e4SLinus Torvalds 1515bd1ee804SPawel Mollvmlinuxclean: 1516bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1517fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1518bd1ee804SPawel Moll 151950d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean 15201da177e4SLinus Torvalds 15211da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 15221da177e4SLinus Torvalds# 15231da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1524cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 15251da177e4SLinus Torvalds 1526b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 15271da177e4SLinus Torvalds$(mrproper-dirs): 15281da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 15291da177e4SLinus Torvalds 1530b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 15311da177e4SLinus Torvalds $(call cmd,rmfiles) 15321da177e4SLinus Torvalds 15331da177e4SLinus Torvalds# distclean 15341da177e4SLinus Torvalds# 15354f193362SPaul SmithPHONY += distclean 15361da177e4SLinus Torvalds 15371da177e4SLinus Torvaldsdistclean: mrproper 153819c8d912SMasahiro Yamada @find . $(RCS_FIND_IGNORE) \ 15391da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1540f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 15417a02cec5SMasahiro Yamada -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 15427a02cec5SMasahiro Yamada -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 15431da177e4SLinus Torvalds -type f -print | xargs rm -f 15441da177e4SLinus Torvalds 15451da177e4SLinus Torvalds 15461da177e4SLinus Torvalds# Packaging of the kernel to various formats 15471da177e4SLinus Torvalds# --------------------------------------------------------------------------- 15481da177e4SLinus Torvalds 1549bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1550000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1551031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1552000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 15531da177e4SLinus Torvalds 15541da177e4SLinus Torvalds# Brief documentation of the typical targets used 15551da177e4SLinus Torvalds# --------------------------------------------------------------------------- 15561da177e4SLinus Torvalds 15575dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1558a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 15595dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 15605dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 15611da177e4SLinus Torvalds 1562fe69b420SMasahiro YamadaPHONY += help 15631da177e4SLinus Torvaldshelp: 15641da177e4SLinus Torvalds @echo 'Cleaning targets:' 15655ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 15665cc8d246SJesper Juhl @echo ' enough build support to build external modules' 15675ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 15685cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 15691da177e4SLinus Torvalds @echo '' 15701da177e4SLinus Torvalds @echo 'Configuration targets:' 15711da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 15721da177e4SLinus Torvalds @echo '' 15731da177e4SLinus Torvalds @echo 'Other generic targets:' 15741da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 15751da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 15761da177e4SLinus Torvalds @echo '* modules - Build all modules' 15779cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 15781da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 157940ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1580433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1581433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 158262718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 158362718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1584155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1585c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 15861da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 15871da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1588f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 15893f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 15903f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 15913f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 15922fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 159359df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 15942fb9b1bdSSam Ravnborg echo '' 159531b8cc80SRandy Dunlap @echo 'Static analysers:' 15961da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1597aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1598ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1599295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 160074425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 16017f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 16026ad7cbc0SNathan Huckleberry @echo ' clang-analyzer - Check with clang static analyzer' 16036ad7cbc0SNathan Huckleberry @echo ' clang-tidy - Check with clang-tidy' 160474425eeeSNicolas Palix @echo '' 1605eb8305aeSMatthias Maennich @echo 'Tools:' 1606eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1607eb8305aeSMatthias Maennich @echo '' 160831b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1609e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 16105a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 16115a5da78bSShuah Khan @echo ' running kselftest on it' 1612e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1613e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1614e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1615dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1616e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1617e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 16185a5da78bSShuah Khan @echo '' 161937c8a5faSRob Herring @$(if $(dtstree), \ 162037c8a5faSRob Herring echo 'Devicetree:'; \ 162137c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 162237c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 16237aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 16247aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 162537c8a5faSRob Herring echo '') 162637c8a5faSRob Herring 162731b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 162831b8cc80SRandy Dunlap @echo ' use "make tools/help"' 162931b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 163031b8cc80SRandy Dunlap @echo '' 16311da177e4SLinus Torvalds @echo 'Kernel packaging:' 1632000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 16331da177e4SLinus Torvalds @echo '' 16341da177e4SLinus Torvalds @echo 'Documentation targets:' 1635cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 16361da177e4SLinus Torvalds @echo '' 163701dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 16385c816641SMasahiro Yamada @$(or $(archhelp),\ 163901dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 16401da177e4SLinus Torvalds @echo '' 16411da177e4SLinus Torvalds @$(if $(boards), \ 16421da177e4SLinus Torvalds $(foreach b, $(boards), \ 16434234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 16441da177e4SLinus Torvalds echo '') 16455dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 16465dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 16475dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 16485dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 16495dffbe81SSegher Boessenkool echo '') 16501da177e4SLinus Torvalds 16511da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 165245d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 16531da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1654a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1655a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1656701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1657af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1658e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 165928bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 166028bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 166128bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1662c77d06e7SYann Droneaud @echo ' e: warnings are being treated as errors' 1663a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 16641da177e4SLinus Torvalds @echo '' 16651da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 16661da177e4SLinus Torvalds @echo 'For further info see the ./README file' 16671da177e4SLinus Torvalds 16681da177e4SLinus Torvalds 16695dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 16705dffbe81SSegher Boessenkool 16715dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 16725dffbe81SSegher Boessenkool 1673fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 16745dffbe81SSegher Boessenkool 16755dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 16765dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 16775dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 16785dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 16795dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 16805dffbe81SSegher Boessenkool echo '') 16815dffbe81SSegher Boessenkool 16825dffbe81SSegher Boessenkool 16831da177e4SLinus Torvalds# Documentation targets 16841da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1685e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1686e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 168722cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1688bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1689cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 16901da177e4SLinus Torvalds 169167274c08SMasahiro Yamada# Misc 169267274c08SMasahiro Yamada# --------------------------------------------------------------------------- 169367274c08SMasahiro Yamada 169467274c08SMasahiro YamadaPHONY += scripts_gdb 16957a739ce5SMasahiro Yamadascripts_gdb: prepare0 16961e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 16978d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 169867274c08SMasahiro Yamada 169967274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 170067274c08SMasahiro Yamadaall: scripts_gdb 170167274c08SMasahiro Yamadaendif 170267274c08SMasahiro Yamada 17031da177e4SLinus Torvaldselse # KBUILD_EXTMOD 17041da177e4SLinus Torvalds 17051da177e4SLinus Torvalds### 17061da177e4SLinus Torvalds# External module support. 17071da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 17081da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 17091da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 171011122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used. 17111da177e4SLinus Torvalds 17126212804fSMasahiro Yamada# We are always building only modules. 17136212804fSMasahiro YamadaKBUILD_BUILTIN := 17141da177e4SLinus TorvaldsKBUILD_MODULES := 1 17151da177e4SLinus Torvalds 17165750121aSMasahiro Yamadabuild-dir := $(KBUILD_EXTMOD) 17173d32285fSMasahiro Yamada 17187f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json 17193d32285fSMasahiro YamadaPHONY += compile_commands.json 17203d32285fSMasahiro Yamada 172176cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 17223d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ 1723dc5723b0SSami Tolvanen $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache 17241da177e4SLinus Torvalds 17256072b2c4SMasahiro YamadaPHONY += prepare 17266072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations 17276072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 17286072b2c4SMasahiro Yamadaprepare: 1729129ab0d2SMasahiro Yamada @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 17306072b2c4SMasahiro Yamada echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1731129ab0d2SMasahiro Yamada echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 17326072b2c4SMasahiro Yamada echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 17336072b2c4SMasahiro Yamada fi 17346072b2c4SMasahiro Yamada 1735fe69b420SMasahiro YamadaPHONY += help 17361da177e4SLinus Torvaldshelp: 17371da177e4SLinus Torvalds @echo ' Building external modules.' 17381da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 17391da177e4SLinus Torvalds @echo '' 17401da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 17411da177e4SLinus Torvalds @echo ' modules_install - install the module' 17421da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 17431da177e4SLinus Torvalds @echo '' 174406300b21SSam Ravnborg 17451da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 17461da177e4SLinus Torvalds 17473e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 17483e3005dfSMasahiro Yamada# Modules 17493e3005dfSMasahiro Yamada 17507f371813SMasahiro YamadaPHONY += modules modules_install modules_prepare 17513e3005dfSMasahiro Yamada 17523e3005dfSMasahiro Yamadaifdef CONFIG_MODULES 17533e3005dfSMasahiro Yamada 17545750121aSMasahiro Yamada$(MODORDER): $(build-dir) 17555750121aSMasahiro Yamada @: 17565750121aSMasahiro Yamada 1757f73edc89SMasahiro Yamada# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. 1758f73edc89SMasahiro Yamada# This is solely useful to speed up test compiles. 1759f73edc89SMasahiro Yamadamodules: modpost 1760f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1) 1761f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 1762f73edc89SMasahiro Yamadaendif 17633e3005dfSMasahiro Yamada 17641a998be6SMasahiro YamadaPHONY += modules_check 17651a998be6SMasahiro Yamadamodules_check: $(MODORDER) 17661a998be6SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 17671a998be6SMasahiro Yamada 17683ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD $(MODLIB) 17693e3005dfSMasahiro Yamada cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 17703e3005dfSMasahiro Yamada $(KERNELRELEASE) 17713e3005dfSMasahiro Yamada 17723e3005dfSMasahiro Yamadamodules_install: 17733e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 17743e3005dfSMasahiro Yamada $(call cmd,depmod) 17753e3005dfSMasahiro Yamada 17763e3005dfSMasahiro Yamadaelse # CONFIG_MODULES 17773e3005dfSMasahiro Yamada 17783e3005dfSMasahiro Yamada# Modules not configured 17793e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 17803e3005dfSMasahiro Yamada 17813e3005dfSMasahiro Yamadamodules modules_install: 17823e3005dfSMasahiro Yamada @echo >&2 '***' 17833e3005dfSMasahiro Yamada @echo >&2 '*** The present kernel configuration has modules disabled.' 17843e3005dfSMasahiro Yamada @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' 17853e3005dfSMasahiro Yamada @echo >&2 '*** to enable CONFIG_MODULES.' 17863e3005dfSMasahiro Yamada @echo >&2 '***' 17873e3005dfSMasahiro Yamada @exit 1 17883e3005dfSMasahiro Yamada 1789f110e5a2SMasahiro YamadaKBUILD_MODULES := 1790f110e5a2SMasahiro Yamada 17913e3005dfSMasahiro Yamadaendif # CONFIG_MODULES 17923e3005dfSMasahiro Yamada 1793f73edc89SMasahiro YamadaPHONY += modpost 1794f73edc89SMasahiro Yamadamodpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ 1795f73edc89SMasahiro Yamada $(if $(KBUILD_MODULES), modules_check) 1796f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1797f73edc89SMasahiro Yamada 1798b1fbfcb4SMasahiro Yamada# Single targets 1799b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1800b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1801b1fbfcb4SMasahiro Yamada# 1802b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1803b1fbfcb4SMasahiro Yamada# 1804b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1805b1fbfcb4SMasahiro Yamada# 1806b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1807b1fbfcb4SMasahiro Yamada# 1808b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1809b1fbfcb4SMasahiro Yamada 1810b1fbfcb4SMasahiro Yamadaifdef single-build 1811b1fbfcb4SMasahiro Yamada 1812b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1813b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1814fc93a4cdSMasahiro Yamadasingle-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 1815fc93a4cdSMasahiro Yamada $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 1816b1fbfcb4SMasahiro Yamada 1817f73edc89SMasahiro Yamada$(single-ko): single_modules 1818b1fbfcb4SMasahiro Yamada @: 18195750121aSMasahiro Yamada$(single-no-ko): $(build-dir) 1820b1fbfcb4SMasahiro Yamada @: 1821b1fbfcb4SMasahiro Yamada 1822f110e5a2SMasahiro Yamada# Remove MODORDER when done because it is not the real one. 1823f73edc89SMasahiro YamadaPHONY += single_modules 1824f73edc89SMasahiro Yamadasingle_modules: $(single-no-ko) modules_prepare 18257f69180bSMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER) 1826b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1827f73edc89SMasahiro Yamadaifneq ($(KBUILD_MODPOST_NOFINAL),1) 1828f73edc89SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 1829f73edc89SMasahiro Yamadaendif 1830f110e5a2SMasahiro Yamada $(Q)rm -f $(MODORDER) 1831b1fbfcb4SMasahiro Yamada 18325750121aSMasahiro Yamadasingle-goals := $(addprefix $(build-dir)/, $(single-no-ko)) 1833b1fbfcb4SMasahiro Yamada 1834b1fbfcb4SMasahiro Yamadaendif 1835b1fbfcb4SMasahiro Yamada 1836c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1837c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1838c99f3918SMasahiro Yamada# make menuconfig etc. 1839c99f3918SMasahiro Yamada# Error messages still appears in the original language 18405750121aSMasahiro YamadaPHONY += $(build-dir) 18415750121aSMasahiro Yamada$(build-dir): prepare 18425750121aSMasahiro Yamada $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) 1843c99f3918SMasahiro Yamada 184476cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 184576cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 184676cd306dSMasahiro Yamada$(clean-dirs): 184776cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 184876cd306dSMasahiro Yamada 184988d7be03SMichal Marekclean: $(clean-dirs) 185088d7be03SMichal Marek $(call cmd,rmfiles) 18515c816641SMasahiro Yamada @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1852ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 18534f0e3a57SRob Herring -o -name '*.ko.*' \ 1854ce88c9c7SViresh Kumar -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1855ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 18569413e764SMasahiro Yamada -o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \ 185788d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 18589a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 18594fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 186088d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 1861b0d6207bSMasahiro Yamada -o -name '.tmp_*' \ 18626b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1863433db3e2SVinÃcius Tinti -o -name '*.ll' \ 186438e89184SSami Tolvanen -o -name '*.gcno' \ 186538e89184SSami Tolvanen -o -name '*.*.symversions' \) -type f -print | xargs rm -f 186688d7be03SMichal Marek 18671da177e4SLinus Torvalds# Generate tags for editors 18681da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1869a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1870858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 18711da177e4SLinus Torvalds 1872f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 18731da177e4SLinus Torvalds $(call cmd,tags) 18741da177e4SLinus Torvalds 1875eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1876eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1877eb8305aeSMatthias Maennich 1878eb8305aeSMatthias MaennichPHONY += nsdeps 1879bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1880eb8305aeSMatthias Maennichnsdeps: modules 1881bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1882eb8305aeSMatthias Maennich 18833d32285fSMasahiro Yamada# Clang Tooling 18843d32285fSMasahiro Yamada# --------------------------------------------------------------------------- 18853d32285fSMasahiro Yamada 18863d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN $@ 18873d32285fSMasahiro Yamada cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 18883d32285fSMasahiro Yamada 18897f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ 189032164845SMasahiro Yamada $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ 18913d32285fSMasahiro Yamada $(if $(CONFIG_MODULES), $(MODORDER)) FORCE 18923d32285fSMasahiro Yamada $(call if_changed,gen_compile_commands) 18933d32285fSMasahiro Yamada 18947f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json 18953d32285fSMasahiro Yamada 18966ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer 18976ad7cbc0SNathan Huckleberry 18986ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG 18996ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK $< 19006ad7cbc0SNathan Huckleberry cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 19016ad7cbc0SNathan Huckleberry 19027f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json 19036ad7cbc0SNathan Huckleberry $(call cmd,clang_tools) 19046ad7cbc0SNathan Huckleberryelse 19056ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer: 19066ad7cbc0SNathan Huckleberry @echo "$@ requires CC=clang" >&2 19076ad7cbc0SNathan Huckleberry @false 19086ad7cbc0SNathan Huckleberryendif 19096ad7cbc0SNathan Huckleberry 19101da177e4SLinus Torvalds# Scripts to check various things for consistency 19111da177e4SLinus Torvalds# --------------------------------------------------------------------------- 19121da177e4SLinus Torvalds 19137dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report 1914279f3dd3SPeter Foley 19151da177e4SLinus Torvaldsincludecheck: 1916436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 19171da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 191880007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 19191da177e4SLinus Torvalds 19201da177e4SLinus Torvaldsversioncheck: 19212ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 19221da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 192380007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 19241da177e4SLinus Torvalds 192574425eeeSNicolas Palixcoccicheck: 1926858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 192774425eeeSNicolas Palix 1928295ac051SAdrian Bunkexport_report: 1929295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1930295ac051SAdrian Bunk 1931c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1932e3ccf6e3SJeff Dike 1933011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1934011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1935011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1936011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1937011e3a9aSJeff Dikeifeq ($(ARCH), um) 1938011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1939011e3a9aSJeff Dikeelse 1940011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1941011e3a9aSJeff Dikeendif 19421da177e4SLinus Torvaldscheckstack: 19431da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 194475dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 19451da177e4SLinus Torvalds 19467b8ea53dSAmerigo Wangkernelrelease: 19477b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 194801ab1788SAmerigo Wang 1949cb58455cSSam Ravnborgkernelversion: 19502244cbd8SSam Ravnborg @echo $(KERNELVERSION) 19511da177e4SLinus Torvalds 1952c398ff00SMike Marciniszynimage_name: 1953c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1954c398ff00SMike Marciniszyn 19551da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 19560663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 19571da177e4SLinus Torvalds 1958392885eeSMasahiro Yamada# read saved command lines for existing targets 1959392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 19601da177e4SLinus Torvalds 1961b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 19621da177e4SLinus Torvalds 196346b7c492SSZ Lin (林上智)endif # config-build 19642042b548SMasahiro Yamadaendif # mixed-build 1965688931a5SMasahiro Yamadaendif # need-sub-make 19661da177e4SLinus Torvalds 19674f193362SPaul SmithPHONY += FORCE 19681da177e4SLinus TorvaldsFORCE: 19694f193362SPaul Smith 1970bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1971fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 19724f193362SPaul Smith.PHONY: $(PHONY) 1973