1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2bfeffd15SLinus TorvaldsVERSION = 5 3fe07bfdaSLinus TorvaldsPATCHLEVEL = 12 455922c9dSLinus TorvaldsSUBLEVEL = 0 59f4ad9e4SLinus TorvaldsEXTRAVERSION = 6fe07bfdaSLinus TorvaldsNAME = Frozen Wasteland 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 $(error building multiple external modules is not supported)) 131bcf637f5SMasahiro Yamada 132bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD 133bcf637f5SMasahiro Yamada 13425b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 13525b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 13625b146c5SMasahiro Yamada# 13725b146c5SMasahiro Yamada# For example, you can do this: 13825b146c5SMasahiro Yamada# 13925b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 14025b146c5SMasahiro Yamada# 14125b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 14225b146c5SMasahiro Yamada# two syntaxes to specify it. 14325b146c5SMasahiro Yamada# 1441da177e4SLinus Torvalds# 1) O= 1451da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1461da177e4SLinus Torvalds# 1471da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 14825b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 14925b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1501da177e4SLinus Torvalds# 1511da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1521da177e4SLinus Torvalds# variable. 1531da177e4SLinus Torvalds 15425b146c5SMasahiro Yamada# Do we want to change the working directory? 1551da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1561da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1571da177e4SLinus Torvaldsendif 1581da177e4SLinus Torvalds 15925b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 16025b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 16125b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 16225b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 16325b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 16425b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 16525b146c5SMasahiro Yamada 16625b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 16725b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 16825b146c5SMasahiro Yamadaelse 16925b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 17025b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 17125b146c5SMasahiro Yamada 17225b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 17325b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 17425b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 17525b146c5SMasahiro Yamadaelse 17625b146c5SMasahiro Yamadaneed-sub-make := 1 17751193b76SRobert Jarzmikendif 17851193b76SRobert Jarzmik 17930cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 18030cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile))) 1811da177e4SLinus Torvalds 18225b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 18325b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 18425b146c5SMasahiro Yamadaendif 18525b146c5SMasahiro Yamada 18625b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 18780463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 18880463f1bSMasahiro Yamada# 18980463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed 19025b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make. 19125b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 192688931a5SMasahiro Yamadaneed-sub-make := 1 19325b146c5SMasahiro Yamadaendif 1943812b8c5SMasahiro Yamada 195688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 196688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 197688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 198688931a5SMasahiro Yamadaneed-sub-make := 1 199688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 20093fdddfeSMasahiro Yamada$(this-makefile): ; 201688931a5SMasahiro Yamadaendif 202688931a5SMasahiro Yamada 20325b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 204221cc2d2SMasahiro Yamadaexport sub_make_done := 1 205221cc2d2SMasahiro Yamada 206688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 207688931a5SMasahiro Yamada 208121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 2090b35786dSMilton Miller 210121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 21116f89098SCharles Keepax @: 2120b35786dSMilton Miller 213c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 214121c2a13SMasahiro Yamada__sub-make: 21525b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 2161da177e4SLinus Torvalds 217688931a5SMasahiro Yamadaendif # need-sub-make 218221cc2d2SMasahiro Yamadaendif # sub_make_done 219688931a5SMasahiro Yamada 2201da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 221688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 2221da177e4SLinus Torvalds 2237ff52571SMasahiro Yamada# Do not print "Entering directory ...", 2247ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 2257ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 2267ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 2277ff52571SMasahiro Yamada 22825b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2299da0763bSMichal Marek # building in the source tree 2309da0763bSMichal Marek srctree := . 231051f278eSMasahiro Yamada building_out_of_srctree := 2329da0763bSMichal Marekelse 23325b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2349da0763bSMichal Marek # building in a subdirectory of the source tree 2359da0763bSMichal Marek srctree := .. 2369da0763bSMichal Marek else 23725b146c5SMasahiro Yamada srctree := $(abs_srctree) 2389da0763bSMichal Marek endif 239051f278eSMasahiro Yamada building_out_of_srctree := 1 2409da0763bSMichal Marekendif 2412c1f4f12SMasahiro Yamada 24295fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 24395fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 24495fd3f87SMasahiro Yamadaendif 2452c1f4f12SMasahiro Yamada 2467e1c0477SMichal Marekobjtree := . 2476b12de69SMasahiro YamadaVPATH := $(srctree) 2481da177e4SLinus Torvalds 249051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2501da177e4SLinus Torvalds 2512c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2522c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2532c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2542c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2552c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2562c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2572c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2582c1f4f12SMasahiro Yamada 2592c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2602c1f4f12SMasahiro Yamada 26122340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 26222340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2632c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 26459b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2654623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 2664623980dSDavid Engraf outputmakefile 267805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install 268805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed. 269805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \ 270805b2e1dSMasahiro Yamada headers_install modules_install kernelrelease image_name 271993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ 272993bdde9SMasahiro Yamada image_name 273394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 2742c1f4f12SMasahiro Yamada 2752042b548SMasahiro Yamadaconfig-build := 2762042b548SMasahiro Yamadamixed-build := 2772042b548SMasahiro Yamadaneed-config := 1 278805b2e1dSMasahiro Yamadaneed-compiler := 1 279d7942413SMasahiro Yamadamay-sync-config := 1 280394053f4SMasahiro Yamadasingle-build := 2812c1f4f12SMasahiro Yamada 2822c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2832c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2842042b548SMasahiro Yamada need-config := 2852c1f4f12SMasahiro Yamada endif 2862c1f4f12SMasahiro Yamadaendif 2872c1f4f12SMasahiro Yamada 288805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) 289805b2e1dSMasahiro Yamada ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) 290805b2e1dSMasahiro Yamada need-compiler := 291805b2e1dSMasahiro Yamada endif 292805b2e1dSMasahiro Yamadaendif 293805b2e1dSMasahiro Yamada 294d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 295d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 2962042b548SMasahiro Yamada may-sync-config := 297d7942413SMasahiro Yamada endif 298d7942413SMasahiro Yamadaendif 299d7942413SMasahiro Yamada 300d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 3012042b548SMasahiro Yamada may-sync-config := 302d7942413SMasahiro Yamadaendif 303d7942413SMasahiro Yamada 3042c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 305efbf9726SMasahiro Yamada ifneq ($(filter %config,$(MAKECMDGOALS)),) 3062042b548SMasahiro Yamada config-build := 1 3072c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 3082042b548SMasahiro Yamada mixed-build := 1 3092c1f4f12SMasahiro Yamada endif 3102c1f4f12SMasahiro Yamada endif 3112c1f4f12SMasahiro Yamadaendif 31222340a06SMasahiro Yamada 313394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 314394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 315394053f4SMasahiro Yamada single-build := 1 316394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 317394053f4SMasahiro Yamada mixed-build := 1 318394053f4SMasahiro Yamada endif 319394053f4SMasahiro Yamadaendif 320394053f4SMasahiro Yamada 32122340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 32222340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 32322340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3242042b548SMasahiro Yamada mixed-build := 1 32522340a06SMasahiro Yamada endif 32622340a06SMasahiro Yamadaendif 32722340a06SMasahiro Yamada 3282c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3292c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3302c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3312042b548SMasahiro Yamada mixed-build := 1 3322c1f4f12SMasahiro Yamada endif 3332c1f4f12SMasahiro Yamadaendif 3342c1f4f12SMasahiro Yamada 3352042b548SMasahiro Yamadaifdef mixed-build 3362c1f4f12SMasahiro Yamada# =========================================================================== 3372c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3382c1f4f12SMasahiro Yamada# Handle them one by one. 3392c1f4f12SMasahiro Yamada 3402c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3412c1f4f12SMasahiro Yamada 342121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 3432c1f4f12SMasahiro Yamada @: 3442c1f4f12SMasahiro Yamada 3452c1f4f12SMasahiro Yamada__build_one_by_one: 3462c1f4f12SMasahiro Yamada $(Q)set -e; \ 3472c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3482c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3492c1f4f12SMasahiro Yamada done 3502c1f4f12SMasahiro Yamada 3512042b548SMasahiro Yamadaelse # !mixed-build 3522c1f4f12SMasahiro Yamada 3533204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include 3542c1f4f12SMasahiro Yamada 3552c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3562c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 3572c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3582c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3592c1f4f12SMasahiro Yamada 3603204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3631da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3641da177e4SLinus Torvalds# 3651da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3661da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3671da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3681da177e4SLinus Torvalds# make ARCH=ia64 3691da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3701da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3731da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3741da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3751da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3761da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3771da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3781da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3791da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3802331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds# Architecture as present in compile.h 3831da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3846752ed90SThomas GleixnerSRCARCH := $(ARCH) 3851da177e4SLinus Torvalds 386d746d647SSam Ravnborg# Additional ARCH settings for x86 387d746d647SSam Ravnborgifeq ($(ARCH),i386) 388d746d647SSam Ravnborg SRCARCH := x86 389d746d647SSam Ravnborgendif 390d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 391d746d647SSam Ravnborg SRCARCH := x86 392d746d647SSam Ravnborgendif 39374b469f2SSam Ravnborg 3945e538790SSam Ravnborg# Additional ARCH settings for sparc 395e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 396e69f58c0SNamhyung Kim SRCARCH := sparc 397e69f58c0SNamhyung Kimendif 398a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 3995e538790SSam Ravnborg SRCARCH := sparc 400a439fe51SSam Ravnborgendif 4012fb9b1bdSSam Ravnborg 402f02aa48dSMasahiro Yamadaexport cross_compiling := 403f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH)) 404f02aa48dSMasahiro Yamadacross_compiling := 1 405f02aa48dSMasahiro Yamadaendif 406f02aa48dSMasahiro Yamada 40714cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 40841263fc6SBen Gardinerexport KCONFIG_CONFIG 40914cdd3c4SRoman Zippel 4101da177e4SLinus Torvalds# SHELL used by kbuild 411858805b3SMasahiro YamadaCONFIG_SHELL := sh 4121da177e4SLinus Torvalds 4136d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4146d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4156d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 416d7f14c66SUwe Kleine-König 417a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 418a0d1c951SMasahiro YamadaHOSTCC = clang 419a0d1c951SMasahiro YamadaHOSTCXX = clang++ 420a0d1c951SMasahiro Yamadaelse 4211da177e4SLinus TorvaldsHOSTCC = gcc 4221da177e4SLinus TorvaldsHOSTCXX = g++ 423a0d1c951SMasahiro Yamadaendif 4247f3a59dbSMasahiro Yamada 4257f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 4267f3a59dbSMasahiro Yamada -O2 -fomit-frame-pointer -std=gnu89 4277f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS := 4287f3a59dbSMasahiro Yamada 4297f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 430735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 431f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 432f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds# Make variables (CC, etc...) 4351da177e4SLinus TorvaldsCPP = $(CC) -E 436a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 437a0d1c951SMasahiro YamadaCC = clang 438a0d1c951SMasahiro YamadaLD = ld.lld 439a0d1c951SMasahiro YamadaAR = llvm-ar 440a0d1c951SMasahiro YamadaNM = llvm-nm 441a0d1c951SMasahiro YamadaOBJCOPY = llvm-objcopy 442a0d1c951SMasahiro YamadaOBJDUMP = llvm-objdump 443a0d1c951SMasahiro YamadaREADELF = llvm-readelf 444a0d1c951SMasahiro YamadaSTRIP = llvm-strip 445a0d1c951SMasahiro Yamadaelse 446a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 447a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 4481da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4491da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4501da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4511da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 452eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 453a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 454a0d1c951SMasahiro Yamadaendif 455e83b9f55SAndrii NakryikoPAHOLE = pahole 456c9a0f3b8SJiri OlsaRESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 45773a4f6dbSMasahiro YamadaLEX = flex 45873a4f6dbSMasahiro YamadaYACC = bison 4591da177e4SLinus TorvaldsAWK = awk 460caa27b66SSam RavnborgINSTALLKERNEL := installkernel 461436e980eSDominique MartinetDEPMOD = depmod 4621da177e4SLinus TorvaldsPERL = perl 463e9781b52SMasahiro YamadaPYTHON3 = python3 4641da177e4SLinus TorvaldsCHECK = sparse 465858805b3SMasahiro YamadaBASH = bash 466e4a42c82SDenis EfremovKGZIP = gzip 467e4a42c82SDenis EfremovKBZIP2 = bzip2 468e4a42c82SDenis EfremovKLZOP = lzop 4698dfb61dcSDenis EfremovLZMA = lzma 4708dfb61dcSDenis EfremovLZ4 = lz4c 4718dfb61dcSDenis EfremovXZ = xz 47248f7ddf7SNick TerrellZSTD = zstd 4738dfb61dcSDenis Efremov 47480a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 4756c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 4760c22be07SDouglas AndersonNOSTDINC_FLAGS := 4776588169dSSam RavnborgCFLAGS_MODULE = 4786588169dSSam RavnborgAFLAGS_MODULE = 4796588169dSSam RavnborgLDFLAGS_MODULE = 4801da177e4SLinus TorvaldsCFLAGS_KERNEL = 4811da177e4SLinus TorvaldsAFLAGS_KERNEL = 482b36fad65SMichal MarekLDFLAGS_vmlinux = 4831da177e4SLinus Torvalds 484abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 485abbf1590SDavid HowellsUSERINCLUDE := \ 4869d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 4879d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 488abbf1590SDavid Howells -I$(srctree)/include/uapi \ 4893308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 490ce6ed1c4SMasahiro Yamada -include $(srctree)/include/linux/compiler-version.h \ 491abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 492abbf1590SDavid Howells 4931da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 4941da177e4SLinus Torvalds# Needed to be compatible with the O= option 495abbf1590SDavid HowellsLINUXINCLUDE := \ 4969d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 4979d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 498051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 499f8224f7fSMasahiro Yamada -I$(objtree)/include \ 500f8224f7fSMasahiro Yamada $(USERINCLUDE) 5011da177e4SLinus Torvalds 50242a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 503eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 50442a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 505b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 506172aad81SOlaf Hering -Werror=return-type -Wno-format-security \ 507433dc2ebSMasahiro Yamada -std=gnu89 508433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 50980c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 51080c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 5116588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 5126588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 51310df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 514d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 5155241ab4cSMasahiro YamadaCLANG_FLAGS := 5161da177e4SLinus Torvalds 517aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC 518d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 519d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 52048f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 5217bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 5221da177e4SLinus Torvalds 523d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 5240e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 525222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 5266588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 52780c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds# Files to ignore in find ... statements 5301da177e4SLinus Torvalds 531ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 532ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 533ae63b2d7SPrarit Bhargava -prune -o 534450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 535450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds# =========================================================================== 5381da177e4SLinus Torvalds# Rules shared between *config targets and build targets 5391da177e4SLinus Torvalds 540312a3d09SCao jin# Basic helpers built in scripts/basic/ 5414f193362SPaul SmithPHONY += scripts_basic 5421da177e4SLinus Torvaldsscripts_basic: 5431da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 544638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 5451da177e4SLinus Torvalds 5464f193362SPaul SmithPHONY += outputmakefile 547e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 548fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 549fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 550fd5f0cd6SJan Beulich# output directory. 5513a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 5523a51ff34SVladimir Kondratiev# ignore whole output directory 5531da177e4SLinus Torvaldsoutputmakefile: 554051f278eSMasahiro Yamadaifdef building_out_of_srctree 555e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 556e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 557e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 558e8e83a23SMasahiro Yamada echo >&2 "***"; \ 559e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 560e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 561e8e83a23SMasahiro Yamada echo >&2 "***"; \ 562e8e83a23SMasahiro Yamada false; \ 563e8e83a23SMasahiro Yamada fi 56492979997SAndi Kleen $(Q)ln -fsn $(srctree) source 5654fd61277SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 566156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 567156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 568fd5f0cd6SJan Beulichendif 5691da177e4SLinus Torvalds 570db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 571db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 572db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 573db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade. 5746e0839fdSMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell $(CC) --version 2>/dev/null | head -n 1)) 575db07562aSNick Desaulniers 576db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 577ae6b289aSChris Friesifneq ($(CROSS_COMPILE),) 5785241ab4cSMasahiro YamadaCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 579ae6b289aSChris Friesendif 580ba64beb1SMasahiro Yamadaifeq ($(LLVM_IAS),1) 581ba64beb1SMasahiro YamadaCLANG_FLAGS += -integrated-as 582ba64beb1SMasahiro Yamadaelse 583238bcbc4SMasahiro YamadaCLANG_FLAGS += -no-integrated-as 584ae6b289aSChris FriesGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 585ae6b289aSChris FriesCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) 586876a0600SNathan Chancellorendif 587589834b3SNathan ChancellorCLANG_FLAGS += -Werror=unknown-warning-option 588238bcbc4SMasahiro YamadaKBUILD_CFLAGS += $(CLANG_FLAGS) 589238bcbc4SMasahiro YamadaKBUILD_AFLAGS += $(CLANG_FLAGS) 5903bd98050SJoel Stanleyexport CLANG_FLAGS 591ae6b289aSChris Friesendif 592ae6b289aSChris Fries 59357fd251cSMasahiro Yamada# Include this also for config targets because some architectures need 59457fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE. 595805b2e1dSMasahiro Yamadaifdef need-compiler 59657fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler 597805b2e1dSMasahiro Yamadaendif 59857fd251cSMasahiro Yamada 5992042b548SMasahiro Yamadaifdef config-build 6001da177e4SLinus Torvalds# =========================================================================== 6011da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 6021da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 6051da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 6061da177e4SLinus Torvalds# used for 'make defconfig' 6073204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 608315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 6091da177e4SLinus Torvalds 61036de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 61131110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 61231110ebbSSam Ravnborg 61336de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 6141da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 6151da177e4SLinus Torvalds 6162042b548SMasahiro Yamadaelse #!config-build 6171da177e4SLinus Torvalds# =========================================================================== 6181da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 6191da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 6201da177e4SLinus Torvalds 6212c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 622121c2a13SMasahiro Yamada# but instead __all depend on modules 6232c1f4f12SMasahiro YamadaPHONY += all 6242c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 625121c2a13SMasahiro Yamada__all: all 6262c1f4f12SMasahiro Yamadaelse 627121c2a13SMasahiro Yamada__all: modules 6282c1f4f12SMasahiro Yamadaendif 6292c1f4f12SMasahiro Yamada 6302c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 6312c1f4f12SMasahiro Yamada# Normally, just do built-in. 6322c1f4f12SMasahiro Yamada 6332c1f4f12SMasahiro YamadaKBUILD_MODULES := 6342c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 6352c1f4f12SMasahiro Yamada 6362c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 6372c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 6384b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 6392c1f4f12SMasahiro Yamadaendif 6402c1f4f12SMasahiro Yamada 6412c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 6422c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 6432c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 6442c1f4f12SMasahiro Yamada 6456ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) 6462c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6472c1f4f12SMasahiro Yamadaendif 6482c1f4f12SMasahiro Yamada 6492c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 6502c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6512c1f4f12SMasahiro Yamadaendif 6522c1f4f12SMasahiro Yamada 6532c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 6542c1f4f12SMasahiro Yamada 6552042b548SMasahiro Yamadaifdef need-config 656d93a18f2SMasahiro Yamadainclude include/config/auto.conf 657d93a18f2SMasahiro Yamadaendif 658d93a18f2SMasahiro Yamada 6591da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 6601da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 66123febe37SMasahiro Yamadacore-y := init/ usr/ 662f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 663d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 6648b5f4eb3SMasahiro Yamadadrivers-$(CONFIG_NET) += net/ 6658b5f4eb3SMasahiro Yamadadrivers-y += virt/ 6661da177e4SLinus Torvaldslibs-y := lib/ 6671da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 6681da177e4SLinus Torvalds 669315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 670315bab4eSMasahiro Yamada# command line. 671315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 672315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 673315bab4eSMasahiro Yamadaall: vmlinux 674315bab4eSMasahiro Yamada 675315bab4eSMasahiro YamadaCFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 676315bab4eSMasahiro Yamada $(call cc-option,-fno-tree-loop-im) \ 677315bab4eSMasahiro Yamada $(call cc-disable-warning,maybe-uninitialized,) 6785aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 679315bab4eSMasahiro Yamada 680b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 681b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 682b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 683b1f4ff74SPaulo Zanoniendif 684b1f4ff74SPaulo Zanoni 685669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 686669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 687669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 688669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 689669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 690669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 691669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS 692669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS 693669e06b1SMasahiro Yamada 6943204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 695315bab4eSMasahiro Yamada 6962042b548SMasahiro Yamadaifdef need-config 6972042b548SMasahiro Yamadaifdef may-sync-config 698315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 699315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 700315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 701d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 7021da177e4SLinus Torvalds 70305850719SMasahiro Yamada$(KCONFIG_CONFIG): 70405850719SMasahiro Yamada @echo >&2 '***' 70505850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 70605850719SMasahiro Yamada @echo >&2 '***' 70705850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 70805850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 70905850719SMasahiro Yamada @echo >&2 '***' 71005850719SMasahiro Yamada @/bin/false 7111da177e4SLinus Torvalds 71261277981SUlf Magnusson# The actual configuration files used during the build are stored in 71361277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 71461277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 7159390dff6SMasahiro Yamada# 7169390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 7179390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 718f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 71923cd88c9SMasahiro Yamadaquiet_cmd_syncconfig = SYNC $@ 72023cd88c9SMasahiro Yamada cmd_syncconfig = $(MAKE) -f $(srctree)/Makefile syncconfig 72123cd88c9SMasahiro Yamada 7223044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) 72323cd88c9SMasahiro Yamada +$(call cmd,syncconfig) 7242042b548SMasahiro Yamadaelse # !may-sync-config 725d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 726d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 727d7942413SMasahiro Yamada# Use auto.conf to trigger the test 7289ee4e336SSam RavnborgPHONY += include/config/auto.conf 7299ee4e336SSam Ravnborg 7309ee4e336SSam Ravnborginclude/config/auto.conf: 731264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 7325369f550SMichal Marek echo >&2; \ 7335369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 7345369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 7355369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 7365369f550SMichal Marek echo >&2 ; \ 7379ee4e336SSam Ravnborg /bin/false) 7389ee4e336SSam Ravnborg 739d7942413SMasahiro Yamadaendif # may-sync-config 7402042b548SMasahiro Yamadaendif # need-config 7411da177e4SLinus Torvalds 742a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 743ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 744bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 745bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 7466f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 747a1c48bb1SGeert Uytterhoeven 74815f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 749a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 75015f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 75115f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3 75215f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 75315f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 7541da177e4SLinus Torvaldsendif 7551da177e4SLinus Torvalds 75669102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 75769102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 758b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 75969102311SJiri Kosina 7601873e870SAndi Kleenifdef CONFIG_READABLE_ASM 7611873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 7621873e870SAndi Kleen# reorder blocks reorders the control in the function 7631873e870SAndi Kleen# ipa clone creates specialized cloned functions 7641873e870SAndi Kleen# partial inlining inlines only parts of functions 7651873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 7661873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 7671873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 7681873e870SAndi Kleenendif 7691873e870SAndi Kleen 77008f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 771a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 77235bb5b1eSAndi Kleenendif 77335bb5b1eSAndi Kleen 774893ab004SMasahiro Yamadastackp-flags-y := -fno-stack-protector 775050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 776050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 7772a61f474SMasahiro Yamada 7782a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 779e06b8b98SSam Ravnborg 780076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 781a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 782a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier 783a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 784cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 785cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names. 786cfe17c9bSMasahiro Yamada# See modpost pattern 2 787a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge 788cfe17c9bSMasahiro Yamadaelse 789cfe17c9bSMasahiro Yamada 790e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement. 791e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and 792e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 793e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 794cfe17c9bSMasahiro Yamadaendif 795cfe17c9bSMasahiro Yamada 796885480b0SNathan Chancellor# These warnings generated too much noise in a regular build. 797885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 798885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 799885480b0SNathan Chancellor 8000a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 8011da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 802a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 8031da177e4SLinus Torvaldselse 8047e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 8057e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 8067e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 8077e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 8087e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 8097e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 810a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 8111da177e4SLinus Torvaldsendif 8127e9501fdSRabin Vincentendif 8131da177e4SLinus Torvalds 814f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern. 815f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN 816709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 817709a972eSKees Cookendif 818709a972eSKees Cook 819f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value. 820f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO 821f0fe00d4Sglider@google.com# Future support for zero initialization is still being debated, see 822f0fe00d4Sglider@google.com# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being 823f0fe00d4Sglider@google.com# renamed or dropped. 824f0fe00d4Sglider@google.comKBUILD_CFLAGS += -ftrivial-auto-var-init=zero 825f0fe00d4Sglider@google.comKBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 826f0fe00d4Sglider@google.comendif 827f0fe00d4Sglider@google.com 82839218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes 82939218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers. 83039218ff4SKees CookKBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 83139218ff4SKees Cook 832315da87cSMasahiro YamadaDEBUG_CFLAGS := 833315da87cSMasahiro Yamada 834121c5d08SMark Wielaard# Workaround for GCC versions < 5.0 835121c5d08SMark Wielaard# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801 836121c5d08SMark Wielaardifdef CONFIG_CC_IS_GCC 837315da87cSMasahiro YamadaDEBUG_CFLAGS += $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments)) 838121c5d08SMark Wielaardendif 8392062afb4SLinus Torvalds 8401da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 841695afd3dSSedat Dilek 842866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 8439d937444SMasahiro YamadaDEBUG_CFLAGS += -gsplit-dwarf 844866ced95SAndi Kleenelse 8451e88e415SMasahiro YamadaDEBUG_CFLAGS += -g 846866ced95SAndi Kleenendif 847695afd3dSSedat Dilek 848b8a90923SNick Desaulniersifneq ($(LLVM_IAS),1) 8492288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 850b8a90923SNick Desaulniersendif 851695afd3dSSedat Dilek 852a66049e2SNick Desaulniersifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT 853a66049e2SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4 85498cd6f52SNick Desaulniersdwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5 855a66049e2SNick DesaulniersDEBUG_CFLAGS += -gdwarf-$(dwarf-version-y) 856bfaf2dd3SAndi Kleenendif 8571da177e4SLinus Torvalds 858d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 8591e88e415SMasahiro YamadaDEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 860e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 861d6f4ceb7SAndi Kleenendif 862d6f4ceb7SAndi Kleen 86310e68b02SNick Desaulniersifdef CONFIG_DEBUG_INFO_COMPRESSED 86410e68b02SNick DesaulniersDEBUG_CFLAGS += -gz=zlib 8657b169944SArvind SankarKBUILD_AFLAGS += -gz=zlib 86610e68b02SNick DesaulniersKBUILD_LDFLAGS += --compress-debug-sections=zlib 86710e68b02SNick Desaulniersendif 86810e68b02SNick Desaulniers 869695afd3dSSedat Dilekendif # CONFIG_DEBUG_INFO 870695afd3dSSedat Dilek 8711e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS) 8721e88e415SMasahiro Yamadaexport DEBUG_CFLAGS 8731e88e415SMasahiro Yamada 874606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 8753b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC 87607d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 8772f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 8782f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 8792f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 8802f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 8812f4df001SVasily Gorbik endif 8822f4df001SVasily Gorbik endif 88307d04081SVasily Gorbikendif 88422c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 88522c8542dSSami Tolvanen CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 88622c8542dSSami Tolvanenendif 8873b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 8883b15cdc1SSami Tolvanen ifdef CONFIG_HAVE_C_RECORDMCOUNT 8893b15cdc1SSami Tolvanen BUILD_C_RECORDMCOUNT := y 8903b15cdc1SSami Tolvanen export BUILD_C_RECORDMCOUNT 8913b15cdc1SSami Tolvanen endif 8923b15cdc1SSami Tolvanenendif 893a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 894f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 895f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 896f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 897a2546faeSSteven Rostedt endif 898f28bc3c3SVasily Gorbikendif 899f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 900f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 901f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 90216444a8aSArnaldo Carvalho de Meloendif 90316444a8aSArnaldo Carvalho de Melo 90491341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 90591341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 90691341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 90791341d4bSSam Ravnborgendif 90891341d4bSSam Ravnborg 90990ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 910e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 911e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 91290ad4052SMasahiro Yamadaendif 91390ad4052SMasahiro Yamada 914d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK 915d08b9f0cSSami TolvanenCC_FLAGS_SCS := -fsanitize=shadow-call-stack 916d08b9f0cSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_SCS) 917d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS 918d08b9f0cSSami Tolvanenendif 919d08b9f0cSSami Tolvanen 920dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG 921dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN 9222b868952SAlexander LobakinCC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 9237f69180bSMasahiro YamadaKBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache 924dc5723b0SSami Tolvanenelse 9252b868952SAlexander LobakinCC_FLAGS_LTO := -flto 926dc5723b0SSami Tolvanenendif 927dc5723b0SSami TolvanenCC_FLAGS_LTO += -fvisibility=hidden 92822d429e7SSami Tolvanen 92922d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size 93022d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5 931dc5723b0SSami Tolvanenendif 932dc5723b0SSami Tolvanen 933dc5723b0SSami Tolvanenifdef CONFIG_LTO 9345e95325fSSami TolvanenKBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 9355e95325fSSami TolvanenKBUILD_AFLAGS += -fno-lto 936dc5723b0SSami Tolvanenexport CC_FLAGS_LTO 937dc5723b0SSami Tolvanenendif 938dc5723b0SSami Tolvanen 939cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG 940cf68fffbSSami TolvanenCC_FLAGS_CFI := -fsanitize=cfi \ 941cf68fffbSSami Tolvanen -fsanitize-cfi-cross-dso \ 942cf68fffbSSami Tolvanen -fno-sanitize-cfi-canonical-jump-tables \ 943cf68fffbSSami Tolvanen -fno-sanitize-trap=cfi \ 944cf68fffbSSami Tolvanen -fno-sanitize-blacklist 945cf68fffbSSami Tolvanen 946cf68fffbSSami Tolvanenifdef CONFIG_CFI_PERMISSIVE 947cf68fffbSSami TolvanenCC_FLAGS_CFI += -fsanitize-recover=cfi 948cf68fffbSSami Tolvanenendif 949cf68fffbSSami Tolvanen 950cf68fffbSSami Tolvanen# If LTO flags are filtered out, we must also filter out CFI. 951cf68fffbSSami TolvanenCC_FLAGS_LTO += $(CC_FLAGS_CFI) 952cf68fffbSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_CFI) 953cf68fffbSSami Tolvanenexport CC_FLAGS_CFI 954cf68fffbSSami Tolvanenendif 955cf68fffbSSami Tolvanen 95609c60546SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B 95709c60546SFeng TangKBUILD_CFLAGS += -falign-functions=32 95809c60546SFeng Tangendif 95909c60546SFeng Tang 960e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 961e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 962e8e69931SSam Ravnborg 9631da177e4SLinus Torvalds# warn about C99 declaration after statement 964a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 9651da177e4SLinus Torvalds 9660bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 9678289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 9680bb95f80SKees Cook 969070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 970fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 9711da177e4SLinus Torvalds 972217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 973217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 974217c3e01SStephen Rothwell 9755c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 9765c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) 97744720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) 9785a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 9795c45de21SLinus Torvalds 980adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 981adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 982adc71920SLinus Torvalds 98378a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 98478a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) 98578a5255fSLinus Torvalds 986fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 9878b42cf2fSMasahiro YamadaKBUILD_CFLAGS += -fno-strict-overflow 988d0115552SLinus Torvalds 9893ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 9907d4eb0d8SMasahiro YamadaKBUILD_CFLAGS += -fno-stack-check 9913ce120b1SLinus Torvalds 9928f7f5c9fSAndi Kleen# conserve stack if available 9938f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 9948f7f5c9fSAndi Kleen 995fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 99687de84c9SMasahiro YamadaKBUILD_CFLAGS += -Werror=date-time 997fe7c36c7SJosh Triplett 998ea8daa7bSDaniel Wagner# enforce correct pointer usage 999ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 1000ea8daa7bSDaniel Wagner 1001c834f0e8SKees Cook# Require designated initializers for all marked structures 1002c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 1003c834f0e8SKees Cook 1004a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 1005a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 1006a73619a8SMasahiro Yamada 1007e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed 1008e0fe0bbeSMasahiro Yamadainclude-y := scripts/Makefile.extrawarn 1009e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN) += scripts/Makefile.kasan 1010e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1011e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1012e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV) += scripts/Makefile.kcov 1013e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1014e0fe0bbeSMasahiro Yamada 1015e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y)) 1016a86fe353SMasahiro Yamada 1017132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last. 1018132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel 1019132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point. 1020bf5438fcSJason Baron 10218cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 10228cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 10238cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 10248cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 102552bcc330SSam Ravnborg 1026a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1 1027a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1 102818991197SRoland McGrath 10295d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1030d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 10315d7d18f5SDavid Howellsendif 10325d7d18f5SDavid Howells 10335cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 10345cf896fbSPeter CollingbourneLDFLAGS_vmlinux += --pack-dyn-relocs=relr 10355cf896fbSPeter Collingbourneendif 10365cf896fbSPeter Collingbourne 103759612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the 103859612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script. 103959612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN 104059612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn 104159612b24SNathan Chancellorendif 104259612b24SNathan Chancellor 10437f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 10447f58b487SMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 10457f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 10467f3a59dbSMasahiro Yamada 104780591e61SLuc Van Oostenryck# make the checker run with the right architecture 104880591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 104980591e61SLuc Van Oostenryck 105014516765SLuc Van Oostenryck# insure the checker run with the right endianness 105114516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 105214516765SLuc Van Oostenryck 10531f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 10541f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 10551f2f01b1SLuc Van Oostenryck 10561da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 10571da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 10581da177e4SLinus Torvalds# set in the environment 10591da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 10601da177e4SLinus Torvalds# this default value 10611da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds# 10641da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 10651da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 10661da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 10671da177e4SLinus Torvalds 10681da177e4SLinus Torvalds# 1069f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1070f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1071f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 1072f4d4ffc0SJason Cooper# 1073f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1074f4d4ffc0SJason Cooper 1075f4d4ffc0SJason Cooper# 10761da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 10771da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 1078070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 10791da177e4SLinus Torvalds# 10801da177e4SLinus Torvalds 1081df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 10821da177e4SLinus Torvaldsexport MODLIB 10831da177e4SLinus Torvalds 1084056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 1085056d28d1SRolf Eike Beer 108633a57ce0SJiri Olsahas_libelf = $(call try-run,\ 1087f634ca65SNathan Chancellor echo "int main() {}" | $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 108833a57ce0SJiri Olsa 108933a57ce0SJiri Olsaifdef CONFIG_STACK_VALIDATION 10909f0c18aeSJosh Poimboeuf ifeq ($(has_libelf),1) 10919f0c18aeSJosh Poimboeuf objtool_target := tools/objtool FORCE 10929f0c18aeSJosh Poimboeuf else 10939f0c18aeSJosh Poimboeuf SKIP_STACK_VALIDATION := 1 10949f0c18aeSJosh Poimboeuf export SKIP_STACK_VALIDATION 10959f0c18aeSJosh Poimboeuf endif 10969f0c18aeSJosh Poimboeufendif 10979f0c18aeSJosh Poimboeuf 109850d3a3f8SJiri OlsaPHONY += resolve_btfids_clean 109950d3a3f8SJiri Olsa 11000e1aa629SJiri Olsaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 11010e1aa629SJiri Olsa 11020e1aa629SJiri Olsa# tools/bpf/resolve_btfids directory might not exist 11030e1aa629SJiri Olsa# in output directory, skip its clean in that case 110450d3a3f8SJiri Olsaresolve_btfids_clean: 11050e1aa629SJiri Olsaifneq ($(wildcard $(resolve_btfids_O)),) 11060e1aa629SJiri Olsa $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 11070e1aa629SJiri Olsaendif 110850d3a3f8SJiri Olsa 1109017dab34SJiri Olsaifdef CONFIG_BPF 111033a57ce0SJiri Olsaifdef CONFIG_DEBUG_INFO_BTF 111133a57ce0SJiri Olsa ifeq ($(has_libelf),1) 111233a57ce0SJiri Olsa resolve_btfids_target := tools/bpf/resolve_btfids FORCE 111333a57ce0SJiri Olsa else 111433a57ce0SJiri Olsa ERROR_RESOLVE_BTFIDS := 1 111533a57ce0SJiri Olsa endif 1116017dab34SJiri Olsaendif # CONFIG_DEBUG_INFO_BTF 1117017dab34SJiri Olsaendif # CONFIG_BPF 111833a57ce0SJiri Olsa 1119e00d8880SMasahiro YamadaPHONY += prepare0 1120e2a666d5SRusty Russell 1121ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 11227f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order 11237f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps 112447801c97SMasahiro Yamada 11251da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1126cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 11271da177e4SLinus Torvalds 112823febe37SMasahiro Yamadavmlinux-dirs := $(patsubst %/,%,$(filter %/, \ 11291da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 113095fb6317SMasahiro Yamada $(libs-y) $(libs-m))) 11311da177e4SLinus Torvalds 11321eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 113323febe37SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(core-) \ 113495fb6317SMasahiro Yamada $(drivers-) $(libs-)))) 11351da177e4SLinus Torvalds 1136b2c88554SMasahiro Yamadasubdir-modorder := $(addsuffix modules.order,$(filter %/, \ 1137b2c88554SMasahiro Yamada $(core-y) $(core-m) $(libs-y) $(libs-m) \ 1138b2c88554SMasahiro Yamada $(drivers-y) $(drivers-m))) 11391da177e4SLinus Torvalds 1140c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 114176cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1142c99f3918SMasahiro Yamada 11431f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1144f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) 1145f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) 1146f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES 1147f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1148f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1149f0d50ca0SMasahiro Yamadaelse 1150f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1151f0d50ca0SMasahiro Yamadaendif 1152f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) 1153f0d50ca0SMasahiro Yamada 1154f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS 115595698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 115685f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1157233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 11581da177e4SLinus Torvalds 1159d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 11601da177e4SLinus Torvalds 11613fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 11623fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 11632441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 11641f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 11651f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 11661f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 11671f50b80aSMasahiro YamadaKBUILD_MODULES := 1 1168fb2d99beSMasahiro Yamada 1169fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order 1170fb2d99beSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1171fb2d99beSMasahiro Yamada "$(MAKE) -f $(srctree)/Makefile vmlinux" 11721f50b80aSMasahiro Yamadaendif 11731f50b80aSMasahiro Yamada 117407a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 117507a422bbSMasahiro Yamada 117688694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 117788694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 117888694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 117988694cffSQuentin Perret 118007a422bbSMasahiro Yamada$(autoksyms_h): 118188694cffSQuentin Perret $(call cmd,autoksyms_h) 118223121ca2SNicolas Pitre 1183fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1184fbe6e37dSNicholas Piggin 1185fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1186fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 11873ec8a5b3SMasahiro Yamada $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ 1188fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 11892441e78bSNicolas Pitre 11903fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 11910b956e20SRasmus Villemoes +$(call if_changed_dep,link-vmlinux) 1192741f98feSSam Ravnborg 1193392885eeSMasahiro Yamadatargets := vmlinux 1194392885eeSMasahiro Yamada 11951da177e4SLinus Torvalds# The actual objects are generated when descending, 11961da177e4SLinus Torvalds# make sure no implicit rule kicks in 1197b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ; 11981da177e4SLinus Torvalds 1199ba97df45SMasahiro Yamadafilechk_kernel.release = \ 12000d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 12010d0e7718SMichal Marek 120283a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 120324512795SMasahiro Yamadainclude/config/kernel.release: FORCE 12040d0e7718SMichal Marek $(call filechk,kernel.release) 1205cb58455cSSam Ravnborg 1206d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1207d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1208d8821622SMasahiro Yamada# in parallel 1209d8821622SMasahiro YamadaPHONY += scripts 121060df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1211d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1212cb58455cSSam Ravnborg 12131da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 12145bb78269SSam Ravnborg# or the modules are listed in "prepare". 12155bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 12165bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 12175bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 12181da177e4SLinus Torvalds 1219a5139fb3SMasahiro YamadaPHONY += prepare archprepare 12205bb78269SSam Ravnborg 122136de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 12223044dd05SMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 12231476fee5SMasahiro Yamada include/generated/autoconf.h remove-stale-files 12245bb78269SSam Ravnborg 122565bba042SMasahiro Yamadaprepare0: archprepare 122660df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 12278d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 122886feeaa8SSam Ravnborg 12291da177e4SLinus Torvalds# All the preparing.. 123033a57ce0SJiri Olsaprepare: prepare0 prepare-objtool prepare-resolve_btfids 1231b9ab5ebbSJosh Poimboeuf 12321476fee5SMasahiro YamadaPHONY += remove-stale-files 12331476fee5SMasahiro Yamadaremove-stale-files: 12341476fee5SMasahiro Yamada $(Q)$(srctree)/scripts/remove-stale-files 12351476fee5SMasahiro Yamada 12362c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 12377d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 12387d0e5c20SMasahiro Yamada 12392c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 12402c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1241037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1242037fc336SMasahiro Yamada generic=include/asm-generic 12432c1f4f12SMasahiro Yamadauapi-asm-generic: 1244037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1245037fc336SMasahiro Yamada generic=include/uapi/asm-generic 12462c1f4f12SMasahiro Yamada 124733a57ce0SJiri OlsaPHONY += prepare-objtool prepare-resolve_btfids 12483b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 1249ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1) 125022c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 125122c8542dSSami Tolvanen @echo "error: Cannot generate __mcount_loc for CONFIG_DYNAMIC_FTRACE=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 125222c8542dSSami Tolvanen @false 125322c8542dSSami Tolvanenendif 1254ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC 1255ef7cfd00SMasahiro Yamada @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1256ef7cfd00SMasahiro Yamada @false 1257ef7cfd00SMasahiro Yamadaelse 1258ef7cfd00SMasahiro Yamada @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1259ef7cfd00SMasahiro Yamadaendif 1260ef7cfd00SMasahiro Yamadaendif 12611da177e4SLinus Torvalds 126233a57ce0SJiri Olsaprepare-resolve_btfids: $(resolve_btfids_target) 126333a57ce0SJiri Olsaifeq ($(ERROR_RESOLVE_BTFIDS),1) 126433a57ce0SJiri Olsa @echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 126533a57ce0SJiri Olsa @false 126633a57ce0SJiri Olsaendif 12671da177e4SLinus Torvalds# Generate some files 12681da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12691da177e4SLinus Torvalds 12701da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 12711da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 12721da177e4SLinus Torvalds 12731da177e4SLinus Torvaldsuts_len := 64 127463104eecSSam Ravnborgdefine filechk_utsrelease.h 12751da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 12761da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 12771da177e4SLinus Torvalds exit 1; \ 12781da177e4SLinus Torvalds fi; \ 1279ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 12801da177e4SLinus Torvaldsendef 12811da177e4SLinus Torvalds 128263104eecSSam Ravnborgdefine filechk_version.h 12839b82f13eSSasha Levin if [ $(SUBLEVEL) -gt 255 ]; then \ 1284ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 1285207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 12869b82f13eSSasha Levin else \ 12879b82f13eSSasha Levin echo \#define LINUX_VERSION_CODE $(shell \ 1288207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 12899b82f13eSSasha Levin fi; \ 12909b82f13eSSasha Levin echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 129188a68672SSasha Levin ((c) > 255 ? 255 : (c)))'; \ 129288a68672SSasha Levin echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 129388a68672SSasha Levin echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 129488a68672SSasha Levin echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 129563104eecSSam Ravnborgendef 129663104eecSSam Ravnborg 1297207da4c8SMasahiro Yamada$(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0) 1298207da4c8SMasahiro Yamada$(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0) 129943fee2b2SMasahiro Yamada$(version_h): FORCE 13001da177e4SLinus Torvalds $(call filechk,version.h) 13011da177e4SLinus Torvalds 1302273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 130363104eecSSam Ravnborg $(call filechk,utsrelease.h) 130463104eecSSam Ravnborg 1305179efcb4SVegard NossumPHONY += headerdep 1306179efcb4SVegard Nossumheaderdep: 13079663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 13089663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1309179efcb4SVegard Nossum 13101da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13118d730cfbSDavid Woodhouse# Kernel headers 13128d730cfbSDavid Woodhouse 1313e6883b18SSam Ravnborg#Default location for installed headers 1314e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1315e6883b18SSam Ravnborg 131659b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 131759b2bd05SMasahiro Yamada cmd_headers_install = \ 131859b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 131959b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 132059b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 13216d716275SDavid Woodhouse 13228d730cfbSDavid WoodhousePHONY += headers_install 132359b2bd05SMasahiro Yamadaheaders_install: headers 132459b2bd05SMasahiro Yamada $(call cmd,headers_install) 13254f193362SPaul Smith 13261da177e4SLinus TorvaldsPHONY += archheaders archscripts 13271da177e4SLinus Torvalds 1328a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 13291da177e4SLinus Torvalds 133059b2bd05SMasahiro YamadaPHONY += headers 133159b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 13329d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 13332fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1334d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1335d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 13361f85712eSMike Frysinger 13377ecaf069SMasahiro Yamada# Deprecated. It is no-op now. 133868475359SDavid WoodhousePHONY += headers_check 13397ecaf069SMasahiro Yamadaheaders_check: 1340609bbb4dSMasahiro Yamada @echo >&2 "=================== WARNING ===================" 1341609bbb4dSMasahiro Yamada @echo >&2 "Since Linux 5.5, 'make headers_check' is no-op," 1342609bbb4dSMasahiro Yamada @echo >&2 "and will be removed after Linux 5.15 release." 1343609bbb4dSMasahiro Yamada @echo >&2 "Please remove headers_check from your scripts." 1344609bbb4dSMasahiro Yamada @echo >&2 "===============================================" 134568475359SDavid Woodhouse 1346e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 134759b2bd05SMasahiro Yamadaprepare: headers 1348e949f4c2SMasahiro Yamadaendif 13491da177e4SLinus Torvalds 1350bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1351bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1352bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1353bdd7714bSMasahiro Yamada 13541da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13555a5da78bSShuah Khan# Kernel selftest 13565a5da78bSShuah Khan 13575a5da78bSShuah KhanPHONY += kselftest 13585a5da78bSShuah Khankselftest: 13592bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 13605a5da78bSShuah Khan 136117eac6c2SShuah Khankselftest-%: FORCE 136217eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1363dcb825a9SWang Long 13643d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 13653d6dee7aSBamvor Jian Zhangkselftest-merge: 13663d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 13676d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 13686d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 13693e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 13703d6dee7aSBamvor Jian Zhang 13715a5da78bSShuah Khan# --------------------------------------------------------------------------- 137237c8a5faSRob Herring# Devicetree files 137337c8a5faSRob Herring 137437c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 137537c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 137637c8a5faSRob Herringendif 137737c8a5faSRob Herring 137837c8a5faSRob Herringifneq ($(dtstree),) 137937c8a5faSRob Herring 1380a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc 138137c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 138237c8a5faSRob Herring 1383ce88c9c7SViresh Kumar%.dtbo: include/config/kernel.release scripts_dtc 1384ce88c9c7SViresh Kumar $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1385ce88c9c7SViresh Kumar 1386c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check 1387b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc 138837c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 138937c8a5faSRob Herring 1390b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1391e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1392b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1393b5154bf6SMasahiro Yamadaendif 1394b5154bf6SMasahiro Yamada 1395b5154bf6SMasahiro Yamadadtbs_check: dtbs 13964f0e3a57SRob Herring 139737c8a5faSRob Herringdtbs_install: 13982431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 139937c8a5faSRob Herring 140037c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 140137c8a5faSRob Herringall: dtbs 140237c8a5faSRob Herringendif 140337c8a5faSRob Herring 140437c8a5faSRob Herringendif 140537c8a5faSRob Herring 140637c8a5faSRob HerringPHONY += scripts_dtc 140737c8a5faSRob Herringscripts_dtc: scripts_basic 140837c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 140937c8a5faSRob Herring 1410e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1411e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1412e10c4321SMasahiro Yamadaendif 1413e10c4321SMasahiro Yamada 1414c473a8d0SMasahiro YamadaPHONY += dt_binding_check 14154f0e3a57SRob Herringdt_binding_check: scripts_dtc 14164f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 14174f0e3a57SRob Herring 141837c8a5faSRob Herring# --------------------------------------------------------------------------- 14191da177e4SLinus Torvalds# Modules 14201da177e4SLinus Torvalds 14211da177e4SLinus Torvaldsifdef CONFIG_MODULES 14221da177e4SLinus Torvalds 14231da177e4SLinus Torvalds# By default, build modules as well 14241da177e4SLinus Torvalds 142573d1393eSMichal Marekall: modules 14261da177e4SLinus Torvalds 14274b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider 14284b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to 14294b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them. 14304b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS 14314b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 1 14324b50c8c4SMasahiro Yamadaendif 14334b50c8c4SMasahiro Yamada 14341da177e4SLinus Torvalds# Build modules 1435551559e1STejun Heo# 1436551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1437551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1438551559e1STejun Heo# using awk while concatenating to the final file. 14391da177e4SLinus Torvalds 14404f193362SPaul SmithPHONY += modules 1441596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare 14421da177e4SLinus Torvalds 1443b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ 1444b2c88554SMasahiro Yamada 1445b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE 1446b2c88554SMasahiro Yamada $(call if_changed,modules_order) 1447b2c88554SMasahiro Yamada 1448b2c88554SMasahiro Yamadatargets += modules.order 1449a6c36632SMichal Marek 14501da177e4SLinus Torvalds# Target to prepare building external modules 14514f193362SPaul SmithPHONY += modules_prepare 1452059bc9fcSMasahiro Yamadamodules_prepare: prepare 1453596b0474SMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/module.lds 14541da177e4SLinus Torvalds 1455961ab4a3SMasahiro Yamadaexport modules_sign_only := 14561da177e4SLinus Torvalds 1457961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y) 1458961ab4a3SMasahiro YamadaPHONY += modules_sign 1459961ab4a3SMasahiro Yamadamodules_sign: modules_install 1460961ab4a3SMasahiro Yamada @: 1461961ab4a3SMasahiro Yamada 1462961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install. 1463961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 1464961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),) 1465961ab4a3SMasahiro Yamadamodules_sign_only := y 1466961ab4a3SMasahiro Yamadaendif 1467961ab4a3SMasahiro Yamadaendif 1468961ab4a3SMasahiro Yamada 1469961ab4a3SMasahiro Yamadamodinst_pre := 1470961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),) 1471961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre 1472961ab4a3SMasahiro Yamadaendif 1473961ab4a3SMasahiro Yamada 1474961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre) 14753e3005dfSMasahiro YamadaPHONY += __modinst_pre 14763e3005dfSMasahiro Yamada__modinst_pre: 14771da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 14781da177e4SLinus Torvalds @rm -f $(MODLIB)/source 14791da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 14808e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 14811da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 14821da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 14837e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 14841da177e4SLinus Torvalds fi 14851bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 14862c6d9636SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 14872c6d9636SMasahiro Yamada @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 14881da177e4SLinus Torvalds 14891da177e4SLinus Torvaldsendif # CONFIG_MODULES 14901da177e4SLinus Torvalds 14911da177e4SLinus Torvalds### 14921da177e4SLinus Torvalds# Cleaning is done on three levels. 14931da177e4SLinus Torvalds# make clean Delete most generated files 14941da177e4SLinus Torvalds# Leave enough to build external modules 14951da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 14961da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 14971da177e4SLinus Torvalds 14981da177e4SLinus Torvalds# Directories & files removed with 'make clean' 149969bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ 15003d32285fSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps \ 15014c7858b9SMasahiro Yamada compile_commands.json .thinlto-cache 15021da177e4SLinus Torvalds 15031da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 15040663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 150546a63d4bSMasahiro Yamada arch/$(SRCARCH)/include/generated .tmp_objdiff \ 15060663c68cSMasahiro Yamada debian snap tar-install \ 15070663c68cSMasahiro Yamada .config .config.old .version \ 150846457133SMasahiro Yamada Module.symvers \ 1509fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1510fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 151146a63d4bSMasahiro Yamada signing_key.x509.signer vmlinux-gdb.py \ 151246a63d4bSMasahiro Yamada *.spec 15131da177e4SLinus Torvalds 151446457133SMasahiro Yamada# Directories & files removed with 'make distclean' 15154c7858b9SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 151646457133SMasahiro Yamada 15171da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 15181da177e4SLinus Torvalds# 15191da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 15201da177e4SLinus Torvalds 152176cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 15221da177e4SLinus Torvalds 1523bd1ee804SPawel Mollvmlinuxclean: 1524bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1525fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1526bd1ee804SPawel Moll 152750d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean 15281da177e4SLinus Torvalds 15291da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 15301da177e4SLinus Torvalds# 15311da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1532cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 15331da177e4SLinus Torvalds 1534b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 15351da177e4SLinus Torvalds$(mrproper-dirs): 15361da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 15371da177e4SLinus Torvalds 1538b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 15391da177e4SLinus Torvalds $(call cmd,rmfiles) 15401da177e4SLinus Torvalds 15411da177e4SLinus Torvalds# distclean 15421da177e4SLinus Torvalds# 154346457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 154446457133SMasahiro Yamada 15454f193362SPaul SmithPHONY += distclean 15461da177e4SLinus Torvalds 15471da177e4SLinus Torvaldsdistclean: mrproper 154846457133SMasahiro Yamada $(call cmd,rmfiles) 1549*19c8d912SMasahiro Yamada @find . $(RCS_FIND_IGNORE) \ 15501da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1551f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1552f78271dfSMasahiro Yamada -o -name 'core' \) \ 15531da177e4SLinus Torvalds -type f -print | xargs rm -f 15541da177e4SLinus Torvalds 15551da177e4SLinus Torvalds 15561da177e4SLinus Torvalds# Packaging of the kernel to various formats 15571da177e4SLinus Torvalds# --------------------------------------------------------------------------- 15581da177e4SLinus Torvalds 1559bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1560000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1561031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1562000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 15631da177e4SLinus Torvalds 15641da177e4SLinus Torvalds# Brief documentation of the typical targets used 15651da177e4SLinus Torvalds# --------------------------------------------------------------------------- 15661da177e4SLinus Torvalds 15675dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1568a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 15695dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 15705dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 15711da177e4SLinus Torvalds 1572fe69b420SMasahiro YamadaPHONY += help 15731da177e4SLinus Torvaldshelp: 15741da177e4SLinus Torvalds @echo 'Cleaning targets:' 15755ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 15765cc8d246SJesper Juhl @echo ' enough build support to build external modules' 15775ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 15785cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 15791da177e4SLinus Torvalds @echo '' 15801da177e4SLinus Torvalds @echo 'Configuration targets:' 15811da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 15821da177e4SLinus Torvalds @echo '' 15831da177e4SLinus Torvalds @echo 'Other generic targets:' 15841da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 15851da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 15861da177e4SLinus Torvalds @echo '* modules - Build all modules' 15879cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 15881da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 158940ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1590433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1591433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 159262718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 159362718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1594155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1595c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 15961da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 15971da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1598f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 15993f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 16003f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 16013f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 16022fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 160359df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 16042fb9b1bdSSam Ravnborg echo '' 160531b8cc80SRandy Dunlap @echo 'Static analysers:' 16061da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1607aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1608ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1609295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 161074425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 16117f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 16126ad7cbc0SNathan Huckleberry @echo ' clang-analyzer - Check with clang static analyzer' 16136ad7cbc0SNathan Huckleberry @echo ' clang-tidy - Check with clang-tidy' 161474425eeeSNicolas Palix @echo '' 1615eb8305aeSMatthias Maennich @echo 'Tools:' 1616eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1617eb8305aeSMatthias Maennich @echo '' 161831b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1619e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 16205a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 16215a5da78bSShuah Khan @echo ' running kselftest on it' 1622e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1623e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1624e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1625dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1626e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1627e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 16285a5da78bSShuah Khan @echo '' 162937c8a5faSRob Herring @$(if $(dtstree), \ 163037c8a5faSRob Herring echo 'Devicetree:'; \ 163137c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 163237c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 16337aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 16347aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 163537c8a5faSRob Herring echo '') 163637c8a5faSRob Herring 163731b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 163831b8cc80SRandy Dunlap @echo ' use "make tools/help"' 163931b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 164031b8cc80SRandy Dunlap @echo '' 16411da177e4SLinus Torvalds @echo 'Kernel packaging:' 1642000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 16431da177e4SLinus Torvalds @echo '' 16441da177e4SLinus Torvalds @echo 'Documentation targets:' 1645cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 16461da177e4SLinus Torvalds @echo '' 164701dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 16481da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 164901dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 16501da177e4SLinus Torvalds @echo '' 16511da177e4SLinus Torvalds @$(if $(boards), \ 16521da177e4SLinus Torvalds $(foreach b, $(boards), \ 16534234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 16541da177e4SLinus Torvalds echo '') 16555dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 16565dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 16575dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 16585dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 16595dffbe81SSegher Boessenkool echo '') 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 166245d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 16631da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1664a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1665a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1666701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1667af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1668e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 166928bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 167028bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 167128bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1672a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 16731da177e4SLinus Torvalds @echo '' 16741da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 16751da177e4SLinus Torvalds @echo 'For further info see the ./README file' 16761da177e4SLinus Torvalds 16771da177e4SLinus Torvalds 16785dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 16795dffbe81SSegher Boessenkool 16805dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 16815dffbe81SSegher Boessenkool 1682fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 16835dffbe81SSegher Boessenkool 16845dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 16855dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 16865dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 16875dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 16885dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 16895dffbe81SSegher Boessenkool echo '') 16905dffbe81SSegher Boessenkool 16915dffbe81SSegher Boessenkool 16921da177e4SLinus Torvalds# Documentation targets 16931da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1694e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1695e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 169622cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1697bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1698cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 16991da177e4SLinus Torvalds 170067274c08SMasahiro Yamada# Misc 170167274c08SMasahiro Yamada# --------------------------------------------------------------------------- 170267274c08SMasahiro Yamada 170367274c08SMasahiro YamadaPHONY += scripts_gdb 17047a739ce5SMasahiro Yamadascripts_gdb: prepare0 17051e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 17068d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 170767274c08SMasahiro Yamada 170867274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 170967274c08SMasahiro Yamadaall: scripts_gdb 171067274c08SMasahiro Yamadaendif 171167274c08SMasahiro Yamada 17121da177e4SLinus Torvaldselse # KBUILD_EXTMOD 17131da177e4SLinus Torvalds 17141da177e4SLinus Torvalds### 17151da177e4SLinus Torvalds# External module support. 17161da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 17171da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 17181da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 17191da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 17201da177e4SLinus Torvalds# be used. 17211da177e4SLinus Torvalds# 17221da177e4SLinus Torvalds# The following are the only valid targets when building external 17231da177e4SLinus Torvalds# modules. 17241da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 17251da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 17261da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 17271da177e4SLinus Torvalds# make M=dir modules_install 1728070b98bfSSam Ravnborg# Install the modules built in the module directory 17291da177e4SLinus Torvalds# Assumes install directory is already created 17301da177e4SLinus Torvalds 17316212804fSMasahiro Yamada# We are always building only modules. 17326212804fSMasahiro YamadaKBUILD_BUILTIN := 17331da177e4SLinus TorvaldsKBUILD_MODULES := 1 17341da177e4SLinus Torvalds 1735c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 17363d32285fSMasahiro Yamada$(MODORDER): descend 17373d32285fSMasahiro Yamada @: 17383d32285fSMasahiro Yamada 17397f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json 17403d32285fSMasahiro YamadaPHONY += compile_commands.json 17413d32285fSMasahiro Yamada 174276cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 17433d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ 1744dc5723b0SSami Tolvanen $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache 17451da177e4SLinus Torvalds 1746fe69b420SMasahiro YamadaPHONY += help 17471da177e4SLinus Torvaldshelp: 17481da177e4SLinus Torvalds @echo ' Building external modules.' 17491da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 17501da177e4SLinus Torvalds @echo '' 17511da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 17521da177e4SLinus Torvalds @echo ' modules_install - install the module' 17531da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 17541da177e4SLinus Torvalds @echo '' 175506300b21SSam Ravnborg 1756596b0474SMasahiro Yamada# no-op for external module builds 1757596b0474SMasahiro YamadaPHONY += prepare modules_prepare 1758596b0474SMasahiro Yamada 17591da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 17601da177e4SLinus Torvalds 17613e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 17623e3005dfSMasahiro Yamada# Modules 17633e3005dfSMasahiro Yamada 17643e3005dfSMasahiro YamadaPHONY += modules modules_install 17653e3005dfSMasahiro Yamada 17663e3005dfSMasahiro Yamadaifdef CONFIG_MODULES 17673e3005dfSMasahiro Yamada 17681a998be6SMasahiro Yamadamodules: modules_check 17693e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 17703e3005dfSMasahiro Yamada 17711a998be6SMasahiro YamadaPHONY += modules_check 17721a998be6SMasahiro Yamadamodules_check: $(MODORDER) 17731a998be6SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 17741a998be6SMasahiro Yamada 17753ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD $(MODLIB) 17763e3005dfSMasahiro Yamada cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 17773e3005dfSMasahiro Yamada $(KERNELRELEASE) 17783e3005dfSMasahiro Yamada 17793e3005dfSMasahiro Yamadamodules_install: 17803e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 17813e3005dfSMasahiro Yamada $(call cmd,depmod) 17823e3005dfSMasahiro Yamada 17833e3005dfSMasahiro Yamadaelse # CONFIG_MODULES 17843e3005dfSMasahiro Yamada 17853e3005dfSMasahiro Yamada# Modules not configured 17863e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 17873e3005dfSMasahiro Yamada 17883e3005dfSMasahiro Yamadamodules modules_install: 17893e3005dfSMasahiro Yamada @echo >&2 '***' 17903e3005dfSMasahiro Yamada @echo >&2 '*** The present kernel configuration has modules disabled.' 17913e3005dfSMasahiro Yamada @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' 17923e3005dfSMasahiro Yamada @echo >&2 '*** to enable CONFIG_MODULES.' 17933e3005dfSMasahiro Yamada @echo >&2 '***' 17943e3005dfSMasahiro Yamada @exit 1 17953e3005dfSMasahiro Yamada 17963e3005dfSMasahiro Yamadaendif # CONFIG_MODULES 17973e3005dfSMasahiro 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))) 1814b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1815b1fbfcb4SMasahiro Yamada 1816b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost 1817b1fbfcb4SMasahiro Yamada @: 1818b1fbfcb4SMasahiro Yamada$(single-no-ko): descend 1819b1fbfcb4SMasahiro Yamada @: 1820b1fbfcb4SMasahiro Yamada 1821b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1822b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 1823b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1824b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp 1825b1fbfcb4SMasahiro Yamadaendif 1826b1fbfcb4SMasahiro Yamada 1827b1fbfcb4SMasahiro YamadaPHONY += single_modpost 1828596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare 18297f69180bSMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER) 1830b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1831b1fbfcb4SMasahiro Yamada 1832b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1 1833b1fbfcb4SMasahiro Yamada 18347f69180bSMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko)) 1835b1fbfcb4SMasahiro Yamada 1836b1fbfcb4SMasahiro Yamada# trim unrelated directories 1837b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \ 1838b1fbfcb4SMasahiro Yamada $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1839b1fbfcb4SMasahiro Yamada 1840b1fbfcb4SMasahiro Yamadaendif 1841b1fbfcb4SMasahiro Yamada 1842b480fec9SMasahiro Yamadaifndef CONFIG_MODULES 1843b480fec9SMasahiro YamadaKBUILD_MODULES := 1844b480fec9SMasahiro Yamadaendif 1845b480fec9SMasahiro Yamada 1846c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1847c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1848c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1849c99f3918SMasahiro Yamada# make menuconfig etc. 1850c99f3918SMasahiro Yamada# Error messages still appears in the original language 1851c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 1852c99f3918SMasahiro Yamadadescend: $(build-dirs) 1853c99f3918SMasahiro Yamada$(build-dirs): prepare 1854b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ \ 185520b1be59SMasahiro Yamada single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ 1856b1fbfcb4SMasahiro Yamada need-builtin=1 need-modorder=1 1857c99f3918SMasahiro Yamada 185876cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 185976cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 186076cd306dSMasahiro Yamada$(clean-dirs): 186176cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 186276cd306dSMasahiro Yamada 186388d7be03SMichal Marekclean: $(clean-dirs) 186488d7be03SMichal Marek $(call cmd,rmfiles) 186543f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1866ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 18674f0e3a57SRob Herring -o -name '*.ko.*' \ 1868ce88c9c7SViresh Kumar -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1869ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 1870bbc55bdeSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 187188d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 18729a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 18734fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 187488d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 18758b41fc44SMasahiro Yamada -o -name '.tmp_*.o.*' \ 18766b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1877433db3e2SVinÃcius Tinti -o -name '*.ll' \ 187838e89184SSami Tolvanen -o -name '*.gcno' \ 187938e89184SSami Tolvanen -o -name '*.*.symversions' \) -type f -print | xargs rm -f 188088d7be03SMichal Marek 18811da177e4SLinus Torvalds# Generate tags for editors 18821da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1883a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1884858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 18851da177e4SLinus Torvalds 1886f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 18871da177e4SLinus Torvalds $(call cmd,tags) 18881da177e4SLinus Torvalds 1889eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1890eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1891eb8305aeSMatthias Maennich 1892eb8305aeSMatthias MaennichPHONY += nsdeps 1893bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1894eb8305aeSMatthias Maennichnsdeps: modules 1895bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1896eb8305aeSMatthias Maennich 18973d32285fSMasahiro Yamada# Clang Tooling 18983d32285fSMasahiro Yamada# --------------------------------------------------------------------------- 18993d32285fSMasahiro Yamada 19003d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN $@ 19013d32285fSMasahiro Yamada cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 19023d32285fSMasahiro Yamada 19037f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ 19043d32285fSMasahiro Yamada $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ 19053d32285fSMasahiro Yamada $(if $(CONFIG_MODULES), $(MODORDER)) FORCE 19063d32285fSMasahiro Yamada $(call if_changed,gen_compile_commands) 19073d32285fSMasahiro Yamada 19087f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json 19093d32285fSMasahiro Yamada 19106ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer 19116ad7cbc0SNathan Huckleberry 19126ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG 19136ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK $< 19146ad7cbc0SNathan Huckleberry cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 19156ad7cbc0SNathan Huckleberry 19167f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json 19176ad7cbc0SNathan Huckleberry $(call cmd,clang_tools) 19186ad7cbc0SNathan Huckleberryelse 19196ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer: 19206ad7cbc0SNathan Huckleberry @echo "$@ requires CC=clang" >&2 19216ad7cbc0SNathan Huckleberry @false 19226ad7cbc0SNathan Huckleberryendif 19236ad7cbc0SNathan Huckleberry 19241da177e4SLinus Torvalds# Scripts to check various things for consistency 19251da177e4SLinus Torvalds# --------------------------------------------------------------------------- 19261da177e4SLinus Torvalds 19277dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report 1928279f3dd3SPeter Foley 19291da177e4SLinus Torvaldsincludecheck: 1930436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 19311da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 193280007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 19331da177e4SLinus Torvalds 19341da177e4SLinus Torvaldsversioncheck: 19352ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 19361da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 193780007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 19381da177e4SLinus Torvalds 193974425eeeSNicolas Palixcoccicheck: 1940858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 194174425eeeSNicolas Palix 1942295ac051SAdrian Bunkexport_report: 1943295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1944295ac051SAdrian Bunk 1945c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1946e3ccf6e3SJeff Dike 1947011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1948011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1949011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1950011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1951011e3a9aSJeff Dikeifeq ($(ARCH), um) 1952011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1953011e3a9aSJeff Dikeelse 1954011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1955011e3a9aSJeff Dikeendif 19561da177e4SLinus Torvaldscheckstack: 19571da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 195875dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 19591da177e4SLinus Torvalds 19607b8ea53dSAmerigo Wangkernelrelease: 19617b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 196201ab1788SAmerigo Wang 1963cb58455cSSam Ravnborgkernelversion: 19642244cbd8SSam Ravnborg @echo $(KERNELVERSION) 19651da177e4SLinus Torvalds 1966c398ff00SMike Marciniszynimage_name: 1967c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1968c398ff00SMike Marciniszyn 1969ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1970f47a23ceSMasahiro Yamada 1971f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_) 1972f47a23ceSMasahiro Yamadatools_silent=s 1973f47a23ceSMasahiro Yamadaendif 1974f47a23ceSMasahiro Yamada 1975ea01fa9fSBorislav Petkovtools/: FORCE 1976bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 197775dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1978ea01fa9fSBorislav Petkov 1979ea01fa9fSBorislav Petkovtools/%: FORCE 1980bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 198175dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1982ea01fa9fSBorislav Petkov 19831da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 19840663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 19851da177e4SLinus Torvalds 1986392885eeSMasahiro Yamada# read saved command lines for existing targets 1987392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 19881da177e4SLinus Torvalds 1989b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 19901da177e4SLinus Torvalds 199146b7c492SSZ Lin (林上智)endif # config-build 19922042b548SMasahiro Yamadaendif # mixed-build 1993688931a5SMasahiro Yamadaendif # need-sub-make 19941da177e4SLinus Torvalds 19954f193362SPaul SmithPHONY += FORCE 19961da177e4SLinus TorvaldsFORCE: 19974f193362SPaul Smith 1998bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1999fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 20004f193362SPaul Smith.PHONY: $(PHONY) 2001