1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2568035b0SLinus TorvaldsVERSION = 6 3568035b0SLinus TorvaldsPATCHLEVEL = 0 455922c9dSLinus TorvaldsSUBLEVEL = 0 5f76349cfSLinus TorvaldsEXTRAVERSION = -rc7 6568035b0SLinus TorvaldsNAME = Hurr durr I'ma ninja sloth 71da177e4SLinus Torvalds 81da177e4SLinus Torvalds# *DOCUMENTATION* 91da177e4SLinus Torvalds# To see a list of typical targets execute "make help" 101da177e4SLinus Torvalds# More info can be located in ./README 111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not 121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file. 131da177e4SLinus Torvalds 14121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \ 15121c2a13SMasahiro Yamada $(error targets prefixed with '__' are only for internal use)) 16121c2a13SMasahiro Yamada 17ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 18121c2a13SMasahiro YamadaPHONY := __all 19121c2a13SMasahiro Yamada__all: 20ba634eceSMasahiro Yamada 211da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 221da177e4SLinus Torvalds# to get the ordering right. 231da177e4SLinus Torvalds# 241da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 251da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 261da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 27f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 281da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 291da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 301da177e4SLinus Torvalds# is now up to date. 311da177e4SLinus Torvalds# 321da177e4SLinus Torvalds# The only cases where we need to modify files which have global 331da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 341da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 351da177e4SLinus Torvalds# prepare rule. 361da177e4SLinus Torvalds 37221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 383812b8c5SMasahiro Yamada 393812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 403812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 413812b8c5SMasahiro YamadaMAKEFLAGS += -rR 423812b8c5SMasahiro Yamada 433812b8c5SMasahiro Yamada# Avoid funny character set dependencies 443812b8c5SMasahiro Yamadaunexport LC_ALL 453812b8c5SMasahiro YamadaLC_COLLATE=C 463812b8c5SMasahiro YamadaLC_NUMERIC=C 473812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 483812b8c5SMasahiro Yamada 493812b8c5SMasahiro Yamada# Avoid interference with shell env settings 503812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 513812b8c5SMasahiro Yamada 52066b7ed9SMichal Marek# Beautify output 53066b7ed9SMichal Marek# --------------------------------------------------------------------------- 54066b7ed9SMichal Marek# 55066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 56066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 57066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 58066b7ed9SMichal Marek# 59066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 60066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 61066b7ed9SMichal Marek# 62066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 63066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 64066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 65066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 66066b7ed9SMichal Marek# 67066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 68066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 69066b7ed9SMichal Marek# 70066b7ed9SMichal Marek# $(Q)ln $@ :< 71066b7ed9SMichal Marek# 72066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 73066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 74505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 75066b7ed9SMichal Marek# 761da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 771da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 781da177e4SLinus Torvalds 791da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 801da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 811da177e4SLinus Torvaldsendif 821da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 831da177e4SLinus Torvalds KBUILD_VERBOSE = 0 841da177e4SLinus Torvaldsendif 851da177e4SLinus Torvalds 86066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 87066b7ed9SMichal Marek quiet = 88066b7ed9SMichal Marek Q = 89066b7ed9SMichal Marekelse 90066b7ed9SMichal Marek quiet=quiet_ 91066b7ed9SMichal Marek Q = @ 92066b7ed9SMichal Marekendif 93066b7ed9SMichal Marek 94066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 95066b7ed9SMichal Marek# commands 96066b7ed9SMichal Marek 976f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 98066b7ed9SMichal Marek quiet=silent_ 9922149454SMasahiro Yamada KBUILD_VERBOSE = 0 100066b7ed9SMichal Marekendif 101066b7ed9SMichal Marek 102066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 103066b7ed9SMichal Marek 104bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 105bcf637f5SMasahiro Yamada# C compilation. 106bcf637f5SMasahiro Yamada# 107bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 108bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 109bcf637f5SMasahiro Yamada# of whether they are re-compiled or not. 110bcf637f5SMasahiro Yamada# 111bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details, 112bcf637f5SMasahiro Yamada# including where to get the "sparse" utility. 113bcf637f5SMasahiro Yamada 114bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line") 115bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = $(C) 116bcf637f5SMasahiro Yamadaendif 117bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC 118bcf637f5SMasahiro Yamada KBUILD_CHECKSRC = 0 119bcf637f5SMasahiro Yamadaendif 120bcf637f5SMasahiro Yamada 121bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC 122bcf637f5SMasahiro Yamada 123*2f7ab126SMiguel Ojeda# Enable "clippy" (a linter) as part of the Rust compilation. 124*2f7ab126SMiguel Ojeda# 125*2f7ab126SMiguel Ojeda# Use 'make CLIPPY=1' to enable it. 126*2f7ab126SMiguel Ojedaifeq ("$(origin CLIPPY)", "command line") 127*2f7ab126SMiguel Ojeda KBUILD_CLIPPY := $(CLIPPY) 128*2f7ab126SMiguel Ojedaendif 129*2f7ab126SMiguel Ojeda 130*2f7ab126SMiguel Ojedaexport KBUILD_CLIPPY 131*2f7ab126SMiguel Ojeda 132bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 133bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 134bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line") 135bcf637f5SMasahiro Yamada KBUILD_EXTMOD := $(M) 136bcf637f5SMasahiro Yamadaendif 137bcf637f5SMasahiro Yamada 138bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \ 139bcf637f5SMasahiro Yamada $(error building multiple external modules is not supported)) 140bcf637f5SMasahiro Yamada 1419a68fd7fSMasahiro Yamada$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ 1429a68fd7fSMasahiro Yamada $(error module directory path cannot contain '$x'))) 1439a68fd7fSMasahiro Yamada 14474ee585bSMasahiro Yamada# Remove trailing slashes 14574ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),) 14674ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) 14774ee585bSMasahiro Yamadaendif 14874ee585bSMasahiro Yamada 149bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD 150bcf637f5SMasahiro Yamada 15125b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 15225b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 15325b146c5SMasahiro Yamada# 15425b146c5SMasahiro Yamada# For example, you can do this: 15525b146c5SMasahiro Yamada# 15625b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 15725b146c5SMasahiro Yamada# 15825b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 15925b146c5SMasahiro Yamada# two syntaxes to specify it. 16025b146c5SMasahiro Yamada# 1611da177e4SLinus Torvalds# 1) O= 1621da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1631da177e4SLinus Torvalds# 1641da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 16525b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 16625b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1671da177e4SLinus Torvalds# 1681da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1691da177e4SLinus Torvalds# variable. 1701da177e4SLinus Torvalds 17125b146c5SMasahiro Yamada# Do we want to change the working directory? 1721da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1731da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1741da177e4SLinus Torvaldsendif 1751da177e4SLinus Torvalds 17625b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 17725b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 17825b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 17925b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 18025b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 18125b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 18225b146c5SMasahiro Yamada 18325b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 18425b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 18525b146c5SMasahiro Yamadaelse 18625b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 18725b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 18825b146c5SMasahiro Yamada 18925b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 19025b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 19125b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 19225b146c5SMasahiro Yamadaelse 19325b146c5SMasahiro Yamadaneed-sub-make := 1 19451193b76SRobert Jarzmikendif 19551193b76SRobert Jarzmik 19630cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 19730cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile))) 1981da177e4SLinus Torvalds 19925b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 20025b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 20125b146c5SMasahiro Yamadaendif 20225b146c5SMasahiro Yamada 20325b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 20480463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 20580463f1bSMasahiro Yamada# 206d8285639SMasahiro Yamada# --included-dir is added for backward compatibility, but you should not rely on 207d8285639SMasahiro Yamada# it. Please add $(srctree)/ prefix to include Makefiles in the source tree. 20825b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 20925b146c5SMasahiro Yamadaendif 2103812b8c5SMasahiro Yamada 211688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 212688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 213688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 214688931a5SMasahiro Yamadaneed-sub-make := 1 215688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 21693fdddfeSMasahiro Yamada$(this-makefile): ; 217688931a5SMasahiro Yamadaendif 218688931a5SMasahiro Yamada 21925b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 220221cc2d2SMasahiro Yamadaexport sub_make_done := 1 221221cc2d2SMasahiro Yamada 222688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 223688931a5SMasahiro Yamada 224121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 2250b35786dSMilton Miller 226121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 22716f89098SCharles Keepax @: 2280b35786dSMilton Miller 229c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 230121c2a13SMasahiro Yamada__sub-make: 23125b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 2321da177e4SLinus Torvalds 233688931a5SMasahiro Yamadaendif # need-sub-make 234221cc2d2SMasahiro Yamadaendif # sub_make_done 235688931a5SMasahiro Yamada 2361da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 237688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 2381da177e4SLinus Torvalds 2397ff52571SMasahiro Yamada# Do not print "Entering directory ...", 2407ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 2417ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 2427ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 2437ff52571SMasahiro Yamada 24425b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2459da0763bSMichal Marek # building in the source tree 2469da0763bSMichal Marek srctree := . 247051f278eSMasahiro Yamada building_out_of_srctree := 2489da0763bSMichal Marekelse 24925b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2509da0763bSMichal Marek # building in a subdirectory of the source tree 2519da0763bSMichal Marek srctree := .. 2529da0763bSMichal Marek else 25325b146c5SMasahiro Yamada srctree := $(abs_srctree) 2549da0763bSMichal Marek endif 255051f278eSMasahiro Yamada building_out_of_srctree := 1 2569da0763bSMichal Marekendif 2572c1f4f12SMasahiro Yamada 25895fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 25995fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 26095fd3f87SMasahiro Yamadaendif 2612c1f4f12SMasahiro Yamada 2627e1c0477SMichal Marekobjtree := . 2636b12de69SMasahiro YamadaVPATH := $(srctree) 2641da177e4SLinus Torvalds 265051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2661da177e4SLinus Torvalds 2672c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2682c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2692c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2702c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2712c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2722c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2732c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2742c1f4f12SMasahiro Yamada 2752c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2762c1f4f12SMasahiro Yamada 27722340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 27822340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2792c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 28059b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2814623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 282*2f7ab126SMiguel Ojeda outputmakefile rustavailable rustfmt rustfmtcheck 283805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install 284805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed. 285805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \ 286805b2e1dSMasahiro Yamada headers_install modules_install kernelrelease image_name 287993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ 288993bdde9SMasahiro Yamada image_name 289*2f7ab126SMiguel Ojedasingle-targets := %.a %.i %.rsi %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 2902c1f4f12SMasahiro Yamada 2912042b548SMasahiro Yamadaconfig-build := 2922042b548SMasahiro Yamadamixed-build := 2932042b548SMasahiro Yamadaneed-config := 1 294805b2e1dSMasahiro Yamadaneed-compiler := 1 295d7942413SMasahiro Yamadamay-sync-config := 1 296394053f4SMasahiro Yamadasingle-build := 2972c1f4f12SMasahiro Yamada 2982c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2992c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 3002042b548SMasahiro Yamada need-config := 3012c1f4f12SMasahiro Yamada endif 3022c1f4f12SMasahiro Yamadaendif 3032c1f4f12SMasahiro Yamada 304805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) 305805b2e1dSMasahiro Yamada ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) 306805b2e1dSMasahiro Yamada need-compiler := 307805b2e1dSMasahiro Yamada endif 308805b2e1dSMasahiro Yamadaendif 309805b2e1dSMasahiro Yamada 310d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 311d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 3122042b548SMasahiro Yamada may-sync-config := 313d7942413SMasahiro Yamada endif 314d7942413SMasahiro Yamadaendif 315d7942413SMasahiro Yamada 316d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 3172042b548SMasahiro Yamada may-sync-config := 318d7942413SMasahiro Yamadaendif 319d7942413SMasahiro Yamada 3202c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 321efbf9726SMasahiro Yamada ifneq ($(filter %config,$(MAKECMDGOALS)),) 3222042b548SMasahiro Yamada config-build := 1 3232c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 3242042b548SMasahiro Yamada mixed-build := 1 3252c1f4f12SMasahiro Yamada endif 3262c1f4f12SMasahiro Yamada endif 3272c1f4f12SMasahiro Yamadaendif 32822340a06SMasahiro Yamada 329394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 330394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 331394053f4SMasahiro Yamada single-build := 1 332394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 333394053f4SMasahiro Yamada mixed-build := 1 334394053f4SMasahiro Yamada endif 335394053f4SMasahiro Yamadaendif 336394053f4SMasahiro Yamada 33722340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 33822340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 33922340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3402042b548SMasahiro Yamada mixed-build := 1 34122340a06SMasahiro Yamada endif 34222340a06SMasahiro Yamadaendif 34322340a06SMasahiro Yamada 3442c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3452c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3462c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3472042b548SMasahiro Yamada mixed-build := 1 3482c1f4f12SMasahiro Yamada endif 3492c1f4f12SMasahiro Yamadaendif 3502c1f4f12SMasahiro Yamada 3512042b548SMasahiro Yamadaifdef mixed-build 3522c1f4f12SMasahiro Yamada# =========================================================================== 3532c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3542c1f4f12SMasahiro Yamada# Handle them one by one. 3552c1f4f12SMasahiro Yamada 3562c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3572c1f4f12SMasahiro Yamada 358121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 3592c1f4f12SMasahiro Yamada @: 3602c1f4f12SMasahiro Yamada 3612c1f4f12SMasahiro Yamada__build_one_by_one: 3622c1f4f12SMasahiro Yamada $(Q)set -e; \ 3632c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3642c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3652c1f4f12SMasahiro Yamada done 3662c1f4f12SMasahiro Yamada 3672042b548SMasahiro Yamadaelse # !mixed-build 3682c1f4f12SMasahiro Yamada 3693204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include 3702c1f4f12SMasahiro Yamada 3712c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3722c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 3732c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3742c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3752c1f4f12SMasahiro Yamada 3763204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3791da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3801da177e4SLinus Torvalds# 3811da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3821da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3831da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3841da177e4SLinus Torvalds# make ARCH=ia64 3851da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3861da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3891da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3901da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3911da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3921da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3931da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3941da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3951da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3962331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds# Architecture as present in compile.h 3991da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 4006752ed90SThomas GleixnerSRCARCH := $(ARCH) 4011da177e4SLinus Torvalds 402d746d647SSam Ravnborg# Additional ARCH settings for x86 403d746d647SSam Ravnborgifeq ($(ARCH),i386) 404d746d647SSam Ravnborg SRCARCH := x86 405d746d647SSam Ravnborgendif 406d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 407d746d647SSam Ravnborg SRCARCH := x86 408d746d647SSam Ravnborgendif 40974b469f2SSam Ravnborg 4105e538790SSam Ravnborg# Additional ARCH settings for sparc 411e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 412e69f58c0SNamhyung Kim SRCARCH := sparc 413e69f58c0SNamhyung Kimendif 414a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 4155e538790SSam Ravnborg SRCARCH := sparc 416a439fe51SSam Ravnborgendif 4172fb9b1bdSSam Ravnborg 4185f6e0fe0SMasahiro Yamada# Additional ARCH settings for parisc 4195f6e0fe0SMasahiro Yamadaifeq ($(ARCH),parisc64) 4205f6e0fe0SMasahiro Yamada SRCARCH := parisc 4215f6e0fe0SMasahiro Yamadaendif 4225f6e0fe0SMasahiro Yamada 423f02aa48dSMasahiro Yamadaexport cross_compiling := 424f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH)) 425f02aa48dSMasahiro Yamadacross_compiling := 1 426f02aa48dSMasahiro Yamadaendif 427f02aa48dSMasahiro Yamada 42814cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 42941263fc6SBen Gardinerexport KCONFIG_CONFIG 43014cdd3c4SRoman Zippel 4311da177e4SLinus Torvalds# SHELL used by kbuild 432858805b3SMasahiro YamadaCONFIG_SHELL := sh 4331da177e4SLinus Torvalds 4346d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4356d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4366d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 437d7f14c66SUwe Kleine-König 438a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 439e9c28192SNathan Chancellorifneq ($(filter %/,$(LLVM)),) 440e9c28192SNathan ChancellorLLVM_PREFIX := $(LLVM) 441e9c28192SNathan Chancellorelse ifneq ($(filter -%,$(LLVM)),) 442e9c28192SNathan ChancellorLLVM_SUFFIX := $(LLVM) 443e9c28192SNathan Chancellorendif 444e9c28192SNathan Chancellor 445e9c28192SNathan ChancellorHOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 446e9c28192SNathan ChancellorHOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 447a0d1c951SMasahiro Yamadaelse 4481da177e4SLinus TorvaldsHOSTCC = gcc 4491da177e4SLinus TorvaldsHOSTCXX = g++ 450a0d1c951SMasahiro Yamadaendif 451*2f7ab126SMiguel OjedaHOSTRUSTC = rustc 452d5ea4fecSChun-Tse ShaoHOSTPKG_CONFIG = pkg-config 4537f3a59dbSMasahiro Yamada 454f67695c9SElliot BermanKBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 4551e240781SArnd Bergmann -O2 -fomit-frame-pointer -std=gnu11 \ 4564d94f910SMark Rutland -Wdeclaration-after-statement 457f67695c9SElliot BermanKBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) 458f67695c9SElliot BermanKBUILD_USERLDFLAGS := $(USERLDFLAGS) 4597f3a59dbSMasahiro Yamada 460*2f7ab126SMiguel Ojeda# These flags apply to all Rust code in the tree, including the kernel and 461*2f7ab126SMiguel Ojeda# host programs. 462*2f7ab126SMiguel Ojedaexport rust_common_flags := --edition=2021 \ 463*2f7ab126SMiguel Ojeda -Zbinary_dep_depinfo=y \ 464*2f7ab126SMiguel Ojeda -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \ 465*2f7ab126SMiguel Ojeda -Dunreachable_pub -Dnon_ascii_idents \ 466*2f7ab126SMiguel Ojeda -Wmissing_docs \ 467*2f7ab126SMiguel Ojeda -Drustdoc::missing_crate_level_docs \ 468*2f7ab126SMiguel Ojeda -Dclippy::correctness -Dclippy::style \ 469*2f7ab126SMiguel Ojeda -Dclippy::suspicious -Dclippy::complexity \ 470*2f7ab126SMiguel Ojeda -Dclippy::perf \ 471*2f7ab126SMiguel Ojeda -Dclippy::let_unit_value -Dclippy::mut_mut \ 472*2f7ab126SMiguel Ojeda -Dclippy::needless_bitwise_bool \ 473*2f7ab126SMiguel Ojeda -Dclippy::needless_continue \ 474*2f7ab126SMiguel Ojeda -Wclippy::dbg_macro 475*2f7ab126SMiguel Ojeda 476f67695c9SElliot BermanKBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 477735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 478*2f7ab126SMiguel OjedaKBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ 479*2f7ab126SMiguel Ojeda -Zallow-features= $(HOSTRUSTFLAGS) 480f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 481f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds# Make variables (CC, etc...) 4841da177e4SLinus TorvaldsCPP = $(CC) -E 485a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 486e9c28192SNathan ChancellorCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 487e9c28192SNathan ChancellorLD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 488e9c28192SNathan ChancellorAR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 489e9c28192SNathan ChancellorNM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 490e9c28192SNathan ChancellorOBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 491e9c28192SNathan ChancellorOBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 492e9c28192SNathan ChancellorREADELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 493e9c28192SNathan ChancellorSTRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 494a0d1c951SMasahiro Yamadaelse 495a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 496a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 4971da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4981da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4991da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 5001da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 501eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 502a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 503a0d1c951SMasahiro Yamadaendif 504*2f7ab126SMiguel OjedaRUSTC = rustc 505*2f7ab126SMiguel OjedaRUSTDOC = rustdoc 506*2f7ab126SMiguel OjedaRUSTFMT = rustfmt 507*2f7ab126SMiguel OjedaCLIPPY_DRIVER = clippy-driver 508*2f7ab126SMiguel OjedaBINDGEN = bindgen 509*2f7ab126SMiguel OjedaCARGO = cargo 510e83b9f55SAndrii NakryikoPAHOLE = pahole 511c9a0f3b8SJiri OlsaRESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 51273a4f6dbSMasahiro YamadaLEX = flex 51373a4f6dbSMasahiro YamadaYACC = bison 5141da177e4SLinus TorvaldsAWK = awk 515caa27b66SSam RavnborgINSTALLKERNEL := installkernel 516436e980eSDominique MartinetDEPMOD = depmod 5171da177e4SLinus TorvaldsPERL = perl 518e9781b52SMasahiro YamadaPYTHON3 = python3 5191da177e4SLinus TorvaldsCHECK = sparse 520858805b3SMasahiro YamadaBASH = bash 521e4a42c82SDenis EfremovKGZIP = gzip 522e4a42c82SDenis EfremovKBZIP2 = bzip2 523e4a42c82SDenis EfremovKLZOP = lzop 5248dfb61dcSDenis EfremovLZMA = lzma 5258dfb61dcSDenis EfremovLZ4 = lz4c 5268dfb61dcSDenis EfremovXZ = xz 52748f7ddf7SNick TerrellZSTD = zstd 5288dfb61dcSDenis Efremov 5299741e07eSJiri OlsaPAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) 5309741e07eSJiri Olsa 53180a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 5326c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 5330c22be07SDouglas AndersonNOSTDINC_FLAGS := 5346588169dSSam RavnborgCFLAGS_MODULE = 535*2f7ab126SMiguel OjedaRUSTFLAGS_MODULE = 5366588169dSSam RavnborgAFLAGS_MODULE = 5376588169dSSam RavnborgLDFLAGS_MODULE = 5381da177e4SLinus TorvaldsCFLAGS_KERNEL = 539*2f7ab126SMiguel OjedaRUSTFLAGS_KERNEL = 5401da177e4SLinus TorvaldsAFLAGS_KERNEL = 541b36fad65SMichal MarekLDFLAGS_vmlinux = 5421da177e4SLinus Torvalds 543abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 544abbf1590SDavid HowellsUSERINCLUDE := \ 5459d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 5469d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 547abbf1590SDavid Howells -I$(srctree)/include/uapi \ 5483308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 549ce6ed1c4SMasahiro Yamada -include $(srctree)/include/linux/compiler-version.h \ 550abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 551abbf1590SDavid Howells 5521da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 5531da177e4SLinus Torvalds# Needed to be compatible with the O= option 554abbf1590SDavid HowellsLINUXINCLUDE := \ 5559d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 5569d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 557051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 558f8224f7fSMasahiro Yamada -I$(objtree)/include \ 559f8224f7fSMasahiro Yamada $(USERINCLUDE) 5601da177e4SLinus Torvalds 56142a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 562eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 56342a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 564b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 565172aad81SOlaf Hering -Werror=return-type -Wno-format-security \ 566e8c07082SArnd Bergmann -std=gnu11 567433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 568*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS := $(rust_common_flags) \ 569*2f7ab126SMiguel Ojeda --target=$(objtree)/rust/target.json \ 570*2f7ab126SMiguel Ojeda -Cpanic=abort -Cembed-bitcode=n -Clto=n \ 571*2f7ab126SMiguel Ojeda -Cforce-unwind-tables=n -Ccodegen-units=1 \ 572*2f7ab126SMiguel Ojeda -Csymbol-mangling-version=v0 \ 573*2f7ab126SMiguel Ojeda -Crelocation-model=static \ 574*2f7ab126SMiguel Ojeda -Zfunction-sections=n \ 575*2f7ab126SMiguel Ojeda -Dclippy::float_arithmetic 576*2f7ab126SMiguel Ojeda 57780c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 57880c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 579*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL := 5806588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 5816588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 582*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_MODULE := --cfg MODULE 58310df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 584d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 5855241ab4cSMasahiro YamadaCLANG_FLAGS := 5861da177e4SLinus Torvalds 587*2f7ab126SMiguel Ojedaifeq ($(KBUILD_CLIPPY),1) 588*2f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY_QUIET := CLIPPY 589*2f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 590*2f7ab126SMiguel Ojedaelse 591*2f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY_QUIET := RUSTC 592*2f7ab126SMiguel Ojeda RUSTC_OR_CLIPPY = $(RUSTC) 593*2f7ab126SMiguel Ojedaendif 594*2f7ab126SMiguel Ojeda 595*2f7ab126SMiguel Ojedaifdef RUST_LIB_SRC 596*2f7ab126SMiguel Ojeda export RUST_LIB_SRC 597*2f7ab126SMiguel Ojedaendif 598*2f7ab126SMiguel Ojeda 599*2f7ab126SMiguel Ojeda# Allows the usage of unstable features in stable compilers. 600*2f7ab126SMiguel Ojedaexport RUSTC_BOOTSTRAP := 1 601*2f7ab126SMiguel Ojeda 602d5ea4fecSChun-Tse Shaoexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 603*2f7ab126SMiguel Ojedaexport RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO 604*2f7ab126SMiguel Ojedaexport HOSTRUSTC KBUILD_HOSTRUSTFLAGS 605d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 606d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 60748f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 6087bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 609f67695c9SElliot Bermanexport KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 6101da177e4SLinus Torvalds 611d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 6120e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 613*2f7ab126SMiguel Ojedaexport KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE 614222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 615*2f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE 616*2f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL 6179741e07eSJiri Olsaexport PAHOLE_FLAGS 6181da177e4SLinus Torvalds 6191da177e4SLinus Torvalds# Files to ignore in find ... statements 6201da177e4SLinus Torvalds 621ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 622ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 623ae63b2d7SPrarit Bhargava -prune -o 624450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 625450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds# =========================================================================== 6281da177e4SLinus Torvalds# Rules shared between *config targets and build targets 6291da177e4SLinus Torvalds 630312a3d09SCao jin# Basic helpers built in scripts/basic/ 6314f193362SPaul SmithPHONY += scripts_basic 6321da177e4SLinus Torvaldsscripts_basic: 6331da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 6341da177e4SLinus Torvalds 6354f193362SPaul SmithPHONY += outputmakefile 6362728fcfaSMasahiro Yamadaifdef building_out_of_srctree 637e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 638fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 639fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 640fd5f0cd6SJan Beulich# output directory. 6413a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 6423a51ff34SVladimir Kondratiev# ignore whole output directory 6432728fcfaSMasahiro Yamada 6442728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN Makefile 6452728fcfaSMasahiro Yamada cmd_makefile = { \ 6462728fcfaSMasahiro Yamada echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ 6472728fcfaSMasahiro Yamada echo "include $(srctree)/Makefile"; \ 6482728fcfaSMasahiro Yamada } > Makefile 6492728fcfaSMasahiro Yamada 6501da177e4SLinus Torvaldsoutputmakefile: 651e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 652e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 653e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 654e8e83a23SMasahiro Yamada echo >&2 "***"; \ 655e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 656e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 657e8e83a23SMasahiro Yamada echo >&2 "***"; \ 658e8e83a23SMasahiro Yamada false; \ 659e8e83a23SMasahiro Yamada fi 66092979997SAndi Kleen $(Q)ln -fsn $(srctree) source 6612728fcfaSMasahiro Yamada $(call cmd,makefile) 662156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 663156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 664fd5f0cd6SJan Beulichendif 6651da177e4SLinus Torvalds 666db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 667db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 668db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 669db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade. 6706072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 671db07562aSNick Desaulniers 672db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 6736f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang 674ae6b289aSChris Friesendif 675ae6b289aSChris Fries 67657fd251cSMasahiro Yamada# Include this also for config targets because some architectures need 67757fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE. 678805b2e1dSMasahiro Yamadaifdef need-compiler 67957fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler 680805b2e1dSMasahiro Yamadaendif 68157fd251cSMasahiro Yamada 6822042b548SMasahiro Yamadaifdef config-build 6831da177e4SLinus Torvalds# =========================================================================== 6841da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 6851da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 6881da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 6891da177e4SLinus Torvalds# used for 'make defconfig' 6903204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 691315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 6921da177e4SLinus Torvalds 69336de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 69431110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 69531110ebbSSam Ravnborg 69636de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 6971da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 6981da177e4SLinus Torvalds 6992042b548SMasahiro Yamadaelse #!config-build 7001da177e4SLinus Torvalds# =========================================================================== 7011da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 7021da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 7031da177e4SLinus Torvalds 7042c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 705121c2a13SMasahiro Yamada# but instead __all depend on modules 7062c1f4f12SMasahiro YamadaPHONY += all 7072c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 708121c2a13SMasahiro Yamada__all: all 7092c1f4f12SMasahiro Yamadaelse 710121c2a13SMasahiro Yamada__all: modules 7112c1f4f12SMasahiro Yamadaendif 7122c1f4f12SMasahiro Yamada 7132c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 7142c1f4f12SMasahiro Yamada# Normally, just do built-in. 7152c1f4f12SMasahiro Yamada 7162c1f4f12SMasahiro YamadaKBUILD_MODULES := 7172c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 7182c1f4f12SMasahiro Yamada 7192c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 7202c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 7214b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 7222c1f4f12SMasahiro Yamadaendif 7232c1f4f12SMasahiro Yamada 7242c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 7252c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 7262c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 7272c1f4f12SMasahiro Yamada 7286ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) 7292c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 7302c1f4f12SMasahiro Yamadaendif 7312c1f4f12SMasahiro Yamada 7322c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 7332c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 7342c1f4f12SMasahiro Yamadaendif 7352c1f4f12SMasahiro Yamada 7362c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 7372c1f4f12SMasahiro Yamada 7382042b548SMasahiro Yamadaifdef need-config 739d93a18f2SMasahiro Yamadainclude include/config/auto.conf 740d93a18f2SMasahiro Yamadaendif 741d93a18f2SMasahiro Yamada 7421da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 7431da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 744d92cc4d5SMasahiro Yamadacore-y := init/ usr/ arch/$(SRCARCH)/ 745f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 746d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 7478b5f4eb3SMasahiro Yamadadrivers-$(CONFIG_NET) += net/ 7488b5f4eb3SMasahiro Yamadadrivers-y += virt/ 7491da177e4SLinus Torvaldslibs-y := lib/ 7501da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 7511da177e4SLinus Torvalds 752315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 753315bab4eSMasahiro Yamada# command line. 754315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 755315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 756315bab4eSMasahiro Yamadaall: vmlinux 757315bab4eSMasahiro Yamada 7587d73c3e9SNick DesaulniersCFLAGS_GCOV := -fprofile-arcs -ftest-coverage 7597d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 7607d73c3e9SNick DesaulniersCFLAGS_GCOV += -fno-tree-loop-im 7617d73c3e9SNick Desaulniersendif 7625aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 763315bab4eSMasahiro Yamada 764b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 765b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 766b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 767b1f4ff74SPaulo Zanoniendif 768b1f4ff74SPaulo Zanoni 7693204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile 770315bab4eSMasahiro Yamada 7712042b548SMasahiro Yamadaifdef need-config 7722042b548SMasahiro Yamadaifdef may-sync-config 773315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 774315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 775315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 776d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 7771da177e4SLinus Torvalds 77805850719SMasahiro Yamada$(KCONFIG_CONFIG): 77905850719SMasahiro Yamada @echo >&2 '***' 78005850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 78105850719SMasahiro Yamada @echo >&2 '***' 78205850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 78305850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 78405850719SMasahiro Yamada @echo >&2 '***' 78505850719SMasahiro Yamada @/bin/false 7861da177e4SLinus Torvalds 78761277981SUlf Magnusson# The actual configuration files used during the build are stored in 78861277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 78961277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 7909390dff6SMasahiro Yamada# 7919390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 7929390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 793f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 794d952cfafSMasahiro Yamada# 795d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 796d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input. 797*2f7ab126SMiguel Ojeda%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) 798d952cfafSMasahiro Yamada $(Q)$(kecho) " SYNC $@" 799d952cfafSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 8002042b548SMasahiro Yamadaelse # !may-sync-config 801d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 802d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 803d7942413SMasahiro Yamada# Use auto.conf to trigger the test 8049ee4e336SSam RavnborgPHONY += include/config/auto.conf 8059ee4e336SSam Ravnborg 8069ee4e336SSam Ravnborginclude/config/auto.conf: 807264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 8085369f550SMichal Marek echo >&2; \ 8095369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 8105369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 8115369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 8125369f550SMichal Marek echo >&2 ; \ 8139ee4e336SSam Ravnborg /bin/false) 8149ee4e336SSam Ravnborg 815d7942413SMasahiro Yamadaendif # may-sync-config 8162042b548SMasahiro Yamadaendif # need-config 8171da177e4SLinus Torvalds 8187d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-delete-null-pointer-checks 819ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 820bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 821bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 8226f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 823a1c48bb1SGeert Uytterhoeven 82415f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 825a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 826*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=2 82715f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 82815f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 829*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=s 8301da177e4SLinus Torvaldsendif 8311da177e4SLinus Torvalds 832*2f7ab126SMiguel Ojeda# Always set `debug-assertions` and `overflow-checks` because their default 833*2f7ab126SMiguel Ojeda# depends on `opt-level` and `debug-assertions`, respectively. 834*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) 835*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) 836*2f7ab126SMiguel Ojeda 83769102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 8387d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 8397d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to 8407d73c3e9SNick Desaulniers# -fno-allow-store-data-races. 84169102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 842b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 8437d73c3e9SNick Desaulniersendif 84469102311SJiri Kosina 8451873e870SAndi Kleenifdef CONFIG_READABLE_ASM 8461873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 8471873e870SAndi Kleen# reorder blocks reorders the control in the function 8481873e870SAndi Kleen# ipa clone creates specialized cloned functions 8491873e870SAndi Kleen# partial inlining inlines only parts of functions 8507d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 8511873e870SAndi Kleenendif 8521873e870SAndi Kleen 85308f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 854a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 85535bb5b1eSAndi Kleenendif 85635bb5b1eSAndi Kleen 857893ab004SMasahiro Yamadastackp-flags-y := -fno-stack-protector 858050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 859050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 8602a61f474SMasahiro Yamada 8612a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 862e06b8b98SSam Ravnborg 8633fe617ccSLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror 864f0be87c4SLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds 865e92e2634SMasahiro YamadaKBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) 8663fe617ccSLinus Torvalds 867*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings 868*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) 869*2f7ab126SMiguel Ojeda 870076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 871a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 872e8c07082SArnd Bergmann# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. 873a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 874d936eb23SLinus Torvaldselse 875d936eb23SLinus Torvalds 87649832c81SRandy Dunlap# gcc inanely warns about local variables called 'main' 87749832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main 878cfe17c9bSMasahiro Yamadaendif 879cfe17c9bSMasahiro Yamada 880885480b0SNathan Chancellor# These warnings generated too much noise in a regular build. 881885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 882885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 8830a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 8846272cc38SNathan Chancellor 88549beadbdSLinus Torvalds# These result in bogus false positives 88649beadbdSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) 88749beadbdSLinus Torvalds 8881da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 889a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 890*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 8911da177e4SLinus Torvaldselse 8927e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 8937e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 8947e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 8957e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 8967e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 897*2f7ab126SMiguel Ojeda# In the Rust target specification, "frame-pointer" is set explicitly 898*2f7ab126SMiguel Ojeda# to "may-omit". 8997e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 900a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 9011da177e4SLinus Torvaldsendif 9027e9501fdSRabin Vincentendif 9031da177e4SLinus Torvalds 904f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern. 905f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN 906709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 907709a972eSKees Cookendif 908709a972eSKees Cook 909f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value. 910f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO 911f0fe00d4Sglider@google.comKBUILD_CFLAGS += -ftrivial-auto-var-init=zero 912f02003c8SKees Cookifdef CONFIG_CC_IS_CLANG 913f02003c8SKees Cook# https://bugs.llvm.org/show_bug.cgi?id=45497 914f0fe00d4Sglider@google.comKBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 915f0fe00d4Sglider@google.comendif 916f02003c8SKees Cookendif 917f0fe00d4Sglider@google.com 91839218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes 91939218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers. 92039218ff4SKees CookKBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 92139218ff4SKees Cook 922a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 923a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS 924a82adfd5SKees CookKBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 925a82adfd5SKees Cookendif 926a82adfd5SKees Cook 927606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 9283b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC 92907d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 9302f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 9312f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 9322f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 9332f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 9342f4df001SVasily Gorbik endif 9352f4df001SVasily Gorbik endif 93607d04081SVasily Gorbikendif 93722c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 93822c8542dSSami Tolvanen CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 93922c8542dSSami Tolvanenendif 9403b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 9413b15cdc1SSami Tolvanen ifdef CONFIG_HAVE_C_RECORDMCOUNT 9423b15cdc1SSami Tolvanen BUILD_C_RECORDMCOUNT := y 9433b15cdc1SSami Tolvanen export BUILD_C_RECORDMCOUNT 9443b15cdc1SSami Tolvanen endif 9453b15cdc1SSami Tolvanenendif 946a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 9477d73c3e9SNick Desaulniers # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 948f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 949f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 950f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 951a2546faeSSteven Rostedt endif 952f28bc3c3SVasily Gorbikendif 953f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 954f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 955f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 95616444a8aSArnaldo Carvalho de Meloendif 95716444a8aSArnaldo Carvalho de Melo 95891341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 95991341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 9607d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-inline-functions-called-once 96191341d4bSSam Ravnborgendif 96291341d4bSSam Ravnborg 963*2f7ab126SMiguel Ojeda# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). 96490ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 965e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 966*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y 967e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 96890ad4052SMasahiro Yamadaendif 96990ad4052SMasahiro Yamada 970d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK 971d08b9f0cSSami TolvanenCC_FLAGS_SCS := -fsanitize=shadow-call-stack 972d08b9f0cSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_SCS) 973d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS 974d08b9f0cSSami Tolvanenendif 975d08b9f0cSSami Tolvanen 976dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG 977dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN 9782b868952SAlexander LobakinCC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 9797f69180bSMasahiro YamadaKBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache 980dc5723b0SSami Tolvanenelse 9812b868952SAlexander LobakinCC_FLAGS_LTO := -flto 982dc5723b0SSami Tolvanenendif 983dc5723b0SSami TolvanenCC_FLAGS_LTO += -fvisibility=hidden 98422d429e7SSami Tolvanen 98522d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size 98622d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5 98724845dcbSNick Desaulniers 9880236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion 9890236526dSTor Vic# when using lld < 13.0.0. 99024845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0) 9910236526dSTor Vicifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0) 99224845dcbSNick DesaulniersKBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) 99324845dcbSNick Desaulniersendif 994dc5723b0SSami Tolvanenendif 9950236526dSTor Vicendif 996dc5723b0SSami Tolvanen 997dc5723b0SSami Tolvanenifdef CONFIG_LTO 9985e95325fSSami TolvanenKBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 9995e95325fSSami TolvanenKBUILD_AFLAGS += -fno-lto 1000dc5723b0SSami Tolvanenexport CC_FLAGS_LTO 1001dc5723b0SSami Tolvanenendif 1002dc5723b0SSami Tolvanen 1003cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG 1004cf68fffbSSami TolvanenCC_FLAGS_CFI := -fsanitize=cfi \ 1005cf68fffbSSami Tolvanen -fsanitize-cfi-cross-dso \ 1006cf68fffbSSami Tolvanen -fno-sanitize-cfi-canonical-jump-tables \ 1007cf68fffbSSami Tolvanen -fno-sanitize-trap=cfi \ 1008cf68fffbSSami Tolvanen -fno-sanitize-blacklist 1009cf68fffbSSami Tolvanen 1010cf68fffbSSami Tolvanenifdef CONFIG_CFI_PERMISSIVE 1011cf68fffbSSami TolvanenCC_FLAGS_CFI += -fsanitize-recover=cfi 1012cf68fffbSSami Tolvanenendif 1013cf68fffbSSami Tolvanen 1014cf68fffbSSami Tolvanen# If LTO flags are filtered out, we must also filter out CFI. 1015cf68fffbSSami TolvanenCC_FLAGS_LTO += $(CC_FLAGS_CFI) 1016cf68fffbSSami TolvanenKBUILD_CFLAGS += $(CC_FLAGS_CFI) 1017cf68fffbSSami Tolvanenexport CC_FLAGS_CFI 1018cf68fffbSSami Tolvanenendif 1019cf68fffbSSami Tolvanen 1020cf536e18SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B 1021cf536e18SFeng TangKBUILD_CFLAGS += -falign-functions=64 102209c60546SFeng Tangendif 102309c60546SFeng Tang 1024e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 102504e85bbfSAlexey DobriyanNOSTDINC_FLAGS += -nostdinc 1026e8e69931SSam Ravnborg 10271da177e4SLinus Torvalds# warn about C99 declaration after statement 1028a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 10291da177e4SLinus Torvalds 10300bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 10318289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 10320bb95f80SKees Cook 1033070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 1034fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 10351da177e4SLinus Torvalds 1036552a23a0SGustavo A. R. Silva# In order to make sure new function cast mismatches are not introduced 1037552a23a0SGustavo A. R. Silva# in the kernel (to avoid tripping CFI checking), the kernel should be 1038552a23a0SGustavo A. R. Silva# globally built with -Wcast-function-type. 1039552a23a0SGustavo A. R. SilvaKBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) 1040552a23a0SGustavo A. R. Silva 1041217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 1042217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 1043217c3e01SStephen Rothwell 10445c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 10455a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 10465c45de21SLinus Torvalds 1047adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 1048adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 1049adc71920SLinus Torvalds 105078a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 10517d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 10527d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized 10537d73c3e9SNick Desaulniersendif 105478a5255fSLinus Torvalds 105586cffecdSKees Cookifdef CONFIG_CC_IS_GCC 105686cffecdSKees Cook# The allocators already balk at large sizes, so silence the compiler 105786cffecdSKees Cook# warnings for bounds checks involving those possible values. While 105886cffecdSKees Cook# -Wno-alloc-size-larger-than would normally be used here, earlier versions 105986cffecdSKees Cook# of gcc (<9.1) weirdly don't handle the option correctly when _other_ 106086cffecdSKees Cook# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX 106186cffecdSKees Cook# doesn't work (as it is documented to), silently resolving to "0" prior to 106286cffecdSKees Cook# version 9.1 (and producing an error more recently). Numeric values larger 106386cffecdSKees Cook# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently 106486cffecdSKees Cook# ignored, continuing to default to PTRDIFF_MAX. So, left with no other 106586cffecdSKees Cook# choice, we must perform a versioned check to disable this warning. 106686cffecdSKees Cook# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au 106786cffecdSKees CookKBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than) 106886cffecdSKees Cookendif 106986cffecdSKees Cook 1070fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 10718b42cf2fSMasahiro YamadaKBUILD_CFLAGS += -fno-strict-overflow 1072d0115552SLinus Torvalds 10733ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 10747d4eb0d8SMasahiro YamadaKBUILD_CFLAGS += -fno-stack-check 10753ce120b1SLinus Torvalds 10768f7f5c9fSAndi Kleen# conserve stack if available 10777d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC 10787d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fconserve-stack 10797d73c3e9SNick Desaulniersendif 10808f7f5c9fSAndi Kleen 1081fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 108287de84c9SMasahiro YamadaKBUILD_CFLAGS += -Werror=date-time 1083fe7c36c7SJosh Triplett 1084ea8daa7bSDaniel Wagner# enforce correct pointer usage 1085ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 1086ea8daa7bSDaniel Wagner 1087c834f0e8SKees Cook# Require designated initializers for all marked structures 1088c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 1089c834f0e8SKees Cook 1090a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 1091a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 1092a73619a8SMasahiro Yamada 1093e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed 1094e0fe0bbeSMasahiro Yamadainclude-y := scripts/Makefile.extrawarn 10956947fd96SMasahiro Yamadainclude-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1096e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN) += scripts/Makefile.kasan 1097e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1098e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1099e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV) += scripts/Makefile.kcov 1100613f4b3eSKees Cookinclude-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1101e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1102e0fe0bbeSMasahiro Yamada 1103e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y)) 1104a86fe353SMasahiro Yamada 1105132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last. 1106132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel 1107132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point. 1108bf5438fcSJason Baron 1109*2f7ab126SMiguel Ojeda# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments 11108cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 11118cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 11128cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 1113*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KRUSTFLAGS) 111452bcc330SSam Ravnborg 1115a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1 1116a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1 111718991197SRoland McGrath 11180d362be5SNick DesaulniersKBUILD_LDFLAGS += -z noexecstack 11190d362be5SNick Desaulniersifeq ($(CONFIG_LD_IS_BFD),y) 11200d362be5SNick DesaulniersKBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 11210d362be5SNick Desaulniersendif 11220d362be5SNick Desaulniers 11235d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1124d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 11255d7d18f5SDavid Howellsendif 11265d7d18f5SDavid Howells 11275cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 112827f2a4dbSNick DesaulniersLDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags 11295cf896fbSPeter Collingbourneendif 11305cf896fbSPeter Collingbourne 113159612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the 113259612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script. 113359612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN 113459612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn 113559612b24SNathan Chancellorendif 113659612b24SNathan Chancellor 11377f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 11387f58b487SMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 11397f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 11407f3a59dbSMasahiro Yamada 114180591e61SLuc Van Oostenryck# make the checker run with the right architecture 114280591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 114380591e61SLuc Van Oostenryck 114414516765SLuc Van Oostenryck# insure the checker run with the right endianness 114514516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 114614516765SLuc Van Oostenryck 11471f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 11481f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 11491f2f01b1SLuc Van Oostenryck 11501da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 11511da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 11521da177e4SLinus Torvalds# set in the environment 11531da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 11541da177e4SLinus Torvalds# this default value 11551da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds# 11581da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 11591da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 11601da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds# 1163f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1164f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1165f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 1166f4d4ffc0SJason Cooper# 1167f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1168f4d4ffc0SJason Cooper 1169f4d4ffc0SJason Cooper# 11701da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 11711da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 1172070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 11731da177e4SLinus Torvalds# 11741da177e4SLinus Torvalds 1175df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 11761da177e4SLinus Torvaldsexport MODLIB 11771da177e4SLinus Torvalds 1178e00d8880SMasahiro YamadaPHONY += prepare0 1179e2a666d5SRusty Russell 1180ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 11817f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order 11827f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps 118347801c97SMasahiro Yamada 11841da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 11854c928904SMasahiro Yamadacore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ 11864c928904SMasahiro Yamadacore-$(CONFIG_BLOCK) += block/ 1187ed29b0b4SJens Axboecore-$(CONFIG_IO_URING) += io_uring/ 1188*2f7ab126SMiguel Ojedacore-$(CONFIG_RUST) += rust/ 11891da177e4SLinus Torvalds 119023febe37SMasahiro Yamadavmlinux-dirs := $(patsubst %/,%,$(filter %/, \ 11911da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 119295fb6317SMasahiro Yamada $(libs-y) $(libs-m))) 11931da177e4SLinus Torvalds 11941eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 119523febe37SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(core-) \ 119695fb6317SMasahiro Yamada $(drivers-) $(libs-)))) 11971da177e4SLinus Torvalds 1198c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 119976cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1200c99f3918SMasahiro Yamada 120111314751SMasahiro Yamadasubdir-modorder := $(addsuffix /modules.order, $(build-dirs)) 120211314751SMasahiro Yamada 12031f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1204f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) 1205f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) 1206f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES 1207f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1208f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1209f0d50ca0SMasahiro Yamadaelse 1210f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1211f0d50ca0SMasahiro Yamadaendif 1212f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) 1213f0d50ca0SMasahiro Yamada 1214f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS 121595698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 121685f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1217233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 12181da177e4SLinus Torvalds 1219d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 12201da177e4SLinus Torvalds 12213fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 12223fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 12232441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 12241f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 12251f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 12261f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 12271f50b80aSMasahiro YamadaKBUILD_MODULES := 1 1228fb2d99beSMasahiro Yamada 1229fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order 1230fb2d99beSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 123153632ba8SMasahiro Yamada "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive" 12321f50b80aSMasahiro Yamadaendif 12331f50b80aSMasahiro Yamada 123407a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 123507a422bbSMasahiro Yamada 123688694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 123788694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 123888694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 123988694cffSQuentin Perret 124007a422bbSMasahiro Yamada$(autoksyms_h): 124188694cffSQuentin Perret $(call cmd,autoksyms_h) 124223121ca2SNicolas Pitre 1243fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1244fbe6e37dSNicholas Piggin 1245fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1246fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 12473ec8a5b3SMasahiro Yamada $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ 1248fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 12492441e78bSNicolas Pitre 12503fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 12510b956e20SRasmus Villemoes +$(call if_changed_dep,link-vmlinux) 1252741f98feSSam Ravnborg 1253392885eeSMasahiro Yamadatargets := vmlinux 1254392885eeSMasahiro Yamada 12551da177e4SLinus Torvalds# The actual objects are generated when descending, 12561da177e4SLinus Torvalds# make sure no implicit rule kicks in 1257b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ; 12581da177e4SLinus Torvalds 1259ba97df45SMasahiro Yamadafilechk_kernel.release = \ 12600d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 12610d0e7718SMichal Marek 126283a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 126324512795SMasahiro Yamadainclude/config/kernel.release: FORCE 12640d0e7718SMichal Marek $(call filechk,kernel.release) 1265cb58455cSSam Ravnborg 1266d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1267d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1268d8821622SMasahiro Yamada# in parallel 1269d8821622SMasahiro YamadaPHONY += scripts 127060df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1271d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1272cb58455cSSam Ravnborg 12731da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 12745bb78269SSam Ravnborg# or the modules are listed in "prepare". 12755bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 12765bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 12775bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 12781da177e4SLinus Torvalds 1279a5139fb3SMasahiro YamadaPHONY += prepare archprepare 12805bb78269SSam Ravnborg 128136de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 12823044dd05SMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 12831476fee5SMasahiro Yamada include/generated/autoconf.h remove-stale-files 12845bb78269SSam Ravnborg 128565bba042SMasahiro Yamadaprepare0: archprepare 128660df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 12878d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 128886feeaa8SSam Ravnborg 12891da177e4SLinus Torvalds# All the preparing.. 12900d989ac2SMasahiro Yamadaprepare: prepare0 1291*2f7ab126SMiguel Ojedaifdef CONFIG_RUST 1292*2f7ab126SMiguel Ojeda $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v 1293*2f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust 1294*2f7ab126SMiguel Ojedaendif 1295b9ab5ebbSJosh Poimboeuf 12961476fee5SMasahiro YamadaPHONY += remove-stale-files 12971476fee5SMasahiro Yamadaremove-stale-files: 12981476fee5SMasahiro Yamada $(Q)$(srctree)/scripts/remove-stale-files 12991476fee5SMasahiro Yamada 13002c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 13017d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 13027d0e5c20SMasahiro Yamada 13032c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 13042c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1305037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1306037fc336SMasahiro Yamada generic=include/asm-generic 13072c1f4f12SMasahiro Yamadauapi-asm-generic: 1308037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1309037fc336SMasahiro Yamada generic=include/uapi/asm-generic 13102c1f4f12SMasahiro Yamada 13111da177e4SLinus Torvalds# Generate some files 13121da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 13151da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvaldsuts_len := 64 131863104eecSSam Ravnborgdefine filechk_utsrelease.h 13191da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 13201da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 13211da177e4SLinus Torvalds exit 1; \ 13221da177e4SLinus Torvalds fi; \ 1323ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 13241da177e4SLinus Torvaldsendef 13251da177e4SLinus Torvalds 132663104eecSSam Ravnborgdefine filechk_version.h 13279b82f13eSSasha Levin if [ $(SUBLEVEL) -gt 255 ]; then \ 1328ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 1329207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 13309b82f13eSSasha Levin else \ 13319b82f13eSSasha Levin echo \#define LINUX_VERSION_CODE $(shell \ 1332207da4c8SMasahiro Yamada expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 13339b82f13eSSasha Levin fi; \ 13349b82f13eSSasha Levin echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 133588a68672SSasha Levin ((c) > 255 ? 255 : (c)))'; \ 133688a68672SSasha Levin echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 133788a68672SSasha Levin echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 133888a68672SSasha Levin echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 133963104eecSSam Ravnborgendef 134063104eecSSam Ravnborg 13415c816641SMasahiro Yamada$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) 13425c816641SMasahiro Yamada$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) 134343fee2b2SMasahiro Yamada$(version_h): FORCE 13441da177e4SLinus Torvalds $(call filechk,version.h) 13451da177e4SLinus Torvalds 1346273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 134763104eecSSam Ravnborg $(call filechk,utsrelease.h) 134863104eecSSam Ravnborg 1349179efcb4SVegard NossumPHONY += headerdep 1350179efcb4SVegard Nossumheaderdep: 13519663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 13529663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1353179efcb4SVegard Nossum 13541da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13558d730cfbSDavid Woodhouse# Kernel headers 13568d730cfbSDavid Woodhouse 1357e6883b18SSam Ravnborg#Default location for installed headers 1358e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1359e6883b18SSam Ravnborg 136059b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 136159b2bd05SMasahiro Yamada cmd_headers_install = \ 136259b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 136359b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 136459b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 13656d716275SDavid Woodhouse 13668d730cfbSDavid WoodhousePHONY += headers_install 136759b2bd05SMasahiro Yamadaheaders_install: headers 136859b2bd05SMasahiro Yamada $(call cmd,headers_install) 13694f193362SPaul Smith 13701da177e4SLinus TorvaldsPHONY += archheaders archscripts 13711da177e4SLinus Torvalds 1372a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 13731da177e4SLinus Torvalds 137459b2bd05SMasahiro YamadaPHONY += headers 137559b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 13761b620d53SMasahiro Yamada $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) 1377d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1378d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 13791f85712eSMike Frysinger 1380e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 138159b2bd05SMasahiro Yamadaprepare: headers 1382e949f4c2SMasahiro Yamadaendif 138368475359SDavid Woodhouse 1384bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1385bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1386bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1387bdd7714bSMasahiro Yamada 13888d730cfbSDavid Woodhouse# --------------------------------------------------------------------------- 138914ccc638SMasahiro Yamada# Install 139014ccc638SMasahiro Yamada 139114ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel. 139275ef3122SRandy Dunlap# If DKMS is installed, 'make install' will eventually recurse back 139375ef3122SRandy Dunlap# to this Makefile to build and install external modules. 139414ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 139514ccc638SMasahiro Yamada 1396f774f5bbSMasahiro Yamadaquiet_cmd_install = INSTALL $(INSTALL_PATH) 1397f774f5bbSMasahiro Yamada cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 139814ccc638SMasahiro Yamada 139914ccc638SMasahiro Yamada# --------------------------------------------------------------------------- 14001bb0b18aSMasahiro Yamada# Tools 14011bb0b18aSMasahiro Yamada 140203f16cd0SJosh Poimboeufifdef CONFIG_OBJTOOL 14030d989ac2SMasahiro Yamadaprepare: tools/objtool 14040d989ac2SMasahiro Yamadaendif 14050d989ac2SMasahiro Yamada 14060d989ac2SMasahiro Yamadaifdef CONFIG_BPF 14070d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF 14080d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids 14090d989ac2SMasahiro Yamadaendif 14100d989ac2SMasahiro Yamadaendif 14110d989ac2SMasahiro Yamada 14120d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean 14130d989ac2SMasahiro Yamada 14140d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 14150d989ac2SMasahiro Yamada 14160d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist 14170d989ac2SMasahiro Yamada# in output directory, skip its clean in that case 14180d989ac2SMasahiro Yamadaresolve_btfids_clean: 14190d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),) 14200d989ac2SMasahiro Yamada $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 14210d989ac2SMasahiro Yamadaendif 14220d989ac2SMasahiro Yamada 14231bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake 14241bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_) 14251bb0b18aSMasahiro Yamadatools_silent=s 14261bb0b18aSMasahiro Yamadaendif 14271bb0b18aSMasahiro Yamada 14281bb0b18aSMasahiro Yamadatools/: FORCE 14291bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 14301bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 14311bb0b18aSMasahiro Yamada 14321bb0b18aSMasahiro Yamadatools/%: FORCE 14331bb0b18aSMasahiro Yamada $(Q)mkdir -p $(objtree)/tools 14341bb0b18aSMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 14351bb0b18aSMasahiro Yamada 14361bb0b18aSMasahiro Yamada# --------------------------------------------------------------------------- 14375a5da78bSShuah Khan# Kernel selftest 14385a5da78bSShuah Khan 14395a5da78bSShuah KhanPHONY += kselftest 14404062eba9SGuillaume Tuckerkselftest: headers 14412bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 14425a5da78bSShuah Khan 14434062eba9SGuillaume Tuckerkselftest-%: headers FORCE 144417eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1445dcb825a9SWang Long 14463d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 14473d6dee7aSBamvor Jian Zhangkselftest-merge: 14483d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 14496d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 14506d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 14513e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 14523d6dee7aSBamvor Jian Zhang 14535a5da78bSShuah Khan# --------------------------------------------------------------------------- 145437c8a5faSRob Herring# Devicetree files 145537c8a5faSRob Herring 145637c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 145737c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 145837c8a5faSRob Herringendif 145937c8a5faSRob Herring 146037c8a5faSRob Herringifneq ($(dtstree),) 146137c8a5faSRob Herring 1462ee476203SMasahiro Yamada%.dtb: dtbs_prepare 146375e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 146437c8a5faSRob Herring 1465ee476203SMasahiro Yamada%.dtbo: dtbs_prepare 146675e89534SRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1467ce88c9c7SViresh Kumar 1468ee476203SMasahiro YamadaPHONY += dtbs dtbs_prepare dtbs_install dtbs_check 1469ee476203SMasahiro Yamadadtbs: dtbs_prepare 147037c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 147137c8a5faSRob Herring 1472ee476203SMasahiro Yamada# include/config/kernel.release is actually needed when installing DTBs because 1473ee476203SMasahiro Yamada# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make 1474ee476203SMasahiro Yamada# dtbs_install depend on it as dtbs_install may run as root. 1475ee476203SMasahiro Yamadadtbs_prepare: include/config/kernel.release scripts_dtc 1476ee476203SMasahiro Yamada 147775e89534SRob Herringifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1478e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1479b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1480b5154bf6SMasahiro Yamadaendif 1481b5154bf6SMasahiro Yamada 1482b5154bf6SMasahiro Yamadadtbs_check: dtbs 14834f0e3a57SRob Herring 148437c8a5faSRob Herringdtbs_install: 14852431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 148637c8a5faSRob Herring 148737c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 148837c8a5faSRob Herringall: dtbs 148937c8a5faSRob Herringendif 149037c8a5faSRob Herring 149137c8a5faSRob Herringendif 149237c8a5faSRob Herring 149337c8a5faSRob HerringPHONY += scripts_dtc 149437c8a5faSRob Herringscripts_dtc: scripts_basic 149537c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 149637c8a5faSRob Herring 1497e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1498e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1499e10c4321SMasahiro Yamadaendif 1500e10c4321SMasahiro Yamada 1501c473a8d0SMasahiro YamadaPHONY += dt_binding_check 15024f0e3a57SRob Herringdt_binding_check: scripts_dtc 15034f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 15044f0e3a57SRob Herring 150537c8a5faSRob Herring# --------------------------------------------------------------------------- 15061da177e4SLinus Torvalds# Modules 15071da177e4SLinus Torvalds 15081da177e4SLinus Torvaldsifdef CONFIG_MODULES 15091da177e4SLinus Torvalds 15101da177e4SLinus Torvalds# By default, build modules as well 15111da177e4SLinus Torvalds 151273d1393eSMichal Marekall: modules 15131da177e4SLinus Torvalds 15144b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider 15154b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to 15164b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them. 15174b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS 15184b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 1 15194b50c8c4SMasahiro Yamadaendif 15204b50c8c4SMasahiro Yamada 15211da177e4SLinus Torvalds# Build modules 1522551559e1STejun Heo# 1523551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1524551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1525551559e1STejun Heo# using awk while concatenating to the final file. 15261da177e4SLinus Torvalds 15274f193362SPaul SmithPHONY += modules 1528596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare 15291da177e4SLinus Torvalds 1530b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ 1531b2c88554SMasahiro Yamada 1532b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE 1533b2c88554SMasahiro Yamada $(call if_changed,modules_order) 1534b2c88554SMasahiro Yamada 1535b2c88554SMasahiro Yamadatargets += modules.order 1536a6c36632SMichal Marek 15371da177e4SLinus Torvalds# Target to prepare building external modules 15384f193362SPaul SmithPHONY += modules_prepare 1539059bc9fcSMasahiro Yamadamodules_prepare: prepare 1540596b0474SMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/module.lds 15411da177e4SLinus Torvalds 1542961ab4a3SMasahiro Yamadaexport modules_sign_only := 15431da177e4SLinus Torvalds 1544961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y) 1545961ab4a3SMasahiro YamadaPHONY += modules_sign 1546961ab4a3SMasahiro Yamadamodules_sign: modules_install 1547961ab4a3SMasahiro Yamada @: 1548961ab4a3SMasahiro Yamada 1549961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install. 1550961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 1551961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),) 1552961ab4a3SMasahiro Yamadamodules_sign_only := y 1553961ab4a3SMasahiro Yamadaendif 1554961ab4a3SMasahiro Yamadaendif 1555961ab4a3SMasahiro Yamada 1556961ab4a3SMasahiro Yamadamodinst_pre := 1557961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),) 1558961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre 1559961ab4a3SMasahiro Yamadaendif 1560961ab4a3SMasahiro Yamada 1561961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre) 15623e3005dfSMasahiro YamadaPHONY += __modinst_pre 15633e3005dfSMasahiro Yamada__modinst_pre: 15641da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 15651da177e4SLinus Torvalds @rm -f $(MODLIB)/source 15661da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 15678e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 15681da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 15691da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 15707e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 15711da177e4SLinus Torvalds fi 15721bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 15732c6d9636SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 15742c6d9636SMasahiro Yamada @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 15751da177e4SLinus Torvalds 15761da177e4SLinus Torvaldsendif # CONFIG_MODULES 15771da177e4SLinus Torvalds 15781da177e4SLinus Torvalds### 15791da177e4SLinus Torvalds# Cleaning is done on three levels. 15801da177e4SLinus Torvalds# make clean Delete most generated files 15811da177e4SLinus Torvalds# Leave enough to build external modules 15821da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 15831da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 15841da177e4SLinus Torvalds 15851da177e4SLinus Torvalds# Directories & files removed with 'make clean' 158669bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ 15873d32285fSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps \ 1588*2f7ab126SMiguel Ojeda compile_commands.json .thinlto-cache rust/test rust/doc 15891da177e4SLinus Torvalds 15901da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 15910663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 1592b0d6207bSMasahiro Yamada arch/$(SRCARCH)/include/generated .objdiff \ 15930663c68cSMasahiro Yamada debian snap tar-install \ 15940663c68cSMasahiro Yamada .config .config.old .version \ 159546457133SMasahiro Yamada Module.symvers \ 15965cca3606SMasahiro Yamada certs/signing_key.pem \ 1597b31f2a49SNayna Jain certs/x509.genkey \ 1598b31f2a49SNayna Jain vmlinux-gdb.py \ 1599*2f7ab126SMiguel Ojeda *.spec \ 1600*2f7ab126SMiguel Ojeda rust/target.json rust/libmacros.so 16011da177e4SLinus Torvalds 16021da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 16031da177e4SLinus Torvalds# 16041da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 16051da177e4SLinus Torvalds 160676cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 16071da177e4SLinus Torvalds 1608bd1ee804SPawel Mollvmlinuxclean: 1609bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1610fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1611bd1ee804SPawel Moll 161250d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean 16131da177e4SLinus Torvalds 16141da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 16151da177e4SLinus Torvalds# 16161da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1617cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 16181da177e4SLinus Torvalds 1619b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 16201da177e4SLinus Torvalds$(mrproper-dirs): 16211da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 16221da177e4SLinus Torvalds 1623b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 16241da177e4SLinus Torvalds $(call cmd,rmfiles) 1625*2f7ab126SMiguel Ojeda @find . $(RCS_FIND_IGNORE) \ 1626*2f7ab126SMiguel Ojeda \( -name '*.rmeta' \) \ 1627*2f7ab126SMiguel Ojeda -type f -print | xargs rm -f 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds# distclean 16301da177e4SLinus Torvalds# 16314f193362SPaul SmithPHONY += distclean 16321da177e4SLinus Torvalds 16331da177e4SLinus Torvaldsdistclean: mrproper 163419c8d912SMasahiro Yamada @find . $(RCS_FIND_IGNORE) \ 16351da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1636f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 16377a02cec5SMasahiro Yamada -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 16387a02cec5SMasahiro Yamada -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 16391da177e4SLinus Torvalds -type f -print | xargs rm -f 16401da177e4SLinus Torvalds 16411da177e4SLinus Torvalds 16421da177e4SLinus Torvalds# Packaging of the kernel to various formats 16431da177e4SLinus Torvalds# --------------------------------------------------------------------------- 16441da177e4SLinus Torvalds 1645bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1646000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1647031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1648000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 16491da177e4SLinus Torvalds 16501da177e4SLinus Torvalds# Brief documentation of the typical targets used 16511da177e4SLinus Torvalds# --------------------------------------------------------------------------- 16521da177e4SLinus Torvalds 16535dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1654a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 16555dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 16565dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 16571da177e4SLinus Torvalds 1658fe69b420SMasahiro YamadaPHONY += help 16591da177e4SLinus Torvaldshelp: 16601da177e4SLinus Torvalds @echo 'Cleaning targets:' 16615ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 16625cc8d246SJesper Juhl @echo ' enough build support to build external modules' 16635ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 16645cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 16651da177e4SLinus Torvalds @echo '' 16661da177e4SLinus Torvalds @echo 'Configuration targets:' 16671da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 16681da177e4SLinus Torvalds @echo '' 16691da177e4SLinus Torvalds @echo 'Other generic targets:' 16701da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 16711da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 16721da177e4SLinus Torvalds @echo '* modules - Build all modules' 16739cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 16741da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 167540ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1676433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1677433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 167862718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 167962718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1680155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1681c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 16821da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 16831da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1684f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 16853f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 16863f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 16873f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 16882fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 168959df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 16902fb9b1bdSSam Ravnborg echo '' 169131b8cc80SRandy Dunlap @echo 'Static analysers:' 16921da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1693aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1694ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1695295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 169674425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 16977f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 16986ad7cbc0SNathan Huckleberry @echo ' clang-analyzer - Check with clang static analyzer' 16996ad7cbc0SNathan Huckleberry @echo ' clang-tidy - Check with clang-tidy' 170074425eeeSNicolas Palix @echo '' 1701eb8305aeSMatthias Maennich @echo 'Tools:' 1702eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1703eb8305aeSMatthias Maennich @echo '' 170431b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1705e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 17065a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 17075a5da78bSShuah Khan @echo ' running kselftest on it' 1708e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1709e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1710e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1711dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1712e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1713e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 17145a5da78bSShuah Khan @echo '' 1715*2f7ab126SMiguel Ojeda @echo 'Rust targets:' 1716*2f7ab126SMiguel Ojeda @echo ' rustavailable - Checks whether the Rust toolchain is' 1717*2f7ab126SMiguel Ojeda @echo ' available and, if not, explains why.' 1718*2f7ab126SMiguel Ojeda @echo ' rustfmt - Reformat all the Rust code in the kernel' 1719*2f7ab126SMiguel Ojeda @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' 1720*2f7ab126SMiguel Ojeda @echo ' is formatted, printing a diff otherwise.' 1721*2f7ab126SMiguel Ojeda @echo ' rustdoc - Generate Rust documentation' 1722*2f7ab126SMiguel Ojeda @echo ' (requires kernel .config)' 1723*2f7ab126SMiguel Ojeda @echo ' rusttest - Runs the Rust tests' 1724*2f7ab126SMiguel Ojeda @echo ' (requires kernel .config; downloads external repos)' 1725*2f7ab126SMiguel Ojeda @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' 1726*2f7ab126SMiguel Ojeda @echo ' (requires kernel .config)' 1727*2f7ab126SMiguel Ojeda @echo ' dir/file.[os] - Build specified target only' 1728*2f7ab126SMiguel Ojeda @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' 1729*2f7ab126SMiguel Ojeda @echo ' Run with RUSTFMT=n to skip reformatting if needed.' 1730*2f7ab126SMiguel Ojeda @echo ' The output is not intended to be compilable.' 1731*2f7ab126SMiguel Ojeda @echo ' dir/file.ll - Build the LLVM assembly file' 1732*2f7ab126SMiguel Ojeda @echo '' 173337c8a5faSRob Herring @$(if $(dtstree), \ 173437c8a5faSRob Herring echo 'Devicetree:'; \ 173537c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 173637c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 17377aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 17387aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 173937c8a5faSRob Herring echo '') 174037c8a5faSRob Herring 174131b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 174231b8cc80SRandy Dunlap @echo ' use "make tools/help"' 174331b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 174431b8cc80SRandy Dunlap @echo '' 17451da177e4SLinus Torvalds @echo 'Kernel packaging:' 1746000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 17471da177e4SLinus Torvalds @echo '' 17481da177e4SLinus Torvalds @echo 'Documentation targets:' 1749cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 17501da177e4SLinus Torvalds @echo '' 175101dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 17525c816641SMasahiro Yamada @$(or $(archhelp),\ 175301dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 17541da177e4SLinus Torvalds @echo '' 17551da177e4SLinus Torvalds @$(if $(boards), \ 17561da177e4SLinus Torvalds $(foreach b, $(boards), \ 17574234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 17581da177e4SLinus Torvalds echo '') 17595dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 17605dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 17615dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 17625dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 17635dffbe81SSegher Boessenkool echo '') 17641da177e4SLinus Torvalds 17651da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 176645d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 17671da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1768a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1769a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1770701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1771af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1772e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 177328bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 177428bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 177528bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1776c77d06e7SYann Droneaud @echo ' e: warnings are being treated as errors' 1777a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 17781da177e4SLinus Torvalds @echo '' 17791da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 17801da177e4SLinus Torvalds @echo 'For further info see the ./README file' 17811da177e4SLinus Torvalds 17821da177e4SLinus Torvalds 17835dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 17845dffbe81SSegher Boessenkool 17855dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 17865dffbe81SSegher Boessenkool 1787fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 17885dffbe81SSegher Boessenkool 17895dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 17905dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 17915dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 17925dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 17935dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 17945dffbe81SSegher Boessenkool echo '') 17955dffbe81SSegher Boessenkool 17965dffbe81SSegher Boessenkool 17971da177e4SLinus Torvalds# Documentation targets 17981da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1799e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1800e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 180122cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1802bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1803cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 18041da177e4SLinus Torvalds 1805*2f7ab126SMiguel Ojeda 1806*2f7ab126SMiguel Ojeda# Rust targets 1807*2f7ab126SMiguel Ojeda# --------------------------------------------------------------------------- 1808*2f7ab126SMiguel Ojeda 1809*2f7ab126SMiguel Ojeda# "Is Rust available?" target 1810*2f7ab126SMiguel OjedaPHONY += rustavailable 1811*2f7ab126SMiguel Ojedarustavailable: 1812*2f7ab126SMiguel Ojeda $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!" 1813*2f7ab126SMiguel Ojeda 1814*2f7ab126SMiguel Ojeda# Documentation target 1815*2f7ab126SMiguel Ojeda# 1816*2f7ab126SMiguel Ojeda# Using the singular to avoid running afoul of `no-dot-config-targets`. 1817*2f7ab126SMiguel OjedaPHONY += rustdoc 1818*2f7ab126SMiguel Ojedarustdoc: prepare 1819*2f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 1820*2f7ab126SMiguel Ojeda 1821*2f7ab126SMiguel Ojeda# Testing target 1822*2f7ab126SMiguel OjedaPHONY += rusttest 1823*2f7ab126SMiguel Ojedarusttest: prepare 1824*2f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 1825*2f7ab126SMiguel Ojeda 1826*2f7ab126SMiguel Ojeda# Formatting targets 1827*2f7ab126SMiguel OjedaPHONY += rustfmt rustfmtcheck 1828*2f7ab126SMiguel Ojeda 1829*2f7ab126SMiguel Ojeda# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. 1830*2f7ab126SMiguel Ojeda# 1831*2f7ab126SMiguel Ojeda# We match using absolute paths since `find` does not resolve them 1832*2f7ab126SMiguel Ojeda# when matching, which is a problem when e.g. `srctree` is `..`. 1833*2f7ab126SMiguel Ojeda# We `grep` afterwards in order to remove the directory entry itself. 1834*2f7ab126SMiguel Ojedarustfmt: 1835*2f7ab126SMiguel Ojeda $(Q)find $(abs_srctree) -type f -name '*.rs' \ 1836*2f7ab126SMiguel Ojeda -o -path $(abs_srctree)/rust/alloc -prune \ 1837*2f7ab126SMiguel Ojeda -o -path $(abs_objtree)/rust/test -prune \ 1838*2f7ab126SMiguel Ojeda | grep -Fv $(abs_srctree)/rust/alloc \ 1839*2f7ab126SMiguel Ojeda | grep -Fv $(abs_objtree)/rust/test \ 1840*2f7ab126SMiguel Ojeda | grep -Fv generated \ 1841*2f7ab126SMiguel Ojeda | xargs $(RUSTFMT) $(rustfmt_flags) 1842*2f7ab126SMiguel Ojeda 1843*2f7ab126SMiguel Ojedarustfmtcheck: rustfmt_flags = --check 1844*2f7ab126SMiguel Ojedarustfmtcheck: rustfmt 1845*2f7ab126SMiguel Ojeda 1846*2f7ab126SMiguel Ojeda# IDE support targets 1847*2f7ab126SMiguel OjedaPHONY += rust-analyzer 1848*2f7ab126SMiguel Ojedarust-analyzer: 1849*2f7ab126SMiguel Ojeda $(Q)$(MAKE) $(build)=rust $@ 1850*2f7ab126SMiguel Ojeda 185167274c08SMasahiro Yamada# Misc 185267274c08SMasahiro Yamada# --------------------------------------------------------------------------- 185367274c08SMasahiro Yamada 185467274c08SMasahiro YamadaPHONY += scripts_gdb 18557a739ce5SMasahiro Yamadascripts_gdb: prepare0 18561e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 18578d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 185867274c08SMasahiro Yamada 185967274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 186067274c08SMasahiro Yamadaall: scripts_gdb 186167274c08SMasahiro Yamadaendif 186267274c08SMasahiro Yamada 18631da177e4SLinus Torvaldselse # KBUILD_EXTMOD 18641da177e4SLinus Torvalds 18651da177e4SLinus Torvalds### 18661da177e4SLinus Torvalds# External module support. 18671da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 18681da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 18691da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 187011122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used. 18711da177e4SLinus Torvalds 18726212804fSMasahiro Yamada# We are always building only modules. 18736212804fSMasahiro YamadaKBUILD_BUILTIN := 18741da177e4SLinus TorvaldsKBUILD_MODULES := 1 18751da177e4SLinus Torvalds 1876c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 18773d32285fSMasahiro Yamada$(MODORDER): descend 18783d32285fSMasahiro Yamada @: 18793d32285fSMasahiro Yamada 18807f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json 18813d32285fSMasahiro YamadaPHONY += compile_commands.json 18823d32285fSMasahiro Yamada 188376cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 18843d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ 1885dc5723b0SSami Tolvanen $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache 18861da177e4SLinus Torvalds 18876072b2c4SMasahiro YamadaPHONY += prepare 18886072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations 18896072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 18906072b2c4SMasahiro Yamadaprepare: 1891129ab0d2SMasahiro Yamada @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 18926072b2c4SMasahiro Yamada echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1893129ab0d2SMasahiro Yamada echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 18946072b2c4SMasahiro Yamada echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 18956072b2c4SMasahiro Yamada fi 18966072b2c4SMasahiro Yamada 1897fe69b420SMasahiro YamadaPHONY += help 18981da177e4SLinus Torvaldshelp: 18991da177e4SLinus Torvalds @echo ' Building external modules.' 19001da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 19011da177e4SLinus Torvalds @echo '' 19021da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 19031da177e4SLinus Torvalds @echo ' modules_install - install the module' 19041da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 19051da177e4SLinus Torvalds @echo '' 190606300b21SSam Ravnborg 1907596b0474SMasahiro Yamada# no-op for external module builds 19086072b2c4SMasahiro YamadaPHONY += modules_prepare 1909596b0474SMasahiro Yamada 19101da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 19111da177e4SLinus Torvalds 19123e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 19133e3005dfSMasahiro Yamada# Modules 19143e3005dfSMasahiro Yamada 19153e3005dfSMasahiro YamadaPHONY += modules modules_install 19163e3005dfSMasahiro Yamada 19173e3005dfSMasahiro Yamadaifdef CONFIG_MODULES 19183e3005dfSMasahiro Yamada 19191a998be6SMasahiro Yamadamodules: modules_check 19203e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 19213e3005dfSMasahiro Yamada 19221a998be6SMasahiro YamadaPHONY += modules_check 19231a998be6SMasahiro Yamadamodules_check: $(MODORDER) 19241a998be6SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 19251a998be6SMasahiro Yamada 19263ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD $(MODLIB) 19273e3005dfSMasahiro Yamada cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 19283e3005dfSMasahiro Yamada $(KERNELRELEASE) 19293e3005dfSMasahiro Yamada 19303e3005dfSMasahiro Yamadamodules_install: 19313e3005dfSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 19323e3005dfSMasahiro Yamada $(call cmd,depmod) 19333e3005dfSMasahiro Yamada 19343e3005dfSMasahiro Yamadaelse # CONFIG_MODULES 19353e3005dfSMasahiro Yamada 19363e3005dfSMasahiro Yamada# Modules not configured 19373e3005dfSMasahiro Yamada# --------------------------------------------------------------------------- 19383e3005dfSMasahiro Yamada 19393e3005dfSMasahiro Yamadamodules modules_install: 19403e3005dfSMasahiro Yamada @echo >&2 '***' 19413e3005dfSMasahiro Yamada @echo >&2 '*** The present kernel configuration has modules disabled.' 19423e3005dfSMasahiro Yamada @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' 19433e3005dfSMasahiro Yamada @echo >&2 '*** to enable CONFIG_MODULES.' 19443e3005dfSMasahiro Yamada @echo >&2 '***' 19453e3005dfSMasahiro Yamada @exit 1 19463e3005dfSMasahiro Yamada 19473e3005dfSMasahiro Yamadaendif # CONFIG_MODULES 19483e3005dfSMasahiro Yamada 1949b1fbfcb4SMasahiro Yamada# Single targets 1950b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1951b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1952b1fbfcb4SMasahiro Yamada# 1953b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1954b1fbfcb4SMasahiro Yamada# 1955b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1956b1fbfcb4SMasahiro Yamada# 1957b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1958b1fbfcb4SMasahiro Yamada# 1959b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1960b1fbfcb4SMasahiro Yamada 1961b1fbfcb4SMasahiro Yamadaifdef single-build 1962b1fbfcb4SMasahiro Yamada 1963b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1964b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1965fc93a4cdSMasahiro Yamadasingle-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 1966fc93a4cdSMasahiro Yamada $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 1967b1fbfcb4SMasahiro Yamada 1968b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost 1969b1fbfcb4SMasahiro Yamada @: 1970b1fbfcb4SMasahiro Yamada$(single-no-ko): descend 1971b1fbfcb4SMasahiro Yamada @: 1972b1fbfcb4SMasahiro Yamada 1973b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1974b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 1975b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1976b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp 1977b1fbfcb4SMasahiro Yamadaendif 1978b1fbfcb4SMasahiro Yamada 1979b1fbfcb4SMasahiro YamadaPHONY += single_modpost 1980596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare 19817f69180bSMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER) 1982b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1983b1fbfcb4SMasahiro Yamada 1984b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1 1985b1fbfcb4SMasahiro Yamada 19867f69180bSMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko)) 1987b1fbfcb4SMasahiro Yamada 1988b1fbfcb4SMasahiro Yamada# trim unrelated directories 1989b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \ 1990b1fbfcb4SMasahiro Yamada $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1991b1fbfcb4SMasahiro Yamada 1992b1fbfcb4SMasahiro Yamadaendif 1993b1fbfcb4SMasahiro Yamada 1994b480fec9SMasahiro Yamadaifndef CONFIG_MODULES 1995b480fec9SMasahiro YamadaKBUILD_MODULES := 1996b480fec9SMasahiro Yamadaendif 1997b480fec9SMasahiro Yamada 1998c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1999c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 2000c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 2001c99f3918SMasahiro Yamada# make menuconfig etc. 2002c99f3918SMasahiro Yamada# Error messages still appears in the original language 2003c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 2004c99f3918SMasahiro Yamadadescend: $(build-dirs) 2005c99f3918SMasahiro Yamada$(build-dirs): prepare 2006b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ \ 200720b1be59SMasahiro Yamada single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ 2008b1fbfcb4SMasahiro Yamada need-builtin=1 need-modorder=1 2009c99f3918SMasahiro Yamada 201076cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 201176cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 201276cd306dSMasahiro Yamada$(clean-dirs): 201376cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 201476cd306dSMasahiro Yamada 201588d7be03SMichal Marekclean: $(clean-dirs) 201688d7be03SMichal Marek $(call cmd,rmfiles) 20175c816641SMasahiro Yamada @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 2018*2f7ab126SMiguel Ojeda \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ 20194f0e3a57SRob Herring -o -name '*.ko.*' \ 2020ce88c9c7SViresh Kumar -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 2021ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 20229413e764SMasahiro Yamada -o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \ 202388d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 20249a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 20254fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 202688d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 2027b0d6207bSMasahiro Yamada -o -name '.tmp_*' \ 20286b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 2029433db3e2SVinÃcius Tinti -o -name '*.ll' \ 203038e89184SSami Tolvanen -o -name '*.gcno' \ 203138e89184SSami Tolvanen -o -name '*.*.symversions' \) -type f -print | xargs rm -f 203288d7be03SMichal Marek 20331da177e4SLinus Torvalds# Generate tags for editors 20341da177e4SLinus Torvalds# --------------------------------------------------------------------------- 2035a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 2036858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 20371da177e4SLinus Torvalds 2038f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 20391da177e4SLinus Torvalds $(call cmd,tags) 20401da177e4SLinus Torvalds 2041eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 2042eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 2043eb8305aeSMatthias Maennich 2044eb8305aeSMatthias MaennichPHONY += nsdeps 2045bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 2046eb8305aeSMatthias Maennichnsdeps: modules 2047bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 2048eb8305aeSMatthias Maennich 20493d32285fSMasahiro Yamada# Clang Tooling 20503d32285fSMasahiro Yamada# --------------------------------------------------------------------------- 20513d32285fSMasahiro Yamada 20523d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN $@ 20533d32285fSMasahiro Yamada cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 20543d32285fSMasahiro Yamada 20557f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ 20563d32285fSMasahiro Yamada $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ 20573d32285fSMasahiro Yamada $(if $(CONFIG_MODULES), $(MODORDER)) FORCE 20583d32285fSMasahiro Yamada $(call if_changed,gen_compile_commands) 20593d32285fSMasahiro Yamada 20607f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json 20613d32285fSMasahiro Yamada 20626ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer 20636ad7cbc0SNathan Huckleberry 20646ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG 20656ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK $< 20666ad7cbc0SNathan Huckleberry cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 20676ad7cbc0SNathan Huckleberry 20687f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json 20696ad7cbc0SNathan Huckleberry $(call cmd,clang_tools) 20706ad7cbc0SNathan Huckleberryelse 20716ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer: 20726ad7cbc0SNathan Huckleberry @echo "$@ requires CC=clang" >&2 20736ad7cbc0SNathan Huckleberry @false 20746ad7cbc0SNathan Huckleberryendif 20756ad7cbc0SNathan Huckleberry 20761da177e4SLinus Torvalds# Scripts to check various things for consistency 20771da177e4SLinus Torvalds# --------------------------------------------------------------------------- 20781da177e4SLinus Torvalds 20797dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report 2080279f3dd3SPeter Foley 20811da177e4SLinus Torvaldsincludecheck: 2082436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 20831da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 208480007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 20851da177e4SLinus Torvalds 20861da177e4SLinus Torvaldsversioncheck: 20872ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 20881da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 208980007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 20901da177e4SLinus Torvalds 209174425eeeSNicolas Palixcoccicheck: 2092858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 209374425eeeSNicolas Palix 2094295ac051SAdrian Bunkexport_report: 2095295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 2096295ac051SAdrian Bunk 2097c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 2098e3ccf6e3SJeff Dike 2099011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 2100011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2101011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 2102011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 2103011e3a9aSJeff Dikeifeq ($(ARCH), um) 2104011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 2105011e3a9aSJeff Dikeelse 2106011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 2107011e3a9aSJeff Dikeendif 21081da177e4SLinus Torvaldscheckstack: 21091da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 211075dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 21111da177e4SLinus Torvalds 21127b8ea53dSAmerigo Wangkernelrelease: 21137b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 211401ab1788SAmerigo Wang 2115cb58455cSSam Ravnborgkernelversion: 21162244cbd8SSam Ravnborg @echo $(KERNELVERSION) 21171da177e4SLinus Torvalds 2118c398ff00SMike Marciniszynimage_name: 2119c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 2120c398ff00SMike Marciniszyn 21211da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 21220663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 21231da177e4SLinus Torvalds 2124392885eeSMasahiro Yamada# read saved command lines for existing targets 2125392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 21261da177e4SLinus Torvalds 2127b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 21281da177e4SLinus Torvalds 212946b7c492SSZ Lin (林上智)endif # config-build 21302042b548SMasahiro Yamadaendif # mixed-build 2131688931a5SMasahiro Yamadaendif # need-sub-make 21321da177e4SLinus Torvalds 21334f193362SPaul SmithPHONY += FORCE 21341da177e4SLinus TorvaldsFORCE: 21354f193362SPaul Smith 2136bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 2137fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 21384f193362SPaul Smith.PHONY: $(PHONY) 2139