1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2bfeffd15SLinus TorvaldsVERSION = 5 3bb6d3fb3SLinus TorvaldsPATCHLEVEL = 6 455922c9dSLinus TorvaldsSUBLEVEL = 0 598d54f81SLinus TorvaldsEXTRAVERSION = -rc4 6d6d5df1dSLinus TorvaldsNAME = Kleptomaniac Octopus 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 14ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 15ba634eceSMasahiro YamadaPHONY := _all 16ba634eceSMasahiro Yamada_all: 17ba634eceSMasahiro Yamada 181da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 191da177e4SLinus Torvalds# to get the ordering right. 201da177e4SLinus Torvalds# 211da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 221da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 231da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 24f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 251da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 261da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 271da177e4SLinus Torvalds# is now up to date. 281da177e4SLinus Torvalds# 291da177e4SLinus Torvalds# The only cases where we need to modify files which have global 301da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 311da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 321da177e4SLinus Torvalds# prepare rule. 331da177e4SLinus Torvalds 34221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 353812b8c5SMasahiro Yamada 363812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 373812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 383812b8c5SMasahiro YamadaMAKEFLAGS += -rR 393812b8c5SMasahiro Yamada 403812b8c5SMasahiro Yamada# Avoid funny character set dependencies 413812b8c5SMasahiro Yamadaunexport LC_ALL 423812b8c5SMasahiro YamadaLC_COLLATE=C 433812b8c5SMasahiro YamadaLC_NUMERIC=C 443812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 453812b8c5SMasahiro Yamada 463812b8c5SMasahiro Yamada# Avoid interference with shell env settings 473812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 483812b8c5SMasahiro Yamada 49066b7ed9SMichal Marek# Beautify output 50066b7ed9SMichal Marek# --------------------------------------------------------------------------- 51066b7ed9SMichal Marek# 52066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 53066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 54066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 55066b7ed9SMichal Marek# 56066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 57066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 58066b7ed9SMichal Marek# 59066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 60066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 61066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 62066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 63066b7ed9SMichal Marek# 64066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 65066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 66066b7ed9SMichal Marek# 67066b7ed9SMichal Marek# $(Q)ln $@ :< 68066b7ed9SMichal Marek# 69066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 70066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 71505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 72066b7ed9SMichal Marek# 731da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 741da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 751da177e4SLinus Torvalds 761da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 771da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 781da177e4SLinus Torvaldsendif 791da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 801da177e4SLinus Torvalds KBUILD_VERBOSE = 0 811da177e4SLinus Torvaldsendif 821da177e4SLinus Torvalds 83066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 84066b7ed9SMichal Marek quiet = 85066b7ed9SMichal Marek Q = 86066b7ed9SMichal Marekelse 87066b7ed9SMichal Marek quiet=quiet_ 88066b7ed9SMichal Marek Q = @ 89066b7ed9SMichal Marekendif 90066b7ed9SMichal Marek 91066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 92066b7ed9SMichal Marek# commands 93066b7ed9SMichal Marek 946f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 95066b7ed9SMichal Marek quiet=silent_ 96066b7ed9SMichal Marekendif 97066b7ed9SMichal Marek 98066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 99066b7ed9SMichal Marek 10025b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 10125b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 10225b146c5SMasahiro Yamada# 10325b146c5SMasahiro Yamada# For example, you can do this: 10425b146c5SMasahiro Yamada# 10525b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 10625b146c5SMasahiro Yamada# 10725b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 10825b146c5SMasahiro Yamada# two syntaxes to specify it. 10925b146c5SMasahiro Yamada# 1101da177e4SLinus Torvalds# 1) O= 1111da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1121da177e4SLinus Torvalds# 1131da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 11425b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 11525b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1161da177e4SLinus Torvalds# 1171da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1181da177e4SLinus Torvalds# variable. 1191da177e4SLinus Torvalds 12025b146c5SMasahiro Yamada# Do we want to change the working directory? 1211da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1221da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1231da177e4SLinus Torvaldsendif 1241da177e4SLinus Torvalds 12525b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 12625b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 12725b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 12825b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 12925b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 13025b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 13125b146c5SMasahiro Yamada 13225b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 13325b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 13425b146c5SMasahiro Yamadaelse 13525b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 13625b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 13725b146c5SMasahiro Yamada 13825b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 13925b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 14025b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 14125b146c5SMasahiro Yamadaelse 14225b146c5SMasahiro Yamadaneed-sub-make := 1 14351193b76SRobert Jarzmikendif 14451193b76SRobert Jarzmik 14525b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 1461da177e4SLinus Torvalds 14725b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 14825b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 14925b146c5SMasahiro Yamadaendif 15025b146c5SMasahiro Yamada 15125b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 15280463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 15380463f1bSMasahiro Yamada# 15480463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed 15525b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make. 15625b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 157688931a5SMasahiro Yamadaneed-sub-make := 1 15825b146c5SMasahiro Yamadaendif 1593812b8c5SMasahiro Yamada 160688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 161688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 162688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 163688931a5SMasahiro Yamadaneed-sub-make := 1 164688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 165688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ; 166688931a5SMasahiro Yamadaendif 167688931a5SMasahiro Yamada 16825b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 169221cc2d2SMasahiro Yamadaexport sub_make_done := 1 170221cc2d2SMasahiro Yamada 171688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 172688931a5SMasahiro Yamada 1730b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make 1740b35786dSMilton Miller 1750209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make 17616f89098SCharles Keepax @: 1770b35786dSMilton Miller 178c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 1792e8d696bSMasahiro Yamadasub-make: 18025b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 1811da177e4SLinus Torvalds 182688931a5SMasahiro Yamadaendif # need-sub-make 183221cc2d2SMasahiro Yamadaendif # sub_make_done 184688931a5SMasahiro Yamada 1851da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 186688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 1871da177e4SLinus Torvalds 1887ff52571SMasahiro Yamada# Do not print "Entering directory ...", 1897ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 1907ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 1917ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 1927ff52571SMasahiro Yamada 193aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 194aa55c8e2SMasahiro Yamada# C compilation. 195aa55c8e2SMasahiro Yamada# 196aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 197aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 198aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not. 199aa55c8e2SMasahiro Yamada# 200036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details, 201036db11cSCao jin# including where to get the "sparse" utility. 202aa55c8e2SMasahiro Yamada 203aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line") 204aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = $(C) 205aa55c8e2SMasahiro Yamadaendif 206aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC 207aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = 0 208aa55c8e2SMasahiro Yamadaendif 209aa55c8e2SMasahiro Yamada 2107e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 2117e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 212aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line") 213aa55c8e2SMasahiro Yamada KBUILD_EXTMOD := $(M) 214aa55c8e2SMasahiro Yamadaendif 215aa55c8e2SMasahiro Yamada 216051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD 217051f278eSMasahiro Yamada 218394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 219394053f4SMasahiro Yamada 22025b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2219da0763bSMichal Marek # building in the source tree 2229da0763bSMichal Marek srctree := . 223051f278eSMasahiro Yamada building_out_of_srctree := 2249da0763bSMichal Marekelse 22525b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2269da0763bSMichal Marek # building in a subdirectory of the source tree 2279da0763bSMichal Marek srctree := .. 2289da0763bSMichal Marek else 22925b146c5SMasahiro Yamada srctree := $(abs_srctree) 2309da0763bSMichal Marek endif 231051f278eSMasahiro Yamada building_out_of_srctree := 1 2329da0763bSMichal Marekendif 2332c1f4f12SMasahiro Yamada 23495fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 23595fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 23695fd3f87SMasahiro Yamadaendif 2372c1f4f12SMasahiro Yamada 2387e1c0477SMichal Marekobjtree := . 2396b12de69SMasahiro YamadaVPATH := $(srctree) 2401da177e4SLinus Torvalds 241051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2421da177e4SLinus Torvalds 2432c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2442c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2452c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2462c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2472c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2482c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2492c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2502c1f4f12SMasahiro Yamada 2512c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2522c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h 2532c1f4f12SMasahiro Yamada 25422340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 25522340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2562c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 25759b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2589dffecc1SMasahiro Yamada %asm-generic kernelversion %src-pkg dt_binding_check 259a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \ 260a29d4d8cSMasahiro Yamada kernelrelease 261394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 2622c1f4f12SMasahiro Yamada 2632042b548SMasahiro Yamadaconfig-build := 2642042b548SMasahiro Yamadamixed-build := 2652042b548SMasahiro Yamadaneed-config := 1 266d7942413SMasahiro Yamadamay-sync-config := 1 267394053f4SMasahiro Yamadasingle-build := 2682c1f4f12SMasahiro Yamada 2692c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2702c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2712042b548SMasahiro Yamada need-config := 2722c1f4f12SMasahiro Yamada endif 2732c1f4f12SMasahiro Yamadaendif 2742c1f4f12SMasahiro Yamada 275d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 276d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 2772042b548SMasahiro Yamada may-sync-config := 278d7942413SMasahiro Yamada endif 279d7942413SMasahiro Yamadaendif 280d7942413SMasahiro Yamada 281d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 2822042b548SMasahiro Yamada may-sync-config := 283d7942413SMasahiro Yamadaendif 284d7942413SMasahiro Yamada 2852c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 2862c1f4f12SMasahiro Yamada ifneq ($(filter config %config,$(MAKECMDGOALS)),) 2872042b548SMasahiro Yamada config-build := 1 2882c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 2892042b548SMasahiro Yamada mixed-build := 1 2902c1f4f12SMasahiro Yamada endif 2912c1f4f12SMasahiro Yamada endif 2922c1f4f12SMasahiro Yamadaendif 29322340a06SMasahiro Yamada 294394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 295394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 296394053f4SMasahiro Yamada single-build := 1 297394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 298394053f4SMasahiro Yamada mixed-build := 1 299394053f4SMasahiro Yamada endif 300394053f4SMasahiro Yamadaendif 301394053f4SMasahiro Yamada 30222340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 30322340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 30422340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3052042b548SMasahiro Yamada mixed-build := 1 30622340a06SMasahiro Yamada endif 30722340a06SMasahiro Yamadaendif 30822340a06SMasahiro Yamada 3092c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3102c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3112c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3122042b548SMasahiro Yamada mixed-build := 1 3132c1f4f12SMasahiro Yamada endif 3142c1f4f12SMasahiro Yamadaendif 3152c1f4f12SMasahiro Yamada 3162042b548SMasahiro Yamadaifdef mixed-build 3172c1f4f12SMasahiro Yamada# =========================================================================== 3182c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3192c1f4f12SMasahiro Yamada# Handle them one by one. 3202c1f4f12SMasahiro Yamada 3212c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3222c1f4f12SMasahiro Yamada 3232c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 3242c1f4f12SMasahiro Yamada @: 3252c1f4f12SMasahiro Yamada 3262c1f4f12SMasahiro Yamada__build_one_by_one: 3272c1f4f12SMasahiro Yamada $(Q)set -e; \ 3282c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3292c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3302c1f4f12SMasahiro Yamada done 3312c1f4f12SMasahiro Yamada 3322042b548SMasahiro Yamadaelse # !mixed-build 3332c1f4f12SMasahiro Yamada 3342c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include 3352c1f4f12SMasahiro Yamada 3362c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3372c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 3382c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3392c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3402c1f4f12SMasahiro Yamada 341b2d35fa5SAnders Roxellinclude scripts/subarch.include 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3441da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3451da177e4SLinus Torvalds# 3461da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3471da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3481da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3491da177e4SLinus Torvalds# make ARCH=ia64 3501da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3511da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3541da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3551da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3561da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3571da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3581da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3591da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3601da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3612331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds# Architecture as present in compile.h 3641da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3656752ed90SThomas GleixnerSRCARCH := $(ARCH) 3661da177e4SLinus Torvalds 367d746d647SSam Ravnborg# Additional ARCH settings for x86 368d746d647SSam Ravnborgifeq ($(ARCH),i386) 369d746d647SSam Ravnborg SRCARCH := x86 370d746d647SSam Ravnborgendif 371d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 372d746d647SSam Ravnborg SRCARCH := x86 373d746d647SSam Ravnborgendif 37474b469f2SSam Ravnborg 3755e538790SSam Ravnborg# Additional ARCH settings for sparc 376e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 377e69f58c0SNamhyung Kim SRCARCH := sparc 378e69f58c0SNamhyung Kimendif 379a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 3805e538790SSam Ravnborg SRCARCH := sparc 381a439fe51SSam Ravnborgendif 3822fb9b1bdSSam Ravnborg 3833cc000b5SPaul Mundt# Additional ARCH settings for sh 3843cc000b5SPaul Mundtifeq ($(ARCH),sh64) 3853cc000b5SPaul Mundt SRCARCH := sh 3863cc000b5SPaul Mundtendif 3873cc000b5SPaul Mundt 38814cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 38941263fc6SBen Gardinerexport KCONFIG_CONFIG 39014cdd3c4SRoman Zippel 3912a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile. 3922a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig 3932a86f661SMasahiro Yamada 3941da177e4SLinus Torvalds# SHELL used by kbuild 395858805b3SMasahiro YamadaCONFIG_SHELL := sh 3961da177e4SLinus Torvalds 3976d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 3986d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 3996d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 400d7f14c66SUwe Kleine-König 4011da177e4SLinus TorvaldsHOSTCC = gcc 4021da177e4SLinus TorvaldsHOSTCXX = g++ 40396f14fe7SLaura AbbottKBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 404f92d19e0SLaura Abbott -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 405f92d19e0SLaura Abbott $(HOSTCFLAGS) 406f92d19e0SLaura AbbottKBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 407f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 408f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds# Make variables (CC, etc...) 4111da177e4SLinus TorvaldsAS = $(CROSS_COMPILE)as 4121da177e4SLinus TorvaldsLD = $(CROSS_COMPILE)ld 4131da177e4SLinus TorvaldsCC = $(CROSS_COMPILE)gcc 4141da177e4SLinus TorvaldsCPP = $(CC) -E 4151da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4161da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4171da177e4SLinus TorvaldsSTRIP = $(CROSS_COMPILE)strip 4181da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4191da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 4207bac9870SVasily GorbikOBJSIZE = $(CROSS_COMPILE)size 421eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 422e83b9f55SAndrii NakryikoPAHOLE = pahole 42373a4f6dbSMasahiro YamadaLEX = flex 42473a4f6dbSMasahiro YamadaYACC = bison 4251da177e4SLinus TorvaldsAWK = awk 426caa27b66SSam RavnborgINSTALLKERNEL := installkernel 4271da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 4281da177e4SLinus TorvaldsPERL = perl 429011bf125SMasahiro YamadaPYTHON = python 430e9781b52SMasahiro YamadaPYTHON3 = python3 4311da177e4SLinus TorvaldsCHECK = sparse 432858805b3SMasahiro YamadaBASH = bash 4331da177e4SLinus Torvalds 43480a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 4356c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 4360c22be07SDouglas AndersonNOSTDINC_FLAGS := 4376588169dSSam RavnborgCFLAGS_MODULE = 4386588169dSSam RavnborgAFLAGS_MODULE = 4396588169dSSam RavnborgLDFLAGS_MODULE = 4401da177e4SLinus TorvaldsCFLAGS_KERNEL = 4411da177e4SLinus TorvaldsAFLAGS_KERNEL = 442b36fad65SMichal MarekLDFLAGS_vmlinux = 4431da177e4SLinus Torvalds 444abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 445abbf1590SDavid HowellsUSERINCLUDE := \ 4469d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 4479d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 448abbf1590SDavid Howells -I$(srctree)/include/uapi \ 4493308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 450abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 451abbf1590SDavid Howells 4521da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 4531da177e4SLinus Torvalds# Needed to be compatible with the O= option 454abbf1590SDavid HowellsLINUXINCLUDE := \ 4559d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 4569d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 457051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 458f8224f7fSMasahiro Yamada -I$(objtree)/include \ 459f8224f7fSMasahiro Yamada $(USERINCLUDE) 4601da177e4SLinus Torvalds 46142a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 462eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 46342a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 464b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 46551b97e35SKirill A. Shutemov -Wno-format-security \ 466433dc2ebSMasahiro Yamada -std=gnu89 467433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 46880c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 46980c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 4706588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 4716588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 47210df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 47310df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds 474d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 475433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS := 4765241ab4cSMasahiro YamadaCLANG_FLAGS := 4771da177e4SLinus Torvalds 478858805b3SMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 479eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL 48094f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 4817bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 4821da177e4SLinus Torvalds 483d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 4840e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 4850e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 486222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 4876588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 48880c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds# Files to ignore in find ... statements 4911da177e4SLinus Torvalds 492ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 493ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 494ae63b2d7SPrarit Bhargava -prune -o 495450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 496450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds# =========================================================================== 4991da177e4SLinus Torvalds# Rules shared between *config targets and build targets 5001da177e4SLinus Torvalds 501312a3d09SCao jin# Basic helpers built in scripts/basic/ 5024f193362SPaul SmithPHONY += scripts_basic 5031da177e4SLinus Torvaldsscripts_basic: 5041da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 505638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 5061da177e4SLinus Torvalds 5074f193362SPaul SmithPHONY += outputmakefile 508e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 509fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 510fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 511fd5f0cd6SJan Beulich# output directory. 5123a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 5133a51ff34SVladimir Kondratiev# ignore whole output directory 5141da177e4SLinus Torvaldsoutputmakefile: 515051f278eSMasahiro Yamadaifdef building_out_of_srctree 516e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 517e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 518e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 519e8e83a23SMasahiro Yamada echo >&2 "***"; \ 520e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 521e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 522e8e83a23SMasahiro Yamada echo >&2 "***"; \ 523e8e83a23SMasahiro Yamada false; \ 524e8e83a23SMasahiro Yamada fi 52592979997SAndi Kleen $(Q)ln -fsn $(srctree) source 5264fd61277SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 527156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 528156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 529fd5f0cd6SJan Beulichendif 5301da177e4SLinus Torvalds 53199516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 532ae6b289aSChris Friesifneq ($(CROSS_COMPILE),) 5335241ab4cSMasahiro YamadaCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 534ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 535238bcbc4SMasahiro YamadaCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 536ef8c4ed9SStefan AgnerGCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 537ae6b289aSChris Friesendif 538ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),) 539238bcbc4SMasahiro YamadaCLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 540ae6b289aSChris Friesendif 541876a0600SNathan Chancellorifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) 542238bcbc4SMasahiro YamadaCLANG_FLAGS += -no-integrated-as 543876a0600SNathan Chancellorendif 544589834b3SNathan ChancellorCLANG_FLAGS += -Werror=unknown-warning-option 545238bcbc4SMasahiro YamadaKBUILD_CFLAGS += $(CLANG_FLAGS) 546238bcbc4SMasahiro YamadaKBUILD_AFLAGS += $(CLANG_FLAGS) 5473bd98050SJoel Stanleyexport CLANG_FLAGS 548ae6b289aSChris Friesendif 549ae6b289aSChris Fries 550315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 551315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 552315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 553315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade. 554902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 555315bab4eSMasahiro Yamada 5562042b548SMasahiro Yamadaifdef config-build 5571da177e4SLinus Torvalds# =========================================================================== 5581da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 5591da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 5621da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 5631da177e4SLinus Torvalds# used for 'make defconfig' 564a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 565315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 5661da177e4SLinus Torvalds 56736de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 56831110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 56931110ebbSSam Ravnborg 57036de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 5711da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 5721da177e4SLinus Torvalds 5732042b548SMasahiro Yamadaelse #!config-build 5741da177e4SLinus Torvalds# =========================================================================== 5751da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 5761da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 5771da177e4SLinus Torvalds 5782c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 5792c1f4f12SMasahiro Yamada# but instead _all depend on modules 5802c1f4f12SMasahiro YamadaPHONY += all 5812c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 5822c1f4f12SMasahiro Yamada_all: all 5832c1f4f12SMasahiro Yamadaelse 5842c1f4f12SMasahiro Yamada_all: modules 5852c1f4f12SMasahiro Yamadaendif 5862c1f4f12SMasahiro Yamada 5872c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 5882c1f4f12SMasahiro Yamada# Normally, just do built-in. 5892c1f4f12SMasahiro Yamada 5902c1f4f12SMasahiro YamadaKBUILD_MODULES := 5912c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 5922c1f4f12SMasahiro Yamada 5932c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 5942c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider 5952c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to 5962c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them. 5972c1f4f12SMasahiro Yamada 5982c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 5992c1f4f12SMasahiro Yamada KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 6002c1f4f12SMasahiro Yamadaendif 6012c1f4f12SMasahiro Yamada 6022c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 6032c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 6042c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 6052c1f4f12SMasahiro Yamada 606d85103acSMasahiro Yamadaifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),) 6072c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6082c1f4f12SMasahiro Yamadaendif 6092c1f4f12SMasahiro Yamada 6102c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 6112c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6122c1f4f12SMasahiro Yamadaendif 6132c1f4f12SMasahiro Yamada 6142c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 6152c1f4f12SMasahiro Yamada 6162042b548SMasahiro Yamadaifdef need-config 617d93a18f2SMasahiro Yamadainclude include/config/auto.conf 618d93a18f2SMasahiro Yamadaendif 619d93a18f2SMasahiro Yamada 6201da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 6211da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 6221da177e4SLinus Torvaldsinit-y := init/ 623f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 624d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 6251da177e4SLinus Torvaldsnet-y := net/ 6261da177e4SLinus Torvaldslibs-y := lib/ 6271da177e4SLinus Torvaldscore-y := usr/ 62837d9fe47SFeng Wuvirt-y := virt/ 6291da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 6301da177e4SLinus Torvalds 631315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 632315bab4eSMasahiro Yamada# command line. 633315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 634315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 635315bab4eSMasahiro Yamadaall: vmlinux 636315bab4eSMasahiro Yamada 637315bab4eSMasahiro YamadaCFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 638315bab4eSMasahiro Yamada $(call cc-option,-fno-tree-loop-im) \ 639315bab4eSMasahiro Yamada $(call cc-disable-warning,maybe-uninitialized,) 6405aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 641315bab4eSMasahiro Yamada 642b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 643b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 644b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 645b1f4ff74SPaulo Zanoniendif 646b1f4ff74SPaulo Zanoni 647669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 648669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 649669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 650669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 651669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 652669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 653669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS 654669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS 655669e06b1SMasahiro Yamada 656315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 657315bab4eSMasahiro Yamada 6582042b548SMasahiro Yamadaifdef need-config 6592042b548SMasahiro Yamadaifdef may-sync-config 660315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 661315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 662315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 663d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 6641da177e4SLinus Torvalds 66505850719SMasahiro Yamada$(KCONFIG_CONFIG): 66605850719SMasahiro Yamada @echo >&2 '***' 66705850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 66805850719SMasahiro Yamada @echo >&2 '***' 66905850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 67005850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 67105850719SMasahiro Yamada @echo >&2 '***' 67205850719SMasahiro Yamada @/bin/false 6731da177e4SLinus Torvalds 67461277981SUlf Magnusson# The actual configuration files used during the build are stored in 67561277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 67661277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 6779390dff6SMasahiro Yamada# 6789390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 6799390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 6808b41fc44SMasahiro Yamada%/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG) 681911a91c3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 6822042b548SMasahiro Yamadaelse # !may-sync-config 683d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 684d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 685d7942413SMasahiro Yamada# Use auto.conf to trigger the test 6869ee4e336SSam RavnborgPHONY += include/config/auto.conf 6879ee4e336SSam Ravnborg 6889ee4e336SSam Ravnborginclude/config/auto.conf: 689264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 6905369f550SMichal Marek echo >&2; \ 6915369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 6925369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 6935369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 6945369f550SMichal Marek echo >&2 ; \ 6959ee4e336SSam Ravnborg /bin/false) 6969ee4e336SSam Ravnborg 697d7942413SMasahiro Yamadaendif # may-sync-config 6982042b548SMasahiro Yamadaendif # need-config 6991da177e4SLinus Torvalds 700a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 701ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 702bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 703bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 7046f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 705a1c48bb1SGeert Uytterhoeven 70615f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 707a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 70815f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 70915f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3 71015f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 71115f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 7121da177e4SLinus Torvaldsendif 7131da177e4SLinus Torvalds 714b303c6dfSMasahiro Yamadaifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 715b303c6dfSMasahiro YamadaKBUILD_CFLAGS += -Wno-maybe-uninitialized 716b303c6dfSMasahiro Yamadaendif 717a76bcf55SArnd Bergmann 71869102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 71969102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 720*b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 72169102311SJiri Kosina 722d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov 7236b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins 7246b90bd4bSEmese Revfy 7251873e870SAndi Kleenifdef CONFIG_READABLE_ASM 7261873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 7271873e870SAndi Kleen# reorder blocks reorders the control in the function 7281873e870SAndi Kleen# ipa clone creates specialized cloned functions 7291873e870SAndi Kleen# partial inlining inlines only parts of functions 7301873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 7311873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 7321873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 7331873e870SAndi Kleenendif 7341873e870SAndi Kleen 73508f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 736a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 73735bb5b1eSAndi Kleenendif 73835bb5b1eSAndi Kleen 7392a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 740050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 741050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 7422a61f474SMasahiro Yamada 7432a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 744e06b8b98SSam Ravnborg 745076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 746a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 747a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier 748a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 749cfe17c9bSMasahiro Yamada# Quiet clang warning: comparison of unsigned expression < 0 is always false 750a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-tautological-compare 751cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 752cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names. 753cfe17c9bSMasahiro Yamada# See modpost pattern 2 754a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge 755cfe17c9bSMasahiro Yamadaelse 756cfe17c9bSMasahiro Yamada 757cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build. 758cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 7599df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable 760e2079e93SNathan Chancellor 761e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement. 762e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and 763e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 764e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 765cfe17c9bSMasahiro Yamadaendif 766cfe17c9bSMasahiro Yamada 7670a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 7681da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 769a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 7701da177e4SLinus Torvaldselse 7717e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 7727e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 7737e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 7747e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 7757e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 7767e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 777a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 7781da177e4SLinus Torvaldsendif 7797e9501fdSRabin Vincentendif 7801da177e4SLinus Torvalds 781709a972eSKees Cook# Initialize all stack variables with a pattern, if desired. 782709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL 783709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 784709a972eSKees Cookendif 785709a972eSKees Cook 7861e88e415SMasahiro YamadaDEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 7872062afb4SLinus Torvalds 7881da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 789866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 7909d937444SMasahiro YamadaDEBUG_CFLAGS += -gsplit-dwarf 791866ced95SAndi Kleenelse 7921e88e415SMasahiro YamadaDEBUG_CFLAGS += -g 793866ced95SAndi Kleenendif 7942288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 7951da177e4SLinus Torvaldsendif 796bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 7979d937444SMasahiro YamadaDEBUG_CFLAGS += -gdwarf-4 798bfaf2dd3SAndi Kleenendif 7991da177e4SLinus Torvalds 800d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 8011e88e415SMasahiro YamadaDEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 802e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 803d6f4ceb7SAndi Kleenendif 804d6f4ceb7SAndi Kleen 8051e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS) 8061e88e415SMasahiro Yamadaexport DEBUG_CFLAGS 8071e88e415SMasahiro Yamada 808606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 80907d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD 81007d04081SVasily Gorbik # gcc 5 supports generating the mcount tables directly 81107d04081SVasily Gorbik ifeq ($(call cc-option-yn,-mrecord-mcount),y) 81207d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 81307d04081SVasily Gorbik export CC_USING_RECORD_MCOUNT := 1 814a2546faeSSteven Rostedt endif 8152f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 8162f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 8172f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 8182f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 8192f4df001SVasily Gorbik endif 8202f4df001SVasily Gorbik endif 82107d04081SVasily Gorbikendif 822a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 823f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 824f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 825f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 826a2546faeSSteven Rostedt endif 827f28bc3c3SVasily Gorbikendif 828f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 829f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 830f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 83172441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 832cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 83372441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 83472441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 83572441cb1SSteven Rostedt endif 83672441cb1SSteven Rostedtendif 83716444a8aSArnaldo Carvalho de Meloendif 83816444a8aSArnaldo Carvalho de Melo 83991341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 84091341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 84191341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 84291341d4bSSam Ravnborgendif 84391341d4bSSam Ravnborg 84490ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 845e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 846e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 84790ad4052SMasahiro Yamadaendif 84890ad4052SMasahiro Yamada 84943bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH 85043bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 85143bd3a95SMiroslav Benesendif 85243bd3a95SMiroslav Benes 853e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 854e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 855e8e69931SSam Ravnborg 8561da177e4SLinus Torvalds# warn about C99 declaration after statement 857a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 8581da177e4SLinus Torvalds 8590bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 8608289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 8610bb95f80SKees Cook 862070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 863fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 8641da177e4SLinus Torvalds 865217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 866217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 867217c3e01SStephen Rothwell 868fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 869a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 870d0115552SLinus Torvalds 87187e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this 87287e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we 87387e0d4f0SDaniel Borkmann# need to disable it here generally. 87487e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 87587e0d4f0SDaniel Borkmann 87687e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine 87787e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled. 87887e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 87987e0d4f0SDaniel Borkmann 8803ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 8813ce120b1SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 8823ce120b1SLinus Torvalds 8838f7f5c9fSAndi Kleen# conserve stack if available 8848f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 8858f7f5c9fSAndi Kleen 886fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 887fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 888fe7c36c7SJosh Triplett 889ea8daa7bSDaniel Wagner# enforce correct pointer usage 890ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 891ea8daa7bSDaniel Wagner 892c834f0e8SKees Cook# Require designated initializers for all marked structures 893c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 894c834f0e8SKees Cook 895a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 896a73619a8SMasahiro YamadaKBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 897a73619a8SMasahiro Yamada 89829be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is 89929be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern 90029be86d7SSeth Forsheeifdef CONFIG_RETPOLINE 90129be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 90229be86d7SSeth Forsheeendif 90329be86d7SSeth Forshee 904a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan 905a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn 906c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan 907a86fe353SMasahiro Yamada 9088cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 9098cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 9108cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 9118cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 91252bcc330SSam Ravnborg 91389ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id 91489ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id 91518991197SRoland McGrath 9165d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 917d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 9185d7d18f5SDavid Howellsendif 9195d7d18f5SDavid Howells 9205cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 9215cf896fbSPeter CollingbourneLDFLAGS_vmlinux += --pack-dyn-relocs=relr 9225cf896fbSPeter Collingbourneendif 9235cf896fbSPeter Collingbourne 92480591e61SLuc Van Oostenryck# make the checker run with the right architecture 92580591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 92680591e61SLuc Van Oostenryck 92714516765SLuc Van Oostenryck# insure the checker run with the right endianness 92814516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 92914516765SLuc Van Oostenryck 9301f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 9311f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 9321f2f01b1SLuc Van Oostenryck 9331da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 9341da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 9351da177e4SLinus Torvalds# set in the environment 9361da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 9371da177e4SLinus Torvalds# this default value 9381da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 9391da177e4SLinus Torvalds 9401da177e4SLinus Torvalds# 9411da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 9421da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 9431da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds# 946f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 947f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 948f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 949f4d4ffc0SJason Cooper# 950f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 951f4d4ffc0SJason Cooper 952f4d4ffc0SJason Cooper# 9531da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 9541da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 955070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 9561da177e4SLinus Torvalds# 9571da177e4SLinus Torvalds 958df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 9591da177e4SLinus Torvaldsexport MODLIB 9601da177e4SLinus Torvalds 961ac031f26STheodore Ts'o# 9622ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 9632ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 9642ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 965177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 9662ea03891SSam Ravnborg 967ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 968ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 9692ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 970ac031f26STheodore Ts'oelse 9712ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 972ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 973ac031f26STheodore Ts'oelse 9742ea03891SSam Ravnborgmod_strip_cmd = true 975ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 976ac031f26STheodore Ts'oexport mod_strip_cmd 977ac031f26STheodore Ts'o 978beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 979beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 980beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ. 981beb50df3SBertrand Jacquin 982beb50df3SBertrand Jacquinmod_compress_cmd = true 983beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS 984beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_GZIP 9853d1450d5SJason A. Donenfeld mod_compress_cmd = gzip -n -f 986beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_GZIP 987beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_XZ 9883d1450d5SJason A. Donenfeld mod_compress_cmd = xz -f 989beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_XZ 990beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS 991beb50df3SBertrand Jacquinexport mod_compress_cmd 992beb50df3SBertrand Jacquin 993d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 9943ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY)) 9953ee550f1SDavid Woodhouse 9963ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 997e2a666d5SRusty Russellelse 998e2a666d5SRusty Russellmod_sign_cmd = true 999e2a666d5SRusty Russellendif 1000e2a666d5SRusty Russellexport mod_sign_cmd 1001e2a666d5SRusty Russell 1002056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 1003056d28d1SRolf Eike Beer 10049f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION 10059f0c18aeSJosh Poimboeuf has_libelf := $(call try-run,\ 1006056d28d1SRolf Eike Beer echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 10079f0c18aeSJosh Poimboeuf ifeq ($(has_libelf),1) 10089f0c18aeSJosh Poimboeuf objtool_target := tools/objtool FORCE 10099f0c18aeSJosh Poimboeuf else 10109f0c18aeSJosh Poimboeuf SKIP_STACK_VALIDATION := 1 10119f0c18aeSJosh Poimboeuf export SKIP_STACK_VALIDATION 10129f0c18aeSJosh Poimboeuf endif 10139f0c18aeSJosh Poimboeufendif 10149f0c18aeSJosh Poimboeuf 1015e00d8880SMasahiro YamadaPHONY += prepare0 1016e2a666d5SRusty Russell 1017394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order 1018bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps 101947801c97SMasahiro Yamada 10201da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1021cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvaldsvmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 10241da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 102537d9fe47SFeng Wu $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 10261da177e4SLinus Torvalds 10271eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 10281eaca4b9SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 10291eaca4b9SMasahiro Yamada $(drivers-) $(net-) $(libs-) $(virt-)))) 10301da177e4SLinus Torvalds 1031c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 103276cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1033c99f3918SMasahiro Yamada 1034f49821eeSNicholas Piggininit-y := $(patsubst %/, %/built-in.a, $(init-y)) 1035f49821eeSNicholas Piggincore-y := $(patsubst %/, %/built-in.a, $(core-y)) 1036f49821eeSNicholas Piggindrivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1037f49821eeSNicholas Pigginnet-y := $(patsubst %/, %/built-in.a, $(net-y)) 10381da177e4SLinus Torvaldslibs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1039f49821eeSNicholas Pigginlibs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 1040f49821eeSNicholas Pigginvirt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 10411da177e4SLinus Torvalds 10421f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1043d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1044d151e971SMasahiro Yamada $(drivers-y) $(net-y) $(virt-y) 10453a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1) 104695698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 10471f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 104885f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1049233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 10501da177e4SLinus Torvalds 1051d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 10521da177e4SLinus Torvalds 10533fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 10543fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 10552441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 1056c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order 1057ba79d401SNicolas Ferre $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 105886556392SNicolas Pitre "$(MAKE) -f $(srctree)/Makefile vmlinux" 10592441e78bSNicolas Pitreendif 106023121ca2SNicolas Pitre 10611f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 10621f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 10631f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 10641f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS 10651f50b80aSMasahiro Yamada KBUILD_MODULES := 1 10661f50b80aSMasahiro Yamadaendif 10671f50b80aSMasahiro Yamada 106807a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 106907a422bbSMasahiro Yamada 107088694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 107188694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 107288694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 107388694cffSQuentin Perret 107407a422bbSMasahiro Yamada$(autoksyms_h): 107588694cffSQuentin Perret $(call cmd,autoksyms_h) 107623121ca2SNicolas Pitre 1077fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1078fbe6e37dSNicholas Piggin 1079fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1080fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 1081d503ac53SMasahiro Yamada $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1082fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 10832441e78bSNicolas Pitre 10843fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 10851f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 1086741f98feSSam Ravnborg 1087392885eeSMasahiro Yamadatargets := vmlinux 1088392885eeSMasahiro Yamada 10891da177e4SLinus Torvalds# The actual objects are generated when descending, 10901da177e4SLinus Torvalds# make sure no implicit rule kicks in 1091c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ; 10921da177e4SLinus Torvalds 1093ba97df45SMasahiro Yamadafilechk_kernel.release = \ 10940d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 10950d0e7718SMichal Marek 109683a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 109724512795SMasahiro Yamadainclude/config/kernel.release: FORCE 10980d0e7718SMichal Marek $(call filechk,kernel.release) 1099cb58455cSSam Ravnborg 1100d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1101d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1102d8821622SMasahiro Yamada# in parallel 1103d8821622SMasahiro YamadaPHONY += scripts 110460df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1105d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1106cb58455cSSam Ravnborg 11071da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 11085bb78269SSam Ravnborg# or the modules are listed in "prepare". 11095bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 11105bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 11115bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 11121da177e4SLinus Torvalds 1113a5139fb3SMasahiro YamadaPHONY += prepare archprepare 11145bb78269SSam Ravnborg 111536de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 111630527cefSMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h 11175bb78269SSam Ravnborg 111865bba042SMasahiro Yamadaprepare0: archprepare 111960df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 11208d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 112186feeaa8SSam Ravnborg 11221da177e4SLinus Torvalds# All the preparing.. 1123b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool 1124b9ab5ebbSJosh Poimboeuf 11252c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 11267d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 11277d0e5c20SMasahiro Yamada 11282c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 11292c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1130037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1131037fc336SMasahiro Yamada generic=include/asm-generic 11322c1f4f12SMasahiro Yamadauapi-asm-generic: 1133037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1134037fc336SMasahiro Yamada generic=include/uapi/asm-generic 11352c1f4f12SMasahiro Yamada 1136b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool 11373b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 1138ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1) 1139ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC 1140ef7cfd00SMasahiro Yamada @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1141ef7cfd00SMasahiro Yamada @false 1142ef7cfd00SMasahiro Yamadaelse 1143ef7cfd00SMasahiro Yamada @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1144ef7cfd00SMasahiro Yamadaendif 1145ef7cfd00SMasahiro Yamadaendif 11461da177e4SLinus Torvalds 11471da177e4SLinus Torvalds# Generate some files 11481da177e4SLinus Torvalds# --------------------------------------------------------------------------- 11491da177e4SLinus Torvalds 11501da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 11511da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 11521da177e4SLinus Torvalds 11531da177e4SLinus Torvaldsuts_len := 64 115463104eecSSam Ravnborgdefine filechk_utsrelease.h 11551da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 11561da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 11571da177e4SLinus Torvalds exit 1; \ 11581da177e4SLinus Torvalds fi; \ 1159ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 11601da177e4SLinus Torvaldsendef 11611da177e4SLinus Torvalds 116263104eecSSam Ravnborgdefine filechk_version.h 1163ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 116478d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1165ad774086SMasahiro Yamada echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 116663104eecSSam Ravnborgendef 116763104eecSSam Ravnborg 116843fee2b2SMasahiro Yamada$(version_h): FORCE 11691da177e4SLinus Torvalds $(call filechk,version.h) 1170223c24a7SMichal Marek $(Q)rm -f $(old_version_h) 11711da177e4SLinus Torvalds 1172273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 117363104eecSSam Ravnborg $(call filechk,utsrelease.h) 117463104eecSSam Ravnborg 1175179efcb4SVegard NossumPHONY += headerdep 1176179efcb4SVegard Nossumheaderdep: 11779663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 11789663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1179179efcb4SVegard Nossum 11801da177e4SLinus Torvalds# --------------------------------------------------------------------------- 11818d730cfbSDavid Woodhouse# Kernel headers 11828d730cfbSDavid Woodhouse 1183e6883b18SSam Ravnborg#Default location for installed headers 1184e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1185e6883b18SSam Ravnborg 118659b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 118759b2bd05SMasahiro Yamada cmd_headers_install = \ 118859b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 118959b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 119059b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 11916d716275SDavid Woodhouse 11928d730cfbSDavid WoodhousePHONY += headers_install 119359b2bd05SMasahiro Yamadaheaders_install: headers 119459b2bd05SMasahiro Yamada $(call cmd,headers_install) 11954f193362SPaul Smith 11961da177e4SLinus TorvaldsPHONY += archheaders archscripts 11971da177e4SLinus Torvalds 1198a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 11991da177e4SLinus Torvalds 120059b2bd05SMasahiro YamadaPHONY += headers 120159b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 12029d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 12032fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1204d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1205d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 12061f85712eSMike Frysinger 12077ecaf069SMasahiro Yamada# Deprecated. It is no-op now. 120868475359SDavid WoodhousePHONY += headers_check 12097ecaf069SMasahiro Yamadaheaders_check: 12107ecaf069SMasahiro Yamada @: 121168475359SDavid Woodhouse 1212e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 121359b2bd05SMasahiro Yamadaprepare: headers 1214e949f4c2SMasahiro Yamadaendif 12151da177e4SLinus Torvalds 1216bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1217bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1218bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1219bdd7714bSMasahiro Yamada 12201da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12215a5da78bSShuah Khan# Kernel selftest 12225a5da78bSShuah Khan 12235a5da78bSShuah KhanPHONY += kselftest 12245a5da78bSShuah Khankselftest: 12252bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 12265a5da78bSShuah Khan 122717eac6c2SShuah Khankselftest-%: FORCE 122817eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1229dcb825a9SWang Long 12303d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 12313d6dee7aSBamvor Jian Zhangkselftest-merge: 12323d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 12336d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 12346d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 12353e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 12363d6dee7aSBamvor Jian Zhang 12375a5da78bSShuah Khan# --------------------------------------------------------------------------- 123837c8a5faSRob Herring# Devicetree files 123937c8a5faSRob Herring 124037c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 124137c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 124237c8a5faSRob Herringendif 124337c8a5faSRob Herring 124437c8a5faSRob Herringifneq ($(dtstree),) 124537c8a5faSRob Herring 1246a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc 124737c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 124837c8a5faSRob Herring 1249c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check 1250b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc 125137c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 125237c8a5faSRob Herring 1253b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1254e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1255b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1256b5154bf6SMasahiro Yamadaendif 1257b5154bf6SMasahiro Yamada 1258b5154bf6SMasahiro Yamadadtbs_check: dtbs 12594f0e3a57SRob Herring 126037c8a5faSRob Herringdtbs_install: 126137c8a5faSRob Herring $(Q)$(MAKE) $(dtbinst)=$(dtstree) 126237c8a5faSRob Herring 126337c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 126437c8a5faSRob Herringall: dtbs 126537c8a5faSRob Herringendif 126637c8a5faSRob Herring 126737c8a5faSRob Herringendif 126837c8a5faSRob Herring 126937c8a5faSRob HerringPHONY += scripts_dtc 127037c8a5faSRob Herringscripts_dtc: scripts_basic 127137c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 127237c8a5faSRob Herring 1273e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1274e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1275e10c4321SMasahiro Yamadaendif 1276e10c4321SMasahiro Yamada 1277c473a8d0SMasahiro YamadaPHONY += dt_binding_check 12784f0e3a57SRob Herringdt_binding_check: scripts_dtc 12794f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 12804f0e3a57SRob Herring 128137c8a5faSRob Herring# --------------------------------------------------------------------------- 12821da177e4SLinus Torvalds# Modules 12831da177e4SLinus Torvalds 12841da177e4SLinus Torvaldsifdef CONFIG_MODULES 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds# By default, build modules as well 12871da177e4SLinus Torvalds 128873d1393eSMichal Marekall: modules 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds# Build modules 1291551559e1STejun Heo# 1292551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1293551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1294551559e1STejun Heo# using awk while concatenating to the final file. 12951da177e4SLinus Torvalds 12964f193362SPaul SmithPHONY += modules 12978b41fc44SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order 1298b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 12993a48a919SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 13001da177e4SLinus Torvalds 1301c99f3918SMasahiro Yamadamodules.order: descend 1302c99f3918SMasahiro Yamada $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1303a6c36632SMichal Marek 13041da177e4SLinus Torvalds# Target to prepare building external modules 13054f193362SPaul SmithPHONY += modules_prepare 1306059bc9fcSMasahiro Yamadamodules_prepare: prepare 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds# Target to install modules 13094f193362SPaul SmithPHONY += modules_install 13101da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 13111da177e4SLinus Torvalds 13124f193362SPaul SmithPHONY += _modinst_ 13132da30e70SMichal Marek_modinst_: 13141da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 13151da177e4SLinus Torvalds @rm -f $(MODLIB)/source 13161da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 13178e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 13181da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 13191da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 13207e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 13211da177e4SLinus Torvalds fi 13221bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 13238b41fc44SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 1324898490c0SAlexey Gladkov @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1325b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 13261da177e4SLinus Torvalds 132750a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 13281da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 13291da177e4SLinus Torvalds# boot script depmod is the master version. 13304f193362SPaul SmithPHONY += _modinst_post 13316d128e1eSLinus Torvalds_modinst_post: _modinst_ 133250a8ec31SSam Ravnborg $(call cmd,depmod) 13331da177e4SLinus Torvalds 1334d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1335d890f510SJosh BoyerPHONY += modules_sign 1336d890f510SJosh Boyermodules_sign: 1337d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1338d890f510SJosh Boyerendif 1339d890f510SJosh Boyer 13401da177e4SLinus Torvaldselse # CONFIG_MODULES 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds# Modules not configured 13431da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13441da177e4SLinus Torvalds 1345612e47ceSMasahiro YamadaPHONY += modules modules_install 1346612e47ceSMasahiro Yamadamodules modules_install: 13475369f550SMichal Marek @echo >&2 13485369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 13495369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 13505369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 13515369f550SMichal Marek @echo >&2 13521da177e4SLinus Torvalds @exit 1 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvaldsendif # CONFIG_MODULES 13551da177e4SLinus Torvalds 13561da177e4SLinus Torvalds### 13571da177e4SLinus Torvalds# Cleaning is done on three levels. 13581da177e4SLinus Torvalds# make clean Delete most generated files 13591da177e4SLinus Torvalds# Leave enough to build external modules 13601da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 13611da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds# Directories & files removed with 'make clean' 1364b7dca6ddSMasahiro YamadaCLEAN_DIRS += include/ksym 13658b41fc44SMasahiro YamadaCLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps 13661da177e4SLinus Torvalds 13671da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 1368d6fc9fcbSMasahiro YamadaMRPROPER_DIRS += include/config include/generated \ 136946a63d4bSMasahiro Yamada arch/$(SRCARCH)/include/generated .tmp_objdiff \ 137046a63d4bSMasahiro Yamada debian/ snap/ tar-install/ 1371278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \ 137246457133SMasahiro Yamada Module.symvers \ 1373fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1374fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 137546a63d4bSMasahiro Yamada signing_key.x509.signer vmlinux-gdb.py \ 137646a63d4bSMasahiro Yamada *.spec 13771da177e4SLinus Torvalds 137846457133SMasahiro Yamada# Directories & files removed with 'make distclean' 137946457133SMasahiro YamadaDISTCLEAN_DIRS += 138046457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 138146457133SMasahiro Yamada 13821da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 13831da177e4SLinus Torvalds# 13841da177e4SLinus Torvaldsclean: rm-dirs := $(CLEAN_DIRS) 13851da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 13861da177e4SLinus Torvalds 138776cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 13881da177e4SLinus Torvalds 1389bd1ee804SPawel Mollvmlinuxclean: 1390bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1391fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1392bd1ee804SPawel Moll 1393bd1ee804SPawel Mollclean: archclean vmlinuxclean 13941da177e4SLinus Torvalds 13951da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 13961da177e4SLinus Torvalds# 13971da177e4SLinus Torvaldsmrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 13981da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1399cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 14001da177e4SLinus Torvalds 1401b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 14021da177e4SLinus Torvalds$(mrproper-dirs): 14031da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 14041da177e4SLinus Torvalds 1405b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 14061da177e4SLinus Torvalds $(call cmd,rmdirs) 14071da177e4SLinus Torvalds $(call cmd,rmfiles) 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds# distclean 14101da177e4SLinus Torvalds# 141146457133SMasahiro Yamadadistclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) 141246457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 141346457133SMasahiro Yamada 14144f193362SPaul SmithPHONY += distclean 14151da177e4SLinus Torvalds 14161da177e4SLinus Torvaldsdistclean: mrproper 141746457133SMasahiro Yamada $(call cmd,rmdirs) 141846457133SMasahiro Yamada $(call cmd,rmfiles) 14191da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 14201da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1421f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1422f78271dfSMasahiro Yamada -o -name 'core' \) \ 14231da177e4SLinus Torvalds -type f -print | xargs rm -f 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds# Packaging of the kernel to various formats 14271da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14281da177e4SLinus Torvalds 1429bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1430000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1431031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1432000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 14331da177e4SLinus Torvalds 14341da177e4SLinus Torvalds# Brief documentation of the typical targets used 14351da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14361da177e4SLinus Torvalds 14375dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1438a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 14395dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 14405dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 14411da177e4SLinus Torvalds 1442fe69b420SMasahiro YamadaPHONY += help 14431da177e4SLinus Torvaldshelp: 14441da177e4SLinus Torvalds @echo 'Cleaning targets:' 14455ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 14465cc8d246SJesper Juhl @echo ' enough build support to build external modules' 14475ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 14485cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 14491da177e4SLinus Torvalds @echo '' 14501da177e4SLinus Torvalds @echo 'Configuration targets:' 14511da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 14521da177e4SLinus Torvalds @echo '' 14531da177e4SLinus Torvalds @echo 'Other generic targets:' 14541da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 14551da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 14561da177e4SLinus Torvalds @echo '* modules - Build all modules' 14579cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 14581da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 145940ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1460433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1461433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 146262718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 146362718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1464155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1465c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 14661da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 14671da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1468f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 14693f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 14703f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 14713f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 14722fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 147359df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 14742fb9b1bdSSam Ravnborg echo '' 147531b8cc80SRandy Dunlap @echo 'Static analysers:' 14761da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 14771da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1478aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1479ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1480295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 148174425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 14827f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 148374425eeeSNicolas Palix @echo '' 1484eb8305aeSMatthias Maennich @echo 'Tools:' 1485eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1486eb8305aeSMatthias Maennich @echo '' 148731b8cc80SRandy Dunlap @echo 'Kernel selftest:' 14885a5da78bSShuah Khan @echo ' kselftest - Build and run kernel selftest (run as root)' 14895a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 14905a5da78bSShuah Khan @echo ' running kselftest on it' 1491dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1492bbfe63b6SRandy Dunlap @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 14933d6dee7aSBamvor Jian Zhang @echo ' .config.' 14945a5da78bSShuah Khan @echo '' 149537c8a5faSRob Herring @$(if $(dtstree), \ 149637c8a5faSRob Herring echo 'Devicetree:'; \ 149737c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 149837c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 14997aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 15007aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 150137c8a5faSRob Herring echo '') 150237c8a5faSRob Herring 150331b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 150431b8cc80SRandy Dunlap @echo ' use "make tools/help"' 150531b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 150631b8cc80SRandy Dunlap @echo '' 15071da177e4SLinus Torvalds @echo 'Kernel packaging:' 1508000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 15091da177e4SLinus Torvalds @echo '' 15101da177e4SLinus Torvalds @echo 'Documentation targets:' 1511cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 15121da177e4SLinus Torvalds @echo '' 151301dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 15141da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 151501dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 15161da177e4SLinus Torvalds @echo '' 15171da177e4SLinus Torvalds @$(if $(boards), \ 15181da177e4SLinus Torvalds $(foreach b, $(boards), \ 15194234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 15201da177e4SLinus Torvalds echo '') 15215dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 15225dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 15235dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 15245dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 15255dffbe81SSegher Boessenkool echo '') 15261da177e4SLinus Torvalds 15271da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 152845d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 15291da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1530a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1531a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1532701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1533af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1534e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 153528bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 153628bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 153728bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1538a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 15391da177e4SLinus Torvalds @echo '' 15401da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 15411da177e4SLinus Torvalds @echo 'For further info see the ./README file' 15421da177e4SLinus Torvalds 15431da177e4SLinus Torvalds 15445dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 15455dffbe81SSegher Boessenkool 15465dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 15475dffbe81SSegher Boessenkool 1548fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 15495dffbe81SSegher Boessenkool 15505dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 15515dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 15525dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 15535dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 15545dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 15555dffbe81SSegher Boessenkool echo '') 15565dffbe81SSegher Boessenkool 15575dffbe81SSegher Boessenkool 15581da177e4SLinus Torvalds# Documentation targets 15591da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1560e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1561e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 156222cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1563bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1564cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 15651da177e4SLinus Torvalds 156667274c08SMasahiro Yamada# Misc 156767274c08SMasahiro Yamada# --------------------------------------------------------------------------- 156867274c08SMasahiro Yamada 156967274c08SMasahiro YamadaPHONY += scripts_gdb 15707a739ce5SMasahiro Yamadascripts_gdb: prepare0 15711e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 15728d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 157367274c08SMasahiro Yamada 157467274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 157567274c08SMasahiro Yamadaall: scripts_gdb 157667274c08SMasahiro Yamadaendif 157767274c08SMasahiro Yamada 15781da177e4SLinus Torvaldselse # KBUILD_EXTMOD 15791da177e4SLinus Torvalds 15801da177e4SLinus Torvalds### 15811da177e4SLinus Torvalds# External module support. 15821da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 15831da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 15841da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 15851da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 15861da177e4SLinus Torvalds# be used. 15871da177e4SLinus Torvalds# 15881da177e4SLinus Torvalds# The following are the only valid targets when building external 15891da177e4SLinus Torvalds# modules. 15901da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 15911da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 15921da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 15931da177e4SLinus Torvalds# make M=dir modules_install 1594070b98bfSSam Ravnborg# Install the modules built in the module directory 15951da177e4SLinus Torvalds# Assumes install directory is already created 15961da177e4SLinus Torvalds 15971da177e4SLinus Torvalds# We are always building modules 15981da177e4SLinus TorvaldsKBUILD_MODULES := 1 15991da177e4SLinus Torvalds 16004f193362SPaul SmithPHONY += $(objtree)/Module.symvers 16011da177e4SLinus Torvalds$(objtree)/Module.symvers: 16021da177e4SLinus Torvalds @test -e $(objtree)/Module.symvers || ( \ 16031da177e4SLinus Torvalds echo; \ 16041da177e4SLinus Torvalds echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 16051da177e4SLinus Torvalds echo " is missing; modules will have no dependencies and modversions."; \ 16061da177e4SLinus Torvalds echo ) 16071da177e4SLinus Torvalds 1608c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 1609c99f3918SMasahiro YamadaPHONY += modules 1610c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers 1611b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 16121da177e4SLinus Torvalds 16134f193362SPaul SmithPHONY += modules_install 1614a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1615a67dc21aSSam Ravnborg 1616a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 16174f193362SPaul SmithPHONY += _emodinst_ 1618a67dc21aSSam Ravnborg_emodinst_: 1619a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1620b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 16211da177e4SLinus Torvalds 16224f193362SPaul SmithPHONY += _emodinst_post 1623a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1624a67dc21aSSam Ravnborg $(call cmd,depmod) 1625a67dc21aSSam Ravnborg 162676cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 1627bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps 16281da177e4SLinus Torvalds 1629d4945049SMasahiro YamadaPHONY += / 1630d4945049SMasahiro Yamada/: 1631d4945049SMasahiro Yamada @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' 1632d4945049SMasahiro Yamada 1633fe69b420SMasahiro YamadaPHONY += help 16341da177e4SLinus Torvaldshelp: 16351da177e4SLinus Torvalds @echo ' Building external modules.' 16361da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 16371da177e4SLinus Torvalds @echo '' 16381da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 16391da177e4SLinus Torvalds @echo ' modules_install - install the module' 16401da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 16411da177e4SLinus Torvalds @echo '' 164206300b21SSam Ravnborg 1643059bc9fcSMasahiro YamadaPHONY += prepare 16441da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 16451da177e4SLinus Torvalds 1646b1fbfcb4SMasahiro Yamada# Single targets 1647b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1648b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1649b1fbfcb4SMasahiro Yamada# 1650b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1651b1fbfcb4SMasahiro Yamada# 1652b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1653b1fbfcb4SMasahiro Yamada# 1654b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1655b1fbfcb4SMasahiro Yamada# 1656b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1657b1fbfcb4SMasahiro Yamada 1658b1fbfcb4SMasahiro Yamadaifdef single-build 1659b1fbfcb4SMasahiro Yamada 1660b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1661b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1662b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1663b1fbfcb4SMasahiro Yamada 1664b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost 1665b1fbfcb4SMasahiro Yamada @: 1666b1fbfcb4SMasahiro Yamada$(single-no-ko): descend 1667b1fbfcb4SMasahiro Yamada @: 1668b1fbfcb4SMasahiro Yamada 1669b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1670b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 1671b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1672b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp 1673b1fbfcb4SMasahiro Yamadaendif 1674b1fbfcb4SMasahiro Yamada 1675b1fbfcb4SMasahiro YamadaPHONY += single_modpost 1676b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko) 1677b1fbfcb4SMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 1678b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1679b1fbfcb4SMasahiro Yamada 1680b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1 1681b1fbfcb4SMasahiro Yamada 1682b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1683b1fbfcb4SMasahiro Yamada 1684b1fbfcb4SMasahiro Yamada# trim unrelated directories 1685b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \ 1686b1fbfcb4SMasahiro Yamada $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1687b1fbfcb4SMasahiro Yamada 1688b1fbfcb4SMasahiro Yamadaendif 1689b1fbfcb4SMasahiro Yamada 1690c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1691c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1692c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1693c99f3918SMasahiro Yamada# make menuconfig etc. 1694c99f3918SMasahiro Yamada# Error messages still appears in the original language 1695c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 1696c99f3918SMasahiro Yamadadescend: $(build-dirs) 1697c99f3918SMasahiro Yamada$(build-dirs): prepare 1698b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ \ 1699f566e1fbSMasahiro Yamada single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \ 1700b1fbfcb4SMasahiro Yamada need-builtin=1 need-modorder=1 1701c99f3918SMasahiro Yamada 170276cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 170376cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 170476cd306dSMasahiro Yamada$(clean-dirs): 170576cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 170676cd306dSMasahiro Yamada 170788d7be03SMichal Marekclean: $(clean-dirs) 170888d7be03SMichal Marek $(call cmd,rmdirs) 170988d7be03SMichal Marek $(call cmd,rmfiles) 171043f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1711ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 17124f0e3a57SRob Herring -o -name '*.ko.*' \ 17134f0e3a57SRob Herring -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1714ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 1715bbc55bdeSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 171688d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 17179a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 17184fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 171988d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 17208b41fc44SMasahiro Yamada -o -name '.tmp_*.o.*' \ 17216b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1722433db3e2SVinÃcius Tinti -o -name '*.ll' \ 172388d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 172488d7be03SMichal Marek 17251da177e4SLinus Torvalds# Generate tags for editors 17261da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1727a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1728858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 17291da177e4SLinus Torvalds 1730f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 17311da177e4SLinus Torvalds $(call cmd,tags) 17321da177e4SLinus Torvalds 1733eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1734eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1735eb8305aeSMatthias Maennich 1736eb8305aeSMatthias MaennichPHONY += nsdeps 1737bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1738eb8305aeSMatthias Maennichnsdeps: modules 1739bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1740eb8305aeSMatthias Maennich 17411da177e4SLinus Torvalds# Scripts to check various things for consistency 17421da177e4SLinus Torvalds# --------------------------------------------------------------------------- 17431da177e4SLinus Torvalds 1744279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1745279f3dd3SPeter Foley 17461da177e4SLinus Torvaldsincludecheck: 1747436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 17481da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 174980007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 17501da177e4SLinus Torvalds 17511da177e4SLinus Torvaldsversioncheck: 17522ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 17531da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 175480007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 17551da177e4SLinus Torvalds 175674425eeeSNicolas Palixcoccicheck: 1757858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 175874425eeeSNicolas Palix 17591da177e4SLinus Torvaldsnamespacecheck: 17601da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 17611da177e4SLinus Torvalds 1762295ac051SAdrian Bunkexport_report: 1763295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1764295ac051SAdrian Bunk 1765c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1766e3ccf6e3SJeff Dike 1767011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1768011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1769011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1770011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1771011e3a9aSJeff Dikeifeq ($(ARCH), um) 1772011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1773011e3a9aSJeff Dikeelse 1774011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1775011e3a9aSJeff Dikeendif 17761da177e4SLinus Torvaldscheckstack: 17771da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 177875dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 17791da177e4SLinus Torvalds 17807b8ea53dSAmerigo Wangkernelrelease: 17817b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 178201ab1788SAmerigo Wang 1783cb58455cSSam Ravnborgkernelversion: 17842244cbd8SSam Ravnborg @echo $(KERNELVERSION) 17851da177e4SLinus Torvalds 1786c398ff00SMike Marciniszynimage_name: 1787c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1788c398ff00SMike Marciniszyn 1789ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1790f47a23ceSMasahiro Yamada 1791f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_) 1792f47a23ceSMasahiro Yamadatools_silent=s 1793f47a23ceSMasahiro Yamadaendif 1794f47a23ceSMasahiro Yamada 1795ea01fa9fSBorislav Petkovtools/: FORCE 1796bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 179775dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1798ea01fa9fSBorislav Petkov 1799ea01fa9fSBorislav Petkovtools/%: FORCE 1800bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 180175dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1802ea01fa9fSBorislav Petkov 18031da177e4SLinus Torvalds# FIXME Should go into a make.lib or something 18041da177e4SLinus Torvalds# =========================================================================== 18051da177e4SLinus Torvalds 18061da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 18071da177e4SLinus Torvalds cmd_rmdirs = rm -rf $(rm-dirs) 18081da177e4SLinus Torvalds 18091da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 18101da177e4SLinus Torvalds cmd_rmfiles = rm -f $(rm-files) 18111da177e4SLinus Torvalds 1812bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 181350a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1814569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 18155a144a1aSMasahiro Yamada $(KERNELRELEASE) 181650a8ec31SSam Ravnborg 1817392885eeSMasahiro Yamada# read saved command lines for existing targets 1818392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 18191da177e4SLinus Torvalds 1820b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 18211da177e4SLinus Torvalds 18222042b548SMasahiro Yamadaendif # config-targets 18232042b548SMasahiro Yamadaendif # mixed-build 1824688931a5SMasahiro Yamadaendif # need-sub-make 18251da177e4SLinus Torvalds 18264f193362SPaul SmithPHONY += FORCE 18271da177e4SLinus TorvaldsFORCE: 18284f193362SPaul Smith 1829bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1830fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 18314f193362SPaul Smith.PHONY: $(PHONY) 1832