1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2bfeffd15SLinus TorvaldsVERSION = 5 38f3d9f35SLinus TorvaldsPATCHLEVEL = 7 455922c9dSLinus TorvaldsSUBLEVEL = 0 52ef96a5bSLinus TorvaldsEXTRAVERSION = -rc5 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 160*93fdddfeSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 161*93fdddfeSMasahiro Yamada 162688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 163688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 164688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 165688931a5SMasahiro Yamadaneed-sub-make := 1 166688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 167*93fdddfeSMasahiro Yamada$(this-makefile): ; 168688931a5SMasahiro Yamadaendif 169688931a5SMasahiro Yamada 17025b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 171221cc2d2SMasahiro Yamadaexport sub_make_done := 1 172221cc2d2SMasahiro Yamada 173688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 174688931a5SMasahiro Yamada 1750b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make 1760b35786dSMilton Miller 177*93fdddfeSMasahiro Yamada$(filter-out _all sub-make $(this-makefile), $(MAKECMDGOALS)) _all: sub-make 17816f89098SCharles Keepax @: 1790b35786dSMilton Miller 180c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 1812e8d696bSMasahiro Yamadasub-make: 18225b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 1831da177e4SLinus Torvalds 184688931a5SMasahiro Yamadaendif # need-sub-make 185221cc2d2SMasahiro Yamadaendif # sub_make_done 186688931a5SMasahiro Yamada 1871da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 188688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 1891da177e4SLinus Torvalds 1907ff52571SMasahiro Yamada# Do not print "Entering directory ...", 1917ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 1927ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 1937ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 1947ff52571SMasahiro Yamada 195aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 196aa55c8e2SMasahiro Yamada# C compilation. 197aa55c8e2SMasahiro Yamada# 198aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 199aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 200aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not. 201aa55c8e2SMasahiro Yamada# 202036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details, 203036db11cSCao jin# including where to get the "sparse" utility. 204aa55c8e2SMasahiro Yamada 205aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line") 206aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = $(C) 207aa55c8e2SMasahiro Yamadaendif 208aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC 209aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = 0 210aa55c8e2SMasahiro Yamadaendif 211aa55c8e2SMasahiro Yamada 2127e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 2137e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 214aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line") 215aa55c8e2SMasahiro Yamada KBUILD_EXTMOD := $(M) 216aa55c8e2SMasahiro Yamadaendif 217aa55c8e2SMasahiro Yamada 218051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD 219051f278eSMasahiro Yamada 220394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 221394053f4SMasahiro Yamada 22225b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2239da0763bSMichal Marek # building in the source tree 2249da0763bSMichal Marek srctree := . 225051f278eSMasahiro Yamada building_out_of_srctree := 2269da0763bSMichal Marekelse 22725b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2289da0763bSMichal Marek # building in a subdirectory of the source tree 2299da0763bSMichal Marek srctree := .. 2309da0763bSMichal Marek else 23125b146c5SMasahiro Yamada srctree := $(abs_srctree) 2329da0763bSMichal Marek endif 233051f278eSMasahiro Yamada building_out_of_srctree := 1 2349da0763bSMichal Marekendif 2352c1f4f12SMasahiro Yamada 23695fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 23795fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 23895fd3f87SMasahiro Yamadaendif 2392c1f4f12SMasahiro Yamada 2407e1c0477SMichal Marekobjtree := . 2416b12de69SMasahiro YamadaVPATH := $(srctree) 2421da177e4SLinus Torvalds 243051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2441da177e4SLinus Torvalds 2452c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2462c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2472c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2482c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2492c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2502c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2512c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2522c1f4f12SMasahiro Yamada 2532c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2542c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h 2552c1f4f12SMasahiro Yamada 25622340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 25722340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2582c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 25959b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2604623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 2614623980dSDavid Engraf outputmakefile 262a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \ 263a29d4d8cSMasahiro Yamada kernelrelease 264394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 2652c1f4f12SMasahiro Yamada 2662042b548SMasahiro Yamadaconfig-build := 2672042b548SMasahiro Yamadamixed-build := 2682042b548SMasahiro Yamadaneed-config := 1 269d7942413SMasahiro Yamadamay-sync-config := 1 270394053f4SMasahiro Yamadasingle-build := 2712c1f4f12SMasahiro Yamada 2722c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2732c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2742042b548SMasahiro Yamada need-config := 2752c1f4f12SMasahiro Yamada endif 2762c1f4f12SMasahiro Yamadaendif 2772c1f4f12SMasahiro Yamada 278d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 279d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 2802042b548SMasahiro Yamada may-sync-config := 281d7942413SMasahiro Yamada endif 282d7942413SMasahiro Yamadaendif 283d7942413SMasahiro Yamada 284d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 2852042b548SMasahiro Yamada may-sync-config := 286d7942413SMasahiro Yamadaendif 287d7942413SMasahiro Yamada 2882c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 2892c1f4f12SMasahiro Yamada ifneq ($(filter config %config,$(MAKECMDGOALS)),) 2902042b548SMasahiro Yamada config-build := 1 2912c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 2922042b548SMasahiro Yamada mixed-build := 1 2932c1f4f12SMasahiro Yamada endif 2942c1f4f12SMasahiro Yamada endif 2952c1f4f12SMasahiro Yamadaendif 29622340a06SMasahiro Yamada 297394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 298394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 299394053f4SMasahiro Yamada single-build := 1 300394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 301394053f4SMasahiro Yamada mixed-build := 1 302394053f4SMasahiro Yamada endif 303394053f4SMasahiro Yamadaendif 304394053f4SMasahiro Yamada 30522340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 30622340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 30722340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3082042b548SMasahiro Yamada mixed-build := 1 30922340a06SMasahiro Yamada endif 31022340a06SMasahiro Yamadaendif 31122340a06SMasahiro Yamada 3122c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3132c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3142c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3152042b548SMasahiro Yamada mixed-build := 1 3162c1f4f12SMasahiro Yamada endif 3172c1f4f12SMasahiro Yamadaendif 3182c1f4f12SMasahiro Yamada 3192042b548SMasahiro Yamadaifdef mixed-build 3202c1f4f12SMasahiro Yamada# =========================================================================== 3212c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3222c1f4f12SMasahiro Yamada# Handle them one by one. 3232c1f4f12SMasahiro Yamada 3242c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3252c1f4f12SMasahiro Yamada 3262c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 3272c1f4f12SMasahiro Yamada @: 3282c1f4f12SMasahiro Yamada 3292c1f4f12SMasahiro Yamada__build_one_by_one: 3302c1f4f12SMasahiro Yamada $(Q)set -e; \ 3312c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3322c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3332c1f4f12SMasahiro Yamada done 3342c1f4f12SMasahiro Yamada 3352042b548SMasahiro Yamadaelse # !mixed-build 3362c1f4f12SMasahiro Yamada 3372c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include 3382c1f4f12SMasahiro Yamada 3392c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3402c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 3412c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3422c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3432c1f4f12SMasahiro Yamada 344b2d35fa5SAnders Roxellinclude scripts/subarch.include 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3471da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3481da177e4SLinus Torvalds# 3491da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3501da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3511da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3521da177e4SLinus Torvalds# make ARCH=ia64 3531da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3541da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3571da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3581da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3591da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3601da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3611da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3621da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3631da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3642331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds# Architecture as present in compile.h 3671da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3686752ed90SThomas GleixnerSRCARCH := $(ARCH) 3691da177e4SLinus Torvalds 370d746d647SSam Ravnborg# Additional ARCH settings for x86 371d746d647SSam Ravnborgifeq ($(ARCH),i386) 372d746d647SSam Ravnborg SRCARCH := x86 373d746d647SSam Ravnborgendif 374d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 375d746d647SSam Ravnborg SRCARCH := x86 376d746d647SSam Ravnborgendif 37774b469f2SSam Ravnborg 3785e538790SSam Ravnborg# Additional ARCH settings for sparc 379e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 380e69f58c0SNamhyung Kim SRCARCH := sparc 381e69f58c0SNamhyung Kimendif 382a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 3835e538790SSam Ravnborg SRCARCH := sparc 384a439fe51SSam Ravnborgendif 3852fb9b1bdSSam Ravnborg 3863cc000b5SPaul Mundt# Additional ARCH settings for sh 3873cc000b5SPaul Mundtifeq ($(ARCH),sh64) 3883cc000b5SPaul Mundt SRCARCH := sh 3893cc000b5SPaul Mundtendif 3903cc000b5SPaul Mundt 39114cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 39241263fc6SBen Gardinerexport KCONFIG_CONFIG 39314cdd3c4SRoman Zippel 3942a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile. 3952a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig 3962a86f661SMasahiro Yamada 3971da177e4SLinus Torvalds# SHELL used by kbuild 398858805b3SMasahiro YamadaCONFIG_SHELL := sh 3991da177e4SLinus Torvalds 4006d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4016d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4026d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 403d7f14c66SUwe Kleine-König 404a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 405a0d1c951SMasahiro YamadaHOSTCC = clang 406a0d1c951SMasahiro YamadaHOSTCXX = clang++ 407a0d1c951SMasahiro Yamadaelse 4081da177e4SLinus TorvaldsHOSTCC = gcc 4091da177e4SLinus TorvaldsHOSTCXX = g++ 410a0d1c951SMasahiro Yamadaendif 4117f3a59dbSMasahiro Yamada 4127f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 4137f3a59dbSMasahiro Yamada -O2 -fomit-frame-pointer -std=gnu89 4147f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS := 4157f3a59dbSMasahiro Yamada 4167f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 417735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 418f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 419f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds# Make variables (CC, etc...) 4221da177e4SLinus TorvaldsCPP = $(CC) -E 423a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 424a0d1c951SMasahiro YamadaCC = clang 425a0d1c951SMasahiro YamadaLD = ld.lld 426a0d1c951SMasahiro YamadaAR = llvm-ar 427a0d1c951SMasahiro YamadaNM = llvm-nm 428a0d1c951SMasahiro YamadaOBJCOPY = llvm-objcopy 429a0d1c951SMasahiro YamadaOBJDUMP = llvm-objdump 430a0d1c951SMasahiro YamadaREADELF = llvm-readelf 431a0d1c951SMasahiro YamadaOBJSIZE = llvm-size 432a0d1c951SMasahiro YamadaSTRIP = llvm-strip 433a0d1c951SMasahiro Yamadaelse 434a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 435a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 4361da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4371da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4381da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4391da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 440eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 441a0d1c951SMasahiro YamadaOBJSIZE = $(CROSS_COMPILE)size 442a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 443a0d1c951SMasahiro Yamadaendif 444e83b9f55SAndrii NakryikoPAHOLE = pahole 44573a4f6dbSMasahiro YamadaLEX = flex 44673a4f6dbSMasahiro YamadaYACC = bison 4471da177e4SLinus TorvaldsAWK = awk 448caa27b66SSam RavnborgINSTALLKERNEL := installkernel 4491da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 4501da177e4SLinus TorvaldsPERL = perl 451011bf125SMasahiro YamadaPYTHON = python 452e9781b52SMasahiro YamadaPYTHON3 = python3 4531da177e4SLinus TorvaldsCHECK = sparse 454858805b3SMasahiro YamadaBASH = bash 4551da177e4SLinus Torvalds 45680a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 4576c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 4580c22be07SDouglas AndersonNOSTDINC_FLAGS := 4596588169dSSam RavnborgCFLAGS_MODULE = 4606588169dSSam RavnborgAFLAGS_MODULE = 4616588169dSSam RavnborgLDFLAGS_MODULE = 4621da177e4SLinus TorvaldsCFLAGS_KERNEL = 4631da177e4SLinus TorvaldsAFLAGS_KERNEL = 464b36fad65SMichal MarekLDFLAGS_vmlinux = 4651da177e4SLinus Torvalds 466abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 467abbf1590SDavid HowellsUSERINCLUDE := \ 4689d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 4699d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 470abbf1590SDavid Howells -I$(srctree)/include/uapi \ 4713308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 472abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 473abbf1590SDavid Howells 4741da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 4751da177e4SLinus Torvalds# Needed to be compatible with the O= option 476abbf1590SDavid HowellsLINUXINCLUDE := \ 4779d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 4789d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 479051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 480f8224f7fSMasahiro Yamada -I$(objtree)/include \ 481f8224f7fSMasahiro Yamada $(USERINCLUDE) 4821da177e4SLinus Torvalds 48342a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 484eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 48542a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 486b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 48751b97e35SKirill A. Shutemov -Wno-format-security \ 488433dc2ebSMasahiro Yamada -std=gnu89 489433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 49080c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 49180c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 4926588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 4936588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 49410df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 49510df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds 496d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 497433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS := 4985241ab4cSMasahiro YamadaCLANG_FLAGS := 4991da177e4SLinus Torvalds 500aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC 501eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL 50294f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 5037bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 5041da177e4SLinus Torvalds 505d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 5060e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 5070e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 508222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 5096588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 51080c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds# Files to ignore in find ... statements 5131da177e4SLinus Torvalds 514ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 515ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 516ae63b2d7SPrarit Bhargava -prune -o 517450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 518450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds# =========================================================================== 5211da177e4SLinus Torvalds# Rules shared between *config targets and build targets 5221da177e4SLinus Torvalds 523312a3d09SCao jin# Basic helpers built in scripts/basic/ 5244f193362SPaul SmithPHONY += scripts_basic 5251da177e4SLinus Torvaldsscripts_basic: 5261da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 527638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 5281da177e4SLinus Torvalds 5294f193362SPaul SmithPHONY += outputmakefile 530e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 531fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 532fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 533fd5f0cd6SJan Beulich# output directory. 5343a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 5353a51ff34SVladimir Kondratiev# ignore whole output directory 5361da177e4SLinus Torvaldsoutputmakefile: 537051f278eSMasahiro Yamadaifdef building_out_of_srctree 538e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 539e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 540e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 541e8e83a23SMasahiro Yamada echo >&2 "***"; \ 542e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 543e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 544e8e83a23SMasahiro Yamada echo >&2 "***"; \ 545e8e83a23SMasahiro Yamada false; \ 546e8e83a23SMasahiro Yamada fi 54792979997SAndi Kleen $(Q)ln -fsn $(srctree) source 5484fd61277SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 549156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 550156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 551fd5f0cd6SJan Beulichendif 5521da177e4SLinus Torvalds 55399516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 554ae6b289aSChris Friesifneq ($(CROSS_COMPILE),) 5555241ab4cSMasahiro YamadaCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 556ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 557238bcbc4SMasahiro YamadaCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 558ef8c4ed9SStefan AgnerGCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 559ae6b289aSChris Friesendif 560ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),) 561238bcbc4SMasahiro YamadaCLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 562ae6b289aSChris Friesendif 5637e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1) 564238bcbc4SMasahiro YamadaCLANG_FLAGS += -no-integrated-as 565876a0600SNathan Chancellorendif 566589834b3SNathan ChancellorCLANG_FLAGS += -Werror=unknown-warning-option 567238bcbc4SMasahiro YamadaKBUILD_CFLAGS += $(CLANG_FLAGS) 568238bcbc4SMasahiro YamadaKBUILD_AFLAGS += $(CLANG_FLAGS) 5693bd98050SJoel Stanleyexport CLANG_FLAGS 570ae6b289aSChris Friesendif 571ae6b289aSChris Fries 572315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 573315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 574315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 575315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade. 576902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 577315bab4eSMasahiro Yamada 5782042b548SMasahiro Yamadaifdef config-build 5791da177e4SLinus Torvalds# =========================================================================== 5801da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 5811da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 5821da177e4SLinus Torvalds 5831da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 5841da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 5851da177e4SLinus Torvalds# used for 'make defconfig' 586a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 587315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 5881da177e4SLinus Torvalds 58936de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 59031110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 59131110ebbSSam Ravnborg 59236de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 5931da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 5941da177e4SLinus Torvalds 5952042b548SMasahiro Yamadaelse #!config-build 5961da177e4SLinus Torvalds# =========================================================================== 5971da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 5981da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 5991da177e4SLinus Torvalds 6002c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 6012c1f4f12SMasahiro Yamada# but instead _all depend on modules 6022c1f4f12SMasahiro YamadaPHONY += all 6032c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 6042c1f4f12SMasahiro Yamada_all: all 6052c1f4f12SMasahiro Yamadaelse 6062c1f4f12SMasahiro Yamada_all: modules 6072c1f4f12SMasahiro Yamadaendif 6082c1f4f12SMasahiro Yamada 6092c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 6102c1f4f12SMasahiro Yamada# Normally, just do built-in. 6112c1f4f12SMasahiro Yamada 6122c1f4f12SMasahiro YamadaKBUILD_MODULES := 6132c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 6142c1f4f12SMasahiro Yamada 6152c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 6162c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider 6172c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to 6182c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them. 6192c1f4f12SMasahiro Yamada 6202c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 6212c1f4f12SMasahiro Yamada KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 6222c1f4f12SMasahiro Yamadaendif 6232c1f4f12SMasahiro Yamada 6242c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 6252c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 6262c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 6272c1f4f12SMasahiro Yamada 628d85103acSMasahiro Yamadaifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),) 6292c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6302c1f4f12SMasahiro Yamadaendif 6312c1f4f12SMasahiro Yamada 6322c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 6332c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6342c1f4f12SMasahiro Yamadaendif 6352c1f4f12SMasahiro Yamada 6362c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 6372c1f4f12SMasahiro Yamada 6382042b548SMasahiro Yamadaifdef need-config 639d93a18f2SMasahiro Yamadainclude include/config/auto.conf 640d93a18f2SMasahiro Yamadaendif 641d93a18f2SMasahiro Yamada 6421da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 6431da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 6441da177e4SLinus Torvaldsinit-y := init/ 645f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 646d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 6471da177e4SLinus Torvaldsnet-y := net/ 6481da177e4SLinus Torvaldslibs-y := lib/ 6491da177e4SLinus Torvaldscore-y := usr/ 65037d9fe47SFeng Wuvirt-y := virt/ 6511da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 6521da177e4SLinus Torvalds 653315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 654315bab4eSMasahiro Yamada# command line. 655315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 656315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 657315bab4eSMasahiro Yamadaall: vmlinux 658315bab4eSMasahiro Yamada 659315bab4eSMasahiro YamadaCFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 660315bab4eSMasahiro Yamada $(call cc-option,-fno-tree-loop-im) \ 661315bab4eSMasahiro Yamada $(call cc-disable-warning,maybe-uninitialized,) 6625aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 663315bab4eSMasahiro Yamada 664b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 665b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 666b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 667b1f4ff74SPaulo Zanoniendif 668b1f4ff74SPaulo Zanoni 669669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 670669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 671669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 672669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 673669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 674669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 675669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS 676669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS 677669e06b1SMasahiro Yamada 678315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 679315bab4eSMasahiro Yamada 6802042b548SMasahiro Yamadaifdef need-config 6812042b548SMasahiro Yamadaifdef may-sync-config 682315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 683315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 684315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 685d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 6861da177e4SLinus Torvalds 68705850719SMasahiro Yamada$(KCONFIG_CONFIG): 68805850719SMasahiro Yamada @echo >&2 '***' 68905850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 69005850719SMasahiro Yamada @echo >&2 '***' 69105850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 69205850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 69305850719SMasahiro Yamada @echo >&2 '***' 69405850719SMasahiro Yamada @/bin/false 6951da177e4SLinus Torvalds 69661277981SUlf Magnusson# The actual configuration files used during the build are stored in 69761277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 69861277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 6999390dff6SMasahiro Yamada# 7009390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 7019390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 702f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 7033044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) 704911a91c3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 7052042b548SMasahiro Yamadaelse # !may-sync-config 706d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 707d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 708d7942413SMasahiro Yamada# Use auto.conf to trigger the test 7099ee4e336SSam RavnborgPHONY += include/config/auto.conf 7109ee4e336SSam Ravnborg 7119ee4e336SSam Ravnborginclude/config/auto.conf: 712264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 7135369f550SMichal Marek echo >&2; \ 7145369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 7155369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 7165369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 7175369f550SMichal Marek echo >&2 ; \ 7189ee4e336SSam Ravnborg /bin/false) 7199ee4e336SSam Ravnborg 720d7942413SMasahiro Yamadaendif # may-sync-config 7212042b548SMasahiro Yamadaendif # need-config 7221da177e4SLinus Torvalds 723a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 724ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 725bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 726bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 7276f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 728a1c48bb1SGeert Uytterhoeven 72915f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 730a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 73115f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 73215f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3 73315f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 73415f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 7351da177e4SLinus Torvaldsendif 7361da177e4SLinus Torvalds 73769102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 73869102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 739b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 74069102311SJiri Kosina 741d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov 7426b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins 7436b90bd4bSEmese Revfy 7441873e870SAndi Kleenifdef CONFIG_READABLE_ASM 7451873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 7461873e870SAndi Kleen# reorder blocks reorders the control in the function 7471873e870SAndi Kleen# ipa clone creates specialized cloned functions 7481873e870SAndi Kleen# partial inlining inlines only parts of functions 7491873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 7501873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 7511873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 7521873e870SAndi Kleenendif 7531873e870SAndi Kleen 75408f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 755a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 75635bb5b1eSAndi Kleenendif 75735bb5b1eSAndi Kleen 7582a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 759050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 760050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 7612a61f474SMasahiro Yamada 7622a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 763e06b8b98SSam Ravnborg 764076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 765a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 766a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier 767a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 768cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 769cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names. 770cfe17c9bSMasahiro Yamada# See modpost pattern 2 771a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge 772cfe17c9bSMasahiro Yamadaelse 773cfe17c9bSMasahiro Yamada 774cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build. 775cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 7769df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable 777e2079e93SNathan Chancellor 778e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement. 779e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and 780e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 781e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 782cfe17c9bSMasahiro Yamadaendif 783cfe17c9bSMasahiro Yamada 7840a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 7851da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 786a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 7871da177e4SLinus Torvaldselse 7887e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 7897e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 7907e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 7917e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 7927e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 7937e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 794a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 7951da177e4SLinus Torvaldsendif 7967e9501fdSRabin Vincentendif 7971da177e4SLinus Torvalds 798709a972eSKees Cook# Initialize all stack variables with a pattern, if desired. 799709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL 800709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 801709a972eSKees Cookendif 802709a972eSKees Cook 8031e88e415SMasahiro YamadaDEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 8042062afb4SLinus Torvalds 8051da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 806866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 8079d937444SMasahiro YamadaDEBUG_CFLAGS += -gsplit-dwarf 808866ced95SAndi Kleenelse 8091e88e415SMasahiro YamadaDEBUG_CFLAGS += -g 810866ced95SAndi Kleenendif 8112288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 8121da177e4SLinus Torvaldsendif 813bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 8149d937444SMasahiro YamadaDEBUG_CFLAGS += -gdwarf-4 815bfaf2dd3SAndi Kleenendif 8161da177e4SLinus Torvalds 817d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 8181e88e415SMasahiro YamadaDEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 819e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 820d6f4ceb7SAndi Kleenendif 821d6f4ceb7SAndi Kleen 8221e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS) 8231e88e415SMasahiro Yamadaexport DEBUG_CFLAGS 8241e88e415SMasahiro Yamada 825606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 82607d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD 82707d04081SVasily Gorbik # gcc 5 supports generating the mcount tables directly 82807d04081SVasily Gorbik ifeq ($(call cc-option-yn,-mrecord-mcount),y) 82907d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 83007d04081SVasily Gorbik export CC_USING_RECORD_MCOUNT := 1 831a2546faeSSteven Rostedt endif 8322f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 8332f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 8342f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 8352f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 8362f4df001SVasily Gorbik endif 8372f4df001SVasily Gorbik endif 83807d04081SVasily Gorbikendif 839a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 840f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 841f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 842f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 843a2546faeSSteven Rostedt endif 844f28bc3c3SVasily Gorbikendif 845f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 846f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 847f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 84872441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 849cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 85072441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 85172441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 85272441cb1SSteven Rostedt endif 85372441cb1SSteven Rostedtendif 85416444a8aSArnaldo Carvalho de Meloendif 85516444a8aSArnaldo Carvalho de Melo 85691341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 85791341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 85891341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 85991341d4bSSam Ravnborgendif 86091341d4bSSam Ravnborg 86190ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 862e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 863e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 86490ad4052SMasahiro Yamadaendif 86590ad4052SMasahiro Yamada 86643bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH 86743bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 86843bd3a95SMiroslav Benesendif 86943bd3a95SMiroslav Benes 870e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 871e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 872e8e69931SSam Ravnborg 8731da177e4SLinus Torvalds# warn about C99 declaration after statement 874a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 8751da177e4SLinus Torvalds 8760bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 8778289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 8780bb95f80SKees Cook 879070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 880fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 8811da177e4SLinus Torvalds 882217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 883217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 884217c3e01SStephen Rothwell 8855c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 8865c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) 88744720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) 8885a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 8895c45de21SLinus Torvalds 890adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 891adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 892adc71920SLinus Torvalds 89378a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 89478a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) 89578a5255fSLinus Torvalds 896fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 897a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 898d0115552SLinus Torvalds 89987e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this 90087e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we 90187e0d4f0SDaniel Borkmann# need to disable it here generally. 90287e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 90387e0d4f0SDaniel Borkmann 90487e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine 90587e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled. 90687e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 90787e0d4f0SDaniel Borkmann 9083ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 9093ce120b1SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 9103ce120b1SLinus Torvalds 9118f7f5c9fSAndi Kleen# conserve stack if available 9128f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 9138f7f5c9fSAndi Kleen 914fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 915fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 916fe7c36c7SJosh Triplett 917ea8daa7bSDaniel Wagner# enforce correct pointer usage 918ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 919ea8daa7bSDaniel Wagner 920c834f0e8SKees Cook# Require designated initializers for all marked structures 921c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 922c834f0e8SKees Cook 923a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 924a73619a8SMasahiro YamadaKBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 925a73619a8SMasahiro Yamada 92629be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is 92729be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern 92829be86d7SSeth Forsheeifdef CONFIG_RETPOLINE 92929be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 93029be86d7SSeth Forsheeendif 93129be86d7SSeth Forshee 932a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan 933a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn 934c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan 935a86fe353SMasahiro Yamada 9368cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 9378cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 9388cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 9398cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 94052bcc330SSam Ravnborg 94189ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id 94289ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id 94318991197SRoland McGrath 9445d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 945d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 9465d7d18f5SDavid Howellsendif 9475d7d18f5SDavid Howells 9485cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 9495cf896fbSPeter CollingbourneLDFLAGS_vmlinux += --pack-dyn-relocs=relr 9505cf896fbSPeter Collingbourneendif 9515cf896fbSPeter Collingbourne 9527f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 9537f3a59dbSMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS)) 9547f3a59dbSMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS)) 9557f3a59dbSMasahiro Yamada 95680591e61SLuc Van Oostenryck# make the checker run with the right architecture 95780591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 95880591e61SLuc Van Oostenryck 95914516765SLuc Van Oostenryck# insure the checker run with the right endianness 96014516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 96114516765SLuc Van Oostenryck 9621f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 9631f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 9641f2f01b1SLuc Van Oostenryck 9651da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 9661da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 9671da177e4SLinus Torvalds# set in the environment 9681da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 9691da177e4SLinus Torvalds# this default value 9701da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 9711da177e4SLinus Torvalds 9721da177e4SLinus Torvalds# 9731da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 9741da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 9751da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds# 978f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 979f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 980f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 981f4d4ffc0SJason Cooper# 982f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 983f4d4ffc0SJason Cooper 984f4d4ffc0SJason Cooper# 9851da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 9861da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 987070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 9881da177e4SLinus Torvalds# 9891da177e4SLinus Torvalds 990df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 9911da177e4SLinus Torvaldsexport MODLIB 9921da177e4SLinus Torvalds 993ac031f26STheodore Ts'o# 9942ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 9952ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 9962ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 997177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 9982ea03891SSam Ravnborg 999ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 1000ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 10012ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 1002ac031f26STheodore Ts'oelse 10032ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 1004ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 1005ac031f26STheodore Ts'oelse 10062ea03891SSam Ravnborgmod_strip_cmd = true 1007ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 1008ac031f26STheodore Ts'oexport mod_strip_cmd 1009ac031f26STheodore Ts'o 1010beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 1011beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 1012beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ. 1013beb50df3SBertrand Jacquin 1014beb50df3SBertrand Jacquinmod_compress_cmd = true 1015beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS 1016beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_GZIP 10173d1450d5SJason A. Donenfeld mod_compress_cmd = gzip -n -f 1018beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_GZIP 1019beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_XZ 10203d1450d5SJason A. Donenfeld mod_compress_cmd = xz -f 1021beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_XZ 1022beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS 1023beb50df3SBertrand Jacquinexport mod_compress_cmd 1024beb50df3SBertrand Jacquin 1025d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 10263ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY)) 10273ee550f1SDavid Woodhouse 10283ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 1029e2a666d5SRusty Russellelse 1030e2a666d5SRusty Russellmod_sign_cmd = true 1031e2a666d5SRusty Russellendif 1032e2a666d5SRusty Russellexport mod_sign_cmd 1033e2a666d5SRusty Russell 1034056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 1035056d28d1SRolf Eike Beer 10369f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION 10379f0c18aeSJosh Poimboeuf has_libelf := $(call try-run,\ 1038056d28d1SRolf Eike Beer echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 10399f0c18aeSJosh Poimboeuf ifeq ($(has_libelf),1) 10409f0c18aeSJosh Poimboeuf objtool_target := tools/objtool FORCE 10419f0c18aeSJosh Poimboeuf else 10429f0c18aeSJosh Poimboeuf SKIP_STACK_VALIDATION := 1 10439f0c18aeSJosh Poimboeuf export SKIP_STACK_VALIDATION 10449f0c18aeSJosh Poimboeuf endif 10459f0c18aeSJosh Poimboeufendif 10469f0c18aeSJosh Poimboeuf 1047e00d8880SMasahiro YamadaPHONY += prepare0 1048e2a666d5SRusty Russell 1049394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order 1050bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps 105147801c97SMasahiro Yamada 10521da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1053cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvaldsvmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 10561da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 105737d9fe47SFeng Wu $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 10581da177e4SLinus Torvalds 10591eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 10601eaca4b9SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 10611eaca4b9SMasahiro Yamada $(drivers-) $(net-) $(libs-) $(virt-)))) 10621da177e4SLinus Torvalds 1063c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 106476cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1065c99f3918SMasahiro Yamada 1066f49821eeSNicholas Piggininit-y := $(patsubst %/, %/built-in.a, $(init-y)) 1067f49821eeSNicholas Piggincore-y := $(patsubst %/, %/built-in.a, $(core-y)) 1068f49821eeSNicholas Piggindrivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1069f49821eeSNicholas Pigginnet-y := $(patsubst %/, %/built-in.a, $(net-y)) 10707273ad2bSMasahiro Yamadalibs-y2 := $(patsubst %/, %/built-in.a, $(filter %/, $(libs-y))) 10717273ad2bSMasahiro Yamadaifdef CONFIG_MODULES 10727273ad2bSMasahiro Yamadalibs-y1 := $(filter-out %/, $(libs-y)) 10737273ad2bSMasahiro Yamadalibs-y2 += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 10747273ad2bSMasahiro Yamadaelse 10751da177e4SLinus Torvaldslibs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 10767273ad2bSMasahiro Yamadaendif 1077f49821eeSNicholas Pigginvirt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 10781da177e4SLinus Torvalds 10791f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1080d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1081d151e971SMasahiro Yamada $(drivers-y) $(net-y) $(virt-y) 10823a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1) 108395698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 10841f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 108585f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1086233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 10871da177e4SLinus Torvalds 1088d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 10891da177e4SLinus Torvalds 10903fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 10913fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 10922441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 1093c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order 1094ba79d401SNicolas Ferre $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 109586556392SNicolas Pitre "$(MAKE) -f $(srctree)/Makefile vmlinux" 10962441e78bSNicolas Pitreendif 109723121ca2SNicolas Pitre 10981f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 10991f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 11001f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 11011f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS 11021f50b80aSMasahiro Yamada KBUILD_MODULES := 1 11031f50b80aSMasahiro Yamadaendif 11041f50b80aSMasahiro Yamada 110507a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 110607a422bbSMasahiro Yamada 110788694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 110888694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 110988694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 111088694cffSQuentin Perret 111107a422bbSMasahiro Yamada$(autoksyms_h): 111288694cffSQuentin Perret $(call cmd,autoksyms_h) 111323121ca2SNicolas Pitre 1114fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1115fbe6e37dSNicholas Piggin 1116fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1117fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 1118d503ac53SMasahiro Yamada $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1119fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 11202441e78bSNicolas Pitre 11213fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 11221f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 1123741f98feSSam Ravnborg 1124392885eeSMasahiro Yamadatargets := vmlinux 1125392885eeSMasahiro Yamada 11261da177e4SLinus Torvalds# The actual objects are generated when descending, 11271da177e4SLinus Torvalds# make sure no implicit rule kicks in 1128c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ; 11291da177e4SLinus Torvalds 1130ba97df45SMasahiro Yamadafilechk_kernel.release = \ 11310d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 11320d0e7718SMichal Marek 113383a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 113424512795SMasahiro Yamadainclude/config/kernel.release: FORCE 11350d0e7718SMichal Marek $(call filechk,kernel.release) 1136cb58455cSSam Ravnborg 1137d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1138d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1139d8821622SMasahiro Yamada# in parallel 1140d8821622SMasahiro YamadaPHONY += scripts 114160df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1142d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1143cb58455cSSam Ravnborg 11441da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 11455bb78269SSam Ravnborg# or the modules are listed in "prepare". 11465bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 11475bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 11485bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 11491da177e4SLinus Torvalds 1150a5139fb3SMasahiro YamadaPHONY += prepare archprepare 11515bb78269SSam Ravnborg 115236de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 11533044dd05SMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 11543044dd05SMasahiro Yamada include/generated/autoconf.h 11555bb78269SSam Ravnborg 115665bba042SMasahiro Yamadaprepare0: archprepare 115760df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 11588d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 115986feeaa8SSam Ravnborg 11601da177e4SLinus Torvalds# All the preparing.. 1161b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool 1162b9ab5ebbSJosh Poimboeuf 11632c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 11647d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 11657d0e5c20SMasahiro Yamada 11662c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 11672c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1168037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1169037fc336SMasahiro Yamada generic=include/asm-generic 11702c1f4f12SMasahiro Yamadauapi-asm-generic: 1171037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1172037fc336SMasahiro Yamada generic=include/uapi/asm-generic 11732c1f4f12SMasahiro Yamada 1174b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool 11753b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 1176ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1) 1177ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC 1178ef7cfd00SMasahiro Yamada @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1179ef7cfd00SMasahiro Yamada @false 1180ef7cfd00SMasahiro Yamadaelse 1181ef7cfd00SMasahiro Yamada @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1182ef7cfd00SMasahiro Yamadaendif 1183ef7cfd00SMasahiro Yamadaendif 11841da177e4SLinus Torvalds 11851da177e4SLinus Torvalds# Generate some files 11861da177e4SLinus Torvalds# --------------------------------------------------------------------------- 11871da177e4SLinus Torvalds 11881da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 11891da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvaldsuts_len := 64 119263104eecSSam Ravnborgdefine filechk_utsrelease.h 11931da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 11941da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 11951da177e4SLinus Torvalds exit 1; \ 11961da177e4SLinus Torvalds fi; \ 1197ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 11981da177e4SLinus Torvaldsendef 11991da177e4SLinus Torvalds 120063104eecSSam Ravnborgdefine filechk_version.h 1201ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 120278d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1203ad774086SMasahiro Yamada echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 120463104eecSSam Ravnborgendef 120563104eecSSam Ravnborg 120643fee2b2SMasahiro Yamada$(version_h): FORCE 12071da177e4SLinus Torvalds $(call filechk,version.h) 1208223c24a7SMichal Marek $(Q)rm -f $(old_version_h) 12091da177e4SLinus Torvalds 1210273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 121163104eecSSam Ravnborg $(call filechk,utsrelease.h) 121263104eecSSam Ravnborg 1213179efcb4SVegard NossumPHONY += headerdep 1214179efcb4SVegard Nossumheaderdep: 12159663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 12169663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1217179efcb4SVegard Nossum 12181da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12198d730cfbSDavid Woodhouse# Kernel headers 12208d730cfbSDavid Woodhouse 1221e6883b18SSam Ravnborg#Default location for installed headers 1222e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1223e6883b18SSam Ravnborg 122459b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 122559b2bd05SMasahiro Yamada cmd_headers_install = \ 122659b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 122759b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 122859b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 12296d716275SDavid Woodhouse 12308d730cfbSDavid WoodhousePHONY += headers_install 123159b2bd05SMasahiro Yamadaheaders_install: headers 123259b2bd05SMasahiro Yamada $(call cmd,headers_install) 12334f193362SPaul Smith 12341da177e4SLinus TorvaldsPHONY += archheaders archscripts 12351da177e4SLinus Torvalds 1236a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 12371da177e4SLinus Torvalds 123859b2bd05SMasahiro YamadaPHONY += headers 123959b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 12409d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 12412fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1242d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1243d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 12441f85712eSMike Frysinger 12457ecaf069SMasahiro Yamada# Deprecated. It is no-op now. 124668475359SDavid WoodhousePHONY += headers_check 12477ecaf069SMasahiro Yamadaheaders_check: 12487ecaf069SMasahiro Yamada @: 124968475359SDavid Woodhouse 1250e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 125159b2bd05SMasahiro Yamadaprepare: headers 1252e949f4c2SMasahiro Yamadaendif 12531da177e4SLinus Torvalds 1254bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1255bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1256bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1257bdd7714bSMasahiro Yamada 12581da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12595a5da78bSShuah Khan# Kernel selftest 12605a5da78bSShuah Khan 12615a5da78bSShuah KhanPHONY += kselftest 12625a5da78bSShuah Khankselftest: 12632bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 12645a5da78bSShuah Khan 126517eac6c2SShuah Khankselftest-%: FORCE 126617eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1267dcb825a9SWang Long 12683d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 12693d6dee7aSBamvor Jian Zhangkselftest-merge: 12703d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 12716d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 12726d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 12733e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 12743d6dee7aSBamvor Jian Zhang 12755a5da78bSShuah Khan# --------------------------------------------------------------------------- 127637c8a5faSRob Herring# Devicetree files 127737c8a5faSRob Herring 127837c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 127937c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 128037c8a5faSRob Herringendif 128137c8a5faSRob Herring 128237c8a5faSRob Herringifneq ($(dtstree),) 128337c8a5faSRob Herring 1284a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc 128537c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 128637c8a5faSRob Herring 1287c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check 1288b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc 128937c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 129037c8a5faSRob Herring 1291b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1292e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1293b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1294b5154bf6SMasahiro Yamadaendif 1295b5154bf6SMasahiro Yamada 1296b5154bf6SMasahiro Yamadadtbs_check: dtbs 12974f0e3a57SRob Herring 129837c8a5faSRob Herringdtbs_install: 12992431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 130037c8a5faSRob Herring 130137c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 130237c8a5faSRob Herringall: dtbs 130337c8a5faSRob Herringendif 130437c8a5faSRob Herring 130537c8a5faSRob Herringendif 130637c8a5faSRob Herring 130737c8a5faSRob HerringPHONY += scripts_dtc 130837c8a5faSRob Herringscripts_dtc: scripts_basic 130937c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 131037c8a5faSRob Herring 1311e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1312e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1313e10c4321SMasahiro Yamadaendif 1314e10c4321SMasahiro Yamada 1315c473a8d0SMasahiro YamadaPHONY += dt_binding_check 13164f0e3a57SRob Herringdt_binding_check: scripts_dtc 13174f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 13184f0e3a57SRob Herring 131937c8a5faSRob Herring# --------------------------------------------------------------------------- 13201da177e4SLinus Torvalds# Modules 13211da177e4SLinus Torvalds 13221da177e4SLinus Torvaldsifdef CONFIG_MODULES 13231da177e4SLinus Torvalds 13241da177e4SLinus Torvalds# By default, build modules as well 13251da177e4SLinus Torvalds 132673d1393eSMichal Marekall: modules 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds# Build modules 1329551559e1STejun Heo# 1330551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1331551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1332551559e1STejun Heo# using awk while concatenating to the final file. 13331da177e4SLinus Torvalds 13344f193362SPaul SmithPHONY += modules 13358b41fc44SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order 1336b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 13373a48a919SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 13381da177e4SLinus Torvalds 1339c99f3918SMasahiro Yamadamodules.order: descend 1340c99f3918SMasahiro Yamada $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1341a6c36632SMichal Marek 13421da177e4SLinus Torvalds# Target to prepare building external modules 13434f193362SPaul SmithPHONY += modules_prepare 1344059bc9fcSMasahiro Yamadamodules_prepare: prepare 13451da177e4SLinus Torvalds 13461da177e4SLinus Torvalds# Target to install modules 13474f193362SPaul SmithPHONY += modules_install 13481da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 13491da177e4SLinus Torvalds 13504f193362SPaul SmithPHONY += _modinst_ 13512da30e70SMichal Marek_modinst_: 13521da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 13531da177e4SLinus Torvalds @rm -f $(MODLIB)/source 13541da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 13558e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 13561da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 13571da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 13587e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 13591da177e4SLinus Torvalds fi 13601bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 13618b41fc44SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 1362898490c0SAlexey Gladkov @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1363b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 13641da177e4SLinus Torvalds 136550a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 13661da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 13671da177e4SLinus Torvalds# boot script depmod is the master version. 13684f193362SPaul SmithPHONY += _modinst_post 13696d128e1eSLinus Torvalds_modinst_post: _modinst_ 137050a8ec31SSam Ravnborg $(call cmd,depmod) 13711da177e4SLinus Torvalds 1372d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1373d890f510SJosh BoyerPHONY += modules_sign 1374d890f510SJosh Boyermodules_sign: 1375d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1376d890f510SJosh Boyerendif 1377d890f510SJosh Boyer 13781da177e4SLinus Torvaldselse # CONFIG_MODULES 13791da177e4SLinus Torvalds 13801da177e4SLinus Torvalds# Modules not configured 13811da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13821da177e4SLinus Torvalds 1383612e47ceSMasahiro YamadaPHONY += modules modules_install 1384612e47ceSMasahiro Yamadamodules modules_install: 13855369f550SMichal Marek @echo >&2 13865369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 13875369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 13885369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 13895369f550SMichal Marek @echo >&2 13901da177e4SLinus Torvalds @exit 1 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvaldsendif # CONFIG_MODULES 13931da177e4SLinus Torvalds 13941da177e4SLinus Torvalds### 13951da177e4SLinus Torvalds# Cleaning is done on three levels. 13961da177e4SLinus Torvalds# make clean Delete most generated files 13971da177e4SLinus Torvalds# Leave enough to build external modules 13981da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 13991da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 14001da177e4SLinus Torvalds 14011da177e4SLinus Torvalds# Directories & files removed with 'make clean' 14020663c68cSMasahiro YamadaCLEAN_FILES += include/ksym \ 14030663c68cSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps 14041da177e4SLinus Torvalds 14051da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 14060663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 140746a63d4bSMasahiro Yamada arch/$(SRCARCH)/include/generated .tmp_objdiff \ 14080663c68cSMasahiro Yamada debian snap tar-install \ 14090663c68cSMasahiro Yamada .config .config.old .version \ 141046457133SMasahiro Yamada Module.symvers \ 1411fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1412fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 141346a63d4bSMasahiro Yamada signing_key.x509.signer vmlinux-gdb.py \ 141446a63d4bSMasahiro Yamada *.spec 14151da177e4SLinus Torvalds 141646457133SMasahiro Yamada# Directories & files removed with 'make distclean' 141746457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 141846457133SMasahiro Yamada 14191da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 14201da177e4SLinus Torvalds# 14211da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 14221da177e4SLinus Torvalds 142376cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 14241da177e4SLinus Torvalds 1425bd1ee804SPawel Mollvmlinuxclean: 1426bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1427fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1428bd1ee804SPawel Moll 1429bd1ee804SPawel Mollclean: archclean vmlinuxclean 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 14321da177e4SLinus Torvalds# 14331da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1434cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 14351da177e4SLinus Torvalds 1436b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 14371da177e4SLinus Torvalds$(mrproper-dirs): 14381da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 14391da177e4SLinus Torvalds 1440b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 14411da177e4SLinus Torvalds $(call cmd,rmfiles) 14421da177e4SLinus Torvalds 14431da177e4SLinus Torvalds# distclean 14441da177e4SLinus Torvalds# 144546457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 144646457133SMasahiro Yamada 14474f193362SPaul SmithPHONY += distclean 14481da177e4SLinus Torvalds 14491da177e4SLinus Torvaldsdistclean: mrproper 145046457133SMasahiro Yamada $(call cmd,rmfiles) 14511da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 14521da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1453f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1454f78271dfSMasahiro Yamada -o -name 'core' \) \ 14551da177e4SLinus Torvalds -type f -print | xargs rm -f 14561da177e4SLinus Torvalds 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds# Packaging of the kernel to various formats 14591da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14601da177e4SLinus Torvalds 1461bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1462000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1463031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1464000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 14651da177e4SLinus Torvalds 14661da177e4SLinus Torvalds# Brief documentation of the typical targets used 14671da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14681da177e4SLinus Torvalds 14695dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1470a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 14715dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 14725dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 14731da177e4SLinus Torvalds 1474fe69b420SMasahiro YamadaPHONY += help 14751da177e4SLinus Torvaldshelp: 14761da177e4SLinus Torvalds @echo 'Cleaning targets:' 14775ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 14785cc8d246SJesper Juhl @echo ' enough build support to build external modules' 14795ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 14805cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 14811da177e4SLinus Torvalds @echo '' 14821da177e4SLinus Torvalds @echo 'Configuration targets:' 14831da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 14841da177e4SLinus Torvalds @echo '' 14851da177e4SLinus Torvalds @echo 'Other generic targets:' 14861da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 14871da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 14881da177e4SLinus Torvalds @echo '* modules - Build all modules' 14899cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 14901da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 149140ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1492433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1493433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 149462718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 149562718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1496155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1497c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 14981da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 14991da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1500f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 15013f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 15023f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 15033f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 15042fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 150559df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 15062fb9b1bdSSam Ravnborg echo '' 150731b8cc80SRandy Dunlap @echo 'Static analysers:' 15081da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 15091da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1510aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1511ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1512295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 151374425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 15147f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 151574425eeeSNicolas Palix @echo '' 1516eb8305aeSMatthias Maennich @echo 'Tools:' 1517eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1518eb8305aeSMatthias Maennich @echo '' 151931b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1520e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 15215a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 15225a5da78bSShuah Khan @echo ' running kselftest on it' 1523e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1524e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1525e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1526dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1527e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1528e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 15295a5da78bSShuah Khan @echo '' 153037c8a5faSRob Herring @$(if $(dtstree), \ 153137c8a5faSRob Herring echo 'Devicetree:'; \ 153237c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 153337c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 15347aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 15357aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 153637c8a5faSRob Herring echo '') 153737c8a5faSRob Herring 153831b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 153931b8cc80SRandy Dunlap @echo ' use "make tools/help"' 154031b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 154131b8cc80SRandy Dunlap @echo '' 15421da177e4SLinus Torvalds @echo 'Kernel packaging:' 1543000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 15441da177e4SLinus Torvalds @echo '' 15451da177e4SLinus Torvalds @echo 'Documentation targets:' 1546cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 15471da177e4SLinus Torvalds @echo '' 154801dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 15491da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 155001dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 15511da177e4SLinus Torvalds @echo '' 15521da177e4SLinus Torvalds @$(if $(boards), \ 15531da177e4SLinus Torvalds $(foreach b, $(boards), \ 15544234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 15551da177e4SLinus Torvalds echo '') 15565dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 15575dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 15585dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 15595dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 15605dffbe81SSegher Boessenkool echo '') 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 156345d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 15641da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1565a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1566a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1567701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1568af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1569e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 157028bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 157128bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 157228bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1573a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 15741da177e4SLinus Torvalds @echo '' 15751da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 15761da177e4SLinus Torvalds @echo 'For further info see the ./README file' 15771da177e4SLinus Torvalds 15781da177e4SLinus Torvalds 15795dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 15805dffbe81SSegher Boessenkool 15815dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 15825dffbe81SSegher Boessenkool 1583fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 15845dffbe81SSegher Boessenkool 15855dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 15865dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 15875dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 15885dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 15895dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 15905dffbe81SSegher Boessenkool echo '') 15915dffbe81SSegher Boessenkool 15925dffbe81SSegher Boessenkool 15931da177e4SLinus Torvalds# Documentation targets 15941da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1595e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1596e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 159722cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1598bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1599cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 16001da177e4SLinus Torvalds 160167274c08SMasahiro Yamada# Misc 160267274c08SMasahiro Yamada# --------------------------------------------------------------------------- 160367274c08SMasahiro Yamada 160467274c08SMasahiro YamadaPHONY += scripts_gdb 16057a739ce5SMasahiro Yamadascripts_gdb: prepare0 16061e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 16078d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 160867274c08SMasahiro Yamada 160967274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 161067274c08SMasahiro Yamadaall: scripts_gdb 161167274c08SMasahiro Yamadaendif 161267274c08SMasahiro Yamada 16131da177e4SLinus Torvaldselse # KBUILD_EXTMOD 16141da177e4SLinus Torvalds 16151da177e4SLinus Torvalds### 16161da177e4SLinus Torvalds# External module support. 16171da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 16181da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 16191da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 16201da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 16211da177e4SLinus Torvalds# be used. 16221da177e4SLinus Torvalds# 16231da177e4SLinus Torvalds# The following are the only valid targets when building external 16241da177e4SLinus Torvalds# modules. 16251da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 16261da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 16271da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 16281da177e4SLinus Torvalds# make M=dir modules_install 1629070b98bfSSam Ravnborg# Install the modules built in the module directory 16301da177e4SLinus Torvalds# Assumes install directory is already created 16311da177e4SLinus Torvalds 16321da177e4SLinus Torvalds# We are always building modules 16331da177e4SLinus TorvaldsKBUILD_MODULES := 1 16341da177e4SLinus Torvalds 16354f193362SPaul SmithPHONY += $(objtree)/Module.symvers 16361da177e4SLinus Torvalds$(objtree)/Module.symvers: 16371da177e4SLinus Torvalds @test -e $(objtree)/Module.symvers || ( \ 16381da177e4SLinus Torvalds echo; \ 16391da177e4SLinus Torvalds echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 16401da177e4SLinus Torvalds echo " is missing; modules will have no dependencies and modversions."; \ 16411da177e4SLinus Torvalds echo ) 16421da177e4SLinus Torvalds 1643c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 1644c99f3918SMasahiro YamadaPHONY += modules 1645c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers 1646b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 16471da177e4SLinus Torvalds 16484f193362SPaul SmithPHONY += modules_install 1649a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1650a67dc21aSSam Ravnborg 1651a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 16524f193362SPaul SmithPHONY += _emodinst_ 1653a67dc21aSSam Ravnborg_emodinst_: 1654a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1655b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 16561da177e4SLinus Torvalds 16574f193362SPaul SmithPHONY += _emodinst_post 1658a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1659a67dc21aSSam Ravnborg $(call cmd,depmod) 1660a67dc21aSSam Ravnborg 166176cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 1662bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps 16631da177e4SLinus Torvalds 1664fe69b420SMasahiro YamadaPHONY += help 16651da177e4SLinus Torvaldshelp: 16661da177e4SLinus Torvalds @echo ' Building external modules.' 16671da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 16681da177e4SLinus Torvalds @echo '' 16691da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 16701da177e4SLinus Torvalds @echo ' modules_install - install the module' 16711da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 16721da177e4SLinus Torvalds @echo '' 167306300b21SSam Ravnborg 1674059bc9fcSMasahiro YamadaPHONY += prepare 16751da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 16761da177e4SLinus Torvalds 1677b1fbfcb4SMasahiro Yamada# Single targets 1678b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1679b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1680b1fbfcb4SMasahiro Yamada# 1681b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1682b1fbfcb4SMasahiro Yamada# 1683b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1684b1fbfcb4SMasahiro Yamada# 1685b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1686b1fbfcb4SMasahiro Yamada# 1687b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1688b1fbfcb4SMasahiro Yamada 1689b1fbfcb4SMasahiro Yamadaifdef single-build 1690b1fbfcb4SMasahiro Yamada 1691b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1692b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1693b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1694b1fbfcb4SMasahiro Yamada 1695b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost 1696b1fbfcb4SMasahiro Yamada @: 1697b1fbfcb4SMasahiro Yamada$(single-no-ko): descend 1698b1fbfcb4SMasahiro Yamada @: 1699b1fbfcb4SMasahiro Yamada 1700b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1701b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 1702b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1703b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp 1704b1fbfcb4SMasahiro Yamadaendif 1705b1fbfcb4SMasahiro Yamada 1706b1fbfcb4SMasahiro YamadaPHONY += single_modpost 1707b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko) 1708b1fbfcb4SMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 1709b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1710b1fbfcb4SMasahiro Yamada 1711b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1 1712b1fbfcb4SMasahiro Yamada 1713b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1714b1fbfcb4SMasahiro Yamada 1715b1fbfcb4SMasahiro Yamada# trim unrelated directories 1716b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \ 1717b1fbfcb4SMasahiro Yamada $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1718b1fbfcb4SMasahiro Yamada 1719b1fbfcb4SMasahiro Yamadaendif 1720b1fbfcb4SMasahiro Yamada 1721c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1722c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1723c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1724c99f3918SMasahiro Yamada# make menuconfig etc. 1725c99f3918SMasahiro Yamada# Error messages still appears in the original language 1726c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 1727c99f3918SMasahiro Yamadadescend: $(build-dirs) 1728c99f3918SMasahiro Yamada$(build-dirs): prepare 1729b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ \ 1730f566e1fbSMasahiro Yamada single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \ 1731b1fbfcb4SMasahiro Yamada need-builtin=1 need-modorder=1 1732c99f3918SMasahiro Yamada 173376cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 173476cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 173576cd306dSMasahiro Yamada$(clean-dirs): 173676cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 173776cd306dSMasahiro Yamada 173888d7be03SMichal Marekclean: $(clean-dirs) 173988d7be03SMichal Marek $(call cmd,rmfiles) 174043f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1741ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 17424f0e3a57SRob Herring -o -name '*.ko.*' \ 17434f0e3a57SRob Herring -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1744ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 1745bbc55bdeSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 174688d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 17479a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 17484fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 174988d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 17508b41fc44SMasahiro Yamada -o -name '.tmp_*.o.*' \ 17516b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1752433db3e2SVinÃcius Tinti -o -name '*.ll' \ 175388d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 175488d7be03SMichal Marek 17551da177e4SLinus Torvalds# Generate tags for editors 17561da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1757a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1758858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 17591da177e4SLinus Torvalds 1760f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 17611da177e4SLinus Torvalds $(call cmd,tags) 17621da177e4SLinus Torvalds 1763eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1764eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1765eb8305aeSMatthias Maennich 1766eb8305aeSMatthias MaennichPHONY += nsdeps 1767bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1768eb8305aeSMatthias Maennichnsdeps: modules 1769bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1770eb8305aeSMatthias Maennich 17711da177e4SLinus Torvalds# Scripts to check various things for consistency 17721da177e4SLinus Torvalds# --------------------------------------------------------------------------- 17731da177e4SLinus Torvalds 1774279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1775279f3dd3SPeter Foley 17761da177e4SLinus Torvaldsincludecheck: 1777436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 17781da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 177980007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 17801da177e4SLinus Torvalds 17811da177e4SLinus Torvaldsversioncheck: 17822ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 17831da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 178480007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 17851da177e4SLinus Torvalds 178674425eeeSNicolas Palixcoccicheck: 1787858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 178874425eeeSNicolas Palix 17891da177e4SLinus Torvaldsnamespacecheck: 17901da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 17911da177e4SLinus Torvalds 1792295ac051SAdrian Bunkexport_report: 1793295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1794295ac051SAdrian Bunk 1795c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1796e3ccf6e3SJeff Dike 1797011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1798011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1799011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1800011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1801011e3a9aSJeff Dikeifeq ($(ARCH), um) 1802011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1803011e3a9aSJeff Dikeelse 1804011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1805011e3a9aSJeff Dikeendif 18061da177e4SLinus Torvaldscheckstack: 18071da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 180875dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 18091da177e4SLinus Torvalds 18107b8ea53dSAmerigo Wangkernelrelease: 18117b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 181201ab1788SAmerigo Wang 1813cb58455cSSam Ravnborgkernelversion: 18142244cbd8SSam Ravnborg @echo $(KERNELVERSION) 18151da177e4SLinus Torvalds 1816c398ff00SMike Marciniszynimage_name: 1817c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1818c398ff00SMike Marciniszyn 1819ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1820f47a23ceSMasahiro Yamada 1821f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_) 1822f47a23ceSMasahiro Yamadatools_silent=s 1823f47a23ceSMasahiro Yamadaendif 1824f47a23ceSMasahiro Yamada 1825ea01fa9fSBorislav Petkovtools/: FORCE 1826bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 182775dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1828ea01fa9fSBorislav Petkov 1829ea01fa9fSBorislav Petkovtools/%: FORCE 1830bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 183175dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1832ea01fa9fSBorislav Petkov 18331da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 18340663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 18351da177e4SLinus Torvalds 1836bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 183750a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1838569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 18395a144a1aSMasahiro Yamada $(KERNELRELEASE) 184050a8ec31SSam Ravnborg 1841392885eeSMasahiro Yamada# read saved command lines for existing targets 1842392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 18431da177e4SLinus Torvalds 1844b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 18451da177e4SLinus Torvalds 184646b7c492SSZ Lin (林上智)endif # config-build 18472042b548SMasahiro Yamadaendif # mixed-build 1848688931a5SMasahiro Yamadaendif # need-sub-make 18491da177e4SLinus Torvalds 18504f193362SPaul SmithPHONY += FORCE 18511da177e4SLinus TorvaldsFORCE: 18524f193362SPaul Smith 1853bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1854fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 18554f193362SPaul Smith.PHONY: $(PHONY) 1856