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 14121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \ 15121c2a13SMasahiro Yamada $(error targets prefixed with '__' are only for internal use)) 16121c2a13SMasahiro Yamada 17ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 18121c2a13SMasahiro YamadaPHONY := __all 19121c2a13SMasahiro Yamada__all: 20ba634eceSMasahiro Yamada 211da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 221da177e4SLinus Torvalds# to get the ordering right. 231da177e4SLinus Torvalds# 241da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 251da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 261da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 27f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 281da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 291da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 301da177e4SLinus Torvalds# is now up to date. 311da177e4SLinus Torvalds# 321da177e4SLinus Torvalds# The only cases where we need to modify files which have global 331da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 341da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 351da177e4SLinus Torvalds# prepare rule. 361da177e4SLinus Torvalds 37221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 383812b8c5SMasahiro Yamada 393812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 403812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 413812b8c5SMasahiro YamadaMAKEFLAGS += -rR 423812b8c5SMasahiro Yamada 433812b8c5SMasahiro Yamada# Avoid funny character set dependencies 443812b8c5SMasahiro Yamadaunexport LC_ALL 453812b8c5SMasahiro YamadaLC_COLLATE=C 463812b8c5SMasahiro YamadaLC_NUMERIC=C 473812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 483812b8c5SMasahiro Yamada 493812b8c5SMasahiro Yamada# Avoid interference with shell env settings 503812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 513812b8c5SMasahiro Yamada 52066b7ed9SMichal Marek# Beautify output 53066b7ed9SMichal Marek# --------------------------------------------------------------------------- 54066b7ed9SMichal Marek# 55066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 56066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 57066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 58066b7ed9SMichal Marek# 59066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 60066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 61066b7ed9SMichal Marek# 62066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 63066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 64066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 65066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 66066b7ed9SMichal Marek# 67066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 68066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 69066b7ed9SMichal Marek# 70066b7ed9SMichal Marek# $(Q)ln $@ :< 71066b7ed9SMichal Marek# 72066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 73066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 74505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 75066b7ed9SMichal Marek# 761da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 771da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 781da177e4SLinus Torvalds 791da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 801da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 811da177e4SLinus Torvaldsendif 821da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 831da177e4SLinus Torvalds KBUILD_VERBOSE = 0 841da177e4SLinus Torvaldsendif 851da177e4SLinus Torvalds 86066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 87066b7ed9SMichal Marek quiet = 88066b7ed9SMichal Marek Q = 89066b7ed9SMichal Marekelse 90066b7ed9SMichal Marek quiet=quiet_ 91066b7ed9SMichal Marek Q = @ 92066b7ed9SMichal Marekendif 93066b7ed9SMichal Marek 94066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 95066b7ed9SMichal Marek# commands 96066b7ed9SMichal Marek 976f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 98066b7ed9SMichal Marek quiet=silent_ 99066b7ed9SMichal Marekendif 100066b7ed9SMichal Marek 101066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 102066b7ed9SMichal Marek 10325b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 10425b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 10525b146c5SMasahiro Yamada# 10625b146c5SMasahiro Yamada# For example, you can do this: 10725b146c5SMasahiro Yamada# 10825b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 10925b146c5SMasahiro Yamada# 11025b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 11125b146c5SMasahiro Yamada# two syntaxes to specify it. 11225b146c5SMasahiro Yamada# 1131da177e4SLinus Torvalds# 1) O= 1141da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1151da177e4SLinus Torvalds# 1161da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 11725b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 11825b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1191da177e4SLinus Torvalds# 1201da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1211da177e4SLinus Torvalds# variable. 1221da177e4SLinus Torvalds 12325b146c5SMasahiro Yamada# Do we want to change the working directory? 1241da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1251da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1261da177e4SLinus Torvaldsendif 1271da177e4SLinus Torvalds 12825b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 12925b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 13025b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 13125b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 13225b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 13325b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 13425b146c5SMasahiro Yamada 13525b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 13625b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 13725b146c5SMasahiro Yamadaelse 13825b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 13925b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 14025b146c5SMasahiro Yamada 14125b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 14225b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 14325b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 14425b146c5SMasahiro Yamadaelse 14525b146c5SMasahiro Yamadaneed-sub-make := 1 14651193b76SRobert Jarzmikendif 14751193b76SRobert Jarzmik 14825b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 1491da177e4SLinus Torvalds 15025b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 15125b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 15225b146c5SMasahiro Yamadaendif 15325b146c5SMasahiro Yamada 15425b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 15580463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 15680463f1bSMasahiro Yamada# 15780463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed 15825b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make. 15925b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 160688931a5SMasahiro Yamadaneed-sub-make := 1 16125b146c5SMasahiro Yamadaendif 1623812b8c5SMasahiro Yamada 16393fdddfeSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 16493fdddfeSMasahiro Yamada 165688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 166688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 167688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 168688931a5SMasahiro Yamadaneed-sub-make := 1 169688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 17093fdddfeSMasahiro Yamada$(this-makefile): ; 171688931a5SMasahiro Yamadaendif 172688931a5SMasahiro Yamada 17325b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 174221cc2d2SMasahiro Yamadaexport sub_make_done := 1 175221cc2d2SMasahiro Yamada 176688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 177688931a5SMasahiro Yamada 178121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 1790b35786dSMilton Miller 180121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 18116f89098SCharles Keepax @: 1820b35786dSMilton Miller 183c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 184121c2a13SMasahiro Yamada__sub-make: 18525b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 1861da177e4SLinus Torvalds 187688931a5SMasahiro Yamadaendif # need-sub-make 188221cc2d2SMasahiro Yamadaendif # sub_make_done 189688931a5SMasahiro Yamada 1901da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 191688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 1921da177e4SLinus Torvalds 1937ff52571SMasahiro Yamada# Do not print "Entering directory ...", 1947ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 1957ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 1967ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 1977ff52571SMasahiro Yamada 198aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 199aa55c8e2SMasahiro Yamada# C compilation. 200aa55c8e2SMasahiro Yamada# 201aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 202aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 203aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not. 204aa55c8e2SMasahiro Yamada# 205036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details, 206036db11cSCao jin# including where to get the "sparse" utility. 207aa55c8e2SMasahiro Yamada 208aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line") 209aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = $(C) 210aa55c8e2SMasahiro Yamadaendif 211aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC 212aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = 0 213aa55c8e2SMasahiro Yamadaendif 214aa55c8e2SMasahiro Yamada 2157e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 2167e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 217aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line") 218aa55c8e2SMasahiro Yamada KBUILD_EXTMOD := $(M) 219aa55c8e2SMasahiro Yamadaendif 220aa55c8e2SMasahiro Yamada 221e9e81b63SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \ 222e9e81b63SMasahiro Yamada $(error building multiple external modules is not supported)) 223e9e81b63SMasahiro Yamada 224051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD 225051f278eSMasahiro Yamada 226394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 227394053f4SMasahiro Yamada 22825b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2299da0763bSMichal Marek # building in the source tree 2309da0763bSMichal Marek srctree := . 231051f278eSMasahiro Yamada building_out_of_srctree := 2329da0763bSMichal Marekelse 23325b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2349da0763bSMichal Marek # building in a subdirectory of the source tree 2359da0763bSMichal Marek srctree := .. 2369da0763bSMichal Marek else 23725b146c5SMasahiro Yamada srctree := $(abs_srctree) 2389da0763bSMichal Marek endif 239051f278eSMasahiro Yamada building_out_of_srctree := 1 2409da0763bSMichal Marekendif 2412c1f4f12SMasahiro Yamada 24295fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 24395fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 24495fd3f87SMasahiro Yamadaendif 2452c1f4f12SMasahiro Yamada 2467e1c0477SMichal Marekobjtree := . 2476b12de69SMasahiro YamadaVPATH := $(srctree) 2481da177e4SLinus Torvalds 249051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2501da177e4SLinus Torvalds 2512c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2522c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2532c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2542c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2552c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2562c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2572c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2582c1f4f12SMasahiro Yamada 2592c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2602c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h 2612c1f4f12SMasahiro Yamada 26222340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 26322340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2642c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 26559b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 2664623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 2674623980dSDavid Engraf outputmakefile 268a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \ 269a29d4d8cSMasahiro Yamada kernelrelease 270394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 2712c1f4f12SMasahiro Yamada 2722042b548SMasahiro Yamadaconfig-build := 2732042b548SMasahiro Yamadamixed-build := 2742042b548SMasahiro Yamadaneed-config := 1 275d7942413SMasahiro Yamadamay-sync-config := 1 276394053f4SMasahiro Yamadasingle-build := 2772c1f4f12SMasahiro Yamada 2782c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2792c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2802042b548SMasahiro Yamada need-config := 2812c1f4f12SMasahiro Yamada endif 2822c1f4f12SMasahiro Yamadaendif 2832c1f4f12SMasahiro Yamada 284d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 285d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 2862042b548SMasahiro Yamada may-sync-config := 287d7942413SMasahiro Yamada endif 288d7942413SMasahiro Yamadaendif 289d7942413SMasahiro Yamada 290d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 2912042b548SMasahiro Yamada may-sync-config := 292d7942413SMasahiro Yamadaendif 293d7942413SMasahiro Yamada 2942c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 2952c1f4f12SMasahiro Yamada ifneq ($(filter config %config,$(MAKECMDGOALS)),) 2962042b548SMasahiro Yamada config-build := 1 2972c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 2982042b548SMasahiro Yamada mixed-build := 1 2992c1f4f12SMasahiro Yamada endif 3002c1f4f12SMasahiro Yamada endif 3012c1f4f12SMasahiro Yamadaendif 30222340a06SMasahiro Yamada 303394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 304394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 305394053f4SMasahiro Yamada single-build := 1 306394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 307394053f4SMasahiro Yamada mixed-build := 1 308394053f4SMasahiro Yamada endif 309394053f4SMasahiro Yamadaendif 310394053f4SMasahiro Yamada 31122340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 31222340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 31322340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3142042b548SMasahiro Yamada mixed-build := 1 31522340a06SMasahiro Yamada endif 31622340a06SMasahiro Yamadaendif 31722340a06SMasahiro Yamada 3182c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3192c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3202c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3212042b548SMasahiro Yamada mixed-build := 1 3222c1f4f12SMasahiro Yamada endif 3232c1f4f12SMasahiro Yamadaendif 3242c1f4f12SMasahiro Yamada 3252042b548SMasahiro Yamadaifdef mixed-build 3262c1f4f12SMasahiro Yamada# =========================================================================== 3272c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3282c1f4f12SMasahiro Yamada# Handle them one by one. 3292c1f4f12SMasahiro Yamada 3302c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3312c1f4f12SMasahiro Yamada 332121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 3332c1f4f12SMasahiro Yamada @: 3342c1f4f12SMasahiro Yamada 3352c1f4f12SMasahiro Yamada__build_one_by_one: 3362c1f4f12SMasahiro Yamada $(Q)set -e; \ 3372c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3382c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3392c1f4f12SMasahiro Yamada done 3402c1f4f12SMasahiro Yamada 3412042b548SMasahiro Yamadaelse # !mixed-build 3422c1f4f12SMasahiro Yamada 3432c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include 3442c1f4f12SMasahiro Yamada 3452c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3462c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 3472c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3482c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3492c1f4f12SMasahiro Yamada 350b2d35fa5SAnders Roxellinclude scripts/subarch.include 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3531da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3541da177e4SLinus Torvalds# 3551da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3561da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3571da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3581da177e4SLinus Torvalds# make ARCH=ia64 3591da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3601da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3631da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3641da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3651da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3661da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3671da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3681da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3691da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3702331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds# Architecture as present in compile.h 3731da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3746752ed90SThomas GleixnerSRCARCH := $(ARCH) 3751da177e4SLinus Torvalds 376d746d647SSam Ravnborg# Additional ARCH settings for x86 377d746d647SSam Ravnborgifeq ($(ARCH),i386) 378d746d647SSam Ravnborg SRCARCH := x86 379d746d647SSam Ravnborgendif 380d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 381d746d647SSam Ravnborg SRCARCH := x86 382d746d647SSam Ravnborgendif 38374b469f2SSam Ravnborg 3845e538790SSam Ravnborg# Additional ARCH settings for sparc 385e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 386e69f58c0SNamhyung Kim SRCARCH := sparc 387e69f58c0SNamhyung Kimendif 388a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 3895e538790SSam Ravnborg SRCARCH := sparc 390a439fe51SSam Ravnborgendif 3912fb9b1bdSSam Ravnborg 3923cc000b5SPaul Mundt# Additional ARCH settings for sh 3933cc000b5SPaul Mundtifeq ($(ARCH),sh64) 3943cc000b5SPaul Mundt SRCARCH := sh 3953cc000b5SPaul Mundtendif 3963cc000b5SPaul Mundt 39714cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 39841263fc6SBen Gardinerexport KCONFIG_CONFIG 39914cdd3c4SRoman Zippel 4002a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile. 4012a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig 4022a86f661SMasahiro Yamada 4031da177e4SLinus Torvalds# SHELL used by kbuild 404858805b3SMasahiro YamadaCONFIG_SHELL := sh 4051da177e4SLinus Torvalds 4066d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 4076d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 4086d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 409d7f14c66SUwe Kleine-König 410a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 411a0d1c951SMasahiro YamadaHOSTCC = clang 412a0d1c951SMasahiro YamadaHOSTCXX = clang++ 413a0d1c951SMasahiro Yamadaelse 4141da177e4SLinus TorvaldsHOSTCC = gcc 4151da177e4SLinus TorvaldsHOSTCXX = g++ 416a0d1c951SMasahiro Yamadaendif 4177f3a59dbSMasahiro Yamada 4187f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 4197f3a59dbSMasahiro Yamada -O2 -fomit-frame-pointer -std=gnu89 4207f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS := 4217f3a59dbSMasahiro Yamada 4227f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 423735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 424f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 425f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds# Make variables (CC, etc...) 4281da177e4SLinus TorvaldsCPP = $(CC) -E 429a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 430a0d1c951SMasahiro YamadaCC = clang 431a0d1c951SMasahiro YamadaLD = ld.lld 432a0d1c951SMasahiro YamadaAR = llvm-ar 433a0d1c951SMasahiro YamadaNM = llvm-nm 434a0d1c951SMasahiro YamadaOBJCOPY = llvm-objcopy 435a0d1c951SMasahiro YamadaOBJDUMP = llvm-objdump 436a0d1c951SMasahiro YamadaREADELF = llvm-readelf 437a0d1c951SMasahiro YamadaOBJSIZE = llvm-size 438a0d1c951SMasahiro YamadaSTRIP = llvm-strip 439a0d1c951SMasahiro Yamadaelse 440a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 441a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 4421da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4431da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4441da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4451da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 446eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 447a0d1c951SMasahiro YamadaOBJSIZE = $(CROSS_COMPILE)size 448a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 449a0d1c951SMasahiro Yamadaendif 450e83b9f55SAndrii NakryikoPAHOLE = pahole 45173a4f6dbSMasahiro YamadaLEX = flex 45273a4f6dbSMasahiro YamadaYACC = bison 4531da177e4SLinus TorvaldsAWK = awk 454caa27b66SSam RavnborgINSTALLKERNEL := installkernel 4551da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 4561da177e4SLinus TorvaldsPERL = perl 457011bf125SMasahiro YamadaPYTHON = python 458e9781b52SMasahiro YamadaPYTHON3 = python3 4591da177e4SLinus TorvaldsCHECK = sparse 460858805b3SMasahiro YamadaBASH = bash 4611da177e4SLinus Torvalds 46280a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 4636c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 4640c22be07SDouglas AndersonNOSTDINC_FLAGS := 4656588169dSSam RavnborgCFLAGS_MODULE = 4666588169dSSam RavnborgAFLAGS_MODULE = 4676588169dSSam RavnborgLDFLAGS_MODULE = 4681da177e4SLinus TorvaldsCFLAGS_KERNEL = 4691da177e4SLinus TorvaldsAFLAGS_KERNEL = 470b36fad65SMichal MarekLDFLAGS_vmlinux = 4711da177e4SLinus Torvalds 472abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 473abbf1590SDavid HowellsUSERINCLUDE := \ 4749d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 4759d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 476abbf1590SDavid Howells -I$(srctree)/include/uapi \ 4773308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 478abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 479abbf1590SDavid Howells 4801da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 4811da177e4SLinus Torvalds# Needed to be compatible with the O= option 482abbf1590SDavid HowellsLINUXINCLUDE := \ 4839d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 4849d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 485051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 486f8224f7fSMasahiro Yamada -I$(objtree)/include \ 487f8224f7fSMasahiro Yamada $(USERINCLUDE) 4881da177e4SLinus Torvalds 48942a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 490eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 49142a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 492b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 49351b97e35SKirill A. Shutemov -Wno-format-security \ 494433dc2ebSMasahiro Yamada -std=gnu89 495433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 49680c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 49780c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 4986588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 4996588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 50010df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 50110df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds 502d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 503433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS := 5045241ab4cSMasahiro YamadaCLANG_FLAGS := 5051da177e4SLinus Torvalds 506aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC 507eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL 50894f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 5097bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 5101da177e4SLinus Torvalds 511d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 5120e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 5130e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 514222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 5156588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 51680c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds# Files to ignore in find ... statements 5191da177e4SLinus Torvalds 520ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 521ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 522ae63b2d7SPrarit Bhargava -prune -o 523450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 524450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds# =========================================================================== 5271da177e4SLinus Torvalds# Rules shared between *config targets and build targets 5281da177e4SLinus Torvalds 529312a3d09SCao jin# Basic helpers built in scripts/basic/ 5304f193362SPaul SmithPHONY += scripts_basic 5311da177e4SLinus Torvaldsscripts_basic: 5321da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 533638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 5341da177e4SLinus Torvalds 5354f193362SPaul SmithPHONY += outputmakefile 536e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 537fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 538fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 539fd5f0cd6SJan Beulich# output directory. 5403a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 5413a51ff34SVladimir Kondratiev# ignore whole output directory 5421da177e4SLinus Torvaldsoutputmakefile: 543051f278eSMasahiro Yamadaifdef building_out_of_srctree 544e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 545e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 546e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 547e8e83a23SMasahiro Yamada echo >&2 "***"; \ 548e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 549e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 550e8e83a23SMasahiro Yamada echo >&2 "***"; \ 551e8e83a23SMasahiro Yamada false; \ 552e8e83a23SMasahiro Yamada fi 55392979997SAndi Kleen $(Q)ln -fsn $(srctree) source 5544fd61277SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 555156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 556156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 557fd5f0cd6SJan Beulichendif 5581da177e4SLinus Torvalds 55999516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 560ae6b289aSChris Friesifneq ($(CROSS_COMPILE),) 5615241ab4cSMasahiro YamadaCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 562ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 563238bcbc4SMasahiro YamadaCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 564ef8c4ed9SStefan AgnerGCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 565ae6b289aSChris Friesendif 566ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),) 567238bcbc4SMasahiro YamadaCLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 568ae6b289aSChris Friesendif 5697e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1) 570238bcbc4SMasahiro YamadaCLANG_FLAGS += -no-integrated-as 571876a0600SNathan Chancellorendif 572589834b3SNathan ChancellorCLANG_FLAGS += -Werror=unknown-warning-option 573238bcbc4SMasahiro YamadaKBUILD_CFLAGS += $(CLANG_FLAGS) 574238bcbc4SMasahiro YamadaKBUILD_AFLAGS += $(CLANG_FLAGS) 5753bd98050SJoel Stanleyexport CLANG_FLAGS 576ae6b289aSChris Friesendif 577ae6b289aSChris Fries 578315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 579315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 580315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 581315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade. 582902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 583315bab4eSMasahiro Yamada 5842042b548SMasahiro Yamadaifdef config-build 5851da177e4SLinus Torvalds# =========================================================================== 5861da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 5871da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 5881da177e4SLinus Torvalds 5891da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 5901da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 5911da177e4SLinus Torvalds# used for 'make defconfig' 592a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 593315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 5941da177e4SLinus Torvalds 59536de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 59631110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 59731110ebbSSam Ravnborg 59836de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 5991da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 6001da177e4SLinus Torvalds 6012042b548SMasahiro Yamadaelse #!config-build 6021da177e4SLinus Torvalds# =========================================================================== 6031da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 6041da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 6051da177e4SLinus Torvalds 6062c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 607121c2a13SMasahiro Yamada# but instead __all depend on modules 6082c1f4f12SMasahiro YamadaPHONY += all 6092c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 610121c2a13SMasahiro Yamada__all: all 6112c1f4f12SMasahiro Yamadaelse 612121c2a13SMasahiro Yamada__all: modules 6132c1f4f12SMasahiro Yamadaendif 6142c1f4f12SMasahiro Yamada 6152c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 6162c1f4f12SMasahiro Yamada# Normally, just do built-in. 6172c1f4f12SMasahiro Yamada 6182c1f4f12SMasahiro YamadaKBUILD_MODULES := 6192c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 6202c1f4f12SMasahiro Yamada 6212c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 6222c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 6234b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 6242c1f4f12SMasahiro Yamadaendif 6252c1f4f12SMasahiro Yamada 6262c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 6272c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 6282c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 6292c1f4f12SMasahiro Yamada 630121c2a13SMasahiro Yamadaifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),) 6312c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6322c1f4f12SMasahiro Yamadaendif 6332c1f4f12SMasahiro Yamada 6342c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 6352c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6362c1f4f12SMasahiro Yamadaendif 6372c1f4f12SMasahiro Yamada 6382c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 6392c1f4f12SMasahiro Yamada 6402042b548SMasahiro Yamadaifdef need-config 641d93a18f2SMasahiro Yamadainclude include/config/auto.conf 642d93a18f2SMasahiro Yamadaendif 643d93a18f2SMasahiro Yamada 6441da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 6451da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 646*23febe37SMasahiro Yamadacore-y := init/ usr/ 647f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 648d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 6491da177e4SLinus Torvaldsnet-y := net/ 6501da177e4SLinus Torvaldslibs-y := lib/ 65137d9fe47SFeng Wuvirt-y := virt/ 6521da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 6531da177e4SLinus Torvalds 654315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 655315bab4eSMasahiro Yamada# command line. 656315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 657315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 658315bab4eSMasahiro Yamadaall: vmlinux 659315bab4eSMasahiro Yamada 660315bab4eSMasahiro YamadaCFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 661315bab4eSMasahiro Yamada $(call cc-option,-fno-tree-loop-im) \ 662315bab4eSMasahiro Yamada $(call cc-disable-warning,maybe-uninitialized,) 6635aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 664315bab4eSMasahiro Yamada 665b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 666b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 667b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 668b1f4ff74SPaulo Zanoniendif 669b1f4ff74SPaulo Zanoni 670669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 671669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 672669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 673669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 674669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 675669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 676669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS 677669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS 678669e06b1SMasahiro Yamada 679315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 680315bab4eSMasahiro Yamada 6812042b548SMasahiro Yamadaifdef need-config 6822042b548SMasahiro Yamadaifdef may-sync-config 683315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 684315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 685315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 686d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 6871da177e4SLinus Torvalds 68805850719SMasahiro Yamada$(KCONFIG_CONFIG): 68905850719SMasahiro Yamada @echo >&2 '***' 69005850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 69105850719SMasahiro Yamada @echo >&2 '***' 69205850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 69305850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 69405850719SMasahiro Yamada @echo >&2 '***' 69505850719SMasahiro Yamada @/bin/false 6961da177e4SLinus Torvalds 69761277981SUlf Magnusson# The actual configuration files used during the build are stored in 69861277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 69961277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 7009390dff6SMasahiro Yamada# 7019390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 7029390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 703f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 7043044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) 705911a91c3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 7062042b548SMasahiro Yamadaelse # !may-sync-config 707d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 708d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 709d7942413SMasahiro Yamada# Use auto.conf to trigger the test 7109ee4e336SSam RavnborgPHONY += include/config/auto.conf 7119ee4e336SSam Ravnborg 7129ee4e336SSam Ravnborginclude/config/auto.conf: 713264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 7145369f550SMichal Marek echo >&2; \ 7155369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 7165369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 7175369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 7185369f550SMichal Marek echo >&2 ; \ 7199ee4e336SSam Ravnborg /bin/false) 7209ee4e336SSam Ravnborg 721d7942413SMasahiro Yamadaendif # may-sync-config 7222042b548SMasahiro Yamadaendif # need-config 7231da177e4SLinus Torvalds 724a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 725ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 726bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 727bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 7286f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 729a1c48bb1SGeert Uytterhoeven 73015f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 731a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 73215f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 73315f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3 73415f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 73515f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 7361da177e4SLinus Torvaldsendif 7371da177e4SLinus Torvalds 73869102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 73969102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 740b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 74169102311SJiri Kosina 742d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov 7436b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins 7446b90bd4bSEmese Revfy 7451873e870SAndi Kleenifdef CONFIG_READABLE_ASM 7461873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 7471873e870SAndi Kleen# reorder blocks reorders the control in the function 7481873e870SAndi Kleen# ipa clone creates specialized cloned functions 7491873e870SAndi Kleen# partial inlining inlines only parts of functions 7501873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 7511873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 7521873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 7531873e870SAndi Kleenendif 7541873e870SAndi Kleen 75508f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 756a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 75735bb5b1eSAndi Kleenendif 75835bb5b1eSAndi Kleen 7592a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 760050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 761050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 7622a61f474SMasahiro Yamada 7632a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 764e06b8b98SSam Ravnborg 765076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 766a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 767a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier 768a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 769cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 770cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names. 771cfe17c9bSMasahiro Yamada# See modpost pattern 2 772a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge 773cfe17c9bSMasahiro Yamadaelse 774cfe17c9bSMasahiro Yamada 775cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build. 776cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 7779df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable 778e2079e93SNathan Chancellor 779e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement. 780e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and 781e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 782e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 783cfe17c9bSMasahiro Yamadaendif 784cfe17c9bSMasahiro Yamada 7850a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 7861da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 787a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 7881da177e4SLinus Torvaldselse 7897e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 7907e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 7917e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 7927e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 7937e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 7947e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 795a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 7961da177e4SLinus Torvaldsendif 7977e9501fdSRabin Vincentendif 7981da177e4SLinus Torvalds 799709a972eSKees Cook# Initialize all stack variables with a pattern, if desired. 800709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL 801709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 802709a972eSKees Cookendif 803709a972eSKees Cook 8041e88e415SMasahiro YamadaDEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 8052062afb4SLinus Torvalds 8061da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 807866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 8089d937444SMasahiro YamadaDEBUG_CFLAGS += -gsplit-dwarf 809866ced95SAndi Kleenelse 8101e88e415SMasahiro YamadaDEBUG_CFLAGS += -g 811866ced95SAndi Kleenendif 8122288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 8131da177e4SLinus Torvaldsendif 814bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 8159d937444SMasahiro YamadaDEBUG_CFLAGS += -gdwarf-4 816bfaf2dd3SAndi Kleenendif 8171da177e4SLinus Torvalds 818d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 8191e88e415SMasahiro YamadaDEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 820e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 821d6f4ceb7SAndi Kleenendif 822d6f4ceb7SAndi Kleen 82310e68b02SNick Desaulniersifdef CONFIG_DEBUG_INFO_COMPRESSED 82410e68b02SNick DesaulniersDEBUG_CFLAGS += -gz=zlib 82510e68b02SNick DesaulniersKBUILD_AFLAGS += -Wa,--compress-debug-sections=zlib 82610e68b02SNick DesaulniersKBUILD_LDFLAGS += --compress-debug-sections=zlib 82710e68b02SNick Desaulniersendif 82810e68b02SNick Desaulniers 8291e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS) 8301e88e415SMasahiro Yamadaexport DEBUG_CFLAGS 8311e88e415SMasahiro Yamada 832606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 83307d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD 83407d04081SVasily Gorbik # gcc 5 supports generating the mcount tables directly 83507d04081SVasily Gorbik ifeq ($(call cc-option-yn,-mrecord-mcount),y) 83607d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 83707d04081SVasily Gorbik export CC_USING_RECORD_MCOUNT := 1 838a2546faeSSteven Rostedt endif 8392f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 8402f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 8412f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 8422f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 8432f4df001SVasily Gorbik endif 8442f4df001SVasily Gorbik endif 84507d04081SVasily Gorbikendif 846a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 847f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 848f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 849f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 850a2546faeSSteven Rostedt endif 851f28bc3c3SVasily Gorbikendif 852f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 853f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 854f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 85572441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 856cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 85772441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 85872441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 85972441cb1SSteven Rostedt endif 86072441cb1SSteven Rostedtendif 86116444a8aSArnaldo Carvalho de Meloendif 86216444a8aSArnaldo Carvalho de Melo 86391341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 86491341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 86591341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 86691341d4bSSam Ravnborgendif 86791341d4bSSam Ravnborg 86890ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 869e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 870e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 87190ad4052SMasahiro Yamadaendif 87290ad4052SMasahiro Yamada 87343bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH 87443bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 87543bd3a95SMiroslav Benesendif 87643bd3a95SMiroslav Benes 877e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 878e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 879e8e69931SSam Ravnborg 8801da177e4SLinus Torvalds# warn about C99 declaration after statement 881a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 8821da177e4SLinus Torvalds 8830bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 8848289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 8850bb95f80SKees Cook 886070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 887fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 8881da177e4SLinus Torvalds 889217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 890217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 891217c3e01SStephen Rothwell 8925c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 8935c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) 89444720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) 8955a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 8965c45de21SLinus Torvalds 897adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 898adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 899adc71920SLinus Torvalds 90078a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 90178a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) 90278a5255fSLinus Torvalds 903fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 904a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 905d0115552SLinus Torvalds 90687e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this 90787e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we 90887e0d4f0SDaniel Borkmann# need to disable it here generally. 90987e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 91087e0d4f0SDaniel Borkmann 91187e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine 91287e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled. 91387e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 91487e0d4f0SDaniel Borkmann 9153ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 9163ce120b1SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 9173ce120b1SLinus Torvalds 9188f7f5c9fSAndi Kleen# conserve stack if available 9198f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 9208f7f5c9fSAndi Kleen 921fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 922fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 923fe7c36c7SJosh Triplett 924ea8daa7bSDaniel Wagner# enforce correct pointer usage 925ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 926ea8daa7bSDaniel Wagner 927c834f0e8SKees Cook# Require designated initializers for all marked structures 928c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 929c834f0e8SKees Cook 930a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 931a73619a8SMasahiro YamadaKBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 932a73619a8SMasahiro Yamada 93329be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is 93429be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern 93529be86d7SSeth Forsheeifdef CONFIG_RETPOLINE 93629be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 93729be86d7SSeth Forsheeendif 93829be86d7SSeth Forshee 939a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan 940a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn 941c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan 942a86fe353SMasahiro Yamada 9438cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 9448cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 9458cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 9468cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 94752bcc330SSam Ravnborg 94889ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id 94989ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id 95018991197SRoland McGrath 9515d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 952d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 9535d7d18f5SDavid Howellsendif 9545d7d18f5SDavid Howells 9555cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 9565cf896fbSPeter CollingbourneLDFLAGS_vmlinux += --pack-dyn-relocs=relr 9575cf896fbSPeter Collingbourneendif 9585cf896fbSPeter Collingbourne 9597f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 9607f3a59dbSMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS)) 9617f3a59dbSMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS)) 9627f3a59dbSMasahiro Yamada 96380591e61SLuc Van Oostenryck# make the checker run with the right architecture 96480591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 96580591e61SLuc Van Oostenryck 96614516765SLuc Van Oostenryck# insure the checker run with the right endianness 96714516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 96814516765SLuc Van Oostenryck 9691f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 9701f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 9711f2f01b1SLuc Van Oostenryck 9721da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 9731da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 9741da177e4SLinus Torvalds# set in the environment 9751da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 9761da177e4SLinus Torvalds# this default value 9771da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds# 9801da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 9811da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 9821da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 9831da177e4SLinus Torvalds 9841da177e4SLinus Torvalds# 985f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 986f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 987f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 988f4d4ffc0SJason Cooper# 989f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 990f4d4ffc0SJason Cooper 991f4d4ffc0SJason Cooper# 9921da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 9931da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 994070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 9951da177e4SLinus Torvalds# 9961da177e4SLinus Torvalds 997df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 9981da177e4SLinus Torvaldsexport MODLIB 9991da177e4SLinus Torvalds 1000ac031f26STheodore Ts'o# 10012ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 10022ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 10032ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 1004177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 10052ea03891SSam Ravnborg 1006ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 1007ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 10082ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 1009ac031f26STheodore Ts'oelse 10102ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 1011ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 1012ac031f26STheodore Ts'oelse 10132ea03891SSam Ravnborgmod_strip_cmd = true 1014ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 1015ac031f26STheodore Ts'oexport mod_strip_cmd 1016ac031f26STheodore Ts'o 1017beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 1018beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 1019beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ. 1020beb50df3SBertrand Jacquin 1021beb50df3SBertrand Jacquinmod_compress_cmd = true 1022beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS 1023beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_GZIP 10243d1450d5SJason A. Donenfeld mod_compress_cmd = gzip -n -f 1025beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_GZIP 1026beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_XZ 10273d1450d5SJason A. Donenfeld mod_compress_cmd = xz -f 1028beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_XZ 1029beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS 1030beb50df3SBertrand Jacquinexport mod_compress_cmd 1031beb50df3SBertrand Jacquin 1032d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 10333ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY)) 10343ee550f1SDavid Woodhouse 10353ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 1036e2a666d5SRusty Russellelse 1037e2a666d5SRusty Russellmod_sign_cmd = true 1038e2a666d5SRusty Russellendif 1039e2a666d5SRusty Russellexport mod_sign_cmd 1040e2a666d5SRusty Russell 1041056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 1042056d28d1SRolf Eike Beer 10439f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION 10449f0c18aeSJosh Poimboeuf has_libelf := $(call try-run,\ 1045056d28d1SRolf Eike Beer echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 10469f0c18aeSJosh Poimboeuf ifeq ($(has_libelf),1) 10479f0c18aeSJosh Poimboeuf objtool_target := tools/objtool FORCE 10489f0c18aeSJosh Poimboeuf else 10499f0c18aeSJosh Poimboeuf SKIP_STACK_VALIDATION := 1 10509f0c18aeSJosh Poimboeuf export SKIP_STACK_VALIDATION 10519f0c18aeSJosh Poimboeuf endif 10529f0c18aeSJosh Poimboeufendif 10539f0c18aeSJosh Poimboeuf 1054e00d8880SMasahiro YamadaPHONY += prepare0 1055e2a666d5SRusty Russell 1056394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order 1057bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps 105847801c97SMasahiro Yamada 10591da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1060cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 10611da177e4SLinus Torvalds 1062*23febe37SMasahiro Yamadavmlinux-dirs := $(patsubst %/,%,$(filter %/, \ 10631da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 106437d9fe47SFeng Wu $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 10651da177e4SLinus Torvalds 10661eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 1067*23febe37SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(core-) \ 10681eaca4b9SMasahiro Yamada $(drivers-) $(net-) $(libs-) $(virt-)))) 10691da177e4SLinus Torvalds 1070c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 107176cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1072c99f3918SMasahiro Yamada 1073f49821eeSNicholas Piggincore-y := $(patsubst %/, %/built-in.a, $(core-y)) 1074f49821eeSNicholas Piggindrivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1075f49821eeSNicholas Pigginnet-y := $(patsubst %/, %/built-in.a, $(net-y)) 10767273ad2bSMasahiro Yamadalibs-y2 := $(patsubst %/, %/built-in.a, $(filter %/, $(libs-y))) 10777273ad2bSMasahiro Yamadaifdef CONFIG_MODULES 10787273ad2bSMasahiro Yamadalibs-y1 := $(filter-out %/, $(libs-y)) 10797273ad2bSMasahiro Yamadalibs-y2 += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 10807273ad2bSMasahiro Yamadaelse 10811da177e4SLinus Torvaldslibs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 10827273ad2bSMasahiro Yamadaendif 1083f49821eeSNicholas Pigginvirt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 10841da177e4SLinus Torvalds 10851f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1086*23febe37SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(core-y) $(libs-y2) \ 1087d151e971SMasahiro Yamada $(drivers-y) $(net-y) $(virt-y) 10883a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1) 108995698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 10901f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 109185f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1092233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 10931da177e4SLinus Torvalds 1094d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 10951da177e4SLinus Torvalds 10963fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 10973fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 10982441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 10991f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 11001f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 11011f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 11021f50b80aSMasahiro YamadaKBUILD_MODULES := 1 1103fb2d99beSMasahiro Yamada 1104fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order 1105fb2d99beSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1106fb2d99beSMasahiro Yamada "$(MAKE) -f $(srctree)/Makefile vmlinux" 11071f50b80aSMasahiro Yamadaendif 11081f50b80aSMasahiro Yamada 110907a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 111007a422bbSMasahiro Yamada 111188694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 111288694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 111388694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 111488694cffSQuentin Perret 111507a422bbSMasahiro Yamada$(autoksyms_h): 111688694cffSQuentin Perret $(call cmd,autoksyms_h) 111723121ca2SNicolas Pitre 1118fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1119fbe6e37dSNicholas Piggin 1120fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1121fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 1122d503ac53SMasahiro Yamada $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1123fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 11242441e78bSNicolas Pitre 11253fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 11261f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 1127741f98feSSam Ravnborg 1128392885eeSMasahiro Yamadatargets := vmlinux 1129392885eeSMasahiro Yamada 11301da177e4SLinus Torvalds# The actual objects are generated when descending, 11311da177e4SLinus Torvalds# make sure no implicit rule kicks in 1132c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ; 11331da177e4SLinus Torvalds 1134ba97df45SMasahiro Yamadafilechk_kernel.release = \ 11350d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 11360d0e7718SMichal Marek 113783a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 113824512795SMasahiro Yamadainclude/config/kernel.release: FORCE 11390d0e7718SMichal Marek $(call filechk,kernel.release) 1140cb58455cSSam Ravnborg 1141d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1142d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1143d8821622SMasahiro Yamada# in parallel 1144d8821622SMasahiro YamadaPHONY += scripts 114560df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1146d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1147cb58455cSSam Ravnborg 11481da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 11495bb78269SSam Ravnborg# or the modules are listed in "prepare". 11505bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 11515bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 11525bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 11531da177e4SLinus Torvalds 1154a5139fb3SMasahiro YamadaPHONY += prepare archprepare 11555bb78269SSam Ravnborg 115636de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 11573044dd05SMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 11583044dd05SMasahiro Yamada include/generated/autoconf.h 11595bb78269SSam Ravnborg 116065bba042SMasahiro Yamadaprepare0: archprepare 116160df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 11628d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 116386feeaa8SSam Ravnborg 11641da177e4SLinus Torvalds# All the preparing.. 1165b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool 1166b9ab5ebbSJosh Poimboeuf 11672c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 11687d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 11697d0e5c20SMasahiro Yamada 11702c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 11712c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1172037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1173037fc336SMasahiro Yamada generic=include/asm-generic 11742c1f4f12SMasahiro Yamadauapi-asm-generic: 1175037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1176037fc336SMasahiro Yamada generic=include/uapi/asm-generic 11772c1f4f12SMasahiro Yamada 1178b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool 11793b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 1180ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1) 1181ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC 1182ef7cfd00SMasahiro Yamada @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1183ef7cfd00SMasahiro Yamada @false 1184ef7cfd00SMasahiro Yamadaelse 1185ef7cfd00SMasahiro Yamada @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1186ef7cfd00SMasahiro Yamadaendif 1187ef7cfd00SMasahiro Yamadaendif 11881da177e4SLinus Torvalds 11891da177e4SLinus Torvalds# Generate some files 11901da177e4SLinus Torvalds# --------------------------------------------------------------------------- 11911da177e4SLinus Torvalds 11921da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 11931da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 11941da177e4SLinus Torvalds 11951da177e4SLinus Torvaldsuts_len := 64 119663104eecSSam Ravnborgdefine filechk_utsrelease.h 11971da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 11981da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 11991da177e4SLinus Torvalds exit 1; \ 12001da177e4SLinus Torvalds fi; \ 1201ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 12021da177e4SLinus Torvaldsendef 12031da177e4SLinus Torvalds 120463104eecSSam Ravnborgdefine filechk_version.h 1205ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 120678d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1207ad774086SMasahiro Yamada echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 120863104eecSSam Ravnborgendef 120963104eecSSam Ravnborg 121043fee2b2SMasahiro Yamada$(version_h): FORCE 12111da177e4SLinus Torvalds $(call filechk,version.h) 1212223c24a7SMichal Marek $(Q)rm -f $(old_version_h) 12131da177e4SLinus Torvalds 1214273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 121563104eecSSam Ravnborg $(call filechk,utsrelease.h) 121663104eecSSam Ravnborg 1217179efcb4SVegard NossumPHONY += headerdep 1218179efcb4SVegard Nossumheaderdep: 12199663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 12209663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1221179efcb4SVegard Nossum 12221da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12238d730cfbSDavid Woodhouse# Kernel headers 12248d730cfbSDavid Woodhouse 1225e6883b18SSam Ravnborg#Default location for installed headers 1226e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1227e6883b18SSam Ravnborg 122859b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 122959b2bd05SMasahiro Yamada cmd_headers_install = \ 123059b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 123159b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 123259b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 12336d716275SDavid Woodhouse 12348d730cfbSDavid WoodhousePHONY += headers_install 123559b2bd05SMasahiro Yamadaheaders_install: headers 123659b2bd05SMasahiro Yamada $(call cmd,headers_install) 12374f193362SPaul Smith 12381da177e4SLinus TorvaldsPHONY += archheaders archscripts 12391da177e4SLinus Torvalds 1240a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 12411da177e4SLinus Torvalds 124259b2bd05SMasahiro YamadaPHONY += headers 124359b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 12449d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 12452fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1246d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1247d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 12481f85712eSMike Frysinger 12497ecaf069SMasahiro Yamada# Deprecated. It is no-op now. 125068475359SDavid WoodhousePHONY += headers_check 12517ecaf069SMasahiro Yamadaheaders_check: 12527ecaf069SMasahiro Yamada @: 125368475359SDavid Woodhouse 1254e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 125559b2bd05SMasahiro Yamadaprepare: headers 1256e949f4c2SMasahiro Yamadaendif 12571da177e4SLinus Torvalds 1258bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1259bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1260bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1261bdd7714bSMasahiro Yamada 12621da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12635a5da78bSShuah Khan# Kernel selftest 12645a5da78bSShuah Khan 12655a5da78bSShuah KhanPHONY += kselftest 12665a5da78bSShuah Khankselftest: 12672bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 12685a5da78bSShuah Khan 126917eac6c2SShuah Khankselftest-%: FORCE 127017eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1271dcb825a9SWang Long 12723d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 12733d6dee7aSBamvor Jian Zhangkselftest-merge: 12743d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 12756d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 12766d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 12773e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 12783d6dee7aSBamvor Jian Zhang 12795a5da78bSShuah Khan# --------------------------------------------------------------------------- 128037c8a5faSRob Herring# Devicetree files 128137c8a5faSRob Herring 128237c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 128337c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 128437c8a5faSRob Herringendif 128537c8a5faSRob Herring 128637c8a5faSRob Herringifneq ($(dtstree),) 128737c8a5faSRob Herring 1288a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc 128937c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 129037c8a5faSRob Herring 1291c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check 1292b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc 129337c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 129437c8a5faSRob Herring 1295b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1296e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1297b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1298b5154bf6SMasahiro Yamadaendif 1299b5154bf6SMasahiro Yamada 1300b5154bf6SMasahiro Yamadadtbs_check: dtbs 13014f0e3a57SRob Herring 130237c8a5faSRob Herringdtbs_install: 13032431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 130437c8a5faSRob Herring 130537c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 130637c8a5faSRob Herringall: dtbs 130737c8a5faSRob Herringendif 130837c8a5faSRob Herring 130937c8a5faSRob Herringendif 131037c8a5faSRob Herring 131137c8a5faSRob HerringPHONY += scripts_dtc 131237c8a5faSRob Herringscripts_dtc: scripts_basic 131337c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 131437c8a5faSRob Herring 1315e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1316e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1317e10c4321SMasahiro Yamadaendif 1318e10c4321SMasahiro Yamada 1319c473a8d0SMasahiro YamadaPHONY += dt_binding_check 13204f0e3a57SRob Herringdt_binding_check: scripts_dtc 13214f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 13224f0e3a57SRob Herring 132337c8a5faSRob Herring# --------------------------------------------------------------------------- 13241da177e4SLinus Torvalds# Modules 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvaldsifdef CONFIG_MODULES 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds# By default, build modules as well 13291da177e4SLinus Torvalds 133073d1393eSMichal Marekall: modules 13311da177e4SLinus Torvalds 13324b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider 13334b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to 13344b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them. 13354b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS 13364b50c8c4SMasahiro Yamada KBUILD_BUILTIN := 1 13374b50c8c4SMasahiro Yamadaendif 13384b50c8c4SMasahiro Yamada 13391da177e4SLinus Torvalds# Build modules 1340551559e1STejun Heo# 1341551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1342551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1343551559e1STejun Heo# using awk while concatenating to the final file. 13441da177e4SLinus Torvalds 13454f193362SPaul SmithPHONY += modules 13468451791dSMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check 1347b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 13488451791dSMasahiro Yamada 13498451791dSMasahiro YamadaPHONY += modules_check 13508451791dSMasahiro Yamadamodules_check: modules.order 13518451791dSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 13521da177e4SLinus Torvalds 1353c99f3918SMasahiro Yamadamodules.order: descend 1354c99f3918SMasahiro Yamada $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1355a6c36632SMichal Marek 13561da177e4SLinus Torvalds# Target to prepare building external modules 13574f193362SPaul SmithPHONY += modules_prepare 1358059bc9fcSMasahiro Yamadamodules_prepare: prepare 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds# Target to install modules 13614f193362SPaul SmithPHONY += modules_install 13621da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 13631da177e4SLinus Torvalds 13644f193362SPaul SmithPHONY += _modinst_ 13652da30e70SMichal Marek_modinst_: 13661da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 13671da177e4SLinus Torvalds @rm -f $(MODLIB)/source 13681da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 13698e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 13701da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 13711da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 13727e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 13731da177e4SLinus Torvalds fi 13741bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 13758b41fc44SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 1376898490c0SAlexey Gladkov @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1377b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 13781da177e4SLinus Torvalds 137950a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 13801da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 13811da177e4SLinus Torvalds# boot script depmod is the master version. 13824f193362SPaul SmithPHONY += _modinst_post 13836d128e1eSLinus Torvalds_modinst_post: _modinst_ 138450a8ec31SSam Ravnborg $(call cmd,depmod) 13851da177e4SLinus Torvalds 1386d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1387d890f510SJosh BoyerPHONY += modules_sign 1388d890f510SJosh Boyermodules_sign: 1389d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1390d890f510SJosh Boyerendif 1391d890f510SJosh Boyer 13921da177e4SLinus Torvaldselse # CONFIG_MODULES 13931da177e4SLinus Torvalds 13941da177e4SLinus Torvalds# Modules not configured 13951da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13961da177e4SLinus Torvalds 1397612e47ceSMasahiro YamadaPHONY += modules modules_install 1398612e47ceSMasahiro Yamadamodules modules_install: 13995369f550SMichal Marek @echo >&2 14005369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 14015369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 14025369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 14035369f550SMichal Marek @echo >&2 14041da177e4SLinus Torvalds @exit 1 14051da177e4SLinus Torvalds 14061da177e4SLinus Torvaldsendif # CONFIG_MODULES 14071da177e4SLinus Torvalds 14081da177e4SLinus Torvalds### 14091da177e4SLinus Torvalds# Cleaning is done on three levels. 14101da177e4SLinus Torvalds# make clean Delete most generated files 14111da177e4SLinus Torvalds# Leave enough to build external modules 14121da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 14131da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds# Directories & files removed with 'make clean' 14160663c68cSMasahiro YamadaCLEAN_FILES += include/ksym \ 14170663c68cSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 14200663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 142146a63d4bSMasahiro Yamada arch/$(SRCARCH)/include/generated .tmp_objdiff \ 14220663c68cSMasahiro Yamada debian snap tar-install \ 14230663c68cSMasahiro Yamada .config .config.old .version \ 142446457133SMasahiro Yamada Module.symvers \ 1425fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1426fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 142746a63d4bSMasahiro Yamada signing_key.x509.signer vmlinux-gdb.py \ 142846a63d4bSMasahiro Yamada *.spec 14291da177e4SLinus Torvalds 143046457133SMasahiro Yamada# Directories & files removed with 'make distclean' 143146457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 143246457133SMasahiro Yamada 14331da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 14341da177e4SLinus Torvalds# 14351da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 14361da177e4SLinus Torvalds 143776cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 14381da177e4SLinus Torvalds 1439bd1ee804SPawel Mollvmlinuxclean: 1440bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1441fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1442bd1ee804SPawel Moll 1443bd1ee804SPawel Mollclean: archclean vmlinuxclean 14441da177e4SLinus Torvalds 14451da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 14461da177e4SLinus Torvalds# 14471da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1448cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 14491da177e4SLinus Torvalds 1450b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 14511da177e4SLinus Torvalds$(mrproper-dirs): 14521da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 14531da177e4SLinus Torvalds 1454b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 14551da177e4SLinus Torvalds $(call cmd,rmfiles) 14561da177e4SLinus Torvalds 14571da177e4SLinus Torvalds# distclean 14581da177e4SLinus Torvalds# 145946457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 146046457133SMasahiro Yamada 14614f193362SPaul SmithPHONY += distclean 14621da177e4SLinus Torvalds 14631da177e4SLinus Torvaldsdistclean: mrproper 146446457133SMasahiro Yamada $(call cmd,rmfiles) 14651da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 14661da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1467f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1468f78271dfSMasahiro Yamada -o -name 'core' \) \ 14691da177e4SLinus Torvalds -type f -print | xargs rm -f 14701da177e4SLinus Torvalds 14711da177e4SLinus Torvalds 14721da177e4SLinus Torvalds# Packaging of the kernel to various formats 14731da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14741da177e4SLinus Torvalds 1475bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1476000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1477031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1478000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 14791da177e4SLinus Torvalds 14801da177e4SLinus Torvalds# Brief documentation of the typical targets used 14811da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14821da177e4SLinus Torvalds 14835dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1484a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 14855dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 14865dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 14871da177e4SLinus Torvalds 1488fe69b420SMasahiro YamadaPHONY += help 14891da177e4SLinus Torvaldshelp: 14901da177e4SLinus Torvalds @echo 'Cleaning targets:' 14915ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 14925cc8d246SJesper Juhl @echo ' enough build support to build external modules' 14935ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 14945cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 14951da177e4SLinus Torvalds @echo '' 14961da177e4SLinus Torvalds @echo 'Configuration targets:' 14971da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 14981da177e4SLinus Torvalds @echo '' 14991da177e4SLinus Torvalds @echo 'Other generic targets:' 15001da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 15011da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 15021da177e4SLinus Torvalds @echo '* modules - Build all modules' 15039cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 15041da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 150540ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1506433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1507433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 150862718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 150962718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1510155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1511c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 15121da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 15131da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1514f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 15153f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 15163f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 15173f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 15182fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 151959df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 15202fb9b1bdSSam Ravnborg echo '' 152131b8cc80SRandy Dunlap @echo 'Static analysers:' 15221da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 15231da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1524aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1525ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1526295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 152774425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 15287f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 152974425eeeSNicolas Palix @echo '' 1530eb8305aeSMatthias Maennich @echo 'Tools:' 1531eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1532eb8305aeSMatthias Maennich @echo '' 153331b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1534e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 15355a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 15365a5da78bSShuah Khan @echo ' running kselftest on it' 1537e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1538e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1539e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1540dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1541e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1542e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 15435a5da78bSShuah Khan @echo '' 154437c8a5faSRob Herring @$(if $(dtstree), \ 154537c8a5faSRob Herring echo 'Devicetree:'; \ 154637c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 154737c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 15487aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 15497aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 155037c8a5faSRob Herring echo '') 155137c8a5faSRob Herring 155231b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 155331b8cc80SRandy Dunlap @echo ' use "make tools/help"' 155431b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 155531b8cc80SRandy Dunlap @echo '' 15561da177e4SLinus Torvalds @echo 'Kernel packaging:' 1557000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 15581da177e4SLinus Torvalds @echo '' 15591da177e4SLinus Torvalds @echo 'Documentation targets:' 1560cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 15611da177e4SLinus Torvalds @echo '' 156201dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 15631da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 156401dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 15651da177e4SLinus Torvalds @echo '' 15661da177e4SLinus Torvalds @$(if $(boards), \ 15671da177e4SLinus Torvalds $(foreach b, $(boards), \ 15684234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 15691da177e4SLinus Torvalds echo '') 15705dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 15715dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 15725dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 15735dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 15745dffbe81SSegher Boessenkool echo '') 15751da177e4SLinus Torvalds 15761da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 157745d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 15781da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1579a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1580a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1581701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1582af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1583e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 158428bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 158528bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 158628bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1587a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 15881da177e4SLinus Torvalds @echo '' 15891da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 15901da177e4SLinus Torvalds @echo 'For further info see the ./README file' 15911da177e4SLinus Torvalds 15921da177e4SLinus Torvalds 15935dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 15945dffbe81SSegher Boessenkool 15955dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 15965dffbe81SSegher Boessenkool 1597fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 15985dffbe81SSegher Boessenkool 15995dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 16005dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 16015dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 16025dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 16035dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 16045dffbe81SSegher Boessenkool echo '') 16055dffbe81SSegher Boessenkool 16065dffbe81SSegher Boessenkool 16071da177e4SLinus Torvalds# Documentation targets 16081da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1609e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1610e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 161122cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1612bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1613cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 16141da177e4SLinus Torvalds 161567274c08SMasahiro Yamada# Misc 161667274c08SMasahiro Yamada# --------------------------------------------------------------------------- 161767274c08SMasahiro Yamada 161867274c08SMasahiro YamadaPHONY += scripts_gdb 16197a739ce5SMasahiro Yamadascripts_gdb: prepare0 16201e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 16218d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 162267274c08SMasahiro Yamada 162367274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 162467274c08SMasahiro Yamadaall: scripts_gdb 162567274c08SMasahiro Yamadaendif 162667274c08SMasahiro Yamada 16271da177e4SLinus Torvaldselse # KBUILD_EXTMOD 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds### 16301da177e4SLinus Torvalds# External module support. 16311da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 16321da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 16331da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 16341da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 16351da177e4SLinus Torvalds# be used. 16361da177e4SLinus Torvalds# 16371da177e4SLinus Torvalds# The following are the only valid targets when building external 16381da177e4SLinus Torvalds# modules. 16391da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 16401da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 16411da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 16421da177e4SLinus Torvalds# make M=dir modules_install 1643070b98bfSSam Ravnborg# Install the modules built in the module directory 16441da177e4SLinus Torvalds# Assumes install directory is already created 16451da177e4SLinus Torvalds 16461da177e4SLinus Torvalds# We are always building modules 16471da177e4SLinus TorvaldsKBUILD_MODULES := 1 16481da177e4SLinus Torvalds 16494f193362SPaul SmithPHONY += $(objtree)/Module.symvers 16501da177e4SLinus Torvalds$(objtree)/Module.symvers: 16511da177e4SLinus Torvalds @test -e $(objtree)/Module.symvers || ( \ 16521da177e4SLinus Torvalds echo; \ 16531da177e4SLinus Torvalds echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 16541da177e4SLinus Torvalds echo " is missing; modules will have no dependencies and modversions."; \ 16551da177e4SLinus Torvalds echo ) 16561da177e4SLinus Torvalds 1657c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 1658c99f3918SMasahiro YamadaPHONY += modules 1659c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers 1660b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 16611da177e4SLinus Torvalds 16624f193362SPaul SmithPHONY += modules_install 1663a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1664a67dc21aSSam Ravnborg 1665a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 16664f193362SPaul SmithPHONY += _emodinst_ 1667a67dc21aSSam Ravnborg_emodinst_: 1668a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1669b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 16701da177e4SLinus Torvalds 16714f193362SPaul SmithPHONY += _emodinst_post 1672a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1673a67dc21aSSam Ravnborg $(call cmd,depmod) 1674a67dc21aSSam Ravnborg 167576cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 1676bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps 16771da177e4SLinus Torvalds 1678fe69b420SMasahiro YamadaPHONY += help 16791da177e4SLinus Torvaldshelp: 16801da177e4SLinus Torvalds @echo ' Building external modules.' 16811da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 16821da177e4SLinus Torvalds @echo '' 16831da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 16841da177e4SLinus Torvalds @echo ' modules_install - install the module' 16851da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 16861da177e4SLinus Torvalds @echo '' 168706300b21SSam Ravnborg 1688059bc9fcSMasahiro YamadaPHONY += prepare 16891da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 16901da177e4SLinus Torvalds 1691b1fbfcb4SMasahiro Yamada# Single targets 1692b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1693b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1694b1fbfcb4SMasahiro Yamada# 1695b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1696b1fbfcb4SMasahiro Yamada# 1697b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1698b1fbfcb4SMasahiro Yamada# 1699b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1700b1fbfcb4SMasahiro Yamada# 1701b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1702b1fbfcb4SMasahiro Yamada 1703b1fbfcb4SMasahiro Yamadaifdef single-build 1704b1fbfcb4SMasahiro Yamada 1705b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1706b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1707b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1708b1fbfcb4SMasahiro Yamada 1709b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost 1710b1fbfcb4SMasahiro Yamada @: 1711b1fbfcb4SMasahiro Yamada$(single-no-ko): descend 1712b1fbfcb4SMasahiro Yamada @: 1713b1fbfcb4SMasahiro Yamada 1714b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1715b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 1716b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1717b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp 1718b1fbfcb4SMasahiro Yamadaendif 1719b1fbfcb4SMasahiro Yamada 1720b1fbfcb4SMasahiro YamadaPHONY += single_modpost 1721b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko) 1722b1fbfcb4SMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 1723b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1724b1fbfcb4SMasahiro Yamada 1725b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1 1726b1fbfcb4SMasahiro Yamada 1727b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1728b1fbfcb4SMasahiro Yamada 1729b1fbfcb4SMasahiro Yamada# trim unrelated directories 1730b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \ 1731b1fbfcb4SMasahiro Yamada $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1732b1fbfcb4SMasahiro Yamada 1733b1fbfcb4SMasahiro Yamadaendif 1734b1fbfcb4SMasahiro Yamada 1735b480fec9SMasahiro Yamadaifndef CONFIG_MODULES 1736b480fec9SMasahiro YamadaKBUILD_MODULES := 1737b480fec9SMasahiro Yamadaendif 1738b480fec9SMasahiro Yamada 1739c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1740c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1741c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1742c99f3918SMasahiro Yamada# make menuconfig etc. 1743c99f3918SMasahiro Yamada# Error messages still appears in the original language 1744c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 1745c99f3918SMasahiro Yamadadescend: $(build-dirs) 1746c99f3918SMasahiro Yamada$(build-dirs): prepare 1747b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ \ 1748f566e1fbSMasahiro Yamada single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \ 1749b1fbfcb4SMasahiro Yamada need-builtin=1 need-modorder=1 1750c99f3918SMasahiro Yamada 175176cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 175276cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 175376cd306dSMasahiro Yamada$(clean-dirs): 175476cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 175576cd306dSMasahiro Yamada 175688d7be03SMichal Marekclean: $(clean-dirs) 175788d7be03SMichal Marek $(call cmd,rmfiles) 175843f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1759ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 17604f0e3a57SRob Herring -o -name '*.ko.*' \ 17614f0e3a57SRob Herring -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1762ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 1763bbc55bdeSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 176488d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 17659a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 17664fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 176788d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 17688b41fc44SMasahiro Yamada -o -name '.tmp_*.o.*' \ 17696b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1770433db3e2SVinÃcius Tinti -o -name '*.ll' \ 177188d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 177288d7be03SMichal Marek 17731da177e4SLinus Torvalds# Generate tags for editors 17741da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1775a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1776858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 17771da177e4SLinus Torvalds 1778f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 17791da177e4SLinus Torvalds $(call cmd,tags) 17801da177e4SLinus Torvalds 1781eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1782eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1783eb8305aeSMatthias Maennich 1784eb8305aeSMatthias MaennichPHONY += nsdeps 1785bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1786eb8305aeSMatthias Maennichnsdeps: modules 1787bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1788eb8305aeSMatthias Maennich 17891da177e4SLinus Torvalds# Scripts to check various things for consistency 17901da177e4SLinus Torvalds# --------------------------------------------------------------------------- 17911da177e4SLinus Torvalds 1792279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1793279f3dd3SPeter Foley 17941da177e4SLinus Torvaldsincludecheck: 1795436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 17961da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 179780007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 17981da177e4SLinus Torvalds 17991da177e4SLinus Torvaldsversioncheck: 18002ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 18011da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 180280007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 18031da177e4SLinus Torvalds 180474425eeeSNicolas Palixcoccicheck: 1805858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 180674425eeeSNicolas Palix 18071da177e4SLinus Torvaldsnamespacecheck: 18081da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 18091da177e4SLinus Torvalds 1810295ac051SAdrian Bunkexport_report: 1811295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1812295ac051SAdrian Bunk 1813c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1814e3ccf6e3SJeff Dike 1815011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1816011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1817011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1818011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1819011e3a9aSJeff Dikeifeq ($(ARCH), um) 1820011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1821011e3a9aSJeff Dikeelse 1822011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1823011e3a9aSJeff Dikeendif 18241da177e4SLinus Torvaldscheckstack: 18251da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 182675dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 18271da177e4SLinus Torvalds 18287b8ea53dSAmerigo Wangkernelrelease: 18297b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 183001ab1788SAmerigo Wang 1831cb58455cSSam Ravnborgkernelversion: 18322244cbd8SSam Ravnborg @echo $(KERNELVERSION) 18331da177e4SLinus Torvalds 1834c398ff00SMike Marciniszynimage_name: 1835c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1836c398ff00SMike Marciniszyn 1837ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1838f47a23ceSMasahiro Yamada 1839f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_) 1840f47a23ceSMasahiro Yamadatools_silent=s 1841f47a23ceSMasahiro Yamadaendif 1842f47a23ceSMasahiro Yamada 1843ea01fa9fSBorislav Petkovtools/: FORCE 1844bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 184575dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1846ea01fa9fSBorislav Petkov 1847ea01fa9fSBorislav Petkovtools/%: FORCE 1848bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 184975dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1850ea01fa9fSBorislav Petkov 18511da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 18520663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 18531da177e4SLinus Torvalds 1854bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 185550a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1856569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 18575a144a1aSMasahiro Yamada $(KERNELRELEASE) 185850a8ec31SSam Ravnborg 1859392885eeSMasahiro Yamada# read saved command lines for existing targets 1860392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 18611da177e4SLinus Torvalds 1862b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 18631da177e4SLinus Torvalds 186446b7c492SSZ Lin (林上智)endif # config-build 18652042b548SMasahiro Yamadaendif # mixed-build 1866688931a5SMasahiro Yamadaendif # need-sub-make 18671da177e4SLinus Torvalds 18684f193362SPaul SmithPHONY += FORCE 18691da177e4SLinus TorvaldsFORCE: 18704f193362SPaul Smith 1871bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1872fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 18734f193362SPaul Smith.PHONY: $(PHONY) 1874