1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2bfeffd15SLinus TorvaldsVERSION = 5 354ecb8f7SLinus TorvaldsPATCHLEVEL = 4 455922c9dSLinus TorvaldsSUBLEVEL = 0 531f4f5b4SLinus TorvaldsEXTRAVERSION = -rc7 6d6d5df1dSLinus TorvaldsNAME = Kleptomaniac Octopus 71da177e4SLinus Torvalds 81da177e4SLinus Torvalds# *DOCUMENTATION* 91da177e4SLinus Torvalds# To see a list of typical targets execute "make help" 101da177e4SLinus Torvalds# More info can be located in ./README 111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not 121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file. 131da177e4SLinus Torvalds 14ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 15ba634eceSMasahiro YamadaPHONY := _all 16ba634eceSMasahiro Yamada_all: 17ba634eceSMasahiro Yamada 181da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 191da177e4SLinus Torvalds# to get the ordering right. 201da177e4SLinus Torvalds# 211da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 221da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 231da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 24f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 251da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 261da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 271da177e4SLinus Torvalds# is now up to date. 281da177e4SLinus Torvalds# 291da177e4SLinus Torvalds# The only cases where we need to modify files which have global 301da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 311da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 321da177e4SLinus Torvalds# prepare rule. 331da177e4SLinus Torvalds 34221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 353812b8c5SMasahiro Yamada 363812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 373812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 383812b8c5SMasahiro YamadaMAKEFLAGS += -rR 393812b8c5SMasahiro Yamada 403812b8c5SMasahiro Yamada# Avoid funny character set dependencies 413812b8c5SMasahiro Yamadaunexport LC_ALL 423812b8c5SMasahiro YamadaLC_COLLATE=C 433812b8c5SMasahiro YamadaLC_NUMERIC=C 443812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 453812b8c5SMasahiro Yamada 463812b8c5SMasahiro Yamada# Avoid interference with shell env settings 473812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 483812b8c5SMasahiro Yamada 49066b7ed9SMichal Marek# Beautify output 50066b7ed9SMichal Marek# --------------------------------------------------------------------------- 51066b7ed9SMichal Marek# 52066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 53066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 54066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 55066b7ed9SMichal Marek# 56066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 57066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 58066b7ed9SMichal Marek# 59066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 60066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 61066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 62066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 63066b7ed9SMichal Marek# 64066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 65066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 66066b7ed9SMichal Marek# 67066b7ed9SMichal Marek# $(Q)ln $@ :< 68066b7ed9SMichal Marek# 69066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 70066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 71066b7ed9SMichal Marek# 721da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 731da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 741da177e4SLinus Torvalds 751da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 761da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 771da177e4SLinus Torvaldsendif 781da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 791da177e4SLinus Torvalds KBUILD_VERBOSE = 0 801da177e4SLinus Torvaldsendif 811da177e4SLinus Torvalds 82066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 83066b7ed9SMichal Marek quiet = 84066b7ed9SMichal Marek Q = 85066b7ed9SMichal Marekelse 86066b7ed9SMichal Marek quiet=quiet_ 87066b7ed9SMichal Marek Q = @ 88066b7ed9SMichal Marekendif 89066b7ed9SMichal Marek 90066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 91066b7ed9SMichal Marek# commands 92066b7ed9SMichal Marek 936f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 94066b7ed9SMichal Marek quiet=silent_ 95066b7ed9SMichal Marekendif 96066b7ed9SMichal Marek 97066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 98066b7ed9SMichal Marek 9925b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 10025b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 10125b146c5SMasahiro Yamada# 10225b146c5SMasahiro Yamada# For example, you can do this: 10325b146c5SMasahiro Yamada# 10425b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 10525b146c5SMasahiro Yamada# 10625b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 10725b146c5SMasahiro Yamada# two syntaxes to specify it. 10825b146c5SMasahiro Yamada# 1091da177e4SLinus Torvalds# 1) O= 1101da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1111da177e4SLinus Torvalds# 1121da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 11325b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 11425b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 1151da177e4SLinus Torvalds# 1161da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1171da177e4SLinus Torvalds# variable. 1181da177e4SLinus Torvalds 11925b146c5SMasahiro Yamada# Do we want to change the working directory? 1201da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1211da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1221da177e4SLinus Torvaldsendif 1231da177e4SLinus Torvalds 12425b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 12525b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 12625b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 12725b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 12825b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 12925b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 13025b146c5SMasahiro Yamada 13125b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 13225b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 13325b146c5SMasahiro Yamadaelse 13425b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 13525b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 13625b146c5SMasahiro Yamada 13725b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 13825b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 13925b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 14025b146c5SMasahiro Yamadaelse 14125b146c5SMasahiro Yamadaneed-sub-make := 1 14251193b76SRobert Jarzmikendif 14351193b76SRobert Jarzmik 14425b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 1451da177e4SLinus Torvalds 14625b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 14725b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 14825b146c5SMasahiro Yamadaendif 14925b146c5SMasahiro Yamada 15025b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 15180463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 15280463f1bSMasahiro Yamada# 15380463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed 15425b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make. 15525b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 156688931a5SMasahiro Yamadaneed-sub-make := 1 15725b146c5SMasahiro Yamadaendif 1583812b8c5SMasahiro Yamada 159688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 160688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 161688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 162688931a5SMasahiro Yamadaneed-sub-make := 1 163688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 164688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ; 165688931a5SMasahiro Yamadaendif 166688931a5SMasahiro Yamada 16725b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 168221cc2d2SMasahiro Yamadaexport sub_make_done := 1 169221cc2d2SMasahiro Yamada 170688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 171688931a5SMasahiro Yamada 1720b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make 1730b35786dSMilton Miller 1740209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make 17516f89098SCharles Keepax @: 1760b35786dSMilton Miller 177c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 1782e8d696bSMasahiro Yamadasub-make: 17925b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 1801da177e4SLinus Torvalds 181688931a5SMasahiro Yamadaendif # need-sub-make 182221cc2d2SMasahiro Yamadaendif # sub_make_done 183688931a5SMasahiro Yamada 1841da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 185688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 1861da177e4SLinus Torvalds 1877ff52571SMasahiro Yamada# Do not print "Entering directory ...", 1887ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 1897ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 1907ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 1917ff52571SMasahiro Yamada 192aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 193aa55c8e2SMasahiro Yamada# C compilation. 194aa55c8e2SMasahiro Yamada# 195aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 196aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 197aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not. 198aa55c8e2SMasahiro Yamada# 199036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details, 200036db11cSCao jin# including where to get the "sparse" utility. 201aa55c8e2SMasahiro Yamada 202aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line") 203aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = $(C) 204aa55c8e2SMasahiro Yamadaendif 205aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC 206aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = 0 207aa55c8e2SMasahiro Yamadaendif 208aa55c8e2SMasahiro Yamada 2097e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 2107e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 211aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line") 212aa55c8e2SMasahiro Yamada KBUILD_EXTMOD := $(M) 213aa55c8e2SMasahiro Yamadaendif 214aa55c8e2SMasahiro Yamada 215051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD 216051f278eSMasahiro Yamada 217394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 218394053f4SMasahiro Yamada 21925b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 2209da0763bSMichal Marek # building in the source tree 2219da0763bSMichal Marek srctree := . 222051f278eSMasahiro Yamada building_out_of_srctree := 2239da0763bSMichal Marekelse 22425b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 2259da0763bSMichal Marek # building in a subdirectory of the source tree 2269da0763bSMichal Marek srctree := .. 2279da0763bSMichal Marek else 22825b146c5SMasahiro Yamada srctree := $(abs_srctree) 2299da0763bSMichal Marek endif 230051f278eSMasahiro Yamada building_out_of_srctree := 1 2319da0763bSMichal Marekendif 2322c1f4f12SMasahiro Yamada 23395fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 23495fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 23595fd3f87SMasahiro Yamadaendif 2362c1f4f12SMasahiro Yamada 2377e1c0477SMichal Marekobjtree := . 2386b12de69SMasahiro YamadaVPATH := $(srctree) 2391da177e4SLinus Torvalds 240051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 2411da177e4SLinus Torvalds 2422c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 2432c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 2442c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 2452c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 2462c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 2472c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 2482c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 2492c1f4f12SMasahiro Yamada 2502c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 2512c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h 2522c1f4f12SMasahiro Yamada 25322340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 25422340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 2552c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 25659b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 25763e31a67SMasahiro Yamada %asm-generic kernelversion %src-pkg 258a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \ 259a29d4d8cSMasahiro Yamada kernelrelease 260394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 2612c1f4f12SMasahiro Yamada 2622042b548SMasahiro Yamadaconfig-build := 2632042b548SMasahiro Yamadamixed-build := 2642042b548SMasahiro Yamadaneed-config := 1 265d7942413SMasahiro Yamadamay-sync-config := 1 266394053f4SMasahiro Yamadasingle-build := 2672c1f4f12SMasahiro Yamada 2682c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 2692c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 2702042b548SMasahiro Yamada need-config := 2712c1f4f12SMasahiro Yamada endif 2722c1f4f12SMasahiro Yamadaendif 2732c1f4f12SMasahiro Yamada 274d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 275d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 2762042b548SMasahiro Yamada may-sync-config := 277d7942413SMasahiro Yamada endif 278d7942413SMasahiro Yamadaendif 279d7942413SMasahiro Yamada 280d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 2812042b548SMasahiro Yamada may-sync-config := 282d7942413SMasahiro Yamadaendif 283d7942413SMasahiro Yamada 2842c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 2852c1f4f12SMasahiro Yamada ifneq ($(filter config %config,$(MAKECMDGOALS)),) 2862042b548SMasahiro Yamada config-build := 1 2872c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 2882042b548SMasahiro Yamada mixed-build := 1 2892c1f4f12SMasahiro Yamada endif 2902c1f4f12SMasahiro Yamada endif 2912c1f4f12SMasahiro Yamadaendif 29222340a06SMasahiro Yamada 293394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 294394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 295394053f4SMasahiro Yamada single-build := 1 296394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 297394053f4SMasahiro Yamada mixed-build := 1 298394053f4SMasahiro Yamada endif 299394053f4SMasahiro Yamadaendif 300394053f4SMasahiro Yamada 30122340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 30222340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 30322340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 3042042b548SMasahiro Yamada mixed-build := 1 30522340a06SMasahiro Yamada endif 30622340a06SMasahiro Yamadaendif 30722340a06SMasahiro Yamada 3082c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 3092c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 3102c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 3112042b548SMasahiro Yamada mixed-build := 1 3122c1f4f12SMasahiro Yamada endif 3132c1f4f12SMasahiro Yamadaendif 3142c1f4f12SMasahiro Yamada 3152042b548SMasahiro Yamadaifdef mixed-build 3162c1f4f12SMasahiro Yamada# =========================================================================== 3172c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 3182c1f4f12SMasahiro Yamada# Handle them one by one. 3192c1f4f12SMasahiro Yamada 3202c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 3212c1f4f12SMasahiro Yamada 3222c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 3232c1f4f12SMasahiro Yamada @: 3242c1f4f12SMasahiro Yamada 3252c1f4f12SMasahiro Yamada__build_one_by_one: 3262c1f4f12SMasahiro Yamada $(Q)set -e; \ 3272c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 3282c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 3292c1f4f12SMasahiro Yamada done 3302c1f4f12SMasahiro Yamada 3312042b548SMasahiro Yamadaelse # !mixed-build 3322c1f4f12SMasahiro Yamada 3332c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include 3342c1f4f12SMasahiro Yamada 3352c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 3362c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 3372c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 3382c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 3392c1f4f12SMasahiro Yamada 340b2d35fa5SAnders Roxellinclude scripts/subarch.include 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 3431da177e4SLinus Torvalds# --------------------------------------------------------------------------- 3441da177e4SLinus Torvalds# 3451da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 3461da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 3471da177e4SLinus Torvalds# ARCH can be set during invocation of make: 3481da177e4SLinus Torvalds# make ARCH=ia64 3491da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 3501da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 3531da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 3541da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 3551da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 3561da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 3571da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 3581da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 3591da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 3602331d1a6SSam RavnborgARCH ?= $(SUBARCH) 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds# Architecture as present in compile.h 3631da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 3646752ed90SThomas GleixnerSRCARCH := $(ARCH) 3651da177e4SLinus Torvalds 366d746d647SSam Ravnborg# Additional ARCH settings for x86 367d746d647SSam Ravnborgifeq ($(ARCH),i386) 368d746d647SSam Ravnborg SRCARCH := x86 369d746d647SSam Ravnborgendif 370d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 371d746d647SSam Ravnborg SRCARCH := x86 372d746d647SSam Ravnborgendif 37374b469f2SSam Ravnborg 3745e538790SSam Ravnborg# Additional ARCH settings for sparc 375e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 376e69f58c0SNamhyung Kim SRCARCH := sparc 377e69f58c0SNamhyung Kimendif 378a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 3795e538790SSam Ravnborg SRCARCH := sparc 380a439fe51SSam Ravnborgendif 3812fb9b1bdSSam Ravnborg 3823cc000b5SPaul Mundt# Additional ARCH settings for sh 3833cc000b5SPaul Mundtifeq ($(ARCH),sh64) 3843cc000b5SPaul Mundt SRCARCH := sh 3853cc000b5SPaul Mundtendif 3863cc000b5SPaul Mundt 38714cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 38841263fc6SBen Gardinerexport KCONFIG_CONFIG 38914cdd3c4SRoman Zippel 3901da177e4SLinus Torvalds# SHELL used by kbuild 391858805b3SMasahiro YamadaCONFIG_SHELL := sh 3921da177e4SLinus Torvalds 3936d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 3946d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 3956d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 396d7f14c66SUwe Kleine-König 3971da177e4SLinus TorvaldsHOSTCC = gcc 3981da177e4SLinus TorvaldsHOSTCXX = g++ 39996f14fe7SLaura AbbottKBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 400f92d19e0SLaura Abbott -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 401f92d19e0SLaura Abbott $(HOSTCFLAGS) 402f92d19e0SLaura AbbottKBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 403f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 404f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds# Make variables (CC, etc...) 4071da177e4SLinus TorvaldsAS = $(CROSS_COMPILE)as 4081da177e4SLinus TorvaldsLD = $(CROSS_COMPILE)ld 4091da177e4SLinus TorvaldsCC = $(CROSS_COMPILE)gcc 4101da177e4SLinus TorvaldsCPP = $(CC) -E 4111da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 4121da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 4131da177e4SLinus TorvaldsSTRIP = $(CROSS_COMPILE)strip 4141da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 4151da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 4167bac9870SVasily GorbikOBJSIZE = $(CROSS_COMPILE)size 417e83b9f55SAndrii NakryikoPAHOLE = pahole 41873a4f6dbSMasahiro YamadaLEX = flex 41973a4f6dbSMasahiro YamadaYACC = bison 4201da177e4SLinus TorvaldsAWK = awk 421caa27b66SSam RavnborgINSTALLKERNEL := installkernel 4221da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 4231da177e4SLinus TorvaldsPERL = perl 424011bf125SMasahiro YamadaPYTHON = python 425e9781b52SMasahiro YamadaPYTHON2 = python2 426e9781b52SMasahiro YamadaPYTHON3 = python3 4271da177e4SLinus TorvaldsCHECK = sparse 428858805b3SMasahiro YamadaBASH = bash 4291da177e4SLinus Torvalds 43080a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 4316c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 4320c22be07SDouglas AndersonNOSTDINC_FLAGS := 4336588169dSSam RavnborgCFLAGS_MODULE = 4346588169dSSam RavnborgAFLAGS_MODULE = 4356588169dSSam RavnborgLDFLAGS_MODULE = 4361da177e4SLinus TorvaldsCFLAGS_KERNEL = 4371da177e4SLinus TorvaldsAFLAGS_KERNEL = 438b36fad65SMichal MarekLDFLAGS_vmlinux = 4391da177e4SLinus Torvalds 440abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 441abbf1590SDavid HowellsUSERINCLUDE := \ 4429d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 4439d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 444abbf1590SDavid Howells -I$(srctree)/include/uapi \ 4453308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 446abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 447abbf1590SDavid Howells 4481da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 4491da177e4SLinus Torvalds# Needed to be compatible with the O= option 450abbf1590SDavid HowellsLINUXINCLUDE := \ 4519d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 4529d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 453051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 454f8224f7fSMasahiro Yamada -I$(objtree)/include \ 455f8224f7fSMasahiro Yamada $(USERINCLUDE) 4561da177e4SLinus Torvalds 45742a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 458eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 45942a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 460b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 46151b97e35SKirill A. Shutemov -Wno-format-security \ 462433dc2ebSMasahiro Yamada -std=gnu89 463433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 46480c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 46580c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 4666588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 4676588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 46810df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 46910df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds 470d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 471433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS := 4725241ab4cSMasahiro YamadaCLANG_FLAGS := 4731da177e4SLinus Torvalds 474858805b3SMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 4757bac9870SVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL 4767bac9870SVasily Gorbikexport PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 4777bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 4781da177e4SLinus Torvalds 479d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 4800e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 4810e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 482222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 4836588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 48480c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds# Files to ignore in find ... statements 4871da177e4SLinus Torvalds 488ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 489ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 490ae63b2d7SPrarit Bhargava -prune -o 491450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 492450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds# =========================================================================== 4951da177e4SLinus Torvalds# Rules shared between *config targets and build targets 4961da177e4SLinus Torvalds 497312a3d09SCao jin# Basic helpers built in scripts/basic/ 4984f193362SPaul SmithPHONY += scripts_basic 4991da177e4SLinus Torvaldsscripts_basic: 5001da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 501638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 5021da177e4SLinus Torvalds 5034f193362SPaul SmithPHONY += outputmakefile 504e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 505fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 506fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 507fd5f0cd6SJan Beulich# output directory. 5083a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 5093a51ff34SVladimir Kondratiev# ignore whole output directory 5101da177e4SLinus Torvaldsoutputmakefile: 511051f278eSMasahiro Yamadaifdef building_out_of_srctree 512e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 513e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 514e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 515e8e83a23SMasahiro Yamada echo >&2 "***"; \ 516e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 517e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 518e8e83a23SMasahiro Yamada echo >&2 "***"; \ 519e8e83a23SMasahiro Yamada false; \ 520e8e83a23SMasahiro Yamada fi 52192979997SAndi Kleen $(Q)ln -fsn $(srctree) source 5224fd61277SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 523156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 524156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 525fd5f0cd6SJan Beulichendif 5261da177e4SLinus Torvalds 52799516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 528ae6b289aSChris Friesifneq ($(CROSS_COMPILE),) 5295241ab4cSMasahiro YamadaCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 530ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 531238bcbc4SMasahiro YamadaCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 532ef8c4ed9SStefan AgnerGCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 533ae6b289aSChris Friesendif 534ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),) 535238bcbc4SMasahiro YamadaCLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 536ae6b289aSChris Friesendif 537876a0600SNathan Chancellorifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) 538238bcbc4SMasahiro YamadaCLANG_FLAGS += -no-integrated-as 539876a0600SNathan Chancellorendif 540589834b3SNathan ChancellorCLANG_FLAGS += -Werror=unknown-warning-option 541238bcbc4SMasahiro YamadaKBUILD_CFLAGS += $(CLANG_FLAGS) 542238bcbc4SMasahiro YamadaKBUILD_AFLAGS += $(CLANG_FLAGS) 5433bd98050SJoel Stanleyexport CLANG_FLAGS 544ae6b289aSChris Friesendif 545ae6b289aSChris Fries 546315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 547315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 548315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 549315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade. 550902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 551315bab4eSMasahiro Yamada 5522042b548SMasahiro Yamadaifdef config-build 5531da177e4SLinus Torvalds# =========================================================================== 5541da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 5551da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 5581da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 5591da177e4SLinus Torvalds# used for 'make defconfig' 560a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 561315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 5621da177e4SLinus Torvalds 56336de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 56431110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 56531110ebbSSam Ravnborg 56636de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 5671da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 5681da177e4SLinus Torvalds 5692042b548SMasahiro Yamadaelse #!config-build 5701da177e4SLinus Torvalds# =========================================================================== 5711da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 5721da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 5731da177e4SLinus Torvalds 5742c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 5752c1f4f12SMasahiro Yamada# but instead _all depend on modules 5762c1f4f12SMasahiro YamadaPHONY += all 5772c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 5782c1f4f12SMasahiro Yamada_all: all 5792c1f4f12SMasahiro Yamadaelse 5802c1f4f12SMasahiro Yamada_all: modules 5812c1f4f12SMasahiro Yamadaendif 5822c1f4f12SMasahiro Yamada 5832c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 5842c1f4f12SMasahiro Yamada# Normally, just do built-in. 5852c1f4f12SMasahiro Yamada 5862c1f4f12SMasahiro YamadaKBUILD_MODULES := 5872c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 5882c1f4f12SMasahiro Yamada 5892c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 5902c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider 5912c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to 5922c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them. 5932c1f4f12SMasahiro Yamada 5942c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 5952c1f4f12SMasahiro Yamada KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 5962c1f4f12SMasahiro Yamadaendif 5972c1f4f12SMasahiro Yamada 5982c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 5992c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 6002c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 6012c1f4f12SMasahiro Yamada 602d85103acSMasahiro Yamadaifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),) 6032c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6042c1f4f12SMasahiro Yamadaendif 6052c1f4f12SMasahiro Yamada 6062c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 6072c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 6082c1f4f12SMasahiro Yamadaendif 6092c1f4f12SMasahiro Yamada 6102c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 6112c1f4f12SMasahiro Yamada 6122042b548SMasahiro Yamadaifdef need-config 613d93a18f2SMasahiro Yamadainclude include/config/auto.conf 614d93a18f2SMasahiro Yamadaendif 615d93a18f2SMasahiro Yamada 6161da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 6171da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 6181da177e4SLinus Torvaldsinit-y := init/ 619f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 620d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 6211da177e4SLinus Torvaldsnet-y := net/ 6221da177e4SLinus Torvaldslibs-y := lib/ 6231da177e4SLinus Torvaldscore-y := usr/ 62437d9fe47SFeng Wuvirt-y := virt/ 6251da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 6261da177e4SLinus Torvalds 627315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 628315bab4eSMasahiro Yamada# command line. 629315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 630315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 631315bab4eSMasahiro Yamadaall: vmlinux 632315bab4eSMasahiro Yamada 633315bab4eSMasahiro YamadaCFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 634315bab4eSMasahiro Yamada $(call cc-option,-fno-tree-loop-im) \ 635315bab4eSMasahiro Yamada $(call cc-disable-warning,maybe-uninitialized,) 6365aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 637315bab4eSMasahiro Yamada 638b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 639b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 640b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 641b1f4ff74SPaulo Zanoniendif 642b1f4ff74SPaulo Zanoni 643669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 644669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 645669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 646669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 647669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 648669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 649669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS 650669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS 651669e06b1SMasahiro Yamada 652315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 653315bab4eSMasahiro Yamada 6542042b548SMasahiro Yamadaifdef need-config 6552042b548SMasahiro Yamadaifdef may-sync-config 656315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 657315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 658315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 659d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 6601da177e4SLinus Torvalds 66105850719SMasahiro Yamada$(KCONFIG_CONFIG): 66205850719SMasahiro Yamada @echo >&2 '***' 66305850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 66405850719SMasahiro Yamada @echo >&2 '***' 66505850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 66605850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 66705850719SMasahiro Yamada @echo >&2 '***' 66805850719SMasahiro Yamada @/bin/false 6691da177e4SLinus Torvalds 67061277981SUlf Magnusson# The actual configuration files used during the build are stored in 67161277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 67261277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 6739390dff6SMasahiro Yamada# 6749390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 6759390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 6769390dff6SMasahiro Yamada%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) 677911a91c3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 6782042b548SMasahiro Yamadaelse # !may-sync-config 679d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 680d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 681d7942413SMasahiro Yamada# Use auto.conf to trigger the test 6829ee4e336SSam RavnborgPHONY += include/config/auto.conf 6839ee4e336SSam Ravnborg 6849ee4e336SSam Ravnborginclude/config/auto.conf: 685264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 6865369f550SMichal Marek echo >&2; \ 6875369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 6885369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 6895369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 6905369f550SMichal Marek echo >&2 ; \ 6919ee4e336SSam Ravnborg /bin/false) 6929ee4e336SSam Ravnborg 693d7942413SMasahiro Yamadaendif # may-sync-config 6942042b548SMasahiro Yamadaendif # need-config 6951da177e4SLinus Torvalds 696a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 697ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 698bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 699bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 7006f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 701a1c48bb1SGeert Uytterhoeven 70215f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 703a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 70415f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 70515f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3 70615f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 70715f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 7081da177e4SLinus Torvaldsendif 7091da177e4SLinus Torvalds 710b303c6dfSMasahiro Yamadaifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 711b303c6dfSMasahiro YamadaKBUILD_CFLAGS += -Wno-maybe-uninitialized 712b303c6dfSMasahiro Yamadaendif 713a76bcf55SArnd Bergmann 71469102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 71569102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 71669102311SJiri Kosina 717d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov 7186b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins 7196b90bd4bSEmese Revfy 7201873e870SAndi Kleenifdef CONFIG_READABLE_ASM 7211873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 7221873e870SAndi Kleen# reorder blocks reorders the control in the function 7231873e870SAndi Kleen# ipa clone creates specialized cloned functions 7241873e870SAndi Kleen# partial inlining inlines only parts of functions 7251873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 7261873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 7271873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 7281873e870SAndi Kleenendif 7291873e870SAndi Kleen 73008f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 73135bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 73235bb5b1eSAndi Kleenendif 73335bb5b1eSAndi Kleen 7342a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 735050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 736050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 7372a61f474SMasahiro Yamada 7382a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 739e06b8b98SSam Ravnborg 740076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 741a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 742a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier 743a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 744cfe17c9bSMasahiro Yamada# Quiet clang warning: comparison of unsigned expression < 0 is always false 745a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-tautological-compare 746cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 747cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names. 748cfe17c9bSMasahiro Yamada# See modpost pattern 2 749a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge 750cfe17c9bSMasahiro Yamadaelse 751cfe17c9bSMasahiro Yamada 752cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build. 753cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 7549df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable 755e2079e93SNathan Chancellor 756e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement. 757e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and 758e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 759e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 760cfe17c9bSMasahiro Yamadaendif 761cfe17c9bSMasahiro Yamada 7620a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 7631da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 764a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 7651da177e4SLinus Torvaldselse 7667e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 7677e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 7687e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 7697e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 7707e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 7717e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 772a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 7731da177e4SLinus Torvaldsendif 7747e9501fdSRabin Vincentendif 7751da177e4SLinus Torvalds 776709a972eSKees Cook# Initialize all stack variables with a pattern, if desired. 777709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL 778709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 779709a972eSKees Cookendif 780709a972eSKees Cook 7811e88e415SMasahiro YamadaDEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 7822062afb4SLinus Torvalds 7831da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 784866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 7859d937444SMasahiro YamadaDEBUG_CFLAGS += -gsplit-dwarf 786866ced95SAndi Kleenelse 7871e88e415SMasahiro YamadaDEBUG_CFLAGS += -g 788866ced95SAndi Kleenendif 7892288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 7901da177e4SLinus Torvaldsendif 791bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 7929d937444SMasahiro YamadaDEBUG_CFLAGS += -gdwarf-4 793bfaf2dd3SAndi Kleenendif 7941da177e4SLinus Torvalds 795d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 7961e88e415SMasahiro YamadaDEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 797e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 798d6f4ceb7SAndi Kleenendif 799d6f4ceb7SAndi Kleen 8001e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS) 8011e88e415SMasahiro Yamadaexport DEBUG_CFLAGS 8021e88e415SMasahiro Yamada 803606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 80407d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD 80507d04081SVasily Gorbik # gcc 5 supports generating the mcount tables directly 80607d04081SVasily Gorbik ifeq ($(call cc-option-yn,-mrecord-mcount),y) 80707d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 80807d04081SVasily Gorbik export CC_USING_RECORD_MCOUNT := 1 809a2546faeSSteven Rostedt endif 8102f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 8112f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 8122f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 8132f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 8142f4df001SVasily Gorbik endif 8152f4df001SVasily Gorbik endif 81607d04081SVasily Gorbikendif 817a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 818f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 819f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 820f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 821a2546faeSSteven Rostedt endif 822f28bc3c3SVasily Gorbikendif 823f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 824f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 825f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 82672441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 827cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 82872441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 82972441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 83072441cb1SSteven Rostedt endif 83172441cb1SSteven Rostedtendif 83216444a8aSArnaldo Carvalho de Meloendif 83316444a8aSArnaldo Carvalho de Melo 83491341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 83591341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 83691341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 83791341d4bSSam Ravnborgendif 83891341d4bSSam Ravnborg 83990ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 840e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 841e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 84290ad4052SMasahiro Yamadaendif 84390ad4052SMasahiro Yamada 84443bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH 84543bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 84643bd3a95SMiroslav Benesendif 84743bd3a95SMiroslav Benes 848e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 849e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 850e8e69931SSam Ravnborg 8511da177e4SLinus Torvalds# warn about C99 declaration after statement 852a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 8531da177e4SLinus Torvalds 8540bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 8558289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 8560bb95f80SKees Cook 857070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 858fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 8591da177e4SLinus Torvalds 860217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 861217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 862217c3e01SStephen Rothwell 863fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 864a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 865d0115552SLinus Torvalds 86687e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this 86787e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we 86887e0d4f0SDaniel Borkmann# need to disable it here generally. 86987e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 87087e0d4f0SDaniel Borkmann 87187e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine 87287e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled. 87387e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 87487e0d4f0SDaniel Borkmann 8753ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 8763ce120b1SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 8773ce120b1SLinus Torvalds 8788f7f5c9fSAndi Kleen# conserve stack if available 8798f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 8808f7f5c9fSAndi Kleen 881fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 882fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 883fe7c36c7SJosh Triplett 884ea8daa7bSDaniel Wagner# enforce correct pointer usage 885ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 886ea8daa7bSDaniel Wagner 887c834f0e8SKees Cook# Require designated initializers for all marked structures 888c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 889c834f0e8SKees Cook 890a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 891a73619a8SMasahiro YamadaKBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 892a73619a8SMasahiro Yamada 89329be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is 89429be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern 89529be86d7SSeth Forsheeifdef CONFIG_RETPOLINE 89629be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 89729be86d7SSeth Forsheeendif 89829be86d7SSeth Forshee 899a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan 900a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn 901c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan 902a86fe353SMasahiro Yamada 9038cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 9048cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 9058cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 9068cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 90752bcc330SSam Ravnborg 90889ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id 90989ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id 91018991197SRoland McGrath 9115d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 912d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 9135d7d18f5SDavid Howellsendif 9145d7d18f5SDavid Howells 9155cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 9165cf896fbSPeter CollingbourneLDFLAGS_vmlinux += --pack-dyn-relocs=relr 9175cf896fbSPeter Collingbourneendif 9185cf896fbSPeter Collingbourne 91914516765SLuc Van Oostenryck# insure the checker run with the right endianness 92014516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 92114516765SLuc Van Oostenryck 9221f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 9231f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 9241f2f01b1SLuc Van Oostenryck 9251da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 9261da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 9271da177e4SLinus Torvalds# set in the environment 9281da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 9291da177e4SLinus Torvalds# this default value 9301da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds# 9331da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 9341da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 9351da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 9361da177e4SLinus Torvalds 9371da177e4SLinus Torvalds# 938f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 939f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 940f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 941f4d4ffc0SJason Cooper# 942f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 943f4d4ffc0SJason Cooper 944f4d4ffc0SJason Cooper# 9451da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 9461da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 947070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 9481da177e4SLinus Torvalds# 9491da177e4SLinus Torvalds 950df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 9511da177e4SLinus Torvaldsexport MODLIB 9521da177e4SLinus Torvalds 953ac031f26STheodore Ts'o# 9542ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 9552ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 9562ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 957177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 9582ea03891SSam Ravnborg 959ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 960ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 9612ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 962ac031f26STheodore Ts'oelse 9632ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 964ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 965ac031f26STheodore Ts'oelse 9662ea03891SSam Ravnborgmod_strip_cmd = true 967ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 968ac031f26STheodore Ts'oexport mod_strip_cmd 969ac031f26STheodore Ts'o 970beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 971beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 972beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ. 973beb50df3SBertrand Jacquin 974beb50df3SBertrand Jacquinmod_compress_cmd = true 975beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS 976beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_GZIP 9773d1450d5SJason A. Donenfeld mod_compress_cmd = gzip -n -f 978beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_GZIP 979beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_XZ 9803d1450d5SJason A. Donenfeld mod_compress_cmd = xz -f 981beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_XZ 982beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS 983beb50df3SBertrand Jacquinexport mod_compress_cmd 984beb50df3SBertrand Jacquin 985d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 9863ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY)) 9873ee550f1SDavid Woodhouse 9883ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 989e2a666d5SRusty Russellelse 990e2a666d5SRusty Russellmod_sign_cmd = true 991e2a666d5SRusty Russellendif 992e2a666d5SRusty Russellexport mod_sign_cmd 993e2a666d5SRusty Russell 994056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 995056d28d1SRolf Eike Beer 9969f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION 9979f0c18aeSJosh Poimboeuf has_libelf := $(call try-run,\ 998056d28d1SRolf Eike Beer echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 9999f0c18aeSJosh Poimboeuf ifeq ($(has_libelf),1) 10009f0c18aeSJosh Poimboeuf objtool_target := tools/objtool FORCE 10019f0c18aeSJosh Poimboeuf else 10029f0c18aeSJosh Poimboeuf SKIP_STACK_VALIDATION := 1 10039f0c18aeSJosh Poimboeuf export SKIP_STACK_VALIDATION 10049f0c18aeSJosh Poimboeuf endif 10059f0c18aeSJosh Poimboeufendif 10069f0c18aeSJosh Poimboeuf 1007e00d8880SMasahiro YamadaPHONY += prepare0 1008e2a666d5SRusty Russell 1009394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order 1010bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps 101147801c97SMasahiro Yamada 10121da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1013cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvaldsvmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 10161da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 101737d9fe47SFeng Wu $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 10181da177e4SLinus Torvalds 10191eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 10201eaca4b9SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 10211eaca4b9SMasahiro Yamada $(drivers-) $(net-) $(libs-) $(virt-)))) 10221da177e4SLinus Torvalds 1023c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 102476cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1025c99f3918SMasahiro Yamada 1026f49821eeSNicholas Piggininit-y := $(patsubst %/, %/built-in.a, $(init-y)) 1027f49821eeSNicholas Piggincore-y := $(patsubst %/, %/built-in.a, $(core-y)) 1028f49821eeSNicholas Piggindrivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1029f49821eeSNicholas Pigginnet-y := $(patsubst %/, %/built-in.a, $(net-y)) 10301da177e4SLinus Torvaldslibs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1031f49821eeSNicholas Pigginlibs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 1032f49821eeSNicholas Pigginvirt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 10331da177e4SLinus Torvalds 10341f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1035d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1036d151e971SMasahiro Yamada $(drivers-y) $(net-y) $(virt-y) 10373a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1) 103895698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 10391f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 104085f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1041233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 10421da177e4SLinus Torvalds 1043d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 10441da177e4SLinus Torvalds 10453fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 10463fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 10472441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 1048c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order 1049ba79d401SNicolas Ferre $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 105086556392SNicolas Pitre "$(MAKE) -f $(srctree)/Makefile vmlinux" 10512441e78bSNicolas Pitreendif 105223121ca2SNicolas Pitre 10531f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 10541f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 10551f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 10561f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS 10571f50b80aSMasahiro Yamada KBUILD_MODULES := 1 10581f50b80aSMasahiro Yamadaendif 10591f50b80aSMasahiro Yamada 106007a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 106107a422bbSMasahiro Yamada 106207a422bbSMasahiro Yamada$(autoksyms_h): 106307a422bbSMasahiro Yamada $(Q)mkdir -p $(dir $@) 106407a422bbSMasahiro Yamada $(Q)touch $@ 106523121ca2SNicolas Pitre 1066fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1067fbe6e37dSNicholas Piggin 1068fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1069fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 1070d503ac53SMasahiro Yamada $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1071fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 10722441e78bSNicolas Pitre 10733fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 10741f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 1075741f98feSSam Ravnborg 1076392885eeSMasahiro Yamadatargets := vmlinux 1077392885eeSMasahiro Yamada 10781da177e4SLinus Torvalds# The actual objects are generated when descending, 10791da177e4SLinus Torvalds# make sure no implicit rule kicks in 1080c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ; 10811da177e4SLinus Torvalds 1082ba97df45SMasahiro Yamadafilechk_kernel.release = \ 10830d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 10840d0e7718SMichal Marek 108583a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 108624512795SMasahiro Yamadainclude/config/kernel.release: FORCE 10870d0e7718SMichal Marek $(call filechk,kernel.release) 1088cb58455cSSam Ravnborg 1089d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1090d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1091d8821622SMasahiro Yamada# in parallel 1092d8821622SMasahiro YamadaPHONY += scripts 109360df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1094d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1095cb58455cSSam Ravnborg 10961da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 10975bb78269SSam Ravnborg# or the modules are listed in "prepare". 10985bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 10995bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 11005bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 11011da177e4SLinus Torvalds 1102a5139fb3SMasahiro YamadaPHONY += prepare archprepare 11035bb78269SSam Ravnborg 110436de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 110530527cefSMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h 11065bb78269SSam Ravnborg 110765bba042SMasahiro Yamadaprepare0: archprepare 110860df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 11098d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 111086feeaa8SSam Ravnborg 11111da177e4SLinus Torvalds# All the preparing.. 1112b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool 1113b9ab5ebbSJosh Poimboeuf 11142c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 11157d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 11167d0e5c20SMasahiro Yamada 11172c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 11182c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1119037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1120037fc336SMasahiro Yamada generic=include/asm-generic 11212c1f4f12SMasahiro Yamadauapi-asm-generic: 1122037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1123037fc336SMasahiro Yamada generic=include/uapi/asm-generic 11242c1f4f12SMasahiro Yamada 1125b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool 11263b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 1127ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1) 1128ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC 1129ef7cfd00SMasahiro Yamada @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1130ef7cfd00SMasahiro Yamada @false 1131ef7cfd00SMasahiro Yamadaelse 1132ef7cfd00SMasahiro Yamada @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1133ef7cfd00SMasahiro Yamadaendif 1134ef7cfd00SMasahiro Yamadaendif 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds# Generate some files 11371da177e4SLinus Torvalds# --------------------------------------------------------------------------- 11381da177e4SLinus Torvalds 11391da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 11401da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 11411da177e4SLinus Torvalds 11421da177e4SLinus Torvaldsuts_len := 64 114363104eecSSam Ravnborgdefine filechk_utsrelease.h 11441da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 11451da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 11461da177e4SLinus Torvalds exit 1; \ 11471da177e4SLinus Torvalds fi; \ 1148ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 11491da177e4SLinus Torvaldsendef 11501da177e4SLinus Torvalds 115163104eecSSam Ravnborgdefine filechk_version.h 1152ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 115378d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1154ad774086SMasahiro Yamada echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 115563104eecSSam Ravnborgendef 115663104eecSSam Ravnborg 115743fee2b2SMasahiro Yamada$(version_h): FORCE 11581da177e4SLinus Torvalds $(call filechk,version.h) 1159223c24a7SMichal Marek $(Q)rm -f $(old_version_h) 11601da177e4SLinus Torvalds 1161273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 116263104eecSSam Ravnborg $(call filechk,utsrelease.h) 116363104eecSSam Ravnborg 1164179efcb4SVegard NossumPHONY += headerdep 1165179efcb4SVegard Nossumheaderdep: 11669663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 11679663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1168179efcb4SVegard Nossum 11691da177e4SLinus Torvalds# --------------------------------------------------------------------------- 11708d730cfbSDavid Woodhouse# Kernel headers 11718d730cfbSDavid Woodhouse 1172e6883b18SSam Ravnborg#Default location for installed headers 1173e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1174e6883b18SSam Ravnborg 117559b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 117659b2bd05SMasahiro Yamada cmd_headers_install = \ 117759b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 117859b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 117959b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 11806d716275SDavid Woodhouse 11818d730cfbSDavid WoodhousePHONY += headers_install 118259b2bd05SMasahiro Yamadaheaders_install: headers 118359b2bd05SMasahiro Yamada $(call cmd,headers_install) 11844f193362SPaul Smith 11851da177e4SLinus TorvaldsPHONY += archheaders archscripts 11861da177e4SLinus Torvalds 1187a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 11881da177e4SLinus Torvalds 118959b2bd05SMasahiro YamadaPHONY += headers 119059b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 11919d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 11922fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1193d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1194d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 11951f85712eSMike Frysinger 1196*7ecaf069SMasahiro Yamada# Deprecated. It is no-op now. 119768475359SDavid WoodhousePHONY += headers_check 1198*7ecaf069SMasahiro Yamadaheaders_check: 1199*7ecaf069SMasahiro Yamada @: 120068475359SDavid Woodhouse 1201e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 120259b2bd05SMasahiro Yamadaprepare: headers 1203e949f4c2SMasahiro Yamadaendif 12041da177e4SLinus Torvalds 1205bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1206bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1207bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1208bdd7714bSMasahiro Yamada 12091da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12105a5da78bSShuah Khan# Kernel selftest 12115a5da78bSShuah Khan 12125a5da78bSShuah KhanPHONY += kselftest 12135a5da78bSShuah Khankselftest: 12142bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 12155a5da78bSShuah Khan 121617eac6c2SShuah Khankselftest-%: FORCE 121717eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1218dcb825a9SWang Long 12193d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 12203d6dee7aSBamvor Jian Zhangkselftest-merge: 12213d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 12226d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 12236d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 12243e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 12253d6dee7aSBamvor Jian Zhang 12265a5da78bSShuah Khan# --------------------------------------------------------------------------- 122737c8a5faSRob Herring# Devicetree files 122837c8a5faSRob Herring 122937c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 123037c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 123137c8a5faSRob Herringendif 123237c8a5faSRob Herring 123337c8a5faSRob Herringifneq ($(dtstree),) 123437c8a5faSRob Herring 1235a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc 123637c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 123737c8a5faSRob Herring 12384f0e3a57SRob HerringPHONY += dtbs dtbs_install dt_binding_check 1239a5139fb3SMasahiro Yamadadtbs dtbs_check: include/config/kernel.release scripts_dtc 124037c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 124137c8a5faSRob Herring 12424f0e3a57SRob Herringdtbs_check: export CHECK_DTBS=1 12434f0e3a57SRob Herringdtbs_check: dt_binding_check 12444f0e3a57SRob Herring 124537c8a5faSRob Herringdtbs_install: 124637c8a5faSRob Herring $(Q)$(MAKE) $(dtbinst)=$(dtstree) 124737c8a5faSRob Herring 124837c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 124937c8a5faSRob Herringall: dtbs 125037c8a5faSRob Herringendif 125137c8a5faSRob Herring 125237c8a5faSRob Herringendif 125337c8a5faSRob Herring 125437c8a5faSRob HerringPHONY += scripts_dtc 125537c8a5faSRob Herringscripts_dtc: scripts_basic 125637c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 125737c8a5faSRob Herring 12584f0e3a57SRob Herringdt_binding_check: scripts_dtc 12594f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 12604f0e3a57SRob Herring 126137c8a5faSRob Herring# --------------------------------------------------------------------------- 12621da177e4SLinus Torvalds# Modules 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvaldsifdef CONFIG_MODULES 12651da177e4SLinus Torvalds 12661da177e4SLinus Torvalds# By default, build modules as well 12671da177e4SLinus Torvalds 126873d1393eSMichal Marekall: modules 12691da177e4SLinus Torvalds 12701da177e4SLinus Torvalds# Build modules 1271551559e1STejun Heo# 1272551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1273551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1274551559e1STejun Heo# using awk while concatenating to the final file. 12751da177e4SLinus Torvalds 12764f193362SPaul SmithPHONY += modules 127768980b47SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin 1278b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 12793a48a919SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 12801da177e4SLinus Torvalds 1281c99f3918SMasahiro Yamadamodules.order: descend 1282c99f3918SMasahiro Yamada $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1283a6c36632SMichal Marek 1284c99f3918SMasahiro Yamadamodbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs)) 1285a6c36632SMichal Marek 128650ef0cdfSMasahiro Yamadamodules.builtin: $(modbuiltin-dirs) 1287c99f3918SMasahiro Yamada $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 12881da177e4SLinus Torvalds 128950ef0cdfSMasahiro YamadaPHONY += $(modbuiltin-dirs) 129050ef0cdfSMasahiro Yamada# tristate.conf is not included from this Makefile. Add it as a prerequisite 129150ef0cdfSMasahiro Yamada# here to make it self-healing in case somebody accidentally removes it. 129250ef0cdfSMasahiro Yamada$(modbuiltin-dirs): include/config/tristate.conf 129350ef0cdfSMasahiro Yamada $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@) 12941da177e4SLinus Torvalds 12951da177e4SLinus Torvalds# Target to prepare building external modules 12964f193362SPaul SmithPHONY += modules_prepare 1297059bc9fcSMasahiro Yamadamodules_prepare: prepare 12981da177e4SLinus Torvalds 12991da177e4SLinus Torvalds# Target to install modules 13004f193362SPaul SmithPHONY += modules_install 13011da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 13021da177e4SLinus Torvalds 13034f193362SPaul SmithPHONY += _modinst_ 13042da30e70SMichal Marek_modinst_: 13051da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 13061da177e4SLinus Torvalds @rm -f $(MODLIB)/source 13071da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 13088e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 13091da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 13101da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 13117e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 13121da177e4SLinus Torvalds fi 13131bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 13141bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin 1315898490c0SAlexey Gladkov @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1316b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 13171da177e4SLinus Torvalds 131850a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 13191da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 13201da177e4SLinus Torvalds# boot script depmod is the master version. 13214f193362SPaul SmithPHONY += _modinst_post 13226d128e1eSLinus Torvalds_modinst_post: _modinst_ 132350a8ec31SSam Ravnborg $(call cmd,depmod) 13241da177e4SLinus Torvalds 1325d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1326d890f510SJosh BoyerPHONY += modules_sign 1327d890f510SJosh Boyermodules_sign: 1328d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1329d890f510SJosh Boyerendif 1330d890f510SJosh Boyer 13311da177e4SLinus Torvaldselse # CONFIG_MODULES 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds# Modules not configured 13341da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13351da177e4SLinus Torvalds 1336612e47ceSMasahiro YamadaPHONY += modules modules_install 1337612e47ceSMasahiro Yamadamodules modules_install: 13385369f550SMichal Marek @echo >&2 13395369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 13405369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 13415369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 13425369f550SMichal Marek @echo >&2 13431da177e4SLinus Torvalds @exit 1 13441da177e4SLinus Torvalds 13451da177e4SLinus Torvaldsendif # CONFIG_MODULES 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds### 13481da177e4SLinus Torvalds# Cleaning is done on three levels. 13491da177e4SLinus Torvalds# make clean Delete most generated files 13501da177e4SLinus Torvalds# Leave enough to build external modules 13511da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 13521da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds# Directories & files removed with 'make clean' 1355b7dca6ddSMasahiro YamadaCLEAN_DIRS += include/ksym 1356bbc55bdeSMasahiro YamadaCLEAN_FILES += modules.builtin.modinfo modules.nsdeps 13571da177e4SLinus Torvalds 13581da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 1359d6fc9fcbSMasahiro YamadaMRPROPER_DIRS += include/config include/generated \ 136046a63d4bSMasahiro Yamada arch/$(SRCARCH)/include/generated .tmp_objdiff \ 136146a63d4bSMasahiro Yamada debian/ snap/ tar-install/ 1362278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \ 136346457133SMasahiro Yamada Module.symvers \ 1364fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1365fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 136646a63d4bSMasahiro Yamada signing_key.x509.signer vmlinux-gdb.py \ 136746a63d4bSMasahiro Yamada *.spec 13681da177e4SLinus Torvalds 136946457133SMasahiro Yamada# Directories & files removed with 'make distclean' 137046457133SMasahiro YamadaDISTCLEAN_DIRS += 137146457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 137246457133SMasahiro Yamada 13731da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 13741da177e4SLinus Torvalds# 13751da177e4SLinus Torvaldsclean: rm-dirs := $(CLEAN_DIRS) 13761da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 13771da177e4SLinus Torvalds 137876cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 13791da177e4SLinus Torvalds 1380bd1ee804SPawel Mollvmlinuxclean: 1381bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1382fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1383bd1ee804SPawel Moll 1384bd1ee804SPawel Mollclean: archclean vmlinuxclean 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 13871da177e4SLinus Torvalds# 13881da177e4SLinus Torvaldsmrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 13891da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1390cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 13911da177e4SLinus Torvalds 1392b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 13931da177e4SLinus Torvalds$(mrproper-dirs): 13941da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 13951da177e4SLinus Torvalds 1396b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 13971da177e4SLinus Torvalds $(call cmd,rmdirs) 13981da177e4SLinus Torvalds $(call cmd,rmfiles) 13991da177e4SLinus Torvalds 14001da177e4SLinus Torvalds# distclean 14011da177e4SLinus Torvalds# 140246457133SMasahiro Yamadadistclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) 140346457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 140446457133SMasahiro Yamada 14054f193362SPaul SmithPHONY += distclean 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvaldsdistclean: mrproper 140846457133SMasahiro Yamada $(call cmd,rmdirs) 140946457133SMasahiro Yamada $(call cmd,rmfiles) 14101da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 14111da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1412f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1413f78271dfSMasahiro Yamada -o -name 'core' \) \ 14141da177e4SLinus Torvalds -type f -print | xargs rm -f 14151da177e4SLinus Torvalds 14161da177e4SLinus Torvalds 14171da177e4SLinus Torvalds# Packaging of the kernel to various formats 14181da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14191da177e4SLinus Torvalds 1420bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1421000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1422031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1423000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds# Brief documentation of the typical targets used 14261da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14271da177e4SLinus Torvalds 14285dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1429a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 14305dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 14315dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 14321da177e4SLinus Torvalds 1433fe69b420SMasahiro YamadaPHONY += help 14341da177e4SLinus Torvaldshelp: 14351da177e4SLinus Torvalds @echo 'Cleaning targets:' 14365ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 14375cc8d246SJesper Juhl @echo ' enough build support to build external modules' 14385ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 14395cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 14401da177e4SLinus Torvalds @echo '' 14411da177e4SLinus Torvalds @echo 'Configuration targets:' 14421da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 14431da177e4SLinus Torvalds @echo '' 14441da177e4SLinus Torvalds @echo 'Other generic targets:' 14451da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 14461da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 14471da177e4SLinus Torvalds @echo '* modules - Build all modules' 14489cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 14491da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 145040ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1451433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1452433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 145362718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 145462718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1455155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1456c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 14571da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 14581da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1459f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 14603f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 14613f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 14623f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 14632fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 146459df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 14652fb9b1bdSSam Ravnborg echo '' 146631b8cc80SRandy Dunlap @echo 'Static analysers:' 14671da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 14681da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1469aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1470ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1471295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 147274425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 14737f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 147474425eeeSNicolas Palix @echo '' 1475eb8305aeSMatthias Maennich @echo 'Tools:' 1476eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1477eb8305aeSMatthias Maennich @echo '' 147831b8cc80SRandy Dunlap @echo 'Kernel selftest:' 14795a5da78bSShuah Khan @echo ' kselftest - Build and run kernel selftest (run as root)' 14805a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 14815a5da78bSShuah Khan @echo ' running kselftest on it' 1482dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1483bbfe63b6SRandy Dunlap @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 14843d6dee7aSBamvor Jian Zhang @echo ' .config.' 14855a5da78bSShuah Khan @echo '' 148637c8a5faSRob Herring @$(if $(dtstree), \ 148737c8a5faSRob Herring echo 'Devicetree:'; \ 148837c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 148937c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 14907aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 14917aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 149237c8a5faSRob Herring echo '') 149337c8a5faSRob Herring 149431b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 149531b8cc80SRandy Dunlap @echo ' use "make tools/help"' 149631b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 149731b8cc80SRandy Dunlap @echo '' 14981da177e4SLinus Torvalds @echo 'Kernel packaging:' 1499000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 15001da177e4SLinus Torvalds @echo '' 15011da177e4SLinus Torvalds @echo 'Documentation targets:' 1502cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 15031da177e4SLinus Torvalds @echo '' 150401dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 15051da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 150601dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 15071da177e4SLinus Torvalds @echo '' 15081da177e4SLinus Torvalds @$(if $(boards), \ 15091da177e4SLinus Torvalds $(foreach b, $(boards), \ 15104234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 15111da177e4SLinus Torvalds echo '') 15125dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 15135dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 15145dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 15155dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 15165dffbe81SSegher Boessenkool echo '') 15171da177e4SLinus Torvalds 15181da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 151945d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 15201da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1521a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1522a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1523701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1524af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1525e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 152628bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 152728bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 152828bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1529a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 15301da177e4SLinus Torvalds @echo '' 15311da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 15321da177e4SLinus Torvalds @echo 'For further info see the ./README file' 15331da177e4SLinus Torvalds 15341da177e4SLinus Torvalds 15355dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 15365dffbe81SSegher Boessenkool 15375dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 15385dffbe81SSegher Boessenkool 1539fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 15405dffbe81SSegher Boessenkool 15415dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 15425dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 15435dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 15445dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 15455dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 15465dffbe81SSegher Boessenkool echo '') 15475dffbe81SSegher Boessenkool 15485dffbe81SSegher Boessenkool 15491da177e4SLinus Torvalds# Documentation targets 15501da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1551e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1552e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 155322cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1554bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1555cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 15561da177e4SLinus Torvalds 155767274c08SMasahiro Yamada# Misc 155867274c08SMasahiro Yamada# --------------------------------------------------------------------------- 155967274c08SMasahiro Yamada 156067274c08SMasahiro YamadaPHONY += scripts_gdb 15617a739ce5SMasahiro Yamadascripts_gdb: prepare0 15621e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 15638d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 156467274c08SMasahiro Yamada 156567274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 156667274c08SMasahiro Yamadaall: scripts_gdb 156767274c08SMasahiro Yamadaendif 156867274c08SMasahiro Yamada 15691da177e4SLinus Torvaldselse # KBUILD_EXTMOD 15701da177e4SLinus Torvalds 15711da177e4SLinus Torvalds### 15721da177e4SLinus Torvalds# External module support. 15731da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 15741da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 15751da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 15761da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 15771da177e4SLinus Torvalds# be used. 15781da177e4SLinus Torvalds# 15791da177e4SLinus Torvalds# The following are the only valid targets when building external 15801da177e4SLinus Torvalds# modules. 15811da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 15821da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 15831da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 15841da177e4SLinus Torvalds# make M=dir modules_install 1585070b98bfSSam Ravnborg# Install the modules built in the module directory 15861da177e4SLinus Torvalds# Assumes install directory is already created 15871da177e4SLinus Torvalds 15881da177e4SLinus Torvalds# We are always building modules 15891da177e4SLinus TorvaldsKBUILD_MODULES := 1 15901da177e4SLinus Torvalds 15914f193362SPaul SmithPHONY += $(objtree)/Module.symvers 15921da177e4SLinus Torvalds$(objtree)/Module.symvers: 15931da177e4SLinus Torvalds @test -e $(objtree)/Module.symvers || ( \ 15941da177e4SLinus Torvalds echo; \ 15951da177e4SLinus Torvalds echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 15961da177e4SLinus Torvalds echo " is missing; modules will have no dependencies and modversions."; \ 15971da177e4SLinus Torvalds echo ) 15981da177e4SLinus Torvalds 1599c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 1600c99f3918SMasahiro YamadaPHONY += modules 1601c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers 1602b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 16031da177e4SLinus Torvalds 16044f193362SPaul SmithPHONY += modules_install 1605a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1606a67dc21aSSam Ravnborg 1607a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 16084f193362SPaul SmithPHONY += _emodinst_ 1609a67dc21aSSam Ravnborg_emodinst_: 1610a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1611b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 16121da177e4SLinus Torvalds 16134f193362SPaul SmithPHONY += _emodinst_post 1614a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1615a67dc21aSSam Ravnborg $(call cmd,depmod) 1616a67dc21aSSam Ravnborg 161776cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 1618bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps 16191da177e4SLinus Torvalds 1620d4945049SMasahiro YamadaPHONY += / 1621d4945049SMasahiro Yamada/: 1622d4945049SMasahiro Yamada @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' 1623d4945049SMasahiro Yamada 1624fe69b420SMasahiro YamadaPHONY += help 16251da177e4SLinus Torvaldshelp: 16261da177e4SLinus Torvalds @echo ' Building external modules.' 16271da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 16281da177e4SLinus Torvalds @echo '' 16291da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 16301da177e4SLinus Torvalds @echo ' modules_install - install the module' 16311da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 16321da177e4SLinus Torvalds @echo '' 163306300b21SSam Ravnborg 1634059bc9fcSMasahiro YamadaPHONY += prepare 16351da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 16361da177e4SLinus Torvalds 1637c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1638c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1639c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1640c99f3918SMasahiro Yamada# make menuconfig etc. 1641c99f3918SMasahiro Yamada# Error messages still appears in the original language 1642c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 1643c99f3918SMasahiro Yamadadescend: $(build-dirs) 1644c99f3918SMasahiro Yamada$(build-dirs): prepare 1645394053f4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ single-build=$(single-build) need-builtin=1 need-modorder=1 1646c99f3918SMasahiro Yamada 164776cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 164876cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 164976cd306dSMasahiro Yamada$(clean-dirs): 165076cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 165176cd306dSMasahiro Yamada 165288d7be03SMichal Marekclean: $(clean-dirs) 165388d7be03SMichal Marek $(call cmd,rmdirs) 165488d7be03SMichal Marek $(call cmd,rmfiles) 165543f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1656ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 16574f0e3a57SRob Herring -o -name '*.ko.*' \ 16584f0e3a57SRob Herring -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1659ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 1660bbc55bdeSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 166188d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 16629a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 16634fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 166488d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 166588d7be03SMichal Marek -o -name modules.builtin -o -name '.tmp_*.o.*' \ 16666b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1667433db3e2SVinÃcius Tinti -o -name '*.ll' \ 166888d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 166988d7be03SMichal Marek 16701da177e4SLinus Torvalds# Generate tags for editors 16711da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1672a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1673858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 16741da177e4SLinus Torvalds 1675f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 16761da177e4SLinus Torvalds $(call cmd,tags) 16771da177e4SLinus Torvalds 1678eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1679eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1680eb8305aeSMatthias Maennich 1681eb8305aeSMatthias MaennichPHONY += nsdeps 1682bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1683eb8305aeSMatthias Maennichnsdeps: modules 1684bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1685eb8305aeSMatthias Maennich 16861da177e4SLinus Torvalds# Scripts to check various things for consistency 16871da177e4SLinus Torvalds# --------------------------------------------------------------------------- 16881da177e4SLinus Torvalds 1689279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1690279f3dd3SPeter Foley 16911da177e4SLinus Torvaldsincludecheck: 1692436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 16931da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 169480007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 16951da177e4SLinus Torvalds 16961da177e4SLinus Torvaldsversioncheck: 16972ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 16981da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 169980007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 17001da177e4SLinus Torvalds 170174425eeeSNicolas Palixcoccicheck: 1702858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 170374425eeeSNicolas Palix 17041da177e4SLinus Torvaldsnamespacecheck: 17051da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 17061da177e4SLinus Torvalds 1707295ac051SAdrian Bunkexport_report: 1708295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1709295ac051SAdrian Bunk 1710c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1711e3ccf6e3SJeff Dike 1712011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1713011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1714011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1715011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1716011e3a9aSJeff Dikeifeq ($(ARCH), um) 1717011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1718011e3a9aSJeff Dikeelse 1719011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1720011e3a9aSJeff Dikeendif 17211da177e4SLinus Torvaldscheckstack: 17221da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 172375dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 17241da177e4SLinus Torvalds 17257b8ea53dSAmerigo Wangkernelrelease: 17267b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 172701ab1788SAmerigo Wang 1728cb58455cSSam Ravnborgkernelversion: 17292244cbd8SSam Ravnborg @echo $(KERNELVERSION) 17301da177e4SLinus Torvalds 1731c398ff00SMike Marciniszynimage_name: 1732c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1733c398ff00SMike Marciniszyn 1734ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1735f47a23ceSMasahiro Yamada 1736f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_) 1737f47a23ceSMasahiro Yamadatools_silent=s 1738f47a23ceSMasahiro Yamadaendif 1739f47a23ceSMasahiro Yamada 1740ea01fa9fSBorislav Petkovtools/: FORCE 1741bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 174275dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1743ea01fa9fSBorislav Petkov 1744ea01fa9fSBorislav Petkovtools/%: FORCE 1745bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 174675dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1747ea01fa9fSBorislav Petkov 174806300b21SSam Ravnborg# Single targets 174906300b21SSam Ravnborg# --------------------------------------------------------------------------- 1750394053f4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1751bc2546a6SSam Ravnborg# 1752394053f4SMasahiro Yamada# make foo/bar/baz.s 1753394053f4SMasahiro Yamada# 1754394053f4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1755394053f4SMasahiro Yamada# 1756394053f4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1757394053f4SMasahiro Yamada# 1758394053f4SMasahiro Yamada# make foo/bar/baz/ 175906300b21SSam Ravnborg 1760394053f4SMasahiro Yamadaifdef single-build 176106300b21SSam Ravnborg 1762394053f4SMasahiro Yamada# .ko is special because modpost is needed 176335e046a2SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 176435e046a2SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1765394053f4SMasahiro Yamada 1766394053f4SMasahiro Yamada$(single-ko): single_modpost 1767394053f4SMasahiro Yamada @: 1768394053f4SMasahiro Yamada$(single-no-ko): descend 1769394053f4SMasahiro Yamada @: 1770394053f4SMasahiro Yamada 177147801c97SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1772394053f4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 177347801c97SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1774394053f4SMasahiro YamadaMODORDER := .modules.tmp 177547801c97SMasahiro Yamadaendif 1776394053f4SMasahiro Yamada 1777394053f4SMasahiro YamadaPHONY += single_modpost 1778394053f4SMasahiro Yamadasingle_modpost: $(single-no-ko) 1779394053f4SMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 178047801c97SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1781bc2546a6SSam Ravnborg 1782394053f4SMasahiro YamadaKBUILD_MODULES := 1 17836d3c94e4SMasahiro Yamada 1784394053f4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1785394053f4SMasahiro Yamada 1786394053f4SMasahiro Yamadasingle-build = $(if $(filter-out $@/, $(single-no-ko)),1) 1787394053f4SMasahiro Yamada 1788394053f4SMasahiro Yamadaendif 178906300b21SSam Ravnborg 17901da177e4SLinus Torvalds# FIXME Should go into a make.lib or something 17911da177e4SLinus Torvalds# =========================================================================== 17921da177e4SLinus Torvalds 17931da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 17941da177e4SLinus Torvalds cmd_rmdirs = rm -rf $(rm-dirs) 17951da177e4SLinus Torvalds 17961da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 17971da177e4SLinus Torvalds cmd_rmfiles = rm -f $(rm-files) 17981da177e4SLinus Torvalds 1799bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 180050a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1801569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 18025a144a1aSMasahiro Yamada $(KERNELRELEASE) 180350a8ec31SSam Ravnborg 1804392885eeSMasahiro Yamada# read saved command lines for existing targets 1805392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 18061da177e4SLinus Torvalds 1807b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 18081da177e4SLinus Torvalds 18092042b548SMasahiro Yamadaendif # config-targets 18102042b548SMasahiro Yamadaendif # mixed-build 1811688931a5SMasahiro Yamadaendif # need-sub-make 18121da177e4SLinus Torvalds 18134f193362SPaul SmithPHONY += FORCE 18141da177e4SLinus TorvaldsFORCE: 18154f193362SPaul Smith 1816bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1817fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 18184f193362SPaul Smith.PHONY: $(PHONY) 1819