1 b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2 c517d838SLinus TorvaldsVERSION = 4 3 65102238SLinus TorvaldsPATCHLEVEL = 20 4 55922c9dSLinus TorvaldsSUBLEVEL = 0 5 ccda4af0SLinus TorvaldsEXTRAVERSION = -rc2 6 84df9525SGreg Kroah-HartmanNAME = "People's Front" 7 1da177e4SLinus Torvalds 8 1da177e4SLinus Torvalds# *DOCUMENTATION* 9 1da177e4SLinus Torvalds# To see a list of typical targets execute "make help" 10 1da177e4SLinus Torvalds# More info can be located in ./README 11 1da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not 12 1da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file. 13 1da177e4SLinus Torvalds 14 ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 15 ba634eceSMasahiro YamadaPHONY := _all 16 ba634eceSMasahiro Yamada_all: 17 ba634eceSMasahiro Yamada 18 80463f1bSMasahiro Yamada# Do not use make's built-in rules and variables 19 80463f1bSMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 20 80463f1bSMasahiro YamadaMAKEFLAGS += -rR 21 1da177e4SLinus Torvalds 22 c051346bSH. Peter Anvin# Avoid funny character set dependencies 23 06b5dc64SH. Peter Anvinunexport LC_ALL 24 c051346bSH. Peter AnvinLC_COLLATE=C 25 c051346bSH. Peter AnvinLC_NUMERIC=C 26 07105202SMichal Marekexport LC_COLLATE LC_NUMERIC 27 c051346bSH. Peter Anvin 28 ab7474eaSBorislav Petkov# Avoid interference with shell env settings 29 ab7474eaSBorislav Petkovunexport GREP_OPTIONS 30 ab7474eaSBorislav Petkov 31 1da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 32 1da177e4SLinus Torvalds# to get the ordering right. 33 1da177e4SLinus Torvalds# 34 1da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 35 1da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 36 1da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 37 f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 38 1da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 39 1da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 40 1da177e4SLinus Torvalds# is now up to date. 41 1da177e4SLinus Torvalds# 42 1da177e4SLinus Torvalds# The only cases where we need to modify files which have global 43 1da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 44 1da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 45 1da177e4SLinus Torvalds# prepare rule. 46 1da177e4SLinus Torvalds 47 066b7ed9SMichal Marek# Beautify output 48 066b7ed9SMichal Marek# --------------------------------------------------------------------------- 49 066b7ed9SMichal Marek# 50 066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 51 066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 52 066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 53 066b7ed9SMichal Marek# 54 066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 55 066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 56 066b7ed9SMichal Marek# 57 066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 58 066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 59 066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 60 066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 61 066b7ed9SMichal Marek# 62 066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 63 066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 64 066b7ed9SMichal Marek# 65 066b7ed9SMichal Marek# $(Q)ln $@ :< 66 066b7ed9SMichal Marek# 67 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 68 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 69 066b7ed9SMichal Marek# 70 1da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 71 1da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 72 1da177e4SLinus Torvalds 73 1da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 74 1da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 75 1da177e4SLinus Torvaldsendif 76 1da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 77 1da177e4SLinus Torvalds KBUILD_VERBOSE = 0 78 1da177e4SLinus Torvaldsendif 79 1da177e4SLinus Torvalds 80 066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 81 066b7ed9SMichal Marek quiet = 82 066b7ed9SMichal Marek Q = 83 066b7ed9SMichal Marekelse 84 066b7ed9SMichal Marek quiet=quiet_ 85 066b7ed9SMichal Marek Q = @ 86 066b7ed9SMichal Marekendif 87 066b7ed9SMichal Marek 88 066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 89 066b7ed9SMichal Marek# commands 90 066b7ed9SMichal Marek 91 6f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 92 066b7ed9SMichal Marek quiet=silent_ 93 e572d088SJosh Poimboeuf tools_silent=s 94 066b7ed9SMichal Marekendif 95 066b7ed9SMichal Marek 96 066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 97 066b7ed9SMichal Marek 98 1da177e4SLinus Torvalds# kbuild supports saving output files in a separate directory. 99 1da177e4SLinus Torvalds# To locate output files in a separate directory two syntaxes are supported. 100 1da177e4SLinus Torvalds# In both cases the working directory must be the root of the kernel src. 101 1da177e4SLinus Torvalds# 1) O= 102 1da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 103 1da177e4SLinus Torvalds# 104 1da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 105 1da177e4SLinus Torvalds# Set the environment variable KBUILD_OUTPUT to point to the directory 106 1da177e4SLinus Torvalds# where the output files shall be placed. 107 1da177e4SLinus Torvalds# export KBUILD_OUTPUT=dir/to/store/output/files/ 108 1da177e4SLinus Torvalds# make 109 1da177e4SLinus Torvalds# 110 1da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 111 1da177e4SLinus Torvalds# variable. 112 1da177e4SLinus Torvalds 113 c4e6fff1SCao jin# KBUILD_SRC is not intended to be used by the regular user (for now), 114 c4e6fff1SCao jin# it is set on invocation of make with KBUILD_OUTPUT or O= specified. 115 1da177e4SLinus Torvaldsifeq ($(KBUILD_SRC),) 116 1da177e4SLinus Torvalds 117 1da177e4SLinus Torvalds# OK, Make called in directory where kernel src resides 118 1da177e4SLinus Torvalds# Do we want to locate output files in a separate directory? 119 1da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 120 1da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 121 1da177e4SLinus Torvaldsendif 122 1da177e4SLinus Torvalds 123 1cacc9abSSam Ravnborg# Cancel implicit rules on top Makefile 124 1cacc9abSSam Ravnborg$(CURDIR)/Makefile Makefile: ; 125 1cacc9abSSam Ravnborg 126 51193b76SRobert Jarzmikifneq ($(words $(subst :, ,$(CURDIR))), 1) 127 51193b76SRobert Jarzmik $(error main directory cannot contain spaces nor colons) 128 51193b76SRobert Jarzmikendif 129 51193b76SRobert Jarzmik 130 1da177e4SLinus Torvaldsifneq ($(KBUILD_OUTPUT),) 131 1da177e4SLinus Torvalds# check that the output directory actually exists 132 1da177e4SLinus Torvaldssaved-output := $(KBUILD_OUTPUT) 133 028568d8SMasahiro YamadaKBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ 134 16f8259cSBjørn Forsman && pwd) 135 1da177e4SLinus Torvalds$(if $(KBUILD_OUTPUT),, \ 136 1c9e70a5SMasahiro Yamada $(error failed to create output directory "$(saved-output)")) 137 1da177e4SLinus Torvalds 138 80463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 139 80463f1bSMasahiro Yamada# 140 80463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed 141 80463f1bSMasahiro Yamada# once after the Makefile is read. It is OK since we are going to invoke 142 80463f1bSMasahiro Yamada# 'sub-make' below. 143 80463f1bSMasahiro YamadaMAKEFLAGS += --include-dir=$(CURDIR) 144 80463f1bSMasahiro Yamada 145 0b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make 146 0b35786dSMilton Miller 147 1cacc9abSSam Ravnborg$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 148 16f89098SCharles Keepax @: 149 0b35786dSMilton Miller 150 c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 151 2e8d696bSMasahiro Yamadasub-make: 152 745a2543SMasahiro Yamada $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ 153 aa55c8e2SMasahiro Yamada -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) 154 1da177e4SLinus Torvalds 155 1da177e4SLinus Torvalds# Leave processing to above invocation of make 156 1da177e4SLinus Torvaldsskip-makefile := 1 157 1da177e4SLinus Torvaldsendif # ifneq ($(KBUILD_OUTPUT),) 158 1da177e4SLinus Torvaldsendif # ifeq ($(KBUILD_SRC),) 159 1da177e4SLinus Torvalds 160 1da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 161 1da177e4SLinus Torvaldsifeq ($(skip-makefile),) 162 1da177e4SLinus Torvalds 163 7ff52571SMasahiro Yamada# Do not print "Entering directory ...", 164 7ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 165 7ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 166 7ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 167 7ff52571SMasahiro Yamada 168 aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 169 aa55c8e2SMasahiro Yamada# C compilation. 170 aa55c8e2SMasahiro Yamada# 171 aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 172 aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 173 aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not. 174 aa55c8e2SMasahiro Yamada# 175 036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details, 176 036db11cSCao jin# including where to get the "sparse" utility. 177 aa55c8e2SMasahiro Yamada 178 aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line") 179 aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = $(C) 180 aa55c8e2SMasahiro Yamadaendif 181 aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC 182 aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = 0 183 aa55c8e2SMasahiro Yamadaendif 184 aa55c8e2SMasahiro Yamada 185 aa55c8e2SMasahiro Yamada# Use make M=dir to specify directory of external module to build 186 aa55c8e2SMasahiro Yamada# Old syntax make ... SUBDIRS=$PWD is still supported 187 aa55c8e2SMasahiro Yamada# Setting the environment variable KBUILD_EXTMOD take precedence 188 aa55c8e2SMasahiro Yamadaifdef SUBDIRS 189 0126be38SMasahiro Yamada $(warning ================= WARNING ================) 190 0126be38SMasahiro Yamada $(warning 'SUBDIRS' will be removed after Linux 5.3) 191 0126be38SMasahiro Yamada $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) 192 0126be38SMasahiro Yamada $(warning ==========================================) 193 aa55c8e2SMasahiro Yamada KBUILD_EXTMOD ?= $(SUBDIRS) 194 aa55c8e2SMasahiro Yamadaendif 195 aa55c8e2SMasahiro Yamada 196 aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line") 197 aa55c8e2SMasahiro Yamada KBUILD_EXTMOD := $(M) 198 aa55c8e2SMasahiro Yamadaendif 199 aa55c8e2SMasahiro Yamada 200 9da0763bSMichal Marekifeq ($(KBUILD_SRC),) 201 9da0763bSMichal Marek # building in the source tree 202 9da0763bSMichal Marek srctree := . 203 9da0763bSMichal Marekelse 204 9da0763bSMichal Marek ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 205 9da0763bSMichal Marek # building in a subdirectory of the source tree 206 9da0763bSMichal Marek srctree := .. 207 9da0763bSMichal Marek else 208 9da0763bSMichal Marek srctree := $(KBUILD_SRC) 209 9da0763bSMichal Marek endif 210 9da0763bSMichal Marekendif 211 2c1f4f12SMasahiro Yamada 212 2c1f4f12SMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC 213 2c1f4f12SMasahiro Yamada 214 7e1c0477SMichal Marekobjtree := . 215 1da177e4SLinus Torvaldssrc := $(srctree) 216 1da177e4SLinus Torvaldsobj := $(objtree) 217 1da177e4SLinus Torvalds 218 0f558c33SMattia DongiliVPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 219 1da177e4SLinus Torvalds 220 11294235SAmerigo Wangexport srctree objtree VPATH 221 1da177e4SLinus Torvalds 222 2c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 223 2c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 224 2c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 225 2c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 226 2c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 227 2c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 228 2c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 229 2c1f4f12SMasahiro Yamada 230 2c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 231 2c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h 232 2c1f4f12SMasahiro Yamada 233 22340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 234 22340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 235 2c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 236 2c1f4f12SMasahiro Yamada $(version_h) headers_% archheaders archscripts \ 237 63e31a67SMasahiro Yamada %asm-generic kernelversion %src-pkg 238 a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \ 239 a29d4d8cSMasahiro Yamada kernelrelease 240 2c1f4f12SMasahiro Yamada 241 2c1f4f12SMasahiro Yamadaconfig-targets := 0 242 2c1f4f12SMasahiro Yamadamixed-targets := 0 243 2c1f4f12SMasahiro Yamadadot-config := 1 244 d7942413SMasahiro Yamadamay-sync-config := 1 245 2c1f4f12SMasahiro Yamada 246 2c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 247 2c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 248 2c1f4f12SMasahiro Yamada dot-config := 0 249 2c1f4f12SMasahiro Yamada endif 250 2c1f4f12SMasahiro Yamadaendif 251 2c1f4f12SMasahiro Yamada 252 d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 253 d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 254 d7942413SMasahiro Yamada may-sync-config := 0 255 d7942413SMasahiro Yamada endif 256 d7942413SMasahiro Yamadaendif 257 d7942413SMasahiro Yamada 258 d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 259 d7942413SMasahiro Yamada may-sync-config := 0 260 d7942413SMasahiro Yamadaendif 261 d7942413SMasahiro Yamada 262 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 263 2c1f4f12SMasahiro Yamada ifneq ($(filter config %config,$(MAKECMDGOALS)),) 264 2c1f4f12SMasahiro Yamada config-targets := 1 265 2c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 266 2c1f4f12SMasahiro Yamada mixed-targets := 1 267 2c1f4f12SMasahiro Yamada endif 268 2c1f4f12SMasahiro Yamada endif 269 2c1f4f12SMasahiro Yamadaendif 270 22340a06SMasahiro Yamada 271 22340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 272 22340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 273 22340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 274 22340a06SMasahiro Yamada mixed-targets := 1 275 22340a06SMasahiro Yamada endif 276 22340a06SMasahiro Yamadaendif 277 22340a06SMasahiro Yamada 278 2c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 279 2c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 280 2c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 281 2c1f4f12SMasahiro Yamada mixed-targets := 1 282 2c1f4f12SMasahiro Yamada endif 283 2c1f4f12SMasahiro Yamadaendif 284 2c1f4f12SMasahiro Yamada 285 2c1f4f12SMasahiro Yamadaifeq ($(mixed-targets),1) 286 2c1f4f12SMasahiro Yamada# =========================================================================== 287 2c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 288 2c1f4f12SMasahiro Yamada# Handle them one by one. 289 2c1f4f12SMasahiro Yamada 290 2c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 291 2c1f4f12SMasahiro Yamada 292 2c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 293 2c1f4f12SMasahiro Yamada @: 294 2c1f4f12SMasahiro Yamada 295 2c1f4f12SMasahiro Yamada__build_one_by_one: 296 2c1f4f12SMasahiro Yamada $(Q)set -e; \ 297 2c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 298 2c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 299 2c1f4f12SMasahiro Yamada done 300 2c1f4f12SMasahiro Yamada 301 2c1f4f12SMasahiro Yamadaelse 302 2c1f4f12SMasahiro Yamada 303 2c1f4f12SMasahiro Yamada# We need some generic definitions (do not try to remake the file). 304 2c1f4f12SMasahiro Yamadascripts/Kbuild.include: ; 305 2c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include 306 2c1f4f12SMasahiro Yamada 307 2c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 308 2c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 309 2c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 310 2c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 311 2c1f4f12SMasahiro Yamada 312 b2d35fa5SAnders Roxellinclude scripts/subarch.include 313 1da177e4SLinus Torvalds 314 1da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 315 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 316 1da177e4SLinus Torvalds# 317 1da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 318 1da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 319 1da177e4SLinus Torvalds# ARCH can be set during invocation of make: 320 1da177e4SLinus Torvalds# make ARCH=ia64 321 1da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 322 1da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 323 1da177e4SLinus Torvalds 324 1da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 325 1da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 326 1da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 327 1da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 328 1da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 329 1da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 330 1da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 331 1da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 332 2331d1a6SSam RavnborgARCH ?= $(SUBARCH) 333 1da177e4SLinus Torvalds 334 1da177e4SLinus Torvalds# Architecture as present in compile.h 335 1da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 336 6752ed90SThomas GleixnerSRCARCH := $(ARCH) 337 1da177e4SLinus Torvalds 338 d746d647SSam Ravnborg# Additional ARCH settings for x86 339 d746d647SSam Ravnborgifeq ($(ARCH),i386) 340 d746d647SSam Ravnborg SRCARCH := x86 341 d746d647SSam Ravnborgendif 342 d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 343 d746d647SSam Ravnborg SRCARCH := x86 344 d746d647SSam Ravnborgendif 345 74b469f2SSam Ravnborg 346 5e538790SSam Ravnborg# Additional ARCH settings for sparc 347 e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 348 e69f58c0SNamhyung Kim SRCARCH := sparc 349 e69f58c0SNamhyung Kimendif 350 a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 351 5e538790SSam Ravnborg SRCARCH := sparc 352 a439fe51SSam Ravnborgendif 353 2fb9b1bdSSam Ravnborg 354 3cc000b5SPaul Mundt# Additional ARCH settings for sh 355 3cc000b5SPaul Mundtifeq ($(ARCH),sh64) 356 3cc000b5SPaul Mundt SRCARCH := sh 357 3cc000b5SPaul Mundtendif 358 3cc000b5SPaul Mundt 359 14cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 360 41263fc6SBen Gardinerexport KCONFIG_CONFIG 361 14cdd3c4SRoman Zippel 362 1da177e4SLinus Torvalds# SHELL used by kbuild 363 1da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 364 1da177e4SLinus Torvalds else if [ -x /bin/bash ]; then echo /bin/bash; \ 365 1da177e4SLinus Torvalds else echo sh; fi ; fi) 366 1da177e4SLinus Torvalds 367 6d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 368 6d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 369 6d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 370 d7f14c66SUwe Kleine-König 371 1da177e4SLinus TorvaldsHOSTCC = gcc 372 1da177e4SLinus TorvaldsHOSTCXX = g++ 373 96f14fe7SLaura AbbottKBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 374 f92d19e0SLaura Abbott -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 375 f92d19e0SLaura Abbott $(HOSTCFLAGS) 376 f92d19e0SLaura AbbottKBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 377 f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 378 f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 379 1da177e4SLinus Torvalds 380 1da177e4SLinus Torvalds# Make variables (CC, etc...) 381 1da177e4SLinus TorvaldsAS = $(CROSS_COMPILE)as 382 1da177e4SLinus TorvaldsLD = $(CROSS_COMPILE)ld 383 1da177e4SLinus TorvaldsCC = $(CROSS_COMPILE)gcc 384 1da177e4SLinus TorvaldsCPP = $(CC) -E 385 1da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 386 1da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 387 1da177e4SLinus TorvaldsSTRIP = $(CROSS_COMPILE)strip 388 1da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 389 1da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 390 73a4f6dbSMasahiro YamadaLEX = flex 391 73a4f6dbSMasahiro YamadaYACC = bison 392 1da177e4SLinus TorvaldsAWK = awk 393 1da177e4SLinus TorvaldsGENKSYMS = scripts/genksyms/genksyms 394 caa27b66SSam RavnborgINSTALLKERNEL := installkernel 395 1da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 396 1da177e4SLinus TorvaldsPERL = perl 397 011bf125SMasahiro YamadaPYTHON = python 398 e9781b52SMasahiro YamadaPYTHON2 = python2 399 e9781b52SMasahiro YamadaPYTHON3 = python3 400 1da177e4SLinus TorvaldsCHECK = sparse 401 1da177e4SLinus Torvalds 402 80a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 403 6c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 404 b36fad65SMichal MarekNOSTDINC_FLAGS = 405 6588169dSSam RavnborgCFLAGS_MODULE = 406 6588169dSSam RavnborgAFLAGS_MODULE = 407 6588169dSSam RavnborgLDFLAGS_MODULE = 408 1da177e4SLinus TorvaldsCFLAGS_KERNEL = 409 1da177e4SLinus TorvaldsAFLAGS_KERNEL = 410 b36fad65SMichal MarekLDFLAGS_vmlinux = 411 1da177e4SLinus Torvalds 412 abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 413 abbf1590SDavid HowellsUSERINCLUDE := \ 414 9d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 415 9d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 416 abbf1590SDavid Howells -I$(srctree)/include/uapi \ 417 3308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 418 abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 419 abbf1590SDavid Howells 420 1da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 421 1da177e4SLinus Torvalds# Needed to be compatible with the O= option 422 abbf1590SDavid HowellsLINUXINCLUDE := \ 423 9d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 424 9d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 425 96f13045SSam Ravnborg $(if $(KBUILD_SRC), -I$(srctree)/include) \ 426 f8224f7fSMasahiro Yamada -I$(objtree)/include \ 427 f8224f7fSMasahiro Yamada $(USERINCLUDE) 428 1da177e4SLinus Torvalds 429 433dc2ebSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ 430 a0f97e06SSam RavnborgKBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 431 8c97023cSArnd Bergmann -fno-strict-aliasing -fno-common -fshort-wchar \ 432 a8735821SFloris Kraak -Werror-implicit-function-declaration \ 433 51b97e35SKirill A. Shutemov -Wno-format-security \ 434 433dc2ebSMasahiro Yamada -std=gnu89 435 433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 436 80c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 437 80c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 438 6588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 439 6588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 440 6588169dSSam RavnborgKBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 441 d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 442 433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS := 443 1da177e4SLinus Torvalds 444 96f14fe7SLaura Abbottexport ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 445 8377bd2bSLaura Abbottexport CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS 446 e9781b52SMasahiro Yamadaexport MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE 447 10844aebSLaura Abbottexport HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 448 1da177e4SLinus Torvalds 449 d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 450 0e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 451 0e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 452 222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 453 6588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 454 80c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 455 40df759eSMichal Marekexport KBUILD_ARFLAGS 456 1da177e4SLinus Torvalds 457 1da177e4SLinus Torvalds# When compiling out-of-tree modules, put MODVERDIR in the module 458 1da177e4SLinus Torvalds# tree rather than in the kernel tree. The kernel tree might 459 1da177e4SLinus Torvalds# even be read-only. 460 1da177e4SLinus Torvaldsexport MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 461 1da177e4SLinus Torvalds 462 1da177e4SLinus Torvalds# Files to ignore in find ... statements 463 1da177e4SLinus Torvalds 464 ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 465 ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 466 ae63b2d7SPrarit Bhargava -prune -o 467 450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 468 450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 469 1da177e4SLinus Torvalds 470 1da177e4SLinus Torvalds# =========================================================================== 471 1da177e4SLinus Torvalds# Rules shared between *config targets and build targets 472 1da177e4SLinus Torvalds 473 312a3d09SCao jin# Basic helpers built in scripts/basic/ 474 4f193362SPaul SmithPHONY += scripts_basic 475 1da177e4SLinus Torvaldsscripts_basic: 476 1da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 477 638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 478 1da177e4SLinus Torvalds 479 cd05e6bdSJan Beulich# To avoid any implicit rule to kick in, define an empty command. 480 cd05e6bdSJan Beulichscripts/basic/%: scripts_basic ; 481 cd05e6bdSJan Beulich 482 4f193362SPaul SmithPHONY += outputmakefile 483 fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 484 fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 485 fd5f0cd6SJan Beulich# output directory. 486 1da177e4SLinus Torvaldsoutputmakefile: 487 fd5f0cd6SJan Beulichifneq ($(KBUILD_SRC),) 488 92979997SAndi Kleen $(Q)ln -fsn $(srctree) source 489 4fd61277SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 490 fd5f0cd6SJan Beulichendif 491 1da177e4SLinus Torvalds 492 99516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 493 ae6b289aSChris Friesifneq ($(CROSS_COMPILE),) 494 238bcbc4SMasahiro YamadaCLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) 495 ef8c4ed9SStefan AgnerGCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD))) 496 238bcbc4SMasahiro YamadaCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 497 ef8c4ed9SStefan AgnerGCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 498 ae6b289aSChris Friesendif 499 ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),) 500 238bcbc4SMasahiro YamadaCLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 501 ae6b289aSChris Friesendif 502 238bcbc4SMasahiro YamadaCLANG_FLAGS += -no-integrated-as 503 238bcbc4SMasahiro YamadaKBUILD_CFLAGS += $(CLANG_FLAGS) 504 238bcbc4SMasahiro YamadaKBUILD_AFLAGS += $(CLANG_FLAGS) 505 3bd98050SJoel Stanleyexport CLANG_FLAGS 506 ae6b289aSChris Friesendif 507 ae6b289aSChris Fries 508 d5028ba8SPeter ZijlstraRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 509 2e549b2eSAndy LutomirskiRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 510 d5028ba8SPeter ZijlstraRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 511 2e549b2eSAndy LutomirskiRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 512 d5028ba8SPeter ZijlstraRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 513 2e549b2eSAndy LutomirskiRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 514 d5028ba8SPeter Zijlstraexport RETPOLINE_CFLAGS 515 2e549b2eSAndy Lutomirskiexport RETPOLINE_VDSO_CFLAGS 516 d5028ba8SPeter Zijlstra 517 8438ee76SMichal KubecekKBUILD_CFLAGS += $(call cc-option,-fno-PIE) 518 8438ee76SMichal KubecekKBUILD_AFLAGS += $(call cc-option,-fno-PIE) 519 8438ee76SMichal Kubecek 520 e501ce95SPeter Zijlstra# check for 'asm goto' 521 e08d6de4SMasahiro Yamadaifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) 522 e501ce95SPeter Zijlstra CC_HAVE_ASM_GOTO := 1 523 e501ce95SPeter Zijlstra KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 524 e501ce95SPeter Zijlstra KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO 525 e501ce95SPeter Zijlstraendif 526 e501ce95SPeter Zijlstra 527 315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 528 315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 529 315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 530 315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade. 531 315bab4eSMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) 532 315bab4eSMasahiro Yamada 533 1da177e4SLinus Torvaldsifeq ($(config-targets),1) 534 1da177e4SLinus Torvalds# =========================================================================== 535 1da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 536 1da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 537 1da177e4SLinus Torvalds 538 1da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 539 1da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 540 1da177e4SLinus Torvalds# used for 'make defconfig' 541 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 542 315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 543 1da177e4SLinus Torvalds 544 31110ebbSSam Ravnborgconfig: scripts_basic outputmakefile FORCE 545 31110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 546 31110ebbSSam Ravnborg 547 31110ebbSSam Ravnborg%config: scripts_basic outputmakefile FORCE 548 1da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 549 1da177e4SLinus Torvalds 550 1da177e4SLinus Torvaldselse 551 1da177e4SLinus Torvalds# =========================================================================== 552 1da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 553 1da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 554 1da177e4SLinus Torvalds 555 2c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 556 2c1f4f12SMasahiro Yamada# but instead _all depend on modules 557 2c1f4f12SMasahiro YamadaPHONY += all 558 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 559 2c1f4f12SMasahiro Yamada_all: all 560 2c1f4f12SMasahiro Yamadaelse 561 2c1f4f12SMasahiro Yamada_all: modules 562 2c1f4f12SMasahiro Yamadaendif 563 2c1f4f12SMasahiro Yamada 564 2c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 565 2c1f4f12SMasahiro Yamada# Normally, just do built-in. 566 2c1f4f12SMasahiro Yamada 567 2c1f4f12SMasahiro YamadaKBUILD_MODULES := 568 2c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 569 2c1f4f12SMasahiro Yamada 570 2c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 571 2c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider 572 2c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to 573 2c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them. 574 2c1f4f12SMasahiro Yamada 575 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 576 2c1f4f12SMasahiro Yamada KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 577 2c1f4f12SMasahiro Yamadaendif 578 2c1f4f12SMasahiro Yamada 579 2c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 580 2c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 581 2c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 582 2c1f4f12SMasahiro Yamada 583 2c1f4f12SMasahiro Yamadaifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 584 2c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 585 2c1f4f12SMasahiro Yamadaendif 586 2c1f4f12SMasahiro Yamada 587 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 588 2c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 589 2c1f4f12SMasahiro Yamadaendif 590 2c1f4f12SMasahiro Yamada 591 2c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 592 2c1f4f12SMasahiro Yamada 593 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 594 1da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 595 1da177e4SLinus Torvaldsinit-y := init/ 596 df85b2d7SMarkus Trippelsdorfdrivers-y := drivers/ sound/ firmware/ 597 1da177e4SLinus Torvaldsnet-y := net/ 598 1da177e4SLinus Torvaldslibs-y := lib/ 599 1da177e4SLinus Torvaldscore-y := usr/ 600 37d9fe47SFeng Wuvirt-y := virt/ 601 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 602 1da177e4SLinus Torvalds 603 1da177e4SLinus Torvaldsifeq ($(dot-config),1) 604 0a16d2e8SMasahiro Yamadainclude include/config/auto.conf 605 315bab4eSMasahiro Yamadaendif 606 1da177e4SLinus Torvalds 607 315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 608 315bab4eSMasahiro Yamada# command line. 609 315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 610 315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 611 315bab4eSMasahiro Yamadaall: vmlinux 612 315bab4eSMasahiro Yamada 613 315bab4eSMasahiro YamadaCFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 614 315bab4eSMasahiro Yamada $(call cc-option,-fno-tree-loop-im) \ 615 315bab4eSMasahiro Yamada $(call cc-disable-warning,maybe-uninitialized,) 616 5aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 617 315bab4eSMasahiro Yamada 618 b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 619 b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 620 b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 621 b1f4ff74SPaulo Zanoniendif 622 b1f4ff74SPaulo Zanoni 623 315bab4eSMasahiro Yamada# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 624 315bab4eSMasahiro Yamada# values of the respective KBUILD_* variables 625 315bab4eSMasahiro YamadaARCH_CPPFLAGS := 626 315bab4eSMasahiro YamadaARCH_AFLAGS := 627 315bab4eSMasahiro YamadaARCH_CFLAGS := 628 315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 629 315bab4eSMasahiro Yamada 630 315bab4eSMasahiro Yamadaifeq ($(dot-config),1) 631 d7942413SMasahiro Yamadaifeq ($(may-sync-config),1) 632 315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 633 315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 634 315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 635 c955ccafSRoman Zippel-include include/config/auto.conf.cmd 636 1da177e4SLinus Torvalds 637 1da177e4SLinus Torvalds# To avoid any implicit rule to kick in, define an empty command 638 14cdd3c4SRoman Zippel$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 639 1da177e4SLinus Torvalds 640 61277981SUlf Magnusson# The actual configuration files used during the build are stored in 641 61277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 642 61277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 643 bc081dd6SMichal Marekinclude/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 644 911a91c3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 645 1da177e4SLinus Torvaldselse 646 d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 647 d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 648 d7942413SMasahiro Yamada# Use auto.conf to trigger the test 649 9ee4e336SSam RavnborgPHONY += include/config/auto.conf 650 9ee4e336SSam Ravnborg 651 9ee4e336SSam Ravnborginclude/config/auto.conf: 652 264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 653 5369f550SMichal Marek echo >&2; \ 654 5369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 655 5369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 656 5369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 657 5369f550SMichal Marek echo >&2 ; \ 658 9ee4e336SSam Ravnborg /bin/false) 659 9ee4e336SSam Ravnborg 660 d7942413SMasahiro Yamadaendif # may-sync-config 661 9ee4e336SSam Ravnborgendif # $(dot-config) 662 1da177e4SLinus Torvalds 663 a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 664 ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 665 bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 666 bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 667 bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) 668 a1c48bb1SGeert Uytterhoeven 669 1da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 670 6748cb3cSBehan WebsterKBUILD_CFLAGS += $(call cc-option,-Oz,-Os) 671 6748cb3cSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) 672 1da177e4SLinus Torvaldselse 673 815eb71eSArnd Bergmannifdef CONFIG_PROFILE_ALL_BRANCHES 674 a76bcf55SArnd BergmannKBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) 675 815eb71eSArnd Bergmannelse 676 a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 677 1da177e4SLinus Torvaldsendif 678 815eb71eSArnd Bergmannendif 679 1da177e4SLinus Torvalds 680 a76bcf55SArnd BergmannKBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ 681 a76bcf55SArnd Bergmann $(call cc-disable-warning,maybe-uninitialized,)) 682 a76bcf55SArnd Bergmann 683 69102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 684 69102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 685 69102311SJiri Kosina 686 d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov 687 6b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins 688 6b90bd4bSEmese Revfy 689 1873e870SAndi Kleenifdef CONFIG_READABLE_ASM 690 1873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 691 1873e870SAndi Kleen# reorder blocks reorders the control in the function 692 1873e870SAndi Kleen# ipa clone creates specialized cloned functions 693 1873e870SAndi Kleen# partial inlining inlines only parts of functions 694 1873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 695 1873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 696 1873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 697 1873e870SAndi Kleenendif 698 1873e870SAndi Kleen 699 08f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 700 35bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 701 35bb5b1eSAndi Kleenendif 702 35bb5b1eSAndi Kleen 703 2a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 704 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 705 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 706 2a61f474SMasahiro Yamada 707 2a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 708 e06b8b98SSam Ravnborg 709 076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 710 cfe17c9bSMasahiro YamadaKBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 711 cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 712 cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, gnu) 713 cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 714 cfe17c9bSMasahiro Yamada# Quiet clang warning: comparison of unsigned expression < 0 is always false 715 cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 716 cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 717 cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names. 718 cfe17c9bSMasahiro Yamada# See modpost pattern 2 719 cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 720 cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 721 cfe17c9bSMasahiro Yamadaelse 722 cfe17c9bSMasahiro Yamada 723 cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build. 724 cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 725 9df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable 726 cfe17c9bSMasahiro Yamadaendif 727 cfe17c9bSMasahiro Yamada 728 0a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 729 1da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 730 a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 731 1da177e4SLinus Torvaldselse 732 7e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 733 7e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 734 7e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 735 7e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 736 7e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 737 7e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 738 a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 739 1da177e4SLinus Torvaldsendif 740 7e9501fdSRabin Vincentendif 741 1da177e4SLinus Torvalds 742 2062afb4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 743 2062afb4SLinus Torvalds 744 1da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 745 866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 746 866ced95SAndi KleenKBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 747 866ced95SAndi Kleenelse 748 a0f97e06SSam RavnborgKBUILD_CFLAGS += -g 749 866ced95SAndi Kleenendif 750 2288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 751 1da177e4SLinus Torvaldsendif 752 bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 753 bfaf2dd3SAndi KleenKBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 754 bfaf2dd3SAndi Kleenendif 755 1da177e4SLinus Torvalds 756 d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 757 e82c4bb8SAndi KleenKBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 758 e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 759 d6f4ceb7SAndi Kleenendif 760 d6f4ceb7SAndi Kleen 761 606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 762 07d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD 763 07d04081SVasily Gorbik # gcc 5 supports generating the mcount tables directly 764 07d04081SVasily Gorbik ifeq ($(call cc-option-yn,-mrecord-mcount),y) 765 07d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 766 07d04081SVasily Gorbik export CC_USING_RECORD_MCOUNT := 1 767 a2546faeSSteven Rostedt endif 768 2f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 769 2f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 770 2f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 771 2f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 772 2f4df001SVasily Gorbik endif 773 2f4df001SVasily Gorbik endif 774 07d04081SVasily Gorbikendif 775 a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 776 f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 777 f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 778 f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 779 a2546faeSSteven Rostedt endif 780 f28bc3c3SVasily Gorbikendif 781 f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 782 f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 783 f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 784 72441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 785 cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 786 72441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 787 72441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 788 72441cb1SSteven Rostedt endif 789 72441cb1SSteven Rostedtendif 790 16444a8aSArnaldo Carvalho de Meloendif 791 16444a8aSArnaldo Carvalho de Melo 792 91341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 793 91341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 794 91341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 795 91341d4bSSam Ravnborgendif 796 91341d4bSSam Ravnborg 797 90ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 798 e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 799 e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 800 90ad4052SMasahiro Yamadaendif 801 90ad4052SMasahiro Yamada 802 e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 803 e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 804 e8e69931SSam Ravnborg 805 1da177e4SLinus Torvalds# warn about C99 declaration after statement 806 a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 807 1da177e4SLinus Torvalds 808 0bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 809 0bb95f80SKees CookKBUILD_CFLAGS += $(call cc-option,-Wvla) 810 0bb95f80SKees Cook 811 070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 812 fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 813 1da177e4SLinus Torvalds 814 217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 815 217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 816 217c3e01SStephen Rothwell 817 fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 818 a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 819 d0115552SLinus Torvalds 820 87e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this 821 87e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we 822 87e0d4f0SDaniel Borkmann# need to disable it here generally. 823 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 824 87e0d4f0SDaniel Borkmann 825 87e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine 826 87e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled. 827 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 828 87e0d4f0SDaniel Borkmann 829 3ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 830 3ce120b1SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 831 3ce120b1SLinus Torvalds 832 8f7f5c9fSAndi Kleen# conserve stack if available 833 8f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 834 8f7f5c9fSAndi Kleen 835 80970472SSergei Trofimovich# disallow errors like 'EXPORT_GPL(foo);' with missing header 836 80970472SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 837 80970472SSergei Trofimovich 838 80970472SSergei Trofimovich# require functions to have arguments in prototypes, not empty 'int foo()' 839 80970472SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 840 80970472SSergei Trofimovich 841 fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 842 fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 843 fe7c36c7SJosh Triplett 844 ea8daa7bSDaniel Wagner# enforce correct pointer usage 845 ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 846 ea8daa7bSDaniel Wagner 847 c834f0e8SKees Cook# Require designated initializers for all marked structures 848 c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 849 c834f0e8SKees Cook 850 a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 851 a73619a8SMasahiro YamadaKBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 852 a73619a8SMasahiro Yamada 853 40df759eSMichal Marek# use the deterministic mode of AR if available 854 40df759eSMichal MarekKBUILD_ARFLAGS := $(call ar-option,D) 855 40df759eSMichal Marek 856 a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan 857 a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn 858 c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan 859 a86fe353SMasahiro Yamada 860 61754c18SMichal Marek# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 861 61754c18SMichal Marek# last assignments 862 61754c18SMichal MarekKBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 863 61754c18SMichal MarekKBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 864 61754c18SMichal MarekKBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 865 52bcc330SSam Ravnborg 866 18991197SRoland McGrath# Use --build-id when available. 867 0da4fabdSMasahiro YamadaLDFLAGS_BUILD_ID := $(call ld-option, --build-id) 868 6588169dSSam RavnborgKBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 869 18991197SRoland McGrathLDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 870 18991197SRoland McGrath 871 5d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 872 d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 873 5d7d18f5SDavid Howellsendif 874 5d7d18f5SDavid Howells 875 14516765SLuc Van Oostenryck# insure the checker run with the right endianness 876 14516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 877 14516765SLuc Van Oostenryck 878 1f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 879 1f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 880 1f2f01b1SLuc Van Oostenryck 881 1da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 882 1da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 883 1da177e4SLinus Torvalds# set in the environment 884 1da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 885 1da177e4SLinus Torvalds# this default value 886 1da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 887 1da177e4SLinus Torvalds 888 1da177e4SLinus Torvalds# 889 1da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 890 1da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 891 1da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 892 1da177e4SLinus Torvalds 893 1da177e4SLinus Torvalds# 894 f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 895 f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 896 f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 897 f4d4ffc0SJason Cooper# 898 f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 899 f4d4ffc0SJason Cooper 900 f4d4ffc0SJason Cooper# 901 1da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 902 1da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 903 070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 904 1da177e4SLinus Torvalds# 905 1da177e4SLinus Torvalds 906 df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 907 1da177e4SLinus Torvaldsexport MODLIB 908 1da177e4SLinus Torvalds 909 ac031f26STheodore Ts'o# 910 2ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 911 2ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 912 2ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 913 177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 914 2ea03891SSam Ravnborg 915 ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 916 ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 917 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 918 ac031f26STheodore Ts'oelse 919 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 920 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 921 ac031f26STheodore Ts'oelse 922 2ea03891SSam Ravnborgmod_strip_cmd = true 923 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 924 ac031f26STheodore Ts'oexport mod_strip_cmd 925 ac031f26STheodore Ts'o 926 beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 927 beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 928 beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ. 929 beb50df3SBertrand Jacquin 930 beb50df3SBertrand Jacquinmod_compress_cmd = true 931 beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS 932 beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_GZIP 933 3d1450d5SJason A. Donenfeld mod_compress_cmd = gzip -n -f 934 beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_GZIP 935 beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_XZ 936 3d1450d5SJason A. Donenfeld mod_compress_cmd = xz -f 937 beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_XZ 938 beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS 939 beb50df3SBertrand Jacquinexport mod_compress_cmd 940 beb50df3SBertrand Jacquin 941 1bf49dd4SP J P# Select initial ramdisk compression format, default is gzip(1). 942 1bf49dd4SP J P# This shall be used by the dracut(8) tool while creating an initramfs image. 943 1bf49dd4SP J P# 944 7ac18156SJan BeulichINITRD_COMPRESS-y := gzip 945 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 946 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 947 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 948 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 949 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 950 b7000adeSLinus Torvalds# do not export INITRD_COMPRESS, since we didn't actually 951 b7000adeSLinus Torvalds# choose a sane default compression above. 952 b7000adeSLinus Torvalds# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 953 1da177e4SLinus Torvalds 954 d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 955 3ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY)) 956 3ee550f1SDavid Woodhouse 957 3ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 958 e2a666d5SRusty Russellelse 959 e2a666d5SRusty Russellmod_sign_cmd = true 960 e2a666d5SRusty Russellendif 961 e2a666d5SRusty Russellexport mod_sign_cmd 962 e2a666d5SRusty Russell 963 9f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION 964 9f0c18aeSJosh Poimboeuf has_libelf := $(call try-run,\ 965 9f0c18aeSJosh Poimboeuf echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) 966 9f0c18aeSJosh Poimboeuf ifeq ($(has_libelf),1) 967 9f0c18aeSJosh Poimboeuf objtool_target := tools/objtool FORCE 968 9f0c18aeSJosh Poimboeuf else 969 11af8474SJosh Poimboeuf ifdef CONFIG_UNWINDER_ORC 970 11af8474SJosh Poimboeuf $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") 971 3dd40cb3SJosh Poimboeuf else 972 3dd40cb3SJosh Poimboeuf $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") 973 3dd40cb3SJosh Poimboeuf endif 974 9f0c18aeSJosh Poimboeuf SKIP_STACK_VALIDATION := 1 975 9f0c18aeSJosh Poimboeuf export SKIP_STACK_VALIDATION 976 9f0c18aeSJosh Poimboeuf endif 977 9f0c18aeSJosh Poimboeufendif 978 9f0c18aeSJosh Poimboeuf 979 e2a666d5SRusty Russell 980 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 981 cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 982 1da177e4SLinus Torvalds 983 1da177e4SLinus Torvaldsvmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 984 1da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 985 37d9fe47SFeng Wu $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 986 1da177e4SLinus Torvalds 987 1da177e4SLinus Torvaldsvmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 988 37d9fe47SFeng Wu $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) 989 1da177e4SLinus Torvalds 990 f49821eeSNicholas Piggininit-y := $(patsubst %/, %/built-in.a, $(init-y)) 991 f49821eeSNicholas Piggincore-y := $(patsubst %/, %/built-in.a, $(core-y)) 992 f49821eeSNicholas Piggindrivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 993 f49821eeSNicholas Pigginnet-y := $(patsubst %/, %/built-in.a, $(net-y)) 994 1da177e4SLinus Torvaldslibs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 995 f49821eeSNicholas Pigginlibs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 996 f49821eeSNicholas Pigginvirt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 997 1da177e4SLinus Torvalds 998 1f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 999 95698570SSam Ravnborgexport KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 1000 3a166fc2SNicholas Pigginexport KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y) 1001 3a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1) 1002 95698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1003 1f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 1004 312a3d09SCao jin# used by scripts/package/Makefile 1005 37d9fe47SFeng Wuexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) 1006 1da177e4SLinus Torvalds 1007 3a166fc2SNicholas Pigginvmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS) 1008 1da177e4SLinus Torvalds 1009 3fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 1010 3fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 1011 3fdc7d3fSMasahiro Yamadaautoksyms_recursive: $(vmlinux-deps) 1012 2441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 1013 ba79d401SNicolas Ferre $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1014 86556392SNicolas Pitre "$(MAKE) -f $(srctree)/Makefile vmlinux" 1015 2441e78bSNicolas Pitreendif 1016 23121ca2SNicolas Pitre 1017 1f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 1018 1f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 1019 1f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 1020 1f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS 1021 1f50b80aSMasahiro Yamada KBUILD_MODULES := 1 1022 1f50b80aSMasahiro Yamadaendif 1023 1f50b80aSMasahiro Yamada 1024 07a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1025 07a422bbSMasahiro Yamada 1026 07a422bbSMasahiro Yamada$(autoksyms_h): 1027 07a422bbSMasahiro Yamada $(Q)mkdir -p $(dir $@) 1028 07a422bbSMasahiro Yamada $(Q)touch $@ 1029 23121ca2SNicolas Pitre 1030 fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1031 fbe6e37dSNicholas Piggin 1032 fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1033 fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 1034 d503ac53SMasahiro Yamada $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1035 fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1036 2441e78bSNicolas Pitre 1037 3fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1038 3fdc7d3fSMasahiro Yamadaifdef CONFIG_HEADERS_CHECK 1039 3fdc7d3fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 1040 3fdc7d3fSMasahiro Yamadaendif 1041 3fdc7d3fSMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 1042 3fdc7d3fSMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1043 3fdc7d3fSMasahiro Yamadaendif 1044 1f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 1045 741f98feSSam Ravnborg 1046 3fca1700SMasahiro Yamada# Build samples along the rest of the kernel. This needs headers_install. 1047 dd92478aSNicolas Pitreifdef CONFIG_SAMPLES 1048 dd92478aSNicolas Pitrevmlinux-dirs += samples 1049 3fca1700SMasahiro Yamadasamples: headers_install 1050 dd92478aSNicolas Pitreendif 1051 dd92478aSNicolas Pitre 1052 1da177e4SLinus Torvalds# The actual objects are generated when descending, 1053 1da177e4SLinus Torvalds# make sure no implicit rule kicks in 1054 1f2bfbd0SSam Ravnborg$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 1055 1da177e4SLinus Torvalds 1056 1da177e4SLinus Torvalds# Handle descending into subdirectories listed in $(vmlinux-dirs) 1057 1da177e4SLinus Torvalds# Preset locale variables to speed up the build process. Limit locale 1058 1da177e4SLinus Torvalds# tweaks to this spot to avoid wrong language settings when running 1059 1da177e4SLinus Torvalds# make menuconfig etc. 1060 1da177e4SLinus Torvalds# Error messages still appears in the original language 1061 1da177e4SLinus Torvalds 1062 4f193362SPaul SmithPHONY += $(vmlinux-dirs) 1063 5bb78269SSam Ravnborg$(vmlinux-dirs): prepare scripts 1064 f7adc312SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ need-builtin=1 1065 1da177e4SLinus Torvalds 1066 0d0e7718SMichal Marekdefine filechk_kernel.release 1067 0d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1068 0d0e7718SMichal Marekendef 1069 0d0e7718SMichal Marek 1070 83a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 1071 2063945fSMasahiro Yamadainclude/config/kernel.release: $(srctree)/Makefile FORCE 1072 0d0e7718SMichal Marek $(call filechk,kernel.release) 1073 cb58455cSSam Ravnborg 1074 d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1075 d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1076 d8821622SMasahiro Yamada# in parallel 1077 d8821622SMasahiro YamadaPHONY += scripts 1078 37c8a5faSRob Herringscripts: scripts_basic scripts_dtc asm-generic gcc-plugins $(autoksyms_h) 1079 d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1080 cb58455cSSam Ravnborg 1081 1da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 1082 5bb78269SSam Ravnborg# or the modules are listed in "prepare". 1083 5bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 1084 5bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 1085 5bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 1086 1da177e4SLinus Torvalds 1087 5bb78269SSam Ravnborg# Listed in dependency order 1088 77b0bf55SNadav AmitPHONY += prepare archprepare macroprepare prepare0 prepare1 prepare2 prepare3 1089 5bb78269SSam Ravnborg 1090 86feeaa8SSam Ravnborg# prepare3 is used to check if we are building in a separate output directory, 1091 1da177e4SLinus Torvalds# and if so do: 1092 1da177e4SLinus Torvalds# 1) Check that make has not been executed in the kernel src $(srctree) 1093 f1d28fb0SRoman Zippelprepare3: include/config/kernel.release 1094 1da177e4SLinus Torvaldsifneq ($(KBUILD_SRC),) 1095 fd54f502SMike Frysinger @$(kecho) ' Using $(srctree) as source for kernel' 1096 c955ccafSRoman Zippel $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 1097 5369f550SMichal Marek echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1098 5369f550SMichal Marek echo >&2 " in the '$(srctree)' directory.";\ 1099 1da177e4SLinus Torvalds /bin/false; \ 1100 1da177e4SLinus Torvalds fi; 1101 1da177e4SLinus Torvaldsendif 1102 1da177e4SLinus Torvalds 1103 c965b105SKees Cook# prepare2 creates a makefile if using a separate output directory. 1104 c965b105SKees Cook# From this point forward, .config has been reprocessed, so any rules 1105 c965b105SKees Cook# that need to depend on updated CONFIG_* values can be checked here. 1106 2a61f474SMasahiro Yamadaprepare2: prepare3 outputmakefile asm-generic 1107 1da177e4SLinus Torvalds 1108 2063945fSMasahiro Yamadaprepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h 1109 7bb9d092SSam Ravnborg $(cmd_crmodverdir) 1110 1da177e4SLinus Torvalds 1111 77b0bf55SNadav Amitmacroprepare: prepare1 archmacros 1112 77b0bf55SNadav Amit 1113 77b0bf55SNadav Amitarchprepare: archheaders archscripts macroprepare scripts_basic 1114 5bb78269SSam Ravnborg 1115 6b90bd4bSEmese Revfyprepare0: archprepare gcc-plugins 1116 8d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 1117 86feeaa8SSam Ravnborg 1118 1da177e4SLinus Torvalds# All the preparing.. 1119 b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool 1120 b9ab5ebbSJosh Poimboeuf 1121 2c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 1122 2c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 1123 2c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1124 2c1f4f12SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 1125 2c1f4f12SMasahiro Yamada src=asm obj=arch/$(SRCARCH)/include/generated/asm 1126 2c1f4f12SMasahiro Yamadauapi-asm-generic: 1127 2c1f4f12SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 1128 2c1f4f12SMasahiro Yamada src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 1129 2c1f4f12SMasahiro Yamada 1130 b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool 1131 3b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 1132 1da177e4SLinus Torvalds 1133 1da177e4SLinus Torvalds# Generate some files 1134 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1135 1da177e4SLinus Torvalds 1136 1da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 1137 1da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 1138 1da177e4SLinus Torvalds 1139 1da177e4SLinus Torvaldsuts_len := 64 1140 63104eecSSam Ravnborgdefine filechk_utsrelease.h 1141 1da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1142 1da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1143 1da177e4SLinus Torvalds exit 1; \ 1144 1da177e4SLinus Torvalds fi; \ 1145 63104eecSSam Ravnborg (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1146 1da177e4SLinus Torvaldsendef 1147 1da177e4SLinus Torvalds 1148 63104eecSSam Ravnborgdefine filechk_version.h 1149 63104eecSSam Ravnborg (echo \#define LINUX_VERSION_CODE $(shell \ 1150 78d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1151 63104eecSSam Ravnborg echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1152 63104eecSSam Ravnborgendef 1153 63104eecSSam Ravnborg 1154 43fee2b2SMasahiro Yamada$(version_h): FORCE 1155 1da177e4SLinus Torvalds $(call filechk,version.h) 1156 223c24a7SMichal Marek $(Q)rm -f $(old_version_h) 1157 1da177e4SLinus Torvalds 1158 273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 1159 63104eecSSam Ravnborg $(call filechk,utsrelease.h) 1160 63104eecSSam Ravnborg 1161 179efcb4SVegard NossumPHONY += headerdep 1162 179efcb4SVegard Nossumheaderdep: 1163 9663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1164 9663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1165 179efcb4SVegard Nossum 1166 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1167 8d730cfbSDavid Woodhouse# Kernel headers 1168 8d730cfbSDavid Woodhouse 1169 e6883b18SSam Ravnborg#Default location for installed headers 1170 e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1171 e6883b18SSam Ravnborg 1172 9d022c54SMasahiro Yamada# If we do an all arch process set dst to include/arch-$(SRCARCH) 1173 9d022c54SMasahiro Yamadahdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) 1174 e6883b18SSam Ravnborg 1175 052ad274SH. Peter AnvinPHONY += archheaders 1176 052ad274SH. Peter Anvinarchheaders: 1177 052ad274SH. Peter Anvin 1178 6520fe55SH. Peter AnvinPHONY += archscripts 1179 6520fe55SH. Peter Anvinarchscripts: 1180 6520fe55SH. Peter Anvin 1181 77b0bf55SNadav AmitPHONY += archmacros 1182 77b0bf55SNadav Amitarchmacros: 1183 77b0bf55SNadav Amit 1184 e6883b18SSam RavnborgPHONY += __headers 1185 a9d9a400SMasahiro Yamada__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts 1186 e1b702cfSMike Waychison $(Q)$(MAKE) $(build)=scripts build_unifdef 1187 6d716275SDavid Woodhouse 1188 6d716275SDavid WoodhousePHONY += headers_install_all 1189 2fb9b1bdSSam Ravnborgheaders_install_all: 1190 2fb9b1bdSSam Ravnborg $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1191 6d716275SDavid Woodhouse 1192 8d730cfbSDavid WoodhousePHONY += headers_install 1193 e6883b18SSam Ravnborgheaders_install: __headers 1194 9d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1195 2fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1196 a8ff49a1SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include 1197 9d022c54SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) 1198 8d730cfbSDavid Woodhouse 1199 1f85712eSMike FrysingerPHONY += headers_check_all 1200 1f85712eSMike Frysingerheaders_check_all: headers_install_all 1201 2fb9b1bdSSam Ravnborg $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1202 1f85712eSMike Frysinger 1203 68475359SDavid WoodhousePHONY += headers_check 1204 68475359SDavid Woodhouseheaders_check: headers_install 1205 a8ff49a1SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 1206 9d022c54SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 1207 68475359SDavid Woodhouse 1208 8d730cfbSDavid Woodhouse# --------------------------------------------------------------------------- 1209 5a5da78bSShuah Khan# Kernel selftest 1210 5a5da78bSShuah Khan 1211 5a5da78bSShuah KhanPHONY += kselftest 1212 5a5da78bSShuah Khankselftest: 1213 2bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1214 5a5da78bSShuah Khan 1215 801d2e9fSShuah KhanPHONY += kselftest-clean 1216 dcb825a9SWang Longkselftest-clean: 1217 2bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean 1218 dcb825a9SWang Long 1219 3d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 1220 3d6dee7aSBamvor Jian Zhangkselftest-merge: 1221 3d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1222 3d6dee7aSBamvor Jian Zhang $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1223 3d6dee7aSBamvor Jian Zhang -m $(objtree)/.config \ 1224 3d6dee7aSBamvor Jian Zhang $(srctree)/tools/testing/selftests/*/config 1225 3d6dee7aSBamvor Jian Zhang +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1226 3d6dee7aSBamvor Jian Zhang 1227 5a5da78bSShuah Khan# --------------------------------------------------------------------------- 1228 37c8a5faSRob Herring# Devicetree files 1229 37c8a5faSRob Herring 1230 37c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1231 37c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 1232 37c8a5faSRob Herringendif 1233 37c8a5faSRob Herring 1234 37c8a5faSRob Herringifneq ($(dtstree),) 1235 37c8a5faSRob Herring 1236 37c8a5faSRob Herring%.dtb: prepare3 scripts_dtc 1237 37c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1238 37c8a5faSRob Herring 1239 37c8a5faSRob HerringPHONY += dtbs dtbs_install 1240 37c8a5faSRob Herringdtbs: prepare3 scripts_dtc 1241 37c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 1242 37c8a5faSRob Herring 1243 37c8a5faSRob Herringdtbs_install: 1244 37c8a5faSRob Herring $(Q)$(MAKE) $(dtbinst)=$(dtstree) 1245 37c8a5faSRob Herring 1246 37c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 1247 37c8a5faSRob Herringall: dtbs 1248 37c8a5faSRob Herringendif 1249 37c8a5faSRob Herring 1250 37c8a5faSRob Herringendif 1251 37c8a5faSRob Herring 1252 37c8a5faSRob HerringPHONY += scripts_dtc 1253 37c8a5faSRob Herringscripts_dtc: scripts_basic 1254 37c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 1255 37c8a5faSRob Herring 1256 37c8a5faSRob Herring# --------------------------------------------------------------------------- 1257 1da177e4SLinus Torvalds# Modules 1258 1da177e4SLinus Torvalds 1259 1da177e4SLinus Torvaldsifdef CONFIG_MODULES 1260 1da177e4SLinus Torvalds 1261 1da177e4SLinus Torvalds# By default, build modules as well 1262 1da177e4SLinus Torvalds 1263 73d1393eSMichal Marekall: modules 1264 1da177e4SLinus Torvalds 1265 1da177e4SLinus Torvalds# Build modules 1266 551559e1STejun Heo# 1267 551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1268 551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1269 551559e1STejun Heo# using awk while concatenating to the final file. 1270 1da177e4SLinus Torvalds 1271 4f193362SPaul SmithPHONY += modules 1272 2da30e70SMichal Marekmodules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1273 551559e1STejun Heo $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1274 fd54f502SMike Frysinger @$(kecho) ' Building modules, stage 2.'; 1275 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1276 1da177e4SLinus Torvalds 1277 a6c36632SMichal Marekmodules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1278 a6c36632SMichal Marek $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1279 a6c36632SMichal Marek 1280 2063945fSMasahiro Yamada%/modules.builtin: include/config/auto.conf include/config/tristate.conf 1281 a6c36632SMichal Marek $(Q)$(MAKE) $(modbuiltin)=$* 1282 a6c36632SMichal Marek 1283 1da177e4SLinus Torvalds 1284 1da177e4SLinus Torvalds# Target to prepare building external modules 1285 4f193362SPaul SmithPHONY += modules_prepare 1286 5bb78269SSam Ravnborgmodules_prepare: prepare scripts 1287 1da177e4SLinus Torvalds 1288 1da177e4SLinus Torvalds# Target to install modules 1289 4f193362SPaul SmithPHONY += modules_install 1290 1da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 1291 1da177e4SLinus Torvalds 1292 4f193362SPaul SmithPHONY += _modinst_ 1293 2da30e70SMichal Marek_modinst_: 1294 1da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 1295 1da177e4SLinus Torvalds @rm -f $(MODLIB)/source 1296 1da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 1297 8e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 1298 1da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1299 1da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 1300 7e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 1301 1da177e4SLinus Torvalds fi 1302 551559e1STejun Heo @cp -f $(objtree)/modules.order $(MODLIB)/ 1303 bc081dd6SMichal Marek @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1304 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1305 1da177e4SLinus Torvalds 1306 50a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 1307 1da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 1308 1da177e4SLinus Torvalds# boot script depmod is the master version. 1309 4f193362SPaul SmithPHONY += _modinst_post 1310 6d128e1eSLinus Torvalds_modinst_post: _modinst_ 1311 50a8ec31SSam Ravnborg $(call cmd,depmod) 1312 1da177e4SLinus Torvalds 1313 d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1314 d890f510SJosh BoyerPHONY += modules_sign 1315 d890f510SJosh Boyermodules_sign: 1316 d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1317 d890f510SJosh Boyerendif 1318 d890f510SJosh Boyer 1319 1da177e4SLinus Torvaldselse # CONFIG_MODULES 1320 1da177e4SLinus Torvalds 1321 1da177e4SLinus Torvalds# Modules not configured 1322 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1323 1da177e4SLinus Torvalds 1324 612e47ceSMasahiro YamadaPHONY += modules modules_install 1325 612e47ceSMasahiro Yamadamodules modules_install: 1326 5369f550SMichal Marek @echo >&2 1327 5369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 1328 5369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 1329 5369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 1330 5369f550SMichal Marek @echo >&2 1331 1da177e4SLinus Torvalds @exit 1 1332 1da177e4SLinus Torvalds 1333 1da177e4SLinus Torvaldsendif # CONFIG_MODULES 1334 1da177e4SLinus Torvalds 1335 1da177e4SLinus Torvalds### 1336 1da177e4SLinus Torvalds# Cleaning is done on three levels. 1337 1da177e4SLinus Torvalds# make clean Delete most generated files 1338 1da177e4SLinus Torvalds# Leave enough to build external modules 1339 1da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 1340 1da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 1341 1da177e4SLinus Torvalds 1342 1da177e4SLinus Torvalds# Directories & files removed with 'make clean' 1343 fbfa9be9SMasahiro YamadaCLEAN_DIRS += $(MODVERDIR) include/ksym 1344 1da177e4SLinus Torvalds 1345 1da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 1346 d8ecc5cdSSam RavnborgMRPROPER_DIRS += include/config usr/include include/generated \ 1347 79192ca8SJason Cooper arch/*/include/generated .tmp_objdiff 1348 278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \ 1349 d5b71936SRusty Russell Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1350 fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1351 fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 1352 3ee7b3faSJan Kiszka signing_key.x509.signer vmlinux-gdb.py 1353 1da177e4SLinus Torvalds 1354 1da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 1355 1da177e4SLinus Torvalds# 1356 1da177e4SLinus Torvaldsclean: rm-dirs := $(CLEAN_DIRS) 1357 1da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 1358 fb68d4beSGerard Snitselaarclean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1359 1da177e4SLinus Torvalds 1360 bd1ee804SPawel MollPHONY += $(clean-dirs) clean archclean vmlinuxclean 1361 1da177e4SLinus Torvalds$(clean-dirs): 1362 1da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1363 1da177e4SLinus Torvalds 1364 bd1ee804SPawel Mollvmlinuxclean: 1365 bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1366 fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1367 bd1ee804SPawel Moll 1368 bd1ee804SPawel Mollclean: archclean vmlinuxclean 1369 1da177e4SLinus Torvalds 1370 1da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 1371 1da177e4SLinus Torvalds# 1372 1da177e4SLinus Torvaldsmrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1373 1da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1374 cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 1375 1da177e4SLinus Torvalds 1376 4f193362SPaul SmithPHONY += $(mrproper-dirs) mrproper archmrproper 1377 1da177e4SLinus Torvalds$(mrproper-dirs): 1378 1da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1379 1da177e4SLinus Torvalds 1380 1da177e4SLinus Torvaldsmrproper: clean archmrproper $(mrproper-dirs) 1381 1da177e4SLinus Torvalds $(call cmd,rmdirs) 1382 1da177e4SLinus Torvalds $(call cmd,rmfiles) 1383 1da177e4SLinus Torvalds 1384 1da177e4SLinus Torvalds# distclean 1385 1da177e4SLinus Torvalds# 1386 4f193362SPaul SmithPHONY += distclean 1387 1da177e4SLinus Torvalds 1388 1da177e4SLinus Torvaldsdistclean: mrproper 1389 1da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 1390 1da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1391 f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1392 f78271dfSMasahiro Yamada -o -name 'core' \) \ 1393 1da177e4SLinus Torvalds -type f -print | xargs rm -f 1394 1da177e4SLinus Torvalds 1395 1da177e4SLinus Torvalds 1396 1da177e4SLinus Torvalds# Packaging of the kernel to various formats 1397 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1398 c79624c1SMichal Marekpackage-dir := scripts/package 1399 1da177e4SLinus Torvalds 1400 bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1401 bafb6747SArnaldo Carvalho de Melo $(Q)$(MAKE) $(build)=$(package-dir) $@ 1402 031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1403 6c2133e1SSam Ravnborg $(Q)$(MAKE) $(build)=$(package-dir) $@ 1404 1da177e4SLinus Torvalds 1405 1da177e4SLinus Torvalds 1406 1da177e4SLinus Torvalds# Brief documentation of the typical targets used 1407 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1408 1da177e4SLinus Torvalds 1409 5dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1410 a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 1411 5dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1412 5dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 1413 1da177e4SLinus Torvalds 1414 fe69b420SMasahiro YamadaPHONY += help 1415 1da177e4SLinus Torvaldshelp: 1416 1da177e4SLinus Torvalds @echo 'Cleaning targets:' 1417 5ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 1418 5cc8d246SJesper Juhl @echo ' enough build support to build external modules' 1419 5ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 1420 5cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 1421 1da177e4SLinus Torvalds @echo '' 1422 1da177e4SLinus Torvalds @echo 'Configuration targets:' 1423 1da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1424 1da177e4SLinus Torvalds @echo '' 1425 1da177e4SLinus Torvalds @echo 'Other generic targets:' 1426 1da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 1427 1da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 1428 1da177e4SLinus Torvalds @echo '* modules - Build all modules' 1429 9cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1430 1da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 1431 40ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1432 433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1433 433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 1434 62718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1435 62718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1436 155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1437 c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 1438 1da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 1439 1da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1440 f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 1441 3f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 1442 3f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1443 3f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 1444 2fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1445 59df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 1446 2fb9b1bdSSam Ravnborg echo '' 1447 31b8cc80SRandy Dunlap @echo 'Static analysers:' 1448 1da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1449 1da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1450 aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1451 ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1452 295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 1453 179efcb4SVegard Nossum @echo ' headers_check - Sanity check on exported headers' 1454 74425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 1455 7f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 1456 74425eeeSNicolas Palix @echo '' 1457 31b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1458 5a5da78bSShuah Khan @echo ' kselftest - Build and run kernel selftest (run as root)' 1459 5a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 1460 5a5da78bSShuah Khan @echo ' running kselftest on it' 1461 dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1462 bbfe63b6SRandy Dunlap @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1463 3d6dee7aSBamvor Jian Zhang @echo ' .config.' 1464 5a5da78bSShuah Khan @echo '' 1465 37c8a5faSRob Herring @$(if $(dtstree), \ 1466 37c8a5faSRob Herring echo 'Devicetree:'; \ 1467 37c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 1468 37c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1469 37c8a5faSRob Herring echo '') 1470 37c8a5faSRob Herring 1471 31b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 1472 31b8cc80SRandy Dunlap @echo ' use "make tools/help"' 1473 31b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 1474 31b8cc80SRandy Dunlap @echo '' 1475 1da177e4SLinus Torvalds @echo 'Kernel packaging:' 1476 6c2133e1SSam Ravnborg @$(MAKE) $(build)=$(package-dir) help 1477 1da177e4SLinus Torvalds @echo '' 1478 1da177e4SLinus Torvalds @echo 'Documentation targets:' 1479 cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1480 1da177e4SLinus Torvalds @echo '' 1481 01dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 1482 1da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 1483 01dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 1484 1da177e4SLinus Torvalds @echo '' 1485 1da177e4SLinus Torvalds @$(if $(boards), \ 1486 1da177e4SLinus Torvalds $(foreach b, $(boards), \ 1487 1da177e4SLinus Torvalds printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1488 1da177e4SLinus Torvalds echo '') 1489 5dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 1490 5dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 1491 5dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1492 5dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 1493 5dffbe81SSegher Boessenkool echo '') 1494 1da177e4SLinus Torvalds 1495 1da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1496 45d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1497 1da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1498 9ba26a72SCao jin @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' 1499 701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1500 af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1501 28bc20dcSSam Ravnborg @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1502 28bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 1503 28bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 1504 28bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1505 a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 1506 1da177e4SLinus Torvalds @echo '' 1507 1da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1508 1da177e4SLinus Torvalds @echo 'For further info see the ./README file' 1509 1da177e4SLinus Torvalds 1510 1da177e4SLinus Torvalds 1511 5dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 1512 5dffbe81SSegher Boessenkool 1513 5dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 1514 5dffbe81SSegher Boessenkool 1515 fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1516 5dffbe81SSegher Boessenkool 1517 5dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 1518 5dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 1519 5dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 1520 5dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 1521 5dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1522 5dffbe81SSegher Boessenkool echo '') 1523 5dffbe81SSegher Boessenkool 1524 5dffbe81SSegher Boessenkool 1525 1da177e4SLinus Torvalds# Documentation targets 1526 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1527 e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1528 e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 1529 22cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1530 22cba31bSJani Nikula$(DOC_TARGETS): scripts_basic FORCE 1531 cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 1532 1da177e4SLinus Torvalds 1533 1da177e4SLinus Torvaldselse # KBUILD_EXTMOD 1534 1da177e4SLinus Torvalds 1535 1da177e4SLinus Torvalds### 1536 1da177e4SLinus Torvalds# External module support. 1537 1da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 1538 1da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 1539 1da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 1540 1da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 1541 1da177e4SLinus Torvalds# be used. 1542 1da177e4SLinus Torvalds# 1543 1da177e4SLinus Torvalds# The following are the only valid targets when building external 1544 1da177e4SLinus Torvalds# modules. 1545 1da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 1546 1da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 1547 1da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 1548 1da177e4SLinus Torvalds# make M=dir modules_install 1549 070b98bfSSam Ravnborg# Install the modules built in the module directory 1550 1da177e4SLinus Torvalds# Assumes install directory is already created 1551 1da177e4SLinus Torvalds 1552 1da177e4SLinus Torvalds# We are always building modules 1553 1da177e4SLinus TorvaldsKBUILD_MODULES := 1 1554 1da177e4SLinus Torvalds 1555 4f193362SPaul SmithPHONY += $(objtree)/Module.symvers 1556 1da177e4SLinus Torvalds$(objtree)/Module.symvers: 1557 1da177e4SLinus Torvalds @test -e $(objtree)/Module.symvers || ( \ 1558 1da177e4SLinus Torvalds echo; \ 1559 1da177e4SLinus Torvalds echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1560 1da177e4SLinus Torvalds echo " is missing; modules will have no dependencies and modversions."; \ 1561 1da177e4SLinus Torvalds echo ) 1562 1da177e4SLinus Torvalds 1563 1da177e4SLinus Torvaldsmodule-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1564 4f193362SPaul SmithPHONY += $(module-dirs) modules 1565 *e07db28eSMasahiro Yamada$(module-dirs): prepare $(objtree)/Module.symvers 1566 1da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1567 1da177e4SLinus Torvalds 1568 1da177e4SLinus Torvaldsmodules: $(module-dirs) 1569 fd54f502SMike Frysinger @$(kecho) ' Building modules, stage 2.'; 1570 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1571 1da177e4SLinus Torvalds 1572 4f193362SPaul SmithPHONY += modules_install 1573 a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1574 a67dc21aSSam Ravnborg 1575 a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1576 4f193362SPaul SmithPHONY += _emodinst_ 1577 a67dc21aSSam Ravnborg_emodinst_: 1578 a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1579 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1580 1da177e4SLinus Torvalds 1581 4f193362SPaul SmithPHONY += _emodinst_post 1582 a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1583 a67dc21aSSam Ravnborg $(call cmd,depmod) 1584 a67dc21aSSam Ravnborg 1585 1da177e4SLinus Torvaldsclean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1586 1da177e4SLinus Torvalds 1587 4f193362SPaul SmithPHONY += $(clean-dirs) clean 1588 1da177e4SLinus Torvalds$(clean-dirs): 1589 1da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1590 1da177e4SLinus Torvalds 1591 1da177e4SLinus Torvaldsclean: rm-dirs := $(MODVERDIR) 1592 88d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1593 1da177e4SLinus Torvalds 1594 fe69b420SMasahiro YamadaPHONY += help 1595 1da177e4SLinus Torvaldshelp: 1596 1da177e4SLinus Torvalds @echo ' Building external modules.' 1597 1da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1598 1da177e4SLinus Torvalds @echo '' 1599 1da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 1600 1da177e4SLinus Torvalds @echo ' modules_install - install the module' 1601 1da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 1602 1da177e4SLinus Torvalds @echo '' 1603 06300b21SSam Ravnborg 1604 06300b21SSam Ravnborg# Dummies... 1605 4f193362SPaul SmithPHONY += prepare scripts 1606 *e07db28eSMasahiro Yamadaprepare: 1607 *e07db28eSMasahiro Yamada $(cmd_crmodverdir) 1608 06300b21SSam Ravnborgscripts: ; 1609 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 1610 1da177e4SLinus Torvalds 1611 88d7be03SMichal Marekclean: $(clean-dirs) 1612 88d7be03SMichal Marek $(call cmd,rmdirs) 1613 88d7be03SMichal Marek $(call cmd,rmfiles) 1614 43f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1615 ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1616 74ce1896SMasahiro Yamada -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \ 1617 ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 1618 d523b255SRasmus Villemoes -o -name '*.su' \ 1619 88d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1620 9a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1621 4fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 1622 88d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 1623 88d7be03SMichal Marek -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1624 6b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1625 433db3e2SVinÃcius Tinti -o -name '*.ll' \ 1626 88d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 1627 88d7be03SMichal Marek 1628 1da177e4SLinus Torvalds# Generate tags for editors 1629 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1630 a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1631 a680eedcSSam Ravnborg cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1632 1da177e4SLinus Torvalds 1633 f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 1634 1da177e4SLinus Torvalds $(call cmd,tags) 1635 1da177e4SLinus Torvalds 1636 1da177e4SLinus Torvalds# Scripts to check various things for consistency 1637 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1638 1da177e4SLinus Torvalds 1639 279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1640 279f3dd3SPeter Foley 1641 1da177e4SLinus Torvaldsincludecheck: 1642 436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 1643 1da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 1644 80007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1645 1da177e4SLinus Torvalds 1646 1da177e4SLinus Torvaldsversioncheck: 1647 2ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 1648 1da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 1649 80007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1650 1da177e4SLinus Torvalds 1651 74425eeeSNicolas Palixcoccicheck: 1652 74425eeeSNicolas Palix $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1653 74425eeeSNicolas Palix 1654 1da177e4SLinus Torvaldsnamespacecheck: 1655 1da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 1656 1da177e4SLinus Torvalds 1657 295ac051SAdrian Bunkexport_report: 1658 295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1659 295ac051SAdrian Bunk 1660 c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1661 e3ccf6e3SJeff Dike 1662 011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1663 011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1664 011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1665 011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1666 011e3a9aSJeff Dikeifeq ($(ARCH), um) 1667 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1668 011e3a9aSJeff Dikeelse 1669 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1670 011e3a9aSJeff Dikeendif 1671 1da177e4SLinus Torvaldscheckstack: 1672 1da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1673 011e3a9aSJeff Dike $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1674 1da177e4SLinus Torvalds 1675 7b8ea53dSAmerigo Wangkernelrelease: 1676 7b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1677 01ab1788SAmerigo Wang 1678 cb58455cSSam Ravnborgkernelversion: 1679 2244cbd8SSam Ravnborg @echo $(KERNELVERSION) 1680 1da177e4SLinus Torvalds 1681 c398ff00SMike Marciniszynimage_name: 1682 c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1683 c398ff00SMike Marciniszyn 1684 ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1685 ea01fa9fSBorislav Petkovtools/: FORCE 1686 bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1687 8e9b4667SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ 1688 ea01fa9fSBorislav Petkov 1689 ea01fa9fSBorislav Petkovtools/%: FORCE 1690 bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1691 8e9b4667SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* 1692 ea01fa9fSBorislav Petkov 1693 06300b21SSam Ravnborg# Single targets 1694 06300b21SSam Ravnborg# --------------------------------------------------------------------------- 1695 bc2546a6SSam Ravnborg# Single targets are compatible with: 1696 e1b8513dSRobert P. J. Day# - build with mixed source and output 1697 bc2546a6SSam Ravnborg# - build with separate output dir 'make O=...' 1698 bc2546a6SSam Ravnborg# - external modules 1699 bc2546a6SSam Ravnborg# 1700 bc2546a6SSam Ravnborg# target-dir => where to store outputfile 1701 bc2546a6SSam Ravnborg# build-dir => directory in kernel source tree to use 1702 06300b21SSam Ravnborg 1703 06300b21SSam Ravnborgifeq ($(KBUILD_EXTMOD),) 1704 aa360879SSam Ravnborg build-dir = $(patsubst %/,%,$(dir $@)) 1705 bc2546a6SSam Ravnborg target-dir = $(dir $@) 1706 06300b21SSam Ravnborgelse 1707 06300b21SSam Ravnborg zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1708 bc2546a6SSam Ravnborg build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1709 bc2546a6SSam Ravnborg target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1710 06300b21SSam Ravnborgendif 1711 06300b21SSam Ravnborg 1712 bc2546a6SSam Ravnborg%.s: %.c prepare scripts FORCE 1713 bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1714 bc2546a6SSam Ravnborg%.i: %.c prepare scripts FORCE 1715 bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1716 bc2546a6SSam Ravnborg%.o: %.c prepare scripts FORCE 1717 bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1718 bc2546a6SSam Ravnborg%.lst: %.c prepare scripts FORCE 1719 bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1720 bc2546a6SSam Ravnborg%.s: %.S prepare scripts FORCE 1721 bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1722 bc2546a6SSam Ravnborg%.o: %.S prepare scripts FORCE 1723 bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1724 15fde675SAndreas Gruenbacher%.symtypes: %.c prepare scripts FORCE 1725 15fde675SAndreas Gruenbacher $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1726 433db3e2SVinÃcius Tinti%.ll: %.c prepare scripts FORCE 1727 433db3e2SVinÃcius Tinti $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1728 bc2546a6SSam Ravnborg 1729 bc2546a6SSam Ravnborg# Modules 1730 31110ebbSSam Ravnborg/: prepare scripts FORCE 1731 31110ebbSSam Ravnborg $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1732 31110ebbSSam Ravnborg $(build)=$(build-dir) 1733 8e2faea8SPeter Foley# Make sure the latest headers are built for Documentation 1734 ddea05faSArnd BergmannDocumentation/ samples/: headers_install 1735 31110ebbSSam Ravnborg%/: prepare scripts FORCE 1736 06300b21SSam Ravnborg $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1737 bc2546a6SSam Ravnborg $(build)=$(build-dir) 1738 bc2546a6SSam Ravnborg%.ko: prepare scripts FORCE 1739 06300b21SSam Ravnborg $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1740 bc2546a6SSam Ravnborg $(build)=$(build-dir) $(@:.ko=.o) 1741 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1742 06300b21SSam Ravnborg 1743 1da177e4SLinus Torvalds# FIXME Should go into a make.lib or something 1744 1da177e4SLinus Torvalds# =========================================================================== 1745 1da177e4SLinus Torvalds 1746 1da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1747 1da177e4SLinus Torvalds cmd_rmdirs = rm -rf $(rm-dirs) 1748 1da177e4SLinus Torvalds 1749 1da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1750 1da177e4SLinus Torvalds cmd_rmfiles = rm -f $(rm-files) 1751 1da177e4SLinus Torvalds 1752 bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 1753 50a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1754 569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1755 5a144a1aSMasahiro Yamada $(KERNELRELEASE) 1756 50a8ec31SSam Ravnborg 1757 7bb9d092SSam Ravnborg# Create temporary dir for module support files 1758 ab19f879SSam Ravnborg# clean it up only when building all modules 1759 ab19f879SSam Ravnborgcmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1760 ab19f879SSam Ravnborg $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1761 1da177e4SLinus Torvalds 1762 1da177e4SLinus Torvalds# read all saved command lines 1763 00d78ab2SMasahiro Yamadacmd_files := $(wildcard .*.cmd) 1764 1da177e4SLinus Torvalds 1765 1da177e4SLinus Torvaldsifneq ($(cmd_files),) 1766 1da177e4SLinus Torvalds $(cmd_files): ; # Do not try to update included dependency files 1767 1da177e4SLinus Torvalds include $(cmd_files) 1768 1da177e4SLinus Torvaldsendif 1769 1da177e4SLinus Torvalds 1770 25815cf5SMasahiro Yamadaendif # ifeq ($(config-targets),1) 1771 25815cf5SMasahiro Yamadaendif # ifeq ($(mixed-targets),1) 1772 1da177e4SLinus Torvaldsendif # skip-makefile 1773 1da177e4SLinus Torvalds 1774 4f193362SPaul SmithPHONY += FORCE 1775 1da177e4SLinus TorvaldsFORCE: 1776 4f193362SPaul Smith 1777 bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1778 fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 1779 4f193362SPaul Smith.PHONY: $(PHONY) 1780