1 b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2 bfeffd15SLinus TorvaldsVERSION = 5 3 8f3d9f35SLinus TorvaldsPATCHLEVEL = 7 4 55922c9dSLinus TorvaldsSUBLEVEL = 0 5 2ef96a5bSLinus TorvaldsEXTRAVERSION = -rc5 6 d6d5df1dSLinus TorvaldsNAME = Kleptomaniac Octopus 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 *121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \ 15 *121c2a13SMasahiro Yamada $(error targets prefixed with '__' are only for internal use)) 16 *121c2a13SMasahiro Yamada 17 ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 18 *121c2a13SMasahiro YamadaPHONY := __all 19 *121c2a13SMasahiro Yamada__all: 20 ba634eceSMasahiro Yamada 21 1da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 22 1da177e4SLinus Torvalds# to get the ordering right. 23 1da177e4SLinus Torvalds# 24 1da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 25 1da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 26 1da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 27 f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 28 1da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 29 1da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 30 1da177e4SLinus Torvalds# is now up to date. 31 1da177e4SLinus Torvalds# 32 1da177e4SLinus Torvalds# The only cases where we need to modify files which have global 33 1da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 34 1da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 35 1da177e4SLinus Torvalds# prepare rule. 36 1da177e4SLinus Torvalds 37 221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 38 3812b8c5SMasahiro Yamada 39 3812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 40 3812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 41 3812b8c5SMasahiro YamadaMAKEFLAGS += -rR 42 3812b8c5SMasahiro Yamada 43 3812b8c5SMasahiro Yamada# Avoid funny character set dependencies 44 3812b8c5SMasahiro Yamadaunexport LC_ALL 45 3812b8c5SMasahiro YamadaLC_COLLATE=C 46 3812b8c5SMasahiro YamadaLC_NUMERIC=C 47 3812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 48 3812b8c5SMasahiro Yamada 49 3812b8c5SMasahiro Yamada# Avoid interference with shell env settings 50 3812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 51 3812b8c5SMasahiro Yamada 52 066b7ed9SMichal Marek# Beautify output 53 066b7ed9SMichal Marek# --------------------------------------------------------------------------- 54 066b7ed9SMichal Marek# 55 066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 56 066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 57 066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 58 066b7ed9SMichal Marek# 59 066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 60 066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 61 066b7ed9SMichal Marek# 62 066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 63 066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 64 066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 65 066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 66 066b7ed9SMichal Marek# 67 066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 68 066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 69 066b7ed9SMichal Marek# 70 066b7ed9SMichal Marek# $(Q)ln $@ :< 71 066b7ed9SMichal Marek# 72 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 73 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 74 505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 75 066b7ed9SMichal Marek# 76 1da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 77 1da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 78 1da177e4SLinus Torvalds 79 1da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 80 1da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 81 1da177e4SLinus Torvaldsendif 82 1da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 83 1da177e4SLinus Torvalds KBUILD_VERBOSE = 0 84 1da177e4SLinus Torvaldsendif 85 1da177e4SLinus Torvalds 86 066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 87 066b7ed9SMichal Marek quiet = 88 066b7ed9SMichal Marek Q = 89 066b7ed9SMichal Marekelse 90 066b7ed9SMichal Marek quiet=quiet_ 91 066b7ed9SMichal Marek Q = @ 92 066b7ed9SMichal Marekendif 93 066b7ed9SMichal Marek 94 066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 95 066b7ed9SMichal Marek# commands 96 066b7ed9SMichal Marek 97 6f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 98 066b7ed9SMichal Marek quiet=silent_ 99 066b7ed9SMichal Marekendif 100 066b7ed9SMichal Marek 101 066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 102 066b7ed9SMichal Marek 103 25b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 104 25b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 105 25b146c5SMasahiro Yamada# 106 25b146c5SMasahiro Yamada# For example, you can do this: 107 25b146c5SMasahiro Yamada# 108 25b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 109 25b146c5SMasahiro Yamada# 110 25b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 111 25b146c5SMasahiro Yamada# two syntaxes to specify it. 112 25b146c5SMasahiro Yamada# 113 1da177e4SLinus Torvalds# 1) O= 114 1da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 115 1da177e4SLinus Torvalds# 116 1da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 117 25b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 118 25b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 119 1da177e4SLinus Torvalds# 120 1da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 121 1da177e4SLinus Torvalds# variable. 122 1da177e4SLinus Torvalds 123 25b146c5SMasahiro Yamada# Do we want to change the working directory? 124 1da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 125 1da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 126 1da177e4SLinus Torvaldsendif 127 1da177e4SLinus Torvalds 128 25b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 129 25b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 130 25b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 131 25b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 132 25b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 133 25b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 134 25b146c5SMasahiro Yamada 135 25b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 136 25b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 137 25b146c5SMasahiro Yamadaelse 138 25b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 139 25b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 140 25b146c5SMasahiro Yamada 141 25b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 142 25b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 143 25b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 144 25b146c5SMasahiro Yamadaelse 145 25b146c5SMasahiro Yamadaneed-sub-make := 1 146 51193b76SRobert Jarzmikendif 147 51193b76SRobert Jarzmik 148 25b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 149 1da177e4SLinus Torvalds 150 25b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 151 25b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 152 25b146c5SMasahiro Yamadaendif 153 25b146c5SMasahiro Yamada 154 25b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 155 80463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 156 80463f1bSMasahiro Yamada# 157 80463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed 158 25b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make. 159 25b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 160 688931a5SMasahiro Yamadaneed-sub-make := 1 161 25b146c5SMasahiro Yamadaendif 162 3812b8c5SMasahiro Yamada 163 93fdddfeSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST)) 164 93fdddfeSMasahiro Yamada 165 688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 166 688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 167 688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 168 688931a5SMasahiro Yamadaneed-sub-make := 1 169 688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 170 93fdddfeSMasahiro Yamada$(this-makefile): ; 171 688931a5SMasahiro Yamadaendif 172 688931a5SMasahiro Yamada 173 25b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 174 221cc2d2SMasahiro Yamadaexport sub_make_done := 1 175 221cc2d2SMasahiro Yamada 176 688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 177 688931a5SMasahiro Yamada 178 *121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make 179 0b35786dSMilton Miller 180 *121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 181 16f89098SCharles Keepax @: 182 0b35786dSMilton Miller 183 c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 184 *121c2a13SMasahiro Yamada__sub-make: 185 25b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 186 1da177e4SLinus Torvalds 187 688931a5SMasahiro Yamadaendif # need-sub-make 188 221cc2d2SMasahiro Yamadaendif # sub_make_done 189 688931a5SMasahiro Yamada 190 1da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 191 688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 192 1da177e4SLinus Torvalds 193 7ff52571SMasahiro Yamada# Do not print "Entering directory ...", 194 7ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 195 7ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 196 7ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 197 7ff52571SMasahiro Yamada 198 aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 199 aa55c8e2SMasahiro Yamada# C compilation. 200 aa55c8e2SMasahiro Yamada# 201 aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 202 aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 203 aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not. 204 aa55c8e2SMasahiro Yamada# 205 036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details, 206 036db11cSCao jin# including where to get the "sparse" utility. 207 aa55c8e2SMasahiro Yamada 208 aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line") 209 aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = $(C) 210 aa55c8e2SMasahiro Yamadaendif 211 aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC 212 aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = 0 213 aa55c8e2SMasahiro Yamadaendif 214 aa55c8e2SMasahiro Yamada 215 7e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 216 7e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 217 aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line") 218 aa55c8e2SMasahiro Yamada KBUILD_EXTMOD := $(M) 219 aa55c8e2SMasahiro Yamadaendif 220 aa55c8e2SMasahiro Yamada 221 051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD 222 051f278eSMasahiro Yamada 223 394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 224 394053f4SMasahiro Yamada 225 25b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 226 9da0763bSMichal Marek # building in the source tree 227 9da0763bSMichal Marek srctree := . 228 051f278eSMasahiro Yamada building_out_of_srctree := 229 9da0763bSMichal Marekelse 230 25b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 231 9da0763bSMichal Marek # building in a subdirectory of the source tree 232 9da0763bSMichal Marek srctree := .. 233 9da0763bSMichal Marek else 234 25b146c5SMasahiro Yamada srctree := $(abs_srctree) 235 9da0763bSMichal Marek endif 236 051f278eSMasahiro Yamada building_out_of_srctree := 1 237 9da0763bSMichal Marekendif 238 2c1f4f12SMasahiro Yamada 239 95fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 240 95fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 241 95fd3f87SMasahiro Yamadaendif 242 2c1f4f12SMasahiro Yamada 243 7e1c0477SMichal Marekobjtree := . 244 6b12de69SMasahiro YamadaVPATH := $(srctree) 245 1da177e4SLinus Torvalds 246 051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 247 1da177e4SLinus Torvalds 248 2c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 249 2c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 250 2c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 251 2c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 252 2c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 253 2c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 254 2c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 255 2c1f4f12SMasahiro Yamada 256 2c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 257 2c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h 258 2c1f4f12SMasahiro Yamada 259 22340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 260 22340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 261 2c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 262 59b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 263 4623980dSDavid Engraf %asm-generic kernelversion %src-pkg dt_binding_check \ 264 4623980dSDavid Engraf outputmakefile 265 a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \ 266 a29d4d8cSMasahiro Yamada kernelrelease 267 394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 268 2c1f4f12SMasahiro Yamada 269 2042b548SMasahiro Yamadaconfig-build := 270 2042b548SMasahiro Yamadamixed-build := 271 2042b548SMasahiro Yamadaneed-config := 1 272 d7942413SMasahiro Yamadamay-sync-config := 1 273 394053f4SMasahiro Yamadasingle-build := 274 2c1f4f12SMasahiro Yamada 275 2c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 276 2c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 277 2042b548SMasahiro Yamada need-config := 278 2c1f4f12SMasahiro Yamada endif 279 2c1f4f12SMasahiro Yamadaendif 280 2c1f4f12SMasahiro Yamada 281 d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 282 d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 283 2042b548SMasahiro Yamada may-sync-config := 284 d7942413SMasahiro Yamada endif 285 d7942413SMasahiro Yamadaendif 286 d7942413SMasahiro Yamada 287 d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 288 2042b548SMasahiro Yamada may-sync-config := 289 d7942413SMasahiro Yamadaendif 290 d7942413SMasahiro Yamada 291 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 292 2c1f4f12SMasahiro Yamada ifneq ($(filter config %config,$(MAKECMDGOALS)),) 293 2042b548SMasahiro Yamada config-build := 1 294 2c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 295 2042b548SMasahiro Yamada mixed-build := 1 296 2c1f4f12SMasahiro Yamada endif 297 2c1f4f12SMasahiro Yamada endif 298 2c1f4f12SMasahiro Yamadaendif 299 22340a06SMasahiro Yamada 300 394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 301 394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 302 394053f4SMasahiro Yamada single-build := 1 303 394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 304 394053f4SMasahiro Yamada mixed-build := 1 305 394053f4SMasahiro Yamada endif 306 394053f4SMasahiro Yamadaendif 307 394053f4SMasahiro Yamada 308 22340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 309 22340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 310 22340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 311 2042b548SMasahiro Yamada mixed-build := 1 312 22340a06SMasahiro Yamada endif 313 22340a06SMasahiro Yamadaendif 314 22340a06SMasahiro Yamada 315 2c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 316 2c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 317 2c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 318 2042b548SMasahiro Yamada mixed-build := 1 319 2c1f4f12SMasahiro Yamada endif 320 2c1f4f12SMasahiro Yamadaendif 321 2c1f4f12SMasahiro Yamada 322 2042b548SMasahiro Yamadaifdef mixed-build 323 2c1f4f12SMasahiro Yamada# =========================================================================== 324 2c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 325 2c1f4f12SMasahiro Yamada# Handle them one by one. 326 2c1f4f12SMasahiro Yamada 327 2c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 328 2c1f4f12SMasahiro Yamada 329 *121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one 330 2c1f4f12SMasahiro Yamada @: 331 2c1f4f12SMasahiro Yamada 332 2c1f4f12SMasahiro Yamada__build_one_by_one: 333 2c1f4f12SMasahiro Yamada $(Q)set -e; \ 334 2c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 335 2c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 336 2c1f4f12SMasahiro Yamada done 337 2c1f4f12SMasahiro Yamada 338 2042b548SMasahiro Yamadaelse # !mixed-build 339 2c1f4f12SMasahiro Yamada 340 2c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include 341 2c1f4f12SMasahiro Yamada 342 2c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 343 2c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 344 2c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 345 2c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 346 2c1f4f12SMasahiro Yamada 347 b2d35fa5SAnders Roxellinclude scripts/subarch.include 348 1da177e4SLinus Torvalds 349 1da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 350 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 351 1da177e4SLinus Torvalds# 352 1da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 353 1da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 354 1da177e4SLinus Torvalds# ARCH can be set during invocation of make: 355 1da177e4SLinus Torvalds# make ARCH=ia64 356 1da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 357 1da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 358 1da177e4SLinus Torvalds 359 1da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 360 1da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 361 1da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 362 1da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 363 1da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 364 1da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 365 1da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 366 1da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 367 2331d1a6SSam RavnborgARCH ?= $(SUBARCH) 368 1da177e4SLinus Torvalds 369 1da177e4SLinus Torvalds# Architecture as present in compile.h 370 1da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 371 6752ed90SThomas GleixnerSRCARCH := $(ARCH) 372 1da177e4SLinus Torvalds 373 d746d647SSam Ravnborg# Additional ARCH settings for x86 374 d746d647SSam Ravnborgifeq ($(ARCH),i386) 375 d746d647SSam Ravnborg SRCARCH := x86 376 d746d647SSam Ravnborgendif 377 d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 378 d746d647SSam Ravnborg SRCARCH := x86 379 d746d647SSam Ravnborgendif 380 74b469f2SSam Ravnborg 381 5e538790SSam Ravnborg# Additional ARCH settings for sparc 382 e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 383 e69f58c0SNamhyung Kim SRCARCH := sparc 384 e69f58c0SNamhyung Kimendif 385 a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 386 5e538790SSam Ravnborg SRCARCH := sparc 387 a439fe51SSam Ravnborgendif 388 2fb9b1bdSSam Ravnborg 389 3cc000b5SPaul Mundt# Additional ARCH settings for sh 390 3cc000b5SPaul Mundtifeq ($(ARCH),sh64) 391 3cc000b5SPaul Mundt SRCARCH := sh 392 3cc000b5SPaul Mundtendif 393 3cc000b5SPaul Mundt 394 14cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 395 41263fc6SBen Gardinerexport KCONFIG_CONFIG 396 14cdd3c4SRoman Zippel 397 2a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile. 398 2a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig 399 2a86f661SMasahiro Yamada 400 1da177e4SLinus Torvalds# SHELL used by kbuild 401 858805b3SMasahiro YamadaCONFIG_SHELL := sh 402 1da177e4SLinus Torvalds 403 6d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 404 6d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 405 6d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 406 d7f14c66SUwe Kleine-König 407 a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 408 a0d1c951SMasahiro YamadaHOSTCC = clang 409 a0d1c951SMasahiro YamadaHOSTCXX = clang++ 410 a0d1c951SMasahiro Yamadaelse 411 1da177e4SLinus TorvaldsHOSTCC = gcc 412 1da177e4SLinus TorvaldsHOSTCXX = g++ 413 a0d1c951SMasahiro Yamadaendif 414 7f3a59dbSMasahiro Yamada 415 7f3a59dbSMasahiro Yamadaexport KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 416 7f3a59dbSMasahiro Yamada -O2 -fomit-frame-pointer -std=gnu89 417 7f3a59dbSMasahiro Yamadaexport KBUILD_USERLDFLAGS := 418 7f3a59dbSMasahiro Yamada 419 7f3a59dbSMasahiro YamadaKBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 420 735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 421 f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 422 f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 423 1da177e4SLinus Torvalds 424 1da177e4SLinus Torvalds# Make variables (CC, etc...) 425 1da177e4SLinus TorvaldsCPP = $(CC) -E 426 a0d1c951SMasahiro Yamadaifneq ($(LLVM),) 427 a0d1c951SMasahiro YamadaCC = clang 428 a0d1c951SMasahiro YamadaLD = ld.lld 429 a0d1c951SMasahiro YamadaAR = llvm-ar 430 a0d1c951SMasahiro YamadaNM = llvm-nm 431 a0d1c951SMasahiro YamadaOBJCOPY = llvm-objcopy 432 a0d1c951SMasahiro YamadaOBJDUMP = llvm-objdump 433 a0d1c951SMasahiro YamadaREADELF = llvm-readelf 434 a0d1c951SMasahiro YamadaOBJSIZE = llvm-size 435 a0d1c951SMasahiro YamadaSTRIP = llvm-strip 436 a0d1c951SMasahiro Yamadaelse 437 a0d1c951SMasahiro YamadaCC = $(CROSS_COMPILE)gcc 438 a0d1c951SMasahiro YamadaLD = $(CROSS_COMPILE)ld 439 1da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 440 1da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 441 1da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 442 1da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 443 eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 444 a0d1c951SMasahiro YamadaOBJSIZE = $(CROSS_COMPILE)size 445 a0d1c951SMasahiro YamadaSTRIP = $(CROSS_COMPILE)strip 446 a0d1c951SMasahiro Yamadaendif 447 e83b9f55SAndrii NakryikoPAHOLE = pahole 448 73a4f6dbSMasahiro YamadaLEX = flex 449 73a4f6dbSMasahiro YamadaYACC = bison 450 1da177e4SLinus TorvaldsAWK = awk 451 caa27b66SSam RavnborgINSTALLKERNEL := installkernel 452 1da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 453 1da177e4SLinus TorvaldsPERL = perl 454 011bf125SMasahiro YamadaPYTHON = python 455 e9781b52SMasahiro YamadaPYTHON3 = python3 456 1da177e4SLinus TorvaldsCHECK = sparse 457 858805b3SMasahiro YamadaBASH = bash 458 1da177e4SLinus Torvalds 459 80a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 460 6c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 461 0c22be07SDouglas AndersonNOSTDINC_FLAGS := 462 6588169dSSam RavnborgCFLAGS_MODULE = 463 6588169dSSam RavnborgAFLAGS_MODULE = 464 6588169dSSam RavnborgLDFLAGS_MODULE = 465 1da177e4SLinus TorvaldsCFLAGS_KERNEL = 466 1da177e4SLinus TorvaldsAFLAGS_KERNEL = 467 b36fad65SMichal MarekLDFLAGS_vmlinux = 468 1da177e4SLinus Torvalds 469 abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 470 abbf1590SDavid HowellsUSERINCLUDE := \ 471 9d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 472 9d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 473 abbf1590SDavid Howells -I$(srctree)/include/uapi \ 474 3308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 475 abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 476 abbf1590SDavid Howells 477 1da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 478 1da177e4SLinus Torvalds# Needed to be compatible with the O= option 479 abbf1590SDavid HowellsLINUXINCLUDE := \ 480 9d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 481 9d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 482 051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 483 f8224f7fSMasahiro Yamada -I$(objtree)/include \ 484 f8224f7fSMasahiro Yamada $(USERINCLUDE) 485 1da177e4SLinus Torvalds 486 42a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 487 eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 488 42a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 489 b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 490 51b97e35SKirill A. Shutemov -Wno-format-security \ 491 433dc2ebSMasahiro Yamada -std=gnu89 492 433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 493 80c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 494 80c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 495 6588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 496 6588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 497 10df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 498 10df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds 499 d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 500 433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS := 501 5241ab4cSMasahiro YamadaCLANG_FLAGS := 502 1da177e4SLinus Torvalds 503 aa824e0cSMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC 504 eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL 505 94f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 506 7bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 507 1da177e4SLinus Torvalds 508 d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 509 0e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 510 0e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 511 222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 512 6588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 513 80c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 514 1da177e4SLinus Torvalds 515 1da177e4SLinus Torvalds# Files to ignore in find ... statements 516 1da177e4SLinus Torvalds 517 ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 518 ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 519 ae63b2d7SPrarit Bhargava -prune -o 520 450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 521 450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 522 1da177e4SLinus Torvalds 523 1da177e4SLinus Torvalds# =========================================================================== 524 1da177e4SLinus Torvalds# Rules shared between *config targets and build targets 525 1da177e4SLinus Torvalds 526 312a3d09SCao jin# Basic helpers built in scripts/basic/ 527 4f193362SPaul SmithPHONY += scripts_basic 528 1da177e4SLinus Torvaldsscripts_basic: 529 1da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 530 638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 531 1da177e4SLinus Torvalds 532 4f193362SPaul SmithPHONY += outputmakefile 533 e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 534 fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 535 fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 536 fd5f0cd6SJan Beulich# output directory. 537 3a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 538 3a51ff34SVladimir Kondratiev# ignore whole output directory 539 1da177e4SLinus Torvaldsoutputmakefile: 540 051f278eSMasahiro Yamadaifdef building_out_of_srctree 541 e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 542 e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 543 e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 544 e8e83a23SMasahiro Yamada echo >&2 "***"; \ 545 e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 546 e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 547 e8e83a23SMasahiro Yamada echo >&2 "***"; \ 548 e8e83a23SMasahiro Yamada false; \ 549 e8e83a23SMasahiro Yamada fi 550 92979997SAndi Kleen $(Q)ln -fsn $(srctree) source 551 4fd61277SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 552 156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 553 156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 554 fd5f0cd6SJan Beulichendif 555 1da177e4SLinus Torvalds 556 99516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 557 ae6b289aSChris Friesifneq ($(CROSS_COMPILE),) 558 5241ab4cSMasahiro YamadaCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 559 ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 560 238bcbc4SMasahiro YamadaCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 561 ef8c4ed9SStefan AgnerGCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 562 ae6b289aSChris Friesendif 563 ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),) 564 238bcbc4SMasahiro YamadaCLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 565 ae6b289aSChris Friesendif 566 7e20e47cSMasahiro Yamadaifneq ($(LLVM_IAS),1) 567 238bcbc4SMasahiro YamadaCLANG_FLAGS += -no-integrated-as 568 876a0600SNathan Chancellorendif 569 589834b3SNathan ChancellorCLANG_FLAGS += -Werror=unknown-warning-option 570 238bcbc4SMasahiro YamadaKBUILD_CFLAGS += $(CLANG_FLAGS) 571 238bcbc4SMasahiro YamadaKBUILD_AFLAGS += $(CLANG_FLAGS) 572 3bd98050SJoel Stanleyexport CLANG_FLAGS 573 ae6b289aSChris Friesendif 574 ae6b289aSChris Fries 575 315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 576 315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 577 315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 578 315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade. 579 902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 580 315bab4eSMasahiro Yamada 581 2042b548SMasahiro Yamadaifdef config-build 582 1da177e4SLinus Torvalds# =========================================================================== 583 1da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 584 1da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 585 1da177e4SLinus Torvalds 586 1da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 587 1da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 588 1da177e4SLinus Torvalds# used for 'make defconfig' 589 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 590 315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 591 1da177e4SLinus Torvalds 592 36de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 593 31110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 594 31110ebbSSam Ravnborg 595 36de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 596 1da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 597 1da177e4SLinus Torvalds 598 2042b548SMasahiro Yamadaelse #!config-build 599 1da177e4SLinus Torvalds# =========================================================================== 600 1da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 601 1da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 602 1da177e4SLinus Torvalds 603 2c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 604 *121c2a13SMasahiro Yamada# but instead __all depend on modules 605 2c1f4f12SMasahiro YamadaPHONY += all 606 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 607 *121c2a13SMasahiro Yamada__all: all 608 2c1f4f12SMasahiro Yamadaelse 609 *121c2a13SMasahiro Yamada__all: modules 610 2c1f4f12SMasahiro Yamadaendif 611 2c1f4f12SMasahiro Yamada 612 2c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 613 2c1f4f12SMasahiro Yamada# Normally, just do built-in. 614 2c1f4f12SMasahiro Yamada 615 2c1f4f12SMasahiro YamadaKBUILD_MODULES := 616 2c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 617 2c1f4f12SMasahiro Yamada 618 2c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 619 2c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider 620 2c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to 621 2c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them. 622 2c1f4f12SMasahiro Yamada 623 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 624 2c1f4f12SMasahiro Yamada KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 625 2c1f4f12SMasahiro Yamadaendif 626 2c1f4f12SMasahiro Yamada 627 2c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 628 2c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 629 2c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 630 2c1f4f12SMasahiro Yamada 631 *121c2a13SMasahiro Yamadaifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),) 632 2c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 633 2c1f4f12SMasahiro Yamadaendif 634 2c1f4f12SMasahiro Yamada 635 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 636 2c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 637 2c1f4f12SMasahiro Yamadaendif 638 2c1f4f12SMasahiro Yamada 639 2c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 640 2c1f4f12SMasahiro Yamada 641 2042b548SMasahiro Yamadaifdef need-config 642 d93a18f2SMasahiro Yamadainclude include/config/auto.conf 643 d93a18f2SMasahiro Yamadaendif 644 d93a18f2SMasahiro Yamada 645 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 646 1da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 647 1da177e4SLinus Torvaldsinit-y := init/ 648 f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 649 d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 650 1da177e4SLinus Torvaldsnet-y := net/ 651 1da177e4SLinus Torvaldslibs-y := lib/ 652 1da177e4SLinus Torvaldscore-y := usr/ 653 37d9fe47SFeng Wuvirt-y := virt/ 654 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 655 1da177e4SLinus Torvalds 656 315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 657 315bab4eSMasahiro Yamada# command line. 658 315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 659 315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 660 315bab4eSMasahiro Yamadaall: vmlinux 661 315bab4eSMasahiro Yamada 662 315bab4eSMasahiro YamadaCFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 663 315bab4eSMasahiro Yamada $(call cc-option,-fno-tree-loop-im) \ 664 315bab4eSMasahiro Yamada $(call cc-disable-warning,maybe-uninitialized,) 665 5aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 666 315bab4eSMasahiro Yamada 667 b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 668 b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 669 b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 670 b1f4ff74SPaulo Zanoniendif 671 b1f4ff74SPaulo Zanoni 672 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 673 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 674 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 675 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 676 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 677 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 678 669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS 679 669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS 680 669e06b1SMasahiro Yamada 681 315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 682 315bab4eSMasahiro Yamada 683 2042b548SMasahiro Yamadaifdef need-config 684 2042b548SMasahiro Yamadaifdef may-sync-config 685 315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 686 315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 687 315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 688 d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 689 1da177e4SLinus Torvalds 690 05850719SMasahiro Yamada$(KCONFIG_CONFIG): 691 05850719SMasahiro Yamada @echo >&2 '***' 692 05850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 693 05850719SMasahiro Yamada @echo >&2 '***' 694 05850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 695 05850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 696 05850719SMasahiro Yamada @echo >&2 '***' 697 05850719SMasahiro Yamada @/bin/false 698 1da177e4SLinus Torvalds 699 61277981SUlf Magnusson# The actual configuration files used during the build are stored in 700 61277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 701 61277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 702 9390dff6SMasahiro Yamada# 703 9390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 704 9390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 705 f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 706 3044dd05SMasahiro Yamada%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) 707 911a91c3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 708 2042b548SMasahiro Yamadaelse # !may-sync-config 709 d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 710 d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 711 d7942413SMasahiro Yamada# Use auto.conf to trigger the test 712 9ee4e336SSam RavnborgPHONY += include/config/auto.conf 713 9ee4e336SSam Ravnborg 714 9ee4e336SSam Ravnborginclude/config/auto.conf: 715 264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 716 5369f550SMichal Marek echo >&2; \ 717 5369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 718 5369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 719 5369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 720 5369f550SMichal Marek echo >&2 ; \ 721 9ee4e336SSam Ravnborg /bin/false) 722 9ee4e336SSam Ravnborg 723 d7942413SMasahiro Yamadaendif # may-sync-config 724 2042b548SMasahiro Yamadaendif # need-config 725 1da177e4SLinus Torvalds 726 a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 727 ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 728 bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 729 bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 730 6f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 731 a1c48bb1SGeert Uytterhoeven 732 15f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 733 a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 734 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 735 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3 736 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 737 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 738 1da177e4SLinus Torvaldsendif 739 1da177e4SLinus Torvalds 740 69102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 741 69102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 742 b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 743 69102311SJiri Kosina 744 d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov 745 6b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins 746 6b90bd4bSEmese Revfy 747 1873e870SAndi Kleenifdef CONFIG_READABLE_ASM 748 1873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 749 1873e870SAndi Kleen# reorder blocks reorders the control in the function 750 1873e870SAndi Kleen# ipa clone creates specialized cloned functions 751 1873e870SAndi Kleen# partial inlining inlines only parts of functions 752 1873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 753 1873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 754 1873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 755 1873e870SAndi Kleenendif 756 1873e870SAndi Kleen 757 08f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 758 a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 759 35bb5b1eSAndi Kleenendif 760 35bb5b1eSAndi Kleen 761 2a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 762 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 763 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 764 2a61f474SMasahiro Yamada 765 2a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 766 e06b8b98SSam Ravnborg 767 076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 768 a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 769 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier 770 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 771 cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 772 cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names. 773 cfe17c9bSMasahiro Yamada# See modpost pattern 2 774 a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge 775 cfe17c9bSMasahiro Yamadaelse 776 cfe17c9bSMasahiro Yamada 777 cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build. 778 cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 779 9df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable 780 e2079e93SNathan Chancellor 781 e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement. 782 e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and 783 e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 784 e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 785 cfe17c9bSMasahiro Yamadaendif 786 cfe17c9bSMasahiro Yamada 787 0a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 788 1da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 789 a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 790 1da177e4SLinus Torvaldselse 791 7e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 792 7e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 793 7e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 794 7e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 795 7e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 796 7e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 797 a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 798 1da177e4SLinus Torvaldsendif 799 7e9501fdSRabin Vincentendif 800 1da177e4SLinus Torvalds 801 709a972eSKees Cook# Initialize all stack variables with a pattern, if desired. 802 709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL 803 709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 804 709a972eSKees Cookendif 805 709a972eSKees Cook 806 1e88e415SMasahiro YamadaDEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 807 2062afb4SLinus Torvalds 808 1da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 809 866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 810 9d937444SMasahiro YamadaDEBUG_CFLAGS += -gsplit-dwarf 811 866ced95SAndi Kleenelse 812 1e88e415SMasahiro YamadaDEBUG_CFLAGS += -g 813 866ced95SAndi Kleenendif 814 2288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 815 1da177e4SLinus Torvaldsendif 816 bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 817 9d937444SMasahiro YamadaDEBUG_CFLAGS += -gdwarf-4 818 bfaf2dd3SAndi Kleenendif 819 1da177e4SLinus Torvalds 820 d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 821 1e88e415SMasahiro YamadaDEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 822 e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 823 d6f4ceb7SAndi Kleenendif 824 d6f4ceb7SAndi Kleen 825 1e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS) 826 1e88e415SMasahiro Yamadaexport DEBUG_CFLAGS 827 1e88e415SMasahiro Yamada 828 606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 829 07d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD 830 07d04081SVasily Gorbik # gcc 5 supports generating the mcount tables directly 831 07d04081SVasily Gorbik ifeq ($(call cc-option-yn,-mrecord-mcount),y) 832 07d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 833 07d04081SVasily Gorbik export CC_USING_RECORD_MCOUNT := 1 834 a2546faeSSteven Rostedt endif 835 2f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 836 2f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 837 2f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 838 2f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 839 2f4df001SVasily Gorbik endif 840 2f4df001SVasily Gorbik endif 841 07d04081SVasily Gorbikendif 842 a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 843 f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 844 f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 845 f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 846 a2546faeSSteven Rostedt endif 847 f28bc3c3SVasily Gorbikendif 848 f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 849 f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 850 f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 851 72441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 852 cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 853 72441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 854 72441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 855 72441cb1SSteven Rostedt endif 856 72441cb1SSteven Rostedtendif 857 16444a8aSArnaldo Carvalho de Meloendif 858 16444a8aSArnaldo Carvalho de Melo 859 91341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 860 91341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 861 91341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 862 91341d4bSSam Ravnborgendif 863 91341d4bSSam Ravnborg 864 90ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 865 e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 866 e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 867 90ad4052SMasahiro Yamadaendif 868 90ad4052SMasahiro Yamada 869 43bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH 870 43bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 871 43bd3a95SMiroslav Benesendif 872 43bd3a95SMiroslav Benes 873 e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 874 e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 875 e8e69931SSam Ravnborg 876 1da177e4SLinus Torvalds# warn about C99 declaration after statement 877 a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 878 1da177e4SLinus Torvalds 879 0bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 880 8289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 881 0bb95f80SKees Cook 882 070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 883 fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 884 1da177e4SLinus Torvalds 885 217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 886 217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 887 217c3e01SStephen Rothwell 888 5c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least 889 5c45de21SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) 890 44720996SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) 891 5a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) 892 5c45de21SLinus Torvalds 893 adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually 894 adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict) 895 adc71920SLinus Torvalds 896 78a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy 897 78a5255fSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) 898 78a5255fSLinus Torvalds 899 fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 900 a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 901 d0115552SLinus Torvalds 902 87e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this 903 87e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we 904 87e0d4f0SDaniel Borkmann# need to disable it here generally. 905 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 906 87e0d4f0SDaniel Borkmann 907 87e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine 908 87e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled. 909 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 910 87e0d4f0SDaniel Borkmann 911 3ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 912 3ce120b1SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 913 3ce120b1SLinus Torvalds 914 8f7f5c9fSAndi Kleen# conserve stack if available 915 8f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 916 8f7f5c9fSAndi Kleen 917 fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 918 fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 919 fe7c36c7SJosh Triplett 920 ea8daa7bSDaniel Wagner# enforce correct pointer usage 921 ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 922 ea8daa7bSDaniel Wagner 923 c834f0e8SKees Cook# Require designated initializers for all marked structures 924 c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 925 c834f0e8SKees Cook 926 a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 927 a73619a8SMasahiro YamadaKBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 928 a73619a8SMasahiro Yamada 929 29be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is 930 29be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern 931 29be86d7SSeth Forsheeifdef CONFIG_RETPOLINE 932 29be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 933 29be86d7SSeth Forsheeendif 934 29be86d7SSeth Forshee 935 a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan 936 a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn 937 c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan 938 a86fe353SMasahiro Yamada 939 8cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 940 8cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 941 8cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 942 8cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 943 52bcc330SSam Ravnborg 944 89ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id 945 89ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id 946 18991197SRoland McGrath 947 5d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 948 d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 949 5d7d18f5SDavid Howellsendif 950 5d7d18f5SDavid Howells 951 5cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 952 5cf896fbSPeter CollingbourneLDFLAGS_vmlinux += --pack-dyn-relocs=relr 953 5cf896fbSPeter Collingbourneendif 954 5cf896fbSPeter Collingbourne 955 7f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel 956 7f3a59dbSMasahiro YamadaKBUILD_USERCFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS)) 957 7f3a59dbSMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64, $(KBUILD_CFLAGS)) 958 7f3a59dbSMasahiro Yamada 959 80591e61SLuc Van Oostenryck# make the checker run with the right architecture 960 80591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 961 80591e61SLuc Van Oostenryck 962 14516765SLuc Van Oostenryck# insure the checker run with the right endianness 963 14516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 964 14516765SLuc Van Oostenryck 965 1f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 966 1f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 967 1f2f01b1SLuc Van Oostenryck 968 1da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 969 1da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 970 1da177e4SLinus Torvalds# set in the environment 971 1da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 972 1da177e4SLinus Torvalds# this default value 973 1da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 974 1da177e4SLinus Torvalds 975 1da177e4SLinus Torvalds# 976 1da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 977 1da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 978 1da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 979 1da177e4SLinus Torvalds 980 1da177e4SLinus Torvalds# 981 f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 982 f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 983 f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 984 f4d4ffc0SJason Cooper# 985 f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 986 f4d4ffc0SJason Cooper 987 f4d4ffc0SJason Cooper# 988 1da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 989 1da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 990 070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 991 1da177e4SLinus Torvalds# 992 1da177e4SLinus Torvalds 993 df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 994 1da177e4SLinus Torvaldsexport MODLIB 995 1da177e4SLinus Torvalds 996 ac031f26STheodore Ts'o# 997 2ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 998 2ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 999 2ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 1000 177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 1001 2ea03891SSam Ravnborg 1002 ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 1003 ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 1004 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 1005 ac031f26STheodore Ts'oelse 1006 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 1007 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 1008 ac031f26STheodore Ts'oelse 1009 2ea03891SSam Ravnborgmod_strip_cmd = true 1010 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 1011 ac031f26STheodore Ts'oexport mod_strip_cmd 1012 ac031f26STheodore Ts'o 1013 beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 1014 beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 1015 beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ. 1016 beb50df3SBertrand Jacquin 1017 beb50df3SBertrand Jacquinmod_compress_cmd = true 1018 beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS 1019 beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_GZIP 1020 3d1450d5SJason A. Donenfeld mod_compress_cmd = gzip -n -f 1021 beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_GZIP 1022 beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_XZ 1023 3d1450d5SJason A. Donenfeld mod_compress_cmd = xz -f 1024 beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_XZ 1025 beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS 1026 beb50df3SBertrand Jacquinexport mod_compress_cmd 1027 beb50df3SBertrand Jacquin 1028 d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 1029 3ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY)) 1030 3ee550f1SDavid Woodhouse 1031 3ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 1032 e2a666d5SRusty Russellelse 1033 e2a666d5SRusty Russellmod_sign_cmd = true 1034 e2a666d5SRusty Russellendif 1035 e2a666d5SRusty Russellexport mod_sign_cmd 1036 e2a666d5SRusty Russell 1037 056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 1038 056d28d1SRolf Eike Beer 1039 9f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION 1040 9f0c18aeSJosh Poimboeuf has_libelf := $(call try-run,\ 1041 056d28d1SRolf Eike Beer echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 1042 9f0c18aeSJosh Poimboeuf ifeq ($(has_libelf),1) 1043 9f0c18aeSJosh Poimboeuf objtool_target := tools/objtool FORCE 1044 9f0c18aeSJosh Poimboeuf else 1045 9f0c18aeSJosh Poimboeuf SKIP_STACK_VALIDATION := 1 1046 9f0c18aeSJosh Poimboeuf export SKIP_STACK_VALIDATION 1047 9f0c18aeSJosh Poimboeuf endif 1048 9f0c18aeSJosh Poimboeufendif 1049 9f0c18aeSJosh Poimboeuf 1050 e00d8880SMasahiro YamadaPHONY += prepare0 1051 e2a666d5SRusty Russell 1052 394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order 1053 bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps 1054 47801c97SMasahiro Yamada 1055 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1056 cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 1057 1da177e4SLinus Torvalds 1058 1da177e4SLinus Torvaldsvmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 1059 1da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 1060 37d9fe47SFeng Wu $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 1061 1da177e4SLinus Torvalds 1062 1eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 1063 1eaca4b9SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 1064 1eaca4b9SMasahiro Yamada $(drivers-) $(net-) $(libs-) $(virt-)))) 1065 1da177e4SLinus Torvalds 1066 c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 1067 76cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1068 c99f3918SMasahiro Yamada 1069 f49821eeSNicholas Piggininit-y := $(patsubst %/, %/built-in.a, $(init-y)) 1070 f49821eeSNicholas Piggincore-y := $(patsubst %/, %/built-in.a, $(core-y)) 1071 f49821eeSNicholas Piggindrivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1072 f49821eeSNicholas Pigginnet-y := $(patsubst %/, %/built-in.a, $(net-y)) 1073 7273ad2bSMasahiro Yamadalibs-y2 := $(patsubst %/, %/built-in.a, $(filter %/, $(libs-y))) 1074 7273ad2bSMasahiro Yamadaifdef CONFIG_MODULES 1075 7273ad2bSMasahiro Yamadalibs-y1 := $(filter-out %/, $(libs-y)) 1076 7273ad2bSMasahiro Yamadalibs-y2 += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1077 7273ad2bSMasahiro Yamadaelse 1078 1da177e4SLinus Torvaldslibs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1079 7273ad2bSMasahiro Yamadaendif 1080 f49821eeSNicholas Pigginvirt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 1081 1da177e4SLinus Torvalds 1082 1f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1083 d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1084 d151e971SMasahiro Yamada $(drivers-y) $(net-y) $(virt-y) 1085 3a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1) 1086 95698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1087 1f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 1088 85f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1089 233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 1090 1da177e4SLinus Torvalds 1091 d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 1092 1da177e4SLinus Torvalds 1093 3fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 1094 3fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 1095 2441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 1096 c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order 1097 ba79d401SNicolas Ferre $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1098 86556392SNicolas Pitre "$(MAKE) -f $(srctree)/Makefile vmlinux" 1099 2441e78bSNicolas Pitreendif 1100 23121ca2SNicolas Pitre 1101 1f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 1102 1f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 1103 1f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 1104 1f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS 1105 1f50b80aSMasahiro Yamada KBUILD_MODULES := 1 1106 1f50b80aSMasahiro Yamadaendif 1107 1f50b80aSMasahiro Yamada 1108 07a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1109 07a422bbSMasahiro Yamada 1110 88694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 1111 88694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 1112 88694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 1113 88694cffSQuentin Perret 1114 07a422bbSMasahiro Yamada$(autoksyms_h): 1115 88694cffSQuentin Perret $(call cmd,autoksyms_h) 1116 23121ca2SNicolas Pitre 1117 fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1118 fbe6e37dSNicholas Piggin 1119 fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1120 fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 1121 d503ac53SMasahiro Yamada $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1122 fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1123 2441e78bSNicolas Pitre 1124 3fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1125 1f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 1126 741f98feSSam Ravnborg 1127 392885eeSMasahiro Yamadatargets := vmlinux 1128 392885eeSMasahiro Yamada 1129 1da177e4SLinus Torvalds# The actual objects are generated when descending, 1130 1da177e4SLinus Torvalds# make sure no implicit rule kicks in 1131 c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ; 1132 1da177e4SLinus Torvalds 1133 ba97df45SMasahiro Yamadafilechk_kernel.release = \ 1134 0d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1135 0d0e7718SMichal Marek 1136 83a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 1137 24512795SMasahiro Yamadainclude/config/kernel.release: FORCE 1138 0d0e7718SMichal Marek $(call filechk,kernel.release) 1139 cb58455cSSam Ravnborg 1140 d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1141 d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1142 d8821622SMasahiro Yamada# in parallel 1143 d8821622SMasahiro YamadaPHONY += scripts 1144 60df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1145 d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1146 cb58455cSSam Ravnborg 1147 1da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 1148 5bb78269SSam Ravnborg# or the modules are listed in "prepare". 1149 5bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 1150 5bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 1151 5bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 1152 1da177e4SLinus Torvalds 1153 a5139fb3SMasahiro YamadaPHONY += prepare archprepare 1154 5bb78269SSam Ravnborg 1155 36de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 1156 3044dd05SMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 1157 3044dd05SMasahiro Yamada include/generated/autoconf.h 1158 5bb78269SSam Ravnborg 1159 65bba042SMasahiro Yamadaprepare0: archprepare 1160 60df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 1161 8d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 1162 86feeaa8SSam Ravnborg 1163 1da177e4SLinus Torvalds# All the preparing.. 1164 b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool 1165 b9ab5ebbSJosh Poimboeuf 1166 2c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 1167 7d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1168 7d0e5c20SMasahiro Yamada 1169 2c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 1170 2c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1171 037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1172 037fc336SMasahiro Yamada generic=include/asm-generic 1173 2c1f4f12SMasahiro Yamadauapi-asm-generic: 1174 037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1175 037fc336SMasahiro Yamada generic=include/uapi/asm-generic 1176 2c1f4f12SMasahiro Yamada 1177 b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool 1178 3b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 1179 ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1) 1180 ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC 1181 ef7cfd00SMasahiro Yamada @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1182 ef7cfd00SMasahiro Yamada @false 1183 ef7cfd00SMasahiro Yamadaelse 1184 ef7cfd00SMasahiro Yamada @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1185 ef7cfd00SMasahiro Yamadaendif 1186 ef7cfd00SMasahiro Yamadaendif 1187 1da177e4SLinus Torvalds 1188 1da177e4SLinus Torvalds# Generate some files 1189 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1190 1da177e4SLinus Torvalds 1191 1da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 1192 1da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 1193 1da177e4SLinus Torvalds 1194 1da177e4SLinus Torvaldsuts_len := 64 1195 63104eecSSam Ravnborgdefine filechk_utsrelease.h 1196 1da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1197 1da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1198 1da177e4SLinus Torvalds exit 1; \ 1199 1da177e4SLinus Torvalds fi; \ 1200 ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1201 1da177e4SLinus Torvaldsendef 1202 1da177e4SLinus Torvalds 1203 63104eecSSam Ravnborgdefine filechk_version.h 1204 ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 1205 78d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1206 ad774086SMasahiro Yamada echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 1207 63104eecSSam Ravnborgendef 1208 63104eecSSam Ravnborg 1209 43fee2b2SMasahiro Yamada$(version_h): FORCE 1210 1da177e4SLinus Torvalds $(call filechk,version.h) 1211 223c24a7SMichal Marek $(Q)rm -f $(old_version_h) 1212 1da177e4SLinus Torvalds 1213 273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 1214 63104eecSSam Ravnborg $(call filechk,utsrelease.h) 1215 63104eecSSam Ravnborg 1216 179efcb4SVegard NossumPHONY += headerdep 1217 179efcb4SVegard Nossumheaderdep: 1218 9663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1219 9663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1220 179efcb4SVegard Nossum 1221 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1222 8d730cfbSDavid Woodhouse# Kernel headers 1223 8d730cfbSDavid Woodhouse 1224 e6883b18SSam Ravnborg#Default location for installed headers 1225 e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1226 e6883b18SSam Ravnborg 1227 59b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1228 59b2bd05SMasahiro Yamada cmd_headers_install = \ 1229 59b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 1230 59b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1231 59b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 1232 6d716275SDavid Woodhouse 1233 8d730cfbSDavid WoodhousePHONY += headers_install 1234 59b2bd05SMasahiro Yamadaheaders_install: headers 1235 59b2bd05SMasahiro Yamada $(call cmd,headers_install) 1236 4f193362SPaul Smith 1237 1da177e4SLinus TorvaldsPHONY += archheaders archscripts 1238 1da177e4SLinus Torvalds 1239 a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1240 1da177e4SLinus Torvalds 1241 59b2bd05SMasahiro YamadaPHONY += headers 1242 59b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 1243 9d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1244 2fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1245 d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1246 d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1247 1f85712eSMike Frysinger 1248 7ecaf069SMasahiro Yamada# Deprecated. It is no-op now. 1249 68475359SDavid WoodhousePHONY += headers_check 1250 7ecaf069SMasahiro Yamadaheaders_check: 1251 7ecaf069SMasahiro Yamada @: 1252 68475359SDavid Woodhouse 1253 e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 1254 59b2bd05SMasahiro Yamadaprepare: headers 1255 e949f4c2SMasahiro Yamadaendif 1256 1da177e4SLinus Torvalds 1257 bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1258 bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1259 bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1260 bdd7714bSMasahiro Yamada 1261 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1262 5a5da78bSShuah Khan# Kernel selftest 1263 5a5da78bSShuah Khan 1264 5a5da78bSShuah KhanPHONY += kselftest 1265 5a5da78bSShuah Khankselftest: 1266 2bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1267 5a5da78bSShuah Khan 1268 17eac6c2SShuah Khankselftest-%: FORCE 1269 17eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1270 dcb825a9SWang Long 1271 3d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 1272 3d6dee7aSBamvor Jian Zhangkselftest-merge: 1273 3d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1274 6d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1275 6d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1276 3e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1277 3d6dee7aSBamvor Jian Zhang 1278 5a5da78bSShuah Khan# --------------------------------------------------------------------------- 1279 37c8a5faSRob Herring# Devicetree files 1280 37c8a5faSRob Herring 1281 37c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1282 37c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 1283 37c8a5faSRob Herringendif 1284 37c8a5faSRob Herring 1285 37c8a5faSRob Herringifneq ($(dtstree),) 1286 37c8a5faSRob Herring 1287 a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc 1288 37c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1289 37c8a5faSRob Herring 1290 c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check 1291 b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc 1292 37c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 1293 37c8a5faSRob Herring 1294 b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1295 e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1296 b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1297 b5154bf6SMasahiro Yamadaendif 1298 b5154bf6SMasahiro Yamada 1299 b5154bf6SMasahiro Yamadadtbs_check: dtbs 1300 4f0e3a57SRob Herring 1301 37c8a5faSRob Herringdtbs_install: 1302 2431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 1303 37c8a5faSRob Herring 1304 37c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 1305 37c8a5faSRob Herringall: dtbs 1306 37c8a5faSRob Herringendif 1307 37c8a5faSRob Herring 1308 37c8a5faSRob Herringendif 1309 37c8a5faSRob Herring 1310 37c8a5faSRob HerringPHONY += scripts_dtc 1311 37c8a5faSRob Herringscripts_dtc: scripts_basic 1312 37c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 1313 37c8a5faSRob Herring 1314 e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1315 e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1316 e10c4321SMasahiro Yamadaendif 1317 e10c4321SMasahiro Yamada 1318 c473a8d0SMasahiro YamadaPHONY += dt_binding_check 1319 4f0e3a57SRob Herringdt_binding_check: scripts_dtc 1320 4f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1321 4f0e3a57SRob Herring 1322 37c8a5faSRob Herring# --------------------------------------------------------------------------- 1323 1da177e4SLinus Torvalds# Modules 1324 1da177e4SLinus Torvalds 1325 1da177e4SLinus Torvaldsifdef CONFIG_MODULES 1326 1da177e4SLinus Torvalds 1327 1da177e4SLinus Torvalds# By default, build modules as well 1328 1da177e4SLinus Torvalds 1329 73d1393eSMichal Marekall: modules 1330 1da177e4SLinus Torvalds 1331 1da177e4SLinus Torvalds# Build modules 1332 551559e1STejun Heo# 1333 551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1334 551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1335 551559e1STejun Heo# using awk while concatenating to the final file. 1336 1da177e4SLinus Torvalds 1337 4f193362SPaul SmithPHONY += modules 1338 8b41fc44SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order 1339 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1340 3a48a919SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 1341 1da177e4SLinus Torvalds 1342 c99f3918SMasahiro Yamadamodules.order: descend 1343 c99f3918SMasahiro Yamada $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1344 a6c36632SMichal Marek 1345 1da177e4SLinus Torvalds# Target to prepare building external modules 1346 4f193362SPaul SmithPHONY += modules_prepare 1347 059bc9fcSMasahiro Yamadamodules_prepare: prepare 1348 1da177e4SLinus Torvalds 1349 1da177e4SLinus Torvalds# Target to install modules 1350 4f193362SPaul SmithPHONY += modules_install 1351 1da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 1352 1da177e4SLinus Torvalds 1353 4f193362SPaul SmithPHONY += _modinst_ 1354 2da30e70SMichal Marek_modinst_: 1355 1da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 1356 1da177e4SLinus Torvalds @rm -f $(MODLIB)/source 1357 1da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 1358 8e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 1359 1da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1360 1da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 1361 7e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 1362 1da177e4SLinus Torvalds fi 1363 1bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 1364 8b41fc44SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 1365 898490c0SAlexey Gladkov @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1366 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1367 1da177e4SLinus Torvalds 1368 50a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 1369 1da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 1370 1da177e4SLinus Torvalds# boot script depmod is the master version. 1371 4f193362SPaul SmithPHONY += _modinst_post 1372 6d128e1eSLinus Torvalds_modinst_post: _modinst_ 1373 50a8ec31SSam Ravnborg $(call cmd,depmod) 1374 1da177e4SLinus Torvalds 1375 d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1376 d890f510SJosh BoyerPHONY += modules_sign 1377 d890f510SJosh Boyermodules_sign: 1378 d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1379 d890f510SJosh Boyerendif 1380 d890f510SJosh Boyer 1381 1da177e4SLinus Torvaldselse # CONFIG_MODULES 1382 1da177e4SLinus Torvalds 1383 1da177e4SLinus Torvalds# Modules not configured 1384 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1385 1da177e4SLinus Torvalds 1386 612e47ceSMasahiro YamadaPHONY += modules modules_install 1387 612e47ceSMasahiro Yamadamodules modules_install: 1388 5369f550SMichal Marek @echo >&2 1389 5369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 1390 5369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 1391 5369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 1392 5369f550SMichal Marek @echo >&2 1393 1da177e4SLinus Torvalds @exit 1 1394 1da177e4SLinus Torvalds 1395 1da177e4SLinus Torvaldsendif # CONFIG_MODULES 1396 1da177e4SLinus Torvalds 1397 1da177e4SLinus Torvalds### 1398 1da177e4SLinus Torvalds# Cleaning is done on three levels. 1399 1da177e4SLinus Torvalds# make clean Delete most generated files 1400 1da177e4SLinus Torvalds# Leave enough to build external modules 1401 1da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 1402 1da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 1403 1da177e4SLinus Torvalds 1404 1da177e4SLinus Torvalds# Directories & files removed with 'make clean' 1405 0663c68cSMasahiro YamadaCLEAN_FILES += include/ksym \ 1406 0663c68cSMasahiro Yamada modules.builtin modules.builtin.modinfo modules.nsdeps 1407 1da177e4SLinus Torvalds 1408 1da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 1409 0663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated \ 1410 46a63d4bSMasahiro Yamada arch/$(SRCARCH)/include/generated .tmp_objdiff \ 1411 0663c68cSMasahiro Yamada debian snap tar-install \ 1412 0663c68cSMasahiro Yamada .config .config.old .version \ 1413 46457133SMasahiro Yamada Module.symvers \ 1414 fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1415 fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 1416 46a63d4bSMasahiro Yamada signing_key.x509.signer vmlinux-gdb.py \ 1417 46a63d4bSMasahiro Yamada *.spec 1418 1da177e4SLinus Torvalds 1419 46457133SMasahiro Yamada# Directories & files removed with 'make distclean' 1420 46457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 1421 46457133SMasahiro Yamada 1422 1da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 1423 1da177e4SLinus Torvalds# 1424 1da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 1425 1da177e4SLinus Torvalds 1426 76cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 1427 1da177e4SLinus Torvalds 1428 bd1ee804SPawel Mollvmlinuxclean: 1429 bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1430 fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1431 bd1ee804SPawel Moll 1432 bd1ee804SPawel Mollclean: archclean vmlinuxclean 1433 1da177e4SLinus Torvalds 1434 1da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 1435 1da177e4SLinus Torvalds# 1436 1da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1437 cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 1438 1da177e4SLinus Torvalds 1439 b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 1440 1da177e4SLinus Torvalds$(mrproper-dirs): 1441 1da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1442 1da177e4SLinus Torvalds 1443 b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 1444 1da177e4SLinus Torvalds $(call cmd,rmfiles) 1445 1da177e4SLinus Torvalds 1446 1da177e4SLinus Torvalds# distclean 1447 1da177e4SLinus Torvalds# 1448 46457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 1449 46457133SMasahiro Yamada 1450 4f193362SPaul SmithPHONY += distclean 1451 1da177e4SLinus Torvalds 1452 1da177e4SLinus Torvaldsdistclean: mrproper 1453 46457133SMasahiro Yamada $(call cmd,rmfiles) 1454 1da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 1455 1da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1456 f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1457 f78271dfSMasahiro Yamada -o -name 'core' \) \ 1458 1da177e4SLinus Torvalds -type f -print | xargs rm -f 1459 1da177e4SLinus Torvalds 1460 1da177e4SLinus Torvalds 1461 1da177e4SLinus Torvalds# Packaging of the kernel to various formats 1462 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1463 1da177e4SLinus Torvalds 1464 bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1465 000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1466 031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1467 000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1468 1da177e4SLinus Torvalds 1469 1da177e4SLinus Torvalds# Brief documentation of the typical targets used 1470 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1471 1da177e4SLinus Torvalds 1472 5dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1473 a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 1474 5dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1475 5dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 1476 1da177e4SLinus Torvalds 1477 fe69b420SMasahiro YamadaPHONY += help 1478 1da177e4SLinus Torvaldshelp: 1479 1da177e4SLinus Torvalds @echo 'Cleaning targets:' 1480 5ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 1481 5cc8d246SJesper Juhl @echo ' enough build support to build external modules' 1482 5ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 1483 5cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 1484 1da177e4SLinus Torvalds @echo '' 1485 1da177e4SLinus Torvalds @echo 'Configuration targets:' 1486 1da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1487 1da177e4SLinus Torvalds @echo '' 1488 1da177e4SLinus Torvalds @echo 'Other generic targets:' 1489 1da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 1490 1da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 1491 1da177e4SLinus Torvalds @echo '* modules - Build all modules' 1492 9cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1493 1da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 1494 40ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1495 433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1496 433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 1497 62718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1498 62718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1499 155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1500 c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 1501 1da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 1502 1da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1503 f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 1504 3f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 1505 3f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1506 3f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 1507 2fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1508 59df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 1509 2fb9b1bdSSam Ravnborg echo '' 1510 31b8cc80SRandy Dunlap @echo 'Static analysers:' 1511 1da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1512 1da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1513 aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1514 ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1515 295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 1516 74425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 1517 7f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 1518 74425eeeSNicolas Palix @echo '' 1519 eb8305aeSMatthias Maennich @echo 'Tools:' 1520 eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1521 eb8305aeSMatthias Maennich @echo '' 1522 31b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1523 e51d8dacSShuah Khan @echo ' kselftest - Build and run kernel selftest' 1524 5a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 1525 5a5da78bSShuah Khan @echo ' running kselftest on it' 1526 e51d8dacSShuah Khan @echo ' Run as root for full coverage' 1527 e51d8dacSShuah Khan @echo ' kselftest-all - Build kernel selftest' 1528 e51d8dacSShuah Khan @echo ' kselftest-install - Build and install kernel selftest' 1529 dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1530 e51d8dacSShuah Khan @echo ' kselftest-merge - Merge all the config dependencies of' 1531 e51d8dacSShuah Khan @echo ' kselftest to existing .config.' 1532 5a5da78bSShuah Khan @echo '' 1533 37c8a5faSRob Herring @$(if $(dtstree), \ 1534 37c8a5faSRob Herring echo 'Devicetree:'; \ 1535 37c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 1536 37c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1537 7aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 1538 7aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 1539 37c8a5faSRob Herring echo '') 1540 37c8a5faSRob Herring 1541 31b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 1542 31b8cc80SRandy Dunlap @echo ' use "make tools/help"' 1543 31b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 1544 31b8cc80SRandy Dunlap @echo '' 1545 1da177e4SLinus Torvalds @echo 'Kernel packaging:' 1546 000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1547 1da177e4SLinus Torvalds @echo '' 1548 1da177e4SLinus Torvalds @echo 'Documentation targets:' 1549 cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1550 1da177e4SLinus Torvalds @echo '' 1551 01dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 1552 1da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 1553 01dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 1554 1da177e4SLinus Torvalds @echo '' 1555 1da177e4SLinus Torvalds @$(if $(boards), \ 1556 1da177e4SLinus Torvalds $(foreach b, $(boards), \ 1557 4234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1558 1da177e4SLinus Torvalds echo '') 1559 5dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 1560 5dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 1561 5dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1562 5dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 1563 5dffbe81SSegher Boessenkool echo '') 1564 1da177e4SLinus Torvalds 1565 1da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1566 45d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1567 1da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1568 a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1569 a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1570 701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1571 af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1572 e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 1573 28bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 1574 28bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 1575 28bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1576 a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 1577 1da177e4SLinus Torvalds @echo '' 1578 1da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1579 1da177e4SLinus Torvalds @echo 'For further info see the ./README file' 1580 1da177e4SLinus Torvalds 1581 1da177e4SLinus Torvalds 1582 5dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 1583 5dffbe81SSegher Boessenkool 1584 5dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 1585 5dffbe81SSegher Boessenkool 1586 fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1587 5dffbe81SSegher Boessenkool 1588 5dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 1589 5dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 1590 5dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 1591 5dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 1592 5dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1593 5dffbe81SSegher Boessenkool echo '') 1594 5dffbe81SSegher Boessenkool 1595 5dffbe81SSegher Boessenkool 1596 1da177e4SLinus Torvalds# Documentation targets 1597 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1598 e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1599 e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 1600 22cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1601 bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1602 cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 1603 1da177e4SLinus Torvalds 1604 67274c08SMasahiro Yamada# Misc 1605 67274c08SMasahiro Yamada# --------------------------------------------------------------------------- 1606 67274c08SMasahiro Yamada 1607 67274c08SMasahiro YamadaPHONY += scripts_gdb 1608 7a739ce5SMasahiro Yamadascripts_gdb: prepare0 1609 1e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 1610 8d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1611 67274c08SMasahiro Yamada 1612 67274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 1613 67274c08SMasahiro Yamadaall: scripts_gdb 1614 67274c08SMasahiro Yamadaendif 1615 67274c08SMasahiro Yamada 1616 1da177e4SLinus Torvaldselse # KBUILD_EXTMOD 1617 1da177e4SLinus Torvalds 1618 1da177e4SLinus Torvalds### 1619 1da177e4SLinus Torvalds# External module support. 1620 1da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 1621 1da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 1622 1da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 1623 1da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 1624 1da177e4SLinus Torvalds# be used. 1625 1da177e4SLinus Torvalds# 1626 1da177e4SLinus Torvalds# The following are the only valid targets when building external 1627 1da177e4SLinus Torvalds# modules. 1628 1da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 1629 1da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 1630 1da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 1631 1da177e4SLinus Torvalds# make M=dir modules_install 1632 070b98bfSSam Ravnborg# Install the modules built in the module directory 1633 1da177e4SLinus Torvalds# Assumes install directory is already created 1634 1da177e4SLinus Torvalds 1635 1da177e4SLinus Torvalds# We are always building modules 1636 1da177e4SLinus TorvaldsKBUILD_MODULES := 1 1637 1da177e4SLinus Torvalds 1638 4f193362SPaul SmithPHONY += $(objtree)/Module.symvers 1639 1da177e4SLinus Torvalds$(objtree)/Module.symvers: 1640 1da177e4SLinus Torvalds @test -e $(objtree)/Module.symvers || ( \ 1641 1da177e4SLinus Torvalds echo; \ 1642 1da177e4SLinus Torvalds echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1643 1da177e4SLinus Torvalds echo " is missing; modules will have no dependencies and modversions."; \ 1644 1da177e4SLinus Torvalds echo ) 1645 1da177e4SLinus Torvalds 1646 c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 1647 c99f3918SMasahiro YamadaPHONY += modules 1648 c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers 1649 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1650 1da177e4SLinus Torvalds 1651 4f193362SPaul SmithPHONY += modules_install 1652 a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1653 a67dc21aSSam Ravnborg 1654 a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1655 4f193362SPaul SmithPHONY += _emodinst_ 1656 a67dc21aSSam Ravnborg_emodinst_: 1657 a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1658 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1659 1da177e4SLinus Torvalds 1660 4f193362SPaul SmithPHONY += _emodinst_post 1661 a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1662 a67dc21aSSam Ravnborg $(call cmd,depmod) 1663 a67dc21aSSam Ravnborg 1664 76cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 1665 bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps 1666 1da177e4SLinus Torvalds 1667 fe69b420SMasahiro YamadaPHONY += help 1668 1da177e4SLinus Torvaldshelp: 1669 1da177e4SLinus Torvalds @echo ' Building external modules.' 1670 1da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1671 1da177e4SLinus Torvalds @echo '' 1672 1da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 1673 1da177e4SLinus Torvalds @echo ' modules_install - install the module' 1674 1da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 1675 1da177e4SLinus Torvalds @echo '' 1676 06300b21SSam Ravnborg 1677 059bc9fcSMasahiro YamadaPHONY += prepare 1678 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 1679 1da177e4SLinus Torvalds 1680 b1fbfcb4SMasahiro Yamada# Single targets 1681 b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1682 b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1683 b1fbfcb4SMasahiro Yamada# 1684 b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1685 b1fbfcb4SMasahiro Yamada# 1686 b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1687 b1fbfcb4SMasahiro Yamada# 1688 b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1689 b1fbfcb4SMasahiro Yamada# 1690 b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1691 b1fbfcb4SMasahiro Yamada 1692 b1fbfcb4SMasahiro Yamadaifdef single-build 1693 b1fbfcb4SMasahiro Yamada 1694 b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1695 b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1696 b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1697 b1fbfcb4SMasahiro Yamada 1698 b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost 1699 b1fbfcb4SMasahiro Yamada @: 1700 b1fbfcb4SMasahiro Yamada$(single-no-ko): descend 1701 b1fbfcb4SMasahiro Yamada @: 1702 b1fbfcb4SMasahiro Yamada 1703 b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1704 b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 1705 b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1706 b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp 1707 b1fbfcb4SMasahiro Yamadaendif 1708 b1fbfcb4SMasahiro Yamada 1709 b1fbfcb4SMasahiro YamadaPHONY += single_modpost 1710 b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko) 1711 b1fbfcb4SMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 1712 b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1713 b1fbfcb4SMasahiro Yamada 1714 b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1 1715 b1fbfcb4SMasahiro Yamada 1716 b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1717 b1fbfcb4SMasahiro Yamada 1718 b1fbfcb4SMasahiro Yamada# trim unrelated directories 1719 b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \ 1720 b1fbfcb4SMasahiro Yamada $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1721 b1fbfcb4SMasahiro Yamada 1722 b1fbfcb4SMasahiro Yamadaendif 1723 b1fbfcb4SMasahiro Yamada 1724 c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1725 c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1726 c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1727 c99f3918SMasahiro Yamada# make menuconfig etc. 1728 c99f3918SMasahiro Yamada# Error messages still appears in the original language 1729 c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 1730 c99f3918SMasahiro Yamadadescend: $(build-dirs) 1731 c99f3918SMasahiro Yamada$(build-dirs): prepare 1732 b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ \ 1733 f566e1fbSMasahiro Yamada single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \ 1734 b1fbfcb4SMasahiro Yamada need-builtin=1 need-modorder=1 1735 c99f3918SMasahiro Yamada 1736 76cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 1737 76cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 1738 76cd306dSMasahiro Yamada$(clean-dirs): 1739 76cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1740 76cd306dSMasahiro Yamada 1741 88d7be03SMichal Marekclean: $(clean-dirs) 1742 88d7be03SMichal Marek $(call cmd,rmfiles) 1743 43f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1744 ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1745 4f0e3a57SRob Herring -o -name '*.ko.*' \ 1746 4f0e3a57SRob Herring -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1747 ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 1748 bbc55bdeSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 1749 88d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1750 9a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1751 4fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 1752 88d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 1753 8b41fc44SMasahiro Yamada -o -name '.tmp_*.o.*' \ 1754 6b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1755 433db3e2SVinÃcius Tinti -o -name '*.ll' \ 1756 88d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 1757 88d7be03SMichal Marek 1758 1da177e4SLinus Torvalds# Generate tags for editors 1759 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1760 a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1761 858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 1762 1da177e4SLinus Torvalds 1763 f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 1764 1da177e4SLinus Torvalds $(call cmd,tags) 1765 1da177e4SLinus Torvalds 1766 eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1767 eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1768 eb8305aeSMatthias Maennich 1769 eb8305aeSMatthias MaennichPHONY += nsdeps 1770 bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1771 eb8305aeSMatthias Maennichnsdeps: modules 1772 bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1773 eb8305aeSMatthias Maennich 1774 1da177e4SLinus Torvalds# Scripts to check various things for consistency 1775 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1776 1da177e4SLinus Torvalds 1777 279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1778 279f3dd3SPeter Foley 1779 1da177e4SLinus Torvaldsincludecheck: 1780 436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 1781 1da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 1782 80007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1783 1da177e4SLinus Torvalds 1784 1da177e4SLinus Torvaldsversioncheck: 1785 2ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 1786 1da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 1787 80007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1788 1da177e4SLinus Torvalds 1789 74425eeeSNicolas Palixcoccicheck: 1790 858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 1791 74425eeeSNicolas Palix 1792 1da177e4SLinus Torvaldsnamespacecheck: 1793 1da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 1794 1da177e4SLinus Torvalds 1795 295ac051SAdrian Bunkexport_report: 1796 295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1797 295ac051SAdrian Bunk 1798 c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1799 e3ccf6e3SJeff Dike 1800 011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1801 011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1802 011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1803 011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1804 011e3a9aSJeff Dikeifeq ($(ARCH), um) 1805 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1806 011e3a9aSJeff Dikeelse 1807 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1808 011e3a9aSJeff Dikeendif 1809 1da177e4SLinus Torvaldscheckstack: 1810 1da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1811 75dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1812 1da177e4SLinus Torvalds 1813 7b8ea53dSAmerigo Wangkernelrelease: 1814 7b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1815 01ab1788SAmerigo Wang 1816 cb58455cSSam Ravnborgkernelversion: 1817 2244cbd8SSam Ravnborg @echo $(KERNELVERSION) 1818 1da177e4SLinus Torvalds 1819 c398ff00SMike Marciniszynimage_name: 1820 c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1821 c398ff00SMike Marciniszyn 1822 ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1823 f47a23ceSMasahiro Yamada 1824 f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_) 1825 f47a23ceSMasahiro Yamadatools_silent=s 1826 f47a23ceSMasahiro Yamadaendif 1827 f47a23ceSMasahiro Yamada 1828 ea01fa9fSBorislav Petkovtools/: FORCE 1829 bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1830 75dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1831 ea01fa9fSBorislav Petkov 1832 ea01fa9fSBorislav Petkovtools/%: FORCE 1833 bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1834 75dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1835 ea01fa9fSBorislav Petkov 1836 1da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1837 0663c68cSMasahiro Yamada cmd_rmfiles = rm -rf $(rm-files) 1838 1da177e4SLinus Torvalds 1839 bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 1840 50a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1841 569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1842 5a144a1aSMasahiro Yamada $(KERNELRELEASE) 1843 50a8ec31SSam Ravnborg 1844 392885eeSMasahiro Yamada# read saved command lines for existing targets 1845 392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 1846 1da177e4SLinus Torvalds 1847 b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1848 1da177e4SLinus Torvalds 1849 46b7c492SSZ Lin (林上智)endif # config-build 1850 2042b548SMasahiro Yamadaendif # mixed-build 1851 688931a5SMasahiro Yamadaendif # need-sub-make 1852 1da177e4SLinus Torvalds 1853 4f193362SPaul SmithPHONY += FORCE 1854 1da177e4SLinus TorvaldsFORCE: 1855 4f193362SPaul Smith 1856 bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1857 fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 1858 4f193362SPaul Smith.PHONY: $(PHONY) 1859