1 b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2 bfeffd15SLinus TorvaldsVERSION = 5 3 bb6d3fb3SLinus TorvaldsPATCHLEVEL = 6 4 55922c9dSLinus TorvaldsSUBLEVEL = 0 5 98d54f81SLinus TorvaldsEXTRAVERSION = -rc4 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 ba634eceSMasahiro Yamada# That's our default target when none is given on the command line 15 ba634eceSMasahiro YamadaPHONY := _all 16 ba634eceSMasahiro Yamada_all: 17 ba634eceSMasahiro Yamada 18 1da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 19 1da177e4SLinus Torvalds# to get the ordering right. 20 1da177e4SLinus Torvalds# 21 1da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 22 1da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 23 1da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 24 f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally 25 1da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 26 1da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 27 1da177e4SLinus Torvalds# is now up to date. 28 1da177e4SLinus Torvalds# 29 1da177e4SLinus Torvalds# The only cases where we need to modify files which have global 30 1da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 31 1da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 32 1da177e4SLinus Torvalds# prepare rule. 33 1da177e4SLinus Torvalds 34 221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1) 35 3812b8c5SMasahiro Yamada 36 3812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables 37 3812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour) 38 3812b8c5SMasahiro YamadaMAKEFLAGS += -rR 39 3812b8c5SMasahiro Yamada 40 3812b8c5SMasahiro Yamada# Avoid funny character set dependencies 41 3812b8c5SMasahiro Yamadaunexport LC_ALL 42 3812b8c5SMasahiro YamadaLC_COLLATE=C 43 3812b8c5SMasahiro YamadaLC_NUMERIC=C 44 3812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC 45 3812b8c5SMasahiro Yamada 46 3812b8c5SMasahiro Yamada# Avoid interference with shell env settings 47 3812b8c5SMasahiro Yamadaunexport GREP_OPTIONS 48 3812b8c5SMasahiro Yamada 49 066b7ed9SMichal Marek# Beautify output 50 066b7ed9SMichal Marek# --------------------------------------------------------------------------- 51 066b7ed9SMichal Marek# 52 066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 53 066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 54 066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 55 066b7ed9SMichal Marek# 56 066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 57 066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 58 066b7ed9SMichal Marek# 59 066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 60 066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 61 066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 62 066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 63 066b7ed9SMichal Marek# 64 066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 65 066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 66 066b7ed9SMichal Marek# 67 066b7ed9SMichal Marek# $(Q)ln $@ :< 68 066b7ed9SMichal Marek# 69 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 70 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 71 505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 72 066b7ed9SMichal Marek# 73 1da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 74 1da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 75 1da177e4SLinus Torvalds 76 1da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 77 1da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 78 1da177e4SLinus Torvaldsendif 79 1da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 80 1da177e4SLinus Torvalds KBUILD_VERBOSE = 0 81 1da177e4SLinus Torvaldsendif 82 1da177e4SLinus Torvalds 83 066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 84 066b7ed9SMichal Marek quiet = 85 066b7ed9SMichal Marek Q = 86 066b7ed9SMichal Marekelse 87 066b7ed9SMichal Marek quiet=quiet_ 88 066b7ed9SMichal Marek Q = @ 89 066b7ed9SMichal Marekendif 90 066b7ed9SMichal Marek 91 066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 92 066b7ed9SMichal Marek# commands 93 066b7ed9SMichal Marek 94 6f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 95 066b7ed9SMichal Marek quiet=silent_ 96 066b7ed9SMichal Marekendif 97 066b7ed9SMichal Marek 98 066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 99 066b7ed9SMichal Marek 100 25b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory. 101 25b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree. 102 25b146c5SMasahiro Yamada# 103 25b146c5SMasahiro Yamada# For example, you can do this: 104 25b146c5SMasahiro Yamada# 105 25b146c5SMasahiro Yamada# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 106 25b146c5SMasahiro Yamada# 107 25b146c5SMasahiro Yamada# If you want to save output files in a different location, there are 108 25b146c5SMasahiro Yamada# two syntaxes to specify it. 109 25b146c5SMasahiro Yamada# 110 1da177e4SLinus Torvalds# 1) O= 111 1da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 112 1da177e4SLinus Torvalds# 113 1da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 114 25b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory. 115 25b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make 116 1da177e4SLinus Torvalds# 117 1da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 118 1da177e4SLinus Torvalds# variable. 119 1da177e4SLinus Torvalds 120 25b146c5SMasahiro Yamada# Do we want to change the working directory? 121 1da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 122 1da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 123 1da177e4SLinus Torvaldsendif 124 1da177e4SLinus Torvalds 125 25b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),) 126 25b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 127 25b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here. 128 25b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 129 25b146c5SMasahiro Yamada$(if $(abs_objtree),, \ 130 25b146c5SMasahiro Yamada $(error failed to create output directory "$(KBUILD_OUTPUT)")) 131 25b146c5SMasahiro Yamada 132 25b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks 133 25b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree)) 134 25b146c5SMasahiro Yamadaelse 135 25b146c5SMasahiro Yamadaabs_objtree := $(CURDIR) 136 25b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),) 137 25b146c5SMasahiro Yamada 138 25b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR)) 139 25b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory. 140 25b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory 141 25b146c5SMasahiro Yamadaelse 142 25b146c5SMasahiro Yamadaneed-sub-make := 1 143 51193b76SRobert Jarzmikendif 144 51193b76SRobert Jarzmik 145 25b146c5SMasahiro Yamadaabs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 146 1da177e4SLinus Torvalds 147 25b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1) 148 25b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons) 149 25b146c5SMasahiro Yamadaendif 150 25b146c5SMasahiro Yamada 151 25b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree)) 152 80463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src 153 80463f1bSMasahiro Yamada# 154 80463f1bSMasahiro Yamada# This does not become effective immediately because MAKEFLAGS is re-parsed 155 25b146c5SMasahiro Yamada# once after the Makefile is read. We need to invoke sub-make. 156 25b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree) 157 688931a5SMasahiro Yamadaneed-sub-make := 1 158 25b146c5SMasahiro Yamadaendif 159 3812b8c5SMasahiro Yamada 160 688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),) 161 688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 162 688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile. 163 688931a5SMasahiro Yamadaneed-sub-make := 1 164 688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile. 165 688931a5SMasahiro Yamada$(lastword $(MAKEFILE_LIST)): ; 166 688931a5SMasahiro Yamadaendif 167 688931a5SMasahiro Yamada 168 25b146c5SMasahiro Yamadaexport abs_srctree abs_objtree 169 221cc2d2SMasahiro Yamadaexport sub_make_done := 1 170 221cc2d2SMasahiro Yamada 171 688931a5SMasahiro Yamadaifeq ($(need-sub-make),1) 172 688931a5SMasahiro Yamada 173 0b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make 174 0b35786dSMilton Miller 175 0209987fSMasahiro Yamada$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make 176 16f89098SCharles Keepax @: 177 0b35786dSMilton Miller 178 c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables 179 2e8d696bSMasahiro Yamadasub-make: 180 25b146c5SMasahiro Yamada $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 181 1da177e4SLinus Torvalds 182 688931a5SMasahiro Yamadaendif # need-sub-make 183 221cc2d2SMasahiro Yamadaendif # sub_make_done 184 688931a5SMasahiro Yamada 185 1da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 186 688931a5SMasahiro Yamadaifeq ($(need-sub-make),) 187 1da177e4SLinus Torvalds 188 7ff52571SMasahiro Yamada# Do not print "Entering directory ...", 189 7ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 190 7ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 191 7ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 192 7ff52571SMasahiro Yamada 193 aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 194 aa55c8e2SMasahiro Yamada# C compilation. 195 aa55c8e2SMasahiro Yamada# 196 aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 197 aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 198 aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not. 199 aa55c8e2SMasahiro Yamada# 200 036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details, 201 036db11cSCao jin# including where to get the "sparse" utility. 202 aa55c8e2SMasahiro Yamada 203 aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line") 204 aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = $(C) 205 aa55c8e2SMasahiro Yamadaendif 206 aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC 207 aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = 0 208 aa55c8e2SMasahiro Yamadaendif 209 aa55c8e2SMasahiro Yamada 210 7e35b425SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 211 7e35b425SMasahiro Yamada# directory of external module to build. Setting M= takes precedence. 212 aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line") 213 aa55c8e2SMasahiro Yamada KBUILD_EXTMOD := $(M) 214 aa55c8e2SMasahiro Yamadaendif 215 aa55c8e2SMasahiro Yamada 216 051f278eSMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD 217 051f278eSMasahiro Yamada 218 394053f4SMasahiro Yamadaextmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 219 394053f4SMasahiro Yamada 220 25b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree)) 221 9da0763bSMichal Marek # building in the source tree 222 9da0763bSMichal Marek srctree := . 223 051f278eSMasahiro Yamada building_out_of_srctree := 224 9da0763bSMichal Marekelse 225 25b146c5SMasahiro Yamada ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 226 9da0763bSMichal Marek # building in a subdirectory of the source tree 227 9da0763bSMichal Marek srctree := .. 228 9da0763bSMichal Marek else 229 25b146c5SMasahiro Yamada srctree := $(abs_srctree) 230 9da0763bSMichal Marek endif 231 051f278eSMasahiro Yamada building_out_of_srctree := 1 232 9da0763bSMichal Marekendif 233 2c1f4f12SMasahiro Yamada 234 95fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),) 235 95fd3f87SMasahiro Yamadasrctree := $(abs_srctree) 236 95fd3f87SMasahiro Yamadaendif 237 2c1f4f12SMasahiro Yamada 238 7e1c0477SMichal Marekobjtree := . 239 6b12de69SMasahiro YamadaVPATH := $(srctree) 240 1da177e4SLinus Torvalds 241 051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH 242 1da177e4SLinus Torvalds 243 2c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets 244 2c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile 245 2c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including 246 2c1f4f12SMasahiro Yamada# mixing *config targets and build targets. 247 2c1f4f12SMasahiro Yamada# For example 'make oldconfig all'. 248 2c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation 249 2c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config). 250 2c1f4f12SMasahiro Yamada 251 2c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h 252 2c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h 253 2c1f4f12SMasahiro Yamada 254 22340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs 255 22340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \ 256 2c1f4f12SMasahiro Yamada cscope gtags TAGS tags help% %docs check% coccicheck \ 257 59b2bd05SMasahiro Yamada $(version_h) headers headers_% archheaders archscripts \ 258 9dffecc1SMasahiro Yamada %asm-generic kernelversion %src-pkg dt_binding_check 259 a29d4d8cSMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) install %install \ 260 a29d4d8cSMasahiro Yamada kernelrelease 261 394053f4SMasahiro Yamadasingle-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 262 2c1f4f12SMasahiro Yamada 263 2042b548SMasahiro Yamadaconfig-build := 264 2042b548SMasahiro Yamadamixed-build := 265 2042b548SMasahiro Yamadaneed-config := 1 266 d7942413SMasahiro Yamadamay-sync-config := 1 267 394053f4SMasahiro Yamadasingle-build := 268 2c1f4f12SMasahiro Yamada 269 2c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 270 2c1f4f12SMasahiro Yamada ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 271 2042b548SMasahiro Yamada need-config := 272 2c1f4f12SMasahiro Yamada endif 273 2c1f4f12SMasahiro Yamadaendif 274 2c1f4f12SMasahiro Yamada 275 d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 276 d7942413SMasahiro Yamada ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 277 2042b548SMasahiro Yamada may-sync-config := 278 d7942413SMasahiro Yamada endif 279 d7942413SMasahiro Yamadaendif 280 d7942413SMasahiro Yamada 281 d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),) 282 2042b548SMasahiro Yamada may-sync-config := 283 d7942413SMasahiro Yamadaendif 284 d7942413SMasahiro Yamada 285 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 286 2c1f4f12SMasahiro Yamada ifneq ($(filter config %config,$(MAKECMDGOALS)),) 287 2042b548SMasahiro Yamada config-build := 1 288 2c1f4f12SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 289 2042b548SMasahiro Yamada mixed-build := 1 290 2c1f4f12SMasahiro Yamada endif 291 2c1f4f12SMasahiro Yamada endif 292 2c1f4f12SMasahiro Yamadaendif 293 22340a06SMasahiro Yamada 294 394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time 295 394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 296 394053f4SMasahiro Yamada single-build := 1 297 394053f4SMasahiro Yamada ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 298 394053f4SMasahiro Yamada mixed-build := 1 299 394053f4SMasahiro Yamada endif 300 394053f4SMasahiro Yamadaendif 301 394053f4SMasahiro Yamada 302 22340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc. 303 22340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 304 22340a06SMasahiro Yamada ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 305 2042b548SMasahiro Yamada mixed-build := 1 306 22340a06SMasahiro Yamada endif 307 22340a06SMasahiro Yamadaendif 308 22340a06SMasahiro Yamada 309 2c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one 310 2c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),) 311 2c1f4f12SMasahiro Yamada ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 312 2042b548SMasahiro Yamada mixed-build := 1 313 2c1f4f12SMasahiro Yamada endif 314 2c1f4f12SMasahiro Yamadaendif 315 2c1f4f12SMasahiro Yamada 316 2042b548SMasahiro Yamadaifdef mixed-build 317 2c1f4f12SMasahiro Yamada# =========================================================================== 318 2c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets). 319 2c1f4f12SMasahiro Yamada# Handle them one by one. 320 2c1f4f12SMasahiro Yamada 321 2c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 322 2c1f4f12SMasahiro Yamada 323 2c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 324 2c1f4f12SMasahiro Yamada @: 325 2c1f4f12SMasahiro Yamada 326 2c1f4f12SMasahiro Yamada__build_one_by_one: 327 2c1f4f12SMasahiro Yamada $(Q)set -e; \ 328 2c1f4f12SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 329 2c1f4f12SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 330 2c1f4f12SMasahiro Yamada done 331 2c1f4f12SMasahiro Yamada 332 2042b548SMasahiro Yamadaelse # !mixed-build 333 2c1f4f12SMasahiro Yamada 334 2c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include 335 2c1f4f12SMasahiro Yamada 336 2c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists) 337 2c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 338 2c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 339 2c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 340 2c1f4f12SMasahiro Yamada 341 b2d35fa5SAnders Roxellinclude scripts/subarch.include 342 1da177e4SLinus Torvalds 343 1da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 344 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 345 1da177e4SLinus Torvalds# 346 1da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 347 1da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 348 1da177e4SLinus Torvalds# ARCH can be set during invocation of make: 349 1da177e4SLinus Torvalds# make ARCH=ia64 350 1da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 351 1da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 352 1da177e4SLinus Torvalds 353 1da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 354 1da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 355 1da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 356 1da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 357 1da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 358 1da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 359 1da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 360 1da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 361 2331d1a6SSam RavnborgARCH ?= $(SUBARCH) 362 1da177e4SLinus Torvalds 363 1da177e4SLinus Torvalds# Architecture as present in compile.h 364 1da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 365 6752ed90SThomas GleixnerSRCARCH := $(ARCH) 366 1da177e4SLinus Torvalds 367 d746d647SSam Ravnborg# Additional ARCH settings for x86 368 d746d647SSam Ravnborgifeq ($(ARCH),i386) 369 d746d647SSam Ravnborg SRCARCH := x86 370 d746d647SSam Ravnborgendif 371 d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 372 d746d647SSam Ravnborg SRCARCH := x86 373 d746d647SSam Ravnborgendif 374 74b469f2SSam Ravnborg 375 5e538790SSam Ravnborg# Additional ARCH settings for sparc 376 e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 377 e69f58c0SNamhyung Kim SRCARCH := sparc 378 e69f58c0SNamhyung Kimendif 379 a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 380 5e538790SSam Ravnborg SRCARCH := sparc 381 a439fe51SSam Ravnborgendif 382 2fb9b1bdSSam Ravnborg 383 3cc000b5SPaul Mundt# Additional ARCH settings for sh 384 3cc000b5SPaul Mundtifeq ($(ARCH),sh64) 385 3cc000b5SPaul Mundt SRCARCH := sh 386 3cc000b5SPaul Mundtendif 387 3cc000b5SPaul Mundt 388 14cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 389 41263fc6SBen Gardinerexport KCONFIG_CONFIG 390 14cdd3c4SRoman Zippel 391 2a86f661SMasahiro Yamada# Default file for 'make defconfig'. This may be overridden by arch-Makefile. 392 2a86f661SMasahiro Yamadaexport KBUILD_DEFCONFIG := defconfig 393 2a86f661SMasahiro Yamada 394 1da177e4SLinus Torvalds# SHELL used by kbuild 395 858805b3SMasahiro YamadaCONFIG_SHELL := sh 396 1da177e4SLinus Torvalds 397 6d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 398 6d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 399 6d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 400 d7f14c66SUwe Kleine-König 401 1da177e4SLinus TorvaldsHOSTCC = gcc 402 1da177e4SLinus TorvaldsHOSTCXX = g++ 403 96f14fe7SLaura AbbottKBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 404 f92d19e0SLaura Abbott -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 405 f92d19e0SLaura Abbott $(HOSTCFLAGS) 406 *735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 407 f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 408 f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 409 1da177e4SLinus Torvalds 410 1da177e4SLinus Torvalds# Make variables (CC, etc...) 411 1da177e4SLinus TorvaldsAS = $(CROSS_COMPILE)as 412 1da177e4SLinus TorvaldsLD = $(CROSS_COMPILE)ld 413 1da177e4SLinus TorvaldsCC = $(CROSS_COMPILE)gcc 414 1da177e4SLinus TorvaldsCPP = $(CC) -E 415 1da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 416 1da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 417 1da177e4SLinus TorvaldsSTRIP = $(CROSS_COMPILE)strip 418 1da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 419 1da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 420 7bac9870SVasily GorbikOBJSIZE = $(CROSS_COMPILE)size 421 eefb8c12SDmitry GolovinREADELF = $(CROSS_COMPILE)readelf 422 e83b9f55SAndrii NakryikoPAHOLE = pahole 423 73a4f6dbSMasahiro YamadaLEX = flex 424 73a4f6dbSMasahiro YamadaYACC = bison 425 1da177e4SLinus TorvaldsAWK = awk 426 caa27b66SSam RavnborgINSTALLKERNEL := installkernel 427 1da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 428 1da177e4SLinus TorvaldsPERL = perl 429 011bf125SMasahiro YamadaPYTHON = python 430 e9781b52SMasahiro YamadaPYTHON3 = python3 431 1da177e4SLinus TorvaldsCHECK = sparse 432 858805b3SMasahiro YamadaBASH = bash 433 1da177e4SLinus Torvalds 434 80a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 435 6c49f359SLuc Van Oostenryck -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 436 0c22be07SDouglas AndersonNOSTDINC_FLAGS := 437 6588169dSSam RavnborgCFLAGS_MODULE = 438 6588169dSSam RavnborgAFLAGS_MODULE = 439 6588169dSSam RavnborgLDFLAGS_MODULE = 440 1da177e4SLinus TorvaldsCFLAGS_KERNEL = 441 1da177e4SLinus TorvaldsAFLAGS_KERNEL = 442 b36fad65SMichal MarekLDFLAGS_vmlinux = 443 1da177e4SLinus Torvalds 444 abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 445 abbf1590SDavid HowellsUSERINCLUDE := \ 446 9d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 447 9d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 448 abbf1590SDavid Howells -I$(srctree)/include/uapi \ 449 3308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 450 abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 451 abbf1590SDavid Howells 452 1da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 453 1da177e4SLinus Torvalds# Needed to be compatible with the O= option 454 abbf1590SDavid HowellsLINUXINCLUDE := \ 455 9d022c54SMasahiro Yamada -I$(srctree)/arch/$(SRCARCH)/include \ 456 9d022c54SMasahiro Yamada -I$(objtree)/arch/$(SRCARCH)/include/generated \ 457 051f278eSMasahiro Yamada $(if $(building_out_of_srctree),-I$(srctree)/include) \ 458 f8224f7fSMasahiro Yamada -I$(objtree)/include \ 459 f8224f7fSMasahiro Yamada $(USERINCLUDE) 460 1da177e4SLinus Torvalds 461 42a92bccSMasahiro YamadaKBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 462 eeb5687aSMasahiro YamadaKBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 463 42a92bccSMasahiro Yamada -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 464 b89f25eaSLuc Van Oostenryck -Werror=implicit-function-declaration -Werror=implicit-int \ 465 51b97e35SKirill A. Shutemov -Wno-format-security \ 466 433dc2ebSMasahiro Yamada -std=gnu89 467 433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__ 468 80c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 469 80c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 470 6588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 471 6588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 472 10df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE := 473 10df0638SMasahiro Yamadaexport KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds 474 d503ac53SMasahiro YamadaKBUILD_LDFLAGS := 475 433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS := 476 5241ab4cSMasahiro YamadaCLANG_FLAGS := 477 1da177e4SLinus Torvalds 478 858805b3SMasahiro Yamadaexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 479 eefb8c12SDmitry Golovinexport CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL 480 94f7345bSMasahiro Yamadaexport PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 481 7bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 482 1da177e4SLinus Torvalds 483 d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 484 0e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 485 0e410e15SAndrey Konovalovexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 486 222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 487 6588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 488 80c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 489 1da177e4SLinus Torvalds 490 1da177e4SLinus Torvalds# Files to ignore in find ... statements 491 1da177e4SLinus Torvalds 492 ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 493 ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 494 ae63b2d7SPrarit Bhargava -prune -o 495 450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 496 450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 497 1da177e4SLinus Torvalds 498 1da177e4SLinus Torvalds# =========================================================================== 499 1da177e4SLinus Torvalds# Rules shared between *config targets and build targets 500 1da177e4SLinus Torvalds 501 312a3d09SCao jin# Basic helpers built in scripts/basic/ 502 4f193362SPaul SmithPHONY += scripts_basic 503 1da177e4SLinus Torvaldsscripts_basic: 504 1da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 505 638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 506 1da177e4SLinus Torvalds 507 4f193362SPaul SmithPHONY += outputmakefile 508 e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean. 509 fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 510 fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 511 fd5f0cd6SJan Beulich# output directory. 512 3a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to 513 3a51ff34SVladimir Kondratiev# ignore whole output directory 514 1da177e4SLinus Torvaldsoutputmakefile: 515 051f278eSMasahiro Yamadaifdef building_out_of_srctree 516 e8e83a23SMasahiro Yamada $(Q)if [ -f $(srctree)/.config -o \ 517 e8e83a23SMasahiro Yamada -d $(srctree)/include/config -o \ 518 e8e83a23SMasahiro Yamada -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 519 e8e83a23SMasahiro Yamada echo >&2 "***"; \ 520 e8e83a23SMasahiro Yamada echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 521 e8e83a23SMasahiro Yamada echo >&2 "*** in $(abs_srctree)";\ 522 e8e83a23SMasahiro Yamada echo >&2 "***"; \ 523 e8e83a23SMasahiro Yamada false; \ 524 e8e83a23SMasahiro Yamada fi 525 92979997SAndi Kleen $(Q)ln -fsn $(srctree) source 526 4fd61277SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 527 156e7cbbSMasahiro Yamada $(Q)test -e .gitignore || \ 528 156e7cbbSMasahiro Yamada { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 529 fd5f0cd6SJan Beulichendif 530 1da177e4SLinus Torvalds 531 99516742SMasahiro Yamadaifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 532 ae6b289aSChris Friesifneq ($(CROSS_COMPILE),) 533 5241ab4cSMasahiro YamadaCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 534 ad15006cSNick DesaulniersGCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 535 238bcbc4SMasahiro YamadaCLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 536 ef8c4ed9SStefan AgnerGCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 537 ae6b289aSChris Friesendif 538 ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),) 539 238bcbc4SMasahiro YamadaCLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 540 ae6b289aSChris Friesendif 541 876a0600SNathan Chancellorifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) 542 238bcbc4SMasahiro YamadaCLANG_FLAGS += -no-integrated-as 543 876a0600SNathan Chancellorendif 544 589834b3SNathan ChancellorCLANG_FLAGS += -Werror=unknown-warning-option 545 238bcbc4SMasahiro YamadaKBUILD_CFLAGS += $(CLANG_FLAGS) 546 238bcbc4SMasahiro YamadaKBUILD_AFLAGS += $(CLANG_FLAGS) 547 3bd98050SJoel Stanleyexport CLANG_FLAGS 548 ae6b289aSChris Friesendif 549 ae6b289aSChris Fries 550 315bab4eSMasahiro Yamada# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 551 315bab4eSMasahiro Yamada# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 552 315bab4eSMasahiro Yamada# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 553 315bab4eSMasahiro Yamada# and from include/config/auto.conf.cmd to detect the compiler upgrade. 554 902a6898SMasahiro YamadaCC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 555 315bab4eSMasahiro Yamada 556 2042b548SMasahiro Yamadaifdef config-build 557 1da177e4SLinus Torvalds# =========================================================================== 558 1da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 559 1da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 560 1da177e4SLinus Torvalds 561 1da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 562 1da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 563 1da177e4SLinus Torvalds# used for 'make defconfig' 564 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 565 315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 566 1da177e4SLinus Torvalds 567 36de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE 568 31110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 569 31110ebbSSam Ravnborg 570 36de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE 571 1da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 572 1da177e4SLinus Torvalds 573 2042b548SMasahiro Yamadaelse #!config-build 574 1da177e4SLinus Torvalds# =========================================================================== 575 1da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 576 1da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 577 1da177e4SLinus Torvalds 578 2c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule 579 2c1f4f12SMasahiro Yamada# but instead _all depend on modules 580 2c1f4f12SMasahiro YamadaPHONY += all 581 2c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 582 2c1f4f12SMasahiro Yamada_all: all 583 2c1f4f12SMasahiro Yamadaelse 584 2c1f4f12SMasahiro Yamada_all: modules 585 2c1f4f12SMasahiro Yamadaendif 586 2c1f4f12SMasahiro Yamada 587 2c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both. 588 2c1f4f12SMasahiro Yamada# Normally, just do built-in. 589 2c1f4f12SMasahiro Yamada 590 2c1f4f12SMasahiro YamadaKBUILD_MODULES := 591 2c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1 592 2c1f4f12SMasahiro Yamada 593 2c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects. 594 2c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider 595 2c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to 596 2c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them. 597 2c1f4f12SMasahiro Yamada 598 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules) 599 2c1f4f12SMasahiro Yamada KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 600 2c1f4f12SMasahiro Yamadaendif 601 2c1f4f12SMasahiro Yamada 602 2c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules 603 2c1f4f12SMasahiro Yamada# in addition to whatever we do anyway. 604 2c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well 605 2c1f4f12SMasahiro Yamada 606 d85103acSMasahiro Yamadaifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),) 607 2c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 608 2c1f4f12SMasahiro Yamadaendif 609 2c1f4f12SMasahiro Yamada 610 2c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),) 611 2c1f4f12SMasahiro Yamada KBUILD_MODULES := 1 612 2c1f4f12SMasahiro Yamadaendif 613 2c1f4f12SMasahiro Yamada 614 2c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN 615 2c1f4f12SMasahiro Yamada 616 2042b548SMasahiro Yamadaifdef need-config 617 d93a18f2SMasahiro Yamadainclude include/config/auto.conf 618 d93a18f2SMasahiro Yamadaendif 619 d93a18f2SMasahiro Yamada 620 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 621 1da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 622 1da177e4SLinus Torvaldsinit-y := init/ 623 f96182e9SMasahiro Yamadadrivers-y := drivers/ sound/ 624 d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/ 625 1da177e4SLinus Torvaldsnet-y := net/ 626 1da177e4SLinus Torvaldslibs-y := lib/ 627 1da177e4SLinus Torvaldscore-y := usr/ 628 37d9fe47SFeng Wuvirt-y := virt/ 629 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 630 1da177e4SLinus Torvalds 631 315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the 632 315bab4eSMasahiro Yamada# command line. 633 315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules 634 315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets 635 315bab4eSMasahiro Yamadaall: vmlinux 636 315bab4eSMasahiro Yamada 637 315bab4eSMasahiro YamadaCFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 638 315bab4eSMasahiro Yamada $(call cc-option,-fno-tree-loop-im) \ 639 315bab4eSMasahiro Yamada $(call cc-disable-warning,maybe-uninitialized,) 640 5aadfdebSMasahiro Yamadaexport CFLAGS_GCOV 641 315bab4eSMasahiro Yamada 642 b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 643 b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER 644 b1f4ff74SPaulo Zanoni CC_FLAGS_FTRACE := -pg 645 b1f4ff74SPaulo Zanoniendif 646 b1f4ff74SPaulo Zanoni 647 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 648 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 649 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 650 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 651 669e06b1SMasahiro YamadaRETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 652 669e06b1SMasahiro YamadaRETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 653 669e06b1SMasahiro Yamadaexport RETPOLINE_CFLAGS 654 669e06b1SMasahiro Yamadaexport RETPOLINE_VDSO_CFLAGS 655 669e06b1SMasahiro Yamada 656 315bab4eSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 657 315bab4eSMasahiro Yamada 658 2042b548SMasahiro Yamadaifdef need-config 659 2042b548SMasahiro Yamadaifdef may-sync-config 660 315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 661 315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 662 315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there. 663 d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd 664 1da177e4SLinus Torvalds 665 05850719SMasahiro Yamada$(KCONFIG_CONFIG): 666 05850719SMasahiro Yamada @echo >&2 '***' 667 05850719SMasahiro Yamada @echo >&2 '*** Configuration file "$@" not found!' 668 05850719SMasahiro Yamada @echo >&2 '***' 669 05850719SMasahiro Yamada @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 670 05850719SMasahiro Yamada @echo >&2 '*** "make menuconfig" or "make xconfig").' 671 05850719SMasahiro Yamada @echo >&2 '***' 672 05850719SMasahiro Yamada @/bin/false 673 1da177e4SLinus Torvalds 674 61277981SUlf Magnusson# The actual configuration files used during the build are stored in 675 61277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than 676 61277981SUlf Magnusson# include/config/auto.conf (which mirrors .config). 677 9390dff6SMasahiro Yamada# 678 9390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick. 679 9390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets. 680 8b41fc44SMasahiro Yamada%/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG) 681 911a91c3SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 682 2042b548SMasahiro Yamadaelse # !may-sync-config 683 d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h 684 d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date. 685 d7942413SMasahiro Yamada# Use auto.conf to trigger the test 686 9ee4e336SSam RavnborgPHONY += include/config/auto.conf 687 9ee4e336SSam Ravnborg 688 9ee4e336SSam Ravnborginclude/config/auto.conf: 689 264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 690 5369f550SMichal Marek echo >&2; \ 691 5369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 692 5369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 693 5369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 694 5369f550SMichal Marek echo >&2 ; \ 695 9ee4e336SSam Ravnborg /bin/false) 696 9ee4e336SSam Ravnborg 697 d7942413SMasahiro Yamadaendif # may-sync-config 698 2042b548SMasahiro Yamadaendif # need-config 699 1da177e4SLinus Torvalds 700 a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 701 ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 702 bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 703 bd664f6bSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 704 6f303d60SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 705 a1c48bb1SGeert Uytterhoeven 706 15f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 707 a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 708 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 709 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -O3 710 15f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 711 15f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os 712 1da177e4SLinus Torvaldsendif 713 1da177e4SLinus Torvalds 714 b303c6dfSMasahiro Yamadaifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 715 b303c6dfSMasahiro YamadaKBUILD_CFLAGS += -Wno-maybe-uninitialized 716 b303c6dfSMasahiro Yamadaendif 717 a76bcf55SArnd Bergmann 718 69102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 719 69102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 720 b1112139SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 721 69102311SJiri Kosina 722 d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov 723 6b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins 724 6b90bd4bSEmese Revfy 725 1873e870SAndi Kleenifdef CONFIG_READABLE_ASM 726 1873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 727 1873e870SAndi Kleen# reorder blocks reorders the control in the function 728 1873e870SAndi Kleen# ipa clone creates specialized cloned functions 729 1873e870SAndi Kleen# partial inlining inlines only parts of functions 730 1873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 731 1873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 732 1873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 733 1873e870SAndi Kleenendif 734 1873e870SAndi Kleen 735 08f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 736 a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) 737 35bb5b1eSAndi Kleenendif 738 35bb5b1eSAndi Kleen 739 2a61f474SMasahiro Yamadastackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 740 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 741 050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 742 2a61f474SMasahiro Yamada 743 2a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y) 744 e06b8b98SSam Ravnborg 745 076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG 746 a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments 747 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-format-invalid-specifier 748 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu 749 cfe17c9bSMasahiro Yamada# Quiet clang warning: comparison of unsigned expression < 0 is always false 750 a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-tautological-compare 751 cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 752 cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names. 753 cfe17c9bSMasahiro Yamada# See modpost pattern 2 754 a1494304SMasahiro YamadaKBUILD_CFLAGS += -mno-global-merge 755 cfe17c9bSMasahiro Yamadaelse 756 cfe17c9bSMasahiro Yamada 757 cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build. 758 cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 759 9df3e7a7SMasahiro YamadaKBUILD_CFLAGS += -Wno-unused-but-set-variable 760 e2079e93SNathan Chancellor 761 e2079e93SNathan Chancellor# Warn about unmarked fall-throughs in switch statement. 762 e2079e93SNathan Chancellor# Disabled for clang while comment to attribute conversion happens and 763 e2079e93SNathan Chancellor# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 764 e2079e93SNathan ChancellorKBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 765 cfe17c9bSMasahiro Yamadaendif 766 cfe17c9bSMasahiro Yamada 767 0a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 768 1da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 769 a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 770 1da177e4SLinus Torvaldselse 771 7e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 772 7e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 773 7e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 774 7e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 775 7e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 776 7e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 777 a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 778 1da177e4SLinus Torvaldsendif 779 7e9501fdSRabin Vincentendif 780 1da177e4SLinus Torvalds 781 709a972eSKees Cook# Initialize all stack variables with a pattern, if desired. 782 709a972eSKees Cookifdef CONFIG_INIT_STACK_ALL 783 709a972eSKees CookKBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 784 709a972eSKees Cookendif 785 709a972eSKees Cook 786 1e88e415SMasahiro YamadaDEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 787 2062afb4SLinus Torvalds 788 1da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 789 866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 790 9d937444SMasahiro YamadaDEBUG_CFLAGS += -gsplit-dwarf 791 866ced95SAndi Kleenelse 792 1e88e415SMasahiro YamadaDEBUG_CFLAGS += -g 793 866ced95SAndi Kleenendif 794 2288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 795 1da177e4SLinus Torvaldsendif 796 bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 797 9d937444SMasahiro YamadaDEBUG_CFLAGS += -gdwarf-4 798 bfaf2dd3SAndi Kleenendif 799 1da177e4SLinus Torvalds 800 d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 801 1e88e415SMasahiro YamadaDEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 802 e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 803 d6f4ceb7SAndi Kleenendif 804 d6f4ceb7SAndi Kleen 805 1e88e415SMasahiro YamadaKBUILD_CFLAGS += $(DEBUG_CFLAGS) 806 1e88e415SMasahiro Yamadaexport DEBUG_CFLAGS 807 1e88e415SMasahiro Yamada 808 606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 809 07d04081SVasily Gorbikifdef CONFIG_FTRACE_MCOUNT_RECORD 810 07d04081SVasily Gorbik # gcc 5 supports generating the mcount tables directly 811 07d04081SVasily Gorbik ifeq ($(call cc-option-yn,-mrecord-mcount),y) 812 07d04081SVasily Gorbik CC_FLAGS_FTRACE += -mrecord-mcount 813 07d04081SVasily Gorbik export CC_USING_RECORD_MCOUNT := 1 814 a2546faeSSteven Rostedt endif 815 2f4df001SVasily Gorbik ifdef CONFIG_HAVE_NOP_MCOUNT 816 2f4df001SVasily Gorbik ifeq ($(call cc-option-yn, -mnop-mcount),y) 817 2f4df001SVasily Gorbik CC_FLAGS_FTRACE += -mnop-mcount 818 2f4df001SVasily Gorbik CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 819 2f4df001SVasily Gorbik endif 820 2f4df001SVasily Gorbik endif 821 07d04081SVasily Gorbikendif 822 a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 823 f28bc3c3SVasily Gorbik ifeq ($(call cc-option-yn, -mfentry),y) 824 f28bc3c3SVasily Gorbik CC_FLAGS_FTRACE += -mfentry 825 f28bc3c3SVasily Gorbik CC_FLAGS_USING += -DCC_USING_FENTRY 826 a2546faeSSteven Rostedt endif 827 f28bc3c3SVasily Gorbikendif 828 f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE 829 f28bc3c3SVasily GorbikKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 830 f28bc3c3SVasily GorbikKBUILD_AFLAGS += $(CC_FLAGS_USING) 831 72441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 832 cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 833 72441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 834 72441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 835 72441cb1SSteven Rostedt endif 836 72441cb1SSteven Rostedtendif 837 16444a8aSArnaldo Carvalho de Meloendif 838 16444a8aSArnaldo Carvalho de Melo 839 91341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 840 91341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 841 91341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 842 91341d4bSSam Ravnborgendif 843 91341d4bSSam Ravnborg 844 90ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 845 e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 846 e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections 847 90ad4052SMasahiro Yamadaendif 848 90ad4052SMasahiro Yamada 849 43bd3a95SMiroslav Benesifdef CONFIG_LIVEPATCH 850 43bd3a95SMiroslav BenesKBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 851 43bd3a95SMiroslav Benesendif 852 43bd3a95SMiroslav Benes 853 e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 854 e08d6de4SMasahiro YamadaNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 855 e8e69931SSam Ravnborg 856 1da177e4SLinus Torvalds# warn about C99 declaration after statement 857 a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement 858 1da177e4SLinus Torvalds 859 0bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 860 8289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla 861 0bb95f80SKees Cook 862 070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 863 fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign 864 1da177e4SLinus Torvalds 865 217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+ 866 217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 867 217c3e01SStephen Rothwell 868 fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 869 a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 870 d0115552SLinus Torvalds 871 87e0d4f0SDaniel Borkmann# clang sets -fmerge-all-constants by default as optimization, but this 872 87e0d4f0SDaniel Borkmann# is non-conforming behavior for C and in fact breaks the kernel, so we 873 87e0d4f0SDaniel Borkmann# need to disable it here generally. 874 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 875 87e0d4f0SDaniel Borkmann 876 87e0d4f0SDaniel Borkmann# for gcc -fno-merge-all-constants disables everything, but it is fine 877 87e0d4f0SDaniel Borkmann# to have actual conforming behavior enabled. 878 87e0d4f0SDaniel BorkmannKBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 879 87e0d4f0SDaniel Borkmann 880 3ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did) 881 3ce120b1SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 882 3ce120b1SLinus Torvalds 883 8f7f5c9fSAndi Kleen# conserve stack if available 884 8f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 885 8f7f5c9fSAndi Kleen 886 fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 887 fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 888 fe7c36c7SJosh Triplett 889 ea8daa7bSDaniel Wagner# enforce correct pointer usage 890 ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 891 ea8daa7bSDaniel Wagner 892 c834f0e8SKees Cook# Require designated initializers for all marked structures 893 c834f0e8SKees CookKBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 894 c834f0e8SKees Cook 895 a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree 896 a73619a8SMasahiro YamadaKBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 897 a73619a8SMasahiro Yamada 898 29be86d7SSeth Forshee# ensure -fcf-protection is disabled when using retpoline as it is 899 29be86d7SSeth Forshee# incompatible with -mindirect-branch=thunk-extern 900 29be86d7SSeth Forsheeifdef CONFIG_RETPOLINE 901 29be86d7SSeth ForsheeKBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 902 29be86d7SSeth Forsheeendif 903 29be86d7SSeth Forshee 904 a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan 905 a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn 906 c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan 907 a86fe353SMasahiro Yamada 908 8cc7af75SMasahiro Yamada# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 909 8cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS) 910 8cc7af75SMasahiro YamadaKBUILD_AFLAGS += $(KAFLAGS) 911 8cc7af75SMasahiro YamadaKBUILD_CFLAGS += $(KCFLAGS) 912 52bcc330SSam Ravnborg 913 89ff7131SMasahiro YamadaKBUILD_LDFLAGS_MODULE += --build-id 914 89ff7131SMasahiro YamadaLDFLAGS_vmlinux += --build-id 915 18991197SRoland McGrath 916 5d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 917 d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 918 5d7d18f5SDavid Howellsendif 919 5d7d18f5SDavid Howells 920 5cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y) 921 5cf896fbSPeter CollingbourneLDFLAGS_vmlinux += --pack-dyn-relocs=relr 922 5cf896fbSPeter Collingbourneendif 923 5cf896fbSPeter Collingbourne 924 80591e61SLuc Van Oostenryck# make the checker run with the right architecture 925 80591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH) 926 80591e61SLuc Van Oostenryck 927 14516765SLuc Van Oostenryck# insure the checker run with the right endianness 928 14516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 929 14516765SLuc Van Oostenryck 930 1f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size 931 1f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 932 1f2f01b1SLuc Van Oostenryck 933 1da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 934 1da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 935 1da177e4SLinus Torvalds# set in the environment 936 1da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 937 1da177e4SLinus Torvalds# this default value 938 1da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 939 1da177e4SLinus Torvalds 940 1da177e4SLinus Torvalds# 941 1da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 942 1da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 943 1da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 944 1da177e4SLinus Torvalds 945 1da177e4SLinus Torvalds# 946 f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 947 f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 948 f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 949 f4d4ffc0SJason Cooper# 950 f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 951 f4d4ffc0SJason Cooper 952 f4d4ffc0SJason Cooper# 953 1da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 954 1da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 955 070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 956 1da177e4SLinus Torvalds# 957 1da177e4SLinus Torvalds 958 df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 959 1da177e4SLinus Torvaldsexport MODLIB 960 1da177e4SLinus Torvalds 961 ac031f26STheodore Ts'o# 962 2ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 963 2ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 964 2ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 965 177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 966 2ea03891SSam Ravnborg 967 ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 968 ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 969 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 970 ac031f26STheodore Ts'oelse 971 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 972 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 973 ac031f26STheodore Ts'oelse 974 2ea03891SSam Ravnborgmod_strip_cmd = true 975 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 976 ac031f26STheodore Ts'oexport mod_strip_cmd 977 ac031f26STheodore Ts'o 978 beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 979 beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 980 beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ. 981 beb50df3SBertrand Jacquin 982 beb50df3SBertrand Jacquinmod_compress_cmd = true 983 beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS 984 beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_GZIP 985 3d1450d5SJason A. Donenfeld mod_compress_cmd = gzip -n -f 986 beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_GZIP 987 beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_XZ 988 3d1450d5SJason A. Donenfeld mod_compress_cmd = xz -f 989 beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_XZ 990 beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS 991 beb50df3SBertrand Jacquinexport mod_compress_cmd 992 beb50df3SBertrand Jacquin 993 d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 994 3ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY)) 995 3ee550f1SDavid Woodhouse 996 3ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 997 e2a666d5SRusty Russellelse 998 e2a666d5SRusty Russellmod_sign_cmd = true 999 e2a666d5SRusty Russellendif 1000 e2a666d5SRusty Russellexport mod_sign_cmd 1001 e2a666d5SRusty Russell 1002 056d28d1SRolf Eike BeerHOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 1003 056d28d1SRolf Eike Beer 1004 9f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION 1005 9f0c18aeSJosh Poimboeuf has_libelf := $(call try-run,\ 1006 056d28d1SRolf Eike Beer echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 1007 9f0c18aeSJosh Poimboeuf ifeq ($(has_libelf),1) 1008 9f0c18aeSJosh Poimboeuf objtool_target := tools/objtool FORCE 1009 9f0c18aeSJosh Poimboeuf else 1010 9f0c18aeSJosh Poimboeuf SKIP_STACK_VALIDATION := 1 1011 9f0c18aeSJosh Poimboeuf export SKIP_STACK_VALIDATION 1012 9f0c18aeSJosh Poimboeuf endif 1013 9f0c18aeSJosh Poimboeufendif 1014 9f0c18aeSJosh Poimboeuf 1015 e00d8880SMasahiro YamadaPHONY += prepare0 1016 e2a666d5SRusty Russell 1017 394053f4SMasahiro Yamadaexport MODORDER := $(extmod-prefix)modules.order 1018 bc35d4bdSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps 1019 47801c97SMasahiro Yamada 1020 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1021 cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 1022 1da177e4SLinus Torvalds 1023 1da177e4SLinus Torvaldsvmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 1024 1da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 1025 37d9fe47SFeng Wu $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 1026 1da177e4SLinus Torvalds 1027 1eaca4b9SMasahiro Yamadavmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 1028 1eaca4b9SMasahiro Yamada $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 1029 1eaca4b9SMasahiro Yamada $(drivers-) $(net-) $(libs-) $(virt-)))) 1030 1da177e4SLinus Torvalds 1031 c99f3918SMasahiro Yamadabuild-dirs := $(vmlinux-dirs) 1032 76cd306dSMasahiro Yamadaclean-dirs := $(vmlinux-alldirs) 1033 c99f3918SMasahiro Yamada 1034 f49821eeSNicholas Piggininit-y := $(patsubst %/, %/built-in.a, $(init-y)) 1035 f49821eeSNicholas Piggincore-y := $(patsubst %/, %/built-in.a, $(core-y)) 1036 f49821eeSNicholas Piggindrivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1037 f49821eeSNicholas Pigginnet-y := $(patsubst %/, %/built-in.a, $(net-y)) 1038 1da177e4SLinus Torvaldslibs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1039 f49821eeSNicholas Pigginlibs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 1040 f49821eeSNicholas Pigginvirt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 1041 1da177e4SLinus Torvalds 1042 1f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 1043 d151e971SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1044 d151e971SMasahiro Yamada $(drivers-y) $(net-y) $(virt-y) 1045 3a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1) 1046 95698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1047 1f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 1048 85f0ae7eSMasahiro Yamada# used by scripts/Makefile.package 1049 233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 1050 1da177e4SLinus Torvalds 1051 d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 1052 1da177e4SLinus Torvalds 1053 3fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied 1054 3fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive 1055 2441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 1056 c99f3918SMasahiro Yamadaautoksyms_recursive: descend modules.order 1057 ba79d401SNicolas Ferre $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1058 86556392SNicolas Pitre "$(MAKE) -f $(srctree)/Makefile vmlinux" 1059 2441e78bSNicolas Pitreendif 1060 23121ca2SNicolas Pitre 1061 1f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols, 1062 1f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are. 1063 1f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included) 1064 1f50b80aSMasahiro Yamadaifdef CONFIG_TRIM_UNUSED_KSYMS 1065 1f50b80aSMasahiro Yamada KBUILD_MODULES := 1 1066 1f50b80aSMasahiro Yamadaendif 1067 1f50b80aSMasahiro Yamada 1068 07a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1069 07a422bbSMasahiro Yamada 1070 88694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN $@ 1071 88694cffSQuentin Perret cmd_autoksyms_h = mkdir -p $(dir $@); \ 1072 88694cffSQuentin Perret $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ 1073 88694cffSQuentin Perret 1074 07a422bbSMasahiro Yamada$(autoksyms_h): 1075 88694cffSQuentin Perret $(call cmd,autoksyms_h) 1076 23121ca2SNicolas Pitre 1077 fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1078 fbe6e37dSNicholas Piggin 1079 fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 1080 fbe6e37dSNicholas Piggincmd_link-vmlinux = \ 1081 d503ac53SMasahiro Yamada $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1082 fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1083 2441e78bSNicolas Pitre 1084 3fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1085 1f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 1086 741f98feSSam Ravnborg 1087 392885eeSMasahiro Yamadatargets := vmlinux 1088 392885eeSMasahiro Yamada 1089 1da177e4SLinus Torvalds# The actual objects are generated when descending, 1090 1da177e4SLinus Torvalds# make sure no implicit rule kicks in 1091 c99f3918SMasahiro Yamada$(sort $(vmlinux-deps)): descend ; 1092 1da177e4SLinus Torvalds 1093 ba97df45SMasahiro Yamadafilechk_kernel.release = \ 1094 0d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1095 0d0e7718SMichal Marek 1096 83a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 1097 24512795SMasahiro Yamadainclude/config/kernel.release: FORCE 1098 0d0e7718SMichal Marek $(call filechk,kernel.release) 1099 cb58455cSSam Ravnborg 1100 d8821622SMasahiro Yamada# Additional helpers built in scripts/ 1101 d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice 1102 d8821622SMasahiro Yamada# in parallel 1103 d8821622SMasahiro YamadaPHONY += scripts 1104 60df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc 1105 d8821622SMasahiro Yamada $(Q)$(MAKE) $(build)=$(@) 1106 cb58455cSSam Ravnborg 1107 1da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 1108 5bb78269SSam Ravnborg# or the modules are listed in "prepare". 1109 5bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 1110 5bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 1111 5bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 1112 1da177e4SLinus Torvalds 1113 a5139fb3SMasahiro YamadaPHONY += prepare archprepare 1114 5bb78269SSam Ravnborg 1115 36de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 1116 30527cefSMasahiro Yamada asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h 1117 5bb78269SSam Ravnborg 1118 65bba042SMasahiro Yamadaprepare0: archprepare 1119 60df1aeeSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/mod 1120 8d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 1121 86feeaa8SSam Ravnborg 1122 1da177e4SLinus Torvalds# All the preparing.. 1123 b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool 1124 b9ab5ebbSJosh Poimboeuf 1125 2c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic 1126 7d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1127 7d0e5c20SMasahiro Yamada 1128 2c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic 1129 2c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic 1130 037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1131 037fc336SMasahiro Yamada generic=include/asm-generic 1132 2c1f4f12SMasahiro Yamadauapi-asm-generic: 1133 037fc336SMasahiro Yamada $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1134 037fc336SMasahiro Yamada generic=include/uapi/asm-generic 1135 2c1f4f12SMasahiro Yamada 1136 b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool 1137 3b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 1138 ef7cfd00SMasahiro Yamadaifeq ($(SKIP_STACK_VALIDATION),1) 1139 ef7cfd00SMasahiro Yamadaifdef CONFIG_UNWINDER_ORC 1140 ef7cfd00SMasahiro Yamada @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1141 ef7cfd00SMasahiro Yamada @false 1142 ef7cfd00SMasahiro Yamadaelse 1143 ef7cfd00SMasahiro Yamada @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1144 ef7cfd00SMasahiro Yamadaendif 1145 ef7cfd00SMasahiro Yamadaendif 1146 1da177e4SLinus Torvalds 1147 1da177e4SLinus Torvalds# Generate some files 1148 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1149 1da177e4SLinus Torvalds 1150 1da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 1151 1da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 1152 1da177e4SLinus Torvalds 1153 1da177e4SLinus Torvaldsuts_len := 64 1154 63104eecSSam Ravnborgdefine filechk_utsrelease.h 1155 1da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1156 1da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1157 1da177e4SLinus Torvalds exit 1; \ 1158 1da177e4SLinus Torvalds fi; \ 1159 ad774086SMasahiro Yamada echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1160 1da177e4SLinus Torvaldsendef 1161 1da177e4SLinus Torvalds 1162 63104eecSSam Ravnborgdefine filechk_version.h 1163 ad774086SMasahiro Yamada echo \#define LINUX_VERSION_CODE $(shell \ 1164 78d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1165 ad774086SMasahiro Yamada echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 1166 63104eecSSam Ravnborgendef 1167 63104eecSSam Ravnborg 1168 43fee2b2SMasahiro Yamada$(version_h): FORCE 1169 1da177e4SLinus Torvalds $(call filechk,version.h) 1170 223c24a7SMichal Marek $(Q)rm -f $(old_version_h) 1171 1da177e4SLinus Torvalds 1172 273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 1173 63104eecSSam Ravnborg $(call filechk,utsrelease.h) 1174 63104eecSSam Ravnborg 1175 179efcb4SVegard NossumPHONY += headerdep 1176 179efcb4SVegard Nossumheaderdep: 1177 9663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1178 9663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1179 179efcb4SVegard Nossum 1180 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1181 8d730cfbSDavid Woodhouse# Kernel headers 1182 8d730cfbSDavid Woodhouse 1183 e6883b18SSam Ravnborg#Default location for installed headers 1184 e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1185 e6883b18SSam Ravnborg 1186 59b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1187 59b2bd05SMasahiro Yamada cmd_headers_install = \ 1188 59b2bd05SMasahiro Yamada mkdir -p $(INSTALL_HDR_PATH); \ 1189 59b2bd05SMasahiro Yamada rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1190 59b2bd05SMasahiro Yamada usr/include $(INSTALL_HDR_PATH) 1191 6d716275SDavid Woodhouse 1192 8d730cfbSDavid WoodhousePHONY += headers_install 1193 59b2bd05SMasahiro Yamadaheaders_install: headers 1194 59b2bd05SMasahiro Yamada $(call cmd,headers_install) 1195 4f193362SPaul Smith 1196 1da177e4SLinus TorvaldsPHONY += archheaders archscripts 1197 1da177e4SLinus Torvalds 1198 a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1199 1da177e4SLinus Torvalds 1200 59b2bd05SMasahiro YamadaPHONY += headers 1201 59b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 1202 9d022c54SMasahiro Yamada $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1203 2fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 1204 d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=include/uapi 1205 d5470d14SMasahiro Yamada $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1206 1f85712eSMike Frysinger 1207 7ecaf069SMasahiro Yamada# Deprecated. It is no-op now. 1208 68475359SDavid WoodhousePHONY += headers_check 1209 7ecaf069SMasahiro Yamadaheaders_check: 1210 7ecaf069SMasahiro Yamada @: 1211 68475359SDavid Woodhouse 1212 e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL 1213 59b2bd05SMasahiro Yamadaprepare: headers 1214 e949f4c2SMasahiro Yamadaendif 1215 1da177e4SLinus Torvalds 1216 bdd7714bSMasahiro YamadaPHONY += scripts_unifdef 1217 bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic 1218 bdd7714bSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1219 bdd7714bSMasahiro Yamada 1220 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1221 5a5da78bSShuah Khan# Kernel selftest 1222 5a5da78bSShuah Khan 1223 5a5da78bSShuah KhanPHONY += kselftest 1224 5a5da78bSShuah Khankselftest: 1225 2bc84526SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1226 5a5da78bSShuah Khan 1227 17eac6c2SShuah Khankselftest-%: FORCE 1228 17eac6c2SShuah Khan $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1229 dcb825a9SWang Long 1230 3d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 1231 3d6dee7aSBamvor Jian Zhangkselftest-merge: 1232 3d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1233 6d3db46cSDan Rue $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1234 6d3db46cSDan Rue xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1235 3e4c6948SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1236 3d6dee7aSBamvor Jian Zhang 1237 5a5da78bSShuah Khan# --------------------------------------------------------------------------- 1238 37c8a5faSRob Herring# Devicetree files 1239 37c8a5faSRob Herring 1240 37c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1241 37c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts 1242 37c8a5faSRob Herringendif 1243 37c8a5faSRob Herring 1244 37c8a5faSRob Herringifneq ($(dtstree),) 1245 37c8a5faSRob Herring 1246 a5139fb3SMasahiro Yamada%.dtb: include/config/kernel.release scripts_dtc 1247 37c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1248 37c8a5faSRob Herring 1249 c473a8d0SMasahiro YamadaPHONY += dtbs dtbs_install dtbs_check 1250 b5154bf6SMasahiro Yamadadtbs: include/config/kernel.release scripts_dtc 1251 37c8a5faSRob Herring $(Q)$(MAKE) $(build)=$(dtstree) 1252 37c8a5faSRob Herring 1253 b5154bf6SMasahiro Yamadaifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1254 e10c4321SMasahiro Yamadaexport CHECK_DTBS=y 1255 b5154bf6SMasahiro Yamadadtbs: dt_binding_check 1256 b5154bf6SMasahiro Yamadaendif 1257 b5154bf6SMasahiro Yamada 1258 b5154bf6SMasahiro Yamadadtbs_check: dtbs 1259 4f0e3a57SRob Herring 1260 37c8a5faSRob Herringdtbs_install: 1261 2431f22aSMasahiro Yamada $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 1262 37c8a5faSRob Herring 1263 37c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE 1264 37c8a5faSRob Herringall: dtbs 1265 37c8a5faSRob Herringendif 1266 37c8a5faSRob Herring 1267 37c8a5faSRob Herringendif 1268 37c8a5faSRob Herring 1269 37c8a5faSRob HerringPHONY += scripts_dtc 1270 37c8a5faSRob Herringscripts_dtc: scripts_basic 1271 37c8a5faSRob Herring $(Q)$(MAKE) $(build)=scripts/dtc 1272 37c8a5faSRob Herring 1273 e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1274 e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y 1275 e10c4321SMasahiro Yamadaendif 1276 e10c4321SMasahiro Yamada 1277 c473a8d0SMasahiro YamadaPHONY += dt_binding_check 1278 4f0e3a57SRob Herringdt_binding_check: scripts_dtc 1279 4f0e3a57SRob Herring $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1280 4f0e3a57SRob Herring 1281 37c8a5faSRob Herring# --------------------------------------------------------------------------- 1282 1da177e4SLinus Torvalds# Modules 1283 1da177e4SLinus Torvalds 1284 1da177e4SLinus Torvaldsifdef CONFIG_MODULES 1285 1da177e4SLinus Torvalds 1286 1da177e4SLinus Torvalds# By default, build modules as well 1287 1da177e4SLinus Torvalds 1288 73d1393eSMichal Marekall: modules 1289 1da177e4SLinus Torvalds 1290 1da177e4SLinus Torvalds# Build modules 1291 551559e1STejun Heo# 1292 551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1293 551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1294 551559e1STejun Heo# using awk while concatenating to the final file. 1295 1da177e4SLinus Torvalds 1296 4f193362SPaul SmithPHONY += modules 1297 8b41fc44SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order 1298 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1299 3a48a919SMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 1300 1da177e4SLinus Torvalds 1301 c99f3918SMasahiro Yamadamodules.order: descend 1302 c99f3918SMasahiro Yamada $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1303 a6c36632SMichal Marek 1304 1da177e4SLinus Torvalds# Target to prepare building external modules 1305 4f193362SPaul SmithPHONY += modules_prepare 1306 059bc9fcSMasahiro Yamadamodules_prepare: prepare 1307 1da177e4SLinus Torvalds 1308 1da177e4SLinus Torvalds# Target to install modules 1309 4f193362SPaul SmithPHONY += modules_install 1310 1da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 1311 1da177e4SLinus Torvalds 1312 4f193362SPaul SmithPHONY += _modinst_ 1313 2da30e70SMichal Marek_modinst_: 1314 1da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 1315 1da177e4SLinus Torvalds @rm -f $(MODLIB)/source 1316 1da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 1317 8e9b4667SMasahiro Yamada @ln -s $(abspath $(srctree)) $(MODLIB)/source 1318 1da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1319 1da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 1320 7e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 1321 1da177e4SLinus Torvalds fi 1322 1bd9a468SMasahiro Yamada @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 1323 8b41fc44SMasahiro Yamada @cp -f modules.builtin $(MODLIB)/ 1324 898490c0SAlexey Gladkov @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1325 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1326 1da177e4SLinus Torvalds 1327 50a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 1328 1da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 1329 1da177e4SLinus Torvalds# boot script depmod is the master version. 1330 4f193362SPaul SmithPHONY += _modinst_post 1331 6d128e1eSLinus Torvalds_modinst_post: _modinst_ 1332 50a8ec31SSam Ravnborg $(call cmd,depmod) 1333 1da177e4SLinus Torvalds 1334 d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1335 d890f510SJosh BoyerPHONY += modules_sign 1336 d890f510SJosh Boyermodules_sign: 1337 d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1338 d890f510SJosh Boyerendif 1339 d890f510SJosh Boyer 1340 1da177e4SLinus Torvaldselse # CONFIG_MODULES 1341 1da177e4SLinus Torvalds 1342 1da177e4SLinus Torvalds# Modules not configured 1343 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1344 1da177e4SLinus Torvalds 1345 612e47ceSMasahiro YamadaPHONY += modules modules_install 1346 612e47ceSMasahiro Yamadamodules modules_install: 1347 5369f550SMichal Marek @echo >&2 1348 5369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 1349 5369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 1350 5369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 1351 5369f550SMichal Marek @echo >&2 1352 1da177e4SLinus Torvalds @exit 1 1353 1da177e4SLinus Torvalds 1354 1da177e4SLinus Torvaldsendif # CONFIG_MODULES 1355 1da177e4SLinus Torvalds 1356 1da177e4SLinus Torvalds### 1357 1da177e4SLinus Torvalds# Cleaning is done on three levels. 1358 1da177e4SLinus Torvalds# make clean Delete most generated files 1359 1da177e4SLinus Torvalds# Leave enough to build external modules 1360 1da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 1361 1da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 1362 1da177e4SLinus Torvalds 1363 1da177e4SLinus Torvalds# Directories & files removed with 'make clean' 1364 b7dca6ddSMasahiro YamadaCLEAN_DIRS += include/ksym 1365 8b41fc44SMasahiro YamadaCLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps 1366 1da177e4SLinus Torvalds 1367 1da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 1368 d6fc9fcbSMasahiro YamadaMRPROPER_DIRS += include/config include/generated \ 1369 46a63d4bSMasahiro Yamada arch/$(SRCARCH)/include/generated .tmp_objdiff \ 1370 46a63d4bSMasahiro Yamada debian/ snap/ tar-install/ 1371 278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \ 1372 46457133SMasahiro Yamada Module.symvers \ 1373 fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1374 fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 1375 46a63d4bSMasahiro Yamada signing_key.x509.signer vmlinux-gdb.py \ 1376 46a63d4bSMasahiro Yamada *.spec 1377 1da177e4SLinus Torvalds 1378 46457133SMasahiro Yamada# Directories & files removed with 'make distclean' 1379 46457133SMasahiro YamadaDISTCLEAN_DIRS += 1380 46457133SMasahiro YamadaDISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 1381 46457133SMasahiro Yamada 1382 1da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 1383 1da177e4SLinus Torvalds# 1384 1da177e4SLinus Torvaldsclean: rm-dirs := $(CLEAN_DIRS) 1385 1da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 1386 1da177e4SLinus Torvalds 1387 76cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean 1388 1da177e4SLinus Torvalds 1389 bd1ee804SPawel Mollvmlinuxclean: 1390 bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1391 fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1392 bd1ee804SPawel Moll 1393 bd1ee804SPawel Mollclean: archclean vmlinuxclean 1394 1da177e4SLinus Torvalds 1395 1da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 1396 1da177e4SLinus Torvalds# 1397 1da177e4SLinus Torvaldsmrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1398 1da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1399 cb43fb57SMauro Carvalho Chehabmrproper-dirs := $(addprefix _mrproper_,scripts) 1400 1da177e4SLinus Torvalds 1401 b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper 1402 1da177e4SLinus Torvalds$(mrproper-dirs): 1403 1da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1404 1da177e4SLinus Torvalds 1405 b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs) 1406 1da177e4SLinus Torvalds $(call cmd,rmdirs) 1407 1da177e4SLinus Torvalds $(call cmd,rmfiles) 1408 1da177e4SLinus Torvalds 1409 1da177e4SLinus Torvalds# distclean 1410 1da177e4SLinus Torvalds# 1411 46457133SMasahiro Yamadadistclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) 1412 46457133SMasahiro Yamadadistclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 1413 46457133SMasahiro Yamada 1414 4f193362SPaul SmithPHONY += distclean 1415 1da177e4SLinus Torvalds 1416 1da177e4SLinus Torvaldsdistclean: mrproper 1417 46457133SMasahiro Yamada $(call cmd,rmdirs) 1418 46457133SMasahiro Yamada $(call cmd,rmfiles) 1419 1da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 1420 1da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1421 f78271dfSMasahiro Yamada -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1422 f78271dfSMasahiro Yamada -o -name 'core' \) \ 1423 1da177e4SLinus Torvalds -type f -print | xargs rm -f 1424 1da177e4SLinus Torvalds 1425 1da177e4SLinus Torvalds 1426 1da177e4SLinus Torvalds# Packaging of the kernel to various formats 1427 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1428 1da177e4SLinus Torvalds 1429 bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1430 000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1431 031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 1432 000ec95fSMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1433 1da177e4SLinus Torvalds 1434 1da177e4SLinus Torvalds# Brief documentation of the typical targets used 1435 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1436 1da177e4SLinus Torvalds 1437 5dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1438 a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 1439 5dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1440 5dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 1441 1da177e4SLinus Torvalds 1442 fe69b420SMasahiro YamadaPHONY += help 1443 1da177e4SLinus Torvaldshelp: 1444 1da177e4SLinus Torvalds @echo 'Cleaning targets:' 1445 5ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 1446 5cc8d246SJesper Juhl @echo ' enough build support to build external modules' 1447 5ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 1448 5cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 1449 1da177e4SLinus Torvalds @echo '' 1450 1da177e4SLinus Torvalds @echo 'Configuration targets:' 1451 1da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1452 1da177e4SLinus Torvalds @echo '' 1453 1da177e4SLinus Torvalds @echo 'Other generic targets:' 1454 1da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 1455 1da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 1456 1da177e4SLinus Torvalds @echo '* modules - Build all modules' 1457 9cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1458 1da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 1459 40ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 1460 433db3e2SVinÃcius Tinti @echo ' dir/file.ll - Build the LLVM assembly file' 1461 433db3e2SVinÃcius Tinti @echo ' (requires compiler support for LLVM assembly generation)' 1462 62718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1463 62718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1464 155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1465 c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 1466 1da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 1467 1da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1468 f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 1469 3f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 1470 3f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1471 3f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 1472 2fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1473 59df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 1474 2fb9b1bdSSam Ravnborg echo '' 1475 31b8cc80SRandy Dunlap @echo 'Static analysers:' 1476 1da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 1477 1da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1478 aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1479 ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1480 295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 1481 74425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 1482 7f855fc8SMasahiro Yamada @echo ' coccicheck - Check with Coccinelle' 1483 74425eeeSNicolas Palix @echo '' 1484 eb8305aeSMatthias Maennich @echo 'Tools:' 1485 eb8305aeSMatthias Maennich @echo ' nsdeps - Generate missing symbol namespace dependencies' 1486 eb8305aeSMatthias Maennich @echo '' 1487 31b8cc80SRandy Dunlap @echo 'Kernel selftest:' 1488 5a5da78bSShuah Khan @echo ' kselftest - Build and run kernel selftest (run as root)' 1489 5a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 1490 5a5da78bSShuah Khan @echo ' running kselftest on it' 1491 dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 1492 bbfe63b6SRandy Dunlap @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1493 3d6dee7aSBamvor Jian Zhang @echo ' .config.' 1494 5a5da78bSShuah Khan @echo '' 1495 37c8a5faSRob Herring @$(if $(dtstree), \ 1496 37c8a5faSRob Herring echo 'Devicetree:'; \ 1497 37c8a5faSRob Herring echo '* dtbs - Build device tree blobs for enabled boards'; \ 1498 37c8a5faSRob Herring echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1499 7aa8dd91SStephen Boyd echo ' dt_binding_check - Validate device tree binding documents'; \ 1500 7aa8dd91SStephen Boyd echo ' dtbs_check - Validate device tree source files';\ 1501 37c8a5faSRob Herring echo '') 1502 37c8a5faSRob Herring 1503 31b8cc80SRandy Dunlap @echo 'Userspace tools targets:' 1504 31b8cc80SRandy Dunlap @echo ' use "make tools/help"' 1505 31b8cc80SRandy Dunlap @echo ' or "cd tools; make help"' 1506 31b8cc80SRandy Dunlap @echo '' 1507 1da177e4SLinus Torvalds @echo 'Kernel packaging:' 1508 000ec95fSMasahiro Yamada @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1509 1da177e4SLinus Torvalds @echo '' 1510 1da177e4SLinus Torvalds @echo 'Documentation targets:' 1511 cb43fb57SMauro Carvalho Chehab @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1512 1da177e4SLinus Torvalds @echo '' 1513 01dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 1514 1da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 1515 01dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 1516 1da177e4SLinus Torvalds @echo '' 1517 1da177e4SLinus Torvalds @$(if $(boards), \ 1518 1da177e4SLinus Torvalds $(foreach b, $(boards), \ 1519 4234448bSGeert Uytterhoeven printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1520 1da177e4SLinus Torvalds echo '') 1521 5dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 1522 5dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 1523 5dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1524 5dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 1525 5dffbe81SSegher Boessenkool echo '') 1526 1da177e4SLinus Torvalds 1527 1da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1528 45d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1529 1da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1530 a64c0440SGeert Uytterhoeven @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1531 a64c0440SGeert Uytterhoeven @echo ' (sparse by default)' 1532 701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1533 af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1534 e27128dbSMasahiro Yamada @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 1535 28bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 1536 28bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 1537 28bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1538 a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 1539 1da177e4SLinus Torvalds @echo '' 1540 1da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1541 1da177e4SLinus Torvalds @echo 'For further info see the ./README file' 1542 1da177e4SLinus Torvalds 1543 1da177e4SLinus Torvalds 1544 5dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 1545 5dffbe81SSegher Boessenkool 1546 5dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 1547 5dffbe81SSegher Boessenkool 1548 fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1549 5dffbe81SSegher Boessenkool 1550 5dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 1551 5dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 1552 5dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 1553 5dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 1554 5dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1555 5dffbe81SSegher Boessenkool echo '') 1556 5dffbe81SSegher Boessenkool 1557 5dffbe81SSegher Boessenkool 1558 1da177e4SLinus Torvalds# Documentation targets 1559 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1560 e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1561 e8939222SJani Nikula linkcheckdocs dochelp refcheckdocs 1562 22cba31bSJani NikulaPHONY += $(DOC_TARGETS) 1563 bc7b752aSMasahiro Yamada$(DOC_TARGETS): 1564 cb43fb57SMauro Carvalho Chehab $(Q)$(MAKE) $(build)=Documentation $@ 1565 1da177e4SLinus Torvalds 1566 67274c08SMasahiro Yamada# Misc 1567 67274c08SMasahiro Yamada# --------------------------------------------------------------------------- 1568 67274c08SMasahiro Yamada 1569 67274c08SMasahiro YamadaPHONY += scripts_gdb 1570 7a739ce5SMasahiro Yamadascripts_gdb: prepare0 1571 1e5ff84fSMasahiro Yamada $(Q)$(MAKE) $(build)=scripts/gdb 1572 8d2e5200SMasahiro Yamada $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1573 67274c08SMasahiro Yamada 1574 67274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS 1575 67274c08SMasahiro Yamadaall: scripts_gdb 1576 67274c08SMasahiro Yamadaendif 1577 67274c08SMasahiro Yamada 1578 1da177e4SLinus Torvaldselse # KBUILD_EXTMOD 1579 1da177e4SLinus Torvalds 1580 1da177e4SLinus Torvalds### 1581 1da177e4SLinus Torvalds# External module support. 1582 1da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 1583 1da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 1584 1da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 1585 1da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 1586 1da177e4SLinus Torvalds# be used. 1587 1da177e4SLinus Torvalds# 1588 1da177e4SLinus Torvalds# The following are the only valid targets when building external 1589 1da177e4SLinus Torvalds# modules. 1590 1da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 1591 1da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 1592 1da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 1593 1da177e4SLinus Torvalds# make M=dir modules_install 1594 070b98bfSSam Ravnborg# Install the modules built in the module directory 1595 1da177e4SLinus Torvalds# Assumes install directory is already created 1596 1da177e4SLinus Torvalds 1597 1da177e4SLinus Torvalds# We are always building modules 1598 1da177e4SLinus TorvaldsKBUILD_MODULES := 1 1599 1da177e4SLinus Torvalds 1600 4f193362SPaul SmithPHONY += $(objtree)/Module.symvers 1601 1da177e4SLinus Torvalds$(objtree)/Module.symvers: 1602 1da177e4SLinus Torvalds @test -e $(objtree)/Module.symvers || ( \ 1603 1da177e4SLinus Torvalds echo; \ 1604 1da177e4SLinus Torvalds echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1605 1da177e4SLinus Torvalds echo " is missing; modules will have no dependencies and modversions."; \ 1606 1da177e4SLinus Torvalds echo ) 1607 1da177e4SLinus Torvalds 1608 c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD) 1609 c99f3918SMasahiro YamadaPHONY += modules 1610 c99f3918SMasahiro Yamadamodules: descend $(objtree)/Module.symvers 1611 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1612 1da177e4SLinus Torvalds 1613 4f193362SPaul SmithPHONY += modules_install 1614 a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1615 a67dc21aSSam Ravnborg 1616 a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1617 4f193362SPaul SmithPHONY += _emodinst_ 1618 a67dc21aSSam Ravnborg_emodinst_: 1619 a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1620 b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1621 1da177e4SLinus Torvalds 1622 4f193362SPaul SmithPHONY += _emodinst_post 1623 a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1624 a67dc21aSSam Ravnborg $(call cmd,depmod) 1625 a67dc21aSSam Ravnborg 1626 76cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD) 1627 bc35d4bdSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps 1628 1da177e4SLinus Torvalds 1629 d4945049SMasahiro YamadaPHONY += / 1630 d4945049SMasahiro Yamada/: 1631 d4945049SMasahiro Yamada @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' 1632 d4945049SMasahiro Yamada 1633 fe69b420SMasahiro YamadaPHONY += help 1634 1da177e4SLinus Torvaldshelp: 1635 1da177e4SLinus Torvalds @echo ' Building external modules.' 1636 1da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1637 1da177e4SLinus Torvalds @echo '' 1638 1da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 1639 1da177e4SLinus Torvalds @echo ' modules_install - install the module' 1640 1da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 1641 1da177e4SLinus Torvalds @echo '' 1642 06300b21SSam Ravnborg 1643 059bc9fcSMasahiro YamadaPHONY += prepare 1644 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 1645 1da177e4SLinus Torvalds 1646 b1fbfcb4SMasahiro Yamada# Single targets 1647 b1fbfcb4SMasahiro Yamada# --------------------------------------------------------------------------- 1648 b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this: 1649 b1fbfcb4SMasahiro Yamada# 1650 b1fbfcb4SMasahiro Yamada# make foo/bar/baz.s 1651 b1fbfcb4SMasahiro Yamada# 1652 b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets' 1653 b1fbfcb4SMasahiro Yamada# 1654 b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this: 1655 b1fbfcb4SMasahiro Yamada# 1656 b1fbfcb4SMasahiro Yamada# make foo/bar/baz/ 1657 b1fbfcb4SMasahiro Yamada 1658 b1fbfcb4SMasahiro Yamadaifdef single-build 1659 b1fbfcb4SMasahiro Yamada 1660 b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed 1661 b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1662 b1fbfcb4SMasahiro Yamadasingle-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1663 b1fbfcb4SMasahiro Yamada 1664 b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost 1665 b1fbfcb4SMasahiro Yamada @: 1666 b1fbfcb4SMasahiro Yamada$(single-no-ko): descend 1667 b1fbfcb4SMasahiro Yamada @: 1668 b1fbfcb4SMasahiro Yamada 1669 b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),) 1670 b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid 1671 b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order. 1672 b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp 1673 b1fbfcb4SMasahiro Yamadaendif 1674 b1fbfcb4SMasahiro Yamada 1675 b1fbfcb4SMasahiro YamadaPHONY += single_modpost 1676 b1fbfcb4SMasahiro Yamadasingle_modpost: $(single-no-ko) 1677 b1fbfcb4SMasahiro Yamada $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 1678 b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1679 b1fbfcb4SMasahiro Yamada 1680 b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1 1681 b1fbfcb4SMasahiro Yamada 1682 b1fbfcb4SMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1683 b1fbfcb4SMasahiro Yamada 1684 b1fbfcb4SMasahiro Yamada# trim unrelated directories 1685 b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \ 1686 b1fbfcb4SMasahiro Yamada $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1687 b1fbfcb4SMasahiro Yamada 1688 b1fbfcb4SMasahiro Yamadaendif 1689 b1fbfcb4SMasahiro Yamada 1690 c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs) 1691 c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale 1692 c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running 1693 c99f3918SMasahiro Yamada# make menuconfig etc. 1694 c99f3918SMasahiro Yamada# Error messages still appears in the original language 1695 c99f3918SMasahiro YamadaPHONY += descend $(build-dirs) 1696 c99f3918SMasahiro Yamadadescend: $(build-dirs) 1697 c99f3918SMasahiro Yamada$(build-dirs): prepare 1698 b1fbfcb4SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ \ 1699 f566e1fbSMasahiro Yamada single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \ 1700 b1fbfcb4SMasahiro Yamada need-builtin=1 need-modorder=1 1701 c99f3918SMasahiro Yamada 1702 76cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs)) 1703 76cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean 1704 76cd306dSMasahiro Yamada$(clean-dirs): 1705 76cd306dSMasahiro Yamada $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1706 76cd306dSMasahiro Yamada 1707 88d7be03SMichal Marekclean: $(clean-dirs) 1708 88d7be03SMichal Marek $(call cmd,rmdirs) 1709 88d7be03SMichal Marek $(call cmd,rmfiles) 1710 43f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1711 ef46d9b3SMasahiro Yamada \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1712 4f0e3a57SRob Herring -o -name '*.ko.*' \ 1713 4f0e3a57SRob Herring -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1714 ef46d9b3SMasahiro Yamada -o -name '*.dwo' -o -name '*.lst' \ 1715 bbc55bdeSMasahiro Yamada -o -name '*.su' -o -name '*.mod' \ 1716 88d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1717 9a8dfb39SMasahiro Yamada -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1718 4fa8bc94SMasahiro Yamada -o -name '*.asn1.[ch]' \ 1719 88d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 1720 8b41fc44SMasahiro Yamada -o -name '.tmp_*.o.*' \ 1721 6b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 1722 433db3e2SVinÃcius Tinti -o -name '*.ll' \ 1723 88d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 1724 88d7be03SMichal Marek 1725 1da177e4SLinus Torvalds# Generate tags for editors 1726 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1727 a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1728 858805b3SMasahiro Yamada cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 1729 1da177e4SLinus Torvalds 1730 f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 1731 1da177e4SLinus Torvalds $(call cmd,tags) 1732 1da177e4SLinus Torvalds 1733 eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies 1734 eb8305aeSMatthias Maennich# --------------------------------------------------------------------------- 1735 eb8305aeSMatthias Maennich 1736 eb8305aeSMatthias MaennichPHONY += nsdeps 1737 bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1 1738 eb8305aeSMatthias Maennichnsdeps: modules 1739 bff9c62bSMasahiro Yamada $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1740 eb8305aeSMatthias Maennich 1741 1da177e4SLinus Torvalds# Scripts to check various things for consistency 1742 1da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1743 1da177e4SLinus Torvalds 1744 279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1745 279f3dd3SPeter Foley 1746 1da177e4SLinus Torvaldsincludecheck: 1747 436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 1748 1da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 1749 80007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1750 1da177e4SLinus Torvalds 1751 1da177e4SLinus Torvaldsversioncheck: 1752 2ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 1753 1da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 1754 80007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1755 1da177e4SLinus Torvalds 1756 74425eeeSNicolas Palixcoccicheck: 1757 858805b3SMasahiro Yamada $(Q)$(BASH) $(srctree)/scripts/$@ 1758 74425eeeSNicolas Palix 1759 1da177e4SLinus Torvaldsnamespacecheck: 1760 1da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 1761 1da177e4SLinus Torvalds 1762 295ac051SAdrian Bunkexport_report: 1763 295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1764 295ac051SAdrian Bunk 1765 c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1766 e3ccf6e3SJeff Dike 1767 011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1768 011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1769 011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1770 011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1771 011e3a9aSJeff Dikeifeq ($(ARCH), um) 1772 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1773 011e3a9aSJeff Dikeelse 1774 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1775 011e3a9aSJeff Dikeendif 1776 1da177e4SLinus Torvaldscheckstack: 1777 1da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1778 75dd4747SMasahiro Yamada $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1779 1da177e4SLinus Torvalds 1780 7b8ea53dSAmerigo Wangkernelrelease: 1781 7b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1782 01ab1788SAmerigo Wang 1783 cb58455cSSam Ravnborgkernelversion: 1784 2244cbd8SSam Ravnborg @echo $(KERNELVERSION) 1785 1da177e4SLinus Torvalds 1786 c398ff00SMike Marciniszynimage_name: 1787 c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1788 c398ff00SMike Marciniszyn 1789 ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1790 f47a23ceSMasahiro Yamada 1791 f47a23ceSMasahiro Yamadaifeq ($(quiet),silent_) 1792 f47a23ceSMasahiro Yamadatools_silent=s 1793 f47a23ceSMasahiro Yamadaendif 1794 f47a23ceSMasahiro Yamada 1795 ea01fa9fSBorislav Petkovtools/: FORCE 1796 bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1797 75dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1798 ea01fa9fSBorislav Petkov 1799 ea01fa9fSBorislav Petkovtools/%: FORCE 1800 bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1801 75dd4747SMasahiro Yamada $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1802 ea01fa9fSBorislav Petkov 1803 1da177e4SLinus Torvalds# FIXME Should go into a make.lib or something 1804 1da177e4SLinus Torvalds# =========================================================================== 1805 1da177e4SLinus Torvalds 1806 1da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1807 1da177e4SLinus Torvalds cmd_rmdirs = rm -rf $(rm-dirs) 1808 1da177e4SLinus Torvalds 1809 1da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1810 1da177e4SLinus Torvalds cmd_rmfiles = rm -f $(rm-files) 1811 1da177e4SLinus Torvalds 1812 bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 1813 50a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1814 569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1815 5a144a1aSMasahiro Yamada $(KERNELRELEASE) 1816 50a8ec31SSam Ravnborg 1817 392885eeSMasahiro Yamada# read saved command lines for existing targets 1818 392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 1819 1da177e4SLinus Torvalds 1820 b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1821 1da177e4SLinus Torvalds 1822 2042b548SMasahiro Yamadaendif # config-targets 1823 2042b548SMasahiro Yamadaendif # mixed-build 1824 688931a5SMasahiro Yamadaendif # need-sub-make 1825 1da177e4SLinus Torvalds 1826 4f193362SPaul SmithPHONY += FORCE 1827 1da177e4SLinus TorvaldsFORCE: 1828 4f193362SPaul Smith 1829 bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony. We keep that 1830 fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 1831 4f193362SPaul Smith.PHONY: $(PHONY) 1832