1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0 2 VERSION = 6 !! 2 VERSION = 5 3 PATCHLEVEL = 11 !! 3 PATCHLEVEL = 18 4 SUBLEVEL = 5 !! 4 SUBLEVEL = 19 5 EXTRAVERSION = 5 EXTRAVERSION = 6 NAME = Baby Opossum Posse !! 6 NAME = Superb Owl 7 7 8 # *DOCUMENTATION* 8 # *DOCUMENTATION* 9 # To see a list of typical targets execute "ma 9 # To see a list of typical targets execute "make help" 10 # More info can be located in ./README 10 # More info can be located in ./README 11 # Comments in this file are targeted only to t 11 # Comments in this file are targeted only to the developer, do not 12 # expect to learn how to build the kernel read 12 # expect to learn how to build the kernel reading this file. 13 13 14 ifeq ($(filter output-sync,$(.FEATURES)),) << 15 $(error GNU Make >= 4.0 is required. Your Make << 16 endif << 17 << 18 $(if $(filter __%, $(MAKECMDGOALS)), \ 14 $(if $(filter __%, $(MAKECMDGOALS)), \ 19 $(error targets prefixed with '__' are 15 $(error targets prefixed with '__' are only for internal use)) 20 16 21 # That's our default target when none is given 17 # That's our default target when none is given on the command line 22 PHONY := __all 18 PHONY := __all 23 __all: 19 __all: 24 20 25 # We are using a recursive build, so we need t 21 # We are using a recursive build, so we need to do a little thinking 26 # to get the ordering right. 22 # to get the ordering right. 27 # 23 # 28 # Most importantly: sub-Makefiles should only 24 # Most importantly: sub-Makefiles should only ever modify files in 29 # their own directory. If in some directory we 25 # their own directory. If in some directory we have a dependency on 30 # a file in another dir (which doesn't happen 26 # a file in another dir (which doesn't happen often, but it's often 31 # unavoidable when linking the built-in.a targ 27 # unavoidable when linking the built-in.a targets which finally 32 # turn into vmlinux), we will call a sub make 28 # turn into vmlinux), we will call a sub make in that other dir, and 33 # after that we are sure that everything which 29 # after that we are sure that everything which is in that other dir 34 # is now up to date. 30 # is now up to date. 35 # 31 # 36 # The only cases where we need to modify files 32 # The only cases where we need to modify files which have global 37 # effects are thus separated out and done befo 33 # effects are thus separated out and done before the recursive 38 # descending is started. They are now explicit 34 # descending is started. They are now explicitly listed as the 39 # prepare rule. 35 # prepare rule. 40 36 41 this-makefile := $(lastword $(MAKEFILE_LIST)) << 42 abs_srctree := $(realpath $(dir $(this-makefil << 43 abs_objtree := $(CURDIR) << 44 << 45 ifneq ($(sub_make_done),1) 37 ifneq ($(sub_make_done),1) 46 38 47 # Do not use make's built-in rules and variabl 39 # Do not use make's built-in rules and variables 48 # (this increases performance and avoids hard- 40 # (this increases performance and avoids hard-to-debug behaviour) 49 MAKEFLAGS += -rR 41 MAKEFLAGS += -rR 50 42 51 # Avoid funny character set dependencies 43 # Avoid funny character set dependencies 52 unexport LC_ALL 44 unexport LC_ALL 53 LC_COLLATE=C 45 LC_COLLATE=C 54 LC_NUMERIC=C 46 LC_NUMERIC=C 55 export LC_COLLATE LC_NUMERIC 47 export LC_COLLATE LC_NUMERIC 56 48 57 # Avoid interference with shell env settings 49 # Avoid interference with shell env settings 58 unexport GREP_OPTIONS 50 unexport GREP_OPTIONS 59 51 60 # Beautify output 52 # Beautify output 61 # -------------------------------------------- 53 # --------------------------------------------------------------------------- 62 # 54 # 63 # Most of build commands in Kbuild start with !! 55 # Normally, we echo the whole command before executing it. By making 64 # "quiet_cmd_*". If defined, the short log is !! 56 # that echo $($(quiet)$(cmd)), we now have the possibility to set 65 # that command is printed by default. !! 57 # $(quiet) to choose other forms of output instead, e.g. 66 # !! 58 # 67 # e.g.) !! 59 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 68 # quiet_cmd_depmod = DEPMOD $(MODLIB) !! 60 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 69 # cmd_depmod = $(srctree)/scripts/dep !! 61 # >> 62 # If $(quiet) is empty, the whole command will be printed. >> 63 # If it is set to "quiet_", only the short version will be printed. >> 64 # If it is set to "silent_", nothing will be printed at all, since >> 65 # the variable $(silent_cmd_cc_o_c) doesn't exist. 70 # 66 # 71 # A simple variant is to prefix commands with 67 # A simple variant is to prefix commands with $(Q) - that's useful 72 # for commands that shall be hidden in non-ver 68 # for commands that shall be hidden in non-verbose mode. 73 # 69 # 74 # $(Q)$(MAKE) $(build)=scripts/basic !! 70 # $(Q)ln $@ :< 75 # 71 # 76 # If KBUILD_VERBOSE contains 1, the whole comm !! 72 # If KBUILD_VERBOSE equals 0 then the above command will be hidden. 77 # If KBUILD_VERBOSE contains 2, the reason for !! 73 # If KBUILD_VERBOSE equals 1 then the above command is displayed. >> 74 # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 78 # 75 # 79 # To put more focus on warnings, be less verbo 76 # To put more focus on warnings, be less verbose as default 80 # Use 'make V=1' to see the full commands 77 # Use 'make V=1' to see the full commands 81 78 82 ifeq ("$(origin V)", "command line") 79 ifeq ("$(origin V)", "command line") 83 KBUILD_VERBOSE = $(V) 80 KBUILD_VERBOSE = $(V) 84 endif 81 endif >> 82 ifndef KBUILD_VERBOSE >> 83 KBUILD_VERBOSE = 0 >> 84 endif 85 85 86 quiet = quiet_ !! 86 ifeq ($(KBUILD_VERBOSE),1) 87 Q = @ << 88 << 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) << 90 quiet = 87 quiet = 91 Q = 88 Q = >> 89 else >> 90 quiet=quiet_ >> 91 Q = @ 92 endif 92 endif 93 93 94 # If the user is running make -s (silent mode) 94 # If the user is running make -s (silent mode), suppress echoing of 95 # commands 95 # commands 96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !! 96 97 quiet=silent_ !! 97 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 98 override KBUILD_VERBOSE := !! 98 quiet=silent_ >> 99 KBUILD_VERBOSE = 0 99 endif 100 endif 100 101 101 export quiet Q KBUILD_VERBOSE 102 export quiet Q KBUILD_VERBOSE 102 103 103 # Call a source code checker (by default, "spa 104 # Call a source code checker (by default, "sparse") as part of the 104 # C compilation. 105 # C compilation. 105 # 106 # 106 # Use 'make C=1' to enable checking of only re 107 # Use 'make C=1' to enable checking of only re-compiled files. 107 # Use 'make C=2' to enable checking of *all* s 108 # Use 'make C=2' to enable checking of *all* source files, regardless 108 # of whether they are re-compiled or not. 109 # of whether they are re-compiled or not. 109 # 110 # 110 # See the file "Documentation/dev-tools/sparse 111 # See the file "Documentation/dev-tools/sparse.rst" for more details, 111 # including where to get the "sparse" utility. 112 # including where to get the "sparse" utility. 112 113 113 ifeq ("$(origin C)", "command line") 114 ifeq ("$(origin C)", "command line") 114 KBUILD_CHECKSRC = $(C) 115 KBUILD_CHECKSRC = $(C) 115 endif 116 endif 116 ifndef KBUILD_CHECKSRC 117 ifndef KBUILD_CHECKSRC 117 KBUILD_CHECKSRC = 0 118 KBUILD_CHECKSRC = 0 118 endif 119 endif 119 120 120 export KBUILD_CHECKSRC 121 export KBUILD_CHECKSRC 121 122 122 # Enable "clippy" (a linter) as part of the Ru << 123 # << 124 # Use 'make CLIPPY=1' to enable it. << 125 ifeq ("$(origin CLIPPY)", "command line") << 126 KBUILD_CLIPPY := $(CLIPPY) << 127 endif << 128 << 129 export KBUILD_CLIPPY << 130 << 131 # Use make M=dir or set the environment variab 123 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 132 # directory of external module to build. Setti 124 # directory of external module to build. Setting M= takes precedence. 133 ifeq ("$(origin M)", "command line") 125 ifeq ("$(origin M)", "command line") 134 KBUILD_EXTMOD := $(M) 126 KBUILD_EXTMOD := $(M) 135 endif 127 endif 136 128 137 $(if $(word 2, $(KBUILD_EXTMOD)), \ 129 $(if $(word 2, $(KBUILD_EXTMOD)), \ 138 $(error building multiple external mod 130 $(error building multiple external modules is not supported)) 139 131 140 $(foreach x, % :, $(if $(findstring $x, $(KBUI << 141 $(error module directory path cannot c << 142 << 143 # Remove trailing slashes 132 # Remove trailing slashes 144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) 133 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) 145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM 134 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) 146 endif 135 endif 147 136 148 export KBUILD_EXTMOD 137 export KBUILD_EXTMOD 149 138 150 # backward compatibility << 151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC << 152 << 153 ifeq ("$(origin W)", "command line") << 154 KBUILD_EXTRA_WARN := $(W) << 155 endif << 156 << 157 export KBUILD_EXTRA_WARN << 158 << 159 # Kbuild will save output files in the current 139 # Kbuild will save output files in the current working directory. 160 # This does not need to match to the root of t 140 # This does not need to match to the root of the kernel source tree. 161 # 141 # 162 # For example, you can do this: 142 # For example, you can do this: 163 # 143 # 164 # cd /dir/to/store/output/files; make -f /dir 144 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 165 # 145 # 166 # If you want to save output files in a differ 146 # If you want to save output files in a different location, there are 167 # two syntaxes to specify it. 147 # two syntaxes to specify it. 168 # 148 # 169 # 1) O= 149 # 1) O= 170 # Use "make O=dir/to/store/output/files/" 150 # Use "make O=dir/to/store/output/files/" 171 # 151 # 172 # 2) Set KBUILD_OUTPUT 152 # 2) Set KBUILD_OUTPUT 173 # Set the environment variable KBUILD_OUTPUT t 153 # Set the environment variable KBUILD_OUTPUT to point to the output directory. 174 # export KBUILD_OUTPUT=dir/to/store/output/fil 154 # export KBUILD_OUTPUT=dir/to/store/output/files/; make 175 # 155 # 176 # The O= assignment takes precedence over the 156 # The O= assignment takes precedence over the KBUILD_OUTPUT environment 177 # variable. 157 # variable. 178 158 179 # Do we want to change the working directory? 159 # Do we want to change the working directory? 180 ifeq ("$(origin O)", "command line") 160 ifeq ("$(origin O)", "command line") 181 KBUILD_OUTPUT := $(O) 161 KBUILD_OUTPUT := $(O) 182 endif 162 endif 183 163 184 ifneq ($(KBUILD_OUTPUT),) 164 ifneq ($(KBUILD_OUTPUT),) 185 # $(realpath ...) gets empty if the path does !! 165 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 186 $(shell mkdir -p "$(KBUILD_OUTPUT)") !! 166 # expand a shell special character '~'. We use a somewhat tedious way here. >> 167 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) >> 168 $(if $(abs_objtree),, \ >> 169 $(error failed to create output directory "$(KBUILD_OUTPUT)")) >> 170 187 # $(realpath ...) resolves symlinks 171 # $(realpath ...) resolves symlinks 188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) !! 172 abs_objtree := $(realpath $(abs_objtree)) 189 $(if $(abs_objtree),,$(error failed to create !! 173 else >> 174 abs_objtree := $(CURDIR) 190 endif # ifneq ($(KBUILD_OUTPUT),) 175 endif # ifneq ($(KBUILD_OUTPUT),) 191 176 192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 177 ifeq ($(abs_objtree),$(CURDIR)) 193 $(error source directory cannot contain spaces !! 178 # Suppress "Entering directory ..." unless we are changing the work directory. >> 179 MAKEFLAGS += --no-print-directory >> 180 else >> 181 need-sub-make := 1 194 endif 182 endif 195 183 196 export sub_make_done := 1 !! 184 this-makefile := $(lastword $(MAKEFILE_LIST)) >> 185 abs_srctree := $(realpath $(dir $(this-makefile))) 197 186 198 endif # sub_make_done !! 187 ifneq ($(words $(subst :, ,$(abs_srctree))), 1) >> 188 $(error source directory cannot contain spaces or colons) >> 189 endif 199 190 200 ifeq ($(abs_objtree),$(CURDIR)) !! 191 ifneq ($(abs_srctree),$(abs_objtree)) 201 # Suppress "Entering directory ..." if we are !! 192 # Look for make include files relative to root of kernel src 202 no-print-directory := --no-print-directory !! 193 # 203 else !! 194 # --included-dir is added for backward compatibility, but you should not rely on 204 # Recursion to show "Entering directory ..." !! 195 # it. Please add $(srctree)/ prefix to include Makefiles in the source tree. 205 need-sub-make := 1 !! 196 MAKEFLAGS += --include-dir=$(abs_srctree) 206 endif 197 endif 207 198 208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 199 ifneq ($(filter 3.%,$(MAKE_VERSION)),) 209 # If --no-print-directory is unset, recurse on !! 200 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 210 # You may end up recursing into __sub-make twi !! 201 # We need to invoke sub-make to avoid implicit rules in the top Makefile. 211 # behavior change in GNU Make 4.4.1. << 212 need-sub-make := 1 202 need-sub-make := 1 >> 203 # Cancel implicit rules for this Makefile. >> 204 $(this-makefile): ; 213 endif 205 endif 214 206 >> 207 export abs_srctree abs_objtree >> 208 export sub_make_done := 1 >> 209 215 ifeq ($(need-sub-make),1) 210 ifeq ($(need-sub-make),1) 216 211 217 PHONY += $(MAKECMDGOALS) __sub-make 212 PHONY += $(MAKECMDGOALS) __sub-make 218 213 219 $(filter-out $(this-makefile), $(MAKECMDGOALS) 214 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 220 @: 215 @: 221 216 222 # Invoke a second make in the output directory 217 # Invoke a second make in the output directory, passing relevant variables 223 __sub-make: 218 __sub-make: 224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 219 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 225 -f $(abs_srctree)/Makefile $(MAKECMDGO << 226 220 227 else # need-sub-make !! 221 endif # need-sub-make >> 222 endif # sub_make_done 228 223 229 # We process the rest of the Makefile if this 224 # We process the rest of the Makefile if this is the final invocation of make >> 225 ifeq ($(need-sub-make),) >> 226 >> 227 # Do not print "Entering directory ...", >> 228 # but we want to display it when entering to the output directory >> 229 # so that IDEs/editors are able to understand relative filenames. >> 230 MAKEFLAGS += --no-print-directory 230 231 231 ifeq ($(abs_srctree),$(abs_objtree)) 232 ifeq ($(abs_srctree),$(abs_objtree)) 232 # building in the source tree 233 # building in the source tree 233 srctree := . 234 srctree := . 234 building_out_of_srctree := 235 building_out_of_srctree := 235 else 236 else 236 ifeq ($(abs_srctree)/,$(dir $(abs_objt 237 ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 237 # building in a subdirectory o 238 # building in a subdirectory of the source tree 238 srctree := .. 239 srctree := .. 239 else 240 else 240 srctree := $(abs_srctree) 241 srctree := $(abs_srctree) 241 endif 242 endif 242 building_out_of_srctree := 1 243 building_out_of_srctree := 1 243 endif 244 endif 244 245 245 ifneq ($(KBUILD_ABS_SRCTREE),) 246 ifneq ($(KBUILD_ABS_SRCTREE),) 246 srctree := $(abs_srctree) 247 srctree := $(abs_srctree) 247 endif 248 endif 248 249 249 objtree := . 250 objtree := . 250 << 251 VPATH := << 252 << 253 ifeq ($(KBUILD_EXTMOD),) << 254 ifdef building_out_of_srctree << 255 VPATH := $(srctree) 251 VPATH := $(srctree) 256 endif << 257 endif << 258 252 259 export building_out_of_srctree srctree objtree 253 export building_out_of_srctree srctree objtree VPATH 260 254 261 # To make sure we do not include .config for a 255 # To make sure we do not include .config for any of the *config targets 262 # catch them early, and hand them over to scri 256 # catch them early, and hand them over to scripts/kconfig/Makefile 263 # It is allowed to specify more targets when c 257 # It is allowed to specify more targets when calling make, including 264 # mixing *config targets and build targets. 258 # mixing *config targets and build targets. 265 # For example 'make oldconfig all'. 259 # For example 'make oldconfig all'. 266 # Detect when mixed targets is specified, and 260 # Detect when mixed targets is specified, and make a second invocation 267 # of make so .config is not included in this c 261 # of make so .config is not included in this case either (for *config). 268 262 269 version_h := include/generated/uapi/linux/vers 263 version_h := include/generated/uapi/linux/version.h 270 264 271 clean-targets := %clean mrproper cleandocs 265 clean-targets := %clean mrproper cleandocs 272 no-dot-config-targets := $(clean-targets) \ 266 no-dot-config-targets := $(clean-targets) \ 273 cscope gtags TAGS tag 267 cscope gtags TAGS tags help% %docs check% coccicheck \ 274 $(version_h) headers 268 $(version_h) headers headers_% archheaders archscripts \ 275 %asm-generic kernelve 269 %asm-generic kernelversion %src-pkg dt_binding_check \ 276 outputmakefile rustav !! 270 outputmakefile 277 no-sync-config-targets := $(no-dot-config-targ !! 271 # Installation targets should not require compiler. Unfortunately, vdso_install >> 272 # is an exception where build artifacts may be updated. This must be fixed. >> 273 no-compiler-targets := $(no-dot-config-targets) install dtbs_install \ >> 274 headers_install modules_install kernelrelease image_name >> 275 no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ 278 image_name 276 image_name 279 single-targets := %.a %.i %.ko %.lds %.ll %.ls !! 277 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 280 278 281 config-build := 279 config-build := 282 mixed-build := 280 mixed-build := 283 need-config := 1 281 need-config := 1 >> 282 need-compiler := 1 284 may-sync-config := 1 283 may-sync-config := 1 285 single-build := 284 single-build := 286 285 287 ifneq ($(filter $(no-dot-config-targets), $(MA 286 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 288 ifeq ($(filter-out $(no-dot-config-targets !! 287 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 289 need-config := !! 288 need-config := 290 endif !! 289 endif 291 endif 290 endif 292 291 293 ifneq ($(filter $(no-sync-config-targets), $(M !! 292 ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) 294 ifeq ($(filter-out $(no-sync-config-target !! 293 ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) 295 may-sync-config := !! 294 need-compiler := 296 endif !! 295 endif 297 endif 296 endif 298 297 299 need-compiler := $(may-sync-config) !! 298 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) >> 299 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) >> 300 may-sync-config := >> 301 endif >> 302 endif 300 303 301 ifneq ($(KBUILD_EXTMOD),) 304 ifneq ($(KBUILD_EXTMOD),) 302 may-sync-config := !! 305 may-sync-config := 303 endif 306 endif 304 307 305 ifeq ($(KBUILD_EXTMOD),) 308 ifeq ($(KBUILD_EXTMOD),) 306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 309 ifneq ($(filter %config,$(MAKECMDGOALS)),) 307 config-build := 1 !! 310 config-build := 1 308 ifneq ($(words $(MAKECMDGOALS)),1) !! 311 ifneq ($(words $(MAKECMDGOALS)),1) 309 mixed-build := 1 !! 312 mixed-build := 1 >> 313 endif 310 endif 314 endif 311 endif << 312 endif 315 endif 313 316 314 # We cannot build single targets and the other 317 # We cannot build single targets and the others at the same time 315 ifneq ($(filter $(single-targets), $(MAKECMDGO 318 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 316 single-build := 1 !! 319 single-build := 1 317 ifneq ($(filter-out $(single-targets), $(M !! 320 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 318 mixed-build := 1 !! 321 mixed-build := 1 319 endif !! 322 endif 320 endif 323 endif 321 324 322 # For "make -j clean all", "make -j mrproper d 325 # For "make -j clean all", "make -j mrproper defconfig all", etc. 323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 326 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 324 ifneq ($(filter-out $(clean-targets),$(MAK !! 327 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 325 mixed-build := 1 !! 328 mixed-build := 1 326 endif !! 329 endif 327 endif 330 endif 328 331 329 # install and modules_install need also be pro 332 # install and modules_install need also be processed one by one 330 ifneq ($(filter install,$(MAKECMDGOALS)),) 333 ifneq ($(filter install,$(MAKECMDGOALS)),) 331 ifneq ($(filter modules_install,$(MAKECMDG !! 334 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 332 mixed-build := 1 !! 335 mixed-build := 1 333 endif !! 336 endif 334 endif 337 endif 335 338 336 ifdef mixed-build 339 ifdef mixed-build 337 # ============================================ 340 # =========================================================================== 338 # We're called with mixed targets (*config and 341 # We're called with mixed targets (*config and build targets). 339 # Handle them one by one. 342 # Handle them one by one. 340 343 341 PHONY += $(MAKECMDGOALS) __build_one_by_one 344 PHONY += $(MAKECMDGOALS) __build_one_by_one 342 345 343 $(MAKECMDGOALS): __build_one_by_one 346 $(MAKECMDGOALS): __build_one_by_one 344 @: 347 @: 345 348 346 __build_one_by_one: 349 __build_one_by_one: 347 $(Q)set -e; \ 350 $(Q)set -e; \ 348 for i in $(MAKECMDGOALS); do \ 351 for i in $(MAKECMDGOALS); do \ 349 $(MAKE) -f $(srctree)/Makefile 352 $(MAKE) -f $(srctree)/Makefile $$i; \ 350 done 353 done 351 354 352 else # !mixed-build 355 else # !mixed-build 353 356 354 include $(srctree)/scripts/Kbuild.include 357 include $(srctree)/scripts/Kbuild.include 355 358 356 # Read KERNELRELEASE from include/config/kerne 359 # Read KERNELRELEASE from include/config/kernel.release (if it exists) 357 KERNELRELEASE = $(call read-file, include/conf !! 360 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 361 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 362 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 360 363 361 include $(srctree)/scripts/subarch.include 364 include $(srctree)/scripts/subarch.include 362 365 363 # Cross compiling and selecting different set 366 # Cross compiling and selecting different set of gcc/bin-utils 364 # -------------------------------------------- 367 # --------------------------------------------------------------------------- 365 # 368 # 366 # When performing cross compilation for other 369 # When performing cross compilation for other architectures ARCH shall be set 367 # to the target architecture. (See arch/* for 370 # to the target architecture. (See arch/* for the possibilities). 368 # ARCH can be set during invocation of make: 371 # ARCH can be set during invocation of make: 369 # make ARCH=arm64 !! 372 # make ARCH=ia64 370 # Another way is to have ARCH set in the envir 373 # Another way is to have ARCH set in the environment. 371 # The default ARCH is the host where make is e 374 # The default ARCH is the host where make is executed. 372 375 373 # CROSS_COMPILE specify the prefix used for al 376 # CROSS_COMPILE specify the prefix used for all executables used 374 # during compilation. Only gcc and related bin 377 # during compilation. Only gcc and related bin-utils executables 375 # are prefixed with $(CROSS_COMPILE). 378 # are prefixed with $(CROSS_COMPILE). 376 # CROSS_COMPILE can be set on the command line 379 # CROSS_COMPILE can be set on the command line 377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 380 # make CROSS_COMPILE=ia64-linux- 378 # Alternatively CROSS_COMPILE can be set in th 381 # Alternatively CROSS_COMPILE can be set in the environment. 379 # Default value for CROSS_COMPILE is not to pr 382 # Default value for CROSS_COMPILE is not to prefix executables 380 # Note: Some architectures assign CROSS_COMPIL 383 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 381 ARCH ?= $(SUBARCH) 384 ARCH ?= $(SUBARCH) 382 385 383 # Architecture as present in compile.h 386 # Architecture as present in compile.h 384 UTS_MACHINE := $(ARCH) 387 UTS_MACHINE := $(ARCH) 385 SRCARCH := $(ARCH) 388 SRCARCH := $(ARCH) 386 389 387 # Additional ARCH settings for x86 390 # Additional ARCH settings for x86 388 ifeq ($(ARCH),i386) 391 ifeq ($(ARCH),i386) 389 SRCARCH := x86 392 SRCARCH := x86 390 endif 393 endif 391 ifeq ($(ARCH),x86_64) 394 ifeq ($(ARCH),x86_64) 392 SRCARCH := x86 395 SRCARCH := x86 393 endif 396 endif 394 397 395 # Additional ARCH settings for sparc 398 # Additional ARCH settings for sparc 396 ifeq ($(ARCH),sparc32) 399 ifeq ($(ARCH),sparc32) 397 SRCARCH := sparc 400 SRCARCH := sparc 398 endif 401 endif 399 ifeq ($(ARCH),sparc64) 402 ifeq ($(ARCH),sparc64) 400 SRCARCH := sparc 403 SRCARCH := sparc 401 endif 404 endif 402 405 403 # Additional ARCH settings for parisc 406 # Additional ARCH settings for parisc 404 ifeq ($(ARCH),parisc64) 407 ifeq ($(ARCH),parisc64) 405 SRCARCH := parisc 408 SRCARCH := parisc 406 endif 409 endif 407 410 408 export cross_compiling := 411 export cross_compiling := 409 ifneq ($(SRCARCH),$(SUBARCH)) 412 ifneq ($(SRCARCH),$(SUBARCH)) 410 cross_compiling := 1 413 cross_compiling := 1 411 endif 414 endif 412 415 413 KCONFIG_CONFIG ?= .config 416 KCONFIG_CONFIG ?= .config 414 export KCONFIG_CONFIG 417 export KCONFIG_CONFIG 415 418 416 # SHELL used by kbuild 419 # SHELL used by kbuild 417 CONFIG_SHELL := sh 420 CONFIG_SHELL := sh 418 421 419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 422 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 423 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 424 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 422 425 423 ifneq ($(LLVM),) 426 ifneq ($(LLVM),) 424 ifneq ($(filter %/,$(LLVM)),) 427 ifneq ($(filter %/,$(LLVM)),) 425 LLVM_PREFIX := $(LLVM) 428 LLVM_PREFIX := $(LLVM) 426 else ifneq ($(filter -%,$(LLVM)),) 429 else ifneq ($(filter -%,$(LLVM)),) 427 LLVM_SUFFIX := $(LLVM) 430 LLVM_SUFFIX := $(LLVM) 428 endif 431 endif 429 432 430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 433 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 434 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 432 else 435 else 433 HOSTCC = gcc 436 HOSTCC = gcc 434 HOSTCXX = g++ 437 HOSTCXX = g++ 435 endif 438 endif 436 HOSTRUSTC = rustc << 437 HOSTPKG_CONFIG = pkg-config << 438 439 439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto 440 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 440 -O2 -fomit-frame-poin !! 441 -O2 -fomit-frame-pointer -std=gnu11 \ >> 442 -Wdeclaration-after-statement 441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) 443 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) 442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) 444 KBUILD_USERLDFLAGS := $(USERLDFLAGS) 443 445 444 # These flags apply to all Rust code in the tr !! 446 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 445 # host programs. !! 447 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 446 export rust_common_flags := --edition=2021 \ << 447 -Zbinary_dep_depin << 448 -Astable_features << 449 -Dunsafe_op_in_uns << 450 -Dnon_ascii_idents << 451 -Wrust_2018_idioms << 452 -Wunreachable_pub << 453 -Wmissing_docs \ << 454 -Wrustdoc::missing << 455 -Wclippy::all \ << 456 -Wclippy::mut_mut << 457 -Wclippy::needless << 458 -Wclippy::needless << 459 -Wclippy::no_mangl << 460 -Wclippy::dbg_macr << 461 << 462 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS << 463 $(HOSTCFLAGS) -I $(srct << 464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF << 465 -I $(srctree)/scripts/i << 466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - << 467 -Zallow-features= $(HO << 468 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(H 448 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 449 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 470 450 471 # Make variables (CC, etc...) 451 # Make variables (CC, etc...) 472 CPP = $(CC) -E 452 CPP = $(CC) -E 473 ifneq ($(LLVM),) 453 ifneq ($(LLVM),) 474 CC = $(LLVM_PREFIX)clang$(LLVM_SU 454 CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S 455 LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ 456 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ 457 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( 458 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( 459 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 480 READELF = $(LLVM_PREFIX)llvm-readelf$( 460 READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL 461 STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 482 else 462 else 483 CC = $(CROSS_COMPILE)gcc 463 CC = $(CROSS_COMPILE)gcc 484 LD = $(CROSS_COMPILE)ld 464 LD = $(CROSS_COMPILE)ld 485 AR = $(CROSS_COMPILE)ar 465 AR = $(CROSS_COMPILE)ar 486 NM = $(CROSS_COMPILE)nm 466 NM = $(CROSS_COMPILE)nm 487 OBJCOPY = $(CROSS_COMPILE)objcopy 467 OBJCOPY = $(CROSS_COMPILE)objcopy 488 OBJDUMP = $(CROSS_COMPILE)objdump 468 OBJDUMP = $(CROSS_COMPILE)objdump 489 READELF = $(CROSS_COMPILE)readelf 469 READELF = $(CROSS_COMPILE)readelf 490 STRIP = $(CROSS_COMPILE)strip 470 STRIP = $(CROSS_COMPILE)strip 491 endif 471 endif 492 RUSTC = rustc << 493 RUSTDOC = rustdoc << 494 RUSTFMT = rustfmt << 495 CLIPPY_DRIVER = clippy-driver << 496 BINDGEN = bindgen << 497 PAHOLE = pahole 472 PAHOLE = pahole 498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve 473 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 499 LEX = flex 474 LEX = flex 500 YACC = bison 475 YACC = bison 501 AWK = awk 476 AWK = awk 502 INSTALLKERNEL := installkernel 477 INSTALLKERNEL := installkernel >> 478 DEPMOD = depmod 503 PERL = perl 479 PERL = perl 504 PYTHON3 = python3 480 PYTHON3 = python3 505 CHECK = sparse 481 CHECK = sparse 506 BASH = bash 482 BASH = bash 507 KGZIP = gzip 483 KGZIP = gzip 508 KBZIP2 = bzip2 484 KBZIP2 = bzip2 509 KLZOP = lzop 485 KLZOP = lzop 510 LZMA = lzma 486 LZMA = lzma 511 LZ4 = lz4c 487 LZ4 = lz4c 512 XZ = xz 488 XZ = xz 513 ZSTD = zstd 489 ZSTD = zstd 514 490 >> 491 PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) >> 492 515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 493 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 516 -Wbitwise -Wno-return-void - 494 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 517 NOSTDINC_FLAGS := 495 NOSTDINC_FLAGS := 518 CFLAGS_MODULE = 496 CFLAGS_MODULE = 519 RUSTFLAGS_MODULE = << 520 AFLAGS_MODULE = 497 AFLAGS_MODULE = 521 LDFLAGS_MODULE = 498 LDFLAGS_MODULE = 522 CFLAGS_KERNEL = 499 CFLAGS_KERNEL = 523 RUSTFLAGS_KERNEL = << 524 AFLAGS_KERNEL = 500 AFLAGS_KERNEL = 525 LDFLAGS_vmlinux = 501 LDFLAGS_vmlinux = 526 502 527 # Use USERINCLUDE when you must reference the 503 # Use USERINCLUDE when you must reference the UAPI directories only. 528 USERINCLUDE := \ 504 USERINCLUDE := \ 529 -I$(srctree)/arch/$(SRCARCH)/i 505 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 530 -I$(objtree)/arch/$(SRCARCH)/i 506 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 531 -I$(srctree)/include/uapi \ 507 -I$(srctree)/include/uapi \ 532 -I$(objtree)/include/generated 508 -I$(objtree)/include/generated/uapi \ 533 -include $(srctree)/include/li 509 -include $(srctree)/include/linux/compiler-version.h \ 534 -include $(srctree)/include/li 510 -include $(srctree)/include/linux/kconfig.h 535 511 536 # Use LINUXINCLUDE when you must reference the 512 # Use LINUXINCLUDE when you must reference the include/ directory. 537 # Needed to be compatible with the O= option 513 # Needed to be compatible with the O= option 538 LINUXINCLUDE := \ 514 LINUXINCLUDE := \ 539 -I$(srctree)/arch/$(SRCARCH)/i 515 -I$(srctree)/arch/$(SRCARCH)/include \ 540 -I$(objtree)/arch/$(SRCARCH)/i 516 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 541 $(if $(building_out_of_srctree 517 $(if $(building_out_of_srctree),-I$(srctree)/include) \ 542 -I$(objtree)/include \ 518 -I$(objtree)/include \ 543 $(USERINCLUDE) 519 $(USERINCLUDE) 544 520 545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 521 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 546 !! 522 KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 547 KBUILD_CFLAGS := !! 523 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 548 KBUILD_CFLAGS += -std=gnu11 !! 524 -Werror=implicit-function-declaration -Werror=implicit-int \ 549 KBUILD_CFLAGS += -fshort-wchar !! 525 -Werror=return-type -Wno-format-security \ 550 KBUILD_CFLAGS += -funsigned-char !! 526 -std=gnu11 551 KBUILD_CFLAGS += -fno-common << 552 KBUILD_CFLAGS += -fno-PIE << 553 KBUILD_CFLAGS += -fno-strict-aliasing << 554 << 555 KBUILD_CPPFLAGS := -D__KERNEL__ 527 KBUILD_CPPFLAGS := -D__KERNEL__ 556 KBUILD_RUSTFLAGS := $(rust_common_flags) \ << 557 -Cpanic=abort -Cembed-bitc << 558 -Cforce-unwind-tables=n -C << 559 -Csymbol-mangling-version= << 560 -Crelocation-model=static << 561 -Zfunction-sections=n \ << 562 -Wclippy::float_arithmetic << 563 << 564 KBUILD_AFLAGS_KERNEL := 528 KBUILD_AFLAGS_KERNEL := 565 KBUILD_CFLAGS_KERNEL := 529 KBUILD_CFLAGS_KERNEL := 566 KBUILD_RUSTFLAGS_KERNEL := << 567 KBUILD_AFLAGS_MODULE := -DMODULE 530 KBUILD_AFLAGS_MODULE := -DMODULE 568 KBUILD_CFLAGS_MODULE := -DMODULE 531 KBUILD_CFLAGS_MODULE := -DMODULE 569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE << 570 KBUILD_LDFLAGS_MODULE := 532 KBUILD_LDFLAGS_MODULE := 571 KBUILD_LDFLAGS := 533 KBUILD_LDFLAGS := 572 CLANG_FLAGS := 534 CLANG_FLAGS := 573 535 574 ifeq ($(KBUILD_CLIPPY),1) !! 536 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC 575 RUSTC_OR_CLIPPY_QUIET := CLIPPY << 576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) << 577 else << 578 RUSTC_OR_CLIPPY_QUIET := RUSTC << 579 RUSTC_OR_CLIPPY = $(RUSTC) << 580 endif << 581 << 582 ifdef RUST_LIB_SRC << 583 export RUST_LIB_SRC << 584 endif << 585 << 586 # Allows the usage of unstable features in sta << 587 export RUSTC_BOOTSTRAP := 1 << 588 << 589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K << 590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q << 591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS << 592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF 537 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ 538 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 539 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS 540 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 541 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 597 542 598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 543 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 544 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF << 601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 545 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 546 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 547 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL >> 548 export PAHOLE_FLAGS 604 549 605 # Files to ignore in find ... statements 550 # Files to ignore in find ... statements 606 551 607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 552 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 608 -name CVS -o -name . 553 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 609 -prune -o 554 -prune -o >> 555 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ >> 556 --exclude CVS --exclude .pc --exclude .hg --exclude .git 610 557 611 # ============================================ 558 # =========================================================================== 612 # Rules shared between *config targets and bui 559 # Rules shared between *config targets and build targets 613 560 614 # Basic helpers built in scripts/basic/ 561 # Basic helpers built in scripts/basic/ 615 PHONY += scripts_basic 562 PHONY += scripts_basic 616 scripts_basic: 563 scripts_basic: 617 $(Q)$(MAKE) $(build)=scripts/basic 564 $(Q)$(MAKE) $(build)=scripts/basic 618 565 619 PHONY += outputmakefile 566 PHONY += outputmakefile 620 ifdef building_out_of_srctree 567 ifdef building_out_of_srctree 621 # Before starting out-of-tree build, make sure 568 # Before starting out-of-tree build, make sure the source tree is clean. 622 # outputmakefile generates a Makefile in the o 569 # outputmakefile generates a Makefile in the output directory, if using a 623 # separate output directory. This allows conve 570 # separate output directory. This allows convenient use of make in the 624 # output directory. 571 # output directory. 625 # At the same time when output Makefile genera 572 # At the same time when output Makefile generated, generate .gitignore to 626 # ignore whole output directory 573 # ignore whole output directory 627 574 628 quiet_cmd_makefile = GEN Makefile 575 quiet_cmd_makefile = GEN Makefile 629 cmd_makefile = { \ 576 cmd_makefile = { \ 630 echo "\# Automatically generated by $( 577 echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ 631 echo "include $(srctree)/Makefile"; \ 578 echo "include $(srctree)/Makefile"; \ 632 } > Makefile 579 } > Makefile 633 580 634 outputmakefile: 581 outputmakefile: 635 @if [ -f $(srctree)/.config -o \ !! 582 $(Q)if [ -f $(srctree)/.config -o \ 636 -d $(srctree)/include/config 583 -d $(srctree)/include/config -o \ 637 -d $(srctree)/arch/$(SRCARCH) 584 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 638 echo >&2 "***"; \ 585 echo >&2 "***"; \ 639 echo >&2 "*** The source tree 586 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 640 echo >&2 "*** in $(abs_srctree 587 echo >&2 "*** in $(abs_srctree)";\ 641 echo >&2 "***"; \ 588 echo >&2 "***"; \ 642 false; \ 589 false; \ 643 fi 590 fi 644 $(Q)ln -fsn $(srctree) source 591 $(Q)ln -fsn $(srctree) source 645 $(call cmd,makefile) 592 $(call cmd,makefile) 646 $(Q)test -e .gitignore || \ 593 $(Q)test -e .gitignore || \ 647 { echo "# this is build directory, ign 594 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 648 endif 595 endif 649 596 650 # The expansion should be delayed until arch/$ 597 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 651 # Some architectures define CROSS_COMPILE in a 598 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 652 # CC_VERSION_TEXT is referenced from Kconfig ( 599 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 653 # and from include/config/auto.conf.cmd to det 600 # and from include/config/auto.conf.cmd to detect the compiler upgrade. 654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC 601 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 655 602 656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), 603 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 657 include $(srctree)/scripts/Makefile.clang 604 include $(srctree)/scripts/Makefile.clang 658 endif 605 endif 659 606 660 # Include this also for config targets because 607 # Include this also for config targets because some architectures need 661 # cc-cross-prefix to determine CROSS_COMPILE. 608 # cc-cross-prefix to determine CROSS_COMPILE. 662 ifdef need-compiler 609 ifdef need-compiler 663 include $(srctree)/scripts/Makefile.compiler 610 include $(srctree)/scripts/Makefile.compiler 664 endif 611 endif 665 612 666 ifdef config-build 613 ifdef config-build 667 # ============================================ 614 # =========================================================================== 668 # *config targets only - make sure prerequisit 615 # *config targets only - make sure prerequisites are updated, and descend 669 # in scripts/kconfig to make the *config targe 616 # in scripts/kconfig to make the *config target 670 617 671 # Read arch-specific Makefile to set KBUILD_DE !! 618 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 672 # KBUILD_DEFCONFIG may point out an alternativ 619 # KBUILD_DEFCONFIG may point out an alternative default configuration 673 # used for 'make defconfig' 620 # used for 'make defconfig' 674 include $(srctree)/arch/$(SRCARCH)/Makefile 621 include $(srctree)/arch/$(SRCARCH)/Makefile 675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS 622 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 676 623 677 config: outputmakefile scripts_basic FORCE 624 config: outputmakefile scripts_basic FORCE 678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 625 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 679 626 680 %config: outputmakefile scripts_basic FORCE 627 %config: outputmakefile scripts_basic FORCE 681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 628 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 682 629 683 else #!config-build 630 else #!config-build 684 # ============================================ 631 # =========================================================================== 685 # Build targets only - this includes vmlinux, !! 632 # Build targets only - this includes vmlinux, arch specific targets, clean 686 # targets and others. In general all targets e 633 # targets and others. In general all targets except *config targets. 687 634 688 # If building an external module we do not car 635 # If building an external module we do not care about the all: rule 689 # but instead __all depend on modules 636 # but instead __all depend on modules 690 PHONY += all 637 PHONY += all 691 ifeq ($(KBUILD_EXTMOD),) 638 ifeq ($(KBUILD_EXTMOD),) 692 __all: all 639 __all: all 693 else 640 else 694 __all: modules 641 __all: modules 695 endif 642 endif 696 643 697 targets := << 698 << 699 # Decide whether to build built-in, modular, o 644 # Decide whether to build built-in, modular, or both. 700 # Normally, just do built-in. 645 # Normally, just do built-in. 701 646 702 KBUILD_MODULES := 647 KBUILD_MODULES := 703 KBUILD_BUILTIN := 1 648 KBUILD_BUILTIN := 1 704 649 705 # If we have only "make modules", don't compil 650 # If we have only "make modules", don't compile built-in objects. 706 ifeq ($(MAKECMDGOALS),modules) 651 ifeq ($(MAKECMDGOALS),modules) 707 KBUILD_BUILTIN := 652 KBUILD_BUILTIN := 708 endif 653 endif 709 654 710 # If we have "make <whatever> modules", compil 655 # If we have "make <whatever> modules", compile modules 711 # in addition to whatever we do anyway. 656 # in addition to whatever we do anyway. 712 # Just "make" or "make all" shall build module 657 # Just "make" or "make all" shall build modules as well 713 658 714 ifneq ($(filter all modules nsdeps %compile_co 659 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) 715 KBUILD_MODULES := 1 660 KBUILD_MODULES := 1 716 endif 661 endif 717 662 718 ifeq ($(MAKECMDGOALS),) 663 ifeq ($(MAKECMDGOALS),) 719 KBUILD_MODULES := 1 664 KBUILD_MODULES := 1 720 endif 665 endif 721 666 722 export KBUILD_MODULES KBUILD_BUILTIN 667 export KBUILD_MODULES KBUILD_BUILTIN 723 668 724 ifdef need-config 669 ifdef need-config 725 include include/config/auto.conf 670 include include/config/auto.conf 726 endif 671 endif 727 672 728 ifeq ($(KBUILD_EXTMOD),) 673 ifeq ($(KBUILD_EXTMOD),) 729 # Objects we will link into vmlinux / subdirs 674 # Objects we will link into vmlinux / subdirs we need to visit 730 core-y := !! 675 core-y := init/ usr/ arch/$(SRCARCH)/ 731 drivers-y := !! 676 drivers-y := drivers/ sound/ >> 677 drivers-$(CONFIG_SAMPLES) += samples/ >> 678 drivers-$(CONFIG_NET) += net/ >> 679 drivers-y += virt/ 732 libs-y := lib/ 680 libs-y := lib/ 733 endif # KBUILD_EXTMOD 681 endif # KBUILD_EXTMOD 734 682 735 # The all: target is the default when no targe 683 # The all: target is the default when no target is given on the 736 # command line. 684 # command line. 737 # This allow a user to issue only 'make' to bu 685 # This allow a user to issue only 'make' to build a kernel including modules 738 # Defaults to vmlinux, but the arch makefile u 686 # Defaults to vmlinux, but the arch makefile usually adds further targets 739 all: vmlinux 687 all: vmlinux 740 688 741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover 689 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage 742 ifdef CONFIG_CC_IS_GCC 690 ifdef CONFIG_CC_IS_GCC 743 CFLAGS_GCOV += -fno-tree-loop-im 691 CFLAGS_GCOV += -fno-tree-loop-im 744 endif 692 endif 745 export CFLAGS_GCOV 693 export CFLAGS_GCOV 746 694 747 # The arch Makefiles can override CC_FLAGS_FTR 695 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 748 ifdef CONFIG_FUNCTION_TRACER 696 ifdef CONFIG_FUNCTION_TRACER 749 CC_FLAGS_FTRACE := -pg 697 CC_FLAGS_FTRACE := -pg 750 endif 698 endif 751 699 752 include $(srctree)/arch/$(SRCARCH)/Makefile 700 include $(srctree)/arch/$(SRCARCH)/Makefile 753 701 754 ifdef need-config 702 ifdef need-config 755 ifdef may-sync-config 703 ifdef may-sync-config 756 # Read in dependencies to all Kconfig* files, 704 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if 757 # changes are detected. This should be include 705 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile 758 # because some architectures define CROSS_COMP 706 # because some architectures define CROSS_COMPILE there. 759 include include/config/auto.conf.cmd 707 include include/config/auto.conf.cmd 760 708 761 $(KCONFIG_CONFIG): 709 $(KCONFIG_CONFIG): 762 @echo >&2 '***' 710 @echo >&2 '***' 763 @echo >&2 '*** Configuration file "$@" 711 @echo >&2 '*** Configuration file "$@" not found!' 764 @echo >&2 '***' 712 @echo >&2 '***' 765 @echo >&2 '*** Please run some configu 713 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 766 @echo >&2 '*** "make menuconfig" or "m 714 @echo >&2 '*** "make menuconfig" or "make xconfig").' 767 @echo >&2 '***' 715 @echo >&2 '***' 768 @/bin/false 716 @/bin/false 769 717 770 # The actual configuration files used during t 718 # The actual configuration files used during the build are stored in 771 # include/generated/ and include/config/. Upda 719 # include/generated/ and include/config/. Update them if .config is newer than 772 # include/config/auto.conf (which mirrors .con 720 # include/config/auto.conf (which mirrors .config). 773 # 721 # 774 # This exploits the 'multi-target pattern rule 722 # This exploits the 'multi-target pattern rule' trick. 775 # The syncconfig should be executed only once 723 # The syncconfig should be executed only once to make all the targets. 776 # (Note: use the grouped target '&:' when we b 724 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 777 # 725 # 778 # Do not use $(call cmd,...) here. That would 726 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 779 # so you cannot notice that Kconfig is waiting 727 # so you cannot notice that Kconfig is waiting for the user input. 780 %/config/auto.conf %/config/auto.conf.cmd %/ge !! 728 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) 781 $(Q)$(kecho) " SYNC $@" 729 $(Q)$(kecho) " SYNC $@" 782 $(Q)$(MAKE) -f $(srctree)/Makefile syn 730 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 783 else # !may-sync-config 731 else # !may-sync-config 784 # External modules and some install targets ne 732 # External modules and some install targets need include/generated/autoconf.h 785 # and include/config/auto.conf but do not care 733 # and include/config/auto.conf but do not care if they are up-to-date. 786 # Use auto.conf to trigger the test 734 # Use auto.conf to trigger the test 787 PHONY += include/config/auto.conf 735 PHONY += include/config/auto.conf 788 736 789 include/config/auto.conf: 737 include/config/auto.conf: 790 @test -e include/generated/autoconf.h !! 738 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 791 echo >&2; 739 echo >&2; \ 792 echo >&2 " ERROR: Kernel configuratio 740 echo >&2 " ERROR: Kernel configuration is invalid."; \ 793 echo >&2 " include/generated/a 741 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 794 echo >&2 " Run 'make oldconfig 742 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 795 echo >&2 ; 743 echo >&2 ; \ 796 /bin/false) 744 /bin/false) 797 745 798 endif # may-sync-config 746 endif # may-sync-config 799 endif # need-config 747 endif # need-config 800 748 801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch 749 KBUILD_CFLAGS += -fno-delete-null-pointer-checks >> 750 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) >> 751 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) >> 752 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) >> 753 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 802 754 803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 755 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 804 KBUILD_CFLAGS += -O2 756 KBUILD_CFLAGS += -O2 805 KBUILD_RUSTFLAGS += -Copt-level=2 !! 757 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 >> 758 KBUILD_CFLAGS += -O3 806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 759 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 807 KBUILD_CFLAGS += -Os 760 KBUILD_CFLAGS += -Os 808 KBUILD_RUSTFLAGS += -Copt-level=s << 809 endif 761 endif 810 762 811 # Always set `debug-assertions` and `overflow- << 812 # depends on `opt-level` and `debug-assertions << 813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( << 814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C << 815 << 816 # Tell gcc to never replace conditional load w 763 # Tell gcc to never replace conditional load with a non-conditional one 817 ifdef CONFIG_CC_IS_GCC 764 ifdef CONFIG_CC_IS_GCC 818 # gcc-10 renamed --param=allow-store-data-race 765 # gcc-10 renamed --param=allow-store-data-races=0 to 819 # -fno-allow-store-data-races. 766 # -fno-allow-store-data-races. 820 KBUILD_CFLAGS += $(call cc-option,--param=al 767 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 821 KBUILD_CFLAGS += $(call cc-option,-fno-allow 768 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 822 endif 769 endif 823 770 824 ifdef CONFIG_READABLE_ASM 771 ifdef CONFIG_READABLE_ASM 825 # Disable optimizations that make assembler li 772 # Disable optimizations that make assembler listings hard to read. 826 # reorder blocks reorders the control in the f 773 # reorder blocks reorders the control in the function 827 # ipa clone creates specialized cloned functio 774 # ipa clone creates specialized cloned functions 828 # partial inlining inlines only parts of funct 775 # partial inlining inlines only parts of functions 829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- 776 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 830 endif 777 endif 831 778 >> 779 ifneq ($(CONFIG_FRAME_WARN),0) >> 780 KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) >> 781 endif >> 782 832 stackp-flags-y 783 stackp-flags-y := -fno-stack-protector 833 stackp-flags-$(CONFIG_STACKPROTECTOR) 784 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 785 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 835 786 836 KBUILD_CFLAGS += $(stackp-flags-y) 787 KBUILD_CFLAGS += $(stackp-flags-y) 837 788 838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 789 KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror 839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 790 KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds >> 791 KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) >> 792 >> 793 ifdef CONFIG_CC_IS_CLANG >> 794 KBUILD_CPPFLAGS += -Qunused-arguments >> 795 # The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. >> 796 KBUILD_CFLAGS += -Wno-gnu >> 797 else >> 798 >> 799 # gcc inanely warns about local variables called 'main' >> 800 KBUILD_CFLAGS += -Wno-main >> 801 endif >> 802 >> 803 # These warnings generated too much noise in a regular build. >> 804 # Use make W=1 to enable them (see scripts/Makefile.extrawarn) >> 805 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) >> 806 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) >> 807 >> 808 # These result in bogus false positives >> 809 KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) 840 810 841 ifdef CONFIG_FRAME_POINTER 811 ifdef CONFIG_FRAME_POINTER 842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 812 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y << 844 else 813 else 845 # Some targets (ARM with Thumb2, for example), 814 # Some targets (ARM with Thumb2, for example), can't be built with frame 846 # pointers. For those, we don't have FUNCTION 815 # pointers. For those, we don't have FUNCTION_TRACER automatically 847 # select FRAME_POINTER. However, FUNCTION_TRA 816 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 848 # incompatible with -fomit-frame-pointer with 817 # incompatible with -fomit-frame-pointer with current GCC, so we don't use 849 # -fomit-frame-pointer with FUNCTION_TRACER. 818 # -fomit-frame-pointer with FUNCTION_TRACER. 850 # In the Rust target specification, "frame-poi << 851 # to "may-omit". << 852 ifndef CONFIG_FUNCTION_TRACER 819 ifndef CONFIG_FUNCTION_TRACER 853 KBUILD_CFLAGS += -fomit-frame-pointer 820 KBUILD_CFLAGS += -fomit-frame-pointer 854 endif 821 endif 855 endif 822 endif 856 823 857 # Initialize all stack variables with a 0xAA p 824 # Initialize all stack variables with a 0xAA pattern. 858 ifdef CONFIG_INIT_STACK_ALL_PATTERN 825 ifdef CONFIG_INIT_STACK_ALL_PATTERN 859 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat 826 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 860 endif 827 endif 861 828 862 # Initialize all stack variables with a zero v 829 # Initialize all stack variables with a zero value. 863 ifdef CONFIG_INIT_STACK_ALL_ZERO 830 ifdef CONFIG_INIT_STACK_ALL_ZERO 864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer 831 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero 865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 832 ifdef CONFIG_CC_IS_CLANG 866 # https://github.com/llvm/llvm-project/issues/ !! 833 # https://bugs.llvm.org/show_bug.cgi?id=45497 867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi !! 834 KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 868 export CC_AUTO_VAR_INIT_ZERO_ENABLER << 869 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA << 870 endif 835 endif 871 endif 836 endif 872 837 873 # While VLAs have been removed, GCC produces u 838 # While VLAs have been removed, GCC produces unreachable stack probes 874 # for the randomize_kstack_offset feature. Dis 839 # for the randomize_kstack_offset feature. Disable it for all compilers. 875 KBUILD_CFLAGS += $(call cc-option, -fno-stac 840 KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 876 841 877 # Clear used registers at func exit (to reduce 842 # Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 878 ifdef CONFIG_ZERO_CALL_USED_REGS 843 ifdef CONFIG_ZERO_CALL_USED_REGS 879 KBUILD_CFLAGS += -fzero-call-used-regs=used- 844 KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 880 endif 845 endif 881 846 882 ifdef CONFIG_FUNCTION_TRACER 847 ifdef CONFIG_FUNCTION_TRACER 883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC 848 ifdef CONFIG_FTRACE_MCOUNT_USE_CC 884 CC_FLAGS_FTRACE += -mrecord-mcount 849 CC_FLAGS_FTRACE += -mrecord-mcount 885 ifdef CONFIG_HAVE_NOP_MCOUNT 850 ifdef CONFIG_HAVE_NOP_MCOUNT 886 ifeq ($(call cc-option-yn, -mnop-mcount),y 851 ifeq ($(call cc-option-yn, -mnop-mcount),y) 887 CC_FLAGS_FTRACE += -mnop-mcount 852 CC_FLAGS_FTRACE += -mnop-mcount 888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 853 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 889 endif 854 endif 890 endif 855 endif 891 endif 856 endif 892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 857 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 893 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT !! 858 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 894 CC_FLAGS_USING += -DCC_USING_NOP_MCOU << 895 endif << 896 endif 859 endif 897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 860 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 898 ifdef CONFIG_HAVE_C_RECORDMCOUNT 861 ifdef CONFIG_HAVE_C_RECORDMCOUNT 899 BUILD_C_RECORDMCOUNT := y 862 BUILD_C_RECORDMCOUNT := y 900 export BUILD_C_RECORDMCOUNT 863 export BUILD_C_RECORDMCOUNT 901 endif 864 endif 902 endif 865 endif 903 ifdef CONFIG_HAVE_FENTRY 866 ifdef CONFIG_HAVE_FENTRY 904 # s390-linux-gnu-gcc did not support -mfentr 867 # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 905 ifeq ($(call cc-option-yn, -mfentry),y) 868 ifeq ($(call cc-option-yn, -mfentry),y) 906 CC_FLAGS_FTRACE += -mfentry 869 CC_FLAGS_FTRACE += -mfentry 907 CC_FLAGS_USING += -DCC_USING_FENTRY 870 CC_FLAGS_USING += -DCC_USING_FENTRY 908 endif 871 endif 909 endif 872 endif 910 export CC_FLAGS_FTRACE 873 export CC_FLAGS_FTRACE 911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 874 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 912 KBUILD_AFLAGS += $(CC_FLAGS_USING) 875 KBUILD_AFLAGS += $(CC_FLAGS_USING) 913 endif 876 endif 914 877 915 # We trigger additional mismatches with less i 878 # We trigger additional mismatches with less inlining 916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 879 ifdef CONFIG_DEBUG_SECTION_MISMATCH 917 KBUILD_CFLAGS += -fno-inline-functions-called- 880 KBUILD_CFLAGS += -fno-inline-functions-called-once 918 endif 881 endif 919 882 920 # `rustc`'s `-Zfunction-sections` applies to d << 921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 883 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 884 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections << 924 LDFLAGS_vmlinux += --gc-sections 885 LDFLAGS_vmlinux += --gc-sections 925 endif 886 endif 926 887 927 ifdef CONFIG_SHADOW_CALL_STACK 888 ifdef CONFIG_SHADOW_CALL_STACK 928 ifndef CONFIG_DYNAMIC_SCS << 929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac 889 CC_FLAGS_SCS := -fsanitize=shadow-call-stack 930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) 890 KBUILD_CFLAGS += $(CC_FLAGS_SCS) 931 endif << 932 export CC_FLAGS_SCS 891 export CC_FLAGS_SCS 933 endif 892 endif 934 893 935 ifdef CONFIG_LTO_CLANG 894 ifdef CONFIG_LTO_CLANG 936 ifdef CONFIG_LTO_CLANG_THIN 895 ifdef CONFIG_LTO_CLANG_THIN 937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 896 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit >> 897 KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache 938 else 898 else 939 CC_FLAGS_LTO := -flto 899 CC_FLAGS_LTO := -flto 940 endif 900 endif 941 CC_FLAGS_LTO += -fvisibility=hidden 901 CC_FLAGS_LTO += -fvisibility=hidden 942 902 943 # Limit inlining across translation units to r 903 # Limit inlining across translation units to reduce binary size 944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 904 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 >> 905 >> 906 # Check for frame size exceeding threshold during prolog/epilog insertion >> 907 # when using lld < 13.0.0. >> 908 ifneq ($(CONFIG_FRAME_WARN),0) >> 909 ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0) >> 910 KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) >> 911 endif >> 912 endif 945 endif 913 endif 946 914 947 ifdef CONFIG_LTO 915 ifdef CONFIG_LTO 948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 916 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 949 KBUILD_AFLAGS += -fno-lto 917 KBUILD_AFLAGS += -fno-lto 950 export CC_FLAGS_LTO 918 export CC_FLAGS_LTO 951 endif 919 endif 952 920 953 ifdef CONFIG_CFI_CLANG 921 ifdef CONFIG_CFI_CLANG 954 CC_FLAGS_CFI := -fsanitize=kcfi !! 922 CC_FLAGS_CFI := -fsanitize=cfi \ >> 923 -fsanitize-cfi-cross-dso \ >> 924 -fno-sanitize-cfi-canonical-jump-tables \ >> 925 -fno-sanitize-trap=cfi \ >> 926 -fno-sanitize-blacklist >> 927 >> 928 ifdef CONFIG_CFI_PERMISSIVE >> 929 CC_FLAGS_CFI += -fsanitize-recover=cfi >> 930 endif >> 931 >> 932 # If LTO flags are filtered out, we must also filter out CFI. >> 933 CC_FLAGS_LTO += $(CC_FLAGS_CFI) 955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) 934 KBUILD_CFLAGS += $(CC_FLAGS_CFI) 956 export CC_FLAGS_CFI 935 export CC_FLAGS_CFI 957 endif 936 endif 958 937 959 # Architectures can define flags to add/remove !! 938 ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B 960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN !! 939 KBUILD_CFLAGS += -falign-functions=64 961 export CC_FLAGS_FPU << 962 export CC_FLAGS_NO_FPU << 963 << 964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) << 965 # Set the minimal function alignment. Use the << 966 # -fmin-function-alignment if it is available, << 967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME << 968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT << 969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO << 970 else << 971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU << 972 endif << 973 endif 940 endif 974 941 975 # arch Makefile may override CC so keep this a 942 # arch Makefile may override CC so keep this after arch Makefile is included 976 NOSTDINC_FLAGS += -nostdinc 943 NOSTDINC_FLAGS += -nostdinc 977 944 978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 945 # warn about C99 declaration after statement 979 # the kernel uses only C99 flexible arrays for !! 946 KBUILD_CFLAGS += -Wdeclaration-after-statement 980 # arrays. Enforce this for everything that may !! 947 981 # perform bounds checking. !! 948 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel 982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl !! 949 KBUILD_CFLAGS += -Wvla 983 !! 950 984 #Currently, disable -Wstringop-overflow for GC !! 951 # disable pointer signed / unsigned warnings in gcc 4.0 985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW !! 952 KBUILD_CFLAGS += -Wno-pointer-sign 986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + !! 953 >> 954 # In order to make sure new function cast mismatches are not introduced >> 955 # in the kernel (to avoid tripping CFI checking), the kernel should be >> 956 # globally built with -Wcast-function-type. >> 957 KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) >> 958 >> 959 # disable stringop warnings in gcc 8+ >> 960 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) >> 961 >> 962 # We'll want to enable this eventually, but it's not going away for 5.7 at least >> 963 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) >> 964 >> 965 # Another good warning that we'll want to enable eventually >> 966 KBUILD_CFLAGS += $(call cc-disable-warning, restrict) >> 967 >> 968 # Enabled with W=2, disabled by default as noisy >> 969 ifdef CONFIG_CC_IS_GCC >> 970 KBUILD_CFLAGS += -Wno-maybe-uninitialized >> 971 endif >> 972 >> 973 ifdef CONFIG_CC_IS_GCC >> 974 # The allocators already balk at large sizes, so silence the compiler >> 975 # warnings for bounds checks involving those possible values. While >> 976 # -Wno-alloc-size-larger-than would normally be used here, earlier versions >> 977 # of gcc (<9.1) weirdly don't handle the option correctly when _other_ >> 978 # warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX >> 979 # doesn't work (as it is documented to), silently resolving to "0" prior to >> 980 # version 9.1 (and producing an error more recently). Numeric values larger >> 981 # than PTRDIFF_MAX also don't work prior to version 9.1, which are silently >> 982 # ignored, continuing to default to PTRDIFF_MAX. So, left with no other >> 983 # choice, we must perform a versioned check to disable this warning. >> 984 # https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au >> 985 KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than) >> 986 endif 987 987 988 # disable invalid "can't wrap" optimizations f 988 # disable invalid "can't wrap" optimizations for signed / pointers 989 KBUILD_CFLAGS += -fno-strict-overflow 989 KBUILD_CFLAGS += -fno-strict-overflow 990 990 991 # Make sure -fstack-check isn't enabled (like 991 # Make sure -fstack-check isn't enabled (like gentoo apparently did) 992 KBUILD_CFLAGS += -fno-stack-check 992 KBUILD_CFLAGS += -fno-stack-check 993 993 994 # conserve stack if available 994 # conserve stack if available 995 ifdef CONFIG_CC_IS_GCC 995 ifdef CONFIG_CC_IS_GCC 996 KBUILD_CFLAGS += -fconserve-stack 996 KBUILD_CFLAGS += -fconserve-stack 997 endif 997 endif 998 998 >> 999 # Prohibit date/time macros, which would make the build non-deterministic >> 1000 KBUILD_CFLAGS += -Werror=date-time >> 1001 >> 1002 # enforce correct pointer usage >> 1003 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) >> 1004 >> 1005 # Require designated initializers for all marked structures >> 1006 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) >> 1007 999 # change __FILE__ to the relative path from th 1008 # change __FILE__ to the relative path from the srctree 1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p 1009 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 1001 1010 1002 # include additional Makefiles when needed 1011 # include additional Makefiles when needed 1003 include-y := scripts/Ma 1012 include-y := scripts/Makefile.extrawarn 1004 include-$(CONFIG_DEBUG_INFO) += scripts/Ma 1013 include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma << 1006 include-$(CONFIG_KASAN) += scripts/Ma 1014 include-$(CONFIG_KASAN) += scripts/Makefile.kasan 1007 include-$(CONFIG_KCSAN) += scripts/Ma 1015 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1008 include-$(CONFIG_KMSAN) += scripts/Ma << 1009 include-$(CONFIG_UBSAN) += scripts/Ma 1016 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1010 include-$(CONFIG_KCOV) += scripts/Ma 1017 include-$(CONFIG_KCOV) += scripts/Makefile.kcov 1011 include-$(CONFIG_RANDSTRUCT) += scripts/Ma << 1012 include-$(CONFIG_GCC_PLUGINS) += scripts/Ma 1018 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1013 1019 1014 include $(addprefix $(srctree)/, $(include-y) 1020 include $(addprefix $(srctree)/, $(include-y)) 1015 1021 1016 # scripts/Makefile.gcc-plugins is intentional 1022 # scripts/Makefile.gcc-plugins is intentionally included last. 1017 # Do not add $(call cc-option,...) below this 1023 # Do not add $(call cc-option,...) below this line. When you build the kernel 1018 # from the clean source tree, the GCC plugins 1024 # from the clean source tree, the GCC plugins do not exist at this point. 1019 1025 1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS !! 1026 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 1021 KBUILD_CPPFLAGS += $(KCPPFLAGS) 1027 KBUILD_CPPFLAGS += $(KCPPFLAGS) 1022 KBUILD_AFLAGS += $(KAFLAGS) 1028 KBUILD_AFLAGS += $(KAFLAGS) 1023 KBUILD_CFLAGS += $(KCFLAGS) 1029 KBUILD_CFLAGS += $(KCFLAGS) 1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) << 1025 1030 1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 1031 KBUILD_LDFLAGS_MODULE += --build-id=sha1 1027 LDFLAGS_vmlinux += --build-id=sha1 1032 LDFLAGS_vmlinux += --build-id=sha1 1028 1033 1029 KBUILD_LDFLAGS += -z noexecstack 1034 KBUILD_LDFLAGS += -z noexecstack 1030 ifeq ($(CONFIG_LD_IS_BFD),y) 1035 ifeq ($(CONFIG_LD_IS_BFD),y) 1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn 1036 KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 1032 endif 1037 endif 1033 1038 1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1039 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1035 LDFLAGS_vmlinux += -X !! 1040 LDFLAGS_vmlinux += $(call ld-option, -X,) 1036 endif 1041 endif 1037 1042 1038 ifeq ($(CONFIG_RELR),y) 1043 ifeq ($(CONFIG_RELR),y) 1039 # ld.lld before 15 did not support -z pack-re !! 1044 LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags 1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy << 1041 endif 1045 endif 1042 1046 1043 # We never want expected sections to be place 1047 # We never want expected sections to be placed heuristically by the 1044 # linker. All sections should be explicitly n 1048 # linker. All sections should be explicitly named in the linker script. 1045 ifdef CONFIG_LD_ORPHAN_WARN 1049 ifdef CONFIG_LD_ORPHAN_WARN 1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG !! 1050 LDFLAGS_vmlinux += --orphan-handling=warn 1047 endif 1051 endif 1048 1052 1049 # Align the bit size of userspace programs wi 1053 # Align the bit size of userspace programs with the kernel 1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta 1054 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta 1055 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 1052 1056 1053 # make the checker run with the right archite 1057 # make the checker run with the right architecture 1054 CHECKFLAGS += --arch=$(ARCH) 1058 CHECKFLAGS += --arch=$(ARCH) 1055 1059 1056 # insure the checker run with the right endia 1060 # insure the checker run with the right endianness 1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 1061 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 1058 1062 1059 # the checker needs the correct machine size 1063 # the checker needs the correct machine size 1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1064 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1061 1065 1062 # Default kernel image to build when no speci 1066 # Default kernel image to build when no specific target is given. 1063 # KBUILD_IMAGE may be overruled on the comman 1067 # KBUILD_IMAGE may be overruled on the command line or 1064 # set in the environment 1068 # set in the environment 1065 # Also any assignments in arch/$(ARCH)/Makefi 1069 # Also any assignments in arch/$(ARCH)/Makefile take precedence over 1066 # this default value 1070 # this default value 1067 export KBUILD_IMAGE ?= vmlinux 1071 export KBUILD_IMAGE ?= vmlinux 1068 1072 1069 # 1073 # 1070 # INSTALL_PATH specifies where to place the u 1074 # INSTALL_PATH specifies where to place the updated kernel and system map 1071 # images. Default is /boot, but you can set i 1075 # images. Default is /boot, but you can set it to other values 1072 export INSTALL_PATH ?= /boot 1076 export INSTALL_PATH ?= /boot 1073 1077 1074 # 1078 # 1075 # INSTALL_DTBS_PATH specifies a prefix for re 1079 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1076 # Like INSTALL_MOD_PATH, it isn't defined in 1080 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1077 # an argument if needed. Otherwise it default 1081 # an argument if needed. Otherwise it defaults to the kernel install path 1078 # 1082 # 1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 1083 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1080 1084 1081 # 1085 # 1082 # INSTALL_MOD_PATH specifies a prefix to MODL 1086 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 1083 # relocations required by build roots. This 1087 # relocations required by build roots. This is not defined in the 1084 # makefile but the argument can be passed to 1088 # makefile but the argument can be passed to make if needed. 1085 # 1089 # 1086 1090 1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 1091 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 1088 export MODLIB 1092 export MODLIB 1089 1093 1090 PHONY += prepare0 1094 PHONY += prepare0 1091 1095 1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), 1096 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 1093 export MODORDER := $(extmod_prefix)modules.or 1097 export MODORDER := $(extmod_prefix)modules.order 1094 export MODULES_NSDEPS := $(extmod_prefix)modu 1098 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps 1095 1099 1096 ifeq ($(KBUILD_EXTMOD),) 1100 ifeq ($(KBUILD_EXTMOD),) >> 1101 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ >> 1102 core-$(CONFIG_BLOCK) += block/ >> 1103 core-$(CONFIG_IO_URING) += io_uring/ >> 1104 >> 1105 vmlinux-dirs := $(patsubst %/,%,$(filter %/, \ >> 1106 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ >> 1107 $(libs-y) $(libs-m))) 1097 1108 1098 build-dir := . !! 1109 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 1099 clean-dirs := $(sort . Documentation \ << 1100 $(patsubst %/,%,$(filter 1110 $(patsubst %/,%,$(filter %/, $(core-) \ 1101 $(drivers-) $(libs-)) 1111 $(drivers-) $(libs-)))) 1102 1112 1103 export ARCH_CORE := $(core-y) !! 1113 subdir-modorder := $(addsuffix modules.order,$(filter %/, \ 1104 export ARCH_LIB := $(filter %/, $(lib !! 1114 $(core-y) $(core-m) $(libs-y) $(libs-m) \ 1105 export ARCH_DRIVERS := $(drivers-y) $(dri !! 1115 $(drivers-y) $(drivers-m))) 1106 # Externally visible symbols (used by link-vm !! 1116 >> 1117 build-dirs := $(vmlinux-dirs) >> 1118 clean-dirs := $(vmlinux-alldirs) 1107 1119 1108 KBUILD_VMLINUX_OBJS := ./built-in.a !! 1120 # Externally visible symbols (used by link-vmlinux.sh) >> 1121 KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) >> 1122 KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) 1109 ifdef CONFIG_MODULES 1123 ifdef CONFIG_MODULES 1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a 1124 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib 1125 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1112 else 1126 else 1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, 1127 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1114 endif 1128 endif >> 1129 KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) 1115 1130 1116 export KBUILD_VMLINUX_LIBS !! 1131 export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS 1117 export KBUILD_LDS := arch/$(SRCARCH) 1132 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds >> 1133 # used by scripts/Makefile.package >> 1134 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 1118 1135 >> 1136 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) >> 1137 >> 1138 # Recurse until adjust_autoksyms.sh is satisfied >> 1139 PHONY += autoksyms_recursive 1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1140 ifdef CONFIG_TRIM_UNUSED_KSYMS 1120 # For the kernel to actually contain only the 1141 # For the kernel to actually contain only the needed exported symbols, 1121 # we have to build modules as well to determi 1142 # we have to build modules as well to determine what those symbols are. >> 1143 # (this can be evaluated only once include/config/auto.conf has been included) 1122 KBUILD_MODULES := 1 1144 KBUILD_MODULES := 1 >> 1145 >> 1146 autoksyms_recursive: descend modules.order >> 1147 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ >> 1148 "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive" 1123 endif 1149 endif 1124 1150 1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1151 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1126 quiet_cmd_ar_vmlinux.a = AR $@ << 1127 cmd_ar_vmlinux.a = \ << 1128 rm -f $@; \ << 1129 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS << 1130 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) << 1131 << 1132 targets += vmlinux.a << 1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea << 1134 $(call if_changed,ar_vmlinux.a) << 1135 << 1136 PHONY += vmlinux_o << 1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) << 1138 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1139 1152 1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1153 quiet_cmd_autoksyms_h = GEN $@ 1141 @: !! 1154 cmd_autoksyms_h = mkdir -p $(dir $@); \ >> 1155 $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ >> 1156 >> 1157 $(autoksyms_h): >> 1158 $(call cmd,autoksyms_h) >> 1159 >> 1160 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) >> 1161 >> 1162 # Final link of vmlinux with optional arch pass after final link >> 1163 cmd_link-vmlinux = \ >> 1164 $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ >> 1165 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1142 1166 1143 PHONY += vmlinux !! 1167 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1144 # LDFLAGS_vmlinux in the top Makefile defines !! 1168 +$(call if_changed_dep,link-vmlinux) 1145 # not for decompressors. LDFLAGS_vmlinux in a !! 1169 1146 # unrelated; the decompressors just happen to !! 1170 targets := vmlinux 1147 # arch/*/boot/compressed/vmlinux. << 1148 # Export LDFLAGS_vmlinux only to scripts/Make << 1149 # << 1150 # _LDFLAGS_vmlinux is a workaround for the 'p << 1151 # https://savannah.gnu.org/bugs/?61463 << 1152 # For Make > 4.4, the following simple code w << 1153 # vmlinux: private export LDFLAGS_vmlinux := << 1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG << 1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ << 1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost << 1157 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1158 1171 1159 # The actual objects are generated when desce 1172 # The actual objects are generated when descending, 1160 # make sure no implicit rule kicks in 1173 # make sure no implicit rule kicks in 1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1174 $(sort $(vmlinux-deps) $(subdir-modorder)): descend ; 1162 1175 1163 ifeq ($(origin KERNELRELEASE),file) !! 1176 filechk_kernel.release = \ 1164 filechk_kernel.release = $(srctree)/scripts/s !! 1177 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1165 else << 1166 filechk_kernel.release = echo $(KERNELRELEASE << 1167 endif << 1168 1178 1169 # Store (new) KERNELRELEASE string in include 1179 # Store (new) KERNELRELEASE string in include/config/kernel.release 1170 include/config/kernel.release: FORCE 1180 include/config/kernel.release: FORCE 1171 $(call filechk,kernel.release) 1181 $(call filechk,kernel.release) 1172 1182 1173 # Additional helpers built in scripts/ 1183 # Additional helpers built in scripts/ 1174 # Carefully list dependencies so we do not tr 1184 # Carefully list dependencies so we do not try to build scripts twice 1175 # in parallel 1185 # in parallel 1176 PHONY += scripts 1186 PHONY += scripts 1177 scripts: scripts_basic scripts_dtc 1187 scripts: scripts_basic scripts_dtc 1178 $(Q)$(MAKE) $(build)=$(@) 1188 $(Q)$(MAKE) $(build)=$(@) 1179 1189 1180 # Things we need to do before we recursively 1190 # Things we need to do before we recursively start building the kernel 1181 # or the modules are listed in "prepare". 1191 # or the modules are listed in "prepare". 1182 # A multi level approach is used. prepareN is 1192 # A multi level approach is used. prepareN is processed before prepareN-1. 1183 # archprepare is used in arch Makefiles and w 1193 # archprepare is used in arch Makefiles and when processed asm symlink, 1184 # version.h and scripts_basic is processed / 1194 # version.h and scripts_basic is processed / created. 1185 1195 1186 PHONY += prepare archprepare 1196 PHONY += prepare archprepare 1187 1197 1188 archprepare: outputmakefile archheaders archs 1198 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 1189 asm-generic $(version_h) include/gene !! 1199 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ 1190 include/generated/compile.h include/g !! 1200 include/generated/autoconf.h remove-stale-files 1191 1201 1192 prepare0: archprepare 1202 prepare0: archprepare 1193 $(Q)$(MAKE) $(build)=scripts/mod 1203 $(Q)$(MAKE) $(build)=scripts/mod 1194 $(Q)$(MAKE) $(build)=. prepare !! 1204 $(Q)$(MAKE) $(build)=. 1195 1205 1196 # All the preparing.. 1206 # All the preparing.. 1197 prepare: prepare0 1207 prepare: prepare0 1198 ifdef CONFIG_RUST << 1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 1200 $(Q)$(MAKE) $(build)=rust << 1201 endif << 1202 1208 1203 PHONY += remove-stale-files 1209 PHONY += remove-stale-files 1204 remove-stale-files: 1210 remove-stale-files: 1205 $(Q)$(srctree)/scripts/remove-stale-f 1211 $(Q)$(srctree)/scripts/remove-stale-files 1206 1212 1207 # Support for using generic headers in asm-ge 1213 # Support for using generic headers in asm-generic 1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1214 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1209 1215 1210 PHONY += asm-generic uapi-asm-generic 1216 PHONY += asm-generic uapi-asm-generic 1211 asm-generic: uapi-asm-generic 1217 asm-generic: uapi-asm-generic 1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1218 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1213 generic=include/asm-generic 1219 generic=include/asm-generic 1214 uapi-asm-generic: 1220 uapi-asm-generic: 1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1221 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1216 generic=include/uapi/asm-generic 1222 generic=include/uapi/asm-generic 1217 1223 1218 # Generate some files 1224 # Generate some files 1219 # ------------------------------------------- 1225 # --------------------------------------------------------------------------- 1220 1226 1221 # KERNELRELEASE can change from a few differe 1227 # KERNELRELEASE can change from a few different places, meaning version.h 1222 # needs to be updated, so this check is force 1228 # needs to be updated, so this check is forced on all builds 1223 1229 1224 uts_len := 64 1230 uts_len := 64 1225 define filechk_utsrelease.h 1231 define filechk_utsrelease.h 1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1232 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1227 echo '"$(KERNELRELEASE)" exceeds $( 1233 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1228 exit 1; 1234 exit 1; \ 1229 fi; 1235 fi; \ 1230 echo \#define UTS_RELEASE \"$(KERNELR 1236 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1231 endef 1237 endef 1232 1238 1233 define filechk_version.h 1239 define filechk_version.h 1234 if [ $(SUBLEVEL) -gt 255 ]; then 1240 if [ $(SUBLEVEL) -gt 255 ]; then \ 1235 echo \#define LINUX_VERSION_C 1241 echo \#define LINUX_VERSION_CODE $(shell \ 1236 expr $(VERSION) \* 65536 + $( 1242 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 1237 else 1243 else \ 1238 echo \#define LINUX_VERSION_C 1244 echo \#define LINUX_VERSION_CODE $(shell \ 1239 expr $(VERSION) \* 65536 + $( 1245 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1240 fi; 1246 fi; \ 1241 echo '#define KERNEL_VERSION(a,b,c) ( 1247 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 1242 ((c) > 255 ? 255 : (c)))'; 1248 ((c) > 255 ? 255 : (c)))'; \ 1243 echo \#define LINUX_VERSION_MAJOR $(V 1249 echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 1244 echo \#define LINUX_VERSION_PATCHLEVE 1250 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 1245 echo \#define LINUX_VERSION_SUBLEVEL 1251 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 1246 endef 1252 endef 1247 1253 1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1254 $(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) 1249 $(version_h): private SUBLEVEL := $(or $(SUBL !! 1255 $(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) 1250 $(version_h): FORCE 1256 $(version_h): FORCE 1251 $(call filechk,version.h) 1257 $(call filechk,version.h) 1252 1258 1253 include/generated/utsrelease.h: include/confi 1259 include/generated/utsrelease.h: include/config/kernel.release FORCE 1254 $(call filechk,utsrelease.h) 1260 $(call filechk,utsrelease.h) 1255 1261 1256 filechk_compile.h = $(srctree)/scripts/mkcomp << 1257 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION << 1258 << 1259 include/generated/compile.h: FORCE << 1260 $(call filechk,compile.h) << 1261 << 1262 PHONY += headerdep 1262 PHONY += headerdep 1263 headerdep: 1263 headerdep: 1264 $(Q)find $(srctree)/include/ -name '* 1264 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1265 $(srctree)/scripts/headerdep.pl -I$(s 1265 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1266 1266 1267 # ------------------------------------------- 1267 # --------------------------------------------------------------------------- 1268 # Kernel headers 1268 # Kernel headers 1269 1269 1270 #Default location for installed headers 1270 #Default location for installed headers 1271 export INSTALL_HDR_PATH = $(objtree)/usr 1271 export INSTALL_HDR_PATH = $(objtree)/usr 1272 1272 1273 quiet_cmd_headers_install = INSTALL $(INSTALL 1273 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1274 cmd_headers_install = \ 1274 cmd_headers_install = \ 1275 mkdir -p $(INSTALL_HDR_PATH); \ 1275 mkdir -p $(INSTALL_HDR_PATH); \ 1276 rsync -mrl --include='*/' --include=' 1276 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1277 usr/include $(INSTALL_HDR_PATH) 1277 usr/include $(INSTALL_HDR_PATH) 1278 1278 1279 PHONY += headers_install 1279 PHONY += headers_install 1280 headers_install: headers 1280 headers_install: headers 1281 $(call cmd,headers_install) 1281 $(call cmd,headers_install) 1282 1282 1283 PHONY += archheaders archscripts 1283 PHONY += archheaders archscripts 1284 1284 1285 hdr-inst := -f $(srctree)/scripts/Makefile.he 1285 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1286 1286 1287 PHONY += headers 1287 PHONY += headers 1288 headers: $(version_h) scripts_unifdef uapi-as 1288 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 1289 $(if $(filter um, $(SRCARCH)), $(erro !! 1289 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ >> 1290 $(error Headers not exportable for the $(SRCARCH) architecture)) 1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1291 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC 1292 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1292 1293 1293 ifdef CONFIG_HEADERS_INSTALL 1294 ifdef CONFIG_HEADERS_INSTALL 1294 prepare: headers 1295 prepare: headers 1295 endif 1296 endif 1296 1297 1297 PHONY += scripts_unifdef 1298 PHONY += scripts_unifdef 1298 scripts_unifdef: scripts_basic 1299 scripts_unifdef: scripts_basic 1299 $(Q)$(MAKE) $(build)=scripts scripts/ 1300 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1300 1301 1301 # ------------------------------------------- 1302 # --------------------------------------------------------------------------- 1302 # Install 1303 # Install 1303 1304 1304 # Many distributions have the custom install 1305 # Many distributions have the custom install script, /sbin/installkernel. 1305 # If DKMS is installed, 'make install' will e !! 1306 # If DKMS is installed, 'make install' will eventually recuses back 1306 # to this Makefile to build and install exter !! 1307 # to the this Makefile to build and install external modules. 1307 # Cancel sub_make_done so that options such a 1308 # Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 1308 1309 1309 quiet_cmd_install = INSTALL $(INSTALL_PATH) !! 1310 install: sub_make_done := 1310 cmd_install = unset sub_make_done; $(sr << 1311 << 1312 # ------------------------------------------- << 1313 # vDSO install << 1314 << 1315 PHONY += vdso_install << 1316 vdso_install: export INSTALL_FILES = $(vdso-i << 1317 vdso_install: << 1318 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1319 1311 1320 # ------------------------------------------- 1312 # --------------------------------------------------------------------------- 1321 # Tools 1313 # Tools 1322 1314 1323 ifdef CONFIG_OBJTOOL !! 1315 ifdef CONFIG_STACK_VALIDATION 1324 prepare: tools/objtool 1316 prepare: tools/objtool 1325 endif 1317 endif 1326 1318 1327 ifdef CONFIG_BPF 1319 ifdef CONFIG_BPF 1328 ifdef CONFIG_DEBUG_INFO_BTF 1320 ifdef CONFIG_DEBUG_INFO_BTF 1329 prepare: tools/bpf/resolve_btfids 1321 prepare: tools/bpf/resolve_btfids 1330 endif 1322 endif 1331 endif 1323 endif 1332 1324 1333 # The tools build system is not a part of Kbu << 1334 # its own unique issues. If you need to integ << 1335 # please consider locating that tool outside << 1336 # standard Kbuild "hostprogs" syntax instead << 1337 # here. See Documentation/kbuild/makefiles.rs << 1338 << 1339 PHONY += resolve_btfids_clean 1325 PHONY += resolve_btfids_clean 1340 1326 1341 resolve_btfids_O = $(abspath $(objtree))/tool 1327 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 1342 1328 1343 # tools/bpf/resolve_btfids directory might no 1329 # tools/bpf/resolve_btfids directory might not exist 1344 # in output directory, skip its clean in that 1330 # in output directory, skip its clean in that case 1345 resolve_btfids_clean: 1331 resolve_btfids_clean: 1346 ifneq ($(wildcard $(resolve_btfids_O)),) 1332 ifneq ($(wildcard $(resolve_btfids_O)),) 1347 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ 1333 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 1348 endif 1334 endif 1349 1335 1350 # Clear a bunch of variables before executing 1336 # Clear a bunch of variables before executing the submake 1351 ifeq ($(quiet),silent_) 1337 ifeq ($(quiet),silent_) 1352 tools_silent=s 1338 tools_silent=s 1353 endif 1339 endif 1354 1340 1355 tools/: FORCE 1341 tools/: FORCE 1356 $(Q)mkdir -p $(objtree)/tools 1342 $(Q)mkdir -p $(objtree)/tools 1357 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1343 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1358 1344 1359 tools/%: FORCE 1345 tools/%: FORCE 1360 $(Q)mkdir -p $(objtree)/tools 1346 $(Q)mkdir -p $(objtree)/tools 1361 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1347 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1362 1348 1363 # ------------------------------------------- 1349 # --------------------------------------------------------------------------- 1364 # Kernel selftest 1350 # Kernel selftest 1365 1351 1366 PHONY += kselftest 1352 PHONY += kselftest 1367 kselftest: headers !! 1353 kselftest: 1368 $(Q)$(MAKE) -C $(srctree)/tools/testi 1354 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1369 1355 1370 kselftest-%: headers FORCE !! 1356 kselftest-%: FORCE 1371 $(Q)$(MAKE) -C $(srctree)/tools/testi 1357 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1372 1358 1373 PHONY += kselftest-merge 1359 PHONY += kselftest-merge 1374 kselftest-merge: 1360 kselftest-merge: 1375 $(if $(wildcard $(objtree)/.config),, 1361 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1376 $(Q)find $(srctree)/tools/testing/sel !! 1362 $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1377 xargs $(srctree)/scripts/kcon !! 1363 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol 1364 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1379 1365 1380 # ------------------------------------------- 1366 # --------------------------------------------------------------------------- 1381 # Devicetree files 1367 # Devicetree files 1382 1368 1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ 1369 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1384 dtstree := arch/$(SRCARCH)/boot/dts 1370 dtstree := arch/$(SRCARCH)/boot/dts 1385 endif 1371 endif 1386 1372 1387 ifneq ($(dtstree),) 1373 ifneq ($(dtstree),) 1388 1374 1389 %.dtb: dtbs_prepare !! 1375 %.dtb: include/config/kernel.release scripts_dtc 1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1376 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1391 1377 1392 %.dtbo: dtbs_prepare !! 1378 %.dtbo: include/config/kernel.release scripts_dtc 1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1379 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1394 1380 1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1381 PHONY += dtbs dtbs_install dtbs_check 1396 dtbs: dtbs_prepare !! 1382 dtbs: include/config/kernel.release scripts_dtc 1397 $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1383 $(Q)$(MAKE) $(build)=$(dtstree) 1398 << 1399 # include/config/kernel.release is actually n << 1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) << 1401 # dtbs_install depend on it as dtbs_install m << 1402 dtbs_prepare: include/config/kernel.release s << 1403 1384 1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), 1385 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1405 export CHECK_DTBS=y 1386 export CHECK_DTBS=y 1406 endif !! 1387 dtbs: dt_binding_check 1407 << 1408 ifneq ($(CHECK_DTBS),) << 1409 dtbs_prepare: dt_binding_schemas << 1410 endif 1388 endif 1411 1389 1412 dtbs_check: dtbs 1390 dtbs_check: dtbs 1413 1391 1414 dtbs_install: 1392 dtbs_install: 1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1393 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 1416 1394 1417 ifdef CONFIG_OF_EARLY_FLATTREE 1395 ifdef CONFIG_OF_EARLY_FLATTREE 1418 all: dtbs 1396 all: dtbs 1419 endif 1397 endif 1420 1398 1421 endif 1399 endif 1422 1400 1423 PHONY += scripts_dtc 1401 PHONY += scripts_dtc 1424 scripts_dtc: scripts_basic 1402 scripts_dtc: scripts_basic 1425 $(Q)$(MAKE) $(build)=scripts/dtc 1403 $(Q)$(MAKE) $(build)=scripts/dtc 1426 1404 1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO 1405 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1428 export CHECK_DTBS=y !! 1406 export CHECK_DT_BINDING=y 1429 endif 1407 endif 1430 1408 1431 PHONY += dt_binding_check dt_binding_schemas !! 1409 PHONY += dt_binding_check 1432 dt_binding_check: dt_binding_schemas scripts_ !! 1410 dt_binding_check: scripts_dtc 1433 $(Q)$(MAKE) $(build)=Documentation/de << 1434 << 1435 dt_binding_schemas: << 1436 $(Q)$(MAKE) $(build)=Documentation/de 1411 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1437 1412 1438 PHONY += dt_compatible_check << 1439 dt_compatible_check: dt_binding_schemas << 1440 $(Q)$(MAKE) $(build)=Documentation/de << 1441 << 1442 # ------------------------------------------- 1413 # --------------------------------------------------------------------------- 1443 # Modules 1414 # Modules 1444 1415 1445 ifdef CONFIG_MODULES 1416 ifdef CONFIG_MODULES 1446 1417 1447 # By default, build modules as well 1418 # By default, build modules as well 1448 1419 1449 all: modules 1420 all: modules 1450 1421 1451 # When we're building modules with modversion 1422 # When we're building modules with modversions, we need to consider 1452 # the built-in objects during the descend as 1423 # the built-in objects during the descend as well, in order to 1453 # make sure the checksums are up to date befo 1424 # make sure the checksums are up to date before we record them. 1454 ifdef CONFIG_MODVERSIONS 1425 ifdef CONFIG_MODVERSIONS 1455 KBUILD_BUILTIN := 1 1426 KBUILD_BUILTIN := 1 1456 endif 1427 endif 1457 1428 1458 # Build modules 1429 # Build modules 1459 # 1430 # >> 1431 # A module can be listed more than once in obj-m resulting in >> 1432 # duplicate lines in modules.order files. Those are removed >> 1433 # using awk while concatenating to the final file. 1460 1434 1461 # *.ko are usually independent of vmlinux, bu !! 1435 PHONY += modules 1462 # is an exception. !! 1436 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare 1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES << 1464 KBUILD_BUILTIN := 1 << 1465 modules: vmlinux << 1466 endif << 1467 1437 1468 modules: modules_prepare !! 1438 cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ >> 1439 >> 1440 modules.order: $(subdir-modorder) FORCE >> 1441 $(call if_changed,modules_order) >> 1442 >> 1443 targets += modules.order 1469 1444 1470 # Target to prepare building external modules 1445 # Target to prepare building external modules >> 1446 PHONY += modules_prepare 1471 modules_prepare: prepare 1447 modules_prepare: prepare 1472 $(Q)$(MAKE) $(build)=scripts scripts/ 1448 $(Q)$(MAKE) $(build)=scripts scripts/module.lds 1473 1449 >> 1450 export modules_sign_only := >> 1451 >> 1452 ifeq ($(CONFIG_MODULE_SIG),y) >> 1453 PHONY += modules_sign >> 1454 modules_sign: modules_install >> 1455 @: >> 1456 >> 1457 # modules_sign is a subset of modules_install. >> 1458 # 'make modules_install modules_sign' is equivalent to 'make modules_install'. >> 1459 ifeq ($(filter modules_install,$(MAKECMDGOALS)),) >> 1460 modules_sign_only := y >> 1461 endif >> 1462 endif >> 1463 >> 1464 modinst_pre := >> 1465 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) >> 1466 modinst_pre := __modinst_pre >> 1467 endif >> 1468 >> 1469 modules_install: $(modinst_pre) >> 1470 PHONY += __modinst_pre >> 1471 __modinst_pre: >> 1472 @rm -rf $(MODLIB)/kernel >> 1473 @rm -f $(MODLIB)/source >> 1474 @mkdir -p $(MODLIB)/kernel >> 1475 @ln -s $(abspath $(srctree)) $(MODLIB)/source >> 1476 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ >> 1477 rm -f $(MODLIB)/build ; \ >> 1478 ln -s $(CURDIR) $(MODLIB)/build ; \ >> 1479 fi >> 1480 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order >> 1481 @cp -f modules.builtin $(MODLIB)/ >> 1482 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ >> 1483 1474 endif # CONFIG_MODULES 1484 endif # CONFIG_MODULES 1475 1485 1476 ### 1486 ### 1477 # Cleaning is done on three levels. 1487 # Cleaning is done on three levels. 1478 # make clean Delete most generated files 1488 # make clean Delete most generated files 1479 # Leave enough to build extern 1489 # Leave enough to build external modules 1480 # make mrproper Delete the current configura 1490 # make mrproper Delete the current configuration, and all generated files 1481 # make distclean Remove editor backup files, 1491 # make distclean Remove editor backup files, patch leftover files and the like 1482 1492 1483 # Directories & files removed with 'make clea 1493 # Directories & files removed with 'make clean' 1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1494 CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ 1485 modules.builtin modules.builti 1495 modules.builtin modules.builtin.modinfo modules.nsdeps \ 1486 compile_commands.json rust/tes !! 1496 compile_commands.json .thinlto-cache 1487 rust-project.json .vmlinux.obj << 1488 1497 1489 # Directories & files removed with 'make mrpr 1498 # Directories & files removed with 'make mrproper' 1490 MRPROPER_FILES += include/config include/gene 1499 MRPROPER_FILES += include/config include/generated \ 1491 arch/$(SRCARCH)/include/gen !! 1500 arch/$(SRCARCH)/include/generated .tmp_objdiff \ 1492 debian snap tar-install PKG !! 1501 debian snap tar-install \ 1493 .config .config.old .versio 1502 .config .config.old .version \ 1494 Module.symvers \ 1503 Module.symvers \ 1495 certs/signing_key.pem \ 1504 certs/signing_key.pem \ 1496 certs/x509.genkey \ 1505 certs/x509.genkey \ 1497 vmlinux-gdb.py \ 1506 vmlinux-gdb.py \ 1498 rpmbuild \ !! 1507 *.spec 1499 rust/libmacros.so << 1500 1508 1501 # clean - Delete most, but leave enough to bu 1509 # clean - Delete most, but leave enough to build external modules 1502 # 1510 # 1503 clean: private rm-files := $(CLEAN_FILES) !! 1511 clean: rm-files := $(CLEAN_FILES) 1504 1512 1505 PHONY += archclean vmlinuxclean 1513 PHONY += archclean vmlinuxclean 1506 1514 1507 vmlinuxclean: 1515 vmlinuxclean: 1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1516 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1517 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1510 1518 1511 clean: archclean vmlinuxclean resolve_btfids_ 1519 clean: archclean vmlinuxclean resolve_btfids_clean 1512 1520 1513 # mrproper - Delete all generated files, incl 1521 # mrproper - Delete all generated files, including .config 1514 # 1522 # 1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1523 mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1516 mrproper-dirs := $(addprefix _mrproper_, 1524 mrproper-dirs := $(addprefix _mrproper_,scripts) 1517 1525 1518 PHONY += $(mrproper-dirs) mrproper 1526 PHONY += $(mrproper-dirs) mrproper 1519 $(mrproper-dirs): 1527 $(mrproper-dirs): 1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1528 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1521 1529 1522 mrproper: clean $(mrproper-dirs) 1530 mrproper: clean $(mrproper-dirs) 1523 $(call cmd,rmfiles) 1531 $(call cmd,rmfiles) 1524 @find . $(RCS_FIND_IGNORE) \ << 1525 \( -name '*.rmeta' \) \ << 1526 -type f -print | xargs rm -f << 1527 1532 1528 # distclean 1533 # distclean 1529 # 1534 # 1530 PHONY += distclean 1535 PHONY += distclean 1531 1536 1532 distclean: mrproper 1537 distclean: mrproper 1533 @find . $(RCS_FIND_IGNORE) \ 1538 @find . $(RCS_FIND_IGNORE) \ 1534 \( -name '*.orig' -o -name '* 1539 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1535 -o -name '*.bak' -o -name '#* 1540 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1536 -o -name 'core' -o -name tags 1541 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 1537 -o -name GPATH -o -name GRTAG 1542 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 1538 -type f -print | xargs rm -f 1543 -type f -print | xargs rm -f 1539 1544 1540 1545 1541 # Packaging of the kernel to various formats 1546 # Packaging of the kernel to various formats 1542 # ------------------------------------------- 1547 # --------------------------------------------------------------------------- 1543 1548 1544 %src-pkg: FORCE 1549 %src-pkg: FORCE 1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1550 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1546 %pkg: include/config/kernel.release FORCE 1551 %pkg: include/config/kernel.release FORCE 1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1552 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1548 1553 1549 # Brief documentation of the typical targets 1554 # Brief documentation of the typical targets used 1550 # ------------------------------------------- 1555 # --------------------------------------------------------------------------- 1551 1556 1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1557 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1553 boards := $(sort $(notdir $(boards))) 1558 boards := $(sort $(notdir $(boards))) 1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1559 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1560 board-dirs := $(sort $(notdir $(board-dirs:/=))) 1556 1561 1557 PHONY += help 1562 PHONY += help 1558 help: 1563 help: 1559 @echo 'Cleaning targets:' 1564 @echo 'Cleaning targets:' 1560 @echo ' clean - Remove mo 1565 @echo ' clean - Remove most generated files but keep the config and' 1561 @echo ' enough bu 1566 @echo ' enough build support to build external modules' 1562 @echo ' mrproper - Remove al 1567 @echo ' mrproper - Remove all generated files + config + various backup files' 1563 @echo ' distclean - mrproper 1568 @echo ' distclean - mrproper + remove editor backup and patch files' 1564 @echo '' 1569 @echo '' >> 1570 @echo 'Configuration targets:' 1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1571 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1566 @echo '' 1572 @echo '' 1567 @echo 'Other generic targets:' 1573 @echo 'Other generic targets:' 1568 @echo ' all - Build all 1574 @echo ' all - Build all targets marked with [*]' 1569 @echo '* vmlinux - Build the 1575 @echo '* vmlinux - Build the bare kernel' 1570 @echo '* modules - Build all 1576 @echo '* modules - Build all modules' 1571 @echo ' modules_install - Install a 1577 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1572 @echo ' vdso_install - Install u << 1573 @echo ' dir/ - Build all 1578 @echo ' dir/ - Build all files in dir and below' 1574 @echo ' dir/file.[ois] - Build spe 1579 @echo ' dir/file.[ois] - Build specified target only' 1575 @echo ' dir/file.ll - Build the 1580 @echo ' dir/file.ll - Build the LLVM assembly file' 1576 @echo ' (requires 1581 @echo ' (requires compiler support for LLVM assembly generation)' 1577 @echo ' dir/file.lst - Build spe 1582 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1578 @echo ' (requires 1583 @echo ' (requires a recent binutils and recent build (System.map))' 1579 @echo ' dir/file.ko - Build mod 1584 @echo ' dir/file.ko - Build module including final link' 1580 @echo ' modules_prepare - Set up fo 1585 @echo ' modules_prepare - Set up for building external modules' 1581 @echo ' tags/TAGS - Generate 1586 @echo ' tags/TAGS - Generate tags file for editors' 1582 @echo ' cscope - Generate 1587 @echo ' cscope - Generate cscope index' 1583 @echo ' gtags - Generate 1588 @echo ' gtags - Generate GNU GLOBAL index' 1584 @echo ' kernelrelease - Output th 1589 @echo ' kernelrelease - Output the release version string (use with make -s)' 1585 @echo ' kernelversion - Output th 1590 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1586 @echo ' image_name - Output th 1591 @echo ' image_name - Output the image name (use with make -s)' 1587 @echo ' headers_install - Install s 1592 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1588 echo ' (default: 1593 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1589 echo '' 1594 echo '' 1590 @echo 'Static analysers:' 1595 @echo 'Static analysers:' 1591 @echo ' checkstack - Generate !! 1596 @echo ' checkstack - Generate a list of stack hogs' 1592 @echo ' with a st << 1593 @echo ' versioncheck - Sanity ch 1597 @echo ' versioncheck - Sanity check on version.h usage' 1594 @echo ' includecheck - Check for 1598 @echo ' includecheck - Check for duplicate included header files' 1595 @echo ' export_report - List the 1599 @echo ' export_report - List the usages of all exported symbols' 1596 @echo ' headerdep - Detect in 1600 @echo ' headerdep - Detect inclusion cycles in headers' 1597 @echo ' coccicheck - Check wit 1601 @echo ' coccicheck - Check with Coccinelle' 1598 @echo ' clang-analyzer - Check wit 1602 @echo ' clang-analyzer - Check with clang static analyzer' 1599 @echo ' clang-tidy - Check wit 1603 @echo ' clang-tidy - Check with clang-tidy' 1600 @echo '' 1604 @echo '' 1601 @echo 'Tools:' 1605 @echo 'Tools:' 1602 @echo ' nsdeps - Generate 1606 @echo ' nsdeps - Generate missing symbol namespace dependencies' 1603 @echo '' 1607 @echo '' 1604 @echo 'Kernel selftest:' 1608 @echo 'Kernel selftest:' 1605 @echo ' kselftest - Build a 1609 @echo ' kselftest - Build and run kernel selftest' 1606 @echo ' Build, 1610 @echo ' Build, install, and boot kernel before' 1607 @echo ' running 1611 @echo ' running kselftest on it' 1608 @echo ' Run as 1612 @echo ' Run as root for full coverage' 1609 @echo ' kselftest-all - Build k 1613 @echo ' kselftest-all - Build kernel selftest' 1610 @echo ' kselftest-install - Build a 1614 @echo ' kselftest-install - Build and install kernel selftest' 1611 @echo ' kselftest-clean - Remove 1615 @echo ' kselftest-clean - Remove all generated kselftest files' 1612 @echo ' kselftest-merge - Merge a 1616 @echo ' kselftest-merge - Merge all the config dependencies of' 1613 @echo ' kselfte 1617 @echo ' kselftest to existing .config.' 1614 @echo '' 1618 @echo '' 1615 @echo 'Rust targets:' << 1616 @echo ' rustavailable - Checks wh << 1617 @echo ' available << 1618 @echo ' rustfmt - Reformat << 1619 @echo ' rustfmtcheck - Checks if << 1620 @echo ' is format << 1621 @echo ' rustdoc - Generate << 1622 @echo ' (requires << 1623 @echo ' rusttest - Runs the << 1624 @echo ' (requires << 1625 @echo ' rust-analyzer - Generate << 1626 @echo ' (requires << 1627 @echo ' dir/file.[os] - Build spe << 1628 @echo ' dir/file.rsi - Build mac << 1629 @echo ' Run with << 1630 @echo ' The outpu << 1631 @echo ' dir/file.ll - Build the << 1632 @echo '' << 1633 @$(if $(dtstree), \ 1619 @$(if $(dtstree), \ 1634 echo 'Devicetree:'; \ 1620 echo 'Devicetree:'; \ 1635 echo '* dtbs - !! 1621 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1636 echo ' dtbs_install - !! 1622 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1637 echo ' dt_binding_check - !! 1623 echo ' dt_binding_check - Validate device tree binding documents'; \ 1638 echo ' dt_binding_schema - !! 1624 echo ' dtbs_check - Validate device tree source files';\ 1639 echo ' dtbs_check - << 1640 echo '') 1625 echo '') 1641 1626 1642 @echo 'Userspace tools targets:' 1627 @echo 'Userspace tools targets:' 1643 @echo ' use "make tools/help"' 1628 @echo ' use "make tools/help"' 1644 @echo ' or "cd tools; make help"' 1629 @echo ' or "cd tools; make help"' 1645 @echo '' 1630 @echo '' 1646 @echo 'Kernel packaging:' 1631 @echo 'Kernel packaging:' 1647 @$(MAKE) -f $(srctree)/scripts/Makefi 1632 @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1648 @echo '' 1633 @echo '' 1649 @echo 'Documentation targets:' 1634 @echo 'Documentation targets:' 1650 @$(MAKE) -f $(srctree)/Documentation/ 1635 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1651 @echo '' 1636 @echo '' 1652 @echo 'Architecture-specific targets !! 1637 @echo 'Architecture specific targets ($(SRCARCH)):' 1653 @$(or $(archhelp),\ 1638 @$(or $(archhelp),\ 1654 echo ' No architecture-speci !! 1639 echo ' No architecture specific help defined for $(SRCARCH)') 1655 @echo '' 1640 @echo '' 1656 @$(if $(boards), \ 1641 @$(if $(boards), \ 1657 $(foreach b, $(boards), \ 1642 $(foreach b, $(boards), \ 1658 printf " %-27s - Build for % 1643 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1659 echo '') 1644 echo '') 1660 @$(if $(board-dirs), \ 1645 @$(if $(board-dirs), \ 1661 $(foreach b, $(board-dirs), \ 1646 $(foreach b, $(board-dirs), \ 1662 printf " %-16s - Show %s-spe 1647 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1663 printf " %-16s - Show all of 1648 printf " %-16s - Show all of the above\\n" help-boards; \ 1664 echo '') 1649 echo '') 1665 1650 1666 @echo ' make V=n [targets] 1: ver !! 1651 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1667 @echo ' 2: giv !! 1652 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1668 @echo ' V=1 an << 1669 @echo ' make O=dir [targets] Locate 1653 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1670 @echo ' make C=1 [targets] Check 1654 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1671 @echo ' (spars 1655 @echo ' (sparse by default)' 1672 @echo ' make C=2 [targets] Force 1656 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1657 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1674 @echo ' make W=n [targets] Enable !! 1658 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 1675 @echo ' 1: warnings w 1659 @echo ' 1: warnings which may be relevant and do not occur too often' 1676 @echo ' 2: warnings w 1660 @echo ' 2: warnings which occur quite often but may still be relevant' 1677 @echo ' 3: more obscu 1661 @echo ' 3: more obscure warnings, can most likely be ignored' 1678 @echo ' c: extra chec << 1679 @echo ' e: warnings a << 1680 @echo ' Multiple leve 1662 @echo ' Multiple levels can be combined with W=12 or W=123' 1681 @$(if $(dtstree), \ << 1682 echo ' make CHECK_DTBS=1 [ta << 1683 echo ' This can be ap << 1684 ) << 1685 @echo '' 1663 @echo '' 1686 @echo 'Execute "make" or "make all" 1664 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1687 @echo 'For further info see the ./RE 1665 @echo 'For further info see the ./README file' 1688 1666 1689 1667 1690 help-board-dirs := $(addprefix help-,$(board- 1668 help-board-dirs := $(addprefix help-,$(board-dirs)) 1691 1669 1692 help-boards: $(help-board-dirs) 1670 help-boards: $(help-board-dirs) 1693 1671 1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1672 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1695 1673 1696 $(help-board-dirs): help-%: 1674 $(help-board-dirs): help-%: 1697 @echo 'Architecture-specific targets !! 1675 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1698 @$(if $(boards-per-dir), \ 1676 @$(if $(boards-per-dir), \ 1699 $(foreach b, $(boards-per-dir 1677 $(foreach b, $(boards-per-dir), \ 1700 printf " %-24s - Build for % 1678 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1701 echo '') 1679 echo '') 1702 1680 1703 1681 1704 # Documentation targets 1682 # Documentation targets 1705 # ------------------------------------------- 1683 # --------------------------------------------------------------------------- 1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1684 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1707 linkcheckdocs dochelp refcheck !! 1685 linkcheckdocs dochelp refcheckdocs 1708 PHONY += $(DOC_TARGETS) 1686 PHONY += $(DOC_TARGETS) 1709 $(DOC_TARGETS): 1687 $(DOC_TARGETS): 1710 $(Q)$(MAKE) $(build)=Documentation $@ 1688 $(Q)$(MAKE) $(build)=Documentation $@ 1711 1689 1712 << 1713 # Rust targets << 1714 # ------------------------------------------- << 1715 << 1716 # "Is Rust available?" target << 1717 PHONY += rustavailable << 1718 rustavailable: << 1719 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 1720 << 1721 # Documentation target << 1722 # << 1723 # Using the singular to avoid running afoul o << 1724 PHONY += rustdoc << 1725 rustdoc: prepare << 1726 $(Q)$(MAKE) $(build)=rust $@ << 1727 << 1728 # Testing target << 1729 PHONY += rusttest << 1730 rusttest: prepare << 1731 $(Q)$(MAKE) $(build)=rust $@ << 1732 << 1733 # Formatting targets << 1734 PHONY += rustfmt rustfmtcheck << 1735 << 1736 # We skip `rust/alloc` since we want to minim << 1737 # << 1738 # We match using absolute paths since `find` << 1739 # when matching, which is a problem when e.g. << 1740 # We `grep` afterwards in order to remove the << 1741 rustfmt: << 1742 $(Q)find $(abs_srctree) -type f -name << 1743 -o -path $(abs_srctree)/rust/ << 1744 -o -path $(abs_objtree)/rust/ << 1745 | grep -Fv $(abs_srctree)/rus << 1746 | grep -Fv $(abs_objtree)/rus << 1747 | grep -Fv generated \ << 1748 | xargs $(RUSTFMT) $(rustfmt_ << 1749 << 1750 rustfmtcheck: rustfmt_flags = --check << 1751 rustfmtcheck: rustfmt << 1752 << 1753 # Misc 1690 # Misc 1754 # ------------------------------------------- 1691 # --------------------------------------------------------------------------- 1755 1692 1756 PHONY += misc-check << 1757 misc-check: << 1758 $(Q)$(srctree)/scripts/misc-check << 1759 << 1760 all: misc-check << 1761 << 1762 PHONY += scripts_gdb 1693 PHONY += scripts_gdb 1763 scripts_gdb: prepare0 1694 scripts_gdb: prepare0 1764 $(Q)$(MAKE) $(build)=scripts/gdb 1695 $(Q)$(MAKE) $(build)=scripts/gdb 1765 $(Q)ln -fsn $(abspath $(srctree)/scri 1696 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1766 1697 1767 ifdef CONFIG_GDB_SCRIPTS 1698 ifdef CONFIG_GDB_SCRIPTS 1768 all: scripts_gdb 1699 all: scripts_gdb 1769 endif 1700 endif 1770 1701 1771 else # KBUILD_EXTMOD 1702 else # KBUILD_EXTMOD 1772 1703 1773 filechk_kernel.release = echo $(KERNELRELEASE << 1774 << 1775 ### 1704 ### 1776 # External module support. 1705 # External module support. 1777 # When building external modules the kernel u 1706 # When building external modules the kernel used as basis is considered 1778 # read-only, and no consistency checks are ma 1707 # read-only, and no consistency checks are made and the make 1779 # system is not used on the basis kernel. If 1708 # system is not used on the basis kernel. If updates are required 1780 # in the basis kernel ordinary make commands 1709 # in the basis kernel ordinary make commands (without M=...) must be used. 1781 1710 1782 # We are always building only modules. 1711 # We are always building only modules. 1783 KBUILD_BUILTIN := 1712 KBUILD_BUILTIN := 1784 KBUILD_MODULES := 1 1713 KBUILD_MODULES := 1 1785 1714 1786 build-dir := $(KBUILD_EXTMOD) !! 1715 build-dirs := $(KBUILD_EXTMOD) >> 1716 $(MODORDER): descend >> 1717 @: 1787 1718 1788 compile_commands.json: $(extmod_prefix)compil 1719 compile_commands.json: $(extmod_prefix)compile_commands.json 1789 PHONY += compile_commands.json 1720 PHONY += compile_commands.json 1790 1721 1791 clean-dirs := $(KBUILD_EXTMOD) 1722 clean-dirs := $(KBUILD_EXTMOD) 1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1723 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ 1793 $(KBUILD_EXTMOD)/compile_commands.jso !! 1724 $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache 1794 1725 1795 PHONY += prepare 1726 PHONY += prepare 1796 # now expand this into a simple variable to r 1727 # now expand this into a simple variable to reduce the cost of shell evaluations 1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT 1728 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 1798 prepare: 1729 prepare: 1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF 1730 @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 1800 echo >&2 "warning: the compil 1731 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1801 echo >&2 " The kernel was bu 1732 echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 1802 echo >&2 " You are using: 1733 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 1803 fi 1734 fi 1804 1735 1805 PHONY += help 1736 PHONY += help 1806 help: 1737 help: 1807 @echo ' Building external modules.' 1738 @echo ' Building external modules.' 1808 @echo ' Syntax: make -C path/to/ker 1739 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1809 @echo '' 1740 @echo '' 1810 @echo ' modules - default t 1741 @echo ' modules - default target, build the module(s)' 1811 @echo ' modules_install - install t 1742 @echo ' modules_install - install the module' 1812 @echo ' clean - remove ge 1743 @echo ' clean - remove generated files in module directory only' 1813 @echo ' rust-analyzer - generate << 1814 @echo '' 1744 @echo '' 1815 1745 1816 ifndef CONFIG_MODULES !! 1746 # no-op for external module builds 1817 modules modules_install: __external_modules_e !! 1747 PHONY += modules_prepare 1818 __external_modules_error: << 1819 @echo >&2 '***' << 1820 @echo >&2 '*** The present kernel dis << 1821 @echo >&2 '*** You cannot build or in << 1822 @echo >&2 '***' << 1823 @false << 1824 endif << 1825 1748 1826 endif # KBUILD_EXTMOD 1749 endif # KBUILD_EXTMOD 1827 1750 1828 # ------------------------------------------- 1751 # --------------------------------------------------------------------------- 1829 # Modules 1752 # Modules 1830 1753 1831 PHONY += modules modules_install modules_sign !! 1754 PHONY += modules modules_install 1832 << 1833 modules_install: << 1834 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1835 sign-only=$(if $(filter modules_insta << 1836 << 1837 ifeq ($(CONFIG_MODULE_SIG),y) << 1838 # modules_sign is a subset of modules_install << 1839 # 'make modules_install modules_sign' is equi << 1840 modules_sign: modules_install << 1841 @: << 1842 else << 1843 modules_sign: << 1844 @echo >&2 '***' << 1845 @echo >&2 '*** CONFIG_MODULE_SIG is d << 1846 @echo >&2 '***' << 1847 @false << 1848 endif << 1849 1755 1850 ifdef CONFIG_MODULES 1756 ifdef CONFIG_MODULES 1851 1757 1852 $(MODORDER): $(build-dir) !! 1758 modules: modules_check 1853 @: !! 1759 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1854 << 1855 # KBUILD_MODPOST_NOFINAL can be set to skip t << 1856 # This is solely useful to speed up test comp << 1857 modules: modpost << 1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1) << 1859 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1860 endif << 1861 1760 1862 PHONY += modules_check 1761 PHONY += modules_check 1863 modules_check: $(MODORDER) 1762 modules_check: $(MODORDER) 1864 $(Q)$(CONFIG_SHELL) $(srctree)/script 1763 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 1865 1764 >> 1765 quiet_cmd_depmod = DEPMOD $(MODLIB) >> 1766 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ >> 1767 $(KERNELRELEASE) >> 1768 >> 1769 modules_install: >> 1770 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst >> 1771 $(call cmd,depmod) >> 1772 1866 else # CONFIG_MODULES 1773 else # CONFIG_MODULES 1867 1774 1868 modules: !! 1775 # Modules not configured 1869 @: !! 1776 # --------------------------------------------------------------------------- 1870 1777 1871 KBUILD_MODULES := !! 1778 modules modules_install: >> 1779 @echo >&2 '***' >> 1780 @echo >&2 '*** The present kernel configuration has modules disabled.' >> 1781 @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' >> 1782 @echo >&2 '*** to enable CONFIG_MODULES.' >> 1783 @echo >&2 '***' >> 1784 @exit 1 1872 1785 1873 endif # CONFIG_MODULES 1786 endif # CONFIG_MODULES 1874 1787 1875 PHONY += modpost << 1876 modpost: $(if $(single-build),, $(if $(KBUILD << 1877 $(if $(KBUILD_MODULES), modules_chec << 1878 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1879 << 1880 # Single targets 1788 # Single targets 1881 # ------------------------------------------- 1789 # --------------------------------------------------------------------------- 1882 # To build individual files in subdirectories 1790 # To build individual files in subdirectories, you can do like this: 1883 # 1791 # 1884 # make foo/bar/baz.s 1792 # make foo/bar/baz.s 1885 # 1793 # 1886 # The supported suffixes for single-target ar 1794 # The supported suffixes for single-target are listed in 'single-targets' 1887 # 1795 # 1888 # To build only under specific subdirectories 1796 # To build only under specific subdirectories, you can do like this: 1889 # 1797 # 1890 # make foo/bar/baz/ 1798 # make foo/bar/baz/ 1891 1799 1892 ifdef single-build 1800 ifdef single-build 1893 1801 1894 # .ko is special because modpost is needed 1802 # .ko is special because modpost is needed 1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG 1803 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1896 single-no-ko := $(filter-out $(single-ko), $( !! 1804 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1897 $(foreach x, o mod, $(patsubs << 1898 1805 1899 $(single-ko): single_modules !! 1806 $(single-ko): single_modpost 1900 @: 1807 @: 1901 $(single-no-ko): $(build-dir) !! 1808 $(single-no-ko): descend 1902 @: 1809 @: 1903 1810 1904 # Remove MODORDER when done because it is not !! 1811 ifeq ($(KBUILD_EXTMOD),) 1905 PHONY += single_modules !! 1812 # For the single build of in-tree modules, use a temporary file to avoid 1906 single_modules: $(single-no-ko) modules_prepa !! 1813 # the situation of modules_install installing an invalid modules.order. 1907 $(Q){ $(foreach m, $(single-ko), echo !! 1814 MODORDER := .modules.tmp 1908 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1) << 1910 $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 1911 endif 1815 endif 1912 $(Q)rm -f $(MODORDER) << 1913 1816 1914 single-goals := $(addprefix $(build-dir)/, $( !! 1817 PHONY += single_modpost >> 1818 single_modpost: $(single-no-ko) modules_prepare >> 1819 $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER) >> 1820 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1915 1821 1916 KBUILD_MODULES := 1 1822 KBUILD_MODULES := 1 1917 1823 >> 1824 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko)) >> 1825 >> 1826 # trim unrelated directories >> 1827 build-dirs := $(foreach d, $(build-dirs), \ >> 1828 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) >> 1829 1918 endif 1830 endif 1919 1831 >> 1832 ifndef CONFIG_MODULES >> 1833 KBUILD_MODULES := >> 1834 endif >> 1835 >> 1836 # Handle descending into subdirectories listed in $(build-dirs) 1920 # Preset locale variables to speed up the bui 1837 # Preset locale variables to speed up the build process. Limit locale 1921 # tweaks to this spot to avoid wrong language 1838 # tweaks to this spot to avoid wrong language settings when running 1922 # make menuconfig etc. 1839 # make menuconfig etc. 1923 # Error messages still appears in the origina 1840 # Error messages still appears in the original language 1924 PHONY += $(build-dir) !! 1841 PHONY += descend $(build-dirs) 1925 $(build-dir): prepare !! 1842 descend: $(build-dirs) 1926 $(Q)$(MAKE) $(build)=$@ need-builtin= !! 1843 $(build-dirs): prepare >> 1844 $(Q)$(MAKE) $(build)=$@ \ >> 1845 single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ >> 1846 need-builtin=1 need-modorder=1 1927 1847 1928 clean-dirs := $(addprefix _clean_, $(clean-di 1848 clean-dirs := $(addprefix _clean_, $(clean-dirs)) 1929 PHONY += $(clean-dirs) clean 1849 PHONY += $(clean-dirs) clean 1930 $(clean-dirs): 1850 $(clean-dirs): 1931 $(Q)$(MAKE) $(clean)=$(patsubst _clea 1851 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1932 1852 1933 clean: $(clean-dirs) 1853 clean: $(clean-dirs) 1934 $(call cmd,rmfiles) 1854 $(call cmd,rmfiles) 1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS 1855 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1936 \( -name '*.[aios]' -o -name !! 1856 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1937 -o -name '*.ko.*' \ 1857 -o -name '*.ko.*' \ 1938 -o -name '*.dtb' -o -name '*. !! 1858 -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1939 -o -name '*.dtb.S' -o -name ' << 1940 -o -name '*.dt.yaml' -o -name << 1941 -o -name '*.dwo' -o -name '*. 1859 -o -name '*.dwo' -o -name '*.lst' \ 1942 -o -name '*.su' -o -name '*.m 1860 -o -name '*.su' -o -name '*.mod' \ 1943 -o -name '.*.d' -o -name '.*. 1861 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1944 -o -name '*.lex.c' -o -name ' 1862 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1945 -o -name '*.asn1.[ch]' \ 1863 -o -name '*.asn1.[ch]' \ 1946 -o -name '*.symtypes' -o -nam 1864 -o -name '*.symtypes' -o -name 'modules.order' \ >> 1865 -o -name '.tmp_*.o.*' \ 1947 -o -name '*.c.[012]*.*' \ 1866 -o -name '*.c.[012]*.*' \ 1948 -o -name '*.ll' \ 1867 -o -name '*.ll' \ 1949 -o -name '*.gcno' \ 1868 -o -name '*.gcno' \ 1950 -o -name '*.*.symversions' \) !! 1869 -o -name '*.*.symversions' \) -type f -print | xargs rm -f 1951 -o -name '.tmp_*' -print \ << 1952 | xargs rm -rf << 1953 1870 1954 # Generate tags for editors 1871 # Generate tags for editors 1955 # ------------------------------------------- 1872 # --------------------------------------------------------------------------- 1956 quiet_cmd_tags = GEN $@ 1873 quiet_cmd_tags = GEN $@ 1957 cmd_tags = $(BASH) $(srctree)/scripts/t 1874 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 1958 1875 1959 tags TAGS cscope gtags: FORCE 1876 tags TAGS cscope gtags: FORCE 1960 $(call cmd,tags) 1877 $(call cmd,tags) 1961 1878 1962 # Generate rust-project.json (a file that des << 1963 # Rust projects) for rust-analyzer (an implem << 1964 # Protocol). << 1965 PHONY += rust-analyzer << 1966 rust-analyzer: << 1967 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 1968 $(Q)$(MAKE) $(build)=rust $@ << 1969 << 1970 # Script to generate missing namespace depend 1879 # Script to generate missing namespace dependencies 1971 # ------------------------------------------- 1880 # --------------------------------------------------------------------------- 1972 1881 1973 PHONY += nsdeps 1882 PHONY += nsdeps 1974 nsdeps: export KBUILD_NSDEPS=1 1883 nsdeps: export KBUILD_NSDEPS=1 1975 nsdeps: modules 1884 nsdeps: modules 1976 $(Q)$(CONFIG_SHELL) $(srctree)/script 1885 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1977 1886 1978 # Clang Tooling 1887 # Clang Tooling 1979 # ------------------------------------------- 1888 # --------------------------------------------------------------------------- 1980 1889 1981 quiet_cmd_gen_compile_commands = GEN $@ 1890 quiet_cmd_gen_compile_commands = GEN $@ 1982 cmd_gen_compile_commands = $(PYTHON3) $ 1891 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 1983 1892 1984 $(extmod_prefix)compile_commands.json: $(srct !! 1893 $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ 1985 $(if $(KBUILD_EXTMOD),, vmlinux.a $(K !! 1894 $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ 1986 $(if $(CONFIG_MODULES), $(MODORDER)) 1895 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE 1987 $(call if_changed,gen_compile_command 1896 $(call if_changed,gen_compile_commands) 1988 1897 1989 targets += $(extmod_prefix)compile_commands.j 1898 targets += $(extmod_prefix)compile_commands.json 1990 1899 1991 PHONY += clang-tidy clang-analyzer 1900 PHONY += clang-tidy clang-analyzer 1992 1901 1993 ifdef CONFIG_CC_IS_CLANG 1902 ifdef CONFIG_CC_IS_CLANG 1994 quiet_cmd_clang_tools = CHECK $< 1903 quiet_cmd_clang_tools = CHECK $< 1995 cmd_clang_tools = $(PYTHON3) $(srctree) 1904 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 1996 1905 1997 clang-tidy clang-analyzer: $(extmod_prefix)co 1906 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json 1998 $(call cmd,clang_tools) 1907 $(call cmd,clang_tools) 1999 else 1908 else 2000 clang-tidy clang-analyzer: 1909 clang-tidy clang-analyzer: 2001 @echo "$@ requires CC=clang" >&2 1910 @echo "$@ requires CC=clang" >&2 2002 @false 1911 @false 2003 endif 1912 endif 2004 1913 2005 # Scripts to check various things for consist 1914 # Scripts to check various things for consistency 2006 # ------------------------------------------- 1915 # --------------------------------------------------------------------------- 2007 1916 2008 PHONY += includecheck versioncheck coccicheck 1917 PHONY += includecheck versioncheck coccicheck export_report 2009 1918 2010 includecheck: 1919 includecheck: 2011 find $(srctree)/* $(RCS_FIND_IGNORE) 1920 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2012 -name '*.[hcS]' -type f -prin 1921 -name '*.[hcS]' -type f -print | sort \ 2013 | xargs $(PERL) -w $(srctree) 1922 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 2014 1923 2015 versioncheck: 1924 versioncheck: 2016 find $(srctree)/* $(RCS_FIND_IGNORE) 1925 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2017 -name '*.[hcS]' -type f -prin 1926 -name '*.[hcS]' -type f -print | sort \ 2018 | xargs $(PERL) -w $(srctree) 1927 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 2019 1928 2020 coccicheck: 1929 coccicheck: 2021 $(Q)$(BASH) $(srctree)/scripts/$@ 1930 $(Q)$(BASH) $(srctree)/scripts/$@ 2022 1931 2023 export_report: 1932 export_report: 2024 $(PERL) $(srctree)/scripts/export_rep 1933 $(PERL) $(srctree)/scripts/export_report.pl 2025 1934 2026 PHONY += checkstack kernelrelease kernelversi 1935 PHONY += checkstack kernelrelease kernelversion image_name 2027 1936 2028 # UML needs a little special treatment here. 1937 # UML needs a little special treatment here. It wants to use the host 2029 # toolchain, so needs $(SUBARCH) passed to ch 1938 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2030 # else wants $(ARCH), including people doing 1939 # else wants $(ARCH), including people doing cross-builds, which means 2031 # that $(SUBARCH) doesn't work here. 1940 # that $(SUBARCH) doesn't work here. 2032 ifeq ($(ARCH), um) 1941 ifeq ($(ARCH), um) 2033 CHECKSTACK_ARCH := $(SUBARCH) 1942 CHECKSTACK_ARCH := $(SUBARCH) 2034 else 1943 else 2035 CHECKSTACK_ARCH := $(ARCH) 1944 CHECKSTACK_ARCH := $(ARCH) 2036 endif 1945 endif 2037 MINSTACKSIZE ?= 100 << 2038 checkstack: 1946 checkstack: 2039 $(OBJDUMP) -d vmlinux $$(find . -name 1947 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 2040 $(PERL) $(srctree)/scripts/checkstack !! 1948 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 2041 1949 2042 kernelrelease: 1950 kernelrelease: 2043 @$(filechk_kernel.release) !! 1951 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 2044 1952 2045 kernelversion: 1953 kernelversion: 2046 @echo $(KERNELVERSION) 1954 @echo $(KERNELVERSION) 2047 1955 2048 image_name: 1956 image_name: 2049 @echo $(KBUILD_IMAGE) 1957 @echo $(KBUILD_IMAGE) 2050 << 2051 PHONY += run-command << 2052 run-command: << 2053 $(Q)$(KBUILD_RUN_COMMAND) << 2054 1958 2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 1959 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 2056 cmd_rmfiles = rm -rf $(rm-files) 1960 cmd_rmfiles = rm -rf $(rm-files) 2057 1961 2058 # read saved command lines for existing targe 1962 # read saved command lines for existing targets 2059 existing-targets := $(wildcard $(sort $(targe 1963 existing-targets := $(wildcard $(sort $(targets))) 2060 1964 2061 -include $(foreach f,$(existing-targets),$(di 1965 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 2062 1966 2063 endif # config-build 1967 endif # config-build 2064 endif # mixed-build 1968 endif # mixed-build 2065 endif # need-sub-make 1969 endif # need-sub-make 2066 1970 2067 PHONY += FORCE 1971 PHONY += FORCE 2068 FORCE: 1972 FORCE: 2069 1973 2070 # Declare the contents of the PHONY variable 1974 # Declare the contents of the PHONY variable as phony. We keep that 2071 # information in a variable so we can use it 1975 # information in a variable so we can use it in if_changed and friends. 2072 .PHONY: $(PHONY) 1976 .PHONY: $(PHONY)
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