| 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | VERSION = 5 |
| 3 | PATCHLEVEL = 15 |
| 4 | SUBLEVEL = 0 |
| 5 | EXTRAVERSION = -rc2 |
| 6 | NAME = Opossums on Parade |
| 7 | |
| 8 | # *DOCUMENTATION* |
| 9 | # To see a list of typical targets execute "make help" |
| 10 | # More info can be located in ./README |
| 11 | # Comments in this file are targeted only to the developer, do not |
| 12 | # expect to learn how to build the kernel reading this file. |
| 13 | |
| 14 | $(if $(filter __%, $(MAKECMDGOALS)), \ |
| 15 | $(error targets prefixed with '__' are only for internal use)) |
| 16 | |
| 17 | # That's our default target when none is given on the command line |
| 18 | PHONY := __all |
| 19 | __all: |
| 20 | |
| 21 | # We are using a recursive build, so we need to do a little thinking |
| 22 | # to get the ordering right. |
| 23 | # |
| 24 | # Most importantly: sub-Makefiles should only ever modify files in |
| 25 | # their own directory. If in some directory we have a dependency on |
| 26 | # a file in another dir (which doesn't happen often, but it's often |
| 27 | # unavoidable when linking the built-in.a targets which finally |
| 28 | # turn into vmlinux), we will call a sub make in that other dir, and |
| 29 | # after that we are sure that everything which is in that other dir |
| 30 | # is now up to date. |
| 31 | # |
| 32 | # The only cases where we need to modify files which have global |
| 33 | # effects are thus separated out and done before the recursive |
| 34 | # descending is started. They are now explicitly listed as the |
| 35 | # prepare rule. |
| 36 | |
| 37 | ifneq ($(sub_make_done),1) |
| 38 | |
| 39 | # Do not use make's built-in rules and variables |
| 40 | # (this increases performance and avoids hard-to-debug behaviour) |
| 41 | MAKEFLAGS += -rR |
| 42 | |
| 43 | # Avoid funny character set dependencies |
| 44 | unexport LC_ALL |
| 45 | LC_COLLATE=C |
| 46 | LC_NUMERIC=C |
| 47 | export LC_COLLATE LC_NUMERIC |
| 48 | |
| 49 | # Avoid interference with shell env settings |
| 50 | unexport GREP_OPTIONS |
| 51 | |
| 52 | # Beautify output |
| 53 | # --------------------------------------------------------------------------- |
| 54 | # |
| 55 | # Normally, we echo the whole command before executing it. By making |
| 56 | # that echo $($(quiet)$(cmd)), we now have the possibility to set |
| 57 | # $(quiet) to choose other forms of output instead, e.g. |
| 58 | # |
| 59 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
| 60 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| 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. |
| 66 | # |
| 67 | # A simple variant is to prefix commands with $(Q) - that's useful |
| 68 | # for commands that shall be hidden in non-verbose mode. |
| 69 | # |
| 70 | # $(Q)ln $@ :< |
| 71 | # |
| 72 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
| 73 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
| 74 | # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. |
| 75 | # |
| 76 | # To put more focus on warnings, be less verbose as default |
| 77 | # Use 'make V=1' to see the full commands |
| 78 | |
| 79 | ifeq ("$(origin V)", "command line") |
| 80 | KBUILD_VERBOSE = $(V) |
| 81 | endif |
| 82 | ifndef KBUILD_VERBOSE |
| 83 | KBUILD_VERBOSE = 0 |
| 84 | endif |
| 85 | |
| 86 | ifeq ($(KBUILD_VERBOSE),1) |
| 87 | quiet = |
| 88 | Q = |
| 89 | else |
| 90 | quiet=quiet_ |
| 91 | Q = @ |
| 92 | endif |
| 93 | |
| 94 | # If the user is running make -s (silent mode), suppress echoing of |
| 95 | # commands |
| 96 | |
| 97 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
| 98 | quiet=silent_ |
| 99 | KBUILD_VERBOSE = 0 |
| 100 | endif |
| 101 | |
| 102 | export quiet Q KBUILD_VERBOSE |
| 103 | |
| 104 | # Call a source code checker (by default, "sparse") as part of the |
| 105 | # C compilation. |
| 106 | # |
| 107 | # Use 'make C=1' to enable checking of only re-compiled files. |
| 108 | # Use 'make C=2' to enable checking of *all* source files, regardless |
| 109 | # of whether they are re-compiled or not. |
| 110 | # |
| 111 | # See the file "Documentation/dev-tools/sparse.rst" for more details, |
| 112 | # including where to get the "sparse" utility. |
| 113 | |
| 114 | ifeq ("$(origin C)", "command line") |
| 115 | KBUILD_CHECKSRC = $(C) |
| 116 | endif |
| 117 | ifndef KBUILD_CHECKSRC |
| 118 | KBUILD_CHECKSRC = 0 |
| 119 | endif |
| 120 | |
| 121 | export KBUILD_CHECKSRC |
| 122 | |
| 123 | # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the |
| 124 | # directory of external module to build. Setting M= takes precedence. |
| 125 | ifeq ("$(origin M)", "command line") |
| 126 | KBUILD_EXTMOD := $(M) |
| 127 | endif |
| 128 | |
| 129 | $(if $(word 2, $(KBUILD_EXTMOD)), \ |
| 130 | $(error building multiple external modules is not supported)) |
| 131 | |
| 132 | # Remove trailing slashes |
| 133 | ifneq ($(filter %/, $(KBUILD_EXTMOD)),) |
| 134 | KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) |
| 135 | endif |
| 136 | |
| 137 | export KBUILD_EXTMOD |
| 138 | |
| 139 | # Kbuild will save output files in the current working directory. |
| 140 | # This does not need to match to the root of the kernel source tree. |
| 141 | # |
| 142 | # For example, you can do this: |
| 143 | # |
| 144 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile |
| 145 | # |
| 146 | # If you want to save output files in a different location, there are |
| 147 | # two syntaxes to specify it. |
| 148 | # |
| 149 | # 1) O= |
| 150 | # Use "make O=dir/to/store/output/files/" |
| 151 | # |
| 152 | # 2) Set KBUILD_OUTPUT |
| 153 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. |
| 154 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make |
| 155 | # |
| 156 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment |
| 157 | # variable. |
| 158 | |
| 159 | # Do we want to change the working directory? |
| 160 | ifeq ("$(origin O)", "command line") |
| 161 | KBUILD_OUTPUT := $(O) |
| 162 | endif |
| 163 | |
| 164 | ifneq ($(KBUILD_OUTPUT),) |
| 165 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot |
| 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 | |
| 171 | # $(realpath ...) resolves symlinks |
| 172 | abs_objtree := $(realpath $(abs_objtree)) |
| 173 | else |
| 174 | abs_objtree := $(CURDIR) |
| 175 | endif # ifneq ($(KBUILD_OUTPUT),) |
| 176 | |
| 177 | ifeq ($(abs_objtree),$(CURDIR)) |
| 178 | # Suppress "Entering directory ..." unless we are changing the work directory. |
| 179 | MAKEFLAGS += --no-print-directory |
| 180 | else |
| 181 | need-sub-make := 1 |
| 182 | endif |
| 183 | |
| 184 | this-makefile := $(lastword $(MAKEFILE_LIST)) |
| 185 | abs_srctree := $(realpath $(dir $(this-makefile))) |
| 186 | |
| 187 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) |
| 188 | $(error source directory cannot contain spaces or colons) |
| 189 | endif |
| 190 | |
| 191 | ifneq ($(abs_srctree),$(abs_objtree)) |
| 192 | # Look for make include files relative to root of kernel src |
| 193 | # |
| 194 | # --included-dir is added for backward compatibility, but you should not rely on |
| 195 | # it. Please add $(srctree)/ prefix to include Makefiles in the source tree. |
| 196 | MAKEFLAGS += --include-dir=$(abs_srctree) |
| 197 | endif |
| 198 | |
| 199 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
| 200 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x |
| 201 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. |
| 202 | need-sub-make := 1 |
| 203 | # Cancel implicit rules for this Makefile. |
| 204 | $(this-makefile): ; |
| 205 | endif |
| 206 | |
| 207 | export abs_srctree abs_objtree |
| 208 | export sub_make_done := 1 |
| 209 | |
| 210 | ifeq ($(need-sub-make),1) |
| 211 | |
| 212 | PHONY += $(MAKECMDGOALS) __sub-make |
| 213 | |
| 214 | $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make |
| 215 | @: |
| 216 | |
| 217 | # Invoke a second make in the output directory, passing relevant variables |
| 218 | __sub-make: |
| 219 | $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) |
| 220 | |
| 221 | endif # need-sub-make |
| 222 | endif # sub_make_done |
| 223 | |
| 224 | # We process the rest of the Makefile if this is the final invocation of make |
| 225 | ifeq ($(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 |
| 231 | |
| 232 | ifeq ($(abs_srctree),$(abs_objtree)) |
| 233 | # building in the source tree |
| 234 | srctree := . |
| 235 | building_out_of_srctree := |
| 236 | else |
| 237 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) |
| 238 | # building in a subdirectory of the source tree |
| 239 | srctree := .. |
| 240 | else |
| 241 | srctree := $(abs_srctree) |
| 242 | endif |
| 243 | building_out_of_srctree := 1 |
| 244 | endif |
| 245 | |
| 246 | ifneq ($(KBUILD_ABS_SRCTREE),) |
| 247 | srctree := $(abs_srctree) |
| 248 | endif |
| 249 | |
| 250 | objtree := . |
| 251 | VPATH := $(srctree) |
| 252 | |
| 253 | export building_out_of_srctree srctree objtree VPATH |
| 254 | |
| 255 | # To make sure we do not include .config for any of the *config targets |
| 256 | # catch them early, and hand them over to scripts/kconfig/Makefile |
| 257 | # It is allowed to specify more targets when calling make, including |
| 258 | # mixing *config targets and build targets. |
| 259 | # For example 'make oldconfig all'. |
| 260 | # Detect when mixed targets is specified, and make a second invocation |
| 261 | # of make so .config is not included in this case either (for *config). |
| 262 | |
| 263 | version_h := include/generated/uapi/linux/version.h |
| 264 | |
| 265 | clean-targets := %clean mrproper cleandocs |
| 266 | no-dot-config-targets := $(clean-targets) \ |
| 267 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
| 268 | $(version_h) headers headers_% archheaders archscripts \ |
| 269 | %asm-generic kernelversion %src-pkg dt_binding_check \ |
| 270 | outputmakefile |
| 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 := $(no-dot-config-targets) %install kernelrelease \ |
| 276 | image_name |
| 277 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ |
| 278 | |
| 279 | config-build := |
| 280 | mixed-build := |
| 281 | need-config := 1 |
| 282 | need-compiler := 1 |
| 283 | may-sync-config := 1 |
| 284 | single-build := |
| 285 | |
| 286 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| 287 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| 288 | need-config := |
| 289 | endif |
| 290 | endif |
| 291 | |
| 292 | ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) |
| 293 | ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) |
| 294 | need-compiler := |
| 295 | endif |
| 296 | endif |
| 297 | |
| 298 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| 299 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| 300 | may-sync-config := |
| 301 | endif |
| 302 | endif |
| 303 | |
| 304 | ifneq ($(KBUILD_EXTMOD),) |
| 305 | may-sync-config := |
| 306 | endif |
| 307 | |
| 308 | ifeq ($(KBUILD_EXTMOD),) |
| 309 | ifneq ($(filter %config,$(MAKECMDGOALS)),) |
| 310 | config-build := 1 |
| 311 | ifneq ($(words $(MAKECMDGOALS)),1) |
| 312 | mixed-build := 1 |
| 313 | endif |
| 314 | endif |
| 315 | endif |
| 316 | |
| 317 | # We cannot build single targets and the others at the same time |
| 318 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) |
| 319 | single-build := 1 |
| 320 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) |
| 321 | mixed-build := 1 |
| 322 | endif |
| 323 | endif |
| 324 | |
| 325 | # For "make -j clean all", "make -j mrproper defconfig all", etc. |
| 326 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) |
| 327 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) |
| 328 | mixed-build := 1 |
| 329 | endif |
| 330 | endif |
| 331 | |
| 332 | # install and modules_install need also be processed one by one |
| 333 | ifneq ($(filter install,$(MAKECMDGOALS)),) |
| 334 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) |
| 335 | mixed-build := 1 |
| 336 | endif |
| 337 | endif |
| 338 | |
| 339 | ifdef mixed-build |
| 340 | # =========================================================================== |
| 341 | # We're called with mixed targets (*config and build targets). |
| 342 | # Handle them one by one. |
| 343 | |
| 344 | PHONY += $(MAKECMDGOALS) __build_one_by_one |
| 345 | |
| 346 | $(MAKECMDGOALS): __build_one_by_one |
| 347 | @: |
| 348 | |
| 349 | __build_one_by_one: |
| 350 | $(Q)set -e; \ |
| 351 | for i in $(MAKECMDGOALS); do \ |
| 352 | $(MAKE) -f $(srctree)/Makefile $$i; \ |
| 353 | done |
| 354 | |
| 355 | else # !mixed-build |
| 356 | |
| 357 | include $(srctree)/scripts/Kbuild.include |
| 358 | |
| 359 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
| 360 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) |
| 361 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
| 362 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
| 363 | |
| 364 | include $(srctree)/scripts/subarch.include |
| 365 | |
| 366 | # Cross compiling and selecting different set of gcc/bin-utils |
| 367 | # --------------------------------------------------------------------------- |
| 368 | # |
| 369 | # When performing cross compilation for other architectures ARCH shall be set |
| 370 | # to the target architecture. (See arch/* for the possibilities). |
| 371 | # ARCH can be set during invocation of make: |
| 372 | # make ARCH=ia64 |
| 373 | # Another way is to have ARCH set in the environment. |
| 374 | # The default ARCH is the host where make is executed. |
| 375 | |
| 376 | # CROSS_COMPILE specify the prefix used for all executables used |
| 377 | # during compilation. Only gcc and related bin-utils executables |
| 378 | # are prefixed with $(CROSS_COMPILE). |
| 379 | # CROSS_COMPILE can be set on the command line |
| 380 | # make CROSS_COMPILE=ia64-linux- |
| 381 | # Alternatively CROSS_COMPILE can be set in the environment. |
| 382 | # Default value for CROSS_COMPILE is not to prefix executables |
| 383 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
| 384 | ARCH ?= $(SUBARCH) |
| 385 | |
| 386 | # Architecture as present in compile.h |
| 387 | UTS_MACHINE := $(ARCH) |
| 388 | SRCARCH := $(ARCH) |
| 389 | |
| 390 | # Additional ARCH settings for x86 |
| 391 | ifeq ($(ARCH),i386) |
| 392 | SRCARCH := x86 |
| 393 | endif |
| 394 | ifeq ($(ARCH),x86_64) |
| 395 | SRCARCH := x86 |
| 396 | endif |
| 397 | |
| 398 | # Additional ARCH settings for sparc |
| 399 | ifeq ($(ARCH),sparc32) |
| 400 | SRCARCH := sparc |
| 401 | endif |
| 402 | ifeq ($(ARCH),sparc64) |
| 403 | SRCARCH := sparc |
| 404 | endif |
| 405 | |
| 406 | # Additional ARCH settings for parisc |
| 407 | ifeq ($(ARCH),parisc64) |
| 408 | SRCARCH := parisc |
| 409 | endif |
| 410 | |
| 411 | export cross_compiling := |
| 412 | ifneq ($(SRCARCH),$(SUBARCH)) |
| 413 | cross_compiling := 1 |
| 414 | endif |
| 415 | |
| 416 | KCONFIG_CONFIG ?= .config |
| 417 | export KCONFIG_CONFIG |
| 418 | |
| 419 | # SHELL used by kbuild |
| 420 | CONFIG_SHELL := sh |
| 421 | |
| 422 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
| 423 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) |
| 424 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) |
| 425 | |
| 426 | ifneq ($(LLVM),) |
| 427 | HOSTCC = clang |
| 428 | HOSTCXX = clang++ |
| 429 | else |
| 430 | HOSTCC = gcc |
| 431 | HOSTCXX = g++ |
| 432 | endif |
| 433 | |
| 434 | export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ |
| 435 | -O2 -fomit-frame-pointer -std=gnu89 |
| 436 | export KBUILD_USERLDFLAGS := |
| 437 | |
| 438 | KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) |
| 439 | KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) |
| 440 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) |
| 441 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) |
| 442 | |
| 443 | # Make variables (CC, etc...) |
| 444 | CPP = $(CC) -E |
| 445 | ifneq ($(LLVM),) |
| 446 | CC = clang |
| 447 | LD = ld.lld |
| 448 | AR = llvm-ar |
| 449 | NM = llvm-nm |
| 450 | OBJCOPY = llvm-objcopy |
| 451 | OBJDUMP = llvm-objdump |
| 452 | READELF = llvm-readelf |
| 453 | STRIP = llvm-strip |
| 454 | else |
| 455 | CC = $(CROSS_COMPILE)gcc |
| 456 | LD = $(CROSS_COMPILE)ld |
| 457 | AR = $(CROSS_COMPILE)ar |
| 458 | NM = $(CROSS_COMPILE)nm |
| 459 | OBJCOPY = $(CROSS_COMPILE)objcopy |
| 460 | OBJDUMP = $(CROSS_COMPILE)objdump |
| 461 | READELF = $(CROSS_COMPILE)readelf |
| 462 | STRIP = $(CROSS_COMPILE)strip |
| 463 | endif |
| 464 | PAHOLE = pahole |
| 465 | RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids |
| 466 | LEX = flex |
| 467 | YACC = bison |
| 468 | AWK = awk |
| 469 | INSTALLKERNEL := installkernel |
| 470 | DEPMOD = depmod |
| 471 | PERL = perl |
| 472 | PYTHON3 = python3 |
| 473 | CHECK = sparse |
| 474 | BASH = bash |
| 475 | KGZIP = gzip |
| 476 | KBZIP2 = bzip2 |
| 477 | KLZOP = lzop |
| 478 | LZMA = lzma |
| 479 | LZ4 = lz4c |
| 480 | XZ = xz |
| 481 | ZSTD = zstd |
| 482 | |
| 483 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
| 484 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
| 485 | NOSTDINC_FLAGS := |
| 486 | CFLAGS_MODULE = |
| 487 | AFLAGS_MODULE = |
| 488 | LDFLAGS_MODULE = |
| 489 | CFLAGS_KERNEL = |
| 490 | AFLAGS_KERNEL = |
| 491 | LDFLAGS_vmlinux = |
| 492 | |
| 493 | # Use USERINCLUDE when you must reference the UAPI directories only. |
| 494 | USERINCLUDE := \ |
| 495 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
| 496 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ |
| 497 | -I$(srctree)/include/uapi \ |
| 498 | -I$(objtree)/include/generated/uapi \ |
| 499 | -include $(srctree)/include/linux/compiler-version.h \ |
| 500 | -include $(srctree)/include/linux/kconfig.h |
| 501 | |
| 502 | # Use LINUXINCLUDE when you must reference the include/ directory. |
| 503 | # Needed to be compatible with the O= option |
| 504 | LINUXINCLUDE := \ |
| 505 | -I$(srctree)/arch/$(SRCARCH)/include \ |
| 506 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ |
| 507 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ |
| 508 | -I$(objtree)/include \ |
| 509 | $(USERINCLUDE) |
| 510 | |
| 511 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
| 512 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
| 513 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
| 514 | -Werror=implicit-function-declaration -Werror=implicit-int \ |
| 515 | -Werror=return-type -Wno-format-security \ |
| 516 | -std=gnu89 |
| 517 | KBUILD_CPPFLAGS := -D__KERNEL__ |
| 518 | KBUILD_AFLAGS_KERNEL := |
| 519 | KBUILD_CFLAGS_KERNEL := |
| 520 | KBUILD_AFLAGS_MODULE := -DMODULE |
| 521 | KBUILD_CFLAGS_MODULE := -DMODULE |
| 522 | KBUILD_LDFLAGS_MODULE := |
| 523 | KBUILD_LDFLAGS := |
| 524 | CLANG_FLAGS := |
| 525 | |
| 526 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC |
| 527 | export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL |
| 528 | export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX |
| 529 | export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD |
| 530 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE |
| 531 | |
| 532 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
| 533 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
| 534 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
| 535 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
| 536 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
| 537 | |
| 538 | # Files to ignore in find ... statements |
| 539 | |
| 540 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
| 541 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ |
| 542 | -prune -o |
| 543 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
| 544 | --exclude CVS --exclude .pc --exclude .hg --exclude .git |
| 545 | |
| 546 | # =========================================================================== |
| 547 | # Rules shared between *config targets and build targets |
| 548 | |
| 549 | # Basic helpers built in scripts/basic/ |
| 550 | PHONY += scripts_basic |
| 551 | scripts_basic: |
| 552 | $(Q)$(MAKE) $(build)=scripts/basic |
| 553 | |
| 554 | PHONY += outputmakefile |
| 555 | ifdef building_out_of_srctree |
| 556 | # Before starting out-of-tree build, make sure the source tree is clean. |
| 557 | # outputmakefile generates a Makefile in the output directory, if using a |
| 558 | # separate output directory. This allows convenient use of make in the |
| 559 | # output directory. |
| 560 | # At the same time when output Makefile generated, generate .gitignore to |
| 561 | # ignore whole output directory |
| 562 | |
| 563 | quiet_cmd_makefile = GEN Makefile |
| 564 | cmd_makefile = { \ |
| 565 | echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ |
| 566 | echo "include $(srctree)/Makefile"; \ |
| 567 | } > Makefile |
| 568 | |
| 569 | outputmakefile: |
| 570 | $(Q)if [ -f $(srctree)/.config -o \ |
| 571 | -d $(srctree)/include/config -o \ |
| 572 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ |
| 573 | echo >&2 "***"; \ |
| 574 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ |
| 575 | echo >&2 "*** in $(abs_srctree)";\ |
| 576 | echo >&2 "***"; \ |
| 577 | false; \ |
| 578 | fi |
| 579 | $(Q)ln -fsn $(srctree) source |
| 580 | $(call cmd,makefile) |
| 581 | $(Q)test -e .gitignore || \ |
| 582 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore |
| 583 | endif |
| 584 | |
| 585 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
| 586 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. |
| 587 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), |
| 588 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. |
| 589 | CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) |
| 590 | |
| 591 | ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) |
| 592 | include $(srctree)/scripts/Makefile.clang |
| 593 | endif |
| 594 | |
| 595 | # Include this also for config targets because some architectures need |
| 596 | # cc-cross-prefix to determine CROSS_COMPILE. |
| 597 | ifdef need-compiler |
| 598 | include $(srctree)/scripts/Makefile.compiler |
| 599 | endif |
| 600 | |
| 601 | ifdef config-build |
| 602 | # =========================================================================== |
| 603 | # *config targets only - make sure prerequisites are updated, and descend |
| 604 | # in scripts/kconfig to make the *config target |
| 605 | |
| 606 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
| 607 | # KBUILD_DEFCONFIG may point out an alternative default configuration |
| 608 | # used for 'make defconfig' |
| 609 | include $(srctree)/arch/$(SRCARCH)/Makefile |
| 610 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
| 611 | |
| 612 | config: outputmakefile scripts_basic FORCE |
| 613 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| 614 | |
| 615 | %config: outputmakefile scripts_basic FORCE |
| 616 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| 617 | |
| 618 | else #!config-build |
| 619 | # =========================================================================== |
| 620 | # Build targets only - this includes vmlinux, arch specific targets, clean |
| 621 | # targets and others. In general all targets except *config targets. |
| 622 | |
| 623 | # If building an external module we do not care about the all: rule |
| 624 | # but instead __all depend on modules |
| 625 | PHONY += all |
| 626 | ifeq ($(KBUILD_EXTMOD),) |
| 627 | __all: all |
| 628 | else |
| 629 | __all: modules |
| 630 | endif |
| 631 | |
| 632 | # Decide whether to build built-in, modular, or both. |
| 633 | # Normally, just do built-in. |
| 634 | |
| 635 | KBUILD_MODULES := |
| 636 | KBUILD_BUILTIN := 1 |
| 637 | |
| 638 | # If we have only "make modules", don't compile built-in objects. |
| 639 | ifeq ($(MAKECMDGOALS),modules) |
| 640 | KBUILD_BUILTIN := |
| 641 | endif |
| 642 | |
| 643 | # If we have "make <whatever> modules", compile modules |
| 644 | # in addition to whatever we do anyway. |
| 645 | # Just "make" or "make all" shall build modules as well |
| 646 | |
| 647 | ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) |
| 648 | KBUILD_MODULES := 1 |
| 649 | endif |
| 650 | |
| 651 | ifeq ($(MAKECMDGOALS),) |
| 652 | KBUILD_MODULES := 1 |
| 653 | endif |
| 654 | |
| 655 | export KBUILD_MODULES KBUILD_BUILTIN |
| 656 | |
| 657 | ifdef need-config |
| 658 | include include/config/auto.conf |
| 659 | endif |
| 660 | |
| 661 | ifeq ($(KBUILD_EXTMOD),) |
| 662 | # Objects we will link into vmlinux / subdirs we need to visit |
| 663 | core-y := init/ usr/ arch/$(SRCARCH)/ |
| 664 | drivers-y := drivers/ sound/ |
| 665 | drivers-$(CONFIG_SAMPLES) += samples/ |
| 666 | drivers-$(CONFIG_NET) += net/ |
| 667 | drivers-y += virt/ |
| 668 | libs-y := lib/ |
| 669 | endif # KBUILD_EXTMOD |
| 670 | |
| 671 | # The all: target is the default when no target is given on the |
| 672 | # command line. |
| 673 | # This allow a user to issue only 'make' to build a kernel including modules |
| 674 | # Defaults to vmlinux, but the arch makefile usually adds further targets |
| 675 | all: vmlinux |
| 676 | |
| 677 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage |
| 678 | ifdef CONFIG_CC_IS_GCC |
| 679 | CFLAGS_GCOV += -fno-tree-loop-im |
| 680 | endif |
| 681 | export CFLAGS_GCOV |
| 682 | |
| 683 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
| 684 | ifdef CONFIG_FUNCTION_TRACER |
| 685 | CC_FLAGS_FTRACE := -pg |
| 686 | endif |
| 687 | |
| 688 | ifdef CONFIG_CC_IS_GCC |
| 689 | RETPOLINE_CFLAGS := $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register) |
| 690 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register) |
| 691 | endif |
| 692 | ifdef CONFIG_CC_IS_CLANG |
| 693 | RETPOLINE_CFLAGS := -mretpoline-external-thunk |
| 694 | RETPOLINE_VDSO_CFLAGS := -mretpoline |
| 695 | endif |
| 696 | export RETPOLINE_CFLAGS |
| 697 | export RETPOLINE_VDSO_CFLAGS |
| 698 | |
| 699 | include $(srctree)/arch/$(SRCARCH)/Makefile |
| 700 | |
| 701 | ifdef need-config |
| 702 | ifdef may-sync-config |
| 703 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
| 704 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile |
| 705 | # because some architectures define CROSS_COMPILE there. |
| 706 | include include/config/auto.conf.cmd |
| 707 | |
| 708 | $(KCONFIG_CONFIG): |
| 709 | @echo >&2 '***' |
| 710 | @echo >&2 '*** Configuration file "$@" not found!' |
| 711 | @echo >&2 '***' |
| 712 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' |
| 713 | @echo >&2 '*** "make menuconfig" or "make xconfig").' |
| 714 | @echo >&2 '***' |
| 715 | @/bin/false |
| 716 | |
| 717 | # The actual configuration files used during the build are stored in |
| 718 | # include/generated/ and include/config/. Update them if .config is newer than |
| 719 | # include/config/auto.conf (which mirrors .config). |
| 720 | # |
| 721 | # This exploits the 'multi-target pattern rule' trick. |
| 722 | # The syncconfig should be executed only once to make all the targets. |
| 723 | # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) |
| 724 | # |
| 725 | # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, |
| 726 | # so you cannot notice that Kconfig is waiting for the user input. |
| 727 | %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) |
| 728 | $(Q)$(kecho) " SYNC $@" |
| 729 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
| 730 | else # !may-sync-config |
| 731 | # External modules and some install targets need include/generated/autoconf.h |
| 732 | # and include/config/auto.conf but do not care if they are up-to-date. |
| 733 | # Use auto.conf to trigger the test |
| 734 | PHONY += include/config/auto.conf |
| 735 | |
| 736 | include/config/auto.conf: |
| 737 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
| 738 | echo >&2; \ |
| 739 | echo >&2 " ERROR: Kernel configuration is invalid."; \ |
| 740 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ |
| 741 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ |
| 742 | echo >&2 ; \ |
| 743 | /bin/false) |
| 744 | |
| 745 | endif # may-sync-config |
| 746 | endif # need-config |
| 747 | |
| 748 | KBUILD_CFLAGS += -fno-delete-null-pointer-checks |
| 749 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
| 750 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
| 751 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) |
| 752 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
| 753 | |
| 754 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE |
| 755 | KBUILD_CFLAGS += -O2 |
| 756 | else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 |
| 757 | KBUILD_CFLAGS += -O3 |
| 758 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
| 759 | KBUILD_CFLAGS += -Os |
| 760 | endif |
| 761 | |
| 762 | # Tell gcc to never replace conditional load with a non-conditional one |
| 763 | ifdef CONFIG_CC_IS_GCC |
| 764 | # gcc-10 renamed --param=allow-store-data-races=0 to |
| 765 | # -fno-allow-store-data-races. |
| 766 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) |
| 767 | KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) |
| 768 | endif |
| 769 | |
| 770 | ifdef CONFIG_READABLE_ASM |
| 771 | # Disable optimizations that make assembler listings hard to read. |
| 772 | # reorder blocks reorders the control in the function |
| 773 | # ipa clone creates specialized cloned functions |
| 774 | # partial inlining inlines only parts of functions |
| 775 | KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining |
| 776 | endif |
| 777 | |
| 778 | ifneq ($(CONFIG_FRAME_WARN),0) |
| 779 | KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) |
| 780 | endif |
| 781 | |
| 782 | stackp-flags-y := -fno-stack-protector |
| 783 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
| 784 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong |
| 785 | |
| 786 | KBUILD_CFLAGS += $(stackp-flags-y) |
| 787 | |
| 788 | KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror |
| 789 | KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) |
| 790 | |
| 791 | ifdef CONFIG_CC_IS_CLANG |
| 792 | KBUILD_CPPFLAGS += -Qunused-arguments |
| 793 | # The kernel builds with '-std=gnu89' so use of GNU extensions is acceptable. |
| 794 | KBUILD_CFLAGS += -Wno-gnu |
| 795 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the |
| 796 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. |
| 797 | # See modpost pattern 2 |
| 798 | KBUILD_CFLAGS += -mno-global-merge |
| 799 | else |
| 800 | |
| 801 | # Warn about unmarked fall-throughs in switch statement. |
| 802 | # Disabled for clang while comment to attribute conversion happens and |
| 803 | # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. |
| 804 | KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=5,) |
| 805 | # gcc inanely warns about local variables called 'main' |
| 806 | KBUILD_CFLAGS += -Wno-main |
| 807 | endif |
| 808 | |
| 809 | # These warnings generated too much noise in a regular build. |
| 810 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) |
| 811 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) |
| 812 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
| 813 | |
| 814 | ifdef CONFIG_FRAME_POINTER |
| 815 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
| 816 | else |
| 817 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
| 818 | # pointers. For those, we don't have FUNCTION_TRACER automatically |
| 819 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is |
| 820 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use |
| 821 | # -fomit-frame-pointer with FUNCTION_TRACER. |
| 822 | ifndef CONFIG_FUNCTION_TRACER |
| 823 | KBUILD_CFLAGS += -fomit-frame-pointer |
| 824 | endif |
| 825 | endif |
| 826 | |
| 827 | # Initialize all stack variables with a 0xAA pattern. |
| 828 | ifdef CONFIG_INIT_STACK_ALL_PATTERN |
| 829 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern |
| 830 | endif |
| 831 | |
| 832 | # Initialize all stack variables with a zero value. |
| 833 | ifdef CONFIG_INIT_STACK_ALL_ZERO |
| 834 | # Future support for zero initialization is still being debated, see |
| 835 | # https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being |
| 836 | # renamed or dropped. |
| 837 | KBUILD_CFLAGS += -ftrivial-auto-var-init=zero |
| 838 | KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang |
| 839 | endif |
| 840 | |
| 841 | # While VLAs have been removed, GCC produces unreachable stack probes |
| 842 | # for the randomize_kstack_offset feature. Disable it for all compilers. |
| 843 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) |
| 844 | |
| 845 | # Clear used registers at func exit (to reduce data lifetime and ROP gadgets). |
| 846 | ifdef CONFIG_ZERO_CALL_USED_REGS |
| 847 | KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr |
| 848 | endif |
| 849 | |
| 850 | DEBUG_CFLAGS := |
| 851 | |
| 852 | ifdef CONFIG_DEBUG_INFO |
| 853 | |
| 854 | ifdef CONFIG_DEBUG_INFO_SPLIT |
| 855 | DEBUG_CFLAGS += -gsplit-dwarf |
| 856 | else |
| 857 | DEBUG_CFLAGS += -g |
| 858 | endif |
| 859 | |
| 860 | ifndef CONFIG_AS_IS_LLVM |
| 861 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
| 862 | endif |
| 863 | |
| 864 | ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT |
| 865 | dwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4 |
| 866 | dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5 |
| 867 | DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y) |
| 868 | endif |
| 869 | |
| 870 | ifdef CONFIG_DEBUG_INFO_REDUCED |
| 871 | DEBUG_CFLAGS += -fno-var-tracking |
| 872 | ifdef CONFIG_CC_IS_GCC |
| 873 | DEBUG_CFLAGS += -femit-struct-debug-baseonly |
| 874 | endif |
| 875 | endif |
| 876 | |
| 877 | ifdef CONFIG_DEBUG_INFO_COMPRESSED |
| 878 | DEBUG_CFLAGS += -gz=zlib |
| 879 | KBUILD_AFLAGS += -gz=zlib |
| 880 | KBUILD_LDFLAGS += --compress-debug-sections=zlib |
| 881 | endif |
| 882 | |
| 883 | endif # CONFIG_DEBUG_INFO |
| 884 | |
| 885 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
| 886 | export DEBUG_CFLAGS |
| 887 | |
| 888 | ifdef CONFIG_FUNCTION_TRACER |
| 889 | ifdef CONFIG_FTRACE_MCOUNT_USE_CC |
| 890 | CC_FLAGS_FTRACE += -mrecord-mcount |
| 891 | ifdef CONFIG_HAVE_NOP_MCOUNT |
| 892 | ifeq ($(call cc-option-yn, -mnop-mcount),y) |
| 893 | CC_FLAGS_FTRACE += -mnop-mcount |
| 894 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT |
| 895 | endif |
| 896 | endif |
| 897 | endif |
| 898 | ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL |
| 899 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT |
| 900 | endif |
| 901 | ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
| 902 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
| 903 | BUILD_C_RECORDMCOUNT := y |
| 904 | export BUILD_C_RECORDMCOUNT |
| 905 | endif |
| 906 | endif |
| 907 | ifdef CONFIG_HAVE_FENTRY |
| 908 | # s390-linux-gnu-gcc did not support -mfentry until gcc-9. |
| 909 | ifeq ($(call cc-option-yn, -mfentry),y) |
| 910 | CC_FLAGS_FTRACE += -mfentry |
| 911 | CC_FLAGS_USING += -DCC_USING_FENTRY |
| 912 | endif |
| 913 | endif |
| 914 | export CC_FLAGS_FTRACE |
| 915 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) |
| 916 | KBUILD_AFLAGS += $(CC_FLAGS_USING) |
| 917 | endif |
| 918 | |
| 919 | # We trigger additional mismatches with less inlining |
| 920 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
| 921 | KBUILD_CFLAGS += -fno-inline-functions-called-once |
| 922 | endif |
| 923 | |
| 924 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
| 925 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
| 926 | LDFLAGS_vmlinux += --gc-sections |
| 927 | endif |
| 928 | |
| 929 | ifdef CONFIG_SHADOW_CALL_STACK |
| 930 | CC_FLAGS_SCS := -fsanitize=shadow-call-stack |
| 931 | KBUILD_CFLAGS += $(CC_FLAGS_SCS) |
| 932 | export CC_FLAGS_SCS |
| 933 | endif |
| 934 | |
| 935 | ifdef CONFIG_LTO_CLANG |
| 936 | ifdef CONFIG_LTO_CLANG_THIN |
| 937 | CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit |
| 938 | KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache |
| 939 | else |
| 940 | CC_FLAGS_LTO := -flto |
| 941 | endif |
| 942 | CC_FLAGS_LTO += -fvisibility=hidden |
| 943 | |
| 944 | # Limit inlining across translation units to reduce binary size |
| 945 | KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 |
| 946 | |
| 947 | # Check for frame size exceeding threshold during prolog/epilog insertion |
| 948 | # when using lld < 13.0.0. |
| 949 | ifneq ($(CONFIG_FRAME_WARN),0) |
| 950 | ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0) |
| 951 | KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) |
| 952 | endif |
| 953 | endif |
| 954 | endif |
| 955 | |
| 956 | ifdef CONFIG_LTO |
| 957 | KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) |
| 958 | KBUILD_AFLAGS += -fno-lto |
| 959 | export CC_FLAGS_LTO |
| 960 | endif |
| 961 | |
| 962 | ifdef CONFIG_CFI_CLANG |
| 963 | CC_FLAGS_CFI := -fsanitize=cfi \ |
| 964 | -fsanitize-cfi-cross-dso \ |
| 965 | -fno-sanitize-cfi-canonical-jump-tables \ |
| 966 | -fno-sanitize-trap=cfi \ |
| 967 | -fno-sanitize-blacklist |
| 968 | |
| 969 | ifdef CONFIG_CFI_PERMISSIVE |
| 970 | CC_FLAGS_CFI += -fsanitize-recover=cfi |
| 971 | endif |
| 972 | |
| 973 | # If LTO flags are filtered out, we must also filter out CFI. |
| 974 | CC_FLAGS_LTO += $(CC_FLAGS_CFI) |
| 975 | KBUILD_CFLAGS += $(CC_FLAGS_CFI) |
| 976 | export CC_FLAGS_CFI |
| 977 | endif |
| 978 | |
| 979 | ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B |
| 980 | KBUILD_CFLAGS += -falign-functions=64 |
| 981 | endif |
| 982 | |
| 983 | # arch Makefile may override CC so keep this after arch Makefile is included |
| 984 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
| 985 | |
| 986 | # warn about C99 declaration after statement |
| 987 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
| 988 | |
| 989 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
| 990 | KBUILD_CFLAGS += -Wvla |
| 991 | |
| 992 | # disable pointer signed / unsigned warnings in gcc 4.0 |
| 993 | KBUILD_CFLAGS += -Wno-pointer-sign |
| 994 | |
| 995 | # disable stringop warnings in gcc 8+ |
| 996 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) |
| 997 | |
| 998 | # We'll want to enable this eventually, but it's not going away for 5.7 at least |
| 999 | KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) |
| 1000 | KBUILD_CFLAGS += -Wno-array-bounds |
| 1001 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) |
| 1002 | |
| 1003 | # Another good warning that we'll want to enable eventually |
| 1004 | KBUILD_CFLAGS += $(call cc-disable-warning, restrict) |
| 1005 | |
| 1006 | # Enabled with W=2, disabled by default as noisy |
| 1007 | ifdef CONFIG_CC_IS_GCC |
| 1008 | KBUILD_CFLAGS += -Wno-maybe-uninitialized |
| 1009 | endif |
| 1010 | |
| 1011 | # disable invalid "can't wrap" optimizations for signed / pointers |
| 1012 | KBUILD_CFLAGS += -fno-strict-overflow |
| 1013 | |
| 1014 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
| 1015 | KBUILD_CFLAGS += -fno-stack-check |
| 1016 | |
| 1017 | # conserve stack if available |
| 1018 | ifdef CONFIG_CC_IS_GCC |
| 1019 | KBUILD_CFLAGS += -fconserve-stack |
| 1020 | endif |
| 1021 | |
| 1022 | # Prohibit date/time macros, which would make the build non-deterministic |
| 1023 | KBUILD_CFLAGS += -Werror=date-time |
| 1024 | |
| 1025 | # enforce correct pointer usage |
| 1026 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) |
| 1027 | |
| 1028 | # Require designated initializers for all marked structures |
| 1029 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) |
| 1030 | |
| 1031 | # change __FILE__ to the relative path from the srctree |
| 1032 | KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
| 1033 | |
| 1034 | # include additional Makefiles when needed |
| 1035 | include-y := scripts/Makefile.extrawarn |
| 1036 | include-$(CONFIG_KASAN) += scripts/Makefile.kasan |
| 1037 | include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan |
| 1038 | include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan |
| 1039 | include-$(CONFIG_KCOV) += scripts/Makefile.kcov |
| 1040 | include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins |
| 1041 | |
| 1042 | include $(addprefix $(srctree)/, $(include-y)) |
| 1043 | |
| 1044 | # scripts/Makefile.gcc-plugins is intentionally included last. |
| 1045 | # Do not add $(call cc-option,...) below this line. When you build the kernel |
| 1046 | # from the clean source tree, the GCC plugins do not exist at this point. |
| 1047 | |
| 1048 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments |
| 1049 | KBUILD_CPPFLAGS += $(KCPPFLAGS) |
| 1050 | KBUILD_AFLAGS += $(KAFLAGS) |
| 1051 | KBUILD_CFLAGS += $(KCFLAGS) |
| 1052 | |
| 1053 | KBUILD_LDFLAGS_MODULE += --build-id=sha1 |
| 1054 | LDFLAGS_vmlinux += --build-id=sha1 |
| 1055 | |
| 1056 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
| 1057 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
| 1058 | endif |
| 1059 | |
| 1060 | ifeq ($(CONFIG_RELR),y) |
| 1061 | LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags |
| 1062 | endif |
| 1063 | |
| 1064 | # We never want expected sections to be placed heuristically by the |
| 1065 | # linker. All sections should be explicitly named in the linker script. |
| 1066 | ifdef CONFIG_LD_ORPHAN_WARN |
| 1067 | LDFLAGS_vmlinux += --orphan-handling=warn |
| 1068 | endif |
| 1069 | |
| 1070 | # Align the bit size of userspace programs with the kernel |
| 1071 | KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) |
| 1072 | KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) |
| 1073 | |
| 1074 | # make the checker run with the right architecture |
| 1075 | CHECKFLAGS += --arch=$(ARCH) |
| 1076 | |
| 1077 | # insure the checker run with the right endianness |
| 1078 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) |
| 1079 | |
| 1080 | # the checker needs the correct machine size |
| 1081 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) |
| 1082 | |
| 1083 | # Default kernel image to build when no specific target is given. |
| 1084 | # KBUILD_IMAGE may be overruled on the command line or |
| 1085 | # set in the environment |
| 1086 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
| 1087 | # this default value |
| 1088 | export KBUILD_IMAGE ?= vmlinux |
| 1089 | |
| 1090 | # |
| 1091 | # INSTALL_PATH specifies where to place the updated kernel and system map |
| 1092 | # images. Default is /boot, but you can set it to other values |
| 1093 | export INSTALL_PATH ?= /boot |
| 1094 | |
| 1095 | # |
| 1096 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. |
| 1097 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as |
| 1098 | # an argument if needed. Otherwise it defaults to the kernel install path |
| 1099 | # |
| 1100 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) |
| 1101 | |
| 1102 | # |
| 1103 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
| 1104 | # relocations required by build roots. This is not defined in the |
| 1105 | # makefile but the argument can be passed to make if needed. |
| 1106 | # |
| 1107 | |
| 1108 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
| 1109 | export MODLIB |
| 1110 | |
| 1111 | PHONY += prepare0 |
| 1112 | |
| 1113 | export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) |
| 1114 | export MODORDER := $(extmod_prefix)modules.order |
| 1115 | export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps |
| 1116 | |
| 1117 | ifeq ($(KBUILD_EXTMOD),) |
| 1118 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
| 1119 | |
| 1120 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, \ |
| 1121 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ |
| 1122 | $(libs-y) $(libs-m))) |
| 1123 | |
| 1124 | vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ |
| 1125 | $(patsubst %/,%,$(filter %/, $(core-) \ |
| 1126 | $(drivers-) $(libs-)))) |
| 1127 | |
| 1128 | subdir-modorder := $(addsuffix modules.order,$(filter %/, \ |
| 1129 | $(core-y) $(core-m) $(libs-y) $(libs-m) \ |
| 1130 | $(drivers-y) $(drivers-m))) |
| 1131 | |
| 1132 | build-dirs := $(vmlinux-dirs) |
| 1133 | clean-dirs := $(vmlinux-alldirs) |
| 1134 | |
| 1135 | # Externally visible symbols (used by link-vmlinux.sh) |
| 1136 | KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) |
| 1137 | KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) |
| 1138 | ifdef CONFIG_MODULES |
| 1139 | KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) |
| 1140 | KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) |
| 1141 | else |
| 1142 | KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) |
| 1143 | endif |
| 1144 | KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) |
| 1145 | |
| 1146 | export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS |
| 1147 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
| 1148 | # used by scripts/Makefile.package |
| 1149 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) |
| 1150 | |
| 1151 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) |
| 1152 | |
| 1153 | # Recurse until adjust_autoksyms.sh is satisfied |
| 1154 | PHONY += autoksyms_recursive |
| 1155 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
| 1156 | # For the kernel to actually contain only the needed exported symbols, |
| 1157 | # we have to build modules as well to determine what those symbols are. |
| 1158 | # (this can be evaluated only once include/config/auto.conf has been included) |
| 1159 | KBUILD_MODULES := 1 |
| 1160 | |
| 1161 | autoksyms_recursive: descend modules.order |
| 1162 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
| 1163 | "$(MAKE) -f $(srctree)/Makefile vmlinux" |
| 1164 | endif |
| 1165 | |
| 1166 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
| 1167 | |
| 1168 | quiet_cmd_autoksyms_h = GEN $@ |
| 1169 | cmd_autoksyms_h = mkdir -p $(dir $@); \ |
| 1170 | $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ |
| 1171 | |
| 1172 | $(autoksyms_h): |
| 1173 | $(call cmd,autoksyms_h) |
| 1174 | |
| 1175 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
| 1176 | |
| 1177 | # Final link of vmlinux with optional arch pass after final link |
| 1178 | cmd_link-vmlinux = \ |
| 1179 | $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ |
| 1180 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
| 1181 | |
| 1182 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
| 1183 | +$(call if_changed_dep,link-vmlinux) |
| 1184 | |
| 1185 | targets := vmlinux |
| 1186 | |
| 1187 | # The actual objects are generated when descending, |
| 1188 | # make sure no implicit rule kicks in |
| 1189 | $(sort $(vmlinux-deps) $(subdir-modorder)): descend ; |
| 1190 | |
| 1191 | filechk_kernel.release = \ |
| 1192 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
| 1193 | |
| 1194 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
| 1195 | include/config/kernel.release: FORCE |
| 1196 | $(call filechk,kernel.release) |
| 1197 | |
| 1198 | # Additional helpers built in scripts/ |
| 1199 | # Carefully list dependencies so we do not try to build scripts twice |
| 1200 | # in parallel |
| 1201 | PHONY += scripts |
| 1202 | scripts: scripts_basic scripts_dtc |
| 1203 | $(Q)$(MAKE) $(build)=$(@) |
| 1204 | |
| 1205 | # Things we need to do before we recursively start building the kernel |
| 1206 | # or the modules are listed in "prepare". |
| 1207 | # A multi level approach is used. prepareN is processed before prepareN-1. |
| 1208 | # archprepare is used in arch Makefiles and when processed asm symlink, |
| 1209 | # version.h and scripts_basic is processed / created. |
| 1210 | |
| 1211 | PHONY += prepare archprepare |
| 1212 | |
| 1213 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ |
| 1214 | asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ |
| 1215 | include/generated/autoconf.h remove-stale-files |
| 1216 | |
| 1217 | prepare0: archprepare |
| 1218 | $(Q)$(MAKE) $(build)=scripts/mod |
| 1219 | $(Q)$(MAKE) $(build)=. |
| 1220 | |
| 1221 | # All the preparing.. |
| 1222 | prepare: prepare0 |
| 1223 | |
| 1224 | PHONY += remove-stale-files |
| 1225 | remove-stale-files: |
| 1226 | $(Q)$(srctree)/scripts/remove-stale-files |
| 1227 | |
| 1228 | # Support for using generic headers in asm-generic |
| 1229 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
| 1230 | |
| 1231 | PHONY += asm-generic uapi-asm-generic |
| 1232 | asm-generic: uapi-asm-generic |
| 1233 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
| 1234 | generic=include/asm-generic |
| 1235 | uapi-asm-generic: |
| 1236 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
| 1237 | generic=include/uapi/asm-generic |
| 1238 | |
| 1239 | # Generate some files |
| 1240 | # --------------------------------------------------------------------------- |
| 1241 | |
| 1242 | # KERNELRELEASE can change from a few different places, meaning version.h |
| 1243 | # needs to be updated, so this check is forced on all builds |
| 1244 | |
| 1245 | uts_len := 64 |
| 1246 | define filechk_utsrelease.h |
| 1247 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
| 1248 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
| 1249 | exit 1; \ |
| 1250 | fi; \ |
| 1251 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
| 1252 | endef |
| 1253 | |
| 1254 | define filechk_version.h |
| 1255 | if [ $(SUBLEVEL) -gt 255 ]; then \ |
| 1256 | echo \#define LINUX_VERSION_CODE $(shell \ |
| 1257 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ |
| 1258 | else \ |
| 1259 | echo \#define LINUX_VERSION_CODE $(shell \ |
| 1260 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ |
| 1261 | fi; \ |
| 1262 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ |
| 1263 | ((c) > 255 ? 255 : (c)))'; \ |
| 1264 | echo \#define LINUX_VERSION_MAJOR $(VERSION); \ |
| 1265 | echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ |
| 1266 | echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) |
| 1267 | endef |
| 1268 | |
| 1269 | $(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0) |
| 1270 | $(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0) |
| 1271 | $(version_h): FORCE |
| 1272 | $(call filechk,version.h) |
| 1273 | |
| 1274 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
| 1275 | $(call filechk,utsrelease.h) |
| 1276 | |
| 1277 | PHONY += headerdep |
| 1278 | headerdep: |
| 1279 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
| 1280 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include |
| 1281 | |
| 1282 | # --------------------------------------------------------------------------- |
| 1283 | # Kernel headers |
| 1284 | |
| 1285 | #Default location for installed headers |
| 1286 | export INSTALL_HDR_PATH = $(objtree)/usr |
| 1287 | |
| 1288 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include |
| 1289 | cmd_headers_install = \ |
| 1290 | mkdir -p $(INSTALL_HDR_PATH); \ |
| 1291 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ |
| 1292 | usr/include $(INSTALL_HDR_PATH) |
| 1293 | |
| 1294 | PHONY += headers_install |
| 1295 | headers_install: headers |
| 1296 | $(call cmd,headers_install) |
| 1297 | |
| 1298 | PHONY += archheaders archscripts |
| 1299 | |
| 1300 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
| 1301 | |
| 1302 | PHONY += headers |
| 1303 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts |
| 1304 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
| 1305 | $(error Headers not exportable for the $(SRCARCH) architecture)) |
| 1306 | $(Q)$(MAKE) $(hdr-inst)=include/uapi |
| 1307 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi |
| 1308 | |
| 1309 | # Deprecated. It is no-op now. |
| 1310 | PHONY += headers_check |
| 1311 | headers_check: |
| 1312 | @echo >&2 "=================== WARNING ===================" |
| 1313 | @echo >&2 "Since Linux 5.5, 'make headers_check' is no-op," |
| 1314 | @echo >&2 "and will be removed after Linux 5.15 release." |
| 1315 | @echo >&2 "Please remove headers_check from your scripts." |
| 1316 | @echo >&2 "===============================================" |
| 1317 | |
| 1318 | ifdef CONFIG_HEADERS_INSTALL |
| 1319 | prepare: headers |
| 1320 | endif |
| 1321 | |
| 1322 | PHONY += scripts_unifdef |
| 1323 | scripts_unifdef: scripts_basic |
| 1324 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef |
| 1325 | |
| 1326 | # --------------------------------------------------------------------------- |
| 1327 | # Install |
| 1328 | |
| 1329 | # Many distributions have the custom install script, /sbin/installkernel. |
| 1330 | # If DKMS is installed, 'make install' will eventually recuses back |
| 1331 | # to the this Makefile to build and install external modules. |
| 1332 | # Cancel sub_make_done so that options such as M=, V=, etc. are parsed. |
| 1333 | |
| 1334 | install: sub_make_done := |
| 1335 | |
| 1336 | # --------------------------------------------------------------------------- |
| 1337 | # Tools |
| 1338 | |
| 1339 | ifdef CONFIG_STACK_VALIDATION |
| 1340 | prepare: tools/objtool |
| 1341 | endif |
| 1342 | |
| 1343 | ifdef CONFIG_BPF |
| 1344 | ifdef CONFIG_DEBUG_INFO_BTF |
| 1345 | prepare: tools/bpf/resolve_btfids |
| 1346 | endif |
| 1347 | endif |
| 1348 | |
| 1349 | PHONY += resolve_btfids_clean |
| 1350 | |
| 1351 | resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids |
| 1352 | |
| 1353 | # tools/bpf/resolve_btfids directory might not exist |
| 1354 | # in output directory, skip its clean in that case |
| 1355 | resolve_btfids_clean: |
| 1356 | ifneq ($(wildcard $(resolve_btfids_O)),) |
| 1357 | $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean |
| 1358 | endif |
| 1359 | |
| 1360 | # Clear a bunch of variables before executing the submake |
| 1361 | ifeq ($(quiet),silent_) |
| 1362 | tools_silent=s |
| 1363 | endif |
| 1364 | |
| 1365 | tools/: FORCE |
| 1366 | $(Q)mkdir -p $(objtree)/tools |
| 1367 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ |
| 1368 | |
| 1369 | tools/%: FORCE |
| 1370 | $(Q)mkdir -p $(objtree)/tools |
| 1371 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* |
| 1372 | |
| 1373 | # --------------------------------------------------------------------------- |
| 1374 | # Kernel selftest |
| 1375 | |
| 1376 | PHONY += kselftest |
| 1377 | kselftest: |
| 1378 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
| 1379 | |
| 1380 | kselftest-%: FORCE |
| 1381 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* |
| 1382 | |
| 1383 | PHONY += kselftest-merge |
| 1384 | kselftest-merge: |
| 1385 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) |
| 1386 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ |
| 1387 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config |
| 1388 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
| 1389 | |
| 1390 | # --------------------------------------------------------------------------- |
| 1391 | # Devicetree files |
| 1392 | |
| 1393 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) |
| 1394 | dtstree := arch/$(SRCARCH)/boot/dts |
| 1395 | endif |
| 1396 | |
| 1397 | ifneq ($(dtstree),) |
| 1398 | |
| 1399 | %.dtb: include/config/kernel.release scripts_dtc |
| 1400 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
| 1401 | |
| 1402 | %.dtbo: include/config/kernel.release scripts_dtc |
| 1403 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
| 1404 | |
| 1405 | PHONY += dtbs dtbs_install dtbs_check |
| 1406 | dtbs: include/config/kernel.release scripts_dtc |
| 1407 | $(Q)$(MAKE) $(build)=$(dtstree) |
| 1408 | |
| 1409 | ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) |
| 1410 | export CHECK_DTBS=y |
| 1411 | dtbs: dt_binding_check |
| 1412 | endif |
| 1413 | |
| 1414 | dtbs_check: dtbs |
| 1415 | |
| 1416 | dtbs_install: |
| 1417 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) |
| 1418 | |
| 1419 | ifdef CONFIG_OF_EARLY_FLATTREE |
| 1420 | all: dtbs |
| 1421 | endif |
| 1422 | |
| 1423 | endif |
| 1424 | |
| 1425 | PHONY += scripts_dtc |
| 1426 | scripts_dtc: scripts_basic |
| 1427 | $(Q)$(MAKE) $(build)=scripts/dtc |
| 1428 | |
| 1429 | ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) |
| 1430 | export CHECK_DT_BINDING=y |
| 1431 | endif |
| 1432 | |
| 1433 | PHONY += dt_binding_check |
| 1434 | dt_binding_check: scripts_dtc |
| 1435 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings |
| 1436 | |
| 1437 | # --------------------------------------------------------------------------- |
| 1438 | # Modules |
| 1439 | |
| 1440 | ifdef CONFIG_MODULES |
| 1441 | |
| 1442 | # By default, build modules as well |
| 1443 | |
| 1444 | all: modules |
| 1445 | |
| 1446 | # When we're building modules with modversions, we need to consider |
| 1447 | # the built-in objects during the descend as well, in order to |
| 1448 | # make sure the checksums are up to date before we record them. |
| 1449 | ifdef CONFIG_MODVERSIONS |
| 1450 | KBUILD_BUILTIN := 1 |
| 1451 | endif |
| 1452 | |
| 1453 | # Build modules |
| 1454 | # |
| 1455 | # A module can be listed more than once in obj-m resulting in |
| 1456 | # duplicate lines in modules.order files. Those are removed |
| 1457 | # using awk while concatenating to the final file. |
| 1458 | |
| 1459 | PHONY += modules |
| 1460 | modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare |
| 1461 | |
| 1462 | cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ |
| 1463 | |
| 1464 | modules.order: $(subdir-modorder) FORCE |
| 1465 | $(call if_changed,modules_order) |
| 1466 | |
| 1467 | targets += modules.order |
| 1468 | |
| 1469 | # Target to prepare building external modules |
| 1470 | PHONY += modules_prepare |
| 1471 | modules_prepare: prepare |
| 1472 | $(Q)$(MAKE) $(build)=scripts scripts/module.lds |
| 1473 | |
| 1474 | export modules_sign_only := |
| 1475 | |
| 1476 | ifeq ($(CONFIG_MODULE_SIG),y) |
| 1477 | PHONY += modules_sign |
| 1478 | modules_sign: modules_install |
| 1479 | @: |
| 1480 | |
| 1481 | # modules_sign is a subset of modules_install. |
| 1482 | # 'make modules_install modules_sign' is equivalent to 'make modules_install'. |
| 1483 | ifeq ($(filter modules_install,$(MAKECMDGOALS)),) |
| 1484 | modules_sign_only := y |
| 1485 | endif |
| 1486 | endif |
| 1487 | |
| 1488 | modinst_pre := |
| 1489 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) |
| 1490 | modinst_pre := __modinst_pre |
| 1491 | endif |
| 1492 | |
| 1493 | modules_install: $(modinst_pre) |
| 1494 | PHONY += __modinst_pre |
| 1495 | __modinst_pre: |
| 1496 | @rm -rf $(MODLIB)/kernel |
| 1497 | @rm -f $(MODLIB)/source |
| 1498 | @mkdir -p $(MODLIB)/kernel |
| 1499 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
| 1500 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
| 1501 | rm -f $(MODLIB)/build ; \ |
| 1502 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
| 1503 | fi |
| 1504 | @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order |
| 1505 | @cp -f modules.builtin $(MODLIB)/ |
| 1506 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ |
| 1507 | |
| 1508 | endif # CONFIG_MODULES |
| 1509 | |
| 1510 | ### |
| 1511 | # Cleaning is done on three levels. |
| 1512 | # make clean Delete most generated files |
| 1513 | # Leave enough to build external modules |
| 1514 | # make mrproper Delete the current configuration, and all generated files |
| 1515 | # make distclean Remove editor backup files, patch leftover files and the like |
| 1516 | |
| 1517 | # Directories & files removed with 'make clean' |
| 1518 | CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ |
| 1519 | modules.builtin modules.builtin.modinfo modules.nsdeps \ |
| 1520 | compile_commands.json .thinlto-cache |
| 1521 | |
| 1522 | # Directories & files removed with 'make mrproper' |
| 1523 | MRPROPER_FILES += include/config include/generated \ |
| 1524 | arch/$(SRCARCH)/include/generated .tmp_objdiff \ |
| 1525 | debian snap tar-install \ |
| 1526 | .config .config.old .version \ |
| 1527 | Module.symvers \ |
| 1528 | certs/signing_key.pem certs/signing_key.x509 \ |
| 1529 | certs/x509.genkey \ |
| 1530 | vmlinux-gdb.py \ |
| 1531 | *.spec |
| 1532 | |
| 1533 | # clean - Delete most, but leave enough to build external modules |
| 1534 | # |
| 1535 | clean: rm-files := $(CLEAN_FILES) |
| 1536 | |
| 1537 | PHONY += archclean vmlinuxclean |
| 1538 | |
| 1539 | vmlinuxclean: |
| 1540 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean |
| 1541 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
| 1542 | |
| 1543 | clean: archclean vmlinuxclean resolve_btfids_clean |
| 1544 | |
| 1545 | # mrproper - Delete all generated files, including .config |
| 1546 | # |
| 1547 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
| 1548 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
| 1549 | |
| 1550 | PHONY += $(mrproper-dirs) mrproper |
| 1551 | $(mrproper-dirs): |
| 1552 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
| 1553 | |
| 1554 | mrproper: clean $(mrproper-dirs) |
| 1555 | $(call cmd,rmfiles) |
| 1556 | |
| 1557 | # distclean |
| 1558 | # |
| 1559 | PHONY += distclean |
| 1560 | |
| 1561 | distclean: mrproper |
| 1562 | @find . $(RCS_FIND_IGNORE) \ |
| 1563 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
| 1564 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
| 1565 | -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ |
| 1566 | -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ |
| 1567 | -type f -print | xargs rm -f |
| 1568 | |
| 1569 | |
| 1570 | # Packaging of the kernel to various formats |
| 1571 | # --------------------------------------------------------------------------- |
| 1572 | |
| 1573 | %src-pkg: FORCE |
| 1574 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
| 1575 | %pkg: include/config/kernel.release FORCE |
| 1576 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
| 1577 | |
| 1578 | # Brief documentation of the typical targets used |
| 1579 | # --------------------------------------------------------------------------- |
| 1580 | |
| 1581 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
| 1582 | boards := $(sort $(notdir $(boards))) |
| 1583 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
| 1584 | board-dirs := $(sort $(notdir $(board-dirs:/=))) |
| 1585 | |
| 1586 | PHONY += help |
| 1587 | help: |
| 1588 | @echo 'Cleaning targets:' |
| 1589 | @echo ' clean - Remove most generated files but keep the config and' |
| 1590 | @echo ' enough build support to build external modules' |
| 1591 | @echo ' mrproper - Remove all generated files + config + various backup files' |
| 1592 | @echo ' distclean - mrproper + remove editor backup and patch files' |
| 1593 | @echo '' |
| 1594 | @echo 'Configuration targets:' |
| 1595 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help |
| 1596 | @echo '' |
| 1597 | @echo 'Other generic targets:' |
| 1598 | @echo ' all - Build all targets marked with [*]' |
| 1599 | @echo '* vmlinux - Build the bare kernel' |
| 1600 | @echo '* modules - Build all modules' |
| 1601 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
| 1602 | @echo ' dir/ - Build all files in dir and below' |
| 1603 | @echo ' dir/file.[ois] - Build specified target only' |
| 1604 | @echo ' dir/file.ll - Build the LLVM assembly file' |
| 1605 | @echo ' (requires compiler support for LLVM assembly generation)' |
| 1606 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
| 1607 | @echo ' (requires a recent binutils and recent build (System.map))' |
| 1608 | @echo ' dir/file.ko - Build module including final link' |
| 1609 | @echo ' modules_prepare - Set up for building external modules' |
| 1610 | @echo ' tags/TAGS - Generate tags file for editors' |
| 1611 | @echo ' cscope - Generate cscope index' |
| 1612 | @echo ' gtags - Generate GNU GLOBAL index' |
| 1613 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
| 1614 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' |
| 1615 | @echo ' image_name - Output the image name (use with make -s)' |
| 1616 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
| 1617 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
| 1618 | echo '' |
| 1619 | @echo 'Static analysers:' |
| 1620 | @echo ' checkstack - Generate a list of stack hogs' |
| 1621 | @echo ' versioncheck - Sanity check on version.h usage' |
| 1622 | @echo ' includecheck - Check for duplicate included header files' |
| 1623 | @echo ' export_report - List the usages of all exported symbols' |
| 1624 | @echo ' headerdep - Detect inclusion cycles in headers' |
| 1625 | @echo ' coccicheck - Check with Coccinelle' |
| 1626 | @echo ' clang-analyzer - Check with clang static analyzer' |
| 1627 | @echo ' clang-tidy - Check with clang-tidy' |
| 1628 | @echo '' |
| 1629 | @echo 'Tools:' |
| 1630 | @echo ' nsdeps - Generate missing symbol namespace dependencies' |
| 1631 | @echo '' |
| 1632 | @echo 'Kernel selftest:' |
| 1633 | @echo ' kselftest - Build and run kernel selftest' |
| 1634 | @echo ' Build, install, and boot kernel before' |
| 1635 | @echo ' running kselftest on it' |
| 1636 | @echo ' Run as root for full coverage' |
| 1637 | @echo ' kselftest-all - Build kernel selftest' |
| 1638 | @echo ' kselftest-install - Build and install kernel selftest' |
| 1639 | @echo ' kselftest-clean - Remove all generated kselftest files' |
| 1640 | @echo ' kselftest-merge - Merge all the config dependencies of' |
| 1641 | @echo ' kselftest to existing .config.' |
| 1642 | @echo '' |
| 1643 | @$(if $(dtstree), \ |
| 1644 | echo 'Devicetree:'; \ |
| 1645 | echo '* dtbs - Build device tree blobs for enabled boards'; \ |
| 1646 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ |
| 1647 | echo ' dt_binding_check - Validate device tree binding documents'; \ |
| 1648 | echo ' dtbs_check - Validate device tree source files';\ |
| 1649 | echo '') |
| 1650 | |
| 1651 | @echo 'Userspace tools targets:' |
| 1652 | @echo ' use "make tools/help"' |
| 1653 | @echo ' or "cd tools; make help"' |
| 1654 | @echo '' |
| 1655 | @echo 'Kernel packaging:' |
| 1656 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help |
| 1657 | @echo '' |
| 1658 | @echo 'Documentation targets:' |
| 1659 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
| 1660 | @echo '' |
| 1661 | @echo 'Architecture specific targets ($(SRCARCH)):' |
| 1662 | @$(if $(archhelp),$(archhelp),\ |
| 1663 | echo ' No architecture specific help defined for $(SRCARCH)') |
| 1664 | @echo '' |
| 1665 | @$(if $(boards), \ |
| 1666 | $(foreach b, $(boards), \ |
| 1667 | printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
| 1668 | echo '') |
| 1669 | @$(if $(board-dirs), \ |
| 1670 | $(foreach b, $(board-dirs), \ |
| 1671 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ |
| 1672 | printf " %-16s - Show all of the above\\n" help-boards; \ |
| 1673 | echo '') |
| 1674 | |
| 1675 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' |
| 1676 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
| 1677 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
| 1678 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' |
| 1679 | @echo ' (sparse by default)' |
| 1680 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
| 1681 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
| 1682 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' |
| 1683 | @echo ' 1: warnings which may be relevant and do not occur too often' |
| 1684 | @echo ' 2: warnings which occur quite often but may still be relevant' |
| 1685 | @echo ' 3: more obscure warnings, can most likely be ignored' |
| 1686 | @echo ' Multiple levels can be combined with W=12 or W=123' |
| 1687 | @echo '' |
| 1688 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' |
| 1689 | @echo 'For further info see the ./README file' |
| 1690 | |
| 1691 | |
| 1692 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
| 1693 | |
| 1694 | help-boards: $(help-board-dirs) |
| 1695 | |
| 1696 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
| 1697 | |
| 1698 | $(help-board-dirs): help-%: |
| 1699 | @echo 'Architecture specific targets ($(SRCARCH) $*):' |
| 1700 | @$(if $(boards-per-dir), \ |
| 1701 | $(foreach b, $(boards-per-dir), \ |
| 1702 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ |
| 1703 | echo '') |
| 1704 | |
| 1705 | |
| 1706 | # Documentation targets |
| 1707 | # --------------------------------------------------------------------------- |
| 1708 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
| 1709 | linkcheckdocs dochelp refcheckdocs |
| 1710 | PHONY += $(DOC_TARGETS) |
| 1711 | $(DOC_TARGETS): |
| 1712 | $(Q)$(MAKE) $(build)=Documentation $@ |
| 1713 | |
| 1714 | # Misc |
| 1715 | # --------------------------------------------------------------------------- |
| 1716 | |
| 1717 | PHONY += scripts_gdb |
| 1718 | scripts_gdb: prepare0 |
| 1719 | $(Q)$(MAKE) $(build)=scripts/gdb |
| 1720 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
| 1721 | |
| 1722 | ifdef CONFIG_GDB_SCRIPTS |
| 1723 | all: scripts_gdb |
| 1724 | endif |
| 1725 | |
| 1726 | else # KBUILD_EXTMOD |
| 1727 | |
| 1728 | ### |
| 1729 | # External module support. |
| 1730 | # When building external modules the kernel used as basis is considered |
| 1731 | # read-only, and no consistency checks are made and the make |
| 1732 | # system is not used on the basis kernel. If updates are required |
| 1733 | # in the basis kernel ordinary make commands (without M=...) must be used. |
| 1734 | |
| 1735 | # We are always building only modules. |
| 1736 | KBUILD_BUILTIN := |
| 1737 | KBUILD_MODULES := 1 |
| 1738 | |
| 1739 | build-dirs := $(KBUILD_EXTMOD) |
| 1740 | $(MODORDER): descend |
| 1741 | @: |
| 1742 | |
| 1743 | compile_commands.json: $(extmod_prefix)compile_commands.json |
| 1744 | PHONY += compile_commands.json |
| 1745 | |
| 1746 | clean-dirs := $(KBUILD_EXTMOD) |
| 1747 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ |
| 1748 | $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache |
| 1749 | |
| 1750 | PHONY += prepare |
| 1751 | # now expand this into a simple variable to reduce the cost of shell evaluations |
| 1752 | prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) |
| 1753 | prepare: |
| 1754 | @if [ "$(CC_VERSION_TEXT)" != $(CONFIG_CC_VERSION_TEXT) ]; then \ |
| 1755 | echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ |
| 1756 | echo >&2 " The kernel was built by: "$(CONFIG_CC_VERSION_TEXT); \ |
| 1757 | echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ |
| 1758 | fi |
| 1759 | |
| 1760 | PHONY += help |
| 1761 | help: |
| 1762 | @echo ' Building external modules.' |
| 1763 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' |
| 1764 | @echo '' |
| 1765 | @echo ' modules - default target, build the module(s)' |
| 1766 | @echo ' modules_install - install the module' |
| 1767 | @echo ' clean - remove generated files in module directory only' |
| 1768 | @echo '' |
| 1769 | |
| 1770 | # no-op for external module builds |
| 1771 | PHONY += modules_prepare |
| 1772 | |
| 1773 | endif # KBUILD_EXTMOD |
| 1774 | |
| 1775 | # --------------------------------------------------------------------------- |
| 1776 | # Modules |
| 1777 | |
| 1778 | PHONY += modules modules_install |
| 1779 | |
| 1780 | ifdef CONFIG_MODULES |
| 1781 | |
| 1782 | modules: modules_check |
| 1783 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| 1784 | |
| 1785 | PHONY += modules_check |
| 1786 | modules_check: $(MODORDER) |
| 1787 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< |
| 1788 | |
| 1789 | quiet_cmd_depmod = DEPMOD $(MODLIB) |
| 1790 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
| 1791 | $(KERNELRELEASE) |
| 1792 | |
| 1793 | modules_install: |
| 1794 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| 1795 | $(call cmd,depmod) |
| 1796 | |
| 1797 | else # CONFIG_MODULES |
| 1798 | |
| 1799 | # Modules not configured |
| 1800 | # --------------------------------------------------------------------------- |
| 1801 | |
| 1802 | modules modules_install: |
| 1803 | @echo >&2 '***' |
| 1804 | @echo >&2 '*** The present kernel configuration has modules disabled.' |
| 1805 | @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' |
| 1806 | @echo >&2 '*** to enable CONFIG_MODULES.' |
| 1807 | @echo >&2 '***' |
| 1808 | @exit 1 |
| 1809 | |
| 1810 | endif # CONFIG_MODULES |
| 1811 | |
| 1812 | # Single targets |
| 1813 | # --------------------------------------------------------------------------- |
| 1814 | # To build individual files in subdirectories, you can do like this: |
| 1815 | # |
| 1816 | # make foo/bar/baz.s |
| 1817 | # |
| 1818 | # The supported suffixes for single-target are listed in 'single-targets' |
| 1819 | # |
| 1820 | # To build only under specific subdirectories, you can do like this: |
| 1821 | # |
| 1822 | # make foo/bar/baz/ |
| 1823 | |
| 1824 | ifdef single-build |
| 1825 | |
| 1826 | # .ko is special because modpost is needed |
| 1827 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) |
| 1828 | single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) |
| 1829 | |
| 1830 | $(single-ko): single_modpost |
| 1831 | @: |
| 1832 | $(single-no-ko): descend |
| 1833 | @: |
| 1834 | |
| 1835 | ifeq ($(KBUILD_EXTMOD),) |
| 1836 | # For the single build of in-tree modules, use a temporary file to avoid |
| 1837 | # the situation of modules_install installing an invalid modules.order. |
| 1838 | MODORDER := .modules.tmp |
| 1839 | endif |
| 1840 | |
| 1841 | PHONY += single_modpost |
| 1842 | single_modpost: $(single-no-ko) modules_prepare |
| 1843 | $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER) |
| 1844 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| 1845 | |
| 1846 | KBUILD_MODULES := 1 |
| 1847 | |
| 1848 | export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko)) |
| 1849 | |
| 1850 | # trim unrelated directories |
| 1851 | build-dirs := $(foreach d, $(build-dirs), \ |
| 1852 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) |
| 1853 | |
| 1854 | endif |
| 1855 | |
| 1856 | ifndef CONFIG_MODULES |
| 1857 | KBUILD_MODULES := |
| 1858 | endif |
| 1859 | |
| 1860 | # Handle descending into subdirectories listed in $(build-dirs) |
| 1861 | # Preset locale variables to speed up the build process. Limit locale |
| 1862 | # tweaks to this spot to avoid wrong language settings when running |
| 1863 | # make menuconfig etc. |
| 1864 | # Error messages still appears in the original language |
| 1865 | PHONY += descend $(build-dirs) |
| 1866 | descend: $(build-dirs) |
| 1867 | $(build-dirs): prepare |
| 1868 | $(Q)$(MAKE) $(build)=$@ \ |
| 1869 | single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ |
| 1870 | need-builtin=1 need-modorder=1 |
| 1871 | |
| 1872 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) |
| 1873 | PHONY += $(clean-dirs) clean |
| 1874 | $(clean-dirs): |
| 1875 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| 1876 | |
| 1877 | clean: $(clean-dirs) |
| 1878 | $(call cmd,rmfiles) |
| 1879 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
| 1880 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
| 1881 | -o -name '*.ko.*' \ |
| 1882 | -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ |
| 1883 | -o -name '*.dwo' -o -name '*.lst' \ |
| 1884 | -o -name '*.su' -o -name '*.mod' \ |
| 1885 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
| 1886 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
| 1887 | -o -name '*.asn1.[ch]' \ |
| 1888 | -o -name '*.symtypes' -o -name 'modules.order' \ |
| 1889 | -o -name '.tmp_*.o.*' \ |
| 1890 | -o -name '*.c.[012]*.*' \ |
| 1891 | -o -name '*.ll' \ |
| 1892 | -o -name '*.gcno' \ |
| 1893 | -o -name '*.*.symversions' \) -type f -print | xargs rm -f |
| 1894 | |
| 1895 | # Generate tags for editors |
| 1896 | # --------------------------------------------------------------------------- |
| 1897 | quiet_cmd_tags = GEN $@ |
| 1898 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ |
| 1899 | |
| 1900 | tags TAGS cscope gtags: FORCE |
| 1901 | $(call cmd,tags) |
| 1902 | |
| 1903 | # Script to generate missing namespace dependencies |
| 1904 | # --------------------------------------------------------------------------- |
| 1905 | |
| 1906 | PHONY += nsdeps |
| 1907 | nsdeps: export KBUILD_NSDEPS=1 |
| 1908 | nsdeps: modules |
| 1909 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps |
| 1910 | |
| 1911 | # Clang Tooling |
| 1912 | # --------------------------------------------------------------------------- |
| 1913 | |
| 1914 | quiet_cmd_gen_compile_commands = GEN $@ |
| 1915 | cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) |
| 1916 | |
| 1917 | $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ |
| 1918 | $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ |
| 1919 | $(if $(CONFIG_MODULES), $(MODORDER)) FORCE |
| 1920 | $(call if_changed,gen_compile_commands) |
| 1921 | |
| 1922 | targets += $(extmod_prefix)compile_commands.json |
| 1923 | |
| 1924 | PHONY += clang-tidy clang-analyzer |
| 1925 | |
| 1926 | ifdef CONFIG_CC_IS_CLANG |
| 1927 | quiet_cmd_clang_tools = CHECK $< |
| 1928 | cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< |
| 1929 | |
| 1930 | clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json |
| 1931 | $(call cmd,clang_tools) |
| 1932 | else |
| 1933 | clang-tidy clang-analyzer: |
| 1934 | @echo "$@ requires CC=clang" >&2 |
| 1935 | @false |
| 1936 | endif |
| 1937 | |
| 1938 | # Scripts to check various things for consistency |
| 1939 | # --------------------------------------------------------------------------- |
| 1940 | |
| 1941 | PHONY += includecheck versioncheck coccicheck export_report |
| 1942 | |
| 1943 | includecheck: |
| 1944 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| 1945 | -name '*.[hcS]' -type f -print | sort \ |
| 1946 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
| 1947 | |
| 1948 | versioncheck: |
| 1949 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| 1950 | -name '*.[hcS]' -type f -print | sort \ |
| 1951 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
| 1952 | |
| 1953 | coccicheck: |
| 1954 | $(Q)$(BASH) $(srctree)/scripts/$@ |
| 1955 | |
| 1956 | export_report: |
| 1957 | $(PERL) $(srctree)/scripts/export_report.pl |
| 1958 | |
| 1959 | PHONY += checkstack kernelrelease kernelversion image_name |
| 1960 | |
| 1961 | # UML needs a little special treatment here. It wants to use the host |
| 1962 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone |
| 1963 | # else wants $(ARCH), including people doing cross-builds, which means |
| 1964 | # that $(SUBARCH) doesn't work here. |
| 1965 | ifeq ($(ARCH), um) |
| 1966 | CHECKSTACK_ARCH := $(SUBARCH) |
| 1967 | else |
| 1968 | CHECKSTACK_ARCH := $(ARCH) |
| 1969 | endif |
| 1970 | checkstack: |
| 1971 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ |
| 1972 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
| 1973 | |
| 1974 | kernelrelease: |
| 1975 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
| 1976 | |
| 1977 | kernelversion: |
| 1978 | @echo $(KERNELVERSION) |
| 1979 | |
| 1980 | image_name: |
| 1981 | @echo $(KBUILD_IMAGE) |
| 1982 | |
| 1983 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
| 1984 | cmd_rmfiles = rm -rf $(rm-files) |
| 1985 | |
| 1986 | # read saved command lines for existing targets |
| 1987 | existing-targets := $(wildcard $(sort $(targets))) |
| 1988 | |
| 1989 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
| 1990 | |
| 1991 | endif # config-build |
| 1992 | endif # mixed-build |
| 1993 | endif # need-sub-make |
| 1994 | |
| 1995 | PHONY += FORCE |
| 1996 | FORCE: |
| 1997 | |
| 1998 | # Declare the contents of the PHONY variable as phony. We keep that |
| 1999 | # information in a variable so we can use it in if_changed and friends. |
| 2000 | .PHONY: $(PHONY) |