1 # SPDX-License-Identifier: GPL-2.0 2 VERSION = 6 3 PATCHLEVEL = 6 4 SUBLEVEL = 60 5 EXTRAVERSION = 6 NAME = Pinguïn Aangedreven 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 ifeq ($(filter undefine,$(.FEATURES)),) 15 $(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION)) 16 endif 17 18 $(if $(filter __%, $(MAKECMDGOALS)), \ 19 $(error targets prefixed with '__' are only for internal use)) 20 21 # That's our default target when none is given on the command line 22 PHONY := __all 23 __all: 24 25 # We are using a recursive build, so we need to do a little thinking 26 # to get the ordering right. 27 # 28 # Most importantly: sub-Makefiles should only ever modify files in 29 # their own directory. If in some directory we have a dependency on 30 # a file in another dir (which doesn't happen often, but it's often 31 # unavoidable when linking the built-in.a targets which finally 32 # turn into vmlinux), we will call a sub make in that other dir, and 33 # after that we are sure that everything which is in that other dir 34 # is now up to date. 35 # 36 # The only cases where we need to modify files which have global 37 # effects are thus separated out and done before the recursive 38 # descending is started. They are now explicitly listed as the 39 # prepare rule. 40 41 this-makefile := $(lastword $(MAKEFILE_LIST)) 42 export abs_srctree := $(realpath $(dir $(this-makefile))) 43 export abs_objtree := $(CURDIR) 44 45 ifneq ($(sub_make_done),1) 46 47 # Do not use make's built-in rules and variables 48 # (this increases performance and avoids hard-to-debug behaviour) 49 MAKEFLAGS += -rR 50 51 # Avoid funny character set dependencies 52 unexport LC_ALL 53 LC_COLLATE=C 54 LC_NUMERIC=C 55 export LC_COLLATE LC_NUMERIC 56 57 # Avoid interference with shell env settings 58 unexport GREP_OPTIONS 59 60 # Beautify output 61 # --------------------------------------------------------------------------- 62 # 63 # Most of build commands in Kbuild start with "cmd_". You can optionally define 64 # "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from 65 # that command is printed by default. 66 # 67 # e.g.) 68 # quiet_cmd_depmod = DEPMOD $(MODLIB) 69 # cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE) 70 # 71 # A simple variant is to prefix commands with $(Q) - that's useful 72 # for commands that shall be hidden in non-verbose mode. 73 # 74 # $(Q)$(MAKE) $(build)=scripts/basic 75 # 76 # If KBUILD_VERBOSE contains 1, the whole command is echoed. 77 # If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed. 78 # 79 # To put more focus on warnings, be less verbose as default 80 # Use 'make V=1' to see the full commands 81 82 ifeq ("$(origin V)", "command line") 83 KBUILD_VERBOSE = $(V) 84 endif 85 86 quiet = quiet_ 87 Q = @ 88 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) 90 quiet = 91 Q = 92 endif 93 94 # If the user is running make -s (silent mode), suppress echoing of 95 # commands 96 # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS. 97 98 ifeq ($(filter 3.%,$(MAKE_VERSION)),) 99 short-opts := $(firstword -$(MAKEFLAGS)) 100 else 101 short-opts := $(filter-out --%,$(MAKEFLAGS)) 102 endif 103 104 ifneq ($(findstring s,$(short-opts)),) 105 quiet=silent_ 106 override KBUILD_VERBOSE := 107 endif 108 109 export quiet Q KBUILD_VERBOSE 110 111 # Call a source code checker (by default, "sparse") as part of the 112 # C compilation. 113 # 114 # Use 'make C=1' to enable checking of only re-compiled files. 115 # Use 'make C=2' to enable checking of *all* source files, regardless 116 # of whether they are re-compiled or not. 117 # 118 # See the file "Documentation/dev-tools/sparse.rst" for more details, 119 # including where to get the "sparse" utility. 120 121 ifeq ("$(origin C)", "command line") 122 KBUILD_CHECKSRC = $(C) 123 endif 124 ifndef KBUILD_CHECKSRC 125 KBUILD_CHECKSRC = 0 126 endif 127 128 export KBUILD_CHECKSRC 129 130 # Enable "clippy" (a linter) as part of the Rust compilation. 131 # 132 # Use 'make CLIPPY=1' to enable it. 133 ifeq ("$(origin CLIPPY)", "command line") 134 KBUILD_CLIPPY := $(CLIPPY) 135 endif 136 137 export KBUILD_CLIPPY 138 139 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 140 # directory of external module to build. Setting M= takes precedence. 141 ifeq ("$(origin M)", "command line") 142 KBUILD_EXTMOD := $(M) 143 endif 144 145 $(if $(word 2, $(KBUILD_EXTMOD)), \ 146 $(error building multiple external modules is not supported)) 147 148 $(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ 149 $(error module directory path cannot contain '$x'))) 150 151 # Remove trailing slashes 152 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) 153 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) 154 endif 155 156 export KBUILD_EXTMOD 157 158 # Kbuild will save output files in the current working directory. 159 # This does not need to match to the root of the kernel source tree. 160 # 161 # For example, you can do this: 162 # 163 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 164 # 165 # If you want to save output files in a different location, there are 166 # two syntaxes to specify it. 167 # 168 # 1) O= 169 # Use "make O=dir/to/store/output/files/" 170 # 171 # 2) Set KBUILD_OUTPUT 172 # Set the environment variable KBUILD_OUTPUT to point to the output directory. 173 # export KBUILD_OUTPUT=dir/to/store/output/files/; make 174 # 175 # The O= assignment takes precedence over the KBUILD_OUTPUT environment 176 # variable. 177 178 # Do we want to change the working directory? 179 ifeq ("$(origin O)", "command line") 180 KBUILD_OUTPUT := $(O) 181 endif 182 183 ifneq ($(KBUILD_OUTPUT),) 184 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 185 # expand a shell special character '~'. We use a somewhat tedious way here. 186 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 187 $(if $(abs_objtree),, \ 188 $(error failed to create output directory "$(KBUILD_OUTPUT)")) 189 190 # $(realpath ...) resolves symlinks 191 abs_objtree := $(realpath $(abs_objtree)) 192 endif # ifneq ($(KBUILD_OUTPUT),) 193 194 ifneq ($(words $(subst :, ,$(abs_srctree))), 1) 195 $(error source directory cannot contain spaces or colons) 196 endif 197 198 ifneq ($(filter 3.%,$(MAKE_VERSION)),) 199 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 200 # We need to invoke sub-make to avoid implicit rules in the top Makefile. 201 need-sub-make := 1 202 # Cancel implicit rules for this Makefile. 203 $(this-makefile): ; 204 endif 205 206 export sub_make_done := 1 207 208 endif # sub_make_done 209 210 ifeq ($(abs_objtree),$(CURDIR)) 211 # Suppress "Entering directory ..." if we are at the final work directory. 212 no-print-directory := --no-print-directory 213 else 214 # Recursion to show "Entering directory ..." 215 need-sub-make := 1 216 endif 217 218 ifeq ($(filter --no-print-directory, $(MAKEFLAGS)),) 219 # If --no-print-directory is unset, recurse once again to set it. 220 # You may end up recursing into __sub-make twice. This is needed due to the 221 # behavior change in GNU Make 4.4.1. 222 need-sub-make := 1 223 endif 224 225 ifeq ($(need-sub-make),1) 226 227 PHONY += $(MAKECMDGOALS) __sub-make 228 229 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 230 @: 231 232 # Invoke a second make in the output directory, passing relevant variables 233 __sub-make: 234 $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \ 235 -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 236 237 else # need-sub-make 238 239 # We process the rest of the Makefile if this is the final invocation of make 240 241 ifeq ($(abs_srctree),$(abs_objtree)) 242 # building in the source tree 243 srctree := . 244 building_out_of_srctree := 245 else 246 ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 247 # building in a subdirectory of the source tree 248 srctree := .. 249 else 250 srctree := $(abs_srctree) 251 endif 252 building_out_of_srctree := 1 253 endif 254 255 ifneq ($(KBUILD_ABS_SRCTREE),) 256 srctree := $(abs_srctree) 257 endif 258 259 objtree := . 260 VPATH := $(srctree) 261 262 export building_out_of_srctree srctree objtree VPATH 263 264 # To make sure we do not include .config for any of the *config targets 265 # catch them early, and hand them over to scripts/kconfig/Makefile 266 # It is allowed to specify more targets when calling make, including 267 # mixing *config targets and build targets. 268 # For example 'make oldconfig all'. 269 # Detect when mixed targets is specified, and make a second invocation 270 # of make so .config is not included in this case either (for *config). 271 272 version_h := include/generated/uapi/linux/version.h 273 274 clean-targets := %clean mrproper cleandocs 275 no-dot-config-targets := $(clean-targets) \ 276 cscope gtags TAGS tags help% %docs check% coccicheck \ 277 $(version_h) headers headers_% archheaders archscripts \ 278 %asm-generic kernelversion %src-pkg dt_binding_check \ 279 outputmakefile rustavailable rustfmt rustfmtcheck 280 # Installation targets should not require compiler. Unfortunately, vdso_install 281 # is an exception where build artifacts may be updated. This must be fixed. 282 no-compiler-targets := $(no-dot-config-targets) install dtbs_install \ 283 headers_install modules_install modules_sign kernelrelease image_name 284 no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \ 285 image_name 286 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/ 287 288 config-build := 289 mixed-build := 290 need-config := 1 291 need-compiler := 1 292 may-sync-config := 1 293 single-build := 294 295 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 296 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 297 need-config := 298 endif 299 endif 300 301 ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) 302 ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) 303 need-compiler := 304 endif 305 endif 306 307 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 308 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 309 may-sync-config := 310 endif 311 endif 312 313 ifneq ($(KBUILD_EXTMOD),) 314 may-sync-config := 315 endif 316 317 ifeq ($(KBUILD_EXTMOD),) 318 ifneq ($(filter %config,$(MAKECMDGOALS)),) 319 config-build := 1 320 ifneq ($(words $(MAKECMDGOALS)),1) 321 mixed-build := 1 322 endif 323 endif 324 endif 325 326 # We cannot build single targets and the others at the same time 327 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 328 single-build := 1 329 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 330 mixed-build := 1 331 endif 332 endif 333 334 # For "make -j clean all", "make -j mrproper defconfig all", etc. 335 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 336 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 337 mixed-build := 1 338 endif 339 endif 340 341 # install and modules_install need also be processed one by one 342 ifneq ($(filter install,$(MAKECMDGOALS)),) 343 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 344 mixed-build := 1 345 endif 346 endif 347 348 ifdef mixed-build 349 # =========================================================================== 350 # We're called with mixed targets (*config and build targets). 351 # Handle them one by one. 352 353 PHONY += $(MAKECMDGOALS) __build_one_by_one 354 355 $(MAKECMDGOALS): __build_one_by_one 356 @: 357 358 __build_one_by_one: 359 $(Q)set -e; \ 360 for i in $(MAKECMDGOALS); do \ 361 $(MAKE) -f $(srctree)/Makefile $$i; \ 362 done 363 364 else # !mixed-build 365 366 include $(srctree)/scripts/Kbuild.include 367 368 # Read KERNELRELEASE from include/config/kernel.release (if it exists) 369 KERNELRELEASE = $(call read-file, include/config/kernel.release) 370 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 371 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 372 373 include $(srctree)/scripts/subarch.include 374 375 # Cross compiling and selecting different set of gcc/bin-utils 376 # --------------------------------------------------------------------------- 377 # 378 # When performing cross compilation for other architectures ARCH shall be set 379 # to the target architecture. (See arch/* for the possibilities). 380 # ARCH can be set during invocation of make: 381 # make ARCH=ia64 382 # Another way is to have ARCH set in the environment. 383 # The default ARCH is the host where make is executed. 384 385 # CROSS_COMPILE specify the prefix used for all executables used 386 # during compilation. Only gcc and related bin-utils executables 387 # are prefixed with $(CROSS_COMPILE). 388 # CROSS_COMPILE can be set on the command line 389 # make CROSS_COMPILE=ia64-linux- 390 # Alternatively CROSS_COMPILE can be set in the environment. 391 # Default value for CROSS_COMPILE is not to prefix executables 392 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 393 ARCH ?= $(SUBARCH) 394 395 # Architecture as present in compile.h 396 UTS_MACHINE := $(ARCH) 397 SRCARCH := $(ARCH) 398 399 # Additional ARCH settings for x86 400 ifeq ($(ARCH),i386) 401 SRCARCH := x86 402 endif 403 ifeq ($(ARCH),x86_64) 404 SRCARCH := x86 405 endif 406 407 # Additional ARCH settings for sparc 408 ifeq ($(ARCH),sparc32) 409 SRCARCH := sparc 410 endif 411 ifeq ($(ARCH),sparc64) 412 SRCARCH := sparc 413 endif 414 415 # Additional ARCH settings for parisc 416 ifeq ($(ARCH),parisc64) 417 SRCARCH := parisc 418 endif 419 420 export cross_compiling := 421 ifneq ($(SRCARCH),$(SUBARCH)) 422 cross_compiling := 1 423 endif 424 425 KCONFIG_CONFIG ?= .config 426 export KCONFIG_CONFIG 427 428 # SHELL used by kbuild 429 CONFIG_SHELL := sh 430 431 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 432 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 433 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 434 435 ifneq ($(LLVM),) 436 ifneq ($(filter %/,$(LLVM)),) 437 LLVM_PREFIX := $(LLVM) 438 else ifneq ($(filter -%,$(LLVM)),) 439 LLVM_SUFFIX := $(LLVM) 440 endif 441 442 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 443 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 444 else 445 HOSTCC = gcc 446 HOSTCXX = g++ 447 endif 448 HOSTRUSTC = rustc 449 HOSTPKG_CONFIG = pkg-config 450 451 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 452 -O2 -fomit-frame-pointer -std=gnu11 453 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) 454 KBUILD_USERLDFLAGS := $(USERLDFLAGS) 455 456 # These flags apply to all Rust code in the tree, including the kernel and 457 # host programs. 458 export rust_common_flags := --edition=2021 \ 459 -Zbinary_dep_depinfo=y \ 460 -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \ 461 -Dunreachable_pub -Dnon_ascii_idents \ 462 -Wmissing_docs \ 463 -Drustdoc::missing_crate_level_docs \ 464 -Dclippy::correctness -Dclippy::style \ 465 -Dclippy::suspicious -Dclippy::complexity \ 466 -Dclippy::perf \ 467 -Dclippy::let_unit_value -Dclippy::mut_mut \ 468 -Dclippy::needless_bitwise_bool \ 469 -Dclippy::needless_continue \ 470 -Dclippy::no_mangle_with_rust_abi \ 471 -Wclippy::dbg_macro 472 473 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) 474 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 475 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ 476 -Zallow-features= $(HOSTRUSTFLAGS) 477 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 478 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 479 480 # Make variables (CC, etc...) 481 CPP = $(CC) -E 482 ifneq ($(LLVM),) 483 CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 484 LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 485 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 486 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 487 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 488 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 489 READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 490 STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 491 else 492 CC = $(CROSS_COMPILE)gcc 493 LD = $(CROSS_COMPILE)ld 494 AR = $(CROSS_COMPILE)ar 495 NM = $(CROSS_COMPILE)nm 496 OBJCOPY = $(CROSS_COMPILE)objcopy 497 OBJDUMP = $(CROSS_COMPILE)objdump 498 READELF = $(CROSS_COMPILE)readelf 499 STRIP = $(CROSS_COMPILE)strip 500 endif 501 RUSTC = rustc 502 RUSTDOC = rustdoc 503 RUSTFMT = rustfmt 504 CLIPPY_DRIVER = clippy-driver 505 BINDGEN = bindgen 506 CARGO = cargo 507 PAHOLE = pahole 508 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 509 LEX = flex 510 YACC = bison 511 AWK = awk 512 INSTALLKERNEL := installkernel 513 PERL = perl 514 PYTHON3 = python3 515 CHECK = sparse 516 BASH = bash 517 KGZIP = gzip 518 KBZIP2 = bzip2 519 KLZOP = lzop 520 LZMA = lzma 521 LZ4 = lz4c 522 XZ = xz 523 ZSTD = zstd 524 525 PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) 526 527 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 528 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 529 NOSTDINC_FLAGS := 530 CFLAGS_MODULE = 531 RUSTFLAGS_MODULE = 532 AFLAGS_MODULE = 533 LDFLAGS_MODULE = 534 CFLAGS_KERNEL = 535 RUSTFLAGS_KERNEL = 536 AFLAGS_KERNEL = 537 LDFLAGS_vmlinux = 538 539 # Use USERINCLUDE when you must reference the UAPI directories only. 540 USERINCLUDE := \ 541 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 542 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 543 -I$(srctree)/include/uapi \ 544 -I$(objtree)/include/generated/uapi \ 545 -include $(srctree)/include/linux/compiler-version.h \ 546 -include $(srctree)/include/linux/kconfig.h 547 548 # Use LINUXINCLUDE when you must reference the include/ directory. 549 # Needed to be compatible with the O= option 550 LINUXINCLUDE := \ 551 -I$(srctree)/arch/$(SRCARCH)/include \ 552 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 553 $(if $(building_out_of_srctree),-I$(srctree)/include) \ 554 -I$(objtree)/include \ 555 $(USERINCLUDE) 556 557 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 558 559 KBUILD_CFLAGS := 560 KBUILD_CFLAGS += -std=gnu11 561 KBUILD_CFLAGS += -fshort-wchar 562 KBUILD_CFLAGS += -funsigned-char 563 KBUILD_CFLAGS += -fno-common 564 KBUILD_CFLAGS += -fno-PIE 565 KBUILD_CFLAGS += -fno-strict-aliasing 566 567 KBUILD_CPPFLAGS := -D__KERNEL__ 568 KBUILD_RUSTFLAGS := $(rust_common_flags) \ 569 --target=$(objtree)/scripts/target.json \ 570 -Cpanic=abort -Cembed-bitcode=n -Clto=n \ 571 -Cforce-unwind-tables=n -Ccodegen-units=1 \ 572 -Csymbol-mangling-version=v0 \ 573 -Crelocation-model=static \ 574 -Zfunction-sections=n \ 575 -Dclippy::float_arithmetic 576 577 KBUILD_AFLAGS_KERNEL := 578 KBUILD_CFLAGS_KERNEL := 579 KBUILD_RUSTFLAGS_KERNEL := 580 KBUILD_AFLAGS_MODULE := -DMODULE 581 KBUILD_CFLAGS_MODULE := -DMODULE 582 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE 583 KBUILD_LDFLAGS_MODULE := 584 KBUILD_LDFLAGS := 585 CLANG_FLAGS := 586 587 ifeq ($(KBUILD_CLIPPY),1) 588 RUSTC_OR_CLIPPY_QUIET := CLIPPY 589 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 590 else 591 RUSTC_OR_CLIPPY_QUIET := RUSTC 592 RUSTC_OR_CLIPPY = $(RUSTC) 593 endif 594 595 ifdef RUST_LIB_SRC 596 export RUST_LIB_SRC 597 endif 598 599 # Allows the usage of unstable features in stable compilers. 600 export RUSTC_BOOTSTRAP := 1 601 602 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 603 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO 604 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS 605 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 606 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 607 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 608 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 609 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 610 611 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 612 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 613 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE 614 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 615 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE 616 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL 617 export PAHOLE_FLAGS 618 619 # Files to ignore in find ... statements 620 621 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 622 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 623 -prune -o 624 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 625 --exclude CVS --exclude .pc --exclude .hg --exclude .git 626 627 # =========================================================================== 628 # Rules shared between *config targets and build targets 629 630 # Basic helpers built in scripts/basic/ 631 PHONY += scripts_basic 632 scripts_basic: 633 $(Q)$(MAKE) $(build)=scripts/basic 634 635 PHONY += outputmakefile 636 ifdef building_out_of_srctree 637 # Before starting out-of-tree build, make sure the source tree is clean. 638 # outputmakefile generates a Makefile in the output directory, if using a 639 # separate output directory. This allows convenient use of make in the 640 # output directory. 641 # At the same time when output Makefile generated, generate .gitignore to 642 # ignore whole output directory 643 644 quiet_cmd_makefile = GEN Makefile 645 cmd_makefile = { \ 646 echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ 647 echo "include $(srctree)/Makefile"; \ 648 } > Makefile 649 650 outputmakefile: 651 @if [ -f $(srctree)/.config -o \ 652 -d $(srctree)/include/config -o \ 653 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 654 echo >&2 "***"; \ 655 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 656 echo >&2 "*** in $(abs_srctree)";\ 657 echo >&2 "***"; \ 658 false; \ 659 fi 660 $(Q)ln -fsn $(srctree) source 661 $(call cmd,makefile) 662 $(Q)test -e .gitignore || \ 663 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 664 endif 665 666 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 667 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 668 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 669 # and from include/config/auto.conf.cmd to detect the compiler upgrade. 670 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 671 672 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 673 include $(srctree)/scripts/Makefile.clang 674 endif 675 676 # Include this also for config targets because some architectures need 677 # cc-cross-prefix to determine CROSS_COMPILE. 678 ifdef need-compiler 679 include $(srctree)/scripts/Makefile.compiler 680 endif 681 682 ifdef config-build 683 # =========================================================================== 684 # *config targets only - make sure prerequisites are updated, and descend 685 # in scripts/kconfig to make the *config target 686 687 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 688 # KBUILD_DEFCONFIG may point out an alternative default configuration 689 # used for 'make defconfig' 690 include $(srctree)/arch/$(SRCARCH)/Makefile 691 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 692 693 config: outputmakefile scripts_basic FORCE 694 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 695 696 %config: outputmakefile scripts_basic FORCE 697 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 698 699 else #!config-build 700 # =========================================================================== 701 # Build targets only - this includes vmlinux, arch specific targets, clean 702 # targets and others. In general all targets except *config targets. 703 704 # If building an external module we do not care about the all: rule 705 # but instead __all depend on modules 706 PHONY += all 707 ifeq ($(KBUILD_EXTMOD),) 708 __all: all 709 else 710 __all: modules 711 endif 712 713 targets := 714 715 # Decide whether to build built-in, modular, or both. 716 # Normally, just do built-in. 717 718 KBUILD_MODULES := 719 KBUILD_BUILTIN := 1 720 721 # If we have only "make modules", don't compile built-in objects. 722 ifeq ($(MAKECMDGOALS),modules) 723 KBUILD_BUILTIN := 724 endif 725 726 # If we have "make <whatever> modules", compile modules 727 # in addition to whatever we do anyway. 728 # Just "make" or "make all" shall build modules as well 729 730 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) 731 KBUILD_MODULES := 1 732 endif 733 734 ifeq ($(MAKECMDGOALS),) 735 KBUILD_MODULES := 1 736 endif 737 738 export KBUILD_MODULES KBUILD_BUILTIN 739 740 ifdef need-config 741 include include/config/auto.conf 742 endif 743 744 ifeq ($(KBUILD_EXTMOD),) 745 # Objects we will link into vmlinux / subdirs we need to visit 746 core-y := 747 drivers-y := 748 libs-y := lib/ 749 endif # KBUILD_EXTMOD 750 751 # The all: target is the default when no target is given on the 752 # command line. 753 # This allow a user to issue only 'make' to build a kernel including modules 754 # Defaults to vmlinux, but the arch makefile usually adds further targets 755 all: vmlinux 756 757 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage 758 ifdef CONFIG_CC_IS_GCC 759 CFLAGS_GCOV += -fno-tree-loop-im 760 endif 761 export CFLAGS_GCOV 762 763 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 764 ifdef CONFIG_FUNCTION_TRACER 765 CC_FLAGS_FTRACE := -pg 766 endif 767 768 include $(srctree)/arch/$(SRCARCH)/Makefile 769 770 ifdef need-config 771 ifdef may-sync-config 772 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if 773 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile 774 # because some architectures define CROSS_COMPILE there. 775 include include/config/auto.conf.cmd 776 777 $(KCONFIG_CONFIG): 778 @echo >&2 '***' 779 @echo >&2 '*** Configuration file "$@" not found!' 780 @echo >&2 '***' 781 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 782 @echo >&2 '*** "make menuconfig" or "make xconfig").' 783 @echo >&2 '***' 784 @/bin/false 785 786 # The actual configuration files used during the build are stored in 787 # include/generated/ and include/config/. Update them if .config is newer than 788 # include/config/auto.conf (which mirrors .config). 789 # 790 # This exploits the 'multi-target pattern rule' trick. 791 # The syncconfig should be executed only once to make all the targets. 792 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 793 # 794 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 795 # so you cannot notice that Kconfig is waiting for the user input. 796 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) 797 $(Q)$(kecho) " SYNC $@" 798 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 799 else # !may-sync-config 800 # External modules and some install targets need include/generated/autoconf.h 801 # and include/config/auto.conf but do not care if they are up-to-date. 802 # Use auto.conf to trigger the test 803 PHONY += include/config/auto.conf 804 805 include/config/auto.conf: 806 @test -e include/generated/autoconf.h -a -e $@ || ( \ 807 echo >&2; \ 808 echo >&2 " ERROR: Kernel configuration is invalid."; \ 809 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 810 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 811 echo >&2 ; \ 812 /bin/false) 813 814 endif # may-sync-config 815 endif # need-config 816 817 KBUILD_CFLAGS += -fno-delete-null-pointer-checks 818 819 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 820 KBUILD_CFLAGS += -O2 821 KBUILD_RUSTFLAGS += -Copt-level=2 822 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 823 KBUILD_CFLAGS += -Os 824 KBUILD_RUSTFLAGS += -Copt-level=s 825 endif 826 827 # Always set `debug-assertions` and `overflow-checks` because their default 828 # depends on `opt-level` and `debug-assertions`, respectively. 829 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) 830 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) 831 832 # Tell gcc to never replace conditional load with a non-conditional one 833 ifdef CONFIG_CC_IS_GCC 834 # gcc-10 renamed --param=allow-store-data-races=0 to 835 # -fno-allow-store-data-races. 836 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 837 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 838 endif 839 840 ifdef CONFIG_READABLE_ASM 841 # Disable optimizations that make assembler listings hard to read. 842 # reorder blocks reorders the control in the function 843 # ipa clone creates specialized cloned functions 844 # partial inlining inlines only parts of functions 845 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 846 endif 847 848 stackp-flags-y := -fno-stack-protector 849 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 850 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 851 852 KBUILD_CFLAGS += $(stackp-flags-y) 853 854 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings 855 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) 856 857 ifdef CONFIG_FRAME_POINTER 858 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 859 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 860 else 861 # Some targets (ARM with Thumb2, for example), can't be built with frame 862 # pointers. For those, we don't have FUNCTION_TRACER automatically 863 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 864 # incompatible with -fomit-frame-pointer with current GCC, so we don't use 865 # -fomit-frame-pointer with FUNCTION_TRACER. 866 # In the Rust target specification, "frame-pointer" is set explicitly 867 # to "may-omit". 868 ifndef CONFIG_FUNCTION_TRACER 869 KBUILD_CFLAGS += -fomit-frame-pointer 870 endif 871 endif 872 873 # Initialize all stack variables with a 0xAA pattern. 874 ifdef CONFIG_INIT_STACK_ALL_PATTERN 875 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 876 endif 877 878 # Initialize all stack variables with a zero value. 879 ifdef CONFIG_INIT_STACK_ALL_ZERO 880 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero 881 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 882 # https://github.com/llvm/llvm-project/issues/44842 883 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 884 export CC_AUTO_VAR_INIT_ZERO_ENABLER 885 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) 886 endif 887 endif 888 889 # While VLAs have been removed, GCC produces unreachable stack probes 890 # for the randomize_kstack_offset feature. Disable it for all compilers. 891 KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 892 893 # Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 894 ifdef CONFIG_ZERO_CALL_USED_REGS 895 KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 896 endif 897 898 ifdef CONFIG_FUNCTION_TRACER 899 ifdef CONFIG_FTRACE_MCOUNT_USE_CC 900 CC_FLAGS_FTRACE += -mrecord-mcount 901 ifdef CONFIG_HAVE_NOP_MCOUNT 902 ifeq ($(call cc-option-yn, -mnop-mcount),y) 903 CC_FLAGS_FTRACE += -mnop-mcount 904 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 905 endif 906 endif 907 endif 908 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 909 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT 910 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 911 endif 912 endif 913 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 914 ifdef CONFIG_HAVE_C_RECORDMCOUNT 915 BUILD_C_RECORDMCOUNT := y 916 export BUILD_C_RECORDMCOUNT 917 endif 918 endif 919 ifdef CONFIG_HAVE_FENTRY 920 # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 921 ifeq ($(call cc-option-yn, -mfentry),y) 922 CC_FLAGS_FTRACE += -mfentry 923 CC_FLAGS_USING += -DCC_USING_FENTRY 924 endif 925 endif 926 export CC_FLAGS_FTRACE 927 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 928 KBUILD_AFLAGS += $(CC_FLAGS_USING) 929 endif 930 931 # We trigger additional mismatches with less inlining 932 ifdef CONFIG_DEBUG_SECTION_MISMATCH 933 KBUILD_CFLAGS += -fno-inline-functions-called-once 934 endif 935 936 # `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). 937 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 938 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 939 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y 940 LDFLAGS_vmlinux += --gc-sections 941 endif 942 943 ifdef CONFIG_SHADOW_CALL_STACK 944 ifndef CONFIG_DYNAMIC_SCS 945 CC_FLAGS_SCS := -fsanitize=shadow-call-stack 946 KBUILD_CFLAGS += $(CC_FLAGS_SCS) 947 endif 948 export CC_FLAGS_SCS 949 endif 950 951 ifdef CONFIG_LTO_CLANG 952 ifdef CONFIG_LTO_CLANG_THIN 953 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 954 else 955 CC_FLAGS_LTO := -flto 956 endif 957 CC_FLAGS_LTO += -fvisibility=hidden 958 959 # Limit inlining across translation units to reduce binary size 960 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 961 962 # Check for frame size exceeding threshold during prolog/epilog insertion 963 # when using lld < 13.0.0. 964 ifneq ($(CONFIG_FRAME_WARN),0) 965 ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y) 966 KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) 967 endif 968 endif 969 endif 970 971 ifdef CONFIG_LTO 972 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 973 KBUILD_AFLAGS += -fno-lto 974 export CC_FLAGS_LTO 975 endif 976 977 ifdef CONFIG_CFI_CLANG 978 CC_FLAGS_CFI := -fsanitize=kcfi 979 KBUILD_CFLAGS += $(CC_FLAGS_CFI) 980 export CC_FLAGS_CFI 981 endif 982 983 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) 984 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) 985 endif 986 987 # arch Makefile may override CC so keep this after arch Makefile is included 988 NOSTDINC_FLAGS += -nostdinc 989 990 # To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE, 991 # the kernel uses only C99 flexible arrays for dynamically sized trailing 992 # arrays. Enforce this for everything that may examine structure sizes and 993 # perform bounds checking. 994 KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3) 995 996 # disable invalid "can't wrap" optimizations for signed / pointers 997 KBUILD_CFLAGS += -fno-strict-overflow 998 999 # Make sure -fstack-check isn't enabled (like gentoo apparently did) 1000 KBUILD_CFLAGS += -fno-stack-check 1001 1002 # conserve stack if available 1003 ifdef CONFIG_CC_IS_GCC 1004 KBUILD_CFLAGS += -fconserve-stack 1005 endif 1006 1007 # change __FILE__ to the relative path from the srctree 1008 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 1009 1010 # include additional Makefiles when needed 1011 include-y := scripts/Makefile.extrawarn 1012 include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1013 include-$(CONFIG_KASAN) += scripts/Makefile.kasan 1014 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1015 include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan 1016 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1017 include-$(CONFIG_KCOV) += scripts/Makefile.kcov 1018 include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1019 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1020 1021 include $(addprefix $(srctree)/, $(include-y)) 1022 1023 # scripts/Makefile.gcc-plugins is intentionally included last. 1024 # Do not add $(call cc-option,...) below this line. When you build the kernel 1025 # from the clean source tree, the GCC plugins do not exist at this point. 1026 1027 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments 1028 KBUILD_CPPFLAGS += $(KCPPFLAGS) 1029 KBUILD_AFLAGS += $(KAFLAGS) 1030 KBUILD_CFLAGS += $(KCFLAGS) 1031 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) 1032 1033 KBUILD_LDFLAGS_MODULE += --build-id=sha1 1034 LDFLAGS_vmlinux += --build-id=sha1 1035 1036 KBUILD_LDFLAGS += -z noexecstack 1037 ifeq ($(CONFIG_LD_IS_BFD),y) 1038 KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 1039 endif 1040 1041 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1042 LDFLAGS_vmlinux += -X 1043 endif 1044 1045 ifeq ($(CONFIG_RELR),y) 1046 # ld.lld before 15 did not support -z pack-relative-relocs. 1047 LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) 1048 endif 1049 1050 # We never want expected sections to be placed heuristically by the 1051 # linker. All sections should be explicitly named in the linker script. 1052 ifdef CONFIG_LD_ORPHAN_WARN 1053 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) 1054 endif 1055 1056 # Align the bit size of userspace programs with the kernel 1057 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 1058 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 1059 1060 # make the checker run with the right architecture 1061 CHECKFLAGS += --arch=$(ARCH) 1062 1063 # insure the checker run with the right endianness 1064 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 1065 1066 # the checker needs the correct machine size 1067 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1068 1069 # Default kernel image to build when no specific target is given. 1070 # KBUILD_IMAGE may be overruled on the command line or 1071 # set in the environment 1072 # Also any assignments in arch/$(ARCH)/Makefile take precedence over 1073 # this default value 1074 export KBUILD_IMAGE ?= vmlinux 1075 1076 # 1077 # INSTALL_PATH specifies where to place the updated kernel and system map 1078 # images. Default is /boot, but you can set it to other values 1079 export INSTALL_PATH ?= /boot 1080 1081 # 1082 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1083 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1084 # an argument if needed. Otherwise it defaults to the kernel install path 1085 # 1086 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1087 1088 # 1089 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 1090 # relocations required by build roots. This is not defined in the 1091 # makefile but the argument can be passed to make if needed. 1092 # 1093 1094 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 1095 export MODLIB 1096 1097 PHONY += prepare0 1098 1099 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 1100 export MODORDER := $(extmod_prefix)modules.order 1101 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps 1102 1103 ifeq ($(KBUILD_EXTMOD),) 1104 1105 build-dir := . 1106 clean-dirs := $(sort . Documentation \ 1107 $(patsubst %/,%,$(filter %/, $(core-) \ 1108 $(drivers-) $(libs-)))) 1109 1110 export ARCH_CORE := $(core-y) 1111 export ARCH_LIB := $(filter %/, $(libs-y)) 1112 export ARCH_DRIVERS := $(drivers-y) $(drivers-m) 1113 # Externally visible symbols (used by link-vmlinux.sh) 1114 1115 KBUILD_VMLINUX_OBJS := ./built-in.a 1116 ifdef CONFIG_MODULES 1117 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1118 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1119 else 1120 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) 1121 endif 1122 1123 export KBUILD_VMLINUX_LIBS 1124 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1125 1126 ifdef CONFIG_TRIM_UNUSED_KSYMS 1127 # For the kernel to actually contain only the needed exported symbols, 1128 # we have to build modules as well to determine what those symbols are. 1129 KBUILD_MODULES := 1 1130 endif 1131 1132 # '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 1133 quiet_cmd_ar_vmlinux.a = AR $@ 1134 cmd_ar_vmlinux.a = \ 1135 rm -f $@; \ 1136 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ 1137 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) 1138 1139 targets += vmlinux.a 1140 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE 1141 $(call if_changed,ar_vmlinux.a) 1142 1143 PHONY += vmlinux_o 1144 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 1145 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o 1146 1147 vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o 1148 @: 1149 1150 PHONY += vmlinux 1151 # LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, 1152 # not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is 1153 # unrelated; the decompressors just happen to have the same base name, 1154 # arch/*/boot/compressed/vmlinux. 1155 # Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. 1156 # 1157 # _LDFLAGS_vmlinux is a workaround for the 'private export' bug: 1158 # https://savannah.gnu.org/bugs/?61463 1159 # For Make > 4.4, the following simple code will work: 1160 # vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 1161 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 1162 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) 1163 vmlinux: vmlinux.o $(KBUILD_LDS) modpost 1164 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux 1165 1166 # The actual objects are generated when descending, 1167 # make sure no implicit rule kicks in 1168 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; 1169 1170 ifeq ($(origin KERNELRELEASE),file) 1171 filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) 1172 else 1173 filechk_kernel.release = echo $(KERNELRELEASE) 1174 endif 1175 1176 # Store (new) KERNELRELEASE string in include/config/kernel.release 1177 include/config/kernel.release: FORCE 1178 $(call filechk,kernel.release) 1179 1180 # Additional helpers built in scripts/ 1181 # Carefully list dependencies so we do not try to build scripts twice 1182 # in parallel 1183 PHONY += scripts 1184 scripts: scripts_basic scripts_dtc 1185 $(Q)$(MAKE) $(build)=$(@) 1186 1187 # Things we need to do before we recursively start building the kernel 1188 # or the modules are listed in "prepare". 1189 # A multi level approach is used. prepareN is processed before prepareN-1. 1190 # archprepare is used in arch Makefiles and when processed asm symlink, 1191 # version.h and scripts_basic is processed / created. 1192 1193 PHONY += prepare archprepare 1194 1195 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 1196 asm-generic $(version_h) include/generated/utsrelease.h \ 1197 include/generated/compile.h include/generated/autoconf.h remove-stale-files 1198 1199 prepare0: archprepare 1200 $(Q)$(MAKE) $(build)=scripts/mod 1201 $(Q)$(MAKE) $(build)=. prepare 1202 1203 # All the preparing.. 1204 prepare: prepare0 1205 ifdef CONFIG_RUST 1206 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh 1207 $(Q)$(MAKE) $(build)=rust 1208 endif 1209 1210 PHONY += remove-stale-files 1211 remove-stale-files: 1212 $(Q)$(srctree)/scripts/remove-stale-files 1213 1214 # Support for using generic headers in asm-generic 1215 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1216 1217 PHONY += asm-generic uapi-asm-generic 1218 asm-generic: uapi-asm-generic 1219 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1220 generic=include/asm-generic 1221 uapi-asm-generic: 1222 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1223 generic=include/uapi/asm-generic 1224 1225 # Generate some files 1226 # --------------------------------------------------------------------------- 1227 1228 # KERNELRELEASE can change from a few different places, meaning version.h 1229 # needs to be updated, so this check is forced on all builds 1230 1231 uts_len := 64 1232 define filechk_utsrelease.h 1233 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1234 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1235 exit 1; \ 1236 fi; \ 1237 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1238 endef 1239 1240 define filechk_version.h 1241 if [ $(SUBLEVEL) -gt 255 ]; then \ 1242 echo \#define LINUX_VERSION_CODE $(shell \ 1243 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 1244 else \ 1245 echo \#define LINUX_VERSION_CODE $(shell \ 1246 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1247 fi; \ 1248 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 1249 ((c) > 255 ? 255 : (c)))'; \ 1250 echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 1251 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 1252 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 1253 endef 1254 1255 $(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) 1256 $(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) 1257 $(version_h): FORCE 1258 $(call filechk,version.h) 1259 1260 include/generated/utsrelease.h: include/config/kernel.release FORCE 1261 $(call filechk,utsrelease.h) 1262 1263 filechk_compile.h = $(srctree)/scripts/mkcompile_h \ 1264 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" 1265 1266 include/generated/compile.h: FORCE 1267 $(call filechk,compile.h) 1268 1269 PHONY += headerdep 1270 headerdep: 1271 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1272 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1273 1274 # --------------------------------------------------------------------------- 1275 # Kernel headers 1276 1277 #Default location for installed headers 1278 export INSTALL_HDR_PATH = $(objtree)/usr 1279 1280 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1281 cmd_headers_install = \ 1282 mkdir -p $(INSTALL_HDR_PATH); \ 1283 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1284 usr/include $(INSTALL_HDR_PATH) 1285 1286 PHONY += headers_install 1287 headers_install: headers 1288 $(call cmd,headers_install) 1289 1290 PHONY += archheaders archscripts 1291 1292 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1293 1294 PHONY += headers 1295 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 1296 $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) 1297 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1298 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1299 1300 ifdef CONFIG_HEADERS_INSTALL 1301 prepare: headers 1302 endif 1303 1304 PHONY += scripts_unifdef 1305 scripts_unifdef: scripts_basic 1306 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1307 1308 # --------------------------------------------------------------------------- 1309 # Install 1310 1311 # Many distributions have the custom install script, /sbin/installkernel. 1312 # If DKMS is installed, 'make install' will eventually recurse back 1313 # to this Makefile to build and install external modules. 1314 # Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 1315 1316 quiet_cmd_install = INSTALL $(INSTALL_PATH) 1317 cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 1318 1319 # --------------------------------------------------------------------------- 1320 # vDSO install 1321 1322 PHONY += vdso_install 1323 vdso_install: export INSTALL_FILES = $(vdso-install-y) 1324 vdso_install: 1325 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst 1326 1327 # --------------------------------------------------------------------------- 1328 # Tools 1329 1330 ifdef CONFIG_OBJTOOL 1331 prepare: tools/objtool 1332 endif 1333 1334 ifdef CONFIG_BPF 1335 ifdef CONFIG_DEBUG_INFO_BTF 1336 prepare: tools/bpf/resolve_btfids 1337 endif 1338 endif 1339 1340 PHONY += resolve_btfids_clean 1341 1342 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 1343 1344 # tools/bpf/resolve_btfids directory might not exist 1345 # in output directory, skip its clean in that case 1346 resolve_btfids_clean: 1347 ifneq ($(wildcard $(resolve_btfids_O)),) 1348 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 1349 endif 1350 1351 # Clear a bunch of variables before executing the submake 1352 ifeq ($(quiet),silent_) 1353 tools_silent=s 1354 endif 1355 1356 tools/: FORCE 1357 $(Q)mkdir -p $(objtree)/tools 1358 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1359 1360 tools/%: FORCE 1361 $(Q)mkdir -p $(objtree)/tools 1362 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1363 1364 # --------------------------------------------------------------------------- 1365 # Kernel selftest 1366 1367 PHONY += kselftest 1368 kselftest: headers 1369 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1370 1371 kselftest-%: headers FORCE 1372 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1373 1374 PHONY += kselftest-merge 1375 kselftest-merge: 1376 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1377 $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1378 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1379 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1380 1381 # --------------------------------------------------------------------------- 1382 # Devicetree files 1383 1384 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1385 dtstree := arch/$(SRCARCH)/boot/dts 1386 endif 1387 1388 ifneq ($(dtstree),) 1389 1390 %.dtb: dtbs_prepare 1391 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1392 1393 %.dtbo: dtbs_prepare 1394 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1395 1396 PHONY += dtbs dtbs_prepare dtbs_install dtbs_check 1397 dtbs: dtbs_prepare 1398 $(Q)$(MAKE) $(build)=$(dtstree) 1399 1400 # include/config/kernel.release is actually needed when installing DTBs because 1401 # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make 1402 # dtbs_install depend on it as dtbs_install may run as root. 1403 dtbs_prepare: include/config/kernel.release scripts_dtc 1404 1405 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) 1406 export CHECK_DTBS=y 1407 endif 1408 1409 ifneq ($(CHECK_DTBS),) 1410 dtbs_prepare: dt_binding_check 1411 endif 1412 1413 dtbs_check: dtbs 1414 1415 dtbs_install: 1416 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) 1417 1418 ifdef CONFIG_OF_EARLY_FLATTREE 1419 all: dtbs 1420 endif 1421 1422 endif 1423 1424 PHONY += scripts_dtc 1425 scripts_dtc: scripts_basic 1426 $(Q)$(MAKE) $(build)=scripts/dtc 1427 1428 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1429 export CHECK_DT_BINDING=y 1430 endif 1431 1432 PHONY += dt_binding_check 1433 dt_binding_check: scripts_dtc 1434 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1435 1436 PHONY += dt_compatible_check 1437 dt_compatible_check: dt_binding_check 1438 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ 1439 1440 # --------------------------------------------------------------------------- 1441 # Modules 1442 1443 ifdef CONFIG_MODULES 1444 1445 # By default, build modules as well 1446 1447 all: modules 1448 1449 # When we're building modules with modversions, we need to consider 1450 # the built-in objects during the descend as well, in order to 1451 # make sure the checksums are up to date before we record them. 1452 ifdef CONFIG_MODVERSIONS 1453 KBUILD_BUILTIN := 1 1454 endif 1455 1456 # Build modules 1457 # 1458 1459 # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES 1460 # is an exception. 1461 ifdef CONFIG_DEBUG_INFO_BTF_MODULES 1462 KBUILD_BUILTIN := 1 1463 modules: vmlinux 1464 endif 1465 1466 modules: modules_prepare 1467 1468 # Target to prepare building external modules 1469 modules_prepare: prepare 1470 $(Q)$(MAKE) $(build)=scripts scripts/module.lds 1471 1472 endif # CONFIG_MODULES 1473 1474 ### 1475 # Cleaning is done on three levels. 1476 # make clean Delete most generated files 1477 # Leave enough to build external modules 1478 # make mrproper Delete the current configuration, and all generated files 1479 # make distclean Remove editor backup files, patch leftover files and the like 1480 1481 # Directories & files removed with 'make clean' 1482 CLEAN_FILES += vmlinux.symvers modules-only.symvers \ 1483 modules.builtin modules.builtin.modinfo modules.nsdeps \ 1484 compile_commands.json rust/test \ 1485 rust-project.json .vmlinux.objs .vmlinux.export.c 1486 1487 # Directories & files removed with 'make mrproper' 1488 MRPROPER_FILES += include/config include/generated \ 1489 arch/$(SRCARCH)/include/generated .objdiff \ 1490 debian snap tar-install \ 1491 .config .config.old .version \ 1492 Module.symvers \ 1493 certs/signing_key.pem \ 1494 certs/x509.genkey \ 1495 vmlinux-gdb.py \ 1496 kernel.spec rpmbuild \ 1497 rust/libmacros.so 1498 1499 # clean - Delete most, but leave enough to build external modules 1500 # 1501 clean: rm-files := $(CLEAN_FILES) 1502 1503 PHONY += archclean vmlinuxclean 1504 1505 vmlinuxclean: 1506 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1507 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1508 1509 clean: archclean vmlinuxclean resolve_btfids_clean 1510 1511 # mrproper - Delete all generated files, including .config 1512 # 1513 mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1514 mrproper-dirs := $(addprefix _mrproper_,scripts) 1515 1516 PHONY += $(mrproper-dirs) mrproper 1517 $(mrproper-dirs): 1518 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1519 1520 mrproper: clean $(mrproper-dirs) 1521 $(call cmd,rmfiles) 1522 @find . $(RCS_FIND_IGNORE) \ 1523 \( -name '*.rmeta' \) \ 1524 -type f -print | xargs rm -f 1525 1526 # distclean 1527 # 1528 PHONY += distclean 1529 1530 distclean: mrproper 1531 @find . $(RCS_FIND_IGNORE) \ 1532 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1533 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1534 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 1535 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 1536 -type f -print | xargs rm -f 1537 1538 1539 # Packaging of the kernel to various formats 1540 # --------------------------------------------------------------------------- 1541 1542 %src-pkg: FORCE 1543 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1544 %pkg: include/config/kernel.release FORCE 1545 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1546 1547 # Brief documentation of the typical targets used 1548 # --------------------------------------------------------------------------- 1549 1550 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1551 boards := $(sort $(notdir $(boards))) 1552 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1553 board-dirs := $(sort $(notdir $(board-dirs:/=))) 1554 1555 PHONY += help 1556 help: 1557 @echo 'Cleaning targets:' 1558 @echo ' clean - Remove most generated files but keep the config and' 1559 @echo ' enough build support to build external modules' 1560 @echo ' mrproper - Remove all generated files + config + various backup files' 1561 @echo ' distclean - mrproper + remove editor backup and patch files' 1562 @echo '' 1563 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1564 @echo '' 1565 @echo 'Other generic targets:' 1566 @echo ' all - Build all targets marked with [*]' 1567 @echo '* vmlinux - Build the bare kernel' 1568 @echo '* modules - Build all modules' 1569 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1570 @echo ' vdso_install - Install unstripped vdso to INSTALL_MOD_PATH (default: /)' 1571 @echo ' dir/ - Build all files in dir and below' 1572 @echo ' dir/file.[ois] - Build specified target only' 1573 @echo ' dir/file.ll - Build the LLVM assembly file' 1574 @echo ' (requires compiler support for LLVM assembly generation)' 1575 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1576 @echo ' (requires a recent binutils and recent build (System.map))' 1577 @echo ' dir/file.ko - Build module including final link' 1578 @echo ' modules_prepare - Set up for building external modules' 1579 @echo ' tags/TAGS - Generate tags file for editors' 1580 @echo ' cscope - Generate cscope index' 1581 @echo ' gtags - Generate GNU GLOBAL index' 1582 @echo ' kernelrelease - Output the release version string (use with make -s)' 1583 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1584 @echo ' image_name - Output the image name (use with make -s)' 1585 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1586 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1587 echo '' 1588 @echo 'Static analysers:' 1589 @echo ' checkstack - Generate a list of stack hogs' 1590 @echo ' versioncheck - Sanity check on version.h usage' 1591 @echo ' includecheck - Check for duplicate included header files' 1592 @echo ' export_report - List the usages of all exported symbols' 1593 @echo ' headerdep - Detect inclusion cycles in headers' 1594 @echo ' coccicheck - Check with Coccinelle' 1595 @echo ' clang-analyzer - Check with clang static analyzer' 1596 @echo ' clang-tidy - Check with clang-tidy' 1597 @echo '' 1598 @echo 'Tools:' 1599 @echo ' nsdeps - Generate missing symbol namespace dependencies' 1600 @echo '' 1601 @echo 'Kernel selftest:' 1602 @echo ' kselftest - Build and run kernel selftest' 1603 @echo ' Build, install, and boot kernel before' 1604 @echo ' running kselftest on it' 1605 @echo ' Run as root for full coverage' 1606 @echo ' kselftest-all - Build kernel selftest' 1607 @echo ' kselftest-install - Build and install kernel selftest' 1608 @echo ' kselftest-clean - Remove all generated kselftest files' 1609 @echo ' kselftest-merge - Merge all the config dependencies of' 1610 @echo ' kselftest to existing .config.' 1611 @echo '' 1612 @echo 'Rust targets:' 1613 @echo ' rustavailable - Checks whether the Rust toolchain is' 1614 @echo ' available and, if not, explains why.' 1615 @echo ' rustfmt - Reformat all the Rust code in the kernel' 1616 @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' 1617 @echo ' is formatted, printing a diff otherwise.' 1618 @echo ' rustdoc - Generate Rust documentation' 1619 @echo ' (requires kernel .config)' 1620 @echo ' rusttest - Runs the Rust tests' 1621 @echo ' (requires kernel .config; downloads external repos)' 1622 @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' 1623 @echo ' (requires kernel .config)' 1624 @echo ' dir/file.[os] - Build specified target only' 1625 @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' 1626 @echo ' Run with RUSTFMT=n to skip reformatting if needed.' 1627 @echo ' The output is not intended to be compilable.' 1628 @echo ' dir/file.ll - Build the LLVM assembly file' 1629 @echo '' 1630 @$(if $(dtstree), \ 1631 echo 'Devicetree:'; \ 1632 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1633 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1634 echo ' dt_binding_check - Validate device tree binding documents'; \ 1635 echo ' dtbs_check - Validate device tree source files';\ 1636 echo '') 1637 1638 @echo 'Userspace tools targets:' 1639 @echo ' use "make tools/help"' 1640 @echo ' or "cd tools; make help"' 1641 @echo '' 1642 @echo 'Kernel packaging:' 1643 @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1644 @echo '' 1645 @echo 'Documentation targets:' 1646 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1647 @echo '' 1648 @echo 'Architecture specific targets ($(SRCARCH)):' 1649 @$(or $(archhelp),\ 1650 echo ' No architecture specific help defined for $(SRCARCH)') 1651 @echo '' 1652 @$(if $(boards), \ 1653 $(foreach b, $(boards), \ 1654 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1655 echo '') 1656 @$(if $(board-dirs), \ 1657 $(foreach b, $(board-dirs), \ 1658 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1659 printf " %-16s - Show all of the above\\n" help-boards; \ 1660 echo '') 1661 1662 @echo ' make V=n [targets] 1: verbose build' 1663 @echo ' 2: give reason for rebuild of target' 1664 @echo ' V=1 and V=2 can be combined with V=12' 1665 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1666 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1667 @echo ' (sparse by default)' 1668 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1669 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1670 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 1671 @echo ' 1: warnings which may be relevant and do not occur too often' 1672 @echo ' 2: warnings which occur quite often but may still be relevant' 1673 @echo ' 3: more obscure warnings, can most likely be ignored' 1674 @echo ' e: warnings are being treated as errors' 1675 @echo ' Multiple levels can be combined with W=12 or W=123' 1676 @$(if $(dtstree), \ 1677 echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ 1678 echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ 1679 ) 1680 @echo '' 1681 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1682 @echo 'For further info see the ./README file' 1683 1684 1685 help-board-dirs := $(addprefix help-,$(board-dirs)) 1686 1687 help-boards: $(help-board-dirs) 1688 1689 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1690 1691 $(help-board-dirs): help-%: 1692 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1693 @$(if $(boards-per-dir), \ 1694 $(foreach b, $(boards-per-dir), \ 1695 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1696 echo '') 1697 1698 1699 # Documentation targets 1700 # --------------------------------------------------------------------------- 1701 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1702 linkcheckdocs dochelp refcheckdocs texinfodocs infodocs 1703 PHONY += $(DOC_TARGETS) 1704 $(DOC_TARGETS): 1705 $(Q)$(MAKE) $(build)=Documentation $@ 1706 1707 1708 # Rust targets 1709 # --------------------------------------------------------------------------- 1710 1711 # "Is Rust available?" target 1712 PHONY += rustavailable 1713 rustavailable: 1714 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!" 1715 1716 # Documentation target 1717 # 1718 # Using the singular to avoid running afoul of `no-dot-config-targets`. 1719 PHONY += rustdoc 1720 rustdoc: prepare 1721 $(Q)$(MAKE) $(build)=rust $@ 1722 1723 # Testing target 1724 PHONY += rusttest 1725 rusttest: prepare 1726 $(Q)$(MAKE) $(build)=rust $@ 1727 1728 # Formatting targets 1729 PHONY += rustfmt rustfmtcheck 1730 1731 # We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. 1732 # 1733 # We match using absolute paths since `find` does not resolve them 1734 # when matching, which is a problem when e.g. `srctree` is `..`. 1735 # We `grep` afterwards in order to remove the directory entry itself. 1736 rustfmt: 1737 $(Q)find $(abs_srctree) -type f -name '*.rs' \ 1738 -o -path $(abs_srctree)/rust/alloc -prune \ 1739 -o -path $(abs_objtree)/rust/test -prune \ 1740 | grep -Fv $(abs_srctree)/rust/alloc \ 1741 | grep -Fv $(abs_objtree)/rust/test \ 1742 | grep -Fv generated \ 1743 | xargs $(RUSTFMT) $(rustfmt_flags) 1744 1745 rustfmtcheck: rustfmt_flags = --check 1746 rustfmtcheck: rustfmt 1747 1748 # Misc 1749 # --------------------------------------------------------------------------- 1750 1751 PHONY += misc-check 1752 misc-check: 1753 $(Q)$(srctree)/scripts/misc-check 1754 1755 all: misc-check 1756 1757 PHONY += scripts_gdb 1758 scripts_gdb: prepare0 1759 $(Q)$(MAKE) $(build)=scripts/gdb 1760 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1761 1762 ifdef CONFIG_GDB_SCRIPTS 1763 all: scripts_gdb 1764 endif 1765 1766 else # KBUILD_EXTMOD 1767 1768 filechk_kernel.release = echo $(KERNELRELEASE) 1769 1770 ### 1771 # External module support. 1772 # When building external modules the kernel used as basis is considered 1773 # read-only, and no consistency checks are made and the make 1774 # system is not used on the basis kernel. If updates are required 1775 # in the basis kernel ordinary make commands (without M=...) must be used. 1776 1777 # We are always building only modules. 1778 KBUILD_BUILTIN := 1779 KBUILD_MODULES := 1 1780 1781 build-dir := $(KBUILD_EXTMOD) 1782 1783 compile_commands.json: $(extmod_prefix)compile_commands.json 1784 PHONY += compile_commands.json 1785 1786 clean-dirs := $(KBUILD_EXTMOD) 1787 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ 1788 $(KBUILD_EXTMOD)/compile_commands.json 1789 1790 PHONY += prepare 1791 # now expand this into a simple variable to reduce the cost of shell evaluations 1792 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 1793 prepare: 1794 @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 1795 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1796 echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 1797 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 1798 fi 1799 1800 PHONY += help 1801 help: 1802 @echo ' Building external modules.' 1803 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1804 @echo '' 1805 @echo ' modules - default target, build the module(s)' 1806 @echo ' modules_install - install the module' 1807 @echo ' clean - remove generated files in module directory only' 1808 @echo ' rust-analyzer - generate rust-project.json rust-analyzer support file' 1809 @echo '' 1810 1811 ifndef CONFIG_MODULES 1812 modules modules_install: __external_modules_error 1813 __external_modules_error: 1814 @echo >&2 '***' 1815 @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' 1816 @echo >&2 '*** You cannot build or install external modules.' 1817 @echo >&2 '***' 1818 @false 1819 endif 1820 1821 endif # KBUILD_EXTMOD 1822 1823 # --------------------------------------------------------------------------- 1824 # Modules 1825 1826 PHONY += modules modules_install modules_sign modules_prepare 1827 1828 modules_install: 1829 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \ 1830 sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y) 1831 1832 ifeq ($(CONFIG_MODULE_SIG),y) 1833 # modules_sign is a subset of modules_install. 1834 # 'make modules_install modules_sign' is equivalent to 'make modules_install'. 1835 modules_sign: modules_install 1836 @: 1837 else 1838 modules_sign: 1839 @echo >&2 '***' 1840 @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.' 1841 @echo >&2 '***' 1842 @false 1843 endif 1844 1845 ifdef CONFIG_MODULES 1846 1847 $(MODORDER): $(build-dir) 1848 @: 1849 1850 # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. 1851 # This is solely useful to speed up test compiles. 1852 modules: modpost 1853 ifneq ($(KBUILD_MODPOST_NOFINAL),1) 1854 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 1855 endif 1856 1857 PHONY += modules_check 1858 modules_check: $(MODORDER) 1859 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 1860 1861 else # CONFIG_MODULES 1862 1863 modules: 1864 @: 1865 1866 KBUILD_MODULES := 1867 1868 endif # CONFIG_MODULES 1869 1870 PHONY += modpost 1871 modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ 1872 $(if $(KBUILD_MODULES), modules_check) 1873 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1874 1875 # Single targets 1876 # --------------------------------------------------------------------------- 1877 # To build individual files in subdirectories, you can do like this: 1878 # 1879 # make foo/bar/baz.s 1880 # 1881 # The supported suffixes for single-target are listed in 'single-targets' 1882 # 1883 # To build only under specific subdirectories, you can do like this: 1884 # 1885 # make foo/bar/baz/ 1886 1887 ifdef single-build 1888 1889 # .ko is special because modpost is needed 1890 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1891 single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 1892 $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 1893 1894 $(single-ko): single_modules 1895 @: 1896 $(single-no-ko): $(build-dir) 1897 @: 1898 1899 # Remove MODORDER when done because it is not the real one. 1900 PHONY += single_modules 1901 single_modules: $(single-no-ko) modules_prepare 1902 $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER) 1903 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1904 ifneq ($(KBUILD_MODPOST_NOFINAL),1) 1905 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 1906 endif 1907 $(Q)rm -f $(MODORDER) 1908 1909 single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) 1910 1911 KBUILD_MODULES := 1 1912 1913 endif 1914 1915 # Preset locale variables to speed up the build process. Limit locale 1916 # tweaks to this spot to avoid wrong language settings when running 1917 # make menuconfig etc. 1918 # Error messages still appears in the original language 1919 PHONY += $(build-dir) 1920 $(build-dir): prepare 1921 $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) 1922 1923 clean-dirs := $(addprefix _clean_, $(clean-dirs)) 1924 PHONY += $(clean-dirs) clean 1925 $(clean-dirs): 1926 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1927 1928 clean: $(clean-dirs) 1929 $(call cmd,rmfiles) 1930 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1931 \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ 1932 -o -name '*.ko.*' \ 1933 -o -name '*.dtb' -o -name '*.dtbo' \ 1934 -o -name '*.dtb.S' -o -name '*.dtbo.S' \ 1935 -o -name '*.dt.yaml' \ 1936 -o -name '*.dwo' -o -name '*.lst' \ 1937 -o -name '*.su' -o -name '*.mod' \ 1938 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1939 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1940 -o -name '*.asn1.[ch]' \ 1941 -o -name '*.symtypes' -o -name 'modules.order' \ 1942 -o -name '*.c.[012]*.*' \ 1943 -o -name '*.ll' \ 1944 -o -name '*.gcno' \ 1945 -o -name '*.*.symversions' \) -type f -print \ 1946 -o -name '.tmp_*' -print \ 1947 | xargs rm -rf 1948 1949 # Generate tags for editors 1950 # --------------------------------------------------------------------------- 1951 quiet_cmd_tags = GEN $@ 1952 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 1953 1954 tags TAGS cscope gtags: FORCE 1955 $(call cmd,tags) 1956 1957 # IDE support targets 1958 PHONY += rust-analyzer 1959 rust-analyzer: 1960 $(Q)$(MAKE) $(build)=rust $@ 1961 1962 # Script to generate missing namespace dependencies 1963 # --------------------------------------------------------------------------- 1964 1965 PHONY += nsdeps 1966 nsdeps: export KBUILD_NSDEPS=1 1967 nsdeps: modules 1968 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1969 1970 # Clang Tooling 1971 # --------------------------------------------------------------------------- 1972 1973 quiet_cmd_gen_compile_commands = GEN $@ 1974 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 1975 1976 $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ 1977 $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ 1978 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE 1979 $(call if_changed,gen_compile_commands) 1980 1981 targets += $(extmod_prefix)compile_commands.json 1982 1983 PHONY += clang-tidy clang-analyzer 1984 1985 ifdef CONFIG_CC_IS_CLANG 1986 quiet_cmd_clang_tools = CHECK $< 1987 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 1988 1989 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json 1990 $(call cmd,clang_tools) 1991 else 1992 clang-tidy clang-analyzer: 1993 @echo "$@ requires CC=clang" >&2 1994 @false 1995 endif 1996 1997 # Scripts to check various things for consistency 1998 # --------------------------------------------------------------------------- 1999 2000 PHONY += includecheck versioncheck coccicheck export_report 2001 2002 includecheck: 2003 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2004 -name '*.[hcS]' -type f -print | sort \ 2005 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 2006 2007 versioncheck: 2008 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2009 -name '*.[hcS]' -type f -print | sort \ 2010 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 2011 2012 coccicheck: 2013 $(Q)$(BASH) $(srctree)/scripts/$@ 2014 2015 export_report: 2016 $(PERL) $(srctree)/scripts/export_report.pl 2017 2018 PHONY += checkstack kernelrelease kernelversion image_name 2019 2020 # UML needs a little special treatment here. It wants to use the host 2021 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2022 # else wants $(ARCH), including people doing cross-builds, which means 2023 # that $(SUBARCH) doesn't work here. 2024 ifeq ($(ARCH), um) 2025 CHECKSTACK_ARCH := $(SUBARCH) 2026 else 2027 CHECKSTACK_ARCH := $(ARCH) 2028 endif 2029 checkstack: 2030 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 2031 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 2032 2033 kernelrelease: 2034 @$(filechk_kernel.release) 2035 2036 kernelversion: 2037 @echo $(KERNELVERSION) 2038 2039 image_name: 2040 @echo $(KBUILD_IMAGE) 2041 2042 PHONY += run-command 2043 run-command: 2044 $(Q)$(KBUILD_RUN_COMMAND) 2045 2046 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 2047 cmd_rmfiles = rm -rf $(rm-files) 2048 2049 # read saved command lines for existing targets 2050 existing-targets := $(wildcard $(sort $(targets))) 2051 2052 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 2053 2054 endif # config-build 2055 endif # mixed-build 2056 endif # need-sub-make 2057 2058 PHONY += FORCE 2059 FORCE: 2060 2061 # Declare the contents of the PHONY variable as phony. We keep that 2062 # information in a variable so we can use it in if_changed and friends. 2063 .PHONY: $(PHONY) 2064