1# SPDX-License-Identifier: GPL-2.0 2VERSION = 7 3PATCHLEVEL = 0 4SUBLEVEL = 0 5EXTRAVERSION = 6NAME = Baby Opossum Posse 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 14ifeq ($(filter output-sync,$(.FEATURES)),) 15$(error GNU Make >= 4.0 is required. Your Make version is $(MAKE_VERSION)) 16endif 17 18$(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 22PHONY := __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 41this-makefile := $(lastword $(MAKEFILE_LIST)) 42abs_srctree := $(realpath $(dir $(this-makefile))) 43abs_output := $(CURDIR) 44 45ifneq ($(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) 49MAKEFLAGS += -rR 50 51# Avoid funny character set dependencies 52unexport LC_ALL 53LC_COLLATE=C 54LC_NUMERIC=C 55export LC_COLLATE LC_NUMERIC 56 57# Avoid interference with shell env settings 58unexport 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) $(build)=scripts/basic 75# 76# If KBUILD_VERBOSE contains 1, the whole command is echoed. 77# If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed. 78# 79# To put more focus on warnings, be less verbose as default 80# Use 'make V=1' to see the full commands 81 82ifeq ("$(origin V)", "command line") 83 KBUILD_VERBOSE = $(V) 84endif 85 86quiet = quiet_ 87Q = @ 88 89ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) 90 quiet = 91 Q = 92endif 93 94# If the user is running make -s (silent mode), suppress echoing of 95# commands 96ifneq ($(findstring s,$(firstword -$(MAKEFLAGS))),) 97quiet=silent_ 98override KBUILD_VERBOSE := 99endif 100 101export quiet Q KBUILD_VERBOSE 102 103# Call a source code checker (by default, "sparse") as part of the 104# C compilation. 105# 106# Use 'make C=1' to enable checking of only re-compiled files. 107# Use 'make C=2' to enable checking of *all* source files, regardless 108# of whether they are re-compiled or not. 109# 110# See the file "Documentation/dev-tools/sparse.rst" for more details, 111# including where to get the "sparse" utility. 112 113ifeq ("$(origin C)", "command line") 114 KBUILD_CHECKSRC = $(C) 115endif 116ifndef KBUILD_CHECKSRC 117 KBUILD_CHECKSRC = 0 118endif 119 120export KBUILD_CHECKSRC 121 122# Enable "clippy" (a linter) as part of the Rust compilation. 123# 124# Use 'make CLIPPY=1' to enable it. 125ifeq ("$(origin CLIPPY)", "command line") 126 KBUILD_CLIPPY := $(CLIPPY) 127endif 128 129export KBUILD_CLIPPY 130 131# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 132# directory of external module to build. Setting M= takes precedence. 133ifeq ("$(origin M)", "command line") 134 KBUILD_EXTMOD := $(M) 135endif 136 137ifeq ("$(origin MO)", "command line") 138 KBUILD_EXTMOD_OUTPUT := $(MO) 139endif 140 141$(if $(word 2, $(KBUILD_EXTMOD)), \ 142 $(error building multiple external modules is not supported)) 143 144$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ 145 $(error module directory path cannot contain '$x'))) 146 147# Remove trailing slashes 148ifneq ($(filter %/, $(KBUILD_EXTMOD)),) 149KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) 150endif 151 152export KBUILD_EXTMOD 153 154ifeq ("$(origin W)", "command line") 155 KBUILD_EXTRA_WARN := $(W) 156endif 157 158export KBUILD_EXTRA_WARN 159 160# Kbuild will save output files in the current working directory. 161# This does not need to match to the root of the kernel source tree. 162# 163# For example, you can do this: 164# 165# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 166# 167# If you want to save output files in a different location, there are 168# two syntaxes to specify it. 169# 170# 1) O= 171# Use "make O=dir/to/store/output/files/" 172# 173# 2) Set KBUILD_OUTPUT 174# Set the environment variable KBUILD_OUTPUT to point to the output directory. 175# export KBUILD_OUTPUT=dir/to/store/output/files/; make 176# 177# The O= assignment takes precedence over the KBUILD_OUTPUT environment 178# variable. 179 180ifeq ("$(origin O)", "command line") 181 KBUILD_OUTPUT := $(O) 182endif 183 184ifdef KBUILD_EXTMOD 185 ifdef KBUILD_OUTPUT 186 objtree := $(realpath $(KBUILD_OUTPUT)) 187 $(if $(objtree),,$(error specified kernel directory "$(KBUILD_OUTPUT)" does not exist)) 188 else 189 objtree := $(abs_srctree) 190 endif 191 # If Make is invoked from the kernel directory (either kernel 192 # source directory or kernel build directory), external modules 193 # are built in $(KBUILD_EXTMOD) for backward compatibility, 194 # otherwise, built in the current directory. 195 output := $(or $(KBUILD_EXTMOD_OUTPUT),$(if $(filter $(CURDIR),$(objtree) $(abs_srctree)),$(KBUILD_EXTMOD))) 196 # KBUILD_EXTMOD might be a relative path. Remember its absolute path before 197 # Make changes the working directory. 198 srcroot := $(realpath $(KBUILD_EXTMOD)) 199 $(if $(srcroot),,$(error specified external module directory "$(KBUILD_EXTMOD)" does not exist)) 200else 201 objtree := . 202 output := $(KBUILD_OUTPUT) 203endif 204 205export objtree srcroot 206 207# Do we want to change the working directory? 208ifneq ($(output),) 209# $(realpath ...) gets empty if the path does not exist. Run 'mkdir -p' first. 210$(shell mkdir -p "$(output)") 211# $(realpath ...) resolves symlinks 212abs_output := $(realpath $(output)) 213$(if $(abs_output),,$(error failed to create output directory "$(output)")) 214endif 215 216ifneq ($(words $(subst :, ,$(abs_srctree))), 1) 217$(error source directory cannot contain spaces or colons) 218endif 219 220export sub_make_done := 1 221 222endif # sub_make_done 223 224ifeq ($(abs_output),$(CURDIR)) 225# Suppress "Entering directory ..." if we are at the final work directory. 226no-print-directory := --no-print-directory 227else 228# Recursion to show "Entering directory ..." 229need-sub-make := 1 230endif 231 232ifeq ($(filter --no-print-directory, $(MAKEFLAGS)),) 233# If --no-print-directory is unset, recurse once again to set it. 234# You may end up recursing into __sub-make twice. This is needed due to the 235# behavior change in GNU Make 4.4.1. 236need-sub-make := 1 237endif 238 239ifeq ($(need-sub-make),1) 240 241PHONY += $(MAKECMDGOALS) __sub-make 242 243$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make 244 @: 245 246# Invoke a second make in the output directory, passing relevant variables 247__sub-make: 248 $(Q)$(MAKE) $(no-print-directory) -C $(abs_output) \ 249 -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 250 251else # need-sub-make 252 253# We process the rest of the Makefile if this is the final invocation of make 254 255ifndef KBUILD_EXTMOD 256srcroot := $(abs_srctree) 257endif 258 259ifeq ($(srcroot),$(CURDIR)) 260building_out_of_srctree := 261else 262export building_out_of_srctree := 1 263endif 264 265ifdef KBUILD_ABS_SRCTREE 266 # Do nothing. Use the absolute path. 267else ifeq ($(srcroot),$(CURDIR)) 268 # Building in the source. 269 srcroot := . 270else ifeq ($(srcroot)/,$(dir $(CURDIR))) 271 # Building in a subdirectory of the source. 272 srcroot := .. 273endif 274 275export srctree := $(if $(KBUILD_EXTMOD),$(abs_srctree),$(srcroot)) 276 277ifdef building_out_of_srctree 278export VPATH := $(srcroot) 279else 280VPATH := 281endif 282 283# To make sure we do not include .config for any of the *config targets 284# catch them early, and hand them over to scripts/kconfig/Makefile 285# It is allowed to specify more targets when calling make, including 286# mixing *config targets and build targets. 287# For example 'make oldconfig all'. 288# Detect when mixed targets is specified, and make a second invocation 289# of make so .config is not included in this case either (for *config). 290 291version_h := include/generated/uapi/linux/version.h 292 293clean-targets := %clean mrproper cleandocs 294no-dot-config-targets := $(clean-targets) \ 295 cscope gtags TAGS tags help% %docs check% coccicheck \ 296 $(version_h) headers headers_% archheaders archscripts \ 297 %asm-generic kernelversion %src-pkg dt_binding_check \ 298 outputmakefile rustavailable rustfmt rustfmtcheck \ 299 run-command 300no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \ 301 image_name 302single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %/ 303 304config-build := 305mixed-build := 306need-config := 1 307may-sync-config := 1 308single-build := 309 310ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 311 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 312 need-config := 313 endif 314endif 315 316ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 317 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 318 may-sync-config := 319 endif 320endif 321 322need-compiler := $(may-sync-config) 323 324ifneq ($(KBUILD_EXTMOD),) 325 may-sync-config := 326endif 327 328ifeq ($(KBUILD_EXTMOD),) 329 ifneq ($(filter %config,$(MAKECMDGOALS)),) 330 config-build := 1 331 ifneq ($(words $(MAKECMDGOALS)),1) 332 mixed-build := 1 333 endif 334 endif 335endif 336 337# We cannot build single targets and the others at the same time 338ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 339 single-build := 1 340 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 341 mixed-build := 1 342 endif 343endif 344 345# For "make -j clean all", "make -j mrproper defconfig all", etc. 346ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 347 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 348 mixed-build := 1 349 endif 350endif 351 352# install and modules_install need also be processed one by one 353ifneq ($(filter install,$(MAKECMDGOALS)),) 354 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 355 mixed-build := 1 356 endif 357endif 358 359ifdef mixed-build 360# =========================================================================== 361# We're called with mixed targets (*config and build targets). 362# Handle them one by one. 363 364PHONY += $(MAKECMDGOALS) __build_one_by_one 365 366$(MAKECMDGOALS): __build_one_by_one 367 @: 368 369__build_one_by_one: 370 $(Q)set -e; \ 371 for i in $(MAKECMDGOALS); do \ 372 $(MAKE) -f $(srctree)/Makefile $$i; \ 373 done 374 375else # !mixed-build 376 377include $(srctree)/scripts/Kbuild.include 378 379# Read KERNELRELEASE from include/config/kernel.release (if it exists) 380KERNELRELEASE = $(call read-file, $(objtree)/include/config/kernel.release) 381KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 382export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 383 384include $(srctree)/scripts/subarch.include 385 386# Cross compiling and selecting different set of gcc/bin-utils 387# --------------------------------------------------------------------------- 388# 389# When performing cross compilation for other architectures ARCH shall be set 390# to the target architecture. (See arch/* for the possibilities). 391# ARCH can be set during invocation of make: 392# make ARCH=arm64 393# Another way is to have ARCH set in the environment. 394# The default ARCH is the host where make is executed. 395 396# CROSS_COMPILE specify the prefix used for all executables used 397# during compilation. Only gcc and related bin-utils executables 398# are prefixed with $(CROSS_COMPILE). 399# CROSS_COMPILE can be set on the command line 400# make CROSS_COMPILE=aarch64-linux-gnu- 401# Alternatively CROSS_COMPILE can be set in the environment. 402# Default value for CROSS_COMPILE is not to prefix executables 403# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 404ARCH ?= $(SUBARCH) 405 406# Architecture as present in compile.h 407UTS_MACHINE := $(ARCH) 408SRCARCH := $(ARCH) 409 410# Additional ARCH settings for x86 411ifeq ($(ARCH),i386) 412 SRCARCH := x86 413endif 414ifeq ($(ARCH),x86_64) 415 SRCARCH := x86 416endif 417 418# Additional ARCH settings for sparc 419ifeq ($(ARCH),sparc32) 420 SRCARCH := sparc 421endif 422ifeq ($(ARCH),sparc64) 423 SRCARCH := sparc 424endif 425 426# Additional ARCH settings for parisc 427ifeq ($(ARCH),parisc64) 428 SRCARCH := parisc 429endif 430 431export cross_compiling := 432ifneq ($(SRCARCH),$(SUBARCH)) 433cross_compiling := 1 434endif 435 436KCONFIG_CONFIG ?= .config 437export KCONFIG_CONFIG 438 439# SHELL used by kbuild 440CONFIG_SHELL := sh 441 442HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 443HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 444HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 445 446ifneq ($(LLVM),) 447ifneq ($(filter %/,$(LLVM)),) 448LLVM_PREFIX := $(LLVM) 449else ifneq ($(filter -%,$(LLVM)),) 450LLVM_SUFFIX := $(LLVM) 451else ifneq ($(LLVM),1) 452$(error Invalid value for LLVM, see Documentation/kbuild/llvm.rst) 453endif 454 455HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 456HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 457else 458HOSTCC = gcc 459HOSTCXX = g++ 460endif 461HOSTRUSTC = rustc 462HOSTPKG_CONFIG = pkg-config 463 464# the KERNELDOC macro needs to be exported, as scripts/Makefile.build 465# has a logic to call it 466KERNELDOC = $(srctree)/tools/docs/kernel-doc 467export KERNELDOC 468 469KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ 470 -O2 -fomit-frame-pointer -std=gnu11 471KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) 472KBUILD_USERLDFLAGS := $(USERLDFLAGS) 473 474# These flags apply to all Rust code in the tree, including the kernel and 475# host programs. 476export rust_common_flags := --edition=2021 \ 477 -Zbinary_dep_depinfo=y \ 478 -Astable_features \ 479 -Aunused_features \ 480 -Dnon_ascii_idents \ 481 -Dunsafe_op_in_unsafe_fn \ 482 -Wmissing_docs \ 483 -Wrust_2018_idioms \ 484 -Wunreachable_pub \ 485 -Wclippy::all \ 486 -Wclippy::as_ptr_cast_mut \ 487 -Wclippy::as_underscore \ 488 -Wclippy::cast_lossless \ 489 -Wclippy::ignored_unit_patterns \ 490 -Aclippy::incompatible_msrv \ 491 -Wclippy::mut_mut \ 492 -Wclippy::needless_bitwise_bool \ 493 -Aclippy::needless_lifetimes \ 494 -Wclippy::no_mangle_with_rust_abi \ 495 -Wclippy::ptr_as_ptr \ 496 -Wclippy::ptr_cast_constness \ 497 -Wclippy::ref_as_ptr \ 498 -Wclippy::undocumented_unsafe_blocks \ 499 -Aclippy::uninlined_format_args \ 500 -Wclippy::unnecessary_safety_comment \ 501 -Wclippy::unnecessary_safety_doc \ 502 -Wrustdoc::missing_crate_level_docs \ 503 -Wrustdoc::unescaped_backticks 504 505KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) \ 506 $(HOSTCFLAGS) -I $(srctree)/scripts/include 507KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) \ 508 -I $(srctree)/scripts/include 509KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ 510 -Zallow-features= 511KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 512KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 513KBUILD_PROCMACROLDFLAGS := $(or $(PROCMACROLDFLAGS),$(KBUILD_HOSTLDFLAGS)) 514 515# Make variables (CC, etc...) 516CPP = $(CC) -E 517ifneq ($(LLVM),) 518CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 519LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 520AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 521LLVM_LINK = $(LLVM_PREFIX)llvm-link$(LLVM_SUFFIX) 522NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 523OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 524OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 525READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 526STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 527else 528CC = $(CROSS_COMPILE)gcc 529LD = $(CROSS_COMPILE)ld 530AR = $(CROSS_COMPILE)ar 531NM = $(CROSS_COMPILE)nm 532OBJCOPY = $(CROSS_COMPILE)objcopy 533OBJDUMP = $(CROSS_COMPILE)objdump 534READELF = $(CROSS_COMPILE)readelf 535STRIP = $(CROSS_COMPILE)strip 536endif 537RUSTC = rustc 538RUSTDOC = rustdoc 539RUSTFMT = rustfmt 540CLIPPY_DRIVER = clippy-driver 541BINDGEN = bindgen 542PAHOLE = pahole 543RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 544LEX = flex 545YACC = bison 546AWK = awk 547INSTALLKERNEL := installkernel 548PERL = perl 549PYTHON3 = python3 550CHECK = sparse 551BASH = bash 552KGZIP = gzip 553KBZIP2 = bzip2 554KLZOP = lzop 555LZMA = lzma 556LZ4 = lz4 557XZ = xz 558ZSTD = zstd 559TAR = tar 560 561CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 562 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 563NOSTDINC_FLAGS := 564CFLAGS_MODULE = 565RUSTFLAGS_MODULE = 566AFLAGS_MODULE = 567LDFLAGS_MODULE = 568CFLAGS_KERNEL = 569RUSTFLAGS_KERNEL = 570AFLAGS_KERNEL = 571LDFLAGS_vmlinux = 572 573# Use USERINCLUDE when you must reference the UAPI directories only. 574USERINCLUDE := \ 575 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 576 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 577 -I$(srctree)/include/uapi \ 578 -I$(objtree)/include/generated/uapi \ 579 -include $(srctree)/include/linux/compiler-version.h \ 580 -include $(srctree)/include/linux/kconfig.h 581 582# Use LINUXINCLUDE when you must reference the include/ directory. 583# Needed to be compatible with the O= option 584LINUXINCLUDE := \ 585 -I$(srctree)/arch/$(SRCARCH)/include \ 586 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 587 -I$(srctree)/include \ 588 -I$(objtree)/include \ 589 $(USERINCLUDE) 590 591KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 592 593KBUILD_CFLAGS := 594KBUILD_CFLAGS += -std=gnu11 595KBUILD_CFLAGS += -fshort-wchar 596KBUILD_CFLAGS += -funsigned-char 597KBUILD_CFLAGS += -fno-common 598KBUILD_CFLAGS += -fno-PIE 599KBUILD_CFLAGS += -fno-strict-aliasing 600 601KBUILD_CPPFLAGS := -D__KERNEL__ 602KBUILD_RUSTFLAGS := $(rust_common_flags) \ 603 -Cpanic=abort -Cembed-bitcode=n -Clto=n \ 604 -Cforce-unwind-tables=n -Ccodegen-units=1 \ 605 -Csymbol-mangling-version=v0 \ 606 -Crelocation-model=static \ 607 -Zfunction-sections=n \ 608 -Wclippy::float_arithmetic 609 610KBUILD_AFLAGS_KERNEL := 611KBUILD_CFLAGS_KERNEL := 612KBUILD_RUSTFLAGS_KERNEL := 613KBUILD_AFLAGS_MODULE := -DMODULE 614KBUILD_CFLAGS_MODULE := -DMODULE 615KBUILD_RUSTFLAGS_MODULE := --cfg MODULE 616KBUILD_LDFLAGS_MODULE := 617KBUILD_LDFLAGS := 618CLANG_FLAGS := 619 620ifeq ($(KBUILD_CLIPPY),1) 621 RUSTC_OR_CLIPPY_QUIET := CLIPPY 622 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 623else 624 RUSTC_OR_CLIPPY_QUIET := RUSTC 625 RUSTC_OR_CLIPPY = $(RUSTC) 626endif 627 628# Allows the usage of unstable features in stable compilers. 629export RUSTC_BOOTSTRAP := 1 630 631# Allows finding `.clippy.toml` in out-of-srctree builds. 632export CLIPPY_CONF_DIR := $(srctree) 633 634export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 635export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN LLVM_LINK 636export HOSTRUSTC KBUILD_HOSTRUSTFLAGS 637export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 638export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 639export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD TAR 640export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS KBUILD_PROCMACROLDFLAGS LDFLAGS_MODULE 641export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 642 643export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 644export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 645export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE 646export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 647export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE 648export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL 649 650# Files to ignore in find ... statements 651 652export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 653 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 654 -prune -o 655 656# =========================================================================== 657# Rules shared between *config targets and build targets 658 659# Basic helpers built in scripts/basic/ 660PHONY += scripts_basic 661scripts_basic: 662 $(Q)$(MAKE) $(build)=scripts/basic 663 664PHONY += outputmakefile 665ifdef building_out_of_srctree 666# Before starting out-of-tree build, make sure the source tree is clean. 667# outputmakefile generates a Makefile in the output directory, if using a 668# separate output directory. This allows convenient use of make in the 669# output directory. 670# At the same time when output Makefile generated, generate .gitignore to 671# ignore whole output directory 672 673ifdef KBUILD_EXTMOD 674print_env_for_makefile = \ 675 echo "export KBUILD_OUTPUT = $(objtree)"; \ 676 echo "export KBUILD_EXTMOD = $(realpath $(srcroot))" ; \ 677 echo "export KBUILD_EXTMOD_OUTPUT = $(CURDIR)" 678else 679print_env_for_makefile = \ 680 echo "export KBUILD_OUTPUT = $(CURDIR)" 681endif 682 683quiet_cmd_makefile = GEN Makefile 684 cmd_makefile = { \ 685 echo "\# Automatically generated by $(abs_srctree)/Makefile: don't edit"; \ 686 $(print_env_for_makefile); \ 687 echo "include $(abs_srctree)/Makefile"; \ 688 } > Makefile 689 690outputmakefile: 691ifeq ($(KBUILD_EXTMOD),) 692 @if [ -f $(srctree)/.config -o \ 693 -d $(srctree)/include/config -o \ 694 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 695 echo >&2 "***"; \ 696 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 697 echo >&2 "*** in $(abs_srctree)";\ 698 echo >&2 "***"; \ 699 false; \ 700 fi 701else 702 @if [ -f $(srcroot)/modules.order ]; then \ 703 echo >&2 "***"; \ 704 echo >&2 "*** The external module source tree is not clean."; \ 705 echo >&2 "*** Please run 'make -C $(abs_srctree) M=$(realpath $(srcroot)) clean'"; \ 706 echo >&2 "***"; \ 707 false; \ 708 fi 709endif 710 $(Q)ln -fsn $(srcroot) source 711 $(call cmd,makefile) 712 $(Q)test -e .gitignore || \ 713 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 714endif 715 716# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 717# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 718# CC_VERSION_TEXT, RUSTC_VERSION_TEXT and PAHOLE_VERSION are referenced from 719# Kconfig (so they need export), and from include/config/auto.conf.cmd to 720# detect the version changes between builds. 721CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 722RUSTC_VERSION_TEXT = $(subst $(pound),,$(shell $(RUSTC) --version 2>/dev/null)) 723PAHOLE_VERSION = $(shell $(srctree)/scripts/pahole-version.sh $(PAHOLE)) 724 725ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 726include $(srctree)/scripts/Makefile.clang 727endif 728 729# Include this also for config targets because some architectures need 730# cc-cross-prefix to determine CROSS_COMPILE. 731ifdef need-compiler 732include $(srctree)/scripts/Makefile.compiler 733endif 734 735ifdef config-build 736# =========================================================================== 737# *config targets only - make sure prerequisites are updated, and descend 738# in scripts/kconfig to make the *config target 739 740# Read arch-specific Makefile to set KBUILD_DEFCONFIG as needed. 741# KBUILD_DEFCONFIG may point out an alternative default configuration 742# used for 'make defconfig' 743include $(srctree)/arch/$(SRCARCH)/Makefile 744export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT RUSTC_VERSION_TEXT PAHOLE_VERSION 745 746config: outputmakefile scripts_basic FORCE 747 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 748 749%config: outputmakefile scripts_basic FORCE 750 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 751 752else #!config-build 753# =========================================================================== 754# Build targets only - this includes vmlinux, arch-specific targets, clean 755# targets and others. In general all targets except *config targets. 756 757# If building an external module we do not care about the all: rule 758# but instead __all depend on modules 759PHONY += all 760ifeq ($(KBUILD_EXTMOD),) 761__all: all 762else 763__all: modules 764endif 765 766targets := 767 768# Decide whether to build built-in, modular, or both. 769# Normally, just do built-in. 770 771KBUILD_MODULES := 772KBUILD_BUILTIN := y 773 774# If we have only "make modules", don't compile built-in objects. 775ifeq ($(MAKECMDGOALS),modules) 776 KBUILD_BUILTIN := 777endif 778 779# If we have "make <whatever> modules", compile modules 780# in addition to whatever we do anyway. 781# Just "make" or "make all" shall build modules as well 782 783ifneq ($(filter all modules nsdeps compile_commands.json clang-%,$(MAKECMDGOALS)),) 784 KBUILD_MODULES := y 785endif 786 787ifeq ($(MAKECMDGOALS),) 788 KBUILD_MODULES := y 789endif 790 791export KBUILD_MODULES KBUILD_BUILTIN 792 793ifdef need-config 794include $(objtree)/include/config/auto.conf 795endif 796 797ifeq ($(KBUILD_EXTMOD),) 798# Objects we will link into vmlinux / subdirs we need to visit 799core-y := 800drivers-y := 801libs-y := lib/ 802endif # KBUILD_EXTMOD 803 804# The all: target is the default when no target is given on the 805# command line. 806# This allow a user to issue only 'make' to build a kernel including modules 807# Defaults to vmlinux, but the arch makefile usually adds further targets 808all: vmlinux 809 810CFLAGS_GCOV := -fprofile-arcs -ftest-coverage 811ifdef CONFIG_CC_IS_GCC 812CFLAGS_GCOV += -fno-tree-loop-im 813endif 814export CFLAGS_GCOV 815 816# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 817ifdef CONFIG_FUNCTION_TRACER 818 CC_FLAGS_FTRACE := -pg 819endif 820 821ifdef CONFIG_TRACEPOINTS 822# To check for unused tracepoints (tracepoints that are defined but never 823# called), run with: 824# 825# make UT=1 826# 827# Each unused tracepoints can take up to 5KB of memory in the running kernel. 828# It is best to remove any that are not used. 829# 830# This command line option will be removed when all current unused 831# tracepoints are removed. 832 833ifeq ("$(origin UT)", "command line") 834 WARN_ON_UNUSED_TRACEPOINTS := $(UT) 835endif 836endif # CONFIG_TRACEPOINTS 837 838export WARN_ON_UNUSED_TRACEPOINTS 839 840# Per-version Rust flags. These are like `rust_common_flags`, but may 841# depend on the Rust compiler version (e.g. using `rustc-min-version`). 842# 843# `-Aclippy::precedence`: the lint was extended in Rust 1.85.0 to 844# include bitmasking and shift operations. However, because it generated 845# many hits, in Rust 1.86.0 it was split into a new `precedence_bits` 846# lint which is not enabled by default. 847rust_common_flags_per_version := \ 848 $(if $(call rustc-min-version,108600),,-Aclippy::precedence) 849 850rust_common_flags += $(rust_common_flags_per_version) 851KBUILD_HOSTRUSTFLAGS += $(rust_common_flags_per_version) $(HOSTRUSTFLAGS) 852KBUILD_RUSTFLAGS += $(rust_common_flags_per_version) 853 854include $(srctree)/arch/$(SRCARCH)/Makefile 855 856ifdef need-config 857ifdef may-sync-config 858# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 859# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 860# because some architectures define CROSS_COMPILE there. 861include include/config/auto.conf.cmd 862 863$(KCONFIG_CONFIG): 864 @echo >&2 '***' 865 @echo >&2 '*** Configuration file "$@" not found!' 866 @echo >&2 '***' 867 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 868 @echo >&2 '*** "make menuconfig" or "make xconfig").' 869 @echo >&2 '***' 870 @/bin/false 871 872# The actual configuration files used during the build are stored in 873# include/generated/ and include/config/. Update them if .config is newer than 874# include/config/auto.conf (which mirrors .config). 875# 876# This exploits the 'multi-target pattern rule' trick. 877# The syncconfig should be executed only once to make all the targets. 878# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 879# 880# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 881# so you cannot notice that Kconfig is waiting for the user input. 882%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) 883 $(Q)$(kecho) " SYNC $@" 884 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 885else # !may-sync-config 886# External modules and some install targets need include/generated/autoconf.h 887# and include/config/auto.conf but do not care if they are up-to-date. 888# Use auto.conf to show the error message 889 890checked-configs := $(addprefix $(objtree)/, include/generated/autoconf.h include/generated/rustc_cfg include/config/auto.conf) 891missing-configs := $(filter-out $(wildcard $(checked-configs)), $(checked-configs)) 892 893ifdef missing-configs 894PHONY += $(objtree)/include/config/auto.conf 895 896$(objtree)/include/config/auto.conf: 897 @echo >&2 '***' 898 @echo >&2 '*** ERROR: Kernel configuration is invalid. The following files are missing:' 899 @printf >&2 '*** - %s\n' $(missing-configs) 900 @echo >&2 '*** Run "make oldconfig && make prepare" on kernel source to fix it.' 901 @echo >&2 '***' 902 @/bin/false 903endif 904 905endif # may-sync-config 906endif # need-config 907 908KBUILD_CFLAGS += -fno-delete-null-pointer-checks 909 910ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 911KBUILD_CFLAGS += -O2 912KBUILD_RUSTFLAGS += -Copt-level=2 913else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 914KBUILD_CFLAGS += -Os 915KBUILD_RUSTFLAGS += -Copt-level=s 916endif 917 918# Always set `debug-assertions` and `overflow-checks` because their default 919# depends on `opt-level` and `debug-assertions`, respectively. 920KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) 921KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) 922 923# Tell gcc to never replace conditional load with a non-conditional one 924ifdef CONFIG_CC_IS_GCC 925# gcc-10 renamed --param=allow-store-data-races=0 to 926# -fno-allow-store-data-races. 927KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 928KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 929endif 930 931ifdef CONFIG_READABLE_ASM 932# Disable optimizations that make assembler listings hard to read. 933# reorder blocks reorders the control in the function 934# ipa clone creates specialized cloned functions 935# partial inlining inlines only parts of functions 936KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 937endif 938 939stackp-flags-y := -fno-stack-protector 940stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 941stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 942 943KBUILD_CFLAGS += $(stackp-flags-y) 944 945ifdef CONFIG_FRAME_POINTER 946KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 947KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 948else 949# Some targets (ARM with Thumb2, for example), can't be built with frame 950# pointers. For those, we don't have FUNCTION_TRACER automatically 951# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 952# incompatible with -fomit-frame-pointer with current GCC, so we don't use 953# -fomit-frame-pointer with FUNCTION_TRACER. 954# In the Rust target specification, "frame-pointer" is set explicitly 955# to "may-omit". 956ifndef CONFIG_FUNCTION_TRACER 957KBUILD_CFLAGS += -fomit-frame-pointer 958endif 959endif 960 961# Initialize all stack variables with a 0xAA pattern. 962ifdef CONFIG_INIT_STACK_ALL_PATTERN 963KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 964endif 965 966# Initialize all stack variables with a zero value. 967ifdef CONFIG_INIT_STACK_ALL_ZERO 968KBUILD_CFLAGS += -ftrivial-auto-var-init=zero 969ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 970# https://github.com/llvm/llvm-project/issues/44842 971CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 972export CC_AUTO_VAR_INIT_ZERO_ENABLER 973KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) 974endif 975endif 976 977ifdef CONFIG_CC_IS_CLANG 978ifdef CONFIG_CC_HAS_COUNTED_BY_PTR 979KBUILD_CFLAGS += -fexperimental-late-parse-attributes 980endif 981endif 982 983# Explicitly clear padding bits during variable initialization 984KBUILD_CFLAGS += $(call cc-option,-fzero-init-padding-bits=all) 985 986# While VLAs have been removed, GCC produces unreachable stack probes 987# for the randomize_kstack_offset feature. Disable it for all compilers. 988KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 989 990# Get details on warnings generated due to GCC value tracking. 991KBUILD_CFLAGS += $(call cc-option, -fdiagnostics-show-context=2) 992 993# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 994ifdef CONFIG_ZERO_CALL_USED_REGS 995KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 996endif 997 998ifdef CONFIG_FUNCTION_TRACER 999ifdef CONFIG_FTRACE_MCOUNT_USE_CC 1000 CC_FLAGS_FTRACE += -mrecord-mcount 1001 ifdef CONFIG_HAVE_NOP_MCOUNT 1002 ifeq ($(call cc-option-yn, -mnop-mcount),y) 1003 CC_FLAGS_FTRACE += -mnop-mcount 1004 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 1005 endif 1006 endif 1007endif 1008ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 1009 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT 1010 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 1011 endif 1012endif 1013ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 1014 ifdef CONFIG_HAVE_C_RECORDMCOUNT 1015 BUILD_C_RECORDMCOUNT := y 1016 export BUILD_C_RECORDMCOUNT 1017 endif 1018endif 1019ifdef CONFIG_HAVE_FENTRY 1020 # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 1021 ifeq ($(call cc-option-yn, -mfentry),y) 1022 CC_FLAGS_FTRACE += -mfentry 1023 CC_FLAGS_USING += -DCC_USING_FENTRY 1024 endif 1025endif 1026export CC_FLAGS_FTRACE 1027KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 1028KBUILD_AFLAGS += $(CC_FLAGS_USING) 1029endif 1030 1031# We trigger additional mismatches with less inlining 1032ifdef CONFIG_DEBUG_SECTION_MISMATCH 1033KBUILD_CFLAGS += -fno-inline-functions-called-once 1034endif 1035 1036# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). 1037ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 1038KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 1039KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y 1040LDFLAGS_vmlinux += --gc-sections 1041endif 1042 1043ifdef CONFIG_SHADOW_CALL_STACK 1044ifndef CONFIG_DYNAMIC_SCS 1045CC_FLAGS_SCS := -fsanitize=shadow-call-stack 1046KBUILD_CFLAGS += $(CC_FLAGS_SCS) 1047KBUILD_RUSTFLAGS += -Zsanitizer=shadow-call-stack 1048endif 1049export CC_FLAGS_SCS 1050endif 1051 1052ifdef CONFIG_LTO_CLANG 1053ifdef CONFIG_LTO_CLANG_THIN 1054CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 1055else 1056CC_FLAGS_LTO := -flto 1057endif 1058CC_FLAGS_LTO += -fvisibility=hidden 1059 1060# Limit inlining across translation units to reduce binary size 1061KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 1062endif 1063 1064ifdef CONFIG_LTO 1065KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 1066KBUILD_AFLAGS += -fno-lto 1067export CC_FLAGS_LTO 1068endif 1069 1070ifdef CONFIG_CFI 1071CC_FLAGS_CFI := -fsanitize=kcfi 1072ifdef CONFIG_CFI_ICALL_NORMALIZE_INTEGERS 1073 CC_FLAGS_CFI += -fsanitize-cfi-icall-experimental-normalize-integers 1074endif 1075ifdef CONFIG_FINEIBT_BHI 1076 CC_FLAGS_CFI += -fsanitize-kcfi-arity 1077endif 1078ifdef CONFIG_RUST 1079 # Always pass -Zsanitizer-cfi-normalize-integers as CONFIG_RUST selects 1080 # CONFIG_CFI_ICALL_NORMALIZE_INTEGERS. 1081 RUSTC_FLAGS_CFI := -Zsanitizer=kcfi -Zsanitizer-cfi-normalize-integers 1082 KBUILD_RUSTFLAGS += $(RUSTC_FLAGS_CFI) 1083 export RUSTC_FLAGS_CFI 1084endif 1085KBUILD_CFLAGS += $(CC_FLAGS_CFI) 1086export CC_FLAGS_CFI 1087endif 1088 1089# Architectures can define flags to add/remove for floating-point support 1090CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UNIT 1091export CC_FLAGS_FPU 1092export CC_FLAGS_NO_FPU 1093 1094ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) 1095# Set the minimal function alignment. Use the newer GCC option 1096# -fmin-function-alignment if it is available, or fall back to -falign-funtions. 1097# See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNMENT. 1098ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT 1099KBUILD_CFLAGS += -fmin-function-alignment=$(CONFIG_FUNCTION_ALIGNMENT) 1100else 1101KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) 1102endif 1103endif 1104 1105# arch Makefile may override CC so keep this after arch Makefile is included 1106NOSTDINC_FLAGS += -nostdinc 1107 1108# To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE, 1109# the kernel uses only C99 flexible arrays for dynamically sized trailing 1110# arrays. Enforce this for everything that may examine structure sizes and 1111# perform bounds checking. 1112KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3) 1113 1114# Allow including a tagged struct or union anonymously in another struct/union. 1115KBUILD_CFLAGS += -fms-extensions 1116 1117# disable invalid "can't wrap" optimizations for signed / pointers 1118KBUILD_CFLAGS += -fno-strict-overflow 1119 1120# Make sure -fstack-check isn't enabled (like gentoo apparently did) 1121KBUILD_CFLAGS += -fno-stack-check 1122 1123# conserve stack if available 1124ifdef CONFIG_CC_IS_GCC 1125KBUILD_CFLAGS += -fconserve-stack 1126endif 1127 1128# Ensure compilers do not transform certain loops into calls to wcslen() 1129KBUILD_CFLAGS += -fno-builtin-wcslen 1130 1131# change __FILE__ to the relative path to the source directory 1132ifdef building_out_of_srctree 1133KBUILD_CPPFLAGS += -fmacro-prefix-map=$(srcroot)/= 1134ifeq ($(call rustc-option-yn, --remap-path-scope=macro),y) 1135KBUILD_RUSTFLAGS += --remap-path-prefix=$(srcroot)/= --remap-path-scope=macro 1136endif 1137endif 1138 1139# include additional Makefiles when needed 1140include-y := scripts/Makefile.warn 1141include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1142include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Makefile.btf 1143include-$(CONFIG_KASAN) += scripts/Makefile.kasan 1144include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1145include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan 1146include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1147include-$(CONFIG_KCOV) += scripts/Makefile.kcov 1148include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1149include-$(CONFIG_KSTACK_ERASE) += scripts/Makefile.kstack_erase 1150include-$(CONFIG_AUTOFDO_CLANG) += scripts/Makefile.autofdo 1151include-$(CONFIG_PROPELLER_CLANG) += scripts/Makefile.propeller 1152include-$(CONFIG_WARN_CONTEXT_ANALYSIS) += scripts/Makefile.context-analysis 1153include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1154 1155include $(addprefix $(srctree)/, $(include-y)) 1156 1157# scripts/Makefile.gcc-plugins is intentionally included last. 1158# Do not add $(call cc-option,...) below this line. When you build the kernel 1159# from the clean source tree, the GCC plugins do not exist at this point. 1160 1161# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments 1162KBUILD_CPPFLAGS += $(KCPPFLAGS) 1163KBUILD_AFLAGS += $(KAFLAGS) 1164KBUILD_CFLAGS += $(KCFLAGS) 1165KBUILD_RUSTFLAGS += $(KRUSTFLAGS) 1166 1167KBUILD_LDFLAGS_MODULE += --build-id=sha1 1168LDFLAGS_vmlinux += --build-id=sha1 1169 1170KBUILD_LDFLAGS += -z noexecstack 1171ifeq ($(CONFIG_LD_IS_BFD),y) 1172KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 1173endif 1174 1175ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1176LDFLAGS_vmlinux += -X 1177endif 1178 1179ifeq ($(CONFIG_RELR),y) 1180# ld.lld before 15 did not support -z pack-relative-relocs. 1181LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) 1182endif 1183 1184# We never want expected sections to be placed heuristically by the 1185# linker. All sections should be explicitly named in the linker script. 1186ifdef CONFIG_LD_ORPHAN_WARN 1187LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) 1188endif 1189 1190ifneq ($(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS),) 1191LDFLAGS_vmlinux += --emit-relocs --discard-none 1192endif 1193 1194# Align the architecture of userspace programs with the kernel 1195USERFLAGS_FROM_KERNEL := --target=% 1196 1197ifdef CONFIG_ARCH_USERFLAGS 1198KBUILD_USERCFLAGS += $(CONFIG_ARCH_USERFLAGS) 1199KBUILD_USERLDFLAGS += $(CONFIG_ARCH_USERFLAGS) 1200else 1201# If not overridden also inherit the bit size 1202USERFLAGS_FROM_KERNEL += -m32 -m64 1203endif 1204 1205KBUILD_USERCFLAGS += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)) 1206KBUILD_USERLDFLAGS += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)) 1207 1208# userspace programs are linked via the compiler, use the correct linker 1209ifdef CONFIG_CC_IS_CLANG 1210KBUILD_USERLDFLAGS += --ld-path=$(LD) 1211endif 1212 1213# make the checker run with the right architecture 1214CHECKFLAGS += --arch=$(ARCH) 1215 1216# insure the checker run with the right endianness 1217CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 1218 1219# the checker needs the correct machine size 1220CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1221 1222# Validate the checker is available and functional 1223ifneq ($(KBUILD_CHECKSRC), 0) 1224 ifneq ($(shell $(srctree)/scripts/checker-valid.sh $(CHECK) $(CHECKFLAGS)), 1) 1225 $(warning C=$(KBUILD_CHECKSRC) specified, but $(CHECK) is not available or not up to date) 1226 KBUILD_CHECKSRC = 0 1227 endif 1228endif 1229 1230# Default kernel image to build when no specific target is given. 1231# KBUILD_IMAGE may be overruled on the command line or 1232# set in the environment 1233# Also any assignments in arch/$(ARCH)/Makefile take precedence over 1234# this default value 1235export KBUILD_IMAGE ?= vmlinux 1236 1237# 1238# INSTALL_PATH specifies where to place the updated kernel and system map 1239# images. Default is /boot, but you can set it to other values 1240export INSTALL_PATH ?= /boot 1241 1242# 1243# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1244# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1245# an argument if needed. Otherwise it defaults to the kernel install path 1246# 1247export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1248 1249# 1250# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 1251# relocations required by build roots. This is not defined in the 1252# makefile but the argument can be passed to make if needed. 1253# 1254 1255MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 1256export MODLIB 1257 1258PHONY += prepare0 1259 1260ifeq ($(KBUILD_EXTMOD),) 1261 1262build-dir := . 1263clean-dirs := $(sort . Documentation \ 1264 $(patsubst %/,%,$(filter %/, $(core-) \ 1265 $(drivers-) $(libs-)))) 1266 1267export ARCH_CORE := $(core-y) 1268export ARCH_LIB := $(filter %/, $(libs-y)) 1269export ARCH_DRIVERS := $(drivers-y) $(drivers-m) 1270# Externally visible symbols (used by link-vmlinux.sh) 1271 1272KBUILD_VMLINUX_OBJS := built-in.a $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1273KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1274 1275export KBUILD_VMLINUX_LIBS 1276export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1277 1278ifdef CONFIG_TRIM_UNUSED_KSYMS 1279# For the kernel to actually contain only the needed exported symbols, 1280# we have to build modules as well to determine what those symbols are. 1281KBUILD_MODULES := y 1282endif 1283 1284# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 1285quiet_cmd_ar_vmlinux.a = AR $@ 1286 cmd_ar_vmlinux.a = \ 1287 rm -f $@; \ 1288 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ 1289 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) 1290 1291targets += vmlinux.a 1292vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE 1293 $(call if_changed,ar_vmlinux.a) 1294 1295PHONY += vmlinux_o 1296vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 1297 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o 1298 1299vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o 1300 @: 1301 1302PHONY += vmlinux 1303# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, 1304# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is 1305# unrelated; the decompressors just happen to have the same base name, 1306# arch/*/boot/compressed/vmlinux. 1307# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. 1308# 1309# _LDFLAGS_vmlinux is a workaround for the 'private export' bug: 1310# https://savannah.gnu.org/bugs/?61463 1311# For Make > 4.4, the following simple code will work: 1312# vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 1313vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 1314vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) 1315vmlinux: vmlinux.o $(KBUILD_LDS) modpost 1316 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux 1317 1318# The actual objects are generated when descending, 1319# make sure no implicit rule kicks in 1320$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; 1321 1322ifeq ($(origin KERNELRELEASE),file) 1323filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) 1324else 1325filechk_kernel.release = echo $(KERNELRELEASE) 1326endif 1327 1328# Store (new) KERNELRELEASE string in include/config/kernel.release 1329include/config/kernel.release: FORCE 1330 $(call filechk,kernel.release) 1331 1332# Additional helpers built in scripts/ 1333# Carefully list dependencies so we do not try to build scripts twice 1334# in parallel 1335PHONY += scripts 1336scripts: scripts_basic scripts_dtc 1337 $(Q)$(MAKE) $(build)=$(@) 1338 1339# Things we need to do before we recursively start building the kernel 1340# or the modules are listed in "prepare". 1341# A multi level approach is used. prepareN is processed before prepareN-1. 1342# archprepare is used in arch Makefiles and when processed asm symlink, 1343# version.h and scripts_basic is processed / created. 1344 1345PHONY += prepare archprepare 1346 1347archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 1348 asm-generic $(version_h) include/generated/utsrelease.h \ 1349 include/generated/compile.h include/generated/autoconf.h \ 1350 include/generated/rustc_cfg remove-stale-files 1351 1352prepare0: archprepare 1353 $(Q)$(MAKE) $(build)=scripts/mod 1354 $(Q)$(MAKE) $(build)=. prepare 1355 1356# All the preparing.. 1357prepare: prepare0 1358ifdef CONFIG_RUST 1359 +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh 1360 $(Q)$(MAKE) $(build)=rust 1361endif 1362 1363PHONY += remove-stale-files 1364remove-stale-files: 1365 $(Q)$(srctree)/scripts/remove-stale-files 1366 1367# Support for using generic headers in asm-generic 1368asm-generic := -f $(srctree)/scripts/Makefile.asm-headers obj 1369 1370PHONY += asm-generic uapi-asm-generic 1371asm-generic: uapi-asm-generic 1372 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1373 generic=include/asm-generic 1374uapi-asm-generic: 1375 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1376 generic=include/uapi/asm-generic 1377 1378# Generate some files 1379# --------------------------------------------------------------------------- 1380 1381# KERNELRELEASE can change from a few different places, meaning version.h 1382# needs to be updated, so this check is forced on all builds 1383 1384uts_len := 64 1385define filechk_utsrelease.h 1386 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1387 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1388 exit 1; \ 1389 fi; \ 1390 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1391endef 1392 1393define filechk_version.h 1394 if [ $(SUBLEVEL) -gt 255 ]; then \ 1395 echo \#define LINUX_VERSION_CODE $(shell \ 1396 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 1397 else \ 1398 echo \#define LINUX_VERSION_CODE $(shell \ 1399 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1400 fi; \ 1401 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 1402 ((c) > 255 ? 255 : (c)))'; \ 1403 echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 1404 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 1405 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 1406endef 1407 1408$(version_h): private PATCHLEVEL := $(or $(PATCHLEVEL), 0) 1409$(version_h): private SUBLEVEL := $(or $(SUBLEVEL), 0) 1410$(version_h): FORCE 1411 $(call filechk,version.h) 1412 1413include/generated/utsrelease.h: include/config/kernel.release FORCE 1414 $(call filechk,utsrelease.h) 1415 1416filechk_compile.h = $(srctree)/scripts/mkcompile_h \ 1417 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" 1418 1419include/generated/compile.h: FORCE 1420 $(call filechk,compile.h) 1421 1422PHONY += headerdep 1423headerdep: 1424 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1425 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1426 1427# --------------------------------------------------------------------------- 1428# Kernel headers 1429 1430#Default location for installed headers 1431export INSTALL_HDR_PATH = $(objtree)/usr 1432 1433quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1434 cmd_headers_install = \ 1435 mkdir -p $(INSTALL_HDR_PATH); \ 1436 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1437 usr/include $(INSTALL_HDR_PATH) 1438 1439PHONY += headers_install 1440headers_install: headers 1441 $(call cmd,headers_install) 1442 1443PHONY += archheaders archscripts 1444 1445hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1446 1447PHONY += headers 1448headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders 1449ifdef HEADER_ARCH 1450 $(Q)$(MAKE) -f $(srctree)/Makefile HEADER_ARCH= SRCARCH=$(HEADER_ARCH) headers 1451else 1452 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1453 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1454endif 1455 1456ifdef CONFIG_HEADERS_INSTALL 1457prepare: headers 1458endif 1459 1460PHONY += usr_gen_init_cpio 1461usr_gen_init_cpio: scripts_basic 1462 $(Q)$(MAKE) $(build)=usr usr/gen_init_cpio 1463 1464PHONY += scripts_unifdef 1465scripts_unifdef: scripts_basic 1466 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1467 1468PHONY += scripts_gen_packed_field_checks 1469scripts_gen_packed_field_checks: scripts_basic 1470 $(Q)$(MAKE) $(build)=scripts scripts/gen_packed_field_checks 1471 1472# --------------------------------------------------------------------------- 1473# Install 1474 1475# Many distributions have the custom install script, /sbin/installkernel. 1476# If DKMS is installed, 'make install' will eventually recurse back 1477# to this Makefile to build and install external modules. 1478# Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 1479 1480quiet_cmd_install = INSTALL $(INSTALL_PATH) 1481 cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 1482 1483# --------------------------------------------------------------------------- 1484# vDSO install 1485 1486PHONY += vdso_install 1487vdso_install: export INSTALL_FILES = $(vdso-install-y) 1488vdso_install: 1489 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst 1490 1491# --------------------------------------------------------------------------- 1492# Tools 1493 1494ifdef CONFIG_OBJTOOL 1495prepare: tools/objtool 1496endif 1497 1498ifdef CONFIG_BPF 1499ifdef CONFIG_DEBUG_INFO_BTF 1500prepare: tools/bpf/resolve_btfids 1501endif 1502endif 1503 1504# The tools build system is not a part of Kbuild and tends to introduce 1505# its own unique issues. If you need to integrate a new tool into Kbuild, 1506# please consider locating that tool outside the tools/ tree and using the 1507# standard Kbuild "hostprogs" syntax instead of adding a new tools/* entry 1508# here. See Documentation/kbuild/makefiles.rst for details. 1509 1510PHONY += resolve_btfids_clean 1511 1512resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 1513 1514# tools/bpf/resolve_btfids directory might not exist 1515# in output directory, skip its clean in that case 1516resolve_btfids_clean: 1517ifneq ($(wildcard $(resolve_btfids_O)),) 1518 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 1519endif 1520 1521PHONY += objtool_clean objtool_mrproper 1522 1523objtool_O = $(abspath $(objtree))/tools/objtool 1524 1525objtool_clean objtool_mrproper: 1526ifneq ($(wildcard $(objtool_O)),) 1527 $(Q)$(MAKE) -sC $(abs_srctree)/tools/objtool O=$(objtool_O) srctree=$(abs_srctree) $(patsubst objtool_%,%,$@) 1528endif 1529 1530tools/: FORCE 1531 $(Q)mkdir -p $(objtree)/tools 1532 $(Q)$(MAKE) O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1533 1534tools/%: FORCE 1535 $(Q)mkdir -p $(objtree)/tools 1536 $(Q)$(MAKE) O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1537 1538# --------------------------------------------------------------------------- 1539# Kernel selftest 1540 1541PHONY += kselftest 1542kselftest: headers 1543 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1544 1545kselftest-%: headers FORCE 1546 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1547 1548PHONY += kselftest-merge 1549kselftest-merge: 1550 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1551 $(Q)find $(srctree)/tools/testing/selftests -name config -o -name config.$(UTS_MACHINE) | \ 1552 xargs $(srctree)/scripts/kconfig/merge_config.sh -y -m $(objtree)/.config 1553 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1554 1555# --------------------------------------------------------------------------- 1556# Devicetree files 1557 1558ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1559dtstree := arch/$(SRCARCH)/boot/dts 1560endif 1561 1562dtbindingtree := Documentation/devicetree/bindings 1563 1564%.yaml: dtbs_prepare 1565 $(Q)$(MAKE) $(build)=$(dtbindingtree) \ 1566 $(dtbindingtree)/$(patsubst %.yaml,%.example.dtb,$@) dt_binding_check_one 1567 1568ifneq ($(dtstree),) 1569 1570%.dtb: dtbs_prepare 1571 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1572 1573%.dtbo: dtbs_prepare 1574 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1575 1576PHONY += dtbs dtbs_prepare dtbs_install dtbs_check 1577dtbs: dtbs_prepare 1578 $(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1 1579 1580# include/config/kernel.release is actually needed when installing DTBs because 1581# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make 1582# dtbs_install depend on it as dtbs_install may run as root. 1583dtbs_prepare: include/config/kernel.release scripts_dtc 1584 1585ifneq ($(filter dtbs_check %.yaml, $(MAKECMDGOALS)),) 1586export CHECK_DTBS=y 1587endif 1588 1589ifneq ($(CHECK_DTBS),) 1590dtbs_prepare: dt_binding_schemas 1591endif 1592 1593dtbs_check: dtbs 1594 1595dtbs_install: 1596 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.dtbinst obj=$(dtstree) 1597 1598ifdef CONFIG_OF_EARLY_FLATTREE 1599all: dtbs 1600endif 1601 1602ifdef CONFIG_GENERIC_BUILTIN_DTB 1603vmlinux: dtbs 1604endif 1605 1606endif 1607 1608PHONY += scripts_dtc 1609scripts_dtc: scripts_basic 1610 $(Q)$(MAKE) $(build)=scripts/dtc 1611 1612ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1613export CHECK_DTBS=y 1614endif 1615 1616PHONY += dt_binding_check dt_binding_schemas 1617dt_binding_check: dt_binding_schemas scripts_dtc 1618 $(Q)$(MAKE) $(build)=$(dtbindingtree) $@ 1619 1620dt_binding_schemas: 1621 $(Q)$(MAKE) $(build)=$(dtbindingtree) 1622 1623PHONY += dt_compatible_check 1624dt_compatible_check: dt_binding_schemas 1625 $(Q)$(MAKE) $(build)=$(dtbindingtree) $@ 1626 1627# --------------------------------------------------------------------------- 1628# Modules 1629 1630ifdef CONFIG_MODULES 1631 1632# By default, build modules as well 1633 1634all: modules 1635 1636# When we're building modules with modversions, we need to consider 1637# the built-in objects during the descend as well, in order to 1638# make sure the checksums are up to date before we record them. 1639ifdef CONFIG_MODVERSIONS 1640 KBUILD_BUILTIN := y 1641endif 1642 1643# Build modules 1644# 1645 1646# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES 1647# is an exception. 1648ifdef CONFIG_DEBUG_INFO_BTF_MODULES 1649KBUILD_BUILTIN := y 1650modules: vmlinux 1651endif 1652 1653modules: modules_prepare 1654 1655# Target to prepare building external modules 1656modules_prepare: prepare 1657 $(Q)$(MAKE) $(build)=scripts scripts/module.lds 1658 1659endif # CONFIG_MODULES 1660 1661### 1662# Cleaning is done on three levels. 1663# make clean Delete most generated files 1664# Leave enough to build external modules 1665# make mrproper Delete the current configuration, and all generated files 1666# make distclean Remove editor backup files, patch leftover files and the like 1667 1668# Directories & files removed with 'make clean' 1669CLEAN_FILES += vmlinux.symvers modules-only.symvers \ 1670 modules.builtin modules.builtin.modinfo modules.nsdeps \ 1671 modules.builtin.ranges vmlinux.o.map vmlinux.unstripped \ 1672 compile_commands.json rust/test \ 1673 rust-project.json .vmlinux.objs .vmlinux.export.c \ 1674 .builtin-dtbs-list .builtin-dtbs.S 1675 1676# Directories & files removed with 'make mrproper' 1677MRPROPER_FILES += include/config include/generated \ 1678 arch/$(SRCARCH)/include/generated .objdiff \ 1679 debian snap tar-install PKGBUILD pacman \ 1680 .config .config.old .version \ 1681 Module.symvers \ 1682 certs/signing_key.pem \ 1683 certs/x509.genkey \ 1684 vmlinux-gdb.py \ 1685 rpmbuild \ 1686 rust/libmacros.so rust/libmacros.dylib \ 1687 rust/libpin_init_internal.so rust/libpin_init_internal.dylib 1688 1689# clean - Delete most, but leave enough to build external modules 1690# 1691clean: private rm-files := $(CLEAN_FILES) 1692 1693PHONY += archclean vmlinuxclean 1694 1695vmlinuxclean: 1696 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1697 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1698 1699clean: archclean vmlinuxclean resolve_btfids_clean objtool_clean 1700 1701# mrproper - Delete all generated files, including .config 1702# 1703mrproper: private rm-files := $(MRPROPER_FILES) 1704mrproper-dirs := $(addprefix _mrproper_,scripts) 1705 1706PHONY += $(mrproper-dirs) mrproper 1707$(mrproper-dirs): 1708 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1709 1710mrproper: clean objtool_mrproper $(mrproper-dirs) 1711 $(call cmd,rmfiles) 1712 @find . $(RCS_FIND_IGNORE) \ 1713 \( -name '*.rmeta' \) \ 1714 -type f -print | xargs rm -f 1715 1716# distclean 1717# 1718PHONY += distclean 1719 1720distclean: mrproper 1721 @find . $(RCS_FIND_IGNORE) \ 1722 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1723 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1724 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 1725 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 1726 -type f -print | xargs rm -f 1727 1728 1729# Packaging of the kernel to various formats 1730# --------------------------------------------------------------------------- 1731 1732modules-cpio-pkg: usr_gen_init_cpio 1733 1734%src-pkg: FORCE 1735 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1736%pkg: include/config/kernel.release FORCE 1737 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1738 1739# Brief documentation of the typical targets used 1740# --------------------------------------------------------------------------- 1741 1742boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1743boards := $(sort $(notdir $(boards))) 1744board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1745board-dirs := $(sort $(notdir $(board-dirs:/=))) 1746 1747PHONY += help 1748help: 1749 @echo 'Cleaning targets:' 1750 @echo ' clean - Remove most generated files but keep the config and' 1751 @echo ' enough build support to build external modules' 1752 @echo ' mrproper - Remove all generated files + config + various backup files' 1753 @echo ' distclean - mrproper + remove editor backup and patch files' 1754 @echo '' 1755 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1756 @echo '' 1757 @echo 'Other generic targets:' 1758 @echo ' all - Build all targets marked with [*]' 1759 @echo '* vmlinux - Build the bare kernel' 1760 @echo '* modules - Build all modules' 1761 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1762 @echo ' vdso_install - Install unstripped vdso to INSTALL_MOD_PATH (default: /)' 1763 @echo ' dir/ - Build all files in dir and below' 1764 @echo ' dir/file.[ois] - Build specified target only' 1765 @echo ' dir/file.ll - Build the LLVM assembly file' 1766 @echo ' (requires compiler support for LLVM assembly generation)' 1767 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1768 @echo ' (requires a recent binutils and recent build (System.map))' 1769 @echo ' dir/file.ko - Build module including final link' 1770 @echo ' modules_prepare - Set up for building external modules' 1771 @echo ' tags/TAGS - Generate tags file for editors' 1772 @echo ' cscope - Generate cscope index' 1773 @echo ' gtags - Generate GNU GLOBAL index' 1774 @echo ' kernelrelease - Output the release version string (use with make -s)' 1775 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1776 @echo ' image_name - Output the image name (use with make -s)' 1777 @echo ' headers - Build ready-to-install UAPI headers in usr/include' 1778 @echo ' headers_install - Install sanitised kernel UAPI headers to INSTALL_HDR_PATH'; \ 1779 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1780 echo '' 1781 @echo 'Static analysers:' 1782 @echo ' checkstack - Generate a list of stack hogs and consider all functions' 1783 @echo ' with a stack size larger than MINSTACKSIZE (default: 100)' 1784 @echo ' versioncheck - Sanity check on version.h usage' 1785 @echo ' includecheck - Check for duplicate included header files' 1786 @echo ' headerdep - Detect inclusion cycles in headers' 1787 @echo ' coccicheck - Check with Coccinelle' 1788 @echo ' clang-analyzer - Check with clang static analyzer' 1789 @echo ' clang-tidy - Check with clang-tidy' 1790 @echo '' 1791 @echo 'Tools:' 1792 @echo ' nsdeps - Generate missing symbol namespace dependencies' 1793 @echo '' 1794 @echo 'Kernel selftest:' 1795 @echo ' kselftest - Build and run kernel selftest' 1796 @echo ' Build, install, and boot kernel before' 1797 @echo ' running kselftest on it' 1798 @echo ' Run as root for full coverage' 1799 @echo ' kselftest-all - Build kernel selftest' 1800 @echo ' kselftest-install - Build and install kernel selftest' 1801 @echo ' kselftest-clean - Remove all generated kselftest files' 1802 @echo ' kselftest-merge - Merge all the config dependencies of' 1803 @echo ' kselftest to existing .config.' 1804 @echo '' 1805 @echo 'Rust targets:' 1806 @echo ' rustavailable - Checks whether the Rust toolchain is' 1807 @echo ' available and, if not, explains why.' 1808 @echo ' rustfmt - Reformat all the Rust code in the kernel' 1809 @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' 1810 @echo ' is formatted, printing a diff otherwise.' 1811 @echo ' rustdoc - Generate Rust documentation' 1812 @echo ' (requires kernel .config)' 1813 @echo ' rusttest - Runs the Rust tests' 1814 @echo ' (requires kernel .config; downloads external repos)' 1815 @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' 1816 @echo ' (requires kernel .config)' 1817 @echo ' dir/file.[os] - Build specified target only' 1818 @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' 1819 @echo ' Run with RUSTFMT=n to skip reformatting if needed.' 1820 @echo ' The output is not intended to be compilable.' 1821 @echo ' dir/file.ll - Build the LLVM assembly file' 1822 @echo '' 1823 @$(if $(dtstree), \ 1824 echo 'Devicetree:'; \ 1825 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1826 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1827 echo ' dt_binding_check - Validate device tree binding documents and examples'; \ 1828 echo ' dt_binding_schemas - Build processed device tree binding schemas'; \ 1829 echo ' dtbs_check - Validate device tree source files';\ 1830 echo '') 1831 1832 @echo 'Userspace tools targets:' 1833 @echo ' use "make tools/help"' 1834 @echo ' or "cd tools; make help"' 1835 @echo '' 1836 @echo 'Kernel packaging:' 1837 @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1838 @echo '' 1839 @echo 'Documentation targets:' 1840 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1841 @echo '' 1842 @echo 'Architecture-specific targets ($(SRCARCH)):' 1843 @$(or $(archhelp),\ 1844 echo ' No architecture-specific help defined for $(SRCARCH)') 1845 @echo '' 1846 @$(if $(boards), \ 1847 $(foreach b, $(boards), \ 1848 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1849 echo '') 1850 @$(if $(board-dirs), \ 1851 $(foreach b, $(board-dirs), \ 1852 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1853 printf " %-16s - Show all of the above\\n" help-boards; \ 1854 echo '') 1855 1856 @echo ' make V=n [targets] 1: verbose build' 1857 @echo ' 2: give reason for rebuild of target' 1858 @echo ' V=1 and V=2 can be combined with V=12' 1859 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1860 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1861 @echo ' (sparse by default)' 1862 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1863 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1864 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3,c,e where' 1865 @echo ' 1: warnings which may be relevant and do not occur too often' 1866 @echo ' 2: warnings which occur quite often but may still be relevant' 1867 @echo ' 3: more obscure warnings, can most likely be ignored' 1868 @echo ' c: extra checks in the configuration stage (Kconfig)' 1869 @echo ' e: warnings are being treated as errors' 1870 @echo ' Multiple levels can be combined with W=12 or W=123' 1871 @echo ' make UT=1 [targets] Warn if a tracepoint is defined but not used.' 1872 @echo ' [ This will be removed when all current unused tracepoints are eliminated. ]' 1873 @$(if $(dtstree), \ 1874 echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ 1875 echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ 1876 ) 1877 @echo '' 1878 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1879 @echo 'For further info see the ./README file' 1880 1881 1882help-board-dirs := $(addprefix help-,$(board-dirs)) 1883 1884help-boards: $(help-board-dirs) 1885 1886boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1887 1888$(help-board-dirs): help-%: 1889 @echo 'Architecture-specific targets ($(SRCARCH) $*):' 1890 @$(if $(boards-per-dir), \ 1891 $(foreach b, $(boards-per-dir), \ 1892 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1893 echo '') 1894 1895 1896# Documentation targets 1897# --------------------------------------------------------------------------- 1898DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1899 linkcheckdocs dochelp refcheckdocs texinfodocs infodocs mandocs \ 1900 htmldocs-redirects 1901 1902PHONY += $(DOC_TARGETS) 1903$(DOC_TARGETS): 1904 $(Q)$(MAKE) $(build)=Documentation $@ 1905 1906 1907# Rust targets 1908# --------------------------------------------------------------------------- 1909 1910# "Is Rust available?" target 1911PHONY += rustavailable 1912rustavailable: 1913 +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!" 1914 1915# Documentation target 1916# 1917# Using the singular to avoid running afoul of `no-dot-config-targets`. 1918PHONY += rustdoc 1919rustdoc: prepare 1920 $(Q)$(MAKE) $(build)=rust $@ 1921 1922# Testing target 1923PHONY += rusttest 1924rusttest: prepare 1925 $(Q)$(MAKE) $(build)=rust $@ 1926 1927# Formatting targets 1928# 1929# Generated files as well as vendored crates are skipped. 1930PHONY += rustfmt rustfmtcheck 1931 1932rustfmt: 1933 $(Q)find $(srctree) $(RCS_FIND_IGNORE) \ 1934 \( \ 1935 -path $(srctree)/rust/proc-macro2 \ 1936 -o -path $(srctree)/rust/quote \ 1937 -o -path $(srctree)/rust/syn \ 1938 \) -prune -o \ 1939 -type f -a -name '*.rs' -a ! -name '*generated*' -print \ 1940 | xargs $(RUSTFMT) $(rustfmt_flags) 1941 1942rustfmtcheck: rustfmt_flags = --check 1943rustfmtcheck: rustfmt 1944 1945# Misc 1946# --------------------------------------------------------------------------- 1947 1948PHONY += misc-check 1949misc-check: 1950 $(Q)$(srctree)/scripts/misc-check 1951 1952all: misc-check 1953 1954PHONY += scripts_gdb 1955scripts_gdb: prepare0 1956 $(Q)$(MAKE) $(build)=scripts/gdb 1957 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1958 1959ifdef CONFIG_GDB_SCRIPTS 1960all: scripts_gdb 1961endif 1962 1963else # KBUILD_EXTMOD 1964 1965filechk_kernel.release = echo $(KERNELRELEASE) 1966 1967### 1968# External module support. 1969# When building external modules the kernel used as basis is considered 1970# read-only, and no consistency checks are made and the make 1971# system is not used on the basis kernel. If updates are required 1972# in the basis kernel ordinary make commands (without M=...) must be used. 1973 1974# We are always building only modules. 1975KBUILD_BUILTIN := 1976KBUILD_MODULES := y 1977 1978build-dir := . 1979 1980clean-dirs := . 1981clean: private rm-files := Module.symvers modules.nsdeps compile_commands.json 1982 1983PHONY += prepare 1984# now expand this into a simple variable to reduce the cost of shell evaluations 1985prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 1986prepare: PAHOLE_VERSION := $(PAHOLE_VERSION) 1987prepare: 1988 @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 1989 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1990 echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 1991 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 1992 fi 1993 @if [ "$(PAHOLE_VERSION)" != "$(CONFIG_PAHOLE_VERSION)" ]; then \ 1994 echo >&2 "warning: pahole version differs from the one used to build the kernel"; \ 1995 echo >&2 " The kernel was built with: $(CONFIG_PAHOLE_VERSION)"; \ 1996 echo >&2 " You are using: $(PAHOLE_VERSION)"; \ 1997 fi 1998 1999PHONY += help 2000help: 2001 @echo ' Building external modules.' 2002 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 2003 @echo '' 2004 @echo ' modules - default target, build the module(s)' 2005 @echo ' modules_install - install the module' 2006 @echo ' clean - remove generated files in module directory only' 2007 @echo ' rust-analyzer - generate rust-project.json rust-analyzer support file' 2008 @echo '' 2009 2010ifndef CONFIG_MODULES 2011modules modules_install: __external_modules_error 2012__external_modules_error: 2013 @echo >&2 '***' 2014 @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' 2015 @echo >&2 '*** You cannot build or install external modules.' 2016 @echo >&2 '***' 2017 @false 2018endif 2019 2020endif # KBUILD_EXTMOD 2021 2022# --------------------------------------------------------------------------- 2023# Modules 2024 2025PHONY += modules modules_install modules_sign modules_prepare 2026 2027modules_install: 2028 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \ 2029 sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y) 2030 2031ifeq ($(CONFIG_MODULE_SIG),y) 2032# modules_sign is a subset of modules_install. 2033# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 2034modules_sign: modules_install 2035 @: 2036else 2037modules_sign: 2038 @echo >&2 '***' 2039 @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.' 2040 @echo >&2 '***' 2041 @false 2042endif 2043 2044ifdef CONFIG_MODULES 2045 2046modules.order: $(build-dir) 2047 @: 2048 2049# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. 2050# This is solely useful to speed up test compiles. 2051modules: modpost 2052ifneq ($(KBUILD_MODPOST_NOFINAL),1) 2053 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 2054endif 2055 2056PHONY += modules_check 2057modules_check: modules.order 2058 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 2059 2060else # CONFIG_MODULES 2061 2062modules: 2063 @: 2064 2065KBUILD_MODULES := 2066 2067endif # CONFIG_MODULES 2068 2069PHONY += modpost 2070modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ 2071 $(if $(KBUILD_MODULES), modules_check) 2072 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 2073 2074# Single targets 2075# --------------------------------------------------------------------------- 2076# To build individual files in subdirectories, you can do like this: 2077# 2078# make foo/bar/baz.s 2079# 2080# The supported suffixes for single-target are listed in 'single-targets' 2081# 2082# To build only under specific subdirectories, you can do like this: 2083# 2084# make foo/bar/baz/ 2085 2086ifdef single-build 2087 2088# .ko is special because modpost is needed 2089single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 2090single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 2091 $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 2092 2093$(single-ko): single_modules 2094 @: 2095$(single-no-ko): $(build-dir) 2096 @: 2097 2098# Remove modules.order when done because it is not the real one. 2099PHONY += single_modules 2100single_modules: $(single-no-ko) modules_prepare 2101 $(Q){ $(foreach m, $(single-ko), echo $(m:%.ko=%.o);) } > modules.order 2102 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 2103ifneq ($(KBUILD_MODPOST_NOFINAL),1) 2104 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 2105endif 2106 $(Q)rm -f modules.order 2107 2108single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) 2109 2110KBUILD_MODULES := y 2111 2112endif 2113 2114prepare: outputmakefile 2115 2116# Preset locale variables to speed up the build process. Limit locale 2117# tweaks to this spot to avoid wrong language settings when running 2118# make menuconfig etc. 2119# Error messages still appears in the original language 2120PHONY += $(build-dir) 2121$(build-dir): prepare 2122 $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) 2123 2124clean-dirs := $(addprefix _clean_, $(clean-dirs)) 2125PHONY += $(clean-dirs) clean 2126$(clean-dirs): 2127 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 2128 2129clean: $(clean-dirs) 2130 $(call cmd,rmfiles) 2131 @find . $(RCS_FIND_IGNORE) \ 2132 \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ 2133 -o -name '*.ko.*' \ 2134 -o -name '*.dtb' -o -name '*.dtbo' \ 2135 -o -name '*.dtb.S' -o -name '*.dtbo.S' \ 2136 -o -name '*.dt.yaml' -o -name 'dtbs-list' \ 2137 -o -name '*.dwo' -o -name '*.lst' \ 2138 -o -name '*.su' -o -name '*.mod' \ 2139 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 2140 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 2141 -o -name '*.asn1.[ch]' \ 2142 -o -name '*.symtypes' -o -name 'modules.order' \ 2143 -o -name '*.c.[012]*.*' \ 2144 -o -name '*.ll' \ 2145 -o -name '*.gcno' \ 2146 \) -type f -print \ 2147 -o -name '.tmp_*' -print \ 2148 | xargs rm -rf 2149 2150# Generate tags for editors 2151# --------------------------------------------------------------------------- 2152quiet_cmd_tags = GEN $@ 2153 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 2154 2155tags TAGS cscope gtags: FORCE 2156 $(call cmd,tags) 2157 2158# Generate rust-project.json (a file that describes the structure of non-Cargo 2159# Rust projects) for rust-analyzer (an implementation of the Language Server 2160# Protocol). 2161PHONY += rust-analyzer 2162rust-analyzer: 2163 +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh 2164ifdef KBUILD_EXTMOD 2165# FIXME: external modules must not descend into a sub-directory of the kernel 2166 $(Q)$(MAKE) $(build)=$(objtree)/rust src=$(srctree)/rust $@ 2167else 2168 $(Q)$(MAKE) $(build)=rust $@ 2169endif 2170 2171# Script to generate missing namespace dependencies 2172# --------------------------------------------------------------------------- 2173 2174PHONY += nsdeps 2175nsdeps: export KBUILD_NSDEPS=1 2176nsdeps: modules 2177 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 2178 2179# Clang Tooling 2180# --------------------------------------------------------------------------- 2181 2182quiet_cmd_gen_compile_commands = GEN $@ 2183 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 2184 2185compile_commands.json: $(srctree)/scripts/clang-tools/gen_compile_commands.py \ 2186 $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ 2187 $(if $(CONFIG_MODULES), modules.order) FORCE 2188 $(call if_changed,gen_compile_commands) 2189 2190targets += compile_commands.json 2191 2192PHONY += clang-tidy clang-analyzer 2193 2194ifdef CONFIG_CC_IS_CLANG 2195quiet_cmd_clang_tools = CHECK $< 2196 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 2197 2198clang-tidy clang-analyzer: compile_commands.json 2199 $(call cmd,clang_tools) 2200else 2201clang-tidy clang-analyzer: 2202 @echo "$@ requires CC=clang" >&2 2203 @false 2204endif 2205 2206# Scripts to check various things for consistency 2207# --------------------------------------------------------------------------- 2208 2209PHONY += includecheck versioncheck coccicheck 2210 2211includecheck: 2212 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2213 -name '*.[hcS]' -type f -print | sort \ 2214 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 2215 2216versioncheck: 2217 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2218 -name '*.[hcS]' -type f -print | sort \ 2219 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 2220 2221coccicheck: 2222 $(Q)$(BASH) $(srctree)/scripts/$@ 2223 2224PHONY += checkstack kernelrelease kernelversion image_name 2225 2226# UML needs a little special treatment here. It wants to use the host 2227# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2228# else wants $(ARCH), including people doing cross-builds, which means 2229# that $(SUBARCH) doesn't work here. 2230ifeq ($(ARCH), um) 2231CHECKSTACK_ARCH := $(SUBARCH) 2232else 2233CHECKSTACK_ARCH := $(ARCH) 2234endif 2235MINSTACKSIZE ?= 100 2236checkstack: 2237 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 2238 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) $(MINSTACKSIZE) 2239 2240kernelrelease: 2241 @$(filechk_kernel.release) 2242 2243kernelversion: 2244 @echo $(KERNELVERSION) 2245 2246image_name: 2247 @echo $(KBUILD_IMAGE) 2248 2249PHONY += run-command 2250run-command: 2251 $(Q)$(KBUILD_RUN_COMMAND) 2252 2253quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 2254 cmd_rmfiles = rm -rf $(rm-files) 2255 2256# read saved command lines for existing targets 2257existing-targets := $(wildcard $(sort $(targets))) 2258 2259-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 2260 2261endif # config-build 2262endif # mixed-build 2263endif # need-sub-make 2264 2265PHONY += FORCE 2266FORCE: 2267 2268# Declare the contents of the PHONY variable as phony. We keep that 2269# information in a variable so we can use it in if_changed and friends. 2270.PHONY: $(PHONY) 2271