1# SPDX-License-Identifier: GPL-2.0 2VERSION = 7 3PATCHLEVEL = 0 4SUBLEVEL = 0 5EXTRAVERSION = -rc1 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 -Dnon_ascii_idents \ 480 -Dunsafe_op_in_unsafe_fn \ 481 -Wmissing_docs \ 482 -Wrust_2018_idioms \ 483 -Wunreachable_pub \ 484 -Wclippy::all \ 485 -Wclippy::as_ptr_cast_mut \ 486 -Wclippy::as_underscore \ 487 -Wclippy::cast_lossless \ 488 -Wclippy::ignored_unit_patterns \ 489 -Wclippy::mut_mut \ 490 -Wclippy::needless_bitwise_bool \ 491 -Aclippy::needless_lifetimes \ 492 -Wclippy::no_mangle_with_rust_abi \ 493 -Wclippy::ptr_as_ptr \ 494 -Wclippy::ptr_cast_constness \ 495 -Wclippy::ref_as_ptr \ 496 -Wclippy::undocumented_unsafe_blocks \ 497 -Wclippy::unnecessary_safety_comment \ 498 -Wclippy::unnecessary_safety_doc \ 499 -Wrustdoc::missing_crate_level_docs \ 500 -Wrustdoc::unescaped_backticks 501 502KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) \ 503 $(HOSTCFLAGS) -I $(srctree)/scripts/include 504KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) \ 505 -I $(srctree)/scripts/include 506KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ 507 -Zallow-features= $(HOSTRUSTFLAGS) 508KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 509KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 510KBUILD_PROCMACROLDFLAGS := $(or $(PROCMACROLDFLAGS),$(KBUILD_HOSTLDFLAGS)) 511 512# Make variables (CC, etc...) 513CPP = $(CC) -E 514ifneq ($(LLVM),) 515CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 516LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 517AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 518NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 519OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 520OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 521READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 522STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 523else 524CC = $(CROSS_COMPILE)gcc 525LD = $(CROSS_COMPILE)ld 526AR = $(CROSS_COMPILE)ar 527NM = $(CROSS_COMPILE)nm 528OBJCOPY = $(CROSS_COMPILE)objcopy 529OBJDUMP = $(CROSS_COMPILE)objdump 530READELF = $(CROSS_COMPILE)readelf 531STRIP = $(CROSS_COMPILE)strip 532endif 533RUSTC = rustc 534RUSTDOC = rustdoc 535RUSTFMT = rustfmt 536CLIPPY_DRIVER = clippy-driver 537BINDGEN = bindgen 538PAHOLE = pahole 539RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 540LEX = flex 541YACC = bison 542AWK = awk 543INSTALLKERNEL := installkernel 544PERL = perl 545PYTHON3 = python3 546CHECK = sparse 547BASH = bash 548KGZIP = gzip 549KBZIP2 = bzip2 550KLZOP = lzop 551LZMA = lzma 552LZ4 = lz4 553XZ = xz 554ZSTD = zstd 555TAR = tar 556 557CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 558 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 559NOSTDINC_FLAGS := 560CFLAGS_MODULE = 561RUSTFLAGS_MODULE = 562AFLAGS_MODULE = 563LDFLAGS_MODULE = 564CFLAGS_KERNEL = 565RUSTFLAGS_KERNEL = 566AFLAGS_KERNEL = 567LDFLAGS_vmlinux = 568 569# Use USERINCLUDE when you must reference the UAPI directories only. 570USERINCLUDE := \ 571 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 572 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 573 -I$(srctree)/include/uapi \ 574 -I$(objtree)/include/generated/uapi \ 575 -include $(srctree)/include/linux/compiler-version.h \ 576 -include $(srctree)/include/linux/kconfig.h 577 578# Use LINUXINCLUDE when you must reference the include/ directory. 579# Needed to be compatible with the O= option 580LINUXINCLUDE := \ 581 -I$(srctree)/arch/$(SRCARCH)/include \ 582 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 583 -I$(srctree)/include \ 584 -I$(objtree)/include \ 585 $(USERINCLUDE) 586 587KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 588 589KBUILD_CFLAGS := 590KBUILD_CFLAGS += -fshort-wchar 591KBUILD_CFLAGS += -funsigned-char 592KBUILD_CFLAGS += -fno-common 593KBUILD_CFLAGS += -fno-PIE 594KBUILD_CFLAGS += -fno-strict-aliasing 595 596KBUILD_CPPFLAGS := -D__KERNEL__ 597KBUILD_RUSTFLAGS := $(rust_common_flags) \ 598 -Cpanic=abort -Cembed-bitcode=n -Clto=n \ 599 -Cforce-unwind-tables=n -Ccodegen-units=1 \ 600 -Csymbol-mangling-version=v0 \ 601 -Crelocation-model=static \ 602 -Zfunction-sections=n \ 603 -Wclippy::float_arithmetic 604 605KBUILD_AFLAGS_KERNEL := 606KBUILD_CFLAGS_KERNEL := 607KBUILD_RUSTFLAGS_KERNEL := 608KBUILD_AFLAGS_MODULE := -DMODULE 609KBUILD_CFLAGS_MODULE := -DMODULE 610KBUILD_RUSTFLAGS_MODULE := --cfg MODULE 611KBUILD_LDFLAGS_MODULE := 612KBUILD_LDFLAGS := 613CLANG_FLAGS := 614 615ifeq ($(KBUILD_CLIPPY),1) 616 RUSTC_OR_CLIPPY_QUIET := CLIPPY 617 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 618else 619 RUSTC_OR_CLIPPY_QUIET := RUSTC 620 RUSTC_OR_CLIPPY = $(RUSTC) 621endif 622 623# Allows the usage of unstable features in stable compilers. 624export RUSTC_BOOTSTRAP := 1 625 626# Allows finding `.clippy.toml` in out-of-srctree builds. 627export CLIPPY_CONF_DIR := $(srctree) 628 629export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 630export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN 631export HOSTRUSTC KBUILD_HOSTRUSTFLAGS 632export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 633export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 634export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD TAR 635export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS KBUILD_PROCMACROLDFLAGS LDFLAGS_MODULE 636export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 637 638export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 639export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 640export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE 641export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 642export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE 643export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL 644 645# Files to ignore in find ... statements 646 647export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 648 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 649 -prune -o 650 651# =========================================================================== 652# Rules shared between *config targets and build targets 653 654# Basic helpers built in scripts/basic/ 655PHONY += scripts_basic 656scripts_basic: 657 $(Q)$(MAKE) $(build)=scripts/basic 658 659PHONY += outputmakefile 660ifdef building_out_of_srctree 661# Before starting out-of-tree build, make sure the source tree is clean. 662# outputmakefile generates a Makefile in the output directory, if using a 663# separate output directory. This allows convenient use of make in the 664# output directory. 665# At the same time when output Makefile generated, generate .gitignore to 666# ignore whole output directory 667 668ifdef KBUILD_EXTMOD 669print_env_for_makefile = \ 670 echo "export KBUILD_OUTPUT = $(objtree)"; \ 671 echo "export KBUILD_EXTMOD = $(realpath $(srcroot))" ; \ 672 echo "export KBUILD_EXTMOD_OUTPUT = $(CURDIR)" 673else 674print_env_for_makefile = \ 675 echo "export KBUILD_OUTPUT = $(CURDIR)" 676endif 677 678filechk_makefile = { \ 679 echo "\# Automatically generated by $(abs_srctree)/Makefile: don't edit"; \ 680 $(print_env_for_makefile); \ 681 echo "include $(abs_srctree)/Makefile"; \ 682 } 683 684$(objtree)/Makefile: FORCE 685 $(call filechk,makefile) 686 687# Prevent $(srcroot)/Makefile from inhibiting the rule to run. 688PHONY += $(objtree)/Makefile 689 690outputmakefile: $(objtree)/Makefile 691ifeq ($(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 $(Q)test -e .gitignore || \ 712 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 713endif 714 715# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 716# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 717# CC_VERSION_TEXT, RUSTC_VERSION_TEXT and PAHOLE_VERSION are referenced from 718# Kconfig (so they need export), and from include/config/auto.conf.cmd to 719# detect the version changes between builds. 720CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) 721RUSTC_VERSION_TEXT = $(subst $(pound),,$(shell $(RUSTC) --version 2>/dev/null)) 722PAHOLE_VERSION = $(shell $(srctree)/scripts/pahole-version.sh $(PAHOLE)) 723 724ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) 725include $(srctree)/scripts/Makefile.clang 726endif 727 728# Include this also for config targets because some architectures need 729# cc-cross-prefix to determine CROSS_COMPILE. 730ifdef need-compiler 731include $(srctree)/scripts/Makefile.compiler 732endif 733 734ifdef config-build 735# =========================================================================== 736# *config targets only - make sure prerequisites are updated, and descend 737# in scripts/kconfig to make the *config target 738 739# Read arch-specific Makefile to set KBUILD_DEFCONFIG as needed. 740# KBUILD_DEFCONFIG may point out an alternative default configuration 741# used for 'make defconfig' 742include $(srctree)/arch/$(SRCARCH)/Makefile 743export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT RUSTC_VERSION_TEXT PAHOLE_VERSION 744 745config: outputmakefile scripts_basic FORCE 746 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 747 748%config: outputmakefile scripts_basic FORCE 749 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 750 751else #!config-build 752# =========================================================================== 753# Build targets only - this includes vmlinux, arch-specific targets, clean 754# targets and others. In general all targets except *config targets. 755 756# If building an external module we do not care about the all: rule 757# but instead __all depend on modules 758PHONY += all 759ifeq ($(KBUILD_EXTMOD),) 760__all: all 761else 762__all: modules 763endif 764 765targets := 766 767# Decide whether to build built-in, modular, or both. 768# Normally, just do built-in. 769 770KBUILD_MODULES := 771KBUILD_BUILTIN := y 772 773# If we have only "make modules", don't compile built-in objects. 774ifeq ($(MAKECMDGOALS),modules) 775 KBUILD_BUILTIN := 776endif 777 778# If we have "make <whatever> modules", compile modules 779# in addition to whatever we do anyway. 780# Just "make" or "make all" shall build modules as well 781 782ifneq ($(filter all modules nsdeps compile_commands.json clang-%,$(MAKECMDGOALS)),) 783 KBUILD_MODULES := y 784endif 785 786ifeq ($(MAKECMDGOALS),) 787 KBUILD_MODULES := y 788endif 789 790export KBUILD_MODULES KBUILD_BUILTIN 791 792ifdef need-config 793include $(objtree)/include/config/auto.conf 794endif 795 796CC_FLAGS_DIALECT := -std=gnu11 797# Allow including a tagged struct or union anonymously in another struct/union. 798CC_FLAGS_DIALECT += $(CONFIG_CC_MS_EXTENSIONS) 799# Clang enables warnings about GNU and Microsoft extensions by default, disable 800# them because this is expected with the above options. 801ifdef CONFIG_CC_IS_CLANG 802CC_FLAGS_DIALECT += -Wno-gnu 803CC_FLAGS_DIALECT += -Wno-microsoft-anon-tag 804endif 805export CC_FLAGS_DIALECT 806KBUILD_CFLAGS += $(CC_FLAGS_DIALECT) 807 808ifeq ($(KBUILD_EXTMOD),) 809# Objects we will link into vmlinux / subdirs we need to visit 810core-y := 811drivers-y := 812libs-y := lib/ 813endif # KBUILD_EXTMOD 814 815# The all: target is the default when no target is given on the 816# command line. 817# This allow a user to issue only 'make' to build a kernel including modules 818# Defaults to vmlinux, but the arch makefile usually adds further targets 819all: vmlinux 820 821CFLAGS_GCOV := -fprofile-arcs -ftest-coverage 822ifdef CONFIG_CC_IS_GCC 823CFLAGS_GCOV += -fno-tree-loop-im 824endif 825export CFLAGS_GCOV 826 827# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 828ifdef CONFIG_FUNCTION_TRACER 829 CC_FLAGS_FTRACE := -pg 830endif 831 832ifdef CONFIG_TRACEPOINTS 833# To check for unused tracepoints (tracepoints that are defined but never 834# called), run with: 835# 836# make UT=1 837# 838# Each unused tracepoints can take up to 5KB of memory in the running kernel. 839# It is best to remove any that are not used. 840# 841# This command line option will be removed when all current unused 842# tracepoints are removed. 843 844ifeq ("$(origin UT)", "command line") 845 WARN_ON_UNUSED_TRACEPOINTS := $(UT) 846endif 847endif # CONFIG_TRACEPOINTS 848 849export WARN_ON_UNUSED_TRACEPOINTS 850 851include $(srctree)/arch/$(SRCARCH)/Makefile 852 853ifdef need-config 854ifdef may-sync-config 855# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 856# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 857# because some architectures define CROSS_COMPILE there. 858include include/config/auto.conf.cmd 859 860$(KCONFIG_CONFIG): 861 @echo >&2 '***' 862 @echo >&2 '*** Configuration file "$@" not found!' 863 @echo >&2 '***' 864 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 865 @echo >&2 '*** "make menuconfig" or "make xconfig").' 866 @echo >&2 '***' 867 @/bin/false 868 869# The actual configuration files used during the build are stored in 870# include/generated/ and include/config/. Update them if .config is newer than 871# include/config/auto.conf (which mirrors .config). 872# 873# This exploits the 'multi-target pattern rule' trick. 874# The syncconfig should be executed only once to make all the targets. 875# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 876# 877# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 878# so you cannot notice that Kconfig is waiting for the user input. 879%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) 880 $(Q)$(kecho) " SYNC $@" 881 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 882else # !may-sync-config 883# External modules and some install targets need include/generated/autoconf.h 884# and include/config/auto.conf but do not care if they are up-to-date. 885# Use auto.conf to show the error message 886 887checked-configs := $(addprefix $(objtree)/, include/generated/autoconf.h include/generated/rustc_cfg include/config/auto.conf) 888missing-configs := $(filter-out $(wildcard $(checked-configs)), $(checked-configs)) 889 890ifdef missing-configs 891PHONY += $(objtree)/include/config/auto.conf 892 893$(objtree)/include/config/auto.conf: 894 @echo >&2 '***' 895 @echo >&2 '*** ERROR: Kernel configuration is invalid. The following files are missing:' 896 @printf >&2 '*** - %s\n' $(missing-configs) 897 @echo >&2 '*** Run "make oldconfig && make prepare" on kernel source to fix it.' 898 @echo >&2 '***' 899 @/bin/false 900endif 901 902endif # may-sync-config 903endif # need-config 904 905KBUILD_CFLAGS += -fno-delete-null-pointer-checks 906 907ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 908KBUILD_CFLAGS += -O2 909KBUILD_RUSTFLAGS += -Copt-level=2 910else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 911KBUILD_CFLAGS += -Os 912KBUILD_RUSTFLAGS += -Copt-level=s 913endif 914 915# Always set `debug-assertions` and `overflow-checks` because their default 916# depends on `opt-level` and `debug-assertions`, respectively. 917KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) 918KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) 919 920# Tell gcc to never replace conditional load with a non-conditional one 921ifdef CONFIG_CC_IS_GCC 922# gcc-10 renamed --param=allow-store-data-races=0 to 923# -fno-allow-store-data-races. 924KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 925KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 926endif 927 928ifdef CONFIG_READABLE_ASM 929# Disable optimizations that make assembler listings hard to read. 930# reorder blocks reorders the control in the function 931# ipa clone creates specialized cloned functions 932# partial inlining inlines only parts of functions 933KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 934endif 935 936stackp-flags-y := -fno-stack-protector 937stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 938stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 939 940KBUILD_CFLAGS += $(stackp-flags-y) 941 942ifdef CONFIG_FRAME_POINTER 943KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 944KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 945else 946# Some targets (ARM with Thumb2, for example), can't be built with frame 947# pointers. For those, we don't have FUNCTION_TRACER automatically 948# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 949# incompatible with -fomit-frame-pointer with current GCC, so we don't use 950# -fomit-frame-pointer with FUNCTION_TRACER. 951# In the Rust target specification, "frame-pointer" is set explicitly 952# to "may-omit". 953ifndef CONFIG_FUNCTION_TRACER 954KBUILD_CFLAGS += -fomit-frame-pointer 955endif 956endif 957 958# Initialize all stack variables with a 0xAA pattern. 959ifdef CONFIG_INIT_STACK_ALL_PATTERN 960KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 961endif 962 963# Initialize all stack variables with a zero value. 964ifdef CONFIG_INIT_STACK_ALL_ZERO 965KBUILD_CFLAGS += -ftrivial-auto-var-init=zero 966ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 967# https://github.com/llvm/llvm-project/issues/44842 968CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 969export CC_AUTO_VAR_INIT_ZERO_ENABLER 970KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) 971endif 972endif 973 974ifdef CONFIG_CC_IS_CLANG 975ifdef CONFIG_CC_HAS_COUNTED_BY_PTR 976KBUILD_CFLAGS += -fexperimental-late-parse-attributes 977endif 978endif 979 980# Explicitly clear padding bits during variable initialization 981KBUILD_CFLAGS += $(call cc-option,-fzero-init-padding-bits=all) 982 983# While VLAs have been removed, GCC produces unreachable stack probes 984# for the randomize_kstack_offset feature. Disable it for all compilers. 985KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 986 987# Get details on warnings generated due to GCC value tracking. 988KBUILD_CFLAGS += $(call cc-option, -fdiagnostics-show-context=2) 989 990# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 991ifdef CONFIG_ZERO_CALL_USED_REGS 992KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 993endif 994 995ifdef CONFIG_FUNCTION_TRACER 996ifdef CONFIG_FTRACE_MCOUNT_USE_CC 997 CC_FLAGS_FTRACE += -mrecord-mcount 998 ifdef CONFIG_HAVE_NOP_MCOUNT 999 ifeq ($(call cc-option-yn, -mnop-mcount),y) 1000 CC_FLAGS_FTRACE += -mnop-mcount 1001 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 1002 endif 1003 endif 1004endif 1005ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 1006 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT 1007 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 1008 endif 1009endif 1010ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 1011 ifdef CONFIG_HAVE_C_RECORDMCOUNT 1012 BUILD_C_RECORDMCOUNT := y 1013 export BUILD_C_RECORDMCOUNT 1014 endif 1015endif 1016ifdef CONFIG_HAVE_FENTRY 1017 # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 1018 ifeq ($(call cc-option-yn, -mfentry),y) 1019 CC_FLAGS_FTRACE += -mfentry 1020 CC_FLAGS_USING += -DCC_USING_FENTRY 1021 endif 1022endif 1023export CC_FLAGS_FTRACE 1024KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 1025KBUILD_AFLAGS += $(CC_FLAGS_USING) 1026endif 1027 1028# We trigger additional mismatches with less inlining 1029ifdef CONFIG_DEBUG_SECTION_MISMATCH 1030KBUILD_CFLAGS += -fno-inline-functions-called-once 1031endif 1032 1033# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). 1034ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 1035KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 1036KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y 1037LDFLAGS_vmlinux += --gc-sections 1038endif 1039 1040ifdef CONFIG_SHADOW_CALL_STACK 1041ifndef CONFIG_DYNAMIC_SCS 1042CC_FLAGS_SCS := -fsanitize=shadow-call-stack 1043KBUILD_CFLAGS += $(CC_FLAGS_SCS) 1044KBUILD_RUSTFLAGS += -Zsanitizer=shadow-call-stack 1045endif 1046export CC_FLAGS_SCS 1047endif 1048 1049ifdef CONFIG_LTO_CLANG 1050ifdef CONFIG_LTO_CLANG_THIN 1051CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 1052KBUILD_LDFLAGS += $(call ld-option,--lto-whole-program-visibility -mllvm -always-rename-promoted-locals=false) 1053else 1054CC_FLAGS_LTO := -flto 1055endif 1056CC_FLAGS_LTO += -fvisibility=hidden 1057 1058# Limit inlining across translation units to reduce binary size 1059KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 1060endif 1061 1062ifdef CONFIG_LTO 1063KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 1064KBUILD_AFLAGS += -fno-lto 1065export CC_FLAGS_LTO 1066endif 1067 1068ifdef CONFIG_CFI 1069CC_FLAGS_CFI := -fsanitize=kcfi 1070ifdef CONFIG_CFI_ICALL_NORMALIZE_INTEGERS 1071 CC_FLAGS_CFI += -fsanitize-cfi-icall-experimental-normalize-integers 1072endif 1073ifdef CONFIG_FINEIBT_BHI 1074 CC_FLAGS_CFI += -fsanitize-kcfi-arity 1075endif 1076ifdef CONFIG_RUST 1077 # Always pass -Zsanitizer-cfi-normalize-integers as CONFIG_RUST selects 1078 # CONFIG_CFI_ICALL_NORMALIZE_INTEGERS. 1079 RUSTC_FLAGS_CFI := -Zsanitizer=kcfi -Zsanitizer-cfi-normalize-integers 1080 KBUILD_RUSTFLAGS += $(RUSTC_FLAGS_CFI) 1081 export RUSTC_FLAGS_CFI 1082endif 1083KBUILD_CFLAGS += $(CC_FLAGS_CFI) 1084export CC_FLAGS_CFI 1085endif 1086 1087# Architectures can define flags to add/remove for floating-point support 1088CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UNIT 1089export CC_FLAGS_FPU 1090export CC_FLAGS_NO_FPU 1091 1092ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) 1093# Set the minimal function alignment. Use the newer GCC option 1094# -fmin-function-alignment if it is available, or fall back to -falign-funtions. 1095# See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNMENT. 1096ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT 1097KBUILD_CFLAGS += -fmin-function-alignment=$(CONFIG_FUNCTION_ALIGNMENT) 1098else 1099KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) 1100endif 1101endif 1102 1103# arch Makefile may override CC so keep this after arch Makefile is included 1104NOSTDINC_FLAGS += -nostdinc 1105 1106# To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE, 1107# the kernel uses only C99 flexible arrays for dynamically sized trailing 1108# arrays. Enforce this for everything that may examine structure sizes and 1109# perform bounds checking. 1110KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3) 1111 1112# disable invalid "can't wrap" optimizations for signed / pointers 1113KBUILD_CFLAGS += -fno-strict-overflow 1114 1115# Make sure -fstack-check isn't enabled (like gentoo apparently did) 1116KBUILD_CFLAGS += -fno-stack-check 1117 1118# conserve stack if available 1119ifdef CONFIG_CC_IS_GCC 1120KBUILD_CFLAGS += -fconserve-stack 1121endif 1122 1123# Ensure compilers do not transform certain loops into calls to wcslen() 1124KBUILD_CFLAGS += -fno-builtin-wcslen 1125 1126# change __FILE__ to the relative path to the source directory 1127ifdef building_out_of_srctree 1128KBUILD_CPPFLAGS += -fmacro-prefix-map=$(srcroot)/= 1129endif 1130 1131# include additional Makefiles when needed 1132include-y := scripts/Makefile.warn 1133include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1134include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Makefile.btf 1135include-$(CONFIG_KASAN) += scripts/Makefile.kasan 1136include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1137include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan 1138include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1139include-$(CONFIG_KCOV) += scripts/Makefile.kcov 1140include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1141include-$(CONFIG_KSTACK_ERASE) += scripts/Makefile.kstack_erase 1142include-$(CONFIG_AUTOFDO_CLANG) += scripts/Makefile.autofdo 1143include-$(CONFIG_PROPELLER_CLANG) += scripts/Makefile.propeller 1144include-$(CONFIG_WARN_CONTEXT_ANALYSIS) += scripts/Makefile.context-analysis 1145include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1146 1147include $(addprefix $(srctree)/, $(include-y)) 1148 1149# scripts/Makefile.gcc-plugins is intentionally included last. 1150# Do not add $(call cc-option,...) below this line. When you build the kernel 1151# from the clean source tree, the GCC plugins do not exist at this point. 1152 1153# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments 1154KBUILD_CPPFLAGS += $(KCPPFLAGS) 1155KBUILD_AFLAGS += $(KAFLAGS) 1156KBUILD_CFLAGS += $(KCFLAGS) 1157KBUILD_RUSTFLAGS += $(KRUSTFLAGS) 1158 1159KBUILD_LDFLAGS_MODULE += --build-id=sha1 1160LDFLAGS_vmlinux += --build-id=sha1 1161 1162KBUILD_LDFLAGS += -z noexecstack 1163ifeq ($(CONFIG_LD_IS_BFD),y) 1164KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 1165endif 1166 1167ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1168LDFLAGS_vmlinux += -X 1169endif 1170 1171ifeq ($(CONFIG_RELR),y) 1172# ld.lld before 15 did not support -z pack-relative-relocs. 1173LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) 1174endif 1175 1176# We never want expected sections to be placed heuristically by the 1177# linker. All sections should be explicitly named in the linker script. 1178ifdef CONFIG_LD_ORPHAN_WARN 1179LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) 1180endif 1181 1182ifneq ($(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS),) 1183LDFLAGS_vmlinux += --emit-relocs --discard-none 1184endif 1185 1186# Align the architecture of userspace programs with the kernel 1187USERFLAGS_FROM_KERNEL := --target=% 1188 1189ifdef CONFIG_ARCH_USERFLAGS 1190KBUILD_USERCFLAGS += $(CONFIG_ARCH_USERFLAGS) 1191KBUILD_USERLDFLAGS += $(CONFIG_ARCH_USERFLAGS) 1192else 1193# If not overridden also inherit the bit size 1194USERFLAGS_FROM_KERNEL += -m32 -m64 1195endif 1196 1197KBUILD_USERCFLAGS += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)) 1198KBUILD_USERLDFLAGS += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)) 1199 1200# userspace programs are linked via the compiler, use the correct linker 1201ifdef CONFIG_CC_IS_CLANG 1202KBUILD_USERLDFLAGS += --ld-path=$(LD) 1203endif 1204 1205# make the checker run with the right architecture 1206CHECKFLAGS += --arch=$(ARCH) 1207 1208# insure the checker run with the right endianness 1209CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 1210 1211# the checker needs the correct machine size 1212CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1213 1214# Validate the checker is available and functional 1215ifneq ($(KBUILD_CHECKSRC), 0) 1216 ifneq ($(shell $(srctree)/scripts/checker-valid.sh $(CHECK) $(CHECKFLAGS)), 1) 1217 $(warning C=$(KBUILD_CHECKSRC) specified, but $(CHECK) is not available or not up to date) 1218 KBUILD_CHECKSRC = 0 1219 endif 1220endif 1221 1222# Default kernel image to build when no specific target is given. 1223# KBUILD_IMAGE may be overruled on the command line or 1224# set in the environment 1225# Also any assignments in arch/$(ARCH)/Makefile take precedence over 1226# this default value 1227export KBUILD_IMAGE ?= vmlinux 1228 1229# 1230# INSTALL_PATH specifies where to place the updated kernel and system map 1231# images. Default is /boot, but you can set it to other values 1232export INSTALL_PATH ?= /boot 1233 1234# 1235# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1236# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1237# an argument if needed. Otherwise it defaults to the kernel install path 1238# 1239export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1240 1241# 1242# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 1243# relocations required by build roots. This is not defined in the 1244# makefile but the argument can be passed to make if needed. 1245# 1246 1247MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 1248export MODLIB 1249 1250PHONY += prepare0 1251 1252ifeq ($(KBUILD_EXTMOD),) 1253 1254build-dir := . 1255clean-dirs := $(sort . Documentation \ 1256 $(patsubst %/,%,$(filter %/, $(core-) \ 1257 $(drivers-) $(libs-)))) 1258 1259export ARCH_CORE := $(core-y) 1260export ARCH_LIB := $(filter %/, $(libs-y)) 1261export ARCH_DRIVERS := $(drivers-y) $(drivers-m) 1262# Externally visible symbols (used by link-vmlinux.sh) 1263 1264KBUILD_VMLINUX_OBJS := built-in.a $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1265KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1266 1267export KBUILD_VMLINUX_LIBS 1268export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1269 1270ifdef CONFIG_TRIM_UNUSED_KSYMS 1271# For the kernel to actually contain only the needed exported symbols, 1272# we have to build modules as well to determine what those symbols are. 1273KBUILD_MODULES := y 1274endif 1275 1276# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 1277quiet_cmd_ar_vmlinux.a = AR $@ 1278 cmd_ar_vmlinux.a = \ 1279 rm -f $@; \ 1280 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ 1281 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) 1282 1283targets += vmlinux.a 1284vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE 1285 $(call if_changed,ar_vmlinux.a) 1286 1287PHONY += vmlinux_o 1288vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 1289 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o 1290 1291vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o 1292 @: 1293 1294PHONY += vmlinux 1295# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, 1296# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is 1297# unrelated; the decompressors just happen to have the same base name, 1298# arch/*/boot/compressed/vmlinux. 1299# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. 1300# 1301# _LDFLAGS_vmlinux is a workaround for the 'private export' bug: 1302# https://savannah.gnu.org/bugs/?61463 1303# For Make > 4.4, the following simple code will work: 1304# vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 1305vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 1306vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) 1307vmlinux: vmlinux.o $(KBUILD_LDS) modpost 1308 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux 1309 1310# The actual objects are generated when descending, 1311# make sure no implicit rule kicks in 1312$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; 1313 1314ifeq ($(origin KERNELRELEASE),file) 1315filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) 1316else 1317filechk_kernel.release = echo $(KERNELRELEASE) 1318endif 1319 1320# Store (new) KERNELRELEASE string in include/config/kernel.release 1321include/config/kernel.release: FORCE 1322 $(call filechk,kernel.release) 1323 1324# Additional helpers built in scripts/ 1325# Carefully list dependencies so we do not try to build scripts twice 1326# in parallel 1327PHONY += scripts 1328scripts: scripts_basic scripts_dtc 1329 $(Q)$(MAKE) $(build)=$(@) 1330 1331# Things we need to do before we recursively start building the kernel 1332# or the modules are listed in "prepare". 1333# A multi level approach is used. prepareN is processed before prepareN-1. 1334# archprepare is used in arch Makefiles and when processed asm symlink, 1335# version.h and scripts_basic is processed / created. 1336 1337PHONY += prepare archprepare 1338 1339archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 1340 asm-generic $(version_h) include/generated/utsrelease.h \ 1341 include/generated/compile.h include/generated/autoconf.h \ 1342 include/generated/rustc_cfg remove-stale-files 1343 1344prepare0: archprepare 1345 $(Q)$(MAKE) $(build)=scripts/mod 1346 $(Q)$(MAKE) $(build)=. prepare 1347 1348# All the preparing.. 1349prepare: prepare0 1350ifdef CONFIG_RUST 1351 +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh 1352 $(Q)$(MAKE) $(build)=rust 1353endif 1354 1355PHONY += remove-stale-files 1356remove-stale-files: 1357 $(Q)$(srctree)/scripts/remove-stale-files 1358 1359# Support for using generic headers in asm-generic 1360asm-generic := -f $(srctree)/scripts/Makefile.asm-headers obj 1361 1362PHONY += asm-generic uapi-asm-generic 1363asm-generic: uapi-asm-generic 1364 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1365 generic=include/asm-generic 1366uapi-asm-generic: 1367 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1368 generic=include/uapi/asm-generic 1369 1370# Generate some files 1371# --------------------------------------------------------------------------- 1372 1373# KERNELRELEASE can change from a few different places, meaning version.h 1374# needs to be updated, so this check is forced on all builds 1375 1376uts_len := 64 1377define filechk_utsrelease.h 1378 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1379 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1380 exit 1; \ 1381 fi; \ 1382 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1383endef 1384 1385define filechk_version.h 1386 if [ $(SUBLEVEL) -gt 255 ]; then \ 1387 echo \#define LINUX_VERSION_CODE $(shell \ 1388 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 1389 else \ 1390 echo \#define LINUX_VERSION_CODE $(shell \ 1391 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1392 fi; \ 1393 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 1394 ((c) > 255 ? 255 : (c)))'; \ 1395 echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 1396 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 1397 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 1398endef 1399 1400$(version_h): private PATCHLEVEL := $(or $(PATCHLEVEL), 0) 1401$(version_h): private SUBLEVEL := $(or $(SUBLEVEL), 0) 1402$(version_h): FORCE 1403 $(call filechk,version.h) 1404 1405include/generated/utsrelease.h: include/config/kernel.release FORCE 1406 $(call filechk,utsrelease.h) 1407 1408filechk_compile.h = $(srctree)/scripts/mkcompile_h \ 1409 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" 1410 1411include/generated/compile.h: FORCE 1412 $(call filechk,compile.h) 1413 1414PHONY += headerdep 1415headerdep: 1416 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1417 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1418 1419# --------------------------------------------------------------------------- 1420# Kernel headers 1421 1422#Default location for installed headers 1423export INSTALL_HDR_PATH = $(objtree)/usr 1424 1425quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1426 cmd_headers_install = \ 1427 mkdir -p $(INSTALL_HDR_PATH); \ 1428 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1429 usr/include $(INSTALL_HDR_PATH) 1430 1431PHONY += headers_install 1432headers_install: headers 1433 $(call cmd,headers_install) 1434 1435PHONY += archheaders archscripts 1436 1437hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1438 1439PHONY += headers 1440headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders 1441ifdef HEADER_ARCH 1442 $(Q)$(MAKE) -f $(srctree)/Makefile HEADER_ARCH= SRCARCH=$(HEADER_ARCH) headers 1443else 1444 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1445 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1446endif 1447 1448ifdef CONFIG_HEADERS_INSTALL 1449prepare: headers 1450endif 1451 1452PHONY += usr_gen_init_cpio 1453usr_gen_init_cpio: scripts_basic 1454 $(Q)$(MAKE) $(build)=usr usr/gen_init_cpio 1455 1456PHONY += scripts_unifdef 1457scripts_unifdef: scripts_basic 1458 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1459 1460PHONY += scripts_gen_packed_field_checks 1461scripts_gen_packed_field_checks: scripts_basic 1462 $(Q)$(MAKE) $(build)=scripts scripts/gen_packed_field_checks 1463 1464# --------------------------------------------------------------------------- 1465# Install 1466 1467# Many distributions have the custom install script, /sbin/installkernel. 1468# If DKMS is installed, 'make install' will eventually recurse back 1469# to this Makefile to build and install external modules. 1470# Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 1471 1472quiet_cmd_install = INSTALL $(INSTALL_PATH) 1473 cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 1474 1475# --------------------------------------------------------------------------- 1476# vDSO install 1477 1478PHONY += vdso_install 1479vdso_install: export INSTALL_FILES = $(vdso-install-y) 1480vdso_install: 1481 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst 1482 1483# --------------------------------------------------------------------------- 1484# Tools 1485 1486ifdef CONFIG_OBJTOOL 1487prepare: tools/objtool 1488endif 1489 1490ifdef CONFIG_BPF 1491ifdef CONFIG_DEBUG_INFO_BTF 1492prepare: tools/bpf/resolve_btfids 1493endif 1494endif 1495 1496# The tools build system is not a part of Kbuild and tends to introduce 1497# its own unique issues. If you need to integrate a new tool into Kbuild, 1498# please consider locating that tool outside the tools/ tree and using the 1499# standard Kbuild "hostprogs" syntax instead of adding a new tools/* entry 1500# here. See Documentation/kbuild/makefiles.rst for details. 1501 1502PHONY += resolve_btfids_clean 1503 1504resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 1505 1506# tools/bpf/resolve_btfids directory might not exist 1507# in output directory, skip its clean in that case 1508resolve_btfids_clean: 1509ifneq ($(wildcard $(resolve_btfids_O)),) 1510 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 1511endif 1512 1513PHONY += objtool_clean 1514 1515objtool_O = $(abspath $(objtree))/tools/objtool 1516 1517objtool_clean: 1518ifneq ($(wildcard $(objtool_O)),) 1519 $(Q)$(MAKE) -sC $(abs_srctree)/tools/objtool O=$(objtool_O) srctree=$(abs_srctree) clean 1520endif 1521 1522tools/: FORCE 1523 $(Q)mkdir -p $(objtree)/tools 1524 $(Q)$(MAKE) O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1525 1526tools/%: FORCE 1527 $(Q)mkdir -p $(objtree)/tools 1528 $(Q)$(MAKE) O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1529 1530# --------------------------------------------------------------------------- 1531# Kernel selftest 1532 1533PHONY += kselftest 1534kselftest: headers 1535 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1536 1537kselftest-%: headers FORCE 1538 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1539 1540PHONY += kselftest-merge 1541kselftest-merge: 1542 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1543 $(Q)find $(srctree)/tools/testing/selftests -name config -o -name config.$(UTS_MACHINE) | \ 1544 xargs $(srctree)/scripts/kconfig/merge_config.sh -y -m $(objtree)/.config 1545 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1546 1547# --------------------------------------------------------------------------- 1548# Devicetree files 1549 1550ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1551dtstree := arch/$(SRCARCH)/boot/dts 1552endif 1553 1554dtbindingtree := Documentation/devicetree/bindings 1555 1556%.yaml: dtbs_prepare 1557 $(Q)$(MAKE) $(build)=$(dtbindingtree) \ 1558 $(dtbindingtree)/$(patsubst %.yaml,%.example.dtb,$@) dt_binding_check_one 1559 1560ifneq ($(dtstree),) 1561 1562%.dtb: dtbs_prepare 1563 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1564 1565%.dtbo: dtbs_prepare 1566 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1567 1568PHONY += dtbs dtbs_prepare dtbs_install dtbs_check 1569dtbs: dtbs_prepare 1570 $(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1 1571 1572# include/config/kernel.release is actually needed when installing DTBs because 1573# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make 1574# dtbs_install depend on it as dtbs_install may run as root. 1575dtbs_prepare: include/config/kernel.release scripts_dtc 1576 1577ifneq ($(filter dtbs_check %.yaml, $(MAKECMDGOALS)),) 1578export CHECK_DTBS=y 1579endif 1580 1581ifneq ($(CHECK_DTBS),) 1582dtbs_prepare: dt_binding_schemas 1583endif 1584 1585dtbs_check: dtbs 1586 1587dtbs_install: 1588 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.dtbinst obj=$(dtstree) 1589 1590ifdef CONFIG_OF_EARLY_FLATTREE 1591all: dtbs 1592endif 1593 1594ifdef CONFIG_GENERIC_BUILTIN_DTB 1595vmlinux: dtbs 1596endif 1597 1598endif 1599 1600PHONY += scripts_dtc 1601scripts_dtc: scripts_basic 1602 $(Q)$(MAKE) $(build)=scripts/dtc 1603 1604ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1605export CHECK_DTBS=y 1606endif 1607 1608PHONY += dt_binding_check dt_binding_schemas 1609dt_binding_check: dt_binding_schemas scripts_dtc 1610 $(Q)$(MAKE) $(build)=$(dtbindingtree) $@ 1611 1612dt_binding_schemas: 1613 $(Q)$(MAKE) $(build)=$(dtbindingtree) 1614 1615PHONY += dt_compatible_check 1616dt_compatible_check: dt_binding_schemas 1617 $(Q)$(MAKE) $(build)=$(dtbindingtree) $@ 1618 1619# --------------------------------------------------------------------------- 1620# Modules 1621 1622ifdef CONFIG_MODULES 1623 1624# By default, build modules as well 1625 1626all: modules 1627 1628# When we're building modules with modversions, we need to consider 1629# the built-in objects during the descend as well, in order to 1630# make sure the checksums are up to date before we record them. 1631ifdef CONFIG_MODVERSIONS 1632 KBUILD_BUILTIN := y 1633endif 1634 1635# Build modules 1636# 1637 1638# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES 1639# is an exception. 1640ifdef CONFIG_DEBUG_INFO_BTF_MODULES 1641KBUILD_BUILTIN := y 1642modules: vmlinux 1643endif 1644 1645modules: modules_prepare 1646 1647# Target to prepare building external modules 1648modules_prepare: prepare 1649 $(Q)$(MAKE) $(build)=scripts scripts/module.lds 1650 1651endif # CONFIG_MODULES 1652 1653### 1654# Cleaning is done on three levels. 1655# make clean Delete most generated files 1656# Leave enough to build external modules 1657# make mrproper Delete the current configuration, and all generated files 1658# make distclean Remove editor backup files, patch leftover files and the like 1659 1660# Directories & files removed with 'make clean' 1661CLEAN_FILES += vmlinux.symvers modules-only.symvers \ 1662 modules.builtin modules.builtin.modinfo modules.nsdeps \ 1663 modules.builtin.ranges vmlinux.o.map vmlinux.unstripped \ 1664 compile_commands.json rust/test \ 1665 rust-project.json .vmlinux.objs .vmlinux.export.c \ 1666 .builtin-dtbs-list .builtin-dtb.S 1667 1668# Directories & files removed with 'make mrproper' 1669MRPROPER_FILES += include/config include/generated \ 1670 arch/$(SRCARCH)/include/generated .objdiff \ 1671 debian snap tar-install PKGBUILD pacman \ 1672 .config .config.old .version \ 1673 Module.symvers \ 1674 certs/signing_key.pem \ 1675 certs/x509.genkey \ 1676 vmlinux-gdb.py \ 1677 rpmbuild \ 1678 rust/libmacros.so rust/libmacros.dylib \ 1679 rust/libpin_init_internal.so rust/libpin_init_internal.dylib 1680 1681# clean - Delete most, but leave enough to build external modules 1682# 1683clean: private rm-files := $(CLEAN_FILES) 1684 1685PHONY += archclean vmlinuxclean 1686 1687vmlinuxclean: 1688 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1689 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1690 1691clean: archclean vmlinuxclean resolve_btfids_clean objtool_clean 1692 1693# mrproper - Delete all generated files, including .config 1694# 1695mrproper: private rm-files := $(MRPROPER_FILES) 1696mrproper-dirs := $(addprefix _mrproper_,scripts) 1697 1698PHONY += $(mrproper-dirs) mrproper 1699$(mrproper-dirs): 1700 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1701 1702mrproper: clean $(mrproper-dirs) 1703 $(call cmd,rmfiles) 1704 @find . $(RCS_FIND_IGNORE) \ 1705 \( -name '*.rmeta' \) \ 1706 -type f -print | xargs rm -f 1707 1708# distclean 1709# 1710PHONY += distclean 1711 1712distclean: mrproper 1713 @find . $(RCS_FIND_IGNORE) \ 1714 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1715 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1716 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 1717 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 1718 -type f -print | xargs rm -f 1719 1720 1721# Packaging of the kernel to various formats 1722# --------------------------------------------------------------------------- 1723 1724modules-cpio-pkg: usr_gen_init_cpio 1725 1726%src-pkg: FORCE 1727 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1728%pkg: include/config/kernel.release FORCE 1729 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1730 1731# Brief documentation of the typical targets used 1732# --------------------------------------------------------------------------- 1733 1734boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1735boards := $(sort $(notdir $(boards))) 1736board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1737board-dirs := $(sort $(notdir $(board-dirs:/=))) 1738 1739PHONY += help 1740help: 1741 @echo 'Cleaning targets:' 1742 @echo ' clean - Remove most generated files but keep the config and' 1743 @echo ' enough build support to build external modules' 1744 @echo ' mrproper - Remove all generated files + config + various backup files' 1745 @echo ' distclean - mrproper + remove editor backup and patch files' 1746 @echo '' 1747 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1748 @echo '' 1749 @echo 'Other generic targets:' 1750 @echo ' all - Build all targets marked with [*]' 1751 @echo '* vmlinux - Build the bare kernel' 1752 @echo '* modules - Build all modules' 1753 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1754 @echo ' vdso_install - Install unstripped vdso to INSTALL_MOD_PATH (default: /)' 1755 @echo ' dir/ - Build all files in dir and below' 1756 @echo ' dir/file.[ois] - Build specified target only' 1757 @echo ' dir/file.ll - Build the LLVM assembly file' 1758 @echo ' (requires compiler support for LLVM assembly generation)' 1759 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1760 @echo ' (requires a recent binutils and recent build (System.map))' 1761 @echo ' dir/file.ko - Build module including final link' 1762 @echo ' modules_prepare - Set up for building external modules' 1763 @echo ' tags/TAGS - Generate tags file for editors' 1764 @echo ' cscope - Generate cscope index' 1765 @echo ' gtags - Generate GNU GLOBAL index' 1766 @echo ' kernelrelease - Output the release version string (use with make -s)' 1767 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1768 @echo ' image_name - Output the image name (use with make -s)' 1769 @echo ' headers - Build ready-to-install UAPI headers in usr/include' 1770 @echo ' headers_install - Install sanitised kernel UAPI headers to INSTALL_HDR_PATH'; \ 1771 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1772 echo '' 1773 @echo 'Static analysers:' 1774 @echo ' checkstack - Generate a list of stack hogs and consider all functions' 1775 @echo ' with a stack size larger than MINSTACKSIZE (default: 100)' 1776 @echo ' versioncheck - Sanity check on version.h usage' 1777 @echo ' includecheck - Check for duplicate included header files' 1778 @echo ' headerdep - Detect inclusion cycles in headers' 1779 @echo ' coccicheck - Check with Coccinelle' 1780 @echo ' clang-analyzer - Check with clang static analyzer' 1781 @echo ' clang-tidy - Check with clang-tidy' 1782 @echo '' 1783 @echo 'Tools:' 1784 @echo ' nsdeps - Generate missing symbol namespace dependencies' 1785 @echo '' 1786 @echo 'Kernel selftest:' 1787 @echo ' kselftest - Build and run kernel selftest' 1788 @echo ' Build, install, and boot kernel before' 1789 @echo ' running kselftest on it' 1790 @echo ' Run as root for full coverage' 1791 @echo ' kselftest-all - Build kernel selftest' 1792 @echo ' kselftest-install - Build and install kernel selftest' 1793 @echo ' kselftest-clean - Remove all generated kselftest files' 1794 @echo ' kselftest-merge - Merge all the config dependencies of' 1795 @echo ' kselftest to existing .config.' 1796 @echo '' 1797 @echo 'Rust targets:' 1798 @echo ' rustavailable - Checks whether the Rust toolchain is' 1799 @echo ' available and, if not, explains why.' 1800 @echo ' rustfmt - Reformat all the Rust code in the kernel' 1801 @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' 1802 @echo ' is formatted, printing a diff otherwise.' 1803 @echo ' rustdoc - Generate Rust documentation' 1804 @echo ' (requires kernel .config)' 1805 @echo ' rusttest - Runs the Rust tests' 1806 @echo ' (requires kernel .config; downloads external repos)' 1807 @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' 1808 @echo ' (requires kernel .config)' 1809 @echo ' dir/file.[os] - Build specified target only' 1810 @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' 1811 @echo ' Run with RUSTFMT=n to skip reformatting if needed.' 1812 @echo ' The output is not intended to be compilable.' 1813 @echo ' dir/file.ll - Build the LLVM assembly file' 1814 @echo '' 1815 @$(if $(dtstree), \ 1816 echo 'Devicetree:'; \ 1817 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1818 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1819 echo ' dt_binding_check - Validate device tree binding documents and examples'; \ 1820 echo ' dt_binding_schemas - Build processed device tree binding schemas'; \ 1821 echo ' dtbs_check - Validate device tree source files';\ 1822 echo '') 1823 1824 @echo 'Userspace tools targets:' 1825 @echo ' use "make tools/help"' 1826 @echo ' or "cd tools; make help"' 1827 @echo '' 1828 @echo 'Kernel packaging:' 1829 @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1830 @echo '' 1831 @echo 'Documentation targets:' 1832 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1833 @echo '' 1834 @echo 'Architecture-specific targets ($(SRCARCH)):' 1835 @$(or $(archhelp),\ 1836 echo ' No architecture-specific help defined for $(SRCARCH)') 1837 @echo '' 1838 @$(if $(boards), \ 1839 $(foreach b, $(boards), \ 1840 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1841 echo '') 1842 @$(if $(board-dirs), \ 1843 $(foreach b, $(board-dirs), \ 1844 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1845 printf " %-16s - Show all of the above\\n" help-boards; \ 1846 echo '') 1847 1848 @echo ' make V=n [targets] 1: verbose build' 1849 @echo ' 2: give reason for rebuild of target' 1850 @echo ' V=1 and V=2 can be combined with V=12' 1851 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1852 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1853 @echo ' (sparse by default)' 1854 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1855 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1856 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3,c,e where' 1857 @echo ' 1: warnings which may be relevant and do not occur too often' 1858 @echo ' 2: warnings which occur quite often but may still be relevant' 1859 @echo ' 3: more obscure warnings, can most likely be ignored' 1860 @echo ' c: extra checks in the configuration stage (Kconfig)' 1861 @echo ' e: warnings are being treated as errors' 1862 @echo ' Multiple levels can be combined with W=12 or W=123' 1863 @echo ' make UT=1 [targets] Warn if a tracepoint is defined but not used.' 1864 @echo ' [ This will be removed when all current unused tracepoints are eliminated. ]' 1865 @$(if $(dtstree), \ 1866 echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ 1867 echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ 1868 ) 1869 @echo '' 1870 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1871 @echo 'For further info see the ./README file' 1872 1873 1874help-board-dirs := $(addprefix help-,$(board-dirs)) 1875 1876help-boards: $(help-board-dirs) 1877 1878boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1879 1880$(help-board-dirs): help-%: 1881 @echo 'Architecture-specific targets ($(SRCARCH) $*):' 1882 @$(if $(boards-per-dir), \ 1883 $(foreach b, $(boards-per-dir), \ 1884 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1885 echo '') 1886 1887 1888# Documentation targets 1889# --------------------------------------------------------------------------- 1890DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1891 linkcheckdocs dochelp refcheckdocs texinfodocs infodocs mandocs \ 1892 htmldocs-redirects 1893 1894PHONY += $(DOC_TARGETS) 1895$(DOC_TARGETS): 1896 $(Q)$(MAKE) $(build)=Documentation $@ 1897 1898 1899# Rust targets 1900# --------------------------------------------------------------------------- 1901 1902# "Is Rust available?" target 1903PHONY += rustavailable 1904rustavailable: 1905 +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!" 1906 1907# Documentation target 1908# 1909# Using the singular to avoid running afoul of `no-dot-config-targets`. 1910PHONY += rustdoc 1911rustdoc: prepare 1912 $(Q)$(MAKE) $(build)=rust $@ 1913 1914# Testing target 1915PHONY += rusttest 1916rusttest: prepare 1917 $(Q)$(MAKE) $(build)=rust $@ 1918 1919# Formatting targets 1920# 1921# Generated files as well as vendored crates are skipped. 1922PHONY += rustfmt rustfmtcheck 1923 1924rustfmt: 1925 $(Q)find $(srctree) $(RCS_FIND_IGNORE) \ 1926 \( \ 1927 -path $(srctree)/rust/proc-macro2 \ 1928 -o -path $(srctree)/rust/quote \ 1929 -o -path $(srctree)/rust/syn \ 1930 \) -prune -o \ 1931 -type f -a -name '*.rs' -a ! -name '*generated*' -print \ 1932 | xargs $(RUSTFMT) $(rustfmt_flags) 1933 1934rustfmtcheck: rustfmt_flags = --check 1935rustfmtcheck: rustfmt 1936 1937# Misc 1938# --------------------------------------------------------------------------- 1939 1940PHONY += misc-check 1941misc-check: 1942 $(Q)$(srctree)/scripts/misc-check 1943 1944all: misc-check 1945 1946PHONY += scripts_gdb 1947scripts_gdb: prepare0 1948 $(Q)$(MAKE) $(build)=scripts/gdb 1949 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1950 1951ifdef CONFIG_GDB_SCRIPTS 1952all: scripts_gdb 1953endif 1954 1955else # KBUILD_EXTMOD 1956 1957filechk_kernel.release = echo $(KERNELRELEASE) 1958 1959### 1960# External module support. 1961# When building external modules the kernel used as basis is considered 1962# read-only, and no consistency checks are made and the make 1963# system is not used on the basis kernel. If updates are required 1964# in the basis kernel ordinary make commands (without M=...) must be used. 1965 1966# We are always building only modules. 1967KBUILD_BUILTIN := 1968KBUILD_MODULES := y 1969 1970build-dir := . 1971 1972clean-dirs := . 1973clean: private rm-files := Module.symvers modules.nsdeps compile_commands.json 1974 1975PHONY += prepare 1976# now expand this into a simple variable to reduce the cost of shell evaluations 1977prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 1978prepare: PAHOLE_VERSION := $(PAHOLE_VERSION) 1979prepare: 1980 @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 1981 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1982 echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 1983 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 1984 fi 1985 @if [ "$(PAHOLE_VERSION)" != "$(CONFIG_PAHOLE_VERSION)" ]; then \ 1986 echo >&2 "warning: pahole version differs from the one used to build the kernel"; \ 1987 echo >&2 " The kernel was built with: $(CONFIG_PAHOLE_VERSION)"; \ 1988 echo >&2 " You are using: $(PAHOLE_VERSION)"; \ 1989 fi 1990 1991PHONY += help 1992help: 1993 @echo ' Building external modules.' 1994 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1995 @echo '' 1996 @echo ' modules - default target, build the module(s)' 1997 @echo ' modules_install - install the module' 1998 @echo ' clean - remove generated files in module directory only' 1999 @echo ' rust-analyzer - generate rust-project.json rust-analyzer support file' 2000 @echo '' 2001 2002ifndef CONFIG_MODULES 2003modules modules_install: __external_modules_error 2004__external_modules_error: 2005 @echo >&2 '***' 2006 @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' 2007 @echo >&2 '*** You cannot build or install external modules.' 2008 @echo >&2 '***' 2009 @false 2010endif 2011 2012endif # KBUILD_EXTMOD 2013 2014# --------------------------------------------------------------------------- 2015# Modules 2016 2017PHONY += modules modules_install modules_sign modules_prepare 2018 2019modules_install: 2020 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \ 2021 sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y) 2022 2023ifeq ($(CONFIG_MODULE_SIG),y) 2024# modules_sign is a subset of modules_install. 2025# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 2026modules_sign: modules_install 2027 @: 2028else 2029modules_sign: 2030 @echo >&2 '***' 2031 @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.' 2032 @echo >&2 '***' 2033 @false 2034endif 2035 2036ifdef CONFIG_MODULES 2037 2038modules.order: $(build-dir) 2039 @: 2040 2041# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. 2042# This is solely useful to speed up test compiles. 2043modules: modpost 2044ifneq ($(KBUILD_MODPOST_NOFINAL),1) 2045 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 2046endif 2047 2048PHONY += modules_check 2049modules_check: modules.order 2050 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 2051 2052else # CONFIG_MODULES 2053 2054modules: 2055 @: 2056 2057KBUILD_MODULES := 2058 2059endif # CONFIG_MODULES 2060 2061PHONY += modpost 2062modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ 2063 $(if $(KBUILD_MODULES), modules_check) 2064 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 2065 2066# Single targets 2067# --------------------------------------------------------------------------- 2068# To build individual files in subdirectories, you can do like this: 2069# 2070# make foo/bar/baz.s 2071# 2072# The supported suffixes for single-target are listed in 'single-targets' 2073# 2074# To build only under specific subdirectories, you can do like this: 2075# 2076# make foo/bar/baz/ 2077 2078ifdef single-build 2079 2080# .ko is special because modpost is needed 2081single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 2082single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 2083 $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 2084 2085$(single-ko): single_modules 2086 @: 2087$(single-no-ko): $(build-dir) 2088 @: 2089 2090# Remove modules.order when done because it is not the real one. 2091PHONY += single_modules 2092single_modules: $(single-no-ko) modules_prepare 2093 $(Q){ $(foreach m, $(single-ko), echo $(m:%.ko=%.o);) } > modules.order 2094 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 2095ifneq ($(KBUILD_MODPOST_NOFINAL),1) 2096 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 2097endif 2098 $(Q)rm -f modules.order 2099 2100single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) 2101 2102KBUILD_MODULES := y 2103 2104endif 2105 2106prepare: outputmakefile 2107 2108# Preset locale variables to speed up the build process. Limit locale 2109# tweaks to this spot to avoid wrong language settings when running 2110# make menuconfig etc. 2111# Error messages still appears in the original language 2112PHONY += $(build-dir) 2113$(build-dir): prepare 2114 $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) 2115 2116clean-dirs := $(addprefix _clean_, $(clean-dirs)) 2117PHONY += $(clean-dirs) clean 2118$(clean-dirs): 2119 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 2120 2121clean: $(clean-dirs) 2122 $(call cmd,rmfiles) 2123 @find . $(RCS_FIND_IGNORE) \ 2124 \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ 2125 -o -name '*.ko.*' \ 2126 -o -name '*.dtb' -o -name '*.dtbo' \ 2127 -o -name '*.dtb.S' -o -name '*.dtbo.S' \ 2128 -o -name '*.dt.yaml' -o -name 'dtbs-list' \ 2129 -o -name '*.dwo' -o -name '*.lst' \ 2130 -o -name '*.su' -o -name '*.mod' \ 2131 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 2132 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 2133 -o -name '*.asn1.[ch]' \ 2134 -o -name '*.symtypes' -o -name 'modules.order' \ 2135 -o -name '*.c.[012]*.*' \ 2136 -o -name '*.ll' \ 2137 -o -name '*.gcno' \ 2138 \) -type f -print \ 2139 -o -name '.tmp_*' -print \ 2140 | xargs rm -rf 2141 2142# Generate tags for editors 2143# --------------------------------------------------------------------------- 2144quiet_cmd_tags = GEN $@ 2145 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 2146 2147tags TAGS cscope gtags: FORCE 2148 $(call cmd,tags) 2149 2150# Generate rust-project.json (a file that describes the structure of non-Cargo 2151# Rust projects) for rust-analyzer (an implementation of the Language Server 2152# Protocol). 2153PHONY += rust-analyzer 2154rust-analyzer: 2155 +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh 2156ifdef KBUILD_EXTMOD 2157# FIXME: external modules must not descend into a sub-directory of the kernel 2158 $(Q)$(MAKE) $(build)=$(objtree)/rust src=$(srctree)/rust $@ 2159else 2160 $(Q)$(MAKE) $(build)=rust $@ 2161endif 2162 2163# Script to generate missing namespace dependencies 2164# --------------------------------------------------------------------------- 2165 2166PHONY += nsdeps 2167nsdeps: export KBUILD_NSDEPS=1 2168nsdeps: modules 2169 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 2170 2171# Clang Tooling 2172# --------------------------------------------------------------------------- 2173 2174quiet_cmd_gen_compile_commands = GEN $@ 2175 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 2176 2177compile_commands.json: $(srctree)/scripts/clang-tools/gen_compile_commands.py \ 2178 $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ 2179 $(if $(CONFIG_MODULES), modules.order) FORCE 2180 $(call if_changed,gen_compile_commands) 2181 2182targets += compile_commands.json 2183 2184PHONY += clang-tidy clang-analyzer 2185 2186ifdef CONFIG_CC_IS_CLANG 2187quiet_cmd_clang_tools = CHECK $< 2188 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 2189 2190clang-tidy clang-analyzer: compile_commands.json 2191 $(call cmd,clang_tools) 2192else 2193clang-tidy clang-analyzer: 2194 @echo "$@ requires CC=clang" >&2 2195 @false 2196endif 2197 2198# Scripts to check various things for consistency 2199# --------------------------------------------------------------------------- 2200 2201PHONY += includecheck versioncheck coccicheck 2202 2203includecheck: 2204 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2205 -name '*.[hcS]' -type f -print | sort \ 2206 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 2207 2208versioncheck: 2209 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2210 -name '*.[hcS]' -type f -print | sort \ 2211 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 2212 2213coccicheck: 2214 $(Q)$(BASH) $(srctree)/scripts/$@ 2215 2216PHONY += checkstack kernelrelease kernelversion image_name 2217 2218# UML needs a little special treatment here. It wants to use the host 2219# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2220# else wants $(ARCH), including people doing cross-builds, which means 2221# that $(SUBARCH) doesn't work here. 2222ifeq ($(ARCH), um) 2223CHECKSTACK_ARCH := $(SUBARCH) 2224else 2225CHECKSTACK_ARCH := $(ARCH) 2226endif 2227MINSTACKSIZE ?= 100 2228checkstack: 2229 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 2230 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) $(MINSTACKSIZE) 2231 2232kernelrelease: 2233 @$(filechk_kernel.release) 2234 2235kernelversion: 2236 @echo $(KERNELVERSION) 2237 2238image_name: 2239 @echo $(KBUILD_IMAGE) 2240 2241PHONY += run-command 2242run-command: 2243 $(Q)$(KBUILD_RUN_COMMAND) 2244 2245quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 2246 cmd_rmfiles = rm -rf $(rm-files) 2247 2248# read saved command lines for existing targets 2249existing-targets := $(wildcard $(sort $(targets))) 2250 2251-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 2252 2253endif # config-build 2254endif # mixed-build 2255endif # need-sub-make 2256 2257PHONY += FORCE 2258FORCE: 2259 2260# Declare the contents of the PHONY variable as phony. We keep that 2261# information in a variable so we can use it in if_changed and friends. 2262.PHONY: $(PHONY) 2263