1# SPDX-License-Identifier: GPL-2.0 2VERSION = 7 3PATCHLEVEL = 0 4SUBLEVEL = 0 5EXTRAVERSION = -rc3 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 -Aclippy::incompatible_msrv \ 490 -Wclippy::mut_mut \ 491 -Wclippy::needless_bitwise_bool \ 492 -Aclippy::needless_lifetimes \ 493 -Wclippy::no_mangle_with_rust_abi \ 494 -Wclippy::ptr_as_ptr \ 495 -Wclippy::ptr_cast_constness \ 496 -Wclippy::ref_as_ptr \ 497 -Wclippy::undocumented_unsafe_blocks \ 498 -Aclippy::uninlined_format_args \ 499 -Wclippy::unnecessary_safety_comment \ 500 -Wclippy::unnecessary_safety_doc \ 501 -Wrustdoc::missing_crate_level_docs \ 502 -Wrustdoc::unescaped_backticks 503 504KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) \ 505 $(HOSTCFLAGS) -I $(srctree)/scripts/include 506KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) \ 507 -I $(srctree)/scripts/include 508KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ 509 -Zallow-features= 510KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 511KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 512KBUILD_PROCMACROLDFLAGS := $(or $(PROCMACROLDFLAGS),$(KBUILD_HOSTLDFLAGS)) 513 514# Make variables (CC, etc...) 515CPP = $(CC) -E 516ifneq ($(LLVM),) 517CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 518LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) 519AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) 520LLVM_LINK = $(LLVM_PREFIX)llvm-link$(LLVM_SUFFIX) 521NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) 522OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) 523OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) 524READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) 525STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) 526else 527CC = $(CROSS_COMPILE)gcc 528LD = $(CROSS_COMPILE)ld 529AR = $(CROSS_COMPILE)ar 530NM = $(CROSS_COMPILE)nm 531OBJCOPY = $(CROSS_COMPILE)objcopy 532OBJDUMP = $(CROSS_COMPILE)objdump 533READELF = $(CROSS_COMPILE)readelf 534STRIP = $(CROSS_COMPILE)strip 535endif 536RUSTC = rustc 537RUSTDOC = rustdoc 538RUSTFMT = rustfmt 539CLIPPY_DRIVER = clippy-driver 540BINDGEN = bindgen 541PAHOLE = pahole 542RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids 543LEX = flex 544YACC = bison 545AWK = awk 546INSTALLKERNEL := installkernel 547PERL = perl 548PYTHON3 = python3 549CHECK = sparse 550BASH = bash 551KGZIP = gzip 552KBZIP2 = bzip2 553KLZOP = lzop 554LZMA = lzma 555LZ4 = lz4 556XZ = xz 557ZSTD = zstd 558TAR = tar 559 560CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 561 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 562NOSTDINC_FLAGS := 563CFLAGS_MODULE = 564RUSTFLAGS_MODULE = 565AFLAGS_MODULE = 566LDFLAGS_MODULE = 567CFLAGS_KERNEL = 568RUSTFLAGS_KERNEL = 569AFLAGS_KERNEL = 570LDFLAGS_vmlinux = 571 572# Use USERINCLUDE when you must reference the UAPI directories only. 573USERINCLUDE := \ 574 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 575 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 576 -I$(srctree)/include/uapi \ 577 -I$(objtree)/include/generated/uapi \ 578 -include $(srctree)/include/linux/compiler-version.h \ 579 -include $(srctree)/include/linux/kconfig.h 580 581# Use LINUXINCLUDE when you must reference the include/ directory. 582# Needed to be compatible with the O= option 583LINUXINCLUDE := \ 584 -I$(srctree)/arch/$(SRCARCH)/include \ 585 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 586 -I$(srctree)/include \ 587 -I$(objtree)/include \ 588 $(USERINCLUDE) 589 590KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 591 592KBUILD_CFLAGS := 593KBUILD_CFLAGS += -std=gnu11 594KBUILD_CFLAGS += -fshort-wchar 595KBUILD_CFLAGS += -funsigned-char 596KBUILD_CFLAGS += -fno-common 597KBUILD_CFLAGS += -fno-PIE 598KBUILD_CFLAGS += -fno-strict-aliasing 599 600KBUILD_CPPFLAGS := -D__KERNEL__ 601KBUILD_RUSTFLAGS := $(rust_common_flags) \ 602 -Cpanic=abort -Cembed-bitcode=n -Clto=n \ 603 -Cforce-unwind-tables=n -Ccodegen-units=1 \ 604 -Csymbol-mangling-version=v0 \ 605 -Crelocation-model=static \ 606 -Zfunction-sections=n \ 607 -Wclippy::float_arithmetic 608 609KBUILD_AFLAGS_KERNEL := 610KBUILD_CFLAGS_KERNEL := 611KBUILD_RUSTFLAGS_KERNEL := 612KBUILD_AFLAGS_MODULE := -DMODULE 613KBUILD_CFLAGS_MODULE := -DMODULE 614KBUILD_RUSTFLAGS_MODULE := --cfg MODULE 615KBUILD_LDFLAGS_MODULE := 616KBUILD_LDFLAGS := 617CLANG_FLAGS := 618 619ifeq ($(KBUILD_CLIPPY),1) 620 RUSTC_OR_CLIPPY_QUIET := CLIPPY 621 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 622else 623 RUSTC_OR_CLIPPY_QUIET := RUSTC 624 RUSTC_OR_CLIPPY = $(RUSTC) 625endif 626 627# Allows the usage of unstable features in stable compilers. 628export RUSTC_BOOTSTRAP := 1 629 630# Allows finding `.clippy.toml` in out-of-srctree builds. 631export CLIPPY_CONF_DIR := $(srctree) 632 633export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG 634export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN LLVM_LINK 635export HOSTRUSTC KBUILD_HOSTRUSTFLAGS 636export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL 637export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 638export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD TAR 639export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS KBUILD_PROCMACROLDFLAGS LDFLAGS_MODULE 640export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 641 642export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 643export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 644export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE 645export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 646export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE 647export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL 648 649# Files to ignore in find ... statements 650 651export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 652 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 653 -prune -o 654 655# =========================================================================== 656# Rules shared between *config targets and build targets 657 658# Basic helpers built in scripts/basic/ 659PHONY += scripts_basic 660scripts_basic: 661 $(Q)$(MAKE) $(build)=scripts/basic 662 663PHONY += outputmakefile 664ifdef building_out_of_srctree 665# Before starting out-of-tree build, make sure the source tree is clean. 666# outputmakefile generates a Makefile in the output directory, if using a 667# separate output directory. This allows convenient use of make in the 668# output directory. 669# At the same time when output Makefile generated, generate .gitignore to 670# ignore whole output directory 671 672ifdef KBUILD_EXTMOD 673print_env_for_makefile = \ 674 echo "export KBUILD_OUTPUT = $(objtree)"; \ 675 echo "export KBUILD_EXTMOD = $(realpath $(srcroot))" ; \ 676 echo "export KBUILD_EXTMOD_OUTPUT = $(CURDIR)" 677else 678print_env_for_makefile = \ 679 echo "export KBUILD_OUTPUT = $(CURDIR)" 680endif 681 682quiet_cmd_makefile = GEN Makefile 683 cmd_makefile = { \ 684 echo "\# Automatically generated by $(abs_srctree)/Makefile: don't edit"; \ 685 $(print_env_for_makefile); \ 686 echo "include $(abs_srctree)/Makefile"; \ 687 } > Makefile 688 689outputmakefile: 690ifeq ($(KBUILD_EXTMOD),) 691 @if [ -f $(srctree)/.config -o \ 692 -d $(srctree)/include/config -o \ 693 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 694 echo >&2 "***"; \ 695 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 696 echo >&2 "*** in $(abs_srctree)";\ 697 echo >&2 "***"; \ 698 false; \ 699 fi 700else 701 @if [ -f $(srcroot)/modules.order ]; then \ 702 echo >&2 "***"; \ 703 echo >&2 "*** The external module source tree is not clean."; \ 704 echo >&2 "*** Please run 'make -C $(abs_srctree) M=$(realpath $(srcroot)) clean'"; \ 705 echo >&2 "***"; \ 706 false; \ 707 fi 708endif 709 $(Q)ln -fsn $(srcroot) source 710 $(call cmd,makefile) 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 $(objtree)/include/config/auto.conf 794endif 795 796ifeq ($(KBUILD_EXTMOD),) 797# Objects we will link into vmlinux / subdirs we need to visit 798core-y := 799drivers-y := 800libs-y := lib/ 801endif # KBUILD_EXTMOD 802 803# The all: target is the default when no target is given on the 804# command line. 805# This allow a user to issue only 'make' to build a kernel including modules 806# Defaults to vmlinux, but the arch makefile usually adds further targets 807all: vmlinux 808 809CFLAGS_GCOV := -fprofile-arcs -ftest-coverage 810ifdef CONFIG_CC_IS_GCC 811CFLAGS_GCOV += -fno-tree-loop-im 812endif 813export CFLAGS_GCOV 814 815# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 816ifdef CONFIG_FUNCTION_TRACER 817 CC_FLAGS_FTRACE := -pg 818endif 819 820ifdef CONFIG_TRACEPOINTS 821# To check for unused tracepoints (tracepoints that are defined but never 822# called), run with: 823# 824# make UT=1 825# 826# Each unused tracepoints can take up to 5KB of memory in the running kernel. 827# It is best to remove any that are not used. 828# 829# This command line option will be removed when all current unused 830# tracepoints are removed. 831 832ifeq ("$(origin UT)", "command line") 833 WARN_ON_UNUSED_TRACEPOINTS := $(UT) 834endif 835endif # CONFIG_TRACEPOINTS 836 837export WARN_ON_UNUSED_TRACEPOINTS 838 839# Per-version Rust flags. These are like `rust_common_flags`, but may 840# depend on the Rust compiler version (e.g. using `rustc-min-version`). 841# 842# `-Aclippy::precedence`: the lint was extended in Rust 1.85.0 to 843# include bitmasking and shift operations. However, because it generated 844# many hits, in Rust 1.86.0 it was split into a new `precedence_bits` 845# lint which is not enabled by default. 846rust_common_flags_per_version := \ 847 $(if $(call rustc-min-version,108600),,-Aclippy::precedence) 848 849rust_common_flags += $(rust_common_flags_per_version) 850KBUILD_HOSTRUSTFLAGS += $(rust_common_flags_per_version) $(HOSTRUSTFLAGS) 851KBUILD_RUSTFLAGS += $(rust_common_flags_per_version) 852 853include $(srctree)/arch/$(SRCARCH)/Makefile 854 855ifdef need-config 856ifdef may-sync-config 857# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 858# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 859# because some architectures define CROSS_COMPILE there. 860include include/config/auto.conf.cmd 861 862$(KCONFIG_CONFIG): 863 @echo >&2 '***' 864 @echo >&2 '*** Configuration file "$@" not found!' 865 @echo >&2 '***' 866 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 867 @echo >&2 '*** "make menuconfig" or "make xconfig").' 868 @echo >&2 '***' 869 @/bin/false 870 871# The actual configuration files used during the build are stored in 872# include/generated/ and include/config/. Update them if .config is newer than 873# include/config/auto.conf (which mirrors .config). 874# 875# This exploits the 'multi-target pattern rule' trick. 876# The syncconfig should be executed only once to make all the targets. 877# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) 878# 879# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, 880# so you cannot notice that Kconfig is waiting for the user input. 881%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) 882 $(Q)$(kecho) " SYNC $@" 883 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 884else # !may-sync-config 885# External modules and some install targets need include/generated/autoconf.h 886# and include/config/auto.conf but do not care if they are up-to-date. 887# Use auto.conf to show the error message 888 889checked-configs := $(addprefix $(objtree)/, include/generated/autoconf.h include/generated/rustc_cfg include/config/auto.conf) 890missing-configs := $(filter-out $(wildcard $(checked-configs)), $(checked-configs)) 891 892ifdef missing-configs 893PHONY += $(objtree)/include/config/auto.conf 894 895$(objtree)/include/config/auto.conf: 896 @echo >&2 '***' 897 @echo >&2 '*** ERROR: Kernel configuration is invalid. The following files are missing:' 898 @printf >&2 '*** - %s\n' $(missing-configs) 899 @echo >&2 '*** Run "make oldconfig && make prepare" on kernel source to fix it.' 900 @echo >&2 '***' 901 @/bin/false 902endif 903 904endif # may-sync-config 905endif # need-config 906 907KBUILD_CFLAGS += -fno-delete-null-pointer-checks 908 909ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 910KBUILD_CFLAGS += -O2 911KBUILD_RUSTFLAGS += -Copt-level=2 912else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 913KBUILD_CFLAGS += -Os 914KBUILD_RUSTFLAGS += -Copt-level=s 915endif 916 917# Always set `debug-assertions` and `overflow-checks` because their default 918# depends on `opt-level` and `debug-assertions`, respectively. 919KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) 920KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) 921 922# Tell gcc to never replace conditional load with a non-conditional one 923ifdef CONFIG_CC_IS_GCC 924# gcc-10 renamed --param=allow-store-data-races=0 to 925# -fno-allow-store-data-races. 926KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 927KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) 928endif 929 930ifdef CONFIG_READABLE_ASM 931# Disable optimizations that make assembler listings hard to read. 932# reorder blocks reorders the control in the function 933# ipa clone creates specialized cloned functions 934# partial inlining inlines only parts of functions 935KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining 936endif 937 938stackp-flags-y := -fno-stack-protector 939stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 940stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 941 942KBUILD_CFLAGS += $(stackp-flags-y) 943 944ifdef CONFIG_FRAME_POINTER 945KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 946KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 947else 948# Some targets (ARM with Thumb2, for example), can't be built with frame 949# pointers. For those, we don't have FUNCTION_TRACER automatically 950# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 951# incompatible with -fomit-frame-pointer with current GCC, so we don't use 952# -fomit-frame-pointer with FUNCTION_TRACER. 953# In the Rust target specification, "frame-pointer" is set explicitly 954# to "may-omit". 955ifndef CONFIG_FUNCTION_TRACER 956KBUILD_CFLAGS += -fomit-frame-pointer 957endif 958endif 959 960# Initialize all stack variables with a 0xAA pattern. 961ifdef CONFIG_INIT_STACK_ALL_PATTERN 962KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 963endif 964 965# Initialize all stack variables with a zero value. 966ifdef CONFIG_INIT_STACK_ALL_ZERO 967KBUILD_CFLAGS += -ftrivial-auto-var-init=zero 968ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 969# https://github.com/llvm/llvm-project/issues/44842 970CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 971export CC_AUTO_VAR_INIT_ZERO_ENABLER 972KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) 973endif 974endif 975 976ifdef CONFIG_CC_IS_CLANG 977ifdef CONFIG_CC_HAS_COUNTED_BY_PTR 978KBUILD_CFLAGS += -fexperimental-late-parse-attributes 979endif 980endif 981 982# Explicitly clear padding bits during variable initialization 983KBUILD_CFLAGS += $(call cc-option,-fzero-init-padding-bits=all) 984 985# While VLAs have been removed, GCC produces unreachable stack probes 986# for the randomize_kstack_offset feature. Disable it for all compilers. 987KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) 988 989# Get details on warnings generated due to GCC value tracking. 990KBUILD_CFLAGS += $(call cc-option, -fdiagnostics-show-context=2) 991 992# Clear used registers at func exit (to reduce data lifetime and ROP gadgets). 993ifdef CONFIG_ZERO_CALL_USED_REGS 994KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr 995endif 996 997ifdef CONFIG_FUNCTION_TRACER 998ifdef CONFIG_FTRACE_MCOUNT_USE_CC 999 CC_FLAGS_FTRACE += -mrecord-mcount 1000 ifdef CONFIG_HAVE_NOP_MCOUNT 1001 ifeq ($(call cc-option-yn, -mnop-mcount),y) 1002 CC_FLAGS_FTRACE += -mnop-mcount 1003 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 1004 endif 1005 endif 1006endif 1007ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 1008 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT 1009 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 1010 endif 1011endif 1012ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 1013 ifdef CONFIG_HAVE_C_RECORDMCOUNT 1014 BUILD_C_RECORDMCOUNT := y 1015 export BUILD_C_RECORDMCOUNT 1016 endif 1017endif 1018ifdef CONFIG_HAVE_FENTRY 1019 # s390-linux-gnu-gcc did not support -mfentry until gcc-9. 1020 ifeq ($(call cc-option-yn, -mfentry),y) 1021 CC_FLAGS_FTRACE += -mfentry 1022 CC_FLAGS_USING += -DCC_USING_FENTRY 1023 endif 1024endif 1025export CC_FLAGS_FTRACE 1026KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 1027KBUILD_AFLAGS += $(CC_FLAGS_USING) 1028endif 1029 1030# We trigger additional mismatches with less inlining 1031ifdef CONFIG_DEBUG_SECTION_MISMATCH 1032KBUILD_CFLAGS += -fno-inline-functions-called-once 1033endif 1034 1035# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). 1036ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 1037KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 1038KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y 1039LDFLAGS_vmlinux += --gc-sections 1040endif 1041 1042ifdef CONFIG_SHADOW_CALL_STACK 1043ifndef CONFIG_DYNAMIC_SCS 1044CC_FLAGS_SCS := -fsanitize=shadow-call-stack 1045KBUILD_CFLAGS += $(CC_FLAGS_SCS) 1046KBUILD_RUSTFLAGS += -Zsanitizer=shadow-call-stack 1047endif 1048export CC_FLAGS_SCS 1049endif 1050 1051ifdef CONFIG_LTO_CLANG 1052ifdef CONFIG_LTO_CLANG_THIN 1053CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 1054else 1055CC_FLAGS_LTO := -flto 1056endif 1057CC_FLAGS_LTO += -fvisibility=hidden 1058 1059# Limit inlining across translation units to reduce binary size 1060KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 1061endif 1062 1063ifdef CONFIG_LTO 1064KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 1065KBUILD_AFLAGS += -fno-lto 1066export CC_FLAGS_LTO 1067endif 1068 1069ifdef CONFIG_CFI 1070CC_FLAGS_CFI := -fsanitize=kcfi 1071ifdef CONFIG_CFI_ICALL_NORMALIZE_INTEGERS 1072 CC_FLAGS_CFI += -fsanitize-cfi-icall-experimental-normalize-integers 1073endif 1074ifdef CONFIG_FINEIBT_BHI 1075 CC_FLAGS_CFI += -fsanitize-kcfi-arity 1076endif 1077ifdef CONFIG_RUST 1078 # Always pass -Zsanitizer-cfi-normalize-integers as CONFIG_RUST selects 1079 # CONFIG_CFI_ICALL_NORMALIZE_INTEGERS. 1080 RUSTC_FLAGS_CFI := -Zsanitizer=kcfi -Zsanitizer-cfi-normalize-integers 1081 KBUILD_RUSTFLAGS += $(RUSTC_FLAGS_CFI) 1082 export RUSTC_FLAGS_CFI 1083endif 1084KBUILD_CFLAGS += $(CC_FLAGS_CFI) 1085export CC_FLAGS_CFI 1086endif 1087 1088# Architectures can define flags to add/remove for floating-point support 1089CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UNIT 1090export CC_FLAGS_FPU 1091export CC_FLAGS_NO_FPU 1092 1093ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) 1094# Set the minimal function alignment. Use the newer GCC option 1095# -fmin-function-alignment if it is available, or fall back to -falign-funtions. 1096# See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNMENT. 1097ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT 1098KBUILD_CFLAGS += -fmin-function-alignment=$(CONFIG_FUNCTION_ALIGNMENT) 1099else 1100KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) 1101endif 1102endif 1103 1104# arch Makefile may override CC so keep this after arch Makefile is included 1105NOSTDINC_FLAGS += -nostdinc 1106 1107# To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE, 1108# the kernel uses only C99 flexible arrays for dynamically sized trailing 1109# arrays. Enforce this for everything that may examine structure sizes and 1110# perform bounds checking. 1111KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3) 1112 1113# Allow including a tagged struct or union anonymously in another struct/union. 1114KBUILD_CFLAGS += -fms-extensions 1115 1116# disable invalid "can't wrap" optimizations for signed / pointers 1117KBUILD_CFLAGS += -fno-strict-overflow 1118 1119# Make sure -fstack-check isn't enabled (like gentoo apparently did) 1120KBUILD_CFLAGS += -fno-stack-check 1121 1122# conserve stack if available 1123ifdef CONFIG_CC_IS_GCC 1124KBUILD_CFLAGS += -fconserve-stack 1125endif 1126 1127# Ensure compilers do not transform certain loops into calls to wcslen() 1128KBUILD_CFLAGS += -fno-builtin-wcslen 1129 1130# change __FILE__ to the relative path to the source directory 1131ifdef building_out_of_srctree 1132KBUILD_CPPFLAGS += -fmacro-prefix-map=$(srcroot)/= 1133endif 1134 1135# include additional Makefiles when needed 1136include-y := scripts/Makefile.warn 1137include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug 1138include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Makefile.btf 1139include-$(CONFIG_KASAN) += scripts/Makefile.kasan 1140include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan 1141include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan 1142include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan 1143include-$(CONFIG_KCOV) += scripts/Makefile.kcov 1144include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct 1145include-$(CONFIG_KSTACK_ERASE) += scripts/Makefile.kstack_erase 1146include-$(CONFIG_AUTOFDO_CLANG) += scripts/Makefile.autofdo 1147include-$(CONFIG_PROPELLER_CLANG) += scripts/Makefile.propeller 1148include-$(CONFIG_WARN_CONTEXT_ANALYSIS) += scripts/Makefile.context-analysis 1149include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins 1150 1151include $(addprefix $(srctree)/, $(include-y)) 1152 1153# scripts/Makefile.gcc-plugins is intentionally included last. 1154# Do not add $(call cc-option,...) below this line. When you build the kernel 1155# from the clean source tree, the GCC plugins do not exist at this point. 1156 1157# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments 1158KBUILD_CPPFLAGS += $(KCPPFLAGS) 1159KBUILD_AFLAGS += $(KAFLAGS) 1160KBUILD_CFLAGS += $(KCFLAGS) 1161KBUILD_RUSTFLAGS += $(KRUSTFLAGS) 1162 1163KBUILD_LDFLAGS_MODULE += --build-id=sha1 1164LDFLAGS_vmlinux += --build-id=sha1 1165 1166KBUILD_LDFLAGS += -z noexecstack 1167ifeq ($(CONFIG_LD_IS_BFD),y) 1168KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) 1169endif 1170 1171ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1172LDFLAGS_vmlinux += -X 1173endif 1174 1175ifeq ($(CONFIG_RELR),y) 1176# ld.lld before 15 did not support -z pack-relative-relocs. 1177LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) 1178endif 1179 1180# We never want expected sections to be placed heuristically by the 1181# linker. All sections should be explicitly named in the linker script. 1182ifdef CONFIG_LD_ORPHAN_WARN 1183LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) 1184endif 1185 1186ifneq ($(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS),) 1187LDFLAGS_vmlinux += --emit-relocs --discard-none 1188endif 1189 1190# Align the architecture of userspace programs with the kernel 1191USERFLAGS_FROM_KERNEL := --target=% 1192 1193ifdef CONFIG_ARCH_USERFLAGS 1194KBUILD_USERCFLAGS += $(CONFIG_ARCH_USERFLAGS) 1195KBUILD_USERLDFLAGS += $(CONFIG_ARCH_USERFLAGS) 1196else 1197# If not overridden also inherit the bit size 1198USERFLAGS_FROM_KERNEL += -m32 -m64 1199endif 1200 1201KBUILD_USERCFLAGS += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)) 1202KBUILD_USERLDFLAGS += $(filter $(USERFLAGS_FROM_KERNEL), $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)) 1203 1204# userspace programs are linked via the compiler, use the correct linker 1205ifdef CONFIG_CC_IS_CLANG 1206KBUILD_USERLDFLAGS += --ld-path=$(LD) 1207endif 1208 1209# make the checker run with the right architecture 1210CHECKFLAGS += --arch=$(ARCH) 1211 1212# insure the checker run with the right endianness 1213CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 1214 1215# the checker needs the correct machine size 1216CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1217 1218# Validate the checker is available and functional 1219ifneq ($(KBUILD_CHECKSRC), 0) 1220 ifneq ($(shell $(srctree)/scripts/checker-valid.sh $(CHECK) $(CHECKFLAGS)), 1) 1221 $(warning C=$(KBUILD_CHECKSRC) specified, but $(CHECK) is not available or not up to date) 1222 KBUILD_CHECKSRC = 0 1223 endif 1224endif 1225 1226# Default kernel image to build when no specific target is given. 1227# KBUILD_IMAGE may be overruled on the command line or 1228# set in the environment 1229# Also any assignments in arch/$(ARCH)/Makefile take precedence over 1230# this default value 1231export KBUILD_IMAGE ?= vmlinux 1232 1233# 1234# INSTALL_PATH specifies where to place the updated kernel and system map 1235# images. Default is /boot, but you can set it to other values 1236export INSTALL_PATH ?= /boot 1237 1238# 1239# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 1240# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 1241# an argument if needed. Otherwise it defaults to the kernel install path 1242# 1243export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 1244 1245# 1246# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 1247# relocations required by build roots. This is not defined in the 1248# makefile but the argument can be passed to make if needed. 1249# 1250 1251MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 1252export MODLIB 1253 1254PHONY += prepare0 1255 1256ifeq ($(KBUILD_EXTMOD),) 1257 1258build-dir := . 1259clean-dirs := $(sort . Documentation \ 1260 $(patsubst %/,%,$(filter %/, $(core-) \ 1261 $(drivers-) $(libs-)))) 1262 1263export ARCH_CORE := $(core-y) 1264export ARCH_LIB := $(filter %/, $(libs-y)) 1265export ARCH_DRIVERS := $(drivers-y) $(drivers-m) 1266# Externally visible symbols (used by link-vmlinux.sh) 1267 1268KBUILD_VMLINUX_OBJS := built-in.a $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) 1269KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) 1270 1271export KBUILD_VMLINUX_LIBS 1272export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1273 1274ifdef CONFIG_TRIM_UNUSED_KSYMS 1275# For the kernel to actually contain only the needed exported symbols, 1276# we have to build modules as well to determine what those symbols are. 1277KBUILD_MODULES := y 1278endif 1279 1280# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 1281quiet_cmd_ar_vmlinux.a = AR $@ 1282 cmd_ar_vmlinux.a = \ 1283 rm -f $@; \ 1284 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ 1285 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) 1286 1287targets += vmlinux.a 1288vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE 1289 $(call if_changed,ar_vmlinux.a) 1290 1291PHONY += vmlinux_o 1292vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 1293 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o 1294 1295vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o 1296 @: 1297 1298PHONY += vmlinux 1299# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, 1300# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is 1301# unrelated; the decompressors just happen to have the same base name, 1302# arch/*/boot/compressed/vmlinux. 1303# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. 1304# 1305# _LDFLAGS_vmlinux is a workaround for the 'private export' bug: 1306# https://savannah.gnu.org/bugs/?61463 1307# For Make > 4.4, the following simple code will work: 1308# vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 1309vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) 1310vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) 1311vmlinux: vmlinux.o $(KBUILD_LDS) modpost 1312 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux 1313 1314# The actual objects are generated when descending, 1315# make sure no implicit rule kicks in 1316$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; 1317 1318ifeq ($(origin KERNELRELEASE),file) 1319filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) 1320else 1321filechk_kernel.release = echo $(KERNELRELEASE) 1322endif 1323 1324# Store (new) KERNELRELEASE string in include/config/kernel.release 1325include/config/kernel.release: FORCE 1326 $(call filechk,kernel.release) 1327 1328# Additional helpers built in scripts/ 1329# Carefully list dependencies so we do not try to build scripts twice 1330# in parallel 1331PHONY += scripts 1332scripts: scripts_basic scripts_dtc 1333 $(Q)$(MAKE) $(build)=$(@) 1334 1335# Things we need to do before we recursively start building the kernel 1336# or the modules are listed in "prepare". 1337# A multi level approach is used. prepareN is processed before prepareN-1. 1338# archprepare is used in arch Makefiles and when processed asm symlink, 1339# version.h and scripts_basic is processed / created. 1340 1341PHONY += prepare archprepare 1342 1343archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 1344 asm-generic $(version_h) include/generated/utsrelease.h \ 1345 include/generated/compile.h include/generated/autoconf.h \ 1346 include/generated/rustc_cfg remove-stale-files 1347 1348prepare0: archprepare 1349 $(Q)$(MAKE) $(build)=scripts/mod 1350 $(Q)$(MAKE) $(build)=. prepare 1351 1352# All the preparing.. 1353prepare: prepare0 1354ifdef CONFIG_RUST 1355 +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh 1356 $(Q)$(MAKE) $(build)=rust 1357endif 1358 1359PHONY += remove-stale-files 1360remove-stale-files: 1361 $(Q)$(srctree)/scripts/remove-stale-files 1362 1363# Support for using generic headers in asm-generic 1364asm-generic := -f $(srctree)/scripts/Makefile.asm-headers obj 1365 1366PHONY += asm-generic uapi-asm-generic 1367asm-generic: uapi-asm-generic 1368 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1369 generic=include/asm-generic 1370uapi-asm-generic: 1371 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1372 generic=include/uapi/asm-generic 1373 1374# Generate some files 1375# --------------------------------------------------------------------------- 1376 1377# KERNELRELEASE can change from a few different places, meaning version.h 1378# needs to be updated, so this check is forced on all builds 1379 1380uts_len := 64 1381define filechk_utsrelease.h 1382 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1383 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1384 exit 1; \ 1385 fi; \ 1386 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1387endef 1388 1389define filechk_version.h 1390 if [ $(SUBLEVEL) -gt 255 ]; then \ 1391 echo \#define LINUX_VERSION_CODE $(shell \ 1392 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ 1393 else \ 1394 echo \#define LINUX_VERSION_CODE $(shell \ 1395 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1396 fi; \ 1397 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ 1398 ((c) > 255 ? 255 : (c)))'; \ 1399 echo \#define LINUX_VERSION_MAJOR $(VERSION); \ 1400 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ 1401 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) 1402endef 1403 1404$(version_h): private PATCHLEVEL := $(or $(PATCHLEVEL), 0) 1405$(version_h): private SUBLEVEL := $(or $(SUBLEVEL), 0) 1406$(version_h): FORCE 1407 $(call filechk,version.h) 1408 1409include/generated/utsrelease.h: include/config/kernel.release FORCE 1410 $(call filechk,utsrelease.h) 1411 1412filechk_compile.h = $(srctree)/scripts/mkcompile_h \ 1413 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" 1414 1415include/generated/compile.h: FORCE 1416 $(call filechk,compile.h) 1417 1418PHONY += headerdep 1419headerdep: 1420 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1421 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1422 1423# --------------------------------------------------------------------------- 1424# Kernel headers 1425 1426#Default location for installed headers 1427export INSTALL_HDR_PATH = $(objtree)/usr 1428 1429quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1430 cmd_headers_install = \ 1431 mkdir -p $(INSTALL_HDR_PATH); \ 1432 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1433 usr/include $(INSTALL_HDR_PATH) 1434 1435PHONY += headers_install 1436headers_install: headers 1437 $(call cmd,headers_install) 1438 1439PHONY += archheaders archscripts 1440 1441hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1442 1443PHONY += headers 1444headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders 1445ifdef HEADER_ARCH 1446 $(Q)$(MAKE) -f $(srctree)/Makefile HEADER_ARCH= SRCARCH=$(HEADER_ARCH) headers 1447else 1448 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1449 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1450endif 1451 1452ifdef CONFIG_HEADERS_INSTALL 1453prepare: headers 1454endif 1455 1456PHONY += usr_gen_init_cpio 1457usr_gen_init_cpio: scripts_basic 1458 $(Q)$(MAKE) $(build)=usr usr/gen_init_cpio 1459 1460PHONY += scripts_unifdef 1461scripts_unifdef: scripts_basic 1462 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1463 1464PHONY += scripts_gen_packed_field_checks 1465scripts_gen_packed_field_checks: scripts_basic 1466 $(Q)$(MAKE) $(build)=scripts scripts/gen_packed_field_checks 1467 1468# --------------------------------------------------------------------------- 1469# Install 1470 1471# Many distributions have the custom install script, /sbin/installkernel. 1472# If DKMS is installed, 'make install' will eventually recurse back 1473# to this Makefile to build and install external modules. 1474# Cancel sub_make_done so that options such as M=, V=, etc. are parsed. 1475 1476quiet_cmd_install = INSTALL $(INSTALL_PATH) 1477 cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh 1478 1479# --------------------------------------------------------------------------- 1480# vDSO install 1481 1482PHONY += vdso_install 1483vdso_install: export INSTALL_FILES = $(vdso-install-y) 1484vdso_install: 1485 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst 1486 1487# --------------------------------------------------------------------------- 1488# Tools 1489 1490ifdef CONFIG_OBJTOOL 1491prepare: tools/objtool 1492endif 1493 1494ifdef CONFIG_BPF 1495ifdef CONFIG_DEBUG_INFO_BTF 1496prepare: tools/bpf/resolve_btfids 1497endif 1498endif 1499 1500# The tools build system is not a part of Kbuild and tends to introduce 1501# its own unique issues. If you need to integrate a new tool into Kbuild, 1502# please consider locating that tool outside the tools/ tree and using the 1503# standard Kbuild "hostprogs" syntax instead of adding a new tools/* entry 1504# here. See Documentation/kbuild/makefiles.rst for details. 1505 1506PHONY += resolve_btfids_clean 1507 1508resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids 1509 1510# tools/bpf/resolve_btfids directory might not exist 1511# in output directory, skip its clean in that case 1512resolve_btfids_clean: 1513ifneq ($(wildcard $(resolve_btfids_O)),) 1514 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean 1515endif 1516 1517PHONY += objtool_clean objtool_mrproper 1518 1519objtool_O = $(abspath $(objtree))/tools/objtool 1520 1521objtool_clean objtool_mrproper: 1522ifneq ($(wildcard $(objtool_O)),) 1523 $(Q)$(MAKE) -sC $(abs_srctree)/tools/objtool O=$(objtool_O) srctree=$(abs_srctree) $(patsubst objtool_%,%,$@) 1524endif 1525 1526tools/: FORCE 1527 $(Q)mkdir -p $(objtree)/tools 1528 $(Q)$(MAKE) O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1529 1530tools/%: FORCE 1531 $(Q)mkdir -p $(objtree)/tools 1532 $(Q)$(MAKE) O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1533 1534# --------------------------------------------------------------------------- 1535# Kernel selftest 1536 1537PHONY += kselftest 1538kselftest: headers 1539 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1540 1541kselftest-%: headers FORCE 1542 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1543 1544PHONY += kselftest-merge 1545kselftest-merge: 1546 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1547 $(Q)find $(srctree)/tools/testing/selftests -name config -o -name config.$(UTS_MACHINE) | \ 1548 xargs $(srctree)/scripts/kconfig/merge_config.sh -y -m $(objtree)/.config 1549 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1550 1551# --------------------------------------------------------------------------- 1552# Devicetree files 1553 1554ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1555dtstree := arch/$(SRCARCH)/boot/dts 1556endif 1557 1558dtbindingtree := Documentation/devicetree/bindings 1559 1560%.yaml: dtbs_prepare 1561 $(Q)$(MAKE) $(build)=$(dtbindingtree) \ 1562 $(dtbindingtree)/$(patsubst %.yaml,%.example.dtb,$@) dt_binding_check_one 1563 1564ifneq ($(dtstree),) 1565 1566%.dtb: dtbs_prepare 1567 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1568 1569%.dtbo: dtbs_prepare 1570 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1571 1572PHONY += dtbs dtbs_prepare dtbs_install dtbs_check 1573dtbs: dtbs_prepare 1574 $(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1 1575 1576# include/config/kernel.release is actually needed when installing DTBs because 1577# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make 1578# dtbs_install depend on it as dtbs_install may run as root. 1579dtbs_prepare: include/config/kernel.release scripts_dtc 1580 1581ifneq ($(filter dtbs_check %.yaml, $(MAKECMDGOALS)),) 1582export CHECK_DTBS=y 1583endif 1584 1585ifneq ($(CHECK_DTBS),) 1586dtbs_prepare: dt_binding_schemas 1587endif 1588 1589dtbs_check: dtbs 1590 1591dtbs_install: 1592 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.dtbinst obj=$(dtstree) 1593 1594ifdef CONFIG_OF_EARLY_FLATTREE 1595all: dtbs 1596endif 1597 1598ifdef CONFIG_GENERIC_BUILTIN_DTB 1599vmlinux: dtbs 1600endif 1601 1602endif 1603 1604PHONY += scripts_dtc 1605scripts_dtc: scripts_basic 1606 $(Q)$(MAKE) $(build)=scripts/dtc 1607 1608ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) 1609export CHECK_DTBS=y 1610endif 1611 1612PHONY += dt_binding_check dt_binding_schemas 1613dt_binding_check: dt_binding_schemas scripts_dtc 1614 $(Q)$(MAKE) $(build)=$(dtbindingtree) $@ 1615 1616dt_binding_schemas: 1617 $(Q)$(MAKE) $(build)=$(dtbindingtree) 1618 1619PHONY += dt_compatible_check 1620dt_compatible_check: dt_binding_schemas 1621 $(Q)$(MAKE) $(build)=$(dtbindingtree) $@ 1622 1623# --------------------------------------------------------------------------- 1624# Modules 1625 1626ifdef CONFIG_MODULES 1627 1628# By default, build modules as well 1629 1630all: modules 1631 1632# When we're building modules with modversions, we need to consider 1633# the built-in objects during the descend as well, in order to 1634# make sure the checksums are up to date before we record them. 1635ifdef CONFIG_MODVERSIONS 1636 KBUILD_BUILTIN := y 1637endif 1638 1639# Build modules 1640# 1641 1642# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES 1643# is an exception. 1644ifdef CONFIG_DEBUG_INFO_BTF_MODULES 1645KBUILD_BUILTIN := y 1646modules: vmlinux 1647endif 1648 1649modules: modules_prepare 1650 1651# Target to prepare building external modules 1652modules_prepare: prepare 1653 $(Q)$(MAKE) $(build)=scripts scripts/module.lds 1654 1655endif # CONFIG_MODULES 1656 1657### 1658# Cleaning is done on three levels. 1659# make clean Delete most generated files 1660# Leave enough to build external modules 1661# make mrproper Delete the current configuration, and all generated files 1662# make distclean Remove editor backup files, patch leftover files and the like 1663 1664# Directories & files removed with 'make clean' 1665CLEAN_FILES += vmlinux.symvers modules-only.symvers \ 1666 modules.builtin modules.builtin.modinfo modules.nsdeps \ 1667 modules.builtin.ranges vmlinux.o.map vmlinux.unstripped \ 1668 compile_commands.json rust/test \ 1669 rust-project.json .vmlinux.objs .vmlinux.export.c \ 1670 .builtin-dtbs-list .builtin-dtb.S 1671 1672# Directories & files removed with 'make mrproper' 1673MRPROPER_FILES += include/config include/generated \ 1674 arch/$(SRCARCH)/include/generated .objdiff \ 1675 debian snap tar-install PKGBUILD pacman \ 1676 .config .config.old .version \ 1677 Module.symvers \ 1678 certs/signing_key.pem \ 1679 certs/x509.genkey \ 1680 vmlinux-gdb.py \ 1681 rpmbuild \ 1682 rust/libmacros.so rust/libmacros.dylib \ 1683 rust/libpin_init_internal.so rust/libpin_init_internal.dylib 1684 1685# clean - Delete most, but leave enough to build external modules 1686# 1687clean: private rm-files := $(CLEAN_FILES) 1688 1689PHONY += archclean vmlinuxclean 1690 1691vmlinuxclean: 1692 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1693 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1694 1695clean: archclean vmlinuxclean resolve_btfids_clean objtool_clean 1696 1697# mrproper - Delete all generated files, including .config 1698# 1699mrproper: private rm-files := $(MRPROPER_FILES) 1700mrproper-dirs := $(addprefix _mrproper_,scripts) 1701 1702PHONY += $(mrproper-dirs) mrproper 1703$(mrproper-dirs): 1704 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1705 1706mrproper: clean objtool_mrproper $(mrproper-dirs) 1707 $(call cmd,rmfiles) 1708 @find . $(RCS_FIND_IGNORE) \ 1709 \( -name '*.rmeta' \) \ 1710 -type f -print | xargs rm -f 1711 1712# distclean 1713# 1714PHONY += distclean 1715 1716distclean: mrproper 1717 @find . $(RCS_FIND_IGNORE) \ 1718 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1719 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1720 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ 1721 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ 1722 -type f -print | xargs rm -f 1723 1724 1725# Packaging of the kernel to various formats 1726# --------------------------------------------------------------------------- 1727 1728modules-cpio-pkg: usr_gen_init_cpio 1729 1730%src-pkg: FORCE 1731 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1732%pkg: include/config/kernel.release FORCE 1733 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1734 1735# Brief documentation of the typical targets used 1736# --------------------------------------------------------------------------- 1737 1738boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1739boards := $(sort $(notdir $(boards))) 1740board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1741board-dirs := $(sort $(notdir $(board-dirs:/=))) 1742 1743PHONY += help 1744help: 1745 @echo 'Cleaning targets:' 1746 @echo ' clean - Remove most generated files but keep the config and' 1747 @echo ' enough build support to build external modules' 1748 @echo ' mrproper - Remove all generated files + config + various backup files' 1749 @echo ' distclean - mrproper + remove editor backup and patch files' 1750 @echo '' 1751 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1752 @echo '' 1753 @echo 'Other generic targets:' 1754 @echo ' all - Build all targets marked with [*]' 1755 @echo '* vmlinux - Build the bare kernel' 1756 @echo '* modules - Build all modules' 1757 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1758 @echo ' vdso_install - Install unstripped vdso to INSTALL_MOD_PATH (default: /)' 1759 @echo ' dir/ - Build all files in dir and below' 1760 @echo ' dir/file.[ois] - Build specified target only' 1761 @echo ' dir/file.ll - Build the LLVM assembly file' 1762 @echo ' (requires compiler support for LLVM assembly generation)' 1763 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1764 @echo ' (requires a recent binutils and recent build (System.map))' 1765 @echo ' dir/file.ko - Build module including final link' 1766 @echo ' modules_prepare - Set up for building external modules' 1767 @echo ' tags/TAGS - Generate tags file for editors' 1768 @echo ' cscope - Generate cscope index' 1769 @echo ' gtags - Generate GNU GLOBAL index' 1770 @echo ' kernelrelease - Output the release version string (use with make -s)' 1771 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1772 @echo ' image_name - Output the image name (use with make -s)' 1773 @echo ' headers - Build ready-to-install UAPI headers in usr/include' 1774 @echo ' headers_install - Install sanitised kernel UAPI headers to INSTALL_HDR_PATH'; \ 1775 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1776 echo '' 1777 @echo 'Static analysers:' 1778 @echo ' checkstack - Generate a list of stack hogs and consider all functions' 1779 @echo ' with a stack size larger than MINSTACKSIZE (default: 100)' 1780 @echo ' versioncheck - Sanity check on version.h usage' 1781 @echo ' includecheck - Check for duplicate included header files' 1782 @echo ' headerdep - Detect inclusion cycles in headers' 1783 @echo ' coccicheck - Check with Coccinelle' 1784 @echo ' clang-analyzer - Check with clang static analyzer' 1785 @echo ' clang-tidy - Check with clang-tidy' 1786 @echo '' 1787 @echo 'Tools:' 1788 @echo ' nsdeps - Generate missing symbol namespace dependencies' 1789 @echo '' 1790 @echo 'Kernel selftest:' 1791 @echo ' kselftest - Build and run kernel selftest' 1792 @echo ' Build, install, and boot kernel before' 1793 @echo ' running kselftest on it' 1794 @echo ' Run as root for full coverage' 1795 @echo ' kselftest-all - Build kernel selftest' 1796 @echo ' kselftest-install - Build and install kernel selftest' 1797 @echo ' kselftest-clean - Remove all generated kselftest files' 1798 @echo ' kselftest-merge - Merge all the config dependencies of' 1799 @echo ' kselftest to existing .config.' 1800 @echo '' 1801 @echo 'Rust targets:' 1802 @echo ' rustavailable - Checks whether the Rust toolchain is' 1803 @echo ' available and, if not, explains why.' 1804 @echo ' rustfmt - Reformat all the Rust code in the kernel' 1805 @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' 1806 @echo ' is formatted, printing a diff otherwise.' 1807 @echo ' rustdoc - Generate Rust documentation' 1808 @echo ' (requires kernel .config)' 1809 @echo ' rusttest - Runs the Rust tests' 1810 @echo ' (requires kernel .config; downloads external repos)' 1811 @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' 1812 @echo ' (requires kernel .config)' 1813 @echo ' dir/file.[os] - Build specified target only' 1814 @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' 1815 @echo ' Run with RUSTFMT=n to skip reformatting if needed.' 1816 @echo ' The output is not intended to be compilable.' 1817 @echo ' dir/file.ll - Build the LLVM assembly file' 1818 @echo '' 1819 @$(if $(dtstree), \ 1820 echo 'Devicetree:'; \ 1821 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1822 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1823 echo ' dt_binding_check - Validate device tree binding documents and examples'; \ 1824 echo ' dt_binding_schemas - Build processed device tree binding schemas'; \ 1825 echo ' dtbs_check - Validate device tree source files';\ 1826 echo '') 1827 1828 @echo 'Userspace tools targets:' 1829 @echo ' use "make tools/help"' 1830 @echo ' or "cd tools; make help"' 1831 @echo '' 1832 @echo 'Kernel packaging:' 1833 @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1834 @echo '' 1835 @echo 'Documentation targets:' 1836 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1837 @echo '' 1838 @echo 'Architecture-specific targets ($(SRCARCH)):' 1839 @$(or $(archhelp),\ 1840 echo ' No architecture-specific help defined for $(SRCARCH)') 1841 @echo '' 1842 @$(if $(boards), \ 1843 $(foreach b, $(boards), \ 1844 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1845 echo '') 1846 @$(if $(board-dirs), \ 1847 $(foreach b, $(board-dirs), \ 1848 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1849 printf " %-16s - Show all of the above\\n" help-boards; \ 1850 echo '') 1851 1852 @echo ' make V=n [targets] 1: verbose build' 1853 @echo ' 2: give reason for rebuild of target' 1854 @echo ' V=1 and V=2 can be combined with V=12' 1855 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1856 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1857 @echo ' (sparse by default)' 1858 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1859 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1860 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3,c,e where' 1861 @echo ' 1: warnings which may be relevant and do not occur too often' 1862 @echo ' 2: warnings which occur quite often but may still be relevant' 1863 @echo ' 3: more obscure warnings, can most likely be ignored' 1864 @echo ' c: extra checks in the configuration stage (Kconfig)' 1865 @echo ' e: warnings are being treated as errors' 1866 @echo ' Multiple levels can be combined with W=12 or W=123' 1867 @echo ' make UT=1 [targets] Warn if a tracepoint is defined but not used.' 1868 @echo ' [ This will be removed when all current unused tracepoints are eliminated. ]' 1869 @$(if $(dtstree), \ 1870 echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ 1871 echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ 1872 ) 1873 @echo '' 1874 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1875 @echo 'For further info see the ./README file' 1876 1877 1878help-board-dirs := $(addprefix help-,$(board-dirs)) 1879 1880help-boards: $(help-board-dirs) 1881 1882boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1883 1884$(help-board-dirs): help-%: 1885 @echo 'Architecture-specific targets ($(SRCARCH) $*):' 1886 @$(if $(boards-per-dir), \ 1887 $(foreach b, $(boards-per-dir), \ 1888 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1889 echo '') 1890 1891 1892# Documentation targets 1893# --------------------------------------------------------------------------- 1894DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1895 linkcheckdocs dochelp refcheckdocs texinfodocs infodocs mandocs \ 1896 htmldocs-redirects 1897 1898PHONY += $(DOC_TARGETS) 1899$(DOC_TARGETS): 1900 $(Q)$(MAKE) $(build)=Documentation $@ 1901 1902 1903# Rust targets 1904# --------------------------------------------------------------------------- 1905 1906# "Is Rust available?" target 1907PHONY += rustavailable 1908rustavailable: 1909 +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!" 1910 1911# Documentation target 1912# 1913# Using the singular to avoid running afoul of `no-dot-config-targets`. 1914PHONY += rustdoc 1915rustdoc: prepare 1916 $(Q)$(MAKE) $(build)=rust $@ 1917 1918# Testing target 1919PHONY += rusttest 1920rusttest: prepare 1921 $(Q)$(MAKE) $(build)=rust $@ 1922 1923# Formatting targets 1924# 1925# Generated files as well as vendored crates are skipped. 1926PHONY += rustfmt rustfmtcheck 1927 1928rustfmt: 1929 $(Q)find $(srctree) $(RCS_FIND_IGNORE) \ 1930 \( \ 1931 -path $(srctree)/rust/proc-macro2 \ 1932 -o -path $(srctree)/rust/quote \ 1933 -o -path $(srctree)/rust/syn \ 1934 \) -prune -o \ 1935 -type f -a -name '*.rs' -a ! -name '*generated*' -print \ 1936 | xargs $(RUSTFMT) $(rustfmt_flags) 1937 1938rustfmtcheck: rustfmt_flags = --check 1939rustfmtcheck: rustfmt 1940 1941# Misc 1942# --------------------------------------------------------------------------- 1943 1944PHONY += misc-check 1945misc-check: 1946 $(Q)$(srctree)/scripts/misc-check 1947 1948all: misc-check 1949 1950PHONY += scripts_gdb 1951scripts_gdb: prepare0 1952 $(Q)$(MAKE) $(build)=scripts/gdb 1953 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1954 1955ifdef CONFIG_GDB_SCRIPTS 1956all: scripts_gdb 1957endif 1958 1959else # KBUILD_EXTMOD 1960 1961filechk_kernel.release = echo $(KERNELRELEASE) 1962 1963### 1964# External module support. 1965# When building external modules the kernel used as basis is considered 1966# read-only, and no consistency checks are made and the make 1967# system is not used on the basis kernel. If updates are required 1968# in the basis kernel ordinary make commands (without M=...) must be used. 1969 1970# We are always building only modules. 1971KBUILD_BUILTIN := 1972KBUILD_MODULES := y 1973 1974build-dir := . 1975 1976clean-dirs := . 1977clean: private rm-files := Module.symvers modules.nsdeps compile_commands.json 1978 1979PHONY += prepare 1980# now expand this into a simple variable to reduce the cost of shell evaluations 1981prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) 1982prepare: PAHOLE_VERSION := $(PAHOLE_VERSION) 1983prepare: 1984 @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ 1985 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ 1986 echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ 1987 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ 1988 fi 1989 @if [ "$(PAHOLE_VERSION)" != "$(CONFIG_PAHOLE_VERSION)" ]; then \ 1990 echo >&2 "warning: pahole version differs from the one used to build the kernel"; \ 1991 echo >&2 " The kernel was built with: $(CONFIG_PAHOLE_VERSION)"; \ 1992 echo >&2 " You are using: $(PAHOLE_VERSION)"; \ 1993 fi 1994 1995PHONY += help 1996help: 1997 @echo ' Building external modules.' 1998 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1999 @echo '' 2000 @echo ' modules - default target, build the module(s)' 2001 @echo ' modules_install - install the module' 2002 @echo ' clean - remove generated files in module directory only' 2003 @echo ' rust-analyzer - generate rust-project.json rust-analyzer support file' 2004 @echo '' 2005 2006ifndef CONFIG_MODULES 2007modules modules_install: __external_modules_error 2008__external_modules_error: 2009 @echo >&2 '***' 2010 @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' 2011 @echo >&2 '*** You cannot build or install external modules.' 2012 @echo >&2 '***' 2013 @false 2014endif 2015 2016endif # KBUILD_EXTMOD 2017 2018# --------------------------------------------------------------------------- 2019# Modules 2020 2021PHONY += modules modules_install modules_sign modules_prepare 2022 2023modules_install: 2024 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \ 2025 sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y) 2026 2027ifeq ($(CONFIG_MODULE_SIG),y) 2028# modules_sign is a subset of modules_install. 2029# 'make modules_install modules_sign' is equivalent to 'make modules_install'. 2030modules_sign: modules_install 2031 @: 2032else 2033modules_sign: 2034 @echo >&2 '***' 2035 @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.' 2036 @echo >&2 '***' 2037 @false 2038endif 2039 2040ifdef CONFIG_MODULES 2041 2042modules.order: $(build-dir) 2043 @: 2044 2045# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. 2046# This is solely useful to speed up test compiles. 2047modules: modpost 2048ifneq ($(KBUILD_MODPOST_NOFINAL),1) 2049 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 2050endif 2051 2052PHONY += modules_check 2053modules_check: modules.order 2054 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< 2055 2056else # CONFIG_MODULES 2057 2058modules: 2059 @: 2060 2061KBUILD_MODULES := 2062 2063endif # CONFIG_MODULES 2064 2065PHONY += modpost 2066modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ 2067 $(if $(KBUILD_MODULES), modules_check) 2068 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 2069 2070# Single targets 2071# --------------------------------------------------------------------------- 2072# To build individual files in subdirectories, you can do like this: 2073# 2074# make foo/bar/baz.s 2075# 2076# The supported suffixes for single-target are listed in 'single-targets' 2077# 2078# To build only under specific subdirectories, you can do like this: 2079# 2080# make foo/bar/baz/ 2081 2082ifdef single-build 2083 2084# .ko is special because modpost is needed 2085single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 2086single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ 2087 $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) 2088 2089$(single-ko): single_modules 2090 @: 2091$(single-no-ko): $(build-dir) 2092 @: 2093 2094# Remove modules.order when done because it is not the real one. 2095PHONY += single_modules 2096single_modules: $(single-no-ko) modules_prepare 2097 $(Q){ $(foreach m, $(single-ko), echo $(m:%.ko=%.o);) } > modules.order 2098 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 2099ifneq ($(KBUILD_MODPOST_NOFINAL),1) 2100 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal 2101endif 2102 $(Q)rm -f modules.order 2103 2104single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) 2105 2106KBUILD_MODULES := y 2107 2108endif 2109 2110prepare: outputmakefile 2111 2112# Preset locale variables to speed up the build process. Limit locale 2113# tweaks to this spot to avoid wrong language settings when running 2114# make menuconfig etc. 2115# Error messages still appears in the original language 2116PHONY += $(build-dir) 2117$(build-dir): prepare 2118 $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) 2119 2120clean-dirs := $(addprefix _clean_, $(clean-dirs)) 2121PHONY += $(clean-dirs) clean 2122$(clean-dirs): 2123 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 2124 2125clean: $(clean-dirs) 2126 $(call cmd,rmfiles) 2127 @find . $(RCS_FIND_IGNORE) \ 2128 \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ 2129 -o -name '*.ko.*' \ 2130 -o -name '*.dtb' -o -name '*.dtbo' \ 2131 -o -name '*.dtb.S' -o -name '*.dtbo.S' \ 2132 -o -name '*.dt.yaml' -o -name 'dtbs-list' \ 2133 -o -name '*.dwo' -o -name '*.lst' \ 2134 -o -name '*.su' -o -name '*.mod' \ 2135 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 2136 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 2137 -o -name '*.asn1.[ch]' \ 2138 -o -name '*.symtypes' -o -name 'modules.order' \ 2139 -o -name '*.c.[012]*.*' \ 2140 -o -name '*.ll' \ 2141 -o -name '*.gcno' \ 2142 \) -type f -print \ 2143 -o -name '.tmp_*' -print \ 2144 | xargs rm -rf 2145 2146# Generate tags for editors 2147# --------------------------------------------------------------------------- 2148quiet_cmd_tags = GEN $@ 2149 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 2150 2151tags TAGS cscope gtags: FORCE 2152 $(call cmd,tags) 2153 2154# Generate rust-project.json (a file that describes the structure of non-Cargo 2155# Rust projects) for rust-analyzer (an implementation of the Language Server 2156# Protocol). 2157PHONY += rust-analyzer 2158rust-analyzer: 2159 +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh 2160ifdef KBUILD_EXTMOD 2161# FIXME: external modules must not descend into a sub-directory of the kernel 2162 $(Q)$(MAKE) $(build)=$(objtree)/rust src=$(srctree)/rust $@ 2163else 2164 $(Q)$(MAKE) $(build)=rust $@ 2165endif 2166 2167# Script to generate missing namespace dependencies 2168# --------------------------------------------------------------------------- 2169 2170PHONY += nsdeps 2171nsdeps: export KBUILD_NSDEPS=1 2172nsdeps: modules 2173 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 2174 2175# Clang Tooling 2176# --------------------------------------------------------------------------- 2177 2178quiet_cmd_gen_compile_commands = GEN $@ 2179 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) 2180 2181compile_commands.json: $(srctree)/scripts/clang-tools/gen_compile_commands.py \ 2182 $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ 2183 $(if $(CONFIG_MODULES), modules.order) FORCE 2184 $(call if_changed,gen_compile_commands) 2185 2186targets += compile_commands.json 2187 2188PHONY += clang-tidy clang-analyzer 2189 2190ifdef CONFIG_CC_IS_CLANG 2191quiet_cmd_clang_tools = CHECK $< 2192 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< 2193 2194clang-tidy clang-analyzer: compile_commands.json 2195 $(call cmd,clang_tools) 2196else 2197clang-tidy clang-analyzer: 2198 @echo "$@ requires CC=clang" >&2 2199 @false 2200endif 2201 2202# Scripts to check various things for consistency 2203# --------------------------------------------------------------------------- 2204 2205PHONY += includecheck versioncheck coccicheck 2206 2207includecheck: 2208 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2209 -name '*.[hcS]' -type f -print | sort \ 2210 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 2211 2212versioncheck: 2213 find $(srctree)/* $(RCS_FIND_IGNORE) \ 2214 -name '*.[hcS]' -type f -print | sort \ 2215 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 2216 2217coccicheck: 2218 $(Q)$(BASH) $(srctree)/scripts/$@ 2219 2220PHONY += checkstack kernelrelease kernelversion image_name 2221 2222# UML needs a little special treatment here. It wants to use the host 2223# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 2224# else wants $(ARCH), including people doing cross-builds, which means 2225# that $(SUBARCH) doesn't work here. 2226ifeq ($(ARCH), um) 2227CHECKSTACK_ARCH := $(SUBARCH) 2228else 2229CHECKSTACK_ARCH := $(ARCH) 2230endif 2231MINSTACKSIZE ?= 100 2232checkstack: 2233 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 2234 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) $(MINSTACKSIZE) 2235 2236kernelrelease: 2237 @$(filechk_kernel.release) 2238 2239kernelversion: 2240 @echo $(KERNELVERSION) 2241 2242image_name: 2243 @echo $(KBUILD_IMAGE) 2244 2245PHONY += run-command 2246run-command: 2247 $(Q)$(KBUILD_RUN_COMMAND) 2248 2249quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 2250 cmd_rmfiles = rm -rf $(rm-files) 2251 2252# read saved command lines for existing targets 2253existing-targets := $(wildcard $(sort $(targets))) 2254 2255-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 2256 2257endif # config-build 2258endif # mixed-build 2259endif # need-sub-make 2260 2261PHONY += FORCE 2262FORCE: 2263 2264# Declare the contents of the PHONY variable as phony. We keep that 2265# information in a variable so we can use it in if_changed and friends. 2266.PHONY: $(PHONY) 2267