1# SPDX-License-Identifier: GPL-2.0 2VERSION = 5 3PATCHLEVEL = 6 4SUBLEVEL = 0 5EXTRAVERSION = 6NAME = Kleptomaniac Octopus 7 8# *DOCUMENTATION* 9# To see a list of typical targets execute "make help" 10# More info can be located in ./README 11# Comments in this file are targeted only to the developer, do not 12# expect to learn how to build the kernel reading this file. 13 14# That's our default target when none is given on the command line 15PHONY := _all 16_all: 17 18# We are using a recursive build, so we need to do a little thinking 19# to get the ordering right. 20# 21# Most importantly: sub-Makefiles should only ever modify files in 22# their own directory. If in some directory we have a dependency on 23# a file in another dir (which doesn't happen often, but it's often 24# unavoidable when linking the built-in.a targets which finally 25# turn into vmlinux), we will call a sub make in that other dir, and 26# after that we are sure that everything which is in that other dir 27# is now up to date. 28# 29# The only cases where we need to modify files which have global 30# effects are thus separated out and done before the recursive 31# descending is started. They are now explicitly listed as the 32# prepare rule. 33 34ifneq ($(sub_make_done),1) 35 36# Do not use make's built-in rules and variables 37# (this increases performance and avoids hard-to-debug behaviour) 38MAKEFLAGS += -rR 39 40# Avoid funny character set dependencies 41unexport LC_ALL 42LC_COLLATE=C 43LC_NUMERIC=C 44export LC_COLLATE LC_NUMERIC 45 46# Avoid interference with shell env settings 47unexport GREP_OPTIONS 48 49# Beautify output 50# --------------------------------------------------------------------------- 51# 52# Normally, we echo the whole command before executing it. By making 53# that echo $($(quiet)$(cmd)), we now have the possibility to set 54# $(quiet) to choose other forms of output instead, e.g. 55# 56# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 57# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 58# 59# If $(quiet) is empty, the whole command will be printed. 60# If it is set to "quiet_", only the short version will be printed. 61# If it is set to "silent_", nothing will be printed at all, since 62# the variable $(silent_cmd_cc_o_c) doesn't exist. 63# 64# A simple variant is to prefix commands with $(Q) - that's useful 65# for commands that shall be hidden in non-verbose mode. 66# 67# $(Q)ln $@ :< 68# 69# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 70# If KBUILD_VERBOSE equals 1 then the above command is displayed. 71# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. 72# 73# To put more focus on warnings, be less verbose as default 74# Use 'make V=1' to see the full commands 75 76ifeq ("$(origin V)", "command line") 77 KBUILD_VERBOSE = $(V) 78endif 79ifndef KBUILD_VERBOSE 80 KBUILD_VERBOSE = 0 81endif 82 83ifeq ($(KBUILD_VERBOSE),1) 84 quiet = 85 Q = 86else 87 quiet=quiet_ 88 Q = @ 89endif 90 91# If the user is running make -s (silent mode), suppress echoing of 92# commands 93 94ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 95 quiet=silent_ 96endif 97 98export quiet Q KBUILD_VERBOSE 99 100# Kbuild will save output files in the current working directory. 101# This does not need to match to the root of the kernel source tree. 102# 103# For example, you can do this: 104# 105# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 106# 107# If you want to save output files in a different location, there are 108# two syntaxes to specify it. 109# 110# 1) O= 111# Use "make O=dir/to/store/output/files/" 112# 113# 2) Set KBUILD_OUTPUT 114# Set the environment variable KBUILD_OUTPUT to point to the output directory. 115# export KBUILD_OUTPUT=dir/to/store/output/files/; make 116# 117# The O= assignment takes precedence over the KBUILD_OUTPUT environment 118# variable. 119 120# Do we want to change the working directory? 121ifeq ("$(origin O)", "command line") 122 KBUILD_OUTPUT := $(O) 123endif 124 125ifneq ($(KBUILD_OUTPUT),) 126# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 127# expand a shell special character '~'. We use a somewhat tedious way here. 128abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 129$(if $(abs_objtree),, \ 130 $(error failed to create output directory "$(KBUILD_OUTPUT)")) 131 132# $(realpath ...) resolves symlinks 133abs_objtree := $(realpath $(abs_objtree)) 134else 135abs_objtree := $(CURDIR) 136endif # ifneq ($(KBUILD_OUTPUT),) 137 138ifeq ($(abs_objtree),$(CURDIR)) 139# Suppress "Entering directory ..." unless we are changing the work directory. 140MAKEFLAGS += --no-print-directory 141else 142need-sub-make := 1 143endif 144 145abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 146 147ifneq ($(words $(subst :, ,$(abs_srctree))), 1) 148$(error source directory cannot contain spaces or colons) 149endif 150 151ifneq ($(abs_srctree),$(abs_objtree)) 152# Look for make include files relative to root of kernel src 153# 154# This does not become effective immediately because MAKEFLAGS is re-parsed 155# once after the Makefile is read. We need to invoke sub-make. 156MAKEFLAGS += --include-dir=$(abs_srctree) 157need-sub-make := 1 158endif 159 160ifneq ($(filter 3.%,$(MAKE_VERSION)),) 161# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 162# We need to invoke sub-make to avoid implicit rules in the top Makefile. 163need-sub-make := 1 164# Cancel implicit rules for this Makefile. 165$(lastword $(MAKEFILE_LIST)): ; 166endif 167 168export abs_srctree abs_objtree 169export sub_make_done := 1 170 171ifeq ($(need-sub-make),1) 172 173PHONY += $(MAKECMDGOALS) sub-make 174 175$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make 176 @: 177 178# Invoke a second make in the output directory, passing relevant variables 179sub-make: 180 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 181 182endif # need-sub-make 183endif # sub_make_done 184 185# We process the rest of the Makefile if this is the final invocation of make 186ifeq ($(need-sub-make),) 187 188# Do not print "Entering directory ...", 189# but we want to display it when entering to the output directory 190# so that IDEs/editors are able to understand relative filenames. 191MAKEFLAGS += --no-print-directory 192 193# Call a source code checker (by default, "sparse") as part of the 194# C compilation. 195# 196# Use 'make C=1' to enable checking of only re-compiled files. 197# Use 'make C=2' to enable checking of *all* source files, regardless 198# of whether they are re-compiled or not. 199# 200# See the file "Documentation/dev-tools/sparse.rst" for more details, 201# including where to get the "sparse" utility. 202 203ifeq ("$(origin C)", "command line") 204 KBUILD_CHECKSRC = $(C) 205endif 206ifndef KBUILD_CHECKSRC 207 KBUILD_CHECKSRC = 0 208endif 209 210# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 211# directory of external module to build. Setting M= takes precedence. 212ifeq ("$(origin M)", "command line") 213 KBUILD_EXTMOD := $(M) 214endif 215 216export KBUILD_CHECKSRC KBUILD_EXTMOD 217 218extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 219 220ifeq ($(abs_srctree),$(abs_objtree)) 221 # building in the source tree 222 srctree := . 223 building_out_of_srctree := 224else 225 ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 226 # building in a subdirectory of the source tree 227 srctree := .. 228 else 229 srctree := $(abs_srctree) 230 endif 231 building_out_of_srctree := 1 232endif 233 234ifneq ($(KBUILD_ABS_SRCTREE),) 235srctree := $(abs_srctree) 236endif 237 238objtree := . 239VPATH := $(srctree) 240 241export building_out_of_srctree srctree objtree VPATH 242 243# To make sure we do not include .config for any of the *config targets 244# catch them early, and hand them over to scripts/kconfig/Makefile 245# It is allowed to specify more targets when calling make, including 246# mixing *config targets and build targets. 247# For example 'make oldconfig all'. 248# Detect when mixed targets is specified, and make a second invocation 249# of make so .config is not included in this case either (for *config). 250 251version_h := include/generated/uapi/linux/version.h 252old_version_h := include/linux/version.h 253 254clean-targets := %clean mrproper cleandocs 255no-dot-config-targets := $(clean-targets) \ 256 cscope gtags TAGS tags help% %docs check% coccicheck \ 257 $(version_h) headers headers_% archheaders archscripts \ 258 %asm-generic kernelversion %src-pkg 259no-sync-config-targets := $(no-dot-config-targets) install %install \ 260 kernelrelease 261single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 262 263config-build := 264mixed-build := 265need-config := 1 266may-sync-config := 1 267single-build := 268 269ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 270 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 271 need-config := 272 endif 273endif 274 275ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 276 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 277 may-sync-config := 278 endif 279endif 280 281ifneq ($(KBUILD_EXTMOD),) 282 may-sync-config := 283endif 284 285ifeq ($(KBUILD_EXTMOD),) 286 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 287 config-build := 1 288 ifneq ($(words $(MAKECMDGOALS)),1) 289 mixed-build := 1 290 endif 291 endif 292endif 293 294# We cannot build single targets and the others at the same time 295ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 296 single-build := 1 297 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 298 mixed-build := 1 299 endif 300endif 301 302# For "make -j clean all", "make -j mrproper defconfig all", etc. 303ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 304 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 305 mixed-build := 1 306 endif 307endif 308 309# install and modules_install need also be processed one by one 310ifneq ($(filter install,$(MAKECMDGOALS)),) 311 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 312 mixed-build := 1 313 endif 314endif 315 316ifdef mixed-build 317# =========================================================================== 318# We're called with mixed targets (*config and build targets). 319# Handle them one by one. 320 321PHONY += $(MAKECMDGOALS) __build_one_by_one 322 323$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 324 @: 325 326__build_one_by_one: 327 $(Q)set -e; \ 328 for i in $(MAKECMDGOALS); do \ 329 $(MAKE) -f $(srctree)/Makefile $$i; \ 330 done 331 332else # !mixed-build 333 334include scripts/Kbuild.include 335 336# Read KERNELRELEASE from include/config/kernel.release (if it exists) 337KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 338KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 339export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 340 341include scripts/subarch.include 342 343# Cross compiling and selecting different set of gcc/bin-utils 344# --------------------------------------------------------------------------- 345# 346# When performing cross compilation for other architectures ARCH shall be set 347# to the target architecture. (See arch/* for the possibilities). 348# ARCH can be set during invocation of make: 349# make ARCH=ia64 350# Another way is to have ARCH set in the environment. 351# The default ARCH is the host where make is executed. 352 353# CROSS_COMPILE specify the prefix used for all executables used 354# during compilation. Only gcc and related bin-utils executables 355# are prefixed with $(CROSS_COMPILE). 356# CROSS_COMPILE can be set on the command line 357# make CROSS_COMPILE=ia64-linux- 358# Alternatively CROSS_COMPILE can be set in the environment. 359# Default value for CROSS_COMPILE is not to prefix executables 360# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 361ARCH ?= $(SUBARCH) 362 363# Architecture as present in compile.h 364UTS_MACHINE := $(ARCH) 365SRCARCH := $(ARCH) 366 367# Additional ARCH settings for x86 368ifeq ($(ARCH),i386) 369 SRCARCH := x86 370endif 371ifeq ($(ARCH),x86_64) 372 SRCARCH := x86 373endif 374 375# Additional ARCH settings for sparc 376ifeq ($(ARCH),sparc32) 377 SRCARCH := sparc 378endif 379ifeq ($(ARCH),sparc64) 380 SRCARCH := sparc 381endif 382 383# Additional ARCH settings for sh 384ifeq ($(ARCH),sh64) 385 SRCARCH := sh 386endif 387 388KCONFIG_CONFIG ?= .config 389export KCONFIG_CONFIG 390 391# SHELL used by kbuild 392CONFIG_SHELL := sh 393 394HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 395HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 396HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 397 398HOSTCC = gcc 399HOSTCXX = g++ 400KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 401 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 402 $(HOSTCFLAGS) 403KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 404KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 405KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 406 407# Make variables (CC, etc...) 408AS = $(CROSS_COMPILE)as 409LD = $(CROSS_COMPILE)ld 410CC = $(CROSS_COMPILE)gcc 411CPP = $(CC) -E 412AR = $(CROSS_COMPILE)ar 413NM = $(CROSS_COMPILE)nm 414STRIP = $(CROSS_COMPILE)strip 415OBJCOPY = $(CROSS_COMPILE)objcopy 416OBJDUMP = $(CROSS_COMPILE)objdump 417OBJSIZE = $(CROSS_COMPILE)size 418READELF = $(CROSS_COMPILE)readelf 419PAHOLE = pahole 420LEX = flex 421YACC = bison 422AWK = awk 423INSTALLKERNEL := installkernel 424DEPMOD = /sbin/depmod 425PERL = perl 426PYTHON = python 427PYTHON3 = python3 428CHECK = sparse 429BASH = bash 430 431CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 432 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 433NOSTDINC_FLAGS := 434CFLAGS_MODULE = 435AFLAGS_MODULE = 436LDFLAGS_MODULE = 437CFLAGS_KERNEL = 438AFLAGS_KERNEL = 439LDFLAGS_vmlinux = 440 441# Use USERINCLUDE when you must reference the UAPI directories only. 442USERINCLUDE := \ 443 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 444 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 445 -I$(srctree)/include/uapi \ 446 -I$(objtree)/include/generated/uapi \ 447 -include $(srctree)/include/linux/kconfig.h 448 449# Use LINUXINCLUDE when you must reference the include/ directory. 450# Needed to be compatible with the O= option 451LINUXINCLUDE := \ 452 -I$(srctree)/arch/$(SRCARCH)/include \ 453 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 454 $(if $(building_out_of_srctree),-I$(srctree)/include) \ 455 -I$(objtree)/include \ 456 $(USERINCLUDE) 457 458KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 459KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 460 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 461 -Werror=implicit-function-declaration -Werror=implicit-int \ 462 -Wno-format-security \ 463 -std=gnu89 464KBUILD_CPPFLAGS := -D__KERNEL__ 465KBUILD_AFLAGS_KERNEL := 466KBUILD_CFLAGS_KERNEL := 467KBUILD_AFLAGS_MODULE := -DMODULE 468KBUILD_CFLAGS_MODULE := -DMODULE 469KBUILD_LDFLAGS_MODULE := 470export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds 471KBUILD_LDFLAGS := 472GCC_PLUGINS_CFLAGS := 473CLANG_FLAGS := 474 475export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 476export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL 477export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 478export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 479 480export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 481export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 482export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 483export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 484export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 485export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 486 487# Files to ignore in find ... statements 488 489export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 490 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 491 -prune -o 492export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 493 --exclude CVS --exclude .pc --exclude .hg --exclude .git 494 495# =========================================================================== 496# Rules shared between *config targets and build targets 497 498# Basic helpers built in scripts/basic/ 499PHONY += scripts_basic 500scripts_basic: 501 $(Q)$(MAKE) $(build)=scripts/basic 502 $(Q)rm -f .tmp_quiet_recordmcount 503 504PHONY += outputmakefile 505# Before starting out-of-tree build, make sure the source tree is clean. 506# outputmakefile generates a Makefile in the output directory, if using a 507# separate output directory. This allows convenient use of make in the 508# output directory. 509# At the same time when output Makefile generated, generate .gitignore to 510# ignore whole output directory 511outputmakefile: 512ifdef building_out_of_srctree 513 $(Q)if [ -f $(srctree)/.config -o \ 514 -d $(srctree)/include/config -o \ 515 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 516 echo >&2 "***"; \ 517 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 518 echo >&2 "*** in $(abs_srctree)";\ 519 echo >&2 "***"; \ 520 false; \ 521 fi 522 $(Q)ln -fsn $(srctree) source 523 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 524 $(Q)test -e .gitignore || \ 525 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 526endif 527 528ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 529ifneq ($(CROSS_COMPILE),) 530CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 531GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 532CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 533GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 534endif 535ifneq ($(GCC_TOOLCHAIN),) 536CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 537endif 538ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) 539CLANG_FLAGS += -no-integrated-as 540endif 541CLANG_FLAGS += -Werror=unknown-warning-option 542KBUILD_CFLAGS += $(CLANG_FLAGS) 543KBUILD_AFLAGS += $(CLANG_FLAGS) 544export CLANG_FLAGS 545endif 546 547# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 548# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 549# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 550# and from include/config/auto.conf.cmd to detect the compiler upgrade. 551CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 552 553ifdef config-build 554# =========================================================================== 555# *config targets only - make sure prerequisites are updated, and descend 556# in scripts/kconfig to make the *config target 557 558# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 559# KBUILD_DEFCONFIG may point out an alternative default configuration 560# used for 'make defconfig' 561include arch/$(SRCARCH)/Makefile 562export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 563 564config: outputmakefile scripts_basic FORCE 565 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 566 567%config: outputmakefile scripts_basic FORCE 568 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 569 570else #!config-build 571# =========================================================================== 572# Build targets only - this includes vmlinux, arch specific targets, clean 573# targets and others. In general all targets except *config targets. 574 575# If building an external module we do not care about the all: rule 576# but instead _all depend on modules 577PHONY += all 578ifeq ($(KBUILD_EXTMOD),) 579_all: all 580else 581_all: modules 582endif 583 584# Decide whether to build built-in, modular, or both. 585# Normally, just do built-in. 586 587KBUILD_MODULES := 588KBUILD_BUILTIN := 1 589 590# If we have only "make modules", don't compile built-in objects. 591# When we're building modules with modversions, we need to consider 592# the built-in objects during the descend as well, in order to 593# make sure the checksums are up to date before we record them. 594 595ifeq ($(MAKECMDGOALS),modules) 596 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 597endif 598 599# If we have "make <whatever> modules", compile modules 600# in addition to whatever we do anyway. 601# Just "make" or "make all" shall build modules as well 602 603ifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),) 604 KBUILD_MODULES := 1 605endif 606 607ifeq ($(MAKECMDGOALS),) 608 KBUILD_MODULES := 1 609endif 610 611export KBUILD_MODULES KBUILD_BUILTIN 612 613ifdef need-config 614include include/config/auto.conf 615endif 616 617ifeq ($(KBUILD_EXTMOD),) 618# Objects we will link into vmlinux / subdirs we need to visit 619init-y := init/ 620drivers-y := drivers/ sound/ 621drivers-$(CONFIG_SAMPLES) += samples/ 622net-y := net/ 623libs-y := lib/ 624core-y := usr/ 625virt-y := virt/ 626endif # KBUILD_EXTMOD 627 628# The all: target is the default when no target is given on the 629# command line. 630# This allow a user to issue only 'make' to build a kernel including modules 631# Defaults to vmlinux, but the arch makefile usually adds further targets 632all: vmlinux 633 634CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 635 $(call cc-option,-fno-tree-loop-im) \ 636 $(call cc-disable-warning,maybe-uninitialized,) 637export CFLAGS_GCOV 638 639# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 640ifdef CONFIG_FUNCTION_TRACER 641 CC_FLAGS_FTRACE := -pg 642endif 643 644RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 645RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 646RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 647RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 648RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 649RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 650export RETPOLINE_CFLAGS 651export RETPOLINE_VDSO_CFLAGS 652 653include arch/$(SRCARCH)/Makefile 654 655ifdef need-config 656ifdef may-sync-config 657# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 658# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 659# because some architectures define CROSS_COMPILE there. 660include include/config/auto.conf.cmd 661 662$(KCONFIG_CONFIG): 663 @echo >&2 '***' 664 @echo >&2 '*** Configuration file "$@" not found!' 665 @echo >&2 '***' 666 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 667 @echo >&2 '*** "make menuconfig" or "make xconfig").' 668 @echo >&2 '***' 669 @/bin/false 670 671# The actual configuration files used during the build are stored in 672# include/generated/ and include/config/. Update them if .config is newer than 673# include/config/auto.conf (which mirrors .config). 674# 675# This exploits the 'multi-target pattern rule' trick. 676# The syncconfig should be executed only once to make all the targets. 677%/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG) 678 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 679else # !may-sync-config 680# External modules and some install targets need include/generated/autoconf.h 681# and include/config/auto.conf but do not care if they are up-to-date. 682# Use auto.conf to trigger the test 683PHONY += include/config/auto.conf 684 685include/config/auto.conf: 686 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 687 echo >&2; \ 688 echo >&2 " ERROR: Kernel configuration is invalid."; \ 689 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 690 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 691 echo >&2 ; \ 692 /bin/false) 693 694endif # may-sync-config 695endif # need-config 696 697KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 698KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 699KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 700KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 701KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 702 703ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 704KBUILD_CFLAGS += -O2 705else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 706KBUILD_CFLAGS += -O3 707else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 708KBUILD_CFLAGS += -Os 709endif 710 711ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 712KBUILD_CFLAGS += -Wno-maybe-uninitialized 713endif 714 715# Tell gcc to never replace conditional load with a non-conditional one 716KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 717 718include scripts/Makefile.kcov 719include scripts/Makefile.gcc-plugins 720 721ifdef CONFIG_READABLE_ASM 722# Disable optimizations that make assembler listings hard to read. 723# reorder blocks reorders the control in the function 724# ipa clone creates specialized cloned functions 725# partial inlining inlines only parts of functions 726KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 727 $(call cc-option,-fno-ipa-cp-clone,) \ 728 $(call cc-option,-fno-partial-inlining) 729endif 730 731ifneq ($(CONFIG_FRAME_WARN),0) 732KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 733endif 734 735stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 736stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 737stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 738 739KBUILD_CFLAGS += $(stackp-flags-y) 740 741ifdef CONFIG_CC_IS_CLANG 742KBUILD_CPPFLAGS += -Qunused-arguments 743KBUILD_CFLAGS += -Wno-format-invalid-specifier 744KBUILD_CFLAGS += -Wno-gnu 745# Quiet clang warning: comparison of unsigned expression < 0 is always false 746KBUILD_CFLAGS += -Wno-tautological-compare 747# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 748# source of a reference will be _MergedGlobals and not on of the whitelisted names. 749# See modpost pattern 2 750KBUILD_CFLAGS += -mno-global-merge 751else 752 753# These warnings generated too much noise in a regular build. 754# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 755KBUILD_CFLAGS += -Wno-unused-but-set-variable 756 757# Warn about unmarked fall-throughs in switch statement. 758# Disabled for clang while comment to attribute conversion happens and 759# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 760KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 761endif 762 763KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 764ifdef CONFIG_FRAME_POINTER 765KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 766else 767# Some targets (ARM with Thumb2, for example), can't be built with frame 768# pointers. For those, we don't have FUNCTION_TRACER automatically 769# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 770# incompatible with -fomit-frame-pointer with current GCC, so we don't use 771# -fomit-frame-pointer with FUNCTION_TRACER. 772ifndef CONFIG_FUNCTION_TRACER 773KBUILD_CFLAGS += -fomit-frame-pointer 774endif 775endif 776 777# Initialize all stack variables with a pattern, if desired. 778ifdef CONFIG_INIT_STACK_ALL 779KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 780endif 781 782DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 783 784ifdef CONFIG_DEBUG_INFO 785ifdef CONFIG_DEBUG_INFO_SPLIT 786DEBUG_CFLAGS += -gsplit-dwarf 787else 788DEBUG_CFLAGS += -g 789endif 790KBUILD_AFLAGS += -Wa,-gdwarf-2 791endif 792ifdef CONFIG_DEBUG_INFO_DWARF4 793DEBUG_CFLAGS += -gdwarf-4 794endif 795 796ifdef CONFIG_DEBUG_INFO_REDUCED 797DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 798 $(call cc-option,-fno-var-tracking) 799endif 800 801KBUILD_CFLAGS += $(DEBUG_CFLAGS) 802export DEBUG_CFLAGS 803 804ifdef CONFIG_FUNCTION_TRACER 805ifdef CONFIG_FTRACE_MCOUNT_RECORD 806 # gcc 5 supports generating the mcount tables directly 807 ifeq ($(call cc-option-yn,-mrecord-mcount),y) 808 CC_FLAGS_FTRACE += -mrecord-mcount 809 export CC_USING_RECORD_MCOUNT := 1 810 endif 811 ifdef CONFIG_HAVE_NOP_MCOUNT 812 ifeq ($(call cc-option-yn, -mnop-mcount),y) 813 CC_FLAGS_FTRACE += -mnop-mcount 814 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 815 endif 816 endif 817endif 818ifdef CONFIG_HAVE_FENTRY 819 ifeq ($(call cc-option-yn, -mfentry),y) 820 CC_FLAGS_FTRACE += -mfentry 821 CC_FLAGS_USING += -DCC_USING_FENTRY 822 endif 823endif 824export CC_FLAGS_FTRACE 825KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 826KBUILD_AFLAGS += $(CC_FLAGS_USING) 827ifdef CONFIG_DYNAMIC_FTRACE 828 ifdef CONFIG_HAVE_C_RECORDMCOUNT 829 BUILD_C_RECORDMCOUNT := y 830 export BUILD_C_RECORDMCOUNT 831 endif 832endif 833endif 834 835# We trigger additional mismatches with less inlining 836ifdef CONFIG_DEBUG_SECTION_MISMATCH 837KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 838endif 839 840ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 841KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 842LDFLAGS_vmlinux += --gc-sections 843endif 844 845ifdef CONFIG_LIVEPATCH 846KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 847endif 848 849# arch Makefile may override CC so keep this after arch Makefile is included 850NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 851 852# warn about C99 declaration after statement 853KBUILD_CFLAGS += -Wdeclaration-after-statement 854 855# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 856KBUILD_CFLAGS += -Wvla 857 858# disable pointer signed / unsigned warnings in gcc 4.0 859KBUILD_CFLAGS += -Wno-pointer-sign 860 861# disable stringop warnings in gcc 8+ 862KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 863 864# disable invalid "can't wrap" optimizations for signed / pointers 865KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 866 867# clang sets -fmerge-all-constants by default as optimization, but this 868# is non-conforming behavior for C and in fact breaks the kernel, so we 869# need to disable it here generally. 870KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 871 872# for gcc -fno-merge-all-constants disables everything, but it is fine 873# to have actual conforming behavior enabled. 874KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 875 876# Make sure -fstack-check isn't enabled (like gentoo apparently did) 877KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 878 879# conserve stack if available 880KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 881 882# Prohibit date/time macros, which would make the build non-deterministic 883KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 884 885# enforce correct pointer usage 886KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 887 888# Require designated initializers for all marked structures 889KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 890 891# change __FILE__ to the relative path from the srctree 892KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 893 894# ensure -fcf-protection is disabled when using retpoline as it is 895# incompatible with -mindirect-branch=thunk-extern 896ifdef CONFIG_RETPOLINE 897KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 898endif 899 900include scripts/Makefile.kasan 901include scripts/Makefile.extrawarn 902include scripts/Makefile.ubsan 903 904# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 905KBUILD_CPPFLAGS += $(KCPPFLAGS) 906KBUILD_AFLAGS += $(KAFLAGS) 907KBUILD_CFLAGS += $(KCFLAGS) 908 909KBUILD_LDFLAGS_MODULE += --build-id 910LDFLAGS_vmlinux += --build-id 911 912ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 913LDFLAGS_vmlinux += $(call ld-option, -X,) 914endif 915 916ifeq ($(CONFIG_RELR),y) 917LDFLAGS_vmlinux += --pack-dyn-relocs=relr 918endif 919 920# make the checker run with the right architecture 921CHECKFLAGS += --arch=$(ARCH) 922 923# insure the checker run with the right endianness 924CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 925 926# the checker needs the correct machine size 927CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 928 929# Default kernel image to build when no specific target is given. 930# KBUILD_IMAGE may be overruled on the command line or 931# set in the environment 932# Also any assignments in arch/$(ARCH)/Makefile take precedence over 933# this default value 934export KBUILD_IMAGE ?= vmlinux 935 936# 937# INSTALL_PATH specifies where to place the updated kernel and system map 938# images. Default is /boot, but you can set it to other values 939export INSTALL_PATH ?= /boot 940 941# 942# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 943# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 944# an argument if needed. Otherwise it defaults to the kernel install path 945# 946export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 947 948# 949# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 950# relocations required by build roots. This is not defined in the 951# makefile but the argument can be passed to make if needed. 952# 953 954MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 955export MODLIB 956 957# 958# INSTALL_MOD_STRIP, if defined, will cause modules to be 959# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 960# the default option --strip-debug will be used. Otherwise, 961# INSTALL_MOD_STRIP value will be used as the options to the strip command. 962 963ifdef INSTALL_MOD_STRIP 964ifeq ($(INSTALL_MOD_STRIP),1) 965mod_strip_cmd = $(STRIP) --strip-debug 966else 967mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 968endif # INSTALL_MOD_STRIP=1 969else 970mod_strip_cmd = true 971endif # INSTALL_MOD_STRIP 972export mod_strip_cmd 973 974# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 975# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 976# or CONFIG_MODULE_COMPRESS_XZ. 977 978mod_compress_cmd = true 979ifdef CONFIG_MODULE_COMPRESS 980 ifdef CONFIG_MODULE_COMPRESS_GZIP 981 mod_compress_cmd = gzip -n -f 982 endif # CONFIG_MODULE_COMPRESS_GZIP 983 ifdef CONFIG_MODULE_COMPRESS_XZ 984 mod_compress_cmd = xz -f 985 endif # CONFIG_MODULE_COMPRESS_XZ 986endif # CONFIG_MODULE_COMPRESS 987export mod_compress_cmd 988 989ifdef CONFIG_MODULE_SIG_ALL 990$(eval $(call config_filename,MODULE_SIG_KEY)) 991 992mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 993else 994mod_sign_cmd = true 995endif 996export mod_sign_cmd 997 998HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 999 1000ifdef CONFIG_STACK_VALIDATION
1001 has_libelf := $(call try-run,\ 1002 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 1003 ifeq ($(has_libelf),1) 1004 objtool_target := tools/objtool FORCE 1005 else 1006 SKIP_STACK_VALIDATION := 1 1007 export SKIP_STACK_VALIDATION 1008 endif 1009endif 1010 1011PHONY += prepare0 1012 1013export MODORDER := $(extmod-prefix)modules.order 1014export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps 1015 1016ifeq ($(KBUILD_EXTMOD),) 1017core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 1018 1019vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 1020 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 1021 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 1022 1023vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 1024 $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 1025 $(drivers-) $(net-) $(libs-) $(virt-)))) 1026 1027build-dirs := $(vmlinux-dirs) 1028clean-dirs := $(vmlinux-alldirs) 1029 1030init-y := $(patsubst %/, %/built-in.a, $(init-y)) 1031core-y := $(patsubst %/, %/built-in.a, $(core-y)) 1032drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1033net-y := $(patsubst %/, %/built-in.a, $(net-y)) 1034libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1035libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 1036virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 1037 1038# Externally visible symbols (used by link-vmlinux.sh) 1039export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1040 $(drivers-y) $(net-y) $(virt-y) 1041export KBUILD_VMLINUX_LIBS := $(libs-y1) 1042export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1043export LDFLAGS_vmlinux 1044# used by scripts/Makefile.package 1045export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 1046 1047vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 1048 1049# Recurse until adjust_autoksyms.sh is satisfied 1050PHONY += autoksyms_recursive 1051ifdef CONFIG_TRIM_UNUSED_KSYMS 1052autoksyms_recursive: descend modules.order 1053 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1054 "$(MAKE) -f $(srctree)/Makefile vmlinux" 1055endif 1056 1057# For the kernel to actually contain only the needed exported symbols, 1058# we have to build modules as well to determine what those symbols are. 1059# (this can be evaluated only once include/config/auto.conf has been included) 1060ifdef CONFIG_TRIM_UNUSED_KSYMS 1061 KBUILD_MODULES := 1 1062endif 1063 1064autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1065 1066$(autoksyms_h): 1067 $(Q)mkdir -p $(dir $@) 1068 $(Q)touch $@ 1069 1070ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1071 1072# Final link of vmlinux with optional arch pass after final link 1073cmd_link-vmlinux = \ 1074 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1075 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1076 1077vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1078 +$(call if_changed,link-vmlinux) 1079 1080targets := vmlinux 1081 1082# The actual objects are generated when descending, 1083# make sure no implicit rule kicks in 1084$(sort $(vmlinux-deps)): descend ; 1085 1086filechk_kernel.release = \ 1087 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1088 1089# Store (new) KERNELRELEASE string in include/config/kernel.release 1090include/config/kernel.release: FORCE 1091 $(call filechk,kernel.release) 1092 1093# Additional helpers built in scripts/ 1094# Carefully list dependencies so we do not try to build scripts twice 1095# in parallel 1096PHONY += scripts 1097scripts: scripts_basic scripts_dtc 1098 $(Q)$(MAKE) $(build)=$(@) 1099 1100# Things we need to do before we recursively start building the kernel 1101# or the modules are listed in "prepare". 1102# A multi level approach is used. prepareN is processed before prepareN-1. 1103# archprepare is used in arch Makefiles and when processed asm symlink, 1104# version.h and scripts_basic is processed / created. 1105 1106PHONY += prepare archprepare 1107 1108archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 1109 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h 1110 1111prepare0: archprepare 1112 $(Q)$(MAKE) $(build)=scripts/mod 1113 $(Q)$(MAKE) $(build)=. 1114 1115# All the preparing.. 1116prepare: prepare0 prepare-objtool 1117 1118# Support for using generic headers in asm-generic 1119asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1120 1121PHONY += asm-generic uapi-asm-generic 1122asm-generic: uapi-asm-generic 1123 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1124 generic=include/asm-generic 1125uapi-asm-generic: 1126 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1127 generic=include/uapi/asm-generic 1128 1129PHONY += prepare-objtool 1130prepare-objtool: $(objtool_target) 1131ifeq ($(SKIP_STACK_VALIDATION),1) 1132ifdef CONFIG_UNWINDER_ORC 1133 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1134 @false 1135else 1136 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1137endif 1138endif 1139 1140# Generate some files 1141# --------------------------------------------------------------------------- 1142 1143# KERNELRELEASE can change from a few different places, meaning version.h 1144# needs to be updated, so this check is forced on all builds 1145 1146uts_len := 64 1147define filechk_utsrelease.h 1148 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1149 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1150 exit 1; \ 1151 fi; \ 1152 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1153endef 1154 1155define filechk_version.h 1156 echo \#define LINUX_VERSION_CODE $(shell \ 1157 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1158 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 1159endef 1160 1161$(version_h): FORCE 1162 $(call filechk,version.h) 1163 $(Q)rm -f $(old_version_h) 1164 1165include/generated/utsrelease.h: include/config/kernel.release FORCE 1166 $(call filechk,utsrelease.h) 1167 1168PHONY += headerdep 1169headerdep: 1170 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1171 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1172 1173# --------------------------------------------------------------------------- 1174# Kernel headers 1175 1176#Default location for installed headers 1177export INSTALL_HDR_PATH = $(objtree)/usr 1178 1179quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1180 cmd_headers_install = \ 1181 mkdir -p $(INSTALL_HDR_PATH); \ 1182 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1183 usr/include $(INSTALL_HDR_PATH) 1184 1185PHONY += headers_install 1186headers_install: headers 1187 $(call cmd,headers_install) 1188 1189PHONY += archheaders archscripts 1190 1191hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1192 1193PHONY += headers 1194headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 1195 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1196 $(error Headers not exportable for the $(SRCARCH) architecture)) 1197 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1198 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1199 1200# Deprecated. It is no-op now. 1201PHONY += headers_check 1202headers_check: 1203 @: 1204 1205ifdef CONFIG_HEADERS_INSTALL 1206prepare: headers 1207endif 1208 1209PHONY += scripts_unifdef 1210scripts_unifdef: scripts_basic 1211 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1212 1213# --------------------------------------------------------------------------- 1214# Kernel selftest 1215 1216PHONY += kselftest 1217kselftest: 1218 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1219 1220kselftest-%: FORCE 1221 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1222 1223PHONY += kselftest-merge 1224kselftest-merge: 1225 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1226 $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1227 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1228 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1229 1230# --------------------------------------------------------------------------- 1231# Devicetree files 1232 1233ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1234dtstree := arch/$(SRCARCH)/boot/dts 1235endif 1236 1237ifneq ($(dtstree),) 1238 1239%.dtb: include/config/kernel.release scripts_dtc 1240 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1241 1242PHONY += dtbs dtbs_install dtbs_check 1243dtbs dtbs_check: include/config/kernel.release scripts_dtc 1244 $(Q)$(MAKE) $(build)=$(dtstree) 1245 1246dtbs_check: export CHECK_DTBS=1 1247dtbs_check: dt_binding_check 1248 1249dtbs_install: 1250 $(Q)$(MAKE) $(dtbinst)=$(dtstree) 1251 1252ifdef CONFIG_OF_EARLY_FLATTREE 1253all: dtbs 1254endif 1255 1256endif 1257 1258PHONY += scripts_dtc 1259scripts_dtc: scripts_basic 1260 $(Q)$(MAKE) $(build)=scripts/dtc 1261 1262PHONY += dt_binding_check 1263dt_binding_check: scripts_dtc 1264 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1265 1266# --------------------------------------------------------------------------- 1267# Modules 1268 1269ifdef CONFIG_MODULES 1270 1271# By default, build modules as well 1272 1273all: modules 1274 1275# Build modules 1276# 1277# A module can be listed more than once in obj-m resulting in 1278# duplicate lines in modules.order files. Those are removed 1279# using awk while concatenating to the final file. 1280 1281PHONY += modules 1282modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order 1283 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1284 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 1285 1286modules.order: descend 1287 $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1288 1289# Target to prepare building external modules 1290PHONY += modules_prepare 1291modules_prepare: prepare 1292 1293# Target to install modules 1294PHONY += modules_install 1295modules_install: _modinst_ _modinst_post 1296 1297PHONY += _modinst_ 1298_modinst_: 1299 @rm -rf $(MODLIB)/kernel 1300 @rm -f $(MODLIB)/source 1301 @mkdir -p $(MODLIB)/kernel 1302 @ln -s $(abspath $(srctree)) $(MODLIB)/source 1303 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1304 rm -f $(MODLIB)/build ; \ 1305 ln -s $(CURDIR) $(MODLIB)/build ; \ 1306 fi 1307 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 1308 @cp -f modules.builtin $(MODLIB)/ 1309 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1310 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1311 1312# This depmod is only for convenience to give the initial 1313# boot a modules.dep even before / is mounted read-write. However the 1314# boot script depmod is the master version. 1315PHONY += _modinst_post 1316_modinst_post: _modinst_ 1317 $(call cmd,depmod) 1318 1319ifeq ($(CONFIG_MODULE_SIG), y) 1320PHONY += modules_sign 1321modules_sign: 1322 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1323endif 1324 1325else # CONFIG_MODULES 1326 1327# Modules not configured 1328# --------------------------------------------------------------------------- 1329 1330PHONY += modules modules_install 1331modules modules_install: 1332 @echo >&2 1333 @echo >&2 "The present kernel configuration has modules disabled." 1334 @echo >&2 "Type 'make config' and enable loadable module support." 1335 @echo >&2 "Then build a kernel with module support enabled." 1336 @echo >&2 1337 @exit 1 1338 1339endif # CONFIG_MODULES 1340 1341### 1342# Cleaning is done on three levels. 1343# make clean Delete most generated files 1344# Leave enough to build external modules 1345# make mrproper Delete the current configuration, and all generated files 1346# make distclean Remove editor backup files, patch leftover files and the like 1347 1348# Directories & files removed with 'make clean' 1349CLEAN_DIRS += include/ksym 1350CLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps 1351 1352# Directories & files removed with 'make mrproper' 1353MRPROPER_DIRS += include/config include/generated \ 1354 arch/$(SRCARCH)/include/generated .tmp_objdiff \ 1355 debian/ snap/ tar-install/ 1356MRPROPER_FILES += .config .config.old .version \ 1357 Module.symvers \ 1358 signing_key.pem signing_key.priv signing_key.x509 \ 1359 x509.genkey extra_certificates signing_key.x509.keyid \ 1360 signing_key.x509.signer vmlinux-gdb.py \ 1361 *.spec 1362 1363# Directories & files removed with 'make distclean' 1364DISTCLEAN_DIRS += 1365DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 1366 1367# clean - Delete most, but leave enough to build external modules 1368# 1369clean: rm-dirs := $(CLEAN_DIRS) 1370clean: rm-files := $(CLEAN_FILES) 1371 1372PHONY += archclean vmlinuxclean 1373 1374vmlinuxclean: 1375 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1376 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1377 1378clean: archclean vmlinuxclean 1379 1380# mrproper - Delete all generated files, including .config 1381# 1382mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1383mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1384mrproper-dirs := $(addprefix _mrproper_,scripts) 1385 1386PHONY += $(mrproper-dirs) mrproper 1387$(mrproper-dirs): 1388 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1389 1390mrproper: clean $(mrproper-dirs) 1391 $(call cmd,rmdirs) 1392 $(call cmd,rmfiles) 1393 1394# distclean 1395# 1396distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) 1397distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 1398 1399PHONY += distclean 1400 1401distclean: mrproper 1402 $(call cmd,rmdirs) 1403 $(call cmd,rmfiles) 1404 @find $(srctree) $(RCS_FIND_IGNORE) \ 1405 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1406 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1407 -o -name 'core' \) \ 1408 -type f -print | xargs rm -f 1409 1410 1411# Packaging of the kernel to various formats 1412# --------------------------------------------------------------------------- 1413 1414%src-pkg: FORCE 1415 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1416%pkg: include/config/kernel.release FORCE 1417 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1418 1419# Brief documentation of the typical targets used 1420# --------------------------------------------------------------------------- 1421 1422boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1423boards := $(sort $(notdir $(boards))) 1424board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1425board-dirs := $(sort $(notdir $(board-dirs:/=))) 1426 1427PHONY += help 1428help: 1429 @echo 'Cleaning targets:' 1430 @echo ' clean - Remove most generated files but keep the config and' 1431 @echo ' enough build support to build external modules' 1432 @echo ' mrproper - Remove all generated files + config + various backup files' 1433 @echo ' distclean - mrproper + remove editor backup and patch files' 1434 @echo '' 1435 @echo 'Configuration targets:' 1436 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1437 @echo '' 1438 @echo 'Other generic targets:' 1439 @echo ' all - Build all targets marked with [*]' 1440 @echo '* vmlinux - Build the bare kernel' 1441 @echo '* modules - Build all modules' 1442 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1443 @echo ' dir/ - Build all files in dir and below' 1444 @echo ' dir/file.[ois] - Build specified target only' 1445 @echo ' dir/file.ll - Build the LLVM assembly file' 1446 @echo ' (requires compiler support for LLVM assembly generation)' 1447 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1448 @echo ' (requires a recent binutils and recent build (System.map))' 1449 @echo ' dir/file.ko - Build module including final link' 1450 @echo ' modules_prepare - Set up for building external modules' 1451 @echo ' tags/TAGS - Generate tags file for editors' 1452 @echo ' cscope - Generate cscope index' 1453 @echo ' gtags - Generate GNU GLOBAL index' 1454 @echo ' kernelrelease - Output the release version string (use with make -s)' 1455 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1456 @echo ' image_name - Output the image name (use with make -s)' 1457 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1458 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1459 echo '' 1460 @echo 'Static analysers:' 1461 @echo ' checkstack - Generate a list of stack hogs' 1462 @echo ' namespacecheck - Name space analysis on compiled kernel' 1463 @echo ' versioncheck - Sanity check on version.h usage' 1464 @echo ' includecheck - Check for duplicate included header files' 1465 @echo ' export_report - List the usages of all exported symbols' 1466 @echo ' headerdep - Detect inclusion cycles in headers' 1467 @echo ' coccicheck - Check with Coccinelle' 1468 @echo '' 1469 @echo 'Tools:' 1470 @echo ' nsdeps - Generate missing symbol namespace dependencies' 1471 @echo '' 1472 @echo 'Kernel selftest:' 1473 @echo ' kselftest - Build and run kernel selftest (run as root)' 1474 @echo ' Build, install, and boot kernel before' 1475 @echo ' running kselftest on it' 1476 @echo ' kselftest-clean - Remove all generated kselftest files' 1477 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1478 @echo ' .config.' 1479 @echo '' 1480 @$(if $(dtstree), \ 1481 echo 'Devicetree:'; \ 1482 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1483 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1484 echo ' dt_binding_check - Validate device tree binding documents'; \ 1485 echo ' dtbs_check - Validate device tree source files';\ 1486 echo '') 1487 1488 @echo 'Userspace tools targets:' 1489 @echo ' use "make tools/help"' 1490 @echo ' or "cd tools; make help"' 1491 @echo '' 1492 @echo 'Kernel packaging:' 1493 @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1494 @echo '' 1495 @echo 'Documentation targets:' 1496 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1497 @echo '' 1498 @echo 'Architecture specific targets ($(SRCARCH)):' 1499 @$(if $(archhelp),$(archhelp),\ 1500 echo ' No architecture specific help defined for $(SRCARCH)') 1501 @echo '' 1502 @$(if $(boards), \ 1503 $(foreach b, $(boards), \ 1504 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1505 echo '') 1506 @$(if $(board-dirs), \ 1507 $(foreach b, $(board-dirs), \ 1508 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1509 printf " %-16s - Show all of the above\\n" help-boards; \ 1510 echo '') 1511 1512 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1513 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1514 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1515 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1516 @echo ' (sparse by default)' 1517 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1518 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1519 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 1520 @echo ' 1: warnings which may be relevant and do not occur too often' 1521 @echo ' 2: warnings which occur quite often but may still be relevant' 1522 @echo ' 3: more obscure warnings, can most likely be ignored' 1523 @echo ' Multiple levels can be combined with W=12 or W=123' 1524 @echo '' 1525 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1526 @echo 'For further info see the ./README file' 1527 1528 1529help-board-dirs := $(addprefix help-,$(board-dirs)) 1530 1531help-boards: $(help-board-dirs) 1532 1533boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1534 1535$(help-board-dirs): help-%: 1536 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1537 @$(if $(boards-per-dir), \ 1538 $(foreach b, $(boards-per-dir), \ 1539 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1540 echo '') 1541 1542 1543# Documentation targets 1544# --------------------------------------------------------------------------- 1545DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1546 linkcheckdocs dochelp refcheckdocs 1547PHONY += $(DOC_TARGETS) 1548$(DOC_TARGETS): 1549 $(Q)$(MAKE) $(build)=Documentation $@ 1550 1551# Misc 1552# --------------------------------------------------------------------------- 1553 1554PHONY += scripts_gdb 1555scripts_gdb: prepare0 1556 $(Q)$(MAKE) $(build)=scripts/gdb 1557 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1558 1559ifdef CONFIG_GDB_SCRIPTS 1560all: scripts_gdb 1561endif 1562 1563else # KBUILD_EXTMOD 1564 1565### 1566# External module support. 1567# When building external modules the kernel used as basis is considered 1568# read-only, and no consistency checks are made and the make 1569# system is not used on the basis kernel. If updates are required 1570# in the basis kernel ordinary make commands (without M=...) must 1571# be used. 1572# 1573# The following are the only valid targets when building external 1574# modules. 1575# make M=dir clean Delete all automatically generated files 1576# make M=dir modules Make all modules in specified dir 1577# make M=dir Same as 'make M=dir modules' 1578# make M=dir modules_install 1579# Install the modules built in the module directory 1580# Assumes install directory is already created 1581 1582# We are always building modules 1583KBUILD_MODULES := 1 1584 1585PHONY += $(objtree)/Module.symvers 1586$(objtree)/Module.symvers: 1587 @test -e $(objtree)/Module.symvers || ( \ 1588 echo; \ 1589 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1590 echo " is missing; modules will have no dependencies and modversions."; \ 1591 echo ) 1592 1593build-dirs := $(KBUILD_EXTMOD) 1594PHONY += modules 1595modules: descend $(objtree)/Module.symvers 1596 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1597 1598PHONY += modules_install 1599modules_install: _emodinst_ _emodinst_post 1600 1601install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1602PHONY += _emodinst_ 1603_emodinst_: 1604 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1605 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1606 1607PHONY += _emodinst_post 1608_emodinst_post: _emodinst_ 1609 $(call cmd,depmod) 1610 1611clean-dirs := $(KBUILD_EXTMOD) 1612clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps 1613 1614PHONY += / 1615/: 1616 @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' 1617 1618PHONY += help 1619help: 1620 @echo ' Building external modules.' 1621 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1622 @echo '' 1623 @echo ' modules - default target, build the module(s)' 1624 @echo ' modules_install - install the module' 1625 @echo ' clean - remove generated files in module directory only' 1626 @echo '' 1627 1628PHONY += prepare 1629endif # KBUILD_EXTMOD 1630 1631# Single targets 1632# --------------------------------------------------------------------------- 1633# To build individual files in subdirectories, you can do like this: 1634# 1635# make foo/bar/baz.s 1636# 1637# The supported suffixes for single-target are listed in 'single-targets' 1638# 1639# To build only under specific subdirectories, you can do like this: 1640# 1641# make foo/bar/baz/ 1642 1643ifdef single-build 1644 1645# .ko is special because modpost is needed 1646single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1647single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1648 1649$(single-ko): single_modpost 1650 @: 1651$(single-no-ko): descend 1652 @: 1653 1654ifeq ($(KBUILD_EXTMOD),) 1655# For the single build of in-tree modules, use a temporary file to avoid 1656# the situation of modules_install installing an invalid modules.order. 1657MODORDER := .modules.tmp 1658endif 1659 1660PHONY += single_modpost 1661single_modpost: $(single-no-ko) 1662 $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 1663 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1664 1665KBUILD_MODULES := 1 1666 1667export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1668 1669# trim unrelated directories 1670build-dirs := $(foreach d, $(build-dirs), \ 1671 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1672 1673endif 1674 1675# Handle descending into subdirectories listed in $(build-dirs) 1676# Preset locale variables to speed up the build process. Limit locale 1677# tweaks to this spot to avoid wrong language settings when running 1678# make menuconfig etc. 1679# Error messages still appears in the original language 1680PHONY += descend $(build-dirs) 1681descend: $(build-dirs) 1682$(build-dirs): prepare 1683 $(Q)$(MAKE) $(build)=$@ \ 1684 single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \ 1685 need-builtin=1 need-modorder=1 1686 1687clean-dirs := $(addprefix _clean_, $(clean-dirs)) 1688PHONY += $(clean-dirs) clean 1689$(clean-dirs): 1690 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1691 1692clean: $(clean-dirs) 1693 $(call cmd,rmdirs) 1694 $(call cmd,rmfiles) 1695 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1696 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1697 -o -name '*.ko.*' \ 1698 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1699 -o -name '*.dwo' -o -name '*.lst' \ 1700 -o -name '*.su' -o -name '*.mod' \ 1701 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1702 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1703 -o -name '*.asn1.[ch]' \ 1704 -o -name '*.symtypes' -o -name 'modules.order' \ 1705 -o -name '.tmp_*.o.*' \ 1706 -o -name '*.c.[012]*.*' \ 1707 -o -name '*.ll' \ 1708 -o -name '*.gcno' \) -type f -print | xargs rm -f 1709 1710# Generate tags for editors 1711# --------------------------------------------------------------------------- 1712quiet_cmd_tags = GEN $@ 1713 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 1714 1715tags TAGS cscope gtags: FORCE 1716 $(call cmd,tags) 1717 1718# Script to generate missing namespace dependencies 1719# --------------------------------------------------------------------------- 1720 1721PHONY += nsdeps 1722nsdeps: export KBUILD_NSDEPS=1 1723nsdeps: modules 1724 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1725 1726# Scripts to check various things for consistency 1727# --------------------------------------------------------------------------- 1728 1729PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1730 1731includecheck: 1732 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1733 -name '*.[hcS]' -type f -print | sort \ 1734 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1735 1736versioncheck: 1737 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1738 -name '*.[hcS]' -type f -print | sort \ 1739 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1740 1741coccicheck: 1742 $(Q)$(BASH) $(srctree)/scripts/$@ 1743 1744namespacecheck: 1745 $(PERL) $(srctree)/scripts/namespace.pl 1746 1747export_report: 1748 $(PERL) $(srctree)/scripts/export_report.pl 1749 1750PHONY += checkstack kernelrelease kernelversion image_name 1751 1752# UML needs a little special treatment here. It wants to use the host 1753# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1754# else wants $(ARCH), including people doing cross-builds, which means 1755# that $(SUBARCH) doesn't work here. 1756ifeq ($(ARCH), um) 1757CHECKSTACK_ARCH := $(SUBARCH) 1758else 1759CHECKSTACK_ARCH := $(ARCH) 1760endif 1761checkstack: 1762 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1763 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1764 1765kernelrelease: 1766 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1767 1768kernelversion: 1769 @echo $(KERNELVERSION) 1770 1771image_name: 1772 @echo $(KBUILD_IMAGE) 1773 1774# Clear a bunch of variables before executing the submake 1775 1776ifeq ($(quiet),silent_) 1777tools_silent=s 1778endif 1779 1780tools/: FORCE 1781 $(Q)mkdir -p $(objtree)/tools 1782 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1783 1784tools/%: FORCE 1785 $(Q)mkdir -p $(objtree)/tools 1786 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1787 1788# FIXME Should go into a make.lib or something 1789# =========================================================================== 1790 1791quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1792 cmd_rmdirs = rm -rf $(rm-dirs) 1793 1794quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1795 cmd_rmfiles = rm -f $(rm-files) 1796 1797# Run depmod only if we have System.map and depmod is executable 1798quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1799 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1800 $(KERNELRELEASE) 1801 1802# read saved command lines for existing targets 1803existing-targets := $(wildcard $(sort $(targets))) 1804 1805-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1806 1807endif # config-build 1808endif # mixed-build 1809endif # need-sub-make 1810 1811PHONY += FORCE 1812FORCE: 1813 1814# Declare the contents of the PHONY variable as phony. We keep that 1815# information in a variable so we can use it in if_changed and friends. 1816.PHONY: $(PHONY) 1817