1# SPDX-License-Identifier: GPL-2.0 2VERSION = 5 3PATCHLEVEL = 4 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 $@ :< 68# 69# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 70# If KBUILD_VERBOSE equals 1 then the above command is displayed. 71# 72# To put more focus on warnings, be less verbose as default 73# Use 'make V=1' to see the full commands 74 75ifeq ("$(origin V)", "command line") 76 KBUILD_VERBOSE = $(V) 77endif 78ifndef KBUILD_VERBOSE 79 KBUILD_VERBOSE = 0 80endif 81 82ifeq ($(KBUILD_VERBOSE),1) 83 quiet = 84 Q = 85else 86 quiet=quiet_ 87 Q = @ 88endif 89 90# If the user is running make -s (silent mode), suppress echoing of 91# commands 92 93ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 94 quiet=silent_ 95endif 96 97export quiet Q KBUILD_VERBOSE 98 99# Kbuild will save output files in the current working directory. 100# This does not need to match to the root of the kernel source tree. 101# 102# For example, you can do this: 103# 104# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 105# 106# If you want to save output files in a different location, there are 107# two syntaxes to specify it. 108# 109# 1) O= 110# Use "make O=dir/to/store/output/files/" 111# 112# 2) Set KBUILD_OUTPUT 113# Set the environment variable KBUILD_OUTPUT to point to the output directory. 114# export KBUILD_OUTPUT=dir/to/store/output/files/; make 115# 116# The O= assignment takes precedence over the KBUILD_OUTPUT environment 117# variable. 118 119# Do we want to change the working directory? 120ifeq ("$(origin O)", "command line") 121 KBUILD_OUTPUT := $(O) 122endif 123 124ifneq ($(KBUILD_OUTPUT),) 125# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 126# expand a shell special character '~'. We use a somewhat tedious way here. 127abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 128$(if $(abs_objtree),, \ 129 $(error failed to create output directory "$(KBUILD_OUTPUT)")) 130 131# $(realpath ...) resolves symlinks 132abs_objtree := $(realpath $(abs_objtree)) 133else 134abs_objtree := $(CURDIR) 135endif # ifneq ($(KBUILD_OUTPUT),) 136 137ifeq ($(abs_objtree),$(CURDIR)) 138# Suppress "Entering directory ..." unless we are changing the work directory. 139MAKEFLAGS += --no-print-directory 140else 141need-sub-make := 1 142endif 143 144abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 145 146ifneq ($(words $(subst :, ,$(abs_srctree))), 1) 147$(error source directory cannot contain spaces or colons) 148endif 149 150ifneq ($(abs_srctree),$(abs_objtree)) 151# Look for make include files relative to root of kernel src 152# 153# This does not become effective immediately because MAKEFLAGS is re-parsed 154# once after the Makefile is read. We need to invoke sub-make. 155MAKEFLAGS += --include-dir=$(abs_srctree) 156need-sub-make := 1 157endif 158 159ifneq ($(filter 3.%,$(MAKE_VERSION)),) 160# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 161# We need to invoke sub-make to avoid implicit rules in the top Makefile. 162need-sub-make := 1 163# Cancel implicit rules for this Makefile. 164$(lastword $(MAKEFILE_LIST)): ; 165endif 166 167export abs_srctree abs_objtree 168export sub_make_done := 1 169 170ifeq ($(need-sub-make),1) 171 172PHONY += $(MAKECMDGOALS) sub-make 173 174$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make 175 @: 176 177# Invoke a second make in the output directory, passing relevant variables 178sub-make: 179 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 180 181endif # need-sub-make 182endif # sub_make_done 183 184# We process the rest of the Makefile if this is the final invocation of make 185ifeq ($(need-sub-make),) 186 187# Do not print "Entering directory ...", 188# but we want to display it when entering to the output directory 189# so that IDEs/editors are able to understand relative filenames. 190MAKEFLAGS += --no-print-directory 191 192# Call a source code checker (by default, "sparse") as part of the 193# C compilation. 194# 195# Use 'make C=1' to enable checking of only re-compiled files. 196# Use 'make C=2' to enable checking of *all* source files, regardless 197# of whether they are re-compiled or not. 198# 199# See the file "Documentation/dev-tools/sparse.rst" for more details, 200# including where to get the "sparse" utility. 201 202ifeq ("$(origin C)", "command line") 203 KBUILD_CHECKSRC = $(C) 204endif 205ifndef KBUILD_CHECKSRC 206 KBUILD_CHECKSRC = 0 207endif 208 209# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the 210# directory of external module to build. Setting M= takes precedence. 211ifeq ("$(origin M)", "command line") 212 KBUILD_EXTMOD := $(M) 213endif 214 215export KBUILD_CHECKSRC KBUILD_EXTMOD 216 217extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) 218 219ifeq ($(abs_srctree),$(abs_objtree)) 220 # building in the source tree 221 srctree := . 222 building_out_of_srctree := 223else 224 ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 225 # building in a subdirectory of the source tree 226 srctree := .. 227 else 228 srctree := $(abs_srctree) 229 endif 230 building_out_of_srctree := 1 231endif 232 233ifneq ($(KBUILD_ABS_SRCTREE),) 234srctree := $(abs_srctree) 235endif 236 237objtree := . 238VPATH := $(srctree) 239 240export building_out_of_srctree srctree objtree VPATH 241 242# To make sure we do not include .config for any of the *config targets 243# catch them early, and hand them over to scripts/kconfig/Makefile 244# It is allowed to specify more targets when calling make, including 245# mixing *config targets and build targets. 246# For example 'make oldconfig all'. 247# Detect when mixed targets is specified, and make a second invocation 248# of make so .config is not included in this case either (for *config). 249 250version_h := include/generated/uapi/linux/version.h 251old_version_h := include/linux/version.h 252 253clean-targets := %clean mrproper cleandocs 254no-dot-config-targets := $(clean-targets) \ 255 cscope gtags TAGS tags help% %docs check% coccicheck \ 256 $(version_h) headers headers_% archheaders archscripts \ 257 %asm-generic kernelversion %src-pkg 258no-sync-config-targets := $(no-dot-config-targets) install %install \ 259 kernelrelease 260single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ 261 262config-build := 263mixed-build := 264need-config := 1 265may-sync-config := 1 266single-build := 267 268ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 269 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 270 need-config := 271 endif 272endif 273 274ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 275 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 276 may-sync-config := 277 endif 278endif 279 280ifneq ($(KBUILD_EXTMOD),) 281 may-sync-config := 282endif 283 284ifeq ($(KBUILD_EXTMOD),) 285 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 286 config-build := 1 287 ifneq ($(words $(MAKECMDGOALS)),1) 288 mixed-build := 1 289 endif 290 endif 291endif 292 293# We cannot build single targets and the others at the same time 294ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) 295 single-build := 1 296 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) 297 mixed-build := 1 298 endif 299endif 300 301# For "make -j clean all", "make -j mrproper defconfig all", etc. 302ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 303 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 304 mixed-build := 1 305 endif 306endif 307 308# install and modules_install need also be processed one by one 309ifneq ($(filter install,$(MAKECMDGOALS)),) 310 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 311 mixed-build := 1 312 endif 313endif 314 315ifdef mixed-build 316# =========================================================================== 317# We're called with mixed targets (*config and build targets). 318# Handle them one by one. 319 320PHONY += $(MAKECMDGOALS) __build_one_by_one 321 322$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 323 @: 324 325__build_one_by_one: 326 $(Q)set -e; \ 327 for i in $(MAKECMDGOALS); do \ 328 $(MAKE) -f $(srctree)/Makefile $$i; \ 329 done 330 331else # !mixed-build 332 333include scripts/Kbuild.include 334 335# Read KERNELRELEASE from include/config/kernel.release (if it exists) 336KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 337KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 338export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 339 340include scripts/subarch.include 341 342# Cross compiling and selecting different set of gcc/bin-utils 343# --------------------------------------------------------------------------- 344# 345# When performing cross compilation for other architectures ARCH shall be set 346# to the target architecture. (See arch/* for the possibilities). 347# ARCH can be set during invocation of make: 348# make ARCH=ia64 349# Another way is to have ARCH set in the environment. 350# The default ARCH is the host where make is executed. 351 352# CROSS_COMPILE specify the prefix used for all executables used 353# during compilation. Only gcc and related bin-utils executables 354# are prefixed with $(CROSS_COMPILE). 355# CROSS_COMPILE can be set on the command line 356# make CROSS_COMPILE=ia64-linux- 357# Alternatively CROSS_COMPILE can be set in the environment. 358# Default value for CROSS_COMPILE is not to prefix executables 359# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 360ARCH ?= $(SUBARCH) 361 362# Architecture as present in compile.h 363UTS_MACHINE := $(ARCH) 364SRCARCH := $(ARCH) 365 366# Additional ARCH settings for x86 367ifeq ($(ARCH),i386) 368 SRCARCH := x86 369endif 370ifeq ($(ARCH),x86_64) 371 SRCARCH := x86 372endif 373 374# Additional ARCH settings for sparc 375ifeq ($(ARCH),sparc32) 376 SRCARCH := sparc 377endif 378ifeq ($(ARCH),sparc64) 379 SRCARCH := sparc 380endif 381 382# Additional ARCH settings for sh 383ifeq ($(ARCH),sh64) 384 SRCARCH := sh 385endif 386 387KCONFIG_CONFIG ?= .config 388export KCONFIG_CONFIG 389 390# SHELL used by kbuild 391CONFIG_SHELL := sh 392 393HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 394HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 395HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 396 397HOSTCC = gcc 398HOSTCXX = g++ 399KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 400 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 401 $(HOSTCFLAGS) 402KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 403KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 404KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 405 406# Make variables (CC, etc...) 407AS = $(CROSS_COMPILE)as 408LD = $(CROSS_COMPILE)ld 409CC = $(CROSS_COMPILE)gcc 410CPP = $(CC) -E 411AR = $(CROSS_COMPILE)ar 412NM = $(CROSS_COMPILE)nm 413STRIP = $(CROSS_COMPILE)strip 414OBJCOPY = $(CROSS_COMPILE)objcopy 415OBJDUMP = $(CROSS_COMPILE)objdump 416OBJSIZE = $(CROSS_COMPILE)size 417PAHOLE = pahole 418LEX = flex 419YACC = bison 420AWK = awk 421INSTALLKERNEL := installkernel 422DEPMOD = /sbin/depmod 423PERL = perl 424PYTHON = python 425PYTHON2 = python2 426PYTHON3 = python3 427CHECK = sparse 428BASH = bash 429 430CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 431 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 432NOSTDINC_FLAGS := 433CFLAGS_MODULE = 434AFLAGS_MODULE = 435LDFLAGS_MODULE = 436CFLAGS_KERNEL = 437AFLAGS_KERNEL = 438LDFLAGS_vmlinux = 439 440# Use USERINCLUDE when you must reference the UAPI directories only. 441USERINCLUDE := \ 442 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 443 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 444 -I$(srctree)/include/uapi \ 445 -I$(objtree)/include/generated/uapi \ 446 -include $(srctree)/include/linux/kconfig.h 447 448# Use LINUXINCLUDE when you must reference the include/ directory. 449# Needed to be compatible with the O= option 450LINUXINCLUDE := \ 451 -I$(srctree)/arch/$(SRCARCH)/include \ 452 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 453 $(if $(building_out_of_srctree),-I$(srctree)/include) \ 454 -I$(objtree)/include \ 455 $(USERINCLUDE) 456 457KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 458KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 459 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 460 -Werror=implicit-function-declaration -Werror=implicit-int \ 461 -Wno-format-security \ 462 -std=gnu89 463KBUILD_CPPFLAGS := -D__KERNEL__ 464KBUILD_AFLAGS_KERNEL := 465KBUILD_CFLAGS_KERNEL := 466KBUILD_AFLAGS_MODULE := -DMODULE 467KBUILD_CFLAGS_MODULE := -DMODULE 468KBUILD_LDFLAGS_MODULE := 469export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds 470KBUILD_LDFLAGS := 471GCC_PLUGINS_CFLAGS := 472CLANG_FLAGS := 473 474export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 475export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL 476export PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX 477export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE 478 479export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 480export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 481export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 482export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 483export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 484export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 485 486# Files to ignore in find ... statements 487 488export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 489 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 490 -prune -o 491export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 492 --exclude CVS --exclude .pc --exclude .hg --exclude .git 493 494# =========================================================================== 495# Rules shared between *config targets and build targets 496 497# Basic helpers built in scripts/basic/ 498PHONY += scripts_basic 499scripts_basic: 500 $(Q)$(MAKE) $(build)=scripts/basic 501 $(Q)rm -f .tmp_quiet_recordmcount 502 503PHONY += outputmakefile 504# Before starting out-of-tree build, make sure the source tree is clean. 505# outputmakefile generates a Makefile in the output directory, if using a 506# separate output directory. This allows convenient use of make in the 507# output directory. 508# At the same time when output Makefile generated, generate .gitignore to 509# ignore whole output directory 510outputmakefile: 511ifdef building_out_of_srctree 512 $(Q)if [ -f $(srctree)/.config -o \ 513 -d $(srctree)/include/config -o \ 514 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 515 echo >&2 "***"; \ 516 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ 517 echo >&2 "*** in $(abs_srctree)";\ 518 echo >&2 "***"; \ 519 false; \ 520 fi 521 $(Q)ln -fsn $(srctree) source 522 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 523 $(Q)test -e .gitignore || \ 524 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 525endif 526 527ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 528ifneq ($(CROSS_COMPILE),) 529CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 530GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 531CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 532GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 533endif 534ifneq ($(GCC_TOOLCHAIN),) 535CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 536endif 537ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) 538CLANG_FLAGS += -no-integrated-as 539endif 540CLANG_FLAGS += -Werror=unknown-warning-option 541KBUILD_CFLAGS += $(CLANG_FLAGS) 542KBUILD_AFLAGS += $(CLANG_FLAGS) 543export CLANG_FLAGS 544endif 545 546# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 547# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 548# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 549# and from include/config/auto.conf.cmd to detect the compiler upgrade. 550CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 551 552ifdef config-build 553# =========================================================================== 554# *config targets only - make sure prerequisites are updated, and descend 555# in scripts/kconfig to make the *config target 556 557# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 558# KBUILD_DEFCONFIG may point out an alternative default configuration 559# used for 'make defconfig' 560include arch/$(SRCARCH)/Makefile 561export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 562 563config: outputmakefile scripts_basic FORCE 564 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 565 566%config: outputmakefile scripts_basic FORCE 567 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 568 569else #!config-build 570# =========================================================================== 571# Build targets only - this includes vmlinux, arch specific targets, clean 572# targets and others. In general all targets except *config targets. 573 574# If building an external module we do not care about the all: rule 575# but instead _all depend on modules 576PHONY += all 577ifeq ($(KBUILD_EXTMOD),) 578_all: all 579else 580_all: modules 581endif 582 583# Decide whether to build built-in, modular, or both. 584# Normally, just do built-in. 585 586KBUILD_MODULES := 587KBUILD_BUILTIN := 1 588 589# If we have only "make modules", don't compile built-in objects. 590# When we're building modules with modversions, we need to consider 591# the built-in objects during the descend as well, in order to 592# make sure the checksums are up to date before we record them. 593 594ifeq ($(MAKECMDGOALS),modules) 595 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 596endif 597 598# If we have "make <whatever> modules", compile modules 599# in addition to whatever we do anyway. 600# Just "make" or "make all" shall build modules as well 601 602ifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),) 603 KBUILD_MODULES := 1 604endif 605 606ifeq ($(MAKECMDGOALS),) 607 KBUILD_MODULES := 1 608endif 609 610export KBUILD_MODULES KBUILD_BUILTIN 611 612ifdef need-config 613include include/config/auto.conf 614endif 615 616ifeq ($(KBUILD_EXTMOD),) 617# Objects we will link into vmlinux / subdirs we need to visit 618init-y := init/ 619drivers-y := drivers/ sound/ 620drivers-$(CONFIG_SAMPLES) += samples/ 621drivers-$(CONFIG_KERNEL_HEADER_TEST) += include/ 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 %/tristate.conf: $(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 := $(extmod-prefix)modules.order 1014 1015ifeq ($(KBUILD_EXTMOD),) 1016core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 1017 1018vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 1019 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 1020 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 1021 1022vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 1023 $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 1024 $(drivers-) $(net-) $(libs-) $(virt-)))) 1025 1026build-dirs := $(vmlinux-dirs) 1027clean-dirs := $(vmlinux-alldirs) 1028 1029init-y := $(patsubst %/, %/built-in.a, $(init-y)) 1030core-y := $(patsubst %/, %/built-in.a, $(core-y)) 1031drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1032net-y := $(patsubst %/, %/built-in.a, $(net-y)) 1033libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1034libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 1035virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 1036 1037# Externally visible symbols (used by link-vmlinux.sh) 1038export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1039 $(drivers-y) $(net-y) $(virt-y) 1040export KBUILD_VMLINUX_LIBS := $(libs-y1) 1041export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1042export LDFLAGS_vmlinux 1043# used by scripts/Makefile.package 1044export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 1045 1046vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 1047 1048# Recurse until adjust_autoksyms.sh is satisfied 1049PHONY += autoksyms_recursive 1050ifdef CONFIG_TRIM_UNUSED_KSYMS 1051autoksyms_recursive: descend modules.order 1052 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1053 "$(MAKE) -f $(srctree)/Makefile vmlinux" 1054endif 1055 1056# For the kernel to actually contain only the needed exported symbols, 1057# we have to build modules as well to determine what those symbols are. 1058# (this can be evaluated only once include/config/auto.conf has been included) 1059ifdef CONFIG_TRIM_UNUSED_KSYMS 1060 KBUILD_MODULES := 1 1061endif 1062 1063autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1064 1065$(autoksyms_h): 1066 $(Q)mkdir -p $(dir $@) 1067 $(Q)touch $@ 1068 1069ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1070 1071# Final link of vmlinux with optional arch pass after final link 1072cmd_link-vmlinux = \ 1073 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1074 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1075 1076vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1077 +$(call if_changed,link-vmlinux) 1078 1079targets := vmlinux 1080 1081# The actual objects are generated when descending, 1082# make sure no implicit rule kicks in 1083$(sort $(vmlinux-deps)): descend ; 1084 1085filechk_kernel.release = \ 1086 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1087 1088# Store (new) KERNELRELEASE string in include/config/kernel.release 1089include/config/kernel.release: FORCE 1090 $(call filechk,kernel.release) 1091 1092# Additional helpers built in scripts/ 1093# Carefully list dependencies so we do not try to build scripts twice 1094# in parallel 1095PHONY += scripts 1096scripts: scripts_basic scripts_dtc 1097 $(Q)$(MAKE) $(build)=$(@) 1098 1099# Things we need to do before we recursively start building the kernel 1100# or the modules are listed in "prepare". 1101# A multi level approach is used. prepareN is processed before prepareN-1. 1102# archprepare is used in arch Makefiles and when processed asm symlink, 1103# version.h and scripts_basic is processed / created. 1104 1105PHONY += prepare archprepare 1106 1107archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ 1108 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h 1109 1110prepare0: archprepare 1111 $(Q)$(MAKE) $(build)=scripts/mod 1112 $(Q)$(MAKE) $(build)=. 1113 1114# All the preparing.. 1115prepare: prepare0 prepare-objtool 1116 1117# Support for using generic headers in asm-generic 1118asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1119 1120PHONY += asm-generic uapi-asm-generic 1121asm-generic: uapi-asm-generic 1122 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1123 generic=include/asm-generic 1124uapi-asm-generic: 1125 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1126 generic=include/uapi/asm-generic 1127 1128PHONY += prepare-objtool 1129prepare-objtool: $(objtool_target) 1130ifeq ($(SKIP_STACK_VALIDATION),1) 1131ifdef CONFIG_UNWINDER_ORC 1132 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1133 @false 1134else 1135 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1136endif 1137endif 1138 1139# Generate some files 1140# --------------------------------------------------------------------------- 1141 1142# KERNELRELEASE can change from a few different places, meaning version.h 1143# needs to be updated, so this check is forced on all builds 1144 1145uts_len := 64 1146define filechk_utsrelease.h 1147 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1148 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1149 exit 1; \ 1150 fi; \ 1151 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1152endef 1153 1154define filechk_version.h 1155 echo \#define LINUX_VERSION_CODE $(shell \ 1156 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1157 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 1158endef 1159 1160$(version_h): FORCE 1161 $(call filechk,version.h) 1162 $(Q)rm -f $(old_version_h) 1163 1164include/generated/utsrelease.h: include/config/kernel.release FORCE 1165 $(call filechk,utsrelease.h) 1166 1167PHONY += headerdep 1168headerdep: 1169 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1170 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1171 1172# --------------------------------------------------------------------------- 1173# Kernel headers 1174 1175#Default location for installed headers 1176export INSTALL_HDR_PATH = $(objtree)/usr 1177 1178quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1179 cmd_headers_install = \ 1180 mkdir -p $(INSTALL_HDR_PATH); \ 1181 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1182 usr/include $(INSTALL_HDR_PATH) 1183 1184PHONY += headers_install 1185headers_install: headers 1186 $(call cmd,headers_install) 1187 1188PHONY += archheaders archscripts 1189 1190hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1191 1192PHONY += headers 1193headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 1194 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1195 $(error Headers not exportable for the $(SRCARCH) architecture)) 1196 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1197 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1198 1199PHONY += headers_check 1200headers_check: headers 1201 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 1202 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1 1203 1204ifdef CONFIG_HEADERS_INSTALL 1205prepare: headers 1206endif 1207 1208ifdef CONFIG_HEADERS_CHECK 1209all: headers_check 1210endif 1211 1212PHONY += scripts_unifdef 1213scripts_unifdef: scripts_basic 1214 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1215 1216# --------------------------------------------------------------------------- 1217# Kernel selftest 1218 1219PHONY += kselftest 1220kselftest: 1221 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1222 1223kselftest-%: FORCE 1224 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1225 1226PHONY += kselftest-merge 1227kselftest-merge: 1228 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1229 $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1230 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1231 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1232 1233# --------------------------------------------------------------------------- 1234# Devicetree files 1235 1236ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1237dtstree := arch/$(SRCARCH)/boot/dts 1238endif 1239 1240ifneq ($(dtstree),) 1241 1242%.dtb: include/config/kernel.release scripts_dtc 1243 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1244 1245PHONY += dtbs dtbs_install dt_binding_check 1246dtbs dtbs_check: include/config/kernel.release scripts_dtc 1247 $(Q)$(MAKE) $(build)=$(dtstree) 1248 1249dtbs_check: export CHECK_DTBS=1 1250dtbs_check: dt_binding_check 1251 1252dtbs_install: 1253 $(Q)$(MAKE) $(dtbinst)=$(dtstree) 1254 1255ifdef CONFIG_OF_EARLY_FLATTREE 1256all: dtbs 1257endif 1258 1259endif 1260 1261PHONY += scripts_dtc 1262scripts_dtc: scripts_basic 1263 $(Q)$(MAKE) $(build)=scripts/dtc 1264 1265dt_binding_check: scripts_dtc 1266 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1267 1268# --------------------------------------------------------------------------- 1269# Modules 1270 1271ifdef CONFIG_MODULES 1272 1273# By default, build modules as well 1274 1275all: modules 1276 1277# Build modules 1278# 1279# A module can be listed more than once in obj-m resulting in 1280# duplicate lines in modules.order files. Those are removed 1281# using awk while concatenating to the final file. 1282 1283PHONY += modules 1284modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin 1285 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1286 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 1287 1288modules.order: descend 1289 $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1290 1291modbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs)) 1292 1293modules.builtin: $(modbuiltin-dirs) 1294 $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1295 1296PHONY += $(modbuiltin-dirs) 1297# tristate.conf is not included from this Makefile. Add it as a prerequisite 1298# here to make it self-healing in case somebody accidentally removes it. 1299$(modbuiltin-dirs): include/config/tristate.conf 1300 $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@) 1301 1302# Target to prepare building external modules 1303PHONY += modules_prepare 1304modules_prepare: prepare 1305 1306# Target to install modules 1307PHONY += modules_install 1308modules_install: _modinst_ _modinst_post 1309 1310PHONY += _modinst_ 1311_modinst_: 1312 @rm -rf $(MODLIB)/kernel 1313 @rm -f $(MODLIB)/source 1314 @mkdir -p $(MODLIB)/kernel 1315 @ln -s $(abspath $(srctree)) $(MODLIB)/source 1316 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1317 rm -f $(MODLIB)/build ; \ 1318 ln -s $(CURDIR) $(MODLIB)/build ; \ 1319 fi 1320 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 1321 @sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin 1322 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1323 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1324 1325# This depmod is only for convenience to give the initial 1326# boot a modules.dep even before / is mounted read-write. However the 1327# boot script depmod is the master version. 1328PHONY += _modinst_post 1329_modinst_post: _modinst_ 1330 $(call cmd,depmod) 1331 1332ifeq ($(CONFIG_MODULE_SIG), y) 1333PHONY += modules_sign 1334modules_sign: 1335 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1336endif 1337 1338else # CONFIG_MODULES 1339 1340# Modules not configured 1341# --------------------------------------------------------------------------- 1342 1343PHONY += modules modules_install 1344modules modules_install: 1345 @echo >&2 1346 @echo >&2 "The present kernel configuration has modules disabled." 1347 @echo >&2 "Type 'make config' and enable loadable module support." 1348 @echo >&2 "Then build a kernel with module support enabled." 1349 @echo >&2 1350 @exit 1 1351 1352endif # CONFIG_MODULES 1353 1354### 1355# Cleaning is done on three levels. 1356# make clean Delete most generated files 1357# Leave enough to build external modules 1358# make mrproper Delete the current configuration, and all generated files 1359# make distclean Remove editor backup files, patch leftover files and the like 1360 1361# Directories & files removed with 'make clean' 1362CLEAN_DIRS += include/ksym 1363CLEAN_FILES += modules.builtin.modinfo 1364 1365# Directories & files removed with 'make mrproper' 1366MRPROPER_DIRS += include/config include/generated \ 1367 arch/$(SRCARCH)/include/generated .tmp_objdiff \ 1368 debian/ snap/ tar-install/ 1369MRPROPER_FILES += .config .config.old .version \ 1370 Module.symvers \ 1371 signing_key.pem signing_key.priv signing_key.x509 \ 1372 x509.genkey extra_certificates signing_key.x509.keyid \ 1373 signing_key.x509.signer vmlinux-gdb.py \ 1374 *.spec 1375 1376# Directories & files removed with 'make distclean' 1377DISTCLEAN_DIRS += 1378DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 1379 1380# clean - Delete most, but leave enough to build external modules 1381# 1382clean: rm-dirs := $(CLEAN_DIRS) 1383clean: rm-files := $(CLEAN_FILES) 1384 1385PHONY += archclean vmlinuxclean 1386 1387vmlinuxclean: 1388 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1389 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1390 1391clean: archclean vmlinuxclean 1392 1393# mrproper - Delete all generated files, including .config 1394# 1395mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1396mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1397mrproper-dirs := $(addprefix _mrproper_,scripts) 1398 1399PHONY += $(mrproper-dirs) mrproper 1400$(mrproper-dirs): 1401 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1402 1403mrproper: clean $(mrproper-dirs) 1404 $(call cmd,rmdirs) 1405 $(call cmd,rmfiles) 1406 1407# distclean 1408# 1409distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) 1410distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 1411 1412PHONY += distclean 1413 1414distclean: mrproper 1415 $(call cmd,rmdirs) 1416 $(call cmd,rmfiles) 1417 @find $(srctree) $(RCS_FIND_IGNORE) \ 1418 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1419 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1420 -o -name 'core' \) \ 1421 -type f -print | xargs rm -f 1422 1423 1424# Packaging of the kernel to various formats 1425# --------------------------------------------------------------------------- 1426 1427%src-pkg: FORCE 1428 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1429%pkg: include/config/kernel.release FORCE 1430 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1431 1432# Brief documentation of the typical targets used 1433# --------------------------------------------------------------------------- 1434 1435boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1436boards := $(sort $(notdir $(boards))) 1437board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1438board-dirs := $(sort $(notdir $(board-dirs:/=))) 1439 1440PHONY += help 1441help: 1442 @echo 'Cleaning targets:' 1443 @echo ' clean - Remove most generated files but keep the config and' 1444 @echo ' enough build support to build external modules' 1445 @echo ' mrproper - Remove all generated files + config + various backup files' 1446 @echo ' distclean - mrproper + remove editor backup and patch files' 1447 @echo '' 1448 @echo 'Configuration targets:' 1449 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1450 @echo '' 1451 @echo 'Other generic targets:' 1452 @echo ' all - Build all targets marked with [*]' 1453 @echo '* vmlinux - Build the bare kernel' 1454 @echo '* modules - Build all modules' 1455 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1456 @echo ' dir/ - Build all files in dir and below' 1457 @echo ' dir/file.[ois] - Build specified target only' 1458 @echo ' dir/file.ll - Build the LLVM assembly file' 1459 @echo ' (requires compiler support for LLVM assembly generation)' 1460 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1461 @echo ' (requires a recent binutils and recent build (System.map))' 1462 @echo ' dir/file.ko - Build module including final link' 1463 @echo ' modules_prepare - Set up for building external modules' 1464 @echo ' tags/TAGS - Generate tags file for editors' 1465 @echo ' cscope - Generate cscope index' 1466 @echo ' gtags - Generate GNU GLOBAL index' 1467 @echo ' kernelrelease - Output the release version string (use with make -s)' 1468 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1469 @echo ' image_name - Output the image name (use with make -s)' 1470 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1471 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1472 echo '' 1473 @echo 'Static analysers:' 1474 @echo ' checkstack - Generate a list of stack hogs' 1475 @echo ' namespacecheck - Name space analysis on compiled kernel' 1476 @echo ' versioncheck - Sanity check on version.h usage' 1477 @echo ' includecheck - Check for duplicate included header files' 1478 @echo ' export_report - List the usages of all exported symbols' 1479 @echo ' headers_check - Sanity check on exported headers' 1480 @echo ' headerdep - Detect inclusion cycles in headers' 1481 @echo ' coccicheck - Check with Coccinelle' 1482 @echo '' 1483 @echo 'Tools:' 1484 @echo ' nsdeps - Generate missing symbol namespace dependencies' 1485 @echo '' 1486 @echo 'Kernel selftest:' 1487 @echo ' kselftest - Build and run kernel selftest (run as root)' 1488 @echo ' Build, install, and boot kernel before' 1489 @echo ' running kselftest on it' 1490 @echo ' kselftest-clean - Remove all generated kselftest files' 1491 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1492 @echo ' .config.' 1493 @echo '' 1494 @$(if $(dtstree), \ 1495 echo 'Devicetree:'; \ 1496 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1497 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1498 echo ' dt_binding_check - Validate device tree binding documents'; \ 1499 echo ' dtbs_check - Validate device tree source files';\ 1500 echo '') 1501 1502 @echo 'Userspace tools targets:' 1503 @echo ' use "make tools/help"' 1504 @echo ' or "cd tools; make help"' 1505 @echo '' 1506 @echo 'Kernel packaging:' 1507 @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1508 @echo '' 1509 @echo 'Documentation targets:' 1510 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1511 @echo '' 1512 @echo 'Architecture specific targets ($(SRCARCH)):' 1513 @$(if $(archhelp),$(archhelp),\ 1514 echo ' No architecture specific help defined for $(SRCARCH)') 1515 @echo '' 1516 @$(if $(boards), \ 1517 $(foreach b, $(boards), \ 1518 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1519 echo '') 1520 @$(if $(board-dirs), \ 1521 $(foreach b, $(board-dirs), \ 1522 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1523 printf " %-16s - Show all of the above\\n" help-boards; \ 1524 echo '') 1525 1526 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1527 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1528 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1529 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' 1530 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1531 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1532 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 1533 @echo ' 1: warnings which may be relevant and do not occur too often' 1534 @echo ' 2: warnings which occur quite often but may still be relevant' 1535 @echo ' 3: more obscure warnings, can most likely be ignored' 1536 @echo ' Multiple levels can be combined with W=12 or W=123' 1537 @echo '' 1538 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1539 @echo 'For further info see the ./README file' 1540 1541 1542help-board-dirs := $(addprefix help-,$(board-dirs)) 1543 1544help-boards: $(help-board-dirs) 1545 1546boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1547 1548$(help-board-dirs): help-%: 1549 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1550 @$(if $(boards-per-dir), \ 1551 $(foreach b, $(boards-per-dir), \ 1552 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1553 echo '') 1554 1555 1556# Documentation targets 1557# --------------------------------------------------------------------------- 1558DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1559 linkcheckdocs dochelp refcheckdocs 1560PHONY += $(DOC_TARGETS) 1561$(DOC_TARGETS): 1562 $(Q)$(MAKE) $(build)=Documentation $@ 1563 1564# Misc 1565# --------------------------------------------------------------------------- 1566 1567PHONY += scripts_gdb 1568scripts_gdb: prepare0 1569 $(Q)$(MAKE) $(build)=scripts/gdb 1570 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1571 1572ifdef CONFIG_GDB_SCRIPTS 1573all: scripts_gdb 1574endif 1575 1576else # KBUILD_EXTMOD 1577 1578### 1579# External module support. 1580# When building external modules the kernel used as basis is considered 1581# read-only, and no consistency checks are made and the make 1582# system is not used on the basis kernel. If updates are required 1583# in the basis kernel ordinary make commands (without M=...) must 1584# be used. 1585# 1586# The following are the only valid targets when building external 1587# modules. 1588# make M=dir clean Delete all automatically generated files 1589# make M=dir modules Make all modules in specified dir 1590# make M=dir Same as 'make M=dir modules' 1591# make M=dir modules_install 1592# Install the modules built in the module directory 1593# Assumes install directory is already created 1594 1595# We are always building modules 1596KBUILD_MODULES := 1 1597 1598PHONY += $(objtree)/Module.symvers 1599$(objtree)/Module.symvers: 1600 @test -e $(objtree)/Module.symvers || ( \ 1601 echo; \ 1602 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1603 echo " is missing; modules will have no dependencies and modversions."; \ 1604 echo ) 1605 1606build-dirs := $(KBUILD_EXTMOD) 1607PHONY += modules 1608modules: descend $(objtree)/Module.symvers 1609 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1610 1611PHONY += modules_install 1612modules_install: _emodinst_ _emodinst_post 1613 1614install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1615PHONY += _emodinst_ 1616_emodinst_: 1617 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1618 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1619 1620PHONY += _emodinst_post 1621_emodinst_post: _emodinst_ 1622 $(call cmd,depmod) 1623 1624clean-dirs := $(KBUILD_EXTMOD) 1625clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1626 1627PHONY += / 1628/: 1629 @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' 1630 1631PHONY += help 1632help: 1633 @echo ' Building external modules.' 1634 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1635 @echo '' 1636 @echo ' modules - default target, build the module(s)' 1637 @echo ' modules_install - install the module' 1638 @echo ' clean - remove generated files in module directory only' 1639 @echo '' 1640 1641PHONY += prepare 1642endif # KBUILD_EXTMOD 1643 1644# Handle descending into subdirectories listed in $(build-dirs) 1645# Preset locale variables to speed up the build process. Limit locale 1646# tweaks to this spot to avoid wrong language settings when running 1647# make menuconfig etc. 1648# Error messages still appears in the original language 1649PHONY += descend $(build-dirs) 1650descend: $(build-dirs) 1651$(build-dirs): prepare 1652 $(Q)$(MAKE) $(build)=$@ single-build=$(single-build) need-builtin=1 need-modorder=1 1653 1654clean-dirs := $(addprefix _clean_, $(clean-dirs)) 1655PHONY += $(clean-dirs) clean 1656$(clean-dirs): 1657 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1658 1659clean: $(clean-dirs) 1660 $(call cmd,rmdirs) 1661 $(call cmd,rmfiles) 1662 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1663 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1664 -o -name '*.ko.*' \ 1665 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1666 -o -name '*.dwo' -o -name '*.lst' \ 1667 -o -name '*.su' -o -name '*.mod' -o -name '*.ns_deps' \ 1668 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1669 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1670 -o -name '*.asn1.[ch]' \ 1671 -o -name '*.symtypes' -o -name 'modules.order' \ 1672 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1673 -o -name '*.c.[012]*.*' \ 1674 -o -name '*.ll' \ 1675 -o -name '*.gcno' \) -type f -print | xargs rm -f 1676 1677# Generate tags for editors 1678# --------------------------------------------------------------------------- 1679quiet_cmd_tags = GEN $@ 1680 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 1681 1682tags TAGS cscope gtags: FORCE 1683 $(call cmd,tags) 1684 1685# Script to generate missing namespace dependencies 1686# --------------------------------------------------------------------------- 1687 1688PHONY += nsdeps 1689 1690nsdeps: modules 1691 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost nsdeps 1692 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1693 1694# Scripts to check various things for consistency 1695# --------------------------------------------------------------------------- 1696 1697PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1698 1699includecheck: 1700 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1701 -name '*.[hcS]' -type f -print | sort \ 1702 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1703 1704versioncheck: 1705 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1706 -name '*.[hcS]' -type f -print | sort \ 1707 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1708 1709coccicheck: 1710 $(Q)$(BASH) $(srctree)/scripts/$@ 1711 1712namespacecheck: 1713 $(PERL) $(srctree)/scripts/namespace.pl 1714 1715export_report: 1716 $(PERL) $(srctree)/scripts/export_report.pl 1717 1718PHONY += checkstack kernelrelease kernelversion image_name 1719 1720# UML needs a little special treatment here. It wants to use the host 1721# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1722# else wants $(ARCH), including people doing cross-builds, which means 1723# that $(SUBARCH) doesn't work here. 1724ifeq ($(ARCH), um) 1725CHECKSTACK_ARCH := $(SUBARCH) 1726else 1727CHECKSTACK_ARCH := $(ARCH) 1728endif 1729checkstack: 1730 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1731 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1732 1733kernelrelease: 1734 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1735 1736kernelversion: 1737 @echo $(KERNELVERSION) 1738 1739image_name: 1740 @echo $(KBUILD_IMAGE) 1741 1742# Clear a bunch of variables before executing the submake 1743 1744ifeq ($(quiet),silent_) 1745tools_silent=s 1746endif 1747 1748tools/: FORCE 1749 $(Q)mkdir -p $(objtree)/tools 1750 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1751 1752tools/%: FORCE 1753 $(Q)mkdir -p $(objtree)/tools 1754 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1755 1756# Single targets 1757# --------------------------------------------------------------------------- 1758# To build individual files in subdirectories, you can do like this: 1759# 1760# make foo/bar/baz.s 1761# 1762# The supported suffixes for single-target are listed in 'single-targets' 1763# 1764# To build only under specific subdirectories, you can do like this: 1765# 1766# make foo/bar/baz/ 1767 1768ifdef single-build 1769 1770single-all := $(filter $(single-targets), $(MAKECMDGOALS)) 1771 1772# .ko is special because modpost is needed 1773single-ko := $(sort $(filter %.ko, $(single-all))) 1774single-no-ko := $(sort $(patsubst %.ko,%.mod, $(single-all))) 1775 1776$(single-ko): single_modpost 1777 @: 1778$(single-no-ko): descend 1779 @: 1780 1781ifeq ($(KBUILD_EXTMOD),) 1782# For the single build of in-tree modules, use a temporary file to avoid 1783# the situation of modules_install installing an invalid modules.order. 1784MODORDER := .modules.tmp 1785endif 1786 1787PHONY += single_modpost 1788single_modpost: $(single-no-ko) 1789 $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 1790 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1791 1792KBUILD_MODULES := 1 1793 1794export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1795 1796single-build = $(if $(filter-out $@/, $(single-no-ko)),1) 1797 1798endif 1799 1800# FIXME Should go into a make.lib or something 1801# =========================================================================== 1802 1803quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1804 cmd_rmdirs = rm -rf $(rm-dirs) 1805 1806quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1807 cmd_rmfiles = rm -f $(rm-files) 1808 1809# Run depmod only if we have System.map and depmod is executable 1810quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1811 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1812 $(KERNELRELEASE) 1813 1814# read saved command lines for existing targets 1815existing-targets := $(wildcard $(sort $(targets))) 1816 1817-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1818 1819endif # config-targets 1820endif # mixed-build 1821endif # need-sub-make 1822 1823PHONY += FORCE 1824FORCE: 1825 1826# Declare the contents of the PHONY variable as phony. We keep that 1827# information in a variable so we can use it in if_changed and friends. 1828.PHONY: $(PHONY) 1829