1# SPDX-License-Identifier: GPL-2.0 2VERSION = 5 3PATCHLEVEL = 6 4SUBLEVEL = 0 5EXTRAVERSION = -rc2 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 417READELF = $(CROSS_COMPILE)readelf 418PAHOLE = pahole 419LEX = flex 420YACC = bison 421AWK = awk 422INSTALLKERNEL := installkernel 423DEPMOD = /sbin/depmod 424PERL = perl 425PYTHON = python 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 READELF PAHOLE LEX YACC AWK INSTALLKERNEL 476export PERL PYTHON 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/ 621net-y := net/ 622libs-y := lib/ 623core-y := usr/ 624virt-y := virt/ 625endif # KBUILD_EXTMOD 626 627# The all: target is the default when no target is given on the 628# command line. 629# This allow a user to issue only 'make' to build a kernel including modules 630# Defaults to vmlinux, but the arch makefile usually adds further targets 631all: vmlinux 632 633CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 634 $(call cc-option,-fno-tree-loop-im) \ 635 $(call cc-disable-warning,maybe-uninitialized,) 636export CFLAGS_GCOV 637 638# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 639ifdef CONFIG_FUNCTION_TRACER 640 CC_FLAGS_FTRACE := -pg 641endif 642 643RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 644RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 645RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 646RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 647RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 648RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 649export RETPOLINE_CFLAGS 650export RETPOLINE_VDSO_CFLAGS 651 652include arch/$(SRCARCH)/Makefile 653 654ifdef need-config 655ifdef may-sync-config 656# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 657# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 658# because some architectures define CROSS_COMPILE there. 659include include/config/auto.conf.cmd 660 661$(KCONFIG_CONFIG): 662 @echo >&2 '***' 663 @echo >&2 '*** Configuration file "$@" not found!' 664 @echo >&2 '***' 665 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 666 @echo >&2 '*** "make menuconfig" or "make xconfig").' 667 @echo >&2 '***' 668 @/bin/false 669 670# The actual configuration files used during the build are stored in 671# include/generated/ and include/config/. Update them if .config is newer than 672# include/config/auto.conf (which mirrors .config). 673# 674# This exploits the 'multi-target pattern rule' trick. 675# The syncconfig should be executed only once to make all the targets. 676%/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG) 677 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 678else # !may-sync-config 679# External modules and some install targets need include/generated/autoconf.h 680# and include/config/auto.conf but do not care if they are up-to-date. 681# Use auto.conf to trigger the test 682PHONY += include/config/auto.conf 683 684include/config/auto.conf: 685 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 686 echo >&2; \ 687 echo >&2 " ERROR: Kernel configuration is invalid."; \ 688 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 689 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 690 echo >&2 ; \ 691 /bin/false) 692 693endif # may-sync-config 694endif # need-config 695 696KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 697KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 698KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 699KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 700KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 701 702ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 703KBUILD_CFLAGS += -O2 704else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 705KBUILD_CFLAGS += -O3 706else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 707KBUILD_CFLAGS += -Os 708endif 709 710ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 711KBUILD_CFLAGS += -Wno-maybe-uninitialized 712endif 713 714# Tell gcc to never replace conditional load with a non-conditional one 715KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 716 717include scripts/Makefile.kcov 718include scripts/Makefile.gcc-plugins 719 720ifdef CONFIG_READABLE_ASM 721# Disable optimizations that make assembler listings hard to read. 722# reorder blocks reorders the control in the function 723# ipa clone creates specialized cloned functions 724# partial inlining inlines only parts of functions 725KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 726 $(call cc-option,-fno-ipa-cp-clone,) \ 727 $(call cc-option,-fno-partial-inlining) 728endif 729 730ifneq ($(CONFIG_FRAME_WARN),0) 731KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 732endif 733 734stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 735stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 736stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 737 738KBUILD_CFLAGS += $(stackp-flags-y) 739 740ifdef CONFIG_CC_IS_CLANG 741KBUILD_CPPFLAGS += -Qunused-arguments 742KBUILD_CFLAGS += -Wno-format-invalid-specifier 743KBUILD_CFLAGS += -Wno-gnu 744# Quiet clang warning: comparison of unsigned expression < 0 is always false 745KBUILD_CFLAGS += -Wno-tautological-compare 746# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 747# source of a reference will be _MergedGlobals and not on of the whitelisted names. 748# See modpost pattern 2 749KBUILD_CFLAGS += -mno-global-merge 750else 751 752# These warnings generated too much noise in a regular build. 753# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 754KBUILD_CFLAGS += -Wno-unused-but-set-variable 755 756# Warn about unmarked fall-throughs in switch statement. 757# Disabled for clang while comment to attribute conversion happens and 758# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. 759KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) 760endif 761 762KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 763ifdef CONFIG_FRAME_POINTER 764KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 765else 766# Some targets (ARM with Thumb2, for example), can't be built with frame 767# pointers. For those, we don't have FUNCTION_TRACER automatically 768# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 769# incompatible with -fomit-frame-pointer with current GCC, so we don't use 770# -fomit-frame-pointer with FUNCTION_TRACER. 771ifndef CONFIG_FUNCTION_TRACER 772KBUILD_CFLAGS += -fomit-frame-pointer 773endif 774endif 775 776# Initialize all stack variables with a pattern, if desired. 777ifdef CONFIG_INIT_STACK_ALL 778KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 779endif 780 781DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 782 783ifdef CONFIG_DEBUG_INFO 784ifdef CONFIG_DEBUG_INFO_SPLIT 785DEBUG_CFLAGS += -gsplit-dwarf 786else 787DEBUG_CFLAGS += -g 788endif 789KBUILD_AFLAGS += -Wa,-gdwarf-2 790endif 791ifdef CONFIG_DEBUG_INFO_DWARF4 792DEBUG_CFLAGS += -gdwarf-4 793endif 794 795ifdef CONFIG_DEBUG_INFO_REDUCED 796DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 797 $(call cc-option,-fno-var-tracking) 798endif 799 800KBUILD_CFLAGS += $(DEBUG_CFLAGS) 801export DEBUG_CFLAGS 802 803ifdef CONFIG_FUNCTION_TRACER 804ifdef CONFIG_FTRACE_MCOUNT_RECORD 805 # gcc 5 supports generating the mcount tables directly 806 ifeq ($(call cc-option-yn,-mrecord-mcount),y) 807 CC_FLAGS_FTRACE += -mrecord-mcount 808 export CC_USING_RECORD_MCOUNT := 1 809 endif 810 ifdef CONFIG_HAVE_NOP_MCOUNT 811 ifeq ($(call cc-option-yn, -mnop-mcount),y) 812 CC_FLAGS_FTRACE += -mnop-mcount 813 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 814 endif 815 endif 816endif 817ifdef CONFIG_HAVE_FENTRY 818 ifeq ($(call cc-option-yn, -mfentry),y) 819 CC_FLAGS_FTRACE += -mfentry 820 CC_FLAGS_USING += -DCC_USING_FENTRY 821 endif 822endif 823export CC_FLAGS_FTRACE 824KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 825KBUILD_AFLAGS += $(CC_FLAGS_USING) 826ifdef CONFIG_DYNAMIC_FTRACE 827 ifdef CONFIG_HAVE_C_RECORDMCOUNT 828 BUILD_C_RECORDMCOUNT := y 829 export BUILD_C_RECORDMCOUNT 830 endif 831endif 832endif 833 834# We trigger additional mismatches with less inlining 835ifdef CONFIG_DEBUG_SECTION_MISMATCH 836KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 837endif 838 839ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 840KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 841LDFLAGS_vmlinux += --gc-sections 842endif 843 844ifdef CONFIG_LIVEPATCH 845KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 846endif 847 848# arch Makefile may override CC so keep this after arch Makefile is included 849NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 850 851# warn about C99 declaration after statement 852KBUILD_CFLAGS += -Wdeclaration-after-statement 853 854# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 855KBUILD_CFLAGS += -Wvla 856 857# disable pointer signed / unsigned warnings in gcc 4.0 858KBUILD_CFLAGS += -Wno-pointer-sign 859 860# disable stringop warnings in gcc 8+ 861KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 862 863# disable invalid "can't wrap" optimizations for signed / pointers 864KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 865 866# clang sets -fmerge-all-constants by default as optimization, but this 867# is non-conforming behavior for C and in fact breaks the kernel, so we 868# need to disable it here generally. 869KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 870 871# for gcc -fno-merge-all-constants disables everything, but it is fine 872# to have actual conforming behavior enabled. 873KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 874 875# Make sure -fstack-check isn't enabled (like gentoo apparently did) 876KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 877 878# conserve stack if available 879KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 880 881# Prohibit date/time macros, which would make the build non-deterministic 882KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 883 884# enforce correct pointer usage 885KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 886 887# Require designated initializers for all marked structures 888KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 889 890# change __FILE__ to the relative path from the srctree 891KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 892 893# ensure -fcf-protection is disabled when using retpoline as it is 894# incompatible with -mindirect-branch=thunk-extern 895ifdef CONFIG_RETPOLINE 896KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 897endif 898 899include scripts/Makefile.kasan 900include scripts/Makefile.extrawarn 901include scripts/Makefile.ubsan 902 903# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 904KBUILD_CPPFLAGS += $(KCPPFLAGS) 905KBUILD_AFLAGS += $(KAFLAGS) 906KBUILD_CFLAGS += $(KCFLAGS) 907 908KBUILD_LDFLAGS_MODULE += --build-id 909LDFLAGS_vmlinux += --build-id 910 911ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 912LDFLAGS_vmlinux += $(call ld-option, -X,) 913endif 914 915ifeq ($(CONFIG_RELR),y) 916LDFLAGS_vmlinux += --pack-dyn-relocs=relr 917endif 918 919# make the checker run with the right architecture 920CHECKFLAGS += --arch=$(ARCH) 921 922# insure the checker run with the right endianness 923CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 924 925# the checker needs the correct machine size 926CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 927 928# Default kernel image to build when no specific target is given. 929# KBUILD_IMAGE may be overruled on the command line or 930# set in the environment 931# Also any assignments in arch/$(ARCH)/Makefile take precedence over 932# this default value 933export KBUILD_IMAGE ?= vmlinux 934 935# 936# INSTALL_PATH specifies where to place the updated kernel and system map 937# images. Default is /boot, but you can set it to other values 938export INSTALL_PATH ?= /boot 939 940# 941# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 942# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 943# an argument if needed. Otherwise it defaults to the kernel install path 944# 945export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 946 947# 948# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 949# relocations required by build roots. This is not defined in the 950# makefile but the argument can be passed to make if needed. 951# 952 953MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 954export MODLIB 955 956# 957# INSTALL_MOD_STRIP, if defined, will cause modules to be 958# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 959# the default option --strip-debug will be used. Otherwise, 960# INSTALL_MOD_STRIP value will be used as the options to the strip command. 961 962ifdef INSTALL_MOD_STRIP 963ifeq ($(INSTALL_MOD_STRIP),1) 964mod_strip_cmd = $(STRIP) --strip-debug 965else 966mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 967endif # INSTALL_MOD_STRIP=1 968else 969mod_strip_cmd = true 970endif # INSTALL_MOD_STRIP 971export mod_strip_cmd 972 973# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 974# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 975# or CONFIG_MODULE_COMPRESS_XZ. 976 977mod_compress_cmd = true 978ifdef CONFIG_MODULE_COMPRESS 979 ifdef CONFIG_MODULE_COMPRESS_GZIP 980 mod_compress_cmd = gzip -n -f 981 endif # CONFIG_MODULE_COMPRESS_GZIP 982 ifdef CONFIG_MODULE_COMPRESS_XZ 983 mod_compress_cmd = xz -f 984 endif # CONFIG_MODULE_COMPRESS_XZ 985endif # CONFIG_MODULE_COMPRESS 986export mod_compress_cmd 987 988ifdef CONFIG_MODULE_SIG_ALL 989$(eval $(call config_filename,MODULE_SIG_KEY)) 990 991mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 992else 993mod_sign_cmd = true 994endif 995export mod_sign_cmd 996 997HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 998 999ifdef CONFIG_STACK_VALIDATION 1000 has_libelf := $(call try-run,\ 1001 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 1002 ifeq ($(has_libelf),1) 1003 objtool_target := tools/objtool FORCE 1004 else 1005 SKIP_STACK_VALIDATION := 1 1006 export SKIP_STACK_VALIDATION 1007 endif 1008endif 1009 1010PHONY += prepare0 1011 1012export MODORDER := $(extmod-prefix)modules.order 1013export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps 1014 1015ifeq ($(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 1199# Deprecated. It is no-op now. 1200PHONY += headers_check 1201headers_check: 1202 @: 1203 1204ifdef CONFIG_HEADERS_INSTALL 1205prepare: headers 1206endif 1207 1208PHONY += scripts_unifdef 1209scripts_unifdef: scripts_basic 1210 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1211 1212# --------------------------------------------------------------------------- 1213# Kernel selftest 1214 1215PHONY += kselftest 1216kselftest: 1217 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1218 1219kselftest-%: FORCE 1220 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* 1221 1222PHONY += kselftest-merge 1223kselftest-merge: 1224 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1225 $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1226 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1227 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1228 1229# --------------------------------------------------------------------------- 1230# Devicetree files 1231 1232ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1233dtstree := arch/$(SRCARCH)/boot/dts 1234endif 1235 1236ifneq ($(dtstree),) 1237 1238%.dtb: include/config/kernel.release scripts_dtc 1239 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1240 1241PHONY += dtbs dtbs_install dt_binding_check 1242dtbs dtbs_check: include/config/kernel.release scripts_dtc 1243 $(Q)$(MAKE) $(build)=$(dtstree) 1244 1245dtbs_check: export CHECK_DTBS=1 1246dtbs_check: dt_binding_check 1247 1248dtbs_install: 1249 $(Q)$(MAKE) $(dtbinst)=$(dtstree) 1250 1251ifdef CONFIG_OF_EARLY_FLATTREE 1252all: dtbs 1253endif 1254 1255endif 1256 1257PHONY += scripts_dtc 1258scripts_dtc: scripts_basic 1259 $(Q)$(MAKE) $(build)=scripts/dtc 1260 1261dt_binding_check: scripts_dtc 1262 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1263 1264# --------------------------------------------------------------------------- 1265# Modules 1266 1267ifdef CONFIG_MODULES 1268 1269# By default, build modules as well 1270 1271all: modules 1272 1273# Build modules 1274# 1275# A module can be listed more than once in obj-m resulting in 1276# duplicate lines in modules.order files. Those are removed 1277# using awk while concatenating to the final file. 1278 1279PHONY += modules 1280modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order 1281 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1282 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 1283 1284modules.order: descend 1285 $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ 1286 1287# Target to prepare building external modules 1288PHONY += modules_prepare 1289modules_prepare: prepare 1290 1291# Target to install modules 1292PHONY += modules_install 1293modules_install: _modinst_ _modinst_post 1294 1295PHONY += _modinst_ 1296_modinst_: 1297 @rm -rf $(MODLIB)/kernel 1298 @rm -f $(MODLIB)/source 1299 @mkdir -p $(MODLIB)/kernel 1300 @ln -s $(abspath $(srctree)) $(MODLIB)/source 1301 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1302 rm -f $(MODLIB)/build ; \ 1303 ln -s $(CURDIR) $(MODLIB)/build ; \ 1304 fi 1305 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 1306 @cp -f modules.builtin $(MODLIB)/ 1307 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1308 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1309 1310# This depmod is only for convenience to give the initial 1311# boot a modules.dep even before / is mounted read-write. However the 1312# boot script depmod is the master version. 1313PHONY += _modinst_post 1314_modinst_post: _modinst_ 1315 $(call cmd,depmod) 1316 1317ifeq ($(CONFIG_MODULE_SIG), y) 1318PHONY += modules_sign 1319modules_sign: 1320 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1321endif 1322 1323else # CONFIG_MODULES 1324 1325# Modules not configured 1326# --------------------------------------------------------------------------- 1327 1328PHONY += modules modules_install 1329modules modules_install: 1330 @echo >&2 1331 @echo >&2 "The present kernel configuration has modules disabled." 1332 @echo >&2 "Type 'make config' and enable loadable module support." 1333 @echo >&2 "Then build a kernel with module support enabled." 1334 @echo >&2 1335 @exit 1 1336 1337endif # CONFIG_MODULES 1338 1339### 1340# Cleaning is done on three levels. 1341# make clean Delete most generated files 1342# Leave enough to build external modules 1343# make mrproper Delete the current configuration, and all generated files 1344# make distclean Remove editor backup files, patch leftover files and the like 1345 1346# Directories & files removed with 'make clean' 1347CLEAN_DIRS += include/ksym 1348CLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps 1349 1350# Directories & files removed with 'make mrproper' 1351MRPROPER_DIRS += include/config include/generated \ 1352 arch/$(SRCARCH)/include/generated .tmp_objdiff \ 1353 debian/ snap/ tar-install/ 1354MRPROPER_FILES += .config .config.old .version \ 1355 Module.symvers \ 1356 signing_key.pem signing_key.priv signing_key.x509 \ 1357 x509.genkey extra_certificates signing_key.x509.keyid \ 1358 signing_key.x509.signer vmlinux-gdb.py \ 1359 *.spec 1360 1361# Directories & files removed with 'make distclean' 1362DISTCLEAN_DIRS += 1363DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 1364 1365# clean - Delete most, but leave enough to build external modules 1366# 1367clean: rm-dirs := $(CLEAN_DIRS) 1368clean: rm-files := $(CLEAN_FILES) 1369 1370PHONY += archclean vmlinuxclean 1371 1372vmlinuxclean: 1373 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1374 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1375 1376clean: archclean vmlinuxclean 1377 1378# mrproper - Delete all generated files, including .config 1379# 1380mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1381mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1382mrproper-dirs := $(addprefix _mrproper_,scripts) 1383 1384PHONY += $(mrproper-dirs) mrproper 1385$(mrproper-dirs): 1386 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1387 1388mrproper: clean $(mrproper-dirs) 1389 $(call cmd,rmdirs) 1390 $(call cmd,rmfiles) 1391 1392# distclean 1393# 1394distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) 1395distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 1396 1397PHONY += distclean 1398 1399distclean: mrproper 1400 $(call cmd,rmdirs) 1401 $(call cmd,rmfiles) 1402 @find $(srctree) $(RCS_FIND_IGNORE) \ 1403 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1404 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1405 -o -name 'core' \) \ 1406 -type f -print | xargs rm -f 1407 1408 1409# Packaging of the kernel to various formats 1410# --------------------------------------------------------------------------- 1411 1412%src-pkg: FORCE 1413 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1414%pkg: include/config/kernel.release FORCE 1415 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ 1416 1417# Brief documentation of the typical targets used 1418# --------------------------------------------------------------------------- 1419 1420boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1421boards := $(sort $(notdir $(boards))) 1422board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1423board-dirs := $(sort $(notdir $(board-dirs:/=))) 1424 1425PHONY += help 1426help: 1427 @echo 'Cleaning targets:' 1428 @echo ' clean - Remove most generated files but keep the config and' 1429 @echo ' enough build support to build external modules' 1430 @echo ' mrproper - Remove all generated files + config + various backup files' 1431 @echo ' distclean - mrproper + remove editor backup and patch files' 1432 @echo '' 1433 @echo 'Configuration targets:' 1434 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1435 @echo '' 1436 @echo 'Other generic targets:' 1437 @echo ' all - Build all targets marked with [*]' 1438 @echo '* vmlinux - Build the bare kernel' 1439 @echo '* modules - Build all modules' 1440 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1441 @echo ' dir/ - Build all files in dir and below' 1442 @echo ' dir/file.[ois] - Build specified target only' 1443 @echo ' dir/file.ll - Build the LLVM assembly file' 1444 @echo ' (requires compiler support for LLVM assembly generation)' 1445 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1446 @echo ' (requires a recent binutils and recent build (System.map))' 1447 @echo ' dir/file.ko - Build module including final link' 1448 @echo ' modules_prepare - Set up for building external modules' 1449 @echo ' tags/TAGS - Generate tags file for editors' 1450 @echo ' cscope - Generate cscope index' 1451 @echo ' gtags - Generate GNU GLOBAL index' 1452 @echo ' kernelrelease - Output the release version string (use with make -s)' 1453 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1454 @echo ' image_name - Output the image name (use with make -s)' 1455 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1456 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1457 echo '' 1458 @echo 'Static analysers:' 1459 @echo ' checkstack - Generate a list of stack hogs' 1460 @echo ' namespacecheck - Name space analysis on compiled kernel' 1461 @echo ' versioncheck - Sanity check on version.h usage' 1462 @echo ' includecheck - Check for duplicate included header files' 1463 @echo ' export_report - List the usages of all exported symbols' 1464 @echo ' headerdep - Detect inclusion cycles in headers' 1465 @echo ' coccicheck - Check with Coccinelle' 1466 @echo '' 1467 @echo 'Tools:' 1468 @echo ' nsdeps - Generate missing symbol namespace dependencies' 1469 @echo '' 1470 @echo 'Kernel selftest:' 1471 @echo ' kselftest - Build and run kernel selftest (run as root)' 1472 @echo ' Build, install, and boot kernel before' 1473 @echo ' running kselftest on it' 1474 @echo ' kselftest-clean - Remove all generated kselftest files' 1475 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1476 @echo ' .config.' 1477 @echo '' 1478 @$(if $(dtstree), \ 1479 echo 'Devicetree:'; \ 1480 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1481 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1482 echo ' dt_binding_check - Validate device tree binding documents'; \ 1483 echo ' dtbs_check - Validate device tree source files';\ 1484 echo '') 1485 1486 @echo 'Userspace tools targets:' 1487 @echo ' use "make tools/help"' 1488 @echo ' or "cd tools; make help"' 1489 @echo '' 1490 @echo 'Kernel packaging:' 1491 @$(MAKE) -f $(srctree)/scripts/Makefile.package help 1492 @echo '' 1493 @echo 'Documentation targets:' 1494 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1495 @echo '' 1496 @echo 'Architecture specific targets ($(SRCARCH)):' 1497 @$(if $(archhelp),$(archhelp),\ 1498 echo ' No architecture specific help defined for $(SRCARCH)') 1499 @echo '' 1500 @$(if $(boards), \ 1501 $(foreach b, $(boards), \ 1502 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1503 echo '') 1504 @$(if $(board-dirs), \ 1505 $(foreach b, $(board-dirs), \ 1506 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1507 printf " %-16s - Show all of the above\\n" help-boards; \ 1508 echo '') 1509 1510 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1511 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1512 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1513 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' 1514 @echo ' (sparse by default)' 1515 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1516 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1517 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' 1518 @echo ' 1: warnings which may be relevant and do not occur too often' 1519 @echo ' 2: warnings which occur quite often but may still be relevant' 1520 @echo ' 3: more obscure warnings, can most likely be ignored' 1521 @echo ' Multiple levels can be combined with W=12 or W=123' 1522 @echo '' 1523 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1524 @echo 'For further info see the ./README file' 1525 1526 1527help-board-dirs := $(addprefix help-,$(board-dirs)) 1528 1529help-boards: $(help-board-dirs) 1530 1531boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1532 1533$(help-board-dirs): help-%: 1534 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1535 @$(if $(boards-per-dir), \ 1536 $(foreach b, $(boards-per-dir), \ 1537 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1538 echo '') 1539 1540 1541# Documentation targets 1542# --------------------------------------------------------------------------- 1543DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1544 linkcheckdocs dochelp refcheckdocs 1545PHONY += $(DOC_TARGETS) 1546$(DOC_TARGETS): 1547 $(Q)$(MAKE) $(build)=Documentation $@ 1548 1549# Misc 1550# --------------------------------------------------------------------------- 1551 1552PHONY += scripts_gdb 1553scripts_gdb: prepare0 1554 $(Q)$(MAKE) $(build)=scripts/gdb 1555 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1556 1557ifdef CONFIG_GDB_SCRIPTS 1558all: scripts_gdb 1559endif 1560 1561else # KBUILD_EXTMOD 1562 1563### 1564# External module support. 1565# When building external modules the kernel used as basis is considered 1566# read-only, and no consistency checks are made and the make 1567# system is not used on the basis kernel. If updates are required 1568# in the basis kernel ordinary make commands (without M=...) must 1569# be used. 1570# 1571# The following are the only valid targets when building external 1572# modules. 1573# make M=dir clean Delete all automatically generated files 1574# make M=dir modules Make all modules in specified dir 1575# make M=dir Same as 'make M=dir modules' 1576# make M=dir modules_install 1577# Install the modules built in the module directory 1578# Assumes install directory is already created 1579 1580# We are always building modules 1581KBUILD_MODULES := 1 1582 1583PHONY += $(objtree)/Module.symvers 1584$(objtree)/Module.symvers: 1585 @test -e $(objtree)/Module.symvers || ( \ 1586 echo; \ 1587 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1588 echo " is missing; modules will have no dependencies and modversions."; \ 1589 echo ) 1590 1591build-dirs := $(KBUILD_EXTMOD) 1592PHONY += modules 1593modules: descend $(objtree)/Module.symvers 1594 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1595 1596PHONY += modules_install 1597modules_install: _emodinst_ _emodinst_post 1598 1599install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1600PHONY += _emodinst_ 1601_emodinst_: 1602 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1603 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1604 1605PHONY += _emodinst_post 1606_emodinst_post: _emodinst_ 1607 $(call cmd,depmod) 1608 1609clean-dirs := $(KBUILD_EXTMOD) 1610clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps 1611 1612PHONY += / 1613/: 1614 @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' 1615 1616PHONY += help 1617help: 1618 @echo ' Building external modules.' 1619 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1620 @echo '' 1621 @echo ' modules - default target, build the module(s)' 1622 @echo ' modules_install - install the module' 1623 @echo ' clean - remove generated files in module directory only' 1624 @echo '' 1625 1626PHONY += prepare 1627endif # KBUILD_EXTMOD 1628 1629# Single targets 1630# --------------------------------------------------------------------------- 1631# To build individual files in subdirectories, you can do like this: 1632# 1633# make foo/bar/baz.s 1634# 1635# The supported suffixes for single-target are listed in 'single-targets' 1636# 1637# To build only under specific subdirectories, you can do like this: 1638# 1639# make foo/bar/baz/ 1640 1641ifdef single-build 1642 1643# .ko is special because modpost is needed 1644single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) 1645single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) 1646 1647$(single-ko): single_modpost 1648 @: 1649$(single-no-ko): descend 1650 @: 1651 1652ifeq ($(KBUILD_EXTMOD),) 1653# For the single build of in-tree modules, use a temporary file to avoid 1654# the situation of modules_install installing an invalid modules.order. 1655MODORDER := .modules.tmp 1656endif 1657 1658PHONY += single_modpost 1659single_modpost: $(single-no-ko) 1660 $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) 1661 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1662 1663KBUILD_MODULES := 1 1664 1665export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) 1666 1667# trim unrelated directories 1668build-dirs := $(foreach d, $(build-dirs), \ 1669 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) 1670 1671endif 1672 1673# Handle descending into subdirectories listed in $(build-dirs) 1674# Preset locale variables to speed up the build process. Limit locale 1675# tweaks to this spot to avoid wrong language settings when running 1676# make menuconfig etc. 1677# Error messages still appears in the original language 1678PHONY += descend $(build-dirs) 1679descend: $(build-dirs) 1680$(build-dirs): prepare 1681 $(Q)$(MAKE) $(build)=$@ \ 1682 single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \ 1683 need-builtin=1 need-modorder=1 1684 1685clean-dirs := $(addprefix _clean_, $(clean-dirs)) 1686PHONY += $(clean-dirs) clean 1687$(clean-dirs): 1688 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1689 1690clean: $(clean-dirs) 1691 $(call cmd,rmdirs) 1692 $(call cmd,rmfiles) 1693 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1694 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1695 -o -name '*.ko.*' \ 1696 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1697 -o -name '*.dwo' -o -name '*.lst' \ 1698 -o -name '*.su' -o -name '*.mod' \ 1699 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1700 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1701 -o -name '*.asn1.[ch]' \ 1702 -o -name '*.symtypes' -o -name 'modules.order' \ 1703 -o -name '.tmp_*.o.*' \ 1704 -o -name '*.c.[012]*.*' \ 1705 -o -name '*.ll' \ 1706 -o -name '*.gcno' \) -type f -print | xargs rm -f 1707 1708# Generate tags for editors 1709# --------------------------------------------------------------------------- 1710quiet_cmd_tags = GEN $@ 1711 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ 1712 1713tags TAGS cscope gtags: FORCE 1714 $(call cmd,tags) 1715 1716# Script to generate missing namespace dependencies 1717# --------------------------------------------------------------------------- 1718 1719PHONY += nsdeps 1720nsdeps: export KBUILD_NSDEPS=1 1721nsdeps: modules 1722 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps 1723 1724# Scripts to check various things for consistency 1725# --------------------------------------------------------------------------- 1726 1727PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1728 1729includecheck: 1730 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1731 -name '*.[hcS]' -type f -print | sort \ 1732 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1733 1734versioncheck: 1735 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1736 -name '*.[hcS]' -type f -print | sort \ 1737 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1738 1739coccicheck: 1740 $(Q)$(BASH) $(srctree)/scripts/$@ 1741 1742namespacecheck: 1743 $(PERL) $(srctree)/scripts/namespace.pl 1744 1745export_report: 1746 $(PERL) $(srctree)/scripts/export_report.pl 1747 1748PHONY += checkstack kernelrelease kernelversion image_name 1749 1750# UML needs a little special treatment here. It wants to use the host 1751# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1752# else wants $(ARCH), including people doing cross-builds, which means 1753# that $(SUBARCH) doesn't work here. 1754ifeq ($(ARCH), um) 1755CHECKSTACK_ARCH := $(SUBARCH) 1756else 1757CHECKSTACK_ARCH := $(ARCH) 1758endif 1759checkstack: 1760 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1761 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1762 1763kernelrelease: 1764 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1765 1766kernelversion: 1767 @echo $(KERNELVERSION) 1768 1769image_name: 1770 @echo $(KBUILD_IMAGE) 1771 1772# Clear a bunch of variables before executing the submake 1773 1774ifeq ($(quiet),silent_) 1775tools_silent=s 1776endif 1777 1778tools/: FORCE 1779 $(Q)mkdir -p $(objtree)/tools 1780 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1781 1782tools/%: FORCE 1783 $(Q)mkdir -p $(objtree)/tools 1784 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1785 1786# FIXME Should go into a make.lib or something 1787# =========================================================================== 1788 1789quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1790 cmd_rmdirs = rm -rf $(rm-dirs) 1791 1792quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1793 cmd_rmfiles = rm -f $(rm-files) 1794 1795# Run depmod only if we have System.map and depmod is executable 1796quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1797 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1798 $(KERNELRELEASE) 1799 1800# read saved command lines for existing targets 1801existing-targets := $(wildcard $(sort $(targets))) 1802 1803-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1804 1805endif # config-targets 1806endif # mixed-build 1807endif # need-sub-make 1808 1809PHONY += FORCE 1810FORCE: 1811 1812# Declare the contents of the PHONY variable as phony. We keep that 1813# information in a variable so we can use it in if_changed and friends. 1814.PHONY: $(PHONY) 1815