1# SPDX-License-Identifier: GPL-2.0 2VERSION = 5 3PATCHLEVEL = 0 4SUBLEVEL = 0 5EXTRAVERSION = 6NAME = Shy Crocodile 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 ($(sub-make-done),1) 35 36# Do not use make's built-in rules and variables 37# (this increases performance and avoids hard-to-debug behaviour) 38MAKEFLAGS += -rR 39 40# 'MAKEFLAGS += -rR' does not become immediately effective for old 41# GNU Make versions. Cancel implicit rules for this Makefile. 42$(lastword $(MAKEFILE_LIST)): ; 43 44# Avoid funny character set dependencies 45unexport LC_ALL 46LC_COLLATE=C 47LC_NUMERIC=C 48export LC_COLLATE LC_NUMERIC 49 50# Avoid interference with shell env settings 51unexport GREP_OPTIONS 52 53# Beautify output 54# --------------------------------------------------------------------------- 55# 56# Normally, we echo the whole command before executing it. By making 57# that echo $($(quiet)$(cmd)), we now have the possibility to set 58# $(quiet) to choose other forms of output instead, e.g. 59# 60# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 61# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 62# 63# If $(quiet) is empty, the whole command will be printed. 64# If it is set to "quiet_", only the short version will be printed. 65# If it is set to "silent_", nothing will be printed at all, since 66# the variable $(silent_cmd_cc_o_c) doesn't exist. 67# 68# A simple variant is to prefix commands with $(Q) - that's useful 69# for commands that shall be hidden in non-verbose mode. 70# 71# $(Q)ln $@ :< 72# 73# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 74# If KBUILD_VERBOSE equals 1 then the above command is displayed. 75# 76# To put more focus on warnings, be less verbose as default 77# Use 'make V=1' to see the full commands 78 79ifeq ("$(origin V)", "command line") 80 KBUILD_VERBOSE = $(V) 81endif 82ifndef KBUILD_VERBOSE 83 KBUILD_VERBOSE = 0 84endif 85 86ifeq ($(KBUILD_VERBOSE),1) 87 quiet = 88 Q = 89else 90 quiet=quiet_ 91 Q = @ 92endif 93 94# If the user is running make -s (silent mode), suppress echoing of 95# commands 96 97ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 98 quiet=silent_ 99endif 100 101export quiet Q KBUILD_VERBOSE 102 103# kbuild supports saving output files in a separate directory. 104# To locate output files in a separate directory two syntaxes are supported. 105# In both cases the working directory must be the root of the kernel src. 106# 1) O= 107# Use "make O=dir/to/store/output/files/" 108# 109# 2) Set KBUILD_OUTPUT 110# Set the environment variable KBUILD_OUTPUT to point to the directory 111# where the output files shall be placed. 112# export KBUILD_OUTPUT=dir/to/store/output/files/ 113# make 114# 115# The O= assignment takes precedence over the KBUILD_OUTPUT environment 116# variable. 117 118# KBUILD_SRC is not intended to be used by the regular user (for now), 119# it is set on invocation of make with KBUILD_OUTPUT or O= specified. 120 121# OK, Make called in directory where kernel src resides 122# Do we want to locate output files in a separate directory? 123ifeq ("$(origin O)", "command line") 124 KBUILD_OUTPUT := $(O) 125endif 126 127ifneq ($(words $(subst :, ,$(CURDIR))), 1) 128 $(error main directory cannot contain spaces nor colons) 129endif 130 131ifneq ($(KBUILD_OUTPUT),) 132# check that the output directory actually exists 133saved-output := $(KBUILD_OUTPUT) 134KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ 135 && pwd) 136$(if $(KBUILD_OUTPUT),, \ 137 $(error failed to create output directory "$(saved-output)")) 138 139# Look for make include files relative to root of kernel src 140# 141# This does not become effective immediately because MAKEFLAGS is re-parsed 142# once after the Makefile is read. It is OK since we are going to invoke 143# 'sub-make' below. 144MAKEFLAGS += --include-dir=$(CURDIR) 145 146else 147 148# Do not print "Entering directory ..." at all for in-tree build. 149MAKEFLAGS += --no-print-directory 150 151endif # ifneq ($(KBUILD_OUTPUT),) 152 153PHONY += $(MAKECMDGOALS) sub-make 154 155$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 156 @: 157 158# Invoke a second make in the output directory, passing relevant variables 159sub-make: 160 $(Q)$(MAKE) sub-make-done=1 \ 161 $(if $(KBUILD_OUTPUT),-C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR)) \ 162 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) 163 164else # sub-make-done 165# We process the rest of the Makefile if this is the final invocation of make 166 167# Do not print "Entering directory ...", 168# but we want to display it when entering to the output directory 169# so that IDEs/editors are able to understand relative filenames. 170MAKEFLAGS += --no-print-directory 171 172# Call a source code checker (by default, "sparse") as part of the 173# C compilation. 174# 175# Use 'make C=1' to enable checking of only re-compiled files. 176# Use 'make C=2' to enable checking of *all* source files, regardless 177# of whether they are re-compiled or not. 178# 179# See the file "Documentation/dev-tools/sparse.rst" for more details, 180# including where to get the "sparse" utility. 181 182ifeq ("$(origin C)", "command line") 183 KBUILD_CHECKSRC = $(C) 184endif 185ifndef KBUILD_CHECKSRC 186 KBUILD_CHECKSRC = 0 187endif 188 189# Use make M=dir to specify directory of external module to build 190# Old syntax make ... SUBDIRS=$PWD is still supported 191# Setting the environment variable KBUILD_EXTMOD take precedence 192ifdef SUBDIRS 193 $(warning ================= WARNING ================) 194 $(warning 'SUBDIRS' will be removed after Linux 5.3) 195 $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) 196 $(warning ==========================================) 197 KBUILD_EXTMOD ?= $(SUBDIRS) 198endif 199 200ifeq ("$(origin M)", "command line") 201 KBUILD_EXTMOD := $(M) 202endif 203 204ifeq ($(KBUILD_SRC),) 205 # building in the source tree 206 srctree := . 207else 208 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 209 # building in a subdirectory of the source tree 210 srctree := .. 211 else 212 srctree := $(KBUILD_SRC) 213 endif 214endif 215 216export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC 217 218objtree := . 219src := $(srctree) 220obj := $(objtree) 221 222VPATH := $(srctree) 223 224export srctree objtree VPATH 225 226# To make sure we do not include .config for any of the *config targets 227# catch them early, and hand them over to scripts/kconfig/Makefile 228# It is allowed to specify more targets when calling make, including 229# mixing *config targets and build targets. 230# For example 'make oldconfig all'. 231# Detect when mixed targets is specified, and make a second invocation 232# of make so .config is not included in this case either (for *config). 233 234version_h := include/generated/uapi/linux/version.h 235old_version_h := include/linux/version.h 236 237clean-targets := %clean mrproper cleandocs 238no-dot-config-targets := $(clean-targets) \ 239 cscope gtags TAGS tags help% %docs check% coccicheck \ 240 $(version_h) headers_% archheaders archscripts \ 241 %asm-generic kernelversion %src-pkg 242no-sync-config-targets := $(no-dot-config-targets) install %install \ 243 kernelrelease 244 245config-targets := 0 246mixed-targets := 0 247dot-config := 1 248may-sync-config := 1 249 250ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 251 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 252 dot-config := 0 253 endif 254endif 255 256ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 257 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 258 may-sync-config := 0 259 endif 260endif 261 262ifneq ($(KBUILD_EXTMOD),) 263 may-sync-config := 0 264endif 265 266ifeq ($(KBUILD_EXTMOD),) 267 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 268 config-targets := 1 269 ifneq ($(words $(MAKECMDGOALS)),1) 270 mixed-targets := 1 271 endif 272 endif 273endif 274 275# For "make -j clean all", "make -j mrproper defconfig all", etc. 276ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 277 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 278 mixed-targets := 1 279 endif 280endif 281 282# install and modules_install need also be processed one by one 283ifneq ($(filter install,$(MAKECMDGOALS)),) 284 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 285 mixed-targets := 1 286 endif 287endif 288 289ifeq ($(mixed-targets),1) 290# =========================================================================== 291# We're called with mixed targets (*config and build targets). 292# Handle them one by one. 293 294PHONY += $(MAKECMDGOALS) __build_one_by_one 295 296$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 297 @: 298 299__build_one_by_one: 300 $(Q)set -e; \ 301 for i in $(MAKECMDGOALS); do \ 302 $(MAKE) -f $(srctree)/Makefile $$i; \ 303 done 304 305else 306 307include scripts/Kbuild.include 308 309# Read KERNELRELEASE from include/config/kernel.release (if it exists) 310KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 311KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 312export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 313 314include scripts/subarch.include 315 316# Cross compiling and selecting different set of gcc/bin-utils 317# --------------------------------------------------------------------------- 318# 319# When performing cross compilation for other architectures ARCH shall be set 320# to the target architecture. (See arch/* for the possibilities). 321# ARCH can be set during invocation of make: 322# make ARCH=ia64 323# Another way is to have ARCH set in the environment. 324# The default ARCH is the host where make is executed. 325 326# CROSS_COMPILE specify the prefix used for all executables used 327# during compilation. Only gcc and related bin-utils executables 328# are prefixed with $(CROSS_COMPILE). 329# CROSS_COMPILE can be set on the command line 330# make CROSS_COMPILE=ia64-linux- 331# Alternatively CROSS_COMPILE can be set in the environment. 332# Default value for CROSS_COMPILE is not to prefix executables 333# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 334ARCH ?= $(SUBARCH) 335 336# Architecture as present in compile.h 337UTS_MACHINE := $(ARCH) 338SRCARCH := $(ARCH) 339 340# Additional ARCH settings for x86 341ifeq ($(ARCH),i386) 342 SRCARCH := x86 343endif 344ifeq ($(ARCH),x86_64) 345 SRCARCH := x86 346endif 347 348# Additional ARCH settings for sparc 349ifeq ($(ARCH),sparc32) 350 SRCARCH := sparc 351endif 352ifeq ($(ARCH),sparc64) 353 SRCARCH := sparc 354endif 355 356# Additional ARCH settings for sh 357ifeq ($(ARCH),sh64) 358 SRCARCH := sh 359endif 360 361KCONFIG_CONFIG ?= .config 362export KCONFIG_CONFIG 363 364# SHELL used by kbuild 365CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 366 else if [ -x /bin/bash ]; then echo /bin/bash; \ 367 else echo sh; fi ; fi) 368 369HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 370HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 371HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 372 373HOSTCC = gcc 374HOSTCXX = g++ 375KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 376 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 377 $(HOSTCFLAGS) 378KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 379KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 380KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 381 382# Make variables (CC, etc...) 383AS = $(CROSS_COMPILE)as 384LD = $(CROSS_COMPILE)ld 385CC = $(CROSS_COMPILE)gcc 386CPP = $(CC) -E 387AR = $(CROSS_COMPILE)ar 388NM = $(CROSS_COMPILE)nm 389STRIP = $(CROSS_COMPILE)strip 390OBJCOPY = $(CROSS_COMPILE)objcopy 391OBJDUMP = $(CROSS_COMPILE)objdump 392LEX = flex 393YACC = bison 394AWK = awk 395INSTALLKERNEL := installkernel 396DEPMOD = /sbin/depmod 397PERL = perl 398PYTHON = python 399PYTHON2 = python2 400PYTHON3 = python3 401CHECK = sparse 402 403CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 404 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 405NOSTDINC_FLAGS = 406CFLAGS_MODULE = 407AFLAGS_MODULE = 408LDFLAGS_MODULE = 409CFLAGS_KERNEL = 410AFLAGS_KERNEL = 411LDFLAGS_vmlinux = 412 413# Use USERINCLUDE when you must reference the UAPI directories only. 414USERINCLUDE := \ 415 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 416 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 417 -I$(srctree)/include/uapi \ 418 -I$(objtree)/include/generated/uapi \ 419 -include $(srctree)/include/linux/kconfig.h 420 421# Use LINUXINCLUDE when you must reference the include/ directory. 422# Needed to be compatible with the O= option 423LINUXINCLUDE := \ 424 -I$(srctree)/arch/$(SRCARCH)/include \ 425 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 426 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 427 -I$(objtree)/include \ 428 $(USERINCLUDE) 429 430KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 431KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 432 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 433 -Werror=implicit-function-declaration -Werror=implicit-int \ 434 -Wno-format-security \ 435 -std=gnu89 436KBUILD_CPPFLAGS := -D__KERNEL__ 437KBUILD_AFLAGS_KERNEL := 438KBUILD_CFLAGS_KERNEL := 439KBUILD_AFLAGS_MODULE := -DMODULE 440KBUILD_CFLAGS_MODULE := -DMODULE 441KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 442KBUILD_LDFLAGS := 443GCC_PLUGINS_CFLAGS := 444 445export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 446export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS 447export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE 448export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 449 450export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 451export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 452export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 453export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 454export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 455export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 456export KBUILD_ARFLAGS 457 458# When compiling out-of-tree modules, put MODVERDIR in the module 459# tree rather than in the kernel tree. The kernel tree might 460# even be read-only. 461export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 462 463# Files to ignore in find ... statements 464 465export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 466 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 467 -prune -o 468export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 469 --exclude CVS --exclude .pc --exclude .hg --exclude .git 470 471# =========================================================================== 472# Rules shared between *config targets and build targets 473 474# Basic helpers built in scripts/basic/ 475PHONY += scripts_basic 476scripts_basic: 477 $(Q)$(MAKE) $(build)=scripts/basic 478 $(Q)rm -f .tmp_quiet_recordmcount 479 480PHONY += outputmakefile 481# outputmakefile generates a Makefile in the output directory, if using a 482# separate output directory. This allows convenient use of make in the 483# output directory. 484# At the same time when output Makefile generated, generate .gitignore to 485# ignore whole output directory 486outputmakefile: 487ifneq ($(KBUILD_SRC),) 488 $(Q)ln -fsn $(srctree) source 489 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 490 $(Q){ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 491endif 492 493ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 494ifneq ($(CROSS_COMPILE),) 495CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) 496GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 497CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 498GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 499endif 500ifneq ($(GCC_TOOLCHAIN),) 501CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 502endif 503CLANG_FLAGS += -no-integrated-as 504KBUILD_CFLAGS += $(CLANG_FLAGS) 505KBUILD_AFLAGS += $(CLANG_FLAGS) 506export CLANG_FLAGS 507endif 508 509RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 510RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 511RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 512RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 513RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 514RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 515export RETPOLINE_CFLAGS 516export RETPOLINE_VDSO_CFLAGS 517 518# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 519# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 520# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 521# and from include/config/auto.conf.cmd to detect the compiler upgrade. 522CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) 523 524ifeq ($(config-targets),1) 525# =========================================================================== 526# *config targets only - make sure prerequisites are updated, and descend 527# in scripts/kconfig to make the *config target 528 529# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 530# KBUILD_DEFCONFIG may point out an alternative default configuration 531# used for 'make defconfig' 532include arch/$(SRCARCH)/Makefile 533export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 534 535config: scripts_basic outputmakefile FORCE 536 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 537 538%config: scripts_basic outputmakefile FORCE 539 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 540 541else 542# =========================================================================== 543# Build targets only - this includes vmlinux, arch specific targets, clean 544# targets and others. In general all targets except *config targets. 545 546# If building an external module we do not care about the all: rule 547# but instead _all depend on modules 548PHONY += all 549ifeq ($(KBUILD_EXTMOD),) 550_all: all 551else 552_all: modules 553endif 554 555# Decide whether to build built-in, modular, or both. 556# Normally, just do built-in. 557 558KBUILD_MODULES := 559KBUILD_BUILTIN := 1 560 561# If we have only "make modules", don't compile built-in objects. 562# When we're building modules with modversions, we need to consider 563# the built-in objects during the descend as well, in order to 564# make sure the checksums are up to date before we record them. 565 566ifeq ($(MAKECMDGOALS),modules) 567 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 568endif 569 570# If we have "make <whatever> modules", compile modules 571# in addition to whatever we do anyway. 572# Just "make" or "make all" shall build modules as well 573 574ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 575 KBUILD_MODULES := 1 576endif 577 578ifeq ($(MAKECMDGOALS),) 579 KBUILD_MODULES := 1 580endif 581 582export KBUILD_MODULES KBUILD_BUILTIN 583 584ifeq ($(KBUILD_EXTMOD),) 585# Objects we will link into vmlinux / subdirs we need to visit 586init-y := init/ 587drivers-y := drivers/ sound/ 588net-y := net/ 589libs-y := lib/ 590core-y := usr/ 591virt-y := virt/ 592endif # KBUILD_EXTMOD 593 594ifeq ($(dot-config),1) 595include include/config/auto.conf 596endif 597 598# The all: target is the default when no target is given on the 599# command line. 600# This allow a user to issue only 'make' to build a kernel including modules 601# Defaults to vmlinux, but the arch makefile usually adds further targets 602all: vmlinux 603 604CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 605 $(call cc-option,-fno-tree-loop-im) \ 606 $(call cc-disable-warning,maybe-uninitialized,) 607export CFLAGS_GCOV 608 609# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 610ifdef CONFIG_FUNCTION_TRACER 611 CC_FLAGS_FTRACE := -pg 612endif 613 614# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 615# values of the respective KBUILD_* variables 616ARCH_CPPFLAGS := 617ARCH_AFLAGS := 618ARCH_CFLAGS := 619include arch/$(SRCARCH)/Makefile 620 621ifeq ($(dot-config),1) 622ifeq ($(may-sync-config),1) 623# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 624# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 625# because some architectures define CROSS_COMPILE there. 626-include include/config/auto.conf.cmd 627 628$(KCONFIG_CONFIG): 629 @echo >&2 '***' 630 @echo >&2 '*** Configuration file "$@" not found!' 631 @echo >&2 '***' 632 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 633 @echo >&2 '*** "make menuconfig" or "make xconfig").' 634 @echo >&2 '***' 635 @/bin/false 636 637# The actual configuration files used during the build are stored in 638# include/generated/ and include/config/. Update them if .config is newer than 639# include/config/auto.conf (which mirrors .config). 640# 641# This exploits the 'multi-target pattern rule' trick. 642# The syncconfig should be executed only once to make all the targets. 643%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) 644 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 645else 646# External modules and some install targets need include/generated/autoconf.h 647# and include/config/auto.conf but do not care if they are up-to-date. 648# Use auto.conf to trigger the test 649PHONY += include/config/auto.conf 650 651include/config/auto.conf: 652 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 653 echo >&2; \ 654 echo >&2 " ERROR: Kernel configuration is invalid."; \ 655 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 656 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 657 echo >&2 ; \ 658 /bin/false) 659 660endif # may-sync-config 661endif # $(dot-config) 662 663KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 664KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 665KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 666KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 667KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) 668 669ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 670KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) 671else 672KBUILD_CFLAGS += -O2 673endif 674 675ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 676KBUILD_CFLAGS += -Wno-maybe-uninitialized 677endif 678 679# Tell gcc to never replace conditional load with a non-conditional one 680KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 681 682include scripts/Makefile.kcov 683include scripts/Makefile.gcc-plugins 684 685ifdef CONFIG_READABLE_ASM 686# Disable optimizations that make assembler listings hard to read. 687# reorder blocks reorders the control in the function 688# ipa clone creates specialized cloned functions 689# partial inlining inlines only parts of functions 690KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 691 $(call cc-option,-fno-ipa-cp-clone,) \ 692 $(call cc-option,-fno-partial-inlining) 693endif 694 695ifneq ($(CONFIG_FRAME_WARN),0) 696KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 697endif 698 699stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 700stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 701stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 702 703KBUILD_CFLAGS += $(stackp-flags-y) 704 705ifdef CONFIG_CC_IS_CLANG 706KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 707KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 708KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 709KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 710# Quiet clang warning: comparison of unsigned expression < 0 is always false 711KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 712# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 713# source of a reference will be _MergedGlobals and not on of the whitelisted names. 714# See modpost pattern 2 715KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 716KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 717else 718 719# These warnings generated too much noise in a regular build. 720# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 721KBUILD_CFLAGS += -Wno-unused-but-set-variable 722endif 723 724KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 725ifdef CONFIG_FRAME_POINTER 726KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 727else 728# Some targets (ARM with Thumb2, for example), can't be built with frame 729# pointers. For those, we don't have FUNCTION_TRACER automatically 730# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 731# incompatible with -fomit-frame-pointer with current GCC, so we don't use 732# -fomit-frame-pointer with FUNCTION_TRACER. 733ifndef CONFIG_FUNCTION_TRACER 734KBUILD_CFLAGS += -fomit-frame-pointer 735endif 736endif 737 738DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 739 740ifdef CONFIG_DEBUG_INFO 741ifdef CONFIG_DEBUG_INFO_SPLIT 742DEBUG_CFLAGS += -gsplit-dwarf 743else 744DEBUG_CFLAGS += -g 745endif 746KBUILD_AFLAGS += -Wa,-gdwarf-2 747endif 748ifdef CONFIG_DEBUG_INFO_DWARF4 749DEBUG_CFLAGS += -gdwarf-4 750endif 751 752ifdef CONFIG_DEBUG_INFO_REDUCED 753DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 754 $(call cc-option,-fno-var-tracking) 755endif 756 757KBUILD_CFLAGS += $(DEBUG_CFLAGS) 758export DEBUG_CFLAGS 759 760ifdef CONFIG_FUNCTION_TRACER 761ifdef CONFIG_FTRACE_MCOUNT_RECORD 762 # gcc 5 supports generating the mcount tables directly 763 ifeq ($(call cc-option-yn,-mrecord-mcount),y) 764 CC_FLAGS_FTRACE += -mrecord-mcount 765 export CC_USING_RECORD_MCOUNT := 1 766 endif 767 ifdef CONFIG_HAVE_NOP_MCOUNT 768 ifeq ($(call cc-option-yn, -mnop-mcount),y) 769 CC_FLAGS_FTRACE += -mnop-mcount 770 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 771 endif 772 endif 773endif 774ifdef CONFIG_HAVE_FENTRY 775 ifeq ($(call cc-option-yn, -mfentry),y) 776 CC_FLAGS_FTRACE += -mfentry 777 CC_FLAGS_USING += -DCC_USING_FENTRY 778 endif 779endif 780export CC_FLAGS_FTRACE 781KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 782KBUILD_AFLAGS += $(CC_FLAGS_USING) 783ifdef CONFIG_DYNAMIC_FTRACE 784 ifdef CONFIG_HAVE_C_RECORDMCOUNT 785 BUILD_C_RECORDMCOUNT := y 786 export BUILD_C_RECORDMCOUNT 787 endif 788endif 789endif 790 791# We trigger additional mismatches with less inlining 792ifdef CONFIG_DEBUG_SECTION_MISMATCH 793KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 794endif 795 796ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 797KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 798LDFLAGS_vmlinux += --gc-sections 799endif 800 801# arch Makefile may override CC so keep this after arch Makefile is included 802NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 803 804# warn about C99 declaration after statement 805KBUILD_CFLAGS += -Wdeclaration-after-statement 806 807# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 808KBUILD_CFLAGS += $(call cc-option,-Wvla) 809 810# disable pointer signed / unsigned warnings in gcc 4.0 811KBUILD_CFLAGS += -Wno-pointer-sign 812 813# disable stringop warnings in gcc 8+ 814KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 815 816# disable invalid "can't wrap" optimizations for signed / pointers 817KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 818 819# clang sets -fmerge-all-constants by default as optimization, but this 820# is non-conforming behavior for C and in fact breaks the kernel, so we 821# need to disable it here generally. 822KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 823 824# for gcc -fno-merge-all-constants disables everything, but it is fine 825# to have actual conforming behavior enabled. 826KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 827 828# Make sure -fstack-check isn't enabled (like gentoo apparently did) 829KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 830 831# conserve stack if available 832KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 833 834# Prohibit date/time macros, which would make the build non-deterministic 835KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 836 837# enforce correct pointer usage 838KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 839 840# Require designated initializers for all marked structures 841KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 842 843# change __FILE__ to the relative path from the srctree 844KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 845 846# use the deterministic mode of AR if available 847KBUILD_ARFLAGS := $(call ar-option,D) 848 849include scripts/Makefile.kasan 850include scripts/Makefile.extrawarn 851include scripts/Makefile.ubsan 852 853# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 854# last assignments 855KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 856KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 857KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 858 859# Use --build-id when available. 860LDFLAGS_BUILD_ID := $(call ld-option, --build-id) 861KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 862LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 863 864ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 865LDFLAGS_vmlinux += $(call ld-option, -X,) 866endif 867 868# insure the checker run with the right endianness 869CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 870 871# the checker needs the correct machine size 872CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 873 874# Default kernel image to build when no specific target is given. 875# KBUILD_IMAGE may be overruled on the command line or 876# set in the environment 877# Also any assignments in arch/$(ARCH)/Makefile take precedence over 878# this default value 879export KBUILD_IMAGE ?= vmlinux 880 881# 882# INSTALL_PATH specifies where to place the updated kernel and system map 883# images. Default is /boot, but you can set it to other values 884export INSTALL_PATH ?= /boot 885 886# 887# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 888# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 889# an argument if needed. Otherwise it defaults to the kernel install path 890# 891export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 892 893# 894# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 895# relocations required by build roots. This is not defined in the 896# makefile but the argument can be passed to make if needed. 897# 898 899MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 900export MODLIB 901 902# 903# INSTALL_MOD_STRIP, if defined, will cause modules to be 904# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 905# the default option --strip-debug will be used. Otherwise, 906# INSTALL_MOD_STRIP value will be used as the options to the strip command. 907 908ifdef INSTALL_MOD_STRIP 909ifeq ($(INSTALL_MOD_STRIP),1) 910mod_strip_cmd = $(STRIP) --strip-debug 911else 912mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 913endif # INSTALL_MOD_STRIP=1 914else 915mod_strip_cmd = true 916endif # INSTALL_MOD_STRIP 917export mod_strip_cmd 918 919# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 920# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 921# or CONFIG_MODULE_COMPRESS_XZ. 922 923mod_compress_cmd = true 924ifdef CONFIG_MODULE_COMPRESS 925 ifdef CONFIG_MODULE_COMPRESS_GZIP 926 mod_compress_cmd = gzip -n -f 927 endif # CONFIG_MODULE_COMPRESS_GZIP 928 ifdef CONFIG_MODULE_COMPRESS_XZ 929 mod_compress_cmd = xz -f 930 endif # CONFIG_MODULE_COMPRESS_XZ 931endif # CONFIG_MODULE_COMPRESS 932export mod_compress_cmd 933 934ifdef CONFIG_MODULE_SIG_ALL 935$(eval $(call config_filename,MODULE_SIG_KEY)) 936 937mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 938else 939mod_sign_cmd = true 940endif 941export mod_sign_cmd 942 943ifdef CONFIG_STACK_VALIDATION 944 has_libelf := $(call try-run,\ 945 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) 946 ifeq ($(has_libelf),1) 947 objtool_target := tools/objtool FORCE 948 else 949 SKIP_STACK_VALIDATION := 1 950 export SKIP_STACK_VALIDATION 951 endif 952endif 953 954PHONY += prepare0 955 956ifeq ($(KBUILD_EXTMOD),) 957core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 958 959vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 960 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 961 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 962 963vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 964 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) 965 966init-y := $(patsubst %/, %/built-in.a, $(init-y)) 967core-y := $(patsubst %/, %/built-in.a, $(core-y)) 968drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 969net-y := $(patsubst %/, %/built-in.a, $(net-y)) 970libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 971libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 972virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 973 974# Externally visible symbols (used by link-vmlinux.sh) 975export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 976 $(drivers-y) $(net-y) $(virt-y) 977export KBUILD_VMLINUX_LIBS := $(libs-y1) 978export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 979export LDFLAGS_vmlinux 980# used by scripts/package/Makefile 981export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) 982 983vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 984 985# Recurse until adjust_autoksyms.sh is satisfied 986PHONY += autoksyms_recursive 987autoksyms_recursive: $(vmlinux-deps) 988ifdef CONFIG_TRIM_UNUSED_KSYMS 989 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 990 "$(MAKE) -f $(srctree)/Makefile vmlinux" 991endif 992 993# For the kernel to actually contain only the needed exported symbols, 994# we have to build modules as well to determine what those symbols are. 995# (this can be evaluated only once include/config/auto.conf has been included) 996ifdef CONFIG_TRIM_UNUSED_KSYMS 997 KBUILD_MODULES := 1 998endif 999 1000autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1001 1002$(autoksyms_h): 1003 $(Q)mkdir -p $(dir $@) 1004 $(Q)touch $@ 1005 1006ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1007 1008# Final link of vmlinux with optional arch pass after final link 1009cmd_link-vmlinux = \ 1010 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1011 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1012 1013vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1014 +$(call if_changed,link-vmlinux) 1015 1016targets := vmlinux 1017 1018# Build samples along the rest of the kernel. This needs headers_install. 1019ifdef CONFIG_SAMPLES 1020vmlinux-dirs += samples 1021samples: headers_install 1022endif 1023 1024# The actual objects are generated when descending, 1025# make sure no implicit rule kicks in 1026$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 1027 1028# Handle descending into subdirectories listed in $(vmlinux-dirs) 1029# Preset locale variables to speed up the build process. Limit locale 1030# tweaks to this spot to avoid wrong language settings when running 1031# make menuconfig etc. 1032# Error messages still appears in the original language 1033 1034PHONY += $(vmlinux-dirs) 1035$(vmlinux-dirs): prepare 1036 $(Q)$(MAKE) $(build)=$@ need-builtin=1 1037 1038filechk_kernel.release = \ 1039 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1040 1041# Store (new) KERNELRELEASE string in include/config/kernel.release 1042include/config/kernel.release: $(srctree)/Makefile FORCE 1043 $(call filechk,kernel.release) 1044 1045# Additional helpers built in scripts/ 1046# Carefully list dependencies so we do not try to build scripts twice 1047# in parallel 1048PHONY += scripts 1049scripts: scripts_basic scripts_dtc 1050 $(Q)$(MAKE) $(build)=$(@) 1051 1052# Things we need to do before we recursively start building the kernel 1053# or the modules are listed in "prepare". 1054# A multi level approach is used. prepareN is processed before prepareN-1. 1055# archprepare is used in arch Makefiles and when processed asm symlink, 1056# version.h and scripts_basic is processed / created. 1057 1058PHONY += prepare archprepare prepare1 prepare3 1059 1060# prepare3 is used to check if we are building in a separate output directory, 1061# and if so do: 1062# 1) Check that make has not been executed in the kernel src $(srctree) 1063prepare3: include/config/kernel.release 1064ifneq ($(KBUILD_SRC),) 1065 @$(kecho) ' Using $(srctree) as source for kernel' 1066 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 1067 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1068 echo >&2 " in the '$(srctree)' directory.";\ 1069 /bin/false; \ 1070 fi; 1071endif 1072 1073prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ 1074 include/generated/utsrelease.h 1075 $(cmd_crmodverdir) 1076 1077archprepare: archheaders archscripts prepare1 scripts 1078 1079prepare0: archprepare 1080 $(Q)$(MAKE) $(build)=scripts/mod 1081 $(Q)$(MAKE) $(build)=. 1082 1083# All the preparing.. 1084prepare: prepare0 prepare-objtool 1085 1086# Support for using generic headers in asm-generic 1087asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1088 1089PHONY += asm-generic uapi-asm-generic 1090asm-generic: uapi-asm-generic 1091 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm 1092uapi-asm-generic: 1093 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm 1094 1095PHONY += prepare-objtool 1096prepare-objtool: $(objtool_target) 1097ifeq ($(SKIP_STACK_VALIDATION),1) 1098ifdef CONFIG_UNWINDER_ORC 1099 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1100 @false 1101else 1102 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1103endif 1104endif 1105 1106# Generate some files 1107# --------------------------------------------------------------------------- 1108 1109# KERNELRELEASE can change from a few different places, meaning version.h 1110# needs to be updated, so this check is forced on all builds 1111 1112uts_len := 64 1113define filechk_utsrelease.h 1114 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1115 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1116 exit 1; \ 1117 fi; \ 1118 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1119endef 1120 1121define filechk_version.h 1122 echo \#define LINUX_VERSION_CODE $(shell \ 1123 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1124 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 1125endef 1126 1127$(version_h): FORCE 1128 $(call filechk,version.h) 1129 $(Q)rm -f $(old_version_h) 1130 1131include/generated/utsrelease.h: include/config/kernel.release FORCE 1132 $(call filechk,utsrelease.h) 1133 1134PHONY += headerdep 1135headerdep: 1136 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1137 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1138 1139# --------------------------------------------------------------------------- 1140# Kernel headers 1141 1142#Default location for installed headers 1143export INSTALL_HDR_PATH = $(objtree)/usr 1144 1145# If we do an all arch process set dst to include/arch-$(SRCARCH) 1146hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) 1147 1148PHONY += archheaders archscripts 1149 1150PHONY += __headers 1151__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts 1152 $(Q)$(MAKE) $(build)=scripts build_unifdef 1153 1154PHONY += headers_install_all 1155headers_install_all: 1156 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1157 1158PHONY += headers_install 1159headers_install: __headers 1160 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1161 $(error Headers not exportable for the $(SRCARCH) architecture)) 1162 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include 1163 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) 1164 1165PHONY += headers_check_all 1166headers_check_all: headers_install_all 1167 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1168 1169PHONY += headers_check 1170headers_check: headers_install 1171 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 1172 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 1173 1174ifdef CONFIG_HEADERS_CHECK 1175all: headers_check 1176endif 1177 1178# --------------------------------------------------------------------------- 1179# Kernel selftest 1180 1181PHONY += kselftest 1182kselftest: 1183 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1184 1185PHONY += kselftest-clean 1186kselftest-clean: 1187 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean 1188 1189PHONY += kselftest-merge 1190kselftest-merge: 1191 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1192 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1193 -m $(objtree)/.config \ 1194 $(srctree)/tools/testing/selftests/*/config 1195 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1196 1197# --------------------------------------------------------------------------- 1198# Devicetree files 1199 1200ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1201dtstree := arch/$(SRCARCH)/boot/dts 1202endif 1203 1204ifneq ($(dtstree),) 1205 1206%.dtb: prepare3 scripts_dtc 1207 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1208 1209PHONY += dtbs dtbs_install dt_binding_check 1210dtbs dtbs_check: prepare3 scripts_dtc 1211 $(Q)$(MAKE) $(build)=$(dtstree) 1212 1213dtbs_check: export CHECK_DTBS=1 1214dtbs_check: dt_binding_check 1215 1216dtbs_install: 1217 $(Q)$(MAKE) $(dtbinst)=$(dtstree) 1218 1219ifdef CONFIG_OF_EARLY_FLATTREE 1220all: dtbs 1221endif 1222 1223endif 1224 1225PHONY += scripts_dtc 1226scripts_dtc: scripts_basic 1227 $(Q)$(MAKE) $(build)=scripts/dtc 1228 1229dt_binding_check: scripts_dtc 1230 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1231 1232# --------------------------------------------------------------------------- 1233# Modules 1234 1235ifdef CONFIG_MODULES 1236 1237# By default, build modules as well 1238 1239all: modules 1240 1241# Build modules 1242# 1243# A module can be listed more than once in obj-m resulting in 1244# duplicate lines in modules.order files. Those are removed 1245# using awk while concatenating to the final file. 1246 1247PHONY += modules 1248modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1249 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1250 @$(kecho) ' Building modules, stage 2.'; 1251 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1252 1253modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1254 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1255 1256%/modules.builtin: include/config/auto.conf include/config/tristate.conf 1257 $(Q)$(MAKE) $(modbuiltin)=$* 1258 1259 1260# Target to prepare building external modules 1261PHONY += modules_prepare 1262modules_prepare: prepare 1263 1264# Target to install modules 1265PHONY += modules_install 1266modules_install: _modinst_ _modinst_post 1267 1268PHONY += _modinst_ 1269_modinst_: 1270 @rm -rf $(MODLIB)/kernel 1271 @rm -f $(MODLIB)/source 1272 @mkdir -p $(MODLIB)/kernel 1273 @ln -s $(abspath $(srctree)) $(MODLIB)/source 1274 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1275 rm -f $(MODLIB)/build ; \ 1276 ln -s $(CURDIR) $(MODLIB)/build ; \ 1277 fi 1278 @cp -f $(objtree)/modules.order $(MODLIB)/ 1279 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1280 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1281 1282# This depmod is only for convenience to give the initial 1283# boot a modules.dep even before / is mounted read-write. However the 1284# boot script depmod is the master version. 1285PHONY += _modinst_post 1286_modinst_post: _modinst_ 1287 $(call cmd,depmod) 1288 1289ifeq ($(CONFIG_MODULE_SIG), y) 1290PHONY += modules_sign 1291modules_sign: 1292 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1293endif 1294 1295else # CONFIG_MODULES 1296 1297# Modules not configured 1298# --------------------------------------------------------------------------- 1299 1300PHONY += modules modules_install 1301modules modules_install: 1302 @echo >&2 1303 @echo >&2 "The present kernel configuration has modules disabled." 1304 @echo >&2 "Type 'make config' and enable loadable module support." 1305 @echo >&2 "Then build a kernel with module support enabled." 1306 @echo >&2 1307 @exit 1 1308 1309endif # CONFIG_MODULES 1310 1311### 1312# Cleaning is done on three levels. 1313# make clean Delete most generated files 1314# Leave enough to build external modules 1315# make mrproper Delete the current configuration, and all generated files 1316# make distclean Remove editor backup files, patch leftover files and the like 1317 1318# Directories & files removed with 'make clean' 1319CLEAN_DIRS += $(MODVERDIR) include/ksym 1320 1321# Directories & files removed with 'make mrproper' 1322MRPROPER_DIRS += include/config usr/include include/generated \ 1323 arch/*/include/generated .tmp_objdiff 1324MRPROPER_FILES += .config .config.old .version \ 1325 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1326 signing_key.pem signing_key.priv signing_key.x509 \ 1327 x509.genkey extra_certificates signing_key.x509.keyid \ 1328 signing_key.x509.signer vmlinux-gdb.py 1329 1330# clean - Delete most, but leave enough to build external modules 1331# 1332clean: rm-dirs := $(CLEAN_DIRS) 1333clean: rm-files := $(CLEAN_FILES) 1334clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1335 1336PHONY += $(clean-dirs) clean archclean vmlinuxclean 1337$(clean-dirs): 1338 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1339 1340vmlinuxclean: 1341 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1342 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1343 1344clean: archclean vmlinuxclean 1345 1346# mrproper - Delete all generated files, including .config 1347# 1348mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1349mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1350mrproper-dirs := $(addprefix _mrproper_,scripts) 1351 1352PHONY += $(mrproper-dirs) mrproper 1353$(mrproper-dirs): 1354 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1355 1356mrproper: clean $(mrproper-dirs) 1357 $(call cmd,rmdirs) 1358 $(call cmd,rmfiles) 1359 1360# distclean 1361# 1362PHONY += distclean 1363 1364distclean: mrproper 1365 @find $(srctree) $(RCS_FIND_IGNORE) \ 1366 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1367 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1368 -o -name 'core' \) \ 1369 -type f -print | xargs rm -f 1370 1371 1372# Packaging of the kernel to various formats 1373# --------------------------------------------------------------------------- 1374package-dir := scripts/package 1375 1376%src-pkg: FORCE 1377 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1378%pkg: include/config/kernel.release FORCE 1379 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1380 1381 1382# Brief documentation of the typical targets used 1383# --------------------------------------------------------------------------- 1384 1385boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1386boards := $(sort $(notdir $(boards))) 1387board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1388board-dirs := $(sort $(notdir $(board-dirs:/=))) 1389 1390PHONY += help 1391help: 1392 @echo 'Cleaning targets:' 1393 @echo ' clean - Remove most generated files but keep the config and' 1394 @echo ' enough build support to build external modules' 1395 @echo ' mrproper - Remove all generated files + config + various backup files' 1396 @echo ' distclean - mrproper + remove editor backup and patch files' 1397 @echo '' 1398 @echo 'Configuration targets:' 1399 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1400 @echo '' 1401 @echo 'Other generic targets:' 1402 @echo ' all - Build all targets marked with [*]' 1403 @echo '* vmlinux - Build the bare kernel' 1404 @echo '* modules - Build all modules' 1405 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1406 @echo ' dir/ - Build all files in dir and below' 1407 @echo ' dir/file.[ois] - Build specified target only' 1408 @echo ' dir/file.ll - Build the LLVM assembly file' 1409 @echo ' (requires compiler support for LLVM assembly generation)' 1410 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1411 @echo ' (requires a recent binutils and recent build (System.map))' 1412 @echo ' dir/file.ko - Build module including final link' 1413 @echo ' modules_prepare - Set up for building external modules' 1414 @echo ' tags/TAGS - Generate tags file for editors' 1415 @echo ' cscope - Generate cscope index' 1416 @echo ' gtags - Generate GNU GLOBAL index' 1417 @echo ' kernelrelease - Output the release version string (use with make -s)' 1418 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1419 @echo ' image_name - Output the image name (use with make -s)' 1420 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1421 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1422 echo '' 1423 @echo 'Static analysers:' 1424 @echo ' checkstack - Generate a list of stack hogs' 1425 @echo ' namespacecheck - Name space analysis on compiled kernel' 1426 @echo ' versioncheck - Sanity check on version.h usage' 1427 @echo ' includecheck - Check for duplicate included header files' 1428 @echo ' export_report - List the usages of all exported symbols' 1429 @echo ' headers_check - Sanity check on exported headers' 1430 @echo ' headerdep - Detect inclusion cycles in headers' 1431 @echo ' coccicheck - Check with Coccinelle' 1432 @echo '' 1433 @echo 'Kernel selftest:' 1434 @echo ' kselftest - Build and run kernel selftest (run as root)' 1435 @echo ' Build, install, and boot kernel before' 1436 @echo ' running kselftest on it' 1437 @echo ' kselftest-clean - Remove all generated kselftest files' 1438 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1439 @echo ' .config.' 1440 @echo '' 1441 @$(if $(dtstree), \ 1442 echo 'Devicetree:'; \ 1443 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1444 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1445 echo '') 1446 1447 @echo 'Userspace tools targets:' 1448 @echo ' use "make tools/help"' 1449 @echo ' or "cd tools; make help"' 1450 @echo '' 1451 @echo 'Kernel packaging:' 1452 @$(MAKE) $(build)=$(package-dir) help 1453 @echo '' 1454 @echo 'Documentation targets:' 1455 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1456 @echo '' 1457 @echo 'Architecture specific targets ($(SRCARCH)):' 1458 @$(if $(archhelp),$(archhelp),\ 1459 echo ' No architecture specific help defined for $(SRCARCH)') 1460 @echo '' 1461 @$(if $(boards), \ 1462 $(foreach b, $(boards), \ 1463 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1464 echo '') 1465 @$(if $(board-dirs), \ 1466 $(foreach b, $(board-dirs), \ 1467 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1468 printf " %-16s - Show all of the above\\n" help-boards; \ 1469 echo '') 1470 1471 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1472 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1473 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1474 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' 1475 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1476 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1477 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1478 @echo ' 1: warnings which may be relevant and do not occur too often' 1479 @echo ' 2: warnings which occur quite often but may still be relevant' 1480 @echo ' 3: more obscure warnings, can most likely be ignored' 1481 @echo ' Multiple levels can be combined with W=12 or W=123' 1482 @echo '' 1483 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1484 @echo 'For further info see the ./README file' 1485 1486 1487help-board-dirs := $(addprefix help-,$(board-dirs)) 1488 1489help-boards: $(help-board-dirs) 1490 1491boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1492 1493$(help-board-dirs): help-%: 1494 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1495 @$(if $(boards-per-dir), \ 1496 $(foreach b, $(boards-per-dir), \ 1497 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1498 echo '') 1499 1500 1501# Documentation targets 1502# --------------------------------------------------------------------------- 1503DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1504 linkcheckdocs dochelp refcheckdocs 1505PHONY += $(DOC_TARGETS) 1506$(DOC_TARGETS): scripts_basic FORCE 1507 $(Q)$(MAKE) $(build)=Documentation $@ 1508 1509# Misc 1510# --------------------------------------------------------------------------- 1511 1512PHONY += scripts_gdb 1513scripts_gdb: prepare 1514 $(Q)$(MAKE) $(build)=scripts/gdb 1515 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1516 1517ifdef CONFIG_GDB_SCRIPTS 1518all: scripts_gdb 1519endif 1520 1521else # KBUILD_EXTMOD 1522 1523### 1524# External module support. 1525# When building external modules the kernel used as basis is considered 1526# read-only, and no consistency checks are made and the make 1527# system is not used on the basis kernel. If updates are required 1528# in the basis kernel ordinary make commands (without M=...) must 1529# be used. 1530# 1531# The following are the only valid targets when building external 1532# modules. 1533# make M=dir clean Delete all automatically generated files 1534# make M=dir modules Make all modules in specified dir 1535# make M=dir Same as 'make M=dir modules' 1536# make M=dir modules_install 1537# Install the modules built in the module directory 1538# Assumes install directory is already created 1539 1540# We are always building modules 1541KBUILD_MODULES := 1 1542 1543PHONY += $(objtree)/Module.symvers 1544$(objtree)/Module.symvers: 1545 @test -e $(objtree)/Module.symvers || ( \ 1546 echo; \ 1547 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1548 echo " is missing; modules will have no dependencies and modversions."; \ 1549 echo ) 1550 1551module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1552PHONY += $(module-dirs) modules 1553$(module-dirs): prepare $(objtree)/Module.symvers 1554 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1555 1556modules: $(module-dirs) 1557 @$(kecho) ' Building modules, stage 2.'; 1558 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1559 1560PHONY += modules_install 1561modules_install: _emodinst_ _emodinst_post 1562 1563install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1564PHONY += _emodinst_ 1565_emodinst_: 1566 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1567 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1568 1569PHONY += _emodinst_post 1570_emodinst_post: _emodinst_ 1571 $(call cmd,depmod) 1572 1573clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1574 1575PHONY += $(clean-dirs) clean 1576$(clean-dirs): 1577 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1578 1579clean: rm-dirs := $(MODVERDIR) 1580clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1581 1582PHONY += help 1583help: 1584 @echo ' Building external modules.' 1585 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1586 @echo '' 1587 @echo ' modules - default target, build the module(s)' 1588 @echo ' modules_install - install the module' 1589 @echo ' clean - remove generated files in module directory only' 1590 @echo '' 1591 1592PHONY += prepare 1593prepare: 1594 $(cmd_crmodverdir) 1595endif # KBUILD_EXTMOD 1596 1597clean: $(clean-dirs) 1598 $(call cmd,rmdirs) 1599 $(call cmd,rmfiles) 1600 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1601 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1602 -o -name '*.ko.*' \ 1603 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1604 -o -name '*.dwo' -o -name '*.lst' \ 1605 -o -name '*.su' \ 1606 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1607 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1608 -o -name '*.asn1.[ch]' \ 1609 -o -name '*.symtypes' -o -name 'modules.order' \ 1610 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1611 -o -name '*.c.[012]*.*' \ 1612 -o -name '*.ll' \ 1613 -o -name '*.gcno' \) -type f -print | xargs rm -f 1614 1615# Generate tags for editors 1616# --------------------------------------------------------------------------- 1617quiet_cmd_tags = GEN $@ 1618 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1619 1620tags TAGS cscope gtags: FORCE 1621 $(call cmd,tags) 1622 1623# Scripts to check various things for consistency 1624# --------------------------------------------------------------------------- 1625 1626PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1627 1628includecheck: 1629 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1630 -name '*.[hcS]' -type f -print | sort \ 1631 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1632 1633versioncheck: 1634 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1635 -name '*.[hcS]' -type f -print | sort \ 1636 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1637 1638coccicheck: 1639 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1640 1641namespacecheck: 1642 $(PERL) $(srctree)/scripts/namespace.pl 1643 1644export_report: 1645 $(PERL) $(srctree)/scripts/export_report.pl 1646 1647PHONY += checkstack kernelrelease kernelversion image_name 1648 1649# UML needs a little special treatment here. It wants to use the host 1650# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1651# else wants $(ARCH), including people doing cross-builds, which means 1652# that $(SUBARCH) doesn't work here. 1653ifeq ($(ARCH), um) 1654CHECKSTACK_ARCH := $(SUBARCH) 1655else 1656CHECKSTACK_ARCH := $(ARCH) 1657endif 1658checkstack: 1659 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1660 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1661 1662kernelrelease: 1663 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1664 1665kernelversion: 1666 @echo $(KERNELVERSION) 1667 1668image_name: 1669 @echo $(KBUILD_IMAGE) 1670 1671# Clear a bunch of variables before executing the submake 1672 1673ifeq ($(quiet),silent_) 1674tools_silent=s 1675endif 1676 1677tools/: FORCE 1678 $(Q)mkdir -p $(objtree)/tools 1679 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ 1680 1681tools/%: FORCE 1682 $(Q)mkdir -p $(objtree)/tools 1683 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* 1684 1685# Single targets 1686# --------------------------------------------------------------------------- 1687# Single targets are compatible with: 1688# - build with mixed source and output 1689# - build with separate output dir 'make O=...' 1690# - external modules 1691# 1692# target-dir => where to store outputfile 1693# build-dir => directory in kernel source tree to use 1694 1695build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ 1696build-dir = $(patsubst %/,%,$(dir $(build-target))) 1697 1698%.i: prepare FORCE 1699 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1700%.ll: prepare FORCE 1701 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1702%.lst: prepare FORCE 1703 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1704%.o: prepare FORCE 1705 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1706%.s: prepare FORCE 1707 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1708%.symtypes: prepare FORCE 1709 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1710%.ko: %.o 1711 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1712 1713# Modules 1714PHONY += / 1715/: ./ 1716 1717# Make sure the latest headers are built for Documentation 1718Documentation/ samples/: headers_install 1719%/: prepare FORCE 1720 $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) 1721 1722# FIXME Should go into a make.lib or something 1723# =========================================================================== 1724 1725quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1726 cmd_rmdirs = rm -rf $(rm-dirs) 1727 1728quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1729 cmd_rmfiles = rm -f $(rm-files) 1730 1731# Run depmod only if we have System.map and depmod is executable 1732quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1733 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1734 $(KERNELRELEASE) 1735 1736# Create temporary dir for module support files 1737# clean it up only when building all modules 1738cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1739 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1740 1741# read saved command lines for existing targets 1742existing-targets := $(wildcard $(sort $(targets))) 1743 1744-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1745 1746endif # ifeq ($(config-targets),1) 1747endif # ifeq ($(mixed-targets),1) 1748endif # sub-make-done 1749 1750PHONY += FORCE 1751FORCE: 1752 1753# Declare the contents of the PHONY variable as phony. We keep that 1754# information in a variable so we can use it in if_changed and friends. 1755.PHONY: $(PHONY) 1756