1VERSION = 4 2PATCHLEVEL = 11 3SUBLEVEL = 0 4EXTRAVERSION = 5NAME = Fearless Coyote 6 7# *DOCUMENTATION* 8# To see a list of typical targets execute "make help" 9# More info can be located in ./README 10# Comments in this file are targeted only to the developer, do not 11# expect to learn how to build the kernel reading this file. 12 13# o Do not use make's built-in rules and variables 14# (this increases performance and avoids hard-to-debug behaviour); 15# o Look for make include files relative to root of kernel src 16MAKEFLAGS += -rR --include-dir=$(CURDIR) 17 18# Avoid funny character set dependencies 19unexport LC_ALL 20LC_COLLATE=C 21LC_NUMERIC=C 22export LC_COLLATE LC_NUMERIC 23 24# Avoid interference with shell env settings 25unexport GREP_OPTIONS 26 27# We are using a recursive build, so we need to do a little thinking 28# to get the ordering right. 29# 30# Most importantly: sub-Makefiles should only ever modify files in 31# their own directory. If in some directory we have a dependency on 32# a file in another dir (which doesn't happen often, but it's often 33# unavoidable when linking the built-in.o targets which finally 34# turn into vmlinux), we will call a sub make in that other dir, and 35# after that we are sure that everything which is in that other dir 36# is now up to date. 37# 38# The only cases where we need to modify files which have global 39# effects are thus separated out and done before the recursive 40# descending is started. They are now explicitly listed as the 41# prepare rule. 42 43# Beautify output 44# --------------------------------------------------------------------------- 45# 46# Normally, we echo the whole command before executing it. By making 47# that echo $($(quiet)$(cmd)), we now have the possibility to set 48# $(quiet) to choose other forms of output instead, e.g. 49# 50# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 51# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 52# 53# If $(quiet) is empty, the whole command will be printed. 54# If it is set to "quiet_", only the short version will be printed. 55# If it is set to "silent_", nothing will be printed at all, since 56# the variable $(silent_cmd_cc_o_c) doesn't exist. 57# 58# A simple variant is to prefix commands with $(Q) - that's useful 59# for commands that shall be hidden in non-verbose mode. 60# 61# $(Q)ln $@ :< 62# 63# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 64# If KBUILD_VERBOSE equals 1 then the above command is displayed. 65# 66# To put more focus on warnings, be less verbose as default 67# Use 'make V=1' to see the full commands 68 69ifeq ("$(origin V)", "command line") 70 KBUILD_VERBOSE = $(V) 71endif 72ifndef KBUILD_VERBOSE 73 KBUILD_VERBOSE = 0 74endif 75 76ifeq ($(KBUILD_VERBOSE),1) 77 quiet = 78 Q = 79else 80 quiet=quiet_ 81 Q = @ 82endif 83 84# If the user is running make -s (silent mode), suppress echoing of 85# commands 86 87ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 88ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) 89 quiet=silent_ 90 tools_silent=s 91endif 92else # make-3.8x 93ifneq ($(filter s% -s%,$(MAKEFLAGS)),) 94 quiet=silent_ 95 tools_silent=-s 96endif 97endif 98 99export quiet Q KBUILD_VERBOSE 100 101# kbuild supports saving output files in a separate directory. 102# To locate output files in a separate directory two syntaxes are supported. 103# In both cases the working directory must be the root of the kernel src. 104# 1) O= 105# Use "make O=dir/to/store/output/files/" 106# 107# 2) Set KBUILD_OUTPUT 108# Set the environment variable KBUILD_OUTPUT to point to the directory 109# where the output files shall be placed. 110# export KBUILD_OUTPUT=dir/to/store/output/files/ 111# make 112# 113# The O= assignment takes precedence over the KBUILD_OUTPUT environment 114# variable. 115 116# KBUILD_SRC is set on invocation of make in OBJ directory 117# KBUILD_SRC is not intended to be used by the regular user (for now) 118ifeq ($(KBUILD_SRC),) 119 120# OK, Make called in directory where kernel src resides 121# Do we want to locate output files in a separate directory? 122ifeq ("$(origin O)", "command line") 123 KBUILD_OUTPUT := $(O) 124endif 125 126# That's our default target when none is given on the command line 127PHONY := _all 128_all: 129 130# Cancel implicit rules on top Makefile 131$(CURDIR)/Makefile Makefile: ; 132 133ifneq ($(words $(subst :, ,$(CURDIR))), 1) 134 $(error main directory cannot contain spaces nor colons) 135endif 136 137ifneq ($(KBUILD_OUTPUT),) 138# Invoke a second make in the output directory, passing relevant variables 139# check that the output directory actually exists 140saved-output := $(KBUILD_OUTPUT) 141KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ 142 && /bin/pwd) 143$(if $(KBUILD_OUTPUT),, \ 144 $(error failed to create output directory "$(saved-output)")) 145 146PHONY += $(MAKECMDGOALS) sub-make 147 148$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 149 @: 150 151sub-make: 152 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ 153 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) 154 155# Leave processing to above invocation of make 156skip-makefile := 1 157endif # ifneq ($(KBUILD_OUTPUT),) 158endif # ifeq ($(KBUILD_SRC),) 159 160# We process the rest of the Makefile if this is the final invocation of make 161ifeq ($(skip-makefile),) 162 163# Do not print "Entering directory ...", 164# but we want to display it when entering to the output directory 165# so that IDEs/editors are able to understand relative filenames. 166MAKEFLAGS += --no-print-directory 167 168# Call a source code checker (by default, "sparse") as part of the 169# C compilation. 170# 171# Use 'make C=1' to enable checking of only re-compiled files. 172# Use 'make C=2' to enable checking of *all* source files, regardless 173# of whether they are re-compiled or not. 174# 175# See the file "Documentation/dev-tools/sparse.rst" for more details, 176# including where to get the "sparse" utility. 177 178ifeq ("$(origin C)", "command line") 179 KBUILD_CHECKSRC = $(C) 180endif 181ifndef KBUILD_CHECKSRC 182 KBUILD_CHECKSRC = 0 183endif 184 185# Use make M=dir to specify directory of external module to build 186# Old syntax make ... SUBDIRS=$PWD is still supported 187# Setting the environment variable KBUILD_EXTMOD take precedence 188ifdef SUBDIRS 189 KBUILD_EXTMOD ?= $(SUBDIRS) 190endif 191 192ifeq ("$(origin M)", "command line") 193 KBUILD_EXTMOD := $(M) 194endif 195 196# If building an external module we do not care about the all: rule 197# but instead _all depend on modules 198PHONY += all 199ifeq ($(KBUILD_EXTMOD),) 200_all: all 201else 202_all: modules 203endif 204 205ifeq ($(KBUILD_SRC),) 206 # building in the source tree 207 srctree := . 208else 209 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 210 # building in a subdirectory of the source tree 211 srctree := .. 212 else 213 srctree := $(KBUILD_SRC) 214 endif 215endif 216objtree := . 217src := $(srctree) 218obj := $(objtree) 219 220VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 221 222export srctree objtree VPATH 223 224# SUBARCH tells the usermode build what the underlying arch is. That is set 225# first, and if a usermode build is happening, the "ARCH=um" on the command 226# line overrides the setting of ARCH below. If a native build is happening, 227# then ARCH is assigned, getting whatever value it gets normally, and 228# SUBARCH is subsequently ignored. 229 230SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ 231 -e s/sun4u/sparc64/ \ 232 -e s/arm.*/arm/ -e s/sa110/arm/ \ 233 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 234 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 235 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) 236 237# Cross compiling and selecting different set of gcc/bin-utils 238# --------------------------------------------------------------------------- 239# 240# When performing cross compilation for other architectures ARCH shall be set 241# to the target architecture. (See arch/* for the possibilities). 242# ARCH can be set during invocation of make: 243# make ARCH=ia64 244# Another way is to have ARCH set in the environment. 245# The default ARCH is the host where make is executed. 246 247# CROSS_COMPILE specify the prefix used for all executables used 248# during compilation. Only gcc and related bin-utils executables 249# are prefixed with $(CROSS_COMPILE). 250# CROSS_COMPILE can be set on the command line 251# make CROSS_COMPILE=ia64-linux- 252# Alternatively CROSS_COMPILE can be set in the environment. 253# A third alternative is to store a setting in .config so that plain 254# "make" in the configured kernel build directory always uses that. 255# Default value for CROSS_COMPILE is not to prefix executables 256# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 257ARCH ?= $(SUBARCH) 258CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 259 260# Architecture as present in compile.h 261UTS_MACHINE := $(ARCH) 262SRCARCH := $(ARCH) 263 264# Additional ARCH settings for x86 265ifeq ($(ARCH),i386) 266 SRCARCH := x86 267endif 268ifeq ($(ARCH),x86_64) 269 SRCARCH := x86 270endif 271 272# Additional ARCH settings for sparc 273ifeq ($(ARCH),sparc32) 274 SRCARCH := sparc 275endif 276ifeq ($(ARCH),sparc64) 277 SRCARCH := sparc 278endif 279 280# Additional ARCH settings for sh 281ifeq ($(ARCH),sh64) 282 SRCARCH := sh 283endif 284 285# Additional ARCH settings for tile 286ifeq ($(ARCH),tilepro) 287 SRCARCH := tile 288endif 289ifeq ($(ARCH),tilegx) 290 SRCARCH := tile 291endif 292 293# Where to locate arch specific headers 294hdr-arch := $(SRCARCH) 295 296KCONFIG_CONFIG ?= .config 297export KCONFIG_CONFIG 298 299# SHELL used by kbuild 300CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 301 else if [ -x /bin/bash ]; then echo /bin/bash; \ 302 else echo sh; fi ; fi) 303 304HOSTCC = gcc 305HOSTCXX = g++ 306HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 307HOSTCXXFLAGS = -O2 308 309ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) 310HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ 311 -Wno-missing-field-initializers -fno-delete-null-pointer-checks 312endif 313 314# Decide whether to build built-in, modular, or both. 315# Normally, just do built-in. 316 317KBUILD_MODULES := 318KBUILD_BUILTIN := 1 319 320# If we have only "make modules", don't compile built-in objects. 321# When we're building modules with modversions, we need to consider 322# the built-in objects during the descend as well, in order to 323# make sure the checksums are up to date before we record them. 324 325ifeq ($(MAKECMDGOALS),modules) 326 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 327endif 328 329# If we have "make <whatever> modules", compile modules 330# in addition to whatever we do anyway. 331# Just "make" or "make all" shall build modules as well 332 333ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 334 KBUILD_MODULES := 1 335endif 336 337ifeq ($(MAKECMDGOALS),) 338 KBUILD_MODULES := 1 339endif 340 341export KBUILD_MODULES KBUILD_BUILTIN 342export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 343 344# We need some generic definitions (do not try to remake the file). 345scripts/Kbuild.include: ; 346include scripts/Kbuild.include 347 348# Make variables (CC, etc...) 349AS = $(CROSS_COMPILE)as 350LD = $(CROSS_COMPILE)ld 351CC = $(CROSS_COMPILE)gcc 352CPP = $(CC) -E 353AR = $(CROSS_COMPILE)ar 354NM = $(CROSS_COMPILE)nm 355STRIP = $(CROSS_COMPILE)strip 356OBJCOPY = $(CROSS_COMPILE)objcopy 357OBJDUMP = $(CROSS_COMPILE)objdump 358AWK = awk 359GENKSYMS = scripts/genksyms/genksyms 360INSTALLKERNEL := installkernel 361DEPMOD = /sbin/depmod 362PERL = perl 363PYTHON = python 364CHECK = sparse 365 366CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 367 -Wbitwise -Wno-return-void $(CF) 368NOSTDINC_FLAGS = 369CFLAGS_MODULE = 370AFLAGS_MODULE = 371LDFLAGS_MODULE = 372CFLAGS_KERNEL = 373AFLAGS_KERNEL = 374LDFLAGS_vmlinux = 375CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,) 376CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) 377 378 379# Use USERINCLUDE when you must reference the UAPI directories only. 380USERINCLUDE := \ 381 -I$(srctree)/arch/$(hdr-arch)/include/uapi \ 382 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ 383 -I$(srctree)/include/uapi \ 384 -I$(objtree)/include/generated/uapi \ 385 -include $(srctree)/include/linux/kconfig.h 386 387# Use LINUXINCLUDE when you must reference the include/ directory. 388# Needed to be compatible with the O= option 389LINUXINCLUDE := \ 390 -I$(srctree)/arch/$(hdr-arch)/include \ 391 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ 392 -I$(objtree)/arch/$(hdr-arch)/include/generated \ 393 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 394 -I$(objtree)/include 395 396LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE)) 397 398KBUILD_CPPFLAGS := -D__KERNEL__ 399 400KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 401 -fno-strict-aliasing -fno-common \ 402 -Werror-implicit-function-declaration \ 403 -Wno-format-security \ 404 -std=gnu89 $(call cc-option,-fno-PIE) 405 406 407KBUILD_AFLAGS_KERNEL := 408KBUILD_CFLAGS_KERNEL := 409KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE) 410KBUILD_AFLAGS_MODULE := -DMODULE 411KBUILD_CFLAGS_MODULE := -DMODULE 412KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 413 414# Read KERNELRELEASE from include/config/kernel.release (if it exists) 415KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 416KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 417 418export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 419export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 420export CPP AR NM STRIP OBJCOPY OBJDUMP 421export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE 422export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 423 424export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 425export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN 426export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 427export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 428export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 429export KBUILD_ARFLAGS 430 431# When compiling out-of-tree modules, put MODVERDIR in the module 432# tree rather than in the kernel tree. The kernel tree might 433# even be read-only. 434export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 435 436# Files to ignore in find ... statements 437 438export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 439 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 440 -prune -o 441export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 442 --exclude CVS --exclude .pc --exclude .hg --exclude .git 443 444# =========================================================================== 445# Rules shared between *config targets and build targets 446 447# Basic helpers built in scripts/ 448PHONY += scripts_basic 449scripts_basic: 450 $(Q)$(MAKE) $(build)=scripts/basic 451 $(Q)rm -f .tmp_quiet_recordmcount 452 453# To avoid any implicit rule to kick in, define an empty command. 454scripts/basic/%: scripts_basic ; 455 456PHONY += outputmakefile 457# outputmakefile generates a Makefile in the output directory, if using a 458# separate output directory. This allows convenient use of make in the 459# output directory. 460outputmakefile: 461ifneq ($(KBUILD_SRC),) 462 $(Q)ln -fsn $(srctree) source 463 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 464 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 465endif 466 467# Support for using generic headers in asm-generic 468PHONY += asm-generic 469asm-generic: 470 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 471 src=asm obj=arch/$(SRCARCH)/include/generated/asm 472 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 473 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 474 475# To make sure we do not include .config for any of the *config targets 476# catch them early, and hand them over to scripts/kconfig/Makefile 477# It is allowed to specify more targets when calling make, including 478# mixing *config targets and build targets. 479# For example 'make oldconfig all'. 480# Detect when mixed targets is specified, and make a second invocation 481# of make so .config is not included in this case either (for *config). 482 483version_h := include/generated/uapi/linux/version.h 484old_version_h := include/linux/version.h 485 486no-dot-config-targets := clean mrproper distclean \ 487 cscope gtags TAGS tags help% %docs check% coccicheck \ 488 $(version_h) headers_% archheaders archscripts \ 489 kernelversion %src-pkg 490 491config-targets := 0 492mixed-targets := 0 493dot-config := 1 494 495ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 496 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 497 dot-config := 0 498 endif 499endif 500 501ifeq ($(KBUILD_EXTMOD),) 502 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 503 config-targets := 1 504 ifneq ($(words $(MAKECMDGOALS)),1) 505 mixed-targets := 1 506 endif 507 endif 508endif 509# install and module_install need also be processed one by one 510ifneq ($(filter install,$(MAKECMDGOALS)),) 511 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 512 mixed-targets := 1 513 endif 514endif 515 516ifeq ($(mixed-targets),1) 517# =========================================================================== 518# We're called with mixed targets (*config and build targets). 519# Handle them one by one. 520 521PHONY += $(MAKECMDGOALS) __build_one_by_one 522 523$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 524 @: 525 526__build_one_by_one: 527 $(Q)set -e; \ 528 for i in $(MAKECMDGOALS); do \ 529 $(MAKE) -f $(srctree)/Makefile $$i; \ 530 done 531 532else 533ifeq ($(config-targets),1) 534# =========================================================================== 535# *config targets only - make sure prerequisites are updated, and descend 536# in scripts/kconfig to make the *config target 537 538# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 539# KBUILD_DEFCONFIG may point out an alternative default configuration 540# used for 'make defconfig' 541include arch/$(SRCARCH)/Makefile 542export KBUILD_DEFCONFIG KBUILD_KCONFIG 543 544config: scripts_basic outputmakefile FORCE 545 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 546 547%config: scripts_basic outputmakefile FORCE 548 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 549 550else 551# =========================================================================== 552# Build targets only - this includes vmlinux, arch specific targets, clean 553# targets and others. In general all targets except *config targets. 554 555ifeq ($(KBUILD_EXTMOD),) 556# Additional helpers built in scripts/ 557# Carefully list dependencies so we do not try to build scripts twice 558# in parallel 559PHONY += scripts 560scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ 561 asm-generic gcc-plugins 562 $(Q)$(MAKE) $(build)=$(@) 563 564# Objects we will link into vmlinux / subdirs we need to visit 565init-y := init/ 566drivers-y := drivers/ sound/ firmware/ 567net-y := net/ 568libs-y := lib/ 569core-y := usr/ 570virt-y := virt/ 571endif # KBUILD_EXTMOD 572 573ifeq ($(dot-config),1) 574# Read in config 575-include include/config/auto.conf 576 577ifeq ($(KBUILD_EXTMOD),) 578# Read in dependencies to all Kconfig* files, make sure to run 579# oldconfig if changes are detected. 580-include include/config/auto.conf.cmd 581 582# To avoid any implicit rule to kick in, define an empty command 583$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 584 585# If .config is newer than include/config/auto.conf, someone tinkered 586# with it and forgot to run make oldconfig. 587# if auto.conf.cmd is missing then we are probably in a cleaned tree so 588# we execute the config step to be sure to catch updated Kconfig files 589include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 590 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 591else 592# external modules needs include/generated/autoconf.h and include/config/auto.conf 593# but do not care if they are up-to-date. Use auto.conf to trigger the test 594PHONY += include/config/auto.conf 595 596include/config/auto.conf: 597 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 598 echo >&2; \ 599 echo >&2 " ERROR: Kernel configuration is invalid."; \ 600 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 601 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 602 echo >&2 ; \ 603 /bin/false) 604 605endif # KBUILD_EXTMOD 606 607else 608# Dummy target needed, because used as prerequisite 609include/config/auto.conf: ; 610endif # $(dot-config) 611 612# For the kernel to actually contain only the needed exported symbols, 613# we have to build modules as well to determine what those symbols are. 614# (this can be evaluated only once include/config/auto.conf has been included) 615ifdef CONFIG_TRIM_UNUSED_KSYMS 616 KBUILD_MODULES := 1 617endif 618 619# The all: target is the default when no target is given on the 620# command line. 621# This allow a user to issue only 'make' to build a kernel including modules 622# Defaults to vmlinux, but the arch makefile usually adds further targets 623all: vmlinux 624 625# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 626# values of the respective KBUILD_* variables 627ARCH_CPPFLAGS := 628ARCH_AFLAGS := 629ARCH_CFLAGS := 630include arch/$(SRCARCH)/Makefile 631 632KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 633KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 634 635ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 636KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) 637KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) 638endif 639 640ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 641KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) 642else 643ifdef CONFIG_PROFILE_ALL_BRANCHES 644KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) 645else 646KBUILD_CFLAGS += -O2 647endif 648endif 649 650KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ 651 $(call cc-disable-warning,maybe-uninitialized,)) 652 653# Tell gcc to never replace conditional load with a non-conditional one 654KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 655 656# check for 'asm goto' 657ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) 658 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 659 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO 660endif 661 662include scripts/Makefile.gcc-plugins 663 664ifdef CONFIG_READABLE_ASM 665# Disable optimizations that make assembler listings hard to read. 666# reorder blocks reorders the control in the function 667# ipa clone creates specialized cloned functions 668# partial inlining inlines only parts of functions 669KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 670 $(call cc-option,-fno-ipa-cp-clone,) \ 671 $(call cc-option,-fno-partial-inlining) 672endif 673 674ifneq ($(CONFIG_FRAME_WARN),0) 675KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 676endif 677 678# This selects the stack protector compiler flag. Testing it is delayed 679# until after .config has been reprocessed, in the prepare-compiler-check 680# target. 681ifdef CONFIG_CC_STACKPROTECTOR_REGULAR 682 stackp-flag := -fstack-protector 683 stackp-name := REGULAR 684else 685ifdef CONFIG_CC_STACKPROTECTOR_STRONG 686 stackp-flag := -fstack-protector-strong 687 stackp-name := STRONG 688else 689 # Force off for distro compilers that enable stack protector by default. 690 stackp-flag := $(call cc-option, -fno-stack-protector) 691endif 692endif 693# Find arch-specific stack protector compiler sanity-checking script. 694ifdef CONFIG_CC_STACKPROTECTOR 695 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh 696 stackp-check := $(wildcard $(stackp-path)) 697endif 698KBUILD_CFLAGS += $(stackp-flag) 699 700ifeq ($(cc-name),clang) 701KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 702KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) 703KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) 704KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 705KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 706# Quiet clang warning: comparison of unsigned expression < 0 is always false 707KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 708# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 709# source of a reference will be _MergedGlobals and not on of the whitelisted names. 710# See modpost pattern 2 711KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 712KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 713else 714 715# These warnings generated too much noise in a regular build. 716# Use make W=1 to enable them (see scripts/Makefile.build) 717KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 718KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 719endif 720 721ifdef CONFIG_FRAME_POINTER 722KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 723else 724# Some targets (ARM with Thumb2, for example), can't be built with frame 725# pointers. For those, we don't have FUNCTION_TRACER automatically 726# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 727# incompatible with -fomit-frame-pointer with current GCC, so we don't use 728# -fomit-frame-pointer with FUNCTION_TRACER. 729ifndef CONFIG_FUNCTION_TRACER 730KBUILD_CFLAGS += -fomit-frame-pointer 731endif 732endif 733 734KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 735 736ifdef CONFIG_DEBUG_INFO 737ifdef CONFIG_DEBUG_INFO_SPLIT 738KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 739else 740KBUILD_CFLAGS += -g 741endif 742KBUILD_AFLAGS += -Wa,-gdwarf-2 743endif 744ifdef CONFIG_DEBUG_INFO_DWARF4 745KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 746endif 747 748ifdef CONFIG_DEBUG_INFO_REDUCED 749KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 750 $(call cc-option,-fno-var-tracking) 751endif 752 753ifdef CONFIG_FUNCTION_TRACER 754ifndef CC_FLAGS_FTRACE 755CC_FLAGS_FTRACE := -pg 756endif 757export CC_FLAGS_FTRACE 758ifdef CONFIG_HAVE_FENTRY 759CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 760endif 761KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) 762KBUILD_AFLAGS += $(CC_USING_FENTRY) 763ifdef CONFIG_DYNAMIC_FTRACE 764 ifdef CONFIG_HAVE_C_RECORDMCOUNT 765 BUILD_C_RECORDMCOUNT := y 766 export BUILD_C_RECORDMCOUNT 767 endif 768endif 769endif 770 771# We trigger additional mismatches with less inlining 772ifdef CONFIG_DEBUG_SECTION_MISMATCH 773KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 774endif 775 776# arch Makefile may override CC so keep this after arch Makefile is included 777NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 778CHECKFLAGS += $(NOSTDINC_FLAGS) 779 780# warn about C99 declaration after statement 781KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 782 783# disable pointer signed / unsigned warnings in gcc 4.0 784KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 785 786# disable invalid "can't wrap" optimizations for signed / pointers 787KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 788 789# conserve stack if available 790KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 791 792# disallow errors like 'EXPORT_GPL(foo);' with missing header 793KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 794 795# require functions to have arguments in prototypes, not empty 'int foo()' 796KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 797 798# Prohibit date/time macros, which would make the build non-deterministic 799KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 800 801# enforce correct pointer usage 802KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 803 804# use the deterministic mode of AR if available 805KBUILD_ARFLAGS := $(call ar-option,D) 806 807include scripts/Makefile.kasan 808include scripts/Makefile.extrawarn 809include scripts/Makefile.ubsan 810 811# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 812# last assignments 813KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 814KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 815KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 816 817# Use --build-id when available. 818LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 819 $(call cc-ldoption, -Wl$(comma)--build-id,)) 820KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 821LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 822 823ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 824LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) 825endif 826 827ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 828LDFLAGS_vmlinux += $(call ld-option, -X,) 829endif 830 831# Default kernel image to build when no specific target is given. 832# KBUILD_IMAGE may be overruled on the command line or 833# set in the environment 834# Also any assignments in arch/$(ARCH)/Makefile take precedence over 835# this default value 836export KBUILD_IMAGE ?= vmlinux 837 838# 839# INSTALL_PATH specifies where to place the updated kernel and system map 840# images. Default is /boot, but you can set it to other values 841export INSTALL_PATH ?= /boot 842 843# 844# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 845# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 846# an argument if needed. Otherwise it defaults to the kernel install path 847# 848export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 849 850# 851# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 852# relocations required by build roots. This is not defined in the 853# makefile but the argument can be passed to make if needed. 854# 855 856MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 857export MODLIB 858 859# 860# INSTALL_MOD_STRIP, if defined, will cause modules to be 861# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 862# the default option --strip-debug will be used. Otherwise, 863# INSTALL_MOD_STRIP value will be used as the options to the strip command. 864 865ifdef INSTALL_MOD_STRIP 866ifeq ($(INSTALL_MOD_STRIP),1) 867mod_strip_cmd = $(STRIP) --strip-debug 868else 869mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 870endif # INSTALL_MOD_STRIP=1 871else 872mod_strip_cmd = true 873endif # INSTALL_MOD_STRIP 874export mod_strip_cmd 875 876# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 877# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 878# or CONFIG_MODULE_COMPRESS_XZ. 879 880mod_compress_cmd = true 881ifdef CONFIG_MODULE_COMPRESS 882 ifdef CONFIG_MODULE_COMPRESS_GZIP 883 mod_compress_cmd = gzip -n -f 884 endif # CONFIG_MODULE_COMPRESS_GZIP 885 ifdef CONFIG_MODULE_COMPRESS_XZ 886 mod_compress_cmd = xz -f 887 endif # CONFIG_MODULE_COMPRESS_XZ 888endif # CONFIG_MODULE_COMPRESS 889export mod_compress_cmd 890 891# Select initial ramdisk compression format, default is gzip(1). 892# This shall be used by the dracut(8) tool while creating an initramfs image. 893# 894INITRD_COMPRESS-y := gzip 895INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 896INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 897INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 898INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 899INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 900# do not export INITRD_COMPRESS, since we didn't actually 901# choose a sane default compression above. 902# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 903 904ifdef CONFIG_MODULE_SIG_ALL 905$(eval $(call config_filename,MODULE_SIG_KEY)) 906 907mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 908else 909mod_sign_cmd = true 910endif 911export mod_sign_cmd 912 913ifdef CONFIG_STACK_VALIDATION 914 has_libelf := $(call try-run,\ 915 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) 916 ifeq ($(has_libelf),1) 917 objtool_target := tools/objtool FORCE 918 else 919 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel") 920 SKIP_STACK_VALIDATION := 1 921 export SKIP_STACK_VALIDATION 922 endif 923endif 924 925 926ifeq ($(KBUILD_EXTMOD),) 927core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 928 929vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 930 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 931 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 932 933vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 934 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) 935 936init-y := $(patsubst %/, %/built-in.o, $(init-y)) 937core-y := $(patsubst %/, %/built-in.o, $(core-y)) 938drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 939net-y := $(patsubst %/, %/built-in.o, $(net-y)) 940libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 941libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 942libs-y := $(libs-y1) $(libs-y2) 943virt-y := $(patsubst %/, %/built-in.o, $(virt-y)) 944 945# Externally visible symbols (used by link-vmlinux.sh) 946export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 947export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y) 948export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 949export LDFLAGS_vmlinux 950# used by scripts/pacmage/Makefile 951export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) 952 953vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) 954 955# Include targets which we want to execute sequentially if the rest of the 956# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be 957# evaluated more than once. 958PHONY += vmlinux_prereq 959vmlinux_prereq: $(vmlinux-deps) FORCE 960ifdef CONFIG_HEADERS_CHECK 961 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 962endif 963ifdef CONFIG_GDB_SCRIPTS 964 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py 965endif 966ifdef CONFIG_TRIM_UNUSED_KSYMS 967 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 968 "$(MAKE) -f $(srctree)/Makefile vmlinux" 969endif 970 971# standalone target for easier testing 972include/generated/autoksyms.h: FORCE 973 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true 974 975ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 976 977# Final link of vmlinux with optional arch pass after final link 978 cmd_link-vmlinux = \ 979 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ 980 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 981 982vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE 983 +$(call if_changed,link-vmlinux) 984 985# Build samples along the rest of the kernel 986ifdef CONFIG_SAMPLES 987vmlinux-dirs += samples 988endif 989 990# The actual objects are generated when descending, 991# make sure no implicit rule kicks in 992$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 993 994# Handle descending into subdirectories listed in $(vmlinux-dirs) 995# Preset locale variables to speed up the build process. Limit locale 996# tweaks to this spot to avoid wrong language settings when running 997# make menuconfig etc. 998# Error messages still appears in the original language 999 1000PHONY += $(vmlinux-dirs) 1001$(vmlinux-dirs): prepare scripts 1002 $(Q)$(MAKE) $(build)=$@ 1003 1004define filechk_kernel.release 1005 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1006endef 1007 1008# Store (new) KERNELRELEASE string in include/config/kernel.release 1009include/config/kernel.release: include/config/auto.conf FORCE 1010 $(call filechk,kernel.release) 1011 1012 1013# Things we need to do before we recursively start building the kernel 1014# or the modules are listed in "prepare". 1015# A multi level approach is used. prepareN is processed before prepareN-1. 1016# archprepare is used in arch Makefiles and when processed asm symlink, 1017# version.h and scripts_basic is processed / created. 1018 1019# Listed in dependency order 1020PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 1021 1022# prepare3 is used to check if we are building in a separate output directory, 1023# and if so do: 1024# 1) Check that make has not been executed in the kernel src $(srctree) 1025prepare3: include/config/kernel.release 1026ifneq ($(KBUILD_SRC),) 1027 @$(kecho) ' Using $(srctree) as source for kernel' 1028 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 1029 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1030 echo >&2 " in the '$(srctree)' directory.";\ 1031 /bin/false; \ 1032 fi; 1033endif 1034 1035# prepare2 creates a makefile if using a separate output directory. 1036# From this point forward, .config has been reprocessed, so any rules 1037# that need to depend on updated CONFIG_* values can be checked here. 1038prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic 1039 1040prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 1041 include/config/auto.conf 1042 $(cmd_crmodverdir) 1043 1044archprepare: archheaders archscripts prepare1 scripts_basic 1045 1046prepare0: archprepare gcc-plugins 1047 $(Q)$(MAKE) $(build)=. 1048 1049# All the preparing.. 1050prepare: prepare0 prepare-objtool 1051 1052PHONY += prepare-objtool 1053prepare-objtool: $(objtool_target) 1054 1055# Check for CONFIG flags that require compiler support. Abort the build 1056# after .config has been processed, but before the kernel build starts. 1057# 1058# For security-sensitive CONFIG options, we don't want to fallback and/or 1059# silently change which compiler flags will be used, since that leads to 1060# producing kernels with different security feature characteristics 1061# depending on the compiler used. (For example, "But I selected 1062# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") 1063PHONY += prepare-compiler-check 1064prepare-compiler-check: FORCE 1065# Make sure compiler supports requested stack protector flag. 1066ifdef stackp-name 1067 ifeq ($(call cc-option, $(stackp-flag)),) 1068 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1069 $(stackp-flag) not supported by compiler >&2 && exit 1 1070 endif 1071endif 1072# Make sure compiler does not have buggy stack-protector support. 1073ifdef stackp-check 1074 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) 1075 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1076 $(stackp-flag) available but compiler is broken >&2 && exit 1 1077 endif 1078endif 1079 @: 1080 1081# Generate some files 1082# --------------------------------------------------------------------------- 1083 1084# KERNELRELEASE can change from a few different places, meaning version.h 1085# needs to be updated, so this check is forced on all builds 1086 1087uts_len := 64 1088define filechk_utsrelease.h 1089 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1090 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1091 exit 1; \ 1092 fi; \ 1093 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1094endef 1095 1096define filechk_version.h 1097 (echo \#define LINUX_VERSION_CODE $(shell \ 1098 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1099 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1100endef 1101 1102$(version_h): $(srctree)/Makefile FORCE 1103 $(call filechk,version.h) 1104 $(Q)rm -f $(old_version_h) 1105 1106include/generated/utsrelease.h: include/config/kernel.release FORCE 1107 $(call filechk,utsrelease.h) 1108 1109PHONY += headerdep 1110headerdep: 1111 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1112 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1113 1114# --------------------------------------------------------------------------- 1115# Firmware install 1116INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1117export INSTALL_FW_PATH 1118 1119PHONY += firmware_install 1120firmware_install: 1121 @mkdir -p $(objtree)/firmware 1122 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1123 1124# --------------------------------------------------------------------------- 1125# Kernel headers 1126 1127#Default location for installed headers 1128export INSTALL_HDR_PATH = $(objtree)/usr 1129 1130# If we do an all arch process set dst to asm-$(hdr-arch) 1131hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1132 1133PHONY += archheaders 1134archheaders: 1135 1136PHONY += archscripts 1137archscripts: 1138 1139PHONY += __headers 1140__headers: $(version_h) scripts_basic asm-generic archheaders archscripts 1141 $(Q)$(MAKE) $(build)=scripts build_unifdef 1142 1143PHONY += headers_install_all 1144headers_install_all: 1145 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1146 1147PHONY += headers_install 1148headers_install: __headers 1149 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 1150 $(error Headers not exportable for the $(SRCARCH) architecture)) 1151 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1152 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) 1153 1154PHONY += headers_check_all 1155headers_check_all: headers_install_all 1156 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1157 1158PHONY += headers_check 1159headers_check: headers_install 1160 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 1161 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 1162 1163# --------------------------------------------------------------------------- 1164# Kernel selftest 1165 1166PHONY += kselftest 1167kselftest: 1168 $(Q)$(MAKE) -C tools/testing/selftests run_tests 1169 1170kselftest-clean: 1171 $(Q)$(MAKE) -C tools/testing/selftests clean 1172 1173PHONY += kselftest-merge 1174kselftest-merge: 1175 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1176 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1177 -m $(objtree)/.config \ 1178 $(srctree)/tools/testing/selftests/*/config 1179 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1180 1181# --------------------------------------------------------------------------- 1182# Modules 1183 1184ifdef CONFIG_MODULES 1185 1186# By default, build modules as well 1187 1188all: modules 1189 1190# Build modules 1191# 1192# A module can be listed more than once in obj-m resulting in 1193# duplicate lines in modules.order files. Those are removed 1194# using awk while concatenating to the final file. 1195 1196PHONY += modules 1197modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1198 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1199 @$(kecho) ' Building modules, stage 2.'; 1200 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1201 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1202 1203modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1204 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1205 1206%/modules.builtin: include/config/auto.conf 1207 $(Q)$(MAKE) $(modbuiltin)=$* 1208 1209 1210# Target to prepare building external modules 1211PHONY += modules_prepare 1212modules_prepare: prepare scripts 1213 1214# Target to install modules 1215PHONY += modules_install 1216modules_install: _modinst_ _modinst_post 1217 1218PHONY += _modinst_ 1219_modinst_: 1220 @rm -rf $(MODLIB)/kernel 1221 @rm -f $(MODLIB)/source 1222 @mkdir -p $(MODLIB)/kernel 1223 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source 1224 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1225 rm -f $(MODLIB)/build ; \ 1226 ln -s $(CURDIR) $(MODLIB)/build ; \ 1227 fi 1228 @cp -f $(objtree)/modules.order $(MODLIB)/ 1229 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1230 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1231 1232# This depmod is only for convenience to give the initial 1233# boot a modules.dep even before / is mounted read-write. However the 1234# boot script depmod is the master version. 1235PHONY += _modinst_post 1236_modinst_post: _modinst_ 1237 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1238 $(call cmd,depmod) 1239 1240ifeq ($(CONFIG_MODULE_SIG), y) 1241PHONY += modules_sign 1242modules_sign: 1243 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1244endif 1245 1246else # CONFIG_MODULES 1247 1248# Modules not configured 1249# --------------------------------------------------------------------------- 1250 1251PHONY += modules modules_install 1252modules modules_install: 1253 @echo >&2 1254 @echo >&2 "The present kernel configuration has modules disabled." 1255 @echo >&2 "Type 'make config' and enable loadable module support." 1256 @echo >&2 "Then build a kernel with module support enabled." 1257 @echo >&2 1258 @exit 1 1259 1260endif # CONFIG_MODULES 1261 1262### 1263# Cleaning is done on three levels. 1264# make clean Delete most generated files 1265# Leave enough to build external modules 1266# make mrproper Delete the current configuration, and all generated files 1267# make distclean Remove editor backup files, patch leftover files and the like 1268 1269# Directories & files removed with 'make clean' 1270CLEAN_DIRS += $(MODVERDIR) 1271 1272# Directories & files removed with 'make mrproper' 1273MRPROPER_DIRS += include/config usr/include include/generated \ 1274 arch/*/include/generated .tmp_objdiff 1275MRPROPER_FILES += .config .config.old .version .old_version \ 1276 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1277 signing_key.pem signing_key.priv signing_key.x509 \ 1278 x509.genkey extra_certificates signing_key.x509.keyid \ 1279 signing_key.x509.signer vmlinux-gdb.py 1280 1281# clean - Delete most, but leave enough to build external modules 1282# 1283clean: rm-dirs := $(CLEAN_DIRS) 1284clean: rm-files := $(CLEAN_FILES) 1285clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1286 1287PHONY += $(clean-dirs) clean archclean vmlinuxclean 1288$(clean-dirs): 1289 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1290 1291vmlinuxclean: 1292 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1293 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1294 1295clean: archclean vmlinuxclean 1296 1297# mrproper - Delete all generated files, including .config 1298# 1299mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1300mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1301mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1302 1303PHONY += $(mrproper-dirs) mrproper archmrproper 1304$(mrproper-dirs): 1305 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1306 1307mrproper: clean archmrproper $(mrproper-dirs) 1308 $(call cmd,rmdirs) 1309 $(call cmd,rmfiles) 1310 1311# distclean 1312# 1313PHONY += distclean 1314 1315distclean: mrproper 1316 @find $(srctree) $(RCS_FIND_IGNORE) \ 1317 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1318 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1319 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ 1320 -type f -print | xargs rm -f 1321 1322 1323# Packaging of the kernel to various formats 1324# --------------------------------------------------------------------------- 1325# rpm target kept for backward compatibility 1326package-dir := scripts/package 1327 1328%src-pkg: FORCE 1329 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1330%pkg: include/config/kernel.release FORCE 1331 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1332rpm: include/config/kernel.release FORCE 1333 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1334 1335 1336# Brief documentation of the typical targets used 1337# --------------------------------------------------------------------------- 1338 1339boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1340boards := $(sort $(notdir $(boards))) 1341board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1342board-dirs := $(sort $(notdir $(board-dirs:/=))) 1343 1344PHONY += help 1345help: 1346 @echo 'Cleaning targets:' 1347 @echo ' clean - Remove most generated files but keep the config and' 1348 @echo ' enough build support to build external modules' 1349 @echo ' mrproper - Remove all generated files + config + various backup files' 1350 @echo ' distclean - mrproper + remove editor backup and patch files' 1351 @echo '' 1352 @echo 'Configuration targets:' 1353 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1354 @echo '' 1355 @echo 'Other generic targets:' 1356 @echo ' all - Build all targets marked with [*]' 1357 @echo '* vmlinux - Build the bare kernel' 1358 @echo '* modules - Build all modules' 1359 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1360 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1361 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1362 @echo ' dir/ - Build all files in dir and below' 1363 @echo ' dir/file.[ois] - Build specified target only' 1364 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1365 @echo ' (requires a recent binutils and recent build (System.map))' 1366 @echo ' dir/file.ko - Build module including final link' 1367 @echo ' modules_prepare - Set up for building external modules' 1368 @echo ' tags/TAGS - Generate tags file for editors' 1369 @echo ' cscope - Generate cscope index' 1370 @echo ' gtags - Generate GNU GLOBAL index' 1371 @echo ' kernelrelease - Output the release version string (use with make -s)' 1372 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1373 @echo ' image_name - Output the image name (use with make -s)' 1374 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1375 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1376 echo '' 1377 @echo 'Static analysers:' 1378 @echo ' checkstack - Generate a list of stack hogs' 1379 @echo ' namespacecheck - Name space analysis on compiled kernel' 1380 @echo ' versioncheck - Sanity check on version.h usage' 1381 @echo ' includecheck - Check for duplicate included header files' 1382 @echo ' export_report - List the usages of all exported symbols' 1383 @echo ' headers_check - Sanity check on exported headers' 1384 @echo ' headerdep - Detect inclusion cycles in headers' 1385 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1386 @echo '' 1387 @echo 'Kernel selftest:' 1388 @echo ' kselftest - Build and run kernel selftest (run as root)' 1389 @echo ' Build, install, and boot kernel before' 1390 @echo ' running kselftest on it' 1391 @echo ' kselftest-clean - Remove all generated kselftest files' 1392 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed' 1393 @echo ' .config.' 1394 @echo '' 1395 @echo 'Userspace tools targets:' 1396 @echo ' use "make tools/help"' 1397 @echo ' or "cd tools; make help"' 1398 @echo '' 1399 @echo 'Kernel packaging:' 1400 @$(MAKE) $(build)=$(package-dir) help 1401 @echo '' 1402 @echo 'Documentation targets:' 1403 @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp 1404 @echo '' 1405 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1406 @echo '' 1407 @echo 'Architecture specific targets ($(SRCARCH)):' 1408 @$(if $(archhelp),$(archhelp),\ 1409 echo ' No architecture specific help defined for $(SRCARCH)') 1410 @echo '' 1411 @$(if $(boards), \ 1412 $(foreach b, $(boards), \ 1413 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1414 echo '') 1415 @$(if $(board-dirs), \ 1416 $(foreach b, $(board-dirs), \ 1417 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1418 printf " %-16s - Show all of the above\\n" help-boards; \ 1419 echo '') 1420 1421 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1422 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1423 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1424 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1425 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1426 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1427 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1428 @echo ' 1: warnings which may be relevant and do not occur too often' 1429 @echo ' 2: warnings which occur quite often but may still be relevant' 1430 @echo ' 3: more obscure warnings, can most likely be ignored' 1431 @echo ' Multiple levels can be combined with W=12 or W=123' 1432 @echo '' 1433 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1434 @echo 'For further info see the ./README file' 1435 1436 1437help-board-dirs := $(addprefix help-,$(board-dirs)) 1438 1439help-boards: $(help-board-dirs) 1440 1441boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1442 1443$(help-board-dirs): help-%: 1444 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1445 @$(if $(boards-per-dir), \ 1446 $(foreach b, $(boards-per-dir), \ 1447 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1448 echo '') 1449 1450 1451# Documentation targets 1452# --------------------------------------------------------------------------- 1453DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs linkcheckdocs 1454PHONY += $(DOC_TARGETS) 1455$(DOC_TARGETS): scripts_basic FORCE 1456 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype 1457 $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@ 1458 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1459 1460else # KBUILD_EXTMOD 1461 1462### 1463# External module support. 1464# When building external modules the kernel used as basis is considered 1465# read-only, and no consistency checks are made and the make 1466# system is not used on the basis kernel. If updates are required 1467# in the basis kernel ordinary make commands (without M=...) must 1468# be used. 1469# 1470# The following are the only valid targets when building external 1471# modules. 1472# make M=dir clean Delete all automatically generated files 1473# make M=dir modules Make all modules in specified dir 1474# make M=dir Same as 'make M=dir modules' 1475# make M=dir modules_install 1476# Install the modules built in the module directory 1477# Assumes install directory is already created 1478 1479# We are always building modules 1480KBUILD_MODULES := 1 1481PHONY += crmodverdir 1482crmodverdir: 1483 $(cmd_crmodverdir) 1484 1485PHONY += $(objtree)/Module.symvers 1486$(objtree)/Module.symvers: 1487 @test -e $(objtree)/Module.symvers || ( \ 1488 echo; \ 1489 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1490 echo " is missing; modules will have no dependencies and modversions."; \ 1491 echo ) 1492 1493module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1494PHONY += $(module-dirs) modules 1495$(module-dirs): crmodverdir $(objtree)/Module.symvers 1496 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1497 1498modules: $(module-dirs) 1499 @$(kecho) ' Building modules, stage 2.'; 1500 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1501 1502PHONY += modules_install 1503modules_install: _emodinst_ _emodinst_post 1504 1505install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1506PHONY += _emodinst_ 1507_emodinst_: 1508 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1509 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1510 1511PHONY += _emodinst_post 1512_emodinst_post: _emodinst_ 1513 $(call cmd,depmod) 1514 1515clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1516 1517PHONY += $(clean-dirs) clean 1518$(clean-dirs): 1519 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1520 1521clean: rm-dirs := $(MODVERDIR) 1522clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1523 1524PHONY += help 1525help: 1526 @echo ' Building external modules.' 1527 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1528 @echo '' 1529 @echo ' modules - default target, build the module(s)' 1530 @echo ' modules_install - install the module' 1531 @echo ' clean - remove generated files in module directory only' 1532 @echo '' 1533 1534# Dummies... 1535PHONY += prepare scripts 1536prepare: ; 1537scripts: ; 1538endif # KBUILD_EXTMOD 1539 1540clean: $(clean-dirs) 1541 $(call cmd,rmdirs) 1542 $(call cmd,rmfiles) 1543 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1544 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1545 -o -name '*.ko.*' \ 1546 -o -name '*.dwo' \ 1547 -o -name '*.su' \ 1548 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1549 -o -name '*.symtypes' -o -name 'modules.order' \ 1550 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1551 -o -name '*.c.[012]*.*' \ 1552 -o -name '*.gcno' \) -type f -print | xargs rm -f 1553 1554# Generate tags for editors 1555# --------------------------------------------------------------------------- 1556quiet_cmd_tags = GEN $@ 1557 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1558 1559tags TAGS cscope gtags: FORCE 1560 $(call cmd,tags) 1561 1562# Scripts to check various things for consistency 1563# --------------------------------------------------------------------------- 1564 1565PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1566 1567includecheck: 1568 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1569 -name '*.[hcS]' -type f -print | sort \ 1570 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1571 1572versioncheck: 1573 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1574 -name '*.[hcS]' -type f -print | sort \ 1575 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1576 1577coccicheck: 1578 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1579 1580namespacecheck: 1581 $(PERL) $(srctree)/scripts/namespace.pl 1582 1583export_report: 1584 $(PERL) $(srctree)/scripts/export_report.pl 1585 1586endif #ifeq ($(config-targets),1) 1587endif #ifeq ($(mixed-targets),1) 1588 1589PHONY += checkstack kernelrelease kernelversion image_name 1590 1591# UML needs a little special treatment here. It wants to use the host 1592# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1593# else wants $(ARCH), including people doing cross-builds, which means 1594# that $(SUBARCH) doesn't work here. 1595ifeq ($(ARCH), um) 1596CHECKSTACK_ARCH := $(SUBARCH) 1597else 1598CHECKSTACK_ARCH := $(ARCH) 1599endif 1600checkstack: 1601 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1602 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1603 1604kernelrelease: 1605 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1606 1607kernelversion: 1608 @echo $(KERNELVERSION) 1609 1610image_name: 1611 @echo $(KBUILD_IMAGE) 1612 1613# Clear a bunch of variables before executing the submake 1614tools/: FORCE 1615 $(Q)mkdir -p $(objtree)/tools 1616 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ 1617 1618tools/%: FORCE 1619 $(Q)mkdir -p $(objtree)/tools 1620 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $* 1621 1622# Single targets 1623# --------------------------------------------------------------------------- 1624# Single targets are compatible with: 1625# - build with mixed source and output 1626# - build with separate output dir 'make O=...' 1627# - external modules 1628# 1629# target-dir => where to store outputfile 1630# build-dir => directory in kernel source tree to use 1631 1632ifeq ($(KBUILD_EXTMOD),) 1633 build-dir = $(patsubst %/,%,$(dir $@)) 1634 target-dir = $(dir $@) 1635else 1636 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1637 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1638 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1639endif 1640 1641%.s: %.c prepare scripts FORCE 1642 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1643%.i: %.c prepare scripts FORCE 1644 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1645%.o: %.c prepare scripts FORCE 1646 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1647%.lst: %.c prepare scripts FORCE 1648 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1649%.s: %.S prepare scripts FORCE 1650 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1651%.o: %.S prepare scripts FORCE 1652 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1653%.symtypes: %.c prepare scripts FORCE 1654 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1655 1656# Modules 1657/: prepare scripts FORCE 1658 $(cmd_crmodverdir) 1659 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1660 $(build)=$(build-dir) 1661# Make sure the latest headers are built for Documentation 1662Documentation/ samples/: headers_install 1663%/: prepare scripts FORCE 1664 $(cmd_crmodverdir) 1665 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1666 $(build)=$(build-dir) 1667%.ko: prepare scripts FORCE 1668 $(cmd_crmodverdir) 1669 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1670 $(build)=$(build-dir) $(@:.ko=.o) 1671 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1672 1673# FIXME Should go into a make.lib or something 1674# =========================================================================== 1675 1676quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1677 cmd_rmdirs = rm -rf $(rm-dirs) 1678 1679quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1680 cmd_rmfiles = rm -f $(rm-files) 1681 1682# Run depmod only if we have System.map and depmod is executable 1683quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1684 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1685 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 1686 1687# Create temporary dir for module support files 1688# clean it up only when building all modules 1689cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1690 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1691 1692# read all saved command lines 1693 1694targets := $(wildcard $(sort $(targets))) 1695cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1696 1697ifneq ($(cmd_files),) 1698 $(cmd_files): ; # Do not try to update included dependency files 1699 include $(cmd_files) 1700endif 1701 1702endif # skip-makefile 1703 1704PHONY += FORCE 1705FORCE: 1706 1707# Declare the contents of the .PHONY variable as phony. We keep that 1708# information in a variable so we can use it in if_changed and friends. 1709.PHONY: $(PHONY) 1710