1VERSION = 4 2PATCHLEVEL = 12 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 ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 88 quiet=silent_ 89 tools_silent=s 90endif 91 92export quiet Q KBUILD_VERBOSE 93 94# kbuild supports saving output files in a separate directory. 95# To locate output files in a separate directory two syntaxes are supported. 96# In both cases the working directory must be the root of the kernel src. 97# 1) O= 98# Use "make O=dir/to/store/output/files/" 99# 100# 2) Set KBUILD_OUTPUT 101# Set the environment variable KBUILD_OUTPUT to point to the directory 102# where the output files shall be placed. 103# export KBUILD_OUTPUT=dir/to/store/output/files/ 104# make 105# 106# The O= assignment takes precedence over the KBUILD_OUTPUT environment 107# variable. 108 109# KBUILD_SRC is not intended to be used by the regular user (for now), 110# it is set on invocation of make with KBUILD_OUTPUT or O= specified. 111ifeq ($(KBUILD_SRC),) 112 113# OK, Make called in directory where kernel src resides 114# Do we want to locate output files in a separate directory? 115ifeq ("$(origin O)", "command line") 116 KBUILD_OUTPUT := $(O) 117endif 118 119# That's our default target when none is given on the command line 120PHONY := _all 121_all: 122 123# Cancel implicit rules on top Makefile 124$(CURDIR)/Makefile Makefile: ; 125 126ifneq ($(words $(subst :, ,$(CURDIR))), 1) 127 $(error main directory cannot contain spaces nor colons) 128endif 129 130ifneq ($(KBUILD_OUTPUT),) 131# check that the output directory actually exists 132saved-output := $(KBUILD_OUTPUT) 133KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ 134 && /bin/pwd) 135$(if $(KBUILD_OUTPUT),, \ 136 $(error failed to create output directory "$(saved-output)")) 137 138PHONY += $(MAKECMDGOALS) sub-make 139 140$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 141 @: 142 143# Invoke a second make in the output directory, passing relevant variables 144sub-make: 145 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ 146 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) 147 148# Leave processing to above invocation of make 149skip-makefile := 1 150endif # ifneq ($(KBUILD_OUTPUT),) 151endif # ifeq ($(KBUILD_SRC),) 152 153# We process the rest of the Makefile if this is the final invocation of make 154ifeq ($(skip-makefile),) 155 156# Do not print "Entering directory ...", 157# but we want to display it when entering to the output directory 158# so that IDEs/editors are able to understand relative filenames. 159MAKEFLAGS += --no-print-directory 160 161# Call a source code checker (by default, "sparse") as part of the 162# C compilation. 163# 164# Use 'make C=1' to enable checking of only re-compiled files. 165# Use 'make C=2' to enable checking of *all* source files, regardless 166# of whether they are re-compiled or not. 167# 168# See the file "Documentation/dev-tools/sparse.rst" for more details, 169# including where to get the "sparse" utility. 170 171ifeq ("$(origin C)", "command line") 172 KBUILD_CHECKSRC = $(C) 173endif 174ifndef KBUILD_CHECKSRC 175 KBUILD_CHECKSRC = 0 176endif 177 178# Use make M=dir to specify directory of external module to build 179# Old syntax make ... SUBDIRS=$PWD is still supported 180# Setting the environment variable KBUILD_EXTMOD take precedence 181ifdef SUBDIRS 182 KBUILD_EXTMOD ?= $(SUBDIRS) 183endif 184 185ifeq ("$(origin M)", "command line") 186 KBUILD_EXTMOD := $(M) 187endif 188 189# If building an external module we do not care about the all: rule 190# but instead _all depend on modules 191PHONY += all 192ifeq ($(KBUILD_EXTMOD),) 193_all: all 194else 195_all: modules 196endif 197 198ifeq ($(KBUILD_SRC),) 199 # building in the source tree 200 srctree := . 201else 202 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 203 # building in a subdirectory of the source tree 204 srctree := .. 205 else 206 srctree := $(KBUILD_SRC) 207 endif 208endif 209objtree := . 210src := $(srctree) 211obj := $(objtree) 212 213VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 214 215export srctree objtree VPATH 216 217# SUBARCH tells the usermode build what the underlying arch is. That is set 218# first, and if a usermode build is happening, the "ARCH=um" on the command 219# line overrides the setting of ARCH below. If a native build is happening, 220# then ARCH is assigned, getting whatever value it gets normally, and 221# SUBARCH is subsequently ignored. 222 223SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ 224 -e s/sun4u/sparc64/ \ 225 -e s/arm.*/arm/ -e s/sa110/arm/ \ 226 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 227 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 228 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) 229 230# Cross compiling and selecting different set of gcc/bin-utils 231# --------------------------------------------------------------------------- 232# 233# When performing cross compilation for other architectures ARCH shall be set 234# to the target architecture. (See arch/* for the possibilities). 235# ARCH can be set during invocation of make: 236# make ARCH=ia64 237# Another way is to have ARCH set in the environment. 238# The default ARCH is the host where make is executed. 239 240# CROSS_COMPILE specify the prefix used for all executables used 241# during compilation. Only gcc and related bin-utils executables 242# are prefixed with $(CROSS_COMPILE). 243# CROSS_COMPILE can be set on the command line 244# make CROSS_COMPILE=ia64-linux- 245# Alternatively CROSS_COMPILE can be set in the environment. 246# A third alternative is to store a setting in .config so that plain 247# "make" in the configured kernel build directory always uses that. 248# Default value for CROSS_COMPILE is not to prefix executables 249# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 250ARCH ?= $(SUBARCH) 251CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 252 253# Architecture as present in compile.h 254UTS_MACHINE := $(ARCH) 255SRCARCH := $(ARCH) 256 257# Additional ARCH settings for x86 258ifeq ($(ARCH),i386) 259 SRCARCH := x86 260endif 261ifeq ($(ARCH),x86_64) 262 SRCARCH := x86 263endif 264 265# Additional ARCH settings for sparc 266ifeq ($(ARCH),sparc32) 267 SRCARCH := sparc 268endif 269ifeq ($(ARCH),sparc64) 270 SRCARCH := sparc 271endif 272 273# Additional ARCH settings for sh 274ifeq ($(ARCH),sh64) 275 SRCARCH := sh 276endif 277 278# Additional ARCH settings for tile 279ifeq ($(ARCH),tilepro) 280 SRCARCH := tile 281endif 282ifeq ($(ARCH),tilegx) 283 SRCARCH := tile 284endif 285 286# Where to locate arch specific headers 287hdr-arch := $(SRCARCH) 288 289KCONFIG_CONFIG ?= .config 290export KCONFIG_CONFIG 291 292# SHELL used by kbuild 293CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 294 else if [ -x /bin/bash ]; then echo /bin/bash; \ 295 else echo sh; fi ; fi) 296 297HOSTCC = gcc 298HOSTCXX = g++ 299HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 300HOSTCXXFLAGS = -O2 301 302ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) 303HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ 304 -Wno-missing-field-initializers -fno-delete-null-pointer-checks 305endif 306 307# Decide whether to build built-in, modular, or both. 308# Normally, just do built-in. 309 310KBUILD_MODULES := 311KBUILD_BUILTIN := 1 312 313# If we have only "make modules", don't compile built-in objects. 314# When we're building modules with modversions, we need to consider 315# the built-in objects during the descend as well, in order to 316# make sure the checksums are up to date before we record them. 317 318ifeq ($(MAKECMDGOALS),modules) 319 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 320endif 321 322# If we have "make <whatever> modules", compile modules 323# in addition to whatever we do anyway. 324# Just "make" or "make all" shall build modules as well 325 326ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 327 KBUILD_MODULES := 1 328endif 329 330ifeq ($(MAKECMDGOALS),) 331 KBUILD_MODULES := 1 332endif 333 334export KBUILD_MODULES KBUILD_BUILTIN 335export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 336 337# We need some generic definitions (do not try to remake the file). 338scripts/Kbuild.include: ; 339include scripts/Kbuild.include 340 341# Make variables (CC, etc...) 342AS = $(CROSS_COMPILE)as 343LD = $(CROSS_COMPILE)ld 344CC = $(CROSS_COMPILE)gcc 345CPP = $(CC) -E 346AR = $(CROSS_COMPILE)ar 347NM = $(CROSS_COMPILE)nm 348STRIP = $(CROSS_COMPILE)strip 349OBJCOPY = $(CROSS_COMPILE)objcopy 350OBJDUMP = $(CROSS_COMPILE)objdump 351AWK = awk 352GENKSYMS = scripts/genksyms/genksyms 353INSTALLKERNEL := installkernel 354DEPMOD = /sbin/depmod 355PERL = perl 356PYTHON = python 357CHECK = sparse 358 359CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 360 -Wbitwise -Wno-return-void $(CF) 361NOSTDINC_FLAGS = 362CFLAGS_MODULE = 363AFLAGS_MODULE = 364LDFLAGS_MODULE = 365CFLAGS_KERNEL = 366AFLAGS_KERNEL = 367LDFLAGS_vmlinux = 368CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,) 369CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) 370 371 372# Use USERINCLUDE when you must reference the UAPI directories only. 373USERINCLUDE := \ 374 -I$(srctree)/arch/$(hdr-arch)/include/uapi \ 375 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ 376 -I$(srctree)/include/uapi \ 377 -I$(objtree)/include/generated/uapi \ 378 -include $(srctree)/include/linux/kconfig.h 379 380# Use LINUXINCLUDE when you must reference the include/ directory. 381# Needed to be compatible with the O= option 382LINUXINCLUDE := \ 383 -I$(srctree)/arch/$(hdr-arch)/include \ 384 -I$(objtree)/arch/$(hdr-arch)/include/generated \ 385 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 386 -I$(objtree)/include \ 387 $(USERINCLUDE) 388 389KBUILD_CPPFLAGS := -D__KERNEL__ 390 391KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 392 -fno-strict-aliasing -fno-common \ 393 -Werror-implicit-function-declaration \ 394 -Wno-format-security \ 395 -std=gnu89 $(call cc-option,-fno-PIE) 396 397 398KBUILD_AFLAGS_KERNEL := 399KBUILD_CFLAGS_KERNEL := 400KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE) 401KBUILD_AFLAGS_MODULE := -DMODULE 402KBUILD_CFLAGS_MODULE := -DMODULE 403KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 404 405# Read KERNELRELEASE from include/config/kernel.release (if it exists) 406KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 407KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 408 409export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 410export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 411export CPP AR NM STRIP OBJCOPY OBJDUMP 412export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE 413export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 414 415export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 416export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN 417export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 418export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 419export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 420export KBUILD_ARFLAGS 421 422# When compiling out-of-tree modules, put MODVERDIR in the module 423# tree rather than in the kernel tree. The kernel tree might 424# even be read-only. 425export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 426 427# Files to ignore in find ... statements 428 429export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 430 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 431 -prune -o 432export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 433 --exclude CVS --exclude .pc --exclude .hg --exclude .git 434 435# =========================================================================== 436# Rules shared between *config targets and build targets 437 438# Basic helpers built in scripts/ 439PHONY += scripts_basic 440scripts_basic: 441 $(Q)$(MAKE) $(build)=scripts/basic 442 $(Q)rm -f .tmp_quiet_recordmcount 443 444# To avoid any implicit rule to kick in, define an empty command. 445scripts/basic/%: scripts_basic ; 446 447PHONY += outputmakefile 448# outputmakefile generates a Makefile in the output directory, if using a 449# separate output directory. This allows convenient use of make in the 450# output directory. 451outputmakefile: 452ifneq ($(KBUILD_SRC),) 453 $(Q)ln -fsn $(srctree) source 454 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 455 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 456endif 457 458# Support for using generic headers in asm-generic 459PHONY += asm-generic 460asm-generic: 461 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 462 src=asm obj=arch/$(SRCARCH)/include/generated/asm 463 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 464 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 465 466# To make sure we do not include .config for any of the *config targets 467# catch them early, and hand them over to scripts/kconfig/Makefile 468# It is allowed to specify more targets when calling make, including 469# mixing *config targets and build targets. 470# For example 'make oldconfig all'. 471# Detect when mixed targets is specified, and make a second invocation 472# of make so .config is not included in this case either (for *config). 473 474version_h := include/generated/uapi/linux/version.h 475old_version_h := include/linux/version.h 476 477no-dot-config-targets := clean mrproper distclean \ 478 cscope gtags TAGS tags help% %docs check% coccicheck \ 479 $(version_h) headers_% archheaders archscripts \ 480 kernelversion %src-pkg 481 482config-targets := 0 483mixed-targets := 0 484dot-config := 1 485 486ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 487 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 488 dot-config := 0 489 endif 490endif 491 492ifeq ($(KBUILD_EXTMOD),) 493 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 494 config-targets := 1 495 ifneq ($(words $(MAKECMDGOALS)),1) 496 mixed-targets := 1 497 endif 498 endif 499endif 500# install and module_install need also be processed one by one 501ifneq ($(filter install,$(MAKECMDGOALS)),) 502 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 503 mixed-targets := 1 504 endif 505endif 506 507ifeq ($(mixed-targets),1) 508# =========================================================================== 509# We're called with mixed targets (*config and build targets). 510# Handle them one by one. 511 512PHONY += $(MAKECMDGOALS) __build_one_by_one 513 514$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 515 @: 516 517__build_one_by_one: 518 $(Q)set -e; \ 519 for i in $(MAKECMDGOALS); do \ 520 $(MAKE) -f $(srctree)/Makefile $$i; \ 521 done 522 523else 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 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 546ifeq ($(KBUILD_EXTMOD),) 547# Additional helpers built in scripts/ 548# Carefully list dependencies so we do not try to build scripts twice 549# in parallel 550PHONY += scripts 551scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ 552 asm-generic gcc-plugins 553 $(Q)$(MAKE) $(build)=$(@) 554 555# Objects we will link into vmlinux / subdirs we need to visit 556init-y := init/ 557drivers-y := drivers/ sound/ firmware/ 558net-y := net/ 559libs-y := lib/ 560core-y := usr/ 561virt-y := virt/ 562endif # KBUILD_EXTMOD 563 564ifeq ($(dot-config),1) 565# Read in config 566-include include/config/auto.conf 567 568ifeq ($(KBUILD_EXTMOD),) 569# Read in dependencies to all Kconfig* files, make sure to run 570# oldconfig if changes are detected. 571-include include/config/auto.conf.cmd 572 573# To avoid any implicit rule to kick in, define an empty command 574$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 575 576# If .config is newer than include/config/auto.conf, someone tinkered 577# with it and forgot to run make oldconfig. 578# if auto.conf.cmd is missing then we are probably in a cleaned tree so 579# we execute the config step to be sure to catch updated Kconfig files 580include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 581 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 582else 583# external modules needs include/generated/autoconf.h and include/config/auto.conf 584# but do not care if they are up-to-date. Use auto.conf to trigger the test 585PHONY += include/config/auto.conf 586 587include/config/auto.conf: 588 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 589 echo >&2; \ 590 echo >&2 " ERROR: Kernel configuration is invalid."; \ 591 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 592 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 593 echo >&2 ; \ 594 /bin/false) 595 596endif # KBUILD_EXTMOD 597 598else 599# Dummy target needed, because used as prerequisite 600include/config/auto.conf: ; 601endif # $(dot-config) 602 603# For the kernel to actually contain only the needed exported symbols, 604# we have to build modules as well to determine what those symbols are. 605# (this can be evaluated only once include/config/auto.conf has been included) 606ifdef CONFIG_TRIM_UNUSED_KSYMS 607 KBUILD_MODULES := 1 608endif 609 610# The all: target is the default when no target is given on the 611# command line. 612# This allow a user to issue only 'make' to build a kernel including modules 613# Defaults to vmlinux, but the arch makefile usually adds further targets 614all: vmlinux 615 616# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 617# values of the respective KBUILD_* variables 618ARCH_CPPFLAGS := 619ARCH_AFLAGS := 620ARCH_CFLAGS := 621include arch/$(SRCARCH)/Makefile 622 623KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 624KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 625 626ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 627KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) 628KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) 629else 630ifdef CONFIG_PROFILE_ALL_BRANCHES 631KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) 632else 633KBUILD_CFLAGS += -O2 634endif 635endif 636 637KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ 638 $(call cc-disable-warning,maybe-uninitialized,)) 639 640# Tell gcc to never replace conditional load with a non-conditional one 641KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 642 643# check for 'asm goto' 644ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) 645 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 646 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO 647endif 648 649include scripts/Makefile.gcc-plugins 650 651ifdef CONFIG_READABLE_ASM 652# Disable optimizations that make assembler listings hard to read. 653# reorder blocks reorders the control in the function 654# ipa clone creates specialized cloned functions 655# partial inlining inlines only parts of functions 656KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 657 $(call cc-option,-fno-ipa-cp-clone,) \ 658 $(call cc-option,-fno-partial-inlining) 659endif 660 661ifneq ($(CONFIG_FRAME_WARN),0) 662KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 663endif 664 665# This selects the stack protector compiler flag. Testing it is delayed 666# until after .config has been reprocessed, in the prepare-compiler-check 667# target. 668ifdef CONFIG_CC_STACKPROTECTOR_REGULAR 669 stackp-flag := -fstack-protector 670 stackp-name := REGULAR 671else 672ifdef CONFIG_CC_STACKPROTECTOR_STRONG 673 stackp-flag := -fstack-protector-strong 674 stackp-name := STRONG 675else 676 # Force off for distro compilers that enable stack protector by default. 677 stackp-flag := $(call cc-option, -fno-stack-protector) 678endif 679endif 680# Find arch-specific stack protector compiler sanity-checking script. 681ifdef CONFIG_CC_STACKPROTECTOR 682 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh 683 stackp-check := $(wildcard $(stackp-path)) 684endif 685KBUILD_CFLAGS += $(stackp-flag) 686 687ifeq ($(cc-name),clang) 688ifneq ($(CROSS_COMPILE),) 689CLANG_TARGET := -target $(notdir $(CROSS_COMPILE:%-=%)) 690GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..) 691endif 692ifneq ($(GCC_TOOLCHAIN),) 693CLANG_GCC_TC := -gcc-toolchain $(GCC_TOOLCHAIN) 694endif 695KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) 696KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) 697KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 698KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) 699KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 700KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 701KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 702# Quiet clang warning: comparison of unsigned expression < 0 is always false 703KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 704# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 705# source of a reference will be _MergedGlobals and not on of the whitelisted names. 706# See modpost pattern 2 707KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 708KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 709KBUILD_CFLAGS += $(call cc-option, -no-integrated-as) 710KBUILD_AFLAGS += $(call cc-option, -no-integrated-as) 711else 712 713# These warnings generated too much noise in a regular build. 714# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 715KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 716KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 717endif 718 719ifdef CONFIG_FRAME_POINTER 720KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 721else 722# Some targets (ARM with Thumb2, for example), can't be built with frame 723# pointers. For those, we don't have FUNCTION_TRACER automatically 724# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 725# incompatible with -fomit-frame-pointer with current GCC, so we don't use 726# -fomit-frame-pointer with FUNCTION_TRACER. 727ifndef CONFIG_FUNCTION_TRACER 728KBUILD_CFLAGS += -fomit-frame-pointer 729endif 730endif 731 732KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 733 734ifdef CONFIG_DEBUG_INFO 735ifdef CONFIG_DEBUG_INFO_SPLIT 736KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 737else 738KBUILD_CFLAGS += -g 739endif 740KBUILD_AFLAGS += -Wa,-gdwarf-2 741endif 742ifdef CONFIG_DEBUG_INFO_DWARF4 743KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 744endif 745 746ifdef CONFIG_DEBUG_INFO_REDUCED 747KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 748 $(call cc-option,-fno-var-tracking) 749endif 750 751ifdef CONFIG_FUNCTION_TRACER 752ifndef CC_FLAGS_FTRACE 753CC_FLAGS_FTRACE := -pg 754endif 755export CC_FLAGS_FTRACE 756ifdef CONFIG_HAVE_FENTRY 757CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 758endif 759KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) 760KBUILD_AFLAGS += $(CC_USING_FENTRY) 761ifdef CONFIG_DYNAMIC_FTRACE 762 ifdef CONFIG_HAVE_C_RECORDMCOUNT 763 BUILD_C_RECORDMCOUNT := y 764 export BUILD_C_RECORDMCOUNT 765 endif 766endif 767endif 768 769# We trigger additional mismatches with less inlining 770ifdef CONFIG_DEBUG_SECTION_MISMATCH 771KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 772endif 773 774ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 775KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) 776KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) 777endif 778 779# arch Makefile may override CC so keep this after arch Makefile is included 780NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 781CHECKFLAGS += $(NOSTDINC_FLAGS) 782 783# warn about C99 declaration after statement 784KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 785 786# disable pointer signed / unsigned warnings in gcc 4.0 787KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 788 789# disable invalid "can't wrap" optimizations for signed / pointers 790KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 791 792# conserve stack if available 793KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 794 795# disallow errors like 'EXPORT_GPL(foo);' with missing header 796KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 797 798# require functions to have arguments in prototypes, not empty 'int foo()' 799KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 800 801# Prohibit date/time macros, which would make the build non-deterministic 802KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 803 804# enforce correct pointer usage 805KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 806 807# Require designated initializers for all marked structures 808KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 809 810# use the deterministic mode of AR if available 811KBUILD_ARFLAGS := $(call ar-option,D) 812 813include scripts/Makefile.kasan 814include scripts/Makefile.extrawarn 815include scripts/Makefile.ubsan 816 817# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 818# last assignments 819KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 820KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 821KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 822 823# Use --build-id when available. 824LDFLAGS_BUILD_ID := $(patsubst -Wl$(comma)%,%,\ 825 $(call cc-ldoption, -Wl$(comma)--build-id,)) 826KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 827LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 828 829ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 830LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) 831endif 832 833ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 834LDFLAGS_vmlinux += $(call ld-option, -X,) 835endif 836 837# Default kernel image to build when no specific target is given. 838# KBUILD_IMAGE may be overruled on the command line or 839# set in the environment 840# Also any assignments in arch/$(ARCH)/Makefile take precedence over 841# this default value 842export KBUILD_IMAGE ?= vmlinux 843 844# 845# INSTALL_PATH specifies where to place the updated kernel and system map 846# images. Default is /boot, but you can set it to other values 847export INSTALL_PATH ?= /boot 848 849# 850# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 851# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 852# an argument if needed. Otherwise it defaults to the kernel install path 853# 854export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 855 856# 857# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 858# relocations required by build roots. This is not defined in the 859# makefile but the argument can be passed to make if needed. 860# 861 862MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 863export MODLIB 864 865# 866# INSTALL_MOD_STRIP, if defined, will cause modules to be 867# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 868# the default option --strip-debug will be used. Otherwise, 869# INSTALL_MOD_STRIP value will be used as the options to the strip command. 870 871ifdef INSTALL_MOD_STRIP 872ifeq ($(INSTALL_MOD_STRIP),1) 873mod_strip_cmd = $(STRIP) --strip-debug 874else 875mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 876endif # INSTALL_MOD_STRIP=1 877else 878mod_strip_cmd = true 879endif # INSTALL_MOD_STRIP 880export mod_strip_cmd 881 882# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 883# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 884# or CONFIG_MODULE_COMPRESS_XZ. 885 886mod_compress_cmd = true 887ifdef CONFIG_MODULE_COMPRESS 888 ifdef CONFIG_MODULE_COMPRESS_GZIP 889 mod_compress_cmd = gzip -n -f 890 endif # CONFIG_MODULE_COMPRESS_GZIP 891 ifdef CONFIG_MODULE_COMPRESS_XZ 892 mod_compress_cmd = xz -f 893 endif # CONFIG_MODULE_COMPRESS_XZ 894endif # CONFIG_MODULE_COMPRESS 895export mod_compress_cmd 896 897# Select initial ramdisk compression format, default is gzip(1). 898# This shall be used by the dracut(8) tool while creating an initramfs image. 899# 900INITRD_COMPRESS-y := gzip 901INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 902INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 903INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 904INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 905INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 906# do not export INITRD_COMPRESS, since we didn't actually 907# choose a sane default compression above. 908# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 909 910ifdef CONFIG_MODULE_SIG_ALL 911$(eval $(call config_filename,MODULE_SIG_KEY)) 912 913mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 914else 915mod_sign_cmd = true 916endif 917export mod_sign_cmd 918 919ifdef CONFIG_STACK_VALIDATION 920 has_libelf := $(call try-run,\ 921 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) 922 ifeq ($(has_libelf),1) 923 objtool_target := tools/objtool FORCE 924 else 925 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel") 926 SKIP_STACK_VALIDATION := 1 927 export SKIP_STACK_VALIDATION 928 endif 929endif 930 931 932ifeq ($(KBUILD_EXTMOD),) 933core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 934 935vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 936 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 937 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 938 939vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 940 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) 941 942init-y := $(patsubst %/, %/built-in.o, $(init-y)) 943core-y := $(patsubst %/, %/built-in.o, $(core-y)) 944drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 945net-y := $(patsubst %/, %/built-in.o, $(net-y)) 946libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 947libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y))) 948virt-y := $(patsubst %/, %/built-in.o, $(virt-y)) 949 950# Externally visible symbols (used by link-vmlinux.sh) 951export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 952export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y) 953export KBUILD_VMLINUX_LIBS := $(libs-y1) 954export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 955export LDFLAGS_vmlinux 956# used by scripts/pacmage/Makefile 957export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) 958 959vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS) 960 961# Include targets which we want to execute sequentially if the rest of the 962# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be 963# evaluated more than once. 964PHONY += vmlinux_prereq 965vmlinux_prereq: $(vmlinux-deps) FORCE 966ifdef CONFIG_HEADERS_CHECK 967 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 968endif 969ifdef CONFIG_GDB_SCRIPTS 970 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py 971endif 972ifdef CONFIG_TRIM_UNUSED_KSYMS 973 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 974 "$(MAKE) -f $(srctree)/Makefile vmlinux" 975endif 976 977# standalone target for easier testing 978include/generated/autoksyms.h: FORCE 979 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true 980 981ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 982 983# Final link of vmlinux with optional arch pass after final link 984 cmd_link-vmlinux = \ 985 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ 986 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 987 988vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE 989 +$(call if_changed,link-vmlinux) 990 991# Build samples along the rest of the kernel 992ifdef CONFIG_SAMPLES 993vmlinux-dirs += samples 994endif 995 996# The actual objects are generated when descending, 997# make sure no implicit rule kicks in 998$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 999 1000# Handle descending into subdirectories listed in $(vmlinux-dirs) 1001# Preset locale variables to speed up the build process. Limit locale 1002# tweaks to this spot to avoid wrong language settings when running 1003# make menuconfig etc. 1004# Error messages still appears in the original language 1005 1006PHONY += $(vmlinux-dirs) 1007$(vmlinux-dirs): prepare scripts 1008 $(Q)$(MAKE) $(build)=$@ 1009 1010define filechk_kernel.release 1011 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1012endef 1013 1014# Store (new) KERNELRELEASE string in include/config/kernel.release 1015include/config/kernel.release: include/config/auto.conf FORCE 1016 $(call filechk,kernel.release) 1017 1018 1019# Things we need to do before we recursively start building the kernel 1020# or the modules are listed in "prepare". 1021# A multi level approach is used. prepareN is processed before prepareN-1. 1022# archprepare is used in arch Makefiles and when processed asm symlink, 1023# version.h and scripts_basic is processed / created. 1024 1025# Listed in dependency order 1026PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 1027 1028# prepare3 is used to check if we are building in a separate output directory, 1029# and if so do: 1030# 1) Check that make has not been executed in the kernel src $(srctree) 1031prepare3: include/config/kernel.release 1032ifneq ($(KBUILD_SRC),) 1033 @$(kecho) ' Using $(srctree) as source for kernel' 1034 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 1035 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1036 echo >&2 " in the '$(srctree)' directory.";\ 1037 /bin/false; \ 1038 fi; 1039endif 1040 1041# prepare2 creates a makefile if using a separate output directory. 1042# From this point forward, .config has been reprocessed, so any rules 1043# that need to depend on updated CONFIG_* values can be checked here. 1044prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic 1045 1046prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 1047 include/config/auto.conf 1048 $(cmd_crmodverdir) 1049 1050archprepare: archheaders archscripts prepare1 scripts_basic 1051 1052prepare0: archprepare gcc-plugins 1053 $(Q)$(MAKE) $(build)=. 1054 1055# All the preparing.. 1056prepare: prepare0 prepare-objtool 1057 1058PHONY += prepare-objtool 1059prepare-objtool: $(objtool_target) 1060 1061# Check for CONFIG flags that require compiler support. Abort the build 1062# after .config has been processed, but before the kernel build starts. 1063# 1064# For security-sensitive CONFIG options, we don't want to fallback and/or 1065# silently change which compiler flags will be used, since that leads to 1066# producing kernels with different security feature characteristics 1067# depending on the compiler used. (For example, "But I selected 1068# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") 1069PHONY += prepare-compiler-check 1070prepare-compiler-check: FORCE 1071# Make sure compiler supports requested stack protector flag. 1072ifdef stackp-name 1073 ifeq ($(call cc-option, $(stackp-flag)),) 1074 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1075 $(stackp-flag) not supported by compiler >&2 && exit 1 1076 endif 1077endif 1078# Make sure compiler does not have buggy stack-protector support. 1079ifdef stackp-check 1080 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) 1081 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1082 $(stackp-flag) available but compiler is broken >&2 && exit 1 1083 endif 1084endif 1085 @: 1086 1087# Generate some files 1088# --------------------------------------------------------------------------- 1089 1090# KERNELRELEASE can change from a few different places, meaning version.h 1091# needs to be updated, so this check is forced on all builds 1092 1093uts_len := 64 1094define filechk_utsrelease.h 1095 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1096 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1097 exit 1; \ 1098 fi; \ 1099 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1100endef 1101 1102define filechk_version.h 1103 (echo \#define LINUX_VERSION_CODE $(shell \ 1104 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1105 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1106endef 1107 1108$(version_h): $(srctree)/Makefile FORCE 1109 $(call filechk,version.h) 1110 $(Q)rm -f $(old_version_h) 1111 1112include/generated/utsrelease.h: include/config/kernel.release FORCE 1113 $(call filechk,utsrelease.h) 1114 1115PHONY += headerdep 1116headerdep: 1117 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1118 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1119 1120# --------------------------------------------------------------------------- 1121# Firmware install 1122INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1123export INSTALL_FW_PATH 1124 1125PHONY += firmware_install 1126firmware_install: 1127 @mkdir -p $(objtree)/firmware 1128 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1129 1130# --------------------------------------------------------------------------- 1131# Kernel headers 1132 1133#Default location for installed headers 1134export INSTALL_HDR_PATH = $(objtree)/usr 1135 1136# If we do an all arch process set dst to include/arch-$(hdr-arch) 1137hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(hdr-arch), dst=include) 1138 1139PHONY += archheaders 1140archheaders: 1141 1142PHONY += archscripts 1143archscripts: 1144 1145PHONY += __headers 1146__headers: $(version_h) scripts_basic asm-generic archheaders archscripts 1147 $(Q)$(MAKE) $(build)=scripts build_unifdef 1148 1149PHONY += headers_install_all 1150headers_install_all: 1151 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1152 1153PHONY += headers_install 1154headers_install: __headers 1155 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 1156 $(error Headers not exportable for the $(SRCARCH) architecture)) 1157 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include 1158 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst) 1159 1160PHONY += headers_check_all 1161headers_check_all: headers_install_all 1162 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1163 1164PHONY += headers_check 1165headers_check: headers_install 1166 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 1167 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst) HDRCHECK=1 1168 1169# --------------------------------------------------------------------------- 1170# Kernel selftest 1171 1172PHONY += kselftest 1173kselftest: 1174 $(Q)$(MAKE) -C tools/testing/selftests run_tests 1175 1176kselftest-clean: 1177 $(Q)$(MAKE) -C tools/testing/selftests clean 1178 1179PHONY += kselftest-merge 1180kselftest-merge: 1181 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1182 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1183 -m $(objtree)/.config \ 1184 $(srctree)/tools/testing/selftests/*/config 1185 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1186 1187# --------------------------------------------------------------------------- 1188# Modules 1189 1190ifdef CONFIG_MODULES 1191 1192# By default, build modules as well 1193 1194all: modules 1195 1196# Build modules 1197# 1198# A module can be listed more than once in obj-m resulting in 1199# duplicate lines in modules.order files. Those are removed 1200# using awk while concatenating to the final file. 1201 1202PHONY += modules 1203modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1204 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1205 @$(kecho) ' Building modules, stage 2.'; 1206 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1207 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1208 1209modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1210 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1211 1212%/modules.builtin: include/config/auto.conf 1213 $(Q)$(MAKE) $(modbuiltin)=$* 1214 1215 1216# Target to prepare building external modules 1217PHONY += modules_prepare 1218modules_prepare: prepare scripts 1219 1220# Target to install modules 1221PHONY += modules_install 1222modules_install: _modinst_ _modinst_post 1223 1224PHONY += _modinst_ 1225_modinst_: 1226 @rm -rf $(MODLIB)/kernel 1227 @rm -f $(MODLIB)/source 1228 @mkdir -p $(MODLIB)/kernel 1229 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source 1230 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1231 rm -f $(MODLIB)/build ; \ 1232 ln -s $(CURDIR) $(MODLIB)/build ; \ 1233 fi 1234 @cp -f $(objtree)/modules.order $(MODLIB)/ 1235 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1236 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1237 1238# This depmod is only for convenience to give the initial 1239# boot a modules.dep even before / is mounted read-write. However the 1240# boot script depmod is the master version. 1241PHONY += _modinst_post 1242_modinst_post: _modinst_ 1243 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1244 $(call cmd,depmod) 1245 1246ifeq ($(CONFIG_MODULE_SIG), y) 1247PHONY += modules_sign 1248modules_sign: 1249 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1250endif 1251 1252else # CONFIG_MODULES 1253 1254# Modules not configured 1255# --------------------------------------------------------------------------- 1256 1257PHONY += modules modules_install 1258modules modules_install: 1259 @echo >&2 1260 @echo >&2 "The present kernel configuration has modules disabled." 1261 @echo >&2 "Type 'make config' and enable loadable module support." 1262 @echo >&2 "Then build a kernel with module support enabled." 1263 @echo >&2 1264 @exit 1 1265 1266endif # CONFIG_MODULES 1267 1268### 1269# Cleaning is done on three levels. 1270# make clean Delete most generated files 1271# Leave enough to build external modules 1272# make mrproper Delete the current configuration, and all generated files 1273# make distclean Remove editor backup files, patch leftover files and the like 1274 1275# Directories & files removed with 'make clean' 1276CLEAN_DIRS += $(MODVERDIR) 1277 1278# Directories & files removed with 'make mrproper' 1279MRPROPER_DIRS += include/config usr/include include/generated \ 1280 arch/*/include/generated .tmp_objdiff 1281MRPROPER_FILES += .config .config.old .version .old_version \ 1282 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1283 signing_key.pem signing_key.priv signing_key.x509 \ 1284 x509.genkey extra_certificates signing_key.x509.keyid \ 1285 signing_key.x509.signer vmlinux-gdb.py 1286 1287# clean - Delete most, but leave enough to build external modules 1288# 1289clean: rm-dirs := $(CLEAN_DIRS) 1290clean: rm-files := $(CLEAN_FILES) 1291clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1292 1293PHONY += $(clean-dirs) clean archclean vmlinuxclean 1294$(clean-dirs): 1295 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1296 1297vmlinuxclean: 1298 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1299 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1300 1301clean: archclean vmlinuxclean 1302 1303# mrproper - Delete all generated files, including .config 1304# 1305mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1306mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1307mrproper-dirs := $(addprefix _mrproper_,scripts) 1308 1309PHONY += $(mrproper-dirs) mrproper archmrproper 1310$(mrproper-dirs): 1311 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1312 1313mrproper: clean archmrproper $(mrproper-dirs) 1314 $(call cmd,rmdirs) 1315 $(call cmd,rmfiles) 1316 1317# distclean 1318# 1319PHONY += distclean 1320 1321distclean: mrproper 1322 @find $(srctree) $(RCS_FIND_IGNORE) \ 1323 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1324 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1325 -o -name 'core' \) \ 1326 -type f -print | xargs rm -f 1327 1328 1329# Packaging of the kernel to various formats 1330# --------------------------------------------------------------------------- 1331# rpm target kept for backward compatibility 1332package-dir := scripts/package 1333 1334%src-pkg: FORCE 1335 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1336%pkg: include/config/kernel.release FORCE 1337 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1338rpm: include/config/kernel.release FORCE 1339 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1340 1341 1342# Brief documentation of the typical targets used 1343# --------------------------------------------------------------------------- 1344 1345boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1346boards := $(sort $(notdir $(boards))) 1347board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1348board-dirs := $(sort $(notdir $(board-dirs:/=))) 1349 1350PHONY += help 1351help: 1352 @echo 'Cleaning targets:' 1353 @echo ' clean - Remove most generated files but keep the config and' 1354 @echo ' enough build support to build external modules' 1355 @echo ' mrproper - Remove all generated files + config + various backup files' 1356 @echo ' distclean - mrproper + remove editor backup and patch files' 1357 @echo '' 1358 @echo 'Configuration targets:' 1359 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1360 @echo '' 1361 @echo 'Other generic targets:' 1362 @echo ' all - Build all targets marked with [*]' 1363 @echo '* vmlinux - Build the bare kernel' 1364 @echo '* modules - Build all modules' 1365 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1366 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1367 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1368 @echo ' dir/ - Build all files in dir and below' 1369 @echo ' dir/file.[ois] - Build specified target only' 1370 @echo ' dir/file.ll - Build the LLVM assembly file' 1371 @echo ' (requires compiler support for LLVM assembly generation)' 1372 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1373 @echo ' (requires a recent binutils and recent build (System.map))' 1374 @echo ' dir/file.ko - Build module including final link' 1375 @echo ' modules_prepare - Set up for building external modules' 1376 @echo ' tags/TAGS - Generate tags file for editors' 1377 @echo ' cscope - Generate cscope index' 1378 @echo ' gtags - Generate GNU GLOBAL index' 1379 @echo ' kernelrelease - Output the release version string (use with make -s)' 1380 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1381 @echo ' image_name - Output the image name (use with make -s)' 1382 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1383 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1384 echo '' 1385 @echo 'Static analysers:' 1386 @echo ' checkstack - Generate a list of stack hogs' 1387 @echo ' namespacecheck - Name space analysis on compiled kernel' 1388 @echo ' versioncheck - Sanity check on version.h usage' 1389 @echo ' includecheck - Check for duplicate included header files' 1390 @echo ' export_report - List the usages of all exported symbols' 1391 @echo ' headers_check - Sanity check on exported headers' 1392 @echo ' headerdep - Detect inclusion cycles in headers' 1393 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1394 @echo '' 1395 @echo 'Kernel selftest:' 1396 @echo ' kselftest - Build and run kernel selftest (run as root)' 1397 @echo ' Build, install, and boot kernel before' 1398 @echo ' running kselftest on it' 1399 @echo ' kselftest-clean - Remove all generated kselftest files' 1400 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed' 1401 @echo ' .config.' 1402 @echo '' 1403 @echo 'Userspace tools targets:' 1404 @echo ' use "make tools/help"' 1405 @echo ' or "cd tools; make help"' 1406 @echo '' 1407 @echo 'Kernel packaging:' 1408 @$(MAKE) $(build)=$(package-dir) help 1409 @echo '' 1410 @echo 'Documentation targets:' 1411 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1412 @echo '' 1413 @echo 'Architecture specific targets ($(SRCARCH)):' 1414 @$(if $(archhelp),$(archhelp),\ 1415 echo ' No architecture specific help defined for $(SRCARCH)') 1416 @echo '' 1417 @$(if $(boards), \ 1418 $(foreach b, $(boards), \ 1419 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1420 echo '') 1421 @$(if $(board-dirs), \ 1422 $(foreach b, $(board-dirs), \ 1423 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1424 printf " %-16s - Show all of the above\\n" help-boards; \ 1425 echo '') 1426 1427 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1428 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1429 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1430 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' 1431 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1432 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1433 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1434 @echo ' 1: warnings which may be relevant and do not occur too often' 1435 @echo ' 2: warnings which occur quite often but may still be relevant' 1436 @echo ' 3: more obscure warnings, can most likely be ignored' 1437 @echo ' Multiple levels can be combined with W=12 or W=123' 1438 @echo '' 1439 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1440 @echo 'For further info see the ./README file' 1441 1442 1443help-board-dirs := $(addprefix help-,$(board-dirs)) 1444 1445help-boards: $(help-board-dirs) 1446 1447boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1448 1449$(help-board-dirs): help-%: 1450 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1451 @$(if $(boards-per-dir), \ 1452 $(foreach b, $(boards-per-dir), \ 1453 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1454 echo '') 1455 1456 1457# Documentation targets 1458# --------------------------------------------------------------------------- 1459DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs linkcheckdocs 1460PHONY += $(DOC_TARGETS) 1461$(DOC_TARGETS): scripts_basic FORCE 1462 $(Q)$(MAKE) $(build)=Documentation $@ 1463 1464else # KBUILD_EXTMOD 1465 1466### 1467# External module support. 1468# When building external modules the kernel used as basis is considered 1469# read-only, and no consistency checks are made and the make 1470# system is not used on the basis kernel. If updates are required 1471# in the basis kernel ordinary make commands (without M=...) must 1472# be used. 1473# 1474# The following are the only valid targets when building external 1475# modules. 1476# make M=dir clean Delete all automatically generated files 1477# make M=dir modules Make all modules in specified dir 1478# make M=dir Same as 'make M=dir modules' 1479# make M=dir modules_install 1480# Install the modules built in the module directory 1481# Assumes install directory is already created 1482 1483# We are always building modules 1484KBUILD_MODULES := 1 1485PHONY += crmodverdir 1486crmodverdir: 1487 $(cmd_crmodverdir) 1488 1489PHONY += $(objtree)/Module.symvers 1490$(objtree)/Module.symvers: 1491 @test -e $(objtree)/Module.symvers || ( \ 1492 echo; \ 1493 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1494 echo " is missing; modules will have no dependencies and modversions."; \ 1495 echo ) 1496 1497module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1498PHONY += $(module-dirs) modules 1499$(module-dirs): crmodverdir $(objtree)/Module.symvers 1500 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1501 1502modules: $(module-dirs) 1503 @$(kecho) ' Building modules, stage 2.'; 1504 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1505 1506PHONY += modules_install 1507modules_install: _emodinst_ _emodinst_post 1508 1509install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1510PHONY += _emodinst_ 1511_emodinst_: 1512 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1513 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1514 1515PHONY += _emodinst_post 1516_emodinst_post: _emodinst_ 1517 $(call cmd,depmod) 1518 1519clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1520 1521PHONY += $(clean-dirs) clean 1522$(clean-dirs): 1523 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1524 1525clean: rm-dirs := $(MODVERDIR) 1526clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1527 1528PHONY += help 1529help: 1530 @echo ' Building external modules.' 1531 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1532 @echo '' 1533 @echo ' modules - default target, build the module(s)' 1534 @echo ' modules_install - install the module' 1535 @echo ' clean - remove generated files in module directory only' 1536 @echo '' 1537 1538# Dummies... 1539PHONY += prepare scripts 1540prepare: ; 1541scripts: ; 1542endif # KBUILD_EXTMOD 1543 1544clean: $(clean-dirs) 1545 $(call cmd,rmdirs) 1546 $(call cmd,rmfiles) 1547 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1548 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1549 -o -name '*.ko.*' \ 1550 -o -name '*.dwo' \ 1551 -o -name '*.su' \ 1552 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1553 -o -name '*.symtypes' -o -name 'modules.order' \ 1554 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1555 -o -name '*.c.[012]*.*' \ 1556 -o -name '*.ll' \ 1557 -o -name '*.gcno' \) -type f -print | xargs rm -f 1558 1559# Generate tags for editors 1560# --------------------------------------------------------------------------- 1561quiet_cmd_tags = GEN $@ 1562 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1563 1564tags TAGS cscope gtags: FORCE 1565 $(call cmd,tags) 1566 1567# Scripts to check various things for consistency 1568# --------------------------------------------------------------------------- 1569 1570PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1571 1572includecheck: 1573 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1574 -name '*.[hcS]' -type f -print | sort \ 1575 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1576 1577versioncheck: 1578 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1579 -name '*.[hcS]' -type f -print | sort \ 1580 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1581 1582coccicheck: 1583 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1584 1585namespacecheck: 1586 $(PERL) $(srctree)/scripts/namespace.pl 1587 1588export_report: 1589 $(PERL) $(srctree)/scripts/export_report.pl 1590 1591endif #ifeq ($(config-targets),1) 1592endif #ifeq ($(mixed-targets),1) 1593 1594PHONY += checkstack kernelrelease kernelversion image_name 1595 1596# UML needs a little special treatment here. It wants to use the host 1597# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1598# else wants $(ARCH), including people doing cross-builds, which means 1599# that $(SUBARCH) doesn't work here. 1600ifeq ($(ARCH), um) 1601CHECKSTACK_ARCH := $(SUBARCH) 1602else 1603CHECKSTACK_ARCH := $(ARCH) 1604endif 1605checkstack: 1606 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1607 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1608 1609kernelrelease: 1610 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1611 1612kernelversion: 1613 @echo $(KERNELVERSION) 1614 1615image_name: 1616 @echo $(KBUILD_IMAGE) 1617 1618# Clear a bunch of variables before executing the submake 1619tools/: FORCE 1620 $(Q)mkdir -p $(objtree)/tools 1621 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ 1622 1623tools/%: FORCE 1624 $(Q)mkdir -p $(objtree)/tools 1625 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $* 1626 1627# Single targets 1628# --------------------------------------------------------------------------- 1629# Single targets are compatible with: 1630# - build with mixed source and output 1631# - build with separate output dir 'make O=...' 1632# - external modules 1633# 1634# target-dir => where to store outputfile 1635# build-dir => directory in kernel source tree to use 1636 1637ifeq ($(KBUILD_EXTMOD),) 1638 build-dir = $(patsubst %/,%,$(dir $@)) 1639 target-dir = $(dir $@) 1640else 1641 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1642 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1643 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1644endif 1645 1646%.s: %.c prepare scripts FORCE 1647 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1648%.i: %.c prepare scripts FORCE 1649 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1650%.o: %.c prepare scripts FORCE 1651 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1652%.lst: %.c prepare scripts FORCE 1653 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1654%.s: %.S prepare scripts FORCE 1655 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1656%.o: %.S prepare scripts FORCE 1657 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1658%.symtypes: %.c prepare scripts FORCE 1659 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1660%.ll: %.c prepare scripts FORCE 1661 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1662 1663# Modules 1664/: prepare scripts FORCE 1665 $(cmd_crmodverdir) 1666 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1667 $(build)=$(build-dir) 1668# Make sure the latest headers are built for Documentation 1669Documentation/ samples/: headers_install 1670%/: prepare scripts FORCE 1671 $(cmd_crmodverdir) 1672 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1673 $(build)=$(build-dir) 1674%.ko: prepare scripts FORCE 1675 $(cmd_crmodverdir) 1676 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1677 $(build)=$(build-dir) $(@:.ko=.o) 1678 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1679 1680# FIXME Should go into a make.lib or something 1681# =========================================================================== 1682 1683quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1684 cmd_rmdirs = rm -rf $(rm-dirs) 1685 1686quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1687 cmd_rmfiles = rm -f $(rm-files) 1688 1689# Run depmod only if we have System.map and depmod is executable 1690quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1691 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1692 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 1693 1694# Create temporary dir for module support files 1695# clean it up only when building all modules 1696cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1697 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1698 1699# read all saved command lines 1700 1701targets := $(wildcard $(sort $(targets))) 1702cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1703 1704ifneq ($(cmd_files),) 1705 $(cmd_files): ; # Do not try to update included dependency files 1706 include $(cmd_files) 1707endif 1708 1709endif # skip-makefile 1710 1711PHONY += FORCE 1712FORCE: 1713 1714# Declare the contents of the .PHONY variable as phony. We keep that 1715# information in a variable so we can use it in if_changed and friends. 1716.PHONY: $(PHONY) 1717