Makefile

   1 VERSION = 4
   2 PATCHLEVEL = 4
   3 SUBLEVEL = 111
   4 EXTRAVERSION =
   5 NAME = Blurry Fish Butt
   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
  16 MAKEFLAGS += -rR --include-dir=$(CURDIR)
  17
  18 # Avoid funny character set dependencies
  19 unexport LC_ALL
  20 LC_COLLATE=C
  21 LC_NUMERIC=C
  22 export LC_COLLATE LC_NUMERIC
  23
  24 # Avoid interference with shell env settings
  25 unexport 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 $@ :<
  62 #
  63 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  64 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  65 #
  66 # To put more focus on warnings, be less verbose as default
  67 # Use 'make V=1' to see the full commands
  68
  69 ifeq ("$(origin V)", "command line")
  70   KBUILD_VERBOSE = $(V)
  71 endif
  72 ifndef KBUILD_VERBOSE
  73   KBUILD_VERBOSE = 0
  74 endif
  75
  76 ifeq ($(KBUILD_VERBOSE),1)
  77   quiet =
  78   Q =
  79 else
  80   quiet=quiet_
  81   Q = @
  82 endif
  83
  84 # If the user is running make -s (silent mode), suppress echoing of
  85 # commands
  86
  87 ifneq ($(filter 4.%,$(MAKE_VERSION)),)  # make-4
  88 ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
  89   quiet=silent_
  90 endif
  91 else                                    # make-3.8x
  92 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
  93   quiet=silent_
  94 endif
  95 endif
  96
  97 export quiet Q KBUILD_VERBOSE
  98
  99 # kbuild supports saving output files in a separate directory.
 100 # To locate output files in a separate directory two syntaxes are supported.
 101 # In both cases the working directory must be the root of the kernel src.
 102 # 1) O=
 103 # Use "make O=dir/to/store/output/files/"
 104 #
 105 # 2) Set KBUILD_OUTPUT
 106 # Set the environment variable KBUILD_OUTPUT to point to the directory
 107 # where the output files shall be placed.
 108 # export KBUILD_OUTPUT=dir/to/store/output/files/
 109 # make
 110 #
 111 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
 112 # variable.
 113
 114 # KBUILD_SRC is set on invocation of make in OBJ directory
 115 # KBUILD_SRC is not intended to be used by the regular user (for now)
 116 ifeq ($(KBUILD_SRC),)
 117
 118 # OK, Make called in directory where kernel src resides
 119 # Do we want to locate output files in a separate directory?
 120 ifeq ("$(origin O)", "command line")
 121   KBUILD_OUTPUT := $(O)
 122 endif
 123
 124 # That's our default target when none is given on the command line
 125 PHONY := _all
 126 _all:
 127
 128 # Cancel implicit rules on top Makefile
 129 $(CURDIR)/Makefile Makefile: ;
 130
 131 ifneq ($(words $(subst :, ,$(CURDIR))), 1)
 132   $(error main directory cannot contain spaces nor colons)
 133 endif
 134
 135 ifneq ($(KBUILD_OUTPUT),)
 136 # Invoke a second make in the output directory, passing relevant variables
 137 # check that the output directory actually exists
 138 saved-output := $(KBUILD_OUTPUT)
 139 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
 140                                                                 && /bin/pwd)
 141 $(if $(KBUILD_OUTPUT),, \
 142      $(error failed to create output directory "$(saved-output)"))
 143
 144 PHONY += $(MAKECMDGOALS) sub-make
 145
 146 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
 147         @:
 148
 149 sub-make:
 150         $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
 151         -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
 152
 153 # Leave processing to above invocation of make
 154 skip-makefile := 1
 155 endif # ifneq ($(KBUILD_OUTPUT),)
 156 endif # ifeq ($(KBUILD_SRC),)
 157
 158 # We process the rest of the Makefile if this is the final invocation of make
 159 ifeq ($(skip-makefile),)
 160
 161 # Do not print "Entering directory ...",
 162 # but we want to display it when entering to the output directory
 163 # so that IDEs/editors are able to understand relative filenames.
 164 MAKEFLAGS += --no-print-directory
 165
 166 # Call a source code checker (by default, "sparse") as part of the
 167 # C compilation.
 168 #
 169 # Use 'make C=1' to enable checking of only re-compiled files.
 170 # Use 'make C=2' to enable checking of *all* source files, regardless
 171 # of whether they are re-compiled or not.
 172 #
 173 # See the file "Documentation/sparse.txt" for more details, including
 174 # where to get the "sparse" utility.
 175
 176 ifeq ("$(origin C)", "command line")
 177   KBUILD_CHECKSRC = $(C)
 178 endif
 179 ifndef KBUILD_CHECKSRC
 180   KBUILD_CHECKSRC = 0
 181 endif
 182
 183 # Use make M=dir to specify directory of external module to build
 184 # Old syntax make ... SUBDIRS=$PWD is still supported
 185 # Setting the environment variable KBUILD_EXTMOD take precedence
 186 ifdef SUBDIRS
 187   KBUILD_EXTMOD ?= $(SUBDIRS)
 188 endif
 189
 190 ifeq ("$(origin M)", "command line")
 191   KBUILD_EXTMOD := $(M)
 192 endif
 193
 194 # If building an external module we do not care about the all: rule
 195 # but instead _all depend on modules
 196 PHONY += all
 197 ifeq ($(KBUILD_EXTMOD),)
 198 _all: all
 199 else
 200 _all: modules
 201 endif
 202
 203 ifeq ($(KBUILD_SRC),)
 204         # building in the source tree
 205         srctree := .
 206 else
 207         ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
 208                 # building in a subdirectory of the source tree
 209                 srctree := ..
 210         else
 211                 srctree := $(KBUILD_SRC)
 212         endif
 213 endif
 214 objtree         := .
 215 src             := $(srctree)
 216 obj             := $(objtree)
 217
 218 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 219
 220 export srctree objtree VPATH
 221
 222 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 223 # first, and if a usermode build is happening, the "ARCH=um" on the command
 224 # line overrides the setting of ARCH below.  If a native build is happening,
 225 # then ARCH is assigned, getting whatever value it gets normally, and
 226 # SUBARCH is subsequently ignored.
 227
 228 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
 229                                   -e s/sun4u/sparc64/ \
 230                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 231                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 232                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 233                                   -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
 234
 235 # Cross compiling and selecting different set of gcc/bin-utils
 236 # ---------------------------------------------------------------------------
 237 #
 238 # When performing cross compilation for other architectures ARCH shall be set
 239 # to the target architecture. (See arch/* for the possibilities).
 240 # ARCH can be set during invocation of make:
 241 # make ARCH=ia64
 242 # Another way is to have ARCH set in the environment.
 243 # The default ARCH is the host where make is executed.
 244
 245 # CROSS_COMPILE specify the prefix used for all executables used
 246 # during compilation. Only gcc and related bin-utils executables
 247 # are prefixed with $(CROSS_COMPILE).
 248 # CROSS_COMPILE can be set on the command line
 249 # make CROSS_COMPILE=ia64-linux-
 250 # Alternatively CROSS_COMPILE can be set in the environment.
 251 # A third alternative is to store a setting in .config so that plain
 252 # "make" in the configured kernel build directory always uses that.
 253 # Default value for CROSS_COMPILE is not to prefix executables
 254 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 255 #ARCH           ?= $(SUBARCH)
 256 #CROSS_COMPILE  ?= $(CONFIG_CROSS_COMPILE:"%"=%)
 257 ARCH            ?= arm64
 258 #CROSS_COMPILE   ?= ../PLATFORM/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-
 259 CROSS_COMPILE   ?= $(srctree)/toolchain/gcc-cfp/gcc-cfp-jopp-only/aarch64-linux-android-4.9/bin/aarch64-linux-android-
 260
 261 # Architecture as present in compile.h
 262 UTS_MACHINE     := $(ARCH)
 263 SRCARCH         := $(ARCH)
 264
 265 # Additional ARCH settings for x86
 266 ifeq ($(ARCH),i386)
 267         SRCARCH := x86
 268 endif
 269 ifeq ($(ARCH),x86_64)
 270         SRCARCH := x86
 271 endif
 272
 273 # Additional ARCH settings for sparc
 274 ifeq ($(ARCH),sparc32)
 275        SRCARCH := sparc
 276 endif
 277 ifeq ($(ARCH),sparc64)
 278        SRCARCH := sparc
 279 endif
 280
 281 # Additional ARCH settings for sh
 282 ifeq ($(ARCH),sh64)
 283        SRCARCH := sh
 284 endif
 285
 286 # Additional ARCH settings for tile
 287 ifeq ($(ARCH),tilepro)
 288        SRCARCH := tile
 289 endif
 290 ifeq ($(ARCH),tilegx)
 291        SRCARCH := tile
 292 endif
 293
 294 # Where to locate arch specific headers
 295 hdr-arch  := $(SRCARCH)
 296
 297 KCONFIG_CONFIG  ?= .config
 298 export KCONFIG_CONFIG
 299
 300 # SHELL used by kbuild
 301 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 302           else if [ -x /bin/bash ]; then echo /bin/bash; \
 303           else echo sh; fi ; fi)
 304
 305 HOSTCC       = gcc
 306 HOSTCXX      = g++
 307 HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
 308 HOSTCXXFLAGS = -O2
 309
 310 # Decide whether to build built-in, modular, or both.
 311 # Normally, just do built-in.
 312
 313 KBUILD_MODULES :=
 314 KBUILD_BUILTIN := 1
 315
 316 # If we have only "make modules", don't compile built-in objects.
 317 # When we're building modules with modversions, we need to consider
 318 # the built-in objects during the descend as well, in order to
 319 # make sure the checksums are up to date before we record them.
 320
 321 ifeq ($(MAKECMDGOALS),modules)
 322   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 323 endif
 324
 325 # If we have "make <whatever> modules", compile modules
 326 # in addition to whatever we do anyway.
 327 # Just "make" or "make all" shall build modules as well
 328
 329 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 330   KBUILD_MODULES := 1
 331 endif
 332
 333 ifeq ($(MAKECMDGOALS),)
 334   KBUILD_MODULES := 1
 335 endif
 336
 337 export KBUILD_MODULES KBUILD_BUILTIN
 338 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 339
 340 # We need some generic definitions (do not try to remake the file).
 341 scripts/Kbuild.include: ;
 342 include scripts/Kbuild.include
 343
 344 # Make variables (CC, etc...)
 345 AS              = $(CROSS_COMPILE)as
 346 LD              = $(CROSS_COMPILE)ld
 347 CC              = $(CROSS_COMPILE)gcc
 348 CPP             = $(CC) -E
 349 AR              = $(CROSS_COMPILE)ar
 350 NM              = $(CROSS_COMPILE)nm
 351 STRIP           = $(CROSS_COMPILE)strip
 352 OBJCOPY         = $(CROSS_COMPILE)objcopy
 353 OBJDUMP         = $(CROSS_COMPILE)objdump
 354 AWK             = awk
 355 GENKSYMS        = scripts/genksyms/genksyms
 356 INSTALLKERNEL  := installkernel
 357 DEPMOD          = /sbin/depmod
 358 PERL            = perl
 359 PYTHON          = python
 360 CHECK           = sparse
 361
 362 ifeq ($(CONFIG_CRYPTO_FIPS),)
 363     READELF        = $(CROSS_COMPILE)readelf
 364     export READELF
 365 endif
 366
 367 ifeq ($(CONFIG_FIPS_FMP),)
 368     READELF        = $(CROSS_COMPILE)readelf
 369     export READELF
 370 endif
 371
 372 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 373                   -Wbitwise -Wno-return-void $(CF)
 374 CFLAGS_MODULE   =
 375 AFLAGS_MODULE   =
 376 LDFLAGS_MODULE  =
 377 CFLAGS_KERNEL   =
 378 AFLAGS_KERNEL   =
 379 CFLAGS_GCOV     = -fprofile-arcs -ftest-coverage -fno-tree-loop-im
 380 CFLAGS_KCOV     = -fsanitize-coverage=trace-pc
 381
 382
 383 # Use USERINCLUDE when you must reference the UAPI directories only.
 384 USERINCLUDE    := \
 385                 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
 386                 -Iarch/$(hdr-arch)/include/generated/uapi \
 387                 -I$(srctree)/include/uapi \
 388                 -Iinclude/generated/uapi \
 389                 -include $(srctree)/include/linux/kconfig.h
 390
 391 # Use LINUXINCLUDE when you must reference the include/ directory.
 392 # Needed to be compatible with the O= option
 393 LINUXINCLUDE    := \
 394                 -I$(srctree)/arch/$(hdr-arch)/include \
 395                 -Iarch/$(hdr-arch)/include/generated/uapi \
 396                 -Iarch/$(hdr-arch)/include/generated \
 397                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
 398                 -Iinclude \
 399                 $(USERINCLUDE)
 400
 401 KBUILD_CPPFLAGS := -D__KERNEL__
 402
 403 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 404                    -fno-strict-aliasing -fno-common \
 405                    -Werror-implicit-function-declaration \
 406                    -Wno-format-security \
 407                    -Werror \
 408                    -std=gnu89 $(call cc-option,-fno-PIE)
 409
 410 KBUILD_AFLAGS_KERNEL :=
 411 KBUILD_CFLAGS_KERNEL :=
 412 KBUILD_AFLAGS   := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
 413 KBUILD_AFLAGS_MODULE  := -DMODULE
 414 KBUILD_CFLAGS_MODULE  := -DMODULE
 415 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
 416
 417 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 418 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 419 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
 420
 421 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 422 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 423 export CPP AR NM STRIP OBJCOPY OBJDUMP
 424 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
 425 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 426
 427 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 428 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN
 429 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 430 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
 431 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
 432 export KBUILD_ARFLAGS
 433
 434 # When compiling out-of-tree modules, put MODVERDIR in the module
 435 # tree rather than in the kernel tree. The kernel tree might
 436 # even be read-only.
 437 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 438
 439 # Files to ignore in find ... statements
 440
 441 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
 442                           -name CVS -o -name .pc -o -name .hg -o -name .git \) \
 443                           -prune -o
 444 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
 445                          --exclude CVS --exclude .pc --exclude .hg --exclude .git
 446
 447 # ===========================================================================
 448 # Rules shared between *config targets and build targets
 449
 450 # Basic helpers built in scripts/
 451 PHONY += scripts_basic
 452 scripts_basic:
 453         $(Q)$(MAKE) $(build)=scripts/basic
 454         $(Q)rm -f .tmp_quiet_recordmcount
 455
 456 # To avoid any implicit rule to kick in, define an empty command.
 457 scripts/basic/%: scripts_basic ;
 458
 459 PHONY += outputmakefile
 460 # outputmakefile generates a Makefile in the output directory, if using a
 461 # separate output directory. This allows convenient use of make in the
 462 # output directory.
 463 outputmakefile:
 464 ifneq ($(KBUILD_SRC),)
 465         $(Q)ln -fsn $(srctree) source
 466         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 467             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 468 endif
 469
 470 # Support for using generic headers in asm-generic
 471 PHONY += asm-generic
 472 asm-generic:
 473         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
 474                     src=asm obj=arch/$(SRCARCH)/include/generated/asm
 475         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
 476                     src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
 477
 478 ifneq ($(PLATFORM_VERSION), )
 479 PLATFORM_VERSION_NUMBER=$(shell $(CONFIG_SHELL) $(srctree)/scripts/android-version.sh $(PLATFORM_VERSION))
 480 MAJOR_VERSION=$(shell $(CONFIG_SHELL) $(srctree)/scripts/android-major-version.sh $(PLATFORM_VERSION))
 481 export ANDROID_VERSION=$(PLATFORM_VERSION_NUMBER)
 482 export ANDROID_MAJOR_VERSION=$(MAJOR_VERSION)
 483 KBUILD_CFLAGS += -DANDROID_VERSION=$(PLATFORM_VERSION_NUMBER)
 484 KBUILD_CFLAGS += -DANDROID_MAJOR_VERSION=$(MAJOR_VERSION)
 485 # Example
 486 SELINUX_DIR=$(shell $(CONFIG_SHELL) $(srctree)/scripts/find_matching_major.sh "$(srctree)" "security/selinux" "$(ANDROID_MAJOR_VERSION)")
 487 SDCARDFS_DIR=$(shell $(CONFIG_SHELL) $(srctree)/scripts/find_matching_version.sh "$(srctree)" "fs/sdcardfs" "$(ANDROID_VERSION)")
 488 else
 489 export ANDROID_VERSION=990000
 490 KBUILD_CFLAGS += -DANDROID_VERSION=990000
 491 endif
 492 PHONY += replace_dirs
 493 replace_dirs:
 494 ifneq ($(PLATFORM_VERSION), )
 495 # Example
 496         @echo "replace selinux from $(SELINUX_DIR)"
 497         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/replace_dir.sh "$(srctree)" "security/selinux" "$(SELINUX_DIR)"
 498         @echo "replace sdcardfs from $(SDCARDFS_DIR)"
 499         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/replace_dir.sh "$(srctree)" "fs/sdcardfs" "$(SDCARDFS_DIR)"
 500 endif
 501 # To make sure we do not include .config for any of the *config targets
 502 # catch them early, and hand them over to scripts/kconfig/Makefile
 503 # It is allowed to specify more targets when calling make, including
 504 # mixing *config targets and build targets.
 505 # For example 'make oldconfig all'.
 506 # Detect when mixed targets is specified, and make a second invocation
 507 # of make so .config is not included in this case either (for *config).
 508
 509 version_h := include/generated/uapi/linux/version.h
 510 old_version_h := include/linux/version.h
 511
 512 no-dot-config-targets := clean mrproper distclean \
 513                          cscope gtags TAGS tags help% %docs check% coccicheck \
 514                          $(version_h) headers_% archheaders archscripts \
 515                          kernelversion %src-pkg
 516
 517 config-targets := 0
 518 mixed-targets  := 0
 519 dot-config     := 1
 520
 521 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 522         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 523                 dot-config := 0
 524         endif
 525 endif
 526
 527 ifeq ($(KBUILD_EXTMOD),)
 528         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 529                 config-targets := 1
 530                 ifneq ($(words $(MAKECMDGOALS)),1)
 531                         mixed-targets := 1
 532                 endif
 533         endif
 534 endif
 535 # install and module_install need also be processed one by one
 536 ifneq ($(filter install,$(MAKECMDGOALS)),)
 537         ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
 538                 mixed-targets := 1
 539         endif
 540 endif
 541
 542 ifeq ($(mixed-targets),1)
 543 # ===========================================================================
 544 # We're called with mixed targets (*config and build targets).
 545 # Handle them one by one.
 546
 547 PHONY += $(MAKECMDGOALS) __build_one_by_one
 548
 549 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
 550         @:
 551
 552 __build_one_by_one:
 553         $(Q)set -e; \
 554         for i in $(MAKECMDGOALS); do \
 555                 $(MAKE) -f $(srctree)/Makefile $$i; \
 556         done
 557
 558 else
 559 ifeq ($(config-targets),1)
 560 # ===========================================================================
 561 # *config targets only - make sure prerequisites are updated, and descend
 562 # in scripts/kconfig to make the *config target
 563
 564 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 565 # KBUILD_DEFCONFIG may point out an alternative default configuration
 566 # used for 'make defconfig'
 567 include arch/$(SRCARCH)/Makefile
 568 export KBUILD_DEFCONFIG KBUILD_KCONFIG
 569
 570 config: scripts_basic outputmakefile replace_dirs FORCE
 571         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 572
 573 %config: scripts_basic outputmakefile replace_dirs FORCE
 574         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 575
 576 else
 577 # ===========================================================================
 578 # Build targets only - this includes vmlinux, arch specific targets, clean
 579 # targets and others. In general all targets except *config targets.
 580
 581 ifeq ($(KBUILD_EXTMOD),)
 582 # Additional helpers built in scripts/
 583 # Carefully list dependencies so we do not try to build scripts twice
 584 # in parallel
 585 PHONY += scripts
 586 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
 587          asm-generic
 588         $(Q)$(MAKE) $(build)=$(@)
 589
 590 # Objects we will link into vmlinux / subdirs we need to visit
 591 init-y          := init/
 592 drivers-y       := drivers/ sound/ firmware/
 593 net-y           := net/
 594 libs-y          := lib/
 595 core-y          := usr/
 596 virt-y          := virt/
 597 endif # KBUILD_EXTMOD
 598
 599 ifeq ($(dot-config),1)
 600 # Read in config
 601 -include include/config/auto.conf
 602
 603 ifeq ($(KBUILD_EXTMOD),)
 604 # Read in dependencies to all Kconfig* files, make sure to run
 605 # oldconfig if changes are detected.
 606 -include include/config/auto.conf.cmd
 607
 608 # To avoid any implicit rule to kick in, define an empty command
 609 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 610
 611 # If .config is newer than include/config/auto.conf, someone tinkered
 612 # with it and forgot to run make oldconfig.
 613 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 614 # we execute the config step to be sure to catch updated Kconfig files
 615 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 616         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 617 else
 618 # external modules needs include/generated/autoconf.h and include/config/auto.conf
 619 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 620 PHONY += include/config/auto.conf
 621
 622 include/config/auto.conf:
 623         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
 624         echo >&2;                                                       \
 625         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
 626         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
 627         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
 628         echo >&2 ;                                                      \
 629         /bin/false)
 630
 631 endif # KBUILD_EXTMOD
 632
 633 else
 634 # Dummy target needed, because used as prerequisite
 635 include/config/auto.conf: ;
 636 endif # $(dot-config)
 637
 638 # The all: target is the default when no target is given on the
 639 # command line.
 640 # This allow a user to issue only 'make' to build a kernel including modules
 641 # Defaults to vmlinux, but the arch makefile usually adds further targets
 642 all: vmlinux
 643
 644 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
 645 # values of the respective KBUILD_* variables
 646 ARCH_CPPFLAGS :=
 647 ARCH_AFLAGS :=
 648 ARCH_CFLAGS :=
 649 include arch/$(SRCARCH)/Makefile
 650
 651 KBUILD_CFLAGS   += $(call cc-option,-fno-delete-null-pointer-checks,)
 652 KBUILD_CFLAGS   += $(call cc-disable-warning,maybe-uninitialized,)
 653 KBUILD_CFLAGS   += $(call cc-disable-warning,frame-address,)
 654 KBUILD_CFLAGS   += $(call cc-disable-warning, format-truncation)
 655 KBUILD_CFLAGS   += $(call cc-disable-warning, format-overflow)
 656 KBUILD_CFLAGS   += $(call cc-disable-warning, int-in-bool-context)
 657
 658 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 659 KBUILD_CFLAGS   += $(call cc-option,-Oz,-Os)
 660 else
 661 ifdef CONFIG_PROFILE_ALL_BRANCHES
 662 KBUILD_CFLAGS   += -O2
 663 else
 664 KBUILD_CFLAGS   += -O2
 665 endif
 666 endif
 667
 668 # Tell gcc to never replace conditional load with a non-conditional one
 669 KBUILD_CFLAGS   += $(call cc-option,--param=allow-store-data-races=0)
 670
 671 # check for 'asm goto'
 672 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
 673         KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
 674         KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
 675 endif
 676
 677 ifdef CONFIG_READABLE_ASM
 678 # Disable optimizations that make assembler listings hard to read.
 679 # reorder blocks reorders the control in the function
 680 # ipa clone creates specialized cloned functions
 681 # partial inlining inlines only parts of functions
 682 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
 683                  $(call cc-option,-fno-ipa-cp-clone,) \
 684                  $(call cc-option,-fno-partial-inlining)
 685 endif
 686
 687 ifneq ($(CONFIG_FRAME_WARN),0)
 688 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 689 endif
 690
 691 # Handle stack protector mode.
 692 #
 693 # Since kbuild can potentially perform two passes (first with the old
 694 # .config values and then with updated .config values), we cannot error out
 695 # if a desired compiler option is unsupported. If we were to error, kbuild
 696 # could never get to the second pass and actually notice that we changed
 697 # the option to something that was supported.
 698 #
 699 # Additionally, we don't want to fallback and/or silently change which compiler
 700 # flags will be used, since that leads to producing kernels with different
 701 # security feature characteristics depending on the compiler used. ("But I
 702 # selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
 703 #
 704 # The middle ground is to warn here so that the failed option is obvious, but
 705 # to let the build fail with bad compiler flags so that we can't produce a
 706 # kernel when there is a CONFIG and compiler mismatch.
 707 #
 708 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
 709   stackp-flag := -fstack-protector
 710   ifeq ($(call cc-option, $(stackp-flag)),)
 711     $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
 712              -fstack-protector not supported by compiler)
 713   endif
 714 else
 715 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
 716   stackp-flag := -fstack-protector-strong
 717   ifeq ($(call cc-option, $(stackp-flag)),)
 718     $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
 719               -fstack-protector-strong not supported by compiler)
 720   endif
 721 else
 722   # Force off for distro compilers that enable stack protector by default.
 723   stackp-flag := $(call cc-option, -fno-stack-protector)
 724 endif
 725 endif
 726 KBUILD_CFLAGS += $(stackp-flag)
 727
 728 ifdef CONFIG_KCOV
 729   ifeq ($(call cc-option, $(CFLAGS_KCOV)),)
 730     $(warning Cannot use CONFIG_KCOV: \
 731              -fsanitize-coverage=trace-pc is not supported by compiler)
 732     CFLAGS_KCOV =
 733   endif
 734 endif
 735
 736 ifeq ($(cc-name),clang)
 737 ifneq ($(CROSS_COMPILE),)
 738 CLANG_TRIPLE    ?= $(CROSS_COMPILE)
 739 CLANG_TARGET    := --target=$(notdir $(CLANG_TRIPLE:%-=%))
 740 GCC_TOOLCHAIN   := $(realpath $(dir $(shell which $(LD)))/..)
 741 endif
 742 ifneq ($(GCC_TOOLCHAIN),)
 743 CLANG_GCC_TC    := --gcc-toolchain=$(GCC_TOOLCHAIN)
 744 endif
 745 KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
 746 KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
 747 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
 748 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
 749 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
 750 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
 751 KBUILD_CFLAGS += $(call cc-disable-warning, duplicate-decl-specifier)
 752 # Quiet clang warning: comparison of unsigned expression < 0 is always false
 753 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
 754 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
 755 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
 756 # See modpost pattern 2
 757 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
 758 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
 759 KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
 760 KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
 761 else
 762
 763 # These warnings generated too much noise in a regular build.
 764 # Use make W=1 to enable them (see scripts/Makefile.build)
 765 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
 766 endif
 767
 768 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
 769 ifdef CONFIG_FRAME_POINTER
 770 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 771 else
 772 # Some targets (ARM with Thumb2, for example), can't be built with frame
 773 # pointers.  For those, we don't have FUNCTION_TRACER automatically
 774 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
 775 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
 776 # -fomit-frame-pointer with FUNCTION_TRACER.
 777 ifndef CONFIG_FUNCTION_TRACER
 778 KBUILD_CFLAGS   += -fomit-frame-pointer
 779 endif
 780 endif
 781
 782 KBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
 783
 784 ifdef CONFIG_DEBUG_INFO
 785 ifdef CONFIG_DEBUG_INFO_SPLIT
 786 KBUILD_CFLAGS   += $(call cc-option, -gsplit-dwarf, -g)
 787 else
 788 KBUILD_CFLAGS   += -g
 789 endif
 790 KBUILD_AFLAGS   += -Wa,-gdwarf-2
 791 endif
 792 ifdef CONFIG_DEBUG_INFO_DWARF4
 793 KBUILD_CFLAGS   += $(call cc-option, -gdwarf-4,)
 794 endif
 795
 796 ifdef CONFIG_DEBUG_INFO_REDUCED
 797 KBUILD_CFLAGS   += $(call cc-option, -femit-struct-debug-baseonly) \
 798                    $(call cc-option,-fno-var-tracking)
 799 endif
 800
 801 ifdef CONFIG_FUNCTION_TRACER
 802 ifndef CC_FLAGS_FTRACE
 803 CC_FLAGS_FTRACE := -pg
 804 endif
 805 export CC_FLAGS_FTRACE
 806 ifdef CONFIG_HAVE_FENTRY
 807 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
 808 endif
 809 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
 810 KBUILD_AFLAGS   += $(CC_USING_FENTRY)
 811 ifdef CONFIG_DYNAMIC_FTRACE
 812         ifdef CONFIG_HAVE_C_RECORDMCOUNT
 813                 BUILD_C_RECORDMCOUNT := y
 814                 export BUILD_C_RECORDMCOUNT
 815         endif
 816 endif
 817 endif
 818
 819 # We trigger additional mismatches with less inlining
 820 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 821 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 822 endif
 823
 824 # arch Makefile may override CC so keep this after arch Makefile is included
 825 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 826 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 827
 828 # warn about C99 declaration after statement
 829 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 830
 831 # disable pointer signed / unsigned warnings in gcc 4.0
 832 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
 833
 834 # disable invalid "can't wrap" optimizations for signed / pointers
 835 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
 836
 837 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
 838 KBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
 839
 840 # conserve stack if available
 841 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
 842
 843 # disallow errors like 'EXPORT_GPL(foo);' with missing header
 844 KBUILD_CFLAGS   += $(call cc-option,-Werror=implicit-int)
 845
 846 # require functions to have arguments in prototypes, not empty 'int foo()'
 847 KBUILD_CFLAGS   += $(call cc-option,-Werror=strict-prototypes)
 848
 849 # Prohibit date/time macros, which would make the build non-deterministic
 850 KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
 851
 852 # use the deterministic mode of AR if available
 853 KBUILD_ARFLAGS := $(call ar-option,D)
 854
 855 include scripts/Makefile.kasan
 856 include scripts/Makefile.extrawarn
 857
 858 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
 859 # last assignments
 860 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
 861 KBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
 862 KBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
 863
 864 ifeq ($(CONFIG_SENSORS_FINGERPRINT), y)
 865 ifneq ($(CONFIG_SEC_FACTORY), true)
 866 ifneq ($(SEC_BUILD_CONF_USE_FINGERPRINT_TZ), false)
 867     export KBUILD_FP_SENSOR_CFLAGS := -DENABLE_SENSORS_FPRINT_SECURE
 868 endif
 869 endif
 870 endif
 871
 872 # Use --build-id when available.
 873 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 874                               $(call cc-ldoption, -Wl$(comma)--build-id,))
 875 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 876 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 877
 878 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
 879 LDFLAGS_vmlinux += $(call ld-option, -X,)
 880 endif
 881
 882 # Default kernel image to build when no specific target is given.
 883 # KBUILD_IMAGE may be overruled on the command line or
 884 # set in the environment
 885 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 886 # this default value
 887 export KBUILD_IMAGE ?= vmlinux
 888
 889 #
 890 # INSTALL_PATH specifies where to place the updated kernel and system map
 891 # images. Default is /boot, but you can set it to other values
 892 export  INSTALL_PATH ?= /boot
 893
 894 #
 895 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
 896 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
 897 # an argument if needed. Otherwise it defaults to the kernel install path
 898 #
 899 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
 900
 901 #
 902 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 903 # relocations required by build roots.  This is not defined in the
 904 # makefile but the argument can be passed to make if needed.
 905 #
 906
 907 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 908 export MODLIB
 909
 910 #
 911 # INSTALL_MOD_STRIP, if defined, will cause modules to be
 912 # stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 913 # the default option --strip-debug will be used.  Otherwise,
 914 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
 915
 916 ifdef INSTALL_MOD_STRIP
 917 ifeq ($(INSTALL_MOD_STRIP),1)
 918 mod_strip_cmd = $(STRIP) --strip-debug
 919 else
 920 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 921 endif # INSTALL_MOD_STRIP=1
 922 else
 923 mod_strip_cmd = true
 924 endif # INSTALL_MOD_STRIP
 925 export mod_strip_cmd
 926
 927 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
 928 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
 929 # or CONFIG_MODULE_COMPRESS_XZ.
 930
 931 mod_compress_cmd = true
 932 ifdef CONFIG_MODULE_COMPRESS
 933   ifdef CONFIG_MODULE_COMPRESS_GZIP
 934     mod_compress_cmd = gzip -n -f
 935   endif # CONFIG_MODULE_COMPRESS_GZIP
 936   ifdef CONFIG_MODULE_COMPRESS_XZ
 937     mod_compress_cmd = xz -f
 938   endif # CONFIG_MODULE_COMPRESS_XZ
 939 endif # CONFIG_MODULE_COMPRESS
 940 export mod_compress_cmd
 941
 942 # Select initial ramdisk compression format, default is gzip(1).
 943 # This shall be used by the dracut(8) tool while creating an initramfs image.
 944 #
 945 INITRD_COMPRESS-y                  := gzip
 946 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
 947 INITRD_COMPRESS-$(CONFIG_RD_LZMA)  := lzma
 948 INITRD_COMPRESS-$(CONFIG_RD_XZ)    := xz
 949 INITRD_COMPRESS-$(CONFIG_RD_LZO)   := lzo
 950 INITRD_COMPRESS-$(CONFIG_RD_LZ4)   := lz4
 951 # do not export INITRD_COMPRESS, since we didn't actually
 952 # choose a sane default compression above.
 953 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
 954
 955 ifdef CONFIG_MODULE_SIG_ALL
 956 $(eval $(call config_filename,MODULE_SIG_KEY))
 957
 958 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
 959 else
 960 mod_sign_cmd = true
 961 endif
 962 export mod_sign_cmd
 963
 964
 965 ifeq ($(KBUILD_EXTMOD),)
 966 core-y          += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
 967
 968 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 969                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 970                      $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
 971
 972 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 973                      $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
 974
 975 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 976 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 977 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 978 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 979 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 980 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 981 libs-y          := $(libs-y1) $(libs-y2)
 982 virt-y          := $(patsubst %/, %/built-in.o, $(virt-y))
 983
 984 # Externally visible symbols (used by link-vmlinux.sh)
 985 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
 986 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
 987 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
 988 export LDFLAGS_vmlinux
 989 # used by scripts/pacmage/Makefile
 990 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
 991
 992 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
 993
 994 # Final link of vmlinux
 995       cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
 996 quiet_cmd_link-vmlinux = LINK    $@
 997
 998 # Include targets which we want to
 999 # execute if the rest of the kernel build went well.
1000 vmlinux: scripts/link-vmlinux.sh print_info $(vmlinux-deps) FORCE
1001 ifdef CONFIG_HEADERS_CHECK
1002         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
1003 endif
1004 ifdef CONFIG_SAMPLES
1005         $(Q)$(MAKE) $(build)=samples
1006 endif
1007 ifdef CONFIG_BUILD_DOCSRC
1008         $(Q)$(MAKE) $(build)=Documentation
1009 endif
1010 ifdef CONFIG_GDB_SCRIPTS
1011         $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
1012 endif
1013         +$(call if_changed,link-vmlinux)
1014
1015 PHONY += print_info
1016 print_info:
1017         @echo "INFO: CC is $(CC)"
1018
1019 # The actual objects are generated when descending,
1020 # make sure no implicit rule kicks in
1021 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1022
1023 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1024 # Preset locale variables to speed up the build process. Limit locale
1025 # tweaks to this spot to avoid wrong language settings when running
1026 # make menuconfig etc.
1027 # Error messages still appears in the original language
1028
1029 PHONY += $(vmlinux-dirs)
1030 $(vmlinux-dirs): prepare scripts
1031         $(Q)$(MAKE) $(build)=$@
1032
1033 define filechk_kernel.release
1034         echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1035 endef
1036
1037 # Store (new) KERNELRELEASE string in include/config/kernel.release
1038 include/config/kernel.release: include/config/auto.conf FORCE
1039         $(call filechk,kernel.release)
1040
1041
1042 # Things we need to do before we recursively start building the kernel
1043 # or the modules are listed in "prepare".
1044 # A multi level approach is used. prepareN is processed before prepareN-1.
1045 # archprepare is used in arch Makefiles and when processed asm symlink,
1046 # version.h and scripts_basic is processed / created.
1047
1048 # Listed in dependency order
1049 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
1050
1051 # prepare3 is used to check if we are building in a separate output directory,
1052 # and if so do:
1053 # 1) Check that make has not been executed in the kernel src $(srctree)
1054 prepare3: include/config/kernel.release
1055 ifneq ($(KBUILD_SRC),)
1056         @$(kecho) '  Using $(srctree) as source for kernel'
1057         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1058                 echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
1059                 echo >&2 "  in the '$(srctree)' directory.";\
1060                 /bin/false; \
1061         fi;
1062 endif
1063
1064 # prepare2 creates a makefile if using a separate output directory
1065 prepare2: prepare3 outputmakefile asm-generic
1066
1067 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
1068                    include/config/auto.conf
1069         $(cmd_crmodverdir)
1070
1071 archprepare: archheaders archscripts prepare1 scripts_basic
1072
1073 prepare0: archprepare
1074         $(Q)$(MAKE) $(build)=.
1075
1076 # All the preparing..
1077 prepare: prepare0
1078
1079 # Generate some files
1080 # ---------------------------------------------------------------------------
1081
1082 # KERNELRELEASE can change from a few different places, meaning version.h
1083 # needs to be updated, so this check is forced on all builds
1084
1085 uts_len := 64
1086 define filechk_utsrelease.h
1087         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1088           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1089           exit 1;                                                         \
1090         fi;                                                               \
1091         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1092 endef
1093
1094 define filechk_version.h
1095         (echo \#define LINUX_VERSION_CODE $(shell                         \
1096         expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1097         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1098 endef
1099
1100 $(version_h): $(srctree)/Makefile FORCE
1101         $(call filechk,version.h)
1102         $(Q)rm -f $(old_version_h)
1103
1104 include/generated/utsrelease.h: include/config/kernel.release FORCE
1105         $(call filechk,utsrelease.h)
1106
1107 PHONY += headerdep
1108 headerdep:
1109         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1110         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1111
1112 # ---------------------------------------------------------------------------
1113 # Firmware install
1114 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1115 export INSTALL_FW_PATH
1116
1117 PHONY += firmware_install
1118 firmware_install:
1119         @mkdir -p $(objtree)/firmware
1120         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1121
1122 # ---------------------------------------------------------------------------
1123 # Kernel headers
1124
1125 #Default location for installed headers
1126 export INSTALL_HDR_PATH = $(objtree)/usr
1127
1128 # If we do an all arch process set dst to asm-$(hdr-arch)
1129 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1130
1131 PHONY += archheaders
1132 archheaders:
1133
1134 PHONY += archscripts
1135 archscripts:
1136
1137 PHONY += __headers
1138 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts
1139         $(Q)$(MAKE) $(build)=scripts build_unifdef
1140
1141 PHONY += headers_install_all
1142 headers_install_all:
1143         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1144
1145 PHONY += headers_install
1146 headers_install: __headers
1147         $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1148           $(error Headers not exportable for the $(SRCARCH) architecture))
1149         $(Q)$(MAKE) $(hdr-inst)=include/uapi
1150         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
1151
1152 PHONY += headers_check_all
1153 headers_check_all: headers_install_all
1154         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1155
1156 PHONY += headers_check
1157 headers_check: headers_install
1158         $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1159         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
1160
1161 # ---------------------------------------------------------------------------
1162 # Kernel selftest
1163
1164 PHONY += kselftest
1165 kselftest:
1166         $(Q)$(MAKE) -C tools/testing/selftests run_tests
1167
1168 kselftest-clean:
1169         $(Q)$(MAKE) -C tools/testing/selftests clean
1170
1171 # ---------------------------------------------------------------------------
1172 # Modules
1173
1174 ifdef CONFIG_MODULES
1175
1176 # By default, build modules as well
1177
1178 all: modules
1179
1180 # Build modules
1181 #
1182 # A module can be listed more than once in obj-m resulting in
1183 # duplicate lines in modules.order files.  Those are removed
1184 # using awk while concatenating to the final file.
1185
1186 PHONY += modules
1187 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1188         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1189         @$(kecho) '  Building modules, stage 2.';
1190         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1191         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1192
1193 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1194         $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1195
1196 %/modules.builtin: include/config/auto.conf
1197         $(Q)$(MAKE) $(modbuiltin)=$*
1198
1199
1200 # Target to prepare building external modules
1201 PHONY += modules_prepare
1202 modules_prepare: prepare scripts
1203
1204 # Target to install modules
1205 PHONY += modules_install
1206 modules_install: _modinst_ _modinst_post
1207
1208 PHONY += _modinst_
1209 _modinst_:
1210         @rm -rf $(MODLIB)/kernel
1211         @rm -f $(MODLIB)/source
1212         @mkdir -p $(MODLIB)/kernel
1213         @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1214         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1215                 rm -f $(MODLIB)/build ; \
1216                 ln -s $(CURDIR) $(MODLIB)/build ; \
1217         fi
1218         @cp -f $(objtree)/modules.order $(MODLIB)/
1219         @cp -f $(objtree)/modules.builtin $(MODLIB)/
1220         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1221
1222 # This depmod is only for convenience to give the initial
1223 # boot a modules.dep even before / is mounted read-write.  However the
1224 # boot script depmod is the master version.
1225 PHONY += _modinst_post
1226 _modinst_post: _modinst_
1227         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1228         $(call cmd,depmod)
1229
1230 ifeq ($(CONFIG_MODULE_SIG), y)
1231 PHONY += modules_sign
1232 modules_sign:
1233         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1234 endif
1235
1236 else # CONFIG_MODULES
1237
1238 # Modules not configured
1239 # ---------------------------------------------------------------------------
1240
1241 modules modules_install: FORCE
1242         @echo >&2
1243         @echo >&2 "The present kernel configuration has modules disabled."
1244         @echo >&2 "Type 'make config' and enable loadable module support."
1245         @echo >&2 "Then build a kernel with module support enabled."
1246         @echo >&2
1247         @exit 1
1248
1249 endif # CONFIG_MODULES
1250
1251 ###
1252 # Cleaning is done on three levels.
1253 # make clean     Delete most generated files
1254 #                Leave enough to build external modules
1255 # make mrproper  Delete the current configuration, and all generated files
1256 # make distclean Remove editor backup files, patch leftover files and the like
1257
1258 # Directories & files removed with 'make clean'
1259 CLEAN_DIRS  += $(MODVERDIR)
1260
1261 # Directories & files removed with 'make mrproper'
1262 MRPROPER_DIRS  += include/config usr/include include/generated          \
1263                   arch/*/include/generated .tmp_objdiff
1264 MRPROPER_FILES += .config .config.old .version .old_version \
1265                   Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1266                   signing_key.pem signing_key.priv signing_key.x509     \
1267                   x509.genkey extra_certificates signing_key.x509.keyid \
1268                   signing_key.x509.signer vmlinux-gdb.py
1269
1270 # clean - Delete most, but leave enough to build external modules
1271 #
1272 clean: rm-dirs  := $(CLEAN_DIRS)
1273 clean: rm-files := $(CLEAN_FILES)
1274 clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1275
1276 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1277 $(clean-dirs):
1278         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1279
1280 vmlinuxclean:
1281         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1282
1283 clean: archclean vmlinuxclean
1284
1285 # mrproper - Delete all generated files, including .config
1286 #
1287 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1288 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1289 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1290
1291 PHONY += $(mrproper-dirs) mrproper archmrproper
1292 $(mrproper-dirs):
1293         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1294
1295 mrproper: clean archmrproper $(mrproper-dirs)
1296         $(call cmd,rmdirs)
1297         $(call cmd,rmfiles)
1298
1299 # distclean
1300 #
1301 PHONY += distclean
1302
1303 distclean: mrproper
1304         @find $(srctree) $(RCS_FIND_IGNORE) \
1305                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1306                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1307                 -o -name '.*.rej' -o -name '*%'  -o -name 'core' \) \
1308                 -type f -print | xargs rm -f
1309
1310
1311 # Packaging of the kernel to various formats
1312 # ---------------------------------------------------------------------------
1313 # rpm target kept for backward compatibility
1314 package-dir     := scripts/package
1315
1316 %src-pkg: FORCE
1317         $(Q)$(MAKE) $(build)=$(package-dir) $@
1318 %pkg: include/config/kernel.release FORCE
1319         $(Q)$(MAKE) $(build)=$(package-dir) $@
1320 rpm: include/config/kernel.release FORCE
1321         $(Q)$(MAKE) $(build)=$(package-dir) $@
1322
1323
1324 # Brief documentation of the typical targets used
1325 # ---------------------------------------------------------------------------
1326
1327 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1328 boards := $(sort $(notdir $(boards)))
1329 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1330 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1331
1332 help:
1333         @echo  'Cleaning targets:'
1334         @echo  '  clean           - Remove most generated files but keep the config and'
1335         @echo  '                    enough build support to build external modules'
1336         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1337         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1338         @echo  ''
1339         @echo  'Configuration targets:'
1340         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1341         @echo  ''
1342         @echo  'Other generic targets:'
1343         @echo  '  all             - Build all targets marked with [*]'
1344         @echo  '* vmlinux         - Build the bare kernel'
1345         @echo  '* modules         - Build all modules'
1346         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1347         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1348         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1349         @echo  '  dir/            - Build all files in dir and below'
1350         @echo  '  dir/file.[ois]  - Build specified target only'
1351         @echo  '  dir/file.ll     - Build the LLVM assembly file'
1352         @echo  '                    (requires compiler support for LLVM assembly generation)'
1353         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1354         @echo  '                    (requires a recent binutils and recent build (System.map))'
1355         @echo  '  dir/file.ko     - Build module including final link'
1356         @echo  '  modules_prepare - Set up for building external modules'
1357         @echo  '  tags/TAGS       - Generate tags file for editors'
1358         @echo  '  cscope          - Generate cscope index'
1359         @echo  '  gtags           - Generate GNU GLOBAL index'
1360         @echo  '  kernelrelease   - Output the release version string (use with make -s)'
1361         @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
1362         @echo  '  image_name      - Output the image name (use with make -s)'
1363         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1364          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1365          echo  ''
1366         @echo  'Static analysers'
1367         @echo  '  checkstack      - Generate a list of stack hogs'
1368         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1369         @echo  '  versioncheck    - Sanity check on version.h usage'
1370         @echo  '  includecheck    - Check for duplicate included header files'
1371         @echo  '  export_report   - List the usages of all exported symbols'
1372         @echo  '  headers_check   - Sanity check on exported headers'
1373         @echo  '  headerdep       - Detect inclusion cycles in headers'
1374         @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1375         @echo  ''
1376         @echo  'Kernel selftest'
1377         @echo  '  kselftest       - Build and run kernel selftest (run as root)'
1378         @echo  '                    Build, install, and boot kernel before'
1379         @echo  '                    running kselftest on it'
1380         @echo  '  kselftest-clean - Remove all generated kselftest files'
1381         @echo  ''
1382         @echo  'Kernel packaging:'
1383         @$(MAKE) $(build)=$(package-dir) help
1384         @echo  ''
1385         @echo  'Documentation targets:'
1386         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1387         @echo  ''
1388         @echo  'Architecture specific targets ($(SRCARCH)):'
1389         @$(if $(archhelp),$(archhelp),\
1390                 echo '  No architecture specific help defined for $(SRCARCH)')
1391         @echo  ''
1392         @$(if $(boards), \
1393                 $(foreach b, $(boards), \
1394                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1395                 echo '')
1396         @$(if $(board-dirs), \
1397                 $(foreach b, $(board-dirs), \
1398                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1399                 printf "  %-16s - Show all of the above\\n" help-boards; \
1400                 echo '')
1401
1402         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1403         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1404         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1405         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1406         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1407         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1408         @echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
1409         @echo  '                1: warnings which may be relevant and do not occur too often'
1410         @echo  '                2: warnings which occur quite often but may still be relevant'
1411         @echo  '                3: more obscure warnings, can most likely be ignored'
1412         @echo  '                Multiple levels can be combined with W=12 or W=123'
1413         @echo  ''
1414         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1415         @echo  'For further info see the ./README file'
1416
1417
1418 help-board-dirs := $(addprefix help-,$(board-dirs))
1419
1420 help-boards: $(help-board-dirs)
1421
1422 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1423
1424 $(help-board-dirs): help-%:
1425         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1426         @$(if $(boards-per-dir), \
1427                 $(foreach b, $(boards-per-dir), \
1428                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1429                 echo '')
1430
1431
1432 # Documentation targets
1433 # ---------------------------------------------------------------------------
1434 %docs: scripts_basic FORCE
1435         $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
1436         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1437
1438 else # KBUILD_EXTMOD
1439
1440 ###
1441 # External module support.
1442 # When building external modules the kernel used as basis is considered
1443 # read-only, and no consistency checks are made and the make
1444 # system is not used on the basis kernel. If updates are required
1445 # in the basis kernel ordinary make commands (without M=...) must
1446 # be used.
1447 #
1448 # The following are the only valid targets when building external
1449 # modules.
1450 # make M=dir clean     Delete all automatically generated files
1451 # make M=dir modules   Make all modules in specified dir
1452 # make M=dir           Same as 'make M=dir modules'
1453 # make M=dir modules_install
1454 #                      Install the modules built in the module directory
1455 #                      Assumes install directory is already created
1456
1457 # We are always building modules
1458 KBUILD_MODULES := 1
1459 PHONY += crmodverdir
1460 crmodverdir:
1461         $(cmd_crmodverdir)
1462
1463 PHONY += $(objtree)/Module.symvers
1464 $(objtree)/Module.symvers:
1465         @test -e $(objtree)/Module.symvers || ( \
1466         echo; \
1467         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1468         echo "           is missing; modules will have no dependencies and modversions."; \
1469         echo )
1470
1471 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1472 PHONY += $(module-dirs) modules
1473 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1474         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1475
1476 modules: $(module-dirs)
1477         @$(kecho) '  Building modules, stage 2.';
1478         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1479
1480 PHONY += modules_install
1481 modules_install: _emodinst_ _emodinst_post
1482
1483 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1484 PHONY += _emodinst_
1485 _emodinst_:
1486         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1487         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1488
1489 PHONY += _emodinst_post
1490 _emodinst_post: _emodinst_
1491         $(call cmd,depmod)
1492
1493 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1494
1495 PHONY += $(clean-dirs) clean
1496 $(clean-dirs):
1497         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1498
1499 clean:  rm-dirs := $(MODVERDIR)
1500 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1501
1502 help:
1503         @echo  '  Building external modules.'
1504         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1505         @echo  ''
1506         @echo  '  modules         - default target, build the module(s)'
1507         @echo  '  modules_install - install the module'
1508         @echo  '  clean           - remove generated files in module directory only'
1509         @echo  ''
1510
1511 # Dummies...
1512 PHONY += prepare scripts
1513 prepare: ;
1514 scripts: ;
1515 endif # KBUILD_EXTMOD
1516
1517 clean: $(clean-dirs)
1518         $(call cmd,rmdirs)
1519         $(call cmd,rmfiles)
1520         @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1521                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1522                 -o -name '*.ko.*' \
1523                 -o -name '*.dwo'  \
1524                 -o -name '*.su'  \
1525                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1526                 -o -name '*.symtypes' -o -name 'modules.order' \
1527                 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1528                 -o -name '*.ll' \
1529                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1530
1531 # Generate tags for editors
1532 # ---------------------------------------------------------------------------
1533 quiet_cmd_tags = GEN     $@
1534       cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1535
1536 tags TAGS cscope gtags: FORCE
1537         $(call cmd,tags)
1538
1539 # Scripts to check various things for consistency
1540 # ---------------------------------------------------------------------------
1541
1542 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1543
1544 includecheck:
1545         find $(srctree)/* $(RCS_FIND_IGNORE) \
1546                 -name '*.[hcS]' -type f -print | sort \
1547                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1548
1549 versioncheck:
1550         find $(srctree)/* $(RCS_FIND_IGNORE) \
1551                 -name '*.[hcS]' -type f -print | sort \
1552                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1553
1554 coccicheck:
1555         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1556
1557 namespacecheck:
1558         $(PERL) $(srctree)/scripts/namespace.pl
1559
1560 export_report:
1561         $(PERL) $(srctree)/scripts/export_report.pl
1562
1563 endif #ifeq ($(config-targets),1)
1564 endif #ifeq ($(mixed-targets),1)
1565
1566 PHONY += checkstack kernelrelease kernelversion image_name
1567
1568 # UML needs a little special treatment here.  It wants to use the host
1569 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1570 # else wants $(ARCH), including people doing cross-builds, which means
1571 # that $(SUBARCH) doesn't work here.
1572 ifeq ($(ARCH), um)
1573 CHECKSTACK_ARCH := $(SUBARCH)
1574 else
1575 CHECKSTACK_ARCH := $(ARCH)
1576 endif
1577 checkstack:
1578         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1579         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1580
1581 kernelrelease:
1582         @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1583
1584 kernelversion:
1585         @echo $(KERNELVERSION)
1586
1587 image_name:
1588         @echo $(KBUILD_IMAGE)
1589
1590 # Clear a bunch of variables before executing the submake
1591 tools/: FORCE
1592         $(Q)mkdir -p $(objtree)/tools
1593         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
1594
1595 tools/%: FORCE
1596         $(Q)mkdir -p $(objtree)/tools
1597         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
1598
1599 # Single targets
1600 # ---------------------------------------------------------------------------
1601 # Single targets are compatible with:
1602 # - build with mixed source and output
1603 # - build with separate output dir 'make O=...'
1604 # - external modules
1605 #
1606 #  target-dir => where to store outputfile
1607 #  build-dir  => directory in kernel source tree to use
1608
1609 ifeq ($(KBUILD_EXTMOD),)
1610         build-dir  = $(patsubst %/,%,$(dir $@))
1611         target-dir = $(dir $@)
1612 else
1613         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1614         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1615         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1616 endif
1617
1618 %.s: %.c prepare scripts FORCE
1619         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1620 %.i: %.c prepare scripts FORCE
1621         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1622 %.o: %.c prepare scripts FORCE
1623         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1624 %.lst: %.c prepare scripts FORCE
1625         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1626 %.s: %.S prepare scripts FORCE
1627         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1628 %.o: %.S prepare scripts FORCE
1629         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1630 %.symtypes: %.c prepare scripts FORCE
1631         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1632 %.ll: %.c prepare scripts FORCE
1633         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1634
1635 # Modules
1636 /: prepare scripts FORCE
1637         $(cmd_crmodverdir)
1638         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1639         $(build)=$(build-dir)
1640 # Make sure the latest headers are built for Documentation
1641 Documentation/: headers_install
1642 %/: prepare scripts FORCE
1643         $(cmd_crmodverdir)
1644         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1645         $(build)=$(build-dir)
1646 %.ko: prepare scripts FORCE
1647         $(cmd_crmodverdir)
1648         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1649         $(build)=$(build-dir) $(@:.ko=.o)
1650         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1651
1652 # FIXME Should go into a make.lib or something
1653 # ===========================================================================
1654
1655 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1656       cmd_rmdirs = rm -rf $(rm-dirs)
1657
1658 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1659       cmd_rmfiles = rm -f $(rm-files)
1660
1661 # Run depmod only if we have System.map and depmod is executable
1662 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1663       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1664                    $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1665
1666 # Create temporary dir for module support files
1667 # clean it up only when building all modules
1668 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1669                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1670
1671 # read all saved command lines
1672
1673 targets := $(wildcard $(sort $(targets)))
1674 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1675
1676 ifneq ($(cmd_files),)
1677   $(cmd_files): ;       # Do not try to update included dependency files
1678   include $(cmd_files)
1679 endif
1680
1681 endif   # skip-makefile
1682
1683 PHONY += FORCE
1684 FORCE:
1685
1686 # Declare the contents of the .PHONY variable as phony.  We keep that
1687 # information in a variable so we can use it in if_changed and friends.
1688 .PHONY: $(PHONY)