Makefile

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