Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 23
   4 EXTRAVERSION =-rc6
   5 NAME = Pink Farting Weasel
   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 avoid hard-to-debug behavour);
  16 # o  print "Entering directory ...";
  17 MAKEFLAGS += -rR --no-print-directory
  18
  19 # Add custom flags here to avoid conflict with updates
  20 EXTRAVERSION := $(EXTRAVERSION)-omap1
  21
  22 # We are using a recursive build, so we need to do a little thinking
  23 # to get the ordering right.
  24 #
  25 # Most importantly: sub-Makefiles should only ever modify files in
  26 # their own directory. If in some directory we have a dependency on
  27 # a file in another dir (which doesn't happen often, but it's often
  28 # unavoidable when linking the built-in.o targets which finally
  29 # turn into vmlinux), we will call a sub make in that other dir, and
  30 # after that we are sure that everything which is in that other dir
  31 # is now up to date.
  32 #
  33 # The only cases where we need to modify files which have global
  34 # effects are thus separated out and done before the recursive
  35 # descending is started. They are now explicitly listed as the
  36 # prepare rule.
  37
  38 # To put more focus on warnings, be less verbose as default
  39 # Use 'make V=1' to see the full commands
  40
  41 ifdef V
  42   ifeq ("$(origin V)", "command line")
  43     KBUILD_VERBOSE = $(V)
  44   endif
  45 endif
  46 ifndef KBUILD_VERBOSE
  47   KBUILD_VERBOSE = 0
  48 endif
  49
  50 # Call a source code checker (by default, "sparse") as part of the
  51 # C compilation.
  52 #
  53 # Use 'make C=1' to enable checking of only re-compiled files.
  54 # Use 'make C=2' to enable checking of *all* source files, regardless
  55 # of whether they are re-compiled or not.
  56 #
  57 # See the file "Documentation/sparse.txt" for more details, including
  58 # where to get the "sparse" utility.
  59
  60 ifdef C
  61   ifeq ("$(origin C)", "command line")
  62     KBUILD_CHECKSRC = $(C)
  63   endif
  64 endif
  65 ifndef KBUILD_CHECKSRC
  66   KBUILD_CHECKSRC = 0
  67 endif
  68
  69 # Use make M=dir to specify directory of external module to build
  70 # Old syntax make ... SUBDIRS=$PWD is still supported
  71 # Setting the environment variable KBUILD_EXTMOD take precedence
  72 ifdef SUBDIRS
  73   KBUILD_EXTMOD ?= $(SUBDIRS)
  74 endif
  75 ifdef M
  76   ifeq ("$(origin M)", "command line")
  77     KBUILD_EXTMOD := $(M)
  78   endif
  79 endif
  80
  81
  82 # kbuild supports saving output files in a separate directory.
  83 # To locate output files in a separate directory two syntaxes are supported.
  84 # In both cases the working directory must be the root of the kernel src.
  85 # 1) O=
  86 # Use "make O=dir/to/store/output/files/"
  87 #
  88 # 2) Set KBUILD_OUTPUT
  89 # Set the environment variable KBUILD_OUTPUT to point to the directory
  90 # where the output files shall be placed.
  91 # export KBUILD_OUTPUT=dir/to/store/output/files/
  92 # make
  93 #
  94 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  95 # variable.
  96
  97
  98 # KBUILD_SRC is set on invocation of make in OBJ directory
  99 # KBUILD_SRC is not intended to be used by the regular user (for now)
 100 ifeq ($(KBUILD_SRC),)
 101
 102 # OK, Make called in directory where kernel src resides
 103 # Do we want to locate output files in a separate directory?
 104 ifdef O
 105   ifeq ("$(origin O)", "command line")
 106     KBUILD_OUTPUT := $(O)
 107   endif
 108 endif
 109
 110 # That's our default target when none is given on the command line
 111 PHONY := _all
 112 _all:
 113
 114 ifneq ($(KBUILD_OUTPUT),)
 115 # Invoke a second make in the output directory, passing relevant variables
 116 # check that the output directory actually exists
 117 saved-output := $(KBUILD_OUTPUT)
 118 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 119 $(if $(KBUILD_OUTPUT),, \
 120      $(error output directory "$(saved-output)" does not exist))
 121
 122 PHONY += $(MAKECMDGOALS)
 123
 124 $(filter-out _all,$(MAKECMDGOALS)) _all:
 125         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 126         KBUILD_SRC=$(CURDIR) \
 127         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
 128
 129 # Leave processing to above invocation of make
 130 skip-makefile := 1
 131 endif # ifneq ($(KBUILD_OUTPUT),)
 132 endif # ifeq ($(KBUILD_SRC),)
 133
 134 # We process the rest of the Makefile if this is the final invocation of make
 135 ifeq ($(skip-makefile),)
 136
 137 # If building an external module we do not care about the all: rule
 138 # but instead _all depend on modules
 139 PHONY += all
 140 ifeq ($(KBUILD_EXTMOD),)
 141 _all: all
 142 else
 143 _all: modules
 144 endif
 145
 146 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 147 TOPDIR          := $(srctree)
 148 # FIXME - TOPDIR is obsolete, use srctree/objtree
 149 objtree         := $(CURDIR)
 150 src             := $(srctree)
 151 obj             := $(objtree)
 152
 153 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 154
 155 export srctree objtree VPATH TOPDIR
 156
 157
 158 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 159 # first, and if a usermode build is happening, the "ARCH=um" on the command
 160 # line overrides the setting of ARCH below.  If a native build is happening,
 161 # then ARCH is assigned, getting whatever value it gets normally, and
 162 # SUBARCH is subsequently ignored.
 163
 164 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 165                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 166                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 167                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
 168
 169 SUBARCH := arm
 170
 171 # Cross compiling and selecting different set of gcc/bin-utils
 172 # ---------------------------------------------------------------------------
 173 #
 174 # When performing cross compilation for other architectures ARCH shall be set
 175 # to the target architecture. (See arch/* for the possibilities).
 176 # ARCH can be set during invocation of make:
 177 # make ARCH=ia64
 178 # Another way is to have ARCH set in the environment.
 179 # The default ARCH is the host where make is executed.
 180
 181 # CROSS_COMPILE specify the prefix used for all executables used
 182 # during compilation. Only gcc and related bin-utils executables
 183 # are prefixed with $(CROSS_COMPILE).
 184 # CROSS_COMPILE can be set on the command line
 185 # make CROSS_COMPILE=ia64-linux-
 186 # Alternatively CROSS_COMPILE can be set in the environment.
 187 # Default value for CROSS_COMPILE is not to prefix executables
 188 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 189
 190 ARCH            ?= $(SUBARCH)
 191 CROSS_COMPILE   ?= arm-linux-
 192
 193 # Architecture as present in compile.h
 194 UTS_MACHINE := $(ARCH)
 195
 196 KCONFIG_CONFIG  ?= .config
 197
 198 # SHELL used by kbuild
 199 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 200           else if [ -x /bin/bash ]; then echo /bin/bash; \
 201           else echo sh; fi ; fi)
 202
 203 HOSTCC       = gcc
 204 HOSTCXX      = g++
 205 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 206 HOSTCXXFLAGS = -O2
 207
 208 # Decide whether to build built-in, modular, or both.
 209 # Normally, just do built-in.
 210
 211 KBUILD_MODULES :=
 212 KBUILD_BUILTIN := 1
 213
 214 #       If we have only "make modules", don't compile built-in objects.
 215 #       When we're building modules with modversions, we need to consider
 216 #       the built-in objects during the descend as well, in order to
 217 #       make sure the checksums are up to date before we record them.
 218
 219 ifeq ($(MAKECMDGOALS),modules)
 220   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 221 endif
 222
 223 #       If we have "make <whatever> modules", compile modules
 224 #       in addition to whatever we do anyway.
 225 #       Just "make" or "make all" shall build modules as well
 226
 227 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 228   KBUILD_MODULES := 1
 229 endif
 230
 231 ifeq ($(MAKECMDGOALS),)
 232   KBUILD_MODULES := 1
 233 endif
 234
 235 export KBUILD_MODULES KBUILD_BUILTIN
 236 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 237
 238 # Beautify output
 239 # ---------------------------------------------------------------------------
 240 #
 241 # Normally, we echo the whole command before executing it. By making
 242 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 243 # $(quiet) to choose other forms of output instead, e.g.
 244 #
 245 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 246 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 247 #
 248 # If $(quiet) is empty, the whole command will be printed.
 249 # If it is set to "quiet_", only the short version will be printed.
 250 # If it is set to "silent_", nothing will be printed at all, since
 251 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 252 #
 253 # A simple variant is to prefix commands with $(Q) - that's useful
 254 # for commands that shall be hidden in non-verbose mode.
 255 #
 256 #       $(Q)ln $@ :<
 257 #
 258 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 259 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 260
 261 ifeq ($(KBUILD_VERBOSE),1)
 262   quiet =
 263   Q =
 264 else
 265   quiet=quiet_
 266   Q = @
 267 endif
 268
 269 # If the user is running make -s (silent mode), suppress echoing of
 270 # commands
 271
 272 ifneq ($(findstring s,$(MAKEFLAGS)),)
 273   quiet=silent_
 274 endif
 275
 276 export quiet Q KBUILD_VERBOSE
 277
 278
 279 # Look for make include files relative to root of kernel src
 280 MAKEFLAGS += --include-dir=$(srctree)
 281
 282 # We need some generic definitions.
 283 include $(srctree)/scripts/Kbuild.include
 284
 285 # Make variables (CC, etc...)
 286
 287 AS              = $(CROSS_COMPILE)as
 288 LD              = $(CROSS_COMPILE)ld
 289 CC              = $(CROSS_COMPILE)gcc
 290 CPP             = $(CC) -E
 291 AR              = $(CROSS_COMPILE)ar
 292 NM              = $(CROSS_COMPILE)nm
 293 STRIP           = $(CROSS_COMPILE)strip
 294 OBJCOPY         = $(CROSS_COMPILE)objcopy
 295 OBJDUMP         = $(CROSS_COMPILE)objdump
 296 AWK             = awk
 297 GENKSYMS        = scripts/genksyms/genksyms
 298 DEPMOD          = /sbin/depmod
 299 KALLSYMS        = scripts/kallsyms
 300 PERL            = perl
 301 CHECK           = sparse
 302
 303 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 304 MODFLAGS        = -DMODULE
 305 CFLAGS_MODULE   = $(MODFLAGS)
 306 AFLAGS_MODULE   = $(MODFLAGS)
 307 LDFLAGS_MODULE  =
 308 CFLAGS_KERNEL   =
 309 AFLAGS_KERNEL   =
 310
 311
 312 # Use LINUXINCLUDE when you must reference the include/ directory.
 313 # Needed to be compatible with the O= option
 314 LINUXINCLUDE    := -Iinclude \
 315                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 316                    -include include/linux/autoconf.h
 317
 318 CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)
 319
 320 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 321                    -fno-strict-aliasing -fno-common \
 322                    -Werror-implicit-function-declaration
 323 AFLAGS          := -D__ASSEMBLY__
 324
 325 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 326 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 327 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 328
 329 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 330 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 331 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 332 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 333
 334 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 335 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 336 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 337
 338 # When compiling out-of-tree modules, put MODVERDIR in the module
 339 # tree rather than in the kernel tree. The kernel tree might
 340 # even be read-only.
 341 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 342
 343 # Files to ignore in find ... statements
 344
 345 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
 346 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 347
 348 # ===========================================================================
 349 # Rules shared between *config targets and build targets
 350
 351 # Basic helpers built in scripts/
 352 PHONY += scripts_basic
 353 scripts_basic:
 354         $(Q)$(MAKE) $(build)=scripts/basic
 355
 356 # To avoid any implicit rule to kick in, define an empty command.
 357 scripts/basic/%: scripts_basic ;
 358
 359 PHONY += outputmakefile
 360 # outputmakefile generates a Makefile in the output directory, if using a
 361 # separate output directory. This allows convenient use of make in the
 362 # output directory.
 363 outputmakefile:
 364 ifneq ($(KBUILD_SRC),)
 365         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 366             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 367 endif
 368
 369 # To make sure we do not include .config for any of the *config targets
 370 # catch them early, and hand them over to scripts/kconfig/Makefile
 371 # It is allowed to specify more targets when calling make, including
 372 # mixing *config targets and build targets.
 373 # For example 'make oldconfig all'.
 374 # Detect when mixed targets is specified, and make a second invocation
 375 # of make so .config is not included in this case either (for *config).
 376
 377 no-dot-config-targets := clean mrproper distclean \
 378                          cscope TAGS tags help %docs check% \
 379                          include/linux/version.h headers_% \
 380                          kernelrelease kernelversion
 381
 382 config-targets := 0
 383 mixed-targets  := 0
 384 dot-config     := 1
 385
 386 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 387         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 388                 dot-config := 0
 389         endif
 390 endif
 391
 392 ifeq ($(KBUILD_EXTMOD),)
 393         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 394                 config-targets := 1
 395                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 396                         mixed-targets := 1
 397                 endif
 398         endif
 399 endif
 400
 401 ifeq ($(mixed-targets),1)
 402 # ===========================================================================
 403 # We're called with mixed targets (*config and build targets).
 404 # Handle them one by one.
 405
 406 %:: FORCE
 407         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 408
 409 else
 410 ifeq ($(config-targets),1)
 411 # ===========================================================================
 412 # *config targets only - make sure prerequisites are updated, and descend
 413 # in scripts/kconfig to make the *config target
 414
 415 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 416 # KBUILD_DEFCONFIG may point out an alternative default configuration
 417 # used for 'make defconfig'
 418 include $(srctree)/arch/$(ARCH)/Makefile
 419 export KBUILD_DEFCONFIG
 420
 421 config %config: scripts_basic outputmakefile FORCE
 422         $(Q)mkdir -p include/linux include/config
 423         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 424
 425 else
 426 # ===========================================================================
 427 # Build targets only - this includes vmlinux, arch specific targets, clean
 428 # targets and others. In general all targets except *config targets.
 429
 430 ifeq ($(KBUILD_EXTMOD),)
 431 # Additional helpers built in scripts/
 432 # Carefully list dependencies so we do not try to build scripts twice
 433 # in parallel
 434 PHONY += scripts
 435 scripts: scripts_basic include/config/auto.conf
 436         $(Q)$(MAKE) $(build)=$(@)
 437
 438 # Objects we will link into vmlinux / subdirs we need to visit
 439 init-y          := init/
 440 drivers-y       := drivers/ sound/
 441 net-y           := net/
 442 libs-y          := lib/
 443 core-y          := usr/
 444 endif # KBUILD_EXTMOD
 445
 446 ifeq ($(dot-config),1)
 447 # Read in config
 448 -include include/config/auto.conf
 449
 450 ifeq ($(KBUILD_EXTMOD),)
 451 # Read in dependencies to all Kconfig* files, make sure to run
 452 # oldconfig if changes are detected.
 453 -include include/config/auto.conf.cmd
 454
 455 # To avoid any implicit rule to kick in, define an empty command
 456 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 457
 458 # If .config is newer than include/config/auto.conf, someone tinkered
 459 # with it and forgot to run make oldconfig.
 460 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 461 # we execute the config step to be sure to catch updated Kconfig files
 462 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 463         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 464 else
 465 # external modules needs include/linux/autoconf.h and include/config/auto.conf
 466 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 467 PHONY += include/config/auto.conf
 468
 469 include/config/auto.conf:
 470         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 471         echo;                                                           \
 472         echo "  ERROR: Kernel configuration is invalid.";               \
 473         echo "         include/linux/autoconf.h or $@ are missing.";    \
 474         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 475         echo;                                                           \
 476         /bin/false)
 477
 478 endif # KBUILD_EXTMOD
 479
 480 else
 481 # Dummy target needed, because used as prerequisite
 482 include/config/auto.conf: ;
 483 endif # $(dot-config)
 484
 485 # The all: target is the default when no target is given on the
 486 # command line.
 487 # This allow a user to issue only 'make' to build a kernel including modules
 488 # Defaults vmlinux but it is usually overridden in the arch makefile
 489 all: vmlinux
 490
 491 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 492 CFLAGS          += -Os
 493 else
 494 CFLAGS          += -O2
 495 endif
 496
 497 include $(srctree)/arch/$(ARCH)/Makefile
 498
 499 ifdef CONFIG_FRAME_POINTER
 500 CFLAGS          += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 501 else
 502 CFLAGS          += -fomit-frame-pointer
 503 endif
 504
 505 ifdef CONFIG_DEBUG_INFO
 506 CFLAGS          += -g
 507 endif
 508
 509 # Force gcc to behave correct even for buggy distributions
 510 CFLAGS          += $(call cc-option, -fno-stack-protector)
 511
 512 # arch Makefile may override CC so keep this after arch Makefile is included
 513 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 514 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 515
 516 # warn about C99 declaration after statement
 517 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 518
 519 # disable pointer signed / unsigned warnings in gcc 4.0
 520 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 521
 522 # Use --build-id when available.
 523 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 524                               $(call ld-option, -Wl$(comma)--build-id,))
 525 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 526 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 527
 528 # Default kernel image to build when no specific target is given.
 529 # KBUILD_IMAGE may be overruled on the command line or
 530 # set in the environment
 531 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 532 # this default value
 533 export KBUILD_IMAGE ?= vmlinux
 534
 535 #
 536 # INSTALL_PATH specifies where to place the updated kernel and system map
 537 # images. Default is /boot, but you can set it to other values
 538 export  INSTALL_PATH ?= /boot
 539
 540 #
 541 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 542 # relocations required by build roots.  This is not defined in the
 543 # makefile but the argument can be passed to make if needed.
 544 #
 545
 546 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 547 export MODLIB
 548
 549 #
 550 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 551 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 552 #  the default option --strip-debug will be used.  Otherwise,
 553 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 554
 555 ifdef INSTALL_MOD_STRIP
 556 ifeq ($(INSTALL_MOD_STRIP),1)
 557 mod_strip_cmd = $(STRIP) --strip-debug
 558 else
 559 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 560 endif # INSTALL_MOD_STRIP=1
 561 else
 562 mod_strip_cmd = true
 563 endif # INSTALL_MOD_STRIP
 564 export mod_strip_cmd
 565
 566
 567 ifeq ($(KBUILD_EXTMOD),)
 568 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 569
 570 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 571                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 572                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 573
 574 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 575                      $(init-n) $(init-) \
 576                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 577                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 578
 579 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 580 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 581 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 582 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 583 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 584 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 585 libs-y          := $(libs-y1) $(libs-y2)
 586
 587 # Build vmlinux
 588 # ---------------------------------------------------------------------------
 589 # vmlinux is built from the objects selected by $(vmlinux-init) and
 590 # $(vmlinux-main). Most are built-in.o files from top-level directories
 591 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 592 # Ordering when linking is important, and $(vmlinux-init) must be first.
 593 #
 594 # vmlinux
 595 #   ^
 596 #   |
 597 #   +-< $(vmlinux-init)
 598 #   |   +--< init/version.o + more
 599 #   |
 600 #   +--< $(vmlinux-main)
 601 #   |    +--< driver/built-in.o mm/built-in.o + more
 602 #   |
 603 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 604 #
 605 # vmlinux version (uname -v) cannot be updated during normal
 606 # descending-into-subdirs phase since we do not yet know if we need to
 607 # update vmlinux.
 608 # Therefore this step is delayed until just before final link of vmlinux -
 609 # except in the kallsyms case where it is done just before adding the
 610 # symbols to the kernel.
 611 #
 612 # System.map is generated to document addresses of all kernel symbols
 613
 614 vmlinux-init := $(head-y) $(init-y)
 615 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 616 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 617 vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
 618 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 619
 620 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 621 # May be overridden by arch/$(ARCH)/Makefile
 622 quiet_cmd_vmlinux__ ?= LD      $@
 623       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 624       -T $(vmlinux-lds) $(vmlinux-init)                          \
 625       --start-group $(vmlinux-main) --end-group                  \
 626       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
 627
 628 # Generate new vmlinux version
 629 quiet_cmd_vmlinux_version = GEN     .version
 630       cmd_vmlinux_version = set -e;                     \
 631         if [ ! -r .version ]; then                      \
 632           rm -f .version;                               \
 633           echo 1 >.version;                             \
 634         else                                            \
 635           mv .version .old_version;                     \
 636           expr 0$$(cat .old_version) + 1 >.version;     \
 637         fi;                                             \
 638         $(MAKE) $(build)=init
 639
 640 # Generate System.map
 641 quiet_cmd_sysmap = SYSMAP
 642       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 643
 644 # Link of vmlinux
 645 # If CONFIG_KALLSYMS is set .version is already updated
 646 # Generate System.map and verify that the content is consistent
 647 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 648 # First command is ':' to allow us to use + in front of the rule
 649 define rule_vmlinux__
 650         :
 651         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 652
 653         $(call cmd,vmlinux__)
 654         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 655
 656         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 657           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 658         $(cmd_sysmap) $@ System.map;                                         \
 659         if [ $$? -ne 0 ]; then                                               \
 660                 rm -f $@;                                                    \
 661                 /bin/false;                                                  \
 662         fi;
 663         $(verify_kallsyms)
 664 endef
 665
 666
 667 ifdef CONFIG_KALLSYMS
 668 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 669 # It's a three stage process:
 670 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 671 #   empty
 672 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 673 #   the right size - vmlinux version (uname -v) is updated during this step
 674 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 675 #   but due to the added section, some addresses have shifted.
 676 #   From here, we generate a correct .tmp_kallsyms2.o
 677 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 678 # o Verify that the System.map from vmlinux matches the map from
 679 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 680 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 681 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 682 #   temporary bypass to allow the kernel to be built while the
 683 #   maintainers work out what went wrong with kallsyms.
 684
 685 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 686 last_kallsyms := 3
 687 else
 688 last_kallsyms := 2
 689 endif
 690
 691 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 692
 693 define verify_kallsyms
 694         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 695           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 696           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 697         $(Q)cmp -s System.map .tmp_System.map ||                             \
 698                 (echo Inconsistent kallsyms data;                            \
 699                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 700                  rm .tmp_kallsyms* ; /bin/false )
 701 endef
 702
 703 # Update vmlinux version before link
 704 # Use + in front of this rule to silent warning about make -j1
 705 # First command is ':' to allow us to use + in front of this rule
 706 cmd_ksym_ld = $(cmd_vmlinux__)
 707 define rule_ksym_ld
 708         :
 709         +$(call cmd,vmlinux_version)
 710         $(call cmd,vmlinux__)
 711         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 712 endef
 713
 714 # Generate .S file with all kernel symbols
 715 quiet_cmd_kallsyms = KSYM    $@
 716       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 717                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 718
 719 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 720         $(call if_changed_dep,as_o_S)
 721
 722 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 723         $(call cmd,kallsyms)
 724
 725 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 726 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 727         $(call if_changed_rule,ksym_ld)
 728
 729 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 730         $(call if_changed,vmlinux__)
 731
 732 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 733         $(call if_changed,vmlinux__)
 734
 735 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 736 $(KALLSYMS): scripts ;
 737
 738 # Generate some data for debugging strange kallsyms problems
 739 debug_kallsyms: .tmp_map$(last_kallsyms)
 740
 741 .tmp_map%: .tmp_vmlinux% FORCE
 742         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 743
 744 .tmp_map3: .tmp_map2
 745
 746 .tmp_map2: .tmp_map1
 747
 748 endif # ifdef CONFIG_KALLSYMS
 749
 750 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 751 # relevant sections renamed as per the linker script.
 752 quiet_cmd_vmlinux-modpost = LD      $@
 753       cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 754          $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
 755          $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
 756 define rule_vmlinux-modpost
 757         :
 758         +$(call cmd,vmlinux-modpost)
 759         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 760         $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
 761 endef
 762
 763 # vmlinux image - including updated kernel symbols
 764 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
 765 ifdef CONFIG_HEADERS_CHECK
 766         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 767 endif
 768         $(call vmlinux-modpost)
 769         $(call if_changed_rule,vmlinux__)
 770         $(Q)rm -f .old_version
 771
 772 vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 773         $(call if_changed_rule,vmlinux-modpost)
 774
 775 # The actual objects are generated when descending,
 776 # make sure no implicit rule kicks in
 777 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 778
 779 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 780 # Preset locale variables to speed up the build process. Limit locale
 781 # tweaks to this spot to avoid wrong language settings when running
 782 # make menuconfig etc.
 783 # Error messages still appears in the original language
 784
 785 PHONY += $(vmlinux-dirs)
 786 $(vmlinux-dirs): prepare scripts
 787         $(Q)$(MAKE) $(build)=$@
 788
 789 # Build the kernel release string
 790 #
 791 # The KERNELRELEASE value built here is stored in the file
 792 # include/config/kernel.release, and is used when executing several
 793 # make targets, such as "make install" or "make modules_install."
 794 #
 795 # The eventual kernel release string consists of the following fields,
 796 # shown in a hierarchical format to show how smaller parts are concatenated
 797 # to form the larger and final value, with values coming from places like
 798 # the Makefile, kernel config options, make command line options and/or
 799 # SCM tag information.
 800 #
 801 #       $(KERNELVERSION)
 802 #         $(VERSION)                    eg, 2
 803 #         $(PATCHLEVEL)                 eg, 6
 804 #         $(SUBLEVEL)                   eg, 18
 805 #         $(EXTRAVERSION)               eg, -rc6
 806 #       $(localver-full)
 807 #         $(localver)
 808 #           localversion*               (files without backups, containing '~')
 809 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 810 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 811 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 812 #           $(LOCALVERSION)             (from make command line if provided)
 813 #
 814 #  Note how the final $(localver-auto) string is included *only* if the
 815 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 816 # moment, only git is supported but other SCMs can edit the script
 817 # scripts/setlocalversion and add the appropriate checks as needed.
 818
 819 pattern = ".*/localversion[^~]*"
 820 string  = $(shell cat /dev/null \
 821            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 822
 823 localver = $(subst $(space),, $(string) \
 824                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 825
 826 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 827 # and if the SCM is know a tag from the SCM is appended.
 828 # The appended tag is determined by the SCM used.
 829 #
 830 # Currently, only git is supported.
 831 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 832 # checks as needed.
 833 ifdef CONFIG_LOCALVERSION_AUTO
 834         _localver-auto = $(shell $(CONFIG_SHELL) \
 835                           $(srctree)/scripts/setlocalversion $(srctree))
 836         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 837 endif
 838
 839 localver-full = $(localver)$(localver-auto)
 840
 841 # Store (new) KERNELRELASE string in include/config/kernel.release
 842 kernelrelease = $(KERNELVERSION)$(localver-full)
 843 include/config/kernel.release: include/config/auto.conf FORCE
 844         $(Q)rm -f $@
 845         $(Q)echo $(kernelrelease) > $@
 846
 847
 848 # Things we need to do before we recursively start building the kernel
 849 # or the modules are listed in "prepare".
 850 # A multi level approach is used. prepareN is processed before prepareN-1.
 851 # archprepare is used in arch Makefiles and when processed asm symlink,
 852 # version.h and scripts_basic is processed / created.
 853
 854 # Listed in dependency order
 855 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 856
 857 # prepare3 is used to check if we are building in a separate output directory,
 858 # and if so do:
 859 # 1) Check that make has not been executed in the kernel src $(srctree)
 860 # 2) Create the include2 directory, used for the second asm symlink
 861 prepare3: include/config/kernel.release
 862 ifneq ($(KBUILD_SRC),)
 863         @echo '  Using $(srctree) as source for kernel'
 864         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 865                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 866                 echo "  in the '$(srctree)' directory.";\
 867                 /bin/false; \
 868         fi;
 869         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 870         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 871 endif
 872
 873 # prepare2 creates a makefile if using a separate output directory
 874 prepare2: prepare3 outputmakefile
 875
 876 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 877                    include/asm include/config/auto.conf
 878 ifneq ($(KBUILD_MODULES),)
 879         $(Q)mkdir -p $(MODVERDIR)
 880         $(Q)rm -f $(MODVERDIR)/*
 881 endif
 882
 883 archprepare: prepare1 scripts_basic
 884
 885 prepare0: archprepare FORCE
 886         $(Q)$(MAKE) $(build)=.
 887         $(Q)$(MAKE) $(build)=. missing-syscalls
 888
 889 # All the preparing..
 890 prepare: prepare0
 891
 892 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 893 # done in arch/$(ARCH)/kernel/Makefile
 894
 895 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 896
 897 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 898 # hard to detect, but I suppose "make mrproper" is a good idea
 899 # before switching between archs anyway.
 900
 901 include/asm:
 902         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 903         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 904         @ln -fsn asm-$(ARCH) $@
 905
 906 # Generate some files
 907 # ---------------------------------------------------------------------------
 908
 909 # KERNELRELEASE can change from a few different places, meaning version.h
 910 # needs to be updated, so this check is forced on all builds
 911
 912 uts_len := 64
 913 define filechk_utsrelease.h
 914         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 915           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 916           exit 1;                                                         \
 917         fi;                                                               \
 918         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 919 endef
 920
 921 define filechk_version.h
 922         (echo \#define LINUX_VERSION_CODE $(shell                             \
 923         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 924         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 925 endef
 926
 927 include/linux/version.h: $(srctree)/Makefile FORCE
 928         $(call filechk,version.h)
 929
 930 include/linux/utsrelease.h: include/config/kernel.release FORCE
 931         $(call filechk,utsrelease.h)
 932
 933 # ---------------------------------------------------------------------------
 934
 935 PHONY += depend dep
 936 depend dep:
 937         @echo '*** Warning: make $@ is unnecessary now.'
 938
 939 # ---------------------------------------------------------------------------
 940 # Kernel headers
 941 INSTALL_HDR_PATH=$(objtree)/usr
 942 export INSTALL_HDR_PATH
 943
 944 HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
 945
 946 PHONY += headers_install_all
 947 headers_install_all: include/linux/version.h scripts_basic FORCE
 948         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 949         $(Q)for arch in $(HDRARCHES); do \
 950          $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
 951          done
 952
 953 PHONY += headers_install
 954 headers_install: include/linux/version.h scripts_basic FORCE
 955         @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
 956           echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
 957           exit 1 ; fi
 958         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 959         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
 960
 961 PHONY += headers_check_all
 962 headers_check_all: headers_install_all
 963         $(Q)for arch in $(HDRARCHES); do \
 964          $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
 965          done
 966
 967 PHONY += headers_check
 968 headers_check: headers_install
 969         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
 970
 971 # ---------------------------------------------------------------------------
 972 # Modules
 973
 974 ifdef CONFIG_MODULES
 975
 976 # By default, build modules as well
 977
 978 all: modules
 979
 980 #       Build modules
 981
 982 PHONY += modules
 983 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
 984         @echo '  Building modules, stage 2.';
 985         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 986
 987
 988 # Target to prepare building external modules
 989 PHONY += modules_prepare
 990 modules_prepare: prepare scripts
 991
 992 # Target to install modules
 993 PHONY += modules_install
 994 modules_install: _modinst_ _modinst_post
 995
 996 PHONY += _modinst_
 997 _modinst_:
 998         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 999                 echo "Warning: you may need to install module-init-tools"; \
1000                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1001                 sleep 1; \
1002         fi
1003         @rm -rf $(MODLIB)/kernel
1004         @rm -f $(MODLIB)/source
1005         @mkdir -p $(MODLIB)/kernel
1006         @ln -s $(srctree) $(MODLIB)/source
1007         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1008                 rm -f $(MODLIB)/build ; \
1009                 ln -s $(objtree) $(MODLIB)/build ; \
1010         fi
1011         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1012
1013 # If System.map exists, run depmod.  This deliberately does not have a
1014 # dependency on System.map since that would run the dependency tree on
1015 # vmlinux.  This depmod is only for convenience to give the initial
1016 # boot a modules.dep even before / is mounted read-write.  However the
1017 # boot script depmod is the master version.
1018 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
1019 depmod_opts     :=
1020 else
1021 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
1022 endif
1023 PHONY += _modinst_post
1024 _modinst_post: _modinst_
1025         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1026
1027 else # CONFIG_MODULES
1028
1029 # Modules not configured
1030 # ---------------------------------------------------------------------------
1031
1032 modules modules_install: FORCE
1033         @echo
1034         @echo "The present kernel configuration has modules disabled."
1035         @echo "Type 'make config' and enable loadable module support."
1036         @echo "Then build a kernel with module support enabled."
1037         @echo
1038         @exit 1
1039
1040 endif # CONFIG_MODULES
1041
1042 ###
1043 # Cleaning is done on three levels.
1044 # make clean     Delete most generated files
1045 #                Leave enough to build external modules
1046 # make mrproper  Delete the current configuration, and all generated files
1047 # make distclean Remove editor backup files, patch leftover files and the like
1048
1049 # Directories & files removed with 'make clean'
1050 CLEAN_DIRS  += $(MODVERDIR)
1051 CLEAN_FILES +=  vmlinux System.map \
1052                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1053
1054 # Directories & files removed with 'make mrproper'
1055 MRPROPER_DIRS  += include/config include2 usr/include
1056 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1057                   include/linux/autoconf.h include/linux/version.h      \
1058                   include/linux/utsrelease.h                            \
1059                   Module.symvers tags TAGS cscope*
1060
1061 # clean - Delete most, but leave enough to build external modules
1062 #
1063 clean: rm-dirs  := $(CLEAN_DIRS)
1064 clean: rm-files := $(CLEAN_FILES)
1065 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1066
1067 PHONY += $(clean-dirs) clean archclean
1068 $(clean-dirs):
1069         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1070
1071 clean: archclean $(clean-dirs)
1072         $(call cmd,rmdirs)
1073         $(call cmd,rmfiles)
1074         @find . $(RCS_FIND_IGNORE) \
1075                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1076                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1077                 -o -name '*.symtypes' \) \
1078                 -type f -print | xargs rm -f
1079
1080 # mrproper - Delete all generated files, including .config
1081 #
1082 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1083 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1084 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1085
1086 PHONY += $(mrproper-dirs) mrproper archmrproper
1087 $(mrproper-dirs):
1088         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1089
1090 mrproper: clean archmrproper $(mrproper-dirs)
1091         $(call cmd,rmdirs)
1092         $(call cmd,rmfiles)
1093
1094 # distclean
1095 #
1096 PHONY += distclean
1097
1098 distclean: mrproper
1099         @find $(srctree) $(RCS_FIND_IGNORE) \
1100                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1101                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1102                 -o -name '.*.rej' -o -size 0 \
1103                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1104                 -type f -print | xargs rm -f
1105
1106
1107 # Packaging of the kernel to various formats
1108 # ---------------------------------------------------------------------------
1109 # rpm target kept for backward compatibility
1110 package-dir     := $(srctree)/scripts/package
1111
1112 %pkg: include/config/kernel.release FORCE
1113         $(Q)$(MAKE) $(build)=$(package-dir) $@
1114 rpm: include/config/kernel.release FORCE
1115         $(Q)$(MAKE) $(build)=$(package-dir) $@
1116
1117
1118 # Brief documentation of the typical targets used
1119 # ---------------------------------------------------------------------------
1120
1121 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1122 boards := $(notdir $(boards))
1123
1124 help:
1125         @echo  'Cleaning targets:'
1126         @echo  '  clean           - Remove most generated files but keep the config and'
1127         @echo  '                    enough build support to build external modules'
1128         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1129         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1130         @echo  ''
1131         @echo  'Configuration targets:'
1132         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1133         @echo  ''
1134         @echo  'Other generic targets:'
1135         @echo  '  all             - Build all targets marked with [*]'
1136         @echo  '* vmlinux         - Build the bare kernel'
1137         @echo  '* modules         - Build all modules'
1138         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1139         @echo  '  dir/            - Build all files in dir and below'
1140         @echo  '  dir/file.[ois]  - Build specified target only'
1141         @echo  '  dir/file.ko     - Build module including final link'
1142         @echo  '  rpm             - Build a kernel as an RPM package'
1143         @echo  '  tags/TAGS       - Generate tags file for editors'
1144         @echo  '  cscope          - Generate cscope index'
1145         @echo  '  kernelrelease   - Output the release version string'
1146         @echo  '  kernelversion   - Output the version stored in Makefile'
1147         @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1148          echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1149          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1150          fi
1151         @echo  ''
1152         @echo  'Static analysers'
1153         @echo  '  checkstack      - Generate a list of stack hogs'
1154         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1155         @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1156          echo  '  headers_check   - Sanity check on exported headers'; \
1157          fi
1158         @echo  ''
1159         @echo  'Kernel packaging:'
1160         @$(MAKE) $(build)=$(package-dir) help
1161         @echo  ''
1162         @echo  'Documentation targets:'
1163         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1164         @echo  ''
1165         @echo  'Architecture specific targets ($(ARCH)):'
1166         @$(if $(archhelp),$(archhelp),\
1167                 echo '  No architecture specific help defined for $(ARCH)')
1168         @echo  ''
1169         @$(if $(boards), \
1170                 $(foreach b, $(boards), \
1171                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1172                 echo '')
1173
1174         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1175         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1176         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1177         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1178         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1179         @echo  ''
1180         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1181         @echo  'For further info see the ./README file'
1182
1183
1184 # Documentation targets
1185 # ---------------------------------------------------------------------------
1186 %docs: scripts_basic FORCE
1187         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1188
1189 else # KBUILD_EXTMOD
1190
1191 ###
1192 # External module support.
1193 # When building external modules the kernel used as basis is considered
1194 # read-only, and no consistency checks are made and the make
1195 # system is not used on the basis kernel. If updates are required
1196 # in the basis kernel ordinary make commands (without M=...) must
1197 # be used.
1198 #
1199 # The following are the only valid targets when building external
1200 # modules.
1201 # make M=dir clean     Delete all automatically generated files
1202 # make M=dir modules   Make all modules in specified dir
1203 # make M=dir           Same as 'make M=dir modules'
1204 # make M=dir modules_install
1205 #                      Install the modules built in the module directory
1206 #                      Assumes install directory is already created
1207
1208 # We are always building modules
1209 KBUILD_MODULES := 1
1210 PHONY += crmodverdir
1211 crmodverdir:
1212         $(Q)mkdir -p $(MODVERDIR)
1213         $(Q)rm -f $(MODVERDIR)/*
1214
1215 PHONY += $(objtree)/Module.symvers
1216 $(objtree)/Module.symvers:
1217         @test -e $(objtree)/Module.symvers || ( \
1218         echo; \
1219         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1220         echo "           is missing; modules will have no dependencies and modversions."; \
1221         echo )
1222
1223 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1224 PHONY += $(module-dirs) modules
1225 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1226         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1227
1228 modules: $(module-dirs)
1229         @echo '  Building modules, stage 2.';
1230         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1231
1232 PHONY += modules_install
1233 modules_install: _emodinst_ _emodinst_post
1234
1235 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1236 PHONY += _emodinst_
1237 _emodinst_:
1238         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1239         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1240
1241 # Run depmod only is we have System.map and depmod is executable
1242 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1243       cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1244                       $(DEPMOD) -ae -F System.map             \
1245                       $(if $(strip $(INSTALL_MOD_PATH)),      \
1246                       -b $(INSTALL_MOD_PATH) -r)              \
1247                       $(KERNELRELEASE);                       \
1248                    fi
1249
1250 PHONY += _emodinst_post
1251 _emodinst_post: _emodinst_
1252         $(call cmd,depmod)
1253
1254 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1255
1256 PHONY += $(clean-dirs) clean
1257 $(clean-dirs):
1258         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1259
1260 clean:  rm-dirs := $(MODVERDIR)
1261 clean: $(clean-dirs)
1262         $(call cmd,rmdirs)
1263         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1264                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1265                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1266                 -type f -print | xargs rm -f
1267
1268 help:
1269         @echo  '  Building external modules.'
1270         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1271         @echo  ''
1272         @echo  '  modules         - default target, build the module(s)'
1273         @echo  '  modules_install - install the module'
1274         @echo  '  clean           - remove generated files in module directory only'
1275         @echo  ''
1276
1277 # Dummies...
1278 PHONY += prepare scripts
1279 prepare: ;
1280 scripts: ;
1281 endif # KBUILD_EXTMOD
1282
1283 # Generate tags for editors
1284 # ---------------------------------------------------------------------------
1285
1286 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1287 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1288 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1289
1290 ifeq ($(src),$(obj))
1291 __srctree =
1292 else
1293 __srctree = $(srctree)/
1294 endif
1295
1296 ifeq ($(ALLSOURCE_ARCHS),)
1297 ifeq ($(ARCH),um)
1298 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1299 else
1300 ALLINCLUDE_ARCHS := $(ARCH)
1301 endif
1302 else
1303 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1304 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1305 endif
1306
1307 ALLSOURCE_ARCHS := $(ARCH)
1308
1309 define find-sources
1310         ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
1311                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1312                     -name $1 -print; \
1313           done ; \
1314           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1315                -name $1 -print; \
1316           find $(__srctree)include $(RCS_FIND_IGNORE) \
1317                \( -name config -o -name 'asm-*' \) -prune \
1318                -o -name $1 -print; \
1319           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1320                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1321                     -name $1 -print; \
1322           done ; \
1323           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1324                -name $1 -print; \
1325           find $(__srctree) $(RCS_FIND_IGNORE) \
1326                \( -name include -o -name arch \) -prune -o \
1327                -name $1 -print; \
1328           )
1329 endef
1330
1331 define all-sources
1332         $(call find-sources,'*.[chS]')
1333 endef
1334 define all-kconfigs
1335         $(call find-sources,'Kconfig*')
1336 endef
1337 define all-defconfigs
1338         $(call find-sources,'defconfig')
1339 endef
1340
1341 define xtags
1342         if $1 --version 2>&1 | grep -iq exuberant; then \
1343             $(all-sources) | xargs $1 -a \
1344                 -I __initdata,__exitdata,__acquires,__releases \
1345                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1346                 --extra=+f --c-kinds=+px \
1347                 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1348             $(all-kconfigs) | xargs $1 -a \
1349                 --langdef=kconfig \
1350                 --language-force=kconfig \
1351                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1352             $(all-defconfigs) | xargs -r $1 -a \
1353                 --langdef=dotconfig \
1354                 --language-force=dotconfig \
1355                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1356         elif $1 --version 2>&1 | grep -iq emacs; then \
1357             $(all-sources) | xargs $1 -a; \
1358             $(all-kconfigs) | xargs $1 -a \
1359                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1360             $(all-defconfigs) | xargs -r $1 -a \
1361                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1362         else \
1363             $(all-sources) | xargs $1 -a; \
1364         fi
1365 endef
1366
1367 quiet_cmd_cscope-file = FILELST cscope.files
1368       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1369
1370 quiet_cmd_cscope = MAKE    cscope.out
1371       cmd_cscope = cscope -b
1372
1373 cscope: FORCE
1374         $(call cmd,cscope-file)
1375         $(call cmd,cscope)
1376
1377 quiet_cmd_TAGS = MAKE   $@
1378 define cmd_TAGS
1379         rm -f $@; \
1380         $(call xtags,etags)
1381 endef
1382
1383 TAGS: FORCE
1384         $(call cmd,TAGS)
1385
1386 quiet_cmd_tags = MAKE   $@
1387 define cmd_tags
1388         rm -f $@; \
1389         $(call xtags,ctags)
1390 endef
1391
1392 tags: FORCE
1393         $(call cmd,tags)
1394
1395
1396 # Scripts to check various things for consistency
1397 # ---------------------------------------------------------------------------
1398
1399 includecheck:
1400         find * $(RCS_FIND_IGNORE) \
1401                 -name '*.[hcS]' -type f -print | sort \
1402                 | xargs $(PERL) -w scripts/checkincludes.pl
1403
1404 versioncheck:
1405         find * $(RCS_FIND_IGNORE) \
1406                 -name '*.[hcS]' -type f -print | sort \
1407                 | xargs $(PERL) -w scripts/checkversion.pl
1408
1409 namespacecheck:
1410         $(PERL) $(srctree)/scripts/namespace.pl
1411
1412 endif #ifeq ($(config-targets),1)
1413 endif #ifeq ($(mixed-targets),1)
1414
1415 PHONY += checkstack kernelrelease kernelversion
1416
1417 # UML needs a little special treatment here.  It wants to use the host
1418 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1419 # else wants $(ARCH), including people doing cross-builds, which means
1420 # that $(SUBARCH) doesn't work here.
1421 ifeq ($(ARCH), um)
1422 CHECKSTACK_ARCH := $(SUBARCH)
1423 else
1424 CHECKSTACK_ARCH := $(ARCH)
1425 endif
1426 checkstack:
1427         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1428         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1429
1430 kernelrelease:
1431         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1432         $(error kernelrelease not valid - run 'make prepare' to update it))
1433 kernelversion:
1434         @echo $(KERNELVERSION)
1435
1436 # Single targets
1437 # ---------------------------------------------------------------------------
1438 # Single targets are compatible with:
1439 # - build whith mixed source and output
1440 # - build with separate output dir 'make O=...'
1441 # - external modules
1442 #
1443 #  target-dir => where to store outputfile
1444 #  build-dir  => directory in kernel source tree to use
1445
1446 ifeq ($(KBUILD_EXTMOD),)
1447         build-dir  = $(patsubst %/,%,$(dir $@))
1448         target-dir = $(dir $@)
1449 else
1450         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1451         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1452         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1453 endif
1454
1455 %.s: %.c prepare scripts FORCE
1456         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1457 %.i: %.c prepare scripts FORCE
1458         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1459 %.o: %.c prepare scripts FORCE
1460         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1461 %.lst: %.c prepare scripts FORCE
1462         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1463 %.s: %.S prepare scripts FORCE
1464         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1465 %.o: %.S prepare scripts FORCE
1466         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1467 %.symtypes: %.c prepare scripts FORCE
1468         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1469
1470 # Modules
1471 / %/: prepare scripts FORCE
1472         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1473         $(build)=$(build-dir)
1474 %.ko: prepare scripts FORCE
1475         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1476         $(build)=$(build-dir) $(@:.ko=.o)
1477         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1478
1479 # FIXME Should go into a make.lib or something
1480 # ===========================================================================
1481
1482 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1483       cmd_rmdirs = rm -rf $(rm-dirs)
1484
1485 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1486       cmd_rmfiles = rm -f $(rm-files)
1487
1488
1489 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1490           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1491           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1492
1493 quiet_cmd_as_o_S = AS      $@
1494 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1495
1496 # read all saved command lines
1497
1498 targets := $(wildcard $(sort $(targets)))
1499 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1500
1501 ifneq ($(cmd_files),)
1502   $(cmd_files): ;       # Do not try to update included dependency files
1503   include $(cmd_files)
1504 endif
1505
1506 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1507 # Usage:
1508 # $(Q)$(MAKE) $(clean)=dir
1509 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1510
1511 endif   # skip-makefile
1512
1513 PHONY += FORCE
1514 FORCE:
1515
1516 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1517 Makefile: ;
1518
1519 # Declare the contents of the .PHONY variable as phony.  We keep that
1520 # information in a variable se we can use it in if_changed and friends.
1521 .PHONY: $(PHONY)