Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 16
   4 EXTRAVERSION =-rc1
   5 NAME=Sliding Snow Leopard
   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 print "Entering directory ..."
  14 MAKEFLAGS += --no-print-directory
  15
  16 # We are using a recursive build, so we need to do a little thinking
  17 # to get the ordering right.
  18 #
  19 # Most importantly: sub-Makefiles should only ever modify files in
  20 # their own directory. If in some directory we have a dependency on
  21 # a file in another dir (which doesn't happen often, but it's often
  22 # unavoidable when linking the built-in.o targets which finally
  23 # turn into vmlinux), we will call a sub make in that other dir, and
  24 # after that we are sure that everything which is in that other dir
  25 # is now up to date.
  26 #
  27 # The only cases where we need to modify files which have global
  28 # effects are thus separated out and done before the recursive
  29 # descending is started. They are now explicitly listed as the
  30 # prepare rule.
  31
  32 # To put more focus on warnings, be less verbose as default
  33 # Use 'make V=1' to see the full commands
  34
  35 ifdef V
  36   ifeq ("$(origin V)", "command line")
  37     KBUILD_VERBOSE = $(V)
  38   endif
  39 endif
  40 ifndef KBUILD_VERBOSE
  41   KBUILD_VERBOSE = 0
  42 endif
  43
  44 # Call sparse as part of compilation of C files
  45 # Use 'make C=1' to enable sparse checking
  46
  47 ifdef C
  48   ifeq ("$(origin C)", "command line")
  49     KBUILD_CHECKSRC = $(C)
  50   endif
  51 endif
  52 ifndef KBUILD_CHECKSRC
  53   KBUILD_CHECKSRC = 0
  54 endif
  55
  56 # Use make M=dir to specify directory of external module to build
  57 # Old syntax make ... SUBDIRS=$PWD is still supported
  58 # Setting the environment variable KBUILD_EXTMOD take precedence
  59 ifdef SUBDIRS
  60   KBUILD_EXTMOD ?= $(SUBDIRS)
  61 endif
  62 ifdef M
  63   ifeq ("$(origin M)", "command line")
  64     KBUILD_EXTMOD := $(M)
  65   endif
  66 endif
  67
  68
  69 # kbuild supports saving output files in a separate directory.
  70 # To locate output files in a separate directory two syntaxes are supported.
  71 # In both cases the working directory must be the root of the kernel src.
  72 # 1) O=
  73 # Use "make O=dir/to/store/output/files/"
  74 #
  75 # 2) Set KBUILD_OUTPUT
  76 # Set the environment variable KBUILD_OUTPUT to point to the directory
  77 # where the output files shall be placed.
  78 # export KBUILD_OUTPUT=dir/to/store/output/files/
  79 # make
  80 #
  81 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  82 # variable.
  83
  84
  85 # KBUILD_SRC is set on invocation of make in OBJ directory
  86 # KBUILD_SRC is not intended to be used by the regular user (for now)
  87 ifeq ($(KBUILD_SRC),)
  88
  89 # OK, Make called in directory where kernel src resides
  90 # Do we want to locate output files in a separate directory?
  91 ifdef O
  92   ifeq ("$(origin O)", "command line")
  93     KBUILD_OUTPUT := $(O)
  94   endif
  95 endif
  96
  97 # That's our default target when none is given on the command line
  98 .PHONY: _all
  99 _all:
 100
 101 ifneq ($(KBUILD_OUTPUT),)
 102 # Invoke a second make in the output directory, passing relevant variables
 103 # check that the output directory actually exists
 104 saved-output := $(KBUILD_OUTPUT)
 105 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 106 $(if $(KBUILD_OUTPUT),, \
 107      $(error output directory "$(saved-output)" does not exist))
 108
 109 .PHONY: $(MAKECMDGOALS) cdbuilddir
 110 $(MAKECMDGOALS) _all: cdbuilddir
 111
 112 cdbuilddir:
 113         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 114         KBUILD_SRC=$(CURDIR) \
 115         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $(MAKECMDGOALS)
 116
 117 # Leave processing to above invocation of make
 118 skip-makefile := 1
 119 endif # ifneq ($(KBUILD_OUTPUT),)
 120 endif # ifeq ($(KBUILD_SRC),)
 121
 122 # We process the rest of the Makefile if this is the final invocation of make
 123 ifeq ($(skip-makefile),)
 124
 125 # If building an external module we do not care about the all: rule
 126 # but instead _all depend on modules
 127 .PHONY: all
 128 ifeq ($(KBUILD_EXTMOD),)
 129 _all: all
 130 else
 131 _all: modules
 132 endif
 133
 134 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 135 TOPDIR          := $(srctree)
 136 # FIXME - TOPDIR is obsolete, use srctree/objtree
 137 objtree         := $(CURDIR)
 138 src             := $(srctree)
 139 obj             := $(objtree)
 140
 141 VPATH           := $(srctree)
 142
 143 export srctree objtree VPATH TOPDIR
 144
 145
 146 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 147 # first, and if a usermode build is happening, the "ARCH=um" on the command
 148 # line overrides the setting of ARCH below.  If a native build is happening,
 149 # then ARCH is assigned, getting whatever value it gets normally, and
 150 # SUBARCH is subsequently ignored.
 151
 152 SUBARCH := mips
 153
 154 # Cross compiling and selecting different set of gcc/bin-utils
 155 # ---------------------------------------------------------------------------
 156 #
 157 # When performing cross compilation for other architectures ARCH shall be set
 158 # to the target architecture. (See arch/* for the possibilities).
 159 # ARCH can be set during invocation of make:
 160 # make ARCH=ia64
 161 # Another way is to have ARCH set in the environment.
 162 # The default ARCH is the host where make is executed.
 163
 164 # CROSS_COMPILE specify the prefix used for all executables used
 165 # during compilation. Only gcc and related bin-utils executables
 166 # are prefixed with $(CROSS_COMPILE).
 167 # CROSS_COMPILE can be set on the command line
 168 # make CROSS_COMPILE=ia64-linux-
 169 # Alternatively CROSS_COMPILE can be set in the environment.
 170 # Default value for CROSS_COMPILE is not to prefix executables
 171 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 172
 173 ARCH            ?= $(SUBARCH)
 174 CROSS_COMPILE   ?=
 175
 176 # Architecture as present in compile.h
 177 UTS_MACHINE := $(ARCH)
 178
 179 # SHELL used by kbuild
 180 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 181           else if [ -x /bin/bash ]; then echo /bin/bash; \
 182           else echo sh; fi ; fi)
 183
 184 HOSTCC          = gcc
 185 HOSTCXX         = g++
 186 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 187 HOSTCXXFLAGS    = -O2
 188
 189 #       Decide whether to build built-in, modular, or both.
 190 #       Normally, just do built-in.
 191
 192 KBUILD_MODULES :=
 193 KBUILD_BUILTIN := 1
 194
 195 #       If we have only "make modules", don't compile built-in objects.
 196 #       When we're building modules with modversions, we need to consider
 197 #       the built-in objects during the descend as well, in order to
 198 #       make sure the checksums are uptodate before we record them.
 199
 200 ifeq ($(MAKECMDGOALS),modules)
 201   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 202 endif
 203
 204 #       If we have "make <whatever> modules", compile modules
 205 #       in addition to whatever we do anyway.
 206 #       Just "make" or "make all" shall build modules as well
 207
 208 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 209   KBUILD_MODULES := 1
 210 endif
 211
 212 ifeq ($(MAKECMDGOALS),)
 213   KBUILD_MODULES := 1
 214 endif
 215
 216 export KBUILD_MODULES KBUILD_BUILTIN
 217 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 218
 219 # Beautify output
 220 # ---------------------------------------------------------------------------
 221 #
 222 # Normally, we echo the whole command before executing it. By making
 223 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 224 # $(quiet) to choose other forms of output instead, e.g.
 225 #
 226 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 227 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 228 #
 229 # If $(quiet) is empty, the whole command will be printed.
 230 # If it is set to "quiet_", only the short version will be printed.
 231 # If it is set to "silent_", nothing wil be printed at all, since
 232 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 233 #
 234 # A simple variant is to prefix commands with $(Q) - that's useful
 235 # for commands that shall be hidden in non-verbose mode.
 236 #
 237 #       $(Q)ln $@ :<
 238 #
 239 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 240 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 241
 242 ifeq ($(KBUILD_VERBOSE),1)
 243   quiet =
 244   Q =
 245 else
 246   quiet=quiet_
 247   Q = @
 248 endif
 249
 250 # If the user is running make -s (silent mode), suppress echoing of
 251 # commands
 252
 253 ifneq ($(findstring s,$(MAKEFLAGS)),)
 254   quiet=silent_
 255 endif
 256
 257 export quiet Q KBUILD_VERBOSE
 258
 259 ######
 260 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
 261 # See documentation in Documentation/kbuild/makefiles.txt
 262
 263 # as-option
 264 # Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
 265
 266 as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
 267              -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
 268              else echo "$(2)"; fi ;)
 269
 270 # cc-option
 271 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
 272
 273 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 274              > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
 275
 276 # cc-option-yn
 277 # Usage: flag := $(call cc-option-yn, -march=winchip-c6)
 278 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 279                 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
 280
 281 # cc-option-align
 282 # Prefix align with either -falign or -malign
 283 cc-option-align = $(subst -functions=0,,\
 284         $(call cc-option,-falign-functions=0,-malign-functions=0))
 285
 286 # cc-version
 287 # Usage gcc-ver := $(call cc-version $(CC))
 288 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
 289               $(if $(1), $(1), $(CC)))
 290
 291
 292 # Look for make include files relative to root of kernel src
 293 MAKEFLAGS += --include-dir=$(srctree)
 294
 295 # We need some generic definitions
 296 include  $(srctree)/scripts/Kbuild.include
 297
 298 # For maximum performance (+ possibly random breakage, uncomment
 299 # the following)
 300
 301 #MAKEFLAGS += -rR
 302
 303 # Make variables (CC, etc...)
 304
 305 AS              = $(CROSS_COMPILE)as
 306 LD              = $(CROSS_COMPILE)ld
 307 CC              = $(CROSS_COMPILE)gcc
 308 CPP             = $(CC) -E
 309 AR              = $(CROSS_COMPILE)ar
 310 NM              = $(CROSS_COMPILE)nm
 311 STRIP           = $(CROSS_COMPILE)strip
 312 OBJCOPY         = $(CROSS_COMPILE)objcopy
 313 OBJDUMP         = $(CROSS_COMPILE)objdump
 314 AWK             = awk
 315 GENKSYMS        = scripts/genksyms/genksyms
 316 DEPMOD          = /sbin/depmod
 317 KALLSYMS        = scripts/kallsyms
 318 PERL            = perl
 319 CHECK           = sparse
 320
 321 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 322 MODFLAGS        = -DMODULE
 323 CFLAGS_MODULE   = $(MODFLAGS)
 324 AFLAGS_MODULE   = $(MODFLAGS)
 325 LDFLAGS_MODULE  = -r
 326 CFLAGS_KERNEL   =
 327 AFLAGS_KERNEL   =
 328
 329
 330 # Use LINUXINCLUDE when you must reference the include/ directory.
 331 # Needed to be compatible with the O= option
 332 LINUXINCLUDE    := -Iinclude \
 333                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 334                    -include include/linux/autoconf.h
 335
 336 CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)
 337
 338 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 339                    -fno-strict-aliasing -fno-common \
 340                    -ffreestanding
 341 AFLAGS          := -D__ASSEMBLY__
 342
 343 # Read KERNELRELEASE from .kernelrelease (if it exists)
 344 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
 345 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 346
 347 export  VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
 348         ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 349         CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 350         HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 351
 352 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 353 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 354 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 355
 356 # When compiling out-of-tree modules, put MODVERDIR in the module
 357 # tree rather than in the kernel tree. The kernel tree might
 358 # even be read-only.
 359 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 360
 361 # Files to ignore in find ... statements
 362
 363 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
 364 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 365
 366 # ===========================================================================
 367 # Rules shared between *config targets and build targets
 368
 369 # Basic helpers built in scripts/
 370 .PHONY: scripts_basic
 371 scripts_basic:
 372         $(Q)$(MAKE) $(build)=scripts/basic
 373
 374 # To avoid any implicit rule to kick in, define an empty command.
 375 scripts/basic/%: scripts_basic ;
 376
 377 .PHONY: outputmakefile
 378 # outputmakefile generate a Makefile to be placed in output directory, if
 379 # using a seperate output directory. This allows convinient use
 380 # of make in output directory
 381 outputmakefile:
 382         $(Q)if test ! $(srctree) -ef $(objtree); then \
 383         $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile              \
 384             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)         \
 385             > $(objtree)/Makefile;                                 \
 386             echo '  GEN    $(objtree)/Makefile';                   \
 387         fi
 388
 389 # To make sure we do not include .config for any of the *config targets
 390 # catch them early, and hand them over to scripts/kconfig/Makefile
 391 # It is allowed to specify more targets when calling make, including
 392 # mixing *config targets and build targets.
 393 # For example 'make oldconfig all'.
 394 # Detect when mixed targets is specified, and make a second invocation
 395 # of make so .config is not included in this case either (for *config).
 396
 397 no-dot-config-targets := clean mrproper distclean \
 398                          cscope TAGS tags help %docs check%
 399
 400 config-targets := 0
 401 mixed-targets  := 0
 402 dot-config     := 1
 403
 404 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 405         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 406                 dot-config := 0
 407         endif
 408 endif
 409
 410 ifeq ($(KBUILD_EXTMOD),)
 411         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 412                 config-targets := 1
 413                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 414                         mixed-targets := 1
 415                 endif
 416         endif
 417 endif
 418
 419 ifeq ($(mixed-targets),1)
 420 # ===========================================================================
 421 # We're called with mixed targets (*config and build targets).
 422 # Handle them one by one.
 423
 424 %:: FORCE
 425         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 426
 427 else
 428 ifeq ($(config-targets),1)
 429 # ===========================================================================
 430 # *config targets only - make sure prerequisites are updated, and descend
 431 # in scripts/kconfig to make the *config target
 432
 433 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 434 # KBUILD_DEFCONFIG may point out an alternative default configuration
 435 # used for 'make defconfig'
 436 include $(srctree)/arch/$(ARCH)/Makefile
 437 export KBUILD_DEFCONFIG
 438
 439 config %config: scripts_basic outputmakefile FORCE
 440         $(Q)mkdir -p include/linux
 441         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 442         $(Q)$(MAKE) .kernelrelease
 443
 444 else
 445 # ===========================================================================
 446 # Build targets only - this includes vmlinux, arch specific targets, clean
 447 # targets and others. In general all targets except *config targets.
 448
 449 ifeq ($(KBUILD_EXTMOD),)
 450 # Additional helpers built in scripts/
 451 # Carefully list dependencies so we do not try to build scripts twice
 452 # in parrallel
 453 .PHONY: scripts
 454 scripts: scripts_basic include/config/MARKER
 455         $(Q)$(MAKE) $(build)=$(@)
 456
 457 scripts_basic: include/linux/autoconf.h
 458
 459 # Objects we will link into vmlinux / subdirs we need to visit
 460 init-y          := init/
 461 drivers-y       := drivers/ sound/
 462 net-y           := net/
 463 libs-y          := lib/
 464 core-y          := usr/
 465 endif # KBUILD_EXTMOD
 466
 467 ifeq ($(dot-config),1)
 468 # In this section, we need .config
 469
 470 # Read in dependencies to all Kconfig* files, make sure to run
 471 # oldconfig if changes are detected.
 472 -include .kconfig.d
 473
 474 include .config
 475
 476 # If .config needs to be updated, it will be done via the dependency
 477 # that autoconf has on .config.
 478 # To avoid any implicit rule to kick in, define an empty command
 479 .config .kconfig.d: ;
 480
 481 # If .config is newer than include/linux/autoconf.h, someone tinkered
 482 # with it and forgot to run make oldconfig.
 483 # If kconfig.d is missing then we are probarly in a cleaned tree so
 484 # we execute the config step to be sure to catch updated Kconfig files
 485 include/linux/autoconf.h: .kconfig.d .config
 486         $(Q)mkdir -p include/linux
 487         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 488 else
 489 # Dummy target needed, because used as prerequisite
 490 include/linux/autoconf.h: ;
 491 endif
 492
 493 # The all: target is the default when no target is given on the
 494 # command line.
 495 # This allow a user to issue only 'make' to build a kernel including modules
 496 # Defaults vmlinux but it is usually overriden in the arch makefile
 497 all: vmlinux
 498
 499 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 500 CFLAGS          += -Os
 501 else
 502 CFLAGS          += -O2
 503 endif
 504
 505 #Add align options if CONFIG_CC_* is not equal to 0
 506 add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
 507 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
 508 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
 509 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
 510 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
 511
 512 ifdef CONFIG_FRAME_POINTER
 513 CFLAGS          += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
 514 else
 515 CFLAGS          += -fomit-frame-pointer
 516 endif
 517
 518 ifdef CONFIG_DEBUG_INFO
 519 CFLAGS          += -g
 520 endif
 521
 522 include $(srctree)/arch/$(ARCH)/Makefile
 523
 524 # arch Makefile may override CC so keep this after arch Makefile is included
 525 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 526 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 527
 528 # warn about C99 declaration after statement
 529 #CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 530
 531 # disable pointer signedness warnings in gcc 4.0
 532 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 533
 534 # Default kernel image to build when no specific target is given.
 535 # KBUILD_IMAGE may be overruled on the commandline or
 536 # set in the environment
 537 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 538 # this default value
 539 export KBUILD_IMAGE ?= vmlinux
 540
 541 #
 542 # INSTALL_PATH specifies where to place the updated kernel and system map
 543 # images. Default is /boot, but you can set it to other values
 544 export  INSTALL_PATH ?= /boot
 545
 546 #
 547 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 548 # relocations required by build roots.  This is not defined in the
 549 # makefile but the arguement can be passed to make if needed.
 550 #
 551
 552 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 553 export MODLIB
 554
 555
 556 ifeq ($(KBUILD_EXTMOD),)
 557 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 558
 559 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 560                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 561                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 562
 563 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 564                      $(init-n) $(init-) \
 565                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 566                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 567
 568 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 569 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 570 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 571 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 572 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 573 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 574 libs-y          := $(libs-y1) $(libs-y2)
 575
 576 # Build vmlinux
 577 # ---------------------------------------------------------------------------
 578 # vmlinux is build from the objects selected by $(vmlinux-init) and
 579 # $(vmlinux-main). Most are built-in.o files from top-level directories
 580 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 581 # Ordering when linking is important, and $(vmlinux-init) must be first.
 582 #
 583 # vmlinux
 584 #   ^
 585 #   |
 586 #   +-< $(vmlinux-init)
 587 #   |   +--< init/version.o + more
 588 #   |
 589 #   +--< $(vmlinux-main)
 590 #   |    +--< driver/built-in.o mm/built-in.o + more
 591 #   |
 592 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 593 #
 594 # vmlinux version (uname -v) cannot be updated during normal
 595 # descending-into-subdirs phase since we do not yet know if we need to
 596 # update vmlinux.
 597 # Therefore this step is delayed until just before final link of vmlinux -
 598 # except in the kallsyms case where it is done just before adding the
 599 # symbols to the kernel.
 600 #
 601 # System.map is generated to document addresses of all kernel symbols
 602
 603 vmlinux-init := $(head-y) $(init-y)
 604 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 605 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 606 vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
 607
 608 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 609 # May be overridden by arch/$(ARCH)/Makefile
 610 quiet_cmd_vmlinux__ ?= LD      $@
 611       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 612       -T $(vmlinux-lds) $(vmlinux-init)                          \
 613       --start-group $(vmlinux-main) --end-group                  \
 614       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 615
 616 # Generate new vmlinux version
 617 quiet_cmd_vmlinux_version = GEN     .version
 618       cmd_vmlinux_version = set -e;                     \
 619         if [ ! -r .version ]; then                      \
 620           rm -f .version;                               \
 621           echo 1 >.version;                             \
 622         else                                            \
 623           mv .version .old_version;                     \
 624           expr 0$$(cat .old_version) + 1 >.version;     \
 625         fi;                                             \
 626         $(MAKE) $(build)=init
 627
 628 # Generate System.map
 629 quiet_cmd_sysmap = SYSMAP
 630       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 631
 632 # Link of vmlinux
 633 # If CONFIG_KALLSYMS is set .version is already updated
 634 # Generate System.map and verify that the content is consistent
 635 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 636 # First command is ':' to allow us to use + in front of the rule
 637 define rule_vmlinux__
 638         :
 639         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 640
 641         $(call cmd,vmlinux__)
 642         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 643
 644         $(Q)$(if $($(quiet)cmd_sysmap),                 \
 645           echo '  $($(quiet)cmd_sysmap) System.map' &&) \
 646         $(cmd_sysmap) $@ System.map;                    \
 647         if [ $$? -ne 0 ]; then                          \
 648                 rm -f $@;                               \
 649                 /bin/false;                             \
 650         fi;
 651         $(verify_kallsyms)
 652 endef
 653
 654
 655 ifdef CONFIG_KALLSYMS
 656 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 657 # It's a three stage process:
 658 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 659 #   empty
 660 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 661 #   the right size - vmlinux version (uname -v) is updated during this step
 662 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 663 #   but due to the added section, some addresses have shifted.
 664 #   From here, we generate a correct .tmp_kallsyms2.o
 665 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 666 # o Verify that the System.map from vmlinux matches the map from
 667 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 668 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 669 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 670 #   temporary bypass to allow the kernel to be built while the
 671 #   maintainers work out what went wrong with kallsyms.
 672
 673 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 674 last_kallsyms := 3
 675 else
 676 last_kallsyms := 2
 677 endif
 678
 679 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 680
 681 define verify_kallsyms
 682         $(Q)$(if $($(quiet)cmd_sysmap),                       \
 683           echo '  $($(quiet)cmd_sysmap) .tmp_System.map' &&)  \
 684           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 685         $(Q)cmp -s System.map .tmp_System.map ||              \
 686                 (echo Inconsistent kallsyms data;             \
 687                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
 688                  rm .tmp_kallsyms* ; /bin/false )
 689 endef
 690
 691 # Update vmlinux version before link
 692 # Use + in front of this rule to silent warning about make -j1
 693 # First command is ':' to allow us to use + in front of this rule
 694 cmd_ksym_ld = $(cmd_vmlinux__)
 695 define rule_ksym_ld
 696         :
 697         +$(call cmd,vmlinux_version)
 698         $(call cmd,vmlinux__)
 699         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 700 endef
 701
 702 # Generate .S file with all kernel symbols
 703 quiet_cmd_kallsyms = KSYM    $@
 704       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 705                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 706
 707 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 708         $(call if_changed_dep,as_o_S)
 709
 710 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 711         $(call cmd,kallsyms)
 712
 713 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 714 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 715         $(call if_changed_rule,ksym_ld)
 716
 717 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 718         $(call if_changed,vmlinux__)
 719
 720 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 721         $(call if_changed,vmlinux__)
 722
 723 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 724 $(KALLSYMS): scripts ;
 725
 726 # Generate some data for debugging strange kallsyms problems
 727 debug_kallsyms: .tmp_map$(last_kallsyms)
 728
 729 .tmp_map%: .tmp_vmlinux% FORCE
 730         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 731
 732 .tmp_map3: .tmp_map2
 733
 734 .tmp_map2: .tmp_map1
 735
 736 endif # ifdef CONFIG_KALLSYMS
 737
 738 # vmlinux image - including updated kernel symbols
 739 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 740         $(call if_changed_rule,vmlinux__)
 741         $(Q)rm -f .old_version
 742
 743 # The actual objects are generated when descending,
 744 # make sure no implicit rule kicks in
 745 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 746
 747 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 748 # Preset locale variables to speed up the build process. Limit locale
 749 # tweaks to this spot to avoid wrong language settings when running
 750 # make menuconfig etc.
 751 # Error messages still appears in the original language
 752
 753 .PHONY: $(vmlinux-dirs)
 754 $(vmlinux-dirs): prepare scripts
 755         $(Q)$(MAKE) $(build)=$@
 756
 757 # Build the kernel release string
 758 # The KERNELRELEASE is stored in a file named .kernelrelease
 759 # to be used when executing for example make install or make modules_install
 760 #
 761 # Take the contents of any files called localversion* and the config
 762 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
 763 # LOCALVERSION from the command line override all of this
 764
 765 nullstring :=
 766 space      := $(nullstring) # end of line
 767
 768 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 769 __localver  = $(sort $(wildcard $(___localver)))
 770 # skip backup files (containing '~')
 771 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 772
 773 localver = $(subst $(space),, \
 774            $(shell cat /dev/null $(_localver)) \
 775            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 776
 777 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 778 # and if the SCM is know a tag from the SCM is appended.
 779 # The appended tag is determinded by the SCM used.
 780 #
 781 # Currently, only git is supported.
 782 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 783 # checks as needed.
 784 ifdef CONFIG_LOCALVERSION_AUTO
 785         _localver-auto = $(shell $(CONFIG_SHELL) \
 786                           $(srctree)/scripts/setlocalversion $(srctree))
 787         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 788 endif
 789
 790 localver-full = $(localver)$(localver-auto)
 791
 792 # Store (new) KERNELRELASE string in .kernelrelease
 793 kernelrelease = $(KERNELVERSION)$(localver-full)
 794 .kernelrelease: FORCE
 795         $(Q)rm -f $@
 796         $(Q)echo $(kernelrelease) > $@
 797
 798
 799 # Things we need to do before we recursively start building the kernel
 800 # or the modules are listed in "prepare".
 801 # A multi level approach is used. prepareN is processed before prepareN-1.
 802 # archprepare is used in arch Makefiles and when processed asm symlink,
 803 # version.h and scripts_basic is processed / created.
 804
 805 # Listed in dependency order
 806 .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
 807
 808 # prepare-all is deprecated, use prepare as valid replacement
 809 .PHONY: prepare-all
 810
 811 # prepare3 is used to check if we are building in a separate output directory,
 812 # and if so do:
 813 # 1) Check that make has not been executed in the kernel src $(srctree)
 814 # 2) Create the include2 directory, used for the second asm symlink
 815 prepare3: .kernelrelease
 816 ifneq ($(KBUILD_SRC),)
 817         @echo '  Using $(srctree) as source for kernel'
 818         $(Q)if [ -f $(srctree)/.config ]; then \
 819                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 820                 echo "  in the '$(srctree)' directory.";\
 821                 /bin/false; \
 822         fi;
 823         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 824         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 825 endif
 826
 827 # prepare2 creates a makefile if using a separate output directory
 828 prepare2: prepare3 outputmakefile
 829
 830 prepare1: prepare2 include/linux/version.h include/asm \
 831                    include/config/MARKER
 832 ifneq ($(KBUILD_MODULES),)
 833         $(Q)rm -rf $(MODVERDIR)
 834         $(Q)mkdir -p $(MODVERDIR)
 835 endif
 836
 837 archprepare: prepare1 scripts_basic
 838
 839 prepare0: archprepare FORCE
 840         $(Q)$(MAKE) $(build)=.
 841
 842 # All the preparing..
 843 prepare prepare-all: prepare0
 844
 845 #       Leave this as default for preprocessing vmlinux.lds.S, which is now
 846 #       done in arch/$(ARCH)/kernel/Makefile
 847
 848 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 849
 850 # Single targets
 851 # ---------------------------------------------------------------------------
 852
 853 %.s: %.c scripts FORCE
 854         $(Q)$(MAKE) $(build)=$(@D) $@
 855 %.i: %.c scripts FORCE
 856         $(Q)$(MAKE) $(build)=$(@D) $@
 857 %.o: %.c scripts FORCE
 858         $(Q)$(MAKE) $(build)=$(@D) $@
 859 %.ko: scripts FORCE
 860         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
 861         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 862 %/:      scripts prepare FORCE
 863         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
 864 %.lst: %.c scripts FORCE
 865         $(Q)$(MAKE) $(build)=$(@D) $@
 866 %.s: %.S scripts FORCE
 867         $(Q)$(MAKE) $(build)=$(@D) $@
 868 %.o: %.S scripts FORCE
 869         $(Q)$(MAKE) $(build)=$(@D) $@
 870
 871 #       FIXME: The asm symlink changes when $(ARCH) changes. That's
 872 #       hard to detect, but I suppose "make mrproper" is a good idea
 873 #       before switching between archs anyway.
 874
 875 include/asm:
 876         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 877         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 878         @ln -fsn asm-$(ARCH) $@
 879
 880 #       Split autoconf.h into include/linux/config/*
 881
 882 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
 883         @echo '  SPLIT   include/linux/autoconf.h -> include/config/*'
 884         @scripts/basic/split-include include/linux/autoconf.h include/config
 885         @touch $@
 886
 887 # Generate some files
 888 # ---------------------------------------------------------------------------
 889
 890 # KERNELRELEASE can change from a few different places, meaning version.h
 891 # needs to be updated, so this check is forced on all builds
 892
 893 uts_len := 64
 894
 895 define filechk_version.h
 896         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 897           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 898           exit 1; \
 899         fi; \
 900         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
 901           echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
 902          echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
 903         )
 904 endef
 905
 906 include/linux/version.h: $(srctree)/Makefile .config FORCE
 907         $(call filechk,version.h)
 908
 909 # ---------------------------------------------------------------------------
 910
 911 .PHONY: depend dep
 912 depend dep:
 913         @echo '*** Warning: make $@ is unnecessary now.'
 914
 915 # ---------------------------------------------------------------------------
 916 # Modules
 917
 918 ifdef CONFIG_MODULES
 919
 920 #       By default, build modules as well
 921
 922 all: modules
 923
 924 #       Build modules
 925
 926 .PHONY: modules
 927 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
 928         @echo '  Building modules, stage 2.';
 929         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 930
 931
 932 # Target to prepare building external modules
 933 .PHONY: modules_prepare
 934 modules_prepare: prepare scripts
 935
 936 # Target to install modules
 937 .PHONY: modules_install
 938 modules_install: _modinst_ _modinst_post
 939
 940 .PHONY: _modinst_
 941 _modinst_:
 942         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 943                 echo "Warning: you may need to install module-init-tools"; \
 944                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 945                 sleep 1; \
 946         fi
 947         @rm -rf $(MODLIB)/kernel
 948         @rm -f $(MODLIB)/source
 949         @mkdir -p $(MODLIB)/kernel
 950         @ln -s $(srctree) $(MODLIB)/source
 951         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 952                 rm -f $(MODLIB)/build ; \
 953                 ln -s $(objtree) $(MODLIB)/build ; \
 954         fi
 955         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
 956
 957 # If System.map exists, run depmod.  This deliberately does not have a
 958 # dependency on System.map since that would run the dependency tree on
 959 # vmlinux.  This depmod is only for convenience to give the initial
 960 # boot a modules.dep even before / is mounted read-write.  However the
 961 # boot script depmod is the master version.
 962 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 963 depmod_opts     :=
 964 else
 965 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 966 endif
 967 .PHONY: _modinst_post
 968 _modinst_post: _modinst_
 969         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 970
 971 else # CONFIG_MODULES
 972
 973 # Modules not configured
 974 # ---------------------------------------------------------------------------
 975
 976 modules modules_install: FORCE
 977         @echo
 978         @echo "The present kernel configuration has modules disabled."
 979         @echo "Type 'make config' and enable loadable module support."
 980         @echo "Then build a kernel with module support enabled."
 981         @echo
 982         @exit 1
 983
 984 endif # CONFIG_MODULES
 985
 986 ###
 987 # Cleaning is done on three levels.
 988 # make clean     Delete most generated files
 989 #                Leave enough to build external modules
 990 # make mrproper  Delete the current configuration, and all generated files
 991 # make distclean Remove editor backup files, patch leftover files and the like
 992
 993 # Directories & files removed with 'make clean'
 994 CLEAN_DIRS  += $(MODVERDIR)
 995 CLEAN_FILES +=  vmlinux System.map \
 996                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
 997
 998 # Directories & files removed with 'make mrproper'
 999 MRPROPER_DIRS  += include/config include2
1000 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1001                   include/linux/autoconf.h include/linux/version.h \
1002                   .kernelrelease Module.symvers tags TAGS cscope*
1003
1004 # clean - Delete most, but leave enough to build external modules
1005 #
1006 clean: rm-dirs  := $(CLEAN_DIRS)
1007 clean: rm-files := $(CLEAN_FILES)
1008 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1009
1010 .PHONY: $(clean-dirs) clean archclean
1011 $(clean-dirs):
1012         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1013
1014 clean: archclean $(clean-dirs)
1015         $(call cmd,rmdirs)
1016         $(call cmd,rmfiles)
1017         @find . $(RCS_FIND_IGNORE) \
1018                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1019                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1020                 -type f -print | xargs rm -f
1021
1022 # mrproper - Delete all generated files, including .config
1023 #
1024 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1025 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1026 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1027
1028 .PHONY: $(mrproper-dirs) mrproper archmrproper
1029 $(mrproper-dirs):
1030         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1031
1032 mrproper: clean archmrproper $(mrproper-dirs)
1033         $(call cmd,rmdirs)
1034         $(call cmd,rmfiles)
1035
1036 # distclean
1037 #
1038 .PHONY: distclean
1039
1040 distclean: mrproper
1041         @find $(srctree) $(RCS_FIND_IGNORE) \
1042                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1043                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1044                 -o -name '.*.rej' -o -size 0 \
1045                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1046                 -type f -print | xargs rm -f
1047
1048
1049 # Packaging of the kernel to various formats
1050 # ---------------------------------------------------------------------------
1051 # rpm target kept for backward compatibility
1052 package-dir     := $(srctree)/scripts/package
1053
1054 .PHONY: %-pkg rpm
1055
1056 %pkg: FORCE
1057         $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1058 rpm: FORCE
1059         $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1060
1061
1062 # Brief documentation of the typical targets used
1063 # ---------------------------------------------------------------------------
1064
1065 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1066 boards := $(notdir $(boards))
1067
1068 help:
1069         @echo  'Cleaning targets:'
1070         @echo  '  clean           - remove most generated files but keep the config'
1071         @echo  '  mrproper        - remove all generated files + config + various backup files'
1072         @echo  ''
1073         @echo  'Configuration targets:'
1074         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1075         @echo  ''
1076         @echo  'Other generic targets:'
1077         @echo  '  all             - Build all targets marked with [*]'
1078         @echo  '* vmlinux         - Build the bare kernel'
1079         @echo  '* modules         - Build all modules'
1080         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1081         @echo  '  dir/            - Build all files in dir and below'
1082         @echo  '  dir/file.[ois]  - Build specified target only'
1083         @echo  '  dir/file.ko     - Build module including final link'
1084         @echo  '  rpm             - Build a kernel as an RPM package'
1085         @echo  '  tags/TAGS       - Generate tags file for editors'
1086         @echo  '  cscope          - Generate cscope index'
1087         @echo  '  kernelrelease   - Output the release version string'
1088         @echo  '  kernelversion   - Output the version stored in Makefile'
1089         @echo  ''
1090         @echo  'Static analysers'
1091         @echo  '  buildcheck      - List dangling references to vmlinux discarded sections'
1092         @echo  '                    and init sections from non-init sections'
1093         @echo  '  checkstack      - Generate a list of stack hogs'
1094         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1095         @echo  ''
1096         @echo  'Kernel packaging:'
1097         @$(MAKE) -f $(package-dir)/Makefile help
1098         @echo  ''
1099         @echo  'Documentation targets:'
1100         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1101         @echo  ''
1102         @echo  'Architecture specific targets ($(ARCH)):'
1103         @$(if $(archhelp),$(archhelp),\
1104                 echo '  No architecture specific help defined for $(ARCH)')
1105         @echo  ''
1106         @$(if $(boards), \
1107                 $(foreach b, $(boards), \
1108                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1109                 echo '')
1110
1111         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1112         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1113         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse)'
1114         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK (sparse)'
1115         @echo  ''
1116         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1117         @echo  'For further info see the ./README file'
1118
1119
1120 # Documentation targets
1121 # ---------------------------------------------------------------------------
1122 %docs: scripts_basic FORCE
1123         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1124
1125 else # KBUILD_EXTMOD
1126
1127 ###
1128 # External module support.
1129 # When building external modules the kernel used as basis is considered
1130 # read-only, and no consistency checks are made and the make
1131 # system is not used on the basis kernel. If updates are required
1132 # in the basis kernel ordinary make commands (without M=...) must
1133 # be used.
1134 #
1135 # The following are the only valid targets when building external
1136 # modules.
1137 # make M=dir clean     Delete all automatically generated files
1138 # make M=dir modules   Make all modules in specified dir
1139 # make M=dir           Same as 'make M=dir modules'
1140 # make M=dir modules_install
1141 #                      Install the modules build in the module directory
1142 #                      Assumes install directory is already created
1143
1144 # We are always building modules
1145 KBUILD_MODULES := 1
1146 .PHONY: crmodverdir
1147 crmodverdir:
1148         $(Q)mkdir -p $(MODVERDIR)
1149
1150 .PHONY: $(objtree)/Module.symvers
1151 $(objtree)/Module.symvers:
1152         @test -e $(objtree)/Module.symvers || ( \
1153         echo; \
1154         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1155         echo "           is missing; modules will have no dependencies and modversions."; \
1156         echo )
1157
1158 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1159 .PHONY: $(module-dirs) modules
1160 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1161         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1162
1163 modules: $(module-dirs)
1164         @echo '  Building modules, stage 2.';
1165         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1166
1167 .PHONY: modules_install
1168 modules_install:
1169         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1170
1171 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1172
1173 .PHONY: $(clean-dirs) clean
1174 $(clean-dirs):
1175         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1176
1177 clean:  rm-dirs := $(MODVERDIR)
1178 clean: $(clean-dirs)
1179         $(call cmd,rmdirs)
1180         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1181                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1182                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1183                 -type f -print | xargs rm -f
1184
1185 help:
1186         @echo  '  Building external modules.'
1187         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1188         @echo  ''
1189         @echo  '  modules         - default target, build the module(s)'
1190         @echo  '  modules_install - install the module'
1191         @echo  '  clean           - remove generated files in module directory only'
1192         @echo  ''
1193 endif # KBUILD_EXTMOD
1194
1195 # Generate tags for editors
1196 # ---------------------------------------------------------------------------
1197
1198 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1199 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1200 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1201
1202 ifeq ($(src),$(obj))
1203 __srctree =
1204 else
1205 __srctree = $(srctree)/
1206 endif
1207
1208 ifeq ($(ALLSOURCE_ARCHS),)
1209 ifeq ($(ARCH),um)
1210 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1211 else
1212 ALLINCLUDE_ARCHS := $(ARCH)
1213 endif
1214 else
1215 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1216 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1217 endif
1218
1219 ALLSOURCE_ARCHS := $(ARCH)
1220
1221 define all-sources
1222         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1223                \( -name include -o -name arch \) -prune -o \
1224                -name '*.[chS]' -print; \
1225           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1226                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1227                     -name '*.[chS]' -print; \
1228           done ; \
1229           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1230                -name '*.[chS]' -print; \
1231           find $(__srctree)include $(RCS_FIND_IGNORE) \
1232                \( -name config -o -name 'asm-*' \) -prune \
1233                -o -name '*.[chS]' -print; \
1234           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1235                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1236                     -name '*.[chS]' -print; \
1237           done ; \
1238           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1239                -name '*.[chS]' -print )
1240 endef
1241
1242 quiet_cmd_cscope-file = FILELST cscope.files
1243       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1244
1245 quiet_cmd_cscope = MAKE    cscope.out
1246       cmd_cscope = cscope -b
1247
1248 cscope: FORCE
1249         $(call cmd,cscope-file)
1250         $(call cmd,cscope)
1251
1252 quiet_cmd_TAGS = MAKE   $@
1253 define cmd_TAGS
1254         rm -f $@; \
1255         ETAGSF=`etags --version | grep -i exuberant >/dev/null &&     \
1256                 echo "-I __initdata,__exitdata,__acquires,__releases  \
1257                       -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1258                       --extra=+f --c-kinds=+px"`;                     \
1259                 $(all-sources) | xargs etags $$ETAGSF -a
1260 endef
1261
1262 TAGS: FORCE
1263         $(call cmd,TAGS)
1264
1265
1266 quiet_cmd_tags = MAKE   $@
1267 define cmd_tags
1268         rm -f $@; \
1269         CTAGSF=`ctags --version | grep -i exuberant >/dev/null &&     \
1270                 echo "-I __initdata,__exitdata,__acquires,__releases  \
1271                       -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1272                       --extra=+f --c-kinds=+px"`;                     \
1273                 $(all-sources) | xargs ctags $$CTAGSF -a
1274 endef
1275
1276 tags: FORCE
1277         $(call cmd,tags)
1278
1279
1280 # Scripts to check various things for consistency
1281 # ---------------------------------------------------------------------------
1282
1283 includecheck:
1284         find * $(RCS_FIND_IGNORE) \
1285                 -name '*.[hcS]' -type f -print | sort \
1286                 | xargs $(PERL) -w scripts/checkincludes.pl
1287
1288 versioncheck:
1289         find * $(RCS_FIND_IGNORE) \
1290                 -name '*.[hcS]' -type f -print | sort \
1291                 | xargs $(PERL) -w scripts/checkversion.pl
1292
1293 buildcheck:
1294         $(PERL) $(srctree)/scripts/reference_discarded.pl
1295         $(PERL) $(srctree)/scripts/reference_init.pl
1296
1297 namespacecheck:
1298         $(PERL) $(srctree)/scripts/namespace.pl
1299
1300 endif #ifeq ($(config-targets),1)
1301 endif #ifeq ($(mixed-targets),1)
1302
1303 .PHONY: checkstack
1304 checkstack:
1305         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1306         $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1307
1308 kernelrelease:
1309         $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1310         $(error kernelrelease not valid - run 'make *config' to update it))
1311 kernelversion:
1312         @echo $(KERNELVERSION)
1313
1314 # FIXME Should go into a make.lib or something
1315 # ===========================================================================
1316
1317 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1318       cmd_rmdirs = rm -rf $(rm-dirs)
1319
1320 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1321       cmd_rmfiles = rm -f $(rm-files)
1322
1323
1324 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1325           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1326           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1327
1328 quiet_cmd_as_o_S = AS      $@
1329 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1330
1331 # read all saved command lines
1332
1333 targets := $(wildcard $(sort $(targets)))
1334 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1335
1336 ifneq ($(cmd_files),)
1337   $(cmd_files): ;       # Do not try to update included dependency files
1338   include $(cmd_files)
1339 endif
1340
1341 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1342 # Usage:
1343 # $(Q)$(MAKE) $(clean)=dir
1344 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1345
1346 endif   # skip-makefile
1347
1348 FORCE: