Makefile

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