Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 20
   4 EXTRAVERSION =-rc2
   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) $(PATCHLEVEL)
 361 endif
 362
 363 # To make sure we do not include .config for any of the *config targets
 364 # catch them early, and hand them over to scripts/kconfig/Makefile
 365 # It is allowed to specify more targets when calling make, including
 366 # mixing *config targets and build targets.
 367 # For example 'make oldconfig all'.
 368 # Detect when mixed targets is specified, and make a second invocation
 369 # of make so .config is not included in this case either (for *config).
 370
 371 PHONY += generated_headers
 372
 373 generated_headers: include/linux/version.h include/linux/compile.h \
 374                 include/linux/utsrelease.h
 375
 376 no-dot-config-targets := generated_headers clean mrproper distclean \
 377                          cscope TAGS tags help %docs check% \
 378                          headers_% kernelrelease kernelversion
 379
 380 config-targets := 0
 381 mixed-targets  := 0
 382 dot-config     := 1
 383
 384 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 385         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 386                 dot-config := 0
 387         endif
 388 endif
 389
 390 ifeq ($(KBUILD_EXTMOD),)
 391         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 392                 config-targets := 1
 393                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 394                         mixed-targets := 1
 395                 endif
 396         endif
 397 endif
 398
 399 ifeq ($(mixed-targets),1)
 400 # ===========================================================================
 401 # We're called with mixed targets (*config and build targets).
 402 # Handle them one by one.
 403
 404 %:: FORCE
 405         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 406
 407 else
 408 ifeq ($(config-targets),1)
 409 # ===========================================================================
 410 # *config targets only - make sure prerequisites are updated, and descend
 411 # in scripts/kconfig to make the *config target
 412
 413 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 414 # KBUILD_DEFCONFIG may point out an alternative default configuration
 415 # used for 'make defconfig'
 416 include $(srctree)/arch/$(ARCH)/Makefile
 417 export KBUILD_DEFCONFIG
 418
 419 config %config: scripts_basic outputmakefile FORCE
 420         $(Q)mkdir -p include/linux include/config
 421         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 422
 423 else
 424 # ===========================================================================
 425 # Build targets only - this includes vmlinux, arch specific targets, clean
 426 # targets and others. In general all targets except *config targets.
 427
 428 ifeq ($(KBUILD_EXTMOD),)
 429 # Additional helpers built in scripts/
 430 # Carefully list dependencies so we do not try to build scripts twice
 431 # in parallel
 432 PHONY += scripts
 433 scripts: scripts_basic include/config/auto.conf
 434         $(Q)$(MAKE) $(build)=$(@)
 435
 436 # Objects we will link into vmlinux / subdirs we need to visit
 437 init-y          := init/
 438 drivers-y       := drivers/ sound/
 439 net-y           := net/
 440 libs-y          := lib/
 441 core-y          := usr/
 442 endif # KBUILD_EXTMOD
 443
 444 ifeq ($(dot-config),1)
 445 # Read in config
 446 -include include/config/auto.conf
 447
 448 ifeq ($(KBUILD_EXTMOD),)
 449 # Read in dependencies to all Kconfig* files, make sure to run
 450 # oldconfig if changes are detected.
 451 -include include/config/auto.conf.cmd
 452
 453 # To avoid any implicit rule to kick in, define an empty command
 454 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 455
 456 # If .config is newer than include/config/auto.conf, someone tinkered
 457 # with it and forgot to run make oldconfig.
 458 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 459 # we execute the config step to be sure to catch updated Kconfig files
 460 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 461         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 462 else
 463 # external modules needs include/linux/autoconf.h and include/config/auto.conf
 464 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 465 PHONY += include/config/auto.conf
 466
 467 include/config/auto.conf:
 468         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 469         echo;                                                           \
 470         echo "  ERROR: Kernel configuration is invalid.";               \
 471         echo "         include/linux/autoconf.h or $@ are missing.";    \
 472         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 473         echo;                                                           \
 474         /bin/false)
 475
 476 endif # KBUILD_EXTMOD
 477
 478 else
 479 # Dummy target needed, because used as prerequisite
 480 include/config/auto.conf: ;
 481 endif # $(dot-config)
 482
 483 # The all: target is the default when no target is given on the
 484 # command line.
 485 # This allow a user to issue only 'make' to build a kernel including modules
 486 # Defaults vmlinux but it is usually overridden in the arch makefile
 487 all: vmlinux
 488
 489 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 490 CFLAGS          += -Os
 491 else
 492 CFLAGS          += -O2
 493 endif
 494
 495 include $(srctree)/arch/$(ARCH)/Makefile
 496
 497 ifdef CONFIG_FRAME_POINTER
 498 CFLAGS          += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
 499 else
 500 CFLAGS          += -fomit-frame-pointer
 501 endif
 502
 503 ifdef CONFIG_DEBUG_INFO
 504 CFLAGS          += -g
 505 endif
 506
 507 # Force gcc to behave correct even for buggy distributions
 508 CFLAGS          += $(call cc-option, -fno-stack-protector)
 509
 510 # arch Makefile may override CC so keep this after arch Makefile is included
 511 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 512 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 513
 514 # warn about C99 declaration after statement
 515 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 516
 517 # disable pointer signed / unsigned warnings in gcc 4.0
 518 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 519
 520 # Default kernel image to build when no specific target is given.
 521 # KBUILD_IMAGE may be overruled on the command line or
 522 # set in the environment
 523 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 524 # this default value
 525 export KBUILD_IMAGE ?= vmlinux
 526
 527 #
 528 # INSTALL_PATH specifies where to place the updated kernel and system map
 529 # images. Default is /boot, but you can set it to other values
 530 export  INSTALL_PATH ?= /boot
 531
 532 #
 533 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 534 # relocations required by build roots.  This is not defined in the
 535 # makefile but the argument can be passed to make if needed.
 536 #
 537
 538 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 539 export MODLIB
 540
 541 #
 542 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 543 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 544 #  the default option --strip-debug will be used.  Otherwise,
 545 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 546
 547 ifdef INSTALL_MOD_STRIP
 548 ifeq ($(INSTALL_MOD_STRIP),1)
 549 mod_strip_cmd = $(STRIP) --strip-debug
 550 else
 551 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 552 endif # INSTALL_MOD_STRIP=1
 553 else
 554 mod_strip_cmd = true
 555 endif # INSTALL_MOD_STRIP
 556 export mod_strip_cmd
 557
 558
 559 ifeq ($(KBUILD_EXTMOD),)
 560 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 561
 562 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 563                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 564                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 565
 566 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 567                      $(init-n) $(init-) \
 568                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 569                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 570
 571 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 572 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 573 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 574 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 575 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 576 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 577 libs-y          := $(libs-y1) $(libs-y2)
 578
 579 # Build vmlinux
 580 # ---------------------------------------------------------------------------
 581 # vmlinux is built from the objects selected by $(vmlinux-init) and
 582 # $(vmlinux-main). Most are built-in.o files from top-level directories
 583 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 584 # Ordering when linking is important, and $(vmlinux-init) must be first.
 585 #
 586 # vmlinux
 587 #   ^
 588 #   |
 589 #   +-< $(vmlinux-init)
 590 #   |   +--< init/version.o + more
 591 #   |
 592 #   +--< $(vmlinux-main)
 593 #   |    +--< driver/built-in.o mm/built-in.o + more
 594 #   |
 595 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 596 #
 597 # vmlinux version (uname -v) cannot be updated during normal
 598 # descending-into-subdirs phase since we do not yet know if we need to
 599 # update vmlinux.
 600 # Therefore this step is delayed until just before final link of vmlinux -
 601 # except in the kallsyms case where it is done just before adding the
 602 # symbols to the kernel.
 603 #
 604 # System.map is generated to document addresses of all kernel symbols
 605
 606 vmlinux-init := $(head-y) $(init-y)
 607 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 608 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 609 vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
 610
 611 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 612 # May be overridden by arch/$(ARCH)/Makefile
 613 quiet_cmd_vmlinux__ ?= LD      $@
 614       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 615       -T $(vmlinux-lds) $(vmlinux-init)                          \
 616       --start-group $(vmlinux-main) --end-group                  \
 617       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 618
 619 # Generate new vmlinux version
 620 quiet_cmd_vmlinux_version = GEN     .version
 621       cmd_vmlinux_version = set -e;                     \
 622         if [ ! -r .version ]; then                      \
 623           rm -f .version;                               \
 624           echo 1 >.version;                             \
 625         else                                            \
 626           mv .version .old_version;                     \
 627           expr 0$$(cat .old_version) + 1 >.version;     \
 628         fi;                                             \
 629         $(MAKE) $(build)=init
 630
 631 # Generate System.map
 632 quiet_cmd_sysmap = SYSMAP
 633       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 634
 635 # Link of vmlinux
 636 # If CONFIG_KALLSYMS is set .version is already updated
 637 # Generate System.map and verify that the content is consistent
 638 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 639 # First command is ':' to allow us to use + in front of the rule
 640 define rule_vmlinux__
 641         :
 642         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 643
 644         $(call cmd,vmlinux__)
 645         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 646
 647         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 648           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 649         $(cmd_sysmap) $@ System.map;                                         \
 650         if [ $$? -ne 0 ]; then                                               \
 651                 rm -f $@;                                                    \
 652                 /bin/false;                                                  \
 653         fi;
 654         $(verify_kallsyms)
 655 endef
 656
 657
 658 ifdef CONFIG_KALLSYMS
 659 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 660 # It's a three stage process:
 661 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 662 #   empty
 663 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 664 #   the right size - vmlinux version (uname -v) is updated during this step
 665 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 666 #   but due to the added section, some addresses have shifted.
 667 #   From here, we generate a correct .tmp_kallsyms2.o
 668 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 669 # o Verify that the System.map from vmlinux matches the map from
 670 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 671 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 672 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 673 #   temporary bypass to allow the kernel to be built while the
 674 #   maintainers work out what went wrong with kallsyms.
 675
 676 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 677 last_kallsyms := 3
 678 else
 679 last_kallsyms := 2
 680 endif
 681
 682 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 683
 684 define verify_kallsyms
 685         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 686           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 687           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 688         $(Q)cmp -s System.map .tmp_System.map ||                             \
 689                 (echo Inconsistent kallsyms data;                            \
 690                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 691                  rm .tmp_kallsyms* ; /bin/false )
 692 endef
 693
 694 # Update vmlinux version before link
 695 # Use + in front of this rule to silent warning about make -j1
 696 # First command is ':' to allow us to use + in front of this rule
 697 cmd_ksym_ld = $(cmd_vmlinux__)
 698 define rule_ksym_ld
 699         :
 700         +$(call cmd,vmlinux_version)
 701         $(call cmd,vmlinux__)
 702         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 703 endef
 704
 705 # Generate .S file with all kernel symbols
 706 quiet_cmd_kallsyms = KSYM    $@
 707       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 708                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 709
 710 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 711         $(call if_changed_dep,as_o_S)
 712
 713 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 714         $(call cmd,kallsyms)
 715
 716 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 717 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 718         $(call if_changed_rule,ksym_ld)
 719
 720 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 721         $(call if_changed,vmlinux__)
 722
 723 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 724         $(call if_changed,vmlinux__)
 725
 726 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 727 $(KALLSYMS): scripts ;
 728
 729 # Generate some data for debugging strange kallsyms problems
 730 debug_kallsyms: .tmp_map$(last_kallsyms)
 731
 732 .tmp_map%: .tmp_vmlinux% FORCE
 733         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 734
 735 .tmp_map3: .tmp_map2
 736
 737 .tmp_map2: .tmp_map1
 738
 739 endif # ifdef CONFIG_KALLSYMS
 740
 741 # compile.h changes depending on hostname, generation number, etc,
 742 # so we regenerate it always.
 743 # mkcompile_h will make sure to only update the
 744 # actual file if its content has changed.
 745
 746 include/linux/compile.h: FORCE
 747         @echo '  CHK     $@'
 748         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \
 749         "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(CFLAGS)"
 750
 751 # vmlinux image - including updated kernel symbols
 752 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 753 ifdef CONFIG_HEADERS_CHECK
 754         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 755 endif
 756         $(call if_changed_rule,vmlinux__)
 757         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 758         $(Q)rm -f .old_version
 759
 760 # The actual objects are generated when descending,
 761 # make sure no implicit rule kicks in
 762 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 763
 764 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 765 # Preset locale variables to speed up the build process. Limit locale
 766 # tweaks to this spot to avoid wrong language settings when running
 767 # make menuconfig etc.
 768 # Error messages still appears in the original language
 769
 770 PHONY += $(vmlinux-dirs)
 771 $(vmlinux-dirs): prepare scripts
 772         $(Q)$(MAKE) $(build)=$@
 773
 774 # Build the kernel release string
 775 #
 776 # The KERNELRELEASE value built here is stored in the file
 777 # include/config/kernel.release, and is used when executing several
 778 # make targets, such as "make install" or "make modules_install."
 779 #
 780 # The eventual kernel release string consists of the following fields,
 781 # shown in a hierarchical format to show how smaller parts are concatenated
 782 # to form the larger and final value, with values coming from places like
 783 # the Makefile, kernel config options, make command line options and/or
 784 # SCM tag information.
 785 #
 786 #       $(KERNELVERSION)
 787 #         $(VERSION)                    eg, 2
 788 #         $(PATCHLEVEL)                 eg, 6
 789 #         $(SUBLEVEL)                   eg, 18
 790 #         $(EXTRAVERSION)               eg, -rc6
 791 #       $(localver-full)
 792 #         $(localver)
 793 #           localversion*               (all localversion* files)
 794 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 795 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 796 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 797 #           $(LOCALVERSION)             (from make command line if provided)
 798 #
 799 #  Note how the final $(localver-auto) string is included *only* if the
 800 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 801 # moment, only git is supported but other SCMs can edit the script
 802 # scripts/setlocalversion and add the appropriate checks as needed.
 803
 804 nullstring :=
 805 space      := $(nullstring) # end of line
 806
 807 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 808 __localver  = $(sort $(wildcard $(___localver)))
 809 # skip backup files (containing '~')
 810 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 811
 812 localver = $(subst $(space),, \
 813            $(shell cat /dev/null $(_localver)) \
 814            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 815
 816 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 817 # and if the SCM is know a tag from the SCM is appended.
 818 # The appended tag is determined by the SCM used.
 819 #
 820 # Currently, only git is supported.
 821 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 822 # checks as needed.
 823 ifdef CONFIG_LOCALVERSION_AUTO
 824         _localver-auto = $(shell $(CONFIG_SHELL) \
 825                           $(srctree)/scripts/setlocalversion $(srctree))
 826         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 827 endif
 828
 829 localver-full = $(localver)$(localver-auto)
 830
 831 # Store (new) KERNELRELASE string in include/config/kernel.release
 832 kernelrelease = $(KERNELVERSION)$(localver-full)
 833 include/config/kernel.release: include/config/auto.conf FORCE
 834         $(Q)rm -f $@
 835         $(Q)echo $(kernelrelease) > $@
 836
 837
 838 # Things we need to do before we recursively start building the kernel
 839 # or the modules are listed in "prepare".
 840 # A multi level approach is used. prepareN is processed before prepareN-1.
 841 # archprepare is used in arch Makefiles and when processed asm symlink,
 842 # version.h and scripts_basic is processed / created.
 843
 844 # Listed in dependency order
 845 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 846
 847 # prepare-all is deprecated, use prepare as valid replacement
 848 PHONY += prepare-all
 849
 850 # prepare3 is used to check if we are building in a separate output directory,
 851 # and if so do:
 852 # 1) Check that make has not been executed in the kernel src $(srctree)
 853 # 2) Create the include2 directory, used for the second asm symlink
 854 prepare3: include/config/kernel.release
 855 ifneq ($(KBUILD_SRC),)
 856         @echo '  Using $(srctree) as source for kernel'
 857         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 858                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 859                 echo "  in the '$(srctree)' directory.";\
 860                 /bin/false; \
 861         fi;
 862         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 863         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 864 endif
 865
 866 # prepare2 creates a makefile if using a separate output directory
 867 prepare2: prepare3 outputmakefile
 868
 869 prepare1: prepare2 generated_headers include/asm include/config/auto.conf
 870
 871 ifneq ($(KBUILD_MODULES),)
 872         $(Q)mkdir -p $(MODVERDIR)
 873         $(Q)rm -f $(MODVERDIR)/*
 874 endif
 875
 876 archprepare: prepare1 scripts_basic
 877
 878 prepare0: archprepare FORCE
 879         $(Q)$(MAKE) $(build)=.
 880
 881 # All the preparing..
 882 prepare prepare-all: prepare0
 883
 884 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 885 # done in arch/$(ARCH)/kernel/Makefile
 886
 887 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 888
 889 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 890 # hard to detect, but I suppose "make mrproper" is a good idea
 891 # before switching between archs anyway.
 892
 893 include/asm:
 894         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 895         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 896         @ln -fsn asm-$(ARCH) $@
 897
 898 # Generate some files
 899 # ---------------------------------------------------------------------------
 900
 901 # KERNELRELEASE can change from a few different places, meaning version.h
 902 # needs to be updated, so this check is forced on all builds
 903
 904 uts_len := 64
 905 define filechk_utsrelease.h
 906         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 907           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 908           exit 1;                                                         \
 909         fi;                                                               \
 910         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 911 endef
 912
 913 define filechk_version.h
 914         (echo \#define LINUX_VERSION_CODE $(shell                             \
 915         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 916         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 917 endef
 918
 919 include/linux/version.h: $(srctree)/Makefile FORCE
 920         $(call filechk,version.h)
 921
 922 include/linux/utsrelease.h: include/config/kernel.release FORCE
 923         $(call filechk,utsrelease.h)
 924
 925 # ---------------------------------------------------------------------------
 926
 927 PHONY += depend dep
 928 depend dep:
 929         @echo '*** Warning: make $@ is unnecessary now.'
 930
 931 # ---------------------------------------------------------------------------
 932 # Kernel headers
 933 INSTALL_HDR_PATH=$(objtree)/usr
 934 export INSTALL_HDR_PATH
 935
 936 HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
 937
 938 PHONY += headers_install_all
 939 headers_install_all: generated_headers scripts_basic FORCE
 940         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 941         $(Q)for arch in $(HDRARCHES); do \
 942          $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
 943          done
 944
 945 PHONY += headers_install
 946 headers_install: generated_headers scripts_basic FORCE
 947         @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
 948           echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
 949           exit 1 ; fi
 950         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 951         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
 952
 953 PHONY += headers_check
 954 headers_check: headers_install
 955         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
 956
 957 # ---------------------------------------------------------------------------
 958 # Modules
 959
 960 ifdef CONFIG_MODULES
 961
 962 # By default, build modules as well
 963
 964 all: modules
 965
 966 #       Build modules
 967
 968 PHONY += modules
 969 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
 970         @echo '  Building modules, stage 2.';
 971         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 972
 973
 974 # Target to prepare building external modules
 975 PHONY += modules_prepare
 976 modules_prepare: prepare scripts
 977
 978 # Target to install modules
 979 PHONY += modules_install
 980 modules_install: _modinst_ _modinst_post
 981
 982 PHONY += _modinst_
 983 _modinst_:
 984         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 985                 echo "Warning: you may need to install module-init-tools"; \
 986                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 987                 sleep 1; \
 988         fi
 989         @rm -rf $(MODLIB)/kernel
 990         @rm -f $(MODLIB)/source
 991         @mkdir -p $(MODLIB)/kernel
 992         @ln -s $(srctree) $(MODLIB)/source
 993         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 994                 rm -f $(MODLIB)/build ; \
 995                 ln -s $(objtree) $(MODLIB)/build ; \
 996         fi
 997         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 998
 999 # If System.map exists, run depmod.  This deliberately does not have a
1000 # dependency on System.map since that would run the dependency tree on
1001 # vmlinux.  This depmod is only for convenience to give the initial
1002 # boot a modules.dep even before / is mounted read-write.  However the
1003 # boot script depmod is the master version.
1004 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
1005 depmod_opts     :=
1006 else
1007 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
1008 endif
1009 PHONY += _modinst_post
1010 _modinst_post: _modinst_
1011         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1012
1013 else # CONFIG_MODULES
1014
1015 # Modules not configured
1016 # ---------------------------------------------------------------------------
1017
1018 modules modules_install: FORCE
1019         @echo
1020         @echo "The present kernel configuration has modules disabled."
1021         @echo "Type 'make config' and enable loadable module support."
1022         @echo "Then build a kernel with module support enabled."
1023         @echo
1024         @exit 1
1025
1026 endif # CONFIG_MODULES
1027
1028 ###
1029 # Cleaning is done on three levels.
1030 # make clean     Delete most generated files
1031 #                Leave enough to build external modules
1032 # make mrproper  Delete the current configuration, and all generated files
1033 # make distclean Remove editor backup files, patch leftover files and the like
1034
1035 # Directories & files removed with 'make clean'
1036 CLEAN_DIRS  += $(MODVERDIR)
1037 CLEAN_FILES +=  vmlinux System.map \
1038                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1039
1040 # Directories & files removed with 'make mrproper'
1041 MRPROPER_DIRS  += include/config include2 usr/include
1042 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1043                   include/linux/autoconf.h generated-headers            \
1044                   Module.symvers tags TAGS cscope*
1045
1046 # clean - Delete most, but leave enough to build external modules
1047 #
1048 clean: rm-dirs  := $(CLEAN_DIRS)
1049 clean: rm-files := $(CLEAN_FILES)
1050 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1051
1052 PHONY += $(clean-dirs) clean archclean
1053 $(clean-dirs):
1054         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1055
1056 clean: archclean $(clean-dirs)
1057         $(call cmd,rmdirs)
1058         $(call cmd,rmfiles)
1059         @find . $(RCS_FIND_IGNORE) \
1060                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1061                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1062                 -o -name '*.symtypes' \) \
1063                 -type f -print | xargs rm -f
1064
1065 # mrproper - Delete all generated files, including .config
1066 #
1067 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1068 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1069 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1070
1071 PHONY += $(mrproper-dirs) mrproper archmrproper
1072 $(mrproper-dirs):
1073         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1074
1075 mrproper: clean archmrproper $(mrproper-dirs)
1076         $(call cmd,rmdirs)
1077         $(call cmd,rmfiles)
1078
1079 # distclean
1080 #
1081 PHONY += distclean
1082
1083 distclean: mrproper
1084         @find $(srctree) $(RCS_FIND_IGNORE) \
1085                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1086                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1087                 -o -name '.*.rej' -o -size 0 \
1088                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1089                 -type f -print | xargs rm -f
1090
1091
1092 # Packaging of the kernel to various formats
1093 # ---------------------------------------------------------------------------
1094 # rpm target kept for backward compatibility
1095 package-dir     := $(srctree)/scripts/package
1096
1097 %pkg: include/config/kernel.release FORCE
1098         $(Q)$(MAKE) $(build)=$(package-dir) $@
1099 rpm: include/config/kernel.release FORCE
1100         $(Q)$(MAKE) $(build)=$(package-dir) $@
1101
1102
1103 # Brief documentation of the typical targets used
1104 # ---------------------------------------------------------------------------
1105
1106 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1107 boards := $(notdir $(boards))
1108
1109 help:
1110         @echo  'Cleaning targets:'
1111         @echo  '  clean           - Remove most generated files but keep the config and'
1112         @echo  '                    enough build support to build external modules'
1113         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1114         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1115         @echo  ''
1116         @echo  'Configuration targets:'
1117         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1118         @echo  ''
1119         @echo  'Other generic targets:'
1120         @echo  '  all             - Build all targets marked with [*]'
1121         @echo  '* vmlinux         - Build the bare kernel'
1122         @echo  '* modules         - Build all modules'
1123         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1124         @echo  '  dir/            - Build all files in dir and below'
1125         @echo  '  dir/file.[ois]  - Build specified target only'
1126         @echo  '  dir/file.ko     - Build module including final link'
1127         @echo  '  rpm             - Build a kernel as an RPM package'
1128         @echo  '  tags/TAGS       - Generate tags file for editors'
1129         @echo  '  cscope          - Generate cscope index'
1130         @echo  '  kernelrelease   - Output the release version string'
1131         @echo  '  kernelversion   - Output the version stored in Makefile'
1132         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1133          echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1134          fi
1135         @echo  '                    (default: $(INSTALL_HDR_PATH))'
1136         @echo  ''
1137         @echo  'Static analysers'
1138         @echo  '  checkstack      - Generate a list of stack hogs'
1139         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1140         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1141          echo  '  headers_check   - Sanity check on exported headers'; \
1142          fi
1143         @echo  ''
1144         @echo  'Kernel packaging:'
1145         @$(MAKE) $(build)=$(package-dir) help
1146         @echo  ''
1147         @echo  'Documentation targets:'
1148         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1149         @echo  ''
1150         @echo  'Architecture specific targets ($(ARCH)):'
1151         @$(if $(archhelp),$(archhelp),\
1152                 echo '  No architecture specific help defined for $(ARCH)')
1153         @echo  ''
1154         @$(if $(boards), \
1155                 $(foreach b, $(boards), \
1156                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1157                 echo '')
1158
1159         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1160         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1161         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1162         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1163         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1164         @echo  ''
1165         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1166         @echo  'For further info see the ./README file'
1167
1168
1169 # Documentation targets
1170 # ---------------------------------------------------------------------------
1171 %docs: scripts_basic FORCE
1172         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1173
1174 else # KBUILD_EXTMOD
1175
1176 ###
1177 # External module support.
1178 # When building external modules the kernel used as basis is considered
1179 # read-only, and no consistency checks are made and the make
1180 # system is not used on the basis kernel. If updates are required
1181 # in the basis kernel ordinary make commands (without M=...) must
1182 # be used.
1183 #
1184 # The following are the only valid targets when building external
1185 # modules.
1186 # make M=dir clean     Delete all automatically generated files
1187 # make M=dir modules   Make all modules in specified dir
1188 # make M=dir           Same as 'make M=dir modules'
1189 # make M=dir modules_install
1190 #                      Install the modules built in the module directory
1191 #                      Assumes install directory is already created
1192
1193 # We are always building modules
1194 KBUILD_MODULES := 1
1195 PHONY += crmodverdir
1196 crmodverdir:
1197         $(Q)mkdir -p $(MODVERDIR)
1198         $(Q)rm -f $(MODVERDIR)/*
1199
1200 PHONY += $(objtree)/Module.symvers
1201 $(objtree)/Module.symvers:
1202         @test -e $(objtree)/Module.symvers || ( \
1203         echo; \
1204         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1205         echo "           is missing; modules will have no dependencies and modversions."; \
1206         echo )
1207
1208 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1209 PHONY += $(module-dirs) modules
1210 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1211         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1212
1213 modules: $(module-dirs)
1214         @echo '  Building modules, stage 2.';
1215         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1216
1217 PHONY += modules_install
1218 modules_install: _emodinst_ _emodinst_post
1219
1220 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1221 PHONY += _emodinst_
1222 _emodinst_:
1223         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1224         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1225
1226 # Run depmod only is we have System.map and depmod is executable
1227 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1228       cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1229                       $(DEPMOD) -ae -F System.map             \
1230                       $(if $(strip $(INSTALL_MOD_PATH)),      \
1231                       -b $(INSTALL_MOD_PATH) -r)              \
1232                       $(KERNELRELEASE);                       \
1233                    fi
1234
1235 PHONY += _emodinst_post
1236 _emodinst_post: _emodinst_
1237         $(call cmd,depmod)
1238
1239 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1240
1241 PHONY += $(clean-dirs) clean
1242 $(clean-dirs):
1243         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1244
1245 clean:  rm-dirs := $(MODVERDIR)
1246 clean: $(clean-dirs)
1247         $(call cmd,rmdirs)
1248         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1249                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1250                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1251                 -type f -print | xargs rm -f
1252
1253 help:
1254         @echo  '  Building external modules.'
1255         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1256         @echo  ''
1257         @echo  '  modules         - default target, build the module(s)'
1258         @echo  '  modules_install - install the module'
1259         @echo  '  clean           - remove generated files in module directory only'
1260         @echo  ''
1261
1262 # Dummies...
1263 PHONY += prepare scripts
1264 prepare: ;
1265 scripts: ;
1266 endif # KBUILD_EXTMOD
1267
1268 # Generate tags for editors
1269 # ---------------------------------------------------------------------------
1270
1271 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1272 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1273 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1274
1275 ifeq ($(src),$(obj))
1276 __srctree =
1277 else
1278 __srctree = $(srctree)/
1279 endif
1280
1281 ifeq ($(ALLSOURCE_ARCHS),)
1282 ifeq ($(ARCH),um)
1283 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1284 else
1285 ALLINCLUDE_ARCHS := $(ARCH)
1286 endif
1287 else
1288 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1289 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1290 endif
1291
1292 ALLSOURCE_ARCHS := $(ARCH)
1293
1294 define find-sources
1295         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1296                \( -name include -o -name arch \) -prune -o \
1297                -name $1 -print; \
1298           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1299                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1300                     -name $1 -print; \
1301           done ; \
1302           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1303                -name $1 -print; \
1304           find $(__srctree)include $(RCS_FIND_IGNORE) \
1305                \( -name config -o -name 'asm-*' \) -prune \
1306                -o -name $1 -print; \
1307           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1308                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1309                     -name $1 -print; \
1310           done ; \
1311           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1312                -name $1 -print )
1313 endef
1314
1315 define all-sources
1316         $(call find-sources,'*.[chS]')
1317 endef
1318 define all-kconfigs
1319         $(call find-sources,'Kconfig*')
1320 endef
1321 define all-defconfigs
1322         $(call find-sources,'defconfig')
1323 endef
1324
1325 define xtags
1326         if $1 --version 2>&1 | grep -iq exuberant; then \
1327             $(all-sources) | xargs $1 -a \
1328                 -I __initdata,__exitdata,__acquires,__releases \
1329                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1330                 --extra=+f --c-kinds=+px \
1331                 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1332             $(all-kconfigs) | xargs $1 -a \
1333                 --langdef=kconfig \
1334                 --language-force=kconfig \
1335                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1336             $(all-defconfigs) | xargs -r $1 -a \
1337                 --langdef=dotconfig \
1338                 --language-force=dotconfig \
1339                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1340         elif $1 --version 2>&1 | grep -iq emacs; then \
1341             $(all-sources) | xargs $1 -a; \
1342             $(all-kconfigs) | xargs $1 -a \
1343                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1344             $(all-defconfigs) | xargs -r $1 -a \
1345                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1346         else \
1347             $(all-sources) | xargs $1 -a; \
1348         fi
1349 endef
1350
1351 quiet_cmd_cscope-file = FILELST cscope.files
1352       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1353
1354 quiet_cmd_cscope = MAKE    cscope.out
1355       cmd_cscope = cscope -b
1356
1357 cscope: FORCE
1358         $(call cmd,cscope-file)
1359         $(call cmd,cscope)
1360
1361 quiet_cmd_TAGS = MAKE   $@
1362 define cmd_TAGS
1363         rm -f $@; \
1364         $(call xtags,etags)
1365 endef
1366
1367 TAGS: FORCE
1368         $(call cmd,TAGS)
1369
1370 quiet_cmd_tags = MAKE   $@
1371 define cmd_tags
1372         rm -f $@; \
1373         $(call xtags,ctags)
1374 endef
1375
1376 tags: FORCE
1377         $(call cmd,tags)
1378
1379
1380 # Scripts to check various things for consistency
1381 # ---------------------------------------------------------------------------
1382
1383 includecheck:
1384         find * $(RCS_FIND_IGNORE) \
1385                 -name '*.[hcS]' -type f -print | sort \
1386                 | xargs $(PERL) -w scripts/checkincludes.pl
1387
1388 versioncheck:
1389         find * $(RCS_FIND_IGNORE) \
1390                 -name '*.[hcS]' -type f -print | sort \
1391                 | xargs $(PERL) -w scripts/checkversion.pl
1392
1393 namespacecheck:
1394         $(PERL) $(srctree)/scripts/namespace.pl
1395
1396 endif #ifeq ($(config-targets),1)
1397 endif #ifeq ($(mixed-targets),1)
1398
1399 PHONY += checkstack kernelrelease kernelversion
1400
1401 # UML needs a little special treatment here.  It wants to use the host
1402 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1403 # else wants $(ARCH), including people doing cross-builds, which means
1404 # that $(SUBARCH) doesn't work here.
1405 ifeq ($(ARCH), um)
1406 CHECKSTACK_ARCH := $(SUBARCH)
1407 else
1408 CHECKSTACK_ARCH := $(ARCH)
1409 endif
1410 checkstack:
1411         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1412         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1413
1414 kernelrelease:
1415         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1416         $(error kernelrelease not valid - run 'make prepare' to update it))
1417 kernelversion:
1418         @echo $(KERNELVERSION)
1419
1420 # Single targets
1421 # ---------------------------------------------------------------------------
1422 # Single targets are compatible with:
1423 # - build whith mixed source and output
1424 # - build with separate output dir 'make O=...'
1425 # - external modules
1426 #
1427 #  target-dir => where to store outputfile
1428 #  build-dir  => directory in kernel source tree to use
1429
1430 ifeq ($(KBUILD_EXTMOD),)
1431         build-dir  = $(patsubst %/,%,$(dir $@))
1432         target-dir = $(dir $@)
1433 else
1434         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1435         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1436         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1437 endif
1438
1439 %.s: %.c prepare scripts FORCE
1440         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1441 %.i: %.c prepare scripts FORCE
1442         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1443 %.o: %.c prepare scripts FORCE
1444         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1445 %.lst: %.c prepare scripts FORCE
1446         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1447 %.s: %.S prepare scripts FORCE
1448         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1449 %.o: %.S prepare scripts FORCE
1450         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1451 %.symtypes: %.c prepare scripts FORCE
1452         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1453
1454 # Modules
1455 / %/: prepare scripts FORCE
1456         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1457         $(build)=$(build-dir)
1458 %.ko: prepare scripts FORCE
1459         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1460         $(build)=$(build-dir) $(@:.ko=.o)
1461         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1462
1463 # FIXME Should go into a make.lib or something
1464 # ===========================================================================
1465
1466 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1467       cmd_rmdirs = rm -rf $(rm-dirs)
1468
1469 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1470       cmd_rmfiles = rm -f $(rm-files)
1471
1472
1473 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1474           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1475           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1476
1477 quiet_cmd_as_o_S = AS      $@
1478 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1479
1480 # read all saved command lines
1481
1482 targets := $(wildcard $(sort $(targets)))
1483 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1484
1485 ifneq ($(cmd_files),)
1486   $(cmd_files): ;       # Do not try to update included dependency files
1487   include $(cmd_files)
1488 endif
1489
1490 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1491 # Usage:
1492 # $(Q)$(MAKE) $(clean)=dir
1493 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1494
1495 endif   # skip-makefile
1496
1497 PHONY += FORCE
1498 FORCE:
1499
1500 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1501 Makefile: ;
1502
1503 # Declare the contents of the .PHONY variable as phony.  We keep that
1504 # information in a variable se we can use it in if_changed and friends.
1505 .PHONY: $(PHONY)