Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 14
   4 EXTRAVERSION =
   5 NAME=Affluent Albatross
   6
   7 # *DOCUMENTATION*
   8 # To see a list of typical targets execute "make help"
   9 # More info can be located in ./README
  10 # Comments in this file are targeted only to the developer, do not
  11 # expect to learn how to build the kernel reading this file.
  12
  13 # Do not print "Entering directory ..."
  14 MAKEFLAGS += --no-print-directory
  15
  16 # We are using a recursive build, so we need to do a little thinking
  17 # to get the ordering right.
  18 #
  19 # Most importantly: sub-Makefiles should only ever modify files in
  20 # their own directory. If in some directory we have a dependency on
  21 # a file in another dir (which doesn't happen often, but it's often
  22 # unavoidable when linking the built-in.o targets which finally
  23 # turn into vmlinux), we will call a sub make in that other dir, and
  24 # after that we are sure that everything which is in that other dir
  25 # is now up to date.
  26 #
  27 # The only cases where we need to modify files which have global
  28 # effects are thus separated out and done before the recursive
  29 # descending is started. They are now explicitly listed as the
  30 # prepare rule.
  31
  32 # To put more focus on warnings, be less verbose as default
  33 # Use 'make V=1' to see the full commands
  34
  35 ifdef V
  36   ifeq ("$(origin V)", "command line")
  37     KBUILD_VERBOSE = $(V)
  38   endif
  39 endif
  40 ifndef KBUILD_VERBOSE
  41   KBUILD_VERBOSE = 0
  42 endif
  43
  44 # Call sparse as part of compilation of C files
  45 # Use 'make C=1' to enable sparse checking
  46
  47 ifdef C
  48   ifeq ("$(origin C)", "command line")
  49     KBUILD_CHECKSRC = $(C)
  50   endif
  51 endif
  52 ifndef KBUILD_CHECKSRC
  53   KBUILD_CHECKSRC = 0
  54 endif
  55
  56 # Use make M=dir to specify directory of external module to build
  57 # Old syntax make ... SUBDIRS=$PWD is still supported
  58 # Setting the environment variable KBUILD_EXTMOD take precedence
  59 ifdef SUBDIRS
  60   KBUILD_EXTMOD ?= $(SUBDIRS)
  61 endif
  62 ifdef M
  63   ifeq ("$(origin M)", "command line")
  64     KBUILD_EXTMOD := $(M)
  65   endif
  66 endif
  67
  68
  69 # kbuild supports saving output files in a separate directory.
  70 # To locate output files in a separate directory two syntaxes are supported.
  71 # In both cases the working directory must be the root of the kernel src.
  72 # 1) O=
  73 # Use "make O=dir/to/store/output/files/"
  74 #
  75 # 2) Set KBUILD_OUTPUT
  76 # Set the environment variable KBUILD_OUTPUT to point to the directory
  77 # where the output files shall be placed.
  78 # export KBUILD_OUTPUT=dir/to/store/output/files/
  79 # make
  80 #
  81 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  82 # variable.
  83
  84
  85 # KBUILD_SRC is set on invocation of make in OBJ directory
  86 # KBUILD_SRC is not intended to be used by the regular user (for now)
  87 ifeq ($(KBUILD_SRC),)
  88
  89 # OK, Make called in directory where kernel src resides
  90 # Do we want to locate output files in a separate directory?
  91 ifdef O
  92   ifeq ("$(origin O)", "command line")
  93     KBUILD_OUTPUT := $(O)
  94   endif
  95 endif
  96
  97 # That's our default target when none is given on the command line
  98 .PHONY: _all
  99 _all:
 100
 101 ifneq ($(KBUILD_OUTPUT),)
 102 # Invoke a second make in the output directory, passing relevant variables
 103 # check that the output directory actually exists
 104 saved-output := $(KBUILD_OUTPUT)
 105 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 106 $(if $(KBUILD_OUTPUT),, \
 107      $(error output directory "$(saved-output)" does not exist))
 108
 109 .PHONY: $(MAKECMDGOALS)
 110
 111 $(filter-out _all,$(MAKECMDGOALS)) _all:
 112         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 113         KBUILD_SRC=$(CURDIR) \
 114         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
 115
 116 # Leave processing to above invocation of make
 117 skip-makefile := 1
 118 endif # ifneq ($(KBUILD_OUTPUT),)
 119 endif # ifeq ($(KBUILD_SRC),)
 120
 121 # We process the rest of the Makefile if this is the final invocation of make
 122 ifeq ($(skip-makefile),)
 123
 124 # If building an external module we do not care about the all: rule
 125 # but instead _all depend on modules
 126 .PHONY: all
 127 ifeq ($(KBUILD_EXTMOD),)
 128 _all: all
 129 else
 130 _all: modules
 131 endif
 132
 133 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 134 TOPDIR          := $(srctree)
 135 # FIXME - TOPDIR is obsolete, use srctree/objtree
 136 objtree         := $(CURDIR)
 137 src             := $(srctree)
 138 obj             := $(objtree)
 139
 140 VPATH           := $(srctree)
 141
 142 export srctree objtree VPATH TOPDIR
 143
 144 nullstring :=
 145 space      := $(nullstring) # end of line
 146
 147 # Take the contents of any files called localversion* and the config
 148 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
 149 # careful not to include files twice if building in the source
 150 # directory. LOCALVERSION from the command line override all of this
 151
 152 localver := $(objtree)/localversion* $(srctree)/localversion*
 153 localver := $(sort $(wildcard $(localver)))
 154 # skip backup files (containing '~')
 155 localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f)))
 156
 157 LOCALVERSION = $(subst $(space),, \
 158                $(shell cat /dev/null $(localver)) \
 159                $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 160
 161 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
 162
 163 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 164 # first, and if a usermode build is happening, the "ARCH=um" on the command
 165 # line overrides the setting of ARCH below.  If a native build is happening,
 166 # then ARCH is assigned, getting whatever value it gets normally, and
 167 # SUBARCH is subsequently ignored.
 168
 169 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 170                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 171                                   -e s/s390x/s390/ -e s/parisc64/parisc/ )
 172
 173 # Cross compiling and selecting different set of gcc/bin-utils
 174 # ---------------------------------------------------------------------------
 175 #
 176 # When performing cross compilation for other architectures ARCH shall be set
 177 # to the target architecture. (See arch/* for the possibilities).
 178 # ARCH can be set during invocation of make:
 179 # make ARCH=ia64
 180 # Another way is to have ARCH set in the environment.
 181 # The default ARCH is the host where make is executed.
 182
 183 # CROSS_COMPILE specify the prefix used for all executables used
 184 # during compilation. Only gcc and related bin-utils executables
 185 # are prefixed with $(CROSS_COMPILE).
 186 # CROSS_COMPILE can be set on the command line
 187 # make CROSS_COMPILE=ia64-linux-
 188 # Alternatively CROSS_COMPILE can be set in the environment.
 189 # Default value for CROSS_COMPILE is not to prefix executables
 190 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 191
 192 ARCH            ?= $(SUBARCH)
 193 CROSS_COMPILE   ?=
 194
 195 # Architecture as present in compile.h
 196 UTS_MACHINE := $(ARCH)
 197
 198 # SHELL used by kbuild
 199 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 200           else if [ -x /bin/bash ]; then echo /bin/bash; \
 201           else echo sh; fi ; fi)
 202
 203 HOSTCC          = gcc
 204 HOSTCXX         = g++
 205 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 206 HOSTCXXFLAGS    = -O2
 207
 208 #       Decide whether to build built-in, modular, or both.
 209 #       Normally, just do built-in.
 210
 211 KBUILD_MODULES :=
 212 KBUILD_BUILTIN := 1
 213
 214 #       If we have only "make modules", don't compile built-in objects.
 215 #       When we're building modules with modversions, we need to consider
 216 #       the built-in objects during the descend as well, in order to
 217 #       make sure the checksums are uptodate before we record them.
 218
 219 ifeq ($(MAKECMDGOALS),modules)
 220   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 221 endif
 222
 223 #       If we have "make <whatever> modules", compile modules
 224 #       in addition to whatever we do anyway.
 225 #       Just "make" or "make all" shall build modules as well
 226
 227 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 228   KBUILD_MODULES := 1
 229 endif
 230
 231 ifeq ($(MAKECMDGOALS),)
 232   KBUILD_MODULES := 1
 233 endif
 234
 235 export KBUILD_MODULES KBUILD_BUILTIN
 236 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 237
 238 # Beautify output
 239 # ---------------------------------------------------------------------------
 240 #
 241 # Normally, we echo the whole command before executing it. By making
 242 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 243 # $(quiet) to choose other forms of output instead, e.g.
 244 #
 245 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 246 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 247 #
 248 # If $(quiet) is empty, the whole command will be printed.
 249 # If it is set to "quiet_", only the short version will be printed.
 250 # If it is set to "silent_", nothing wil be printed at all, since
 251 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 252 #
 253 # A simple variant is to prefix commands with $(Q) - that's usefull
 254 # for commands that shall be hidden in non-verbose mode.
 255 #
 256 #       $(Q)ln $@ :<
 257 #
 258 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 259 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 260
 261 ifeq ($(KBUILD_VERBOSE),1)
 262   quiet =
 263   Q =
 264 else
 265   quiet=quiet_
 266   Q = @
 267 endif
 268
 269 # If the user is running make -s (silent mode), suppress echoing of
 270 # commands
 271
 272 ifneq ($(findstring s,$(MAKEFLAGS)),)
 273   quiet=silent_
 274 endif
 275
 276 export quiet Q KBUILD_VERBOSE
 277
 278 ######
 279 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
 280 # See documentation in Documentation/kbuild/makefiles.txt
 281
 282 # cc-option
 283 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
 284
 285 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 286              > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
 287
 288 # For backward compatibility
 289 check_gcc = $(warning check_gcc is deprecated - use cc-option) \
 290             $(call cc-option, $(1),$(2))
 291
 292 # cc-option-yn
 293 # Usage: flag := $(call cc-option-yn, -march=winchip-c6)
 294 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 295                 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
 296
 297 # cc-option-align
 298 # Prefix align with either -falign or -malign
 299 cc-option-align = $(subst -functions=0,,\
 300         $(call cc-option,-falign-functions=0,-malign-functions=0))
 301
 302 # cc-version
 303 # Usage gcc-ver := $(call cc-version $(CC))
 304 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
 305               $(if $(1), $(1), $(CC)))
 306
 307
 308 # Look for make include files relative to root of kernel src
 309 MAKEFLAGS += --include-dir=$(srctree)
 310
 311 # We need some generic definitions
 312 include  $(srctree)/scripts/Kbuild.include
 313
 314 # For maximum performance (+ possibly random breakage, uncomment
 315 # the following)
 316
 317 #MAKEFLAGS += -rR
 318
 319 # Make variables (CC, etc...)
 320
 321 AS              = $(CROSS_COMPILE)as
 322 LD              = $(CROSS_COMPILE)ld
 323 CC              = $(CROSS_COMPILE)gcc
 324 CPP             = $(CC) -E
 325 AR              = $(CROSS_COMPILE)ar
 326 NM              = $(CROSS_COMPILE)nm
 327 STRIP           = $(CROSS_COMPILE)strip
 328 OBJCOPY         = $(CROSS_COMPILE)objcopy
 329 OBJDUMP         = $(CROSS_COMPILE)objdump
 330 AWK             = awk
 331 GENKSYMS        = scripts/genksyms/genksyms
 332 DEPMOD          = /sbin/depmod
 333 KALLSYMS        = scripts/kallsyms
 334 PERL            = perl
 335 CHECK           = sparse
 336
 337 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 338 MODFLAGS        = -DMODULE
 339 CFLAGS_MODULE   = $(MODFLAGS)
 340 AFLAGS_MODULE   = $(MODFLAGS)
 341 LDFLAGS_MODULE  = -r
 342 CFLAGS_KERNEL   =
 343 AFLAGS_KERNEL   =
 344
 345
 346 # Use LINUXINCLUDE when you must reference the include/ directory.
 347 # Needed to be compatible with the O= option
 348 LINUXINCLUDE    := -Iinclude \
 349                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 350                    -include include/linux/autoconf.h
 351
 352 CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)
 353
 354 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 355                    -fno-strict-aliasing -fno-common \
 356                    -ffreestanding
 357 AFLAGS          := -D__ASSEMBLY__
 358
 359 export  VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
 360         ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 361         CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 362         HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 363
 364 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 365 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 366 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 367
 368 # When compiling out-of-tree modules, put MODVERDIR in the module
 369 # tree rather than in the kernel tree. The kernel tree might
 370 # even be read-only.
 371 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 372
 373 # Files to ignore in find ... statements
 374
 375 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
 376 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 377
 378 # ===========================================================================
 379 # Rules shared between *config targets and build targets
 380
 381 # Basic helpers built in scripts/
 382 .PHONY: scripts_basic
 383 scripts_basic:
 384         $(Q)$(MAKE) $(build)=scripts/basic
 385
 386 # To avoid any implicit rule to kick in, define an empty command.
 387 scripts/basic/%: scripts_basic ;
 388
 389 .PHONY: outputmakefile
 390 # outputmakefile generate a Makefile to be placed in output directory, if
 391 # using a seperate output directory. This allows convinient use
 392 # of make in output directory
 393 outputmakefile:
 394         $(Q)if test ! $(srctree) -ef $(objtree); then \
 395         $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile              \
 396             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)         \
 397             > $(objtree)/Makefile;                                 \
 398             echo '  GEN    $(objtree)/Makefile';                   \
 399         fi
 400
 401 # To make sure we do not include .config for any of the *config targets
 402 # catch them early, and hand them over to scripts/kconfig/Makefile
 403 # It is allowed to specify more targets when calling make, including
 404 # mixing *config targets and build targets.
 405 # For example 'make oldconfig all'.
 406 # Detect when mixed targets is specified, and make a second invocation
 407 # of make so .config is not included in this case either (for *config).
 408
 409 no-dot-config-targets := clean mrproper distclean \
 410                          cscope TAGS tags help %docs check% kernelrelease
 411
 412 config-targets := 0
 413 mixed-targets  := 0
 414 dot-config     := 1
 415
 416 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 417         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 418                 dot-config := 0
 419         endif
 420 endif
 421
 422 ifeq ($(KBUILD_EXTMOD),)
 423         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 424                 config-targets := 1
 425                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 426                         mixed-targets := 1
 427                 endif
 428         endif
 429 endif
 430
 431 ifeq ($(mixed-targets),1)
 432 # ===========================================================================
 433 # We're called with mixed targets (*config and build targets).
 434 # Handle them one by one.
 435
 436 %:: FORCE
 437         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 438
 439 else
 440 ifeq ($(config-targets),1)
 441 # ===========================================================================
 442 # *config targets only - make sure prerequisites are updated, and descend
 443 # in scripts/kconfig to make the *config target
 444
 445 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 446 # KBUILD_DEFCONFIG may point out an alternative default configuration
 447 # used for 'make defconfig'
 448 include $(srctree)/arch/$(ARCH)/Makefile
 449 export KBUILD_DEFCONFIG
 450
 451 config %config: scripts_basic outputmakefile FORCE
 452         $(Q)mkdir -p include/linux
 453         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 454
 455 else
 456 # ===========================================================================
 457 # Build targets only - this includes vmlinux, arch specific targets, clean
 458 # targets and others. In general all targets except *config targets.
 459
 460 ifeq ($(KBUILD_EXTMOD),)
 461 # Additional helpers built in scripts/
 462 # Carefully list dependencies so we do not try to build scripts twice
 463 # in parrallel
 464 .PHONY: scripts
 465 scripts: scripts_basic include/config/MARKER
 466         $(Q)$(MAKE) $(build)=$(@)
 467
 468 scripts_basic: include/linux/autoconf.h
 469
 470 # Objects we will link into vmlinux / subdirs we need to visit
 471 init-y          := init/
 472 drivers-y       := drivers/ sound/
 473 net-y           := net/
 474 libs-y          := lib/
 475 core-y          := usr/
 476 endif # KBUILD_EXTMOD
 477
 478 ifeq ($(dot-config),1)
 479 # In this section, we need .config
 480
 481 # Read in dependencies to all Kconfig* files, make sure to run
 482 # oldconfig if changes are detected.
 483 -include .config.cmd
 484
 485 include .config
 486
 487 # If .config needs to be updated, it will be done via the dependency
 488 # that autoconf has on .config.
 489 # To avoid any implicit rule to kick in, define an empty command
 490 .config: ;
 491
 492 # If .config is newer than include/linux/autoconf.h, someone tinkered
 493 # with it and forgot to run make oldconfig
 494 include/linux/autoconf.h: .config
 495         $(Q)mkdir -p include/linux
 496         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 497 else
 498 # Dummy target needed, because used as prerequisite
 499 include/linux/autoconf.h: ;
 500 endif
 501
 502 # The all: target is the default when no target is given on the
 503 # command line.
 504 # This allow a user to issue only 'make' to build a kernel including modules
 505 # Defaults vmlinux but it is usually overriden in the arch makefile
 506 all: vmlinux
 507
 508 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 509 CFLAGS          += -Os
 510 else
 511 CFLAGS          += -O2
 512 endif
 513
 514 #Add align options if CONFIG_CC_* is not equal to 0
 515 add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
 516 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
 517 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
 518 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
 519 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
 520
 521 ifdef CONFIG_FRAME_POINTER
 522 CFLAGS          += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
 523 else
 524 CFLAGS          += -fomit-frame-pointer
 525 endif
 526
 527 ifdef CONFIG_DEBUG_INFO
 528 CFLAGS          += -g
 529 endif
 530
 531 include $(srctree)/arch/$(ARCH)/Makefile
 532
 533 # arch Makefile may override CC so keep this after arch Makefile is included
 534 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 535 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 536
 537 # warn about C99 declaration after statement
 538 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 539
 540 # disable pointer signedness warnings in gcc 4.0
 541 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 542
 543 # Default kernel image to build when no specific target is given.
 544 # KBUILD_IMAGE may be overruled on the commandline or
 545 # set in the environment
 546 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 547 # this default value
 548 export KBUILD_IMAGE ?= vmlinux
 549
 550 #
 551 # INSTALL_PATH specifies where to place the updated kernel and system map
 552 # images. Default is /boot, but you can set it to other values
 553 export  INSTALL_PATH ?= /boot
 554
 555 # If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests
 556 # and try to determine if the current source tree is a release tree, of any sort,
 557 # or if is a pure development tree.
 558 #
 559 # A 'release tree' is any tree with a git TAG associated
 560 # with it.  The primary goal of this is to make it safe for a native
 561 # git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to
 562 # continue developing against the current Linus tree, without having the Linus
 563 # tree overwrite the 2.6.9 tree when installed.
 564 #
 565 # Currently, only git is supported.
 566 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 567 # checks as needed.
 568
 569
 570 ifdef CONFIG_LOCALVERSION_AUTO
 571         localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree))
 572         LOCALVERSION := $(LOCALVERSION)$(localversion-auto)
 573 endif
 574
 575 #
 576 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 577 # relocations required by build roots.  This is not defined in the
 578 # makefile but the arguement can be passed to make if needed.
 579 #
 580
 581 MODLIB  := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 582 export MODLIB
 583
 584
 585 ifeq ($(KBUILD_EXTMOD),)
 586 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 587
 588 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 589                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 590                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 591
 592 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 593                      $(init-n) $(init-) \
 594                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 595                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 596
 597 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 598 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 599 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 600 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 601 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 602 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 603 libs-y          := $(libs-y1) $(libs-y2)
 604
 605 # Build vmlinux
 606 # ---------------------------------------------------------------------------
 607 # vmlinux is build from the objects selected by $(vmlinux-init) and
 608 # $(vmlinux-main). Most are built-in.o files from top-level directories
 609 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 610 # Ordering when linking is important, and $(vmlinux-init) must be first.
 611 #
 612 # vmlinux
 613 #   ^
 614 #   |
 615 #   +-< $(vmlinux-init)
 616 #   |   +--< init/version.o + more
 617 #   |
 618 #   +--< $(vmlinux-main)
 619 #   |    +--< driver/built-in.o mm/built-in.o + more
 620 #   |
 621 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 622 #
 623 # vmlinux version (uname -v) cannot be updated during normal
 624 # descending-into-subdirs phase since we do not yet know if we need to
 625 # update vmlinux.
 626 # Therefore this step is delayed until just before final link of vmlinux -
 627 # except in the kallsyms case where it is done just before adding the
 628 # symbols to the kernel.
 629 #
 630 # System.map is generated to document addresses of all kernel symbols
 631
 632 vmlinux-init := $(head-y) $(init-y)
 633 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 634 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 635 vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
 636
 637 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 638 # May be overridden by arch/$(ARCH)/Makefile
 639 quiet_cmd_vmlinux__ ?= LD      $@
 640       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 641       -T $(vmlinux-lds) $(vmlinux-init)                          \
 642       --start-group $(vmlinux-main) --end-group                  \
 643       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 644
 645 # Generate new vmlinux version
 646 quiet_cmd_vmlinux_version = GEN     .version
 647       cmd_vmlinux_version = set -e;                     \
 648         if [ ! -r .version ]; then                      \
 649           rm -f .version;                               \
 650           echo 1 >.version;                             \
 651         else                                            \
 652           mv .version .old_version;                     \
 653           expr 0$$(cat .old_version) + 1 >.version;     \
 654         fi;                                             \
 655         $(MAKE) $(build)=init
 656
 657 # Generate System.map
 658 quiet_cmd_sysmap = SYSMAP
 659       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 660
 661 # Link of vmlinux
 662 # If CONFIG_KALLSYMS is set .version is already updated
 663 # Generate System.map and verify that the content is consistent
 664 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 665 # First command is ':' to allow us to use + in front of the rule
 666 define rule_vmlinux__
 667         :
 668         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 669
 670         $(call cmd,vmlinux__)
 671         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 672
 673         $(Q)$(if $($(quiet)cmd_sysmap),                 \
 674           echo '  $($(quiet)cmd_sysmap) System.map' &&) \
 675         $(cmd_sysmap) $@ System.map;                    \
 676         if [ $$? -ne 0 ]; then                          \
 677                 rm -f $@;                               \
 678                 /bin/false;                             \
 679         fi;
 680         $(verify_kallsyms)
 681 endef
 682
 683
 684 ifdef CONFIG_KALLSYMS
 685 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 686 # It's a three stage process:
 687 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 688 #   empty
 689 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 690 #   the right size - vmlinux version (uname -v) is updated during this step
 691 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 692 #   but due to the added section, some addresses have shifted.
 693 #   From here, we generate a correct .tmp_kallsyms2.o
 694 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 695 # o Verify that the System.map from vmlinux matches the map from
 696 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 697 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 698 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 699 #   temporary bypass to allow the kernel to be built while the
 700 #   maintainers work out what went wrong with kallsyms.
 701
 702 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 703 last_kallsyms := 3
 704 else
 705 last_kallsyms := 2
 706 endif
 707
 708 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 709
 710 define verify_kallsyms
 711         $(Q)$(if $($(quiet)cmd_sysmap),                       \
 712           echo '  $($(quiet)cmd_sysmap) .tmp_System.map' &&)  \
 713           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 714         $(Q)cmp -s System.map .tmp_System.map ||              \
 715                 (echo Inconsistent kallsyms data;             \
 716                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
 717                  rm .tmp_kallsyms* ; /bin/false )
 718 endef
 719
 720 # Update vmlinux version before link
 721 # Use + in front of this rule to silent warning about make -j1
 722 # First command is ':' to allow us to use + in front of this rule
 723 cmd_ksym_ld = $(cmd_vmlinux__)
 724 define rule_ksym_ld
 725         :
 726         +$(call cmd,vmlinux_version)
 727         $(call cmd,vmlinux__)
 728         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 729 endef
 730
 731 # Generate .S file with all kernel symbols
 732 quiet_cmd_kallsyms = KSYM    $@
 733       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 734                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 735
 736 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 737         $(call if_changed_dep,as_o_S)
 738
 739 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 740         $(call cmd,kallsyms)
 741
 742 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 743 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 744         $(call if_changed_rule,ksym_ld)
 745
 746 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 747         $(call if_changed,vmlinux__)
 748
 749 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 750         $(call if_changed,vmlinux__)
 751
 752 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 753 $(KALLSYMS): scripts ;
 754
 755 # Generate some data for debugging strange kallsyms problems
 756 debug_kallsyms: .tmp_map$(last_kallsyms)
 757
 758 .tmp_map%: .tmp_vmlinux% FORCE
 759         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 760
 761 .tmp_map3: .tmp_map2
 762
 763 .tmp_map2: .tmp_map1
 764
 765 endif # ifdef CONFIG_KALLSYMS
 766
 767 # vmlinux image - including updated kernel symbols
 768 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 769         $(call if_changed_rule,vmlinux__)
 770         $(Q)rm -f .old_version
 771
 772 # The actual objects are generated when descending,
 773 # make sure no implicit rule kicks in
 774 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 775
 776 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 777 # Preset locale variables to speed up the build process. Limit locale
 778 # tweaks to this spot to avoid wrong language settings when running
 779 # make menuconfig etc.
 780 # Error messages still appears in the original language
 781
 782 .PHONY: $(vmlinux-dirs)
 783 $(vmlinux-dirs): prepare scripts
 784         $(Q)$(MAKE) $(build)=$@
 785
 786 # Things we need to do before we recursively start building the kernel
 787 # or the modules are listed in "prepare".
 788 # A multi level approach is used. prepareN is processed before prepareN-1.
 789 # archprepare is used in arch Makefiles and when processed asm symlink,
 790 # version.h and scripts_basic is processed / created.
 791
 792 # Listed in dependency order
 793 .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
 794
 795 # prepare-all is deprecated, use prepare as valid replacement
 796 .PHONY: prepare-all
 797
 798 # prepare3 is used to check if we are building in a separate output directory,
 799 # and if so do:
 800 # 1) Check that make has not been executed in the kernel src $(srctree)
 801 # 2) Create the include2 directory, used for the second asm symlink
 802
 803 prepare3:
 804 ifneq ($(KBUILD_SRC),)
 805         @echo '  Using $(srctree) as source for kernel'
 806         $(Q)if [ -f $(srctree)/.config ]; then \
 807                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 808                 echo "  in the '$(srctree)' directory.";\
 809                 /bin/false; \
 810         fi;
 811         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 812         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 813 endif
 814
 815 # prepare2 creates a makefile if using a separate output directory
 816 prepare2: prepare3 outputmakefile
 817
 818 prepare1: prepare2 include/linux/version.h include/asm \
 819                    include/config/MARKER
 820 ifneq ($(KBUILD_MODULES),)
 821         $(Q)rm -rf $(MODVERDIR)
 822         $(Q)mkdir -p $(MODVERDIR)
 823 endif
 824
 825 archprepare: prepare1 scripts_basic
 826
 827 prepare0: archprepare FORCE
 828         $(Q)$(MAKE) $(build)=.
 829
 830 # All the preparing..
 831 prepare prepare-all: prepare0
 832
 833 #       Leave this as default for preprocessing vmlinux.lds.S, which is now
 834 #       done in arch/$(ARCH)/kernel/Makefile
 835
 836 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 837
 838 # Single targets
 839 # ---------------------------------------------------------------------------
 840
 841 %.s: %.c scripts FORCE
 842         $(Q)$(MAKE) $(build)=$(@D) $@
 843 %.i: %.c scripts FORCE
 844         $(Q)$(MAKE) $(build)=$(@D) $@
 845 %.o: %.c scripts FORCE
 846         $(Q)$(MAKE) $(build)=$(@D) $@
 847 %.ko: scripts FORCE
 848         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
 849         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 850 %/:      scripts prepare FORCE
 851         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
 852 %.lst: %.c scripts FORCE
 853         $(Q)$(MAKE) $(build)=$(@D) $@
 854 %.s: %.S scripts FORCE
 855         $(Q)$(MAKE) $(build)=$(@D) $@
 856 %.o: %.S scripts FORCE
 857         $(Q)$(MAKE) $(build)=$(@D) $@
 858
 859 #       FIXME: The asm symlink changes when $(ARCH) changes. That's
 860 #       hard to detect, but I suppose "make mrproper" is a good idea
 861 #       before switching between archs anyway.
 862
 863 include/asm:
 864         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 865         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 866         @ln -fsn asm-$(ARCH) $@
 867
 868 #       Split autoconf.h into include/linux/config/*
 869
 870 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
 871         @echo '  SPLIT   include/linux/autoconf.h -> include/config/*'
 872         @scripts/basic/split-include include/linux/autoconf.h include/config
 873         @touch $@
 874
 875 # Generate some files
 876 # ---------------------------------------------------------------------------
 877
 878 # KERNELRELEASE can change from a few different places, meaning version.h
 879 # needs to be updated, so this check is forced on all builds
 880
 881 uts_len := 64
 882
 883 define filechk_version.h
 884         if [ `echo -n "$(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           echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
 890          echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
 891         )
 892 endef
 893
 894 include/linux/version.h: $(srctree)/Makefile FORCE
 895         $(call filechk,version.h)
 896
 897 # ---------------------------------------------------------------------------
 898
 899 .PHONY: depend dep
 900 depend dep:
 901         @echo '*** Warning: make $@ is unnecessary now.'
 902
 903 # ---------------------------------------------------------------------------
 904 # Modules
 905
 906 ifdef CONFIG_MODULES
 907
 908 #       By default, build modules as well
 909
 910 all: modules
 911
 912 #       Build modules
 913
 914 .PHONY: modules
 915 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
 916         @echo '  Building modules, stage 2.';
 917         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 918
 919
 920 # Target to prepare building external modules
 921 .PHONY: modules_prepare
 922 modules_prepare: prepare scripts
 923
 924 # Target to install modules
 925 .PHONY: modules_install
 926 modules_install: _modinst_ _modinst_post
 927
 928 .PHONY: _modinst_
 929 _modinst_:
 930         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 931                 echo "Warning: you may need to install module-init-tools"; \
 932                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 933                 sleep 1; \
 934         fi
 935         @rm -rf $(MODLIB)/kernel
 936         @rm -f $(MODLIB)/source
 937         @mkdir -p $(MODLIB)/kernel
 938         @ln -s $(srctree) $(MODLIB)/source
 939         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 940                 rm -f $(MODLIB)/build ; \
 941                 ln -s $(objtree) $(MODLIB)/build ; \
 942         fi
 943         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
 944
 945 # If System.map exists, run depmod.  This deliberately does not have a
 946 # dependency on System.map since that would run the dependency tree on
 947 # vmlinux.  This depmod is only for convenience to give the initial
 948 # boot a modules.dep even before / is mounted read-write.  However the
 949 # boot script depmod is the master version.
 950 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 951 depmod_opts     :=
 952 else
 953 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 954 endif
 955 .PHONY: _modinst_post
 956 _modinst_post: _modinst_
 957         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 958
 959 else # CONFIG_MODULES
 960
 961 # Modules not configured
 962 # ---------------------------------------------------------------------------
 963
 964 modules modules_install: FORCE
 965         @echo
 966         @echo "The present kernel configuration has modules disabled."
 967         @echo "Type 'make config' and enable loadable module support."
 968         @echo "Then build a kernel with module support enabled."
 969         @echo
 970         @exit 1
 971
 972 endif # CONFIG_MODULES
 973
 974 ###
 975 # Cleaning is done on three levels.
 976 # make clean     Delete most generated files
 977 #                Leave enough to build external modules
 978 # make mrproper  Delete the current configuration, and all generated files
 979 # make distclean Remove editor backup files, patch leftover files and the like
 980
 981 # Directories & files removed with 'make clean'
 982 CLEAN_DIRS  += $(MODVERDIR)
 983 CLEAN_FILES +=  vmlinux System.map \
 984                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
 985
 986 # Directories & files removed with 'make mrproper'
 987 MRPROPER_DIRS  += include/config include2
 988 MRPROPER_FILES += .config .config.old include/asm .version \
 989                   include/linux/autoconf.h include/linux/version.h \
 990                   Module.symvers tags TAGS cscope*
 991
 992 # clean - Delete most, but leave enough to build external modules
 993 #
 994 clean: rm-dirs  := $(CLEAN_DIRS)
 995 clean: rm-files := $(CLEAN_FILES)
 996 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
 997
 998 .PHONY: $(clean-dirs) clean archclean
 999 $(clean-dirs):
1000         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1001
1002 clean: archclean $(clean-dirs)
1003         $(call cmd,rmdirs)
1004         $(call cmd,rmfiles)
1005         @find . $(RCS_FIND_IGNORE) \
1006                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1007                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1008                 -type f -print | xargs rm -f
1009
1010 # mrproper - Delete all generated files, including .config
1011 #
1012 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1013 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1014 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1015
1016 .PHONY: $(mrproper-dirs) mrproper archmrproper
1017 $(mrproper-dirs):
1018         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1019
1020 mrproper: clean archmrproper $(mrproper-dirs)
1021         $(call cmd,rmdirs)
1022         $(call cmd,rmfiles)
1023
1024 # distclean
1025 #
1026 .PHONY: distclean
1027
1028 distclean: mrproper
1029         @find $(srctree) $(RCS_FIND_IGNORE) \
1030                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1031                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1032                 -o -name '.*.rej' -o -size 0 \
1033                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1034                 -type f -print | xargs rm -f
1035
1036
1037 # Packaging of the kernel to various formats
1038 # ---------------------------------------------------------------------------
1039 # rpm target kept for backward compatibility
1040 package-dir     := $(srctree)/scripts/package
1041
1042 .PHONY: %-pkg rpm
1043
1044 %pkg: FORCE
1045         $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1046 rpm: FORCE
1047         $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1048
1049
1050 # Brief documentation of the typical targets used
1051 # ---------------------------------------------------------------------------
1052
1053 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1054 boards := $(notdir $(boards))
1055
1056 help:
1057         @echo  'Cleaning targets:'
1058         @echo  '  clean           - remove most generated files but keep the config'
1059         @echo  '  mrproper        - remove all generated files + config + various backup files'
1060         @echo  ''
1061         @echo  'Configuration targets:'
1062         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1063         @echo  ''
1064         @echo  'Other generic targets:'
1065         @echo  '  all             - Build all targets marked with [*]'
1066         @echo  '* vmlinux         - Build the bare kernel'
1067         @echo  '* modules         - Build all modules'
1068         @echo  '  modules_install - Install all modules'
1069         @echo  '  dir/            - Build all files in dir and below'
1070         @echo  '  dir/file.[ois]  - Build specified target only'
1071         @echo  '  dir/file.ko     - Build module including final link'
1072         @echo  '  rpm             - Build a kernel as an RPM package'
1073         @echo  '  tags/TAGS       - Generate tags file for editors'
1074         @echo  '  cscope          - Generate cscope index'
1075         @echo  '  kernelrelease   - Output the release version string'
1076         @echo  ''
1077         @echo  'Static analysers'
1078         @echo  '  buildcheck      - List dangling references to vmlinux discarded sections'
1079         @echo  '                    and init sections from non-init sections'
1080         @echo  '  checkstack      - Generate a list of stack hogs'
1081         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1082         @echo  ''
1083         @echo  'Kernel packaging:'
1084         @$(MAKE) -f $(package-dir)/Makefile help
1085         @echo  ''
1086         @echo  'Documentation targets:'
1087         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1088         @echo  ''
1089         @echo  'Architecture specific targets ($(ARCH)):'
1090         @$(if $(archhelp),$(archhelp),\
1091                 echo '  No architecture specific help defined for $(ARCH)')
1092         @echo  ''
1093         @$(if $(boards), \
1094                 $(foreach b, $(boards), \
1095                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1096                 echo '')
1097
1098         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1099         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1100         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse)'
1101         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK (sparse)'
1102         @echo  ''
1103         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1104         @echo  'For further info see the ./README file'
1105
1106
1107 # Documentation targets
1108 # ---------------------------------------------------------------------------
1109 %docs: scripts_basic FORCE
1110         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1111
1112 else # KBUILD_EXTMOD
1113
1114 ###
1115 # External module support.
1116 # When building external modules the kernel used as basis is considered
1117 # read-only, and no consistency checks are made and the make
1118 # system is not used on the basis kernel. If updates are required
1119 # in the basis kernel ordinary make commands (without M=...) must
1120 # be used.
1121 #
1122 # The following are the only valid targets when building external
1123 # modules.
1124 # make M=dir clean     Delete all automatically generated files
1125 # make M=dir modules   Make all modules in specified dir
1126 # make M=dir           Same as 'make M=dir modules'
1127 # make M=dir modules_install
1128 #                      Install the modules build in the module directory
1129 #                      Assumes install directory is already created
1130
1131 # We are always building modules
1132 KBUILD_MODULES := 1
1133 .PHONY: crmodverdir
1134 crmodverdir:
1135         $(Q)mkdir -p $(MODVERDIR)
1136
1137 .PHONY: $(objtree)/Module.symvers
1138 $(objtree)/Module.symvers:
1139         @test -e $(objtree)/Module.symvers || ( \
1140         echo; \
1141         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1142         echo "           is missing; modules will have no dependencies and modversions."; \
1143         echo )
1144
1145 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1146 .PHONY: $(module-dirs) modules
1147 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1148         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1149
1150 modules: $(module-dirs)
1151         @echo '  Building modules, stage 2.';
1152         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1153
1154 .PHONY: modules_install
1155 modules_install:
1156         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1157
1158 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1159
1160 .PHONY: $(clean-dirs) clean
1161 $(clean-dirs):
1162         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1163
1164 clean:  rm-dirs := $(MODVERDIR)
1165 clean: $(clean-dirs)
1166         $(call cmd,rmdirs)
1167         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1168                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1169                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1170                 -type f -print | xargs rm -f
1171
1172 help:
1173         @echo  '  Building external modules.'
1174         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1175         @echo  ''
1176         @echo  '  modules         - default target, build the module(s)'
1177         @echo  '  modules_install - install the module'
1178         @echo  '  clean           - remove generated files in module directory only'
1179         @echo  ''
1180 endif # KBUILD_EXTMOD
1181
1182 # Generate tags for editors
1183 # ---------------------------------------------------------------------------
1184
1185 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1186 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1187 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1188
1189 ifeq ($(src),$(obj))
1190 __srctree =
1191 else
1192 __srctree = $(srctree)/
1193 endif
1194
1195 ALLSOURCE_ARCHS := $(ARCH)
1196
1197 define all-sources
1198         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1199                \( -name include -o -name arch \) -prune -o \
1200                -name '*.[chS]' -print; \
1201           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1202                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1203                     -name '*.[chS]' -print; \
1204           done ; \
1205           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1206                -name '*.[chS]' -print; \
1207           find $(__srctree)include $(RCS_FIND_IGNORE) \
1208                \( -name config -o -name 'asm-*' \) -prune \
1209                -o -name '*.[chS]' -print; \
1210           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1211                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1212                     -name '*.[chS]' -print; \
1213           done ; \
1214           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1215                -name '*.[chS]' -print )
1216 endef
1217
1218 quiet_cmd_cscope-file = FILELST cscope.files
1219       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1220
1221 quiet_cmd_cscope = MAKE    cscope.out
1222       cmd_cscope = cscope -b
1223
1224 cscope: FORCE
1225         $(call cmd,cscope-file)
1226         $(call cmd,cscope)
1227
1228 quiet_cmd_TAGS = MAKE   $@
1229 define cmd_TAGS
1230         rm -f $@; \
1231         ETAGSF=`etags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1232         $(all-sources) | xargs etags $$ETAGSF -a
1233 endef
1234
1235 TAGS: FORCE
1236         $(call cmd,TAGS)
1237
1238
1239 quiet_cmd_tags = MAKE   $@
1240 define cmd_tags
1241         rm -f $@; \
1242         CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1243         $(all-sources) | xargs ctags $$CTAGSF -a
1244 endef
1245
1246 tags: FORCE
1247         $(call cmd,tags)
1248
1249
1250 # Scripts to check various things for consistency
1251 # ---------------------------------------------------------------------------
1252
1253 includecheck:
1254         find * $(RCS_FIND_IGNORE) \
1255                 -name '*.[hcS]' -type f -print | sort \
1256                 | xargs $(PERL) -w scripts/checkincludes.pl
1257
1258 versioncheck:
1259         find * $(RCS_FIND_IGNORE) \
1260                 -name '*.[hcS]' -type f -print | sort \
1261                 | xargs $(PERL) -w scripts/checkversion.pl
1262
1263 buildcheck:
1264         $(PERL) $(srctree)/scripts/reference_discarded.pl
1265         $(PERL) $(srctree)/scripts/reference_init.pl
1266
1267 namespacecheck:
1268         $(PERL) $(srctree)/scripts/namespace.pl
1269
1270 endif #ifeq ($(config-targets),1)
1271 endif #ifeq ($(mixed-targets),1)
1272
1273 .PHONY: checkstack
1274 checkstack:
1275         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1276         $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1277
1278 kernelrelease:
1279         @echo $(KERNELRELEASE)
1280
1281 # FIXME Should go into a make.lib or something
1282 # ===========================================================================
1283
1284 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1285       cmd_rmdirs = rm -rf $(rm-dirs)
1286
1287 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1288       cmd_rmfiles = rm -f $(rm-files)
1289
1290
1291 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1292           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1293           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1294
1295 quiet_cmd_as_o_S = AS      $@
1296 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1297
1298 # read all saved command lines
1299
1300 targets := $(wildcard $(sort $(targets)))
1301 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1302
1303 ifneq ($(cmd_files),)
1304   $(cmd_files): ;       # Do not try to update included dependency files
1305   include $(cmd_files)
1306 endif
1307
1308 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1309 # Usage:
1310 # $(Q)$(MAKE) $(clean)=dir
1311 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1312
1313 endif   # skip-makefile
1314
1315 FORCE: