Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 16
   4 EXTRAVERSION = .26
   5 NAME=Sliding Snow Leopard
   6
   7 # *DOCUMENTATION*
   8 # To see a list of typical targets execute "make help"
   9 # More info can be located in ./README
  10 # Comments in this file are targeted only to the developer, do not
  11 # expect to learn how to build the kernel reading this file.
  12
  13 # Do not print "Entering directory ..."
  14 MAKEFLAGS += --no-print-directory
  15
  16 # We are using a recursive build, so we need to do a little thinking
  17 # to get the ordering right.
  18 #
  19 # Most importantly: sub-Makefiles should only ever modify files in
  20 # their own directory. If in some directory we have a dependency on
  21 # a file in another dir (which doesn't happen often, but it's often
  22 # unavoidable when linking the built-in.o targets which finally
  23 # turn into vmlinux), we will call a sub make in that other dir, and
  24 # after that we are sure that everything which is in that other dir
  25 # is now up to date.
  26 #
  27 # The only cases where we need to modify files which have global
  28 # effects are thus separated out and done before the recursive
  29 # descending is started. They are now explicitly listed as the
  30 # prepare rule.
  31
  32 # To put more focus on warnings, be less verbose as default
  33 # Use 'make V=1' to see the full commands
  34
  35 ifdef V
  36   ifeq ("$(origin V)", "command line")
  37     KBUILD_VERBOSE = $(V)
  38   endif
  39 endif
  40 ifndef KBUILD_VERBOSE
  41   KBUILD_VERBOSE = 0
  42 endif
  43
  44 # Call sparse as part of compilation of C files
  45 # Use 'make C=1' to enable sparse checking
  46
  47 ifdef C
  48   ifeq ("$(origin C)", "command line")
  49     KBUILD_CHECKSRC = $(C)
  50   endif
  51 endif
  52 ifndef KBUILD_CHECKSRC
  53   KBUILD_CHECKSRC = 0
  54 endif
  55
  56 # Use make M=dir to specify directory of external module to build
  57 # Old syntax make ... SUBDIRS=$PWD is still supported
  58 # Setting the environment variable KBUILD_EXTMOD take precedence
  59 ifdef SUBDIRS
  60   KBUILD_EXTMOD ?= $(SUBDIRS)
  61 endif
  62 ifdef M
  63   ifeq ("$(origin M)", "command line")
  64     KBUILD_EXTMOD := $(M)
  65   endif
  66 endif
  67
  68
  69 # kbuild supports saving output files in a separate directory.
  70 # To locate output files in a separate directory two syntaxes are supported.
  71 # In both cases the working directory must be the root of the kernel src.
  72 # 1) O=
  73 # Use "make O=dir/to/store/output/files/"
  74 #
  75 # 2) Set KBUILD_OUTPUT
  76 # Set the environment variable KBUILD_OUTPUT to point to the directory
  77 # where the output files shall be placed.
  78 # export KBUILD_OUTPUT=dir/to/store/output/files/
  79 # make
  80 #
  81 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  82 # variable.
  83
  84
  85 # KBUILD_SRC is set on invocation of make in OBJ directory
  86 # KBUILD_SRC is not intended to be used by the regular user (for now)
  87 ifeq ($(KBUILD_SRC),)
  88
  89 # OK, Make called in directory where kernel src resides
  90 # Do we want to locate output files in a separate directory?
  91 ifdef O
  92   ifeq ("$(origin O)", "command line")
  93     KBUILD_OUTPUT := $(O)
  94   endif
  95 endif
  96
  97 # That's our default target when none is given on the command line
  98 .PHONY: _all
  99 _all:
 100
 101 ifneq ($(KBUILD_OUTPUT),)
 102 # Invoke a second make in the output directory, passing relevant variables
 103 # check that the output directory actually exists
 104 saved-output := $(KBUILD_OUTPUT)
 105 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 106 $(if $(KBUILD_OUTPUT),, \
 107      $(error output directory "$(saved-output)" does not exist))
 108
 109 .PHONY: $(MAKECMDGOALS)
 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
 145 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 146 # first, and if a usermode build is happening, the "ARCH=um" on the command
 147 # line overrides the setting of ARCH below.  If a native build is happening,
 148 # then ARCH is assigned, getting whatever value it gets normally, and
 149 # SUBARCH is subsequently ignored.
 150
 151 SUBARCH := mips
 152
 153 # Cross compiling and selecting different set of gcc/bin-utils
 154 # ---------------------------------------------------------------------------
 155 #
 156 # When performing cross compilation for other architectures ARCH shall be set
 157 # to the target architecture. (See arch/* for the possibilities).
 158 # ARCH can be set during invocation of make:
 159 # make ARCH=ia64
 160 # Another way is to have ARCH set in the environment.
 161 # The default ARCH is the host where make is executed.
 162
 163 # CROSS_COMPILE specify the prefix used for all executables used
 164 # during compilation. Only gcc and related bin-utils executables
 165 # are prefixed with $(CROSS_COMPILE).
 166 # CROSS_COMPILE can be set on the command line
 167 # make CROSS_COMPILE=ia64-linux-
 168 # Alternatively CROSS_COMPILE can be set in the environment.
 169 # Default value for CROSS_COMPILE is not to prefix executables
 170 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 171
 172 ARCH            ?= $(SUBARCH)
 173 CROSS_COMPILE   ?=
 174
 175 # Architecture as present in compile.h
 176 UTS_MACHINE := $(ARCH)
 177
 178 # SHELL used by kbuild
 179 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 180           else if [ -x /bin/bash ]; then echo /bin/bash; \
 181           else echo sh; fi ; fi)
 182
 183 HOSTCC          = gcc
 184 HOSTCXX         = g++
 185 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 186 HOSTCXXFLAGS    = -O2
 187
 188 #       Decide whether to build built-in, modular, or both.
 189 #       Normally, just do built-in.
 190
 191 KBUILD_MODULES :=
 192 KBUILD_BUILTIN := 1
 193
 194 #       If we have only "make modules", don't compile built-in objects.
 195 #       When we're building modules with modversions, we need to consider
 196 #       the built-in objects during the descend as well, in order to
 197 #       make sure the checksums are uptodate before we record them.
 198
 199 ifeq ($(MAKECMDGOALS),modules)
 200   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 201 endif
 202
 203 #       If we have "make <whatever> modules", compile modules
 204 #       in addition to whatever we do anyway.
 205 #       Just "make" or "make all" shall build modules as well
 206
 207 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 208   KBUILD_MODULES := 1
 209 endif
 210
 211 ifeq ($(MAKECMDGOALS),)
 212   KBUILD_MODULES := 1
 213 endif
 214
 215 export KBUILD_MODULES KBUILD_BUILTIN
 216 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 217
 218 # Beautify output
 219 # ---------------------------------------------------------------------------
 220 #
 221 # Normally, we echo the whole command before executing it. By making
 222 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 223 # $(quiet) to choose other forms of output instead, e.g.
 224 #
 225 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 226 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 227 #
 228 # If $(quiet) is empty, the whole command will be printed.
 229 # If it is set to "quiet_", only the short version will be printed.
 230 # If it is set to "silent_", nothing wil be printed at all, since
 231 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 232 #
 233 # A simple variant is to prefix commands with $(Q) - that's useful
 234 # for commands that shall be hidden in non-verbose mode.
 235 #
 236 #       $(Q)ln $@ :<
 237 #
 238 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 239 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 240
 241 ifeq ($(KBUILD_VERBOSE),1)
 242   quiet =
 243   Q =
 244 else
 245   quiet=quiet_
 246   Q = @
 247 endif
 248
 249 # If the user is running make -s (silent mode), suppress echoing of
 250 # commands
 251
 252 ifneq ($(findstring s,$(MAKEFLAGS)),)
 253   quiet=silent_
 254 endif
 255
 256 export quiet Q KBUILD_VERBOSE
 257
 258 ######
 259 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
 260 # See documentation in Documentation/kbuild/makefiles.txt
 261
 262 # as-option
 263 # Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
 264
 265 as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
 266              -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
 267              else echo "$(2)"; fi ;)
 268
 269 # cc-option
 270 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
 271
 272 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 273              > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
 274
 275 # cc-option-yn
 276 # Usage: flag := $(call cc-option-yn, -march=winchip-c6)
 277 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 278                 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
 279
 280 # cc-option-align
 281 # Prefix align with either -falign or -malign
 282 cc-option-align = $(subst -functions=0,,\
 283         $(call cc-option,-falign-functions=0,-malign-functions=0))
 284
 285 # cc-version
 286 # Usage gcc-ver := $(call cc-version $(CC))
 287 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
 288               $(if $(1), $(1), $(CC)))
 289
 290
 291 # Look for make include files relative to root of kernel src
 292 MAKEFLAGS += --include-dir=$(srctree)
 293
 294 # We need some generic definitions
 295 include  $(srctree)/scripts/Kbuild.include
 296
 297 # For maximum performance (+ possibly random breakage, uncomment
 298 # the following)
 299
 300 #MAKEFLAGS += -rR
 301
 302 # Make variables (CC, etc...)
 303
 304 AS              = $(CROSS_COMPILE)as
 305 LD              = $(CROSS_COMPILE)ld
 306 CC              = $(CROSS_COMPILE)gcc
 307 CPP             = $(CC) -E
 308 AR              = $(CROSS_COMPILE)ar
 309 NM              = $(CROSS_COMPILE)nm
 310 STRIP           = $(CROSS_COMPILE)strip
 311 OBJCOPY         = $(CROSS_COMPILE)objcopy
 312 OBJDUMP         = $(CROSS_COMPILE)objdump
 313 AWK             = awk
 314 GENKSYMS        = scripts/genksyms/genksyms
 315 DEPMOD          = /sbin/depmod
 316 KALLSYMS        = scripts/kallsyms
 317 PERL            = perl
 318 CHECK           = sparse
 319
 320 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 321 MODFLAGS        = -DMODULE
 322 CFLAGS_MODULE   = $(MODFLAGS)
 323 AFLAGS_MODULE   = $(MODFLAGS)
 324 LDFLAGS_MODULE  = -r
 325 CFLAGS_KERNEL   =
 326 AFLAGS_KERNEL   =
 327
 328
 329 # Use LINUXINCLUDE when you must reference the include/ directory.
 330 # Needed to be compatible with the O= option
 331 LINUXINCLUDE    := -Iinclude \
 332                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 333                    -include include/linux/autoconf.h
 334
 335 CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)
 336
 337 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 338                    -fno-strict-aliasing -fno-common \
 339                    -ffreestanding
 340 AFLAGS          := -D__ASSEMBLY__
 341
 342 # Read KERNELRELEASE from .kernelrelease (if it exists)
 343 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
 344 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 345
 346 export  VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
 347         ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 348         CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 349         HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 350
 351 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 352 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 353 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 354
 355 # When compiling out-of-tree modules, put MODVERDIR in the module
 356 # tree rather than in the kernel tree. The kernel tree might
 357 # even be read-only.
 358 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 359
 360 # Files to ignore in find ... statements
 361
 362 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
 363 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 364
 365 # ===========================================================================
 366 # Rules shared between *config targets and build targets
 367
 368 # Basic helpers built in scripts/
 369 .PHONY: scripts_basic
 370 scripts_basic:
 371         $(Q)$(MAKE) $(build)=scripts/basic
 372
 373 # To avoid any implicit rule to kick in, define an empty command.
 374 scripts/basic/%: scripts_basic ;
 375
 376 .PHONY: outputmakefile
 377 # outputmakefile generate a Makefile to be placed in output directory, if
 378 # using a seperate output directory. This allows convinient use
 379 # of make in output directory
 380 outputmakefile:
 381         $(Q)if test ! $(srctree) -ef $(objtree); then \
 382         $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile              \
 383             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)         \
 384             > $(objtree)/Makefile;                                 \
 385             echo '  GEN    $(objtree)/Makefile';                   \
 386         fi
 387
 388 # To make sure we do not include .config for any of the *config targets
 389 # catch them early, and hand them over to scripts/kconfig/Makefile
 390 # It is allowed to specify more targets when calling make, including
 391 # mixing *config targets and build targets.
 392 # For example 'make oldconfig all'.
 393 # Detect when mixed targets is specified, and make a second invocation
 394 # of make so .config is not included in this case either (for *config).
 395
 396 no-dot-config-targets := clean mrproper distclean \
 397                          cscope TAGS tags help %docs check%
 398
 399 config-targets := 0
 400 mixed-targets  := 0
 401 dot-config     := 1
 402
 403 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 404         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 405                 dot-config := 0
 406         endif
 407 endif
 408
 409 ifeq ($(KBUILD_EXTMOD),)
 410         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 411                 config-targets := 1
 412                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 413                         mixed-targets := 1
 414                 endif
 415         endif
 416 endif
 417
 418 ifeq ($(mixed-targets),1)
 419 # ===========================================================================
 420 # We're called with mixed targets (*config and build targets).
 421 # Handle them one by one.
 422
 423 %:: FORCE
 424         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 425
 426 else
 427 ifeq ($(config-targets),1)
 428 # ===========================================================================
 429 # *config targets only - make sure prerequisites are updated, and descend
 430 # in scripts/kconfig to make the *config target
 431
 432 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 433 # KBUILD_DEFCONFIG may point out an alternative default configuration
 434 # used for 'make defconfig'
 435 include $(srctree)/arch/$(ARCH)/Makefile
 436 export KBUILD_DEFCONFIG
 437
 438 config %config: scripts_basic outputmakefile FORCE
 439         $(Q)mkdir -p include/linux
 440         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 441         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
 442
 443 else
 444 # ===========================================================================
 445 # Build targets only - this includes vmlinux, arch specific targets, clean
 446 # targets and others. In general all targets except *config targets.
 447
 448 ifeq ($(KBUILD_EXTMOD),)
 449 # Additional helpers built in scripts/
 450 # Carefully list dependencies so we do not try to build scripts twice
 451 # in parrallel
 452 .PHONY: scripts
 453 scripts: scripts_basic include/config/MARKER
 454         $(Q)$(MAKE) $(build)=$(@)
 455
 456 scripts_basic: include/linux/autoconf.h
 457
 458 # Objects we will link into vmlinux / subdirs we need to visit
 459 init-y          := init/
 460 drivers-y       := drivers/ sound/
 461 net-y           := net/
 462 libs-y          := lib/
 463 core-y          := usr/
 464 endif # KBUILD_EXTMOD
 465
 466 ifeq ($(dot-config),1)
 467 # In this section, we need .config
 468
 469 # Read in dependencies to all Kconfig* files, make sure to run
 470 # oldconfig if changes are detected.
 471 -include .kconfig.d
 472
 473 include .config
 474
 475 # If .config needs to be updated, it will be done via the dependency
 476 # that autoconf has on .config.
 477 # To avoid any implicit rule to kick in, define an empty command
 478 .config .kconfig.d: ;
 479
 480 # If .config is newer than include/linux/autoconf.h, someone tinkered
 481 # with it and forgot to run make oldconfig.
 482 # If kconfig.d is missing then we are probarly in a cleaned tree so
 483 # we execute the config step to be sure to catch updated Kconfig files
 484 include/linux/autoconf.h: .kconfig.d .config
 485         $(Q)mkdir -p include/linux
 486         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 487 else
 488 # Dummy target needed, because used as prerequisite
 489 include/linux/autoconf.h: ;
 490 endif
 491
 492 # The all: target is the default when no target is given on the
 493 # command line.
 494 # This allow a user to issue only 'make' to build a kernel including modules
 495 # Defaults vmlinux but it is usually overriden in the arch makefile
 496 all: vmlinux
 497
 498 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 499 CFLAGS          += -Os
 500 else
 501 CFLAGS          += -O2
 502 endif
 503
 504 #Add align options if CONFIG_CC_* is not equal to 0
 505 add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
 506 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
 507 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
 508 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
 509 CFLAGS          += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
 510
 511 ifdef CONFIG_FRAME_POINTER
 512 CFLAGS          += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
 513 else
 514 CFLAGS          += -fomit-frame-pointer
 515 endif
 516
 517 ifdef CONFIG_DEBUG_INFO
 518 CFLAGS          += -g
 519 endif
 520
 521 include $(srctree)/arch/$(ARCH)/Makefile
 522
 523 # arch Makefile may override CC so keep this after arch Makefile is included
 524 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 525 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 526
 527 # warn about C99 declaration after statement
 528 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 529
 530 # disable pointer signedness warnings in gcc 4.0
 531 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 532
 533 # Default kernel image to build when no specific target is given.
 534 # KBUILD_IMAGE may be overruled on the commandline or
 535 # set in the environment
 536 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 537 # this default value
 538 export KBUILD_IMAGE ?= vmlinux
 539
 540 #
 541 # INSTALL_PATH specifies where to place the updated kernel and system map
 542 # images. Default is /boot, but you can set it to other values
 543 export  INSTALL_PATH ?= /boot
 544
 545 #
 546 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 547 # relocations required by build roots.  This is not defined in the
 548 # makefile but the arguement can be passed to make if needed.
 549 #
 550
 551 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 552 export MODLIB
 553
 554
 555 ifeq ($(KBUILD_EXTMOD),)
 556 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 557
 558 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 559                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 560                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 561
 562 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 563                      $(init-n) $(init-) \
 564                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 565                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 566
 567 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 568 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 569 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 570 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 571 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 572 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 573 libs-y          := $(libs-y1) $(libs-y2)
 574
 575 # Build vmlinux
 576 # ---------------------------------------------------------------------------
 577 # vmlinux is build from the objects selected by $(vmlinux-init) and
 578 # $(vmlinux-main). Most are built-in.o files from top-level directories
 579 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 580 # Ordering when linking is important, and $(vmlinux-init) must be first.
 581 #
 582 # vmlinux
 583 #   ^
 584 #   |
 585 #   +-< $(vmlinux-init)
 586 #   |   +--< init/version.o + more
 587 #   |
 588 #   +--< $(vmlinux-main)
 589 #   |    +--< driver/built-in.o mm/built-in.o + more
 590 #   |
 591 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 592 #
 593 # vmlinux version (uname -v) cannot be updated during normal
 594 # descending-into-subdirs phase since we do not yet know if we need to
 595 # update vmlinux.
 596 # Therefore this step is delayed until just before final link of vmlinux -
 597 # except in the kallsyms case where it is done just before adding the
 598 # symbols to the kernel.
 599 #
 600 # System.map is generated to document addresses of all kernel symbols
 601
 602 vmlinux-init := $(head-y) $(init-y)
 603 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 604 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 605 vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
 606
 607 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 608 # May be overridden by arch/$(ARCH)/Makefile
 609 quiet_cmd_vmlinux__ ?= LD      $@
 610       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 611       -T $(vmlinux-lds) $(vmlinux-init)                          \
 612       --start-group $(vmlinux-main) --end-group                  \
 613       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 614
 615 # Generate new vmlinux version
 616 quiet_cmd_vmlinux_version = GEN     .version
 617       cmd_vmlinux_version = set -e;                     \
 618         if [ ! -r .version ]; then                      \
 619           rm -f .version;                               \
 620           echo 1 >.version;                             \
 621         else                                            \
 622           mv .version .old_version;                     \
 623           expr 0$$(cat .old_version) + 1 >.version;     \
 624         fi;                                             \
 625         $(MAKE) $(build)=init
 626
 627 # Generate System.map
 628 quiet_cmd_sysmap = SYSMAP
 629       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 630
 631 # Link of vmlinux
 632 # If CONFIG_KALLSYMS is set .version is already updated
 633 # Generate System.map and verify that the content is consistent
 634 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 635 # First command is ':' to allow us to use + in front of the rule
 636 define rule_vmlinux__
 637         :
 638         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 639
 640         $(call cmd,vmlinux__)
 641         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 642
 643         $(Q)$(if $($(quiet)cmd_sysmap),                 \
 644           echo '  $($(quiet)cmd_sysmap) System.map' &&) \
 645         $(cmd_sysmap) $@ System.map;                    \
 646         if [ $$? -ne 0 ]; then                          \
 647                 rm -f $@;                               \
 648                 /bin/false;                             \
 649         fi;
 650         $(verify_kallsyms)
 651 endef
 652
 653
 654 ifdef CONFIG_KALLSYMS
 655 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 656 # It's a three stage process:
 657 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 658 #   empty
 659 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 660 #   the right size - vmlinux version (uname -v) is updated during this step
 661 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 662 #   but due to the added section, some addresses have shifted.
 663 #   From here, we generate a correct .tmp_kallsyms2.o
 664 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 665 # o Verify that the System.map from vmlinux matches the map from
 666 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 667 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 668 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 669 #   temporary bypass to allow the kernel to be built while the
 670 #   maintainers work out what went wrong with kallsyms.
 671
 672 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 673 last_kallsyms := 3
 674 else
 675 last_kallsyms := 2
 676 endif
 677
 678 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 679
 680 define verify_kallsyms
 681         $(Q)$(if $($(quiet)cmd_sysmap),                       \
 682           echo '  $($(quiet)cmd_sysmap) .tmp_System.map' &&)  \
 683           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 684         $(Q)cmp -s System.map .tmp_System.map ||              \
 685                 (echo Inconsistent kallsyms data;             \
 686                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
 687                  rm .tmp_kallsyms* ; /bin/false )
 688 endef
 689
 690 # Update vmlinux version before link
 691 # Use + in front of this rule to silent warning about make -j1
 692 # First command is ':' to allow us to use + in front of this rule
 693 cmd_ksym_ld = $(cmd_vmlinux__)
 694 define rule_ksym_ld
 695         :
 696         +$(call cmd,vmlinux_version)
 697         $(call cmd,vmlinux__)
 698         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 699 endef
 700
 701 # Generate .S file with all kernel symbols
 702 quiet_cmd_kallsyms = KSYM    $@
 703       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 704                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 705
 706 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 707         $(call if_changed_dep,as_o_S)
 708
 709 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 710         $(call cmd,kallsyms)
 711
 712 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 713 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 714         $(call if_changed_rule,ksym_ld)
 715
 716 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 717         $(call if_changed,vmlinux__)
 718
 719 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 720         $(call if_changed,vmlinux__)
 721
 722 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 723 $(KALLSYMS): scripts ;
 724
 725 # Generate some data for debugging strange kallsyms problems
 726 debug_kallsyms: .tmp_map$(last_kallsyms)
 727
 728 .tmp_map%: .tmp_vmlinux% FORCE
 729         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 730
 731 .tmp_map3: .tmp_map2
 732
 733 .tmp_map2: .tmp_map1
 734
 735 endif # ifdef CONFIG_KALLSYMS
 736
 737 # vmlinux image - including updated kernel symbols
 738 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 739         $(call if_changed_rule,vmlinux__)
 740         $(Q)rm -f .old_version
 741
 742 # The actual objects are generated when descending,
 743 # make sure no implicit rule kicks in
 744 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 745
 746 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 747 # Preset locale variables to speed up the build process. Limit locale
 748 # tweaks to this spot to avoid wrong language settings when running
 749 # make menuconfig etc.
 750 # Error messages still appears in the original language
 751
 752 .PHONY: $(vmlinux-dirs)
 753 $(vmlinux-dirs): prepare scripts
 754         $(Q)$(MAKE) $(build)=$@
 755
 756 # Build the kernel release string
 757 # The KERNELRELEASE is stored in a file named .kernelrelease
 758 # to be used when executing for example make install or make modules_install
 759 #
 760 # Take the contents of any files called localversion* and the config
 761 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
 762 # LOCALVERSION from the command line override all of this
 763
 764 nullstring :=
 765 space      := $(nullstring) # end of line
 766
 767 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 768 __localver  = $(sort $(wildcard $(___localver)))
 769 # skip backup files (containing '~')
 770 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 771
 772 localver = $(subst $(space),, \
 773            $(shell cat /dev/null $(_localver)) \
 774            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 775
 776 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 777 # and if the SCM is know a tag from the SCM is appended.
 778 # The appended tag is determinded by the SCM used.
 779 #
 780 # Currently, only git is supported.
 781 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 782 # checks as needed.
 783 ifdef CONFIG_LOCALVERSION_AUTO
 784         _localver-auto = $(shell $(CONFIG_SHELL) \
 785                           $(srctree)/scripts/setlocalversion $(srctree))
 786         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 787 endif
 788
 789 localver-full = $(localver)$(localver-auto)
 790
 791 # Store (new) KERNELRELASE string in .kernelrelease
 792 kernelrelease = $(KERNELVERSION)$(localver-full)
 793 .kernelrelease: FORCE
 794         $(Q)rm -f $@
 795         $(Q)echo $(kernelrelease) > $@
 796
 797
 798 # Things we need to do before we recursively start building the kernel
 799 # or the modules are listed in "prepare".
 800 # A multi level approach is used. prepareN is processed before prepareN-1.
 801 # archprepare is used in arch Makefiles and when processed asm symlink,
 802 # version.h and scripts_basic is processed / created.
 803
 804 # Listed in dependency order
 805 .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
 806
 807 # prepare-all is deprecated, use prepare as valid replacement
 808 .PHONY: prepare-all
 809
 810 # prepare3 is used to check if we are building in a separate output directory,
 811 # and if so do:
 812 # 1) Check that make has not been executed in the kernel src $(srctree)
 813 # 2) Create the include2 directory, used for the second asm symlink
 814 prepare3: .kernelrelease
 815 ifneq ($(KBUILD_SRC),)
 816         @echo '  Using $(srctree) as source for kernel'
 817         $(Q)if [ -f $(srctree)/.config ]; then \
 818                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 819                 echo "  in the '$(srctree)' directory.";\
 820                 /bin/false; \
 821         fi;
 822         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 823         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 824 endif
 825
 826 # prepare2 creates a makefile if using a separate output directory
 827 prepare2: prepare3 outputmakefile
 828
 829 prepare1: prepare2 include/linux/version.h include/asm \
 830                    include/config/MARKER
 831 ifneq ($(KBUILD_MODULES),)
 832         $(Q)rm -rf $(MODVERDIR)
 833         $(Q)mkdir -p $(MODVERDIR)
 834 endif
 835
 836 archprepare: prepare1 scripts_basic
 837
 838 prepare0: archprepare FORCE
 839         $(Q)$(MAKE) $(build)=.
 840
 841 # All the preparing..
 842 prepare prepare-all: prepare0
 843
 844 #       Leave this as default for preprocessing vmlinux.lds.S, which is now
 845 #       done in arch/$(ARCH)/kernel/Makefile
 846
 847 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 848
 849 # Single targets
 850 # ---------------------------------------------------------------------------
 851
 852 %.s: %.c scripts FORCE
 853         $(Q)$(MAKE) $(build)=$(@D) $@
 854 %.i: %.c scripts FORCE
 855         $(Q)$(MAKE) $(build)=$(@D) $@
 856 %.o: %.c scripts FORCE
 857         $(Q)$(MAKE) $(build)=$(@D) $@
 858 %.ko: scripts FORCE
 859         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
 860         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 861 %/:      scripts prepare FORCE
 862         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
 863 %.lst: %.c scripts FORCE
 864         $(Q)$(MAKE) $(build)=$(@D) $@
 865 %.s: %.S scripts FORCE
 866         $(Q)$(MAKE) $(build)=$(@D) $@
 867 %.o: %.S scripts FORCE
 868         $(Q)$(MAKE) $(build)=$(@D) $@
 869
 870 #       FIXME: The asm symlink changes when $(ARCH) changes. That's
 871 #       hard to detect, but I suppose "make mrproper" is a good idea
 872 #       before switching between archs anyway.
 873
 874 include/asm:
 875         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 876         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 877         @ln -fsn asm-$(ARCH) $@
 878
 879 #       Split autoconf.h into include/linux/config/*
 880
 881 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
 882         @echo '  SPLIT   include/linux/autoconf.h -> include/config/*'
 883         @scripts/basic/split-include include/linux/autoconf.h include/config
 884         @touch $@
 885
 886 # Generate some files
 887 # ---------------------------------------------------------------------------
 888
 889 # KERNELRELEASE can change from a few different places, meaning version.h
 890 # needs to be updated, so this check is forced on all builds
 891
 892 uts_len := 64
 893
 894 define filechk_version.h
 895         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 896           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 897           exit 1; \
 898         fi; \
 899         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
 900           echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
 901          echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
 902         )
 903 endef
 904
 905 include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
 906         $(call filechk,version.h)
 907
 908 # ---------------------------------------------------------------------------
 909
 910 .PHONY: depend dep
 911 depend dep:
 912         @echo '*** Warning: make $@ is unnecessary now.'
 913
 914 # ---------------------------------------------------------------------------
 915 # Modules
 916
 917 ifdef CONFIG_MODULES
 918
 919 #       By default, build modules as well
 920
 921 all: modules
 922
 923 #       Build modules
 924
 925 .PHONY: modules
 926 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
 927         @echo '  Building modules, stage 2.';
 928         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 929
 930
 931 # Target to prepare building external modules
 932 .PHONY: modules_prepare
 933 modules_prepare: prepare scripts
 934
 935 # Target to install modules
 936 .PHONY: modules_install
 937 modules_install: _modinst_ _modinst_post
 938
 939 .PHONY: _modinst_
 940 _modinst_:
 941         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 942                 echo "Warning: you may need to install module-init-tools"; \
 943                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 944                 sleep 1; \
 945         fi
 946         @rm -rf $(MODLIB)/kernel
 947         @rm -f $(MODLIB)/source
 948         @mkdir -p $(MODLIB)/kernel
 949         @ln -s $(srctree) $(MODLIB)/source
 950         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 951                 rm -f $(MODLIB)/build ; \
 952                 ln -s $(objtree) $(MODLIB)/build ; \
 953         fi
 954         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
 955
 956 # If System.map exists, run depmod.  This deliberately does not have a
 957 # dependency on System.map since that would run the dependency tree on
 958 # vmlinux.  This depmod is only for convenience to give the initial
 959 # boot a modules.dep even before / is mounted read-write.  However the
 960 # boot script depmod is the master version.
 961 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 962 depmod_opts     :=
 963 else
 964 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 965 endif
 966 .PHONY: _modinst_post
 967 _modinst_post: _modinst_
 968         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 969
 970 else # CONFIG_MODULES
 971
 972 # Modules not configured
 973 # ---------------------------------------------------------------------------
 974
 975 modules modules_install: FORCE
 976         @echo
 977         @echo "The present kernel configuration has modules disabled."
 978         @echo "Type 'make config' and enable loadable module support."
 979         @echo "Then build a kernel with module support enabled."
 980         @echo
 981         @exit 1
 982
 983 endif # CONFIG_MODULES
 984
 985 ###
 986 # Cleaning is done on three levels.
 987 # make clean     Delete most generated files
 988 #                Leave enough to build external modules
 989 # make mrproper  Delete the current configuration, and all generated files
 990 # make distclean Remove editor backup files, patch leftover files and the like
 991
 992 # Directories & files removed with 'make clean'
 993 CLEAN_DIRS  += $(MODVERDIR)
 994 CLEAN_FILES +=  vmlinux System.map \
 995                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
 996
 997 # Directories & files removed with 'make mrproper'
 998 MRPROPER_DIRS  += include/config include2
 999 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1000                   include/linux/autoconf.h include/linux/version.h \
1001                   .kernelrelease Module.symvers tags TAGS cscope*
1002
1003 # clean - Delete most, but leave enough to build external modules
1004 #
1005 clean: rm-dirs  := $(CLEAN_DIRS)
1006 clean: rm-files := $(CLEAN_FILES)
1007 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1008
1009 .PHONY: $(clean-dirs) clean archclean
1010 $(clean-dirs):
1011         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1012
1013 clean: archclean $(clean-dirs)
1014         $(call cmd,rmdirs)
1015         $(call cmd,rmfiles)
1016         @find . $(RCS_FIND_IGNORE) \
1017                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1018                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1019                 -type f -print | xargs rm -f
1020
1021 # mrproper - Delete all generated files, including .config
1022 #
1023 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1024 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1025 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1026
1027 .PHONY: $(mrproper-dirs) mrproper archmrproper
1028 $(mrproper-dirs):
1029         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1030
1031 mrproper: clean archmrproper $(mrproper-dirs)
1032         $(call cmd,rmdirs)
1033         $(call cmd,rmfiles)
1034
1035 # distclean
1036 #
1037 .PHONY: distclean
1038
1039 distclean: mrproper
1040         @find $(srctree) $(RCS_FIND_IGNORE) \
1041                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1042                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1043                 -o -name '.*.rej' -o -size 0 \
1044                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1045                 -type f -print | xargs rm -f
1046
1047
1048 # Packaging of the kernel to various formats
1049 # ---------------------------------------------------------------------------
1050 # rpm target kept for backward compatibility
1051 package-dir     := $(srctree)/scripts/package
1052
1053 .PHONY: %-pkg rpm
1054
1055 %pkg: FORCE
1056         $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1057 rpm: FORCE
1058         $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1059
1060
1061 # Brief documentation of the typical targets used
1062 # ---------------------------------------------------------------------------
1063
1064 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1065 boards := $(notdir $(boards))
1066
1067 help:
1068         @echo  'Cleaning targets:'
1069         @echo  '  clean           - remove most generated files but keep the config'
1070         @echo  '  mrproper        - remove all generated files + config + various backup files'
1071         @echo  ''
1072         @echo  'Configuration targets:'
1073         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1074         @echo  ''
1075         @echo  'Other generic targets:'
1076         @echo  '  all             - Build all targets marked with [*]'
1077         @echo  '* vmlinux         - Build the bare kernel'
1078         @echo  '* modules         - Build all modules'
1079         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1080         @echo  '  dir/            - Build all files in dir and below'
1081         @echo  '  dir/file.[ois]  - Build specified target only'
1082         @echo  '  dir/file.ko     - Build module including final link'
1083         @echo  '  rpm             - Build a kernel as an RPM package'
1084         @echo  '  tags/TAGS       - Generate tags file for editors'
1085         @echo  '  cscope          - Generate cscope index'
1086         @echo  '  kernelrelease   - Output the release version string'
1087         @echo  '  kernelversion   - Output the version stored in Makefile'
1088         @echo  ''
1089         @echo  'Static analysers'
1090         @echo  '  buildcheck      - List dangling references to vmlinux discarded sections'
1091         @echo  '                    and init sections from non-init sections'
1092         @echo  '  checkstack      - Generate a list of stack hogs'
1093         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1094         @echo  ''
1095         @echo  'Kernel packaging:'
1096         @$(MAKE) -f $(package-dir)/Makefile help
1097         @echo  ''
1098         @echo  'Documentation targets:'
1099         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1100         @echo  ''
1101         @echo  'Architecture specific targets ($(ARCH)):'
1102         @$(if $(archhelp),$(archhelp),\
1103                 echo '  No architecture specific help defined for $(ARCH)')
1104         @echo  ''
1105         @$(if $(boards), \
1106                 $(foreach b, $(boards), \
1107                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1108                 echo '')
1109
1110         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1111         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1112         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse)'
1113         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK (sparse)'
1114         @echo  ''
1115         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1116         @echo  'For further info see the ./README file'
1117
1118
1119 # Documentation targets
1120 # ---------------------------------------------------------------------------
1121 %docs: scripts_basic FORCE
1122         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1123
1124 else # KBUILD_EXTMOD
1125
1126 ###
1127 # External module support.
1128 # When building external modules the kernel used as basis is considered
1129 # read-only, and no consistency checks are made and the make
1130 # system is not used on the basis kernel. If updates are required
1131 # in the basis kernel ordinary make commands (without M=...) must
1132 # be used.
1133 #
1134 # The following are the only valid targets when building external
1135 # modules.
1136 # make M=dir clean     Delete all automatically generated files
1137 # make M=dir modules   Make all modules in specified dir
1138 # make M=dir           Same as 'make M=dir modules'
1139 # make M=dir modules_install
1140 #                      Install the modules build in the module directory
1141 #                      Assumes install directory is already created
1142
1143 # We are always building modules
1144 KBUILD_MODULES := 1
1145 .PHONY: crmodverdir
1146 crmodverdir:
1147         $(Q)mkdir -p $(MODVERDIR)
1148
1149 .PHONY: $(objtree)/Module.symvers
1150 $(objtree)/Module.symvers:
1151         @test -e $(objtree)/Module.symvers || ( \
1152         echo; \
1153         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1154         echo "           is missing; modules will have no dependencies and modversions."; \
1155         echo )
1156
1157 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1158 .PHONY: $(module-dirs) modules
1159 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1160         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1161
1162 modules: $(module-dirs)
1163         @echo '  Building modules, stage 2.';
1164         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1165
1166 .PHONY: modules_install
1167 modules_install:
1168         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1169
1170 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1171
1172 .PHONY: $(clean-dirs) clean
1173 $(clean-dirs):
1174         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1175
1176 clean:  rm-dirs := $(MODVERDIR)
1177 clean: $(clean-dirs)
1178         $(call cmd,rmdirs)
1179         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1180                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1181                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1182                 -type f -print | xargs rm -f
1183
1184 help:
1185         @echo  '  Building external modules.'
1186         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1187         @echo  ''
1188         @echo  '  modules         - default target, build the module(s)'
1189         @echo  '  modules_install - install the module'
1190         @echo  '  clean           - remove generated files in module directory only'
1191         @echo  ''
1192 endif # KBUILD_EXTMOD
1193
1194 # Generate tags for editors
1195 # ---------------------------------------------------------------------------
1196
1197 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1198 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1199 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1200
1201 ifeq ($(src),$(obj))
1202 __srctree =
1203 else
1204 __srctree = $(srctree)/
1205 endif
1206
1207 ifeq ($(ALLSOURCE_ARCHS),)
1208 ifeq ($(ARCH),um)
1209 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1210 else
1211 ALLINCLUDE_ARCHS := $(ARCH)
1212 endif
1213 else
1214 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1215 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1216 endif
1217
1218 ALLSOURCE_ARCHS := $(ARCH)
1219
1220 define all-sources
1221         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1222                \( -name include -o -name arch \) -prune -o \
1223                -name '*.[chS]' -print; \
1224           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1225                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1226                     -name '*.[chS]' -print; \
1227           done ; \
1228           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1229                -name '*.[chS]' -print; \
1230           find $(__srctree)include $(RCS_FIND_IGNORE) \
1231                \( -name config -o -name 'asm-*' \) -prune \
1232                -o -name '*.[chS]' -print; \
1233           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1234                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1235                     -name '*.[chS]' -print; \
1236           done ; \
1237           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1238                -name '*.[chS]' -print )
1239 endef
1240
1241 quiet_cmd_cscope-file = FILELST cscope.files
1242       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1243
1244 quiet_cmd_cscope = MAKE    cscope.out
1245       cmd_cscope = cscope -b
1246
1247 cscope: FORCE
1248         $(call cmd,cscope-file)
1249         $(call cmd,cscope)
1250
1251 quiet_cmd_TAGS = MAKE   $@
1252 define cmd_TAGS
1253         rm -f $@; \
1254         ETAGSF=`etags --version | grep -i exuberant >/dev/null &&     \
1255                 echo "-I __initdata,__exitdata,__acquires,__releases  \
1256                       -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1257                       --extra=+f --c-kinds=+px"`;                     \
1258                 $(all-sources) | xargs etags $$ETAGSF -a
1259 endef
1260
1261 TAGS: FORCE
1262         $(call cmd,TAGS)
1263
1264
1265 quiet_cmd_tags = MAKE   $@
1266 define cmd_tags
1267         rm -f $@; \
1268         CTAGSF=`ctags --version | grep -i exuberant >/dev/null &&     \
1269                 echo "-I __initdata,__exitdata,__acquires,__releases  \
1270                       -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1271                       --extra=+f --c-kinds=+px"`;                     \
1272                 $(all-sources) | xargs ctags $$CTAGSF -a
1273 endef
1274
1275 tags: FORCE
1276         $(call cmd,tags)
1277
1278
1279 # Scripts to check various things for consistency
1280 # ---------------------------------------------------------------------------
1281
1282 includecheck:
1283         find * $(RCS_FIND_IGNORE) \
1284                 -name '*.[hcS]' -type f -print | sort \
1285                 | xargs $(PERL) -w scripts/checkincludes.pl
1286
1287 versioncheck:
1288         find * $(RCS_FIND_IGNORE) \
1289                 -name '*.[hcS]' -type f -print | sort \
1290                 | xargs $(PERL) -w scripts/checkversion.pl
1291
1292 buildcheck:
1293         $(PERL) $(srctree)/scripts/reference_discarded.pl
1294         $(PERL) $(srctree)/scripts/reference_init.pl
1295
1296 namespacecheck:
1297         $(PERL) $(srctree)/scripts/namespace.pl
1298
1299 endif #ifeq ($(config-targets),1)
1300 endif #ifeq ($(mixed-targets),1)
1301
1302 .PHONY: checkstack
1303 checkstack:
1304         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1305         $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1306
1307 kernelrelease:
1308         $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1309         $(error kernelrelease not valid - run 'make *config' to update it))
1310 kernelversion:
1311         @echo $(KERNELVERSION)
1312
1313 # FIXME Should go into a make.lib or something
1314 # ===========================================================================
1315
1316 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1317       cmd_rmdirs = rm -rf $(rm-dirs)
1318
1319 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1320       cmd_rmfiles = rm -f $(rm-files)
1321
1322
1323 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1324           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1325           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1326
1327 quiet_cmd_as_o_S = AS      $@
1328 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1329
1330 # read all saved command lines
1331
1332 targets := $(wildcard $(sort $(targets)))
1333 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1334
1335 ifneq ($(cmd_files),)
1336   $(cmd_files): ;       # Do not try to update included dependency files
1337   include $(cmd_files)
1338 endif
1339
1340 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1341 # Usage:
1342 # $(Q)$(MAKE) $(clean)=dir
1343 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1344
1345 endif   # skip-makefile
1346
1347 FORCE: