Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 19
   4 EXTRAVERSION =
   5 EXTRAVERSION = -uc1
   6 NAME=Avast! A bilge rat!
   7
   8 # *DOCUMENTATION*
   9 # To see a list of typical targets execute "make help"
  10 # More info can be located in ./README
  11 # Comments in this file are targeted only to the developer, do not
  12 # expect to learn how to build the kernel reading this file.
  13
  14 # Do not print "Entering directory ..."
  15 MAKEFLAGS += --no-print-directory
  16
  17 # We are using a recursive build, so we need to do a little thinking
  18 # to get the ordering right.
  19 #
  20 # Most importantly: sub-Makefiles should only ever modify files in
  21 # their own directory. If in some directory we have a dependency on
  22 # a file in another dir (which doesn't happen often, but it's often
  23 # unavoidable when linking the built-in.o targets which finally
  24 # turn into vmlinux), we will call a sub make in that other dir, and
  25 # after that we are sure that everything which is in that other dir
  26 # is now up to date.
  27 #
  28 # The only cases where we need to modify files which have global
  29 # effects are thus separated out and done before the recursive
  30 # descending is started. They are now explicitly listed as the
  31 # prepare rule.
  32
  33 # To put more focus on warnings, be less verbose as default
  34 # Use 'make V=1' to see the full commands
  35
  36 ifdef V
  37   ifeq ("$(origin V)", "command line")
  38     KBUILD_VERBOSE = $(V)
  39   endif
  40 endif
  41 ifndef KBUILD_VERBOSE
  42   KBUILD_VERBOSE = 0
  43 endif
  44
  45 # Call a source code checker (by default, "sparse") as part of the
  46 # C compilation.
  47 #
  48 # Use 'make C=1' to enable checking of only re-compiled files.
  49 # Use 'make C=2' to enable checking of *all* source files, regardless
  50 # of whether they are re-compiled or not.
  51 #
  52 # See the file "Documentation/sparse.txt" for more details, including
  53 # where to get the "sparse" utility.
  54
  55 ifdef C
  56   ifeq ("$(origin C)", "command line")
  57     KBUILD_CHECKSRC = $(C)
  58   endif
  59 endif
  60 ifndef KBUILD_CHECKSRC
  61   KBUILD_CHECKSRC = 0
  62 endif
  63
  64 # Use make M=dir to specify directory of external module to build
  65 # Old syntax make ... SUBDIRS=$PWD is still supported
  66 # Setting the environment variable KBUILD_EXTMOD take precedence
  67 ifdef SUBDIRS
  68   KBUILD_EXTMOD ?= $(SUBDIRS)
  69 endif
  70 ifdef M
  71   ifeq ("$(origin M)", "command line")
  72     KBUILD_EXTMOD := $(M)
  73   endif
  74 endif
  75
  76
  77 # kbuild supports saving output files in a separate directory.
  78 # To locate output files in a separate directory two syntaxes are supported.
  79 # In both cases the working directory must be the root of the kernel src.
  80 # 1) O=
  81 # Use "make O=dir/to/store/output/files/"
  82 #
  83 # 2) Set KBUILD_OUTPUT
  84 # Set the environment variable KBUILD_OUTPUT to point to the directory
  85 # where the output files shall be placed.
  86 # export KBUILD_OUTPUT=dir/to/store/output/files/
  87 # make
  88 #
  89 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  90 # variable.
  91
  92
  93 # KBUILD_SRC is set on invocation of make in OBJ directory
  94 # KBUILD_SRC is not intended to be used by the regular user (for now)
  95 ifeq ($(KBUILD_SRC),)
  96
  97 # OK, Make called in directory where kernel src resides
  98 # Do we want to locate output files in a separate directory?
  99 ifdef O
 100   ifeq ("$(origin O)", "command line")
 101     KBUILD_OUTPUT := $(O)
 102   endif
 103 endif
 104
 105 # That's our default target when none is given on the command line
 106 PHONY := _all
 107 _all:
 108
 109 ifneq ($(KBUILD_OUTPUT),)
 110 # Invoke a second make in the output directory, passing relevant variables
 111 # check that the output directory actually exists
 112 saved-output := $(KBUILD_OUTPUT)
 113 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 114 $(if $(KBUILD_OUTPUT),, \
 115      $(error output directory "$(saved-output)" does not exist))
 116
 117 PHONY += $(MAKECMDGOALS)
 118
 119 $(filter-out _all,$(MAKECMDGOALS)) _all:
 120         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 121         KBUILD_SRC=$(CURDIR) \
 122         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
 123
 124 # Leave processing to above invocation of make
 125 skip-makefile := 1
 126 endif # ifneq ($(KBUILD_OUTPUT),)
 127 endif # ifeq ($(KBUILD_SRC),)
 128
 129 # We process the rest of the Makefile if this is the final invocation of make
 130 ifeq ($(skip-makefile),)
 131
 132 # If building an external module we do not care about the all: rule
 133 # but instead _all depend on modules
 134 PHONY += all
 135 ifeq ($(KBUILD_EXTMOD),)
 136 _all: all
 137 else
 138 _all: modules
 139 endif
 140
 141 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 142 TOPDIR          := $(srctree)
 143 # FIXME - TOPDIR is obsolete, use srctree/objtree
 144 objtree         := $(CURDIR)
 145 src             := $(srctree)
 146 obj             := $(objtree)
 147
 148 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 149
 150 export srctree objtree VPATH TOPDIR
 151
 152
 153 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 154 # first, and if a usermode build is happening, the "ARCH=um" on the command
 155 # line overrides the setting of ARCH below.  If a native build is happening,
 156 # then ARCH is assigned, getting whatever value it gets normally, and
 157 # SUBARCH is subsequently ignored.
 158
 159 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 160                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 161                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 162                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
 163
 164 # Cross compiling and selecting different set of gcc/bin-utils
 165 # ---------------------------------------------------------------------------
 166 #
 167 # When performing cross compilation for other architectures ARCH shall be set
 168 # to the target architecture. (See arch/* for the possibilities).
 169 # ARCH can be set during invocation of make:
 170 # make ARCH=ia64
 171 # Another way is to have ARCH set in the environment.
 172 # The default ARCH is the host where make is executed.
 173
 174 # CROSS_COMPILE specify the prefix used for all executables used
 175 # during compilation. Only gcc and related bin-utils executables
 176 # are prefixed with $(CROSS_COMPILE).
 177 # CROSS_COMPILE can be set on the command line
 178 # make CROSS_COMPILE=ia64-linux-
 179 # Alternatively CROSS_COMPILE can be set in the environment.
 180 # Default value for CROSS_COMPILE is not to prefix executables
 181 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 182
 183 ARCH            ?= $(SUBARCH)
 184 CROSS_COMPILE   ?=
 185
 186 # Architecture as present in compile.h
 187 UTS_MACHINE := $(ARCH)
 188
 189 KCONFIG_CONFIG  ?= .config
 190
 191 # SHELL used by kbuild
 192 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 193           else if [ -x /bin/bash ]; then echo /bin/bash; \
 194           else echo sh; fi ; fi)
 195
 196 HOSTCC       = gcc
 197 HOSTCXX      = g++
 198 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 199 HOSTCXXFLAGS = -O2
 200
 201 # Decide whether to build built-in, modular, or both.
 202 # Normally, just do built-in.
 203
 204 KBUILD_MODULES :=
 205 KBUILD_BUILTIN := 1
 206
 207 #       If we have only "make modules", don't compile built-in objects.
 208 #       When we're building modules with modversions, we need to consider
 209 #       the built-in objects during the descend as well, in order to
 210 #       make sure the checksums are up to date before we record them.
 211
 212 ifeq ($(MAKECMDGOALS),modules)
 213   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 214 endif
 215
 216 #       If we have "make <whatever> modules", compile modules
 217 #       in addition to whatever we do anyway.
 218 #       Just "make" or "make all" shall build modules as well
 219
 220 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 221   KBUILD_MODULES := 1
 222 endif
 223
 224 ifeq ($(MAKECMDGOALS),)
 225   KBUILD_MODULES := 1
 226 endif
 227
 228 export KBUILD_MODULES KBUILD_BUILTIN
 229 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 230
 231 # Beautify output
 232 # ---------------------------------------------------------------------------
 233 #
 234 # Normally, we echo the whole command before executing it. By making
 235 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 236 # $(quiet) to choose other forms of output instead, e.g.
 237 #
 238 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 239 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 240 #
 241 # If $(quiet) is empty, the whole command will be printed.
 242 # If it is set to "quiet_", only the short version will be printed.
 243 # If it is set to "silent_", nothing will be printed at all, since
 244 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 245 #
 246 # A simple variant is to prefix commands with $(Q) - that's useful
 247 # for commands that shall be hidden in non-verbose mode.
 248 #
 249 #       $(Q)ln $@ :<
 250 #
 251 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 252 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 253
 254 ifeq ($(KBUILD_VERBOSE),1)
 255   quiet =
 256   Q =
 257 else
 258   quiet=quiet_
 259   Q = @
 260 endif
 261
 262 # If the user is running make -s (silent mode), suppress echoing of
 263 # commands
 264
 265 ifneq ($(findstring s,$(MAKEFLAGS)),)
 266   quiet=silent_
 267 endif
 268
 269 export quiet Q KBUILD_VERBOSE
 270
 271
 272 # Look for make include files relative to root of kernel src
 273 MAKEFLAGS += --include-dir=$(srctree)
 274
 275 # We need some generic definitions
 276 include  $(srctree)/scripts/Kbuild.include
 277
 278 # Do not use make's built-in rules and variables
 279 # This increases performance and avoid hard-to-debug behavour
 280 MAKEFLAGS += -rR
 281
 282 # Make variables (CC, etc...)
 283
 284 AS              = $(CROSS_COMPILE)as
 285 LD              = $(CROSS_COMPILE)ld
 286 CC              = $(CROSS_COMPILE)gcc
 287 CPP             = $(CC) -E
 288 AR              = $(CROSS_COMPILE)ar
 289 NM              = $(CROSS_COMPILE)nm
 290 STRIP           = $(CROSS_COMPILE)strip
 291 OBJCOPY         = $(CROSS_COMPILE)objcopy
 292 OBJDUMP         = $(CROSS_COMPILE)objdump
 293 AWK             = awk
 294 GENKSYMS        = scripts/genksyms/genksyms
 295 DEPMOD          = /sbin/depmod
 296 KALLSYMS        = scripts/kallsyms
 297 PERL            = perl
 298 CHECK           = sparse
 299
 300 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 301 MODFLAGS        = -DMODULE
 302 CFLAGS_MODULE   = $(MODFLAGS)
 303 AFLAGS_MODULE   = $(MODFLAGS)
 304 LDFLAGS_MODULE  = -r
 305 CFLAGS_KERNEL   =
 306 AFLAGS_KERNEL   =
 307
 308
 309 # Use LINUXINCLUDE when you must reference the include/ directory.
 310 # Needed to be compatible with the O= option
 311 LINUXINCLUDE    := -Iinclude \
 312                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 313                    -include include/linux/autoconf.h
 314
 315 CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)
 316
 317 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 318                    -fno-strict-aliasing -fno-common
 319 AFLAGS          := -D__ASSEMBLY__
 320
 321 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 322 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 323 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 324
 325 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 326 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 327 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 328 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 329
 330 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 331 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 332 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 333
 334 # When compiling out-of-tree modules, put MODVERDIR in the module
 335 # tree rather than in the kernel tree. The kernel tree might
 336 # even be read-only.
 337 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 338
 339 # Files to ignore in find ... statements
 340
 341 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
 342 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 343
 344 # ===========================================================================
 345 # Rules shared between *config targets and build targets
 346
 347 # Basic helpers built in scripts/
 348 PHONY += scripts_basic
 349 scripts_basic:
 350         $(Q)$(MAKE) $(build)=scripts/basic
 351
 352 # To avoid any implicit rule to kick in, define an empty command.
 353 scripts/basic/%: scripts_basic ;
 354
 355 PHONY += outputmakefile
 356 # outputmakefile generates a Makefile in the output directory, if using a
 357 # separate output directory. This allows convenient use of make in the
 358 # output directory.
 359 outputmakefile:
 360 ifneq ($(KBUILD_SRC),)
 361         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 362             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 363 endif
 364
 365 # To make sure we do not include .config for any of the *config targets
 366 # catch them early, and hand them over to scripts/kconfig/Makefile
 367 # It is allowed to specify more targets when calling make, including
 368 # mixing *config targets and build targets.
 369 # For example 'make oldconfig all'.
 370 # Detect when mixed targets is specified, and make a second invocation
 371 # of make so .config is not included in this case either (for *config).
 372
 373 no-dot-config-targets := clean mrproper distclean \
 374                          cscope TAGS tags help %docs check% \
 375                          include/linux/version.h headers_% \
 376                          kernelrelease kernelversion
 377
 378 config-targets := 0
 379 mixed-targets  := 0
 380 dot-config     := 1
 381
 382 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 383         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 384                 dot-config := 0
 385         endif
 386 endif
 387
 388 ifeq ($(KBUILD_EXTMOD),)
 389         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 390                 config-targets := 1
 391                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 392                         mixed-targets := 1
 393                 endif
 394         endif
 395 endif
 396
 397 ifeq ($(mixed-targets),1)
 398 # ===========================================================================
 399 # We're called with mixed targets (*config and build targets).
 400 # Handle them one by one.
 401
 402 %:: FORCE
 403         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 404
 405 else
 406 ifeq ($(config-targets),1)
 407 # ===========================================================================
 408 # *config targets only - make sure prerequisites are updated, and descend
 409 # in scripts/kconfig to make the *config target
 410
 411 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 412 # KBUILD_DEFCONFIG may point out an alternative default configuration
 413 # used for 'make defconfig'
 414 include $(srctree)/arch/$(ARCH)/Makefile
 415 export KBUILD_DEFCONFIG
 416
 417 config %config: scripts_basic outputmakefile FORCE
 418         $(Q)mkdir -p include/linux include/config
 419         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 420
 421 else
 422 # ===========================================================================
 423 # Build targets only - this includes vmlinux, arch specific targets, clean
 424 # targets and others. In general all targets except *config targets.
 425
 426 ifeq ($(KBUILD_EXTMOD),)
 427 # Additional helpers built in scripts/
 428 # Carefully list dependencies so we do not try to build scripts twice
 429 # in parallel
 430 PHONY += scripts
 431 scripts: scripts_basic include/config/auto.conf
 432         $(Q)$(MAKE) $(build)=$(@)
 433
 434 # Objects we will link into vmlinux / subdirs we need to visit
 435 init-y          := init/
 436 drivers-y       := drivers/ sound/
 437 net-y           := net/
 438 libs-y          := lib/
 439 core-y          := usr/
 440 endif # KBUILD_EXTMOD
 441
 442 ifeq ($(dot-config),1)
 443 # Read in config
 444 -include include/config/auto.conf
 445
 446 ifeq ($(KBUILD_EXTMOD),)
 447 # Read in dependencies to all Kconfig* files, make sure to run
 448 # oldconfig if changes are detected.
 449 -include include/config/auto.conf.cmd
 450
 451 # To avoid any implicit rule to kick in, define an empty command
 452 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 453
 454 # If .config is newer than include/config/auto.conf, someone tinkered
 455 # with it and forgot to run make oldconfig.
 456 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 457 # we execute the config step to be sure to catch updated Kconfig files
 458 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 459         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 460 else
 461 # external modules needs include/linux/autoconf.h and include/config/auto.conf
 462 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 463 PHONY += include/config/auto.conf
 464
 465 include/config/auto.conf:
 466         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 467         echo;                                                           \
 468         echo "  ERROR: Kernel configuration is invalid.";               \
 469         echo "         include/linux/autoconf.h or $@ are missing.";    \
 470         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 471         echo;                                                           \
 472         /bin/false)
 473
 474 endif # KBUILD_EXTMOD
 475
 476 else
 477 # Dummy target needed, because used as prerequisite
 478 include/config/auto.conf: ;
 479 endif # $(dot-config)
 480
 481 # The all: target is the default when no target is given on the
 482 # command line.
 483 # This allow a user to issue only 'make' to build a kernel including modules
 484 # Defaults vmlinux but it is usually overridden in the arch makefile
 485 all: vmlinux
 486
 487 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 488 CFLAGS          += -Os
 489 else
 490 CFLAGS          += -O2
 491 endif
 492
 493 include $(srctree)/arch/$(ARCH)/Makefile
 494
 495 ifdef CONFIG_FRAME_POINTER
 496 CFLAGS          += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
 497 else
 498 CFLAGS          += -fomit-frame-pointer
 499 endif
 500
 501 ifdef CONFIG_UNWIND_INFO
 502 CFLAGS          += -fasynchronous-unwind-tables
 503 LDFLAGS_vmlinux += --eh-frame-hdr
 504 endif
 505
 506 ifdef CONFIG_DEBUG_INFO
 507 CFLAGS          += -g
 508 endif
 509
 510 # Force gcc to behave correct even for buggy distributions
 511 CFLAGS          += $(call cc-option, -fno-stack-protector)
 512
 513 # arch Makefile may override CC so keep this after arch Makefile is included
 514 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 515 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 516
 517 # warn about C99 declaration after statement
 518 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 519
 520 # disable pointer signed / unsigned warnings in gcc 4.0
 521 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 522
 523 # Default kernel image to build when no specific target is given.
 524 # KBUILD_IMAGE may be overruled on the command line or
 525 # set in the environment
 526 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 527 # this default value
 528 export KBUILD_IMAGE ?= vmlinux
 529
 530 #
 531 # INSTALL_PATH specifies where to place the updated kernel and system map
 532 # images. Default is /boot, but you can set it to other values
 533 export  INSTALL_PATH ?= /boot
 534
 535 #
 536 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 537 # relocations required by build roots.  This is not defined in the
 538 # makefile but the argument can be passed to make if needed.
 539 #
 540
 541 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 542 export MODLIB
 543
 544 #
 545 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 546 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 547 #  the default option --strip-debug will be used.  Otherwise,
 548 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 549
 550 ifdef INSTALL_MOD_STRIP
 551 ifeq ($(INSTALL_MOD_STRIP),1)
 552 mod_strip_cmd = $(STRIP) --strip-debug
 553 else
 554 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 555 endif # INSTALL_MOD_STRIP=1
 556 else
 557 mod_strip_cmd = true
 558 endif # INSTALL_MOD_STRIP
 559 export mod_strip_cmd
 560
 561
 562 ifeq ($(KBUILD_EXTMOD),)
 563 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 564
 565 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 566                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 567                      $(net-y) $(net-m) $(libs-y) $(libs-m) $(EXTRA_MODULE_DIRS)))
 568
 569 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 570                      $(init-n) $(init-) \
 571                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 572                      $(net-n)  $(net-)  $(libs-n)    $(libs-) $(EXTRA_MODULE_DIRS))))
 573
 574 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 575 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 576 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 577 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 578 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 579 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 580 libs-y          := $(libs-y1) $(libs-y2)
 581
 582 # Build vmlinux
 583 # ---------------------------------------------------------------------------
 584 # vmlinux is built from the objects selected by $(vmlinux-init) and
 585 # $(vmlinux-main). Most are built-in.o files from top-level directories
 586 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 587 # Ordering when linking is important, and $(vmlinux-init) must be first.
 588 #
 589 # vmlinux
 590 #   ^
 591 #   |
 592 #   +-< $(vmlinux-init)
 593 #   |   +--< init/version.o + more
 594 #   |
 595 #   +--< $(vmlinux-main)
 596 #   |    +--< driver/built-in.o mm/built-in.o + more
 597 #   |
 598 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 599 #
 600 # vmlinux version (uname -v) cannot be updated during normal
 601 # descending-into-subdirs phase since we do not yet know if we need to
 602 # update vmlinux.
 603 # Therefore this step is delayed until just before final link of vmlinux -
 604 # except in the kallsyms case where it is done just before adding the
 605 # symbols to the kernel.
 606 #
 607 # System.map is generated to document addresses of all kernel symbols
 608
 609 vmlinux-init := $(head-y) $(init-y)
 610 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 611 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 612 vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
 613
 614 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 615 # May be overridden by arch/$(ARCH)/Makefile
 616 quiet_cmd_vmlinux__ ?= LD      $@
 617       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 618       -T $(vmlinux-lds) $(vmlinux-init)                          \
 619       --start-group $(vmlinux-main) --end-group                  \
 620       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 621
 622 # Generate new vmlinux version
 623 quiet_cmd_vmlinux_version = GEN     .version
 624       cmd_vmlinux_version = set -e;                     \
 625         if [ ! -r .version ]; then                      \
 626           rm -f .version;                               \
 627           echo 1 >.version;                             \
 628         else                                            \
 629           mv .version .old_version;                     \
 630           expr 0$$(cat .old_version) + 1 >.version;     \
 631         fi;                                             \
 632         $(MAKE) $(build)=init
 633
 634 # Generate System.map
 635 quiet_cmd_sysmap = SYSMAP
 636       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 637
 638 # Link of vmlinux
 639 # If CONFIG_KALLSYMS is set .version is already updated
 640 # Generate System.map and verify that the content is consistent
 641 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 642 # First command is ':' to allow us to use + in front of the rule
 643 define rule_vmlinux__
 644         :
 645         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 646
 647         $(call cmd,vmlinux__)
 648         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 649
 650         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 651           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 652         $(cmd_sysmap) $@ System.map;                                         \
 653         if [ $$? -ne 0 ]; then                                               \
 654                 rm -f $@;                                                    \
 655                 /bin/false;                                                  \
 656         fi;
 657         $(verify_kallsyms)
 658 endef
 659
 660
 661 ifdef CONFIG_KALLSYMS
 662 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 663 # It's a three stage process:
 664 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 665 #   empty
 666 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 667 #   the right size - vmlinux version (uname -v) is updated during this step
 668 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 669 #   but due to the added section, some addresses have shifted.
 670 #   From here, we generate a correct .tmp_kallsyms2.o
 671 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 672 # o Verify that the System.map from vmlinux matches the map from
 673 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 674 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 675 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 676 #   temporary bypass to allow the kernel to be built while the
 677 #   maintainers work out what went wrong with kallsyms.
 678
 679 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 680 last_kallsyms := 3
 681 else
 682 last_kallsyms := 2
 683 endif
 684
 685 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 686
 687 define verify_kallsyms
 688         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 689           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 690           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 691         $(Q)cmp -s System.map .tmp_System.map ||                             \
 692                 (echo Inconsistent kallsyms data;                            \
 693                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 694                  rm .tmp_kallsyms* ; /bin/false )
 695 endef
 696
 697 # Update vmlinux version before link
 698 # Use + in front of this rule to silent warning about make -j1
 699 # First command is ':' to allow us to use + in front of this rule
 700 cmd_ksym_ld = $(cmd_vmlinux__)
 701 define rule_ksym_ld
 702         :
 703         +$(call cmd,vmlinux_version)
 704         $(call cmd,vmlinux__)
 705         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 706 endef
 707
 708 # Generate .S file with all kernel symbols
 709 quiet_cmd_kallsyms = KSYM    $@
 710       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 711                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 712
 713 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 714         $(call if_changed_dep,as_o_S)
 715
 716 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 717         $(call cmd,kallsyms)
 718
 719 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 720 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 721         $(call if_changed_rule,ksym_ld)
 722
 723 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 724         $(call if_changed,vmlinux__)
 725
 726 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 727         $(call if_changed,vmlinux__)
 728
 729 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 730 $(KALLSYMS): scripts ;
 731
 732 # Generate some data for debugging strange kallsyms problems
 733 debug_kallsyms: .tmp_map$(last_kallsyms)
 734
 735 .tmp_map%: .tmp_vmlinux% FORCE
 736         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 737
 738 .tmp_map3: .tmp_map2
 739
 740 .tmp_map2: .tmp_map1
 741
 742 endif # ifdef CONFIG_KALLSYMS
 743
 744 # vmlinux image - including updated kernel symbols
 745 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 746 ifdef CONFIG_HEADERS_CHECK
 747         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 748 endif
 749         $(call if_changed_rule,vmlinux__)
 750         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 751         $(Q)rm -f .old_version
 752
 753 # The actual objects are generated when descending,
 754 # make sure no implicit rule kicks in
 755 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 756
 757 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 758 # Preset locale variables to speed up the build process. Limit locale
 759 # tweaks to this spot to avoid wrong language settings when running
 760 # make menuconfig etc.
 761 # Error messages still appears in the original language
 762
 763 PHONY += $(vmlinux-dirs)
 764 $(vmlinux-dirs): prepare scripts
 765         $(Q)$(MAKE) $(build)=$@
 766
 767 # Build the kernel release string
 768 #
 769 # The KERNELRELEASE value built here is stored in the file
 770 # include/config/kernel.release, and is used when executing several
 771 # make targets, such as "make install" or "make modules_install."
 772 #
 773 # The eventual kernel release string consists of the following fields,
 774 # shown in a hierarchical format to show how smaller parts are concatenated
 775 # to form the larger and final value, with values coming from places like
 776 # the Makefile, kernel config options, make command line options and/or
 777 # SCM tag information.
 778 #
 779 #       $(KERNELVERSION)
 780 #         $(VERSION)                    eg, 2
 781 #         $(PATCHLEVEL)                 eg, 6
 782 #         $(SUBLEVEL)                   eg, 18
 783 #         $(EXTRAVERSION)               eg, -rc6
 784 #       $(localver-full)
 785 #         $(localver)
 786 #           localversion*               (all localversion* files)
 787 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 788 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 789 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 790 #           $(LOCALVERSION)             (from make command line if provided)
 791 #
 792 #  Note how the final $(localver-auto) string is included *only* if the
 793 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 794 # moment, only git is supported but other SCMs can edit the script
 795 # scripts/setlocalversion and add the appropriate checks as needed.
 796
 797 nullstring :=
 798 space      := $(nullstring) # end of line
 799
 800 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 801 __localver  = $(sort $(wildcard $(___localver)))
 802 # skip backup files (containing '~')
 803 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 804
 805 localver = $(subst $(space),, \
 806            $(shell cat /dev/null $(_localver)) \
 807            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 808
 809 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 810 # and if the SCM is know a tag from the SCM is appended.
 811 # The appended tag is determined by the SCM used.
 812 #
 813 # Currently, only git is supported.
 814 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 815 # checks as needed.
 816 ifdef CONFIG_LOCALVERSION_AUTO
 817         _localver-auto = $(shell $(CONFIG_SHELL) \
 818                           $(srctree)/scripts/setlocalversion $(srctree))
 819         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 820 endif
 821
 822 localver-full = $(localver)$(localver-auto)
 823
 824 # Store (new) KERNELRELASE string in include/config/kernel.release
 825 kernelrelease = $(KERNELVERSION)$(localver-full)
 826 include/config/kernel.release: include/config/auto.conf FORCE
 827         $(Q)rm -f $@
 828         $(Q)echo $(kernelrelease) > $@
 829
 830
 831 # Things we need to do before we recursively start building the kernel
 832 # or the modules are listed in "prepare".
 833 # A multi level approach is used. prepareN is processed before prepareN-1.
 834 # archprepare is used in arch Makefiles and when processed asm symlink,
 835 # version.h and scripts_basic is processed / created.
 836
 837 # Listed in dependency order
 838 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 839
 840 # prepare-all is deprecated, use prepare as valid replacement
 841 PHONY += prepare-all
 842
 843 # prepare3 is used to check if we are building in a separate output directory,
 844 # and if so do:
 845 # 1) Check that make has not been executed in the kernel src $(srctree)
 846 # 2) Create the include2 directory, used for the second asm symlink
 847 prepare3: include/config/kernel.release
 848 ifneq ($(KBUILD_SRC),)
 849         @echo '  Using $(srctree) as source for kernel'
 850         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 851                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 852                 echo "  in the '$(srctree)' directory.";\
 853                 /bin/false; \
 854         fi;
 855         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 856         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 857 endif
 858
 859 # prepare2 creates a makefile if using a separate output directory
 860 prepare2: prepare3 outputmakefile
 861
 862 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 863                    include/asm include/config/auto.conf
 864 ifneq ($(KBUILD_MODULES),)
 865         $(Q)mkdir -p $(MODVERDIR)
 866         $(Q)rm -f $(MODVERDIR)/*
 867 endif
 868
 869 archprepare: prepare1 scripts_basic
 870
 871 prepare0: archprepare FORCE
 872         $(Q)$(MAKE) $(build)=.
 873
 874 # All the preparing..
 875 prepare prepare-all: prepare0
 876
 877 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 878 # done in arch/$(ARCH)/kernel/Makefile
 879
 880 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 881
 882 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 883 # hard to detect, but I suppose "make mrproper" is a good idea
 884 # before switching between archs anyway.
 885
 886 include/asm:
 887         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 888         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 889         @ln -fsn asm-$(ARCH) $@
 890
 891 # Generate some files
 892 # ---------------------------------------------------------------------------
 893
 894 # KERNELRELEASE can change from a few different places, meaning version.h
 895 # needs to be updated, so this check is forced on all builds
 896
 897 uts_len := 64
 898 define filechk_utsrelease.h
 899         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 900           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 901           exit 1;                                                         \
 902         fi;                                                               \
 903         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 904 endef
 905
 906 define filechk_version.h
 907         (echo \#define LINUX_VERSION_CODE $(shell                             \
 908         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 909         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 910 endef
 911
 912 include/linux/version.h: $(srctree)/Makefile FORCE
 913         $(call filechk,version.h)
 914
 915 include/linux/utsrelease.h: include/config/kernel.release FORCE
 916         $(call filechk,utsrelease.h)
 917
 918 # ---------------------------------------------------------------------------
 919
 920 PHONY += depend dep
 921 depend dep:
 922         @echo '*** Warning: make $@ is unnecessary now.'
 923
 924 # ---------------------------------------------------------------------------
 925 # Kernel headers
 926 INSTALL_HDR_PATH=$(objtree)/usr
 927 export INSTALL_HDR_PATH
 928
 929 HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
 930
 931 PHONY += headers_install_all
 932 headers_install_all: include/linux/version.h scripts_basic FORCE
 933         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 934         $(Q)for arch in $(HDRARCHES); do \
 935          $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
 936          done
 937
 938 PHONY += headers_install
 939 headers_install: include/linux/version.h scripts_basic FORCE
 940         @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
 941           echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
 942           exit 1 ; fi
 943         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 944         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
 945
 946 PHONY += headers_check
 947 headers_check: headers_install
 948         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
 949
 950 # ---------------------------------------------------------------------------
 951 # Modules
 952
 953 ifdef CONFIG_MODULES
 954
 955 # By default, build modules as well
 956
 957 all: modules
 958
 959 #       Build modules
 960
 961 PHONY += modules
 962 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
 963         @echo '  Building modules, stage 2.';
 964         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 965
 966
 967 # Target to prepare building external modules
 968 PHONY += modules_prepare
 969 modules_prepare: prepare scripts
 970
 971 # Target to install modules
 972 PHONY += modules_install
 973 modules_install: _modinst_ _modinst_post
 974
 975 PHONY += _modinst_
 976 _modinst_:
 977         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 978                 echo "Warning: you may need to install module-init-tools"; \
 979                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 980                 sleep 1; \
 981         fi
 982         @rm -rf $(MODLIB)/kernel
 983         @mkdir -p $(MODLIB)/kernel
 984         cd $(INSTALL_MOD_PATH)/lib/modules && ln -s $(KERNELRELEASE) 2.6.9-MoXaRt
 985         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 986                 rm -f $(MODLIB)/build ; \
 987                 ln -s $(objtree) $(MODLIB)/build ; \
 988         fi
 989         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 990
 991 # If System.map exists, run depmod.  This deliberately does not have a
 992 # dependency on System.map since that would run the dependency tree on
 993 # vmlinux.  This depmod is only for convenience to give the initial
 994 # boot a modules.dep even before / is mounted read-write.  However the
 995 # boot script depmod is the master version.
 996 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 997 depmod_opts     :=
 998 else
 999 depmod_opts     := -b $(INSTALL_MOD_PATH)/lib/modules -r
1000 endif
1001 PHONY += _modinst_post
1002 _modinst_post: _modinst_
1003         if [ -r System.map -a -x $(word 1, $(DEPMOD)) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1004
1005 else # CONFIG_MODULES
1006
1007 # Modules not configured
1008 # ---------------------------------------------------------------------------
1009
1010 modules modules_install: FORCE
1011         @echo
1012         @echo "The present kernel configuration has modules disabled."
1013         @echo "Type 'make config' and enable loadable module support."
1014         @echo "Then build a kernel with module support enabled."
1015         @echo
1016         @exit 1
1017
1018 endif # CONFIG_MODULES
1019
1020 ###
1021 # Cleaning is done on three levels.
1022 # make clean     Delete most generated files
1023 #                Leave enough to build external modules
1024 # make mrproper  Delete the current configuration, and all generated files
1025 # make distclean Remove editor backup files, patch leftover files and the like
1026
1027 # Directories & files removed with 'make clean'
1028 CLEAN_DIRS  += $(MODVERDIR)
1029 CLEAN_FILES +=  vmlinux System.map \
1030                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1031
1032 # Directories & files removed with 'make mrproper'
1033 MRPROPER_DIRS  += include/config include2 usr/include
1034 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1035                   include/linux/autoconf.h include/linux/version.h      \
1036                   include/linux/utsrelease.h                            \
1037                   Module.symvers tags TAGS cscope*
1038
1039 # clean - Delete most, but leave enough to build external modules
1040 #
1041 clean: rm-dirs  := $(CLEAN_DIRS)
1042 clean: rm-files := $(CLEAN_FILES)
1043 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1044
1045 PHONY += $(clean-dirs) clean archclean
1046 $(clean-dirs):
1047         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1048
1049 clean: archclean $(clean-dirs)
1050         $(call cmd,rmdirs)
1051         $(call cmd,rmfiles)
1052         @find . $(RCS_FIND_IGNORE) \
1053                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1054                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1055                 -o -name '*.symtypes' \) \
1056                 -type f -print | xargs rm -f
1057
1058 # mrproper - Delete all generated files, including .config
1059 #
1060 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1061 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1062 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1063
1064 PHONY += $(mrproper-dirs) mrproper archmrproper
1065 $(mrproper-dirs):
1066         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1067
1068 mrproper: clean archmrproper $(mrproper-dirs)
1069         $(call cmd,rmdirs)
1070         $(call cmd,rmfiles)
1071
1072 # distclean
1073 #
1074 PHONY += distclean
1075
1076 distclean: mrproper
1077         @find $(srctree) $(RCS_FIND_IGNORE) \
1078                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1079                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1080                 -o -name '.*.rej' -o -size 0 \
1081                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1082                 -type f -print | xargs rm -f
1083
1084
1085 # Packaging of the kernel to various formats
1086 # ---------------------------------------------------------------------------
1087 # rpm target kept for backward compatibility
1088 package-dir     := $(srctree)/scripts/package
1089
1090 %pkg: include/config/kernel.release FORCE
1091         $(Q)$(MAKE) $(build)=$(package-dir) $@
1092 rpm: include/config/kernel.release FORCE
1093         $(Q)$(MAKE) $(build)=$(package-dir) $@
1094
1095
1096 # Brief documentation of the typical targets used
1097 # ---------------------------------------------------------------------------
1098
1099 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1100 boards := $(notdir $(boards))
1101
1102 help:
1103         @echo  'Cleaning targets:'
1104         @echo  '  clean           - remove most generated files but keep the config and'
1105         @echo  '                    enough build support to build external modules'
1106         @echo  '  mrproper        - remove all generated files + config + various backup files'
1107         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1108         @echo  ''
1109         @echo  'Configuration targets:'
1110         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1111         @echo  ''
1112         @echo  'Other generic targets:'
1113         @echo  '  all             - Build all targets marked with [*]'
1114         @echo  '* vmlinux         - Build the bare kernel'
1115         @echo  '* modules         - Build all modules'
1116         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1117         @echo  '  dir/            - Build all files in dir and below'
1118         @echo  '  dir/file.[ois]  - Build specified target only'
1119         @echo  '  dir/file.ko     - Build module including final link'
1120         @echo  '  rpm             - Build a kernel as an RPM package'
1121         @echo  '  tags/TAGS       - Generate tags file for editors'
1122         @echo  '  cscope          - Generate cscope index'
1123         @echo  '  kernelrelease   - Output the release version string'
1124         @echo  '  kernelversion   - Output the version stored in Makefile'
1125         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1126          echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1127          fi
1128         @echo  '                    (default: $(INSTALL_HDR_PATH))'
1129         @echo  ''
1130         @echo  'Static analysers'
1131         @echo  '  checkstack      - Generate a list of stack hogs'
1132         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1133         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1134          echo  '  headers_check   - Sanity check on exported headers'; \
1135          fi
1136         @echo  ''
1137         @echo  'Kernel packaging:'
1138         @$(MAKE) $(build)=$(package-dir) help
1139         @echo  ''
1140         @echo  'Documentation targets:'
1141         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1142         @echo  ''
1143         @echo  'Architecture specific targets ($(ARCH)):'
1144         @$(if $(archhelp),$(archhelp),\
1145                 echo '  No architecture specific help defined for $(ARCH)')
1146         @echo  ''
1147         @$(if $(boards), \
1148                 $(foreach b, $(boards), \
1149                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1150                 echo '')
1151
1152         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1153         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1154         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1155         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1156         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1157         @echo  ''
1158         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1159         @echo  'For further info see the ./README file'
1160
1161
1162 # Documentation targets
1163 # ---------------------------------------------------------------------------
1164 %docs: scripts_basic FORCE
1165         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1166
1167 else # KBUILD_EXTMOD
1168
1169 ###
1170 # External module support.
1171 # When building external modules the kernel used as basis is considered
1172 # read-only, and no consistency checks are made and the make
1173 # system is not used on the basis kernel. If updates are required
1174 # in the basis kernel ordinary make commands (without M=...) must
1175 # be used.
1176 #
1177 # The following are the only valid targets when building external
1178 # modules.
1179 # make M=dir clean     Delete all automatically generated files
1180 # make M=dir modules   Make all modules in specified dir
1181 # make M=dir           Same as 'make M=dir modules'
1182 # make M=dir modules_install
1183 #                      Install the modules built in the module directory
1184 #                      Assumes install directory is already created
1185
1186 # We are always building modules
1187 KBUILD_MODULES := 1
1188 PHONY += crmodverdir
1189 crmodverdir:
1190         $(Q)mkdir -p $(MODVERDIR)
1191         $(Q)rm -f $(MODVERDIR)/*
1192
1193 PHONY += $(objtree)/Module.symvers
1194 $(objtree)/Module.symvers:
1195         @test -e $(objtree)/Module.symvers || ( \
1196         echo; \
1197         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1198         echo "           is missing; modules will have no dependencies and modversions."; \
1199         echo )
1200
1201 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1202 PHONY += $(module-dirs) modules
1203 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1204         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1205
1206 modules: $(module-dirs)
1207         @echo '  Building modules, stage 2.';
1208         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1209
1210 PHONY += modules_install
1211 modules_install: _emodinst_ _emodinst_post
1212
1213 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1214 PHONY += _emodinst_
1215 _emodinst_:
1216         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1217         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1218
1219 # Run depmod only is we have System.map and depmod is executable
1220 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1221       cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1222                       $(DEPMOD) -ae -F System.map             \
1223                       $(if $(strip $(INSTALL_MOD_PATH)),      \
1224                       -b $(INSTALL_MOD_PATH) -r)              \
1225                       $(KERNELRELEASE);                       \
1226                    fi
1227
1228 PHONY += _emodinst_post
1229 _emodinst_post: _emodinst_
1230         $(call cmd,depmod)
1231
1232 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1233
1234 PHONY += $(clean-dirs) clean
1235 $(clean-dirs):
1236         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1237
1238 clean:  rm-dirs := $(MODVERDIR)
1239 clean: $(clean-dirs)
1240         $(call cmd,rmdirs)
1241         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1242                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1243                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1244                 -type f -print | xargs rm -f
1245
1246 help:
1247         @echo  '  Building external modules.'
1248         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1249         @echo  ''
1250         @echo  '  modules         - default target, build the module(s)'
1251         @echo  '  modules_install - install the module'
1252         @echo  '  clean           - remove generated files in module directory only'
1253         @echo  ''
1254
1255 # Dummies...
1256 PHONY += prepare scripts
1257 prepare: ;
1258 scripts: ;
1259 endif # KBUILD_EXTMOD
1260
1261 # Generate tags for editors
1262 # ---------------------------------------------------------------------------
1263
1264 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1265 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1266 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1267
1268 ifeq ($(src),$(obj))
1269 __srctree =
1270 else
1271 __srctree = $(srctree)/
1272 endif
1273
1274 ifeq ($(ALLSOURCE_ARCHS),)
1275 ifeq ($(ARCH),um)
1276 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1277 else
1278 ALLINCLUDE_ARCHS := $(ARCH)
1279 endif
1280 else
1281 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1282 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1283 endif
1284
1285 ALLSOURCE_ARCHS := $(ARCH)
1286
1287 define find-sources
1288         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1289                \( -name include -o -name arch \) -prune -o \
1290                -name $1 -print; \
1291           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1292                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1293                     -name $1 -print; \
1294           done ; \
1295           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1296                -name $1 -print; \
1297           find $(__srctree)include $(RCS_FIND_IGNORE) \
1298                \( -name config -o -name 'asm-*' \) -prune \
1299                -o -name $1 -print; \
1300           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1301                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1302                     -name $1 -print; \
1303           done ; \
1304           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1305                -name $1 -print )
1306 endef
1307
1308 define all-sources
1309         $(call find-sources,'*.[chS]')
1310 endef
1311 define all-kconfigs
1312         $(call find-sources,'Kconfig*')
1313 endef
1314 define all-defconfigs
1315         $(call find-sources,'defconfig')
1316 endef
1317
1318 define xtags
1319         if $1 --version 2>&1 | grep -iq exuberant; then \
1320             $(all-sources) | xargs $1 -a \
1321                 -I __initdata,__exitdata,__acquires,__releases \
1322                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1323                 --extra=+f --c-kinds=+px \
1324                 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1325             $(all-kconfigs) | xargs $1 -a \
1326                 --langdef=kconfig \
1327                 --language-force=kconfig \
1328                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1329             $(all-defconfigs) | xargs -r $1 -a \
1330                 --langdef=dotconfig \
1331                 --language-force=dotconfig \
1332                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1333         elif $1 --version 2>&1 | grep -iq emacs; then \
1334             $(all-sources) | xargs $1 -a; \
1335             $(all-kconfigs) | xargs $1 -a \
1336                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1337             $(all-defconfigs) | xargs -r $1 -a \
1338                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1339         else \
1340             $(all-sources) | xargs $1 -a; \
1341         fi
1342 endef
1343
1344 quiet_cmd_cscope-file = FILELST cscope.files
1345       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1346
1347 quiet_cmd_cscope = MAKE    cscope.out
1348       cmd_cscope = cscope -b
1349
1350 cscope: FORCE
1351         $(call cmd,cscope-file)
1352         $(call cmd,cscope)
1353
1354 quiet_cmd_TAGS = MAKE   $@
1355 define cmd_TAGS
1356         rm -f $@; \
1357         $(call xtags,etags)
1358 endef
1359
1360 TAGS: FORCE
1361         $(call cmd,TAGS)
1362
1363 quiet_cmd_tags = MAKE   $@
1364 define cmd_tags
1365         rm -f $@; \
1366         $(call xtags,ctags)
1367 endef
1368
1369 tags: FORCE
1370         $(call cmd,tags)
1371
1372
1373 # Scripts to check various things for consistency
1374 # ---------------------------------------------------------------------------
1375
1376 includecheck:
1377         find * $(RCS_FIND_IGNORE) \
1378                 -name '*.[hcS]' -type f -print | sort \
1379                 | xargs $(PERL) -w scripts/checkincludes.pl
1380
1381 versioncheck:
1382         find * $(RCS_FIND_IGNORE) \
1383                 -name '*.[hcS]' -type f -print | sort \
1384                 | xargs $(PERL) -w scripts/checkversion.pl
1385
1386 namespacecheck:
1387         $(PERL) $(srctree)/scripts/namespace.pl
1388
1389 endif #ifeq ($(config-targets),1)
1390 endif #ifeq ($(mixed-targets),1)
1391
1392 PHONY += checkstack kernelrelease kernelversion
1393
1394 # Use $(SUBARCH) here instead of $(ARCH) so that this works for UML.
1395 # In the UML case, $(SUBARCH) is the name of the underlying
1396 # architecture, while for all other arches, it is the same as $(ARCH).
1397 checkstack:
1398         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1399         $(PERL) $(src)/scripts/checkstack.pl $(SUBARCH)
1400
1401 kernelrelease:
1402         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1403         $(error kernelrelease not valid - run 'make prepare' to update it))
1404 kernelversion:
1405         @echo $(KERNELVERSION)
1406
1407 # Single targets
1408 # ---------------------------------------------------------------------------
1409 # Single targets are compatible with:
1410 # - build whith mixed source and output
1411 # - build with separate output dir 'make O=...'
1412 # - external modules
1413 #
1414 #  target-dir => where to store outputfile
1415 #  build-dir  => directory in kernel source tree to use
1416
1417 ifeq ($(KBUILD_EXTMOD),)
1418         build-dir  = $(patsubst %/,%,$(dir $@))
1419         target-dir = $(dir $@)
1420 else
1421         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1422         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1423         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1424 endif
1425
1426 %.s: %.c prepare scripts FORCE
1427         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1428 %.i: %.c prepare scripts FORCE
1429         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1430 %.o: %.c prepare scripts FORCE
1431         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1432 %.lst: %.c prepare scripts FORCE
1433         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1434 %.s: %.S prepare scripts FORCE
1435         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1436 %.o: %.S prepare scripts FORCE
1437         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1438 %.symtypes: %.c prepare scripts FORCE
1439         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1440
1441 # Modules
1442 / %/: prepare scripts FORCE
1443         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1444         $(build)=$(build-dir)
1445 %.ko: prepare scripts FORCE
1446         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1447         $(build)=$(build-dir) $(@:.ko=.o)
1448         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1449
1450 # FIXME Should go into a make.lib or something
1451 # ===========================================================================
1452
1453 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1454       cmd_rmdirs = rm -rf $(rm-dirs)
1455
1456 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1457       cmd_rmfiles = rm -f $(rm-files)
1458
1459
1460 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1461           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1462           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1463
1464 quiet_cmd_as_o_S = AS      $@
1465 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1466
1467 # read all saved command lines
1468
1469 targets := $(wildcard $(sort $(targets)))
1470 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1471
1472 ifneq ($(cmd_files),)
1473   $(cmd_files): ;       # Do not try to update included dependency files
1474   include $(cmd_files)
1475 endif
1476
1477 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1478 # Usage:
1479 # $(Q)$(MAKE) $(clean)=dir
1480 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1481
1482 endif   # skip-makefile
1483
1484 PHONY += FORCE
1485 FORCE:
1486
1487
1488 # Declare the contents of the .PHONY variable as phony.  We keep that
1489 # information in a variable se we can use it in if_changed and friends.
1490 .PHONY: $(PHONY)