Makefile

   1 VERSION = 1
   2 PATCHLEVEL = 8
   3 SUBLEVEL = 0
   4 EXTRAVERSION = .svn
   5 NAME = Unnamed
   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 busybox), 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           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 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 := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 152                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 153                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 154                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
 155
 156 # Cross compiling and selecting different set of gcc/bin-utils
 157 # ---------------------------------------------------------------------------
 158 #
 159 # When performing cross compilation for other architectures ARCH shall be set
 160 # to the target architecture. (See arch/* for the possibilities).
 161 # ARCH can be set during invocation of make:
 162 # make ARCH=ia64
 163 # Another way is to have ARCH set in the environment.
 164 # The default ARCH is the host where make is executed.
 165
 166 # CROSS_COMPILE specify the prefix used for all executables used
 167 # during compilation. Only gcc and related bin-utils executables
 168 # are prefixed with $(CROSS_COMPILE).
 169 # CROSS_COMPILE can be set on the command line
 170 # make CROSS_COMPILE=ia64-linux-
 171 # Alternatively CROSS_COMPILE can be set in the environment.
 172 # Default value for CROSS_COMPILE is not to prefix executables
 173 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 174
 175 ARCH            ?= $(SUBARCH)
 176 CROSS_COMPILE   ?=
 177
 178 # Architecture as present in compile.h
 179 UTS_MACHINE := $(ARCH)
 180
 181 # SHELL used by kbuild
 182 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 183           else if [ -x /bin/bash ]; then echo /bin/bash; \
 184           else echo sh; fi ; fi)
 185
 186 #       Decide whether to build built-in, modular, or both.
 187 #       Normally, just do built-in.
 188
 189 KBUILD_MODULES :=
 190 KBUILD_BUILTIN := 1
 191
 192 #       If we have only "make modules", don't compile built-in objects.
 193 #       When we're building modules with modversions, we need to consider
 194 #       the built-in objects during the descend as well, in order to
 195 #       make sure the checksums are uptodate before we record them.
 196
 197 ifeq ($(MAKECMDGOALS),modules)
 198   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 199 endif
 200
 201 #       If we have "make <whatever> modules", compile modules
 202 #       in addition to whatever we do anyway.
 203 #       Just "make" or "make all" shall build modules as well
 204
 205 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 206   KBUILD_MODULES := 1
 207 endif
 208
 209 ifeq ($(MAKECMDGOALS),)
 210   KBUILD_MODULES := 1
 211 endif
 212
 213 export KBUILD_MODULES KBUILD_BUILTIN
 214 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 215
 216 # Beautify output
 217 # ---------------------------------------------------------------------------
 218 #
 219 # Normally, we echo the whole command before executing it. By making
 220 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 221 # $(quiet) to choose other forms of output instead, e.g.
 222 #
 223 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 224 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 225 #
 226 # If $(quiet) is empty, the whole command will be printed.
 227 # If it is set to "quiet_", only the short version will be printed.
 228 # If it is set to "silent_", nothing wil be printed at all, since
 229 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 230 #
 231 # A simple variant is to prefix commands with $(Q) - that's useful
 232 # for commands that shall be hidden in non-verbose mode.
 233 #
 234 #       $(Q)ln $@ :<
 235 #
 236 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 237 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 238
 239 ifeq ($(KBUILD_VERBOSE),1)
 240   quiet =
 241   Q =
 242 else
 243   quiet=quiet_
 244   Q = @
 245 endif
 246
 247 # If the user is running make -s (silent mode), suppress echoing of
 248 # commands
 249
 250 ifneq ($(findstring s,$(MAKEFLAGS)),)
 251   quiet=silent_
 252 endif
 253
 254 export quiet Q KBUILD_VERBOSE
 255
 256
 257 # Look for make include files relative to root of kernel src
 258 MAKEFLAGS += --include-dir=$(srctree)
 259
 260 HOSTCC          = gcc
 261 HOSTCXX         = g++
 262 HOSTCFLAGS      :=
 263 HOSTCXXFLAGS    :=
 264 # We need some generic definitions
 265 include $(srctree)/scripts/Kbuild.include
 266
 267 HOSTCFLAGS      += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,)
 268 HOSTCXXFLAGS    += -O2
 269
 270 # For maximum performance (+ possibly random breakage, uncomment
 271 # the following)
 272
 273 MAKEFLAGS += -rR
 274
 275 # Make variables (CC, etc...)
 276
 277 AS              = $(CROSS_COMPILE)as
 278 CC              = $(CROSS_COMPILE)gcc
 279 LD              = $(CC) -nostdlib
 280 CPP             = $(CC) -E
 281 AR              = $(CROSS_COMPILE)ar
 282 NM              = $(CROSS_COMPILE)nm
 283 STRIP           = $(CROSS_COMPILE)strip
 284 OBJCOPY         = $(CROSS_COMPILE)objcopy
 285 OBJDUMP         = $(CROSS_COMPILE)objdump
 286 AWK             = awk
 287 GENKSYMS        = scripts/genksyms/genksyms
 288 DEPMOD          = /sbin/depmod
 289 KALLSYMS        = scripts/kallsyms
 290 PERL            = perl
 291 CHECK           = sparse
 292
 293 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 294 MODFLAGS        = -DMODULE
 295 CFLAGS_MODULE   = $(MODFLAGS)
 296 AFLAGS_MODULE   = $(MODFLAGS)
 297 LDFLAGS_MODULE  = -r
 298 CFLAGS_KERNEL   =
 299 AFLAGS_KERNEL   =
 300
 301
 302 # Use LINUXINCLUDE when you must reference the include/ directory.
 303 # Needed to be compatible with the O= option
 304 CFLAGS          := $(CFLAGS)
 305 CPPFLAGS        := $(CPPFLAGS)
 306 AFLAGS          := $(AFLAGS)
 307 LDFLAGS         := $(LDFLAGS)
 308 LDLIBS          :=
 309
 310 # Read KERNELRELEASE from .kernelrelease (if it exists)
 311 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
 312 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 313
 314 export  VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
 315         ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 316         CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 317         HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 318
 319 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 320 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 321 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 322 export FLTFLAGS
 323
 324 # When compiling out-of-tree modules, put MODVERDIR in the module
 325 # tree rather than in the kernel tree. The kernel tree might
 326 # even be read-only.
 327 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 328
 329 # Files to ignore in find ... statements
 330
 331 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
 332 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 333
 334 # ===========================================================================
 335 # Rules shared between *config targets and build targets
 336
 337 # Basic helpers built in scripts/
 338 PHONY += scripts_basic
 339 scripts_basic:
 340         $(Q)$(MAKE) $(build)=scripts/basic
 341
 342 # To avoid any implicit rule to kick in, define an empty command.
 343 scripts/basic/%: scripts_basic ;
 344
 345 PHONY += outputmakefile
 346 # outputmakefile generates a Makefile in the output directory, if using a
 347 # separate output directory. This allows convenient use of make in the
 348 # output directory.
 349 outputmakefile:
 350 ifneq ($(KBUILD_SRC),)
 351         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 352             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 353 endif
 354
 355 # To make sure we do not include .config for any of the *config targets
 356 # catch them early, and hand them over to scripts/kconfig/Makefile
 357 # It is allowed to specify more targets when calling make, including
 358 # mixing *config targets and build targets.
 359 # For example 'make oldconfig all'.
 360 # Detect when mixed targets is specified, and make a second invocation
 361 # of make so .config is not included in this case either (for *config).
 362
 363 no-dot-config-targets := clean mrproper distclean \
 364                          cscope TAGS tags help %docs check%
 365
 366 config-targets := 0
 367 mixed-targets  := 0
 368 dot-config     := 1
 369
 370 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 371         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 372                 dot-config := 0
 373         endif
 374 endif
 375
 376 ifeq ($(KBUILD_EXTMOD),)
 377         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 378                 config-targets := 1
 379                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 380                         mixed-targets := 1
 381                 endif
 382         endif
 383 endif
 384
 385 ifeq ($(mixed-targets),1)
 386 # ===========================================================================
 387 # We're called with mixed targets (*config and build targets).
 388 # Handle them one by one.
 389
 390 %:: FORCE
 391         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 392
 393 else
 394 ifeq ($(config-targets),1)
 395 # ===========================================================================
 396 # *config targets only - make sure prerequisites are updated, and descend
 397 # in scripts/kconfig to make the *config target
 398
 399 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 400 # KBUILD_DEFCONFIG may point out an alternative default configuration
 401 # used for 'make defconfig'
 402 -include $(srctree)/arch/$(ARCH)/Makefile
 403 export KBUILD_DEFCONFIG
 404
 405 config %config: scripts_basic outputmakefile FORCE
 406         $(Q)mkdir -p include
 407         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 408         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
 409
 410 else
 411 # ===========================================================================
 412 # Build targets only - this includes busybox, arch specific targets, clean
 413 # targets and others. In general all targets except *config targets.
 414
 415 ifeq ($(KBUILD_EXTMOD),)
 416 # Additional helpers built in scripts/
 417 # Carefully list dependencies so we do not try to build scripts twice
 418 # in parrallel
 419 PHONY += scripts
 420 scripts: scripts_basic include/config/MARKER
 421         $(Q)$(MAKE) $(build)=$(@)
 422
 423 scripts_basic: include/autoconf.h
 424
 425 # Objects we will link into busybox / subdirs we need to visit
 426 core-y          := \
 427                 applets/ \
 428
 429 libs-y          := \
 430                 archival/ \
 431                 archival/libunarchive/ \
 432                 console-tools/ \
 433                 coreutils/ \
 434                 coreutils/libcoreutils/ \
 435                 debianutils/ \
 436                 e2fsprogs/ \
 437                 editors/ \
 438                 findutils/ \
 439                 init/ \
 440                 ipsvd/ \
 441                 libbb/ \
 442                 libpwdgrp/ \
 443                 loginutils/ \
 444                 miscutils/ \
 445                 modutils/ \
 446                 networking/ \
 447                 networking/libiproute/ \
 448                 networking/udhcp/ \
 449                 procps/ \
 450                 runit/ \
 451                 selinux/ \
 452                 shell/ \
 453                 sysklogd/ \
 454                 util-linux/ \
 455
 456 endif # KBUILD_EXTMOD
 457
 458 ifeq ($(dot-config),1)
 459 # In this section, we need .config
 460
 461 # Read in dependencies to all Kconfig* files, make sure to run
 462 # oldconfig if changes are detected.
 463 -include .kconfig.d
 464
 465 -include .config
 466
 467 # If .config needs to be updated, it will be done via the dependency
 468 # that autoconf has on .config.
 469 # To avoid any implicit rule to kick in, define an empty command
 470 .config .kconfig.d: ;
 471
 472 # Now we can define CFLAGS etc according to .config
 473 include $(srctree)/Makefile.flags
 474
 475 # If .config is newer than include/autoconf.h, someone tinkered
 476 # with it and forgot to run make oldconfig.
 477 # If kconfig.d is missing then we are probarly in a cleaned tree so
 478 # we execute the config step to be sure to catch updated Kconfig files
 479 include/autoconf.h: .kconfig.d .config
 480         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 481
 482 else
 483 # Dummy target needed, because used as prerequisite
 484 include/autoconf.h: ;
 485 endif
 486
 487 # The all: target is the default when no target is given on the
 488 # command line.
 489 # This allow a user to issue only 'make' to build a kernel including modules
 490 # Defaults busybox but it is usually overridden in the arch makefile
 491 all: busybox
 492
 493 -include $(srctree)/arch/$(ARCH)/Makefile
 494
 495 # arch Makefile may override CC so keep this after arch Makefile is included
 496 #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 497 CHECKFLAGS += $(NOSTDINC_FLAGS)
 498
 499 # warn about C99 declaration after statement
 500 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 501
 502 # disable pointer signedness warnings in gcc 4.0
 503 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 504
 505 # Default kernel image to build when no specific target is given.
 506 # KBUILD_IMAGE may be overruled on the commandline or
 507 # set in the environment
 508 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 509 # this default value
 510 export KBUILD_IMAGE ?= busybox
 511
 512 #
 513 # INSTALL_PATH specifies where to place the updated kernel and system map
 514 # images. Default is /boot, but you can set it to other values
 515 export  INSTALL_PATH ?= /boot
 516
 517 #
 518 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 519 # relocations required by build roots.  This is not defined in the
 520 # makefile but the arguement can be passed to make if needed.
 521 #
 522
 523 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 524 export MODLIB
 525
 526
 527 ifeq ($(KBUILD_EXTMOD),)
 528 busybox-dirs    := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
 529
 530 busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
 531                      $(core-n) $(core-) $(libs-n) $(libs-) \
 532                 )))
 533
 534 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 535 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 536 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 537 libs-y          := $(libs-y1) $(libs-y2)
 538
 539 # Build busybox
 540 # ---------------------------------------------------------------------------
 541 # busybox is build from the objects selected by $(busybox-init) and
 542 # $(busybox-main). Most are built-in.o files from top-level directories
 543 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 544 # Ordering when linking is important, and $(busybox-init) must be first.
 545 #
 546 # busybox
 547 #   ^
 548 #   |
 549 #   +-< $(busybox-init)
 550 #   |   +--< init/version.o + more
 551 #   |
 552 #   +--< $(busybox-main)
 553 #   |    +--< driver/built-in.o mm/built-in.o + more
 554 #   |
 555 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 556 #
 557 # busybox version (uname -v) cannot be updated during normal
 558 # descending-into-subdirs phase since we do not yet know if we need to
 559 # update busybox.
 560 # Therefore this step is delayed until just before final link of busybox -
 561 # except in the kallsyms case where it is done just before adding the
 562 # symbols to the kernel.
 563 #
 564 # System.map is generated to document addresses of all kernel symbols
 565
 566 busybox-all  := $(core-y) $(libs-y)
 567
 568 # Rule to link busybox - also used during CONFIG_KALLSYMS
 569 # May be overridden by arch/$(ARCH)/Makefile
 570 quiet_cmd_busybox__ ?= LINK    $@
 571       cmd_busybox__ ?= $(srctree)/scripts/trylink \
 572       "$@" \
 573       "$(CC)" \
 574       "$(LDFLAGS) $(EXTRA_LDFLAGS)" \
 575       "$(core-y)" \
 576       "$(libs-y)" \
 577       "$(LDLIBS)"
 578
 579 # Generate System.map
 580 quiet_cmd_sysmap = SYSMAP
 581       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 582
 583 # Link of busybox
 584 # If CONFIG_KALLSYMS is set .version is already updated
 585 # Generate System.map and verify that the content is consistent
 586 # Use + in front of the busybox_version rule to silent warning with make -j2
 587 # First command is ':' to allow us to use + in front of the rule
 588 define rule_busybox__
 589         :
 590         $(call cmd,busybox__)
 591         $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
 592 endef
 593
 594
 595 ifdef CONFIG_KALLSYMS
 596 # Generate section listing all symbols and add it into busybox $(kallsyms.o)
 597 # It's a three stage process:
 598 # o .tmp_busybox1 has all symbols and sections, but __kallsyms is
 599 #   empty
 600 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 601 #   the right size - busybox version (uname -v) is updated during this step
 602 # o .tmp_busybox2 now has a __kallsyms section of the right size,
 603 #   but due to the added section, some addresses have shifted.
 604 #   From here, we generate a correct .tmp_kallsyms2.o
 605 # o The correct .tmp_kallsyms2.o is linked into the final busybox.
 606 # o Verify that the System.map from busybox matches the map from
 607 #   .tmp_busybox2, just in case we did not generate kallsyms correctly.
 608 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 609 #   .tmp_busybox3 and .tmp_kallsyms3.o.  This is only meant as a
 610 #   temporary bypass to allow the kernel to be built while the
 611 #   maintainers work out what went wrong with kallsyms.
 612
 613 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 614 last_kallsyms := 3
 615 else
 616 last_kallsyms := 2
 617 endif
 618
 619 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 620
 621 define verify_kallsyms
 622         $(Q)$(if $($(quiet)cmd_sysmap),                       \
 623           echo '  $($(quiet)cmd_sysmap) .tmp_System.map' &&)  \
 624           $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
 625         $(Q)cmp -s System.map .tmp_System.map ||              \
 626                 (echo Inconsistent kallsyms data;             \
 627                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
 628                  rm .tmp_kallsyms* ; /bin/false )
 629 endef
 630
 631 # Update busybox version before link
 632 # Use + in front of this rule to silent warning about make -j1
 633 # First command is ':' to allow us to use + in front of this rule
 634 cmd_ksym_ld = $(cmd_busybox__)
 635 define rule_ksym_ld
 636         :
 637         +$(call cmd,busybox_version)
 638         $(call cmd,busybox__)
 639         $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
 640 endef
 641
 642 # Generate .S file with all kernel symbols
 643 quiet_cmd_kallsyms = KSYM    $@
 644       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 645                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 646
 647 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 648         $(call if_changed_dep,as_o_S)
 649
 650 .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
 651         $(call cmd,kallsyms)
 652
 653 # .tmp_busybox1 must be complete except kallsyms, so update busybox version
 654 .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
 655         $(call if_changed_rule,ksym_ld)
 656
 657 .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
 658         $(call if_changed,busybox__)
 659
 660 .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
 661         $(call if_changed,busybox__)
 662
 663 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 664 $(KALLSYMS): scripts ;
 665
 666 # Generate some data for debugging strange kallsyms problems
 667 debug_kallsyms: .tmp_map$(last_kallsyms)
 668
 669 .tmp_map%: .tmp_busybox% FORCE
 670         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 671
 672 .tmp_map3: .tmp_map2
 673
 674 .tmp_map2: .tmp_map1
 675
 676 endif # ifdef CONFIG_KALLSYMS
 677
 678 # busybox image - including updated kernel symbols
 679 busybox_unstripped: $(busybox-all) FORCE
 680         $(call if_changed_rule,busybox__)
 681         $(Q)rm -f .old_version
 682
 683 busybox: busybox_unstripped
 684 ifeq ($(SKIP_STRIP),y)
 685         $(Q)cp $< $@
 686 else
 687         $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
 688                 busybox_unstripped -o $@
 689 endif
 690
 691 # The actual objects are generated when descending,
 692 # make sure no implicit rule kicks in
 693 $(sort $(busybox-all)): $(busybox-dirs) ;
 694
 695 # Handle descending into subdirectories listed in $(busybox-dirs)
 696 # Preset locale variables to speed up the build process. Limit locale
 697 # tweaks to this spot to avoid wrong language settings when running
 698 # make menuconfig etc.
 699 # Error messages still appears in the original language
 700
 701 PHONY += $(busybox-dirs)
 702 $(busybox-dirs): prepare scripts
 703         $(Q)$(MAKE) $(build)=$@
 704
 705 # Build the kernel release string
 706 # The KERNELRELEASE is stored in a file named .kernelrelease
 707 # to be used when executing for example make install or make modules_install
 708 #
 709 # Take the contents of any files called localversion* and the config
 710 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
 711 # LOCALVERSION from the command line override all of this
 712
 713 nullstring :=
 714 space      := $(nullstring) # end of line
 715
 716 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 717 __localver  = $(sort $(wildcard $(___localver)))
 718 # skip backup files (containing '~')
 719 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 720
 721 localver = $(subst $(space),, \
 722            $(shell cat /dev/null $(_localver)) \
 723            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 724
 725 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 726 # and if the SCM is know a tag from the SCM is appended.
 727 # The appended tag is determinded by the SCM used.
 728 #
 729 # Currently, only git is supported.
 730 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 731 # checks as needed.
 732 ifdef CONFIG_LOCALVERSION_AUTO
 733         _localver-auto = $(shell $(CONFIG_SHELL) \
 734                           $(srctree)/scripts/setlocalversion $(srctree))
 735         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 736 endif
 737
 738 localver-full = $(localver)$(localver-auto)
 739
 740 # Store (new) KERNELRELASE string in .kernelrelease
 741 kernelrelease = $(KERNELVERSION)$(localver-full)
 742 .kernelrelease: FORCE
 743         $(Q)rm -f $@
 744         $(Q)echo $(kernelrelease) > $@
 745
 746
 747 # Things we need to do before we recursively start building the kernel
 748 # or the modules are listed in "prepare".
 749 # A multi level approach is used. prepareN is processed before prepareN-1.
 750 # archprepare is used in arch Makefiles and when processed asm symlink,
 751 # version.h and scripts_basic is processed / created.
 752
 753 # Listed in dependency order
 754 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 755
 756 # prepare-all is deprecated, use prepare as valid replacement
 757 PHONY += prepare-all
 758
 759 # prepare3 is used to check if we are building in a separate output directory,
 760 # and if so do:
 761 # 1) Check that make has not been executed in the kernel src $(srctree)
 762 # 2) Create the include2 directory, used for the second asm symlink
 763 prepare3: .kernelrelease
 764 ifneq ($(KBUILD_SRC),)
 765         @echo '  Using $(srctree) as source for busybox'
 766         $(Q)if [ -f $(srctree)/.config ]; then \
 767                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 768                 echo "  in the '$(srctree)' directory.";\
 769                 /bin/false; \
 770         fi;
 771         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 772         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 773 endif
 774
 775 # prepare2 creates a makefile if using a separate output directory
 776 prepare2: prepare3 outputmakefile
 777
 778 prepare1: prepare2 include/config/MARKER
 779 ifneq ($(KBUILD_MODULES),)
 780         $(Q)mkdir -p $(MODVERDIR)
 781         $(Q)rm -f $(MODVERDIR)/*
 782 endif
 783
 784 archprepare: prepare1 scripts_basic
 785
 786 prepare0: archprepare FORCE
 787         $(Q)$(MAKE) $(build)=.
 788
 789 # All the preparing..
 790 prepare prepare-all: prepare0
 791
 792 #       Leave this as default for preprocessing busybox.lds.S, which is now
 793 #       done in arch/$(ARCH)/kernel/Makefile
 794
 795 export CPPFLAGS_busybox.lds += -P -C -U$(ARCH)
 796
 797 #       FIXME: The asm symlink changes when $(ARCH) changes. That's
 798 #       hard to detect, but I suppose "make mrproper" is a good idea
 799 #       before switching between archs anyway.
 800
 801 #bbox# include/asm:
 802 #bbox#  @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 803 #bbox#  $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 804 #bbox#  @ln -fsn asm-$(ARCH) $@
 805
 806 #       Split autoconf.h into include/linux/config/*
 807 quiet_cmd_gen_bbconfigopts = GEN     include/bbconfigopts.h
 808       cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs > include/bbconfigopts.h
 809 quiet_cmd_split_autoconf   = SPLIT   include/autoconf.h -> include/config/*
 810       cmd_split_autoconf   = scripts/basic/split-include include/autoconf.h include/config
 811 #bbox# piggybacked generation of few .h files
 812 include/config/MARKER: scripts/basic/split-include include/autoconf.h
 813         $(call cmd,split_autoconf)
 814         $(call cmd,gen_bbconfigopts)
 815         @touch $@
 816
 817 # Generate some files
 818 # ---------------------------------------------------------------------------
 819
 820 # KERNELRELEASE can change from a few different places, meaning version.h
 821 # needs to be updated, so this check is forced on all builds
 822
 823 uts_len := 64
 824
 825 define filechk_version.h
 826         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 827           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 828           exit 1; \
 829         fi; \
 830         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
 831           echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
 832          echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
 833         )
 834 endef
 835
 836 # ---------------------------------------------------------------------------
 837
 838 PHONY += depend dep
 839 depend dep:
 840         @echo '*** Warning: make $@ is unnecessary now.'
 841
 842 # ---------------------------------------------------------------------------
 843 # Modules
 844
 845 ifdef CONFIG_MODULES
 846
 847 #       By default, build modules as well
 848
 849 all: modules
 850
 851 #       Build modules
 852
 853 PHONY += modules
 854 modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
 855         @echo '  Building modules, stage 2.';
 856         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 857
 858
 859 # Target to prepare building external modules
 860 PHONY += modules_prepare
 861 modules_prepare: prepare scripts
 862
 863 # Target to install modules
 864 PHONY += modules_install
 865 modules_install: _modinst_ _modinst_post
 866
 867 PHONY += _modinst_
 868 _modinst_:
 869         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 870                 echo "Warning: you may need to install module-init-tools"; \
 871                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 872                 sleep 1; \
 873         fi
 874         @rm -rf $(MODLIB)/kernel
 875         @rm -f $(MODLIB)/source
 876         @mkdir -p $(MODLIB)/kernel
 877         @ln -s $(srctree) $(MODLIB)/source
 878         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 879                 rm -f $(MODLIB)/build ; \
 880                 ln -s $(objtree) $(MODLIB)/build ; \
 881         fi
 882         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
 883
 884 # If System.map exists, run depmod.  This deliberately does not have a
 885 # dependency on System.map since that would run the dependency tree on
 886 # busybox.  This depmod is only for convenience to give the initial
 887 # boot a modules.dep even before / is mounted read-write.  However the
 888 # boot script depmod is the master version.
 889 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 890 depmod_opts     :=
 891 else
 892 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 893 endif
 894 PHONY += _modinst_post
 895 _modinst_post: _modinst_
 896         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 897
 898 else # CONFIG_MODULES
 899
 900 # Modules not configured
 901 # ---------------------------------------------------------------------------
 902
 903 modules modules_install: FORCE
 904         @echo
 905         @echo "The present busybox configuration has modules disabled."
 906         @echo "Type 'make config' and enable loadable module support."
 907         @echo "Then build a kernel with module support enabled."
 908         @echo
 909         @exit 1
 910
 911 endif # CONFIG_MODULES
 912
 913 ###
 914 # Cleaning is done on three levels.
 915 # make clean     Delete most generated files
 916 #                Leave enough to build external modules
 917 # make mrproper  Delete the current configuration, and all generated files
 918 # make distclean Remove editor backup files, patch leftover files and the like
 919
 920 # Directories & files removed with 'make clean'
 921 CLEAN_DIRS  += $(MODVERDIR)
 922 CLEAN_FILES +=  busybox* System.map .kernelrelease \
 923                 .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
 924
 925 # Directories & files removed with 'make mrproper'
 926 MRPROPER_DIRS  += include/config include2
 927 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
 928                   include/autoconf.h \
 929                   include/bbconfigopts.h \
 930                   include/usage_compressed.h \
 931                   .kernelrelease Module.symvers tags TAGS cscope*
 932
 933 # clean - Delete most, but leave enough to build external modules
 934 #
 935 clean: rm-dirs  := $(CLEAN_DIRS)
 936 clean: rm-files := $(CLEAN_FILES)
 937 clean-dirs      := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
 938
 939 PHONY += $(clean-dirs) clean archclean
 940 $(clean-dirs):
 941         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 942
 943 clean: archclean $(clean-dirs)
 944         $(call cmd,rmdirs)
 945         $(call cmd,rmfiles)
 946         @find . $(RCS_FIND_IGNORE) \
 947                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 948                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
 949                 -type f -print | xargs rm -f
 950
 951 # mrproper - Delete all generated files, including .config
 952 #
 953 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
 954 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
 955 mrproper-dirs      := $(addprefix _mrproper_,scripts)
 956
 957 PHONY += $(mrproper-dirs) mrproper archmrproper
 958 $(mrproper-dirs):
 959         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
 960
 961 mrproper: clean archmrproper $(mrproper-dirs)
 962         $(call cmd,rmdirs)
 963         $(call cmd,rmfiles)
 964
 965 # distclean
 966 #
 967 PHONY += distclean
 968
 969 distclean: mrproper
 970         @find $(srctree) $(RCS_FIND_IGNORE) \
 971                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 972                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 973                 -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \
 974                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
 975                 -type f -print | xargs rm -f
 976
 977
 978 # Packaging of the kernel to various formats
 979 # ---------------------------------------------------------------------------
 980 # rpm target kept for backward compatibility
 981 package-dir     := $(srctree)/scripts/package
 982
 983 %pkg: FORCE
 984         $(Q)$(MAKE) $(build)=$(package-dir) $@
 985 rpm: FORCE
 986         $(Q)$(MAKE) $(build)=$(package-dir) $@
 987
 988
 989 # Brief documentation of the typical targets used
 990 # ---------------------------------------------------------------------------
 991
 992 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
 993 boards := $(notdir $(boards))
 994
 995 -include $(srctree)/Makefile.help
 996
 997 # Documentation targets
 998 # ---------------------------------------------------------------------------
 999 %docs: scripts_basic FORCE
1000         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1001
1002 else # KBUILD_EXTMOD
1003
1004 ###
1005 # External module support.
1006 # When building external modules the kernel used as basis is considered
1007 # read-only, and no consistency checks are made and the make
1008 # system is not used on the basis kernel. If updates are required
1009 # in the basis kernel ordinary make commands (without M=...) must
1010 # be used.
1011 #
1012 # The following are the only valid targets when building external
1013 # modules.
1014 # make M=dir clean     Delete all automatically generated files
1015 # make M=dir modules   Make all modules in specified dir
1016 # make M=dir           Same as 'make M=dir modules'
1017 # make M=dir modules_install
1018 #                      Install the modules build in the module directory
1019 #                      Assumes install directory is already created
1020
1021 # We are always building modules
1022 KBUILD_MODULES := 1
1023 PHONY += crmodverdir
1024 crmodverdir:
1025         $(Q)mkdir -p $(MODVERDIR)
1026         $(Q)rm -f $(MODVERDIR)/*
1027
1028 PHONY += $(objtree)/Module.symvers
1029 $(objtree)/Module.symvers:
1030         @test -e $(objtree)/Module.symvers || ( \
1031         echo; \
1032         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1033         echo "           is missing; modules will have no dependencies and modversions."; \
1034         echo )
1035
1036 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1037 PHONY += $(module-dirs) modules
1038 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1039         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1040
1041 modules: $(module-dirs)
1042         @echo '  Building modules, stage 2.';
1043         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1044
1045 PHONY += modules_install
1046 modules_install: _emodinst_ _emodinst_post
1047
1048 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1049 PHONY += _emodinst_
1050 _emodinst_:
1051         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1052         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1053
1054 # Run depmod only is we have System.map and depmod is executable
1055 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1056       cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1057                       $(DEPMOD) -ae -F System.map             \
1058                       $(if $(strip $(INSTALL_MOD_PATH)),      \
1059                       -b $(INSTALL_MOD_PATH) -r)              \
1060                       $(KERNELRELEASE);                       \
1061                    fi
1062
1063 PHONY += _emodinst_post
1064 _emodinst_post: _emodinst_
1065         $(call cmd,depmod)
1066
1067 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1068
1069 PHONY += $(clean-dirs) clean
1070 $(clean-dirs):
1071         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1072
1073 clean:  rm-dirs := $(MODVERDIR)
1074 clean: $(clean-dirs)
1075         $(call cmd,rmdirs)
1076         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1077                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1078                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1079                 -type f -print | xargs rm -f
1080
1081 help:
1082         @echo  '  Building external modules.'
1083         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1084         @echo  ''
1085         @echo  '  modules         - default target, build the module(s)'
1086         @echo  '  modules_install - install the module'
1087         @echo  '  clean           - remove generated files in module directory only'
1088         @echo  ''
1089
1090 # Dummies...
1091 PHONY += prepare scripts
1092 prepare: ;
1093 scripts: ;
1094 endif # KBUILD_EXTMOD
1095
1096 # Generate tags for editors
1097 # ---------------------------------------------------------------------------
1098
1099 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1100 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1101 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1102
1103 ifeq ($(src),$(obj))
1104 __srctree =
1105 else
1106 __srctree = $(srctree)/
1107 endif
1108
1109 ifeq ($(ALLSOURCE_ARCHS),)
1110 ifeq ($(ARCH),um)
1111 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1112 else
1113 ALLINCLUDE_ARCHS := $(ARCH)
1114 endif
1115 else
1116 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1117 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1118 endif
1119
1120 ALLSOURCE_ARCHS := $(ARCH)
1121
1122 define all-sources
1123         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1124                \( -name include -o -name arch \) -prune -o \
1125                -name '*.[chS]' -print; \
1126           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1127                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1128                     -name '*.[chS]' -print; \
1129           done ; \
1130           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1131                -name '*.[chS]' -print; \
1132           find $(__srctree)include $(RCS_FIND_IGNORE) \
1133                \( -name config -o -name 'asm-*' \) -prune \
1134                -o -name '*.[chS]' -print; \
1135           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1136                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1137                     -name '*.[chS]' -print; \
1138           done ; \
1139           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1140                -name '*.[chS]' -print )
1141 endef
1142
1143 quiet_cmd_cscope-file = FILELST cscope.files
1144       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1145
1146 quiet_cmd_cscope = MAKE    cscope.out
1147       cmd_cscope = cscope -b
1148
1149 cscope: FORCE
1150         $(call cmd,cscope-file)
1151         $(call cmd,cscope)
1152
1153 quiet_cmd_TAGS = MAKE   $@
1154 define cmd_TAGS
1155         rm -f $@; \
1156         ETAGSF=`etags --version | grep -i exuberant >/dev/null &&     \
1157                 echo "-I __initdata,__exitdata,__acquires,__releases  \
1158                       -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1159                       --extra=+f --c-kinds=+px"`;                     \
1160                 $(all-sources) | xargs etags $$ETAGSF -a
1161 endef
1162
1163 TAGS: FORCE
1164         $(call cmd,TAGS)
1165
1166
1167 quiet_cmd_tags = MAKE   $@
1168 define cmd_tags
1169         rm -f $@; \
1170         CTAGSF=`ctags --version | grep -i exuberant >/dev/null &&     \
1171                 echo "-I __initdata,__exitdata,__acquires,__releases  \
1172                       -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1173                       --extra=+f --c-kinds=+px"`;                     \
1174                 $(all-sources) | xargs ctags $$CTAGSF -a
1175 endef
1176
1177 tags: FORCE
1178         $(call cmd,tags)
1179
1180
1181 # Scripts to check various things for consistency
1182 # ---------------------------------------------------------------------------
1183
1184 includecheck:
1185         find * $(RCS_FIND_IGNORE) \
1186                 -name '*.[hcS]' -type f -print | sort \
1187                 | xargs $(PERL) -w scripts/checkincludes.pl
1188
1189 versioncheck:
1190         find * $(RCS_FIND_IGNORE) \
1191                 -name '*.[hcS]' -type f -print | sort \
1192                 | xargs $(PERL) -w scripts/checkversion.pl
1193
1194 namespacecheck:
1195         $(PERL) $(srctree)/scripts/namespace.pl
1196
1197 endif #ifeq ($(config-targets),1)
1198 endif #ifeq ($(mixed-targets),1)
1199
1200 PHONY += checkstack
1201 checkstack:
1202         $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
1203         $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1204
1205 kernelrelease:
1206         $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1207         $(error kernelrelease not valid - run 'make *config' to update it))
1208 kernelversion:
1209         @echo $(KERNELVERSION)
1210
1211 # Single targets
1212 # ---------------------------------------------------------------------------
1213 # Single targets are compatible with:
1214 # - build whith mixed source and output
1215 # - build with separate output dir 'make O=...'
1216 # - external modules
1217 #
1218 #  target-dir => where to store outputfile
1219 #  build-dir  => directory in kernel source tree to use
1220
1221 ifeq ($(KBUILD_EXTMOD),)
1222         build-dir  = $(patsubst %/,%,$(dir $@))
1223         target-dir = $(dir $@)
1224 else
1225         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1226         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1227         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1228 endif
1229
1230 %.s: %.c prepare scripts FORCE
1231         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1232 %.i: %.c prepare scripts FORCE
1233         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1234 %.o: %.c prepare scripts FORCE
1235         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1236 %.lst: %.c prepare scripts FORCE
1237         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1238 %.s: %.S prepare scripts FORCE
1239         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1240 %.o: %.S prepare scripts FORCE
1241         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1242
1243 # Modules
1244 / %/: prepare scripts FORCE
1245         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1246         $(build)=$(build-dir)
1247 %.ko: prepare scripts FORCE
1248         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1249         $(build)=$(build-dir) $(@:.ko=.o)
1250         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1251
1252 # FIXME Should go into a make.lib or something
1253 # ===========================================================================
1254
1255 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1256       cmd_rmdirs = rm -rf $(rm-dirs)
1257
1258 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1259       cmd_rmfiles = rm -f $(rm-files)
1260
1261
1262 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1263           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1264           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1265
1266 quiet_cmd_as_o_S = AS      $@
1267 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1268
1269 # read all saved command lines
1270
1271 targets := $(wildcard $(sort $(targets)))
1272 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1273
1274 ifneq ($(cmd_files),)
1275   $(cmd_files): ;       # Do not try to update included dependency files
1276   include $(cmd_files)
1277 endif
1278
1279 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1280 # Usage:
1281 # $(Q)$(MAKE) $(clean)=dir
1282 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1283
1284 endif   # skip-makefile
1285
1286 PHONY += FORCE
1287 FORCE:
1288
1289 -include $(srctree)/Makefile.custom
1290
1291 # Declare the contents of the .PHONY variable as phony.  We keep that
1292 # information in a variable se we can use it in if_changed and friends.
1293 .PHONY: $(PHONY)