Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 0
   3 SUBLEVEL = 0
   4 EXTRAVERSION =-rc10
   5 NAME = Amissive Actinocutious Kiwi
   6
   7 # *DOCUMENTATION*
   8 # To see a list of typical targets execute "make help"
   9 # More info can be located in ./README
  10 # Comments in this file are targeted only to the developer, do not
  11 # expect to learn how to build the kernel reading this file.
  12
  13 # Do not:
  14 # o  use make's built-in rules and variables
  15 #    (this increases performance and avoid hard-to-debug behavour);
  16 # o  print "Entering directory ...";
  17 MAKEFLAGS += -rR --no-print-directory
  18
  19 # We are using a recursive build, so we need to do a little thinking
  20 # to get the ordering right.
  21 #
  22 # Most importantly: sub-Makefiles should only ever modify files in
  23 # their own directory. If in some directory we have a dependency on
  24 # a file in another dir (which doesn't happen often, but it's often
  25 # unavoidable when linking the built-in.o targets which finally
  26 # turn into uboot), we will call a sub make in that other dir, and
  27 # after that we are sure that everything which is in that other dir
  28 # is now up to date.
  29 #
  30 # The only cases where we need to modify files which have global
  31 # effects are thus separated out and done before the recursive
  32 # descending is started. They are now explicitly listed as the
  33 # prepare rule.
  34
  35 # To put more focus on warnings, be less verbose as default
  36 # Use 'make V=1' to see the full commands
  37
  38 ifdef V
  39   ifeq ("$(origin V)", "command line")
  40     KBUILD_VERBOSE = $(V)
  41   endif
  42 endif
  43 ifndef KBUILD_VERBOSE
  44   KBUILD_VERBOSE = 0
  45 endif
  46
  47 # Call a source code checker (by default, "sparse") as part of the
  48 # C compilation.
  49 #
  50 # Use 'make C=1' to enable checking of only re-compiled files.
  51 # Use 'make C=2' to enable checking of *all* source files, regardless
  52 # of whether they are re-compiled or not.
  53 #
  54 # See the file "Documentation/sparse.txt" for more details, including
  55 # where to get the "sparse" utility.
  56
  57 ifdef C
  58   ifeq ("$(origin C)", "command line")
  59     KBUILD_CHECKSRC = $(C)
  60   endif
  61 endif
  62 ifndef KBUILD_CHECKSRC
  63   KBUILD_CHECKSRC = 0
  64 endif
  65
  66 # Use make M=dir to specify directory of external module to build
  67 # Old syntax make ... SUBDIRS=$PWD is still supported
  68 # Setting the environment variable KBUILD_EXTMOD take precedence
  69 ifdef SUBDIRS
  70   KBUILD_EXTMOD ?= $(SUBDIRS)
  71 endif
  72 ifdef M
  73   ifeq ("$(origin M)", "command line")
  74     KBUILD_EXTMOD := $(M)
  75   endif
  76 endif
  77
  78
  79 # kbuild supports saving output files in a separate directory.
  80 # To locate output files in a separate directory two syntaxes are supported.
  81 # In both cases the working directory must be the root of the kernel src.
  82 # 1) O=
  83 # Use "make O=dir/to/store/output/files/"
  84 #
  85 # 2) Set KBUILD_OUTPUT
  86 # Set the environment variable KBUILD_OUTPUT to point to the directory
  87 # where the output files shall be placed.
  88 # export KBUILD_OUTPUT=dir/to/store/output/files/
  89 # make
  90 #
  91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  92 # variable.
  93
  94
  95 # KBUILD_SRC is set on invocation of make in OBJ directory
  96 # KBUILD_SRC is not intended to be used by the regular user (for now)
  97 ifeq ($(KBUILD_SRC),)
  98
  99 # OK, Make called in directory where kernel src resides
 100 # Do we want to locate output files in a separate directory?
 101 ifdef O
 102   ifeq ("$(origin O)", "command line")
 103     KBUILD_OUTPUT := $(O)
 104   endif
 105 endif
 106
 107 # That's our default target when none is given on the command line
 108 PHONY := _all
 109 _all:
 110
 111 ifneq ($(KBUILD_OUTPUT),)
 112 # Invoke a second make in the output directory, passing relevant variables
 113 # check that the output directory actually exists
 114 saved-output := $(KBUILD_OUTPUT)
 115 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 116 $(if $(KBUILD_OUTPUT),, \
 117      $(error output directory "$(saved-output)" does not exist))
 118
 119 PHONY += $(MAKECMDGOALS)
 120
 121 $(filter-out _all,$(MAKECMDGOALS)) _all:
 122         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 123         KBUILD_SRC=$(CURDIR) \
 124         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
 125
 126 # Leave processing to above invocation of make
 127 skip-makefile := 1
 128 endif # ifneq ($(KBUILD_OUTPUT),)
 129 endif # ifeq ($(KBUILD_SRC),)
 130
 131 # We process the rest of the Makefile if this is the final invocation of make
 132 ifeq ($(skip-makefile),)
 133
 134 # If building an external module we do not care about the all: rule
 135 # but instead _all depend on modules
 136 PHONY += all
 137 _all: all
 138
 139 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 140 objtree         := $(CURDIR)
 141 src             := $(srctree)
 142 obj             := $(objtree)
 143
 144 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 145
 146 export srctree objtree VPATH
 147
 148 # Cross compiling and selecting different set of gcc/bin-utils
 149 # ---------------------------------------------------------------------------
 150 #
 151 # When performing cross compilation for other architectures ARCH shall be set
 152 # to the target architecture. (See arch/* for the possibilities).
 153 # ARCH can be set during invocation of make:
 154 # make ARCH=ia64
 155 # Another way is to have ARCH set in the environment.
 156 # The default ARCH is the host where make is executed.
 157
 158 # CROSS_COMPILE specify the prefix used for all executables used
 159 # during compilation. Only gcc and related bin-utils executables
 160 # are prefixed with $(CROSS_COMPILE).
 161 # CROSS_COMPILE can be set on the command line
 162 # make CROSS_COMPILE=ia64-linux-
 163 # Alternatively CROSS_COMPILE can be set in the environment.
 164 # Default value for CROSS_COMPILE is not to prefix executables
 165
 166 ARCH            ?= sandbox
 167 CROSS_COMPILE   ?=
 168
 169 # Architecture as present in compile.h
 170 UTS_MACHINE := $(ARCH)
 171 SRCARCH         := $(ARCH)
 172
 173 KCONFIG_CONFIG  ?= .config
 174
 175 # SHELL used by kbuild
 176 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 177           else if [ -x /bin/bash ]; then echo /bin/bash; \
 178           else echo sh; fi ; fi)
 179
 180 HOSTCC       = gcc
 181 HOSTCXX      = g++
 182 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 183 HOSTCXXFLAGS = -O2
 184
 185 # Decide whether to build built-in, modular, or both.
 186 # Normally, just do built-in.
 187
 188 KBUILD_MODULES :=
 189 KBUILD_BUILTIN := 1
 190
 191 #       If we have only "make modules", don't compile built-in objects.
 192 #       When we're building modules with modversions, we need to consider
 193 #       the built-in objects during the descend as well, in order to
 194 #       make sure the checksums are up to date before we record them.
 195
 196 ifeq ($(MAKECMDGOALS),modules)
 197   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 198 endif
 199
 200 #       If we have "make <whatever> modules", compile modules
 201 #       in addition to whatever we do anyway.
 202 #       Just "make" or "make all" shall build modules as well
 203
 204 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 205   KBUILD_MODULES := 1
 206 endif
 207
 208 export KBUILD_MODULES KBUILD_BUILTIN
 209 export KBUILD_CHECKSRC KBUILD_SRC
 210
 211 # Beautify output
 212 # ---------------------------------------------------------------------------
 213 #
 214 # Normally, we echo the whole command before executing it. By making
 215 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 216 # $(quiet) to choose other forms of output instead, e.g.
 217 #
 218 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 219 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 220 #
 221 # If $(quiet) is empty, the whole command will be printed.
 222 # If it is set to "quiet_", only the short version will be printed.
 223 # If it is set to "silent_", nothing will be printed at all, since
 224 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 225 #
 226 # A simple variant is to prefix commands with $(Q) - that's useful
 227 # for commands that shall be hidden in non-verbose mode.
 228 #
 229 #       $(Q)ln $@ :<
 230 #
 231 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 232 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 233
 234 ifeq ($(KBUILD_VERBOSE),1)
 235   quiet =
 236   Q =
 237 else
 238   quiet=quiet_
 239   Q = @
 240 endif
 241
 242 # If the user is running make -s (silent mode), suppress echoing of
 243 # commands
 244
 245 ifneq ($(findstring s,$(MAKEFLAGS)),)
 246   quiet=silent_
 247 endif
 248
 249 export quiet Q KBUILD_VERBOSE
 250
 251
 252 # Look for make include files relative to root of kernel src
 253 MAKEFLAGS += --include-dir=$(srctree)
 254
 255 # We need some generic definitions.
 256 include $(srctree)/scripts/Kbuild.include
 257
 258 # Make variables (CC, etc...)
 259
 260 AS              = $(CROSS_COMPILE)as
 261 LD              = $(CROSS_COMPILE)ld
 262 CC              = $(CROSS_COMPILE)gcc
 263 CPP             = $(CC) -E
 264 AR              = $(CROSS_COMPILE)ar
 265 NM              = $(CROSS_COMPILE)nm
 266 STRIP           = $(CROSS_COMPILE)strip
 267 OBJCOPY         = $(CROSS_COMPILE)objcopy
 268 OBJDUMP         = $(CROSS_COMPILE)objdump
 269 AWK             = awk
 270 GENKSYMS        = scripts/genksyms/genksyms
 271 DEPMOD          = /sbin/depmod
 272 KALLSYMS        = scripts/kallsyms
 273 PERL            = perl
 274 CHECK           = sparse
 275
 276 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 277 CFLAGS_KERNEL   =
 278 AFLAGS_KERNEL   =
 279
 280 LDFLAGS_MODULE  = -T common/module.lds
 281
 282 # When compiling out-of-tree modules, put MODVERDIR in the module
 283 # tree rather than in the kernel tree. The kernel tree might
 284 # even be read-only.
 285 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 286
 287 # Use LINUXINCLUDE when you must reference the include/ directory.
 288 # Needed to be compatible with the O= option
 289 LINUXINCLUDE    := -Iinclude \
 290                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 291                    -I$(srctree)/arch/$(ARCH)/include \
 292                    -include include/linux/autoconf.h
 293
 294 CPPFLAGS        := -D__KERNEL__ -D__U_BOOT__ $(LINUXINCLUDE) -fno-builtin -ffreestanding
 295
 296 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 297                    -fno-strict-aliasing -fno-common -Os -pipe
 298 AFLAGS          := -D__ASSEMBLY__
 299
 300 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 301 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 302 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 303
 304 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 305 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 306 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 307 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 308
 309 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 310 export CFLAGS CFLAGS_KERNEL
 311 export AFLAGS AFLAGS_KERNEL
 312
 313 # Files to ignore in find ... statements
 314
 315 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
 316 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 317
 318 # ===========================================================================
 319 # Rules shared between *config targets and build targets
 320
 321 # Basic helpers built in scripts/
 322 PHONY += scripts_basic
 323 scripts_basic:
 324         $(Q)$(MAKE) $(build)=scripts/basic
 325
 326 # To avoid any implicit rule to kick in, define an empty command.
 327 scripts/basic/%: scripts_basic ;
 328
 329 PHONY += outputmakefile
 330 # outputmakefile generates a Makefile in the output directory, if using a
 331 # separate output directory. This allows convenient use of make in the
 332 # output directory.
 333 outputmakefile:
 334 ifneq ($(KBUILD_SRC),)
 335         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 336             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 337 endif
 338
 339 # To make sure we do not include .config for any of the *config targets
 340 # catch them early, and hand them over to scripts/kconfig/Makefile
 341 # It is allowed to specify more targets when calling make, including
 342 # mixing *config targets and build targets.
 343 # For example 'make oldconfig all'.
 344 # Detect when mixed targets is specified, and make a second invocation
 345 # of make so .config is not included in this case either (for *config).
 346
 347 no-dot-config-targets := clean mrproper distclean \
 348                          cscope TAGS tags help %docs check% \
 349                          include/linux/version.h headers_% \
 350                          kernelrelease kernelversion
 351
 352 config-targets := 0
 353 mixed-targets  := 0
 354 dot-config     := 1
 355
 356 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 357         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 358                 dot-config := 0
 359         endif
 360 endif
 361
 362 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 363         config-targets := 1
 364         ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 365                 mixed-targets := 1
 366         endif
 367 endif
 368
 369 ifeq ($(mixed-targets),1)
 370 # ===========================================================================
 371 # We're called with mixed targets (*config and build targets).
 372 # Handle them one by one.
 373
 374 %:: FORCE
 375         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 376
 377 else
 378 ifeq ($(config-targets),1)
 379 # ===========================================================================
 380 # *config targets only - make sure prerequisites are updated, and descend
 381 # in scripts/kconfig to make the *config target
 382
 383 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 384 # KBUILD_DEFCONFIG may point out an alternative default configuration
 385 # used for 'make defconfig'
 386 include $(srctree)/arch/$(ARCH)/Makefile
 387 export KBUILD_DEFCONFIG
 388
 389 config %config: scripts_basic outputmakefile FORCE
 390         $(Q)mkdir -p include/linux include/config
 391         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 392
 393 else
 394 # ===========================================================================
 395 # Build targets only - this includes uboot, arch specific targets, clean
 396 # targets and others. In general all targets except *config targets.
 397
 398 # Additional helpers built in scripts/
 399 # Carefully list dependencies so we do not try to build scripts twice
 400 # in parallel
 401 PHONY += scripts
 402 scripts: scripts_basic include/config/auto.conf
 403         $(Q)$(MAKE) $(build)=$(@)
 404
 405 # Objects we will link into uboot / subdirs we need to visit
 406 common-y                := common/ drivers/ commands/ lib/ net/ fs/
 407
 408 ifeq ($(dot-config),1)
 409 # Read in config
 410 -include include/config/auto.conf
 411
 412 # Read in dependencies to all Kconfig* files, make sure to run
 413 # oldconfig if changes are detected.
 414 -include include/config/auto.conf.cmd
 415
 416 # To avoid any implicit rule to kick in, define an empty command
 417 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 418
 419 # If .config is newer than include/config/auto.conf, someone tinkered
 420 # with it and forgot to run make oldconfig.
 421 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 422 # we execute the config step to be sure to catch updated Kconfig files
 423 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 424         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 425
 426 else
 427 # Dummy target needed, because used as prerequisite
 428 include/config/auto.conf: ;
 429 endif # $(dot-config)
 430
 431 # The all: target is the default when no target is given on the
 432 # command line.
 433 # This allow a user to issue only 'make' to build a kernel
 434 # Defaults uboot but it is usually overridden in the arch makefile
 435 all: uboot.bin
 436
 437 include $(srctree)/arch/$(ARCH)/Makefile
 438
 439 ifdef CONFIG_DEBUG_INFO
 440 CFLAGS          += -g
 441 endif
 442
 443 # Force gcc to behave correct even for buggy distributions
 444 CFLAGS          += $(call cc-option, -fno-stack-protector)
 445
 446 # arch Makefile may override CC so keep this after arch Makefile is included
 447 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 448 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 449
 450 # warn about C99 declaration after statement
 451 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 452
 453 # disable pointer signed / unsigned warnings in gcc 4.0
 454 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 455
 456 # Default kernel image to build when no specific target is given.
 457 # KBUILD_IMAGE may be overruled on the command line or
 458 # set in the environment
 459 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 460 # this default value
 461 export KBUILD_IMAGE ?= uboot
 462
 463 uboot-dirs      := $(patsubst %/,%,$(filter %/, $(common-y)))
 464
 465 uboot-alldirs   := $(sort $(uboot-dirs) $(patsubst %/,%,$(filter %/, \
 466                      $(common-n) $(common-) \
 467                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 468                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 469
 470 common-y        := $(patsubst %/, %/built-in.o, $(common-y))
 471
 472 # Build uboot
 473 # ---------------------------------------------------------------------------
 474 # uboot is built from the objects selected by $(uboot-init) and
 475 # $(uboot-main). Most are built-in.o files from top-level directories
 476 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 477 # Ordering when linking is important, and $(uboot-init) must be first.
 478 #
 479 # FIXME: This picture is wrong for U-Boot. We have no init, driver, mm
 480 #
 481 # uboot
 482 #   ^
 483 #   |
 484 #   +-< $(uboot-init)
 485 #   |   +--< init/version.o + more
 486 #   |
 487 #   +--< $(uboot-main)
 488 #   |    +--< driver/built-in.o mm/built-in.o + more
 489 #   |
 490 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 491 #
 492 # uboot version cannot be updated during normal
 493 # descending-into-subdirs phase since we do not yet know if we need to
 494 # update uboot.
 495 #
 496 # System.map is generated to document addresses of all kernel symbols
 497
 498 uboot-common := $(common-y)
 499 uboot-all    := $(uboot-common)
 500 uboot-lds    := $(lds-y)
 501
 502 # Rule to link uboot
 503 # May be overridden by arch/$(ARCH)/Makefile
 504 quiet_cmd_uboot__ ?= LD      $@
 505       cmd_uboot__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_uboot) -o $@ \
 506       -T $(uboot-lds) $(uboot-head)                         \
 507       --start-group $(uboot-common) --end-group                  \
 508       $(filter-out $(uboot-lds) $(uboot-common) FORCE ,$^)
 509
 510 # Generate new uboot version
 511 quiet_cmd_uboot_version = GEN     .version
 512       cmd_uboot_version = set -e;                     \
 513         if [ ! -r .version ]; then                      \
 514           rm -f .version;                               \
 515           echo 1 >.version;                             \
 516         else                                            \
 517           mv .version .old_version;                     \
 518           expr 0$$(cat .old_version) + 1 >.version;     \
 519         fi;                                             \
 520
 521
 522 # Generate System.map
 523 quiet_cmd_sysmap = SYSMAP
 524       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 525
 526 # Link of uboot
 527 # Generate System.map and verify that the content is consistent
 528 # Use + in front of the uboot_version rule to silent warning with make -j2
 529 # First command is ':' to allow us to use + in front of the rule
 530 define rule_uboot__
 531         :
 532
 533         $(call cmd,uboot__)
 534
 535         $(Q)echo 'cmd_$@ := $(cmd_uboot__)' > $(@D)/.$(@F).cmd
 536
 537         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 538           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 539         $(cmd_sysmap) $@ System.map;                                         \
 540         if [ $$? -ne 0 ]; then                                               \
 541                 rm -f $@;                                                    \
 542                 /bin/false;                                                  \
 543         fi;
 544 endef
 545
 546 ifdef CONFIG_KALLSYMS
 547 # Generate section listing all symbols and add it into uboot $(kallsyms.o)
 548 # It's a three stage process:
 549 # o .tmp_uboot1 has all symbols and sections, but __kallsyms is
 550 #   empty
 551 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 552 #   the right size - uboot version is updated during this step
 553 # o .tmp_uboot2 now has a __kallsyms section of the right size,
 554 #   but due to the added section, some addresses have shifted.
 555 #   From here, we generate a correct .tmp_kallsyms2.o
 556 # o The correct .tmp_kallsyms2.o is linked into the final uboot.
 557 # o Verify that the System.map from uboot matches the map from
 558 #   .tmp_uboot2, just in case we did not generate kallsyms correctly.
 559 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 560 #   .tmp_uboot3 and .tmp_kallsyms3.o.  This is only meant as a
 561 #   temporary bypass to allow the kernel to be built while the
 562 #   maintainers work out what went wrong with kallsyms.
 563
 564 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 565 last_kallsyms := 3
 566 else
 567 last_kallsyms := 2
 568 endif
 569
 570 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 571
 572 define verify_kallsyms
 573         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 574           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 575           $(cmd_sysmap) .tmp_uboot$(last_kallsyms) .tmp_System.map
 576         $(Q)cmp -s System.map .tmp_System.map ||                             \
 577                 (echo Inconsistent kallsyms data;                            \
 578                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 579                  rm .tmp_kallsyms* ; /bin/false )
 580 endef
 581
 582 # Update uboot version before link
 583 # Use + in front of this rule to silent warning about make -j1
 584 # First command is ':' to allow us to use + in front of this rule
 585 cmd_ksym_ld = $(cmd_uboot__)
 586 define rule_ksym_ld
 587         :
 588         +$(call cmd,uboot_version)
 589         $(call cmd,uboot__)
 590         $(Q)echo 'cmd_$@ := $(cmd_uboot__)' > $(@D)/.$(@F).cmd
 591 endef
 592
 593 # Generate .S file with all kernel symbols
 594 quiet_cmd_kallsyms = KSYM    $@
 595       cmd_kallsyms = $(NM) -g -n $< | $(KALLSYMS) > $@
 596
 597 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 598         $(call if_changed_dep,as_o_S)
 599
 600 .tmp_kallsyms%.S: .tmp_uboot% $(KALLSYMS)
 601         $(call cmd,kallsyms)
 602
 603 # .tmp_uboot1 must be complete except kallsyms, so update uboot version
 604 .tmp_uboot1: $(uboot-lds) $(uboot-all) FORCE
 605         $(call if_changed_rule,ksym_ld)
 606
 607 .tmp_uboot2: $(uboot-lds) $(uboot-all) .tmp_kallsyms1.o FORCE
 608         $(call if_changed,uboot__)
 609
 610 .tmp_uboot3: $(uboot-lds) $(uboot-all) .tmp_kallsyms2.o FORCE
 611         $(call if_changed,uboot__)
 612
 613 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 614 $(KALLSYMS): scripts ;
 615
 616 # Generate some data for debugging strange kallsyms problems
 617 debug_kallsyms: .tmp_map$(last_kallsyms)
 618
 619 .tmp_map%: .tmp_uboot% FORCE
 620         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 621
 622 .tmp_map3: .tmp_map2
 623
 624 .tmp_map2: .tmp_map1
 625
 626 endif # ifdef CONFIG_KALLSYMS
 627
 628 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 629 # relevant sections renamed as per the linker script.
 630 quiet_cmd_uboot-modpost = LD      $@
 631       cmd_uboot-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 632          $(vmlinux-init) --start-group $(uboot-main) --end-group             \
 633          $(filter-out $(uboot-init) $(uboot-main) $(uboot-lds) FORCE ,$^)
 634 define rule_uboot-modpost
 635         :
 636         +$(call cmd,uboot-modpost)
 637         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 638         $(Q)echo 'cmd_$@ := $(cmd_uboot-modpost)' > $(dot-target).cmd
 639 endef
 640
 641 uboot.bin: uboot
 642         $(Q)$(OBJCOPY) -O binary uboot uboot.bin
 643         $(Q)$(OBJDUMP) -d uboot > uboot.S
 644
 645 # uboot image
 646 uboot: $(uboot-lds) $(uboot-head) $(uboot-common) $(kallsyms.o) FORCE
 647         $(call uboot-modpost)
 648         $(call if_changed_rule,uboot__)
 649         $(Q)rm -f .old_version
 650
 651 # The actual objects are generated when descending,
 652 # make sure no implicit rule kicks in
 653 $(sort $(uboot-head) $(uboot-common) ) $(uboot-lds): $(uboot-dirs) ;
 654
 655 # Handle descending into subdirectories listed in $(uboot-dirs)
 656 # Preset locale variables to speed up the build process. Limit locale
 657 # tweaks to this spot to avoid wrong language settings when running
 658 # make menuconfig etc.
 659 # Error messages still appears in the original language
 660
 661 PHONY += $(uboot-dirs)
 662 $(uboot-dirs): prepare scripts
 663         $(Q)$(MAKE) $(build)=$@
 664
 665 # Build the kernel release string
 666 #
 667 # The KERNELRELEASE value built here is stored in the file
 668 # include/config/kernel.release, and is used when executing several
 669 # make targets, such as "make install" or "make modules_install."
 670 #
 671 # The eventual kernel release string consists of the following fields,
 672 # shown in a hierarchical format to show how smaller parts are concatenated
 673 # to form the larger and final value, with values coming from places like
 674 # the Makefile, kernel config options, make command line options and/or
 675 # SCM tag information.
 676 #
 677 #       $(KERNELVERSION)
 678 #         $(VERSION)                    eg, 2
 679 #         $(PATCHLEVEL)                 eg, 6
 680 #         $(SUBLEVEL)                   eg, 18
 681 #         $(EXTRAVERSION)               eg, -rc6
 682 #       $(localver-full)
 683 #         $(localver)
 684 #           localversion*               (all localversion* files)
 685 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 686 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 687 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 688 #           $(LOCALVERSION)             (from make command line if provided)
 689 #
 690 #  Note how the final $(localver-auto) string is included *only* if the
 691 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 692 # moment, only git is supported but other SCMs can edit the script
 693 # scripts/setlocalversion and add the appropriate checks as needed.
 694
 695 nullstring :=
 696 space      := $(nullstring) # end of line
 697
 698 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 699 __localver  = $(sort $(wildcard $(___localver)))
 700 # skip backup files (containing '~')
 701 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 702
 703 localver = $(subst $(space),, \
 704            $(shell cat /dev/null $(_localver)) \
 705            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 706
 707 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 708 # and if the SCM is know a tag from the SCM is appended.
 709 # The appended tag is determined by the SCM used.
 710 #
 711 # Currently, only git is supported.
 712 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 713 # checks as needed.
 714 ifdef CONFIG_LOCALVERSION_AUTO
 715         _localver-auto = $(shell $(CONFIG_SHELL) \
 716                           $(srctree)/scripts/setlocalversion $(srctree))
 717         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 718 endif
 719
 720 localver-full = $(localver)$(localver-auto)
 721
 722 # Store (new) KERNELRELASE string in include/config/kernel.release
 723 kernelrelease = $(KERNELVERSION)$(localver-full)
 724 include/config/kernel.release: include/config/auto.conf FORCE
 725         $(Q)rm -f $@
 726         $(Q)echo $(kernelrelease) > $@
 727
 728
 729 # Things we need to do before we recursively start building the kernel
 730 # or the modules are listed in "prepare".
 731 # A multi level approach is used. prepareN is processed before prepareN-1.
 732 # archprepare is used in arch Makefiles and when processed asm symlink,
 733 # version.h and scripts_basic is processed / created.
 734
 735 # Listed in dependency order
 736 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 737
 738 # prepare-all is deprecated, use prepare as valid replacement
 739 PHONY += prepare-all
 740
 741 # prepare3 is used to check if we are building in a separate output directory,
 742 # and if so do:
 743 # 1) Check that make has not been executed in the kernel src $(srctree)
 744 # 2) Create the include2 directory, used for the second asm symlink
 745 prepare3: include/config/kernel.release
 746 ifneq ($(KBUILD_SRC),)
 747         @echo '  Using $(srctree) as source for kernel'
 748         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 749                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 750                 echo "  in the '$(srctree)' directory.";\
 751                 /bin/false; \
 752         fi;
 753         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 754         $(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/u-boot.h ]; then  \
 755             ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 756             fi
 757 endif
 758
 759 # prepare2 creates a makefile if using a separate output directory
 760 prepare2: prepare3 outputmakefile
 761
 762 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 763                    include/asm include/config.h include/config/auto.conf
 764
 765 ifneq ($(KBUILD_MODULES),)
 766         $(Q)mkdir -p $(MODVERDIR)
 767         $(Q)rm -f $(MODVERDIR)/*
 768 endif
 769
 770 archprepare: prepare1 scripts_basic
 771
 772 prepare0: archprepare FORCE
 773         $(Q)$(MAKE) $(build)=.
 774
 775 # All the preparing..
 776 prepare prepare-all: prepare0
 777
 778 # Leave this as default for preprocessing uboot.lds.S, which is now
 779 # done in arch/$(ARCH)/kernel/Makefile
 780
 781 export CPPFLAGS_uboot.lds += -P -C -U$(ARCH)
 782
 783 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 784 # hard to detect, but I suppose "make mrproper" is a good idea
 785 # before switching between archs anyway.
 786
 787 define check-symlink
 788         set -e;                                                         \
 789         if [ -L include/asm ]; then                                     \
 790                 asmlink=`readlink include/asm | cut -d '-' -f 2`;       \
 791                 if [ "$$asmlink" != "$(SRCARCH)" ]; then                \
 792                         echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected";   \
 793                         echo "       set ARCH or save .config and run 'make mrproper' to fix it";               \
 794                         exit 1;                                         \
 795                 fi;                                                     \
 796         fi
 797 endef
 798
 799 # We create the target directory of the symlink if it does
 800 # not exist so the test in chack-symlink works and we have a
 801 # directory for generated filesas used by some architectures.
 802 define create-symlink
 803         if [ ! -L include/asm ]; then                                   \
 804                         echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';  \
 805                         if [ ! -d include/asm-$(SRCARCH) ]; then        \
 806                                 mkdir -p include/asm-$(SRCARCH);        \
 807                         fi;                                             \
 808                         ln -fsn asm-$(SRCARCH) $@;                      \
 809         fi
 810 endef
 811
 812 include/asm:
 813         $(Q)$(check-symlink)
 814         $(Q)$(create-symlink)
 815
 816 include/config.h: include/config/auto.conf
 817         @echo '  SYMLINK $@ -> board/$(board-y)/config.h'
 818 ifneq ($(KBUILD_SRC),)
 819         $(Q)ln -fsn $(srctree)/board/$(board-y)/config.h $@
 820 else
 821         @ln -fsn ../board/$(board-y)/config.h $@
 822 endif
 823
 824 # Generate some files
 825 # ---------------------------------------------------------------------------
 826
 827 # KERNELRELEASE can change from a few different places, meaning version.h
 828 # needs to be updated, so this check is forced on all builds
 829
 830 uts_len := 64
 831 define filechk_utsrelease.h
 832         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 833           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 834           exit 1;                                                         \
 835         fi;                                                               \
 836         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 837 endef
 838
 839 define filechk_version.h
 840         (echo \#define LINUX_VERSION_CODE $(shell                             \
 841         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 842         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 843 endef
 844
 845 include/linux/version.h: $(srctree)/Makefile FORCE
 846         $(call filechk,version.h)
 847
 848 include/linux/utsrelease.h: include/config/kernel.release FORCE
 849         $(call filechk,utsrelease.h)
 850
 851 # ---------------------------------------------------------------------------
 852
 853 PHONY += depend dep
 854 depend dep:
 855         @echo '*** Warning: make $@ is unnecessary now.'
 856
 857 # ---------------------------------------------------------------------------
 858 # Modules
 859
 860 ifdef CONFIG_MODULES
 861
 862 # By default, build modules as well
 863
 864 all: modules
 865
 866 #       Build modules
 867
 868 PHONY += modules
 869 modules: $(uboot-dirs) $(if $(KBUILD_BUILTIN),uboot)
 870         @echo '  Building modules, stage 2.';
 871         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 872
 873
 874 # Target to prepare building external modules
 875 PHONY += modules_prepare
 876 modules_prepare: prepare scripts
 877
 878 # Target to install modules
 879 PHONY += modules_install
 880 modules_install: _modinst_ _modinst_post
 881
 882 PHONY += _modinst_
 883 _modinst_:
 884         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 885                 echo "Warning: you may need to install module-init-tools"; \
 886                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 887                 sleep 1; \
 888         fi
 889         @rm -rf $(MODLIB)/kernel
 890         @rm -f $(MODLIB)/source
 891         @mkdir -p $(MODLIB)/kernel
 892         @ln -s $(srctree) $(MODLIB)/source
 893         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 894                 rm -f $(MODLIB)/build ; \
 895                 ln -s $(objtree) $(MODLIB)/build ; \
 896         fi
 897         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 898
 899 # If System.map exists, run depmod.  This deliberately does not have a
 900 # dependency on System.map since that would run the dependency tree on
 901 # vmlinux.  This depmod is only for convenience to give the initial
 902 # boot a modules.dep even before / is mounted read-write.  However the
 903 # boot script depmod is the master version.
 904 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 905 depmod_opts     :=
 906 else
 907 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 908 endif
 909 PHONY += _modinst_post
 910 _modinst_post: _modinst_
 911         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 912
 913 else # CONFIG_MODULES
 914
 915 # Modules not configured
 916 # ---------------------------------------------------------------------------
 917
 918 modules modules_install: FORCE
 919         @echo
 920         @echo "The present kernel configuration has modules disabled."
 921         @echo "Type 'make config' and enable loadable module support."
 922         @echo "Then build a kernel with module support enabled."
 923         @echo
 924         @exit 1
 925
 926 endif # CONFIG_MODULES
 927
 928 ###
 929 # Cleaning is done on three levels.
 930 # make clean     Delete most generated files
 931 #                Leave enough to build external modules
 932 # make mrproper  Delete the current configuration, and all generated files
 933 # make distclean Remove editor backup files, patch leftover files and the like
 934
 935 # Directories & files removed with 'make clean'
 936 CLEAN_DIRS  += $(MODVERDIR)
 937 CLEAN_FILES +=  uboot System.map include/uboot_default_env.h \
 938                 .tmp_version .tmp_uboot* uboot.bin uboot.S \
 939                 .tmp_kallsyms* uboot_default_env
 940
 941 # Directories & files removed with 'make mrproper'
 942 MRPROPER_DIRS  += include/config include2 usr/include
 943 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
 944                   include/linux/autoconf.h include/linux/version.h      \
 945                   include/linux/utsrelease.h include/config.h           \
 946                   Module.symvers tags TAGS cscope*
 947
 948 # clean - Delete most, but leave enough to build external modules
 949 #
 950 clean: rm-dirs  := $(CLEAN_DIRS)
 951 clean: rm-files := $(CLEAN_FILES)
 952 clean-dirs      := $(addprefix _clean_,$(srctree) $(uboot-alldirs))
 953
 954 PHONY += $(clean-dirs) clean archclean
 955 $(clean-dirs):
 956         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 957
 958 clean: archclean $(clean-dirs)
 959         $(call cmd,rmdirs)
 960         $(call cmd,rmfiles)
 961         @find . $(RCS_FIND_IGNORE) \
 962                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 963                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
 964                 -o -name '*.symtypes' \) \
 965                 -type f -print | xargs rm -f
 966
 967 # mrproper - Delete all generated files, including .config
 968 #
 969 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
 970 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
 971 mrproper-dirs      := $(addprefix _mrproper_,scripts)
 972
 973 PHONY += $(mrproper-dirs) mrproper archmrproper
 974 $(mrproper-dirs):
 975         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
 976
 977 mrproper: clean archmrproper $(mrproper-dirs)
 978         $(call cmd,rmdirs)
 979         $(call cmd,rmfiles)
 980
 981 # distclean
 982 #
 983 PHONY += distclean
 984
 985 distclean: mrproper
 986         @find $(srctree) $(RCS_FIND_IGNORE) \
 987                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 988                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 989                 -o -name '.*.rej' -o -size 0 \
 990                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
 991                 -type f -print | xargs rm -f
 992
 993
 994 # Packaging of the kernel to various formats
 995 # ---------------------------------------------------------------------------
 996 # rpm target kept for backward compatibility
 997 package-dir     := $(srctree)/scripts/package
 998
 999 %pkg: include/config/kernel.release FORCE
1000         $(Q)$(MAKE) $(build)=$(package-dir) $@
1001 rpm: include/config/kernel.release FORCE
1002         $(Q)$(MAKE) $(build)=$(package-dir) $@
1003
1004
1005 # Brief documentation of the typical targets used
1006 # ---------------------------------------------------------------------------
1007
1008 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1009 boards := $(notdir $(boards))
1010
1011 help:
1012         @echo  'Cleaning targets:'
1013         @echo  '  clean           - Remove most generated files but keep the config and'
1014         @echo  '                    enough build support to build external modules'
1015         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1016         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1017         @echo  '  docs            - start doxygen for all output types (only HTML - FIXME)'
1018         @echo  '    htmldocs      - create documentation in HTML format'
1019         @echo  ''
1020         @echo  'Configuration targets:'
1021         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1022         @echo  ''
1023         @echo  'Other generic targets:'
1024         @echo  '  all             - Build all targets marked with [*]'
1025         @echo  '* uboot           - Build the bare kernel'
1026         @echo  '  dir/            - Build all files in dir and below'
1027         @echo  '  dir/file.[ois]  - Build specified target only'
1028         @echo  '  dir/file.ko     - Build module including final link'
1029         @echo  '  tags/TAGS       - Generate tags file for editors'
1030         @echo  '  cscope          - Generate cscope index'
1031         @echo  '                    (default: $(INSTALL_HDR_PATH))'
1032         @echo  ''
1033         @echo  'Static analysers'
1034         @echo  '  checkstack      - Generate a list of stack hogs'
1035         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1036         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1037          echo  '  headers_check   - Sanity check on exported headers'; \
1038          fi
1039         @echo  ''
1040         @echo  'Architecture specific targets ($(ARCH)):'
1041         @$(if $(archhelp),$(archhelp),\
1042                 echo '  No architecture specific help defined for $(ARCH)')
1043         @echo  ''
1044         @$(if $(boards), \
1045                 $(foreach b, $(boards), \
1046                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1047                 echo '')
1048
1049         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1050         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1051         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1052         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1053         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1054         @echo  ''
1055         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1056         @echo  'For further info see the ./README file'
1057
1058 # Generate doxygen docs
1059 # ---------------------------------------------------------------------------
1060 .PHONY += docs htmldocs
1061
1062 docs : htmldocs
1063
1064 htmldocs:
1065         @echo  'Running doxygen with local Doxyfile'
1066         $(Q)doxygen Doxyfile
1067
1068 # Generate tags for editors
1069 # ---------------------------------------------------------------------------
1070
1071 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1072 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1073 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1074
1075 ifeq ($(src),$(obj))
1076 __srctree =
1077 else
1078 __srctree = $(srctree)/
1079 endif
1080
1081 ifeq ($(ALLSOURCE_ARCHS),)
1082 ifeq ($(ARCH),um)
1083 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1084 else
1085 ALLINCLUDE_ARCHS := $(ARCH)
1086 endif
1087 else
1088 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1089 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1090 endif
1091
1092 ALLSOURCE_ARCHS := $(ARCH)
1093
1094 define find-sources
1095         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1096                \( -name include -o -name arch \) -prune -o \
1097                -name $1 -print; \
1098           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1099                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1100                     -name $1 -print; \
1101           done ; \
1102           find $(__srctree)include $(RCS_FIND_IGNORE) \
1103                \( -name config -o -name 'asm-*' \) -prune \
1104                -o -name $1 -print; \
1105           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1106                test -e $(__srctree)include/asm-$${arch} && \
1107                  find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1108                    -name $1 -print; \
1109               test -e $(__srctree)arch/$${arch}/include/asm && \
1110                 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
1111                     -name $1 -print; \
1112           done ; \
1113           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1114                -name $1 -print )
1115 endef
1116
1117 define all-sources
1118         $(call find-sources,'*.[chS]')
1119 endef
1120 define all-kconfigs
1121         $(call find-sources,'Kconfig*')
1122 endef
1123 define all-defconfigs
1124         $(call find-sources,'defconfig')
1125 endef
1126
1127 define xtags
1128         if $1 --version 2>&1 | grep -iq exuberant; then \
1129             $(all-sources) | xargs $1 -a \
1130                 -I __initdata,__exitdata,__acquires,__releases \
1131                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1132                 --extra=+f --c-kinds=+px \
1133                 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1134             $(all-kconfigs) | xargs $1 -a \
1135                 --langdef=kconfig \
1136                 --language-force=kconfig \
1137                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1138             $(all-defconfigs) | xargs -r $1 -a \
1139                 --langdef=dotconfig \
1140                 --language-force=dotconfig \
1141                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1142         elif $1 --version 2>&1 | grep -iq emacs; then \
1143             $(all-sources) | xargs $1 -a; \
1144             $(all-kconfigs) | xargs $1 -a \
1145                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1146             $(all-defconfigs) | xargs -r $1 -a \
1147                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1148         else \
1149             $(all-sources) | xargs $1 -a; \
1150         fi
1151 endef
1152
1153 quiet_cmd_cscope-file = FILELST cscope.files
1154       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1155
1156 quiet_cmd_cscope = MAKE    cscope.out
1157       cmd_cscope = cscope -b
1158
1159 cscope: FORCE
1160         $(call cmd,cscope-file)
1161         $(call cmd,cscope)
1162
1163 quiet_cmd_TAGS = MAKE   $@
1164 define cmd_TAGS
1165         rm -f $@; \
1166         $(call xtags,etags)
1167 endef
1168
1169 TAGS: FORCE
1170         $(call cmd,TAGS)
1171
1172 quiet_cmd_tags = MAKE   $@
1173 define cmd_tags
1174         rm -f $@; \
1175         $(call xtags,ctags)
1176 endef
1177
1178 tags: FORCE
1179         $(call cmd,tags)
1180
1181
1182 endif #ifeq ($(config-targets),1)
1183 endif #ifeq ($(mixed-targets),1)
1184
1185 # Single targets
1186 # ---------------------------------------------------------------------------
1187 # Single targets are compatible with:
1188 # - build whith mixed source and output
1189 # - build with separate output dir 'make O=...'
1190 # - external modules
1191 #
1192 #  target-dir => where to store outputfile
1193 #  build-dir  => directory in kernel source tree to use
1194
1195 build-dir  = $(patsubst %/,%,$(dir $@))
1196 target-dir = $(dir $@)
1197
1198 %.s: %.c prepare scripts FORCE
1199         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1200 %.i: %.c prepare scripts FORCE
1201         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1202 %.o: %.c prepare scripts FORCE
1203         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1204 %.lst: %.c prepare scripts FORCE
1205         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1206 %.s: %.S prepare scripts FORCE
1207         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1208 %.o: %.S prepare scripts FORCE
1209         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1210 %.symtypes: %.c prepare scripts FORCE
1211         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1212
1213 # Modules
1214 / %/: prepare scripts FORCE
1215         $(Q)$(MAKE) $(build)=$(build-dir)
1216 %.ko: prepare scripts FORCE
1217         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1218         $(build)=$(build-dir) $(@:.ko=.o)
1219         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1220
1221 # FIXME Should go into a make.lib or something
1222 # ===========================================================================
1223
1224 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1225       cmd_rmdirs = rm -rf $(rm-dirs)
1226
1227 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1228       cmd_rmfiles = rm -f $(rm-files)
1229
1230
1231 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1232           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1233           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1234
1235 quiet_cmd_as_o_S = AS      $@
1236 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1237
1238 # read all saved command lines
1239
1240 targets := $(wildcard $(sort $(targets)))
1241 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1242
1243 ifneq ($(cmd_files),)
1244   $(cmd_files): ;       # Do not try to update included dependency files
1245   include $(cmd_files)
1246 endif
1247
1248 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1249 # Usage:
1250 # $(Q)$(MAKE) $(clean)=dir
1251 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1252
1253 endif   # skip-makefile
1254
1255 PHONY += FORCE
1256 FORCE:
1257
1258 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1259 Makefile: ;
1260
1261 # Declare the contents of the .PHONY variable as phony.  We keep that
1262 # information in a variable se we can use it in if_changed and friends.
1263 .PHONY: $(PHONY)
1264
1265 #
1266 # sanity checks for check default environemnt
1267 #
1268 ifdef CONFIG_DEFAULT_ENVIRONMENT
1269
1270 ifeq ($(CONFIG_DEFAULT_ENVIRONMENT_PATH),"")
1271 $(error default environment path empty))
1272 endif
1273
1274 saved-env_path := $(CONFIG_DEFAULT_ENVIRONMENT_PATH)
1275 CONFIG_DEFAULT_ENVIRONMENT_PATH := $(shell cd $(if $(filter /%,$(CONFIG_DEFAULT_ENVIRONMENT_PATH)),,$(srctree)/)$(CONFIG_DEFAULT_ENVIRONMENT_PATH) && /bin/pwd)
1276 $(if $(CONFIG_DEFAULT_ENVIRONMENT_PATH),, \
1277         $(error default environment path $(saved-env_path) does not exist))
1278
1279 endif # ifdef CONFIG_DEFAULT_ENVIRONMENT