Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 0
   3 SUBLEVEL = 0
   4 EXTRAVERSION =-rc9
   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
 172 KCONFIG_CONFIG  ?= .config
 173
 174 # SHELL used by kbuild
 175 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 176           else if [ -x /bin/bash ]; then echo /bin/bash; \
 177           else echo sh; fi ; fi)
 178
 179 HOSTCC       = gcc
 180 HOSTCXX      = g++
 181 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 182 HOSTCXXFLAGS = -O2
 183
 184 # Decide whether to build built-in, modular, or both.
 185 # Normally, just do built-in.
 186
 187 KBUILD_MODULES :=
 188 KBUILD_BUILTIN := 1
 189
 190 #       If we have only "make modules", don't compile built-in objects.
 191 #       When we're building modules with modversions, we need to consider
 192 #       the built-in objects during the descend as well, in order to
 193 #       make sure the checksums are up to date before we record them.
 194
 195 ifeq ($(MAKECMDGOALS),modules)
 196   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 197 endif
 198
 199 #       If we have "make <whatever> modules", compile modules
 200 #       in addition to whatever we do anyway.
 201 #       Just "make" or "make all" shall build modules as well
 202
 203 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 204   KBUILD_MODULES := 1
 205 endif
 206
 207 export KBUILD_MODULES KBUILD_BUILTIN
 208 export KBUILD_CHECKSRC KBUILD_SRC
 209
 210 # Beautify output
 211 # ---------------------------------------------------------------------------
 212 #
 213 # Normally, we echo the whole command before executing it. By making
 214 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 215 # $(quiet) to choose other forms of output instead, e.g.
 216 #
 217 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 218 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 219 #
 220 # If $(quiet) is empty, the whole command will be printed.
 221 # If it is set to "quiet_", only the short version will be printed.
 222 # If it is set to "silent_", nothing will be printed at all, since
 223 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 224 #
 225 # A simple variant is to prefix commands with $(Q) - that's useful
 226 # for commands that shall be hidden in non-verbose mode.
 227 #
 228 #       $(Q)ln $@ :<
 229 #
 230 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 231 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 232
 233 ifeq ($(KBUILD_VERBOSE),1)
 234   quiet =
 235   Q =
 236 else
 237   quiet=quiet_
 238   Q = @
 239 endif
 240
 241 # If the user is running make -s (silent mode), suppress echoing of
 242 # commands
 243
 244 ifneq ($(findstring s,$(MAKEFLAGS)),)
 245   quiet=silent_
 246 endif
 247
 248 export quiet Q KBUILD_VERBOSE
 249
 250
 251 # Look for make include files relative to root of kernel src
 252 MAKEFLAGS += --include-dir=$(srctree)
 253
 254 # We need some generic definitions.
 255 include $(srctree)/scripts/Kbuild.include
 256
 257 # Make variables (CC, etc...)
 258
 259 AS              = $(CROSS_COMPILE)as
 260 LD              = $(CROSS_COMPILE)ld
 261 CC              = $(CROSS_COMPILE)gcc
 262 CPP             = $(CC) -E
 263 AR              = $(CROSS_COMPILE)ar
 264 NM              = $(CROSS_COMPILE)nm
 265 STRIP           = $(CROSS_COMPILE)strip
 266 OBJCOPY         = $(CROSS_COMPILE)objcopy
 267 OBJDUMP         = $(CROSS_COMPILE)objdump
 268 AWK             = awk
 269 GENKSYMS        = scripts/genksyms/genksyms
 270 DEPMOD          = /sbin/depmod
 271 KALLSYMS        = scripts/kallsyms
 272 PERL            = perl
 273 CHECK           = sparse
 274
 275 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 276 CFLAGS_KERNEL   =
 277 AFLAGS_KERNEL   =
 278
 279 LDFLAGS_MODULE  = -T common/module.lds
 280
 281 # When compiling out-of-tree modules, put MODVERDIR in the module
 282 # tree rather than in the kernel tree. The kernel tree might
 283 # even be read-only.
 284 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 285
 286 # Use LINUXINCLUDE when you must reference the include/ directory.
 287 # Needed to be compatible with the O= option
 288 LINUXINCLUDE    := -Iinclude \
 289                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 290                    -include include/linux/autoconf.h
 291
 292 CPPFLAGS        := -D__KERNEL__ -D__U_BOOT__ $(LINUXINCLUDE) -fno-builtin -ffreestanding
 293
 294 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 295                    -fno-strict-aliasing -fno-common -Os -pipe
 296 AFLAGS          := -D__ASSEMBLY__
 297
 298 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 299 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 300 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 301
 302 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 303 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 304 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 305 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 306
 307 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 308 export CFLAGS CFLAGS_KERNEL
 309 export AFLAGS AFLAGS_KERNEL
 310
 311 # Files to ignore in find ... statements
 312
 313 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
 314 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 315
 316 # ===========================================================================
 317 # Rules shared between *config targets and build targets
 318
 319 # Basic helpers built in scripts/
 320 PHONY += scripts_basic
 321 scripts_basic:
 322         $(Q)$(MAKE) $(build)=scripts/basic
 323
 324 # To avoid any implicit rule to kick in, define an empty command.
 325 scripts/basic/%: scripts_basic ;
 326
 327 PHONY += outputmakefile
 328 # outputmakefile generates a Makefile in the output directory, if using a
 329 # separate output directory. This allows convenient use of make in the
 330 # output directory.
 331 outputmakefile:
 332 ifneq ($(KBUILD_SRC),)
 333         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 334             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 335 endif
 336
 337 # To make sure we do not include .config for any of the *config targets
 338 # catch them early, and hand them over to scripts/kconfig/Makefile
 339 # It is allowed to specify more targets when calling make, including
 340 # mixing *config targets and build targets.
 341 # For example 'make oldconfig all'.
 342 # Detect when mixed targets is specified, and make a second invocation
 343 # of make so .config is not included in this case either (for *config).
 344
 345 no-dot-config-targets := clean mrproper distclean \
 346                          cscope TAGS tags help %docs check% \
 347                          include/linux/version.h headers_% \
 348                          kernelrelease kernelversion
 349
 350 config-targets := 0
 351 mixed-targets  := 0
 352 dot-config     := 1
 353
 354 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 355         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 356                 dot-config := 0
 357         endif
 358 endif
 359
 360 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 361         config-targets := 1
 362         ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 363                 mixed-targets := 1
 364         endif
 365 endif
 366
 367 ifeq ($(mixed-targets),1)
 368 # ===========================================================================
 369 # We're called with mixed targets (*config and build targets).
 370 # Handle them one by one.
 371
 372 %:: FORCE
 373         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 374
 375 else
 376 ifeq ($(config-targets),1)
 377 # ===========================================================================
 378 # *config targets only - make sure prerequisites are updated, and descend
 379 # in scripts/kconfig to make the *config target
 380
 381 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 382 # KBUILD_DEFCONFIG may point out an alternative default configuration
 383 # used for 'make defconfig'
 384 include $(srctree)/arch/$(ARCH)/Makefile
 385 export KBUILD_DEFCONFIG
 386
 387 config %config: scripts_basic outputmakefile FORCE
 388         $(Q)mkdir -p include/linux include/config
 389         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 390
 391 else
 392 # ===========================================================================
 393 # Build targets only - this includes uboot, arch specific targets, clean
 394 # targets and others. In general all targets except *config targets.
 395
 396 # Additional helpers built in scripts/
 397 # Carefully list dependencies so we do not try to build scripts twice
 398 # in parallel
 399 PHONY += scripts
 400 scripts: scripts_basic include/config/auto.conf
 401         $(Q)$(MAKE) $(build)=$(@)
 402
 403 # Objects we will link into uboot / subdirs we need to visit
 404 common-y                := common/ drivers/ commands/ lib/ net/ fs/
 405
 406 ifeq ($(dot-config),1)
 407 # Read in config
 408 -include include/config/auto.conf
 409
 410 # Read in dependencies to all Kconfig* files, make sure to run
 411 # oldconfig if changes are detected.
 412 -include include/config/auto.conf.cmd
 413
 414 # To avoid any implicit rule to kick in, define an empty command
 415 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 416
 417 # If .config is newer than include/config/auto.conf, someone tinkered
 418 # with it and forgot to run make oldconfig.
 419 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 420 # we execute the config step to be sure to catch updated Kconfig files
 421 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 422         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 423
 424 else
 425 # Dummy target needed, because used as prerequisite
 426 include/config/auto.conf: ;
 427 endif # $(dot-config)
 428
 429 # The all: target is the default when no target is given on the
 430 # command line.
 431 # This allow a user to issue only 'make' to build a kernel
 432 # Defaults uboot but it is usually overridden in the arch makefile
 433 all: uboot.bin
 434
 435 include $(srctree)/arch/$(ARCH)/Makefile
 436
 437 ifdef CONFIG_DEBUG_INFO
 438 CFLAGS          += -g
 439 endif
 440
 441 # Force gcc to behave correct even for buggy distributions
 442 CFLAGS          += $(call cc-option, -fno-stack-protector)
 443
 444 # arch Makefile may override CC so keep this after arch Makefile is included
 445 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 446 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 447
 448 # warn about C99 declaration after statement
 449 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 450
 451 # disable pointer signed / unsigned warnings in gcc 4.0
 452 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 453
 454 # Default kernel image to build when no specific target is given.
 455 # KBUILD_IMAGE may be overruled on the command line or
 456 # set in the environment
 457 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 458 # this default value
 459 export KBUILD_IMAGE ?= uboot
 460
 461 uboot-dirs      := $(patsubst %/,%,$(filter %/, $(common-y)))
 462
 463 uboot-alldirs   := $(sort $(uboot-dirs) $(patsubst %/,%,$(filter %/, \
 464                      $(common-n) $(common-) \
 465                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 466                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 467
 468 common-y        := $(patsubst %/, %/built-in.o, $(common-y))
 469
 470 # Build uboot
 471 # ---------------------------------------------------------------------------
 472 # uboot is built from the objects selected by $(uboot-init) and
 473 # $(uboot-main). Most are built-in.o files from top-level directories
 474 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 475 # Ordering when linking is important, and $(uboot-init) must be first.
 476 #
 477 # FIXME: This picture is wrong for U-Boot. We have no init, driver, mm
 478 #
 479 # uboot
 480 #   ^
 481 #   |
 482 #   +-< $(uboot-init)
 483 #   |   +--< init/version.o + more
 484 #   |
 485 #   +--< $(uboot-main)
 486 #   |    +--< driver/built-in.o mm/built-in.o + more
 487 #   |
 488 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 489 #
 490 # uboot version cannot be updated during normal
 491 # descending-into-subdirs phase since we do not yet know if we need to
 492 # update uboot.
 493 #
 494 # System.map is generated to document addresses of all kernel symbols
 495
 496 uboot-common := $(common-y)
 497 uboot-all    := $(uboot-common)
 498 uboot-lds    := $(lds-y)
 499
 500 # Rule to link uboot
 501 # May be overridden by arch/$(ARCH)/Makefile
 502 quiet_cmd_uboot__ ?= LD      $@
 503       cmd_uboot__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_uboot) -o $@ \
 504       -T $(uboot-lds) $(uboot-head)                         \
 505       --start-group $(uboot-common) --end-group                  \
 506       $(filter-out $(uboot-lds) $(uboot-common) FORCE ,$^)
 507
 508 # Generate new uboot version
 509 quiet_cmd_uboot_version = GEN     .version
 510       cmd_uboot_version = set -e;                     \
 511         if [ ! -r .version ]; then                      \
 512           rm -f .version;                               \
 513           echo 1 >.version;                             \
 514         else                                            \
 515           mv .version .old_version;                     \
 516           expr 0$$(cat .old_version) + 1 >.version;     \
 517         fi;                                             \
 518
 519
 520 # Generate System.map
 521 quiet_cmd_sysmap = SYSMAP
 522       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 523
 524 # Link of uboot
 525 # Generate System.map and verify that the content is consistent
 526 # Use + in front of the uboot_version rule to silent warning with make -j2
 527 # First command is ':' to allow us to use + in front of the rule
 528 define rule_uboot__
 529         :
 530
 531         $(call cmd,uboot__)
 532
 533         $(Q)echo 'cmd_$@ := $(cmd_uboot__)' > $(@D)/.$(@F).cmd
 534
 535         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 536           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 537         $(cmd_sysmap) $@ System.map;                                         \
 538         if [ $$? -ne 0 ]; then                                               \
 539                 rm -f $@;                                                    \
 540                 /bin/false;                                                  \
 541         fi;
 542 endef
 543
 544 ifdef CONFIG_KALLSYMS
 545 # Generate section listing all symbols and add it into uboot $(kallsyms.o)
 546 # It's a three stage process:
 547 # o .tmp_uboot1 has all symbols and sections, but __kallsyms is
 548 #   empty
 549 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 550 #   the right size - uboot version is updated during this step
 551 # o .tmp_uboot2 now has a __kallsyms section of the right size,
 552 #   but due to the added section, some addresses have shifted.
 553 #   From here, we generate a correct .tmp_kallsyms2.o
 554 # o The correct .tmp_kallsyms2.o is linked into the final uboot.
 555 # o Verify that the System.map from uboot matches the map from
 556 #   .tmp_uboot2, just in case we did not generate kallsyms correctly.
 557 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 558 #   .tmp_uboot3 and .tmp_kallsyms3.o.  This is only meant as a
 559 #   temporary bypass to allow the kernel to be built while the
 560 #   maintainers work out what went wrong with kallsyms.
 561
 562 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 563 last_kallsyms := 3
 564 else
 565 last_kallsyms := 2
 566 endif
 567
 568 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 569
 570 define verify_kallsyms
 571         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 572           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 573           $(cmd_sysmap) .tmp_uboot$(last_kallsyms) .tmp_System.map
 574         $(Q)cmp -s System.map .tmp_System.map ||                             \
 575                 (echo Inconsistent kallsyms data;                            \
 576                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 577                  rm .tmp_kallsyms* ; /bin/false )
 578 endef
 579
 580 # Update uboot version before link
 581 # Use + in front of this rule to silent warning about make -j1
 582 # First command is ':' to allow us to use + in front of this rule
 583 cmd_ksym_ld = $(cmd_uboot__)
 584 define rule_ksym_ld
 585         :
 586         +$(call cmd,uboot_version)
 587         $(call cmd,uboot__)
 588         $(Q)echo 'cmd_$@ := $(cmd_uboot__)' > $(@D)/.$(@F).cmd
 589 endef
 590
 591 # Generate .S file with all kernel symbols
 592 quiet_cmd_kallsyms = KSYM    $@
 593       cmd_kallsyms = $(NM) -g -n $< | $(KALLSYMS) > $@
 594
 595 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 596         $(call if_changed_dep,as_o_S)
 597
 598 .tmp_kallsyms%.S: .tmp_uboot% $(KALLSYMS)
 599         $(call cmd,kallsyms)
 600
 601 # .tmp_uboot1 must be complete except kallsyms, so update uboot version
 602 .tmp_uboot1: $(uboot-lds) $(uboot-all) FORCE
 603         $(call if_changed_rule,ksym_ld)
 604
 605 .tmp_uboot2: $(uboot-lds) $(uboot-all) .tmp_kallsyms1.o FORCE
 606         $(call if_changed,uboot__)
 607
 608 .tmp_uboot3: $(uboot-lds) $(uboot-all) .tmp_kallsyms2.o FORCE
 609         $(call if_changed,uboot__)
 610
 611 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 612 $(KALLSYMS): scripts ;
 613
 614 # Generate some data for debugging strange kallsyms problems
 615 debug_kallsyms: .tmp_map$(last_kallsyms)
 616
 617 .tmp_map%: .tmp_uboot% FORCE
 618         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 619
 620 .tmp_map3: .tmp_map2
 621
 622 .tmp_map2: .tmp_map1
 623
 624 endif # ifdef CONFIG_KALLSYMS
 625
 626 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 627 # relevant sections renamed as per the linker script.
 628 quiet_cmd_uboot-modpost = LD      $@
 629       cmd_uboot-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 630          $(vmlinux-init) --start-group $(uboot-main) --end-group             \
 631          $(filter-out $(uboot-init) $(uboot-main) $(uboot-lds) FORCE ,$^)
 632 define rule_uboot-modpost
 633         :
 634         +$(call cmd,uboot-modpost)
 635         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 636         $(Q)echo 'cmd_$@ := $(cmd_uboot-modpost)' > $(dot-target).cmd
 637 endef
 638
 639 uboot.bin: uboot
 640         $(Q)$(OBJCOPY) -O binary uboot uboot.bin
 641         $(Q)$(OBJDUMP) -d uboot > uboot.S
 642
 643 # uboot image
 644 uboot: $(uboot-lds) $(uboot-head) $(uboot-common) $(kallsyms.o) FORCE
 645         $(call uboot-modpost)
 646         $(call if_changed_rule,uboot__)
 647         $(Q)rm -f .old_version
 648
 649 # The actual objects are generated when descending,
 650 # make sure no implicit rule kicks in
 651 $(sort $(uboot-head) $(uboot-common) ) $(uboot-lds): $(uboot-dirs) ;
 652
 653 # Handle descending into subdirectories listed in $(uboot-dirs)
 654 # Preset locale variables to speed up the build process. Limit locale
 655 # tweaks to this spot to avoid wrong language settings when running
 656 # make menuconfig etc.
 657 # Error messages still appears in the original language
 658
 659 PHONY += $(uboot-dirs)
 660 $(uboot-dirs): prepare scripts
 661         $(Q)$(MAKE) $(build)=$@
 662
 663 # Build the kernel release string
 664 #
 665 # The KERNELRELEASE value built here is stored in the file
 666 # include/config/kernel.release, and is used when executing several
 667 # make targets, such as "make install" or "make modules_install."
 668 #
 669 # The eventual kernel release string consists of the following fields,
 670 # shown in a hierarchical format to show how smaller parts are concatenated
 671 # to form the larger and final value, with values coming from places like
 672 # the Makefile, kernel config options, make command line options and/or
 673 # SCM tag information.
 674 #
 675 #       $(KERNELVERSION)
 676 #         $(VERSION)                    eg, 2
 677 #         $(PATCHLEVEL)                 eg, 6
 678 #         $(SUBLEVEL)                   eg, 18
 679 #         $(EXTRAVERSION)               eg, -rc6
 680 #       $(localver-full)
 681 #         $(localver)
 682 #           localversion*               (all localversion* files)
 683 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 684 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 685 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 686 #           $(LOCALVERSION)             (from make command line if provided)
 687 #
 688 #  Note how the final $(localver-auto) string is included *only* if the
 689 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 690 # moment, only git is supported but other SCMs can edit the script
 691 # scripts/setlocalversion and add the appropriate checks as needed.
 692
 693 nullstring :=
 694 space      := $(nullstring) # end of line
 695
 696 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 697 __localver  = $(sort $(wildcard $(___localver)))
 698 # skip backup files (containing '~')
 699 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 700
 701 localver = $(subst $(space),, \
 702            $(shell cat /dev/null $(_localver)) \
 703            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 704
 705 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 706 # and if the SCM is know a tag from the SCM is appended.
 707 # The appended tag is determined by the SCM used.
 708 #
 709 # Currently, only git is supported.
 710 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 711 # checks as needed.
 712 ifdef CONFIG_LOCALVERSION_AUTO
 713         _localver-auto = $(shell $(CONFIG_SHELL) \
 714                           $(srctree)/scripts/setlocalversion $(srctree))
 715         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 716 endif
 717
 718 localver-full = $(localver)$(localver-auto)
 719
 720 # Store (new) KERNELRELASE string in include/config/kernel.release
 721 kernelrelease = $(KERNELVERSION)$(localver-full)
 722 include/config/kernel.release: include/config/auto.conf FORCE
 723         $(Q)rm -f $@
 724         $(Q)echo $(kernelrelease) > $@
 725
 726
 727 # Things we need to do before we recursively start building the kernel
 728 # or the modules are listed in "prepare".
 729 # A multi level approach is used. prepareN is processed before prepareN-1.
 730 # archprepare is used in arch Makefiles and when processed asm symlink,
 731 # version.h and scripts_basic is processed / created.
 732
 733 # Listed in dependency order
 734 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 735
 736 # prepare-all is deprecated, use prepare as valid replacement
 737 PHONY += prepare-all
 738
 739 # prepare3 is used to check if we are building in a separate output directory,
 740 # and if so do:
 741 # 1) Check that make has not been executed in the kernel src $(srctree)
 742 # 2) Create the include2 directory, used for the second asm symlink
 743 prepare3: include/config/kernel.release
 744 ifneq ($(KBUILD_SRC),)
 745         @echo '  Using $(srctree) as source for kernel'
 746         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 747                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 748                 echo "  in the '$(srctree)' directory.";\
 749                 /bin/false; \
 750         fi;
 751         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 752         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 753 endif
 754
 755 # prepare2 creates a makefile if using a separate output directory
 756 prepare2: prepare3 outputmakefile
 757
 758 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 759                    include/asm include/config.h include/config/auto.conf
 760
 761 ifneq ($(KBUILD_MODULES),)
 762         $(Q)mkdir -p $(MODVERDIR)
 763         $(Q)rm -f $(MODVERDIR)/*
 764 endif
 765
 766 archprepare: prepare1 scripts_basic
 767
 768 prepare0: archprepare FORCE
 769         $(Q)$(MAKE) $(build)=.
 770
 771 # All the preparing..
 772 prepare prepare-all: prepare0
 773
 774 # Leave this as default for preprocessing uboot.lds.S, which is now
 775 # done in arch/$(ARCH)/kernel/Makefile
 776
 777 export CPPFLAGS_uboot.lds += -P -C -U$(ARCH)
 778
 779 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 780 # hard to detect, but I suppose "make mrproper" is a good idea
 781 # before switching between archs anyway.
 782
 783 include/asm:
 784         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 785         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 786         @ln -fsn asm-$(ARCH) $@
 787
 788 include/config.h: include/config/auto.conf
 789         @echo '  SYMLINK $@ -> board/$(board-y)/config.h'
 790 ifneq ($(KBUILD_SRC),)
 791         $(Q)ln -fsn $(srctree)/board/$(board-y)/config.h $@
 792 else
 793         @ln -fsn ../board/$(board-y)/config.h $@
 794 endif
 795
 796 # Generate some files
 797 # ---------------------------------------------------------------------------
 798
 799 # KERNELRELEASE can change from a few different places, meaning version.h
 800 # needs to be updated, so this check is forced on all builds
 801
 802 uts_len := 64
 803 define filechk_utsrelease.h
 804         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 805           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 806           exit 1;                                                         \
 807         fi;                                                               \
 808         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 809 endef
 810
 811 define filechk_version.h
 812         (echo \#define LINUX_VERSION_CODE $(shell                             \
 813         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 814         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 815 endef
 816
 817 include/linux/version.h: $(srctree)/Makefile FORCE
 818         $(call filechk,version.h)
 819
 820 include/linux/utsrelease.h: include/config/kernel.release FORCE
 821         $(call filechk,utsrelease.h)
 822
 823 # ---------------------------------------------------------------------------
 824
 825 PHONY += depend dep
 826 depend dep:
 827         @echo '*** Warning: make $@ is unnecessary now.'
 828
 829 # ---------------------------------------------------------------------------
 830 # Modules
 831
 832 ifdef CONFIG_MODULES
 833
 834 # By default, build modules as well
 835
 836 all: modules
 837
 838 #       Build modules
 839
 840 PHONY += modules
 841 modules: $(uboot-dirs) $(if $(KBUILD_BUILTIN),uboot)
 842         @echo '  Building modules, stage 2.';
 843         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 844
 845
 846 # Target to prepare building external modules
 847 PHONY += modules_prepare
 848 modules_prepare: prepare scripts
 849
 850 # Target to install modules
 851 PHONY += modules_install
 852 modules_install: _modinst_ _modinst_post
 853
 854 PHONY += _modinst_
 855 _modinst_:
 856         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 857                 echo "Warning: you may need to install module-init-tools"; \
 858                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 859                 sleep 1; \
 860         fi
 861         @rm -rf $(MODLIB)/kernel
 862         @rm -f $(MODLIB)/source
 863         @mkdir -p $(MODLIB)/kernel
 864         @ln -s $(srctree) $(MODLIB)/source
 865         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 866                 rm -f $(MODLIB)/build ; \
 867                 ln -s $(objtree) $(MODLIB)/build ; \
 868         fi
 869         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 870
 871 # If System.map exists, run depmod.  This deliberately does not have a
 872 # dependency on System.map since that would run the dependency tree on
 873 # vmlinux.  This depmod is only for convenience to give the initial
 874 # boot a modules.dep even before / is mounted read-write.  However the
 875 # boot script depmod is the master version.
 876 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 877 depmod_opts     :=
 878 else
 879 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 880 endif
 881 PHONY += _modinst_post
 882 _modinst_post: _modinst_
 883         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 884
 885 else # CONFIG_MODULES
 886
 887 # Modules not configured
 888 # ---------------------------------------------------------------------------
 889
 890 modules modules_install: FORCE
 891         @echo
 892         @echo "The present kernel configuration has modules disabled."
 893         @echo "Type 'make config' and enable loadable module support."
 894         @echo "Then build a kernel with module support enabled."
 895         @echo
 896         @exit 1
 897
 898 endif # CONFIG_MODULES
 899
 900 ###
 901 # Cleaning is done on three levels.
 902 # make clean     Delete most generated files
 903 #                Leave enough to build external modules
 904 # make mrproper  Delete the current configuration, and all generated files
 905 # make distclean Remove editor backup files, patch leftover files and the like
 906
 907 # Directories & files removed with 'make clean'
 908 CLEAN_DIRS  += $(MODVERDIR)
 909 CLEAN_FILES +=  uboot System.map include/uboot_default_env.h \
 910                 .tmp_version .tmp_uboot* uboot.bin uboot.S \
 911                 .tmp_kallsyms* uboot_default_env
 912
 913 # Directories & files removed with 'make mrproper'
 914 MRPROPER_DIRS  += include/config include2 usr/include
 915 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
 916                   include/linux/autoconf.h include/linux/version.h      \
 917                   include/linux/utsrelease.h include/config.h           \
 918                   Module.symvers tags TAGS cscope*
 919
 920 # clean - Delete most, but leave enough to build external modules
 921 #
 922 clean: rm-dirs  := $(CLEAN_DIRS)
 923 clean: rm-files := $(CLEAN_FILES)
 924 clean-dirs      := $(addprefix _clean_,$(srctree) $(uboot-alldirs))
 925
 926 PHONY += $(clean-dirs) clean archclean
 927 $(clean-dirs):
 928         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 929
 930 clean: archclean $(clean-dirs)
 931         $(call cmd,rmdirs)
 932         $(call cmd,rmfiles)
 933         @find . $(RCS_FIND_IGNORE) \
 934                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 935                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
 936                 -o -name '*.symtypes' \) \
 937                 -type f -print | xargs rm -f
 938
 939 # mrproper - Delete all generated files, including .config
 940 #
 941 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
 942 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
 943 mrproper-dirs      := $(addprefix _mrproper_,scripts)
 944
 945 PHONY += $(mrproper-dirs) mrproper archmrproper
 946 $(mrproper-dirs):
 947         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
 948
 949 mrproper: clean archmrproper $(mrproper-dirs)
 950         $(call cmd,rmdirs)
 951         $(call cmd,rmfiles)
 952
 953 # distclean
 954 #
 955 PHONY += distclean
 956
 957 distclean: mrproper
 958         @find $(srctree) $(RCS_FIND_IGNORE) \
 959                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 960                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 961                 -o -name '.*.rej' -o -size 0 \
 962                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
 963                 -type f -print | xargs rm -f
 964
 965
 966 # Packaging of the kernel to various formats
 967 # ---------------------------------------------------------------------------
 968 # rpm target kept for backward compatibility
 969 package-dir     := $(srctree)/scripts/package
 970
 971 %pkg: include/config/kernel.release FORCE
 972         $(Q)$(MAKE) $(build)=$(package-dir) $@
 973 rpm: include/config/kernel.release FORCE
 974         $(Q)$(MAKE) $(build)=$(package-dir) $@
 975
 976
 977 # Brief documentation of the typical targets used
 978 # ---------------------------------------------------------------------------
 979
 980 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
 981 boards := $(notdir $(boards))
 982
 983 help:
 984         @echo  'Cleaning targets:'
 985         @echo  '  clean           - Remove most generated files but keep the config and'
 986         @echo  '                    enough build support to build external modules'
 987         @echo  '  mrproper        - Remove all generated files + config + various backup files'
 988         @echo  '  distclean       - mrproper + remove editor backup and patch files'
 989         @echo  '  docs            - start doxygen for all output types (only HTML - FIXME)'
 990         @echo  '    htmldocs      - create documentation in HTML format'
 991         @echo  ''
 992         @echo  'Configuration targets:'
 993         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
 994         @echo  ''
 995         @echo  'Other generic targets:'
 996         @echo  '  all             - Build all targets marked with [*]'
 997         @echo  '* uboot           - Build the bare kernel'
 998         @echo  '  dir/            - Build all files in dir and below'
 999         @echo  '  dir/file.[ois]  - Build specified target only'
1000         @echo  '  dir/file.ko     - Build module including final link'
1001         @echo  '  tags/TAGS       - Generate tags file for editors'
1002         @echo  '  cscope          - Generate cscope index'
1003         @echo  '                    (default: $(INSTALL_HDR_PATH))'
1004         @echo  ''
1005         @echo  'Static analysers'
1006         @echo  '  checkstack      - Generate a list of stack hogs'
1007         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1008         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1009          echo  '  headers_check   - Sanity check on exported headers'; \
1010          fi
1011         @echo  ''
1012         @echo  'Architecture specific targets ($(ARCH)):'
1013         @$(if $(archhelp),$(archhelp),\
1014                 echo '  No architecture specific help defined for $(ARCH)')
1015         @echo  ''
1016         @$(if $(boards), \
1017                 $(foreach b, $(boards), \
1018                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1019                 echo '')
1020
1021         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1022         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1023         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1024         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1025         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1026         @echo  ''
1027         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1028         @echo  'For further info see the ./README file'
1029
1030 # Generate doxygen docs
1031 # ---------------------------------------------------------------------------
1032 .PHONY += docs htmldocs
1033
1034 docs : htmldocs
1035
1036 htmldocs:
1037         @echo  'Running doxygen with local Doxyfile'
1038         $(Q)doxygen Doxyfile
1039
1040 # Generate tags for editors
1041 # ---------------------------------------------------------------------------
1042
1043 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1044 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1045 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1046
1047 ifeq ($(src),$(obj))
1048 __srctree =
1049 else
1050 __srctree = $(srctree)/
1051 endif
1052
1053 ifeq ($(ALLSOURCE_ARCHS),)
1054 ifeq ($(ARCH),um)
1055 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1056 else
1057 ALLINCLUDE_ARCHS := $(ARCH)
1058 endif
1059 else
1060 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1061 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1062 endif
1063
1064 ALLSOURCE_ARCHS := $(ARCH)
1065
1066 define find-sources
1067         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1068                \( -name include -o -name arch \) -prune -o \
1069                -name $1 -print; \
1070           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1071                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1072                     -name $1 -print; \
1073           done ; \
1074           find $(__srctree)include $(RCS_FIND_IGNORE) \
1075                \( -name config -o -name 'asm-*' \) -prune \
1076                -o -name $1 -print; \
1077           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1078                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1079                     -name $1 -print; \
1080           done ; \
1081           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1082                -name $1 -print )
1083 endef
1084
1085 define all-sources
1086         $(call find-sources,'*.[chS]')
1087 endef
1088 define all-kconfigs
1089         $(call find-sources,'Kconfig*')
1090 endef
1091 define all-defconfigs
1092         $(call find-sources,'defconfig')
1093 endef
1094
1095 define xtags
1096         if $1 --version 2>&1 | grep -iq exuberant; then \
1097             $(all-sources) | xargs $1 -a \
1098                 -I __initdata,__exitdata,__acquires,__releases \
1099                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1100                 --extra=+f --c-kinds=+px \
1101                 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1102             $(all-kconfigs) | xargs $1 -a \
1103                 --langdef=kconfig \
1104                 --language-force=kconfig \
1105                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1106             $(all-defconfigs) | xargs -r $1 -a \
1107                 --langdef=dotconfig \
1108                 --language-force=dotconfig \
1109                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1110         elif $1 --version 2>&1 | grep -iq emacs; then \
1111             $(all-sources) | xargs $1 -a; \
1112             $(all-kconfigs) | xargs $1 -a \
1113                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1114             $(all-defconfigs) | xargs -r $1 -a \
1115                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1116         else \
1117             $(all-sources) | xargs $1 -a; \
1118         fi
1119 endef
1120
1121 quiet_cmd_cscope-file = FILELST cscope.files
1122       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1123
1124 quiet_cmd_cscope = MAKE    cscope.out
1125       cmd_cscope = cscope -b
1126
1127 cscope: FORCE
1128         $(call cmd,cscope-file)
1129         $(call cmd,cscope)
1130
1131 quiet_cmd_TAGS = MAKE   $@
1132 define cmd_TAGS
1133         rm -f $@; \
1134         $(call xtags,etags)
1135 endef
1136
1137 TAGS: FORCE
1138         $(call cmd,TAGS)
1139
1140 quiet_cmd_tags = MAKE   $@
1141 define cmd_tags
1142         rm -f $@; \
1143         $(call xtags,ctags)
1144 endef
1145
1146 tags: FORCE
1147         $(call cmd,tags)
1148
1149
1150 endif #ifeq ($(config-targets),1)
1151 endif #ifeq ($(mixed-targets),1)
1152
1153 # Single targets
1154 # ---------------------------------------------------------------------------
1155 # Single targets are compatible with:
1156 # - build whith mixed source and output
1157 # - build with separate output dir 'make O=...'
1158 # - external modules
1159 #
1160 #  target-dir => where to store outputfile
1161 #  build-dir  => directory in kernel source tree to use
1162
1163 build-dir  = $(patsubst %/,%,$(dir $@))
1164 target-dir = $(dir $@)
1165
1166 %.s: %.c prepare scripts FORCE
1167         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1168 %.i: %.c prepare scripts FORCE
1169         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1170 %.o: %.c prepare scripts FORCE
1171         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1172 %.lst: %.c prepare scripts FORCE
1173         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1174 %.s: %.S prepare scripts FORCE
1175         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1176 %.o: %.S prepare scripts FORCE
1177         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1178 %.symtypes: %.c prepare scripts FORCE
1179         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1180
1181 # Modules
1182 / %/: prepare scripts FORCE
1183         $(Q)$(MAKE) $(build)=$(build-dir)
1184 %.ko: prepare scripts FORCE
1185         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1186         $(build)=$(build-dir) $(@:.ko=.o)
1187         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1188
1189 # FIXME Should go into a make.lib or something
1190 # ===========================================================================
1191
1192 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1193       cmd_rmdirs = rm -rf $(rm-dirs)
1194
1195 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1196       cmd_rmfiles = rm -f $(rm-files)
1197
1198
1199 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1200           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1201           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1202
1203 quiet_cmd_as_o_S = AS      $@
1204 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1205
1206 # read all saved command lines
1207
1208 targets := $(wildcard $(sort $(targets)))
1209 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1210
1211 ifneq ($(cmd_files),)
1212   $(cmd_files): ;       # Do not try to update included dependency files
1213   include $(cmd_files)
1214 endif
1215
1216 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1217 # Usage:
1218 # $(Q)$(MAKE) $(clean)=dir
1219 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1220
1221 endif   # skip-makefile
1222
1223 PHONY += FORCE
1224 FORCE:
1225
1226 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1227 Makefile: ;
1228
1229 # Declare the contents of the .PHONY variable as phony.  We keep that
1230 # information in a variable se we can use it in if_changed and friends.
1231 .PHONY: $(PHONY)
1232
1233 #
1234 # sanity checks for check default environemnt
1235 #
1236 ifdef CONFIG_DEFAULT_ENVIRONMENT
1237
1238 ifeq ($(CONFIG_DEFAULT_ENVIRONMENT_PATH),"")
1239 $(error default environment path empty))
1240 endif
1241
1242 saved-env_path := $(CONFIG_DEFAULT_ENVIRONMENT_PATH)
1243 CONFIG_DEFAULT_ENVIRONMENT_PATH := $(shell cd $(if $(filter /%,$(CONFIG_DEFAULT_ENVIRONMENT_PATH)),,$(srctree)/)$(CONFIG_DEFAULT_ENVIRONMENT_PATH) && /bin/pwd)
1244 $(if $(CONFIG_DEFAULT_ENVIRONMENT_PATH),, \
1245         $(error default environment path $(saved-env_path) does not exist))
1246
1247 endif # ifdef CONFIG_DEFAULT_ENVIRONMENT