Makefile

   1 VERSION = 2010
   2 PATCHLEVEL = 08
   3 SUBLEVEL = 0
   4 EXTRAVERSION =
   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 barebox), 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                    -I$(objtree)/arch/$(ARCH)/include \
 293                    -include include/linux/autoconf.h
 294
 295 CPPFLAGS        := -D__KERNEL__ -D__BAREBOX__ $(LINUXINCLUDE) -fno-builtin -ffreestanding
 296
 297 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 298                    -fno-strict-aliasing -fno-common -Os -pipe
 299 AFLAGS          := -D__ASSEMBLY__
 300
 301 LDFLAGS         := -Map barebox.map
 302
 303 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 304 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 305 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 306
 307 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 308 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 309 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 310 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 311
 312 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 313 export CFLAGS CFLAGS_KERNEL
 314 export AFLAGS AFLAGS_KERNEL
 315
 316 # Files to ignore in find ... statements
 317
 318 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
 319 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 320
 321 # ===========================================================================
 322 # Rules shared between *config targets and build targets
 323
 324 # Basic helpers built in scripts/
 325 PHONY += scripts_basic
 326 scripts_basic:
 327         $(Q)$(MAKE) $(build)=scripts/basic
 328
 329 # To avoid any implicit rule to kick in, define an empty command.
 330 scripts/basic/%: scripts_basic ;
 331
 332 PHONY += outputmakefile
 333 # outputmakefile generates a Makefile in the output directory, if using a
 334 # separate output directory. This allows convenient use of make in the
 335 # output directory.
 336 outputmakefile:
 337 ifneq ($(KBUILD_SRC),)
 338         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 339             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 340 endif
 341
 342 # To make sure we do not include .config for any of the *config targets
 343 # catch them early, and hand them over to scripts/kconfig/Makefile
 344 # It is allowed to specify more targets when calling make, including
 345 # mixing *config targets and build targets.
 346 # For example 'make oldconfig all'.
 347 # Detect when mixed targets is specified, and make a second invocation
 348 # of make so .config is not included in this case either (for *config).
 349
 350 no-dot-config-targets := clean mrproper distclean \
 351                          cscope TAGS tags help %docs check% \
 352                          include/linux/version.h headers_% \
 353                          kernelrelease kernelversion
 354
 355 config-targets := 0
 356 mixed-targets  := 0
 357 dot-config     := 1
 358
 359 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 360         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 361                 dot-config := 0
 362         endif
 363 endif
 364
 365 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 366         config-targets := 1
 367         ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 368                 mixed-targets := 1
 369         endif
 370 endif
 371
 372 ifeq ($(mixed-targets),1)
 373 # ===========================================================================
 374 # We're called with mixed targets (*config and build targets).
 375 # Handle them one by one.
 376
 377 %:: FORCE
 378         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 379
 380 else
 381 ifeq ($(config-targets),1)
 382 # ===========================================================================
 383 # *config targets only - make sure prerequisites are updated, and descend
 384 # in scripts/kconfig to make the *config target
 385
 386 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 387 # KBUILD_DEFCONFIG may point out an alternative default configuration
 388 # used for 'make defconfig'
 389 include $(srctree)/arch/$(ARCH)/Makefile
 390 export KBUILD_DEFCONFIG
 391
 392 config %config: scripts_basic outputmakefile FORCE
 393         $(Q)mkdir -p include/linux include/config
 394         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 395
 396 else
 397 # ===========================================================================
 398 # Build targets only - this includes barebox, arch specific targets, clean
 399 # targets and others. In general all targets except *config targets.
 400
 401 # Additional helpers built in scripts/
 402 # Carefully list dependencies so we do not try to build scripts twice
 403 # in parallel
 404 PHONY += scripts
 405 scripts: scripts_basic include/config/auto.conf
 406         $(Q)$(MAKE) $(build)=$(@)
 407
 408 # Objects we will link into barebox / subdirs we need to visit
 409 common-y                := common/ drivers/ commands/ lib/ net/ fs/
 410
 411 ifeq ($(dot-config),1)
 412 # Read in config
 413 -include include/config/auto.conf
 414
 415 # Read in dependencies to all Kconfig* files, make sure to run
 416 # oldconfig if changes are detected.
 417 -include include/config/auto.conf.cmd
 418
 419 # To avoid any implicit rule to kick in, define an empty command
 420 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 421
 422 # If .config is newer than include/config/auto.conf, someone tinkered
 423 # with it and forgot to run make oldconfig.
 424 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 425 # we execute the config step to be sure to catch updated Kconfig files
 426 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 427         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 428
 429 else
 430 # Dummy target needed, because used as prerequisite
 431 include/config/auto.conf: ;
 432 endif # $(dot-config)
 433
 434 # The all: target is the default when no target is given on the
 435 # command line.
 436 # This allow a user to issue only 'make' to build a kernel
 437 # Defaults barebox but it is usually overridden in the arch makefile
 438 all: barebox.bin
 439
 440 include $(srctree)/arch/$(ARCH)/Makefile
 441
 442 ifdef CONFIG_DEBUG_INFO
 443 CFLAGS          += -g
 444 endif
 445
 446 # Force gcc to behave correct even for buggy distributions
 447 CFLAGS          += $(call cc-option, -fno-stack-protector)
 448
 449 # arch Makefile may override CC so keep this after arch Makefile is included
 450 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 451 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 452
 453 # warn about C99 declaration after statement
 454 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 455
 456 # disable pointer signed / unsigned warnings in gcc 4.0
 457 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 458
 459 # Default kernel image to build when no specific target is given.
 460 # KBUILD_IMAGE may be overruled on the command line or
 461 # set in the environment
 462 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 463 # this default value
 464 export KBUILD_IMAGE ?= barebox
 465
 466 barebox-dirs    := $(patsubst %/,%,$(filter %/, $(common-y)))
 467
 468 barebox-alldirs := $(sort $(barebox-dirs) $(patsubst %/,%,$(filter %/, \
 469                      $(common-n) $(common-) \
 470                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 471                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 472
 473 common-y        := $(patsubst %/, %/built-in.o, $(common-y))
 474
 475 # Build barebox
 476 # ---------------------------------------------------------------------------
 477 # barebox is built from the objects selected by $(barebox-init) and
 478 # $(barebox-main). Most are built-in.o files from top-level directories
 479 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 480 # Ordering when linking is important, and $(barebox-init) must be first.
 481 #
 482 # FIXME: This picture is wrong for barebox. We have no init, driver, mm
 483 #
 484 # barebox
 485 #   ^
 486 #   |
 487 #   +-< $(barebox-init)
 488 #   |   +--< init/version.o + more
 489 #   |
 490 #   +--< $(barebox-main)
 491 #   |    +--< driver/built-in.o mm/built-in.o + more
 492 #   |
 493 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 494 #
 495 # barebox version cannot be updated during normal
 496 # descending-into-subdirs phase since we do not yet know if we need to
 497 # update barebox.
 498 #
 499 # System.map is generated to document addresses of all kernel symbols
 500
 501 barebox-common := $(common-y)
 502 barebox-all    := $(barebox-common)
 503 barebox-lds    := $(lds-y)
 504
 505 # Rule to link barebox
 506 # May be overridden by arch/$(ARCH)/Makefile
 507 quiet_cmd_barebox__ ?= LD      $@
 508       cmd_barebox__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_barebox) -o $@ \
 509       -T $(barebox-lds) $(barebox-head)                         \
 510       --start-group $(barebox-common) --end-group                  \
 511       $(filter-out $(barebox-lds) $(barebox-common) FORCE ,$^)
 512
 513 # Generate new barebox version
 514 quiet_cmd_barebox_version = GEN     .version
 515       cmd_barebox_version = set -e;                     \
 516         if [ ! -r .version ]; then                      \
 517           rm -f .version;                               \
 518           echo 1 >.version;                             \
 519         else                                            \
 520           mv .version .old_version;                     \
 521           expr 0$$(cat .old_version) + 1 >.version;     \
 522         fi;                                             \
 523
 524
 525 # Generate System.map
 526 quiet_cmd_sysmap = SYSMAP
 527       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 528
 529 # Link of barebox
 530 # Generate System.map and verify that the content is consistent
 531 # Use + in front of the barebox_version rule to silent warning with make -j2
 532 # First command is ':' to allow us to use + in front of the rule
 533 define rule_barebox__
 534         :
 535
 536         $(call cmd,barebox__)
 537
 538         $(Q)echo 'cmd_$@ := $(cmd_barebox__)' > $(@D)/.$(@F).cmd
 539
 540         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 541           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 542         $(cmd_sysmap) $@ System.map;                                         \
 543         if [ $$? -ne 0 ]; then                                               \
 544                 rm -f $@;                                                    \
 545                 /bin/false;                                                  \
 546         fi;
 547 endef
 548
 549 ifdef CONFIG_KALLSYMS
 550 # Generate section listing all symbols and add it into barebox $(kallsyms.o)
 551 # It's a three stage process:
 552 # o .tmp_barebox1 has all symbols and sections, but __kallsyms is
 553 #   empty
 554 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 555 #   the right size - barebox version is updated during this step
 556 # o .tmp_barebox2 now has a __kallsyms section of the right size,
 557 #   but due to the added section, some addresses have shifted.
 558 #   From here, we generate a correct .tmp_kallsyms2.o
 559 # o The correct .tmp_kallsyms2.o is linked into the final barebox.
 560 # o Verify that the System.map from barebox matches the map from
 561 #   .tmp_barebox2, just in case we did not generate kallsyms correctly.
 562 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 563 #   .tmp_barebox3 and .tmp_kallsyms3.o.  This is only meant as a
 564 #   temporary bypass to allow the kernel to be built while the
 565 #   maintainers work out what went wrong with kallsyms.
 566
 567 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 568 last_kallsyms := 3
 569 else
 570 last_kallsyms := 2
 571 endif
 572
 573 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 574
 575 define verify_kallsyms
 576         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 577           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 578           $(cmd_sysmap) .tmp_barebox$(last_kallsyms) .tmp_System.map
 579         $(Q)cmp -s System.map .tmp_System.map ||                             \
 580                 (echo Inconsistent kallsyms data;                            \
 581                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 582                  rm .tmp_kallsyms* ; /bin/false )
 583 endef
 584
 585 # Update barebox version before link
 586 # Use + in front of this rule to silent warning about make -j1
 587 # First command is ':' to allow us to use + in front of this rule
 588 cmd_ksym_ld = $(cmd_barebox__)
 589 define rule_ksym_ld
 590         :
 591         +$(call cmd,barebox_version)
 592         $(call cmd,barebox__)
 593         $(Q)echo 'cmd_$@ := $(cmd_barebox__)' > $(@D)/.$(@F).cmd
 594 endef
 595
 596 # Generate .S file with all kernel symbols
 597 quiet_cmd_kallsyms = KSYM    $@
 598       cmd_kallsyms = $(NM) -g -n $< | $(KALLSYMS) > $@
 599
 600 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 601         $(call if_changed_dep,as_o_S)
 602
 603 .tmp_kallsyms%.S: .tmp_barebox% $(KALLSYMS)
 604         $(call cmd,kallsyms)
 605
 606 # .tmp_barebox1 must be complete except kallsyms, so update barebox version
 607 .tmp_barebox1: $(barebox-lds) $(barebox-all) FORCE
 608         $(call if_changed_rule,ksym_ld)
 609
 610 .tmp_barebox2: $(barebox-lds) $(barebox-all) .tmp_kallsyms1.o FORCE
 611         $(call if_changed,barebox__)
 612
 613 .tmp_barebox3: $(barebox-lds) $(barebox-all) .tmp_kallsyms2.o FORCE
 614         $(call if_changed,barebox__)
 615
 616 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 617 $(KALLSYMS): scripts ;
 618
 619 # Generate some data for debugging strange kallsyms problems
 620 debug_kallsyms: .tmp_map$(last_kallsyms)
 621
 622 .tmp_map%: .tmp_barebox% FORCE
 623         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 624
 625 .tmp_map3: .tmp_map2
 626
 627 .tmp_map2: .tmp_map1
 628
 629 endif # ifdef CONFIG_KALLSYMS
 630
 631 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 632 # relevant sections renamed as per the linker script.
 633 quiet_cmd_barebox-modpost = LD      $@
 634       cmd_barebox-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 635          $(vmlinux-init) --start-group $(barebox-main) --end-group             \
 636          $(filter-out $(barebox-init) $(barebox-main) $(barebox-lds) FORCE ,$^)
 637 define rule_barebox-modpost
 638         :
 639         +$(call cmd,barebox-modpost)
 640         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 641         $(Q)echo 'cmd_$@ := $(cmd_barebox-modpost)' > $(dot-target).cmd
 642 endef
 643
 644 quiet_cmd_objcopy = OBJCOPY $@
 645       cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
 646
 647 OBJCOPYFLAGS_barebox.bin = -O binary
 648
 649 barebox.bin: barebox FORCE
 650         $(call if_changed,objcopy)
 651
 652 ifdef CONFIG_X86
 653 barebox.S: barebox
 654 ifdef CONFIG_X86_HDBOOT
 655         @echo "-------------------------------------------------" > barebox.S
 656         @echo " * MBR content" >> barebox.S
 657         $(Q)$(OBJDUMP) -j .bootsector -mi8086 -d barebox >> barebox.S
 658         @echo "-------------------------------------------------" >> barebox.S
 659         @echo " * Boot loader content" >> barebox.S
 660         $(Q)$(OBJDUMP) -j .bootstrapping -mi8086 -d barebox >> barebox.S
 661 endif
 662         @echo "-------------------------------------------------" >> barebox.S
 663         @echo " * Regular Text content" >> barebox.S
 664         $(Q)$(OBJDUMP) -j .text -d barebox >> barebox.S
 665         @echo "-------------------------------------------------" >> barebox.S
 666         @echo " * Regular Data content" >> barebox.S
 667         $(Q)$(OBJDUMP) -j .data -d barebox >> barebox.S
 668         @echo "-------------------------------------------------" >> barebox.S
 669         @echo " * Commands content" >> barebox.S
 670         $(Q)$(OBJDUMP) -j .barebox_cmd -d barebox >> barebox.S
 671         @echo "-------------------------------------------------" >> barebox.S
 672         @echo " * Init Calls content" >> barebox.S
 673         $(Q)$(OBJDUMP) -j .barebox_initcalls -d barebox >> barebox.S
 674 else
 675 quiet_cmd_disasm = DISASM  $@
 676       cmd_disasm = $(OBJDUMP) -d $< > $@
 677
 678 barebox.S: barebox FORCE
 679         $(call if_changed,disasm)
 680 endif
 681
 682 # barebox image
 683 barebox: $(barebox-lds) $(barebox-head) $(barebox-common) $(kallsyms.o) FORCE
 684         $(call barebox-modpost)
 685         $(call if_changed_rule,barebox__)
 686         $(Q)rm -f .old_version
 687
 688 # The actual objects are generated when descending,
 689 # make sure no implicit rule kicks in
 690 $(sort $(barebox-head) $(barebox-common) ) $(barebox-lds): $(barebox-dirs) ;
 691
 692 # Handle descending into subdirectories listed in $(barebox-dirs)
 693 # Preset locale variables to speed up the build process. Limit locale
 694 # tweaks to this spot to avoid wrong language settings when running
 695 # make menuconfig etc.
 696 # Error messages still appears in the original language
 697
 698 PHONY += $(barebox-dirs)
 699 $(barebox-dirs): prepare scripts
 700         $(Q)$(MAKE) $(build)=$@
 701
 702 # Build the kernel release string
 703 #
 704 # The KERNELRELEASE value built here is stored in the file
 705 # include/config/kernel.release, and is used when executing several
 706 # make targets, such as "make install" or "make modules_install."
 707 #
 708 # The eventual kernel release string consists of the following fields,
 709 # shown in a hierarchical format to show how smaller parts are concatenated
 710 # to form the larger and final value, with values coming from places like
 711 # the Makefile, kernel config options, make command line options and/or
 712 # SCM tag information.
 713 #
 714 #       $(KERNELVERSION)
 715 #         $(VERSION)                    eg, 2
 716 #         $(PATCHLEVEL)                 eg, 6
 717 #         $(SUBLEVEL)                   eg, 18
 718 #         $(EXTRAVERSION)               eg, -rc6
 719 #       $(localver-full)
 720 #         $(localver)
 721 #           localversion*               (all localversion* files)
 722 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 723 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 724 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 725 #           $(LOCALVERSION)             (from make command line if provided)
 726 #
 727 #  Note how the final $(localver-auto) string is included *only* if the
 728 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 729 # moment, only git is supported but other SCMs can edit the script
 730 # scripts/setlocalversion and add the appropriate checks as needed.
 731
 732 nullstring :=
 733 space      := $(nullstring) # end of line
 734
 735 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 736 __localver  = $(sort $(wildcard $(___localver)))
 737 # skip backup files (containing '~')
 738 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 739
 740 localver = $(subst $(space),, \
 741            $(shell cat /dev/null $(_localver)) \
 742            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 743
 744 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 745 # and if the SCM is know a tag from the SCM is appended.
 746 # The appended tag is determined by the SCM used.
 747 #
 748 # Currently, only git is supported.
 749 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 750 # checks as needed.
 751 ifdef CONFIG_LOCALVERSION_AUTO
 752         _localver-auto = $(shell $(CONFIG_SHELL) \
 753                           $(srctree)/scripts/setlocalversion $(srctree))
 754         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 755 endif
 756
 757 localver-full = $(localver)$(localver-auto)
 758
 759 # Store (new) KERNELRELASE string in include/config/kernel.release
 760 kernelrelease = $(KERNELVERSION)$(localver-full)
 761 include/config/kernel.release: include/config/auto.conf FORCE
 762         $(Q)rm -f $@
 763         $(Q)echo $(kernelrelease) > $@
 764
 765
 766 # Things we need to do before we recursively start building the kernel
 767 # or the modules are listed in "prepare".
 768 # A multi level approach is used. prepareN is processed before prepareN-1.
 769 # archprepare is used in arch Makefiles and when processed asm symlink,
 770 # version.h and scripts_basic is processed / created.
 771
 772 # Listed in dependency order
 773 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 774
 775 # prepare-all is deprecated, use prepare as valid replacement
 776 PHONY += prepare-all
 777
 778 # prepare3 is used to check if we are building in a separate output directory,
 779 # and if so do:
 780 # 1) Check that make has not been executed in the kernel src $(srctree)
 781 # 2) Create the include2 directory, used for the second asm symlink
 782 prepare3: include/config/kernel.release
 783 ifneq ($(KBUILD_SRC),)
 784         @echo '  Using $(srctree) as source for kernel'
 785         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 786                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 787                 echo "  in the '$(srctree)' directory.";\
 788                 /bin/false; \
 789         fi;
 790         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 791         $(Q)if [ -e $(srctree)/include/asm-$(SRCARCH)/barebox.h ]; then  \
 792             ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 793             fi
 794 endif
 795
 796 # prepare2 creates a makefile if using a separate output directory
 797 prepare2: prepare3 outputmakefile
 798
 799 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 800                    include/asm include/config.h include/config/auto.conf
 801
 802 ifneq ($(KBUILD_MODULES),)
 803         $(Q)mkdir -p $(MODVERDIR)
 804         $(Q)rm -f $(MODVERDIR)/*
 805 endif
 806
 807 archprepare: prepare1 scripts_basic
 808
 809 prepare0: archprepare FORCE
 810         $(Q)$(MAKE) $(build)=.
 811
 812 # All the preparing..
 813 prepare prepare-all: prepare0
 814
 815 # Leave this as default for preprocessing barebox.lds.S, which is now
 816 # done in arch/$(ARCH)/kernel/Makefile
 817
 818 export CPPFLAGS_barebox.lds += -P -C -U$(ARCH)
 819
 820 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 821 # hard to detect, but I suppose "make mrproper" is a good idea
 822 # before switching between archs anyway.
 823
 824 define check-symlink
 825         set -e;                                                         \
 826         if [ -L include/asm ]; then                                     \
 827                 asmlink=`readlink include/asm | cut -d '-' -f 2`;       \
 828                 if [ "$$asmlink" != "$(SRCARCH)" ]; then                \
 829                         echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected";   \
 830                         echo "       set ARCH or save .config and run 'make mrproper' to fix it";               \
 831                         exit 1;                                         \
 832                 fi;                                                     \
 833         fi
 834 endef
 835
 836 # We create the target directory of the symlink if it does
 837 # not exist so the test in chack-symlink works and we have a
 838 # directory for generated filesas used by some architectures.
 839 define create-symlink
 840         if [ ! -L include/asm ]; then                                   \
 841                         echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';  \
 842                         if [ ! -d include/asm-$(SRCARCH) ]; then        \
 843                                 mkdir -p include/asm-$(SRCARCH);        \
 844                         fi;                                             \
 845                         ln -fsn asm-$(SRCARCH) $@;                      \
 846         fi
 847 endef
 848
 849 include/asm:
 850         $(Q)$(check-symlink)
 851         $(Q)$(create-symlink)
 852
 853 include/config.h: include/config/auto.conf
 854         @echo '  SYMLINK $@ -> $(BOARD)/config.h'
 855 ifneq ($(KBUILD_SRC),)
 856         $(Q)ln -fsn $(srctree)/$(BOARD)/config.h $@
 857 else
 858         @ln -fsn ../$(BOARD)/config.h $@
 859 endif
 860
 861 # Generate some files
 862 # ---------------------------------------------------------------------------
 863
 864 # KERNELRELEASE can change from a few different places, meaning version.h
 865 # needs to be updated, so this check is forced on all builds
 866
 867 uts_len := 64
 868 define filechk_utsrelease.h
 869         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 870           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 871           exit 1;                                                         \
 872         fi;                                                               \
 873         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 874 endef
 875
 876 define filechk_version.h
 877         (echo \#define LINUX_VERSION_CODE $(shell                             \
 878         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 879         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 880 endef
 881
 882 include/linux/version.h: $(srctree)/Makefile FORCE
 883         $(call filechk,version.h)
 884
 885 include/linux/utsrelease.h: include/config/kernel.release FORCE
 886         $(call filechk,utsrelease.h)
 887
 888 # ---------------------------------------------------------------------------
 889
 890 PHONY += depend dep
 891 depend dep:
 892         @echo '*** Warning: make $@ is unnecessary now.'
 893
 894 # ---------------------------------------------------------------------------
 895 # Modules
 896
 897 ifdef CONFIG_MODULES
 898
 899 # By default, build modules as well
 900
 901 all: modules
 902
 903 #       Build modules
 904
 905 PHONY += modules
 906 modules: $(barebox-dirs) $(if $(KBUILD_BUILTIN),barebox)
 907         @echo '  Building modules, stage 2.';
 908         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 909
 910
 911 # Target to prepare building external modules
 912 PHONY += modules_prepare
 913 modules_prepare: prepare scripts
 914
 915 # Target to install modules
 916 PHONY += modules_install
 917 modules_install: _modinst_ _modinst_post
 918
 919 PHONY += _modinst_
 920 _modinst_:
 921         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 922                 echo "Warning: you may need to install module-init-tools"; \
 923                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 924                 sleep 1; \
 925         fi
 926         @rm -rf $(MODLIB)/kernel
 927         @rm -f $(MODLIB)/source
 928         @mkdir -p $(MODLIB)/kernel
 929         @ln -s $(srctree) $(MODLIB)/source
 930         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 931                 rm -f $(MODLIB)/build ; \
 932                 ln -s $(objtree) $(MODLIB)/build ; \
 933         fi
 934         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 935
 936 # If System.map exists, run depmod.  This deliberately does not have a
 937 # dependency on System.map since that would run the dependency tree on
 938 # vmlinux.  This depmod is only for convenience to give the initial
 939 # boot a modules.dep even before / is mounted read-write.  However the
 940 # boot script depmod is the master version.
 941 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 942 depmod_opts     :=
 943 else
 944 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 945 endif
 946 PHONY += _modinst_post
 947 _modinst_post: _modinst_
 948         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 949
 950 else # CONFIG_MODULES
 951
 952 # Modules not configured
 953 # ---------------------------------------------------------------------------
 954
 955 modules modules_install: FORCE
 956         @echo
 957         @echo "The present kernel configuration has modules disabled."
 958         @echo "Type 'make config' and enable loadable module support."
 959         @echo "Then build a kernel with module support enabled."
 960         @echo
 961         @exit 1
 962
 963 endif # CONFIG_MODULES
 964
 965 ###
 966 # Cleaning is done on three levels.
 967 # make clean     Delete most generated files
 968 #                Leave enough to build external modules
 969 # make mrproper  Delete the current configuration, and all generated files
 970 # make distclean Remove editor backup files, patch leftover files and the like
 971
 972 # Directories & files removed with 'make clean'
 973 CLEAN_DIRS  += $(MODVERDIR)
 974 CLEAN_FILES +=  barebox System.map include/barebox_default_env.h \
 975                 .tmp_version .tmp_barebox* barebox.bin barebox.S \
 976                 .tmp_kallsyms* barebox_default_env barebox.ldr
 977
 978 # Directories & files removed with 'make mrproper'
 979 MRPROPER_DIRS  += include/config include2 usr/include
 980 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
 981                   include/linux/autoconf.h include/linux/version.h      \
 982                   include/linux/utsrelease.h include/config.h           \
 983                   Module.symvers tags TAGS cscope*
 984
 985 # clean - Delete most, but leave enough to build external modules
 986 #
 987 clean: rm-dirs  := $(CLEAN_DIRS)
 988 clean: rm-files := $(CLEAN_FILES)
 989 clean-dirs      := $(addprefix _clean_,$(srctree) $(barebox-alldirs))
 990
 991 PHONY += $(clean-dirs) clean archclean
 992 $(clean-dirs):
 993         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 994
 995 clean: archclean $(clean-dirs)
 996         $(call cmd,rmdirs)
 997         $(call cmd,rmfiles)
 998         @find . $(RCS_FIND_IGNORE) \
 999                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1000                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1001                 -o -name '*.symtypes' \) \
1002                 -type f -print | xargs rm -f
1003
1004 # mrproper - Delete all generated files, including .config
1005 #
1006 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1007 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1008 mrproper-dirs      := $(addprefix _mrproper_,scripts)
1009
1010 PHONY += $(mrproper-dirs) mrproper archmrproper
1011 $(mrproper-dirs):
1012         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1013
1014 mrproper: clean archmrproper $(mrproper-dirs)
1015         $(call cmd,rmdirs)
1016         $(call cmd,rmfiles)
1017
1018 # distclean
1019 #
1020 PHONY += distclean
1021
1022 distclean: mrproper
1023         @find $(srctree) $(RCS_FIND_IGNORE) \
1024                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1025                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1026                 -o -name '.*.rej' -o -size 0 \
1027                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1028                 -type f -print | xargs rm -f
1029
1030
1031 # Packaging of the kernel to various formats
1032 # ---------------------------------------------------------------------------
1033 # rpm target kept for backward compatibility
1034 package-dir     := $(srctree)/scripts/package
1035
1036 %pkg: include/config/kernel.release FORCE
1037         $(Q)$(MAKE) $(build)=$(package-dir) $@
1038 rpm: include/config/kernel.release FORCE
1039         $(Q)$(MAKE) $(build)=$(package-dir) $@
1040
1041
1042 # Brief documentation of the typical targets used
1043 # ---------------------------------------------------------------------------
1044
1045 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1046 boards := $(notdir $(boards))
1047
1048 help:
1049         @echo  'Cleaning targets:'
1050         @echo  '  clean           - Remove most generated files but keep the config and'
1051         @echo  '                    enough build support to build external modules'
1052         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1053         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1054         @echo  '  docs            - start doxygen for all output types (only HTML - FIXME)'
1055         @echo  '    htmldocs      - create documentation in HTML format'
1056         @echo  ''
1057         @echo  'Configuration targets:'
1058         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1059         @echo  ''
1060         @echo  'Other generic targets:'
1061         @echo  '  all             - Build all targets marked with [*]'
1062         @echo  '* barebox           - Build the bare kernel'
1063         @echo  '  dir/            - Build all files in dir and below'
1064         @echo  '  dir/file.[ois]  - Build specified target only'
1065         @echo  '  dir/file.ko     - Build module including final link'
1066         @echo  '  tags/TAGS       - Generate tags file for editors'
1067         @echo  '  cscope          - Generate cscope index'
1068         @echo  '                    (default: $(INSTALL_HDR_PATH))'
1069         @echo  ''
1070         @echo  'Static analysers'
1071         @echo  '  checkstack      - Generate a list of stack hogs'
1072         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1073         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1074          echo  '  headers_check   - Sanity check on exported headers'; \
1075          fi
1076         @echo  ''
1077         @echo  'Architecture specific targets ($(ARCH)):'
1078         @$(if $(archhelp),$(archhelp),\
1079                 echo '  No architecture specific help defined for $(ARCH)')
1080         @echo  ''
1081         @$(if $(boards), \
1082                 $(foreach b, $(boards), \
1083                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1084                 echo '')
1085
1086         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1087         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1088         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1089         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1090         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1091         @echo  ''
1092         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1093         @echo  'For further info see the ./README file'
1094
1095 # Generate doxygen docs
1096 # ---------------------------------------------------------------------------
1097 .PHONY += docs htmldocs
1098
1099 docs : htmldocs
1100
1101 htmldocs:
1102         @echo  'Running doxygen with local Doxyfile'
1103         $(Q)doxygen Doxyfile
1104
1105 # Generate tags for editors
1106 # ---------------------------------------------------------------------------
1107
1108 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1109 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1110 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1111
1112 ifeq ($(src),$(obj))
1113 __srctree =
1114 else
1115 __srctree = $(srctree)/
1116 endif
1117
1118 ifeq ($(ALLSOURCE_ARCHS),)
1119 ifeq ($(ARCH),um)
1120 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1121 else
1122 ALLINCLUDE_ARCHS := $(ARCH)
1123 endif
1124 else
1125 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1126 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1127 endif
1128
1129 ALLSOURCE_ARCHS := $(ARCH)
1130
1131 define find-sources
1132         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1133                \( -name include -o -name arch \) -prune -o \
1134                -name $1 -print; \
1135           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1136                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1137                     -name $1 -print; \
1138           done ; \
1139           find $(__srctree)include $(RCS_FIND_IGNORE) \
1140                \( -name config -o -name 'asm-*' \) -prune \
1141                -o -name $1 -print; \
1142           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1143                test -e $(__srctree)include/asm-$${arch} && \
1144                  find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1145                    -name $1 -print; \
1146               test -e $(__srctree)arch/$${arch}/include/asm && \
1147                 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
1148                     -name $1 -print; \
1149           done ; \
1150           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1151                -name $1 -print )
1152 endef
1153
1154 define all-sources
1155         $(call find-sources,'*.[chS]')
1156 endef
1157 define all-kconfigs
1158         $(call find-sources,'Kconfig*')
1159 endef
1160 define all-defconfigs
1161         $(call find-sources,'defconfig')
1162 endef
1163
1164 define xtags
1165         if $1 --version 2>&1 | grep -iq exuberant; then \
1166             $(all-sources) | xargs $1 -a \
1167                 -I __initdata,__exitdata,__acquires,__releases \
1168                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1169                 --extra=+f --c-kinds=+px \
1170                 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1171             $(all-kconfigs) | xargs $1 -a \
1172                 --langdef=kconfig \
1173                 --language-force=kconfig \
1174                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1175             $(all-defconfigs) | xargs -r $1 -a \
1176                 --langdef=dotconfig \
1177                 --language-force=dotconfig \
1178                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1179         elif $1 --version 2>&1 | grep -iq emacs; then \
1180             $(all-sources) | xargs $1 -a; \
1181             $(all-kconfigs) | xargs $1 -a \
1182                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1183             $(all-defconfigs) | xargs -r $1 -a \
1184                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1185         else \
1186             $(all-sources) | xargs $1 -a; \
1187         fi
1188 endef
1189
1190 quiet_cmd_cscope-file = FILELST cscope.files
1191       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1192
1193 quiet_cmd_cscope = MAKE    cscope.out
1194       cmd_cscope = cscope -b
1195
1196 cscope: FORCE
1197         $(call cmd,cscope-file)
1198         $(call cmd,cscope)
1199
1200 quiet_cmd_TAGS = MAKE   $@
1201 define cmd_TAGS
1202         rm -f $@; \
1203         $(call xtags,etags)
1204 endef
1205
1206 TAGS: FORCE
1207         $(call cmd,TAGS)
1208
1209 quiet_cmd_tags = MAKE   $@
1210 define cmd_tags
1211         rm -f $@; \
1212         $(call xtags,ctags)
1213 endef
1214
1215 tags: FORCE
1216         $(call cmd,tags)
1217
1218
1219 endif #ifeq ($(config-targets),1)
1220 endif #ifeq ($(mixed-targets),1)
1221
1222 # Single targets
1223 # ---------------------------------------------------------------------------
1224 # Single targets are compatible with:
1225 # - build whith mixed source and output
1226 # - build with separate output dir 'make O=...'
1227 # - external modules
1228 #
1229 #  target-dir => where to store outputfile
1230 #  build-dir  => directory in kernel source tree to use
1231
1232 build-dir  = $(patsubst %/,%,$(dir $@))
1233 target-dir = $(dir $@)
1234
1235 %.s: %.c prepare scripts FORCE
1236         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1237 %.i: %.c prepare scripts FORCE
1238         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1239 %.o: %.c prepare scripts FORCE
1240         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1241 %.lst: %.c prepare scripts FORCE
1242         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1243 %.s: %.S prepare scripts FORCE
1244         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1245 %.o: %.S prepare scripts FORCE
1246         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1247 %.symtypes: %.c prepare scripts FORCE
1248         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1249
1250 # Modules
1251 / %/: prepare scripts FORCE
1252         $(Q)$(MAKE) $(build)=$(build-dir)
1253 %.ko: prepare scripts FORCE
1254         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1255         $(build)=$(build-dir) $(@:.ko=.o)
1256         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1257
1258 # FIXME Should go into a make.lib or something
1259 # ===========================================================================
1260
1261 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1262       cmd_rmdirs = rm -rf $(rm-dirs)
1263
1264 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1265       cmd_rmfiles = rm -f $(rm-files)
1266
1267
1268 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1269           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1270           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1271
1272 quiet_cmd_as_o_S = AS      $@
1273 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1274
1275 # read all saved command lines
1276
1277 targets := $(wildcard $(sort $(targets)))
1278 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1279
1280 ifneq ($(cmd_files),)
1281   $(cmd_files): ;       # Do not try to update included dependency files
1282   include $(cmd_files)
1283 endif
1284
1285 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1286 # Usage:
1287 # $(Q)$(MAKE) $(clean)=dir
1288 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1289
1290 endif   # skip-makefile
1291
1292 PHONY += FORCE
1293 FORCE:
1294
1295 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1296 Makefile: ;
1297
1298 # Declare the contents of the .PHONY variable as phony.  We keep that
1299 # information in a variable se we can use it in if_changed and friends.
1300 .PHONY: $(PHONY)
1301