Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 28
   4 EXTRAVERSION =
   5 NAME = Erotic Pickled Herring
   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 avoids hard-to-debug behaviour);
  16 # o  print "Entering directory ...";
  17 MAKEFLAGS += -rR --no-print-directory
  18
  19 # Add custom flags here to avoid conflict with updates
  20 EXTRAVERSION := $(EXTRAVERSION)-omap1
  21
  22 # We are using a recursive build, so we need to do a little thinking
  23 # to get the ordering right.
  24 #
  25 # Most importantly: sub-Makefiles should only ever modify files in
  26 # their own directory. If in some directory we have a dependency on
  27 # a file in another dir (which doesn't happen often, but it's often
  28 # unavoidable when linking the built-in.o targets which finally
  29 # turn into vmlinux), we will call a sub make in that other dir, and
  30 # after that we are sure that everything which is in that other dir
  31 # is now up to date.
  32 #
  33 # The only cases where we need to modify files which have global
  34 # effects are thus separated out and done before the recursive
  35 # descending is started. They are now explicitly listed as the
  36 # prepare rule.
  37
  38 # To put more focus on warnings, be less verbose as default
  39 # Use 'make V=1' to see the full commands
  40
  41 ifdef V
  42   ifeq ("$(origin V)", "command line")
  43     KBUILD_VERBOSE = $(V)
  44   endif
  45 endif
  46 ifndef KBUILD_VERBOSE
  47   KBUILD_VERBOSE = 0
  48 endif
  49
  50 # Call a source code checker (by default, "sparse") as part of the
  51 # C compilation.
  52 #
  53 # Use 'make C=1' to enable checking of only re-compiled files.
  54 # Use 'make C=2' to enable checking of *all* source files, regardless
  55 # of whether they are re-compiled or not.
  56 #
  57 # See the file "Documentation/sparse.txt" for more details, including
  58 # where to get the "sparse" utility.
  59
  60 ifdef C
  61   ifeq ("$(origin C)", "command line")
  62     KBUILD_CHECKSRC = $(C)
  63   endif
  64 endif
  65 ifndef KBUILD_CHECKSRC
  66   KBUILD_CHECKSRC = 0
  67 endif
  68
  69 # Use make M=dir to specify directory of external module to build
  70 # Old syntax make ... SUBDIRS=$PWD is still supported
  71 # Setting the environment variable KBUILD_EXTMOD take precedence
  72 ifdef SUBDIRS
  73   KBUILD_EXTMOD ?= $(SUBDIRS)
  74 endif
  75 ifdef M
  76   ifeq ("$(origin M)", "command line")
  77     KBUILD_EXTMOD := $(M)
  78   endif
  79 endif
  80
  81
  82 # kbuild supports saving output files in a separate directory.
  83 # To locate output files in a separate directory two syntaxes are supported.
  84 # In both cases the working directory must be the root of the kernel src.
  85 # 1) O=
  86 # Use "make O=dir/to/store/output/files/"
  87 #
  88 # 2) Set KBUILD_OUTPUT
  89 # Set the environment variable KBUILD_OUTPUT to point to the directory
  90 # where the output files shall be placed.
  91 # export KBUILD_OUTPUT=dir/to/store/output/files/
  92 # make
  93 #
  94 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  95 # variable.
  96
  97
  98 # KBUILD_SRC is set on invocation of make in OBJ directory
  99 # KBUILD_SRC is not intended to be used by the regular user (for now)
 100 ifeq ($(KBUILD_SRC),)
 101
 102 # OK, Make called in directory where kernel src resides
 103 # Do we want to locate output files in a separate directory?
 104 ifdef O
 105   ifeq ("$(origin O)", "command line")
 106     KBUILD_OUTPUT := $(O)
 107   endif
 108 endif
 109
 110 # That's our default target when none is given on the command line
 111 PHONY := _all
 112 _all:
 113
 114 # Cancel implicit rules on top Makefile
 115 $(CURDIR)/Makefile Makefile: ;
 116
 117 ifneq ($(KBUILD_OUTPUT),)
 118 # Invoke a second make in the output directory, passing relevant variables
 119 # check that the output directory actually exists
 120 saved-output := $(KBUILD_OUTPUT)
 121 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 122 $(if $(KBUILD_OUTPUT),, \
 123      $(error output directory "$(saved-output)" does not exist))
 124
 125 PHONY += $(MAKECMDGOALS) sub-make
 126
 127 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
 128         $(Q)@:
 129
 130 sub-make: FORCE
 131         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 132         KBUILD_SRC=$(CURDIR) \
 133         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
 134         $(filter-out _all sub-make,$(MAKECMDGOALS))
 135
 136 # Leave processing to above invocation of make
 137 skip-makefile := 1
 138 endif # ifneq ($(KBUILD_OUTPUT),)
 139 endif # ifeq ($(KBUILD_SRC),)
 140
 141 # We process the rest of the Makefile if this is the final invocation of make
 142 ifeq ($(skip-makefile),)
 143
 144 # If building an external module we do not care about the all: rule
 145 # but instead _all depend on modules
 146 PHONY += all
 147 ifeq ($(KBUILD_EXTMOD),)
 148 _all: all
 149 else
 150 _all: modules
 151 endif
 152
 153 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 154 TOPDIR          := $(srctree)
 155 # FIXME - TOPDIR is obsolete, use srctree/objtree
 156 objtree         := $(CURDIR)
 157 src             := $(srctree)
 158 obj             := $(objtree)
 159
 160 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 161
 162 export srctree objtree VPATH TOPDIR
 163
 164
 165 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 166 # first, and if a usermode build is happening, the "ARCH=um" on the command
 167 # line overrides the setting of ARCH below.  If a native build is happening,
 168 # then ARCH is assigned, getting whatever value it gets normally, and
 169 # SUBARCH is subsequently ignored.
 170
 171 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 172                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 173                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 174                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 175                                   -e s/sh.*/sh/ )
 176
 177 SUBARCH := arm
 178
 179 # Cross compiling and selecting different set of gcc/bin-utils
 180 # ---------------------------------------------------------------------------
 181 #
 182 # When performing cross compilation for other architectures ARCH shall be set
 183 # to the target architecture. (See arch/* for the possibilities).
 184 # ARCH can be set during invocation of make:
 185 # make ARCH=ia64
 186 # Another way is to have ARCH set in the environment.
 187 # The default ARCH is the host where make is executed.
 188
 189 # CROSS_COMPILE specify the prefix used for all executables used
 190 # during compilation. Only gcc and related bin-utils executables
 191 # are prefixed with $(CROSS_COMPILE).
 192 # CROSS_COMPILE can be set on the command line
 193 # make CROSS_COMPILE=ia64-linux-
 194 # Alternatively CROSS_COMPILE can be set in the environment.
 195 # Default value for CROSS_COMPILE is not to prefix executables
 196 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 197 export KBUILD_BUILDHOST := $(SUBARCH)
 198 ARCH            ?= $(SUBARCH)
 199 CROSS_COMPILE   ?= arm-linux-
 200
 201 # Architecture as present in compile.h
 202 UTS_MACHINE     := $(ARCH)
 203 SRCARCH         := $(ARCH)
 204
 205 # Additional ARCH settings for x86
 206 ifeq ($(ARCH),i386)
 207         SRCARCH := x86
 208 endif
 209 ifeq ($(ARCH),x86_64)
 210         SRCARCH := x86
 211 endif
 212
 213 # Where to locate arch specific headers
 214 ifeq ($(ARCH),sparc64)
 215        hdr-arch  := sparc
 216 else
 217        hdr-arch  := $(SRCARCH)
 218 endif
 219
 220 KCONFIG_CONFIG  ?= .config
 221
 222 # SHELL used by kbuild
 223 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 224           else if [ -x /bin/bash ]; then echo /bin/bash; \
 225           else echo sh; fi ; fi)
 226
 227 HOSTCC       = gcc
 228 HOSTCXX      = g++
 229 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 230 HOSTCXXFLAGS = -O2
 231
 232 # Decide whether to build built-in, modular, or both.
 233 # Normally, just do built-in.
 234
 235 KBUILD_MODULES :=
 236 KBUILD_BUILTIN := 1
 237
 238 #       If we have only "make modules", don't compile built-in objects.
 239 #       When we're building modules with modversions, we need to consider
 240 #       the built-in objects during the descend as well, in order to
 241 #       make sure the checksums are up to date before we record them.
 242
 243 ifeq ($(MAKECMDGOALS),modules)
 244   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 245 endif
 246
 247 #       If we have "make <whatever> modules", compile modules
 248 #       in addition to whatever we do anyway.
 249 #       Just "make" or "make all" shall build modules as well
 250
 251 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 252   KBUILD_MODULES := 1
 253 endif
 254
 255 ifeq ($(MAKECMDGOALS),)
 256   KBUILD_MODULES := 1
 257 endif
 258
 259 export KBUILD_MODULES KBUILD_BUILTIN
 260 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 261
 262 # Beautify output
 263 # ---------------------------------------------------------------------------
 264 #
 265 # Normally, we echo the whole command before executing it. By making
 266 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 267 # $(quiet) to choose other forms of output instead, e.g.
 268 #
 269 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 270 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 271 #
 272 # If $(quiet) is empty, the whole command will be printed.
 273 # If it is set to "quiet_", only the short version will be printed.
 274 # If it is set to "silent_", nothing will be printed at all, since
 275 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 276 #
 277 # A simple variant is to prefix commands with $(Q) - that's useful
 278 # for commands that shall be hidden in non-verbose mode.
 279 #
 280 #       $(Q)ln $@ :<
 281 #
 282 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 283 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 284
 285 ifeq ($(KBUILD_VERBOSE),1)
 286   quiet =
 287   Q =
 288 else
 289   quiet=quiet_
 290   Q = @
 291 endif
 292
 293 # If the user is running make -s (silent mode), suppress echoing of
 294 # commands
 295
 296 ifneq ($(findstring s,$(MAKEFLAGS)),)
 297   quiet=silent_
 298 endif
 299
 300 export quiet Q KBUILD_VERBOSE
 301
 302
 303 # Look for make include files relative to root of kernel src
 304 MAKEFLAGS += --include-dir=$(srctree)
 305
 306 # We need some generic definitions (do not try to remake the file).
 307 $(srctree)/scripts/Kbuild.include: ;
 308 include $(srctree)/scripts/Kbuild.include
 309
 310 # Make variables (CC, etc...)
 311
 312 AS              = $(CROSS_COMPILE)as
 313 LD              = $(CROSS_COMPILE)ld
 314 CC              = $(CROSS_COMPILE)gcc
 315 CPP             = $(CC) -E
 316 AR              = $(CROSS_COMPILE)ar
 317 NM              = $(CROSS_COMPILE)nm
 318 STRIP           = $(CROSS_COMPILE)strip
 319 OBJCOPY         = $(CROSS_COMPILE)objcopy
 320 OBJDUMP         = $(CROSS_COMPILE)objdump
 321 AWK             = awk
 322 GENKSYMS        = scripts/genksyms/genksyms
 323 DEPMOD          = /sbin/depmod
 324 KALLSYMS        = scripts/kallsyms
 325 PERL            = perl
 326 CHECK           = sparse
 327
 328 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 329 MODFLAGS        = -DMODULE
 330 CFLAGS_MODULE   = $(MODFLAGS)
 331 AFLAGS_MODULE   = $(MODFLAGS)
 332 LDFLAGS_MODULE  =
 333 CFLAGS_KERNEL   =
 334 AFLAGS_KERNEL   =
 335
 336
 337 # Use LINUXINCLUDE when you must reference the include/ directory.
 338 # Needed to be compatible with the O= option
 339 LINUXINCLUDE    := -Iinclude \
 340                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 341                    -I$(srctree)/arch/$(hdr-arch)/include               \
 342                    -include include/linux/autoconf.h
 343
 344 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
 345
 346 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 347                    -fno-strict-aliasing -fno-common \
 348                    -Werror-implicit-function-declaration
 349 KBUILD_AFLAGS   := -D__ASSEMBLY__
 350
 351 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 352 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 353 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 354
 355 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 356 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 357 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 358 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 359
 360 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 361 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 362 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 363
 364 # When compiling out-of-tree modules, put MODVERDIR in the module
 365 # tree rather than in the kernel tree. The kernel tree might
 366 # even be read-only.
 367 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 368
 369 # Files to ignore in find ... statements
 370
 371 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
 372 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 373
 374 # ===========================================================================
 375 # Rules shared between *config targets and build targets
 376
 377 # Basic helpers built in scripts/
 378 PHONY += scripts_basic
 379 scripts_basic:
 380         $(Q)$(MAKE) $(build)=scripts/basic
 381
 382 # To avoid any implicit rule to kick in, define an empty command.
 383 scripts/basic/%: scripts_basic ;
 384
 385 PHONY += outputmakefile
 386 # outputmakefile generates a Makefile in the output directory, if using a
 387 # separate output directory. This allows convenient use of make in the
 388 # output directory.
 389 outputmakefile:
 390 ifneq ($(KBUILD_SRC),)
 391         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 392             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 393 endif
 394
 395 # To make sure we do not include .config for any of the *config targets
 396 # catch them early, and hand them over to scripts/kconfig/Makefile
 397 # It is allowed to specify more targets when calling make, including
 398 # mixing *config targets and build targets.
 399 # For example 'make oldconfig all'.
 400 # Detect when mixed targets is specified, and make a second invocation
 401 # of make so .config is not included in this case either (for *config).
 402
 403 no-dot-config-targets := clean mrproper distclean \
 404                          cscope TAGS tags help %docs check% \
 405                          include/linux/version.h headers_% \
 406                          kernelrelease kernelversion
 407
 408 config-targets := 0
 409 mixed-targets  := 0
 410 dot-config     := 1
 411
 412 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 413         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 414                 dot-config := 0
 415         endif
 416 endif
 417
 418 ifeq ($(KBUILD_EXTMOD),)
 419         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 420                 config-targets := 1
 421                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 422                         mixed-targets := 1
 423                 endif
 424         endif
 425 endif
 426
 427 ifeq ($(mixed-targets),1)
 428 # ===========================================================================
 429 # We're called with mixed targets (*config and build targets).
 430 # Handle them one by one.
 431
 432 %:: FORCE
 433         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 434
 435 else
 436 ifeq ($(config-targets),1)
 437 # ===========================================================================
 438 # *config targets only - make sure prerequisites are updated, and descend
 439 # in scripts/kconfig to make the *config target
 440
 441 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 442 # KBUILD_DEFCONFIG may point out an alternative default configuration
 443 # used for 'make defconfig'
 444 include $(srctree)/arch/$(SRCARCH)/Makefile
 445 export KBUILD_DEFCONFIG KBUILD_KCONFIG
 446
 447 config %config: scripts_basic outputmakefile FORCE
 448         $(Q)mkdir -p include/linux include/config
 449         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 450
 451 else
 452 # ===========================================================================
 453 # Build targets only - this includes vmlinux, arch specific targets, clean
 454 # targets and others. In general all targets except *config targets.
 455
 456 ifeq ($(KBUILD_EXTMOD),)
 457 # Additional helpers built in scripts/
 458 # Carefully list dependencies so we do not try to build scripts twice
 459 # in parallel
 460 PHONY += scripts
 461 scripts: scripts_basic include/config/auto.conf
 462         $(Q)$(MAKE) $(build)=$(@)
 463
 464 # Objects we will link into vmlinux / subdirs we need to visit
 465 init-y          := init/
 466 drivers-y       := drivers/ sound/ firmware/
 467 net-y           := net/
 468 libs-y          := lib/
 469 core-y          := usr/
 470 endif # KBUILD_EXTMOD
 471
 472 ifeq ($(dot-config),1)
 473 # Read in config
 474 -include include/config/auto.conf
 475
 476 ifeq ($(KBUILD_EXTMOD),)
 477 # Read in dependencies to all Kconfig* files, make sure to run
 478 # oldconfig if changes are detected.
 479 -include include/config/auto.conf.cmd
 480
 481 # To avoid any implicit rule to kick in, define an empty command
 482 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 483
 484 # If .config is newer than include/config/auto.conf, someone tinkered
 485 # with it and forgot to run make oldconfig.
 486 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 487 # we execute the config step to be sure to catch updated Kconfig files
 488 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 489         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 490 else
 491 # external modules needs include/linux/autoconf.h and include/config/auto.conf
 492 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 493 PHONY += include/config/auto.conf
 494
 495 include/config/auto.conf:
 496         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 497         echo;                                                           \
 498         echo "  ERROR: Kernel configuration is invalid.";               \
 499         echo "         include/linux/autoconf.h or $@ are missing.";    \
 500         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 501         echo;                                                           \
 502         /bin/false)
 503
 504 endif # KBUILD_EXTMOD
 505
 506 else
 507 # Dummy target needed, because used as prerequisite
 508 include/config/auto.conf: ;
 509 endif # $(dot-config)
 510
 511 # The all: target is the default when no target is given on the
 512 # command line.
 513 # This allow a user to issue only 'make' to build a kernel including modules
 514 # Defaults vmlinux but it is usually overridden in the arch makefile
 515 all: vmlinux
 516
 517 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 518 KBUILD_CFLAGS   += -Os
 519 else
 520 KBUILD_CFLAGS   += -O2
 521 endif
 522
 523 include $(srctree)/arch/$(SRCARCH)/Makefile
 524
 525 ifneq (CONFIG_FRAME_WARN,0)
 526 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 527 endif
 528
 529 # Force gcc to behave correct even for buggy distributions
 530 # Arch Makefiles may override this setting
 531 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 532
 533 ifdef CONFIG_FRAME_POINTER
 534 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 535 else
 536 KBUILD_CFLAGS   += -fomit-frame-pointer
 537 endif
 538
 539 ifdef CONFIG_DEBUG_INFO
 540 KBUILD_CFLAGS   += -g
 541 KBUILD_AFLAGS   += -gdwarf-2
 542 endif
 543
 544 ifdef CONFIG_FUNCTION_TRACER
 545 KBUILD_CFLAGS   += -pg
 546 endif
 547
 548 # We trigger additional mismatches with less inlining
 549 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 550 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 551 endif
 552
 553 # arch Makefile may override CC so keep this after arch Makefile is included
 554 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 555 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 556
 557 # warn about C99 declaration after statement
 558 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 559
 560 # disable pointer signed / unsigned warnings in gcc 4.0
 561 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 562
 563 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
 564 # But warn user when we do so
 565 warn-assign = \
 566 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
 567
 568 ifneq ($(KCPPFLAGS),)
 569         $(call warn-assign,CPPFLAGS)
 570         KBUILD_CPPFLAGS += $(KCPPFLAGS)
 571 endif
 572 ifneq ($(KAFLAGS),)
 573         $(call warn-assign,AFLAGS)
 574         KBUILD_AFLAGS += $(KAFLAGS)
 575 endif
 576 ifneq ($(KCFLAGS),)
 577         $(call warn-assign,CFLAGS)
 578         KBUILD_CFLAGS += $(KCFLAGS)
 579 endif
 580
 581 # Use --build-id when available.
 582 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 583                               $(call ld-option, -Wl$(comma)--build-id,))
 584 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 585 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 586
 587 # Default kernel image to build when no specific target is given.
 588 # KBUILD_IMAGE may be overruled on the command line or
 589 # set in the environment
 590 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 591 # this default value
 592 export KBUILD_IMAGE ?= vmlinux
 593
 594 #
 595 # INSTALL_PATH specifies where to place the updated kernel and system map
 596 # images. Default is /boot, but you can set it to other values
 597 export  INSTALL_PATH ?= /boot
 598
 599 #
 600 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 601 # relocations required by build roots.  This is not defined in the
 602 # makefile but the argument can be passed to make if needed.
 603 #
 604
 605 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 606 export MODLIB
 607
 608 #
 609 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 610 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 611 #  the default option --strip-debug will be used.  Otherwise,
 612 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 613
 614 ifdef INSTALL_MOD_STRIP
 615 ifeq ($(INSTALL_MOD_STRIP),1)
 616 mod_strip_cmd = $(STRIP) --strip-debug
 617 else
 618 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 619 endif # INSTALL_MOD_STRIP=1
 620 else
 621 mod_strip_cmd = true
 622 endif # INSTALL_MOD_STRIP
 623 export mod_strip_cmd
 624
 625
 626 ifeq ($(KBUILD_EXTMOD),)
 627 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 628
 629 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 630                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 631                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 632
 633 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 634                      $(init-n) $(init-) \
 635                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 636                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 637
 638 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 639 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 640 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 641 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 642 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 643 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 644 libs-y          := $(libs-y1) $(libs-y2)
 645
 646 # Build vmlinux
 647 # ---------------------------------------------------------------------------
 648 # vmlinux is built from the objects selected by $(vmlinux-init) and
 649 # $(vmlinux-main). Most are built-in.o files from top-level directories
 650 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 651 # Ordering when linking is important, and $(vmlinux-init) must be first.
 652 #
 653 # vmlinux
 654 #   ^
 655 #   |
 656 #   +-< $(vmlinux-init)
 657 #   |   +--< init/version.o + more
 658 #   |
 659 #   +--< $(vmlinux-main)
 660 #   |    +--< driver/built-in.o mm/built-in.o + more
 661 #   |
 662 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 663 #
 664 # vmlinux version (uname -v) cannot be updated during normal
 665 # descending-into-subdirs phase since we do not yet know if we need to
 666 # update vmlinux.
 667 # Therefore this step is delayed until just before final link of vmlinux -
 668 # except in the kallsyms case where it is done just before adding the
 669 # symbols to the kernel.
 670 #
 671 # System.map is generated to document addresses of all kernel symbols
 672
 673 vmlinux-init := $(head-y) $(init-y)
 674 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 675 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 676 vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
 677 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 678
 679 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 680 # May be overridden by arch/$(ARCH)/Makefile
 681 quiet_cmd_vmlinux__ ?= LD      $@
 682       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 683       -T $(vmlinux-lds) $(vmlinux-init)                          \
 684       --start-group $(vmlinux-main) --end-group                  \
 685       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
 686
 687 # Generate new vmlinux version
 688 quiet_cmd_vmlinux_version = GEN     .version
 689       cmd_vmlinux_version = set -e;                     \
 690         if [ ! -r .version ]; then                      \
 691           rm -f .version;                               \
 692           echo 1 >.version;                             \
 693         else                                            \
 694           mv .version .old_version;                     \
 695           expr 0$$(cat .old_version) + 1 >.version;     \
 696         fi;                                             \
 697         $(MAKE) $(build)=init
 698
 699 # Generate System.map
 700 quiet_cmd_sysmap = SYSMAP
 701       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 702
 703 # Link of vmlinux
 704 # If CONFIG_KALLSYMS is set .version is already updated
 705 # Generate System.map and verify that the content is consistent
 706 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 707 # First command is ':' to allow us to use + in front of the rule
 708 define rule_vmlinux__
 709         :
 710         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 711
 712         $(call cmd,vmlinux__)
 713         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 714
 715         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 716           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 717         $(cmd_sysmap) $@ System.map;                                         \
 718         if [ $$? -ne 0 ]; then                                               \
 719                 rm -f $@;                                                    \
 720                 /bin/false;                                                  \
 721         fi;
 722         $(verify_kallsyms)
 723 endef
 724
 725
 726 ifdef CONFIG_KALLSYMS
 727 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 728 # It's a three stage process:
 729 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 730 #   empty
 731 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 732 #   the right size - vmlinux version (uname -v) is updated during this step
 733 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 734 #   but due to the added section, some addresses have shifted.
 735 #   From here, we generate a correct .tmp_kallsyms2.o
 736 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 737 # o Verify that the System.map from vmlinux matches the map from
 738 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 739 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 740 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 741 #   temporary bypass to allow the kernel to be built while the
 742 #   maintainers work out what went wrong with kallsyms.
 743
 744 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 745 last_kallsyms := 3
 746 else
 747 last_kallsyms := 2
 748 endif
 749
 750 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 751
 752 define verify_kallsyms
 753         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 754           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 755           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 756         $(Q)cmp -s System.map .tmp_System.map ||                             \
 757                 (echo Inconsistent kallsyms data;                            \
 758                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 759                  rm .tmp_kallsyms* ; /bin/false )
 760 endef
 761
 762 # Update vmlinux version before link
 763 # Use + in front of this rule to silent warning about make -j1
 764 # First command is ':' to allow us to use + in front of this rule
 765 cmd_ksym_ld = $(cmd_vmlinux__)
 766 define rule_ksym_ld
 767         :
 768         +$(call cmd,vmlinux_version)
 769         $(call cmd,vmlinux__)
 770         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 771 endef
 772
 773 # Generate .S file with all kernel symbols
 774 quiet_cmd_kallsyms = KSYM    $@
 775       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 776                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 777
 778 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 779         $(call if_changed_dep,as_o_S)
 780
 781 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 782         $(call cmd,kallsyms)
 783
 784 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 785 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 786         $(call if_changed_rule,ksym_ld)
 787
 788 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 789         $(call if_changed,vmlinux__)
 790
 791 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 792         $(call if_changed,vmlinux__)
 793
 794 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 795 $(KALLSYMS): scripts ;
 796
 797 # Generate some data for debugging strange kallsyms problems
 798 debug_kallsyms: .tmp_map$(last_kallsyms)
 799
 800 .tmp_map%: .tmp_vmlinux% FORCE
 801         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 802
 803 .tmp_map3: .tmp_map2
 804
 805 .tmp_map2: .tmp_map1
 806
 807 endif # ifdef CONFIG_KALLSYMS
 808
 809 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 810 # relevant sections renamed as per the linker script.
 811 quiet_cmd_vmlinux-modpost = LD      $@
 812       cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 813          $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
 814          $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 815 define rule_vmlinux-modpost
 816         :
 817         +$(call cmd,vmlinux-modpost)
 818         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 819         $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
 820 endef
 821
 822 # vmlinux image - including updated kernel symbols
 823 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
 824 ifdef CONFIG_HEADERS_CHECK
 825         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 826 endif
 827 ifdef CONFIG_SAMPLES
 828         $(Q)$(MAKE) $(build)=samples
 829 endif
 830 ifdef CONFIG_BUILD_DOCSRC
 831         $(Q)$(MAKE) $(build)=Documentation
 832 endif
 833         $(call vmlinux-modpost)
 834         $(call if_changed_rule,vmlinux__)
 835         $(Q)rm -f .old_version
 836
 837 # build vmlinux.o first to catch section mismatch errors early
 838 ifdef CONFIG_KALLSYMS
 839 .tmp_vmlinux1: vmlinux.o
 840 endif
 841
 842 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
 843 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
 844         $(call if_changed_rule,vmlinux-modpost)
 845
 846 # The actual objects are generated when descending,
 847 # make sure no implicit rule kicks in
 848 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 849
 850 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 851 # Preset locale variables to speed up the build process. Limit locale
 852 # tweaks to this spot to avoid wrong language settings when running
 853 # make menuconfig etc.
 854 # Error messages still appears in the original language
 855
 856 PHONY += $(vmlinux-dirs)
 857 $(vmlinux-dirs): prepare scripts
 858         $(Q)$(MAKE) $(build)=$@
 859
 860 # Build the kernel release string
 861 #
 862 # The KERNELRELEASE value built here is stored in the file
 863 # include/config/kernel.release, and is used when executing several
 864 # make targets, such as "make install" or "make modules_install."
 865 #
 866 # The eventual kernel release string consists of the following fields,
 867 # shown in a hierarchical format to show how smaller parts are concatenated
 868 # to form the larger and final value, with values coming from places like
 869 # the Makefile, kernel config options, make command line options and/or
 870 # SCM tag information.
 871 #
 872 #       $(KERNELVERSION)
 873 #         $(VERSION)                    eg, 2
 874 #         $(PATCHLEVEL)                 eg, 6
 875 #         $(SUBLEVEL)                   eg, 18
 876 #         $(EXTRAVERSION)               eg, -rc6
 877 #       $(localver-full)
 878 #         $(localver)
 879 #           localversion*               (files without backups, containing '~')
 880 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 881 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 882 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 883 #           $(LOCALVERSION)             (from make command line if provided)
 884 #
 885 #  Note how the final $(localver-auto) string is included *only* if the
 886 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 887 # moment, only git is supported but other SCMs can edit the script
 888 # scripts/setlocalversion and add the appropriate checks as needed.
 889
 890 pattern = ".*/localversion[^~]*"
 891 string  = $(shell cat /dev/null \
 892            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 893
 894 localver = $(subst $(space),, $(string) \
 895                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 896
 897 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 898 # and if the SCM is know a tag from the SCM is appended.
 899 # The appended tag is determined by the SCM used.
 900 #
 901 # Currently, only git is supported.
 902 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 903 # checks as needed.
 904 ifdef CONFIG_LOCALVERSION_AUTO
 905         _localver-auto = $(shell $(CONFIG_SHELL) \
 906                           $(srctree)/scripts/setlocalversion $(srctree))
 907         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 908 endif
 909
 910 localver-full = $(localver)$(localver-auto)
 911
 912 # Store (new) KERNELRELASE string in include/config/kernel.release
 913 kernelrelease = $(KERNELVERSION)$(localver-full)
 914 include/config/kernel.release: include/config/auto.conf FORCE
 915         $(Q)rm -f $@
 916         $(Q)echo $(kernelrelease) > $@
 917
 918
 919 # Things we need to do before we recursively start building the kernel
 920 # or the modules are listed in "prepare".
 921 # A multi level approach is used. prepareN is processed before prepareN-1.
 922 # archprepare is used in arch Makefiles and when processed asm symlink,
 923 # version.h and scripts_basic is processed / created.
 924
 925 # Listed in dependency order
 926 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 927
 928 # prepare3 is used to check if we are building in a separate output directory,
 929 # and if so do:
 930 # 1) Check that make has not been executed in the kernel src $(srctree)
 931 # 2) Create the include2 directory, used for the second asm symlink
 932 prepare3: include/config/kernel.release
 933 ifneq ($(KBUILD_SRC),)
 934         @echo '  Using $(srctree) as source for kernel'
 935         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 936                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 937                 echo "  in the '$(srctree)' directory.";\
 938                 /bin/false; \
 939         fi;
 940         $(Q)if [ ! -d include2 ]; then                                  \
 941             mkdir -p include2;                                          \
 942             ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 943         fi
 944 endif
 945
 946 # prepare2 creates a makefile if using a separate output directory
 947 prepare2: prepare3 outputmakefile
 948
 949 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 950                    include/asm include/config/auto.conf
 951         $(cmd_crmodverdir)
 952
 953 archprepare: prepare1 scripts_basic
 954
 955 prepare0: archprepare FORCE
 956         $(Q)$(MAKE) $(build)=.
 957         $(Q)$(MAKE) $(build)=. missing-syscalls
 958
 959 # All the preparing..
 960 prepare: prepare0
 961
 962 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 963 # done in arch/$(ARCH)/kernel/Makefile
 964
 965 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 966
 967 # The asm symlink changes when $(ARCH) changes.
 968 # Detect this and ask user to run make mrproper
 969 # If asm is a stale symlink (point to dir that does not exist) remove it
 970 define check-symlink
 971         set -e;                                                            \
 972         if [ -L include/asm ]; then                                        \
 973                 asmlink=`readlink include/asm | cut -d '-' -f 2`;          \
 974                 if [ "$$asmlink" != "$(SRCARCH)" ]; then                   \
 975                         echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
 976                         echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
 977                         exit 1;                                            \
 978                 fi;                                                        \
 979                 test -e $$asmlink || rm include/asm;                       \
 980         elif [ -d include/asm ]; then                                      \
 981                 echo "ERROR: $@ is a directory but a symlink was expected";\
 982                 exit 1;                                                    \
 983         fi
 984 endef
 985
 986 # We create the target directory of the symlink if it does
 987 # not exist so the test in chack-symlink works and we have a
 988 # directory for generated filesas used by some architectures.
 989 define create-symlink
 990         if [ ! -L include/asm ]; then                                      \
 991                         echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';     \
 992                         if [ ! -d include/asm-$(SRCARCH) ]; then           \
 993                                 mkdir -p include/asm-$(SRCARCH);           \
 994                         fi;                                                \
 995                         ln -fsn asm-$(SRCARCH) $@;                         \
 996         fi
 997 endef
 998
 999 include/asm: FORCE
1000         $(Q)$(check-symlink)
1001         $(Q)$(create-symlink)
1002
1003 # Generate some files
1004 # ---------------------------------------------------------------------------
1005
1006 # KERNELRELEASE can change from a few different places, meaning version.h
1007 # needs to be updated, so this check is forced on all builds
1008
1009 uts_len := 64
1010 define filechk_utsrelease.h
1011         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1012           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1013           exit 1;                                                         \
1014         fi;                                                               \
1015         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1016 endef
1017
1018 define filechk_version.h
1019         (echo \#define LINUX_VERSION_CODE $(shell                             \
1020         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
1021         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1022 endef
1023
1024 include/linux/version.h: $(srctree)/Makefile FORCE
1025         $(call filechk,version.h)
1026
1027 include/linux/utsrelease.h: include/config/kernel.release FORCE
1028         $(call filechk,utsrelease.h)
1029
1030 # ---------------------------------------------------------------------------
1031
1032 PHONY += depend dep
1033 depend dep:
1034         @echo '*** Warning: make $@ is unnecessary now.'
1035
1036 # ---------------------------------------------------------------------------
1037 # Firmware install
1038 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1039 export INSTALL_FW_PATH
1040
1041 PHONY += firmware_install
1042 firmware_install: FORCE
1043         @mkdir -p $(objtree)/firmware
1044         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1045
1046 # ---------------------------------------------------------------------------
1047 # Kernel headers
1048
1049 #Default location for installed headers
1050 export INSTALL_HDR_PATH = $(objtree)/usr
1051
1052 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1053 # Find out where the Kbuild file is located to support
1054 # arch/$(ARCH)/include/asm
1055 hdr-dir = $(strip                                                         \
1056           $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1057                arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1058
1059 # If we do an all arch process set dst to asm-$(hdr-arch)
1060 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1061
1062 PHONY += __headers
1063 __headers: include/linux/version.h scripts_basic FORCE
1064         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1065
1066 PHONY += headers_install_all
1067 headers_install_all:
1068         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1069
1070 PHONY += headers_install
1071 headers_install: __headers
1072         $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1073         $(error Headers not exportable for the $(SRCARCH) architecture))
1074         $(Q)$(MAKE) $(hdr-inst)=include
1075         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1076
1077 PHONY += headers_check_all
1078 headers_check_all: headers_install_all
1079         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1080
1081 PHONY += headers_check
1082 headers_check: headers_install
1083         $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1084         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1085
1086 # ---------------------------------------------------------------------------
1087 # Modules
1088
1089 ifdef CONFIG_MODULES
1090
1091 # By default, build modules as well
1092
1093 all: modules
1094
1095 #       Build modules
1096 #
1097 #       A module can be listed more than once in obj-m resulting in
1098 #       duplicate lines in modules.order files.  Those are removed
1099 #       using awk while concatenating to the final file.
1100
1101 PHONY += modules
1102 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1103         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1104         @echo '  Building modules, stage 2.';
1105         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1106         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1107
1108
1109 # Target to prepare building external modules
1110 PHONY += modules_prepare
1111 modules_prepare: prepare scripts
1112
1113 # Target to install modules
1114 PHONY += modules_install
1115 modules_install: _modinst_ _modinst_post
1116
1117 PHONY += _modinst_
1118 _modinst_:
1119         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1120                 echo "Warning: you may need to install module-init-tools"; \
1121                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1122                 sleep 1; \
1123         fi
1124         @rm -rf $(MODLIB)/kernel
1125         @rm -f $(MODLIB)/source
1126         @mkdir -p $(MODLIB)/kernel
1127         @ln -s $(srctree) $(MODLIB)/source
1128         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1129                 rm -f $(MODLIB)/build ; \
1130                 ln -s $(objtree) $(MODLIB)/build ; \
1131         fi
1132         @cp -f $(objtree)/modules.order $(MODLIB)/
1133         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1134
1135 # This depmod is only for convenience to give the initial
1136 # boot a modules.dep even before / is mounted read-write.  However the
1137 # boot script depmod is the master version.
1138 PHONY += _modinst_post
1139 _modinst_post: _modinst_
1140         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1141         $(call cmd,depmod)
1142
1143 else # CONFIG_MODULES
1144
1145 # Modules not configured
1146 # ---------------------------------------------------------------------------
1147
1148 modules modules_install: FORCE
1149         @echo
1150         @echo "The present kernel configuration has modules disabled."
1151         @echo "Type 'make config' and enable loadable module support."
1152         @echo "Then build a kernel with module support enabled."
1153         @echo
1154         @exit 1
1155
1156 endif # CONFIG_MODULES
1157
1158 ###
1159 # Cleaning is done on three levels.
1160 # make clean     Delete most generated files
1161 #                Leave enough to build external modules
1162 # make mrproper  Delete the current configuration, and all generated files
1163 # make distclean Remove editor backup files, patch leftover files and the like
1164
1165 # Directories & files removed with 'make clean'
1166 CLEAN_DIRS  += $(MODVERDIR)
1167 CLEAN_FILES +=  vmlinux System.map \
1168                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1169
1170 # Directories & files removed with 'make mrproper'
1171 MRPROPER_DIRS  += include/config include2 usr/include
1172 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1173                   include/linux/autoconf.h include/linux/version.h      \
1174                   include/linux/utsrelease.h                            \
1175                   include/linux/bounds.h include/asm*/asm-offsets.h     \
1176                   Module.symvers Module.markers tags TAGS cscope*
1177
1178 # clean - Delete most, but leave enough to build external modules
1179 #
1180 clean: rm-dirs  := $(CLEAN_DIRS)
1181 clean: rm-files := $(CLEAN_FILES)
1182 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1183
1184 PHONY += $(clean-dirs) clean archclean
1185 $(clean-dirs):
1186         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1187
1188 clean: archclean $(clean-dirs)
1189         $(call cmd,rmdirs)
1190         $(call cmd,rmfiles)
1191         @find . $(RCS_FIND_IGNORE) \
1192                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1193                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1194                 -o -name '*.symtypes' -o -name 'modules.order' \
1195                 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
1196                 -type f -print | xargs rm -f
1197
1198 # mrproper - Delete all generated files, including .config
1199 #
1200 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1201 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1202 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1203
1204 PHONY += $(mrproper-dirs) mrproper archmrproper
1205 $(mrproper-dirs):
1206         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1207
1208 mrproper: clean archmrproper $(mrproper-dirs)
1209         $(call cmd,rmdirs)
1210         $(call cmd,rmfiles)
1211
1212 # distclean
1213 #
1214 PHONY += distclean
1215
1216 distclean: mrproper
1217         @find $(srctree) $(RCS_FIND_IGNORE) \
1218                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1219                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1220                 -o -name '.*.rej' -o -size 0 \
1221                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1222                 -type f -print | xargs rm -f
1223
1224
1225 # Packaging of the kernel to various formats
1226 # ---------------------------------------------------------------------------
1227 # rpm target kept for backward compatibility
1228 package-dir     := $(srctree)/scripts/package
1229
1230 %pkg: include/config/kernel.release FORCE
1231         $(Q)$(MAKE) $(build)=$(package-dir) $@
1232 rpm: include/config/kernel.release FORCE
1233         $(Q)$(MAKE) $(build)=$(package-dir) $@
1234
1235
1236 # Brief documentation of the typical targets used
1237 # ---------------------------------------------------------------------------
1238
1239 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1240 boards := $(notdir $(boards))
1241 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1242 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1243
1244 help:
1245         @echo  'Cleaning targets:'
1246         @echo  '  clean           - Remove most generated files but keep the config and'
1247         @echo  '                    enough build support to build external modules'
1248         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1249         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1250         @echo  ''
1251         @echo  'Configuration targets:'
1252         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1253         @echo  ''
1254         @echo  'Other generic targets:'
1255         @echo  '  all             - Build all targets marked with [*]'
1256         @echo  '* vmlinux         - Build the bare kernel'
1257         @echo  '* modules         - Build all modules'
1258         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1259         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1260         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1261         @echo  '  dir/            - Build all files in dir and below'
1262         @echo  '  dir/file.[ois]  - Build specified target only'
1263         @echo  '  dir/file.ko     - Build module including final link'
1264         @echo  '  prepare         - Set up for building external modules'
1265         @echo  '  tags/TAGS       - Generate tags file for editors'
1266         @echo  '  cscope          - Generate cscope index'
1267         @echo  '  kernelrelease   - Output the release version string'
1268         @echo  '  kernelversion   - Output the version stored in Makefile'
1269         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1270          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1271          echo  ''
1272         @echo  'Static analysers'
1273         @echo  '  checkstack      - Generate a list of stack hogs'
1274         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1275         @echo  '  versioncheck    - Sanity check on version.h usage'
1276         @echo  '  includecheck    - Check for duplicate included header files'
1277         @echo  '  export_report   - List the usages of all exported symbols'
1278         @echo  '  headers_check   - Sanity check on exported headers'; \
1279          echo  ''
1280         @echo  'Kernel packaging:'
1281         @$(MAKE) $(build)=$(package-dir) help
1282         @echo  ''
1283         @echo  'Documentation targets:'
1284         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1285         @echo  ''
1286         @echo  'Architecture specific targets ($(SRCARCH)):'
1287         @$(if $(archhelp),$(archhelp),\
1288                 echo '  No architecture specific help defined for $(SRCARCH)')
1289         @echo  ''
1290         @$(if $(boards), \
1291                 $(foreach b, $(boards), \
1292                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1293                 echo '')
1294         @$(if $(board-dirs), \
1295                 $(foreach b, $(board-dirs), \
1296                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1297                 printf "  %-16s - Show all of the above\\n" help-boards; \
1298                 echo '')
1299
1300         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1301         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1302         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1303         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1304         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1305         @echo  ''
1306         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1307         @echo  'For further info see the ./README file'
1308
1309
1310 help-board-dirs := $(addprefix help-,$(board-dirs))
1311
1312 help-boards: $(help-board-dirs)
1313
1314 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1315
1316 $(help-board-dirs): help-%:
1317         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1318         @$(if $(boards-per-dir), \
1319                 $(foreach b, $(boards-per-dir), \
1320                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1321                 echo '')
1322
1323
1324 # Documentation targets
1325 # ---------------------------------------------------------------------------
1326 %docs: scripts_basic FORCE
1327         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1328
1329 else # KBUILD_EXTMOD
1330
1331 ###
1332 # External module support.
1333 # When building external modules the kernel used as basis is considered
1334 # read-only, and no consistency checks are made and the make
1335 # system is not used on the basis kernel. If updates are required
1336 # in the basis kernel ordinary make commands (without M=...) must
1337 # be used.
1338 #
1339 # The following are the only valid targets when building external
1340 # modules.
1341 # make M=dir clean     Delete all automatically generated files
1342 # make M=dir modules   Make all modules in specified dir
1343 # make M=dir           Same as 'make M=dir modules'
1344 # make M=dir modules_install
1345 #                      Install the modules built in the module directory
1346 #                      Assumes install directory is already created
1347
1348 # We are always building modules
1349 KBUILD_MODULES := 1
1350 PHONY += crmodverdir
1351 crmodverdir:
1352         $(cmd_crmodverdir)
1353
1354 PHONY += $(objtree)/Module.symvers
1355 $(objtree)/Module.symvers:
1356         @test -e $(objtree)/Module.symvers || ( \
1357         echo; \
1358         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1359         echo "           is missing; modules will have no dependencies and modversions."; \
1360         echo )
1361
1362 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1363 PHONY += $(module-dirs) modules
1364 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1365         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1366
1367 modules: $(module-dirs)
1368         @echo '  Building modules, stage 2.';
1369         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1370
1371 PHONY += modules_install
1372 modules_install: _emodinst_ _emodinst_post
1373
1374 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1375 PHONY += _emodinst_
1376 _emodinst_:
1377         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1378         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1379
1380 PHONY += _emodinst_post
1381 _emodinst_post: _emodinst_
1382         $(call cmd,depmod)
1383
1384 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1385
1386 PHONY += $(clean-dirs) clean
1387 $(clean-dirs):
1388         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1389
1390 clean:  rm-dirs := $(MODVERDIR)
1391 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1392 clean: $(clean-dirs)
1393         $(call cmd,rmdirs)
1394         $(call cmd,rmfiles)
1395         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1396                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1397                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1398                 -type f -print | xargs rm -f
1399
1400 help:
1401         @echo  '  Building external modules.'
1402         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1403         @echo  ''
1404         @echo  '  modules         - default target, build the module(s)'
1405         @echo  '  modules_install - install the module'
1406         @echo  '  clean           - remove generated files in module directory only'
1407         @echo  ''
1408
1409 # Dummies...
1410 PHONY += prepare scripts
1411 prepare: ;
1412 scripts: ;
1413 endif # KBUILD_EXTMOD
1414
1415 # Generate tags for editors
1416 # ---------------------------------------------------------------------------
1417
1418 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1419 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1420 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1421
1422 ifeq ($(src),$(obj))
1423 __srctree =
1424 else
1425 __srctree = $(srctree)/
1426 endif
1427
1428 ifeq ($(ALLSOURCE_ARCHS),)
1429 ifeq ($(ARCH),um)
1430 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1431 else
1432 ALLINCLUDE_ARCHS := $(SRCARCH)
1433 endif
1434 else
1435 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1436 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1437 endif
1438
1439 ALLSOURCE_ARCHS := $(SRCARCH)
1440
1441 define find-sources
1442         ( for arch in $(ALLSOURCE_ARCHS) ; do \
1443                find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1444                     -wholename $(__srctree)arch/$${arch}/include/asm -type d -prune \
1445                     -o -name $1 -print; \
1446           done ; \
1447           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1448                -name $1 -print; \
1449           find $(__srctree)include $(RCS_FIND_IGNORE) \
1450                \( -name config -o -name 'asm-*' \) -prune \
1451                -o -name $1 -print; \
1452           for arch in $(ALLINCLUDE_ARCHS) ; do \
1453                test -e $(__srctree)include/asm-$${arch} && \
1454                  find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1455                     -name $1 -print; \
1456                test -e $(__srctree)arch/$${arch}/include/asm && \
1457                  find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
1458                     -name $1 -print; \
1459           done ; \
1460           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1461                -name $1 -print; \
1462           find $(__srctree) $(RCS_FIND_IGNORE) \
1463                \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1464                -name $1 -print; \
1465           )
1466 endef
1467
1468 define all-sources
1469         $(call find-sources,'*.[chS]')
1470 endef
1471 define all-kconfigs
1472         $(call find-sources,'Kconfig*')
1473 endef
1474 define all-defconfigs
1475         $(call find-sources,'defconfig')
1476 endef
1477
1478 define xtags
1479         if $1 --version 2>&1 | grep -iq exuberant; then \
1480             $(all-sources) | xargs $1 -a \
1481                 -I __initdata,__exitdata,__acquires,__releases \
1482                 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1483                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1484                 --extra=+f --c-kinds=+px \
1485                 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1486             $(all-kconfigs) | xargs $1 -a \
1487                 --langdef=kconfig \
1488                 --language-force=kconfig \
1489                 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
1490             $(all-defconfigs) | xargs -r $1 -a \
1491                 --langdef=dotconfig \
1492                 --language-force=dotconfig \
1493                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1494         elif $1 --version 2>&1 | grep -iq emacs; then \
1495             $(all-sources) | xargs $1 -a; \
1496             $(all-kconfigs) | xargs $1 -a \
1497                 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
1498             $(all-defconfigs) | xargs -r $1 -a \
1499                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1500         else \
1501             $(all-sources) | xargs $1 -a; \
1502         fi
1503 endef
1504
1505 quiet_cmd_cscope-file = FILELST cscope.files
1506       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1507
1508 quiet_cmd_cscope = MAKE    cscope.out
1509       cmd_cscope = cscope -b -f cscope.out
1510
1511 cscope: FORCE
1512         $(call cmd,cscope-file)
1513         $(call cmd,cscope)
1514
1515 quiet_cmd_TAGS = MAKE   $@
1516 define cmd_TAGS
1517         rm -f $@; \
1518         $(call xtags,etags)
1519 endef
1520
1521 TAGS: FORCE
1522         $(call cmd,TAGS)
1523
1524 quiet_cmd_tags = MAKE   $@
1525 define cmd_tags
1526         rm -f $@; \
1527         $(call xtags,ctags)
1528 endef
1529
1530 tags: FORCE
1531         $(call cmd,tags)
1532
1533
1534 # Scripts to check various things for consistency
1535 # ---------------------------------------------------------------------------
1536
1537 includecheck:
1538         find * $(RCS_FIND_IGNORE) \
1539                 -name '*.[hcS]' -type f -print | sort \
1540                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1541
1542 versioncheck:
1543         find * $(RCS_FIND_IGNORE) \
1544                 -name '*.[hcS]' -type f -print | sort \
1545                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1546
1547 namespacecheck:
1548         $(PERL) $(srctree)/scripts/namespace.pl
1549
1550 export_report:
1551         $(PERL) $(srctree)/scripts/export_report.pl
1552
1553 endif #ifeq ($(config-targets),1)
1554 endif #ifeq ($(mixed-targets),1)
1555
1556 PHONY += checkstack kernelrelease kernelversion
1557
1558 # UML needs a little special treatment here.  It wants to use the host
1559 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1560 # else wants $(ARCH), including people doing cross-builds, which means
1561 # that $(SUBARCH) doesn't work here.
1562 ifeq ($(ARCH), um)
1563 CHECKSTACK_ARCH := $(SUBARCH)
1564 else
1565 CHECKSTACK_ARCH := $(ARCH)
1566 endif
1567 checkstack:
1568         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1569         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1570
1571 kernelrelease:
1572         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1573         $(error kernelrelease not valid - run 'make prepare' to update it))
1574 kernelversion:
1575         @echo $(KERNELVERSION)
1576
1577 # Single targets
1578 # ---------------------------------------------------------------------------
1579 # Single targets are compatible with:
1580 # - build with mixed source and output
1581 # - build with separate output dir 'make O=...'
1582 # - external modules
1583 #
1584 #  target-dir => where to store outputfile
1585 #  build-dir  => directory in kernel source tree to use
1586
1587 ifeq ($(KBUILD_EXTMOD),)
1588         build-dir  = $(patsubst %/,%,$(dir $@))
1589         target-dir = $(dir $@)
1590 else
1591         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1592         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1593         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1594 endif
1595
1596 %.s: %.c prepare scripts FORCE
1597         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1598 %.i: %.c prepare scripts FORCE
1599         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1600 %.o: %.c prepare scripts FORCE
1601         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1602 %.lst: %.c prepare scripts FORCE
1603         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1604 %.s: %.S prepare scripts FORCE
1605         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1606 %.o: %.S prepare scripts FORCE
1607         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1608 %.symtypes: %.c prepare scripts FORCE
1609         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1610
1611 # Modules
1612 / %/: prepare scripts FORCE
1613         $(cmd_crmodverdir)
1614         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1615         $(build)=$(build-dir)
1616 %.ko: prepare scripts FORCE
1617         $(cmd_crmodverdir)
1618         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1619         $(build)=$(build-dir) $(@:.ko=.o)
1620         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1621
1622 # FIXME Should go into a make.lib or something
1623 # ===========================================================================
1624
1625 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1626       cmd_rmdirs = rm -rf $(rm-dirs)
1627
1628 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1629       cmd_rmfiles = rm -f $(rm-files)
1630
1631 # Run depmod only if we have System.map and depmod is executable
1632 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1633       cmd_depmod = \
1634         if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1635                 $(DEPMOD) -ae -F System.map                                     \
1636                 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r)   \
1637                 $(KERNELRELEASE);                                               \
1638         fi
1639
1640 # Create temporary dir for module support files
1641 # clean it up only when building all modules
1642 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1643                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1644
1645 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1646           $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1647           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1648
1649 quiet_cmd_as_o_S = AS      $@
1650 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1651
1652 # read all saved command lines
1653
1654 targets := $(wildcard $(sort $(targets)))
1655 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1656
1657 ifneq ($(cmd_files),)
1658   $(cmd_files): ;       # Do not try to update included dependency files
1659   include $(cmd_files)
1660 endif
1661
1662 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1663 # Usage:
1664 # $(Q)$(MAKE) $(clean)=dir
1665 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1666
1667 endif   # skip-makefile
1668
1669 PHONY += FORCE
1670 FORCE:
1671
1672 # Declare the contents of the .PHONY variable as phony.  We keep that
1673 # information in a variable se we can use it in if_changed and friends.
1674 .PHONY: $(PHONY)