Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 27
   4 EXTRAVERSION = .58
   5 NAME = Trembling Tortoise
   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 # 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 vmlinux), 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 # Cancel implicit rules on top Makefile
 112 $(CURDIR)/Makefile Makefile: ;
 113
 114 ifneq ($(KBUILD_OUTPUT),)
 115 # Invoke a second make in the output directory, passing relevant variables
 116 # check that the output directory actually exists
 117 saved-output := $(KBUILD_OUTPUT)
 118 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 119 $(if $(KBUILD_OUTPUT),, \
 120      $(error output directory "$(saved-output)" does not exist))
 121
 122 PHONY += $(MAKECMDGOALS) sub-make
 123
 124 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
 125         $(Q)@:
 126
 127 sub-make: FORCE
 128         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 129         KBUILD_SRC=$(CURDIR) \
 130         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
 131         $(filter-out _all sub-make,$(MAKECMDGOALS))
 132
 133 # Leave processing to above invocation of make
 134 skip-makefile := 1
 135 endif # ifneq ($(KBUILD_OUTPUT),)
 136 endif # ifeq ($(KBUILD_SRC),)
 137
 138 # We process the rest of the Makefile if this is the final invocation of make
 139 ifeq ($(skip-makefile),)
 140
 141 # If building an external module we do not care about the all: rule
 142 # but instead _all depend on modules
 143 PHONY += all
 144 ifeq ($(KBUILD_EXTMOD),)
 145 _all: all
 146 else
 147 _all: modules
 148 endif
 149
 150 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 151 TOPDIR          := $(srctree)
 152 # FIXME - TOPDIR is obsolete, use srctree/objtree
 153 objtree         := $(CURDIR)
 154 src             := $(srctree)
 155 obj             := $(objtree)
 156
 157 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 158
 159 export srctree objtree VPATH TOPDIR
 160
 161
 162 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 163 # first, and if a usermode build is happening, the "ARCH=um" on the command
 164 # line overrides the setting of ARCH below.  If a native build is happening,
 165 # then ARCH is assigned, getting whatever value it gets normally, and
 166 # SUBARCH is subsequently ignored.
 167
 168 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 169                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 170                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 171                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 172                                   -e s/sh.*/sh/ )
 173
 174 # Cross compiling and selecting different set of gcc/bin-utils
 175 # ---------------------------------------------------------------------------
 176 #
 177 # When performing cross compilation for other architectures ARCH shall be set
 178 # to the target architecture. (See arch/* for the possibilities).
 179 # ARCH can be set during invocation of make:
 180 # make ARCH=ia64
 181 # Another way is to have ARCH set in the environment.
 182 # The default ARCH is the host where make is executed.
 183
 184 # CROSS_COMPILE specify the prefix used for all executables used
 185 # during compilation. Only gcc and related bin-utils executables
 186 # are prefixed with $(CROSS_COMPILE).
 187 # CROSS_COMPILE can be set on the command line
 188 # make CROSS_COMPILE=ia64-linux-
 189 # Alternatively CROSS_COMPILE can be set in the environment.
 190 # Default value for CROSS_COMPILE is not to prefix executables
 191 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 192 export KBUILD_BUILDHOST := $(SUBARCH)
 193 ARCH            ?= $(SUBARCH)
 194 CROSS_COMPILE   ?=
 195
 196 # Architecture as present in compile.h
 197 UTS_MACHINE     := $(ARCH)
 198 SRCARCH         := $(ARCH)
 199
 200 # Additional ARCH settings for x86
 201 ifeq ($(ARCH),i386)
 202         SRCARCH := x86
 203 endif
 204 ifeq ($(ARCH),x86_64)
 205         SRCARCH := x86
 206 endif
 207
 208 # Where to locate arch specific headers
 209 ifeq ($(ARCH),sparc64)
 210        hdr-arch  := sparc
 211 else
 212        hdr-arch  := $(SRCARCH)
 213 endif
 214
 215 KCONFIG_CONFIG  ?= .config
 216
 217 # SHELL used by kbuild
 218 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 219           else if [ -x /bin/bash ]; then echo /bin/bash; \
 220           else echo sh; fi ; fi)
 221
 222 HOSTCC       = gcc
 223 HOSTCXX      = g++
 224 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 225 HOSTCXXFLAGS = -O2
 226
 227 # Decide whether to build built-in, modular, or both.
 228 # Normally, just do built-in.
 229
 230 KBUILD_MODULES :=
 231 KBUILD_BUILTIN := 1
 232
 233 #       If we have only "make modules", don't compile built-in objects.
 234 #       When we're building modules with modversions, we need to consider
 235 #       the built-in objects during the descend as well, in order to
 236 #       make sure the checksums are up to date before we record them.
 237
 238 ifeq ($(MAKECMDGOALS),modules)
 239   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 240 endif
 241
 242 #       If we have "make <whatever> modules", compile modules
 243 #       in addition to whatever we do anyway.
 244 #       Just "make" or "make all" shall build modules as well
 245
 246 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 247   KBUILD_MODULES := 1
 248 endif
 249
 250 ifeq ($(MAKECMDGOALS),)
 251   KBUILD_MODULES := 1
 252 endif
 253
 254 export KBUILD_MODULES KBUILD_BUILTIN
 255 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 256
 257 # Beautify output
 258 # ---------------------------------------------------------------------------
 259 #
 260 # Normally, we echo the whole command before executing it. By making
 261 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 262 # $(quiet) to choose other forms of output instead, e.g.
 263 #
 264 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 265 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 266 #
 267 # If $(quiet) is empty, the whole command will be printed.
 268 # If it is set to "quiet_", only the short version will be printed.
 269 # If it is set to "silent_", nothing will be printed at all, since
 270 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 271 #
 272 # A simple variant is to prefix commands with $(Q) - that's useful
 273 # for commands that shall be hidden in non-verbose mode.
 274 #
 275 #       $(Q)ln $@ :<
 276 #
 277 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 278 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 279
 280 ifeq ($(KBUILD_VERBOSE),1)
 281   quiet =
 282   Q =
 283 else
 284   quiet=quiet_
 285   Q = @
 286 endif
 287
 288 # If the user is running make -s (silent mode), suppress echoing of
 289 # commands
 290
 291 ifneq ($(findstring s,$(MAKEFLAGS)),)
 292   quiet=silent_
 293 endif
 294
 295 export quiet Q KBUILD_VERBOSE
 296
 297
 298 # Look for make include files relative to root of kernel src
 299 MAKEFLAGS += --include-dir=$(srctree)
 300
 301 # We need some generic definitions (do not try to remake the file).
 302 $(srctree)/scripts/Kbuild.include: ;
 303 include $(srctree)/scripts/Kbuild.include
 304
 305 # Make variables (CC, etc...)
 306
 307 AS              = $(CROSS_COMPILE)as
 308 LD              = $(CROSS_COMPILE)ld
 309 CC              = $(CROSS_COMPILE)gcc
 310 CPP             = $(CC) -E
 311 AR              = $(CROSS_COMPILE)ar
 312 NM              = $(CROSS_COMPILE)nm
 313 STRIP           = $(CROSS_COMPILE)strip
 314 OBJCOPY         = $(CROSS_COMPILE)objcopy
 315 OBJDUMP         = $(CROSS_COMPILE)objdump
 316 AWK             = awk
 317 GENKSYMS        = scripts/genksyms/genksyms
 318 DEPMOD          = /sbin/depmod
 319 KALLSYMS        = scripts/kallsyms
 320 PERL            = perl
 321 CHECK           = sparse
 322
 323 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 324 MODFLAGS        = -DMODULE
 325 CFLAGS_MODULE   = $(MODFLAGS)
 326 AFLAGS_MODULE   = $(MODFLAGS)
 327 LDFLAGS_MODULE  =
 328 CFLAGS_KERNEL   =
 329 AFLAGS_KERNEL   =
 330
 331
 332 # Use LINUXINCLUDE when you must reference the include/ directory.
 333 # Needed to be compatible with the O= option
 334 LINUXINCLUDE    := -Iinclude \
 335                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 336                    -I$(srctree)/arch/$(hdr-arch)/include               \
 337                    -include include/linux/autoconf.h
 338
 339 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
 340
 341 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 342                    -fno-strict-aliasing -fno-common \
 343                    -Werror-implicit-function-declaration \
 344                    -fno-delete-null-pointer-checks
 345 KBUILD_AFLAGS   := -D__ASSEMBLY__
 346
 347 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 348 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 349 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 350
 351 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 352 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 353 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 354 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 355
 356 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 357 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 358 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 359
 360 # When compiling out-of-tree modules, put MODVERDIR in the module
 361 # tree rather than in the kernel tree. The kernel tree might
 362 # even be read-only.
 363 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 364
 365 # Files to ignore in find ... statements
 366
 367 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
 368 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 369
 370 # ===========================================================================
 371 # Rules shared between *config targets and build targets
 372
 373 # Basic helpers built in scripts/
 374 PHONY += scripts_basic
 375 scripts_basic:
 376         $(Q)$(MAKE) $(build)=scripts/basic
 377
 378 # To avoid any implicit rule to kick in, define an empty command.
 379 scripts/basic/%: scripts_basic ;
 380
 381 PHONY += outputmakefile
 382 # outputmakefile generates a Makefile in the output directory, if using a
 383 # separate output directory. This allows convenient use of make in the
 384 # output directory.
 385 outputmakefile:
 386 ifneq ($(KBUILD_SRC),)
 387         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 388             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 389 endif
 390
 391 # To make sure we do not include .config for any of the *config targets
 392 # catch them early, and hand them over to scripts/kconfig/Makefile
 393 # It is allowed to specify more targets when calling make, including
 394 # mixing *config targets and build targets.
 395 # For example 'make oldconfig all'.
 396 # Detect when mixed targets is specified, and make a second invocation
 397 # of make so .config is not included in this case either (for *config).
 398
 399 no-dot-config-targets := clean mrproper distclean \
 400                          cscope TAGS tags help %docs check% \
 401                          include/linux/version.h headers_% \
 402                          kernelrelease kernelversion
 403
 404 config-targets := 0
 405 mixed-targets  := 0
 406 dot-config     := 1
 407
 408 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 409         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 410                 dot-config := 0
 411         endif
 412 endif
 413
 414 ifeq ($(KBUILD_EXTMOD),)
 415         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 416                 config-targets := 1
 417                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 418                         mixed-targets := 1
 419                 endif
 420         endif
 421 endif
 422
 423 ifeq ($(mixed-targets),1)
 424 # ===========================================================================
 425 # We're called with mixed targets (*config and build targets).
 426 # Handle them one by one.
 427
 428 %:: FORCE
 429         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 430
 431 else
 432 ifeq ($(config-targets),1)
 433 # ===========================================================================
 434 # *config targets only - make sure prerequisites are updated, and descend
 435 # in scripts/kconfig to make the *config target
 436
 437 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 438 # KBUILD_DEFCONFIG may point out an alternative default configuration
 439 # used for 'make defconfig'
 440 include $(srctree)/arch/$(SRCARCH)/Makefile
 441 export KBUILD_DEFCONFIG
 442
 443 config: scripts_basic outputmakefile FORCE
 444         $(Q)mkdir -p include/linux include/config
 445         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 446
 447 %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_FTRACE
 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 # disable invalid "can't wrap" optimzations for signed / pointers
 564 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
 565
 566 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
 567 # But warn user when we do so
 568 warn-assign = \
 569 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
 570
 571 ifneq ($(KCPPFLAGS),)
 572         $(call warn-assign,CPPFLAGS)
 573         KBUILD_CPPFLAGS += $(KCPPFLAGS)
 574 endif
 575 ifneq ($(KAFLAGS),)
 576         $(call warn-assign,AFLAGS)
 577         KBUILD_AFLAGS += $(KAFLAGS)
 578 endif
 579 ifneq ($(KCFLAGS),)
 580         $(call warn-assign,CFLAGS)
 581         KBUILD_CFLAGS += $(KCFLAGS)
 582 endif
 583
 584 # Use --build-id when available.
 585 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 586                               $(call ld-option, -Wl$(comma)--build-id,))
 587 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 588 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 589
 590 # Default kernel image to build when no specific target is given.
 591 # KBUILD_IMAGE may be overruled on the command line or
 592 # set in the environment
 593 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 594 # this default value
 595 export KBUILD_IMAGE ?= vmlinux
 596
 597 #
 598 # INSTALL_PATH specifies where to place the updated kernel and system map
 599 # images. Default is /boot, but you can set it to other values
 600 export  INSTALL_PATH ?= /boot
 601
 602 #
 603 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 604 # relocations required by build roots.  This is not defined in the
 605 # makefile but the argument can be passed to make if needed.
 606 #
 607
 608 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 609 export MODLIB
 610
 611 #
 612 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 613 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 614 #  the default option --strip-debug will be used.  Otherwise,
 615 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 616
 617 ifdef INSTALL_MOD_STRIP
 618 ifeq ($(INSTALL_MOD_STRIP),1)
 619 mod_strip_cmd = $(STRIP) --strip-debug
 620 else
 621 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 622 endif # INSTALL_MOD_STRIP=1
 623 else
 624 mod_strip_cmd = true
 625 endif # INSTALL_MOD_STRIP
 626 export mod_strip_cmd
 627
 628
 629 ifeq ($(KBUILD_EXTMOD),)
 630 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 631
 632 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 633                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 634                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 635
 636 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 637                      $(init-n) $(init-) \
 638                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 639                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 640
 641 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 642 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 643 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 644 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 645 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 646 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 647 libs-y          := $(libs-y1) $(libs-y2)
 648
 649 # Build vmlinux
 650 # ---------------------------------------------------------------------------
 651 # vmlinux is built from the objects selected by $(vmlinux-init) and
 652 # $(vmlinux-main). Most are built-in.o files from top-level directories
 653 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 654 # Ordering when linking is important, and $(vmlinux-init) must be first.
 655 #
 656 # vmlinux
 657 #   ^
 658 #   |
 659 #   +-< $(vmlinux-init)
 660 #   |   +--< init/version.o + more
 661 #   |
 662 #   +--< $(vmlinux-main)
 663 #   |    +--< driver/built-in.o mm/built-in.o + more
 664 #   |
 665 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 666 #
 667 # vmlinux version (uname -v) cannot be updated during normal
 668 # descending-into-subdirs phase since we do not yet know if we need to
 669 # update vmlinux.
 670 # Therefore this step is delayed until just before final link of vmlinux -
 671 # except in the kallsyms case where it is done just before adding the
 672 # symbols to the kernel.
 673 #
 674 # System.map is generated to document addresses of all kernel symbols
 675
 676 vmlinux-init := $(head-y) $(init-y)
 677 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 678 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 679 vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
 680 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 681
 682 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 683 # May be overridden by arch/$(ARCH)/Makefile
 684 quiet_cmd_vmlinux__ ?= LD      $@
 685       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 686       -T $(vmlinux-lds) $(vmlinux-init)                          \
 687       --start-group $(vmlinux-main) --end-group                  \
 688       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
 689
 690 # Generate new vmlinux version
 691 quiet_cmd_vmlinux_version = GEN     .version
 692       cmd_vmlinux_version = set -e;                     \
 693         if [ ! -r .version ]; then                      \
 694           rm -f .version;                               \
 695           echo 1 >.version;                             \
 696         else                                            \
 697           mv .version .old_version;                     \
 698           expr 0$$(cat .old_version) + 1 >.version;     \
 699         fi;                                             \
 700         $(MAKE) $(build)=init
 701
 702 # Generate System.map
 703 quiet_cmd_sysmap = SYSMAP
 704       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 705
 706 # Link of vmlinux
 707 # If CONFIG_KALLSYMS is set .version is already updated
 708 # Generate System.map and verify that the content is consistent
 709 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 710 # First command is ':' to allow us to use + in front of the rule
 711 define rule_vmlinux__
 712         :
 713         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 714
 715         $(call cmd,vmlinux__)
 716         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 717
 718         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 719           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 720         $(cmd_sysmap) $@ System.map;                                         \
 721         if [ $$? -ne 0 ]; then                                               \
 722                 rm -f $@;                                                    \
 723                 /bin/false;                                                  \
 724         fi;
 725         $(verify_kallsyms)
 726 endef
 727
 728
 729 ifdef CONFIG_KALLSYMS
 730 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 731 # It's a three stage process:
 732 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 733 #   empty
 734 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 735 #   the right size - vmlinux version (uname -v) is updated during this step
 736 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 737 #   but due to the added section, some addresses have shifted.
 738 #   From here, we generate a correct .tmp_kallsyms2.o
 739 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 740 # o Verify that the System.map from vmlinux matches the map from
 741 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 742 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 743 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 744 #   temporary bypass to allow the kernel to be built while the
 745 #   maintainers work out what went wrong with kallsyms.
 746
 747 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 748 last_kallsyms := 3
 749 else
 750 last_kallsyms := 2
 751 endif
 752
 753 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 754
 755 define verify_kallsyms
 756         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 757           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 758           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 759         $(Q)cmp -s System.map .tmp_System.map ||                             \
 760                 (echo Inconsistent kallsyms data;                            \
 761                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 762                  rm .tmp_kallsyms* ; /bin/false )
 763 endef
 764
 765 # Update vmlinux version before link
 766 # Use + in front of this rule to silent warning about make -j1
 767 # First command is ':' to allow us to use + in front of this rule
 768 cmd_ksym_ld = $(cmd_vmlinux__)
 769 define rule_ksym_ld
 770         :
 771         +$(call cmd,vmlinux_version)
 772         $(call cmd,vmlinux__)
 773         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 774 endef
 775
 776 # Generate .S file with all kernel symbols
 777 quiet_cmd_kallsyms = KSYM    $@
 778       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 779                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 780
 781 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 782         $(call if_changed_dep,as_o_S)
 783
 784 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 785         $(call cmd,kallsyms)
 786
 787 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 788 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 789         $(call if_changed_rule,ksym_ld)
 790
 791 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 792         $(call if_changed,vmlinux__)
 793
 794 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 795         $(call if_changed,vmlinux__)
 796
 797 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 798 $(KALLSYMS): scripts ;
 799
 800 # Generate some data for debugging strange kallsyms problems
 801 debug_kallsyms: .tmp_map$(last_kallsyms)
 802
 803 .tmp_map%: .tmp_vmlinux% FORCE
 804         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 805
 806 .tmp_map3: .tmp_map2
 807
 808 .tmp_map2: .tmp_map1
 809
 810 endif # ifdef CONFIG_KALLSYMS
 811
 812 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 813 # relevant sections renamed as per the linker script.
 814 quiet_cmd_vmlinux-modpost = LD      $@
 815       cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 816          $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
 817          $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 818 define rule_vmlinux-modpost
 819         :
 820         +$(call cmd,vmlinux-modpost)
 821         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 822         $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
 823 endef
 824
 825 # vmlinux image - including updated kernel symbols
 826 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
 827 ifdef CONFIG_HEADERS_CHECK
 828         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 829 endif
 830 ifdef CONFIG_SAMPLES
 831         $(Q)$(MAKE) $(build)=samples
 832 endif
 833 ifdef CONFIG_BUILD_DOCSRC
 834         $(Q)$(MAKE) $(build)=Documentation
 835 endif
 836         $(call vmlinux-modpost)
 837         $(call if_changed_rule,vmlinux__)
 838         $(Q)rm -f .old_version
 839
 840 # build vmlinux.o first to catch section mismatch errors early
 841 ifdef CONFIG_KALLSYMS
 842 .tmp_vmlinux1: vmlinux.o
 843 endif
 844
 845 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
 846 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
 847         $(call if_changed_rule,vmlinux-modpost)
 848
 849 # The actual objects are generated when descending,
 850 # make sure no implicit rule kicks in
 851 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 852
 853 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 854 # Preset locale variables to speed up the build process. Limit locale
 855 # tweaks to this spot to avoid wrong language settings when running
 856 # make menuconfig etc.
 857 # Error messages still appears in the original language
 858
 859 PHONY += $(vmlinux-dirs)
 860 $(vmlinux-dirs): prepare scripts
 861         $(Q)$(MAKE) $(build)=$@
 862
 863 # Build the kernel release string
 864 #
 865 # The KERNELRELEASE value built here is stored in the file
 866 # include/config/kernel.release, and is used when executing several
 867 # make targets, such as "make install" or "make modules_install."
 868 #
 869 # The eventual kernel release string consists of the following fields,
 870 # shown in a hierarchical format to show how smaller parts are concatenated
 871 # to form the larger and final value, with values coming from places like
 872 # the Makefile, kernel config options, make command line options and/or
 873 # SCM tag information.
 874 #
 875 #       $(KERNELVERSION)
 876 #         $(VERSION)                    eg, 2
 877 #         $(PATCHLEVEL)                 eg, 6
 878 #         $(SUBLEVEL)                   eg, 18
 879 #         $(EXTRAVERSION)               eg, -rc6
 880 #       $(localver-full)
 881 #         $(localver)
 882 #           localversion*               (files without backups, containing '~')
 883 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 884 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 885 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 886 #           $(LOCALVERSION)             (from make command line if provided)
 887 #
 888 #  Note how the final $(localver-auto) string is included *only* if the
 889 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 890 # moment, only git is supported but other SCMs can edit the script
 891 # scripts/setlocalversion and add the appropriate checks as needed.
 892
 893 pattern = ".*/localversion[^~]*"
 894 string  = $(shell cat /dev/null \
 895            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 896
 897 localver = $(subst $(space),, $(string) \
 898                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 899
 900 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 901 # and if the SCM is know a tag from the SCM is appended.
 902 # The appended tag is determined by the SCM used.
 903 #
 904 # Currently, only git is supported.
 905 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 906 # checks as needed.
 907 ifdef CONFIG_LOCALVERSION_AUTO
 908         _localver-auto = $(shell $(CONFIG_SHELL) \
 909                           $(srctree)/scripts/setlocalversion $(srctree))
 910         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 911 endif
 912
 913 localver-full = $(localver)$(localver-auto)
 914
 915 # Store (new) KERNELRELASE string in include/config/kernel.release
 916 kernelrelease = $(KERNELVERSION)$(localver-full)
 917 include/config/kernel.release: include/config/auto.conf FORCE
 918         $(Q)rm -f $@
 919         $(Q)echo $(kernelrelease) > $@
 920
 921
 922 # Things we need to do before we recursively start building the kernel
 923 # or the modules are listed in "prepare".
 924 # A multi level approach is used. prepareN is processed before prepareN-1.
 925 # archprepare is used in arch Makefiles and when processed asm symlink,
 926 # version.h and scripts_basic is processed / created.
 927
 928 # Listed in dependency order
 929 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 930
 931 # prepare3 is used to check if we are building in a separate output directory,
 932 # and if so do:
 933 # 1) Check that make has not been executed in the kernel src $(srctree)
 934 # 2) Create the include2 directory, used for the second asm symlink
 935 prepare3: include/config/kernel.release
 936 ifneq ($(KBUILD_SRC),)
 937         @echo '  Using $(srctree) as source for kernel'
 938         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 939                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 940                 echo "  in the '$(srctree)' directory.";\
 941                 /bin/false; \
 942         fi;
 943         $(Q)if [ ! -d include2 ]; then                                  \
 944             mkdir -p include2;                                          \
 945             ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 946         fi
 947 endif
 948
 949 # prepare2 creates a makefile if using a separate output directory
 950 prepare2: prepare3 outputmakefile
 951
 952 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 953                    include/asm include/config/auto.conf
 954         $(cmd_crmodverdir)
 955
 956 archprepare: prepare1 scripts_basic
 957
 958 prepare0: archprepare FORCE
 959         $(Q)$(MAKE) $(build)=.
 960         $(Q)$(MAKE) $(build)=. missing-syscalls
 961
 962 # All the preparing..
 963 prepare: prepare0
 964
 965 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 966 # done in arch/$(ARCH)/kernel/Makefile
 967
 968 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 969
 970 # The asm symlink changes when $(ARCH) changes.
 971 # Detect this and ask user to run make mrproper
 972 define check-symlink
 973         set -e;                                                            \
 974         if [ -L include/asm ]; then                                        \
 975                 asmlink=`readlink include/asm | cut -d '-' -f 2`;          \
 976                 if [ "$$asmlink" != "$(SRCARCH)" ]; then                   \
 977                         echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
 978                         echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
 979                         exit 1;                                            \
 980                 fi;                                                        \
 981         fi
 982 endef
 983
 984 # We create the target directory of the symlink if it does
 985 # not exist so the test in chack-symlink works and we have a
 986 # directory for generated filesas used by some architectures.
 987 define create-symlink
 988         if [ ! -L include/asm ]; then                                      \
 989                         echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';     \
 990                         if [ ! -d include/asm-$(SRCARCH) ]; then           \
 991                                 mkdir -p include/asm-$(SRCARCH);           \
 992                         fi;                                                \
 993                         ln -fsn asm-$(SRCARCH) $@;                         \
 994         fi
 995 endef
 996
 997 include/asm: FORCE
 998         $(Q)$(check-symlink)
 999         $(Q)$(create-symlink)
1000
1001 # Generate some files
1002 # ---------------------------------------------------------------------------
1003
1004 # KERNELRELEASE can change from a few different places, meaning version.h
1005 # needs to be updated, so this check is forced on all builds
1006
1007 uts_len := 64
1008 define filechk_utsrelease.h
1009         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1010           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1011           exit 1;                                                         \
1012         fi;                                                               \
1013         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1014 endef
1015
1016 define filechk_version.h
1017         (echo \#define LINUX_VERSION_CODE $(shell                             \
1018         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
1019         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1020 endef
1021
1022 include/linux/version.h: $(srctree)/Makefile FORCE
1023         $(call filechk,version.h)
1024
1025 include/linux/utsrelease.h: include/config/kernel.release FORCE
1026         $(call filechk,utsrelease.h)
1027
1028 # ---------------------------------------------------------------------------
1029
1030 PHONY += depend dep
1031 depend dep:
1032         @echo '*** Warning: make $@ is unnecessary now.'
1033
1034 # ---------------------------------------------------------------------------
1035 # Firmware install
1036 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1037 export INSTALL_FW_PATH
1038
1039 PHONY += firmware_install
1040 firmware_install: FORCE
1041         @mkdir -p $(objtree)/firmware
1042         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1043
1044 # ---------------------------------------------------------------------------
1045 # Kernel headers
1046
1047 #Default location for installed headers
1048 export INSTALL_HDR_PATH = $(objtree)/usr
1049
1050 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1051 # Find out where the Kbuild file is located to support
1052 # arch/$(ARCH)/include/asm
1053 hdr-dir = $(strip                                                         \
1054           $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1055                arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1056
1057 # If we do an all arch process set dst to asm-$(hdr-arch)
1058 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1059
1060 PHONY += __headers
1061 __headers: include/linux/version.h scripts_basic FORCE
1062         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1063
1064 PHONY += headers_install_all
1065 headers_install_all:
1066         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1067
1068 PHONY += headers_install
1069 headers_install: __headers
1070         $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1071         $(error Headers not exportable for the $(SRCARCH) architecture))
1072         $(Q)$(MAKE) $(hdr-inst)=include
1073         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1074
1075 PHONY += headers_check_all
1076 headers_check_all: headers_install_all
1077         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1078
1079 PHONY += headers_check
1080 headers_check: headers_install
1081         $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1082         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1083
1084 # ---------------------------------------------------------------------------
1085 # Modules
1086
1087 ifdef CONFIG_MODULES
1088
1089 # By default, build modules as well
1090
1091 all: modules
1092
1093 #       Build modules
1094 #
1095 #       A module can be listed more than once in obj-m resulting in
1096 #       duplicate lines in modules.order files.  Those are removed
1097 #       using awk while concatenating to the final file.
1098
1099 PHONY += modules
1100 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1101         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1102         @echo '  Building modules, stage 2.';
1103         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1104         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1105
1106
1107 # Target to prepare building external modules
1108 PHONY += modules_prepare
1109 modules_prepare: prepare scripts
1110
1111 # Target to install modules
1112 PHONY += modules_install
1113 modules_install: _modinst_ _modinst_post
1114
1115 PHONY += _modinst_
1116 _modinst_:
1117         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1118                 echo "Warning: you may need to install module-init-tools"; \
1119                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1120                 sleep 1; \
1121         fi
1122         @rm -rf $(MODLIB)/kernel
1123         @rm -f $(MODLIB)/source
1124         @mkdir -p $(MODLIB)/kernel
1125         @ln -s $(srctree) $(MODLIB)/source
1126         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1127                 rm -f $(MODLIB)/build ; \
1128                 ln -s $(objtree) $(MODLIB)/build ; \
1129         fi
1130         @cp -f $(objtree)/modules.order $(MODLIB)/
1131         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1132
1133 # This depmod is only for convenience to give the initial
1134 # boot a modules.dep even before / is mounted read-write.  However the
1135 # boot script depmod is the master version.
1136 PHONY += _modinst_post
1137 _modinst_post: _modinst_
1138         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1139         $(call cmd,depmod)
1140
1141 else # CONFIG_MODULES
1142
1143 # Modules not configured
1144 # ---------------------------------------------------------------------------
1145
1146 modules modules_install: FORCE
1147         @echo
1148         @echo "The present kernel configuration has modules disabled."
1149         @echo "Type 'make config' and enable loadable module support."
1150         @echo "Then build a kernel with module support enabled."
1151         @echo
1152         @exit 1
1153
1154 endif # CONFIG_MODULES
1155
1156 ###
1157 # Cleaning is done on three levels.
1158 # make clean     Delete most generated files
1159 #                Leave enough to build external modules
1160 # make mrproper  Delete the current configuration, and all generated files
1161 # make distclean Remove editor backup files, patch leftover files and the like
1162
1163 # Directories & files removed with 'make clean'
1164 CLEAN_DIRS  += $(MODVERDIR)
1165 CLEAN_FILES +=  vmlinux System.map \
1166                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1167
1168 # Directories & files removed with 'make mrproper'
1169 MRPROPER_DIRS  += include/config include2 usr/include
1170 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1171                   include/linux/autoconf.h include/linux/version.h      \
1172                   include/linux/utsrelease.h                            \
1173                   include/linux/bounds.h include/asm*/asm-offsets.h     \
1174                   Module.symvers Module.markers tags TAGS cscope*
1175
1176 # clean - Delete most, but leave enough to build external modules
1177 #
1178 clean: rm-dirs  := $(CLEAN_DIRS)
1179 clean: rm-files := $(CLEAN_FILES)
1180 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1181
1182 PHONY += $(clean-dirs) clean archclean
1183 $(clean-dirs):
1184         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1185
1186 clean: archclean $(clean-dirs)
1187         $(call cmd,rmdirs)
1188         $(call cmd,rmfiles)
1189         @find . $(RCS_FIND_IGNORE) \
1190                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1191                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1192                 -o -name '*.symtypes' -o -name 'modules.order' \
1193                 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
1194                 -type f -print | xargs rm -f
1195
1196 # mrproper - Delete all generated files, including .config
1197 #
1198 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1199 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1200 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1201
1202 PHONY += $(mrproper-dirs) mrproper archmrproper
1203 $(mrproper-dirs):
1204         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1205
1206 mrproper: clean archmrproper $(mrproper-dirs)
1207         $(call cmd,rmdirs)
1208         $(call cmd,rmfiles)
1209
1210 # distclean
1211 #
1212 PHONY += distclean
1213
1214 distclean: mrproper
1215         @find $(srctree) $(RCS_FIND_IGNORE) \
1216                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1217                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1218                 -o -name '.*.rej' -o -size 0 \
1219                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1220                 -type f -print | xargs rm -f
1221
1222
1223 # Packaging of the kernel to various formats
1224 # ---------------------------------------------------------------------------
1225 # rpm target kept for backward compatibility
1226 package-dir     := $(srctree)/scripts/package
1227
1228 %pkg: include/config/kernel.release FORCE
1229         $(Q)$(MAKE) $(build)=$(package-dir) $@
1230 rpm: include/config/kernel.release FORCE
1231         $(Q)$(MAKE) $(build)=$(package-dir) $@
1232
1233
1234 # Brief documentation of the typical targets used
1235 # ---------------------------------------------------------------------------
1236
1237 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1238 boards := $(notdir $(boards))
1239 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1240 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1241
1242 help:
1243         @echo  'Cleaning targets:'
1244         @echo  '  clean           - Remove most generated files but keep the config and'
1245         @echo  '                    enough build support to build external modules'
1246         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1247         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1248         @echo  ''
1249         @echo  'Configuration targets:'
1250         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1251         @echo  ''
1252         @echo  'Other generic targets:'
1253         @echo  '  all             - Build all targets marked with [*]'
1254         @echo  '* vmlinux         - Build the bare kernel'
1255         @echo  '* modules         - Build all modules'
1256         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1257         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1258         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1259         @echo  '  dir/            - Build all files in dir and below'
1260         @echo  '  dir/file.[ois]  - Build specified target only'
1261         @echo  '  dir/file.ko     - Build module including final link'
1262         @echo  '  prepare         - Set up for building external modules'
1263         @echo  '  tags/TAGS       - Generate tags file for editors'
1264         @echo  '  cscope          - Generate cscope index'
1265         @echo  '  kernelrelease   - Output the release version string'
1266         @echo  '  kernelversion   - Output the version stored in Makefile'
1267         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1268          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1269          echo  ''
1270         @echo  'Static analysers'
1271         @echo  '  checkstack      - Generate a list of stack hogs'
1272         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1273         @echo  '  versioncheck    - Sanity check on version.h usage'
1274         @echo  '  includecheck    - Check for duplicate included header files'
1275         @echo  '  export_report   - List the usages of all exported symbols'
1276         @echo  '  headers_check   - Sanity check on exported headers'; \
1277          echo  ''
1278         @echo  'Kernel packaging:'
1279         @$(MAKE) $(build)=$(package-dir) help
1280         @echo  ''
1281         @echo  'Documentation targets:'
1282         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1283         @echo  ''
1284         @echo  'Architecture specific targets ($(SRCARCH)):'
1285         @$(if $(archhelp),$(archhelp),\
1286                 echo '  No architecture specific help defined for $(SRCARCH)')
1287         @echo  ''
1288         @$(if $(boards), \
1289                 $(foreach b, $(boards), \
1290                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1291                 echo '')
1292         @$(if $(board-dirs), \
1293                 $(foreach b, $(board-dirs), \
1294                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1295                 printf "  %-16s - Show all of the above\\n" help-boards; \
1296                 echo '')
1297
1298         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1299         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1300         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1301         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1302         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1303         @echo  ''
1304         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1305         @echo  'For further info see the ./README file'
1306
1307
1308 help-board-dirs := $(addprefix help-,$(board-dirs))
1309
1310 help-boards: $(help-board-dirs)
1311
1312 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1313
1314 $(help-board-dirs): help-%:
1315         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1316         @$(if $(boards-per-dir), \
1317                 $(foreach b, $(boards-per-dir), \
1318                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1319                 echo '')
1320
1321
1322 # Documentation targets
1323 # ---------------------------------------------------------------------------
1324 %docs: scripts_basic FORCE
1325         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1326
1327 else # KBUILD_EXTMOD
1328
1329 ###
1330 # External module support.
1331 # When building external modules the kernel used as basis is considered
1332 # read-only, and no consistency checks are made and the make
1333 # system is not used on the basis kernel. If updates are required
1334 # in the basis kernel ordinary make commands (without M=...) must
1335 # be used.
1336 #
1337 # The following are the only valid targets when building external
1338 # modules.
1339 # make M=dir clean     Delete all automatically generated files
1340 # make M=dir modules   Make all modules in specified dir
1341 # make M=dir           Same as 'make M=dir modules'
1342 # make M=dir modules_install
1343 #                      Install the modules built in the module directory
1344 #                      Assumes install directory is already created
1345
1346 # We are always building modules
1347 KBUILD_MODULES := 1
1348 PHONY += crmodverdir
1349 crmodverdir:
1350         $(cmd_crmodverdir)
1351
1352 PHONY += $(objtree)/Module.symvers
1353 $(objtree)/Module.symvers:
1354         @test -e $(objtree)/Module.symvers || ( \
1355         echo; \
1356         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1357         echo "           is missing; modules will have no dependencies and modversions."; \
1358         echo )
1359
1360 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1361 PHONY += $(module-dirs) modules
1362 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1363         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1364
1365 modules: $(module-dirs)
1366         @echo '  Building modules, stage 2.';
1367         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1368
1369 PHONY += modules_install
1370 modules_install: _emodinst_ _emodinst_post
1371
1372 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1373 PHONY += _emodinst_
1374 _emodinst_:
1375         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1376         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1377
1378 PHONY += _emodinst_post
1379 _emodinst_post: _emodinst_
1380         $(call cmd,depmod)
1381
1382 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1383
1384 PHONY += $(clean-dirs) clean
1385 $(clean-dirs):
1386         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1387
1388 clean:  rm-dirs := $(MODVERDIR)
1389 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1390 clean: $(clean-dirs)
1391         $(call cmd,rmdirs)
1392         $(call cmd,rmfiles)
1393         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1394                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1395                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1396                 -type f -print | xargs rm -f
1397
1398 help:
1399         @echo  '  Building external modules.'
1400         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1401         @echo  ''
1402         @echo  '  modules         - default target, build the module(s)'
1403         @echo  '  modules_install - install the module'
1404         @echo  '  clean           - remove generated files in module directory only'
1405         @echo  ''
1406
1407 # Dummies...
1408 PHONY += prepare scripts
1409 prepare: ;
1410 scripts: ;
1411 endif # KBUILD_EXTMOD
1412
1413 # Generate tags for editors
1414 # ---------------------------------------------------------------------------
1415
1416 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1417 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1418 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1419
1420 ifeq ($(src),$(obj))
1421 __srctree =
1422 else
1423 __srctree = $(srctree)/
1424 endif
1425
1426 ifeq ($(ALLSOURCE_ARCHS),)
1427 ifeq ($(ARCH),um)
1428 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1429 else
1430 ALLINCLUDE_ARCHS := $(SRCARCH)
1431 endif
1432 else
1433 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1434 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1435 endif
1436
1437 ALLSOURCE_ARCHS := $(SRCARCH)
1438
1439 define find-sources
1440         ( for arch in $(ALLSOURCE_ARCHS) ; do \
1441                find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1442                     -name $1 -print; \
1443           done ; \
1444           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1445                -name $1 -print; \
1446           find $(__srctree)include $(RCS_FIND_IGNORE) \
1447                \( -name config -o -name 'asm-*' \) -prune \
1448                -o -name $1 -print; \
1449           for arch in $(ALLINCLUDE_ARCHS) ; do \
1450                test -e $(__srctree)include/asm-$${arch} && \
1451                  find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1452                     -name $1 -print; \
1453                test -e $(__srctree)arch/$${arch}/include/asm && \
1454                  find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
1455                     -name $1 -print; \
1456           done ; \
1457           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1458                -name $1 -print; \
1459           find $(__srctree) $(RCS_FIND_IGNORE) \
1460                \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1461                -name $1 -print; \
1462           )
1463 endef
1464
1465 define all-sources
1466         $(call find-sources,'*.[chS]')
1467 endef
1468 define all-kconfigs
1469         $(call find-sources,'Kconfig*')
1470 endef
1471 define all-defconfigs
1472         $(call find-sources,'defconfig')
1473 endef
1474
1475 define xtags
1476         if $1 --version 2>&1 | grep -iq exuberant; then \
1477             $(all-sources) | xargs $1 -a \
1478                 -I __initdata,__exitdata,__acquires,__releases \
1479                 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1480                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1481                 --extra=+f --c-kinds=+px \
1482                 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1483             $(all-kconfigs) | xargs $1 -a \
1484                 --langdef=kconfig \
1485                 --language-force=kconfig \
1486                 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
1487             $(all-defconfigs) | xargs -r $1 -a \
1488                 --langdef=dotconfig \
1489                 --language-force=dotconfig \
1490                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1491         elif $1 --version 2>&1 | grep -iq emacs; then \
1492             $(all-sources) | xargs $1 -a; \
1493             $(all-kconfigs) | xargs $1 -a \
1494                 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
1495             $(all-defconfigs) | xargs -r $1 -a \
1496                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1497         else \
1498             $(all-sources) | xargs $1 -a; \
1499         fi
1500 endef
1501
1502 quiet_cmd_cscope-file = FILELST cscope.files
1503       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1504
1505 quiet_cmd_cscope = MAKE    cscope.out
1506       cmd_cscope = cscope -b -f cscope.out
1507
1508 cscope: FORCE
1509         $(call cmd,cscope-file)
1510         $(call cmd,cscope)
1511
1512 quiet_cmd_TAGS = MAKE   $@
1513 define cmd_TAGS
1514         rm -f $@; \
1515         $(call xtags,etags)
1516 endef
1517
1518 TAGS: FORCE
1519         $(call cmd,TAGS)
1520
1521 quiet_cmd_tags = MAKE   $@
1522 define cmd_tags
1523         rm -f $@; \
1524         $(call xtags,ctags)
1525 endef
1526
1527 tags: FORCE
1528         $(call cmd,tags)
1529
1530
1531 # Scripts to check various things for consistency
1532 # ---------------------------------------------------------------------------
1533
1534 includecheck:
1535         find * $(RCS_FIND_IGNORE) \
1536                 -name '*.[hcS]' -type f -print | sort \
1537                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1538
1539 versioncheck:
1540         find * $(RCS_FIND_IGNORE) \
1541                 -name '*.[hcS]' -type f -print | sort \
1542                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1543
1544 namespacecheck:
1545         $(PERL) $(srctree)/scripts/namespace.pl
1546
1547 export_report:
1548         $(PERL) $(srctree)/scripts/export_report.pl
1549
1550 endif #ifeq ($(config-targets),1)
1551 endif #ifeq ($(mixed-targets),1)
1552
1553 PHONY += checkstack kernelrelease kernelversion
1554
1555 # UML needs a little special treatment here.  It wants to use the host
1556 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1557 # else wants $(ARCH), including people doing cross-builds, which means
1558 # that $(SUBARCH) doesn't work here.
1559 ifeq ($(ARCH), um)
1560 CHECKSTACK_ARCH := $(SUBARCH)
1561 else
1562 CHECKSTACK_ARCH := $(ARCH)
1563 endif
1564 checkstack:
1565         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1566         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1567
1568 kernelrelease:
1569         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1570         $(error kernelrelease not valid - run 'make prepare' to update it))
1571 kernelversion:
1572         @echo $(KERNELVERSION)
1573
1574 # Single targets
1575 # ---------------------------------------------------------------------------
1576 # Single targets are compatible with:
1577 # - build with mixed source and output
1578 # - build with separate output dir 'make O=...'
1579 # - external modules
1580 #
1581 #  target-dir => where to store outputfile
1582 #  build-dir  => directory in kernel source tree to use
1583
1584 ifeq ($(KBUILD_EXTMOD),)
1585         build-dir  = $(patsubst %/,%,$(dir $@))
1586         target-dir = $(dir $@)
1587 else
1588         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1589         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1590         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1591 endif
1592
1593 %.s: %.c prepare scripts FORCE
1594         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1595 %.i: %.c prepare scripts FORCE
1596         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1597 %.o: %.c prepare scripts FORCE
1598         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1599 %.lst: %.c prepare scripts FORCE
1600         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1601 %.s: %.S prepare scripts FORCE
1602         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1603 %.o: %.S prepare scripts FORCE
1604         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1605 %.symtypes: %.c prepare scripts FORCE
1606         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1607
1608 # Modules
1609 /: prepare scripts FORCE
1610         $(cmd_crmodverdir)
1611         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1612         $(build)=$(build-dir)
1613 %/: prepare scripts FORCE
1614         $(cmd_crmodverdir)
1615         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1616         $(build)=$(build-dir)
1617 %.ko: prepare scripts FORCE
1618         $(cmd_crmodverdir)
1619         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1620         $(build)=$(build-dir) $(@:.ko=.o)
1621         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1622
1623 # FIXME Should go into a make.lib or something
1624 # ===========================================================================
1625
1626 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1627       cmd_rmdirs = rm -rf $(rm-dirs)
1628
1629 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1630       cmd_rmfiles = rm -f $(rm-files)
1631
1632 # Run depmod only if we have System.map and depmod is executable
1633 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1634       cmd_depmod = \
1635         if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1636                 $(DEPMOD) -ae -F System.map                                     \
1637                 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r)   \
1638                 $(KERNELRELEASE);                                               \
1639         fi
1640
1641 # Create temporary dir for module support files
1642 # clean it up only when building all modules
1643 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1644                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1645
1646 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1647           $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1648           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1649
1650 quiet_cmd_as_o_S = AS      $@
1651 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1652
1653 # read all saved command lines
1654
1655 targets := $(wildcard $(sort $(targets)))
1656 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1657
1658 ifneq ($(cmd_files),)
1659   $(cmd_files): ;       # Do not try to update included dependency files
1660   include $(cmd_files)
1661 endif
1662
1663 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1664 # Usage:
1665 # $(Q)$(MAKE) $(clean)=dir
1666 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1667
1668 endif   # skip-makefile
1669
1670 PHONY += FORCE
1671 FORCE:
1672
1673 # Declare the contents of the .PHONY variable as phony.  We keep that
1674 # information in a variable se we can use it in if_changed and friends.
1675 .PHONY: $(PHONY)