release/src-rt/linux/linux-2.6/Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 22
   4 EXTRAVERSION = .19
   5 NAME = Holy Dancing Manatees, Batman!
   6
   7 # *DOCUMENTATION*
   8 # To see a list of typical targets execute "make help"
   9 # More info can be located in ./README
  10 # Comments in this file are targeted only to the developer, do not
  11 # expect to learn how to build the kernel reading this file.
  12
  13 # Do not:
  14 # o  use make's built-in rules and variables
  15 #    (this increases performance and avoid hard-to-debug behavour);
  16 # o  print "Entering directory ...";
  17 MAKEFLAGS += -rR --no-print-directory
  18
  19 # We are using a recursive build, so we need to do a little thinking
  20 # to get the ordering right.
  21 #
  22 # Most importantly: sub-Makefiles should only ever modify files in
  23 # their own directory. If in some directory we have a dependency on
  24 # a file in another dir (which doesn't happen often, but it's often
  25 # unavoidable when linking the built-in.o targets which finally
  26 # turn into 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 := $(O)
 104   endif
 105 endif
 106
 107 # That's our default target when none is given on the command line
 108 PHONY := _all
 109 _all:
 110
 111 ifneq ($(KBUILD_OUTPUT),)
 112 # Invoke a second make in the output directory, passing relevant variables
 113 # check that the output directory actually exists
 114 saved-output := $(KBUILD_OUTPUT)
 115 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 116 $(if $(KBUILD_OUTPUT),, \
 117      $(error output directory "$(saved-output)" does not exist))
 118
 119 PHONY += $(MAKECMDGOALS)
 120
 121 $(filter-out _all,$(MAKECMDGOALS)) _all:
 122         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 123         KBUILD_SRC=$(CURDIR) \
 124         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
 125
 126 # Leave processing to above invocation of make
 127 skip-makefile := 1
 128 endif # ifneq ($(KBUILD_OUTPUT),)
 129 endif # ifeq ($(KBUILD_SRC),)
 130
 131 # We process the rest of the Makefile if this is the final invocation of make
 132 ifeq ($(skip-makefile),)
 133
 134 # If building an external module we do not care about the all: rule
 135 # but instead _all depend on modules
 136 PHONY += all
 137 ifeq ($(KBUILD_EXTMOD),)
 138 _all: all
 139 else
 140 _all: modules
 141 endif
 142
 143 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 144 TOPDIR          := $(srctree)
 145 # FIXME - TOPDIR is obsolete, use srctree/objtree
 146 objtree         := $(CURDIR)
 147 src             := $(srctree)
 148 obj             := $(objtree)
 149
 150 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 151
 152 export srctree objtree VPATH TOPDIR
 153
 154
 155 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 156 # first, and if a usermode build is happening, the "ARCH=um" on the command
 157 # line overrides the setting of ARCH below.  If a native build is happening,
 158 # then ARCH is assigned, getting whatever value it gets normally, and
 159 # SUBARCH is subsequently ignored.
 160
 161 SUBARCH := mips
 162
 163 # Cross compiling and selecting different set of gcc/bin-utils
 164 # ---------------------------------------------------------------------------
 165 #
 166 # When performing cross compilation for other architectures ARCH shall be set
 167 # to the target architecture. (See arch/* for the possibilities).
 168 # ARCH can be set during invocation of make:
 169 # make ARCH=ia64
 170 # Another way is to have ARCH set in the environment.
 171 # The default ARCH is the host where make is executed.
 172
 173 # CROSS_COMPILE specify the prefix used for all executables used
 174 # during compilation. Only gcc and related bin-utils executables
 175 # are prefixed with $(CROSS_COMPILE).
 176 # CROSS_COMPILE can be set on the command line
 177 # make CROSS_COMPILE=ia64-linux-
 178 # Alternatively CROSS_COMPILE can be set in the environment.
 179 # Default value for CROSS_COMPILE is not to prefix executables
 180 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 181
 182 ARCH            ?= $(SUBARCH)
 183 CROSS_COMPILE   ?=
 184
 185 # Architecture as present in compile.h
 186 UTS_MACHINE := $(ARCH)
 187
 188 KCONFIG_CONFIG  ?= .config
 189
 190 # SHELL used by kbuild
 191 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 192           else if [ -x /bin/bash ]; then echo /bin/bash; \
 193           else echo sh; fi ; fi)
 194
 195 HOSTCC       = gcc
 196 HOSTCXX      = g++
 197 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 198 HOSTCXXFLAGS = -O2
 199
 200 # Decide whether to build built-in, modular, or both.
 201 # Normally, just do built-in.
 202
 203 KBUILD_MODULES :=
 204 KBUILD_BUILTIN := 1
 205
 206 #       If we have only "make modules", don't compile built-in objects.
 207 #       When we're building modules with modversions, we need to consider
 208 #       the built-in objects during the descend as well, in order to
 209 #       make sure the checksums are up to date before we record them.
 210
 211 ifeq ($(MAKECMDGOALS),modules)
 212   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 213 endif
 214
 215 #       If we have "make <whatever> modules", compile modules
 216 #       in addition to whatever we do anyway.
 217 #       Just "make" or "make all" shall build modules as well
 218
 219 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 220   KBUILD_MODULES := 1
 221 endif
 222
 223 ifeq ($(MAKECMDGOALS),)
 224   KBUILD_MODULES := 1
 225 endif
 226
 227 export KBUILD_MODULES KBUILD_BUILTIN
 228 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 229
 230 # Beautify output
 231 # ---------------------------------------------------------------------------
 232 #
 233 # Normally, we echo the whole command before executing it. By making
 234 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 235 # $(quiet) to choose other forms of output instead, e.g.
 236 #
 237 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 238 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 239 #
 240 # If $(quiet) is empty, the whole command will be printed.
 241 # If it is set to "quiet_", only the short version will be printed.
 242 # If it is set to "silent_", nothing will be printed at all, since
 243 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 244 #
 245 # A simple variant is to prefix commands with $(Q) - that's useful
 246 # for commands that shall be hidden in non-verbose mode.
 247 #
 248 #       $(Q)ln $@ :<
 249 #
 250 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 251 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 252
 253 ifeq ($(KBUILD_VERBOSE),1)
 254   quiet =
 255   Q =
 256 else
 257   quiet=quiet_
 258   Q = @
 259 endif
 260
 261 # If the user is running make -s (silent mode), suppress echoing of
 262 # commands
 263
 264 ifneq ($(findstring s,$(MAKEFLAGS)),)
 265   quiet=silent_
 266 endif
 267
 268 export quiet Q KBUILD_VERBOSE
 269
 270
 271 # Look for make include files relative to root of kernel src
 272 MAKEFLAGS += --include-dir=$(srctree)
 273
 274 # We need some generic definitions.
 275 include $(srctree)/scripts/Kbuild.include
 276
 277 # Make variables (CC, etc...)
 278
 279 AS              = $(CROSS_COMPILE)as
 280 LD              = $(CROSS_COMPILE)ld
 281 CC              = $(CROSS_COMPILE)gcc
 282 CPP             = $(CC) -E
 283 AR              = $(CROSS_COMPILE)ar
 284 NM              = $(CROSS_COMPILE)nm
 285 STRIP           = $(CROSS_COMPILE)strip
 286 OBJCOPY         = $(CROSS_COMPILE)objcopy
 287 OBJDUMP         = $(CROSS_COMPILE)objdump
 288 AWK             = awk
 289 GENKSYMS        = scripts/genksyms/genksyms
 290 DEPMOD          = /sbin/depmod
 291 KALLSYMS        = scripts/kallsyms
 292 PERL            = perl
 293 CHECK           = sparse
 294
 295 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 296 MODFLAGS        = -DMODULE
 297 CFLAGS_MODULE   = $(MODFLAGS)
 298 AFLAGS_MODULE   = $(MODFLAGS)
 299 LDFLAGS_MODULE  = -r
 300 CFLAGS_KERNEL   =
 301 AFLAGS_KERNEL   =
 302
 303
 304 # Use LINUXINCLUDE when you must reference the include/ directory.
 305 # Needed to be compatible with the O= option
 306 LINUXINCLUDE    := -Iinclude \
 307                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 308                    -include include/linux/autoconf.h
 309
 310 CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)
 311
 312 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 313                    -fno-strict-aliasing -fno-common \
 314                    -Werror-implicit-function-declaration \
 315                    -Wno-format-security \
 316                    -fno-delete-null-pointer-checks
 317 AFLAGS          := -D__ASSEMBLY__
 318
 319
 320 # Broadcom source tree
 321 TOPDIR  := $(shell /bin/pwd)
 322 SRCBASE ?= $(TOPDIR)/../..
 323 export SRCBASE
 324 CFLAGS += -I$(SRCBASE)/include
 325 AFLAGS += -I$(SRCBASE)/include
 326 ASFLAGS += -I$(SRCBASE)/include
 327
 328 ifeq ("$(CONFIG_WL_EMULATOR)","y")
 329 CFLAGS += -DBCM_WL_EMULATOR -DBCMPERFSTATS
 330 endif #CONFIG_WL_EMULATOR
 331
 332 CFLAGS += -DBCMDRIVER -Dlinux
 333
 334 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 335 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 336 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 337
 338 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 339 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 340 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 341 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 342
 343 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 344 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 345 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 346
 347 # When compiling out-of-tree modules, put MODVERDIR in the module
 348 # tree rather than in the kernel tree. The kernel tree might
 349 # even be read-only.
 350 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 351
 352 # Files to ignore in find ... statements
 353
 354 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
 355 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 356
 357 # ===========================================================================
 358 # Rules shared between *config targets and build targets
 359
 360 # Basic helpers built in scripts/
 361 PHONY += scripts_basic
 362 scripts_basic:
 363         $(Q)$(MAKE) $(build)=scripts/basic
 364
 365 # To avoid any implicit rule to kick in, define an empty command.
 366 scripts/basic/%: scripts_basic ;
 367
 368 PHONY += outputmakefile
 369 # outputmakefile generates a Makefile in the output directory, if using a
 370 # separate output directory. This allows convenient use of make in the
 371 # output directory.
 372 outputmakefile:
 373 ifneq ($(KBUILD_SRC),)
 374         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 375             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 376 endif
 377
 378 # To make sure we do not include .config for any of the *config targets
 379 # catch them early, and hand them over to scripts/kconfig/Makefile
 380 # It is allowed to specify more targets when calling make, including
 381 # mixing *config targets and build targets.
 382 # For example 'make oldconfig all'.
 383 # Detect when mixed targets is specified, and make a second invocation
 384 # of make so .config is not included in this case either (for *config).
 385
 386 no-dot-config-targets := clean mrproper distclean \
 387                          cscope TAGS tags help %docs check% \
 388                          include/linux/version.h headers_% \
 389                          kernelrelease kernelversion
 390
 391 config-targets := 0
 392 mixed-targets  := 0
 393 dot-config     := 1
 394
 395 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 396         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 397                 dot-config := 0
 398         endif
 399 endif
 400
 401 ifeq ($(KBUILD_EXTMOD),)
 402         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 403                 config-targets := 1
 404                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 405                         mixed-targets := 1
 406                 endif
 407         endif
 408 endif
 409
 410 ifeq ($(mixed-targets),1)
 411 # ===========================================================================
 412 # We're called with mixed targets (*config and build targets).
 413 # Handle them one by one.
 414
 415 %:: FORCE
 416         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 417
 418 else
 419 ifeq ($(config-targets),1)
 420 # ===========================================================================
 421 # *config targets only - make sure prerequisites are updated, and descend
 422 # in scripts/kconfig to make the *config target
 423
 424 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 425 # KBUILD_DEFCONFIG may point out an alternative default configuration
 426 # used for 'make defconfig'
 427 include $(srctree)/arch/$(ARCH)/Makefile
 428 export KBUILD_DEFCONFIG
 429
 430 config: scripts_basic outputmakefile FORCE
 431         $(Q)mkdir -p include/linux include/config
 432         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 433
 434 %config: scripts_basic outputmakefile FORCE
 435         $(Q)mkdir -p include/linux include/config
 436         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 437
 438 else
 439 # ===========================================================================
 440 # Build targets only - this includes vmlinux, arch specific targets, clean
 441 # targets and others. In general all targets except *config targets.
 442
 443 ifeq ($(KBUILD_EXTMOD),)
 444 # Additional helpers built in scripts/
 445 # Carefully list dependencies so we do not try to build scripts twice
 446 # in parallel
 447 PHONY += scripts
 448 scripts: scripts_basic include/config/auto.conf
 449         $(Q)$(MAKE) $(build)=$(@)
 450
 451 # Objects we will link into vmlinux / subdirs we need to visit
 452 init-y          := init/
 453 drivers-y       := drivers/ sound/
 454 net-y           := net/
 455 libs-y          := lib/
 456 core-y          := usr/
 457 endif # KBUILD_EXTMOD
 458
 459 ifeq ($(dot-config),1)
 460 # Read in config
 461 -include include/config/auto.conf
 462
 463 ifeq ($(KBUILD_EXTMOD),)
 464 # Read in dependencies to all Kconfig* files, make sure to run
 465 # oldconfig if changes are detected.
 466 -include include/config/auto.conf.cmd
 467
 468 # To avoid any implicit rule to kick in, define an empty command
 469 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 470
 471 # If .config is newer than include/config/auto.conf, someone tinkered
 472 # with it and forgot to run make oldconfig.
 473 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 474 # we execute the config step to be sure to catch updated Kconfig files
 475 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 476         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 477 else
 478 # external modules needs include/linux/autoconf.h and include/config/auto.conf
 479 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 480 PHONY += include/config/auto.conf
 481
 482 include/config/auto.conf:
 483         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 484         echo;                                                           \
 485         echo "  ERROR: Kernel configuration is invalid.";               \
 486         echo "         include/linux/autoconf.h or $@ are missing.";    \
 487         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 488         echo;                                                           \
 489         /bin/false)
 490
 491 endif # KBUILD_EXTMOD
 492
 493 else
 494 # Dummy target needed, because used as prerequisite
 495 include/config/auto.conf: ;
 496 endif # $(dot-config)
 497
 498 # The all: target is the default when no target is given on the
 499 # command line.
 500 # This allow a user to issue only 'make' to build a kernel including modules
 501 # Defaults vmlinux but it is usually overridden in the arch makefile
 502 all: vmlinux
 503
 504 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 505 CFLAGS          += -Os
 506 else
 507 CFLAGS          += -O2
 508 endif
 509
 510 include $(srctree)/arch/$(ARCH)/Makefile
 511
 512 ifdef CONFIG_FRAME_POINTER
 513 CFLAGS          += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
 514 else
 515 CFLAGS          += -fomit-frame-pointer
 516 endif
 517
 518 ifdef CONFIG_DEBUG_INFO
 519 CFLAGS          += -g
 520 endif
 521
 522 # Force gcc to behave correct even for buggy distributions
 523 CFLAGS          += $(call cc-option, -fno-stack-protector)
 524
 525 # arch Makefile may override CC so keep this after arch Makefile is included
 526 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 527 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 528
 529 # improve gcc optimization
 530 CFLAGS += $(call cc-option,-funit-at-a-time,)
 531
 532 # warn about C99 declaration after statement
 533 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 534
 535 # disable pointer signed / unsigned warnings in gcc 4.0
 536 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 537
 538 # disable invalid "can't wrap" optimizations for signed / pointers
 539 CFLAGS  += $(call cc-option,-fno-strict-overflow)
 540
 541 # revert to pre-gcc-4.4 behaviour of .eh_frame
 542 CFLAGS  += $(call cc-option,-fno-dwarf2-cfi-asm)
 543
 544 ifdef CONFIG_BCM_CTF
 545 CFLAGS += -DHNDCTF -DCTFPOOL
 546 endif
 547
 548 # Default kernel image to build when no specific target is given.
 549 # KBUILD_IMAGE may be overruled on the command line or
 550 # set in the environment
 551 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 552 # this default value
 553 export KBUILD_IMAGE ?= vmlinux
 554
 555 #
 556 # INSTALL_PATH specifies where to place the updated kernel and system map
 557 # images. Default is /boot, but you can set it to other values
 558 export  INSTALL_PATH ?= /boot
 559
 560 #
 561 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 562 # relocations required by build roots.  This is not defined in the
 563 # makefile but the argument can be passed to make if needed.
 564 #
 565
 566 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 567 export MODLIB
 568
 569 #
 570 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 571 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 572 #  the default option --strip-debug will be used.  Otherwise,
 573 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 574
 575 INSTALL_MOD_STRIP = 1
 576
 577 ifdef INSTALL_MOD_STRIP
 578 ifeq ($(INSTALL_MOD_STRIP),1)
 579 mod_strip_cmd = $(STRIP) --strip-debug
 580 else
 581 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 582 endif # INSTALL_MOD_STRIP=1
 583 else
 584 mod_strip_cmd = true
 585 endif # INSTALL_MOD_STRIP
 586 export mod_strip_cmd
 587
 588
 589 ifeq ($(KBUILD_EXTMOD),)
 590 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 591
 592 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 593                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 594                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 595
 596 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 597                      $(init-n) $(init-) \
 598                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 599                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 600
 601 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 602 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 603 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 604 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 605 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 606 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 607 libs-y          := $(libs-y1) $(libs-y2)
 608
 609 # Build vmlinux
 610 # ---------------------------------------------------------------------------
 611 # vmlinux is built from the objects selected by $(vmlinux-init) and
 612 # $(vmlinux-main). Most are built-in.o files from top-level directories
 613 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 614 # Ordering when linking is important, and $(vmlinux-init) must be first.
 615 #
 616 # vmlinux
 617 #   ^
 618 #   |
 619 #   +-< $(vmlinux-init)
 620 #   |   +--< init/version.o + more
 621 #   |
 622 #   +--< $(vmlinux-main)
 623 #   |    +--< driver/built-in.o mm/built-in.o + more
 624 #   |
 625 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 626 #
 627 # vmlinux version (uname -v) cannot be updated during normal
 628 # descending-into-subdirs phase since we do not yet know if we need to
 629 # update vmlinux.
 630 # Therefore this step is delayed until just before final link of vmlinux -
 631 # except in the kallsyms case where it is done just before adding the
 632 # symbols to the kernel.
 633 #
 634 # System.map is generated to document addresses of all kernel symbols
 635
 636 vmlinux-init := $(head-y) $(init-y)
 637 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 638 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 639 vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
 640 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 641
 642 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 643 # May be overridden by arch/$(ARCH)/Makefile
 644 quiet_cmd_vmlinux__ ?= LD      $@
 645       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 646       -T $(vmlinux-lds) $(vmlinux-init)                          \
 647       --start-group $(vmlinux-main) --end-group                  \
 648       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 649
 650 # Generate new vmlinux version
 651 quiet_cmd_vmlinux_version = GEN     .version
 652       cmd_vmlinux_version = set -e;                     \
 653         if [ ! -r .version ]; then                      \
 654           rm -f .version;                               \
 655           echo 1 >.version;                             \
 656         else                                            \
 657           mv .version .old_version;                     \
 658           expr 0$$(cat .old_version) + 1 >.version;     \
 659         fi;                                             \
 660         $(MAKE) $(build)=init
 661
 662 # Generate System.map
 663 quiet_cmd_sysmap = SYSMAP
 664       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 665
 666 # Link of vmlinux
 667 # If CONFIG_KALLSYMS is set .version is already updated
 668 # Generate System.map and verify that the content is consistent
 669 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 670 # First command is ':' to allow us to use + in front of the rule
 671 define rule_vmlinux__
 672         :
 673         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 674
 675         $(call cmd,vmlinux__)
 676         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 677
 678         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 679           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 680         $(cmd_sysmap) $@ System.map;                                         \
 681         if [ $$? -ne 0 ]; then                                               \
 682                 rm -f $@;                                                    \
 683                 /bin/false;                                                  \
 684         fi;
 685         $(verify_kallsyms)
 686 endef
 687
 688
 689 ifdef CONFIG_KALLSYMS
 690 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 691 # It's a three stage process:
 692 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 693 #   empty
 694 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 695 #   the right size - vmlinux version (uname -v) is updated during this step
 696 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 697 #   but due to the added section, some addresses have shifted.
 698 #   From here, we generate a correct .tmp_kallsyms2.o
 699 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 700 # o Verify that the System.map from vmlinux matches the map from
 701 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 702 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 703 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 704 #   temporary bypass to allow the kernel to be built while the
 705 #   maintainers work out what went wrong with kallsyms.
 706
 707 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 708 last_kallsyms := 3
 709 else
 710 last_kallsyms := 2
 711 endif
 712
 713 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 714
 715 define verify_kallsyms
 716         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 717           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 718           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 719         $(Q)cmp -s System.map .tmp_System.map ||                             \
 720                 (echo Inconsistent kallsyms data;                            \
 721                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 722                  rm .tmp_kallsyms* ; /bin/false )
 723 endef
 724
 725 # Update vmlinux version before link
 726 # Use + in front of this rule to silent warning about make -j1
 727 # First command is ':' to allow us to use + in front of this rule
 728 cmd_ksym_ld = $(cmd_vmlinux__)
 729 define rule_ksym_ld
 730         :
 731         +$(call cmd,vmlinux_version)
 732         $(call cmd,vmlinux__)
 733         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 734 endef
 735
 736 # Generate .S file with all kernel symbols
 737 quiet_cmd_kallsyms = KSYM    $@
 738       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 739                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 740
 741 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 742         $(call if_changed_dep,as_o_S)
 743
 744 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 745         $(call cmd,kallsyms)
 746
 747 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 748 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 749         $(call if_changed_rule,ksym_ld)
 750
 751 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 752         $(call if_changed,vmlinux__)
 753
 754 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 755         $(call if_changed,vmlinux__)
 756
 757 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 758 $(KALLSYMS): scripts ;
 759
 760 # Generate some data for debugging strange kallsyms problems
 761 debug_kallsyms: .tmp_map$(last_kallsyms)
 762
 763 .tmp_map%: .tmp_vmlinux% FORCE
 764         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 765
 766 .tmp_map3: .tmp_map2
 767
 768 .tmp_map2: .tmp_map1
 769
 770 endif # ifdef CONFIG_KALLSYMS
 771
 772 # vmlinux image - including updated kernel symbols
 773 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 774 ifdef CONFIG_HEADERS_CHECK
 775         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 776 endif
 777         $(call if_changed_rule,vmlinux__)
 778         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 779         $(Q)rm -f .old_version
 780
 781 # The actual objects are generated when descending,
 782 # make sure no implicit rule kicks in
 783 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 784
 785 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 786 # Preset locale variables to speed up the build process. Limit locale
 787 # tweaks to this spot to avoid wrong language settings when running
 788 # make menuconfig etc.
 789 # Error messages still appears in the original language
 790
 791 PHONY += $(vmlinux-dirs)
 792 $(vmlinux-dirs): prepare scripts
 793         $(Q)$(MAKE) $(build)=$@
 794
 795 # Build the kernel release string
 796 #
 797 # The KERNELRELEASE value built here is stored in the file
 798 # include/config/kernel.release, and is used when executing several
 799 # make targets, such as "make install" or "make modules_install."
 800 #
 801 # The eventual kernel release string consists of the following fields,
 802 # shown in a hierarchical format to show how smaller parts are concatenated
 803 # to form the larger and final value, with values coming from places like
 804 # the Makefile, kernel config options, make command line options and/or
 805 # SCM tag information.
 806 #
 807 #       $(KERNELVERSION)
 808 #         $(VERSION)                    eg, 2
 809 #         $(PATCHLEVEL)                 eg, 6
 810 #         $(SUBLEVEL)                   eg, 18
 811 #         $(EXTRAVERSION)               eg, -rc6
 812 #       $(localver-full)
 813 #         $(localver)
 814 #           localversion*               (files without backups, containing '~')
 815 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 816 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 817 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 818 #           $(LOCALVERSION)             (from make command line if provided)
 819 #
 820 #  Note how the final $(localver-auto) string is included *only* if the
 821 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 822 # moment, only git is supported but other SCMs can edit the script
 823 # scripts/setlocalversion and add the appropriate checks as needed.
 824
 825 pattern = ".*/localversion[^~]*"
 826 string  = $(shell cat /dev/null \
 827            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 828
 829 localver = $(subst $(space),, $(string) \
 830                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 831
 832 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 833 # and if the SCM is know a tag from the SCM is appended.
 834 # The appended tag is determined by the SCM used.
 835 #
 836 # Currently, only git is supported.
 837 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 838 # checks as needed.
 839 ifdef CONFIG_LOCALVERSION_AUTO
 840         _localver-auto = $(shell $(CONFIG_SHELL) \
 841                           $(srctree)/scripts/setlocalversion $(srctree))
 842         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 843 endif
 844
 845 localver-full = $(localver)$(localver-auto)
 846
 847 include/linux/config.h:
 848         $(Q)ln -sfn $(srctree)/include/linux/autoconf.h include/linux/config.h
 849
 850 # Store (new) KERNELRELASE string in include/config/kernel.release
 851 kernelrelease = $(KERNELVERSION)$(localver-full)
 852 include/config/kernel.release: include/config/auto.conf include/linux/config.h FORCE
 853         $(Q)rm -f $@
 854         $(Q)echo $(kernelrelease) > $@
 855
 856
 857 # Things we need to do before we recursively start building the kernel
 858 # or the modules are listed in "prepare".
 859 # A multi level approach is used. prepareN is processed before prepareN-1.
 860 # archprepare is used in arch Makefiles and when processed asm symlink,
 861 # version.h and scripts_basic is processed / created.
 862
 863 # Listed in dependency order
 864 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 865
 866 # prepare3 is used to check if we are building in a separate output directory,
 867 # and if so do:
 868 # 1) Check that make has not been executed in the kernel src $(srctree)
 869 # 2) Create the include2 directory, used for the second asm symlink
 870 prepare3: include/config/kernel.release
 871 ifneq ($(KBUILD_SRC),)
 872         @echo '  Using $(srctree) as source for kernel'
 873         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 874                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 875                 echo "  in the '$(srctree)' directory.";\
 876                 /bin/false; \
 877         fi;
 878         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 879         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 880 endif
 881
 882 # prepare2 creates a makefile if using a separate output directory
 883 prepare2: prepare3 outputmakefile
 884
 885 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 886                    include/asm include/config/auto.conf
 887 ifneq ($(KBUILD_MODULES),)
 888         $(Q)mkdir -p $(MODVERDIR)
 889         $(Q)rm -f $(MODVERDIR)/*
 890 endif
 891
 892 archprepare: prepare1 scripts_basic
 893
 894 prepare0: archprepare FORCE
 895         $(Q)$(MAKE) $(build)=.
 896         $(Q)$(MAKE) $(build)=. missing-syscalls
 897
 898 # All the preparing..
 899 prepare: prepare0
 900
 901 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 902 # done in arch/$(ARCH)/kernel/Makefile
 903
 904 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 905
 906 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 907 # hard to detect, but I suppose "make mrproper" is a good idea
 908 # before switching between archs anyway.
 909
 910 include/asm:
 911         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 912         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 913         @ln -fsn asm-$(ARCH) $@
 914
 915 # Generate some files
 916 # ---------------------------------------------------------------------------
 917
 918 # KERNELRELEASE can change from a few different places, meaning version.h
 919 # needs to be updated, so this check is forced on all builds
 920
 921 uts_len := 64
 922 define filechk_utsrelease.h
 923         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 924           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 925           exit 1;                                                         \
 926         fi;                                                               \
 927         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 928 endef
 929
 930 define filechk_version.h
 931         (echo \#define LINUX_VERSION_CODE $(shell                             \
 932         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 933         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 934 endef
 935
 936 include/linux/version.h: $(srctree)/Makefile FORCE
 937         $(call filechk,version.h)
 938
 939 include/linux/utsrelease.h: include/config/kernel.release FORCE
 940         $(call filechk,utsrelease.h)
 941
 942 # ---------------------------------------------------------------------------
 943
 944 PHONY += depend dep
 945 depend dep:
 946         @echo '*** Warning: make $@ is unnecessary now.'
 947
 948 # ---------------------------------------------------------------------------
 949 # Kernel headers
 950 INSTALL_HDR_PATH=$(objtree)/usr
 951 export INSTALL_HDR_PATH
 952
 953 HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
 954
 955 PHONY += headers_install_all
 956 headers_install_all: include/linux/version.h scripts_basic FORCE
 957         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 958         $(Q)for arch in $(HDRARCHES); do \
 959          $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
 960          done
 961
 962 PHONY += headers_install
 963 headers_install: include/linux/version.h scripts_basic FORCE
 964         @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
 965           echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
 966           exit 1 ; fi
 967         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 968         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
 969
 970 PHONY += headers_check_all
 971 headers_check_all: headers_install_all
 972         $(Q)for arch in $(HDRARCHES); do \
 973          $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
 974          done
 975
 976 PHONY += headers_check
 977 headers_check: headers_install
 978         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
 979
 980 # ---------------------------------------------------------------------------
 981 # Modules
 982
 983 ifdef CONFIG_MODULES
 984
 985 # By default, build modules as well
 986
 987 all: modules
 988
 989 #       Build modules
 990
 991 PHONY += modules
 992 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
 993         @echo '  Building modules, stage 2.';
 994         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 995
 996
 997 # Target to prepare building external modules
 998 PHONY += modules_prepare
 999 modules_prepare: prepare scripts
1000
1001 # Target to install modules
1002 PHONY += modules_install
1003 modules_install: _modinst_ _modinst_post
1004
1005 PHONY += _modinst_
1006 _modinst_:
1007         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1008                 echo "Warning: you may need to install module-init-tools"; \
1009                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1010                 sleep 1; \
1011         fi
1012         @rm -rf $(MODLIB)/kernel
1013         @rm -f $(MODLIB)/source
1014         @mkdir -p $(MODLIB)/kernel
1015         @ln -s $(srctree) $(MODLIB)/source
1016         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1017                 rm -f $(MODLIB)/build ; \
1018                 ln -s $(objtree) $(MODLIB)/build ; \
1019         fi
1020         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1021
1022 # If System.map exists, run depmod.  This deliberately does not have a
1023 # dependency on System.map since that would run the dependency tree on
1024 # vmlinux.  This depmod is only for convenience to give the initial
1025 # boot a modules.dep even before / is mounted read-write.  However the
1026 # boot script depmod is the master version.
1027 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
1028 depmod_opts     :=
1029 else
1030 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
1031 endif
1032 PHONY += _modinst_post
1033 _modinst_post: _modinst_
1034         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1035
1036 else # CONFIG_MODULES
1037
1038 # Modules not configured
1039 # ---------------------------------------------------------------------------
1040
1041 modules modules_install: FORCE
1042         @echo
1043         @echo "The present kernel configuration has modules disabled."
1044         @echo "Type 'make config' and enable loadable module support."
1045         @echo "Then build a kernel with module support enabled."
1046         @echo
1047         @exit 1
1048
1049 endif # CONFIG_MODULES
1050
1051 ###
1052 # Cleaning is done on three levels.
1053 # make clean     Delete most generated files
1054 #                Leave enough to build external modules
1055 # make mrproper  Delete the current configuration, and all generated files
1056 # make distclean Remove editor backup files, patch leftover files and the like
1057
1058 # Directories & files removed with 'make clean'
1059 CLEAN_DIRS  += $(MODVERDIR)
1060 CLEAN_FILES +=  vmlinux System.map \
1061                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1062
1063 # Directories & files removed with 'make mrproper'
1064 MRPROPER_DIRS  += include/config include2 usr/include
1065 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1066                   include/linux/autoconf.h include/linux/version.h      \
1067                   include/linux/utsrelease.h                            \
1068                   Module.symvers tags TAGS cscope*
1069
1070 # clean - Delete most, but leave enough to build external modules
1071 #
1072 clean: rm-dirs  := $(CLEAN_DIRS)
1073 clean: rm-files := $(CLEAN_FILES)
1074 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1075
1076 PHONY += $(clean-dirs) clean archclean
1077 $(clean-dirs):
1078         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1079
1080 clean: archclean $(clean-dirs)
1081         $(call cmd,rmdirs)
1082         $(call cmd,rmfiles)
1083         @find . $(RCS_FIND_IGNORE) \
1084                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1085                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1086                 -o -name '*.symtypes' \) \
1087                 -type f -print | xargs rm -f
1088
1089 # mrproper - Delete all generated files, including .config
1090 #
1091 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1092 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1093 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1094
1095 PHONY += $(mrproper-dirs) mrproper archmrproper
1096 $(mrproper-dirs):
1097         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1098
1099 mrproper: clean archmrproper $(mrproper-dirs)
1100         $(call cmd,rmdirs)
1101         $(call cmd,rmfiles)
1102
1103 # distclean
1104 #
1105 PHONY += distclean
1106
1107 distclean: mrproper
1108         @find $(srctree) $(RCS_FIND_IGNORE) \
1109                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1110                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1111                 -o -name '.*.rej' -o -size 0 \
1112                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1113                 -type f -print | xargs rm -f
1114
1115
1116 # Packaging of the kernel to various formats
1117 # ---------------------------------------------------------------------------
1118 # rpm target kept for backward compatibility
1119 package-dir     := $(srctree)/scripts/package
1120
1121 %pkg: include/config/kernel.release FORCE
1122         $(Q)$(MAKE) $(build)=$(package-dir) $@
1123 rpm: include/config/kernel.release FORCE
1124         $(Q)$(MAKE) $(build)=$(package-dir) $@
1125
1126
1127 # Brief documentation of the typical targets used
1128 # ---------------------------------------------------------------------------
1129
1130 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1131 boards := $(notdir $(boards))
1132
1133 help:
1134         @echo  'Cleaning targets:'
1135         @echo  '  clean           - Remove most generated files but keep the config and'
1136         @echo  '                    enough build support to build external modules'
1137         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1138         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1139         @echo  ''
1140         @echo  'Configuration targets:'
1141         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1142         @echo  ''
1143         @echo  'Other generic targets:'
1144         @echo  '  all             - Build all targets marked with [*]'
1145         @echo  '* vmlinux         - Build the bare kernel'
1146         @echo  '* modules         - Build all modules'
1147         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1148         @echo  '  dir/            - Build all files in dir and below'
1149         @echo  '  dir/file.[ois]  - Build specified target only'
1150         @echo  '  dir/file.ko     - Build module including final link'
1151         @echo  '  rpm             - Build a kernel as an RPM package'
1152         @echo  '  tags/TAGS       - Generate tags file for editors'
1153         @echo  '  cscope          - Generate cscope index'
1154         @echo  '  kernelrelease   - Output the release version string'
1155         @echo  '  kernelversion   - Output the version stored in Makefile'
1156         @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1157          echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1158          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1159          fi
1160         @echo  ''
1161         @echo  'Static analysers'
1162         @echo  '  checkstack      - Generate a list of stack hogs'
1163         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1164         @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1165          echo  '  headers_check   - Sanity check on exported headers'; \
1166          fi
1167         @echo  ''
1168         @echo  'Kernel packaging:'
1169         @$(MAKE) $(build)=$(package-dir) help
1170         @echo  ''
1171         @echo  'Documentation targets:'
1172         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1173         @echo  ''
1174         @echo  'Architecture specific targets ($(ARCH)):'
1175         @$(if $(archhelp),$(archhelp),\
1176                 echo '  No architecture specific help defined for $(ARCH)')
1177         @echo  ''
1178         @$(if $(boards), \
1179                 $(foreach b, $(boards), \
1180                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1181                 echo '')
1182
1183         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1184         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1185         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1186         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1187         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1188         @echo  ''
1189         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1190         @echo  'For further info see the ./README file'
1191
1192
1193 # Documentation targets
1194 # ---------------------------------------------------------------------------
1195 %docs: scripts_basic FORCE
1196         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1197
1198 else # KBUILD_EXTMOD
1199
1200 ###
1201 # External module support.
1202 # When building external modules the kernel used as basis is considered
1203 # read-only, and no consistency checks are made and the make
1204 # system is not used on the basis kernel. If updates are required
1205 # in the basis kernel ordinary make commands (without M=...) must
1206 # be used.
1207 #
1208 # The following are the only valid targets when building external
1209 # modules.
1210 # make M=dir clean     Delete all automatically generated files
1211 # make M=dir modules   Make all modules in specified dir
1212 # make M=dir           Same as 'make M=dir modules'
1213 # make M=dir modules_install
1214 #                      Install the modules built in the module directory
1215 #                      Assumes install directory is already created
1216
1217 # We are always building modules
1218 KBUILD_MODULES := 1
1219 PHONY += crmodverdir
1220 crmodverdir:
1221         $(Q)mkdir -p $(MODVERDIR)
1222         $(Q)rm -f $(MODVERDIR)/*
1223
1224 PHONY += $(objtree)/Module.symvers
1225 $(objtree)/Module.symvers:
1226         @test -e $(objtree)/Module.symvers || ( \
1227         echo; \
1228         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1229         echo "           is missing; modules will have no dependencies and modversions."; \
1230         echo )
1231
1232 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1233 PHONY += $(module-dirs) modules
1234 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1235         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1236
1237 modules: $(module-dirs)
1238         @echo '  Building modules, stage 2.';
1239         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1240
1241 PHONY += modules_install
1242 modules_install: _emodinst_ _emodinst_post
1243
1244 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1245 PHONY += _emodinst_
1246 _emodinst_:
1247         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1248         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1249
1250 # Run depmod only is we have System.map and depmod is executable
1251 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1252       cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1253                       $(DEPMOD) -ae -F System.map             \
1254                       $(if $(strip $(INSTALL_MOD_PATH)),      \
1255                       -b $(INSTALL_MOD_PATH) -r)              \
1256                       $(KERNELRELEASE);                       \
1257                    fi
1258
1259 PHONY += _emodinst_post
1260 _emodinst_post: _emodinst_
1261         $(call cmd,depmod)
1262
1263 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1264
1265 PHONY += $(clean-dirs) clean
1266 $(clean-dirs):
1267         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1268
1269 clean:  rm-dirs := $(MODVERDIR)
1270 clean: $(clean-dirs)
1271         $(call cmd,rmdirs)
1272         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1273                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1274                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1275                 -type f -print | xargs rm -f
1276
1277 help:
1278         @echo  '  Building external modules.'
1279         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1280         @echo  ''
1281         @echo  '  modules         - default target, build the module(s)'
1282         @echo  '  modules_install - install the module'
1283         @echo  '  clean           - remove generated files in module directory only'
1284         @echo  ''
1285
1286 # Dummies...
1287 PHONY += prepare scripts
1288 prepare: ;
1289 scripts: ;
1290 endif # KBUILD_EXTMOD
1291
1292 # Generate tags for editors
1293 # ---------------------------------------------------------------------------
1294
1295 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1296 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1297 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1298
1299 ifeq ($(src),$(obj))
1300 __srctree =
1301 else
1302 __srctree = $(srctree)/
1303 endif
1304
1305 ifeq ($(ALLSOURCE_ARCHS),)
1306 ifeq ($(ARCH),um)
1307 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1308 else
1309 ALLINCLUDE_ARCHS := $(ARCH)
1310 endif
1311 else
1312 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1313 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1314 endif
1315
1316 ALLSOURCE_ARCHS := $(ARCH)
1317
1318 define find-sources
1319         ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
1320                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1321                     -name $1 -print; \
1322           done ; \
1323           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1324                -name $1 -print; \
1325           find $(__srctree)include $(RCS_FIND_IGNORE) \
1326                \( -name config -o -name 'asm-*' \) -prune \
1327                -o -name $1 -print; \
1328           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1329                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1330                     -name $1 -print; \
1331           done ; \
1332           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1333                -name $1 -print; \
1334           find $(__srctree) $(RCS_FIND_IGNORE) \
1335                \( -name include -o -name arch \) -prune -o \
1336                -name $1 -print; \
1337           )
1338 endef
1339
1340 define all-sources
1341         $(call find-sources,'*.[chS]')
1342 endef
1343 define all-kconfigs
1344         $(call find-sources,'Kconfig*')
1345 endef
1346 define all-defconfigs
1347         $(call find-sources,'defconfig')
1348 endef
1349
1350 define xtags
1351         if $1 --version 2>&1 | grep -iq exuberant; then \
1352             $(all-sources) | xargs $1 -a \
1353                 -I __initdata,__exitdata,__acquires,__releases \
1354                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1355                 --extra=+f --c-kinds=+px \
1356                 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1357             $(all-kconfigs) | xargs $1 -a \
1358                 --langdef=kconfig \
1359                 --language-force=kconfig \
1360                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1361             $(all-defconfigs) | xargs -r $1 -a \
1362                 --langdef=dotconfig \
1363                 --language-force=dotconfig \
1364                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1365         elif $1 --version 2>&1 | grep -iq emacs; then \
1366             $(all-sources) | xargs $1 -a; \
1367             $(all-kconfigs) | xargs $1 -a \
1368                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1369             $(all-defconfigs) | xargs -r $1 -a \
1370                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1371         else \
1372             $(all-sources) | xargs $1 -a; \
1373         fi
1374 endef
1375
1376 quiet_cmd_cscope-file = FILELST cscope.files
1377       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1378
1379 quiet_cmd_cscope = MAKE    cscope.out
1380       cmd_cscope = cscope -b
1381
1382 cscope: FORCE
1383         $(call cmd,cscope-file)
1384         $(call cmd,cscope)
1385
1386 quiet_cmd_TAGS = MAKE   $@
1387 define cmd_TAGS
1388         rm -f $@; \
1389         $(call xtags,etags)
1390 endef
1391
1392 TAGS: FORCE
1393         $(call cmd,TAGS)
1394
1395 quiet_cmd_tags = MAKE   $@
1396 define cmd_tags
1397         rm -f $@; \
1398         $(call xtags,ctags)
1399 endef
1400
1401 tags: FORCE
1402         $(call cmd,tags)
1403
1404
1405 # Scripts to check various things for consistency
1406 # ---------------------------------------------------------------------------
1407
1408 includecheck:
1409         find * $(RCS_FIND_IGNORE) \
1410                 -name '*.[hcS]' -type f -print | sort \
1411                 | xargs $(PERL) -w scripts/checkincludes.pl
1412
1413 versioncheck:
1414         find * $(RCS_FIND_IGNORE) \
1415                 -name '*.[hcS]' -type f -print | sort \
1416                 | xargs $(PERL) -w scripts/checkversion.pl
1417
1418 namespacecheck:
1419         $(PERL) $(srctree)/scripts/namespace.pl
1420
1421 endif #ifeq ($(config-targets),1)
1422 endif #ifeq ($(mixed-targets),1)
1423
1424 PHONY += checkstack kernelrelease kernelversion
1425
1426 # UML needs a little special treatment here.  It wants to use the host
1427 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1428 # else wants $(ARCH), including people doing cross-builds, which means
1429 # that $(SUBARCH) doesn't work here.
1430 ifeq ($(ARCH), um)
1431 CHECKSTACK_ARCH := $(SUBARCH)
1432 else
1433 CHECKSTACK_ARCH := $(ARCH)
1434 endif
1435 checkstack:
1436         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1437         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1438
1439 kernelrelease:
1440         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1441         $(error kernelrelease not valid - run 'make prepare' to update it))
1442 kernelversion:
1443         @echo $(KERNELVERSION)
1444
1445 # Single targets
1446 # ---------------------------------------------------------------------------
1447 # Single targets are compatible with:
1448 # - build whith mixed source and output
1449 # - build with separate output dir 'make O=...'
1450 # - external modules
1451 #
1452 #  target-dir => where to store outputfile
1453 #  build-dir  => directory in kernel source tree to use
1454
1455 ifeq ($(KBUILD_EXTMOD),)
1456         build-dir  = $(patsubst %/,%,$(dir $@))
1457         target-dir = $(dir $@)
1458 else
1459         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1460         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1461         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1462 endif
1463
1464 %.s: %.c prepare scripts FORCE
1465         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1466 %.i: %.c prepare scripts FORCE
1467         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1468 %.o: %.c prepare scripts FORCE
1469         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1470 %.lst: %.c prepare scripts FORCE
1471         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1472 %.s: %.S prepare scripts FORCE
1473         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1474 %.o: %.S prepare scripts FORCE
1475         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1476 %.symtypes: %.c prepare scripts FORCE
1477         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1478
1479 # Modules
1480 /: prepare scripts FORCE
1481         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1482         $(build)=$(build-dir)
1483 %/: prepare scripts FORCE
1484         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1485         $(build)=$(build-dir)
1486 %.ko: prepare scripts FORCE
1487         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1488         $(build)=$(build-dir) $(@:.ko=.o)
1489         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1490
1491 # FIXME Should go into a make.lib or something
1492 # ===========================================================================
1493
1494 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1495       cmd_rmdirs = rm -rf $(rm-dirs)
1496
1497 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1498       cmd_rmfiles = rm -f $(rm-files)
1499
1500
1501 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1502           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1503           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1504
1505 quiet_cmd_as_o_S = AS      $@
1506 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1507
1508 # read all saved command lines
1509
1510 targets := $(wildcard $(sort $(targets)))
1511 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1512
1513 ifneq ($(cmd_files),)
1514   $(cmd_files): ;       # Do not try to update included dependency files
1515   include $(cmd_files)
1516 endif
1517
1518 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1519 # Usage:
1520 # $(Q)$(MAKE) $(clean)=dir
1521 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1522
1523 endif   # skip-makefile
1524
1525 PHONY += FORCE
1526 FORCE:
1527
1528 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1529 Makefile: ;
1530
1531 # Declare the contents of the .PHONY variable as phony.  We keep that
1532 # information in a variable se we can use it in if_changed and friends.
1533 .PHONY: $(PHONY)