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  += $(call cc-option,-fno-dwarf2-cfi-asm)
 543
 544 ifneq ($(CONFIG_BCM_CTF),)
 545 CFLAGS += -DHNDCTF
 546 ifneq ($(CONFIG_WL_USBAP),)
 547 CFLAGS += -DCTFPOOL_SPINLOCK
 548 else
 549 CFLAGS += -DCTFPOOL -DCTFMAP
 550 endif
 551 endif
 552
 553 ifdef CONFIG_PLC
 554 CFLAGS += -DPLC
 555 endif
 556
 557 # Default kernel image to build when no specific target is given.
 558 # KBUILD_IMAGE may be overruled on the command line or
 559 # set in the environment
 560 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 561 # this default value
 562 export KBUILD_IMAGE ?= vmlinux
 563
 564 #
 565 # INSTALL_PATH specifies where to place the updated kernel and system map
 566 # images. Default is /boot, but you can set it to other values
 567 export  INSTALL_PATH ?= /boot
 568
 569 #
 570 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 571 # relocations required by build roots.  This is not defined in the
 572 # makefile but the argument can be passed to make if needed.
 573 #
 574
 575 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 576 export MODLIB
 577
 578 #
 579 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 580 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 581 #  the default option --strip-debug will be used.  Otherwise,
 582 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 583
 584 INSTALL_MOD_STRIP = 1
 585
 586 ifdef INSTALL_MOD_STRIP
 587 ifeq ($(INSTALL_MOD_STRIP),1)
 588 mod_strip_cmd = $(STRIP) --strip-debug
 589 else
 590 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 591 endif # INSTALL_MOD_STRIP=1
 592 else
 593 mod_strip_cmd = true
 594 endif # INSTALL_MOD_STRIP
 595 export mod_strip_cmd
 596
 597
 598 ifeq ($(KBUILD_EXTMOD),)
 599 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 600
 601 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 602                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 603                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 604
 605 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 606                      $(init-n) $(init-) \
 607                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 608                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 609
 610 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 611 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 612 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 613 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 614 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 615 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 616 libs-y          := $(libs-y1) $(libs-y2)
 617
 618 # Build vmlinux
 619 # ---------------------------------------------------------------------------
 620 # vmlinux is built from the objects selected by $(vmlinux-init) and
 621 # $(vmlinux-main). Most are built-in.o files from top-level directories
 622 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 623 # Ordering when linking is important, and $(vmlinux-init) must be first.
 624 #
 625 # vmlinux
 626 #   ^
 627 #   |
 628 #   +-< $(vmlinux-init)
 629 #   |   +--< init/version.o + more
 630 #   |
 631 #   +--< $(vmlinux-main)
 632 #   |    +--< driver/built-in.o mm/built-in.o + more
 633 #   |
 634 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 635 #
 636 # vmlinux version (uname -v) cannot be updated during normal
 637 # descending-into-subdirs phase since we do not yet know if we need to
 638 # update vmlinux.
 639 # Therefore this step is delayed until just before final link of vmlinux -
 640 # except in the kallsyms case where it is done just before adding the
 641 # symbols to the kernel.
 642 #
 643 # System.map is generated to document addresses of all kernel symbols
 644
 645 vmlinux-init := $(head-y) $(init-y)
 646 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 647 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 648 vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
 649 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 650
 651 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 652 # May be overridden by arch/$(ARCH)/Makefile
 653 quiet_cmd_vmlinux__ ?= LD      $@
 654       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 655       -T $(vmlinux-lds) $(vmlinux-init)                          \
 656       --start-group $(vmlinux-main) --end-group                  \
 657       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 658
 659 # Generate new vmlinux version
 660 quiet_cmd_vmlinux_version = GEN     .version
 661       cmd_vmlinux_version = set -e;                     \
 662         if [ ! -r .version ]; then                      \
 663           rm -f .version;                               \
 664           echo 1 >.version;                             \
 665         else                                            \
 666           mv .version .old_version;                     \
 667           expr 0$$(cat .old_version) + 1 >.version;     \
 668         fi;                                             \
 669         $(MAKE) $(build)=init
 670
 671 # Generate System.map
 672 quiet_cmd_sysmap = SYSMAP
 673       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 674
 675 # Link of vmlinux
 676 # If CONFIG_KALLSYMS is set .version is already updated
 677 # Generate System.map and verify that the content is consistent
 678 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 679 # First command is ':' to allow us to use + in front of the rule
 680 define rule_vmlinux__
 681         :
 682         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 683
 684         $(call cmd,vmlinux__)
 685         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 686
 687         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 688           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 689         $(cmd_sysmap) $@ System.map;                                         \
 690         if [ $$? -ne 0 ]; then                                               \
 691                 rm -f $@;                                                    \
 692                 /bin/false;                                                  \
 693         fi;
 694         $(verify_kallsyms)
 695 endef
 696
 697
 698 ifdef CONFIG_KALLSYMS
 699 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 700 # It's a three stage process:
 701 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 702 #   empty
 703 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 704 #   the right size - vmlinux version (uname -v) is updated during this step
 705 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 706 #   but due to the added section, some addresses have shifted.
 707 #   From here, we generate a correct .tmp_kallsyms2.o
 708 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 709 # o Verify that the System.map from vmlinux matches the map from
 710 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 711 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 712 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 713 #   temporary bypass to allow the kernel to be built while the
 714 #   maintainers work out what went wrong with kallsyms.
 715
 716 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 717 last_kallsyms := 3
 718 else
 719 last_kallsyms := 2
 720 endif
 721
 722 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 723
 724 define verify_kallsyms
 725         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 726           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 727           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 728         $(Q)cmp -s System.map .tmp_System.map ||                             \
 729                 (echo Inconsistent kallsyms data;                            \
 730                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 731                  rm .tmp_kallsyms* ; /bin/false )
 732 endef
 733
 734 # Update vmlinux version before link
 735 # Use + in front of this rule to silent warning about make -j1
 736 # First command is ':' to allow us to use + in front of this rule
 737 cmd_ksym_ld = $(cmd_vmlinux__)
 738 define rule_ksym_ld
 739         :
 740         +$(call cmd,vmlinux_version)
 741         $(call cmd,vmlinux__)
 742         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 743 endef
 744
 745 # Generate .S file with all kernel symbols
 746 quiet_cmd_kallsyms = KSYM    $@
 747       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 748                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 749
 750 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 751         $(call if_changed_dep,as_o_S)
 752
 753 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 754         $(call cmd,kallsyms)
 755
 756 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 757 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 758         $(call if_changed_rule,ksym_ld)
 759
 760 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 761         $(call if_changed,vmlinux__)
 762
 763 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 764         $(call if_changed,vmlinux__)
 765
 766 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 767 $(KALLSYMS): scripts ;
 768
 769 # Generate some data for debugging strange kallsyms problems
 770 debug_kallsyms: .tmp_map$(last_kallsyms)
 771
 772 .tmp_map%: .tmp_vmlinux% FORCE
 773         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 774
 775 .tmp_map3: .tmp_map2
 776
 777 .tmp_map2: .tmp_map1
 778
 779 endif # ifdef CONFIG_KALLSYMS
 780
 781 # vmlinux image - including updated kernel symbols
 782 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 783 ifdef CONFIG_HEADERS_CHECK
 784         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 785 endif
 786         $(call if_changed_rule,vmlinux__)
 787         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 788         $(Q)rm -f .old_version
 789
 790 # The actual objects are generated when descending,
 791 # make sure no implicit rule kicks in
 792 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 793
 794 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 795 # Preset locale variables to speed up the build process. Limit locale
 796 # tweaks to this spot to avoid wrong language settings when running
 797 # make menuconfig etc.
 798 # Error messages still appears in the original language
 799
 800 PHONY += $(vmlinux-dirs)
 801 $(vmlinux-dirs): prepare scripts
 802         $(Q)$(MAKE) $(build)=$@
 803
 804 # Build the kernel release string
 805 #
 806 # The KERNELRELEASE value built here is stored in the file
 807 # include/config/kernel.release, and is used when executing several
 808 # make targets, such as "make install" or "make modules_install."
 809 #
 810 # The eventual kernel release string consists of the following fields,
 811 # shown in a hierarchical format to show how smaller parts are concatenated
 812 # to form the larger and final value, with values coming from places like
 813 # the Makefile, kernel config options, make command line options and/or
 814 # SCM tag information.
 815 #
 816 #       $(KERNELVERSION)
 817 #         $(VERSION)                    eg, 2
 818 #         $(PATCHLEVEL)                 eg, 6
 819 #         $(SUBLEVEL)                   eg, 18
 820 #         $(EXTRAVERSION)               eg, -rc6
 821 #       $(localver-full)
 822 #         $(localver)
 823 #           localversion*               (files without backups, containing '~')
 824 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 825 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 826 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 827 #           $(LOCALVERSION)             (from make command line if provided)
 828 #
 829 #  Note how the final $(localver-auto) string is included *only* if the
 830 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 831 # moment, only git is supported but other SCMs can edit the script
 832 # scripts/setlocalversion and add the appropriate checks as needed.
 833
 834 pattern = ".*/localversion[^~]*"
 835 string  = $(shell cat /dev/null \
 836            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 837
 838 localver = $(subst $(space),, $(string) \
 839                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 840
 841 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 842 # and if the SCM is know a tag from the SCM is appended.
 843 # The appended tag is determined by the SCM used.
 844 #
 845 # Currently, only git is supported.
 846 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 847 # checks as needed.
 848 ifdef CONFIG_LOCALVERSION_AUTO
 849         _localver-auto = $(shell $(CONFIG_SHELL) \
 850                           $(srctree)/scripts/setlocalversion $(srctree))
 851         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 852 endif
 853
 854 localver-full = $(localver)$(localver-auto)
 855
 856 include/linux/config.h:
 857         $(Q)ln -sfn $(srctree)/include/linux/autoconf.h include/linux/config.h
 858
 859 # Store (new) KERNELRELASE string in include/config/kernel.release
 860 kernelrelease = $(KERNELVERSION)$(localver-full)
 861 include/config/kernel.release: include/config/auto.conf include/linux/config.h FORCE
 862         $(Q)rm -f $@
 863         $(Q)echo $(kernelrelease) > $@
 864
 865
 866 # Things we need to do before we recursively start building the kernel
 867 # or the modules are listed in "prepare".
 868 # A multi level approach is used. prepareN is processed before prepareN-1.
 869 # archprepare is used in arch Makefiles and when processed asm symlink,
 870 # version.h and scripts_basic is processed / created.
 871
 872 # Listed in dependency order
 873 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 874
 875 # prepare3 is used to check if we are building in a separate output directory,
 876 # and if so do:
 877 # 1) Check that make has not been executed in the kernel src $(srctree)
 878 # 2) Create the include2 directory, used for the second asm symlink
 879 prepare3: include/config/kernel.release
 880 ifneq ($(KBUILD_SRC),)
 881         @echo '  Using $(srctree) as source for kernel'
 882         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 883                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 884                 echo "  in the '$(srctree)' directory.";\
 885                 /bin/false; \
 886         fi;
 887         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 888         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 889 endif
 890
 891 # prepare2 creates a makefile if using a separate output directory
 892 prepare2: prepare3 outputmakefile
 893
 894 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 895                    include/asm include/config/auto.conf
 896 ifneq ($(KBUILD_MODULES),)
 897         $(Q)mkdir -p $(MODVERDIR)
 898         $(Q)rm -f $(MODVERDIR)/*
 899 endif
 900
 901 archprepare: prepare1 scripts_basic
 902
 903 prepare0: archprepare FORCE
 904         $(Q)$(MAKE) $(build)=.
 905         $(Q)$(MAKE) $(build)=. missing-syscalls
 906
 907 # All the preparing..
 908 prepare: prepare0
 909
 910 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 911 # done in arch/$(ARCH)/kernel/Makefile
 912
 913 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 914
 915 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 916 # hard to detect, but I suppose "make mrproper" is a good idea
 917 # before switching between archs anyway.
 918
 919 include/asm:
 920         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 921         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 922         @ln -fsn asm-$(ARCH) $@
 923
 924 # Generate some files
 925 # ---------------------------------------------------------------------------
 926
 927 # KERNELRELEASE can change from a few different places, meaning version.h
 928 # needs to be updated, so this check is forced on all builds
 929
 930 uts_len := 64
 931 define filechk_utsrelease.h
 932         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 933           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 934           exit 1;                                                         \
 935         fi;                                                               \
 936         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 937 endef
 938
 939 define filechk_version.h
 940         (echo \#define LINUX_VERSION_CODE $(shell                             \
 941         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 942         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 943 endef
 944
 945 include/linux/version.h: $(srctree)/Makefile FORCE
 946         $(call filechk,version.h)
 947
 948 include/linux/utsrelease.h: include/config/kernel.release FORCE
 949         $(call filechk,utsrelease.h)
 950
 951 # ---------------------------------------------------------------------------
 952
 953 PHONY += depend dep
 954 depend dep:
 955         @echo '*** Warning: make $@ is unnecessary now.'
 956
 957 # ---------------------------------------------------------------------------
 958 # Kernel headers
 959 INSTALL_HDR_PATH=$(objtree)/usr
 960 export INSTALL_HDR_PATH
 961
 962 HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
 963
 964 PHONY += headers_install_all
 965 headers_install_all: include/linux/version.h scripts_basic FORCE
 966         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 967         $(Q)for arch in $(HDRARCHES); do \
 968          $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
 969          done
 970
 971 PHONY += headers_install
 972 headers_install: include/linux/version.h scripts_basic FORCE
 973         @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
 974           echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
 975           exit 1 ; fi
 976         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 977         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
 978
 979 PHONY += headers_check_all
 980 headers_check_all: headers_install_all
 981         $(Q)for arch in $(HDRARCHES); do \
 982          $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
 983          done
 984
 985 PHONY += headers_check
 986 headers_check: headers_install
 987         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
 988
 989 # ---------------------------------------------------------------------------
 990 # Modules
 991
 992 ifdef CONFIG_MODULES
 993
 994 # By default, build modules as well
 995
 996 all: modules
 997
 998 #       Build modules
 999
1000 PHONY += modules
1001 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1002         @echo '  Building modules, stage 2.';
1003         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1004
1005
1006 # Target to prepare building external modules
1007 PHONY += modules_prepare
1008 modules_prepare: prepare scripts
1009
1010 # Target to install modules
1011 PHONY += modules_install
1012 modules_install: _modinst_ _modinst_post
1013
1014 PHONY += _modinst_
1015 _modinst_:
1016         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1017                 echo "Warning: you may need to install module-init-tools"; \
1018                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1019                 sleep 1; \
1020         fi
1021         @rm -rf $(MODLIB)/kernel
1022         @rm -f $(MODLIB)/source
1023         @mkdir -p $(MODLIB)/kernel
1024         @ln -s $(srctree) $(MODLIB)/source
1025         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1026                 rm -f $(MODLIB)/build ; \
1027                 ln -s $(objtree) $(MODLIB)/build ; \
1028         fi
1029         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1030
1031 # If System.map exists, run depmod.  This deliberately does not have a
1032 # dependency on System.map since that would run the dependency tree on
1033 # vmlinux.  This depmod is only for convenience to give the initial
1034 # boot a modules.dep even before / is mounted read-write.  However the
1035 # boot script depmod is the master version.
1036 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
1037 depmod_opts     :=
1038 else
1039 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
1040 endif
1041 PHONY += _modinst_post
1042 _modinst_post: _modinst_
1043         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1044
1045 else # CONFIG_MODULES
1046
1047 # Modules not configured
1048 # ---------------------------------------------------------------------------
1049
1050 modules modules_install: FORCE
1051         @echo
1052         @echo "The present kernel configuration has modules disabled."
1053         @echo "Type 'make config' and enable loadable module support."
1054         @echo "Then build a kernel with module support enabled."
1055         @echo
1056         @exit 1
1057
1058 endif # CONFIG_MODULES
1059
1060 ###
1061 # Cleaning is done on three levels.
1062 # make clean     Delete most generated files
1063 #                Leave enough to build external modules
1064 # make mrproper  Delete the current configuration, and all generated files
1065 # make distclean Remove editor backup files, patch leftover files and the like
1066
1067 # Directories & files removed with 'make clean'
1068 CLEAN_DIRS  += $(MODVERDIR)
1069 CLEAN_FILES +=  vmlinux System.map \
1070                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1071
1072 # Directories & files removed with 'make mrproper'
1073 MRPROPER_DIRS  += include/config include2 usr/include
1074 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1075                   include/linux/autoconf.h include/linux/version.h      \
1076                   include/linux/utsrelease.h                            \
1077                   Module.symvers tags TAGS cscope*
1078
1079 # clean - Delete most, but leave enough to build external modules
1080 #
1081 clean: rm-dirs  := $(CLEAN_DIRS)
1082 clean: rm-files := $(CLEAN_FILES)
1083 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1084
1085 PHONY += $(clean-dirs) clean archclean
1086 $(clean-dirs):
1087         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1088
1089 clean: archclean $(clean-dirs)
1090         $(call cmd,rmdirs)
1091         $(call cmd,rmfiles)
1092         @find . $(RCS_FIND_IGNORE) \
1093                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1094                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1095                 -o -name '*.symtypes' \) \
1096                 -type f -print | xargs rm -f
1097
1098 # mrproper - Delete all generated files, including .config
1099 #
1100 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1101 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1102 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1103
1104 PHONY += $(mrproper-dirs) mrproper archmrproper
1105 $(mrproper-dirs):
1106         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1107
1108 mrproper: clean archmrproper $(mrproper-dirs)
1109         $(call cmd,rmdirs)
1110         $(call cmd,rmfiles)
1111
1112 # distclean
1113 #
1114 PHONY += distclean
1115
1116 distclean: mrproper
1117         @find $(srctree) $(RCS_FIND_IGNORE) \
1118                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1119                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1120                 -o -name '.*.rej' -o -size 0 \
1121                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1122                 -type f -print | xargs rm -f
1123
1124
1125 # Packaging of the kernel to various formats
1126 # ---------------------------------------------------------------------------
1127 # rpm target kept for backward compatibility
1128 package-dir     := $(srctree)/scripts/package
1129
1130 %pkg: include/config/kernel.release FORCE
1131         $(Q)$(MAKE) $(build)=$(package-dir) $@
1132 rpm: include/config/kernel.release FORCE
1133         $(Q)$(MAKE) $(build)=$(package-dir) $@
1134
1135
1136 # Brief documentation of the typical targets used
1137 # ---------------------------------------------------------------------------
1138
1139 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1140 boards := $(notdir $(boards))
1141
1142 help:
1143         @echo  'Cleaning targets:'
1144         @echo  '  clean           - Remove most generated files but keep the config and'
1145         @echo  '                    enough build support to build external modules'
1146         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1147         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1148         @echo  ''
1149         @echo  'Configuration targets:'
1150         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1151         @echo  ''
1152         @echo  'Other generic targets:'
1153         @echo  '  all             - Build all targets marked with [*]'
1154         @echo  '* vmlinux         - Build the bare kernel'
1155         @echo  '* modules         - Build all modules'
1156         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1157         @echo  '  dir/            - Build all files in dir and below'
1158         @echo  '  dir/file.[ois]  - Build specified target only'
1159         @echo  '  dir/file.ko     - Build module including final link'
1160         @echo  '  rpm             - Build a kernel as an RPM package'
1161         @echo  '  tags/TAGS       - Generate tags file for editors'
1162         @echo  '  cscope          - Generate cscope index'
1163         @echo  '  kernelrelease   - Output the release version string'
1164         @echo  '  kernelversion   - Output the version stored in Makefile'
1165         @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1166          echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1167          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1168          fi
1169         @echo  ''
1170         @echo  'Static analysers'
1171         @echo  '  checkstack      - Generate a list of stack hogs'
1172         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1173         @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1174          echo  '  headers_check   - Sanity check on exported headers'; \
1175          fi
1176         @echo  ''
1177         @echo  'Kernel packaging:'
1178         @$(MAKE) $(build)=$(package-dir) help
1179         @echo  ''
1180         @echo  'Documentation targets:'
1181         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1182         @echo  ''
1183         @echo  'Architecture specific targets ($(ARCH)):'
1184         @$(if $(archhelp),$(archhelp),\
1185                 echo '  No architecture specific help defined for $(ARCH)')
1186         @echo  ''
1187         @$(if $(boards), \
1188                 $(foreach b, $(boards), \
1189                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1190                 echo '')
1191
1192         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1193         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1194         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1195         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1196         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1197         @echo  ''
1198         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1199         @echo  'For further info see the ./README file'
1200
1201
1202 # Documentation targets
1203 # ---------------------------------------------------------------------------
1204 %docs: scripts_basic FORCE
1205         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1206
1207 else # KBUILD_EXTMOD
1208
1209 ###
1210 # External module support.
1211 # When building external modules the kernel used as basis is considered
1212 # read-only, and no consistency checks are made and the make
1213 # system is not used on the basis kernel. If updates are required
1214 # in the basis kernel ordinary make commands (without M=...) must
1215 # be used.
1216 #
1217 # The following are the only valid targets when building external
1218 # modules.
1219 # make M=dir clean     Delete all automatically generated files
1220 # make M=dir modules   Make all modules in specified dir
1221 # make M=dir           Same as 'make M=dir modules'
1222 # make M=dir modules_install
1223 #                      Install the modules built in the module directory
1224 #                      Assumes install directory is already created
1225
1226 # We are always building modules
1227 KBUILD_MODULES := 1
1228 PHONY += crmodverdir
1229 crmodverdir:
1230         $(Q)mkdir -p $(MODVERDIR)
1231         $(Q)rm -f $(MODVERDIR)/*
1232
1233 PHONY += $(objtree)/Module.symvers
1234 $(objtree)/Module.symvers:
1235         @test -e $(objtree)/Module.symvers || ( \
1236         echo; \
1237         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1238         echo "           is missing; modules will have no dependencies and modversions."; \
1239         echo )
1240
1241 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1242 PHONY += $(module-dirs) modules
1243 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1244         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1245
1246 modules: $(module-dirs)
1247         @echo '  Building modules, stage 2.';
1248         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1249
1250 PHONY += modules_install
1251 modules_install: _emodinst_ _emodinst_post
1252
1253 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1254 PHONY += _emodinst_
1255 _emodinst_:
1256         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1257         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1258
1259 # Run depmod only is we have System.map and depmod is executable
1260 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1261       cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1262                       $(DEPMOD) -ae -F System.map             \
1263                       $(if $(strip $(INSTALL_MOD_PATH)),      \
1264                       -b $(INSTALL_MOD_PATH) -r)              \
1265                       $(KERNELRELEASE);                       \
1266                    fi
1267
1268 PHONY += _emodinst_post
1269 _emodinst_post: _emodinst_
1270         $(call cmd,depmod)
1271
1272 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1273
1274 PHONY += $(clean-dirs) clean
1275 $(clean-dirs):
1276         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1277
1278 clean:  rm-dirs := $(MODVERDIR)
1279 clean: $(clean-dirs)
1280         $(call cmd,rmdirs)
1281         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1282                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1283                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1284                 -type f -print | xargs rm -f
1285
1286 help:
1287         @echo  '  Building external modules.'
1288         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1289         @echo  ''
1290         @echo  '  modules         - default target, build the module(s)'
1291         @echo  '  modules_install - install the module'
1292         @echo  '  clean           - remove generated files in module directory only'
1293         @echo  ''
1294
1295 # Dummies...
1296 PHONY += prepare scripts
1297 prepare: ;
1298 scripts: ;
1299 endif # KBUILD_EXTMOD
1300
1301 # Generate tags for editors
1302 # ---------------------------------------------------------------------------
1303
1304 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1305 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1306 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1307
1308 ifeq ($(src),$(obj))
1309 __srctree =
1310 else
1311 __srctree = $(srctree)/
1312 endif
1313
1314 ifeq ($(ALLSOURCE_ARCHS),)
1315 ifeq ($(ARCH),um)
1316 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1317 else
1318 ALLINCLUDE_ARCHS := $(ARCH)
1319 endif
1320 else
1321 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1322 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1323 endif
1324
1325 ALLSOURCE_ARCHS := $(ARCH)
1326
1327 define find-sources
1328         ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
1329                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1330                     -name $1 -print; \
1331           done ; \
1332           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1333                -name $1 -print; \
1334           find $(__srctree)include $(RCS_FIND_IGNORE) \
1335                \( -name config -o -name 'asm-*' \) -prune \
1336                -o -name $1 -print; \
1337           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1338                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1339                     -name $1 -print; \
1340           done ; \
1341           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1342                -name $1 -print; \
1343           find $(__srctree) $(RCS_FIND_IGNORE) \
1344                \( -name include -o -name arch \) -prune -o \
1345                -name $1 -print; \
1346           )
1347 endef
1348
1349 define all-sources
1350         $(call find-sources,'*.[chS]')
1351 endef
1352 define all-kconfigs
1353         $(call find-sources,'Kconfig*')
1354 endef
1355 define all-defconfigs
1356         $(call find-sources,'defconfig')
1357 endef
1358
1359 define xtags
1360         if $1 --version 2>&1 | grep -iq exuberant; then \
1361             $(all-sources) | xargs $1 -a \
1362                 -I __initdata,__exitdata,__acquires,__releases \
1363                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1364                 --extra=+f --c-kinds=+px \
1365                 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1366             $(all-kconfigs) | xargs $1 -a \
1367                 --langdef=kconfig \
1368                 --language-force=kconfig \
1369                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1370             $(all-defconfigs) | xargs -r $1 -a \
1371                 --langdef=dotconfig \
1372                 --language-force=dotconfig \
1373                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1374         elif $1 --version 2>&1 | grep -iq emacs; then \
1375             $(all-sources) | xargs $1 -a; \
1376             $(all-kconfigs) | xargs $1 -a \
1377                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1378             $(all-defconfigs) | xargs -r $1 -a \
1379                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1380         else \
1381             $(all-sources) | xargs $1 -a; \
1382         fi
1383 endef
1384
1385 quiet_cmd_cscope-file = FILELST cscope.files
1386       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1387
1388 quiet_cmd_cscope = MAKE    cscope.out
1389       cmd_cscope = cscope -b
1390
1391 cscope: FORCE
1392         $(call cmd,cscope-file)
1393         $(call cmd,cscope)
1394
1395 quiet_cmd_TAGS = MAKE   $@
1396 define cmd_TAGS
1397         rm -f $@; \
1398         $(call xtags,etags)
1399 endef
1400
1401 TAGS: FORCE
1402         $(call cmd,TAGS)
1403
1404 quiet_cmd_tags = MAKE   $@
1405 define cmd_tags
1406         rm -f $@; \
1407         $(call xtags,ctags)
1408 endef
1409
1410 tags: FORCE
1411         $(call cmd,tags)
1412
1413
1414 # Scripts to check various things for consistency
1415 # ---------------------------------------------------------------------------
1416
1417 includecheck:
1418         find * $(RCS_FIND_IGNORE) \
1419                 -name '*.[hcS]' -type f -print | sort \
1420                 | xargs $(PERL) -w scripts/checkincludes.pl
1421
1422 versioncheck:
1423         find * $(RCS_FIND_IGNORE) \
1424                 -name '*.[hcS]' -type f -print | sort \
1425                 | xargs $(PERL) -w scripts/checkversion.pl
1426
1427 namespacecheck:
1428         $(PERL) $(srctree)/scripts/namespace.pl
1429
1430 endif #ifeq ($(config-targets),1)
1431 endif #ifeq ($(mixed-targets),1)
1432
1433 PHONY += checkstack kernelrelease kernelversion
1434
1435 # UML needs a little special treatment here.  It wants to use the host
1436 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1437 # else wants $(ARCH), including people doing cross-builds, which means
1438 # that $(SUBARCH) doesn't work here.
1439 ifeq ($(ARCH), um)
1440 CHECKSTACK_ARCH := $(SUBARCH)
1441 else
1442 CHECKSTACK_ARCH := $(ARCH)
1443 endif
1444 checkstack:
1445         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1446         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1447
1448 kernelrelease:
1449         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1450         $(error kernelrelease not valid - run 'make prepare' to update it))
1451 kernelversion:
1452         @echo $(KERNELVERSION)
1453
1454 # Single targets
1455 # ---------------------------------------------------------------------------
1456 # Single targets are compatible with:
1457 # - build whith mixed source and output
1458 # - build with separate output dir 'make O=...'
1459 # - external modules
1460 #
1461 #  target-dir => where to store outputfile
1462 #  build-dir  => directory in kernel source tree to use
1463
1464 ifeq ($(KBUILD_EXTMOD),)
1465         build-dir  = $(patsubst %/,%,$(dir $@))
1466         target-dir = $(dir $@)
1467 else
1468         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1469         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1470         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1471 endif
1472
1473 %.s: %.c prepare scripts FORCE
1474         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1475 %.i: %.c prepare scripts FORCE
1476         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1477 %.o: %.c prepare scripts FORCE
1478         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1479 %.lst: %.c prepare scripts FORCE
1480         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1481 %.s: %.S prepare scripts FORCE
1482         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1483 %.o: %.S prepare scripts FORCE
1484         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1485 %.symtypes: %.c prepare scripts FORCE
1486         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1487
1488 # Modules
1489 /: prepare scripts FORCE
1490         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1491         $(build)=$(build-dir)
1492 %/: prepare scripts FORCE
1493         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1494         $(build)=$(build-dir)
1495 %.ko: prepare scripts FORCE
1496         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1497         $(build)=$(build-dir) $(@:.ko=.o)
1498         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1499
1500 # FIXME Should go into a make.lib or something
1501 # ===========================================================================
1502
1503 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1504       cmd_rmdirs = rm -rf $(rm-dirs)
1505
1506 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1507       cmd_rmfiles = rm -f $(rm-files)
1508
1509
1510 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1511           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1512           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1513
1514 quiet_cmd_as_o_S = AS      $@
1515 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1516
1517 # read all saved command lines
1518
1519 targets := $(wildcard $(sort $(targets)))
1520 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1521
1522 ifneq ($(cmd_files),)
1523   $(cmd_files): ;       # Do not try to update included dependency files
1524   include $(cmd_files)
1525 endif
1526
1527 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1528 # Usage:
1529 # $(Q)$(MAKE) $(clean)=dir
1530 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1531
1532 endif   # skip-makefile
1533
1534 PHONY += FORCE
1535 FORCE:
1536
1537 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1538 Makefile: ;
1539
1540 # Declare the contents of the .PHONY variable as phony.  We keep that
1541 # information in a variable se we can use it in if_changed and friends.
1542 .PHONY: $(PHONY)