Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 19
   4 EXTRAVERSION =-rc4
   5 NAME=Avast! A bilge rat!
   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 print "Entering directory ..."
  14 MAKEFLAGS += --no-print-directory
  15
  16 # We are using a recursive build, so we need to do a little thinking
  17 # to get the ordering right.
  18 #
  19 # Most importantly: sub-Makefiles should only ever modify files in
  20 # their own directory. If in some directory we have a dependency on
  21 # a file in another dir (which doesn't happen often, but it's often
  22 # unavoidable when linking the built-in.o targets which finally
  23 # turn into vmlinux), we will call a sub make in that other dir, and
  24 # after that we are sure that everything which is in that other dir
  25 # is now up to date.
  26 #
  27 # The only cases where we need to modify files which have global
  28 # effects are thus separated out and done before the recursive
  29 # descending is started. They are now explicitly listed as the
  30 # prepare rule.
  31
  32 # To put more focus on warnings, be less verbose as default
  33 # Use 'make V=1' to see the full commands
  34
  35 ifdef V
  36   ifeq ("$(origin V)", "command line")
  37     KBUILD_VERBOSE = $(V)
  38   endif
  39 endif
  40 ifndef KBUILD_VERBOSE
  41   KBUILD_VERBOSE = 0
  42 endif
  43
  44 # Call a source code checker (by default, "sparse") as part of the
  45 # C compilation.
  46 #
  47 # Use 'make C=1' to enable checking of only re-compiled files.
  48 # Use 'make C=2' to enable checking of *all* source files, regardless
  49 # of whether they are re-compiled or not.
  50 #
  51 # See the file "Documentation/sparse.txt" for more details, including
  52 # where to get the "sparse" utility.
  53
  54 ifdef C
  55   ifeq ("$(origin C)", "command line")
  56     KBUILD_CHECKSRC = $(C)
  57   endif
  58 endif
  59 ifndef KBUILD_CHECKSRC
  60   KBUILD_CHECKSRC = 0
  61 endif
  62
  63 # Use make M=dir to specify directory of external module to build
  64 # Old syntax make ... SUBDIRS=$PWD is still supported
  65 # Setting the environment variable KBUILD_EXTMOD take precedence
  66 ifdef SUBDIRS
  67   KBUILD_EXTMOD ?= $(SUBDIRS)
  68 endif
  69 ifdef M
  70   ifeq ("$(origin M)", "command line")
  71     KBUILD_EXTMOD := $(M)
  72   endif
  73 endif
  74
  75
  76 # kbuild supports saving output files in a separate directory.
  77 # To locate output files in a separate directory two syntaxes are supported.
  78 # In both cases the working directory must be the root of the kernel src.
  79 # 1) O=
  80 # Use "make O=dir/to/store/output/files/"
  81 #
  82 # 2) Set KBUILD_OUTPUT
  83 # Set the environment variable KBUILD_OUTPUT to point to the directory
  84 # where the output files shall be placed.
  85 # export KBUILD_OUTPUT=dir/to/store/output/files/
  86 # make
  87 #
  88 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  89 # variable.
  90
  91
  92 # KBUILD_SRC is set on invocation of make in OBJ directory
  93 # KBUILD_SRC is not intended to be used by the regular user (for now)
  94 ifeq ($(KBUILD_SRC),)
  95
  96 # OK, Make called in directory where kernel src resides
  97 # Do we want to locate output files in a separate directory?
  98 ifdef O
  99   ifeq ("$(origin O)", "command line")
 100     KBUILD_OUTPUT := $(O)
 101   endif
 102 endif
 103
 104 # That's our default target when none is given on the command line
 105 PHONY := _all
 106 _all:
 107
 108 ifneq ($(KBUILD_OUTPUT),)
 109 # Invoke a second make in the output directory, passing relevant variables
 110 # check that the output directory actually exists
 111 saved-output := $(KBUILD_OUTPUT)
 112 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 113 $(if $(KBUILD_OUTPUT),, \
 114      $(error output directory "$(saved-output)" does not exist))
 115
 116 PHONY += $(MAKECMDGOALS)
 117
 118 $(filter-out _all,$(MAKECMDGOALS)) _all:
 119         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 120         KBUILD_SRC=$(CURDIR) \
 121         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
 122
 123 # Leave processing to above invocation of make
 124 skip-makefile := 1
 125 endif # ifneq ($(KBUILD_OUTPUT),)
 126 endif # ifeq ($(KBUILD_SRC),)
 127
 128 # We process the rest of the Makefile if this is the final invocation of make
 129 ifeq ($(skip-makefile),)
 130
 131 # If building an external module we do not care about the all: rule
 132 # but instead _all depend on modules
 133 PHONY += all
 134 ifeq ($(KBUILD_EXTMOD),)
 135 _all: all
 136 else
 137 _all: modules
 138 endif
 139
 140 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 141 TOPDIR          := $(srctree)
 142 # FIXME - TOPDIR is obsolete, use srctree/objtree
 143 objtree         := $(CURDIR)
 144 src             := $(srctree)
 145 obj             := $(objtree)
 146
 147 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 148
 149 export srctree objtree VPATH TOPDIR
 150
 151
 152 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 153 # first, and if a usermode build is happening, the "ARCH=um" on the command
 154 # line overrides the setting of ARCH below.  If a native build is happening,
 155 # then ARCH is assigned, getting whatever value it gets normally, and
 156 # SUBARCH is subsequently ignored.
 157
 158 SUBARCH := mips
 159
 160 # Cross compiling and selecting different set of gcc/bin-utils
 161 # ---------------------------------------------------------------------------
 162 #
 163 # When performing cross compilation for other architectures ARCH shall be set
 164 # to the target architecture. (See arch/* for the possibilities).
 165 # ARCH can be set during invocation of make:
 166 # make ARCH=ia64
 167 # Another way is to have ARCH set in the environment.
 168 # The default ARCH is the host where make is executed.
 169
 170 # CROSS_COMPILE specify the prefix used for all executables used
 171 # during compilation. Only gcc and related bin-utils executables
 172 # are prefixed with $(CROSS_COMPILE).
 173 # CROSS_COMPILE can be set on the command line
 174 # make CROSS_COMPILE=ia64-linux-
 175 # Alternatively CROSS_COMPILE can be set in the environment.
 176 # Default value for CROSS_COMPILE is not to prefix executables
 177 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 178
 179 ARCH            ?= $(SUBARCH)
 180 CROSS_COMPILE   ?=
 181
 182 # Architecture as present in compile.h
 183 UTS_MACHINE := $(ARCH)
 184
 185 KCONFIG_CONFIG  ?= .config
 186
 187 # SHELL used by kbuild
 188 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 189           else if [ -x /bin/bash ]; then echo /bin/bash; \
 190           else echo sh; fi ; fi)
 191
 192 HOSTCC       = gcc
 193 HOSTCXX      = g++
 194 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 195 HOSTCXXFLAGS = -O2
 196
 197 # Decide whether to build built-in, modular, or both.
 198 # Normally, just do built-in.
 199
 200 KBUILD_MODULES :=
 201 KBUILD_BUILTIN := 1
 202
 203 #       If we have only "make modules", don't compile built-in objects.
 204 #       When we're building modules with modversions, we need to consider
 205 #       the built-in objects during the descend as well, in order to
 206 #       make sure the checksums are up to date before we record them.
 207
 208 ifeq ($(MAKECMDGOALS),modules)
 209   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 210 endif
 211
 212 #       If we have "make <whatever> modules", compile modules
 213 #       in addition to whatever we do anyway.
 214 #       Just "make" or "make all" shall build modules as well
 215
 216 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 217   KBUILD_MODULES := 1
 218 endif
 219
 220 ifeq ($(MAKECMDGOALS),)
 221   KBUILD_MODULES := 1
 222 endif
 223
 224 export KBUILD_MODULES KBUILD_BUILTIN
 225 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 226
 227 # Beautify output
 228 # ---------------------------------------------------------------------------
 229 #
 230 # Normally, we echo the whole command before executing it. By making
 231 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 232 # $(quiet) to choose other forms of output instead, e.g.
 233 #
 234 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 235 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 236 #
 237 # If $(quiet) is empty, the whole command will be printed.
 238 # If it is set to "quiet_", only the short version will be printed.
 239 # If it is set to "silent_", nothing will be printed at all, since
 240 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 241 #
 242 # A simple variant is to prefix commands with $(Q) - that's useful
 243 # for commands that shall be hidden in non-verbose mode.
 244 #
 245 #       $(Q)ln $@ :<
 246 #
 247 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 248 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 249
 250 ifeq ($(KBUILD_VERBOSE),1)
 251   quiet =
 252   Q =
 253 else
 254   quiet=quiet_
 255   Q = @
 256 endif
 257
 258 # If the user is running make -s (silent mode), suppress echoing of
 259 # commands
 260
 261 ifneq ($(findstring s,$(MAKEFLAGS)),)
 262   quiet=silent_
 263 endif
 264
 265 export quiet Q KBUILD_VERBOSE
 266
 267
 268 # Look for make include files relative to root of kernel src
 269 MAKEFLAGS += --include-dir=$(srctree)
 270
 271 # We need some generic definitions
 272 include  $(srctree)/scripts/Kbuild.include
 273
 274 # Do not use make's built-in rules and variables
 275 # This increases performance and avoid hard-to-debug behavour
 276 MAKEFLAGS += -rR
 277
 278 # Make variables (CC, etc...)
 279
 280 AS              = $(CROSS_COMPILE)as
 281 LD              = $(CROSS_COMPILE)ld
 282 CC              = $(CROSS_COMPILE)gcc
 283 CPP             = $(CC) -E
 284 AR              = $(CROSS_COMPILE)ar
 285 NM              = $(CROSS_COMPILE)nm
 286 STRIP           = $(CROSS_COMPILE)strip
 287 OBJCOPY         = $(CROSS_COMPILE)objcopy
 288 OBJDUMP         = $(CROSS_COMPILE)objdump
 289 AWK             = awk
 290 GENKSYMS        = scripts/genksyms/genksyms
 291 DEPMOD          = /sbin/depmod
 292 KALLSYMS        = scripts/kallsyms
 293 PERL            = perl
 294 CHECK           = sparse
 295
 296 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 297 MODFLAGS        = -DMODULE
 298 CFLAGS_MODULE   = $(MODFLAGS)
 299 AFLAGS_MODULE   = $(MODFLAGS)
 300 LDFLAGS_MODULE  = -r
 301 CFLAGS_KERNEL   =
 302 AFLAGS_KERNEL   =
 303
 304
 305 # Use LINUXINCLUDE when you must reference the include/ directory.
 306 # Needed to be compatible with the O= option
 307 LINUXINCLUDE    := -Iinclude \
 308                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 309                    -include include/linux/autoconf.h
 310
 311 CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)
 312
 313 CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 314                    -fno-strict-aliasing -fno-common
 315 AFLAGS          := -D__ASSEMBLY__
 316
 317 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 318 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 319 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 320
 321 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 322 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 323 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 324 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 325
 326 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 327 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 328 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 329
 330 # When compiling out-of-tree modules, put MODVERDIR in the module
 331 # tree rather than in the kernel tree. The kernel tree might
 332 # even be read-only.
 333 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 334
 335 # Files to ignore in find ... statements
 336
 337 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
 338 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 339
 340 # ===========================================================================
 341 # Rules shared between *config targets and build targets
 342
 343 # Basic helpers built in scripts/
 344 PHONY += scripts_basic
 345 scripts_basic:
 346         $(Q)$(MAKE) $(build)=scripts/basic
 347
 348 # To avoid any implicit rule to kick in, define an empty command.
 349 scripts/basic/%: scripts_basic ;
 350
 351 PHONY += outputmakefile
 352 # outputmakefile generates a Makefile in the output directory, if using a
 353 # separate output directory. This allows convenient use of make in the
 354 # output directory.
 355 outputmakefile:
 356 ifneq ($(KBUILD_SRC),)
 357         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 358             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 359 endif
 360
 361 # To make sure we do not include .config for any of the *config targets
 362 # catch them early, and hand them over to scripts/kconfig/Makefile
 363 # It is allowed to specify more targets when calling make, including
 364 # mixing *config targets and build targets.
 365 # For example 'make oldconfig all'.
 366 # Detect when mixed targets is specified, and make a second invocation
 367 # of make so .config is not included in this case either (for *config).
 368
 369 no-dot-config-targets := clean mrproper distclean \
 370                          cscope TAGS tags help %docs check% \
 371                          include/linux/version.h headers_% \
 372                          kernelrelease kernelversion
 373
 374 config-targets := 0
 375 mixed-targets  := 0
 376 dot-config     := 1
 377
 378 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 379         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 380                 dot-config := 0
 381         endif
 382 endif
 383
 384 ifeq ($(KBUILD_EXTMOD),)
 385         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 386                 config-targets := 1
 387                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 388                         mixed-targets := 1
 389                 endif
 390         endif
 391 endif
 392
 393 ifeq ($(mixed-targets),1)
 394 # ===========================================================================
 395 # We're called with mixed targets (*config and build targets).
 396 # Handle them one by one.
 397
 398 %:: FORCE
 399         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 400
 401 else
 402 ifeq ($(config-targets),1)
 403 # ===========================================================================
 404 # *config targets only - make sure prerequisites are updated, and descend
 405 # in scripts/kconfig to make the *config target
 406
 407 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 408 # KBUILD_DEFCONFIG may point out an alternative default configuration
 409 # used for 'make defconfig'
 410 include $(srctree)/arch/$(ARCH)/Makefile
 411 export KBUILD_DEFCONFIG
 412
 413 config %config: scripts_basic outputmakefile FORCE
 414         $(Q)mkdir -p include/linux include/config
 415         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 416
 417 else
 418 # ===========================================================================
 419 # Build targets only - this includes vmlinux, arch specific targets, clean
 420 # targets and others. In general all targets except *config targets.
 421
 422 ifeq ($(KBUILD_EXTMOD),)
 423 # Additional helpers built in scripts/
 424 # Carefully list dependencies so we do not try to build scripts twice
 425 # in parallel
 426 PHONY += scripts
 427 scripts: scripts_basic include/config/auto.conf
 428         $(Q)$(MAKE) $(build)=$(@)
 429
 430 # Objects we will link into vmlinux / subdirs we need to visit
 431 init-y          := init/
 432 drivers-y       := drivers/ sound/
 433 net-y           := net/
 434 libs-y          := lib/
 435 core-y          := usr/
 436 endif # KBUILD_EXTMOD
 437
 438 ifeq ($(dot-config),1)
 439 # Read in config
 440 -include include/config/auto.conf
 441
 442 ifeq ($(KBUILD_EXTMOD),)
 443 # Read in dependencies to all Kconfig* files, make sure to run
 444 # oldconfig if changes are detected.
 445 -include include/config/auto.conf.cmd
 446
 447 # To avoid any implicit rule to kick in, define an empty command
 448 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 449
 450 # If .config is newer than include/config/auto.conf, someone tinkered
 451 # with it and forgot to run make oldconfig.
 452 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 453 # we execute the config step to be sure to catch updated Kconfig files
 454 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 455         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 456 else
 457 # external modules needs include/linux/autoconf.h and include/config/auto.conf
 458 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 459 PHONY += include/config/auto.conf
 460
 461 include/config/auto.conf:
 462         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 463         echo;                                                           \
 464         echo "  ERROR: Kernel configuration is invalid.";               \
 465         echo "         include/linux/autoconf.h or $@ are missing.";    \
 466         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 467         echo;                                                           \
 468         /bin/false)
 469
 470 endif # KBUILD_EXTMOD
 471
 472 else
 473 # Dummy target needed, because used as prerequisite
 474 include/config/auto.conf: ;
 475 endif # $(dot-config)
 476
 477 # The all: target is the default when no target is given on the
 478 # command line.
 479 # This allow a user to issue only 'make' to build a kernel including modules
 480 # Defaults vmlinux but it is usually overridden in the arch makefile
 481 all: vmlinux
 482
 483 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 484 CFLAGS          += -Os
 485 else
 486 CFLAGS          += -O2
 487 endif
 488
 489 include $(srctree)/arch/$(ARCH)/Makefile
 490
 491 ifdef CONFIG_FRAME_POINTER
 492 CFLAGS          += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
 493 else
 494 CFLAGS          += -fomit-frame-pointer
 495 endif
 496
 497 ifdef CONFIG_UNWIND_INFO
 498 CFLAGS          += -fasynchronous-unwind-tables
 499 LDFLAGS_vmlinux += --eh-frame-hdr
 500 endif
 501
 502 ifdef CONFIG_DEBUG_INFO
 503 CFLAGS          += -g
 504 endif
 505
 506 # Force gcc to behave correct even for buggy distributions
 507 CFLAGS          += $(call cc-option, -fno-stack-protector)
 508
 509 # arch Makefile may override CC so keep this after arch Makefile is included
 510 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 511 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 512
 513 # warn about C99 declaration after statement
 514 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 515
 516 # disable pointer signed / unsigned warnings in gcc 4.0
 517 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 518
 519 # Default kernel image to build when no specific target is given.
 520 # KBUILD_IMAGE may be overruled on the command line or
 521 # set in the environment
 522 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 523 # this default value
 524 export KBUILD_IMAGE ?= vmlinux
 525
 526 #
 527 # INSTALL_PATH specifies where to place the updated kernel and system map
 528 # images. Default is /boot, but you can set it to other values
 529 export  INSTALL_PATH ?= /boot
 530
 531 #
 532 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 533 # relocations required by build roots.  This is not defined in the
 534 # makefile but the argument can be passed to make if needed.
 535 #
 536
 537 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 538 export MODLIB
 539
 540 #
 541 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 542 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 543 #  the default option --strip-debug will be used.  Otherwise,
 544 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 545
 546 ifdef INSTALL_MOD_STRIP
 547 ifeq ($(INSTALL_MOD_STRIP),1)
 548 mod_strip_cmd = $(STRIP) --strip-debug
 549 else
 550 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 551 endif # INSTALL_MOD_STRIP=1
 552 else
 553 mod_strip_cmd = true
 554 endif # INSTALL_MOD_STRIP
 555 export mod_strip_cmd
 556
 557
 558 ifeq ($(KBUILD_EXTMOD),)
 559 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 560
 561 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 562                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 563                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 564
 565 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 566                      $(init-n) $(init-) \
 567                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 568                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 569
 570 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 571 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 572 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 573 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 574 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 575 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 576 libs-y          := $(libs-y1) $(libs-y2)
 577
 578 # Build vmlinux
 579 # ---------------------------------------------------------------------------
 580 # vmlinux is built from the objects selected by $(vmlinux-init) and
 581 # $(vmlinux-main). Most are built-in.o files from top-level directories
 582 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 583 # Ordering when linking is important, and $(vmlinux-init) must be first.
 584 #
 585 # vmlinux
 586 #   ^
 587 #   |
 588 #   +-< $(vmlinux-init)
 589 #   |   +--< init/version.o + more
 590 #   |
 591 #   +--< $(vmlinux-main)
 592 #   |    +--< driver/built-in.o mm/built-in.o + more
 593 #   |
 594 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 595 #
 596 # vmlinux version (uname -v) cannot be updated during normal
 597 # descending-into-subdirs phase since we do not yet know if we need to
 598 # update vmlinux.
 599 # Therefore this step is delayed until just before final link of vmlinux -
 600 # except in the kallsyms case where it is done just before adding the
 601 # symbols to the kernel.
 602 #
 603 # System.map is generated to document addresses of all kernel symbols
 604
 605 vmlinux-init := $(head-y) $(init-y)
 606 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 607 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 608 vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
 609
 610 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 611 # May be overridden by arch/$(ARCH)/Makefile
 612 quiet_cmd_vmlinux__ ?= LD      $@
 613       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 614       -T $(vmlinux-lds) $(vmlinux-init)                          \
 615       --start-group $(vmlinux-main) --end-group                  \
 616       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 617
 618 # Generate new vmlinux version
 619 quiet_cmd_vmlinux_version = GEN     .version
 620       cmd_vmlinux_version = set -e;                     \
 621         if [ ! -r .version ]; then                      \
 622           rm -f .version;                               \
 623           echo 1 >.version;                             \
 624         else                                            \
 625           mv .version .old_version;                     \
 626           expr 0$$(cat .old_version) + 1 >.version;     \
 627         fi;                                             \
 628         $(MAKE) $(build)=init
 629
 630 # Generate System.map
 631 quiet_cmd_sysmap = SYSMAP
 632       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 633
 634 # Link of vmlinux
 635 # If CONFIG_KALLSYMS is set .version is already updated
 636 # Generate System.map and verify that the content is consistent
 637 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 638 # First command is ':' to allow us to use + in front of the rule
 639 define rule_vmlinux__
 640         :
 641         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 642
 643         $(call cmd,vmlinux__)
 644         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 645
 646         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 647           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 648         $(cmd_sysmap) $@ System.map;                                         \
 649         if [ $$? -ne 0 ]; then                                               \
 650                 rm -f $@;                                                    \
 651                 /bin/false;                                                  \
 652         fi;
 653         $(verify_kallsyms)
 654 endef
 655
 656
 657 ifdef CONFIG_KALLSYMS
 658 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 659 # It's a three stage process:
 660 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 661 #   empty
 662 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 663 #   the right size - vmlinux version (uname -v) is updated during this step
 664 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 665 #   but due to the added section, some addresses have shifted.
 666 #   From here, we generate a correct .tmp_kallsyms2.o
 667 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 668 # o Verify that the System.map from vmlinux matches the map from
 669 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 670 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 671 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 672 #   temporary bypass to allow the kernel to be built while the
 673 #   maintainers work out what went wrong with kallsyms.
 674
 675 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 676 last_kallsyms := 3
 677 else
 678 last_kallsyms := 2
 679 endif
 680
 681 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 682
 683 define verify_kallsyms
 684         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 685           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 686           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 687         $(Q)cmp -s System.map .tmp_System.map ||                             \
 688                 (echo Inconsistent kallsyms data;                            \
 689                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 690                  rm .tmp_kallsyms* ; /bin/false )
 691 endef
 692
 693 # Update vmlinux version before link
 694 # Use + in front of this rule to silent warning about make -j1
 695 # First command is ':' to allow us to use + in front of this rule
 696 cmd_ksym_ld = $(cmd_vmlinux__)
 697 define rule_ksym_ld
 698         :
 699         +$(call cmd,vmlinux_version)
 700         $(call cmd,vmlinux__)
 701         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 702 endef
 703
 704 # Generate .S file with all kernel symbols
 705 quiet_cmd_kallsyms = KSYM    $@
 706       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 707                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 708
 709 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 710         $(call if_changed_dep,as_o_S)
 711
 712 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 713         $(call cmd,kallsyms)
 714
 715 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 716 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 717         $(call if_changed_rule,ksym_ld)
 718
 719 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 720         $(call if_changed,vmlinux__)
 721
 722 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 723         $(call if_changed,vmlinux__)
 724
 725 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 726 $(KALLSYMS): scripts ;
 727
 728 # Generate some data for debugging strange kallsyms problems
 729 debug_kallsyms: .tmp_map$(last_kallsyms)
 730
 731 .tmp_map%: .tmp_vmlinux% FORCE
 732         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 733
 734 .tmp_map3: .tmp_map2
 735
 736 .tmp_map2: .tmp_map1
 737
 738 endif # ifdef CONFIG_KALLSYMS
 739
 740 # vmlinux image - including updated kernel symbols
 741 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
 742 ifdef CONFIG_HEADERS_CHECK
 743         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 744 endif
 745         $(call if_changed_rule,vmlinux__)
 746         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 747         $(Q)rm -f .old_version
 748
 749 # The actual objects are generated when descending,
 750 # make sure no implicit rule kicks in
 751 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 752
 753 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 754 # Preset locale variables to speed up the build process. Limit locale
 755 # tweaks to this spot to avoid wrong language settings when running
 756 # make menuconfig etc.
 757 # Error messages still appears in the original language
 758
 759 PHONY += $(vmlinux-dirs)
 760 $(vmlinux-dirs): prepare scripts
 761         $(Q)$(MAKE) $(build)=$@
 762
 763 # Build the kernel release string
 764 #
 765 # The KERNELRELEASE value built here is stored in the file
 766 # include/config/kernel.release, and is used when executing several
 767 # make targets, such as "make install" or "make modules_install."
 768 #
 769 # The eventual kernel release string consists of the following fields,
 770 # shown in a hierarchical format to show how smaller parts are concatenated
 771 # to form the larger and final value, with values coming from places like
 772 # the Makefile, kernel config options, make command line options and/or
 773 # SCM tag information.
 774 #
 775 #       $(KERNELVERSION)
 776 #         $(VERSION)                    eg, 2
 777 #         $(PATCHLEVEL)                 eg, 6
 778 #         $(SUBLEVEL)                   eg, 18
 779 #         $(EXTRAVERSION)               eg, -rc6
 780 #       $(localver-full)
 781 #         $(localver)
 782 #           localversion*               (all localversion* files)
 783 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 784 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 785 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 786 #           $(LOCALVERSION)             (from make command line if provided)
 787 #
 788 #  Note how the final $(localver-auto) string is included *only* if the
 789 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 790 # moment, only git is supported but other SCMs can edit the script
 791 # scripts/setlocalversion and add the appropriate checks as needed.
 792
 793 nullstring :=
 794 space      := $(nullstring) # end of line
 795
 796 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 797 __localver  = $(sort $(wildcard $(___localver)))
 798 # skip backup files (containing '~')
 799 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 800
 801 localver = $(subst $(space),, \
 802            $(shell cat /dev/null $(_localver)) \
 803            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 804
 805 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 806 # and if the SCM is know a tag from the SCM is appended.
 807 # The appended tag is determined by the SCM used.
 808 #
 809 # Currently, only git is supported.
 810 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 811 # checks as needed.
 812 ifdef CONFIG_LOCALVERSION_AUTO
 813         _localver-auto = $(shell $(CONFIG_SHELL) \
 814                           $(srctree)/scripts/setlocalversion $(srctree))
 815         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 816 endif
 817
 818 localver-full = $(localver)$(localver-auto)
 819
 820 # Store (new) KERNELRELASE string in include/config/kernel.release
 821 kernelrelease = $(KERNELVERSION)$(localver-full)
 822 include/config/kernel.release: include/config/auto.conf FORCE
 823         $(Q)rm -f $@
 824         $(Q)echo $(kernelrelease) > $@
 825
 826
 827 # Things we need to do before we recursively start building the kernel
 828 # or the modules are listed in "prepare".
 829 # A multi level approach is used. prepareN is processed before prepareN-1.
 830 # archprepare is used in arch Makefiles and when processed asm symlink,
 831 # version.h and scripts_basic is processed / created.
 832
 833 # Listed in dependency order
 834 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 835
 836 # prepare-all is deprecated, use prepare as valid replacement
 837 PHONY += prepare-all
 838
 839 # prepare3 is used to check if we are building in a separate output directory,
 840 # and if so do:
 841 # 1) Check that make has not been executed in the kernel src $(srctree)
 842 # 2) Create the include2 directory, used for the second asm symlink
 843 prepare3: include/config/kernel.release
 844 ifneq ($(KBUILD_SRC),)
 845         @echo '  Using $(srctree) as source for kernel'
 846         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 847                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 848                 echo "  in the '$(srctree)' directory.";\
 849                 /bin/false; \
 850         fi;
 851         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 852         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 853 endif
 854
 855 # prepare2 creates a makefile if using a separate output directory
 856 prepare2: prepare3 outputmakefile
 857
 858 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 859                    include/asm include/config/auto.conf
 860 ifneq ($(KBUILD_MODULES),)
 861         $(Q)mkdir -p $(MODVERDIR)
 862         $(Q)rm -f $(MODVERDIR)/*
 863 endif
 864
 865 archprepare: prepare1 scripts_basic
 866
 867 prepare0: archprepare FORCE
 868         $(Q)$(MAKE) $(build)=.
 869
 870 # All the preparing..
 871 prepare prepare-all: prepare0
 872
 873 # Leave this as default for preprocessing vmlinux.lds.S, which is now
 874 # done in arch/$(ARCH)/kernel/Makefile
 875
 876 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 877
 878 # FIXME: The asm symlink changes when $(ARCH) changes. That's
 879 # hard to detect, but I suppose "make mrproper" is a good idea
 880 # before switching between archs anyway.
 881
 882 include/asm:
 883         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 884         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 885         @ln -fsn asm-$(ARCH) $@
 886
 887 # Generate some files
 888 # ---------------------------------------------------------------------------
 889
 890 # KERNELRELEASE can change from a few different places, meaning version.h
 891 # needs to be updated, so this check is forced on all builds
 892
 893 uts_len := 64
 894 define filechk_utsrelease.h
 895         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 896           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 897           exit 1;                                                         \
 898         fi;                                                               \
 899         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
 900 endef
 901
 902 define filechk_version.h
 903         (echo \#define LINUX_VERSION_CODE $(shell                             \
 904         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
 905         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 906 endef
 907
 908 include/linux/version.h: $(srctree)/Makefile FORCE
 909         $(call filechk,version.h)
 910
 911 include/linux/utsrelease.h: include/config/kernel.release FORCE
 912         $(call filechk,utsrelease.h)
 913
 914 # ---------------------------------------------------------------------------
 915
 916 PHONY += depend dep
 917 depend dep:
 918         @echo '*** Warning: make $@ is unnecessary now.'
 919
 920 # ---------------------------------------------------------------------------
 921 # Kernel headers
 922 INSTALL_HDR_PATH=$(objtree)/usr
 923 export INSTALL_HDR_PATH
 924
 925 HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
 926
 927 PHONY += headers_install_all
 928 headers_install_all: include/linux/version.h scripts_basic FORCE
 929         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 930         $(Q)for arch in $(HDRARCHES); do \
 931          $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
 932          done
 933
 934 PHONY += headers_install
 935 headers_install: include/linux/version.h scripts_basic FORCE
 936         @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
 937           echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
 938           exit 1 ; fi
 939         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
 940         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
 941
 942 PHONY += headers_check
 943 headers_check: headers_install
 944         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
 945
 946 # ---------------------------------------------------------------------------
 947 # Modules
 948
 949 ifdef CONFIG_MODULES
 950
 951 # By default, build modules as well
 952
 953 all: modules
 954
 955 #       Build modules
 956
 957 PHONY += modules
 958 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
 959         @echo '  Building modules, stage 2.';
 960         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 961
 962
 963 # Target to prepare building external modules
 964 PHONY += modules_prepare
 965 modules_prepare: prepare scripts
 966
 967 # Target to install modules
 968 PHONY += modules_install
 969 modules_install: _modinst_ _modinst_post
 970
 971 PHONY += _modinst_
 972 _modinst_:
 973         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 974                 echo "Warning: you may need to install module-init-tools"; \
 975                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 976                 sleep 1; \
 977         fi
 978         @rm -rf $(MODLIB)/kernel
 979         @rm -f $(MODLIB)/source
 980         @mkdir -p $(MODLIB)/kernel
 981         @ln -s $(srctree) $(MODLIB)/source
 982         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 983                 rm -f $(MODLIB)/build ; \
 984                 ln -s $(objtree) $(MODLIB)/build ; \
 985         fi
 986         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 987
 988 # If System.map exists, run depmod.  This deliberately does not have a
 989 # dependency on System.map since that would run the dependency tree on
 990 # vmlinux.  This depmod is only for convenience to give the initial
 991 # boot a modules.dep even before / is mounted read-write.  However the
 992 # boot script depmod is the master version.
 993 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 994 depmod_opts     :=
 995 else
 996 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 997 endif
 998 PHONY += _modinst_post
 999 _modinst_post: _modinst_
1000         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1001
1002 else # CONFIG_MODULES
1003
1004 # Modules not configured
1005 # ---------------------------------------------------------------------------
1006
1007 modules modules_install: FORCE
1008         @echo
1009         @echo "The present kernel configuration has modules disabled."
1010         @echo "Type 'make config' and enable loadable module support."
1011         @echo "Then build a kernel with module support enabled."
1012         @echo
1013         @exit 1
1014
1015 endif # CONFIG_MODULES
1016
1017 ###
1018 # Cleaning is done on three levels.
1019 # make clean     Delete most generated files
1020 #                Leave enough to build external modules
1021 # make mrproper  Delete the current configuration, and all generated files
1022 # make distclean Remove editor backup files, patch leftover files and the like
1023
1024 # Directories & files removed with 'make clean'
1025 CLEAN_DIRS  += $(MODVERDIR)
1026 CLEAN_FILES +=  vmlinux System.map \
1027                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1028
1029 # Directories & files removed with 'make mrproper'
1030 MRPROPER_DIRS  += include/config include2 usr/include
1031 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1032                   include/linux/autoconf.h include/linux/version.h      \
1033                   include/linux/utsrelease.h                            \
1034                   Module.symvers tags TAGS cscope*
1035
1036 # clean - Delete most, but leave enough to build external modules
1037 #
1038 clean: rm-dirs  := $(CLEAN_DIRS)
1039 clean: rm-files := $(CLEAN_FILES)
1040 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1041
1042 PHONY += $(clean-dirs) clean archclean
1043 $(clean-dirs):
1044         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1045
1046 clean: archclean $(clean-dirs)
1047         $(call cmd,rmdirs)
1048         $(call cmd,rmfiles)
1049         @find . $(RCS_FIND_IGNORE) \
1050                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1051                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1052                 -o -name '*.symtypes' \) \
1053                 -type f -print | xargs rm -f
1054
1055 # mrproper - Delete all generated files, including .config
1056 #
1057 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1058 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1059 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1060
1061 PHONY += $(mrproper-dirs) mrproper archmrproper
1062 $(mrproper-dirs):
1063         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1064
1065 mrproper: clean archmrproper $(mrproper-dirs)
1066         $(call cmd,rmdirs)
1067         $(call cmd,rmfiles)
1068
1069 # distclean
1070 #
1071 PHONY += distclean
1072
1073 distclean: mrproper
1074         @find $(srctree) $(RCS_FIND_IGNORE) \
1075                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1076                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1077                 -o -name '.*.rej' -o -size 0 \
1078                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1079                 -type f -print | xargs rm -f
1080
1081
1082 # Packaging of the kernel to various formats
1083 # ---------------------------------------------------------------------------
1084 # rpm target kept for backward compatibility
1085 package-dir     := $(srctree)/scripts/package
1086
1087 %pkg: include/config/kernel.release FORCE
1088         $(Q)$(MAKE) $(build)=$(package-dir) $@
1089 rpm: include/config/kernel.release FORCE
1090         $(Q)$(MAKE) $(build)=$(package-dir) $@
1091
1092
1093 # Brief documentation of the typical targets used
1094 # ---------------------------------------------------------------------------
1095
1096 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1097 boards := $(notdir $(boards))
1098
1099 help:
1100         @echo  'Cleaning targets:'
1101         @echo  '  clean           - remove most generated files but keep the config and'
1102         @echo  '                    enough build support to build external modules'
1103         @echo  '  mrproper        - remove all generated files + config + various backup files'
1104         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1105         @echo  ''
1106         @echo  'Configuration targets:'
1107         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1108         @echo  ''
1109         @echo  'Other generic targets:'
1110         @echo  '  all             - Build all targets marked with [*]'
1111         @echo  '* vmlinux         - Build the bare kernel'
1112         @echo  '* modules         - Build all modules'
1113         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1114         @echo  '  dir/            - Build all files in dir and below'
1115         @echo  '  dir/file.[ois]  - Build specified target only'
1116         @echo  '  dir/file.ko     - Build module including final link'
1117         @echo  '  rpm             - Build a kernel as an RPM package'
1118         @echo  '  tags/TAGS       - Generate tags file for editors'
1119         @echo  '  cscope          - Generate cscope index'
1120         @echo  '  kernelrelease   - Output the release version string'
1121         @echo  '  kernelversion   - Output the version stored in Makefile'
1122         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1123          echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1124          fi
1125         @echo  '                    (default: $(INSTALL_HDR_PATH))'
1126         @echo  ''
1127         @echo  'Static analysers'
1128         @echo  '  checkstack      - Generate a list of stack hogs'
1129         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1130         @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1131          echo  '  headers_check   - Sanity check on exported headers'; \
1132          fi
1133         @echo  ''
1134         @echo  'Kernel packaging:'
1135         @$(MAKE) $(build)=$(package-dir) help
1136         @echo  ''
1137         @echo  'Documentation targets:'
1138         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1139         @echo  ''
1140         @echo  'Architecture specific targets ($(ARCH)):'
1141         @$(if $(archhelp),$(archhelp),\
1142                 echo '  No architecture specific help defined for $(ARCH)')
1143         @echo  ''
1144         @$(if $(boards), \
1145                 $(foreach b, $(boards), \
1146                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1147                 echo '')
1148
1149         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1150         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1151         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1152         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1153         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1154         @echo  ''
1155         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1156         @echo  'For further info see the ./README file'
1157
1158
1159 # Documentation targets
1160 # ---------------------------------------------------------------------------
1161 %docs: scripts_basic FORCE
1162         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1163
1164 else # KBUILD_EXTMOD
1165
1166 ###
1167 # External module support.
1168 # When building external modules the kernel used as basis is considered
1169 # read-only, and no consistency checks are made and the make
1170 # system is not used on the basis kernel. If updates are required
1171 # in the basis kernel ordinary make commands (without M=...) must
1172 # be used.
1173 #
1174 # The following are the only valid targets when building external
1175 # modules.
1176 # make M=dir clean     Delete all automatically generated files
1177 # make M=dir modules   Make all modules in specified dir
1178 # make M=dir           Same as 'make M=dir modules'
1179 # make M=dir modules_install
1180 #                      Install the modules built in the module directory
1181 #                      Assumes install directory is already created
1182
1183 # We are always building modules
1184 KBUILD_MODULES := 1
1185 PHONY += crmodverdir
1186 crmodverdir:
1187         $(Q)mkdir -p $(MODVERDIR)
1188         $(Q)rm -f $(MODVERDIR)/*
1189
1190 PHONY += $(objtree)/Module.symvers
1191 $(objtree)/Module.symvers:
1192         @test -e $(objtree)/Module.symvers || ( \
1193         echo; \
1194         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1195         echo "           is missing; modules will have no dependencies and modversions."; \
1196         echo )
1197
1198 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1199 PHONY += $(module-dirs) modules
1200 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1201         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1202
1203 modules: $(module-dirs)
1204         @echo '  Building modules, stage 2.';
1205         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1206
1207 PHONY += modules_install
1208 modules_install: _emodinst_ _emodinst_post
1209
1210 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1211 PHONY += _emodinst_
1212 _emodinst_:
1213         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1214         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1215
1216 # Run depmod only is we have System.map and depmod is executable
1217 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1218       cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1219                       $(DEPMOD) -ae -F System.map             \
1220                       $(if $(strip $(INSTALL_MOD_PATH)),      \
1221                       -b $(INSTALL_MOD_PATH) -r)              \
1222                       $(KERNELRELEASE);                       \
1223                    fi
1224
1225 PHONY += _emodinst_post
1226 _emodinst_post: _emodinst_
1227         $(call cmd,depmod)
1228
1229 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1230
1231 PHONY += $(clean-dirs) clean
1232 $(clean-dirs):
1233         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1234
1235 clean:  rm-dirs := $(MODVERDIR)
1236 clean: $(clean-dirs)
1237         $(call cmd,rmdirs)
1238         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1239                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1240                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1241                 -type f -print | xargs rm -f
1242
1243 help:
1244         @echo  '  Building external modules.'
1245         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1246         @echo  ''
1247         @echo  '  modules         - default target, build the module(s)'
1248         @echo  '  modules_install - install the module'
1249         @echo  '  clean           - remove generated files in module directory only'
1250         @echo  ''
1251
1252 # Dummies...
1253 PHONY += prepare scripts
1254 prepare: ;
1255 scripts: ;
1256 endif # KBUILD_EXTMOD
1257
1258 # Generate tags for editors
1259 # ---------------------------------------------------------------------------
1260
1261 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1262 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1263 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1264
1265 ifeq ($(src),$(obj))
1266 __srctree =
1267 else
1268 __srctree = $(srctree)/
1269 endif
1270
1271 ifeq ($(ALLSOURCE_ARCHS),)
1272 ifeq ($(ARCH),um)
1273 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1274 else
1275 ALLINCLUDE_ARCHS := $(ARCH)
1276 endif
1277 else
1278 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1279 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1280 endif
1281
1282 ALLSOURCE_ARCHS := $(ARCH)
1283
1284 define find-sources
1285         ( find $(__srctree) $(RCS_FIND_IGNORE) \
1286                \( -name include -o -name arch \) -prune -o \
1287                -name $1 -print; \
1288           for ARCH in $(ALLSOURCE_ARCHS) ; do \
1289                find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1290                     -name $1 -print; \
1291           done ; \
1292           find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1293                -name $1 -print; \
1294           find $(__srctree)include $(RCS_FIND_IGNORE) \
1295                \( -name config -o -name 'asm-*' \) -prune \
1296                -o -name $1 -print; \
1297           for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1298                find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1299                     -name $1 -print; \
1300           done ; \
1301           find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1302                -name $1 -print )
1303 endef
1304
1305 define all-sources
1306         $(call find-sources,'*.[chS]')
1307 endef
1308 define all-kconfigs
1309         $(call find-sources,'Kconfig*')
1310 endef
1311 define all-defconfigs
1312         $(call find-sources,'defconfig')
1313 endef
1314
1315 define xtags
1316         if $1 --version 2>&1 | grep -iq exuberant; then \
1317             $(all-sources) | xargs $1 -a \
1318                 -I __initdata,__exitdata,__acquires,__releases \
1319                 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1320                 --extra=+f --c-kinds=+px \
1321                 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1322             $(all-kconfigs) | xargs $1 -a \
1323                 --langdef=kconfig \
1324                 --language-force=kconfig \
1325                 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1326             $(all-defconfigs) | xargs -r $1 -a \
1327                 --langdef=dotconfig \
1328                 --language-force=dotconfig \
1329                 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1330         elif $1 --version 2>&1 | grep -iq emacs; then \
1331             $(all-sources) | xargs $1 -a; \
1332             $(all-kconfigs) | xargs $1 -a \
1333                 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1334             $(all-defconfigs) | xargs -r $1 -a \
1335                 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1336         else \
1337             $(all-sources) | xargs $1 -a; \
1338         fi
1339 endef
1340
1341 quiet_cmd_cscope-file = FILELST cscope.files
1342       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1343
1344 quiet_cmd_cscope = MAKE    cscope.out
1345       cmd_cscope = cscope -b
1346
1347 cscope: FORCE
1348         $(call cmd,cscope-file)
1349         $(call cmd,cscope)
1350
1351 quiet_cmd_TAGS = MAKE   $@
1352 define cmd_TAGS
1353         rm -f $@; \
1354         $(call xtags,etags)
1355 endef
1356
1357 TAGS: FORCE
1358         $(call cmd,TAGS)
1359
1360 quiet_cmd_tags = MAKE   $@
1361 define cmd_tags
1362         rm -f $@; \
1363         $(call xtags,ctags)
1364 endef
1365
1366 tags: FORCE
1367         $(call cmd,tags)
1368
1369
1370 # Scripts to check various things for consistency
1371 # ---------------------------------------------------------------------------
1372
1373 includecheck:
1374         find * $(RCS_FIND_IGNORE) \
1375                 -name '*.[hcS]' -type f -print | sort \
1376                 | xargs $(PERL) -w scripts/checkincludes.pl
1377
1378 versioncheck:
1379         find * $(RCS_FIND_IGNORE) \
1380                 -name '*.[hcS]' -type f -print | sort \
1381                 | xargs $(PERL) -w scripts/checkversion.pl
1382
1383 namespacecheck:
1384         $(PERL) $(srctree)/scripts/namespace.pl
1385
1386 endif #ifeq ($(config-targets),1)
1387 endif #ifeq ($(mixed-targets),1)
1388
1389 PHONY += checkstack kernelrelease kernelversion
1390
1391 # Use $(SUBARCH) here instead of $(ARCH) so that this works for UML.
1392 # In the UML case, $(SUBARCH) is the name of the underlying
1393 # architecture, while for all other arches, it is the same as $(ARCH).
1394 checkstack:
1395         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1396         $(PERL) $(src)/scripts/checkstack.pl $(SUBARCH)
1397
1398 kernelrelease:
1399         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1400         $(error kernelrelease not valid - run 'make prepare' to update it))
1401 kernelversion:
1402         @echo $(KERNELVERSION)
1403
1404 # Single targets
1405 # ---------------------------------------------------------------------------
1406 # Single targets are compatible with:
1407 # - build whith mixed source and output
1408 # - build with separate output dir 'make O=...'
1409 # - external modules
1410 #
1411 #  target-dir => where to store outputfile
1412 #  build-dir  => directory in kernel source tree to use
1413
1414 ifeq ($(KBUILD_EXTMOD),)
1415         build-dir  = $(patsubst %/,%,$(dir $@))
1416         target-dir = $(dir $@)
1417 else
1418         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1419         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1420         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1421 endif
1422
1423 %.s: %.c prepare scripts FORCE
1424         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1425 %.i: %.c prepare scripts FORCE
1426         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1427 %.o: %.c prepare scripts FORCE
1428         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1429 %.lst: %.c prepare scripts FORCE
1430         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1431 %.s: %.S prepare scripts FORCE
1432         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1433 %.o: %.S prepare scripts FORCE
1434         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1435 %.symtypes: %.c prepare scripts FORCE
1436         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1437
1438 # Modules
1439 / %/: prepare scripts FORCE
1440         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1441         $(build)=$(build-dir)
1442 %.ko: prepare scripts FORCE
1443         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1444         $(build)=$(build-dir) $(@:.ko=.o)
1445         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1446
1447 # FIXME Should go into a make.lib or something
1448 # ===========================================================================
1449
1450 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1451       cmd_rmdirs = rm -rf $(rm-dirs)
1452
1453 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1454       cmd_rmfiles = rm -f $(rm-files)
1455
1456
1457 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1458           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1459           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1460
1461 quiet_cmd_as_o_S = AS      $@
1462 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1463
1464 # read all saved command lines
1465
1466 targets := $(wildcard $(sort $(targets)))
1467 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1468
1469 ifneq ($(cmd_files),)
1470   $(cmd_files): ;       # Do not try to update included dependency files
1471   include $(cmd_files)
1472 endif
1473
1474 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1475 # Usage:
1476 # $(Q)$(MAKE) $(clean)=dir
1477 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1478
1479 endif   # skip-makefile
1480
1481 PHONY += FORCE
1482 FORCE:
1483
1484
1485 # Declare the contents of the .PHONY variable as phony.  We keep that
1486 # information in a variable se we can use it in if_changed and friends.
1487 .PHONY: $(PHONY)