Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 32
   4 EXTRAVERSION = -rc4-mm1
   5 NAME = Man-Eating Seals of Antiquity
   6
   7 # *DOCUMENTATION*
   8 # To see a list of typical targets execute "make help"
   9 # More info can be located in ./README
  10 # Comments in this file are targeted only to the developer, do not
  11 # expect to learn how to build the kernel reading this file.
  12
  13 # Do not:
  14 # o  use make's built-in rules and variables
  15 #    (this increases performance and avoids hard-to-debug behaviour);
  16 # o  print "Entering directory ...";
  17 MAKEFLAGS += -rR --no-print-directory
  18
  19 # We are using a recursive build, so we need to do a little thinking
  20 # to get the ordering right.
  21 #
  22 # Most importantly: sub-Makefiles should only ever modify files in
  23 # their own directory. If in some directory we have a dependency on
  24 # a file in another dir (which doesn't happen often, but it's often
  25 # unavoidable when linking the built-in.o targets which finally
  26 # turn into vmlinux), we will call a sub make in that other dir, and
  27 # after that we are sure that everything which is in that other dir
  28 # is now up to date.
  29 #
  30 # The only cases where we need to modify files which have global
  31 # effects are thus separated out and done before the recursive
  32 # descending is started. They are now explicitly listed as the
  33 # prepare rule.
  34
  35 # To put more focus on warnings, be less verbose as default
  36 # Use 'make V=1' to see the full commands
  37
  38 ifeq ("$(origin V)", "command line")
  39   KBUILD_VERBOSE = $(V)
  40 endif
  41 ifndef KBUILD_VERBOSE
  42   KBUILD_VERBOSE = 0
  43 endif
  44
  45 # Call a source code checker (by default, "sparse") as part of the
  46 # C compilation.
  47 #
  48 # Use 'make C=1' to enable checking of only re-compiled files.
  49 # Use 'make C=2' to enable checking of *all* source files, regardless
  50 # of whether they are re-compiled or not.
  51 #
  52 # See the file "Documentation/sparse.txt" for more details, including
  53 # where to get the "sparse" utility.
  54
  55 ifeq ("$(origin C)", "command line")
  56   KBUILD_CHECKSRC = $(C)
  57 endif
  58 ifndef KBUILD_CHECKSRC
  59   KBUILD_CHECKSRC = 0
  60 endif
  61
  62 # Use make M=dir to specify directory of external module to build
  63 # Old syntax make ... SUBDIRS=$PWD is still supported
  64 # Setting the environment variable KBUILD_EXTMOD take precedence
  65 ifdef SUBDIRS
  66   KBUILD_EXTMOD ?= $(SUBDIRS)
  67 endif
  68
  69 ifeq ("$(origin M)", "command line")
  70   KBUILD_EXTMOD := $(M)
  71 endif
  72
  73 # kbuild supports saving output files in a separate directory.
  74 # To locate output files in a separate directory two syntaxes are supported.
  75 # In both cases the working directory must be the root of the kernel src.
  76 # 1) O=
  77 # Use "make O=dir/to/store/output/files/"
  78 #
  79 # 2) Set KBUILD_OUTPUT
  80 # Set the environment variable KBUILD_OUTPUT to point to the directory
  81 # where the output files shall be placed.
  82 # export KBUILD_OUTPUT=dir/to/store/output/files/
  83 # make
  84 #
  85 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  86 # variable.
  87
  88
  89 # KBUILD_SRC is set on invocation of make in OBJ directory
  90 # KBUILD_SRC is not intended to be used by the regular user (for now)
  91 ifeq ($(KBUILD_SRC),)
  92
  93 # OK, Make called in directory where kernel src resides
  94 # Do we want to locate output files in a separate directory?
  95 ifeq ("$(origin O)", "command line")
  96   KBUILD_OUTPUT := $(O)
  97 endif
  98
  99 # That's our default target when none is given on the command line
 100 PHONY := _all
 101 _all:
 102
 103 # Cancel implicit rules on top Makefile
 104 $(CURDIR)/Makefile Makefile: ;
 105
 106 ifneq ($(KBUILD_OUTPUT),)
 107 # Invoke a second make in the output directory, passing relevant variables
 108 # check that the output directory actually exists
 109 saved-output := $(KBUILD_OUTPUT)
 110 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 111 $(if $(KBUILD_OUTPUT),, \
 112      $(error output directory "$(saved-output)" does not exist))
 113
 114 PHONY += $(MAKECMDGOALS) sub-make
 115
 116 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
 117         $(Q)@:
 118
 119 sub-make: FORCE
 120         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 121         KBUILD_SRC=$(CURDIR) \
 122         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
 123         $(filter-out _all sub-make,$(MAKECMDGOALS))
 124
 125 # Leave processing to above invocation of make
 126 skip-makefile := 1
 127 endif # ifneq ($(KBUILD_OUTPUT),)
 128 endif # ifeq ($(KBUILD_SRC),)
 129
 130 # We process the rest of the Makefile if this is the final invocation of make
 131 ifeq ($(skip-makefile),)
 132
 133 # If building an external module we do not care about the all: rule
 134 # but instead _all depend on modules
 135 PHONY += all
 136 ifeq ($(KBUILD_EXTMOD),)
 137 _all: all
 138 else
 139 _all: modules
 140 endif
 141
 142 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 143 objtree         := $(CURDIR)
 144 src             := $(srctree)
 145 obj             := $(objtree)
 146
 147 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 148
 149 export srctree objtree VPATH
 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 := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 159                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 160                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 161                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 162                                   -e s/sh[234].*/sh/ )
 163
 164 # Cross compiling and selecting different set of gcc/bin-utils
 165 # ---------------------------------------------------------------------------
 166 #
 167 # When performing cross compilation for other architectures ARCH shall be set
 168 # to the target architecture. (See arch/* for the possibilities).
 169 # ARCH can be set during invocation of make:
 170 # make ARCH=ia64
 171 # Another way is to have ARCH set in the environment.
 172 # The default ARCH is the host where make is executed.
 173
 174 # CROSS_COMPILE specify the prefix used for all executables used
 175 # during compilation. Only gcc and related bin-utils executables
 176 # are prefixed with $(CROSS_COMPILE).
 177 # CROSS_COMPILE can be set on the command line
 178 # make CROSS_COMPILE=ia64-linux-
 179 # Alternatively CROSS_COMPILE can be set in the environment.
 180 # A third alternative is to store a setting in .config so that plain
 181 # "make" in the configured kernel build directory always uses that.
 182 # Default value for CROSS_COMPILE is not to prefix executables
 183 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 184 export KBUILD_BUILDHOST := $(SUBARCH)
 185 ARCH            ?= $(SUBARCH)
 186 CROSS_COMPILE   ?=
 187 CROSS_COMPILE   ?= $(CONFIG_CROSS_COMPILE:"%"=%)
 188
 189 # Architecture as present in compile.h
 190 UTS_MACHINE     := $(ARCH)
 191 SRCARCH         := $(ARCH)
 192
 193 # Additional ARCH settings for x86
 194 ifeq ($(ARCH),i386)
 195         SRCARCH := x86
 196 endif
 197 ifeq ($(ARCH),x86_64)
 198         SRCARCH := x86
 199 endif
 200
 201 # Additional ARCH settings for sparc
 202 ifeq ($(ARCH),sparc64)
 203        SRCARCH := sparc
 204 endif
 205
 206 # Additional ARCH settings for sh
 207 ifeq ($(ARCH),sh64)
 208        SRCARCH := sh
 209 endif
 210
 211 # Where to locate arch specific headers
 212 hdr-arch  := $(SRCARCH)
 213
 214 ifeq ($(ARCH),m68knommu)
 215        hdr-arch  := m68k
 216 endif
 217
 218 KCONFIG_CONFIG  ?= .config
 219
 220 # SHELL used by kbuild
 221 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 222           else if [ -x /bin/bash ]; then echo /bin/bash; \
 223           else echo sh; fi ; fi)
 224
 225 HOSTCC       = gcc
 226 HOSTCXX      = g++
 227 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 228 HOSTCXXFLAGS = -O2
 229
 230 # Decide whether to build built-in, modular, or both.
 231 # Normally, just do built-in.
 232
 233 KBUILD_MODULES :=
 234 KBUILD_BUILTIN := 1
 235
 236 #       If we have only "make modules", don't compile built-in objects.
 237 #       When we're building modules with modversions, we need to consider
 238 #       the built-in objects during the descend as well, in order to
 239 #       make sure the checksums are up to date before we record them.
 240
 241 ifeq ($(MAKECMDGOALS),modules)
 242   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 243 endif
 244
 245 #       If we have "make <whatever> modules", compile modules
 246 #       in addition to whatever we do anyway.
 247 #       Just "make" or "make all" shall build modules as well
 248
 249 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 250   KBUILD_MODULES := 1
 251 endif
 252
 253 ifeq ($(MAKECMDGOALS),)
 254   KBUILD_MODULES := 1
 255 endif
 256
 257 export KBUILD_MODULES KBUILD_BUILTIN
 258 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 259
 260 # Beautify output
 261 # ---------------------------------------------------------------------------
 262 #
 263 # Normally, we echo the whole command before executing it. By making
 264 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 265 # $(quiet) to choose other forms of output instead, e.g.
 266 #
 267 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 268 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 269 #
 270 # If $(quiet) is empty, the whole command will be printed.
 271 # If it is set to "quiet_", only the short version will be printed.
 272 # If it is set to "silent_", nothing will be printed at all, since
 273 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 274 #
 275 # A simple variant is to prefix commands with $(Q) - that's useful
 276 # for commands that shall be hidden in non-verbose mode.
 277 #
 278 #       $(Q)ln $@ :<
 279 #
 280 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 281 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 282
 283 ifeq ($(KBUILD_VERBOSE),1)
 284   quiet =
 285   Q =
 286 else
 287   quiet=quiet_
 288   Q = @
 289 endif
 290
 291 # If the user is running make -s (silent mode), suppress echoing of
 292 # commands
 293
 294 ifneq ($(findstring s,$(MAKEFLAGS)),)
 295   quiet=silent_
 296 endif
 297
 298 export quiet Q KBUILD_VERBOSE
 299
 300
 301 # Look for make include files relative to root of kernel src
 302 MAKEFLAGS += --include-dir=$(srctree)
 303
 304 # We need some generic definitions (do not try to remake the file).
 305 $(srctree)/scripts/Kbuild.include: ;
 306 include $(srctree)/scripts/Kbuild.include
 307
 308 # Make variables (CC, etc...)
 309
 310 AS              = $(CROSS_COMPILE)as
 311 LD              = $(CROSS_COMPILE)ld
 312 CC              = $(CROSS_COMPILE)gcc
 313 CPP             = $(CC) -E
 314 AR              = $(CROSS_COMPILE)ar
 315 NM              = $(CROSS_COMPILE)nm
 316 STRIP           = $(CROSS_COMPILE)strip
 317 OBJCOPY         = $(CROSS_COMPILE)objcopy
 318 OBJDUMP         = $(CROSS_COMPILE)objdump
 319 AWK             = awk
 320 GENKSYMS        = scripts/genksyms/genksyms
 321 INSTALLKERNEL  := installkernel
 322 DEPMOD          = /sbin/depmod
 323 KALLSYMS        = scripts/kallsyms
 324 PERL            = perl
 325 CHECK           = sparse
 326
 327 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 328                   -Wbitwise -Wno-return-void $(CF)
 329 MODFLAGS        = -DMODULE
 330 CFLAGS_MODULE   = $(MODFLAGS)
 331 AFLAGS_MODULE   = $(MODFLAGS)
 332 LDFLAGS_MODULE  = -T $(srctree)/scripts/module-common.lds
 333 CFLAGS_KERNEL   =
 334 AFLAGS_KERNEL   =
 335 CFLAGS_GCOV     = -fprofile-arcs -ftest-coverage
 336
 337
 338 # Use LINUXINCLUDE when you must reference the include/ directory.
 339 # Needed to be compatible with the O= option
 340 LINUXINCLUDE    := -Iinclude \
 341                    $(if $(KBUILD_SRC), -I$(srctree)/include)           \
 342                    -I$(srctree)/arch/$(hdr-arch)/include               \
 343                    -include include/generated/autoconf.h
 344
 345 KBUILD_CPPFLAGS := -D__KERNEL__
 346
 347 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 348                    -fno-strict-aliasing -fno-common \
 349                    -Werror-implicit-function-declaration \
 350                    -Wno-format-security \
 351                    -fno-delete-null-pointer-checks
 352 KBUILD_AFLAGS   := -D__ASSEMBLY__
 353
 354 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 355 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 356 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 357
 358 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 359 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 360 export CPP AR NM STRIP OBJCOPY OBJDUMP
 361 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
 362 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 363
 364 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 365 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
 366 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 367
 368 # When compiling out-of-tree modules, put MODVERDIR in the module
 369 # tree rather than in the kernel tree. The kernel tree might
 370 # even be read-only.
 371 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 372
 373 # Files to ignore in find ... statements
 374
 375 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
 376 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 377
 378 # ===========================================================================
 379 # Rules shared between *config targets and build targets
 380
 381 # Basic helpers built in scripts/
 382 PHONY += scripts_basic
 383 scripts_basic:
 384         $(Q)$(MAKE) $(build)=scripts/basic
 385
 386 # To avoid any implicit rule to kick in, define an empty command.
 387 scripts/basic/%: scripts_basic ;
 388
 389 PHONY += outputmakefile
 390 # outputmakefile generates a Makefile in the output directory, if using a
 391 # separate output directory. This allows convenient use of make in the
 392 # output directory.
 393 outputmakefile:
 394 ifneq ($(KBUILD_SRC),)
 395         $(Q)ln -fsn $(srctree) source
 396         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 397             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 398 endif
 399
 400 # To make sure we do not include .config for any of the *config targets
 401 # catch them early, and hand them over to scripts/kconfig/Makefile
 402 # It is allowed to specify more targets when calling make, including
 403 # mixing *config targets and build targets.
 404 # For example 'make oldconfig all'.
 405 # Detect when mixed targets is specified, and make a second invocation
 406 # of make so .config is not included in this case either (for *config).
 407
 408 no-dot-config-targets := clean mrproper distclean \
 409                          cscope TAGS tags help %docs check% \
 410                          include/linux/version.h headers_% \
 411                          kernelrelease kernelversion
 412
 413 config-targets := 0
 414 mixed-targets  := 0
 415 dot-config     := 1
 416
 417 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 418         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 419                 dot-config := 0
 420         endif
 421 endif
 422
 423 ifeq ($(KBUILD_EXTMOD),)
 424         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 425                 config-targets := 1
 426                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 427                         mixed-targets := 1
 428                 endif
 429         endif
 430 endif
 431
 432 ifeq ($(mixed-targets),1)
 433 # ===========================================================================
 434 # We're called with mixed targets (*config and build targets).
 435 # Handle them one by one.
 436
 437 %:: FORCE
 438         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 439
 440 else
 441 ifeq ($(config-targets),1)
 442 # ===========================================================================
 443 # *config targets only - make sure prerequisites are updated, and descend
 444 # in scripts/kconfig to make the *config target
 445
 446 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 447 # KBUILD_DEFCONFIG may point out an alternative default configuration
 448 # used for 'make defconfig'
 449 include $(srctree)/arch/$(SRCARCH)/Makefile
 450 export KBUILD_DEFCONFIG KBUILD_KCONFIG
 451
 452 config: scripts_basic outputmakefile FORCE
 453         $(Q)mkdir -p include/linux include/config
 454         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 455
 456 %config: scripts_basic outputmakefile FORCE
 457         $(Q)mkdir -p include/linux include/config
 458         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 459
 460 else
 461 # ===========================================================================
 462 # Build targets only - this includes vmlinux, arch specific targets, clean
 463 # targets and others. In general all targets except *config targets.
 464
 465 ifeq ($(KBUILD_EXTMOD),)
 466 # Additional helpers built in scripts/
 467 # Carefully list dependencies so we do not try to build scripts twice
 468 # in parallel
 469 PHONY += scripts
 470 scripts: scripts_basic include/config/auto.conf
 471         $(Q)$(MAKE) $(build)=$(@)
 472
 473 # Objects we will link into vmlinux / subdirs we need to visit
 474 init-y          := init/
 475 drivers-y       := drivers/ sound/ firmware/
 476 net-y           := net/
 477 libs-y          := lib/
 478 core-y          := usr/
 479 endif # KBUILD_EXTMOD
 480
 481 ifeq ($(dot-config),1)
 482 # Read in config
 483 -include include/config/auto.conf
 484
 485 ifeq ($(KBUILD_EXTMOD),)
 486 # Read in dependencies to all Kconfig* files, make sure to run
 487 # oldconfig if changes are detected.
 488 -include include/config/auto.conf.cmd
 489
 490 # To avoid any implicit rule to kick in, define an empty command
 491 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 492
 493 # If .config is newer than include/config/auto.conf, someone tinkered
 494 # with it and forgot to run make oldconfig.
 495 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 496 # we execute the config step to be sure to catch updated Kconfig files
 497 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 498         $(Q)mkdir -p include/generated
 499         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 500 else
 501 # external modules needs include/generated/autoconf.h and include/config/auto.conf
 502 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 503 PHONY += include/config/auto.conf
 504
 505 include/config/auto.conf:
 506         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
 507         echo;                                                           \
 508         echo "  ERROR: Kernel configuration is invalid.";               \
 509         echo "         include/generated/autoconf.h or $@ are missing.";\
 510         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 511         echo;                                                           \
 512         /bin/false)
 513
 514 endif # KBUILD_EXTMOD
 515
 516 else
 517 # Dummy target needed, because used as prerequisite
 518 include/config/auto.conf: ;
 519 endif # $(dot-config)
 520
 521 # The all: target is the default when no target is given on the
 522 # command line.
 523 # This allow a user to issue only 'make' to build a kernel including modules
 524 # Defaults vmlinux but it is usually overridden in the arch makefile
 525 all: vmlinux
 526
 527 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 528 KBUILD_CFLAGS   += -Os
 529 else
 530 KBUILD_CFLAGS   += -O2
 531 endif
 532
 533 include $(srctree)/arch/$(SRCARCH)/Makefile
 534
 535 ifneq ($(CONFIG_FRAME_WARN),0)
 536 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 537 endif
 538
 539 # Force gcc to behave correct even for buggy distributions
 540 ifndef CONFIG_CC_STACKPROTECTOR
 541 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 542 endif
 543
 544 ifdef CONFIG_FRAME_POINTER
 545 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 546 else
 547 KBUILD_CFLAGS   += -fomit-frame-pointer
 548 endif
 549
 550 ifdef CONFIG_DEBUG_INFO
 551 KBUILD_CFLAGS   += -g
 552 KBUILD_AFLAGS   += -gdwarf-2
 553 endif
 554
 555 ifdef CONFIG_FUNCTION_TRACER
 556 KBUILD_CFLAGS   += -pg
 557 endif
 558
 559 # We trigger additional mismatches with less inlining
 560 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 561 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 562 endif
 563
 564 # arch Makefile may override CC so keep this after arch Makefile is included
 565 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 566 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 567
 568 # warn about C99 declaration after statement
 569 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 570
 571 # disable pointer signed / unsigned warnings in gcc 4.0
 572 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 573
 574 # disable invalid "can't wrap" optimizations for signed / pointers
 575 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
 576
 577 # revert to pre-gcc-4.4 behaviour of .eh_frame
 578 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 579
 580 # conserve stack if available
 581 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
 582
 583 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
 584 # But warn user when we do so
 585 warn-assign = \
 586 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
 587
 588 ifneq ($(KCPPFLAGS),)
 589         $(call warn-assign,CPPFLAGS)
 590         KBUILD_CPPFLAGS += $(KCPPFLAGS)
 591 endif
 592 ifneq ($(KAFLAGS),)
 593         $(call warn-assign,AFLAGS)
 594         KBUILD_AFLAGS += $(KAFLAGS)
 595 endif
 596 ifneq ($(KCFLAGS),)
 597         $(call warn-assign,CFLAGS)
 598         KBUILD_CFLAGS += $(KCFLAGS)
 599 endif
 600
 601 # Use --build-id when available.
 602 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 603                               $(call cc-ldoption, -Wl$(comma)--build-id,))
 604 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 605 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 606
 607 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
 608 LDFLAGS_vmlinux += $(call ld-option, -X,)
 609 endif
 610
 611 # Default kernel image to build when no specific target is given.
 612 # KBUILD_IMAGE may be overruled on the command line or
 613 # set in the environment
 614 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 615 # this default value
 616 export KBUILD_IMAGE ?= vmlinux
 617
 618 #
 619 # INSTALL_PATH specifies where to place the updated kernel and system map
 620 # images. Default is /boot, but you can set it to other values
 621 export  INSTALL_PATH ?= /boot
 622
 623 #
 624 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 625 # relocations required by build roots.  This is not defined in the
 626 # makefile but the argument can be passed to make if needed.
 627 #
 628
 629 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 630 export MODLIB
 631
 632 #
 633 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 634 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 635 #  the default option --strip-debug will be used.  Otherwise,
 636 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 637
 638 ifdef INSTALL_MOD_STRIP
 639 ifeq ($(INSTALL_MOD_STRIP),1)
 640 mod_strip_cmd = $(STRIP) --strip-debug
 641 else
 642 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 643 endif # INSTALL_MOD_STRIP=1
 644 else
 645 mod_strip_cmd = true
 646 endif # INSTALL_MOD_STRIP
 647 export mod_strip_cmd
 648
 649
 650 ifeq ($(KBUILD_EXTMOD),)
 651 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 652
 653 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 654                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 655                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 656
 657 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 658                      $(init-n) $(init-) \
 659                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 660                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 661
 662 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 663 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 664 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 665 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 666 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 667 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 668 libs-y          := $(libs-y1) $(libs-y2)
 669
 670 # Build vmlinux
 671 # ---------------------------------------------------------------------------
 672 # vmlinux is built from the objects selected by $(vmlinux-init) and
 673 # $(vmlinux-main). Most are built-in.o files from top-level directories
 674 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 675 # Ordering when linking is important, and $(vmlinux-init) must be first.
 676 #
 677 # vmlinux
 678 #   ^
 679 #   |
 680 #   +-< $(vmlinux-init)
 681 #   |   +--< init/version.o + more
 682 #   |
 683 #   +--< $(vmlinux-main)
 684 #   |    +--< driver/built-in.o mm/built-in.o + more
 685 #   |
 686 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 687 #
 688 # vmlinux version (uname -v) cannot be updated during normal
 689 # descending-into-subdirs phase since we do not yet know if we need to
 690 # update vmlinux.
 691 # Therefore this step is delayed until just before final link of vmlinux -
 692 # except in the kallsyms case where it is done just before adding the
 693 # symbols to the kernel.
 694 #
 695 # System.map is generated to document addresses of all kernel symbols
 696
 697 vmlinux-init := $(head-y) $(init-y)
 698 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 699 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 700 vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
 701 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 702
 703 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 704 # May be overridden by arch/$(ARCH)/Makefile
 705 quiet_cmd_vmlinux__ ?= LD      $@
 706       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 707       -T $(vmlinux-lds) $(vmlinux-init)                          \
 708       --start-group $(vmlinux-main) --end-group                  \
 709       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
 710
 711 # Generate new vmlinux version
 712 quiet_cmd_vmlinux_version = GEN     .version
 713       cmd_vmlinux_version = set -e;                     \
 714         if [ ! -r .version ]; then                      \
 715           rm -f .version;                               \
 716           echo 1 >.version;                             \
 717         else                                            \
 718           mv .version .old_version;                     \
 719           expr 0$$(cat .old_version) + 1 >.version;     \
 720         fi;                                             \
 721         $(MAKE) $(build)=init
 722
 723 # Generate System.map
 724 quiet_cmd_sysmap = SYSMAP
 725       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 726
 727 # Link of vmlinux
 728 # If CONFIG_KALLSYMS is set .version is already updated
 729 # Generate System.map and verify that the content is consistent
 730 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 731 # First command is ':' to allow us to use + in front of the rule
 732 define rule_vmlinux__
 733         :
 734         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 735
 736         $(call cmd,vmlinux__)
 737         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 738
 739         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 740           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 741         $(cmd_sysmap) $@ System.map;                                         \
 742         if [ $$? -ne 0 ]; then                                               \
 743                 rm -f $@;                                                    \
 744                 /bin/false;                                                  \
 745         fi;
 746         $(verify_kallsyms)
 747 endef
 748
 749
 750 ifdef CONFIG_KALLSYMS
 751 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 752 # It's a three stage process:
 753 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 754 #   empty
 755 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 756 #   the right size - vmlinux version (uname -v) is updated during this step
 757 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 758 #   but due to the added section, some addresses have shifted.
 759 #   From here, we generate a correct .tmp_kallsyms2.o
 760 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 761 # o Verify that the System.map from vmlinux matches the map from
 762 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 763 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 764 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 765 #   temporary bypass to allow the kernel to be built while the
 766 #   maintainers work out what went wrong with kallsyms.
 767
 768 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 769 last_kallsyms := 3
 770 else
 771 last_kallsyms := 2
 772 endif
 773
 774 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 775
 776 define verify_kallsyms
 777         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 778           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 779           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 780         $(Q)cmp -s System.map .tmp_System.map ||                             \
 781                 (echo Inconsistent kallsyms data;                            \
 782                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 783                  rm .tmp_kallsyms* ; /bin/false )
 784 endef
 785
 786 # Update vmlinux version before link
 787 # Use + in front of this rule to silent warning about make -j1
 788 # First command is ':' to allow us to use + in front of this rule
 789 cmd_ksym_ld = $(cmd_vmlinux__)
 790 define rule_ksym_ld
 791         :
 792         +$(call cmd,vmlinux_version)
 793         $(call cmd,vmlinux__)
 794         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 795 endef
 796
 797 # Generate .S file with all kernel symbols
 798 quiet_cmd_kallsyms = KSYM    $@
 799       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 800                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 801
 802 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 803         $(call if_changed_dep,as_o_S)
 804
 805 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 806         $(call cmd,kallsyms)
 807
 808 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 809 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 810         $(call if_changed_rule,ksym_ld)
 811
 812 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 813         $(call if_changed,vmlinux__)
 814
 815 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 816         $(call if_changed,vmlinux__)
 817
 818 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 819 $(KALLSYMS): scripts ;
 820
 821 # Generate some data for debugging strange kallsyms problems
 822 debug_kallsyms: .tmp_map$(last_kallsyms)
 823
 824 .tmp_map%: .tmp_vmlinux% FORCE
 825         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 826
 827 .tmp_map3: .tmp_map2
 828
 829 .tmp_map2: .tmp_map1
 830
 831 endif # ifdef CONFIG_KALLSYMS
 832
 833 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 834 # relevant sections renamed as per the linker script.
 835 quiet_cmd_vmlinux-modpost = LD      $@
 836       cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 837          $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
 838          $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 839 define rule_vmlinux-modpost
 840         :
 841         +$(call cmd,vmlinux-modpost)
 842         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 843         $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
 844 endef
 845
 846 # vmlinux image - including updated kernel symbols
 847 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
 848 ifdef CONFIG_HEADERS_CHECK
 849         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 850 endif
 851 ifdef CONFIG_SAMPLES
 852         $(Q)$(MAKE) $(build)=samples
 853 endif
 854 ifdef CONFIG_BUILD_DOCSRC
 855         $(Q)$(MAKE) $(build)=Documentation
 856 endif
 857         $(call vmlinux-modpost)
 858         $(call if_changed_rule,vmlinux__)
 859         $(Q)rm -f .old_version
 860
 861 # build vmlinux.o first to catch section mismatch errors early
 862 ifdef CONFIG_KALLSYMS
 863 .tmp_vmlinux1: vmlinux.o
 864 endif
 865
 866 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
 867 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
 868         $(call if_changed_rule,vmlinux-modpost)
 869
 870 # The actual objects are generated when descending,
 871 # make sure no implicit rule kicks in
 872 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 873
 874 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 875 # Preset locale variables to speed up the build process. Limit locale
 876 # tweaks to this spot to avoid wrong language settings when running
 877 # make menuconfig etc.
 878 # Error messages still appears in the original language
 879
 880 PHONY += $(vmlinux-dirs)
 881 $(vmlinux-dirs): prepare scripts
 882         $(Q)$(MAKE) $(build)=$@
 883 ifdef CONFIG_MODULES
 884         $(Q)$(MAKE) $(modbuiltin)=$@
 885 endif
 886
 887 # Build the kernel release string
 888 #
 889 # The KERNELRELEASE value built here is stored in the file
 890 # include/config/kernel.release, and is used when executing several
 891 # make targets, such as "make install" or "make modules_install."
 892 #
 893 # The eventual kernel release string consists of the following fields,
 894 # shown in a hierarchical format to show how smaller parts are concatenated
 895 # to form the larger and final value, with values coming from places like
 896 # the Makefile, kernel config options, make command line options and/or
 897 # SCM tag information.
 898 #
 899 #       $(KERNELVERSION)
 900 #         $(VERSION)                    eg, 2
 901 #         $(PATCHLEVEL)                 eg, 6
 902 #         $(SUBLEVEL)                   eg, 18
 903 #         $(EXTRAVERSION)               eg, -rc6
 904 #       $(localver-full)
 905 #         $(localver)
 906 #           localversion*               (files without backups, containing '~')
 907 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 908 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 909 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 910 #           $(LOCALVERSION)             (from make command line if provided)
 911 #
 912 #  Note how the final $(localver-auto) string is included *only* if the
 913 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 914 # moment, only git is supported but other SCMs can edit the script
 915 # scripts/setlocalversion and add the appropriate checks as needed.
 916
 917 pattern = ".*/localversion[^~]*"
 918 string  = $(shell cat /dev/null \
 919            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 920
 921 localver = $(subst $(space),, $(string) \
 922                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 923
 924 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 925 # and if the SCM is know a tag from the SCM is appended.
 926 # The appended tag is determined by the SCM used.
 927 #
 928 # .scmversion is used when generating rpm packages so we do not loose
 929 # the version information from the SCM when we do the build of the kernel
 930 # from the copied source
 931 ifdef CONFIG_LOCALVERSION_AUTO
 932
 933 ifeq ($(wildcard .scmversion),)
 934         _localver-auto = $(shell $(CONFIG_SHELL) \
 935                          $(srctree)/scripts/setlocalversion $(srctree))
 936 else
 937         _localver-auto = $(shell cat .scmversion 2> /dev/null)
 938 endif
 939
 940         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 941 endif
 942
 943 localver-full = $(localver)$(localver-auto)
 944
 945 # Store (new) KERNELRELASE string in include/config/kernel.release
 946 kernelrelease = $(KERNELVERSION)$(localver-full)
 947 include/config/kernel.release: include/config/auto.conf FORCE
 948         $(Q)rm -f $@
 949         $(Q)echo $(kernelrelease) > $@
 950
 951
 952 # Things we need to do before we recursively start building the kernel
 953 # or the modules are listed in "prepare".
 954 # A multi level approach is used. prepareN is processed before prepareN-1.
 955 # archprepare is used in arch Makefiles when
 956 # version.h and scripts_basic is processed / created.
 957
 958 # Listed in dependency order
 959 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 960
 961 # prepare3 is used to check if we are building in a separate output directory,
 962 # and if so do:
 963 # 1) Check that make has not been executed in the kernel src $(srctree)
 964 prepare3: include/config/kernel.release
 965 ifneq ($(KBUILD_SRC),)
 966         @$(kecho) '  Using $(srctree) as source for kernel'
 967         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 968                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 969                 echo "  in the '$(srctree)' directory.";\
 970                 /bin/false; \
 971         fi;
 972 endif
 973
 974 # prepare2 creates a makefile if using a separate output directory
 975 prepare2: prepare3 outputmakefile
 976
 977 prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
 978                    include/config/auto.conf
 979         $(cmd_crmodverdir)
 980
 981 archprepare: prepare1 scripts_basic
 982
 983 prepare0: archprepare FORCE
 984         $(Q)$(MAKE) $(build)=.
 985         $(Q)$(MAKE) $(build)=. missing-syscalls
 986
 987 # All the preparing..
 988 prepare: prepare0
 989
 990 # Generate some files
 991 # ---------------------------------------------------------------------------
 992
 993 # KERNELRELEASE can change from a few different places, meaning version.h
 994 # needs to be updated, so this check is forced on all builds
 995
 996 uts_len := 64
 997 define filechk_utsrelease.h
 998         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 999           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1000           exit 1;                                                         \
1001         fi;                                                               \
1002         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1003 endef
1004
1005 define filechk_version.h
1006         (echo \#define LINUX_VERSION_CODE $(shell                             \
1007         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
1008         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1009 endef
1010
1011 include/linux/version.h: $(srctree)/Makefile FORCE
1012         $(call filechk,version.h)
1013
1014 include/generated/utsrelease.h: include/config/kernel.release FORCE
1015         $(call filechk,utsrelease.h)
1016
1017 PHONY += headerdep
1018 headerdep:
1019         $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1020
1021 # ---------------------------------------------------------------------------
1022
1023 PHONY += depend dep
1024 depend dep:
1025         @echo '*** Warning: make $@ is unnecessary now.'
1026
1027 # ---------------------------------------------------------------------------
1028 # Firmware install
1029 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1030 export INSTALL_FW_PATH
1031
1032 PHONY += firmware_install
1033 firmware_install: FORCE
1034         @mkdir -p $(objtree)/firmware
1035         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1036
1037 # ---------------------------------------------------------------------------
1038 # Kernel headers
1039
1040 #Default location for installed headers
1041 export INSTALL_HDR_PATH = $(objtree)/usr
1042
1043 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1044 # Find out where the Kbuild file is located to support
1045 # arch/$(ARCH)/include/asm
1046 hdr-dir = $(strip                                                         \
1047           $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1048                arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1049
1050 # If we do an all arch process set dst to asm-$(hdr-arch)
1051 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1052
1053 PHONY += __headers
1054 __headers: include/linux/version.h scripts_basic FORCE
1055         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1056
1057 PHONY += headers_install_all
1058 headers_install_all:
1059         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1060
1061 PHONY += headers_install
1062 headers_install: __headers
1063         $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1064         $(error Headers not exportable for the $(SRCARCH) architecture))
1065         $(Q)$(MAKE) $(hdr-inst)=include
1066         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1067
1068 PHONY += headers_check_all
1069 headers_check_all: headers_install_all
1070         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1071
1072 PHONY += headers_check
1073 headers_check: headers_install
1074         $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1075         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1076
1077 # ---------------------------------------------------------------------------
1078 # Modules
1079
1080 ifdef CONFIG_MODULES
1081
1082 # By default, build modules as well
1083
1084 all: modules
1085
1086 #       Build modules
1087 #
1088 #       A module can be listed more than once in obj-m resulting in
1089 #       duplicate lines in modules.order files.  Those are removed
1090 #       using awk while concatenating to the final file.
1091
1092 PHONY += modules
1093 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1094         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1095         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.builtin) > $(objtree)/modules.builtin
1096         @$(kecho) '  Building modules, stage 2.';
1097         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1098         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1099
1100
1101 # Target to prepare building external modules
1102 PHONY += modules_prepare
1103 modules_prepare: prepare scripts
1104
1105 # Target to install modules
1106 PHONY += modules_install
1107 modules_install: _modinst_ _modinst_post
1108
1109 PHONY += _modinst_
1110 _modinst_:
1111         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1112                 echo "Warning: you may need to install module-init-tools"; \
1113                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1114                 sleep 1; \
1115         fi
1116         @rm -rf $(MODLIB)/kernel
1117         @rm -f $(MODLIB)/source
1118         @mkdir -p $(MODLIB)/kernel
1119         @ln -s $(srctree) $(MODLIB)/source
1120         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1121                 rm -f $(MODLIB)/build ; \
1122                 ln -s $(objtree) $(MODLIB)/build ; \
1123         fi
1124         @cp -f $(objtree)/modules.{order,builtin} $(MODLIB)/
1125         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1126
1127 # This depmod is only for convenience to give the initial
1128 # boot a modules.dep even before / is mounted read-write.  However the
1129 # boot script depmod is the master version.
1130 PHONY += _modinst_post
1131 _modinst_post: _modinst_
1132         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1133         $(call cmd,depmod)
1134
1135 else # CONFIG_MODULES
1136
1137 # Modules not configured
1138 # ---------------------------------------------------------------------------
1139
1140 modules modules_install: FORCE
1141         @echo
1142         @echo "The present kernel configuration has modules disabled."
1143         @echo "Type 'make config' and enable loadable module support."
1144         @echo "Then build a kernel with module support enabled."
1145         @echo
1146         @exit 1
1147
1148 endif # CONFIG_MODULES
1149
1150 ###
1151 # Cleaning is done on three levels.
1152 # make clean     Delete most generated files
1153 #                Leave enough to build external modules
1154 # make mrproper  Delete the current configuration, and all generated files
1155 # make distclean Remove editor backup files, patch leftover files and the like
1156
1157 # Directories & files removed with 'make clean'
1158 CLEAN_DIRS  += $(MODVERDIR)
1159 CLEAN_FILES +=  vmlinux System.map \
1160                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1161
1162 # Directories & files removed with 'make mrproper'
1163 MRPROPER_DIRS  += include/config usr/include include/generated
1164 MRPROPER_FILES += .config .config.old .version .old_version             \
1165                   include/linux/version.h                               \
1166                   Module.symvers Module.markers tags TAGS cscope*
1167
1168 # clean - Delete most, but leave enough to build external modules
1169 #
1170 clean: rm-dirs  := $(CLEAN_DIRS)
1171 clean: rm-files := $(CLEAN_FILES)
1172 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1173
1174 PHONY += $(clean-dirs) clean archclean
1175 $(clean-dirs):
1176         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1177
1178 clean: archclean $(clean-dirs)
1179         $(call cmd,rmdirs)
1180         $(call cmd,rmfiles)
1181         @find . $(RCS_FIND_IGNORE) \
1182                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1183                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1184                 -o -name '*.symtypes' -o -name 'modules.order' \
1185                 -o -name 'modules.builtin' -o -name 'Module.markers' \
1186                 -o -name '.tmp_*.o.*' -o -name '*.gcno' \) \
1187                 -type f -print | xargs rm -f
1188
1189 # mrproper - Delete all generated files, including .config
1190 #
1191 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1192 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1193 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1194
1195 PHONY += $(mrproper-dirs) mrproper archmrproper
1196 $(mrproper-dirs):
1197         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1198
1199 mrproper: clean archmrproper $(mrproper-dirs)
1200         $(call cmd,rmdirs)
1201         $(call cmd,rmfiles)
1202
1203 # distclean
1204 #
1205 PHONY += distclean
1206
1207 distclean: mrproper
1208         @find $(srctree) $(RCS_FIND_IGNORE) \
1209                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1210                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1211                 -o -name '.*.rej' -o -size 0 \
1212                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1213                 -type f -print | xargs rm -f
1214
1215
1216 # Packaging of the kernel to various formats
1217 # ---------------------------------------------------------------------------
1218 # rpm target kept for backward compatibility
1219 package-dir     := $(srctree)/scripts/package
1220
1221 %pkg: include/config/kernel.release FORCE
1222         $(Q)$(MAKE) $(build)=$(package-dir) $@
1223 rpm: include/config/kernel.release FORCE
1224         $(Q)$(MAKE) $(build)=$(package-dir) $@
1225
1226
1227 # Brief documentation of the typical targets used
1228 # ---------------------------------------------------------------------------
1229
1230 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1231 boards := $(notdir $(boards))
1232 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1233 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1234
1235 help:
1236         @echo  'Cleaning targets:'
1237         @echo  '  clean           - Remove most generated files but keep the config and'
1238         @echo  '                    enough build support to build external modules'
1239         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1240         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1241         @echo  ''
1242         @echo  'Configuration targets:'
1243         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1244         @echo  ''
1245         @echo  'Other generic targets:'
1246         @echo  '  all             - Build all targets marked with [*]'
1247         @echo  '* vmlinux         - Build the bare kernel'
1248         @echo  '* modules         - Build all modules'
1249         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1250         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1251         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1252         @echo  '  dir/            - Build all files in dir and below'
1253         @echo  '  dir/file.[ois]  - Build specified target only'
1254         @echo  '  dir/file.ko     - Build module including final link'
1255         @echo  '  modules_prepare - Set up for building external modules'
1256         @echo  '  tags/TAGS       - Generate tags file for editors'
1257         @echo  '  cscope          - Generate cscope index'
1258         @echo  '  kernelrelease   - Output the release version string'
1259         @echo  '  kernelversion   - Output the version stored in Makefile'
1260         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1261          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1262          echo  ''
1263         @echo  'Static analysers'
1264         @echo  '  checkstack      - Generate a list of stack hogs'
1265         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1266         @echo  '  versioncheck    - Sanity check on version.h usage'
1267         @echo  '  includecheck    - Check for duplicate included header files'
1268         @echo  '  export_report   - List the usages of all exported symbols'
1269         @echo  '  headers_check   - Sanity check on exported headers'
1270         @echo  '  headerdep       - Detect inclusion cycles in headers'; \
1271          echo  ''
1272         @echo  'Kernel packaging:'
1273         @$(MAKE) $(build)=$(package-dir) help
1274         @echo  ''
1275         @echo  'Documentation targets:'
1276         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1277         @echo  ''
1278         @echo  'Architecture specific targets ($(SRCARCH)):'
1279         @$(if $(archhelp),$(archhelp),\
1280                 echo '  No architecture specific help defined for $(SRCARCH)')
1281         @echo  ''
1282         @$(if $(boards), \
1283                 $(foreach b, $(boards), \
1284                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1285                 echo '')
1286         @$(if $(board-dirs), \
1287                 $(foreach b, $(board-dirs), \
1288                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1289                 printf "  %-16s - Show all of the above\\n" help-boards; \
1290                 echo '')
1291
1292         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1293         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1294         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1295         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1296         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1297         @echo  ''
1298         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1299         @echo  'For further info see the ./README file'
1300
1301
1302 help-board-dirs := $(addprefix help-,$(board-dirs))
1303
1304 help-boards: $(help-board-dirs)
1305
1306 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1307
1308 $(help-board-dirs): help-%:
1309         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1310         @$(if $(boards-per-dir), \
1311                 $(foreach b, $(boards-per-dir), \
1312                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1313                 echo '')
1314
1315
1316 # Documentation targets
1317 # ---------------------------------------------------------------------------
1318 %docs: scripts_basic FORCE
1319         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1320
1321 else # KBUILD_EXTMOD
1322
1323 ###
1324 # External module support.
1325 # When building external modules the kernel used as basis is considered
1326 # read-only, and no consistency checks are made and the make
1327 # system is not used on the basis kernel. If updates are required
1328 # in the basis kernel ordinary make commands (without M=...) must
1329 # be used.
1330 #
1331 # The following are the only valid targets when building external
1332 # modules.
1333 # make M=dir clean     Delete all automatically generated files
1334 # make M=dir modules   Make all modules in specified dir
1335 # make M=dir           Same as 'make M=dir modules'
1336 # make M=dir modules_install
1337 #                      Install the modules built in the module directory
1338 #                      Assumes install directory is already created
1339
1340 # We are always building modules
1341 KBUILD_MODULES := 1
1342 PHONY += crmodverdir
1343 crmodverdir:
1344         $(cmd_crmodverdir)
1345
1346 PHONY += $(objtree)/Module.symvers
1347 $(objtree)/Module.symvers:
1348         @test -e $(objtree)/Module.symvers || ( \
1349         echo; \
1350         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1351         echo "           is missing; modules will have no dependencies and modversions."; \
1352         echo )
1353
1354 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1355 PHONY += $(module-dirs) modules
1356 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1357         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1358
1359 modules: $(module-dirs)
1360         @$(kecho) '  Building modules, stage 2.';
1361         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1362
1363 PHONY += modules_install
1364 modules_install: _emodinst_ _emodinst_post
1365
1366 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1367 PHONY += _emodinst_
1368 _emodinst_:
1369         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1370         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1371
1372 PHONY += _emodinst_post
1373 _emodinst_post: _emodinst_
1374         $(call cmd,depmod)
1375
1376 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1377
1378 PHONY += $(clean-dirs) clean
1379 $(clean-dirs):
1380         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1381
1382 clean:  rm-dirs := $(MODVERDIR)
1383 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1384                    $(KBUILD_EXTMOD)/Module.markers \
1385                    $(KBUILD_EXTMOD)/modules.order \
1386                    $(KBUILD_EXTMOD)/modules.builtin
1387 clean: $(clean-dirs)
1388         $(call cmd,rmdirs)
1389         $(call cmd,rmfiles)
1390         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1391                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1392                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1393                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1394
1395 help:
1396         @echo  '  Building external modules.'
1397         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1398         @echo  ''
1399         @echo  '  modules         - default target, build the module(s)'
1400         @echo  '  modules_install - install the module'
1401         @echo  '  clean           - remove generated files in module directory only'
1402         @echo  ''
1403
1404 # Dummies...
1405 PHONY += prepare scripts
1406 prepare: ;
1407 scripts: ;
1408 endif # KBUILD_EXTMOD
1409
1410 # Generate tags for editors
1411 # ---------------------------------------------------------------------------
1412 quiet_cmd_tags = GEN     $@
1413       cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1414
1415 tags TAGS cscope: FORCE
1416         $(call cmd,tags)
1417
1418 # Scripts to check various things for consistency
1419 # ---------------------------------------------------------------------------
1420
1421 includecheck:
1422         find * $(RCS_FIND_IGNORE) \
1423                 -name '*.[hcS]' -type f -print | sort \
1424                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1425
1426 versioncheck:
1427         find * $(RCS_FIND_IGNORE) \
1428                 -name '*.[hcS]' -type f -print | sort \
1429                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1430
1431 namespacecheck:
1432         $(PERL) $(srctree)/scripts/namespace.pl
1433
1434 export_report:
1435         $(PERL) $(srctree)/scripts/export_report.pl
1436
1437 endif #ifeq ($(config-targets),1)
1438 endif #ifeq ($(mixed-targets),1)
1439
1440 PHONY += checkstack kernelrelease kernelversion
1441
1442 # UML needs a little special treatment here.  It wants to use the host
1443 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1444 # else wants $(ARCH), including people doing cross-builds, which means
1445 # that $(SUBARCH) doesn't work here.
1446 ifeq ($(ARCH), um)
1447 CHECKSTACK_ARCH := $(SUBARCH)
1448 else
1449 CHECKSTACK_ARCH := $(ARCH)
1450 endif
1451 checkstack:
1452         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1453         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1454
1455 kernelrelease:
1456         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1457         $(error kernelrelease not valid - run 'make prepare' to update it))
1458 kernelversion:
1459         @echo $(KERNELVERSION)
1460
1461 # Single targets
1462 # ---------------------------------------------------------------------------
1463 # Single targets are compatible with:
1464 # - build with mixed source and output
1465 # - build with separate output dir 'make O=...'
1466 # - external modules
1467 #
1468 #  target-dir => where to store outputfile
1469 #  build-dir  => directory in kernel source tree to use
1470
1471 ifeq ($(KBUILD_EXTMOD),)
1472         build-dir  = $(patsubst %/,%,$(dir $@))
1473         target-dir = $(dir $@)
1474 else
1475         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1476         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1477         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1478 endif
1479
1480 %.s: %.c prepare scripts FORCE
1481         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1482 %.i: %.c prepare scripts FORCE
1483         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1484 %.o: %.c prepare scripts FORCE
1485         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1486 %.lst: %.c prepare scripts FORCE
1487         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1488 %.s: %.S prepare scripts FORCE
1489         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1490 %.o: %.S prepare scripts FORCE
1491         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1492 %.symtypes: %.c prepare scripts FORCE
1493         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1494
1495 # Modules
1496 /: prepare scripts FORCE
1497         $(cmd_crmodverdir)
1498         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1499         $(build)=$(build-dir)
1500 %/: prepare scripts FORCE
1501         $(cmd_crmodverdir)
1502         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1503         $(build)=$(build-dir)
1504 %.ko: prepare scripts FORCE
1505         $(cmd_crmodverdir)
1506         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1507         $(build)=$(build-dir) $(@:.ko=.o)
1508         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1509
1510 # FIXME Should go into a make.lib or something
1511 # ===========================================================================
1512
1513 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1514       cmd_rmdirs = rm -rf $(rm-dirs)
1515
1516 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1517       cmd_rmfiles = rm -f $(rm-files)
1518
1519 # Run depmod only if we have System.map and depmod is executable
1520 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1521       cmd_depmod = \
1522         if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1523                 $(DEPMOD) -ae -F System.map                                     \
1524                 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) )     \
1525                 $(KERNELRELEASE);                                               \
1526         fi
1527
1528 # Create temporary dir for module support files
1529 # clean it up only when building all modules
1530 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1531                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1532
1533 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1534           $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1535           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1536
1537 quiet_cmd_as_o_S = AS      $@
1538 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1539
1540 # read all saved command lines
1541
1542 targets := $(wildcard $(sort $(targets)))
1543 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1544
1545 ifneq ($(cmd_files),)
1546   $(cmd_files): ;       # Do not try to update included dependency files
1547   include $(cmd_files)
1548 endif
1549
1550 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1551 # Usage:
1552 # $(Q)$(MAKE) $(clean)=dir
1553 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1554
1555 endif   # skip-makefile
1556
1557 PHONY += FORCE
1558 FORCE:
1559
1560 # Declare the contents of the .PHONY variable as phony.  We keep that
1561 # information in a variable so we can use it in if_changed and friends.
1562 .PHONY: $(PHONY)