Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 9
   4 EXTRAVERSION = -rc1
   5 NAME=Zonked Quokka
   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 of
  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 = $(V)
  38   endif
  39 endif
  40 ifndef KBUILD_VERBOSE
  41   KBUILD_VERBOSE = 0
  42 endif
  43
  44 # Call sparse as part of compilation of C files
  45 # Use 'make C=1' to enable sparse checking
  46
  47 ifdef C
  48   ifeq ("$(origin C)", "command line")
  49     KBUILD_CHECKSRC = $(C)
  50   endif
  51 endif
  52 ifndef KBUILD_CHECKSRC
  53   KBUILD_CHECKSRC = 0
  54 endif
  55
  56 # Use make M=dir to specify directory of external module to build
  57 # Old syntax make ... SUBDIRS=$PWD is still supported
  58 # Setting the environment variable KBUILD_EXTMOD take precedence
  59 ifdef SUBDIRS
  60   KBUILD_EXTMOD ?= $(SUBDIRS)
  61 endif
  62 ifdef M
  63   ifeq ("$(origin M)", "command line")
  64     KBUILD_EXTMOD := $(M)
  65   endif
  66 endif
  67
  68
  69 # kbuild supports saving output files in a separate directory.
  70 # To locate output files in a separate directory two syntax'es are supported.
  71 # In both cases the working directory must be the root of the kernel src.
  72 # 1) O=
  73 # Use "make O=dir/to/store/output/files/"
  74 #
  75 # 2) Set KBUILD_OUTPUT
  76 # Set the environment variable KBUILD_OUTPUT to point to the directory
  77 # where the output files shall be placed.
  78 # export KBUILD_OUTPUT=dir/to/store/output/files/
  79 # make
  80 #
  81 # The O= assigment takes precedence over the KBUILD_OUTPUT environment variable.
  82
  83
  84 # KBUILD_SRC is set on invocation of make in OBJ directory
  85 # KBUILD_SRC is not intended to be used by the regular user (for now)
  86 ifeq ($(KBUILD_SRC),)
  87
  88 # OK, Make called in directory where kernel src resides
  89 # Do we want to locate output files in a separate directory?
  90 ifdef O
  91   ifeq ("$(origin O)", "command line")
  92     KBUILD_OUTPUT := $(O)
  93   endif
  94 endif
  95
  96 # That's our default target when none is given on the command line
  97 .PHONY: _all
  98 _all:
  99
 100 ifneq ($(KBUILD_OUTPUT),)
 101 # Invoke a second make in the output directory, passing relevant variables
 102 # check that the output directory actually exists
 103 saved-output := $(KBUILD_OUTPUT)
 104 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 105 $(if $(KBUILD_OUTPUT),, \
 106      $(error output directory "$(saved-output)" does not exist))
 107
 108 .PHONY: $(MAKECMDGOALS)
 109
 110 $(filter-out _all,$(MAKECMDGOALS)) _all:
 111         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT)         \
 112         KBUILD_SRC=$(CURDIR)         KBUILD_VERBOSE=$(KBUILD_VERBOSE)   \
 113         KBUILD_CHECK=$(KBUILD_CHECK) KBUILD_EXTMOD="$(KBUILD_EXTMOD)"   \
 114         -f $(CURDIR)/Makefile $@
 115
 116 # Leave processing to above invocation of make
 117 skip-makefile := 1
 118 endif # ifneq ($(KBUILD_OUTPUT),)
 119 endif # ifeq ($(KBUILD_SRC),)
 120
 121 # We process the rest of the Makefile if this is the final invocation of make
 122 ifeq ($(skip-makefile),)
 123
 124 # If building an external module we do not care about the all: rule
 125 # but instead _all depend on modules
 126 .PHONY: all
 127 ifeq ($(KBUILD_EXTMOD),)
 128 _all: all
 129 else
 130 _all: modules
 131 endif
 132
 133 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 134 TOPDIR          := $(srctree)
 135 # FIXME - TOPDIR is obsolete, use srctree/objtree
 136 objtree         := $(CURDIR)
 137 src             := $(srctree)
 138 obj             := $(objtree)
 139
 140 VPATH           := $(srctree)
 141
 142 export srctree objtree VPATH TOPDIR
 143
 144 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 145
 146 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 147 # first, and if a usermode build is happening, the "ARCH=um" on the command
 148 # line overrides the setting of ARCH below.  If a native build is happening,
 149 # then ARCH is assigned, getting whatever value it gets normally, and
 150 # SUBARCH is subsequently ignored.
 151
 152 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 153                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 154                                   -e s/s390x/s390/ -e s/parisc64/parisc/ )
 155
 156 # Cross compiling and selecting different set of gcc/bin-utils
 157 # ---------------------------------------------------------------------------
 158 #
 159 # When performing cross compilation for other architectures ARCH shall be set
 160 # to the target architecture. (See arch/* for the possibilities).
 161 # ARCH can be set during invocation of make:
 162 # make ARCH=ia64
 163 # Another way is to have ARCH set in the environment.
 164 # The default ARCH is the host where make is executed.
 165
 166 # CROSS_COMPILE specify the prefix used for all executables used
 167 # during compilation. Only gcc and related bin-utils executables
 168 # are prefixed with $(CROSS_COMPILE).
 169 # CROSS_COMPILE can be set on the command line
 170 # make CROSS_COMPILE=ia64-linux-
 171 # Alternatively CROSS_COMPILE can be set in the environment.
 172 # Default value for CROSS_COMPILE is not to prefix executables
 173 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 174
 175 ARCH            ?= $(SUBARCH)
 176 CROSS_COMPILE   ?=
 177
 178 # Architecture as present in compile.h
 179 UTS_MACHINE := $(ARCH)
 180
 181 # SHELL used by kbuild
 182 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 183           else if [ -x /bin/bash ]; then echo /bin/bash; \
 184           else echo sh; fi ; fi)
 185
 186 HOSTCC          = gcc
 187 HOSTCXX         = g++
 188 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 189 HOSTCXXFLAGS    = -O2
 190
 191 #       Decide whether to build built-in, modular, or both.
 192 #       Normally, just do built-in.
 193
 194 KBUILD_MODULES :=
 195 KBUILD_BUILTIN := 1
 196
 197 #       If we have only "make modules", don't compile built-in objects.
 198 #       When we're building modules with modversions, we need to consider
 199 #       the built-in objects during the descend as well, in order to
 200 #       make sure the checksums are uptodate before we record them.
 201
 202 ifeq ($(MAKECMDGOALS),modules)
 203   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 204 endif
 205
 206 #       If we have "make <whatever> modules", compile modules
 207 #       in addition to whatever we do anyway.
 208 #       Just "make" or "make all" shall build modules as well
 209
 210 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 211   KBUILD_MODULES := 1
 212 endif
 213
 214 ifeq ($(MAKECMDGOALS),)
 215   KBUILD_MODULES := 1
 216 endif
 217
 218 export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE
 219 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 220
 221 # Beautify output
 222 # ---------------------------------------------------------------------------
 223 #
 224 # Normally, we echo the whole command before executing it. By making
 225 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 226 # $(quiet) to choose other forms of output instead, e.g.
 227 #
 228 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 229 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 230 #
 231 # If $(quiet) is empty, the whole command will be printed.
 232 # If it is set to "quiet_", only the short version will be printed.
 233 # If it is set to "silent_", nothing wil be printed at all, since
 234 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 235 #
 236 # A simple variant is to prefix commands with $(Q) - that's usefull
 237 # for commands that shall be hidden in non-verbose mode.
 238 #
 239 #       $(Q)ln $@ :<
 240 #
 241 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 242 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 243
 244 ifeq ($(KBUILD_VERBOSE),1)
 245   quiet =
 246   Q =
 247 else
 248   quiet=quiet_
 249   Q = @
 250 endif
 251
 252 # If the user is running make -s (silent mode), suppress echoing of
 253 # commands
 254
 255 ifneq ($(findstring s,$(MAKEFLAGS)),)
 256   quiet=silent_
 257 endif
 258
 259 export quiet Q KBUILD_VERBOSE
 260
 261 ######
 262 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
 263 # See documentation in Documentation/kbuild/makefiles.txt
 264
 265 # cc-option
 266 # Usage: cflags-y += $(call gcc-option, -march=winchip-c6, -march=i586)
 267
 268 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 269              > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
 270
 271 # For backward compatibility
 272 check_gcc = $(warning check_gcc is deprecated - use cc-option) \
 273             $(call cc-option, $(1),$(2))
 274
 275 # cc-option-yn
 276 # Usage: flag := $(call gcc-option-yn, -march=winchip-c6)
 277 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 278                 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
 279
 280 # cc-version
 281 # Usage gcc-ver := $(call cc-version $(CC))
 282 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
 283               $(if $(1), $(1), $(CC)))
 284
 285
 286 # Look for make include files relative to root of kernel src
 287 MAKEFLAGS += --include-dir=$(srctree)
 288
 289 # For maximum performance (+ possibly random breakage, uncomment
 290 # the following)
 291
 292 #MAKEFLAGS += -rR
 293
 294 # Make variables (CC, etc...)
 295
 296 AS              = $(CROSS_COMPILE)as
 297 LD              = $(CROSS_COMPILE)ld
 298 CC              = $(CROSS_COMPILE)gcc
 299 CPP             = $(CC) -E
 300 AR              = $(CROSS_COMPILE)ar
 301 NM              = $(CROSS_COMPILE)nm
 302 STRIP           = $(CROSS_COMPILE)strip
 303 OBJCOPY         = $(CROSS_COMPILE)objcopy
 304 OBJDUMP         = $(CROSS_COMPILE)objdump
 305 AWK             = awk
 306 GENKSYMS        = scripts/genksyms/genksyms
 307 DEPMOD          = /sbin/depmod
 308 KALLSYMS        = scripts/kallsyms
 309 PERL            = perl
 310 CHECK           = sparse
 311 CHECKFLAGS     :=
 312 MODFLAGS        = -DMODULE
 313 CFLAGS_MODULE   = $(MODFLAGS)
 314 AFLAGS_MODULE   = $(MODFLAGS)
 315 LDFLAGS_MODULE  = -r
 316 CFLAGS_KERNEL   =
 317 AFLAGS_KERNEL   =
 318
 319 NOSTDINC_FLAGS  = -nostdinc -iwithprefix include
 320
 321 # Use LINUXINCLUDE when you must reference the include/ directory.
 322 # Needed to be compatible with the O= option
 323 LINUXINCLUDE    := -Iinclude \
 324                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include)
 325
 326 CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)
 327
 328 CFLAGS          := -Wall -Wstrict-prototypes -Wno-trigraphs \
 329                    -fno-strict-aliasing -fno-common
 330 AFLAGS          := -D__ASSEMBLY__
 331
 332 export  VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
 333         CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 334         CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 335         HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB LDFLAGS_MODULE CHECK CHECKFLAGS
 336
 337 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 338 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 339 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 340
 341 # When compiling out-of-tree modules, put MODVERDIR in the module
 342 # tree rather than in the kernel tree. The kernel tree might
 343 # even be read-only.
 344 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 345
 346 # The temporary file to save gcc -MD generated dependencies must not
 347 # contain a comma
 348 comma := ,
 349 depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
 350
 351 # Files to ignore in find ... statements
 352
 353 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o
 354 RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc
 355
 356 # ===========================================================================
 357 # Rules shared between *config targets and build targets
 358
 359 # Basic helpers built in scripts/
 360 .PHONY: scripts_basic
 361 scripts_basic:
 362         $(Q)$(MAKE) $(build)=scripts/basic
 363
 364 # To make sure we do not include .config for any of the *config targets
 365 # catch them early, and hand them over to scripts/kconfig/Makefile
 366 # It is allowed to specify more targets when calling make, including
 367 # mixing *config targets and build targets.
 368 # For example 'make oldconfig all'.
 369 # Detect when mixed targets is specified, and make a second invocation
 370 # of make so .config is not included in this case either (for *config).
 371
 372 no-dot-config-targets := clean mrproper distclean \
 373                          cscope TAGS tags help %docs check%
 374
 375 config-targets := 0
 376 mixed-targets  := 0
 377 dot-config     := 1
 378
 379 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 380         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 381                 dot-config := 0
 382         endif
 383 endif
 384
 385 ifeq ($(KBUILD_EXTMOD),)
 386         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 387                 config-targets := 1
 388                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 389                         mixed-targets := 1
 390                 endif
 391         endif
 392 endif
 393
 394 ifeq ($(mixed-targets),1)
 395 # ===========================================================================
 396 # We're called with mixed targets (*config and build targets).
 397 # Handle them one by one.
 398
 399 %:: FORCE
 400         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 401
 402 else
 403 ifeq ($(config-targets),1)
 404 # ===========================================================================
 405 # *config targets only - make sure prerequisites are updated, and descend
 406 # in scripts/kconfig to make the *config target
 407
 408 config: scripts_basic FORCE
 409         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 410 %config: scripts_basic FORCE
 411         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 412
 413 else
 414 # ===========================================================================
 415 # Build targets only - this includes vmlinux, arch specific targets, clean
 416 # targets and others. In general all targets except *config targets.
 417
 418 ifeq ($(KBUILD_EXTMOD),)
 419 # Additional helpers built in scripts/
 420 # Carefully list dependencies so we do not try to build scripts twice
 421 # in parrallel
 422 .PHONY: scripts
 423 scripts: scripts_basic include/config/MARKER
 424         $(Q)$(MAKE) $(build)=$(@)
 425
 426 scripts_basic: include/linux/autoconf.h
 427
 428 # Objects we will link into vmlinux / subdirs we need to visit
 429 init-y          := init/
 430 drivers-y       := drivers/ sound/
 431 net-y           := net/
 432 libs-y          := lib/
 433 core-y          := usr/
 434 endif # KBUILD_EXTMOD
 435
 436 ifeq ($(dot-config),1)
 437 # In this section, we need .config
 438
 439 # Read in dependencies to all Kconfig* files, make sure to run
 440 # oldconfig if changes are detected.
 441 -include .config.cmd
 442
 443 include .config
 444
 445 # If .config needs to be updated, it will be done via the dependency
 446 # that autoconf has on .config.
 447 # To avoid any implicit rule to kick in, define an empty command
 448 .config: ;
 449
 450 # If .config is newer than include/linux/autoconf.h, someone tinkered
 451 # with it and forgot to run make oldconfig
 452 include/linux/autoconf.h: .config
 453         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 454 else
 455 # Dummy target needed, because used as prerequisite
 456 include/linux/autoconf.h: ;
 457 endif
 458
 459 include $(srctree)/arch/$(ARCH)/Makefile
 460
 461 # Default kernel image to build when no specific target is given.
 462 # KBUILD_IMAGE may be overruled on the commandline or
 463 # set in the environment
 464 # Also any assingments in arch/$(ARCH)/Makefiel take precedence over
 465 # this default value
 466 export KBUILD_IMAGE ?= vmlinux
 467
 468 # The all: target is the default when no target is given on the
 469 # command line.
 470 # This allow a user to issue only 'make' to build a kernel including modules
 471 # Defaults vmlinux but it is usually overriden in the arch makefile
 472 all: vmlinux
 473
 474 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 475 CFLAGS          += -Os
 476 else
 477 CFLAGS          += -O2
 478 endif
 479
 480 ifndef CONFIG_FRAME_POINTER
 481 CFLAGS          += -fomit-frame-pointer
 482 endif
 483
 484 ifdef CONFIG_DEBUG_INFO
 485 CFLAGS          += -g
 486 endif
 487
 488 # warn about C99 declaration after statement
 489 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 490
 491 #
 492 # INSTALL_PATH specifies where to place the updated kernel and system map
 493 # images.  Uncomment if you want to place them anywhere other than root.
 494 #
 495
 496 #export INSTALL_PATH=/boot
 497
 498 #
 499 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 500 # relocations required by build roots.  This is not defined in the
 501 # makefile but the arguement can be passed to make if needed.
 502 #
 503
 504 MODLIB  := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 505 export MODLIB
 506
 507
 508 ifeq ($(KBUILD_EXTMOD),)
 509 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/
 510
 511 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 512                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 513                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 514
 515 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 516                      $(init-n) $(init-) \
 517                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 518                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 519
 520 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 521 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 522 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 523 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 524 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 525 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 526 libs-y          := $(libs-y1) $(libs-y2)
 527
 528 # Build vmlinux
 529 # ---------------------------------------------------------------------------
 530
 531 #       This is a bit tricky: If we need to relink vmlinux, we want
 532 #       the version number incremented, which means recompile init/version.o
 533 #       and relink init/init.o. However, we cannot do this during the
 534 #       normal descending-into-subdirs phase, since at that time
 535 #       we cannot yet know if we will need to relink vmlinux.
 536 #       So we descend into init/ inside the rule for vmlinux again.
 537 vmlinux-objs := $(head-y) $(init-y) $(core-y) $(libs-y) $(drivers-y) $(net-y)
 538
 539 quiet_cmd_vmlinux__ = LD      $@
 540 define cmd_vmlinux__
 541         $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) $(head-y) $(init-y) \
 542         --start-group \
 543         $(core-y) \
 544         $(libs-y) \
 545         $(drivers-y) \
 546         $(net-y) \
 547         --end-group \
 548         $(filter .tmp_kallsyms%,$^) \
 549         -o $@
 550 endef
 551
 552 #       set -e makes the rule exit immediately on error
 553
 554 define rule_vmlinux__
 555         +set -e;                                                        \
 556         $(if $(filter .tmp_kallsyms%,$^),,                              \
 557           echo '  GEN     .version';                                    \
 558           . $(srctree)/scripts/mkversion > .tmp_version;                \
 559           mv -f .tmp_version .version;                                  \
 560           $(MAKE) $(build)=init;                                        \
 561         )                                                               \
 562         $(if $($(quiet)cmd_vmlinux__),                                  \
 563           echo '  $($(quiet)cmd_vmlinux__)' &&)                         \
 564         $(cmd_vmlinux__);                                               \
 565         echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 566 endef
 567
 568 quiet_cmd_sysmap = SYSMAP
 569       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 570
 571 LDFLAGS_vmlinux += -T arch/$(ARCH)/kernel/vmlinux.lds
 572
 573 #       Generate section listing all symbols and add it into vmlinux
 574 #       It's a three stage process:
 575 #       o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 576 #         empty
 577 #         Running kallsyms on that gives us .tmp_kallsyms1.o with
 578 #         the right size
 579 #       o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 580 #         but due to the added section, some addresses have shifted
 581 #         From here, we generate a correct .tmp_kallsyms2.o
 582 #       o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 583 #       o Verify that the System.map from vmlinux matches the map from
 584 #         .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 585 #       o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 586 #         .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 587 #         temporary bypass to allow the kernel to be built while the
 588 #         maintainers work out what went wrong with kallsyms.
 589
 590 ifdef CONFIG_KALLSYMS
 591
 592 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 593 last_kallsyms := 3
 594 else
 595 last_kallsyms := 2
 596 endif
 597
 598 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 599
 600 define rule_verify_kallsyms
 601         $(Q)$(if $($(quiet)cmd_sysmap),                       \
 602           echo '  $($(quiet)cmd_sysmap) .tmp_System.map' &&)  \
 603           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 604         $(Q)cmp -s System.map .tmp_System.map || \
 605                 (echo Inconsistent kallsyms data, try setting CONFIG_KALLSYMS_EXTRA_PASS ; rm .tmp_kallsyms* ; false)
 606 endef
 607
 608 quiet_cmd_kallsyms = KSYM    $@
 609 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) $(foreach x,$(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 610
 611 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 612         $(call if_changed_dep,as_o_S)
 613
 614 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 615         $(call cmd,kallsyms)
 616
 617 .tmp_vmlinux1: $(vmlinux-objs) arch/$(ARCH)/kernel/vmlinux.lds FORCE
 618         $(call if_changed_rule,vmlinux__)
 619
 620 .tmp_vmlinux2: $(vmlinux-objs) .tmp_kallsyms1.o arch/$(ARCH)/kernel/vmlinux.lds FORCE
 621         $(call if_changed_rule,vmlinux__)
 622
 623 .tmp_vmlinux3: $(vmlinux-objs) .tmp_kallsyms2.o arch/$(ARCH)/kernel/vmlinux.lds FORCE
 624         $(call if_changed_rule,vmlinux__)
 625
 626 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 627 $(KALLSYMS): scripts ;
 628
 629 endif
 630
 631 # Finally the vmlinux rule
 632 # This rule is also used to generate System.map
 633 # and to verify that the content of kallsyms are consistent
 634
 635 define rule_vmlinux
 636         $(rule_vmlinux__);
 637         $(Q)$(if $($(quiet)cmd_sysmap),                  \
 638           echo '  $($(quiet)cmd_sysmap) System.map' &&)  \
 639         $(cmd_sysmap) $@ System.map;                     \
 640         if [ $$? -ne 0 ]; then                           \
 641                 rm -f $@;                                \
 642                 /bin/false;                              \
 643         fi;
 644         $(rule_verify_kallsyms)
 645 endef
 646
 647 vmlinux: $(vmlinux-objs) $(kallsyms.o) arch/$(ARCH)/kernel/vmlinux.lds FORCE
 648         $(call if_changed_rule,vmlinux)
 649
 650 #       The actual objects are generated when descending,
 651 #       make sure no implicit rule kicks in
 652
 653 $(sort $(vmlinux-objs)) arch/$(ARCH)/kernel/vmlinux.lds: $(vmlinux-dirs) ;
 654
 655 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 656 # Preset locale variables to speed up the build process. Limit locale
 657 # tweaks to this spot to avoid wrong language settings when running
 658 # make menuconfig etc.
 659 # Error messages still appears in the original language
 660
 661 .PHONY: $(vmlinux-dirs)
 662 $(vmlinux-dirs): prepare-all scripts
 663         $(Q)$(MAKE) $(build)=$@
 664
 665 # Things we need to do before we recursively start building the kernel
 666 # or the modules are listed in "prepare-all".
 667 # A multi level approach is used. prepare1 is updated first, then prepare0.
 668 # prepare-all is the collection point for the prepare targets.
 669
 670 .PHONY: prepare-all prepare prepare0 prepare1 prepare2
 671
 672 # prepare 2 generate Makefile to be placed in output directory, if
 673 # using a seperate output directory. This allows convinient use
 674 # of make in output directory
 675 prepare2:
 676         $(Q)if [ ! $(srctree) -ef $(objtree) ]; then       \
 677         $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile      \
 678             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
 679             > $(objtree)/Makefile;                         \
 680         fi
 681
 682 # prepare1 is used to check if we are building in a separate output directory,
 683 # and if so do:
 684 # 1) Check that make has not been executed in the kernel src $(srctree)
 685 # 2) Create the include2 directory, used for the second asm symlink
 686
 687 prepare1: prepare2
 688 ifneq ($(KBUILD_SRC),)
 689         @echo '  Using $(srctree) as source for kernel'
 690         $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \
 691                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 692                 echo "  in the '$(srctree)' directory.";\
 693                 /bin/false; \
 694         fi;
 695         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 696         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 697 endif
 698
 699 prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER
 700 ifneq ($(KBUILD_MODULES),)
 701         $(Q)rm -rf $(MODVERDIR)
 702         $(Q)mkdir -p $(MODVERDIR)
 703 endif
 704
 705 # All the preparing..
 706 prepare-all: prepare0 prepare
 707
 708 #       Leave this as default for preprocessing vmlinux.lds.S, which is now
 709 #       done in arch/$(ARCH)/kernel/Makefile
 710
 711 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 712
 713 # Single targets
 714 # ---------------------------------------------------------------------------
 715
 716 %.s: %.c scripts FORCE
 717         $(Q)$(MAKE) $(build)=$(@D) $@
 718 %.i: %.c scripts FORCE
 719         $(Q)$(MAKE) $(build)=$(@D) $@
 720 %.o: %.c scripts FORCE
 721         $(Q)$(MAKE) $(build)=$(@D) $@
 722 %/:      scripts prepare FORCE
 723         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
 724 %.lst: %.c scripts FORCE
 725         $(Q)$(MAKE) $(build)=$(@D) $@
 726 %.s: %.S scripts FORCE
 727         $(Q)$(MAKE) $(build)=$(@D) $@
 728 %.o: %.S scripts FORCE
 729         $(Q)$(MAKE) $(build)=$(@D) $@
 730
 731 #       FIXME: The asm symlink changes when $(ARCH) changes. That's
 732 #       hard to detect, but I suppose "make mrproper" is a good idea
 733 #       before switching between archs anyway.
 734
 735 include/asm:
 736         @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 737         $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 738         @ln -fsn asm-$(ARCH) $@
 739
 740 #       Split autoconf.h into include/linux/config/*
 741
 742 include/config/MARKER: include/linux/autoconf.h
 743         @echo '  SPLIT   include/linux/autoconf.h -> include/config/*'
 744         @scripts/basic/split-include include/linux/autoconf.h include/config
 745         @touch $@
 746
 747 # Generate some files
 748 # ---------------------------------------------------------------------------
 749
 750 #       version.h changes when $(KERNELRELEASE) etc change, as defined in
 751 #       this Makefile
 752
 753 uts_len := 64
 754
 755 define filechk_version.h
 756         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 757           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 758           exit 1; \
 759         fi; \
 760         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
 761           echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
 762          echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
 763         )
 764 endef
 765
 766 include/linux/version.h: Makefile
 767         $(call filechk,version.h)
 768
 769 # ---------------------------------------------------------------------------
 770
 771 .PHONY: depend dep
 772 depend dep:
 773         @echo '*** Warning: make $@ is unnecessary now.'
 774
 775 # ---------------------------------------------------------------------------
 776 # Modules
 777
 778 ifdef CONFIG_MODULES
 779
 780 #       By default, build modules as well
 781
 782 all: modules
 783
 784 #       Build modules
 785
 786 .PHONY: modules
 787 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
 788         @echo '  Building modules, stage 2.';
 789         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 790
 791
 792 # Target to prepare building external modules
 793 .PHONY: modules_prepare
 794 modules_prepare: prepare-all scripts
 795
 796 # Target to install modules
 797 .PHONY: modules_install
 798 modules_install: _modinst_ _modinst_post
 799
 800 .PHONY: _modinst_
 801 _modinst_:
 802         @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \
 803                 echo "Warning: you may need to install module-init-tools"; \
 804                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 805                 sleep 1; \
 806         fi
 807         @rm -rf $(MODLIB)/kernel
 808         @rm -f $(MODLIB)/source
 809         @mkdir -p $(MODLIB)/kernel
 810         @ln -s $(srctree) $(MODLIB)/source
 811         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 812                 rm -f $(MODLIB)/build ; \
 813                 ln -s $(objtree) $(MODLIB)/build ; \
 814         fi
 815         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
 816
 817 # If System.map exists, run depmod.  This deliberately does not have a
 818 # dependency on System.map since that would run the dependency tree on
 819 # vmlinux.  This depmod is only for convenience to give the initial
 820 # boot a modules.dep even before / is mounted read-write.  However the
 821 # boot script depmod is the master version.
 822 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 823 depmod_opts     :=
 824 else
 825 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 826 endif
 827 .PHONY: _modinst_post
 828 _modinst_post: _modinst_
 829         if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 830
 831 else # CONFIG_MODULES
 832
 833 # Modules not configured
 834 # ---------------------------------------------------------------------------
 835
 836 modules modules_install: FORCE
 837         @echo
 838         @echo "The present kernel configuration has modules disabled."
 839         @echo "Type 'make config' and enable loadable module support."
 840         @echo "Then build a kernel with module support enabled."
 841         @echo
 842         @exit 1
 843
 844 endif # CONFIG_MODULES
 845
 846 # Generate asm-offsets.h
 847 # ---------------------------------------------------------------------------
 848
 849 define filechk_gen-asm-offsets
 850         (set -e; \
 851          echo "#ifndef __ASM_OFFSETS_H__"; \
 852          echo "#define __ASM_OFFSETS_H__"; \
 853          echo "/*"; \
 854          echo " * DO NOT MODIFY."; \
 855          echo " *"; \
 856          echo " * This file was generated by arch/$(ARCH)/Makefile"; \
 857          echo " *"; \
 858          echo " */"; \
 859          echo ""; \
 860          sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
 861          echo ""; \
 862          echo "#endif" )
 863 endef
 864
 865
 866 ###
 867 # Cleaning is done on three levels.
 868 # make clean     Delete most generated files
 869 #                Leave enough to build external modules
 870 # make mrproper  Delete the current configuration, and all generated files
 871 # make distclean Remove editor backup files, patch leftover files and the like
 872
 873 # Directories & files removed with 'make clean'
 874 CLEAN_DIRS  += $(MODVERDIR)
 875 CLEAN_FILES +=  vmlinux System.map \
 876                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
 877
 878 # Directories & files removed with 'make mrproper'
 879 MRPROPER_DIRS  += include/config include2
 880 MRPROPER_FILES += .config .config.old include/asm .version \
 881                   include/linux/autoconf.h include/linux/version.h \
 882                   Module.symvers tags TAGS cscope*
 883
 884 # clean - Delete most, but leave enough to build external modules
 885 #
 886 clean: rm-dirs  := $(CLEAN_DIRS)
 887 clean: rm-files := $(CLEAN_FILES)
 888 clean-dirs      := $(addprefix _clean_,$(vmlinux-alldirs))
 889
 890 .PHONY: $(clean-dirs) clean archclean
 891 $(clean-dirs):
 892         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 893
 894 clean: archclean $(clean-dirs)
 895         $(call cmd,rmdirs)
 896         $(call cmd,rmfiles)
 897         @find . $(RCS_FIND_IGNORE) \
 898                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 899                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
 900                 -type f -print | xargs rm -f
 901
 902 # mrproper - Delete all generated files, including .config
 903 #
 904 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
 905 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
 906 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
 907
 908 .PHONY: $(mrproper-dirs) mrproper archmrproper
 909 $(mrproper-dirs):
 910         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
 911
 912 mrproper: clean archmrproper $(mrproper-dirs)
 913         $(call cmd,rmdirs)
 914         $(call cmd,rmfiles)
 915
 916 # distclean
 917 #
 918 .PHONY: distclean
 919
 920 distclean: mrproper
 921         @find $(srctree) $(RCS_FIND_IGNORE) \
 922                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 923                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 924                 -o -name '.*.rej' -o -size 0 \
 925                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
 926                 -type f -print | xargs rm -f
 927
 928
 929 # Packaging of the kernel to various formats
 930 # ---------------------------------------------------------------------------
 931 # rpm target kept for backward compatibility
 932 package-dir     := $(srctree)/scripts/package
 933
 934 .PHONY: %-pkg rpm
 935
 936 %pkg: FORCE
 937         $(Q)$(MAKE) -f $(package-dir)/Makefile $@
 938 rpm: FORCE
 939         $(Q)$(MAKE) -f $(package-dir)/Makefile $@
 940
 941
 942 # Brief documentation of the typical targets used
 943 # ---------------------------------------------------------------------------
 944
 945 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
 946 boards := $(notdir $(boards))
 947
 948 help:
 949         @echo  'Cleaning targets:'
 950         @echo  '  clean           - remove most generated files but keep the config'
 951         @echo  '  mrproper        - remove all generated files + config + various backup files'
 952         @echo  ''
 953         @echo  'Configuration targets:'
 954         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
 955         @echo  ''
 956         @echo  'Other generic targets:'
 957         @echo  '  all             - Build all targets marked with [*]'
 958         @echo  '* vmlinux         - Build the bare kernel'
 959         @echo  '* modules         - Build all modules'
 960         @echo  '  modules_install - Install all modules'
 961         @echo  '  dir/            - Build all files in dir and below'
 962         @echo  '  dir/file.[ois]  - Build specified target only'
 963         @echo  '  rpm             - Build a kernel as an RPM package'
 964         @echo  '  tags/TAGS       - Generate tags file for editors'
 965         @echo  '  cscope          - Generate cscope index'
 966         @echo  '  checkstack      - Generate a list of stack hogs'
 967         @echo  'Kernel packaging:'
 968         @$(MAKE) -f $(package-dir)/Makefile help
 969         @echo  ''
 970         @echo  'Documentation targets:'
 971         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
 972         @echo  ''
 973         @echo  'Architecture specific targets ($(ARCH)):'
 974         @$(if $(archhelp),$(archhelp),\
 975                 echo '  No architecture specific help defined for $(ARCH)')
 976         @echo  ''
 977         @$(if $(boards), \
 978                 $(foreach b, $(boards), \
 979                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
 980                 echo '')
 981
 982         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
 983         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
 984         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse)'
 985         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK (sparse)'
 986         @echo  ''
 987         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
 988         @echo  'For further info see the ./README file'
 989
 990
 991 # Documentation targets
 992 # ---------------------------------------------------------------------------
 993 %docs: scripts_basic FORCE
 994         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
 995
 996 else # KBUILD_EXTMOD
 997
 998 ###
 999 # External module support.
1000 # When building external modules the kernel used as basis is considered
1001 # read-only, and no consistency checks are made and the make
1002 # system is not used on the basis kernel. If updates are required
1003 # in the basis kernel ordinary make commands (without M=...) must
1004 # be used.
1005 #
1006 # The following are the only valid targets when building external
1007 # modules.
1008 # make M=dir clean     Delete all automatically generated files
1009 # make M=dir modules   Make all modules in specified dir
1010 # make M=dir           Same as 'make M=dir modules'
1011 # make M=dir modules_install
1012 #                      Install the modules build in the module directory
1013 #                      Assumes install directory is already created
1014
1015 # We are always building modules
1016 KBUILD_MODULES := 1
1017 .PHONY: crmodverdir
1018 crmodverdir:
1019         $(Q)mkdir -p $(MODVERDIR)
1020
1021 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1022 .PHONY: $(module-dirs) modules
1023 $(module-dirs): crmodverdir
1024         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1025
1026 modules: $(module-dirs)
1027         @echo '  Building modules, stage 2.';
1028         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1029
1030 .PHONY: modules_install
1031 modules_install:
1032         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1033
1034 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1035
1036 .PHONY: $(clean-dirs) clean
1037 $(clean-dirs):
1038         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1039
1040 clean:  rm-dirs := $(MODVERDIR)
1041 clean: $(clean-dirs)
1042         $(call cmd,rmdirs)
1043         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1044                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1045                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1046                 -type f -print | xargs rm -f
1047
1048 help:
1049         @echo  '  Building external modules.'
1050         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1051         @echo  ''
1052         @echo  '  modules         - default target, build the module(s)'
1053         @echo  '  modules_install - install the module'
1054         @echo  '  clean           - remove generated files in module directory only'
1055         @echo  ''
1056 endif # KBUILD_EXTMOD
1057
1058 # Generate tags for editors
1059 # ---------------------------------------------------------------------------
1060
1061 define all-sources
1062         ( find $(srctree) $(RCS_FIND_IGNORE) \
1063                \( -name include -o -name arch \) -prune -o \
1064                -name '*.[chS]' -print; \
1065           find $(srctree)/arch/$(ARCH) $(RCS_FIND_IGNORE) \
1066                -name '*.[chS]' -print; \
1067           find $(srctree)/security/selinux/include $(RCS_FIND_IGNORE) \
1068                -name '*.[chS]' -print; \
1069           find $(srctree)/include $(RCS_FIND_IGNORE) \
1070                \( -name config -o -name 'asm-*' \) -prune \
1071                -o -name '*.[chS]' -print; \
1072           find $(srctree)/include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
1073                -name '*.[chS]' -print; \
1074           find $(srctree)/include/asm-generic $(RCS_FIND_IGNORE) \
1075                -name '*.[chS]' -print )
1076 endef
1077
1078 quiet_cmd_cscope-file = FILELST cscope.files
1079       cmd_cscope-file = $(all-sources) > cscope.files
1080
1081 quiet_cmd_cscope = MAKE    cscope.out
1082       cmd_cscope = cscope -k -b -q
1083
1084 cscope: FORCE
1085         $(call cmd,cscope-file)
1086         $(call cmd,cscope)
1087
1088 quiet_cmd_TAGS = MAKE   $@
1089 cmd_TAGS = $(all-sources) | etags -
1090
1091 #       Exuberant ctags works better with -I
1092
1093 quiet_cmd_tags = MAKE   $@
1094 define cmd_tags
1095         rm -f $@; \
1096         CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \
1097         $(all-sources) | xargs ctags $$CTAGSF -a
1098 endef
1099
1100 TAGS: FORCE
1101         $(call cmd,TAGS)
1102
1103 tags: FORCE
1104         $(call cmd,tags)
1105
1106
1107 # Scripts to check various things for consistency
1108 # ---------------------------------------------------------------------------
1109
1110 configcheck:
1111         find * $(RCS_FIND_IGNORE) \
1112                 -name '*.[hcS]' -type f -print | sort \
1113                 | xargs $(PERL) -w scripts/checkconfig.pl
1114
1115 includecheck:
1116         find * $(RCS_FIND_IGNORE) \
1117                 -name '*.[hcS]' -type f -print | sort \
1118                 | xargs $(PERL) -w scripts/checkincludes.pl
1119
1120 versioncheck:
1121         find * $(RCS_FIND_IGNORE) \
1122                 -name '*.[hcS]' -type f -print | sort \
1123                 | xargs $(PERL) -w scripts/checkversion.pl
1124
1125 buildcheck:
1126         $(PERL) scripts/reference_discarded.pl
1127         $(PERL) scripts/reference_init.pl
1128
1129 endif #ifeq ($(config-targets),1)
1130 endif #ifeq ($(mixed-targets),1)
1131
1132 .PHONY: checkstack
1133 checkstack:
1134         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1135         $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1136
1137 # FIXME Should go into a make.lib or something
1138 # ===========================================================================
1139
1140 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1141       cmd_rmdirs = rm -rf $(rm-dirs)
1142
1143 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1144       cmd_rmfiles = rm -f $(rm-files)
1145
1146
1147 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1148           $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1149           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1150
1151 quiet_cmd_as_o_S = AS      $@
1152 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1153
1154 # read all saved command lines
1155
1156 targets := $(wildcard $(sort $(targets)))
1157 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1158
1159 ifneq ($(cmd_files),)
1160   $(cmd_files): ;       # Do not try to update included dependency files
1161   include $(cmd_files)
1162 endif
1163
1164 # execute the command and also postprocess generated .d dependencies
1165 # file
1166
1167 if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
1168                           $(filter-out $(cmd_$(1)),$(cmd_$@))\
1169                           $(filter-out $(cmd_$@),$(cmd_$(1)))),\
1170         @set -e; \
1171         $(if $($(quiet)cmd_$(1)),echo '  $(subst ','\'',$($(quiet)cmd_$(1)))';) \
1172         $(cmd_$(1)); \
1173         scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
1174         rm -f $(depfile); \
1175         mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
1176
1177 # Usage: $(call if_changed_rule,foo)
1178 # will check if $(cmd_foo) changed, or any of the prequisites changed,
1179 # and if so will execute $(rule_foo)
1180
1181 if_changed_rule = $(if $(strip $? \
1182                                $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
1183                                $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
1184                        @$(rule_$(1)))
1185
1186 # If quiet is set, only print short version of command
1187
1188 cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
1189
1190 # filechk is used to check if the content of a generated file is updated.
1191 # Sample usage:
1192 # define filechk_sample
1193 #       echo $KERNELRELEASE
1194 # endef
1195 # version.h : Makefile
1196 #       $(call filechk,sample)
1197 # The rule defined shall write to stdout the content of the new file.
1198 # The existing file will be compared with the new one.
1199 # - If no file exist it is created
1200 # - If the content differ the new file is used
1201 # - If they are equal no change, and no timestamp update
1202
1203 define filechk
1204         @set -e;                                \
1205         echo '  CHK     $@';                    \
1206         mkdir -p $(dir $@);                     \
1207         $(filechk_$(1)) < $< > $@.tmp;          \
1208         if [ -r $@ ] && cmp -s $@ $@.tmp; then  \
1209                 rm -f $@.tmp;                   \
1210         else                                    \
1211                 echo '  UPD     $@';            \
1212                 mv -f $@.tmp $@;                \
1213         fi
1214 endef
1215
1216 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir
1217 # Usage:
1218 # $(Q)$(MAKE) $(build)=dir
1219 build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
1220
1221 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1222 # Usage:
1223 # $(Q)$(MAKE) $(clean)=dir
1224 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1225
1226 #       $(call descend,<dir>,<target>)
1227 #       Recursively call a sub-make in <dir> with target <target>
1228 # Usage is deprecated, because make does not see this as an invocation of make.
1229 descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2)
1230
1231 endif   # skip-makefile
1232
1233 FORCE: