Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 5
   3 SUBLEVEL = 73
   4 EXTRAVERSION =
   5
   6 # *DOCUMENTATION*
   7 # To see a list of typical targets execute "make help"
   8 # More info can be located in ./Documentation/kbuild
   9 # Comments in this file are targeted only to the developer, do not
  10 # expect to learn how to build the kernel reading this file.
  11
  12 # We are using a recursive build, so we need to do a little thinking
  13 # to get the ordering right.
  14 #
  15 # Most importantly: sub-Makefiles should only ever modify files in
  16 # their own directory. If in some directory we have a dependency on
  17 # a file in another dir (which doesn't happen often, but it's of
  18 # unavoidable when linking the built-in.o targets which finally
  19 # turn into vmlinux), we will call a sub make in that other dir, and
  20 # after that we are sure that everything which is in that other dir
  21 # is now up to date.
  22 #
  23 # The only cases where we need to modify files which have global
  24 # effects are thus separated out and done before the recursive
  25 # descending is started. They are now explicitly listed as the
  26 # prepare rule.
  27
  28 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  29
  30 # SUBARCH tells the usermode build what the underlying arch is.  That is set
  31 # first, and if a usermode build is happening, the "ARCH=um" on the command
  32 # line overrides the setting of ARCH below.  If a native build is happening,
  33 # then ARCH is assigned, getting whatever value it gets normally, and
  34 # SUBARCH is subsequently ignored.
  35
  36 SUBARCH := mips
  37
  38 # Remove hyphens since they have special meaning in RPM filenames
  39 KERNELPATH=kernel-$(subst -,,$(KERNELRELEASE))
  40
  41 # Cross compiling and selecting different set of gcc/bin-utils
  42 # ---------------------------------------------------------------------------
  43 #
  44 # When performing cross compilation for other architectures ARCH shall be set
  45 # to the target architecture. (See arch/* for the possibilities).
  46 # ARCH can be set during invocation of make:
  47 # make ARCH=ia64
  48 # Another way is to have ARCH set in the environment.
  49 # The default ARCH is the host where make is executed.
  50
  51 # CROSS_COMPILE specify the prefix used for all executables used
  52 # during compilation. Only gcc and related bin-utils executables
  53 # are prefixed with $(CROSS_COMPILE).
  54 # CROSS_COMPILE can be set on the command line
  55 # make CROSS_COMPILE=ia64-linux-
  56 # Alternatively CROSS_COMPILE can be set in the environment.
  57 # Default value for CROSS_COMPILE is not to prefix executables
  58 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  59
  60 ARCH            ?= $(SUBARCH)
  61 CROSS_COMPILE   ?=
  62
  63 # Architecture as present in compile.h
  64
  65 UTS_MACHINE := $(ARCH)
  66
  67 # SHELL used by kbuild
  68 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  69           else if [ -x /bin/bash ]; then echo /bin/bash; \
  70           else echo sh; fi ; fi)
  71 TOPDIR  := $(CURDIR)
  72
  73 HOSTCC          = gcc
  74 HOSTCXX         = g++
  75 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  76 HOSTCXXFLAGS    = -O2
  77
  78
  79 #       That's our default target when none is given on the command line
  80 #       Note that 'modules' will be added as a prerequisite as well,
  81 #       in the CONFIG_MODULES part below
  82
  83 all:    vmlinux
  84
  85 #       Decide whether to build built-in, modular, or both.
  86 #       Normally, just do built-in.
  87
  88 KBUILD_MODULES :=
  89 KBUILD_BUILTIN := 1
  90
  91 #       If we have only "make modules", don't compile built-in objects.
  92 #       When we're building modules with modversions, we need to consider
  93 #       the built-in objects during the descend as well, in order to
  94 #       make sure the checksums are uptodate before we record them.
  95
  96 ifeq ($(MAKECMDGOALS),modules)
  97   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  98 endif
  99
 100 #       If we have "make <whatever> modules", compile modules
 101 #       in addition to whatever we do anyway.
 102 #       Just "make" or "make all" shall build modules as well
 103
 104 ifneq ($(filter all modules,$(MAKECMDGOALS)),)
 105   KBUILD_MODULES := 1
 106 endif
 107
 108 ifeq ($(MAKECMDGOALS),)
 109   KBUILD_MODULES := 1
 110 endif
 111
 112 export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE KBUILD_CHECKSRC
 113
 114 # Beautify output
 115 # ---------------------------------------------------------------------------
 116 #
 117 # Normally, we echo the whole command before executing it. By making
 118 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 119 # $(quiet) to choose other forms of output instead, e.g.
 120 #
 121 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 122 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 123 #
 124 # If $(quiet) is empty, the whole command will be printed.
 125 # If it is set to "quiet_", only the short version will be printed.
 126 # If it is set to "silent_", nothing wil be printed at all, since
 127 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 128
 129 # To put more focus on warnings, less verbose as default
 130
 131 ifdef V
 132   ifeq ("$(origin V)", "command line")
 133     KBUILD_VERBOSE = $(V)
 134   endif
 135 endif
 136 ifndef KBUILD_VERBOSE
 137   KBUILD_VERBOSE = 0
 138 endif
 139
 140 ifdef C
 141   ifeq ("$(origin C)", "command line")
 142     KBUILD_CHECKSRC = $(C)
 143   endif
 144 endif
 145 ifndef KBUILD_CHECKSRC
 146   KBUILD_CHECKSRC = 0
 147 endif
 148
 149
 150 MAKEFLAGS += --no-print-directory
 151
 152 # For maximum performance (+ possibly random breakage, uncomment
 153 # the following)
 154
 155 #MAKEFLAGS += -rR
 156
 157 #       If the user wants quiet mode, echo short versions of the commands
 158 #       only
 159
 160 ifeq ($(KBUILD_VERBOSE),1)
 161   quiet =
 162   Q =
 163 else
 164   quiet=quiet_
 165   Q = @
 166 endif
 167
 168 #       If the user is running make -s (silent mode), suppress echoing of
 169 #       commands
 170
 171 ifneq ($(findstring s,$(MAKEFLAGS)),)
 172   quiet=silent_
 173 endif
 174
 175 export quiet Q KBUILD_VERBOSE
 176
 177 #       Paths to obj / src tree
 178
 179 src     := .
 180 obj     := .
 181 srctree := .
 182 objtree := .
 183
 184 export srctree objtree
 185
 186 #       Make variables (CC, etc...)
 187
 188 AS              = $(CROSS_COMPILE)as
 189 LD              = $(CROSS_COMPILE)ld
 190 CC              = $(CROSS_COMPILE)gcc
 191 CPP             = $(CC) -E
 192 AR              = $(CROSS_COMPILE)ar
 193 NM              = $(CROSS_COMPILE)nm
 194 STRIP           = $(CROSS_COMPILE)strip
 195 OBJCOPY         = $(CROSS_COMPILE)objcopy
 196 OBJDUMP         = $(CROSS_COMPILE)objdump
 197 AWK             = awk
 198 RPM             := $(shell if [ -x "/usr/bin/rpmbuild" ]; then echo rpmbuild; \
 199                         else echo rpm; fi)
 200 GENKSYMS        = scripts/genksyms/genksyms
 201 DEPMOD          = /sbin/depmod
 202 KALLSYMS        = scripts/kallsyms
 203 PERL            = perl
 204 CHECK           = sparse
 205 MODFLAGS        = -DMODULE
 206 CFLAGS_MODULE   = $(MODFLAGS)
 207 AFLAGS_MODULE   = $(MODFLAGS)
 208 LDFLAGS_MODULE  = -r
 209 CFLAGS_KERNEL   =
 210 AFLAGS_KERNEL   =
 211
 212 NOSTDINC_FLAGS  = -nostdinc -iwithprefix include
 213
 214 CPPFLAGS        := -D__KERNEL__ -Iinclude
 215 CFLAGS          := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
 216                    -fno-strict-aliasing -fno-common
 217 AFLAGS          := -D__ASSEMBLY__ $(CPPFLAGS)
 218
 219 export  VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
 220         CONFIG_SHELL TOPDIR HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 221         CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 222         HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB LDFLAGS_MODULE CHECK
 223
 224 export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
 225 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 226 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 227
 228 export MODVERDIR := .tmp_versions
 229
 230 # The temporary file to save gcc -MD generated dependencies must not
 231 # contain a comma
 232 comma := ,
 233 depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
 234
 235 noconfig_targets := xconfig gconfig menuconfig config oldconfig randconfig \
 236                     defconfig allyesconfig allnoconfig allmodconfig \
 237                     clean mrproper distclean rpm \
 238                     help tags TAGS cscope sgmldocs psdocs pdfdocs htmldocs \
 239                     checkconfig checkhelp checkincludes
 240
 241 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \) -prune -o
 242 RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS
 243
 244 # Helpers built in scripts/
 245 # ---------------------------------------------------------------------------
 246
 247 scripts/docproc scripts/fixdep scripts/split-include : scripts ;
 248
 249 .PHONY: scripts
 250 scripts:
 251         $(Q)$(MAKE) $(build)=scripts
 252
 253 # Objects we will link into vmlinux / subdirs we need to visit
 254 # ---------------------------------------------------------------------------
 255
 256 init-y          := init/
 257 drivers-y       := drivers/ sound/
 258 net-y           := net/
 259 libs-y          := lib/
 260 core-y          := usr/
 261 SUBDIRS         :=
 262
 263 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
 264
 265 export include_config := 1
 266
 267 -include .config
 268
 269 endif
 270
 271 include arch/$(ARCH)/Makefile
 272
 273 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/
 274
 275 SUBDIRS         += $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 276                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 277                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 278
 279 ALL_SUBDIRS     := $(sort $(SUBDIRS) $(patsubst %/,%,$(filter %/, \
 280                      $(init-n) $(init-) \
 281                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 282                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 283
 284 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 285 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 286 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 287 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 288 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 289 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 290 libs-y          := $(libs-y1) $(libs-y2)
 291
 292 ifdef include_config
 293
 294 # Here goes the main Makefile
 295 # ===========================================================================
 296 #
 297 # If the user gave a *config target, it'll be handled in another
 298 # section below, since in this case we cannot include .config
 299 # Same goes for other targets like clean/mrproper etc, which
 300 # don't need .config, either
 301
 302 #       In this section, we need .config
 303
 304 -include .config.cmd
 305
 306 ifndef CONFIG_FRAME_POINTER
 307 CFLAGS          += -fomit-frame-pointer
 308 endif
 309
 310 #
 311 # INSTALL_PATH specifies where to place the updated kernel and system map
 312 # images.  Uncomment if you want to place them anywhere other than root.
 313 #
 314
 315 #export INSTALL_PATH=/boot
 316
 317 #
 318 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 319 # relocations required by build roots.  This is not defined in the
 320 # makefile but the arguement can be passed to make if needed.
 321 #
 322
 323 MODLIB  := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 324 export MODLIB
 325
 326 # Build vmlinux
 327 # ---------------------------------------------------------------------------
 328
 329 #       This is a bit tricky: If we need to relink vmlinux, we want
 330 #       the version number incremented, which means recompile init/version.o
 331 #       and relink init/init.o. However, we cannot do this during the
 332 #       normal descending-into-subdirs phase, since at that time
 333 #       we cannot yet know if we will need to relink vmlinux.
 334 #       So we descend into init/ inside the rule for vmlinux again.
 335 head-y += $(HEAD)
 336 vmlinux-objs := $(head-y) $(init-y) $(core-y) $(libs-y) $(drivers-y) $(net-y)
 337
 338 quiet_cmd_vmlinux__ = LD      $@
 339 define cmd_vmlinux__
 340         $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) $(head-y) $(init-y) \
 341         --start-group \
 342         $(core-y) \
 343         $(libs-y) \
 344         $(drivers-y) \
 345         $(net-y) \
 346         --end-group \
 347         $(filter .tmp_kallsyms%,$^) \
 348         -o $@
 349 endef
 350
 351 #       set -e makes the rule exit immediately on error
 352
 353 define rule_vmlinux__
 354         set -e;                                                         \
 355         $(if $(filter .tmp_kallsyms%,$^),,                              \
 356           echo '  GEN     .version';                                    \
 357           . $(srctree)/scripts/mkversion > .tmp_version;                \
 358           mv -f .tmp_version .version;                                  \
 359           $(MAKE) $(build)=init;                                        \
 360         )                                                               \
 361         $(if $($(quiet)cmd_vmlinux__),                                  \
 362           echo '  $($(quiet)cmd_vmlinux__)' &&)                         \
 363         $(cmd_vmlinux__);                                               \
 364         echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 365 endef
 366
 367 define rule_vmlinux
 368         $(rule_vmlinux__); \
 369         $(NM) $@ | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort > System.map
 370 endef
 371
 372 LDFLAGS_vmlinux += -T arch/$(ARCH)/vmlinux.lds.s
 373
 374 #       Generate section listing all symbols and add it into vmlinux
 375 #       It's a three stage process:
 376 #       o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 377 #         empty
 378 #         Running kallsyms on that gives us .tmp_kallsyms1.o with
 379 #         the right size
 380 #       o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 381 #         but due to the added section, some addresses have shifted
 382 #         From here, we generate a correct .tmp_kallsyms2.o
 383 #       o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 384
 385 ifdef CONFIG_KALLSYMS
 386
 387 kallsyms.o := .tmp_kallsyms2.o
 388
 389 quiet_cmd_kallsyms = KSYM    $@
 390 cmd_kallsyms = $(NM) -n $< | scripts/kallsyms > $@
 391
 392 .tmp_kallsyms1.o .tmp_kallsyms2.o: %.o: %.S scripts FORCE
 393         $(call if_changed_dep,as_o_S)
 394
 395 .tmp_kallsyms%.S: .tmp_vmlinux%
 396         $(call cmd,kallsyms)
 397
 398 .tmp_vmlinux1: $(vmlinux-objs) arch/$(ARCH)/vmlinux.lds.s FORCE
 399         +$(call if_changed_rule,vmlinux__)
 400
 401 .tmp_vmlinux2: $(vmlinux-objs) .tmp_kallsyms1.o arch/$(ARCH)/vmlinux.lds.s FORCE
 402         $(call if_changed_rule,vmlinux__)
 403
 404 endif
 405
 406 #       Finally the vmlinux rule
 407
 408 vmlinux: $(vmlinux-objs) $(kallsyms.o) arch/$(ARCH)/vmlinux.lds.s FORCE
 409         $(call if_changed_rule,vmlinux)
 410
 411 #       The actual objects are generated when descending,
 412 #       make sure no implicit rule kicks in
 413
 414 $(sort $(vmlinux-objs)): $(SUBDIRS) ;
 415
 416 #       Handle descending into subdirectories listed in $(SUBDIRS)
 417
 418 .PHONY: $(SUBDIRS)
 419 $(SUBDIRS): prepare
 420         $(Q)$(MAKE) $(build)=$@
 421
 422 #       Things we need done before we descend to build or make
 423 #       module versions are listed in "prepare"
 424
 425 .PHONY: prepare
 426 prepare: include/linux/version.h include/asm include/config/MARKER
 427 ifdef KBUILD_MODULES
 428 ifeq ($(origin SUBDIRS),file)
 429         $(Q)rm -rf $(MODVERDIR)
 430 else
 431         @echo '*** Warning: Overriding SUBDIRS on the command line can cause'
 432         @echo '***          inconsistencies'
 433 endif
 434 endif
 435         $(if $(CONFIG_MODULES),$(Q)mkdir -p $(MODVERDIR))
 436
 437 #       This can be used by arch/$ARCH/Makefile to preprocess
 438 #       their vmlinux.lds.S file
 439
 440 AFLAGS_vmlinux.lds.o += -P -C -U$(ARCH)
 441
 442 arch/$(ARCH)/vmlinux.lds.s: %.s: %.S scripts FORCE
 443         $(call if_changed_dep,as_s_S)
 444
 445 targets += arch/$(ARCH)/vmlinux.lds.s
 446
 447 # Single targets
 448 # ---------------------------------------------------------------------------
 449
 450 %.s: %.c scripts FORCE
 451         $(Q)$(MAKE) $(build)=$(@D) $@
 452 %.i: %.c scripts FORCE
 453         $(Q)$(MAKE) $(build)=$(@D) $@
 454 %.o: %.c scripts FORCE
 455         $(Q)$(MAKE) $(build)=$(@D) $@
 456 %/:      scripts prepare FORCE
 457         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
 458 %.lst: %.c scripts FORCE
 459         $(Q)$(MAKE) $(build)=$(@D) $@
 460 %.s: %.S scripts FORCE
 461         $(Q)$(MAKE) $(build)=$(@D) $@
 462 %.o: %.S scripts FORCE
 463         $(Q)$(MAKE) $(build)=$(@D) $@
 464
 465 #       FIXME: The asm symlink changes when $(ARCH) changes. That's
 466 #       hard to detect, but I suppose "make mrproper" is a good idea
 467 #       before switching between archs anyway.
 468
 469 include/asm:
 470         @echo '  Making asm->asm-$(ARCH) symlink'
 471         @ln -s asm-$(ARCH) $@
 472
 473 #       Split autoconf.h into include/linux/config/*
 474
 475 include/config/MARKER: scripts/split-include include/linux/autoconf.h
 476         @echo '  SPLIT   include/linux/autoconf.h -> include/config/*'
 477         @scripts/split-include include/linux/autoconf.h include/config
 478         @touch $@
 479
 480 #       if .config is newer than include/linux/autoconf.h, someone tinkered
 481 #       with it and forgot to run make oldconfig
 482
 483 include/linux/autoconf.h: .config scripts/fixdep
 484         $(Q)$(MAKE) $(build)=scripts/kconfig scripts/kconfig/conf
 485         ./scripts/kconfig/conf -s arch/$(ARCH)/Kconfig
 486
 487 # Generate some files
 488 # ---------------------------------------------------------------------------
 489
 490 #       version.h changes when $(KERNELRELEASE) etc change, as defined in
 491 #       this Makefile
 492
 493 uts_len := 64
 494
 495 define filechk_version.h
 496         if expr length "$(KERNELRELEASE)" \> $(uts_len) >/dev/null ; then \
 497           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 498           exit 1; \
 499         fi; \
 500         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
 501           echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
 502          echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
 503         )
 504 endef
 505
 506 include/linux/version.h: Makefile
 507         $(call filechk,version.h)
 508
 509 # ---------------------------------------------------------------------------
 510
 511 .PHONY: depend dep
 512 depend dep:
 513         @echo '*** Warning: make $@ is unnecessary now.'
 514
 515 # ---------------------------------------------------------------------------
 516 # Modules
 517
 518 ifdef CONFIG_MODULES
 519
 520 #       By default, build modules as well
 521
 522 all: modules
 523
 524 #       Build modules
 525
 526 .PHONY: modules
 527 modules: $(SUBDIRS) $(if $(KBUILD_BUILTIN),vmlinux)
 528         @echo '  Building modules, stage 2.';
 529         $(Q)$(MAKE) -rR -f scripts/Makefile.modpost
 530
 531 #       Install modules
 532
 533 .PHONY: modules_install
 534 modules_install: _modinst_ _modinst_post
 535
 536 .PHONY: _modinst_
 537 _modinst_:
 538         @rm -rf $(MODLIB)/kernel
 539         @rm -f $(MODLIB)/build
 540         @mkdir -p $(MODLIB)/kernel
 541         @ln -s $(TOPDIR) $(MODLIB)/build
 542         $(Q)$(MAKE) -rR -f scripts/Makefile.modinst
 543
 544 # If System.map exists, run depmod.  This deliberately does not have a
 545 # dependency on System.map since that would run the dependency tree on
 546 # vmlinux.  This depmod is only for convenience to give the initial
 547 # boot a modules.dep even before / is mounted read-write.  However the
 548 # boot script depmod is the master version.
 549 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 550 depmod_opts     :=
 551 else
 552 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 553 endif
 554 .PHONY: _modinst_post
 555 _modinst_post: _modinst_
 556         if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 557
 558 else # CONFIG_MODULES
 559
 560 # Modules not configured
 561 # ---------------------------------------------------------------------------
 562
 563 modules modules_install: FORCE
 564         @echo
 565         @echo "The present kernel configuration has modules disabled."
 566         @echo "Type 'make config' and enable loadable module support."
 567         @echo "Then build a kernel with module support enabled."
 568         @echo
 569         @exit 1
 570
 571 endif # CONFIG_MODULES
 572
 573 # Generate asm-offsets.h
 574 # ---------------------------------------------------------------------------
 575
 576 define filechk_gen-asm-offsets
 577         (set -e; \
 578          echo "#ifndef __ASM_OFFSETS_H__"; \
 579          echo "#define __ASM_OFFSETS_H__"; \
 580          echo "/*"; \
 581          echo " * DO NOT MODIFY."; \
 582          echo " *"; \
 583          echo " * This file was generated by arch/$(ARCH)/Makefile"; \
 584          echo " *"; \
 585          echo " */"; \
 586          echo ""; \
 587          sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
 588          echo ""; \
 589          echo "#endif" )
 590 endef
 591
 592 else # ifdef include_config
 593
 594 ifeq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
 595
 596 # Targets which don't need .config
 597 # ===========================================================================
 598 #
 599 # These targets basically have their own Makefile - not quite, but at
 600 # least its own exclusive section in the same Makefile. The reason for
 601 # this is the following:
 602 # To know the configuration, the main Makefile has to include
 603 # .config. That's a obviously a problem when .config doesn't exist
 604 # yet, but that could be kludged around with only including it if it
 605 # exists.
 606 # However, the larger problem is: If you run make *config, make will
 607 # include the old .config, then execute your *config. It will then
 608 # notice that a piece it included (.config) did change and restart from
 609 # scratch. Which will cause execution of *config again. You get the
 610 # picture.
 611 # If we don't explicitly let the Makefile know that .config is changed
 612 # by *config (the old way), it won't reread .config after *config,
 613 # thus working with possibly stale values - we don't that either.
 614 #
 615 # So we divide things: This part here is for making *config targets,
 616 # and other targets which should work when no .config exists yet.
 617 # The main part above takes care of the rest after a .config exists.
 618
 619 # Kernel configuration
 620 # ---------------------------------------------------------------------------
 621
 622 .PHONY: oldconfig xconfig gconfig menuconfig config \
 623         make_with_config rpm
 624
 625 scripts/kconfig/conf scripts/kconfig/mconf scripts/kconfig/qconf scripts/kconfig/gconf: scripts/fixdep FORCE
 626         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 627
 628 xconfig: scripts/kconfig/qconf
 629         ./scripts/kconfig/qconf arch/$(ARCH)/Kconfig
 630
 631 gconfig: scripts/kconfig/gconf
 632         ./scripts/kconfig/gconf arch/$(ARCH)/Kconfig
 633
 634 menuconfig: scripts/kconfig/mconf
 635         $(Q)$(MAKE) $(build)=scripts/lxdialog
 636         ./scripts/kconfig/mconf arch/$(ARCH)/Kconfig
 637
 638 config: scripts/kconfig/conf
 639         ./scripts/kconfig/conf arch/$(ARCH)/Kconfig
 640
 641 oldconfig: scripts/kconfig/conf
 642         ./scripts/kconfig/conf -o arch/$(ARCH)/Kconfig
 643
 644 randconfig: scripts/kconfig/conf
 645         ./scripts/kconfig/conf -r arch/$(ARCH)/Kconfig
 646
 647 allyesconfig: scripts/kconfig/conf
 648         ./scripts/kconfig/conf -y arch/$(ARCH)/Kconfig
 649
 650 allnoconfig: scripts/kconfig/conf
 651         ./scripts/kconfig/conf -n arch/$(ARCH)/Kconfig
 652
 653 allmodconfig: scripts/kconfig/conf
 654         ./scripts/kconfig/conf -m arch/$(ARCH)/Kconfig
 655
 656 defconfig: scripts/kconfig/conf
 657         ./scripts/kconfig/conf -d arch/$(ARCH)/Kconfig
 658
 659 ###
 660 # Cleaning is done on three levels.
 661 # make clean     Delete all automatically generated files, including
 662 #                tools and firmware.
 663 # make mrproper  Delete the current configuration, and related files
 664 #                Any core files spread around are deleted as well
 665 # make distclean Remove editor backup files, patch leftover files and the like
 666
 667 # Files removed with 'make clean'
 668 CLEAN_FILES += vmlinux System.map MC*
 669
 670 # Files removed with 'make mrproper'
 671 MRPROPER_FILES += \
 672         include/linux/autoconf.h include/linux/version.h \
 673         .version .config .config.old config.in config.old \
 674         .menuconfig.log \
 675         include/asm \
 676         .hdepend include/linux/modversions.h \
 677         tags TAGS cscope kernel.spec \
 678         .tmp*
 679
 680 # Directories removed with 'make mrproper'
 681 MRPROPER_DIRS += \
 682         $(MODVERDIR) \
 683         .tmp_export-objs \
 684         include/config \
 685         include/linux/modules
 686
 687 # clean - Delete all intermediate files
 688 #
 689 clean-dirs += $(addprefix _clean_,$(ALL_SUBDIRS) Documentation/DocBook scripts)
 690 .PHONY: $(clean-dirs) clean archclean mrproper archmrproper distclean
 691 $(clean-dirs):
 692         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 693
 694 quiet_cmd_rmclean = RM  $$(CLEAN_FILES)
 695 cmd_rmclean       = rm -f $(CLEAN_FILES)
 696 clean: archclean $(clean-dirs)
 697         $(call cmd,rmclean)
 698         @find . $(RCS_FIND_IGNORE) \
 699                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 700                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
 701                 -type f -print | xargs rm -f
 702
 703 # mrproper - delete configuration + modules + core files
 704 #
 705 quiet_cmd_mrproper = RM  $$(MRPROPER_DIRS) + $$(MRPROPER_FILES)
 706 cmd_mrproper = rm -rf $(MRPROPER_DIRS) && rm -f $(MRPROPER_FILES)
 707 mrproper distclean: clean archmrproper
 708         @echo '  Making $@ in the srctree'
 709         @find . $(RCS_FIND_IGNORE) \
 710                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 711                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 712                 -o -name '.*.rej' -o -size 0 \
 713                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
 714                 -type f -print | xargs rm -f
 715         $(call cmd,mrproper)
 716
 717 # Generate tags for editors
 718 # ---------------------------------------------------------------------------
 719
 720 define all-sources
 721         ( find . $(RCS_FIND_IGNORE) \
 722                \( -name include -o -name arch \) -prune -o \
 723                -name '*.[chS]' -print; \
 724           find arch/$(ARCH) $(RCS_FIND_IGNORE) \
 725                -name '*.[chS]' -print; \
 726           find include $(RCS_FIND_IGNORE) \
 727                \( -name config -o -name 'asm-*' \) -prune \
 728                -o -name '*.[chS]' -print; \
 729           find include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
 730                -name '*.[chS]' -print; \
 731           find include/asm-generic $(RCS_FIND_IGNORE) \
 732                -name '*.[chS]' -print )
 733 endef
 734
 735 quiet_cmd_cscope = MAKE   $@
 736 cmd_cscope = $(all-sources) | cscope -k -b -i -
 737
 738 quiet_cmd_TAGS = MAKE   $@
 739 cmd_TAGS = $(all-sources) | etags -
 740
 741 #       Exuberant ctags works better with -I
 742
 743 quiet_cmd_tags = MAKE   $@
 744 define cmd_tags
 745         rm -f $@; \
 746         CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \
 747         $(all-sources) | xargs ctags $$CTAGSF -a
 748 endef
 749
 750 cscope: FORCE
 751         $(call cmd,cscope)
 752
 753 TAGS: FORCE
 754         $(call cmd,TAGS)
 755
 756 tags: FORCE
 757         $(call cmd,tags)
 758
 759 # RPM target
 760 # ---------------------------------------------------------------------------
 761
 762 #       If you do a make spec before packing the tarball you can rpm -ta it
 763
 764 spec:
 765         . $(srctree)/scripts/mkspec >kernel.spec
 766
 767 #       Build a tar ball, generate an rpm from it and pack the result
 768 #       There are two bits of magic here
 769 #       1) The use of /. to avoid tar packing just the symlink
 770 #       2) Removing the .dep files as they have source paths in them that
 771 #          will become invalid
 772
 773 rpm:    clean spec
 774         find . $(RCS_FIND_IGNORE) \
 775                 \( -size 0 -o -name .depend -o -name .hdepend \) \
 776                 -type f -print | xargs rm -f
 777         set -e; \
 778         cd $(TOPDIR)/.. ; \
 779         ln -sf $(TOPDIR) $(KERNELPATH) ; \
 780         tar -cvz $(RCS_TAR_IGNORE) -f $(KERNELPATH).tar.gz $(KERNELPATH)/. ; \
 781         rm $(KERNELPATH) ; \
 782         cd $(TOPDIR) ; \
 783         $(CONFIG_SHELL) $(srctree)/scripts/mkversion > .version ; \
 784         $(RPM) -ta $(TOPDIR)/../$(KERNELPATH).tar.gz ; \
 785         rm $(TOPDIR)/../$(KERNELPATH).tar.gz
 786
 787 # Brief documentation of the typical targets used
 788 # ---------------------------------------------------------------------------
 789
 790 help:
 791         @echo  'Cleaning targets:'
 792         @echo  '  clean           - remove most generated files but keep the config'
 793         @echo  '  mrproper        - remove all generated files + config + various backup files'
 794         @echo  ''
 795         @echo  'Configuration targets:'
 796         @echo  '  oldconfig       - Update current config utilising a line-oriented program'
 797         @echo  '  menuconfig      - Update current config utilising a menu based program'
 798         @echo  '  xconfig         - Update current config utilising a QT based front-end'
 799         @echo  '  gconfig         - Update current config utilising a GTK based front-end'
 800         @echo  '  defconfig       - New config with default answer to all options'
 801         @echo  '  allmodconfig    - New config selecting modules when possible'
 802         @echo  '  allyesconfig    - New config where all options are accepted with yes'
 803         @echo  '  allnoconfig     - New minimal config'
 804         @echo  ''
 805         @echo  'Other generic targets:'
 806         @echo  '  all             - Build all targets marked with [*]'
 807         @echo  '* vmlinux         - Build the bare kernel'
 808         @echo  '* modules         - Build all modules'
 809         @echo  '  modules_install - Install all modules'
 810         @echo  '  dir/            - Build all files in dir and below'
 811         @echo  '  dir/file.[ois]  - Build specified target only'
 812         @echo  '  rpm             - Build a kernel as an RPM package'
 813         @echo  '  tags/TAGS       - Generate tags file for editors'
 814         @echo  ''
 815         @echo  'Documentation targets:'
 816         @$(MAKE) --no-print-directory -f Documentation/DocBook/Makefile dochelp
 817         @echo  ''
 818         @echo  'Architecture specific targets ($(ARCH)):'
 819         @$(if $(archhelp),$(archhelp),\
 820                 echo '  No architecture specific help defined for $(ARCH)')
 821         @echo  ''
 822         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
 823         @echo  '  make C=1   [targets] Check all c source with checker tool'
 824         @echo  ''
 825         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
 826         @echo  'For further info browse Documentation/kbuild/*'
 827
 828
 829 # Documentation targets
 830 # ---------------------------------------------------------------------------
 831 sgmldocs psdocs pdfdocs htmldocs: scripts/docproc FORCE
 832         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
 833
 834 # Scripts to check various things for consistency
 835 # ---------------------------------------------------------------------------
 836
 837 checkconfig:
 838         find * $(RCS_FIND_IGNORE) \
 839                 -name '*.[hcS]' -type f -print | sort \
 840                 | xargs $(PERL) -w scripts/checkconfig.pl
 841
 842 checkincludes:
 843         find * $(RCS_FIND_IGNORE) \
 844                 -name '*.[hcS]' -type f -print | sort \
 845                 | xargs $(PERL) -w scripts/checkincludes.pl
 846
 847 else # ifneq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
 848
 849 # We're called with both targets which do and do not need
 850 # .config included. Handle them one after the other.
 851 # ===========================================================================
 852
 853 %:: FORCE
 854         $(Q)$(MAKE) $@
 855
 856 endif # ifeq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
 857 endif # ifdef include_config
 858
 859 # FIXME Should go into a make.lib or something
 860 # ===========================================================================
 861
 862 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) $(NOSTDINC_FLAGS) \
 863           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
 864
 865 quiet_cmd_as_s_S = CPP     $@
 866 cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<
 867
 868 quiet_cmd_as_o_S = AS      $@
 869 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 870
 871 # read all saved command lines
 872
 873 targets := $(wildcard $(sort $(targets)))
 874 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 875
 876 ifneq ($(cmd_files),)
 877   include $(cmd_files)
 878 endif
 879
 880 # execute the command and also postprocess generated .d dependencies
 881 # file
 882
 883 if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
 884                           $(filter-out $(cmd_$(1)),$(cmd_$@))\
 885                           $(filter-out $(cmd_$@),$(cmd_$(1)))),\
 886         @set -e; \
 887         $(if $($(quiet)cmd_$(1)),echo '  $(subst ','\'',$($(quiet)cmd_$(1)))';) \
 888         $(cmd_$(1)); \
 889         scripts/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
 890         rm -f $(depfile); \
 891         mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
 892
 893 # Usage: $(call if_changed_rule,foo)
 894 # will check if $(cmd_foo) changed, or any of the prequisites changed,
 895 # and if so will execute $(rule_foo)
 896
 897 if_changed_rule = $(if $(strip $? \
 898                                $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
 899                                $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
 900                        @$(rule_$(1)))
 901
 902 # If quiet is set, only print short version of command
 903
 904 cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
 905
 906 # filechk is used to check if the content of a generated file is updated.
 907 # Sample usage:
 908 # define filechk_sample
 909 #       echo $KERNELRELEASE
 910 # endef
 911 # version.h : Makefile
 912 #       $(call filechk,sample)
 913 # The rule defined shall write to stdout the content of the new file.
 914 # The existing file will be compared with the new one.
 915 # - If no file exist it is created
 916 # - If the content differ the new file is used
 917 # - If they are equal no change, and no timestamp update
 918
 919 define filechk
 920         @set -e;                                \
 921         echo '  CHK     $@';                    \
 922         $(filechk_$(1)) < $< > $@.tmp;          \
 923         if [ -r $@ ] && cmp -s $@ $@.tmp; then  \
 924                 rm -f $@.tmp;                   \
 925         else                                    \
 926                 echo '  UPD     $@';            \
 927                 mv -f $@.tmp $@;                \
 928         fi
 929 endef
 930
 931 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir
 932 # Usage:
 933 # $(Q)$(MAKE) $(build)=dir
 934 build := -f scripts/Makefile.build obj
 935
 936 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
 937 # Usage:
 938 # $(Q)$(MAKE) $(clean)=dir
 939 clean := -f scripts/Makefile.clean obj
 940
 941 #       $(call descend,<dir>,<target>)
 942 #       Recursively call a sub-make in <dir> with target <target>
 943 # Usage is deprecated, because make does not see this as an invocation of make.
 944 descend =$(Q)$(MAKE) -f scripts/Makefile.build obj=$(1) $(2)
 945
 946 FORCE: