Makefile

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