Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 5
   3 SUBLEVEL = 54
   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 := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/)
  37 ARCH := $(SUBARCH)
  38
  39 KERNELPATH=kernel-$(shell echo $(KERNELRELEASE) | sed -e "s/-//g")
  40
  41 UTS_MACHINE := $(ARCH)
  42
  43 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  44           else if [ -x /bin/bash ]; then echo /bin/bash; \
  45           else echo sh; fi ; fi)
  46 TOPDIR  := $(CURDIR)
  47
  48 HOSTCC          = gcc
  49 HOSTCXX         = g++
  50 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  51 HOSTCXXFLAGS    = -O2
  52
  53 CROSS_COMPILE   =
  54
  55 #       That's our default target when none is given on the command line
  56
  57 all:    vmlinux
  58
  59 #       Decide whether to build built-in, modular, or both.
  60 #       Normally, just do built-in.
  61
  62 KBUILD_MODULES :=
  63 KBUILD_BUILTIN := 1
  64
  65 #       If we have only "make modules", don't compile built-in objects.
  66
  67 ifeq ($(MAKECMDGOALS),modules)
  68   KBUILD_BUILTIN :=
  69 endif
  70
  71 #       If we have "make <whatever> modules", compile modules
  72 #       in addition to whatever we do anyway.
  73
  74 ifneq ($(filter modules,$(MAKECMDGOALS)),)
  75   KBUILD_MODULES := 1
  76 endif
  77
  78 #       Just "make" or "make all" shall build modules as well
  79
  80 ifeq ($(MAKECMDGOALS),)
  81   KBUILD_MODULES := 1
  82 endif
  83
  84 ifneq ($(filter all,$(MAKECMDGOALS)),)
  85   KBUILD_MODULES := 1
  86 endif
  87
  88 export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE
  89
  90 # Beautify output
  91 # ---------------------------------------------------------------------------
  92 #
  93 # Normally, we echo the whole command before executing it. By making
  94 # that echo $($(quiet)$(cmd)), we now have the possibility to set
  95 # $(quiet) to choose other forms of output instead, e.g.
  96 #
  97 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  98 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
  99 #
 100 # If $(quiet) is empty, the whole command will be printed.
 101 # If it is set to "quiet_", only the short version will be printed.
 102 # If it is set to "silent_", nothing wil be printed at all, since
 103 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 104
 105 #       For now, leave verbose as default
 106
 107 ifndef KBUILD_VERBOSE
 108   KBUILD_VERBOSE = 1
 109 endif
 110
 111 MAKEFLAGS += --no-print-directory
 112
 113 # For maximum performance (+ possibly random breakage, uncomment
 114 # the following)
 115
 116 #MAKEFLAGS += -rR
 117
 118 #       If the user wants quiet mode, echo short versions of the commands
 119 #       only
 120
 121 ifeq ($(KBUILD_VERBOSE),1)
 122   quiet =
 123   Q =
 124 else
 125   quiet=quiet_
 126   Q = @
 127 endif
 128
 129 #       If the user is running make -s (silent mode), suppress echoing of
 130 #       commands
 131
 132 ifneq ($(findstring s,$(MAKEFLAGS)),)
 133   quiet=silent_
 134 endif
 135
 136 export quiet Q KBUILD_VERBOSE
 137
 138 #       Paths to obj / src tree
 139
 140 src     := .
 141 obj     := .
 142 srctree := .
 143 objtree := .
 144
 145 export srctree objtree
 146
 147 #       Make variables (CC, etc...)
 148
 149 AS              = $(CROSS_COMPILE)as
 150 LD              = $(CROSS_COMPILE)ld
 151 CC              = $(CROSS_COMPILE)gcc
 152 CPP             = $(CC) -E
 153 AR              = $(CROSS_COMPILE)ar
 154 NM              = $(CROSS_COMPILE)nm
 155 STRIP           = $(CROSS_COMPILE)strip
 156 OBJCOPY         = $(CROSS_COMPILE)objcopy
 157 OBJDUMP         = $(CROSS_COMPILE)objdump
 158 AWK             = awk
 159 GENKSYMS        = /sbin/genksyms
 160 DEPMOD          = /sbin/depmod
 161 KALLSYMS        = scripts/kallsyms
 162 PERL            = perl
 163 MODFLAGS        = -DMODULE
 164 CFLAGS_MODULE   = $(MODFLAGS)
 165 AFLAGS_MODULE   = $(MODFLAGS)
 166 LDFLAGS_MODULE  = -r
 167 CFLAGS_KERNEL   =
 168 AFLAGS_KERNEL   =
 169
 170 NOSTDINC_FLAGS  = -nostdinc -iwithprefix include
 171
 172 CPPFLAGS        := -D__KERNEL__ -Iinclude
 173 CFLAGS          := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
 174                    -fno-strict-aliasing -fno-common
 175 AFLAGS          := -D__ASSEMBLY__ $(CPPFLAGS)
 176
 177 export  VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
 178         CONFIG_SHELL TOPDIR HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 179         CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 180         HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB LDFLAGS_MODULE
 181
 182 export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
 183 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 184 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 185
 186 # The temporary file to save gcc -MD generated dependencies must not
 187 # contain a comma
 188 depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
 189
 190 noconfig_targets := xconfig menuconfig config oldconfig randconfig \
 191                     defconfig allyesconfig allnoconfig allmodconfig \
 192                     clean mrproper distclean \
 193                     help tags TAGS sgmldocs psdocs pdfdocs htmldocs \
 194                     checkconfig checkhelp checkincludes
 195
 196 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \) -prune -o
 197 RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS
 198
 199 # Helpers built in scripts/
 200 # ---------------------------------------------------------------------------
 201
 202 scripts/docproc scripts/fixdep scripts/split-include : scripts ;
 203
 204 .PHONY: scripts
 205 scripts:
 206         $(Q)$(MAKE) $(build)=scripts
 207
 208 # Objects we will link into vmlinux / subdirs we need to visit
 209 # ---------------------------------------------------------------------------
 210
 211 init-y          := init/
 212 drivers-y       := drivers/ sound/
 213 net-y           := net/
 214 libs-y          := lib/
 215 core-y          := usr/
 216 SUBDIRS         :=
 217
 218 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
 219
 220 export include_config := 1
 221
 222 -include .config
 223
 224 endif
 225
 226 include arch/$(ARCH)/Makefile
 227
 228 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/
 229
 230 SUBDIRS         += $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 231                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 232                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 233
 234 ALL_SUBDIRS     := $(sort $(SUBDIRS) $(patsubst %/,%,$(filter %/, \
 235                      $(init-n) $(init-) \
 236                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 237                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 238
 239 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 240 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 241 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 242 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 243 libs-y          := $(patsubst %/, %/lib.a, $(libs-y))
 244
 245 ifdef include_config
 246
 247 # Here goes the main Makefile
 248 # ===========================================================================
 249 #
 250 # If the user gave a *config target, it'll be handled in another
 251 # section below, since in this case we cannot include .config
 252 # Same goes for other targets like clean/mrproper etc, which
 253 # don't need .config, either
 254
 255 #       In this section, we need .config
 256
 257 -include .config.cmd
 258
 259 ifdef CONFIG_MODULES
 260 export EXPORT_FLAGS := -DEXPORT_SYMTAB
 261 endif
 262
 263 ifndef CONFIG_FRAME_POINTER
 264 CFLAGS          += -fomit-frame-pointer
 265 endif
 266
 267 #
 268 # INSTALL_PATH specifies where to place the updated kernel and system map
 269 # images.  Uncomment if you want to place them anywhere other than root.
 270 #
 271
 272 #export INSTALL_PATH=/boot
 273
 274 #
 275 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 276 # relocations required by build roots.  This is not defined in the
 277 # makefile but the arguement can be passed to make if needed.
 278 #
 279
 280 MODLIB  := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 281 export MODLIB
 282
 283 # Build vmlinux
 284 # ---------------------------------------------------------------------------
 285
 286 #       This is a bit tricky: If we need to relink vmlinux, we want
 287 #       the version number incremented, which means recompile init/version.o
 288 #       and relink init/init.o. However, we cannot do this during the
 289 #       normal descending-into-subdirs phase, since at that time
 290 #       we cannot yet know if we will need to relink vmlinux.
 291 #       So we descend into init/ inside the rule for vmlinux again.
 292
 293 vmlinux-objs := $(HEAD) $(init-y) $(core-y) $(libs-y) $(drivers-y) $(net-y)
 294
 295 quiet_cmd_vmlinux__ = LD      $@
 296 define cmd_vmlinux__
 297         $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) $(HEAD) $(init-y) \
 298         --start-group \
 299         $(core-y) \
 300         $(libs-y) \
 301         $(drivers-y) \
 302         $(net-y) \
 303         --end-group \
 304         $(filter .tmp_kallsyms%,$^) \
 305         -o $@
 306 endef
 307
 308 #       set -e makes the rule exit immediately on error
 309 #       Final awk script makes sure per-cpu vars are in per-cpu section, as
 310 #       old gcc (eg egcs 2.92.11) ignores section attribute if uninitialized.
 311
 312 define rule_vmlinux__
 313         set -e
 314         $(if $(filter .tmp_kallsyms%,$^),,
 315           echo '  Generating build number'
 316           . $(src)/scripts/mkversion > .tmp_version
 317           mv -f .tmp_version .version
 318           $(Q)$(MAKE) $(build)=init
 319         )
 320         $(call cmd,vmlinux__)
 321         echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 322 endef
 323
 324 define rule_vmlinux_no_percpu
 325         $(rule_vmlinux__)
 326         $(NM) $@ | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort > System.map
 327 endef
 328
 329 ifdef CONFIG_SMP
 330 define rule_vmlinux
 331         $(rule_vmlinux_no_percpu)
 332         $(AWK) -f $(srctree)/scripts/per-cpu-check.awk < System.map
 333 endef
 334 else
 335 define rule_vmlinux
 336         $(rule_vmlinux_no_percpu)
 337 endef
 338 endif
 339
 340 LDFLAGS_vmlinux += -T arch/$(ARCH)/vmlinux.lds.s
 341
 342 #       Generate section listing all symbols and add it into vmlinux
 343 #       It's a three stage process:
 344 #       o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 345 #         empty
 346 #         Running kallsyms on that gives as .tmp_kallsyms1.o with
 347 #         the right size
 348 #       o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 349 #         but due to the added section, some addresses have shifted
 350 #         From here, we generate a correct .tmp_kallsyms2.o
 351 #       o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 352
 353 ifdef CONFIG_KALLSYMS
 354
 355 kallsyms.o := .tmp_kallsyms2.o
 356
 357 quiet_cmd_kallsyms = KSYM    $@
 358 cmd_kallsyms = $(NM) -n $< | scripts/kallsyms > $@
 359
 360 .tmp_kallsyms1.o .tmp_kallsyms2.o: %.o: %.S scripts FORCE
 361         $(call if_changed_dep,as_o_S)
 362
 363 .tmp_kallsyms%.S: .tmp_vmlinux%
 364         $(call cmd,kallsyms)
 365
 366 .tmp_vmlinux1: $(vmlinux-objs) arch/$(ARCH)/vmlinux.lds.s FORCE
 367         $(call if_changed_rule,vmlinux__)
 368
 369 .tmp_vmlinux2: $(vmlinux-objs) .tmp_kallsyms1.o arch/$(ARCH)/vmlinux.lds.s FORCE
 370         $(call if_changed_rule,vmlinux__)
 371
 372 endif
 373
 374 #       Finally the vmlinux rule
 375
 376 vmlinux: $(vmlinux-objs) $(kallsyms.o) arch/$(ARCH)/vmlinux.lds.s FORCE
 377         $(call if_changed_rule,vmlinux)
 378
 379 #       The actual objects are generated when descending,
 380 #       make sure no implicit rule kicks in
 381
 382 $(sort $(vmlinux-objs)): $(SUBDIRS) ;
 383
 384 #       Handle descending into subdirectories listed in $(SUBDIRS)
 385
 386 .PHONY: $(SUBDIRS)
 387 $(SUBDIRS): .hdepend prepare
 388         $(Q)$(MAKE) $(build)=$@
 389
 390 #       Things we need done before we descend to build or make
 391 #       module versions are listed in "prepare"
 392
 393 .PHONY: prepare
 394 prepare: include/linux/version.h include/asm include/config/MARKER
 395         @echo '  Starting the build. KBUILD_BUILTIN=$(KBUILD_BUILTIN) KBUILD_MODULES=$(KBUILD_MODULES)'
 396
 397 #       This can be used by arch/$ARCH/Makefile to preprocess
 398 #       their vmlinux.lds.S file
 399
 400 AFLAGS_vmlinux.lds.o += -P -C -U$(ARCH)
 401
 402 arch/$(ARCH)/vmlinux.lds.s: %.s: %.S scripts FORCE
 403         $(call if_changed_dep,as_s_S)
 404
 405 targets += arch/$(ARCH)/vmlinux.lds.s
 406
 407 # Single targets
 408 # ---------------------------------------------------------------------------
 409
 410 %.s: %.c scripts FORCE
 411         $(Q)$(MAKE) $(build)=$(@D) $@
 412 %.i: %.c scripts FORCE
 413         $(Q)$(MAKE) $(build)=$(@D) $@
 414 %.o: %.c scripts FORCE
 415         $(Q)$(MAKE) $(build)=$(@D) $@
 416 %.ko: scripts FORCE
 417         $(Q)$(MAKE) $(build)=$(@D) $@
 418 %.lst: %.c scripts FORCE
 419         $(Q)$(MAKE) $(build)=$(@D) $@
 420 %.s: %.S scripts FORCE
 421         $(Q)$(MAKE) $(build)=$(@D) $@
 422 %.o: %.S scripts FORCE
 423         $(Q)$(MAKE) $(build)=$(@D) $@
 424
 425 #       FIXME: The asm symlink changes when $(ARCH) changes. That's
 426 #       hard to detect, but I suppose "make mrproper" is a good idea
 427 #       before switching between archs anyway.
 428
 429 include/asm:
 430         @echo '  Making asm->asm-$(ARCH) symlink'
 431         @ln -s asm-$(ARCH) $@
 432
 433 #       Split autoconf.h into include/linux/config/*
 434
 435 include/config/MARKER: scripts/split-include include/linux/autoconf.h
 436         @echo '  SPLIT  include/linux/autoconf.h -> include/config/*'
 437         @scripts/split-include include/linux/autoconf.h include/config
 438         @touch $@
 439
 440 #       if .config is newer than include/linux/autoconf.h, someone tinkered
 441 #       with it and forgot to run make oldconfig
 442
 443 include/linux/autoconf.h: .config
 444         $(Q)$(MAKE) $(build)=scripts/kconfig scripts/kconfig/conf
 445         ./scripts/kconfig/conf -s arch/$(ARCH)/Kconfig
 446
 447 # Generate some files
 448 # ---------------------------------------------------------------------------
 449
 450 #       version.h changes when $(KERNELRELEASE) etc change, as defined in
 451 #       this Makefile
 452
 453 uts_len := 64
 454
 455 include/linux/version.h: Makefile
 456         @if expr length "$(KERNELRELEASE)" \> $(uts_len) >/dev/null ; then \
 457           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 458           exit 1; \
 459         fi;
 460         @echo -n '  Generating $@'
 461         @(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
 462           echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
 463          echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
 464         ) > $@.tmp
 465         @$(update-if-changed)
 466
 467 # Generate module versions
 468 # ---------------------------------------------------------------------------
 469
 470 #       The targets are still named depend / dep for traditional
 471 #       reasons, but the only thing we do here is generating
 472 #       the module version checksums.
 473
 474 .PHONY: depend dep $(patsubst %,_sfdep_%,$(SUBDIRS))
 475
 476 depend dep: .hdepend
 477
 478 #       .hdepend is our (misnomed) marker for whether we've
 479 #       generated module versions
 480
 481 make-versions := $(strip $(if $(filter dep depend,$(MAKECMDGOALS)),1) \
 482                          $(if $(wildcard .hdepend),,1))
 483
 484 .hdepend: prepare FORCE
 485 ifneq ($(make-versions),)
 486         @$(MAKE) include/linux/modversions.h
 487         @touch $@
 488 endif
 489
 490 ifdef CONFIG_MODVERSIONS
 491
 492 #       Update modversions.h, but only if it would change.
 493
 494 .PHONY: __rm_tmp_export-objs
 495 __rm_tmp_export-objs:
 496         @rm -rf .tmp_export-objs
 497
 498 include/linux/modversions.h: $(patsubst %,_modver_%,$(SUBDIRS))
 499         @echo -n '  Generating $@'
 500         @( echo "#ifndef _LINUX_MODVERSIONS_H";\
 501            echo "#define _LINUX_MODVERSIONS_H"; \
 502            echo "#include <linux/modsetver.h>"; \
 503            cd .tmp_export-objs >/dev/null; \
 504            for f in `find modules -name \*.ver -print | sort`; do \
 505              echo "#include <linux/$${f}>"; \
 506            done; \
 507            echo "#endif"; \
 508         ) > $@.tmp; \
 509         $(update-if-changed)
 510
 511 .PHONY: $(patsubst %, _modver_%, $(SUBDIRS))
 512 $(patsubst %, _modver_%, $(SUBDIRS)): __rm_tmp_export-objs
 513         $(Q)$(MAKE) -f scripts/Makefile.modver obj=$(patsubst _modver_%,%,$@)
 514
 515 else # !CONFIG_MODVERSIONS
 516
 517 .PHONY: include/linux/modversions.h
 518
 519 include/linux/modversions.h:
 520
 521 endif # CONFIG_MODVERSIONS
 522
 523 # ---------------------------------------------------------------------------
 524 # Modules
 525
 526 ifdef CONFIG_MODULES
 527
 528 #       Build modules
 529
 530 ifdef CONFIG_MODVERSIONS
 531 MODFLAGS += -include include/linux/modversions.h
 532 endif
 533
 534 .PHONY: modules
 535 modules: $(SUBDIRS)
 536
 537 #       Install modules
 538
 539 .PHONY: modules_install
 540 modules_install: _modinst_ $(patsubst %, _modinst_%, $(SUBDIRS)) _modinst_post
 541
 542 .PHONY: _modinst_
 543 _modinst_:
 544         @rm -rf $(MODLIB)/kernel
 545         @rm -f $(MODLIB)/build
 546         @mkdir -p $(MODLIB)/kernel
 547         @ln -s $(TOPDIR) $(MODLIB)/build
 548
 549 # If System.map exists, run depmod.  This deliberately does not have a
 550 # dependency on System.map since that would run the dependency tree on
 551 # vmlinux.  This depmod is only for convenience to give the initial
 552 # boot a modules.dep even before / is mounted read-write.  However the
 553 # boot script depmod is the master version.
 554 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 555 depmod_opts     :=
 556 else
 557 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 558 endif
 559 .PHONY: _modinst_post
 560 _modinst_post:
 561         if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 562
 563 .PHONY: $(patsubst %, _modinst_%, $(SUBDIRS))
 564 $(patsubst %, _modinst_%, $(SUBDIRS)) :
 565         $(Q)$(MAKE) -rR -f scripts/Makefile.modinst obj=$(patsubst _modinst_%,%,$@)
 566 else # CONFIG_MODULES
 567
 568 # Modules not configured
 569 # ---------------------------------------------------------------------------
 570
 571 modules modules_install: FORCE
 572         @echo
 573         @echo "The present kernel configuration has modules disabled."
 574         @echo "Type 'make config' and enable loadable module support."
 575         @echo "Then build a kernel with module support enabled."
 576         @echo
 577         @exit 1
 578
 579 endif # CONFIG_MODULES
 580
 581 # Generate asm-offsets.h
 582 # ---------------------------------------------------------------------------
 583
 584 define generate-asm-offsets.h
 585         (set -e; \
 586          echo "#ifndef __ASM_OFFSETS_H__"; \
 587          echo "#define __ASM_OFFSETS_H__"; \
 588          echo "/*"; \
 589          echo " * DO NOT MODIFY."; \
 590          echo " *"; \
 591          echo " * This file was generated by arch/$(ARCH)/Makefile"; \
 592          echo " *"; \
 593          echo " */"; \
 594          echo ""; \
 595          sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
 596          echo ""; \
 597          echo "#endif" )
 598 endef
 599
 600 # RPM target
 601 # ---------------------------------------------------------------------------
 602
 603 #       If you do a make spec before packing the tarball you can rpm -ta it
 604
 605 spec:
 606         . scripts/mkspec >kernel.spec
 607
 608 #       Build a tar ball, generate an rpm from it and pack the result
 609 #       There arw two bits of magic here
 610 #       1) The use of /. to avoid tar packing just the symlink
 611 #       2) Removing the .dep files as they have source paths in them that
 612 #          will become invalid
 613
 614 rpm:    clean spec
 615         find . $(RCS_FIND_IGNORE) \
 616                 \( -size 0 -o -name .depend -o -name .hdepend \) \
 617                 -type f -print | xargs rm -f
 618         set -e; \
 619         cd $(TOPDIR)/.. ; \
 620         ln -sf $(TOPDIR) $(KERNELPATH) ; \
 621         tar -cvz $(RCS_TAR_IGNORE) -f $(KERNELPATH).tar.gz $(KERNELPATH)/. ; \
 622         rm $(KERNELPATH) ; \
 623         cd $(TOPDIR) ; \
 624         $(CONFIG_SHELL) $(srctree)/scripts/mkversion > .version ; \
 625         rpm -ta $(TOPDIR)/../$(KERNELPATH).tar.gz ; \
 626         rm $(TOPDIR)/../$(KERNELPATH).tar.gz
 627
 628 else # ifdef include_config
 629
 630 ifeq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
 631
 632 # Targets which don't need .config
 633 # ===========================================================================
 634 #
 635 # These targets basically have their own Makefile - not quite, but at
 636 # least its own exclusive section in the same Makefile. The reason for
 637 # this is the following:
 638 # To know the configuration, the main Makefile has to include
 639 # .config. That's a obviously a problem when .config doesn't exist
 640 # yet, but that could be kludged around with only including it if it
 641 # exists.
 642 # However, the larger problem is: If you run make *config, make will
 643 # include the old .config, then execute your *config. It will then
 644 # notice that a piece it included (.config) did change and restart from
 645 # scratch. Which will cause execution of *config again. You get the
 646 # picture.
 647 # If we don't explicitly let the Makefile know that .config is changed
 648 # by *config (the old way), it won't reread .config after *config,
 649 # thus working with possibly stale values - we don't that either.
 650 #
 651 # So we divide things: This part here is for making *config targets,
 652 # and other targets which should work when no .config exists yet.
 653 # The main part above takes care of the rest after a .config exists.
 654
 655 # Kernel configuration
 656 # ---------------------------------------------------------------------------
 657
 658 .PHONY: oldconfig xconfig menuconfig config \
 659         make_with_config
 660
 661 scripts/kconfig/conf scripts/kconfig/mconf scripts/kconfig/qconf: scripts/fixdep FORCE
 662         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 663
 664 xconfig: scripts/kconfig/qconf
 665         ./scripts/kconfig/qconf arch/$(ARCH)/Kconfig
 666
 667 menuconfig: scripts/kconfig/mconf
 668         $(Q)$(MAKE) $(build)=scripts/lxdialog
 669         ./scripts/kconfig/mconf arch/$(ARCH)/Kconfig
 670
 671 config: scripts/kconfig/conf
 672         ./scripts/kconfig/conf arch/$(ARCH)/Kconfig
 673
 674 oldconfig: scripts/kconfig/conf
 675         ./scripts/kconfig/conf -o arch/$(ARCH)/Kconfig
 676
 677 randconfig: scripts/kconfig/conf
 678         ./scripts/kconfig/conf -r arch/$(ARCH)/Kconfig
 679
 680 allyesconfig: scripts/kconfig/conf
 681         ./scripts/kconfig/conf -y arch/$(ARCH)/Kconfig
 682
 683 allnoconfig: scripts/kconfig/conf
 684         ./scripts/kconfig/conf -n arch/$(ARCH)/Kconfig
 685
 686 allmodconfig: scripts/kconfig/conf
 687         ./scripts/kconfig/conf -m arch/$(ARCH)/Kconfig
 688
 689 defconfig: scripts/kconfig/conf
 690         ./scripts/kconfig/conf -d arch/$(ARCH)/Kconfig
 691
 692 ###
 693 # Cleaning is done on three levels.
 694 # make clean     Delete all automatically generated files, including
 695 #                tools and firmware.
 696 # make mrproper  Delete the current configuration, and related files
 697 #                Any core files spread around is deleted as well
 698 # make distclean Remove editor backup files, patch leftover files and the like
 699
 700 # Files removed with 'make clean'
 701 CLEAN_FILES += vmlinux System.map MC*
 702
 703 # Files removed with 'make mrproper'
 704 MRPROPER_FILES += \
 705         include/linux/autoconf.h include/linux/version.h \
 706         .version .config .config.old config.in config.old \
 707         .menuconfig.log \
 708         include/asm \
 709         .hdepend include/linux/modversions.h \
 710         tags TAGS kernel.spec \
 711         .tmp*
 712
 713 # Directories removed with 'make mrproper'
 714 MRPROPER_DIRS += \
 715         .tmp_export-objs \
 716         include/config \
 717         include/linux/modules
 718
 719 # clean - Delete all intermediate files
 720 #
 721 clean-dirs += $(ALL_SUBDIRS) Documentation/DocBook scripts
 722
 723 $(addprefix _clean_,$(clean-dirs)):
 724         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 725
 726 quiet_cmd_rmclean = RM  $$(CLEAN_FILES)
 727 cmd_rmclean       = rm -f $(CLEAN_FILES)
 728 clean: archclean $(addprefix _clean_,$(clean-dirs))
 729         $(call cmd,rmclean)
 730         @find . $(RCS_FIND_IGNORE) \
 731                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 732                 -o -name '.*.d' -o -name '.*.tmp' \) -type f \
 733                 -print | xargs rm -f
 734
 735 # mrproper - delete configuration + modules + core files
 736 #
 737 quiet_cmd_mrproper = RM  $$(MRPROPER_DIRS) + $$(MRPROPER_FILES)
 738 cmd_mrproper = rm -rf $(MRPROPER_DIRS) && rm -f $(MRPROPER_FILES)
 739 mrproper distclean: clean archmrproper
 740         @echo '  Making $@ in the srctree'
 741         @find . $(RCS_FIND_IGNORE) \
 742                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 743                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 744                 -o -name '.*.rej' -o -size 0 \
 745                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
 746                 -type f -print | xargs rm -f
 747         $(call cmd,mrproper)
 748
 749 # Generate tags for editors
 750 # ---------------------------------------------------------------------------
 751
 752 define all-sources
 753         ( find . $(RCS_FIND_IGNORE) \
 754                \( -name include -o -name arch \) -prune -o \
 755                -name '*.[chS]' -print; \
 756           find arch/$(ARCH) $(RCS_FIND_IGNORE) \
 757                -name '*.[chS]' -print; \
 758           find include $(RCS_FIND_IGNORE) \
 759                \( -name config -o -name 'asm-*' \) -prune \
 760                -o -name '*.[chS]' -print; \
 761           find include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
 762                -name '*.[chS]' -print; \
 763           find include/asm-generic $(RCS_FIND_IGNORE) \
 764                -name '*.[chS]' -print )
 765 endef
 766
 767 quiet_cmd_TAGS = MAKE   $@
 768 cmd_TAGS = $(all-sources) | etags -
 769
 770 #       Exuberant ctags works better with -I
 771
 772 quiet_cmd_tags = MAKE   $@
 773 define cmd_tags
 774         rm -f $@; \
 775         CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \
 776         $(all-sources) | xargs ctags $$CTAGSF -a
 777 endef
 778
 779 TAGS: FORCE
 780         $(call cmd,TAGS)
 781
 782 tags: FORCE
 783         $(call cmd,tags)
 784
 785 # Brief documentation of the typical targets used
 786 # ---------------------------------------------------------------------------
 787
 788 help:
 789         @echo  'Cleaning targets:'
 790         @echo  '  clean         - remove most generated files but keep the config'
 791         @echo  '  mrproper      - remove all generated files + config + various backup files'
 792         @echo  ''
 793         @echo  'Configuration targets:'
 794         @echo  '  oldconfig     - Update current config utilising a line-oriented program'
 795         @echo  '  menuconfig    - Update current config utilising a menu based program'
 796         @echo  '  xconfig       - Update current config utilising a X-based program'
 797         @echo  '  defconfig     - New config with default answer to all options'
 798         @echo  '  allmodconfig  - New config selecting modules when possible'
 799         @echo  '  allyesconfig  - New config where all options are accepted with yes'
 800         @echo  '  allnoconfig   - New minimal config'
 801         @echo  ''
 802         @echo  'Other generic targets:'
 803         @echo  '  all           - Build all targets marked with [*]'
 804         @echo  '  dep           - Create module version information'
 805         @echo  '* vmlinux       - Build the bare kernel'
 806         @echo  '* modules       - Build all modules'
 807         @echo  '  dir/file.[ois]- Build specified target only'
 808         @echo  '  rpm           - Build a kernel as an RPM package'
 809         @echo  '  tags/TAGS     - Generate tags file for editors'
 810         @echo  ''
 811         @echo  'Documentation targets:'
 812         @$(MAKE) --no-print-directory -f Documentation/DocBook/Makefile dochelp
 813         @echo  ''
 814         @echo  'Architecture specific targets ($(ARCH)):'
 815         @$(if $(archhelp),$(archhelp),\
 816                 echo '  No architecture specific help defined for $(ARCH)')
 817         @echo  ''
 818         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
 819         @echo  'For further info browse Documentation/kbuild/*'
 820
 821
 822 # Documentation targets
 823 # ---------------------------------------------------------------------------
 824 sgmldocs psdocs pdfdocs htmldocs: scripts
 825         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
 826
 827 # Scripts to check various things for consistency
 828 # ---------------------------------------------------------------------------
 829
 830 checkconfig:
 831         find * $(RCS_FIND_IGNORE) \
 832                 -name '*.[hcS]' -type f -print | sort \
 833                 | xargs $(PERL) -w scripts/checkconfig.pl
 834
 835 checkhelp:
 836         find * $(RCS_FIND_IGNORE) \
 837                 -name [cC]onfig.in -print | sort \
 838                 | xargs $(PERL) -w scripts/checkhelp.pl
 839
 840 checkincludes:
 841         find * $(RCS_FIND_IGNORE) \
 842                 -name '*.[hcS]' -type f -print | sort \
 843                 | xargs $(PERL) -w scripts/checkincludes.pl
 844
 845 else # ifneq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
 846
 847 # We're called with both targets which do and do not need
 848 # .config included. Handle them one after the other.
 849 # ===========================================================================
 850
 851 %:: FORCE
 852         $(Q)$(MAKE) $@
 853
 854 endif # ifeq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
 855 endif # ifdef include_config
 856
 857 # FIXME Should go into a make.lib or something
 858 # ===========================================================================
 859
 860 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) $(NOSTDINC_FLAGS) \
 861           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
 862
 863 quiet_cmd_as_s_S = CPP     $@
 864 cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<
 865
 866 quiet_cmd_as_o_S = AS      $@
 867 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 868
 869 # read all saved command lines
 870
 871 targets := $(wildcard $(sort $(targets)))
 872 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 873
 874 ifneq ($(cmd_files),)
 875   include $(cmd_files)
 876 endif
 877
 878 # execute the command and also postprocess generated .d dependencies
 879 # file
 880
 881 if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
 882                           $(filter-out $(cmd_$(1)),$(cmd_$@))\
 883                           $(filter-out $(cmd_$@),$(cmd_$(1)))),\
 884         @set -e; \
 885         $(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))';) \
 886         $(cmd_$(1)); \
 887         scripts/fixdep $(depfile) $@ '$(cmd_$(1))' > $(@D)/.$(@F).tmp; \
 888         rm -f $(depfile); \
 889         mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
 890
 891 # Usage: $(call if_changed_rule,foo)
 892 # will check if $(cmd_foo) changed, or any of the prequisites changed,
 893 # and if so will execute $(rule_foo)
 894
 895 if_changed_rule = $(if $(strip $? \
 896                                $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
 897                                $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
 898                        @$(rule_$(1)))
 899
 900 # If quiet is set, only print short version of command
 901
 902 cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
 903
 904 define update-if-changed
 905         if [ -r $@ ] && cmp -s $@ $@.tmp; then \
 906                 echo ' (unchanged)'; \
 907                 rm -f $@.tmp; \
 908         else \
 909                 echo ' (updated)'; \
 910                 mv -f $@.tmp $@; \
 911         fi
 912 endef
 913
 914 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
 915 # Usage:
 916 # $(Q)$(MAKE) $(build)=dir
 917 build := -f scripts/Makefile.build obj
 918
 919 # Shorthand for $(Q)$(MAKE) scripts/Makefile.clean obj=dir
 920 # Usage:
 921 # $(Q)$(MAKE) $(clean)=dir
 922 clean := -f scripts/Makefile.clean obj
 923
 924 #       $(call descend,<dir>,<target>)
 925 #       Recursively call a sub-make in <dir> with target <target>
 926 # Usage is deprecated, because make do not see this as an invocation of make.
 927 descend =$(Q)$(MAKE) -f scripts/Makefile.build obj=$(1) $(2)
 928
 929 FORCE: