Makefile

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