Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 0
   4 EXTRAVERSION = -test3
   5
   6 # *DOCUMENTATION*
   7 # To see a list of typical targets execute "make help"
   8 # More info can be located in ./README
   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 := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  37                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
  38                                   -e s/s390x/s390/ -e s/parisc64/parisc/ )
  39
  40 # Remove hyphens since they have special meaning in RPM filenames
  41 KERNELPATH=kernel-$(subst -,,$(KERNELRELEASE))
  42
  43 # Cross compiling and selecting different set of gcc/bin-utils
  44 # ---------------------------------------------------------------------------
  45 #
  46 # When performing cross compilation for other architectures ARCH shall be set
  47 # to the target architecture. (See arch/* for the possibilities).
  48 # ARCH can be set during invocation of make:
  49 # make ARCH=ia64
  50 # Another way is to have ARCH set in the environment.
  51 # The default ARCH is the host where make is executed.
  52
  53 # CROSS_COMPILE specify the prefix used for all executables used
  54 # during compilation. Only gcc and related bin-utils executables
  55 # are prefixed with $(CROSS_COMPILE).
  56 # CROSS_COMPILE can be set on the command line
  57 # make CROSS_COMPILE=ia64-linux-
  58 # Alternatively CROSS_COMPILE can be set in the environment.
  59 # Default value for CROSS_COMPILE is not to prefix executables
  60 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  61
  62 ARCH            ?= $(SUBARCH)
  63 CROSS_COMPILE   ?=
  64
  65 # Architecture as present in compile.h
  66 UTS_MACHINE := $(ARCH)
  67
  68 # SHELL used by kbuild
  69 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  70           else if [ -x /bin/bash ]; then echo /bin/bash; \
  71           else echo sh; fi ; fi)
  72 TOPDIR  := $(CURDIR)
  73
  74 HOSTCC          = gcc
  75 HOSTCXX         = g++
  76 HOSTCFLAGS      = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  77 HOSTCXXFLAGS    = -O2
  78
  79
  80 #       That's our default target when none is given on the command line
  81 #       Note that 'modules' will be added as a prerequisite as well,
  82 #       in the CONFIG_MODULES part below
  83
  84 all:    vmlinux
  85
  86 #       Decide whether to build built-in, modular, or both.
  87 #       Normally, just do built-in.
  88
  89 KBUILD_MODULES :=
  90 KBUILD_BUILTIN := 1
  91
  92 #       If we have only "make modules", don't compile built-in objects.
  93 #       When we're building modules with modversions, we need to consider
  94 #       the built-in objects during the descend as well, in order to
  95 #       make sure the checksums are uptodate before we record them.
  96
  97 ifeq ($(MAKECMDGOALS),modules)
  98   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  99 endif
 100
 101 #       If we have "make <whatever> modules", compile modules
 102 #       in addition to whatever we do anyway.
 103 #       Just "make" or "make all" shall build modules as well
 104
 105 ifneq ($(filter all modules,$(MAKECMDGOALS)),)
 106   KBUILD_MODULES := 1
 107 endif
 108
 109 ifeq ($(MAKECMDGOALS),)
 110   KBUILD_MODULES := 1
 111 endif
 112
 113 export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE KBUILD_CHECKSRC
 114
 115 # To put more focus on warnings, less verbose as default
 116 # Use 'make V=1' to see the full commands
 117
 118 ifdef V
 119   ifeq ("$(origin V)", "command line")
 120     KBUILD_VERBOSE = $(V)
 121   endif
 122 endif
 123 ifndef KBUILD_VERBOSE
 124   KBUILD_VERBOSE = 0
 125 endif
 126
 127 # Call sparse as part of compilation of C files
 128 # Use 'make C=1' to enable sparse checking
 129
 130 ifdef C
 131   ifeq ("$(origin C)", "command line")
 132     KBUILD_CHECKSRC = $(C)
 133   endif
 134 endif
 135 ifndef KBUILD_CHECKSRC
 136   KBUILD_CHECKSRC = 0
 137 endif
 138
 139 # Do not print 'Entering directory ...'
 140
 141 MAKEFLAGS += --no-print-directory
 142
 143 # For maximum performance (+ possibly random breakage, uncomment
 144 # the following)
 145
 146 #MAKEFLAGS += -rR
 147
 148 # Beautify output
 149 # ---------------------------------------------------------------------------
 150 #
 151 # Normally, we echo the whole command before executing it. By making
 152 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 153 # $(quiet) to choose other forms of output instead, e.g.
 154 #
 155 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 156 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 157 #
 158 # If $(quiet) is empty, the whole command will be printed.
 159 # If it is set to "quiet_", only the short version will be printed.
 160 # If it is set to "silent_", nothing wil be printed at all, since
 161 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 162 #
 163 # A simple variant is to prefix commands with $(Q) - that's usefull
 164 # for commands that shall be hidden in non-verbose mode.
 165 #
 166 #       $(Q)ln $@ :<
 167 #
 168 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 169 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 170
 171 ifeq ($(KBUILD_VERBOSE),1)
 172   quiet =
 173   Q =
 174 else
 175   quiet=quiet_
 176   Q = @
 177 endif
 178
 179 # If the user is running make -s (silent mode), suppress echoing of
 180 # commands
 181
 182 ifneq ($(findstring s,$(MAKEFLAGS)),)
 183   quiet=silent_
 184 endif
 185
 186 export quiet Q KBUILD_VERBOSE
 187
 188 # Paths to obj / src tree
 189
 190 src     := .
 191 obj     := .
 192 srctree := .
 193 objtree := .
 194
 195 export srctree objtree
 196
 197 # Make variables (CC, etc...)
 198
 199 AS              = $(CROSS_COMPILE)as
 200 LD              = $(CROSS_COMPILE)ld
 201 CC              = $(CROSS_COMPILE)gcc
 202 CPP             = $(CC) -E
 203 AR              = $(CROSS_COMPILE)ar
 204 NM              = $(CROSS_COMPILE)nm
 205 STRIP           = $(CROSS_COMPILE)strip
 206 OBJCOPY         = $(CROSS_COMPILE)objcopy
 207 OBJDUMP         = $(CROSS_COMPILE)objdump
 208 AWK             = awk
 209 RPM             := $(shell if [ -x "/usr/bin/rpmbuild" ]; then echo rpmbuild; \
 210                         else echo rpm; fi)
 211 GENKSYMS        = scripts/genksyms/genksyms
 212 DEPMOD          = /sbin/depmod
 213 KALLSYMS        = scripts/kallsyms
 214 PERL            = perl
 215 CHECK           = sparse
 216 MODFLAGS        = -DMODULE
 217 CFLAGS_MODULE   = $(MODFLAGS)
 218 AFLAGS_MODULE   = $(MODFLAGS)
 219 LDFLAGS_MODULE  = -r
 220 CFLAGS_KERNEL   =
 221 AFLAGS_KERNEL   =
 222
 223 NOSTDINC_FLAGS  = -nostdinc -iwithprefix include
 224
 225 CPPFLAGS        := -D__KERNEL__ -Iinclude
 226 CFLAGS          := -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
 227                    -fno-strict-aliasing -fno-common
 228 AFLAGS          := -D__ASSEMBLY__
 229
 230 export  VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
 231         CONFIG_SHELL TOPDIR HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 232         CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 233         HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB LDFLAGS_MODULE CHECK
 234
 235 export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
 236 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 237 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 238
 239 export MODVERDIR := .tmp_versions
 240
 241 # The temporary file to save gcc -MD generated dependencies must not
 242 # contain a comma
 243 comma := ,
 244 depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
 245
 246 noconfig_targets := xconfig gconfig menuconfig config oldconfig randconfig \
 247                     defconfig allyesconfig allnoconfig allmodconfig \
 248                     clean mrproper distclean rpm \
 249                     help tags TAGS cscope %docs \
 250                     checkconfig checkhelp checkincludes
 251
 252 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \) -prune -o
 253 RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS
 254
 255 # Helpers built in scripts/
 256 # ---------------------------------------------------------------------------
 257
 258 scripts/docproc scripts/fixdep scripts/split-include : scripts ;
 259
 260 .PHONY: scripts
 261 scripts:
 262         $(Q)$(MAKE) $(build)=scripts
 263
 264 # Objects we will link into vmlinux / subdirs we need to visit
 265 # ---------------------------------------------------------------------------
 266
 267 init-y          := init/
 268 drivers-y       := drivers/ sound/
 269 net-y           := net/
 270 libs-y          := lib/
 271 core-y          := usr/
 272 SUBDIRS         :=
 273
 274 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
 275
 276 export include_config := 1
 277
 278 -include .config
 279
 280 endif
 281
 282 include arch/$(ARCH)/Makefile
 283
 284 # Let architecture Makefiles change CPPFLAGS if needed
 285 CFLAGS += $(CPPFLAGS) $(CFLAGS)
 286 AFLAGS += $(CPPFLAGS) $(AFLAGS)
 287
 288 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/
 289
 290 SUBDIRS         += $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 291                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 292                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 293
 294 ALL_SUBDIRS     := $(sort $(SUBDIRS) $(patsubst %/,%,$(filter %/, \
 295                      $(init-n) $(init-) \
 296                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 297                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 298
 299 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 300 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 301 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 302 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 303 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 304 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 305 libs-y          := $(libs-y1) $(libs-y2)
 306
 307 ifdef include_config
 308
 309 # Here goes the main Makefile
 310 # ===========================================================================
 311 #
 312 # If the user gave a *config target, it'll be handled in another
 313 # section below, since in this case we cannot include .config
 314 # Same goes for other targets like clean/mrproper etc, which
 315 # don't need .config, either
 316
 317 #       In this section, we need .config
 318
 319 -include .config.cmd
 320
 321 ifndef CONFIG_FRAME_POINTER
 322 CFLAGS          += -fomit-frame-pointer
 323 endif
 324
 325 ifdef CONFIG_DEBUG_INFO
 326 CFLAGS          += -g
 327 endif
 328
 329 #
 330 # INSTALL_PATH specifies where to place the updated kernel and system map
 331 # images.  Uncomment if you want to place them anywhere other than root.
 332 #
 333
 334 #export INSTALL_PATH=/boot
 335
 336 #
 337 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 338 # relocations required by build roots.  This is not defined in the
 339 # makefile but the arguement can be passed to make if needed.
 340 #
 341
 342 MODLIB  := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 343 export MODLIB
 344
 345 # Build vmlinux
 346 # ---------------------------------------------------------------------------
 347
 348 #       This is a bit tricky: If we need to relink vmlinux, we want
 349 #       the version number incremented, which means recompile init/version.o
 350 #       and relink init/init.o. However, we cannot do this during the
 351 #       normal descending-into-subdirs phase, since at that time
 352 #       we cannot yet know if we will need to relink vmlinux.
 353 #       So we descend into init/ inside the rule for vmlinux again.
 354 head-y += $(HEAD)
 355 vmlinux-objs := $(head-y) $(init-y) $(core-y) $(libs-y) $(drivers-y) $(net-y)
 356
 357 quiet_cmd_vmlinux__ = LD      $@
 358 define cmd_vmlinux__
 359         $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) $(head-y) $(init-y) \
 360         --start-group \
 361         $(core-y) \
 362         $(libs-y) \
 363         $(drivers-y) \
 364         $(net-y) \
 365         --end-group \
 366         $(filter .tmp_kallsyms%,$^) \
 367         -o $@
 368 endef
 369
 370 #       set -e makes the rule exit immediately on error
 371
 372 define rule_vmlinux__
 373         +set -e;                                                        \
 374         $(if $(filter .tmp_kallsyms%,$^),,                              \
 375           echo '  GEN     .version';                                    \
 376           . $(srctree)/scripts/mkversion > .tmp_version;                \
 377           mv -f .tmp_version .version;                                  \
 378           $(MAKE) $(build)=init;                                        \
 379         )                                                               \
 380         $(if $($(quiet)cmd_vmlinux__),                                  \
 381           echo '  $($(quiet)cmd_vmlinux__)' &&)                         \
 382         $(cmd_vmlinux__);                                               \
 383         echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 384 endef
 385
 386 define rule_vmlinux
 387         $(rule_vmlinux__); \
 388         $(NM) $@ | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort > System.map
 389 endef
 390
 391 LDFLAGS_vmlinux += -T arch/$(ARCH)/vmlinux.lds.s
 392
 393 #       Generate section listing all symbols and add it into vmlinux
 394 #       It's a three stage process:
 395 #       o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 396 #         empty
 397 #         Running kallsyms on that gives us .tmp_kallsyms1.o with
 398 #         the right size
 399 #       o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 400 #         but due to the added section, some addresses have shifted
 401 #         From here, we generate a correct .tmp_kallsyms2.o
 402 #       o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 403
 404 ifdef CONFIG_KALLSYMS
 405
 406 kallsyms.o := .tmp_kallsyms2.o
 407
 408 quiet_cmd_kallsyms = KSYM    $@
 409 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) > $@
 410
 411 .tmp_kallsyms1.o .tmp_kallsyms2.o: %.o: %.S scripts FORCE
 412         $(call if_changed_dep,as_o_S)
 413
 414 .tmp_kallsyms%.S: .tmp_vmlinux%
 415         $(call cmd,kallsyms)
 416
 417 .tmp_vmlinux1: $(vmlinux-objs) arch/$(ARCH)/vmlinux.lds.s FORCE
 418         +$(call if_changed_rule,vmlinux__)
 419
 420 .tmp_vmlinux2: $(vmlinux-objs) .tmp_kallsyms1.o arch/$(ARCH)/vmlinux.lds.s FORCE
 421         $(call if_changed_rule,vmlinux__)
 422
 423 endif
 424
 425 #       Finally the vmlinux rule
 426
 427 vmlinux: $(vmlinux-objs) $(kallsyms.o) arch/$(ARCH)/vmlinux.lds.s FORCE
 428         $(call if_changed_rule,vmlinux)
 429
 430 #       The actual objects are generated when descending,
 431 #       make sure no implicit rule kicks in
 432
 433 $(sort $(vmlinux-objs)): $(SUBDIRS) ;
 434
 435 #       Handle descending into subdirectories listed in $(SUBDIRS)
 436
 437 .PHONY: $(SUBDIRS)
 438 $(SUBDIRS): prepare
 439         $(Q)$(MAKE) $(build)=$@
 440
 441 #       Things we need done before we descend to build or make
 442 #       module versions are listed in "prepare"
 443
 444 .PHONY: prepare
 445 prepare: include/linux/version.h include/asm include/config/MARKER
 446 ifdef KBUILD_MODULES
 447 ifeq ($(origin SUBDIRS),file)
 448         $(Q)rm -rf $(MODVERDIR)
 449 else
 450         @echo '*** Warning: Overriding SUBDIRS on the command line can cause'
 451         @echo '***          inconsistencies'
 452 endif
 453 endif
 454         $(if $(CONFIG_MODULES),$(Q)mkdir -p $(MODVERDIR))
 455
 456 #       This can be used by arch/$ARCH/Makefile to preprocess
 457 #       their vmlinux.lds.S file
 458
 459 AFLAGS_vmlinux.lds.o += -P -C -U$(ARCH)
 460
 461 arch/$(ARCH)/vmlinux.lds.s: %.s: %.S scripts FORCE
 462         $(call if_changed_dep,as_s_S)
 463
 464 targets += arch/$(ARCH)/vmlinux.lds.s
 465
 466 # Single targets
 467 # ---------------------------------------------------------------------------
 468
 469 %.s: %.c scripts FORCE
 470         $(Q)$(MAKE) $(build)=$(@D) $@
 471 %.i: %.c scripts FORCE
 472         $(Q)$(MAKE) $(build)=$(@D) $@
 473 %.o: %.c scripts FORCE
 474         $(Q)$(MAKE) $(build)=$(@D) $@
 475 %/:      scripts prepare FORCE
 476         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
 477 %.lst: %.c scripts FORCE
 478         $(Q)$(MAKE) $(build)=$(@D) $@
 479 %.s: %.S scripts FORCE
 480         $(Q)$(MAKE) $(build)=$(@D) $@
 481 %.o: %.S scripts FORCE
 482         $(Q)$(MAKE) $(build)=$(@D) $@
 483
 484 #       FIXME: The asm symlink changes when $(ARCH) changes. That's
 485 #       hard to detect, but I suppose "make mrproper" is a good idea
 486 #       before switching between archs anyway.
 487
 488 include/asm:
 489         @echo '  Making asm->asm-$(ARCH) symlink'
 490         @ln -s asm-$(ARCH) $@
 491
 492 #       Split autoconf.h into include/linux/config/*
 493
 494 include/config/MARKER: scripts/split-include include/linux/autoconf.h
 495         @echo '  SPLIT   include/linux/autoconf.h -> include/config/*'
 496         @scripts/split-include include/linux/autoconf.h include/config
 497         @touch $@
 498
 499 #       if .config is newer than include/linux/autoconf.h, someone tinkered
 500 #       with it and forgot to run make oldconfig
 501
 502 include/linux/autoconf.h: .config scripts/fixdep
 503         $(Q)$(MAKE) $(build)=scripts/kconfig scripts/kconfig/conf
 504         ./scripts/kconfig/conf -s arch/$(ARCH)/Kconfig
 505
 506 # Generate some files
 507 # ---------------------------------------------------------------------------
 508
 509 #       version.h changes when $(KERNELRELEASE) etc change, as defined in
 510 #       this Makefile
 511
 512 uts_len := 64
 513
 514 define filechk_version.h
 515         if expr length "$(KERNELRELEASE)" \> $(uts_len) >/dev/null ; then \
 516           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 517           exit 1; \
 518         fi; \
 519         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
 520           echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
 521          echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
 522         )
 523 endef
 524
 525 include/linux/version.h: Makefile
 526         $(call filechk,version.h)
 527
 528 # ---------------------------------------------------------------------------
 529
 530 .PHONY: depend dep
 531 depend dep:
 532         @echo '*** Warning: make $@ is unnecessary now.'
 533
 534 # ---------------------------------------------------------------------------
 535 # Modules
 536
 537 ifdef CONFIG_MODULES
 538
 539 #       By default, build modules as well
 540
 541 all: modules
 542
 543 #       Build modules
 544
 545 .PHONY: modules
 546 modules: $(SUBDIRS) $(if $(KBUILD_BUILTIN),vmlinux)
 547         @echo '  Building modules, stage 2.';
 548         $(Q)$(MAKE) -rR -f scripts/Makefile.modpost
 549
 550 #       Install modules
 551
 552 .PHONY: modules_install
 553 modules_install: _modinst_ _modinst_post
 554
 555 .PHONY: _modinst_
 556 _modinst_:
 557         @rm -rf $(MODLIB)/kernel
 558         @rm -f $(MODLIB)/build
 559         @mkdir -p $(MODLIB)/kernel
 560         @ln -s $(TOPDIR) $(MODLIB)/build
 561         $(Q)$(MAKE) -rR -f scripts/Makefile.modinst
 562
 563 # If System.map exists, run depmod.  This deliberately does not have a
 564 # dependency on System.map since that would run the dependency tree on
 565 # vmlinux.  This depmod is only for convenience to give the initial
 566 # boot a modules.dep even before / is mounted read-write.  However the
 567 # boot script depmod is the master version.
 568 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 569 depmod_opts     :=
 570 else
 571 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 572 endif
 573 .PHONY: _modinst_post
 574 _modinst_post: _modinst_
 575         if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 576
 577 else # CONFIG_MODULES
 578
 579 # Modules not configured
 580 # ---------------------------------------------------------------------------
 581
 582 modules modules_install: FORCE
 583         @echo
 584         @echo "The present kernel configuration has modules disabled."
 585         @echo "Type 'make config' and enable loadable module support."
 586         @echo "Then build a kernel with module support enabled."
 587         @echo
 588         @exit 1
 589
 590 endif # CONFIG_MODULES
 591
 592 # Generate asm-offsets.h
 593 # ---------------------------------------------------------------------------
 594
 595 define filechk_gen-asm-offsets
 596         (set -e; \
 597          echo "#ifndef __ASM_OFFSETS_H__"; \
 598          echo "#define __ASM_OFFSETS_H__"; \
 599          echo "/*"; \
 600          echo " * DO NOT MODIFY."; \
 601          echo " *"; \
 602          echo " * This file was generated by arch/$(ARCH)/Makefile"; \
 603          echo " *"; \
 604          echo " */"; \
 605          echo ""; \
 606          sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
 607          echo ""; \
 608          echo "#endif" )
 609 endef
 610
 611 else # ifdef include_config
 612
 613 ifeq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
 614
 615 # Targets which don't need .config
 616 # ===========================================================================
 617 #
 618 # These targets basically have their own Makefile - not quite, but at
 619 # least its own exclusive section in the same Makefile. The reason for
 620 # this is the following:
 621 # To know the configuration, the main Makefile has to include
 622 # .config. That's a obviously a problem when .config doesn't exist
 623 # yet, but that could be kludged around with only including it if it
 624 # exists.
 625 # However, the larger problem is: If you run make *config, make will
 626 # include the old .config, then execute your *config. It will then
 627 # notice that a piece it included (.config) did change and restart from
 628 # scratch. Which will cause execution of *config again. You get the
 629 # picture.
 630 # If we don't explicitly let the Makefile know that .config is changed
 631 # by *config (the old way), it won't reread .config after *config,
 632 # thus working with possibly stale values - we don't that either.
 633 #
 634 # So we divide things: This part here is for making *config targets,
 635 # and other targets which should work when no .config exists yet.
 636 # The main part above takes care of the rest after a .config exists.
 637
 638 # Kernel configuration
 639 # ---------------------------------------------------------------------------
 640
 641 .PHONY: oldconfig xconfig gconfig menuconfig config \
 642         make_with_config rpm
 643
 644 scripts/kconfig/conf scripts/kconfig/mconf scripts/kconfig/qconf scripts/kconfig/gconf: scripts/fixdep FORCE
 645         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 646
 647 xconfig: scripts/kconfig/qconf
 648         ./scripts/kconfig/qconf arch/$(ARCH)/Kconfig
 649
 650 gconfig: scripts/kconfig/gconf
 651         ./scripts/kconfig/gconf arch/$(ARCH)/Kconfig
 652
 653 menuconfig: scripts/kconfig/mconf
 654         $(Q)$(MAKE) $(build)=scripts/lxdialog
 655         ./scripts/kconfig/mconf arch/$(ARCH)/Kconfig
 656
 657 config: scripts/kconfig/conf
 658         ./scripts/kconfig/conf arch/$(ARCH)/Kconfig
 659
 660 oldconfig: scripts/kconfig/conf
 661         ./scripts/kconfig/conf -o arch/$(ARCH)/Kconfig
 662
 663 randconfig: scripts/kconfig/conf
 664         ./scripts/kconfig/conf -r arch/$(ARCH)/Kconfig
 665
 666 allyesconfig: scripts/kconfig/conf
 667         ./scripts/kconfig/conf -y arch/$(ARCH)/Kconfig
 668
 669 allnoconfig: scripts/kconfig/conf
 670         ./scripts/kconfig/conf -n arch/$(ARCH)/Kconfig
 671
 672 allmodconfig: scripts/kconfig/conf
 673         ./scripts/kconfig/conf -m arch/$(ARCH)/Kconfig
 674
 675 defconfig: scripts/kconfig/conf
 676         ./scripts/kconfig/conf -d arch/$(ARCH)/Kconfig
 677
 678 ###
 679 # Cleaning is done on three levels.
 680 # make clean     Delete all automatically generated files, including
 681 #                tools and firmware.
 682 # make mrproper  Delete the current configuration, and related files
 683 #                Any core files spread around are deleted as well
 684 # make distclean Remove editor backup files, patch leftover files and the like
 685
 686 # Files removed with 'make clean'
 687 CLEAN_FILES += vmlinux System.map MC*
 688
 689 # Files removed with 'make mrproper'
 690 MRPROPER_FILES += \
 691         include/linux/autoconf.h include/linux/version.h \
 692         .version .config .config.old config.in config.old \
 693         .menuconfig.log \
 694         include/asm \
 695         .hdepend include/linux/modversions.h \
 696         tags TAGS cscope kernel.spec \
 697         .tmp*
 698
 699 # Directories removed with 'make mrproper'
 700 MRPROPER_DIRS += \
 701         $(MODVERDIR) \
 702         .tmp_export-objs \
 703         include/config \
 704         include/linux/modules
 705
 706 # clean - Delete all intermediate files
 707 #
 708 clean-dirs += $(addprefix _clean_,$(ALL_SUBDIRS) Documentation/DocBook scripts)
 709 .PHONY: $(clean-dirs) clean archclean mrproper archmrproper distclean
 710 $(clean-dirs):
 711         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 712
 713 quiet_cmd_rmclean = RM  $$(CLEAN_FILES)
 714 cmd_rmclean       = rm -f $(CLEAN_FILES)
 715 clean: archclean $(clean-dirs)
 716         $(call cmd,rmclean)
 717         @find . $(RCS_FIND_IGNORE) \
 718                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 719                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
 720                 -type f -print | xargs rm -f
 721
 722 # mrproper - delete configuration + modules + core files
 723 #
 724 quiet_cmd_mrproper = RM  $$(MRPROPER_DIRS) + $$(MRPROPER_FILES)
 725 cmd_mrproper = rm -rf $(MRPROPER_DIRS) && rm -f $(MRPROPER_FILES)
 726 mrproper distclean: clean archmrproper
 727         @echo '  Making $@ in the srctree'
 728         @find . $(RCS_FIND_IGNORE) \
 729                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 730                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 731                 -o -name '.*.rej' -o -size 0 \
 732                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
 733                 -type f -print | xargs rm -f
 734         $(call cmd,mrproper)
 735
 736 # Generate tags for editors
 737 # ---------------------------------------------------------------------------
 738
 739 define all-sources
 740         ( find . $(RCS_FIND_IGNORE) \
 741                \( -name include -o -name arch \) -prune -o \
 742                -name '*.[chS]' -print; \
 743           find arch/$(ARCH) $(RCS_FIND_IGNORE) \
 744                -name '*.[chS]' -print; \
 745           find include $(RCS_FIND_IGNORE) \
 746                \( -name config -o -name 'asm-*' \) -prune \
 747                -o -name '*.[chS]' -print; \
 748           find include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
 749                -name '*.[chS]' -print; \
 750           find include/asm-generic $(RCS_FIND_IGNORE) \
 751                -name '*.[chS]' -print )
 752 endef
 753
 754 quiet_cmd_cscope = MAKE   $@
 755 cmd_cscope = $(all-sources) | cscope -k -b -i -
 756
 757 quiet_cmd_TAGS = MAKE   $@
 758 cmd_TAGS = $(all-sources) | etags -
 759
 760 #       Exuberant ctags works better with -I
 761
 762 quiet_cmd_tags = MAKE   $@
 763 define cmd_tags
 764         rm -f $@; \
 765         CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \
 766         $(all-sources) | xargs ctags $$CTAGSF -a
 767 endef
 768
 769 cscope: FORCE
 770         $(call cmd,cscope)
 771
 772 TAGS: FORCE
 773         $(call cmd,TAGS)
 774
 775 tags: FORCE
 776         $(call cmd,tags)
 777
 778 # RPM target
 779 # ---------------------------------------------------------------------------
 780
 781 #       If you do a make spec before packing the tarball you can rpm -ta it
 782
 783 spec:
 784         . $(srctree)/scripts/mkspec >kernel.spec
 785
 786 #       Build a tar ball, generate an rpm from it and pack the result
 787 #       There are two bits of magic here
 788 #       1) The use of /. to avoid tar packing just the symlink
 789 #       2) Removing the .dep files as they have source paths in them that
 790 #          will become invalid
 791
 792 rpm:    clean spec
 793         find . $(RCS_FIND_IGNORE) \
 794                 \( -size 0 -o -name .depend -o -name .hdepend \) \
 795                 -type f -print | xargs rm -f
 796         set -e; \
 797         cd $(TOPDIR)/.. ; \
 798         ln -sf $(TOPDIR) $(KERNELPATH) ; \
 799         tar -cvz $(RCS_TAR_IGNORE) -f $(KERNELPATH).tar.gz $(KERNELPATH)/. ; \
 800         rm $(KERNELPATH) ; \
 801         cd $(TOPDIR) ; \
 802         $(CONFIG_SHELL) $(srctree)/scripts/mkversion > .tmp_version ; \
 803         mv -f .tmp_version .version; \
 804         $(RPM) -ta $(TOPDIR)/../$(KERNELPATH).tar.gz ; \
 805         rm $(TOPDIR)/../$(KERNELPATH).tar.gz
 806
 807 # Brief documentation of the typical targets used
 808 # ---------------------------------------------------------------------------
 809
 810 help:
 811         @echo  'Cleaning targets:'
 812         @echo  '  clean           - remove most generated files but keep the config'
 813         @echo  '  mrproper        - remove all generated files + config + various backup files'
 814         @echo  ''
 815         @echo  'Configuration targets:'
 816         @echo  '  oldconfig       - Update current config utilising a line-oriented program'
 817         @echo  '  menuconfig      - Update current config utilising a menu based program'
 818         @echo  '  xconfig         - Update current config utilising a QT based front-end'
 819         @echo  '  gconfig         - Update current config utilising a GTK based front-end'
 820         @echo  '  defconfig       - New config with default answer to all options'
 821         @echo  '  allmodconfig    - New config selecting modules when possible'
 822         @echo  '  allyesconfig    - New config where all options are accepted with yes'
 823         @echo  '  allnoconfig     - New minimal config'
 824         @echo  ''
 825         @echo  'Other generic targets:'
 826         @echo  '  all             - Build all targets marked with [*]'
 827         @echo  '* vmlinux         - Build the bare kernel'
 828         @echo  '* modules         - Build all modules'
 829         @echo  '  modules_install - Install all modules'
 830         @echo  '  dir/            - Build all files in dir and below'
 831         @echo  '  dir/file.[ois]  - Build specified target only'
 832         @echo  '  rpm             - Build a kernel as an RPM package'
 833         @echo  '  tags/TAGS       - Generate tags file for editors'
 834         @echo  ''
 835         @echo  'Documentation targets:'
 836         @$(MAKE) --no-print-directory -f Documentation/DocBook/Makefile dochelp
 837         @echo  ''
 838         @echo  'Architecture specific targets ($(ARCH)):'
 839         @$(if $(archhelp),$(archhelp),\
 840                 echo '  No architecture specific help defined for $(ARCH)')
 841         @echo  ''
 842         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
 843         @echo  '  make C=1   [targets] Check all c source with checker tool'
 844         @echo  ''
 845         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
 846         @echo  'For further info see the ./README file'
 847
 848
 849 # Documentation targets
 850 # ---------------------------------------------------------------------------
 851 %docs: scripts/docproc FORCE
 852         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
 853
 854 # Scripts to check various things for consistency
 855 # ---------------------------------------------------------------------------
 856
 857 checkconfig:
 858         find * $(RCS_FIND_IGNORE) \
 859                 -name '*.[hcS]' -type f -print | sort \
 860                 | xargs $(PERL) -w scripts/checkconfig.pl
 861
 862 checkincludes:
 863         find * $(RCS_FIND_IGNORE) \
 864                 -name '*.[hcS]' -type f -print | sort \
 865                 | xargs $(PERL) -w scripts/checkincludes.pl
 866
 867 else # ifneq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
 868
 869 # We're called with both targets which do and do not need
 870 # .config included. Handle them one after the other.
 871 # ===========================================================================
 872
 873 %:: FORCE
 874         $(Q)$(MAKE) $@
 875
 876 endif # ifeq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
 877 endif # ifdef include_config
 878
 879 # FIXME Should go into a make.lib or something
 880 # ===========================================================================
 881
 882 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) $(NOSTDINC_FLAGS) \
 883           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
 884
 885 quiet_cmd_as_s_S = CPP     $@
 886 cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<
 887
 888 quiet_cmd_as_o_S = AS      $@
 889 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 890
 891 # read all saved command lines
 892
 893 targets := $(wildcard $(sort $(targets)))
 894 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 895
 896 ifneq ($(cmd_files),)
 897   include $(cmd_files)
 898 endif
 899
 900 # execute the command and also postprocess generated .d dependencies
 901 # file
 902
 903 if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
 904                           $(filter-out $(cmd_$(1)),$(cmd_$@))\
 905                           $(filter-out $(cmd_$@),$(cmd_$(1)))),\
 906         @set -e; \
 907         $(if $($(quiet)cmd_$(1)),echo '  $(subst ','\'',$($(quiet)cmd_$(1)))';) \
 908         $(cmd_$(1)); \
 909         scripts/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
 910         rm -f $(depfile); \
 911         mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
 912
 913 # Usage: $(call if_changed_rule,foo)
 914 # will check if $(cmd_foo) changed, or any of the prequisites changed,
 915 # and if so will execute $(rule_foo)
 916
 917 if_changed_rule = $(if $(strip $? \
 918                                $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
 919                                $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
 920                        @$(rule_$(1)))
 921
 922 # If quiet is set, only print short version of command
 923
 924 cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
 925
 926 # filechk is used to check if the content of a generated file is updated.
 927 # Sample usage:
 928 # define filechk_sample
 929 #       echo $KERNELRELEASE
 930 # endef
 931 # version.h : Makefile
 932 #       $(call filechk,sample)
 933 # The rule defined shall write to stdout the content of the new file.
 934 # The existing file will be compared with the new one.
 935 # - If no file exist it is created
 936 # - If the content differ the new file is used
 937 # - If they are equal no change, and no timestamp update
 938
 939 define filechk
 940         @set -e;                                \
 941         echo '  CHK     $@';                    \
 942         $(filechk_$(1)) < $< > $@.tmp;          \
 943         if [ -r $@ ] && cmp -s $@ $@.tmp; then  \
 944                 rm -f $@.tmp;                   \
 945         else                                    \
 946                 echo '  UPD     $@';            \
 947                 mv -f $@.tmp $@;                \
 948         fi
 949 endef
 950
 951 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir
 952 # Usage:
 953 # $(Q)$(MAKE) $(build)=dir
 954 build := -f scripts/Makefile.build obj
 955
 956 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
 957 # Usage:
 958 # $(Q)$(MAKE) $(clean)=dir
 959 clean := -f scripts/Makefile.clean obj
 960
 961 #       $(call descend,<dir>,<target>)
 962 #       Recursively call a sub-make in <dir> with target <target>
 963 # Usage is deprecated, because make does not see this as an invocation of make.
 964 descend =$(Q)$(MAKE) -f scripts/Makefile.build obj=$(1) $(2)
 965
 966 FORCE: