Makefile

   1 VERSION = 1
   2 PATCHLEVEL = 37
   3 SUBLEVEL = 0
   4 EXTRAVERSION = .git
   5 NAME = Unnamed
   6
   7 # *DOCUMENTATION*
   8 # To see a list of typical targets execute "make help"
   9 # More info can be located in ./README
  10 # Comments in this file are targeted only to the developer, do not
  11 # expect to learn how to build the kernel reading this file.
  12
  13 # Do not print "Entering directory ..."
  14 MAKEFLAGS += --no-print-directory
  15
  16 # We are using a recursive build, so we need to do a little thinking
  17 # to get the ordering right.
  18 #
  19 # Most importantly: sub-Makefiles should only ever modify files in
  20 # their own directory. If in some directory we have a dependency on
  21 # a file in another dir (which doesn't happen often, but it's often
  22 # unavoidable when linking the built-in.o targets which finally
  23 # turn into busybox), we will call a sub make in that other dir, and
  24 # after that we are sure that everything which is in that other dir
  25 # is now up to date.
  26 #
  27 # The only cases where we need to modify files which have global
  28 # effects are thus separated out and done before the recursive
  29 # descending is started. They are now explicitly listed as the
  30 # prepare rule.
  31
  32 # To put more focus on warnings, be less verbose as default
  33 # Use 'make V=1' to see the full commands
  34
  35 ifdef V
  36   ifeq ("$(origin V)", "command line")
  37     KBUILD_VERBOSE = $(V)
  38   endif
  39 endif
  40 ifndef KBUILD_VERBOSE
  41   KBUILD_VERBOSE = 0
  42 endif
  43
  44 # Call sparse as part of compilation of C files
  45 # Use 'make C=1' to enable sparse checking
  46
  47 ifdef C
  48   ifeq ("$(origin C)", "command line")
  49     KBUILD_CHECKSRC = $(C)
  50   endif
  51 endif
  52 ifndef KBUILD_CHECKSRC
  53   KBUILD_CHECKSRC = 0
  54 endif
  55
  56 # Use make M=dir to specify directory of external module to build
  57 # Old syntax make ... SUBDIRS=$PWD is still supported
  58 # Setting the environment variable KBUILD_EXTMOD take precedence
  59 ifdef SUBDIRS
  60   KBUILD_EXTMOD ?= $(SUBDIRS)
  61 endif
  62 ifdef M
  63   ifeq ("$(origin M)", "command line")
  64     KBUILD_EXTMOD := $(M)
  65   endif
  66 endif
  67
  68
  69 # kbuild supports saving output files in a separate directory.
  70 # To locate output files in a separate directory two syntaxes are supported.
  71 # In both cases the working directory must be the root of the kernel src.
  72 # 1) O=
  73 # Use "make O=dir/to/store/output/files/"
  74 #
  75 # 2) Set KBUILD_OUTPUT
  76 # Set the environment variable KBUILD_OUTPUT to point to the directory
  77 # where the output files shall be placed.
  78 # export KBUILD_OUTPUT=dir/to/store/output/files/
  79 # make
  80 #
  81 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  82 # variable.
  83
  84
  85 # KBUILD_SRC is set on invocation of make in OBJ directory
  86 # KBUILD_SRC is not intended to be used by the regular user (for now)
  87 ifeq ($(KBUILD_SRC),)
  88
  89 # OK, Make called in directory where kernel src resides
  90 # Do we want to locate output files in a separate directory?
  91 ifdef O
  92   ifeq ("$(origin O)", "command line")
  93     KBUILD_OUTPUT := $(O)
  94   endif
  95 endif
  96
  97 # That's our default target when none is given on the command line
  98 PHONY := _all
  99 _all:
 100
 101 ifneq ($(KBUILD_OUTPUT),)
 102 # Invoke a second make in the output directory, passing relevant variables
 103 # check that the output directory actually exists
 104 saved-output := $(KBUILD_OUTPUT)
 105 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 106 $(if $(KBUILD_OUTPUT),, \
 107      $(error output directory "$(saved-output)" does not exist))
 108
 109 PHONY += $(MAKECMDGOALS)
 110
 111 $(filter-out _all,$(MAKECMDGOALS)) _all:
 112         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 113         KBUILD_SRC=$(CURDIR) \
 114         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
 115
 116 # Leave processing to above invocation of make
 117 skip-makefile := 1
 118 endif # ifneq ($(KBUILD_OUTPUT),)
 119 endif # ifeq ($(KBUILD_SRC),)
 120
 121 # We process the rest of the Makefile if this is the final invocation of make
 122 ifeq ($(skip-makefile),)
 123
 124 # If building an external module we do not care about the all: rule
 125 # but instead _all depend on modules
 126 PHONY += all
 127 ifeq ($(KBUILD_EXTMOD),)
 128 _all: all
 129 else
 130 _all: modules
 131 endif
 132
 133 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 134 TOPDIR          := $(srctree)
 135 # FIXME - TOPDIR is obsolete, use srctree/objtree
 136 objtree         := $(CURDIR)
 137 src             := $(srctree)
 138 obj             := $(objtree)
 139
 140 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 141
 142 export srctree objtree VPATH TOPDIR
 143
 144
 145 # Cross compiling and selecting different set of gcc/bin-utils
 146 # ---------------------------------------------------------------------------
 147 #
 148 # When performing cross compilation for other architectures ARCH shall be set
 149 # to the target architecture. (See arch/* for the possibilities).
 150 # ARCH can be set during invocation of make:
 151 # make ARCH=ia64
 152 # Another way is to have ARCH set in the environment.
 153 # The default ARCH is the host where make is executed.
 154
 155 # CROSS_COMPILE specify the prefix used for all executables used
 156 # during compilation. Only gcc and related bin-utils executables
 157 # are prefixed with $(CROSS_COMPILE).
 158 # CROSS_COMPILE can be set on the command line
 159 # make CROSS_COMPILE=ia64-linux-
 160 # Alternatively CROSS_COMPILE can be set in the environment.
 161 # Default value for CROSS_COMPILE is not to prefix executables
 162 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 163
 164 CROSS_COMPILE ?=
 165 # bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config,
 166 # and it has not been included yet... thus using an awkward syntax.
 167 ifeq ($(CROSS_COMPILE),)
 168 CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null)
 169 CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE))
 170 CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE))
 171 #")
 172 endif
 173
 174 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 175 # first, and if a usermode build is happening, the "ARCH=um" on the command
 176 # line overrides the setting of ARCH below.  If a native build is happening,
 177 # then ARCH is assigned, getting whatever value it gets normally, and
 178 # SUBARCH is subsequently ignored.
 179
 180 ifneq ($(CROSS_COMPILE),)
 181 SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1 | sed 's:^.*/::g')
 182 else
 183 SUBARCH := $(shell uname -m)
 184 endif
 185 SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 186                                          -e s/arm.*/arm/ -e s/sa110/arm/ \
 187                                          -e s/s390x/s390/ -e s/parisc64/parisc/ \
 188                                          -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
 189
 190 ARCH ?= $(SUBARCH)
 191
 192 # Architecture as present in compile.h
 193 UTS_MACHINE := $(ARCH)
 194
 195 # SHELL used by kbuild
 196 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 197           else if [ -x /bin/bash ]; then echo /bin/bash; \
 198           else echo sh; fi ; fi)
 199
 200 #       Decide whether to build built-in, modular, or both.
 201 #       Normally, just do built-in.
 202
 203 KBUILD_MODULES :=
 204 KBUILD_BUILTIN := 1
 205
 206 #       If we have only "make modules", don't compile built-in objects.
 207 #       When we're building modules with modversions, we need to consider
 208 #       the built-in objects during the descend as well, in order to
 209 #       make sure the checksums are uptodate before we record them.
 210
 211 ifeq ($(MAKECMDGOALS),modules)
 212   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 213 endif
 214
 215 #       If we have "make <whatever> modules", compile modules
 216 #       in addition to whatever we do anyway.
 217 #       Just "make" or "make all" shall build modules as well
 218
 219 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 220   KBUILD_MODULES := 1
 221 endif
 222
 223 ifeq ($(MAKECMDGOALS),)
 224   KBUILD_MODULES := 1
 225 endif
 226
 227 export KBUILD_MODULES KBUILD_BUILTIN
 228 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 229
 230 # Beautify output
 231 # ---------------------------------------------------------------------------
 232 #
 233 # Normally, we echo the whole command before executing it. By making
 234 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 235 # $(quiet) to choose other forms of output instead, e.g.
 236 #
 237 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 238 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 239 #
 240 # If $(quiet) is empty, the whole command will be printed.
 241 # If it is set to "quiet_", only the short version will be printed.
 242 # If it is set to "silent_", nothing wil be printed at all, since
 243 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 244 #
 245 # A simple variant is to prefix commands with $(Q) - that's useful
 246 # for commands that shall be hidden in non-verbose mode.
 247 #
 248 #       $(Q)ln $@ :<
 249 #
 250 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 251 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 252
 253 ifeq ($(KBUILD_VERBOSE),1)
 254   quiet =
 255   Q =
 256 else
 257   quiet=quiet_
 258   Q = @
 259 endif
 260
 261 # If the user is running make -s (silent mode), suppress echoing of
 262 # commands
 263
 264 ifneq ($(findstring s,$(MAKEFLAGS)),)
 265   quiet=silent_
 266 endif
 267
 268 export quiet Q KBUILD_VERBOSE
 269
 270
 271 # Look for make include files relative to root of kernel src
 272 MAKEFLAGS += --include-dir=$(srctree)
 273
 274 HOSTCC          = gcc
 275 HOSTCXX         = g++
 276 HOSTCFLAGS      :=
 277 HOSTCXXFLAGS    :=
 278 # We need some generic definitions
 279 include $(srctree)/scripts/Kbuild.include
 280
 281 HOSTCFLAGS      += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,)
 282 HOSTCXXFLAGS    += -O2
 283
 284 # For maximum performance (+ possibly random breakage, uncomment
 285 # the following)
 286
 287 MAKEFLAGS += -rR
 288
 289 # Make variables (CC, etc...)
 290
 291 AS              = $(CROSS_COMPILE)as
 292 CC              = $(CROSS_COMPILE)gcc
 293 LD              = $(CC) -nostdlib
 294 CPP             = $(CC) -E
 295 AR              = $(CROSS_COMPILE)ar
 296 NM              = $(CROSS_COMPILE)nm
 297 STRIP           = $(CROSS_COMPILE)strip
 298 OBJCOPY         = $(CROSS_COMPILE)objcopy
 299 OBJDUMP         = $(CROSS_COMPILE)objdump
 300 PKG_CONFIG      ?= $(CROSS_COMPILE)pkg-config
 301 AWK             = awk
 302 GENKSYMS        = scripts/genksyms/genksyms
 303 DEPMOD          = /sbin/depmod
 304 KALLSYMS        = scripts/kallsyms
 305 PERL            = perl
 306 CHECK           = sparse
 307
 308 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 309 MODFLAGS        = -DMODULE
 310 CFLAGS_MODULE   = $(MODFLAGS)
 311 AFLAGS_MODULE   = $(MODFLAGS)
 312 LDFLAGS_MODULE  = -r
 313 CFLAGS_KERNEL   =
 314 AFLAGS_KERNEL   =
 315
 316
 317 # Use LINUXINCLUDE when you must reference the include/ directory.
 318 # Needed to be compatible with the O= option
 319 CFLAGS          := $(CFLAGS)
 320 # Added only to final link stage of busybox binary
 321 CFLAGS_busybox  := $(CFLAGS_busybox)
 322 CPPFLAGS        := $(CPPFLAGS)
 323 AFLAGS          := $(AFLAGS)
 324 LDFLAGS         := $(LDFLAGS)
 325 LDLIBS          :=
 326
 327 # Read KERNELRELEASE from .kernelrelease (if it exists)
 328 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
 329 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 330
 331 export  VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
 332         ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 333         CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 334         HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 335
 336 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 337 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 338 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 339 export FLTFLAGS
 340
 341 # When compiling out-of-tree modules, put MODVERDIR in the module
 342 # tree rather than in the kernel tree. The kernel tree might
 343 # even be read-only.
 344 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 345
 346 # Files to ignore in find ... statements
 347
 348 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
 349 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 350
 351 # ===========================================================================
 352 # Rules shared between *config targets and build targets
 353
 354 # Basic helpers built in scripts/
 355 PHONY += scripts_basic
 356 scripts_basic:
 357         $(Q)$(MAKE) $(build)=scripts/basic
 358
 359 # To avoid any implicit rule to kick in, define an empty command.
 360 scripts/basic/%: scripts_basic ;
 361
 362 # This target generates Kbuild's and Config.in's from *.c files
 363 PHONY += gen_build_files
 364 gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) $(wildcard $(srctree)/embed/*)
 365         $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree)
 366
 367 # bbox: we have helpers in applets/
 368 # we depend on scripts_basic, since scripts/basic/fixdep
 369 # must be built before any other host prog
 370 PHONY += applets_dir
 371 applets_dir: scripts_basic gen_build_files include/config/MARKER
 372         $(Q)$(MAKE) $(build)=applets
 373
 374 applets/%: applets_dir ;
 375
 376 PHONY += outputmakefile
 377 # outputmakefile generates a Makefile in the output directory, if using a
 378 # separate output directory. This allows convenient use of make in the
 379 # output directory.
 380 outputmakefile:
 381 ifneq ($(KBUILD_SRC),)
 382         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 383             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 384 endif
 385
 386 # To make sure we do not include .config for any of the *config targets
 387 # catch them early, and hand them over to scripts/kconfig/Makefile
 388 # It is allowed to specify more targets when calling make, including
 389 # mixing *config targets and build targets.
 390 # For example 'make oldconfig all'.
 391 # Detect when mixed targets is specified, and make a second invocation
 392 # of make so .config is not included in this case either (for *config).
 393
 394 no-dot-config-targets := clean mrproper distclean \
 395                          cscope TAGS tags help %docs
 396 #bbox# check% is removed from above
 397
 398 config-targets := 0
 399 mixed-targets  := 0
 400 dot-config     := 1
 401
 402 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 403         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 404                 dot-config := 0
 405         endif
 406 endif
 407
 408 ifeq ($(KBUILD_EXTMOD),)
 409         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 410                 config-targets := 1
 411                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 412                         mixed-targets := 1
 413                 endif
 414         endif
 415 endif
 416
 417 ifeq ($(mixed-targets),1)
 418 # ===========================================================================
 419 # We're called with mixed targets (*config and build targets).
 420 # Handle them one by one.
 421
 422 %:: FORCE
 423         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 424
 425 else
 426 ifeq ($(config-targets),1)
 427 # ===========================================================================
 428 # *config targets only - make sure prerequisites are updated, and descend
 429 # in scripts/kconfig to make the *config target
 430
 431 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 432 # KBUILD_DEFCONFIG may point out an alternative default configuration
 433 # used for 'make defconfig'
 434 -include $(srctree)/arch/$(ARCH)/Makefile
 435 export KBUILD_DEFCONFIG
 436
 437 config: scripts_basic outputmakefile gen_build_files FORCE
 438         $(Q)mkdir -p include
 439         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 440         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
 441
 442 %config: scripts_basic outputmakefile gen_build_files FORCE
 443         $(Q)mkdir -p include
 444         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 445         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
 446
 447 else
 448 # ===========================================================================
 449 # Build targets only - this includes busybox, arch specific targets, clean
 450 # targets and others. In general all targets except *config targets.
 451
 452 ifeq ($(KBUILD_EXTMOD),)
 453 # Additional helpers built in scripts/
 454 # Carefully list dependencies so we do not try to build scripts twice
 455 # in parallel
 456 PHONY += scripts
 457 scripts: gen_build_files scripts_basic include/config/MARKER
 458         $(Q)$(MAKE) $(build)=$(@)
 459
 460 scripts_basic: include/autoconf.h
 461
 462 # Objects we will link into busybox / subdirs we need to visit
 463 core-y          := \
 464                 applets/ \
 465
 466 libs-y          := \
 467                 archival/ \
 468                 archival/libarchive/ \
 469                 console-tools/ \
 470                 coreutils/ \
 471                 coreutils/libcoreutils/ \
 472                 debianutils/ \
 473                 klibc-utils/ \
 474                 e2fsprogs/ \
 475                 editors/ \
 476                 findutils/ \
 477                 init/ \
 478                 libbb/ \
 479                 libpwdgrp/ \
 480                 loginutils/ \
 481                 mailutils/ \
 482                 miscutils/ \
 483                 modutils/ \
 484                 networking/ \
 485                 networking/libiproute/ \
 486                 networking/udhcp/ \
 487                 printutils/ \
 488                 procps/ \
 489                 runit/ \
 490                 selinux/ \
 491                 shell/ \
 492                 sysklogd/ \
 493                 util-linux/ \
 494                 util-linux/volume_id/ \
 495
 496 endif # KBUILD_EXTMOD
 497
 498 ifeq ($(dot-config),1)
 499 # In this section, we need .config
 500
 501 # Read in dependencies to all Kconfig* files, make sure to run
 502 # oldconfig if changes are detected.
 503 -include .kconfig.d
 504
 505 -include .config
 506
 507 # If .config needs to be updated, it will be done via the dependency
 508 # that autoconf has on .config.
 509 # To avoid any implicit rule to kick in, define an empty command
 510 .config .kconfig.d: ;
 511
 512 -include $(srctree)/arch/$(ARCH)/Makefile
 513
 514 # Now we can define CFLAGS etc according to .config
 515 include $(srctree)/Makefile.flags
 516
 517 # If .config is newer than include/autoconf.h, someone tinkered
 518 # with it and forgot to run make oldconfig.
 519 # If kconfig.d is missing then we are probarly in a cleaned tree so
 520 # we execute the config step to be sure to catch updated Kconfig files
 521 include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files
 522         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 523
 524 include/usage.h: gen_build_files
 525
 526 else
 527 # Dummy target needed, because used as prerequisite
 528 include/autoconf.h: ;
 529 endif
 530
 531 # The all: target is the default when no target is given on the
 532 # command line.
 533 # This allow a user to issue only 'make' to build a kernel including modules
 534 # Defaults busybox but it is usually overridden in the arch makefile
 535 all: busybox doc
 536
 537 # arch Makefile may override CC so keep this after arch Makefile is included
 538 #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 539 CHECKFLAGS += $(NOSTDINC_FLAGS)
 540
 541 # Default kernel image to build when no specific target is given.
 542 # KBUILD_IMAGE may be overruled on the commandline or
 543 # set in the environment
 544 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 545 # this default value
 546 export KBUILD_IMAGE ?= busybox
 547
 548 #
 549 # INSTALL_PATH specifies where to place the updated kernel and system map
 550 # images. Default is /boot, but you can set it to other values
 551 export  INSTALL_PATH ?= /boot
 552
 553 #
 554 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 555 # relocations required by build roots.  This is not defined in the
 556 # makefile but the argument can be passed to make if needed.
 557 #
 558
 559 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 560 export MODLIB
 561
 562
 563 ifeq ($(KBUILD_EXTMOD),)
 564 busybox-dirs    := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
 565
 566 busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
 567                      $(core-n) $(core-) $(libs-n) $(libs-) \
 568                 )))
 569
 570 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 571 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 572 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 573 libs-y          := $(libs-y1) $(libs-y2)
 574
 575 # Build busybox
 576 # ---------------------------------------------------------------------------
 577 # busybox is build from the objects selected by $(busybox-init) and
 578 # $(busybox-main). Most are built-in.o files from top-level directories
 579 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
 580 # Ordering when linking is important, and $(busybox-init) must be first.
 581 #
 582 # busybox
 583 #   ^
 584 #   |
 585 #   +-< $(busybox-init)
 586 #   |   +--< init/version.o + more
 587 #   |
 588 #   +--< $(busybox-main)
 589 #   |    +--< driver/built-in.o mm/built-in.o + more
 590 #   |
 591 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 592 #
 593 # busybox version (uname -v) cannot be updated during normal
 594 # descending-into-subdirs phase since we do not yet know if we need to
 595 # update busybox.
 596 # Therefore this step is delayed until just before final link of busybox -
 597 # except in the kallsyms case where it is done just before adding the
 598 # symbols to the kernel.
 599 #
 600 # System.map is generated to document addresses of all kernel symbols
 601
 602 busybox-all  := $(core-y) $(libs-y)
 603
 604 # Rule to link busybox - also used during CONFIG_KALLSYMS
 605 # May be overridden by arch/$(ARCH)/Makefile
 606 quiet_cmd_busybox__ ?= LINK    $@
 607       cmd_busybox__ ?= $(srctree)/scripts/trylink \
 608       "$@" \
 609       "$(CC)" \
 610       "$(CFLAGS) $(CFLAGS_busybox)" \
 611       "$(LDFLAGS) $(EXTRA_LDFLAGS)" \
 612       "$(core-y)" \
 613       "$(libs-y)" \
 614       "$(LDLIBS)" \
 615       "$(CONFIG_EXTRA_LDLIBS)" \
 616       && $(srctree)/scripts/generate_BUFSIZ.sh --post include/common_bufsiz.h
 617
 618 # Generate System.map
 619 quiet_cmd_sysmap = SYSMAP
 620       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 621
 622 # Link of busybox
 623 # If CONFIG_KALLSYMS is set .version is already updated
 624 # Generate System.map and verify that the content is consistent
 625 # Use + in front of the busybox_version rule to silent warning with make -j2
 626 # First command is ':' to allow us to use + in front of the rule
 627 define rule_busybox__
 628         :
 629         $(call cmd,busybox__)
 630         $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
 631 endef
 632
 633
 634 ifdef CONFIG_KALLSYMS
 635 # Generate section listing all symbols and add it into busybox $(kallsyms.o)
 636 # It's a three stage process:
 637 # o .tmp_busybox1 has all symbols and sections, but __kallsyms is
 638 #   empty
 639 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 640 #   the right size - busybox version (uname -v) is updated during this step
 641 # o .tmp_busybox2 now has a __kallsyms section of the right size,
 642 #   but due to the added section, some addresses have shifted.
 643 #   From here, we generate a correct .tmp_kallsyms2.o
 644 # o The correct .tmp_kallsyms2.o is linked into the final busybox.
 645 # o Verify that the System.map from busybox matches the map from
 646 #   .tmp_busybox2, just in case we did not generate kallsyms correctly.
 647 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 648 #   .tmp_busybox3 and .tmp_kallsyms3.o.  This is only meant as a
 649 #   temporary bypass to allow the kernel to be built while the
 650 #   maintainers work out what went wrong with kallsyms.
 651
 652 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 653 last_kallsyms := 3
 654 else
 655 last_kallsyms := 2
 656 endif
 657
 658 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 659
 660 define verify_kallsyms
 661         $(Q)$(if $($(quiet)cmd_sysmap),                       \
 662           echo '  $($(quiet)cmd_sysmap) .tmp_System.map' &&)  \
 663           $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
 664         $(Q)cmp -s System.map .tmp_System.map ||              \
 665                 (echo Inconsistent kallsyms data;             \
 666                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
 667                  rm .tmp_kallsyms* ; /bin/false )
 668 endef
 669
 670 # Update busybox version before link
 671 # Use + in front of this rule to silent warning about make -j1
 672 # First command is ':' to allow us to use + in front of this rule
 673 cmd_ksym_ld = $(cmd_busybox__)
 674 define rule_ksym_ld
 675         :
 676         +$(call cmd,busybox_version)
 677         $(call cmd,busybox__)
 678         $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
 679 endef
 680
 681 # Generate .S file with all kernel symbols
 682 quiet_cmd_kallsyms = KSYM    $@
 683       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 684                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 685
 686 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 687         $(call if_changed_dep,as_o_S)
 688
 689 .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
 690         $(call cmd,kallsyms)
 691
 692 # .tmp_busybox1 must be complete except kallsyms, so update busybox version
 693 .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
 694         $(call if_changed_rule,ksym_ld)
 695
 696 .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
 697         $(call if_changed,busybox__)
 698
 699 .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
 700         $(call if_changed,busybox__)
 701
 702 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 703 $(KALLSYMS): scripts ;
 704
 705 # Generate some data for debugging strange kallsyms problems
 706 debug_kallsyms: .tmp_map$(last_kallsyms)
 707
 708 .tmp_map%: .tmp_busybox% FORCE
 709         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 710
 711 .tmp_map3: .tmp_map2
 712
 713 .tmp_map2: .tmp_map1
 714
 715 endif # ifdef CONFIG_KALLSYMS
 716
 717 # busybox image - including updated kernel symbols
 718 busybox_unstripped: $(busybox-all) FORCE
 719         $(call if_changed_rule,busybox__)
 720         $(Q)rm -f .old_version
 721
 722 busybox: busybox_unstripped
 723 ifeq ($(SKIP_STRIP),y)
 724         $(Q)cp $< $@
 725 else
 726         $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
 727                 busybox_unstripped -o $@
 728 # strip is confused by PIE executable and does not set exec bits
 729         $(Q)chmod a+x $@
 730 endif
 731
 732 # The actual objects are generated when descending,
 733 # make sure no implicit rule kicks in
 734 $(sort $(busybox-all)): $(busybox-dirs) ;
 735
 736 # Handle descending into subdirectories listed in $(busybox-dirs)
 737 # Preset locale variables to speed up the build process. Limit locale
 738 # tweaks to this spot to avoid wrong language settings when running
 739 # make menuconfig etc.
 740 # Error messages still appears in the original language
 741
 742 PHONY += $(busybox-dirs)
 743 $(busybox-dirs): prepare scripts
 744         $(Q)$(MAKE) $(build)=$@
 745
 746 # Build the kernel release string
 747 # The KERNELRELEASE is stored in a file named .kernelrelease
 748 # to be used when executing for example make install or make modules_install
 749 #
 750 # Take the contents of any files called localversion* and the config
 751 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
 752 # LOCALVERSION from the command line override all of this
 753
 754 nullstring :=
 755 space      := $(nullstring) # end of line
 756
 757 ___localver = $(objtree)/localversion* $(srctree)/localversion*
 758 __localver  = $(sort $(wildcard $(___localver)))
 759 # skip backup files (containing '~')
 760 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
 761
 762 localver = $(subst $(space),, \
 763            $(shell cat /dev/null $(_localver)) \
 764            $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 765
 766 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 767 # and if the SCM is know a tag from the SCM is appended.
 768 # The appended tag is determinded by the SCM used.
 769 #
 770 # Currently, only git is supported.
 771 # Other SCMs can edit scripts/setlocalversion and add the appropriate
 772 # checks as needed.
 773 ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO
 774         _localver-auto = $(shell $(CONFIG_SHELL) \
 775                           $(srctree)/scripts/setlocalversion $(srctree))
 776         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 777 endif
 778
 779 localver-full = $(localver)$(localver-auto)
 780
 781 # Store (new) KERNELRELASE string in .kernelrelease
 782 kernelrelease = $(KERNELVERSION)$(localver-full)
 783 .kernelrelease: FORCE
 784         $(Q)rm -f $@
 785         $(Q)echo $(kernelrelease) > $@
 786
 787
 788 # Things we need to do before we recursively start building the kernel
 789 # or the modules are listed in "prepare".
 790 # A multi level approach is used. prepareN is processed before prepareN-1.
 791 # archprepare is used in arch Makefiles and when processed asm symlink,
 792 # version.h and scripts_basic is processed / created.
 793
 794 # Listed in dependency order
 795 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 796
 797 # prepare-all is deprecated, use prepare as valid replacement
 798 PHONY += prepare-all
 799
 800 # prepare3 is used to check if we are building in a separate output directory,
 801 # and if so do:
 802 # 1) Check that make has not been executed in the kernel src $(srctree)
 803 # 2) Create the include2 directory, used for the second asm symlink
 804 prepare3: .kernelrelease
 805 ifneq ($(KBUILD_SRC),)
 806         @echo '  Using $(srctree) as source for busybox'
 807         $(Q)if [ -f $(srctree)/.config ]; then \
 808                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 809                 echo "  in the '$(srctree)' directory.";\
 810                 /bin/false; \
 811         fi;
 812         $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
 813         $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
 814 endif
 815
 816 # prepare2 creates a makefile if using a separate output directory
 817 prepare2: prepare3 outputmakefile
 818
 819 prepare1: prepare2 include/config/MARKER
 820 ifneq ($(KBUILD_MODULES),)
 821         $(Q)mkdir -p $(MODVERDIR)
 822         $(Q)rm -f $(MODVERDIR)/*
 823 endif
 824
 825 archprepare: prepare1 scripts_basic applets_dir
 826
 827 prepare0: archprepare FORCE
 828         $(Q)$(MAKE) $(build)=.
 829
 830 # All the preparing..
 831 prepare prepare-all: prepare0
 832
 833 #       Leave this as default for preprocessing busybox.lds.S, which is now
 834 #       done in arch/$(ARCH)/kernel/Makefile
 835
 836 export CPPFLAGS_busybox.lds += -P -C -U$(ARCH)
 837
 838 #       FIXME: The asm symlink changes when $(ARCH) changes. That's
 839 #       hard to detect, but I suppose "make mrproper" is a good idea
 840 #       before switching between archs anyway.
 841
 842 #bbox# include/asm:
 843 #bbox#  @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
 844 #bbox#  $(Q)if [ ! -d include ]; then mkdir -p include; fi;
 845 #bbox#  @ln -fsn asm-$(ARCH) $@
 846
 847 #       Split autoconf.h into include/linux/config/*
 848 quiet_cmd_gen_bbconfigopts = GEN     include/bbconfigopts.h
 849       cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs include/bbconfigopts.h include/bbconfigopts_bz2.h
 850 quiet_cmd_gen_common_bufsiz = GEN     include/common_bufsiz.h
 851       cmd_gen_common_bufsiz = $(srctree)/scripts/generate_BUFSIZ.sh include/common_bufsiz.h
 852 quiet_cmd_split_autoconf   = SPLIT   include/autoconf.h -> include/config/*
 853       cmd_split_autoconf   = scripts/basic/split-include include/autoconf.h include/config
 854 quiet_cmd_gen_embedded_scripts = GEN     include/embedded_scripts.h
 855       cmd_gen_embedded_scripts = $(srctree)/scripts/embedded_scripts include/embedded_scripts.h $(srctree)/embed $(srctree)/applets_sh
 856 #bbox# piggybacked generation of few .h files
 857 include/config/MARKER: scripts/basic/split-include include/autoconf.h $(wildcard $(srctree)/embed/*) $(wildcard $(srctree)/applets_sh/*) $(srctree)/scripts/embedded_scripts
 858         $(call cmd,split_autoconf)
 859         $(call cmd,gen_bbconfigopts)
 860         $(call cmd,gen_common_bufsiz)
 861         $(call cmd,gen_embedded_scripts)
 862         @touch $@
 863
 864 # Generate some files
 865 # ---------------------------------------------------------------------------
 866
 867 # KERNELRELEASE can change from a few different places, meaning version.h
 868 # needs to be updated, so this check is forced on all builds
 869
 870 uts_len := 64
 871
 872 define filechk_version.h
 873         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 874           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
 875           exit 1; \
 876         fi; \
 877         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
 878           echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
 879          echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
 880         )
 881 endef
 882
 883 # ---------------------------------------------------------------------------
 884
 885 PHONY += depend dep
 886 depend dep:
 887         @echo '*** Warning: make $@ is unnecessary now.'
 888
 889 # ---------------------------------------------------------------------------
 890 # Modules
 891
 892 ifdef _BB_DISABLED_CONFIG_MODULES
 893
 894 #       By default, build modules as well
 895
 896 all: modules
 897
 898 #       Build modules
 899
 900 PHONY += modules
 901 modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
 902         @echo '  Building modules, stage 2.';
 903         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
 904
 905
 906 # Target to prepare building external modules
 907 PHONY += modules_prepare
 908 modules_prepare: prepare scripts
 909
 910 # Target to install modules
 911 PHONY += modules_install
 912 modules_install: _modinst_ _modinst_post
 913
 914 PHONY += _modinst_
 915 _modinst_:
 916         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
 917                 echo "Warning: you may need to install module-init-tools"; \
 918                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
 919                 sleep 1; \
 920         fi
 921         @rm -rf $(MODLIB)/kernel
 922         @rm -f $(MODLIB)/source
 923         @mkdir -p $(MODLIB)/kernel
 924         @ln -s $(srctree) $(MODLIB)/source
 925         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 926                 rm -f $(MODLIB)/build ; \
 927                 ln -s $(objtree) $(MODLIB)/build ; \
 928         fi
 929         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
 930
 931 # If System.map exists, run depmod.  This deliberately does not have a
 932 # dependency on System.map since that would run the dependency tree on
 933 # busybox.  This depmod is only for convenience to give the initial
 934 # boot a modules.dep even before / is mounted read-write.  However the
 935 # boot script depmod is the master version.
 936 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
 937 depmod_opts     :=
 938 else
 939 depmod_opts     := -b $(INSTALL_MOD_PATH) -r
 940 endif
 941 PHONY += _modinst_post
 942 _modinst_post: _modinst_
 943         if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
 944
 945 else # CONFIG_MODULES
 946
 947 # Modules not configured
 948 # ---------------------------------------------------------------------------
 949
 950 modules modules_install: FORCE
 951         @echo
 952         @echo "The present busybox configuration has modules disabled."
 953         @echo "Type 'make config' and enable loadable module support."
 954         @echo "Then build a kernel with module support enabled."
 955         @echo
 956         @exit 1
 957
 958 endif # CONFIG_MODULES
 959
 960 ###
 961 # Cleaning is done on three levels.
 962 # make clean     Delete most generated files
 963 #                Leave enough to build external modules
 964 # make mrproper  Delete the current configuration, and all generated files
 965 # make distclean Remove editor backup files, patch leftover files and the like
 966
 967 # Directories & files removed with 'make clean'
 968 CLEAN_DIRS  += $(MODVERDIR) _install 0_lib
 969 CLEAN_FILES +=  busybox busybox_unstripped* busybox.links \
 970                 busybox*.suid busybox*.nosuid \
 971                 System.map .kernelrelease \
 972                 .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
 973
 974 # Directories & files removed with 'make mrproper'
 975 MRPROPER_DIRS  += include/config include2
 976 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
 977                   include/NUM_APPLETS.h \
 978                   include/common_bufsiz.h \
 979                   include/autoconf.h \
 980                   include/bbconfigopts.h \
 981                   include/bbconfigopts_bz2.h \
 982                   include/embedded_scripts.h \
 983                   include/usage_compressed.h \
 984                   include/applet_tables.h \
 985                   include/applets.h \
 986                   include/usage.h \
 987                   applets/usage \
 988                   .kernelrelease Module.symvers tags TAGS cscope* \
 989                   busybox_old
 990
 991 # clean - Delete most, but leave enough to build external modules
 992 #
 993 clean: rm-dirs  := $(CLEAN_DIRS)
 994 clean: rm-files := $(CLEAN_FILES)
 995 clean-dirs      := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
 996
 997 PHONY += $(clean-dirs) clean archclean
 998 $(clean-dirs):
 999         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1000
1001 clean: archclean $(clean-dirs)
1002         $(call cmd,rmdirs)
1003         $(call cmd,rmfiles)
1004         @find . $(RCS_FIND_IGNORE) \
1005                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1006                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1007                 -type f -print | xargs rm -f
1008
1009 PHONY += doc-clean
1010 doc-clean: rm-files := docs/busybox.pod \
1011                   docs/BusyBox.html docs/busybox.1 docs/BusyBox.txt
1012 doc-clean:
1013         $(call cmd,rmfiles)
1014
1015 # mrproper - Delete all generated files, including .config
1016 #
1017 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1018 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1019 mrproper-dirs      := $(addprefix _mrproper_,scripts)
1020
1021 PHONY += $(mrproper-dirs) mrproper archmrproper
1022 $(mrproper-dirs):
1023         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1024
1025 mrproper: clean archmrproper $(mrproper-dirs)
1026         $(call cmd,rmdirs)
1027         $(call cmd,rmfiles)
1028         @find . -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f
1029         @find . -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f
1030
1031 # distclean
1032 #
1033 PHONY += distclean
1034
1035 distclean: mrproper
1036         @find $(srctree) $(RCS_FIND_IGNORE) \
1037                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1038                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1039                 -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \
1040                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1041                 -type f -print | xargs rm -f
1042
1043
1044 # Packaging of the kernel to various formats
1045 # ---------------------------------------------------------------------------
1046 # rpm target kept for backward compatibility
1047 package-dir     := $(srctree)/scripts/package
1048
1049 %pkg: FORCE
1050         $(Q)$(MAKE) $(build)=$(package-dir) $@
1051 rpm: FORCE
1052         $(Q)$(MAKE) $(build)=$(package-dir) $@
1053
1054
1055 # Brief documentation of the typical targets used
1056 # ---------------------------------------------------------------------------
1057
1058 boards := $(wildcard $(srctree)/configs/*_defconfig)
1059 boards := $(notdir $(boards))
1060
1061 -include $(srctree)/Makefile.help
1062
1063 # Documentation targets
1064 # ---------------------------------------------------------------------------
1065 %docs: scripts_basic FORCE
1066         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1067
1068 else # KBUILD_EXTMOD
1069
1070 ###
1071 # External module support.
1072 # When building external modules the kernel used as basis is considered
1073 # read-only, and no consistency checks are made and the make
1074 # system is not used on the basis kernel. If updates are required
1075 # in the basis kernel ordinary make commands (without M=...) must
1076 # be used.
1077 #
1078 # The following are the only valid targets when building external
1079 # modules.
1080 # make M=dir clean     Delete all automatically generated files
1081 # make M=dir modules   Make all modules in specified dir
1082 # make M=dir           Same as 'make M=dir modules'
1083 # make M=dir modules_install
1084 #                      Install the modules build in the module directory
1085 #                      Assumes install directory is already created
1086
1087 # We are always building modules
1088 KBUILD_MODULES := 1
1089 PHONY += crmodverdir
1090 crmodverdir:
1091         $(Q)mkdir -p $(MODVERDIR)
1092         $(Q)rm -f $(MODVERDIR)/*
1093
1094 PHONY += $(objtree)/Module.symvers
1095 $(objtree)/Module.symvers:
1096         @test -e $(objtree)/Module.symvers || ( \
1097         echo; \
1098         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1099         echo "           is missing; modules will have no dependencies and modversions."; \
1100         echo )
1101
1102 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1103 PHONY += $(module-dirs) modules
1104 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1105         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1106
1107 modules: $(module-dirs)
1108         @echo '  Building modules, stage 2.';
1109         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1110
1111 PHONY += modules_install
1112 modules_install: _emodinst_ _emodinst_post
1113
1114 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1115 PHONY += _emodinst_
1116 _emodinst_:
1117         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1118         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1119
1120 # Run depmod only is we have System.map and depmod is executable
1121 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1122       cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1123                       $(DEPMOD) -ae -F System.map             \
1124                       $(if $(strip $(INSTALL_MOD_PATH)),      \
1125                       -b $(INSTALL_MOD_PATH) -r)              \
1126                       $(KERNELRELEASE);                       \
1127                    fi
1128
1129 PHONY += _emodinst_post
1130 _emodinst_post: _emodinst_
1131         $(call cmd,depmod)
1132
1133 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1134
1135 PHONY += $(clean-dirs) clean
1136 $(clean-dirs):
1137         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1138
1139 clean:  rm-dirs := $(MODVERDIR)
1140 clean: $(clean-dirs)
1141         $(call cmd,rmdirs)
1142         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1143                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1144                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1145                 -type f -print | xargs rm -f
1146
1147 # Dummies...
1148 PHONY += prepare scripts
1149 prepare: ;
1150 scripts: ;
1151 endif # KBUILD_EXTMOD
1152
1153 # Generate tags for editors
1154 # ---------------------------------------------------------------------------
1155
1156 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1157 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1158 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1159
1160 ifeq ($(src),$(obj))
1161 __srctree =
1162 else
1163 __srctree = $(srctree)/
1164 endif
1165
1166 ifeq ($(ALLSOURCE_ARCHS),)
1167 ifeq ($(ARCH),um)
1168 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1169 else
1170 ALLINCLUDE_ARCHS := $(ARCH)
1171 endif
1172 else
1173 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1174 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1175 endif
1176
1177 ALLSOURCE_ARCHS := $(ARCH)
1178
1179 define all-sources
1180         ( find -regex '.*\.[ch]$$' )
1181 endef
1182
1183 quiet_cmd_cscope-file = FILELST cscope.files
1184       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1185
1186 quiet_cmd_cscope = MAKE    cscope.out
1187       cmd_cscope = cscope -b
1188
1189 cscope: FORCE
1190         $(call cmd,cscope-file)
1191         $(call cmd,cscope)
1192
1193 quiet_cmd_TAGS = MAKE   $@
1194 define cmd_TAGS
1195         rm -f $@; \
1196         ETAGSF=`etags --version | grep -i exuberant >/dev/null &&     \
1197                 echo "-I __initdata,__exitdata,__acquires,__releases  \
1198                       -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1199                       --extra=+f --c-kinds=+px"`;                     \
1200                 $(all-sources) | xargs etags $$ETAGSF -a
1201 endef
1202
1203 TAGS: FORCE
1204         $(call cmd,TAGS)
1205
1206
1207 quiet_cmd_tags = MAKE   $@
1208 define cmd_tags
1209         rm -f $@; \
1210         CTAGSF=`ctags --version | grep -i exuberant >/dev/null &&     \
1211                 echo "-I __initdata,__exitdata,__acquires,__releases  \
1212                       -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1213                       --extra=+f --c-kinds=+px"`;                     \
1214                 $(all-sources) | xargs ctags $$CTAGSF -a
1215 endef
1216
1217 tags: FORCE
1218         $(call cmd,tags)
1219
1220
1221 # Scripts to check various things for consistency
1222 # ---------------------------------------------------------------------------
1223
1224 includecheck:
1225         find * $(RCS_FIND_IGNORE) \
1226                 -name '*.[hcS]' -type f -print | sort \
1227                 | xargs $(PERL) -w scripts/checkincludes.pl
1228
1229 versioncheck:
1230         find * $(RCS_FIND_IGNORE) \
1231                 -name '*.[hcS]' -type f -print | sort \
1232                 | xargs $(PERL) -w scripts/checkversion.pl
1233
1234 namespacecheck:
1235         $(PERL) $(srctree)/scripts/namespace.pl
1236
1237 endif #ifeq ($(config-targets),1)
1238 endif #ifeq ($(mixed-targets),1)
1239
1240 PHONY += checkstack
1241 checkstack:
1242         $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
1243         $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1244
1245 kernelrelease:
1246         $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1247         $(error kernelrelease not valid - run 'make *config' to update it))
1248 kernelversion:
1249         @echo $(KERNELVERSION)
1250
1251 # Single targets
1252 # ---------------------------------------------------------------------------
1253 # Single targets are compatible with:
1254 # - build whith mixed source and output
1255 # - build with separate output dir 'make O=...'
1256 # - external modules
1257 #
1258 #  target-dir => where to store outputfile
1259 #  build-dir  => directory in kernel source tree to use
1260
1261 ifeq ($(KBUILD_EXTMOD),)
1262         build-dir  = $(patsubst %/,%,$(dir $@))
1263         target-dir = $(dir $@)
1264 else
1265         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1266         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1267         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1268 endif
1269
1270 %.s: %.c prepare scripts FORCE
1271         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1272 %.i: %.c prepare scripts FORCE
1273         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1274 %.o: %.c prepare scripts FORCE
1275         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1276 %.lst: %.c prepare scripts FORCE
1277         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1278 %.s: %.S prepare scripts FORCE
1279         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1280 %.o: %.S prepare scripts FORCE
1281         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1282
1283 # Modules
1284 %/: prepare scripts FORCE
1285         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1286         $(build)=$(build-dir)
1287 /: prepare scripts FORCE
1288         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1289         $(build)=$(build-dir)
1290
1291 %.ko: prepare scripts FORCE
1292         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1293         $(build)=$(build-dir) $(@:.ko=.o)
1294         $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1295
1296 # FIXME Should go into a make.lib or something
1297 # ===========================================================================
1298
1299 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1300       cmd_rmdirs = rm -rf $(rm-dirs)
1301
1302 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1303       cmd_rmfiles = rm -f $(rm-files)
1304
1305 # read all saved command lines
1306
1307 targets := $(wildcard $(sort $(targets)))
1308 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1309
1310 ifneq ($(cmd_files),)
1311   $(cmd_files): ;       # Do not try to update included dependency files
1312   include $(cmd_files)
1313 endif
1314
1315 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1316 # Usage:
1317 # $(Q)$(MAKE) $(clean)=dir
1318 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1319
1320 endif   # skip-makefile
1321
1322 PHONY += FORCE
1323 FORCE:
1324
1325 -include $(srctree)/Makefile.custom
1326
1327 # Declare the contents of the .PHONY variable as phony.  We keep that
1328 # information in a variable se we can use it in if_changed and friends.
1329 .PHONY: $(PHONY)