VERSION = 2
  PATCHLEVEL = 6

  SUBLEVEL = 20

  EXTRAVERSION =-rc4

  NAME = Homicidal Dwarf Hamster

  
  # *DOCUMENTATION*
  # To see a list of typical targets execute "make help"
  # More info can be located in ./README
  # Comments in this file are targeted only to the developer, do not
  # expect to learn how to build the kernel reading this file.

  # Do not:
  # o  use make's built-in rules and variables
  #    (this increases performance and avoid hard-to-debug behavour);
  # o  print "Entering directory ...";
  MAKEFLAGS += -rR --no-print-directory

  
  # We are using a recursive build, so we need to do a little thinking
  # to get the ordering right.
  #
  # Most importantly: sub-Makefiles should only ever modify files in
  # their own directory. If in some directory we have a dependency on
  # a file in another dir (which doesn't happen often, but it's often
  # unavoidable when linking the built-in.o targets which finally
  # turn into vmlinux), we will call a sub make in that other dir, and
  # after that we are sure that everything which is in that other dir
  # is now up to date.
  #
  # The only cases where we need to modify files which have global
  # effects are thus separated out and done before the recursive
  # descending is started. They are now explicitly listed as the
  # prepare rule.
  
  # To put more focus on warnings, be less verbose as default
  # Use 'make V=1' to see the full commands
  
  ifdef V
    ifeq ("$(origin V)", "command line")
      KBUILD_VERBOSE = $(V)
    endif
  endif
  ifndef KBUILD_VERBOSE
    KBUILD_VERBOSE = 0
  endif

  # Call a source code checker (by default, "sparse") as part of the
  # C compilation.
  #
  # Use 'make C=1' to enable checking of only re-compiled files.
  # Use 'make C=2' to enable checking of *all* source files, regardless
  # of whether they are re-compiled or not.
  #
  # See the file "Documentation/sparse.txt" for more details, including
  # where to get the "sparse" utility.

  
  ifdef C
    ifeq ("$(origin C)", "command line")
      KBUILD_CHECKSRC = $(C)
    endif
  endif
  ifndef KBUILD_CHECKSRC
    KBUILD_CHECKSRC = 0
  endif
  
  # Use make M=dir to specify directory of external module to build
  # Old syntax make ... SUBDIRS=$PWD is still supported
  # Setting the environment variable KBUILD_EXTMOD take precedence
  ifdef SUBDIRS
    KBUILD_EXTMOD ?= $(SUBDIRS)
  endif
  ifdef M
    ifeq ("$(origin M)", "command line")
      KBUILD_EXTMOD := $(M)
    endif
  endif
  
  
  # kbuild supports saving output files in a separate directory.
  # To locate output files in a separate directory two syntaxes are supported.
  # In both cases the working directory must be the root of the kernel src.
  # 1) O=
  # Use "make O=dir/to/store/output/files/"

  #

  # 2) Set KBUILD_OUTPUT
  # Set the environment variable KBUILD_OUTPUT to point to the directory
  # where the output files shall be placed.
  # export KBUILD_OUTPUT=dir/to/store/output/files/
  # make
  #
  # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  # variable.
  
  
  # KBUILD_SRC is set on invocation of make in OBJ directory
  # KBUILD_SRC is not intended to be used by the regular user (for now)
  ifeq ($(KBUILD_SRC),)
  
  # OK, Make called in directory where kernel src resides
  # Do we want to locate output files in a separate directory?
  ifdef O
    ifeq ("$(origin O)", "command line")
      KBUILD_OUTPUT := $(O)
    endif
  endif
  
  # That's our default target when none is given on the command line

  PHONY := _all

  _all:
  
  ifneq ($(KBUILD_OUTPUT),)
  # Invoke a second make in the output directory, passing relevant variables
  # check that the output directory actually exists
  saved-output := $(KBUILD_OUTPUT)
  KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  $(if $(KBUILD_OUTPUT),, \
       $(error output directory "$(saved-output)" does not exist))

  PHONY += $(MAKECMDGOALS)

  $(filter-out _all,$(MAKECMDGOALS)) _all:

  	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  	KBUILD_SRC=$(CURDIR) \

  	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@

  
  # Leave processing to above invocation of make
  skip-makefile := 1
  endif # ifneq ($(KBUILD_OUTPUT),)
  endif # ifeq ($(KBUILD_SRC),)
  
  # We process the rest of the Makefile if this is the final invocation of make
  ifeq ($(skip-makefile),)
  
  # If building an external module we do not care about the all: rule
  # but instead _all depend on modules

  PHONY += all

  ifeq ($(KBUILD_EXTMOD),)
  _all: all
  else
  _all: modules
  endif
  
  srctree		:= $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  TOPDIR		:= $(srctree)
  # FIXME - TOPDIR is obsolete, use srctree/objtree
  objtree		:= $(CURDIR)
  src		:= $(srctree)
  obj		:= $(objtree)

  VPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))

  
  export srctree objtree VPATH TOPDIR

  
  # SUBARCH tells the usermode build what the underlying arch is.  That is set
  # first, and if a usermode build is happening, the "ARCH=um" on the command
  # line overrides the setting of ARCH below.  If a native build is happening,
  # then ARCH is assigned, getting whatever value it gets normally, and 
  # SUBARCH is subsequently ignored.
  
  SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  				  -e s/arm.*/arm/ -e s/sa110/arm/ \

  				  -e s/s390x/s390/ -e s/parisc64/parisc/ \

  				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )

  
  # Cross compiling and selecting different set of gcc/bin-utils
  # ---------------------------------------------------------------------------
  #
  # When performing cross compilation for other architectures ARCH shall be set
  # to the target architecture. (See arch/* for the possibilities).
  # ARCH can be set during invocation of make:
  # make ARCH=ia64
  # Another way is to have ARCH set in the environment.
  # The default ARCH is the host where make is executed.
  
  # CROSS_COMPILE specify the prefix used for all executables used
  # during compilation. Only gcc and related bin-utils executables
  # are prefixed with $(CROSS_COMPILE).
  # CROSS_COMPILE can be set on the command line
  # make CROSS_COMPILE=ia64-linux-
  # Alternatively CROSS_COMPILE can be set in the environment.
  # Default value for CROSS_COMPILE is not to prefix executables
  # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  
  ARCH		?= $(SUBARCH)
  CROSS_COMPILE	?=
  
  # Architecture as present in compile.h
  UTS_MACHINE := $(ARCH)

  KCONFIG_CONFIG	?= .config

  # SHELL used by kbuild
  CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  	  else if [ -x /bin/bash ]; then echo /bin/bash; \
  	  else echo sh; fi ; fi)

  HOSTCC       = gcc
  HOSTCXX      = g++
  HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  HOSTCXXFLAGS = -O2

  # Decide whether to build built-in, modular, or both.
  # Normally, just do built-in.

  
  KBUILD_MODULES :=
  KBUILD_BUILTIN := 1
  
  #	If we have only "make modules", don't compile built-in objects.
  #	When we're building modules with modversions, we need to consider
  #	the built-in objects during the descend as well, in order to

  #	make sure the checksums are up to date before we record them.

  
  ifeq ($(MAKECMDGOALS),modules)
    KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  endif
  
  #	If we have "make <whatever> modules", compile modules
  #	in addition to whatever we do anyway.
  #	Just "make" or "make all" shall build modules as well
  
  ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
    KBUILD_MODULES := 1
  endif
  
  ifeq ($(MAKECMDGOALS),)
    KBUILD_MODULES := 1
  endif

  export KBUILD_MODULES KBUILD_BUILTIN

  export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  
  # Beautify output
  # ---------------------------------------------------------------------------
  #
  # Normally, we echo the whole command before executing it. By making
  # that echo $($(quiet)$(cmd)), we now have the possibility to set
  # $(quiet) to choose other forms of output instead, e.g.
  #
  #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
  #
  # If $(quiet) is empty, the whole command will be printed.
  # If it is set to "quiet_", only the short version will be printed. 

  # If it is set to "silent_", nothing will be printed at all, since

  # the variable $(silent_cmd_cc_o_c) doesn't exist.
  #

  # A simple variant is to prefix commands with $(Q) - that's useful

  # for commands that shall be hidden in non-verbose mode.
  #
  #	$(Q)ln $@ :<
  #
  # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  
  ifeq ($(KBUILD_VERBOSE),1)
    quiet =
    Q =
  else
    quiet=quiet_
    Q = @
  endif
  
  # If the user is running make -s (silent mode), suppress echoing of
  # commands
  
  ifneq ($(findstring s,$(MAKEFLAGS)),)
    quiet=silent_
  endif
  
  export quiet Q KBUILD_VERBOSE

  
  # Look for make include files relative to root of kernel src
  MAKEFLAGS += --include-dir=$(srctree)

  # We need some generic definitions.
  include $(srctree)/scripts/Kbuild.include

  
  # Make variables (CC, etc...)
  
  AS		= $(CROSS_COMPILE)as
  LD		= $(CROSS_COMPILE)ld
  CC		= $(CROSS_COMPILE)gcc
  CPP		= $(CC) -E
  AR		= $(CROSS_COMPILE)ar
  NM		= $(CROSS_COMPILE)nm
  STRIP		= $(CROSS_COMPILE)strip
  OBJCOPY		= $(CROSS_COMPILE)objcopy
  OBJDUMP		= $(CROSS_COMPILE)objdump
  AWK		= awk
  GENKSYMS	= scripts/genksyms/genksyms
  DEPMOD		= /sbin/depmod
  KALLSYMS	= scripts/kallsyms
  PERL		= perl
  CHECK		= sparse

  CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)

  MODFLAGS	= -DMODULE
  CFLAGS_MODULE   = $(MODFLAGS)
  AFLAGS_MODULE   = $(MODFLAGS)
  LDFLAGS_MODULE  = -r
  CFLAGS_KERNEL	=
  AFLAGS_KERNEL	=
  
  
  # Use LINUXINCLUDE when you must reference the include/ directory.
  # Needed to be compatible with the O= option
  LINUXINCLUDE    := -Iinclude \

                     $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \

  		   -include include/linux/autoconf.h

  
  CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)

  CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
                     -fno-strict-aliasing -fno-common
  AFLAGS          := -D__ASSEMBLY__

  # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)

  KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)

  export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
  export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS

  
  export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS

  export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE

  export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  
  # When compiling out-of-tree modules, put MODVERDIR in the module
  # tree rather than in the kernel tree. The kernel tree might
  # even be read-only.
  export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions

  # Files to ignore in find ... statements

  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
  export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git

  
  # ===========================================================================
  # Rules shared between *config targets and build targets
  
  # Basic helpers built in scripts/

  PHONY += scripts_basic

  scripts_basic:
  	$(Q)$(MAKE) $(build)=scripts/basic

  # To avoid any implicit rule to kick in, define an empty command.
  scripts/basic/%: scripts_basic ;

  PHONY += outputmakefile

  # outputmakefile generates a Makefile in the output directory, if using a
  # separate output directory. This allows convenient use of make in the
  # output directory.

  outputmakefile:

  ifneq ($(KBUILD_SRC),)
  	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  endif

  
  # To make sure we do not include .config for any of the *config targets
  # catch them early, and hand them over to scripts/kconfig/Makefile
  # It is allowed to specify more targets when calling make, including
  # mixing *config targets and build targets.

  # For example 'make oldconfig all'.

  # Detect when mixed targets is specified, and make a second invocation
  # of make so .config is not included in this case either (for *config).

  PHONY += generated_headers
  
  generated_headers: include/linux/version.h include/linux/compile.h \
  		include/linux/utsrelease.h
  
  no-dot-config-targets := generated_headers clean mrproper distclean \

  			 cscope TAGS tags help %docs check% \

  			 headers_% kernelrelease kernelversion

  
  config-targets := 0
  mixed-targets  := 0
  dot-config     := 1
  
  ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  		dot-config := 0
  	endif
  endif
  
  ifeq ($(KBUILD_EXTMOD),)
          ifneq ($(filter config %config,$(MAKECMDGOALS)),)
                  config-targets := 1
                  ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
                          mixed-targets := 1
                  endif
          endif
  endif
  
  ifeq ($(mixed-targets),1)
  # ===========================================================================
  # We're called with mixed targets (*config and build targets).
  # Handle them one by one.
  
  %:: FORCE
  	$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  
  else
  ifeq ($(config-targets),1)
  # ===========================================================================
  # *config targets only - make sure prerequisites are updated, and descend
  # in scripts/kconfig to make the *config target
  
  # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  # KBUILD_DEFCONFIG may point out an alternative default configuration
  # used for 'make defconfig'
  include $(srctree)/arch/$(ARCH)/Makefile
  export KBUILD_DEFCONFIG

  config %config: scripts_basic outputmakefile FORCE

  	$(Q)mkdir -p include/linux include/config

  	$(Q)$(MAKE) $(build)=scripts/kconfig $@
  
  else
  # ===========================================================================
  # Build targets only - this includes vmlinux, arch specific targets, clean
  # targets and others. In general all targets except *config targets.
  
  ifeq ($(KBUILD_EXTMOD),)
  # Additional helpers built in scripts/
  # Carefully list dependencies so we do not try to build scripts twice

  # in parallel

  PHONY += scripts

  scripts: scripts_basic include/config/auto.conf

  	$(Q)$(MAKE) $(build)=$(@)

  # Objects we will link into vmlinux / subdirs we need to visit
  init-y		:= init/
  drivers-y	:= drivers/ sound/
  net-y		:= net/
  libs-y		:= lib/
  core-y		:= usr/
  endif # KBUILD_EXTMOD
  
  ifeq ($(dot-config),1)

  # Read in config
  -include include/config/auto.conf

  ifeq ($(KBUILD_EXTMOD),)

  # Read in dependencies to all Kconfig* files, make sure to run
  # oldconfig if changes are detected.

  -include include/config/auto.conf.cmd

  # To avoid any implicit rule to kick in, define an empty command

  $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;

  # If .config is newer than include/config/auto.conf, someone tinkered

  # with it and forgot to run make oldconfig.

  # if auto.conf.cmd is missing then we are probably in a cleaned tree so

  # we execute the config step to be sure to catch updated Kconfig files

  include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd

  	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  else

  # external modules needs include/linux/autoconf.h and include/config/auto.conf
  # but do not care if they are up-to-date. Use auto.conf to trigger the test
  PHONY += include/config/auto.conf
  
  include/config/auto.conf:
  	$(Q)test -e include/linux/autoconf.h -a -e $@ || (		\
  	echo;								\
  	echo "  ERROR: Kernel configuration is invalid.";		\
  	echo "         include/linux/autoconf.h or $@ are missing.";	\
  	echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
  	echo;								\
  	/bin/false)
  
  endif # KBUILD_EXTMOD

  else
  # Dummy target needed, because used as prerequisite

  include/config/auto.conf: ;

  endif # $(dot-config)

  
  # The all: target is the default when no target is given on the
  # command line.
  # This allow a user to issue only 'make' to build a kernel including modules

  # Defaults vmlinux but it is usually overridden in the arch makefile

  all: vmlinux
  
  ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  CFLAGS		+= -Os
  else
  CFLAGS		+= -O2
  endif

  include $(srctree)/arch/$(ARCH)/Makefile

  ifdef CONFIG_FRAME_POINTER

  CFLAGS		+= -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)

  else
  CFLAGS		+= -fomit-frame-pointer
  endif
  
  ifdef CONFIG_DEBUG_INFO
  CFLAGS		+= -g
  endif

  # Force gcc to behave correct even for buggy distributions
  CFLAGS          += $(call cc-option, -fno-stack-protector)

  # arch Makefile may override CC so keep this after arch Makefile is included

  NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)

  CHECKFLAGS     += $(NOSTDINC_FLAGS)

  # warn about C99 declaration after statement
  CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)

  # disable pointer signed / unsigned warnings in gcc 4.0

  CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  
  # Default kernel image to build when no specific target is given.

  # KBUILD_IMAGE may be overruled on the command line or

  # set in the environment
  # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  # this default value
  export KBUILD_IMAGE ?= vmlinux
  
  #
  # INSTALL_PATH specifies where to place the updated kernel and system map
  # images. Default is /boot, but you can set it to other values
  export	INSTALL_PATH ?= /boot
  
  #
  # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  # relocations required by build roots.  This is not defined in the

  # makefile but the argument can be passed to make if needed.

  #

  MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)

  export MODLIB

  #
  #  INSTALL_MOD_STRIP, if defined, will cause modules to be
  #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
  #  the default option --strip-debug will be used.  Otherwise,
  #  INSTALL_MOD_STRIP will used as the options to the strip command.
  
  ifdef INSTALL_MOD_STRIP
  ifeq ($(INSTALL_MOD_STRIP),1)

  mod_strip_cmd = $(STRIP) --strip-debug

  else
  mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  endif # INSTALL_MOD_STRIP=1
  else
  mod_strip_cmd = true
  endif # INSTALL_MOD_STRIP
  export mod_strip_cmd

  
  ifeq ($(KBUILD_EXTMOD),)

  core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/

  
  vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  		     $(net-y) $(net-m) $(libs-y) $(libs-m)))
  
  vmlinux-alldirs	:= $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  		     $(init-n) $(init-) \
  		     $(core-n) $(core-) $(drivers-n) $(drivers-) \
  		     $(net-n)  $(net-)  $(libs-n)    $(libs-))))
  
  init-y		:= $(patsubst %/, %/built-in.o, $(init-y))
  core-y		:= $(patsubst %/, %/built-in.o, $(core-y))
  drivers-y	:= $(patsubst %/, %/built-in.o, $(drivers-y))
  net-y		:= $(patsubst %/, %/built-in.o, $(net-y))
  libs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
  libs-y2		:= $(patsubst %/, %/built-in.o, $(libs-y))
  libs-y		:= $(libs-y1) $(libs-y2)
  
  # Build vmlinux
  # ---------------------------------------------------------------------------

  # vmlinux is built from the objects selected by $(vmlinux-init) and

  # $(vmlinux-main). Most are built-in.o files from top-level directories
  # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
  # Ordering when linking is important, and $(vmlinux-init) must be first.
  #
  # vmlinux
  #   ^
  #   |
  #   +-< $(vmlinux-init)
  #   |   +--< init/version.o + more
  #   |
  #   +--< $(vmlinux-main)
  #   |    +--< driver/built-in.o mm/built-in.o + more
  #   |
  #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  #
  # vmlinux version (uname -v) cannot be updated during normal
  # descending-into-subdirs phase since we do not yet know if we need to
  # update vmlinux.
  # Therefore this step is delayed until just before final link of vmlinux -
  # except in the kallsyms case where it is done just before adding the
  # symbols to the kernel.
  #
  # System.map is generated to document addresses of all kernel symbols
  
  vmlinux-init := $(head-y) $(init-y)
  vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
  vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds
  
  # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  # May be overridden by arch/$(ARCH)/Makefile
  quiet_cmd_vmlinux__ ?= LD      $@
        cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
        -T $(vmlinux-lds) $(vmlinux-init)                          \
        --start-group $(vmlinux-main) --end-group                  \
        $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
  
  # Generate new vmlinux version
  quiet_cmd_vmlinux_version = GEN     .version
        cmd_vmlinux_version = set -e;                     \

  	if [ ! -r .version ]; then			\
  	  rm -f .version;				\
  	  echo 1 >.version;				\
  	else						\
  	  mv .version .old_version;			\
  	  expr 0$$(cat .old_version) + 1 >.version;	\
  	fi;						\

  	$(MAKE) $(build)=init
  
  # Generate System.map

  quiet_cmd_sysmap = SYSMAP

        cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  
  # Link of vmlinux
  # If CONFIG_KALLSYMS is set .version is already updated
  # Generate System.map and verify that the content is consistent

  # Use + in front of the vmlinux_version rule to silent warning with make -j2
  # First command is ':' to allow us to use + in front of the rule

  define rule_vmlinux__

  	:

  	$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  
  	$(call cmd,vmlinux__)
  	$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd

  	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
  	  echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
  	$(cmd_sysmap) $@ System.map;                                         \
  	if [ $$? -ne 0 ]; then                                               \
  		rm -f $@;                                                    \
  		/bin/false;                                                  \

  	fi;
  	$(verify_kallsyms)
  endef
  
  
  ifdef CONFIG_KALLSYMS
  # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  # It's a three stage process:
  # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  #   empty
  #   Running kallsyms on that gives us .tmp_kallsyms1.o with
  #   the right size - vmlinux version (uname -v) is updated during this step
  # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  #   but due to the added section, some addresses have shifted.
  #   From here, we generate a correct .tmp_kallsyms2.o
  # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  # o Verify that the System.map from vmlinux matches the map from
  #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
  #   temporary bypass to allow the kernel to be built while the
  #   maintainers work out what went wrong with kallsyms.
  
  ifdef CONFIG_KALLSYMS_EXTRA_PASS
  last_kallsyms := 3
  else
  last_kallsyms := 2
  endif
  
  kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  
  define verify_kallsyms

  	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
  	  echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \

  	  $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map

  	$(Q)cmp -s System.map .tmp_System.map ||                             \
  		(echo Inconsistent kallsyms data;                            \
  		 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \

  		 rm .tmp_kallsyms* ; /bin/false )
  endef
  
  # Update vmlinux version before link
  # Use + in front of this rule to silent warning about make -j1

  # First command is ':' to allow us to use + in front of this rule

  cmd_ksym_ld = $(cmd_vmlinux__)
  define rule_ksym_ld

  	: 

  	+$(call cmd,vmlinux_version)
  	$(call cmd,vmlinux__)
  	$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  endef
  
  # Generate .S file with all kernel symbols
  quiet_cmd_kallsyms = KSYM    $@
        cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
                       $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  
  .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  	$(call if_changed_dep,as_o_S)
  
  .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  	$(call cmd,kallsyms)
  
  # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  	$(call if_changed_rule,ksym_ld)
  
  .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  	$(call if_changed,vmlinux__)
  
  .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  	$(call if_changed,vmlinux__)
  
  # Needs to visit scripts/ before $(KALLSYMS) can be used.
  $(KALLSYMS): scripts ;

  # Generate some data for debugging strange kallsyms problems
  debug_kallsyms: .tmp_map$(last_kallsyms)
  
  .tmp_map%: .tmp_vmlinux% FORCE
  	($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  
  .tmp_map3: .tmp_map2
  
  .tmp_map2: .tmp_map1

  endif # ifdef CONFIG_KALLSYMS

  # compile.h changes depending on hostname, generation number, etc,
  # so we regenerate it always.
  # mkcompile_h will make sure to only update the
  # actual file if its content has changed.
  
  include/linux/compile.h: FORCE
  	@echo '  CHK     $@'
  	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \
  	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(CFLAGS)"

  # vmlinux image - including updated kernel symbols
  vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE

  ifdef CONFIG_HEADERS_CHECK

  	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check

  endif

  	$(call if_changed_rule,vmlinux__)

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@

  	$(Q)rm -f .old_version

  
  # The actual objects are generated when descending, 
  # make sure no implicit rule kicks in
  $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  
  # Handle descending into subdirectories listed in $(vmlinux-dirs)
  # Preset locale variables to speed up the build process. Limit locale
  # tweaks to this spot to avoid wrong language settings when running
  # make menuconfig etc.
  # Error messages still appears in the original language

  PHONY += $(vmlinux-dirs)

  $(vmlinux-dirs): prepare scripts

  	$(Q)$(MAKE) $(build)=$@

  # Build the kernel release string

  #

  # The KERNELRELEASE value built here is stored in the file
  # include/config/kernel.release, and is used when executing several
  # make targets, such as "make install" or "make modules_install."
  #
  # The eventual kernel release string consists of the following fields,
  # shown in a hierarchical format to show how smaller parts are concatenated
  # to form the larger and final value, with values coming from places like
  # the Makefile, kernel config options, make command line options and/or
  # SCM tag information.
  #
  #	$(KERNELVERSION)
  #	  $(VERSION)			eg, 2
  #	  $(PATCHLEVEL)			eg, 6
  #	  $(SUBLEVEL)			eg, 18
  #	  $(EXTRAVERSION)		eg, -rc6
  #	$(localver-full)
  #	  $(localver)
  #	    localversion*		(all localversion* files)
  #	    $(CONFIG_LOCALVERSION)	(from kernel config setting)
  #	  $(localver-auto)		(only if CONFIG_LOCALVERSION_AUTO is set)
  #	    ./scripts/setlocalversion	(SCM tag, if one exists)
  #	    $(LOCALVERSION)		(from make command line if provided)
  #
  #  Note how the final $(localver-auto) string is included *only* if the
  # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
  # moment, only git is supported but other SCMs can edit the script
  # scripts/setlocalversion and add the appropriate checks as needed.

  
  nullstring :=
  space      := $(nullstring) # end of line
  
  ___localver = $(objtree)/localversion* $(srctree)/localversion*
  __localver  = $(sort $(wildcard $(___localver)))
  # skip backup files (containing '~')
  _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
  
  localver = $(subst $(space),, \
  	   $(shell cat /dev/null $(_localver)) \
  	   $(patsubst "%",%,$(CONFIG_LOCALVERSION)))

  # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  # and if the SCM is know a tag from the SCM is appended.

  # The appended tag is determined by the SCM used.

  #
  # Currently, only git is supported.
  # Other SCMs can edit scripts/setlocalversion and add the appropriate
  # checks as needed.
  ifdef CONFIG_LOCALVERSION_AUTO
  	_localver-auto = $(shell $(CONFIG_SHELL) \
  	                  $(srctree)/scripts/setlocalversion $(srctree))
  	localver-auto  = $(LOCALVERSION)$(_localver-auto)
  endif
  
  localver-full = $(localver)$(localver-auto)

  # Store (new) KERNELRELASE string in include/config/kernel.release

  kernelrelease = $(KERNELVERSION)$(localver-full)

  include/config/kernel.release: include/config/auto.conf FORCE

  	$(Q)rm -f $@
  	$(Q)echo $(kernelrelease) > $@

  # Things we need to do before we recursively start building the kernel

  # or the modules are listed in "prepare".
  # A multi level approach is used. prepareN is processed before prepareN-1.
  # archprepare is used in arch Makefiles and when processed asm symlink,
  # version.h and scripts_basic is processed / created.

  # Listed in dependency order

  PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3

  
  # prepare-all is deprecated, use prepare as valid replacement

  PHONY += prepare-all

  # prepare3 is used to check if we are building in a separate output directory,

  # and if so do:
  # 1) Check that make has not been executed in the kernel src $(srctree)
  # 2) Create the include2 directory, used for the second asm symlink

  prepare3: include/config/kernel.release

  ifneq ($(KBUILD_SRC),)
  	@echo '  Using $(srctree) as source for kernel'

  	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \

  		echo "  $(srctree) is not clean, please run 'make mrproper'";\
  		echo "  in the '$(srctree)' directory.";\
  		/bin/false; \
  	fi;
  	$(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
  	$(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
  endif

  # prepare2 creates a makefile if using a separate output directory
  prepare2: prepare3 outputmakefile

  prepare1: prepare2 generated_headers include/asm include/config/auto.conf

  ifneq ($(KBUILD_MODULES),)

  	$(Q)mkdir -p $(MODVERDIR)

  	$(Q)rm -f $(MODVERDIR)/*

  endif

  archprepare: prepare1 scripts_basic
  
  prepare0: archprepare FORCE

  	$(Q)$(MAKE) $(build)=.

  # All the preparing..

  prepare prepare-all: prepare0

  # Leave this as default for preprocessing vmlinux.lds.S, which is now
  # done in arch/$(ARCH)/kernel/Makefile

  
  export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)

  # FIXME: The asm symlink changes when $(ARCH) changes. That's
  # hard to detect, but I suppose "make mrproper" is a good idea
  # before switching between archs anyway.

  
  include/asm:
  	@echo '  SYMLINK $@ -> include/asm-$(ARCH)'
  	$(Q)if [ ! -d include ]; then mkdir -p include; fi;
  	@ln -fsn asm-$(ARCH) $@

  # Generate some files
  # ---------------------------------------------------------------------------
  
  # KERNELRELEASE can change from a few different places, meaning version.h
  # needs to be updated, so this check is forced on all builds
  
  uts_len := 64

  define filechk_utsrelease.h
  	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
  	  exit 1;                                                         \
  	fi;                                                               \
  	(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  endef

  
  define filechk_version.h

  	(echo \#define LINUX_VERSION_CODE $(shell                             \
  	expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
  	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)

  endef

  include/linux/version.h: $(srctree)/Makefile FORCE

  	$(call filechk,version.h)

  include/linux/utsrelease.h: include/config/kernel.release FORCE
  	$(call filechk,utsrelease.h)

  # ---------------------------------------------------------------------------

  PHONY += depend dep

  depend dep:
  	@echo '*** Warning: make $@ is unnecessary now.'
  
  # ---------------------------------------------------------------------------

  # Kernel headers

  INSTALL_HDR_PATH=$(objtree)/usr

  export INSTALL_HDR_PATH

  HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
  
  PHONY += headers_install_all

  headers_install_all: generated_headers scripts_basic FORCE

  	$(Q)$(MAKE) $(build)=scripts scripts/unifdef

  	$(Q)for arch in $(HDRARCHES); do \

  	 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\

  	 done

  PHONY += headers_install

  headers_install: generated_headers scripts_basic FORCE

  	@if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \

  	  echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
  	  exit 1 ; fi

  	$(Q)$(MAKE) $(build)=scripts scripts/unifdef

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include

  PHONY += headers_check
  headers_check: headers_install

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1

  # ---------------------------------------------------------------------------

  # Modules
  
  ifdef CONFIG_MODULES

  # By default, build modules as well

  
  all: modules
  
  #	Build modules

  PHONY += modules

  modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  	@echo '  Building modules, stage 2.';

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost

  
  
  # Target to prepare building external modules

  PHONY += modules_prepare

  modules_prepare: prepare scripts

  
  # Target to install modules

  PHONY += modules_install

  modules_install: _modinst_ _modinst_post

  PHONY += _modinst_

  _modinst_:

  	@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \

  		echo "Warning: you may need to install module-init-tools"; \
  		echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  		sleep 1; \
  	fi
  	@rm -rf $(MODLIB)/kernel
  	@rm -f $(MODLIB)/source
  	@mkdir -p $(MODLIB)/kernel
  	@ln -s $(srctree) $(MODLIB)/source
  	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
  		rm -f $(MODLIB)/build ; \
  		ln -s $(objtree) $(MODLIB)/build ; \
  	fi

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst

  
  # If System.map exists, run depmod.  This deliberately does not have a
  # dependency on System.map since that would run the dependency tree on
  # vmlinux.  This depmod is only for convenience to give the initial
  # boot a modules.dep even before / is mounted read-write.  However the
  # boot script depmod is the master version.
  ifeq "$(strip $(INSTALL_MOD_PATH))" ""
  depmod_opts	:=
  else
  depmod_opts	:= -b $(INSTALL_MOD_PATH) -r
  endif

  PHONY += _modinst_post

  _modinst_post: _modinst_
  	if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
  
  else # CONFIG_MODULES
  
  # Modules not configured
  # ---------------------------------------------------------------------------
  
  modules modules_install: FORCE
  	@echo
  	@echo "The present kernel configuration has modules disabled."
  	@echo "Type 'make config' and enable loadable module support."
  	@echo "Then build a kernel with module support enabled."
  	@echo
  	@exit 1
  
  endif # CONFIG_MODULES

  ###
  # Cleaning is done on three levels.
  # make clean     Delete most generated files
  #                Leave enough to build external modules
  # make mrproper  Delete the current configuration, and all generated files
  # make distclean Remove editor backup files, patch leftover files and the like
  
  # Directories & files removed with 'make clean'
  CLEAN_DIRS  += $(MODVERDIR)
  CLEAN_FILES +=	vmlinux System.map \
                  .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  
  # Directories & files removed with 'make mrproper'

  MRPROPER_DIRS  += include/config include2 usr/include

  MRPROPER_FILES += .config .config.old include/asm .version .old_version \

                    include/linux/autoconf.h include/linux/utsrelease.h include/linux/version.h \

  		  Module.symvers tags TAGS cscope*

  
  # clean - Delete most, but leave enough to build external modules
  #
  clean: rm-dirs  := $(CLEAN_DIRS)
  clean: rm-files := $(CLEAN_FILES)

  clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))

  PHONY += $(clean-dirs) clean archclean

  $(clean-dirs):
  	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  
  clean: archclean $(clean-dirs)
  	$(call cmd,rmdirs)
  	$(call cmd,rmfiles)
  	@find . $(RCS_FIND_IGNORE) \

  		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \

  		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  		-o -name '*.symtypes' \) \

  		-type f -print | xargs rm -f
  
  # mrproper - Delete all generated files, including .config
  #
  mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
  mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)

  PHONY += $(mrproper-dirs) mrproper archmrproper

  $(mrproper-dirs):
  	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  
  mrproper: clean archmrproper $(mrproper-dirs)
  	$(call cmd,rmdirs)
  	$(call cmd,rmfiles)
  
  # distclean
  #

  PHONY += distclean

  
  distclean: mrproper
  	@find $(srctree) $(RCS_FIND_IGNORE) \

  		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \

  		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \

  		-o -name '.*.rej' -o -size 0 \

  		-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  		-type f -print | xargs rm -f
  
  
  # Packaging of the kernel to various formats
  # ---------------------------------------------------------------------------
  # rpm target kept for backward compatibility
  package-dir	:= $(srctree)/scripts/package

  %pkg: include/config/kernel.release FORCE

  	$(Q)$(MAKE) $(build)=$(package-dir) $@

  rpm: include/config/kernel.release FORCE

  	$(Q)$(MAKE) $(build)=$(package-dir) $@

  
  
  # Brief documentation of the typical targets used
  # ---------------------------------------------------------------------------
  
  boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
  boards := $(notdir $(boards))
  
  help:
  	@echo  'Cleaning targets:'

  	@echo  '  clean		  - Remove most generated files but keep the config and'

  	@echo  '                    enough build support to build external modules'

  	@echo  '  mrproper	  - Remove all generated files + config + various backup files'

  	@echo  '  distclean	  - mrproper + remove editor backup and patch files'

  	@echo  ''
  	@echo  'Configuration targets:'
  	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  	@echo  ''
  	@echo  'Other generic targets:'
  	@echo  '  all		  - Build all targets marked with [*]'
  	@echo  '* vmlinux	  - Build the bare kernel'
  	@echo  '* modules	  - Build all modules'

  	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'

  	@echo  '  dir/            - Build all files in dir and below'
  	@echo  '  dir/file.[ois]  - Build specified target only'

  	@echo  '  dir/file.ko     - Build module including final link'

  	@echo  '  rpm		  - Build a kernel as an RPM package'
  	@echo  '  tags/TAGS	  - Generate tags file for editors'
  	@echo  '  cscope	  - Generate cscope index'

  	@echo  '  kernelrelease	  - Output the release version string'

  	@echo  '  kernelversion	  - Output the version stored in Makefile'

  	@if [ -r include/asm-$(ARCH)/Kbuild ]; then \
  	 echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  	 fi

  	@echo  '                    (default: $(INSTALL_HDR_PATH))'

  	@echo  ''
  	@echo  'Static analysers'

  	@echo  '  checkstack      - Generate a list of stack hogs'
  	@echo  '  namespacecheck  - Name space analysis on compiled kernel'

  	@if [ -r include/asm-$(ARCH)/Kbuild ]; then \
  	 echo  '  headers_check   - Sanity check on exported headers'; \
  	 fi

  	@echo  ''
  	@echo  'Kernel packaging:'

  	@$(MAKE) $(build)=$(package-dir) help

  	@echo  ''
  	@echo  'Documentation targets:'
  	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  	@echo  ''
  	@echo  'Architecture specific targets ($(ARCH)):'
  	@$(if $(archhelp),$(archhelp),\
  		echo '  No architecture specific help defined for $(ARCH)')
  	@echo  ''
  	@$(if $(boards), \
  		$(foreach b, $(boards), \
  		printf "  %-24s - Build for %s\
  " $(b) $(subst _defconfig,,$(b));) \
  		echo '')
  
  	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'

  	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'

  	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'

  	@echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
  	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'

  	@echo  ''
  	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
  	@echo  'For further info see the ./README file'
  
  
  # Documentation targets
  # ---------------------------------------------------------------------------
  %docs: scripts_basic FORCE
  	$(Q)$(MAKE) $(build)=Documentation/DocBook $@
  
  else # KBUILD_EXTMOD
  
  ###
  # External module support.
  # When building external modules the kernel used as basis is considered
  # read-only, and no consistency checks are made and the make
  # system is not used on the basis kernel. If updates are required
  # in the basis kernel ordinary make commands (without M=...) must
  # be used.
  #
  # The following are the only valid targets when building external
  # modules.
  # make M=dir clean     Delete all automatically generated files
  # make M=dir modules   Make all modules in specified dir
  # make M=dir	       Same as 'make M=dir modules'
  # make M=dir modules_install

  #                      Install the modules built in the module directory

  #                      Assumes install directory is already created
  
  # We are always building modules
  KBUILD_MODULES := 1

  PHONY += crmodverdir

  crmodverdir:
  	$(Q)mkdir -p $(MODVERDIR)

  	$(Q)rm -f $(MODVERDIR)/*

  PHONY += $(objtree)/Module.symvers

  $(objtree)/Module.symvers:
  	@test -e $(objtree)/Module.symvers || ( \
  	echo; \
  	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  	echo "           is missing; modules will have no dependencies and modversions."; \
  	echo )
  
  module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))

  PHONY += $(module-dirs) modules

  $(module-dirs): crmodverdir $(objtree)/Module.symvers
  	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  
  modules: $(module-dirs)
  	@echo '  Building modules, stage 2.';

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost

  PHONY += modules_install

  modules_install: _emodinst_ _emodinst_post

  install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  PHONY += _emodinst_

  _emodinst_:

  	$(Q)mkdir -p $(MODLIB)/$(install-dir)

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst

  # Run depmod only is we have System.map and depmod is executable
  quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
        cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
                        $(DEPMOD) -ae -F System.map             \
                        $(if $(strip $(INSTALL_MOD_PATH)),      \
  		      -b $(INSTALL_MOD_PATH) -r)              \
  		      $(KERNELRELEASE);                       \
                     fi

  PHONY += _emodinst_post

  _emodinst_post: _emodinst_
  	$(call cmd,depmod)

  clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))

  PHONY += $(clean-dirs) clean

  $(clean-dirs):
  	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  
  clean:	rm-dirs := $(MODVERDIR)
  clean: $(clean-dirs)
  	$(call cmd,rmdirs)
  	@find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \

  		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \

  		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  		-type f -print | xargs rm -f
  
  help:
  	@echo  '  Building external modules.'
  	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
  	@echo  ''
  	@echo  '  modules         - default target, build the module(s)'
  	@echo  '  modules_install - install the module'
  	@echo  '  clean           - remove generated files in module directory only'
  	@echo  ''

  
  # Dummies...

  PHONY += prepare scripts

  prepare: ;
  scripts: ;

  endif # KBUILD_EXTMOD
  
  # Generate tags for editors
  # ---------------------------------------------------------------------------
  
  #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
  #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
  #Adding $(srctree) adds about 20M on i386 to the size of the output file!

  ifeq ($(src),$(obj))

  __srctree =
  else
  __srctree = $(srctree)/
  endif

  ifeq ($(ALLSOURCE_ARCHS),)
  ifeq ($(ARCH),um)
  ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
  else
  ALLINCLUDE_ARCHS := $(ARCH)
  endif
  else

  #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.

  ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
  endif

  ALLSOURCE_ARCHS := $(ARCH)

  define find-sources
          ( find $(__srctree) $(RCS_FIND_IGNORE) \

  	       \( -name include -o -name arch \) -prune -o \

  	       -name $1 -print; \

  	  for ARCH in $(ALLSOURCE_ARCHS) ; do \
  	       find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \

  	            -name $1 -print; \

  	  done ; \

  	  find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \

  	       -name $1 -print; \

  	  find $(__srctree)include $(RCS_FIND_IGNORE) \
  	       \( -name config -o -name 'asm-*' \) -prune \

  	       -o -name $1 -print; \

  	  for ARCH in $(ALLINCLUDE_ARCHS) ; do \

  	       find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \

  	            -name $1 -print; \

  	  done ; \

  	  find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \

  	       -name $1 -print )
  endef
  
  define all-sources
  	$(call find-sources,'*.[chS]')
  endef
  define all-kconfigs
  	$(call find-sources,'Kconfig*')
  endef
  define all-defconfigs
  	$(call find-sources,'defconfig')

  endef

  define xtags
  	if $1 --version 2>&1 | grep -iq exuberant; then \
  	    $(all-sources) | xargs $1 -a \
  		-I __initdata,__exitdata,__acquires,__releases \
  		-I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \

  		--extra=+f --c-kinds=+px \
  		--regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \

  	    $(all-kconfigs) | xargs $1 -a \
  		--langdef=kconfig \
  		--language-force=kconfig \
  		--regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \

  	    $(all-defconfigs) | xargs -r $1 -a \

  		--langdef=dotconfig \
  		--language-force=dotconfig \
  		--regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
  	elif $1 --version 2>&1 | grep -iq emacs; then \
  	    $(all-sources) | xargs $1 -a; \
  	    $(all-kconfigs) | xargs $1 -a \
  		--regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \

  	    $(all-defconfigs) | xargs -r $1 -a \

  		--regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
  	else \
  	    $(all-sources) | xargs $1 -a; \
  	fi
  endef

  quiet_cmd_cscope-file = FILELST cscope.files

        cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files

  
  quiet_cmd_cscope = MAKE    cscope.out

        cmd_cscope = cscope -b

  
  cscope: FORCE
  	$(call cmd,cscope-file)
  	$(call cmd,cscope)
  
  quiet_cmd_TAGS = MAKE   $@

  define cmd_TAGS
  	rm -f $@; \

  	$(call xtags,etags)

  endef
  
  TAGS: FORCE
  	$(call cmd,TAGS)

  quiet_cmd_tags = MAKE   $@
  define cmd_tags
  	rm -f $@; \

  	$(call xtags,ctags)

  endef

  tags: FORCE
  	$(call cmd,tags)
  
  
  # Scripts to check various things for consistency
  # ---------------------------------------------------------------------------

  includecheck:
  	find * $(RCS_FIND_IGNORE) \
  		-name '*.[hcS]' -type f -print | sort \
  		| xargs $(PERL) -w scripts/checkincludes.pl
  
  versioncheck:
  	find * $(RCS_FIND_IGNORE) \
  		-name '*.[hcS]' -type f -print | sort \
  		| xargs $(PERL) -w scripts/checkversion.pl

  namespacecheck:
  	$(PERL) $(srctree)/scripts/namespace.pl
  
  endif #ifeq ($(config-targets),1)
  endif #ifeq ($(mixed-targets),1)

  PHONY += checkstack kernelrelease kernelversion

  # UML needs a little special treatment here.  It wants to use the host
  # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
  # else wants $(ARCH), including people doing cross-builds, which means
  # that $(SUBARCH) doesn't work here.
  ifeq ($(ARCH), um)
  CHECKSTACK_ARCH := $(SUBARCH)
  else
  CHECKSTACK_ARCH := $(ARCH)
  endif

  checkstack:
  	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \

  	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)

  
  kernelrelease:

  	$(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  	$(error kernelrelease not valid - run 'make prepare' to update it))

  kernelversion:

  	@echo $(KERNELVERSION)

  # Single targets
  # ---------------------------------------------------------------------------

  # Single targets are compatible with:
  # - build whith mixed source and output
  # - build with separate output dir 'make O=...'
  # - external modules
  #
  #  target-dir => where to store outputfile
  #  build-dir  => directory in kernel source tree to use
  
  ifeq ($(KBUILD_EXTMOD),)

          build-dir  = $(patsubst %/,%,$(dir $@))

          target-dir = $(dir $@)
  else
          zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
          build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
          target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  endif

  %.s: %.c prepare scripts FORCE

  	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

  %.i: %.c prepare scripts FORCE

  	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

  %.o: %.c prepare scripts FORCE

  	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

  %.lst: %.c prepare scripts FORCE

  	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

  %.s: %.S prepare scripts FORCE

  	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

  %.o: %.S prepare scripts FORCE

  	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

  %.symtypes: %.c prepare scripts FORCE
  	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

  # Modules
  / %/: prepare scripts FORCE

  	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \

  	$(build)=$(build-dir)
  %.ko: prepare scripts FORCE

  	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \

  	$(build)=$(build-dir) $(@:.ko=.o)

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost

  # FIXME Should go into a make.lib or something 
  # ===========================================================================
  
  quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
        cmd_rmdirs = rm -rf $(rm-dirs)
  
  quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
        cmd_rmfiles = rm -f $(rm-files)
  
  
  a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
  	  $(NOSTDINC_FLAGS) $(CPPFLAGS) \

  	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)

  
  quiet_cmd_as_o_S = AS      $@
  cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
  
  # read all saved command lines
  
  targets := $(wildcard $(sort $(targets)))
  cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  
  ifneq ($(cmd_files),)
    $(cmd_files): ;	# Do not try to update included dependency files
    include $(cmd_files)
  endif

  # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  # Usage:
  # $(Q)$(MAKE) $(clean)=dir
  clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj

  endif	# skip-makefile

  PHONY += FORCE

  FORCE:

  # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
  Makefile: ;

  
  # Declare the contents of the .PHONY variable as phony.  We keep that
  # information in a variable se we can use it in if_changed and friends.
  .PHONY: $(PHONY)