VERSION = 3

  PATCHLEVEL = 18

  SUBLEVEL = 5

  EXTRAVERSION =

  NAME = Diseased Newt

  
  # *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 use make's built-in rules and variables
  # (this increases performance and avoids hard-to-debug behaviour);
  MAKEFLAGS += -rR

  # Avoid funny character set dependencies

  unexport LC_ALL

  LC_COLLATE=C
  LC_NUMERIC=C

  export LC_COLLATE LC_NUMERIC

  # Avoid interference with shell env settings
  unexport GREP_OPTIONS

  # 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.

  # 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.
  #

  # To put more focus on warnings, be less verbose as default
  # Use 'make V=1' to see the full commands

  ifeq ("$(origin V)", "command line")
    KBUILD_VERBOSE = $(V)

  endif
  ifndef KBUILD_VERBOSE
    KBUILD_VERBOSE = 0
  endif

  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 ($(filter 4.%,$(MAKE_VERSION)),)	# make-4
  ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
    quiet=silent_
  endif
  else					# make-3.8x
  ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
    quiet=silent_
  endif
  endif
  
  export quiet Q KBUILD_VERBOSE

  # 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?

  ifeq ("$(origin O)", "command line")
    KBUILD_OUTPUT := $(O)

  endif
  
  # That's our default target when none is given on the command line

  PHONY := _all

  _all:

  # Cancel implicit rules on top Makefile
  $(CURDIR)/Makefile Makefile: ;

  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 mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
  								&& /bin/pwd)

  $(if $(KBUILD_OUTPUT),, \

       $(error failed to create output directory "$(saved-output)"))

  PHONY += $(MAKECMDGOALS) sub-make

  $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make

  	@:

  
  sub-make: FORCE

  	$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \

  	-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))

  
  # 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),)

  # Do not print "Entering directory ...",
  # but we want to display it when entering to the output directory
  # so that IDEs/editors are able to understand relative filenames.
  MAKEFLAGS += --no-print-directory

  # 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.
  
  ifeq ("$(origin C)", "command line")
    KBUILD_CHECKSRC = $(C)
  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
  
  ifeq ("$(origin M)", "command line")
    KBUILD_EXTMOD := $(M)
  endif

  # 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

  ifeq ($(KBUILD_SRC),)
          # building in the source tree
          srctree := .
  else
          ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
                  # building in a subdirectory of the source tree
                  srctree := ..
          else
                  srctree := $(KBUILD_SRC)
          endif
  endif

  objtree		:= .

  src		:= $(srctree)
  obj		:= $(objtree)

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

  export srctree objtree VPATH

  
  # 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/x86/ -e s/x86_64/x86/ \
  				  -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/ \

  				  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )

  
  # 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.

  # A third alternative is to store a setting in .config so that plain
  # "make" in the configured kernel build directory always uses that.

  # Default value for CROSS_COMPILE is not to prefix executables
  # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile

  ARCH		?= $(SUBARCH)

  CROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)

  
  # Architecture as present in compile.h

  UTS_MACHINE 	:= $(ARCH)
  SRCARCH 	:= $(ARCH)

  # Additional ARCH settings for x86
  ifeq ($(ARCH),i386)
          SRCARCH := x86
  endif
  ifeq ($(ARCH),x86_64)
          SRCARCH := x86
  endif

  # Additional ARCH settings for sparc

  ifeq ($(ARCH),sparc32)
         SRCARCH := sparc
  endif

  ifeq ($(ARCH),sparc64)

         SRCARCH := sparc

  endif

  # Additional ARCH settings for sh
  ifeq ($(ARCH),sh64)
         SRCARCH := sh
  endif

  # Additional ARCH settings for tile

  ifeq ($(ARCH),tilepro)
         SRCARCH := tile
  endif

  ifeq ($(ARCH),tilegx)
         SRCARCH := tile
  endif

  # Where to locate arch specific headers
  hdr-arch  := $(SRCARCH)

  KCONFIG_CONFIG	?= .config

  export KCONFIG_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 -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89

  HOSTCXXFLAGS = -O2

  ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
  HOSTCFLAGS  += -Wno-unused-value -Wno-unused-parameter \
  		-Wno-missing-field-initializers -fno-delete-null-pointer-checks
  endif

  # 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

  ifneq ($(CC),)
  ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
  COMPILER := clang
  else
  COMPILER := gcc
  endif
  export COMPILER
  endif

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

  # We need some generic definitions (do not try to remake the file).
  $(srctree)/scripts/Kbuild.include: ;

  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

  INSTALLKERNEL  := installkernel

  DEPMOD		= /sbin/depmod

  PERL		= perl

  PYTHON		= python

  CHECK		= sparse

  CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  		  -Wbitwise -Wno-return-void $(CF)

  CFLAGS_MODULE   =
  AFLAGS_MODULE   =
  LDFLAGS_MODULE  =

  CFLAGS_KERNEL	=
  AFLAGS_KERNEL	=

  CFLAGS_GCOV	= -fprofile-arcs -ftest-coverage

  # Use USERINCLUDE when you must reference the UAPI directories only.
  USERINCLUDE    := \
  		-I$(srctree)/arch/$(hdr-arch)/include/uapi \
  		-Iarch/$(hdr-arch)/include/generated/uapi \
  		-I$(srctree)/include/uapi \
  		-Iinclude/generated/uapi \
                  -include $(srctree)/include/linux/kconfig.h

  # Use LINUXINCLUDE when you must reference the include/ directory.
  # Needed to be compatible with the O= option

  LINUXINCLUDE    := \
  		-I$(srctree)/arch/$(hdr-arch)/include \
  		-Iarch/$(hdr-arch)/include/generated \
  		$(if $(KBUILD_SRC), -I$(srctree)/include) \
  		-Iinclude \
  		$(USERINCLUDE)

  KBUILD_CPPFLAGS := -D__KERNEL__

  KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \

  		   -fno-strict-aliasing -fno-common \

  		   -Werror-implicit-function-declaration \

  		   -Wno-format-security \
  		   -std=gnu89

  KBUILD_AFLAGS_KERNEL :=
  KBUILD_CFLAGS_KERNEL :=

  KBUILD_AFLAGS   := -D__ASSEMBLY__

  KBUILD_AFLAGS_MODULE  := -DMODULE
  KBUILD_CFLAGS_MODULE  := -DMODULE
  KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds

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

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

  export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION

  export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC

  export CPP AR NM STRIP OBJCOPY OBJDUMP

  export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE

  export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS

  export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS

  export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV

  export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE

  export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE

  export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL

  export KBUILD_ARFLAGS

  
  # 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

  export 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

  	$(Q)rm -f .tmp_quiet_recordmcount

  # 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)ln -fsn $(srctree) source

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

  # Support for using generic headers in asm-generic
  PHONY += asm-generic
  asm-generic:
  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \

  	            src=asm obj=arch/$(SRCARCH)/include/generated/asm
  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
  	            src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm

  # 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).

  version_h := include/generated/uapi/linux/version.h

  no-dot-config-targets := clean mrproper distclean \

  			 cscope gtags TAGS tags help %docs check% coccicheck \

  			 $(version_h) headers_% archheaders archscripts \

  			 kernelversion %src-pkg

  
  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.

  PHONY += $(MAKECMDGOALS) __build_one_by_one
  
  $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
  	@:
  
  __build_one_by_one:
  	$(Q)set -e; \
  	for i in $(MAKECMDGOALS); do \
  		$(MAKE) -f $(srctree)/Makefile $$i; \
  	done

  
  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 $(srctree)/arch/$(SRCARCH)/Makefile

  export KBUILD_DEFCONFIG KBUILD_KCONFIG

  config: scripts_basic outputmakefile FORCE

  	$(Q)$(MAKE) $(build)=scripts/kconfig $@
  
  %config: scripts_basic outputmakefile FORCE

  	$(Q)$(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 include/config/tristate.conf \
  	 asm-generic

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

  # Objects we will link into vmlinux / subdirs we need to visit
  init-y		:= init/

  drivers-y	:= drivers/ sound/ firmware/

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

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

  # external modules needs include/generated/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/generated/autoconf.h -a -e $@ || (		\

  	echo >&2;							\
  	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
  	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
  	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
  	echo >&2 ;							\

  	/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 to vmlinux, but the arch makefile usually adds further targets

  all: vmlinux

  include $(srctree)/arch/$(SRCARCH)/Makefile
  
  KBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)

  ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE

  KBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)

  else

  KBUILD_CFLAGS	+= -O2

  endif

  # Tell gcc to never replace conditional load with a non-conditional one
  KBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)

  ifdef CONFIG_READABLE_ASM
  # Disable optimizations that make assembler listings hard to read.
  # reorder blocks reorders the control in the function
  # ipa clone creates specialized cloned functions
  # partial inlining inlines only parts of functions
  KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
                   $(call cc-option,-fno-ipa-cp-clone,) \
                   $(call cc-option,-fno-partial-inlining)
  endif

  ifneq ($(CONFIG_FRAME_WARN),0)

  KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  endif

  # Handle stack protector mode.

  #
  # Since kbuild can potentially perform two passes (first with the old
  # .config values and then with updated .config values), we cannot error out
  # if a desired compiler option is unsupported. If we were to error, kbuild
  # could never get to the second pass and actually notice that we changed
  # the option to something that was supported.
  #
  # Additionally, we don't want to fallback and/or silently change which compiler
  # flags will be used, since that leads to producing kernels with different
  # security feature characteristics depending on the compiler used. ("But I
  # selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
  #
  # The middle ground is to warn here so that the failed option is obvious, but
  # to let the build fail with bad compiler flags so that we can't produce a
  # kernel when there is a CONFIG and compiler mismatch.
  #

  ifdef CONFIG_CC_STACKPROTECTOR_REGULAR

    stackp-flag := -fstack-protector
    ifeq ($(call cc-option, $(stackp-flag)),)

      $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \

               -fstack-protector not supported by compiler)

    endif

  else
  ifdef CONFIG_CC_STACKPROTECTOR_STRONG

    stackp-flag := -fstack-protector-strong
    ifeq ($(call cc-option, $(stackp-flag)),)
      $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
  	      -fstack-protector-strong not supported by compiler)
    endif

  else
    # Force off for distro compilers that enable stack protector by default.
    stackp-flag := $(call cc-option, -fno-stack-protector)

  endif

  endif

  KBUILD_CFLAGS += $(stackp-flag)

  ifeq ($(COMPILER),clang)
  KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
  KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
  KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
  KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
  KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
  # Quiet clang warning: comparison of unsigned expression < 0 is always false
  KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
  # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
  # source of a reference will be _MergedGlobals and not on of the whitelisted names.
  # See modpost pattern 2
  KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)

  KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)

  else

  # This warning generated too much noise in a regular build.
  # Use make W=1 to enable this warning (see scripts/Makefile.build)

  KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)

  endif

  ifdef CONFIG_FRAME_POINTER

  KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls

  else

  # Some targets (ARM with Thumb2, for example), can't be built with frame
  # pointers.  For those, we don't have FUNCTION_TRACER automatically
  # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
  # incompatible with -fomit-frame-pointer with current GCC, so we don't use
  # -fomit-frame-pointer with FUNCTION_TRACER.
  ifndef CONFIG_FUNCTION_TRACER

  KBUILD_CFLAGS	+= -fomit-frame-pointer

  endif

  endif

  KBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)

  ifdef CONFIG_DEBUG_INFO

  ifdef CONFIG_DEBUG_INFO_SPLIT
  KBUILD_CFLAGS   += $(call cc-option, -gsplit-dwarf, -g)
  else

  KBUILD_CFLAGS	+= -g

  endif

  KBUILD_AFLAGS	+= -Wa,-gdwarf-2

  endif

  ifdef CONFIG_DEBUG_INFO_DWARF4
  KBUILD_CFLAGS	+= $(call cc-option, -gdwarf-4,)
  endif

  ifdef CONFIG_DEBUG_INFO_REDUCED

  KBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly) \
  		   $(call cc-option,-fno-var-tracking)

  endif

  ifdef CONFIG_FUNCTION_TRACER

  ifdef CONFIG_HAVE_FENTRY
  CC_USING_FENTRY	:= $(call cc-option, -mfentry -DCC_USING_FENTRY)
  endif
  KBUILD_CFLAGS	+= -pg $(CC_USING_FENTRY)
  KBUILD_AFLAGS	+= $(CC_USING_FENTRY)

  ifdef CONFIG_DYNAMIC_FTRACE

  	ifdef CONFIG_HAVE_C_RECORDMCOUNT

  		BUILD_C_RECORDMCOUNT := y
  		export BUILD_C_RECORDMCOUNT
  	endif
  endif

  endif

  # We trigger additional mismatches with less inlining
  ifdef CONFIG_DEBUG_SECTION_MISMATCH
  KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  endif

  # 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

  KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)

  # disable pointer signed / unsigned warnings in gcc 4.0

  KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)

  # disable invalid "can't wrap" optimizations for signed / pointers

  KBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)

  # conserve stack if available
  KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)

  # disallow errors like 'EXPORT_GPL(foo);' with missing header
  KBUILD_CFLAGS   += $(call cc-option,-Werror=implicit-int)
  
  # require functions to have arguments in prototypes, not empty 'int foo()'
  KBUILD_CFLAGS   += $(call cc-option,-Werror=strict-prototypes)

  # Prohibit date/time macros, which would make the build non-deterministic
  KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)

  # use the deterministic mode of AR if available
  KBUILD_ARFLAGS := $(call ar-option,D)

  # check for 'asm goto'
  ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
  	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
  endif

  include $(srctree)/scripts/Makefile.extrawarn

  # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments

  KBUILD_CPPFLAGS += $(KCPPFLAGS)
  KBUILD_AFLAGS += $(KAFLAGS)
  KBUILD_CFLAGS += $(KCFLAGS)

  # Use --build-id when available.
  LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\

  			      $(call cc-ldoption, -Wl$(comma)--build-id,))

  KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)

  LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)

  ifeq ($(CONFIG_STRIP_ASM_SYMS),y)

  LDFLAGS_vmlinux	+= $(call ld-option, -X,)

  endif

  # 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_DTBS_PATH specifies a prefix for relocations required by build roots.
  # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
  # an argument if needed. Otherwise it defaults to the kernel install path
  #
  export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
  
  #

  # 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 value will be 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

  # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
  # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
  # or CONFIG_MODULE_COMPRESS_XZ.
  
  mod_compress_cmd = true
  ifdef CONFIG_MODULE_COMPRESS
    ifdef CONFIG_MODULE_COMPRESS_GZIP
      mod_compress_cmd = gzip -n
    endif # CONFIG_MODULE_COMPRESS_GZIP
    ifdef CONFIG_MODULE_COMPRESS_XZ
      mod_compress_cmd = xz
    endif # CONFIG_MODULE_COMPRESS_XZ
  endif # CONFIG_MODULE_COMPRESS
  export mod_compress_cmd

  # Select initial ramdisk compression format, default is gzip(1).
  # This shall be used by the dracut(8) tool while creating an initramfs image.
  #

  INITRD_COMPRESS-y                  := gzip
  INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
  INITRD_COMPRESS-$(CONFIG_RD_LZMA)  := lzma
  INITRD_COMPRESS-$(CONFIG_RD_XZ)    := xz
  INITRD_COMPRESS-$(CONFIG_RD_LZO)   := lzo
  INITRD_COMPRESS-$(CONFIG_RD_LZ4)   := lz4

  # do not export INITRD_COMPRESS, since we didn't actually
  # choose a sane default compression above.
  # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)

  ifdef CONFIG_MODULE_SIG_ALL

  MODSECKEY = ./signing_key.priv
  MODPUBKEY = ./signing_key.x509
  export MODPUBKEY

  mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)

  else
  mod_sign_cmd = true
  endif
  export mod_sign_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-) $(core-) $(drivers-) $(net-) $(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)

  # Externally visible symbols (used by link-vmlinux.sh)

  export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
  export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds

  export LDFLAGS_vmlinux

  # used by scripts/pacmage/Makefile
  export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)

  vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)

  # Final link of vmlinux
        cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
  quiet_cmd_link-vmlinux = LINK    $@

  # Include targets which we want to
  # execute if the rest of the kernel build went well.
  vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE

  ifdef CONFIG_HEADERS_CHECK

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

  endif

  ifdef CONFIG_SAMPLES
  	$(Q)$(MAKE) $(build)=samples
  endif

  ifdef CONFIG_BUILD_DOCSRC
  	$(Q)$(MAKE) $(build)=Documentation
  endif

  	+$(call if_changed,link-vmlinux)

  # The actual objects are generated when descending,

  # make sure no implicit rule kicks in

  $(sort $(vmlinux-deps)): $(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) $(build)=$@

  define filechk_kernel.release
  	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
  endef

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

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

  	$(call filechk,kernel.release)

  # 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

  # 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)

  prepare3: include/config/kernel.release

  ifneq ($(KBUILD_SRC),)

  	@$(kecho) '  Using $(srctree) as source for kernel'

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

  		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
  		echo >&2 "  in the '$(srctree)' directory.";\

  		/bin/false; \
  	fi;

  endif

  # prepare2 creates a makefile if using a separate output directory

  prepare2: prepare3 outputmakefile asm-generic

  prepare1: prepare2 $(version_h) include/generated/utsrelease.h \

                     include/config/auto.conf

  	$(cmd_crmodverdir)

  archprepare: archheaders archscripts prepare1 scripts_basic

  
  prepare0: archprepare FORCE

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

  # All the preparing..

  prepare: prepare0

  # 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 $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \

  	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)

  endef

  $(version_h): $(srctree)/Makefile FORCE

  	$(call filechk,version.h)

  include/generated/utsrelease.h: include/config/kernel.release FORCE

  	$(call filechk,utsrelease.h)

  PHONY += headerdep
  headerdep:

  	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
  	$(srctree)/scripts/headerdep.pl -I$(srctree)/include

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

  PHONY += depend dep

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

  # Firmware install
  INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  export INSTALL_FW_PATH
  
  PHONY += firmware_install
  firmware_install: FORCE
  	@mkdir -p $(objtree)/firmware
  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  
  # ---------------------------------------------------------------------------

  # Kernel headers

  #Default location for installed headers
  export INSTALL_HDR_PATH = $(objtree)/usr

  hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj

  
  # If we do an all arch process set dst to asm-$(hdr-arch)
  hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)

  PHONY += archheaders
  archheaders:

  PHONY += archscripts
  archscripts:

  PHONY += __headers

  __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE

  	$(Q)$(MAKE) $(build)=scripts build_unifdef

  
  PHONY += headers_install_all

  headers_install_all:
  	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install

  PHONY += headers_install

  headers_install: __headers

  	$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
  	  $(error Headers not exportable for the $(SRCARCH) architecture))
  	$(Q)$(MAKE) $(hdr-inst)=include/uapi
  	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)

  PHONY += headers_check_all
  headers_check_all: headers_install_all

  	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check

  PHONY += headers_check
  headers_check: headers_install

  	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
  	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1

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

  # Kernel selftest
  
  PHONY += kselftest
  kselftest:
  	$(Q)$(MAKE) -C tools/testing/selftests run_tests
  
  # ---------------------------------------------------------------------------

  # Modules
  
  ifdef CONFIG_MODULES

  # By default, build modules as well

  all: modules

  # Build modules

  #

  # A module can be listed more than once in obj-m resulting in
  # duplicate lines in modules.order files.  Those are removed
  # using awk while concatenating to the final file.

  PHONY += modules

  modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin

  	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order

  	@$(kecho) '  Building modules, stage 2.';

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

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild

  modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
  	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin

  %/modules.builtin: include/config/auto.conf

  	$(Q)$(MAKE) $(modbuiltin)=$*

  
  # 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_:

  	@rm -rf $(MODLIB)/kernel
  	@rm -f $(MODLIB)/source
  	@mkdir -p $(MODLIB)/kernel

  	@ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source

  	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
  		rm -f $(MODLIB)/build ; \

  		ln -s $(CURDIR) $(MODLIB)/build ; \

  	fi

  	@cp -f $(objtree)/modules.order $(MODLIB)/

  	@cp -f $(objtree)/modules.builtin $(MODLIB)/

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

  # 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.

  PHONY += _modinst_post

  _modinst_post: _modinst_

  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst

  	$(call cmd,depmod)

  ifeq ($(CONFIG_MODULE_SIG), y)
  PHONY += modules_sign
  modules_sign:
  	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
  endif

  else # CONFIG_MODULES
  
  # Modules not configured
  # ---------------------------------------------------------------------------
  
  modules modules_install: FORCE

  	@echo >&2
  	@echo >&2 "The present kernel configuration has modules disabled."
  	@echo >&2 "Type 'make config' and enable loadable module support."
  	@echo >&2 "Then build a kernel with module support enabled."
  	@echo >&2

  	@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)

  
  # Directories & files removed with 'make mrproper'

  MRPROPER_DIRS  += include/config usr/include include/generated          \

  		  arch/*/include/generated .tmp_objdiff

  MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \

  		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
  		  signing_key.priv signing_key.x509 x509.genkey		\
  		  extra_certificates signing_key.x509.keyid		\

  		  signing_key.x509.signer include/linux/version.h

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

  clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)

  PHONY += $(clean-dirs) clean archclean vmlinuxclean

  $(clean-dirs):
  	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)

  vmlinuxclean:
  	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
  
  clean: archclean vmlinuxclean

  
  # 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 -name '*%'  -o -name 'core' \) \

  		-type f -print | xargs rm -f
  
  
  # Packaging of the kernel to various formats
  # ---------------------------------------------------------------------------
  # rpm target kept for backward compatibility

  package-dir	:= scripts/package

  %src-pkg: FORCE
  	$(Q)$(MAKE) $(build)=$(package-dir) $@

  %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 $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)

  boards := $(notdir $(boards))

  board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  board-dirs := $(sort $(notdir $(board-dirs:/=)))

  
  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  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
  	@echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'

  	@echo  '  dir/            - Build all files in dir and below'

  	@echo  '  dir/file.[oisS] - Build specified target only'
  	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
  	@echo  '                    (requires a recent binutils and recent build (System.map))'

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

  	@echo  '  modules_prepare - Set up for building external modules'

  	@echo  '  tags/TAGS	  - Generate tags file for editors'
  	@echo  '  cscope	  - Generate cscope index'

  	@echo  '  gtags           - Generate GNU GLOBAL index'

  	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
  	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
  	@echo  '  image_name	  - Output the image name (use with make -s)'

  	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \

  	 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'

  	@echo  '  versioncheck    - Sanity check on version.h usage'

  	@echo  '  includecheck    - Check for duplicate included header files'

  	@echo  '  export_report   - List the usages of all exported symbols'

  	@echo  '  headers_check   - Sanity check on exported headers'

  	@echo  '  headerdep       - Detect inclusion cycles in headers'
  	@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
  	@echo  ''

  	@echo  'Kernel selftest'
  	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
  	@echo  '                    Build, install, and boot kernel before'
  	@echo  '                    running kselftest on it'
  	@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 ($(SRCARCH)):'

  	@$(if $(archhelp),$(archhelp),\

  		echo '  No architecture specific help defined for $(SRCARCH)')

  	@echo  ''
  	@$(if $(boards), \
  		$(foreach b, $(boards), \
  		printf "  %-24s - Build for %s\
  " $(b) $(subst _defconfig,,$(b));) \
  		echo '')

  	@$(if $(board-dirs), \
  		$(foreach b, $(board-dirs), \
  		printf "  %-16s - Show %s-specific targets\
  " help-$(b) $(b);) \
  		printf "  %-16s - Show all of the above\
  " help-boards; \
  		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  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'

  	@echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
  	@echo  '		1: warnings which may be relevant and do not occur too often'
  	@echo  '		2: warnings which occur quite often but may still be relevant'
  	@echo  '		3: more obscure warnings, can most likely be ignored'

  	@echo  '		Multiple levels can be combined with W=12 or W=123'

  	@echo  ''
  	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
  	@echo  'For further info see the ./README file'

  help-board-dirs := $(addprefix help-,$(board-dirs))
  
  help-boards: $(help-board-dirs)
  
  boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  
  $(help-board-dirs): help-%:
  	@echo  'Architecture specific targets ($(SRCARCH) $*):'
  	@$(if $(boards-per-dir), \
  		$(foreach b, $(boards-per-dir), \
  		printf "  %-24s - Build for %s\
  " $*/$(b) $(subst _defconfig,,$(b));) \
  		echo '')

  # Documentation targets
  # ---------------------------------------------------------------------------
  %docs: scripts_basic FORCE

  	$(Q)$(MAKE) $(build)=scripts build_docproc

  	$(Q)$(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:

  	$(cmd_crmodverdir)

  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)

  	@$(kecho) '  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

  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: rm-files := $(KBUILD_EXTMOD)/Module.symvers

  
  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

  clean: $(clean-dirs)
  	$(call cmd,rmdirs)
  	$(call cmd,rmfiles)

  	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \

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

  		-o -name '*.ko.*' \

  		-o -name '*.dwo'  \

  		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  		-o -name '*.symtypes' -o -name 'modules.order' \
  		-o -name modules.builtin -o -name '.tmp_*.o.*' \
  		-o -name '*.gcno' \) -type f -print | xargs rm -f

  # Generate tags for editors
  # ---------------------------------------------------------------------------

  quiet_cmd_tags = GEN     $@
        cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@

  tags TAGS cscope gtags: FORCE

  	$(call cmd,tags)

  # Scripts to check various things for consistency
  # ---------------------------------------------------------------------------

  PHONY += includecheck versioncheck coccicheck namespacecheck export_report

  includecheck:

  	find $(srctree)/* $(RCS_FIND_IGNORE) \

  		-name '*.[hcS]' -type f -print | sort \

  		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl

  
  versioncheck:

  	find $(srctree)/* $(RCS_FIND_IGNORE) \

  		-name '*.[hcS]' -type f -print | sort \

  		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl

  coccicheck:
  	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@

  namespacecheck:
  	$(PERL) $(srctree)/scripts/namespace.pl

  export_report:
  	$(PERL) $(srctree)/scripts/export_report.pl

  endif #ifeq ($(config-targets),1)
  endif #ifeq ($(mixed-targets),1)

  PHONY += checkstack kernelrelease kernelversion image_name

  # 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:
  	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"

  kernelversion:

  	@echo $(KERNELVERSION)

  image_name:
  	@echo $(KBUILD_IMAGE)

  # Clear a bunch of variables before executing the submake
  tools/: FORCE

  	$(Q)mkdir -p $(objtree)/tools

  	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/

  
  tools/%: FORCE

  	$(Q)mkdir -p $(objtree)/tools

  	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*

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

  # Single targets are compatible with:

  # - build with 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
  	$(cmd_crmodverdir)
  	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  	$(build)=$(build-dir)