VERSION = 2
PATCHLEVEL = 5
SUBLEVEL = 31
EXTRAVERSION =

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

# 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 of
# 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.

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

# 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/)
ARCH := $(SUBARCH)

KERNELPATH=kernel-$(shell echo $(KERNELRELEASE) | sed -e "s/-//g")

CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
	  else if [ -x /bin/bash ]; then echo /bin/bash; \
	  else echo sh; fi ; fi)
TOPDIR	:= $(CURDIR)

HPATH   	= $(TOPDIR)/include
FINDHPATH	= $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net

HOSTCC  	= gcc
HOSTCFLAGS	= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer

CROSS_COMPILE 	=

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

all:	vmlinux

#	Print entire command lines instead of short version
#	For now, leave the default

ifndef KBUILD_VERBOSE
  KBUILD_VERBOSE = 1
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.

ifeq ($(MAKECMDGOALS),modules)
  KBUILD_BUILTIN :=
endif

#	If we have "make <whatever> modules", compile modules
#	in addition to whatever we do anyway.

ifneq ($(filter modules,$(MAKECMDGOALS)),)
  KBUILD_MODULES := 1
endif

#	Just "make" or "make all" shall build modules as well

ifeq ($(MAKECMDGOALS),)
  KBUILD_MODULES := 1
endif

ifneq ($(filter all,$(MAKECMDGOALS)),)
  KBUILD_MODULES := 1
endif

export KBUILD_MODULES KBUILD_BUILTIN

# 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 wil be printed at all, since
# the variable $(silent_cmd_cc_o_c) doesn't exist.

#	If the user wants quiet mode, echo short versions of the commands 
#	only and suppress the 'Entering/Leaving directory' messages

ifneq ($(KBUILD_VERBOSE),1)
  quiet=quiet_
  MAKEFLAGS += --no-print-directory
endif

#	If the user is running make -s (silent mode), suppress echoing of
#	commands

ifneq ($(findstring s,$(MAKEFLAGS)),)
  quiet=silent_
endif

export quiet

#
# Include the 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
MAKEFILES	= $(TOPDIR)/.config
GENKSYMS	= /sbin/genksyms
DEPMOD		= /sbin/depmod
PERL		= perl
MODFLAGS	= -DMODULE
CFLAGS_MODULE   = $(MODFLAGS)
AFLAGS_MODULE   = $(MODFLAGS)
CFLAGS_KERNEL	=
AFLAGS_KERNEL	=
EXPORT_FLAGS    =
NOSTDINC_FLAGS  = -nostdinc -iwithprefix include

export	VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
	CONFIG_SHELL TOPDIR HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
	CPP AR NM STRIP OBJCOPY OBJDUMP MAKE MAKEFILES GENKSYMS PERL

export CPPFLAGS EXPORT_FLAGS NOSTDINC_FLAGS OBJCOPYFLAGS
export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 
export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE

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

export srctree objtree

SUBDIRS		:= init kernel mm fs ipc lib drivers sound net security


noconfig_targets := xconfig menuconfig config oldconfig randconfig \
		    defconfig allyesconfig allnoconfig allmodconfig \
		    clean mrproper distclean \
		    help tags TAGS sgmldocs psdocs pdfdocs htmldocs \
		    checkconfig checkhelp checkincludes

# Helpers built in scripts/
# ---------------------------------------------------------------------------

scripts/docproc scripts/fixdep scripts/split-include : scripts ;

.PHONY: scripts
scripts:
	@$(MAKE) -C scripts

ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)

# Here goes the main Makefile
# ===========================================================================
#
# If the user gave a *config target, it'll be handled in another
# section below, since in this case we cannot include .config
# Same goes for other targets like clean/mrproper etc, which
# don't need .config, either

#	In this section, we need .config

-include .config

#	If .config doesn't exist - tough luck

.config:
	@echo '***'
	@echo '*** You have not yet configured your kernel!'
	@echo '*** Please run some configurator (do "make xconfig" or'
	@echo '*** "make menuconfig" or "make oldconfig" or "make config").'
	@echo '***'
	@exit 1

#
# INSTALL_PATH specifies where to place the updated kernel and system map
# images.  Uncomment if you want to place them anywhere other than root.
#

#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 arguement can be passed to make if needed.
#

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

#
# standard CFLAGS
#

CPPFLAGS := -D__KERNEL__ -I$(HPATH)

CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
	  -fomit-frame-pointer -fno-strict-aliasing -fno-common
AFLAGS := -D__ASSEMBLY__ $(CPPFLAGS)

ifdef CONFIG_MODULES
EXPORT_FLAGS := -DEXPORT_SYMTAB
endif

# Link components for vmlinux
# ---------------------------------------------------------------------------

INIT		:= init/init.o
CORE_FILES	:= kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o security/built-in.o
LIBS		:= lib/lib.a
DRIVERS		:= drivers/built-in.o sound/sound.o
NETWORKS	:= net/network.o

include arch/$(ARCH)/Makefile

export	NETWORKS DRIVERS LIBS HEAD LDFLAGS MAKEBOOT ASFLAGS

# boot target
# ---------------------------------------------------------------------------

boot: vmlinux
	@$(MAKE) -C arch/$(ARCH)/boot

# Build vmlinux
# ---------------------------------------------------------------------------

#	This is a bit tricky: If we need to relink vmlinux, we want
#	the version number incremented, which means recompile init/version.o
#	and relink init/init.o. However, we cannot do this during the
#       normal descending-into-subdirs phase, since at that time
#       we cannot yet know if we will need to relink vmlinux.
#	So we descend into init/ inside the rule for vmlinux again.

vmlinux-objs := $(HEAD) $(INIT) $(CORE_FILES) $(LIBS) $(DRIVERS) $(NETWORKS)

quiet_cmd_link_vmlinux = LD     $@
cmd_link_vmlinux = $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $(HEAD) $(INIT) \
		--start-group \
		$(CORE_FILES) \
		$(LIBS) \
		$(DRIVERS) \
		$(NETWORKS) \
		--end-group \
		-o vmlinux

#	set -e makes the rule exit immediately on error

define rule_link_vmlinux
	set -e
	echo '  Generating build number'
	. scripts/mkversion > .tmpversion
	mv -f .tmpversion .version
	+$(MAKE) -C init
	$(call cmd,link_vmlinux)
	echo 'cmd_$@ := $(cmd_link_vmlinux)' > $(@D)/.$(@F).cmd
	$(NM) vmlinux | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort > System.map
endef

vmlinux: $(vmlinux-objs) FORCE
	$(call if_changed_rule,link_vmlinux)

#	The actual objects are generated when descending, 
#	make sure no implicit rule kicks in

$(sort $(vmlinux-objs)): $(SUBDIRS) ;

# 	Handle descending into subdirectories listed in $(SUBDIRS)

.PHONY: $(SUBDIRS)
$(SUBDIRS): .hdepend prepare
	@$(MAKE) -C $@

#	Things we need done before we descend to build or make
#	module versions are listed in "prepare"

.PHONY: prepare
prepare: include/linux/version.h include/asm include/config/MARKER
	@echo '  Starting the build. KBUILD_BUILTIN=$(KBUILD_BUILTIN) KBUILD_MODULES=$(KBUILD_MODULES)'

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

%.s: %.c FORCE
	@$(MAKE) -C $(@D) $(@F)
%.i: %.c FORCE
	@$(MAKE) -C $(@D) $(@F)
%.o: %.c FORCE
	@$(MAKE) -C $(@D) $(@F)
%.lst: %.c FORCE
	@$(MAKE) -C $(@D) $(@F)
%.s: %.S FORCE
	@$(MAKE) -C $(@D) $(@F)
%.o: %.S FORCE
	@$(MAKE) -C $(@D) $(@F)

# 	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 '  Making asm->asm-$(ARCH) symlink'
	@ln -s asm-$(ARCH) $@

# 	Split autoconf.h into include/linux/config/*

include/config/MARKER: scripts/split-include include/linux/autoconf.h
	@echo '  SPLIT  include/linux/autoconf.h -> include/config/*'
	@scripts/split-include include/linux/autoconf.h include/config
	@touch $@

# 	if .config is newer than include/linux/autoconf.h, someone tinkered
# 	with it and forgot to run make oldconfig

include/linux/autoconf.h: .config
	@echo '***'
	@echo '*** You changed .config w/o running make *config?'
	@echo '*** Please run "make oldconfig"'
	@echo '***'
	@exit 1

# Generate some files
# ---------------------------------------------------------------------------

#	version.h changes when $(KERNELRELEASE) etc change, as defined in
#	this Makefile

uts_len := 64

include/linux/version.h: Makefile
	@if expr length "$(KERNELRELEASE)" \> $(uts_len) >/dev/null ; then \
	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
	  exit 1; \
	fi;
	@echo -n '  Generating $@'
	@(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
	  echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
	 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
	) > $@.tmp
	@$(update-if-changed)

# Generate module versions
# ---------------------------------------------------------------------------

# 	The targets are still named depend / dep for traditional
#	reasons, but the only thing we do here is generating
#	the module version checksums.

.PHONY: depend dep $(patsubst %,_sfdep_%,$(SUBDIRS))

depend dep: .hdepend

#	.hdepend is our (misnomed) marker for whether we've run
#	generated module versions

.hdepend: $(if $(filter dep depend,$(MAKECMDGOALS)),FORCE)
	@$(MAKE) include/linux/modversions.h
	@touch $@

ifdef CONFIG_MODVERSIONS

# 	Update modversions.h, but only if it would change.

include/linux/modversions.h: scripts/fixdep prepare FORCE
	@rm -rf .tmp_export-objs
	@$(MAKE) $(patsubst %,_sfdep_%,$(SUBDIRS))
	@echo -n '  Generating $@'
	@( echo "#ifndef _LINUX_MODVERSIONS_H";\
	   echo "#define _LINUX_MODVERSIONS_H"; \
	   echo "#include <linux/modsetver.h>"; \
	   for f in `cd .tmp_export-objs; find modules -name SCCS -prune -o -name BitKeeper -prune -o -name \*.ver -print | sort`; do \
	     echo "#include <linux/$${f}>"; \
	   done; \
	   echo "#endif"; \
	) > $@.tmp; \
	$(update-if-changed)

$(patsubst %,_sfdep_%,$(SUBDIRS)): FORCE
	@$(MAKE) -C $(patsubst _sfdep_%, %, $@) fastdep

else # !CONFIG_MODVERSIONS

.PHONY: include/linux/modversions.h

include/linux/modversions.h:

endif # CONFIG_MODVERSIONS

# ---------------------------------------------------------------------------
# Modules

ifdef CONFIG_MODULES

#	Build modules

ifdef CONFIG_MODVERSIONS
MODFLAGS += -include $(HPATH)/linux/modversions.h
endif

.PHONY: modules
modules: $(SUBDIRS)

#	Install modules

.PHONY: modules_install
modules_install: _modinst_ $(patsubst %, _modinst_%, $(SUBDIRS)) _modinst_post

.PHONY: _modinst_
_modinst_:
	@rm -rf $(MODLIB)/kernel
	@rm -f $(MODLIB)/build
	@mkdir -p $(MODLIB)/kernel
	@ln -s $(TOPDIR) $(MODLIB)/build

# 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:
	if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi

.PHONY: $(patsubst %, _modinst_%, $(SUBDIRS))
$(patsubst %, _modinst_%, $(SUBDIRS)) :
	@$(MAKE) -C $(patsubst _modinst_%, %, $@) modules_install

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

# Generate asm-offsets.h 
# ---------------------------------------------------------------------------

define generate-asm-offsets.h
	(set -e; \
	 echo "#ifndef __ASM_OFFSETS_H__"; \
	 echo "#define __ASM_OFFSETS_H__"; \
	 echo "/*"; \
	 echo " * DO NOT MODIFY."; \
	 echo " *"; \
	 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
	 echo " *"; \
	 echo " */"; \
	 echo ""; \
	 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
	 echo ""; \
	 echo "#endif" )
endef

# RPM target
# ---------------------------------------------------------------------------

#	If you do a make spec before packing the tarball you can rpm -ta it

spec:
	. scripts/mkspec >kernel.spec

#	Build a tar ball, generate an rpm from it and pack the result
#	There arw two bits of magic here
#	1) The use of /. to avoid tar packing just the symlink
#	2) Removing the .dep files as they have source paths in them that
#	   will become invalid

rpm:	clean spec
	find . -name SCCS -prune -o -name BitKeeper -prune -o \
		\( -size 0 -o -name .depend -o -name .hdepend \) \
		-type f -print | xargs rm -f
	set -e; \
	cd $(TOPDIR)/.. ; \
	ln -sf $(TOPDIR) $(KERNELPATH) ; \
	tar -cvz --exclude CVS -f $(KERNELPATH).tar.gz $(KERNELPATH)/. ; \
	rm $(KERNELPATH) ; \
	cd $(TOPDIR) ; \
	. scripts/mkversion > .version ; \
	rpm -ta $(TOPDIR)/../$(KERNELPATH).tar.gz ; \
	rm $(TOPDIR)/../$(KERNELPATH).tar.gz

else # ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)

ifeq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)

# Targets which don't need .config
# ===========================================================================
#
# These targets basically have their own Makefile - not quite, but at
# least its own exclusive section in the same Makefile. The reason for
# this is the following:
# To know the configuration, the main Makefile has to include
# .config. That's a obviously a problem when .config doesn't exist
# yet, but that could be kludged around with only including it if it
# exists.
# However, the larger problem is: If you run make *config, make will
# include the old .config, then execute your *config. It will then
# notice that a piece it included (.config) did change and restart from
# scratch. Which will cause execution of *config again. You get the
# picture.
# If we don't explicitly let the Makefile know that .config is changed
# by *config (the old way), it won't reread .config after *config,
# thus working with possibly stale values - we don't that either.
#
# So we divide things: This part here is for making *config targets,
# and other targets which should work when no .config exists yet.
# The main part above takes care of the rest after a .config exists.

# Kernel configuration
# ---------------------------------------------------------------------------

.PHONY: oldconfig xconfig menuconfig config \
	make_with_config

xconfig:
	@$(MAKE) -C scripts kconfig.tk
	wish -f scripts/kconfig.tk

menuconfig:
	@$(MAKE) -C scripts lxdialog
	$(CONFIG_SHELL) scripts/Menuconfig arch/$(ARCH)/config.in

config:
	$(CONFIG_SHELL) scripts/Configure arch/$(ARCH)/config.in

oldconfig:
	$(CONFIG_SHELL) scripts/Configure -d arch/$(ARCH)/config.in

randconfig:
	$(CONFIG_SHELL) scripts/Configure -r arch/$(ARCH)/config.in

allyesconfig:
	$(CONFIG_SHELL) scripts/Configure -y arch/$(ARCH)/config.in

allnoconfig:
	$(CONFIG_SHELL) scripts/Configure -n arch/$(ARCH)/config.in

allmodconfig:
	$(CONFIG_SHELL) scripts/Configure -m arch/$(ARCH)/config.in

defconfig:
	yes '' | $(CONFIG_SHELL) scripts/Configure -d arch/$(ARCH)/config.in

# Cleaning up
# ---------------------------------------------------------------------------

#	files removed with 'make clean'
CLEAN_FILES += \
	include/linux/compile.h \
	vmlinux System.map \
	drivers/char/consolemap_deftbl.c drivers/video/promcon_tbl.c \
	drivers/char/conmakehash \
	drivers/char/drm/*-mod.c \
	drivers/char/defkeymap.c drivers/char/qtronixmap.c \
	drivers/pci/devlist.h drivers/pci/classlist.h drivers/pci/gen-devlist \
	drivers/zorro/devlist.h drivers/zorro/gen-devlist \
	sound/oss/bin2hex sound/oss/hex2hex \
	drivers/atm/fore200e_mkfirm drivers/atm/{pca,sba}*{.bin,.bin1,.bin2} \
	drivers/scsi/aic7xxx/aic7xxx_seq.h \
	drivers/scsi/aic7xxx/aic7xxx_reg.h \
	drivers/scsi/aic7xxx/aicasm/aicasm_gram.c \
	drivers/scsi/aic7xxx/aicasm/aicasm_scan.c \
	drivers/scsi/aic7xxx/aicasm/y.tab.h \
	drivers/scsi/aic7xxx/aicasm/aicasm \
	drivers/scsi/53c700_d.h drivers/scsi/sim710_d.h \
	drivers/scsi/53c7xx_d.h drivers/scsi/53c7xx_u.h \
	drivers/scsi/53c8xx_d.h drivers/scsi/53c8xx_u.h \
	net/802/cl2llc.c net/802/transit/pdutr.h net/802/transit/timertr.h \
	net/802/pseudo/pseudocode.h \
	net/khttpd/make_times_h net/khttpd/times.h \
	submenu*

# 	files removed with 'make mrproper'
MRPROPER_FILES += \
	include/linux/autoconf.h include/linux/version.h \
	drivers/net/hamradio/soundmodem/sm_tbl_{afsk1200,afsk2666,fsk9600}.h \
	drivers/net/hamradio/soundmodem/sm_tbl_{hapn4800,psk4800}.h \
	drivers/net/hamradio/soundmodem/sm_tbl_{afsk2400_7,afsk2400_8}.h \
	drivers/net/hamradio/soundmodem/gentbl \
	sound/oss/*_boot.h sound/oss/.*.boot \
	sound/oss/msndinit.c \
	sound/oss/msndperm.c \
	sound/oss/pndsperm.c \
	sound/oss/pndspini.c \
	drivers/atm/fore200e_*_fw.c drivers/atm/.fore200e_*.fw \
	.version .config* config.in config.old \
	scripts/tkparse scripts/kconfig.tk scripts/kconfig.tmp \
	scripts/lxdialog/*.o scripts/lxdialog/lxdialog \
	.menuconfig.log \
	include/asm \
	.hdepend scripts/split-include scripts/docproc \
	scripts/fixdep $(TOPDIR)/include/linux/modversions.h \
	tags TAGS kernel.spec \
	.tmpversion

# 	directories removed with 'make mrproper'
MRPROPER_DIRS += \
	.tmp_export-objs \
	include/config \
	$(TOPDIR)/include/linux/modules

#	That's our way to know about arch specific cleanup.

include arch/$(ARCH)/Makefile

clean:	archclean
	@echo 'Cleaning up'
	@find . -name SCCS -prune -o -name BitKeeper -prune -o \
		\( -name \*.[oas] -o -name core -o -name .\*.cmd -o \
		-name .\*.tmp -o -name .\*.d \) -type f -print \
		| grep -v lxdialog/ | xargs rm -f
	@rm -f $(CLEAN_FILES)
	@$(MAKE) -f Documentation/DocBook/Makefile clean

mrproper: clean archmrproper
	@echo 'Making mrproper'
	@find . -name SCCS -prune -o -name BitKeeper -prune -o \
		\( -name .depend -o -name .\*.cmd \) \
		-type f -print | xargs rm -f
	@rm -f $(MRPROPER_FILES)
	@rm -rf $(MRPROPER_DIRS)
	@$(MAKE) -f Documentation/DocBook/Makefile mrproper

distclean: mrproper
	@echo 'Making distclean'
	@find . -name SCCS -prune -o -name BitKeeper -prune -o \
		\( -not -type d \) -and \
	 	\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
	 	-o -name '.*.rej' -o -name '.SUMS' -o -size 0 \) -type f \
		-print | xargs rm -f

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

TAGS: FORCE
	{ find include/asm-${ARCH} -name SCCS -prune -o -name BitKeeper -prune \
		-o -name '*.h' -print ; \
	find include -name SCCS -prune -o -name BitKeeper -prune -o \
		-type d \( -name "asm-*" -o -name config \) -prune -o \
		-name '*.h' -print ; \
	find $(SUBDIRS) init arch/${ARCH} \
		-name SCCS -prune -o -name BitKeeper -prune -o \
		-name '*.[chS]' -print ; } | grep -v SCCS | etags -

# 	Exuberant ctags works better with -I
tags: FORCE
	CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \
	ctags $$CTAGSF `find include/asm-$(ARCH) -name SCCS -prune -o -name BitKeeper -prune -o -name '*.h' -print` && \
	find include -name SCCS -prune -o -name BitKeeper -prune -o \
		-type d \( -name "asm-*" -o -name config \) -prune -o \
		-name '*.h' -print | xargs ctags $$CTAGSF -a && \
	find $(SUBDIRS) init -name SCCS -prune -o -name BitKeeper -prune -o \
		-name '*.[ch]' -print | xargs ctags $$CTAGSF -a

# Brief documentation of the typical targets used
# ---------------------------------------------------------------------------

help:
	@echo  'Cleaning targets:'
	@echo  '  clean		- remove most generated files but keep the config'
	@echo  '  mrproper	- remove all generated files including the config'
	@echo  '  distclean	- mrproper + remove files generated by editors and patch'
	@echo  ''
	@echo  'Configuration targets:'
	@echo  '  oldconfig	- Update current config utilising a line-oriented program'
	@echo  '  menuconfig	- Update current config utilising a menu based program'
	@echo  '  xconfig	- Update current config utilising a X-based program'
	@echo  '  defconfig	- New config with default answer to all options'
	@echo  '  allmodconfig	- New config selecting modules when possible'
	@echo  '  allyesconfig	- New config where all options are accepted with yes'
	@echo  '  allnoconfig	- New minimal config'
	@echo  ''
	@echo  'Other generic targets:'
	@echo  '  all		- Build all targets marked with [*]'
	@echo  '  dep           - Create module version information'
	@echo  '* vmlinux	- Build the bare kernel'
	@echo  '* modules	- Build all modules'
	@echo  '  dir/file.[ois]- Build specified target only'
	@echo  '  rpm		- Build a kernel as an RPM package'
	@echo  '  tags/TAGS	- Generate tags file for editors'
	@echo  ''
	@echo  'Documentation targets:'
	@$(MAKE) --no-print-directory -f Documentation/DocBook/Makefile dochelp
	@echo  ''
	@echo  'Architecture specific targets ($(ARCH)):'
	@$(MAKE) --no-print-directory -f arch/$(ARCH)/boot/Makefile archhelp
	@echo  ''
	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
	@echo  'For further info browse Documentation/kbuild/*'
 

# Documentation targets
# ---------------------------------------------------------------------------
sgmldocs psdocs pdfdocs htmldocs: scripts
	@$(MAKE) -f Documentation/DocBook/Makefile $@

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

checkconfig:
	find * -name SCCS -prune -o -name BitKeeper -prune -o \
		-name '*.[hcS]' -type f -print | sort \
		| xargs $(PERL) -w scripts/checkconfig.pl

checkhelp:
	find * -name SCCS -prune -o -name BitKeeper -prune -o \
		-name [cC]onfig.in -print | sort \
		| xargs $(PERL) -w scripts/checkhelp.pl

checkincludes:
	find * -name SCCS -prune -o -name BitKeeper -prune -o \
		-name '*.[hcS]' -type f -print | sort \
		| xargs $(PERL) -w scripts/checkincludes.pl

else # ifneq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)

# We're called with both targets which do and do not need
# .config included. Handle them one after the other.
# ===========================================================================

%:: FORCE
	$(MAKE) $@

endif # ifeq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
endif # ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)

# FIXME Should go into a make.lib or something 
# ===========================================================================

# read all saved command lines

cmd_files := $(wildcard .*.cmd)
ifneq ($(cmd_files),)
  include $(cmd_files)
endif

# Usage: $(call if_changed_rule,foo)
# will check if $(cmd_foo) changed, or any of the prequisites changed,
# and if so will execute $(rule_foo)

if_changed_rule = $(if $(strip $? \
		               $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
			       $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
	               @$(rule_$(1)))

# If quiet is set, only print short version of command

cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))

define update-if-changed
	if [ -r $@ ] && cmp -s $@ $@.tmp; then \
		echo ' (unchanged)'; \
		rm -f $@.tmp; \
	else \
		echo ' (updated)'; \
		mv -f $@.tmp $@; \
	fi
endef


FORCE: