blob: db1ddc1ed6e6d3cdf014dcadd553b8e15d35059d [file] [log] [blame]
VERSION = 2
PATCHLEVEL = 5
SUBLEVEL = 21
EXTRAVERSION =
# 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)
ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/)
KERNELPATH=kernel-$(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
KBUILD_MODULES := 1
KBUILD_BUILTIN := 1
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 = $(MODFLAGS)
CFLAGS_KERNEL =
AFLAGS_KERNEL =
EXPORT_FLAGS =
NOSTDINC_FLAGS = -nostdinc -iwithprefix include
export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
CONFIG_SHELL TOPDIR HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
CPP AR NM STRIP OBJCOPY OBJDUMP MAKE MAKEFILES GENKSYMS PERL
export CPPFLAGS EXPORT_FLAGS NOSTDINC_FLAGS
export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
noconfig_targets := xconfig menuconfig config oldconfig randconfig \
defconfig allyesconfig allnoconfig allmodconfig \
clean mrproper distclean
ifeq ($(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 "make xconfig/menuconfig/config/oldconfig"'
@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__ $(CPPFLAGS)
ifdef CONFIG_MODULES
EXPORT_FLAGS := -DEXPORT_SYMTAB
endif
# Link components for vmlinux
# ---------------------------------------------------------------------------
SUBDIRS := init kernel mm fs ipc lib drivers sound net
INIT := init/init.o
CORE_FILES := kernel/kernel.o mm/mm.o fs/fs.o ipc/ipc.o
LIBS := lib/lib.a
DRIVERS := drivers/built-in.o sound/sound.o
NETWORKS := net/network.o
include arch/$(ARCH)/Makefile
export NETWORKS DRIVERS LIBS HEAD LDFLAGS LINKFLAGS 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) $(LINKFLAGS) $(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,cmd_link_vmlinux)
$(cmd_link_vmlinux)
echo 'cmd_$@ := $(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)
$(SUBDIRS): .hdepend prepare include/config/MARKER
@$(MAKE) -C $@
# Things we need done before we descend to build or make
# module versions are listed in "prepare"
.PHONY: prepare
prepare: include/linux/version.h include/asm
# Single targets
# ---------------------------------------------------------------------------
%.s: %.c FORCE
@$(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 'Splitting 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)
# Helpers built in scripts/
# ---------------------------------------------------------------------------
scripts/fixdep scripts/split-include : scripts ;
.PHONY: scripts
scripts:
@$(MAKE) -C scripts
# 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.
# FIXME: For now, we are also calling "archdep" from here,
# which should be replaced by a more sensible solution.
.PHONY: depend dep $(patsubst %,_sfdep_%,$(SUBDIRS))
depend dep: .hdepend
# .hdepend is our (misnomed) marker for whether we've run
# generated module versions and made archdep
.hdepend: $(if $(filter dep depend,$(MAKECMDGOALS)),FORCE)
@$(MAKE) archdep 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 \*.ver -print`; 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 $(HPATH)/linux/modversions.h
endif
.PHONY: modules
modules:
@$(MAKE) KBUILD_BUILTIN= $(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
# Scripts to check various things for consistency
# ---------------------------------------------------------------------------
checkconfig:
find * -name '*.[hcS]' -type f -print | sort | xargs $(PERL) -w scripts/checkconfig.pl
checkhelp:
find * -name [cC]onfig.in -print | sort | xargs $(PERL) -w scripts/checkhelp.pl
checkincludes:
find * -name '*.[hcS]' -type f -print | sort | xargs $(PERL) -w scripts/checkincludes.pl
# Generate tags for editors
# ---------------------------------------------------------------------------
TAGS: FORCE
{ find include/asm-${ARCH} -name '*.h' -print ; \
find include -type d \( -name "asm-*" -o -name config \) -prune -o -name '*.h' -print ; \
find $(SUBDIRS) init arch/${ARCH} -name '*.[chS]' ; } | 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 '*.h'` && \
find include -type d \( -name "asm-*" -o -name config \) -prune -o -name '*.h' -print | xargs ctags $$CTAGSF -a && \
find $(SUBDIRS) init -name '*.[ch]' | xargs ctags $$CTAGSF -a
# Assorted miscellaneous targets
# ---------------------------------------------------------------------------
# Documentation targets
sgmldocs psdocs pdfdocs htmldocs:
@$(MAKE) -C Documentation/DocBook $@
# 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 . \( -size 0 -o -name .depend -o -name .hdepend \) -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)),)
# 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
# How we generate .config depends on which *config the
# user chose when calling make
.config: $(filter oldconfig xconfig menuconfig config,$(MAKECMDGOALS)) ;
# If the user gave commands from both the need / need not
# .config sections, we need to call make again after
# .config is generated, now to take care of the remaining
# targets we know nothing about in this section
remaining_targets := $(filter-out $(noconfig_targets),$(MAKECMDGOALS))
$(remaining_targets) : make_with_config
make_with_config: .config
@$(MAKE) $(remaining_targets)
# Cleaning up
# ---------------------------------------------------------------------------
# files removed with 'make clean'
CLEAN_FILES += \
kernel/ksyms.lst include/linux/compile.h \
vmlinux System.map \
.tmp* \
drivers/char/consolemap_deftbl.c drivers/video/promcon_tbl.c \
drivers/char/conmakehash \
drivers/char/drm/*-mod.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 \
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 \
# directories removed with 'make mrproper'
MRPROPER_DIRS += \
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 . \( -name \*.[oas] -o -name core -o -name .\*.cmd -o \
-name .\*.tmp -o -name .\*.d \) -type f -print \
| grep -v lxdialog/ | xargs rm -f
@rm -rf $(CLEAN_FILES)
@$(MAKE) -C Documentation/DocBook clean
mrproper: clean archmrproper
@echo 'Making mrproper'
@find . \( -size 0 -o -name .depend \) -type f -print | xargs rm -f
@rm -f $(MRPROPER_FILES)
@rm -rf $(MRPROPER_DIRS)
@$(MAKE) -C Documentation/DocBook mrproper
distclean: mrproper
@echo 'Making distclean'
@find . \( -not -type d \) -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
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 rule
cmd = @$(if $($(quiet)$(1)),echo ' $($(quiet)$(1))' &&) $($(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: