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 = $(MODFLAGS) CFLAGS_KERNEL = AFLAGS_KERNEL = EXPORT_FLAGS = NOSTDINC_FLAGS = -nostdinc -iwithprefix include export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \ CONFIG_SHELL TOPDIR HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ CPP AR NM STRIP OBJCOPY OBJDUMP MAKE MAKEFILES GENKSYMS PERL export CPPFLAGS EXPORT_FLAGS NOSTDINC_FLAGS export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE noconfig_targets := xconfig menuconfig config oldconfig randconfig \ defconfig allyesconfig allnoconfig allmodconfig \ clean mrproper distclean \ tags TAGS sgmldocs psdocs pdfdocs htmldocs \ checkconfig checkhelp checkincludes ifeq ($(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) $(SUBDIRS): .hdepend prepare @$(MAKE) -C $@ # Things we need done before we descend to build or make # module versions are listed in "prepare" .PHONY: prepare prepare: include/linux/version.h include/asm include/config/MARKER # Single targets # --------------------------------------------------------------------------- %.s: %.c FORCE @$(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) # 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. .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 \*.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 $(HPATH)/linux/modversions.h endif .PHONY: modules modules: @$(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_%, %, $@) modules_install else # CONFIG_MODULES # Modules not configured # --------------------------------------------------------------------------- modules modules_install: FORCE @echo @echo "The present kernel configuration has modules disabled." @echo "Type 'make config' and enable loadable module support." @echo "Then build a kernel with module support enabled." @echo @exit 1 endif # CONFIG_MODULES # Generate asm-offsets.h # --------------------------------------------------------------------------- define generate-asm-offsets.h (set -e; \ echo "#ifndef __ASM_OFFSETS_H__"; \ echo "#define __ASM_OFFSETS_H__"; \ echo "/*"; \ echo " * DO NOT MODIFY."; \ echo " *"; \ echo " * This file was generated by arch/$(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 . \( -size 0 -o -name .depend -o -name .hdepend \) -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 += \ 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/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 \ .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 . \( -name \*.[oas] -o -name core -o -name .\*.cmd -o \ -name .\*.tmp -o -name .\*.d \) -type f -print \ | grep -v lxdialog/ | xargs rm -f @rm -f $(CLEAN_FILES) @$(MAKE) -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 # 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 # Documentation targets # --------------------------------------------------------------------------- sgmldocs psdocs pdfdocs htmldocs: @$(MAKE) -C Documentation/DocBook $@ endif # ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),) # 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 # 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: