VERSION = 2 PATCHLEVEL = 6 SUBLEVEL = 2 EXTRAVERSION =-rc1 # *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 print "Entering directory ..." MAKEFLAGS += --no-print-directory # We are using a recursive build, so we need to do a little thinking # to get the ordering right. # # Most importantly: sub-Makefiles should only ever modify files in # their own directory. If in some directory we have a dependency on # a file in another dir (which doesn't happen often, but it's 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. # To put more focus on warnings, be less verbose as default # Use 'make V=1' to see the full commands ifdef V ifeq ("$(origin V)", "command line") KBUILD_VERBOSE = $(V) endif endif ifndef KBUILD_VERBOSE KBUILD_VERBOSE = 0 endif # Call sparse as part of compilation of C files # Use 'make C=1' to enable sparse checking ifdef C ifeq ("$(origin C)", "command line") KBUILD_CHECKSRC = $(C) endif endif ifndef KBUILD_CHECKSRC KBUILD_CHECKSRC = 0 endif # kbuild supports saving output files in a separate directory. # To locate output files in a separate directory two syntax'es are supported. # In both cases the working directory must be the root of the kernel src. # 1) O= # Use "make O=dir/to/store/output/files/" # # 2) Set KBUILD_OUTPUT # Set the environment variable KBUILD_OUTPUT to point to the directory # where the output files shall be placed. # export KBUILD_OUTPUT=dir/to/store/output/files/ # make # # The O= assigment takes precedence over the KBUILD_OUTPUT environment variable. # KBUILD_SRC is set on invocation of make in OBJ directory # KBUILD_SRC is not intended to be used by the regular user (for now) ifeq ($(KBUILD_SRC),) # OK, Make called in directory where kernel src resides # Do we want to locate output files in a separate directory? ifdef O ifeq ("$(origin O)", "command line") KBUILD_OUTPUT := $(O) endif endif # That's our default target when none is given on the command line .PHONY: all all: ifneq ($(KBUILD_OUTPUT),) # Invoke a second make in the output directory, passing relevant variables # check that the output directory actually exists saved-output := $(KBUILD_OUTPUT) KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) $(if $(wildcard $(KBUILD_OUTPUT)),, \ $(error output directory "$(saved-output)" does not exist)) .PHONY: $(MAKECMDGOALS) $(filter-out all,$(MAKECMDGOALS)) all: $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ KBUILD_SRC=$(CURDIR) KBUILD_VERBOSE=$(KBUILD_VERBOSE) \ KBUILD_CHECK=$(KBUILD_CHECK) -f $(CURDIR)/Makefile $@ # Leave processing to above invocation of make skip-makefile := 1 endif # ifneq ($(KBUILD_OUTPUT),) endif # ifeq ($(KBUILD_SRC),) # We process the rest of the Makefile if this is the final invocation of make ifeq ($(skip-makefile),) srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) TOPDIR := $(srctree) # FIXME - TOPDIR is obsolete, use srctree/objtree objtree := $(CURDIR) src := $(srctree) obj := $(objtree) VPATH := $(srctree) export srctree objtree VPATH TOPDIR KERNELRELEASE=$(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/ \ -e s/s390x/s390/ -e s/parisc64/parisc/ ) # Cross compiling and selecting different set of gcc/bin-utils # --------------------------------------------------------------------------- # # When performing cross compilation for other architectures ARCH shall be set # to the target architecture. (See arch/* for the possibilities). # ARCH can be set during invocation of make: # make ARCH=ia64 # Another way is to have ARCH set in the environment. # The default ARCH is the host where make is executed. # CROSS_COMPILE specify the prefix used for all executables used # during compilation. Only gcc and related bin-utils executables # are prefixed with $(CROSS_COMPILE). # CROSS_COMPILE can be set on the command line # make CROSS_COMPILE=ia64-linux- # Alternatively CROSS_COMPILE can be set in the environment. # Default value for CROSS_COMPILE is not to prefix executables # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile ARCH ?= $(SUBARCH) CROSS_COMPILE ?= # Architecture as present in compile.h UTS_MACHINE := $(ARCH) # SHELL used by kbuild CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ else if [ -x /bin/bash ]; then echo /bin/bash; \ else echo sh; fi ; fi) HOSTCC = gcc HOSTCXX = g++ HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer HOSTCXXFLAGS = -O2 # Decide whether to build built-in, modular, or both. # Normally, just do built-in. KBUILD_MODULES := KBUILD_BUILTIN := 1 # If we have only "make modules", don't compile built-in objects. # When we're building modules with modversions, we need to consider # the built-in objects during the descend as well, in order to # make sure the checksums are uptodate 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 modules,$(MAKECMDGOALS)),) KBUILD_MODULES := 1 endif ifeq ($(MAKECMDGOALS),) KBUILD_MODULES := 1 endif export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE export KBUILD_CHECKSRC KBUILD_SRC # 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. # # A simple variant is to prefix commands with $(Q) - that's usefull # for commands that shall be hidden in non-verbose mode. # # $(Q)ln $@ :< # # If KBUILD_VERBOSE equals 0 then the above command will be hidden. # If KBUILD_VERBOSE equals 1 then the above command is displayed. ifeq ($(KBUILD_VERBOSE),1) quiet = Q = else quiet=quiet_ Q = @ endif # If the user is running make -s (silent mode), suppress echoing of # commands ifneq ($(findstring s,$(MAKEFLAGS)),) quiet=silent_ endif check_gcc = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) export quiet Q KBUILD_VERBOSE check_gcc # Look for make include files relative to root of kernel src MAKEFLAGS += --include-dir=$(srctree) # For maximum performance (+ possibly random breakage, uncomment # the following) #MAKEFLAGS += -rR # 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 RPM := $(shell if [ -x "/usr/bin/rpmbuild" ]; then echo rpmbuild; \ else echo rpm; fi) GENKSYMS = scripts/genksyms/genksyms DEPMOD = /sbin/depmod KALLSYMS = scripts/kallsyms PERL = perl CHECK = sparse MODFLAGS = -DMODULE CFLAGS_MODULE = $(MODFLAGS) AFLAGS_MODULE = $(MODFLAGS) LDFLAGS_MODULE = -r CFLAGS_KERNEL = AFLAGS_KERNEL = NOSTDINC_FLAGS = -nostdinc -iwithprefix include CPPFLAGS := -D__KERNEL__ -Iinclude \ $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -fno-common AFLAGS := -D__ASSEMBLY__ export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \ CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB LDFLAGS_MODULE CHECK export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE export MODVERDIR := .tmp_versions # The temporary file to save gcc -MD generated dependencies must not # contain a comma comma := , depfile = $(subst $(comma),_,$(@D)/.$(@F).d) # Files to ignore in find ... statements RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \) -prune -o RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS # =========================================================================== # Rules shared between *config targets and build targets # Helpers built in scripts/ scripts/docproc scripts/split-include : scripts ; .PHONY: scripts scripts/fixdep scripts: $(Q)$(MAKE) $(build)=scripts scripts/fixdep: $(Q)$(MAKE) $(build)=scripts $@ # To make sure we do not include .config for any of the *config targets # catch them early, and hand them over to scripts/kconfig/Makefile # It is allowed to specify more targets when calling make, including # mixing *config targets and build targets. # For example 'make oldconfig all'. # Detect when mixed targets is specified, and make a second invocation # of make so .config is not included in this case either (for *config). no-dot-config-targets := clean mrproper distclean \ cscope TAGS tags help %docs check% config-targets := 0 mixed-targets := 0 dot-config := 1 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) dot-config := 0 endif endif ifneq ($(filter config %config,$(MAKECMDGOALS)),) config-targets := 1 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) mixed-targets := 1 endif endif ifeq ($(mixed-targets),1) # =========================================================================== # We're called with mixed targets (*config and build targets). # Handle them one by one. %:: FORCE $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ else ifeq ($(config-targets),1) # =========================================================================== # *config targets only - make sure prerequisites are updated, and descend # in scripts/kconfig to make the *config target %config: scripts/fixdep FORCE $(Q)$(MAKE) $(build)=scripts/kconfig $@ config : scripts/fixdep FORCE $(Q)$(MAKE) $(build)=scripts/kconfig $@ else # =========================================================================== # Build targets only - this includes vmlinux, arch specific targets, clean # targets and others. In general all targets except *config targets. # That's our default target when none is given on the command line # Note that 'modules' will be added as a prerequisite as well, # in the CONFIG_MODULES part below all: vmlinux # Objects we will link into vmlinux / subdirs we need to visit init-y := init/ drivers-y := drivers/ sound/ net-y := net/ libs-y := lib/ core-y := usr/ SUBDIRS := ifeq ($(dot-config),1) # In this section, we need .config # Read in dependencies to all Kconfig* files, make sure to run # oldconfig if changes are detected. -include .config.cmd include .config # If .config needs to be updated, it will be done via the dependency # that autoconf has on .config. # To avoid any implicit rule to kick in, define an empty command .config: ; # If .config is newer than include/linux/autoconf.h, someone tinkered # with it and forgot to run make oldconfig include/linux/autoconf.h: .config $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig endif include $(srctree)/arch/$(ARCH)/Makefile # Let architecture Makefiles change CPPFLAGS if needed CFLAGS := $(CPPFLAGS) $(CFLAGS) AFLAGS := $(CPPFLAGS) $(AFLAGS) core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ SUBDIRS += $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ $(net-y) $(net-m) $(libs-y) $(libs-m))) ALL_SUBDIRS := $(sort $(SUBDIRS) $(patsubst %/,%,$(filter %/, \ $(init-n) $(init-) \ $(core-n) $(core-) $(drivers-n) $(drivers-) \ $(net-n) $(net-) $(libs-n) $(libs-)))) init-y := $(patsubst %/, %/built-in.o, $(init-y)) core-y := $(patsubst %/, %/built-in.o, $(core-y)) drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) net-y := $(patsubst %/, %/built-in.o, $(net-y)) libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) libs-y := $(libs-y1) $(libs-y2) # Here goes the main Makefile # --------------------------------------------------------------------------- ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE CFLAGS += -Os else CFLAGS += -O2 endif ifndef CONFIG_FRAME_POINTER CFLAGS += -fomit-frame-pointer endif ifdef CONFIG_DEBUG_INFO CFLAGS += -g endif # warn about C99 declaration after statement CFLAGS += $(call check_gcc,-Wdeclaration-after-statement,) # # 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 # 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. head-y += $(HEAD) vmlinux-objs := $(head-y) $(init-y) $(core-y) $(libs-y) $(drivers-y) $(net-y) quiet_cmd_vmlinux__ = LD $@ define cmd_vmlinux__ $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) $(head-y) $(init-y) \ --start-group \ $(core-y) \ $(libs-y) \ $(drivers-y) \ $(net-y) \ --end-group \ $(filter .tmp_kallsyms%,$^) \ -o $@ endef # set -e makes the rule exit immediately on error define rule_vmlinux__ +set -e; \ $(if $(filter .tmp_kallsyms%,$^),, \ echo ' GEN .version'; \ . $(srctree)/scripts/mkversion > .tmp_version; \ mv -f .tmp_version .version; \ $(MAKE) $(build)=init; \ ) \ $(if $($(quiet)cmd_vmlinux__), \ echo ' $($(quiet)cmd_vmlinux__)' &&) \ $(cmd_vmlinux__); \ echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd endef define rule_vmlinux $(rule_vmlinux__); \ $(NM) $@ | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort > System.map endef LDFLAGS_vmlinux += -T arch/$(ARCH)/kernel/vmlinux.lds.s # Generate section listing all symbols and add it into vmlinux # It's a three stage process: # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is # empty # Running kallsyms on that gives us .tmp_kallsyms1.o with # the right size # o .tmp_vmlinux2 now has a __kallsyms section of the right size, # but due to the added section, some addresses have shifted # From here, we generate a correct .tmp_kallsyms2.o # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. ifdef CONFIG_KALLSYMS kallsyms.o := .tmp_kallsyms2.o quiet_cmd_kallsyms = KSYM $@ cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) > $@ .tmp_kallsyms1.o .tmp_kallsyms2.o: %.o: %.S scripts FORCE $(call if_changed_dep,as_o_S) .tmp_kallsyms%.S: .tmp_vmlinux% $(call cmd,kallsyms) .tmp_vmlinux1: $(vmlinux-objs) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE +$(call if_changed_rule,vmlinux__) .tmp_vmlinux2: $(vmlinux-objs) .tmp_kallsyms1.o arch/$(ARCH)/kernel/vmlinux.lds.s FORCE $(call if_changed_rule,vmlinux__) endif # Finally the vmlinux rule vmlinux: $(vmlinux-objs) $(kallsyms.o) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE $(call if_changed_rule,vmlinux) # The actual objects are generated when descending, # make sure no implicit rule kicks in $(sort $(vmlinux-objs)) arch/$(ARCH)/kernel/vmlinux.lds.s: $(SUBDIRS) ; # Handle descending into subdirectories listed in $(SUBDIRS) .PHONY: $(SUBDIRS) $(SUBDIRS): prepare-all $(Q)$(MAKE) $(build)=$@ # Things we need to do before we recursively start building the kernel # or the modules are listed in "prepare-all". # A multi level approach is used. prepare1 is updated first, then prepare0. # prepare-all is the collection point for the prepare targets. .PHONY: prepare-all prepare prepare0 prepare1 # prepare1 is used to check if we are building in a separate output directory, # and if so do: # 1) Check that make has not been executed in the kernel src $(srctree) # 2) Create the include2 directory, used for the second asm symlink prepare1: ifneq ($(KBUILD_SRC),) @echo ' Using $(srctree) as source for kernel' $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \ echo " $(srctree) is not clean, please run 'make mrproper'";\ echo " in the '$(srctree)' directory.";\ /bin/false; \ fi; $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm endif prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER ifdef KBUILD_MODULES ifeq ($(origin SUBDIRS),file) $(Q)rm -rf $(MODVERDIR) else @echo '*** Warning: Overriding SUBDIRS on the command line can cause' @echo '*** inconsistencies' endif endif $(if $(CONFIG_MODULES),$(Q)mkdir -p $(MODVERDIR)) # All the preparing.. prepare-all: prepare0 prepare # Leave this as default for preprocessing vmlinux.lds.S, which is now # done in arch/$(ARCH)/kernel/Makefile export AFLAGS_vmlinux.lds.o += -P -C -U$(ARCH) # Single targets # --------------------------------------------------------------------------- %.s: %.c scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %.i: %.c scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %.o: %.c scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %/: scripts prepare FORCE $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) %.lst: %.c scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %.s: %.S scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ %.o: %.S scripts FORCE $(Q)$(MAKE) $(build)=$(@D) $@ # FIXME: The asm symlink changes when $(ARCH) changes. That's # hard to detect, but I suppose "make mrproper" is a good idea # before switching between archs anyway. include/asm: @echo ' SYMLINK $@ -> include/asm-$(ARCH)' $(Q)if [ ! -d include ]; then mkdir -p include; fi; @ln -fsn asm-$(ARCH) $@ # 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 $@ # Generate some files # --------------------------------------------------------------------------- # version.h changes when $(KERNELRELEASE) etc change, as defined in # this Makefile uts_len := 64 define filechk_version.h if expr length "$(KERNELRELEASE)" \> $(uts_len) >/dev/null ; then \ echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ exit 1; \ fi; \ (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ ) endef include/linux/version.h: Makefile $(call filechk,version.h) # --------------------------------------------------------------------------- .PHONY: depend dep depend dep: @echo '*** Warning: make $@ is unnecessary now.' # --------------------------------------------------------------------------- # Modules ifdef CONFIG_MODULES # By default, build modules as well all: modules # Build modules .PHONY: modules modules: $(SUBDIRS) $(if $(KBUILD_BUILTIN),vmlinux) @echo ' Building modules, stage 2.'; $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost # Install modules .PHONY: modules_install modules_install: _modinst_ _modinst_post .PHONY: _modinst_ _modinst_: @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \ echo "Warning: you may need to install module-init-tools"; \ echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ sleep 1; \ fi @rm -rf $(MODLIB)/kernel @rm -f $(MODLIB)/build @mkdir -p $(MODLIB)/kernel @ln -s $(TOPDIR) $(MODLIB)/build $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst # If System.map exists, run depmod. This deliberately does not have a # dependency on System.map since that would run the dependency tree on # vmlinux. This depmod is only for convenience to give the initial # boot a modules.dep even before / is mounted read-write. However the # boot script depmod is the master version. ifeq "$(strip $(INSTALL_MOD_PATH))" "" depmod_opts := else depmod_opts := -b $(INSTALL_MOD_PATH) -r endif .PHONY: _modinst_post _modinst_post: _modinst_ if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi else # CONFIG_MODULES # Modules not configured # --------------------------------------------------------------------------- modules modules_install: FORCE @echo @echo "The present kernel configuration has modules disabled." @echo "Type 'make config' and enable loadable module support." @echo "Then build a kernel with module support enabled." @echo @exit 1 endif # CONFIG_MODULES # Generate asm-offsets.h # --------------------------------------------------------------------------- define filechk_gen-asm-offsets (set -e; \ echo "#ifndef __ASM_OFFSETS_H__"; \ echo "#define __ASM_OFFSETS_H__"; \ echo "/*"; \ echo " * DO NOT MODIFY."; \ echo " *"; \ echo " * This file was generated by arch/$(ARCH)/Makefile"; \ echo " *"; \ echo " */"; \ echo ""; \ sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ echo ""; \ echo "#endif" ) endef ### # Cleaning is done on three levels. # make clean Delete all automatically generated files, including # tools and firmware. # make mrproper Delete the current configuration, and related files # Any core files spread around are deleted as well # make distclean Remove editor backup files, patch leftover files and the like # Files removed with 'make clean' CLEAN_FILES += vmlinux System.map MC* # Files removed with 'make mrproper' MRPROPER_FILES += \ include/linux/autoconf.h include/linux/version.h \ .version .config .config.old config.in config.old \ .menuconfig.log \ include/asm \ .hdepend include/linux/modversions.h \ tags TAGS cscope* kernel.spec \ .tmp* # Directories removed with 'make mrproper' MRPROPER_DIRS += \ $(MODVERDIR) \ .tmp_export-objs \ include/config \ include/linux/modules \ include2 # clean - Delete all intermediate files # clean-dirs += $(addprefix _clean_,$(ALL_SUBDIRS) Documentation/DocBook scripts) .PHONY: $(clean-dirs) clean archclean mrproper archmrproper distclean $(clean-dirs): $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) quiet_cmd_rmclean = RM $$(CLEAN_FILES) cmd_rmclean = rm -f $(CLEAN_FILES) clean: archclean $(clean-dirs) $(call cmd,rmclean) @find . $(RCS_FIND_IGNORE) \ \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ -type f -print | xargs rm -f # mrproper - delete configuration + modules + core files # quiet_cmd_mrproper = RM $$(MRPROPER_DIRS) + $$(MRPROPER_FILES) cmd_mrproper = rm -rf $(MRPROPER_DIRS) && rm -f $(MRPROPER_FILES) mrproper distclean: clean archmrproper @echo ' Making $@ in the srctree' @find . $(RCS_FIND_IGNORE) \ \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ -o -name '.*.rej' -o -size 0 \ -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ -type f -print | xargs rm -f $(call cmd,mrproper) # Generate tags for editors # --------------------------------------------------------------------------- define all-sources ( find . $(RCS_FIND_IGNORE) \ \( -name include -o -name arch \) -prune -o \ -name '*.[chS]' -print; \ find arch/$(ARCH) $(RCS_FIND_IGNORE) \ -name '*.[chS]' -print; \ find include $(RCS_FIND_IGNORE) \ \( -name config -o -name 'asm-*' \) -prune \ -o -name '*.[chS]' -print; \ find include/asm-$(ARCH) $(RCS_FIND_IGNORE) \ -name '*.[chS]' -print; \ find include/asm-generic $(RCS_FIND_IGNORE) \ -name '*.[chS]' -print ) endef quiet_cmd_cscope = MAKE $@ cmd_cscope = $(all-sources) | cscope -k -b -i - quiet_cmd_TAGS = MAKE $@ cmd_TAGS = $(all-sources) | etags - # Exuberant ctags works better with -I quiet_cmd_tags = MAKE $@ define cmd_tags rm -f $@; \ CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \ $(all-sources) | xargs ctags $$CTAGSF -a endef cscope: FORCE $(call cmd,cscope) TAGS: FORCE $(call cmd,TAGS) tags: FORCE $(call cmd,tags) # RPM target # --------------------------------------------------------------------------- .PHONY: rpm # Remove hyphens since they have special meaning in RPM filenames KERNELPATH=kernel-$(subst -,,$(KERNELRELEASE)) # If you do a make spec before packing the tarball you can rpm -ta it spec: $(CONFIG_SHELL) $(srctree)/scripts/mkspec > $(objtree)/kernel.spec # a) Build a tar ball # b) generate an rpm from it # c) and pack the result # - Use /. to avoid tar packing just the symlink rpm: clean spec set -e; \ cd .. ; \ ln -sf $(srctree) $(KERNELPATH) ; \ tar -cvz $(RCS_TAR_IGNORE) -f $(KERNELPATH).tar.gz $(KERNELPATH)/. ; \ rm $(KERNELPATH) set -e; \ $(CONFIG_SHELL) $(srctree)/scripts/mkversion > $(objtree)/.tmp_version;\ mv -f $(objtree)/.tmp_version $(objtree)/.version; $(RPM) --target $(UTS_MACHINE) -ta ../$(KERNELPATH).tar.gz rm ../$(KERNELPATH).tar.gz # 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 + config + various backup 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' @echo ' dir/ - Build all files in dir and below' @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) -f $(srctree)/Documentation/DocBook/Makefile dochelp @echo '' @echo 'Architecture specific targets ($(ARCH)):' @$(if $(archhelp),$(archhelp),\ echo ' No architecture specific help defined for $(ARCH)') @echo '' @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' @echo ' make O=dir [targets] Locate all output files in "dir", including .config' @echo ' make C=1 [targets] Check all c source with checker tool' @echo '' @echo 'Execute "make" or "make all" to build all targets marked with [*] ' @echo 'For further info see the ./README file' # Documentation targets # --------------------------------------------------------------------------- %docs: scripts/docproc FORCE $(Q)$(MAKE) $(build)=Documentation/DocBook $@ # Scripts to check various things for consistency # --------------------------------------------------------------------------- configcheck: find * $(RCS_FIND_IGNORE) \ -name '*.[hcS]' -type f -print | sort \ | xargs $(PERL) -w scripts/checkconfig.pl includecheck: find * $(RCS_FIND_IGNORE) \ -name '*.[hcS]' -type f -print | sort \ | xargs $(PERL) -w scripts/checkincludes.pl versioncheck: find * $(RCS_FIND_IGNORE) \ -name '*.[hcS]' -type f -print | sort \ | xargs $(PERL) -w scripts/checkversion.pl endif #ifeq ($(config-targets),1) endif #ifeq ($(mixed-targets),1) # FIXME Should go into a make.lib or something # =========================================================================== a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ $(NOSTDINC_FLAGS) $(CPPFLAGS) \ $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) quiet_cmd_as_o_S = AS $@ cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< # read all saved command lines targets := $(wildcard $(sort $(targets))) cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) ifneq ($(cmd_files),) $(cmd_files): ; # Do not try to update included dependency files include $(cmd_files) endif # execute the command and also postprocess generated .d dependencies # file if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ $(filter-out $(cmd_$(1)),$(cmd_$@))\ $(filter-out $(cmd_$@),$(cmd_$(1)))),\ @set -e; \ $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ $(cmd_$(1)); \ scripts/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \ rm -f $(depfile); \ mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd) # 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)) # filechk is used to check if the content of a generated file is updated. # Sample usage: # define filechk_sample # echo $KERNELRELEASE # endef # version.h : Makefile # $(call filechk,sample) # The rule defined shall write to stdout the content of the new file. # The existing file will be compared with the new one. # - If no file exist it is created # - If the content differ the new file is used # - If they are equal no change, and no timestamp update define filechk @set -e; \ echo ' CHK $@'; \ mkdir -p $(dir $@); \ $(filechk_$(1)) < $< > $@.tmp; \ if [ -r $@ ] && cmp -s $@ $@.tmp; then \ rm -f $@.tmp; \ else \ echo ' UPD $@'; \ mv -f $@.tmp $@; \ fi endef # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir # Usage: # $(Q)$(MAKE) $(build)=dir build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir # Usage: # $(Q)$(MAKE) $(clean)=dir clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj # $(call descend,<dir>,<target>) # Recursively call a sub-make in <dir> with target <target> # Usage is deprecated, because make does not see this as an invocation of make. descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2) endif # skip-makefile FORCE: