[工作范文]Makefile_linux-26352

[工作]Makefile_linux-26352 VERSION = 2 PATCHLEVEL = 6 SUBLEVEL = 35 EXTRAVERSION = .2 NAME = Sheep on Meth # *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: # o use make's built-in rules and variables # (this increases performance and avoids hard-to-debug behaviour);# o print "Entering directory ..."; MAKEFLAGS += -rR --no-print-directory # Avoid funny character set dependencies unexport LC_ALL LC_COLLATE=C LC_NUMERIC=C export LC_COLLATE LC_NUMERIC # We are using a recursive build, so we need to do a little thinking# to get the ordering right. # # Most importantly: sub-Makefiles should only ever modify files in# their own directory. If in some directory we have a dependency on# a file in another dir (which doesn't happen often, but it's often# unavoidable when linking the built-in.o targets which finally# turn into vmlinux), we will call a sub make in that other dir, and# after that we are sure that everything which is in that other dir# is now up to date. # # The only cases where we need to modify files which have global# effects are thus separated out and done before the recursive# descending is started. They are now explicitly listed as the# prepare rule. # To put more focus on warnings, be less verbose as default# Use 'make V=1' to see the full commands ifeq ("$(origin V)", "command line") KBUILD_VERBOSE = $(V) endif ifndef KBUILD_VERBOSE KBUILD_VERBOSE = 0 endif # Call a source code checker (by default, "sparse") as part of the# C compilation. # # Use 'make C=1' to enable checking of only re-compiled files.# Use 'make C=2' to enable checking of *all* source files, regardless# of whether they are re-compiled or not. # # See the file "Documentation/sparse.txt" for more details, including# where to get the "sparse" utility. ifeq ("$(origin C)", "command line") KBUILD_CHECKSRC = $(C) endif ifndef KBUILD_CHECKSRC KBUILD_CHECKSRC = 0 endif # Use make M=dir to specify directory of external module to build# Old syntax make ... SUBDIRS=$PWD is still supported# Setting the environment variable KBUILD_EXTMOD take precedenceifdef SUBDIRS KBUILD_EXTMOD ?= $(SUBDIRS) endif ifeq ("$(origin M)", "command line") KBUILD_EXTMOD := $(M) endif # kbuild supports saving output files in a separate directory.# To locate output files in a separate directory two syntaxes are supported.# In both cases the working directory must be the root of the kernel src.# 1) O= # Use "make O=dir/to/store/output/files/" # # 2) Set KBUILD_OUTPUT # Set the environment variable KBUILD_OUTPUT to point to the directory# where the output files shall be placed. # export KBUILD_OUTPUT=dir/to/store/output/files/ # make # # The O= assignment takes precedence over the KBUILD_OUTPUT environment# variable. # KBUILD_SRC is set on invocation of make in OBJ directory# KBUILD_SRC is not intended to be used by the regular user (for now)ifeq ($(KBUILD_SRC),) # OK, Make called in directory where kernel src resides# Do we want to locate output files in a separate directory?ifeq ("$(origin O)", "command line") KBUILD_OUTPUT := $(O) endif # That's our default target when none is given on the command linePHONY := _all _all: # Cancel implicit rules on top Makefile $(CURDIR)/Makefile Makefile: ; ifneq ($(KBUILD_OUTPUT),) # Invoke a second make in the output directory, passing relevant variables# check that the output directory actually exists saved-output := $(KBUILD_OUTPUT) KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)$(if $(KBUILD_OUTPUT),, \ $(error output directory "$(saved-output)" does not exist))PHONY += $(MAKECMDGOALS) sub-make $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make $(Q)@: sub-make: FORCE $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ KBUILD_SRC=$(CURDIR) \ KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ $(filter-out _all sub-make,$(MAKECMDGOALS)) # Leave processing to above invocation of make skip-makefile := 1 endif # ifneq ($(KBUILD_OUTPUT),) endif # ifeq ($(KBUILD_SRC),) # We process the rest of the Makefile if this is the final invocation of makeifeq ($(skip-makefile),) # If building an external module we do not care about the all: rule# but instead _all depend on modules PHONY += all ifeq ($(KBUILD_EXTMOD),) _all: all else _all: modules endif srctree:= $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) objtree:= $(CURDIR) src:= $(srctree) obj:= $(objtree) VPATH:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))export srctree objtree VPATH # SUBARCH tells the usermode build what the underlying arch is. That is set# first, and if a usermode build is happening, the "ARCH=um" on the command# line overrides the setting of ARCH below. If a native build is happening,# then ARCH is assigned, getting whatever value it gets normally, and # SUBARCH is subsequently ignored. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ -e s/arm.*/arm/ -e s/sa110/arm/ \ -e s/s390x/s390/ -e s/parisc64/parisc/ \ -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ -e s/sh[234].*/sh/ ) # Cross compiling and selecting different set of gcc/bin-utils# ---------------------------------------------------------------------------# # When performing cross compilation for other architectures ARCH shall be set# to the target architecture. (See arch/* for the possibilities).# ARCH can be set during invocation of make: # make ARCH=ia64 # Another way is to have ARCH set in the environment. # The default ARCH is the host where make is executed. # CROSS_COMPILE specify the prefix used for all executables used# during compilation. Only gcc and related bin-utils executables# are prefixed with $(CROSS_COMPILE). # CROSS_COMPILE can be set on the command line # make CROSS_COMPILE=ia64-linux- # Alternatively CROSS_COMPILE can be set in the environment.# A third alternative is to store a setting in .config so that plain# "make" in the configured kernel build directory always uses that.# Default value for CROSS_COMPILE is not to prefix executables# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefileexport KBUILD_BUILDHOST := $(SUBARCH) ARCH?= $(SUBARCH) CROSS_COMPILE?= CROSS_COMPILE?= $(CONFIG_CROSS_COMPILE:"%"=%)# Architecture as present in compile.h UTS_MACHINE := $(ARCH) SRCARCH := $(ARCH) # Additional ARCH settings for x86 ifeq ($(ARCH),i386) SRCARCH := x86 endif ifeq ($(ARCH),x86_64) SRCARCH := x86 endif # Additional ARCH settings for sparc ifeq ($(ARCH),sparc64) SRCARCH := sparc endif # Additional ARCH settings for sh ifeq ($(ARCH),sh64) SRCARCH := sh endif # Where to locate arch specific headers hdr-arch := $(SRCARCH) ifeq ($(ARCH),m68knommu) hdr-arch := m68k endif KCONFIG_CONFIG?= .config # SHELL used by kbuild CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ else if [ -x /bin/bash ]; then echo /bin/bash; \ else echo sh; fi ; fi) HOSTCC = gcc HOSTCXX = g++ HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame- pointer 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 up to date before we record them.ifeq ($(MAKECMDGOALS),modules) KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)endif #If we have "make modules", compile modules#in addition to whatever we do anyway. #Just "make" or "make all" shall build modules as wellifneq ($(filter all _all modules,$(MAKECMDGOALS)),) KBUILD_MODULES := 1 endif ifeq ($(MAKECMDGOALS),) KBUILD_MODULES := 1 endif export KBUILD_MODULES KBUILD_BUILTIN export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD # Beautify output # ---------------------------------------------------------------------------# # Normally, we echo the whole command before executing it. By making# that echo $($(quiet)$(cmd)), we now have the possibility to set# $(quiet) to choose other forms of output instead, e.g.# # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<# # If $(quiet) is empty, the whole command will be printed.# If it is set to "quiet_", only the short version will be printed. # If it is set to "silent_", nothing will be printed at all, since# the variable $(silent_cmd_cc_o_c) doesn't exist. # # A simple variant is to prefix commands with $(Q) - that's useful# for commands that shall be hidden in non-verbose mode.# #$(Q)ln $@ :< # # If KBUILD_VERBOSE equals 0 then the above command will be hidden.# If KBUILD_VERBOSE equals 1 then the above command is displayed.ifeq ($(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 export quiet Q KBUILD_VERBOSE # Look for make include files relative to root of kernel srcMAKEFLAGS += --include-dir=$(srctree) # We need some generic definitions (do not try to remake the file).$(srctree)/scripts/Kbuild.include: ; include $(srctree)/scripts/Kbuild.include # Make variables (CC, etc...) AS= $(CROSS_COMPILE)as LD= $(CROSS_COMPILE)ld CC= $(CROSS_COMPILE)gcc CPP= $(CC) -E AR= $(CROSS_COMPILE)ar NM= $(CROSS_COMPILE)nm STRIP= $(CROSS_COMPILE)strip OBJCOPY= $(CROSS_COMPILE)objcopy OBJDUMP= $(CROSS_COMPILE)objdump AWK= awk GENKSYMS= scripts/genksyms/genksyms INSTALLKERNEL := installkernel DEPMOD= /sbin/depmod KALLSYMS= scripts/kallsyms PERL= perl CHECK= sparse CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ -Wbitwise -Wno-return-void $(CF) MODFLAGS= -DMODULE CFLAGS_MODULE = $(MODFLAGS) AFLAGS_MODULE = $(MODFLAGS) LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.ldsCFLAGS_KERNEL= AFLAGS_KERNEL= CFLAGS_GCOV= -fprofile-arcs -ftest-coverage # Use LINUXINCLUDE when you must reference the include/ directory.# Needed to be compatible with the O= option LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \ $(if $(KBUILD_SRC), -I$(srctree)/include) \ -include include/generated/autoconf.hKBUILD_CPPFLAGS := -D__KERNEL__ KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -fno-common \ -Werror-implicit-function-declaration \ -Wno-format-security \ -fno-delete-null-pointer-checks KBUILD_AFLAGS := -D__ASSEMBLY__ # Read KERNELRELEASE from include/config/kernel.release (if it exists)KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSIONexport ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CCexport CPP AR NM STRIP OBJCOPY OBJDUMP export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINEexport HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGSexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGSexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOVexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE # When compiling out-of-tree modules, put MODVERDIR in the module# tree rather than in the kernel tree. The kernel tree might# even be read-only. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions # Files to ignore in find ... statements RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git# ===========================================================================# Rules shared between *config targets and build targets# Basic helpers built in scripts/ PHONY += scripts_basic scripts_basic: $(Q)$(MAKE) $(build)=scripts/basic $(Q)rm -f .tmp_quiet_recordmcount # To avoid any implicit rule to kick in, define an empty command.scripts/basic/%: scripts_basic ; PHONY += outputmakefile # outputmakefile generates a Makefile in the output directory, if using a# separate output directory. This allows convenient use of make in the# output directory. outputmakefile: ifneq ($(KBUILD_SRC),) $(Q)ln -fsn $(srctree) source $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) endif # To make sure we do not include .config for any of the *config targets# catch them early, and hand them over to scripts/kconfig/Makefile# It is allowed to specify more targets when calling make, including# mixing *config targets and build targets. # For example 'make oldconfig all'. # Detect when mixed targets is specified, and make a second invocation# of make so .config is not included in this case either (for *config).no-dot-config-targets := clean mrproper distclean \ cscope TAGS tags help %docs check% \ include/linux/version.h headers_% \ kernelrelease kernelversion config-targets := 0 mixed-targets := 0 dot-config := 1 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) dot-config := 0 endif endif ifeq ($(KBUILD_EXTMOD),) ifneq ($(filter config %config,$(MAKECMDGOALS)),) config-targets := 1 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) mixed-targets := 1 endif endif endif ifeq ($(mixed-targets),1) # ===========================================================================# We're called with mixed targets (*config and build targets).# Handle them one by one. %:: 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 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.# KBUILD_DEFCONFIG may point out an alternative default configuration# used for 'make defconfig' include $(srctree)/arch/$(SRCARCH)/Makefile export KBUILD_DEFCONFIG KBUILD_KCONFIG config: scripts_basic outputmakefile FORCE $(Q)mkdir -p include/linux include/config $(Q)$(MAKE) $(build)=scripts/kconfig $@ %config: scripts_basic outputmakefile FORCE $(Q)mkdir -p include/linux include/config $(Q)$(MAKE) $(build)=scripts/kconfig $@ else # ===========================================================================# Build targets only - this includes vmlinux, arch specific targets, clean# targets and others. In general all targets except *config targets.ifeq ($(KBUILD_EXTMOD),) # Additional helpers built in scripts/ # Carefully list dependencies so we do not try to build scripts twice# in parallel PHONY += scripts scripts: scripts_basic include/config/auto.conf include/config/tristate.conf $(Q)$(MAKE) $(build)=$(@) # Objects we will link into vmlinux / subdirs we need to visitinit-y:= init/ drivers-y:= drivers/ sound/ firmware/ net-y:= net/ libs-y:= lib/ core-y:= usr/ endif # KBUILD_EXTMOD ifeq ($(dot-config),1) # Read in config -include include/config/auto.conf ifeq ($(KBUILD_EXTMOD),) # Read in dependencies to all Kconfig* files, make sure to run# oldconfig if changes are detected. -include include/config/auto.conf.cmd # To avoid any implicit rule to kick in, define an empty command$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; # If .config is newer than include/config/auto.conf, someone tinkered# with it and forgot to run make oldconfig. # if auto.conf.cmd is missing then we are probably in a cleaned tree so# we execute the config step to be sure to catch updated Kconfig filesinclude/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig else # external modules needs include/generated/autoconf.h and include/config/auto.conf # but do not care if they are up-to-date. Use auto.conf to trigger the test PHONY += include/config/auto.conf include/config/auto.conf: $(Q)test -e include/generated/autoconf.h -a -e $@ || (\ echo;\ echo " ERROR: Kernel configuration is invalid.";\ echo " include/generated/autoconf.h or $@ are missing.";\ echo " Run 'make oldconfig && make prepare' on kernel src to fix it.";\ echo;\ /bin/false) endif # KBUILD_EXTMOD else # Dummy target needed, because used as prerequisite include/config/auto.conf: ; endif # $(dot-config) # The all: target is the default when no target is given on the# command line. # This allow a user to issue only 'make' to build a kernel including modules# Defaults vmlinux but it is usually overridden in the arch makefileall: vmlinux ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE KBUILD_CFLAGS+= -Os else KBUILD_CFLAGS+= -O2 endif include $(srctree)/arch/$(SRCARCH)/Makefile ifneq ($(CONFIG_FRAME_WARN),0) KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})endif # Force gcc to behave correct even for buggy distributionsifndef CONFIG_CC_STACKPROTECTOR KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)endif ifdef CONFIG_FRAME_POINTER KBUILD_CFLAGS+= -fno-omit-frame-pointer -fno-optimize-sibling-callselse KBUILD_CFLAGS+= -fomit-frame-pointer endif ifdef CONFIG_DEBUG_INFO KBUILD_CFLAGS+= -g KBUILD_AFLAGS+= -gdwarf-2 endif ifdef CONFIG_FUNCTION_TRACER KBUILD_CFLAGS+= -pg endif # We trigger additional mismatches with less inlining ifdef CONFIG_DEBUG_SECTION_MISMATCH KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)endif # arch Makefile may override CC so keep this after arch Makefile is includedNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) CHECKFLAGS += $(NOSTDINC_FLAGS) # warn about C99 declaration after statement KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)# disable pointer signed / unsigned warnings in gcc 4.0KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)# disable invalid "can't wrap" optimizations for signed / pointersKBUILD_CFLAGS+= $(call cc-option,-fno-strict-overflow)# conserve stack if available KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments# But warn user when we do so warn-assign = \ $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") ifneq ($(KCPPFLAGS),) $(call warn-assign,CPPFLAGS) KBUILD_CPPFLAGS += $(KCPPFLAGS) endif ifneq ($(KAFLAGS),) $(call warn-assign,AFLAGS) KBUILD_AFLAGS += $(KAFLAGS) endif ifneq ($(KCFLAGS),) $(call warn-assign,CFLAGS) KBUILD_CFLAGS += $(KCFLAGS) endif # Use --build-id when available. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ $(call cc-ldoption, -Wl$(comma)--build-id,))LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) ifeq ($(CONFIG_STRIP_ASM_SYMS),y) LDFLAGS_vmlinux+= $(call ld-option, -X,) endif # Default kernel image to build when no specific target is given.# KBUILD_IMAGE may be overruled on the command line or# set in the environment # Also any assignments in arch/$(ARCH)/Makefile take precedence over# this default value export KBUILD_IMAGE ?= vmlinux # # INSTALL_PATH specifies where to place the updated kernel and system map# images. Default is /boot, but you can set it to other valuesexportINSTALL_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 argument can be passed to make if needed.# MODLIB= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)export MODLIB # # INSTALL_MOD_STRIP, if defined, will cause modules to be# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then# the default option --strip-debug will be used. Otherwise,# INSTALL_MOD_STRIP will used as the options to the strip command.ifdef INSTALL_MOD_STRIP ifeq ($(INSTALL_MOD_STRIP),1) mod_strip_cmd = $(STRIP) --strip-debug else mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) endif # INSTALL_MOD_STRIP=1 else mod_strip_cmd = true endif # INSTALL_MOD_STRIP export mod_strip_cmd ifeq ($(KBUILD_EXTMOD),) core-y+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/ vmlinux-dirs:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ $(net-y) $(net-m) $(libs-y) $(libs-m))) vmlinux-alldirs:= $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ $(init-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) # Build vmlinux # ---------------------------------------------------------------------------# vmlinux is built from the objects selected by $(vmlinux-init) and# $(vmlinux-main). Most are built-in.o files from top-level directories# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.# Ordering when linking is important, and $(vmlinux-init) must be first.# # vmlinux # ^ # | # +-< $(vmlinux-init) # | +--< init/version.o + more # | # +--< $(vmlinux-main) # | +--< driver/built-in.o mm/built-in.o + more # | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)# # vmlinux version (uname -v) cannot be updated during normal# descending-into-subdirs phase since we do not yet know if we need to# update vmlinux. # Therefore this step is delayed until just before final link of vmlinux -# except in the kallsyms case where it is done just before adding the# symbols to the kernel. # # System.map is generated to document addresses of all kernel symbols vmlinux-init := $(head-y) $(init-y) vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)vmlinux-all := $(vmlinux-init) $(vmlinux-main) vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds export KBUILD_VMLINUX_OBJS := $(vmlinux-all) # Rule to link vmlinux - also used during CONFIG_KALLSYMS# May be overridden by arch/$(ARCH)/Makefile quiet_cmd_vmlinux__ ?= LD $@ cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ -T $(vmlinux-lds) $(vmlinux-init) \ --start-group $(vmlinux-main) --end-group \ $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) # Generate new vmlinux version quiet_cmd_vmlinux_version = GEN .version cmd_vmlinux_version = set -e; \ if [ ! -r .version ]; then\ rm -f .version;\ echo 1 >.version;\ else\ mv .version .old_version;\ expr 0$$(cat .old_version) + 1 >.version;\ fi;\ $(MAKE) $(build)=init # Generate System.map quiet_cmd_sysmap = SYSMAP cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap# Link of vmlinux # If CONFIG_KALLSYMS is set .version is already updated # Generate System.map and verify that the content is consistent# Use + in front of the vmlinux_version rule to silent warning with make -j2# First command is ':' to allow us to use + in front of the ruledefine rule_vmlinux__ : $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) $(call cmd,vmlinux__) $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd $(Q)$(if $($(quiet)cmd_sysmap), \ echo ' $($(quiet)cmd_sysmap) System.map' &&) \ $(cmd_sysmap) $@ System.map; \ if [ $$? -ne 0 ]; then \ rm -f $@; \ /bin/false; \ fi; $(verify_kallsyms) endef ifdef CONFIG_KALLSYMS # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)# It's a three stage process: # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is# empty # Running kallsyms on that gives us .tmp_kallsyms1.o with# the right size - vmlinux version (uname -v) is updated during this step# o .tmp_vmlinux2 now has a __kallsyms section of the right size,# but due to the added section, some addresses have shifted. # From here, we generate a correct .tmp_kallsyms2.o # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.# o Verify that the System.map from vmlinux matches the map from# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a# temporary bypass to allow the kernel to be built while the# maintainers work out what went wrong with kallsyms.ifdef CONFIG_KALLSYMS_EXTRA_PASS last_kallsyms := 3 else last_kallsyms := 2 endif kallsyms.o := .tmp_kallsyms$(last_kallsyms).o define verify_kallsyms $(Q)$(if $($(quiet)cmd_sysmap), \ echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map $(Q)cmp -s System.map .tmp_System.map || \ (echo Inconsistent kallsyms data; \ echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ rm .tmp_kallsyms* ; /bin/false ) endef # Update vmlinux version before link # Use + in front of this rule to silent warning about make -j1# First command is ':' to allow us to use + in front of this rulecmd_ksym_ld = $(cmd_vmlinux__) define rule_ksym_ld : +$(call cmd,vmlinux_version) $(call cmd,vmlinux__) $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmdendef # Generate .S file with all kernel symbols quiet_cmd_kallsyms = KSYM $@ cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE $(call if_changed_dep,as_o_S) .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) $(call cmd,kallsyms) # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE $(call if_changed_rule,ksym_ld) .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE $(call if_changed,vmlinux__) .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE $(call if_changed,vmlinux__) # Needs to visit scripts/ before $(KALLSYMS) can be used.$(KALLSYMS): scripts ; # Generate some data for debugging strange kallsyms problemsdebug_kallsyms: .tmp_map$(last_kallsyms) .tmp_map%: .tmp_vmlinux% FORCE ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ .tmp_map3: .tmp_map2 .tmp_map2: .tmp_map1 endif # ifdef CONFIG_KALLSYMS # Do modpost on a prelinked vmlinux. The finally linked vmlinux has# relevant sections renamed as per the linker script. quiet_cmd_vmlinux-modpost = LD $@ cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)define rule_vmlinux-modpost : +$(call cmd,vmlinux-modpost) $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmdendef # vmlinux image - including updated kernel symbols vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE ifdef CONFIG_HEADERS_CHECK $(Q)$(MAKE) -f $(srctree)/Makefile headers_check endif ifdef CONFIG_SAMPLES $(Q)$(MAKE) $(build)=samples endif ifdef CONFIG_BUILD_DOCSRC $(Q)$(MAKE) $(build)=Documentation endif $(call vmlinux-modpost) $(call if_changed_rule,vmlinux__) $(Q)rm -f .old_version # build vmlinux.o first to catch section mismatch errors earlyifdef CONFIG_KALLSYMS .tmp_vmlinux1: vmlinux.o endif modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE $(call if_changed_rule,vmlinux-modpost) # The actual objects are generated when descending, # make sure no implicit rule kicks in $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;# Handle descending into subdirectories listed in $(vmlinux-dirs)# Preset locale variables to speed up the build process. Limit locale# tweaks to this spot to avoid wrong language settings when running# make menuconfig etc. # Error messages still appears in the original languagePHONY += $(vmlinux-dirs) $(vmlinux-dirs): prepare scripts $(Q)$(MAKE) $(build)=$@ # Store (new) KERNELRELASE string in include/config/kernel.release include/config/kernel.release: include/config/auto.conf FORCE $(Q)rm -f $@ $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $ (srctree)/scripts/setlocalversion $(srctree))" > $@ # Things we need to do before we recursively start building the kernel# or the modules are listed in "prepare". # A multi level approach is used. prepareN is processed before prepareN-1.# archprepare is used in arch Makefiles and when processed asm symlink,# version.h and scripts_basic is processed / created. # Listed in dependency order PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3# prepare3 is used to check if we are building in a separate output directory,# and if so do: # 1) Check that make has not been executed in the kernel src $(srctree)prepare3: include/config/kernel.release ifneq ($(KBUILD_SRC),) @$(kecho) ' Using $(srctree) as source for kernel' $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ echo " $(srctree) is not clean, please run 'make mrproper'";\ echo " in the '$(srctree)' directory.";\ /bin/false; \ fi; endif # prepare2 creates a makefile if using a separate output directoryprepare2: prepare3 outputmakefile prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ include/config/auto.conf $(cmd_crmodverdir) archprepare: prepare1 scripts_basic prepare0: archprepare FORCE $(Q)$(MAKE) $(build)=. $(Q)$(MAKE) $(build)=. missing-syscalls # All the preparing.. prepare: prepare0 # Generate some files # ---------------------------------------------------------------------------# KERNELRELEASE can change from a few different places, meaning version.h# needs to be updated, so this check is forced on all buildsuts_len := 64 define filechk_utsrelease.h if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ exit 1; \ fi; \ (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) endef define filechk_version.h (echo \#define LINUX_VERSION_CODE $(shell \ expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)endef include/linux/version.h: $(srctree)/Makefile FORCE $(call filechk,version.h) include/generated/utsrelease.h: include/config/kernel.release FORCE $(call filechk,utsrelease.h) PHONY += headerdep headerdep: $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl# ---------------------------------------------------------------------------PHONY += depend dep depend dep: @echo '*** Warning: make $@ is unnecessary now.' # ---------------------------------------------------------------------------# Firmware install INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware export INSTALL_FW_PATH PHONY += firmware_install firmware_install: FORCE @mkdir -p $(objtree)/firmware $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install # ---------------------------------------------------------------------------# Kernel headers #Default location for installed headers export INSTALL_HDR_PATH = $(objtree)/usr hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj# If we do an all arch process set dst to asm-$(hdr-arch)hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)PHONY += __headers __headers: include/linux/version.h scripts_basic FORCE $(Q)$(MAKE) $(build)=scripts scripts/unifdef PHONY += headers_install_all headers_install_all: $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh installPHONY += headers_install headers_install: __headers $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ $(error Headers not exportable for the $(SRCARCH) architecture)) $(Q)$(MAKE) $(hdr-inst)=include $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)PHONY += headers_check_all headers_check_all: headers_install_all $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh checkPHONY += headers_check headers_check: headers_install $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1# --------------------------------------------------------------------------- # Modules ifdef CONFIG_MODULES # By default, build modules as well all: modules #Build modules # #A module can be listed more than once in obj-m resulting in#duplicate lines in modules.order files. Those are removed#using awk while concatenating to the final file.PHONY += modules modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $ (objtree)/modules.order @$(kecho) ' Building modules, stage 2.'; $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin%/modules.builtin: include/config/auto.conf $(Q)$(MAKE) $(modbuiltin)=$* # Target to prepare building external modules PHONY += modules_prepare modules_prepare: prepare scripts # Target to install modules PHONY += modules_install modules_install: _modinst_ _modinst_post PHONY += _modinst_ _modinst_: @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ echo "Warning: you may need to install module-init-tools"; \ echo "See ;;\ sleep 1; \ fi @rm -rf $(MODLIB)/kernel @rm -f $(MODLIB)/source @mkdir -p $(MODLIB)/kernel @ln -s $(srctree) $(MODLIB)/source @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ rm -f $(MODLIB)/build ; \ ln -s $(objtree) $(MODLIB)/build ; \ fi @cp -f $(objtree)/modules.order $(MODLIB)/ @cp -f $(objtree)/modules.builtin $(MODLIB)/ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst# This depmod is only for convenience to give the initial# boot a modules.dep even before / is mounted read-write. However the# boot script depmod is the master version. PHONY += _modinst_post _modinst_post: _modinst_ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst $(call cmd,depmod) 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 ### # Cleaning is done on three levels. # make clean Delete most generated files # Leave enough to build external modules# make mrproper Delete the current configuration, and all generated files# make distclean Remove editor backup files, patch leftover files and the like# Directories & files removed with 'make clean' CLEAN_DIRS += $(MODVERDIR) CLEAN_FILES +=vmlinux System.map \ .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map# Directories & files removed with 'make mrproper' MRPROPER_DIRS += include/config usr/include include/generatedMRPROPER_FILES += .config .config.old .version .old_version \ include/linux/version.h \ Module.symvers tags TAGS cscope* # clean - Delete most, but leave enough to build external modules# clean: rm-dirs := $(CLEAN_DIRS) clean: rm-files := $(CLEAN_FILES) clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) PHONY += $(clean-dirs) clean archclean $(clean-dirs): $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) clean: archclean $(clean-dirs) $(call cmd,rmdirs) $(call cmd,rmfiles) @find . $(RCS_FIND_IGNORE) \ \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ -o -name '*.symtypes' -o -name 'modules.order' \ -o -name modules.builtin -o -name '.tmp_*.o.*' \ -o -name '*.gcno' \) -type f -print | xargs rm -f# mrproper - Delete all generated files, including .config# mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)PHONY += $(mrproper-dirs) mrproper archmrproper $(mrproper-dirs): $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) mrproper: clean archmrproper $(mrproper-dirs) $(call cmd,rmdirs) $(call cmd,rmfiles) # distclean # PHONY += distclean distclean: mrproper @find $(srctree) $(RCS_FIND_IGNORE) \ \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ -o -name '.*.rej' -o -size 0 \ -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ -type f -print | xargs rm -f # Packaging of the kernel to various formats # ---------------------------------------------------------------------------# rpm target kept for backward compatibility package-dir:= $(srctree)/scripts/package %pkg: include/config/kernel.release FORCE $(Q)$(MAKE) $(build)=$(package-dir) $@ rpm: include/config/kernel.release FORCE $(Q)$(MAKE) $(build)=$(package-dir) $@ # Brief documentation of the typical targets used # ---------------------------------------------------------------------------boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)boards := $(notdir $(boards)) board-dirs := $(dir $(wildcard $(srctree)/arch/$ (SRCARCH)/configs/*/*_defconfig)) board-dirs := $(sort $(notdir $(board-dirs:/=))) help: @echo 'Cleaning targets:' @echo ' clean - Remove most generated files but keep the config and' @echo ' enough build support to build external modules' @echo ' mrproper - Remove all generated files + config + various backup files' @echo ' distclean - mrproper + remove editor backup and patch files' @echo '' @echo 'Configuration targets:' @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help @echo '' @echo 'Other generic targets:' @echo ' all - Build all targets marked with [*]' @echo '* vmlinux - Build the bare kernel' @echo '* modules - Build all modules' @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' @echo ' dir/ - Build all files in dir and below' @echo ' dir/file.[oisS] - Build specified target only' @echo ' dir/file.lst - Build specified mixed source/assembly target only' @echo ' (requires a recent binutils and recent build (System.map))' @echo ' dir/file.ko - Build module including final link' @echo ' modules_prepare - Set up for building external modules' @echo ' tags/TAGS - Generate tags file for editors' @echo ' cscope - Generate cscope index' @echo ' kernelrelease - Output the release version string' @echo ' kernelversion - Output the version stored in Makefile' @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ echo ' (default: $(INSTALL_HDR_PATH))'; \ echo '' @echo 'Static analysers' @echo ' checkstack - Generate a list of stack hogs' @echo ' namespacecheck - Name space analysis on compiled kernel' @echo ' versioncheck - Sanity check on version.h usage' @echo ' includecheck - Check for duplicate included header files' @echo ' export_report - List the usages of all exported symbols' @echo ' headers_check - Sanity check on exported headers' @echo ' headerdep - Detect inclusion cycles in headers'; \ echo '' @echo 'Kernel packaging:' @$(MAKE) $(build)=$(package-dir) help @echo '' @echo 'Documentation targets:' @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp @echo '' @echo 'Architecture specific targets ($(SRCARCH)):' @$(if $(archhelp),$(archhelp),\ echo ' No architecture specific help defined for $(SRCARCH)') @echo '' @$(if $(boards), \ $(foreach b, $(boards), \ printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ echo '') @$(if $(board-dirs), \ $(foreach b, $(board-dirs), \ printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ printf " %-16s - Show all of the above\\n" help-boards; \ echo '') @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' @echo ' make V=2 [targets] 2 => give reason for rebuild of target' @echo ' make O=dir [targets] Locate all output files in "dir", including .config' @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' @echo ' make C=2 [targets] Force check of all c source with $$CHECK' @echo '' @echo 'Execute "make" or "make all" to build all targets marked with [*] ' @echo 'For further info see the ./README file' help-board-dirs := $(addprefix help-,$(board-dirs)) help-boards: $(help-board-dirs) boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) $(help-board-dirs): help-%: @echo 'Architecture specific targets ($(SRCARCH) $*):' @$(if $(boards-per-dir), \ $(foreach b, $(boards-per-dir), \ printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ echo '') # Documentation targets # ---------------------------------------------------------------------------%docs: scripts_basic FORCE $(Q)$(MAKE) $(build)=Documentation/DocBook $@ else # KBUILD_EXTMOD ### # External module support. # When building external modules the kernel used as basis is considered# read-only, and no consistency checks are made and the make# system is not used on the basis kernel. If updates are required# in the basis kernel ordinary make commands (without M=...) must# be used. # # The following are the only valid targets when building external# modules. # make M=dir clean Delete all automatically generated files# make M=dir modules Make all modules in specified dir# make M=dir Same as 'make M=dir modules' # make M=dir modules_install # Install the modules built in the module directory# Assumes install directory is already created# We are always building modules KBUILD_MODULES := 1 PHONY += crmodverdir crmodverdir: $(cmd_crmodverdir) PHONY += $(objtree)/Module.symvers $(objtree)/Module.symvers: @test -e $(objtree)/Module.symvers || ( \ echo; \ echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ echo " is missing; modules will have no dependencies and modversions."; \ echo ) module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))PHONY += $(module-dirs) modules $(module-dirs): crmodverdir $(objtree)/Module.symvers $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) modules: $(module-dirs) @$(kecho) ' Building modules, stage 2.'; $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpostPHONY += modules_install modules_install: _emodinst_ _emodinst_post install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)PHONY += _emodinst_ _emodinst_: $(Q)mkdir -p $(MODLIB)/$(install-dir) $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinstPHONY += _emodinst_post _emodinst_post: _emodinst_ $(call cmd,depmod) clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))PHONY += $(clean-dirs) clean $(clean-dirs): $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)clean:rm-dirs := $(MODVERDIR) clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ $(KBUILD_EXTMOD)/modules.order \ $(KBUILD_EXTMOD)/modules.builtinclean: $(clean-dirs) $(call cmd,rmdirs) $(call cmd,rmfiles) @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ -o -name '*.gcno' \) -type f -print | xargs rm -fhelp: @echo ' Building external modules.' @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' @echo '' @echo ' modules - default target, build the module(s)' @echo ' modules_install - install the module' @echo ' clean - remove generated files in module directory only' @echo '' # Dummies... PHONY += prepare scripts prepare: ; scripts: ; endif # KBUILD_EXTMOD # Generate tags for editors # --------------------------------------------------------------------------- quiet_cmd_tags = GEN $@ cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@tags TAGS cscope: FORCE $(call cmd,tags) # Scripts to check various things for consistency# --------------------------------------------------------------------------- includecheck: find * $(RCS_FIND_IGNORE) \ -name '*.[hcS]' -type f -print | sort \ | xargs $(PERL) -w $(srctree)/scripts/checkincludes.plversioncheck: find * $(RCS_FIND_IGNORE) \ -name '*.[hcS]' -type f -print | sort \ | xargs $(PERL) -w $(srctree)/scripts/checkversion.plnamespacecheck: $(PERL) $(srctree)/scripts/namespace.pl export_report: $(PERL) $(srctree)/scripts/export_report.pl endif #ifeq ($(config-targets),1) endif #ifeq ($(mixed-targets),1) PHONY += checkstack kernelrelease kernelversion # UML needs a little special treatment here. It wants to use the host# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone# else wants $(ARCH), including people doing cross-builds, which means# that $(SUBARCH) doesn't work here. ifeq ($(ARCH), um) CHECKSTACK_ARCH := $(SUBARCH) else CHECKSTACK_ARCH := $(ARCH) endif checkstack: $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)kernelrelease: $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ $(error kernelrelease not valid - run 'make prepare' to update it))kernelversion: @echo $(KERNELVERSION) # Single targets # --------------------------------------------------------------------------- # Single targets are compatible with: # - build with mixed source and output # - build with separate output dir 'make O=...' # - external modules # # target-dir => where to store outputfile # build-dir => directory in kernel source tree to useifeq ($(KBUILD_EXTMOD),) build-dir = $(patsubst %/,%,$(dir $@)) target-dir = $(dir $@) else zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))endif %.s: %.c prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)%.i: %.c prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)%.o: %.c prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)%.lst: %.c prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)%.s: %.S prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)%.o: %.S prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)%.symtypes: %.c prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)# Modules /: prepare scripts FORCE $(cmd_crmodverdir) $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ $(build)=$(build-dir) %/: prepare scripts FORCE $(cmd_crmodverdir) $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ $(build)=$(build-dir) %.ko: prepare scripts FORCE $(cmd_crmodverdir) $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ $(build)=$(build-dir) $(@:.ko=.o) $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost # FIXME Should go into a make.lib or something # ===========================================================================quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) cmd_rmdirs = rm -rf $(rm-dirs) quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) cmd_rmfiles = rm -f $(rm-files) # Run depmod only if we have System.map and depmod is executablequiet_cmd_depmod = DEPMOD $(KERNELRELEASE) cmd_depmod = \ if [ -r System.map -a -x $(DEPMOD) ]; then \ $(DEPMOD) -ae -F System.map \ $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ $(KERNELRELEASE); \ fi # Create temporary dir for module support files # clean it up only when building all modules cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).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 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir# Usage: # $(Q)$(MAKE) $(clean)=dir clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean objendif# skip-makefile PHONY += FORCE FORCE: # Declare the contents of the .PHONY variable as phony. We keep that# information in a variable so we can use it in if_changed and friends..PHONY: $(PHONY) #