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Makefile | 2009-10-16 | 54.2 KB | 1,605 lines |
- VERSION = 2
- PATCHLEVEL = 6
- SUBLEVEL = 31
- EXTRAVERSION = .4
- NAME = Man-Eating Seals of Antiquity
-
- # *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
-
- # 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 precedence
- ifdef 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 line
- PHONY := _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 make
- ifeq ($(skip-makefile),)
-
- # If building an external module we do not care about the all: rule
- # but instead _all depend on modules
- PHONY += all
- ifeq ($(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.
- # Default value for CROSS_COMPILE is not to prefix executables
- # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
- export KBUILD_BUILDHOST := $(SUBARCH)
- ARCH ?= $(SUBARCH)
- 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 -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 $(CONFIG_MODVERSIONS),1)
- endif
-
- # If we have "make <whatever> modules", compile modules
- # in addition to whatever we do anyway.
- # Just "make" or "make all" shall build modules as well
-
- ifneq ($(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 src
- MAKEFLAGS += --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
- 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 = $(MODFLAGS)
- LDFLAGS_MODULE =
- CFLAGS_KERNEL =
- AFLAGS_KERNEL =
- CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
-
- # Prefer linux-backports-modules
- ifneq ($(KBUILD_SRC),)
- ifneq ($(shell if test -e $(KBUILD_OUTPUT)/ubuntu-build; then echo yes; fi),yes)
- UBUNTUINCLUDE := -I/usr/src/linux-headers-lbm-$(KERNELRELEASE)
- endif
- endif
-
- # Use LINUXINCLUDE when you must reference the include/ directory.
- # Needed to be compatible with the O= option
- LINUXINCLUDE := $(UBUNTUINCLUDE) -Iinclude \
- $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
- -I$(srctree)/arch/$(hdr-arch)/include \
- -include include/linux/autoconf.h
-
- # UBUNTU: Include our third party driver stuff too
- LINUXINCLUDE += -Iubuntu/include $(if $(KBUILD_SRC),-I$(srctree)/ubuntu/include)
-
- KBUILD_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 KERNELVERSION
- export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
- export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
- export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
-
- export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
- export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
- export 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) $(build)=scripts/basic
-
- # To avoid any implicit rule to kick in, define an empty command.
- scripts/basic/%: scripts_basic ;
-
- PHONY += outputmakefile
- # outputmakefile generates a Makefile in the output directory, if using a
- # separate output directory. This allows convenient use of make in the
- # output directory.
- outputmakefile:
- ifneq ($(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
- $(Q)$(MAKE) $(build)=$(@)
-
- # Objects we will link into vmlinux / subdirs we need to visit
- init-y := init/
- drivers-y := drivers/ sound/ firmware/ ubuntu/
- 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 files
- include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
- $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
- else
- # external modules needs include/linux/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/linux/autoconf.h -a -e $@ || ( \
- echo; \
- echo " ERROR: Kernel configuration is invalid."; \
- echo " include/linux/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 makefile
- all: 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 distributions
- ifndef 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-calls
- else
- 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 included
- NOSTDINC_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 4.0
- KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
-
- # disable invalid "can't wrap" optimizations for signed / pointers
- KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
-
- # revert to pre-gcc-4.4 behaviour of .eh_frame
- KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
-
- # 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)%,%,\
- $(call ld-option, -Wl$(comma)--build-id,))
- LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
- LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
-
- ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
- LDFLAGS_vmlinux += -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 values
- 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 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$$(cat .old_version) + 1 >.version; \
- fi; \
- $(MAKE) $(build)=init
-
- # Generate System.map
- quiet_cmd_sysmap = SYSMAP
- cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
-
- # Link of vmlinux
- # If CONFIG_KALLSYMS is set .version is already updated
- # Generate System.map and verify that the content is consistent
- # Use + in front of the vmlinux_version rule to silent warning with make -j2
- # First command is ':' to allow us to use + in front of the rule
- define rule_vmlinux__
- :
- $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
-
- $(call cmd,vmlinux__)
- $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
-
- $(Q)$(if $($(quiet)cmd_sysmap), \
- echo ' $($(quiet)cmd_sysmap) System.map' &&) \
- $(cmd_sysmap) $@ System.map; \
- if [ $$? -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 rule
- cmd_ksym_ld = $(cmd_vmlinux__)
- define rule_ksym_ld
- :
- +$(call cmd,vmlinux_version)
- $(call cmd,vmlinux__)
- $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
- endef
-
- # 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.
- $(KALLSYMS): scripts ;
-
- # Generate some data for debugging strange kallsyms problems
- debug_kallsyms: .tmp_map$(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).cmd
- endef
-
- # 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 early
- ifdef 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 language
-
- PHONY += $(vmlinux-dirs)
- $(vmlinux-dirs): prepare scripts
- $(Q)$(MAKE) $(build)=$@
-
- # Build the kernel release string
- #
- # The KERNELRELEASE value built here is stored in the file
- # include/config/kernel.release, and is used when executing several
- # make targets, such as "make install" or "make modules_install."
- #
- # The eventual kernel release string consists of the following fields,
- # shown in a hierarchical format to show how smaller parts are concatenated
- # to form the larger and final value, with values coming from places like
- # the Makefile, kernel config options, make command line options and/or
- # SCM tag information.
- #
- # $(KERNELVERSION)
- # $(VERSION) eg, 2
- # $(PATCHLEVEL) eg, 6
- # $(SUBLEVEL) eg, 18
- # $(EXTRAVERSION) eg, -rc6
- # $(localver-full)
- # $(localver)
- # localversion* (files without backups, containing '~')
- # $(CONFIG_LOCALVERSION) (from kernel config setting)
- # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
- # ./scripts/setlocalversion (SCM tag, if one exists)
- # $(LOCALVERSION) (from make command line if provided)
- #
- # Note how the final $(localver-auto) string is included *only* if the
- # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
- # moment, only git is supported but other SCMs can edit the script
- # scripts/setlocalversion and add the appropriate checks as needed.
-
- pattern = ".*/localversion[^~]*"
- string = $(shell cat /dev/null \
- `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
-
- localver = $(subst $(space),, $(string) \
- $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
-
- # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
- # and if the SCM is know a tag from the SCM is appended.
- # The appended tag is determined by the SCM used.
- #
- # .scmversion is used when generating rpm packages so we do not loose
- # the version information from the SCM when we do the build of the kernel
- # from the copied source
- ifdef CONFIG_LOCALVERSION_AUTO
-
- ifeq ($(wildcard .scmversion),)
- _localver-auto = $(shell $(CONFIG_SHELL) \
- $(srctree)/scripts/setlocalversion $(srctree))
- else
- _localver-auto = $(shell cat .scmversion 2> /dev/null)
- endif
-
- localver-auto = $(LOCALVERSION)$(_localver-auto)
- endif
-
- localver-full = $(localver)$(localver-auto)
-
- # Store (new) KERNELRELASE string in include/config/kernel.release
- kernelrelease = $(KERNELVERSION)$(localver-full)
- include/config/kernel.release: include/config/auto.conf FORCE
- $(Q)rm -f $@
- $(Q)echo $(kernelrelease) > $@
-
-
- # 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 $(srctree)
- # 2) Create the include2 directory, used for the second asm symlink
- prepare3: include/config/kernel.release
- ifneq ($(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;
- $(Q)if [ ! -d include2 ]; then \
- mkdir -p include2; \
- ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
- fi
- endif
-
- # prepare2 creates a makefile if using a separate output directory
- prepare2: prepare3 outputmakefile
-
- prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
- include/asm include/config/auto.conf
- $(cmd_crmodverdir)
-
- archprepare: prepare1 scripts_basic
-
- prepare0: archprepare FORCE
- $(Q)$(MAKE) $(build)=.
- $(Q)$(MAKE) $(build)=. missing-syscalls
-
- # All the preparing..
- prepare: prepare0
-
- # Leave this as default for preprocessing vmlinux.lds.S, which is now
- # done in arch/$(ARCH)/kernel/Makefile
-
- export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
-
- # The asm symlink changes when $(ARCH) changes.
- # Detect this and ask user to run make mrproper
- # If asm is a stale symlink (point to dir that does not exist) remove it
- define check-symlink
- set -e; \
- if [ -L include/asm ]; then \
- asmlink=`readlink include/asm | cut -d '-' -f 2`; \
- if [ "$$asmlink" != "$(SRCARCH)" ]; then \
- echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
- echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
- exit 1; \
- fi; \
- test -e $$asmlink || rm include/asm; \
- elif [ -d include/asm ]; then \
- echo "ERROR: $@ is a directory but a symlink was expected";\
- exit 1; \
- fi
- endef
-
- # We create the target directory of the symlink if it does
- # not exist so the test in check-symlink works and we have a
- # directory for generated filesas used by some architectures.
- define create-symlink
- if [ ! -L include/asm ]; then \
- $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
- if [ ! -d include/asm-$(SRCARCH) ]; then \
- mkdir -p include/asm-$(SRCARCH); \
- fi; \
- ln -fsn asm-$(SRCARCH) $@; \
- fi
- endef
-
- include/asm: FORCE
- $(Q)$(check-symlink)
- $(Q)$(create-symlink)
-
- # 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 builds
-
- uts_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/linux/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
- # Find out where the Kbuild file is located to support
- # arch/$(ARCH)/include/asm
- hdr-dir = $(strip \
- $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
- arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
-
- # 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 install
-
- PHONY += headers_install
- headers_install: __headers
- $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
- $(error Headers not exportable for the $(SRCARCH) architecture))
- $(Q)$(MAKE) $(hdr-inst)=include
- $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
-
- PHONY += headers_check_all
- headers_check_all: headers_install_all
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
-
- PHONY += headers_check
- headers_check: headers_install
- $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
- $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(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)
- $(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 $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
-
-
- # Target to prepare building external modules
- PHONY += modules_prepare
- modules_prepare: prepare scripts
-
- # Target to install modules
- PHONY += modules_install
- modules_install: _modinst_ _modinst_post
-
- PHONY += _modinst_
- _modinst_:
- @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
- echo "Warning: you may need to install module-init-tools"; \
- echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
- 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)/
- $(Q)$(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 include2 usr/include include/generated
- MRPROPER_FILES += .config .config.old include/asm .version .old_version \
- include/linux/autoconf.h include/linux/version.h \
- include/linux/utsrelease.h \
- include/linux/bounds.h include/asm*/asm-offsets.h \
- Module.symvers Module.markers 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) \
- \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
- -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
- -o -name '*.symtypes' -o -name 'modules.order' \
- -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
- -o -name '*.gcno' \) -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.[ois] - Build specified target only'
- @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.modpost
-
- PHONY += 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.modinst
-
- PHONY += _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)/Module.markers \
- $(KBUILD_EXTMOD)/modules.order
- clean: $(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 -f
-
- help:
- @echo ' Building external modules.'
- @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
- @echo ''
- @echo ' modules - default target, build the module(s)'
- @echo ' modules_install - install the module'
- @echo ' clean - remove generated files in module directory only'
- @echo ''
-
- # Dummies...
- PHONY += prepare scripts
- prepare: ;
- scripts: ;
- endif # KBUILD_EXTMOD
-
- # Generate tags for editors
- # ---------------------------------------------------------------------------
- quiet_cmd_tags = GEN $@
- cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
-
- tags TAGS cscope: FORCE
- $(call cmd,tags)
-
- # Scripts to check various things for consistency
- # ---------------------------------------------------------------------------
-
- includecheck:
- find * $(RCS_FIND_IGNORE) \
- -name '*.[hcS]' -type f -print | sort \
- | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
-
- versioncheck:
- find * $(RCS_FIND_IGNORE) \
- -name '*.[hcS]' -type f -print | sort \
- | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
-
- namespacecheck:
- $(PERL) $(srctree)/scripts/namespace.pl
-
- export_report:
- $(PERL) $(srctree)/scripts/export_report.pl
-
- endif #ifeq ($(config-targets),1)
- endif #ifeq ($(mixed-targets),1)
-
- PHONY += checkstack kernelrelease kernelversion
-
- # UML needs a little special treatment here. It wants to use the host
- # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
- # else wants $(ARCH), including people doing cross-builds, which means
- # that $(SUBARCH) doesn't work here.
- ifeq ($(ARCH), um)
- CHECKSTACK_ARCH := $(SUBARCH)
- else
- CHECKSTACK_ARCH := $(ARCH)
- endif
- checkstack:
- $(OBJDUMP) -d vmlinux $$(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 $(KERNELVERSION)
-
- # Single targets
- # ---------------------------------------------------------------------------
- # Single targets are compatible with:
- # - build with mixed source and output
- # - build with separate output dir 'make O=...'
- # - external modules
- #
- # target-dir => where to store outputfile
- # build-dir => directory in kernel source tree to use
-
- ifeq ($(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 executable
- quiet_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 obj
-
- endif # 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)
-