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| VERSION = 3 | |
| PATCHLEVEL = 4 | |
| SUBLEVEL = 0 | |
| EXTRAVERSION = | |
| NAME = Saber-toothed Squirrel | |
| # *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 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 := $(O) | |
| endif | |
| ifeq ("$(origin W)", "command line") | |
| export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) | |
| 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. | |
| # 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/*/Makefile | |
| export KBUILD_BUILDHOST := $(SUBARCH) | |
| ARCH ?= $(SUBARCH) | |
| 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),sparc32) | |
| SRCARCH := sparc | |
| endif | |
| ifeq ($(ARCH),sparc64) | |
| SRCARCH := sparc | |
| endif | |
| # Additional ARCH settings for sh | |
| ifeq ($(ARCH),sh64) | |
| SRCARCH := sh | |
| endif | |
| # Additional ARCH settings for tile | |
| ifeq ($(ARCH),tilepro) | |
| SRCARCH := tile | |
| endif | |
| ifeq ($(ARCH),tilegx) | |
| SRCARCH := tile | |
| endif | |
| # Where to locate arch specific headers | |
| hdr-arch := $(SRCARCH) | |
| ifeq ($(ARCH),m68knommu) | |
| hdr-arch := m68k | |
| endif | |
| KCONFIG_CONFIG ?= .config | |
| export KCONFIG_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 $(CONFIG_MODVERSIONS),1) | |
| endif | |
| # If we have "make <whatever> modules", compile modules | |
| # in addition to whatever we do anyway. | |
| # Just "make" or "make all" shall build modules as well | |
| ifneq ($(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 ($(filter s% -s%,$(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 | |
| REAL_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 | |
| # Use the wrapper for the compiler. This wrapper scans for new | |
| # warnings and causes the build to stop upon encountering them. | |
| CC = $(srctree)/scripts/gcc-wrapper.py $(REAL_CC) | |
| CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
| -Wbitwise -Wno-return-void $(CF) | |
| CFLAGS_MODULE = | |
| AFLAGS_MODULE = | |
| LDFLAGS_MODULE = | |
| CFLAGS_KERNEL = | |
| AFLAGS_KERNEL = | |
| CFLAGS_GCOV = -fprofile-arcs -ftest-coverage | |
| # Use LINUXINCLUDE when you must reference the include/ directory. | |
| # Needed to be compatible with the O= option | |
| LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include \ | |
| -Iarch/$(hdr-arch)/include/generated -Iinclude \ | |
| $(if $(KBUILD_SRC), -I$(srctree)/include) \ | |
| -include $(srctree)/include/linux/kconfig.h | |
| 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_KERNEL := | |
| KBUILD_CFLAGS_KERNEL := | |
| KBUILD_AFLAGS := -D__ASSEMBLY__ | |
| KBUILD_AFLAGS_MODULE := -DMODULE | |
| KBUILD_CFLAGS_MODULE := -DMODULE | |
| KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
| # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
| KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
| KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(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 | |
| export MAKE AWK GENKSYMS INSTALLKERNEL 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 | |
| export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE | |
| export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL | |
| export KBUILD_ARFLAGS | |
| # 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 | |
| # Support for using generic headers in asm-generic | |
| PHONY += asm-generic | |
| asm-generic: | |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ | |
| obj=arch/$(SRCARCH)/include/generated/asm | |
| # 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 gtags TAGS tags help %docs check% coccicheck \ | |
| include/linux/version.h headers_% archheaders archscripts \ | |
| kernelversion %src-pkg | |
| 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 visit | |
| init-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 files | |
| include/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 to vmlinux, but the arch makefile usually adds further targets | |
| all: vmlinux | |
| ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
| KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) | |
| 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 | |
| # This warning generated too much noise in a regular build. | |
| # Use make W=1 to enable this warning (see scripts/Makefile.build) | |
| KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) | |
| ifdef CONFIG_FRAME_POINTER | |
| KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
| else | |
| # Some targets (ARM with Thumb2, for example), can't be built with frame | |
| # pointers. For those, we don't have FUNCTION_TRACER automatically | |
| # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
| # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
| # -fomit-frame-pointer with FUNCTION_TRACER. | |
| ifndef CONFIG_FUNCTION_TRACER | |
| KBUILD_CFLAGS += -fomit-frame-pointer | |
| endif | |
| endif | |
| ifdef CONFIG_DEBUG_INFO | |
| KBUILD_CFLAGS += -g | |
| KBUILD_AFLAGS += -gdwarf-2 | |
| endif | |
| ifdef CONFIG_DEBUG_INFO_REDUCED | |
| KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) | |
| endif | |
| ifdef CONFIG_FUNCTION_TRACER | |
| KBUILD_CFLAGS += -pg | |
| ifdef CONFIG_DYNAMIC_FTRACE | |
| ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
| BUILD_C_RECORDMCOUNT := y | |
| export BUILD_C_RECORDMCOUNT | |
| endif | |
| endif | |
| 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-disable-warning, pointer-sign) | |
| # disable invalid "can't wrap" optimizations for signed / pointers | |
| KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) | |
| # conserve stack if available | |
| KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
| # use the deterministic mode of AR if available | |
| KBUILD_ARFLAGS := $(call ar-option,D) | |
| # check for 'asm goto' | |
| ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) | |
| KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO | |
| endif | |
| # 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,)) | |
| KBUILD_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 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 value will be 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 $(kallsyms.o) | |
| # It's a three stage process: | |
| # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is | |
| # empty | |
| # Running kallsyms on that gives us .tmp_kallsyms1.o with | |
| # the right size - vmlinux version (uname -v) is updated during this step | |
| # o .tmp_vmlinux2 now has a __kallsyms section of the right size, | |
| # but due to the added section, some addresses have shifted. | |
| # From here, we generate a correct .tmp_kallsyms2.o | |
| # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. | |
| # o Verify that the System.map from vmlinux matches the map from | |
| # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. | |
| # o If 'make KALLSYMS_EXTRA_PASS=1" was used, do an extra pass using | |
| # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a | |
| # temporary bypass to allow the kernel to be built while the | |
| # maintainers work out what went wrong with kallsyms. | |
| last_kallsyms := 2 | |
| ifdef KALLSYMS_EXTRA_PASS | |
| ifneq ($(KALLSYMS_EXTRA_PASS),0) | |
| last_kallsyms := 3 | |
| endif | |
| 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 This is a bug - please report about it; \ | |
| echo Try "make KALLSYMS_EXTRA_PASS=1" as a workaround; \ | |
| 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 $< | $(KALLSYMS) \ | |
| --page-offset=$(CONFIG_PAGE_OFFSET) \ | |
| $(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) $(build)=$@ | |
| # 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 directory | |
| prepare2: prepare3 outputmakefile asm-generic | |
| prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ | |
| include/config/auto.conf | |
| $(cmd_crmodverdir) | |
| archprepare: archheaders archscripts prepare1 scripts_basic | |
| prepare0: archprepare FORCE | |
| $(Q)$(MAKE) $(build)=. | |
| # 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 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 + 0$(PATCHLEVEL) \* 256 + 0$(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 $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ | |
| $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
| # --------------------------------------------------------------------------- | |
| 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 += archheaders | |
| archheaders: | |
| PHONY += archscripts | |
| archscripts: | |
| PHONY += __headers | |
| __headers: include/linux/version.h scripts_basic asm-generic archheaders archscripts FORCE | |
| $(Q)$(MAKE) $(build)=scripts build_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)/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 check | |
| PHONY += 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_: | |
| @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/generated \ | |
| arch/*/include/generated | |
| MRPROPER_FILES += .config .config.old .version .old_version \ | |
| include/linux/version.h \ | |
| Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS | |
| # clean - Delete most, but leave enough to build external modules | |
| # | |
| clean: rm-dirs := $(CLEAN_DIRS) | |
| clean: rm-files := $(CLEAN_FILES) | |
| clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) | |
| PHONY += $(clean-dirs) clean archclean | |
| $(clean-dirs): | |
| $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
| clean: archclean | |
| # 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) \ | |
| \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
| -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ | |
| -o -name '.*.rej' \ | |
| -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ | |
| -type f -print | xargs rm -f | |
| # Packaging of the kernel to various formats | |
| # --------------------------------------------------------------------------- | |
| # rpm target kept for backward compatibility | |
| package-dir := $(srctree)/scripts/package | |
| %src-pkg: FORCE | |
| $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
| %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 ' gtags - Generate GNU GLOBAL 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' | |
| @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help | |
| @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 ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' | |
| @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' | |
| @echo ' 1: warnings which may be relevant and do not occur too often' | |
| @echo ' 2: warnings which occur quite often but may still be relevant' | |
| @echo ' 3: more obscure warnings, can most likely be ignored' | |
| @echo ' Multiple levels can be combined with W=12 or W=123' | |
| @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)=scripts build_docproc | |
| $(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 | |
| 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 | |
| clean: $(clean-dirs) | |
| $(call cmd,rmdirs) | |
| $(call cmd,rmfiles) | |
| @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ | |
| \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | |
| -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
| -o -name '*.symtypes' -o -name 'modules.order' \ | |
| -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
| -o -name '*.gcno' \) -type f -print | xargs rm -f | |
| # Generate tags for editors | |
| # --------------------------------------------------------------------------- | |
| quiet_cmd_tags = GEN $@ | |
| cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
| tags TAGS cscope gtags: FORCE | |
| $(call cmd,tags) | |
| # Scripts to check various things for consistency | |
| # --------------------------------------------------------------------------- | |
| PHONY += includecheck versioncheck coccicheck namespacecheck export_report | |
| includecheck: | |
| find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
| -name '*.[hcS]' -type f -print | sort \ | |
| | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
| versioncheck: | |
| find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
| -name '*.[hcS]' -type f -print | sort \ | |
| | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
| coccicheck: | |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
| 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 $$(find . -name '*.ko') | \ | |
| $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) | |
| kernelrelease: | |
| @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
| 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 = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ | |
| $(KERNELRELEASE) | |
| # 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) \ | |
| $(KBUILD_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) |