5 NAME = Temporary Tasmanian Devil
8 # To see a list of typical targets execute "make help"
9 # More info can be located in ./README
10 # Comments in this file are targeted only to the developer, do not
11 # expect to learn how to build the kernel reading this file.
14 # o use make's built-in rules and variables
15 # (this increases performance and avoids hard-to-debug behaviour);
16 # o print "Entering directory ...";
17 MAKEFLAGS += -rR --no-print-directory
19 # We are using a recursive build, so we need to do a little thinking
20 # to get the ordering right.
22 # Most importantly: sub-Makefiles should only ever modify files in
23 # their own directory. If in some directory we have a dependency on
24 # a file in another dir (which doesn't happen often, but it's often
25 # unavoidable when linking the built-in.o targets which finally
26 # turn into vmlinux), we will call a sub make in that other dir, and
27 # after that we are sure that everything which is in that other dir
30 # The only cases where we need to modify files which have global
31 # effects are thus separated out and done before the recursive
32 # descending is started. They are now explicitly listed as the
35 # To put more focus on warnings, be less verbose as default
36 # Use 'make V=1' to see the full commands
39 ifeq ("$(origin V)", "command line")
47 # Call a source code checker (by default, "sparse") as part of the
50 # Use 'make C=1' to enable checking of only re-compiled files.
51 # Use 'make C=2' to enable checking of *all* source files, regardless
52 # of whether they are re-compiled or not.
54 # See the file "Documentation/sparse.txt" for more details, including
55 # where to get the "sparse" utility.
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
62 ifndef KBUILD_CHECKSRC
66 # Use make M=dir to specify directory of external module to build
67 # Old syntax make ... SUBDIRS=$PWD is still supported
68 # Setting the environment variable KBUILD_EXTMOD take precedence
70 KBUILD_EXTMOD ?= $(SUBDIRS)
73 ifeq ("$(origin M)", "command line")
79 # kbuild supports saving output files in a separate directory.
80 # To locate output files in a separate directory two syntaxes are supported.
81 # In both cases the working directory must be the root of the kernel src.
83 # Use "make O=dir/to/store/output/files/"
85 # 2) Set KBUILD_OUTPUT
86 # Set the environment variable KBUILD_OUTPUT to point to the directory
87 # where the output files shall be placed.
88 # export KBUILD_OUTPUT=dir/to/store/output/files/
91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
95 # KBUILD_SRC is set on invocation of make in OBJ directory
96 # KBUILD_SRC is not intended to be used by the regular user (for now)
99 # OK, Make called in directory where kernel src resides
100 # Do we want to locate output files in a separate directory?
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
107 # That's our default target when none is given on the command line
111 # Cancel implicit rules on top Makefile
112 $(CURDIR)/Makefile Makefile: ;
114 ifneq ($(KBUILD_OUTPUT),)
115 # Invoke a second make in the output directory, passing relevant variables
116 # check that the output directory actually exists
117 saved-output := $(KBUILD_OUTPUT)
118 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119 $(if $(KBUILD_OUTPUT),, \
120 $(error output directory "$(saved-output)" does not exist))
122 PHONY += $(MAKECMDGOALS) sub-make
124 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
129 KBUILD_SRC=$(CURDIR) \
130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
131 $(filter-out _all sub-make,$(MAKECMDGOALS))
133 # Leave processing to above invocation of make
135 endif # ifneq ($(KBUILD_OUTPUT),)
136 endif # ifeq ($(KBUILD_SRC),)
138 # We process the rest of the Makefile if this is the final invocation of make
139 ifeq ($(skip-makefile),)
141 # If building an external module we do not care about the all: rule
142 # but instead _all depend on modules
144 ifeq ($(KBUILD_EXTMOD),)
150 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
152 # FIXME - TOPDIR is obsolete, use srctree/objtree
157 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
159 export srctree objtree VPATH TOPDIR
162 # SUBARCH tells the usermode build what the underlying arch is. That is set
163 # first, and if a usermode build is happening, the "ARCH=um" on the command
164 # line overrides the setting of ARCH below. If a native build is happening,
165 # then ARCH is assigned, getting whatever value it gets normally, and
166 # SUBARCH is subsequently ignored.
168 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
174 # Cross compiling and selecting different set of gcc/bin-utils
175 # ---------------------------------------------------------------------------
177 # When performing cross compilation for other architectures ARCH shall be set
178 # to the target architecture. (See arch/* for the possibilities).
179 # ARCH can be set during invocation of make:
181 # Another way is to have ARCH set in the environment.
182 # The default ARCH is the host where make is executed.
184 # CROSS_COMPILE specify the prefix used for all executables used
185 # during compilation. Only gcc and related bin-utils executables
186 # are prefixed with $(CROSS_COMPILE).
187 # CROSS_COMPILE can be set on the command line
188 # make CROSS_COMPILE=ia64-linux-
189 # Alternatively CROSS_COMPILE can be set in the environment.
190 # Default value for CROSS_COMPILE is not to prefix executables
191 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
192 export KBUILD_BUILDHOST := $(SUBARCH)
196 # Architecture as present in compile.h
197 UTS_MACHINE := $(ARCH)
200 # Additional ARCH settings for x86
204 ifeq ($(ARCH),x86_64)
208 # Additional ARCH settings for sparc
209 ifeq ($(ARCH),sparc64)
213 # Where to locate arch specific headers
214 hdr-arch := $(SRCARCH)
216 ifeq ($(ARCH),m68knommu)
220 KCONFIG_CONFIG ?= .config
222 # SHELL used by kbuild
223 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
224 else if [ -x /bin/bash ]; then echo /bin/bash; \
225 else echo sh; fi ; fi)
229 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
232 # Decide whether to build built-in, modular, or both.
233 # Normally, just do built-in.
238 # If we have only "make modules", don't compile built-in objects.
239 # When we're building modules with modversions, we need to consider
240 # the built-in objects during the descend as well, in order to
241 # make sure the checksums are up to date before we record them.
243 ifeq ($(MAKECMDGOALS),modules)
244 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
247 # If we have "make <whatever> modules", compile modules
248 # in addition to whatever we do anyway.
249 # Just "make" or "make all" shall build modules as well
251 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
255 ifeq ($(MAKECMDGOALS),)
259 export KBUILD_MODULES KBUILD_BUILTIN
260 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
263 # ---------------------------------------------------------------------------
265 # Normally, we echo the whole command before executing it. By making
266 # that echo $($(quiet)$(cmd)), we now have the possibility to set
267 # $(quiet) to choose other forms of output instead, e.g.
269 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
270 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
272 # If $(quiet) is empty, the whole command will be printed.
273 # If it is set to "quiet_", only the short version will be printed.
274 # If it is set to "silent_", nothing will be printed at all, since
275 # the variable $(silent_cmd_cc_o_c) doesn't exist.
277 # A simple variant is to prefix commands with $(Q) - that's useful
278 # for commands that shall be hidden in non-verbose mode.
282 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
283 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
285 ifeq ($(KBUILD_VERBOSE),1)
293 # If the user is running make -s (silent mode), suppress echoing of
296 ifneq ($(findstring s,$(MAKEFLAGS)),)
300 export quiet Q KBUILD_VERBOSE
303 # Look for make include files relative to root of kernel src
304 MAKEFLAGS += --include-dir=$(srctree)
306 # We need some generic definitions (do not try to remake the file).
307 $(srctree)/scripts/Kbuild.include: ;
308 include $(srctree)/scripts/Kbuild.include
310 # Make variables (CC, etc...)
312 AS = $(CROSS_COMPILE)as
313 LD = $(CROSS_COMPILE)ld
314 CC = $(CROSS_COMPILE)gcc
316 AR = $(CROSS_COMPILE)ar
317 NM = $(CROSS_COMPILE)nm
318 STRIP = $(CROSS_COMPILE)strip
319 OBJCOPY = $(CROSS_COMPILE)objcopy
320 OBJDUMP = $(CROSS_COMPILE)objdump
322 GENKSYMS = scripts/genksyms/genksyms
323 DEPMOD = /sbin/depmod
324 KALLSYMS = scripts/kallsyms
328 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
329 -Wbitwise -Wno-return-void $(CF)
331 CFLAGS_MODULE = $(MODFLAGS)
332 AFLAGS_MODULE = $(MODFLAGS)
338 # Use LINUXINCLUDE when you must reference the include/ directory.
339 # Needed to be compatible with the O= option
340 LINUXINCLUDE := -Iinclude \
341 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
342 -I$(srctree)/arch/$(hdr-arch)/include \
343 -include include/linux/autoconf.h
345 KBUILD_CPPFLAGS := -D__KERNEL__
347 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
348 -fno-strict-aliasing -fno-common \
349 -Werror-implicit-function-declaration
350 KBUILD_AFLAGS := -D__ASSEMBLY__
352 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
353 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
354 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
356 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
357 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
358 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
359 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
361 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
362 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
363 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
365 # When compiling out-of-tree modules, put MODVERDIR in the module
366 # tree rather than in the kernel tree. The kernel tree might
368 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
370 # Files to ignore in find ... statements
372 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
373 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
375 # ===========================================================================
376 # Rules shared between *config targets and build targets
378 # Basic helpers built in scripts/
379 PHONY += scripts_basic
381 $(Q)$(MAKE) $(build)=scripts/basic
383 # To avoid any implicit rule to kick in, define an empty command.
384 scripts/basic/%: scripts_basic ;
386 PHONY += outputmakefile
387 # outputmakefile generates a Makefile in the output directory, if using a
388 # separate output directory. This allows convenient use of make in the
391 ifneq ($(KBUILD_SRC),)
392 $(Q)ln -fsn $(srctree) source
393 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
394 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
397 # To make sure we do not include .config for any of the *config targets
398 # catch them early, and hand them over to scripts/kconfig/Makefile
399 # It is allowed to specify more targets when calling make, including
400 # mixing *config targets and build targets.
401 # For example 'make oldconfig all'.
402 # Detect when mixed targets is specified, and make a second invocation
403 # of make so .config is not included in this case either (for *config).
405 no-dot-config-targets := clean mrproper distclean \
406 cscope TAGS tags help %docs check% \
407 include/linux/version.h headers_% \
408 kernelrelease kernelversion
414 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
415 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
420 ifeq ($(KBUILD_EXTMOD),)
421 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
423 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
429 ifeq ($(mixed-targets),1)
430 # ===========================================================================
431 # We're called with mixed targets (*config and build targets).
432 # Handle them one by one.
435 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
438 ifeq ($(config-targets),1)
439 # ===========================================================================
440 # *config targets only - make sure prerequisites are updated, and descend
441 # in scripts/kconfig to make the *config target
443 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
444 # KBUILD_DEFCONFIG may point out an alternative default configuration
445 # used for 'make defconfig'
446 include $(srctree)/arch/$(SRCARCH)/Makefile
447 export KBUILD_DEFCONFIG KBUILD_KCONFIG
449 config: scripts_basic outputmakefile FORCE
450 $(Q)mkdir -p include/linux include/config
451 $(Q)$(MAKE) $(build)=scripts/kconfig $@
453 %config: scripts_basic outputmakefile FORCE
454 $(Q)mkdir -p include/linux include/config
455 $(Q)$(MAKE) $(build)=scripts/kconfig $@
458 # ===========================================================================
459 # Build targets only - this includes vmlinux, arch specific targets, clean
460 # targets and others. In general all targets except *config targets.
462 ifeq ($(KBUILD_EXTMOD),)
463 # Additional helpers built in scripts/
464 # Carefully list dependencies so we do not try to build scripts twice
467 scripts: scripts_basic include/config/auto.conf
468 $(Q)$(MAKE) $(build)=$(@)
470 # Objects we will link into vmlinux / subdirs we need to visit
472 drivers-y := drivers/ sound/ firmware/
476 endif # KBUILD_EXTMOD
478 ifeq ($(dot-config),1)
480 -include include/config/auto.conf
482 ifeq ($(KBUILD_EXTMOD),)
483 # Read in dependencies to all Kconfig* files, make sure to run
484 # oldconfig if changes are detected.
485 -include include/config/auto.conf.cmd
487 # To avoid any implicit rule to kick in, define an empty command
488 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
490 # If .config is newer than include/config/auto.conf, someone tinkered
491 # with it and forgot to run make oldconfig.
492 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
493 # we execute the config step to be sure to catch updated Kconfig files
494 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
495 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
497 # external modules needs include/linux/autoconf.h and include/config/auto.conf
498 # but do not care if they are up-to-date. Use auto.conf to trigger the test
499 PHONY += include/config/auto.conf
501 include/config/auto.conf:
502 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
504 echo " ERROR: Kernel configuration is invalid."; \
505 echo " include/linux/autoconf.h or $@ are missing."; \
506 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
510 endif # KBUILD_EXTMOD
513 # Dummy target needed, because used as prerequisite
514 include/config/auto.conf: ;
515 endif # $(dot-config)
517 # The all: target is the default when no target is given on the
519 # This allow a user to issue only 'make' to build a kernel including modules
520 # Defaults vmlinux but it is usually overridden in the arch makefile
523 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
529 include $(srctree)/arch/$(SRCARCH)/Makefile
531 ifneq (CONFIG_FRAME_WARN,0)
532 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
535 # Force gcc to behave correct even for buggy distributions
536 ifndef CONFIG_CC_STACKPROTECTOR
537 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
540 ifdef CONFIG_FRAME_POINTER
541 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
543 KBUILD_CFLAGS += -fomit-frame-pointer
546 ifdef CONFIG_DEBUG_INFO
548 KBUILD_AFLAGS += -gdwarf-2
551 ifdef CONFIG_FUNCTION_TRACER
555 # We trigger additional mismatches with less inlining
556 ifdef CONFIG_DEBUG_SECTION_MISMATCH
557 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
560 # arch Makefile may override CC so keep this after arch Makefile is included
561 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
562 CHECKFLAGS += $(NOSTDINC_FLAGS)
564 # warn about C99 declaration after statement
565 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
567 # disable pointer signed / unsigned warnings in gcc 4.0
568 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
570 # disable invalid "can't wrap" optimzations for signed / pointers
571 KBUILD_CFLAGS += $(call cc-option,-fwrapv)
573 # revert to pre-gcc-4.4 behaviour of .eh_frame
574 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
576 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
577 # But warn user when we do so
579 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
581 ifneq ($(KCPPFLAGS),)
582 $(call warn-assign,CPPFLAGS)
583 KBUILD_CPPFLAGS += $(KCPPFLAGS)
586 $(call warn-assign,AFLAGS)
587 KBUILD_AFLAGS += $(KAFLAGS)
590 $(call warn-assign,CFLAGS)
591 KBUILD_CFLAGS += $(KCFLAGS)
594 # Use --build-id when available.
595 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
596 $(call ld-option, -Wl$(comma)--build-id,))
597 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
598 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
600 # Default kernel image to build when no specific target is given.
601 # KBUILD_IMAGE may be overruled on the command line or
602 # set in the environment
603 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
605 export KBUILD_IMAGE ?= vmlinux
608 # INSTALL_PATH specifies where to place the updated kernel and system map
609 # images. Default is /boot, but you can set it to other values
610 export INSTALL_PATH ?= /boot
613 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
614 # relocations required by build roots. This is not defined in the
615 # makefile but the argument can be passed to make if needed.
618 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
622 # INSTALL_MOD_STRIP, if defined, will cause modules to be
623 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
624 # the default option --strip-debug will be used. Otherwise,
625 # INSTALL_MOD_STRIP will used as the options to the strip command.
627 ifdef INSTALL_MOD_STRIP
628 ifeq ($(INSTALL_MOD_STRIP),1)
629 mod_strip_cmd = $(STRIP) --strip-debug
631 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
632 endif # INSTALL_MOD_STRIP=1
635 endif # INSTALL_MOD_STRIP
639 ifeq ($(KBUILD_EXTMOD),)
640 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
642 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
643 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
644 $(net-y) $(net-m) $(libs-y) $(libs-m)))
646 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
648 $(core-n) $(core-) $(drivers-n) $(drivers-) \
649 $(net-n) $(net-) $(libs-n) $(libs-))))
651 init-y := $(patsubst %/, %/built-in.o, $(init-y))
652 core-y := $(patsubst %/, %/built-in.o, $(core-y))
653 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
654 net-y := $(patsubst %/, %/built-in.o, $(net-y))
655 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
656 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
657 libs-y := $(libs-y1) $(libs-y2)
660 # ---------------------------------------------------------------------------
661 # vmlinux is built from the objects selected by $(vmlinux-init) and
662 # $(vmlinux-main). Most are built-in.o files from top-level directories
663 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
664 # Ordering when linking is important, and $(vmlinux-init) must be first.
669 # +-< $(vmlinux-init)
670 # | +--< init/version.o + more
672 # +--< $(vmlinux-main)
673 # | +--< driver/built-in.o mm/built-in.o + more
675 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
677 # vmlinux version (uname -v) cannot be updated during normal
678 # descending-into-subdirs phase since we do not yet know if we need to
680 # Therefore this step is delayed until just before final link of vmlinux -
681 # except in the kallsyms case where it is done just before adding the
682 # symbols to the kernel.
684 # System.map is generated to document addresses of all kernel symbols
686 vmlinux-init := $(head-y) $(init-y)
687 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
688 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
689 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
690 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
692 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
693 # May be overridden by arch/$(ARCH)/Makefile
694 quiet_cmd_vmlinux__ ?= LD $@
695 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
696 -T $(vmlinux-lds) $(vmlinux-init) \
697 --start-group $(vmlinux-main) --end-group \
698 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
700 # Generate new vmlinux version
701 quiet_cmd_vmlinux_version = GEN .version
702 cmd_vmlinux_version = set -e; \
703 if [ ! -r .version ]; then \
707 mv .version .old_version; \
708 expr 0$$(cat .old_version) + 1 >.version; \
710 $(MAKE) $(build)=init
712 # Generate System.map
713 quiet_cmd_sysmap = SYSMAP
714 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
717 # If CONFIG_KALLSYMS is set .version is already updated
718 # Generate System.map and verify that the content is consistent
719 # Use + in front of the vmlinux_version rule to silent warning with make -j2
720 # First command is ':' to allow us to use + in front of the rule
721 define rule_vmlinux__
723 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
725 $(call cmd,vmlinux__)
726 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
728 $(Q)$(if $($(quiet)cmd_sysmap), \
729 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
730 $(cmd_sysmap) $@ System.map; \
731 if [ $$? -ne 0 ]; then \
739 ifdef CONFIG_KALLSYMS
740 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
741 # It's a three stage process:
742 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
744 # Running kallsyms on that gives us .tmp_kallsyms1.o with
745 # the right size - vmlinux version (uname -v) is updated during this step
746 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
747 # but due to the added section, some addresses have shifted.
748 # From here, we generate a correct .tmp_kallsyms2.o
749 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
750 # o Verify that the System.map from vmlinux matches the map from
751 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
752 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
753 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
754 # temporary bypass to allow the kernel to be built while the
755 # maintainers work out what went wrong with kallsyms.
757 ifdef CONFIG_KALLSYMS_EXTRA_PASS
763 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
765 define verify_kallsyms
766 $(Q)$(if $($(quiet)cmd_sysmap), \
767 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
768 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
769 $(Q)cmp -s System.map .tmp_System.map || \
770 (echo Inconsistent kallsyms data; \
771 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
772 rm .tmp_kallsyms* ; /bin/false )
775 # Update vmlinux version before link
776 # Use + in front of this rule to silent warning about make -j1
777 # First command is ':' to allow us to use + in front of this rule
778 cmd_ksym_ld = $(cmd_vmlinux__)
781 +$(call cmd,vmlinux_version)
782 $(call cmd,vmlinux__)
783 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
786 # Generate .S file with all kernel symbols
787 quiet_cmd_kallsyms = KSYM $@
788 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
789 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
791 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
792 $(call if_changed_dep,as_o_S)
794 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
797 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
798 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
799 $(call if_changed_rule,ksym_ld)
801 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
802 $(call if_changed,vmlinux__)
804 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
805 $(call if_changed,vmlinux__)
807 # Needs to visit scripts/ before $(KALLSYMS) can be used.
808 $(KALLSYMS): scripts ;
810 # Generate some data for debugging strange kallsyms problems
811 debug_kallsyms: .tmp_map$(last_kallsyms)
813 .tmp_map%: .tmp_vmlinux% FORCE
814 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
820 endif # ifdef CONFIG_KALLSYMS
822 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
823 # relevant sections renamed as per the linker script.
824 quiet_cmd_vmlinux-modpost = LD $@
825 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
826 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
827 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
828 define rule_vmlinux-modpost
830 +$(call cmd,vmlinux-modpost)
831 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
832 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
835 # vmlinux image - including updated kernel symbols
836 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
837 ifdef CONFIG_HEADERS_CHECK
838 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
841 $(Q)$(MAKE) $(build)=samples
843 ifdef CONFIG_BUILD_DOCSRC
844 $(Q)$(MAKE) $(build)=Documentation
846 $(call vmlinux-modpost)
847 $(call if_changed_rule,vmlinux__)
848 $(Q)rm -f .old_version
850 # build vmlinux.o first to catch section mismatch errors early
851 ifdef CONFIG_KALLSYMS
852 .tmp_vmlinux1: vmlinux.o
855 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
856 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
857 $(call if_changed_rule,vmlinux-modpost)
859 # The actual objects are generated when descending,
860 # make sure no implicit rule kicks in
861 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
863 # Handle descending into subdirectories listed in $(vmlinux-dirs)
864 # Preset locale variables to speed up the build process. Limit locale
865 # tweaks to this spot to avoid wrong language settings when running
866 # make menuconfig etc.
867 # Error messages still appears in the original language
869 PHONY += $(vmlinux-dirs)
870 $(vmlinux-dirs): prepare scripts
871 $(Q)$(MAKE) $(build)=$@
873 # Build the kernel release string
875 # The KERNELRELEASE value built here is stored in the file
876 # include/config/kernel.release, and is used when executing several
877 # make targets, such as "make install" or "make modules_install."
879 # The eventual kernel release string consists of the following fields,
880 # shown in a hierarchical format to show how smaller parts are concatenated
881 # to form the larger and final value, with values coming from places like
882 # the Makefile, kernel config options, make command line options and/or
883 # SCM tag information.
887 # $(PATCHLEVEL) eg, 6
889 # $(EXTRAVERSION) eg, -rc6
892 # localversion* (files without backups, containing '~')
893 # $(CONFIG_LOCALVERSION) (from kernel config setting)
894 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
895 # ./scripts/setlocalversion (SCM tag, if one exists)
896 # $(LOCALVERSION) (from make command line if provided)
898 # Note how the final $(localver-auto) string is included *only* if the
899 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
900 # moment, only git is supported but other SCMs can edit the script
901 # scripts/setlocalversion and add the appropriate checks as needed.
903 pattern = ".*/localversion[^~]*"
904 string = $(shell cat /dev/null \
905 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
907 localver = $(subst $(space),, $(string) \
908 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
910 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
911 # and if the SCM is know a tag from the SCM is appended.
912 # The appended tag is determined by the SCM used.
914 # .scmversion is used when generating rpm packages so we do not loose
915 # the version information from the SCM when we do the build of the kernel
916 # from the copied source
917 ifdef CONFIG_LOCALVERSION_AUTO
919 ifeq ($(wildcard .scmversion),)
920 _localver-auto = $(shell $(CONFIG_SHELL) \
921 $(srctree)/scripts/setlocalversion $(srctree))
923 _localver-auto = $(shell cat .scmversion 2> /dev/null)
926 localver-auto = $(LOCALVERSION)$(_localver-auto)
929 localver-full = $(localver)$(localver-auto)
931 # Store (new) KERNELRELASE string in include/config/kernel.release
932 kernelrelease = $(KERNELVERSION)$(localver-full)
933 include/config/kernel.release: include/config/auto.conf FORCE
935 $(Q)echo $(kernelrelease) > $@
938 # Things we need to do before we recursively start building the kernel
939 # or the modules are listed in "prepare".
940 # A multi level approach is used. prepareN is processed before prepareN-1.
941 # archprepare is used in arch Makefiles and when processed asm symlink,
942 # version.h and scripts_basic is processed / created.
944 # Listed in dependency order
945 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
947 # prepare3 is used to check if we are building in a separate output directory,
949 # 1) Check that make has not been executed in the kernel src $(srctree)
950 # 2) Create the include2 directory, used for the second asm symlink
951 prepare3: include/config/kernel.release
952 ifneq ($(KBUILD_SRC),)
953 @$(kecho) ' Using $(srctree) as source for kernel'
954 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
955 echo " $(srctree) is not clean, please run 'make mrproper'";\
956 echo " in the '$(srctree)' directory.";\
959 $(Q)if [ ! -d include2 ]; then \
961 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
965 # prepare2 creates a makefile if using a separate output directory
966 prepare2: prepare3 outputmakefile
968 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
969 include/asm include/config/auto.conf
972 archprepare: prepare1 scripts_basic
974 prepare0: archprepare FORCE
975 $(Q)$(MAKE) $(build)=.
976 $(Q)$(MAKE) $(build)=. missing-syscalls
978 # All the preparing..
981 # Leave this as default for preprocessing vmlinux.lds.S, which is now
982 # done in arch/$(ARCH)/kernel/Makefile
984 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
986 # The asm symlink changes when $(ARCH) changes.
987 # Detect this and ask user to run make mrproper
988 # If asm is a stale symlink (point to dir that does not exist) remove it
991 if [ -L include/asm ]; then \
992 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
993 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
994 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
995 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
998 test -e $$asmlink || rm include/asm; \
999 elif [ -d include/asm ]; then \
1000 echo "ERROR: $@ is a directory but a symlink was expected";\
1005 # We create the target directory of the symlink if it does
1006 # not exist so the test in check-symlink works and we have a
1007 # directory for generated filesas used by some architectures.
1008 define create-symlink
1009 if [ ! -L include/asm ]; then \
1010 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
1011 if [ ! -d include/asm-$(SRCARCH) ]; then \
1012 mkdir -p include/asm-$(SRCARCH); \
1014 ln -fsn asm-$(SRCARCH) $@; \
1019 $(Q)$(check-symlink)
1020 $(Q)$(create-symlink)
1022 # Generate some files
1023 # ---------------------------------------------------------------------------
1025 # KERNELRELEASE can change from a few different places, meaning version.h
1026 # needs to be updated, so this check is forced on all builds
1029 define filechk_utsrelease.h
1030 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1031 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1034 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1037 define filechk_version.h
1038 (echo \#define LINUX_VERSION_CODE $(shell \
1039 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1040 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1043 include/linux/version.h: $(srctree)/Makefile FORCE
1044 $(call filechk,version.h)
1046 include/linux/utsrelease.h: include/config/kernel.release FORCE
1047 $(call filechk,utsrelease.h)
1051 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1053 # ---------------------------------------------------------------------------
1057 @echo '*** Warning: make $@ is unnecessary now.'
1059 # ---------------------------------------------------------------------------
1061 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1062 export INSTALL_FW_PATH
1064 PHONY += firmware_install
1065 firmware_install: FORCE
1066 @mkdir -p $(objtree)/firmware
1067 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1069 # ---------------------------------------------------------------------------
1072 #Default location for installed headers
1073 export INSTALL_HDR_PATH = $(objtree)/usr
1075 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1076 # Find out where the Kbuild file is located to support
1077 # arch/$(ARCH)/include/asm
1079 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1080 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1082 # If we do an all arch process set dst to asm-$(hdr-arch)
1083 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1086 __headers: include/linux/version.h scripts_basic FORCE
1087 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1089 PHONY += headers_install_all
1090 headers_install_all:
1091 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1093 PHONY += headers_install
1094 headers_install: __headers
1095 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1096 $(error Headers not exportable for the $(SRCARCH) architecture))
1097 $(Q)$(MAKE) $(hdr-inst)=include
1098 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1100 PHONY += headers_check_all
1101 headers_check_all: headers_install_all
1102 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1104 PHONY += headers_check
1105 headers_check: headers_install
1106 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1107 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1109 # ---------------------------------------------------------------------------
1112 ifdef CONFIG_MODULES
1114 # By default, build modules as well
1120 # A module can be listed more than once in obj-m resulting in
1121 # duplicate lines in modules.order files. Those are removed
1122 # using awk while concatenating to the final file.
1125 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1126 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1127 @$(kecho) ' Building modules, stage 2.';
1128 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1132 # Target to prepare building external modules
1133 PHONY += modules_prepare
1134 modules_prepare: prepare scripts
1136 # Target to install modules
1137 PHONY += modules_install
1138 modules_install: _modinst_ _modinst_post
1142 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1143 echo "Warning: you may need to install module-init-tools"; \
1144 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1147 @rm -rf $(MODLIB)/kernel
1148 @rm -f $(MODLIB)/source
1149 @mkdir -p $(MODLIB)/kernel
1150 @ln -s $(srctree) $(MODLIB)/source
1151 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1152 rm -f $(MODLIB)/build ; \
1153 ln -s $(objtree) $(MODLIB)/build ; \
1155 @cp -f $(objtree)/modules.order $(MODLIB)/
1156 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1158 # This depmod is only for convenience to give the initial
1159 # boot a modules.dep even before / is mounted read-write. However the
1160 # boot script depmod is the master version.
1161 PHONY += _modinst_post
1162 _modinst_post: _modinst_
1163 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1166 else # CONFIG_MODULES
1168 # Modules not configured
1169 # ---------------------------------------------------------------------------
1171 modules modules_install: FORCE
1173 @echo "The present kernel configuration has modules disabled."
1174 @echo "Type 'make config' and enable loadable module support."
1175 @echo "Then build a kernel with module support enabled."
1179 endif # CONFIG_MODULES
1182 # Cleaning is done on three levels.
1183 # make clean Delete most generated files
1184 # Leave enough to build external modules
1185 # make mrproper Delete the current configuration, and all generated files
1186 # make distclean Remove editor backup files, patch leftover files and the like
1188 # Directories & files removed with 'make clean'
1189 CLEAN_DIRS += $(MODVERDIR)
1190 CLEAN_FILES += vmlinux System.map \
1191 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1193 # Directories & files removed with 'make mrproper'
1194 MRPROPER_DIRS += include/config include2 usr/include
1195 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1196 include/linux/autoconf.h include/linux/version.h \
1197 include/linux/utsrelease.h \
1198 include/linux/bounds.h include/asm*/asm-offsets.h \
1199 Module.symvers Module.markers tags TAGS cscope*
1201 # clean - Delete most, but leave enough to build external modules
1203 clean: rm-dirs := $(CLEAN_DIRS)
1204 clean: rm-files := $(CLEAN_FILES)
1205 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1207 PHONY += $(clean-dirs) clean archclean
1209 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1211 clean: archclean $(clean-dirs)
1214 @find . $(RCS_FIND_IGNORE) \
1215 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1216 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1217 -o -name '*.symtypes' -o -name 'modules.order' \
1218 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
1219 -type f -print | xargs rm -f
1221 # mrproper - Delete all generated files, including .config
1223 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1224 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1225 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1227 PHONY += $(mrproper-dirs) mrproper archmrproper
1229 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1231 mrproper: clean archmrproper $(mrproper-dirs)
1240 @find $(srctree) $(RCS_FIND_IGNORE) \
1241 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1242 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1243 -o -name '.*.rej' -o -size 0 \
1244 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1245 -type f -print | xargs rm -f
1248 # Packaging of the kernel to various formats
1249 # ---------------------------------------------------------------------------
1250 # rpm target kept for backward compatibility
1251 package-dir := $(srctree)/scripts/package
1253 %pkg: include/config/kernel.release FORCE
1254 $(Q)$(MAKE) $(build)=$(package-dir) $@
1255 rpm: include/config/kernel.release FORCE
1256 $(Q)$(MAKE) $(build)=$(package-dir) $@
1259 # Brief documentation of the typical targets used
1260 # ---------------------------------------------------------------------------
1262 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1263 boards := $(notdir $(boards))
1264 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1265 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1268 @echo 'Cleaning targets:'
1269 @echo ' clean - Remove most generated files but keep the config and'
1270 @echo ' enough build support to build external modules'
1271 @echo ' mrproper - Remove all generated files + config + various backup files'
1272 @echo ' distclean - mrproper + remove editor backup and patch files'
1274 @echo 'Configuration targets:'
1275 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1277 @echo 'Other generic targets:'
1278 @echo ' all - Build all targets marked with [*]'
1279 @echo '* vmlinux - Build the bare kernel'
1280 @echo '* modules - Build all modules'
1281 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1282 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1283 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1284 @echo ' dir/ - Build all files in dir and below'
1285 @echo ' dir/file.[ois] - Build specified target only'
1286 @echo ' dir/file.ko - Build module including final link'
1287 @echo ' prepare - Set up for building external modules'
1288 @echo ' tags/TAGS - Generate tags file for editors'
1289 @echo ' cscope - Generate cscope index'
1290 @echo ' kernelrelease - Output the release version string'
1291 @echo ' kernelversion - Output the version stored in Makefile'
1292 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1293 echo ' (default: $(INSTALL_HDR_PATH))'; \
1295 @echo 'Static analysers'
1296 @echo ' checkstack - Generate a list of stack hogs'
1297 @echo ' namespacecheck - Name space analysis on compiled kernel'
1298 @echo ' versioncheck - Sanity check on version.h usage'
1299 @echo ' includecheck - Check for duplicate included header files'
1300 @echo ' export_report - List the usages of all exported symbols'
1301 @echo ' headers_check - Sanity check on exported headers'
1302 @echo ' headerdep - Detect inclusion cycles in headers'; \
1304 @echo 'Kernel packaging:'
1305 @$(MAKE) $(build)=$(package-dir) help
1307 @echo 'Documentation targets:'
1308 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1310 @echo 'Architecture specific targets ($(SRCARCH)):'
1311 @$(if $(archhelp),$(archhelp),\
1312 echo ' No architecture specific help defined for $(SRCARCH)')
1315 $(foreach b, $(boards), \
1316 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1318 @$(if $(board-dirs), \
1319 $(foreach b, $(board-dirs), \
1320 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1321 printf " %-16s - Show all of the above\\n" help-boards; \
1324 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1325 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1326 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1327 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1328 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1330 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1331 @echo 'For further info see the ./README file'
1334 help-board-dirs := $(addprefix help-,$(board-dirs))
1336 help-boards: $(help-board-dirs)
1338 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1340 $(help-board-dirs): help-%:
1341 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1342 @$(if $(boards-per-dir), \
1343 $(foreach b, $(boards-per-dir), \
1344 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1348 # Documentation targets
1349 # ---------------------------------------------------------------------------
1350 %docs: scripts_basic FORCE
1351 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1353 else # KBUILD_EXTMOD
1356 # External module support.
1357 # When building external modules the kernel used as basis is considered
1358 # read-only, and no consistency checks are made and the make
1359 # system is not used on the basis kernel. If updates are required
1360 # in the basis kernel ordinary make commands (without M=...) must
1363 # The following are the only valid targets when building external
1365 # make M=dir clean Delete all automatically generated files
1366 # make M=dir modules Make all modules in specified dir
1367 # make M=dir Same as 'make M=dir modules'
1368 # make M=dir modules_install
1369 # Install the modules built in the module directory
1370 # Assumes install directory is already created
1372 # We are always building modules
1374 PHONY += crmodverdir
1378 PHONY += $(objtree)/Module.symvers
1379 $(objtree)/Module.symvers:
1380 @test -e $(objtree)/Module.symvers || ( \
1382 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1383 echo " is missing; modules will have no dependencies and modversions."; \
1386 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1387 PHONY += $(module-dirs) modules
1388 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1389 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1391 modules: $(module-dirs)
1392 @$(kecho) ' Building modules, stage 2.';
1393 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1395 PHONY += modules_install
1396 modules_install: _emodinst_ _emodinst_post
1398 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1401 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1402 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1404 PHONY += _emodinst_post
1405 _emodinst_post: _emodinst_
1408 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1410 PHONY += $(clean-dirs) clean
1412 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1414 clean: rm-dirs := $(MODVERDIR)
1415 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1416 clean: $(clean-dirs)
1419 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1420 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1421 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1422 -type f -print | xargs rm -f
1425 @echo ' Building external modules.'
1426 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1428 @echo ' modules - default target, build the module(s)'
1429 @echo ' modules_install - install the module'
1430 @echo ' clean - remove generated files in module directory only'
1434 PHONY += prepare scripts
1437 endif # KBUILD_EXTMOD
1439 # Generate tags for editors
1440 # ---------------------------------------------------------------------------
1441 quiet_cmd_tags = GEN $@
1442 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1444 tags TAGS cscope: FORCE
1447 # Scripts to check various things for consistency
1448 # ---------------------------------------------------------------------------
1451 find * $(RCS_FIND_IGNORE) \
1452 -name '*.[hcS]' -type f -print | sort \
1453 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1456 find * $(RCS_FIND_IGNORE) \
1457 -name '*.[hcS]' -type f -print | sort \
1458 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1461 $(PERL) $(srctree)/scripts/namespace.pl
1464 $(PERL) $(srctree)/scripts/export_report.pl
1466 endif #ifeq ($(config-targets),1)
1467 endif #ifeq ($(mixed-targets),1)
1469 PHONY += checkstack kernelrelease kernelversion
1471 # UML needs a little special treatment here. It wants to use the host
1472 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1473 # else wants $(ARCH), including people doing cross-builds, which means
1474 # that $(SUBARCH) doesn't work here.
1476 CHECKSTACK_ARCH := $(SUBARCH)
1478 CHECKSTACK_ARCH := $(ARCH)
1481 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1482 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1485 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1486 $(error kernelrelease not valid - run 'make prepare' to update it))
1488 @echo $(KERNELVERSION)
1491 # ---------------------------------------------------------------------------
1492 # Single targets are compatible with:
1493 # - build with mixed source and output
1494 # - build with separate output dir 'make O=...'
1495 # - external modules
1497 # target-dir => where to store outputfile
1498 # build-dir => directory in kernel source tree to use
1500 ifeq ($(KBUILD_EXTMOD),)
1501 build-dir = $(patsubst %/,%,$(dir $@))
1502 target-dir = $(dir $@)
1504 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1505 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1506 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1509 %.s: %.c prepare scripts FORCE
1510 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1511 %.i: %.c prepare scripts FORCE
1512 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1513 %.o: %.c prepare scripts FORCE
1514 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1515 %.lst: %.c prepare scripts FORCE
1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1517 %.s: %.S prepare scripts FORCE
1518 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1519 %.o: %.S prepare scripts FORCE
1520 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1521 %.symtypes: %.c prepare scripts FORCE
1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1525 /: prepare scripts FORCE
1527 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1528 $(build)=$(build-dir)
1529 %/: prepare scripts FORCE
1531 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1532 $(build)=$(build-dir)
1533 %.ko: prepare scripts FORCE
1535 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1536 $(build)=$(build-dir) $(@:.ko=.o)
1537 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1539 # FIXME Should go into a make.lib or something
1540 # ===========================================================================
1542 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1543 cmd_rmdirs = rm -rf $(rm-dirs)
1545 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1546 cmd_rmfiles = rm -f $(rm-files)
1548 # Run depmod only if we have System.map and depmod is executable
1549 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1551 if [ -r System.map -a -x $(DEPMOD) ]; then \
1552 $(DEPMOD) -ae -F System.map \
1553 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
1557 # Create temporary dir for module support files
1558 # clean it up only when building all modules
1559 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1560 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1562 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1563 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1564 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1566 quiet_cmd_as_o_S = AS $@
1567 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1569 # read all saved command lines
1571 targets := $(wildcard $(sort $(targets)))
1572 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1574 ifneq ($(cmd_files),)
1575 $(cmd_files): ; # Do not try to update included dependency files
1576 include $(cmd_files)
1579 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1581 # $(Q)$(MAKE) $(clean)=dir
1582 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1584 endif # skip-makefile
1589 # Declare the contents of the .PHONY variable as phony. We keep that
1590 # information in a variable se we can use it in if_changed and friends.