5 NAME = Holy Dancing Manatees, Batman!
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 avoid hard-to-debug behavour);
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 := $(O)
107 # That's our default target when none is given on the command line
111 ifneq ($(KBUILD_OUTPUT),)
112 # Invoke a second make in the output directory, passing relevant variables
113 # check that the output directory actually exists
114 saved-output := $(KBUILD_OUTPUT)
115 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
116 $(if $(KBUILD_OUTPUT),, \
117 $(error output directory "$(saved-output)" does not exist))
119 PHONY += $(MAKECMDGOALS)
121 $(filter-out _all,$(MAKECMDGOALS)) _all:
122 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
123 KBUILD_SRC=$(CURDIR) \
124 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
126 # Leave processing to above invocation of make
128 endif # ifneq ($(KBUILD_OUTPUT),)
129 endif # ifeq ($(KBUILD_SRC),)
131 # We process the rest of the Makefile if this is the final invocation of make
132 ifeq ($(skip-makefile),)
134 # If building an external module we do not care about the all: rule
135 # but instead _all depend on modules
137 ifeq ($(KBUILD_EXTMOD),)
143 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
145 # FIXME - TOPDIR is obsolete, use srctree/objtree
150 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
152 export srctree objtree VPATH TOPDIR
155 # SUBARCH tells the usermode build what the underlying arch is. That is set
156 # first, and if a usermode build is happening, the "ARCH=um" on the command
157 # line overrides the setting of ARCH below. If a native build is happening,
158 # then ARCH is assigned, getting whatever value it gets normally, and
159 # SUBARCH is subsequently ignored.
161 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
162 -e s/arm.*/arm/ -e s/sa110/arm/ \
163 -e s/s390x/s390/ -e s/parisc64/parisc/ \
164 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
166 # Cross compiling and selecting different set of gcc/bin-utils
167 # ---------------------------------------------------------------------------
169 # When performing cross compilation for other architectures ARCH shall be set
170 # to the target architecture. (See arch/* for the possibilities).
171 # ARCH can be set during invocation of make:
173 # Another way is to have ARCH set in the environment.
174 # The default ARCH is the host where make is executed.
176 # CROSS_COMPILE specify the prefix used for all executables used
177 # during compilation. Only gcc and related bin-utils executables
178 # are prefixed with $(CROSS_COMPILE).
179 # CROSS_COMPILE can be set on the command line
180 # make CROSS_COMPILE=ia64-linux-
181 # Alternatively CROSS_COMPILE can be set in the environment.
182 # Default value for CROSS_COMPILE is not to prefix executables
183 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
188 # Architecture as present in compile.h
189 UTS_MACHINE := $(ARCH)
191 KCONFIG_CONFIG ?= .config
193 # SHELL used by kbuild
194 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
195 else if [ -x /bin/bash ]; then echo /bin/bash; \
196 else echo sh; fi ; fi)
200 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
203 # Decide whether to build built-in, modular, or both.
204 # Normally, just do built-in.
209 # If we have only "make modules", don't compile built-in objects.
210 # When we're building modules with modversions, we need to consider
211 # the built-in objects during the descend as well, in order to
212 # make sure the checksums are up to date before we record them.
214 ifeq ($(MAKECMDGOALS),modules)
215 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
218 # If we have "make <whatever> modules", compile modules
219 # in addition to whatever we do anyway.
220 # Just "make" or "make all" shall build modules as well
222 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
226 ifeq ($(MAKECMDGOALS),)
230 export KBUILD_MODULES KBUILD_BUILTIN
231 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
234 # ---------------------------------------------------------------------------
236 # Normally, we echo the whole command before executing it. By making
237 # that echo $($(quiet)$(cmd)), we now have the possibility to set
238 # $(quiet) to choose other forms of output instead, e.g.
240 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
241 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
243 # If $(quiet) is empty, the whole command will be printed.
244 # If it is set to "quiet_", only the short version will be printed.
245 # If it is set to "silent_", nothing will be printed at all, since
246 # the variable $(silent_cmd_cc_o_c) doesn't exist.
248 # A simple variant is to prefix commands with $(Q) - that's useful
249 # for commands that shall be hidden in non-verbose mode.
253 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
254 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
256 ifeq ($(KBUILD_VERBOSE),1)
264 # If the user is running make -s (silent mode), suppress echoing of
267 ifneq ($(findstring s,$(MAKEFLAGS)),)
271 export quiet Q KBUILD_VERBOSE
274 # Look for make include files relative to root of kernel src
275 MAKEFLAGS += --include-dir=$(srctree)
277 # We need some generic definitions.
278 include $(srctree)/scripts/Kbuild.include
280 # Make variables (CC, etc...)
282 AS = $(CROSS_COMPILE)as
283 LD = $(CROSS_COMPILE)ld
284 CC = $(CROSS_COMPILE)gcc
286 AR = $(CROSS_COMPILE)ar
287 NM = $(CROSS_COMPILE)nm
288 STRIP = $(CROSS_COMPILE)strip
289 OBJCOPY = $(CROSS_COMPILE)objcopy
290 OBJDUMP = $(CROSS_COMPILE)objdump
292 GENKSYMS = scripts/genksyms/genksyms
293 DEPMOD = /sbin/depmod
294 KALLSYMS = scripts/kallsyms
298 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
300 CFLAGS_MODULE = $(MODFLAGS)
301 AFLAGS_MODULE = $(MODFLAGS)
307 # Use LINUXINCLUDE when you must reference the include/ directory.
308 # Needed to be compatible with the O= option
309 LINUXINCLUDE := -Iinclude \
310 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
311 -include include/linux/autoconf.h
313 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
315 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
316 -fno-strict-aliasing -fno-common \
317 -Werror-implicit-function-declaration
318 AFLAGS := -D__ASSEMBLY__
320 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
321 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
322 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
324 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
325 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
326 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
327 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
329 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
330 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
331 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
333 # When compiling out-of-tree modules, put MODVERDIR in the module
334 # tree rather than in the kernel tree. The kernel tree might
336 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
338 # Files to ignore in find ... statements
340 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
341 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
343 # ===========================================================================
344 # Rules shared between *config targets and build targets
346 # Basic helpers built in scripts/
347 PHONY += scripts_basic
349 $(Q)$(MAKE) $(build)=scripts/basic
351 # To avoid any implicit rule to kick in, define an empty command.
352 scripts/basic/%: scripts_basic ;
354 PHONY += outputmakefile
355 # outputmakefile generates a Makefile in the output directory, if using a
356 # separate output directory. This allows convenient use of make in the
359 ifneq ($(KBUILD_SRC),)
360 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
361 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
364 # To make sure we do not include .config for any of the *config targets
365 # catch them early, and hand them over to scripts/kconfig/Makefile
366 # It is allowed to specify more targets when calling make, including
367 # mixing *config targets and build targets.
368 # For example 'make oldconfig all'.
369 # Detect when mixed targets is specified, and make a second invocation
370 # of make so .config is not included in this case either (for *config).
372 no-dot-config-targets := clean mrproper distclean \
373 cscope TAGS tags help %docs check% \
374 include/linux/version.h headers_% \
375 kernelrelease kernelversion
381 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
382 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
387 ifeq ($(KBUILD_EXTMOD),)
388 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
390 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
396 ifeq ($(mixed-targets),1)
397 # ===========================================================================
398 # We're called with mixed targets (*config and build targets).
399 # Handle them one by one.
402 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
405 ifeq ($(config-targets),1)
406 # ===========================================================================
407 # *config targets only - make sure prerequisites are updated, and descend
408 # in scripts/kconfig to make the *config target
410 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
411 # KBUILD_DEFCONFIG may point out an alternative default configuration
412 # used for 'make defconfig'
413 include $(srctree)/arch/$(ARCH)/Makefile
414 export KBUILD_DEFCONFIG
416 config %config: scripts_basic outputmakefile FORCE
417 $(Q)mkdir -p include/linux include/config
418 $(Q)$(MAKE) $(build)=scripts/kconfig $@
421 # ===========================================================================
422 # Build targets only - this includes vmlinux, arch specific targets, clean
423 # targets and others. In general all targets except *config targets.
425 ifeq ($(KBUILD_EXTMOD),)
426 # Additional helpers built in scripts/
427 # Carefully list dependencies so we do not try to build scripts twice
430 scripts: scripts_basic include/config/auto.conf
431 $(Q)$(MAKE) $(build)=$(@)
433 # Objects we will link into vmlinux / subdirs we need to visit
435 drivers-y := drivers/ sound/
439 endif # KBUILD_EXTMOD
441 ifeq ($(dot-config),1)
443 -include include/config/auto.conf
445 ifeq ($(KBUILD_EXTMOD),)
446 # Read in dependencies to all Kconfig* files, make sure to run
447 # oldconfig if changes are detected.
448 -include include/config/auto.conf.cmd
450 # To avoid any implicit rule to kick in, define an empty command
451 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
453 # If .config is newer than include/config/auto.conf, someone tinkered
454 # with it and forgot to run make oldconfig.
455 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
456 # we execute the config step to be sure to catch updated Kconfig files
457 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
458 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
460 # external modules needs include/linux/autoconf.h and include/config/auto.conf
461 # but do not care if they are up-to-date. Use auto.conf to trigger the test
462 PHONY += include/config/auto.conf
464 include/config/auto.conf:
465 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
467 echo " ERROR: Kernel configuration is invalid."; \
468 echo " include/linux/autoconf.h or $@ are missing."; \
469 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
473 endif # KBUILD_EXTMOD
476 # Dummy target needed, because used as prerequisite
477 include/config/auto.conf: ;
478 endif # $(dot-config)
480 # The all: target is the default when no target is given on the
482 # This allow a user to issue only 'make' to build a kernel including modules
483 # Defaults vmlinux but it is usually overridden in the arch makefile
486 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
492 include $(srctree)/arch/$(ARCH)/Makefile
494 ifdef CONFIG_FRAME_POINTER
495 CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
497 CFLAGS += -fomit-frame-pointer
500 ifdef CONFIG_DEBUG_INFO
504 # Force gcc to behave correct even for buggy distributions
505 CFLAGS += $(call cc-option, -fno-stack-protector)
507 # arch Makefile may override CC so keep this after arch Makefile is included
508 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
509 CHECKFLAGS += $(NOSTDINC_FLAGS)
511 # warn about C99 declaration after statement
512 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
514 # disable pointer signed / unsigned warnings in gcc 4.0
515 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
517 # Use --build-id when available.
518 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
519 $(call ld-option, -Wl$(comma)--build-id,))
520 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
521 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
523 # Default kernel image to build when no specific target is given.
524 # KBUILD_IMAGE may be overruled on the command line or
525 # set in the environment
526 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
528 export KBUILD_IMAGE ?= vmlinux
531 # INSTALL_PATH specifies where to place the updated kernel and system map
532 # images. Default is /boot, but you can set it to other values
533 export INSTALL_PATH ?= /boot
536 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
537 # relocations required by build roots. This is not defined in the
538 # makefile but the argument can be passed to make if needed.
541 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
545 # INSTALL_MOD_STRIP, if defined, will cause modules to be
546 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
547 # the default option --strip-debug will be used. Otherwise,
548 # INSTALL_MOD_STRIP will used as the options to the strip command.
550 ifdef INSTALL_MOD_STRIP
551 ifeq ($(INSTALL_MOD_STRIP),1)
552 mod_strip_cmd = $(STRIP) --strip-debug
554 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
555 endif # INSTALL_MOD_STRIP=1
558 endif # INSTALL_MOD_STRIP
562 ifeq ($(KBUILD_EXTMOD),)
563 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
565 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
566 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
567 $(net-y) $(net-m) $(libs-y) $(libs-m)))
569 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
571 $(core-n) $(core-) $(drivers-n) $(drivers-) \
572 $(net-n) $(net-) $(libs-n) $(libs-))))
574 init-y := $(patsubst %/, %/built-in.o, $(init-y))
575 core-y := $(patsubst %/, %/built-in.o, $(core-y))
576 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
577 net-y := $(patsubst %/, %/built-in.o, $(net-y))
578 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
579 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
580 libs-y := $(libs-y1) $(libs-y2)
583 # ---------------------------------------------------------------------------
584 # vmlinux is built from the objects selected by $(vmlinux-init) and
585 # $(vmlinux-main). Most are built-in.o files from top-level directories
586 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
587 # Ordering when linking is important, and $(vmlinux-init) must be first.
592 # +-< $(vmlinux-init)
593 # | +--< init/version.o + more
595 # +--< $(vmlinux-main)
596 # | +--< driver/built-in.o mm/built-in.o + more
598 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
600 # vmlinux version (uname -v) cannot be updated during normal
601 # descending-into-subdirs phase since we do not yet know if we need to
603 # Therefore this step is delayed until just before final link of vmlinux -
604 # except in the kallsyms case where it is done just before adding the
605 # symbols to the kernel.
607 # System.map is generated to document addresses of all kernel symbols
609 vmlinux-init := $(head-y) $(init-y)
610 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
611 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
612 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
613 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
615 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
616 # May be overridden by arch/$(ARCH)/Makefile
617 quiet_cmd_vmlinux__ ?= LD $@
618 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
619 -T $(vmlinux-lds) $(vmlinux-init) \
620 --start-group $(vmlinux-main) --end-group \
621 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
623 # Generate new vmlinux version
624 quiet_cmd_vmlinux_version = GEN .version
625 cmd_vmlinux_version = set -e; \
626 if [ ! -r .version ]; then \
630 mv .version .old_version; \
631 expr 0$$(cat .old_version) + 1 >.version; \
633 $(MAKE) $(build)=init
635 # Generate System.map
636 quiet_cmd_sysmap = SYSMAP
637 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
640 # If CONFIG_KALLSYMS is set .version is already updated
641 # Generate System.map and verify that the content is consistent
642 # Use + in front of the vmlinux_version rule to silent warning with make -j2
643 # First command is ':' to allow us to use + in front of the rule
644 define rule_vmlinux__
646 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
648 $(call cmd,vmlinux__)
649 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
651 $(Q)$(if $($(quiet)cmd_sysmap), \
652 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
653 $(cmd_sysmap) $@ System.map; \
654 if [ $$? -ne 0 ]; then \
662 ifdef CONFIG_KALLSYMS
663 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
664 # It's a three stage process:
665 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
667 # Running kallsyms on that gives us .tmp_kallsyms1.o with
668 # the right size - vmlinux version (uname -v) is updated during this step
669 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
670 # but due to the added section, some addresses have shifted.
671 # From here, we generate a correct .tmp_kallsyms2.o
672 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
673 # o Verify that the System.map from vmlinux matches the map from
674 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
675 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
676 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
677 # temporary bypass to allow the kernel to be built while the
678 # maintainers work out what went wrong with kallsyms.
680 ifdef CONFIG_KALLSYMS_EXTRA_PASS
686 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
688 define verify_kallsyms
689 $(Q)$(if $($(quiet)cmd_sysmap), \
690 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
691 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
692 $(Q)cmp -s System.map .tmp_System.map || \
693 (echo Inconsistent kallsyms data; \
694 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
695 rm .tmp_kallsyms* ; /bin/false )
698 # Update vmlinux version before link
699 # Use + in front of this rule to silent warning about make -j1
700 # First command is ':' to allow us to use + in front of this rule
701 cmd_ksym_ld = $(cmd_vmlinux__)
704 +$(call cmd,vmlinux_version)
705 $(call cmd,vmlinux__)
706 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
709 # Generate .S file with all kernel symbols
710 quiet_cmd_kallsyms = KSYM $@
711 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
712 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
714 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
715 $(call if_changed_dep,as_o_S)
717 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
720 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
721 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
722 $(call if_changed_rule,ksym_ld)
724 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
725 $(call if_changed,vmlinux__)
727 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
728 $(call if_changed,vmlinux__)
730 # Needs to visit scripts/ before $(KALLSYMS) can be used.
731 $(KALLSYMS): scripts ;
733 # Generate some data for debugging strange kallsyms problems
734 debug_kallsyms: .tmp_map$(last_kallsyms)
736 .tmp_map%: .tmp_vmlinux% FORCE
737 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
743 endif # ifdef CONFIG_KALLSYMS
745 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
746 # relevant sections renamed as per the linker script.
747 quiet_cmd_vmlinux-modpost = LD $@
748 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
749 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
750 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
751 define rule_vmlinux-modpost
753 +$(call cmd,vmlinux-modpost)
754 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
755 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
758 # vmlinux image - including updated kernel symbols
759 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
760 ifdef CONFIG_HEADERS_CHECK
761 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
763 $(call vmlinux-modpost)
764 $(call if_changed_rule,vmlinux__)
765 $(Q)rm -f .old_version
767 vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
768 $(call if_changed_rule,vmlinux-modpost)
770 # The actual objects are generated when descending,
771 # make sure no implicit rule kicks in
772 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
774 # Handle descending into subdirectories listed in $(vmlinux-dirs)
775 # Preset locale variables to speed up the build process. Limit locale
776 # tweaks to this spot to avoid wrong language settings when running
777 # make menuconfig etc.
778 # Error messages still appears in the original language
780 PHONY += $(vmlinux-dirs)
781 $(vmlinux-dirs): prepare scripts
782 $(Q)$(MAKE) $(build)=$@
784 # Build the kernel release string
786 # The KERNELRELEASE value built here is stored in the file
787 # include/config/kernel.release, and is used when executing several
788 # make targets, such as "make install" or "make modules_install."
790 # The eventual kernel release string consists of the following fields,
791 # shown in a hierarchical format to show how smaller parts are concatenated
792 # to form the larger and final value, with values coming from places like
793 # the Makefile, kernel config options, make command line options and/or
794 # SCM tag information.
798 # $(PATCHLEVEL) eg, 6
800 # $(EXTRAVERSION) eg, -rc6
803 # localversion* (files without backups, containing '~')
804 # $(CONFIG_LOCALVERSION) (from kernel config setting)
805 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
806 # ./scripts/setlocalversion (SCM tag, if one exists)
807 # $(LOCALVERSION) (from make command line if provided)
809 # Note how the final $(localver-auto) string is included *only* if the
810 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
811 # moment, only git is supported but other SCMs can edit the script
812 # scripts/setlocalversion and add the appropriate checks as needed.
814 pattern = ".*/localversion[^~]*"
815 string = $(shell cat /dev/null \
816 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
818 localver = $(subst $(space),, $(string) \
819 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
821 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
822 # and if the SCM is know a tag from the SCM is appended.
823 # The appended tag is determined by the SCM used.
825 # Currently, only git is supported.
826 # Other SCMs can edit scripts/setlocalversion and add the appropriate
828 ifdef CONFIG_LOCALVERSION_AUTO
829 _localver-auto = $(shell $(CONFIG_SHELL) \
830 $(srctree)/scripts/setlocalversion $(srctree))
831 localver-auto = $(LOCALVERSION)$(_localver-auto)
834 localver-full = $(localver)$(localver-auto)
836 # Store (new) KERNELRELASE string in include/config/kernel.release
837 kernelrelease = $(KERNELVERSION)$(localver-full)
838 include/config/kernel.release: include/config/auto.conf FORCE
840 $(Q)echo $(kernelrelease) > $@
843 # Things we need to do before we recursively start building the kernel
844 # or the modules are listed in "prepare".
845 # A multi level approach is used. prepareN is processed before prepareN-1.
846 # archprepare is used in arch Makefiles and when processed asm symlink,
847 # version.h and scripts_basic is processed / created.
849 # Listed in dependency order
850 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
852 # prepare3 is used to check if we are building in a separate output directory,
854 # 1) Check that make has not been executed in the kernel src $(srctree)
855 # 2) Create the include2 directory, used for the second asm symlink
856 prepare3: include/config/kernel.release
857 ifneq ($(KBUILD_SRC),)
858 @echo ' Using $(srctree) as source for kernel'
859 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
860 echo " $(srctree) is not clean, please run 'make mrproper'";\
861 echo " in the '$(srctree)' directory.";\
864 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
865 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
868 # prepare2 creates a makefile if using a separate output directory
869 prepare2: prepare3 outputmakefile
871 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
872 include/asm include/config/auto.conf
873 ifneq ($(KBUILD_MODULES),)
874 $(Q)mkdir -p $(MODVERDIR)
875 $(Q)rm -f $(MODVERDIR)/*
878 archprepare: prepare1 scripts_basic
880 prepare0: archprepare FORCE
881 $(Q)$(MAKE) $(build)=.
882 $(Q)$(MAKE) $(build)=. missing-syscalls
884 # All the preparing..
887 # Leave this as default for preprocessing vmlinux.lds.S, which is now
888 # done in arch/$(ARCH)/kernel/Makefile
890 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
892 # FIXME: The asm symlink changes when $(ARCH) changes. That's
893 # hard to detect, but I suppose "make mrproper" is a good idea
894 # before switching between archs anyway.
897 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
898 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
899 @ln -fsn asm-$(ARCH) $@
901 # Generate some files
902 # ---------------------------------------------------------------------------
904 # KERNELRELEASE can change from a few different places, meaning version.h
905 # needs to be updated, so this check is forced on all builds
908 define filechk_utsrelease.h
909 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
910 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
913 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
916 define filechk_version.h
917 (echo \#define LINUX_VERSION_CODE $(shell \
918 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
919 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
922 include/linux/version.h: $(srctree)/Makefile FORCE
923 $(call filechk,version.h)
925 include/linux/utsrelease.h: include/config/kernel.release FORCE
926 $(call filechk,utsrelease.h)
928 # ---------------------------------------------------------------------------
932 @echo '*** Warning: make $@ is unnecessary now.'
934 # ---------------------------------------------------------------------------
936 INSTALL_HDR_PATH=$(objtree)/usr
937 export INSTALL_HDR_PATH
939 HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
941 PHONY += headers_install_all
942 headers_install_all: include/linux/version.h scripts_basic FORCE
943 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
944 $(Q)for arch in $(HDRARCHES); do \
945 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
948 PHONY += headers_install
949 headers_install: include/linux/version.h scripts_basic FORCE
950 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
951 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
953 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
954 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
956 PHONY += headers_check_all
957 headers_check_all: headers_install_all
958 $(Q)for arch in $(HDRARCHES); do \
959 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
962 PHONY += headers_check
963 headers_check: headers_install
964 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
966 # ---------------------------------------------------------------------------
971 # By default, build modules as well
978 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
979 @echo ' Building modules, stage 2.';
980 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
983 # Target to prepare building external modules
984 PHONY += modules_prepare
985 modules_prepare: prepare scripts
987 # Target to install modules
988 PHONY += modules_install
989 modules_install: _modinst_ _modinst_post
993 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
994 echo "Warning: you may need to install module-init-tools"; \
995 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
998 @rm -rf $(MODLIB)/kernel
999 @rm -f $(MODLIB)/source
1000 @mkdir -p $(MODLIB)/kernel
1001 @ln -s $(srctree) $(MODLIB)/source
1002 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1003 rm -f $(MODLIB)/build ; \
1004 ln -s $(objtree) $(MODLIB)/build ; \
1006 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1008 # If System.map exists, run depmod. This deliberately does not have a
1009 # dependency on System.map since that would run the dependency tree on
1010 # vmlinux. This depmod is only for convenience to give the initial
1011 # boot a modules.dep even before / is mounted read-write. However the
1012 # boot script depmod is the master version.
1013 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
1016 depmod_opts := -b $(INSTALL_MOD_PATH) -r
1018 PHONY += _modinst_post
1019 _modinst_post: _modinst_
1020 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1022 else # CONFIG_MODULES
1024 # Modules not configured
1025 # ---------------------------------------------------------------------------
1027 modules modules_install: FORCE
1029 @echo "The present kernel configuration has modules disabled."
1030 @echo "Type 'make config' and enable loadable module support."
1031 @echo "Then build a kernel with module support enabled."
1035 endif # CONFIG_MODULES
1038 # Cleaning is done on three levels.
1039 # make clean Delete most generated files
1040 # Leave enough to build external modules
1041 # make mrproper Delete the current configuration, and all generated files
1042 # make distclean Remove editor backup files, patch leftover files and the like
1044 # Directories & files removed with 'make clean'
1045 CLEAN_DIRS += $(MODVERDIR)
1046 CLEAN_FILES += vmlinux System.map \
1047 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1049 # Directories & files removed with 'make mrproper'
1050 MRPROPER_DIRS += include/config include2 usr/include
1051 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1052 include/linux/autoconf.h include/linux/version.h \
1053 include/linux/utsrelease.h \
1054 Module.symvers tags TAGS cscope*
1056 # clean - Delete most, but leave enough to build external modules
1058 clean: rm-dirs := $(CLEAN_DIRS)
1059 clean: rm-files := $(CLEAN_FILES)
1060 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1062 PHONY += $(clean-dirs) clean archclean
1064 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1066 clean: archclean $(clean-dirs)
1069 @find . $(RCS_FIND_IGNORE) \
1070 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1071 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1072 -o -name '*.symtypes' \) \
1073 -type f -print | xargs rm -f
1075 # mrproper - Delete all generated files, including .config
1077 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1078 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1079 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1081 PHONY += $(mrproper-dirs) mrproper archmrproper
1083 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1085 mrproper: clean archmrproper $(mrproper-dirs)
1094 @find $(srctree) $(RCS_FIND_IGNORE) \
1095 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1096 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1097 -o -name '.*.rej' -o -size 0 \
1098 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1099 -type f -print | xargs rm -f
1102 # Packaging of the kernel to various formats
1103 # ---------------------------------------------------------------------------
1104 # rpm target kept for backward compatibility
1105 package-dir := $(srctree)/scripts/package
1107 %pkg: include/config/kernel.release FORCE
1108 $(Q)$(MAKE) $(build)=$(package-dir) $@
1109 rpm: include/config/kernel.release FORCE
1110 $(Q)$(MAKE) $(build)=$(package-dir) $@
1113 # Brief documentation of the typical targets used
1114 # ---------------------------------------------------------------------------
1116 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1117 boards := $(notdir $(boards))
1120 @echo 'Cleaning targets:'
1121 @echo ' clean - Remove most generated files but keep the config and'
1122 @echo ' enough build support to build external modules'
1123 @echo ' mrproper - Remove all generated files + config + various backup files'
1124 @echo ' distclean - mrproper + remove editor backup and patch files'
1126 @echo 'Configuration targets:'
1127 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1129 @echo 'Other generic targets:'
1130 @echo ' all - Build all targets marked with [*]'
1131 @echo '* vmlinux - Build the bare kernel'
1132 @echo '* modules - Build all modules'
1133 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1134 @echo ' dir/ - Build all files in dir and below'
1135 @echo ' dir/file.[ois] - Build specified target only'
1136 @echo ' dir/file.ko - Build module including final link'
1137 @echo ' rpm - Build a kernel as an RPM package'
1138 @echo ' tags/TAGS - Generate tags file for editors'
1139 @echo ' cscope - Generate cscope index'
1140 @echo ' kernelrelease - Output the release version string'
1141 @echo ' kernelversion - Output the version stored in Makefile'
1142 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1143 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1144 echo ' (default: $(INSTALL_HDR_PATH))'; \
1147 @echo 'Static analysers'
1148 @echo ' checkstack - Generate a list of stack hogs'
1149 @echo ' namespacecheck - Name space analysis on compiled kernel'
1150 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1151 echo ' headers_check - Sanity check on exported headers'; \
1154 @echo 'Kernel packaging:'
1155 @$(MAKE) $(build)=$(package-dir) help
1157 @echo 'Documentation targets:'
1158 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1160 @echo 'Architecture specific targets ($(ARCH)):'
1161 @$(if $(archhelp),$(archhelp),\
1162 echo ' No architecture specific help defined for $(ARCH)')
1165 $(foreach b, $(boards), \
1166 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1169 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1170 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1171 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1172 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1173 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1175 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1176 @echo 'For further info see the ./README file'
1179 # Documentation targets
1180 # ---------------------------------------------------------------------------
1181 %docs: scripts_basic FORCE
1182 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1184 else # KBUILD_EXTMOD
1187 # External module support.
1188 # When building external modules the kernel used as basis is considered
1189 # read-only, and no consistency checks are made and the make
1190 # system is not used on the basis kernel. If updates are required
1191 # in the basis kernel ordinary make commands (without M=...) must
1194 # The following are the only valid targets when building external
1196 # make M=dir clean Delete all automatically generated files
1197 # make M=dir modules Make all modules in specified dir
1198 # make M=dir Same as 'make M=dir modules'
1199 # make M=dir modules_install
1200 # Install the modules built in the module directory
1201 # Assumes install directory is already created
1203 # We are always building modules
1205 PHONY += crmodverdir
1207 $(Q)mkdir -p $(MODVERDIR)
1208 $(Q)rm -f $(MODVERDIR)/*
1210 PHONY += $(objtree)/Module.symvers
1211 $(objtree)/Module.symvers:
1212 @test -e $(objtree)/Module.symvers || ( \
1214 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1215 echo " is missing; modules will have no dependencies and modversions."; \
1218 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1219 PHONY += $(module-dirs) modules
1220 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1221 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1223 modules: $(module-dirs)
1224 @echo ' Building modules, stage 2.';
1225 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1227 PHONY += modules_install
1228 modules_install: _emodinst_ _emodinst_post
1230 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1233 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1234 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1236 # Run depmod only is we have System.map and depmod is executable
1237 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1238 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1239 $(DEPMOD) -ae -F System.map \
1240 $(if $(strip $(INSTALL_MOD_PATH)), \
1241 -b $(INSTALL_MOD_PATH) -r) \
1245 PHONY += _emodinst_post
1246 _emodinst_post: _emodinst_
1249 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1251 PHONY += $(clean-dirs) clean
1253 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1255 clean: rm-dirs := $(MODVERDIR)
1256 clean: $(clean-dirs)
1258 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1259 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1260 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1261 -type f -print | xargs rm -f
1264 @echo ' Building external modules.'
1265 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1267 @echo ' modules - default target, build the module(s)'
1268 @echo ' modules_install - install the module'
1269 @echo ' clean - remove generated files in module directory only'
1273 PHONY += prepare scripts
1276 endif # KBUILD_EXTMOD
1278 # Generate tags for editors
1279 # ---------------------------------------------------------------------------
1281 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1282 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1283 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1285 ifeq ($(src),$(obj))
1288 __srctree = $(srctree)/
1291 ifeq ($(ALLSOURCE_ARCHS),)
1293 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1295 ALLINCLUDE_ARCHS := $(ARCH)
1298 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1299 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1302 ALLSOURCE_ARCHS := $(ARCH)
1305 ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
1306 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1309 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1311 find $(__srctree)include $(RCS_FIND_IGNORE) \
1312 \( -name config -o -name 'asm-*' \) -prune \
1313 -o -name $1 -print; \
1314 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1315 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1318 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1320 find $(__srctree) $(RCS_FIND_IGNORE) \
1321 \( -name include -o -name arch \) -prune -o \
1327 $(call find-sources,'*.[chS]')
1330 $(call find-sources,'Kconfig*')
1332 define all-defconfigs
1333 $(call find-sources,'defconfig')
1337 if $1 --version 2>&1 | grep -iq exuberant; then \
1338 $(all-sources) | xargs $1 -a \
1339 -I __initdata,__exitdata,__acquires,__releases \
1340 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1341 --extra=+f --c-kinds=+px \
1342 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1343 $(all-kconfigs) | xargs $1 -a \
1345 --language-force=kconfig \
1346 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1347 $(all-defconfigs) | xargs -r $1 -a \
1348 --langdef=dotconfig \
1349 --language-force=dotconfig \
1350 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1351 elif $1 --version 2>&1 | grep -iq emacs; then \
1352 $(all-sources) | xargs $1 -a; \
1353 $(all-kconfigs) | xargs $1 -a \
1354 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1355 $(all-defconfigs) | xargs -r $1 -a \
1356 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1358 $(all-sources) | xargs $1 -a; \
1362 quiet_cmd_cscope-file = FILELST cscope.files
1363 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1365 quiet_cmd_cscope = MAKE cscope.out
1366 cmd_cscope = cscope -b
1369 $(call cmd,cscope-file)
1372 quiet_cmd_TAGS = MAKE $@
1381 quiet_cmd_tags = MAKE $@
1391 # Scripts to check various things for consistency
1392 # ---------------------------------------------------------------------------
1395 find * $(RCS_FIND_IGNORE) \
1396 -name '*.[hcS]' -type f -print | sort \
1397 | xargs $(PERL) -w scripts/checkincludes.pl
1400 find * $(RCS_FIND_IGNORE) \
1401 -name '*.[hcS]' -type f -print | sort \
1402 | xargs $(PERL) -w scripts/checkversion.pl
1405 $(PERL) $(srctree)/scripts/namespace.pl
1407 endif #ifeq ($(config-targets),1)
1408 endif #ifeq ($(mixed-targets),1)
1410 PHONY += checkstack kernelrelease kernelversion
1412 # UML needs a little special treatment here. It wants to use the host
1413 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1414 # else wants $(ARCH), including people doing cross-builds, which means
1415 # that $(SUBARCH) doesn't work here.
1417 CHECKSTACK_ARCH := $(SUBARCH)
1419 CHECKSTACK_ARCH := $(ARCH)
1422 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1423 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1426 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1427 $(error kernelrelease not valid - run 'make prepare' to update it))
1429 @echo $(KERNELVERSION)
1432 # ---------------------------------------------------------------------------
1433 # Single targets are compatible with:
1434 # - build whith mixed source and output
1435 # - build with separate output dir 'make O=...'
1436 # - external modules
1438 # target-dir => where to store outputfile
1439 # build-dir => directory in kernel source tree to use
1441 ifeq ($(KBUILD_EXTMOD),)
1442 build-dir = $(patsubst %/,%,$(dir $@))
1443 target-dir = $(dir $@)
1445 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1446 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1447 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1450 %.s: %.c prepare scripts FORCE
1451 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1452 %.i: %.c prepare scripts FORCE
1453 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1454 %.o: %.c prepare scripts FORCE
1455 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1456 %.lst: %.c prepare scripts FORCE
1457 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1458 %.s: %.S prepare scripts FORCE
1459 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1460 %.o: %.S prepare scripts FORCE
1461 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1462 %.symtypes: %.c prepare scripts FORCE
1463 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1466 / %/: prepare scripts FORCE
1467 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1468 $(build)=$(build-dir)
1469 %.ko: prepare scripts FORCE
1470 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1471 $(build)=$(build-dir) $(@:.ko=.o)
1472 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1474 # FIXME Should go into a make.lib or something
1475 # ===========================================================================
1477 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1478 cmd_rmdirs = rm -rf $(rm-dirs)
1480 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1481 cmd_rmfiles = rm -f $(rm-files)
1484 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1485 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1486 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1488 quiet_cmd_as_o_S = AS $@
1489 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1491 # read all saved command lines
1493 targets := $(wildcard $(sort $(targets)))
1494 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1496 ifneq ($(cmd_files),)
1497 $(cmd_files): ; # Do not try to update included dependency files
1498 include $(cmd_files)
1501 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1503 # $(Q)$(MAKE) $(clean)=dir
1504 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1506 endif # skip-makefile
1511 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1514 # Declare the contents of the .PHONY variable as phony. We keep that
1515 # information in a variable se we can use it in if_changed and friends.