5 NAME=Crazed Snow-Weasel
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.
13 # Do not print "Entering directory ..."
14 MAKEFLAGS += --no-print-directory
16 # We are using a recursive build, so we need to do a little thinking
17 # to get the ordering right.
19 # Most importantly: sub-Makefiles should only ever modify files in
20 # their own directory. If in some directory we have a dependency on
21 # a file in another dir (which doesn't happen often, but it's often
22 # unavoidable when linking the built-in.o targets which finally
23 # turn into vmlinux), we will call a sub make in that other dir, and
24 # after that we are sure that everything which is in that other dir
27 # The only cases where we need to modify files which have global
28 # effects are thus separated out and done before the recursive
29 # descending is started. They are now explicitly listed as the
32 # To put more focus on warnings, be less verbose as default
33 # Use 'make V=1' to see the full commands
36 ifeq ("$(origin V)", "command line")
44 # Call sparse as part of compilation of C files
45 # Use 'make C=1' to enable sparse checking
48 ifeq ("$(origin C)", "command line")
49 KBUILD_CHECKSRC = $(C)
52 ifndef KBUILD_CHECKSRC
56 # Use make M=dir to specify directory of external module to build
57 # Old syntax make ... SUBDIRS=$PWD is still supported
58 # Setting the environment variable KBUILD_EXTMOD take precedence
60 KBUILD_EXTMOD ?= $(SUBDIRS)
63 ifeq ("$(origin M)", "command line")
69 # kbuild supports saving output files in a separate directory.
70 # To locate output files in a separate directory two syntaxes are supported.
71 # In both cases the working directory must be the root of the kernel src.
73 # Use "make O=dir/to/store/output/files/"
75 # 2) Set KBUILD_OUTPUT
76 # Set the environment variable KBUILD_OUTPUT to point to the directory
77 # where the output files shall be placed.
78 # export KBUILD_OUTPUT=dir/to/store/output/files/
81 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
85 # KBUILD_SRC is set on invocation of make in OBJ directory
86 # KBUILD_SRC is not intended to be used by the regular user (for now)
89 # OK, Make called in directory where kernel src resides
90 # Do we want to locate output files in a separate directory?
92 ifeq ("$(origin O)", "command line")
97 # That's our default target when none is given on the command line
101 ifneq ($(KBUILD_OUTPUT),)
102 # Invoke a second make in the output directory, passing relevant variables
103 # check that the output directory actually exists
104 saved-output := $(KBUILD_OUTPUT)
105 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
106 $(if $(KBUILD_OUTPUT),, \
107 $(error output directory "$(saved-output)" does not exist))
109 PHONY += $(MAKECMDGOALS)
111 $(filter-out _all,$(MAKECMDGOALS)) _all:
112 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
113 KBUILD_SRC=$(CURDIR) \
114 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
116 # Leave processing to above invocation of make
118 endif # ifneq ($(KBUILD_OUTPUT),)
119 endif # ifeq ($(KBUILD_SRC),)
121 # We process the rest of the Makefile if this is the final invocation of make
122 ifeq ($(skip-makefile),)
124 # If building an external module we do not care about the all: rule
125 # but instead _all depend on modules
127 ifeq ($(KBUILD_EXTMOD),)
133 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
135 # FIXME - TOPDIR is obsolete, use srctree/objtree
140 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
142 export srctree objtree VPATH TOPDIR
145 # SUBARCH tells the usermode build what the underlying arch is. That is set
146 # first, and if a usermode build is happening, the "ARCH=um" on the command
147 # line overrides the setting of ARCH below. If a native build is happening,
148 # then ARCH is assigned, getting whatever value it gets normally, and
149 # SUBARCH is subsequently ignored.
151 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
152 -e s/arm.*/arm/ -e s/sa110/arm/ \
153 -e s/s390x/s390/ -e s/parisc64/parisc/ \
154 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
156 # Cross compiling and selecting different set of gcc/bin-utils
157 # ---------------------------------------------------------------------------
159 # When performing cross compilation for other architectures ARCH shall be set
160 # to the target architecture. (See arch/* for the possibilities).
161 # ARCH can be set during invocation of make:
163 # Another way is to have ARCH set in the environment.
164 # The default ARCH is the host where make is executed.
166 # CROSS_COMPILE specify the prefix used for all executables used
167 # during compilation. Only gcc and related bin-utils executables
168 # are prefixed with $(CROSS_COMPILE).
169 # CROSS_COMPILE can be set on the command line
170 # make CROSS_COMPILE=ia64-linux-
171 # Alternatively CROSS_COMPILE can be set in the environment.
172 # Default value for CROSS_COMPILE is not to prefix executables
173 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
178 # Architecture as present in compile.h
179 UTS_MACHINE := $(ARCH)
181 # SHELL used by kbuild
182 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
183 else if [ -x /bin/bash ]; then echo /bin/bash; \
184 else echo sh; fi ; fi)
188 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
191 # Decide whether to build built-in, modular, or both.
192 # Normally, just do built-in.
197 # If we have only "make modules", don't compile built-in objects.
198 # When we're building modules with modversions, we need to consider
199 # the built-in objects during the descend as well, in order to
200 # make sure the checksums are uptodate before we record them.
202 ifeq ($(MAKECMDGOALS),modules)
203 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
206 # If we have "make <whatever> modules", compile modules
207 # in addition to whatever we do anyway.
208 # Just "make" or "make all" shall build modules as well
210 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
214 ifeq ($(MAKECMDGOALS),)
218 export KBUILD_MODULES KBUILD_BUILTIN
219 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
222 # ---------------------------------------------------------------------------
224 # Normally, we echo the whole command before executing it. By making
225 # that echo $($(quiet)$(cmd)), we now have the possibility to set
226 # $(quiet) to choose other forms of output instead, e.g.
228 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
229 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
231 # If $(quiet) is empty, the whole command will be printed.
232 # If it is set to "quiet_", only the short version will be printed.
233 # If it is set to "silent_", nothing wil be printed at all, since
234 # the variable $(silent_cmd_cc_o_c) doesn't exist.
236 # A simple variant is to prefix commands with $(Q) - that's useful
237 # for commands that shall be hidden in non-verbose mode.
241 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
242 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
244 ifeq ($(KBUILD_VERBOSE),1)
252 # If the user is running make -s (silent mode), suppress echoing of
255 ifneq ($(findstring s,$(MAKEFLAGS)),)
259 export quiet Q KBUILD_VERBOSE
262 # Look for make include files relative to root of kernel src
263 MAKEFLAGS += --include-dir=$(srctree)
265 # We need some generic definitions
266 include $(srctree)/scripts/Kbuild.include
268 # For maximum performance (+ possibly random breakage, uncomment
273 # Make variables (CC, etc...)
275 AS = $(CROSS_COMPILE)as
276 LD = $(CROSS_COMPILE)ld
277 CC = $(CROSS_COMPILE)gcc
279 AR = $(CROSS_COMPILE)ar
280 NM = $(CROSS_COMPILE)nm
281 STRIP = $(CROSS_COMPILE)strip
282 OBJCOPY = $(CROSS_COMPILE)objcopy
283 OBJDUMP = $(CROSS_COMPILE)objdump
285 GENKSYMS = scripts/genksyms/genksyms
286 DEPMOD = /sbin/depmod
287 KALLSYMS = scripts/kallsyms
291 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
293 CFLAGS_MODULE = $(MODFLAGS)
294 AFLAGS_MODULE = $(MODFLAGS)
300 # Use LINUXINCLUDE when you must reference the include/ directory.
301 # Needed to be compatible with the O= option
302 LINUXINCLUDE := -Iinclude \
303 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
304 -include include/linux/autoconf.h
306 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
308 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
309 -fno-strict-aliasing -fno-common
310 AFLAGS := -D__ASSEMBLY__
312 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
313 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
314 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
316 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
317 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
318 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
319 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
321 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
322 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
323 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
325 # When compiling out-of-tree modules, put MODVERDIR in the module
326 # tree rather than in the kernel tree. The kernel tree might
328 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
330 # Files to ignore in find ... statements
332 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
333 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
335 # ===========================================================================
336 # Rules shared between *config targets and build targets
338 # Basic helpers built in scripts/
339 PHONY += scripts_basic
341 $(Q)$(MAKE) $(build)=scripts/basic
343 # To avoid any implicit rule to kick in, define an empty command.
344 scripts/basic/%: scripts_basic ;
346 PHONY += outputmakefile
347 # outputmakefile generates a Makefile in the output directory, if using a
348 # separate output directory. This allows convenient use of make in the
351 ifneq ($(KBUILD_SRC),)
352 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
353 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
356 # To make sure we do not include .config for any of the *config targets
357 # catch them early, and hand them over to scripts/kconfig/Makefile
358 # It is allowed to specify more targets when calling make, including
359 # mixing *config targets and build targets.
360 # For example 'make oldconfig all'.
361 # Detect when mixed targets is specified, and make a second invocation
362 # of make so .config is not included in this case either (for *config).
364 no-dot-config-targets := clean mrproper distclean \
365 cscope TAGS tags help %docs check%
371 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
372 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
377 ifeq ($(KBUILD_EXTMOD),)
378 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
380 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
386 ifeq ($(mixed-targets),1)
387 # ===========================================================================
388 # We're called with mixed targets (*config and build targets).
389 # Handle them one by one.
392 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
395 ifeq ($(config-targets),1)
396 # ===========================================================================
397 # *config targets only - make sure prerequisites are updated, and descend
398 # in scripts/kconfig to make the *config target
400 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
401 # KBUILD_DEFCONFIG may point out an alternative default configuration
402 # used for 'make defconfig'
403 include $(srctree)/arch/$(ARCH)/Makefile
404 export KBUILD_DEFCONFIG
406 config %config: scripts_basic outputmakefile FORCE
407 $(Q)mkdir -p include/linux include/config
408 $(Q)$(MAKE) $(build)=scripts/kconfig $@
411 # ===========================================================================
412 # Build targets only - this includes vmlinux, arch specific targets, clean
413 # targets and others. In general all targets except *config targets.
415 ifeq ($(KBUILD_EXTMOD),)
416 # Additional helpers built in scripts/
417 # Carefully list dependencies so we do not try to build scripts twice
420 scripts: scripts_basic include/config/auto.conf
421 $(Q)$(MAKE) $(build)=$(@)
423 # Objects we will link into vmlinux / subdirs we need to visit
425 drivers-y := drivers/ sound/
429 endif # KBUILD_EXTMOD
431 ifeq ($(dot-config),1)
432 # In this section, we need .config
434 # Read in dependencies to all Kconfig* files, make sure to run
435 # oldconfig if changes are detected.
436 -include include/config/auto.conf.cmd
437 -include include/config/auto.conf
439 # To avoid any implicit rule to kick in, define an empty command
440 .config include/config/auto.conf.cmd: ;
442 # If .config is newer than include/config/auto.conf, someone tinkered
443 # with it and forgot to run make oldconfig.
444 # if auto.conf.cmd is missing then we are probarly in a cleaned tree so
445 # we execute the config step to be sure to catch updated Kconfig files
446 include/config/auto.conf: .config include/config/auto.conf.cmd
447 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
450 # Dummy target needed, because used as prerequisite
451 include/config/auto.conf: ;
454 # The all: target is the default when no target is given on the
456 # This allow a user to issue only 'make' to build a kernel including modules
457 # Defaults vmlinux but it is usually overriden in the arch makefile
460 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
466 ifdef CONFIG_FRAME_POINTER
467 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
469 CFLAGS += -fomit-frame-pointer
472 ifdef CONFIG_UNWIND_INFO
473 CFLAGS += -fasynchronous-unwind-tables
476 ifdef CONFIG_DEBUG_INFO
480 include $(srctree)/arch/$(ARCH)/Makefile
482 # arch Makefile may override CC so keep this after arch Makefile is included
483 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
484 CHECKFLAGS += $(NOSTDINC_FLAGS)
486 # warn about C99 declaration after statement
487 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
489 # disable pointer signedness warnings in gcc 4.0
490 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
492 # Default kernel image to build when no specific target is given.
493 # KBUILD_IMAGE may be overruled on the commandline or
494 # set in the environment
495 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
497 export KBUILD_IMAGE ?= vmlinux
500 # INSTALL_PATH specifies where to place the updated kernel and system map
501 # images. Default is /boot, but you can set it to other values
502 export INSTALL_PATH ?= /boot
505 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
506 # relocations required by build roots. This is not defined in the
507 # makefile but the arguement can be passed to make if needed.
510 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
514 ifeq ($(KBUILD_EXTMOD),)
515 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
517 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
518 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
519 $(net-y) $(net-m) $(libs-y) $(libs-m)))
521 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
523 $(core-n) $(core-) $(drivers-n) $(drivers-) \
524 $(net-n) $(net-) $(libs-n) $(libs-))))
526 init-y := $(patsubst %/, %/built-in.o, $(init-y))
527 core-y := $(patsubst %/, %/built-in.o, $(core-y))
528 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
529 net-y := $(patsubst %/, %/built-in.o, $(net-y))
530 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
531 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
532 libs-y := $(libs-y1) $(libs-y2)
535 # ---------------------------------------------------------------------------
536 # vmlinux is build from the objects selected by $(vmlinux-init) and
537 # $(vmlinux-main). Most are built-in.o files from top-level directories
538 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
539 # Ordering when linking is important, and $(vmlinux-init) must be first.
544 # +-< $(vmlinux-init)
545 # | +--< init/version.o + more
547 # +--< $(vmlinux-main)
548 # | +--< driver/built-in.o mm/built-in.o + more
550 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
552 # vmlinux version (uname -v) cannot be updated during normal
553 # descending-into-subdirs phase since we do not yet know if we need to
555 # Therefore this step is delayed until just before final link of vmlinux -
556 # except in the kallsyms case where it is done just before adding the
557 # symbols to the kernel.
559 # System.map is generated to document addresses of all kernel symbols
561 vmlinux-init := $(head-y) $(init-y)
562 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
563 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
564 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
566 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
567 # May be overridden by arch/$(ARCH)/Makefile
568 quiet_cmd_vmlinux__ ?= LD $@
569 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
570 -T $(vmlinux-lds) $(vmlinux-init) \
571 --start-group $(vmlinux-main) --end-group \
572 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
574 # Generate new vmlinux version
575 quiet_cmd_vmlinux_version = GEN .version
576 cmd_vmlinux_version = set -e; \
577 if [ ! -r .version ]; then \
581 mv .version .old_version; \
582 expr 0$$(cat .old_version) + 1 >.version; \
584 $(MAKE) $(build)=init
586 # Generate System.map
587 quiet_cmd_sysmap = SYSMAP
588 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
591 # If CONFIG_KALLSYMS is set .version is already updated
592 # Generate System.map and verify that the content is consistent
593 # Use + in front of the vmlinux_version rule to silent warning with make -j2
594 # First command is ':' to allow us to use + in front of the rule
595 define rule_vmlinux__
597 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
599 $(call cmd,vmlinux__)
600 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
602 $(Q)$(if $($(quiet)cmd_sysmap), \
603 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
604 $(cmd_sysmap) $@ System.map; \
605 if [ $$? -ne 0 ]; then \
613 ifdef CONFIG_KALLSYMS
614 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
615 # It's a three stage process:
616 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
618 # Running kallsyms on that gives us .tmp_kallsyms1.o with
619 # the right size - vmlinux version (uname -v) is updated during this step
620 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
621 # but due to the added section, some addresses have shifted.
622 # From here, we generate a correct .tmp_kallsyms2.o
623 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
624 # o Verify that the System.map from vmlinux matches the map from
625 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
626 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
627 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
628 # temporary bypass to allow the kernel to be built while the
629 # maintainers work out what went wrong with kallsyms.
631 ifdef CONFIG_KALLSYMS_EXTRA_PASS
637 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
639 define verify_kallsyms
640 $(Q)$(if $($(quiet)cmd_sysmap), \
641 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
642 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
643 $(Q)cmp -s System.map .tmp_System.map || \
644 (echo Inconsistent kallsyms data; \
645 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
646 rm .tmp_kallsyms* ; /bin/false )
649 # Update vmlinux version before link
650 # Use + in front of this rule to silent warning about make -j1
651 # First command is ':' to allow us to use + in front of this rule
652 cmd_ksym_ld = $(cmd_vmlinux__)
655 +$(call cmd,vmlinux_version)
656 $(call cmd,vmlinux__)
657 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
660 # Generate .S file with all kernel symbols
661 quiet_cmd_kallsyms = KSYM $@
662 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
663 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
665 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
666 $(call if_changed_dep,as_o_S)
668 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
671 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
672 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
673 $(call if_changed_rule,ksym_ld)
675 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
676 $(call if_changed,vmlinux__)
678 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
679 $(call if_changed,vmlinux__)
681 # Needs to visit scripts/ before $(KALLSYMS) can be used.
682 $(KALLSYMS): scripts ;
684 # Generate some data for debugging strange kallsyms problems
685 debug_kallsyms: .tmp_map$(last_kallsyms)
687 .tmp_map%: .tmp_vmlinux% FORCE
688 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
694 endif # ifdef CONFIG_KALLSYMS
696 # vmlinux image - including updated kernel symbols
697 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
698 $(call if_changed_rule,vmlinux__)
699 $(Q)rm -f .old_version
701 # The actual objects are generated when descending,
702 # make sure no implicit rule kicks in
703 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
705 # Handle descending into subdirectories listed in $(vmlinux-dirs)
706 # Preset locale variables to speed up the build process. Limit locale
707 # tweaks to this spot to avoid wrong language settings when running
708 # make menuconfig etc.
709 # Error messages still appears in the original language
711 PHONY += $(vmlinux-dirs)
712 $(vmlinux-dirs): prepare scripts
713 $(Q)$(MAKE) $(build)=$@
715 # Build the kernel release string
716 # The KERNELRELEASE is stored in a file named include/config/kernel.release
717 # to be used when executing for example make install or make modules_install
719 # Take the contents of any files called localversion* and the config
720 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
721 # LOCALVERSION from the command line override all of this
724 space := $(nullstring) # end of line
726 ___localver = $(objtree)/localversion* $(srctree)/localversion*
727 __localver = $(sort $(wildcard $(___localver)))
728 # skip backup files (containing '~')
729 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
731 localver = $(subst $(space),, \
732 $(shell cat /dev/null $(_localver)) \
733 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
735 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
736 # and if the SCM is know a tag from the SCM is appended.
737 # The appended tag is determinded by the SCM used.
739 # Currently, only git is supported.
740 # Other SCMs can edit scripts/setlocalversion and add the appropriate
742 ifdef CONFIG_LOCALVERSION_AUTO
743 _localver-auto = $(shell $(CONFIG_SHELL) \
744 $(srctree)/scripts/setlocalversion $(srctree))
745 localver-auto = $(LOCALVERSION)$(_localver-auto)
748 localver-full = $(localver)$(localver-auto)
750 # Store (new) KERNELRELASE string in include/config/kernel.release
751 kernelrelease = $(KERNELVERSION)$(localver-full)
752 include/config/kernel.release: include/config/auto.conf FORCE
754 $(Q)echo $(kernelrelease) > $@
757 # Things we need to do before we recursively start building the kernel
758 # or the modules are listed in "prepare".
759 # A multi level approach is used. prepareN is processed before prepareN-1.
760 # archprepare is used in arch Makefiles and when processed asm symlink,
761 # version.h and scripts_basic is processed / created.
763 # Listed in dependency order
764 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
766 # prepare-all is deprecated, use prepare as valid replacement
769 # prepare3 is used to check if we are building in a separate output directory,
771 # 1) Check that make has not been executed in the kernel src $(srctree)
772 # 2) Create the include2 directory, used for the second asm symlink
773 prepare3: include/config/kernel.release
774 ifneq ($(KBUILD_SRC),)
775 @echo ' Using $(srctree) as source for kernel'
776 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
777 echo " $(srctree) is not clean, please run 'make mrproper'";\
778 echo " in the '$(srctree)' directory.";\
781 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
782 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
785 # prepare2 creates a makefile if using a separate output directory
786 prepare2: prepare3 outputmakefile
788 prepare1: prepare2 include/linux/version.h include/asm \
789 include/config/auto.conf
790 ifneq ($(KBUILD_MODULES),)
791 $(Q)mkdir -p $(MODVERDIR)
792 $(Q)rm -f $(MODVERDIR)/*
795 archprepare: prepare1 scripts_basic
797 prepare0: archprepare FORCE
798 $(Q)$(MAKE) $(build)=.
800 # All the preparing..
801 prepare prepare-all: prepare0
803 # Leave this as default for preprocessing vmlinux.lds.S, which is now
804 # done in arch/$(ARCH)/kernel/Makefile
806 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
808 # FIXME: The asm symlink changes when $(ARCH) changes. That's
809 # hard to detect, but I suppose "make mrproper" is a good idea
810 # before switching between archs anyway.
813 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
814 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
815 @ln -fsn asm-$(ARCH) $@
817 # Generate some files
818 # ---------------------------------------------------------------------------
820 # KERNELRELEASE can change from a few different places, meaning version.h
821 # needs to be updated, so this check is forced on all builds
825 define filechk_version.h
826 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
827 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
830 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
831 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
832 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
836 include/linux/version.h: $(srctree)/Makefile include/config/kernel.release FORCE
837 $(call filechk,version.h)
839 # ---------------------------------------------------------------------------
843 @echo '*** Warning: make $@ is unnecessary now.'
845 # ---------------------------------------------------------------------------
850 # By default, build modules as well
857 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
858 @echo ' Building modules, stage 2.';
859 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
862 # Target to prepare building external modules
863 PHONY += modules_prepare
864 modules_prepare: prepare scripts
866 # Target to install modules
867 PHONY += modules_install
868 modules_install: _modinst_ _modinst_post
872 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
873 echo "Warning: you may need to install module-init-tools"; \
874 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
877 @rm -rf $(MODLIB)/kernel
878 @rm -f $(MODLIB)/source
879 @mkdir -p $(MODLIB)/kernel
880 @ln -s $(srctree) $(MODLIB)/source
881 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
882 rm -f $(MODLIB)/build ; \
883 ln -s $(objtree) $(MODLIB)/build ; \
885 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
887 # If System.map exists, run depmod. This deliberately does not have a
888 # dependency on System.map since that would run the dependency tree on
889 # vmlinux. This depmod is only for convenience to give the initial
890 # boot a modules.dep even before / is mounted read-write. However the
891 # boot script depmod is the master version.
892 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
895 depmod_opts := -b $(INSTALL_MOD_PATH) -r
897 PHONY += _modinst_post
898 _modinst_post: _modinst_
899 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
901 else # CONFIG_MODULES
903 # Modules not configured
904 # ---------------------------------------------------------------------------
906 modules modules_install: FORCE
908 @echo "The present kernel configuration has modules disabled."
909 @echo "Type 'make config' and enable loadable module support."
910 @echo "Then build a kernel with module support enabled."
914 endif # CONFIG_MODULES
917 # Cleaning is done on three levels.
918 # make clean Delete most generated files
919 # Leave enough to build external modules
920 # make mrproper Delete the current configuration, and all generated files
921 # make distclean Remove editor backup files, patch leftover files and the like
923 # Directories & files removed with 'make clean'
924 CLEAN_DIRS += $(MODVERDIR)
925 CLEAN_FILES += vmlinux System.map \
926 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
928 # Directories & files removed with 'make mrproper'
929 MRPROPER_DIRS += include/config include2
930 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
931 include/linux/autoconf.h include/linux/version.h \
932 Module.symvers tags TAGS cscope*
934 # clean - Delete most, but leave enough to build external modules
936 clean: rm-dirs := $(CLEAN_DIRS)
937 clean: rm-files := $(CLEAN_FILES)
938 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
940 PHONY += $(clean-dirs) clean archclean
942 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
944 clean: archclean $(clean-dirs)
947 @find . $(RCS_FIND_IGNORE) \
948 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
949 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
950 -type f -print | xargs rm -f
952 # mrproper - Delete all generated files, including .config
954 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
955 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
956 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
958 PHONY += $(mrproper-dirs) mrproper archmrproper
960 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
962 mrproper: clean archmrproper $(mrproper-dirs)
971 @find $(srctree) $(RCS_FIND_IGNORE) \
972 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
973 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
974 -o -name '.*.rej' -o -size 0 \
975 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
976 -type f -print | xargs rm -f
979 # Packaging of the kernel to various formats
980 # ---------------------------------------------------------------------------
981 # rpm target kept for backward compatibility
982 package-dir := $(srctree)/scripts/package
985 $(Q)$(MAKE) $(build)=$(package-dir) $@
987 $(Q)$(MAKE) $(build)=$(package-dir) $@
990 # Brief documentation of the typical targets used
991 # ---------------------------------------------------------------------------
993 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
994 boards := $(notdir $(boards))
997 @echo 'Cleaning targets:'
998 @echo ' clean - remove most generated files but keep the config'
999 @echo ' mrproper - remove all generated files + config + various backup files'
1001 @echo 'Configuration targets:'
1002 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1004 @echo 'Other generic targets:'
1005 @echo ' all - Build all targets marked with [*]'
1006 @echo '* vmlinux - Build the bare kernel'
1007 @echo '* modules - Build all modules'
1008 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1009 @echo ' dir/ - Build all files in dir and below'
1010 @echo ' dir/file.[ois] - Build specified target only'
1011 @echo ' dir/file.ko - Build module including final link'
1012 @echo ' rpm - Build a kernel as an RPM package'
1013 @echo ' tags/TAGS - Generate tags file for editors'
1014 @echo ' cscope - Generate cscope index'
1015 @echo ' kernelrelease - Output the release version string'
1016 @echo ' kernelversion - Output the version stored in Makefile'
1018 @echo 'Static analysers'
1019 @echo ' checkstack - Generate a list of stack hogs'
1020 @echo ' namespacecheck - Name space analysis on compiled kernel'
1022 @echo 'Kernel packaging:'
1023 @$(MAKE) $(build)=$(package-dir) help
1025 @echo 'Documentation targets:'
1026 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1028 @echo 'Architecture specific targets ($(ARCH)):'
1029 @$(if $(archhelp),$(archhelp),\
1030 echo ' No architecture specific help defined for $(ARCH)')
1033 $(foreach b, $(boards), \
1034 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1037 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1038 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1039 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1040 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1042 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1043 @echo 'For further info see the ./README file'
1046 # Documentation targets
1047 # ---------------------------------------------------------------------------
1048 %docs: scripts_basic FORCE
1049 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1051 else # KBUILD_EXTMOD
1054 # External module support.
1055 # When building external modules the kernel used as basis is considered
1056 # read-only, and no consistency checks are made and the make
1057 # system is not used on the basis kernel. If updates are required
1058 # in the basis kernel ordinary make commands (without M=...) must
1061 # The following are the only valid targets when building external
1063 # make M=dir clean Delete all automatically generated files
1064 # make M=dir modules Make all modules in specified dir
1065 # make M=dir Same as 'make M=dir modules'
1066 # make M=dir modules_install
1067 # Install the modules build in the module directory
1068 # Assumes install directory is already created
1070 # We are always building modules
1072 PHONY += crmodverdir
1074 $(Q)mkdir -p $(MODVERDIR)
1075 $(Q)rm -f $(MODVERDIR)/*
1077 PHONY += $(objtree)/Module.symvers
1078 $(objtree)/Module.symvers:
1079 @test -e $(objtree)/Module.symvers || ( \
1081 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1082 echo " is missing; modules will have no dependencies and modversions."; \
1085 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1086 PHONY += $(module-dirs) modules
1087 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1088 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1090 modules: $(module-dirs)
1091 @echo ' Building modules, stage 2.';
1092 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1094 PHONY += modules_install
1095 modules_install: _emodinst_ _emodinst_post
1097 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1100 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1101 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1103 # Run depmod only is we have System.map and depmod is executable
1104 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1105 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1106 $(DEPMOD) -ae -F System.map \
1107 $(if $(strip $(INSTALL_MOD_PATH)), \
1108 -b $(INSTALL_MOD_PATH) -r) \
1112 PHONY += _emodinst_post
1113 _emodinst_post: _emodinst_
1116 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1118 PHONY += $(clean-dirs) clean
1120 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1122 clean: rm-dirs := $(MODVERDIR)
1123 clean: $(clean-dirs)
1125 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1126 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1127 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1128 -type f -print | xargs rm -f
1131 @echo ' Building external modules.'
1132 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1134 @echo ' modules - default target, build the module(s)'
1135 @echo ' modules_install - install the module'
1136 @echo ' clean - remove generated files in module directory only'
1140 PHONY += prepare scripts
1143 endif # KBUILD_EXTMOD
1145 # Generate tags for editors
1146 # ---------------------------------------------------------------------------
1148 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1149 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1150 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1152 ifeq ($(src),$(obj))
1155 __srctree = $(srctree)/
1158 ifeq ($(ALLSOURCE_ARCHS),)
1160 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1162 ALLINCLUDE_ARCHS := $(ARCH)
1165 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1166 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1169 ALLSOURCE_ARCHS := $(ARCH)
1172 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1173 \( -name include -o -name arch \) -prune -o \
1174 -name '*.[chS]' -print; \
1175 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1176 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1177 -name '*.[chS]' -print; \
1179 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1180 -name '*.[chS]' -print; \
1181 find $(__srctree)include $(RCS_FIND_IGNORE) \
1182 \( -name config -o -name 'asm-*' \) -prune \
1183 -o -name '*.[chS]' -print; \
1184 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1185 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1186 -name '*.[chS]' -print; \
1188 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1189 -name '*.[chS]' -print )
1192 quiet_cmd_cscope-file = FILELST cscope.files
1193 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1195 quiet_cmd_cscope = MAKE cscope.out
1196 cmd_cscope = cscope -b
1199 $(call cmd,cscope-file)
1202 quiet_cmd_TAGS = MAKE $@
1205 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1206 echo "-I __initdata,__exitdata,__acquires,__releases \
1207 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1208 --extra=+f --c-kinds=+px"`; \
1209 $(all-sources) | xargs etags $$ETAGSF -a
1216 quiet_cmd_tags = MAKE $@
1219 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1220 echo "-I __initdata,__exitdata,__acquires,__releases \
1221 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1222 --extra=+f --c-kinds=+px"`; \
1223 $(all-sources) | xargs ctags $$CTAGSF -a
1230 # Scripts to check various things for consistency
1231 # ---------------------------------------------------------------------------
1234 find * $(RCS_FIND_IGNORE) \
1235 -name '*.[hcS]' -type f -print | sort \
1236 | xargs $(PERL) -w scripts/checkincludes.pl
1239 find * $(RCS_FIND_IGNORE) \
1240 -name '*.[hcS]' -type f -print | sort \
1241 | xargs $(PERL) -w scripts/checkversion.pl
1244 $(PERL) $(srctree)/scripts/namespace.pl
1246 endif #ifeq ($(config-targets),1)
1247 endif #ifeq ($(mixed-targets),1)
1251 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1252 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1255 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1256 $(error kernelrelease not valid - run 'make prepare' to update it))
1258 @echo $(KERNELVERSION)
1261 # ---------------------------------------------------------------------------
1262 # Single targets are compatible with:
1263 # - build whith mixed source and output
1264 # - build with separate output dir 'make O=...'
1265 # - external modules
1267 # target-dir => where to store outputfile
1268 # build-dir => directory in kernel source tree to use
1270 ifeq ($(KBUILD_EXTMOD),)
1271 build-dir = $(patsubst %/,%,$(dir $@))
1272 target-dir = $(dir $@)
1274 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1275 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1276 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1279 %.s: %.c prepare scripts FORCE
1280 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1281 %.i: %.c prepare scripts FORCE
1282 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1283 %.o: %.c prepare scripts FORCE
1284 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1285 %.lst: %.c prepare scripts FORCE
1286 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1287 %.s: %.S prepare scripts FORCE
1288 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1289 %.o: %.S prepare scripts FORCE
1290 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1293 / %/: prepare scripts FORCE
1294 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1295 $(build)=$(build-dir)
1296 %.ko: prepare scripts FORCE
1297 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1298 $(build)=$(build-dir) $(@:.ko=.o)
1299 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1301 # FIXME Should go into a make.lib or something
1302 # ===========================================================================
1304 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1305 cmd_rmdirs = rm -rf $(rm-dirs)
1307 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1308 cmd_rmfiles = rm -f $(rm-files)
1311 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1312 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1313 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1315 quiet_cmd_as_o_S = AS $@
1316 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1318 # read all saved command lines
1320 targets := $(wildcard $(sort $(targets)))
1321 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1323 ifneq ($(cmd_files),)
1324 $(cmd_files): ; # Do not try to update included dependency files
1325 include $(cmd_files)
1328 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1330 # $(Q)$(MAKE) $(clean)=dir
1331 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1333 endif # skip-makefile
1339 # Declare the contents of the .PHONY variable as phony. We keep that
1340 # information in a variable se we can use it in if_changed and friends.