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 .kernelrelease (if it exists)
313 KERNELRELEASE = $(shell cat .kernelrelease 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
408 $(Q)$(MAKE) $(build)=scripts/kconfig $@
409 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
412 # ===========================================================================
413 # Build targets only - this includes vmlinux, arch specific targets, clean
414 # targets and others. In general all targets except *config targets.
416 ifeq ($(KBUILD_EXTMOD),)
417 # Additional helpers built in scripts/
418 # Carefully list dependencies so we do not try to build scripts twice
421 scripts: scripts_basic include/config/MARKER
422 $(Q)$(MAKE) $(build)=$(@)
424 scripts_basic: include/linux/autoconf.h
426 # Objects we will link into vmlinux / subdirs we need to visit
428 drivers-y := drivers/ sound/
432 endif # KBUILD_EXTMOD
434 ifeq ($(dot-config),1)
435 # In this section, we need .config
437 # Read in dependencies to all Kconfig* files, make sure to run
438 # oldconfig if changes are detected.
443 # If .config needs to be updated, it will be done via the dependency
444 # that autoconf has on .config.
445 # To avoid any implicit rule to kick in, define an empty command
446 .config .kconfig.d: ;
448 # If .config is newer than include/linux/autoconf.h, someone tinkered
449 # with it and forgot to run make oldconfig.
450 # If kconfig.d is missing then we are probarly in a cleaned tree so
451 # we execute the config step to be sure to catch updated Kconfig files
452 include/linux/autoconf.h: .kconfig.d .config
453 $(Q)mkdir -p include/linux
454 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
456 # Dummy target needed, because used as prerequisite
457 include/linux/autoconf.h: ;
460 # The all: target is the default when no target is given on the
462 # This allow a user to issue only 'make' to build a kernel including modules
463 # Defaults vmlinux but it is usually overriden in the arch makefile
466 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
472 ifdef CONFIG_FRAME_POINTER
473 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
475 CFLAGS += -fomit-frame-pointer
478 ifdef CONFIG_UNWIND_INFO
479 CFLAGS += -fasynchronous-unwind-tables
482 ifdef CONFIG_DEBUG_INFO
486 include $(srctree)/arch/$(ARCH)/Makefile
488 # arch Makefile may override CC so keep this after arch Makefile is included
489 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
490 CHECKFLAGS += $(NOSTDINC_FLAGS)
492 # warn about C99 declaration after statement
493 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
495 # disable pointer signedness warnings in gcc 4.0
496 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
498 # Default kernel image to build when no specific target is given.
499 # KBUILD_IMAGE may be overruled on the commandline or
500 # set in the environment
501 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
503 export KBUILD_IMAGE ?= vmlinux
506 # INSTALL_PATH specifies where to place the updated kernel and system map
507 # images. Default is /boot, but you can set it to other values
508 export INSTALL_PATH ?= /boot
511 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
512 # relocations required by build roots. This is not defined in the
513 # makefile but the arguement can be passed to make if needed.
516 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
520 ifeq ($(KBUILD_EXTMOD),)
521 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
523 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
524 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
525 $(net-y) $(net-m) $(libs-y) $(libs-m)))
527 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
529 $(core-n) $(core-) $(drivers-n) $(drivers-) \
530 $(net-n) $(net-) $(libs-n) $(libs-))))
532 init-y := $(patsubst %/, %/built-in.o, $(init-y))
533 core-y := $(patsubst %/, %/built-in.o, $(core-y))
534 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
535 net-y := $(patsubst %/, %/built-in.o, $(net-y))
536 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
537 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
538 libs-y := $(libs-y1) $(libs-y2)
541 # ---------------------------------------------------------------------------
542 # vmlinux is build from the objects selected by $(vmlinux-init) and
543 # $(vmlinux-main). Most are built-in.o files from top-level directories
544 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
545 # Ordering when linking is important, and $(vmlinux-init) must be first.
550 # +-< $(vmlinux-init)
551 # | +--< init/version.o + more
553 # +--< $(vmlinux-main)
554 # | +--< driver/built-in.o mm/built-in.o + more
556 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
558 # vmlinux version (uname -v) cannot be updated during normal
559 # descending-into-subdirs phase since we do not yet know if we need to
561 # Therefore this step is delayed until just before final link of vmlinux -
562 # except in the kallsyms case where it is done just before adding the
563 # symbols to the kernel.
565 # System.map is generated to document addresses of all kernel symbols
567 vmlinux-init := $(head-y) $(init-y)
568 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
569 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
570 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
572 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
573 # May be overridden by arch/$(ARCH)/Makefile
574 quiet_cmd_vmlinux__ ?= LD $@
575 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
576 -T $(vmlinux-lds) $(vmlinux-init) \
577 --start-group $(vmlinux-main) --end-group \
578 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
580 # Generate new vmlinux version
581 quiet_cmd_vmlinux_version = GEN .version
582 cmd_vmlinux_version = set -e; \
583 if [ ! -r .version ]; then \
587 mv .version .old_version; \
588 expr 0$$(cat .old_version) + 1 >.version; \
590 $(MAKE) $(build)=init
592 # Generate System.map
593 quiet_cmd_sysmap = SYSMAP
594 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
597 # If CONFIG_KALLSYMS is set .version is already updated
598 # Generate System.map and verify that the content is consistent
599 # Use + in front of the vmlinux_version rule to silent warning with make -j2
600 # First command is ':' to allow us to use + in front of the rule
601 define rule_vmlinux__
603 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
605 $(call cmd,vmlinux__)
606 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
608 $(Q)$(if $($(quiet)cmd_sysmap), \
609 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
610 $(cmd_sysmap) $@ System.map; \
611 if [ $$? -ne 0 ]; then \
619 ifdef CONFIG_KALLSYMS
620 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
621 # It's a three stage process:
622 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
624 # Running kallsyms on that gives us .tmp_kallsyms1.o with
625 # the right size - vmlinux version (uname -v) is updated during this step
626 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
627 # but due to the added section, some addresses have shifted.
628 # From here, we generate a correct .tmp_kallsyms2.o
629 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
630 # o Verify that the System.map from vmlinux matches the map from
631 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
632 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
633 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
634 # temporary bypass to allow the kernel to be built while the
635 # maintainers work out what went wrong with kallsyms.
637 ifdef CONFIG_KALLSYMS_EXTRA_PASS
643 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
645 define verify_kallsyms
646 $(Q)$(if $($(quiet)cmd_sysmap), \
647 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
648 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
649 $(Q)cmp -s System.map .tmp_System.map || \
650 (echo Inconsistent kallsyms data; \
651 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
652 rm .tmp_kallsyms* ; /bin/false )
655 # Update vmlinux version before link
656 # Use + in front of this rule to silent warning about make -j1
657 # First command is ':' to allow us to use + in front of this rule
658 cmd_ksym_ld = $(cmd_vmlinux__)
661 +$(call cmd,vmlinux_version)
662 $(call cmd,vmlinux__)
663 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
666 # Generate .S file with all kernel symbols
667 quiet_cmd_kallsyms = KSYM $@
668 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
669 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
671 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
672 $(call if_changed_dep,as_o_S)
674 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
677 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
678 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
679 $(call if_changed_rule,ksym_ld)
681 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
682 $(call if_changed,vmlinux__)
684 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
685 $(call if_changed,vmlinux__)
687 # Needs to visit scripts/ before $(KALLSYMS) can be used.
688 $(KALLSYMS): scripts ;
690 # Generate some data for debugging strange kallsyms problems
691 debug_kallsyms: .tmp_map$(last_kallsyms)
693 .tmp_map%: .tmp_vmlinux% FORCE
694 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
700 endif # ifdef CONFIG_KALLSYMS
702 # vmlinux image - including updated kernel symbols
703 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
704 $(call if_changed_rule,vmlinux__)
705 $(Q)rm -f .old_version
707 # The actual objects are generated when descending,
708 # make sure no implicit rule kicks in
709 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
711 # Handle descending into subdirectories listed in $(vmlinux-dirs)
712 # Preset locale variables to speed up the build process. Limit locale
713 # tweaks to this spot to avoid wrong language settings when running
714 # make menuconfig etc.
715 # Error messages still appears in the original language
717 PHONY += $(vmlinux-dirs)
718 $(vmlinux-dirs): prepare scripts
719 $(Q)$(MAKE) $(build)=$@
721 # Build the kernel release string
722 # The KERNELRELEASE is stored in a file named .kernelrelease
723 # to be used when executing for example make install or make modules_install
725 # Take the contents of any files called localversion* and the config
726 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
727 # LOCALVERSION from the command line override all of this
730 space := $(nullstring) # end of line
732 ___localver = $(objtree)/localversion* $(srctree)/localversion*
733 __localver = $(sort $(wildcard $(___localver)))
734 # skip backup files (containing '~')
735 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
737 localver = $(subst $(space),, \
738 $(shell cat /dev/null $(_localver)) \
739 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
741 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
742 # and if the SCM is know a tag from the SCM is appended.
743 # The appended tag is determinded by the SCM used.
745 # Currently, only git is supported.
746 # Other SCMs can edit scripts/setlocalversion and add the appropriate
748 ifdef CONFIG_LOCALVERSION_AUTO
749 _localver-auto = $(shell $(CONFIG_SHELL) \
750 $(srctree)/scripts/setlocalversion $(srctree))
751 localver-auto = $(LOCALVERSION)$(_localver-auto)
754 localver-full = $(localver)$(localver-auto)
756 # Store (new) KERNELRELASE string in .kernelrelease
757 kernelrelease = $(KERNELVERSION)$(localver-full)
758 .kernelrelease: FORCE
760 $(Q)echo $(kernelrelease) > $@
763 # Things we need to do before we recursively start building the kernel
764 # or the modules are listed in "prepare".
765 # A multi level approach is used. prepareN is processed before prepareN-1.
766 # archprepare is used in arch Makefiles and when processed asm symlink,
767 # version.h and scripts_basic is processed / created.
769 # Listed in dependency order
770 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
772 # prepare-all is deprecated, use prepare as valid replacement
775 # prepare3 is used to check if we are building in a separate output directory,
777 # 1) Check that make has not been executed in the kernel src $(srctree)
778 # 2) Create the include2 directory, used for the second asm symlink
779 prepare3: .kernelrelease
780 ifneq ($(KBUILD_SRC),)
781 @echo ' Using $(srctree) as source for kernel'
782 $(Q)if [ -f $(srctree)/.config ]; then \
783 echo " $(srctree) is not clean, please run 'make mrproper'";\
784 echo " in the '$(srctree)' directory.";\
787 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
788 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
791 # prepare2 creates a makefile if using a separate output directory
792 prepare2: prepare3 outputmakefile
794 prepare1: prepare2 include/linux/version.h include/asm \
795 include/config/MARKER
796 ifneq ($(KBUILD_MODULES),)
797 $(Q)mkdir -p $(MODVERDIR)
798 $(Q)rm -f $(MODVERDIR)/*
801 archprepare: prepare1 scripts_basic
803 prepare0: archprepare FORCE
804 $(Q)$(MAKE) $(build)=.
806 # All the preparing..
807 prepare prepare-all: prepare0
809 # Leave this as default for preprocessing vmlinux.lds.S, which is now
810 # done in arch/$(ARCH)/kernel/Makefile
812 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
814 # FIXME: The asm symlink changes when $(ARCH) changes. That's
815 # hard to detect, but I suppose "make mrproper" is a good idea
816 # before switching between archs anyway.
819 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
820 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
821 @ln -fsn asm-$(ARCH) $@
823 # Split autoconf.h into include/linux/config/*
825 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
826 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
827 @scripts/basic/split-include include/linux/autoconf.h include/config
830 # Generate some files
831 # ---------------------------------------------------------------------------
833 # KERNELRELEASE can change from a few different places, meaning version.h
834 # needs to be updated, so this check is forced on all builds
838 define filechk_version.h
839 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
840 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
843 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
844 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
845 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
849 include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
850 $(call filechk,version.h)
852 # ---------------------------------------------------------------------------
856 @echo '*** Warning: make $@ is unnecessary now.'
858 # ---------------------------------------------------------------------------
863 # By default, build modules as well
870 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
871 @echo ' Building modules, stage 2.';
872 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
875 # Target to prepare building external modules
876 PHONY += modules_prepare
877 modules_prepare: prepare scripts
879 # Target to install modules
880 PHONY += modules_install
881 modules_install: _modinst_ _modinst_post
885 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
886 echo "Warning: you may need to install module-init-tools"; \
887 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
890 @rm -rf $(MODLIB)/kernel
891 @rm -f $(MODLIB)/source
892 @mkdir -p $(MODLIB)/kernel
893 @ln -s $(srctree) $(MODLIB)/source
894 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
895 rm -f $(MODLIB)/build ; \
896 ln -s $(objtree) $(MODLIB)/build ; \
898 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
900 # If System.map exists, run depmod. This deliberately does not have a
901 # dependency on System.map since that would run the dependency tree on
902 # vmlinux. This depmod is only for convenience to give the initial
903 # boot a modules.dep even before / is mounted read-write. However the
904 # boot script depmod is the master version.
905 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
908 depmod_opts := -b $(INSTALL_MOD_PATH) -r
910 PHONY += _modinst_post
911 _modinst_post: _modinst_
912 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
914 else # CONFIG_MODULES
916 # Modules not configured
917 # ---------------------------------------------------------------------------
919 modules modules_install: FORCE
921 @echo "The present kernel configuration has modules disabled."
922 @echo "Type 'make config' and enable loadable module support."
923 @echo "Then build a kernel with module support enabled."
927 endif # CONFIG_MODULES
930 # Cleaning is done on three levels.
931 # make clean Delete most generated files
932 # Leave enough to build external modules
933 # make mrproper Delete the current configuration, and all generated files
934 # make distclean Remove editor backup files, patch leftover files and the like
936 # Directories & files removed with 'make clean'
937 CLEAN_DIRS += $(MODVERDIR)
938 CLEAN_FILES += vmlinux System.map \
939 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
941 # Directories & files removed with 'make mrproper'
942 MRPROPER_DIRS += include/config include2
943 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
944 include/linux/autoconf.h include/linux/version.h \
945 .kernelrelease Module.symvers tags TAGS cscope*
947 # clean - Delete most, but leave enough to build external modules
949 clean: rm-dirs := $(CLEAN_DIRS)
950 clean: rm-files := $(CLEAN_FILES)
951 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
953 PHONY += $(clean-dirs) clean archclean
955 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
957 clean: archclean $(clean-dirs)
960 @find . $(RCS_FIND_IGNORE) \
961 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
962 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
963 -type f -print | xargs rm -f
965 # mrproper - Delete all generated files, including .config
967 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
968 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
969 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
971 PHONY += $(mrproper-dirs) mrproper archmrproper
973 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
975 mrproper: clean archmrproper $(mrproper-dirs)
984 @find $(srctree) $(RCS_FIND_IGNORE) \
985 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
986 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
987 -o -name '.*.rej' -o -size 0 \
988 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
989 -type f -print | xargs rm -f
992 # Packaging of the kernel to various formats
993 # ---------------------------------------------------------------------------
994 # rpm target kept for backward compatibility
995 package-dir := $(srctree)/scripts/package
998 $(Q)$(MAKE) $(build)=$(package-dir) $@
1000 $(Q)$(MAKE) $(build)=$(package-dir) $@
1003 # Brief documentation of the typical targets used
1004 # ---------------------------------------------------------------------------
1006 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1007 boards := $(notdir $(boards))
1010 @echo 'Cleaning targets:'
1011 @echo ' clean - remove most generated files but keep the config'
1012 @echo ' mrproper - remove all generated files + config + various backup files'
1014 @echo 'Configuration targets:'
1015 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1017 @echo 'Other generic targets:'
1018 @echo ' all - Build all targets marked with [*]'
1019 @echo '* vmlinux - Build the bare kernel'
1020 @echo '* modules - Build all modules'
1021 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1022 @echo ' dir/ - Build all files in dir and below'
1023 @echo ' dir/file.[ois] - Build specified target only'
1024 @echo ' dir/file.ko - Build module including final link'
1025 @echo ' rpm - Build a kernel as an RPM package'
1026 @echo ' tags/TAGS - Generate tags file for editors'
1027 @echo ' cscope - Generate cscope index'
1028 @echo ' kernelrelease - Output the release version string'
1029 @echo ' kernelversion - Output the version stored in Makefile'
1031 @echo 'Static analysers'
1032 @echo ' checkstack - Generate a list of stack hogs'
1033 @echo ' namespacecheck - Name space analysis on compiled kernel'
1035 @echo 'Kernel packaging:'
1036 @$(MAKE) $(build)=$(package-dir) help
1038 @echo 'Documentation targets:'
1039 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1041 @echo 'Architecture specific targets ($(ARCH)):'
1042 @$(if $(archhelp),$(archhelp),\
1043 echo ' No architecture specific help defined for $(ARCH)')
1046 $(foreach b, $(boards), \
1047 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1050 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1051 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1052 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1053 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1055 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1056 @echo 'For further info see the ./README file'
1059 # Documentation targets
1060 # ---------------------------------------------------------------------------
1061 %docs: scripts_basic FORCE
1062 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1064 else # KBUILD_EXTMOD
1067 # External module support.
1068 # When building external modules the kernel used as basis is considered
1069 # read-only, and no consistency checks are made and the make
1070 # system is not used on the basis kernel. If updates are required
1071 # in the basis kernel ordinary make commands (without M=...) must
1074 # The following are the only valid targets when building external
1076 # make M=dir clean Delete all automatically generated files
1077 # make M=dir modules Make all modules in specified dir
1078 # make M=dir Same as 'make M=dir modules'
1079 # make M=dir modules_install
1080 # Install the modules build in the module directory
1081 # Assumes install directory is already created
1083 # We are always building modules
1085 PHONY += crmodverdir
1087 $(Q)mkdir -p $(MODVERDIR)
1088 $(Q)rm -f $(MODVERDIR)/*
1090 PHONY += $(objtree)/Module.symvers
1091 $(objtree)/Module.symvers:
1092 @test -e $(objtree)/Module.symvers || ( \
1094 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1095 echo " is missing; modules will have no dependencies and modversions."; \
1098 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1099 PHONY += $(module-dirs) modules
1100 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1101 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1103 modules: $(module-dirs)
1104 @echo ' Building modules, stage 2.';
1105 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1107 PHONY += modules_install
1108 modules_install: _emodinst_ _emodinst_post
1110 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1113 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1114 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1116 # Run depmod only is we have System.map and depmod is executable
1117 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1118 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1119 $(DEPMOD) -ae -F System.map \
1120 $(if $(strip $(INSTALL_MOD_PATH)), \
1121 -b $(INSTALL_MOD_PATH) -r) \
1125 PHONY += _emodinst_post
1126 _emodinst_post: _emodinst_
1129 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1131 PHONY += $(clean-dirs) clean
1133 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1135 clean: rm-dirs := $(MODVERDIR)
1136 clean: $(clean-dirs)
1138 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1139 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1140 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1141 -type f -print | xargs rm -f
1144 @echo ' Building external modules.'
1145 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1147 @echo ' modules - default target, build the module(s)'
1148 @echo ' modules_install - install the module'
1149 @echo ' clean - remove generated files in module directory only'
1153 PHONY += prepare scripts
1156 endif # KBUILD_EXTMOD
1158 # Generate tags for editors
1159 # ---------------------------------------------------------------------------
1161 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1162 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1163 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1165 ifeq ($(src),$(obj))
1168 __srctree = $(srctree)/
1171 ifeq ($(ALLSOURCE_ARCHS),)
1173 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1175 ALLINCLUDE_ARCHS := $(ARCH)
1178 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1179 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1182 ALLSOURCE_ARCHS := $(ARCH)
1185 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1186 \( -name include -o -name arch \) -prune -o \
1187 -name '*.[chS]' -print; \
1188 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1189 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1190 -name '*.[chS]' -print; \
1192 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1193 -name '*.[chS]' -print; \
1194 find $(__srctree)include $(RCS_FIND_IGNORE) \
1195 \( -name config -o -name 'asm-*' \) -prune \
1196 -o -name '*.[chS]' -print; \
1197 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1198 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1199 -name '*.[chS]' -print; \
1201 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1202 -name '*.[chS]' -print )
1205 quiet_cmd_cscope-file = FILELST cscope.files
1206 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1208 quiet_cmd_cscope = MAKE cscope.out
1209 cmd_cscope = cscope -b
1212 $(call cmd,cscope-file)
1215 quiet_cmd_TAGS = MAKE $@
1218 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1219 echo "-I __initdata,__exitdata,__acquires,__releases \
1220 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1221 --extra=+f --c-kinds=+px"`; \
1222 $(all-sources) | xargs etags $$ETAGSF -a
1229 quiet_cmd_tags = MAKE $@
1232 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1233 echo "-I __initdata,__exitdata,__acquires,__releases \
1234 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1235 --extra=+f --c-kinds=+px"`; \
1236 $(all-sources) | xargs ctags $$CTAGSF -a
1243 # Scripts to check various things for consistency
1244 # ---------------------------------------------------------------------------
1247 find * $(RCS_FIND_IGNORE) \
1248 -name '*.[hcS]' -type f -print | sort \
1249 | xargs $(PERL) -w scripts/checkincludes.pl
1252 find * $(RCS_FIND_IGNORE) \
1253 -name '*.[hcS]' -type f -print | sort \
1254 | xargs $(PERL) -w scripts/checkversion.pl
1257 $(PERL) $(srctree)/scripts/namespace.pl
1259 endif #ifeq ($(config-targets),1)
1260 endif #ifeq ($(mixed-targets),1)
1264 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1265 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1268 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1269 $(error kernelrelease not valid - run 'make *config' to update it))
1271 @echo $(KERNELVERSION)
1274 # ---------------------------------------------------------------------------
1275 # Single targets are compatible with:
1276 # - build whith mixed source and output
1277 # - build with separate output dir 'make O=...'
1278 # - external modules
1280 # target-dir => where to store outputfile
1281 # build-dir => directory in kernel source tree to use
1283 ifeq ($(KBUILD_EXTMOD),)
1284 build-dir = $(patsubst %/,%,$(dir $@))
1285 target-dir = $(dir $@)
1287 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1288 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1289 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1292 %.s: %.c prepare scripts FORCE
1293 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1294 %.i: %.c prepare scripts FORCE
1295 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1296 %.o: %.c prepare scripts FORCE
1297 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1298 %.lst: %.c prepare scripts FORCE
1299 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1300 %.s: %.S prepare scripts FORCE
1301 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1302 %.o: %.S prepare scripts FORCE
1303 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1306 / %/: prepare scripts FORCE
1307 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1308 $(build)=$(build-dir)
1309 %.ko: prepare scripts FORCE
1310 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1311 $(build)=$(build-dir) $(@:.ko=.o)
1312 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1314 # FIXME Should go into a make.lib or something
1315 # ===========================================================================
1317 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1318 cmd_rmdirs = rm -rf $(rm-dirs)
1320 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1321 cmd_rmfiles = rm -f $(rm-files)
1324 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1325 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1326 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1328 quiet_cmd_as_o_S = AS $@
1329 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1331 # read all saved command lines
1333 targets := $(wildcard $(sort $(targets)))
1334 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1336 ifneq ($(cmd_files),)
1337 $(cmd_files): ; # Do not try to update included dependency files
1338 include $(cmd_files)
1341 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1343 # $(Q)$(MAKE) $(clean)=dir
1344 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1346 endif # skip-makefile
1352 # Declare the contents of the .PHONY variable as phony. We keep that
1353 # information in a variable se we can use it in if_changed and friends.