5 NAME=Sliding Snow Leopard
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
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/ppc64/powerpc/ )
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 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
263 # See documentation in Documentation/kbuild/makefiles.txt
266 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
268 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
269 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
272 # Usage: flag := $(call cc-option-yn, -march=winchip-c6)
273 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
274 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
277 # Prefix align with either -falign or -malign
278 cc-option-align = $(subst -functions=0,,\
279 $(call cc-option,-falign-functions=0,-malign-functions=0))
282 # Usage gcc-ver := $(call cc-version $(CC))
283 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
284 $(if $(1), $(1), $(CC)))
287 # Look for make include files relative to root of kernel src
288 MAKEFLAGS += --include-dir=$(srctree)
290 # We need some generic definitions
291 include $(srctree)/scripts/Kbuild.include
293 # For maximum performance (+ possibly random breakage, uncomment
298 # Make variables (CC, etc...)
300 AS = $(CROSS_COMPILE)as
301 LD = $(CROSS_COMPILE)ld
302 CC = $(CROSS_COMPILE)gcc
304 AR = $(CROSS_COMPILE)ar
305 NM = $(CROSS_COMPILE)nm
306 STRIP = $(CROSS_COMPILE)strip
307 OBJCOPY = $(CROSS_COMPILE)objcopy
308 OBJDUMP = $(CROSS_COMPILE)objdump
310 GENKSYMS = scripts/genksyms/genksyms
311 DEPMOD = /sbin/depmod
312 KALLSYMS = scripts/kallsyms
316 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
318 CFLAGS_MODULE = $(MODFLAGS)
319 AFLAGS_MODULE = $(MODFLAGS)
325 # Use LINUXINCLUDE when you must reference the include/ directory.
326 # Needed to be compatible with the O= option
327 LINUXINCLUDE := -Iinclude \
328 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
329 -include include/linux/autoconf.h
331 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
333 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
334 -fno-strict-aliasing -fno-common \
336 AFLAGS := -D__ASSEMBLY__
338 # Read KERNELRELEASE from .kernelrelease (if it exists)
339 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
341 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE \
342 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
343 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
344 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
346 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
347 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
348 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
350 # When compiling out-of-tree modules, put MODVERDIR in the module
351 # tree rather than in the kernel tree. The kernel tree might
353 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
355 # Files to ignore in find ... statements
357 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
358 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
360 # ===========================================================================
361 # Rules shared between *config targets and build targets
363 # Basic helpers built in scripts/
364 .PHONY: scripts_basic
366 $(Q)$(MAKE) $(build)=scripts/basic
368 # To avoid any implicit rule to kick in, define an empty command.
369 scripts/basic/%: scripts_basic ;
371 .PHONY: outputmakefile
372 # outputmakefile generate a Makefile to be placed in output directory, if
373 # using a seperate output directory. This allows convinient use
374 # of make in output directory
376 $(Q)if test ! $(srctree) -ef $(objtree); then \
377 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
378 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
379 > $(objtree)/Makefile; \
380 echo ' GEN $(objtree)/Makefile'; \
383 # To make sure we do not include .config for any of the *config targets
384 # catch them early, and hand them over to scripts/kconfig/Makefile
385 # It is allowed to specify more targets when calling make, including
386 # mixing *config targets and build targets.
387 # For example 'make oldconfig all'.
388 # Detect when mixed targets is specified, and make a second invocation
389 # of make so .config is not included in this case either (for *config).
391 no-dot-config-targets := clean mrproper distclean \
392 cscope TAGS tags help %docs check%
398 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
399 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
404 ifeq ($(KBUILD_EXTMOD),)
405 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
407 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
413 ifeq ($(mixed-targets),1)
414 # ===========================================================================
415 # We're called with mixed targets (*config and build targets).
416 # Handle them one by one.
419 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
422 ifeq ($(config-targets),1)
423 # ===========================================================================
424 # *config targets only - make sure prerequisites are updated, and descend
425 # in scripts/kconfig to make the *config target
427 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
428 # KBUILD_DEFCONFIG may point out an alternative default configuration
429 # used for 'make defconfig'
430 include $(srctree)/arch/$(ARCH)/Makefile
431 export KBUILD_DEFCONFIG
433 config %config: scripts_basic outputmakefile FORCE
434 $(Q)mkdir -p include/linux
435 $(Q)$(MAKE) $(build)=scripts/kconfig $@
438 # ===========================================================================
439 # Build targets only - this includes vmlinux, arch specific targets, clean
440 # targets and others. In general all targets except *config targets.
442 ifeq ($(KBUILD_EXTMOD),)
443 # Additional helpers built in scripts/
444 # Carefully list dependencies so we do not try to build scripts twice
447 scripts: scripts_basic include/config/MARKER
448 $(Q)$(MAKE) $(build)=$(@)
450 scripts_basic: include/linux/autoconf.h
452 # Objects we will link into vmlinux / subdirs we need to visit
454 drivers-y := drivers/ sound/
458 endif # KBUILD_EXTMOD
460 ifeq ($(dot-config),1)
461 # In this section, we need .config
463 # Read in dependencies to all Kconfig* files, make sure to run
464 # oldconfig if changes are detected.
469 # If .config needs to be updated, it will be done via the dependency
470 # that autoconf has on .config.
471 # To avoid any implicit rule to kick in, define an empty command
472 .config .kconfig.d: ;
474 # If .config is newer than include/linux/autoconf.h, someone tinkered
475 # with it and forgot to run make oldconfig.
476 # If kconfig.d is missing then we are probarly in a cleaned tree so
477 # we execute the config step to be sure to catch updated Kconfig files
478 include/linux/autoconf.h: .kconfig.d .config
479 $(Q)mkdir -p include/linux
480 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
482 # Dummy target needed, because used as prerequisite
483 include/linux/autoconf.h: ;
486 # The all: target is the default when no target is given on the
488 # This allow a user to issue only 'make' to build a kernel including modules
489 # Defaults vmlinux but it is usually overriden in the arch makefile
492 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
498 #Add align options if CONFIG_CC_* is not equal to 0
499 add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
500 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
501 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
502 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
503 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
505 ifdef CONFIG_FRAME_POINTER
506 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
508 CFLAGS += -fomit-frame-pointer
511 ifdef CONFIG_DEBUG_INFO
515 include $(srctree)/arch/$(ARCH)/Makefile
517 # arch Makefile may override CC so keep this after arch Makefile is included
518 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
519 CHECKFLAGS += $(NOSTDINC_FLAGS)
521 # warn about C99 declaration after statement
522 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
524 # disable pointer signedness warnings in gcc 4.0
525 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
527 # Default kernel image to build when no specific target is given.
528 # KBUILD_IMAGE may be overruled on the commandline or
529 # set in the environment
530 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
532 export KBUILD_IMAGE ?= vmlinux
535 # INSTALL_PATH specifies where to place the updated kernel and system map
536 # images. Default is /boot, but you can set it to other values
537 export INSTALL_PATH ?= /boot
540 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
541 # relocations required by build roots. This is not defined in the
542 # makefile but the arguement can be passed to make if needed.
545 MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
549 ifeq ($(KBUILD_EXTMOD),)
550 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
552 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
553 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
554 $(net-y) $(net-m) $(libs-y) $(libs-m)))
556 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
558 $(core-n) $(core-) $(drivers-n) $(drivers-) \
559 $(net-n) $(net-) $(libs-n) $(libs-))))
561 init-y := $(patsubst %/, %/built-in.o, $(init-y))
562 core-y := $(patsubst %/, %/built-in.o, $(core-y))
563 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
564 net-y := $(patsubst %/, %/built-in.o, $(net-y))
565 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
566 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
567 libs-y := $(libs-y1) $(libs-y2)
570 # ---------------------------------------------------------------------------
571 # vmlinux is build from the objects selected by $(vmlinux-init) and
572 # $(vmlinux-main). Most are built-in.o files from top-level directories
573 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
574 # Ordering when linking is important, and $(vmlinux-init) must be first.
579 # +-< $(vmlinux-init)
580 # | +--< init/version.o + more
582 # +--< $(vmlinux-main)
583 # | +--< driver/built-in.o mm/built-in.o + more
585 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
587 # vmlinux version (uname -v) cannot be updated during normal
588 # descending-into-subdirs phase since we do not yet know if we need to
590 # Therefore this step is delayed until just before final link of vmlinux -
591 # except in the kallsyms case where it is done just before adding the
592 # symbols to the kernel.
594 # System.map is generated to document addresses of all kernel symbols
596 vmlinux-init := $(head-y) $(init-y)
597 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
598 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
599 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
601 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
602 # May be overridden by arch/$(ARCH)/Makefile
603 quiet_cmd_vmlinux__ ?= LD $@
604 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
605 -T $(vmlinux-lds) $(vmlinux-init) \
606 --start-group $(vmlinux-main) --end-group \
607 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
609 # Generate new vmlinux version
610 quiet_cmd_vmlinux_version = GEN .version
611 cmd_vmlinux_version = set -e; \
612 if [ ! -r .version ]; then \
616 mv .version .old_version; \
617 expr 0$$(cat .old_version) + 1 >.version; \
619 $(MAKE) $(build)=init
621 # Generate System.map
622 quiet_cmd_sysmap = SYSMAP
623 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
626 # If CONFIG_KALLSYMS is set .version is already updated
627 # Generate System.map and verify that the content is consistent
628 # Use + in front of the vmlinux_version rule to silent warning with make -j2
629 # First command is ':' to allow us to use + in front of the rule
630 define rule_vmlinux__
632 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
634 $(call cmd,vmlinux__)
635 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
637 $(Q)$(if $($(quiet)cmd_sysmap), \
638 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
639 $(cmd_sysmap) $@ System.map; \
640 if [ $$? -ne 0 ]; then \
648 ifdef CONFIG_KALLSYMS
649 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
650 # It's a three stage process:
651 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
653 # Running kallsyms on that gives us .tmp_kallsyms1.o with
654 # the right size - vmlinux version (uname -v) is updated during this step
655 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
656 # but due to the added section, some addresses have shifted.
657 # From here, we generate a correct .tmp_kallsyms2.o
658 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
659 # o Verify that the System.map from vmlinux matches the map from
660 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
661 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
662 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
663 # temporary bypass to allow the kernel to be built while the
664 # maintainers work out what went wrong with kallsyms.
666 ifdef CONFIG_KALLSYMS_EXTRA_PASS
672 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
674 define verify_kallsyms
675 $(Q)$(if $($(quiet)cmd_sysmap), \
676 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
677 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
678 $(Q)cmp -s System.map .tmp_System.map || \
679 (echo Inconsistent kallsyms data; \
680 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
681 rm .tmp_kallsyms* ; /bin/false )
684 # Update vmlinux version before link
685 # Use + in front of this rule to silent warning about make -j1
686 # First command is ':' to allow us to use + in front of this rule
687 cmd_ksym_ld = $(cmd_vmlinux__)
690 +$(call cmd,vmlinux_version)
691 $(call cmd,vmlinux__)
692 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
695 # Generate .S file with all kernel symbols
696 quiet_cmd_kallsyms = KSYM $@
697 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
698 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
700 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
701 $(call if_changed_dep,as_o_S)
703 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
706 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
707 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
708 $(call if_changed_rule,ksym_ld)
710 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
711 $(call if_changed,vmlinux__)
713 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
714 $(call if_changed,vmlinux__)
716 # Needs to visit scripts/ before $(KALLSYMS) can be used.
717 $(KALLSYMS): scripts ;
719 # Generate some data for debugging strange kallsyms problems
720 debug_kallsyms: .tmp_map$(last_kallsyms)
722 .tmp_map%: .tmp_vmlinux% FORCE
723 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
729 endif # ifdef CONFIG_KALLSYMS
731 # vmlinux image - including updated kernel symbols
732 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
733 $(call if_changed_rule,vmlinux__)
734 $(Q)rm -f .old_version
736 # The actual objects are generated when descending,
737 # make sure no implicit rule kicks in
738 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
740 # Handle descending into subdirectories listed in $(vmlinux-dirs)
741 # Preset locale variables to speed up the build process. Limit locale
742 # tweaks to this spot to avoid wrong language settings when running
743 # make menuconfig etc.
744 # Error messages still appears in the original language
746 .PHONY: $(vmlinux-dirs)
747 $(vmlinux-dirs): prepare scripts
748 $(Q)$(MAKE) $(build)=$@
750 # Build the kernel release string
751 # The KERNELRELEASE is stored in a file named .kernelrelease
752 # to be used when executing for example make install or make modules_install
754 # Take the contents of any files called localversion* and the config
755 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
756 # LOCALVERSION from the command line override all of this
759 space := $(nullstring) # end of line
761 ___localver = $(objtree)/localversion* $(srctree)/localversion*
762 __localver = $(sort $(wildcard $(___localver)))
763 # skip backup files (containing '~')
764 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
766 localver = $(subst $(space),, \
767 $(shell cat /dev/null $(_localver)) \
768 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
770 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
771 # and if the SCM is know a tag from the SCM is appended.
772 # The appended tag is determinded by the SCM used.
774 # Currently, only git is supported.
775 # Other SCMs can edit scripts/setlocalversion and add the appropriate
777 ifdef CONFIG_LOCALVERSION_AUTO
778 _localver-auto = $(shell $(CONFIG_SHELL) \
779 $(srctree)/scripts/setlocalversion $(srctree))
780 localver-auto = $(LOCALVERSION)$(_localver-auto)
783 localver-full = $(localver)$(localver-auto)
785 # Store (new) KERNELRELASE string in .kernelrelease
787 $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(localver-full)
788 .kernelrelease: FORCE
789 $(Q)rm -f .kernelrelease
790 $(Q)echo $(kernelrelease) > .kernelrelease
791 $(Q)echo " Building kernel $(kernelrelease)"
794 # Things we need to do before we recursively start building the kernel
795 # or the modules are listed in "prepare".
796 # A multi level approach is used. prepareN is processed before prepareN-1.
797 # archprepare is used in arch Makefiles and when processed asm symlink,
798 # version.h and scripts_basic is processed / created.
800 # Listed in dependency order
801 .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
803 # prepare-all is deprecated, use prepare as valid replacement
806 # prepare3 is used to check if we are building in a separate output directory,
808 # 1) Check that make has not been executed in the kernel src $(srctree)
809 # 2) Create the include2 directory, used for the second asm symlink
810 prepare3: .kernelrelease
811 ifneq ($(KBUILD_SRC),)
812 @echo ' Using $(srctree) as source for kernel'
813 $(Q)if [ -f $(srctree)/.config ]; then \
814 echo " $(srctree) is not clean, please run 'make mrproper'";\
815 echo " in the '$(srctree)' directory.";\
818 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
819 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
822 # prepare2 creates a makefile if using a separate output directory
823 prepare2: prepare3 outputmakefile
825 prepare1: prepare2 include/linux/version.h include/asm \
826 include/config/MARKER
827 ifneq ($(KBUILD_MODULES),)
828 $(Q)rm -rf $(MODVERDIR)
829 $(Q)mkdir -p $(MODVERDIR)
832 archprepare: prepare1 scripts_basic
834 prepare0: archprepare FORCE
835 $(Q)$(MAKE) $(build)=.
837 # All the preparing..
838 prepare prepare-all: prepare0
840 # Leave this as default for preprocessing vmlinux.lds.S, which is now
841 # done in arch/$(ARCH)/kernel/Makefile
843 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
846 # ---------------------------------------------------------------------------
848 %.s: %.c scripts FORCE
849 $(Q)$(MAKE) $(build)=$(@D) $@
850 %.i: %.c scripts FORCE
851 $(Q)$(MAKE) $(build)=$(@D) $@
852 %.o: %.c scripts FORCE
853 $(Q)$(MAKE) $(build)=$(@D) $@
855 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
856 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
857 %/: scripts prepare FORCE
858 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
859 %.lst: %.c scripts FORCE
860 $(Q)$(MAKE) $(build)=$(@D) $@
861 %.s: %.S scripts FORCE
862 $(Q)$(MAKE) $(build)=$(@D) $@
863 %.o: %.S scripts FORCE
864 $(Q)$(MAKE) $(build)=$(@D) $@
866 # FIXME: The asm symlink changes when $(ARCH) changes. That's
867 # hard to detect, but I suppose "make mrproper" is a good idea
868 # before switching between archs anyway.
871 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
872 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
873 @ln -fsn asm-$(ARCH) $@
875 # Split autoconf.h into include/linux/config/*
877 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
878 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
879 @scripts/basic/split-include include/linux/autoconf.h include/config
882 # Generate some files
883 # ---------------------------------------------------------------------------
885 # KERNELRELEASE can change from a few different places, meaning version.h
886 # needs to be updated, so this check is forced on all builds
890 define filechk_version.h
891 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
892 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
895 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
896 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
897 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
901 include/linux/version.h: $(srctree)/Makefile FORCE
902 $(call filechk,version.h)
904 # ---------------------------------------------------------------------------
908 @echo '*** Warning: make $@ is unnecessary now.'
910 # ---------------------------------------------------------------------------
915 # By default, build modules as well
922 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
923 @echo ' Building modules, stage 2.';
924 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
927 # Target to prepare building external modules
928 .PHONY: modules_prepare
929 modules_prepare: prepare scripts
931 # Target to install modules
932 .PHONY: modules_install
933 modules_install: _modinst_ _modinst_post
937 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
938 echo "Warning: you may need to install module-init-tools"; \
939 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
942 @rm -rf $(MODLIB)/kernel
943 @rm -f $(MODLIB)/source
944 @mkdir -p $(MODLIB)/kernel
945 @ln -s $(srctree) $(MODLIB)/source
946 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
947 rm -f $(MODLIB)/build ; \
948 ln -s $(objtree) $(MODLIB)/build ; \
950 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
952 # If System.map exists, run depmod. This deliberately does not have a
953 # dependency on System.map since that would run the dependency tree on
954 # vmlinux. This depmod is only for convenience to give the initial
955 # boot a modules.dep even before / is mounted read-write. However the
956 # boot script depmod is the master version.
957 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
960 depmod_opts := -b $(INSTALL_MOD_PATH) -r
962 .PHONY: _modinst_post
963 _modinst_post: _modinst_
964 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
966 else # CONFIG_MODULES
968 # Modules not configured
969 # ---------------------------------------------------------------------------
971 modules modules_install: FORCE
973 @echo "The present kernel configuration has modules disabled."
974 @echo "Type 'make config' and enable loadable module support."
975 @echo "Then build a kernel with module support enabled."
979 endif # CONFIG_MODULES
982 # Cleaning is done on three levels.
983 # make clean Delete most generated files
984 # Leave enough to build external modules
985 # make mrproper Delete the current configuration, and all generated files
986 # make distclean Remove editor backup files, patch leftover files and the like
988 # Directories & files removed with 'make clean'
989 CLEAN_DIRS += $(MODVERDIR)
990 CLEAN_FILES += vmlinux System.map \
991 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
993 # Directories & files removed with 'make mrproper'
994 MRPROPER_DIRS += include/config include2
995 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
996 include/linux/autoconf.h include/linux/version.h \
997 .kernelrelease Module.symvers tags TAGS cscope*
999 # clean - Delete most, but leave enough to build external modules
1001 clean: rm-dirs := $(CLEAN_DIRS)
1002 clean: rm-files := $(CLEAN_FILES)
1003 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1005 .PHONY: $(clean-dirs) clean archclean
1007 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1009 clean: archclean $(clean-dirs)
1012 @find . $(RCS_FIND_IGNORE) \
1013 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1014 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1015 -type f -print | xargs rm -f
1017 # mrproper - Delete all generated files, including .config
1019 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1020 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1021 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1023 .PHONY: $(mrproper-dirs) mrproper archmrproper
1025 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1027 mrproper: clean archmrproper $(mrproper-dirs)
1036 @find $(srctree) $(RCS_FIND_IGNORE) \
1037 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1038 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1039 -o -name '.*.rej' -o -size 0 \
1040 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1041 -type f -print | xargs rm -f
1044 # Packaging of the kernel to various formats
1045 # ---------------------------------------------------------------------------
1046 # rpm target kept for backward compatibility
1047 package-dir := $(srctree)/scripts/package
1052 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1054 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1057 # Brief documentation of the typical targets used
1058 # ---------------------------------------------------------------------------
1060 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1061 boards := $(notdir $(boards))
1064 @echo 'Cleaning targets:'
1065 @echo ' clean - remove most generated files but keep the config'
1066 @echo ' mrproper - remove all generated files + config + various backup files'
1068 @echo 'Configuration targets:'
1069 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1071 @echo 'Other generic targets:'
1072 @echo ' all - Build all targets marked with [*]'
1073 @echo '* vmlinux - Build the bare kernel'
1074 @echo '* modules - Build all modules'
1075 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1076 @echo ' dir/ - Build all files in dir and below'
1077 @echo ' dir/file.[ois] - Build specified target only'
1078 @echo ' dir/file.ko - Build module including final link'
1079 @echo ' rpm - Build a kernel as an RPM package'
1080 @echo ' tags/TAGS - Generate tags file for editors'
1081 @echo ' cscope - Generate cscope index'
1082 @echo ' kernelrelease - Output the release version string'
1083 @echo ' kernelversion - Output the version stored in Makefile'
1085 @echo 'Static analysers'
1086 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1087 @echo ' and init sections from non-init sections'
1088 @echo ' checkstack - Generate a list of stack hogs'
1089 @echo ' namespacecheck - Name space analysis on compiled kernel'
1091 @echo 'Kernel packaging:'
1092 @$(MAKE) -f $(package-dir)/Makefile help
1094 @echo 'Documentation targets:'
1095 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1097 @echo 'Architecture specific targets ($(ARCH)):'
1098 @$(if $(archhelp),$(archhelp),\
1099 echo ' No architecture specific help defined for $(ARCH)')
1102 $(foreach b, $(boards), \
1103 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1106 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1107 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1108 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1109 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1111 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1112 @echo 'For further info see the ./README file'
1115 # Documentation targets
1116 # ---------------------------------------------------------------------------
1117 %docs: scripts_basic FORCE
1118 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1120 else # KBUILD_EXTMOD
1123 # External module support.
1124 # When building external modules the kernel used as basis is considered
1125 # read-only, and no consistency checks are made and the make
1126 # system is not used on the basis kernel. If updates are required
1127 # in the basis kernel ordinary make commands (without M=...) must
1130 # The following are the only valid targets when building external
1132 # make M=dir clean Delete all automatically generated files
1133 # make M=dir modules Make all modules in specified dir
1134 # make M=dir Same as 'make M=dir modules'
1135 # make M=dir modules_install
1136 # Install the modules build in the module directory
1137 # Assumes install directory is already created
1139 # We are always building modules
1143 $(Q)mkdir -p $(MODVERDIR)
1145 .PHONY: $(objtree)/Module.symvers
1146 $(objtree)/Module.symvers:
1147 @test -e $(objtree)/Module.symvers || ( \
1149 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1150 echo " is missing; modules will have no dependencies and modversions."; \
1153 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1154 .PHONY: $(module-dirs) modules
1155 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1156 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1158 modules: $(module-dirs)
1159 @echo ' Building modules, stage 2.';
1160 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1162 .PHONY: modules_install
1164 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1166 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1168 .PHONY: $(clean-dirs) clean
1170 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1172 clean: rm-dirs := $(MODVERDIR)
1173 clean: $(clean-dirs)
1175 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1176 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1177 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1178 -type f -print | xargs rm -f
1181 @echo ' Building external modules.'
1182 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1184 @echo ' modules - default target, build the module(s)'
1185 @echo ' modules_install - install the module'
1186 @echo ' clean - remove generated files in module directory only'
1188 endif # KBUILD_EXTMOD
1190 # Generate tags for editors
1191 # ---------------------------------------------------------------------------
1193 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1194 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1195 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1197 ifeq ($(src),$(obj))
1200 __srctree = $(srctree)/
1203 ifeq ($(ALLSOURCE_ARCHS),)
1205 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1207 ALLINCLUDE_ARCHS := $(ARCH)
1210 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1211 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1214 ALLSOURCE_ARCHS := $(ARCH)
1217 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1218 \( -name include -o -name arch \) -prune -o \
1219 -name '*.[chS]' -print; \
1220 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1221 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1222 -name '*.[chS]' -print; \
1224 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1225 -name '*.[chS]' -print; \
1226 find $(__srctree)include $(RCS_FIND_IGNORE) \
1227 \( -name config -o -name 'asm-*' \) -prune \
1228 -o -name '*.[chS]' -print; \
1229 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1230 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1231 -name '*.[chS]' -print; \
1233 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1234 -name '*.[chS]' -print )
1237 quiet_cmd_cscope-file = FILELST cscope.files
1238 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1240 quiet_cmd_cscope = MAKE cscope.out
1241 cmd_cscope = cscope -b
1244 $(call cmd,cscope-file)
1247 quiet_cmd_TAGS = MAKE $@
1250 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1251 echo "-I __initdata,__exitdata,__acquires,__releases \
1252 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1253 --extra=+f --c-kinds=+px"`; \
1254 $(all-sources) | xargs etags $$ETAGSF -a
1261 quiet_cmd_tags = MAKE $@
1264 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1265 echo "-I __initdata,__exitdata,__acquires,__releases \
1266 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1267 --extra=+f --c-kinds=+px"`; \
1268 $(all-sources) | xargs ctags $$CTAGSF -a
1275 # Scripts to check various things for consistency
1276 # ---------------------------------------------------------------------------
1279 find * $(RCS_FIND_IGNORE) \
1280 -name '*.[hcS]' -type f -print | sort \
1281 | xargs $(PERL) -w scripts/checkincludes.pl
1284 find * $(RCS_FIND_IGNORE) \
1285 -name '*.[hcS]' -type f -print | sort \
1286 | xargs $(PERL) -w scripts/checkversion.pl
1289 $(PERL) $(srctree)/scripts/reference_discarded.pl
1290 $(PERL) $(srctree)/scripts/reference_init.pl
1293 $(PERL) $(srctree)/scripts/namespace.pl
1295 endif #ifeq ($(config-targets),1)
1296 endif #ifeq ($(mixed-targets),1)
1300 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1301 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1304 @echo $(KERNELRELEASE)
1306 @echo $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
1308 # FIXME Should go into a make.lib or something
1309 # ===========================================================================
1311 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1312 cmd_rmdirs = rm -rf $(rm-dirs)
1314 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1315 cmd_rmfiles = rm -f $(rm-files)
1318 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1319 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1320 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1322 quiet_cmd_as_o_S = AS $@
1323 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1325 # read all saved command lines
1327 targets := $(wildcard $(sort $(targets)))
1328 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1330 ifneq ($(cmd_files),)
1331 $(cmd_files): ; # Do not try to update included dependency files
1332 include $(cmd_files)
1335 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1337 # $(Q)$(MAKE) $(clean)=dir
1338 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1340 endif # skip-makefile