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
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 generate a Makefile to be placed in output directory, if
348 # using a seperate output directory. This allows convinient use
349 # of make in output directory
351 $(Q)if test ! $(srctree) -ef $(objtree); then \
352 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
353 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
354 > $(objtree)/Makefile; \
355 echo ' GEN $(objtree)/Makefile'; \
358 # To make sure we do not include .config for any of the *config targets
359 # catch them early, and hand them over to scripts/kconfig/Makefile
360 # It is allowed to specify more targets when calling make, including
361 # mixing *config targets and build targets.
362 # For example 'make oldconfig all'.
363 # Detect when mixed targets is specified, and make a second invocation
364 # of make so .config is not included in this case either (for *config).
366 no-dot-config-targets := clean mrproper distclean \
367 cscope TAGS tags help %docs check%
373 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
374 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
379 ifeq ($(KBUILD_EXTMOD),)
380 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
382 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
388 ifeq ($(mixed-targets),1)
389 # ===========================================================================
390 # We're called with mixed targets (*config and build targets).
391 # Handle them one by one.
394 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
397 ifeq ($(config-targets),1)
398 # ===========================================================================
399 # *config targets only - make sure prerequisites are updated, and descend
400 # in scripts/kconfig to make the *config target
402 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
403 # KBUILD_DEFCONFIG may point out an alternative default configuration
404 # used for 'make defconfig'
405 include $(srctree)/arch/$(ARCH)/Makefile
406 export KBUILD_DEFCONFIG
408 config %config: scripts_basic outputmakefile FORCE
409 $(Q)mkdir -p include/linux
410 $(Q)$(MAKE) $(build)=scripts/kconfig $@
411 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
414 # ===========================================================================
415 # Build targets only - this includes vmlinux, arch specific targets, clean
416 # targets and others. In general all targets except *config targets.
418 ifeq ($(KBUILD_EXTMOD),)
419 # Additional helpers built in scripts/
420 # Carefully list dependencies so we do not try to build scripts twice
423 scripts: scripts_basic include/config/MARKER
424 $(Q)$(MAKE) $(build)=$(@)
426 scripts_basic: include/linux/autoconf.h
428 # Objects we will link into vmlinux / subdirs we need to visit
430 drivers-y := drivers/ sound/
434 endif # KBUILD_EXTMOD
436 ifeq ($(dot-config),1)
437 # In this section, we need .config
439 # Read in dependencies to all Kconfig* files, make sure to run
440 # oldconfig if changes are detected.
445 # If .config needs to be updated, it will be done via the dependency
446 # that autoconf has on .config.
447 # To avoid any implicit rule to kick in, define an empty command
448 .config .kconfig.d: ;
450 # If .config is newer than include/linux/autoconf.h, someone tinkered
451 # with it and forgot to run make oldconfig.
452 # If kconfig.d is missing then we are probarly in a cleaned tree so
453 # we execute the config step to be sure to catch updated Kconfig files
454 include/linux/autoconf.h: .kconfig.d .config
455 $(Q)mkdir -p include/linux
456 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
458 # Dummy target needed, because used as prerequisite
459 include/linux/autoconf.h: ;
462 # The all: target is the default when no target is given on the
464 # This allow a user to issue only 'make' to build a kernel including modules
465 # Defaults vmlinux but it is usually overriden in the arch makefile
468 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
474 ifdef CONFIG_FRAME_POINTER
475 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
477 CFLAGS += -fomit-frame-pointer
480 ifdef CONFIG_UNWIND_INFO
481 CFLAGS += -fasynchronous-unwind-tables
484 ifdef CONFIG_DEBUG_INFO
488 include $(srctree)/arch/$(ARCH)/Makefile
490 # arch Makefile may override CC so keep this after arch Makefile is included
491 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
492 CHECKFLAGS += $(NOSTDINC_FLAGS)
494 # warn about C99 declaration after statement
495 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
497 # disable pointer signedness warnings in gcc 4.0
498 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
500 # Default kernel image to build when no specific target is given.
501 # KBUILD_IMAGE may be overruled on the commandline or
502 # set in the environment
503 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
505 export KBUILD_IMAGE ?= vmlinux
508 # INSTALL_PATH specifies where to place the updated kernel and system map
509 # images. Default is /boot, but you can set it to other values
510 export INSTALL_PATH ?= /boot
513 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
514 # relocations required by build roots. This is not defined in the
515 # makefile but the arguement can be passed to make if needed.
518 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
522 ifeq ($(KBUILD_EXTMOD),)
523 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
525 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
526 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
527 $(net-y) $(net-m) $(libs-y) $(libs-m)))
529 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
531 $(core-n) $(core-) $(drivers-n) $(drivers-) \
532 $(net-n) $(net-) $(libs-n) $(libs-))))
534 init-y := $(patsubst %/, %/built-in.o, $(init-y))
535 core-y := $(patsubst %/, %/built-in.o, $(core-y))
536 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
537 net-y := $(patsubst %/, %/built-in.o, $(net-y))
538 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
539 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
540 libs-y := $(libs-y1) $(libs-y2)
543 # ---------------------------------------------------------------------------
544 # vmlinux is build from the objects selected by $(vmlinux-init) and
545 # $(vmlinux-main). Most are built-in.o files from top-level directories
546 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
547 # Ordering when linking is important, and $(vmlinux-init) must be first.
552 # +-< $(vmlinux-init)
553 # | +--< init/version.o + more
555 # +--< $(vmlinux-main)
556 # | +--< driver/built-in.o mm/built-in.o + more
558 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
560 # vmlinux version (uname -v) cannot be updated during normal
561 # descending-into-subdirs phase since we do not yet know if we need to
563 # Therefore this step is delayed until just before final link of vmlinux -
564 # except in the kallsyms case where it is done just before adding the
565 # symbols to the kernel.
567 # System.map is generated to document addresses of all kernel symbols
569 vmlinux-init := $(head-y) $(init-y)
570 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
571 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
572 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
574 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
575 # May be overridden by arch/$(ARCH)/Makefile
576 quiet_cmd_vmlinux__ ?= LD $@
577 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
578 -T $(vmlinux-lds) $(vmlinux-init) \
579 --start-group $(vmlinux-main) --end-group \
580 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
582 # Generate new vmlinux version
583 quiet_cmd_vmlinux_version = GEN .version
584 cmd_vmlinux_version = set -e; \
585 if [ ! -r .version ]; then \
589 mv .version .old_version; \
590 expr 0$$(cat .old_version) + 1 >.version; \
592 $(MAKE) $(build)=init
594 # Generate System.map
595 quiet_cmd_sysmap = SYSMAP
596 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
599 # If CONFIG_KALLSYMS is set .version is already updated
600 # Generate System.map and verify that the content is consistent
601 # Use + in front of the vmlinux_version rule to silent warning with make -j2
602 # First command is ':' to allow us to use + in front of the rule
603 define rule_vmlinux__
605 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
607 $(call cmd,vmlinux__)
608 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
610 $(Q)$(if $($(quiet)cmd_sysmap), \
611 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
612 $(cmd_sysmap) $@ System.map; \
613 if [ $$? -ne 0 ]; then \
621 ifdef CONFIG_KALLSYMS
622 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
623 # It's a three stage process:
624 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
626 # Running kallsyms on that gives us .tmp_kallsyms1.o with
627 # the right size - vmlinux version (uname -v) is updated during this step
628 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
629 # but due to the added section, some addresses have shifted.
630 # From here, we generate a correct .tmp_kallsyms2.o
631 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
632 # o Verify that the System.map from vmlinux matches the map from
633 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
634 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
635 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
636 # temporary bypass to allow the kernel to be built while the
637 # maintainers work out what went wrong with kallsyms.
639 ifdef CONFIG_KALLSYMS_EXTRA_PASS
645 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
647 define verify_kallsyms
648 $(Q)$(if $($(quiet)cmd_sysmap), \
649 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
650 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
651 $(Q)cmp -s System.map .tmp_System.map || \
652 (echo Inconsistent kallsyms data; \
653 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
654 rm .tmp_kallsyms* ; /bin/false )
657 # Update vmlinux version before link
658 # Use + in front of this rule to silent warning about make -j1
659 # First command is ':' to allow us to use + in front of this rule
660 cmd_ksym_ld = $(cmd_vmlinux__)
663 +$(call cmd,vmlinux_version)
664 $(call cmd,vmlinux__)
665 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
668 # Generate .S file with all kernel symbols
669 quiet_cmd_kallsyms = KSYM $@
670 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
671 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
673 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
674 $(call if_changed_dep,as_o_S)
676 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
679 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
680 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
681 $(call if_changed_rule,ksym_ld)
683 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
684 $(call if_changed,vmlinux__)
686 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
687 $(call if_changed,vmlinux__)
689 # Needs to visit scripts/ before $(KALLSYMS) can be used.
690 $(KALLSYMS): scripts ;
692 # Generate some data for debugging strange kallsyms problems
693 debug_kallsyms: .tmp_map$(last_kallsyms)
695 .tmp_map%: .tmp_vmlinux% FORCE
696 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
702 endif # ifdef CONFIG_KALLSYMS
704 # vmlinux image - including updated kernel symbols
705 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
706 $(call if_changed_rule,vmlinux__)
707 $(Q)rm -f .old_version
709 # The actual objects are generated when descending,
710 # make sure no implicit rule kicks in
711 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
713 # Handle descending into subdirectories listed in $(vmlinux-dirs)
714 # Preset locale variables to speed up the build process. Limit locale
715 # tweaks to this spot to avoid wrong language settings when running
716 # make menuconfig etc.
717 # Error messages still appears in the original language
719 PHONY += $(vmlinux-dirs)
720 $(vmlinux-dirs): prepare scripts
721 $(Q)$(MAKE) $(build)=$@
723 # Build the kernel release string
724 # The KERNELRELEASE is stored in a file named .kernelrelease
725 # to be used when executing for example make install or make modules_install
727 # Take the contents of any files called localversion* and the config
728 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
729 # LOCALVERSION from the command line override all of this
732 space := $(nullstring) # end of line
734 ___localver = $(objtree)/localversion* $(srctree)/localversion*
735 __localver = $(sort $(wildcard $(___localver)))
736 # skip backup files (containing '~')
737 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
739 localver = $(subst $(space),, \
740 $(shell cat /dev/null $(_localver)) \
741 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
743 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
744 # and if the SCM is know a tag from the SCM is appended.
745 # The appended tag is determinded by the SCM used.
747 # Currently, only git is supported.
748 # Other SCMs can edit scripts/setlocalversion and add the appropriate
750 ifdef CONFIG_LOCALVERSION_AUTO
751 _localver-auto = $(shell $(CONFIG_SHELL) \
752 $(srctree)/scripts/setlocalversion $(srctree))
753 localver-auto = $(LOCALVERSION)$(_localver-auto)
756 localver-full = $(localver)$(localver-auto)
758 # Store (new) KERNELRELASE string in .kernelrelease
759 kernelrelease = $(KERNELVERSION)$(localver-full)
760 .kernelrelease: FORCE
762 $(Q)echo $(kernelrelease) > $@
765 # Things we need to do before we recursively start building the kernel
766 # or the modules are listed in "prepare".
767 # A multi level approach is used. prepareN is processed before prepareN-1.
768 # archprepare is used in arch Makefiles and when processed asm symlink,
769 # version.h and scripts_basic is processed / created.
771 # Listed in dependency order
772 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
774 # prepare-all is deprecated, use prepare as valid replacement
777 # prepare3 is used to check if we are building in a separate output directory,
779 # 1) Check that make has not been executed in the kernel src $(srctree)
780 # 2) Create the include2 directory, used for the second asm symlink
781 prepare3: .kernelrelease
782 ifneq ($(KBUILD_SRC),)
783 @echo ' Using $(srctree) as source for kernel'
784 $(Q)if [ -f $(srctree)/.config ]; then \
785 echo " $(srctree) is not clean, please run 'make mrproper'";\
786 echo " in the '$(srctree)' directory.";\
789 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
790 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
793 # prepare2 creates a makefile if using a separate output directory
794 prepare2: prepare3 outputmakefile
796 prepare1: prepare2 include/linux/version.h include/asm \
797 include/config/MARKER
798 ifneq ($(KBUILD_MODULES),)
799 $(Q)mkdir -p $(MODVERDIR)
800 $(Q)rm -f $(MODVERDIR)/*
803 archprepare: prepare1 scripts_basic
805 prepare0: archprepare FORCE
806 $(Q)$(MAKE) $(build)=.
808 # All the preparing..
809 prepare prepare-all: prepare0
811 # Leave this as default for preprocessing vmlinux.lds.S, which is now
812 # done in arch/$(ARCH)/kernel/Makefile
814 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
816 # FIXME: The asm symlink changes when $(ARCH) changes. That's
817 # hard to detect, but I suppose "make mrproper" is a good idea
818 # before switching between archs anyway.
821 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
822 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
823 @ln -fsn asm-$(ARCH) $@
825 # Split autoconf.h into include/linux/config/*
827 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
828 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
829 @scripts/basic/split-include include/linux/autoconf.h include/config
832 # Generate some files
833 # ---------------------------------------------------------------------------
835 # KERNELRELEASE can change from a few different places, meaning version.h
836 # needs to be updated, so this check is forced on all builds
840 define filechk_version.h
841 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
842 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
845 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
846 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
847 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
851 include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
852 $(call filechk,version.h)
854 # ---------------------------------------------------------------------------
858 @echo '*** Warning: make $@ is unnecessary now.'
860 # ---------------------------------------------------------------------------
865 # By default, build modules as well
872 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
873 @echo ' Building modules, stage 2.';
874 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
877 # Target to prepare building external modules
878 PHONY += modules_prepare
879 modules_prepare: prepare scripts
881 # Target to install modules
882 PHONY += modules_install
883 modules_install: _modinst_ _modinst_post
887 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
888 echo "Warning: you may need to install module-init-tools"; \
889 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
892 @rm -rf $(MODLIB)/kernel
893 @rm -f $(MODLIB)/source
894 @mkdir -p $(MODLIB)/kernel
895 @ln -s $(srctree) $(MODLIB)/source
896 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
897 rm -f $(MODLIB)/build ; \
898 ln -s $(objtree) $(MODLIB)/build ; \
900 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
902 # If System.map exists, run depmod. This deliberately does not have a
903 # dependency on System.map since that would run the dependency tree on
904 # vmlinux. This depmod is only for convenience to give the initial
905 # boot a modules.dep even before / is mounted read-write. However the
906 # boot script depmod is the master version.
907 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
910 depmod_opts := -b $(INSTALL_MOD_PATH) -r
912 PHONY += _modinst_post
913 _modinst_post: _modinst_
914 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
916 else # CONFIG_MODULES
918 # Modules not configured
919 # ---------------------------------------------------------------------------
921 modules modules_install: FORCE
923 @echo "The present kernel configuration has modules disabled."
924 @echo "Type 'make config' and enable loadable module support."
925 @echo "Then build a kernel with module support enabled."
929 endif # CONFIG_MODULES
932 # Cleaning is done on three levels.
933 # make clean Delete most generated files
934 # Leave enough to build external modules
935 # make mrproper Delete the current configuration, and all generated files
936 # make distclean Remove editor backup files, patch leftover files and the like
938 # Directories & files removed with 'make clean'
939 CLEAN_DIRS += $(MODVERDIR)
940 CLEAN_FILES += vmlinux System.map \
941 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
943 # Directories & files removed with 'make mrproper'
944 MRPROPER_DIRS += include/config include2
945 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
946 include/linux/autoconf.h include/linux/version.h \
947 .kernelrelease Module.symvers tags TAGS cscope*
949 # clean - Delete most, but leave enough to build external modules
951 clean: rm-dirs := $(CLEAN_DIRS)
952 clean: rm-files := $(CLEAN_FILES)
953 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
955 PHONY += $(clean-dirs) clean archclean
957 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
959 clean: archclean $(clean-dirs)
962 @find . $(RCS_FIND_IGNORE) \
963 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
964 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
965 -type f -print | xargs rm -f
967 # mrproper - Delete all generated files, including .config
969 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
970 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
971 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
973 PHONY += $(mrproper-dirs) mrproper archmrproper
975 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
977 mrproper: clean archmrproper $(mrproper-dirs)
986 @find $(srctree) $(RCS_FIND_IGNORE) \
987 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
988 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
989 -o -name '.*.rej' -o -size 0 \
990 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
991 -type f -print | xargs rm -f
994 # Packaging of the kernel to various formats
995 # ---------------------------------------------------------------------------
996 # rpm target kept for backward compatibility
997 package-dir := $(srctree)/scripts/package
1000 $(Q)$(MAKE) $(build)=$(package-dir) $@
1002 $(Q)$(MAKE) $(build)=$(package-dir) $@
1005 # Brief documentation of the typical targets used
1006 # ---------------------------------------------------------------------------
1008 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1009 boards := $(notdir $(boards))
1012 @echo 'Cleaning targets:'
1013 @echo ' clean - remove most generated files but keep the config'
1014 @echo ' mrproper - remove all generated files + config + various backup files'
1016 @echo 'Configuration targets:'
1017 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1019 @echo 'Other generic targets:'
1020 @echo ' all - Build all targets marked with [*]'
1021 @echo '* vmlinux - Build the bare kernel'
1022 @echo '* modules - Build all modules'
1023 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1024 @echo ' dir/ - Build all files in dir and below'
1025 @echo ' dir/file.[ois] - Build specified target only'
1026 @echo ' dir/file.ko - Build module including final link'
1027 @echo ' rpm - Build a kernel as an RPM package'
1028 @echo ' tags/TAGS - Generate tags file for editors'
1029 @echo ' cscope - Generate cscope index'
1030 @echo ' kernelrelease - Output the release version string'
1031 @echo ' kernelversion - Output the version stored in Makefile'
1033 @echo 'Static analysers'
1034 @echo ' checkstack - Generate a list of stack hogs'
1035 @echo ' namespacecheck - Name space analysis on compiled kernel'
1037 @echo 'Kernel packaging:'
1038 @$(MAKE) $(build)=$(package-dir) help
1040 @echo 'Documentation targets:'
1041 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1043 @echo 'Architecture specific targets ($(ARCH)):'
1044 @$(if $(archhelp),$(archhelp),\
1045 echo ' No architecture specific help defined for $(ARCH)')
1048 $(foreach b, $(boards), \
1049 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1052 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1053 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1054 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1055 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1057 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1058 @echo 'For further info see the ./README file'
1061 # Documentation targets
1062 # ---------------------------------------------------------------------------
1063 %docs: scripts_basic FORCE
1064 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1066 else # KBUILD_EXTMOD
1069 # External module support.
1070 # When building external modules the kernel used as basis is considered
1071 # read-only, and no consistency checks are made and the make
1072 # system is not used on the basis kernel. If updates are required
1073 # in the basis kernel ordinary make commands (without M=...) must
1076 # The following are the only valid targets when building external
1078 # make M=dir clean Delete all automatically generated files
1079 # make M=dir modules Make all modules in specified dir
1080 # make M=dir Same as 'make M=dir modules'
1081 # make M=dir modules_install
1082 # Install the modules build in the module directory
1083 # Assumes install directory is already created
1085 # We are always building modules
1087 PHONY += crmodverdir
1089 $(Q)mkdir -p $(MODVERDIR)
1090 $(Q)rm -f $(MODVERDIR)/*
1092 PHONY += $(objtree)/Module.symvers
1093 $(objtree)/Module.symvers:
1094 @test -e $(objtree)/Module.symvers || ( \
1096 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1097 echo " is missing; modules will have no dependencies and modversions."; \
1100 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1101 PHONY += $(module-dirs) modules
1102 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1103 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1105 modules: $(module-dirs)
1106 @echo ' Building modules, stage 2.';
1107 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1109 PHONY += modules_install
1110 modules_install: _emodinst_ _emodinst_post
1112 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1115 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1116 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1118 # Run depmod only is we have System.map and depmod is executable
1119 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1120 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1121 $(DEPMOD) -ae -F System.map \
1122 $(if $(strip $(INSTALL_MOD_PATH)), \
1123 -b $(INSTALL_MOD_PATH) -r) \
1127 PHONY += _emodinst_post
1128 _emodinst_post: _emodinst_
1131 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1133 PHONY += $(clean-dirs) clean
1135 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1137 clean: rm-dirs := $(MODVERDIR)
1138 clean: $(clean-dirs)
1140 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1141 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1142 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1143 -type f -print | xargs rm -f
1146 @echo ' Building external modules.'
1147 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1149 @echo ' modules - default target, build the module(s)'
1150 @echo ' modules_install - install the module'
1151 @echo ' clean - remove generated files in module directory only'
1155 PHONY += prepare scripts
1158 endif # KBUILD_EXTMOD
1160 # Generate tags for editors
1161 # ---------------------------------------------------------------------------
1163 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1164 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1165 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1167 ifeq ($(src),$(obj))
1170 __srctree = $(srctree)/
1173 ifeq ($(ALLSOURCE_ARCHS),)
1175 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1177 ALLINCLUDE_ARCHS := $(ARCH)
1180 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1181 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1184 ALLSOURCE_ARCHS := $(ARCH)
1187 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1188 \( -name include -o -name arch \) -prune -o \
1189 -name '*.[chS]' -print; \
1190 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1191 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1192 -name '*.[chS]' -print; \
1194 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1195 -name '*.[chS]' -print; \
1196 find $(__srctree)include $(RCS_FIND_IGNORE) \
1197 \( -name config -o -name 'asm-*' \) -prune \
1198 -o -name '*.[chS]' -print; \
1199 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1200 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1201 -name '*.[chS]' -print; \
1203 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1204 -name '*.[chS]' -print )
1207 quiet_cmd_cscope-file = FILELST cscope.files
1208 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1210 quiet_cmd_cscope = MAKE cscope.out
1211 cmd_cscope = cscope -b
1214 $(call cmd,cscope-file)
1217 quiet_cmd_TAGS = MAKE $@
1220 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1221 echo "-I __initdata,__exitdata,__acquires,__releases \
1222 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1223 --extra=+f --c-kinds=+px"`; \
1224 $(all-sources) | xargs etags $$ETAGSF -a
1231 quiet_cmd_tags = MAKE $@
1234 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1235 echo "-I __initdata,__exitdata,__acquires,__releases \
1236 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1237 --extra=+f --c-kinds=+px"`; \
1238 $(all-sources) | xargs ctags $$CTAGSF -a
1245 # Scripts to check various things for consistency
1246 # ---------------------------------------------------------------------------
1249 find * $(RCS_FIND_IGNORE) \
1250 -name '*.[hcS]' -type f -print | sort \
1251 | xargs $(PERL) -w scripts/checkincludes.pl
1254 find * $(RCS_FIND_IGNORE) \
1255 -name '*.[hcS]' -type f -print | sort \
1256 | xargs $(PERL) -w scripts/checkversion.pl
1259 $(PERL) $(srctree)/scripts/namespace.pl
1261 endif #ifeq ($(config-targets),1)
1262 endif #ifeq ($(mixed-targets),1)
1266 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1267 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1270 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1271 $(error kernelrelease not valid - run 'make *config' to update it))
1273 @echo $(KERNELVERSION)
1276 # ---------------------------------------------------------------------------
1277 # Single targets are compatible with:
1278 # - build whith mixed source and output
1279 # - build with separate output dir 'make O=...'
1280 # - external modules
1282 # target-dir => where to store outputfile
1283 # build-dir => directory in kernel source tree to use
1285 ifeq ($(KBUILD_EXTMOD),)
1286 build-dir = $(patsubst %/,%,$(dir $@))
1287 target-dir = $(dir $@)
1289 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1290 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1291 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1294 %.s: %.c prepare scripts FORCE
1295 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1296 %.i: %.c prepare scripts FORCE
1297 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1298 %.o: %.c prepare scripts FORCE
1299 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1300 %.lst: %.c prepare scripts FORCE
1301 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1302 %.s: %.S prepare scripts FORCE
1303 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1304 %.o: %.S prepare scripts FORCE
1305 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1308 / %/: prepare scripts FORCE
1309 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1310 $(build)=$(build-dir)
1311 %.ko: prepare scripts FORCE
1312 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1313 $(build)=$(build-dir) $(@:.ko=.o)
1314 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1316 # FIXME Should go into a make.lib or something
1317 # ===========================================================================
1319 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1320 cmd_rmdirs = rm -rf $(rm-dirs)
1322 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1323 cmd_rmfiles = rm -f $(rm-files)
1326 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1327 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1328 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1330 quiet_cmd_as_o_S = AS $@
1331 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1333 # read all saved command lines
1335 targets := $(wildcard $(sort $(targets)))
1336 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1338 ifneq ($(cmd_files),)
1339 $(cmd_files): ; # Do not try to update included dependency files
1340 include $(cmd_files)
1343 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1345 # $(Q)$(MAKE) $(clean)=dir
1346 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1348 endif # skip-makefile
1354 # Declare the contents of the .PHONY variable as phony. We keep that
1355 # information in a variable se we can use it in if_changed and friends.