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/ppc.*/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 += $(call as-option, -Wa$(comma)-isa=foo,)
268 as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
269 -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
270 else echo "$(2)"; fi ;)
273 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
275 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
276 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
279 # Usage: flag := $(call cc-option-yn, -march=winchip-c6)
280 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
281 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
284 # Prefix align with either -falign or -malign
285 cc-option-align = $(subst -functions=0,,\
286 $(call cc-option,-falign-functions=0,-malign-functions=0))
289 # Usage gcc-ver := $(call cc-version $(CC))
290 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
291 $(if $(1), $(1), $(CC)))
294 # Look for make include files relative to root of kernel src
295 MAKEFLAGS += --include-dir=$(srctree)
297 # We need some generic definitions
298 include $(srctree)/scripts/Kbuild.include
300 # For maximum performance (+ possibly random breakage, uncomment
305 # Make variables (CC, etc...)
307 AS = $(CROSS_COMPILE)as
308 LD = $(CROSS_COMPILE)ld
309 CC = $(CROSS_COMPILE)gcc
311 AR = $(CROSS_COMPILE)ar
312 NM = $(CROSS_COMPILE)nm
313 STRIP = $(CROSS_COMPILE)strip
314 OBJCOPY = $(CROSS_COMPILE)objcopy
315 OBJDUMP = $(CROSS_COMPILE)objdump
317 GENKSYMS = scripts/genksyms/genksyms
318 DEPMOD = /sbin/depmod
319 KALLSYMS = scripts/kallsyms
323 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
325 CFLAGS_MODULE = $(MODFLAGS)
326 AFLAGS_MODULE = $(MODFLAGS)
332 # Use LINUXINCLUDE when you must reference the include/ directory.
333 # Needed to be compatible with the O= option
334 LINUXINCLUDE := -Iinclude \
335 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
336 -include include/linux/autoconf.h
338 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
340 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
341 -fno-strict-aliasing -fno-common \
343 AFLAGS := -D__ASSEMBLY__
345 # Read KERNELRELEASE from .kernelrelease (if it exists)
346 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
347 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
349 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
350 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
351 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
352 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
354 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
355 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
356 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
358 # When compiling out-of-tree modules, put MODVERDIR in the module
359 # tree rather than in the kernel tree. The kernel tree might
361 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
363 # Files to ignore in find ... statements
365 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
366 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
368 # ===========================================================================
369 # Rules shared between *config targets and build targets
371 # Basic helpers built in scripts/
372 .PHONY: scripts_basic
374 $(Q)$(MAKE) $(build)=scripts/basic
376 # To avoid any implicit rule to kick in, define an empty command.
377 scripts/basic/%: scripts_basic ;
379 .PHONY: outputmakefile
380 # outputmakefile generate a Makefile to be placed in output directory, if
381 # using a seperate output directory. This allows convinient use
382 # of make in output directory
384 $(Q)if test ! $(srctree) -ef $(objtree); then \
385 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
386 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
387 > $(objtree)/Makefile; \
388 echo ' GEN $(objtree)/Makefile'; \
391 # To make sure we do not include .config for any of the *config targets
392 # catch them early, and hand them over to scripts/kconfig/Makefile
393 # It is allowed to specify more targets when calling make, including
394 # mixing *config targets and build targets.
395 # For example 'make oldconfig all'.
396 # Detect when mixed targets is specified, and make a second invocation
397 # of make so .config is not included in this case either (for *config).
399 no-dot-config-targets := clean mrproper distclean \
400 cscope TAGS tags help %docs check%
406 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
407 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
412 ifeq ($(KBUILD_EXTMOD),)
413 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
415 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
421 ifeq ($(mixed-targets),1)
422 # ===========================================================================
423 # We're called with mixed targets (*config and build targets).
424 # Handle them one by one.
427 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
430 ifeq ($(config-targets),1)
431 # ===========================================================================
432 # *config targets only - make sure prerequisites are updated, and descend
433 # in scripts/kconfig to make the *config target
435 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
436 # KBUILD_DEFCONFIG may point out an alternative default configuration
437 # used for 'make defconfig'
438 include $(srctree)/arch/$(ARCH)/Makefile
439 export KBUILD_DEFCONFIG
441 config %config: scripts_basic outputmakefile FORCE
442 $(Q)mkdir -p include/linux
443 $(Q)$(MAKE) $(build)=scripts/kconfig $@
444 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
447 # ===========================================================================
448 # Build targets only - this includes vmlinux, arch specific targets, clean
449 # targets and others. In general all targets except *config targets.
451 ifeq ($(KBUILD_EXTMOD),)
452 # Additional helpers built in scripts/
453 # Carefully list dependencies so we do not try to build scripts twice
456 scripts: scripts_basic include/config/MARKER
457 $(Q)$(MAKE) $(build)=$(@)
459 scripts_basic: include/linux/autoconf.h
461 # Objects we will link into vmlinux / subdirs we need to visit
463 drivers-y := drivers/ sound/
467 endif # KBUILD_EXTMOD
469 ifeq ($(dot-config),1)
470 # In this section, we need .config
472 # Read in dependencies to all Kconfig* files, make sure to run
473 # oldconfig if changes are detected.
478 # If .config needs to be updated, it will be done via the dependency
479 # that autoconf has on .config.
480 # To avoid any implicit rule to kick in, define an empty command
481 .config .kconfig.d: ;
483 # If .config is newer than include/linux/autoconf.h, someone tinkered
484 # with it and forgot to run make oldconfig.
485 # If kconfig.d is missing then we are probarly in a cleaned tree so
486 # we execute the config step to be sure to catch updated Kconfig files
487 include/linux/autoconf.h: .kconfig.d .config
488 $(Q)mkdir -p include/linux
489 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
491 # Dummy target needed, because used as prerequisite
492 include/linux/autoconf.h: ;
495 # The all: target is the default when no target is given on the
497 # This allow a user to issue only 'make' to build a kernel including modules
498 # Defaults vmlinux but it is usually overriden in the arch makefile
501 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
507 #Add align options if CONFIG_CC_* is not equal to 0
508 add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
509 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
510 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
511 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
512 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
514 ifdef CONFIG_FRAME_POINTER
515 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
517 CFLAGS += -fomit-frame-pointer
520 ifdef CONFIG_UNWIND_INFO
521 CFLAGS += -fasynchronous-unwind-tables
524 ifdef CONFIG_DEBUG_INFO
528 include $(srctree)/arch/$(ARCH)/Makefile
530 # arch Makefile may override CC so keep this after arch Makefile is included
531 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
532 CHECKFLAGS += $(NOSTDINC_FLAGS)
534 # warn about C99 declaration after statement
535 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
537 # disable pointer signedness warnings in gcc 4.0
538 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
540 # Default kernel image to build when no specific target is given.
541 # KBUILD_IMAGE may be overruled on the commandline or
542 # set in the environment
543 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
545 export KBUILD_IMAGE ?= vmlinux
548 # INSTALL_PATH specifies where to place the updated kernel and system map
549 # images. Default is /boot, but you can set it to other values
550 export INSTALL_PATH ?= /boot
553 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
554 # relocations required by build roots. This is not defined in the
555 # makefile but the arguement can be passed to make if needed.
558 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
562 ifeq ($(KBUILD_EXTMOD),)
563 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
565 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
566 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
567 $(net-y) $(net-m) $(libs-y) $(libs-m)))
569 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
571 $(core-n) $(core-) $(drivers-n) $(drivers-) \
572 $(net-n) $(net-) $(libs-n) $(libs-))))
574 init-y := $(patsubst %/, %/built-in.o, $(init-y))
575 core-y := $(patsubst %/, %/built-in.o, $(core-y))
576 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
577 net-y := $(patsubst %/, %/built-in.o, $(net-y))
578 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
579 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
580 libs-y := $(libs-y1) $(libs-y2)
583 # ---------------------------------------------------------------------------
584 # vmlinux is build from the objects selected by $(vmlinux-init) and
585 # $(vmlinux-main). Most are built-in.o files from top-level directories
586 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
587 # Ordering when linking is important, and $(vmlinux-init) must be first.
592 # +-< $(vmlinux-init)
593 # | +--< init/version.o + more
595 # +--< $(vmlinux-main)
596 # | +--< driver/built-in.o mm/built-in.o + more
598 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
600 # vmlinux version (uname -v) cannot be updated during normal
601 # descending-into-subdirs phase since we do not yet know if we need to
603 # Therefore this step is delayed until just before final link of vmlinux -
604 # except in the kallsyms case where it is done just before adding the
605 # symbols to the kernel.
607 # System.map is generated to document addresses of all kernel symbols
609 vmlinux-init := $(head-y) $(init-y)
610 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
611 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
612 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
614 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
615 # May be overridden by arch/$(ARCH)/Makefile
616 quiet_cmd_vmlinux__ ?= LD $@
617 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
618 -T $(vmlinux-lds) $(vmlinux-init) \
619 --start-group $(vmlinux-main) --end-group \
620 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
622 # Generate new vmlinux version
623 quiet_cmd_vmlinux_version = GEN .version
624 cmd_vmlinux_version = set -e; \
625 if [ ! -r .version ]; then \
629 mv .version .old_version; \
630 expr 0$$(cat .old_version) + 1 >.version; \
632 $(MAKE) $(build)=init
634 # Generate System.map
635 quiet_cmd_sysmap = SYSMAP
636 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
639 # If CONFIG_KALLSYMS is set .version is already updated
640 # Generate System.map and verify that the content is consistent
641 # Use + in front of the vmlinux_version rule to silent warning with make -j2
642 # First command is ':' to allow us to use + in front of the rule
643 define rule_vmlinux__
645 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
647 $(call cmd,vmlinux__)
648 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
650 $(Q)$(if $($(quiet)cmd_sysmap), \
651 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
652 $(cmd_sysmap) $@ System.map; \
653 if [ $$? -ne 0 ]; then \
661 ifdef CONFIG_KALLSYMS
662 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
663 # It's a three stage process:
664 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
666 # Running kallsyms on that gives us .tmp_kallsyms1.o with
667 # the right size - vmlinux version (uname -v) is updated during this step
668 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
669 # but due to the added section, some addresses have shifted.
670 # From here, we generate a correct .tmp_kallsyms2.o
671 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
672 # o Verify that the System.map from vmlinux matches the map from
673 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
674 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
675 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
676 # temporary bypass to allow the kernel to be built while the
677 # maintainers work out what went wrong with kallsyms.
679 ifdef CONFIG_KALLSYMS_EXTRA_PASS
685 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
687 define verify_kallsyms
688 $(Q)$(if $($(quiet)cmd_sysmap), \
689 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
690 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
691 $(Q)cmp -s System.map .tmp_System.map || \
692 (echo Inconsistent kallsyms data; \
693 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
694 rm .tmp_kallsyms* ; /bin/false )
697 # Update vmlinux version before link
698 # Use + in front of this rule to silent warning about make -j1
699 # First command is ':' to allow us to use + in front of this rule
700 cmd_ksym_ld = $(cmd_vmlinux__)
703 +$(call cmd,vmlinux_version)
704 $(call cmd,vmlinux__)
705 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
708 # Generate .S file with all kernel symbols
709 quiet_cmd_kallsyms = KSYM $@
710 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
711 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
713 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
714 $(call if_changed_dep,as_o_S)
716 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
719 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
720 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
721 $(call if_changed_rule,ksym_ld)
723 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
724 $(call if_changed,vmlinux__)
726 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
727 $(call if_changed,vmlinux__)
729 # Needs to visit scripts/ before $(KALLSYMS) can be used.
730 $(KALLSYMS): scripts ;
732 # Generate some data for debugging strange kallsyms problems
733 debug_kallsyms: .tmp_map$(last_kallsyms)
735 .tmp_map%: .tmp_vmlinux% FORCE
736 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
742 endif # ifdef CONFIG_KALLSYMS
744 # vmlinux image - including updated kernel symbols
745 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
746 $(call if_changed_rule,vmlinux__)
747 $(Q)rm -f .old_version
749 # The actual objects are generated when descending,
750 # make sure no implicit rule kicks in
751 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
753 # Handle descending into subdirectories listed in $(vmlinux-dirs)
754 # Preset locale variables to speed up the build process. Limit locale
755 # tweaks to this spot to avoid wrong language settings when running
756 # make menuconfig etc.
757 # Error messages still appears in the original language
759 .PHONY: $(vmlinux-dirs)
760 $(vmlinux-dirs): prepare scripts
761 $(Q)$(MAKE) $(build)=$@
763 # Build the kernel release string
764 # The KERNELRELEASE is stored in a file named .kernelrelease
765 # to be used when executing for example make install or make modules_install
767 # Take the contents of any files called localversion* and the config
768 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
769 # LOCALVERSION from the command line override all of this
772 space := $(nullstring) # end of line
774 ___localver = $(objtree)/localversion* $(srctree)/localversion*
775 __localver = $(sort $(wildcard $(___localver)))
776 # skip backup files (containing '~')
777 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
779 localver = $(subst $(space),, \
780 $(shell cat /dev/null $(_localver)) \
781 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
783 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
784 # and if the SCM is know a tag from the SCM is appended.
785 # The appended tag is determinded by the SCM used.
787 # Currently, only git is supported.
788 # Other SCMs can edit scripts/setlocalversion and add the appropriate
790 ifdef CONFIG_LOCALVERSION_AUTO
791 _localver-auto = $(shell $(CONFIG_SHELL) \
792 $(srctree)/scripts/setlocalversion $(srctree))
793 localver-auto = $(LOCALVERSION)$(_localver-auto)
796 localver-full = $(localver)$(localver-auto)
798 # Store (new) KERNELRELASE string in .kernelrelease
799 kernelrelease = $(KERNELVERSION)$(localver-full)
800 .kernelrelease: FORCE
802 $(Q)echo $(kernelrelease) > $@
805 # Things we need to do before we recursively start building the kernel
806 # or the modules are listed in "prepare".
807 # A multi level approach is used. prepareN is processed before prepareN-1.
808 # archprepare is used in arch Makefiles and when processed asm symlink,
809 # version.h and scripts_basic is processed / created.
811 # Listed in dependency order
812 .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
814 # prepare-all is deprecated, use prepare as valid replacement
817 # prepare3 is used to check if we are building in a separate output directory,
819 # 1) Check that make has not been executed in the kernel src $(srctree)
820 # 2) Create the include2 directory, used for the second asm symlink
821 prepare3: .kernelrelease
822 ifneq ($(KBUILD_SRC),)
823 @echo ' Using $(srctree) as source for kernel'
824 $(Q)if [ -f $(srctree)/.config ]; then \
825 echo " $(srctree) is not clean, please run 'make mrproper'";\
826 echo " in the '$(srctree)' directory.";\
829 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
830 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
833 # prepare2 creates a makefile if using a separate output directory
834 prepare2: prepare3 outputmakefile
836 prepare1: prepare2 include/linux/version.h include/asm \
837 include/config/MARKER
838 ifneq ($(KBUILD_MODULES),)
839 $(Q)rm -rf $(MODVERDIR)
840 $(Q)mkdir -p $(MODVERDIR)
843 archprepare: prepare1 scripts_basic
845 prepare0: archprepare FORCE
846 $(Q)$(MAKE) $(build)=.
848 # All the preparing..
849 prepare prepare-all: prepare0
851 # Leave this as default for preprocessing vmlinux.lds.S, which is now
852 # done in arch/$(ARCH)/kernel/Makefile
854 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
857 # ---------------------------------------------------------------------------
859 %.s: %.c scripts FORCE
860 $(Q)$(MAKE) $(build)=$(@D) $@
861 %.i: %.c scripts FORCE
862 $(Q)$(MAKE) $(build)=$(@D) $@
863 %.o: %.c scripts FORCE
864 $(Q)$(MAKE) $(build)=$(@D) $@
866 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
867 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
868 %/: scripts prepare FORCE
869 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
870 %.lst: %.c scripts FORCE
871 $(Q)$(MAKE) $(build)=$(@D) $@
872 %.s: %.S scripts FORCE
873 $(Q)$(MAKE) $(build)=$(@D) $@
874 %.o: %.S scripts FORCE
875 $(Q)$(MAKE) $(build)=$(@D) $@
877 # FIXME: The asm symlink changes when $(ARCH) changes. That's
878 # hard to detect, but I suppose "make mrproper" is a good idea
879 # before switching between archs anyway.
882 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
883 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
884 @ln -fsn asm-$(ARCH) $@
886 # Split autoconf.h into include/linux/config/*
888 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
889 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
890 @scripts/basic/split-include include/linux/autoconf.h include/config
893 # Generate some files
894 # ---------------------------------------------------------------------------
896 # KERNELRELEASE can change from a few different places, meaning version.h
897 # needs to be updated, so this check is forced on all builds
901 define filechk_version.h
902 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
903 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
906 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
907 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
908 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
912 include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
913 $(call filechk,version.h)
915 # ---------------------------------------------------------------------------
919 @echo '*** Warning: make $@ is unnecessary now.'
921 # ---------------------------------------------------------------------------
926 # By default, build modules as well
933 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
934 @echo ' Building modules, stage 2.';
935 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
938 # Target to prepare building external modules
939 .PHONY: modules_prepare
940 modules_prepare: prepare scripts
942 # Target to install modules
943 .PHONY: modules_install
944 modules_install: _modinst_ _modinst_post
948 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
949 echo "Warning: you may need to install module-init-tools"; \
950 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
953 @rm -rf $(MODLIB)/kernel
954 @rm -f $(MODLIB)/source
955 @mkdir -p $(MODLIB)/kernel
956 @ln -s $(srctree) $(MODLIB)/source
957 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
958 rm -f $(MODLIB)/build ; \
959 ln -s $(objtree) $(MODLIB)/build ; \
961 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
963 # If System.map exists, run depmod. This deliberately does not have a
964 # dependency on System.map since that would run the dependency tree on
965 # vmlinux. This depmod is only for convenience to give the initial
966 # boot a modules.dep even before / is mounted read-write. However the
967 # boot script depmod is the master version.
968 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
971 depmod_opts := -b $(INSTALL_MOD_PATH) -r
973 .PHONY: _modinst_post
974 _modinst_post: _modinst_
975 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
977 else # CONFIG_MODULES
979 # Modules not configured
980 # ---------------------------------------------------------------------------
982 modules modules_install: FORCE
984 @echo "The present kernel configuration has modules disabled."
985 @echo "Type 'make config' and enable loadable module support."
986 @echo "Then build a kernel with module support enabled."
990 endif # CONFIG_MODULES
993 # Cleaning is done on three levels.
994 # make clean Delete most generated files
995 # Leave enough to build external modules
996 # make mrproper Delete the current configuration, and all generated files
997 # make distclean Remove editor backup files, patch leftover files and the like
999 # Directories & files removed with 'make clean'
1000 CLEAN_DIRS += $(MODVERDIR)
1001 CLEAN_FILES += vmlinux System.map \
1002 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1004 # Directories & files removed with 'make mrproper'
1005 MRPROPER_DIRS += include/config include2
1006 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1007 include/linux/autoconf.h include/linux/version.h \
1008 .kernelrelease Module.symvers tags TAGS cscope*
1010 # clean - Delete most, but leave enough to build external modules
1012 clean: rm-dirs := $(CLEAN_DIRS)
1013 clean: rm-files := $(CLEAN_FILES)
1014 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1016 .PHONY: $(clean-dirs) clean archclean
1018 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1020 clean: archclean $(clean-dirs)
1023 @find . $(RCS_FIND_IGNORE) \
1024 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1025 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1026 -type f -print | xargs rm -f
1028 # mrproper - Delete all generated files, including .config
1030 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1031 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1032 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1034 .PHONY: $(mrproper-dirs) mrproper archmrproper
1036 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1038 mrproper: clean archmrproper $(mrproper-dirs)
1047 @find $(srctree) $(RCS_FIND_IGNORE) \
1048 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1049 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1050 -o -name '.*.rej' -o -size 0 \
1051 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1052 -type f -print | xargs rm -f
1055 # Packaging of the kernel to various formats
1056 # ---------------------------------------------------------------------------
1057 # rpm target kept for backward compatibility
1058 package-dir := $(srctree)/scripts/package
1063 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1065 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1068 # Brief documentation of the typical targets used
1069 # ---------------------------------------------------------------------------
1071 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1072 boards := $(notdir $(boards))
1075 @echo 'Cleaning targets:'
1076 @echo ' clean - remove most generated files but keep the config'
1077 @echo ' mrproper - remove all generated files + config + various backup files'
1079 @echo 'Configuration targets:'
1080 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1082 @echo 'Other generic targets:'
1083 @echo ' all - Build all targets marked with [*]'
1084 @echo '* vmlinux - Build the bare kernel'
1085 @echo '* modules - Build all modules'
1086 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1087 @echo ' dir/ - Build all files in dir and below'
1088 @echo ' dir/file.[ois] - Build specified target only'
1089 @echo ' dir/file.ko - Build module including final link'
1090 @echo ' rpm - Build a kernel as an RPM package'
1091 @echo ' tags/TAGS - Generate tags file for editors'
1092 @echo ' cscope - Generate cscope index'
1093 @echo ' kernelrelease - Output the release version string'
1094 @echo ' kernelversion - Output the version stored in Makefile'
1096 @echo 'Static analysers'
1097 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1098 @echo ' and init sections from non-init sections'
1099 @echo ' checkstack - Generate a list of stack hogs'
1100 @echo ' namespacecheck - Name space analysis on compiled kernel'
1102 @echo 'Kernel packaging:'
1103 @$(MAKE) -f $(package-dir)/Makefile help
1105 @echo 'Documentation targets:'
1106 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1108 @echo 'Architecture specific targets ($(ARCH)):'
1109 @$(if $(archhelp),$(archhelp),\
1110 echo ' No architecture specific help defined for $(ARCH)')
1113 $(foreach b, $(boards), \
1114 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1117 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1118 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1119 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1120 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1122 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1123 @echo 'For further info see the ./README file'
1126 # Documentation targets
1127 # ---------------------------------------------------------------------------
1128 %docs: scripts_basic FORCE
1129 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1131 else # KBUILD_EXTMOD
1134 # External module support.
1135 # When building external modules the kernel used as basis is considered
1136 # read-only, and no consistency checks are made and the make
1137 # system is not used on the basis kernel. If updates are required
1138 # in the basis kernel ordinary make commands (without M=...) must
1141 # The following are the only valid targets when building external
1143 # make M=dir clean Delete all automatically generated files
1144 # make M=dir modules Make all modules in specified dir
1145 # make M=dir Same as 'make M=dir modules'
1146 # make M=dir modules_install
1147 # Install the modules build in the module directory
1148 # Assumes install directory is already created
1150 # We are always building modules
1154 $(Q)mkdir -p $(MODVERDIR)
1156 .PHONY: $(objtree)/Module.symvers
1157 $(objtree)/Module.symvers:
1158 @test -e $(objtree)/Module.symvers || ( \
1160 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1161 echo " is missing; modules will have no dependencies and modversions."; \
1164 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1165 .PHONY: $(module-dirs) modules
1166 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1167 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1169 modules: $(module-dirs)
1170 @echo ' Building modules, stage 2.';
1171 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1173 .PHONY: modules_install
1175 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1177 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1179 .PHONY: $(clean-dirs) clean
1181 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1183 clean: rm-dirs := $(MODVERDIR)
1184 clean: $(clean-dirs)
1186 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1187 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1188 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1189 -type f -print | xargs rm -f
1192 @echo ' Building external modules.'
1193 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1195 @echo ' modules - default target, build the module(s)'
1196 @echo ' modules_install - install the module'
1197 @echo ' clean - remove generated files in module directory only'
1199 endif # KBUILD_EXTMOD
1201 # Generate tags for editors
1202 # ---------------------------------------------------------------------------
1204 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1205 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1206 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1208 ifeq ($(src),$(obj))
1211 __srctree = $(srctree)/
1214 ifeq ($(ALLSOURCE_ARCHS),)
1216 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1218 ALLINCLUDE_ARCHS := $(ARCH)
1221 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1222 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1225 ALLSOURCE_ARCHS := $(ARCH)
1228 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1229 \( -name include -o -name arch \) -prune -o \
1230 -name '*.[chS]' -print; \
1231 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1232 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1233 -name '*.[chS]' -print; \
1235 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1236 -name '*.[chS]' -print; \
1237 find $(__srctree)include $(RCS_FIND_IGNORE) \
1238 \( -name config -o -name 'asm-*' \) -prune \
1239 -o -name '*.[chS]' -print; \
1240 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1241 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1242 -name '*.[chS]' -print; \
1244 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1245 -name '*.[chS]' -print )
1248 quiet_cmd_cscope-file = FILELST cscope.files
1249 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1251 quiet_cmd_cscope = MAKE cscope.out
1252 cmd_cscope = cscope -b
1255 $(call cmd,cscope-file)
1258 quiet_cmd_TAGS = MAKE $@
1261 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1262 echo "-I __initdata,__exitdata,__acquires,__releases \
1263 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1264 --extra=+f --c-kinds=+px"`; \
1265 $(all-sources) | xargs etags $$ETAGSF -a
1272 quiet_cmd_tags = MAKE $@
1275 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1276 echo "-I __initdata,__exitdata,__acquires,__releases \
1277 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1278 --extra=+f --c-kinds=+px"`; \
1279 $(all-sources) | xargs ctags $$CTAGSF -a
1286 # Scripts to check various things for consistency
1287 # ---------------------------------------------------------------------------
1290 find * $(RCS_FIND_IGNORE) \
1291 -name '*.[hcS]' -type f -print | sort \
1292 | xargs $(PERL) -w scripts/checkincludes.pl
1295 find * $(RCS_FIND_IGNORE) \
1296 -name '*.[hcS]' -type f -print | sort \
1297 | xargs $(PERL) -w scripts/checkversion.pl
1300 $(PERL) $(srctree)/scripts/reference_discarded.pl
1301 $(PERL) $(srctree)/scripts/reference_init.pl
1304 $(PERL) $(srctree)/scripts/namespace.pl
1306 endif #ifeq ($(config-targets),1)
1307 endif #ifeq ($(mixed-targets),1)
1311 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1312 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1315 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1316 $(error kernelrelease not valid - run 'make *config' to update it))
1318 @echo $(KERNELVERSION)
1320 # FIXME Should go into a make.lib or something
1321 # ===========================================================================
1323 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1324 cmd_rmdirs = rm -rf $(rm-dirs)
1326 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1327 cmd_rmfiles = rm -f $(rm-files)
1330 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1331 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1332 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1334 quiet_cmd_as_o_S = AS $@
1335 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1337 # read all saved command lines
1339 targets := $(wildcard $(sort $(targets)))
1340 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1342 ifneq ($(cmd_files),)
1343 $(cmd_files): ; # Do not try to update included dependency files
1344 include $(cmd_files)
1347 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1349 # $(Q)$(MAKE) $(clean)=dir
1350 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1352 endif # skip-makefile