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_DEBUG_INFO
524 include $(srctree)/arch/$(ARCH)/Makefile
526 # arch Makefile may override CC so keep this after arch Makefile is included
527 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
528 CHECKFLAGS += $(NOSTDINC_FLAGS)
530 # warn about C99 declaration after statement
531 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
533 # disable pointer signedness warnings in gcc 4.0
534 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
536 # Default kernel image to build when no specific target is given.
537 # KBUILD_IMAGE may be overruled on the commandline or
538 # set in the environment
539 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
541 export KBUILD_IMAGE ?= vmlinux
544 # INSTALL_PATH specifies where to place the updated kernel and system map
545 # images. Default is /boot, but you can set it to other values
546 export INSTALL_PATH ?= /boot
549 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
550 # relocations required by build roots. This is not defined in the
551 # makefile but the arguement can be passed to make if needed.
554 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
558 ifeq ($(KBUILD_EXTMOD),)
559 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
561 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
562 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
563 $(net-y) $(net-m) $(libs-y) $(libs-m)))
565 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
567 $(core-n) $(core-) $(drivers-n) $(drivers-) \
568 $(net-n) $(net-) $(libs-n) $(libs-))))
570 init-y := $(patsubst %/, %/built-in.o, $(init-y))
571 core-y := $(patsubst %/, %/built-in.o, $(core-y))
572 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
573 net-y := $(patsubst %/, %/built-in.o, $(net-y))
574 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
575 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
576 libs-y := $(libs-y1) $(libs-y2)
579 # ---------------------------------------------------------------------------
580 # vmlinux is build from the objects selected by $(vmlinux-init) and
581 # $(vmlinux-main). Most are built-in.o files from top-level directories
582 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
583 # Ordering when linking is important, and $(vmlinux-init) must be first.
588 # +-< $(vmlinux-init)
589 # | +--< init/version.o + more
591 # +--< $(vmlinux-main)
592 # | +--< driver/built-in.o mm/built-in.o + more
594 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
596 # vmlinux version (uname -v) cannot be updated during normal
597 # descending-into-subdirs phase since we do not yet know if we need to
599 # Therefore this step is delayed until just before final link of vmlinux -
600 # except in the kallsyms case where it is done just before adding the
601 # symbols to the kernel.
603 # System.map is generated to document addresses of all kernel symbols
605 vmlinux-init := $(head-y) $(init-y)
606 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
607 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
608 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
610 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
611 # May be overridden by arch/$(ARCH)/Makefile
612 quiet_cmd_vmlinux__ ?= LD $@
613 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
614 -T $(vmlinux-lds) $(vmlinux-init) \
615 --start-group $(vmlinux-main) --end-group \
616 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
618 # Generate new vmlinux version
619 quiet_cmd_vmlinux_version = GEN .version
620 cmd_vmlinux_version = set -e; \
621 if [ ! -r .version ]; then \
625 mv .version .old_version; \
626 expr 0$$(cat .old_version) + 1 >.version; \
628 $(MAKE) $(build)=init
630 # Generate System.map
631 quiet_cmd_sysmap = SYSMAP
632 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
635 # If CONFIG_KALLSYMS is set .version is already updated
636 # Generate System.map and verify that the content is consistent
637 # Use + in front of the vmlinux_version rule to silent warning with make -j2
638 # First command is ':' to allow us to use + in front of the rule
639 define rule_vmlinux__
641 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
643 $(call cmd,vmlinux__)
644 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
646 $(Q)$(if $($(quiet)cmd_sysmap), \
647 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
648 $(cmd_sysmap) $@ System.map; \
649 if [ $$? -ne 0 ]; then \
657 ifdef CONFIG_KALLSYMS
658 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
659 # It's a three stage process:
660 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
662 # Running kallsyms on that gives us .tmp_kallsyms1.o with
663 # the right size - vmlinux version (uname -v) is updated during this step
664 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
665 # but due to the added section, some addresses have shifted.
666 # From here, we generate a correct .tmp_kallsyms2.o
667 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
668 # o Verify that the System.map from vmlinux matches the map from
669 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
670 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
671 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
672 # temporary bypass to allow the kernel to be built while the
673 # maintainers work out what went wrong with kallsyms.
675 ifdef CONFIG_KALLSYMS_EXTRA_PASS
681 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
683 define verify_kallsyms
684 $(Q)$(if $($(quiet)cmd_sysmap), \
685 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
686 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
687 $(Q)cmp -s System.map .tmp_System.map || \
688 (echo Inconsistent kallsyms data; \
689 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
690 rm .tmp_kallsyms* ; /bin/false )
693 # Update vmlinux version before link
694 # Use + in front of this rule to silent warning about make -j1
695 # First command is ':' to allow us to use + in front of this rule
696 cmd_ksym_ld = $(cmd_vmlinux__)
699 +$(call cmd,vmlinux_version)
700 $(call cmd,vmlinux__)
701 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
704 # Generate .S file with all kernel symbols
705 quiet_cmd_kallsyms = KSYM $@
706 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
707 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
709 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
710 $(call if_changed_dep,as_o_S)
712 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
715 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
716 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
717 $(call if_changed_rule,ksym_ld)
719 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
720 $(call if_changed,vmlinux__)
722 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
723 $(call if_changed,vmlinux__)
725 # Needs to visit scripts/ before $(KALLSYMS) can be used.
726 $(KALLSYMS): scripts ;
728 # Generate some data for debugging strange kallsyms problems
729 debug_kallsyms: .tmp_map$(last_kallsyms)
731 .tmp_map%: .tmp_vmlinux% FORCE
732 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
738 endif # ifdef CONFIG_KALLSYMS
740 # vmlinux image - including updated kernel symbols
741 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
742 $(call if_changed_rule,vmlinux__)
743 $(Q)rm -f .old_version
745 # The actual objects are generated when descending,
746 # make sure no implicit rule kicks in
747 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
749 # Handle descending into subdirectories listed in $(vmlinux-dirs)
750 # Preset locale variables to speed up the build process. Limit locale
751 # tweaks to this spot to avoid wrong language settings when running
752 # make menuconfig etc.
753 # Error messages still appears in the original language
755 .PHONY: $(vmlinux-dirs)
756 $(vmlinux-dirs): prepare scripts
757 $(Q)$(MAKE) $(build)=$@
759 # Build the kernel release string
760 # The KERNELRELEASE is stored in a file named .kernelrelease
761 # to be used when executing for example make install or make modules_install
763 # Take the contents of any files called localversion* and the config
764 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
765 # LOCALVERSION from the command line override all of this
768 space := $(nullstring) # end of line
770 ___localver = $(objtree)/localversion* $(srctree)/localversion*
771 __localver = $(sort $(wildcard $(___localver)))
772 # skip backup files (containing '~')
773 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
775 localver = $(subst $(space),, \
776 $(shell cat /dev/null $(_localver)) \
777 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
779 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
780 # and if the SCM is know a tag from the SCM is appended.
781 # The appended tag is determinded by the SCM used.
783 # Currently, only git is supported.
784 # Other SCMs can edit scripts/setlocalversion and add the appropriate
786 ifdef CONFIG_LOCALVERSION_AUTO
787 _localver-auto = $(shell $(CONFIG_SHELL) \
788 $(srctree)/scripts/setlocalversion $(srctree))
789 localver-auto = $(LOCALVERSION)$(_localver-auto)
792 localver-full = $(localver)$(localver-auto)
794 # Store (new) KERNELRELASE string in .kernelrelease
795 kernelrelease = $(KERNELVERSION)$(localver-full)
796 .kernelrelease: FORCE
798 $(Q)echo $(kernelrelease) > $@
801 # Things we need to do before we recursively start building the kernel
802 # or the modules are listed in "prepare".
803 # A multi level approach is used. prepareN is processed before prepareN-1.
804 # archprepare is used in arch Makefiles and when processed asm symlink,
805 # version.h and scripts_basic is processed / created.
807 # Listed in dependency order
808 .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
810 # prepare-all is deprecated, use prepare as valid replacement
813 # prepare3 is used to check if we are building in a separate output directory,
815 # 1) Check that make has not been executed in the kernel src $(srctree)
816 # 2) Create the include2 directory, used for the second asm symlink
817 prepare3: .kernelrelease
818 ifneq ($(KBUILD_SRC),)
819 @echo ' Using $(srctree) as source for kernel'
820 $(Q)if [ -f $(srctree)/.config ]; then \
821 echo " $(srctree) is not clean, please run 'make mrproper'";\
822 echo " in the '$(srctree)' directory.";\
825 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
826 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
829 # prepare2 creates a makefile if using a separate output directory
830 prepare2: prepare3 outputmakefile
832 prepare1: prepare2 include/linux/version.h include/asm \
833 include/config/MARKER
834 ifneq ($(KBUILD_MODULES),)
835 $(Q)rm -rf $(MODVERDIR)
836 $(Q)mkdir -p $(MODVERDIR)
839 archprepare: prepare1 scripts_basic
841 prepare0: archprepare FORCE
842 $(Q)$(MAKE) $(build)=.
844 # All the preparing..
845 prepare prepare-all: prepare0
847 # Leave this as default for preprocessing vmlinux.lds.S, which is now
848 # done in arch/$(ARCH)/kernel/Makefile
850 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
853 # ---------------------------------------------------------------------------
855 %.s: %.c scripts FORCE
856 $(Q)$(MAKE) $(build)=$(@D) $@
857 %.i: %.c scripts FORCE
858 $(Q)$(MAKE) $(build)=$(@D) $@
859 %.o: %.c scripts FORCE
860 $(Q)$(MAKE) $(build)=$(@D) $@
862 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
863 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
864 %/: scripts prepare FORCE
865 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
866 %.lst: %.c scripts FORCE
867 $(Q)$(MAKE) $(build)=$(@D) $@
868 %.s: %.S scripts FORCE
869 $(Q)$(MAKE) $(build)=$(@D) $@
870 %.o: %.S scripts FORCE
871 $(Q)$(MAKE) $(build)=$(@D) $@
873 # FIXME: The asm symlink changes when $(ARCH) changes. That's
874 # hard to detect, but I suppose "make mrproper" is a good idea
875 # before switching between archs anyway.
878 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
879 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
880 @ln -fsn asm-$(ARCH) $@
882 # Split autoconf.h into include/linux/config/*
884 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
885 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
886 @scripts/basic/split-include include/linux/autoconf.h include/config
889 # Generate some files
890 # ---------------------------------------------------------------------------
892 # KERNELRELEASE can change from a few different places, meaning version.h
893 # needs to be updated, so this check is forced on all builds
897 define filechk_version.h
898 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
899 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
902 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
903 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
904 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
908 include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
909 $(call filechk,version.h)
911 # ---------------------------------------------------------------------------
915 @echo '*** Warning: make $@ is unnecessary now.'
917 # ---------------------------------------------------------------------------
922 # By default, build modules as well
929 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
930 @echo ' Building modules, stage 2.';
931 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
934 # Target to prepare building external modules
935 .PHONY: modules_prepare
936 modules_prepare: prepare scripts
938 # Target to install modules
939 .PHONY: modules_install
940 modules_install: _modinst_ _modinst_post
944 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
945 echo "Warning: you may need to install module-init-tools"; \
946 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
949 @rm -rf $(MODLIB)/kernel
950 @rm -f $(MODLIB)/source
951 @mkdir -p $(MODLIB)/kernel
952 @ln -s $(srctree) $(MODLIB)/source
953 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
954 rm -f $(MODLIB)/build ; \
955 ln -s $(objtree) $(MODLIB)/build ; \
957 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
959 # If System.map exists, run depmod. This deliberately does not have a
960 # dependency on System.map since that would run the dependency tree on
961 # vmlinux. This depmod is only for convenience to give the initial
962 # boot a modules.dep even before / is mounted read-write. However the
963 # boot script depmod is the master version.
964 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
967 depmod_opts := -b $(INSTALL_MOD_PATH) -r
969 .PHONY: _modinst_post
970 _modinst_post: _modinst_
971 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
973 else # CONFIG_MODULES
975 # Modules not configured
976 # ---------------------------------------------------------------------------
978 modules modules_install: FORCE
980 @echo "The present kernel configuration has modules disabled."
981 @echo "Type 'make config' and enable loadable module support."
982 @echo "Then build a kernel with module support enabled."
986 endif # CONFIG_MODULES
989 # Cleaning is done on three levels.
990 # make clean Delete most generated files
991 # Leave enough to build external modules
992 # make mrproper Delete the current configuration, and all generated files
993 # make distclean Remove editor backup files, patch leftover files and the like
995 # Directories & files removed with 'make clean'
996 CLEAN_DIRS += $(MODVERDIR)
997 CLEAN_FILES += vmlinux System.map \
998 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1000 # Directories & files removed with 'make mrproper'
1001 MRPROPER_DIRS += include/config include2
1002 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1003 include/linux/autoconf.h include/linux/version.h \
1004 .kernelrelease Module.symvers tags TAGS cscope*
1006 # clean - Delete most, but leave enough to build external modules
1008 clean: rm-dirs := $(CLEAN_DIRS)
1009 clean: rm-files := $(CLEAN_FILES)
1010 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1012 .PHONY: $(clean-dirs) clean archclean
1014 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1016 clean: archclean $(clean-dirs)
1019 @find . $(RCS_FIND_IGNORE) \
1020 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1021 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1022 -type f -print | xargs rm -f
1024 # mrproper - Delete all generated files, including .config
1026 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1027 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1028 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1030 .PHONY: $(mrproper-dirs) mrproper archmrproper
1032 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1034 mrproper: clean archmrproper $(mrproper-dirs)
1043 @find $(srctree) $(RCS_FIND_IGNORE) \
1044 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1045 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1046 -o -name '.*.rej' -o -size 0 \
1047 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1048 -type f -print | xargs rm -f
1051 # Packaging of the kernel to various formats
1052 # ---------------------------------------------------------------------------
1053 # rpm target kept for backward compatibility
1054 package-dir := $(srctree)/scripts/package
1059 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1061 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1064 # Brief documentation of the typical targets used
1065 # ---------------------------------------------------------------------------
1067 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1068 boards := $(notdir $(boards))
1071 @echo 'Cleaning targets:'
1072 @echo ' clean - remove most generated files but keep the config'
1073 @echo ' mrproper - remove all generated files + config + various backup files'
1075 @echo 'Configuration targets:'
1076 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1078 @echo 'Other generic targets:'
1079 @echo ' all - Build all targets marked with [*]'
1080 @echo '* vmlinux - Build the bare kernel'
1081 @echo '* modules - Build all modules'
1082 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1083 @echo ' dir/ - Build all files in dir and below'
1084 @echo ' dir/file.[ois] - Build specified target only'
1085 @echo ' dir/file.ko - Build module including final link'
1086 @echo ' rpm - Build a kernel as an RPM package'
1087 @echo ' tags/TAGS - Generate tags file for editors'
1088 @echo ' cscope - Generate cscope index'
1089 @echo ' kernelrelease - Output the release version string'
1090 @echo ' kernelversion - Output the version stored in Makefile'
1092 @echo 'Static analysers'
1093 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1094 @echo ' and init sections from non-init sections'
1095 @echo ' checkstack - Generate a list of stack hogs'
1096 @echo ' namespacecheck - Name space analysis on compiled kernel'
1098 @echo 'Kernel packaging:'
1099 @$(MAKE) -f $(package-dir)/Makefile help
1101 @echo 'Documentation targets:'
1102 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1104 @echo 'Architecture specific targets ($(ARCH)):'
1105 @$(if $(archhelp),$(archhelp),\
1106 echo ' No architecture specific help defined for $(ARCH)')
1109 $(foreach b, $(boards), \
1110 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1113 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1114 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1115 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1116 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1118 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1119 @echo 'For further info see the ./README file'
1122 # Documentation targets
1123 # ---------------------------------------------------------------------------
1124 %docs: scripts_basic FORCE
1125 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1127 else # KBUILD_EXTMOD
1130 # External module support.
1131 # When building external modules the kernel used as basis is considered
1132 # read-only, and no consistency checks are made and the make
1133 # system is not used on the basis kernel. If updates are required
1134 # in the basis kernel ordinary make commands (without M=...) must
1137 # The following are the only valid targets when building external
1139 # make M=dir clean Delete all automatically generated files
1140 # make M=dir modules Make all modules in specified dir
1141 # make M=dir Same as 'make M=dir modules'
1142 # make M=dir modules_install
1143 # Install the modules build in the module directory
1144 # Assumes install directory is already created
1146 # We are always building modules
1150 $(Q)mkdir -p $(MODVERDIR)
1152 .PHONY: $(objtree)/Module.symvers
1153 $(objtree)/Module.symvers:
1154 @test -e $(objtree)/Module.symvers || ( \
1156 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1157 echo " is missing; modules will have no dependencies and modversions."; \
1160 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1161 .PHONY: $(module-dirs) modules
1162 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1163 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1165 modules: $(module-dirs)
1166 @echo ' Building modules, stage 2.';
1167 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1169 .PHONY: modules_install
1171 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1173 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1175 .PHONY: $(clean-dirs) clean
1177 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1179 clean: rm-dirs := $(MODVERDIR)
1180 clean: $(clean-dirs)
1182 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1183 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1184 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1185 -type f -print | xargs rm -f
1188 @echo ' Building external modules.'
1189 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1191 @echo ' modules - default target, build the module(s)'
1192 @echo ' modules_install - install the module'
1193 @echo ' clean - remove generated files in module directory only'
1195 endif # KBUILD_EXTMOD
1197 # Generate tags for editors
1198 # ---------------------------------------------------------------------------
1200 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1201 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1202 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1204 ifeq ($(src),$(obj))
1207 __srctree = $(srctree)/
1210 ifeq ($(ALLSOURCE_ARCHS),)
1212 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1214 ALLINCLUDE_ARCHS := $(ARCH)
1217 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1218 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1221 ALLSOURCE_ARCHS := $(ARCH)
1224 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1225 \( -name include -o -name arch \) -prune -o \
1226 -name '*.[chS]' -print; \
1227 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1228 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1229 -name '*.[chS]' -print; \
1231 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1232 -name '*.[chS]' -print; \
1233 find $(__srctree)include $(RCS_FIND_IGNORE) \
1234 \( -name config -o -name 'asm-*' \) -prune \
1235 -o -name '*.[chS]' -print; \
1236 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1237 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1238 -name '*.[chS]' -print; \
1240 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1241 -name '*.[chS]' -print )
1244 quiet_cmd_cscope-file = FILELST cscope.files
1245 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1247 quiet_cmd_cscope = MAKE cscope.out
1248 cmd_cscope = cscope -b
1251 $(call cmd,cscope-file)
1254 quiet_cmd_TAGS = MAKE $@
1257 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1258 echo "-I __initdata,__exitdata,__acquires,__releases \
1259 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1260 --extra=+f --c-kinds=+px"`; \
1261 $(all-sources) | xargs etags $$ETAGSF -a
1268 quiet_cmd_tags = MAKE $@
1271 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1272 echo "-I __initdata,__exitdata,__acquires,__releases \
1273 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1274 --extra=+f --c-kinds=+px"`; \
1275 $(all-sources) | xargs ctags $$CTAGSF -a
1282 # Scripts to check various things for consistency
1283 # ---------------------------------------------------------------------------
1286 find * $(RCS_FIND_IGNORE) \
1287 -name '*.[hcS]' -type f -print | sort \
1288 | xargs $(PERL) -w scripts/checkincludes.pl
1291 find * $(RCS_FIND_IGNORE) \
1292 -name '*.[hcS]' -type f -print | sort \
1293 | xargs $(PERL) -w scripts/checkversion.pl
1296 $(PERL) $(srctree)/scripts/reference_discarded.pl
1297 $(PERL) $(srctree)/scripts/reference_init.pl
1300 $(PERL) $(srctree)/scripts/namespace.pl
1302 endif #ifeq ($(config-targets),1)
1303 endif #ifeq ($(mixed-targets),1)
1307 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1308 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1311 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1312 $(error kernelrelease not valid - run 'make *config' to update it))
1314 @echo $(KERNELVERSION)
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