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 # Add custom flags here to avoid conflict with updates
14 EXTRAVERSION := $(EXTRAVERSION)-omap1
16 # Do not print "Entering directory ..."
17 MAKEFLAGS += --no-print-directory
19 # We are using a recursive build, so we need to do a little thinking
20 # to get the ordering right.
22 # Most importantly: sub-Makefiles should only ever modify files in
23 # their own directory. If in some directory we have a dependency on
24 # a file in another dir (which doesn't happen often, but it's often
25 # unavoidable when linking the built-in.o targets which finally
26 # turn into vmlinux), we will call a sub make in that other dir, and
27 # after that we are sure that everything which is in that other dir
30 # The only cases where we need to modify files which have global
31 # effects are thus separated out and done before the recursive
32 # descending is started. They are now explicitly listed as the
35 # To put more focus on warnings, be less verbose as default
36 # Use 'make V=1' to see the full commands
39 ifeq ("$(origin V)", "command line")
47 # Call sparse as part of compilation of C files
48 # Use 'make C=1' to enable sparse checking
51 ifeq ("$(origin C)", "command line")
52 KBUILD_CHECKSRC = $(C)
55 ifndef KBUILD_CHECKSRC
59 # Use make M=dir to specify directory of external module to build
60 # Old syntax make ... SUBDIRS=$PWD is still supported
61 # Setting the environment variable KBUILD_EXTMOD take precedence
63 KBUILD_EXTMOD ?= $(SUBDIRS)
66 ifeq ("$(origin M)", "command line")
72 # kbuild supports saving output files in a separate directory.
73 # To locate output files in a separate directory two syntaxes are supported.
74 # In both cases the working directory must be the root of the kernel src.
76 # Use "make O=dir/to/store/output/files/"
78 # 2) Set KBUILD_OUTPUT
79 # Set the environment variable KBUILD_OUTPUT to point to the directory
80 # where the output files shall be placed.
81 # export KBUILD_OUTPUT=dir/to/store/output/files/
84 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
88 # KBUILD_SRC is set on invocation of make in OBJ directory
89 # KBUILD_SRC is not intended to be used by the regular user (for now)
92 # OK, Make called in directory where kernel src resides
93 # Do we want to locate output files in a separate directory?
95 ifeq ("$(origin O)", "command line")
100 # That's our default target when none is given on the command line
104 ifneq ($(KBUILD_OUTPUT),)
105 # Invoke a second make in the output directory, passing relevant variables
106 # check that the output directory actually exists
107 saved-output := $(KBUILD_OUTPUT)
108 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
109 $(if $(KBUILD_OUTPUT),, \
110 $(error output directory "$(saved-output)" does not exist))
112 .PHONY: $(MAKECMDGOALS) cdbuilddir
113 $(MAKECMDGOALS) _all: cdbuilddir
116 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
117 KBUILD_SRC=$(CURDIR) \
118 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $(MAKECMDGOALS)
120 # Leave processing to above invocation of make
122 endif # ifneq ($(KBUILD_OUTPUT),)
123 endif # ifeq ($(KBUILD_SRC),)
125 # We process the rest of the Makefile if this is the final invocation of make
126 ifeq ($(skip-makefile),)
128 # If building an external module we do not care about the all: rule
129 # but instead _all depend on modules
131 ifeq ($(KBUILD_EXTMOD),)
137 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
139 # FIXME - TOPDIR is obsolete, use srctree/objtree
146 export srctree objtree VPATH TOPDIR
149 # SUBARCH tells the usermode build what the underlying arch is. That is set
150 # first, and if a usermode build is happening, the "ARCH=um" on the command
151 # line overrides the setting of ARCH below. If a native build is happening,
152 # then ARCH is assigned, getting whatever value it gets normally, and
153 # SUBARCH is subsequently ignored.
155 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
156 -e s/arm.*/arm/ -e s/sa110/arm/ \
157 -e s/s390x/s390/ -e s/parisc64/parisc/ \
158 -e s/ppc.*/powerpc/ )
161 # Cross compiling and selecting different set of gcc/bin-utils
162 # ---------------------------------------------------------------------------
164 # When performing cross compilation for other architectures ARCH shall be set
165 # to the target architecture. (See arch/* for the possibilities).
166 # ARCH can be set during invocation of make:
168 # Another way is to have ARCH set in the environment.
169 # The default ARCH is the host where make is executed.
171 # CROSS_COMPILE specify the prefix used for all executables used
172 # during compilation. Only gcc and related bin-utils executables
173 # are prefixed with $(CROSS_COMPILE).
174 # CROSS_COMPILE can be set on the command line
175 # make CROSS_COMPILE=ia64-linux-
176 # Alternatively CROSS_COMPILE can be set in the environment.
177 # Default value for CROSS_COMPILE is not to prefix executables
178 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
181 CROSS_COMPILE ?= arm-linux-
183 # Architecture as present in compile.h
184 UTS_MACHINE := $(ARCH)
186 # SHELL used by kbuild
187 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
188 else if [ -x /bin/bash ]; then echo /bin/bash; \
189 else echo sh; fi ; fi)
193 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
196 # Decide whether to build built-in, modular, or both.
197 # Normally, just do built-in.
202 # If we have only "make modules", don't compile built-in objects.
203 # When we're building modules with modversions, we need to consider
204 # the built-in objects during the descend as well, in order to
205 # make sure the checksums are uptodate before we record them.
207 ifeq ($(MAKECMDGOALS),modules)
208 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
211 # If we have "make <whatever> modules", compile modules
212 # in addition to whatever we do anyway.
213 # Just "make" or "make all" shall build modules as well
215 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
219 ifeq ($(MAKECMDGOALS),)
223 export KBUILD_MODULES KBUILD_BUILTIN
224 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
227 # ---------------------------------------------------------------------------
229 # Normally, we echo the whole command before executing it. By making
230 # that echo $($(quiet)$(cmd)), we now have the possibility to set
231 # $(quiet) to choose other forms of output instead, e.g.
233 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
234 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
236 # If $(quiet) is empty, the whole command will be printed.
237 # If it is set to "quiet_", only the short version will be printed.
238 # If it is set to "silent_", nothing wil be printed at all, since
239 # the variable $(silent_cmd_cc_o_c) doesn't exist.
241 # A simple variant is to prefix commands with $(Q) - that's useful
242 # for commands that shall be hidden in non-verbose mode.
246 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
247 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
249 ifeq ($(KBUILD_VERBOSE),1)
257 # If the user is running make -s (silent mode), suppress echoing of
260 ifneq ($(findstring s,$(MAKEFLAGS)),)
264 export quiet Q KBUILD_VERBOSE
267 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
268 # See documentation in Documentation/kbuild/makefiles.txt
271 # Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
273 as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
274 -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
275 else echo "$(2)"; fi ;)
278 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
280 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
281 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
284 # Usage: flag := $(call cc-option-yn, -march=winchip-c6)
285 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
286 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
289 # Prefix align with either -falign or -malign
290 cc-option-align = $(subst -functions=0,,\
291 $(call cc-option,-falign-functions=0,-malign-functions=0))
294 # Usage gcc-ver := $(call cc-version $(CC))
295 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
296 $(if $(1), $(1), $(CC)))
299 # Look for make include files relative to root of kernel src
300 MAKEFLAGS += --include-dir=$(srctree)
302 # We need some generic definitions
303 include $(srctree)/scripts/Kbuild.include
305 # For maximum performance (+ possibly random breakage, uncomment
310 # Make variables (CC, etc...)
312 AS = $(CROSS_COMPILE)as
313 LD = $(CROSS_COMPILE)ld
314 CC = $(CROSS_COMPILE)gcc
316 AR = $(CROSS_COMPILE)ar
317 NM = $(CROSS_COMPILE)nm
318 STRIP = $(CROSS_COMPILE)strip
319 OBJCOPY = $(CROSS_COMPILE)objcopy
320 OBJDUMP = $(CROSS_COMPILE)objdump
322 GENKSYMS = scripts/genksyms/genksyms
323 DEPMOD = /sbin/depmod
324 KALLSYMS = scripts/kallsyms
328 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
330 CFLAGS_MODULE = $(MODFLAGS)
331 AFLAGS_MODULE = $(MODFLAGS)
337 # Use LINUXINCLUDE when you must reference the include/ directory.
338 # Needed to be compatible with the O= option
339 LINUXINCLUDE := -Iinclude \
340 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
341 -include include/linux/autoconf.h
343 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
345 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
346 -fno-strict-aliasing -fno-common \
348 AFLAGS := -D__ASSEMBLY__
350 # Read KERNELRELEASE from .kernelrelease (if it exists)
351 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
352 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
354 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
355 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
356 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
357 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
359 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
360 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
361 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
363 # When compiling out-of-tree modules, put MODVERDIR in the module
364 # tree rather than in the kernel tree. The kernel tree might
366 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
368 # Files to ignore in find ... statements
370 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
371 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
373 # ===========================================================================
374 # Rules shared between *config targets and build targets
376 # Basic helpers built in scripts/
377 .PHONY: scripts_basic
379 $(Q)$(MAKE) $(build)=scripts/basic
381 # To avoid any implicit rule to kick in, define an empty command.
382 scripts/basic/%: scripts_basic ;
384 .PHONY: outputmakefile
385 # outputmakefile generate a Makefile to be placed in output directory, if
386 # using a seperate output directory. This allows convinient use
387 # of make in output directory
389 $(Q)if test ! $(srctree) -ef $(objtree); then \
390 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
391 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
392 > $(objtree)/Makefile; \
393 echo ' GEN $(objtree)/Makefile'; \
396 # To make sure we do not include .config for any of the *config targets
397 # catch them early, and hand them over to scripts/kconfig/Makefile
398 # It is allowed to specify more targets when calling make, including
399 # mixing *config targets and build targets.
400 # For example 'make oldconfig all'.
401 # Detect when mixed targets is specified, and make a second invocation
402 # of make so .config is not included in this case either (for *config).
404 no-dot-config-targets := clean mrproper distclean \
405 cscope TAGS tags help %docs check%
411 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
412 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
417 ifeq ($(KBUILD_EXTMOD),)
418 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
420 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
426 ifeq ($(mixed-targets),1)
427 # ===========================================================================
428 # We're called with mixed targets (*config and build targets).
429 # Handle them one by one.
432 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
435 ifeq ($(config-targets),1)
436 # ===========================================================================
437 # *config targets only - make sure prerequisites are updated, and descend
438 # in scripts/kconfig to make the *config target
440 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
441 # KBUILD_DEFCONFIG may point out an alternative default configuration
442 # used for 'make defconfig'
443 include $(srctree)/arch/$(ARCH)/Makefile
444 export KBUILD_DEFCONFIG
446 config %config: scripts_basic outputmakefile FORCE
447 $(Q)mkdir -p include/linux
448 $(Q)$(MAKE) $(build)=scripts/kconfig $@
449 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
452 # ===========================================================================
453 # Build targets only - this includes vmlinux, arch specific targets, clean
454 # targets and others. In general all targets except *config targets.
456 ifeq ($(KBUILD_EXTMOD),)
457 # Additional helpers built in scripts/
458 # Carefully list dependencies so we do not try to build scripts twice
461 scripts: scripts_basic include/config/MARKER
462 $(Q)$(MAKE) $(build)=$(@)
464 scripts_basic: include/linux/autoconf.h
466 # Objects we will link into vmlinux / subdirs we need to visit
468 drivers-y := drivers/ sound/
472 endif # KBUILD_EXTMOD
474 ifeq ($(dot-config),1)
475 # In this section, we need .config
477 # Read in dependencies to all Kconfig* files, make sure to run
478 # oldconfig if changes are detected.
483 # If .config needs to be updated, it will be done via the dependency
484 # that autoconf has on .config.
485 # To avoid any implicit rule to kick in, define an empty command
486 .config .kconfig.d: ;
488 # If .config is newer than include/linux/autoconf.h, someone tinkered
489 # with it and forgot to run make oldconfig.
490 # If kconfig.d is missing then we are probarly in a cleaned tree so
491 # we execute the config step to be sure to catch updated Kconfig files
492 include/linux/autoconf.h: .kconfig.d .config
493 $(Q)mkdir -p include/linux
494 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
496 # Dummy target needed, because used as prerequisite
497 include/linux/autoconf.h: ;
500 # The all: target is the default when no target is given on the
502 # This allow a user to issue only 'make' to build a kernel including modules
503 # Defaults vmlinux but it is usually overriden in the arch makefile
506 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
512 #Add align options if CONFIG_CC_* is not equal to 0
513 add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
514 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
515 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
516 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
517 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
519 ifdef CONFIG_FRAME_POINTER
520 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
522 CFLAGS += -fomit-frame-pointer
525 ifdef CONFIG_DEBUG_INFO
529 include $(srctree)/arch/$(ARCH)/Makefile
531 # arch Makefile may override CC so keep this after arch Makefile is included
532 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
533 CHECKFLAGS += $(NOSTDINC_FLAGS)
535 # warn about C99 declaration after statement
536 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
538 # disable pointer signedness warnings in gcc 4.0
539 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
541 # Default kernel image to build when no specific target is given.
542 # KBUILD_IMAGE may be overruled on the commandline or
543 # set in the environment
544 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
546 export KBUILD_IMAGE ?= vmlinux
549 # INSTALL_PATH specifies where to place the updated kernel and system map
550 # images. Default is /boot, but you can set it to other values
551 export INSTALL_PATH ?= /boot
554 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
555 # relocations required by build roots. This is not defined in the
556 # makefile but the arguement can be passed to make if needed.
559 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
563 ifeq ($(KBUILD_EXTMOD),)
564 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
566 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
567 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
568 $(net-y) $(net-m) $(libs-y) $(libs-m)))
570 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
572 $(core-n) $(core-) $(drivers-n) $(drivers-) \
573 $(net-n) $(net-) $(libs-n) $(libs-))))
575 init-y := $(patsubst %/, %/built-in.o, $(init-y))
576 core-y := $(patsubst %/, %/built-in.o, $(core-y))
577 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
578 net-y := $(patsubst %/, %/built-in.o, $(net-y))
579 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
580 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
581 libs-y := $(libs-y1) $(libs-y2)
584 # ---------------------------------------------------------------------------
585 # vmlinux is build from the objects selected by $(vmlinux-init) and
586 # $(vmlinux-main). Most are built-in.o files from top-level directories
587 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
588 # Ordering when linking is important, and $(vmlinux-init) must be first.
593 # +-< $(vmlinux-init)
594 # | +--< init/version.o + more
596 # +--< $(vmlinux-main)
597 # | +--< driver/built-in.o mm/built-in.o + more
599 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
601 # vmlinux version (uname -v) cannot be updated during normal
602 # descending-into-subdirs phase since we do not yet know if we need to
604 # Therefore this step is delayed until just before final link of vmlinux -
605 # except in the kallsyms case where it is done just before adding the
606 # symbols to the kernel.
608 # System.map is generated to document addresses of all kernel symbols
610 vmlinux-init := $(head-y) $(init-y)
611 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
612 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
613 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
615 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
616 # May be overridden by arch/$(ARCH)/Makefile
617 quiet_cmd_vmlinux__ ?= LD $@
618 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
619 -T $(vmlinux-lds) $(vmlinux-init) \
620 --start-group $(vmlinux-main) --end-group \
621 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
623 # Generate new vmlinux version
624 quiet_cmd_vmlinux_version = GEN .version
625 cmd_vmlinux_version = set -e; \
626 if [ ! -r .version ]; then \
630 mv .version .old_version; \
631 expr 0$$(cat .old_version) + 1 >.version; \
633 $(MAKE) $(build)=init
635 # Generate System.map
636 quiet_cmd_sysmap = SYSMAP
637 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
640 # If CONFIG_KALLSYMS is set .version is already updated
641 # Generate System.map and verify that the content is consistent
642 # Use + in front of the vmlinux_version rule to silent warning with make -j2
643 # First command is ':' to allow us to use + in front of the rule
644 define rule_vmlinux__
646 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
648 $(call cmd,vmlinux__)
649 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
651 $(Q)$(if $($(quiet)cmd_sysmap), \
652 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
653 $(cmd_sysmap) $@ System.map; \
654 if [ $$? -ne 0 ]; then \
662 ifdef CONFIG_KALLSYMS
663 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
664 # It's a three stage process:
665 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
667 # Running kallsyms on that gives us .tmp_kallsyms1.o with
668 # the right size - vmlinux version (uname -v) is updated during this step
669 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
670 # but due to the added section, some addresses have shifted.
671 # From here, we generate a correct .tmp_kallsyms2.o
672 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
673 # o Verify that the System.map from vmlinux matches the map from
674 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
675 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
676 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
677 # temporary bypass to allow the kernel to be built while the
678 # maintainers work out what went wrong with kallsyms.
680 ifdef CONFIG_KALLSYMS_EXTRA_PASS
686 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
688 define verify_kallsyms
689 $(Q)$(if $($(quiet)cmd_sysmap), \
690 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
691 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
692 $(Q)cmp -s System.map .tmp_System.map || \
693 (echo Inconsistent kallsyms data; \
694 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
695 rm .tmp_kallsyms* ; /bin/false )
698 # Update vmlinux version before link
699 # Use + in front of this rule to silent warning about make -j1
700 # First command is ':' to allow us to use + in front of this rule
701 cmd_ksym_ld = $(cmd_vmlinux__)
704 +$(call cmd,vmlinux_version)
705 $(call cmd,vmlinux__)
706 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
709 # Generate .S file with all kernel symbols
710 quiet_cmd_kallsyms = KSYM $@
711 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
712 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
714 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
715 $(call if_changed_dep,as_o_S)
717 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
720 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
721 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
722 $(call if_changed_rule,ksym_ld)
724 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
725 $(call if_changed,vmlinux__)
727 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
728 $(call if_changed,vmlinux__)
730 # Needs to visit scripts/ before $(KALLSYMS) can be used.
731 $(KALLSYMS): scripts ;
733 # Generate some data for debugging strange kallsyms problems
734 debug_kallsyms: .tmp_map$(last_kallsyms)
736 .tmp_map%: .tmp_vmlinux% FORCE
737 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
743 endif # ifdef CONFIG_KALLSYMS
745 # vmlinux image - including updated kernel symbols
746 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
747 $(call if_changed_rule,vmlinux__)
748 $(Q)rm -f .old_version
750 # The actual objects are generated when descending,
751 # make sure no implicit rule kicks in
752 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
754 # Handle descending into subdirectories listed in $(vmlinux-dirs)
755 # Preset locale variables to speed up the build process. Limit locale
756 # tweaks to this spot to avoid wrong language settings when running
757 # make menuconfig etc.
758 # Error messages still appears in the original language
760 .PHONY: $(vmlinux-dirs)
761 $(vmlinux-dirs): prepare scripts
762 $(Q)$(MAKE) $(build)=$@
764 # Build the kernel release string
765 # The KERNELRELEASE is stored in a file named .kernelrelease
766 # to be used when executing for example make install or make modules_install
768 # Take the contents of any files called localversion* and the config
769 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
770 # LOCALVERSION from the command line override all of this
773 space := $(nullstring) # end of line
775 ___localver = $(objtree)/localversion* $(srctree)/localversion*
776 __localver = $(sort $(wildcard $(___localver)))
777 # skip backup files (containing '~')
778 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
780 localver = $(subst $(space),, \
781 $(shell cat /dev/null $(_localver)) \
782 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
784 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
785 # and if the SCM is know a tag from the SCM is appended.
786 # The appended tag is determinded by the SCM used.
788 # Currently, only git is supported.
789 # Other SCMs can edit scripts/setlocalversion and add the appropriate
791 ifdef CONFIG_LOCALVERSION_AUTO
792 _localver-auto = $(shell $(CONFIG_SHELL) \
793 $(srctree)/scripts/setlocalversion $(srctree))
794 localver-auto = $(LOCALVERSION)$(_localver-auto)
797 localver-full = $(localver)$(localver-auto)
799 # Store (new) KERNELRELASE string in .kernelrelease
800 kernelrelease = $(KERNELVERSION)$(localver-full)
801 .kernelrelease: FORCE
803 $(Q)echo $(kernelrelease) > $@
806 # Things we need to do before we recursively start building the kernel
807 # or the modules are listed in "prepare".
808 # A multi level approach is used. prepareN is processed before prepareN-1.
809 # archprepare is used in arch Makefiles and when processed asm symlink,
810 # version.h and scripts_basic is processed / created.
812 # Listed in dependency order
813 .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
815 # prepare-all is deprecated, use prepare as valid replacement
818 # prepare3 is used to check if we are building in a separate output directory,
820 # 1) Check that make has not been executed in the kernel src $(srctree)
821 # 2) Create the include2 directory, used for the second asm symlink
822 prepare3: .kernelrelease
823 ifneq ($(KBUILD_SRC),)
824 @echo ' Using $(srctree) as source for kernel'
825 $(Q)if [ -f $(srctree)/.config ]; then \
826 echo " $(srctree) is not clean, please run 'make mrproper'";\
827 echo " in the '$(srctree)' directory.";\
830 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
831 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
834 # prepare2 creates a makefile if using a separate output directory
835 prepare2: prepare3 outputmakefile
837 prepare1: prepare2 include/linux/version.h include/asm \
838 include/config/MARKER
839 ifneq ($(KBUILD_MODULES),)
840 $(Q)rm -rf $(MODVERDIR)
841 $(Q)mkdir -p $(MODVERDIR)
844 archprepare: prepare1 scripts_basic
846 prepare0: archprepare FORCE
847 $(Q)$(MAKE) $(build)=.
849 # All the preparing..
850 prepare prepare-all: prepare0
852 # Leave this as default for preprocessing vmlinux.lds.S, which is now
853 # done in arch/$(ARCH)/kernel/Makefile
855 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
858 # ---------------------------------------------------------------------------
860 %.s: %.c scripts FORCE
861 $(Q)$(MAKE) $(build)=$(@D) $@
862 %.i: %.c scripts FORCE
863 $(Q)$(MAKE) $(build)=$(@D) $@
864 %.o: %.c scripts FORCE
865 $(Q)$(MAKE) $(build)=$(@D) $@
867 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
868 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
869 %/: scripts prepare FORCE
870 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
871 %.lst: %.c scripts FORCE
872 $(Q)$(MAKE) $(build)=$(@D) $@
873 %.s: %.S scripts FORCE
874 $(Q)$(MAKE) $(build)=$(@D) $@
875 %.o: %.S scripts FORCE
876 $(Q)$(MAKE) $(build)=$(@D) $@
878 # FIXME: The asm symlink changes when $(ARCH) changes. That's
879 # hard to detect, but I suppose "make mrproper" is a good idea
880 # before switching between archs anyway.
883 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
884 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
885 @ln -fsn asm-$(ARCH) $@
887 # Split autoconf.h into include/linux/config/*
889 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
890 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
891 @scripts/basic/split-include include/linux/autoconf.h include/config
894 # Generate some files
895 # ---------------------------------------------------------------------------
897 # KERNELRELEASE can change from a few different places, meaning version.h
898 # needs to be updated, so this check is forced on all builds
902 define filechk_version.h
903 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
904 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
907 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
908 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
909 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
913 include/linux/version.h: $(srctree)/Makefile .config FORCE
914 $(call filechk,version.h)
916 # ---------------------------------------------------------------------------
920 @echo '*** Warning: make $@ is unnecessary now.'
922 # ---------------------------------------------------------------------------
927 # By default, build modules as well
934 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
935 @echo ' Building modules, stage 2.';
936 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
939 # Target to prepare building external modules
940 .PHONY: modules_prepare
941 modules_prepare: prepare scripts
943 # Target to install modules
944 .PHONY: modules_install
945 modules_install: _modinst_ _modinst_post
949 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
950 echo "Warning: you may need to install module-init-tools"; \
951 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
954 @rm -rf $(MODLIB)/kernel
955 @rm -f $(MODLIB)/source
956 @mkdir -p $(MODLIB)/kernel
957 @ln -s $(srctree) $(MODLIB)/source
958 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
959 rm -f $(MODLIB)/build ; \
960 ln -s $(objtree) $(MODLIB)/build ; \
962 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
964 # If System.map exists, run depmod. This deliberately does not have a
965 # dependency on System.map since that would run the dependency tree on
966 # vmlinux. This depmod is only for convenience to give the initial
967 # boot a modules.dep even before / is mounted read-write. However the
968 # boot script depmod is the master version.
969 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
972 depmod_opts := -b $(INSTALL_MOD_PATH) -r
974 .PHONY: _modinst_post
975 _modinst_post: _modinst_
976 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
978 else # CONFIG_MODULES
980 # Modules not configured
981 # ---------------------------------------------------------------------------
983 modules modules_install: FORCE
985 @echo "The present kernel configuration has modules disabled."
986 @echo "Type 'make config' and enable loadable module support."
987 @echo "Then build a kernel with module support enabled."
991 endif # CONFIG_MODULES
994 # Cleaning is done on three levels.
995 # make clean Delete most generated files
996 # Leave enough to build external modules
997 # make mrproper Delete the current configuration, and all generated files
998 # make distclean Remove editor backup files, patch leftover files and the like
1000 # Directories & files removed with 'make clean'
1001 CLEAN_DIRS += $(MODVERDIR)
1002 CLEAN_FILES += vmlinux System.map \
1003 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1005 # Directories & files removed with 'make mrproper'
1006 MRPROPER_DIRS += include/config include2
1007 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1008 include/linux/autoconf.h include/linux/version.h \
1009 .kernelrelease Module.symvers tags TAGS cscope*
1011 # clean - Delete most, but leave enough to build external modules
1013 clean: rm-dirs := $(CLEAN_DIRS)
1014 clean: rm-files := $(CLEAN_FILES)
1015 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1017 .PHONY: $(clean-dirs) clean archclean
1019 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1021 clean: archclean $(clean-dirs)
1024 @find . $(RCS_FIND_IGNORE) \
1025 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1026 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1027 -type f -print | xargs rm -f
1029 # mrproper - Delete all generated files, including .config
1031 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1032 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1033 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1035 .PHONY: $(mrproper-dirs) mrproper archmrproper
1037 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1039 mrproper: clean archmrproper $(mrproper-dirs)
1048 @find $(srctree) $(RCS_FIND_IGNORE) \
1049 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1050 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1051 -o -name '.*.rej' -o -size 0 \
1052 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1053 -type f -print | xargs rm -f
1056 # Packaging of the kernel to various formats
1057 # ---------------------------------------------------------------------------
1058 # rpm target kept for backward compatibility
1059 package-dir := $(srctree)/scripts/package
1064 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1066 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1069 # Brief documentation of the typical targets used
1070 # ---------------------------------------------------------------------------
1072 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1073 boards := $(notdir $(boards))
1076 @echo 'Cleaning targets:'
1077 @echo ' clean - remove most generated files but keep the config'
1078 @echo ' mrproper - remove all generated files + config + various backup files'
1080 @echo 'Configuration targets:'
1081 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1083 @echo 'Other generic targets:'
1084 @echo ' all - Build all targets marked with [*]'
1085 @echo '* vmlinux - Build the bare kernel'
1086 @echo '* modules - Build all modules'
1087 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1088 @echo ' dir/ - Build all files in dir and below'
1089 @echo ' dir/file.[ois] - Build specified target only'
1090 @echo ' dir/file.ko - Build module including final link'
1091 @echo ' rpm - Build a kernel as an RPM package'
1092 @echo ' tags/TAGS - Generate tags file for editors'
1093 @echo ' cscope - Generate cscope index'
1094 @echo ' kernelrelease - Output the release version string'
1095 @echo ' kernelversion - Output the version stored in Makefile'
1097 @echo 'Static analysers'
1098 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1099 @echo ' and init sections from non-init sections'
1100 @echo ' checkstack - Generate a list of stack hogs'
1101 @echo ' namespacecheck - Name space analysis on compiled kernel'
1103 @echo 'Kernel packaging:'
1104 @$(MAKE) -f $(package-dir)/Makefile help
1106 @echo 'Documentation targets:'
1107 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1109 @echo 'Architecture specific targets ($(ARCH)):'
1110 @$(if $(archhelp),$(archhelp),\
1111 echo ' No architecture specific help defined for $(ARCH)')
1114 $(foreach b, $(boards), \
1115 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1118 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1119 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1120 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1121 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1123 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1124 @echo 'For further info see the ./README file'
1127 # Documentation targets
1128 # ---------------------------------------------------------------------------
1129 %docs: scripts_basic FORCE
1130 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1132 else # KBUILD_EXTMOD
1135 # External module support.
1136 # When building external modules the kernel used as basis is considered
1137 # read-only, and no consistency checks are made and the make
1138 # system is not used on the basis kernel. If updates are required
1139 # in the basis kernel ordinary make commands (without M=...) must
1142 # The following are the only valid targets when building external
1144 # make M=dir clean Delete all automatically generated files
1145 # make M=dir modules Make all modules in specified dir
1146 # make M=dir Same as 'make M=dir modules'
1147 # make M=dir modules_install
1148 # Install the modules build in the module directory
1149 # Assumes install directory is already created
1151 # We are always building modules
1155 $(Q)mkdir -p $(MODVERDIR)
1157 .PHONY: $(objtree)/Module.symvers
1158 $(objtree)/Module.symvers:
1159 @test -e $(objtree)/Module.symvers || ( \
1161 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1162 echo " is missing; modules will have no dependencies and modversions."; \
1165 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1166 .PHONY: $(module-dirs) modules
1167 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1168 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1170 modules: $(module-dirs)
1171 @echo ' Building modules, stage 2.';
1172 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1174 .PHONY: modules_install
1176 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1178 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1180 .PHONY: $(clean-dirs) clean
1182 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1184 clean: rm-dirs := $(MODVERDIR)
1185 clean: $(clean-dirs)
1187 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1188 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1189 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1190 -type f -print | xargs rm -f
1193 @echo ' Building external modules.'
1194 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1196 @echo ' modules - default target, build the module(s)'
1197 @echo ' modules_install - install the module'
1198 @echo ' clean - remove generated files in module directory only'
1200 endif # KBUILD_EXTMOD
1202 # Generate tags for editors
1203 # ---------------------------------------------------------------------------
1205 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1206 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1207 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1209 ifeq ($(src),$(obj))
1212 __srctree = $(srctree)/
1215 ifeq ($(ALLSOURCE_ARCHS),)
1217 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1219 ALLINCLUDE_ARCHS := $(ARCH)
1222 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1223 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1226 ALLSOURCE_ARCHS := $(ARCH)
1229 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1230 \( -name include -o -name arch \) -prune -o \
1231 -name '*.[chS]' -print; \
1232 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1233 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1234 -name '*.[chS]' -print; \
1236 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1237 -name '*.[chS]' -print; \
1238 find $(__srctree)include $(RCS_FIND_IGNORE) \
1239 \( -name config -o -name 'asm-*' \) -prune \
1240 -o -name '*.[chS]' -print; \
1241 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1242 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1243 -name '*.[chS]' -print; \
1245 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1246 -name '*.[chS]' -print )
1249 quiet_cmd_cscope-file = FILELST cscope.files
1250 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1252 quiet_cmd_cscope = MAKE cscope.out
1253 cmd_cscope = cscope -b
1256 $(call cmd,cscope-file)
1259 quiet_cmd_TAGS = MAKE $@
1262 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1263 echo "-I __initdata,__exitdata,__acquires,__releases \
1264 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1265 --extra=+f --c-kinds=+px"`; \
1266 $(all-sources) | xargs etags $$ETAGSF -a
1273 quiet_cmd_tags = MAKE $@
1276 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1277 echo "-I __initdata,__exitdata,__acquires,__releases \
1278 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1279 --extra=+f --c-kinds=+px"`; \
1280 $(all-sources) | xargs ctags $$CTAGSF -a
1287 # Scripts to check various things for consistency
1288 # ---------------------------------------------------------------------------
1291 find * $(RCS_FIND_IGNORE) \
1292 -name '*.[hcS]' -type f -print | sort \
1293 | xargs $(PERL) -w scripts/checkincludes.pl
1296 find * $(RCS_FIND_IGNORE) \
1297 -name '*.[hcS]' -type f -print | sort \
1298 | xargs $(PERL) -w scripts/checkversion.pl
1301 $(PERL) $(srctree)/scripts/reference_discarded.pl
1302 $(PERL) $(srctree)/scripts/reference_init.pl
1305 $(PERL) $(srctree)/scripts/namespace.pl
1307 endif #ifeq ($(config-targets),1)
1308 endif #ifeq ($(mixed-targets),1)
1312 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1313 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1316 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1317 $(error kernelrelease not valid - run 'make *config' to update it))
1319 @echo $(KERNELVERSION)
1321 # FIXME Should go into a make.lib or something
1322 # ===========================================================================
1324 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1325 cmd_rmdirs = rm -rf $(rm-dirs)
1327 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1328 cmd_rmfiles = rm -f $(rm-files)
1331 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1332 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1333 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1335 quiet_cmd_as_o_S = AS $@
1336 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1338 # read all saved command lines
1340 targets := $(wildcard $(sort $(targets)))
1341 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1343 ifneq ($(cmd_files),)
1344 $(cmd_files): ; # Do not try to update included dependency files
1345 include $(cmd_files)
1348 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1350 # $(Q)$(MAKE) $(clean)=dir
1351 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1353 endif # skip-makefile