9 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README
11 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel reading this file.
14 # Do not print "Entering directory ..."
15 MAKEFLAGS += --no-print-directory
17 # We are using a recursive build, so we need to do a little thinking
18 # to get the ordering right.
20 # Most importantly: sub-Makefiles should only ever modify files in
21 # their own directory. If in some directory we have a dependency on
22 # a file in another dir (which doesn't happen often, but it's often
23 # unavoidable when linking the built-in.o targets which finally
24 # turn into vmlwk), we will call a sub make in that other dir, and
25 # after that we are sure that everything which is in that other dir
28 # The only cases where we need to modify files which have global
29 # effects are thus separated out and done before the recursive
30 # descending is started. They are now explicitly listed as the
33 # To put more focus on warnings, be less verbose as default
34 # Use 'make V=1' to see the full commands
37 ifeq ("$(origin V)", "command line")
45 # Call sparse as part of compilation of C files
46 # Use 'make C=1' to enable sparse checking
49 ifeq ("$(origin C)", "command line")
50 KBUILD_CHECKSRC = $(C)
53 ifndef KBUILD_CHECKSRC
57 # Use make M=dir to specify directory of external module to build
58 # Old syntax make ... SUBDIRS=$PWD is still supported
59 # Setting the environment variable KBUILD_EXTMOD take precedence
61 KBUILD_EXTMOD ?= $(SUBDIRS)
64 ifeq ("$(origin M)", "command line")
70 # kbuild supports saving output files in a separate directory.
71 # To locate output files in a separate directory two syntaxes are supported.
72 # In both cases the working directory must be the root of the kernel src.
74 # Use "make O=dir/to/store/output/files/"
76 # 2) Set KBUILD_OUTPUT
77 # Set the environment variable KBUILD_OUTPUT to point to the directory
78 # where the output files shall be placed.
79 # export KBUILD_OUTPUT=dir/to/store/output/files/
82 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
86 # KBUILD_SRC is set on invocation of make in OBJ directory
87 # KBUILD_SRC is not intended to be used by the regular user (for now)
90 # OK, Make called in directory where kernel src resides
91 # Do we want to locate output files in a separate directory?
93 ifeq ("$(origin O)", "command line")
98 # That's our default target when none is given on the command line
102 ifneq ($(KBUILD_OUTPUT),)
103 # Invoke a second make in the output directory, passing relevant variables
104 # check that the output directory actually exists
105 saved-output := $(KBUILD_OUTPUT)
106 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
107 $(if $(KBUILD_OUTPUT),, \
108 $(error output directory "$(saved-output)" does not exist))
110 PHONY += $(MAKECMDGOALS)
112 $(filter-out _all,$(MAKECMDGOALS)) _all:
113 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
114 KBUILD_SRC=$(CURDIR) \
115 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
117 # Leave processing to above invocation of make
119 endif # ifneq ($(KBUILD_OUTPUT),)
120 endif # ifeq ($(KBUILD_SRC),)
122 # We process the rest of the Makefile if this is the final invocation of make
123 ifeq ($(skip-makefile),)
125 # If building an external module we do not care about the all: rule
126 # but instead _all depend on modules
128 ifeq ($(KBUILD_EXTMOD),)
134 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
136 # FIXME - TOPDIR is obsolete, use srctree/objtree
141 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
143 export srctree objtree VPATH TOPDIR
146 # SUBARCH tells the usermode build what the underlying arch is. That is set
147 # first, and if a usermode build is happening, the "ARCH=um" on the command
148 # line overrides the setting of ARCH below. If a native build is happening,
149 # then ARCH is assigned, getting whatever value it gets normally, and
150 # SUBARCH is subsequently ignored.
152 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
153 -e s/arm.*/arm/ -e s/sa110/arm/ \
154 -e s/s390x/s390/ -e s/parisc64/parisc/ \
155 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
157 # Cross compiling and selecting different set of gcc/bin-utils
158 # ---------------------------------------------------------------------------
160 # When performing cross compilation for other architectures ARCH shall be set
161 # to the target architecture. (See arch/* for the possibilities).
162 # ARCH can be set during invocation of make:
164 # Another way is to have ARCH set in the environment.
165 # The default ARCH is the host where make is executed.
167 # CROSS_COMPILE specify the prefix used for all executables used
168 # during compilation. Only gcc and related bin-utils executables
169 # are prefixed with $(CROSS_COMPILE).
170 # CROSS_COMPILE can be set on the command line
171 # make CROSS_COMPILE=ia64-linux-
172 # Alternatively CROSS_COMPILE can be set in the environment.
173 # Default value for CROSS_COMPILE is not to prefix executables
174 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
179 # Architecture as present in compile.h
180 UTS_MACHINE := $(ARCH)
182 # SHELL used by kbuild
183 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
184 else if [ -x /bin/bash ]; then echo /bin/bash; \
185 else echo sh; fi ; fi)
189 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
192 # Decide whether to build built-in, modular, or both.
193 # Normally, just do built-in.
198 # If we have only "make modules", don't compile built-in objects.
199 # When we're building modules with modversions, we need to consider
200 # the built-in objects during the descend as well, in order to
201 # make sure the checksums are uptodate before we record them.
203 ifeq ($(MAKECMDGOALS),modules)
204 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
207 # If we have "make <whatever> modules", compile modules
208 # in addition to whatever we do anyway.
209 # Just "make" or "make all" shall build modules as well
211 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
215 ifeq ($(MAKECMDGOALS),)
219 export KBUILD_MODULES KBUILD_BUILTIN
220 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
223 # ---------------------------------------------------------------------------
225 # Normally, we echo the whole command before executing it. By making
226 # that echo $($(quiet)$(cmd)), we now have the possibility to set
227 # $(quiet) to choose other forms of output instead, e.g.
229 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
230 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
232 # If $(quiet) is empty, the whole command will be printed.
233 # If it is set to "quiet_", only the short version will be printed.
234 # If it is set to "silent_", nothing wil be printed at all, since
235 # the variable $(silent_cmd_cc_o_c) doesn't exist.
237 # A simple variant is to prefix commands with $(Q) - that's useful
238 # for commands that shall be hidden in non-verbose mode.
242 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
243 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
245 ifeq ($(KBUILD_VERBOSE),1)
253 # If the user is running make -s (silent mode), suppress echoing of
256 ifneq ($(findstring s,$(MAKEFLAGS)),)
260 export quiet Q KBUILD_VERBOSE
263 # Look for make include files relative to root of kernel src
264 MAKEFLAGS += --include-dir=$(srctree)
266 # We need some generic definitions
267 include $(srctree)/scripts/Kbuild.include
269 # For maximum performance (+ possibly random breakage, uncomment
274 # Make variables (CC, etc...)
276 AS = $(CROSS_COMPILE)as
277 LD = $(CROSS_COMPILE)ld
278 CC = $(CROSS_COMPILE)gcc
280 AR = $(CROSS_COMPILE)ar
281 NM = $(CROSS_COMPILE)nm
282 STRIP = $(CROSS_COMPILE)strip
283 OBJCOPY = $(CROSS_COMPILE)objcopy
284 OBJDUMP = $(CROSS_COMPILE)objdump
286 GENKSYMS = scripts/genksyms/genksyms
287 DEPMOD = /sbin/depmod
288 KALLSYMS = scripts/kallsyms
292 CHECKFLAGS := -D__lwk__ -Dlwk -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
294 CFLAGS_MODULE = $(MODFLAGS)
295 AFLAGS_MODULE = $(MODFLAGS)
301 # Use LWKINCLUDE when you must reference the include/ directory.
302 # Needed to be compatible with the O= option
303 LWKINCLUDE := -Iinclude \
304 -I../palacios/include \
305 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
306 -include include/lwk/autoconf.h
308 CPPFLAGS := -D__KERNEL__ $(LWKINCLUDE)
310 CFLAGS := -std=gnu99 \
311 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
312 -fno-strict-aliasing -fno-common
314 ifeq ($(call cc-option-yn, -fstack-protector),y)
315 CFLAGS += -fno-stack-protector
318 ifeq ($(call cc-option-yn, -fgnu89-inline),y)
319 CFLAGS += -fgnu89-inline
322 AFLAGS := -D__ASSEMBLY__
324 # Read KERNELRELEASE from .kernelrelease (if it exists)
325 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
326 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
328 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
329 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
330 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
331 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
333 export CPPFLAGS NOSTDINC_FLAGS LWKINCLUDE OBJCOPYFLAGS LDFLAGS
334 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
335 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
337 # When compiling out-of-tree modules, put MODVERDIR in the module
338 # tree rather than in the kernel tree. The kernel tree might
340 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
342 # Files to ignore in find ... statements
344 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
345 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
347 # ===========================================================================
348 # Rules shared between *config targets and build targets
350 # Basic helpers built in scripts/
351 PHONY += scripts_basic
353 $(Q)$(MAKE) $(build)=scripts/basic
355 # To avoid any implicit rule to kick in, define an empty command.
356 scripts/basic/%: scripts_basic ;
358 PHONY += outputmakefile
359 # outputmakefile generates a Makefile in the output directory, if using a
360 # separate output directory. This allows convenient use of make in the
363 ifneq ($(KBUILD_SRC),)
364 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
365 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
368 # To make sure we do not include .config for any of the *config targets
369 # catch them early, and hand them over to scripts/kconfig/Makefile
370 # It is allowed to specify more targets when calling make, including
371 # mixing *config targets and build targets.
372 # For example 'make oldconfig all'.
373 # Detect when mixed targets is specified, and make a second invocation
374 # of make so .config is not included in this case either (for *config).
376 no-dot-config-targets := clean mrproper distclean \
377 cscope TAGS tags help %docs check%
383 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
384 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
389 ifeq ($(KBUILD_EXTMOD),)
390 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
392 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
398 ifeq ($(mixed-targets),1)
399 # ===========================================================================
400 # We're called with mixed targets (*config and build targets).
401 # Handle them one by one.
404 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
407 ifeq ($(config-targets),1)
408 # ===========================================================================
409 # *config targets only - make sure prerequisites are updated, and descend
410 # in scripts/kconfig to make the *config target
412 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
413 # KBUILD_DEFCONFIG may point out an alternative default configuration
414 # used for 'make defconfig'
415 include $(srctree)/arch/$(ARCH)/Makefile
416 export KBUILD_DEFCONFIG
418 config %config: scripts_basic outputmakefile FORCE
419 $(Q)mkdir -p include/lwk
420 $(Q)$(MAKE) $(build)=scripts/kconfig $@
421 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
424 # ===========================================================================
425 # Build targets only - this includes vmlwk, arch specific targets, clean
426 # targets and others. In general all targets except *config targets.
428 ifeq ($(KBUILD_EXTMOD),)
429 # Additional helpers built in scripts/
430 # Carefully list dependencies so we do not try to build scripts twice
433 scripts: scripts_basic include/config/MARKER
434 $(Q)$(MAKE) $(build)=$(@)
436 scripts_basic: include/lwk/autoconf.h
438 # Objects we will link into vmlwk / subdirs we need to visit
440 drivers-y := drivers/
444 endif # KBUILD_EXTMOD
446 ifeq ($(dot-config),1)
447 # In this section, we need .config
449 # Read in dependencies to all Kconfig* files, make sure to run
450 # oldconfig if changes are detected.
455 # If .config needs to be updated, it will be done via the dependency
456 # that autoconf has on .config.
457 # To avoid any implicit rule to kick in, define an empty command
458 .config .kconfig.d: ;
460 # If .config is newer than include/lwk/autoconf.h, someone tinkered
461 # with it and forgot to run make oldconfig.
462 # If kconfig.d is missing then we are probarly in a cleaned tree so
463 # we execute the config step to be sure to catch updated Kconfig files
464 include/lwk/autoconf.h: .kconfig.d .config
465 $(Q)mkdir -p include/lwk
466 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
468 # Dummy target needed, because used as prerequisite
469 include/lwk/autoconf.h: ;
472 DEFAULT_EXTRA_TARGETS=vmlwk.bin vmlwk.asm init_task
474 # The all: target is the default when no target is given on the
476 # This allow a user to issue only 'make' to build a kernel including modules
477 # Defaults vmlwk but it is usually overriden in the arch makefile
478 all: vmlwk $(DEFAULT_EXTRA_TARGETS)
480 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
486 ifdef CONFIG_FRAME_POINTER
487 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
489 CFLAGS += -fomit-frame-pointer
492 ifdef CONFIG_UNWIND_INFO
493 CFLAGS += -fasynchronous-unwind-tables
496 ifdef CONFIG_DEBUG_INFO
500 include $(srctree)/arch/$(ARCH)/Makefile
502 # arch Makefile may override CC so keep this after arch Makefile is included
503 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
504 CHECKFLAGS += $(NOSTDINC_FLAGS)
506 # disable pointer signedness warnings in gcc 4.0
507 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
509 # Default kernel image to build when no specific target is given.
510 # KBUILD_IMAGE may be overruled on the commandline or
511 # set in the environment
512 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
514 export KBUILD_IMAGE ?= vmlwk
517 # INSTALL_PATH specifies where to place the updated kernel and system map
518 # images. Default is /boot, but you can set it to other values
519 export INSTALL_PATH ?= /boot
522 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
523 # relocations required by build roots. This is not defined in the
524 # makefile but the arguement can be passed to make if needed.
527 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
531 ifeq ($(KBUILD_EXTMOD),)
532 #core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
533 core-y += kernel/ mm/
535 vmlwk-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
536 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
537 $(net-y) $(net-m) $(libs-y) $(libs-m)))
539 vmlwk-alldirs := $(sort $(vmlwk-dirs) $(patsubst %/,%,$(filter %/, \
541 $(core-n) $(core-) $(drivers-n) $(drivers-) \
542 $(net-n) $(net-) $(libs-n) $(libs-))))
544 init-y := $(patsubst %/, %/built-in.o, $(init-y))
545 core-y := $(patsubst %/, %/built-in.o, $(core-y))
546 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
547 net-y := $(patsubst %/, %/built-in.o, $(net-y))
548 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
549 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
550 libs-y := $(libs-y1) $(libs-y2)
552 libs-$(CONFIG_V3VEE) += palacios/libv3vee.a
553 libs-$(CONFIG_V3VEE) += palacios/libxed32e.a
556 # ---------------------------------------------------------------------------
557 # vmlwk is build from the objects selected by $(vmlwk-init) and
558 # $(vmlwk-main). Most are built-in.o files from top-level directories
559 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
560 # Ordering when linking is important, and $(vmlwk-init) must be first.
566 # | +--< init/version.o + more
569 # | +--< driver/built-in.o mm/built-in.o + more
571 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
573 # vmlwk version (uname -v) cannot be updated during normal
574 # descending-into-subdirs phase since we do not yet know if we need to
576 # Therefore this step is delayed until just before final link of vmlwk -
577 # except in the kallsyms case where it is done just before adding the
578 # symbols to the kernel.
580 # System.map is generated to document addresses of all kernel symbols
582 vmlwk-init := $(head-y) $(init-y)
583 vmlwk-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
584 vmlwk-all := $(vmlwk-init) $(vmlwk-main)
585 vmlwk-lds := arch/$(ARCH)/kernel/vmlwk.lds
587 # Rule to link vmlwk - also used during CONFIG_KALLSYMS
588 # May be overridden by arch/$(ARCH)/Makefile
589 quiet_cmd_vmlwk__ ?= LD $@
590 cmd_vmlwk__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlwk) -o $@ \
591 -T $(vmlwk-lds) $(vmlwk-init) \
592 --start-group $(vmlwk-main) --end-group \
593 $(filter-out $(vmlwk-lds) $(vmlwk-init) $(vmlwk-main) FORCE ,$^)
595 # Generate new vmlwk version
596 quiet_cmd_vmlwk_version = GEN .version
597 cmd_vmlwk_version = set -e; \
598 if [ ! -r .version ]; then \
602 mv .version .old_version; \
603 expr 0$$(cat .old_version) + 1 >.version; \
605 $(MAKE) $(build)=init
607 # Generate System.map
608 quiet_cmd_sysmap = SYSMAP
609 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
612 # If CONFIG_KALLSYMS is set .version is already updated
613 # Generate System.map and verify that the content is consistent
614 # Use + in front of the vmlwk_version rule to silent warning with make -j2
615 # First command is ':' to allow us to use + in front of the rule
618 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlwk_version))
621 $(Q)echo 'cmd_$@ := $(cmd_vmlwk__)' > $(@D)/.$(@F).cmd
623 $(Q)$(if $($(quiet)cmd_sysmap), \
624 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
625 $(cmd_sysmap) $@ System.map; \
626 if [ $$? -ne 0 ]; then \
634 ifdef CONFIG_KALLSYMS
635 # Generate section listing all symbols and add it into vmlwk $(kallsyms.o)
636 # It's a three stage process:
637 # o .tmp_vmlwk1 has all symbols and sections, but __kallsyms is
639 # Running kallsyms on that gives us .tmp_kallsyms1.o with
640 # the right size - vmlwk version (uname -v) is updated during this step
641 # o .tmp_vmlwk2 now has a __kallsyms section of the right size,
642 # but due to the added section, some addresses have shifted.
643 # From here, we generate a correct .tmp_kallsyms2.o
644 # o The correct .tmp_kallsyms2.o is linked into the final vmlwk.
645 # o Verify that the System.map from vmlwk matches the map from
646 # .tmp_vmlwk2, just in case we did not generate kallsyms correctly.
647 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
648 # .tmp_vmlwk3 and .tmp_kallsyms3.o. This is only meant as a
649 # temporary bypass to allow the kernel to be built while the
650 # maintainers work out what went wrong with kallsyms.
652 ifdef CONFIG_KALLSYMS_EXTRA_PASS
658 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
660 define verify_kallsyms
661 $(Q)$(if $($(quiet)cmd_sysmap), \
662 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
663 $(cmd_sysmap) .tmp_vmlwk$(last_kallsyms) .tmp_System.map
664 $(Q)cmp -s System.map .tmp_System.map || \
665 (echo Inconsistent kallsyms data; \
666 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
667 rm .tmp_kallsyms* ; /bin/false )
670 # Update vmlwk version before link
671 # Use + in front of this rule to silent warning about make -j1
672 # First command is ':' to allow us to use + in front of this rule
673 cmd_ksym_ld = $(cmd_vmlwk__)
676 +$(call cmd,vmlwk_version)
678 $(Q)echo 'cmd_$@ := $(cmd_vmlwk__)' > $(@D)/.$(@F).cmd
681 # Generate .S file with all kernel symbols
682 quiet_cmd_kallsyms = KSYM $@
683 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
684 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
686 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
687 $(call if_changed_dep,as_o_S)
689 .tmp_kallsyms%.S: .tmp_vmlwk% $(KALLSYMS)
692 # .tmp_vmlwk1 must be complete except kallsyms, so update vmlwk version
693 .tmp_vmlwk1: $(vmlwk-lds) $(vmlwk-all) FORCE
694 $(call if_changed_rule,ksym_ld)
696 .tmp_vmlwk2: $(vmlwk-lds) $(vmlwk-all) .tmp_kallsyms1.o FORCE
697 $(call if_changed,vmlwk__)
699 .tmp_vmlwk3: $(vmlwk-lds) $(vmlwk-all) .tmp_kallsyms2.o FORCE
700 $(call if_changed,vmlwk__)
702 # Needs to visit scripts/ before $(KALLSYMS) can be used.
703 $(KALLSYMS): scripts ;
705 # Generate some data for debugging strange kallsyms problems
706 debug_kallsyms: .tmp_map$(last_kallsyms)
708 .tmp_map%: .tmp_vmlwk% FORCE
709 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
715 endif # ifdef CONFIG_KALLSYMS
717 # vmlwk image - including updated kernel symbols
718 vmlwk: $(vmlwk-lds) $(vmlwk-init) $(vmlwk-main) $(kallsyms.o) FORCE
719 $(call if_changed_rule,vmlwk__)
720 $(Q)rm -f .old_version
722 vmlwk.bin: vmlwk FORCE
723 $(OBJCOPY) -O binary $< $@
726 $(OBJDUMP) --disassemble $< > $@
728 # The actual objects are generated when descending,
729 # make sure no implicit rule kicks in
730 $(sort $(vmlwk-init) $(vmlwk-main)) $(vmlwk-lds): $(vmlwk-dirs) ;
732 # Handle descending into subdirectories listed in $(vmlwk-dirs)
733 # Preset locale variables to speed up the build process. Limit locale
734 # tweaks to this spot to avoid wrong language settings when running
735 # make menuconfig etc.
736 # Error messages still appears in the original language
738 PHONY += $(vmlwk-dirs)
739 $(vmlwk-dirs): prepare scripts
740 $(Q)$(MAKE) $(build)=$@
742 # Build the kernel release string
743 # The KERNELRELEASE is stored in a file named .kernelrelease
744 # to be used when executing for example make install or make modules_install
746 # Take the contents of any files called localversion* and the config
747 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
748 # LOCALVERSION from the command line override all of this
751 space := $(nullstring) # end of line
753 ___localver = $(objtree)/localversion* $(srctree)/localversion*
754 __localver = $(sort $(wildcard $(___localver)))
755 # skip backup files (containing '~')
756 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
758 localver = $(subst $(space),, \
759 $(shell cat /dev/null $(_localver)) \
760 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
762 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
763 # and if the SCM is know a tag from the SCM is appended.
764 # The appended tag is determinded by the SCM used.
766 # Currently, only git is supported.
767 # Other SCMs can edit scripts/setlocalversion and add the appropriate
769 ifdef CONFIG_LOCALVERSION_AUTO
770 _localver-auto = $(shell $(CONFIG_SHELL) \
771 $(srctree)/scripts/setlocalversion $(srctree))
772 localver-auto = $(LOCALVERSION)$(_localver-auto)
775 localver-full = $(localver)$(localver-auto)
777 # Store (new) KERNELRELASE string in .kernelrelease
778 kernelrelease = $(KERNELVERSION)$(localver-full)
779 .kernelrelease: FORCE
781 $(Q)echo $(kernelrelease) > $@
784 # Things we need to do before we recursively start building the kernel
785 # or the modules are listed in "prepare".
786 # A multi level approach is used. prepareN is processed before prepareN-1.
787 # archprepare is used in arch Makefiles and when processed arch symlink,
788 # version.h and scripts_basic is processed / created.
790 # Listed in dependency order
791 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
793 # prepare-all is deprecated, use prepare as valid replacement
796 # prepare3 is used to check if we are building in a separate output directory,
798 # 1) Check that make has not been executed in the kernel src $(srctree)
799 # 2) Create the include2 directory, used for the second arch symlink
800 prepare3: .kernelrelease
801 ifneq ($(KBUILD_SRC),)
802 @echo ' Using $(srctree) as source for kernel'
803 $(Q)if [ -f $(srctree)/.config ]; then \
804 echo " $(srctree) is not clean, please run 'make mrproper'";\
805 echo " in the '$(srctree)' directory.";\
808 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
809 $(Q)ln -fsn $(srctree)/include/arch-$(ARCH) include2/arch
812 # prepare2 creates a makefile if using a separate output directory
813 prepare2: prepare3 outputmakefile
815 prepare1: prepare2 include/lwk/version.h include/arch \
816 include/config/MARKER
817 ifneq ($(KBUILD_MODULES),)
818 $(Q)mkdir -p $(MODVERDIR)
819 $(Q)rm -f $(MODVERDIR)/*
822 archprepare: prepare1 scripts_basic
824 prepare0: archprepare FORCE
825 $(Q)$(MAKE) $(build)=.
827 # All the preparing..
828 prepare prepare-all: prepare0
830 # Leave this as default for preprocessing vmlwk.lds.S, which is now
831 # done in arch/$(ARCH)/kernel/Makefile
833 export CPPFLAGS_vmlwk.lds += -P -C -U$(ARCH)
835 # FIXME: The arch symlink changes when $(ARCH) changes. That's
836 # hard to detect, but I suppose "make mrproper" is a good idea
837 # before switching between archs anyway.
840 @echo ' SYMLINK $@ -> include/arch-$(ARCH)'
841 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
842 @ln -fsn arch-$(ARCH) $@
844 # Split autoconf.h into include/lwk/config/*
846 include/config/MARKER: scripts/basic/split-include include/lwk/autoconf.h
847 @echo ' SPLIT include/lwk/autoconf.h -> include/config/*'
848 @scripts/basic/split-include include/lwk/autoconf.h include/config
851 # Generate some files
852 # ---------------------------------------------------------------------------
854 # KERNELRELEASE can change from a few different places, meaning version.h
855 # needs to be updated, so this check is forced on all builds
859 define filechk_version.h
860 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
861 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
864 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
865 echo \#define LWK_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
866 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
870 include/lwk/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
871 $(call filechk,version.h)
873 # ---------------------------------------------------------------------------
877 @echo '*** Warning: make $@ is unnecessary now.'
879 # ---------------------------------------------------------------------------
881 INSTALL_HDR_PATH=$(MODLIB)/abi
882 export INSTALL_HDR_PATH
884 PHONY += headers_install
885 headers_install: include/lwk/version.h
886 $(Q)unifdef -Ux /dev/null
887 $(Q)rm -rf $(INSTALL_HDR_PATH)/include
888 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include
890 PHONY += headers_check
891 headers_check: headers_install
892 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
894 # ---------------------------------------------------------------------------
899 # By default, build modules as well
906 modules: $(vmlwk-dirs) $(if $(KBUILD_BUILTIN),vmlwk)
907 @echo ' Building modules, stage 2.';
908 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
911 # Target to prepare building external modules
912 PHONY += modules_prepare
913 modules_prepare: prepare scripts
915 # Target to install modules
916 PHONY += modules_install
917 modules_install: _modinst_ _modinst_post
921 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
922 echo "Warning: you may need to install module-init-tools"; \
923 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
926 @rm -rf $(MODLIB)/kernel
927 @rm -f $(MODLIB)/source
928 @mkdir -p $(MODLIB)/kernel
929 @ln -s $(srctree) $(MODLIB)/source
930 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
931 rm -f $(MODLIB)/build ; \
932 ln -s $(objtree) $(MODLIB)/build ; \
934 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
936 # If System.map exists, run depmod. This deliberately does not have a
937 # dependency on System.map since that would run the dependency tree on
938 # vmlwk. This depmod is only for convenience to give the initial
939 # boot a modules.dep even before / is mounted read-write. However the
940 # boot script depmod is the master version.
941 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
944 depmod_opts := -b $(INSTALL_MOD_PATH) -r
946 PHONY += _modinst_post
947 _modinst_post: _modinst_
948 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
950 else # CONFIG_MODULES
952 # Modules not configured
953 # ---------------------------------------------------------------------------
955 modules modules_install: FORCE
957 @echo "The present kernel configuration has modules disabled."
958 @echo "Type 'make config' and enable loadable module support."
959 @echo "Then build a kernel with module support enabled."
963 endif # CONFIG_MODULES
966 # Cleaning is done on three levels.
967 # make clean Delete most generated files
968 # Leave enough to build external modules
969 # make mrproper Delete the current configuration, and all generated files
970 # make distclean Remove editor backup files, patch leftover files and the like
972 # Directories & files removed with 'make clean'
973 CLEAN_DIRS += $(MODVERDIR)
974 CLEAN_FILES += vmlwk System.map vmlwk.bin vmlwk.asm \
975 .tmp_kallsyms* .tmp_version .tmp_vmlwk* .tmp_System.map
977 # Directories & files removed with 'make mrproper'
978 MRPROPER_DIRS += include/config include2
979 MRPROPER_FILES += .config .config.old include/arch .version .old_version \
980 include/lwk/autoconf.h include/lwk/version.h \
981 .kernelrelease Module.symvers tags TAGS cscope*
983 # clean - Delete most, but leave enough to build external modules
985 clean: rm-dirs := $(CLEAN_DIRS)
986 clean: rm-files := $(CLEAN_FILES)
987 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlwk-alldirs))
989 PHONY += $(clean-dirs) clean archclean
991 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
993 clean: archclean $(clean-dirs)
996 @find . $(RCS_FIND_IGNORE) \
997 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
998 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
999 -type f -print | xargs rm -f
1002 # mrproper - Delete all generated files, including .config
1004 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1005 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1006 #mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1007 mrproper-dirs := $(addprefix _mrproper_, scripts)
1009 PHONY += $(mrproper-dirs) mrproper archmrproper
1011 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1013 mrproper: clean archmrproper $(mrproper-dirs)
1022 @find $(srctree) $(RCS_FIND_IGNORE) \
1023 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1024 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1025 -o -name '.*.rej' -o -size 0 \
1026 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1027 -type f -print | xargs rm -f
1030 # Packaging of the kernel to various formats
1031 # ---------------------------------------------------------------------------
1032 # rpm target kept for backward compatibility
1033 package-dir := $(srctree)/scripts/package
1036 $(Q)$(MAKE) $(build)=$(package-dir) $@
1038 $(Q)$(MAKE) $(build)=$(package-dir) $@
1041 # Brief documentation of the typical targets used
1042 # ---------------------------------------------------------------------------
1044 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1045 boards := $(notdir $(boards))
1048 @echo 'Cleaning targets:'
1049 @echo ' clean - remove most generated files but keep the config'
1050 @echo ' mrproper - remove all generated files + config + various backup files'
1052 @echo 'Configuration targets:'
1053 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1055 @echo 'Other generic targets:'
1056 @echo ' all - Build all targets marked with [*]'
1057 @echo '* vmllwk - Build the bare kernel'
1058 @echo '* modules - Build all modules'
1059 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1060 @echo ' dir/ - Build all files in dir and below'
1061 @echo ' dir/file.[ois] - Build specified target only'
1062 @echo ' dir/file.ko - Build module including final link'
1063 @echo ' rpm - Build a kernel as an RPM package'
1064 @echo ' tags/TAGS - Generate tags file for editors'
1065 @echo ' cscope - Generate cscope index'
1066 @echo ' kernelrelease - Output the release version string'
1067 @echo ' kernelversion - Output the version stored in Makefile'
1068 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
1069 @echo ' (default: /lib/modules/$$VERSION/abi)'
1071 @echo 'Static analysers'
1072 @echo ' checkstack - Generate a list of stack hogs'
1073 @echo ' namespacecheck - Name space analysis on compiled kernel'
1075 @echo 'Kernel packaging:'
1076 @$(MAKE) $(build)=$(package-dir) help
1078 @echo 'Documentation targets:'
1079 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1081 @echo 'Architecture specific targets ($(ARCH)):'
1082 @$(if $(archhelp),$(archhelp),\
1083 echo ' No architecture specific help defined for $(ARCH)')
1086 $(foreach b, $(boards), \
1087 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1090 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1091 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1092 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1093 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1095 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1096 @echo 'For further info see the ./README file'
1099 # Documentation targets
1100 # ---------------------------------------------------------------------------
1101 %docs: scripts_basic FORCE
1102 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1104 else # KBUILD_EXTMOD
1107 # External module support.
1108 # When building external modules the kernel used as basis is considered
1109 # read-only, and no consistency checks are made and the make
1110 # system is not used on the basis kernel. If updates are required
1111 # in the basis kernel ordinary make commands (without M=...) must
1114 # The following are the only valid targets when building external
1116 # make M=dir clean Delete all automatically generated files
1117 # make M=dir modules Make all modules in specified dir
1118 # make M=dir Same as 'make M=dir modules'
1119 # make M=dir modules_install
1120 # Install the modules build in the module directory
1121 # Assumes install directory is already created
1123 # We are always building modules
1125 PHONY += crmodverdir
1127 $(Q)mkdir -p $(MODVERDIR)
1128 $(Q)rm -f $(MODVERDIR)/*
1130 PHONY += $(objtree)/Module.symvers
1131 $(objtree)/Module.symvers:
1132 @test -e $(objtree)/Module.symvers || ( \
1134 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1135 echo " is missing; modules will have no dependencies and modversions."; \
1138 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1139 PHONY += $(module-dirs) modules
1140 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1141 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1143 modules: $(module-dirs)
1144 @echo ' Building modules, stage 2.';
1145 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1147 PHONY += modules_install
1148 modules_install: _emodinst_ _emodinst_post
1150 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1153 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1154 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1156 # Run depmod only is we have System.map and depmod is executable
1157 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1158 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1159 $(DEPMOD) -ae -F System.map \
1160 $(if $(strip $(INSTALL_MOD_PATH)), \
1161 -b $(INSTALL_MOD_PATH) -r) \
1165 PHONY += _emodinst_post
1166 _emodinst_post: _emodinst_
1169 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1171 PHONY += $(clean-dirs) clean
1173 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1175 clean: rm-dirs := $(MODVERDIR)
1176 clean: $(clean-dirs)
1178 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1179 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1180 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1181 -type f -print | xargs rm -f
1184 @echo ' Building external modules.'
1185 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1187 @echo ' modules - default target, build the module(s)'
1188 @echo ' modules_install - install the module'
1189 @echo ' clean - remove generated files in module directory only'
1193 PHONY += prepare scripts
1196 endif # KBUILD_EXTMOD
1198 # Generate tags for editors
1199 # ---------------------------------------------------------------------------
1201 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1202 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1203 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1205 ifeq ($(src),$(obj))
1208 __srctree = $(srctree)/
1211 ifeq ($(ALLSOURCE_ARCHS),)
1213 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1215 ALLINCLUDE_ARCHS := $(ARCH)
1218 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1219 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1222 ALLSOURCE_ARCHS := $(ARCH)
1225 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1226 \( -name include -o -name arch \) -prune -o \
1227 -name '*.[chS]' -print; \
1228 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1229 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1230 -name '*.[chS]' -print; \
1232 find $(__srctree)include $(RCS_FIND_IGNORE) \
1233 \( -name config -o -name 'arch-*' \) -prune \
1234 -o -name '*.[chS]' -print; \
1235 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1236 find $(__srctree)include/arch-$${ARCH} $(RCS_FIND_IGNORE) \
1237 -name '*.[chS]' -print; \
1239 find $(__srctree)include/arch-generic $(RCS_FIND_IGNORE) \
1240 -name '*.[chS]' -print )
1243 quiet_cmd_cscope-file = FILELST cscope.files
1244 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1246 quiet_cmd_cscope = MAKE cscope.out
1247 cmd_cscope = cscope -b
1250 $(call cmd,cscope-file)
1253 quiet_cmd_TAGS = MAKE $@
1256 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1257 echo "-I __initdata,__exitdata,__acquires,__releases \
1258 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1259 --extra=+f --c-kinds=+px"`; \
1260 $(all-sources) | xargs etags $$ETAGSF -a
1267 quiet_cmd_tags = MAKE $@
1270 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1271 echo "-I __initdata,__exitdata,__acquires,__releases \
1272 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1273 --extra=+f --c-kinds=+px"`; \
1274 $(all-sources) | xargs ctags $$CTAGSF -a
1281 # Scripts to check various things for consistency
1282 # ---------------------------------------------------------------------------
1285 find * $(RCS_FIND_IGNORE) \
1286 -name '*.[hcS]' -type f -print | sort \
1287 | xargs $(PERL) -w scripts/checkincludes.pl
1290 find * $(RCS_FIND_IGNORE) \
1291 -name '*.[hcS]' -type f -print | sort \
1292 | xargs $(PERL) -w scripts/checkversion.pl
1295 $(PERL) $(srctree)/scripts/namespace.pl
1297 endif #ifeq ($(config-targets),1)
1298 endif #ifeq ($(mixed-targets),1)
1302 $(OBJDUMP) -d vmlwk $$(find . -name '*.ko') | \
1303 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1306 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1307 $(error kernelrelease not valid - run 'make *config' to update it))
1309 @echo $(KERNELVERSION)
1312 # ---------------------------------------------------------------------------
1313 # Single targets are compatible with:
1314 # - build whith mixed source and output
1315 # - build with separate output dir 'make O=...'
1316 # - external modules
1318 # target-dir => where to store outputfile
1319 # build-dir => directory in kernel source tree to use
1321 ifeq ($(KBUILD_EXTMOD),)
1322 build-dir = $(patsubst %/,%,$(dir $@))
1323 target-dir = $(dir $@)
1325 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1326 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1327 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1330 %.s: %.c prepare scripts FORCE
1331 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1332 %.i: %.c prepare scripts FORCE
1333 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1334 %.o: %.c prepare scripts FORCE
1335 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1336 %.lst: %.c prepare scripts FORCE
1337 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1338 %.s: %.S prepare scripts FORCE
1339 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1340 %.o: %.S prepare scripts FORCE
1341 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1344 / %/: prepare scripts FORCE
1345 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1346 $(build)=$(build-dir)
1347 %.ko: prepare scripts FORCE
1348 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1349 $(build)=$(build-dir) $(@:.ko=.o)
1350 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1352 # FIXME Should go into a make.lib or something
1353 # ===========================================================================
1355 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1356 cmd_rmdirs = rm -rf $(rm-dirs)
1358 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1359 cmd_rmfiles = rm -f $(rm-files)
1362 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1363 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1364 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1366 quiet_cmd_as_o_S = AS $@
1367 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1369 # read all saved command lines
1371 targets := $(wildcard $(sort $(targets)))
1372 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1374 ifneq ($(cmd_files),)
1375 $(cmd_files): ; # Do not try to update included dependency files
1376 include $(cmd_files)
1379 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1381 # $(Q)$(MAKE) $(clean)=dir
1382 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1384 endif # skip-makefile
1386 # Build LWK user-space libraries and example programs
1388 cd user/; $(MAKE) all
1390 # A simple user-space app for the LWK to launch at boot
1391 init_task: user FORCE
1392 cp user/hello_world/hello_world ./init_task
1398 # Declare the contents of the .PHONY variable as phony. We keep that
1399 # information in a variable se we can use it in if_changed and friends.