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 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
305 -include include/lwk/autoconf.h
307 CPPFLAGS := -D__KERNEL__ $(LWKINCLUDE)
309 CFLAGS := -std=gnu99 \
310 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
311 -fno-strict-aliasing -fno-common
313 ifeq ($(call cc-option-yn, -fstack-protector),y)
314 CFLAGS += -fno-stack-protector
317 ifeq ($(call cc-option-yn, -fgnu89-inline),y)
318 CFLAGS += -fgnu89-inline
321 AFLAGS := -D__ASSEMBLY__
323 # Read KERNELRELEASE from .kernelrelease (if it exists)
324 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
325 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
327 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
328 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
329 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
330 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
332 export CPPFLAGS NOSTDINC_FLAGS LWKINCLUDE OBJCOPYFLAGS LDFLAGS
333 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
334 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
336 # When compiling out-of-tree modules, put MODVERDIR in the module
337 # tree rather than in the kernel tree. The kernel tree might
339 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
341 # Files to ignore in find ... statements
343 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
344 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
346 # ===========================================================================
347 # Rules shared between *config targets and build targets
349 # Basic helpers built in scripts/
350 PHONY += scripts_basic
352 $(Q)$(MAKE) $(build)=scripts/basic
354 # To avoid any implicit rule to kick in, define an empty command.
355 scripts/basic/%: scripts_basic ;
357 PHONY += outputmakefile
358 # outputmakefile generates a Makefile in the output directory, if using a
359 # separate output directory. This allows convenient use of make in the
362 ifneq ($(KBUILD_SRC),)
363 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
364 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
367 # To make sure we do not include .config for any of the *config targets
368 # catch them early, and hand them over to scripts/kconfig/Makefile
369 # It is allowed to specify more targets when calling make, including
370 # mixing *config targets and build targets.
371 # For example 'make oldconfig all'.
372 # Detect when mixed targets is specified, and make a second invocation
373 # of make so .config is not included in this case either (for *config).
375 no-dot-config-targets := clean mrproper distclean \
376 cscope TAGS tags help %docs check%
382 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
383 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
388 ifeq ($(KBUILD_EXTMOD),)
389 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
391 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
397 ifeq ($(mixed-targets),1)
398 # ===========================================================================
399 # We're called with mixed targets (*config and build targets).
400 # Handle them one by one.
403 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
406 ifeq ($(config-targets),1)
407 # ===========================================================================
408 # *config targets only - make sure prerequisites are updated, and descend
409 # in scripts/kconfig to make the *config target
411 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
412 # KBUILD_DEFCONFIG may point out an alternative default configuration
413 # used for 'make defconfig'
414 include $(srctree)/arch/$(ARCH)/Makefile
415 export KBUILD_DEFCONFIG
417 config %config: scripts_basic outputmakefile FORCE
418 $(Q)mkdir -p include/lwk
419 $(Q)$(MAKE) $(build)=scripts/kconfig $@
420 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
423 # ===========================================================================
424 # Build targets only - this includes vmlwk, arch specific targets, clean
425 # targets and others. In general all targets except *config targets.
427 ifeq ($(KBUILD_EXTMOD),)
428 # Additional helpers built in scripts/
429 # Carefully list dependencies so we do not try to build scripts twice
432 scripts: scripts_basic include/config/MARKER
433 $(Q)$(MAKE) $(build)=$(@)
435 scripts_basic: include/lwk/autoconf.h
437 # Objects we will link into vmlwk / subdirs we need to visit
439 drivers-y := drivers/
443 endif # KBUILD_EXTMOD
445 ifeq ($(dot-config),1)
446 # In this section, we need .config
448 # Read in dependencies to all Kconfig* files, make sure to run
449 # oldconfig if changes are detected.
454 # If .config needs to be updated, it will be done via the dependency
455 # that autoconf has on .config.
456 # To avoid any implicit rule to kick in, define an empty command
457 .config .kconfig.d: ;
459 # If .config is newer than include/lwk/autoconf.h, someone tinkered
460 # with it and forgot to run make oldconfig.
461 # If kconfig.d is missing then we are probarly in a cleaned tree so
462 # we execute the config step to be sure to catch updated Kconfig files
463 include/lwk/autoconf.h: .kconfig.d .config
464 $(Q)mkdir -p include/lwk
465 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
467 # Dummy target needed, because used as prerequisite
468 include/lwk/autoconf.h: ;
471 DEFAULT_EXTRA_TARGETS=vmlwk.bin vmlwk.asm init_task
473 # The all: target is the default when no target is given on the
475 # This allow a user to issue only 'make' to build a kernel including modules
476 # Defaults vmlwk but it is usually overriden in the arch makefile
477 all: vmlwk $(DEFAULT_EXTRA_TARGETS)
479 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
485 ifdef CONFIG_FRAME_POINTER
486 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
488 CFLAGS += -fomit-frame-pointer
491 ifdef CONFIG_UNWIND_INFO
492 CFLAGS += -fasynchronous-unwind-tables
495 ifdef CONFIG_DEBUG_INFO
500 CFLAGS += -I../palacios/include
504 include $(srctree)/arch/$(ARCH)/Makefile
506 # arch Makefile may override CC so keep this after arch Makefile is included
507 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
508 CHECKFLAGS += $(NOSTDINC_FLAGS)
510 # disable pointer signedness warnings in gcc 4.0
511 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
513 # Default kernel image to build when no specific target is given.
514 # KBUILD_IMAGE may be overruled on the commandline or
515 # set in the environment
516 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
518 export KBUILD_IMAGE ?= vmlwk
521 # INSTALL_PATH specifies where to place the updated kernel and system map
522 # images. Default is /boot, but you can set it to other values
523 export INSTALL_PATH ?= /boot
526 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
527 # relocations required by build roots. This is not defined in the
528 # makefile but the arguement can be passed to make if needed.
531 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
535 ifeq ($(KBUILD_EXTMOD),)
536 #core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
537 core-y += kernel/ mm/
539 vmlwk-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
540 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
541 $(net-y) $(net-m) $(libs-y) $(libs-m)))
543 vmlwk-alldirs := $(sort $(vmlwk-dirs) $(patsubst %/,%,$(filter %/, \
545 $(core-n) $(core-) $(drivers-n) $(drivers-) \
546 $(net-n) $(net-) $(libs-n) $(libs-))))
548 init-y := $(patsubst %/, %/built-in.o, $(init-y))
549 core-y := $(patsubst %/, %/built-in.o, $(core-y))
550 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
551 net-y := $(patsubst %/, %/built-in.o, $(net-y))
552 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
553 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
554 libs-y := $(libs-y1) $(libs-y2)
556 libs-$(CONFIG_V3VEE) += palacios/libv3vee.a
557 libs-$(CONFIG_V3VEE) += palacios/libxed32e.a
560 # ---------------------------------------------------------------------------
561 # vmlwk is build from the objects selected by $(vmlwk-init) and
562 # $(vmlwk-main). Most are built-in.o files from top-level directories
563 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
564 # Ordering when linking is important, and $(vmlwk-init) must be first.
570 # | +--< init/version.o + more
573 # | +--< driver/built-in.o mm/built-in.o + more
575 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
577 # vmlwk version (uname -v) cannot be updated during normal
578 # descending-into-subdirs phase since we do not yet know if we need to
580 # Therefore this step is delayed until just before final link of vmlwk -
581 # except in the kallsyms case where it is done just before adding the
582 # symbols to the kernel.
584 # System.map is generated to document addresses of all kernel symbols
586 vmlwk-init := $(head-y) $(init-y)
587 vmlwk-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
588 vmlwk-all := $(vmlwk-init) $(vmlwk-main)
589 vmlwk-lds := arch/$(ARCH)/kernel/vmlwk.lds
591 # Rule to link vmlwk - also used during CONFIG_KALLSYMS
592 # May be overridden by arch/$(ARCH)/Makefile
593 quiet_cmd_vmlwk__ ?= LD $@
594 cmd_vmlwk__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlwk) -o $@ \
595 -T $(vmlwk-lds) $(vmlwk-init) \
596 --start-group $(vmlwk-main) --end-group \
597 $(filter-out $(vmlwk-lds) $(vmlwk-init) $(vmlwk-main) FORCE ,$^)
599 # Generate new vmlwk version
600 quiet_cmd_vmlwk_version = GEN .version
601 cmd_vmlwk_version = set -e; \
602 if [ ! -r .version ]; then \
606 mv .version .old_version; \
607 expr 0$$(cat .old_version) + 1 >.version; \
609 $(MAKE) $(build)=init
611 # Generate System.map
612 quiet_cmd_sysmap = SYSMAP
613 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
616 # If CONFIG_KALLSYMS is set .version is already updated
617 # Generate System.map and verify that the content is consistent
618 # Use + in front of the vmlwk_version rule to silent warning with make -j2
619 # First command is ':' to allow us to use + in front of the rule
622 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlwk_version))
625 $(Q)echo 'cmd_$@ := $(cmd_vmlwk__)' > $(@D)/.$(@F).cmd
627 $(Q)$(if $($(quiet)cmd_sysmap), \
628 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
629 $(cmd_sysmap) $@ System.map; \
630 if [ $$? -ne 0 ]; then \
638 ifdef CONFIG_KALLSYMS
639 # Generate section listing all symbols and add it into vmlwk $(kallsyms.o)
640 # It's a three stage process:
641 # o .tmp_vmlwk1 has all symbols and sections, but __kallsyms is
643 # Running kallsyms on that gives us .tmp_kallsyms1.o with
644 # the right size - vmlwk version (uname -v) is updated during this step
645 # o .tmp_vmlwk2 now has a __kallsyms section of the right size,
646 # but due to the added section, some addresses have shifted.
647 # From here, we generate a correct .tmp_kallsyms2.o
648 # o The correct .tmp_kallsyms2.o is linked into the final vmlwk.
649 # o Verify that the System.map from vmlwk matches the map from
650 # .tmp_vmlwk2, just in case we did not generate kallsyms correctly.
651 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
652 # .tmp_vmlwk3 and .tmp_kallsyms3.o. This is only meant as a
653 # temporary bypass to allow the kernel to be built while the
654 # maintainers work out what went wrong with kallsyms.
656 ifdef CONFIG_KALLSYMS_EXTRA_PASS
662 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
664 define verify_kallsyms
665 $(Q)$(if $($(quiet)cmd_sysmap), \
666 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
667 $(cmd_sysmap) .tmp_vmlwk$(last_kallsyms) .tmp_System.map
668 $(Q)cmp -s System.map .tmp_System.map || \
669 (echo Inconsistent kallsyms data; \
670 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
671 rm .tmp_kallsyms* ; /bin/false )
674 # Update vmlwk version before link
675 # Use + in front of this rule to silent warning about make -j1
676 # First command is ':' to allow us to use + in front of this rule
677 cmd_ksym_ld = $(cmd_vmlwk__)
680 +$(call cmd,vmlwk_version)
682 $(Q)echo 'cmd_$@ := $(cmd_vmlwk__)' > $(@D)/.$(@F).cmd
685 # Generate .S file with all kernel symbols
686 quiet_cmd_kallsyms = KSYM $@
687 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
688 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
690 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
691 $(call if_changed_dep,as_o_S)
693 .tmp_kallsyms%.S: .tmp_vmlwk% $(KALLSYMS)
696 # .tmp_vmlwk1 must be complete except kallsyms, so update vmlwk version
697 .tmp_vmlwk1: $(vmlwk-lds) $(vmlwk-all) FORCE
698 $(call if_changed_rule,ksym_ld)
700 .tmp_vmlwk2: $(vmlwk-lds) $(vmlwk-all) .tmp_kallsyms1.o FORCE
701 $(call if_changed,vmlwk__)
703 .tmp_vmlwk3: $(vmlwk-lds) $(vmlwk-all) .tmp_kallsyms2.o FORCE
704 $(call if_changed,vmlwk__)
706 # Needs to visit scripts/ before $(KALLSYMS) can be used.
707 $(KALLSYMS): scripts ;
709 # Generate some data for debugging strange kallsyms problems
710 debug_kallsyms: .tmp_map$(last_kallsyms)
712 .tmp_map%: .tmp_vmlwk% FORCE
713 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
719 endif # ifdef CONFIG_KALLSYMS
721 # vmlwk image - including updated kernel symbols
722 vmlwk: $(vmlwk-lds) $(vmlwk-init) $(vmlwk-main) $(kallsyms.o) FORCE
723 $(call if_changed_rule,vmlwk__)
724 $(Q)rm -f .old_version
726 vmlwk.bin: vmlwk FORCE
727 $(OBJCOPY) -O binary $< $@
730 $(OBJDUMP) --disassemble $< > $@
732 # The actual objects are generated when descending,
733 # make sure no implicit rule kicks in
734 $(sort $(vmlwk-init) $(vmlwk-main)) $(vmlwk-lds): $(vmlwk-dirs) ;
736 # Handle descending into subdirectories listed in $(vmlwk-dirs)
737 # Preset locale variables to speed up the build process. Limit locale
738 # tweaks to this spot to avoid wrong language settings when running
739 # make menuconfig etc.
740 # Error messages still appears in the original language
742 PHONY += $(vmlwk-dirs)
743 $(vmlwk-dirs): prepare scripts
744 $(Q)$(MAKE) $(build)=$@
746 # Build the kernel release string
747 # The KERNELRELEASE is stored in a file named .kernelrelease
748 # to be used when executing for example make install or make modules_install
750 # Take the contents of any files called localversion* and the config
751 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
752 # LOCALVERSION from the command line override all of this
755 space := $(nullstring) # end of line
757 ___localver = $(objtree)/localversion* $(srctree)/localversion*
758 __localver = $(sort $(wildcard $(___localver)))
759 # skip backup files (containing '~')
760 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
762 localver = $(subst $(space),, \
763 $(shell cat /dev/null $(_localver)) \
764 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
766 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
767 # and if the SCM is know a tag from the SCM is appended.
768 # The appended tag is determinded by the SCM used.
770 # Currently, only git is supported.
771 # Other SCMs can edit scripts/setlocalversion and add the appropriate
773 ifdef CONFIG_LOCALVERSION_AUTO
774 _localver-auto = $(shell $(CONFIG_SHELL) \
775 $(srctree)/scripts/setlocalversion $(srctree))
776 localver-auto = $(LOCALVERSION)$(_localver-auto)
779 localver-full = $(localver)$(localver-auto)
781 # Store (new) KERNELRELASE string in .kernelrelease
782 kernelrelease = $(KERNELVERSION)$(localver-full)
783 .kernelrelease: FORCE
785 $(Q)echo $(kernelrelease) > $@
788 # Things we need to do before we recursively start building the kernel
789 # or the modules are listed in "prepare".
790 # A multi level approach is used. prepareN is processed before prepareN-1.
791 # archprepare is used in arch Makefiles and when processed arch symlink,
792 # version.h and scripts_basic is processed / created.
794 # Listed in dependency order
795 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
797 # prepare-all is deprecated, use prepare as valid replacement
800 # prepare3 is used to check if we are building in a separate output directory,
802 # 1) Check that make has not been executed in the kernel src $(srctree)
803 # 2) Create the include2 directory, used for the second arch symlink
804 prepare3: .kernelrelease
805 ifneq ($(KBUILD_SRC),)
806 @echo ' Using $(srctree) as source for kernel'
807 $(Q)if [ -f $(srctree)/.config ]; then \
808 echo " $(srctree) is not clean, please run 'make mrproper'";\
809 echo " in the '$(srctree)' directory.";\
812 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
813 $(Q)ln -fsn $(srctree)/include/arch-$(ARCH) include2/arch
816 # prepare2 creates a makefile if using a separate output directory
817 prepare2: prepare3 outputmakefile
819 prepare1: prepare2 include/lwk/version.h include/arch \
820 include/config/MARKER
821 ifneq ($(KBUILD_MODULES),)
822 $(Q)mkdir -p $(MODVERDIR)
823 $(Q)rm -f $(MODVERDIR)/*
826 archprepare: prepare1 scripts_basic
828 prepare0: archprepare FORCE
829 $(Q)$(MAKE) $(build)=.
831 # All the preparing..
832 prepare prepare-all: prepare0
834 # Leave this as default for preprocessing vmlwk.lds.S, which is now
835 # done in arch/$(ARCH)/kernel/Makefile
837 export CPPFLAGS_vmlwk.lds += -P -C -U$(ARCH)
839 # FIXME: The arch symlink changes when $(ARCH) changes. That's
840 # hard to detect, but I suppose "make mrproper" is a good idea
841 # before switching between archs anyway.
844 @echo ' SYMLINK $@ -> include/arch-$(ARCH)'
845 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
846 @ln -fsn arch-$(ARCH) $@
848 # Split autoconf.h into include/lwk/config/*
850 include/config/MARKER: scripts/basic/split-include include/lwk/autoconf.h
851 @echo ' SPLIT include/lwk/autoconf.h -> include/config/*'
852 @scripts/basic/split-include include/lwk/autoconf.h include/config
855 # Generate some files
856 # ---------------------------------------------------------------------------
858 # KERNELRELEASE can change from a few different places, meaning version.h
859 # needs to be updated, so this check is forced on all builds
863 define filechk_version.h
864 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
865 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
868 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
869 echo \#define LWK_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
870 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
874 include/lwk/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
875 $(call filechk,version.h)
877 # ---------------------------------------------------------------------------
881 @echo '*** Warning: make $@ is unnecessary now.'
883 # ---------------------------------------------------------------------------
885 INSTALL_HDR_PATH=$(MODLIB)/abi
886 export INSTALL_HDR_PATH
888 PHONY += headers_install
889 headers_install: include/lwk/version.h
890 $(Q)unifdef -Ux /dev/null
891 $(Q)rm -rf $(INSTALL_HDR_PATH)/include
892 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include
894 PHONY += headers_check
895 headers_check: headers_install
896 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
898 # ---------------------------------------------------------------------------
903 # By default, build modules as well
910 modules: $(vmlwk-dirs) $(if $(KBUILD_BUILTIN),vmlwk)
911 @echo ' Building modules, stage 2.';
912 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
915 # Target to prepare building external modules
916 PHONY += modules_prepare
917 modules_prepare: prepare scripts
919 # Target to install modules
920 PHONY += modules_install
921 modules_install: _modinst_ _modinst_post
925 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
926 echo "Warning: you may need to install module-init-tools"; \
927 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
930 @rm -rf $(MODLIB)/kernel
931 @rm -f $(MODLIB)/source
932 @mkdir -p $(MODLIB)/kernel
933 @ln -s $(srctree) $(MODLIB)/source
934 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
935 rm -f $(MODLIB)/build ; \
936 ln -s $(objtree) $(MODLIB)/build ; \
938 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
940 # If System.map exists, run depmod. This deliberately does not have a
941 # dependency on System.map since that would run the dependency tree on
942 # vmlwk. This depmod is only for convenience to give the initial
943 # boot a modules.dep even before / is mounted read-write. However the
944 # boot script depmod is the master version.
945 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
948 depmod_opts := -b $(INSTALL_MOD_PATH) -r
950 PHONY += _modinst_post
951 _modinst_post: _modinst_
952 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
954 else # CONFIG_MODULES
956 # Modules not configured
957 # ---------------------------------------------------------------------------
959 modules modules_install: FORCE
961 @echo "The present kernel configuration has modules disabled."
962 @echo "Type 'make config' and enable loadable module support."
963 @echo "Then build a kernel with module support enabled."
967 endif # CONFIG_MODULES
970 # Cleaning is done on three levels.
971 # make clean Delete most generated files
972 # Leave enough to build external modules
973 # make mrproper Delete the current configuration, and all generated files
974 # make distclean Remove editor backup files, patch leftover files and the like
976 # Directories & files removed with 'make clean'
977 CLEAN_DIRS += $(MODVERDIR)
978 CLEAN_FILES += vmlwk System.map vmlwk.bin vmlwk.asm \
979 .tmp_kallsyms* .tmp_version .tmp_vmlwk* .tmp_System.map
981 # Directories & files removed with 'make mrproper'
982 MRPROPER_DIRS += include/config include2
983 MRPROPER_FILES += .config .config.old include/arch .version .old_version \
984 include/lwk/autoconf.h include/lwk/version.h \
985 .kernelrelease Module.symvers tags TAGS cscope*
987 # clean - Delete most, but leave enough to build external modules
989 clean: rm-dirs := $(CLEAN_DIRS)
990 clean: rm-files := $(CLEAN_FILES)
991 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlwk-alldirs))
993 PHONY += $(clean-dirs) clean archclean
995 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
997 clean: archclean $(clean-dirs)
1000 @find . $(RCS_FIND_IGNORE) \
1001 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1002 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1003 -type f -print | xargs rm -f
1006 # mrproper - Delete all generated files, including .config
1008 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1009 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1010 #mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1011 mrproper-dirs := $(addprefix _mrproper_, scripts)
1013 PHONY += $(mrproper-dirs) mrproper archmrproper
1015 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1017 mrproper: clean archmrproper $(mrproper-dirs)
1026 @find $(srctree) $(RCS_FIND_IGNORE) \
1027 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1028 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1029 -o -name '.*.rej' -o -size 0 \
1030 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1031 -type f -print | xargs rm -f
1034 # Packaging of the kernel to various formats
1035 # ---------------------------------------------------------------------------
1036 # rpm target kept for backward compatibility
1037 package-dir := $(srctree)/scripts/package
1040 $(Q)$(MAKE) $(build)=$(package-dir) $@
1042 $(Q)$(MAKE) $(build)=$(package-dir) $@
1045 # Brief documentation of the typical targets used
1046 # ---------------------------------------------------------------------------
1048 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1049 boards := $(notdir $(boards))
1052 @echo 'Cleaning targets:'
1053 @echo ' clean - remove most generated files but keep the config'
1054 @echo ' mrproper - remove all generated files + config + various backup files'
1056 @echo 'Configuration targets:'
1057 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1059 @echo 'Other generic targets:'
1060 @echo ' all - Build all targets marked with [*]'
1061 @echo '* vmllwk - Build the bare kernel'
1062 @echo '* modules - Build all modules'
1063 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1064 @echo ' dir/ - Build all files in dir and below'
1065 @echo ' dir/file.[ois] - Build specified target only'
1066 @echo ' dir/file.ko - Build module including final link'
1067 @echo ' rpm - Build a kernel as an RPM package'
1068 @echo ' tags/TAGS - Generate tags file for editors'
1069 @echo ' cscope - Generate cscope index'
1070 @echo ' kernelrelease - Output the release version string'
1071 @echo ' kernelversion - Output the version stored in Makefile'
1072 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
1073 @echo ' (default: /lib/modules/$$VERSION/abi)'
1075 @echo 'Static analysers'
1076 @echo ' checkstack - Generate a list of stack hogs'
1077 @echo ' namespacecheck - Name space analysis on compiled kernel'
1079 @echo 'Kernel packaging:'
1080 @$(MAKE) $(build)=$(package-dir) help
1082 @echo 'Documentation targets:'
1083 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1085 @echo 'Architecture specific targets ($(ARCH)):'
1086 @$(if $(archhelp),$(archhelp),\
1087 echo ' No architecture specific help defined for $(ARCH)')
1090 $(foreach b, $(boards), \
1091 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1094 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1095 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1096 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1097 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1099 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1100 @echo 'For further info see the ./README file'
1103 # Documentation targets
1104 # ---------------------------------------------------------------------------
1105 %docs: scripts_basic FORCE
1106 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1108 else # KBUILD_EXTMOD
1111 # External module support.
1112 # When building external modules the kernel used as basis is considered
1113 # read-only, and no consistency checks are made and the make
1114 # system is not used on the basis kernel. If updates are required
1115 # in the basis kernel ordinary make commands (without M=...) must
1118 # The following are the only valid targets when building external
1120 # make M=dir clean Delete all automatically generated files
1121 # make M=dir modules Make all modules in specified dir
1122 # make M=dir Same as 'make M=dir modules'
1123 # make M=dir modules_install
1124 # Install the modules build in the module directory
1125 # Assumes install directory is already created
1127 # We are always building modules
1129 PHONY += crmodverdir
1131 $(Q)mkdir -p $(MODVERDIR)
1132 $(Q)rm -f $(MODVERDIR)/*
1134 PHONY += $(objtree)/Module.symvers
1135 $(objtree)/Module.symvers:
1136 @test -e $(objtree)/Module.symvers || ( \
1138 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1139 echo " is missing; modules will have no dependencies and modversions."; \
1142 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1143 PHONY += $(module-dirs) modules
1144 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1145 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1147 modules: $(module-dirs)
1148 @echo ' Building modules, stage 2.';
1149 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1151 PHONY += modules_install
1152 modules_install: _emodinst_ _emodinst_post
1154 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1157 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1158 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1160 # Run depmod only is we have System.map and depmod is executable
1161 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1162 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1163 $(DEPMOD) -ae -F System.map \
1164 $(if $(strip $(INSTALL_MOD_PATH)), \
1165 -b $(INSTALL_MOD_PATH) -r) \
1169 PHONY += _emodinst_post
1170 _emodinst_post: _emodinst_
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'
1197 PHONY += prepare scripts
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)include $(RCS_FIND_IGNORE) \
1237 \( -name config -o -name 'arch-*' \) -prune \
1238 -o -name '*.[chS]' -print; \
1239 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1240 find $(__srctree)include/arch-$${ARCH} $(RCS_FIND_IGNORE) \
1241 -name '*.[chS]' -print; \
1243 find $(__srctree)include/arch-generic $(RCS_FIND_IGNORE) \
1244 -name '*.[chS]' -print )
1247 quiet_cmd_cscope-file = FILELST cscope.files
1248 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1250 quiet_cmd_cscope = MAKE cscope.out
1251 cmd_cscope = cscope -b
1254 $(call cmd,cscope-file)
1257 quiet_cmd_TAGS = MAKE $@
1260 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1261 echo "-I __initdata,__exitdata,__acquires,__releases \
1262 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1263 --extra=+f --c-kinds=+px"`; \
1264 $(all-sources) | xargs etags $$ETAGSF -a
1271 quiet_cmd_tags = MAKE $@
1274 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1275 echo "-I __initdata,__exitdata,__acquires,__releases \
1276 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1277 --extra=+f --c-kinds=+px"`; \
1278 $(all-sources) | xargs ctags $$CTAGSF -a
1285 # Scripts to check various things for consistency
1286 # ---------------------------------------------------------------------------
1289 find * $(RCS_FIND_IGNORE) \
1290 -name '*.[hcS]' -type f -print | sort \
1291 | xargs $(PERL) -w scripts/checkincludes.pl
1294 find * $(RCS_FIND_IGNORE) \
1295 -name '*.[hcS]' -type f -print | sort \
1296 | xargs $(PERL) -w scripts/checkversion.pl
1299 $(PERL) $(srctree)/scripts/namespace.pl
1301 endif #ifeq ($(config-targets),1)
1302 endif #ifeq ($(mixed-targets),1)
1306 $(OBJDUMP) -d vmlwk $$(find . -name '*.ko') | \
1307 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1310 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1311 $(error kernelrelease not valid - run 'make *config' to update it))
1313 @echo $(KERNELVERSION)
1316 # ---------------------------------------------------------------------------
1317 # Single targets are compatible with:
1318 # - build whith mixed source and output
1319 # - build with separate output dir 'make O=...'
1320 # - external modules
1322 # target-dir => where to store outputfile
1323 # build-dir => directory in kernel source tree to use
1325 ifeq ($(KBUILD_EXTMOD),)
1326 build-dir = $(patsubst %/,%,$(dir $@))
1327 target-dir = $(dir $@)
1329 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1330 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1331 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1334 %.s: %.c prepare scripts FORCE
1335 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1336 %.i: %.c prepare scripts FORCE
1337 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1338 %.o: %.c prepare scripts FORCE
1339 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1340 %.lst: %.c prepare scripts FORCE
1341 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1342 %.s: %.S prepare scripts FORCE
1343 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1344 %.o: %.S prepare scripts FORCE
1345 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1348 / %/: prepare scripts FORCE
1349 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1350 $(build)=$(build-dir)
1351 %.ko: prepare scripts FORCE
1352 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1353 $(build)=$(build-dir) $(@:.ko=.o)
1354 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1356 # FIXME Should go into a make.lib or something
1357 # ===========================================================================
1359 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1360 cmd_rmdirs = rm -rf $(rm-dirs)
1362 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1363 cmd_rmfiles = rm -f $(rm-files)
1366 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1367 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1368 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1370 quiet_cmd_as_o_S = AS $@
1371 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1373 # read all saved command lines
1375 targets := $(wildcard $(sort $(targets)))
1376 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1378 ifneq ($(cmd_files),)
1379 $(cmd_files): ; # Do not try to update included dependency files
1380 include $(cmd_files)
1383 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1385 # $(Q)$(MAKE) $(clean)=dir
1386 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1388 endif # skip-makefile
1390 # Build LWK user-space libraries and example programs
1392 cd user/; $(MAKE) all
1394 # A simple user-space app for the LWK to launch at boot
1395 init_task: user FORCE
1396 cp user/hello_world/hello_world ./init_task
1402 # Declare the contents of the .PHONY variable as phony. We keep that
1403 # information in a variable se we can use it in if_changed and friends.