8 # To see a list of typical targets execute "make help"
9 # More info can be located in ./README
10 # Comments in this file are targeted only to the developer, do not
11 # expect to learn how to build the kernel reading this file.
13 # Do not print "Entering directory ..."
14 MAKEFLAGS += --no-print-directory
16 # We are using a recursive build, so we need to do a little thinking
17 # to get the ordering right.
19 # Most importantly: sub-Makefiles should only ever modify files in
20 # their own directory. If in some directory we have a dependency on
21 # a file in another dir (which doesn't happen often, but it's of
22 # unavoidable when linking the built-in.o targets which finally
23 # turn into vmlinux), we will call a sub make in that other dir, and
24 # after that we are sure that everything which is in that other dir
27 # The only cases where we need to modify files which have global
28 # effects are thus separated out and done before the recursive
29 # descending is started. They are now explicitly listed as the
32 # To put more focus on warnings, be less verbose as default
33 # Use 'make V=1' to see the full commands
36 ifeq ("$(origin V)", "command line")
44 # Call sparse as part of compilation of C files
45 # Use 'make C=1' to enable sparse checking
48 ifeq ("$(origin C)", "command line")
49 KBUILD_CHECKSRC = $(C)
52 ifndef KBUILD_CHECKSRC
56 # Use make M=dir to specify directory of external module to build
57 # Old syntax make ... SUBDIRS=$PWD is still supported
58 # Setting the environment variable KBUILD_EXTMOD take precedence
60 KBUILD_EXTMOD ?= $(SUBDIRS)
63 ifeq ("$(origin M)", "command line")
69 # kbuild supports saving output files in a separate directory.
70 # To locate output files in a separate directory two syntax'es are supported.
71 # In both cases the working directory must be the root of the kernel src.
73 # Use "make O=dir/to/store/output/files/"
75 # 2) Set KBUILD_OUTPUT
76 # Set the environment variable KBUILD_OUTPUT to point to the directory
77 # where the output files shall be placed.
78 # export KBUILD_OUTPUT=dir/to/store/output/files/
81 # The O= assigment takes precedence over the KBUILD_OUTPUT environment variable.
84 # KBUILD_SRC is set on invocation of make in OBJ directory
85 # KBUILD_SRC is not intended to be used by the regular user (for now)
88 # OK, Make called in directory where kernel src resides
89 # Do we want to locate output files in a separate directory?
91 ifeq ("$(origin O)", "command line")
96 # That's our default target when none is given on the command line
100 ifneq ($(KBUILD_OUTPUT),)
101 # Invoke a second make in the output directory, passing relevant variables
102 # check that the output directory actually exists
103 saved-output := $(KBUILD_OUTPUT)
104 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
105 $(if $(wildcard $(KBUILD_OUTPUT)),, \
106 $(error output directory "$(saved-output)" does not exist))
108 .PHONY: $(MAKECMDGOALS)
110 $(filter-out _all,$(MAKECMDGOALS)) _all:
111 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
112 KBUILD_SRC=$(CURDIR) KBUILD_VERBOSE=$(KBUILD_VERBOSE) \
113 KBUILD_CHECK=$(KBUILD_CHECK) KBUILD_EXTMOD="$(KBUILD_EXTMOD)" \
114 -f $(CURDIR)/Makefile $@
116 # Leave processing to above invocation of make
118 endif # ifneq ($(KBUILD_OUTPUT),)
119 endif # ifeq ($(KBUILD_SRC),)
121 # We process the rest of the Makefile if this is the final invocation of make
122 ifeq ($(skip-makefile),)
124 # If building an external module we do not care about the all: rule
125 # but instead _all depend on modules
127 ifeq ($(KBUILD_EXTMOD),)
133 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
135 # FIXME - TOPDIR is obsolete, use srctree/objtree
142 export srctree objtree VPATH TOPDIR
144 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
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.
154 # Cross compiling and selecting different set of gcc/bin-utils
155 # ---------------------------------------------------------------------------
157 # When performing cross compilation for other architectures ARCH shall be set
158 # to the target architecture. (See arch/* for the possibilities).
159 # ARCH can be set during invocation of make:
161 # Another way is to have ARCH set in the environment.
162 # The default ARCH is the host where make is executed.
164 # CROSS_COMPILE specify the prefix used for all executables used
165 # during compilation. Only gcc and related bin-utils executables
166 # are prefixed with $(CROSS_COMPILE).
167 # CROSS_COMPILE can be set on the command line
168 # make CROSS_COMPILE=ia64-linux-
169 # Alternatively CROSS_COMPILE can be set in the environment.
170 # Default value for CROSS_COMPILE is not to prefix executables
171 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
176 # Architecture as present in compile.h
177 UTS_MACHINE := $(ARCH)
179 # SHELL used by kbuild
180 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
181 else if [ -x /bin/bash ]; then echo /bin/bash; \
182 else echo sh; fi ; fi)
186 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
189 # Decide whether to build built-in, modular, or both.
190 # Normally, just do built-in.
195 # If we have only "make modules", don't compile built-in objects.
196 # When we're building modules with modversions, we need to consider
197 # the built-in objects during the descend as well, in order to
198 # make sure the checksums are uptodate before we record them.
200 ifeq ($(MAKECMDGOALS),modules)
201 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
204 # If we have "make <whatever> modules", compile modules
205 # in addition to whatever we do anyway.
206 # Just "make" or "make all" shall build modules as well
208 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
212 ifeq ($(MAKECMDGOALS),)
216 export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE
217 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
220 # ---------------------------------------------------------------------------
222 # Normally, we echo the whole command before executing it. By making
223 # that echo $($(quiet)$(cmd)), we now have the possibility to set
224 # $(quiet) to choose other forms of output instead, e.g.
226 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
227 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
229 # If $(quiet) is empty, the whole command will be printed.
230 # If it is set to "quiet_", only the short version will be printed.
231 # If it is set to "silent_", nothing wil be printed at all, since
232 # the variable $(silent_cmd_cc_o_c) doesn't exist.
234 # A simple variant is to prefix commands with $(Q) - that's usefull
235 # for commands that shall be hidden in non-verbose mode.
239 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
240 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
242 ifeq ($(KBUILD_VERBOSE),1)
250 # If the user is running make -s (silent mode), suppress echoing of
253 ifneq ($(findstring s,$(MAKEFLAGS)),)
257 check_gcc = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
259 export quiet Q KBUILD_VERBOSE check_gcc
261 # Look for make include files relative to root of kernel src
262 MAKEFLAGS += --include-dir=$(srctree)
264 # For maximum performance (+ possibly random breakage, uncomment
269 # Make variables (CC, etc...)
271 AS = $(CROSS_COMPILE)as
272 LD = $(CROSS_COMPILE)ld
273 CC = $(CROSS_COMPILE)gcc
275 AR = $(CROSS_COMPILE)ar
276 NM = $(CROSS_COMPILE)nm
277 STRIP = $(CROSS_COMPILE)strip
278 OBJCOPY = $(CROSS_COMPILE)objcopy
279 OBJDUMP = $(CROSS_COMPILE)objdump
281 GENKSYMS = scripts/genksyms/genksyms
282 DEPMOD = /sbin/depmod
283 KALLSYMS = scripts/kallsyms
287 CFLAGS_MODULE = $(MODFLAGS)
288 AFLAGS_MODULE = $(MODFLAGS)
293 NOSTDINC_FLAGS = -nostdinc -iwithprefix include
295 CPPFLAGS := -D__KERNEL__ -Iinclude \
296 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include)
298 CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \
299 -fno-strict-aliasing -fno-common
300 AFLAGS := -D__ASSEMBLY__
302 export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
303 CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
304 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
305 HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB LDFLAGS_MODULE CHECK
307 export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
308 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
309 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
311 # When compiling out-of-tree modules, put MODVERDIR in the module
312 # tree rather than in the kernel tree. The kernel tree might
314 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
316 # The temporary file to save gcc -MD generated dependencies must not
319 depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
321 # Files to ignore in find ... statements
323 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o
324 RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc
326 # ===========================================================================
327 # Rules shared between *config targets and build targets
329 # Basic helpers built in scripts/
330 .PHONY: scripts_basic
332 $(Q)$(MAKE) $(build)=scripts/basic
334 # To make sure we do not include .config for any of the *config targets
335 # catch them early, and hand them over to scripts/kconfig/Makefile
336 # It is allowed to specify more targets when calling make, including
337 # mixing *config targets and build targets.
338 # For example 'make oldconfig all'.
339 # Detect when mixed targets is specified, and make a second invocation
340 # of make so .config is not included in this case either (for *config).
342 no-dot-config-targets := clean mrproper distclean \
343 cscope TAGS tags help %docs check%
349 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
350 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
355 ifeq ($(KBUILD_EXTMOD),)
356 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
358 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
364 ifeq ($(mixed-targets),1)
365 # ===========================================================================
366 # We're called with mixed targets (*config and build targets).
367 # Handle them one by one.
370 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
373 ifeq ($(config-targets),1)
374 # ===========================================================================
375 # *config targets only - make sure prerequisites are updated, and descend
376 # in scripts/kconfig to make the *config target
378 config: scripts_basic FORCE
379 $(Q)$(MAKE) $(build)=scripts/kconfig $@
380 %config: scripts_basic FORCE
381 $(Q)$(MAKE) $(build)=scripts/kconfig $@
384 # ===========================================================================
385 # Build targets only - this includes vmlinux, arch specific targets, clean
386 # targets and others. In general all targets except *config targets.
388 ifeq ($(KBUILD_EXTMOD),)
389 # Additional helpers built in scripts/
390 # Carefully list dependencies so we do not try to build scripts twice
393 scripts: scripts_basic include/config/MARKER
394 $(Q)$(MAKE) $(build)=$(@)
396 scripts_basic: include/linux/autoconf.h
398 # Objects we will link into vmlinux / subdirs we need to visit
400 drivers-y := drivers/ sound/
404 endif # KBUILD_EXTMOD
406 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
407 export HPATH := $(TOPDIR)/include
408 brcmdrivers-y := $(INC_BRCMBOARDPARMS_PATH)/$(BRCM_BOARD)/ $(BRCMDRIVERS_DIR)/ $(INC_FLASH_PATH)/
409 BRCMDRIVERS := $(brcmdrivers-y)
410 # CONFIG_MIPS_BRCM End Broadcom changed code.
412 ifeq ($(dot-config),1)
413 # In this section, we need .config
415 # Read in dependencies to all Kconfig* files, make sure to run
416 # oldconfig if changes are detected.
421 # If .config needs to be updated, it will be done via the dependency
422 # that autoconf has on .config.
423 # To avoid any implicit rule to kick in, define an empty command
426 # If .config is newer than include/linux/autoconf.h, someone tinkered
427 # with it and forgot to run make oldconfig
428 include/linux/autoconf.h: .config
429 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
431 # Dummy target needed, because used as prerequisite
432 include/linux/autoconf.h: ;
435 include $(srctree)/arch/$(ARCH)/Makefile
437 # Default kernel image to build when no specific target is given.
438 # KBUILD_IMAGE may be overruled on the commandline or
439 # set in the environment
440 # Also any assingments in arch/$(ARCH)/Makefiel take precedence over
442 export KBUILD_IMAGE ?= vmlinux
444 # The all: target is the default when no target is given on the
446 # This allow a user to issue only 'make' to build a kernel including modules
447 # Defaults vmlinux but it is usually overriden in the arch makefile
450 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
456 ifndef CONFIG_FRAME_POINTER
457 CFLAGS += -fomit-frame-pointer
460 ifdef CONFIG_DEBUG_INFO
464 # warn about C99 declaration after statement
465 CFLAGS += $(call check_gcc,-Wdeclaration-after-statement,)
468 # INSTALL_PATH specifies where to place the updated kernel and system map
469 # images. Uncomment if you want to place them anywhere other than root.
472 #export INSTALL_PATH=/boot
475 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
476 # relocations required by build roots. This is not defined in the
477 # makefile but the arguement can be passed to make if needed.
480 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
481 INSTALL_MOD_PATH := $(PROFILE_DIR)/modules
482 # CONFIG_MIPS_BRCM End Broadcom changed code.
484 MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
488 ifeq ($(KBUILD_EXTMOD),)
489 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/
491 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
492 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
493 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
494 $(brcmdrivers-y) $(brcmdrivers-m) \
495 $(net-y) $(net-m) $(libs-y) $(libs-m)))
497 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
499 $(core-n) $(core-) $(drivers-n) $(drivers-) \
500 $(brcmdrivers-n) $(brcmdrivers-) \
501 $(net-n) $(net-) $(libs-n) $(libs-))))
502 # CONFIG_MIPS_BRCM End Broadcom changed code.
504 init-y := $(patsubst %/, %/built-in.o, $(init-y))
505 core-y := $(patsubst %/, %/built-in.o, $(core-y))
506 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
507 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
508 brcmdrivers-y := $(patsubst %/, %/built-in.o, $(brcmdrivers-y))
509 # CONFIG_MIPS_BRCM End Broadcom changed code.
510 net-y := $(patsubst %/, %/built-in.o, $(net-y))
511 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
512 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
513 libs-y := $(libs-y1) $(libs-y2)
516 # ---------------------------------------------------------------------------
518 # This is a bit tricky: If we need to relink vmlinux, we want
519 # the version number incremented, which means recompile init/version.o
520 # and relink init/init.o. However, we cannot do this during the
521 # normal descending-into-subdirs phase, since at that time
522 # we cannot yet know if we will need to relink vmlinux.
523 # So we descend into init/ inside the rule for vmlinux again.
525 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
526 vmlinux-objs := $(head-y) $(init-y) $(core-y) $(libs-y) $(drivers-y) $(brcmdrivers-y) $(net-y)
528 quiet_cmd_vmlinux__ = LD $@
530 $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) $(head-y) $(init-y) \
538 $(filter .tmp_kallsyms%,$^) \
541 # CONFIG_MIPS_BRCM End Broadcom changed code.
543 # set -e makes the rule exit immediately on error
545 define rule_vmlinux__
547 $(if $(filter .tmp_kallsyms%,$^),, \
548 echo ' GEN .version'; \
549 . $(srctree)/scripts/mkversion > .tmp_version; \
550 mv -f .tmp_version .version; \
551 $(MAKE) $(build)=init; \
553 $(if $($(quiet)cmd_vmlinux__), \
554 echo ' $($(quiet)cmd_vmlinux__)' &&) \
556 echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
559 do_system_map = $(NM) $(1) | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort > $(2)
561 LDFLAGS_vmlinux += -T arch/$(ARCH)/kernel/vmlinux.lds.s
563 # Generate section listing all symbols and add it into vmlinux
564 # It's a three stage process:
565 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
567 # Running kallsyms on that gives us .tmp_kallsyms1.o with
569 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
570 # but due to the added section, some addresses have shifted
571 # From here, we generate a correct .tmp_kallsyms2.o
572 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
573 # o Verify that the System.map from vmlinux matches the map from
574 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
575 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
576 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
577 # temporary bypass to allow the kernel to be built while the
578 # maintainers work out what went wrong with kallsyms.
580 ifdef CONFIG_KALLSYMS
582 ifdef CONFIG_KALLSYMS_EXTRA_PASS
588 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
590 define rule_verify_kallsyms
591 @$(call do_system_map, .tmp_vmlinux$(last_kallsyms), .tmp_System.map)
592 @cmp -s System.map .tmp_System.map || \
593 (echo Inconsistent kallsyms data, try setting CONFIG_KALLSYMS_EXTRA_PASS ; rm .tmp_kallsyms* ; false)
596 quiet_cmd_kallsyms = KSYM $@
597 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) $(foreach x,$(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
599 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
600 $(call if_changed_dep,as_o_S)
602 .tmp_kallsyms%.S: .tmp_vmlinux%
605 .tmp_vmlinux1: $(vmlinux-objs) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
606 $(call if_changed_rule,vmlinux__)
608 .tmp_vmlinux2: $(vmlinux-objs) .tmp_kallsyms1.o arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
609 $(call if_changed_rule,vmlinux__)
611 .tmp_vmlinux3: $(vmlinux-objs) .tmp_kallsyms2.o arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
612 $(call if_changed_rule,vmlinux__)
616 # Finally the vmlinux rule
620 $(call do_system_map, $@, System.map)
621 $(rule_verify_kallsyms)
624 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
625 vmlinux: preparebrcmdriver $(vmlinux-objs) $(kallsyms.o) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
626 $(call if_changed_rule,vmlinux)
627 # CONFIG_MIPS_BRCM End Broadcom changed code.
629 # The actual objects are generated when descending,
630 # make sure no implicit rule kicks in
632 $(sort $(vmlinux-objs)) arch/$(ARCH)/kernel/vmlinux.lds.s: $(vmlinux-dirs) ;
634 # Handle descending into subdirectories listed in $(vmlinux-dirs)
635 # Preset locale variables to speed up the build process. Limit locale
636 # tweaks to this spot to avoid wrong language settings when running
637 # make menuconfig etc.
638 # Error messages still appears in the original language
640 .PHONY: $(vmlinux-dirs)
641 $(vmlinux-dirs): prepare-all scripts
642 $(Q)$(MAKE) $(build)=$@
644 # Things we need to do before we recursively start building the kernel
645 # or the modules are listed in "prepare-all".
646 # A multi level approach is used. prepare1 is updated first, then prepare0.
647 # prepare-all is the collection point for the prepare targets.
649 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
650 .PHONY: prepare-all prepare prepare0 prepare1 prepare2 preparebrcmdriver
653 $(Q)$(MAKE) -C $(BRCMDRIVERS_DIR) symlinks
654 # CONFIG_MIPS_BRCM End Broadcom changed code.
656 # prepare 2 generate Makefile to be placed in output directory, if
657 # using a seperate output directory. This allows convinient use
658 # of make in output directory
660 $(Q)if [ ! $(srctree) -ef $(objtree) ]; then \
661 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
662 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
663 > $(objtree)/Makefile; \
666 # prepare1 is used to check if we are building in a separate output directory,
668 # 1) Check that make has not been executed in the kernel src $(srctree)
669 # 2) Create the include2 directory, used for the second asm symlink
672 ifneq ($(KBUILD_SRC),)
673 @echo ' Using $(srctree) as source for kernel'
674 $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \
675 echo " $(srctree) is not clean, please run 'make mrproper'";\
676 echo " in the '$(srctree)' directory.";\
679 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
680 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
683 prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER
684 ifneq ($(KBUILD_MODULES),)
685 $(Q)rm -rf $(MODVERDIR)
686 $(Q)mkdir -p $(MODVERDIR)
689 # All the preparing..
690 prepare-all: prepare0 prepare
692 # Leave this as default for preprocessing vmlinux.lds.S, which is now
693 # done in arch/$(ARCH)/kernel/Makefile
695 export AFLAGS_vmlinux.lds.o += -P -C -U$(ARCH)
698 # ---------------------------------------------------------------------------
700 %.s: %.c scripts FORCE
701 $(Q)$(MAKE) $(build)=$(@D) $@
702 %.i: %.c scripts FORCE
703 $(Q)$(MAKE) $(build)=$(@D) $@
704 %.o: %.c scripts FORCE
705 $(Q)$(MAKE) $(build)=$(@D) $@
706 %/: scripts prepare FORCE
707 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
708 %.lst: %.c scripts FORCE
709 $(Q)$(MAKE) $(build)=$(@D) $@
710 %.s: %.S scripts FORCE
711 $(Q)$(MAKE) $(build)=$(@D) $@
712 %.o: %.S scripts FORCE
713 $(Q)$(MAKE) $(build)=$(@D) $@
715 # FIXME: The asm symlink changes when $(ARCH) changes. That's
716 # hard to detect, but I suppose "make mrproper" is a good idea
717 # before switching between archs anyway.
720 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
721 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
722 @ln -fsn asm-$(ARCH) $@
724 # Split autoconf.h into include/linux/config/*
726 include/config/MARKER: include/linux/autoconf.h
727 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
728 @scripts/basic/split-include include/linux/autoconf.h include/config
731 # Generate some files
732 # ---------------------------------------------------------------------------
734 # version.h changes when $(KERNELRELEASE) etc change, as defined in
739 define filechk_version.h
740 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
741 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
744 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
745 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
746 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
750 include/linux/version.h: Makefile
751 $(call filechk,version.h)
753 # ---------------------------------------------------------------------------
757 @echo '*** Warning: make $@ is unnecessary now.'
759 # ---------------------------------------------------------------------------
764 # By default, build modules as well
771 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
772 modules: preparebrcmdriver $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
773 # CONFIG_MIPS_BRCM End Broadcom changed code.
774 @echo ' Building modules, stage 2.';
775 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
778 # Target to prepare building external modules
779 .PHONY: modules_prepare
780 modules_prepare: prepare-all scripts
782 # Target to install modules
783 .PHONY: modules_install
784 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
785 #modules_install: _modinst_ _modinst_post
786 #We have no need for it "_modinst_post"
787 modules_install: _modinst_
788 # CONFIG_MIPS_BRCM End Broadcom changed code.
792 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
793 # @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \
794 # echo "Warning: you may need to install module-init-tools"; \
795 # echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
798 # CONFIG_MIPS_BRCM End Broadcom changed code.
799 @rm -rf $(MODLIB)/kernel
800 @rm -f $(MODLIB)/source
801 @mkdir -p $(MODLIB)/kernel
802 # CONFIG_MIPS_BRCM Begin Broadcom changed code
803 # @ln -s $(srctree) $(MODLIB)/source
804 # @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
805 # rm -f $(MODLIB)/build ; \
806 # ln -s $(objtree) $(MODLIB)/build ; \
808 # CONFIG_MIPS_BRCM End Broadcom changed code.
809 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
811 # If System.map exists, run depmod. This deliberately does not have a
812 # dependency on System.map since that would run the dependency tree on
813 # vmlinux. This depmod is only for convenience to give the initial
814 # boot a modules.dep even before / is mounted read-write. However the
815 # boot script depmod is the master version.
816 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
819 depmod_opts := -b $(INSTALL_MOD_PATH) -r
821 .PHONY: _modinst_post
822 _modinst_post: _modinst_
823 if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
825 else # CONFIG_MODULES
827 # Modules not configured
828 # ---------------------------------------------------------------------------
830 modules modules_install: FORCE
832 @echo "The present kernel configuration has modules disabled."
833 @echo "Type 'make config' and enable loadable module support."
834 @echo "Then build a kernel with module support enabled."
838 endif # CONFIG_MODULES
840 # Generate asm-offsets.h
841 # ---------------------------------------------------------------------------
843 define filechk_gen-asm-offsets
845 echo "#ifndef __ASM_OFFSETS_H__"; \
846 echo "#define __ASM_OFFSETS_H__"; \
848 echo " * DO NOT MODIFY."; \
850 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
854 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
861 # Cleaning is done on three levels.
862 # make clean Delete most generated files
863 # Leave enough to build external modules
864 # make mrproper Delete the current configuration, and all generated files
865 # make distclean Remove editor backup files, patch leftover files and the like
867 # Directories & files removed with 'make clean'
868 CLEAN_DIRS += $(MODVERDIR)
869 CLEAN_FILES += vmlinux System.map \
870 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
872 # Directories & files removed with 'make mrproper'
873 MRPROPER_DIRS += include/config include2
874 MRPROPER_FILES += .config .config.old include/asm .version \
875 include/linux/autoconf.h include/linux/version.h \
876 Module.symvers tags TAGS cscope*
878 # clean - Delete most, but leave enough to build external modules
880 clean: rm-dirs := $(CLEAN_DIRS)
881 clean: rm-files := $(CLEAN_FILES)
882 clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs))
884 .PHONY: $(clean-dirs) clean archclean
886 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
888 clean: archclean $(clean-dirs)
891 # CONFIG_MIPS_BRCM Begin Broadcom changed code.
892 @find . $(BRCMDRIVERS) $(RCS_FIND_IGNORE) \
893 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
894 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
895 -type f -print | xargs rm -f
896 # CONFIG_MIPS_BRCM End Broadcom changed code.
898 # mrproper - Delete all generated files, including .config
900 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
901 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
902 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
904 .PHONY: $(mrproper-dirs) mrproper archmrproper
906 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
908 mrproper: clean archmrproper $(mrproper-dirs)
917 @find $(srctree) $(RCS_FIND_IGNORE) \
918 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
919 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
920 -o -name '.*.rej' -o -size 0 \
921 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
922 -type f -print | xargs rm -f
925 # Packaging of the kernel to various formats
926 # ---------------------------------------------------------------------------
927 # rpm target kept for backward compatibility
928 package-dir := $(srctree)/scripts/package
933 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
935 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
938 # Brief documentation of the typical targets used
939 # ---------------------------------------------------------------------------
941 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
942 boards := $(notdir $(boards))
945 @echo 'Cleaning targets:'
946 @echo ' clean - remove most generated files but keep the config'
947 @echo ' mrproper - remove all generated files + config + various backup files'
949 @echo 'Configuration targets:'
950 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
952 @echo 'Other generic targets:'
953 @echo ' all - Build all targets marked with [*]'
954 @echo '* vmlinux - Build the bare kernel'
955 @echo '* modules - Build all modules'
956 @echo ' modules_install - Install all modules'
957 @echo ' dir/ - Build all files in dir and below'
958 @echo ' dir/file.[ois] - Build specified target only'
959 @echo ' rpm - Build a kernel as an RPM package'
960 @echo ' tags/TAGS - Generate tags file for editors'
961 @echo ' cscope - Generate cscope index'
962 @echo ' checkstack - Generate a list of stack hogs'
963 @echo 'Kernel packaging:'
964 @$(MAKE) -f $(package-dir)/Makefile help
966 @echo 'Documentation targets:'
967 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
969 @echo 'Architecture specific targets ($(ARCH)):'
970 @$(if $(archhelp),$(archhelp),\
971 echo ' No architecture specific help defined for $(ARCH)')
974 $(foreach b, $(boards), \
975 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
978 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
979 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
980 @echo ' make C=1 [targets] Check all c source with checker tool'
982 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
983 @echo 'For further info see the ./README file'
986 # Documentation targets
987 # ---------------------------------------------------------------------------
988 %docs: scripts_basic FORCE
989 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
994 # External module support.
995 # When building external modules the kernel used as basis is considered
996 # read-only, and no consistency checks are made and the make
997 # system is not used on the basis kernel. If updates are required
998 # in the basis kernel ordinary make commands (without M=...) must
1001 # The following are the only valid targets when building external
1003 # make M=dir clean Delete all automatically generated files
1004 # make M=dir modules Make all modules in specified dir
1005 # make M=dir Same as 'make M=dir modules'
1006 # make M=dir modules_install
1007 # Install the modules build in the module directory
1008 # Assumes install directory is already created
1010 # We are always building modules
1014 $(Q)mkdir -p $(MODVERDIR)
1016 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1017 .PHONY: $(module-dirs) modules
1018 $(module-dirs): crmodverdir
1019 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1021 modules: $(module-dirs)
1022 @echo ' Building modules, stage 2.';
1023 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1025 .PHONY: modules_install
1027 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1029 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1031 .PHONY: $(clean-dirs) clean
1033 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1035 clean: rm-dirs := $(MODVERDIR)
1036 clean: $(clean-dirs)
1038 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1039 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1040 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1041 -type f -print | xargs rm -f
1044 @echo ' Building external modules.'
1045 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1047 @echo ' modules - default target, build the module(s)'
1048 @echo ' modules_install - install the module'
1049 @echo ' clean - remove generated files in module directory only'
1051 endif # KBUILD_EXTMOD
1053 # Generate tags for editors
1054 # ---------------------------------------------------------------------------
1057 ( find $(srctree) $(RCS_FIND_IGNORE) \
1058 \( -name include -o -name arch \) -prune -o \
1059 -name '*.[chS]' -print; \
1060 find $(srctree)/arch/$(ARCH) $(RCS_FIND_IGNORE) \
1061 -name '*.[chS]' -print; \
1062 find $(srctree)/security/selinux/include $(RCS_FIND_IGNORE) \
1063 -name '*.[chS]' -print; \
1064 find $(srctree)/include $(RCS_FIND_IGNORE) \
1065 \( -name config -o -name 'asm-*' \) -prune \
1066 -o -name '*.[chS]' -print; \
1067 find $(srctree)/include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
1068 -name '*.[chS]' -print; \
1069 find $(srctree)/include/asm-generic $(RCS_FIND_IGNORE) \
1070 -name '*.[chS]' -print )
1073 quiet_cmd_cscope-file = FILELST cscope.files
1074 cmd_cscope-file = $(all-sources) > cscope.files
1076 quiet_cmd_cscope = MAKE cscope.out
1077 cmd_cscope = cscope -k -b -q
1080 $(call cmd,cscope-file)
1083 quiet_cmd_TAGS = MAKE $@
1084 cmd_TAGS = $(all-sources) | etags -
1086 # Exuberant ctags works better with -I
1088 quiet_cmd_tags = MAKE $@
1091 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \
1092 $(all-sources) | xargs ctags $$CTAGSF -a
1102 # Scripts to check various things for consistency
1103 # ---------------------------------------------------------------------------
1106 find * $(RCS_FIND_IGNORE) \
1107 -name '*.[hcS]' -type f -print | sort \
1108 | xargs $(PERL) -w scripts/checkconfig.pl
1111 find * $(RCS_FIND_IGNORE) \
1112 -name '*.[hcS]' -type f -print | sort \
1113 | xargs $(PERL) -w scripts/checkincludes.pl
1116 find * $(RCS_FIND_IGNORE) \
1117 -name '*.[hcS]' -type f -print | sort \
1118 | xargs $(PERL) -w scripts/checkversion.pl
1121 $(PERL) scripts/reference_discarded.pl
1122 $(PERL) scripts/reference_init.pl
1124 endif #ifeq ($(config-targets),1)
1125 endif #ifeq ($(mixed-targets),1)
1129 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1130 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1132 # FIXME Should go into a make.lib or something
1133 # ===========================================================================
1135 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1136 cmd_rmdirs = rm -rf $(rm-dirs)
1138 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1139 cmd_rmfiles = rm -f $(rm-files)
1142 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1143 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1144 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1146 quiet_cmd_as_o_S = AS $@
1147 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1149 # read all saved command lines
1151 targets := $(wildcard $(sort $(targets)))
1152 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1154 ifneq ($(cmd_files),)
1155 $(cmd_files): ; # Do not try to update included dependency files
1156 include $(cmd_files)
1159 # execute the command and also postprocess generated .d dependencies
1162 if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
1163 $(filter-out $(cmd_$(1)),$(cmd_$@))\
1164 $(filter-out $(cmd_$@),$(cmd_$(1)))),\
1166 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
1168 scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
1170 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
1172 # Usage: $(call if_changed_rule,foo)
1173 # will check if $(cmd_foo) changed, or any of the prequisites changed,
1174 # and if so will execute $(rule_foo)
1176 if_changed_rule = $(if $(strip $? \
1177 $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
1178 $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
1181 # If quiet is set, only print short version of command
1183 cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
1185 # filechk is used to check if the content of a generated file is updated.
1187 # define filechk_sample
1188 # echo $KERNELRELEASE
1190 # version.h : Makefile
1191 # $(call filechk,sample)
1192 # The rule defined shall write to stdout the content of the new file.
1193 # The existing file will be compared with the new one.
1194 # - If no file exist it is created
1195 # - If the content differ the new file is used
1196 # - If they are equal no change, and no timestamp update
1201 mkdir -p $(dir $@); \
1202 $(filechk_$(1)) < $< > $@.tmp; \
1203 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
1211 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir
1213 # $(Q)$(MAKE) $(build)=dir
1214 build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
1216 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1218 # $(Q)$(MAKE) $(clean)=dir
1219 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1221 # $(call descend,<dir>,<target>)
1222 # Recursively call a sub-make in <dir> with target <target>
1223 # Usage is deprecated, because make does not see this as an invocation of make.
1224 descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2)
1226 endif # skip-makefile