4 EXTRAVERSION = -1.11_FC2.1.planetlab
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 $(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
145 space := $(nullstring) # end of line
147 # Take the contents of any files called localversion* and the config
148 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
149 # careful not to include files twice if building in the source
150 # directory. LOCALVERSION from the command line override all of this
152 ifeq ($(objtree),$(srctree))
153 localversion-files := $(wildcard $(srctree)/localversion*)
155 localversion-files := $(wildcard $(objtree)/localversion* $(srctree)/localversion*)
158 LOCALVERSION = $(subst $(space),, \
159 $(shell cat /dev/null $(localversion-files)) \
160 $(subst ",,$(CONFIG_LOCALVERSION)))
162 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
164 # SUBARCH tells the usermode build what the underlying arch is. That is set
165 # first, and if a usermode build is happening, the "ARCH=um" on the command
166 # line overrides the setting of ARCH below. If a native build is happening,
167 # then ARCH is assigned, getting whatever value it gets normally, and
168 # SUBARCH is subsequently ignored.
170 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
171 -e s/arm.*/arm/ -e s/sa110/arm/ \
172 -e s/s390x/s390/ -e s/parisc64/parisc/ )
174 # Cross compiling and selecting different set of gcc/bin-utils
175 # ---------------------------------------------------------------------------
177 # When performing cross compilation for other architectures ARCH shall be set
178 # to the target architecture. (See arch/* for the possibilities).
179 # ARCH can be set during invocation of make:
181 # Another way is to have ARCH set in the environment.
182 # The default ARCH is the host where make is executed.
184 # CROSS_COMPILE specify the prefix used for all executables used
185 # during compilation. Only gcc and related bin-utils executables
186 # are prefixed with $(CROSS_COMPILE).
187 # CROSS_COMPILE can be set on the command line
188 # make CROSS_COMPILE=ia64-linux-
189 # Alternatively CROSS_COMPILE can be set in the environment.
190 # Default value for CROSS_COMPILE is not to prefix executables
191 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
196 # Architecture as present in compile.h
197 UTS_MACHINE := $(ARCH)
199 # SHELL used by kbuild
200 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
201 else if [ -x /bin/bash ]; then echo /bin/bash; \
202 else echo sh; fi ; fi)
206 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
209 # Decide whether to build built-in, modular, or both.
210 # Normally, just do built-in.
215 # If we have only "make modules", don't compile built-in objects.
216 # When we're building modules with modversions, we need to consider
217 # the built-in objects during the descend as well, in order to
218 # make sure the checksums are uptodate before we record them.
220 ifeq ($(MAKECMDGOALS),modules)
221 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
224 # If we have "make <whatever> modules", compile modules
225 # in addition to whatever we do anyway.
226 # Just "make" or "make all" shall build modules as well
228 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
232 ifeq ($(MAKECMDGOALS),)
236 export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE
237 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
240 # ---------------------------------------------------------------------------
242 # Normally, we echo the whole command before executing it. By making
243 # that echo $($(quiet)$(cmd)), we now have the possibility to set
244 # $(quiet) to choose other forms of output instead, e.g.
246 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
247 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
249 # If $(quiet) is empty, the whole command will be printed.
250 # If it is set to "quiet_", only the short version will be printed.
251 # If it is set to "silent_", nothing wil be printed at all, since
252 # the variable $(silent_cmd_cc_o_c) doesn't exist.
254 # A simple variant is to prefix commands with $(Q) - that's usefull
255 # for commands that shall be hidden in non-verbose mode.
259 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
260 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
262 ifeq ($(KBUILD_VERBOSE),1)
270 # If the user is running make -s (silent mode), suppress echoing of
273 ifneq ($(findstring s,$(MAKEFLAGS)),)
277 export quiet Q KBUILD_VERBOSE
280 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
281 # See documentation in Documentation/kbuild/makefiles.txt
284 # Usage: cflags-y += $(call gcc-option, -march=winchip-c6, -march=i586)
286 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
287 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
289 # For backward compatibility
290 check_gcc = $(warning check_gcc is deprecated - use cc-option) \
291 $(call cc-option, $(1),$(2))
294 # Usage: flag := $(call gcc-option-yn, -march=winchip-c6)
295 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
296 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
299 # Usage gcc-ver := $(call cc-version $(CC))
300 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
301 $(if $(1), $(1), $(CC)))
304 # Look for make include files relative to root of kernel src
305 MAKEFLAGS += --include-dir=$(srctree)
307 # For maximum performance (+ possibly random breakage, uncomment
312 # Make variables (CC, etc...)
314 AS = $(CROSS_COMPILE)as
315 LD = $(CROSS_COMPILE)ld
316 CC = $(CROSS_COMPILE)gcc
318 AR = $(CROSS_COMPILE)ar
319 NM = $(CROSS_COMPILE)nm
320 STRIP = $(CROSS_COMPILE)strip
321 OBJCOPY = $(CROSS_COMPILE)objcopy
322 OBJDUMP = $(CROSS_COMPILE)objdump
324 GENKSYMS = scripts/genksyms/genksyms
325 DEPMOD = /sbin/depmod
326 KALLSYMS = scripts/kallsyms
329 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__
331 CFLAGS_MODULE = $(MODFLAGS)
332 AFLAGS_MODULE = $(MODFLAGS)
337 NOSTDINC_FLAGS = -nostdinc -iwithprefix include
339 # Use LINUXINCLUDE when you must reference the include/ directory.
340 # Needed to be compatible with the O= option
341 LINUXINCLUDE := -Iinclude \
342 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include)
344 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
346 CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \
347 -fno-strict-aliasing -fno-common
348 AFLAGS := -D__ASSEMBLY__
350 export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
351 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
352 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
353 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
355 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
356 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
357 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
359 # When compiling out-of-tree modules, put MODVERDIR in the module
360 # tree rather than in the kernel tree. The kernel tree might
362 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
364 # The temporary file to save gcc -MD generated dependencies must not
367 depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
369 # Files to ignore in find ... statements
371 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o
372 RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc
374 # ===========================================================================
375 # Rules shared between *config targets and build targets
377 # Basic helpers built in scripts/
378 .PHONY: scripts_basic
380 $(Q)$(MAKE) $(build)=scripts/basic
382 # To make sure we do not include .config for any of the *config targets
383 # catch them early, and hand them over to scripts/kconfig/Makefile
384 # It is allowed to specify more targets when calling make, including
385 # mixing *config targets and build targets.
386 # For example 'make oldconfig all'.
387 # Detect when mixed targets is specified, and make a second invocation
388 # of make so .config is not included in this case either (for *config).
390 no-dot-config-targets := clean mrproper distclean \
391 cscope TAGS tags help %docs check%
397 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
398 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
403 ifeq ($(KBUILD_EXTMOD),)
404 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
406 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
412 ifeq ($(mixed-targets),1)
413 # ===========================================================================
414 # We're called with mixed targets (*config and build targets).
415 # Handle them one by one.
418 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
421 ifeq ($(config-targets),1)
422 # ===========================================================================
423 # *config targets only - make sure prerequisites are updated, and descend
424 # in scripts/kconfig to make the *config target
426 config: scripts_basic FORCE
427 $(Q)$(MAKE) $(build)=scripts/kconfig $@
428 %config: scripts_basic FORCE
429 $(Q)$(MAKE) $(build)=scripts/kconfig $@
432 # ===========================================================================
433 # Build targets only - this includes vmlinux, arch specific targets, clean
434 # targets and others. In general all targets except *config targets.
436 ifeq ($(KBUILD_EXTMOD),)
437 # Additional helpers built in scripts/
438 # Carefully list dependencies so we do not try to build scripts twice
441 scripts: scripts_basic include/config/MARKER
442 $(Q)$(MAKE) $(build)=$(@)
444 scripts_basic: include/linux/autoconf.h
446 # Objects we will link into vmlinux / subdirs we need to visit
448 drivers-y := drivers/ sound/
452 endif # KBUILD_EXTMOD
454 ifeq ($(dot-config),1)
455 # In this section, we need .config
457 # Read in dependencies to all Kconfig* files, make sure to run
458 # oldconfig if changes are detected.
463 # If .config needs to be updated, it will be done via the dependency
464 # that autoconf has on .config.
465 # To avoid any implicit rule to kick in, define an empty command
468 # If .config is newer than include/linux/autoconf.h, someone tinkered
469 # with it and forgot to run make oldconfig
470 include/linux/autoconf.h: .config
471 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
473 # Dummy target needed, because used as prerequisite
474 include/linux/autoconf.h: ;
477 # The all: target is the default when no target is given on the
479 # This allow a user to issue only 'make' to build a kernel including modules
480 # Defaults vmlinux but it is usually overriden in the arch makefile
483 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
489 ifndef CONFIG_FRAME_POINTER
490 CFLAGS += -fomit-frame-pointer
493 ifdef CONFIG_X86_STACK_CHECK
497 ifdef CONFIG_DEBUG_INFO
501 # warn about C99 declaration after statement
502 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
504 include $(srctree)/arch/$(ARCH)/Makefile
506 # Default kernel image to build when no specific target is given.
507 # KBUILD_IMAGE may be overruled on the commandline or
508 # set in the environment
509 # Also any assingments in arch/$(ARCH)/Makefiel take precedence over
511 export KBUILD_IMAGE ?= vmlinux
514 # INSTALL_PATH specifies where to place the updated kernel and system map
515 # images. Uncomment if you want to place them anywhere other than root.
518 #export INSTALL_PATH=/boot
521 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
522 # relocations required by build roots. This is not defined in the
523 # makefile but the arguement can be passed to make if needed.
526 MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
530 ifeq ($(KBUILD_EXTMOD),)
531 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/
533 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
534 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
535 $(net-y) $(net-m) $(libs-y) $(libs-m)))
537 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
539 $(core-n) $(core-) $(drivers-n) $(drivers-) \
540 $(net-n) $(net-) $(libs-n) $(libs-))))
542 init-y := $(patsubst %/, %/built-in.o, $(init-y))
543 core-y := $(patsubst %/, %/built-in.o, $(core-y))
544 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
545 net-y := $(patsubst %/, %/built-in.o, $(net-y))
546 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
547 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
548 libs-y := $(libs-y1) $(libs-y2)
551 # ---------------------------------------------------------------------------
552 # vmlinux is build from the objects selected by $(vmlinux-init) and
553 # $(vmlinux-main). Most are built-in.o files from top-level directories
554 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
555 # Ordering when linking is important, and $(vmlinux-init) must be first.
560 # +-< $(vmlinux-init)
561 # | +--< init/version.o + more
563 # +--< $(vmlinux-main)
564 # | +--< driver/built-in.o mm/built-in.o + more
566 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
568 # vmlinux version (uname -v) cannot be updated during normal
569 # descending-into-subdirs phase since we do not yet know if we need to
571 # Therefore this step is delayed until just before final link of vmlinux -
572 # except in the kallsyms case where it is done just before adding the
573 # symbols to the kernel.
575 # System.map is generated to document addresses of all kernel symbols
577 vmlinux-init := $(head-y) $(init-y)
578 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
579 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
580 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
582 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
583 # May be overridden by arch/$(ARCH)/Makefile
584 quiet_cmd_vmlinux__ ?= LD $@
585 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
586 -T $(vmlinux-lds) $(vmlinux-init) \
587 --start-group $(vmlinux-main) --end-group \
588 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
590 # Generate new vmlinux version
591 quiet_cmd_vmlinux_version = GEN .version
592 cmd_vmlinux_version = set -e; \
593 . $(srctree)/scripts/mkversion > .tmp_version; \
594 mv -f .tmp_version .version; \
595 $(MAKE) $(build)=init
597 # Generate System.map
598 quiet_cmd_sysmap = SYSMAP
599 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
602 # If CONFIG_KALLSYMS is set .version is already updated
603 # Generate System.map and verify that the content is consistent
605 define rule_vmlinux__
606 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
608 $(call cmd,vmlinux__)
609 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
611 $(Q)$(if $($(quiet)cmd_sysmap), \
612 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
613 $(cmd_sysmap) $@ System.map; \
614 if [ $$? -ne 0 ]; then \
622 ifdef CONFIG_KALLSYMS
623 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
624 # It's a three stage process:
625 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
627 # Running kallsyms on that gives us .tmp_kallsyms1.o with
628 # the right size - vmlinux version (uname -v) is updated during this step
629 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
630 # but due to the added section, some addresses have shifted.
631 # From here, we generate a correct .tmp_kallsyms2.o
632 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
633 # o Verify that the System.map from vmlinux matches the map from
634 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
635 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
636 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
637 # temporary bypass to allow the kernel to be built while the
638 # maintainers work out what went wrong with kallsyms.
640 ifdef CONFIG_KALLSYMS_EXTRA_PASS
646 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
648 define verify_kallsyms
649 $(Q)$(if $($(quiet)cmd_sysmap), \
650 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
651 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
652 $(Q)cmp -s System.map .tmp_System.map || \
653 (echo Inconsistent kallsyms data; \
654 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
655 rm .tmp_kallsyms* ; /bin/false )
658 # Update vmlinux version before link
659 # Use + in front of this rule to silent warning about make -j1
660 cmd_ksym_ld = $(cmd_vmlinux__)
662 +$(call cmd,vmlinux_version)
663 $(call cmd,vmlinux__)
664 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
667 # Generate .S file with all kernel symbols
668 quiet_cmd_kallsyms = KSYM $@
669 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
670 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
672 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
673 $(call if_changed_dep,as_o_S)
675 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
678 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
679 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
680 $(call if_changed_rule,ksym_ld)
682 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
683 $(call if_changed,vmlinux__)
685 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
686 $(call if_changed,vmlinux__)
688 # Needs to visit scripts/ before $(KALLSYMS) can be used.
689 $(KALLSYMS): scripts ;
691 endif # ifdef CONFIG_KALLSYMS
693 # vmlinux image - including updated kernel symbols
694 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
695 $(call if_changed_rule,vmlinux__)
697 # The actual objects are generated when descending,
698 # make sure no implicit rule kicks in
699 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
701 # Handle descending into subdirectories listed in $(vmlinux-dirs)
702 # Preset locale variables to speed up the build process. Limit locale
703 # tweaks to this spot to avoid wrong language settings when running
704 # make menuconfig etc.
705 # Error messages still appears in the original language
707 .PHONY: $(vmlinux-dirs)
708 $(vmlinux-dirs): prepare-all scripts
709 $(Q)$(MAKE) $(build)=$@
711 # Things we need to do before we recursively start building the kernel
712 # or the modules are listed in "prepare-all".
713 # A multi level approach is used. prepare1 is updated first, then prepare0.
714 # prepare-all is the collection point for the prepare targets.
716 .PHONY: prepare-all prepare prepare0 prepare1 prepare2
718 # prepare 2 generate Makefile to be placed in output directory, if
719 # using a seperate output directory. This allows convinient use
720 # of make in output directory
722 $(Q)if /usr/bin/env test ! $(srctree) -ef $(objtree); then \
723 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
724 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
725 > $(objtree)/Makefile; \
728 # prepare1 is used to check if we are building in a separate output directory,
730 # 1) Check that make has not been executed in the kernel src $(srctree)
731 # 2) Create the include2 directory, used for the second asm symlink
734 ifneq ($(KBUILD_SRC),)
735 @echo ' Using $(srctree) as source for kernel'
736 $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \
737 echo " $(srctree) is not clean, please run 'make mrproper'";\
738 echo " in the '$(srctree)' directory.";\
741 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
742 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
745 prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER
746 ifneq ($(KBUILD_MODULES),)
747 $(Q)rm -rf $(MODVERDIR)
748 $(Q)mkdir -p $(MODVERDIR)
751 # All the preparing..
752 prepare-all: prepare0 prepare
754 # Leave this as default for preprocessing vmlinux.lds.S, which is now
755 # done in arch/$(ARCH)/kernel/Makefile
757 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
760 # ---------------------------------------------------------------------------
762 %.s: %.c scripts FORCE
763 $(Q)$(MAKE) $(build)=$(@D) $@
764 %.i: %.c scripts FORCE
765 $(Q)$(MAKE) $(build)=$(@D) $@
766 %.o: %.c scripts FORCE
767 $(Q)$(MAKE) $(build)=$(@D) $@
768 %/: scripts prepare FORCE
769 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
770 %.lst: %.c scripts FORCE
771 $(Q)$(MAKE) $(build)=$(@D) $@
772 %.s: %.S scripts FORCE
773 $(Q)$(MAKE) $(build)=$(@D) $@
774 %.o: %.S scripts FORCE
775 $(Q)$(MAKE) $(build)=$(@D) $@
777 # FIXME: The asm symlink changes when $(ARCH) changes. That's
778 # hard to detect, but I suppose "make mrproper" is a good idea
779 # before switching between archs anyway.
782 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
783 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
784 @ln -fsn asm-$(ARCH) $@
786 # Split autoconf.h into include/linux/config/*
788 include/config/MARKER: include/linux/autoconf.h
789 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
790 @scripts/basic/split-include include/linux/autoconf.h include/config
793 # Generate some files
794 # ---------------------------------------------------------------------------
796 # KERNELRELEASE can change from a few different places, meaning version.h
797 # needs to be updated, so this check is forced on all builds
801 define filechk_version.h
802 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
803 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
806 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
807 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
808 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
812 include/linux/version.h: $(srctree)/Makefile FORCE
813 $(call filechk,version.h)
815 # ---------------------------------------------------------------------------
819 @echo '*** Warning: make $@ is unnecessary now.'
821 # ---------------------------------------------------------------------------
826 # By default, build modules as well
833 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
834 @echo ' Building modules, stage 2.';
835 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
838 # Target to prepare building external modules
839 .PHONY: modules_prepare
840 modules_prepare: prepare-all scripts
842 # Target to install modules
843 .PHONY: modules_install
844 modules_install: _modinst_ _modinst_post
848 @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \
849 echo "Warning: you may need to install module-init-tools"; \
850 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
853 @rm -rf $(MODLIB)/kernel
854 @rm -f $(MODLIB)/source
855 @mkdir -p $(MODLIB)/kernel
856 @ln -s $(srctree) $(MODLIB)/source
857 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
858 rm -f $(MODLIB)/build ; \
859 ln -s $(objtree) $(MODLIB)/build ; \
861 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
863 # If System.map exists, run depmod. This deliberately does not have a
864 # dependency on System.map since that would run the dependency tree on
865 # vmlinux. This depmod is only for convenience to give the initial
866 # boot a modules.dep even before / is mounted read-write. However the
867 # boot script depmod is the master version.
868 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
871 depmod_opts := -b $(INSTALL_MOD_PATH) -r
873 .PHONY: _modinst_post
874 _modinst_post: _modinst_
875 if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
877 else # CONFIG_MODULES
879 # Modules not configured
880 # ---------------------------------------------------------------------------
882 modules modules_install: FORCE
884 @echo "The present kernel configuration has modules disabled."
885 @echo "Type 'make config' and enable loadable module support."
886 @echo "Then build a kernel with module support enabled."
890 endif # CONFIG_MODULES
892 # Generate asm-offsets.h
893 # ---------------------------------------------------------------------------
895 define filechk_gen-asm-offsets
897 echo "#ifndef __ASM_OFFSETS_H__"; \
898 echo "#define __ASM_OFFSETS_H__"; \
900 echo " * DO NOT MODIFY."; \
902 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
906 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
913 # Cleaning is done on three levels.
914 # make clean Delete most generated files
915 # Leave enough to build external modules
916 # make mrproper Delete the current configuration, and all generated files
917 # make distclean Remove editor backup files, patch leftover files and the like
919 # Directories & files removed with 'make clean'
920 CLEAN_DIRS += $(MODVERDIR)
921 CLEAN_FILES += vmlinux System.map \
922 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
924 # Directories & files removed with 'make mrproper'
925 MRPROPER_DIRS += include/config include2
926 MRPROPER_FILES += .config .config.old include/asm .version \
927 include/linux/autoconf.h include/linux/version.h \
928 Module.symvers tags TAGS cscope*
930 # clean - Delete most, but leave enough to build external modules
932 clean: rm-dirs := $(CLEAN_DIRS)
933 clean: rm-files := $(CLEAN_FILES)
934 clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs))
936 .PHONY: $(clean-dirs) clean archclean
938 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
940 clean: archclean $(clean-dirs)
943 @find . $(RCS_FIND_IGNORE) \
944 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
945 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
946 -type f -print | xargs rm -f
948 # mrproper - Delete all generated files, including .config
950 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
951 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
952 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
954 .PHONY: $(mrproper-dirs) mrproper archmrproper
956 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
958 mrproper: clean archmrproper $(mrproper-dirs)
967 @find $(srctree) $(RCS_FIND_IGNORE) \
968 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
969 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
970 -o -name '.*.rej' -o -size 0 \
971 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
972 -type f -print | xargs rm -f
975 # Packaging of the kernel to various formats
976 # ---------------------------------------------------------------------------
977 # rpm target kept for backward compatibility
978 package-dir := $(srctree)/scripts/package
983 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
985 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
988 # Brief documentation of the typical targets used
989 # ---------------------------------------------------------------------------
991 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
992 boards := $(notdir $(boards))
995 @echo 'Cleaning targets:'
996 @echo ' clean - remove most generated files but keep the config'
997 @echo ' mrproper - remove all generated files + config + various backup files'
999 @echo 'Configuration targets:'
1000 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1002 @echo 'Other generic targets:'
1003 @echo ' all - Build all targets marked with [*]'
1004 @echo '* vmlinux - Build the bare kernel'
1005 @echo '* modules - Build all modules'
1006 @echo ' modules_install - Install all modules'
1007 @echo ' dir/ - Build all files in dir and below'
1008 @echo ' dir/file.[ois] - Build specified target only'
1009 @echo ' rpm - Build a kernel as an RPM package'
1010 @echo ' tags/TAGS - Generate tags file for editors'
1011 @echo ' cscope - Generate cscope index'
1013 @echo 'Static analysers'
1014 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1015 @echo ' and init sections from non-init sections'
1016 @echo ' checkstack - Generate a list of stack hogs'
1017 @echo ' namespacecheck - Name space analysis on compiled kernel'
1019 @echo 'Kernel packaging:'
1020 @$(MAKE) -f $(package-dir)/Makefile help
1022 @echo 'Documentation targets:'
1023 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1025 @echo 'Architecture specific targets ($(ARCH)):'
1026 @$(if $(archhelp),$(archhelp),\
1027 echo ' No architecture specific help defined for $(ARCH)')
1030 $(foreach b, $(boards), \
1031 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1034 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1035 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1036 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1037 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1039 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1040 @echo 'For further info see the ./README file'
1043 # Documentation targets
1044 # ---------------------------------------------------------------------------
1045 %docs: scripts_basic FORCE
1046 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1048 else # KBUILD_EXTMOD
1051 # External module support.
1052 # When building external modules the kernel used as basis is considered
1053 # read-only, and no consistency checks are made and the make
1054 # system is not used on the basis kernel. If updates are required
1055 # in the basis kernel ordinary make commands (without M=...) must
1058 # The following are the only valid targets when building external
1060 # make M=dir clean Delete all automatically generated files
1061 # make M=dir modules Make all modules in specified dir
1062 # make M=dir Same as 'make M=dir modules'
1063 # make M=dir modules_install
1064 # Install the modules build in the module directory
1065 # Assumes install directory is already created
1067 # We are always building modules
1071 $(Q)mkdir -p $(MODVERDIR)
1073 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1074 .PHONY: $(module-dirs) modules
1075 $(module-dirs): crmodverdir
1076 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1078 modules: $(module-dirs)
1079 @echo ' Building modules, stage 2.';
1080 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1082 .PHONY: modules_install
1084 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1086 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1088 .PHONY: $(clean-dirs) clean
1090 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1092 clean: rm-dirs := $(MODVERDIR)
1093 clean: $(clean-dirs)
1095 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1096 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1097 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1098 -type f -print | xargs rm -f
1101 @echo ' Building external modules.'
1102 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1104 @echo ' modules - default target, build the module(s)'
1105 @echo ' modules_install - install the module'
1106 @echo ' clean - remove generated files in module directory only'
1108 endif # KBUILD_EXTMOD
1110 # Generate tags for editors
1111 # ---------------------------------------------------------------------------
1114 ( find $(srctree) $(RCS_FIND_IGNORE) \
1115 \( -name include -o -name arch \) -prune -o \
1116 -name '*.[chS]' -print; \
1117 find $(srctree)/arch/$(ARCH) $(RCS_FIND_IGNORE) \
1118 -name '*.[chS]' -print; \
1119 find $(srctree)/security/selinux/include $(RCS_FIND_IGNORE) \
1120 -name '*.[chS]' -print; \
1121 find $(srctree)/include $(RCS_FIND_IGNORE) \
1122 \( -name config -o -name 'asm-*' \) -prune \
1123 -o -name '*.[chS]' -print; \
1124 find $(srctree)/include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
1125 -name '*.[chS]' -print; \
1126 find $(srctree)/include/asm-generic $(RCS_FIND_IGNORE) \
1127 -name '*.[chS]' -print )
1130 quiet_cmd_cscope-file = FILELST cscope.files
1131 cmd_cscope-file = $(all-sources) > cscope.files
1133 quiet_cmd_cscope = MAKE cscope.out
1134 cmd_cscope = cscope -k -b -q
1137 $(call cmd,cscope-file)
1140 quiet_cmd_TAGS = MAKE $@
1141 cmd_TAGS = $(all-sources) | etags -
1143 # Exuberant ctags works better with -I
1145 quiet_cmd_tags = MAKE $@
1148 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \
1149 $(all-sources) | xargs ctags $$CTAGSF -a
1159 # Scripts to check various things for consistency
1160 # ---------------------------------------------------------------------------
1163 find * $(RCS_FIND_IGNORE) \
1164 -name '*.[hcS]' -type f -print | sort \
1165 | xargs $(PERL) -w scripts/checkconfig.pl
1168 find * $(RCS_FIND_IGNORE) \
1169 -name '*.[hcS]' -type f -print | sort \
1170 | xargs $(PERL) -w scripts/checkincludes.pl
1173 find * $(RCS_FIND_IGNORE) \
1174 -name '*.[hcS]' -type f -print | sort \
1175 | xargs $(PERL) -w scripts/checkversion.pl
1178 $(PERL) $(srctree)/scripts/reference_discarded.pl
1179 $(PERL) $(srctree)/scripts/reference_init.pl
1182 $(PERL) $(srctree)/scripts/namespace.pl
1184 endif #ifeq ($(config-targets),1)
1185 endif #ifeq ($(mixed-targets),1)
1189 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1190 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1192 # FIXME Should go into a make.lib or something
1193 # ===========================================================================
1195 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1196 cmd_rmdirs = rm -rf $(rm-dirs)
1198 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1199 cmd_rmfiles = rm -f $(rm-files)
1202 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1203 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1204 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1206 quiet_cmd_as_o_S = AS $@
1207 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1209 # read all saved command lines
1211 targets := $(wildcard $(sort $(targets)))
1212 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1214 ifneq ($(cmd_files),)
1215 $(cmd_files): ; # Do not try to update included dependency files
1216 include $(cmd_files)
1219 # Execute command and generate cmd file
1220 if_changed = $(if $(strip $? \
1221 $(filter-out $(cmd_$(1)),$(cmd_$@))\
1222 $(filter-out $(cmd_$@),$(cmd_$(1)))),\
1224 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
1226 echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
1229 # execute the command and also postprocess generated .d dependencies
1231 if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
1232 $(filter-out $(cmd_$(1)),$(cmd_$@))\
1233 $(filter-out $(cmd_$@),$(cmd_$(1)))),\
1235 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
1237 scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
1239 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
1241 # Usage: $(call if_changed_rule,foo)
1242 # will check if $(cmd_foo) changed, or any of the prequisites changed,
1243 # and if so will execute $(rule_foo)
1245 if_changed_rule = $(if $(strip $? \
1246 $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
1247 $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
1250 # If quiet is set, only print short version of command
1252 cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
1254 # filechk is used to check if the content of a generated file is updated.
1256 # define filechk_sample
1257 # echo $KERNELRELEASE
1259 # version.h : Makefile
1260 # $(call filechk,sample)
1261 # The rule defined shall write to stdout the content of the new file.
1262 # The existing file will be compared with the new one.
1263 # - If no file exist it is created
1264 # - If the content differ the new file is used
1265 # - If they are equal no change, and no timestamp update
1270 mkdir -p $(dir $@); \
1271 $(filechk_$(1)) < $< > $@.tmp; \
1272 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
1280 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir
1282 # $(Q)$(MAKE) $(build)=dir
1283 build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
1285 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1287 # $(Q)$(MAKE) $(clean)=dir
1288 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1290 # $(call descend,<dir>,<target>)
1291 # Recursively call a sub-make in <dir> with target <target>
1292 # Usage is deprecated, because make does not see this as an invocation of make.
1293 descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2)
1295 endif # skip-makefile