5 NAME = Arr Matey! A Hairy Bilge Rat!
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.
14 # o use make's built-in rules and variables
15 # (this increases performance and avoid hard-to-debug behavour);
16 # o print "Entering directory ...";
17 MAKEFLAGS += -rR --no-print-directory
19 # We are using a recursive build, so we need to do a little thinking
20 # to get the ordering right.
22 # Most importantly: sub-Makefiles should only ever modify files in
23 # their own directory. If in some directory we have a dependency on
24 # a file in another dir (which doesn't happen often, but it's often
25 # unavoidable when linking the built-in.o targets which finally
26 # turn into vmlinux), we will call a sub make in that other dir, and
27 # after that we are sure that everything which is in that other dir
30 # The only cases where we need to modify files which have global
31 # effects are thus separated out and done before the recursive
32 # descending is started. They are now explicitly listed as the
35 # To put more focus on warnings, be less verbose as default
36 # Use 'make V=1' to see the full commands
39 ifeq ("$(origin V)", "command line")
47 # Call a source code checker (by default, "sparse") as part of the
50 # Use 'make C=1' to enable checking of only re-compiled files.
51 # Use 'make C=2' to enable checking of *all* source files, regardless
52 # of whether they are re-compiled or not.
54 # See the file "Documentation/sparse.txt" for more details, including
55 # where to get the "sparse" utility.
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
62 ifndef KBUILD_CHECKSRC
66 # Use make M=dir to specify directory of external module to build
67 # Old syntax make ... SUBDIRS=$PWD is still supported
68 # Setting the environment variable KBUILD_EXTMOD take precedence
70 KBUILD_EXTMOD ?= $(SUBDIRS)
73 ifeq ("$(origin M)", "command line")
79 # kbuild supports saving output files in a separate directory.
80 # To locate output files in a separate directory two syntaxes are supported.
81 # In both cases the working directory must be the root of the kernel src.
83 # Use "make O=dir/to/store/output/files/"
85 # 2) Set KBUILD_OUTPUT
86 # Set the environment variable KBUILD_OUTPUT to point to the directory
87 # where the output files shall be placed.
88 # export KBUILD_OUTPUT=dir/to/store/output/files/
91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
95 # KBUILD_SRC is set on invocation of make in OBJ directory
96 # KBUILD_SRC is not intended to be used by the regular user (for now)
99 # OK, Make called in directory where kernel src resides
100 # Do we want to locate output files in a separate directory?
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
107 # That's our default target when none is given on the command line
111 ifneq ($(KBUILD_OUTPUT),)
112 # Invoke a second make in the output directory, passing relevant variables
113 # check that the output directory actually exists
114 saved-output := $(KBUILD_OUTPUT)
115 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
116 $(if $(KBUILD_OUTPUT),, \
117 $(error output directory "$(saved-output)" does not exist))
118 # Check that OUTPUT directory is not the same as where we have kernel src
119 $(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \
120 $(error Output directory (O=...) specifies kernel src dir))
122 PHONY += $(MAKECMDGOALS) sub-make
124 $(filter-out _all sub-make,$(MAKECMDGOALS)) _all: sub-make
128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
129 KBUILD_SRC=$(CURDIR) \
130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
131 $(filter-out _all sub-make,$(MAKECMDGOALS))
133 # Leave processing to above invocation of make
135 endif # ifneq ($(KBUILD_OUTPUT),)
136 endif # ifeq ($(KBUILD_SRC),)
138 # We process the rest of the Makefile if this is the final invocation of make
139 ifeq ($(skip-makefile),)
141 # If building an external module we do not care about the all: rule
142 # but instead _all depend on modules
144 ifeq ($(KBUILD_EXTMOD),)
150 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
152 # FIXME - TOPDIR is obsolete, use srctree/objtree
157 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
159 export srctree objtree VPATH TOPDIR
162 # SUBARCH tells the usermode build what the underlying arch is. That is set
163 # first, and if a usermode build is happening, the "ARCH=um" on the command
164 # line overrides the setting of ARCH below. If a native build is happening,
165 # then ARCH is assigned, getting whatever value it gets normally, and
166 # SUBARCH is subsequently ignored.
168 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
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 := $(ARCH)
200 # Additional ARCH settings for x86
205 ifeq ($(ARCH),x86_64)
210 KCONFIG_CONFIG ?= .config
212 # SHELL used by kbuild
213 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
214 else if [ -x /bin/bash ]; then echo /bin/bash; \
215 else echo sh; fi ; fi)
219 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
222 # Decide whether to build built-in, modular, or both.
223 # Normally, just do built-in.
228 # If we have only "make modules", don't compile built-in objects.
229 # When we're building modules with modversions, we need to consider
230 # the built-in objects during the descend as well, in order to
231 # make sure the checksums are up to date before we record them.
233 ifeq ($(MAKECMDGOALS),modules)
234 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
237 # If we have "make <whatever> modules", compile modules
238 # in addition to whatever we do anyway.
239 # Just "make" or "make all" shall build modules as well
241 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
245 ifeq ($(MAKECMDGOALS),)
249 export KBUILD_MODULES KBUILD_BUILTIN
250 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
253 # ---------------------------------------------------------------------------
255 # Normally, we echo the whole command before executing it. By making
256 # that echo $($(quiet)$(cmd)), we now have the possibility to set
257 # $(quiet) to choose other forms of output instead, e.g.
259 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
260 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
262 # If $(quiet) is empty, the whole command will be printed.
263 # If it is set to "quiet_", only the short version will be printed.
264 # If it is set to "silent_", nothing will be printed at all, since
265 # the variable $(silent_cmd_cc_o_c) doesn't exist.
267 # A simple variant is to prefix commands with $(Q) - that's useful
268 # for commands that shall be hidden in non-verbose mode.
272 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
273 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
275 ifeq ($(KBUILD_VERBOSE),1)
283 # If the user is running make -s (silent mode), suppress echoing of
286 ifneq ($(findstring s,$(MAKEFLAGS)),)
290 export quiet Q KBUILD_VERBOSE
293 # Look for make include files relative to root of kernel src
294 MAKEFLAGS += --include-dir=$(srctree)
296 # We need some generic definitions.
297 include $(srctree)/scripts/Kbuild.include
299 # Make variables (CC, etc...)
301 AS = $(CROSS_COMPILE)as
302 LD = $(CROSS_COMPILE)ld
303 CC = $(CROSS_COMPILE)gcc
305 AR = $(CROSS_COMPILE)ar
306 NM = $(CROSS_COMPILE)nm
307 STRIP = $(CROSS_COMPILE)strip
308 OBJCOPY = $(CROSS_COMPILE)objcopy
309 OBJDUMP = $(CROSS_COMPILE)objdump
311 GENKSYMS = scripts/genksyms/genksyms
312 DEPMOD = /sbin/depmod
313 KALLSYMS = scripts/kallsyms
317 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
319 CFLAGS_MODULE = $(MODFLAGS)
320 AFLAGS_MODULE = $(MODFLAGS)
326 # Use LINUXINCLUDE when you must reference the include/ directory.
327 # Needed to be compatible with the O= option
328 LINUXINCLUDE := -Iinclude \
329 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
330 -include include/linux/autoconf.h
332 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
334 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
335 -fno-strict-aliasing -fno-common \
336 -Werror-implicit-function-declaration
337 KBUILD_AFLAGS := -D__ASSEMBLY__
339 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
340 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
341 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
343 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
344 export ARCH SRCARCH K64BIT CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
345 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
346 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
348 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
349 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
350 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
352 # When compiling out-of-tree modules, put MODVERDIR in the module
353 # tree rather than in the kernel tree. The kernel tree might
355 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
357 # Files to ignore in find ... statements
359 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
360 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
362 # ===========================================================================
363 # Rules shared between *config targets and build targets
365 # Basic helpers built in scripts/
366 PHONY += scripts_basic
368 $(Q)$(MAKE) $(build)=scripts/basic
370 # To avoid any implicit rule to kick in, define an empty command.
371 scripts/basic/%: scripts_basic ;
373 PHONY += outputmakefile
374 # outputmakefile generates a Makefile in the output directory, if using a
375 # separate output directory. This allows convenient use of make in the
378 ifneq ($(KBUILD_SRC),)
379 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
380 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
383 # To make sure we do not include .config for any of the *config targets
384 # catch them early, and hand them over to scripts/kconfig/Makefile
385 # It is allowed to specify more targets when calling make, including
386 # mixing *config targets and build targets.
387 # For example 'make oldconfig all'.
388 # Detect when mixed targets is specified, and make a second invocation
389 # of make so .config is not included in this case either (for *config).
391 no-dot-config-targets := clean mrproper distclean \
392 cscope TAGS tags help %docs check% \
393 include/linux/version.h headers_% \
394 kernelrelease kernelversion
400 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
401 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
406 ifeq ($(KBUILD_EXTMOD),)
407 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
409 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
415 ifeq ($(mixed-targets),1)
416 # ===========================================================================
417 # We're called with mixed targets (*config and build targets).
418 # Handle them one by one.
421 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
424 ifeq ($(config-targets),1)
425 # ===========================================================================
426 # *config targets only - make sure prerequisites are updated, and descend
427 # in scripts/kconfig to make the *config target
429 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
430 # KBUILD_DEFCONFIG may point out an alternative default configuration
431 # used for 'make defconfig'
432 include $(srctree)/arch/$(SRCARCH)/Makefile
433 export KBUILD_DEFCONFIG
435 config %config: scripts_basic outputmakefile FORCE
436 $(Q)mkdir -p include/linux include/config
437 $(Q)$(MAKE) $(build)=scripts/kconfig $@
440 # ===========================================================================
441 # Build targets only - this includes vmlinux, arch specific targets, clean
442 # targets and others. In general all targets except *config targets.
444 ifeq ($(KBUILD_EXTMOD),)
445 # Additional helpers built in scripts/
446 # Carefully list dependencies so we do not try to build scripts twice
449 scripts: scripts_basic include/config/auto.conf
450 $(Q)$(MAKE) $(build)=$(@)
452 # Objects we will link into vmlinux / subdirs we need to visit
454 drivers-y := drivers/ sound/
458 endif # KBUILD_EXTMOD
460 ifeq ($(dot-config),1)
462 -include include/config/auto.conf
464 ifeq ($(KBUILD_EXTMOD),)
465 # Read in dependencies to all Kconfig* files, make sure to run
466 # oldconfig if changes are detected.
467 -include include/config/auto.conf.cmd
469 # To avoid any implicit rule to kick in, define an empty command
470 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
472 # If .config is newer than include/config/auto.conf, someone tinkered
473 # with it and forgot to run make oldconfig.
474 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
475 # we execute the config step to be sure to catch updated Kconfig files
476 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
477 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
479 # external modules needs include/linux/autoconf.h and include/config/auto.conf
480 # but do not care if they are up-to-date. Use auto.conf to trigger the test
481 PHONY += include/config/auto.conf
483 include/config/auto.conf:
484 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
486 echo " ERROR: Kernel configuration is invalid."; \
487 echo " include/linux/autoconf.h or $@ are missing."; \
488 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
492 endif # KBUILD_EXTMOD
495 # Dummy target needed, because used as prerequisite
496 include/config/auto.conf: ;
497 endif # $(dot-config)
499 # The all: target is the default when no target is given on the
501 # This allow a user to issue only 'make' to build a kernel including modules
502 # Defaults vmlinux but it is usually overridden in the arch makefile
505 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
511 include $(srctree)/arch/$(SRCARCH)/Makefile
513 ifdef CONFIG_FRAME_POINTER
514 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
516 KBUILD_CFLAGS += -fomit-frame-pointer
519 ifdef CONFIG_DEBUG_INFO
521 KBUILD_AFLAGS += -gdwarf-2
524 # Force gcc to behave correct even for buggy distributions
525 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
527 # arch Makefile may override CC so keep this after arch Makefile is included
528 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
529 CHECKFLAGS += $(NOSTDINC_FLAGS)
531 # warn about C99 declaration after statement
532 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
534 # disable pointer signed / unsigned warnings in gcc 4.0
535 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
537 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
538 # But warn user when we do so
540 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
542 ifneq ($(KCPPFLAGS),)
543 $(call warn-assign,CPPFLAGS)
544 KBUILD_CPPFLAGS += $(KCPPFLAGS)
547 $(call warn-assign,AFLAGS)
548 KBUILD_AFLAGS += $(KAFLAGS)
551 $(call warn-assign,CFLAGS)
552 KBUILD_CFLAGS += $(KCFLAGS)
555 # Use --build-id when available.
556 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
557 $(call ld-option, -Wl$(comma)--build-id,))
558 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
559 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
561 # Default kernel image to build when no specific target is given.
562 # KBUILD_IMAGE may be overruled on the command line or
563 # set in the environment
564 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
566 export KBUILD_IMAGE ?= vmlinux
569 # INSTALL_PATH specifies where to place the updated kernel and system map
570 # images. Default is /boot, but you can set it to other values
571 export INSTALL_PATH ?= /boot
574 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
575 # relocations required by build roots. This is not defined in the
576 # makefile but the argument can be passed to make if needed.
579 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
583 # INSTALL_MOD_STRIP, if defined, will cause modules to be
584 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
585 # the default option --strip-debug will be used. Otherwise,
586 # INSTALL_MOD_STRIP will used as the options to the strip command.
588 ifdef INSTALL_MOD_STRIP
589 ifeq ($(INSTALL_MOD_STRIP),1)
590 mod_strip_cmd = $(STRIP) --strip-debug
592 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
593 endif # INSTALL_MOD_STRIP=1
596 endif # INSTALL_MOD_STRIP
600 ifeq ($(KBUILD_EXTMOD),)
601 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
603 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
604 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
605 $(net-y) $(net-m) $(libs-y) $(libs-m)))
607 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
609 $(core-n) $(core-) $(drivers-n) $(drivers-) \
610 $(net-n) $(net-) $(libs-n) $(libs-))))
612 init-y := $(patsubst %/, %/built-in.o, $(init-y))
613 core-y := $(patsubst %/, %/built-in.o, $(core-y))
614 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
615 net-y := $(patsubst %/, %/built-in.o, $(net-y))
616 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
617 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
618 libs-y := $(libs-y1) $(libs-y2)
621 # ---------------------------------------------------------------------------
622 # vmlinux is built from the objects selected by $(vmlinux-init) and
623 # $(vmlinux-main). Most are built-in.o files from top-level directories
624 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
625 # Ordering when linking is important, and $(vmlinux-init) must be first.
630 # +-< $(vmlinux-init)
631 # | +--< init/version.o + more
633 # +--< $(vmlinux-main)
634 # | +--< driver/built-in.o mm/built-in.o + more
636 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
638 # vmlinux version (uname -v) cannot be updated during normal
639 # descending-into-subdirs phase since we do not yet know if we need to
641 # Therefore this step is delayed until just before final link of vmlinux -
642 # except in the kallsyms case where it is done just before adding the
643 # symbols to the kernel.
645 # System.map is generated to document addresses of all kernel symbols
647 vmlinux-init := $(head-y) $(init-y)
648 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
649 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
650 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
651 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
653 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
654 # May be overridden by arch/$(ARCH)/Makefile
655 quiet_cmd_vmlinux__ ?= LD $@
656 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
657 -T $(vmlinux-lds) $(vmlinux-init) \
658 --start-group $(vmlinux-main) --end-group \
659 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
661 # Generate new vmlinux version
662 quiet_cmd_vmlinux_version = GEN .version
663 cmd_vmlinux_version = set -e; \
664 if [ ! -r .version ]; then \
668 mv .version .old_version; \
669 expr 0$$(cat .old_version) + 1 >.version; \
671 $(MAKE) $(build)=init
673 # Generate System.map
674 quiet_cmd_sysmap = SYSMAP
675 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
678 # If CONFIG_KALLSYMS is set .version is already updated
679 # Generate System.map and verify that the content is consistent
680 # Use + in front of the vmlinux_version rule to silent warning with make -j2
681 # First command is ':' to allow us to use + in front of the rule
682 define rule_vmlinux__
684 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
686 $(call cmd,vmlinux__)
687 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
689 $(Q)$(if $($(quiet)cmd_sysmap), \
690 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
691 $(cmd_sysmap) $@ System.map; \
692 if [ $$? -ne 0 ]; then \
700 ifdef CONFIG_KALLSYMS
701 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
702 # It's a three stage process:
703 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
705 # Running kallsyms on that gives us .tmp_kallsyms1.o with
706 # the right size - vmlinux version (uname -v) is updated during this step
707 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
708 # but due to the added section, some addresses have shifted.
709 # From here, we generate a correct .tmp_kallsyms2.o
710 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
711 # o Verify that the System.map from vmlinux matches the map from
712 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
713 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
714 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
715 # temporary bypass to allow the kernel to be built while the
716 # maintainers work out what went wrong with kallsyms.
718 ifdef CONFIG_KALLSYMS_EXTRA_PASS
724 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
726 define verify_kallsyms
727 $(Q)$(if $($(quiet)cmd_sysmap), \
728 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
729 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
730 $(Q)cmp -s System.map .tmp_System.map || \
731 (echo Inconsistent kallsyms data; \
732 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
733 rm .tmp_kallsyms* ; /bin/false )
736 # Update vmlinux version before link
737 # Use + in front of this rule to silent warning about make -j1
738 # First command is ':' to allow us to use + in front of this rule
739 cmd_ksym_ld = $(cmd_vmlinux__)
742 +$(call cmd,vmlinux_version)
743 $(call cmd,vmlinux__)
744 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
747 # Generate .S file with all kernel symbols
748 quiet_cmd_kallsyms = KSYM $@
749 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
750 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
752 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
753 $(call if_changed_dep,as_o_S)
755 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
758 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
759 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
760 $(call if_changed_rule,ksym_ld)
762 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
763 $(call if_changed,vmlinux__)
765 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
766 $(call if_changed,vmlinux__)
768 # Needs to visit scripts/ before $(KALLSYMS) can be used.
769 $(KALLSYMS): scripts ;
771 # Generate some data for debugging strange kallsyms problems
772 debug_kallsyms: .tmp_map$(last_kallsyms)
774 .tmp_map%: .tmp_vmlinux% FORCE
775 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
781 endif # ifdef CONFIG_KALLSYMS
783 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
784 # relevant sections renamed as per the linker script.
785 quiet_cmd_vmlinux-modpost = LD $@
786 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
787 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
788 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
789 define rule_vmlinux-modpost
791 +$(call cmd,vmlinux-modpost)
792 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
793 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
796 # vmlinux image - including updated kernel symbols
797 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
798 ifdef CONFIG_HEADERS_CHECK
799 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
802 $(Q)$(MAKE) $(build)=samples
804 $(call vmlinux-modpost)
805 $(call if_changed_rule,vmlinux__)
806 $(Q)rm -f .old_version
808 vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
809 $(call if_changed_rule,vmlinux-modpost)
811 # The actual objects are generated when descending,
812 # make sure no implicit rule kicks in
813 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
815 # Handle descending into subdirectories listed in $(vmlinux-dirs)
816 # Preset locale variables to speed up the build process. Limit locale
817 # tweaks to this spot to avoid wrong language settings when running
818 # make menuconfig etc.
819 # Error messages still appears in the original language
821 PHONY += $(vmlinux-dirs)
822 $(vmlinux-dirs): prepare scripts
823 $(Q)$(MAKE) $(build)=$@
825 # Build the kernel release string
827 # The KERNELRELEASE value built here is stored in the file
828 # include/config/kernel.release, and is used when executing several
829 # make targets, such as "make install" or "make modules_install."
831 # The eventual kernel release string consists of the following fields,
832 # shown in a hierarchical format to show how smaller parts are concatenated
833 # to form the larger and final value, with values coming from places like
834 # the Makefile, kernel config options, make command line options and/or
835 # SCM tag information.
839 # $(PATCHLEVEL) eg, 6
841 # $(EXTRAVERSION) eg, -rc6
844 # localversion* (files without backups, containing '~')
845 # $(CONFIG_LOCALVERSION) (from kernel config setting)
846 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
847 # ./scripts/setlocalversion (SCM tag, if one exists)
848 # $(LOCALVERSION) (from make command line if provided)
850 # Note how the final $(localver-auto) string is included *only* if the
851 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
852 # moment, only git is supported but other SCMs can edit the script
853 # scripts/setlocalversion and add the appropriate checks as needed.
855 pattern = ".*/localversion[^~]*"
856 string = $(shell cat /dev/null \
857 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
859 localver = $(subst $(space),, $(string) \
860 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
862 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
863 # and if the SCM is know a tag from the SCM is appended.
864 # The appended tag is determined by the SCM used.
866 # Currently, only git is supported.
867 # Other SCMs can edit scripts/setlocalversion and add the appropriate
869 ifdef CONFIG_LOCALVERSION_AUTO
870 _localver-auto = $(shell $(CONFIG_SHELL) \
871 $(srctree)/scripts/setlocalversion $(srctree))
872 localver-auto = $(LOCALVERSION)$(_localver-auto)
875 localver-full = $(localver)$(localver-auto)
877 # Store (new) KERNELRELASE string in include/config/kernel.release
878 kernelrelease = $(KERNELVERSION)$(localver-full)
879 include/config/kernel.release: include/config/auto.conf FORCE
881 $(Q)echo $(kernelrelease) > $@
884 # Things we need to do before we recursively start building the kernel
885 # or the modules are listed in "prepare".
886 # A multi level approach is used. prepareN is processed before prepareN-1.
887 # archprepare is used in arch Makefiles and when processed asm symlink,
888 # version.h and scripts_basic is processed / created.
890 # Listed in dependency order
891 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
893 # prepare3 is used to check if we are building in a separate output directory,
895 # 1) Check that make has not been executed in the kernel src $(srctree)
896 # 2) Create the include2 directory, used for the second asm symlink
897 prepare3: include/config/kernel.release
898 ifneq ($(KBUILD_SRC),)
899 @echo ' Using $(srctree) as source for kernel'
900 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
901 echo " $(srctree) is not clean, please run 'make mrproper'";\
902 echo " in the '$(srctree)' directory.";\
905 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
906 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
909 # prepare2 creates a makefile if using a separate output directory
910 prepare2: prepare3 outputmakefile
912 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
913 include/asm include/config/auto.conf
916 archprepare: prepare1 scripts_basic
918 prepare0: archprepare FORCE
919 $(Q)$(MAKE) $(build)=.
920 $(Q)$(MAKE) $(build)=. missing-syscalls
922 # All the preparing..
925 # Leave this as default for preprocessing vmlinux.lds.S, which is now
926 # done in arch/$(ARCH)/kernel/Makefile
928 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
930 # The asm symlink changes when $(ARCH) changes.
931 # Detect this and ask user to run make mrproper
934 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
935 if [ -L include/asm ]; then \
936 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
937 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
938 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
942 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
943 if [ ! -d include ]; then \
946 ln -fsn asm-$(SRCARCH) $@; \
949 # Generate some files
950 # ---------------------------------------------------------------------------
952 # KERNELRELEASE can change from a few different places, meaning version.h
953 # needs to be updated, so this check is forced on all builds
956 define filechk_utsrelease.h
957 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
958 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
961 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
964 define filechk_version.h
965 (echo \#define LINUX_VERSION_CODE $(shell \
966 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
967 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
970 include/linux/version.h: $(srctree)/Makefile FORCE
971 $(call filechk,version.h)
973 include/linux/utsrelease.h: include/config/kernel.release FORCE
974 $(call filechk,utsrelease.h)
976 # ---------------------------------------------------------------------------
980 @echo '*** Warning: make $@ is unnecessary now.'
982 # ---------------------------------------------------------------------------
984 INSTALL_HDR_PATH=$(objtree)/usr
985 export INSTALL_HDR_PATH
987 HDRFILTER=generic i386 x86_64
988 HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
990 PHONY += headers_install_all
991 headers_install_all: include/linux/version.h scripts_basic FORCE
992 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
993 $(Q)for arch in $(HDRARCHES); do \
994 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
997 PHONY += headers_install
998 headers_install: include/linux/version.h scripts_basic FORCE
999 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1000 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
1002 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1003 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
1005 PHONY += headers_check_all
1006 headers_check_all: headers_install_all
1007 $(Q)for arch in $(HDRARCHES); do \
1008 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1011 PHONY += headers_check
1012 headers_check: headers_install
1013 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
1015 # ---------------------------------------------------------------------------
1018 ifdef CONFIG_MODULES
1020 # By default, build modules as well
1027 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1028 @echo ' Building modules, stage 2.';
1029 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1032 # Target to prepare building external modules
1033 PHONY += modules_prepare
1034 modules_prepare: prepare scripts
1036 # Target to install modules
1037 PHONY += modules_install
1038 modules_install: _modinst_ _modinst_post
1042 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1043 echo "Warning: you may need to install module-init-tools"; \
1044 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1047 @rm -rf $(MODLIB)/kernel
1048 @rm -f $(MODLIB)/source
1049 @mkdir -p $(MODLIB)/kernel
1050 @ln -s $(srctree) $(MODLIB)/source
1051 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1052 rm -f $(MODLIB)/build ; \
1053 ln -s $(objtree) $(MODLIB)/build ; \
1055 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1057 # This depmod is only for convenience to give the initial
1058 # boot a modules.dep even before / is mounted read-write. However the
1059 # boot script depmod is the master version.
1060 PHONY += _modinst_post
1061 _modinst_post: _modinst_
1064 else # CONFIG_MODULES
1066 # Modules not configured
1067 # ---------------------------------------------------------------------------
1069 modules modules_install: FORCE
1071 @echo "The present kernel configuration has modules disabled."
1072 @echo "Type 'make config' and enable loadable module support."
1073 @echo "Then build a kernel with module support enabled."
1077 endif # CONFIG_MODULES
1080 # Cleaning is done on three levels.
1081 # make clean Delete most generated files
1082 # Leave enough to build external modules
1083 # make mrproper Delete the current configuration, and all generated files
1084 # make distclean Remove editor backup files, patch leftover files and the like
1086 # Directories & files removed with 'make clean'
1087 CLEAN_DIRS += $(MODVERDIR)
1088 CLEAN_FILES += vmlinux System.map \
1089 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1091 # Directories & files removed with 'make mrproper'
1092 MRPROPER_DIRS += include/config include2 usr/include
1093 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1094 include/linux/autoconf.h include/linux/version.h \
1095 include/linux/utsrelease.h \
1096 Module.symvers tags TAGS cscope*
1098 # clean - Delete most, but leave enough to build external modules
1100 clean: rm-dirs := $(CLEAN_DIRS)
1101 clean: rm-files := $(CLEAN_FILES)
1102 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1104 PHONY += $(clean-dirs) clean archclean
1106 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1108 clean: archclean $(clean-dirs)
1111 @find . $(RCS_FIND_IGNORE) \
1112 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1113 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1114 -o -name '*.symtypes' \) \
1115 -type f -print | xargs rm -f
1117 # mrproper - Delete all generated files, including .config
1119 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1120 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1121 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1123 PHONY += $(mrproper-dirs) mrproper archmrproper
1125 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1127 mrproper: clean archmrproper $(mrproper-dirs)
1136 @find $(srctree) $(RCS_FIND_IGNORE) \
1137 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1138 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1139 -o -name '.*.rej' -o -size 0 \
1140 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1141 -type f -print | xargs rm -f
1144 # Packaging of the kernel to various formats
1145 # ---------------------------------------------------------------------------
1146 # rpm target kept for backward compatibility
1147 package-dir := $(srctree)/scripts/package
1149 %pkg: include/config/kernel.release FORCE
1150 $(Q)$(MAKE) $(build)=$(package-dir) $@
1151 rpm: include/config/kernel.release FORCE
1152 $(Q)$(MAKE) $(build)=$(package-dir) $@
1155 # Brief documentation of the typical targets used
1156 # ---------------------------------------------------------------------------
1158 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1159 boards := $(notdir $(boards))
1162 @echo 'Cleaning targets:'
1163 @echo ' clean - Remove most generated files but keep the config and'
1164 @echo ' enough build support to build external modules'
1165 @echo ' mrproper - Remove all generated files + config + various backup files'
1166 @echo ' distclean - mrproper + remove editor backup and patch files'
1168 @echo 'Configuration targets:'
1169 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1171 @echo 'Other generic targets:'
1172 @echo ' all - Build all targets marked with [*]'
1173 @echo '* vmlinux - Build the bare kernel'
1174 @echo '* modules - Build all modules'
1175 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1176 @echo ' dir/ - Build all files in dir and below'
1177 @echo ' dir/file.[ois] - Build specified target only'
1178 @echo ' dir/file.ko - Build module including final link'
1179 @echo ' rpm - Build a kernel as an RPM package'
1180 @echo ' tags/TAGS - Generate tags file for editors'
1181 @echo ' cscope - Generate cscope index'
1182 @echo ' kernelrelease - Output the release version string'
1183 @echo ' kernelversion - Output the version stored in Makefile'
1184 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1185 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1186 echo ' (default: $(INSTALL_HDR_PATH))'; \
1189 @echo 'Static analysers'
1190 @echo ' checkstack - Generate a list of stack hogs'
1191 @echo ' namespacecheck - Name space analysis on compiled kernel'
1192 @echo ' export_report - List the usages of all exported symbols'
1193 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1194 echo ' headers_check - Sanity check on exported headers'; \
1197 @echo 'Kernel packaging:'
1198 @$(MAKE) $(build)=$(package-dir) help
1200 @echo 'Documentation targets:'
1201 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1203 @echo 'Architecture specific targets ($(ARCH)):'
1204 @$(if $(archhelp),$(archhelp),\
1205 echo ' No architecture specific help defined for $(ARCH)')
1208 $(foreach b, $(boards), \
1209 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1212 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1213 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1214 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1215 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1216 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1218 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1219 @echo 'For further info see the ./README file'
1222 # Documentation targets
1223 # ---------------------------------------------------------------------------
1224 %docs: scripts_basic FORCE
1225 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1227 else # KBUILD_EXTMOD
1230 # External module support.
1231 # When building external modules the kernel used as basis is considered
1232 # read-only, and no consistency checks are made and the make
1233 # system is not used on the basis kernel. If updates are required
1234 # in the basis kernel ordinary make commands (without M=...) must
1237 # The following are the only valid targets when building external
1239 # make M=dir clean Delete all automatically generated files
1240 # make M=dir modules Make all modules in specified dir
1241 # make M=dir Same as 'make M=dir modules'
1242 # make M=dir modules_install
1243 # Install the modules built in the module directory
1244 # Assumes install directory is already created
1246 # We are always building modules
1248 PHONY += crmodverdir
1252 PHONY += $(objtree)/Module.symvers
1253 $(objtree)/Module.symvers:
1254 @test -e $(objtree)/Module.symvers || ( \
1256 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1257 echo " is missing; modules will have no dependencies and modversions."; \
1260 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1261 PHONY += $(module-dirs) modules
1262 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1263 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1265 modules: $(module-dirs)
1266 @echo ' Building modules, stage 2.';
1267 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1269 PHONY += modules_install
1270 modules_install: _emodinst_ _emodinst_post
1272 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1275 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1276 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1278 PHONY += _emodinst_post
1279 _emodinst_post: _emodinst_
1282 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1284 PHONY += $(clean-dirs) clean
1286 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1288 clean: rm-dirs := $(MODVERDIR)
1289 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1290 clean: $(clean-dirs)
1293 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1294 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1295 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1296 -type f -print | xargs rm -f
1299 @echo ' Building external modules.'
1300 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1302 @echo ' modules - default target, build the module(s)'
1303 @echo ' modules_install - install the module'
1304 @echo ' clean - remove generated files in module directory only'
1308 PHONY += prepare scripts
1311 endif # KBUILD_EXTMOD
1313 # Generate tags for editors
1314 # ---------------------------------------------------------------------------
1316 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1317 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1318 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1320 ifeq ($(src),$(obj))
1323 __srctree = $(srctree)/
1326 ifeq ($(ALLSOURCE_ARCHS),)
1328 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1330 ALLINCLUDE_ARCHS := $(SRCARCH)
1333 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1334 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1337 # Take care of arch/x86
1338 ifeq ($(ARCH), $(SRCARCH))
1339 ALLSOURCE_ARCHS := $(ARCH)
1341 ALLSOURCE_ARCHS := $(ARCH) $(SRCARCH)
1345 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1346 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1349 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1351 find $(__srctree)include $(RCS_FIND_IGNORE) \
1352 \( -name config -o -name 'asm-*' \) -prune \
1353 -o -name $1 -print; \
1354 for arch in $(ALLINCLUDE_ARCHS) ; do \
1355 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1358 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1360 find $(__srctree) $(RCS_FIND_IGNORE) \
1361 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1367 $(call find-sources,'*.[chS]')
1370 $(call find-sources,'Kconfig*')
1372 define all-defconfigs
1373 $(call find-sources,'defconfig')
1377 if $1 --version 2>&1 | grep -iq exuberant; then \
1378 $(all-sources) | xargs $1 -a \
1379 -I __initdata,__exitdata,__acquires,__releases \
1380 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1381 --extra=+f --c-kinds=+px \
1382 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1383 $(all-kconfigs) | xargs $1 -a \
1385 --language-force=kconfig \
1386 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1387 $(all-defconfigs) | xargs -r $1 -a \
1388 --langdef=dotconfig \
1389 --language-force=dotconfig \
1390 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1391 elif $1 --version 2>&1 | grep -iq emacs; then \
1392 $(all-sources) | xargs $1 -a; \
1393 $(all-kconfigs) | xargs $1 -a \
1394 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1395 $(all-defconfigs) | xargs -r $1 -a \
1396 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1398 $(all-sources) | xargs $1 -a; \
1402 quiet_cmd_cscope-file = FILELST cscope.files
1403 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1405 quiet_cmd_cscope = MAKE cscope.out
1406 cmd_cscope = cscope -b
1409 $(call cmd,cscope-file)
1412 quiet_cmd_TAGS = MAKE $@
1421 quiet_cmd_tags = MAKE $@
1431 # Scripts to check various things for consistency
1432 # ---------------------------------------------------------------------------
1435 find * $(RCS_FIND_IGNORE) \
1436 -name '*.[hcS]' -type f -print | sort \
1437 | xargs $(PERL) -w scripts/checkincludes.pl
1440 find * $(RCS_FIND_IGNORE) \
1441 -name '*.[hcS]' -type f -print | sort \
1442 | xargs $(PERL) -w scripts/checkversion.pl
1445 $(PERL) $(srctree)/scripts/namespace.pl
1448 $(PERL) $(srctree)/scripts/export_report.pl
1450 endif #ifeq ($(config-targets),1)
1451 endif #ifeq ($(mixed-targets),1)
1453 PHONY += checkstack kernelrelease kernelversion
1455 # UML needs a little special treatment here. It wants to use the host
1456 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1457 # else wants $(ARCH), including people doing cross-builds, which means
1458 # that $(SUBARCH) doesn't work here.
1460 CHECKSTACK_ARCH := $(SUBARCH)
1462 CHECKSTACK_ARCH := $(ARCH)
1465 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1466 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1469 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1470 $(error kernelrelease not valid - run 'make prepare' to update it))
1472 @echo $(KERNELVERSION)
1475 # ---------------------------------------------------------------------------
1476 # Single targets are compatible with:
1477 # - build whith mixed source and output
1478 # - build with separate output dir 'make O=...'
1479 # - external modules
1481 # target-dir => where to store outputfile
1482 # build-dir => directory in kernel source tree to use
1484 ifeq ($(KBUILD_EXTMOD),)
1485 build-dir = $(patsubst %/,%,$(dir $@))
1486 target-dir = $(dir $@)
1488 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1489 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1490 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1493 %.s: %.c prepare scripts FORCE
1494 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1495 %.i: %.c prepare scripts FORCE
1496 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1497 %.o: %.c prepare scripts FORCE
1498 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1499 %.lst: %.c prepare scripts FORCE
1500 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1501 %.s: %.S prepare scripts FORCE
1502 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1503 %.o: %.S prepare scripts FORCE
1504 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1505 %.symtypes: %.c prepare scripts FORCE
1506 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1509 / %/: prepare scripts FORCE
1511 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1512 $(build)=$(build-dir)
1513 %.ko: prepare scripts FORCE
1515 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1516 $(build)=$(build-dir) $(@:.ko=.o)
1517 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1519 # FIXME Should go into a make.lib or something
1520 # ===========================================================================
1522 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1523 cmd_rmdirs = rm -rf $(rm-dirs)
1525 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1526 cmd_rmfiles = rm -f $(rm-files)
1528 # Run depmod only is we have System.map and depmod is executable
1529 # and we build for the host arch
1530 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1532 if [ -r System.map -a -x $(DEPMOD) ]; then \
1533 $(DEPMOD) -ae -F System.map \
1534 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1538 # Create temporary dir for module support files
1539 # clean it up only when building all modules
1540 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1541 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1543 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1544 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1545 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1547 quiet_cmd_as_o_S = AS $@
1548 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1550 # read all saved command lines
1552 targets := $(wildcard $(sort $(targets)))
1553 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1555 ifneq ($(cmd_files),)
1556 $(cmd_files): ; # Do not try to update included dependency files
1557 include $(cmd_files)
1560 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1562 # $(Q)$(MAKE) $(clean)=dir
1563 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1565 endif # skip-makefile
1570 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1573 # Declare the contents of the .PHONY variable as phony. We keep that
1574 # information in a variable se we can use it in if_changed and friends.