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 # Add custom flags here to avoid conflict with updates
20 EXTRAVERSION := $(EXTRAVERSION)-omap1
22 # We are using a recursive build, so we need to do a little thinking
23 # to get the ordering right.
25 # Most importantly: sub-Makefiles should only ever modify files in
26 # their own directory. If in some directory we have a dependency on
27 # a file in another dir (which doesn't happen often, but it's often
28 # unavoidable when linking the built-in.o targets which finally
29 # turn into vmlinux), we will call a sub make in that other dir, and
30 # after that we are sure that everything which is in that other dir
33 # The only cases where we need to modify files which have global
34 # effects are thus separated out and done before the recursive
35 # descending is started. They are now explicitly listed as the
38 # To put more focus on warnings, be less verbose as default
39 # Use 'make V=1' to see the full commands
42 ifeq ("$(origin V)", "command line")
50 # Call a source code checker (by default, "sparse") as part of the
53 # Use 'make C=1' to enable checking of only re-compiled files.
54 # Use 'make C=2' to enable checking of *all* source files, regardless
55 # of whether they are re-compiled or not.
57 # See the file "Documentation/sparse.txt" for more details, including
58 # where to get the "sparse" utility.
61 ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC = $(C)
65 ifndef KBUILD_CHECKSRC
69 # Use make M=dir to specify directory of external module to build
70 # Old syntax make ... SUBDIRS=$PWD is still supported
71 # Setting the environment variable KBUILD_EXTMOD take precedence
73 KBUILD_EXTMOD ?= $(SUBDIRS)
76 ifeq ("$(origin M)", "command line")
82 # kbuild supports saving output files in a separate directory.
83 # To locate output files in a separate directory two syntaxes are supported.
84 # In both cases the working directory must be the root of the kernel src.
86 # Use "make O=dir/to/store/output/files/"
88 # 2) Set KBUILD_OUTPUT
89 # Set the environment variable KBUILD_OUTPUT to point to the directory
90 # where the output files shall be placed.
91 # export KBUILD_OUTPUT=dir/to/store/output/files/
94 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
98 # KBUILD_SRC is set on invocation of make in OBJ directory
99 # KBUILD_SRC is not intended to be used by the regular user (for now)
100 ifeq ($(KBUILD_SRC),)
102 # OK, Make called in directory where kernel src resides
103 # Do we want to locate output files in a separate directory?
105 ifeq ("$(origin O)", "command line")
106 KBUILD_OUTPUT := $(O)
110 # That's our default target when none is given on the command line
114 ifneq ($(KBUILD_OUTPUT),)
115 # Invoke a second make in the output directory, passing relevant variables
116 # check that the output directory actually exists
117 saved-output := $(KBUILD_OUTPUT)
118 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119 $(if $(KBUILD_OUTPUT),, \
120 $(error output directory "$(saved-output)" does not exist))
121 # Check that OUTPUT directory is not the same as where we have kernel src
122 $(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \
123 $(error Output directory (O=...) specifies kernel src dir))
125 PHONY += $(MAKECMDGOALS) sub-make
127 $(filter-out _all sub-make,$(MAKECMDGOALS)) _all: sub-make
131 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
132 KBUILD_SRC=$(CURDIR) \
133 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
134 $(filter-out _all sub-make,$(MAKECMDGOALS))
136 # Leave processing to above invocation of make
138 endif # ifneq ($(KBUILD_OUTPUT),)
139 endif # ifeq ($(KBUILD_SRC),)
141 # We process the rest of the Makefile if this is the final invocation of make
142 ifeq ($(skip-makefile),)
144 # If building an external module we do not care about the all: rule
145 # but instead _all depend on modules
147 ifeq ($(KBUILD_EXTMOD),)
153 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
155 # FIXME - TOPDIR is obsolete, use srctree/objtree
160 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
162 export srctree objtree VPATH TOPDIR
165 # SUBARCH tells the usermode build what the underlying arch is. That is set
166 # first, and if a usermode build is happening, the "ARCH=um" on the command
167 # line overrides the setting of ARCH below. If a native build is happening,
168 # then ARCH is assigned, getting whatever value it gets normally, and
169 # SUBARCH is subsequently ignored.
171 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
172 -e s/arm.*/arm/ -e s/sa110/arm/ \
173 -e s/s390x/s390/ -e s/parisc64/parisc/ \
174 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
178 # Cross compiling and selecting different set of gcc/bin-utils
179 # ---------------------------------------------------------------------------
181 # When performing cross compilation for other architectures ARCH shall be set
182 # to the target architecture. (See arch/* for the possibilities).
183 # ARCH can be set during invocation of make:
185 # Another way is to have ARCH set in the environment.
186 # The default ARCH is the host where make is executed.
188 # CROSS_COMPILE specify the prefix used for all executables used
189 # during compilation. Only gcc and related bin-utils executables
190 # are prefixed with $(CROSS_COMPILE).
191 # CROSS_COMPILE can be set on the command line
192 # make CROSS_COMPILE=ia64-linux-
193 # Alternatively CROSS_COMPILE can be set in the environment.
194 # Default value for CROSS_COMPILE is not to prefix executables
195 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
198 CROSS_COMPILE ?= arm-linux-
200 # Architecture as present in compile.h
201 UTS_MACHINE := $(ARCH)
204 KCONFIG_CONFIG ?= .config
206 # SHELL used by kbuild
207 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
208 else if [ -x /bin/bash ]; then echo /bin/bash; \
209 else echo sh; fi ; fi)
213 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
216 # Decide whether to build built-in, modular, or both.
217 # Normally, just do built-in.
222 # If we have only "make modules", don't compile built-in objects.
223 # When we're building modules with modversions, we need to consider
224 # the built-in objects during the descend as well, in order to
225 # make sure the checksums are up to date before we record them.
227 ifeq ($(MAKECMDGOALS),modules)
228 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
231 # If we have "make <whatever> modules", compile modules
232 # in addition to whatever we do anyway.
233 # Just "make" or "make all" shall build modules as well
235 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
239 ifeq ($(MAKECMDGOALS),)
243 export KBUILD_MODULES KBUILD_BUILTIN
244 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
247 # ---------------------------------------------------------------------------
249 # Normally, we echo the whole command before executing it. By making
250 # that echo $($(quiet)$(cmd)), we now have the possibility to set
251 # $(quiet) to choose other forms of output instead, e.g.
253 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
254 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
256 # If $(quiet) is empty, the whole command will be printed.
257 # If it is set to "quiet_", only the short version will be printed.
258 # If it is set to "silent_", nothing will be printed at all, since
259 # the variable $(silent_cmd_cc_o_c) doesn't exist.
261 # A simple variant is to prefix commands with $(Q) - that's useful
262 # for commands that shall be hidden in non-verbose mode.
266 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
267 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
269 ifeq ($(KBUILD_VERBOSE),1)
277 # If the user is running make -s (silent mode), suppress echoing of
280 ifneq ($(findstring s,$(MAKEFLAGS)),)
284 export quiet Q KBUILD_VERBOSE
287 # Look for make include files relative to root of kernel src
288 MAKEFLAGS += --include-dir=$(srctree)
290 # We need some generic definitions.
291 include $(srctree)/scripts/Kbuild.include
293 # Make variables (CC, etc...)
295 AS = $(CROSS_COMPILE)as
296 LD = $(CROSS_COMPILE)ld
297 CC = $(CROSS_COMPILE)gcc
299 AR = $(CROSS_COMPILE)ar
300 NM = $(CROSS_COMPILE)nm
301 STRIP = $(CROSS_COMPILE)strip
302 OBJCOPY = $(CROSS_COMPILE)objcopy
303 OBJDUMP = $(CROSS_COMPILE)objdump
305 GENKSYMS = scripts/genksyms/genksyms
306 DEPMOD = /sbin/depmod
307 KALLSYMS = scripts/kallsyms
311 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
313 CFLAGS_MODULE = $(MODFLAGS)
314 AFLAGS_MODULE = $(MODFLAGS)
320 # Use LINUXINCLUDE when you must reference the include/ directory.
321 # Needed to be compatible with the O= option
322 LINUXINCLUDE := -Iinclude \
323 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
324 -include include/linux/autoconf.h
326 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
328 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
329 -fno-strict-aliasing -fno-common \
330 -Werror-implicit-function-declaration
331 KBUILD_AFLAGS := -D__ASSEMBLY__
333 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
334 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
335 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
337 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
338 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
339 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
340 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
342 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
343 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
344 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
346 # When compiling out-of-tree modules, put MODVERDIR in the module
347 # tree rather than in the kernel tree. The kernel tree might
349 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
351 # Files to ignore in find ... statements
353 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
354 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
356 # ===========================================================================
357 # Rules shared between *config targets and build targets
359 # Basic helpers built in scripts/
360 PHONY += scripts_basic
362 $(Q)$(MAKE) $(build)=scripts/basic
364 # To avoid any implicit rule to kick in, define an empty command.
365 scripts/basic/%: scripts_basic ;
367 PHONY += outputmakefile
368 # outputmakefile generates a Makefile in the output directory, if using a
369 # separate output directory. This allows convenient use of make in the
372 ifneq ($(KBUILD_SRC),)
373 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
374 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
377 # To make sure we do not include .config for any of the *config targets
378 # catch them early, and hand them over to scripts/kconfig/Makefile
379 # It is allowed to specify more targets when calling make, including
380 # mixing *config targets and build targets.
381 # For example 'make oldconfig all'.
382 # Detect when mixed targets is specified, and make a second invocation
383 # of make so .config is not included in this case either (for *config).
385 no-dot-config-targets := clean mrproper distclean \
386 cscope TAGS tags help %docs check% \
387 include/linux/version.h headers_% \
388 kernelrelease kernelversion
394 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
395 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
400 ifeq ($(KBUILD_EXTMOD),)
401 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
403 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
409 ifeq ($(mixed-targets),1)
410 # ===========================================================================
411 # We're called with mixed targets (*config and build targets).
412 # Handle them one by one.
415 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
418 ifeq ($(config-targets),1)
419 # ===========================================================================
420 # *config targets only - make sure prerequisites are updated, and descend
421 # in scripts/kconfig to make the *config target
423 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
424 # KBUILD_DEFCONFIG may point out an alternative default configuration
425 # used for 'make defconfig'
426 include $(srctree)/arch/$(ARCH)/Makefile
427 export KBUILD_DEFCONFIG
429 config %config: scripts_basic outputmakefile FORCE
430 $(Q)mkdir -p include/linux include/config
431 $(Q)$(MAKE) $(build)=scripts/kconfig $@
434 # ===========================================================================
435 # Build targets only - this includes vmlinux, arch specific targets, clean
436 # targets and others. In general all targets except *config targets.
438 ifeq ($(KBUILD_EXTMOD),)
439 # Additional helpers built in scripts/
440 # Carefully list dependencies so we do not try to build scripts twice
443 scripts: scripts_basic include/config/auto.conf
444 $(Q)$(MAKE) $(build)=$(@)
446 # Objects we will link into vmlinux / subdirs we need to visit
448 drivers-y := drivers/ sound/
452 endif # KBUILD_EXTMOD
454 ifeq ($(dot-config),1)
456 -include include/config/auto.conf
458 ifeq ($(KBUILD_EXTMOD),)
459 # Read in dependencies to all Kconfig* files, make sure to run
460 # oldconfig if changes are detected.
461 -include include/config/auto.conf.cmd
463 # To avoid any implicit rule to kick in, define an empty command
464 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
466 # If .config is newer than include/config/auto.conf, someone tinkered
467 # with it and forgot to run make oldconfig.
468 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
469 # we execute the config step to be sure to catch updated Kconfig files
470 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
471 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
473 # external modules needs include/linux/autoconf.h and include/config/auto.conf
474 # but do not care if they are up-to-date. Use auto.conf to trigger the test
475 PHONY += include/config/auto.conf
477 include/config/auto.conf:
478 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
480 echo " ERROR: Kernel configuration is invalid."; \
481 echo " include/linux/autoconf.h or $@ are missing."; \
482 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
486 endif # KBUILD_EXTMOD
489 # Dummy target needed, because used as prerequisite
490 include/config/auto.conf: ;
491 endif # $(dot-config)
493 # The all: target is the default when no target is given on the
495 # This allow a user to issue only 'make' to build a kernel including modules
496 # Defaults vmlinux but it is usually overridden in the arch makefile
499 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
505 include $(srctree)/arch/$(ARCH)/Makefile
507 ifdef CONFIG_FRAME_POINTER
508 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
510 KBUILD_CFLAGS += -fomit-frame-pointer
513 ifdef CONFIG_DEBUG_INFO
515 KBUILD_AFLAGS += -gdwarf-2
518 # Force gcc to behave correct even for buggy distributions
519 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
521 # arch Makefile may override CC so keep this after arch Makefile is included
522 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
523 CHECKFLAGS += $(NOSTDINC_FLAGS)
525 # warn about C99 declaration after statement
526 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
528 # disable pointer signed / unsigned warnings in gcc 4.0
529 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
531 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
532 KBUILD_CPPFLAGS += $(CPPFLAGS)
533 KBUILD_AFLAGS += $(AFLAGS)
534 KBUILD_CFLAGS += $(CFLAGS)
536 # Use --build-id when available.
537 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
538 $(call ld-option, -Wl$(comma)--build-id,))
539 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
540 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
542 # Default kernel image to build when no specific target is given.
543 # KBUILD_IMAGE may be overruled on the command line or
544 # set in the environment
545 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
547 export KBUILD_IMAGE ?= vmlinux
550 # INSTALL_PATH specifies where to place the updated kernel and system map
551 # images. Default is /boot, but you can set it to other values
552 export INSTALL_PATH ?= /boot
555 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
556 # relocations required by build roots. This is not defined in the
557 # makefile but the argument can be passed to make if needed.
560 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
564 # INSTALL_MOD_STRIP, if defined, will cause modules to be
565 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
566 # the default option --strip-debug will be used. Otherwise,
567 # INSTALL_MOD_STRIP will used as the options to the strip command.
569 ifdef INSTALL_MOD_STRIP
570 ifeq ($(INSTALL_MOD_STRIP),1)
571 mod_strip_cmd = $(STRIP) --strip-debug
573 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
574 endif # INSTALL_MOD_STRIP=1
577 endif # INSTALL_MOD_STRIP
581 ifeq ($(KBUILD_EXTMOD),)
582 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
584 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
585 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
586 $(net-y) $(net-m) $(libs-y) $(libs-m)))
588 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
590 $(core-n) $(core-) $(drivers-n) $(drivers-) \
591 $(net-n) $(net-) $(libs-n) $(libs-))))
593 init-y := $(patsubst %/, %/built-in.o, $(init-y))
594 core-y := $(patsubst %/, %/built-in.o, $(core-y))
595 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
596 net-y := $(patsubst %/, %/built-in.o, $(net-y))
597 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
598 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
599 libs-y := $(libs-y1) $(libs-y2)
602 # ---------------------------------------------------------------------------
603 # vmlinux is built from the objects selected by $(vmlinux-init) and
604 # $(vmlinux-main). Most are built-in.o files from top-level directories
605 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
606 # Ordering when linking is important, and $(vmlinux-init) must be first.
611 # +-< $(vmlinux-init)
612 # | +--< init/version.o + more
614 # +--< $(vmlinux-main)
615 # | +--< driver/built-in.o mm/built-in.o + more
617 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
619 # vmlinux version (uname -v) cannot be updated during normal
620 # descending-into-subdirs phase since we do not yet know if we need to
622 # Therefore this step is delayed until just before final link of vmlinux -
623 # except in the kallsyms case where it is done just before adding the
624 # symbols to the kernel.
626 # System.map is generated to document addresses of all kernel symbols
628 vmlinux-init := $(head-y) $(init-y)
629 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
630 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
631 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
632 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
634 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
635 # May be overridden by arch/$(ARCH)/Makefile
636 quiet_cmd_vmlinux__ ?= LD $@
637 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
638 -T $(vmlinux-lds) $(vmlinux-init) \
639 --start-group $(vmlinux-main) --end-group \
640 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
642 # Generate new vmlinux version
643 quiet_cmd_vmlinux_version = GEN .version
644 cmd_vmlinux_version = set -e; \
645 if [ ! -r .version ]; then \
649 mv .version .old_version; \
650 expr 0$$(cat .old_version) + 1 >.version; \
652 $(MAKE) $(build)=init
654 # Generate System.map
655 quiet_cmd_sysmap = SYSMAP
656 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
659 # If CONFIG_KALLSYMS is set .version is already updated
660 # Generate System.map and verify that the content is consistent
661 # Use + in front of the vmlinux_version rule to silent warning with make -j2
662 # First command is ':' to allow us to use + in front of the rule
663 define rule_vmlinux__
665 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
667 $(call cmd,vmlinux__)
668 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
670 $(Q)$(if $($(quiet)cmd_sysmap), \
671 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
672 $(cmd_sysmap) $@ System.map; \
673 if [ $$? -ne 0 ]; then \
681 ifdef CONFIG_KALLSYMS
682 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
683 # It's a three stage process:
684 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
686 # Running kallsyms on that gives us .tmp_kallsyms1.o with
687 # the right size - vmlinux version (uname -v) is updated during this step
688 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
689 # but due to the added section, some addresses have shifted.
690 # From here, we generate a correct .tmp_kallsyms2.o
691 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
692 # o Verify that the System.map from vmlinux matches the map from
693 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
694 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
695 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
696 # temporary bypass to allow the kernel to be built while the
697 # maintainers work out what went wrong with kallsyms.
699 ifdef CONFIG_KALLSYMS_EXTRA_PASS
705 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
707 define verify_kallsyms
708 $(Q)$(if $($(quiet)cmd_sysmap), \
709 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
710 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
711 $(Q)cmp -s System.map .tmp_System.map || \
712 (echo Inconsistent kallsyms data; \
713 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
714 rm .tmp_kallsyms* ; /bin/false )
717 # Update vmlinux version before link
718 # Use + in front of this rule to silent warning about make -j1
719 # First command is ':' to allow us to use + in front of this rule
720 cmd_ksym_ld = $(cmd_vmlinux__)
723 +$(call cmd,vmlinux_version)
724 $(call cmd,vmlinux__)
725 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
728 # Generate .S file with all kernel symbols
729 quiet_cmd_kallsyms = KSYM $@
730 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
731 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
733 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
734 $(call if_changed_dep,as_o_S)
736 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
739 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
740 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
741 $(call if_changed_rule,ksym_ld)
743 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
744 $(call if_changed,vmlinux__)
746 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
747 $(call if_changed,vmlinux__)
749 # Needs to visit scripts/ before $(KALLSYMS) can be used.
750 $(KALLSYMS): scripts ;
752 # Generate some data for debugging strange kallsyms problems
753 debug_kallsyms: .tmp_map$(last_kallsyms)
755 .tmp_map%: .tmp_vmlinux% FORCE
756 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
762 endif # ifdef CONFIG_KALLSYMS
764 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
765 # relevant sections renamed as per the linker script.
766 quiet_cmd_vmlinux-modpost = LD $@
767 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
768 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
769 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
770 define rule_vmlinux-modpost
772 +$(call cmd,vmlinux-modpost)
773 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
774 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
777 # vmlinux image - including updated kernel symbols
778 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
779 ifdef CONFIG_HEADERS_CHECK
780 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
783 $(Q)$(MAKE) $(build)=samples
785 $(call vmlinux-modpost)
786 $(call if_changed_rule,vmlinux__)
787 $(Q)rm -f .old_version
789 vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
790 $(call if_changed_rule,vmlinux-modpost)
792 # The actual objects are generated when descending,
793 # make sure no implicit rule kicks in
794 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
796 # Handle descending into subdirectories listed in $(vmlinux-dirs)
797 # Preset locale variables to speed up the build process. Limit locale
798 # tweaks to this spot to avoid wrong language settings when running
799 # make menuconfig etc.
800 # Error messages still appears in the original language
802 PHONY += $(vmlinux-dirs)
803 $(vmlinux-dirs): prepare scripts
804 $(Q)$(MAKE) $(build)=$@
806 # Build the kernel release string
808 # The KERNELRELEASE value built here is stored in the file
809 # include/config/kernel.release, and is used when executing several
810 # make targets, such as "make install" or "make modules_install."
812 # The eventual kernel release string consists of the following fields,
813 # shown in a hierarchical format to show how smaller parts are concatenated
814 # to form the larger and final value, with values coming from places like
815 # the Makefile, kernel config options, make command line options and/or
816 # SCM tag information.
820 # $(PATCHLEVEL) eg, 6
822 # $(EXTRAVERSION) eg, -rc6
825 # localversion* (files without backups, containing '~')
826 # $(CONFIG_LOCALVERSION) (from kernel config setting)
827 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
828 # ./scripts/setlocalversion (SCM tag, if one exists)
829 # $(LOCALVERSION) (from make command line if provided)
831 # Note how the final $(localver-auto) string is included *only* if the
832 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
833 # moment, only git is supported but other SCMs can edit the script
834 # scripts/setlocalversion and add the appropriate checks as needed.
836 pattern = ".*/localversion[^~]*"
837 string = $(shell cat /dev/null \
838 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
840 localver = $(subst $(space),, $(string) \
841 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
843 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
844 # and if the SCM is know a tag from the SCM is appended.
845 # The appended tag is determined by the SCM used.
847 # Currently, only git is supported.
848 # Other SCMs can edit scripts/setlocalversion and add the appropriate
850 ifdef CONFIG_LOCALVERSION_AUTO
851 _localver-auto = $(shell $(CONFIG_SHELL) \
852 $(srctree)/scripts/setlocalversion $(srctree))
853 localver-auto = $(LOCALVERSION)$(_localver-auto)
856 localver-full = $(localver)$(localver-auto)
858 # Store (new) KERNELRELASE string in include/config/kernel.release
859 kernelrelease = $(KERNELVERSION)$(localver-full)
860 include/config/kernel.release: include/config/auto.conf FORCE
862 $(Q)echo $(kernelrelease) > $@
865 # Things we need to do before we recursively start building the kernel
866 # or the modules are listed in "prepare".
867 # A multi level approach is used. prepareN is processed before prepareN-1.
868 # archprepare is used in arch Makefiles and when processed asm symlink,
869 # version.h and scripts_basic is processed / created.
871 # Listed in dependency order
872 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
874 # prepare3 is used to check if we are building in a separate output directory,
876 # 1) Check that make has not been executed in the kernel src $(srctree)
877 # 2) Create the include2 directory, used for the second asm symlink
878 prepare3: include/config/kernel.release
879 ifneq ($(KBUILD_SRC),)
880 @echo ' Using $(srctree) as source for kernel'
881 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
882 echo " $(srctree) is not clean, please run 'make mrproper'";\
883 echo " in the '$(srctree)' directory.";\
886 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
887 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
890 # prepare2 creates a makefile if using a separate output directory
891 prepare2: prepare3 outputmakefile
893 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
894 include/asm include/config/auto.conf
897 archprepare: prepare1 scripts_basic
899 prepare0: archprepare FORCE
900 $(Q)$(MAKE) $(build)=.
901 $(Q)$(MAKE) $(build)=. missing-syscalls
903 # All the preparing..
906 # Leave this as default for preprocessing vmlinux.lds.S, which is now
907 # done in arch/$(ARCH)/kernel/Makefile
909 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
911 # The asm symlink changes when $(ARCH) changes.
912 # Detect this and ask user to run make mrproper
915 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
916 if [ -L include/asm ]; then \
917 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
918 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
919 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
923 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
924 if [ ! -d include ]; then \
927 ln -fsn asm-$(SRCARCH) $@; \
930 # Generate some files
931 # ---------------------------------------------------------------------------
933 # KERNELRELEASE can change from a few different places, meaning version.h
934 # needs to be updated, so this check is forced on all builds
937 define filechk_utsrelease.h
938 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
939 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
942 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
945 define filechk_version.h
946 (echo \#define LINUX_VERSION_CODE $(shell \
947 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
948 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
951 include/linux/version.h: $(srctree)/Makefile FORCE
952 $(call filechk,version.h)
954 include/linux/utsrelease.h: include/config/kernel.release FORCE
955 $(call filechk,utsrelease.h)
957 # ---------------------------------------------------------------------------
961 @echo '*** Warning: make $@ is unnecessary now.'
963 # ---------------------------------------------------------------------------
965 INSTALL_HDR_PATH=$(objtree)/usr
966 export INSTALL_HDR_PATH
968 HDRFILTER=generic i386 x86_64
969 HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
971 PHONY += headers_install_all
972 headers_install_all: include/linux/version.h scripts_basic FORCE
973 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
974 $(Q)for arch in $(HDRARCHES); do \
975 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
978 PHONY += headers_install
979 headers_install: include/linux/version.h scripts_basic FORCE
980 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
981 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
983 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
984 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
986 PHONY += headers_check_all
987 headers_check_all: headers_install_all
988 $(Q)for arch in $(HDRARCHES); do \
989 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
992 PHONY += headers_check
993 headers_check: headers_install
994 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
996 # ---------------------------------------------------------------------------
1001 # By default, build modules as well
1008 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1009 @echo ' Building modules, stage 2.';
1010 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1013 # Target to prepare building external modules
1014 PHONY += modules_prepare
1015 modules_prepare: prepare scripts
1017 # Target to install modules
1018 PHONY += modules_install
1019 modules_install: _modinst_ _modinst_post
1023 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1024 echo "Warning: you may need to install module-init-tools"; \
1025 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1028 @rm -rf $(MODLIB)/kernel
1029 @rm -f $(MODLIB)/source
1030 @mkdir -p $(MODLIB)/kernel
1031 @ln -s $(srctree) $(MODLIB)/source
1032 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1033 rm -f $(MODLIB)/build ; \
1034 ln -s $(objtree) $(MODLIB)/build ; \
1036 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1038 # This depmod is only for convenience to give the initial
1039 # boot a modules.dep even before / is mounted read-write. However the
1040 # boot script depmod is the master version.
1041 PHONY += _modinst_post
1042 _modinst_post: _modinst_
1045 else # CONFIG_MODULES
1047 # Modules not configured
1048 # ---------------------------------------------------------------------------
1050 modules modules_install: FORCE
1052 @echo "The present kernel configuration has modules disabled."
1053 @echo "Type 'make config' and enable loadable module support."
1054 @echo "Then build a kernel with module support enabled."
1058 endif # CONFIG_MODULES
1061 # Cleaning is done on three levels.
1062 # make clean Delete most generated files
1063 # Leave enough to build external modules
1064 # make mrproper Delete the current configuration, and all generated files
1065 # make distclean Remove editor backup files, patch leftover files and the like
1067 # Directories & files removed with 'make clean'
1068 CLEAN_DIRS += $(MODVERDIR)
1069 CLEAN_FILES += vmlinux System.map \
1070 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1072 # Directories & files removed with 'make mrproper'
1073 MRPROPER_DIRS += include/config include2 usr/include
1074 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1075 include/linux/autoconf.h include/linux/version.h \
1076 include/linux/utsrelease.h \
1077 Module.symvers tags TAGS cscope*
1079 # clean - Delete most, but leave enough to build external modules
1081 clean: rm-dirs := $(CLEAN_DIRS)
1082 clean: rm-files := $(CLEAN_FILES)
1083 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1085 PHONY += $(clean-dirs) clean archclean
1087 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1089 clean: archclean $(clean-dirs)
1092 @find . $(RCS_FIND_IGNORE) \
1093 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1094 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1095 -o -name '*.symtypes' \) \
1096 -type f -print | xargs rm -f
1098 # mrproper - Delete all generated files, including .config
1100 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1101 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1102 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1104 PHONY += $(mrproper-dirs) mrproper archmrproper
1106 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1108 mrproper: clean archmrproper $(mrproper-dirs)
1117 @find $(srctree) $(RCS_FIND_IGNORE) \
1118 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1119 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1120 -o -name '.*.rej' -o -size 0 \
1121 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1122 -type f -print | xargs rm -f
1125 # Packaging of the kernel to various formats
1126 # ---------------------------------------------------------------------------
1127 # rpm target kept for backward compatibility
1128 package-dir := $(srctree)/scripts/package
1130 %pkg: include/config/kernel.release FORCE
1131 $(Q)$(MAKE) $(build)=$(package-dir) $@
1132 rpm: include/config/kernel.release FORCE
1133 $(Q)$(MAKE) $(build)=$(package-dir) $@
1136 # Brief documentation of the typical targets used
1137 # ---------------------------------------------------------------------------
1139 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1140 boards := $(notdir $(boards))
1143 @echo 'Cleaning targets:'
1144 @echo ' clean - Remove most generated files but keep the config and'
1145 @echo ' enough build support to build external modules'
1146 @echo ' mrproper - Remove all generated files + config + various backup files'
1147 @echo ' distclean - mrproper + remove editor backup and patch files'
1149 @echo 'Configuration targets:'
1150 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1152 @echo 'Other generic targets:'
1153 @echo ' all - Build all targets marked with [*]'
1154 @echo '* vmlinux - Build the bare kernel'
1155 @echo '* modules - Build all modules'
1156 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1157 @echo ' dir/ - Build all files in dir and below'
1158 @echo ' dir/file.[ois] - Build specified target only'
1159 @echo ' dir/file.ko - Build module including final link'
1160 @echo ' rpm - Build a kernel as an RPM package'
1161 @echo ' tags/TAGS - Generate tags file for editors'
1162 @echo ' cscope - Generate cscope index'
1163 @echo ' kernelrelease - Output the release version string'
1164 @echo ' kernelversion - Output the version stored in Makefile'
1165 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1166 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1167 echo ' (default: $(INSTALL_HDR_PATH))'; \
1170 @echo 'Static analysers'
1171 @echo ' checkstack - Generate a list of stack hogs'
1172 @echo ' namespacecheck - Name space analysis on compiled kernel'
1173 @echo ' export_report - List the usages of all exported symbols'
1174 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1175 echo ' headers_check - Sanity check on exported headers'; \
1178 @echo 'Kernel packaging:'
1179 @$(MAKE) $(build)=$(package-dir) help
1181 @echo 'Documentation targets:'
1182 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1184 @echo 'Architecture specific targets ($(ARCH)):'
1185 @$(if $(archhelp),$(archhelp),\
1186 echo ' No architecture specific help defined for $(ARCH)')
1189 $(foreach b, $(boards), \
1190 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1193 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1194 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1195 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1196 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1197 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1199 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1200 @echo 'For further info see the ./README file'
1203 # Documentation targets
1204 # ---------------------------------------------------------------------------
1205 %docs: scripts_basic FORCE
1206 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1208 else # KBUILD_EXTMOD
1211 # External module support.
1212 # When building external modules the kernel used as basis is considered
1213 # read-only, and no consistency checks are made and the make
1214 # system is not used on the basis kernel. If updates are required
1215 # in the basis kernel ordinary make commands (without M=...) must
1218 # The following are the only valid targets when building external
1220 # make M=dir clean Delete all automatically generated files
1221 # make M=dir modules Make all modules in specified dir
1222 # make M=dir Same as 'make M=dir modules'
1223 # make M=dir modules_install
1224 # Install the modules built in the module directory
1225 # Assumes install directory is already created
1227 # We are always building modules
1229 PHONY += crmodverdir
1233 PHONY += $(objtree)/Module.symvers
1234 $(objtree)/Module.symvers:
1235 @test -e $(objtree)/Module.symvers || ( \
1237 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1238 echo " is missing; modules will have no dependencies and modversions."; \
1241 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1242 PHONY += $(module-dirs) modules
1243 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1244 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1246 modules: $(module-dirs)
1247 @echo ' Building modules, stage 2.';
1248 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1250 PHONY += modules_install
1251 modules_install: _emodinst_ _emodinst_post
1253 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1256 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1257 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1259 PHONY += _emodinst_post
1260 _emodinst_post: _emodinst_
1263 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1265 PHONY += $(clean-dirs) clean
1267 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1269 clean: rm-dirs := $(MODVERDIR)
1270 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1271 clean: $(clean-dirs)
1274 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1275 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1276 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1277 -type f -print | xargs rm -f
1280 @echo ' Building external modules.'
1281 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1283 @echo ' modules - default target, build the module(s)'
1284 @echo ' modules_install - install the module'
1285 @echo ' clean - remove generated files in module directory only'
1289 PHONY += prepare scripts
1292 endif # KBUILD_EXTMOD
1294 # Generate tags for editors
1295 # ---------------------------------------------------------------------------
1297 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1298 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1299 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1301 ifeq ($(src),$(obj))
1304 __srctree = $(srctree)/
1307 ifeq ($(ALLSOURCE_ARCHS),)
1309 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1311 ALLINCLUDE_ARCHS := $(SRCARCH)
1314 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1315 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1318 # Take care of arch/x86
1319 ifeq ($(ARCH), $(SRCARCH))
1320 ALLSOURCE_ARCHS := $(ARCH)
1322 ALLSOURCE_ARCHS := $(ARCH) $(SRCARCH)
1326 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1327 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1330 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1332 find $(__srctree)include $(RCS_FIND_IGNORE) \
1333 \( -name config -o -name 'asm-*' \) -prune \
1334 -o -name $1 -print; \
1335 for arch in $(ALLINCLUDE_ARCHS) ; do \
1336 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1339 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1341 find $(__srctree) $(RCS_FIND_IGNORE) \
1342 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1348 $(call find-sources,'*.[chS]')
1351 $(call find-sources,'Kconfig*')
1353 define all-defconfigs
1354 $(call find-sources,'defconfig')
1358 if $1 --version 2>&1 | grep -iq exuberant; then \
1359 $(all-sources) | xargs $1 -a \
1360 -I __initdata,__exitdata,__acquires,__releases \
1361 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1362 --extra=+f --c-kinds=+px \
1363 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1364 $(all-kconfigs) | xargs $1 -a \
1366 --language-force=kconfig \
1367 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1368 $(all-defconfigs) | xargs -r $1 -a \
1369 --langdef=dotconfig \
1370 --language-force=dotconfig \
1371 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1372 elif $1 --version 2>&1 | grep -iq emacs; then \
1373 $(all-sources) | xargs $1 -a; \
1374 $(all-kconfigs) | xargs $1 -a \
1375 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1376 $(all-defconfigs) | xargs -r $1 -a \
1377 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1379 $(all-sources) | xargs $1 -a; \
1383 quiet_cmd_cscope-file = FILELST cscope.files
1384 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1386 quiet_cmd_cscope = MAKE cscope.out
1387 cmd_cscope = cscope -b
1390 $(call cmd,cscope-file)
1393 quiet_cmd_TAGS = MAKE $@
1402 quiet_cmd_tags = MAKE $@
1412 # Scripts to check various things for consistency
1413 # ---------------------------------------------------------------------------
1416 find * $(RCS_FIND_IGNORE) \
1417 -name '*.[hcS]' -type f -print | sort \
1418 | xargs $(PERL) -w scripts/checkincludes.pl
1421 find * $(RCS_FIND_IGNORE) \
1422 -name '*.[hcS]' -type f -print | sort \
1423 | xargs $(PERL) -w scripts/checkversion.pl
1426 $(PERL) $(srctree)/scripts/namespace.pl
1429 $(PERL) $(srctree)/scripts/export_report.pl
1431 endif #ifeq ($(config-targets),1)
1432 endif #ifeq ($(mixed-targets),1)
1434 PHONY += checkstack kernelrelease kernelversion
1436 # UML needs a little special treatment here. It wants to use the host
1437 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1438 # else wants $(ARCH), including people doing cross-builds, which means
1439 # that $(SUBARCH) doesn't work here.
1441 CHECKSTACK_ARCH := $(SUBARCH)
1443 CHECKSTACK_ARCH := $(ARCH)
1446 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1447 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1450 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1451 $(error kernelrelease not valid - run 'make prepare' to update it))
1453 @echo $(KERNELVERSION)
1456 # ---------------------------------------------------------------------------
1457 # Single targets are compatible with:
1458 # - build whith mixed source and output
1459 # - build with separate output dir 'make O=...'
1460 # - external modules
1462 # target-dir => where to store outputfile
1463 # build-dir => directory in kernel source tree to use
1465 ifeq ($(KBUILD_EXTMOD),)
1466 build-dir = $(patsubst %/,%,$(dir $@))
1467 target-dir = $(dir $@)
1469 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1470 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1471 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1474 %.s: %.c prepare scripts FORCE
1475 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1476 %.i: %.c prepare scripts FORCE
1477 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1478 %.o: %.c prepare scripts FORCE
1479 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1480 %.lst: %.c prepare scripts FORCE
1481 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1482 %.s: %.S prepare scripts FORCE
1483 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1484 %.o: %.S prepare scripts FORCE
1485 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1486 %.symtypes: %.c prepare scripts FORCE
1487 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1490 / %/: prepare scripts FORCE
1492 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1493 $(build)=$(build-dir)
1494 %.ko: prepare scripts FORCE
1496 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1497 $(build)=$(build-dir) $(@:.ko=.o)
1498 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1500 # FIXME Should go into a make.lib or something
1501 # ===========================================================================
1503 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1504 cmd_rmdirs = rm -rf $(rm-dirs)
1506 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1507 cmd_rmfiles = rm -f $(rm-files)
1509 # Run depmod only is we have System.map and depmod is executable
1510 # and we build for the host arch
1511 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1513 if [ -r System.map -a -x $(DEPMOD) ]; then \
1514 $(DEPMOD) -ae -F System.map \
1515 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1519 # Create temporary dir for module support files
1520 # clean it up only when building all modules
1521 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1522 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1524 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1525 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1526 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1528 quiet_cmd_as_o_S = AS $@
1529 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1531 # read all saved command lines
1533 targets := $(wildcard $(sort $(targets)))
1534 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1536 ifneq ($(cmd_files),)
1537 $(cmd_files): ; # Do not try to update included dependency files
1538 include $(cmd_files)
1541 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1543 # $(Q)$(MAKE) $(clean)=dir
1544 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1546 endif # skip-makefile
1551 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1554 # Declare the contents of the .PHONY variable as phony. We keep that
1555 # information in a variable se we can use it in if_changed and friends.