Add wait_event_killable
[linux-2.6/mini2440.git] / Makefile
blob92dc3cb5f43d2e5d8d60b6f4d031397dca0addda
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 24
4 EXTRAVERSION = -rc4
5 NAME = Arr Matey! A Hairy Bilge Rat!
7 # *DOCUMENTATION*
8 # To see a list of typical targets execute "make help"
9 # More info can be located in ./README
10 # Comments in this file are targeted only to the developer, do not
11 # expect to learn how to build the kernel reading this file.
13 # Do not:
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
28 # is now up to date.
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
33 # prepare rule.
35 # To put more focus on warnings, be less verbose as default
36 # Use 'make V=1' to see the full commands
38 ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42 endif
43 ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45 endif
47 # Call a source code checker (by default, "sparse") as part of the
48 # C compilation.
50 # Use 'make C=1' to enable checking of only re-compiled files.
51 # Use 'make C=2' to enable checking of *all* source files, regardless
52 # of whether they are re-compiled or not.
54 # See the file "Documentation/sparse.txt" for more details, including
55 # where to get the "sparse" utility.
57 ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61 endif
62 ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64 endif
66 # Use make M=dir to specify directory of external module to build
67 # Old syntax make ... SUBDIRS=$PWD is still supported
68 # Setting the environment variable KBUILD_EXTMOD take precedence
69 ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71 endif
72 ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76 endif
79 # kbuild supports saving output files in a separate directory.
80 # To locate output files in a separate directory two syntaxes are supported.
81 # In both cases the working directory must be the root of the kernel src.
82 # 1) O=
83 # Use "make O=dir/to/store/output/files/"
85 # 2) Set KBUILD_OUTPUT
86 # Set the environment variable KBUILD_OUTPUT to point to the directory
87 # where the output files shall be placed.
88 # export KBUILD_OUTPUT=dir/to/store/output/files/
89 # make
91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
92 # variable.
95 # KBUILD_SRC is set on invocation of make in OBJ directory
96 # KBUILD_SRC is not intended to be used by the regular user (for now)
97 ifeq ($(KBUILD_SRC),)
99 # OK, Make called in directory where kernel src resides
100 # Do we want to locate output files in a separate directory?
101 ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105 endif
107 # That's our default target when none is given on the command line
108 PHONY := _all
109 _all:
111 ifneq ($(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
125 $(Q)@:
127 sub-make: FORCE
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
134 skip-makefile := 1
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 ($(skip-makefile),)
141 # If building an external module we do not care about the all: rule
142 # but instead _all depend on modules
143 PHONY += all
144 ifeq ($(KBUILD_EXTMOD),)
145 _all: all
146 else
147 _all: modules
148 endif
150 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
151 TOPDIR := $(srctree)
152 # FIXME - TOPDIR is obsolete, use srctree/objtree
153 objtree := $(CURDIR)
154 src := $(srctree)
155 obj := $(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/ \
172 -e s/sh[234].*/sh/ )
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:
180 # make ARCH=ia64
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
193 ARCH ?= $(SUBARCH)
194 CROSS_COMPILE ?=
196 # Architecture as present in compile.h
197 UTS_MACHINE := $(ARCH)
198 SRCARCH := $(ARCH)
200 # Additional ARCH settings for x86
201 ifeq ($(ARCH),i386)
202 SRCARCH := x86
203 endif
204 ifeq ($(ARCH),x86_64)
205 SRCARCH := x86
206 endif
208 KCONFIG_CONFIG ?= .config
210 # SHELL used by kbuild
211 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
212 else if [ -x /bin/bash ]; then echo /bin/bash; \
213 else echo sh; fi ; fi)
215 HOSTCC = gcc
216 HOSTCXX = g++
217 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
218 HOSTCXXFLAGS = -O2
220 # Decide whether to build built-in, modular, or both.
221 # Normally, just do built-in.
223 KBUILD_MODULES :=
224 KBUILD_BUILTIN := 1
226 # If we have only "make modules", don't compile built-in objects.
227 # When we're building modules with modversions, we need to consider
228 # the built-in objects during the descend as well, in order to
229 # make sure the checksums are up to date before we record them.
231 ifeq ($(MAKECMDGOALS),modules)
232 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
233 endif
235 # If we have "make <whatever> modules", compile modules
236 # in addition to whatever we do anyway.
237 # Just "make" or "make all" shall build modules as well
239 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
240 KBUILD_MODULES := 1
241 endif
243 ifeq ($(MAKECMDGOALS),)
244 KBUILD_MODULES := 1
245 endif
247 export KBUILD_MODULES KBUILD_BUILTIN
248 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
250 # Beautify output
251 # ---------------------------------------------------------------------------
253 # Normally, we echo the whole command before executing it. By making
254 # that echo $($(quiet)$(cmd)), we now have the possibility to set
255 # $(quiet) to choose other forms of output instead, e.g.
257 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
258 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
260 # If $(quiet) is empty, the whole command will be printed.
261 # If it is set to "quiet_", only the short version will be printed.
262 # If it is set to "silent_", nothing will be printed at all, since
263 # the variable $(silent_cmd_cc_o_c) doesn't exist.
265 # A simple variant is to prefix commands with $(Q) - that's useful
266 # for commands that shall be hidden in non-verbose mode.
268 # $(Q)ln $@ :<
270 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
271 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
273 ifeq ($(KBUILD_VERBOSE),1)
274 quiet =
276 else
277 quiet=quiet_
278 Q = @
279 endif
281 # If the user is running make -s (silent mode), suppress echoing of
282 # commands
284 ifneq ($(findstring s,$(MAKEFLAGS)),)
285 quiet=silent_
286 endif
288 export quiet Q KBUILD_VERBOSE
291 # Look for make include files relative to root of kernel src
292 MAKEFLAGS += --include-dir=$(srctree)
294 # We need some generic definitions.
295 include $(srctree)/scripts/Kbuild.include
297 # Make variables (CC, etc...)
299 AS = $(CROSS_COMPILE)as
300 LD = $(CROSS_COMPILE)ld
301 CC = $(CROSS_COMPILE)gcc
302 CPP = $(CC) -E
303 AR = $(CROSS_COMPILE)ar
304 NM = $(CROSS_COMPILE)nm
305 STRIP = $(CROSS_COMPILE)strip
306 OBJCOPY = $(CROSS_COMPILE)objcopy
307 OBJDUMP = $(CROSS_COMPILE)objdump
308 AWK = awk
309 GENKSYMS = scripts/genksyms/genksyms
310 DEPMOD = /sbin/depmod
311 KALLSYMS = scripts/kallsyms
312 PERL = perl
313 CHECK = sparse
315 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
316 MODFLAGS = -DMODULE
317 CFLAGS_MODULE = $(MODFLAGS)
318 AFLAGS_MODULE = $(MODFLAGS)
319 LDFLAGS_MODULE =
320 CFLAGS_KERNEL =
321 AFLAGS_KERNEL =
324 # Use LINUXINCLUDE when you must reference the include/ directory.
325 # Needed to be compatible with the O= option
326 LINUXINCLUDE := -Iinclude \
327 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
328 -include include/linux/autoconf.h
330 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
332 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
333 -fno-strict-aliasing -fno-common \
334 -Werror-implicit-function-declaration
335 KBUILD_AFLAGS := -D__ASSEMBLY__
337 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
338 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
339 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
341 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
342 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
343 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
344 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
346 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
347 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
348 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
350 # When compiling out-of-tree modules, put MODVERDIR in the module
351 # tree rather than in the kernel tree. The kernel tree might
352 # even be read-only.
353 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
355 # Files to ignore in find ... statements
357 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
358 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
360 # ===========================================================================
361 # Rules shared between *config targets and build targets
363 # Basic helpers built in scripts/
364 PHONY += scripts_basic
365 scripts_basic:
366 $(Q)$(MAKE) $(build)=scripts/basic
368 # To avoid any implicit rule to kick in, define an empty command.
369 scripts/basic/%: scripts_basic ;
371 PHONY += outputmakefile
372 # outputmakefile generates a Makefile in the output directory, if using a
373 # separate output directory. This allows convenient use of make in the
374 # output directory.
375 outputmakefile:
376 ifneq ($(KBUILD_SRC),)
377 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
378 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
379 endif
381 # To make sure we do not include .config for any of the *config targets
382 # catch them early, and hand them over to scripts/kconfig/Makefile
383 # It is allowed to specify more targets when calling make, including
384 # mixing *config targets and build targets.
385 # For example 'make oldconfig all'.
386 # Detect when mixed targets is specified, and make a second invocation
387 # of make so .config is not included in this case either (for *config).
389 no-dot-config-targets := clean mrproper distclean \
390 cscope TAGS tags help %docs check% \
391 include/linux/version.h headers_% \
392 kernelrelease kernelversion
394 config-targets := 0
395 mixed-targets := 0
396 dot-config := 1
398 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
399 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
400 dot-config := 0
401 endif
402 endif
404 ifeq ($(KBUILD_EXTMOD),)
405 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
406 config-targets := 1
407 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
408 mixed-targets := 1
409 endif
410 endif
411 endif
413 ifeq ($(mixed-targets),1)
414 # ===========================================================================
415 # We're called with mixed targets (*config and build targets).
416 # Handle them one by one.
418 %:: FORCE
419 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
421 else
422 ifeq ($(config-targets),1)
423 # ===========================================================================
424 # *config targets only - make sure prerequisites are updated, and descend
425 # in scripts/kconfig to make the *config target
427 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
428 # KBUILD_DEFCONFIG may point out an alternative default configuration
429 # used for 'make defconfig'
430 include $(srctree)/arch/$(SRCARCH)/Makefile
431 export KBUILD_DEFCONFIG
433 config %config: scripts_basic outputmakefile FORCE
434 $(Q)mkdir -p include/linux include/config
435 $(Q)$(MAKE) $(build)=scripts/kconfig $@
437 else
438 # ===========================================================================
439 # Build targets only - this includes vmlinux, arch specific targets, clean
440 # targets and others. In general all targets except *config targets.
442 ifeq ($(KBUILD_EXTMOD),)
443 # Additional helpers built in scripts/
444 # Carefully list dependencies so we do not try to build scripts twice
445 # in parallel
446 PHONY += scripts
447 scripts: scripts_basic include/config/auto.conf
448 $(Q)$(MAKE) $(build)=$(@)
450 # Objects we will link into vmlinux / subdirs we need to visit
451 init-y := init/
452 drivers-y := drivers/ sound/
453 net-y := net/
454 libs-y := lib/
455 core-y := usr/
456 endif # KBUILD_EXTMOD
458 ifeq ($(dot-config),1)
459 # Read in config
460 -include include/config/auto.conf
462 ifeq ($(KBUILD_EXTMOD),)
463 # Read in dependencies to all Kconfig* files, make sure to run
464 # oldconfig if changes are detected.
465 -include include/config/auto.conf.cmd
467 # To avoid any implicit rule to kick in, define an empty command
468 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
470 # If .config is newer than include/config/auto.conf, someone tinkered
471 # with it and forgot to run make oldconfig.
472 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
473 # we execute the config step to be sure to catch updated Kconfig files
474 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
475 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
476 else
477 # external modules needs include/linux/autoconf.h and include/config/auto.conf
478 # but do not care if they are up-to-date. Use auto.conf to trigger the test
479 PHONY += include/config/auto.conf
481 include/config/auto.conf:
482 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
483 echo; \
484 echo " ERROR: Kernel configuration is invalid."; \
485 echo " include/linux/autoconf.h or $@ are missing."; \
486 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
487 echo; \
488 /bin/false)
490 endif # KBUILD_EXTMOD
492 else
493 # Dummy target needed, because used as prerequisite
494 include/config/auto.conf: ;
495 endif # $(dot-config)
497 # The all: target is the default when no target is given on the
498 # command line.
499 # This allow a user to issue only 'make' to build a kernel including modules
500 # Defaults vmlinux but it is usually overridden in the arch makefile
501 all: vmlinux
503 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
504 KBUILD_CFLAGS += -Os
505 else
506 KBUILD_CFLAGS += -O2
507 endif
509 include $(srctree)/arch/$(SRCARCH)/Makefile
511 ifdef CONFIG_FRAME_POINTER
512 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
513 else
514 KBUILD_CFLAGS += -fomit-frame-pointer
515 endif
517 ifdef CONFIG_DEBUG_INFO
518 KBUILD_CFLAGS += -g
519 KBUILD_AFLAGS += -gdwarf-2
520 endif
522 # Force gcc to behave correct even for buggy distributions
523 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
525 # arch Makefile may override CC so keep this after arch Makefile is included
526 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
527 CHECKFLAGS += $(NOSTDINC_FLAGS)
529 # warn about C99 declaration after statement
530 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
532 # disable pointer signed / unsigned warnings in gcc 4.0
533 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
535 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
536 # But warn user when we do so
537 warn-assign = \
538 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
540 ifneq ($(KCPPFLAGS),)
541 $(call warn-assign,CPPFLAGS)
542 KBUILD_CPPFLAGS += $(KCPPFLAGS)
543 endif
544 ifneq ($(KAFLAGS),)
545 $(call warn-assign,AFLAGS)
546 KBUILD_AFLAGS += $(KAFLAGS)
547 endif
548 ifneq ($(KCFLAGS),)
549 $(call warn-assign,CFLAGS)
550 KBUILD_CFLAGS += $(KCFLAGS)
551 endif
553 # Use --build-id when available.
554 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
555 $(call ld-option, -Wl$(comma)--build-id,))
556 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
557 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
559 # Default kernel image to build when no specific target is given.
560 # KBUILD_IMAGE may be overruled on the command line or
561 # set in the environment
562 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
563 # this default value
564 export KBUILD_IMAGE ?= vmlinux
567 # INSTALL_PATH specifies where to place the updated kernel and system map
568 # images. Default is /boot, but you can set it to other values
569 export INSTALL_PATH ?= /boot
572 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
573 # relocations required by build roots. This is not defined in the
574 # makefile but the argument can be passed to make if needed.
577 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
578 export MODLIB
581 # INSTALL_MOD_STRIP, if defined, will cause modules to be
582 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
583 # the default option --strip-debug will be used. Otherwise,
584 # INSTALL_MOD_STRIP will used as the options to the strip command.
586 ifdef INSTALL_MOD_STRIP
587 ifeq ($(INSTALL_MOD_STRIP),1)
588 mod_strip_cmd = $(STRIP) --strip-debug
589 else
590 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
591 endif # INSTALL_MOD_STRIP=1
592 else
593 mod_strip_cmd = true
594 endif # INSTALL_MOD_STRIP
595 export mod_strip_cmd
598 ifeq ($(KBUILD_EXTMOD),)
599 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
601 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
602 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
603 $(net-y) $(net-m) $(libs-y) $(libs-m)))
605 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
606 $(init-n) $(init-) \
607 $(core-n) $(core-) $(drivers-n) $(drivers-) \
608 $(net-n) $(net-) $(libs-n) $(libs-))))
610 init-y := $(patsubst %/, %/built-in.o, $(init-y))
611 core-y := $(patsubst %/, %/built-in.o, $(core-y))
612 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
613 net-y := $(patsubst %/, %/built-in.o, $(net-y))
614 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
615 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
616 libs-y := $(libs-y1) $(libs-y2)
618 # Build vmlinux
619 # ---------------------------------------------------------------------------
620 # vmlinux is built from the objects selected by $(vmlinux-init) and
621 # $(vmlinux-main). Most are built-in.o files from top-level directories
622 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
623 # Ordering when linking is important, and $(vmlinux-init) must be first.
625 # vmlinux
628 # +-< $(vmlinux-init)
629 # | +--< init/version.o + more
631 # +--< $(vmlinux-main)
632 # | +--< driver/built-in.o mm/built-in.o + more
634 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
636 # vmlinux version (uname -v) cannot be updated during normal
637 # descending-into-subdirs phase since we do not yet know if we need to
638 # update vmlinux.
639 # Therefore this step is delayed until just before final link of vmlinux -
640 # except in the kallsyms case where it is done just before adding the
641 # symbols to the kernel.
643 # System.map is generated to document addresses of all kernel symbols
645 vmlinux-init := $(head-y) $(init-y)
646 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
647 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
648 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
649 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
651 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
652 # May be overridden by arch/$(ARCH)/Makefile
653 quiet_cmd_vmlinux__ ?= LD $@
654 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
655 -T $(vmlinux-lds) $(vmlinux-init) \
656 --start-group $(vmlinux-main) --end-group \
657 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
659 # Generate new vmlinux version
660 quiet_cmd_vmlinux_version = GEN .version
661 cmd_vmlinux_version = set -e; \
662 if [ ! -r .version ]; then \
663 rm -f .version; \
664 echo 1 >.version; \
665 else \
666 mv .version .old_version; \
667 expr 0$$(cat .old_version) + 1 >.version; \
668 fi; \
669 $(MAKE) $(build)=init
671 # Generate System.map
672 quiet_cmd_sysmap = SYSMAP
673 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
675 # Link of vmlinux
676 # If CONFIG_KALLSYMS is set .version is already updated
677 # Generate System.map and verify that the content is consistent
678 # Use + in front of the vmlinux_version rule to silent warning with make -j2
679 # First command is ':' to allow us to use + in front of the rule
680 define rule_vmlinux__
682 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
684 $(call cmd,vmlinux__)
685 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
687 $(Q)$(if $($(quiet)cmd_sysmap), \
688 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
689 $(cmd_sysmap) $@ System.map; \
690 if [ $$? -ne 0 ]; then \
691 rm -f $@; \
692 /bin/false; \
694 $(verify_kallsyms)
695 endef
698 ifdef CONFIG_KALLSYMS
699 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
700 # It's a three stage process:
701 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
702 # empty
703 # Running kallsyms on that gives us .tmp_kallsyms1.o with
704 # the right size - vmlinux version (uname -v) is updated during this step
705 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
706 # but due to the added section, some addresses have shifted.
707 # From here, we generate a correct .tmp_kallsyms2.o
708 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
709 # o Verify that the System.map from vmlinux matches the map from
710 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
711 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
712 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
713 # temporary bypass to allow the kernel to be built while the
714 # maintainers work out what went wrong with kallsyms.
716 ifdef CONFIG_KALLSYMS_EXTRA_PASS
717 last_kallsyms := 3
718 else
719 last_kallsyms := 2
720 endif
722 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
724 define verify_kallsyms
725 $(Q)$(if $($(quiet)cmd_sysmap), \
726 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
727 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
728 $(Q)cmp -s System.map .tmp_System.map || \
729 (echo Inconsistent kallsyms data; \
730 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
731 rm .tmp_kallsyms* ; /bin/false )
732 endef
734 # Update vmlinux version before link
735 # Use + in front of this rule to silent warning about make -j1
736 # First command is ':' to allow us to use + in front of this rule
737 cmd_ksym_ld = $(cmd_vmlinux__)
738 define rule_ksym_ld
740 +$(call cmd,vmlinux_version)
741 $(call cmd,vmlinux__)
742 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
743 endef
745 # Generate .S file with all kernel symbols
746 quiet_cmd_kallsyms = KSYM $@
747 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
748 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
750 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
751 $(call if_changed_dep,as_o_S)
753 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
754 $(call cmd,kallsyms)
756 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
757 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
758 $(call if_changed_rule,ksym_ld)
760 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
761 $(call if_changed,vmlinux__)
763 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
764 $(call if_changed,vmlinux__)
766 # Needs to visit scripts/ before $(KALLSYMS) can be used.
767 $(KALLSYMS): scripts ;
769 # Generate some data for debugging strange kallsyms problems
770 debug_kallsyms: .tmp_map$(last_kallsyms)
772 .tmp_map%: .tmp_vmlinux% FORCE
773 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
775 .tmp_map3: .tmp_map2
777 .tmp_map2: .tmp_map1
779 endif # ifdef CONFIG_KALLSYMS
781 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
782 # relevant sections renamed as per the linker script.
783 quiet_cmd_vmlinux-modpost = LD $@
784 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
785 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
786 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
787 define rule_vmlinux-modpost
789 +$(call cmd,vmlinux-modpost)
790 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
791 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
792 endef
794 # vmlinux image - including updated kernel symbols
795 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
796 ifdef CONFIG_HEADERS_CHECK
797 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
798 endif
799 ifdef CONFIG_SAMPLES
800 $(Q)$(MAKE) $(build)=samples
801 endif
802 $(call vmlinux-modpost)
803 $(call if_changed_rule,vmlinux__)
804 $(Q)rm -f .old_version
806 vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
807 $(call if_changed_rule,vmlinux-modpost)
809 # The actual objects are generated when descending,
810 # make sure no implicit rule kicks in
811 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
813 # Handle descending into subdirectories listed in $(vmlinux-dirs)
814 # Preset locale variables to speed up the build process. Limit locale
815 # tweaks to this spot to avoid wrong language settings when running
816 # make menuconfig etc.
817 # Error messages still appears in the original language
819 PHONY += $(vmlinux-dirs)
820 $(vmlinux-dirs): prepare scripts
821 $(Q)$(MAKE) $(build)=$@
823 # Build the kernel release string
825 # The KERNELRELEASE value built here is stored in the file
826 # include/config/kernel.release, and is used when executing several
827 # make targets, such as "make install" or "make modules_install."
829 # The eventual kernel release string consists of the following fields,
830 # shown in a hierarchical format to show how smaller parts are concatenated
831 # to form the larger and final value, with values coming from places like
832 # the Makefile, kernel config options, make command line options and/or
833 # SCM tag information.
835 # $(KERNELVERSION)
836 # $(VERSION) eg, 2
837 # $(PATCHLEVEL) eg, 6
838 # $(SUBLEVEL) eg, 18
839 # $(EXTRAVERSION) eg, -rc6
840 # $(localver-full)
841 # $(localver)
842 # localversion* (files without backups, containing '~')
843 # $(CONFIG_LOCALVERSION) (from kernel config setting)
844 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
845 # ./scripts/setlocalversion (SCM tag, if one exists)
846 # $(LOCALVERSION) (from make command line if provided)
848 # Note how the final $(localver-auto) string is included *only* if the
849 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
850 # moment, only git is supported but other SCMs can edit the script
851 # scripts/setlocalversion and add the appropriate checks as needed.
853 pattern = ".*/localversion[^~]*"
854 string = $(shell cat /dev/null \
855 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
857 localver = $(subst $(space),, $(string) \
858 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
860 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
861 # and if the SCM is know a tag from the SCM is appended.
862 # The appended tag is determined by the SCM used.
864 # Currently, only git is supported.
865 # Other SCMs can edit scripts/setlocalversion and add the appropriate
866 # checks as needed.
867 ifdef CONFIG_LOCALVERSION_AUTO
868 _localver-auto = $(shell $(CONFIG_SHELL) \
869 $(srctree)/scripts/setlocalversion $(srctree))
870 localver-auto = $(LOCALVERSION)$(_localver-auto)
871 endif
873 localver-full = $(localver)$(localver-auto)
875 # Store (new) KERNELRELASE string in include/config/kernel.release
876 kernelrelease = $(KERNELVERSION)$(localver-full)
877 include/config/kernel.release: include/config/auto.conf FORCE
878 $(Q)rm -f $@
879 $(Q)echo $(kernelrelease) > $@
882 # Things we need to do before we recursively start building the kernel
883 # or the modules are listed in "prepare".
884 # A multi level approach is used. prepareN is processed before prepareN-1.
885 # archprepare is used in arch Makefiles and when processed asm symlink,
886 # version.h and scripts_basic is processed / created.
888 # Listed in dependency order
889 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
891 # prepare3 is used to check if we are building in a separate output directory,
892 # and if so do:
893 # 1) Check that make has not been executed in the kernel src $(srctree)
894 # 2) Create the include2 directory, used for the second asm symlink
895 prepare3: include/config/kernel.release
896 ifneq ($(KBUILD_SRC),)
897 @echo ' Using $(srctree) as source for kernel'
898 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
899 echo " $(srctree) is not clean, please run 'make mrproper'";\
900 echo " in the '$(srctree)' directory.";\
901 /bin/false; \
903 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
904 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
905 endif
907 # prepare2 creates a makefile if using a separate output directory
908 prepare2: prepare3 outputmakefile
910 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
911 include/asm include/config/auto.conf
912 $(cmd_crmodverdir)
914 archprepare: prepare1 scripts_basic
916 prepare0: archprepare FORCE
917 $(Q)$(MAKE) $(build)=.
918 $(Q)$(MAKE) $(build)=. missing-syscalls
920 # All the preparing..
921 prepare: prepare0
923 # Leave this as default for preprocessing vmlinux.lds.S, which is now
924 # done in arch/$(ARCH)/kernel/Makefile
926 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
928 # The asm symlink changes when $(ARCH) changes.
929 # Detect this and ask user to run make mrproper
931 include/asm: FORCE
932 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
933 if [ -L include/asm ]; then \
934 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
935 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
936 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
937 exit 1; \
938 fi; \
939 else \
940 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
941 if [ ! -d include ]; then \
942 mkdir -p include; \
943 fi; \
944 ln -fsn asm-$(SRCARCH) $@; \
947 # Generate some files
948 # ---------------------------------------------------------------------------
950 # KERNELRELEASE can change from a few different places, meaning version.h
951 # needs to be updated, so this check is forced on all builds
953 uts_len := 64
954 define filechk_utsrelease.h
955 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
956 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
957 exit 1; \
958 fi; \
959 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
960 endef
962 define filechk_version.h
963 (echo \#define LINUX_VERSION_CODE $(shell \
964 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
965 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
966 endef
968 include/linux/version.h: $(srctree)/Makefile FORCE
969 $(call filechk,version.h)
971 include/linux/utsrelease.h: include/config/kernel.release FORCE
972 $(call filechk,utsrelease.h)
974 # ---------------------------------------------------------------------------
976 PHONY += depend dep
977 depend dep:
978 @echo '*** Warning: make $@ is unnecessary now.'
980 # ---------------------------------------------------------------------------
981 # Kernel headers
982 INSTALL_HDR_PATH=$(objtree)/usr
983 export INSTALL_HDR_PATH
985 HDRFILTER=generic i386 x86_64
986 HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
988 PHONY += headers_install_all
989 headers_install_all: include/linux/version.h scripts_basic FORCE
990 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
991 $(Q)for arch in $(HDRARCHES); do \
992 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
993 done
995 PHONY += headers_install
996 headers_install: include/linux/version.h scripts_basic FORCE
997 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
998 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
999 exit 1 ; fi
1000 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1001 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
1003 PHONY += headers_check_all
1004 headers_check_all: headers_install_all
1005 $(Q)for arch in $(HDRARCHES); do \
1006 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1007 done
1009 PHONY += headers_check
1010 headers_check: headers_install
1011 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
1013 # ---------------------------------------------------------------------------
1014 # Modules
1016 ifdef CONFIG_MODULES
1018 # By default, build modules as well
1020 all: modules
1022 # Build modules
1024 PHONY += modules
1025 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1026 @echo ' Building modules, stage 2.';
1027 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1030 # Target to prepare building external modules
1031 PHONY += modules_prepare
1032 modules_prepare: prepare scripts
1034 # Target to install modules
1035 PHONY += modules_install
1036 modules_install: _modinst_ _modinst_post
1038 PHONY += _modinst_
1039 _modinst_:
1040 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1041 echo "Warning: you may need to install module-init-tools"; \
1042 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1043 sleep 1; \
1045 @rm -rf $(MODLIB)/kernel
1046 @rm -f $(MODLIB)/source
1047 @mkdir -p $(MODLIB)/kernel
1048 @ln -s $(srctree) $(MODLIB)/source
1049 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1050 rm -f $(MODLIB)/build ; \
1051 ln -s $(objtree) $(MODLIB)/build ; \
1053 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1055 # This depmod is only for convenience to give the initial
1056 # boot a modules.dep even before / is mounted read-write. However the
1057 # boot script depmod is the master version.
1058 PHONY += _modinst_post
1059 _modinst_post: _modinst_
1060 $(call cmd,depmod)
1062 else # CONFIG_MODULES
1064 # Modules not configured
1065 # ---------------------------------------------------------------------------
1067 modules modules_install: FORCE
1068 @echo
1069 @echo "The present kernel configuration has modules disabled."
1070 @echo "Type 'make config' and enable loadable module support."
1071 @echo "Then build a kernel with module support enabled."
1072 @echo
1073 @exit 1
1075 endif # CONFIG_MODULES
1078 # Cleaning is done on three levels.
1079 # make clean Delete most generated files
1080 # Leave enough to build external modules
1081 # make mrproper Delete the current configuration, and all generated files
1082 # make distclean Remove editor backup files, patch leftover files and the like
1084 # Directories & files removed with 'make clean'
1085 CLEAN_DIRS += $(MODVERDIR)
1086 CLEAN_FILES += vmlinux System.map \
1087 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1089 # Directories & files removed with 'make mrproper'
1090 MRPROPER_DIRS += include/config include2 usr/include
1091 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1092 include/linux/autoconf.h include/linux/version.h \
1093 include/linux/utsrelease.h \
1094 Module.symvers tags TAGS cscope*
1096 # clean - Delete most, but leave enough to build external modules
1098 clean: rm-dirs := $(CLEAN_DIRS)
1099 clean: rm-files := $(CLEAN_FILES)
1100 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1102 PHONY += $(clean-dirs) clean archclean
1103 $(clean-dirs):
1104 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1106 clean: archclean $(clean-dirs)
1107 $(call cmd,rmdirs)
1108 $(call cmd,rmfiles)
1109 @find . $(RCS_FIND_IGNORE) \
1110 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1111 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1112 -o -name '*.symtypes' \) \
1113 -type f -print | xargs rm -f
1115 # mrproper - Delete all generated files, including .config
1117 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1118 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1119 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1121 PHONY += $(mrproper-dirs) mrproper archmrproper
1122 $(mrproper-dirs):
1123 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1125 mrproper: clean archmrproper $(mrproper-dirs)
1126 $(call cmd,rmdirs)
1127 $(call cmd,rmfiles)
1129 # distclean
1131 PHONY += distclean
1133 distclean: mrproper
1134 @find $(srctree) $(RCS_FIND_IGNORE) \
1135 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1136 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1137 -o -name '.*.rej' -o -size 0 \
1138 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1139 -type f -print | xargs rm -f
1142 # Packaging of the kernel to various formats
1143 # ---------------------------------------------------------------------------
1144 # rpm target kept for backward compatibility
1145 package-dir := $(srctree)/scripts/package
1147 %pkg: include/config/kernel.release FORCE
1148 $(Q)$(MAKE) $(build)=$(package-dir) $@
1149 rpm: include/config/kernel.release FORCE
1150 $(Q)$(MAKE) $(build)=$(package-dir) $@
1153 # Brief documentation of the typical targets used
1154 # ---------------------------------------------------------------------------
1156 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1157 boards := $(notdir $(boards))
1159 help:
1160 @echo 'Cleaning targets:'
1161 @echo ' clean - Remove most generated files but keep the config and'
1162 @echo ' enough build support to build external modules'
1163 @echo ' mrproper - Remove all generated files + config + various backup files'
1164 @echo ' distclean - mrproper + remove editor backup and patch files'
1165 @echo ''
1166 @echo 'Configuration targets:'
1167 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1168 @echo ''
1169 @echo 'Other generic targets:'
1170 @echo ' all - Build all targets marked with [*]'
1171 @echo '* vmlinux - Build the bare kernel'
1172 @echo '* modules - Build all modules'
1173 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1174 @echo ' dir/ - Build all files in dir and below'
1175 @echo ' dir/file.[ois] - Build specified target only'
1176 @echo ' dir/file.ko - Build module including final link'
1177 @echo ' rpm - Build a kernel as an RPM package'
1178 @echo ' tags/TAGS - Generate tags file for editors'
1179 @echo ' cscope - Generate cscope index'
1180 @echo ' kernelrelease - Output the release version string'
1181 @echo ' kernelversion - Output the version stored in Makefile'
1182 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1183 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1184 echo ' (default: $(INSTALL_HDR_PATH))'; \
1186 @echo ''
1187 @echo 'Static analysers'
1188 @echo ' checkstack - Generate a list of stack hogs'
1189 @echo ' namespacecheck - Name space analysis on compiled kernel'
1190 @echo ' export_report - List the usages of all exported symbols'
1191 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1192 echo ' headers_check - Sanity check on exported headers'; \
1194 @echo ''
1195 @echo 'Kernel packaging:'
1196 @$(MAKE) $(build)=$(package-dir) help
1197 @echo ''
1198 @echo 'Documentation targets:'
1199 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1200 @echo ''
1201 @echo 'Architecture specific targets ($(ARCH)):'
1202 @$(if $(archhelp),$(archhelp),\
1203 echo ' No architecture specific help defined for $(ARCH)')
1204 @echo ''
1205 @$(if $(boards), \
1206 $(foreach b, $(boards), \
1207 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1208 echo '')
1210 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1211 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1212 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1213 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1214 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1215 @echo ''
1216 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1217 @echo 'For further info see the ./README file'
1220 # Documentation targets
1221 # ---------------------------------------------------------------------------
1222 %docs: scripts_basic FORCE
1223 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1225 else # KBUILD_EXTMOD
1228 # External module support.
1229 # When building external modules the kernel used as basis is considered
1230 # read-only, and no consistency checks are made and the make
1231 # system is not used on the basis kernel. If updates are required
1232 # in the basis kernel ordinary make commands (without M=...) must
1233 # be used.
1235 # The following are the only valid targets when building external
1236 # modules.
1237 # make M=dir clean Delete all automatically generated files
1238 # make M=dir modules Make all modules in specified dir
1239 # make M=dir Same as 'make M=dir modules'
1240 # make M=dir modules_install
1241 # Install the modules built in the module directory
1242 # Assumes install directory is already created
1244 # We are always building modules
1245 KBUILD_MODULES := 1
1246 PHONY += crmodverdir
1247 crmodverdir:
1248 $(cmd_crmodverdir)
1250 PHONY += $(objtree)/Module.symvers
1251 $(objtree)/Module.symvers:
1252 @test -e $(objtree)/Module.symvers || ( \
1253 echo; \
1254 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1255 echo " is missing; modules will have no dependencies and modversions."; \
1256 echo )
1258 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1259 PHONY += $(module-dirs) modules
1260 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1261 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1263 modules: $(module-dirs)
1264 @echo ' Building modules, stage 2.';
1265 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1267 PHONY += modules_install
1268 modules_install: _emodinst_ _emodinst_post
1270 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1271 PHONY += _emodinst_
1272 _emodinst_:
1273 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1274 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1276 PHONY += _emodinst_post
1277 _emodinst_post: _emodinst_
1278 $(call cmd,depmod)
1280 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1282 PHONY += $(clean-dirs) clean
1283 $(clean-dirs):
1284 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1286 clean: rm-dirs := $(MODVERDIR)
1287 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1288 clean: $(clean-dirs)
1289 $(call cmd,rmdirs)
1290 $(call cmd,rmfiles)
1291 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1292 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1293 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1294 -type f -print | xargs rm -f
1296 help:
1297 @echo ' Building external modules.'
1298 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1299 @echo ''
1300 @echo ' modules - default target, build the module(s)'
1301 @echo ' modules_install - install the module'
1302 @echo ' clean - remove generated files in module directory only'
1303 @echo ''
1305 # Dummies...
1306 PHONY += prepare scripts
1307 prepare: ;
1308 scripts: ;
1309 endif # KBUILD_EXTMOD
1311 # Generate tags for editors
1312 # ---------------------------------------------------------------------------
1314 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1315 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1316 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1318 ifeq ($(src),$(obj))
1319 __srctree =
1320 else
1321 __srctree = $(srctree)/
1322 endif
1324 ifeq ($(ALLSOURCE_ARCHS),)
1325 ifeq ($(ARCH),um)
1326 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1327 else
1328 ALLINCLUDE_ARCHS := $(SRCARCH)
1329 endif
1330 else
1331 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1332 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1333 endif
1335 ALLSOURCE_ARCHS := $(SRCARCH)
1337 define find-sources
1338 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1339 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1340 -name $1 -print; \
1341 done ; \
1342 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1343 -name $1 -print; \
1344 find $(__srctree)include $(RCS_FIND_IGNORE) \
1345 \( -name config -o -name 'asm-*' \) -prune \
1346 -o -name $1 -print; \
1347 for arch in $(ALLINCLUDE_ARCHS) ; do \
1348 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1349 -name $1 -print; \
1350 done ; \
1351 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1352 -name $1 -print; \
1353 find $(__srctree) $(RCS_FIND_IGNORE) \
1354 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1355 -name $1 -print; \
1357 endef
1359 define all-sources
1360 $(call find-sources,'*.[chS]')
1361 endef
1362 define all-kconfigs
1363 $(call find-sources,'Kconfig*')
1364 endef
1365 define all-defconfigs
1366 $(call find-sources,'defconfig')
1367 endef
1369 define xtags
1370 if $1 --version 2>&1 | grep -iq exuberant; then \
1371 $(all-sources) | xargs $1 -a \
1372 -I __initdata,__exitdata,__acquires,__releases \
1373 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1374 --extra=+f --c-kinds=+px \
1375 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1376 $(all-kconfigs) | xargs $1 -a \
1377 --langdef=kconfig \
1378 --language-force=kconfig \
1379 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1380 $(all-defconfigs) | xargs -r $1 -a \
1381 --langdef=dotconfig \
1382 --language-force=dotconfig \
1383 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1384 elif $1 --version 2>&1 | grep -iq emacs; then \
1385 $(all-sources) | xargs $1 -a; \
1386 $(all-kconfigs) | xargs $1 -a \
1387 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1388 $(all-defconfigs) | xargs -r $1 -a \
1389 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1390 else \
1391 $(all-sources) | xargs $1 -a; \
1393 endef
1395 quiet_cmd_cscope-file = FILELST cscope.files
1396 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1398 quiet_cmd_cscope = MAKE cscope.out
1399 cmd_cscope = cscope -b
1401 cscope: FORCE
1402 $(call cmd,cscope-file)
1403 $(call cmd,cscope)
1405 quiet_cmd_TAGS = MAKE $@
1406 define cmd_TAGS
1407 rm -f $@; \
1408 $(call xtags,etags)
1409 endef
1411 TAGS: FORCE
1412 $(call cmd,TAGS)
1414 quiet_cmd_tags = MAKE $@
1415 define cmd_tags
1416 rm -f $@; \
1417 $(call xtags,ctags)
1418 endef
1420 tags: FORCE
1421 $(call cmd,tags)
1424 # Scripts to check various things for consistency
1425 # ---------------------------------------------------------------------------
1427 includecheck:
1428 find * $(RCS_FIND_IGNORE) \
1429 -name '*.[hcS]' -type f -print | sort \
1430 | xargs $(PERL) -w scripts/checkincludes.pl
1432 versioncheck:
1433 find * $(RCS_FIND_IGNORE) \
1434 -name '*.[hcS]' -type f -print | sort \
1435 | xargs $(PERL) -w scripts/checkversion.pl
1437 namespacecheck:
1438 $(PERL) $(srctree)/scripts/namespace.pl
1440 export_report:
1441 $(PERL) $(srctree)/scripts/export_report.pl
1443 endif #ifeq ($(config-targets),1)
1444 endif #ifeq ($(mixed-targets),1)
1446 PHONY += checkstack kernelrelease kernelversion
1448 # UML needs a little special treatment here. It wants to use the host
1449 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1450 # else wants $(ARCH), including people doing cross-builds, which means
1451 # that $(SUBARCH) doesn't work here.
1452 ifeq ($(ARCH), um)
1453 CHECKSTACK_ARCH := $(SUBARCH)
1454 else
1455 CHECKSTACK_ARCH := $(ARCH)
1456 endif
1457 checkstack:
1458 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1459 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1461 kernelrelease:
1462 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1463 $(error kernelrelease not valid - run 'make prepare' to update it))
1464 kernelversion:
1465 @echo $(KERNELVERSION)
1467 # Single targets
1468 # ---------------------------------------------------------------------------
1469 # Single targets are compatible with:
1470 # - build whith mixed source and output
1471 # - build with separate output dir 'make O=...'
1472 # - external modules
1474 # target-dir => where to store outputfile
1475 # build-dir => directory in kernel source tree to use
1477 ifeq ($(KBUILD_EXTMOD),)
1478 build-dir = $(patsubst %/,%,$(dir $@))
1479 target-dir = $(dir $@)
1480 else
1481 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1482 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1483 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1484 endif
1486 %.s: %.c prepare scripts FORCE
1487 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1488 %.i: %.c prepare scripts FORCE
1489 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1490 %.o: %.c prepare scripts FORCE
1491 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1492 %.lst: %.c prepare scripts FORCE
1493 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1494 %.s: %.S prepare scripts FORCE
1495 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1496 %.o: %.S prepare scripts FORCE
1497 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1498 %.symtypes: %.c prepare scripts FORCE
1499 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1501 # Modules
1502 / %/: prepare scripts FORCE
1503 $(cmd_crmodverdir)
1504 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1505 $(build)=$(build-dir)
1506 %.ko: prepare scripts FORCE
1507 $(cmd_crmodverdir)
1508 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1509 $(build)=$(build-dir) $(@:.ko=.o)
1510 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1512 # FIXME Should go into a make.lib or something
1513 # ===========================================================================
1515 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1516 cmd_rmdirs = rm -rf $(rm-dirs)
1518 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1519 cmd_rmfiles = rm -f $(rm-files)
1521 # Run depmod only is we have System.map and depmod is executable
1522 # and we build for the host arch
1523 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1524 cmd_depmod = \
1525 if [ -r System.map -a -x $(DEPMOD) ]; then \
1526 $(DEPMOD) -ae -F System.map \
1527 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1528 $(KERNELRELEASE); \
1531 # Create temporary dir for module support files
1532 # clean it up only when building all modules
1533 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1534 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1536 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1537 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1538 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1540 quiet_cmd_as_o_S = AS $@
1541 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1543 # read all saved command lines
1545 targets := $(wildcard $(sort $(targets)))
1546 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1548 ifneq ($(cmd_files),)
1549 $(cmd_files): ; # Do not try to update included dependency files
1550 include $(cmd_files)
1551 endif
1553 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1554 # Usage:
1555 # $(Q)$(MAKE) $(clean)=dir
1556 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1558 endif # skip-makefile
1560 PHONY += FORCE
1561 FORCE:
1563 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1564 Makefile: ;
1566 # Declare the contents of the .PHONY variable as phony. We keep that
1567 # information in a variable se we can use it in if_changed and friends.
1568 .PHONY: $(PHONY)