revert-mm-fix-blkdev-size-calculation-in-generic_write_checks
[linux-2.6/linux-trees-mm.git] / Makefile
blob583ef5175561aa20ac88c25cf7ccf285e8ff584c
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 24
4 EXTRAVERSION = -rc2-mm1
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 # for i386 and x86_64 we use SRCARCH equal to x86
201 SRCARCH := $(if $(filter x86_64 i386,$(SRCARCH)),x86,$(SRCARCH))
203 KCONFIG_CONFIG ?= .config
205 # SHELL used by kbuild
206 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
207 else if [ -x /bin/bash ]; then echo /bin/bash; \
208 else echo sh; fi ; fi)
210 HOSTCC = gcc
211 HOSTCXX = g++
212 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
213 HOSTCXXFLAGS = -O2
215 # Decide whether to build built-in, modular, or both.
216 # Normally, just do built-in.
218 KBUILD_MODULES :=
219 KBUILD_BUILTIN := 1
221 # If we have only "make modules", don't compile built-in objects.
222 # When we're building modules with modversions, we need to consider
223 # the built-in objects during the descend as well, in order to
224 # make sure the checksums are up to date before we record them.
226 ifeq ($(MAKECMDGOALS),modules)
227 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
228 endif
230 # If we have "make <whatever> modules", compile modules
231 # in addition to whatever we do anyway.
232 # Just "make" or "make all" shall build modules as well
234 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
235 KBUILD_MODULES := 1
236 endif
238 ifeq ($(MAKECMDGOALS),)
239 KBUILD_MODULES := 1
240 endif
242 export KBUILD_MODULES KBUILD_BUILTIN
243 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
245 # Beautify output
246 # ---------------------------------------------------------------------------
248 # Normally, we echo the whole command before executing it. By making
249 # that echo $($(quiet)$(cmd)), we now have the possibility to set
250 # $(quiet) to choose other forms of output instead, e.g.
252 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
253 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
255 # If $(quiet) is empty, the whole command will be printed.
256 # If it is set to "quiet_", only the short version will be printed.
257 # If it is set to "silent_", nothing will be printed at all, since
258 # the variable $(silent_cmd_cc_o_c) doesn't exist.
260 # A simple variant is to prefix commands with $(Q) - that's useful
261 # for commands that shall be hidden in non-verbose mode.
263 # $(Q)ln $@ :<
265 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
266 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
268 ifeq ($(KBUILD_VERBOSE),1)
269 quiet =
271 else
272 quiet=quiet_
273 Q = @
274 endif
276 # If the user is running make -s (silent mode), suppress echoing of
277 # commands
279 ifneq ($(findstring s,$(MAKEFLAGS)),)
280 quiet=silent_
281 endif
283 export quiet Q KBUILD_VERBOSE
286 # Look for make include files relative to root of kernel src
287 MAKEFLAGS += --include-dir=$(srctree)
289 # We need some generic definitions.
290 include $(srctree)/scripts/Kbuild.include
292 # Make variables (CC, etc...)
294 AS = $(CROSS_COMPILE)as
295 LD = $(CROSS_COMPILE)ld
296 CC = $(CROSS_COMPILE)gcc
297 CPP = $(CC) -E
298 AR = $(CROSS_COMPILE)ar
299 NM = $(CROSS_COMPILE)nm
300 STRIP = $(CROSS_COMPILE)strip
301 OBJCOPY = $(CROSS_COMPILE)objcopy
302 OBJDUMP = $(CROSS_COMPILE)objdump
303 AWK = awk
304 GENKSYMS = scripts/genksyms/genksyms
305 DEPMOD = /sbin/depmod
306 KALLSYMS = scripts/kallsyms
307 PERL = perl
308 CHECK = sparse
310 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
311 MODFLAGS = -DMODULE
312 CFLAGS_MODULE = $(MODFLAGS)
313 AFLAGS_MODULE = $(MODFLAGS)
314 LDFLAGS_MODULE =
315 CFLAGS_KERNEL =
316 AFLAGS_KERNEL =
319 # Use LINUXINCLUDE when you must reference the include/ directory.
320 # Needed to be compatible with the O= option
321 LINUXINCLUDE := -Iinclude \
322 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
323 -include include/linux/autoconf.h
325 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
327 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
328 -fno-strict-aliasing -fno-common \
329 -Werror-implicit-function-declaration
330 KBUILD_AFLAGS := -D__ASSEMBLY__
332 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
333 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
334 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
336 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
337 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
338 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
339 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
341 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
342 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
343 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
345 # When compiling out-of-tree modules, put MODVERDIR in the module
346 # tree rather than in the kernel tree. The kernel tree might
347 # even be read-only.
348 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
350 # Files to ignore in find ... statements
352 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
353 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
355 # ===========================================================================
356 # Rules shared between *config targets and build targets
358 # Basic helpers built in scripts/
359 PHONY += scripts_basic
360 scripts_basic:
361 $(Q)$(MAKE) $(build)=scripts/basic
363 # To avoid any implicit rule to kick in, define an empty command.
364 scripts/basic/%: scripts_basic ;
366 PHONY += outputmakefile
367 # outputmakefile generates a Makefile in the output directory, if using a
368 # separate output directory. This allows convenient use of make in the
369 # output directory.
370 outputmakefile:
371 ifneq ($(KBUILD_SRC),)
372 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
373 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
374 endif
376 # To make sure we do not include .config for any of the *config targets
377 # catch them early, and hand them over to scripts/kconfig/Makefile
378 # It is allowed to specify more targets when calling make, including
379 # mixing *config targets and build targets.
380 # For example 'make oldconfig all'.
381 # Detect when mixed targets is specified, and make a second invocation
382 # of make so .config is not included in this case either (for *config).
384 no-dot-config-targets := clean mrproper distclean \
385 cscope TAGS tags help %docs check% \
386 include/linux/version.h headers_% \
387 kernelrelease kernelversion
389 config-targets := 0
390 mixed-targets := 0
391 dot-config := 1
393 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
394 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
395 dot-config := 0
396 endif
397 endif
399 ifeq ($(KBUILD_EXTMOD),)
400 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
401 config-targets := 1
402 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
403 mixed-targets := 1
404 endif
405 endif
406 endif
408 ifeq ($(mixed-targets),1)
409 # ===========================================================================
410 # We're called with mixed targets (*config and build targets).
411 # Handle them one by one.
413 %:: FORCE
414 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
416 else
417 ifeq ($(config-targets),1)
418 # ===========================================================================
419 # *config targets only - make sure prerequisites are updated, and descend
420 # in scripts/kconfig to make the *config target
422 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
423 # KBUILD_DEFCONFIG may point out an alternative default configuration
424 # used for 'make defconfig'
425 include $(srctree)/arch/$(SRCARCH)/Makefile
426 export KBUILD_DEFCONFIG
428 config %config: scripts_basic outputmakefile FORCE
429 $(Q)mkdir -p include/linux include/config
430 $(Q)$(MAKE) $(build)=scripts/kconfig $@
432 else
433 # ===========================================================================
434 # Build targets only - this includes vmlinux, arch specific targets, clean
435 # targets and others. In general all targets except *config targets.
437 ifeq ($(KBUILD_EXTMOD),)
438 # Additional helpers built in scripts/
439 # Carefully list dependencies so we do not try to build scripts twice
440 # in parallel
441 PHONY += scripts
442 scripts: scripts_basic include/config/auto.conf
443 $(Q)$(MAKE) $(build)=$(@)
445 # Objects we will link into vmlinux / subdirs we need to visit
446 init-y := init/
447 drivers-y := drivers/ sound/
448 net-y := net/
449 libs-y := lib/
450 core-y := usr/
451 endif # KBUILD_EXTMOD
453 ifeq ($(dot-config),1)
454 # Read in config
455 -include include/config/auto.conf
457 ifeq ($(KBUILD_EXTMOD),)
458 # Read in dependencies to all Kconfig* files, make sure to run
459 # oldconfig if changes are detected.
460 -include include/config/auto.conf.cmd
462 # To avoid any implicit rule to kick in, define an empty command
463 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
465 # If .config is newer than include/config/auto.conf, someone tinkered
466 # with it and forgot to run make oldconfig.
467 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
468 # we execute the config step to be sure to catch updated Kconfig files
469 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
470 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
471 else
472 # external modules needs include/linux/autoconf.h and include/config/auto.conf
473 # but do not care if they are up-to-date. Use auto.conf to trigger the test
474 PHONY += include/config/auto.conf
476 include/config/auto.conf:
477 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
478 echo; \
479 echo " ERROR: Kernel configuration is invalid."; \
480 echo " include/linux/autoconf.h or $@ are missing."; \
481 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
482 echo; \
483 /bin/false)
485 endif # KBUILD_EXTMOD
487 else
488 # Dummy target needed, because used as prerequisite
489 include/config/auto.conf: ;
490 endif # $(dot-config)
492 # The all: target is the default when no target is given on the
493 # command line.
494 # This allow a user to issue only 'make' to build a kernel including modules
495 # Defaults vmlinux but it is usually overridden in the arch makefile
496 all: vmlinux
498 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
499 KBUILD_CFLAGS += -Os
500 else
501 KBUILD_CFLAGS += -O2
502 endif
504 include $(srctree)/arch/$(SRCARCH)/Makefile
506 ifdef CONFIG_FRAME_POINTER
507 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
508 else
509 KBUILD_CFLAGS += -fomit-frame-pointer
510 endif
512 ifdef CONFIG_DEBUG_INFO
513 KBUILD_CFLAGS += -g
514 KBUILD_AFLAGS += -gdwarf-2
515 endif
517 # Force gcc to behave correct even for buggy distributions
518 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
520 # arch Makefile may override CC so keep this after arch Makefile is included
521 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
522 CHECKFLAGS += $(NOSTDINC_FLAGS)
524 # warn about C99 declaration after statement
525 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
527 # disable pointer signed / unsigned warnings in gcc 4.0
528 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
530 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
531 # But warn user when we do so
532 warn-assign = \
533 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
535 ifneq ($(KCPPFLAGS),)
536 $(call warn-assign,CPPFLAGS)
537 KBUILD_CPPFLAGS += $(KCPPFLAGS)
538 endif
539 ifneq ($(KAFLAGS),)
540 $(call warn-assign,AFLAGS)
541 KBUILD_AFLAGS += $(KAFLAGS)
542 endif
543 ifneq ($(KCFLAGS),)
544 $(call warn-assign,CFLAGS)
545 KBUILD_CFLAGS += $(KCFLAGS)
546 endif
548 # Use --build-id when available.
549 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
550 $(call ld-option, -Wl$(comma)--build-id,))
551 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
552 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
554 # Default kernel image to build when no specific target is given.
555 # KBUILD_IMAGE may be overruled on the command line or
556 # set in the environment
557 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
558 # this default value
559 export KBUILD_IMAGE ?= vmlinux
562 # INSTALL_PATH specifies where to place the updated kernel and system map
563 # images. Default is /boot, but you can set it to other values
564 export INSTALL_PATH ?= /boot
567 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
568 # relocations required by build roots. This is not defined in the
569 # makefile but the argument can be passed to make if needed.
572 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
573 export MODLIB
576 # INSTALL_MOD_STRIP, if defined, will cause modules to be
577 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
578 # the default option --strip-debug will be used. Otherwise,
579 # INSTALL_MOD_STRIP will used as the options to the strip command.
581 ifdef INSTALL_MOD_STRIP
582 ifeq ($(INSTALL_MOD_STRIP),1)
583 mod_strip_cmd = $(STRIP) --strip-debug
584 else
585 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
586 endif # INSTALL_MOD_STRIP=1
587 else
588 mod_strip_cmd = true
589 endif # INSTALL_MOD_STRIP
590 export mod_strip_cmd
593 ifeq ($(KBUILD_EXTMOD),)
594 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
596 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
597 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
598 $(net-y) $(net-m) $(libs-y) $(libs-m)))
600 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
601 $(init-n) $(init-) \
602 $(core-n) $(core-) $(drivers-n) $(drivers-) \
603 $(net-n) $(net-) $(libs-n) $(libs-))))
605 init-y := $(patsubst %/, %/built-in.o, $(init-y))
606 core-y := $(patsubst %/, %/built-in.o, $(core-y))
607 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
608 net-y := $(patsubst %/, %/built-in.o, $(net-y))
609 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
610 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
611 libs-y := $(libs-y1) $(libs-y2)
613 # Build vmlinux
614 # ---------------------------------------------------------------------------
615 # vmlinux is built from the objects selected by $(vmlinux-init) and
616 # $(vmlinux-main). Most are built-in.o files from top-level directories
617 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
618 # Ordering when linking is important, and $(vmlinux-init) must be first.
620 # vmlinux
623 # +-< $(vmlinux-init)
624 # | +--< init/version.o + more
626 # +--< $(vmlinux-main)
627 # | +--< driver/built-in.o mm/built-in.o + more
629 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
631 # vmlinux version (uname -v) cannot be updated during normal
632 # descending-into-subdirs phase since we do not yet know if we need to
633 # update vmlinux.
634 # Therefore this step is delayed until just before final link of vmlinux -
635 # except in the kallsyms case where it is done just before adding the
636 # symbols to the kernel.
638 # System.map is generated to document addresses of all kernel symbols
640 vmlinux-init := $(head-y) $(init-y)
641 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
642 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
643 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
644 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
646 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
647 # May be overridden by arch/$(ARCH)/Makefile
648 quiet_cmd_vmlinux__ ?= LD $@
649 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
650 -T $(vmlinux-lds) $(vmlinux-init) \
651 --start-group $(vmlinux-main) --end-group \
652 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
654 # Generate new vmlinux version
655 quiet_cmd_vmlinux_version = GEN .version
656 cmd_vmlinux_version = set -e; \
657 if [ ! -r .version ]; then \
658 rm -f .version; \
659 echo 1 >.version; \
660 else \
661 mv .version .old_version; \
662 expr 0$$(cat .old_version) + 1 >.version; \
663 fi; \
664 $(MAKE) $(build)=init
666 # Generate System.map
667 quiet_cmd_sysmap = SYSMAP
668 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
670 # Link of vmlinux
671 # If CONFIG_KALLSYMS is set .version is already updated
672 # Generate System.map and verify that the content is consistent
673 # Use + in front of the vmlinux_version rule to silent warning with make -j2
674 # First command is ':' to allow us to use + in front of the rule
675 define rule_vmlinux__
677 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
679 $(call cmd,vmlinux__)
680 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
682 $(Q)$(if $($(quiet)cmd_sysmap), \
683 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
684 $(cmd_sysmap) $@ System.map; \
685 if [ $$? -ne 0 ]; then \
686 rm -f $@; \
687 /bin/false; \
689 $(verify_kallsyms)
690 endef
693 ifdef CONFIG_KALLSYMS
694 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
695 # It's a three stage process:
696 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
697 # empty
698 # Running kallsyms on that gives us .tmp_kallsyms1.o with
699 # the right size - vmlinux version (uname -v) is updated during this step
700 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
701 # but due to the added section, some addresses have shifted.
702 # From here, we generate a correct .tmp_kallsyms2.o
703 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
704 # o Verify that the System.map from vmlinux matches the map from
705 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
706 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
707 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
708 # temporary bypass to allow the kernel to be built while the
709 # maintainers work out what went wrong with kallsyms.
711 ifdef CONFIG_KALLSYMS_EXTRA_PASS
712 last_kallsyms := 3
713 else
714 last_kallsyms := 2
715 endif
717 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
719 define verify_kallsyms
720 $(Q)$(if $($(quiet)cmd_sysmap), \
721 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
722 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
723 $(Q)cmp -s System.map .tmp_System.map || \
724 (echo Inconsistent kallsyms data; \
725 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
726 rm .tmp_kallsyms* ; /bin/false )
727 endef
729 # Update vmlinux version before link
730 # Use + in front of this rule to silent warning about make -j1
731 # First command is ':' to allow us to use + in front of this rule
732 cmd_ksym_ld = $(cmd_vmlinux__)
733 define rule_ksym_ld
735 +$(call cmd,vmlinux_version)
736 $(call cmd,vmlinux__)
737 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
738 endef
740 # Generate .S file with all kernel symbols
741 quiet_cmd_kallsyms = KSYM $@
742 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
743 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
745 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
746 $(call if_changed_dep,as_o_S)
748 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
749 $(call cmd,kallsyms)
751 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
752 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
753 $(call if_changed_rule,ksym_ld)
755 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
756 $(call if_changed,vmlinux__)
758 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
759 $(call if_changed,vmlinux__)
761 # Needs to visit scripts/ before $(KALLSYMS) can be used.
762 $(KALLSYMS): scripts ;
764 # Generate some data for debugging strange kallsyms problems
765 debug_kallsyms: .tmp_map$(last_kallsyms)
767 .tmp_map%: .tmp_vmlinux% FORCE
768 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
770 .tmp_map3: .tmp_map2
772 .tmp_map2: .tmp_map1
774 endif # ifdef CONFIG_KALLSYMS
776 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
777 # relevant sections renamed as per the linker script.
778 quiet_cmd_vmlinux-modpost = LD $@
779 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
780 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
781 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
782 define rule_vmlinux-modpost
784 +$(call cmd,vmlinux-modpost)
785 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
786 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
787 endef
789 # vmlinux image - including updated kernel symbols
790 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
791 ifdef CONFIG_HEADERS_CHECK
792 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
793 endif
794 ifdef CONFIG_SAMPLES
795 $(Q)$(MAKE) $(build)=samples
796 endif
797 $(call vmlinux-modpost)
798 $(call if_changed_rule,vmlinux__)
799 $(Q)rm -f .old_version
801 vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
802 $(call if_changed_rule,vmlinux-modpost)
804 # The actual objects are generated when descending,
805 # make sure no implicit rule kicks in
806 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
808 # Handle descending into subdirectories listed in $(vmlinux-dirs)
809 # Preset locale variables to speed up the build process. Limit locale
810 # tweaks to this spot to avoid wrong language settings when running
811 # make menuconfig etc.
812 # Error messages still appears in the original language
814 PHONY += $(vmlinux-dirs)
815 $(vmlinux-dirs): prepare scripts
816 $(Q)$(MAKE) $(build)=$@
818 # Build the kernel release string
820 # The KERNELRELEASE value built here is stored in the file
821 # include/config/kernel.release, and is used when executing several
822 # make targets, such as "make install" or "make modules_install."
824 # The eventual kernel release string consists of the following fields,
825 # shown in a hierarchical format to show how smaller parts are concatenated
826 # to form the larger and final value, with values coming from places like
827 # the Makefile, kernel config options, make command line options and/or
828 # SCM tag information.
830 # $(KERNELVERSION)
831 # $(VERSION) eg, 2
832 # $(PATCHLEVEL) eg, 6
833 # $(SUBLEVEL) eg, 18
834 # $(EXTRAVERSION) eg, -rc6
835 # $(localver-full)
836 # $(localver)
837 # localversion* (files without backups, containing '~')
838 # $(CONFIG_LOCALVERSION) (from kernel config setting)
839 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
840 # ./scripts/setlocalversion (SCM tag, if one exists)
841 # $(LOCALVERSION) (from make command line if provided)
843 # Note how the final $(localver-auto) string is included *only* if the
844 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
845 # moment, only git is supported but other SCMs can edit the script
846 # scripts/setlocalversion and add the appropriate checks as needed.
848 pattern = ".*/localversion[^~]*"
849 string = $(shell cat /dev/null \
850 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
852 localver = $(subst $(space),, $(string) \
853 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
855 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
856 # and if the SCM is know a tag from the SCM is appended.
857 # The appended tag is determined by the SCM used.
859 # Currently, only git is supported.
860 # Other SCMs can edit scripts/setlocalversion and add the appropriate
861 # checks as needed.
862 ifdef CONFIG_LOCALVERSION_AUTO
863 _localver-auto = $(shell $(CONFIG_SHELL) \
864 $(srctree)/scripts/setlocalversion $(srctree))
865 localver-auto = $(LOCALVERSION)$(_localver-auto)
866 endif
868 localver-full = $(localver)$(localver-auto)
870 # Store (new) KERNELRELASE string in include/config/kernel.release
871 kernelrelease = $(KERNELVERSION)$(localver-full)
872 include/config/kernel.release: include/config/auto.conf FORCE
873 $(Q)rm -f $@
874 $(Q)echo $(kernelrelease) > $@
877 # Things we need to do before we recursively start building the kernel
878 # or the modules are listed in "prepare".
879 # A multi level approach is used. prepareN is processed before prepareN-1.
880 # archprepare is used in arch Makefiles and when processed asm symlink,
881 # version.h and scripts_basic is processed / created.
883 # Listed in dependency order
884 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
886 # prepare3 is used to check if we are building in a separate output directory,
887 # and if so do:
888 # 1) Check that make has not been executed in the kernel src $(srctree)
889 # 2) Create the include2 directory, used for the second asm symlink
890 prepare3: include/config/kernel.release
891 ifneq ($(KBUILD_SRC),)
892 @echo ' Using $(srctree) as source for kernel'
893 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
894 echo " $(srctree) is not clean, please run 'make mrproper'";\
895 echo " in the '$(srctree)' directory.";\
896 /bin/false; \
898 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
899 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
900 endif
902 # prepare2 creates a makefile if using a separate output directory
903 prepare2: prepare3 outputmakefile
905 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
906 include/asm include/config/auto.conf
907 $(cmd_crmodverdir)
909 archprepare: prepare1 scripts_basic
911 prepare0: archprepare FORCE
912 $(Q)$(MAKE) $(build)=.
913 $(Q)$(MAKE) $(build)=. missing-syscalls
915 # All the preparing..
916 prepare: prepare0
918 # Leave this as default for preprocessing vmlinux.lds.S, which is now
919 # done in arch/$(ARCH)/kernel/Makefile
921 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
923 # The asm symlink changes when $(ARCH) changes.
924 # Detect this and ask user to run make mrproper
926 include/asm: FORCE
927 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
928 if [ -L include/asm ]; then \
929 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
930 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
931 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
932 exit 1; \
933 fi; \
934 else \
935 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
936 if [ ! -d include ]; then \
937 mkdir -p include; \
938 fi; \
939 ln -fsn asm-$(SRCARCH) $@; \
942 # Generate some files
943 # ---------------------------------------------------------------------------
945 # KERNELRELEASE can change from a few different places, meaning version.h
946 # needs to be updated, so this check is forced on all builds
948 uts_len := 64
949 define filechk_utsrelease.h
950 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
951 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
952 exit 1; \
953 fi; \
954 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
955 endef
957 define filechk_version.h
958 (echo \#define LINUX_VERSION_CODE $(shell \
959 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
960 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
961 endef
963 include/linux/version.h: $(srctree)/Makefile FORCE
964 $(call filechk,version.h)
966 include/linux/utsrelease.h: include/config/kernel.release FORCE
967 $(call filechk,utsrelease.h)
969 # ---------------------------------------------------------------------------
971 PHONY += depend dep
972 depend dep:
973 @echo '*** Warning: make $@ is unnecessary now.'
975 # ---------------------------------------------------------------------------
976 # Kernel headers
977 INSTALL_HDR_PATH=$(objtree)/usr
978 export INSTALL_HDR_PATH
980 HDRFILTER=generic i386 x86_64
981 HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
983 PHONY += headers_install_all
984 headers_install_all: include/linux/version.h scripts_basic FORCE
985 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
986 $(Q)for arch in $(HDRARCHES); do \
987 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
988 done
990 PHONY += headers_install
991 headers_install: include/linux/version.h scripts_basic FORCE
992 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
993 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
994 exit 1 ; fi
995 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
996 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
998 PHONY += headers_check_all
999 headers_check_all: headers_install_all
1000 $(Q)for arch in $(HDRARCHES); do \
1001 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1002 done
1004 PHONY += headers_check
1005 headers_check: headers_install
1006 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
1008 # ---------------------------------------------------------------------------
1009 # Modules
1011 ifdef CONFIG_MODULES
1013 # By default, build modules as well
1015 all: modules
1017 # Build modules
1019 PHONY += modules
1020 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1021 @echo ' Building modules, stage 2.';
1022 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1025 # Target to prepare building external modules
1026 PHONY += modules_prepare
1027 modules_prepare: prepare scripts
1029 # Target to install modules
1030 PHONY += modules_install
1031 modules_install: _modinst_ _modinst_post
1033 PHONY += _modinst_
1034 _modinst_:
1035 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1036 echo "Warning: you may need to install module-init-tools"; \
1037 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1038 sleep 1; \
1040 @rm -rf $(MODLIB)/kernel
1041 @rm -f $(MODLIB)/source
1042 @mkdir -p $(MODLIB)/kernel
1043 @ln -s $(srctree) $(MODLIB)/source
1044 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1045 rm -f $(MODLIB)/build ; \
1046 ln -s $(objtree) $(MODLIB)/build ; \
1048 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1050 # This depmod is only for convenience to give the initial
1051 # boot a modules.dep even before / is mounted read-write. However the
1052 # boot script depmod is the master version.
1053 PHONY += _modinst_post
1054 _modinst_post: _modinst_
1055 $(call cmd,depmod)
1057 else # CONFIG_MODULES
1059 # Modules not configured
1060 # ---------------------------------------------------------------------------
1062 modules modules_install: FORCE
1063 @echo
1064 @echo "The present kernel configuration has modules disabled."
1065 @echo "Type 'make config' and enable loadable module support."
1066 @echo "Then build a kernel with module support enabled."
1067 @echo
1068 @exit 1
1070 endif # CONFIG_MODULES
1073 # Cleaning is done on three levels.
1074 # make clean Delete most generated files
1075 # Leave enough to build external modules
1076 # make mrproper Delete the current configuration, and all generated files
1077 # make distclean Remove editor backup files, patch leftover files and the like
1079 # Directories & files removed with 'make clean'
1080 CLEAN_DIRS += $(MODVERDIR)
1081 CLEAN_FILES += vmlinux System.map \
1082 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1084 # Directories & files removed with 'make mrproper'
1085 MRPROPER_DIRS += include/config include2 usr/include
1086 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1087 include/linux/autoconf.h include/linux/version.h \
1088 include/linux/utsrelease.h \
1089 Module.symvers tags TAGS cscope*
1091 # clean - Delete most, but leave enough to build external modules
1093 clean: rm-dirs := $(CLEAN_DIRS)
1094 clean: rm-files := $(CLEAN_FILES)
1095 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1097 PHONY += $(clean-dirs) clean archclean
1098 $(clean-dirs):
1099 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1101 clean: archclean $(clean-dirs)
1102 $(call cmd,rmdirs)
1103 $(call cmd,rmfiles)
1104 @find . $(RCS_FIND_IGNORE) \
1105 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1106 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1107 -o -name '*.symtypes' \) \
1108 -type f -print | xargs rm -f
1110 # mrproper - Delete all generated files, including .config
1112 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1113 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1114 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1116 PHONY += $(mrproper-dirs) mrproper archmrproper
1117 $(mrproper-dirs):
1118 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1120 mrproper: clean archmrproper $(mrproper-dirs)
1121 $(call cmd,rmdirs)
1122 $(call cmd,rmfiles)
1124 # distclean
1126 PHONY += distclean
1128 distclean: mrproper
1129 @find $(srctree) $(RCS_FIND_IGNORE) \
1130 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1131 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1132 -o -name '.*.rej' -o -size 0 \
1133 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1134 -type f -print | xargs rm -f
1137 # Packaging of the kernel to various formats
1138 # ---------------------------------------------------------------------------
1139 # rpm target kept for backward compatibility
1140 package-dir := $(srctree)/scripts/package
1142 %pkg: include/config/kernel.release FORCE
1143 $(Q)$(MAKE) $(build)=$(package-dir) $@
1144 rpm: include/config/kernel.release FORCE
1145 $(Q)$(MAKE) $(build)=$(package-dir) $@
1148 # Brief documentation of the typical targets used
1149 # ---------------------------------------------------------------------------
1151 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1152 boards := $(notdir $(boards))
1154 help:
1155 @echo 'Cleaning targets:'
1156 @echo ' clean - Remove most generated files but keep the config and'
1157 @echo ' enough build support to build external modules'
1158 @echo ' mrproper - Remove all generated files + config + various backup files'
1159 @echo ' distclean - mrproper + remove editor backup and patch files'
1160 @echo ''
1161 @echo 'Configuration targets:'
1162 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1163 @echo ''
1164 @echo 'Other generic targets:'
1165 @echo ' all - Build all targets marked with [*]'
1166 @echo '* vmlinux - Build the bare kernel'
1167 @echo '* modules - Build all modules'
1168 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1169 @echo ' dir/ - Build all files in dir and below'
1170 @echo ' dir/file.[ois] - Build specified target only'
1171 @echo ' dir/file.ko - Build module including final link'
1172 @echo ' rpm - Build a kernel as an RPM package'
1173 @echo ' tags/TAGS - Generate tags file for editors'
1174 @echo ' cscope - Generate cscope index'
1175 @echo ' kernelrelease - Output the release version string'
1176 @echo ' kernelversion - Output the version stored in Makefile'
1177 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1178 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1179 echo ' (default: $(INSTALL_HDR_PATH))'; \
1181 @echo ''
1182 @echo 'Static analysers'
1183 @echo ' checkstack - Generate a list of stack hogs'
1184 @echo ' namespacecheck - Name space analysis on compiled kernel'
1185 @echo ' includecheck - Check for duplicate included header files'
1186 @echo ' export_report - List the usages of all exported symbols'
1187 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1188 echo ' headers_check - Sanity check on exported headers'; \
1190 @echo ''
1191 @echo 'Kernel packaging:'
1192 @$(MAKE) $(build)=$(package-dir) help
1193 @echo ''
1194 @echo 'Documentation targets:'
1195 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1196 @echo ''
1197 @echo 'Architecture specific targets ($(ARCH)):'
1198 @$(if $(archhelp),$(archhelp),\
1199 echo ' No architecture specific help defined for $(ARCH)')
1200 @echo ''
1201 @$(if $(boards), \
1202 $(foreach b, $(boards), \
1203 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1204 echo '')
1206 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1207 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1208 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1209 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1210 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1211 @echo ''
1212 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1213 @echo 'For further info see the ./README file'
1216 # Documentation targets
1217 # ---------------------------------------------------------------------------
1218 %docs: scripts_basic FORCE
1219 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1221 else # KBUILD_EXTMOD
1224 # External module support.
1225 # When building external modules the kernel used as basis is considered
1226 # read-only, and no consistency checks are made and the make
1227 # system is not used on the basis kernel. If updates are required
1228 # in the basis kernel ordinary make commands (without M=...) must
1229 # be used.
1231 # The following are the only valid targets when building external
1232 # modules.
1233 # make M=dir clean Delete all automatically generated files
1234 # make M=dir modules Make all modules in specified dir
1235 # make M=dir Same as 'make M=dir modules'
1236 # make M=dir modules_install
1237 # Install the modules built in the module directory
1238 # Assumes install directory is already created
1240 # We are always building modules
1241 KBUILD_MODULES := 1
1242 PHONY += crmodverdir
1243 crmodverdir:
1244 $(cmd_crmodverdir)
1246 PHONY += $(objtree)/Module.symvers
1247 $(objtree)/Module.symvers:
1248 @test -e $(objtree)/Module.symvers || ( \
1249 echo; \
1250 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1251 echo " is missing; modules will have no dependencies and modversions."; \
1252 echo )
1254 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1255 PHONY += $(module-dirs) modules
1256 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1257 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1259 modules: $(module-dirs)
1260 @echo ' Building modules, stage 2.';
1261 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1263 PHONY += modules_install
1264 modules_install: _emodinst_ _emodinst_post
1266 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1267 PHONY += _emodinst_
1268 _emodinst_:
1269 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1270 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1272 PHONY += _emodinst_post
1273 _emodinst_post: _emodinst_
1274 $(call cmd,depmod)
1276 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1278 PHONY += $(clean-dirs) clean
1279 $(clean-dirs):
1280 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1282 clean: rm-dirs := $(MODVERDIR)
1283 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1284 clean: $(clean-dirs)
1285 $(call cmd,rmdirs)
1286 $(call cmd,rmfiles)
1287 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1288 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1289 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1290 -type f -print | xargs rm -f
1292 help:
1293 @echo ' Building external modules.'
1294 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1295 @echo ''
1296 @echo ' modules - default target, build the module(s)'
1297 @echo ' modules_install - install the module'
1298 @echo ' clean - remove generated files in module directory only'
1299 @echo ''
1301 # Dummies...
1302 PHONY += prepare scripts
1303 prepare: ;
1304 scripts: ;
1305 endif # KBUILD_EXTMOD
1307 # Generate tags for editors
1308 # ---------------------------------------------------------------------------
1310 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1311 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1312 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1314 ifeq ($(src),$(obj))
1315 __srctree =
1316 else
1317 __srctree = $(srctree)/
1318 endif
1320 ifeq ($(ALLSOURCE_ARCHS),)
1321 ifeq ($(ARCH),um)
1322 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1323 else
1324 ALLINCLUDE_ARCHS := $(SRCARCH)
1325 endif
1326 ALLINCLUDE_ARCHS := $(shell echo $(ALLINCLUDE_ARCHS)|sed -e "s/i386/x86/" -e "s/x86_64/x86/")
1327 else
1328 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1329 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1330 endif
1332 # Take care of arch/x86
1333 ifeq ($(ARCH), $(SRCARCH))
1334 ALLSOURCE_ARCHS := $(ARCH)
1335 else
1336 ALLSOURCE_ARCHS := $(shell echo $(ARCH) $(SRCARCH)|sed -e "s/i386/x86/" -e "s/x86_64/x86/")
1337 endif
1339 define find-sources
1340 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1341 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1342 -name $1 -print; \
1343 done ; \
1344 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1345 -name $1 -print; \
1346 find $(__srctree)include $(RCS_FIND_IGNORE) \
1347 \( -name config -o -name 'asm-*' \) -prune \
1348 -o -name $1 -print; \
1349 for arch in $(ALLINCLUDE_ARCHS) ; do \
1350 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1351 -name $1 -print; \
1352 done ; \
1353 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1354 -name $1 -print; \
1355 find $(__srctree) $(RCS_FIND_IGNORE) \
1356 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1357 -name $1 -print; \
1359 endef
1361 define all-sources
1362 $(call find-sources,'*.[chS]')
1363 endef
1364 define all-kconfigs
1365 $(call find-sources,'Kconfig*')
1366 endef
1367 define all-defconfigs
1368 $(call find-sources,'defconfig')
1369 endef
1371 define xtags
1372 if $1 --version 2>&1 | grep -iq exuberant; then \
1373 $(all-sources) | xargs $1 -a \
1374 -I __initdata,__exitdata,__acquires,__releases \
1375 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1376 --extra=+f --c-kinds=+px \
1377 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1378 $(all-kconfigs) | xargs $1 -a \
1379 --langdef=kconfig \
1380 --language-force=kconfig \
1381 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1382 $(all-defconfigs) | xargs -r $1 -a \
1383 --langdef=dotconfig \
1384 --language-force=dotconfig \
1385 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1386 elif $1 --version 2>&1 | grep -iq emacs; then \
1387 $(all-sources) | xargs $1 -a; \
1388 $(all-kconfigs) | xargs $1 -a \
1389 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1390 $(all-defconfigs) | xargs -r $1 -a \
1391 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1392 else \
1393 $(all-sources) | xargs $1 -a; \
1395 endef
1397 quiet_cmd_cscope-file = FILELST cscope.files
1398 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1400 quiet_cmd_cscope = MAKE cscope.out
1401 cmd_cscope = cscope -b
1403 cscope: FORCE
1404 $(call cmd,cscope-file)
1405 $(call cmd,cscope)
1407 quiet_cmd_TAGS = MAKE $@
1408 define cmd_TAGS
1409 rm -f $@; \
1410 $(call xtags,etags)
1411 endef
1413 TAGS: FORCE
1414 $(call cmd,TAGS)
1416 quiet_cmd_tags = MAKE $@
1417 define cmd_tags
1418 rm -f $@; \
1419 $(call xtags,ctags)
1420 endef
1422 tags: FORCE
1423 $(call cmd,tags)
1426 # Scripts to check various things for consistency
1427 # ---------------------------------------------------------------------------
1429 includecheck:
1430 find * $(RCS_FIND_IGNORE) \
1431 -name '*.[hcS]' -type f -print | sort \
1432 | xargs $(PERL) -w scripts/checkincludes.pl
1434 versioncheck:
1435 find * $(RCS_FIND_IGNORE) \
1436 -name '*.[hcS]' -type f -print | sort \
1437 | xargs $(PERL) -w scripts/checkversion.pl
1439 namespacecheck:
1440 $(PERL) $(srctree)/scripts/namespace.pl
1442 export_report:
1443 $(PERL) $(srctree)/scripts/export_report.pl
1445 endif #ifeq ($(config-targets),1)
1446 endif #ifeq ($(mixed-targets),1)
1448 PHONY += checkstack kernelrelease kernelversion
1450 # UML needs a little special treatment here. It wants to use the host
1451 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1452 # else wants $(ARCH), including people doing cross-builds, which means
1453 # that $(SUBARCH) doesn't work here.
1454 ifeq ($(ARCH), um)
1455 CHECKSTACK_ARCH := $(SUBARCH)
1456 else
1457 CHECKSTACK_ARCH := $(ARCH)
1458 endif
1459 checkstack:
1460 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1461 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1463 kernelrelease:
1464 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1465 $(error kernelrelease not valid - run 'make prepare' to update it))
1466 kernelversion:
1467 @echo $(KERNELVERSION)
1469 # Single targets
1470 # ---------------------------------------------------------------------------
1471 # Single targets are compatible with:
1472 # - build whith mixed source and output
1473 # - build with separate output dir 'make O=...'
1474 # - external modules
1476 # target-dir => where to store outputfile
1477 # build-dir => directory in kernel source tree to use
1479 ifeq ($(KBUILD_EXTMOD),)
1480 build-dir = $(patsubst %/,%,$(dir $@))
1481 target-dir = $(dir $@)
1482 else
1483 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1484 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1485 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1486 endif
1488 %.s: %.c prepare scripts FORCE
1489 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1490 %.i: %.c prepare scripts FORCE
1491 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1492 %.o: %.c prepare scripts FORCE
1493 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1494 %.lst: %.c prepare scripts FORCE
1495 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1496 %.s: %.S prepare scripts FORCE
1497 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1498 %.o: %.S prepare scripts FORCE
1499 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1500 %.symtypes: %.c prepare scripts FORCE
1501 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1503 # Modules
1504 / %/: prepare scripts FORCE
1505 $(cmd_crmodverdir)
1506 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1507 $(build)=$(build-dir)
1508 %.ko: prepare scripts FORCE
1509 $(cmd_crmodverdir)
1510 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1511 $(build)=$(build-dir) $(@:.ko=.o)
1512 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1514 # FIXME Should go into a make.lib or something
1515 # ===========================================================================
1517 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1518 cmd_rmdirs = rm -rf $(rm-dirs)
1520 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1521 cmd_rmfiles = rm -f $(rm-files)
1523 # Run depmod only is we have System.map and depmod is executable
1524 # and we build for the host arch
1525 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1526 cmd_depmod = \
1527 if [ -r System.map -a -x $(DEPMOD) ]; then \
1528 $(DEPMOD) -ae -F System.map \
1529 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1530 $(KERNELRELEASE); \
1533 # Create temporary dir for module support files
1534 # clean it up only when building all modules
1535 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1536 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1538 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1539 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1540 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1542 quiet_cmd_as_o_S = AS $@
1543 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1545 # read all saved command lines
1547 targets := $(wildcard $(sort $(targets)))
1548 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1550 ifneq ($(cmd_files),)
1551 $(cmd_files): ; # Do not try to update included dependency files
1552 include $(cmd_files)
1553 endif
1555 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1556 # Usage:
1557 # $(Q)$(MAKE) $(clean)=dir
1558 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1560 endif # skip-makefile
1562 PHONY += FORCE
1563 FORCE:
1565 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1566 Makefile: ;
1568 # Declare the contents of the .PHONY variable as phony. We keep that
1569 # information in a variable se we can use it in if_changed and friends.
1570 .PHONY: $(PHONY)