debugobjects: add documentation
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / Makefile
blobd3634cd6fe35bde2a8ef73835e9f6f2559087dab
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 25
4 EXTRAVERSION =
5 NAME = Funky Weasel is Jiggy wit it
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 avoids hard-to-debug behaviour);
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 # Cancel implicit rules on top Makefile
112 $(CURDIR)/Makefile Makefile: ;
114 ifneq ($(KBUILD_OUTPUT),)
115 # Invoke a second make in the output directory, passing relevant variables
116 # check that the output directory actually exists
117 saved-output := $(KBUILD_OUTPUT)
118 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119 $(if $(KBUILD_OUTPUT),, \
120 $(error output directory "$(saved-output)" does not exist))
122 PHONY += $(MAKECMDGOALS) sub-make
124 $(filter-out _all sub-make $(CURDIR)/Makefile, $(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.*/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
192 export KBUILD_BUILDHOST := $(SUBARCH)
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 (do not try to remake the file).
295 $(srctree)/scripts/Kbuild.include: ;
296 include $(srctree)/scripts/Kbuild.include
298 # Make variables (CC, etc...)
300 AS = $(CROSS_COMPILE)as
301 LD = $(CROSS_COMPILE)ld
302 CC = $(CROSS_COMPILE)gcc
303 CPP = $(CC) -E
304 AR = $(CROSS_COMPILE)ar
305 NM = $(CROSS_COMPILE)nm
306 STRIP = $(CROSS_COMPILE)strip
307 OBJCOPY = $(CROSS_COMPILE)objcopy
308 OBJDUMP = $(CROSS_COMPILE)objdump
309 AWK = awk
310 GENKSYMS = scripts/genksyms/genksyms
311 DEPMOD = /sbin/depmod
312 KALLSYMS = scripts/kallsyms
313 PERL = perl
314 CHECK = sparse
316 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
317 MODFLAGS = -DMODULE
318 CFLAGS_MODULE = $(MODFLAGS)
319 AFLAGS_MODULE = $(MODFLAGS)
320 LDFLAGS_MODULE =
321 CFLAGS_KERNEL =
322 AFLAGS_KERNEL =
325 # Use LINUXINCLUDE when you must reference the include/ directory.
326 # Needed to be compatible with the O= option
327 LINUXINCLUDE := -Iinclude \
328 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
329 -include include/linux/autoconf.h
331 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
333 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
334 -fno-strict-aliasing -fno-common \
335 -Werror-implicit-function-declaration
336 KBUILD_AFLAGS := -D__ASSEMBLY__
338 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
339 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
340 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
342 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
343 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
344 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
345 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
347 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
348 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
349 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
351 # When compiling out-of-tree modules, put MODVERDIR in the module
352 # tree rather than in the kernel tree. The kernel tree might
353 # even be read-only.
354 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
356 # Files to ignore in find ... statements
358 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
359 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
361 # ===========================================================================
362 # Rules shared between *config targets and build targets
364 # Basic helpers built in scripts/
365 PHONY += scripts_basic
366 scripts_basic:
367 $(Q)$(MAKE) $(build)=scripts/basic
369 # To avoid any implicit rule to kick in, define an empty command.
370 scripts/basic/%: scripts_basic ;
372 PHONY += outputmakefile
373 # outputmakefile generates a Makefile in the output directory, if using a
374 # separate output directory. This allows convenient use of make in the
375 # output directory.
376 outputmakefile:
377 ifneq ($(KBUILD_SRC),)
378 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
379 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
380 endif
382 # To make sure we do not include .config for any of the *config targets
383 # catch them early, and hand them over to scripts/kconfig/Makefile
384 # It is allowed to specify more targets when calling make, including
385 # mixing *config targets and build targets.
386 # For example 'make oldconfig all'.
387 # Detect when mixed targets is specified, and make a second invocation
388 # of make so .config is not included in this case either (for *config).
390 no-dot-config-targets := clean mrproper distclean \
391 cscope TAGS tags help %docs check% \
392 include/linux/version.h headers_% \
393 kernelrelease kernelversion
395 config-targets := 0
396 mixed-targets := 0
397 dot-config := 1
399 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
400 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
401 dot-config := 0
402 endif
403 endif
405 ifeq ($(KBUILD_EXTMOD),)
406 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
407 config-targets := 1
408 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
409 mixed-targets := 1
410 endif
411 endif
412 endif
414 ifeq ($(mixed-targets),1)
415 # ===========================================================================
416 # We're called with mixed targets (*config and build targets).
417 # Handle them one by one.
419 %:: FORCE
420 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
422 else
423 ifeq ($(config-targets),1)
424 # ===========================================================================
425 # *config targets only - make sure prerequisites are updated, and descend
426 # in scripts/kconfig to make the *config target
428 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
429 # KBUILD_DEFCONFIG may point out an alternative default configuration
430 # used for 'make defconfig'
431 include $(srctree)/arch/$(SRCARCH)/Makefile
432 export KBUILD_DEFCONFIG
434 config %config: scripts_basic outputmakefile FORCE
435 $(Q)mkdir -p include/linux include/config
436 $(Q)$(MAKE) $(build)=scripts/kconfig $@
438 else
439 # ===========================================================================
440 # Build targets only - this includes vmlinux, arch specific targets, clean
441 # targets and others. In general all targets except *config targets.
443 ifeq ($(KBUILD_EXTMOD),)
444 # Additional helpers built in scripts/
445 # Carefully list dependencies so we do not try to build scripts twice
446 # in parallel
447 PHONY += scripts
448 scripts: scripts_basic include/config/auto.conf
449 $(Q)$(MAKE) $(build)=$(@)
451 # Objects we will link into vmlinux / subdirs we need to visit
452 init-y := init/
453 drivers-y := drivers/ sound/
454 net-y := net/
455 libs-y := lib/
456 core-y := usr/
457 endif # KBUILD_EXTMOD
459 ifeq ($(dot-config),1)
460 # Read in config
461 -include include/config/auto.conf
463 ifeq ($(KBUILD_EXTMOD),)
464 # Read in dependencies to all Kconfig* files, make sure to run
465 # oldconfig if changes are detected.
466 -include include/config/auto.conf.cmd
468 # To avoid any implicit rule to kick in, define an empty command
469 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
471 # If .config is newer than include/config/auto.conf, someone tinkered
472 # with it and forgot to run make oldconfig.
473 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
474 # we execute the config step to be sure to catch updated Kconfig files
475 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
476 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
477 else
478 # external modules needs include/linux/autoconf.h and include/config/auto.conf
479 # but do not care if they are up-to-date. Use auto.conf to trigger the test
480 PHONY += include/config/auto.conf
482 include/config/auto.conf:
483 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
484 echo; \
485 echo " ERROR: Kernel configuration is invalid."; \
486 echo " include/linux/autoconf.h or $@ are missing."; \
487 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
488 echo; \
489 /bin/false)
491 endif # KBUILD_EXTMOD
493 else
494 # Dummy target needed, because used as prerequisite
495 include/config/auto.conf: ;
496 endif # $(dot-config)
498 # The all: target is the default when no target is given on the
499 # command line.
500 # This allow a user to issue only 'make' to build a kernel including modules
501 # Defaults vmlinux but it is usually overridden in the arch makefile
502 all: vmlinux
504 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
505 KBUILD_CFLAGS += -Os
506 else
507 KBUILD_CFLAGS += -O2
508 endif
510 ifneq (CONFIG_FRAME_WARN,0)
511 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
512 endif
514 # Force gcc to behave correct even for buggy distributions
515 # Arch Makefiles may override this setting
516 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
518 include $(srctree)/arch/$(SRCARCH)/Makefile
520 ifdef CONFIG_FRAME_POINTER
521 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
522 else
523 KBUILD_CFLAGS += -fomit-frame-pointer
524 endif
526 ifdef CONFIG_DEBUG_INFO
527 KBUILD_CFLAGS += -g
528 KBUILD_AFLAGS += -gdwarf-2
529 endif
531 # We trigger additional mismatches with less inlining
532 ifdef CONFIG_DEBUG_SECTION_MISMATCH
533 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
534 endif
536 # arch Makefile may override CC so keep this after arch Makefile is included
537 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
538 CHECKFLAGS += $(NOSTDINC_FLAGS)
540 # warn about C99 declaration after statement
541 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
543 # disable pointer signed / unsigned warnings in gcc 4.0
544 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
546 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
547 # But warn user when we do so
548 warn-assign = \
549 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
551 ifneq ($(KCPPFLAGS),)
552 $(call warn-assign,CPPFLAGS)
553 KBUILD_CPPFLAGS += $(KCPPFLAGS)
554 endif
555 ifneq ($(KAFLAGS),)
556 $(call warn-assign,AFLAGS)
557 KBUILD_AFLAGS += $(KAFLAGS)
558 endif
559 ifneq ($(KCFLAGS),)
560 $(call warn-assign,CFLAGS)
561 KBUILD_CFLAGS += $(KCFLAGS)
562 endif
564 # Use --build-id when available.
565 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
566 $(call ld-option, -Wl$(comma)--build-id,))
567 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
568 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
570 # Default kernel image to build when no specific target is given.
571 # KBUILD_IMAGE may be overruled on the command line or
572 # set in the environment
573 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
574 # this default value
575 export KBUILD_IMAGE ?= vmlinux
578 # INSTALL_PATH specifies where to place the updated kernel and system map
579 # images. Default is /boot, but you can set it to other values
580 export INSTALL_PATH ?= /boot
583 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
584 # relocations required by build roots. This is not defined in the
585 # makefile but the argument can be passed to make if needed.
588 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
589 export MODLIB
592 # INSTALL_MOD_STRIP, if defined, will cause modules to be
593 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
594 # the default option --strip-debug will be used. Otherwise,
595 # INSTALL_MOD_STRIP will used as the options to the strip command.
597 ifdef INSTALL_MOD_STRIP
598 ifeq ($(INSTALL_MOD_STRIP),1)
599 mod_strip_cmd = $(STRIP) --strip-debug
600 else
601 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
602 endif # INSTALL_MOD_STRIP=1
603 else
604 mod_strip_cmd = true
605 endif # INSTALL_MOD_STRIP
606 export mod_strip_cmd
609 ifeq ($(KBUILD_EXTMOD),)
610 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
612 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
613 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
614 $(net-y) $(net-m) $(libs-y) $(libs-m)))
616 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
617 $(init-n) $(init-) \
618 $(core-n) $(core-) $(drivers-n) $(drivers-) \
619 $(net-n) $(net-) $(libs-n) $(libs-))))
621 init-y := $(patsubst %/, %/built-in.o, $(init-y))
622 core-y := $(patsubst %/, %/built-in.o, $(core-y))
623 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
624 net-y := $(patsubst %/, %/built-in.o, $(net-y))
625 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
626 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
627 libs-y := $(libs-y1) $(libs-y2)
629 # Build vmlinux
630 # ---------------------------------------------------------------------------
631 # vmlinux is built from the objects selected by $(vmlinux-init) and
632 # $(vmlinux-main). Most are built-in.o files from top-level directories
633 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
634 # Ordering when linking is important, and $(vmlinux-init) must be first.
636 # vmlinux
639 # +-< $(vmlinux-init)
640 # | +--< init/version.o + more
642 # +--< $(vmlinux-main)
643 # | +--< driver/built-in.o mm/built-in.o + more
645 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
647 # vmlinux version (uname -v) cannot be updated during normal
648 # descending-into-subdirs phase since we do not yet know if we need to
649 # update vmlinux.
650 # Therefore this step is delayed until just before final link of vmlinux -
651 # except in the kallsyms case where it is done just before adding the
652 # symbols to the kernel.
654 # System.map is generated to document addresses of all kernel symbols
656 vmlinux-init := $(head-y) $(init-y)
657 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
658 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
659 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
660 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
662 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
663 # May be overridden by arch/$(ARCH)/Makefile
664 quiet_cmd_vmlinux__ ?= LD $@
665 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
666 -T $(vmlinux-lds) $(vmlinux-init) \
667 --start-group $(vmlinux-main) --end-group \
668 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
670 # Generate new vmlinux version
671 quiet_cmd_vmlinux_version = GEN .version
672 cmd_vmlinux_version = set -e; \
673 if [ ! -r .version ]; then \
674 rm -f .version; \
675 echo 1 >.version; \
676 else \
677 mv .version .old_version; \
678 expr 0$$(cat .old_version) + 1 >.version; \
679 fi; \
680 $(MAKE) $(build)=init
682 # Generate System.map
683 quiet_cmd_sysmap = SYSMAP
684 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
686 # Link of vmlinux
687 # If CONFIG_KALLSYMS is set .version is already updated
688 # Generate System.map and verify that the content is consistent
689 # Use + in front of the vmlinux_version rule to silent warning with make -j2
690 # First command is ':' to allow us to use + in front of the rule
691 define rule_vmlinux__
693 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
695 $(call cmd,vmlinux__)
696 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
698 $(Q)$(if $($(quiet)cmd_sysmap), \
699 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
700 $(cmd_sysmap) $@ System.map; \
701 if [ $$? -ne 0 ]; then \
702 rm -f $@; \
703 /bin/false; \
705 $(verify_kallsyms)
706 endef
709 ifdef CONFIG_KALLSYMS
710 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
711 # It's a three stage process:
712 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
713 # empty
714 # Running kallsyms on that gives us .tmp_kallsyms1.o with
715 # the right size - vmlinux version (uname -v) is updated during this step
716 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
717 # but due to the added section, some addresses have shifted.
718 # From here, we generate a correct .tmp_kallsyms2.o
719 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
720 # o Verify that the System.map from vmlinux matches the map from
721 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
722 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
723 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
724 # temporary bypass to allow the kernel to be built while the
725 # maintainers work out what went wrong with kallsyms.
727 ifdef CONFIG_KALLSYMS_EXTRA_PASS
728 last_kallsyms := 3
729 else
730 last_kallsyms := 2
731 endif
733 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
735 define verify_kallsyms
736 $(Q)$(if $($(quiet)cmd_sysmap), \
737 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
738 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
739 $(Q)cmp -s System.map .tmp_System.map || \
740 (echo Inconsistent kallsyms data; \
741 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
742 rm .tmp_kallsyms* ; /bin/false )
743 endef
745 # Update vmlinux version before link
746 # Use + in front of this rule to silent warning about make -j1
747 # First command is ':' to allow us to use + in front of this rule
748 cmd_ksym_ld = $(cmd_vmlinux__)
749 define rule_ksym_ld
751 +$(call cmd,vmlinux_version)
752 $(call cmd,vmlinux__)
753 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
754 endef
756 # Generate .S file with all kernel symbols
757 quiet_cmd_kallsyms = KSYM $@
758 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
759 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
761 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
762 $(call if_changed_dep,as_o_S)
764 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
765 $(call cmd,kallsyms)
767 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
768 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
769 $(call if_changed_rule,ksym_ld)
771 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
772 $(call if_changed,vmlinux__)
774 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
775 $(call if_changed,vmlinux__)
777 # Needs to visit scripts/ before $(KALLSYMS) can be used.
778 $(KALLSYMS): scripts ;
780 # Generate some data for debugging strange kallsyms problems
781 debug_kallsyms: .tmp_map$(last_kallsyms)
783 .tmp_map%: .tmp_vmlinux% FORCE
784 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
786 .tmp_map3: .tmp_map2
788 .tmp_map2: .tmp_map1
790 endif # ifdef CONFIG_KALLSYMS
792 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
793 # relevant sections renamed as per the linker script.
794 quiet_cmd_vmlinux-modpost = LD $@
795 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
796 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
797 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
798 define rule_vmlinux-modpost
800 +$(call cmd,vmlinux-modpost)
801 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
802 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
803 endef
805 # vmlinux image - including updated kernel symbols
806 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
807 ifdef CONFIG_HEADERS_CHECK
808 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
809 endif
810 ifdef CONFIG_SAMPLES
811 $(Q)$(MAKE) $(build)=samples
812 endif
813 $(call vmlinux-modpost)
814 $(call if_changed_rule,vmlinux__)
815 $(Q)rm -f .old_version
817 # build vmlinux.o first to catch section mismatch errors early
818 ifdef CONFIG_KALLSYMS
819 .tmp_vmlinux1: vmlinux.o
820 endif
821 vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE
822 $(call if_changed_rule,vmlinux-modpost)
824 # The actual objects are generated when descending,
825 # make sure no implicit rule kicks in
826 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
828 # Handle descending into subdirectories listed in $(vmlinux-dirs)
829 # Preset locale variables to speed up the build process. Limit locale
830 # tweaks to this spot to avoid wrong language settings when running
831 # make menuconfig etc.
832 # Error messages still appears in the original language
834 PHONY += $(vmlinux-dirs)
835 $(vmlinux-dirs): prepare scripts
836 $(Q)$(MAKE) $(build)=$@
838 # Build the kernel release string
840 # The KERNELRELEASE value built here is stored in the file
841 # include/config/kernel.release, and is used when executing several
842 # make targets, such as "make install" or "make modules_install."
844 # The eventual kernel release string consists of the following fields,
845 # shown in a hierarchical format to show how smaller parts are concatenated
846 # to form the larger and final value, with values coming from places like
847 # the Makefile, kernel config options, make command line options and/or
848 # SCM tag information.
850 # $(KERNELVERSION)
851 # $(VERSION) eg, 2
852 # $(PATCHLEVEL) eg, 6
853 # $(SUBLEVEL) eg, 18
854 # $(EXTRAVERSION) eg, -rc6
855 # $(localver-full)
856 # $(localver)
857 # localversion* (files without backups, containing '~')
858 # $(CONFIG_LOCALVERSION) (from kernel config setting)
859 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
860 # ./scripts/setlocalversion (SCM tag, if one exists)
861 # $(LOCALVERSION) (from make command line if provided)
863 # Note how the final $(localver-auto) string is included *only* if the
864 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
865 # moment, only git is supported but other SCMs can edit the script
866 # scripts/setlocalversion and add the appropriate checks as needed.
868 pattern = ".*/localversion[^~]*"
869 string = $(shell cat /dev/null \
870 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
872 localver = $(subst $(space),, $(string) \
873 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
875 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
876 # and if the SCM is know a tag from the SCM is appended.
877 # The appended tag is determined by the SCM used.
879 # Currently, only git is supported.
880 # Other SCMs can edit scripts/setlocalversion and add the appropriate
881 # checks as needed.
882 ifdef CONFIG_LOCALVERSION_AUTO
883 _localver-auto = $(shell $(CONFIG_SHELL) \
884 $(srctree)/scripts/setlocalversion $(srctree))
885 localver-auto = $(LOCALVERSION)$(_localver-auto)
886 endif
888 localver-full = $(localver)$(localver-auto)
890 # Store (new) KERNELRELASE string in include/config/kernel.release
891 kernelrelease = $(KERNELVERSION)$(localver-full)
892 include/config/kernel.release: include/config/auto.conf FORCE
893 $(Q)rm -f $@
894 $(Q)echo $(kernelrelease) > $@
897 # Things we need to do before we recursively start building the kernel
898 # or the modules are listed in "prepare".
899 # A multi level approach is used. prepareN is processed before prepareN-1.
900 # archprepare is used in arch Makefiles and when processed asm symlink,
901 # version.h and scripts_basic is processed / created.
903 # Listed in dependency order
904 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
906 # prepare3 is used to check if we are building in a separate output directory,
907 # and if so do:
908 # 1) Check that make has not been executed in the kernel src $(srctree)
909 # 2) Create the include2 directory, used for the second asm symlink
910 prepare3: include/config/kernel.release
911 ifneq ($(KBUILD_SRC),)
912 @echo ' Using $(srctree) as source for kernel'
913 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
914 echo " $(srctree) is not clean, please run 'make mrproper'";\
915 echo " in the '$(srctree)' directory.";\
916 /bin/false; \
918 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
919 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
920 endif
922 # prepare2 creates a makefile if using a separate output directory
923 prepare2: prepare3 outputmakefile
925 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
926 include/asm include/config/auto.conf
927 $(cmd_crmodverdir)
929 archprepare: prepare1 scripts_basic
931 prepare0: archprepare FORCE
932 $(Q)$(MAKE) $(build)=.
933 $(Q)$(MAKE) $(build)=. missing-syscalls
935 # All the preparing..
936 prepare: prepare0
938 # Leave this as default for preprocessing vmlinux.lds.S, which is now
939 # done in arch/$(ARCH)/kernel/Makefile
941 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
943 # The asm symlink changes when $(ARCH) changes.
944 # Detect this and ask user to run make mrproper
946 include/asm: FORCE
947 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
948 if [ -L include/asm ]; then \
949 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
950 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
951 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
952 exit 1; \
953 fi; \
954 else \
955 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
956 if [ ! -d include ]; then \
957 mkdir -p include; \
958 fi; \
959 ln -fsn asm-$(SRCARCH) $@; \
962 # Generate some files
963 # ---------------------------------------------------------------------------
965 # KERNELRELEASE can change from a few different places, meaning version.h
966 # needs to be updated, so this check is forced on all builds
968 uts_len := 64
969 define filechk_utsrelease.h
970 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
971 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
972 exit 1; \
973 fi; \
974 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
975 endef
977 define filechk_version.h
978 (echo \#define LINUX_VERSION_CODE $(shell \
979 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
980 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
981 endef
983 include/linux/version.h: $(srctree)/Makefile FORCE
984 $(call filechk,version.h)
986 include/linux/utsrelease.h: include/config/kernel.release FORCE
987 $(call filechk,utsrelease.h)
989 # ---------------------------------------------------------------------------
991 PHONY += depend dep
992 depend dep:
993 @echo '*** Warning: make $@ is unnecessary now.'
995 # ---------------------------------------------------------------------------
996 # Kernel headers
997 INSTALL_HDR_PATH=$(objtree)/usr
998 export INSTALL_HDR_PATH
1000 HDRFILTER=generic i386 x86_64
1001 HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
1003 PHONY += headers_install_all
1004 headers_install_all: include/linux/version.h scripts_basic FORCE
1005 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1006 $(Q)for arch in $(HDRARCHES); do \
1007 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
1008 done
1010 PHONY += headers_install
1011 headers_install: include/linux/version.h scripts_basic FORCE
1012 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1013 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
1014 exit 1 ; fi
1015 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1016 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
1018 PHONY += headers_check_all
1019 headers_check_all: headers_install_all
1020 $(Q)for arch in $(HDRARCHES); do \
1021 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1022 done
1024 PHONY += headers_check
1025 headers_check: headers_install
1026 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
1028 # ---------------------------------------------------------------------------
1029 # Modules
1031 ifdef CONFIG_MODULES
1033 # By default, build modules as well
1035 all: modules
1037 # Build modules
1039 # A module can be listed more than once in obj-m resulting in
1040 # duplicate lines in modules.order files. Those are removed
1041 # using awk while concatenating to the final file.
1043 PHONY += modules
1044 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1045 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1046 @echo ' Building modules, stage 2.';
1047 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1050 # Target to prepare building external modules
1051 PHONY += modules_prepare
1052 modules_prepare: prepare scripts
1054 # Target to install modules
1055 PHONY += modules_install
1056 modules_install: _modinst_ _modinst_post
1058 PHONY += _modinst_
1059 _modinst_:
1060 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1061 echo "Warning: you may need to install module-init-tools"; \
1062 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1063 sleep 1; \
1065 @rm -rf $(MODLIB)/kernel
1066 @rm -f $(MODLIB)/source
1067 @mkdir -p $(MODLIB)/kernel
1068 @ln -s $(srctree) $(MODLIB)/source
1069 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1070 rm -f $(MODLIB)/build ; \
1071 ln -s $(objtree) $(MODLIB)/build ; \
1073 @cp -f $(objtree)/modules.order $(MODLIB)/
1074 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1076 # This depmod is only for convenience to give the initial
1077 # boot a modules.dep even before / is mounted read-write. However the
1078 # boot script depmod is the master version.
1079 PHONY += _modinst_post
1080 _modinst_post: _modinst_
1081 $(call cmd,depmod)
1083 else # CONFIG_MODULES
1085 # Modules not configured
1086 # ---------------------------------------------------------------------------
1088 modules modules_install: FORCE
1089 @echo
1090 @echo "The present kernel configuration has modules disabled."
1091 @echo "Type 'make config' and enable loadable module support."
1092 @echo "Then build a kernel with module support enabled."
1093 @echo
1094 @exit 1
1096 endif # CONFIG_MODULES
1099 # Cleaning is done on three levels.
1100 # make clean Delete most generated files
1101 # Leave enough to build external modules
1102 # make mrproper Delete the current configuration, and all generated files
1103 # make distclean Remove editor backup files, patch leftover files and the like
1105 # Directories & files removed with 'make clean'
1106 CLEAN_DIRS += $(MODVERDIR)
1107 CLEAN_FILES += vmlinux System.map \
1108 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1110 # Directories & files removed with 'make mrproper'
1111 MRPROPER_DIRS += include/config include2 usr/include
1112 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1113 include/linux/autoconf.h include/linux/version.h \
1114 include/linux/utsrelease.h \
1115 Module.symvers tags TAGS cscope*
1117 # clean - Delete most, but leave enough to build external modules
1119 clean: rm-dirs := $(CLEAN_DIRS)
1120 clean: rm-files := $(CLEAN_FILES)
1121 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1123 PHONY += $(clean-dirs) clean archclean
1124 $(clean-dirs):
1125 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1127 clean: archclean $(clean-dirs)
1128 $(call cmd,rmdirs)
1129 $(call cmd,rmfiles)
1130 @find . $(RCS_FIND_IGNORE) \
1131 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1132 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1133 -o -name '*.symtypes' -o -name 'modules.order' \) \
1134 -type f -print | xargs rm -f
1136 # mrproper - Delete all generated files, including .config
1138 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1139 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1140 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1142 PHONY += $(mrproper-dirs) mrproper archmrproper
1143 $(mrproper-dirs):
1144 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1146 mrproper: clean archmrproper $(mrproper-dirs)
1147 $(call cmd,rmdirs)
1148 $(call cmd,rmfiles)
1150 # distclean
1152 PHONY += distclean
1154 distclean: mrproper
1155 @find $(srctree) $(RCS_FIND_IGNORE) \
1156 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1157 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1158 -o -name '.*.rej' -o -size 0 \
1159 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1160 -type f -print | xargs rm -f
1163 # Packaging of the kernel to various formats
1164 # ---------------------------------------------------------------------------
1165 # rpm target kept for backward compatibility
1166 package-dir := $(srctree)/scripts/package
1168 %pkg: include/config/kernel.release FORCE
1169 $(Q)$(MAKE) $(build)=$(package-dir) $@
1170 rpm: include/config/kernel.release FORCE
1171 $(Q)$(MAKE) $(build)=$(package-dir) $@
1174 # Brief documentation of the typical targets used
1175 # ---------------------------------------------------------------------------
1177 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1178 boards := $(notdir $(boards))
1179 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1180 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1182 help:
1183 @echo 'Cleaning targets:'
1184 @echo ' clean - Remove most generated files but keep the config and'
1185 @echo ' enough build support to build external modules'
1186 @echo ' mrproper - Remove all generated files + config + various backup files'
1187 @echo ' distclean - mrproper + remove editor backup and patch files'
1188 @echo ''
1189 @echo 'Configuration targets:'
1190 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1191 @echo ''
1192 @echo 'Other generic targets:'
1193 @echo ' all - Build all targets marked with [*]'
1194 @echo '* vmlinux - Build the bare kernel'
1195 @echo '* modules - Build all modules'
1196 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1197 @echo ' dir/ - Build all files in dir and below'
1198 @echo ' dir/file.[ois] - Build specified target only'
1199 @echo ' dir/file.ko - Build module including final link'
1200 @echo ' prepare - Set up for building external modules'
1201 @echo ' tags/TAGS - Generate tags file for editors'
1202 @echo ' cscope - Generate cscope index'
1203 @echo ' kernelrelease - Output the release version string'
1204 @echo ' kernelversion - Output the version stored in Makefile'
1205 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1206 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1207 echo ' (default: $(INSTALL_HDR_PATH))'; \
1209 @echo ''
1210 @echo 'Static analysers'
1211 @echo ' checkstack - Generate a list of stack hogs'
1212 @echo ' namespacecheck - Name space analysis on compiled kernel'
1213 @echo ' versioncheck - Sanity check on version.h usage'
1214 @echo ' includecheck - Check for duplicate included header files'
1215 @echo ' export_report - List the usages of all exported symbols'
1216 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1217 echo ' headers_check - Sanity check on exported headers'; \
1219 @echo ''
1220 @echo 'Kernel packaging:'
1221 @$(MAKE) $(build)=$(package-dir) help
1222 @echo ''
1223 @echo 'Documentation targets:'
1224 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1225 @echo ''
1226 @echo 'Architecture specific targets ($(SRCARCH)):'
1227 @$(if $(archhelp),$(archhelp),\
1228 echo ' No architecture specific help defined for $(SRCARCH)')
1229 @echo ''
1230 @$(if $(boards), \
1231 $(foreach b, $(boards), \
1232 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1233 echo '')
1234 @$(if $(board-dirs), \
1235 $(foreach b, $(board-dirs), \
1236 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1237 printf " %-16s - Show all of the above\\n" help-boards; \
1238 echo '')
1240 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1241 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1242 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1243 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1244 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1245 @echo ''
1246 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1247 @echo 'For further info see the ./README file'
1250 help-board-dirs := $(addprefix help-,$(board-dirs))
1252 help-boards: $(help-board-dirs)
1254 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1256 $(help-board-dirs): help-%:
1257 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1258 @$(if $(boards-per-dir), \
1259 $(foreach b, $(boards-per-dir), \
1260 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1261 echo '')
1264 # Documentation targets
1265 # ---------------------------------------------------------------------------
1266 %docs: scripts_basic FORCE
1267 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1269 else # KBUILD_EXTMOD
1272 # External module support.
1273 # When building external modules the kernel used as basis is considered
1274 # read-only, and no consistency checks are made and the make
1275 # system is not used on the basis kernel. If updates are required
1276 # in the basis kernel ordinary make commands (without M=...) must
1277 # be used.
1279 # The following are the only valid targets when building external
1280 # modules.
1281 # make M=dir clean Delete all automatically generated files
1282 # make M=dir modules Make all modules in specified dir
1283 # make M=dir Same as 'make M=dir modules'
1284 # make M=dir modules_install
1285 # Install the modules built in the module directory
1286 # Assumes install directory is already created
1288 # We are always building modules
1289 KBUILD_MODULES := 1
1290 PHONY += crmodverdir
1291 crmodverdir:
1292 $(cmd_crmodverdir)
1294 PHONY += $(objtree)/Module.symvers
1295 $(objtree)/Module.symvers:
1296 @test -e $(objtree)/Module.symvers || ( \
1297 echo; \
1298 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1299 echo " is missing; modules will have no dependencies and modversions."; \
1300 echo )
1302 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1303 PHONY += $(module-dirs) modules
1304 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1305 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1307 modules: $(module-dirs)
1308 @echo ' Building modules, stage 2.';
1309 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1311 PHONY += modules_install
1312 modules_install: _emodinst_ _emodinst_post
1314 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1315 PHONY += _emodinst_
1316 _emodinst_:
1317 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1318 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1320 PHONY += _emodinst_post
1321 _emodinst_post: _emodinst_
1322 $(call cmd,depmod)
1324 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1326 PHONY += $(clean-dirs) clean
1327 $(clean-dirs):
1328 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1330 clean: rm-dirs := $(MODVERDIR)
1331 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1332 clean: $(clean-dirs)
1333 $(call cmd,rmdirs)
1334 $(call cmd,rmfiles)
1335 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1336 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1337 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1338 -type f -print | xargs rm -f
1340 help:
1341 @echo ' Building external modules.'
1342 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1343 @echo ''
1344 @echo ' modules - default target, build the module(s)'
1345 @echo ' modules_install - install the module'
1346 @echo ' clean - remove generated files in module directory only'
1347 @echo ''
1349 # Dummies...
1350 PHONY += prepare scripts
1351 prepare: ;
1352 scripts: ;
1353 endif # KBUILD_EXTMOD
1355 # Generate tags for editors
1356 # ---------------------------------------------------------------------------
1358 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1359 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1360 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1362 ifeq ($(src),$(obj))
1363 __srctree =
1364 else
1365 __srctree = $(srctree)/
1366 endif
1368 ifeq ($(ALLSOURCE_ARCHS),)
1369 ifeq ($(ARCH),um)
1370 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1371 else
1372 ALLINCLUDE_ARCHS := $(SRCARCH)
1373 endif
1374 else
1375 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1376 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1377 endif
1379 ALLSOURCE_ARCHS := $(SRCARCH)
1381 define find-sources
1382 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1383 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1384 -name $1 -print; \
1385 done ; \
1386 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1387 -name $1 -print; \
1388 find $(__srctree)include $(RCS_FIND_IGNORE) \
1389 \( -name config -o -name 'asm-*' \) -prune \
1390 -o -name $1 -print; \
1391 for arch in $(ALLINCLUDE_ARCHS) ; do \
1392 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1393 -name $1 -print; \
1394 done ; \
1395 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1396 -name $1 -print; \
1397 find $(__srctree) $(RCS_FIND_IGNORE) \
1398 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1399 -name $1 -print; \
1401 endef
1403 define all-sources
1404 $(call find-sources,'*.[chS]')
1405 endef
1406 define all-kconfigs
1407 $(call find-sources,'Kconfig*')
1408 endef
1409 define all-defconfigs
1410 $(call find-sources,'defconfig')
1411 endef
1413 define xtags
1414 if $1 --version 2>&1 | grep -iq exuberant; then \
1415 $(all-sources) | xargs $1 -a \
1416 -I __initdata,__exitdata,__acquires,__releases \
1417 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1418 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1419 --extra=+f --c-kinds=+px \
1420 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1421 $(all-kconfigs) | xargs $1 -a \
1422 --langdef=kconfig \
1423 --language-force=kconfig \
1424 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
1425 $(all-defconfigs) | xargs -r $1 -a \
1426 --langdef=dotconfig \
1427 --language-force=dotconfig \
1428 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1429 elif $1 --version 2>&1 | grep -iq emacs; then \
1430 $(all-sources) | xargs $1 -a; \
1431 $(all-kconfigs) | xargs $1 -a \
1432 --regex='/^[ \t]*(menu|)config[ \t]+\([a-zA-Z0-9_]+\)/\2/'; \
1433 $(all-defconfigs) | xargs -r $1 -a \
1434 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1435 else \
1436 $(all-sources) | xargs $1 -a; \
1438 endef
1440 quiet_cmd_cscope-file = FILELST cscope.files
1441 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1443 quiet_cmd_cscope = MAKE cscope.out
1444 cmd_cscope = cscope -b
1446 cscope: FORCE
1447 $(call cmd,cscope-file)
1448 $(call cmd,cscope)
1450 quiet_cmd_TAGS = MAKE $@
1451 define cmd_TAGS
1452 rm -f $@; \
1453 $(call xtags,etags)
1454 endef
1456 TAGS: FORCE
1457 $(call cmd,TAGS)
1459 quiet_cmd_tags = MAKE $@
1460 define cmd_tags
1461 rm -f $@; \
1462 $(call xtags,ctags)
1463 endef
1465 tags: FORCE
1466 $(call cmd,tags)
1469 # Scripts to check various things for consistency
1470 # ---------------------------------------------------------------------------
1472 includecheck:
1473 find * $(RCS_FIND_IGNORE) \
1474 -name '*.[hcS]' -type f -print | sort \
1475 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1477 versioncheck:
1478 find * $(RCS_FIND_IGNORE) \
1479 -name '*.[hcS]' -type f -print | sort \
1480 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1482 namespacecheck:
1483 $(PERL) $(srctree)/scripts/namespace.pl
1485 export_report:
1486 $(PERL) $(srctree)/scripts/export_report.pl
1488 endif #ifeq ($(config-targets),1)
1489 endif #ifeq ($(mixed-targets),1)
1491 PHONY += checkstack kernelrelease kernelversion
1493 # UML needs a little special treatment here. It wants to use the host
1494 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1495 # else wants $(ARCH), including people doing cross-builds, which means
1496 # that $(SUBARCH) doesn't work here.
1497 ifeq ($(ARCH), um)
1498 CHECKSTACK_ARCH := $(SUBARCH)
1499 else
1500 CHECKSTACK_ARCH := $(ARCH)
1501 endif
1502 checkstack:
1503 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1504 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1506 kernelrelease:
1507 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1508 $(error kernelrelease not valid - run 'make prepare' to update it))
1509 kernelversion:
1510 @echo $(KERNELVERSION)
1512 # Single targets
1513 # ---------------------------------------------------------------------------
1514 # Single targets are compatible with:
1515 # - build with mixed source and output
1516 # - build with separate output dir 'make O=...'
1517 # - external modules
1519 # target-dir => where to store outputfile
1520 # build-dir => directory in kernel source tree to use
1522 ifeq ($(KBUILD_EXTMOD),)
1523 build-dir = $(patsubst %/,%,$(dir $@))
1524 target-dir = $(dir $@)
1525 else
1526 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1527 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1528 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1529 endif
1531 %.s: %.c prepare scripts FORCE
1532 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1533 %.i: %.c prepare scripts FORCE
1534 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1535 %.o: %.c prepare scripts FORCE
1536 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1537 %.lst: %.c prepare scripts FORCE
1538 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1539 %.s: %.S prepare scripts FORCE
1540 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1541 %.o: %.S prepare scripts FORCE
1542 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1543 %.symtypes: %.c prepare scripts FORCE
1544 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1546 # Modules
1547 / %/: prepare scripts FORCE
1548 $(cmd_crmodverdir)
1549 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1550 $(build)=$(build-dir)
1551 %.ko: prepare scripts FORCE
1552 $(cmd_crmodverdir)
1553 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1554 $(build)=$(build-dir) $(@:.ko=.o)
1555 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1557 # FIXME Should go into a make.lib or something
1558 # ===========================================================================
1560 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1561 cmd_rmdirs = rm -rf $(rm-dirs)
1563 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1564 cmd_rmfiles = rm -f $(rm-files)
1566 # Run depmod only if we have System.map and depmod is executable
1567 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1568 cmd_depmod = \
1569 if [ -r System.map -a -x $(DEPMOD) ]; then \
1570 $(DEPMOD) -ae -F System.map \
1571 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1572 $(KERNELRELEASE); \
1575 # Create temporary dir for module support files
1576 # clean it up only when building all modules
1577 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1578 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1580 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1581 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1582 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1584 quiet_cmd_as_o_S = AS $@
1585 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1587 # read all saved command lines
1589 targets := $(wildcard $(sort $(targets)))
1590 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1592 ifneq ($(cmd_files),)
1593 $(cmd_files): ; # Do not try to update included dependency files
1594 include $(cmd_files)
1595 endif
1597 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1598 # Usage:
1599 # $(Q)$(MAKE) $(clean)=dir
1600 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1602 endif # skip-makefile
1604 PHONY += FORCE
1605 FORCE:
1607 # Declare the contents of the .PHONY variable as phony. We keep that
1608 # information in a variable se we can use it in if_changed and friends.
1609 .PHONY: $(PHONY)