ACPI/PCI: remove obsolete _OSC capability support functions
[linux-2.6/mini2440.git] / Makefile
blobf9006663f01e428ec13a39fb215914e750ab66de
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 28
4 EXTRAVERSION =
5 NAME = Erotic Pickled Herring
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 ($(ARCH),x86_64)
205 SRCARCH := x86
206 endif
208 # Additional ARCH settings for sparc
209 ifeq ($(ARCH),sparc64)
210 SRCARCH := sparc
211 endif
213 # Where to locate arch specific headers
214 hdr-arch := $(SRCARCH)
216 KCONFIG_CONFIG ?= .config
218 # SHELL used by kbuild
219 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
220 else if [ -x /bin/bash ]; then echo /bin/bash; \
221 else echo sh; fi ; fi)
223 HOSTCC = gcc
224 HOSTCXX = g++
225 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
226 HOSTCXXFLAGS = -O2
228 # Decide whether to build built-in, modular, or both.
229 # Normally, just do built-in.
231 KBUILD_MODULES :=
232 KBUILD_BUILTIN := 1
234 # If we have only "make modules", don't compile built-in objects.
235 # When we're building modules with modversions, we need to consider
236 # the built-in objects during the descend as well, in order to
237 # make sure the checksums are up to date before we record them.
239 ifeq ($(MAKECMDGOALS),modules)
240 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
241 endif
243 # If we have "make <whatever> modules", compile modules
244 # in addition to whatever we do anyway.
245 # Just "make" or "make all" shall build modules as well
247 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
248 KBUILD_MODULES := 1
249 endif
251 ifeq ($(MAKECMDGOALS),)
252 KBUILD_MODULES := 1
253 endif
255 export KBUILD_MODULES KBUILD_BUILTIN
256 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
258 # Beautify output
259 # ---------------------------------------------------------------------------
261 # Normally, we echo the whole command before executing it. By making
262 # that echo $($(quiet)$(cmd)), we now have the possibility to set
263 # $(quiet) to choose other forms of output instead, e.g.
265 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
266 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
268 # If $(quiet) is empty, the whole command will be printed.
269 # If it is set to "quiet_", only the short version will be printed.
270 # If it is set to "silent_", nothing will be printed at all, since
271 # the variable $(silent_cmd_cc_o_c) doesn't exist.
273 # A simple variant is to prefix commands with $(Q) - that's useful
274 # for commands that shall be hidden in non-verbose mode.
276 # $(Q)ln $@ :<
278 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
279 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
281 ifeq ($(KBUILD_VERBOSE),1)
282 quiet =
284 else
285 quiet=quiet_
286 Q = @
287 endif
289 # If the user is running make -s (silent mode), suppress echoing of
290 # commands
292 ifneq ($(findstring s,$(MAKEFLAGS)),)
293 quiet=silent_
294 endif
296 export quiet Q KBUILD_VERBOSE
299 # Look for make include files relative to root of kernel src
300 MAKEFLAGS += --include-dir=$(srctree)
302 # We need some generic definitions (do not try to remake the file).
303 $(srctree)/scripts/Kbuild.include: ;
304 include $(srctree)/scripts/Kbuild.include
306 # Make variables (CC, etc...)
308 AS = $(CROSS_COMPILE)as
309 LD = $(CROSS_COMPILE)ld
310 CC = $(CROSS_COMPILE)gcc
311 CPP = $(CC) -E
312 AR = $(CROSS_COMPILE)ar
313 NM = $(CROSS_COMPILE)nm
314 STRIP = $(CROSS_COMPILE)strip
315 OBJCOPY = $(CROSS_COMPILE)objcopy
316 OBJDUMP = $(CROSS_COMPILE)objdump
317 AWK = awk
318 GENKSYMS = scripts/genksyms/genksyms
319 DEPMOD = /sbin/depmod
320 KALLSYMS = scripts/kallsyms
321 PERL = perl
322 CHECK = sparse
324 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
325 -Wbitwise -Wno-return-void $(CF)
326 MODFLAGS = -DMODULE
327 CFLAGS_MODULE = $(MODFLAGS)
328 AFLAGS_MODULE = $(MODFLAGS)
329 LDFLAGS_MODULE =
330 CFLAGS_KERNEL =
331 AFLAGS_KERNEL =
334 # Use LINUXINCLUDE when you must reference the include/ directory.
335 # Needed to be compatible with the O= option
336 LINUXINCLUDE := -Iinclude \
337 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
338 -I$(srctree)/arch/$(hdr-arch)/include \
339 -include include/linux/autoconf.h
341 KBUILD_CPPFLAGS := -D__KERNEL__
343 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
344 -fno-strict-aliasing -fno-common \
345 -Werror-implicit-function-declaration
346 KBUILD_AFLAGS := -D__ASSEMBLY__
348 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
349 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
350 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
352 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
353 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
354 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
355 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
357 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
358 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
359 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
361 # When compiling out-of-tree modules, put MODVERDIR in the module
362 # tree rather than in the kernel tree. The kernel tree might
363 # even be read-only.
364 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
366 # Files to ignore in find ... statements
368 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
369 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
371 # ===========================================================================
372 # Rules shared between *config targets and build targets
374 # Basic helpers built in scripts/
375 PHONY += scripts_basic
376 scripts_basic:
377 $(Q)$(MAKE) $(build)=scripts/basic
379 # To avoid any implicit rule to kick in, define an empty command.
380 scripts/basic/%: scripts_basic ;
382 PHONY += outputmakefile
383 # outputmakefile generates a Makefile in the output directory, if using a
384 # separate output directory. This allows convenient use of make in the
385 # output directory.
386 outputmakefile:
387 ifneq ($(KBUILD_SRC),)
388 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
389 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
390 endif
392 # To make sure we do not include .config for any of the *config targets
393 # catch them early, and hand them over to scripts/kconfig/Makefile
394 # It is allowed to specify more targets when calling make, including
395 # mixing *config targets and build targets.
396 # For example 'make oldconfig all'.
397 # Detect when mixed targets is specified, and make a second invocation
398 # of make so .config is not included in this case either (for *config).
400 no-dot-config-targets := clean mrproper distclean \
401 cscope TAGS tags help %docs check% \
402 include/linux/version.h headers_% \
403 kernelrelease kernelversion
405 config-targets := 0
406 mixed-targets := 0
407 dot-config := 1
409 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
410 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
411 dot-config := 0
412 endif
413 endif
415 ifeq ($(KBUILD_EXTMOD),)
416 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
417 config-targets := 1
418 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
419 mixed-targets := 1
420 endif
421 endif
422 endif
424 ifeq ($(mixed-targets),1)
425 # ===========================================================================
426 # We're called with mixed targets (*config and build targets).
427 # Handle them one by one.
429 %:: FORCE
430 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
432 else
433 ifeq ($(config-targets),1)
434 # ===========================================================================
435 # *config targets only - make sure prerequisites are updated, and descend
436 # in scripts/kconfig to make the *config target
438 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
439 # KBUILD_DEFCONFIG may point out an alternative default configuration
440 # used for 'make defconfig'
441 include $(srctree)/arch/$(SRCARCH)/Makefile
442 export KBUILD_DEFCONFIG KBUILD_KCONFIG
444 config: scripts_basic outputmakefile FORCE
445 $(Q)mkdir -p include/linux include/config
446 $(Q)$(MAKE) $(build)=scripts/kconfig $@
448 %config: scripts_basic outputmakefile FORCE
449 $(Q)mkdir -p include/linux include/config
450 $(Q)$(MAKE) $(build)=scripts/kconfig $@
452 else
453 # ===========================================================================
454 # Build targets only - this includes vmlinux, arch specific targets, clean
455 # targets and others. In general all targets except *config targets.
457 ifeq ($(KBUILD_EXTMOD),)
458 # Additional helpers built in scripts/
459 # Carefully list dependencies so we do not try to build scripts twice
460 # in parallel
461 PHONY += scripts
462 scripts: scripts_basic include/config/auto.conf
463 $(Q)$(MAKE) $(build)=$(@)
465 # Objects we will link into vmlinux / subdirs we need to visit
466 init-y := init/
467 drivers-y := drivers/ sound/ firmware/
468 net-y := net/
469 libs-y := lib/
470 core-y := usr/
471 endif # KBUILD_EXTMOD
473 ifeq ($(dot-config),1)
474 # Read in config
475 -include include/config/auto.conf
477 ifeq ($(KBUILD_EXTMOD),)
478 # Read in dependencies to all Kconfig* files, make sure to run
479 # oldconfig if changes are detected.
480 -include include/config/auto.conf.cmd
482 # To avoid any implicit rule to kick in, define an empty command
483 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
485 # If .config is newer than include/config/auto.conf, someone tinkered
486 # with it and forgot to run make oldconfig.
487 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
488 # we execute the config step to be sure to catch updated Kconfig files
489 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
490 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
491 else
492 # external modules needs include/linux/autoconf.h and include/config/auto.conf
493 # but do not care if they are up-to-date. Use auto.conf to trigger the test
494 PHONY += include/config/auto.conf
496 include/config/auto.conf:
497 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
498 echo; \
499 echo " ERROR: Kernel configuration is invalid."; \
500 echo " include/linux/autoconf.h or $@ are missing."; \
501 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
502 echo; \
503 /bin/false)
505 endif # KBUILD_EXTMOD
507 else
508 # Dummy target needed, because used as prerequisite
509 include/config/auto.conf: ;
510 endif # $(dot-config)
512 # The all: target is the default when no target is given on the
513 # command line.
514 # This allow a user to issue only 'make' to build a kernel including modules
515 # Defaults vmlinux but it is usually overridden in the arch makefile
516 all: vmlinux
518 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
519 KBUILD_CFLAGS += -Os
520 else
521 KBUILD_CFLAGS += -O2
522 endif
524 include $(srctree)/arch/$(SRCARCH)/Makefile
526 ifneq (CONFIG_FRAME_WARN,0)
527 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
528 endif
530 # Force gcc to behave correct even for buggy distributions
531 # Arch Makefiles may override this setting
532 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
534 ifdef CONFIG_FRAME_POINTER
535 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
536 else
537 KBUILD_CFLAGS += -fomit-frame-pointer
538 endif
540 ifdef CONFIG_DEBUG_INFO
541 KBUILD_CFLAGS += -g
542 KBUILD_AFLAGS += -gdwarf-2
543 endif
545 ifdef CONFIG_FUNCTION_TRACER
546 KBUILD_CFLAGS += -pg
547 endif
549 # We trigger additional mismatches with less inlining
550 ifdef CONFIG_DEBUG_SECTION_MISMATCH
551 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
552 endif
554 # arch Makefile may override CC so keep this after arch Makefile is included
555 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
556 CHECKFLAGS += $(NOSTDINC_FLAGS)
558 # warn about C99 declaration after statement
559 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
561 # disable pointer signed / unsigned warnings in gcc 4.0
562 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
564 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
565 # But warn user when we do so
566 warn-assign = \
567 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
569 ifneq ($(KCPPFLAGS),)
570 $(call warn-assign,CPPFLAGS)
571 KBUILD_CPPFLAGS += $(KCPPFLAGS)
572 endif
573 ifneq ($(KAFLAGS),)
574 $(call warn-assign,AFLAGS)
575 KBUILD_AFLAGS += $(KAFLAGS)
576 endif
577 ifneq ($(KCFLAGS),)
578 $(call warn-assign,CFLAGS)
579 KBUILD_CFLAGS += $(KCFLAGS)
580 endif
582 # Use --build-id when available.
583 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
584 $(call ld-option, -Wl$(comma)--build-id,))
585 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
586 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
588 # Default kernel image to build when no specific target is given.
589 # KBUILD_IMAGE may be overruled on the command line or
590 # set in the environment
591 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
592 # this default value
593 export KBUILD_IMAGE ?= vmlinux
596 # INSTALL_PATH specifies where to place the updated kernel and system map
597 # images. Default is /boot, but you can set it to other values
598 export INSTALL_PATH ?= /boot
601 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
602 # relocations required by build roots. This is not defined in the
603 # makefile but the argument can be passed to make if needed.
606 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
607 export MODLIB
609 strip-symbols := $(srctree)/scripts/strip-symbols \
610 $(wildcard $(srctree)/arch/$(ARCH)/scripts/strip-symbols)
613 # INSTALL_MOD_STRIP, if defined, will cause modules to be stripped while
614 # they get installed. If INSTALL_MOD_STRIP is '1', then the default
615 # options (see below) will be used. Otherwise, INSTALL_MOD_STRIP will
616 # be used as the option(s) to the objcopy command.
617 ifdef INSTALL_MOD_STRIP
618 ifeq ($(INSTALL_MOD_STRIP),1)
619 mod_strip_cmd = $(OBJCOPY) --strip-debug
620 ifeq ($(CONFIG_KALLSYMS_ALL),$(CONFIG_KALLSYMS_STRIP_GENERATED))
621 mod_strip_cmd += --wildcard $(addprefix --strip-symbols ,$(strip-symbols))
622 endif
623 else
624 mod_strip_cmd = $(OBJCOPY) $(INSTALL_MOD_STRIP)
625 endif # INSTALL_MOD_STRIP=1
626 else
627 mod_strip_cmd = false
628 endif # INSTALL_MOD_STRIP
629 export mod_strip_cmd
632 ifeq ($(KBUILD_EXTMOD),)
633 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
635 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
636 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
637 $(net-y) $(net-m) $(libs-y) $(libs-m)))
639 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
640 $(init-n) $(init-) \
641 $(core-n) $(core-) $(drivers-n) $(drivers-) \
642 $(net-n) $(net-) $(libs-n) $(libs-))))
644 init-y := $(patsubst %/, %/built-in.o, $(init-y))
645 core-y := $(patsubst %/, %/built-in.o, $(core-y))
646 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
647 net-y := $(patsubst %/, %/built-in.o, $(net-y))
648 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
649 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
650 libs-y := $(libs-y1) $(libs-y2)
652 # Build vmlinux
653 # ---------------------------------------------------------------------------
654 # vmlinux is built from the objects selected by $(vmlinux-init) and
655 # $(vmlinux-main). Most are built-in.o files from top-level directories
656 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
657 # Ordering when linking is important, and $(vmlinux-init) must be first.
659 # vmlinux
662 # +-< $(vmlinux-init)
663 # | +--< init/version.o + more
665 # +--< $(vmlinux-main)
666 # | +--< driver/built-in.o mm/built-in.o + more
668 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
670 # vmlinux version (uname -v) cannot be updated during normal
671 # descending-into-subdirs phase since we do not yet know if we need to
672 # update vmlinux.
673 # Therefore this step is delayed until just before final link of vmlinux -
674 # except in the kallsyms case where it is done just before adding the
675 # symbols to the kernel.
677 # System.map is generated to document addresses of all kernel symbols
679 vmlinux-init := $(head-y) $(init-y)
680 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
681 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
682 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
683 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
685 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
686 # May be overridden by arch/$(ARCH)/Makefile
687 quiet_cmd_vmlinux__ ?= LD $@
688 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
689 -T $(vmlinux-lds) $(vmlinux-init) \
690 --start-group $(vmlinux-main) --end-group \
691 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
693 # Generate new vmlinux version
694 quiet_cmd_vmlinux_version = GEN .version
695 cmd_vmlinux_version = set -e; \
696 if [ ! -r .version ]; then \
697 rm -f .version; \
698 echo 1 >.version; \
699 else \
700 mv .version .old_version; \
701 expr 0$$(cat .old_version) + 1 >.version; \
702 fi; \
703 $(MAKE) $(build)=init
705 # Generate System.map
706 quiet_cmd_sysmap = SYSMAP
707 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
709 # Link of vmlinux
710 # If CONFIG_KALLSYMS is set .version is already updated
711 # Generate System.map and verify that the content is consistent
712 # Use + in front of the vmlinux_version rule to silent warning with make -j2
713 # First command is ':' to allow us to use + in front of the rule
714 define rule_vmlinux__
716 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
718 $(call cmd,vmlinux__)
719 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
721 $(Q)$(if $($(quiet)cmd_sysmap), \
722 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
723 $(cmd_sysmap) $@ System.map; \
724 if [ $$? -ne 0 ]; then \
725 rm -f $@; \
726 /bin/false; \
728 $(verify_kallsyms)
729 endef
732 ifdef CONFIG_KALLSYMS
733 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
734 # It's a three stage process:
735 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
736 # empty
737 # Running kallsyms on that gives us .tmp_kallsyms1.o with
738 # the right size - vmlinux version (uname -v) is updated during this step
739 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
740 # but due to the added section, some addresses have shifted.
741 # From here, we generate a correct .tmp_kallsyms2.o
742 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
743 # o Verify that the System.map from vmlinux matches the map from
744 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
745 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
746 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
747 # temporary bypass to allow the kernel to be built while the
748 # maintainers work out what went wrong with kallsyms.
750 ifdef CONFIG_KALLSYMS_EXTRA_PASS
751 last_kallsyms := 3
752 else
753 last_kallsyms := 2
754 endif
756 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
757 kallsyms.h := $(wildcard include/config/kallsyms/*.h) $(wildcard include/config/kallsyms/*/*.h)
759 define verify_kallsyms
760 $(Q)$(if $($(quiet)cmd_sysmap), \
761 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
762 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
763 $(Q)cmp -s System.map .tmp_System.map || \
764 (echo Inconsistent kallsyms data; \
765 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
766 rm .tmp_kallsyms* ; /bin/false )
767 endef
769 # Update vmlinux version before link
770 # Use + in front of this rule to silent warning about make -j1
771 # First command is ':' to allow us to use + in front of this rule
772 cmd_ksym_ld = $(cmd_vmlinux__)
773 define rule_ksym_ld
775 +$(call cmd,vmlinux_version)
776 $(call cmd,vmlinux__)
777 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
778 endef
780 # Generate .S file with all kernel symbols
781 quiet_cmd_kallsyms = KSYM $@
782 cmd_kallsyms = { test $* -eq 0 || $(NM) -n $<; } \
783 | $(KALLSYMS) $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) >$@
785 quiet_cmd_kstrip = STRIP $@
786 cmd_kstrip = $(OBJCOPY) --wildcard $(addprefix --strip$(if $(CONFIG_RELOCATABLE),-unneeded)-symbols ,$(filter %/scripts/strip-symbols,$^)) $< $@
788 $(foreach n,0 1 2 3,.tmp_kallsyms$(n).o): KBUILD_AFLAGS += -Wa,--strip-local-absolute
789 $(foreach n,0 1 2 3,.tmp_kallsyms$(n).o): %.o: %.S scripts FORCE
790 $(call if_changed_dep,as_o_S)
792 ifeq ($(CONFIG_KALLSYMS_STRIP_GENERATED),y)
793 strip-ext := .stripped
794 endif
796 .tmp_kallsyms%.S: .tmp_vmlinux%$(strip-ext) $(KALLSYMS) $(kallsyms.h)
797 $(call cmd,kallsyms)
799 # make -jN seems to have problems with intermediate files, see bug #3330.
800 .SECONDARY: $(foreach n,1 2 3,.tmp_vmlinux$(n).stripped)
801 .tmp_vmlinux%.stripped: .tmp_vmlinux% $(strip-symbols) $(kallsyms.h)
802 $(call cmd,kstrip)
804 ifneq ($(CONFIG_DEBUG_INFO),y)
805 .tmp_vmlinux%: LDFLAGS_vmlinux += -S
806 endif
807 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
808 .tmp_vmlinux%: $(vmlinux-lds) $(vmlinux-all) FORCE
809 $(if $(filter 1,$*),$(call if_changed_rule,ksym_ld),$(call if_changed,vmlinux__))
811 .tmp_vmlinux0$(strip-ext):
812 $(Q)echo "placeholder" >$@
814 .tmp_vmlinux1: .tmp_kallsyms0.o
815 .tmp_vmlinux2: .tmp_kallsyms1.o
816 .tmp_vmlinux3: .tmp_kallsyms2.o
818 # Needs to visit scripts/ before $(KALLSYMS) can be used.
819 $(KALLSYMS): scripts ;
821 # Generate some data for debugging strange kallsyms problems
822 debug_kallsyms: .tmp_map$(last_kallsyms)
824 .tmp_map%: .tmp_vmlinux% FORCE
825 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
827 .tmp_map3: .tmp_map2
829 .tmp_map2: .tmp_map1
831 endif # ifdef CONFIG_KALLSYMS
833 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
834 # relevant sections renamed as per the linker script.
835 quiet_cmd_vmlinux-modpost = LD $@
836 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
837 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
838 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
839 define rule_vmlinux-modpost
841 +$(call cmd,vmlinux-modpost)
842 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
843 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
844 endef
846 # vmlinux image - including updated kernel symbols
847 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
848 ifdef CONFIG_HEADERS_CHECK
849 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
850 endif
851 ifdef CONFIG_SAMPLES
852 $(Q)$(MAKE) $(build)=samples
853 endif
854 ifdef CONFIG_BUILD_DOCSRC
855 $(Q)$(MAKE) $(build)=Documentation
856 endif
857 $(call vmlinux-modpost)
858 $(call if_changed_rule,vmlinux__)
859 $(Q)rm -f .old_version
861 # build vmlinux.o first to catch section mismatch errors early
862 ifdef CONFIG_KALLSYMS
863 .tmp_vmlinux1: vmlinux.o
864 endif
866 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
867 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
868 $(call if_changed_rule,vmlinux-modpost)
870 # The actual objects are generated when descending,
871 # make sure no implicit rule kicks in
872 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
874 # Handle descending into subdirectories listed in $(vmlinux-dirs)
875 # Preset locale variables to speed up the build process. Limit locale
876 # tweaks to this spot to avoid wrong language settings when running
877 # make menuconfig etc.
878 # Error messages still appears in the original language
880 PHONY += $(vmlinux-dirs)
881 $(vmlinux-dirs): prepare scripts
882 $(Q)$(MAKE) $(build)=$@
884 # Build the kernel release string
886 # The KERNELRELEASE value built here is stored in the file
887 # include/config/kernel.release, and is used when executing several
888 # make targets, such as "make install" or "make modules_install."
890 # The eventual kernel release string consists of the following fields,
891 # shown in a hierarchical format to show how smaller parts are concatenated
892 # to form the larger and final value, with values coming from places like
893 # the Makefile, kernel config options, make command line options and/or
894 # SCM tag information.
896 # $(KERNELVERSION)
897 # $(VERSION) eg, 2
898 # $(PATCHLEVEL) eg, 6
899 # $(SUBLEVEL) eg, 18
900 # $(EXTRAVERSION) eg, -rc6
901 # $(localver-full)
902 # $(localver)
903 # localversion* (files without backups, containing '~')
904 # $(CONFIG_LOCALVERSION) (from kernel config setting)
905 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
906 # ./scripts/setlocalversion (SCM tag, if one exists)
907 # $(LOCALVERSION) (from make command line if provided)
909 # Note how the final $(localver-auto) string is included *only* if the
910 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
911 # moment, only git is supported but other SCMs can edit the script
912 # scripts/setlocalversion and add the appropriate checks as needed.
914 pattern = ".*/localversion[^~]*"
915 string = $(shell cat /dev/null \
916 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
918 localver = $(subst $(space),, $(string) \
919 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
921 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
922 # and if the SCM is know a tag from the SCM is appended.
923 # The appended tag is determined by the SCM used.
925 # Currently, only git is supported.
926 # Other SCMs can edit scripts/setlocalversion and add the appropriate
927 # checks as needed.
928 ifdef CONFIG_LOCALVERSION_AUTO
929 _localver-auto = $(shell $(CONFIG_SHELL) \
930 $(srctree)/scripts/setlocalversion $(srctree))
931 localver-auto = $(LOCALVERSION)$(_localver-auto)
932 endif
934 localver-full = $(localver)$(localver-auto)
936 # Store (new) KERNELRELASE string in include/config/kernel.release
937 kernelrelease = $(KERNELVERSION)$(localver-full)
938 include/config/kernel.release: include/config/auto.conf FORCE
939 $(Q)rm -f $@
940 $(Q)echo $(kernelrelease) > $@
943 # Things we need to do before we recursively start building the kernel
944 # or the modules are listed in "prepare".
945 # A multi level approach is used. prepareN is processed before prepareN-1.
946 # archprepare is used in arch Makefiles and when processed asm symlink,
947 # version.h and scripts_basic is processed / created.
949 # Listed in dependency order
950 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
952 # prepare3 is used to check if we are building in a separate output directory,
953 # and if so do:
954 # 1) Check that make has not been executed in the kernel src $(srctree)
955 # 2) Create the include2 directory, used for the second asm symlink
956 prepare3: include/config/kernel.release
957 ifneq ($(KBUILD_SRC),)
958 @$(kecho) ' Using $(srctree) as source for kernel'
959 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
960 echo " $(srctree) is not clean, please run 'make mrproper'";\
961 echo " in the '$(srctree)' directory.";\
962 /bin/false; \
964 $(Q)if [ ! -d include2 ]; then \
965 mkdir -p include2; \
966 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
968 endif
970 # prepare2 creates a makefile if using a separate output directory
971 prepare2: prepare3 outputmakefile
973 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
974 include/asm include/config/auto.conf
975 $(cmd_crmodverdir)
977 archprepare: prepare1 scripts_basic
979 prepare0: archprepare FORCE
980 $(Q)$(MAKE) $(build)=.
981 $(Q)$(MAKE) $(build)=. missing-syscalls
983 # All the preparing..
984 prepare: prepare0
986 # Leave this as default for preprocessing vmlinux.lds.S, which is now
987 # done in arch/$(ARCH)/kernel/Makefile
989 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
991 # The asm symlink changes when $(ARCH) changes.
992 # Detect this and ask user to run make mrproper
993 # If asm is a stale symlink (point to dir that does not exist) remove it
994 define check-symlink
995 set -e; \
996 if [ -L include/asm ]; then \
997 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
998 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
999 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
1000 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
1001 exit 1; \
1002 fi; \
1003 test -e $$asmlink || rm include/asm; \
1004 elif [ -d include/asm ]; then \
1005 echo "ERROR: $@ is a directory but a symlink was expected";\
1006 exit 1; \
1008 endef
1010 # We create the target directory of the symlink if it does
1011 # not exist so the test in chack-symlink works and we have a
1012 # directory for generated filesas used by some architectures.
1013 define create-symlink
1014 if [ ! -L include/asm ]; then \
1015 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
1016 if [ ! -d include/asm-$(SRCARCH) ]; then \
1017 mkdir -p include/asm-$(SRCARCH); \
1018 fi; \
1019 ln -fsn asm-$(SRCARCH) $@; \
1021 endef
1023 include/asm: FORCE
1024 $(Q)$(check-symlink)
1025 $(Q)$(create-symlink)
1027 # Generate some files
1028 # ---------------------------------------------------------------------------
1030 # KERNELRELEASE can change from a few different places, meaning version.h
1031 # needs to be updated, so this check is forced on all builds
1033 uts_len := 64
1034 define filechk_utsrelease.h
1035 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1036 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1037 exit 1; \
1038 fi; \
1039 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1040 endef
1042 define filechk_version.h
1043 (echo \#define LINUX_VERSION_CODE $(shell \
1044 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1045 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1046 endef
1048 include/linux/version.h: $(srctree)/Makefile FORCE
1049 $(call filechk,version.h)
1051 include/linux/utsrelease.h: include/config/kernel.release FORCE
1052 $(call filechk,utsrelease.h)
1054 PHONY += headerdep
1055 headerdep:
1056 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1058 # ---------------------------------------------------------------------------
1060 PHONY += depend dep
1061 depend dep:
1062 @echo '*** Warning: make $@ is unnecessary now.'
1064 # ---------------------------------------------------------------------------
1065 # Firmware install
1066 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1067 export INSTALL_FW_PATH
1069 PHONY += firmware_install
1070 firmware_install: FORCE
1071 @mkdir -p $(objtree)/firmware
1072 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1074 # ---------------------------------------------------------------------------
1075 # Kernel headers
1077 #Default location for installed headers
1078 export INSTALL_HDR_PATH = $(objtree)/usr
1080 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1081 # Find out where the Kbuild file is located to support
1082 # arch/$(ARCH)/include/asm
1083 hdr-dir = $(strip \
1084 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1085 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1087 # If we do an all arch process set dst to asm-$(hdr-arch)
1088 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1090 PHONY += __headers
1091 __headers: include/linux/version.h scripts_basic FORCE
1092 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1094 PHONY += headers_install_all
1095 headers_install_all:
1096 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1098 PHONY += headers_install
1099 headers_install: __headers
1100 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1101 $(error Headers not exportable for the $(SRCARCH) architecture))
1102 $(Q)$(MAKE) $(hdr-inst)=include
1103 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1105 PHONY += headers_check_all
1106 headers_check_all: headers_install_all
1107 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1109 PHONY += headers_check
1110 headers_check: headers_install
1111 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1112 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1114 # ---------------------------------------------------------------------------
1115 # Modules
1117 ifdef CONFIG_MODULES
1119 # By default, build modules as well
1121 all: modules
1123 # Build modules
1125 # A module can be listed more than once in obj-m resulting in
1126 # duplicate lines in modules.order files. Those are removed
1127 # using awk while concatenating to the final file.
1129 PHONY += modules
1130 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1131 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1132 @$(kecho) ' Building modules, stage 2.';
1133 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1134 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1137 # Target to prepare building external modules
1138 PHONY += modules_prepare
1139 modules_prepare: prepare scripts
1141 # Target to install modules
1142 PHONY += modules_install
1143 modules_install: _modinst_ _modinst_post
1145 PHONY += _modinst_
1146 _modinst_:
1147 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1148 echo "Warning: you may need to install module-init-tools"; \
1149 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1150 sleep 1; \
1152 @rm -rf $(MODLIB)/kernel
1153 @rm -f $(MODLIB)/source
1154 @mkdir -p $(MODLIB)/kernel
1155 @ln -s $(srctree) $(MODLIB)/source
1156 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1157 rm -f $(MODLIB)/build ; \
1158 ln -s $(objtree) $(MODLIB)/build ; \
1160 @cp -f $(objtree)/modules.order $(MODLIB)/
1161 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1163 # This depmod is only for convenience to give the initial
1164 # boot a modules.dep even before / is mounted read-write. However the
1165 # boot script depmod is the master version.
1166 PHONY += _modinst_post
1167 _modinst_post: _modinst_
1168 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1169 $(call cmd,depmod)
1171 else # CONFIG_MODULES
1173 # Modules not configured
1174 # ---------------------------------------------------------------------------
1176 modules modules_install: FORCE
1177 @echo
1178 @echo "The present kernel configuration has modules disabled."
1179 @echo "Type 'make config' and enable loadable module support."
1180 @echo "Then build a kernel with module support enabled."
1181 @echo
1182 @exit 1
1184 endif # CONFIG_MODULES
1187 # Cleaning is done on three levels.
1188 # make clean Delete most generated files
1189 # Leave enough to build external modules
1190 # make mrproper Delete the current configuration, and all generated files
1191 # make distclean Remove editor backup files, patch leftover files and the like
1193 # Directories & files removed with 'make clean'
1194 CLEAN_DIRS += $(MODVERDIR)
1195 CLEAN_FILES += vmlinux System.map \
1196 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1198 # Directories & files removed with 'make mrproper'
1199 MRPROPER_DIRS += include/config include2 usr/include
1200 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1201 include/linux/autoconf.h include/linux/version.h \
1202 include/linux/utsrelease.h \
1203 include/linux/bounds.h include/asm*/asm-offsets.h \
1204 Module.symvers Module.markers tags TAGS cscope*
1206 # clean - Delete most, but leave enough to build external modules
1208 clean: rm-dirs := $(CLEAN_DIRS)
1209 clean: rm-files := $(CLEAN_FILES)
1210 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1212 PHONY += $(clean-dirs) clean archclean
1213 $(clean-dirs):
1214 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1216 clean: archclean $(clean-dirs)
1217 $(call cmd,rmdirs)
1218 $(call cmd,rmfiles)
1219 @find . $(RCS_FIND_IGNORE) \
1220 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1221 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1222 -o -name '*.symtypes' -o -name 'modules.order' \
1223 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
1224 -type f -print | xargs rm -f
1226 # mrproper - Delete all generated files, including .config
1228 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1229 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1230 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1232 PHONY += $(mrproper-dirs) mrproper archmrproper
1233 $(mrproper-dirs):
1234 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1236 mrproper: clean archmrproper $(mrproper-dirs)
1237 $(call cmd,rmdirs)
1238 $(call cmd,rmfiles)
1240 # distclean
1242 PHONY += distclean
1244 distclean: mrproper
1245 @find $(srctree) $(RCS_FIND_IGNORE) \
1246 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1247 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1248 -o -name '.*.rej' -o -size 0 \
1249 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1250 -type f -print | xargs rm -f
1253 # Packaging of the kernel to various formats
1254 # ---------------------------------------------------------------------------
1255 # rpm target kept for backward compatibility
1256 package-dir := $(srctree)/scripts/package
1258 %pkg: include/config/kernel.release FORCE
1259 $(Q)$(MAKE) $(build)=$(package-dir) $@
1260 rpm: include/config/kernel.release FORCE
1261 $(Q)$(MAKE) $(build)=$(package-dir) $@
1264 # Brief documentation of the typical targets used
1265 # ---------------------------------------------------------------------------
1267 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1268 boards := $(notdir $(boards))
1269 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1270 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1272 help:
1273 @echo 'Cleaning targets:'
1274 @echo ' clean - Remove most generated files but keep the config and'
1275 @echo ' enough build support to build external modules'
1276 @echo ' mrproper - Remove all generated files + config + various backup files'
1277 @echo ' distclean - mrproper + remove editor backup and patch files'
1278 @echo ''
1279 @echo 'Configuration targets:'
1280 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1281 @echo ''
1282 @echo 'Other generic targets:'
1283 @echo ' all - Build all targets marked with [*]'
1284 @echo '* vmlinux - Build the bare kernel'
1285 @echo '* modules - Build all modules'
1286 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1287 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1288 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1289 @echo ' dir/ - Build all files in dir and below'
1290 @echo ' dir/file.[ois] - Build specified target only'
1291 @echo ' dir/file.ko - Build module including final link'
1292 @echo ' prepare - Set up for building external modules'
1293 @echo ' tags/TAGS - Generate tags file for editors'
1294 @echo ' cscope - Generate cscope index'
1295 @echo ' kernelrelease - Output the release version string'
1296 @echo ' kernelversion - Output the version stored in Makefile'
1297 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1298 echo ' (default: $(INSTALL_HDR_PATH))'; \
1299 echo ''
1300 @echo 'Static analysers'
1301 @echo ' checkstack - Generate a list of stack hogs'
1302 @echo ' namespacecheck - Name space analysis on compiled kernel'
1303 @echo ' versioncheck - Sanity check on version.h usage'
1304 @echo ' includecheck - Check for duplicate included header files'
1305 @echo ' export_report - List the usages of all exported symbols'
1306 @echo ' headers_check - Sanity check on exported headers'
1307 @echo ' headerdep - Detect inclusion cycles in headers'; \
1308 echo ''
1309 @echo 'Kernel packaging:'
1310 @$(MAKE) $(build)=$(package-dir) help
1311 @echo ''
1312 @echo 'Documentation targets:'
1313 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1314 @echo ''
1315 @echo 'Architecture specific targets ($(SRCARCH)):'
1316 @$(if $(archhelp),$(archhelp),\
1317 echo ' No architecture specific help defined for $(SRCARCH)')
1318 @echo ''
1319 @$(if $(boards), \
1320 $(foreach b, $(boards), \
1321 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1322 echo '')
1323 @$(if $(board-dirs), \
1324 $(foreach b, $(board-dirs), \
1325 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1326 printf " %-16s - Show all of the above\\n" help-boards; \
1327 echo '')
1329 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1330 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1331 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1332 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1333 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1334 @echo ''
1335 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1336 @echo 'For further info see the ./README file'
1339 help-board-dirs := $(addprefix help-,$(board-dirs))
1341 help-boards: $(help-board-dirs)
1343 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1345 $(help-board-dirs): help-%:
1346 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1347 @$(if $(boards-per-dir), \
1348 $(foreach b, $(boards-per-dir), \
1349 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1350 echo '')
1353 # Documentation targets
1354 # ---------------------------------------------------------------------------
1355 %docs: scripts_basic FORCE
1356 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1358 else # KBUILD_EXTMOD
1361 # External module support.
1362 # When building external modules the kernel used as basis is considered
1363 # read-only, and no consistency checks are made and the make
1364 # system is not used on the basis kernel. If updates are required
1365 # in the basis kernel ordinary make commands (without M=...) must
1366 # be used.
1368 # The following are the only valid targets when building external
1369 # modules.
1370 # make M=dir clean Delete all automatically generated files
1371 # make M=dir modules Make all modules in specified dir
1372 # make M=dir Same as 'make M=dir modules'
1373 # make M=dir modules_install
1374 # Install the modules built in the module directory
1375 # Assumes install directory is already created
1377 # We are always building modules
1378 KBUILD_MODULES := 1
1379 PHONY += crmodverdir
1380 crmodverdir:
1381 $(cmd_crmodverdir)
1383 PHONY += $(objtree)/Module.symvers
1384 $(objtree)/Module.symvers:
1385 @test -e $(objtree)/Module.symvers || ( \
1386 echo; \
1387 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1388 echo " is missing; modules will have no dependencies and modversions."; \
1389 echo )
1391 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1392 PHONY += $(module-dirs) modules
1393 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1394 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1396 modules: $(module-dirs)
1397 @$(kecho) ' Building modules, stage 2.';
1398 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1400 PHONY += modules_install
1401 modules_install: _emodinst_ _emodinst_post
1403 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1404 PHONY += _emodinst_
1405 _emodinst_:
1406 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1407 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1409 PHONY += _emodinst_post
1410 _emodinst_post: _emodinst_
1411 $(call cmd,depmod)
1413 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1415 PHONY += $(clean-dirs) clean
1416 $(clean-dirs):
1417 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1419 clean: rm-dirs := $(MODVERDIR)
1420 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1421 clean: $(clean-dirs)
1422 $(call cmd,rmdirs)
1423 $(call cmd,rmfiles)
1424 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1425 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1426 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1427 -type f -print | xargs rm -f
1429 help:
1430 @echo ' Building external modules.'
1431 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1432 @echo ''
1433 @echo ' modules - default target, build the module(s)'
1434 @echo ' modules_install - install the module'
1435 @echo ' clean - remove generated files in module directory only'
1436 @echo ''
1438 # Dummies...
1439 PHONY += prepare scripts
1440 prepare: ;
1441 scripts: ;
1442 endif # KBUILD_EXTMOD
1444 # Generate tags for editors
1445 # ---------------------------------------------------------------------------
1446 quiet_cmd_tags = GEN $@
1447 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1449 tags TAGS cscope: FORCE
1450 $(call cmd,tags)
1452 # Scripts to check various things for consistency
1453 # ---------------------------------------------------------------------------
1455 includecheck:
1456 find * $(RCS_FIND_IGNORE) \
1457 -name '*.[hcS]' -type f -print | sort \
1458 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1460 versioncheck:
1461 find * $(RCS_FIND_IGNORE) \
1462 -name '*.[hcS]' -type f -print | sort \
1463 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1465 namespacecheck:
1466 $(PERL) $(srctree)/scripts/namespace.pl
1468 export_report:
1469 $(PERL) $(srctree)/scripts/export_report.pl
1471 endif #ifeq ($(config-targets),1)
1472 endif #ifeq ($(mixed-targets),1)
1474 PHONY += checkstack kernelrelease kernelversion
1476 # UML needs a little special treatment here. It wants to use the host
1477 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1478 # else wants $(ARCH), including people doing cross-builds, which means
1479 # that $(SUBARCH) doesn't work here.
1480 ifeq ($(ARCH), um)
1481 CHECKSTACK_ARCH := $(SUBARCH)
1482 else
1483 CHECKSTACK_ARCH := $(ARCH)
1484 endif
1485 checkstack:
1486 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1487 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1489 kernelrelease:
1490 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1491 $(error kernelrelease not valid - run 'make prepare' to update it))
1492 kernelversion:
1493 @echo $(KERNELVERSION)
1495 # Single targets
1496 # ---------------------------------------------------------------------------
1497 # Single targets are compatible with:
1498 # - build with mixed source and output
1499 # - build with separate output dir 'make O=...'
1500 # - external modules
1502 # target-dir => where to store outputfile
1503 # build-dir => directory in kernel source tree to use
1505 ifeq ($(KBUILD_EXTMOD),)
1506 build-dir = $(patsubst %/,%,$(dir $@))
1507 target-dir = $(dir $@)
1508 else
1509 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1510 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1511 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1512 endif
1514 %.s: %.c prepare scripts FORCE
1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1516 %.i: %.c prepare scripts FORCE
1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1518 %.o: %.c prepare scripts FORCE
1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1520 %.lst: %.c prepare scripts FORCE
1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1522 %.s: %.S prepare scripts FORCE
1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1524 %.o: %.S prepare scripts FORCE
1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1526 %.symtypes: %.c prepare scripts FORCE
1527 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1529 # Modules
1530 /: prepare scripts FORCE
1531 $(cmd_crmodverdir)
1532 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1533 $(build)=$(build-dir)
1534 %/: prepare scripts FORCE
1535 $(cmd_crmodverdir)
1536 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1537 $(build)=$(build-dir)
1538 %.ko: prepare scripts FORCE
1539 $(cmd_crmodverdir)
1540 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1541 $(build)=$(build-dir) $(@:.ko=.o)
1542 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1544 # FIXME Should go into a make.lib or something
1545 # ===========================================================================
1547 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1548 cmd_rmdirs = rm -rf $(rm-dirs)
1550 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1551 cmd_rmfiles = rm -f $(rm-files)
1553 # Run depmod only if we have System.map and depmod is executable
1554 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1555 cmd_depmod = \
1556 if [ -r System.map -a -x $(DEPMOD) ]; then \
1557 $(DEPMOD) -ae -F System.map \
1558 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1559 $(KERNELRELEASE); \
1562 # Create temporary dir for module support files
1563 # clean it up only when building all modules
1564 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1565 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1567 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1568 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1569 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1571 quiet_cmd_as_o_S = AS $@
1572 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1574 # read all saved command lines
1576 targets := $(wildcard $(sort $(targets)))
1577 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1579 ifneq ($(cmd_files),)
1580 $(cmd_files): ; # Do not try to update included dependency files
1581 include $(cmd_files)
1582 endif
1584 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1585 # Usage:
1586 # $(Q)$(MAKE) $(clean)=dir
1587 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1589 endif # skip-makefile
1591 PHONY += FORCE
1592 FORCE:
1594 # Declare the contents of the .PHONY variable as phony. We keep that
1595 # information in a variable se we can use it in if_changed and friends.
1596 .PHONY: $(PHONY)