ACPI: Disable MWAIT via DMI on broken Compal board
[linux-2.6/mini2440.git] / Makefile
blob1564577bdc5386dd9a9f2856ef244303ac302436
1 FRED=42
2 VERSION = 2
3 PATCHLEVEL = 6
4 SUBLEVEL = 26
5 EXTRAVERSION =
6 NAME = Rotary Wombat
8 # *DOCUMENTATION*
9 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README
11 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel reading this file.
14 # Do not:
15 # o use make's built-in rules and variables
16 # (this increases performance and avoids hard-to-debug behaviour);
17 # o print "Entering directory ...";
18 MAKEFLAGS += -rR --no-print-directory
20 # We are using a recursive build, so we need to do a little thinking
21 # to get the ordering right.
23 # Most importantly: sub-Makefiles should only ever modify files in
24 # their own directory. If in some directory we have a dependency on
25 # a file in another dir (which doesn't happen often, but it's often
26 # unavoidable when linking the built-in.o targets which finally
27 # turn into vmlinux), we will call a sub make in that other dir, and
28 # after that we are sure that everything which is in that other dir
29 # is now up to date.
31 # The only cases where we need to modify files which have global
32 # effects are thus separated out and done before the recursive
33 # descending is started. They are now explicitly listed as the
34 # prepare rule.
36 # To put more focus on warnings, be less verbose as default
37 # Use 'make V=1' to see the full commands
39 ifdef V
40 ifeq ("$(origin V)", "command line")
41 KBUILD_VERBOSE = $(V)
42 endif
43 endif
44 ifndef KBUILD_VERBOSE
45 KBUILD_VERBOSE = 0
46 endif
48 # Call a source code checker (by default, "sparse") as part of the
49 # C compilation.
51 # Use 'make C=1' to enable checking of only re-compiled files.
52 # Use 'make C=2' to enable checking of *all* source files, regardless
53 # of whether they are re-compiled or not.
55 # See the file "Documentation/sparse.txt" for more details, including
56 # where to get the "sparse" utility.
58 ifdef C
59 ifeq ("$(origin C)", "command line")
60 KBUILD_CHECKSRC = $(C)
61 endif
62 endif
63 ifndef KBUILD_CHECKSRC
64 KBUILD_CHECKSRC = 0
65 endif
67 # Use make M=dir to specify directory of external module to build
68 # Old syntax make ... SUBDIRS=$PWD is still supported
69 # Setting the environment variable KBUILD_EXTMOD take precedence
70 ifdef SUBDIRS
71 KBUILD_EXTMOD ?= $(SUBDIRS)
72 endif
73 ifdef M
74 ifeq ("$(origin M)", "command line")
75 KBUILD_EXTMOD := $(M)
76 endif
77 endif
80 # kbuild supports saving output files in a separate directory.
81 # To locate output files in a separate directory two syntaxes are supported.
82 # In both cases the working directory must be the root of the kernel src.
83 # 1) O=
84 # Use "make O=dir/to/store/output/files/"
86 # 2) Set KBUILD_OUTPUT
87 # Set the environment variable KBUILD_OUTPUT to point to the directory
88 # where the output files shall be placed.
89 # export KBUILD_OUTPUT=dir/to/store/output/files/
90 # make
92 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
93 # variable.
96 # KBUILD_SRC is set on invocation of make in OBJ directory
97 # KBUILD_SRC is not intended to be used by the regular user (for now)
98 ifeq ($(KBUILD_SRC),)
100 # OK, Make called in directory where kernel src resides
101 # Do we want to locate output files in a separate directory?
102 ifdef O
103 ifeq ("$(origin O)", "command line")
104 KBUILD_OUTPUT := $(O)
105 endif
106 endif
108 # That's our default target when none is given on the command line
109 PHONY := _all
110 _all:
112 # Cancel implicit rules on top Makefile
113 $(CURDIR)/Makefile Makefile: ;
115 ifneq ($(KBUILD_OUTPUT),)
116 # Invoke a second make in the output directory, passing relevant variables
117 # check that the output directory actually exists
118 saved-output := $(KBUILD_OUTPUT)
119 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
120 $(if $(KBUILD_OUTPUT),, \
121 $(error output directory "$(saved-output)" does not exist))
123 PHONY += $(MAKECMDGOALS) sub-make
125 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
126 $(Q)@:
128 sub-make: FORCE
129 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
130 KBUILD_SRC=$(CURDIR) \
131 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
132 $(filter-out _all sub-make,$(MAKECMDGOALS))
134 # Leave processing to above invocation of make
135 skip-makefile := 1
136 endif # ifneq ($(KBUILD_OUTPUT),)
137 endif # ifeq ($(KBUILD_SRC),)
139 # We process the rest of the Makefile if this is the final invocation of make
140 ifeq ($(skip-makefile),)
142 # If building an external module we do not care about the all: rule
143 # but instead _all depend on modules
144 PHONY += all
145 ifeq ($(KBUILD_EXTMOD),)
146 _all: all
147 else
148 _all: modules
149 endif
151 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
152 TOPDIR := $(srctree)
153 # FIXME - TOPDIR is obsolete, use srctree/objtree
154 objtree := $(CURDIR)
155 src := $(srctree)
156 obj := $(objtree)
158 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
160 export srctree objtree VPATH TOPDIR
163 # SUBARCH tells the usermode build what the underlying arch is. That is set
164 # first, and if a usermode build is happening, the "ARCH=um" on the command
165 # line overrides the setting of ARCH below. If a native build is happening,
166 # then ARCH is assigned, getting whatever value it gets normally, and
167 # SUBARCH is subsequently ignored.
169 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
170 -e s/arm.*/arm/ -e s/sa110/arm/ \
171 -e s/s390x/s390/ -e s/parisc64/parisc/ \
172 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
173 -e s/sh.*/sh/ )
175 # Cross compiling and selecting different set of gcc/bin-utils
176 # ---------------------------------------------------------------------------
178 # When performing cross compilation for other architectures ARCH shall be set
179 # to the target architecture. (See arch/* for the possibilities).
180 # ARCH can be set during invocation of make:
181 # make ARCH=ia64
182 # Another way is to have ARCH set in the environment.
183 # The default ARCH is the host where make is executed.
185 # CROSS_COMPILE specify the prefix used for all executables used
186 # during compilation. Only gcc and related bin-utils executables
187 # are prefixed with $(CROSS_COMPILE).
188 # CROSS_COMPILE can be set on the command line
189 # make CROSS_COMPILE=ia64-linux-
190 # Alternatively CROSS_COMPILE can be set in the environment.
191 # Default value for CROSS_COMPILE is not to prefix executables
192 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
193 export KBUILD_BUILDHOST := $(SUBARCH)
194 ARCH ?= $(SUBARCH)
195 CROSS_COMPILE ?=
197 # Architecture as present in compile.h
198 UTS_MACHINE := $(ARCH)
199 SRCARCH := $(ARCH)
201 # Additional ARCH settings for x86
202 ifeq ($(ARCH),i386)
203 SRCARCH := x86
204 endif
205 ifeq ($(ARCH),x86_64)
206 SRCARCH := x86
207 endif
209 KCONFIG_CONFIG ?= .config
211 # SHELL used by kbuild
212 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
213 else if [ -x /bin/bash ]; then echo /bin/bash; \
214 else echo sh; fi ; fi)
216 HOSTCC = gcc
217 HOSTCXX = g++
218 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
219 HOSTCXXFLAGS = -O2
221 # Decide whether to build built-in, modular, or both.
222 # Normally, just do built-in.
224 KBUILD_MODULES :=
225 KBUILD_BUILTIN := 1
227 # If we have only "make modules", don't compile built-in objects.
228 # When we're building modules with modversions, we need to consider
229 # the built-in objects during the descend as well, in order to
230 # make sure the checksums are up to date before we record them.
232 ifeq ($(MAKECMDGOALS),modules)
233 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
234 endif
236 # If we have "make <whatever> modules", compile modules
237 # in addition to whatever we do anyway.
238 # Just "make" or "make all" shall build modules as well
240 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
241 KBUILD_MODULES := 1
242 endif
244 ifeq ($(MAKECMDGOALS),)
245 KBUILD_MODULES := 1
246 endif
248 export KBUILD_MODULES KBUILD_BUILTIN
249 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
251 # Beautify output
252 # ---------------------------------------------------------------------------
254 # Normally, we echo the whole command before executing it. By making
255 # that echo $($(quiet)$(cmd)), we now have the possibility to set
256 # $(quiet) to choose other forms of output instead, e.g.
258 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
259 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
261 # If $(quiet) is empty, the whole command will be printed.
262 # If it is set to "quiet_", only the short version will be printed.
263 # If it is set to "silent_", nothing will be printed at all, since
264 # the variable $(silent_cmd_cc_o_c) doesn't exist.
266 # A simple variant is to prefix commands with $(Q) - that's useful
267 # for commands that shall be hidden in non-verbose mode.
269 # $(Q)ln $@ :<
271 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
272 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
274 ifeq ($(KBUILD_VERBOSE),1)
275 quiet =
277 else
278 quiet=quiet_
279 Q = @
280 endif
282 # If the user is running make -s (silent mode), suppress echoing of
283 # commands
285 ifneq ($(findstring s,$(MAKEFLAGS)),)
286 quiet=silent_
287 endif
289 export quiet Q KBUILD_VERBOSE
292 # Look for make include files relative to root of kernel src
293 MAKEFLAGS += --include-dir=$(srctree)
295 # We need some generic definitions (do not try to remake the file).
296 $(srctree)/scripts/Kbuild.include: ;
297 include $(srctree)/scripts/Kbuild.include
299 # Make variables (CC, etc...)
301 AS = $(CROSS_COMPILE)as
302 LD = $(CROSS_COMPILE)ld
303 CC = $(CROSS_COMPILE)gcc
304 CPP = $(CC) -E
305 AR = $(CROSS_COMPILE)ar
306 NM = $(CROSS_COMPILE)nm
307 STRIP = $(CROSS_COMPILE)strip
308 OBJCOPY = $(CROSS_COMPILE)objcopy
309 OBJDUMP = $(CROSS_COMPILE)objdump
310 AWK = awk
311 GENKSYMS = scripts/genksyms/genksyms
312 DEPMOD = /sbin/depmod
313 KALLSYMS = scripts/kallsyms
314 PERL = perl
315 CHECK = sparse
317 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
318 MODFLAGS = -DMODULE
319 CFLAGS_MODULE = $(MODFLAGS)
320 AFLAGS_MODULE = $(MODFLAGS)
321 LDFLAGS_MODULE =
322 CFLAGS_KERNEL =
323 AFLAGS_KERNEL =
326 # Use LINUXINCLUDE when you must reference the include/ directory.
327 # Needed to be compatible with the O= option
328 LINUXINCLUDE := -Iinclude \
329 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
330 -include include/linux/autoconf.h
332 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
334 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
335 -fno-strict-aliasing -fno-common \
336 -Werror-implicit-function-declaration
337 KBUILD_AFLAGS := -D__ASSEMBLY__
339 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
340 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
341 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
343 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
344 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
345 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
346 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
348 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
349 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
350 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
352 # When compiling out-of-tree modules, put MODVERDIR in the module
353 # tree rather than in the kernel tree. The kernel tree might
354 # even be read-only.
355 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
357 # Files to ignore in find ... statements
359 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
360 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
362 # ===========================================================================
363 # Rules shared between *config targets and build targets
365 # Basic helpers built in scripts/
366 PHONY += scripts_basic
367 scripts_basic:
368 $(Q)$(MAKE) $(build)=scripts/basic
370 # To avoid any implicit rule to kick in, define an empty command.
371 scripts/basic/%: scripts_basic ;
373 PHONY += outputmakefile
374 # outputmakefile generates a Makefile in the output directory, if using a
375 # separate output directory. This allows convenient use of make in the
376 # output directory.
377 outputmakefile:
378 ifneq ($(KBUILD_SRC),)
379 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
380 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
381 endif
383 # To make sure we do not include .config for any of the *config targets
384 # catch them early, and hand them over to scripts/kconfig/Makefile
385 # It is allowed to specify more targets when calling make, including
386 # mixing *config targets and build targets.
387 # For example 'make oldconfig all'.
388 # Detect when mixed targets is specified, and make a second invocation
389 # of make so .config is not included in this case either (for *config).
391 no-dot-config-targets := clean mrproper distclean \
392 cscope TAGS tags help %docs check% \
393 include/linux/version.h headers_% \
394 kernelrelease kernelversion
396 config-targets := 0
397 mixed-targets := 0
398 dot-config := 1
400 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
401 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
402 dot-config := 0
403 endif
404 endif
406 ifeq ($(KBUILD_EXTMOD),)
407 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
408 config-targets := 1
409 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
410 mixed-targets := 1
411 endif
412 endif
413 endif
415 ifeq ($(mixed-targets),1)
416 # ===========================================================================
417 # We're called with mixed targets (*config and build targets).
418 # Handle them one by one.
420 %:: FORCE
421 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
423 else
424 ifeq ($(config-targets),1)
425 # ===========================================================================
426 # *config targets only - make sure prerequisites are updated, and descend
427 # in scripts/kconfig to make the *config target
429 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
430 # KBUILD_DEFCONFIG may point out an alternative default configuration
431 # used for 'make defconfig'
432 include $(srctree)/arch/$(SRCARCH)/Makefile
433 export KBUILD_DEFCONFIG
435 config %config: scripts_basic outputmakefile FORCE
436 $(Q)mkdir -p include/linux include/config
437 $(Q)$(MAKE) $(build)=scripts/kconfig $@
439 else
440 # ===========================================================================
441 # Build targets only - this includes vmlinux, arch specific targets, clean
442 # targets and others. In general all targets except *config targets.
444 ifeq ($(KBUILD_EXTMOD),)
445 # Additional helpers built in scripts/
446 # Carefully list dependencies so we do not try to build scripts twice
447 # in parallel
448 PHONY += scripts
449 scripts: scripts_basic include/config/auto.conf
450 $(Q)$(MAKE) $(build)=$(@)
452 # Objects we will link into vmlinux / subdirs we need to visit
453 init-y := init/
454 drivers-y := drivers/ sound/ firmware/
455 net-y := net/
456 libs-y := lib/
457 core-y := usr/
458 endif # KBUILD_EXTMOD
460 ifeq ($(dot-config),1)
461 # Read in config
462 -include include/config/auto.conf
464 ifeq ($(KBUILD_EXTMOD),)
465 # Read in dependencies to all Kconfig* files, make sure to run
466 # oldconfig if changes are detected.
467 -include include/config/auto.conf.cmd
469 # To avoid any implicit rule to kick in, define an empty command
470 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
472 # If .config is newer than include/config/auto.conf, someone tinkered
473 # with it and forgot to run make oldconfig.
474 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
475 # we execute the config step to be sure to catch updated Kconfig files
476 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
477 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
478 else
479 # external modules needs include/linux/autoconf.h and include/config/auto.conf
480 # but do not care if they are up-to-date. Use auto.conf to trigger the test
481 PHONY += include/config/auto.conf
483 include/config/auto.conf:
484 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
485 echo; \
486 echo " ERROR: Kernel configuration is invalid."; \
487 echo " include/linux/autoconf.h or $@ are missing."; \
488 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
489 echo; \
490 /bin/false)
492 endif # KBUILD_EXTMOD
494 else
495 # Dummy target needed, because used as prerequisite
496 include/config/auto.conf: ;
497 endif # $(dot-config)
499 # The all: target is the default when no target is given on the
500 # command line.
501 # This allow a user to issue only 'make' to build a kernel including modules
502 # Defaults vmlinux but it is usually overridden in the arch makefile
503 all: vmlinux
505 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
506 KBUILD_CFLAGS += -Os
507 else
508 KBUILD_CFLAGS += -O2
509 endif
511 include $(srctree)/arch/$(SRCARCH)/Makefile
513 ifneq (CONFIG_FRAME_WARN,0)
514 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
515 endif
517 # Force gcc to behave correct even for buggy distributions
518 # Arch Makefiles may override this setting
519 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
521 ifdef CONFIG_FRAME_POINTER
522 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
523 else
524 KBUILD_CFLAGS += -fomit-frame-pointer
525 endif
527 ifdef CONFIG_DEBUG_INFO
528 KBUILD_CFLAGS += -g
529 KBUILD_AFLAGS += -gdwarf-2
530 endif
532 ifdef CONFIG_FTRACE
533 KBUILD_CFLAGS += -pg
534 endif
536 # We trigger additional mismatches with less inlining
537 ifdef CONFIG_DEBUG_SECTION_MISMATCH
538 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
539 endif
541 # arch Makefile may override CC so keep this after arch Makefile is included
542 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
543 CHECKFLAGS += $(NOSTDINC_FLAGS)
545 # warn about C99 declaration after statement
546 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
548 # disable pointer signed / unsigned warnings in gcc 4.0
549 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
551 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
552 # But warn user when we do so
553 warn-assign = \
554 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
556 ifneq ($(KCPPFLAGS),)
557 $(call warn-assign,CPPFLAGS)
558 KBUILD_CPPFLAGS += $(KCPPFLAGS)
559 endif
560 ifneq ($(KAFLAGS),)
561 $(call warn-assign,AFLAGS)
562 KBUILD_AFLAGS += $(KAFLAGS)
563 endif
564 ifneq ($(KCFLAGS),)
565 $(call warn-assign,CFLAGS)
566 KBUILD_CFLAGS += $(KCFLAGS)
567 endif
569 # Use --build-id when available.
570 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
571 $(call ld-option, -Wl$(comma)--build-id,))
572 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
573 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
575 # Default kernel image to build when no specific target is given.
576 # KBUILD_IMAGE may be overruled on the command line or
577 # set in the environment
578 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
579 # this default value
580 export KBUILD_IMAGE ?= vmlinux
583 # INSTALL_PATH specifies where to place the updated kernel and system map
584 # images. Default is /boot, but you can set it to other values
585 export INSTALL_PATH ?= /boot
588 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
589 # relocations required by build roots. This is not defined in the
590 # makefile but the argument can be passed to make if needed.
593 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
594 export MODLIB
597 # INSTALL_MOD_STRIP, if defined, will cause modules to be
598 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
599 # the default option --strip-debug will be used. Otherwise,
600 # INSTALL_MOD_STRIP will used as the options to the strip command.
602 ifdef INSTALL_MOD_STRIP
603 ifeq ($(INSTALL_MOD_STRIP),1)
604 mod_strip_cmd = $(STRIP) --strip-debug
605 else
606 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
607 endif # INSTALL_MOD_STRIP=1
608 else
609 mod_strip_cmd = true
610 endif # INSTALL_MOD_STRIP
611 export mod_strip_cmd
614 ifeq ($(KBUILD_EXTMOD),)
615 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
617 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
618 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
619 $(net-y) $(net-m) $(libs-y) $(libs-m)))
621 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
622 $(init-n) $(init-) \
623 $(core-n) $(core-) $(drivers-n) $(drivers-) \
624 $(net-n) $(net-) $(libs-n) $(libs-))))
626 init-y := $(patsubst %/, %/built-in.o, $(init-y))
627 core-y := $(patsubst %/, %/built-in.o, $(core-y))
628 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
629 net-y := $(patsubst %/, %/built-in.o, $(net-y))
630 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
631 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
632 libs-y := $(libs-y1) $(libs-y2)
634 # Build vmlinux
635 # ---------------------------------------------------------------------------
636 # vmlinux is built from the objects selected by $(vmlinux-init) and
637 # $(vmlinux-main). Most are built-in.o files from top-level directories
638 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
639 # Ordering when linking is important, and $(vmlinux-init) must be first.
641 # vmlinux
644 # +-< $(vmlinux-init)
645 # | +--< init/version.o + more
647 # +--< $(vmlinux-main)
648 # | +--< driver/built-in.o mm/built-in.o + more
650 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
652 # vmlinux version (uname -v) cannot be updated during normal
653 # descending-into-subdirs phase since we do not yet know if we need to
654 # update vmlinux.
655 # Therefore this step is delayed until just before final link of vmlinux -
656 # except in the kallsyms case where it is done just before adding the
657 # symbols to the kernel.
659 # System.map is generated to document addresses of all kernel symbols
661 vmlinux-init := $(head-y) $(init-y)
662 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
663 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
664 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
665 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
667 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
668 # May be overridden by arch/$(ARCH)/Makefile
669 quiet_cmd_vmlinux__ ?= LD $@
670 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
671 -T $(vmlinux-lds) $(vmlinux-init) \
672 --start-group $(vmlinux-main) --end-group \
673 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
675 # Generate new vmlinux version
676 quiet_cmd_vmlinux_version = GEN .version
677 cmd_vmlinux_version = set -e; \
678 if [ ! -r .version ]; then \
679 rm -f .version; \
680 echo 1 >.version; \
681 else \
682 mv .version .old_version; \
683 expr 0$$(cat .old_version) + 1 >.version; \
684 fi; \
685 $(MAKE) $(build)=init
687 # Generate System.map
688 quiet_cmd_sysmap = SYSMAP
689 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
691 # Link of vmlinux
692 # If CONFIG_KALLSYMS is set .version is already updated
693 # Generate System.map and verify that the content is consistent
694 # Use + in front of the vmlinux_version rule to silent warning with make -j2
695 # First command is ':' to allow us to use + in front of the rule
696 define rule_vmlinux__
698 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
700 $(call cmd,vmlinux__)
701 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
703 $(Q)$(if $($(quiet)cmd_sysmap), \
704 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
705 $(cmd_sysmap) $@ System.map; \
706 if [ $$? -ne 0 ]; then \
707 rm -f $@; \
708 /bin/false; \
710 $(verify_kallsyms)
711 endef
714 ifdef CONFIG_KALLSYMS
715 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
716 # It's a three stage process:
717 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
718 # empty
719 # Running kallsyms on that gives us .tmp_kallsyms1.o with
720 # the right size - vmlinux version (uname -v) is updated during this step
721 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
722 # but due to the added section, some addresses have shifted.
723 # From here, we generate a correct .tmp_kallsyms2.o
724 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
725 # o Verify that the System.map from vmlinux matches the map from
726 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
727 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
728 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
729 # temporary bypass to allow the kernel to be built while the
730 # maintainers work out what went wrong with kallsyms.
732 ifdef CONFIG_KALLSYMS_EXTRA_PASS
733 last_kallsyms := 3
734 else
735 last_kallsyms := 2
736 endif
738 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
740 define verify_kallsyms
741 $(Q)$(if $($(quiet)cmd_sysmap), \
742 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
743 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
744 $(Q)cmp -s System.map .tmp_System.map || \
745 (echo Inconsistent kallsyms data; \
746 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
747 rm .tmp_kallsyms* ; /bin/false )
748 endef
750 # Update vmlinux version before link
751 # Use + in front of this rule to silent warning about make -j1
752 # First command is ':' to allow us to use + in front of this rule
753 cmd_ksym_ld = $(cmd_vmlinux__)
754 define rule_ksym_ld
756 +$(call cmd,vmlinux_version)
757 $(call cmd,vmlinux__)
758 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
759 endef
761 # Generate .S file with all kernel symbols
762 quiet_cmd_kallsyms = KSYM $@
763 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
764 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
766 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
767 $(call if_changed_dep,as_o_S)
769 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
770 $(call cmd,kallsyms)
772 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
773 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
774 $(call if_changed_rule,ksym_ld)
776 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
777 $(call if_changed,vmlinux__)
779 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
780 $(call if_changed,vmlinux__)
782 # Needs to visit scripts/ before $(KALLSYMS) can be used.
783 $(KALLSYMS): scripts ;
785 # Generate some data for debugging strange kallsyms problems
786 debug_kallsyms: .tmp_map$(last_kallsyms)
788 .tmp_map%: .tmp_vmlinux% FORCE
789 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
791 .tmp_map3: .tmp_map2
793 .tmp_map2: .tmp_map1
795 endif # ifdef CONFIG_KALLSYMS
797 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
798 # relevant sections renamed as per the linker script.
799 quiet_cmd_vmlinux-modpost = LD $@
800 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
801 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
802 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
803 define rule_vmlinux-modpost
805 +$(call cmd,vmlinux-modpost)
806 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
807 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
808 endef
810 # vmlinux image - including updated kernel symbols
811 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
812 ifdef CONFIG_HEADERS_CHECK
813 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
814 endif
815 ifdef CONFIG_SAMPLES
816 $(Q)$(MAKE) $(build)=samples
817 endif
818 $(call vmlinux-modpost)
819 $(call if_changed_rule,vmlinux__)
820 $(Q)rm -f .old_version
822 # build vmlinux.o first to catch section mismatch errors early
823 ifdef CONFIG_KALLSYMS
824 .tmp_vmlinux1: vmlinux.o
825 endif
827 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
828 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
829 $(call if_changed_rule,vmlinux-modpost)
831 # The actual objects are generated when descending,
832 # make sure no implicit rule kicks in
833 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
835 # Handle descending into subdirectories listed in $(vmlinux-dirs)
836 # Preset locale variables to speed up the build process. Limit locale
837 # tweaks to this spot to avoid wrong language settings when running
838 # make menuconfig etc.
839 # Error messages still appears in the original language
841 PHONY += $(vmlinux-dirs)
842 $(vmlinux-dirs): prepare scripts
843 $(Q)$(MAKE) $(build)=$@
845 # Build the kernel release string
847 # The KERNELRELEASE value built here is stored in the file
848 # include/config/kernel.release, and is used when executing several
849 # make targets, such as "make install" or "make modules_install."
851 # The eventual kernel release string consists of the following fields,
852 # shown in a hierarchical format to show how smaller parts are concatenated
853 # to form the larger and final value, with values coming from places like
854 # the Makefile, kernel config options, make command line options and/or
855 # SCM tag information.
857 # $(KERNELVERSION)
858 # $(VERSION) eg, 2
859 # $(PATCHLEVEL) eg, 6
860 # $(SUBLEVEL) eg, 18
861 # $(EXTRAVERSION) eg, -rc6
862 # $(localver-full)
863 # $(localver)
864 # localversion* (files without backups, containing '~')
865 # $(CONFIG_LOCALVERSION) (from kernel config setting)
866 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
867 # ./scripts/setlocalversion (SCM tag, if one exists)
868 # $(LOCALVERSION) (from make command line if provided)
870 # Note how the final $(localver-auto) string is included *only* if the
871 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
872 # moment, only git is supported but other SCMs can edit the script
873 # scripts/setlocalversion and add the appropriate checks as needed.
875 pattern = ".*/localversion[^~]*"
876 string = $(shell cat /dev/null \
877 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
879 localver = $(subst $(space),, $(string) \
880 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
882 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
883 # and if the SCM is know a tag from the SCM is appended.
884 # The appended tag is determined by the SCM used.
886 # Currently, only git is supported.
887 # Other SCMs can edit scripts/setlocalversion and add the appropriate
888 # checks as needed.
889 ifdef CONFIG_LOCALVERSION_AUTO
890 _localver-auto = $(shell $(CONFIG_SHELL) \
891 $(srctree)/scripts/setlocalversion $(srctree))
892 localver-auto = $(LOCALVERSION)$(_localver-auto)
893 endif
895 localver-full = $(localver)$(localver-auto)
897 # Store (new) KERNELRELASE string in include/config/kernel.release
898 kernelrelease = $(KERNELVERSION)$(localver-full)
899 include/config/kernel.release: include/config/auto.conf FORCE
900 $(Q)rm -f $@
901 $(Q)echo $(kernelrelease) > $@
904 # Things we need to do before we recursively start building the kernel
905 # or the modules are listed in "prepare".
906 # A multi level approach is used. prepareN is processed before prepareN-1.
907 # archprepare is used in arch Makefiles and when processed asm symlink,
908 # version.h and scripts_basic is processed / created.
910 # Listed in dependency order
911 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
913 # prepare3 is used to check if we are building in a separate output directory,
914 # and if so do:
915 # 1) Check that make has not been executed in the kernel src $(srctree)
916 # 2) Create the include2 directory, used for the second asm symlink
917 prepare3: include/config/kernel.release
918 ifneq ($(KBUILD_SRC),)
919 @echo ' Using $(srctree) as source for kernel'
920 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
921 echo " $(srctree) is not clean, please run 'make mrproper'";\
922 echo " in the '$(srctree)' directory.";\
923 /bin/false; \
925 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
926 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
927 endif
929 # prepare2 creates a makefile if using a separate output directory
930 prepare2: prepare3 outputmakefile
932 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
933 include/asm include/config/auto.conf
934 $(cmd_crmodverdir)
936 archprepare: prepare1 scripts_basic
938 prepare0: archprepare FORCE
939 $(Q)$(MAKE) $(build)=.
940 $(Q)$(MAKE) $(build)=. missing-syscalls
942 # All the preparing..
943 prepare: prepare0
945 # Leave this as default for preprocessing vmlinux.lds.S, which is now
946 # done in arch/$(ARCH)/kernel/Makefile
948 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
950 # The asm symlink changes when $(ARCH) changes.
951 # Detect this and ask user to run make mrproper
953 include/asm: FORCE
954 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
955 if [ -L include/asm ]; then \
956 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
957 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
958 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
959 exit 1; \
960 fi; \
961 else \
962 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
963 if [ ! -d include ]; then \
964 mkdir -p include; \
965 fi; \
966 ln -fsn asm-$(SRCARCH) $@; \
969 # Generate some files
970 # ---------------------------------------------------------------------------
972 # KERNELRELEASE can change from a few different places, meaning version.h
973 # needs to be updated, so this check is forced on all builds
975 uts_len := 64
976 define filechk_utsrelease.h
977 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
978 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
979 exit 1; \
980 fi; \
981 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
982 endef
984 define filechk_version.h
985 (echo \#define LINUX_VERSION_CODE $(shell \
986 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
987 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
988 endef
990 include/linux/version.h: $(srctree)/Makefile FORCE
991 $(call filechk,version.h)
993 include/linux/utsrelease.h: include/config/kernel.release FORCE
994 $(call filechk,utsrelease.h)
996 # ---------------------------------------------------------------------------
998 PHONY += depend dep
999 depend dep:
1000 @echo '*** Warning: make $@ is unnecessary now.'
1002 # ---------------------------------------------------------------------------
1003 # Firmware install
1004 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1005 export INSTALL_FW_PATH
1007 PHONY += firmware_install
1008 firmware_install: FORCE
1009 @mkdir -p $(objtree)/firmware
1010 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1012 # ---------------------------------------------------------------------------
1013 # Kernel headers
1014 INSTALL_HDR_PATH=$(objtree)/usr
1015 export INSTALL_HDR_PATH
1017 HDRFILTER=generic i386 x86_64
1018 HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
1020 PHONY += headers_install_all
1021 headers_install_all: include/linux/version.h scripts_basic FORCE
1022 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1023 $(Q)for arch in $(HDRARCHES); do \
1024 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
1025 done
1027 PHONY += headers_install
1028 headers_install: include/linux/version.h scripts_basic FORCE
1029 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1030 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
1031 exit 1 ; fi
1032 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1033 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
1035 PHONY += headers_check_all
1036 headers_check_all: headers_install_all
1037 $(Q)for arch in $(HDRARCHES); do \
1038 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1039 done
1041 PHONY += headers_check
1042 headers_check: headers_install
1043 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
1045 # ---------------------------------------------------------------------------
1046 # Modules
1048 ifdef CONFIG_MODULES
1050 # By default, build modules as well
1052 all: modules
1054 # Build modules
1056 # A module can be listed more than once in obj-m resulting in
1057 # duplicate lines in modules.order files. Those are removed
1058 # using awk while concatenating to the final file.
1060 PHONY += modules
1061 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1062 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1063 @echo ' Building modules, stage 2.';
1064 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1067 # Target to prepare building external modules
1068 PHONY += modules_prepare
1069 modules_prepare: prepare scripts
1071 # Target to install modules
1072 PHONY += modules_install
1073 modules_install: _modinst_ _modinst_post
1075 PHONY += _modinst_
1076 _modinst_:
1077 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1078 echo "Warning: you may need to install module-init-tools"; \
1079 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1080 sleep 1; \
1082 @rm -rf $(MODLIB)/kernel
1083 @rm -f $(MODLIB)/source
1084 @mkdir -p $(MODLIB)/kernel
1085 @ln -s $(srctree) $(MODLIB)/source
1086 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1087 rm -f $(MODLIB)/build ; \
1088 ln -s $(objtree) $(MODLIB)/build ; \
1090 @cp -f $(objtree)/modules.order $(MODLIB)/
1091 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1093 # This depmod is only for convenience to give the initial
1094 # boot a modules.dep even before / is mounted read-write. However the
1095 # boot script depmod is the master version.
1096 PHONY += _modinst_post
1097 _modinst_post: _modinst_
1098 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1099 $(call cmd,depmod)
1101 else # CONFIG_MODULES
1103 # Modules not configured
1104 # ---------------------------------------------------------------------------
1106 modules modules_install: FORCE
1107 @echo
1108 @echo "The present kernel configuration has modules disabled."
1109 @echo "Type 'make config' and enable loadable module support."
1110 @echo "Then build a kernel with module support enabled."
1111 @echo
1112 @exit 1
1114 endif # CONFIG_MODULES
1117 # Cleaning is done on three levels.
1118 # make clean Delete most generated files
1119 # Leave enough to build external modules
1120 # make mrproper Delete the current configuration, and all generated files
1121 # make distclean Remove editor backup files, patch leftover files and the like
1123 # Directories & files removed with 'make clean'
1124 CLEAN_DIRS += $(MODVERDIR)
1125 CLEAN_FILES += vmlinux System.map \
1126 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1128 # Directories & files removed with 'make mrproper'
1129 MRPROPER_DIRS += include/config include2 usr/include
1130 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1131 include/linux/autoconf.h include/linux/version.h \
1132 include/linux/utsrelease.h \
1133 include/linux/bounds.h include/asm*/asm-offsets.h \
1134 Module.symvers tags TAGS cscope*
1136 # clean - Delete most, but leave enough to build external modules
1138 clean: rm-dirs := $(CLEAN_DIRS)
1139 clean: rm-files := $(CLEAN_FILES)
1140 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1142 PHONY += $(clean-dirs) clean archclean
1143 $(clean-dirs):
1144 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1146 clean: archclean $(clean-dirs)
1147 $(call cmd,rmdirs)
1148 $(call cmd,rmfiles)
1149 @find . $(RCS_FIND_IGNORE) \
1150 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1151 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1152 -o -name '*.symtypes' -o -name 'modules.order' \) \
1153 -type f -print | xargs rm -f
1155 # mrproper - Delete all generated files, including .config
1157 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1158 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1159 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1161 PHONY += $(mrproper-dirs) mrproper archmrproper
1162 $(mrproper-dirs):
1163 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1165 mrproper: clean archmrproper $(mrproper-dirs)
1166 $(call cmd,rmdirs)
1167 $(call cmd,rmfiles)
1169 # distclean
1171 PHONY += distclean
1173 distclean: mrproper
1174 @find $(srctree) $(RCS_FIND_IGNORE) \
1175 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1176 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1177 -o -name '.*.rej' -o -size 0 \
1178 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1179 -type f -print | xargs rm -f
1182 # Packaging of the kernel to various formats
1183 # ---------------------------------------------------------------------------
1184 # rpm target kept for backward compatibility
1185 package-dir := $(srctree)/scripts/package
1187 %pkg: include/config/kernel.release FORCE
1188 $(Q)$(MAKE) $(build)=$(package-dir) $@
1189 rpm: include/config/kernel.release FORCE
1190 $(Q)$(MAKE) $(build)=$(package-dir) $@
1193 # Brief documentation of the typical targets used
1194 # ---------------------------------------------------------------------------
1196 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1197 boards := $(notdir $(boards))
1198 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1199 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1201 help:
1202 @echo 'Cleaning targets:'
1203 @echo ' clean - Remove most generated files but keep the config and'
1204 @echo ' enough build support to build external modules'
1205 @echo ' mrproper - Remove all generated files + config + various backup files'
1206 @echo ' distclean - mrproper + remove editor backup and patch files'
1207 @echo ''
1208 @echo 'Configuration targets:'
1209 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1210 @echo ''
1211 @echo 'Other generic targets:'
1212 @echo ' all - Build all targets marked with [*]'
1213 @echo '* vmlinux - Build the bare kernel'
1214 @echo '* modules - Build all modules'
1215 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1216 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1217 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1218 @echo ' dir/ - Build all files in dir and below'
1219 @echo ' dir/file.[ois] - Build specified target only'
1220 @echo ' dir/file.ko - Build module including final link'
1221 @echo ' prepare - Set up for building external modules'
1222 @echo ' tags/TAGS - Generate tags file for editors'
1223 @echo ' cscope - Generate cscope index'
1224 @echo ' kernelrelease - Output the release version string'
1225 @echo ' kernelversion - Output the version stored in Makefile'
1226 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1227 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1228 echo ' (default: $(INSTALL_HDR_PATH))'; \
1230 @echo ''
1231 @echo 'Static analysers'
1232 @echo ' checkstack - Generate a list of stack hogs'
1233 @echo ' namespacecheck - Name space analysis on compiled kernel'
1234 @echo ' versioncheck - Sanity check on version.h usage'
1235 @echo ' includecheck - Check for duplicate included header files'
1236 @echo ' export_report - List the usages of all exported symbols'
1237 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1238 echo ' headers_check - Sanity check on exported headers'; \
1240 @echo ''
1241 @echo 'Kernel packaging:'
1242 @$(MAKE) $(build)=$(package-dir) help
1243 @echo ''
1244 @echo 'Documentation targets:'
1245 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1246 @echo ''
1247 @echo 'Architecture specific targets ($(SRCARCH)):'
1248 @$(if $(archhelp),$(archhelp),\
1249 echo ' No architecture specific help defined for $(SRCARCH)')
1250 @echo ''
1251 @$(if $(boards), \
1252 $(foreach b, $(boards), \
1253 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1254 echo '')
1255 @$(if $(board-dirs), \
1256 $(foreach b, $(board-dirs), \
1257 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1258 printf " %-16s - Show all of the above\\n" help-boards; \
1259 echo '')
1261 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1262 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1263 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1264 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1265 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1266 @echo ''
1267 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1268 @echo 'For further info see the ./README file'
1271 help-board-dirs := $(addprefix help-,$(board-dirs))
1273 help-boards: $(help-board-dirs)
1275 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1277 $(help-board-dirs): help-%:
1278 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1279 @$(if $(boards-per-dir), \
1280 $(foreach b, $(boards-per-dir), \
1281 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1282 echo '')
1285 # Documentation targets
1286 # ---------------------------------------------------------------------------
1287 %docs: scripts_basic FORCE
1288 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1290 else # KBUILD_EXTMOD
1293 # External module support.
1294 # When building external modules the kernel used as basis is considered
1295 # read-only, and no consistency checks are made and the make
1296 # system is not used on the basis kernel. If updates are required
1297 # in the basis kernel ordinary make commands (without M=...) must
1298 # be used.
1300 # The following are the only valid targets when building external
1301 # modules.
1302 # make M=dir clean Delete all automatically generated files
1303 # make M=dir modules Make all modules in specified dir
1304 # make M=dir Same as 'make M=dir modules'
1305 # make M=dir modules_install
1306 # Install the modules built in the module directory
1307 # Assumes install directory is already created
1309 # We are always building modules
1310 KBUILD_MODULES := 1
1311 PHONY += crmodverdir
1312 crmodverdir:
1313 $(cmd_crmodverdir)
1315 PHONY += $(objtree)/Module.symvers
1316 $(objtree)/Module.symvers:
1317 @test -e $(objtree)/Module.symvers || ( \
1318 echo; \
1319 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1320 echo " is missing; modules will have no dependencies and modversions."; \
1321 echo )
1323 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1324 PHONY += $(module-dirs) modules
1325 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1326 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1328 modules: $(module-dirs)
1329 @echo ' Building modules, stage 2.';
1330 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1332 PHONY += modules_install
1333 modules_install: _emodinst_ _emodinst_post
1335 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1336 PHONY += _emodinst_
1337 _emodinst_:
1338 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1339 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1341 PHONY += _emodinst_post
1342 _emodinst_post: _emodinst_
1343 $(call cmd,depmod)
1345 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1347 PHONY += $(clean-dirs) clean
1348 $(clean-dirs):
1349 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1351 clean: rm-dirs := $(MODVERDIR)
1352 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1353 clean: $(clean-dirs)
1354 $(call cmd,rmdirs)
1355 $(call cmd,rmfiles)
1356 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1357 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1358 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1359 -type f -print | xargs rm -f
1361 help:
1362 @echo ' Building external modules.'
1363 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1364 @echo ''
1365 @echo ' modules - default target, build the module(s)'
1366 @echo ' modules_install - install the module'
1367 @echo ' clean - remove generated files in module directory only'
1368 @echo ''
1370 # Dummies...
1371 PHONY += prepare scripts
1372 prepare: ;
1373 scripts: ;
1374 endif # KBUILD_EXTMOD
1376 # Generate tags for editors
1377 # ---------------------------------------------------------------------------
1379 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1380 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1381 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1383 ifeq ($(src),$(obj))
1384 __srctree =
1385 else
1386 __srctree = $(srctree)/
1387 endif
1389 ifeq ($(ALLSOURCE_ARCHS),)
1390 ifeq ($(ARCH),um)
1391 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1392 else
1393 ALLINCLUDE_ARCHS := $(SRCARCH)
1394 endif
1395 else
1396 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1397 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1398 endif
1400 ALLSOURCE_ARCHS := $(SRCARCH)
1402 define find-sources
1403 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1404 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1405 -name $1 -print; \
1406 done ; \
1407 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1408 -name $1 -print; \
1409 find $(__srctree)include $(RCS_FIND_IGNORE) \
1410 \( -name config -o -name 'asm-*' \) -prune \
1411 -o -name $1 -print; \
1412 for arch in $(ALLINCLUDE_ARCHS) ; do \
1413 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1414 -name $1 -print; \
1415 done ; \
1416 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1417 -name $1 -print; \
1418 find $(__srctree) $(RCS_FIND_IGNORE) \
1419 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1420 -name $1 -print; \
1422 endef
1424 define all-sources
1425 $(call find-sources,'*.[chS]')
1426 endef
1427 define all-kconfigs
1428 $(call find-sources,'Kconfig*')
1429 endef
1430 define all-defconfigs
1431 $(call find-sources,'defconfig')
1432 endef
1434 define xtags
1435 if $1 --version 2>&1 | grep -iq exuberant; then \
1436 $(all-sources) | xargs $1 -a \
1437 -I __initdata,__exitdata,__acquires,__releases \
1438 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1439 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1440 --extra=+f --c-kinds=+px \
1441 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1442 $(all-kconfigs) | xargs $1 -a \
1443 --langdef=kconfig \
1444 --language-force=kconfig \
1445 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
1446 $(all-defconfigs) | xargs -r $1 -a \
1447 --langdef=dotconfig \
1448 --language-force=dotconfig \
1449 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1450 elif $1 --version 2>&1 | grep -iq emacs; then \
1451 $(all-sources) | xargs $1 -a; \
1452 $(all-kconfigs) | xargs $1 -a \
1453 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
1454 $(all-defconfigs) | xargs -r $1 -a \
1455 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1456 else \
1457 $(all-sources) | xargs $1 -a; \
1459 endef
1461 quiet_cmd_cscope-file = FILELST cscope.files
1462 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1464 quiet_cmd_cscope = MAKE cscope.out
1465 cmd_cscope = cscope -b
1467 cscope: FORCE
1468 $(call cmd,cscope-file)
1469 $(call cmd,cscope)
1471 quiet_cmd_TAGS = MAKE $@
1472 define cmd_TAGS
1473 rm -f $@; \
1474 $(call xtags,etags)
1475 endef
1477 TAGS: FORCE
1478 $(call cmd,TAGS)
1480 quiet_cmd_tags = MAKE $@
1481 define cmd_tags
1482 rm -f $@; \
1483 $(call xtags,ctags)
1484 endef
1486 tags: FORCE
1487 $(call cmd,tags)
1490 # Scripts to check various things for consistency
1491 # ---------------------------------------------------------------------------
1493 includecheck:
1494 find * $(RCS_FIND_IGNORE) \
1495 -name '*.[hcS]' -type f -print | sort \
1496 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1498 versioncheck:
1499 find * $(RCS_FIND_IGNORE) \
1500 -name '*.[hcS]' -type f -print | sort \
1501 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1503 namespacecheck:
1504 $(PERL) $(srctree)/scripts/namespace.pl
1506 export_report:
1507 $(PERL) $(srctree)/scripts/export_report.pl
1509 endif #ifeq ($(config-targets),1)
1510 endif #ifeq ($(mixed-targets),1)
1512 PHONY += checkstack kernelrelease kernelversion
1514 # UML needs a little special treatment here. It wants to use the host
1515 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1516 # else wants $(ARCH), including people doing cross-builds, which means
1517 # that $(SUBARCH) doesn't work here.
1518 ifeq ($(ARCH), um)
1519 CHECKSTACK_ARCH := $(SUBARCH)
1520 else
1521 CHECKSTACK_ARCH := $(ARCH)
1522 endif
1523 checkstack:
1524 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1525 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1527 kernelrelease:
1528 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1529 $(error kernelrelease not valid - run 'make prepare' to update it))
1530 kernelversion:
1531 @echo $(KERNELVERSION)
1533 # Single targets
1534 # ---------------------------------------------------------------------------
1535 # Single targets are compatible with:
1536 # - build with mixed source and output
1537 # - build with separate output dir 'make O=...'
1538 # - external modules
1540 # target-dir => where to store outputfile
1541 # build-dir => directory in kernel source tree to use
1543 ifeq ($(KBUILD_EXTMOD),)
1544 build-dir = $(patsubst %/,%,$(dir $@))
1545 target-dir = $(dir $@)
1546 else
1547 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1548 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1549 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1550 endif
1552 %.s: %.c prepare scripts FORCE
1553 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1554 %.i: %.c prepare scripts FORCE
1555 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1556 %.o: %.c prepare scripts FORCE
1557 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1558 %.lst: %.c prepare scripts FORCE
1559 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1560 %.s: %.S prepare scripts FORCE
1561 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1562 %.o: %.S prepare scripts FORCE
1563 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1564 %.symtypes: %.c prepare scripts FORCE
1565 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1567 # Modules
1568 / %/: prepare scripts FORCE
1569 $(cmd_crmodverdir)
1570 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1571 $(build)=$(build-dir)
1572 %.ko: prepare scripts FORCE
1573 $(cmd_crmodverdir)
1574 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1575 $(build)=$(build-dir) $(@:.ko=.o)
1576 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1578 # FIXME Should go into a make.lib or something
1579 # ===========================================================================
1581 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1582 cmd_rmdirs = rm -rf $(rm-dirs)
1584 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1585 cmd_rmfiles = rm -f $(rm-files)
1587 # Run depmod only if we have System.map and depmod is executable
1588 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1589 cmd_depmod = \
1590 if [ -r System.map -a -x $(DEPMOD) ]; then \
1591 $(DEPMOD) -ae -F System.map \
1592 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1593 $(KERNELRELEASE); \
1596 # Create temporary dir for module support files
1597 # clean it up only when building all modules
1598 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1599 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1601 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1602 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1603 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1605 quiet_cmd_as_o_S = AS $@
1606 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1608 # read all saved command lines
1610 targets := $(wildcard $(sort $(targets)))
1611 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1613 ifneq ($(cmd_files),)
1614 $(cmd_files): ; # Do not try to update included dependency files
1615 include $(cmd_files)
1616 endif
1618 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1619 # Usage:
1620 # $(Q)$(MAKE) $(clean)=dir
1621 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1623 endif # skip-makefile
1625 PHONY += FORCE
1626 FORCE:
1628 # Declare the contents of the .PHONY variable as phony. We keep that
1629 # information in a variable se we can use it in if_changed and friends.
1630 .PHONY: $(PHONY)