]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - Makefile
kbuild: mips use generic asm-offsets.h support
[mirror_ubuntu-artful-kernel.git] / Makefile
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 13
4 EXTRAVERSION =
5 NAME=Affluent Albatross
6
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.
12
13 # Do not print "Entering directory ..."
14 MAKEFLAGS += --no-print-directory
15
16 # We are using a recursive build, so we need to do a little thinking
17 # to get the ordering right.
18 #
19 # Most importantly: sub-Makefiles should only ever modify files in
20 # their own directory. If in some directory we have a dependency on
21 # a file in another dir (which doesn't happen often, but it's often
22 # unavoidable when linking the built-in.o targets which finally
23 # turn into vmlinux), we will call a sub make in that other dir, and
24 # after that we are sure that everything which is in that other dir
25 # is now up to date.
26 #
27 # The only cases where we need to modify files which have global
28 # effects are thus separated out and done before the recursive
29 # descending is started. They are now explicitly listed as the
30 # prepare rule.
31
32 # To put more focus on warnings, be less verbose as default
33 # Use 'make V=1' to see the full commands
34
35 ifdef V
36 ifeq ("$(origin V)", "command line")
37 KBUILD_VERBOSE = $(V)
38 endif
39 endif
40 ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42 endif
43
44 # Call sparse as part of compilation of C files
45 # Use 'make C=1' to enable sparse checking
46
47 ifdef C
48 ifeq ("$(origin C)", "command line")
49 KBUILD_CHECKSRC = $(C)
50 endif
51 endif
52 ifndef KBUILD_CHECKSRC
53 KBUILD_CHECKSRC = 0
54 endif
55
56 # Use make M=dir to specify directory of external module to build
57 # Old syntax make ... SUBDIRS=$PWD is still supported
58 # Setting the environment variable KBUILD_EXTMOD take precedence
59 ifdef SUBDIRS
60 KBUILD_EXTMOD ?= $(SUBDIRS)
61 endif
62 ifdef M
63 ifeq ("$(origin M)", "command line")
64 KBUILD_EXTMOD := $(M)
65 endif
66 endif
67
68
69 # kbuild supports saving output files in a separate directory.
70 # To locate output files in a separate directory two syntaxes are supported.
71 # In both cases the working directory must be the root of the kernel src.
72 # 1) O=
73 # Use "make O=dir/to/store/output/files/"
74 #
75 # 2) Set KBUILD_OUTPUT
76 # Set the environment variable KBUILD_OUTPUT to point to the directory
77 # where the output files shall be placed.
78 # export KBUILD_OUTPUT=dir/to/store/output/files/
79 # make
80 #
81 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
82 # variable.
83
84
85 # KBUILD_SRC is set on invocation of make in OBJ directory
86 # KBUILD_SRC is not intended to be used by the regular user (for now)
87 ifeq ($(KBUILD_SRC),)
88
89 # OK, Make called in directory where kernel src resides
90 # Do we want to locate output files in a separate directory?
91 ifdef O
92 ifeq ("$(origin O)", "command line")
93 KBUILD_OUTPUT := $(O)
94 endif
95 endif
96
97 # That's our default target when none is given on the command line
98 .PHONY: _all
99 _all:
100
101 ifneq ($(KBUILD_OUTPUT),)
102 # Invoke a second make in the output directory, passing relevant variables
103 # check that the output directory actually exists
104 saved-output := $(KBUILD_OUTPUT)
105 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
106 $(if $(KBUILD_OUTPUT),, \
107 $(error output directory "$(saved-output)" does not exist))
108
109 .PHONY: $(MAKECMDGOALS)
110
111 $(filter-out _all,$(MAKECMDGOALS)) _all:
112 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
113 KBUILD_SRC=$(CURDIR) \
114 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
115
116 # Leave processing to above invocation of make
117 skip-makefile := 1
118 endif # ifneq ($(KBUILD_OUTPUT),)
119 endif # ifeq ($(KBUILD_SRC),)
120
121 # We process the rest of the Makefile if this is the final invocation of make
122 ifeq ($(skip-makefile),)
123
124 # If building an external module we do not care about the all: rule
125 # but instead _all depend on modules
126 .PHONY: all
127 ifeq ($(KBUILD_EXTMOD),)
128 _all: all
129 else
130 _all: modules
131 endif
132
133 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
134 TOPDIR := $(srctree)
135 # FIXME - TOPDIR is obsolete, use srctree/objtree
136 objtree := $(CURDIR)
137 src := $(srctree)
138 obj := $(objtree)
139
140 VPATH := $(srctree)
141
142 export srctree objtree VPATH TOPDIR
143
144 nullstring :=
145 space := $(nullstring) # end of line
146
147 # Take the contents of any files called localversion* and the config
148 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
149 # careful not to include files twice if building in the source
150 # directory. LOCALVERSION from the command line override all of this
151
152 localver := $(objtree)/localversion* $(srctree)/localversion*
153 localver := $(sort $(wildcard $(localver)))
154 # skip backup files (containing '~')
155 localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f)))
156
157 LOCALVERSION = $(subst $(space),, \
158 $(shell cat /dev/null $(localver)) \
159 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
160
161 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
162
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.
168
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
173 # Cross compiling and selecting different set of gcc/bin-utils
174 # ---------------------------------------------------------------------------
175 #
176 # When performing cross compilation for other architectures ARCH shall be set
177 # to the target architecture. (See arch/* for the possibilities).
178 # ARCH can be set during invocation of make:
179 # make ARCH=ia64
180 # Another way is to have ARCH set in the environment.
181 # The default ARCH is the host where make is executed.
182
183 # CROSS_COMPILE specify the prefix used for all executables used
184 # during compilation. Only gcc and related bin-utils executables
185 # are prefixed with $(CROSS_COMPILE).
186 # CROSS_COMPILE can be set on the command line
187 # make CROSS_COMPILE=ia64-linux-
188 # Alternatively CROSS_COMPILE can be set in the environment.
189 # Default value for CROSS_COMPILE is not to prefix executables
190 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
191
192 ARCH ?= $(SUBARCH)
193 CROSS_COMPILE ?=
194
195 # Architecture as present in compile.h
196 UTS_MACHINE := $(ARCH)
197
198 # SHELL used by kbuild
199 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
200 else if [ -x /bin/bash ]; then echo /bin/bash; \
201 else echo sh; fi ; fi)
202
203 HOSTCC = gcc
204 HOSTCXX = g++
205 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
206 HOSTCXXFLAGS = -O2
207
208 # Decide whether to build built-in, modular, or both.
209 # Normally, just do built-in.
210
211 KBUILD_MODULES :=
212 KBUILD_BUILTIN := 1
213
214 # If we have only "make modules", don't compile built-in objects.
215 # When we're building modules with modversions, we need to consider
216 # the built-in objects during the descend as well, in order to
217 # make sure the checksums are uptodate before we record them.
218
219 ifeq ($(MAKECMDGOALS),modules)
220 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
221 endif
222
223 # If we have "make <whatever> modules", compile modules
224 # in addition to whatever we do anyway.
225 # Just "make" or "make all" shall build modules as well
226
227 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
228 KBUILD_MODULES := 1
229 endif
230
231 ifeq ($(MAKECMDGOALS),)
232 KBUILD_MODULES := 1
233 endif
234
235 export KBUILD_MODULES KBUILD_BUILTIN
236 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
237
238 # Beautify output
239 # ---------------------------------------------------------------------------
240 #
241 # Normally, we echo the whole command before executing it. By making
242 # that echo $($(quiet)$(cmd)), we now have the possibility to set
243 # $(quiet) to choose other forms of output instead, e.g.
244 #
245 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
246 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
247 #
248 # If $(quiet) is empty, the whole command will be printed.
249 # If it is set to "quiet_", only the short version will be printed.
250 # If it is set to "silent_", nothing wil be printed at all, since
251 # the variable $(silent_cmd_cc_o_c) doesn't exist.
252 #
253 # A simple variant is to prefix commands with $(Q) - that's usefull
254 # for commands that shall be hidden in non-verbose mode.
255 #
256 # $(Q)ln $@ :<
257 #
258 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
259 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
260
261 ifeq ($(KBUILD_VERBOSE),1)
262 quiet =
263 Q =
264 else
265 quiet=quiet_
266 Q = @
267 endif
268
269 # If the user is running make -s (silent mode), suppress echoing of
270 # commands
271
272 ifneq ($(findstring s,$(MAKEFLAGS)),)
273 quiet=silent_
274 endif
275
276 export quiet Q KBUILD_VERBOSE
277
278 ######
279 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
280 # See documentation in Documentation/kbuild/makefiles.txt
281
282 # cc-option
283 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
284
285 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
286 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
287
288 # For backward compatibility
289 check_gcc = $(warning check_gcc is deprecated - use cc-option) \
290 $(call cc-option, $(1),$(2))
291
292 # cc-option-yn
293 # Usage: flag := $(call cc-option-yn, -march=winchip-c6)
294 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
295 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
296
297 # cc-option-align
298 # Prefix align with either -falign or -malign
299 cc-option-align = $(subst -functions=0,,\
300 $(call cc-option,-falign-functions=0,-malign-functions=0))
301
302 # cc-version
303 # Usage gcc-ver := $(call cc-version $(CC))
304 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
305 $(if $(1), $(1), $(CC)))
306
307
308 # Look for make include files relative to root of kernel src
309 MAKEFLAGS += --include-dir=$(srctree)
310
311 # We need some generic definitions
312 include $(srctree)/scripts/Kbuild.include
313
314 # For maximum performance (+ possibly random breakage, uncomment
315 # the following)
316
317 #MAKEFLAGS += -rR
318
319 # Make variables (CC, etc...)
320
321 AS = $(CROSS_COMPILE)as
322 LD = $(CROSS_COMPILE)ld
323 CC = $(CROSS_COMPILE)gcc
324 CPP = $(CC) -E
325 AR = $(CROSS_COMPILE)ar
326 NM = $(CROSS_COMPILE)nm
327 STRIP = $(CROSS_COMPILE)strip
328 OBJCOPY = $(CROSS_COMPILE)objcopy
329 OBJDUMP = $(CROSS_COMPILE)objdump
330 AWK = awk
331 GENKSYMS = scripts/genksyms/genksyms
332 DEPMOD = /sbin/depmod
333 KALLSYMS = scripts/kallsyms
334 PERL = perl
335 CHECK = sparse
336
337 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__
338 MODFLAGS = -DMODULE
339 CFLAGS_MODULE = $(MODFLAGS)
340 AFLAGS_MODULE = $(MODFLAGS)
341 LDFLAGS_MODULE = -r
342 CFLAGS_KERNEL =
343 AFLAGS_KERNEL =
344
345
346 # Use LINUXINCLUDE when you must reference the include/ directory.
347 # Needed to be compatible with the O= option
348 LINUXINCLUDE := -Iinclude \
349 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include)
350
351 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
352
353 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
354 -fno-strict-aliasing -fno-common \
355 -ffreestanding
356 AFLAGS := -D__ASSEMBLY__
357
358 export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
359 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
360 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
361 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
362
363 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
364 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
365 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
366
367 # When compiling out-of-tree modules, put MODVERDIR in the module
368 # tree rather than in the kernel tree. The kernel tree might
369 # even be read-only.
370 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
371
372 # Files to ignore in find ... statements
373
374 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg \) -prune -o
375 RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg
376
377 # ===========================================================================
378 # Rules shared between *config targets and build targets
379
380 # Basic helpers built in scripts/
381 .PHONY: scripts_basic
382 scripts_basic:
383 $(Q)$(MAKE) $(build)=scripts/basic
384
385 .PHONY: outputmakefile
386 # outputmakefile generate a Makefile to be placed in output directory, if
387 # using a seperate output directory. This allows convinient use
388 # of make in output directory
389 outputmakefile:
390 $(Q)if test ! $(srctree) -ef $(objtree); then \
391 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
392 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
393 > $(objtree)/Makefile; \
394 echo ' GEN $(objtree)/Makefile'; \
395 fi
396
397 # To make sure we do not include .config for any of the *config targets
398 # catch them early, and hand them over to scripts/kconfig/Makefile
399 # It is allowed to specify more targets when calling make, including
400 # mixing *config targets and build targets.
401 # For example 'make oldconfig all'.
402 # Detect when mixed targets is specified, and make a second invocation
403 # of make so .config is not included in this case either (for *config).
404
405 no-dot-config-targets := clean mrproper distclean \
406 cscope TAGS tags help %docs check%
407
408 config-targets := 0
409 mixed-targets := 0
410 dot-config := 1
411
412 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
413 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
414 dot-config := 0
415 endif
416 endif
417
418 ifeq ($(KBUILD_EXTMOD),)
419 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
420 config-targets := 1
421 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
422 mixed-targets := 1
423 endif
424 endif
425 endif
426
427 ifeq ($(mixed-targets),1)
428 # ===========================================================================
429 # We're called with mixed targets (*config and build targets).
430 # Handle them one by one.
431
432 %:: FORCE
433 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
434
435 else
436 ifeq ($(config-targets),1)
437 # ===========================================================================
438 # *config targets only - make sure prerequisites are updated, and descend
439 # in scripts/kconfig to make the *config target
440
441 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
442 # KBUILD_DEFCONFIG may point out an alternative default configuration
443 # used for 'make defconfig'
444 include $(srctree)/arch/$(ARCH)/Makefile
445 export KBUILD_DEFCONFIG
446
447 config: scripts_basic outputmakefile FORCE
448 $(Q)$(MAKE) $(build)=scripts/kconfig $@
449 %config: scripts_basic outputmakefile FORCE
450 $(Q)$(MAKE) $(build)=scripts/kconfig $@
451
452 else
453 # ===========================================================================
454 # Build targets only - this includes vmlinux, arch specific targets, clean
455 # targets and others. In general all targets except *config targets.
456
457 ifeq ($(KBUILD_EXTMOD),)
458 # Additional helpers built in scripts/
459 # Carefully list dependencies so we do not try to build scripts twice
460 # in parrallel
461 .PHONY: scripts
462 scripts: scripts_basic include/config/MARKER
463 $(Q)$(MAKE) $(build)=$(@)
464
465 scripts_basic: include/linux/autoconf.h
466
467 # Objects we will link into vmlinux / subdirs we need to visit
468 init-y := init/
469 drivers-y := drivers/ sound/
470 net-y := net/
471 libs-y := lib/
472 core-y := usr/
473 endif # KBUILD_EXTMOD
474
475 ifeq ($(dot-config),1)
476 # In this section, we need .config
477
478 # Read in dependencies to all Kconfig* files, make sure to run
479 # oldconfig if changes are detected.
480 -include .config.cmd
481
482 include .config
483
484 # If .config needs to be updated, it will be done via the dependency
485 # that autoconf has on .config.
486 # To avoid any implicit rule to kick in, define an empty command
487 .config: ;
488
489 # If .config is newer than include/linux/autoconf.h, someone tinkered
490 # with it and forgot to run make oldconfig
491 include/linux/autoconf.h: .config
492 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
493 else
494 # Dummy target needed, because used as prerequisite
495 include/linux/autoconf.h: ;
496 endif
497
498 # The all: target is the default when no target is given on the
499 # command line.
500 # This allow a user to issue only 'make' to build a kernel including modules
501 # Defaults vmlinux but it is usually overriden in the arch makefile
502 all: vmlinux
503
504 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
505 CFLAGS += -Os
506 else
507 CFLAGS += -O2
508 endif
509
510 #Add align options if CONFIG_CC_* is not equal to 0
511 add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
512 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
513 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
514 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
515 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
516
517 ifdef CONFIG_FRAME_POINTER
518 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
519 else
520 CFLAGS += -fomit-frame-pointer
521 endif
522
523 ifdef CONFIG_DEBUG_INFO
524 CFLAGS += -g
525 endif
526
527 include $(srctree)/arch/$(ARCH)/Makefile
528
529 # arch Makefile may override CC so keep this after arch Makefile is included
530 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
531 CHECKFLAGS += $(NOSTDINC_FLAGS)
532
533 # warn about C99 declaration after statement
534 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
535
536 # disable pointer signedness warnings in gcc 4.0
537 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
538
539 # Default kernel image to build when no specific target is given.
540 # KBUILD_IMAGE may be overruled on the commandline or
541 # set in the environment
542 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
543 # this default value
544 export KBUILD_IMAGE ?= vmlinux
545
546 #
547 # INSTALL_PATH specifies where to place the updated kernel and system map
548 # images. Default is /boot, but you can set it to other values
549 export INSTALL_PATH ?= /boot
550
551 # If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests
552 # and try to determine if the current source tree is a release tree, of any sort,
553 # or if is a pure development tree.
554 #
555 # A 'release tree' is any tree with a git TAG associated
556 # with it. The primary goal of this is to make it safe for a native
557 # git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to
558 # continue developing against the current Linus tree, without having the Linus
559 # tree overwrite the 2.6.9 tree when installed.
560 #
561 # Currently, only git is supported.
562 # Other SCMs can edit scripts/setlocalversion and add the appropriate
563 # checks as needed.
564
565
566 ifdef CONFIG_LOCALVERSION_AUTO
567 localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree))
568 LOCALVERSION := $(LOCALVERSION)$(localversion-auto)
569 endif
570
571 #
572 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
573 # relocations required by build roots. This is not defined in the
574 # makefile but the arguement can be passed to make if needed.
575 #
576
577 MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
578 export MODLIB
579
580
581 ifeq ($(KBUILD_EXTMOD),)
582 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/
583
584 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
585 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
586 $(net-y) $(net-m) $(libs-y) $(libs-m)))
587
588 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
589 $(init-n) $(init-) \
590 $(core-n) $(core-) $(drivers-n) $(drivers-) \
591 $(net-n) $(net-) $(libs-n) $(libs-))))
592
593 init-y := $(patsubst %/, %/built-in.o, $(init-y))
594 core-y := $(patsubst %/, %/built-in.o, $(core-y))
595 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
596 net-y := $(patsubst %/, %/built-in.o, $(net-y))
597 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
598 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
599 libs-y := $(libs-y1) $(libs-y2)
600
601 # Build vmlinux
602 # ---------------------------------------------------------------------------
603 # vmlinux is build from the objects selected by $(vmlinux-init) and
604 # $(vmlinux-main). Most are built-in.o files from top-level directories
605 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
606 # Ordering when linking is important, and $(vmlinux-init) must be first.
607 #
608 # vmlinux
609 # ^
610 # |
611 # +-< $(vmlinux-init)
612 # | +--< init/version.o + more
613 # |
614 # +--< $(vmlinux-main)
615 # | +--< driver/built-in.o mm/built-in.o + more
616 # |
617 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
618 #
619 # vmlinux version (uname -v) cannot be updated during normal
620 # descending-into-subdirs phase since we do not yet know if we need to
621 # update vmlinux.
622 # Therefore this step is delayed until just before final link of vmlinux -
623 # except in the kallsyms case where it is done just before adding the
624 # symbols to the kernel.
625 #
626 # System.map is generated to document addresses of all kernel symbols
627
628 vmlinux-init := $(head-y) $(init-y)
629 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
630 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
631 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
632
633 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
634 # May be overridden by arch/$(ARCH)/Makefile
635 quiet_cmd_vmlinux__ ?= LD $@
636 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
637 -T $(vmlinux-lds) $(vmlinux-init) \
638 --start-group $(vmlinux-main) --end-group \
639 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
640
641 # Generate new vmlinux version
642 quiet_cmd_vmlinux_version = GEN .version
643 cmd_vmlinux_version = set -e; \
644 . $(srctree)/scripts/mkversion > .tmp_version; \
645 mv -f .tmp_version .version; \
646 $(MAKE) $(build)=init
647
648 # Generate System.map
649 quiet_cmd_sysmap = SYSMAP
650 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
651
652 # Link of vmlinux
653 # If CONFIG_KALLSYMS is set .version is already updated
654 # Generate System.map and verify that the content is consistent
655
656 define rule_vmlinux__
657 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
658
659 $(call cmd,vmlinux__)
660 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
661
662 $(Q)$(if $($(quiet)cmd_sysmap), \
663 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
664 $(cmd_sysmap) $@ System.map; \
665 if [ $$? -ne 0 ]; then \
666 rm -f $@; \
667 /bin/false; \
668 fi;
669 $(verify_kallsyms)
670 endef
671
672
673 ifdef CONFIG_KALLSYMS
674 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
675 # It's a three stage process:
676 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
677 # empty
678 # Running kallsyms on that gives us .tmp_kallsyms1.o with
679 # the right size - vmlinux version (uname -v) is updated during this step
680 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
681 # but due to the added section, some addresses have shifted.
682 # From here, we generate a correct .tmp_kallsyms2.o
683 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
684 # o Verify that the System.map from vmlinux matches the map from
685 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
686 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
687 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
688 # temporary bypass to allow the kernel to be built while the
689 # maintainers work out what went wrong with kallsyms.
690
691 ifdef CONFIG_KALLSYMS_EXTRA_PASS
692 last_kallsyms := 3
693 else
694 last_kallsyms := 2
695 endif
696
697 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
698
699 define verify_kallsyms
700 $(Q)$(if $($(quiet)cmd_sysmap), \
701 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
702 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
703 $(Q)cmp -s System.map .tmp_System.map || \
704 (echo Inconsistent kallsyms data; \
705 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
706 rm .tmp_kallsyms* ; /bin/false )
707 endef
708
709 # Update vmlinux version before link
710 # Use + in front of this rule to silent warning about make -j1
711 # First command is ':' to allow us to use + in front of this rule
712 cmd_ksym_ld = $(cmd_vmlinux__)
713 define rule_ksym_ld
714 :
715 +$(call cmd,vmlinux_version)
716 $(call cmd,vmlinux__)
717 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
718 endef
719
720 # Generate .S file with all kernel symbols
721 quiet_cmd_kallsyms = KSYM $@
722 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
723 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
724
725 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
726 $(call if_changed_dep,as_o_S)
727
728 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
729 $(call cmd,kallsyms)
730
731 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
732 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
733 $(call if_changed_rule,ksym_ld)
734
735 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
736 $(call if_changed,vmlinux__)
737
738 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
739 $(call if_changed,vmlinux__)
740
741 # Needs to visit scripts/ before $(KALLSYMS) can be used.
742 $(KALLSYMS): scripts ;
743
744 # Generate some data for debugging strange kallsyms problems
745 debug_kallsyms: .tmp_map$(last_kallsyms)
746
747 .tmp_map%: .tmp_vmlinux% FORCE
748 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
749
750 .tmp_map3: .tmp_map2
751
752 .tmp_map2: .tmp_map1
753
754 endif # ifdef CONFIG_KALLSYMS
755
756 # vmlinux image - including updated kernel symbols
757 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
758 $(call if_changed_rule,vmlinux__)
759
760 # The actual objects are generated when descending,
761 # make sure no implicit rule kicks in
762 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
763
764 # Handle descending into subdirectories listed in $(vmlinux-dirs)
765 # Preset locale variables to speed up the build process. Limit locale
766 # tweaks to this spot to avoid wrong language settings when running
767 # make menuconfig etc.
768 # Error messages still appears in the original language
769
770 .PHONY: $(vmlinux-dirs)
771 $(vmlinux-dirs): prepare-all scripts
772 $(Q)$(MAKE) $(build)=$@
773
774 # Things we need to do before we recursively start building the kernel
775 # or the modules are listed in "prepare-all".
776 # A multi level approach is used. prepare1 is updated first, then prepare0.
777 # prepare-all is the collection point for the prepare targets.
778
779 .PHONY: prepare-all prepare prepare0 prepare1 prepare2 prepare3
780
781 # prepare3 is used to check if we are building in a separate output directory,
782 # and if so do:
783 # 1) Check that make has not been executed in the kernel src $(srctree)
784 # 2) Create the include2 directory, used for the second asm symlink
785
786 prepare3:
787 ifneq ($(KBUILD_SRC),)
788 @echo ' Using $(srctree) as source for kernel'
789 $(Q)if [ -f $(srctree)/.config ]; then \
790 echo " $(srctree) is not clean, please run 'make mrproper'";\
791 echo " in the '$(srctree)' directory.";\
792 /bin/false; \
793 fi;
794 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
795 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
796 endif
797
798 # prepare2 creates a makefile if using a separate output directory
799 prepare2: prepare3 outputmakefile
800
801 prepare1: prepare2 include/linux/version.h include/asm \
802 include/config/MARKER
803 ifneq ($(KBUILD_MODULES),)
804 $(Q)rm -rf $(MODVERDIR)
805 $(Q)mkdir -p $(MODVERDIR)
806 endif
807
808 prepare0: prepare prepare1 FORCE
809 $(Q)$(MAKE) $(build)=$(srctree)
810
811 # All the preparing..
812 prepare-all: prepare0
813
814 # Leave this as default for preprocessing vmlinux.lds.S, which is now
815 # done in arch/$(ARCH)/kernel/Makefile
816
817 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
818
819 # Single targets
820 # ---------------------------------------------------------------------------
821
822 %.s: %.c scripts FORCE
823 $(Q)$(MAKE) $(build)=$(@D) $@
824 %.i: %.c scripts FORCE
825 $(Q)$(MAKE) $(build)=$(@D) $@
826 %.o: %.c scripts FORCE
827 $(Q)$(MAKE) $(build)=$(@D) $@
828 %.ko: scripts FORCE
829 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
830 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
831 %/: scripts prepare FORCE
832 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
833 %.lst: %.c scripts FORCE
834 $(Q)$(MAKE) $(build)=$(@D) $@
835 %.s: %.S scripts FORCE
836 $(Q)$(MAKE) $(build)=$(@D) $@
837 %.o: %.S scripts FORCE
838 $(Q)$(MAKE) $(build)=$(@D) $@
839
840 # FIXME: The asm symlink changes when $(ARCH) changes. That's
841 # hard to detect, but I suppose "make mrproper" is a good idea
842 # before switching between archs anyway.
843
844 include/asm:
845 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
846 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
847 @ln -fsn asm-$(ARCH) $@
848
849 # Split autoconf.h into include/linux/config/*
850
851 include/config/MARKER: include/linux/autoconf.h
852 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
853 @scripts/basic/split-include include/linux/autoconf.h include/config
854 @touch $@
855
856 # Generate some files
857 # ---------------------------------------------------------------------------
858
859 # KERNELRELEASE can change from a few different places, meaning version.h
860 # needs to be updated, so this check is forced on all builds
861
862 uts_len := 64
863
864 define filechk_version.h
865 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
866 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
867 exit 1; \
868 fi; \
869 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
870 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
871 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
872 )
873 endef
874
875 include/linux/version.h: $(srctree)/Makefile FORCE
876 $(call filechk,version.h)
877
878 # ---------------------------------------------------------------------------
879
880 .PHONY: depend dep
881 depend dep:
882 @echo '*** Warning: make $@ is unnecessary now.'
883
884 # ---------------------------------------------------------------------------
885 # Modules
886
887 ifdef CONFIG_MODULES
888
889 # By default, build modules as well
890
891 all: modules
892
893 # Build modules
894
895 .PHONY: modules
896 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
897 @echo ' Building modules, stage 2.';
898 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
899
900
901 # Target to prepare building external modules
902 .PHONY: modules_prepare
903 modules_prepare: prepare-all scripts
904
905 # Target to install modules
906 .PHONY: modules_install
907 modules_install: _modinst_ _modinst_post
908
909 .PHONY: _modinst_
910 _modinst_:
911 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
912 echo "Warning: you may need to install module-init-tools"; \
913 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
914 sleep 1; \
915 fi
916 @rm -rf $(MODLIB)/kernel
917 @rm -f $(MODLIB)/source
918 @mkdir -p $(MODLIB)/kernel
919 @ln -s $(srctree) $(MODLIB)/source
920 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
921 rm -f $(MODLIB)/build ; \
922 ln -s $(objtree) $(MODLIB)/build ; \
923 fi
924 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
925
926 # If System.map exists, run depmod. This deliberately does not have a
927 # dependency on System.map since that would run the dependency tree on
928 # vmlinux. This depmod is only for convenience to give the initial
929 # boot a modules.dep even before / is mounted read-write. However the
930 # boot script depmod is the master version.
931 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
932 depmod_opts :=
933 else
934 depmod_opts := -b $(INSTALL_MOD_PATH) -r
935 endif
936 .PHONY: _modinst_post
937 _modinst_post: _modinst_
938 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
939
940 else # CONFIG_MODULES
941
942 # Modules not configured
943 # ---------------------------------------------------------------------------
944
945 modules modules_install: FORCE
946 @echo
947 @echo "The present kernel configuration has modules disabled."
948 @echo "Type 'make config' and enable loadable module support."
949 @echo "Then build a kernel with module support enabled."
950 @echo
951 @exit 1
952
953 endif # CONFIG_MODULES
954
955 ###
956 # Cleaning is done on three levels.
957 # make clean Delete most generated files
958 # Leave enough to build external modules
959 # make mrproper Delete the current configuration, and all generated files
960 # make distclean Remove editor backup files, patch leftover files and the like
961
962 # Directories & files removed with 'make clean'
963 CLEAN_DIRS += $(MODVERDIR)
964 CLEAN_FILES += vmlinux System.map \
965 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
966
967 # Directories & files removed with 'make mrproper'
968 MRPROPER_DIRS += include/config include2
969 MRPROPER_FILES += .config .config.old include/asm .version \
970 include/linux/autoconf.h include/linux/version.h \
971 Module.symvers tags TAGS cscope*
972
973 # clean - Delete most, but leave enough to build external modules
974 #
975 clean: rm-dirs := $(CLEAN_DIRS)
976 clean: rm-files := $(CLEAN_FILES)
977 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
978
979 .PHONY: $(clean-dirs) clean archclean
980 $(clean-dirs):
981 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
982
983 clean: archclean $(clean-dirs)
984 $(call cmd,rmdirs)
985 $(call cmd,rmfiles)
986 @find . $(RCS_FIND_IGNORE) \
987 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
988 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
989 -type f -print | xargs rm -f
990
991 # mrproper - Delete all generated files, including .config
992 #
993 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
994 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
995 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
996
997 .PHONY: $(mrproper-dirs) mrproper archmrproper
998 $(mrproper-dirs):
999 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1000
1001 mrproper: clean archmrproper $(mrproper-dirs)
1002 $(call cmd,rmdirs)
1003 $(call cmd,rmfiles)
1004
1005 # distclean
1006 #
1007 .PHONY: distclean
1008
1009 distclean: mrproper
1010 @find $(srctree) $(RCS_FIND_IGNORE) \
1011 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1012 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1013 -o -name '.*.rej' -o -size 0 \
1014 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1015 -type f -print | xargs rm -f
1016
1017
1018 # Packaging of the kernel to various formats
1019 # ---------------------------------------------------------------------------
1020 # rpm target kept for backward compatibility
1021 package-dir := $(srctree)/scripts/package
1022
1023 .PHONY: %-pkg rpm
1024
1025 %pkg: FORCE
1026 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1027 rpm: FORCE
1028 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1029
1030
1031 # Brief documentation of the typical targets used
1032 # ---------------------------------------------------------------------------
1033
1034 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1035 boards := $(notdir $(boards))
1036
1037 help:
1038 @echo 'Cleaning targets:'
1039 @echo ' clean - remove most generated files but keep the config'
1040 @echo ' mrproper - remove all generated files + config + various backup files'
1041 @echo ''
1042 @echo 'Configuration targets:'
1043 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1044 @echo ''
1045 @echo 'Other generic targets:'
1046 @echo ' all - Build all targets marked with [*]'
1047 @echo '* vmlinux - Build the bare kernel'
1048 @echo '* modules - Build all modules'
1049 @echo ' modules_install - Install all modules'
1050 @echo ' dir/ - Build all files in dir and below'
1051 @echo ' dir/file.[ois] - Build specified target only'
1052 @echo ' dir/file.ko - Build module including final link'
1053 @echo ' rpm - Build a kernel as an RPM package'
1054 @echo ' tags/TAGS - Generate tags file for editors'
1055 @echo ' cscope - Generate cscope index'
1056 @echo ''
1057 @echo 'Static analysers'
1058 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1059 @echo ' and init sections from non-init sections'
1060 @echo ' checkstack - Generate a list of stack hogs'
1061 @echo ' namespacecheck - Name space analysis on compiled kernel'
1062 @echo ''
1063 @echo 'Kernel packaging:'
1064 @$(MAKE) -f $(package-dir)/Makefile help
1065 @echo ''
1066 @echo 'Documentation targets:'
1067 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1068 @echo ''
1069 @echo 'Architecture specific targets ($(ARCH)):'
1070 @$(if $(archhelp),$(archhelp),\
1071 echo ' No architecture specific help defined for $(ARCH)')
1072 @echo ''
1073 @$(if $(boards), \
1074 $(foreach b, $(boards), \
1075 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1076 echo '')
1077
1078 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1079 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1080 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1081 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1082 @echo ''
1083 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1084 @echo 'For further info see the ./README file'
1085
1086
1087 # Documentation targets
1088 # ---------------------------------------------------------------------------
1089 %docs: scripts_basic FORCE
1090 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1091
1092 else # KBUILD_EXTMOD
1093
1094 ###
1095 # External module support.
1096 # When building external modules the kernel used as basis is considered
1097 # read-only, and no consistency checks are made and the make
1098 # system is not used on the basis kernel. If updates are required
1099 # in the basis kernel ordinary make commands (without M=...) must
1100 # be used.
1101 #
1102 # The following are the only valid targets when building external
1103 # modules.
1104 # make M=dir clean Delete all automatically generated files
1105 # make M=dir modules Make all modules in specified dir
1106 # make M=dir Same as 'make M=dir modules'
1107 # make M=dir modules_install
1108 # Install the modules build in the module directory
1109 # Assumes install directory is already created
1110
1111 # We are always building modules
1112 KBUILD_MODULES := 1
1113 .PHONY: crmodverdir
1114 crmodverdir:
1115 $(Q)mkdir -p $(MODVERDIR)
1116
1117 .PHONY: $(objtree)/Module.symvers
1118 $(objtree)/Module.symvers:
1119 @test -e $(objtree)/Module.symvers || ( \
1120 echo; \
1121 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1122 echo " is missing; modules will have no dependencies and modversions."; \
1123 echo )
1124
1125 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1126 .PHONY: $(module-dirs) modules
1127 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1128 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1129
1130 modules: $(module-dirs)
1131 @echo ' Building modules, stage 2.';
1132 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1133
1134 .PHONY: modules_install
1135 modules_install:
1136 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1137
1138 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1139
1140 .PHONY: $(clean-dirs) clean
1141 $(clean-dirs):
1142 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1143
1144 clean: rm-dirs := $(MODVERDIR)
1145 clean: $(clean-dirs)
1146 $(call cmd,rmdirs)
1147 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1148 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1149 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1150 -type f -print | xargs rm -f
1151
1152 help:
1153 @echo ' Building external modules.'
1154 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1155 @echo ''
1156 @echo ' modules - default target, build the module(s)'
1157 @echo ' modules_install - install the module'
1158 @echo ' clean - remove generated files in module directory only'
1159 @echo ''
1160 endif # KBUILD_EXTMOD
1161
1162 # Generate tags for editors
1163 # ---------------------------------------------------------------------------
1164
1165 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1166 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1167 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1168
1169 ifeq ($(src),$(obj))
1170 __srctree =
1171 else
1172 __srctree = $(srctree)/
1173 endif
1174
1175 ALLSOURCE_ARCHS := $(ARCH)
1176
1177 define all-sources
1178 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1179 \( -name include -o -name arch \) -prune -o \
1180 -name '*.[chS]' -print; \
1181 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1182 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1183 -name '*.[chS]' -print; \
1184 done ; \
1185 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1186 -name '*.[chS]' -print; \
1187 find $(__srctree)include $(RCS_FIND_IGNORE) \
1188 \( -name config -o -name 'asm-*' \) -prune \
1189 -o -name '*.[chS]' -print; \
1190 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1191 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1192 -name '*.[chS]' -print; \
1193 done ; \
1194 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1195 -name '*.[chS]' -print )
1196 endef
1197
1198 quiet_cmd_cscope-file = FILELST cscope.files
1199 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1200
1201 quiet_cmd_cscope = MAKE cscope.out
1202 cmd_cscope = cscope -b
1203
1204 cscope: FORCE
1205 $(call cmd,cscope-file)
1206 $(call cmd,cscope)
1207
1208 quiet_cmd_TAGS = MAKE $@
1209 define cmd_TAGS
1210 rm -f $@; \
1211 ETAGSF=`etags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1212 $(all-sources) | xargs etags $$ETAGSF -a
1213 endef
1214
1215 TAGS: FORCE
1216 $(call cmd,TAGS)
1217
1218
1219 quiet_cmd_tags = MAKE $@
1220 define cmd_tags
1221 rm -f $@; \
1222 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1223 $(all-sources) | xargs ctags $$CTAGSF -a
1224 endef
1225
1226 tags: FORCE
1227 $(call cmd,tags)
1228
1229
1230 # Scripts to check various things for consistency
1231 # ---------------------------------------------------------------------------
1232
1233 configcheck:
1234 find * $(RCS_FIND_IGNORE) \
1235 -name '*.[hcS]' -type f -print | sort \
1236 | xargs $(PERL) -w scripts/checkconfig.pl
1237
1238 includecheck:
1239 find * $(RCS_FIND_IGNORE) \
1240 -name '*.[hcS]' -type f -print | sort \
1241 | xargs $(PERL) -w scripts/checkincludes.pl
1242
1243 versioncheck:
1244 find * $(RCS_FIND_IGNORE) \
1245 -name '*.[hcS]' -type f -print | sort \
1246 | xargs $(PERL) -w scripts/checkversion.pl
1247
1248 buildcheck:
1249 $(PERL) $(srctree)/scripts/reference_discarded.pl
1250 $(PERL) $(srctree)/scripts/reference_init.pl
1251
1252 namespacecheck:
1253 $(PERL) $(srctree)/scripts/namespace.pl
1254
1255 endif #ifeq ($(config-targets),1)
1256 endif #ifeq ($(mixed-targets),1)
1257
1258 .PHONY: checkstack
1259 checkstack:
1260 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1261 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1262
1263 kernelrelease:
1264 @echo $(KERNELRELEASE)
1265
1266 # FIXME Should go into a make.lib or something
1267 # ===========================================================================
1268
1269 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1270 cmd_rmdirs = rm -rf $(rm-dirs)
1271
1272 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1273 cmd_rmfiles = rm -f $(rm-files)
1274
1275
1276 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1277 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1278 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1279
1280 quiet_cmd_as_o_S = AS $@
1281 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1282
1283 # read all saved command lines
1284
1285 targets := $(wildcard $(sort $(targets)))
1286 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1287
1288 ifneq ($(cmd_files),)
1289 $(cmd_files): ; # Do not try to update included dependency files
1290 include $(cmd_files)
1291 endif
1292
1293 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1294 # Usage:
1295 # $(Q)$(MAKE) $(clean)=dir
1296 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1297
1298 endif # skip-makefile
1299
1300 FORCE: