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Contents of /trunk/mkinitrd-magellan/busybox/Makefile

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Revision 1179 - (show annotations) (download)
Wed Dec 15 21:33:41 2010 UTC (13 years, 10 months ago) by niro
File size: 43327 byte(s)
-updated to busybox-1.17.4
1 VERSION = 1
2 PATCHLEVEL = 17
3 SUBLEVEL = 4
4 EXTRAVERSION =
5 NAME = Unnamed
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 busybox), 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 := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
141
142 export srctree objtree VPATH TOPDIR
143
144
145 # Cross compiling and selecting different set of gcc/bin-utils
146 # ---------------------------------------------------------------------------
147 #
148 # When performing cross compilation for other architectures ARCH shall be set
149 # to the target architecture. (See arch/* for the possibilities).
150 # ARCH can be set during invocation of make:
151 # make ARCH=ia64
152 # Another way is to have ARCH set in the environment.
153 # The default ARCH is the host where make is executed.
154
155 # CROSS_COMPILE specify the prefix used for all executables used
156 # during compilation. Only gcc and related bin-utils executables
157 # are prefixed with $(CROSS_COMPILE).
158 # CROSS_COMPILE can be set on the command line
159 # make CROSS_COMPILE=ia64-linux-
160 # Alternatively CROSS_COMPILE can be set in the environment.
161 # Default value for CROSS_COMPILE is not to prefix executables
162 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
163
164 CROSS_COMPILE ?=
165 # bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config,
166 # and it has not been included yet... thus using an awkward syntax.
167 ifeq ($(CROSS_COMPILE),)
168 CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null)
169 CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE))
170 CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE))
171 #")
172 endif
173
174 # SUBARCH tells the usermode build what the underlying arch is. That is set
175 # first, and if a usermode build is happening, the "ARCH=um" on the command
176 # line overrides the setting of ARCH below. If a native build is happening,
177 # then ARCH is assigned, getting whatever value it gets normally, and
178 # SUBARCH is subsequently ignored.
179
180 ifneq ($(CROSS_COMPILE),)
181 SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1)
182 else
183 SUBARCH := $(shell uname -m)
184 endif
185 SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
186 -e s/arm.*/arm/ -e s/sa110/arm/ \
187 -e s/s390x/s390/ -e s/parisc64/parisc/ \
188 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
189
190 ARCH ?= $(SUBARCH)
191
192 # Architecture as present in compile.h
193 UTS_MACHINE := $(ARCH)
194
195 # SHELL used by kbuild
196 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
197 else if [ -x /bin/bash ]; then echo /bin/bash; \
198 else echo sh; fi ; fi)
199
200 # Decide whether to build built-in, modular, or both.
201 # Normally, just do built-in.
202
203 KBUILD_MODULES :=
204 KBUILD_BUILTIN := 1
205
206 # If we have only "make modules", don't compile built-in objects.
207 # When we're building modules with modversions, we need to consider
208 # the built-in objects during the descend as well, in order to
209 # make sure the checksums are uptodate before we record them.
210
211 ifeq ($(MAKECMDGOALS),modules)
212 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
213 endif
214
215 # If we have "make <whatever> modules", compile modules
216 # in addition to whatever we do anyway.
217 # Just "make" or "make all" shall build modules as well
218
219 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
220 KBUILD_MODULES := 1
221 endif
222
223 ifeq ($(MAKECMDGOALS),)
224 KBUILD_MODULES := 1
225 endif
226
227 export KBUILD_MODULES KBUILD_BUILTIN
228 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
229
230 # Beautify output
231 # ---------------------------------------------------------------------------
232 #
233 # Normally, we echo the whole command before executing it. By making
234 # that echo $($(quiet)$(cmd)), we now have the possibility to set
235 # $(quiet) to choose other forms of output instead, e.g.
236 #
237 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
238 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
239 #
240 # If $(quiet) is empty, the whole command will be printed.
241 # If it is set to "quiet_", only the short version will be printed.
242 # If it is set to "silent_", nothing wil be printed at all, since
243 # the variable $(silent_cmd_cc_o_c) doesn't exist.
244 #
245 # A simple variant is to prefix commands with $(Q) - that's useful
246 # for commands that shall be hidden in non-verbose mode.
247 #
248 # $(Q)ln $@ :<
249 #
250 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
251 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
252
253 ifeq ($(KBUILD_VERBOSE),1)
254 quiet =
255 Q =
256 else
257 quiet=quiet_
258 Q = @
259 endif
260
261 # If the user is running make -s (silent mode), suppress echoing of
262 # commands
263
264 ifneq ($(findstring s,$(MAKEFLAGS)),)
265 quiet=silent_
266 endif
267
268 export quiet Q KBUILD_VERBOSE
269
270
271 # Look for make include files relative to root of kernel src
272 MAKEFLAGS += --include-dir=$(srctree)
273
274 HOSTCC = gcc
275 HOSTCXX = g++
276 HOSTCFLAGS :=
277 HOSTCXXFLAGS :=
278 # We need some generic definitions
279 include $(srctree)/scripts/Kbuild.include
280
281 HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,)
282 HOSTCXXFLAGS += -O2
283
284 # For maximum performance (+ possibly random breakage, uncomment
285 # the following)
286
287 MAKEFLAGS += -rR
288
289 # Make variables (CC, etc...)
290
291 AS = $(CROSS_COMPILE)as
292 CC = $(CROSS_COMPILE)gcc
293 LD = $(CC) -nostdlib
294 CPP = $(CC) -E
295 AR = $(CROSS_COMPILE)ar
296 NM = $(CROSS_COMPILE)nm
297 STRIP = $(CROSS_COMPILE)strip
298 OBJCOPY = $(CROSS_COMPILE)objcopy
299 OBJDUMP = $(CROSS_COMPILE)objdump
300 AWK = awk
301 GENKSYMS = scripts/genksyms/genksyms
302 DEPMOD = /sbin/depmod
303 KALLSYMS = scripts/kallsyms
304 PERL = perl
305 CHECK = sparse
306
307 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
308 MODFLAGS = -DMODULE
309 CFLAGS_MODULE = $(MODFLAGS)
310 AFLAGS_MODULE = $(MODFLAGS)
311 LDFLAGS_MODULE = -r
312 CFLAGS_KERNEL =
313 AFLAGS_KERNEL =
314
315
316 # Use LINUXINCLUDE when you must reference the include/ directory.
317 # Needed to be compatible with the O= option
318 CFLAGS := $(CFLAGS)
319 # Added only to final link stage of busybox binary
320 CFLAGS_busybox := $(CFLAGS_busybox)
321 CPPFLAGS := $(CPPFLAGS)
322 AFLAGS := $(AFLAGS)
323 LDFLAGS := $(LDFLAGS)
324 LDLIBS :=
325
326 # Read KERNELRELEASE from .kernelrelease (if it exists)
327 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
328 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
329
330 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
331 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
332 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
333 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
334
335 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
336 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
337 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
338 export FLTFLAGS
339
340 # When compiling out-of-tree modules, put MODVERDIR in the module
341 # tree rather than in the kernel tree. The kernel tree might
342 # even be read-only.
343 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
344
345 # Files to ignore in find ... statements
346
347 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
348 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
349
350 # ===========================================================================
351 # Rules shared between *config targets and build targets
352
353 # Basic helpers built in scripts/
354 PHONY += scripts_basic
355 scripts_basic:
356 $(Q)$(MAKE) $(build)=scripts/basic
357
358 # To avoid any implicit rule to kick in, define an empty command.
359 scripts/basic/%: scripts_basic ;
360
361 # This target generates Kbuild's and Config.in's from *.c files
362 PHONY += gen_build_files
363 gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c)
364 $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree)
365
366 # bbox: we have helpers in applets/
367 # we depend on scripts_basic, since scripts/basic/fixdep
368 # must be built before any other host prog
369 PHONY += applets_dir
370 applets_dir: scripts_basic gen_build_files
371 $(Q)$(MAKE) $(build)=applets
372
373 applets/%: applets_dir ;
374
375 PHONY += outputmakefile
376 # outputmakefile generates a Makefile in the output directory, if using a
377 # separate output directory. This allows convenient use of make in the
378 # output directory.
379 outputmakefile:
380 ifneq ($(KBUILD_SRC),)
381 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
382 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
383 endif
384
385 # To make sure we do not include .config for any of the *config targets
386 # catch them early, and hand them over to scripts/kconfig/Makefile
387 # It is allowed to specify more targets when calling make, including
388 # mixing *config targets and build targets.
389 # For example 'make oldconfig all'.
390 # Detect when mixed targets is specified, and make a second invocation
391 # of make so .config is not included in this case either (for *config).
392
393 no-dot-config-targets := clean mrproper distclean \
394 cscope TAGS tags help %docs
395 #bbox# check% is removed from above
396
397 config-targets := 0
398 mixed-targets := 0
399 dot-config := 1
400
401 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
402 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
403 dot-config := 0
404 endif
405 endif
406
407 ifeq ($(KBUILD_EXTMOD),)
408 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
409 config-targets := 1
410 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
411 mixed-targets := 1
412 endif
413 endif
414 endif
415
416 ifeq ($(mixed-targets),1)
417 # ===========================================================================
418 # We're called with mixed targets (*config and build targets).
419 # Handle them one by one.
420
421 %:: FORCE
422 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
423
424 else
425 ifeq ($(config-targets),1)
426 # ===========================================================================
427 # *config targets only - make sure prerequisites are updated, and descend
428 # in scripts/kconfig to make the *config target
429
430 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
431 # KBUILD_DEFCONFIG may point out an alternative default configuration
432 # used for 'make defconfig'
433 -include $(srctree)/arch/$(ARCH)/Makefile
434 export KBUILD_DEFCONFIG
435
436 config: scripts_basic outputmakefile gen_build_files FORCE
437 $(Q)mkdir -p include
438 $(Q)$(MAKE) $(build)=scripts/kconfig $@
439 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
440
441 %config: scripts_basic outputmakefile gen_build_files FORCE
442 $(Q)mkdir -p include
443 $(Q)$(MAKE) $(build)=scripts/kconfig $@
444 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
445
446 else
447 # ===========================================================================
448 # Build targets only - this includes busybox, arch specific targets, clean
449 # targets and others. In general all targets except *config targets.
450
451 ifeq ($(KBUILD_EXTMOD),)
452 # Additional helpers built in scripts/
453 # Carefully list dependencies so we do not try to build scripts twice
454 # in parallel
455 PHONY += scripts
456 scripts: gen_build_files scripts_basic include/config/MARKER
457 $(Q)$(MAKE) $(build)=$(@)
458
459 scripts_basic: include/autoconf.h
460
461 # Objects we will link into busybox / subdirs we need to visit
462 core-y := \
463 applets/ \
464
465 libs-y := \
466 archival/ \
467 archival/libunarchive/ \
468 console-tools/ \
469 coreutils/ \
470 coreutils/libcoreutils/ \
471 debianutils/ \
472 e2fsprogs/ \
473 editors/ \
474 findutils/ \
475 init/ \
476 libbb/ \
477 libpwdgrp/ \
478 loginutils/ \
479 mailutils/ \
480 miscutils/ \
481 modutils/ \
482 networking/ \
483 networking/libiproute/ \
484 networking/udhcp/ \
485 printutils/ \
486 procps/ \
487 runit/ \
488 selinux/ \
489 shell/ \
490 sysklogd/ \
491 util-linux/ \
492 util-linux/volume_id/ \
493
494 endif # KBUILD_EXTMOD
495
496 ifeq ($(dot-config),1)
497 # In this section, we need .config
498
499 # Read in dependencies to all Kconfig* files, make sure to run
500 # oldconfig if changes are detected.
501 -include .kconfig.d
502
503 -include .config
504
505 # If .config needs to be updated, it will be done via the dependency
506 # that autoconf has on .config.
507 # To avoid any implicit rule to kick in, define an empty command
508 .config .kconfig.d: ;
509
510 # Now we can define CFLAGS etc according to .config
511 include $(srctree)/Makefile.flags
512
513 # If .config is newer than include/autoconf.h, someone tinkered
514 # with it and forgot to run make oldconfig.
515 # If kconfig.d is missing then we are probarly in a cleaned tree so
516 # we execute the config step to be sure to catch updated Kconfig files
517 include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files
518 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
519
520 include/usage.h: gen_build_files
521
522 else
523 # Dummy target needed, because used as prerequisite
524 include/autoconf.h: ;
525 endif
526
527 # The all: target is the default when no target is given on the
528 # command line.
529 # This allow a user to issue only 'make' to build a kernel including modules
530 # Defaults busybox but it is usually overridden in the arch makefile
531 all: busybox doc
532
533 -include $(srctree)/arch/$(ARCH)/Makefile
534
535 # arch Makefile may override CC so keep this after arch Makefile is included
536 #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
537 CHECKFLAGS += $(NOSTDINC_FLAGS)
538
539 # Default kernel image to build when no specific target is given.
540 # KBUILD_IMAGE may be overruled on the commandline or
541 # set in the environment
542 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
543 # this default value
544 export KBUILD_IMAGE ?= busybox
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 #
552 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
553 # relocations required by build roots. This is not defined in the
554 # makefile but the arguement can be passed to make if needed.
555 #
556
557 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
558 export MODLIB
559
560
561 ifeq ($(KBUILD_EXTMOD),)
562 busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
563
564 busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
565 $(core-n) $(core-) $(libs-n) $(libs-) \
566 )))
567
568 core-y := $(patsubst %/, %/built-in.o, $(core-y))
569 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
570 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
571 libs-y := $(libs-y1) $(libs-y2)
572
573 # Build busybox
574 # ---------------------------------------------------------------------------
575 # busybox is build from the objects selected by $(busybox-init) and
576 # $(busybox-main). Most are built-in.o files from top-level directories
577 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
578 # Ordering when linking is important, and $(busybox-init) must be first.
579 #
580 # busybox
581 # ^
582 # |
583 # +-< $(busybox-init)
584 # | +--< init/version.o + more
585 # |
586 # +--< $(busybox-main)
587 # | +--< driver/built-in.o mm/built-in.o + more
588 # |
589 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
590 #
591 # busybox version (uname -v) cannot be updated during normal
592 # descending-into-subdirs phase since we do not yet know if we need to
593 # update busybox.
594 # Therefore this step is delayed until just before final link of busybox -
595 # except in the kallsyms case where it is done just before adding the
596 # symbols to the kernel.
597 #
598 # System.map is generated to document addresses of all kernel symbols
599
600 busybox-all := $(core-y) $(libs-y)
601
602 # Rule to link busybox - also used during CONFIG_KALLSYMS
603 # May be overridden by arch/$(ARCH)/Makefile
604 quiet_cmd_busybox__ ?= LINK $@
605 cmd_busybox__ ?= $(srctree)/scripts/trylink \
606 "$@" \
607 "$(CC)" \
608 "$(CFLAGS) $(CFLAGS_busybox)" \
609 "$(LDFLAGS) $(EXTRA_LDFLAGS)" \
610 "$(core-y)" \
611 "$(libs-y)" \
612 "$(LDLIBS)"
613
614 # Generate System.map
615 quiet_cmd_sysmap = SYSMAP
616 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
617
618 # Link of busybox
619 # If CONFIG_KALLSYMS is set .version is already updated
620 # Generate System.map and verify that the content is consistent
621 # Use + in front of the busybox_version rule to silent warning with make -j2
622 # First command is ':' to allow us to use + in front of the rule
623 define rule_busybox__
624 :
625 $(call cmd,busybox__)
626 $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
627 endef
628
629
630 ifdef CONFIG_KALLSYMS
631 # Generate section listing all symbols and add it into busybox $(kallsyms.o)
632 # It's a three stage process:
633 # o .tmp_busybox1 has all symbols and sections, but __kallsyms is
634 # empty
635 # Running kallsyms on that gives us .tmp_kallsyms1.o with
636 # the right size - busybox version (uname -v) is updated during this step
637 # o .tmp_busybox2 now has a __kallsyms section of the right size,
638 # but due to the added section, some addresses have shifted.
639 # From here, we generate a correct .tmp_kallsyms2.o
640 # o The correct .tmp_kallsyms2.o is linked into the final busybox.
641 # o Verify that the System.map from busybox matches the map from
642 # .tmp_busybox2, just in case we did not generate kallsyms correctly.
643 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
644 # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a
645 # temporary bypass to allow the kernel to be built while the
646 # maintainers work out what went wrong with kallsyms.
647
648 ifdef CONFIG_KALLSYMS_EXTRA_PASS
649 last_kallsyms := 3
650 else
651 last_kallsyms := 2
652 endif
653
654 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
655
656 define verify_kallsyms
657 $(Q)$(if $($(quiet)cmd_sysmap), \
658 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
659 $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
660 $(Q)cmp -s System.map .tmp_System.map || \
661 (echo Inconsistent kallsyms data; \
662 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
663 rm .tmp_kallsyms* ; /bin/false )
664 endef
665
666 # Update busybox version before link
667 # Use + in front of this rule to silent warning about make -j1
668 # First command is ':' to allow us to use + in front of this rule
669 cmd_ksym_ld = $(cmd_busybox__)
670 define rule_ksym_ld
671 :
672 +$(call cmd,busybox_version)
673 $(call cmd,busybox__)
674 $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
675 endef
676
677 # Generate .S file with all kernel symbols
678 quiet_cmd_kallsyms = KSYM $@
679 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
680 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
681
682 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
683 $(call if_changed_dep,as_o_S)
684
685 .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
686 $(call cmd,kallsyms)
687
688 # .tmp_busybox1 must be complete except kallsyms, so update busybox version
689 .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
690 $(call if_changed_rule,ksym_ld)
691
692 .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
693 $(call if_changed,busybox__)
694
695 .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
696 $(call if_changed,busybox__)
697
698 # Needs to visit scripts/ before $(KALLSYMS) can be used.
699 $(KALLSYMS): scripts ;
700
701 # Generate some data for debugging strange kallsyms problems
702 debug_kallsyms: .tmp_map$(last_kallsyms)
703
704 .tmp_map%: .tmp_busybox% FORCE
705 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
706
707 .tmp_map3: .tmp_map2
708
709 .tmp_map2: .tmp_map1
710
711 endif # ifdef CONFIG_KALLSYMS
712
713 # busybox image - including updated kernel symbols
714 busybox_unstripped: $(busybox-all) FORCE
715 $(call if_changed_rule,busybox__)
716 $(Q)rm -f .old_version
717
718 busybox: busybox_unstripped
719 ifeq ($(SKIP_STRIP),y)
720 $(Q)cp $< $@
721 else
722 $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
723 busybox_unstripped -o $@
724 # strip is confused by PIE executable and does not set exec bits
725 $(Q)chmod a+x $@
726 endif
727
728 # The actual objects are generated when descending,
729 # make sure no implicit rule kicks in
730 $(sort $(busybox-all)): $(busybox-dirs) ;
731
732 # Handle descending into subdirectories listed in $(busybox-dirs)
733 # Preset locale variables to speed up the build process. Limit locale
734 # tweaks to this spot to avoid wrong language settings when running
735 # make menuconfig etc.
736 # Error messages still appears in the original language
737
738 PHONY += $(busybox-dirs)
739 $(busybox-dirs): prepare scripts
740 $(Q)$(MAKE) $(build)=$@
741
742 # Build the kernel release string
743 # The KERNELRELEASE is stored in a file named .kernelrelease
744 # to be used when executing for example make install or make modules_install
745 #
746 # Take the contents of any files called localversion* and the config
747 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
748 # LOCALVERSION from the command line override all of this
749
750 nullstring :=
751 space := $(nullstring) # end of line
752
753 ___localver = $(objtree)/localversion* $(srctree)/localversion*
754 __localver = $(sort $(wildcard $(___localver)))
755 # skip backup files (containing '~')
756 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
757
758 localver = $(subst $(space),, \
759 $(shell cat /dev/null $(_localver)) \
760 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
761
762 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
763 # and if the SCM is know a tag from the SCM is appended.
764 # The appended tag is determinded by the SCM used.
765 #
766 # Currently, only git is supported.
767 # Other SCMs can edit scripts/setlocalversion and add the appropriate
768 # checks as needed.
769 ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO
770 _localver-auto = $(shell $(CONFIG_SHELL) \
771 $(srctree)/scripts/setlocalversion $(srctree))
772 localver-auto = $(LOCALVERSION)$(_localver-auto)
773 endif
774
775 localver-full = $(localver)$(localver-auto)
776
777 # Store (new) KERNELRELASE string in .kernelrelease
778 kernelrelease = $(KERNELVERSION)$(localver-full)
779 .kernelrelease: FORCE
780 $(Q)rm -f $@
781 $(Q)echo $(kernelrelease) > $@
782
783
784 # Things we need to do before we recursively start building the kernel
785 # or the modules are listed in "prepare".
786 # A multi level approach is used. prepareN is processed before prepareN-1.
787 # archprepare is used in arch Makefiles and when processed asm symlink,
788 # version.h and scripts_basic is processed / created.
789
790 # Listed in dependency order
791 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
792
793 # prepare-all is deprecated, use prepare as valid replacement
794 PHONY += prepare-all
795
796 # prepare3 is used to check if we are building in a separate output directory,
797 # and if so do:
798 # 1) Check that make has not been executed in the kernel src $(srctree)
799 # 2) Create the include2 directory, used for the second asm symlink
800 prepare3: .kernelrelease
801 ifneq ($(KBUILD_SRC),)
802 @echo ' Using $(srctree) as source for busybox'
803 $(Q)if [ -f $(srctree)/.config ]; then \
804 echo " $(srctree) is not clean, please run 'make mrproper'";\
805 echo " in the '$(srctree)' directory.";\
806 /bin/false; \
807 fi;
808 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
809 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
810 endif
811
812 # prepare2 creates a makefile if using a separate output directory
813 prepare2: prepare3 outputmakefile
814
815 prepare1: prepare2 include/config/MARKER
816 ifneq ($(KBUILD_MODULES),)
817 $(Q)mkdir -p $(MODVERDIR)
818 $(Q)rm -f $(MODVERDIR)/*
819 endif
820
821 archprepare: prepare1 scripts_basic applets_dir
822
823 prepare0: archprepare FORCE
824 $(Q)$(MAKE) $(build)=.
825
826 # All the preparing..
827 prepare prepare-all: prepare0
828
829 # Leave this as default for preprocessing busybox.lds.S, which is now
830 # done in arch/$(ARCH)/kernel/Makefile
831
832 export CPPFLAGS_busybox.lds += -P -C -U$(ARCH)
833
834 # FIXME: The asm symlink changes when $(ARCH) changes. That's
835 # hard to detect, but I suppose "make mrproper" is a good idea
836 # before switching between archs anyway.
837
838 #bbox# include/asm:
839 #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
840 #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi;
841 #bbox# @ln -fsn asm-$(ARCH) $@
842
843 # Split autoconf.h into include/linux/config/*
844 quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h
845 cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs > include/bbconfigopts.h
846 quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/*
847 cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config
848 #bbox# piggybacked generation of few .h files
849 include/config/MARKER: scripts/basic/split-include include/autoconf.h
850 $(call cmd,split_autoconf)
851 $(call cmd,gen_bbconfigopts)
852 @touch $@
853
854 # Generate some files
855 # ---------------------------------------------------------------------------
856
857 # KERNELRELEASE can change from a few different places, meaning version.h
858 # needs to be updated, so this check is forced on all builds
859
860 uts_len := 64
861
862 define filechk_version.h
863 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
864 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
865 exit 1; \
866 fi; \
867 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
868 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
869 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
870 )
871 endef
872
873 # ---------------------------------------------------------------------------
874
875 PHONY += depend dep
876 depend dep:
877 @echo '*** Warning: make $@ is unnecessary now.'
878
879 # ---------------------------------------------------------------------------
880 # Modules
881
882 ifdef _BB_DISABLED_CONFIG_MODULES
883
884 # By default, build modules as well
885
886 all: modules
887
888 # Build modules
889
890 PHONY += modules
891 modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
892 @echo ' Building modules, stage 2.';
893 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
894
895
896 # Target to prepare building external modules
897 PHONY += modules_prepare
898 modules_prepare: prepare scripts
899
900 # Target to install modules
901 PHONY += modules_install
902 modules_install: _modinst_ _modinst_post
903
904 PHONY += _modinst_
905 _modinst_:
906 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
907 echo "Warning: you may need to install module-init-tools"; \
908 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
909 sleep 1; \
910 fi
911 @rm -rf $(MODLIB)/kernel
912 @rm -f $(MODLIB)/source
913 @mkdir -p $(MODLIB)/kernel
914 @ln -s $(srctree) $(MODLIB)/source
915 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
916 rm -f $(MODLIB)/build ; \
917 ln -s $(objtree) $(MODLIB)/build ; \
918 fi
919 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
920
921 # If System.map exists, run depmod. This deliberately does not have a
922 # dependency on System.map since that would run the dependency tree on
923 # busybox. This depmod is only for convenience to give the initial
924 # boot a modules.dep even before / is mounted read-write. However the
925 # boot script depmod is the master version.
926 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
927 depmod_opts :=
928 else
929 depmod_opts := -b $(INSTALL_MOD_PATH) -r
930 endif
931 PHONY += _modinst_post
932 _modinst_post: _modinst_
933 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
934
935 else # CONFIG_MODULES
936
937 # Modules not configured
938 # ---------------------------------------------------------------------------
939
940 modules modules_install: FORCE
941 @echo
942 @echo "The present busybox configuration has modules disabled."
943 @echo "Type 'make config' and enable loadable module support."
944 @echo "Then build a kernel with module support enabled."
945 @echo
946 @exit 1
947
948 endif # CONFIG_MODULES
949
950 ###
951 # Cleaning is done on three levels.
952 # make clean Delete most generated files
953 # Leave enough to build external modules
954 # make mrproper Delete the current configuration, and all generated files
955 # make distclean Remove editor backup files, patch leftover files and the like
956
957 # Directories & files removed with 'make clean'
958 CLEAN_DIRS += $(MODVERDIR) _install 0_lib
959 CLEAN_FILES += busybox busybox_unstripped* busybox.links \
960 System.map .kernelrelease \
961 .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
962
963 # Directories & files removed with 'make mrproper'
964 MRPROPER_DIRS += include/config include2
965 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
966 include/autoconf.h \
967 include/bbconfigopts.h \
968 include/usage_compressed.h \
969 include/applet_tables.h \
970 applets/usage \
971 .kernelrelease Module.symvers tags TAGS cscope* \
972 busybox_old
973
974 # clean - Delete most, but leave enough to build external modules
975 #
976 clean: rm-dirs := $(CLEAN_DIRS)
977 clean: rm-files := $(CLEAN_FILES)
978 clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
979
980 PHONY += $(clean-dirs) clean archclean
981 $(clean-dirs):
982 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
983
984 clean: archclean $(clean-dirs)
985 $(call cmd,rmdirs)
986 $(call cmd,rmfiles)
987 @find . $(RCS_FIND_IGNORE) \
988 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
989 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
990 -type f -print | xargs rm -f
991
992 PHONY += doc-clean
993 doc-clean: rm-files := docs/busybox.pod \
994 docs/BusyBox.html docs/BusyBox.1 docs/BusyBox.txt
995 doc-clean:
996 $(call cmd,rmfiles)
997
998 # mrproper - Delete all generated files, including .config
999 #
1000 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1001 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1002 mrproper-dirs := $(addprefix _mrproper_,scripts)
1003
1004 PHONY += $(mrproper-dirs) mrproper archmrproper
1005 $(mrproper-dirs):
1006 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1007
1008 mrproper: clean archmrproper $(mrproper-dirs)
1009 $(call cmd,rmdirs)
1010 $(call cmd,rmfiles)
1011 @find -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f
1012 @find -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f
1013
1014 # distclean
1015 #
1016 PHONY += distclean
1017
1018 distclean: mrproper
1019 @find $(srctree) $(RCS_FIND_IGNORE) \
1020 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1021 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1022 -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \
1023 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1024 -type f -print | xargs rm -f
1025
1026
1027 # Packaging of the kernel to various formats
1028 # ---------------------------------------------------------------------------
1029 # rpm target kept for backward compatibility
1030 package-dir := $(srctree)/scripts/package
1031
1032 %pkg: FORCE
1033 $(Q)$(MAKE) $(build)=$(package-dir) $@
1034 rpm: FORCE
1035 $(Q)$(MAKE) $(build)=$(package-dir) $@
1036
1037
1038 # Brief documentation of the typical targets used
1039 # ---------------------------------------------------------------------------
1040
1041 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1042 boards := $(notdir $(boards))
1043
1044 -include $(srctree)/Makefile.help
1045
1046 # Documentation targets
1047 # ---------------------------------------------------------------------------
1048 %docs: scripts_basic FORCE
1049 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1050
1051 else # KBUILD_EXTMOD
1052
1053 ###
1054 # External module support.
1055 # When building external modules the kernel used as basis is considered
1056 # read-only, and no consistency checks are made and the make
1057 # system is not used on the basis kernel. If updates are required
1058 # in the basis kernel ordinary make commands (without M=...) must
1059 # be used.
1060 #
1061 # The following are the only valid targets when building external
1062 # modules.
1063 # make M=dir clean Delete all automatically generated files
1064 # make M=dir modules Make all modules in specified dir
1065 # make M=dir Same as 'make M=dir modules'
1066 # make M=dir modules_install
1067 # Install the modules build in the module directory
1068 # Assumes install directory is already created
1069
1070 # We are always building modules
1071 KBUILD_MODULES := 1
1072 PHONY += crmodverdir
1073 crmodverdir:
1074 $(Q)mkdir -p $(MODVERDIR)
1075 $(Q)rm -f $(MODVERDIR)/*
1076
1077 PHONY += $(objtree)/Module.symvers
1078 $(objtree)/Module.symvers:
1079 @test -e $(objtree)/Module.symvers || ( \
1080 echo; \
1081 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1082 echo " is missing; modules will have no dependencies and modversions."; \
1083 echo )
1084
1085 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1086 PHONY += $(module-dirs) modules
1087 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1088 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1089
1090 modules: $(module-dirs)
1091 @echo ' Building modules, stage 2.';
1092 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1093
1094 PHONY += modules_install
1095 modules_install: _emodinst_ _emodinst_post
1096
1097 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1098 PHONY += _emodinst_
1099 _emodinst_:
1100 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1101 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1102
1103 # Run depmod only is we have System.map and depmod is executable
1104 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1105 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1106 $(DEPMOD) -ae -F System.map \
1107 $(if $(strip $(INSTALL_MOD_PATH)), \
1108 -b $(INSTALL_MOD_PATH) -r) \
1109 $(KERNELRELEASE); \
1110 fi
1111
1112 PHONY += _emodinst_post
1113 _emodinst_post: _emodinst_
1114 $(call cmd,depmod)
1115
1116 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1117
1118 PHONY += $(clean-dirs) clean
1119 $(clean-dirs):
1120 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1121
1122 clean: rm-dirs := $(MODVERDIR)
1123 clean: $(clean-dirs)
1124 $(call cmd,rmdirs)
1125 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1126 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1127 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1128 -type f -print | xargs rm -f
1129
1130 help:
1131 @echo ' Building external modules.'
1132 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1133 @echo ''
1134 @echo ' modules - default target, build the module(s)'
1135 @echo ' modules_install - install the module'
1136 @echo ' clean - remove generated files in module directory only'
1137 @echo ''
1138
1139 # Dummies...
1140 PHONY += prepare scripts
1141 prepare: ;
1142 scripts: ;
1143 endif # KBUILD_EXTMOD
1144
1145 # Generate tags for editors
1146 # ---------------------------------------------------------------------------
1147
1148 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1149 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1150 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1151
1152 ifeq ($(src),$(obj))
1153 __srctree =
1154 else
1155 __srctree = $(srctree)/
1156 endif
1157
1158 ifeq ($(ALLSOURCE_ARCHS),)
1159 ifeq ($(ARCH),um)
1160 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1161 else
1162 ALLINCLUDE_ARCHS := $(ARCH)
1163 endif
1164 else
1165 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1166 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1167 endif
1168
1169 ALLSOURCE_ARCHS := $(ARCH)
1170
1171 define all-sources
1172 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1173 \( -name include -o -name arch \) -prune -o \
1174 -name '*.[chS]' -print; \
1175 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1176 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1177 -name '*.[chS]' -print; \
1178 done ; \
1179 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1180 -name '*.[chS]' -print; \
1181 find $(__srctree)include $(RCS_FIND_IGNORE) \
1182 \( -name config -o -name 'asm-*' \) -prune \
1183 -o -name '*.[chS]' -print; \
1184 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1185 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1186 -name '*.[chS]' -print; \
1187 done ; \
1188 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1189 -name '*.[chS]' -print )
1190 endef
1191
1192 quiet_cmd_cscope-file = FILELST cscope.files
1193 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1194
1195 quiet_cmd_cscope = MAKE cscope.out
1196 cmd_cscope = cscope -b
1197
1198 cscope: FORCE
1199 $(call cmd,cscope-file)
1200 $(call cmd,cscope)
1201
1202 quiet_cmd_TAGS = MAKE $@
1203 define cmd_TAGS
1204 rm -f $@; \
1205 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1206 echo "-I __initdata,__exitdata,__acquires,__releases \
1207 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1208 --extra=+f --c-kinds=+px"`; \
1209 $(all-sources) | xargs etags $$ETAGSF -a
1210 endef
1211
1212 TAGS: FORCE
1213 $(call cmd,TAGS)
1214
1215
1216 quiet_cmd_tags = MAKE $@
1217 define cmd_tags
1218 rm -f $@; \
1219 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1220 echo "-I __initdata,__exitdata,__acquires,__releases \
1221 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1222 --extra=+f --c-kinds=+px"`; \
1223 $(all-sources) | xargs ctags $$CTAGSF -a
1224 endef
1225
1226 tags: FORCE
1227 $(call cmd,tags)
1228
1229
1230 # Scripts to check various things for consistency
1231 # ---------------------------------------------------------------------------
1232
1233 includecheck:
1234 find * $(RCS_FIND_IGNORE) \
1235 -name '*.[hcS]' -type f -print | sort \
1236 | xargs $(PERL) -w scripts/checkincludes.pl
1237
1238 versioncheck:
1239 find * $(RCS_FIND_IGNORE) \
1240 -name '*.[hcS]' -type f -print | sort \
1241 | xargs $(PERL) -w scripts/checkversion.pl
1242
1243 namespacecheck:
1244 $(PERL) $(srctree)/scripts/namespace.pl
1245
1246 endif #ifeq ($(config-targets),1)
1247 endif #ifeq ($(mixed-targets),1)
1248
1249 PHONY += checkstack
1250 checkstack:
1251 $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
1252 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1253
1254 kernelrelease:
1255 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1256 $(error kernelrelease not valid - run 'make *config' to update it))
1257 kernelversion:
1258 @echo $(KERNELVERSION)
1259
1260 # Single targets
1261 # ---------------------------------------------------------------------------
1262 # Single targets are compatible with:
1263 # - build whith mixed source and output
1264 # - build with separate output dir 'make O=...'
1265 # - external modules
1266 #
1267 # target-dir => where to store outputfile
1268 # build-dir => directory in kernel source tree to use
1269
1270 ifeq ($(KBUILD_EXTMOD),)
1271 build-dir = $(patsubst %/,%,$(dir $@))
1272 target-dir = $(dir $@)
1273 else
1274 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1275 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1276 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1277 endif
1278
1279 %.s: %.c prepare scripts FORCE
1280 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1281 %.i: %.c prepare scripts FORCE
1282 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1283 %.o: %.c prepare scripts FORCE
1284 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1285 %.lst: %.c prepare scripts FORCE
1286 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1287 %.s: %.S prepare scripts FORCE
1288 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1289 %.o: %.S prepare scripts FORCE
1290 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1291
1292 # Modules
1293 %/: prepare scripts FORCE
1294 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1295 $(build)=$(build-dir)
1296 /: prepare scripts FORCE
1297 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1298 $(build)=$(build-dir)
1299
1300 %.ko: prepare scripts FORCE
1301 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1302 $(build)=$(build-dir) $(@:.ko=.o)
1303 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1304
1305 # FIXME Should go into a make.lib or something
1306 # ===========================================================================
1307
1308 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1309 cmd_rmdirs = rm -rf $(rm-dirs)
1310
1311 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1312 cmd_rmfiles = rm -f $(rm-files)
1313
1314
1315 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1316 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1317 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1318
1319 quiet_cmd_as_o_S = AS $@
1320 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1321
1322 # read all saved command lines
1323
1324 targets := $(wildcard $(sort $(targets)))
1325 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1326
1327 ifneq ($(cmd_files),)
1328 $(cmd_files): ; # Do not try to update included dependency files
1329 include $(cmd_files)
1330 endif
1331
1332 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1333 # Usage:
1334 # $(Q)$(MAKE) $(clean)=dir
1335 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1336
1337 endif # skip-makefile
1338
1339 PHONY += FORCE
1340 FORCE:
1341
1342 -include $(srctree)/Makefile.custom
1343
1344 # Declare the contents of the .PHONY variable as phony. We keep that
1345 # information in a variable se we can use it in if_changed and friends.
1346 .PHONY: $(PHONY)