Contents of /tags/mkinitrd-6_5_0/busybox/Makefile
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Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/Makefile
File size: 42283 byte(s)
Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/Makefile
File size: 42283 byte(s)
-updated to busybox-1.13.4
1 | VERSION = 1 |
2 | PATCHLEVEL = 13 |
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 | endif |
172 | |
173 | # SUBARCH tells the usermode build what the underlying arch is. That is set |
174 | # first, and if a usermode build is happening, the "ARCH=um" on the command |
175 | # line overrides the setting of ARCH below. If a native build is happening, |
176 | # then ARCH is assigned, getting whatever value it gets normally, and |
177 | # SUBARCH is subsequently ignored. |
178 | |
179 | ifneq ($(CROSS_COMPILE),) |
180 | SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1) |
181 | else |
182 | SUBARCH := $(shell uname -m) |
183 | endif |
184 | SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ |
185 | -e s/arm.*/arm/ -e s/sa110/arm/ \ |
186 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
187 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) |
188 | |
189 | ARCH ?= $(SUBARCH) |
190 | |
191 | # Architecture as present in compile.h |
192 | UTS_MACHINE := $(ARCH) |
193 | |
194 | # SHELL used by kbuild |
195 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ |
196 | else if [ -x /bin/bash ]; then echo /bin/bash; \ |
197 | else echo sh; fi ; fi) |
198 | |
199 | # Decide whether to build built-in, modular, or both. |
200 | # Normally, just do built-in. |
201 | |
202 | KBUILD_MODULES := |
203 | KBUILD_BUILTIN := 1 |
204 | |
205 | # If we have only "make modules", don't compile built-in objects. |
206 | # When we're building modules with modversions, we need to consider |
207 | # the built-in objects during the descend as well, in order to |
208 | # make sure the checksums are uptodate before we record them. |
209 | |
210 | ifeq ($(MAKECMDGOALS),modules) |
211 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) |
212 | endif |
213 | |
214 | # If we have "make <whatever> modules", compile modules |
215 | # in addition to whatever we do anyway. |
216 | # Just "make" or "make all" shall build modules as well |
217 | |
218 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
219 | KBUILD_MODULES := 1 |
220 | endif |
221 | |
222 | ifeq ($(MAKECMDGOALS),) |
223 | KBUILD_MODULES := 1 |
224 | endif |
225 | |
226 | export KBUILD_MODULES KBUILD_BUILTIN |
227 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
228 | |
229 | # Beautify output |
230 | # --------------------------------------------------------------------------- |
231 | # |
232 | # Normally, we echo the whole command before executing it. By making |
233 | # that echo $($(quiet)$(cmd)), we now have the possibility to set |
234 | # $(quiet) to choose other forms of output instead, e.g. |
235 | # |
236 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
237 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
238 | # |
239 | # If $(quiet) is empty, the whole command will be printed. |
240 | # If it is set to "quiet_", only the short version will be printed. |
241 | # If it is set to "silent_", nothing wil be printed at all, since |
242 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
243 | # |
244 | # A simple variant is to prefix commands with $(Q) - that's useful |
245 | # for commands that shall be hidden in non-verbose mode. |
246 | # |
247 | # $(Q)ln $@ :< |
248 | # |
249 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
250 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
251 | |
252 | ifeq ($(KBUILD_VERBOSE),1) |
253 | quiet = |
254 | Q = |
255 | else |
256 | quiet=quiet_ |
257 | Q = @ |
258 | endif |
259 | |
260 | # If the user is running make -s (silent mode), suppress echoing of |
261 | # commands |
262 | |
263 | ifneq ($(findstring s,$(MAKEFLAGS)),) |
264 | quiet=silent_ |
265 | endif |
266 | |
267 | export quiet Q KBUILD_VERBOSE |
268 | |
269 | |
270 | # Look for make include files relative to root of kernel src |
271 | MAKEFLAGS += --include-dir=$(srctree) |
272 | |
273 | HOSTCC = gcc |
274 | HOSTCXX = g++ |
275 | HOSTCFLAGS := |
276 | HOSTCXXFLAGS := |
277 | # We need some generic definitions |
278 | include $(srctree)/scripts/Kbuild.include |
279 | |
280 | HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,) |
281 | HOSTCXXFLAGS += -O2 |
282 | |
283 | # For maximum performance (+ possibly random breakage, uncomment |
284 | # the following) |
285 | |
286 | MAKEFLAGS += -rR |
287 | |
288 | # Make variables (CC, etc...) |
289 | |
290 | AS = $(CROSS_COMPILE)as |
291 | CC = $(CROSS_COMPILE)gcc |
292 | LD = $(CC) -nostdlib |
293 | CPP = $(CC) -E |
294 | AR = $(CROSS_COMPILE)ar |
295 | NM = $(CROSS_COMPILE)nm |
296 | STRIP = $(CROSS_COMPILE)strip |
297 | OBJCOPY = $(CROSS_COMPILE)objcopy |
298 | OBJDUMP = $(CROSS_COMPILE)objdump |
299 | AWK = awk |
300 | GENKSYMS = scripts/genksyms/genksyms |
301 | DEPMOD = /sbin/depmod |
302 | KALLSYMS = scripts/kallsyms |
303 | PERL = perl |
304 | CHECK = sparse |
305 | |
306 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) |
307 | MODFLAGS = -DMODULE |
308 | CFLAGS_MODULE = $(MODFLAGS) |
309 | AFLAGS_MODULE = $(MODFLAGS) |
310 | LDFLAGS_MODULE = -r |
311 | CFLAGS_KERNEL = |
312 | AFLAGS_KERNEL = |
313 | |
314 | |
315 | # Use LINUXINCLUDE when you must reference the include/ directory. |
316 | # Needed to be compatible with the O= option |
317 | CFLAGS := $(CFLAGS) |
318 | # Added only to final link stage of busybox binary |
319 | CFLAGS_busybox := $(CFLAGS_busybox) |
320 | CPPFLAGS := $(CPPFLAGS) |
321 | AFLAGS := $(AFLAGS) |
322 | LDFLAGS := $(LDFLAGS) |
323 | LDLIBS := |
324 | |
325 | # Read KERNELRELEASE from .kernelrelease (if it exists) |
326 | KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) |
327 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
328 | |
329 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ |
330 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ |
331 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ |
332 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
333 | |
334 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
335 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
336 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
337 | export FLTFLAGS |
338 | |
339 | # When compiling out-of-tree modules, put MODVERDIR in the module |
340 | # tree rather than in the kernel tree. The kernel tree might |
341 | # even be read-only. |
342 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions |
343 | |
344 | # Files to ignore in find ... statements |
345 | |
346 | 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 |
347 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git |
348 | |
349 | # =========================================================================== |
350 | # Rules shared between *config targets and build targets |
351 | |
352 | # Basic helpers built in scripts/ |
353 | PHONY += scripts_basic |
354 | scripts_basic: |
355 | $(Q)$(MAKE) $(build)=scripts/basic |
356 | |
357 | # To avoid any implicit rule to kick in, define an empty command. |
358 | scripts/basic/%: scripts_basic ; |
359 | |
360 | PHONY += outputmakefile |
361 | # outputmakefile generates a Makefile in the output directory, if using a |
362 | # separate output directory. This allows convenient use of make in the |
363 | # output directory. |
364 | outputmakefile: |
365 | ifneq ($(KBUILD_SRC),) |
366 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
367 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) |
368 | endif |
369 | |
370 | # To make sure we do not include .config for any of the *config targets |
371 | # catch them early, and hand them over to scripts/kconfig/Makefile |
372 | # It is allowed to specify more targets when calling make, including |
373 | # mixing *config targets and build targets. |
374 | # For example 'make oldconfig all'. |
375 | # Detect when mixed targets is specified, and make a second invocation |
376 | # of make so .config is not included in this case either (for *config). |
377 | |
378 | no-dot-config-targets := clean mrproper distclean \ |
379 | cscope TAGS tags help %docs |
380 | #bbox# check% is removed from above |
381 | |
382 | config-targets := 0 |
383 | mixed-targets := 0 |
384 | dot-config := 1 |
385 | |
386 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
387 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
388 | dot-config := 0 |
389 | endif |
390 | endif |
391 | |
392 | ifeq ($(KBUILD_EXTMOD),) |
393 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
394 | config-targets := 1 |
395 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) |
396 | mixed-targets := 1 |
397 | endif |
398 | endif |
399 | endif |
400 | |
401 | ifeq ($(mixed-targets),1) |
402 | # =========================================================================== |
403 | # We're called with mixed targets (*config and build targets). |
404 | # Handle them one by one. |
405 | |
406 | %:: FORCE |
407 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ |
408 | |
409 | else |
410 | ifeq ($(config-targets),1) |
411 | # =========================================================================== |
412 | # *config targets only - make sure prerequisites are updated, and descend |
413 | # in scripts/kconfig to make the *config target |
414 | |
415 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
416 | # KBUILD_DEFCONFIG may point out an alternative default configuration |
417 | # used for 'make defconfig' |
418 | -include $(srctree)/arch/$(ARCH)/Makefile |
419 | export KBUILD_DEFCONFIG |
420 | |
421 | config %config: scripts_basic outputmakefile FORCE |
422 | $(Q)mkdir -p include |
423 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
424 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease |
425 | |
426 | else |
427 | # =========================================================================== |
428 | # Build targets only - this includes busybox, arch specific targets, clean |
429 | # targets and others. In general all targets except *config targets. |
430 | |
431 | ifeq ($(KBUILD_EXTMOD),) |
432 | # Additional helpers built in scripts/ |
433 | # Carefully list dependencies so we do not try to build scripts twice |
434 | # in parrallel |
435 | PHONY += scripts |
436 | scripts: scripts_basic include/config/MARKER |
437 | $(Q)$(MAKE) $(build)=$(@) |
438 | |
439 | scripts_basic: include/autoconf.h |
440 | |
441 | # Objects we will link into busybox / subdirs we need to visit |
442 | core-y := \ |
443 | applets/ \ |
444 | |
445 | libs-y := \ |
446 | archival/ \ |
447 | archival/libunarchive/ \ |
448 | console-tools/ \ |
449 | coreutils/ \ |
450 | coreutils/libcoreutils/ \ |
451 | debianutils/ \ |
452 | e2fsprogs/ \ |
453 | editors/ \ |
454 | findutils/ \ |
455 | init/ \ |
456 | libbb/ \ |
457 | libpwdgrp/ \ |
458 | loginutils/ \ |
459 | mailutils/ \ |
460 | miscutils/ \ |
461 | modutils/ \ |
462 | networking/ \ |
463 | networking/libiproute/ \ |
464 | networking/udhcp/ \ |
465 | printutils/ \ |
466 | procps/ \ |
467 | runit/ \ |
468 | selinux/ \ |
469 | shell/ \ |
470 | sysklogd/ \ |
471 | util-linux/ \ |
472 | util-linux/volume_id/ \ |
473 | |
474 | endif # KBUILD_EXTMOD |
475 | |
476 | ifeq ($(dot-config),1) |
477 | # In this section, we need .config |
478 | |
479 | # Read in dependencies to all Kconfig* files, make sure to run |
480 | # oldconfig if changes are detected. |
481 | -include .kconfig.d |
482 | |
483 | -include .config |
484 | |
485 | # If .config needs to be updated, it will be done via the dependency |
486 | # that autoconf has on .config. |
487 | # To avoid any implicit rule to kick in, define an empty command |
488 | .config .kconfig.d: ; |
489 | |
490 | # Now we can define CFLAGS etc according to .config |
491 | include $(srctree)/Makefile.flags |
492 | |
493 | # If .config is newer than include/autoconf.h, someone tinkered |
494 | # with it and forgot to run make oldconfig. |
495 | # If kconfig.d is missing then we are probarly in a cleaned tree so |
496 | # we execute the config step to be sure to catch updated Kconfig files |
497 | include/autoconf.h: .kconfig.d .config |
498 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
499 | |
500 | else |
501 | # Dummy target needed, because used as prerequisite |
502 | include/autoconf.h: ; |
503 | endif |
504 | |
505 | # The all: target is the default when no target is given on the |
506 | # command line. |
507 | # This allow a user to issue only 'make' to build a kernel including modules |
508 | # Defaults busybox but it is usually overridden in the arch makefile |
509 | all: busybox doc |
510 | |
511 | -include $(srctree)/arch/$(ARCH)/Makefile |
512 | |
513 | # arch Makefile may override CC so keep this after arch Makefile is included |
514 | #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
515 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
516 | |
517 | # Default kernel image to build when no specific target is given. |
518 | # KBUILD_IMAGE may be overruled on the commandline or |
519 | # set in the environment |
520 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
521 | # this default value |
522 | export KBUILD_IMAGE ?= busybox |
523 | |
524 | # |
525 | # INSTALL_PATH specifies where to place the updated kernel and system map |
526 | # images. Default is /boot, but you can set it to other values |
527 | export INSTALL_PATH ?= /boot |
528 | |
529 | # |
530 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
531 | # relocations required by build roots. This is not defined in the |
532 | # makefile but the arguement can be passed to make if needed. |
533 | # |
534 | |
535 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
536 | export MODLIB |
537 | |
538 | |
539 | ifeq ($(KBUILD_EXTMOD),) |
540 | busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) |
541 | |
542 | busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ |
543 | $(core-n) $(core-) $(libs-n) $(libs-) \ |
544 | ))) |
545 | |
546 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) |
547 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
548 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) |
549 | libs-y := $(libs-y1) $(libs-y2) |
550 | |
551 | # Build busybox |
552 | # --------------------------------------------------------------------------- |
553 | # busybox is build from the objects selected by $(busybox-init) and |
554 | # $(busybox-main). Most are built-in.o files from top-level directories |
555 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile. |
556 | # Ordering when linking is important, and $(busybox-init) must be first. |
557 | # |
558 | # busybox |
559 | # ^ |
560 | # | |
561 | # +-< $(busybox-init) |
562 | # | +--< init/version.o + more |
563 | # | |
564 | # +--< $(busybox-main) |
565 | # | +--< driver/built-in.o mm/built-in.o + more |
566 | # | |
567 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) |
568 | # |
569 | # busybox version (uname -v) cannot be updated during normal |
570 | # descending-into-subdirs phase since we do not yet know if we need to |
571 | # update busybox. |
572 | # Therefore this step is delayed until just before final link of busybox - |
573 | # except in the kallsyms case where it is done just before adding the |
574 | # symbols to the kernel. |
575 | # |
576 | # System.map is generated to document addresses of all kernel symbols |
577 | |
578 | busybox-all := $(core-y) $(libs-y) |
579 | |
580 | # Rule to link busybox - also used during CONFIG_KALLSYMS |
581 | # May be overridden by arch/$(ARCH)/Makefile |
582 | quiet_cmd_busybox__ ?= LINK $@ |
583 | cmd_busybox__ ?= $(srctree)/scripts/trylink \ |
584 | "$@" \ |
585 | "$(CC)" \ |
586 | "$(CFLAGS) $(CFLAGS_busybox)" \ |
587 | "$(LDFLAGS) $(EXTRA_LDFLAGS)" \ |
588 | "$(core-y)" \ |
589 | "$(libs-y)" \ |
590 | "$(LDLIBS)" |
591 | |
592 | # Generate System.map |
593 | quiet_cmd_sysmap = SYSMAP |
594 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap |
595 | |
596 | # Link of busybox |
597 | # If CONFIG_KALLSYMS is set .version is already updated |
598 | # Generate System.map and verify that the content is consistent |
599 | # Use + in front of the busybox_version rule to silent warning with make -j2 |
600 | # First command is ':' to allow us to use + in front of the rule |
601 | define rule_busybox__ |
602 | : |
603 | $(call cmd,busybox__) |
604 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd |
605 | endef |
606 | |
607 | |
608 | ifdef CONFIG_KALLSYMS |
609 | # Generate section listing all symbols and add it into busybox $(kallsyms.o) |
610 | # It's a three stage process: |
611 | # o .tmp_busybox1 has all symbols and sections, but __kallsyms is |
612 | # empty |
613 | # Running kallsyms on that gives us .tmp_kallsyms1.o with |
614 | # the right size - busybox version (uname -v) is updated during this step |
615 | # o .tmp_busybox2 now has a __kallsyms section of the right size, |
616 | # but due to the added section, some addresses have shifted. |
617 | # From here, we generate a correct .tmp_kallsyms2.o |
618 | # o The correct .tmp_kallsyms2.o is linked into the final busybox. |
619 | # o Verify that the System.map from busybox matches the map from |
620 | # .tmp_busybox2, just in case we did not generate kallsyms correctly. |
621 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using |
622 | # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a |
623 | # temporary bypass to allow the kernel to be built while the |
624 | # maintainers work out what went wrong with kallsyms. |
625 | |
626 | ifdef CONFIG_KALLSYMS_EXTRA_PASS |
627 | last_kallsyms := 3 |
628 | else |
629 | last_kallsyms := 2 |
630 | endif |
631 | |
632 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o |
633 | |
634 | define verify_kallsyms |
635 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
636 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ |
637 | $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map |
638 | $(Q)cmp -s System.map .tmp_System.map || \ |
639 | (echo Inconsistent kallsyms data; \ |
640 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ |
641 | rm .tmp_kallsyms* ; /bin/false ) |
642 | endef |
643 | |
644 | # Update busybox version before link |
645 | # Use + in front of this rule to silent warning about make -j1 |
646 | # First command is ':' to allow us to use + in front of this rule |
647 | cmd_ksym_ld = $(cmd_busybox__) |
648 | define rule_ksym_ld |
649 | : |
650 | +$(call cmd,busybox_version) |
651 | $(call cmd,busybox__) |
652 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd |
653 | endef |
654 | |
655 | # Generate .S file with all kernel symbols |
656 | quiet_cmd_kallsyms = KSYM $@ |
657 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ |
658 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ |
659 | |
660 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE |
661 | $(call if_changed_dep,as_o_S) |
662 | |
663 | .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) |
664 | $(call cmd,kallsyms) |
665 | |
666 | # .tmp_busybox1 must be complete except kallsyms, so update busybox version |
667 | .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE |
668 | $(call if_changed_rule,ksym_ld) |
669 | |
670 | .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE |
671 | $(call if_changed,busybox__) |
672 | |
673 | .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE |
674 | $(call if_changed,busybox__) |
675 | |
676 | # Needs to visit scripts/ before $(KALLSYMS) can be used. |
677 | $(KALLSYMS): scripts ; |
678 | |
679 | # Generate some data for debugging strange kallsyms problems |
680 | debug_kallsyms: .tmp_map$(last_kallsyms) |
681 | |
682 | .tmp_map%: .tmp_busybox% FORCE |
683 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ |
684 | |
685 | .tmp_map3: .tmp_map2 |
686 | |
687 | .tmp_map2: .tmp_map1 |
688 | |
689 | endif # ifdef CONFIG_KALLSYMS |
690 | |
691 | # busybox image - including updated kernel symbols |
692 | busybox_unstripped: $(busybox-all) FORCE |
693 | $(call if_changed_rule,busybox__) |
694 | $(Q)rm -f .old_version |
695 | |
696 | busybox: busybox_unstripped |
697 | ifeq ($(SKIP_STRIP),y) |
698 | $(Q)cp $< $@ |
699 | else |
700 | $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \ |
701 | busybox_unstripped -o $@ |
702 | # strip is confused by PIE executable and does not set exec bits |
703 | $(Q)chmod a+x $@ |
704 | endif |
705 | |
706 | # The actual objects are generated when descending, |
707 | # make sure no implicit rule kicks in |
708 | $(sort $(busybox-all)): $(busybox-dirs) ; |
709 | |
710 | # Handle descending into subdirectories listed in $(busybox-dirs) |
711 | # Preset locale variables to speed up the build process. Limit locale |
712 | # tweaks to this spot to avoid wrong language settings when running |
713 | # make menuconfig etc. |
714 | # Error messages still appears in the original language |
715 | |
716 | PHONY += $(busybox-dirs) |
717 | $(busybox-dirs): prepare scripts |
718 | $(Q)$(MAKE) $(build)=$@ |
719 | |
720 | # Build the kernel release string |
721 | # The KERNELRELEASE is stored in a file named .kernelrelease |
722 | # to be used when executing for example make install or make modules_install |
723 | # |
724 | # Take the contents of any files called localversion* and the config |
725 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. |
726 | # LOCALVERSION from the command line override all of this |
727 | |
728 | nullstring := |
729 | space := $(nullstring) # end of line |
730 | |
731 | ___localver = $(objtree)/localversion* $(srctree)/localversion* |
732 | __localver = $(sort $(wildcard $(___localver))) |
733 | # skip backup files (containing '~') |
734 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) |
735 | |
736 | localver = $(subst $(space),, \ |
737 | $(shell cat /dev/null $(_localver)) \ |
738 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) |
739 | |
740 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called |
741 | # and if the SCM is know a tag from the SCM is appended. |
742 | # The appended tag is determinded by the SCM used. |
743 | # |
744 | # Currently, only git is supported. |
745 | # Other SCMs can edit scripts/setlocalversion and add the appropriate |
746 | # checks as needed. |
747 | ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO |
748 | _localver-auto = $(shell $(CONFIG_SHELL) \ |
749 | $(srctree)/scripts/setlocalversion $(srctree)) |
750 | localver-auto = $(LOCALVERSION)$(_localver-auto) |
751 | endif |
752 | |
753 | localver-full = $(localver)$(localver-auto) |
754 | |
755 | # Store (new) KERNELRELASE string in .kernelrelease |
756 | kernelrelease = $(KERNELVERSION)$(localver-full) |
757 | .kernelrelease: FORCE |
758 | $(Q)rm -f $@ |
759 | $(Q)echo $(kernelrelease) > $@ |
760 | |
761 | |
762 | # Things we need to do before we recursively start building the kernel |
763 | # or the modules are listed in "prepare". |
764 | # A multi level approach is used. prepareN is processed before prepareN-1. |
765 | # archprepare is used in arch Makefiles and when processed asm symlink, |
766 | # version.h and scripts_basic is processed / created. |
767 | |
768 | # Listed in dependency order |
769 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
770 | |
771 | # prepare-all is deprecated, use prepare as valid replacement |
772 | PHONY += prepare-all |
773 | |
774 | # prepare3 is used to check if we are building in a separate output directory, |
775 | # and if so do: |
776 | # 1) Check that make has not been executed in the kernel src $(srctree) |
777 | # 2) Create the include2 directory, used for the second asm symlink |
778 | prepare3: .kernelrelease |
779 | ifneq ($(KBUILD_SRC),) |
780 | @echo ' Using $(srctree) as source for busybox' |
781 | $(Q)if [ -f $(srctree)/.config ]; then \ |
782 | echo " $(srctree) is not clean, please run 'make mrproper'";\ |
783 | echo " in the '$(srctree)' directory.";\ |
784 | /bin/false; \ |
785 | fi; |
786 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; |
787 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm |
788 | endif |
789 | |
790 | # prepare2 creates a makefile if using a separate output directory |
791 | prepare2: prepare3 outputmakefile |
792 | |
793 | prepare1: prepare2 include/config/MARKER |
794 | ifneq ($(KBUILD_MODULES),) |
795 | $(Q)mkdir -p $(MODVERDIR) |
796 | $(Q)rm -f $(MODVERDIR)/* |
797 | endif |
798 | |
799 | archprepare: prepare1 scripts_basic |
800 | |
801 | prepare0: archprepare FORCE |
802 | $(Q)$(MAKE) $(build)=. |
803 | |
804 | # All the preparing.. |
805 | prepare prepare-all: prepare0 |
806 | |
807 | # Leave this as default for preprocessing busybox.lds.S, which is now |
808 | # done in arch/$(ARCH)/kernel/Makefile |
809 | |
810 | export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) |
811 | |
812 | # FIXME: The asm symlink changes when $(ARCH) changes. That's |
813 | # hard to detect, but I suppose "make mrproper" is a good idea |
814 | # before switching between archs anyway. |
815 | |
816 | #bbox# include/asm: |
817 | #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' |
818 | #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; |
819 | #bbox# @ln -fsn asm-$(ARCH) $@ |
820 | |
821 | # Split autoconf.h into include/linux/config/* |
822 | quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h |
823 | cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs > include/bbconfigopts.h |
824 | quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/* |
825 | cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config |
826 | #bbox# piggybacked generation of few .h files |
827 | include/config/MARKER: scripts/basic/split-include include/autoconf.h |
828 | $(call cmd,split_autoconf) |
829 | $(call cmd,gen_bbconfigopts) |
830 | @touch $@ |
831 | |
832 | # Generate some files |
833 | # --------------------------------------------------------------------------- |
834 | |
835 | # KERNELRELEASE can change from a few different places, meaning version.h |
836 | # needs to be updated, so this check is forced on all builds |
837 | |
838 | uts_len := 64 |
839 | |
840 | define filechk_version.h |
841 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
842 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
843 | exit 1; \ |
844 | fi; \ |
845 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ |
846 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ |
847 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ |
848 | ) |
849 | endef |
850 | |
851 | # --------------------------------------------------------------------------- |
852 | |
853 | PHONY += depend dep |
854 | depend dep: |
855 | @echo '*** Warning: make $@ is unnecessary now.' |
856 | |
857 | # --------------------------------------------------------------------------- |
858 | # Modules |
859 | |
860 | ifdef _BB_DISABLED_CONFIG_MODULES |
861 | |
862 | # By default, build modules as well |
863 | |
864 | all: modules |
865 | |
866 | # Build modules |
867 | |
868 | PHONY += modules |
869 | modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) |
870 | @echo ' Building modules, stage 2.'; |
871 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
872 | |
873 | |
874 | # Target to prepare building external modules |
875 | PHONY += modules_prepare |
876 | modules_prepare: prepare scripts |
877 | |
878 | # Target to install modules |
879 | PHONY += modules_install |
880 | modules_install: _modinst_ _modinst_post |
881 | |
882 | PHONY += _modinst_ |
883 | _modinst_: |
884 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ |
885 | echo "Warning: you may need to install module-init-tools"; \ |
886 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ |
887 | sleep 1; \ |
888 | fi |
889 | @rm -rf $(MODLIB)/kernel |
890 | @rm -f $(MODLIB)/source |
891 | @mkdir -p $(MODLIB)/kernel |
892 | @ln -s $(srctree) $(MODLIB)/source |
893 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
894 | rm -f $(MODLIB)/build ; \ |
895 | ln -s $(objtree) $(MODLIB)/build ; \ |
896 | fi |
897 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst |
898 | |
899 | # If System.map exists, run depmod. This deliberately does not have a |
900 | # dependency on System.map since that would run the dependency tree on |
901 | # busybox. This depmod is only for convenience to give the initial |
902 | # boot a modules.dep even before / is mounted read-write. However the |
903 | # boot script depmod is the master version. |
904 | ifeq "$(strip $(INSTALL_MOD_PATH))" "" |
905 | depmod_opts := |
906 | else |
907 | depmod_opts := -b $(INSTALL_MOD_PATH) -r |
908 | endif |
909 | PHONY += _modinst_post |
910 | _modinst_post: _modinst_ |
911 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi |
912 | |
913 | else # CONFIG_MODULES |
914 | |
915 | # Modules not configured |
916 | # --------------------------------------------------------------------------- |
917 | |
918 | modules modules_install: FORCE |
919 | @echo |
920 | @echo "The present busybox configuration has modules disabled." |
921 | @echo "Type 'make config' and enable loadable module support." |
922 | @echo "Then build a kernel with module support enabled." |
923 | @echo |
924 | @exit 1 |
925 | |
926 | endif # CONFIG_MODULES |
927 | |
928 | ### |
929 | # Cleaning is done on three levels. |
930 | # make clean Delete most generated files |
931 | # Leave enough to build external modules |
932 | # make mrproper Delete the current configuration, and all generated files |
933 | # make distclean Remove editor backup files, patch leftover files and the like |
934 | |
935 | # Directories & files removed with 'make clean' |
936 | CLEAN_DIRS += $(MODVERDIR) _install 0_lib |
937 | CLEAN_FILES += busybox busybox_unstripped* busybox.links \ |
938 | System.map .kernelrelease \ |
939 | .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map |
940 | |
941 | # Directories & files removed with 'make mrproper' |
942 | MRPROPER_DIRS += include/config include2 |
943 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ |
944 | include/autoconf.h \ |
945 | include/bbconfigopts.h \ |
946 | include/usage_compressed.h \ |
947 | include/applet_tables.h \ |
948 | applets/usage \ |
949 | .kernelrelease Module.symvers tags TAGS cscope* \ |
950 | busybox_old |
951 | |
952 | # clean - Delete most, but leave enough to build external modules |
953 | # |
954 | clean: rm-dirs := $(CLEAN_DIRS) |
955 | clean: rm-files := $(CLEAN_FILES) |
956 | clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs)) |
957 | |
958 | PHONY += $(clean-dirs) clean archclean |
959 | $(clean-dirs): |
960 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
961 | |
962 | clean: archclean $(clean-dirs) |
963 | $(call cmd,rmdirs) |
964 | $(call cmd,rmfiles) |
965 | @find . $(RCS_FIND_IGNORE) \ |
966 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
967 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
968 | -type f -print | xargs rm -f |
969 | |
970 | PHONY += doc-clean |
971 | doc-clean: rm-files := docs/busybox.pod \ |
972 | docs/BusyBox.html docs/BusyBox.1 docs/BusyBox.txt |
973 | doc-clean: |
974 | $(call cmd,rmfiles) |
975 | |
976 | # mrproper - Delete all generated files, including .config |
977 | # |
978 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
979 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
980 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
981 | |
982 | PHONY += $(mrproper-dirs) mrproper archmrproper |
983 | $(mrproper-dirs): |
984 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
985 | |
986 | mrproper: clean archmrproper $(mrproper-dirs) |
987 | $(call cmd,rmdirs) |
988 | $(call cmd,rmfiles) |
989 | |
990 | # distclean |
991 | # |
992 | PHONY += distclean |
993 | |
994 | distclean: mrproper |
995 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
996 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
997 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
998 | -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \ |
999 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ |
1000 | -type f -print | xargs rm -f |
1001 | |
1002 | |
1003 | # Packaging of the kernel to various formats |
1004 | # --------------------------------------------------------------------------- |
1005 | # rpm target kept for backward compatibility |
1006 | package-dir := $(srctree)/scripts/package |
1007 | |
1008 | %pkg: FORCE |
1009 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1010 | rpm: FORCE |
1011 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1012 | |
1013 | |
1014 | # Brief documentation of the typical targets used |
1015 | # --------------------------------------------------------------------------- |
1016 | |
1017 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) |
1018 | boards := $(notdir $(boards)) |
1019 | |
1020 | -include $(srctree)/Makefile.help |
1021 | |
1022 | # Documentation targets |
1023 | # --------------------------------------------------------------------------- |
1024 | %docs: scripts_basic FORCE |
1025 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ |
1026 | |
1027 | else # KBUILD_EXTMOD |
1028 | |
1029 | ### |
1030 | # External module support. |
1031 | # When building external modules the kernel used as basis is considered |
1032 | # read-only, and no consistency checks are made and the make |
1033 | # system is not used on the basis kernel. If updates are required |
1034 | # in the basis kernel ordinary make commands (without M=...) must |
1035 | # be used. |
1036 | # |
1037 | # The following are the only valid targets when building external |
1038 | # modules. |
1039 | # make M=dir clean Delete all automatically generated files |
1040 | # make M=dir modules Make all modules in specified dir |
1041 | # make M=dir Same as 'make M=dir modules' |
1042 | # make M=dir modules_install |
1043 | # Install the modules build in the module directory |
1044 | # Assumes install directory is already created |
1045 | |
1046 | # We are always building modules |
1047 | KBUILD_MODULES := 1 |
1048 | PHONY += crmodverdir |
1049 | crmodverdir: |
1050 | $(Q)mkdir -p $(MODVERDIR) |
1051 | $(Q)rm -f $(MODVERDIR)/* |
1052 | |
1053 | PHONY += $(objtree)/Module.symvers |
1054 | $(objtree)/Module.symvers: |
1055 | @test -e $(objtree)/Module.symvers || ( \ |
1056 | echo; \ |
1057 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ |
1058 | echo " is missing; modules will have no dependencies and modversions."; \ |
1059 | echo ) |
1060 | |
1061 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) |
1062 | PHONY += $(module-dirs) modules |
1063 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
1064 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
1065 | |
1066 | modules: $(module-dirs) |
1067 | @echo ' Building modules, stage 2.'; |
1068 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
1069 | |
1070 | PHONY += modules_install |
1071 | modules_install: _emodinst_ _emodinst_post |
1072 | |
1073 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1074 | PHONY += _emodinst_ |
1075 | _emodinst_: |
1076 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
1077 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst |
1078 | |
1079 | # Run depmod only is we have System.map and depmod is executable |
1080 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
1081 | cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ |
1082 | $(DEPMOD) -ae -F System.map \ |
1083 | $(if $(strip $(INSTALL_MOD_PATH)), \ |
1084 | -b $(INSTALL_MOD_PATH) -r) \ |
1085 | $(KERNELRELEASE); \ |
1086 | fi |
1087 | |
1088 | PHONY += _emodinst_post |
1089 | _emodinst_post: _emodinst_ |
1090 | $(call cmd,depmod) |
1091 | |
1092 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1093 | |
1094 | PHONY += $(clean-dirs) clean |
1095 | $(clean-dirs): |
1096 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
1097 | |
1098 | clean: rm-dirs := $(MODVERDIR) |
1099 | clean: $(clean-dirs) |
1100 | $(call cmd,rmdirs) |
1101 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ |
1102 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
1103 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
1104 | -type f -print | xargs rm -f |
1105 | |
1106 | help: |
1107 | @echo ' Building external modules.' |
1108 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' |
1109 | @echo '' |
1110 | @echo ' modules - default target, build the module(s)' |
1111 | @echo ' modules_install - install the module' |
1112 | @echo ' clean - remove generated files in module directory only' |
1113 | @echo '' |
1114 | |
1115 | # Dummies... |
1116 | PHONY += prepare scripts |
1117 | prepare: ; |
1118 | scripts: ; |
1119 | endif # KBUILD_EXTMOD |
1120 | |
1121 | # Generate tags for editors |
1122 | # --------------------------------------------------------------------------- |
1123 | |
1124 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set |
1125 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. |
1126 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! |
1127 | |
1128 | ifeq ($(src),$(obj)) |
1129 | __srctree = |
1130 | else |
1131 | __srctree = $(srctree)/ |
1132 | endif |
1133 | |
1134 | ifeq ($(ALLSOURCE_ARCHS),) |
1135 | ifeq ($(ARCH),um) |
1136 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) |
1137 | else |
1138 | ALLINCLUDE_ARCHS := $(ARCH) |
1139 | endif |
1140 | else |
1141 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. |
1142 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) |
1143 | endif |
1144 | |
1145 | ALLSOURCE_ARCHS := $(ARCH) |
1146 | |
1147 | define all-sources |
1148 | ( find $(__srctree) $(RCS_FIND_IGNORE) \ |
1149 | \( -name include -o -name arch \) -prune -o \ |
1150 | -name '*.[chS]' -print; \ |
1151 | for ARCH in $(ALLSOURCE_ARCHS) ; do \ |
1152 | find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ |
1153 | -name '*.[chS]' -print; \ |
1154 | done ; \ |
1155 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ |
1156 | -name '*.[chS]' -print; \ |
1157 | find $(__srctree)include $(RCS_FIND_IGNORE) \ |
1158 | \( -name config -o -name 'asm-*' \) -prune \ |
1159 | -o -name '*.[chS]' -print; \ |
1160 | for ARCH in $(ALLINCLUDE_ARCHS) ; do \ |
1161 | find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ |
1162 | -name '*.[chS]' -print; \ |
1163 | done ; \ |
1164 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ |
1165 | -name '*.[chS]' -print ) |
1166 | endef |
1167 | |
1168 | quiet_cmd_cscope-file = FILELST cscope.files |
1169 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files |
1170 | |
1171 | quiet_cmd_cscope = MAKE cscope.out |
1172 | cmd_cscope = cscope -b |
1173 | |
1174 | cscope: FORCE |
1175 | $(call cmd,cscope-file) |
1176 | $(call cmd,cscope) |
1177 | |
1178 | quiet_cmd_TAGS = MAKE $@ |
1179 | define cmd_TAGS |
1180 | rm -f $@; \ |
1181 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ |
1182 | echo "-I __initdata,__exitdata,__acquires,__releases \ |
1183 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ |
1184 | --extra=+f --c-kinds=+px"`; \ |
1185 | $(all-sources) | xargs etags $$ETAGSF -a |
1186 | endef |
1187 | |
1188 | TAGS: FORCE |
1189 | $(call cmd,TAGS) |
1190 | |
1191 | |
1192 | quiet_cmd_tags = MAKE $@ |
1193 | define cmd_tags |
1194 | rm -f $@; \ |
1195 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ |
1196 | echo "-I __initdata,__exitdata,__acquires,__releases \ |
1197 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ |
1198 | --extra=+f --c-kinds=+px"`; \ |
1199 | $(all-sources) | xargs ctags $$CTAGSF -a |
1200 | endef |
1201 | |
1202 | tags: FORCE |
1203 | $(call cmd,tags) |
1204 | |
1205 | |
1206 | # Scripts to check various things for consistency |
1207 | # --------------------------------------------------------------------------- |
1208 | |
1209 | includecheck: |
1210 | find * $(RCS_FIND_IGNORE) \ |
1211 | -name '*.[hcS]' -type f -print | sort \ |
1212 | | xargs $(PERL) -w scripts/checkincludes.pl |
1213 | |
1214 | versioncheck: |
1215 | find * $(RCS_FIND_IGNORE) \ |
1216 | -name '*.[hcS]' -type f -print | sort \ |
1217 | | xargs $(PERL) -w scripts/checkversion.pl |
1218 | |
1219 | namespacecheck: |
1220 | $(PERL) $(srctree)/scripts/namespace.pl |
1221 | |
1222 | endif #ifeq ($(config-targets),1) |
1223 | endif #ifeq ($(mixed-targets),1) |
1224 | |
1225 | PHONY += checkstack |
1226 | checkstack: |
1227 | $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ |
1228 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH) |
1229 | |
1230 | kernelrelease: |
1231 | $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ |
1232 | $(error kernelrelease not valid - run 'make *config' to update it)) |
1233 | kernelversion: |
1234 | @echo $(KERNELVERSION) |
1235 | |
1236 | # Single targets |
1237 | # --------------------------------------------------------------------------- |
1238 | # Single targets are compatible with: |
1239 | # - build whith mixed source and output |
1240 | # - build with separate output dir 'make O=...' |
1241 | # - external modules |
1242 | # |
1243 | # target-dir => where to store outputfile |
1244 | # build-dir => directory in kernel source tree to use |
1245 | |
1246 | ifeq ($(KBUILD_EXTMOD),) |
1247 | build-dir = $(patsubst %/,%,$(dir $@)) |
1248 | target-dir = $(dir $@) |
1249 | else |
1250 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) |
1251 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) |
1252 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) |
1253 | endif |
1254 | |
1255 | %.s: %.c prepare scripts FORCE |
1256 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1257 | %.i: %.c prepare scripts FORCE |
1258 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1259 | %.o: %.c prepare scripts FORCE |
1260 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1261 | %.lst: %.c prepare scripts FORCE |
1262 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1263 | %.s: %.S prepare scripts FORCE |
1264 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1265 | %.o: %.S prepare scripts FORCE |
1266 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1267 | |
1268 | # Modules |
1269 | / %/: prepare scripts FORCE |
1270 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
1271 | $(build)=$(build-dir) |
1272 | %.ko: prepare scripts FORCE |
1273 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
1274 | $(build)=$(build-dir) $(@:.ko=.o) |
1275 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
1276 | |
1277 | # FIXME Should go into a make.lib or something |
1278 | # =========================================================================== |
1279 | |
1280 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) |
1281 | cmd_rmdirs = rm -rf $(rm-dirs) |
1282 | |
1283 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
1284 | cmd_rmfiles = rm -f $(rm-files) |
1285 | |
1286 | |
1287 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ |
1288 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \ |
1289 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) |
1290 | |
1291 | quiet_cmd_as_o_S = AS $@ |
1292 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
1293 | |
1294 | # read all saved command lines |
1295 | |
1296 | targets := $(wildcard $(sort $(targets))) |
1297 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
1298 | |
1299 | ifneq ($(cmd_files),) |
1300 | $(cmd_files): ; # Do not try to update included dependency files |
1301 | include $(cmd_files) |
1302 | endif |
1303 | |
1304 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
1305 | # Usage: |
1306 | # $(Q)$(MAKE) $(clean)=dir |
1307 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj |
1308 | |
1309 | endif # skip-makefile |
1310 | |
1311 | PHONY += FORCE |
1312 | FORCE: |
1313 | |
1314 | -include $(srctree)/Makefile.custom |
1315 | |
1316 | # Declare the contents of the .PHONY variable as phony. We keep that |
1317 | # information in a variable se we can use it in if_changed and friends. |
1318 | .PHONY: $(PHONY) |