Annotation of /tags/mkinitrd-6_1_3/busybox/Makefile
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/Makefile
File size: 41165 byte(s)
Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/Makefile
File size: 41165 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | niro | 532 | VERSION = 1 |
2 | PATCHLEVEL = 4 | ||
3 | SUBLEVEL = 2 | ||
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 | # SUBARCH tells the usermode build what the underlying arch is. That is set | ||
146 | # first, and if a usermode build is happening, the "ARCH=um" on the command | ||
147 | # line overrides the setting of ARCH below. If a native build is happening, | ||
148 | # then ARCH is assigned, getting whatever value it gets normally, and | ||
149 | # SUBARCH is subsequently ignored. | ||
150 | |||
151 | SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ | ||
152 | -e s/arm.*/arm/ -e s/sa110/arm/ \ | ||
153 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ | ||
154 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) | ||
155 | |||
156 | # Cross compiling and selecting different set of gcc/bin-utils | ||
157 | # --------------------------------------------------------------------------- | ||
158 | # | ||
159 | # When performing cross compilation for other architectures ARCH shall be set | ||
160 | # to the target architecture. (See arch/* for the possibilities). | ||
161 | # ARCH can be set during invocation of make: | ||
162 | # make ARCH=ia64 | ||
163 | # Another way is to have ARCH set in the environment. | ||
164 | # The default ARCH is the host where make is executed. | ||
165 | |||
166 | # CROSS_COMPILE specify the prefix used for all executables used | ||
167 | # during compilation. Only gcc and related bin-utils executables | ||
168 | # are prefixed with $(CROSS_COMPILE). | ||
169 | # CROSS_COMPILE can be set on the command line | ||
170 | # make CROSS_COMPILE=ia64-linux- | ||
171 | # Alternatively CROSS_COMPILE can be set in the environment. | ||
172 | # Default value for CROSS_COMPILE is not to prefix executables | ||
173 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | ||
174 | |||
175 | ARCH ?= $(SUBARCH) | ||
176 | CROSS_COMPILE ?= | ||
177 | |||
178 | # Architecture as present in compile.h | ||
179 | UTS_MACHINE := $(ARCH) | ||
180 | |||
181 | # SHELL used by kbuild | ||
182 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | ||
183 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | ||
184 | else echo sh; fi ; fi) | ||
185 | |||
186 | HOSTCC = gcc | ||
187 | HOSTCXX = g++ | ||
188 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer | ||
189 | HOSTCXXFLAGS = -O2 | ||
190 | |||
191 | # Decide whether to build built-in, modular, or both. | ||
192 | # Normally, just do built-in. | ||
193 | |||
194 | KBUILD_MODULES := | ||
195 | KBUILD_BUILTIN := 1 | ||
196 | |||
197 | # If we have only "make modules", don't compile built-in objects. | ||
198 | # When we're building modules with modversions, we need to consider | ||
199 | # the built-in objects during the descend as well, in order to | ||
200 | # make sure the checksums are uptodate before we record them. | ||
201 | |||
202 | ifeq ($(MAKECMDGOALS),modules) | ||
203 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | ||
204 | endif | ||
205 | |||
206 | # If we have "make <whatever> modules", compile modules | ||
207 | # in addition to whatever we do anyway. | ||
208 | # Just "make" or "make all" shall build modules as well | ||
209 | |||
210 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | ||
211 | KBUILD_MODULES := 1 | ||
212 | endif | ||
213 | |||
214 | ifeq ($(MAKECMDGOALS),) | ||
215 | KBUILD_MODULES := 1 | ||
216 | endif | ||
217 | |||
218 | export KBUILD_MODULES KBUILD_BUILTIN | ||
219 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD | ||
220 | |||
221 | # Beautify output | ||
222 | # --------------------------------------------------------------------------- | ||
223 | # | ||
224 | # Normally, we echo the whole command before executing it. By making | ||
225 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | ||
226 | # $(quiet) to choose other forms of output instead, e.g. | ||
227 | # | ||
228 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | ||
229 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | ||
230 | # | ||
231 | # If $(quiet) is empty, the whole command will be printed. | ||
232 | # If it is set to "quiet_", only the short version will be printed. | ||
233 | # If it is set to "silent_", nothing wil be printed at all, since | ||
234 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | ||
235 | # | ||
236 | # A simple variant is to prefix commands with $(Q) - that's useful | ||
237 | # for commands that shall be hidden in non-verbose mode. | ||
238 | # | ||
239 | # $(Q)ln $@ :< | ||
240 | # | ||
241 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | ||
242 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | ||
243 | |||
244 | ifeq ($(KBUILD_VERBOSE),1) | ||
245 | quiet = | ||
246 | Q = | ||
247 | else | ||
248 | quiet=quiet_ | ||
249 | Q = @ | ||
250 | endif | ||
251 | |||
252 | # If the user is running make -s (silent mode), suppress echoing of | ||
253 | # commands | ||
254 | |||
255 | ifneq ($(findstring s,$(MAKEFLAGS)),) | ||
256 | quiet=silent_ | ||
257 | endif | ||
258 | |||
259 | export quiet Q KBUILD_VERBOSE | ||
260 | |||
261 | |||
262 | # Look for make include files relative to root of kernel src | ||
263 | MAKEFLAGS += --include-dir=$(srctree) | ||
264 | |||
265 | # We need some generic definitions | ||
266 | include $(srctree)/scripts/Kbuild.include | ||
267 | |||
268 | # For maximum performance (+ possibly random breakage, uncomment | ||
269 | # the following) | ||
270 | |||
271 | MAKEFLAGS += -rR | ||
272 | |||
273 | # Make variables (CC, etc...) | ||
274 | |||
275 | AS = $(CROSS_COMPILE)as | ||
276 | CC = $(CROSS_COMPILE)gcc | ||
277 | LD = $(CC) -nostdlib | ||
278 | CPP = $(CC) -E | ||
279 | AR = $(CROSS_COMPILE)ar | ||
280 | NM = $(CROSS_COMPILE)nm | ||
281 | STRIP = $(CROSS_COMPILE)strip | ||
282 | OBJCOPY = $(CROSS_COMPILE)objcopy | ||
283 | OBJDUMP = $(CROSS_COMPILE)objdump | ||
284 | AWK = awk | ||
285 | GENKSYMS = scripts/genksyms/genksyms | ||
286 | DEPMOD = /sbin/depmod | ||
287 | KALLSYMS = scripts/kallsyms | ||
288 | PERL = perl | ||
289 | CHECK = sparse | ||
290 | |||
291 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) | ||
292 | MODFLAGS = -DMODULE | ||
293 | CFLAGS_MODULE = $(MODFLAGS) | ||
294 | AFLAGS_MODULE = $(MODFLAGS) | ||
295 | LDFLAGS_MODULE = -r | ||
296 | CFLAGS_KERNEL = | ||
297 | AFLAGS_KERNEL = | ||
298 | |||
299 | |||
300 | # Use LINUXINCLUDE when you must reference the include/ directory. | ||
301 | # Needed to be compatible with the O= option | ||
302 | CFLAGS := | ||
303 | CPPFLAGS := | ||
304 | AFLAGS := | ||
305 | |||
306 | # Read KERNELRELEASE from .kernelrelease (if it exists) | ||
307 | KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) | ||
308 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) | ||
309 | |||
310 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ | ||
311 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ | ||
312 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ | ||
313 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | ||
314 | |||
315 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS | ||
316 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | ||
317 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | ||
318 | |||
319 | # When compiling out-of-tree modules, put MODVERDIR in the module | ||
320 | # tree rather than in the kernel tree. The kernel tree might | ||
321 | # even be read-only. | ||
322 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | ||
323 | |||
324 | # Files to ignore in find ... statements | ||
325 | |||
326 | 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 | ||
327 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git | ||
328 | |||
329 | # =========================================================================== | ||
330 | # Rules shared between *config targets and build targets | ||
331 | |||
332 | # Basic helpers built in scripts/ | ||
333 | PHONY += scripts_basic | ||
334 | scripts_basic: | ||
335 | $(Q)$(MAKE) $(build)=scripts/basic | ||
336 | |||
337 | # To avoid any implicit rule to kick in, define an empty command. | ||
338 | scripts/basic/%: scripts_basic ; | ||
339 | |||
340 | PHONY += outputmakefile | ||
341 | # outputmakefile generates a Makefile in the output directory, if using a | ||
342 | # separate output directory. This allows convenient use of make in the | ||
343 | # output directory. | ||
344 | outputmakefile: | ||
345 | ifneq ($(KBUILD_SRC),) | ||
346 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ | ||
347 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | ||
348 | endif | ||
349 | |||
350 | # To make sure we do not include .config for any of the *config targets | ||
351 | # catch them early, and hand them over to scripts/kconfig/Makefile | ||
352 | # It is allowed to specify more targets when calling make, including | ||
353 | # mixing *config targets and build targets. | ||
354 | # For example 'make oldconfig all'. | ||
355 | # Detect when mixed targets is specified, and make a second invocation | ||
356 | # of make so .config is not included in this case either (for *config). | ||
357 | |||
358 | no-dot-config-targets := clean mrproper distclean \ | ||
359 | cscope TAGS tags help %docs check% | ||
360 | |||
361 | config-targets := 0 | ||
362 | mixed-targets := 0 | ||
363 | dot-config := 1 | ||
364 | |||
365 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | ||
366 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | ||
367 | dot-config := 0 | ||
368 | endif | ||
369 | endif | ||
370 | |||
371 | ifeq ($(KBUILD_EXTMOD),) | ||
372 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | ||
373 | config-targets := 1 | ||
374 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) | ||
375 | mixed-targets := 1 | ||
376 | endif | ||
377 | endif | ||
378 | endif | ||
379 | |||
380 | ifeq ($(mixed-targets),1) | ||
381 | # =========================================================================== | ||
382 | # We're called with mixed targets (*config and build targets). | ||
383 | # Handle them one by one. | ||
384 | |||
385 | %:: FORCE | ||
386 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ | ||
387 | |||
388 | else | ||
389 | ifeq ($(config-targets),1) | ||
390 | # =========================================================================== | ||
391 | # *config targets only - make sure prerequisites are updated, and descend | ||
392 | # in scripts/kconfig to make the *config target | ||
393 | |||
394 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | ||
395 | # KBUILD_DEFCONFIG may point out an alternative default configuration | ||
396 | # used for 'make defconfig' | ||
397 | -include $(srctree)/arch/$(ARCH)/Makefile | ||
398 | export KBUILD_DEFCONFIG | ||
399 | |||
400 | config %config: scripts_basic outputmakefile FORCE | ||
401 | $(Q)mkdir -p include | ||
402 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | ||
403 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease | ||
404 | |||
405 | else | ||
406 | # =========================================================================== | ||
407 | # Build targets only - this includes busybox, arch specific targets, clean | ||
408 | # targets and others. In general all targets except *config targets. | ||
409 | |||
410 | ifeq ($(KBUILD_EXTMOD),) | ||
411 | # Additional helpers built in scripts/ | ||
412 | # Carefully list dependencies so we do not try to build scripts twice | ||
413 | # in parrallel | ||
414 | PHONY += scripts | ||
415 | scripts: scripts_basic include/config/MARKER | ||
416 | $(Q)$(MAKE) $(build)=$(@) | ||
417 | |||
418 | scripts_basic: include/autoconf.h | ||
419 | |||
420 | # Objects we will link into busybox / subdirs we need to visit | ||
421 | core-y := \ | ||
422 | applets/ \ | ||
423 | |||
424 | libs-y := \ | ||
425 | archival/ \ | ||
426 | archival/libunarchive/ \ | ||
427 | console-tools/ \ | ||
428 | coreutils/ \ | ||
429 | coreutils/libcoreutils/ \ | ||
430 | debianutils/ \ | ||
431 | e2fsprogs/ \ | ||
432 | editors/ \ | ||
433 | findutils/ \ | ||
434 | init/ \ | ||
435 | libbb/ \ | ||
436 | libpwdgrp/ \ | ||
437 | loginutils/ \ | ||
438 | miscutils/ \ | ||
439 | modutils/ \ | ||
440 | networking/ \ | ||
441 | networking/libiproute/ \ | ||
442 | networking/udhcp/ \ | ||
443 | procps/ \ | ||
444 | runit/ \ | ||
445 | shell/ \ | ||
446 | sysklogd/ \ | ||
447 | util-linux/ \ | ||
448 | |||
449 | endif # KBUILD_EXTMOD | ||
450 | |||
451 | ifeq ($(dot-config),1) | ||
452 | # In this section, we need .config | ||
453 | |||
454 | # Read in dependencies to all Kconfig* files, make sure to run | ||
455 | # oldconfig if changes are detected. | ||
456 | -include .kconfig.d | ||
457 | |||
458 | -include .config | ||
459 | |||
460 | # If .config needs to be updated, it will be done via the dependency | ||
461 | # that autoconf has on .config. | ||
462 | # To avoid any implicit rule to kick in, define an empty command | ||
463 | .config .kconfig.d: ; | ||
464 | |||
465 | # Now we can define CFLAGS etc according to .config | ||
466 | include $(srctree)/Makefile.flags | ||
467 | |||
468 | # If .config is newer than include/autoconf.h, someone tinkered | ||
469 | # with it and forgot to run make oldconfig. | ||
470 | # If kconfig.d is missing then we are probarly in a cleaned tree so | ||
471 | # we execute the config step to be sure to catch updated Kconfig files | ||
472 | include/autoconf.h: .kconfig.d .config | ||
473 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig | ||
474 | |||
475 | else | ||
476 | # Dummy target needed, because used as prerequisite | ||
477 | include/autoconf.h: ; | ||
478 | endif | ||
479 | |||
480 | # The all: target is the default when no target is given on the | ||
481 | # command line. | ||
482 | # This allow a user to issue only 'make' to build a kernel including modules | ||
483 | # Defaults busybox but it is usually overriden in the arch makefile | ||
484 | all: busybox | ||
485 | |||
486 | -include $(srctree)/arch/$(ARCH)/Makefile | ||
487 | |||
488 | # arch Makefile may override CC so keep this after arch Makefile is included | ||
489 | #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | ||
490 | CHECKFLAGS += $(NOSTDINC_FLAGS) | ||
491 | |||
492 | # warn about C99 declaration after statement | ||
493 | CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) | ||
494 | |||
495 | # disable pointer signedness warnings in gcc 4.0 | ||
496 | CFLAGS += $(call cc-option,-Wno-pointer-sign,) | ||
497 | |||
498 | # Default kernel image to build when no specific target is given. | ||
499 | # KBUILD_IMAGE may be overruled on the commandline or | ||
500 | # set in the environment | ||
501 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | ||
502 | # this default value | ||
503 | export KBUILD_IMAGE ?= busybox | ||
504 | |||
505 | # | ||
506 | # INSTALL_PATH specifies where to place the updated kernel and system map | ||
507 | # images. Default is /boot, but you can set it to other values | ||
508 | export INSTALL_PATH ?= /boot | ||
509 | |||
510 | # | ||
511 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | ||
512 | # relocations required by build roots. This is not defined in the | ||
513 | # makefile but the arguement can be passed to make if needed. | ||
514 | # | ||
515 | |||
516 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | ||
517 | export MODLIB | ||
518 | |||
519 | |||
520 | ifeq ($(KBUILD_EXTMOD),) | ||
521 | busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) | ||
522 | |||
523 | busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ | ||
524 | $(core-n) $(core-) $(libs-n) $(libs-) \ | ||
525 | ))) | ||
526 | |||
527 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | ||
528 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | ||
529 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | ||
530 | libs-y := $(libs-y1) $(libs-y2) | ||
531 | |||
532 | # Build busybox | ||
533 | # --------------------------------------------------------------------------- | ||
534 | # busybox is build from the objects selected by $(busybox-init) and | ||
535 | # $(busybox-main). Most are built-in.o files from top-level directories | ||
536 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile. | ||
537 | # Ordering when linking is important, and $(busybox-init) must be first. | ||
538 | # | ||
539 | # busybox | ||
540 | # ^ | ||
541 | # | | ||
542 | # +-< $(busybox-init) | ||
543 | # | +--< init/version.o + more | ||
544 | # | | ||
545 | # +--< $(busybox-main) | ||
546 | # | +--< driver/built-in.o mm/built-in.o + more | ||
547 | # | | ||
548 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) | ||
549 | # | ||
550 | # busybox version (uname -v) cannot be updated during normal | ||
551 | # descending-into-subdirs phase since we do not yet know if we need to | ||
552 | # update busybox. | ||
553 | # Therefore this step is delayed until just before final link of busybox - | ||
554 | # except in the kallsyms case where it is done just before adding the | ||
555 | # symbols to the kernel. | ||
556 | # | ||
557 | # System.map is generated to document addresses of all kernel symbols | ||
558 | |||
559 | busybox-all := $(core-y) $(libs-y) | ||
560 | |||
561 | # Rule to link busybox - also used during CONFIG_KALLSYMS | ||
562 | # May be overridden by arch/$(ARCH)/Makefile | ||
563 | quiet_cmd_busybox__ ?= LINK $@ | ||
564 | cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \ | ||
565 | -o $@ \ | ||
566 | -Wl,--warn-common -Wl,--sort-common \ | ||
567 | -Wl,--start-group $(busybox-all) -Wl,--end-group | ||
568 | |||
569 | # Generate System.map | ||
570 | quiet_cmd_sysmap = SYSMAP | ||
571 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap | ||
572 | |||
573 | # Link of busybox | ||
574 | # If CONFIG_KALLSYMS is set .version is already updated | ||
575 | # Generate System.map and verify that the content is consistent | ||
576 | # Use + in front of the busybox_version rule to silent warning with make -j2 | ||
577 | # First command is ':' to allow us to use + in front of the rule | ||
578 | define rule_busybox__ | ||
579 | : | ||
580 | $(call cmd,busybox__) | ||
581 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd | ||
582 | endef | ||
583 | |||
584 | |||
585 | ifdef CONFIG_KALLSYMS | ||
586 | # Generate section listing all symbols and add it into busybox $(kallsyms.o) | ||
587 | # It's a three stage process: | ||
588 | # o .tmp_busybox1 has all symbols and sections, but __kallsyms is | ||
589 | # empty | ||
590 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | ||
591 | # the right size - busybox version (uname -v) is updated during this step | ||
592 | # o .tmp_busybox2 now has a __kallsyms section of the right size, | ||
593 | # but due to the added section, some addresses have shifted. | ||
594 | # From here, we generate a correct .tmp_kallsyms2.o | ||
595 | # o The correct .tmp_kallsyms2.o is linked into the final busybox. | ||
596 | # o Verify that the System.map from busybox matches the map from | ||
597 | # .tmp_busybox2, just in case we did not generate kallsyms correctly. | ||
598 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using | ||
599 | # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a | ||
600 | # temporary bypass to allow the kernel to be built while the | ||
601 | # maintainers work out what went wrong with kallsyms. | ||
602 | |||
603 | ifdef CONFIG_KALLSYMS_EXTRA_PASS | ||
604 | last_kallsyms := 3 | ||
605 | else | ||
606 | last_kallsyms := 2 | ||
607 | endif | ||
608 | |||
609 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o | ||
610 | |||
611 | define verify_kallsyms | ||
612 | $(Q)$(if $($(quiet)cmd_sysmap), \ | ||
613 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ | ||
614 | $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map | ||
615 | $(Q)cmp -s System.map .tmp_System.map || \ | ||
616 | (echo Inconsistent kallsyms data; \ | ||
617 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ | ||
618 | rm .tmp_kallsyms* ; /bin/false ) | ||
619 | endef | ||
620 | |||
621 | # Update busybox version before link | ||
622 | # Use + in front of this rule to silent warning about make -j1 | ||
623 | # First command is ':' to allow us to use + in front of this rule | ||
624 | cmd_ksym_ld = $(cmd_busybox__) | ||
625 | define rule_ksym_ld | ||
626 | : | ||
627 | +$(call cmd,busybox_version) | ||
628 | $(call cmd,busybox__) | ||
629 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd | ||
630 | endef | ||
631 | |||
632 | # Generate .S file with all kernel symbols | ||
633 | quiet_cmd_kallsyms = KSYM $@ | ||
634 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ | ||
635 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ | ||
636 | |||
637 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE | ||
638 | $(call if_changed_dep,as_o_S) | ||
639 | |||
640 | .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) | ||
641 | $(call cmd,kallsyms) | ||
642 | |||
643 | # .tmp_busybox1 must be complete except kallsyms, so update busybox version | ||
644 | .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE | ||
645 | $(call if_changed_rule,ksym_ld) | ||
646 | |||
647 | .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE | ||
648 | $(call if_changed,busybox__) | ||
649 | |||
650 | .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE | ||
651 | $(call if_changed,busybox__) | ||
652 | |||
653 | # Needs to visit scripts/ before $(KALLSYMS) can be used. | ||
654 | $(KALLSYMS): scripts ; | ||
655 | |||
656 | # Generate some data for debugging strange kallsyms problems | ||
657 | debug_kallsyms: .tmp_map$(last_kallsyms) | ||
658 | |||
659 | .tmp_map%: .tmp_busybox% FORCE | ||
660 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ | ||
661 | |||
662 | .tmp_map3: .tmp_map2 | ||
663 | |||
664 | .tmp_map2: .tmp_map1 | ||
665 | |||
666 | endif # ifdef CONFIG_KALLSYMS | ||
667 | |||
668 | # busybox image - including updated kernel symbols | ||
669 | busybox_unstripped: $(busybox-all) FORCE | ||
670 | $(call if_changed_rule,busybox__) | ||
671 | $(Q)rm -f .old_version | ||
672 | |||
673 | busybox: busybox_unstripped | ||
674 | $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \ | ||
675 | busybox_unstripped -o $@ | ||
676 | |||
677 | # The actual objects are generated when descending, | ||
678 | # make sure no implicit rule kicks in | ||
679 | $(sort $(busybox-all)): $(busybox-dirs) ; | ||
680 | |||
681 | # Handle descending into subdirectories listed in $(busybox-dirs) | ||
682 | # Preset locale variables to speed up the build process. Limit locale | ||
683 | # tweaks to this spot to avoid wrong language settings when running | ||
684 | # make menuconfig etc. | ||
685 | # Error messages still appears in the original language | ||
686 | |||
687 | PHONY += $(busybox-dirs) | ||
688 | $(busybox-dirs): prepare scripts | ||
689 | $(Q)$(MAKE) $(build)=$@ | ||
690 | |||
691 | # Build the kernel release string | ||
692 | # The KERNELRELEASE is stored in a file named .kernelrelease | ||
693 | # to be used when executing for example make install or make modules_install | ||
694 | # | ||
695 | # Take the contents of any files called localversion* and the config | ||
696 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. | ||
697 | # LOCALVERSION from the command line override all of this | ||
698 | |||
699 | nullstring := | ||
700 | space := $(nullstring) # end of line | ||
701 | |||
702 | ___localver = $(objtree)/localversion* $(srctree)/localversion* | ||
703 | __localver = $(sort $(wildcard $(___localver))) | ||
704 | # skip backup files (containing '~') | ||
705 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) | ||
706 | |||
707 | localver = $(subst $(space),, \ | ||
708 | $(shell cat /dev/null $(_localver)) \ | ||
709 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) | ||
710 | |||
711 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called | ||
712 | # and if the SCM is know a tag from the SCM is appended. | ||
713 | # The appended tag is determinded by the SCM used. | ||
714 | # | ||
715 | # Currently, only git is supported. | ||
716 | # Other SCMs can edit scripts/setlocalversion and add the appropriate | ||
717 | # checks as needed. | ||
718 | ifdef CONFIG_LOCALVERSION_AUTO | ||
719 | _localver-auto = $(shell $(CONFIG_SHELL) \ | ||
720 | $(srctree)/scripts/setlocalversion $(srctree)) | ||
721 | localver-auto = $(LOCALVERSION)$(_localver-auto) | ||
722 | endif | ||
723 | |||
724 | localver-full = $(localver)$(localver-auto) | ||
725 | |||
726 | # Store (new) KERNELRELASE string in .kernelrelease | ||
727 | kernelrelease = $(KERNELVERSION)$(localver-full) | ||
728 | .kernelrelease: FORCE | ||
729 | $(Q)rm -f $@ | ||
730 | $(Q)echo $(kernelrelease) > $@ | ||
731 | |||
732 | |||
733 | # Things we need to do before we recursively start building the kernel | ||
734 | # or the modules are listed in "prepare". | ||
735 | # A multi level approach is used. prepareN is processed before prepareN-1. | ||
736 | # archprepare is used in arch Makefiles and when processed asm symlink, | ||
737 | # version.h and scripts_basic is processed / created. | ||
738 | |||
739 | # Listed in dependency order | ||
740 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 | ||
741 | |||
742 | # prepare-all is deprecated, use prepare as valid replacement | ||
743 | PHONY += prepare-all | ||
744 | |||
745 | # prepare3 is used to check if we are building in a separate output directory, | ||
746 | # and if so do: | ||
747 | # 1) Check that make has not been executed in the kernel src $(srctree) | ||
748 | # 2) Create the include2 directory, used for the second asm symlink | ||
749 | prepare3: .kernelrelease | ||
750 | ifneq ($(KBUILD_SRC),) | ||
751 | @echo ' Using $(srctree) as source for kernel' | ||
752 | $(Q)if [ -f $(srctree)/.config ]; then \ | ||
753 | echo " $(srctree) is not clean, please run 'make mrproper'";\ | ||
754 | echo " in the '$(srctree)' directory.";\ | ||
755 | /bin/false; \ | ||
756 | fi; | ||
757 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; | ||
758 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm | ||
759 | endif | ||
760 | |||
761 | # prepare2 creates a makefile if using a separate output directory | ||
762 | prepare2: prepare3 outputmakefile | ||
763 | |||
764 | prepare1: prepare2 include/config/MARKER | ||
765 | ifneq ($(KBUILD_MODULES),) | ||
766 | $(Q)mkdir -p $(MODVERDIR) | ||
767 | $(Q)rm -f $(MODVERDIR)/* | ||
768 | endif | ||
769 | |||
770 | archprepare: prepare1 scripts_basic | ||
771 | |||
772 | prepare0: archprepare FORCE | ||
773 | $(Q)$(MAKE) $(build)=. | ||
774 | |||
775 | # All the preparing.. | ||
776 | prepare prepare-all: prepare0 | ||
777 | |||
778 | # Leave this as default for preprocessing busybox.lds.S, which is now | ||
779 | # done in arch/$(ARCH)/kernel/Makefile | ||
780 | |||
781 | export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) | ||
782 | |||
783 | # FIXME: The asm symlink changes when $(ARCH) changes. That's | ||
784 | # hard to detect, but I suppose "make mrproper" is a good idea | ||
785 | # before switching between archs anyway. | ||
786 | |||
787 | #bbox# include/asm: | ||
788 | #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' | ||
789 | #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; | ||
790 | #bbox# @ln -fsn asm-$(ARCH) $@ | ||
791 | |||
792 | # Split autoconf.h into include/linux/config/* | ||
793 | quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h | ||
794 | cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs > include/bbconfigopts.h | ||
795 | quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/* | ||
796 | cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config | ||
797 | #bbox# piggybacked generation of few .h files | ||
798 | include/config/MARKER: scripts/basic/split-include include/autoconf.h | ||
799 | $(call cmd,split_autoconf) | ||
800 | $(call cmd,gen_bbconfigopts) | ||
801 | @touch $@ | ||
802 | |||
803 | # Generate some files | ||
804 | # --------------------------------------------------------------------------- | ||
805 | |||
806 | # KERNELRELEASE can change from a few different places, meaning version.h | ||
807 | # needs to be updated, so this check is forced on all builds | ||
808 | |||
809 | uts_len := 64 | ||
810 | |||
811 | define filechk_version.h | ||
812 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | ||
813 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | ||
814 | exit 1; \ | ||
815 | fi; \ | ||
816 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ | ||
817 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ | ||
818 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ | ||
819 | ) | ||
820 | endef | ||
821 | |||
822 | # --------------------------------------------------------------------------- | ||
823 | |||
824 | PHONY += depend dep | ||
825 | depend dep: | ||
826 | @echo '*** Warning: make $@ is unnecessary now.' | ||
827 | |||
828 | # --------------------------------------------------------------------------- | ||
829 | # Modules | ||
830 | |||
831 | ifdef CONFIG_MODULES | ||
832 | |||
833 | # By default, build modules as well | ||
834 | |||
835 | all: modules | ||
836 | |||
837 | # Build modules | ||
838 | |||
839 | PHONY += modules | ||
840 | modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) | ||
841 | @echo ' Building modules, stage 2.'; | ||
842 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | ||
843 | |||
844 | |||
845 | # Target to prepare building external modules | ||
846 | PHONY += modules_prepare | ||
847 | modules_prepare: prepare scripts | ||
848 | |||
849 | # Target to install modules | ||
850 | PHONY += modules_install | ||
851 | modules_install: _modinst_ _modinst_post | ||
852 | |||
853 | PHONY += _modinst_ | ||
854 | _modinst_: | ||
855 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ | ||
856 | echo "Warning: you may need to install module-init-tools"; \ | ||
857 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ | ||
858 | sleep 1; \ | ||
859 | fi | ||
860 | @rm -rf $(MODLIB)/kernel | ||
861 | @rm -f $(MODLIB)/source | ||
862 | @mkdir -p $(MODLIB)/kernel | ||
863 | @ln -s $(srctree) $(MODLIB)/source | ||
864 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | ||
865 | rm -f $(MODLIB)/build ; \ | ||
866 | ln -s $(objtree) $(MODLIB)/build ; \ | ||
867 | fi | ||
868 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst | ||
869 | |||
870 | # If System.map exists, run depmod. This deliberately does not have a | ||
871 | # dependency on System.map since that would run the dependency tree on | ||
872 | # busybox. This depmod is only for convenience to give the initial | ||
873 | # boot a modules.dep even before / is mounted read-write. However the | ||
874 | # boot script depmod is the master version. | ||
875 | ifeq "$(strip $(INSTALL_MOD_PATH))" "" | ||
876 | depmod_opts := | ||
877 | else | ||
878 | depmod_opts := -b $(INSTALL_MOD_PATH) -r | ||
879 | endif | ||
880 | PHONY += _modinst_post | ||
881 | _modinst_post: _modinst_ | ||
882 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi | ||
883 | |||
884 | else # CONFIG_MODULES | ||
885 | |||
886 | # Modules not configured | ||
887 | # --------------------------------------------------------------------------- | ||
888 | |||
889 | modules modules_install: FORCE | ||
890 | @echo | ||
891 | @echo "The present busybox configuration has modules disabled." | ||
892 | @echo "Type 'make config' and enable loadable module support." | ||
893 | @echo "Then build a kernel with module support enabled." | ||
894 | @echo | ||
895 | @exit 1 | ||
896 | |||
897 | endif # CONFIG_MODULES | ||
898 | |||
899 | ### | ||
900 | # Cleaning is done on three levels. | ||
901 | # make clean Delete most generated files | ||
902 | # Leave enough to build external modules | ||
903 | # make mrproper Delete the current configuration, and all generated files | ||
904 | # make distclean Remove editor backup files, patch leftover files and the like | ||
905 | |||
906 | # Directories & files removed with 'make clean' | ||
907 | CLEAN_DIRS += $(MODVERDIR) | ||
908 | CLEAN_FILES += busybox* System.map \ | ||
909 | .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map | ||
910 | |||
911 | # Directories & files removed with 'make mrproper' | ||
912 | MRPROPER_DIRS += include/config include2 | ||
913 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ | ||
914 | include/autoconf.h \ | ||
915 | include/bbconfigopts.h \ | ||
916 | include/usage_compressed.h \ | ||
917 | .kernelrelease Module.symvers tags TAGS cscope* | ||
918 | |||
919 | # clean - Delete most, but leave enough to build external modules | ||
920 | # | ||
921 | clean: rm-dirs := $(CLEAN_DIRS) | ||
922 | clean: rm-files := $(CLEAN_FILES) | ||
923 | clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs)) | ||
924 | |||
925 | PHONY += $(clean-dirs) clean archclean | ||
926 | $(clean-dirs): | ||
927 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | ||
928 | |||
929 | clean: archclean $(clean-dirs) | ||
930 | $(call cmd,rmdirs) | ||
931 | $(call cmd,rmfiles) | ||
932 | @find . $(RCS_FIND_IGNORE) \ | ||
933 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | ||
934 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ | ||
935 | -type f -print | xargs rm -f | ||
936 | |||
937 | # mrproper - Delete all generated files, including .config | ||
938 | # | ||
939 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | ||
940 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | ||
941 | mrproper-dirs := $(addprefix _mrproper_,scripts) | ||
942 | |||
943 | PHONY += $(mrproper-dirs) mrproper archmrproper | ||
944 | $(mrproper-dirs): | ||
945 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | ||
946 | |||
947 | mrproper: clean archmrproper $(mrproper-dirs) | ||
948 | $(call cmd,rmdirs) | ||
949 | $(call cmd,rmfiles) | ||
950 | |||
951 | # distclean | ||
952 | # | ||
953 | PHONY += distclean | ||
954 | |||
955 | distclean: mrproper | ||
956 | @find $(srctree) $(RCS_FIND_IGNORE) \ | ||
957 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | ||
958 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ | ||
959 | -o -name '.*.rej' -o -size 0 \ | ||
960 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ | ||
961 | -type f -print | xargs rm -f | ||
962 | |||
963 | |||
964 | # Packaging of the kernel to various formats | ||
965 | # --------------------------------------------------------------------------- | ||
966 | # rpm target kept for backward compatibility | ||
967 | package-dir := $(srctree)/scripts/package | ||
968 | |||
969 | %pkg: FORCE | ||
970 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | ||
971 | rpm: FORCE | ||
972 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | ||
973 | |||
974 | |||
975 | # Brief documentation of the typical targets used | ||
976 | # --------------------------------------------------------------------------- | ||
977 | |||
978 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) | ||
979 | boards := $(notdir $(boards)) | ||
980 | |||
981 | -include $(srctree)/Makefile.help | ||
982 | |||
983 | # Documentation targets | ||
984 | # --------------------------------------------------------------------------- | ||
985 | %docs: scripts_basic FORCE | ||
986 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | ||
987 | |||
988 | else # KBUILD_EXTMOD | ||
989 | |||
990 | ### | ||
991 | # External module support. | ||
992 | # When building external modules the kernel used as basis is considered | ||
993 | # read-only, and no consistency checks are made and the make | ||
994 | # system is not used on the basis kernel. If updates are required | ||
995 | # in the basis kernel ordinary make commands (without M=...) must | ||
996 | # be used. | ||
997 | # | ||
998 | # The following are the only valid targets when building external | ||
999 | # modules. | ||
1000 | # make M=dir clean Delete all automatically generated files | ||
1001 | # make M=dir modules Make all modules in specified dir | ||
1002 | # make M=dir Same as 'make M=dir modules' | ||
1003 | # make M=dir modules_install | ||
1004 | # Install the modules build in the module directory | ||
1005 | # Assumes install directory is already created | ||
1006 | |||
1007 | # We are always building modules | ||
1008 | KBUILD_MODULES := 1 | ||
1009 | PHONY += crmodverdir | ||
1010 | crmodverdir: | ||
1011 | $(Q)mkdir -p $(MODVERDIR) | ||
1012 | $(Q)rm -f $(MODVERDIR)/* | ||
1013 | |||
1014 | PHONY += $(objtree)/Module.symvers | ||
1015 | $(objtree)/Module.symvers: | ||
1016 | @test -e $(objtree)/Module.symvers || ( \ | ||
1017 | echo; \ | ||
1018 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | ||
1019 | echo " is missing; modules will have no dependencies and modversions."; \ | ||
1020 | echo ) | ||
1021 | |||
1022 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | ||
1023 | PHONY += $(module-dirs) modules | ||
1024 | $(module-dirs): crmodverdir $(objtree)/Module.symvers | ||
1025 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | ||
1026 | |||
1027 | modules: $(module-dirs) | ||
1028 | @echo ' Building modules, stage 2.'; | ||
1029 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | ||
1030 | |||
1031 | PHONY += modules_install | ||
1032 | modules_install: _emodinst_ _emodinst_post | ||
1033 | |||
1034 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) | ||
1035 | PHONY += _emodinst_ | ||
1036 | _emodinst_: | ||
1037 | $(Q)mkdir -p $(MODLIB)/$(install-dir) | ||
1038 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst | ||
1039 | |||
1040 | # Run depmod only is we have System.map and depmod is executable | ||
1041 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | ||
1042 | cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ | ||
1043 | $(DEPMOD) -ae -F System.map \ | ||
1044 | $(if $(strip $(INSTALL_MOD_PATH)), \ | ||
1045 | -b $(INSTALL_MOD_PATH) -r) \ | ||
1046 | $(KERNELRELEASE); \ | ||
1047 | fi | ||
1048 | |||
1049 | PHONY += _emodinst_post | ||
1050 | _emodinst_post: _emodinst_ | ||
1051 | $(call cmd,depmod) | ||
1052 | |||
1053 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) | ||
1054 | |||
1055 | PHONY += $(clean-dirs) clean | ||
1056 | $(clean-dirs): | ||
1057 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | ||
1058 | |||
1059 | clean: rm-dirs := $(MODVERDIR) | ||
1060 | clean: $(clean-dirs) | ||
1061 | $(call cmd,rmdirs) | ||
1062 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ | ||
1063 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | ||
1064 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ | ||
1065 | -type f -print | xargs rm -f | ||
1066 | |||
1067 | help: | ||
1068 | @echo ' Building external modules.' | ||
1069 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | ||
1070 | @echo '' | ||
1071 | @echo ' modules - default target, build the module(s)' | ||
1072 | @echo ' modules_install - install the module' | ||
1073 | @echo ' clean - remove generated files in module directory only' | ||
1074 | @echo '' | ||
1075 | |||
1076 | # Dummies... | ||
1077 | PHONY += prepare scripts | ||
1078 | prepare: ; | ||
1079 | scripts: ; | ||
1080 | endif # KBUILD_EXTMOD | ||
1081 | |||
1082 | # Generate tags for editors | ||
1083 | # --------------------------------------------------------------------------- | ||
1084 | |||
1085 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set | ||
1086 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. | ||
1087 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! | ||
1088 | |||
1089 | ifeq ($(src),$(obj)) | ||
1090 | __srctree = | ||
1091 | else | ||
1092 | __srctree = $(srctree)/ | ||
1093 | endif | ||
1094 | |||
1095 | ifeq ($(ALLSOURCE_ARCHS),) | ||
1096 | ifeq ($(ARCH),um) | ||
1097 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) | ||
1098 | else | ||
1099 | ALLINCLUDE_ARCHS := $(ARCH) | ||
1100 | endif | ||
1101 | else | ||
1102 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. | ||
1103 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) | ||
1104 | endif | ||
1105 | |||
1106 | ALLSOURCE_ARCHS := $(ARCH) | ||
1107 | |||
1108 | define all-sources | ||
1109 | ( find $(__srctree) $(RCS_FIND_IGNORE) \ | ||
1110 | \( -name include -o -name arch \) -prune -o \ | ||
1111 | -name '*.[chS]' -print; \ | ||
1112 | for ARCH in $(ALLSOURCE_ARCHS) ; do \ | ||
1113 | find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ | ||
1114 | -name '*.[chS]' -print; \ | ||
1115 | done ; \ | ||
1116 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ | ||
1117 | -name '*.[chS]' -print; \ | ||
1118 | find $(__srctree)include $(RCS_FIND_IGNORE) \ | ||
1119 | \( -name config -o -name 'asm-*' \) -prune \ | ||
1120 | -o -name '*.[chS]' -print; \ | ||
1121 | for ARCH in $(ALLINCLUDE_ARCHS) ; do \ | ||
1122 | find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ | ||
1123 | -name '*.[chS]' -print; \ | ||
1124 | done ; \ | ||
1125 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ | ||
1126 | -name '*.[chS]' -print ) | ||
1127 | endef | ||
1128 | |||
1129 | quiet_cmd_cscope-file = FILELST cscope.files | ||
1130 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files | ||
1131 | |||
1132 | quiet_cmd_cscope = MAKE cscope.out | ||
1133 | cmd_cscope = cscope -b | ||
1134 | |||
1135 | cscope: FORCE | ||
1136 | $(call cmd,cscope-file) | ||
1137 | $(call cmd,cscope) | ||
1138 | |||
1139 | quiet_cmd_TAGS = MAKE $@ | ||
1140 | define cmd_TAGS | ||
1141 | rm -f $@; \ | ||
1142 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ | ||
1143 | echo "-I __initdata,__exitdata,__acquires,__releases \ | ||
1144 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ | ||
1145 | --extra=+f --c-kinds=+px"`; \ | ||
1146 | $(all-sources) | xargs etags $$ETAGSF -a | ||
1147 | endef | ||
1148 | |||
1149 | TAGS: FORCE | ||
1150 | $(call cmd,TAGS) | ||
1151 | |||
1152 | |||
1153 | quiet_cmd_tags = MAKE $@ | ||
1154 | define cmd_tags | ||
1155 | rm -f $@; \ | ||
1156 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ | ||
1157 | echo "-I __initdata,__exitdata,__acquires,__releases \ | ||
1158 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ | ||
1159 | --extra=+f --c-kinds=+px"`; \ | ||
1160 | $(all-sources) | xargs ctags $$CTAGSF -a | ||
1161 | endef | ||
1162 | |||
1163 | tags: FORCE | ||
1164 | $(call cmd,tags) | ||
1165 | |||
1166 | |||
1167 | # Scripts to check various things for consistency | ||
1168 | # --------------------------------------------------------------------------- | ||
1169 | |||
1170 | includecheck: | ||
1171 | find * $(RCS_FIND_IGNORE) \ | ||
1172 | -name '*.[hcS]' -type f -print | sort \ | ||
1173 | | xargs $(PERL) -w scripts/checkincludes.pl | ||
1174 | |||
1175 | versioncheck: | ||
1176 | find * $(RCS_FIND_IGNORE) \ | ||
1177 | -name '*.[hcS]' -type f -print | sort \ | ||
1178 | | xargs $(PERL) -w scripts/checkversion.pl | ||
1179 | |||
1180 | namespacecheck: | ||
1181 | $(PERL) $(srctree)/scripts/namespace.pl | ||
1182 | |||
1183 | endif #ifeq ($(config-targets),1) | ||
1184 | endif #ifeq ($(mixed-targets),1) | ||
1185 | |||
1186 | PHONY += checkstack | ||
1187 | checkstack: | ||
1188 | $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ | ||
1189 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH) | ||
1190 | |||
1191 | kernelrelease: | ||
1192 | $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ | ||
1193 | $(error kernelrelease not valid - run 'make *config' to update it)) | ||
1194 | kernelversion: | ||
1195 | @echo $(KERNELVERSION) | ||
1196 | |||
1197 | # Single targets | ||
1198 | # --------------------------------------------------------------------------- | ||
1199 | # Single targets are compatible with: | ||
1200 | # - build whith mixed source and output | ||
1201 | # - build with separate output dir 'make O=...' | ||
1202 | # - external modules | ||
1203 | # | ||
1204 | # target-dir => where to store outputfile | ||
1205 | # build-dir => directory in kernel source tree to use | ||
1206 | |||
1207 | ifeq ($(KBUILD_EXTMOD),) | ||
1208 | build-dir = $(patsubst %/,%,$(dir $@)) | ||
1209 | target-dir = $(dir $@) | ||
1210 | else | ||
1211 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | ||
1212 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | ||
1213 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | ||
1214 | endif | ||
1215 | |||
1216 | %.s: %.c prepare scripts FORCE | ||
1217 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
1218 | %.i: %.c prepare scripts FORCE | ||
1219 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
1220 | %.o: %.c prepare scripts FORCE | ||
1221 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
1222 | %.lst: %.c prepare scripts FORCE | ||
1223 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
1224 | %.s: %.S prepare scripts FORCE | ||
1225 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
1226 | %.o: %.S prepare scripts FORCE | ||
1227 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | ||
1228 | |||
1229 | # Modules | ||
1230 | / %/: prepare scripts FORCE | ||
1231 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | ||
1232 | $(build)=$(build-dir) | ||
1233 | %.ko: prepare scripts FORCE | ||
1234 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | ||
1235 | $(build)=$(build-dir) $(@:.ko=.o) | ||
1236 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | ||
1237 | |||
1238 | # FIXME Should go into a make.lib or something | ||
1239 | # =========================================================================== | ||
1240 | |||
1241 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | ||
1242 | cmd_rmdirs = rm -rf $(rm-dirs) | ||
1243 | |||
1244 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | ||
1245 | cmd_rmfiles = rm -f $(rm-files) | ||
1246 | |||
1247 | |||
1248 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ | ||
1249 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \ | ||
1250 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) | ||
1251 | |||
1252 | quiet_cmd_as_o_S = AS $@ | ||
1253 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | ||
1254 | |||
1255 | # read all saved command lines | ||
1256 | |||
1257 | targets := $(wildcard $(sort $(targets))) | ||
1258 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | ||
1259 | |||
1260 | ifneq ($(cmd_files),) | ||
1261 | $(cmd_files): ; # Do not try to update included dependency files | ||
1262 | include $(cmd_files) | ||
1263 | endif | ||
1264 | |||
1265 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir | ||
1266 | # Usage: | ||
1267 | # $(Q)$(MAKE) $(clean)=dir | ||
1268 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj | ||
1269 | |||
1270 | endif # skip-makefile | ||
1271 | |||
1272 | PHONY += FORCE | ||
1273 | FORCE: | ||
1274 | |||
1275 | -include $(srctree)/Makefile.custom | ||
1276 | |||
1277 | # Declare the contents of the .PHONY variable as phony. We keep that | ||
1278 | # information in a variable se we can use it in if_changed and friends. | ||
1279 | .PHONY: $(PHONY) |