blob: 23518ac33296f079290d3d62c7dccaab380d75e7
1 | VERSION = 1 |
2 | PATCHLEVEL = 26 |
3 | SUBLEVEL = 0 |
4 | EXTRAVERSION = |
5 | NAME = Unnamed |
6 | |
7 | # *DOCUMENTATION* |
8 | # To see a list of typical targets execute "make help" |
9 | # More info can be located in ./README |
10 | # Comments in this file are targeted only to the developer, do not |
11 | # expect to learn how to build the kernel reading this file. |
12 | |
13 | # Do not print "Entering directory ..." |
14 | MAKEFLAGS += --no-print-directory |
15 | |
16 | # We are using a recursive build, so we need to do a little thinking |
17 | # to get the ordering right. |
18 | # |
19 | # Most importantly: sub-Makefiles should only ever modify files in |
20 | # their own directory. If in some directory we have a dependency on |
21 | # a file in another dir (which doesn't happen often, but it's often |
22 | # unavoidable when linking the built-in.o targets which finally |
23 | # turn into busybox), we will call a sub make in that other dir, and |
24 | # after that we are sure that everything which is in that other dir |
25 | # is now up to date. |
26 | # |
27 | # The only cases where we need to modify files which have global |
28 | # effects are thus separated out and done before the recursive |
29 | # descending is started. They are now explicitly listed as the |
30 | # prepare rule. |
31 | |
32 | # To put more focus on warnings, be less verbose as default |
33 | # Use 'make V=1' to see the full commands |
34 | |
35 | ifdef V |
36 | ifeq ("$(origin V)", "command line") |
37 | KBUILD_VERBOSE = $(V) |
38 | endif |
39 | endif |
40 | ifndef KBUILD_VERBOSE |
41 | KBUILD_VERBOSE = 0 |
42 | endif |
43 | |
44 | # Call sparse as part of compilation of C files |
45 | # Use 'make C=1' to enable sparse checking |
46 | |
47 | ifdef C |
48 | ifeq ("$(origin C)", "command line") |
49 | KBUILD_CHECKSRC = $(C) |
50 | endif |
51 | endif |
52 | ifndef KBUILD_CHECKSRC |
53 | KBUILD_CHECKSRC = 0 |
54 | endif |
55 | |
56 | # Use make M=dir to specify directory of external module to build |
57 | # Old syntax make ... SUBDIRS=$PWD is still supported |
58 | # Setting the environment variable KBUILD_EXTMOD take precedence |
59 | ifdef SUBDIRS |
60 | KBUILD_EXTMOD ?= $(SUBDIRS) |
61 | endif |
62 | ifdef M |
63 | ifeq ("$(origin M)", "command line") |
64 | KBUILD_EXTMOD := $(M) |
65 | endif |
66 | endif |
67 | |
68 | |
69 | # kbuild supports saving output files in a separate directory. |
70 | # To locate output files in a separate directory two syntaxes are supported. |
71 | # In both cases the working directory must be the root of the kernel src. |
72 | # 1) O= |
73 | # Use "make O=dir/to/store/output/files/" |
74 | # |
75 | # 2) Set KBUILD_OUTPUT |
76 | # Set the environment variable KBUILD_OUTPUT to point to the directory |
77 | # where the output files shall be placed. |
78 | # export KBUILD_OUTPUT=dir/to/store/output/files/ |
79 | # make |
80 | # |
81 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment |
82 | # variable. |
83 | |
84 | |
85 | # KBUILD_SRC is set on invocation of make in OBJ directory |
86 | # KBUILD_SRC is not intended to be used by the regular user (for now) |
87 | ifeq ($(KBUILD_SRC),) |
88 | |
89 | # OK, Make called in directory where kernel src resides |
90 | # Do we want to locate output files in a separate directory? |
91 | ifdef O |
92 | ifeq ("$(origin O)", "command line") |
93 | KBUILD_OUTPUT := $(O) |
94 | endif |
95 | endif |
96 | |
97 | # That's our default target when none is given on the command line |
98 | PHONY := _all |
99 | _all: |
100 | |
101 | ifneq ($(KBUILD_OUTPUT),) |
102 | # Invoke a second make in the output directory, passing relevant variables |
103 | # check that the output directory actually exists |
104 | saved-output := $(KBUILD_OUTPUT) |
105 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) |
106 | $(if $(KBUILD_OUTPUT),, \ |
107 | $(error output directory "$(saved-output)" does not exist)) |
108 | |
109 | PHONY += $(MAKECMDGOALS) |
110 | |
111 | $(filter-out _all,$(MAKECMDGOALS)) _all: |
112 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ |
113 | KBUILD_SRC=$(CURDIR) \ |
114 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ |
115 | |
116 | # Leave processing to above invocation of make |
117 | skip-makefile := 1 |
118 | endif # ifneq ($(KBUILD_OUTPUT),) |
119 | endif # ifeq ($(KBUILD_SRC),) |
120 | |
121 | # We process the rest of the Makefile if this is the final invocation of make |
122 | ifeq ($(skip-makefile),) |
123 | |
124 | # If building an external module we do not care about the all: rule |
125 | # but instead _all depend on modules |
126 | PHONY += all |
127 | ifeq ($(KBUILD_EXTMOD),) |
128 | _all: all |
129 | else |
130 | _all: modules |
131 | endif |
132 | |
133 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) |
134 | TOPDIR := $(srctree) |
135 | # FIXME - TOPDIR is obsolete, use srctree/objtree |
136 | objtree := $(CURDIR) |
137 | src := $(srctree) |
138 | obj := $(objtree) |
139 | |
140 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
141 | |
142 | export srctree objtree VPATH TOPDIR |
143 | |
144 | |
145 | # Cross compiling and selecting different set of gcc/bin-utils |
146 | # --------------------------------------------------------------------------- |
147 | # |
148 | # When performing cross compilation for other architectures ARCH shall be set |
149 | # to the target architecture. (See arch/* for the possibilities). |
150 | # ARCH can be set during invocation of make: |
151 | # make ARCH=ia64 |
152 | # Another way is to have ARCH set in the environment. |
153 | # The default ARCH is the host where make is executed. |
154 | |
155 | # CROSS_COMPILE specify the prefix used for all executables used |
156 | # during compilation. Only gcc and related bin-utils executables |
157 | # are prefixed with $(CROSS_COMPILE). |
158 | # CROSS_COMPILE can be set on the command line |
159 | # make CROSS_COMPILE=ia64-linux- |
160 | # Alternatively CROSS_COMPILE can be set in the environment. |
161 | # Default value for CROSS_COMPILE is not to prefix executables |
162 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
163 | |
164 | CROSS_COMPILE ?= |
165 | # bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config, |
166 | # and it has not been included yet... thus using an awkward syntax. |
167 | ifeq ($(CROSS_COMPILE),) |
168 | CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null) |
169 | CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE)) |
170 | CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE)) |
171 | #") |
172 | endif |
173 | |
174 | # SUBARCH tells the usermode build what the underlying arch is. That is set |
175 | # first, and if a usermode build is happening, the "ARCH=um" on the command |
176 | # line overrides the setting of ARCH below. If a native build is happening, |
177 | # then ARCH is assigned, getting whatever value it gets normally, and |
178 | # SUBARCH is subsequently ignored. |
179 | |
180 | ifneq ($(CROSS_COMPILE),) |
181 | SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1) |
182 | else |
183 | SUBARCH := $(shell uname -m) |
184 | endif |
185 | SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ |
186 | -e s/arm.*/arm/ -e s/sa110/arm/ \ |
187 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
188 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) |
189 | |
190 | ARCH ?= $(SUBARCH) |
191 | |
192 | # Architecture as present in compile.h |
193 | UTS_MACHINE := $(ARCH) |
194 | |
195 | # SHELL used by kbuild |
196 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ |
197 | else if [ -x /bin/bash ]; then echo /bin/bash; \ |
198 | else echo sh; fi ; fi) |
199 | |
200 | # Decide whether to build built-in, modular, or both. |
201 | # Normally, just do built-in. |
202 | |
203 | KBUILD_MODULES := |
204 | KBUILD_BUILTIN := 1 |
205 | |
206 | # If we have only "make modules", don't compile built-in objects. |
207 | # When we're building modules with modversions, we need to consider |
208 | # the built-in objects during the descend as well, in order to |
209 | # make sure the checksums are uptodate before we record them. |
210 | |
211 | ifeq ($(MAKECMDGOALS),modules) |
212 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) |
213 | endif |
214 | |
215 | # If we have "make <whatever> modules", compile modules |
216 | # in addition to whatever we do anyway. |
217 | # Just "make" or "make all" shall build modules as well |
218 | |
219 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
220 | KBUILD_MODULES := 1 |
221 | endif |
222 | |
223 | ifeq ($(MAKECMDGOALS),) |
224 | KBUILD_MODULES := 1 |
225 | endif |
226 | |
227 | export KBUILD_MODULES KBUILD_BUILTIN |
228 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
229 | |
230 | # Beautify output |
231 | # --------------------------------------------------------------------------- |
232 | # |
233 | # Normally, we echo the whole command before executing it. By making |
234 | # that echo $($(quiet)$(cmd)), we now have the possibility to set |
235 | # $(quiet) to choose other forms of output instead, e.g. |
236 | # |
237 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
238 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
239 | # |
240 | # If $(quiet) is empty, the whole command will be printed. |
241 | # If it is set to "quiet_", only the short version will be printed. |
242 | # If it is set to "silent_", nothing wil be printed at all, since |
243 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
244 | # |
245 | # A simple variant is to prefix commands with $(Q) - that's useful |
246 | # for commands that shall be hidden in non-verbose mode. |
247 | # |
248 | # $(Q)ln $@ :< |
249 | # |
250 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
251 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
252 | |
253 | ifeq ($(KBUILD_VERBOSE),1) |
254 | quiet = |
255 | Q = |
256 | else |
257 | quiet=quiet_ |
258 | Q = @ |
259 | endif |
260 | |
261 | # If the user is running make -s (silent mode), suppress echoing of |
262 | # commands |
263 | |
264 | ifneq ($(findstring s,$(MAKEFLAGS)),) |
265 | quiet=silent_ |
266 | endif |
267 | |
268 | export quiet Q KBUILD_VERBOSE |
269 | |
270 | |
271 | # Look for make include files relative to root of kernel src |
272 | MAKEFLAGS += --include-dir=$(srctree) |
273 | |
274 | HOSTCC = gcc |
275 | HOSTCXX = g++ |
276 | HOSTCFLAGS := |
277 | HOSTCXXFLAGS := |
278 | # We need some generic definitions |
279 | include $(srctree)/scripts/Kbuild.include |
280 | |
281 | HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,) |
282 | HOSTCXXFLAGS += -O2 |
283 | |
284 | # For maximum performance (+ possibly random breakage, uncomment |
285 | # the following) |
286 | |
287 | MAKEFLAGS += -rR |
288 | |
289 | # Make variables (CC, etc...) |
290 | |
291 | AS = $(CROSS_COMPILE)as |
292 | CC = $(CROSS_COMPILE)gcc |
293 | LD = $(CC) -nostdlib |
294 | CPP = $(CC) -E |
295 | AR = $(CROSS_COMPILE)ar |
296 | NM = $(CROSS_COMPILE)nm |
297 | STRIP = $(CROSS_COMPILE)strip |
298 | OBJCOPY = $(CROSS_COMPILE)objcopy |
299 | OBJDUMP = $(CROSS_COMPILE)objdump |
300 | PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config |
301 | AWK = awk |
302 | GENKSYMS = scripts/genksyms/genksyms |
303 | DEPMOD = /sbin/depmod |
304 | KALLSYMS = scripts/kallsyms |
305 | PERL = perl |
306 | CHECK = sparse |
307 | |
308 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) |
309 | MODFLAGS = -DMODULE |
310 | CFLAGS_MODULE = $(MODFLAGS) |
311 | AFLAGS_MODULE = $(MODFLAGS) |
312 | LDFLAGS_MODULE = -r |
313 | CFLAGS_KERNEL = |
314 | AFLAGS_KERNEL = |
315 | |
316 | |
317 | # Use LINUXINCLUDE when you must reference the include/ directory. |
318 | # Needed to be compatible with the O= option |
319 | CFLAGS := $(CFLAGS) |
320 | # Added only to final link stage of busybox binary |
321 | CFLAGS_busybox := $(CFLAGS_busybox) |
322 | CPPFLAGS := $(CPPFLAGS) |
323 | AFLAGS := $(AFLAGS) |
324 | LDFLAGS := $(LDFLAGS) |
325 | LDLIBS := |
326 | |
327 | # Read KERNELRELEASE from .kernelrelease (if it exists) |
328 | KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) |
329 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
330 | |
331 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ |
332 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ |
333 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ |
334 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
335 | |
336 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
337 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
338 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
339 | export FLTFLAGS |
340 | |
341 | # When compiling out-of-tree modules, put MODVERDIR in the module |
342 | # tree rather than in the kernel tree. The kernel tree might |
343 | # even be read-only. |
344 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions |
345 | |
346 | # Files to ignore in find ... statements |
347 | |
348 | 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 |
349 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git |
350 | |
351 | # =========================================================================== |
352 | # Rules shared between *config targets and build targets |
353 | |
354 | # Basic helpers built in scripts/ |
355 | PHONY += scripts_basic |
356 | scripts_basic: |
357 | $(Q)$(MAKE) $(build)=scripts/basic |
358 | |
359 | # To avoid any implicit rule to kick in, define an empty command. |
360 | scripts/basic/%: scripts_basic ; |
361 | |
362 | # This target generates Kbuild's and Config.in's from *.c files |
363 | PHONY += gen_build_files |
364 | gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) |
365 | $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree) |
366 | |
367 | # bbox: we have helpers in applets/ |
368 | # we depend on scripts_basic, since scripts/basic/fixdep |
369 | # must be built before any other host prog |
370 | PHONY += applets_dir |
371 | applets_dir: scripts_basic gen_build_files |
372 | $(Q)$(MAKE) $(build)=applets |
373 | |
374 | applets/%: applets_dir ; |
375 | |
376 | PHONY += outputmakefile |
377 | # outputmakefile generates a Makefile in the output directory, if using a |
378 | # separate output directory. This allows convenient use of make in the |
379 | # output directory. |
380 | outputmakefile: |
381 | ifneq ($(KBUILD_SRC),) |
382 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
383 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) |
384 | endif |
385 | |
386 | # To make sure we do not include .config for any of the *config targets |
387 | # catch them early, and hand them over to scripts/kconfig/Makefile |
388 | # It is allowed to specify more targets when calling make, including |
389 | # mixing *config targets and build targets. |
390 | # For example 'make oldconfig all'. |
391 | # Detect when mixed targets is specified, and make a second invocation |
392 | # of make so .config is not included in this case either (for *config). |
393 | |
394 | no-dot-config-targets := clean mrproper distclean \ |
395 | cscope TAGS tags help %docs |
396 | #bbox# check% is removed from above |
397 | |
398 | config-targets := 0 |
399 | mixed-targets := 0 |
400 | dot-config := 1 |
401 | |
402 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
403 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
404 | dot-config := 0 |
405 | endif |
406 | endif |
407 | |
408 | ifeq ($(KBUILD_EXTMOD),) |
409 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
410 | config-targets := 1 |
411 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) |
412 | mixed-targets := 1 |
413 | endif |
414 | endif |
415 | endif |
416 | |
417 | ifeq ($(mixed-targets),1) |
418 | # =========================================================================== |
419 | # We're called with mixed targets (*config and build targets). |
420 | # Handle them one by one. |
421 | |
422 | %:: FORCE |
423 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ |
424 | |
425 | else |
426 | ifeq ($(config-targets),1) |
427 | # =========================================================================== |
428 | # *config targets only - make sure prerequisites are updated, and descend |
429 | # in scripts/kconfig to make the *config target |
430 | |
431 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
432 | # KBUILD_DEFCONFIG may point out an alternative default configuration |
433 | # used for 'make defconfig' |
434 | -include $(srctree)/arch/$(ARCH)/Makefile |
435 | export KBUILD_DEFCONFIG |
436 | |
437 | config: scripts_basic outputmakefile gen_build_files FORCE |
438 | $(Q)mkdir -p include |
439 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
440 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease |
441 | |
442 | %config: scripts_basic outputmakefile gen_build_files FORCE |
443 | $(Q)mkdir -p include |
444 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
445 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease |
446 | |
447 | else |
448 | # =========================================================================== |
449 | # Build targets only - this includes busybox, arch specific targets, clean |
450 | # targets and others. In general all targets except *config targets. |
451 | |
452 | ifeq ($(KBUILD_EXTMOD),) |
453 | # Additional helpers built in scripts/ |
454 | # Carefully list dependencies so we do not try to build scripts twice |
455 | # in parallel |
456 | PHONY += scripts |
457 | scripts: gen_build_files scripts_basic include/config/MARKER |
458 | $(Q)$(MAKE) $(build)=$(@) |
459 | |
460 | scripts_basic: include/autoconf.h |
461 | |
462 | # Objects we will link into busybox / subdirs we need to visit |
463 | core-y := \ |
464 | applets/ \ |
465 | |
466 | libs-y := \ |
467 | archival/ \ |
468 | archival/libarchive/ \ |
469 | console-tools/ \ |
470 | coreutils/ \ |
471 | coreutils/libcoreutils/ \ |
472 | debianutils/ \ |
473 | e2fsprogs/ \ |
474 | editors/ \ |
475 | findutils/ \ |
476 | init/ \ |
477 | libbb/ \ |
478 | libpwdgrp/ \ |
479 | loginutils/ \ |
480 | mailutils/ \ |
481 | miscutils/ \ |
482 | modutils/ \ |
483 | networking/ \ |
484 | networking/libiproute/ \ |
485 | networking/udhcp/ \ |
486 | printutils/ \ |
487 | procps/ \ |
488 | runit/ \ |
489 | selinux/ \ |
490 | shell/ \ |
491 | sysklogd/ \ |
492 | util-linux/ \ |
493 | util-linux/volume_id/ \ |
494 | |
495 | endif # KBUILD_EXTMOD |
496 | |
497 | ifeq ($(dot-config),1) |
498 | # In this section, we need .config |
499 | |
500 | # Read in dependencies to all Kconfig* files, make sure to run |
501 | # oldconfig if changes are detected. |
502 | -include .kconfig.d |
503 | |
504 | -include .config |
505 | |
506 | # If .config needs to be updated, it will be done via the dependency |
507 | # that autoconf has on .config. |
508 | # To avoid any implicit rule to kick in, define an empty command |
509 | .config .kconfig.d: ; |
510 | |
511 | # Now we can define CFLAGS etc according to .config |
512 | include $(srctree)/Makefile.flags |
513 | |
514 | # If .config is newer than include/autoconf.h, someone tinkered |
515 | # with it and forgot to run make oldconfig. |
516 | # If kconfig.d is missing then we are probarly in a cleaned tree so |
517 | # we execute the config step to be sure to catch updated Kconfig files |
518 | include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files |
519 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
520 | |
521 | include/usage.h: gen_build_files |
522 | |
523 | else |
524 | # Dummy target needed, because used as prerequisite |
525 | include/autoconf.h: ; |
526 | endif |
527 | |
528 | # The all: target is the default when no target is given on the |
529 | # command line. |
530 | # This allow a user to issue only 'make' to build a kernel including modules |
531 | # Defaults busybox but it is usually overridden in the arch makefile |
532 | all: busybox doc |
533 | |
534 | -include $(srctree)/arch/$(ARCH)/Makefile |
535 | |
536 | # arch Makefile may override CC so keep this after arch Makefile is included |
537 | #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
538 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
539 | |
540 | # Default kernel image to build when no specific target is given. |
541 | # KBUILD_IMAGE may be overruled on the commandline or |
542 | # set in the environment |
543 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
544 | # this default value |
545 | export KBUILD_IMAGE ?= busybox |
546 | |
547 | # |
548 | # INSTALL_PATH specifies where to place the updated kernel and system map |
549 | # images. Default is /boot, but you can set it to other values |
550 | export INSTALL_PATH ?= /boot |
551 | |
552 | # |
553 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
554 | # relocations required by build roots. This is not defined in the |
555 | # makefile but the argument can be passed to make if needed. |
556 | # |
557 | |
558 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
559 | export MODLIB |
560 | |
561 | |
562 | ifeq ($(KBUILD_EXTMOD),) |
563 | busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) |
564 | |
565 | busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ |
566 | $(core-n) $(core-) $(libs-n) $(libs-) \ |
567 | ))) |
568 | |
569 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) |
570 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
571 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) |
572 | libs-y := $(libs-y1) $(libs-y2) |
573 | |
574 | # Build busybox |
575 | # --------------------------------------------------------------------------- |
576 | # busybox is build from the objects selected by $(busybox-init) and |
577 | # $(busybox-main). Most are built-in.o files from top-level directories |
578 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile. |
579 | # Ordering when linking is important, and $(busybox-init) must be first. |
580 | # |
581 | # busybox |
582 | # ^ |
583 | # | |
584 | # +-< $(busybox-init) |
585 | # | +--< init/version.o + more |
586 | # | |
587 | # +--< $(busybox-main) |
588 | # | +--< driver/built-in.o mm/built-in.o + more |
589 | # | |
590 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) |
591 | # |
592 | # busybox version (uname -v) cannot be updated during normal |
593 | # descending-into-subdirs phase since we do not yet know if we need to |
594 | # update busybox. |
595 | # Therefore this step is delayed until just before final link of busybox - |
596 | # except in the kallsyms case where it is done just before adding the |
597 | # symbols to the kernel. |
598 | # |
599 | # System.map is generated to document addresses of all kernel symbols |
600 | |
601 | busybox-all := $(core-y) $(libs-y) |
602 | |
603 | # Rule to link busybox - also used during CONFIG_KALLSYMS |
604 | # May be overridden by arch/$(ARCH)/Makefile |
605 | quiet_cmd_busybox__ ?= LINK $@ |
606 | cmd_busybox__ ?= $(srctree)/scripts/trylink \ |
607 | "$@" \ |
608 | "$(CC)" \ |
609 | "$(CFLAGS) $(CFLAGS_busybox)" \ |
610 | "$(LDFLAGS) $(EXTRA_LDFLAGS)" \ |
611 | "$(core-y)" \ |
612 | "$(libs-y)" \ |
613 | "$(LDLIBS)" \ |
614 | && $(srctree)/scripts/generate_BUFSIZ.sh --post include/common_bufsiz.h |
615 | |
616 | # Generate System.map |
617 | quiet_cmd_sysmap = SYSMAP |
618 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap |
619 | |
620 | # Link of busybox |
621 | # If CONFIG_KALLSYMS is set .version is already updated |
622 | # Generate System.map and verify that the content is consistent |
623 | # Use + in front of the busybox_version rule to silent warning with make -j2 |
624 | # First command is ':' to allow us to use + in front of the rule |
625 | define rule_busybox__ |
626 | : |
627 | $(call cmd,busybox__) |
628 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd |
629 | endef |
630 | |
631 | |
632 | ifdef CONFIG_KALLSYMS |
633 | # Generate section listing all symbols and add it into busybox $(kallsyms.o) |
634 | # It's a three stage process: |
635 | # o .tmp_busybox1 has all symbols and sections, but __kallsyms is |
636 | # empty |
637 | # Running kallsyms on that gives us .tmp_kallsyms1.o with |
638 | # the right size - busybox version (uname -v) is updated during this step |
639 | # o .tmp_busybox2 now has a __kallsyms section of the right size, |
640 | # but due to the added section, some addresses have shifted. |
641 | # From here, we generate a correct .tmp_kallsyms2.o |
642 | # o The correct .tmp_kallsyms2.o is linked into the final busybox. |
643 | # o Verify that the System.map from busybox matches the map from |
644 | # .tmp_busybox2, just in case we did not generate kallsyms correctly. |
645 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using |
646 | # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a |
647 | # temporary bypass to allow the kernel to be built while the |
648 | # maintainers work out what went wrong with kallsyms. |
649 | |
650 | ifdef CONFIG_KALLSYMS_EXTRA_PASS |
651 | last_kallsyms := 3 |
652 | else |
653 | last_kallsyms := 2 |
654 | endif |
655 | |
656 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o |
657 | |
658 | define verify_kallsyms |
659 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
660 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ |
661 | $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map |
662 | $(Q)cmp -s System.map .tmp_System.map || \ |
663 | (echo Inconsistent kallsyms data; \ |
664 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ |
665 | rm .tmp_kallsyms* ; /bin/false ) |
666 | endef |
667 | |
668 | # Update busybox version before link |
669 | # Use + in front of this rule to silent warning about make -j1 |
670 | # First command is ':' to allow us to use + in front of this rule |
671 | cmd_ksym_ld = $(cmd_busybox__) |
672 | define rule_ksym_ld |
673 | : |
674 | +$(call cmd,busybox_version) |
675 | $(call cmd,busybox__) |
676 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd |
677 | endef |
678 | |
679 | # Generate .S file with all kernel symbols |
680 | quiet_cmd_kallsyms = KSYM $@ |
681 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ |
682 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ |
683 | |
684 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE |
685 | $(call if_changed_dep,as_o_S) |
686 | |
687 | .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) |
688 | $(call cmd,kallsyms) |
689 | |
690 | # .tmp_busybox1 must be complete except kallsyms, so update busybox version |
691 | .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE |
692 | $(call if_changed_rule,ksym_ld) |
693 | |
694 | .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE |
695 | $(call if_changed,busybox__) |
696 | |
697 | .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE |
698 | $(call if_changed,busybox__) |
699 | |
700 | # Needs to visit scripts/ before $(KALLSYMS) can be used. |
701 | $(KALLSYMS): scripts ; |
702 | |
703 | # Generate some data for debugging strange kallsyms problems |
704 | debug_kallsyms: .tmp_map$(last_kallsyms) |
705 | |
706 | .tmp_map%: .tmp_busybox% FORCE |
707 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ |
708 | |
709 | .tmp_map3: .tmp_map2 |
710 | |
711 | .tmp_map2: .tmp_map1 |
712 | |
713 | endif # ifdef CONFIG_KALLSYMS |
714 | |
715 | # busybox image - including updated kernel symbols |
716 | busybox_unstripped: $(busybox-all) FORCE |
717 | $(call if_changed_rule,busybox__) |
718 | $(Q)rm -f .old_version |
719 | |
720 | busybox: busybox_unstripped |
721 | ifeq ($(SKIP_STRIP),y) |
722 | $(Q)cp $< $@ |
723 | else |
724 | $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \ |
725 | busybox_unstripped -o $@ |
726 | # strip is confused by PIE executable and does not set exec bits |
727 | $(Q)chmod a+x $@ |
728 | endif |
729 | |
730 | # The actual objects are generated when descending, |
731 | # make sure no implicit rule kicks in |
732 | $(sort $(busybox-all)): $(busybox-dirs) ; |
733 | |
734 | # Handle descending into subdirectories listed in $(busybox-dirs) |
735 | # Preset locale variables to speed up the build process. Limit locale |
736 | # tweaks to this spot to avoid wrong language settings when running |
737 | # make menuconfig etc. |
738 | # Error messages still appears in the original language |
739 | |
740 | PHONY += $(busybox-dirs) |
741 | $(busybox-dirs): prepare scripts |
742 | $(Q)$(MAKE) $(build)=$@ |
743 | |
744 | # Build the kernel release string |
745 | # The KERNELRELEASE is stored in a file named .kernelrelease |
746 | # to be used when executing for example make install or make modules_install |
747 | # |
748 | # Take the contents of any files called localversion* and the config |
749 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. |
750 | # LOCALVERSION from the command line override all of this |
751 | |
752 | nullstring := |
753 | space := $(nullstring) # end of line |
754 | |
755 | ___localver = $(objtree)/localversion* $(srctree)/localversion* |
756 | __localver = $(sort $(wildcard $(___localver))) |
757 | # skip backup files (containing '~') |
758 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) |
759 | |
760 | localver = $(subst $(space),, \ |
761 | $(shell cat /dev/null $(_localver)) \ |
762 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) |
763 | |
764 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called |
765 | # and if the SCM is know a tag from the SCM is appended. |
766 | # The appended tag is determinded by the SCM used. |
767 | # |
768 | # Currently, only git is supported. |
769 | # Other SCMs can edit scripts/setlocalversion and add the appropriate |
770 | # checks as needed. |
771 | ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO |
772 | _localver-auto = $(shell $(CONFIG_SHELL) \ |
773 | $(srctree)/scripts/setlocalversion $(srctree)) |
774 | localver-auto = $(LOCALVERSION)$(_localver-auto) |
775 | endif |
776 | |
777 | localver-full = $(localver)$(localver-auto) |
778 | |
779 | # Store (new) KERNELRELASE string in .kernelrelease |
780 | kernelrelease = $(KERNELVERSION)$(localver-full) |
781 | .kernelrelease: FORCE |
782 | $(Q)rm -f $@ |
783 | $(Q)echo $(kernelrelease) > $@ |
784 | |
785 | |
786 | # Things we need to do before we recursively start building the kernel |
787 | # or the modules are listed in "prepare". |
788 | # A multi level approach is used. prepareN is processed before prepareN-1. |
789 | # archprepare is used in arch Makefiles and when processed asm symlink, |
790 | # version.h and scripts_basic is processed / created. |
791 | |
792 | # Listed in dependency order |
793 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
794 | |
795 | # prepare-all is deprecated, use prepare as valid replacement |
796 | PHONY += prepare-all |
797 | |
798 | # prepare3 is used to check if we are building in a separate output directory, |
799 | # and if so do: |
800 | # 1) Check that make has not been executed in the kernel src $(srctree) |
801 | # 2) Create the include2 directory, used for the second asm symlink |
802 | prepare3: .kernelrelease |
803 | ifneq ($(KBUILD_SRC),) |
804 | @echo ' Using $(srctree) as source for busybox' |
805 | $(Q)if [ -f $(srctree)/.config ]; then \ |
806 | echo " $(srctree) is not clean, please run 'make mrproper'";\ |
807 | echo " in the '$(srctree)' directory.";\ |
808 | /bin/false; \ |
809 | fi; |
810 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; |
811 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm |
812 | endif |
813 | |
814 | # prepare2 creates a makefile if using a separate output directory |
815 | prepare2: prepare3 outputmakefile |
816 | |
817 | prepare1: prepare2 include/config/MARKER |
818 | ifneq ($(KBUILD_MODULES),) |
819 | $(Q)mkdir -p $(MODVERDIR) |
820 | $(Q)rm -f $(MODVERDIR)/* |
821 | endif |
822 | |
823 | archprepare: prepare1 scripts_basic applets_dir |
824 | |
825 | prepare0: archprepare FORCE |
826 | $(Q)$(MAKE) $(build)=. |
827 | |
828 | # All the preparing.. |
829 | prepare prepare-all: prepare0 |
830 | |
831 | # Leave this as default for preprocessing busybox.lds.S, which is now |
832 | # done in arch/$(ARCH)/kernel/Makefile |
833 | |
834 | export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) |
835 | |
836 | # FIXME: The asm symlink changes when $(ARCH) changes. That's |
837 | # hard to detect, but I suppose "make mrproper" is a good idea |
838 | # before switching between archs anyway. |
839 | |
840 | #bbox# include/asm: |
841 | #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' |
842 | #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; |
843 | #bbox# @ln -fsn asm-$(ARCH) $@ |
844 | |
845 | # Split autoconf.h into include/linux/config/* |
846 | quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h |
847 | cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs include/bbconfigopts.h include/bbconfigopts_bz2.h |
848 | quiet_cmd_gen_common_bufsiz = GEN include/common_bufsiz.h |
849 | cmd_gen_common_bufsiz = $(srctree)/scripts/generate_BUFSIZ.sh include/common_bufsiz.h |
850 | quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/* |
851 | cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config |
852 | #bbox# piggybacked generation of few .h files |
853 | include/config/MARKER: scripts/basic/split-include include/autoconf.h |
854 | $(call cmd,split_autoconf) |
855 | $(call cmd,gen_bbconfigopts) |
856 | $(call cmd,gen_common_bufsiz) |
857 | @touch $@ |
858 | |
859 | # Generate some files |
860 | # --------------------------------------------------------------------------- |
861 | |
862 | # KERNELRELEASE can change from a few different places, meaning version.h |
863 | # needs to be updated, so this check is forced on all builds |
864 | |
865 | uts_len := 64 |
866 | |
867 | define filechk_version.h |
868 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
869 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
870 | exit 1; \ |
871 | fi; \ |
872 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ |
873 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ |
874 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ |
875 | ) |
876 | endef |
877 | |
878 | # --------------------------------------------------------------------------- |
879 | |
880 | PHONY += depend dep |
881 | depend dep: |
882 | @echo '*** Warning: make $@ is unnecessary now.' |
883 | |
884 | # --------------------------------------------------------------------------- |
885 | # Modules |
886 | |
887 | ifdef _BB_DISABLED_CONFIG_MODULES |
888 | |
889 | # By default, build modules as well |
890 | |
891 | all: modules |
892 | |
893 | # Build modules |
894 | |
895 | PHONY += modules |
896 | modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) |
897 | @echo ' Building modules, stage 2.'; |
898 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
899 | |
900 | |
901 | # Target to prepare building external modules |
902 | PHONY += modules_prepare |
903 | modules_prepare: prepare scripts |
904 | |
905 | # Target to install modules |
906 | PHONY += modules_install |
907 | modules_install: _modinst_ _modinst_post |
908 | |
909 | PHONY += _modinst_ |
910 | _modinst_: |
911 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ |
912 | echo "Warning: you may need to install module-init-tools"; \ |
913 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ |
914 | sleep 1; \ |
915 | fi |
916 | @rm -rf $(MODLIB)/kernel |
917 | @rm -f $(MODLIB)/source |
918 | @mkdir -p $(MODLIB)/kernel |
919 | @ln -s $(srctree) $(MODLIB)/source |
920 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
921 | rm -f $(MODLIB)/build ; \ |
922 | ln -s $(objtree) $(MODLIB)/build ; \ |
923 | fi |
924 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst |
925 | |
926 | # If System.map exists, run depmod. This deliberately does not have a |
927 | # dependency on System.map since that would run the dependency tree on |
928 | # busybox. This depmod is only for convenience to give the initial |
929 | # boot a modules.dep even before / is mounted read-write. However the |
930 | # boot script depmod is the master version. |
931 | ifeq "$(strip $(INSTALL_MOD_PATH))" "" |
932 | depmod_opts := |
933 | else |
934 | depmod_opts := -b $(INSTALL_MOD_PATH) -r |
935 | endif |
936 | PHONY += _modinst_post |
937 | _modinst_post: _modinst_ |
938 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi |
939 | |
940 | else # CONFIG_MODULES |
941 | |
942 | # Modules not configured |
943 | # --------------------------------------------------------------------------- |
944 | |
945 | modules modules_install: FORCE |
946 | @echo |
947 | @echo "The present busybox configuration has modules disabled." |
948 | @echo "Type 'make config' and enable loadable module support." |
949 | @echo "Then build a kernel with module support enabled." |
950 | @echo |
951 | @exit 1 |
952 | |
953 | endif # CONFIG_MODULES |
954 | |
955 | ### |
956 | # Cleaning is done on three levels. |
957 | # make clean Delete most generated files |
958 | # Leave enough to build external modules |
959 | # make mrproper Delete the current configuration, and all generated files |
960 | # make distclean Remove editor backup files, patch leftover files and the like |
961 | |
962 | # Directories & files removed with 'make clean' |
963 | CLEAN_DIRS += $(MODVERDIR) _install 0_lib |
964 | CLEAN_FILES += busybox busybox_unstripped* busybox.links \ |
965 | System.map .kernelrelease \ |
966 | .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map |
967 | |
968 | # Directories & files removed with 'make mrproper' |
969 | MRPROPER_DIRS += include/config include2 |
970 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ |
971 | include/NUM_APPLETS.h \ |
972 | include/common_bufsiz.h \ |
973 | include/autoconf.h \ |
974 | include/bbconfigopts.h \ |
975 | include/bbconfigopts_bz2.h \ |
976 | include/usage_compressed.h \ |
977 | include/applet_tables.h \ |
978 | include/applets.h \ |
979 | include/usage.h \ |
980 | applets/usage \ |
981 | .kernelrelease Module.symvers tags TAGS cscope* \ |
982 | busybox_old |
983 | |
984 | # clean - Delete most, but leave enough to build external modules |
985 | # |
986 | clean: rm-dirs := $(CLEAN_DIRS) |
987 | clean: rm-files := $(CLEAN_FILES) |
988 | clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs)) |
989 | |
990 | PHONY += $(clean-dirs) clean archclean |
991 | $(clean-dirs): |
992 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
993 | |
994 | clean: archclean $(clean-dirs) |
995 | $(call cmd,rmdirs) |
996 | $(call cmd,rmfiles) |
997 | @find . $(RCS_FIND_IGNORE) \ |
998 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
999 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
1000 | -type f -print | xargs rm -f |
1001 | |
1002 | PHONY += doc-clean |
1003 | doc-clean: rm-files := docs/busybox.pod \ |
1004 | docs/BusyBox.html docs/busybox.1 docs/BusyBox.txt |
1005 | doc-clean: |
1006 | $(call cmd,rmfiles) |
1007 | |
1008 | # mrproper - Delete all generated files, including .config |
1009 | # |
1010 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
1011 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
1012 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1013 | |
1014 | PHONY += $(mrproper-dirs) mrproper archmrproper |
1015 | $(mrproper-dirs): |
1016 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
1017 | |
1018 | mrproper: clean archmrproper $(mrproper-dirs) |
1019 | $(call cmd,rmdirs) |
1020 | $(call cmd,rmfiles) |
1021 | @find . -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f |
1022 | @find . -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f |
1023 | |
1024 | # distclean |
1025 | # |
1026 | PHONY += distclean |
1027 | |
1028 | distclean: mrproper |
1029 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
1030 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
1031 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
1032 | -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \ |
1033 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ |
1034 | -type f -print | xargs rm -f |
1035 | |
1036 | |
1037 | # Packaging of the kernel to various formats |
1038 | # --------------------------------------------------------------------------- |
1039 | # rpm target kept for backward compatibility |
1040 | package-dir := $(srctree)/scripts/package |
1041 | |
1042 | %pkg: FORCE |
1043 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1044 | rpm: FORCE |
1045 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1046 | |
1047 | |
1048 | # Brief documentation of the typical targets used |
1049 | # --------------------------------------------------------------------------- |
1050 | |
1051 | boards := $(wildcard $(srctree)/configs/*_defconfig) |
1052 | boards := $(notdir $(boards)) |
1053 | |
1054 | -include $(srctree)/Makefile.help |
1055 | |
1056 | # Documentation targets |
1057 | # --------------------------------------------------------------------------- |
1058 | %docs: scripts_basic FORCE |
1059 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ |
1060 | |
1061 | else # KBUILD_EXTMOD |
1062 | |
1063 | ### |
1064 | # External module support. |
1065 | # When building external modules the kernel used as basis is considered |
1066 | # read-only, and no consistency checks are made and the make |
1067 | # system is not used on the basis kernel. If updates are required |
1068 | # in the basis kernel ordinary make commands (without M=...) must |
1069 | # be used. |
1070 | # |
1071 | # The following are the only valid targets when building external |
1072 | # modules. |
1073 | # make M=dir clean Delete all automatically generated files |
1074 | # make M=dir modules Make all modules in specified dir |
1075 | # make M=dir Same as 'make M=dir modules' |
1076 | # make M=dir modules_install |
1077 | # Install the modules build in the module directory |
1078 | # Assumes install directory is already created |
1079 | |
1080 | # We are always building modules |
1081 | KBUILD_MODULES := 1 |
1082 | PHONY += crmodverdir |
1083 | crmodverdir: |
1084 | $(Q)mkdir -p $(MODVERDIR) |
1085 | $(Q)rm -f $(MODVERDIR)/* |
1086 | |
1087 | PHONY += $(objtree)/Module.symvers |
1088 | $(objtree)/Module.symvers: |
1089 | @test -e $(objtree)/Module.symvers || ( \ |
1090 | echo; \ |
1091 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ |
1092 | echo " is missing; modules will have no dependencies and modversions."; \ |
1093 | echo ) |
1094 | |
1095 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) |
1096 | PHONY += $(module-dirs) modules |
1097 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
1098 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
1099 | |
1100 | modules: $(module-dirs) |
1101 | @echo ' Building modules, stage 2.'; |
1102 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
1103 | |
1104 | PHONY += modules_install |
1105 | modules_install: _emodinst_ _emodinst_post |
1106 | |
1107 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1108 | PHONY += _emodinst_ |
1109 | _emodinst_: |
1110 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
1111 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst |
1112 | |
1113 | # Run depmod only is we have System.map and depmod is executable |
1114 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
1115 | cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ |
1116 | $(DEPMOD) -ae -F System.map \ |
1117 | $(if $(strip $(INSTALL_MOD_PATH)), \ |
1118 | -b $(INSTALL_MOD_PATH) -r) \ |
1119 | $(KERNELRELEASE); \ |
1120 | fi |
1121 | |
1122 | PHONY += _emodinst_post |
1123 | _emodinst_post: _emodinst_ |
1124 | $(call cmd,depmod) |
1125 | |
1126 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1127 | |
1128 | PHONY += $(clean-dirs) clean |
1129 | $(clean-dirs): |
1130 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
1131 | |
1132 | clean: rm-dirs := $(MODVERDIR) |
1133 | clean: $(clean-dirs) |
1134 | $(call cmd,rmdirs) |
1135 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ |
1136 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
1137 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
1138 | -type f -print | xargs rm -f |
1139 | |
1140 | # Dummies... |
1141 | PHONY += prepare scripts |
1142 | prepare: ; |
1143 | scripts: ; |
1144 | endif # KBUILD_EXTMOD |
1145 | |
1146 | # Generate tags for editors |
1147 | # --------------------------------------------------------------------------- |
1148 | |
1149 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set |
1150 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. |
1151 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! |
1152 | |
1153 | ifeq ($(src),$(obj)) |
1154 | __srctree = |
1155 | else |
1156 | __srctree = $(srctree)/ |
1157 | endif |
1158 | |
1159 | ifeq ($(ALLSOURCE_ARCHS),) |
1160 | ifeq ($(ARCH),um) |
1161 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) |
1162 | else |
1163 | ALLINCLUDE_ARCHS := $(ARCH) |
1164 | endif |
1165 | else |
1166 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. |
1167 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) |
1168 | endif |
1169 | |
1170 | ALLSOURCE_ARCHS := $(ARCH) |
1171 | |
1172 | define all-sources |
1173 | ( find -regex '.*\.[ch]$$' ) |
1174 | endef |
1175 | |
1176 | quiet_cmd_cscope-file = FILELST cscope.files |
1177 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files |
1178 | |
1179 | quiet_cmd_cscope = MAKE cscope.out |
1180 | cmd_cscope = cscope -b |
1181 | |
1182 | cscope: FORCE |
1183 | $(call cmd,cscope-file) |
1184 | $(call cmd,cscope) |
1185 | |
1186 | quiet_cmd_TAGS = MAKE $@ |
1187 | define cmd_TAGS |
1188 | rm -f $@; \ |
1189 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ |
1190 | echo "-I __initdata,__exitdata,__acquires,__releases \ |
1191 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ |
1192 | --extra=+f --c-kinds=+px"`; \ |
1193 | $(all-sources) | xargs etags $$ETAGSF -a |
1194 | endef |
1195 | |
1196 | TAGS: FORCE |
1197 | $(call cmd,TAGS) |
1198 | |
1199 | |
1200 | quiet_cmd_tags = MAKE $@ |
1201 | define cmd_tags |
1202 | rm -f $@; \ |
1203 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ |
1204 | echo "-I __initdata,__exitdata,__acquires,__releases \ |
1205 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ |
1206 | --extra=+f --c-kinds=+px"`; \ |
1207 | $(all-sources) | xargs ctags $$CTAGSF -a |
1208 | endef |
1209 | |
1210 | tags: FORCE |
1211 | $(call cmd,tags) |
1212 | |
1213 | |
1214 | # Scripts to check various things for consistency |
1215 | # --------------------------------------------------------------------------- |
1216 | |
1217 | includecheck: |
1218 | find * $(RCS_FIND_IGNORE) \ |
1219 | -name '*.[hcS]' -type f -print | sort \ |
1220 | | xargs $(PERL) -w scripts/checkincludes.pl |
1221 | |
1222 | versioncheck: |
1223 | find * $(RCS_FIND_IGNORE) \ |
1224 | -name '*.[hcS]' -type f -print | sort \ |
1225 | | xargs $(PERL) -w scripts/checkversion.pl |
1226 | |
1227 | namespacecheck: |
1228 | $(PERL) $(srctree)/scripts/namespace.pl |
1229 | |
1230 | endif #ifeq ($(config-targets),1) |
1231 | endif #ifeq ($(mixed-targets),1) |
1232 | |
1233 | PHONY += checkstack |
1234 | checkstack: |
1235 | $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ |
1236 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH) |
1237 | |
1238 | kernelrelease: |
1239 | $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ |
1240 | $(error kernelrelease not valid - run 'make *config' to update it)) |
1241 | kernelversion: |
1242 | @echo $(KERNELVERSION) |
1243 | |
1244 | # Single targets |
1245 | # --------------------------------------------------------------------------- |
1246 | # Single targets are compatible with: |
1247 | # - build whith mixed source and output |
1248 | # - build with separate output dir 'make O=...' |
1249 | # - external modules |
1250 | # |
1251 | # target-dir => where to store outputfile |
1252 | # build-dir => directory in kernel source tree to use |
1253 | |
1254 | ifeq ($(KBUILD_EXTMOD),) |
1255 | build-dir = $(patsubst %/,%,$(dir $@)) |
1256 | target-dir = $(dir $@) |
1257 | else |
1258 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) |
1259 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) |
1260 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) |
1261 | endif |
1262 | |
1263 | %.s: %.c prepare scripts FORCE |
1264 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1265 | %.i: %.c prepare scripts FORCE |
1266 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1267 | %.o: %.c prepare scripts FORCE |
1268 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1269 | %.lst: %.c prepare scripts FORCE |
1270 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1271 | %.s: %.S prepare scripts FORCE |
1272 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1273 | %.o: %.S prepare scripts FORCE |
1274 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
1275 | |
1276 | # Modules |
1277 | %/: prepare scripts FORCE |
1278 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
1279 | $(build)=$(build-dir) |
1280 | /: prepare scripts FORCE |
1281 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
1282 | $(build)=$(build-dir) |
1283 | |
1284 | %.ko: prepare scripts FORCE |
1285 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
1286 | $(build)=$(build-dir) $(@:.ko=.o) |
1287 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
1288 | |
1289 | # FIXME Should go into a make.lib or something |
1290 | # =========================================================================== |
1291 | |
1292 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) |
1293 | cmd_rmdirs = rm -rf $(rm-dirs) |
1294 | |
1295 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
1296 | cmd_rmfiles = rm -f $(rm-files) |
1297 | |
1298 | |
1299 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ |
1300 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \ |
1301 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) |
1302 | |
1303 | quiet_cmd_as_o_S = AS $@ |
1304 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
1305 | |
1306 | # read all saved command lines |
1307 | |
1308 | targets := $(wildcard $(sort $(targets))) |
1309 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
1310 | |
1311 | ifneq ($(cmd_files),) |
1312 | $(cmd_files): ; # Do not try to update included dependency files |
1313 | include $(cmd_files) |
1314 | endif |
1315 | |
1316 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
1317 | # Usage: |
1318 | # $(Q)$(MAKE) $(clean)=dir |
1319 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj |
1320 | |
1321 | endif # skip-makefile |
1322 | |
1323 | PHONY += FORCE |
1324 | FORCE: |
1325 | |
1326 | -include $(srctree)/Makefile.custom |
1327 | |
1328 | # Declare the contents of the .PHONY variable as phony. We keep that |
1329 | # information in a variable se we can use it in if_changed and friends. |
1330 | .PHONY: $(PHONY) |
1331 |