Annotation of /alx-src/tags/kernel26-2.6.12-alx-r9/Makefile
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File size: 44189 byte(s)
Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File size: 44189 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | niro | 628 | VERSION = 2 |
2 | PATCHLEVEL = 6 | ||
3 | SUBLEVEL = 12 | ||
4 | EXTRAVERSION = -alx-r9 | ||
5 | NAME=Woozy Numbat | ||
6 | |||
7 | # *DOCUMENTATION* | ||
8 | # To see a list of typical targets execute "make help" | ||
9 | # More info can be located in ./README | ||
10 | # Comments in this file are targeted only to the developer, do not | ||
11 | # expect to learn how to build the kernel reading this file. | ||
12 | |||
13 | # Do not print "Entering directory ..." | ||
14 | MAKEFLAGS += --no-print-directory | ||
15 | |||
16 | # We are using a recursive build, so we need to do a little thinking | ||
17 | # to get the ordering right. | ||
18 | # | ||
19 | # Most importantly: sub-Makefiles should only ever modify files in | ||
20 | # their own directory. If in some directory we have a dependency on | ||
21 | # a file in another dir (which doesn't happen often, but it's often | ||
22 | # unavoidable when linking the built-in.o targets which finally | ||
23 | # turn into vmlinux), we will call a sub make in that other dir, and | ||
24 | # after that we are sure that everything which is in that other dir | ||
25 | # is now up to date. | ||
26 | # | ||
27 | # The only cases where we need to modify files which have global | ||
28 | # effects are thus separated out and done before the recursive | ||
29 | # descending is started. They are now explicitly listed as the | ||
30 | # prepare rule. | ||
31 | |||
32 | # To put more focus on warnings, be less verbose as default | ||
33 | # Use 'make V=1' to see the full commands | ||
34 | |||
35 | ifdef V | ||
36 | ifeq ("$(origin V)", "command line") | ||
37 | KBUILD_VERBOSE = $(V) | ||
38 | endif | ||
39 | endif | ||
40 | ifndef KBUILD_VERBOSE | ||
41 | KBUILD_VERBOSE = 0 | ||
42 | endif | ||
43 | |||
44 | # Call sparse as part of compilation of C files | ||
45 | # Use 'make C=1' to enable sparse checking | ||
46 | |||
47 | ifdef C | ||
48 | ifeq ("$(origin C)", "command line") | ||
49 | KBUILD_CHECKSRC = $(C) | ||
50 | endif | ||
51 | endif | ||
52 | ifndef KBUILD_CHECKSRC | ||
53 | KBUILD_CHECKSRC = 0 | ||
54 | endif | ||
55 | |||
56 | # Use make M=dir to specify directory of external module to build | ||
57 | # Old syntax make ... SUBDIRS=$PWD is still supported | ||
58 | # Setting the environment variable KBUILD_EXTMOD take precedence | ||
59 | ifdef SUBDIRS | ||
60 | KBUILD_EXTMOD ?= $(SUBDIRS) | ||
61 | endif | ||
62 | ifdef M | ||
63 | ifeq ("$(origin M)", "command line") | ||
64 | KBUILD_EXTMOD := $(M) | ||
65 | endif | ||
66 | endif | ||
67 | |||
68 | |||
69 | # kbuild supports saving output files in a separate directory. | ||
70 | # To locate output files in a separate directory two syntaxes are supported. | ||
71 | # In both cases the working directory must be the root of the kernel src. | ||
72 | # 1) O= | ||
73 | # Use "make O=dir/to/store/output/files/" | ||
74 | # | ||
75 | # 2) Set KBUILD_OUTPUT | ||
76 | # Set the environment variable KBUILD_OUTPUT to point to the directory | ||
77 | # where the output files shall be placed. | ||
78 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | ||
79 | # make | ||
80 | # | ||
81 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | ||
82 | # variable. | ||
83 | |||
84 | |||
85 | # KBUILD_SRC is set on invocation of make in OBJ directory | ||
86 | # KBUILD_SRC is not intended to be used by the regular user (for now) | ||
87 | ifeq ($(KBUILD_SRC),) | ||
88 | |||
89 | # OK, Make called in directory where kernel src resides | ||
90 | # Do we want to locate output files in a separate directory? | ||
91 | ifdef O | ||
92 | ifeq ("$(origin O)", "command line") | ||
93 | KBUILD_OUTPUT := $(O) | ||
94 | endif | ||
95 | endif | ||
96 | |||
97 | # That's our default target when none is given on the command line | ||
98 | .PHONY: _all | ||
99 | _all: | ||
100 | |||
101 | ifneq ($(KBUILD_OUTPUT),) | ||
102 | # Invoke a second make in the output directory, passing relevant variables | ||
103 | # check that the output directory actually exists | ||
104 | saved-output := $(KBUILD_OUTPUT) | ||
105 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) | ||
106 | $(if $(KBUILD_OUTPUT),, \ | ||
107 | $(error output directory "$(saved-output)" does not exist)) | ||
108 | |||
109 | .PHONY: $(MAKECMDGOALS) | ||
110 | |||
111 | $(filter-out _all,$(MAKECMDGOALS)) _all: | ||
112 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ | ||
113 | KBUILD_SRC=$(CURDIR) KBUILD_VERBOSE=$(KBUILD_VERBOSE) \ | ||
114 | KBUILD_CHECK=$(KBUILD_CHECK) KBUILD_EXTMOD="$(KBUILD_EXTMOD)" \ | ||
115 | -f $(CURDIR)/Makefile $@ | ||
116 | |||
117 | # Leave processing to above invocation of make | ||
118 | skip-makefile := 1 | ||
119 | endif # ifneq ($(KBUILD_OUTPUT),) | ||
120 | endif # ifeq ($(KBUILD_SRC),) | ||
121 | |||
122 | # We process the rest of the Makefile if this is the final invocation of make | ||
123 | ifeq ($(skip-makefile),) | ||
124 | |||
125 | # If building an external module we do not care about the all: rule | ||
126 | # but instead _all depend on modules | ||
127 | .PHONY: all | ||
128 | ifeq ($(KBUILD_EXTMOD),) | ||
129 | _all: all | ||
130 | else | ||
131 | _all: modules | ||
132 | endif | ||
133 | |||
134 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) | ||
135 | TOPDIR := $(srctree) | ||
136 | # FIXME - TOPDIR is obsolete, use srctree/objtree | ||
137 | objtree := $(CURDIR) | ||
138 | src := $(srctree) | ||
139 | obj := $(objtree) | ||
140 | |||
141 | VPATH := $(srctree) | ||
142 | |||
143 | export srctree objtree VPATH TOPDIR | ||
144 | |||
145 | nullstring := | ||
146 | space := $(nullstring) # end of line | ||
147 | |||
148 | # Take the contents of any files called localversion* and the config | ||
149 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be | ||
150 | # careful not to include files twice if building in the source | ||
151 | # directory. LOCALVERSION from the command line override all of this | ||
152 | |||
153 | localver := $(objtree)/localversion* $(srctree)/localversion* | ||
154 | localver := $(sort $(wildcard $(localver))) | ||
155 | # skip backup files (containing '~') | ||
156 | localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f))) | ||
157 | |||
158 | LOCALVERSION = $(subst $(space),, \ | ||
159 | $(shell cat /dev/null $(localver)) \ | ||
160 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) | ||
161 | |||
162 | KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION) | ||
163 | |||
164 | # SUBARCH tells the usermode build what the underlying arch is. That is set | ||
165 | # first, and if a usermode build is happening, the "ARCH=um" on the command | ||
166 | # line overrides the setting of ARCH below. If a native build is happening, | ||
167 | # then ARCH is assigned, getting whatever value it gets normally, and | ||
168 | # SUBARCH is subsequently ignored. | ||
169 | |||
170 | SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ | ||
171 | -e s/arm.*/arm/ -e s/sa110/arm/ \ | ||
172 | -e s/s390x/s390/ -e s/parisc64/parisc/ ) | ||
173 | |||
174 | # Cross compiling and selecting different set of gcc/bin-utils | ||
175 | # --------------------------------------------------------------------------- | ||
176 | # | ||
177 | # When performing cross compilation for other architectures ARCH shall be set | ||
178 | # to the target architecture. (See arch/* for the possibilities). | ||
179 | # ARCH can be set during invocation of make: | ||
180 | # make ARCH=ia64 | ||
181 | # Another way is to have ARCH set in the environment. | ||
182 | # The default ARCH is the host where make is executed. | ||
183 | |||
184 | # CROSS_COMPILE specify the prefix used for all executables used | ||
185 | # during compilation. Only gcc and related bin-utils executables | ||
186 | # are prefixed with $(CROSS_COMPILE). | ||
187 | # CROSS_COMPILE can be set on the command line | ||
188 | # make CROSS_COMPILE=ia64-linux- | ||
189 | # Alternatively CROSS_COMPILE can be set in the environment. | ||
190 | # Default value for CROSS_COMPILE is not to prefix executables | ||
191 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | ||
192 | |||
193 | ARCH ?= $(SUBARCH) | ||
194 | CROSS_COMPILE ?= | ||
195 | |||
196 | # Architecture as present in compile.h | ||
197 | UTS_MACHINE := $(ARCH) | ||
198 | |||
199 | # SHELL used by kbuild | ||
200 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | ||
201 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | ||
202 | else echo sh; fi ; fi) | ||
203 | |||
204 | HOSTCC = gcc | ||
205 | HOSTCXX = g++ | ||
206 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer | ||
207 | HOSTCXXFLAGS = -O2 | ||
208 | |||
209 | # Decide whether to build built-in, modular, or both. | ||
210 | # Normally, just do built-in. | ||
211 | |||
212 | KBUILD_MODULES := | ||
213 | KBUILD_BUILTIN := 1 | ||
214 | |||
215 | # If we have only "make modules", don't compile built-in objects. | ||
216 | # When we're building modules with modversions, we need to consider | ||
217 | # the built-in objects during the descend as well, in order to | ||
218 | # make sure the checksums are uptodate before we record them. | ||
219 | |||
220 | ifeq ($(MAKECMDGOALS),modules) | ||
221 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | ||
222 | endif | ||
223 | |||
224 | # If we have "make <whatever> modules", compile modules | ||
225 | # in addition to whatever we do anyway. | ||
226 | # Just "make" or "make all" shall build modules as well | ||
227 | |||
228 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | ||
229 | KBUILD_MODULES := 1 | ||
230 | endif | ||
231 | |||
232 | ifeq ($(MAKECMDGOALS),) | ||
233 | KBUILD_MODULES := 1 | ||
234 | endif | ||
235 | |||
236 | export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE | ||
237 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD | ||
238 | |||
239 | # Beautify output | ||
240 | # --------------------------------------------------------------------------- | ||
241 | # | ||
242 | # Normally, we echo the whole command before executing it. By making | ||
243 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | ||
244 | # $(quiet) to choose other forms of output instead, e.g. | ||
245 | # | ||
246 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | ||
247 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | ||
248 | # | ||
249 | # If $(quiet) is empty, the whole command will be printed. | ||
250 | # If it is set to "quiet_", only the short version will be printed. | ||
251 | # If it is set to "silent_", nothing wil be printed at all, since | ||
252 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | ||
253 | # | ||
254 | # A simple variant is to prefix commands with $(Q) - that's usefull | ||
255 | # for commands that shall be hidden in non-verbose mode. | ||
256 | # | ||
257 | # $(Q)ln $@ :< | ||
258 | # | ||
259 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | ||
260 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | ||
261 | |||
262 | ifeq ($(KBUILD_VERBOSE),1) | ||
263 | quiet = | ||
264 | Q = | ||
265 | else | ||
266 | quiet=quiet_ | ||
267 | Q = @ | ||
268 | endif | ||
269 | |||
270 | # If the user is running make -s (silent mode), suppress echoing of | ||
271 | # commands | ||
272 | |||
273 | ifneq ($(findstring s,$(MAKEFLAGS)),) | ||
274 | quiet=silent_ | ||
275 | endif | ||
276 | |||
277 | export quiet Q KBUILD_VERBOSE | ||
278 | |||
279 | ###### | ||
280 | # cc support functions to be used (only) in arch/$(ARCH)/Makefile | ||
281 | # See documentation in Documentation/kbuild/makefiles.txt | ||
282 | |||
283 | # cc-option | ||
284 | # Usage: cflags-y += $(call gcc-option, -march=winchip-c6, -march=i586) | ||
285 | |||
286 | cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ | ||
287 | > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) | ||
288 | |||
289 | # For backward compatibility | ||
290 | check_gcc = $(warning check_gcc is deprecated - use cc-option) \ | ||
291 | $(call cc-option, $(1),$(2)) | ||
292 | |||
293 | # cc-option-yn | ||
294 | # Usage: flag := $(call cc-option-yn, -march=winchip-c6) | ||
295 | cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ | ||
296 | > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) | ||
297 | |||
298 | # cc-option-align | ||
299 | # Prefix align with either -falign or -malign | ||
300 | cc-option-align = $(subst -functions=0,,\ | ||
301 | $(call cc-option,-falign-functions=0,-malign-functions=0)) | ||
302 | |||
303 | # cc-version | ||
304 | # Usage gcc-ver := $(call cc-version $(CC)) | ||
305 | cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \ | ||
306 | $(if $(1), $(1), $(CC))) | ||
307 | |||
308 | |||
309 | # Look for make include files relative to root of kernel src | ||
310 | MAKEFLAGS += --include-dir=$(srctree) | ||
311 | |||
312 | # For maximum performance (+ possibly random breakage, uncomment | ||
313 | # the following) | ||
314 | |||
315 | #MAKEFLAGS += -rR | ||
316 | |||
317 | # Make variables (CC, etc...) | ||
318 | |||
319 | AS = $(CROSS_COMPILE)as | ||
320 | LD = $(CROSS_COMPILE)ld | ||
321 | CC = $(CROSS_COMPILE)gcc | ||
322 | CPP = $(CC) -E | ||
323 | AR = $(CROSS_COMPILE)ar | ||
324 | NM = $(CROSS_COMPILE)nm | ||
325 | STRIP = $(CROSS_COMPILE)strip | ||
326 | OBJCOPY = $(CROSS_COMPILE)objcopy | ||
327 | OBJDUMP = $(CROSS_COMPILE)objdump | ||
328 | AWK = awk | ||
329 | GENKSYMS = scripts/genksyms/genksyms | ||
330 | DEPMOD = /sbin/depmod | ||
331 | KALLSYMS = scripts/kallsyms | ||
332 | PERL = perl | ||
333 | CHECK = sparse | ||
334 | |||
335 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ | ||
336 | MODFLAGS = -DMODULE | ||
337 | CFLAGS_MODULE = $(MODFLAGS) | ||
338 | AFLAGS_MODULE = $(MODFLAGS) | ||
339 | LDFLAGS_MODULE = -r | ||
340 | CFLAGS_KERNEL = | ||
341 | AFLAGS_KERNEL = | ||
342 | |||
343 | |||
344 | # Use LINUXINCLUDE when you must reference the include/ directory. | ||
345 | # Needed to be compatible with the O= option | ||
346 | LINUXINCLUDE := -Iinclude \ | ||
347 | $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) | ||
348 | |||
349 | CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) | ||
350 | |||
351 | CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \ | ||
352 | -fno-strict-aliasing -fno-common \ | ||
353 | -ffreestanding | ||
354 | AFLAGS := -D__ASSEMBLY__ | ||
355 | |||
356 | export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \ | ||
357 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ | ||
358 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ | ||
359 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | ||
360 | |||
361 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS | ||
362 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | ||
363 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | ||
364 | |||
365 | # When compiling out-of-tree modules, put MODVERDIR in the module | ||
366 | # tree rather than in the kernel tree. The kernel tree might | ||
367 | # even be read-only. | ||
368 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | ||
369 | |||
370 | # The temporary file to save gcc -MD generated dependencies must not | ||
371 | # contain a comma | ||
372 | comma := , | ||
373 | depfile = $(subst $(comma),_,$(@D)/.$(@F).d) | ||
374 | |||
375 | # Files to ignore in find ... statements | ||
376 | |||
377 | RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o | ||
378 | RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc | ||
379 | |||
380 | # =========================================================================== | ||
381 | # Rules shared between *config targets and build targets | ||
382 | |||
383 | # Basic helpers built in scripts/ | ||
384 | .PHONY: scripts_basic | ||
385 | scripts_basic: | ||
386 | $(Q)$(MAKE) $(build)=scripts/basic | ||
387 | |||
388 | .PHONY: outputmakefile | ||
389 | # outputmakefile generate a Makefile to be placed in output directory, if | ||
390 | # using a seperate output directory. This allows convinient use | ||
391 | # of make in output directory | ||
392 | outputmakefile: | ||
393 | $(Q)if test ! $(srctree) -ef $(objtree); then \ | ||
394 | $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ | ||
395 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ | ||
396 | > $(objtree)/Makefile; \ | ||
397 | echo ' GEN $(objtree)/Makefile'; \ | ||
398 | fi | ||
399 | |||
400 | # To make sure we do not include .config for any of the *config targets | ||
401 | # catch them early, and hand them over to scripts/kconfig/Makefile | ||
402 | # It is allowed to specify more targets when calling make, including | ||
403 | # mixing *config targets and build targets. | ||
404 | # For example 'make oldconfig all'. | ||
405 | # Detect when mixed targets is specified, and make a second invocation | ||
406 | # of make so .config is not included in this case either (for *config). | ||
407 | |||
408 | no-dot-config-targets := clean mrproper distclean \ | ||
409 | cscope TAGS tags help %docs check% | ||
410 | |||
411 | config-targets := 0 | ||
412 | mixed-targets := 0 | ||
413 | dot-config := 1 | ||
414 | |||
415 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | ||
416 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | ||
417 | dot-config := 0 | ||
418 | endif | ||
419 | endif | ||
420 | |||
421 | ifeq ($(KBUILD_EXTMOD),) | ||
422 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | ||
423 | config-targets := 1 | ||
424 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) | ||
425 | mixed-targets := 1 | ||
426 | endif | ||
427 | endif | ||
428 | endif | ||
429 | |||
430 | ifeq ($(mixed-targets),1) | ||
431 | # =========================================================================== | ||
432 | # We're called with mixed targets (*config and build targets). | ||
433 | # Handle them one by one. | ||
434 | |||
435 | %:: FORCE | ||
436 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ | ||
437 | |||
438 | else | ||
439 | ifeq ($(config-targets),1) | ||
440 | # =========================================================================== | ||
441 | # *config targets only - make sure prerequisites are updated, and descend | ||
442 | # in scripts/kconfig to make the *config target | ||
443 | |||
444 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | ||
445 | # KBUILD_DEFCONFIG may point out an alternative default configuration | ||
446 | # used for 'make defconfig' | ||
447 | include $(srctree)/arch/$(ARCH)/Makefile | ||
448 | export KBUILD_DEFCONFIG | ||
449 | |||
450 | config: scripts_basic outputmakefile FORCE | ||
451 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | ||
452 | %config: scripts_basic outputmakefile FORCE | ||
453 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | ||
454 | |||
455 | else | ||
456 | # =========================================================================== | ||
457 | # Build targets only - this includes vmlinux, arch specific targets, clean | ||
458 | # targets and others. In general all targets except *config targets. | ||
459 | |||
460 | ifeq ($(KBUILD_EXTMOD),) | ||
461 | # Additional helpers built in scripts/ | ||
462 | # Carefully list dependencies so we do not try to build scripts twice | ||
463 | # in parrallel | ||
464 | .PHONY: scripts | ||
465 | scripts: scripts_basic include/config/MARKER | ||
466 | $(Q)$(MAKE) $(build)=$(@) | ||
467 | |||
468 | scripts_basic: include/linux/autoconf.h | ||
469 | |||
470 | # Objects we will link into vmlinux / subdirs we need to visit | ||
471 | init-y := init/ | ||
472 | drivers-y := drivers/ sound/ | ||
473 | net-y := net/ | ||
474 | libs-y := lib/ | ||
475 | core-y := usr/ | ||
476 | endif # KBUILD_EXTMOD | ||
477 | |||
478 | ifeq ($(dot-config),1) | ||
479 | # In this section, we need .config | ||
480 | |||
481 | # Read in dependencies to all Kconfig* files, make sure to run | ||
482 | # oldconfig if changes are detected. | ||
483 | -include .config.cmd | ||
484 | |||
485 | include .config | ||
486 | |||
487 | # If .config needs to be updated, it will be done via the dependency | ||
488 | # that autoconf has on .config. | ||
489 | # To avoid any implicit rule to kick in, define an empty command | ||
490 | .config: ; | ||
491 | |||
492 | # If .config is newer than include/linux/autoconf.h, someone tinkered | ||
493 | # with it and forgot to run make oldconfig | ||
494 | include/linux/autoconf.h: .config | ||
495 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig | ||
496 | else | ||
497 | # Dummy target needed, because used as prerequisite | ||
498 | include/linux/autoconf.h: ; | ||
499 | endif | ||
500 | |||
501 | # The all: target is the default when no target is given on the | ||
502 | # command line. | ||
503 | # This allow a user to issue only 'make' to build a kernel including modules | ||
504 | # Defaults vmlinux but it is usually overriden in the arch makefile | ||
505 | all: vmlinux | ||
506 | |||
507 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | ||
508 | CFLAGS += -Os | ||
509 | else | ||
510 | CFLAGS += -O2 | ||
511 | endif | ||
512 | |||
513 | #Add align options if CONFIG_CC_* is not equal to 0 | ||
514 | add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1))) | ||
515 | CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions) | ||
516 | CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels) | ||
517 | CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops) | ||
518 | CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps) | ||
519 | |||
520 | ifdef CONFIG_FRAME_POINTER | ||
521 | CFLAGS += -fno-omit-frame-pointer | ||
522 | else | ||
523 | CFLAGS += -fomit-frame-pointer | ||
524 | endif | ||
525 | |||
526 | ifdef CONFIG_DEBUG_INFO | ||
527 | CFLAGS += -g | ||
528 | endif | ||
529 | |||
530 | include $(srctree)/arch/$(ARCH)/Makefile | ||
531 | |||
532 | # arch Makefile may override CC so keep this after arch Makefile is included | ||
533 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | ||
534 | CHECKFLAGS += $(NOSTDINC_FLAGS) | ||
535 | |||
536 | # warn about C99 declaration after statement | ||
537 | CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) | ||
538 | |||
539 | # disable pointer signedness warnings in gcc 4.0 | ||
540 | CFLAGS += $(call cc-option,-Wno-pointer-sign,) | ||
541 | |||
542 | # Default kernel image to build when no specific target is given. | ||
543 | # KBUILD_IMAGE may be overruled on the commandline or | ||
544 | # set in the environment | ||
545 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | ||
546 | # this default value | ||
547 | export KBUILD_IMAGE ?= vmlinux | ||
548 | |||
549 | # | ||
550 | # INSTALL_PATH specifies where to place the updated kernel and system map | ||
551 | # images. Default is /boot, but you can set it to other values | ||
552 | export INSTALL_PATH ?= /boot | ||
553 | |||
554 | # | ||
555 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | ||
556 | # relocations required by build roots. This is not defined in the | ||
557 | # makefile but the arguement can be passed to make if needed. | ||
558 | # | ||
559 | |||
560 | MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | ||
561 | export MODLIB | ||
562 | |||
563 | |||
564 | ifeq ($(KBUILD_EXTMOD),) | ||
565 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ | ||
566 | |||
567 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | ||
568 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | ||
569 | $(net-y) $(net-m) $(libs-y) $(libs-m))) | ||
570 | |||
571 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | ||
572 | $(init-n) $(init-) \ | ||
573 | $(core-n) $(core-) $(drivers-n) $(drivers-) \ | ||
574 | $(net-n) $(net-) $(libs-n) $(libs-)))) | ||
575 | |||
576 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | ||
577 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | ||
578 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | ||
579 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | ||
580 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | ||
581 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | ||
582 | libs-y := $(libs-y1) $(libs-y2) | ||
583 | |||
584 | # Build vmlinux | ||
585 | # --------------------------------------------------------------------------- | ||
586 | # vmlinux is build from the objects selected by $(vmlinux-init) and | ||
587 | # $(vmlinux-main). Most are built-in.o files from top-level directories | ||
588 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile. | ||
589 | # Ordering when linking is important, and $(vmlinux-init) must be first. | ||
590 | # | ||
591 | # vmlinux | ||
592 | # ^ | ||
593 | # | | ||
594 | # +-< $(vmlinux-init) | ||
595 | # | +--< init/version.o + more | ||
596 | # | | ||
597 | # +--< $(vmlinux-main) | ||
598 | # | +--< driver/built-in.o mm/built-in.o + more | ||
599 | # | | ||
600 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) | ||
601 | # | ||
602 | # vmlinux version (uname -v) cannot be updated during normal | ||
603 | # descending-into-subdirs phase since we do not yet know if we need to | ||
604 | # update vmlinux. | ||
605 | # Therefore this step is delayed until just before final link of vmlinux - | ||
606 | # except in the kallsyms case where it is done just before adding the | ||
607 | # symbols to the kernel. | ||
608 | # | ||
609 | # System.map is generated to document addresses of all kernel symbols | ||
610 | |||
611 | vmlinux-init := $(head-y) $(init-y) | ||
612 | vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) | ||
613 | vmlinux-all := $(vmlinux-init) $(vmlinux-main) | ||
614 | vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds | ||
615 | |||
616 | # Rule to link vmlinux - also used during CONFIG_KALLSYMS | ||
617 | # May be overridden by arch/$(ARCH)/Makefile | ||
618 | quiet_cmd_vmlinux__ ?= LD $@ | ||
619 | cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ | ||
620 | -T $(vmlinux-lds) $(vmlinux-init) \ | ||
621 | --start-group $(vmlinux-main) --end-group \ | ||
622 | $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) | ||
623 | |||
624 | # Generate new vmlinux version | ||
625 | quiet_cmd_vmlinux_version = GEN .version | ||
626 | cmd_vmlinux_version = set -e; \ | ||
627 | . $(srctree)/scripts/mkversion > .tmp_version; \ | ||
628 | mv -f .tmp_version .version; \ | ||
629 | $(MAKE) $(build)=init | ||
630 | |||
631 | # Generate System.map | ||
632 | quiet_cmd_sysmap = SYSMAP | ||
633 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap | ||
634 | |||
635 | # Link of vmlinux | ||
636 | # If CONFIG_KALLSYMS is set .version is already updated | ||
637 | # Generate System.map and verify that the content is consistent | ||
638 | |||
639 | define rule_vmlinux__ | ||
640 | $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) | ||
641 | |||
642 | $(call cmd,vmlinux__) | ||
643 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | ||
644 | |||
645 | $(Q)$(if $($(quiet)cmd_sysmap), \ | ||
646 | echo ' $($(quiet)cmd_sysmap) System.map' &&) \ | ||
647 | $(cmd_sysmap) $@ System.map; \ | ||
648 | if [ $$? -ne 0 ]; then \ | ||
649 | rm -f $@; \ | ||
650 | /bin/false; \ | ||
651 | fi; | ||
652 | $(verify_kallsyms) | ||
653 | endef | ||
654 | |||
655 | |||
656 | ifdef CONFIG_KALLSYMS | ||
657 | # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) | ||
658 | # It's a three stage process: | ||
659 | # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is | ||
660 | # empty | ||
661 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | ||
662 | # the right size - vmlinux version (uname -v) is updated during this step | ||
663 | # o .tmp_vmlinux2 now has a __kallsyms section of the right size, | ||
664 | # but due to the added section, some addresses have shifted. | ||
665 | # From here, we generate a correct .tmp_kallsyms2.o | ||
666 | # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. | ||
667 | # o Verify that the System.map from vmlinux matches the map from | ||
668 | # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. | ||
669 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using | ||
670 | # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a | ||
671 | # temporary bypass to allow the kernel to be built while the | ||
672 | # maintainers work out what went wrong with kallsyms. | ||
673 | |||
674 | ifdef CONFIG_KALLSYMS_EXTRA_PASS | ||
675 | last_kallsyms := 3 | ||
676 | else | ||
677 | last_kallsyms := 2 | ||
678 | endif | ||
679 | |||
680 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o | ||
681 | |||
682 | define verify_kallsyms | ||
683 | $(Q)$(if $($(quiet)cmd_sysmap), \ | ||
684 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ | ||
685 | $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map | ||
686 | $(Q)cmp -s System.map .tmp_System.map || \ | ||
687 | (echo Inconsistent kallsyms data; \ | ||
688 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ | ||
689 | rm .tmp_kallsyms* ; /bin/false ) | ||
690 | endef | ||
691 | |||
692 | # Update vmlinux version before link | ||
693 | # Use + in front of this rule to silent warning about make -j1 | ||
694 | cmd_ksym_ld = $(cmd_vmlinux__) | ||
695 | define rule_ksym_ld | ||
696 | +$(call cmd,vmlinux_version) | ||
697 | $(call cmd,vmlinux__) | ||
698 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | ||
699 | endef | ||
700 | |||
701 | # Generate .S file with all kernel symbols | ||
702 | quiet_cmd_kallsyms = KSYM $@ | ||
703 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ | ||
704 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ | ||
705 | |||
706 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE | ||
707 | $(call if_changed_dep,as_o_S) | ||
708 | |||
709 | .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) | ||
710 | $(call cmd,kallsyms) | ||
711 | |||
712 | # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version | ||
713 | .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE | ||
714 | $(call if_changed_rule,ksym_ld) | ||
715 | |||
716 | .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE | ||
717 | $(call if_changed,vmlinux__) | ||
718 | |||
719 | .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE | ||
720 | $(call if_changed,vmlinux__) | ||
721 | |||
722 | # Needs to visit scripts/ before $(KALLSYMS) can be used. | ||
723 | $(KALLSYMS): scripts ; | ||
724 | |||
725 | endif # ifdef CONFIG_KALLSYMS | ||
726 | |||
727 | # vmlinux image - including updated kernel symbols | ||
728 | vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE | ||
729 | $(call if_changed_rule,vmlinux__) | ||
730 | |||
731 | # The actual objects are generated when descending, | ||
732 | # make sure no implicit rule kicks in | ||
733 | $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; | ||
734 | |||
735 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | ||
736 | # Preset locale variables to speed up the build process. Limit locale | ||
737 | # tweaks to this spot to avoid wrong language settings when running | ||
738 | # make menuconfig etc. | ||
739 | # Error messages still appears in the original language | ||
740 | |||
741 | .PHONY: $(vmlinux-dirs) | ||
742 | $(vmlinux-dirs): prepare-all scripts | ||
743 | $(Q)$(MAKE) $(build)=$@ | ||
744 | |||
745 | # Things we need to do before we recursively start building the kernel | ||
746 | # or the modules are listed in "prepare-all". | ||
747 | # A multi level approach is used. prepare1 is updated first, then prepare0. | ||
748 | # prepare-all is the collection point for the prepare targets. | ||
749 | |||
750 | .PHONY: prepare-all prepare prepare0 prepare1 prepare2 | ||
751 | |||
752 | # prepare2 is used to check if we are building in a separate output directory, | ||
753 | # and if so do: | ||
754 | # 1) Check that make has not been executed in the kernel src $(srctree) | ||
755 | # 2) Create the include2 directory, used for the second asm symlink | ||
756 | |||
757 | prepare2: | ||
758 | ifneq ($(KBUILD_SRC),) | ||
759 | @echo ' Using $(srctree) as source for kernel' | ||
760 | $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \ | ||
761 | echo " $(srctree) is not clean, please run 'make mrproper'";\ | ||
762 | echo " in the '$(srctree)' directory.";\ | ||
763 | /bin/false; \ | ||
764 | fi; | ||
765 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; | ||
766 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm | ||
767 | endif | ||
768 | |||
769 | # prepare1 creates a makefile if using a separate output directory | ||
770 | prepare1: prepare2 outputmakefile | ||
771 | |||
772 | prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER | ||
773 | ifneq ($(KBUILD_MODULES),) | ||
774 | $(Q)rm -rf $(MODVERDIR) | ||
775 | $(Q)mkdir -p $(MODVERDIR) | ||
776 | endif | ||
777 | |||
778 | # All the preparing.. | ||
779 | prepare-all: prepare0 prepare | ||
780 | |||
781 | # Leave this as default for preprocessing vmlinux.lds.S, which is now | ||
782 | # done in arch/$(ARCH)/kernel/Makefile | ||
783 | |||
784 | export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) | ||
785 | |||
786 | # Single targets | ||
787 | # --------------------------------------------------------------------------- | ||
788 | |||
789 | %.s: %.c scripts FORCE | ||
790 | $(Q)$(MAKE) $(build)=$(@D) $@ | ||
791 | %.i: %.c scripts FORCE | ||
792 | $(Q)$(MAKE) $(build)=$(@D) $@ | ||
793 | %.o: %.c scripts FORCE | ||
794 | $(Q)$(MAKE) $(build)=$(@D) $@ | ||
795 | %/: scripts prepare FORCE | ||
796 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) | ||
797 | %.lst: %.c scripts FORCE | ||
798 | $(Q)$(MAKE) $(build)=$(@D) $@ | ||
799 | %.s: %.S scripts FORCE | ||
800 | $(Q)$(MAKE) $(build)=$(@D) $@ | ||
801 | %.o: %.S scripts FORCE | ||
802 | $(Q)$(MAKE) $(build)=$(@D) $@ | ||
803 | |||
804 | # FIXME: The asm symlink changes when $(ARCH) changes. That's | ||
805 | # hard to detect, but I suppose "make mrproper" is a good idea | ||
806 | # before switching between archs anyway. | ||
807 | |||
808 | include/asm: | ||
809 | @echo ' SYMLINK $@ -> include/asm-$(ARCH)' | ||
810 | $(Q)if [ ! -d include ]; then mkdir -p include; fi; | ||
811 | @ln -fsn asm-$(ARCH) $@ | ||
812 | |||
813 | # Split autoconf.h into include/linux/config/* | ||
814 | |||
815 | include/config/MARKER: include/linux/autoconf.h | ||
816 | @echo ' SPLIT include/linux/autoconf.h -> include/config/*' | ||
817 | @scripts/basic/split-include include/linux/autoconf.h include/config | ||
818 | @touch $@ | ||
819 | |||
820 | # Generate some files | ||
821 | # --------------------------------------------------------------------------- | ||
822 | |||
823 | # KERNELRELEASE can change from a few different places, meaning version.h | ||
824 | # needs to be updated, so this check is forced on all builds | ||
825 | |||
826 | uts_len := 64 | ||
827 | |||
828 | define filechk_version.h | ||
829 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | ||
830 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | ||
831 | exit 1; \ | ||
832 | fi; \ | ||
833 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ | ||
834 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ | ||
835 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ | ||
836 | ) | ||
837 | endef | ||
838 | |||
839 | include/linux/version.h: $(srctree)/Makefile FORCE | ||
840 | $(call filechk,version.h) | ||
841 | |||
842 | # --------------------------------------------------------------------------- | ||
843 | |||
844 | .PHONY: depend dep | ||
845 | depend dep: | ||
846 | @echo '*** Warning: make $@ is unnecessary now.' | ||
847 | |||
848 | # --------------------------------------------------------------------------- | ||
849 | # Modules | ||
850 | |||
851 | ifdef CONFIG_MODULES | ||
852 | |||
853 | # By default, build modules as well | ||
854 | |||
855 | all: modules | ||
856 | |||
857 | # Build modules | ||
858 | |||
859 | .PHONY: modules | ||
860 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) | ||
861 | @echo ' Building modules, stage 2.'; | ||
862 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | ||
863 | |||
864 | |||
865 | # Target to prepare building external modules | ||
866 | .PHONY: modules_prepare | ||
867 | modules_prepare: prepare-all scripts | ||
868 | |||
869 | # Target to install modules | ||
870 | .PHONY: modules_install | ||
871 | modules_install: _modinst_ _modinst_post | ||
872 | |||
873 | .PHONY: _modinst_ | ||
874 | _modinst_: | ||
875 | @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \ | ||
876 | echo "Warning: you may need to install module-init-tools"; \ | ||
877 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ | ||
878 | sleep 1; \ | ||
879 | fi | ||
880 | @rm -rf $(MODLIB)/kernel | ||
881 | @rm -f $(MODLIB)/source | ||
882 | @mkdir -p $(MODLIB)/kernel | ||
883 | @ln -s $(srctree) $(MODLIB)/source | ||
884 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | ||
885 | rm -f $(MODLIB)/build ; \ | ||
886 | ln -s $(objtree) $(MODLIB)/build ; \ | ||
887 | fi | ||
888 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst | ||
889 | |||
890 | # If System.map exists, run depmod. This deliberately does not have a | ||
891 | # dependency on System.map since that would run the dependency tree on | ||
892 | # vmlinux. This depmod is only for convenience to give the initial | ||
893 | # boot a modules.dep even before / is mounted read-write. However the | ||
894 | # boot script depmod is the master version. | ||
895 | ifeq "$(strip $(INSTALL_MOD_PATH))" "" | ||
896 | depmod_opts := | ||
897 | else | ||
898 | depmod_opts := -b $(INSTALL_MOD_PATH) -r | ||
899 | endif | ||
900 | .PHONY: _modinst_post | ||
901 | _modinst_post: _modinst_ | ||
902 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi | ||
903 | |||
904 | else # CONFIG_MODULES | ||
905 | |||
906 | # Modules not configured | ||
907 | # --------------------------------------------------------------------------- | ||
908 | |||
909 | modules modules_install: FORCE | ||
910 | @echo | ||
911 | @echo "The present kernel configuration has modules disabled." | ||
912 | @echo "Type 'make config' and enable loadable module support." | ||
913 | @echo "Then build a kernel with module support enabled." | ||
914 | @echo | ||
915 | @exit 1 | ||
916 | |||
917 | endif # CONFIG_MODULES | ||
918 | |||
919 | # Generate asm-offsets.h | ||
920 | # --------------------------------------------------------------------------- | ||
921 | |||
922 | define filechk_gen-asm-offsets | ||
923 | (set -e; \ | ||
924 | echo "#ifndef __ASM_OFFSETS_H__"; \ | ||
925 | echo "#define __ASM_OFFSETS_H__"; \ | ||
926 | echo "/*"; \ | ||
927 | echo " * DO NOT MODIFY."; \ | ||
928 | echo " *"; \ | ||
929 | echo " * This file was generated by arch/$(ARCH)/Makefile"; \ | ||
930 | echo " *"; \ | ||
931 | echo " */"; \ | ||
932 | echo ""; \ | ||
933 | sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ | ||
934 | echo ""; \ | ||
935 | echo "#endif" ) | ||
936 | endef | ||
937 | |||
938 | |||
939 | ### | ||
940 | # Cleaning is done on three levels. | ||
941 | # make clean Delete most generated files | ||
942 | # Leave enough to build external modules | ||
943 | # make mrproper Delete the current configuration, and all generated files | ||
944 | # make distclean Remove editor backup files, patch leftover files and the like | ||
945 | |||
946 | # Directories & files removed with 'make clean' | ||
947 | CLEAN_DIRS += $(MODVERDIR) | ||
948 | CLEAN_FILES += vmlinux System.map \ | ||
949 | .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map | ||
950 | |||
951 | # Directories & files removed with 'make mrproper' | ||
952 | MRPROPER_DIRS += include/config include2 | ||
953 | MRPROPER_FILES += .config .config.old include/asm .version \ | ||
954 | include/linux/autoconf.h include/linux/version.h \ | ||
955 | Module.symvers tags TAGS cscope* | ||
956 | |||
957 | # clean - Delete most, but leave enough to build external modules | ||
958 | # | ||
959 | clean: rm-dirs := $(CLEAN_DIRS) | ||
960 | clean: rm-files := $(CLEAN_FILES) | ||
961 | clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs)) | ||
962 | |||
963 | .PHONY: $(clean-dirs) clean archclean | ||
964 | $(clean-dirs): | ||
965 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | ||
966 | |||
967 | clean: archclean $(clean-dirs) | ||
968 | $(call cmd,rmdirs) | ||
969 | $(call cmd,rmfiles) | ||
970 | @find . $(RCS_FIND_IGNORE) \ | ||
971 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | ||
972 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ | ||
973 | -type f -print | xargs rm -f | ||
974 | |||
975 | # mrproper - Delete all generated files, including .config | ||
976 | # | ||
977 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | ||
978 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | ||
979 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) | ||
980 | |||
981 | .PHONY: $(mrproper-dirs) mrproper archmrproper | ||
982 | $(mrproper-dirs): | ||
983 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | ||
984 | |||
985 | mrproper: clean archmrproper $(mrproper-dirs) | ||
986 | $(call cmd,rmdirs) | ||
987 | $(call cmd,rmfiles) | ||
988 | |||
989 | # distclean | ||
990 | # | ||
991 | .PHONY: distclean | ||
992 | |||
993 | distclean: mrproper | ||
994 | @find $(srctree) $(RCS_FIND_IGNORE) \ | ||
995 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | ||
996 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ | ||
997 | -o -name '.*.rej' -o -size 0 \ | ||
998 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ | ||
999 | -type f -print | xargs rm -f | ||
1000 | |||
1001 | |||
1002 | # Packaging of the kernel to various formats | ||
1003 | # --------------------------------------------------------------------------- | ||
1004 | # rpm target kept for backward compatibility | ||
1005 | package-dir := $(srctree)/scripts/package | ||
1006 | |||
1007 | .PHONY: %-pkg rpm | ||
1008 | |||
1009 | %pkg: FORCE | ||
1010 | $(Q)$(MAKE) -f $(package-dir)/Makefile $@ | ||
1011 | rpm: FORCE | ||
1012 | $(Q)$(MAKE) -f $(package-dir)/Makefile $@ | ||
1013 | |||
1014 | |||
1015 | # Brief documentation of the typical targets used | ||
1016 | # --------------------------------------------------------------------------- | ||
1017 | |||
1018 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) | ||
1019 | boards := $(notdir $(boards)) | ||
1020 | |||
1021 | help: | ||
1022 | @echo 'Cleaning targets:' | ||
1023 | @echo ' clean - remove most generated files but keep the config' | ||
1024 | @echo ' mrproper - remove all generated files + config + various backup files' | ||
1025 | @echo '' | ||
1026 | @echo 'Configuration targets:' | ||
1027 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | ||
1028 | @echo '' | ||
1029 | @echo 'Other generic targets:' | ||
1030 | @echo ' all - Build all targets marked with [*]' | ||
1031 | @echo '* vmlinux - Build the bare kernel' | ||
1032 | @echo '* modules - Build all modules' | ||
1033 | @echo ' modules_install - Install all modules' | ||
1034 | @echo ' dir/ - Build all files in dir and below' | ||
1035 | @echo ' dir/file.[ois] - Build specified target only' | ||
1036 | @echo ' rpm - Build a kernel as an RPM package' | ||
1037 | @echo ' tags/TAGS - Generate tags file for editors' | ||
1038 | @echo ' cscope - Generate cscope index' | ||
1039 | @echo '' | ||
1040 | @echo 'Static analysers' | ||
1041 | @echo ' buildcheck - List dangling references to vmlinux discarded sections' | ||
1042 | @echo ' and init sections from non-init sections' | ||
1043 | @echo ' checkstack - Generate a list of stack hogs' | ||
1044 | @echo ' namespacecheck - Name space analysis on compiled kernel' | ||
1045 | @echo '' | ||
1046 | @echo 'Kernel packaging:' | ||
1047 | @$(MAKE) -f $(package-dir)/Makefile help | ||
1048 | @echo '' | ||
1049 | @echo 'Documentation targets:' | ||
1050 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp | ||
1051 | @echo '' | ||
1052 | @echo 'Architecture specific targets ($(ARCH)):' | ||
1053 | @$(if $(archhelp),$(archhelp),\ | ||
1054 | echo ' No architecture specific help defined for $(ARCH)') | ||
1055 | @echo '' | ||
1056 | @$(if $(boards), \ | ||
1057 | $(foreach b, $(boards), \ | ||
1058 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | ||
1059 | echo '') | ||
1060 | |||
1061 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | ||
1062 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | ||
1063 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' | ||
1064 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' | ||
1065 | @echo '' | ||
1066 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | ||
1067 | @echo 'For further info see the ./README file' | ||
1068 | |||
1069 | |||
1070 | # Documentation targets | ||
1071 | # --------------------------------------------------------------------------- | ||
1072 | %docs: scripts_basic FORCE | ||
1073 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | ||
1074 | |||
1075 | else # KBUILD_EXTMOD | ||
1076 | |||
1077 | ### | ||
1078 | # External module support. | ||
1079 | # When building external modules the kernel used as basis is considered | ||
1080 | # read-only, and no consistency checks are made and the make | ||
1081 | # system is not used on the basis kernel. If updates are required | ||
1082 | # in the basis kernel ordinary make commands (without M=...) must | ||
1083 | # be used. | ||
1084 | # | ||
1085 | # The following are the only valid targets when building external | ||
1086 | # modules. | ||
1087 | # make M=dir clean Delete all automatically generated files | ||
1088 | # make M=dir modules Make all modules in specified dir | ||
1089 | # make M=dir Same as 'make M=dir modules' | ||
1090 | # make M=dir modules_install | ||
1091 | # Install the modules build in the module directory | ||
1092 | # Assumes install directory is already created | ||
1093 | |||
1094 | # We are always building modules | ||
1095 | KBUILD_MODULES := 1 | ||
1096 | .PHONY: crmodverdir | ||
1097 | crmodverdir: | ||
1098 | $(Q)mkdir -p $(MODVERDIR) | ||
1099 | |||
1100 | .PHONY: $(objtree)/Module.symvers | ||
1101 | $(objtree)/Module.symvers: | ||
1102 | @test -e $(objtree)/Module.symvers || ( \ | ||
1103 | echo; \ | ||
1104 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | ||
1105 | echo " is missing; modules will have no dependencies and modversions."; \ | ||
1106 | echo ) | ||
1107 | |||
1108 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | ||
1109 | .PHONY: $(module-dirs) modules | ||
1110 | $(module-dirs): crmodverdir $(objtree)/Module.symvers | ||
1111 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | ||
1112 | |||
1113 | modules: $(module-dirs) | ||
1114 | @echo ' Building modules, stage 2.'; | ||
1115 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | ||
1116 | |||
1117 | .PHONY: modules_install | ||
1118 | modules_install: | ||
1119 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst | ||
1120 | |||
1121 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) | ||
1122 | |||
1123 | .PHONY: $(clean-dirs) clean | ||
1124 | $(clean-dirs): | ||
1125 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | ||
1126 | |||
1127 | clean: rm-dirs := $(MODVERDIR) | ||
1128 | clean: $(clean-dirs) | ||
1129 | $(call cmd,rmdirs) | ||
1130 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ | ||
1131 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | ||
1132 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ | ||
1133 | -type f -print | xargs rm -f | ||
1134 | |||
1135 | help: | ||
1136 | @echo ' Building external modules.' | ||
1137 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | ||
1138 | @echo '' | ||
1139 | @echo ' modules - default target, build the module(s)' | ||
1140 | @echo ' modules_install - install the module' | ||
1141 | @echo ' clean - remove generated files in module directory only' | ||
1142 | @echo '' | ||
1143 | endif # KBUILD_EXTMOD | ||
1144 | |||
1145 | # Generate tags for editors | ||
1146 | # --------------------------------------------------------------------------- | ||
1147 | |||
1148 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set | ||
1149 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. | ||
1150 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! | ||
1151 | |||
1152 | ifeq ($(src),$(obj)) | ||
1153 | __srctree = | ||
1154 | else | ||
1155 | __srctree = $(srctree)/ | ||
1156 | endif | ||
1157 | |||
1158 | define all-sources | ||
1159 | ( find $(__srctree) $(RCS_FIND_IGNORE) \ | ||
1160 | \( -name include -o -name arch \) -prune -o \ | ||
1161 | -name '*.[chS]' -print; \ | ||
1162 | find $(__srctree)arch/$(ARCH) $(RCS_FIND_IGNORE) \ | ||
1163 | -name '*.[chS]' -print; \ | ||
1164 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ | ||
1165 | -name '*.[chS]' -print; \ | ||
1166 | find $(__srctree)include $(RCS_FIND_IGNORE) \ | ||
1167 | \( -name config -o -name 'asm-*' \) -prune \ | ||
1168 | -o -name '*.[chS]' -print; \ | ||
1169 | find $(__srctree)include/asm-$(ARCH) $(RCS_FIND_IGNORE) \ | ||
1170 | -name '*.[chS]' -print; \ | ||
1171 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ | ||
1172 | -name '*.[chS]' -print ) | ||
1173 | endef | ||
1174 | |||
1175 | quiet_cmd_cscope-file = FILELST cscope.files | ||
1176 | cmd_cscope-file = $(all-sources) > cscope.files | ||
1177 | |||
1178 | quiet_cmd_cscope = MAKE cscope.out | ||
1179 | cmd_cscope = cscope -k -b -q | ||
1180 | |||
1181 | cscope: FORCE | ||
1182 | $(call cmd,cscope-file) | ||
1183 | $(call cmd,cscope) | ||
1184 | |||
1185 | quiet_cmd_TAGS = MAKE $@ | ||
1186 | cmd_TAGS = $(all-sources) | etags - | ||
1187 | |||
1188 | # Exuberant ctags works better with -I | ||
1189 | |||
1190 | quiet_cmd_tags = MAKE $@ | ||
1191 | define cmd_tags | ||
1192 | rm -f $@; \ | ||
1193 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \ | ||
1194 | $(all-sources) | xargs ctags $$CTAGSF -a | ||
1195 | endef | ||
1196 | |||
1197 | TAGS: FORCE | ||
1198 | $(call cmd,TAGS) | ||
1199 | |||
1200 | tags: FORCE | ||
1201 | $(call cmd,tags) | ||
1202 | |||
1203 | |||
1204 | # Scripts to check various things for consistency | ||
1205 | # --------------------------------------------------------------------------- | ||
1206 | |||
1207 | configcheck: | ||
1208 | find * $(RCS_FIND_IGNORE) \ | ||
1209 | -name '*.[hcS]' -type f -print | sort \ | ||
1210 | | xargs $(PERL) -w scripts/checkconfig.pl | ||
1211 | |||
1212 | includecheck: | ||
1213 | find * $(RCS_FIND_IGNORE) \ | ||
1214 | -name '*.[hcS]' -type f -print | sort \ | ||
1215 | | xargs $(PERL) -w scripts/checkincludes.pl | ||
1216 | |||
1217 | versioncheck: | ||
1218 | find * $(RCS_FIND_IGNORE) \ | ||
1219 | -name '*.[hcS]' -type f -print | sort \ | ||
1220 | | xargs $(PERL) -w scripts/checkversion.pl | ||
1221 | |||
1222 | buildcheck: | ||
1223 | $(PERL) $(srctree)/scripts/reference_discarded.pl | ||
1224 | $(PERL) $(srctree)/scripts/reference_init.pl | ||
1225 | |||
1226 | namespacecheck: | ||
1227 | $(PERL) $(srctree)/scripts/namespace.pl | ||
1228 | |||
1229 | endif #ifeq ($(config-targets),1) | ||
1230 | endif #ifeq ($(mixed-targets),1) | ||
1231 | |||
1232 | .PHONY: checkstack | ||
1233 | checkstack: | ||
1234 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | ||
1235 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH) | ||
1236 | |||
1237 | kernelrelease: | ||
1238 | @echo $(KERNELRELEASE) | ||
1239 | |||
1240 | # FIXME Should go into a make.lib or something | ||
1241 | # =========================================================================== | ||
1242 | |||
1243 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | ||
1244 | cmd_rmdirs = rm -rf $(rm-dirs) | ||
1245 | |||
1246 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | ||
1247 | cmd_rmfiles = rm -f $(rm-files) | ||
1248 | |||
1249 | |||
1250 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ | ||
1251 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \ | ||
1252 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) | ||
1253 | |||
1254 | quiet_cmd_as_o_S = AS $@ | ||
1255 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | ||
1256 | |||
1257 | # read all saved command lines | ||
1258 | |||
1259 | targets := $(wildcard $(sort $(targets))) | ||
1260 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | ||
1261 | |||
1262 | ifneq ($(cmd_files),) | ||
1263 | $(cmd_files): ; # Do not try to update included dependency files | ||
1264 | include $(cmd_files) | ||
1265 | endif | ||
1266 | |||
1267 | # Execute command and generate cmd file | ||
1268 | if_changed = $(if $(strip $? \ | ||
1269 | $(filter-out $(cmd_$(1)),$(cmd_$@))\ | ||
1270 | $(filter-out $(cmd_$@),$(cmd_$(1)))),\ | ||
1271 | @set -e; \ | ||
1272 | $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ | ||
1273 | $(cmd_$(1)); \ | ||
1274 | echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd) | ||
1275 | |||
1276 | |||
1277 | # execute the command and also postprocess generated .d dependencies | ||
1278 | # file | ||
1279 | if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ | ||
1280 | $(filter-out $(cmd_$(1)),$(cmd_$@))\ | ||
1281 | $(filter-out $(cmd_$@),$(cmd_$(1)))),\ | ||
1282 | $(Q)set -e; \ | ||
1283 | $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ | ||
1284 | $(cmd_$(1)); \ | ||
1285 | scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \ | ||
1286 | rm -f $(depfile); \ | ||
1287 | mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd) | ||
1288 | |||
1289 | # Usage: $(call if_changed_rule,foo) | ||
1290 | # will check if $(cmd_foo) changed, or any of the prequisites changed, | ||
1291 | # and if so will execute $(rule_foo) | ||
1292 | |||
1293 | if_changed_rule = $(if $(strip $? \ | ||
1294 | $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\ | ||
1295 | $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\ | ||
1296 | $(Q)$(rule_$(1))) | ||
1297 | |||
1298 | # If quiet is set, only print short version of command | ||
1299 | |||
1300 | cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1)) | ||
1301 | |||
1302 | # filechk is used to check if the content of a generated file is updated. | ||
1303 | # Sample usage: | ||
1304 | # define filechk_sample | ||
1305 | # echo $KERNELRELEASE | ||
1306 | # endef | ||
1307 | # version.h : Makefile | ||
1308 | # $(call filechk,sample) | ||
1309 | # The rule defined shall write to stdout the content of the new file. | ||
1310 | # The existing file will be compared with the new one. | ||
1311 | # - If no file exist it is created | ||
1312 | # - If the content differ the new file is used | ||
1313 | # - If they are equal no change, and no timestamp update | ||
1314 | |||
1315 | define filechk | ||
1316 | @set -e; \ | ||
1317 | echo ' CHK $@'; \ | ||
1318 | mkdir -p $(dir $@); \ | ||
1319 | $(filechk_$(1)) < $< > $@.tmp; \ | ||
1320 | if [ -r $@ ] && cmp -s $@ $@.tmp; then \ | ||
1321 | rm -f $@.tmp; \ | ||
1322 | else \ | ||
1323 | echo ' UPD $@'; \ | ||
1324 | mv -f $@.tmp $@; \ | ||
1325 | fi | ||
1326 | endef | ||
1327 | |||
1328 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir | ||
1329 | # Usage: | ||
1330 | # $(Q)$(MAKE) $(build)=dir | ||
1331 | build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj | ||
1332 | |||
1333 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir | ||
1334 | # Usage: | ||
1335 | # $(Q)$(MAKE) $(clean)=dir | ||
1336 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj | ||
1337 | |||
1338 | # $(call descend,<dir>,<target>) | ||
1339 | # Recursively call a sub-make in <dir> with target <target> | ||
1340 | # Usage is deprecated, because make does not see this as an invocation of make. | ||
1341 | descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2) | ||
1342 | |||
1343 | endif # skip-makefile | ||
1344 | |||
1345 | FORCE: |