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1 | VERSION = 2 | |
2 | PATCHLEVEL = 6 | |
3 | SUBLEVEL = 35 | |
4 | EXTRAVERSION = -rc3 | |
5 | NAME = Sheep on Meth | |
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: | |
14 | # o use make's built-in rules and variables | |
15 | # (this increases performance and avoids hard-to-debug behaviour); | |
16 | # o print "Entering directory ..."; | |
17 | MAKEFLAGS += -rR --no-print-directory | |
18 | ||
19 | # Avoid funny character set dependencies | |
20 | unexport LC_ALL | |
21 | LC_COLLATE=C | |
22 | LC_NUMERIC=C | |
23 | export LC_COLLATE LC_NUMERIC | |
24 | ||
25 | # We are using a recursive build, so we need to do a little thinking | |
26 | # to get the ordering right. | |
27 | # | |
28 | # Most importantly: sub-Makefiles should only ever modify files in | |
29 | # their own directory. If in some directory we have a dependency on | |
30 | # a file in another dir (which doesn't happen often, but it's often | |
31 | # unavoidable when linking the built-in.o targets which finally | |
32 | # turn into vmlinux), we will call a sub make in that other dir, and | |
33 | # after that we are sure that everything which is in that other dir | |
34 | # is now up to date. | |
35 | # | |
36 | # The only cases where we need to modify files which have global | |
37 | # effects are thus separated out and done before the recursive | |
38 | # descending is started. They are now explicitly listed as the | |
39 | # prepare rule. | |
40 | ||
41 | # To put more focus on warnings, be less verbose as default | |
42 | # Use 'make V=1' to see the full commands | |
43 | ||
44 | ifeq ("$(origin V)", "command line") | |
45 | KBUILD_VERBOSE = $(V) | |
46 | endif | |
47 | ifndef KBUILD_VERBOSE | |
48 | KBUILD_VERBOSE = 0 | |
49 | endif | |
50 | ||
51 | # Call a source code checker (by default, "sparse") as part of the | |
52 | # C compilation. | |
53 | # | |
54 | # Use 'make C=1' to enable checking of only re-compiled files. | |
55 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
56 | # of whether they are re-compiled or not. | |
57 | # | |
58 | # See the file "Documentation/sparse.txt" for more details, including | |
59 | # where to get the "sparse" utility. | |
60 | ||
61 | ifeq ("$(origin C)", "command line") | |
62 | KBUILD_CHECKSRC = $(C) | |
63 | endif | |
64 | ifndef KBUILD_CHECKSRC | |
65 | KBUILD_CHECKSRC = 0 | |
66 | endif | |
67 | ||
68 | # Use make M=dir to specify directory of external module to build | |
69 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
70 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
71 | ifdef SUBDIRS | |
72 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
73 | endif | |
74 | ||
75 | ifeq ("$(origin M)", "command line") | |
76 | KBUILD_EXTMOD := $(M) | |
77 | endif | |
78 | ||
79 | # kbuild supports saving output files in a separate directory. | |
80 | # To locate output files in a separate directory two syntaxes are supported. | |
81 | # In both cases the working directory must be the root of the kernel src. | |
82 | # 1) O= | |
83 | # Use "make O=dir/to/store/output/files/" | |
84 | # | |
85 | # 2) Set KBUILD_OUTPUT | |
86 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
87 | # where the output files shall be placed. | |
88 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
89 | # make | |
90 | # | |
91 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
92 | # variable. | |
93 | ||
94 | ||
95 | # KBUILD_SRC is set on invocation of make in OBJ directory | |
96 | # KBUILD_SRC is not intended to be used by the regular user (for now) | |
97 | ifeq ($(KBUILD_SRC),) | |
98 | ||
99 | # OK, Make called in directory where kernel src resides | |
100 | # Do we want to locate output files in a separate directory? | |
101 | ifeq ("$(origin O)", "command line") | |
102 | KBUILD_OUTPUT := $(O) | |
103 | endif | |
104 | ||
105 | # That's our default target when none is given on the command line | |
106 | PHONY := _all | |
107 | _all: | |
108 | ||
109 | # Cancel implicit rules on top Makefile | |
110 | $(CURDIR)/Makefile Makefile: ; | |
111 | ||
112 | ifneq ($(KBUILD_OUTPUT),) | |
113 | # Invoke a second make in the output directory, passing relevant variables | |
114 | # check that the output directory actually exists | |
115 | saved-output := $(KBUILD_OUTPUT) | |
116 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) | |
117 | $(if $(KBUILD_OUTPUT),, \ | |
118 | $(error output directory "$(saved-output)" does not exist)) | |
119 | ||
120 | PHONY += $(MAKECMDGOALS) sub-make | |
121 | ||
122 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make | |
123 | $(Q)@: | |
124 | ||
125 | sub-make: FORCE | |
126 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ | |
127 | KBUILD_SRC=$(CURDIR) \ | |
128 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ | |
129 | $(filter-out _all sub-make,$(MAKECMDGOALS)) | |
130 | ||
131 | # Leave processing to above invocation of make | |
132 | skip-makefile := 1 | |
133 | endif # ifneq ($(KBUILD_OUTPUT),) | |
134 | endif # ifeq ($(KBUILD_SRC),) | |
135 | ||
136 | # We process the rest of the Makefile if this is the final invocation of make | |
137 | ifeq ($(skip-makefile),) | |
138 | ||
139 | # If building an external module we do not care about the all: rule | |
140 | # but instead _all depend on modules | |
141 | PHONY += all | |
142 | ifeq ($(KBUILD_EXTMOD),) | |
143 | _all: all | |
144 | else | |
145 | _all: modules | |
146 | endif | |
147 | ||
148 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) | |
149 | objtree := $(CURDIR) | |
150 | src := $(srctree) | |
151 | obj := $(objtree) | |
152 | ||
153 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) | |
154 | ||
155 | export srctree objtree VPATH | |
156 | ||
157 | ||
158 | # SUBARCH tells the usermode build what the underlying arch is. That is set | |
159 | # first, and if a usermode build is happening, the "ARCH=um" on the command | |
160 | # line overrides the setting of ARCH below. If a native build is happening, | |
161 | # then ARCH is assigned, getting whatever value it gets normally, and | |
162 | # SUBARCH is subsequently ignored. | |
163 | ||
164 | SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ | |
165 | -e s/arm.*/arm/ -e s/sa110/arm/ \ | |
166 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ | |
167 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ | |
168 | -e s/sh[234].*/sh/ ) | |
169 | ||
170 | # Cross compiling and selecting different set of gcc/bin-utils | |
171 | # --------------------------------------------------------------------------- | |
172 | # | |
173 | # When performing cross compilation for other architectures ARCH shall be set | |
174 | # to the target architecture. (See arch/* for the possibilities). | |
175 | # ARCH can be set during invocation of make: | |
176 | # make ARCH=ia64 | |
177 | # Another way is to have ARCH set in the environment. | |
178 | # The default ARCH is the host where make is executed. | |
179 | ||
180 | # CROSS_COMPILE specify the prefix used for all executables used | |
181 | # during compilation. Only gcc and related bin-utils executables | |
182 | # are prefixed with $(CROSS_COMPILE). | |
183 | # CROSS_COMPILE can be set on the command line | |
184 | # make CROSS_COMPILE=ia64-linux- | |
185 | # Alternatively CROSS_COMPILE can be set in the environment. | |
186 | # A third alternative is to store a setting in .config so that plain | |
187 | # "make" in the configured kernel build directory always uses that. | |
188 | # Default value for CROSS_COMPILE is not to prefix executables | |
189 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
190 | export KBUILD_BUILDHOST := $(SUBARCH) | |
191 | ARCH ?= $(SUBARCH) | |
192 | CROSS_COMPILE ?= | |
193 | CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) | |
194 | ||
195 | # Architecture as present in compile.h | |
196 | UTS_MACHINE := $(ARCH) | |
197 | SRCARCH := $(ARCH) | |
198 | ||
199 | # Additional ARCH settings for x86 | |
200 | ifeq ($(ARCH),i386) | |
201 | SRCARCH := x86 | |
202 | endif | |
203 | ifeq ($(ARCH),x86_64) | |
204 | SRCARCH := x86 | |
205 | endif | |
206 | ||
207 | # Additional ARCH settings for sparc | |
208 | ifeq ($(ARCH),sparc64) | |
209 | SRCARCH := sparc | |
210 | endif | |
211 | ||
212 | # Additional ARCH settings for sh | |
213 | ifeq ($(ARCH),sh64) | |
214 | SRCARCH := sh | |
215 | endif | |
216 | ||
217 | # Where to locate arch specific headers | |
218 | hdr-arch := $(SRCARCH) | |
219 | ||
220 | ifeq ($(ARCH),m68knommu) | |
221 | hdr-arch := m68k | |
222 | endif | |
223 | ||
224 | KCONFIG_CONFIG ?= .config | |
225 | ||
226 | # SHELL used by kbuild | |
227 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
228 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
229 | else echo sh; fi ; fi) | |
230 | ||
231 | HOSTCC = gcc | |
232 | HOSTCXX = g++ | |
233 | HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer | |
234 | HOSTCXXFLAGS = -O2 | |
235 | ||
236 | # Decide whether to build built-in, modular, or both. | |
237 | # Normally, just do built-in. | |
238 | ||
239 | KBUILD_MODULES := | |
240 | KBUILD_BUILTIN := 1 | |
241 | ||
242 | # If we have only "make modules", don't compile built-in objects. | |
243 | # When we're building modules with modversions, we need to consider | |
244 | # the built-in objects during the descend as well, in order to | |
245 | # make sure the checksums are up to date before we record them. | |
246 | ||
247 | ifeq ($(MAKECMDGOALS),modules) | |
248 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
249 | endif | |
250 | ||
251 | # If we have "make <whatever> modules", compile modules | |
252 | # in addition to whatever we do anyway. | |
253 | # Just "make" or "make all" shall build modules as well | |
254 | ||
255 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
256 | KBUILD_MODULES := 1 | |
257 | endif | |
258 | ||
259 | ifeq ($(MAKECMDGOALS),) | |
260 | KBUILD_MODULES := 1 | |
261 | endif | |
262 | ||
263 | export KBUILD_MODULES KBUILD_BUILTIN | |
264 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD | |
265 | ||
266 | # Beautify output | |
267 | # --------------------------------------------------------------------------- | |
268 | # | |
269 | # Normally, we echo the whole command before executing it. By making | |
270 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
271 | # $(quiet) to choose other forms of output instead, e.g. | |
272 | # | |
273 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
274 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
275 | # | |
276 | # If $(quiet) is empty, the whole command will be printed. | |
277 | # If it is set to "quiet_", only the short version will be printed. | |
278 | # If it is set to "silent_", nothing will be printed at all, since | |
279 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
280 | # | |
281 | # A simple variant is to prefix commands with $(Q) - that's useful | |
282 | # for commands that shall be hidden in non-verbose mode. | |
283 | # | |
284 | # $(Q)ln $@ :< | |
285 | # | |
286 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
287 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
288 | ||
289 | ifeq ($(KBUILD_VERBOSE),1) | |
290 | quiet = | |
291 | Q = | |
292 | else | |
293 | quiet=quiet_ | |
294 | Q = @ | |
295 | endif | |
296 | ||
297 | # If the user is running make -s (silent mode), suppress echoing of | |
298 | # commands | |
299 | ||
300 | ifneq ($(findstring s,$(MAKEFLAGS)),) | |
301 | quiet=silent_ | |
302 | endif | |
303 | ||
304 | export quiet Q KBUILD_VERBOSE | |
305 | ||
306 | ||
307 | # Look for make include files relative to root of kernel src | |
308 | MAKEFLAGS += --include-dir=$(srctree) | |
309 | ||
310 | # We need some generic definitions (do not try to remake the file). | |
311 | $(srctree)/scripts/Kbuild.include: ; | |
312 | include $(srctree)/scripts/Kbuild.include | |
313 | ||
314 | # Make variables (CC, etc...) | |
315 | ||
316 | AS = $(CROSS_COMPILE)as | |
317 | LD = $(CROSS_COMPILE)ld | |
318 | CC = $(CROSS_COMPILE)gcc | |
319 | CPP = $(CC) -E | |
320 | AR = $(CROSS_COMPILE)ar | |
321 | NM = $(CROSS_COMPILE)nm | |
322 | STRIP = $(CROSS_COMPILE)strip | |
323 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
324 | OBJDUMP = $(CROSS_COMPILE)objdump | |
325 | AWK = awk | |
326 | GENKSYMS = scripts/genksyms/genksyms | |
327 | INSTALLKERNEL := installkernel | |
328 | DEPMOD = /sbin/depmod | |
329 | KALLSYMS = scripts/kallsyms | |
330 | PERL = perl | |
331 | CHECK = sparse | |
332 | ||
333 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
334 | -Wbitwise -Wno-return-void $(CF) | |
335 | MODFLAGS = -DMODULE | |
336 | CFLAGS_MODULE = $(MODFLAGS) | |
337 | AFLAGS_MODULE = $(MODFLAGS) | |
338 | LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds | |
339 | CFLAGS_KERNEL = | |
340 | AFLAGS_KERNEL = | |
341 | CFLAGS_GCOV = -fprofile-arcs -ftest-coverage | |
342 | ||
343 | ||
344 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
345 | # Needed to be compatible with the O= option | |
346 | LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \ | |
347 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ | |
348 | -include include/generated/autoconf.h | |
349 | ||
350 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
351 | ||
352 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ | |
353 | -fno-strict-aliasing -fno-common \ | |
354 | -Werror-implicit-function-declaration \ | |
355 | -Wno-format-security \ | |
356 | -fno-delete-null-pointer-checks | |
357 | KBUILD_AFLAGS := -D__ASSEMBLY__ | |
358 | ||
359 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
360 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
361 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) | |
362 | ||
363 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
364 | export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC | |
365 | export CPP AR NM STRIP OBJCOPY OBJDUMP | |
366 | export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE | |
367 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | |
368 | ||
369 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS | |
370 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV | |
371 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
372 | ||
373 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
374 | # tree rather than in the kernel tree. The kernel tree might | |
375 | # even be read-only. | |
376 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
377 | ||
378 | # Files to ignore in find ... statements | |
379 | ||
380 | 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 | |
381 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
382 | ||
383 | # =========================================================================== | |
384 | # Rules shared between *config targets and build targets | |
385 | ||
386 | # Basic helpers built in scripts/ | |
387 | PHONY += scripts_basic | |
388 | scripts_basic: | |
389 | $(Q)$(MAKE) $(build)=scripts/basic | |
390 | $(Q)rm -f .tmp_quiet_recordmcount | |
391 | ||
392 | # To avoid any implicit rule to kick in, define an empty command. | |
393 | scripts/basic/%: scripts_basic ; | |
394 | ||
395 | PHONY += outputmakefile | |
396 | # outputmakefile generates a Makefile in the output directory, if using a | |
397 | # separate output directory. This allows convenient use of make in the | |
398 | # output directory. | |
399 | outputmakefile: | |
400 | ifneq ($(KBUILD_SRC),) | |
401 | $(Q)ln -fsn $(srctree) source | |
402 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ | |
403 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | |
404 | endif | |
405 | ||
406 | # To make sure we do not include .config for any of the *config targets | |
407 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
408 | # It is allowed to specify more targets when calling make, including | |
409 | # mixing *config targets and build targets. | |
410 | # For example 'make oldconfig all'. | |
411 | # Detect when mixed targets is specified, and make a second invocation | |
412 | # of make so .config is not included in this case either (for *config). | |
413 | ||
414 | no-dot-config-targets := clean mrproper distclean \ | |
415 | cscope TAGS tags help %docs check% \ | |
416 | include/linux/version.h headers_% \ | |
417 | kernelrelease kernelversion | |
418 | ||
419 | config-targets := 0 | |
420 | mixed-targets := 0 | |
421 | dot-config := 1 | |
422 | ||
423 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
424 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
425 | dot-config := 0 | |
426 | endif | |
427 | endif | |
428 | ||
429 | ifeq ($(KBUILD_EXTMOD),) | |
430 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
431 | config-targets := 1 | |
432 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) | |
433 | mixed-targets := 1 | |
434 | endif | |
435 | endif | |
436 | endif | |
437 | ||
438 | ifeq ($(mixed-targets),1) | |
439 | # =========================================================================== | |
440 | # We're called with mixed targets (*config and build targets). | |
441 | # Handle them one by one. | |
442 | ||
443 | %:: FORCE | |
444 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ | |
445 | ||
446 | else | |
447 | ifeq ($(config-targets),1) | |
448 | # =========================================================================== | |
449 | # *config targets only - make sure prerequisites are updated, and descend | |
450 | # in scripts/kconfig to make the *config target | |
451 | ||
452 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
453 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
454 | # used for 'make defconfig' | |
455 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
456 | export KBUILD_DEFCONFIG KBUILD_KCONFIG | |
457 | ||
458 | config: scripts_basic outputmakefile FORCE | |
459 | $(Q)mkdir -p include/linux include/config | |
460 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
461 | ||
462 | %config: scripts_basic outputmakefile FORCE | |
463 | $(Q)mkdir -p include/linux include/config | |
464 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
465 | ||
466 | else | |
467 | # =========================================================================== | |
468 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
469 | # targets and others. In general all targets except *config targets. | |
470 | ||
471 | ifeq ($(KBUILD_EXTMOD),) | |
472 | # Additional helpers built in scripts/ | |
473 | # Carefully list dependencies so we do not try to build scripts twice | |
474 | # in parallel | |
475 | PHONY += scripts | |
476 | scripts: scripts_basic include/config/auto.conf include/config/tristate.conf | |
477 | $(Q)$(MAKE) $(build)=$(@) | |
478 | ||
479 | # Objects we will link into vmlinux / subdirs we need to visit | |
480 | init-y := init/ | |
481 | drivers-y := drivers/ sound/ firmware/ | |
482 | net-y := net/ | |
483 | libs-y := lib/ | |
484 | core-y := usr/ | |
485 | endif # KBUILD_EXTMOD | |
486 | ||
487 | ifeq ($(dot-config),1) | |
488 | # Read in config | |
489 | -include include/config/auto.conf | |
490 | ||
491 | ifeq ($(KBUILD_EXTMOD),) | |
492 | # Read in dependencies to all Kconfig* files, make sure to run | |
493 | # oldconfig if changes are detected. | |
494 | -include include/config/auto.conf.cmd | |
495 | ||
496 | # To avoid any implicit rule to kick in, define an empty command | |
497 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; | |
498 | ||
499 | # If .config is newer than include/config/auto.conf, someone tinkered | |
500 | # with it and forgot to run make oldconfig. | |
501 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so | |
502 | # we execute the config step to be sure to catch updated Kconfig files | |
503 | include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd | |
504 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig | |
505 | else | |
506 | # external modules needs include/generated/autoconf.h and include/config/auto.conf | |
507 | # but do not care if they are up-to-date. Use auto.conf to trigger the test | |
508 | PHONY += include/config/auto.conf | |
509 | ||
510 | include/config/auto.conf: | |
511 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ | |
512 | echo; \ | |
513 | echo " ERROR: Kernel configuration is invalid."; \ | |
514 | echo " include/generated/autoconf.h or $@ are missing.";\ | |
515 | echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
516 | echo; \ | |
517 | /bin/false) | |
518 | ||
519 | endif # KBUILD_EXTMOD | |
520 | ||
521 | else | |
522 | # Dummy target needed, because used as prerequisite | |
523 | include/config/auto.conf: ; | |
524 | endif # $(dot-config) | |
525 | ||
526 | # The all: target is the default when no target is given on the | |
527 | # command line. | |
528 | # This allow a user to issue only 'make' to build a kernel including modules | |
529 | # Defaults vmlinux but it is usually overridden in the arch makefile | |
530 | all: vmlinux | |
531 | ||
532 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
533 | KBUILD_CFLAGS += -Os | |
534 | else | |
535 | KBUILD_CFLAGS += -O2 | |
536 | endif | |
537 | ||
538 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
539 | ||
540 | ifneq ($(CONFIG_FRAME_WARN),0) | |
541 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) | |
542 | endif | |
543 | ||
544 | # Force gcc to behave correct even for buggy distributions | |
545 | ifndef CONFIG_CC_STACKPROTECTOR | |
546 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) | |
547 | endif | |
548 | ||
549 | ifdef CONFIG_FRAME_POINTER | |
550 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
551 | else | |
552 | KBUILD_CFLAGS += -fomit-frame-pointer | |
553 | endif | |
554 | ||
555 | ifdef CONFIG_DEBUG_INFO | |
556 | KBUILD_CFLAGS += -g | |
557 | KBUILD_AFLAGS += -gdwarf-2 | |
558 | endif | |
559 | ||
560 | ifdef CONFIG_FUNCTION_TRACER | |
561 | KBUILD_CFLAGS += -pg | |
562 | endif | |
563 | ||
564 | # We trigger additional mismatches with less inlining | |
565 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
566 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
567 | endif | |
568 | ||
569 | # arch Makefile may override CC so keep this after arch Makefile is included | |
570 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | |
571 | CHECKFLAGS += $(NOSTDINC_FLAGS) | |
572 | ||
573 | # warn about C99 declaration after statement | |
574 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) | |
575 | ||
576 | # disable pointer signed / unsigned warnings in gcc 4.0 | |
577 | KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) | |
578 | ||
579 | # disable invalid "can't wrap" optimizations for signed / pointers | |
580 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) | |
581 | ||
582 | # conserve stack if available | |
583 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
584 | ||
585 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments | |
586 | # But warn user when we do so | |
587 | warn-assign = \ | |
588 | $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") | |
589 | ||
590 | ifneq ($(KCPPFLAGS),) | |
591 | $(call warn-assign,CPPFLAGS) | |
592 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
593 | endif | |
594 | ifneq ($(KAFLAGS),) | |
595 | $(call warn-assign,AFLAGS) | |
596 | KBUILD_AFLAGS += $(KAFLAGS) | |
597 | endif | |
598 | ifneq ($(KCFLAGS),) | |
599 | $(call warn-assign,CFLAGS) | |
600 | KBUILD_CFLAGS += $(KCFLAGS) | |
601 | endif | |
602 | ||
603 | # Use --build-id when available. | |
604 | LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ | |
605 | $(call cc-ldoption, -Wl$(comma)--build-id,)) | |
606 | LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) | |
607 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) | |
608 | ||
609 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) | |
610 | LDFLAGS_vmlinux += $(call ld-option, -X,) | |
611 | endif | |
612 | ||
613 | # Default kernel image to build when no specific target is given. | |
614 | # KBUILD_IMAGE may be overruled on the command line or | |
615 | # set in the environment | |
616 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
617 | # this default value | |
618 | export KBUILD_IMAGE ?= vmlinux | |
619 | ||
620 | # | |
621 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
622 | # images. Default is /boot, but you can set it to other values | |
623 | export INSTALL_PATH ?= /boot | |
624 | ||
625 | # | |
626 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
627 | # relocations required by build roots. This is not defined in the | |
628 | # makefile but the argument can be passed to make if needed. | |
629 | # | |
630 | ||
631 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | |
632 | export MODLIB | |
633 | ||
634 | # | |
635 | # INSTALL_MOD_STRIP, if defined, will cause modules to be | |
636 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
637 | # the default option --strip-debug will be used. Otherwise, | |
638 | # INSTALL_MOD_STRIP will used as the options to the strip command. | |
639 | ||
640 | ifdef INSTALL_MOD_STRIP | |
641 | ifeq ($(INSTALL_MOD_STRIP),1) | |
642 | mod_strip_cmd = $(STRIP) --strip-debug | |
643 | else | |
644 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) | |
645 | endif # INSTALL_MOD_STRIP=1 | |
646 | else | |
647 | mod_strip_cmd = true | |
648 | endif # INSTALL_MOD_STRIP | |
649 | export mod_strip_cmd | |
650 | ||
651 | ||
652 | ifeq ($(KBUILD_EXTMOD),) | |
653 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ | |
654 | ||
655 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
656 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
657 | $(net-y) $(net-m) $(libs-y) $(libs-m))) | |
658 | ||
659 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
660 | $(init-n) $(init-) \ | |
661 | $(core-n) $(core-) $(drivers-n) $(drivers-) \ | |
662 | $(net-n) $(net-) $(libs-n) $(libs-)))) | |
663 | ||
664 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | |
665 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | |
666 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | |
667 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | |
668 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
669 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | |
670 | libs-y := $(libs-y1) $(libs-y2) | |
671 | ||
672 | # Build vmlinux | |
673 | # --------------------------------------------------------------------------- | |
674 | # vmlinux is built from the objects selected by $(vmlinux-init) and | |
675 | # $(vmlinux-main). Most are built-in.o files from top-level directories | |
676 | # in the kernel tree, others are specified in arch/$(ARCH)/Makefile. | |
677 | # Ordering when linking is important, and $(vmlinux-init) must be first. | |
678 | # | |
679 | # vmlinux | |
680 | # ^ | |
681 | # | | |
682 | # +-< $(vmlinux-init) | |
683 | # | +--< init/version.o + more | |
684 | # | | |
685 | # +--< $(vmlinux-main) | |
686 | # | +--< driver/built-in.o mm/built-in.o + more | |
687 | # | | |
688 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) | |
689 | # | |
690 | # vmlinux version (uname -v) cannot be updated during normal | |
691 | # descending-into-subdirs phase since we do not yet know if we need to | |
692 | # update vmlinux. | |
693 | # Therefore this step is delayed until just before final link of vmlinux - | |
694 | # except in the kallsyms case where it is done just before adding the | |
695 | # symbols to the kernel. | |
696 | # | |
697 | # System.map is generated to document addresses of all kernel symbols | |
698 | ||
699 | vmlinux-init := $(head-y) $(init-y) | |
700 | vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) | |
701 | vmlinux-all := $(vmlinux-init) $(vmlinux-main) | |
702 | vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds | |
703 | export KBUILD_VMLINUX_OBJS := $(vmlinux-all) | |
704 | ||
705 | # Rule to link vmlinux - also used during CONFIG_KALLSYMS | |
706 | # May be overridden by arch/$(ARCH)/Makefile | |
707 | quiet_cmd_vmlinux__ ?= LD $@ | |
708 | cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ | |
709 | -T $(vmlinux-lds) $(vmlinux-init) \ | |
710 | --start-group $(vmlinux-main) --end-group \ | |
711 | $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) | |
712 | ||
713 | # Generate new vmlinux version | |
714 | quiet_cmd_vmlinux_version = GEN .version | |
715 | cmd_vmlinux_version = set -e; \ | |
716 | if [ ! -r .version ]; then \ | |
717 | rm -f .version; \ | |
718 | echo 1 >.version; \ | |
719 | else \ | |
720 | mv .version .old_version; \ | |
721 | expr 0$$(cat .old_version) + 1 >.version; \ | |
722 | fi; \ | |
723 | $(MAKE) $(build)=init | |
724 | ||
725 | # Generate System.map | |
726 | quiet_cmd_sysmap = SYSMAP | |
727 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap | |
728 | ||
729 | # Link of vmlinux | |
730 | # If CONFIG_KALLSYMS is set .version is already updated | |
731 | # Generate System.map and verify that the content is consistent | |
732 | # Use + in front of the vmlinux_version rule to silent warning with make -j2 | |
733 | # First command is ':' to allow us to use + in front of the rule | |
734 | define rule_vmlinux__ | |
735 | : | |
736 | $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) | |
737 | ||
738 | $(call cmd,vmlinux__) | |
739 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
740 | ||
741 | $(Q)$(if $($(quiet)cmd_sysmap), \ | |
742 | echo ' $($(quiet)cmd_sysmap) System.map' &&) \ | |
743 | $(cmd_sysmap) $@ System.map; \ | |
744 | if [ $$? -ne 0 ]; then \ | |
745 | rm -f $@; \ | |
746 | /bin/false; \ | |
747 | fi; | |
748 | $(verify_kallsyms) | |
749 | endef | |
750 | ||
751 | ||
752 | ifdef CONFIG_KALLSYMS | |
753 | # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) | |
754 | # It's a three stage process: | |
755 | # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is | |
756 | # empty | |
757 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | |
758 | # the right size - vmlinux version (uname -v) is updated during this step | |
759 | # o .tmp_vmlinux2 now has a __kallsyms section of the right size, | |
760 | # but due to the added section, some addresses have shifted. | |
761 | # From here, we generate a correct .tmp_kallsyms2.o | |
762 | # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. | |
763 | # o Verify that the System.map from vmlinux matches the map from | |
764 | # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. | |
765 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using | |
766 | # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a | |
767 | # temporary bypass to allow the kernel to be built while the | |
768 | # maintainers work out what went wrong with kallsyms. | |
769 | ||
770 | ifdef CONFIG_KALLSYMS_EXTRA_PASS | |
771 | last_kallsyms := 3 | |
772 | else | |
773 | last_kallsyms := 2 | |
774 | endif | |
775 | ||
776 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o | |
777 | ||
778 | define verify_kallsyms | |
779 | $(Q)$(if $($(quiet)cmd_sysmap), \ | |
780 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ | |
781 | $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map | |
782 | $(Q)cmp -s System.map .tmp_System.map || \ | |
783 | (echo Inconsistent kallsyms data; \ | |
784 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ | |
785 | rm .tmp_kallsyms* ; /bin/false ) | |
786 | endef | |
787 | ||
788 | # Update vmlinux version before link | |
789 | # Use + in front of this rule to silent warning about make -j1 | |
790 | # First command is ':' to allow us to use + in front of this rule | |
791 | cmd_ksym_ld = $(cmd_vmlinux__) | |
792 | define rule_ksym_ld | |
793 | : | |
794 | +$(call cmd,vmlinux_version) | |
795 | $(call cmd,vmlinux__) | |
796 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
797 | endef | |
798 | ||
799 | # Generate .S file with all kernel symbols | |
800 | quiet_cmd_kallsyms = KSYM $@ | |
801 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ | |
802 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ | |
803 | ||
804 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE | |
805 | $(call if_changed_dep,as_o_S) | |
806 | ||
807 | .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) | |
808 | $(call cmd,kallsyms) | |
809 | ||
810 | # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version | |
811 | .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE | |
812 | $(call if_changed_rule,ksym_ld) | |
813 | ||
814 | .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE | |
815 | $(call if_changed,vmlinux__) | |
816 | ||
817 | .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE | |
818 | $(call if_changed,vmlinux__) | |
819 | ||
820 | # Needs to visit scripts/ before $(KALLSYMS) can be used. | |
821 | $(KALLSYMS): scripts ; | |
822 | ||
823 | # Generate some data for debugging strange kallsyms problems | |
824 | debug_kallsyms: .tmp_map$(last_kallsyms) | |
825 | ||
826 | .tmp_map%: .tmp_vmlinux% FORCE | |
827 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ | |
828 | ||
829 | .tmp_map3: .tmp_map2 | |
830 | ||
831 | .tmp_map2: .tmp_map1 | |
832 | ||
833 | endif # ifdef CONFIG_KALLSYMS | |
834 | ||
835 | # Do modpost on a prelinked vmlinux. The finally linked vmlinux has | |
836 | # relevant sections renamed as per the linker script. | |
837 | quiet_cmd_vmlinux-modpost = LD $@ | |
838 | cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ | |
839 | $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ | |
840 | $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) | |
841 | define rule_vmlinux-modpost | |
842 | : | |
843 | +$(call cmd,vmlinux-modpost) | |
844 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ | |
845 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd | |
846 | endef | |
847 | ||
848 | # vmlinux image - including updated kernel symbols | |
849 | vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE | |
850 | ifdef CONFIG_HEADERS_CHECK | |
851 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check | |
852 | endif | |
853 | ifdef CONFIG_SAMPLES | |
854 | $(Q)$(MAKE) $(build)=samples | |
855 | endif | |
856 | ifdef CONFIG_BUILD_DOCSRC | |
857 | $(Q)$(MAKE) $(build)=Documentation | |
858 | endif | |
859 | $(call vmlinux-modpost) | |
860 | $(call if_changed_rule,vmlinux__) | |
861 | $(Q)rm -f .old_version | |
862 | ||
863 | # build vmlinux.o first to catch section mismatch errors early | |
864 | ifdef CONFIG_KALLSYMS | |
865 | .tmp_vmlinux1: vmlinux.o | |
866 | endif | |
867 | ||
868 | modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) | |
869 | vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE | |
870 | $(call if_changed_rule,vmlinux-modpost) | |
871 | ||
872 | # The actual objects are generated when descending, | |
873 | # make sure no implicit rule kicks in | |
874 | $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; | |
875 | ||
876 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
877 | # Preset locale variables to speed up the build process. Limit locale | |
878 | # tweaks to this spot to avoid wrong language settings when running | |
879 | # make menuconfig etc. | |
880 | # Error messages still appears in the original language | |
881 | ||
882 | PHONY += $(vmlinux-dirs) | |
883 | $(vmlinux-dirs): prepare scripts | |
884 | $(Q)$(MAKE) $(build)=$@ | |
885 | ||
886 | # Build the kernel release string | |
887 | # | |
888 | # The KERNELRELEASE value built here is stored in the file | |
889 | # include/config/kernel.release, and is used when executing several | |
890 | # make targets, such as "make install" or "make modules_install." | |
891 | # | |
892 | # The eventual kernel release string consists of the following fields, | |
893 | # shown in a hierarchical format to show how smaller parts are concatenated | |
894 | # to form the larger and final value, with values coming from places like | |
895 | # the Makefile, kernel config options, make command line options and/or | |
896 | # SCM tag information. | |
897 | # | |
898 | # $(KERNELVERSION) | |
899 | # $(VERSION) eg, 2 | |
900 | # $(PATCHLEVEL) eg, 6 | |
901 | # $(SUBLEVEL) eg, 18 | |
902 | # $(EXTRAVERSION) eg, -rc6 | |
903 | # $(localver-full) | |
904 | # $(localver) | |
905 | # localversion* (files without backups, containing '~') | |
906 | # $(CONFIG_LOCALVERSION) (from kernel config setting) | |
907 | # $(LOCALVERSION) (from make command line, if provided) | |
908 | # $(localver-extra) | |
909 | # $(scm-identifier) (unique SCM tag, if one exists) | |
910 | # ./scripts/setlocalversion (only with CONFIG_LOCALVERSION_AUTO) | |
911 | # .scmversion (only with CONFIG_LOCALVERSION_AUTO) | |
912 | # + (only without CONFIG_LOCALVERSION_AUTO | |
913 | # and without LOCALVERSION= and | |
914 | # repository is at non-tagged commit) | |
915 | # | |
916 | # For kernels without CONFIG_LOCALVERSION_AUTO compiled from an SCM that has | |
917 | # been revised beyond a tagged commit, `+' is appended to the version string | |
918 | # when not overridden by using "make LOCALVERSION=". This indicates that the | |
919 | # kernel is not a vanilla release version and has been modified. | |
920 | ||
921 | pattern = ".*/localversion[^~]*" | |
922 | string = $(shell cat /dev/null \ | |
923 | `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) | |
924 | ||
925 | localver = $(subst $(space),, $(string) \ | |
926 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) | |
927 | ||
928 | # scripts/setlocalversion is called to create a unique identifier if the source | |
929 | # is managed by a known SCM and the repository has been revised since the last | |
930 | # tagged (release) commit. The format of the identifier is determined by the | |
931 | # SCM's implementation. | |
932 | # | |
933 | # .scmversion is used when generating rpm packages so we do not loose | |
934 | # the version information from the SCM when we do the build of the kernel | |
935 | # from the copied source | |
936 | ifeq ($(wildcard .scmversion),) | |
937 | scm-identifier = $(shell $(CONFIG_SHELL) \ | |
938 | $(srctree)/scripts/setlocalversion $(srctree)) | |
939 | else | |
940 | scm-identifier = $(shell cat .scmversion 2> /dev/null) | |
941 | endif | |
942 | ||
943 | ifdef CONFIG_LOCALVERSION_AUTO | |
944 | localver-extra = $(scm-identifier) | |
945 | else | |
946 | ifneq ($(scm-identifier),) | |
947 | ifeq ($(LOCALVERSION),) | |
948 | localver-extra = + | |
949 | endif | |
950 | endif | |
951 | endif | |
952 | ||
953 | localver-full = $(localver)$(LOCALVERSION)$(localver-extra) | |
954 | ||
955 | # Store (new) KERNELRELASE string in include/config/kernel.release | |
956 | kernelrelease = $(KERNELVERSION)$(localver-full) | |
957 | include/config/kernel.release: include/config/auto.conf FORCE | |
958 | $(Q)rm -f $@ | |
959 | $(Q)echo $(kernelrelease) > $@ | |
960 | ||
961 | ||
962 | # Things we need to do before we recursively start building the kernel | |
963 | # or the modules are listed in "prepare". | |
964 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
965 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
966 | # version.h and scripts_basic is processed / created. | |
967 | ||
968 | # Listed in dependency order | |
969 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 | |
970 | ||
971 | # prepare3 is used to check if we are building in a separate output directory, | |
972 | # and if so do: | |
973 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
974 | prepare3: include/config/kernel.release | |
975 | ifneq ($(KBUILD_SRC),) | |
976 | @$(kecho) ' Using $(srctree) as source for kernel' | |
977 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ | |
978 | echo " $(srctree) is not clean, please run 'make mrproper'";\ | |
979 | echo " in the '$(srctree)' directory.";\ | |
980 | /bin/false; \ | |
981 | fi; | |
982 | endif | |
983 | ||
984 | # prepare2 creates a makefile if using a separate output directory | |
985 | prepare2: prepare3 outputmakefile | |
986 | ||
987 | prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ | |
988 | include/config/auto.conf | |
989 | $(cmd_crmodverdir) | |
990 | ||
991 | archprepare: prepare1 scripts_basic | |
992 | ||
993 | prepare0: archprepare FORCE | |
994 | $(Q)$(MAKE) $(build)=. | |
995 | $(Q)$(MAKE) $(build)=. missing-syscalls | |
996 | ||
997 | # All the preparing.. | |
998 | prepare: prepare0 | |
999 | ||
1000 | # Generate some files | |
1001 | # --------------------------------------------------------------------------- | |
1002 | ||
1003 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1004 | # needs to be updated, so this check is forced on all builds | |
1005 | ||
1006 | uts_len := 64 | |
1007 | define filechk_utsrelease.h | |
1008 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1009 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1010 | exit 1; \ | |
1011 | fi; \ | |
1012 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) | |
1013 | endef | |
1014 | ||
1015 | define filechk_version.h | |
1016 | (echo \#define LINUX_VERSION_CODE $(shell \ | |
1017 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ | |
1018 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) | |
1019 | endef | |
1020 | ||
1021 | include/linux/version.h: $(srctree)/Makefile FORCE | |
1022 | $(call filechk,version.h) | |
1023 | ||
1024 | include/generated/utsrelease.h: include/config/kernel.release FORCE | |
1025 | $(call filechk,utsrelease.h) | |
1026 | ||
1027 | PHONY += headerdep | |
1028 | headerdep: | |
1029 | $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl | |
1030 | ||
1031 | # --------------------------------------------------------------------------- | |
1032 | ||
1033 | PHONY += depend dep | |
1034 | depend dep: | |
1035 | @echo '*** Warning: make $@ is unnecessary now.' | |
1036 | ||
1037 | # --------------------------------------------------------------------------- | |
1038 | # Firmware install | |
1039 | INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware | |
1040 | export INSTALL_FW_PATH | |
1041 | ||
1042 | PHONY += firmware_install | |
1043 | firmware_install: FORCE | |
1044 | @mkdir -p $(objtree)/firmware | |
1045 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install | |
1046 | ||
1047 | # --------------------------------------------------------------------------- | |
1048 | # Kernel headers | |
1049 | ||
1050 | #Default location for installed headers | |
1051 | export INSTALL_HDR_PATH = $(objtree)/usr | |
1052 | ||
1053 | hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj | |
1054 | ||
1055 | # If we do an all arch process set dst to asm-$(hdr-arch) | |
1056 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) | |
1057 | ||
1058 | PHONY += __headers | |
1059 | __headers: include/linux/version.h scripts_basic FORCE | |
1060 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1061 | ||
1062 | PHONY += headers_install_all | |
1063 | headers_install_all: | |
1064 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
1065 | ||
1066 | PHONY += headers_install | |
1067 | headers_install: __headers | |
1068 | $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ | |
1069 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
1070 | $(Q)$(MAKE) $(hdr-inst)=include | |
1071 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) | |
1072 | ||
1073 | PHONY += headers_check_all | |
1074 | headers_check_all: headers_install_all | |
1075 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check | |
1076 | ||
1077 | PHONY += headers_check | |
1078 | headers_check: headers_install | |
1079 | $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 | |
1080 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 | |
1081 | ||
1082 | # --------------------------------------------------------------------------- | |
1083 | # Modules | |
1084 | ||
1085 | ifdef CONFIG_MODULES | |
1086 | ||
1087 | # By default, build modules as well | |
1088 | ||
1089 | all: modules | |
1090 | ||
1091 | # Build modules | |
1092 | # | |
1093 | # A module can be listed more than once in obj-m resulting in | |
1094 | # duplicate lines in modules.order files. Those are removed | |
1095 | # using awk while concatenating to the final file. | |
1096 | ||
1097 | PHONY += modules | |
1098 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin | |
1099 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order | |
1100 | @$(kecho) ' Building modules, stage 2.'; | |
1101 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1102 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild | |
1103 | ||
1104 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) | |
1105 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1106 | ||
1107 | %/modules.builtin: include/config/auto.conf | |
1108 | $(Q)$(MAKE) $(modbuiltin)=$* | |
1109 | ||
1110 | ||
1111 | # Target to prepare building external modules | |
1112 | PHONY += modules_prepare | |
1113 | modules_prepare: prepare scripts | |
1114 | ||
1115 | # Target to install modules | |
1116 | PHONY += modules_install | |
1117 | modules_install: _modinst_ _modinst_post | |
1118 | ||
1119 | PHONY += _modinst_ | |
1120 | _modinst_: | |
1121 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ | |
1122 | echo "Warning: you may need to install module-init-tools"; \ | |
1123 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ | |
1124 | sleep 1; \ | |
1125 | fi | |
1126 | @rm -rf $(MODLIB)/kernel | |
1127 | @rm -f $(MODLIB)/source | |
1128 | @mkdir -p $(MODLIB)/kernel | |
1129 | @ln -s $(srctree) $(MODLIB)/source | |
1130 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
1131 | rm -f $(MODLIB)/build ; \ | |
1132 | ln -s $(objtree) $(MODLIB)/build ; \ | |
1133 | fi | |
1134 | @cp -f $(objtree)/modules.order $(MODLIB)/ | |
1135 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ | |
1136 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1137 | ||
1138 | # This depmod is only for convenience to give the initial | |
1139 | # boot a modules.dep even before / is mounted read-write. However the | |
1140 | # boot script depmod is the master version. | |
1141 | PHONY += _modinst_post | |
1142 | _modinst_post: _modinst_ | |
1143 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst | |
1144 | $(call cmd,depmod) | |
1145 | ||
1146 | else # CONFIG_MODULES | |
1147 | ||
1148 | # Modules not configured | |
1149 | # --------------------------------------------------------------------------- | |
1150 | ||
1151 | modules modules_install: FORCE | |
1152 | @echo | |
1153 | @echo "The present kernel configuration has modules disabled." | |
1154 | @echo "Type 'make config' and enable loadable module support." | |
1155 | @echo "Then build a kernel with module support enabled." | |
1156 | @echo | |
1157 | @exit 1 | |
1158 | ||
1159 | endif # CONFIG_MODULES | |
1160 | ||
1161 | ### | |
1162 | # Cleaning is done on three levels. | |
1163 | # make clean Delete most generated files | |
1164 | # Leave enough to build external modules | |
1165 | # make mrproper Delete the current configuration, and all generated files | |
1166 | # make distclean Remove editor backup files, patch leftover files and the like | |
1167 | ||
1168 | # Directories & files removed with 'make clean' | |
1169 | CLEAN_DIRS += $(MODVERDIR) | |
1170 | CLEAN_FILES += vmlinux System.map \ | |
1171 | .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map | |
1172 | ||
1173 | # Directories & files removed with 'make mrproper' | |
1174 | MRPROPER_DIRS += include/config usr/include include/generated | |
1175 | MRPROPER_FILES += .config .config.old .version .old_version \ | |
1176 | include/linux/version.h \ | |
1177 | Module.symvers tags TAGS cscope* | |
1178 | ||
1179 | # clean - Delete most, but leave enough to build external modules | |
1180 | # | |
1181 | clean: rm-dirs := $(CLEAN_DIRS) | |
1182 | clean: rm-files := $(CLEAN_FILES) | |
1183 | clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) | |
1184 | ||
1185 | PHONY += $(clean-dirs) clean archclean | |
1186 | $(clean-dirs): | |
1187 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1188 | ||
1189 | clean: archclean $(clean-dirs) | |
1190 | $(call cmd,rmdirs) | |
1191 | $(call cmd,rmfiles) | |
1192 | @find . $(RCS_FIND_IGNORE) \ | |
1193 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1194 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1195 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1196 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
1197 | -o -name '*.gcno' \) -type f -print | xargs rm -f | |
1198 | ||
1199 | # mrproper - Delete all generated files, including .config | |
1200 | # | |
1201 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1202 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1203 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) | |
1204 | ||
1205 | PHONY += $(mrproper-dirs) mrproper archmrproper | |
1206 | $(mrproper-dirs): | |
1207 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1208 | ||
1209 | mrproper: clean archmrproper $(mrproper-dirs) | |
1210 | $(call cmd,rmdirs) | |
1211 | $(call cmd,rmfiles) | |
1212 | ||
1213 | # distclean | |
1214 | # | |
1215 | PHONY += distclean | |
1216 | ||
1217 | distclean: mrproper | |
1218 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
1219 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1220 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ | |
1221 | -o -name '.*.rej' -o -size 0 \ | |
1222 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ | |
1223 | -type f -print | xargs rm -f | |
1224 | ||
1225 | ||
1226 | # Packaging of the kernel to various formats | |
1227 | # --------------------------------------------------------------------------- | |
1228 | # rpm target kept for backward compatibility | |
1229 | package-dir := $(srctree)/scripts/package | |
1230 | ||
1231 | %pkg: include/config/kernel.release FORCE | |
1232 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1233 | rpm: include/config/kernel.release FORCE | |
1234 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1235 | ||
1236 | ||
1237 | # Brief documentation of the typical targets used | |
1238 | # --------------------------------------------------------------------------- | |
1239 | ||
1240 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) | |
1241 | boards := $(notdir $(boards)) | |
1242 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) | |
1243 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1244 | ||
1245 | help: | |
1246 | @echo 'Cleaning targets:' | |
1247 | @echo ' clean - Remove most generated files but keep the config and' | |
1248 | @echo ' enough build support to build external modules' | |
1249 | @echo ' mrproper - Remove all generated files + config + various backup files' | |
1250 | @echo ' distclean - mrproper + remove editor backup and patch files' | |
1251 | @echo '' | |
1252 | @echo 'Configuration targets:' | |
1253 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1254 | @echo '' | |
1255 | @echo 'Other generic targets:' | |
1256 | @echo ' all - Build all targets marked with [*]' | |
1257 | @echo '* vmlinux - Build the bare kernel' | |
1258 | @echo '* modules - Build all modules' | |
1259 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' | |
1260 | @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' | |
1261 | @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' | |
1262 | @echo ' dir/ - Build all files in dir and below' | |
1263 | @echo ' dir/file.[oisS] - Build specified target only' | |
1264 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1265 | @echo ' (requires a recent binutils and recent build (System.map))' | |
1266 | @echo ' dir/file.ko - Build module including final link' | |
1267 | @echo ' modules_prepare - Set up for building external modules' | |
1268 | @echo ' tags/TAGS - Generate tags file for editors' | |
1269 | @echo ' cscope - Generate cscope index' | |
1270 | @echo ' kernelrelease - Output the release version string' | |
1271 | @echo ' kernelversion - Output the version stored in Makefile' | |
1272 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ | |
1273 | echo ' (default: $(INSTALL_HDR_PATH))'; \ | |
1274 | echo '' | |
1275 | @echo 'Static analysers' | |
1276 | @echo ' checkstack - Generate a list of stack hogs' | |
1277 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
1278 | @echo ' versioncheck - Sanity check on version.h usage' | |
1279 | @echo ' includecheck - Check for duplicate included header files' | |
1280 | @echo ' export_report - List the usages of all exported symbols' | |
1281 | @echo ' headers_check - Sanity check on exported headers' | |
1282 | @echo ' headerdep - Detect inclusion cycles in headers'; \ | |
1283 | echo '' | |
1284 | @echo 'Kernel packaging:' | |
1285 | @$(MAKE) $(build)=$(package-dir) help | |
1286 | @echo '' | |
1287 | @echo 'Documentation targets:' | |
1288 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp | |
1289 | @echo '' | |
1290 | @echo 'Architecture specific targets ($(SRCARCH)):' | |
1291 | @$(if $(archhelp),$(archhelp),\ | |
1292 | echo ' No architecture specific help defined for $(SRCARCH)') | |
1293 | @echo '' | |
1294 | @$(if $(boards), \ | |
1295 | $(foreach b, $(boards), \ | |
1296 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1297 | echo '') | |
1298 | @$(if $(board-dirs), \ | |
1299 | $(foreach b, $(board-dirs), \ | |
1300 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1301 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1302 | echo '') | |
1303 | ||
1304 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
1305 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' | |
1306 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1307 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' | |
1308 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1309 | @echo '' | |
1310 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1311 | @echo 'For further info see the ./README file' | |
1312 | ||
1313 | ||
1314 | help-board-dirs := $(addprefix help-,$(board-dirs)) | |
1315 | ||
1316 | help-boards: $(help-board-dirs) | |
1317 | ||
1318 | boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) | |
1319 | ||
1320 | $(help-board-dirs): help-%: | |
1321 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1322 | @$(if $(boards-per-dir), \ | |
1323 | $(foreach b, $(boards-per-dir), \ | |
1324 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1325 | echo '') | |
1326 | ||
1327 | ||
1328 | # Documentation targets | |
1329 | # --------------------------------------------------------------------------- | |
1330 | %docs: scripts_basic FORCE | |
1331 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | |
1332 | ||
1333 | else # KBUILD_EXTMOD | |
1334 | ||
1335 | ### | |
1336 | # External module support. | |
1337 | # When building external modules the kernel used as basis is considered | |
1338 | # read-only, and no consistency checks are made and the make | |
1339 | # system is not used on the basis kernel. If updates are required | |
1340 | # in the basis kernel ordinary make commands (without M=...) must | |
1341 | # be used. | |
1342 | # | |
1343 | # The following are the only valid targets when building external | |
1344 | # modules. | |
1345 | # make M=dir clean Delete all automatically generated files | |
1346 | # make M=dir modules Make all modules in specified dir | |
1347 | # make M=dir Same as 'make M=dir modules' | |
1348 | # make M=dir modules_install | |
1349 | # Install the modules built in the module directory | |
1350 | # Assumes install directory is already created | |
1351 | ||
1352 | # We are always building modules | |
1353 | KBUILD_MODULES := 1 | |
1354 | PHONY += crmodverdir | |
1355 | crmodverdir: | |
1356 | $(cmd_crmodverdir) | |
1357 | ||
1358 | PHONY += $(objtree)/Module.symvers | |
1359 | $(objtree)/Module.symvers: | |
1360 | @test -e $(objtree)/Module.symvers || ( \ | |
1361 | echo; \ | |
1362 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1363 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1364 | echo ) | |
1365 | ||
1366 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
1367 | PHONY += $(module-dirs) modules | |
1368 | $(module-dirs): crmodverdir $(objtree)/Module.symvers | |
1369 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1370 | ||
1371 | modules: $(module-dirs) | |
1372 | @$(kecho) ' Building modules, stage 2.'; | |
1373 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1374 | ||
1375 | PHONY += modules_install | |
1376 | modules_install: _emodinst_ _emodinst_post | |
1377 | ||
1378 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) | |
1379 | PHONY += _emodinst_ | |
1380 | _emodinst_: | |
1381 | $(Q)mkdir -p $(MODLIB)/$(install-dir) | |
1382 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1383 | ||
1384 | PHONY += _emodinst_post | |
1385 | _emodinst_post: _emodinst_ | |
1386 | $(call cmd,depmod) | |
1387 | ||
1388 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) | |
1389 | ||
1390 | PHONY += $(clean-dirs) clean | |
1391 | $(clean-dirs): | |
1392 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1393 | ||
1394 | clean: rm-dirs := $(MODVERDIR) | |
1395 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ | |
1396 | $(KBUILD_EXTMOD)/modules.order \ | |
1397 | $(KBUILD_EXTMOD)/modules.builtin | |
1398 | clean: $(clean-dirs) | |
1399 | $(call cmd,rmdirs) | |
1400 | $(call cmd,rmfiles) | |
1401 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ | |
1402 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1403 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1404 | -o -name '*.gcno' \) -type f -print | xargs rm -f | |
1405 | ||
1406 | help: | |
1407 | @echo ' Building external modules.' | |
1408 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1409 | @echo '' | |
1410 | @echo ' modules - default target, build the module(s)' | |
1411 | @echo ' modules_install - install the module' | |
1412 | @echo ' clean - remove generated files in module directory only' | |
1413 | @echo '' | |
1414 | ||
1415 | # Dummies... | |
1416 | PHONY += prepare scripts | |
1417 | prepare: ; | |
1418 | scripts: ; | |
1419 | endif # KBUILD_EXTMOD | |
1420 | ||
1421 | # Generate tags for editors | |
1422 | # --------------------------------------------------------------------------- | |
1423 | quiet_cmd_tags = GEN $@ | |
1424 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1425 | ||
1426 | tags TAGS cscope: FORCE | |
1427 | $(call cmd,tags) | |
1428 | ||
1429 | # Scripts to check various things for consistency | |
1430 | # --------------------------------------------------------------------------- | |
1431 | ||
1432 | includecheck: | |
1433 | find * $(RCS_FIND_IGNORE) \ | |
1434 | -name '*.[hcS]' -type f -print | sort \ | |
1435 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
1436 | ||
1437 | versioncheck: | |
1438 | find * $(RCS_FIND_IGNORE) \ | |
1439 | -name '*.[hcS]' -type f -print | sort \ | |
1440 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
1441 | ||
1442 | namespacecheck: | |
1443 | $(PERL) $(srctree)/scripts/namespace.pl | |
1444 | ||
1445 | export_report: | |
1446 | $(PERL) $(srctree)/scripts/export_report.pl | |
1447 | ||
1448 | endif #ifeq ($(config-targets),1) | |
1449 | endif #ifeq ($(mixed-targets),1) | |
1450 | ||
1451 | PHONY += checkstack kernelrelease kernelversion | |
1452 | ||
1453 | # UML needs a little special treatment here. It wants to use the host | |
1454 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1455 | # else wants $(ARCH), including people doing cross-builds, which means | |
1456 | # that $(SUBARCH) doesn't work here. | |
1457 | ifeq ($(ARCH), um) | |
1458 | CHECKSTACK_ARCH := $(SUBARCH) | |
1459 | else | |
1460 | CHECKSTACK_ARCH := $(ARCH) | |
1461 | endif | |
1462 | checkstack: | |
1463 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
1464 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) | |
1465 | ||
1466 | kernelrelease: | |
1467 | $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ | |
1468 | $(error kernelrelease not valid - run 'make prepare' to update it)) | |
1469 | kernelversion: | |
1470 | @echo $(KERNELVERSION) | |
1471 | ||
1472 | # Single targets | |
1473 | # --------------------------------------------------------------------------- | |
1474 | # Single targets are compatible with: | |
1475 | # - build with mixed source and output | |
1476 | # - build with separate output dir 'make O=...' | |
1477 | # - external modules | |
1478 | # | |
1479 | # target-dir => where to store outputfile | |
1480 | # build-dir => directory in kernel source tree to use | |
1481 | ||
1482 | ifeq ($(KBUILD_EXTMOD),) | |
1483 | build-dir = $(patsubst %/,%,$(dir $@)) | |
1484 | target-dir = $(dir $@) | |
1485 | else | |
1486 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1487 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1488 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1489 | endif | |
1490 | ||
1491 | %.s: %.c prepare scripts FORCE | |
1492 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1493 | %.i: %.c prepare scripts FORCE | |
1494 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1495 | %.o: %.c prepare scripts FORCE | |
1496 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1497 | %.lst: %.c prepare scripts FORCE | |
1498 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1499 | %.s: %.S prepare scripts FORCE | |
1500 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1501 | %.o: %.S prepare scripts FORCE | |
1502 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1503 | %.symtypes: %.c prepare scripts FORCE | |
1504 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1505 | ||
1506 | # Modules | |
1507 | /: prepare scripts FORCE | |
1508 | $(cmd_crmodverdir) | |
1509 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1510 | $(build)=$(build-dir) | |
1511 | %/: prepare scripts FORCE | |
1512 | $(cmd_crmodverdir) | |
1513 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1514 | $(build)=$(build-dir) | |
1515 | %.ko: prepare scripts FORCE | |
1516 | $(cmd_crmodverdir) | |
1517 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1518 | $(build)=$(build-dir) $(@:.ko=.o) | |
1519 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1520 | ||
1521 | # FIXME Should go into a make.lib or something | |
1522 | # =========================================================================== | |
1523 | ||
1524 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1525 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1526 | ||
1527 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1528 | cmd_rmfiles = rm -f $(rm-files) | |
1529 | ||
1530 | # Run depmod only if we have System.map and depmod is executable | |
1531 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | |
1532 | cmd_depmod = \ | |
1533 | if [ -r System.map -a -x $(DEPMOD) ]; then \ | |
1534 | $(DEPMOD) -ae -F System.map \ | |
1535 | $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ | |
1536 | $(KERNELRELEASE); \ | |
1537 | fi | |
1538 | ||
1539 | # Create temporary dir for module support files | |
1540 | # clean it up only when building all modules | |
1541 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1542 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1543 | ||
1544 | a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ | |
1545 | $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ | |
1546 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) | |
1547 | ||
1548 | quiet_cmd_as_o_S = AS $@ | |
1549 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
1550 | ||
1551 | # read all saved command lines | |
1552 | ||
1553 | targets := $(wildcard $(sort $(targets))) | |
1554 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
1555 | ||
1556 | ifneq ($(cmd_files),) | |
1557 | $(cmd_files): ; # Do not try to update included dependency files | |
1558 | include $(cmd_files) | |
1559 | endif | |
1560 | ||
1561 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir | |
1562 | # Usage: | |
1563 | # $(Q)$(MAKE) $(clean)=dir | |
1564 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj | |
1565 | ||
1566 | endif # skip-makefile | |
1567 | ||
1568 | PHONY += FORCE | |
1569 | FORCE: | |
1570 | ||
1571 | # Declare the contents of the .PHONY variable as phony. We keep that | |
1572 | # information in a variable so we can use it in if_changed and friends. | |
1573 | .PHONY: $(PHONY) |