]>
Commit | Line | Data |
---|---|---|
1 | VERSION = 3 | |
2 | PATCHLEVEL = 8 | |
3 | SUBLEVEL = 0 | |
4 | EXTRAVERSION = | |
5 | NAME = Unicycling Gorilla | |
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 := $(O) | |
103 | endif | |
104 | ||
105 | ifeq ("$(origin W)", "command line") | |
106 | export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) | |
107 | endif | |
108 | ||
109 | # That's our default target when none is given on the command line | |
110 | PHONY := _all | |
111 | _all: | |
112 | ||
113 | # Cancel implicit rules on top Makefile | |
114 | $(CURDIR)/Makefile Makefile: ; | |
115 | ||
116 | ifneq ($(KBUILD_OUTPUT),) | |
117 | # Invoke a second make in the output directory, passing relevant variables | |
118 | # check that the output directory actually exists | |
119 | saved-output := $(KBUILD_OUTPUT) | |
120 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) | |
121 | $(if $(KBUILD_OUTPUT),, \ | |
122 | $(error output directory "$(saved-output)" does not exist)) | |
123 | ||
124 | PHONY += $(MAKECMDGOALS) sub-make | |
125 | ||
126 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make | |
127 | @: | |
128 | ||
129 | sub-make: FORCE | |
130 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ | |
131 | KBUILD_SRC=$(CURDIR) \ | |
132 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ | |
133 | $(filter-out _all sub-make,$(MAKECMDGOALS)) | |
134 | ||
135 | # Leave processing to above invocation of make | |
136 | skip-makefile := 1 | |
137 | endif # ifneq ($(KBUILD_OUTPUT),) | |
138 | endif # ifeq ($(KBUILD_SRC),) | |
139 | ||
140 | # We process the rest of the Makefile if this is the final invocation of make | |
141 | ifeq ($(skip-makefile),) | |
142 | ||
143 | # If building an external module we do not care about the all: rule | |
144 | # but instead _all depend on modules | |
145 | PHONY += all | |
146 | ifeq ($(KBUILD_EXTMOD),) | |
147 | _all: all | |
148 | else | |
149 | _all: modules | |
150 | endif | |
151 | ||
152 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) | |
153 | objtree := $(CURDIR) | |
154 | src := $(srctree) | |
155 | obj := $(objtree) | |
156 | ||
157 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) | |
158 | ||
159 | export srctree objtree VPATH | |
160 | ||
161 | ||
162 | # SUBARCH tells the usermode build what the underlying arch is. That is set | |
163 | # first, and if a usermode build is happening, the "ARCH=um" on the command | |
164 | # line overrides the setting of ARCH below. If a native build is happening, | |
165 | # then ARCH is assigned, getting whatever value it gets normally, and | |
166 | # SUBARCH is subsequently ignored. | |
167 | ||
168 | SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ | |
169 | -e s/sun4u/sparc64/ \ | |
170 | -e s/arm.*/arm/ -e s/sa110/arm/ \ | |
171 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ | |
172 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ | |
173 | -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) | |
174 | ||
175 | # Cross compiling and selecting different set of gcc/bin-utils | |
176 | # --------------------------------------------------------------------------- | |
177 | # | |
178 | # When performing cross compilation for other architectures ARCH shall be set | |
179 | # to the target architecture. (See arch/* for the possibilities). | |
180 | # ARCH can be set during invocation of make: | |
181 | # make ARCH=ia64 | |
182 | # Another way is to have ARCH set in the environment. | |
183 | # The default ARCH is the host where make is executed. | |
184 | ||
185 | # CROSS_COMPILE specify the prefix used for all executables used | |
186 | # during compilation. Only gcc and related bin-utils executables | |
187 | # are prefixed with $(CROSS_COMPILE). | |
188 | # CROSS_COMPILE can be set on the command line | |
189 | # make CROSS_COMPILE=ia64-linux- | |
190 | # Alternatively CROSS_COMPILE can be set in the environment. | |
191 | # A third alternative is to store a setting in .config so that plain | |
192 | # "make" in the configured kernel build directory always uses that. | |
193 | # Default value for CROSS_COMPILE is not to prefix executables | |
194 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
195 | export KBUILD_BUILDHOST := $(SUBARCH) | |
196 | ARCH ?= $(SUBARCH) | |
197 | CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) | |
198 | ||
199 | # Architecture as present in compile.h | |
200 | UTS_MACHINE := $(ARCH) | |
201 | SRCARCH := $(ARCH) | |
202 | ||
203 | # Additional ARCH settings for x86 | |
204 | ifeq ($(ARCH),i386) | |
205 | SRCARCH := x86 | |
206 | endif | |
207 | ifeq ($(ARCH),x86_64) | |
208 | SRCARCH := x86 | |
209 | endif | |
210 | ||
211 | # Additional ARCH settings for sparc | |
212 | ifeq ($(ARCH),sparc32) | |
213 | SRCARCH := sparc | |
214 | endif | |
215 | ifeq ($(ARCH),sparc64) | |
216 | SRCARCH := sparc | |
217 | endif | |
218 | ||
219 | # Additional ARCH settings for sh | |
220 | ifeq ($(ARCH),sh64) | |
221 | SRCARCH := sh | |
222 | endif | |
223 | ||
224 | # Additional ARCH settings for tile | |
225 | ifeq ($(ARCH),tilepro) | |
226 | SRCARCH := tile | |
227 | endif | |
228 | ifeq ($(ARCH),tilegx) | |
229 | SRCARCH := tile | |
230 | endif | |
231 | ||
232 | # Where to locate arch specific headers | |
233 | hdr-arch := $(SRCARCH) | |
234 | ||
235 | KCONFIG_CONFIG ?= .config | |
236 | export KCONFIG_CONFIG | |
237 | ||
238 | # SHELL used by kbuild | |
239 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
240 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
241 | else echo sh; fi ; fi) | |
242 | ||
243 | HOSTCC = gcc | |
244 | HOSTCXX = g++ | |
245 | HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer | |
246 | HOSTCXXFLAGS = -O2 | |
247 | ||
248 | # Decide whether to build built-in, modular, or both. | |
249 | # Normally, just do built-in. | |
250 | ||
251 | KBUILD_MODULES := | |
252 | KBUILD_BUILTIN := 1 | |
253 | ||
254 | # If we have only "make modules", don't compile built-in objects. | |
255 | # When we're building modules with modversions, we need to consider | |
256 | # the built-in objects during the descend as well, in order to | |
257 | # make sure the checksums are up to date before we record them. | |
258 | ||
259 | ifeq ($(MAKECMDGOALS),modules) | |
260 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
261 | endif | |
262 | ||
263 | # If we have "make <whatever> modules", compile modules | |
264 | # in addition to whatever we do anyway. | |
265 | # Just "make" or "make all" shall build modules as well | |
266 | ||
267 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
268 | KBUILD_MODULES := 1 | |
269 | endif | |
270 | ||
271 | ifeq ($(MAKECMDGOALS),) | |
272 | KBUILD_MODULES := 1 | |
273 | endif | |
274 | ||
275 | export KBUILD_MODULES KBUILD_BUILTIN | |
276 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD | |
277 | ||
278 | # Beautify output | |
279 | # --------------------------------------------------------------------------- | |
280 | # | |
281 | # Normally, we echo the whole command before executing it. By making | |
282 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
283 | # $(quiet) to choose other forms of output instead, e.g. | |
284 | # | |
285 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
286 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
287 | # | |
288 | # If $(quiet) is empty, the whole command will be printed. | |
289 | # If it is set to "quiet_", only the short version will be printed. | |
290 | # If it is set to "silent_", nothing will be printed at all, since | |
291 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
292 | # | |
293 | # A simple variant is to prefix commands with $(Q) - that's useful | |
294 | # for commands that shall be hidden in non-verbose mode. | |
295 | # | |
296 | # $(Q)ln $@ :< | |
297 | # | |
298 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
299 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
300 | ||
301 | ifeq ($(KBUILD_VERBOSE),1) | |
302 | quiet = | |
303 | Q = | |
304 | else | |
305 | quiet=quiet_ | |
306 | Q = @ | |
307 | endif | |
308 | ||
309 | # If the user is running make -s (silent mode), suppress echoing of | |
310 | # commands | |
311 | ||
312 | ifneq ($(filter s% -s%,$(MAKEFLAGS)),) | |
313 | quiet=silent_ | |
314 | endif | |
315 | ||
316 | export quiet Q KBUILD_VERBOSE | |
317 | ||
318 | ||
319 | # Look for make include files relative to root of kernel src | |
320 | MAKEFLAGS += --include-dir=$(srctree) | |
321 | ||
322 | # We need some generic definitions (do not try to remake the file). | |
323 | $(srctree)/scripts/Kbuild.include: ; | |
324 | include $(srctree)/scripts/Kbuild.include | |
325 | ||
326 | # Make variables (CC, etc...) | |
327 | ||
328 | AS = $(CROSS_COMPILE)as | |
329 | LD = $(CROSS_COMPILE)ld | |
330 | CC = $(CROSS_COMPILE)gcc | |
331 | CPP = $(CC) -E | |
332 | AR = $(CROSS_COMPILE)ar | |
333 | NM = $(CROSS_COMPILE)nm | |
334 | STRIP = $(CROSS_COMPILE)strip | |
335 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
336 | OBJDUMP = $(CROSS_COMPILE)objdump | |
337 | AWK = awk | |
338 | GENKSYMS = scripts/genksyms/genksyms | |
339 | INSTALLKERNEL := installkernel | |
340 | DEPMOD = /sbin/depmod | |
341 | PERL = perl | |
342 | CHECK = sparse | |
343 | ||
344 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
345 | -Wbitwise -Wno-return-void $(CF) | |
346 | CFLAGS_MODULE = | |
347 | AFLAGS_MODULE = | |
348 | LDFLAGS_MODULE = | |
349 | CFLAGS_KERNEL = | |
350 | AFLAGS_KERNEL = | |
351 | CFLAGS_GCOV = -fprofile-arcs -ftest-coverage | |
352 | ||
353 | ||
354 | # Use USERINCLUDE when you must reference the UAPI directories only. | |
355 | USERINCLUDE := \ | |
356 | -I$(srctree)/arch/$(hdr-arch)/include/uapi \ | |
357 | -Iarch/$(hdr-arch)/include/generated/uapi \ | |
358 | -I$(srctree)/include/uapi \ | |
359 | -Iinclude/generated/uapi \ | |
360 | -include $(srctree)/include/linux/kconfig.h | |
361 | ||
362 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
363 | # Needed to be compatible with the O= option | |
364 | LINUXINCLUDE := \ | |
365 | -I$(srctree)/arch/$(hdr-arch)/include \ | |
366 | -Iarch/$(hdr-arch)/include/generated \ | |
367 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ | |
368 | -Iinclude \ | |
369 | $(USERINCLUDE) | |
370 | ||
371 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
372 | ||
373 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ | |
374 | -fno-strict-aliasing -fno-common \ | |
375 | -Werror-implicit-function-declaration \ | |
376 | -Wno-format-security \ | |
377 | -fno-delete-null-pointer-checks | |
378 | KBUILD_AFLAGS_KERNEL := | |
379 | KBUILD_CFLAGS_KERNEL := | |
380 | KBUILD_AFLAGS := -D__ASSEMBLY__ | |
381 | KBUILD_AFLAGS_MODULE := -DMODULE | |
382 | KBUILD_CFLAGS_MODULE := -DMODULE | |
383 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
384 | ||
385 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
386 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
387 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
388 | ||
389 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
390 | export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC | |
391 | export CPP AR NM STRIP OBJCOPY OBJDUMP | |
392 | export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE | |
393 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | |
394 | ||
395 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS | |
396 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV | |
397 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
398 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE | |
399 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL | |
400 | export KBUILD_ARFLAGS | |
401 | ||
402 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
403 | # tree rather than in the kernel tree. The kernel tree might | |
404 | # even be read-only. | |
405 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
406 | ||
407 | # Files to ignore in find ... statements | |
408 | ||
409 | RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \ | |
410 | -o -name .pc -o -name .hg -o -name .git \) -prune -o | |
411 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ | |
412 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
413 | ||
414 | # =========================================================================== | |
415 | # Rules shared between *config targets and build targets | |
416 | ||
417 | # Basic helpers built in scripts/ | |
418 | PHONY += scripts_basic | |
419 | scripts_basic: | |
420 | $(Q)$(MAKE) $(build)=scripts/basic | |
421 | $(Q)rm -f .tmp_quiet_recordmcount | |
422 | ||
423 | # To avoid any implicit rule to kick in, define an empty command. | |
424 | scripts/basic/%: scripts_basic ; | |
425 | ||
426 | PHONY += outputmakefile | |
427 | # outputmakefile generates a Makefile in the output directory, if using a | |
428 | # separate output directory. This allows convenient use of make in the | |
429 | # output directory. | |
430 | outputmakefile: | |
431 | ifneq ($(KBUILD_SRC),) | |
432 | $(Q)ln -fsn $(srctree) source | |
433 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ | |
434 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | |
435 | endif | |
436 | ||
437 | # Support for using generic headers in asm-generic | |
438 | PHONY += asm-generic | |
439 | asm-generic: | |
440 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ | |
441 | src=asm obj=arch/$(SRCARCH)/include/generated/asm | |
442 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ | |
443 | src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm | |
444 | ||
445 | # To make sure we do not include .config for any of the *config targets | |
446 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
447 | # It is allowed to specify more targets when calling make, including | |
448 | # mixing *config targets and build targets. | |
449 | # For example 'make oldconfig all'. | |
450 | # Detect when mixed targets is specified, and make a second invocation | |
451 | # of make so .config is not included in this case either (for *config). | |
452 | ||
453 | version_h := include/generated/uapi/linux/version.h | |
454 | ||
455 | no-dot-config-targets := clean mrproper distclean \ | |
456 | cscope gtags TAGS tags help %docs check% coccicheck \ | |
457 | $(version_h) headers_% archheaders archscripts \ | |
458 | kernelversion %src-pkg | |
459 | ||
460 | config-targets := 0 | |
461 | mixed-targets := 0 | |
462 | dot-config := 1 | |
463 | ||
464 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
465 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
466 | dot-config := 0 | |
467 | endif | |
468 | endif | |
469 | ||
470 | ifeq ($(KBUILD_EXTMOD),) | |
471 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
472 | config-targets := 1 | |
473 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) | |
474 | mixed-targets := 1 | |
475 | endif | |
476 | endif | |
477 | endif | |
478 | ||
479 | ifeq ($(mixed-targets),1) | |
480 | # =========================================================================== | |
481 | # We're called with mixed targets (*config and build targets). | |
482 | # Handle them one by one. | |
483 | ||
484 | %:: FORCE | |
485 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ | |
486 | ||
487 | else | |
488 | ifeq ($(config-targets),1) | |
489 | # =========================================================================== | |
490 | # *config targets only - make sure prerequisites are updated, and descend | |
491 | # in scripts/kconfig to make the *config target | |
492 | ||
493 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
494 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
495 | # used for 'make defconfig' | |
496 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
497 | export KBUILD_DEFCONFIG KBUILD_KCONFIG | |
498 | ||
499 | config: scripts_basic outputmakefile FORCE | |
500 | $(Q)mkdir -p include/linux include/config | |
501 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
502 | ||
503 | %config: scripts_basic outputmakefile FORCE | |
504 | $(Q)mkdir -p include/linux include/config | |
505 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
506 | ||
507 | else | |
508 | # =========================================================================== | |
509 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
510 | # targets and others. In general all targets except *config targets. | |
511 | ||
512 | ifeq ($(KBUILD_EXTMOD),) | |
513 | # Additional helpers built in scripts/ | |
514 | # Carefully list dependencies so we do not try to build scripts twice | |
515 | # in parallel | |
516 | PHONY += scripts | |
517 | scripts: scripts_basic include/config/auto.conf include/config/tristate.conf | |
518 | $(Q)$(MAKE) $(build)=$(@) | |
519 | ||
520 | # Objects we will link into vmlinux / subdirs we need to visit | |
521 | init-y := init/ | |
522 | drivers-y := drivers/ sound/ firmware/ | |
523 | net-y := net/ | |
524 | libs-y := lib/ | |
525 | core-y := usr/ | |
526 | endif # KBUILD_EXTMOD | |
527 | ||
528 | ifeq ($(dot-config),1) | |
529 | # Read in config | |
530 | -include include/config/auto.conf | |
531 | ||
532 | ifeq ($(KBUILD_EXTMOD),) | |
533 | # Read in dependencies to all Kconfig* files, make sure to run | |
534 | # oldconfig if changes are detected. | |
535 | -include include/config/auto.conf.cmd | |
536 | ||
537 | # To avoid any implicit rule to kick in, define an empty command | |
538 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; | |
539 | ||
540 | # If .config is newer than include/config/auto.conf, someone tinkered | |
541 | # with it and forgot to run make oldconfig. | |
542 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so | |
543 | # we execute the config step to be sure to catch updated Kconfig files | |
544 | include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd | |
545 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig | |
546 | else | |
547 | # external modules needs include/generated/autoconf.h and include/config/auto.conf | |
548 | # but do not care if they are up-to-date. Use auto.conf to trigger the test | |
549 | PHONY += include/config/auto.conf | |
550 | ||
551 | include/config/auto.conf: | |
552 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ | |
553 | echo >&2; \ | |
554 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
555 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
556 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
557 | echo >&2 ; \ | |
558 | /bin/false) | |
559 | ||
560 | endif # KBUILD_EXTMOD | |
561 | ||
562 | else | |
563 | # Dummy target needed, because used as prerequisite | |
564 | include/config/auto.conf: ; | |
565 | endif # $(dot-config) | |
566 | ||
567 | # The all: target is the default when no target is given on the | |
568 | # command line. | |
569 | # This allow a user to issue only 'make' to build a kernel including modules | |
570 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
571 | all: vmlinux | |
572 | ||
573 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
574 | KBUILD_CFLAGS += -Os | |
575 | else | |
576 | KBUILD_CFLAGS += -O2 | |
577 | endif | |
578 | ||
579 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
580 | ||
581 | ifdef CONFIG_READABLE_ASM | |
582 | # Disable optimizations that make assembler listings hard to read. | |
583 | # reorder blocks reorders the control in the function | |
584 | # ipa clone creates specialized cloned functions | |
585 | # partial inlining inlines only parts of functions | |
586 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
587 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
588 | $(call cc-option,-fno-partial-inlining) | |
589 | endif | |
590 | ||
591 | ifneq ($(CONFIG_FRAME_WARN),0) | |
592 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) | |
593 | endif | |
594 | ||
595 | # Force gcc to behave correct even for buggy distributions | |
596 | ifndef CONFIG_CC_STACKPROTECTOR | |
597 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) | |
598 | endif | |
599 | ||
600 | # This warning generated too much noise in a regular build. | |
601 | # Use make W=1 to enable this warning (see scripts/Makefile.build) | |
602 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) | |
603 | ||
604 | ifdef CONFIG_FRAME_POINTER | |
605 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
606 | else | |
607 | # Some targets (ARM with Thumb2, for example), can't be built with frame | |
608 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
609 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
610 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
611 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
612 | ifndef CONFIG_FUNCTION_TRACER | |
613 | KBUILD_CFLAGS += -fomit-frame-pointer | |
614 | endif | |
615 | endif | |
616 | ||
617 | ifdef CONFIG_DEBUG_INFO | |
618 | KBUILD_CFLAGS += -g | |
619 | KBUILD_AFLAGS += -gdwarf-2 | |
620 | endif | |
621 | ||
622 | ifdef CONFIG_DEBUG_INFO_REDUCED | |
623 | KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) | |
624 | endif | |
625 | ||
626 | ifdef CONFIG_FUNCTION_TRACER | |
627 | ifdef CONFIG_HAVE_FENTRY | |
628 | CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) | |
629 | endif | |
630 | KBUILD_CFLAGS += -pg $(CC_USING_FENTRY) | |
631 | KBUILD_AFLAGS += $(CC_USING_FENTRY) | |
632 | ifdef CONFIG_DYNAMIC_FTRACE | |
633 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
634 | BUILD_C_RECORDMCOUNT := y | |
635 | export BUILD_C_RECORDMCOUNT | |
636 | endif | |
637 | endif | |
638 | endif | |
639 | ||
640 | # We trigger additional mismatches with less inlining | |
641 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
642 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
643 | endif | |
644 | ||
645 | # arch Makefile may override CC so keep this after arch Makefile is included | |
646 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | |
647 | CHECKFLAGS += $(NOSTDINC_FLAGS) | |
648 | ||
649 | # warn about C99 declaration after statement | |
650 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) | |
651 | ||
652 | # disable pointer signed / unsigned warnings in gcc 4.0 | |
653 | KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) | |
654 | ||
655 | # disable invalid "can't wrap" optimizations for signed / pointers | |
656 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) | |
657 | ||
658 | # conserve stack if available | |
659 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
660 | ||
661 | # use the deterministic mode of AR if available | |
662 | KBUILD_ARFLAGS := $(call ar-option,D) | |
663 | ||
664 | # check for 'asm goto' | |
665 | ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) | |
666 | KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO | |
667 | endif | |
668 | ||
669 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments | |
670 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
671 | KBUILD_AFLAGS += $(KAFLAGS) | |
672 | KBUILD_CFLAGS += $(KCFLAGS) | |
673 | ||
674 | # Use --build-id when available. | |
675 | LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ | |
676 | $(call cc-ldoption, -Wl$(comma)--build-id,)) | |
677 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) | |
678 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) | |
679 | ||
680 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) | |
681 | LDFLAGS_vmlinux += $(call ld-option, -X,) | |
682 | endif | |
683 | ||
684 | # Default kernel image to build when no specific target is given. | |
685 | # KBUILD_IMAGE may be overruled on the command line or | |
686 | # set in the environment | |
687 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
688 | # this default value | |
689 | export KBUILD_IMAGE ?= vmlinux | |
690 | ||
691 | # | |
692 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
693 | # images. Default is /boot, but you can set it to other values | |
694 | export INSTALL_PATH ?= /boot | |
695 | ||
696 | # | |
697 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
698 | # relocations required by build roots. This is not defined in the | |
699 | # makefile but the argument can be passed to make if needed. | |
700 | # | |
701 | ||
702 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | |
703 | export MODLIB | |
704 | ||
705 | # | |
706 | # INSTALL_MOD_STRIP, if defined, will cause modules to be | |
707 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
708 | # the default option --strip-debug will be used. Otherwise, | |
709 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
710 | ||
711 | ifdef INSTALL_MOD_STRIP | |
712 | ifeq ($(INSTALL_MOD_STRIP),1) | |
713 | mod_strip_cmd = $(STRIP) --strip-debug | |
714 | else | |
715 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) | |
716 | endif # INSTALL_MOD_STRIP=1 | |
717 | else | |
718 | mod_strip_cmd = true | |
719 | endif # INSTALL_MOD_STRIP | |
720 | export mod_strip_cmd | |
721 | ||
722 | ||
723 | ifeq ($(CONFIG_MODULE_SIG),y) | |
724 | MODSECKEY = ./signing_key.priv | |
725 | MODPUBKEY = ./signing_key.x509 | |
726 | export MODPUBKEY | |
727 | mod_sign_cmd = perl $(srctree)/scripts/sign-file $(MODSECKEY) $(MODPUBKEY) | |
728 | else | |
729 | mod_sign_cmd = true | |
730 | endif | |
731 | export mod_sign_cmd | |
732 | ||
733 | ||
734 | ifeq ($(KBUILD_EXTMOD),) | |
735 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ | |
736 | ||
737 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
738 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
739 | $(net-y) $(net-m) $(libs-y) $(libs-m))) | |
740 | ||
741 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
742 | $(init-n) $(init-) \ | |
743 | $(core-n) $(core-) $(drivers-n) $(drivers-) \ | |
744 | $(net-n) $(net-) $(libs-n) $(libs-)))) | |
745 | ||
746 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | |
747 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | |
748 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | |
749 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | |
750 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
751 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | |
752 | libs-y := $(libs-y1) $(libs-y2) | |
753 | ||
754 | # Externally visible symbols (used by link-vmlinux.sh) | |
755 | export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) | |
756 | export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) | |
757 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds | |
758 | export LDFLAGS_vmlinux | |
759 | ||
760 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) | |
761 | ||
762 | # Final link of vmlinux | |
763 | cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) | |
764 | quiet_cmd_link-vmlinux = LINK $@ | |
765 | ||
766 | # Include targets which we want to | |
767 | # execute if the rest of the kernel build went well. | |
768 | vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE | |
769 | ifdef CONFIG_HEADERS_CHECK | |
770 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check | |
771 | endif | |
772 | ifdef CONFIG_SAMPLES | |
773 | $(Q)$(MAKE) $(build)=samples | |
774 | endif | |
775 | ifdef CONFIG_BUILD_DOCSRC | |
776 | $(Q)$(MAKE) $(build)=Documentation | |
777 | endif | |
778 | +$(call if_changed,link-vmlinux) | |
779 | ||
780 | # The actual objects are generated when descending, | |
781 | # make sure no implicit rule kicks in | |
782 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; | |
783 | ||
784 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
785 | # Preset locale variables to speed up the build process. Limit locale | |
786 | # tweaks to this spot to avoid wrong language settings when running | |
787 | # make menuconfig etc. | |
788 | # Error messages still appears in the original language | |
789 | ||
790 | PHONY += $(vmlinux-dirs) | |
791 | $(vmlinux-dirs): prepare scripts | |
792 | $(Q)$(MAKE) $(build)=$@ | |
793 | ||
794 | # Store (new) KERNELRELASE string in include/config/kernel.release | |
795 | include/config/kernel.release: include/config/auto.conf FORCE | |
796 | $(Q)rm -f $@ | |
797 | $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@ | |
798 | ||
799 | ||
800 | # Things we need to do before we recursively start building the kernel | |
801 | # or the modules are listed in "prepare". | |
802 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
803 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
804 | # version.h and scripts_basic is processed / created. | |
805 | ||
806 | # Listed in dependency order | |
807 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 | |
808 | ||
809 | # prepare3 is used to check if we are building in a separate output directory, | |
810 | # and if so do: | |
811 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
812 | prepare3: include/config/kernel.release | |
813 | ifneq ($(KBUILD_SRC),) | |
814 | @$(kecho) ' Using $(srctree) as source for kernel' | |
815 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ | |
816 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ | |
817 | echo >&2 " in the '$(srctree)' directory.";\ | |
818 | /bin/false; \ | |
819 | fi; | |
820 | endif | |
821 | ||
822 | # prepare2 creates a makefile if using a separate output directory | |
823 | prepare2: prepare3 outputmakefile asm-generic | |
824 | ||
825 | prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ | |
826 | include/config/auto.conf | |
827 | $(cmd_crmodverdir) | |
828 | ||
829 | archprepare: archheaders archscripts prepare1 scripts_basic | |
830 | ||
831 | prepare0: archprepare FORCE | |
832 | $(Q)$(MAKE) $(build)=. | |
833 | ||
834 | # All the preparing.. | |
835 | prepare: prepare0 | |
836 | ||
837 | # Generate some files | |
838 | # --------------------------------------------------------------------------- | |
839 | ||
840 | # KERNELRELEASE can change from a few different places, meaning version.h | |
841 | # needs to be updated, so this check is forced on all builds | |
842 | ||
843 | uts_len := 64 | |
844 | define filechk_utsrelease.h | |
845 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
846 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
847 | exit 1; \ | |
848 | fi; \ | |
849 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) | |
850 | endef | |
851 | ||
852 | define filechk_version.h | |
853 | (echo \#define LINUX_VERSION_CODE $(shell \ | |
854 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ | |
855 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) | |
856 | endef | |
857 | ||
858 | $(version_h): $(srctree)/Makefile FORCE | |
859 | $(call filechk,version.h) | |
860 | ||
861 | include/generated/utsrelease.h: include/config/kernel.release FORCE | |
862 | $(call filechk,utsrelease.h) | |
863 | ||
864 | PHONY += headerdep | |
865 | headerdep: | |
866 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ | |
867 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
868 | ||
869 | # --------------------------------------------------------------------------- | |
870 | ||
871 | PHONY += depend dep | |
872 | depend dep: | |
873 | @echo '*** Warning: make $@ is unnecessary now.' | |
874 | ||
875 | # --------------------------------------------------------------------------- | |
876 | # Firmware install | |
877 | INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware | |
878 | export INSTALL_FW_PATH | |
879 | ||
880 | PHONY += firmware_install | |
881 | firmware_install: FORCE | |
882 | @mkdir -p $(objtree)/firmware | |
883 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install | |
884 | ||
885 | # --------------------------------------------------------------------------- | |
886 | # Kernel headers | |
887 | ||
888 | #Default location for installed headers | |
889 | export INSTALL_HDR_PATH = $(objtree)/usr | |
890 | ||
891 | hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj | |
892 | ||
893 | # If we do an all arch process set dst to asm-$(hdr-arch) | |
894 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) | |
895 | ||
896 | PHONY += archheaders | |
897 | archheaders: | |
898 | ||
899 | PHONY += archscripts | |
900 | archscripts: | |
901 | ||
902 | PHONY += __headers | |
903 | __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE | |
904 | $(Q)$(MAKE) $(build)=scripts build_unifdef | |
905 | ||
906 | PHONY += headers_install_all | |
907 | headers_install_all: | |
908 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
909 | ||
910 | PHONY += headers_install | |
911 | headers_install: __headers | |
912 | $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ | |
913 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
914 | $(Q)$(MAKE) $(hdr-inst)=include/uapi | |
915 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) | |
916 | ||
917 | PHONY += headers_check_all | |
918 | headers_check_all: headers_install_all | |
919 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check | |
920 | ||
921 | PHONY += headers_check | |
922 | headers_check: headers_install | |
923 | $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 | |
924 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 | |
925 | ||
926 | # --------------------------------------------------------------------------- | |
927 | # Modules | |
928 | ||
929 | ifdef CONFIG_MODULES | |
930 | ||
931 | # By default, build modules as well | |
932 | ||
933 | all: modules | |
934 | ||
935 | # Build modules | |
936 | # | |
937 | # A module can be listed more than once in obj-m resulting in | |
938 | # duplicate lines in modules.order files. Those are removed | |
939 | # using awk while concatenating to the final file. | |
940 | ||
941 | PHONY += modules | |
942 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin | |
943 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order | |
944 | @$(kecho) ' Building modules, stage 2.'; | |
945 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
946 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild | |
947 | ||
948 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) | |
949 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
950 | ||
951 | %/modules.builtin: include/config/auto.conf | |
952 | $(Q)$(MAKE) $(modbuiltin)=$* | |
953 | ||
954 | ||
955 | # Target to prepare building external modules | |
956 | PHONY += modules_prepare | |
957 | modules_prepare: prepare scripts | |
958 | ||
959 | # Target to install modules | |
960 | PHONY += modules_install | |
961 | modules_install: _modinst_ _modinst_post | |
962 | ||
963 | PHONY += _modinst_ | |
964 | _modinst_: | |
965 | @rm -rf $(MODLIB)/kernel | |
966 | @rm -f $(MODLIB)/source | |
967 | @mkdir -p $(MODLIB)/kernel | |
968 | @ln -s $(srctree) $(MODLIB)/source | |
969 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
970 | rm -f $(MODLIB)/build ; \ | |
971 | ln -s $(objtree) $(MODLIB)/build ; \ | |
972 | fi | |
973 | @cp -f $(objtree)/modules.order $(MODLIB)/ | |
974 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ | |
975 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
976 | ||
977 | # This depmod is only for convenience to give the initial | |
978 | # boot a modules.dep even before / is mounted read-write. However the | |
979 | # boot script depmod is the master version. | |
980 | PHONY += _modinst_post | |
981 | _modinst_post: _modinst_ | |
982 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst | |
983 | $(call cmd,depmod) | |
984 | ||
985 | ifeq ($(CONFIG_MODULE_SIG), y) | |
986 | PHONY += modules_sign | |
987 | modules_sign: | |
988 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
989 | endif | |
990 | ||
991 | else # CONFIG_MODULES | |
992 | ||
993 | # Modules not configured | |
994 | # --------------------------------------------------------------------------- | |
995 | ||
996 | modules modules_install: FORCE | |
997 | @echo >&2 | |
998 | @echo >&2 "The present kernel configuration has modules disabled." | |
999 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1000 | @echo >&2 "Then build a kernel with module support enabled." | |
1001 | @echo >&2 | |
1002 | @exit 1 | |
1003 | ||
1004 | endif # CONFIG_MODULES | |
1005 | ||
1006 | ### | |
1007 | # Cleaning is done on three levels. | |
1008 | # make clean Delete most generated files | |
1009 | # Leave enough to build external modules | |
1010 | # make mrproper Delete the current configuration, and all generated files | |
1011 | # make distclean Remove editor backup files, patch leftover files and the like | |
1012 | ||
1013 | # Directories & files removed with 'make clean' | |
1014 | CLEAN_DIRS += $(MODVERDIR) | |
1015 | ||
1016 | # Directories & files removed with 'make mrproper' | |
1017 | MRPROPER_DIRS += include/config usr/include include/generated \ | |
1018 | arch/*/include/generated | |
1019 | MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \ | |
1020 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ | |
1021 | signing_key.priv signing_key.x509 x509.genkey \ | |
1022 | extra_certificates signing_key.x509.keyid \ | |
1023 | signing_key.x509.signer | |
1024 | ||
1025 | # clean - Delete most, but leave enough to build external modules | |
1026 | # | |
1027 | clean: rm-dirs := $(CLEAN_DIRS) | |
1028 | clean: rm-files := $(CLEAN_FILES) | |
1029 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) | |
1030 | ||
1031 | PHONY += $(clean-dirs) clean archclean vmlinuxclean | |
1032 | $(clean-dirs): | |
1033 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1034 | ||
1035 | vmlinuxclean: | |
1036 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
1037 | ||
1038 | clean: archclean vmlinuxclean | |
1039 | ||
1040 | # mrproper - Delete all generated files, including .config | |
1041 | # | |
1042 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1043 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1044 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) | |
1045 | ||
1046 | PHONY += $(mrproper-dirs) mrproper archmrproper | |
1047 | $(mrproper-dirs): | |
1048 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1049 | ||
1050 | mrproper: clean archmrproper $(mrproper-dirs) | |
1051 | $(call cmd,rmdirs) | |
1052 | $(call cmd,rmfiles) | |
1053 | ||
1054 | # distclean | |
1055 | # | |
1056 | PHONY += distclean | |
1057 | ||
1058 | distclean: mrproper | |
1059 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
1060 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1061 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ | |
1062 | -o -name '.*.rej' \ | |
1063 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ | |
1064 | -type f -print | xargs rm -f | |
1065 | ||
1066 | ||
1067 | # Packaging of the kernel to various formats | |
1068 | # --------------------------------------------------------------------------- | |
1069 | # rpm target kept for backward compatibility | |
1070 | package-dir := $(srctree)/scripts/package | |
1071 | ||
1072 | %src-pkg: FORCE | |
1073 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1074 | %pkg: include/config/kernel.release FORCE | |
1075 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1076 | rpm: include/config/kernel.release FORCE | |
1077 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1078 | ||
1079 | ||
1080 | # Brief documentation of the typical targets used | |
1081 | # --------------------------------------------------------------------------- | |
1082 | ||
1083 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) | |
1084 | boards := $(notdir $(boards)) | |
1085 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) | |
1086 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1087 | ||
1088 | help: | |
1089 | @echo 'Cleaning targets:' | |
1090 | @echo ' clean - Remove most generated files but keep the config and' | |
1091 | @echo ' enough build support to build external modules' | |
1092 | @echo ' mrproper - Remove all generated files + config + various backup files' | |
1093 | @echo ' distclean - mrproper + remove editor backup and patch files' | |
1094 | @echo '' | |
1095 | @echo 'Configuration targets:' | |
1096 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1097 | @echo '' | |
1098 | @echo 'Other generic targets:' | |
1099 | @echo ' all - Build all targets marked with [*]' | |
1100 | @echo '* vmlinux - Build the bare kernel' | |
1101 | @echo '* modules - Build all modules' | |
1102 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' | |
1103 | @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' | |
1104 | @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' | |
1105 | @echo ' dir/ - Build all files in dir and below' | |
1106 | @echo ' dir/file.[oisS] - Build specified target only' | |
1107 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1108 | @echo ' (requires a recent binutils and recent build (System.map))' | |
1109 | @echo ' dir/file.ko - Build module including final link' | |
1110 | @echo ' modules_prepare - Set up for building external modules' | |
1111 | @echo ' tags/TAGS - Generate tags file for editors' | |
1112 | @echo ' cscope - Generate cscope index' | |
1113 | @echo ' gtags - Generate GNU GLOBAL index' | |
1114 | @echo ' kernelrelease - Output the release version string' | |
1115 | @echo ' kernelversion - Output the version stored in Makefile' | |
1116 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ | |
1117 | echo ' (default: $(INSTALL_HDR_PATH))'; \ | |
1118 | echo '' | |
1119 | @echo 'Static analysers' | |
1120 | @echo ' checkstack - Generate a list of stack hogs' | |
1121 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
1122 | @echo ' versioncheck - Sanity check on version.h usage' | |
1123 | @echo ' includecheck - Check for duplicate included header files' | |
1124 | @echo ' export_report - List the usages of all exported symbols' | |
1125 | @echo ' headers_check - Sanity check on exported headers' | |
1126 | @echo ' headerdep - Detect inclusion cycles in headers' | |
1127 | @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help | |
1128 | @echo '' | |
1129 | @echo 'Kernel packaging:' | |
1130 | @$(MAKE) $(build)=$(package-dir) help | |
1131 | @echo '' | |
1132 | @echo 'Documentation targets:' | |
1133 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp | |
1134 | @echo '' | |
1135 | @echo 'Architecture specific targets ($(SRCARCH)):' | |
1136 | @$(if $(archhelp),$(archhelp),\ | |
1137 | echo ' No architecture specific help defined for $(SRCARCH)') | |
1138 | @echo '' | |
1139 | @$(if $(boards), \ | |
1140 | $(foreach b, $(boards), \ | |
1141 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1142 | echo '') | |
1143 | @$(if $(board-dirs), \ | |
1144 | $(foreach b, $(board-dirs), \ | |
1145 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1146 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1147 | echo '') | |
1148 | ||
1149 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
1150 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' | |
1151 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1152 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' | |
1153 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1154 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' | |
1155 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' | |
1156 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1157 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1158 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
1159 | @echo ' Multiple levels can be combined with W=12 or W=123' | |
1160 | @echo '' | |
1161 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1162 | @echo 'For further info see the ./README file' | |
1163 | ||
1164 | ||
1165 | help-board-dirs := $(addprefix help-,$(board-dirs)) | |
1166 | ||
1167 | help-boards: $(help-board-dirs) | |
1168 | ||
1169 | boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) | |
1170 | ||
1171 | $(help-board-dirs): help-%: | |
1172 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1173 | @$(if $(boards-per-dir), \ | |
1174 | $(foreach b, $(boards-per-dir), \ | |
1175 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1176 | echo '') | |
1177 | ||
1178 | ||
1179 | # Documentation targets | |
1180 | # --------------------------------------------------------------------------- | |
1181 | %docs: scripts_basic FORCE | |
1182 | $(Q)$(MAKE) $(build)=scripts build_docproc | |
1183 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | |
1184 | ||
1185 | else # KBUILD_EXTMOD | |
1186 | ||
1187 | ### | |
1188 | # External module support. | |
1189 | # When building external modules the kernel used as basis is considered | |
1190 | # read-only, and no consistency checks are made and the make | |
1191 | # system is not used on the basis kernel. If updates are required | |
1192 | # in the basis kernel ordinary make commands (without M=...) must | |
1193 | # be used. | |
1194 | # | |
1195 | # The following are the only valid targets when building external | |
1196 | # modules. | |
1197 | # make M=dir clean Delete all automatically generated files | |
1198 | # make M=dir modules Make all modules in specified dir | |
1199 | # make M=dir Same as 'make M=dir modules' | |
1200 | # make M=dir modules_install | |
1201 | # Install the modules built in the module directory | |
1202 | # Assumes install directory is already created | |
1203 | ||
1204 | # We are always building modules | |
1205 | KBUILD_MODULES := 1 | |
1206 | PHONY += crmodverdir | |
1207 | crmodverdir: | |
1208 | $(cmd_crmodverdir) | |
1209 | ||
1210 | PHONY += $(objtree)/Module.symvers | |
1211 | $(objtree)/Module.symvers: | |
1212 | @test -e $(objtree)/Module.symvers || ( \ | |
1213 | echo; \ | |
1214 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1215 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1216 | echo ) | |
1217 | ||
1218 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
1219 | PHONY += $(module-dirs) modules | |
1220 | $(module-dirs): crmodverdir $(objtree)/Module.symvers | |
1221 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1222 | ||
1223 | modules: $(module-dirs) | |
1224 | @$(kecho) ' Building modules, stage 2.'; | |
1225 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1226 | ||
1227 | PHONY += modules_install | |
1228 | modules_install: _emodinst_ _emodinst_post | |
1229 | ||
1230 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) | |
1231 | PHONY += _emodinst_ | |
1232 | _emodinst_: | |
1233 | $(Q)mkdir -p $(MODLIB)/$(install-dir) | |
1234 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1235 | ||
1236 | PHONY += _emodinst_post | |
1237 | _emodinst_post: _emodinst_ | |
1238 | $(call cmd,depmod) | |
1239 | ||
1240 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) | |
1241 | ||
1242 | PHONY += $(clean-dirs) clean | |
1243 | $(clean-dirs): | |
1244 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1245 | ||
1246 | clean: rm-dirs := $(MODVERDIR) | |
1247 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers | |
1248 | ||
1249 | help: | |
1250 | @echo ' Building external modules.' | |
1251 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1252 | @echo '' | |
1253 | @echo ' modules - default target, build the module(s)' | |
1254 | @echo ' modules_install - install the module' | |
1255 | @echo ' clean - remove generated files in module directory only' | |
1256 | @echo '' | |
1257 | ||
1258 | # Dummies... | |
1259 | PHONY += prepare scripts | |
1260 | prepare: ; | |
1261 | scripts: ; | |
1262 | endif # KBUILD_EXTMOD | |
1263 | ||
1264 | clean: $(clean-dirs) | |
1265 | $(call cmd,rmdirs) | |
1266 | $(call cmd,rmfiles) | |
1267 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ | |
1268 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1269 | -o -name '*.ko.*' \ | |
1270 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1271 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1272 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
1273 | -o -name '*.gcno' \) -type f -print | xargs rm -f | |
1274 | ||
1275 | # Generate tags for editors | |
1276 | # --------------------------------------------------------------------------- | |
1277 | quiet_cmd_tags = GEN $@ | |
1278 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1279 | ||
1280 | tags TAGS cscope gtags: FORCE | |
1281 | $(call cmd,tags) | |
1282 | ||
1283 | # Scripts to check various things for consistency | |
1284 | # --------------------------------------------------------------------------- | |
1285 | ||
1286 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report | |
1287 | ||
1288 | includecheck: | |
1289 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1290 | -name '*.[hcS]' -type f -print | sort \ | |
1291 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
1292 | ||
1293 | versioncheck: | |
1294 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1295 | -name '*.[hcS]' -type f -print | sort \ | |
1296 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
1297 | ||
1298 | coccicheck: | |
1299 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1300 | ||
1301 | namespacecheck: | |
1302 | $(PERL) $(srctree)/scripts/namespace.pl | |
1303 | ||
1304 | export_report: | |
1305 | $(PERL) $(srctree)/scripts/export_report.pl | |
1306 | ||
1307 | endif #ifeq ($(config-targets),1) | |
1308 | endif #ifeq ($(mixed-targets),1) | |
1309 | ||
1310 | PHONY += checkstack kernelrelease kernelversion | |
1311 | ||
1312 | # UML needs a little special treatment here. It wants to use the host | |
1313 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1314 | # else wants $(ARCH), including people doing cross-builds, which means | |
1315 | # that $(SUBARCH) doesn't work here. | |
1316 | ifeq ($(ARCH), um) | |
1317 | CHECKSTACK_ARCH := $(SUBARCH) | |
1318 | else | |
1319 | CHECKSTACK_ARCH := $(ARCH) | |
1320 | endif | |
1321 | checkstack: | |
1322 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
1323 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) | |
1324 | ||
1325 | kernelrelease: | |
1326 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1327 | ||
1328 | kernelversion: | |
1329 | @echo $(KERNELVERSION) | |
1330 | ||
1331 | # Clear a bunch of variables before executing the submake | |
1332 | tools/: FORCE | |
1333 | $(Q)mkdir -p $(objtree)/tools | |
1334 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ | |
1335 | ||
1336 | tools/%: FORCE | |
1337 | $(Q)mkdir -p $(objtree)/tools | |
1338 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ $* | |
1339 | ||
1340 | # Single targets | |
1341 | # --------------------------------------------------------------------------- | |
1342 | # Single targets are compatible with: | |
1343 | # - build with mixed source and output | |
1344 | # - build with separate output dir 'make O=...' | |
1345 | # - external modules | |
1346 | # | |
1347 | # target-dir => where to store outputfile | |
1348 | # build-dir => directory in kernel source tree to use | |
1349 | ||
1350 | ifeq ($(KBUILD_EXTMOD),) | |
1351 | build-dir = $(patsubst %/,%,$(dir $@)) | |
1352 | target-dir = $(dir $@) | |
1353 | else | |
1354 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1355 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1356 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1357 | endif | |
1358 | ||
1359 | %.s: %.c prepare scripts FORCE | |
1360 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1361 | %.i: %.c prepare scripts FORCE | |
1362 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1363 | %.o: %.c prepare scripts FORCE | |
1364 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1365 | %.lst: %.c prepare scripts FORCE | |
1366 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1367 | %.s: %.S prepare scripts FORCE | |
1368 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1369 | %.o: %.S prepare scripts FORCE | |
1370 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1371 | %.symtypes: %.c prepare scripts FORCE | |
1372 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1373 | ||
1374 | # Modules | |
1375 | /: prepare scripts FORCE | |
1376 | $(cmd_crmodverdir) | |
1377 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1378 | $(build)=$(build-dir) | |
1379 | %/: prepare scripts FORCE | |
1380 | $(cmd_crmodverdir) | |
1381 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1382 | $(build)=$(build-dir) | |
1383 | %.ko: prepare scripts FORCE | |
1384 | $(cmd_crmodverdir) | |
1385 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1386 | $(build)=$(build-dir) $(@:.ko=.o) | |
1387 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1388 | ||
1389 | # FIXME Should go into a make.lib or something | |
1390 | # =========================================================================== | |
1391 | ||
1392 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1393 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1394 | ||
1395 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1396 | cmd_rmfiles = rm -f $(rm-files) | |
1397 | ||
1398 | # Run depmod only if we have System.map and depmod is executable | |
1399 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | |
1400 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ | |
1401 | $(KERNELRELEASE) | |
1402 | ||
1403 | # Create temporary dir for module support files | |
1404 | # clean it up only when building all modules | |
1405 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1406 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1407 | ||
1408 | # read all saved command lines | |
1409 | ||
1410 | targets := $(wildcard $(sort $(targets))) | |
1411 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
1412 | ||
1413 | ifneq ($(cmd_files),) | |
1414 | $(cmd_files): ; # Do not try to update included dependency files | |
1415 | include $(cmd_files) | |
1416 | endif | |
1417 | ||
1418 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir | |
1419 | # Usage: | |
1420 | # $(Q)$(MAKE) $(clean)=dir | |
1421 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj | |
1422 | ||
1423 | endif # skip-makefile | |
1424 | ||
1425 | PHONY += FORCE | |
1426 | FORCE: | |
1427 | ||
1428 | # Declare the contents of the .PHONY variable as phony. We keep that | |
1429 | # information in a variable so we can use it in if_changed and friends. | |
1430 | .PHONY: $(PHONY) |