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ACPI / bus: Support for platform initiated graceful shutdown
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1 VERSION = 4
2 PATCHLEVEL = 7
3 SUBLEVEL = 0
4 EXTRAVERSION = -rc4
5 NAME = Psychotic Stoned Sheep
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 # o Do not use make's built-in rules and variables
14 # (this increases performance and avoids hard-to-debug behaviour);
15 # o Look for make include files relative to root of kernel src
16 MAKEFLAGS += -rR --include-dir=$(CURDIR)
17
18 # Avoid funny character set dependencies
19 unexport LC_ALL
20 LC_COLLATE=C
21 LC_NUMERIC=C
22 export LC_COLLATE LC_NUMERIC
23
24 # Avoid interference with shell env settings
25 unexport GREP_OPTIONS
26
27 # We are using a recursive build, so we need to do a little thinking
28 # to get the ordering right.
29 #
30 # Most importantly: sub-Makefiles should only ever modify files in
31 # their own directory. If in some directory we have a dependency on
32 # a file in another dir (which doesn't happen often, but it's often
33 # unavoidable when linking the built-in.o targets which finally
34 # turn into vmlinux), we will call a sub make in that other dir, and
35 # after that we are sure that everything which is in that other dir
36 # is now up to date.
37 #
38 # The only cases where we need to modify files which have global
39 # effects are thus separated out and done before the recursive
40 # descending is started. They are now explicitly listed as the
41 # prepare rule.
42
43 # Beautify output
44 # ---------------------------------------------------------------------------
45 #
46 # Normally, we echo the whole command before executing it. By making
47 # that echo $($(quiet)$(cmd)), we now have the possibility to set
48 # $(quiet) to choose other forms of output instead, e.g.
49 #
50 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
51 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
52 #
53 # If $(quiet) is empty, the whole command will be printed.
54 # If it is set to "quiet_", only the short version will be printed.
55 # If it is set to "silent_", nothing will be printed at all, since
56 # the variable $(silent_cmd_cc_o_c) doesn't exist.
57 #
58 # A simple variant is to prefix commands with $(Q) - that's useful
59 # for commands that shall be hidden in non-verbose mode.
60 #
61 # $(Q)ln $@ :<
62 #
63 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
64 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
65 #
66 # To put more focus on warnings, be less verbose as default
67 # Use 'make V=1' to see the full commands
68
69 ifeq ("$(origin V)", "command line")
70 KBUILD_VERBOSE = $(V)
71 endif
72 ifndef KBUILD_VERBOSE
73 KBUILD_VERBOSE = 0
74 endif
75
76 ifeq ($(KBUILD_VERBOSE),1)
77 quiet =
78 Q =
79 else
80 quiet=quiet_
81 Q = @
82 endif
83
84 # If the user is running make -s (silent mode), suppress echoing of
85 # commands
86
87 ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
88 ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
89 quiet=silent_
90 endif
91 else # make-3.8x
92 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
93 quiet=silent_
94 endif
95 endif
96
97 export quiet Q KBUILD_VERBOSE
98
99 # kbuild supports saving output files in a separate directory.
100 # To locate output files in a separate directory two syntaxes are supported.
101 # In both cases the working directory must be the root of the kernel src.
102 # 1) O=
103 # Use "make O=dir/to/store/output/files/"
104 #
105 # 2) Set KBUILD_OUTPUT
106 # Set the environment variable KBUILD_OUTPUT to point to the directory
107 # where the output files shall be placed.
108 # export KBUILD_OUTPUT=dir/to/store/output/files/
109 # make
110 #
111 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
112 # variable.
113
114 # KBUILD_SRC is set on invocation of make in OBJ directory
115 # KBUILD_SRC is not intended to be used by the regular user (for now)
116 ifeq ($(KBUILD_SRC),)
117
118 # OK, Make called in directory where kernel src resides
119 # Do we want to locate output files in a separate directory?
120 ifeq ("$(origin O)", "command line")
121 KBUILD_OUTPUT := $(O)
122 endif
123
124 # That's our default target when none is given on the command line
125 PHONY := _all
126 _all:
127
128 # Cancel implicit rules on top Makefile
129 $(CURDIR)/Makefile Makefile: ;
130
131 ifneq ($(words $(subst :, ,$(CURDIR))), 1)
132 $(error main directory cannot contain spaces nor colons)
133 endif
134
135 ifneq ($(KBUILD_OUTPUT),)
136 # Invoke a second make in the output directory, passing relevant variables
137 # check that the output directory actually exists
138 saved-output := $(KBUILD_OUTPUT)
139 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
140 && /bin/pwd)
141 $(if $(KBUILD_OUTPUT),, \
142 $(error failed to create output directory "$(saved-output)"))
143
144 PHONY += $(MAKECMDGOALS) sub-make
145
146 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
147 @:
148
149 sub-make:
150 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
151 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
152
153 # Leave processing to above invocation of make
154 skip-makefile := 1
155 endif # ifneq ($(KBUILD_OUTPUT),)
156 endif # ifeq ($(KBUILD_SRC),)
157
158 # We process the rest of the Makefile if this is the final invocation of make
159 ifeq ($(skip-makefile),)
160
161 # Do not print "Entering directory ...",
162 # but we want to display it when entering to the output directory
163 # so that IDEs/editors are able to understand relative filenames.
164 MAKEFLAGS += --no-print-directory
165
166 # Call a source code checker (by default, "sparse") as part of the
167 # C compilation.
168 #
169 # Use 'make C=1' to enable checking of only re-compiled files.
170 # Use 'make C=2' to enable checking of *all* source files, regardless
171 # of whether they are re-compiled or not.
172 #
173 # See the file "Documentation/sparse.txt" for more details, including
174 # where to get the "sparse" utility.
175
176 ifeq ("$(origin C)", "command line")
177 KBUILD_CHECKSRC = $(C)
178 endif
179 ifndef KBUILD_CHECKSRC
180 KBUILD_CHECKSRC = 0
181 endif
182
183 # Use make M=dir to specify directory of external module to build
184 # Old syntax make ... SUBDIRS=$PWD is still supported
185 # Setting the environment variable KBUILD_EXTMOD take precedence
186 ifdef SUBDIRS
187 KBUILD_EXTMOD ?= $(SUBDIRS)
188 endif
189
190 ifeq ("$(origin M)", "command line")
191 KBUILD_EXTMOD := $(M)
192 endif
193
194 # If building an external module we do not care about the all: rule
195 # but instead _all depend on modules
196 PHONY += all
197 ifeq ($(KBUILD_EXTMOD),)
198 _all: all
199 else
200 _all: modules
201 endif
202
203 ifeq ($(KBUILD_SRC),)
204 # building in the source tree
205 srctree := .
206 else
207 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
208 # building in a subdirectory of the source tree
209 srctree := ..
210 else
211 srctree := $(KBUILD_SRC)
212 endif
213 endif
214 objtree := .
215 src := $(srctree)
216 obj := $(objtree)
217
218 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
219
220 export srctree objtree VPATH
221
222 # SUBARCH tells the usermode build what the underlying arch is. That is set
223 # first, and if a usermode build is happening, the "ARCH=um" on the command
224 # line overrides the setting of ARCH below. If a native build is happening,
225 # then ARCH is assigned, getting whatever value it gets normally, and
226 # SUBARCH is subsequently ignored.
227
228 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
229 -e s/sun4u/sparc64/ \
230 -e s/arm.*/arm/ -e s/sa110/arm/ \
231 -e s/s390x/s390/ -e s/parisc64/parisc/ \
232 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
233 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
234
235 # Cross compiling and selecting different set of gcc/bin-utils
236 # ---------------------------------------------------------------------------
237 #
238 # When performing cross compilation for other architectures ARCH shall be set
239 # to the target architecture. (See arch/* for the possibilities).
240 # ARCH can be set during invocation of make:
241 # make ARCH=ia64
242 # Another way is to have ARCH set in the environment.
243 # The default ARCH is the host where make is executed.
244
245 # CROSS_COMPILE specify the prefix used for all executables used
246 # during compilation. Only gcc and related bin-utils executables
247 # are prefixed with $(CROSS_COMPILE).
248 # CROSS_COMPILE can be set on the command line
249 # make CROSS_COMPILE=ia64-linux-
250 # Alternatively CROSS_COMPILE can be set in the environment.
251 # A third alternative is to store a setting in .config so that plain
252 # "make" in the configured kernel build directory always uses that.
253 # Default value for CROSS_COMPILE is not to prefix executables
254 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
255 ARCH ?= $(SUBARCH)
256 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
257
258 # Architecture as present in compile.h
259 UTS_MACHINE := $(ARCH)
260 SRCARCH := $(ARCH)
261
262 # Additional ARCH settings for x86
263 ifeq ($(ARCH),i386)
264 SRCARCH := x86
265 endif
266 ifeq ($(ARCH),x86_64)
267 SRCARCH := x86
268 endif
269
270 # Additional ARCH settings for sparc
271 ifeq ($(ARCH),sparc32)
272 SRCARCH := sparc
273 endif
274 ifeq ($(ARCH),sparc64)
275 SRCARCH := sparc
276 endif
277
278 # Additional ARCH settings for sh
279 ifeq ($(ARCH),sh64)
280 SRCARCH := sh
281 endif
282
283 # Additional ARCH settings for tile
284 ifeq ($(ARCH),tilepro)
285 SRCARCH := tile
286 endif
287 ifeq ($(ARCH),tilegx)
288 SRCARCH := tile
289 endif
290
291 # Where to locate arch specific headers
292 hdr-arch := $(SRCARCH)
293
294 KCONFIG_CONFIG ?= .config
295 export KCONFIG_CONFIG
296
297 # SHELL used by kbuild
298 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
299 else if [ -x /bin/bash ]; then echo /bin/bash; \
300 else echo sh; fi ; fi)
301
302 HOSTCC = gcc
303 HOSTCXX = g++
304 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
305 HOSTCXXFLAGS = -O2
306
307 ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
308 HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
309 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
310 endif
311
312 # Decide whether to build built-in, modular, or both.
313 # Normally, just do built-in.
314
315 KBUILD_MODULES :=
316 KBUILD_BUILTIN := 1
317
318 # If we have only "make modules", don't compile built-in objects.
319 # When we're building modules with modversions, we need to consider
320 # the built-in objects during the descend as well, in order to
321 # make sure the checksums are up to date before we record them.
322
323 ifeq ($(MAKECMDGOALS),modules)
324 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
325 endif
326
327 # If we have "make <whatever> modules", compile modules
328 # in addition to whatever we do anyway.
329 # Just "make" or "make all" shall build modules as well
330
331 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
332 KBUILD_MODULES := 1
333 endif
334
335 ifeq ($(MAKECMDGOALS),)
336 KBUILD_MODULES := 1
337 endif
338
339 export KBUILD_MODULES KBUILD_BUILTIN
340 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
341
342 # We need some generic definitions (do not try to remake the file).
343 scripts/Kbuild.include: ;
344 include scripts/Kbuild.include
345
346 # Make variables (CC, etc...)
347 AS = $(CROSS_COMPILE)as
348 LD = $(CROSS_COMPILE)ld
349 CC = $(CROSS_COMPILE)gcc
350 CPP = $(CC) -E
351 AR = $(CROSS_COMPILE)ar
352 NM = $(CROSS_COMPILE)nm
353 STRIP = $(CROSS_COMPILE)strip
354 OBJCOPY = $(CROSS_COMPILE)objcopy
355 OBJDUMP = $(CROSS_COMPILE)objdump
356 AWK = awk
357 GENKSYMS = scripts/genksyms/genksyms
358 INSTALLKERNEL := installkernel
359 DEPMOD = /sbin/depmod
360 PERL = perl
361 PYTHON = python
362 CHECK = sparse
363
364 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
365 -Wbitwise -Wno-return-void $(CF)
366 CFLAGS_MODULE =
367 AFLAGS_MODULE =
368 LDFLAGS_MODULE =
369 CFLAGS_KERNEL =
370 AFLAGS_KERNEL =
371 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im -Wno-maybe-uninitialized
372 CFLAGS_KCOV = -fsanitize-coverage=trace-pc
373
374
375 # Use USERINCLUDE when you must reference the UAPI directories only.
376 USERINCLUDE := \
377 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
378 -Iarch/$(hdr-arch)/include/generated/uapi \
379 -I$(srctree)/include/uapi \
380 -Iinclude/generated/uapi \
381 -include $(srctree)/include/linux/kconfig.h
382
383 # Use LINUXINCLUDE when you must reference the include/ directory.
384 # Needed to be compatible with the O= option
385 LINUXINCLUDE := \
386 -I$(srctree)/arch/$(hdr-arch)/include \
387 -Iarch/$(hdr-arch)/include/generated/uapi \
388 -Iarch/$(hdr-arch)/include/generated \
389 $(if $(KBUILD_SRC), -I$(srctree)/include) \
390 -Iinclude \
391 $(USERINCLUDE)
392
393 KBUILD_CPPFLAGS := -D__KERNEL__
394
395 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
396 -fno-strict-aliasing -fno-common \
397 -Werror-implicit-function-declaration \
398 -Wno-format-security \
399 -std=gnu89
400
401 KBUILD_AFLAGS_KERNEL :=
402 KBUILD_CFLAGS_KERNEL :=
403 KBUILD_AFLAGS := -D__ASSEMBLY__
404 KBUILD_AFLAGS_MODULE := -DMODULE
405 KBUILD_CFLAGS_MODULE := -DMODULE
406 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
407
408 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
409 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
410 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
411
412 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
413 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
414 export CPP AR NM STRIP OBJCOPY OBJDUMP
415 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
416 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
417
418 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
419 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
420 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
421 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
422 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
423 export KBUILD_ARFLAGS
424
425 # When compiling out-of-tree modules, put MODVERDIR in the module
426 # tree rather than in the kernel tree. The kernel tree might
427 # even be read-only.
428 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
429
430 # Files to ignore in find ... statements
431
432 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
433 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
434 -prune -o
435 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
436 --exclude CVS --exclude .pc --exclude .hg --exclude .git
437
438 # ===========================================================================
439 # Rules shared between *config targets and build targets
440
441 # Basic helpers built in scripts/
442 PHONY += scripts_basic
443 scripts_basic:
444 $(Q)$(MAKE) $(build)=scripts/basic
445 $(Q)rm -f .tmp_quiet_recordmcount
446
447 # To avoid any implicit rule to kick in, define an empty command.
448 scripts/basic/%: scripts_basic ;
449
450 PHONY += outputmakefile
451 # outputmakefile generates a Makefile in the output directory, if using a
452 # separate output directory. This allows convenient use of make in the
453 # output directory.
454 outputmakefile:
455 ifneq ($(KBUILD_SRC),)
456 $(Q)ln -fsn $(srctree) source
457 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
458 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
459 endif
460
461 # Support for using generic headers in asm-generic
462 PHONY += asm-generic
463 asm-generic:
464 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
465 src=asm obj=arch/$(SRCARCH)/include/generated/asm
466 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
467 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
468
469 # To make sure we do not include .config for any of the *config targets
470 # catch them early, and hand them over to scripts/kconfig/Makefile
471 # It is allowed to specify more targets when calling make, including
472 # mixing *config targets and build targets.
473 # For example 'make oldconfig all'.
474 # Detect when mixed targets is specified, and make a second invocation
475 # of make so .config is not included in this case either (for *config).
476
477 version_h := include/generated/uapi/linux/version.h
478 old_version_h := include/linux/version.h
479
480 no-dot-config-targets := clean mrproper distclean \
481 cscope gtags TAGS tags help% %docs check% coccicheck \
482 $(version_h) headers_% archheaders archscripts \
483 kernelversion %src-pkg
484
485 config-targets := 0
486 mixed-targets := 0
487 dot-config := 1
488
489 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
490 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
491 dot-config := 0
492 endif
493 endif
494
495 ifeq ($(KBUILD_EXTMOD),)
496 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
497 config-targets := 1
498 ifneq ($(words $(MAKECMDGOALS)),1)
499 mixed-targets := 1
500 endif
501 endif
502 endif
503 # install and module_install need also be processed one by one
504 ifneq ($(filter install,$(MAKECMDGOALS)),)
505 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
506 mixed-targets := 1
507 endif
508 endif
509
510 ifeq ($(mixed-targets),1)
511 # ===========================================================================
512 # We're called with mixed targets (*config and build targets).
513 # Handle them one by one.
514
515 PHONY += $(MAKECMDGOALS) __build_one_by_one
516
517 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
518 @:
519
520 __build_one_by_one:
521 $(Q)set -e; \
522 for i in $(MAKECMDGOALS); do \
523 $(MAKE) -f $(srctree)/Makefile $$i; \
524 done
525
526 else
527 ifeq ($(config-targets),1)
528 # ===========================================================================
529 # *config targets only - make sure prerequisites are updated, and descend
530 # in scripts/kconfig to make the *config target
531
532 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
533 # KBUILD_DEFCONFIG may point out an alternative default configuration
534 # used for 'make defconfig'
535 include arch/$(SRCARCH)/Makefile
536 export KBUILD_DEFCONFIG KBUILD_KCONFIG
537
538 config: scripts_basic outputmakefile FORCE
539 $(Q)$(MAKE) $(build)=scripts/kconfig $@
540
541 %config: scripts_basic outputmakefile FORCE
542 $(Q)$(MAKE) $(build)=scripts/kconfig $@
543
544 else
545 # ===========================================================================
546 # Build targets only - this includes vmlinux, arch specific targets, clean
547 # targets and others. In general all targets except *config targets.
548
549 ifeq ($(KBUILD_EXTMOD),)
550 # Additional helpers built in scripts/
551 # Carefully list dependencies so we do not try to build scripts twice
552 # in parallel
553 PHONY += scripts
554 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
555 asm-generic
556 $(Q)$(MAKE) $(build)=$(@)
557
558 # Objects we will link into vmlinux / subdirs we need to visit
559 init-y := init/
560 drivers-y := drivers/ sound/ firmware/
561 net-y := net/
562 libs-y := lib/
563 core-y := usr/
564 virt-y := virt/
565 endif # KBUILD_EXTMOD
566
567 ifeq ($(dot-config),1)
568 # Read in config
569 -include include/config/auto.conf
570
571 ifeq ($(KBUILD_EXTMOD),)
572 # Read in dependencies to all Kconfig* files, make sure to run
573 # oldconfig if changes are detected.
574 -include include/config/auto.conf.cmd
575
576 # To avoid any implicit rule to kick in, define an empty command
577 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
578
579 # If .config is newer than include/config/auto.conf, someone tinkered
580 # with it and forgot to run make oldconfig.
581 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
582 # we execute the config step to be sure to catch updated Kconfig files
583 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
584 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
585 else
586 # external modules needs include/generated/autoconf.h and include/config/auto.conf
587 # but do not care if they are up-to-date. Use auto.conf to trigger the test
588 PHONY += include/config/auto.conf
589
590 include/config/auto.conf:
591 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
592 echo >&2; \
593 echo >&2 " ERROR: Kernel configuration is invalid."; \
594 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
595 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
596 echo >&2 ; \
597 /bin/false)
598
599 endif # KBUILD_EXTMOD
600
601 else
602 # Dummy target needed, because used as prerequisite
603 include/config/auto.conf: ;
604 endif # $(dot-config)
605
606 # The all: target is the default when no target is given on the
607 # command line.
608 # This allow a user to issue only 'make' to build a kernel including modules
609 # Defaults to vmlinux, but the arch makefile usually adds further targets
610 all: vmlinux
611
612 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
613 # values of the respective KBUILD_* variables
614 ARCH_CPPFLAGS :=
615 ARCH_AFLAGS :=
616 ARCH_CFLAGS :=
617 include arch/$(SRCARCH)/Makefile
618
619 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
620
621 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
622 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
623 else
624 ifdef CONFIG_PROFILE_ALL_BRANCHES
625 KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
626 else
627 KBUILD_CFLAGS += -O2
628 endif
629 endif
630
631 # Tell gcc to never replace conditional load with a non-conditional one
632 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
633
634 ifdef CONFIG_READABLE_ASM
635 # Disable optimizations that make assembler listings hard to read.
636 # reorder blocks reorders the control in the function
637 # ipa clone creates specialized cloned functions
638 # partial inlining inlines only parts of functions
639 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
640 $(call cc-option,-fno-ipa-cp-clone,) \
641 $(call cc-option,-fno-partial-inlining)
642 endif
643
644 ifneq ($(CONFIG_FRAME_WARN),0)
645 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
646 endif
647
648 # Handle stack protector mode.
649 #
650 # Since kbuild can potentially perform two passes (first with the old
651 # .config values and then with updated .config values), we cannot error out
652 # if a desired compiler option is unsupported. If we were to error, kbuild
653 # could never get to the second pass and actually notice that we changed
654 # the option to something that was supported.
655 #
656 # Additionally, we don't want to fallback and/or silently change which compiler
657 # flags will be used, since that leads to producing kernels with different
658 # security feature characteristics depending on the compiler used. ("But I
659 # selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
660 #
661 # The middle ground is to warn here so that the failed option is obvious, but
662 # to let the build fail with bad compiler flags so that we can't produce a
663 # kernel when there is a CONFIG and compiler mismatch.
664 #
665 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
666 stackp-flag := -fstack-protector
667 ifeq ($(call cc-option, $(stackp-flag)),)
668 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
669 -fstack-protector not supported by compiler)
670 endif
671 else
672 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
673 stackp-flag := -fstack-protector-strong
674 ifeq ($(call cc-option, $(stackp-flag)),)
675 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
676 -fstack-protector-strong not supported by compiler)
677 endif
678 else
679 # Force off for distro compilers that enable stack protector by default.
680 stackp-flag := $(call cc-option, -fno-stack-protector)
681 endif
682 endif
683 KBUILD_CFLAGS += $(stackp-flag)
684
685 ifdef CONFIG_KCOV
686 ifeq ($(call cc-option, $(CFLAGS_KCOV)),)
687 $(warning Cannot use CONFIG_KCOV: \
688 -fsanitize-coverage=trace-pc is not supported by compiler)
689 CFLAGS_KCOV =
690 endif
691 endif
692
693 ifeq ($(cc-name),clang)
694 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
695 KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
696 KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
697 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
698 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
699 # Quiet clang warning: comparison of unsigned expression < 0 is always false
700 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
701 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
702 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
703 # See modpost pattern 2
704 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
705 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
706 else
707
708 # These warnings generated too much noise in a regular build.
709 # Use make W=1 to enable them (see scripts/Makefile.build)
710 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
711 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
712 endif
713
714 ifdef CONFIG_FRAME_POINTER
715 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
716 else
717 # Some targets (ARM with Thumb2, for example), can't be built with frame
718 # pointers. For those, we don't have FUNCTION_TRACER automatically
719 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
720 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
721 # -fomit-frame-pointer with FUNCTION_TRACER.
722 ifndef CONFIG_FUNCTION_TRACER
723 KBUILD_CFLAGS += -fomit-frame-pointer
724 endif
725 endif
726
727 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
728
729 ifdef CONFIG_DEBUG_INFO
730 ifdef CONFIG_DEBUG_INFO_SPLIT
731 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
732 else
733 KBUILD_CFLAGS += -g
734 endif
735 KBUILD_AFLAGS += -Wa,-gdwarf-2
736 endif
737 ifdef CONFIG_DEBUG_INFO_DWARF4
738 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
739 endif
740
741 ifdef CONFIG_DEBUG_INFO_REDUCED
742 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
743 $(call cc-option,-fno-var-tracking)
744 endif
745
746 ifdef CONFIG_FUNCTION_TRACER
747 ifndef CC_FLAGS_FTRACE
748 CC_FLAGS_FTRACE := -pg
749 endif
750 export CC_FLAGS_FTRACE
751 ifdef CONFIG_HAVE_FENTRY
752 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
753 endif
754 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
755 KBUILD_AFLAGS += $(CC_USING_FENTRY)
756 ifdef CONFIG_DYNAMIC_FTRACE
757 ifdef CONFIG_HAVE_C_RECORDMCOUNT
758 BUILD_C_RECORDMCOUNT := y
759 export BUILD_C_RECORDMCOUNT
760 endif
761 endif
762 endif
763
764 # We trigger additional mismatches with less inlining
765 ifdef CONFIG_DEBUG_SECTION_MISMATCH
766 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
767 endif
768
769 # arch Makefile may override CC so keep this after arch Makefile is included
770 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
771 CHECKFLAGS += $(NOSTDINC_FLAGS)
772
773 # warn about C99 declaration after statement
774 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
775
776 # disable pointer signed / unsigned warnings in gcc 4.0
777 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
778
779 # disable invalid "can't wrap" optimizations for signed / pointers
780 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
781
782 # conserve stack if available
783 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
784
785 # disallow errors like 'EXPORT_GPL(foo);' with missing header
786 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
787
788 # require functions to have arguments in prototypes, not empty 'int foo()'
789 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
790
791 # Prohibit date/time macros, which would make the build non-deterministic
792 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
793
794 # enforce correct pointer usage
795 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
796
797 # use the deterministic mode of AR if available
798 KBUILD_ARFLAGS := $(call ar-option,D)
799
800 # check for 'asm goto'
801 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
802 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
803 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
804 endif
805
806 include scripts/Makefile.kasan
807 include scripts/Makefile.extrawarn
808 include scripts/Makefile.ubsan
809
810 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
811 # last assignments
812 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
813 KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
814 KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
815
816 # Use --build-id when available.
817 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
818 $(call cc-ldoption, -Wl$(comma)--build-id,))
819 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
820 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
821
822 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
823 LDFLAGS_vmlinux += $(call ld-option, -X,)
824 endif
825
826 # Default kernel image to build when no specific target is given.
827 # KBUILD_IMAGE may be overruled on the command line or
828 # set in the environment
829 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
830 # this default value
831 export KBUILD_IMAGE ?= vmlinux
832
833 #
834 # INSTALL_PATH specifies where to place the updated kernel and system map
835 # images. Default is /boot, but you can set it to other values
836 export INSTALL_PATH ?= /boot
837
838 #
839 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
840 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
841 # an argument if needed. Otherwise it defaults to the kernel install path
842 #
843 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
844
845 #
846 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
847 # relocations required by build roots. This is not defined in the
848 # makefile but the argument can be passed to make if needed.
849 #
850
851 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
852 export MODLIB
853
854 #
855 # INSTALL_MOD_STRIP, if defined, will cause modules to be
856 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
857 # the default option --strip-debug will be used. Otherwise,
858 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
859
860 ifdef INSTALL_MOD_STRIP
861 ifeq ($(INSTALL_MOD_STRIP),1)
862 mod_strip_cmd = $(STRIP) --strip-debug
863 else
864 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
865 endif # INSTALL_MOD_STRIP=1
866 else
867 mod_strip_cmd = true
868 endif # INSTALL_MOD_STRIP
869 export mod_strip_cmd
870
871 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
872 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
873 # or CONFIG_MODULE_COMPRESS_XZ.
874
875 mod_compress_cmd = true
876 ifdef CONFIG_MODULE_COMPRESS
877 ifdef CONFIG_MODULE_COMPRESS_GZIP
878 mod_compress_cmd = gzip -n -f
879 endif # CONFIG_MODULE_COMPRESS_GZIP
880 ifdef CONFIG_MODULE_COMPRESS_XZ
881 mod_compress_cmd = xz -f
882 endif # CONFIG_MODULE_COMPRESS_XZ
883 endif # CONFIG_MODULE_COMPRESS
884 export mod_compress_cmd
885
886 # Select initial ramdisk compression format, default is gzip(1).
887 # This shall be used by the dracut(8) tool while creating an initramfs image.
888 #
889 INITRD_COMPRESS-y := gzip
890 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
891 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
892 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
893 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
894 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
895 # do not export INITRD_COMPRESS, since we didn't actually
896 # choose a sane default compression above.
897 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
898
899 ifdef CONFIG_MODULE_SIG_ALL
900 $(eval $(call config_filename,MODULE_SIG_KEY))
901
902 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
903 else
904 mod_sign_cmd = true
905 endif
906 export mod_sign_cmd
907
908
909 ifeq ($(KBUILD_EXTMOD),)
910 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
911
912 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
913 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
914 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
915
916 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
917 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
918
919 init-y := $(patsubst %/, %/built-in.o, $(init-y))
920 core-y := $(patsubst %/, %/built-in.o, $(core-y))
921 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
922 net-y := $(patsubst %/, %/built-in.o, $(net-y))
923 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
924 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
925 libs-y := $(libs-y1) $(libs-y2)
926 virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
927
928 # Externally visible symbols (used by link-vmlinux.sh)
929 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
930 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
931 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
932 export LDFLAGS_vmlinux
933 # used by scripts/pacmage/Makefile
934 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
935
936 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
937
938 # Include targets which we want to execute sequentially if the rest of the
939 # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
940 # evaluated more than once.
941 PHONY += vmlinux_prereq
942 vmlinux_prereq: $(vmlinux-deps) FORCE
943 ifdef CONFIG_HEADERS_CHECK
944 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
945 endif
946 ifdef CONFIG_BUILD_DOCSRC
947 $(Q)$(MAKE) $(build)=Documentation
948 endif
949 ifdef CONFIG_GDB_SCRIPTS
950 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
951 endif
952 ifdef CONFIG_TRIM_UNUSED_KSYMS
953 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
954 "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq"
955 endif
956
957 # standalone target for easier testing
958 include/generated/autoksyms.h: FORCE
959 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
960
961 # Final link of vmlinux
962 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
963 quiet_cmd_link-vmlinux = LINK $@
964
965 vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
966 +$(call if_changed,link-vmlinux)
967
968 # Build samples along the rest of the kernel
969 ifdef CONFIG_SAMPLES
970 vmlinux-dirs += samples
971 endif
972
973 # The actual objects are generated when descending,
974 # make sure no implicit rule kicks in
975 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
976
977 # Handle descending into subdirectories listed in $(vmlinux-dirs)
978 # Preset locale variables to speed up the build process. Limit locale
979 # tweaks to this spot to avoid wrong language settings when running
980 # make menuconfig etc.
981 # Error messages still appears in the original language
982
983 PHONY += $(vmlinux-dirs)
984 $(vmlinux-dirs): prepare scripts
985 $(Q)$(MAKE) $(build)=$@
986
987 define filechk_kernel.release
988 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
989 endef
990
991 # Store (new) KERNELRELEASE string in include/config/kernel.release
992 include/config/kernel.release: include/config/auto.conf FORCE
993 $(call filechk,kernel.release)
994
995
996 # Things we need to do before we recursively start building the kernel
997 # or the modules are listed in "prepare".
998 # A multi level approach is used. prepareN is processed before prepareN-1.
999 # archprepare is used in arch Makefiles and when processed asm symlink,
1000 # version.h and scripts_basic is processed / created.
1001
1002 # Listed in dependency order
1003 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
1004
1005 # prepare3 is used to check if we are building in a separate output directory,
1006 # and if so do:
1007 # 1) Check that make has not been executed in the kernel src $(srctree)
1008 prepare3: include/config/kernel.release
1009 ifneq ($(KBUILD_SRC),)
1010 @$(kecho) ' Using $(srctree) as source for kernel'
1011 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1012 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1013 echo >&2 " in the '$(srctree)' directory.";\
1014 /bin/false; \
1015 fi;
1016 endif
1017
1018 # prepare2 creates a makefile if using a separate output directory
1019 prepare2: prepare3 outputmakefile asm-generic
1020
1021 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
1022 include/config/auto.conf
1023 $(cmd_crmodverdir)
1024 $(Q)test -e include/generated/autoksyms.h || \
1025 touch include/generated/autoksyms.h
1026
1027 archprepare: archheaders archscripts prepare1 scripts_basic
1028
1029 prepare0: archprepare
1030 $(Q)$(MAKE) $(build)=.
1031
1032 # All the preparing..
1033 prepare: prepare0 prepare-objtool
1034
1035 ifdef CONFIG_STACK_VALIDATION
1036 has_libelf := $(call try-run,\
1037 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
1038 ifeq ($(has_libelf),1)
1039 objtool_target := tools/objtool FORCE
1040 else
1041 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev or elfutils-libelf-devel")
1042 SKIP_STACK_VALIDATION := 1
1043 export SKIP_STACK_VALIDATION
1044 endif
1045 endif
1046
1047 PHONY += prepare-objtool
1048 prepare-objtool: $(objtool_target)
1049
1050 # Generate some files
1051 # ---------------------------------------------------------------------------
1052
1053 # KERNELRELEASE can change from a few different places, meaning version.h
1054 # needs to be updated, so this check is forced on all builds
1055
1056 uts_len := 64
1057 define filechk_utsrelease.h
1058 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1059 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1060 exit 1; \
1061 fi; \
1062 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1063 endef
1064
1065 define filechk_version.h
1066 (echo \#define LINUX_VERSION_CODE $(shell \
1067 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1068 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1069 endef
1070
1071 $(version_h): $(srctree)/Makefile FORCE
1072 $(call filechk,version.h)
1073 $(Q)rm -f $(old_version_h)
1074
1075 include/generated/utsrelease.h: include/config/kernel.release FORCE
1076 $(call filechk,utsrelease.h)
1077
1078 PHONY += headerdep
1079 headerdep:
1080 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1081 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1082
1083 # ---------------------------------------------------------------------------
1084 # Firmware install
1085 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1086 export INSTALL_FW_PATH
1087
1088 PHONY += firmware_install
1089 firmware_install:
1090 @mkdir -p $(objtree)/firmware
1091 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1092
1093 # ---------------------------------------------------------------------------
1094 # Kernel headers
1095
1096 #Default location for installed headers
1097 export INSTALL_HDR_PATH = $(objtree)/usr
1098
1099 # If we do an all arch process set dst to asm-$(hdr-arch)
1100 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1101
1102 PHONY += archheaders
1103 archheaders:
1104
1105 PHONY += archscripts
1106 archscripts:
1107
1108 PHONY += __headers
1109 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts
1110 $(Q)$(MAKE) $(build)=scripts build_unifdef
1111
1112 PHONY += headers_install_all
1113 headers_install_all:
1114 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1115
1116 PHONY += headers_install
1117 headers_install: __headers
1118 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1119 $(error Headers not exportable for the $(SRCARCH) architecture))
1120 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1121 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
1122
1123 PHONY += headers_check_all
1124 headers_check_all: headers_install_all
1125 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1126
1127 PHONY += headers_check
1128 headers_check: headers_install
1129 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1130 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
1131
1132 # ---------------------------------------------------------------------------
1133 # Kernel selftest
1134
1135 PHONY += kselftest
1136 kselftest:
1137 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1138
1139 kselftest-clean:
1140 $(Q)$(MAKE) -C tools/testing/selftests clean
1141
1142 PHONY += kselftest-merge
1143 kselftest-merge:
1144 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1145 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1146 -m $(objtree)/.config \
1147 $(srctree)/tools/testing/selftests/*/config
1148 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1149
1150 # ---------------------------------------------------------------------------
1151 # Modules
1152
1153 ifdef CONFIG_MODULES
1154
1155 # By default, build modules as well
1156
1157 all: modules
1158
1159 # Build modules
1160 #
1161 # A module can be listed more than once in obj-m resulting in
1162 # duplicate lines in modules.order files. Those are removed
1163 # using awk while concatenating to the final file.
1164
1165 PHONY += modules
1166 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1167 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1168 @$(kecho) ' Building modules, stage 2.';
1169 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1170 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1171
1172 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1173 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1174
1175 %/modules.builtin: include/config/auto.conf
1176 $(Q)$(MAKE) $(modbuiltin)=$*
1177
1178
1179 # Target to prepare building external modules
1180 PHONY += modules_prepare
1181 modules_prepare: prepare scripts
1182
1183 # Target to install modules
1184 PHONY += modules_install
1185 modules_install: _modinst_ _modinst_post
1186
1187 PHONY += _modinst_
1188 _modinst_:
1189 @rm -rf $(MODLIB)/kernel
1190 @rm -f $(MODLIB)/source
1191 @mkdir -p $(MODLIB)/kernel
1192 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1193 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1194 rm -f $(MODLIB)/build ; \
1195 ln -s $(CURDIR) $(MODLIB)/build ; \
1196 fi
1197 @cp -f $(objtree)/modules.order $(MODLIB)/
1198 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1199 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1200
1201 # This depmod is only for convenience to give the initial
1202 # boot a modules.dep even before / is mounted read-write. However the
1203 # boot script depmod is the master version.
1204 PHONY += _modinst_post
1205 _modinst_post: _modinst_
1206 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1207 $(call cmd,depmod)
1208
1209 ifeq ($(CONFIG_MODULE_SIG), y)
1210 PHONY += modules_sign
1211 modules_sign:
1212 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1213 endif
1214
1215 else # CONFIG_MODULES
1216
1217 # Modules not configured
1218 # ---------------------------------------------------------------------------
1219
1220 PHONY += modules modules_install
1221 modules modules_install:
1222 @echo >&2
1223 @echo >&2 "The present kernel configuration has modules disabled."
1224 @echo >&2 "Type 'make config' and enable loadable module support."
1225 @echo >&2 "Then build a kernel with module support enabled."
1226 @echo >&2
1227 @exit 1
1228
1229 endif # CONFIG_MODULES
1230
1231 ###
1232 # Cleaning is done on three levels.
1233 # make clean Delete most generated files
1234 # Leave enough to build external modules
1235 # make mrproper Delete the current configuration, and all generated files
1236 # make distclean Remove editor backup files, patch leftover files and the like
1237
1238 # Directories & files removed with 'make clean'
1239 CLEAN_DIRS += $(MODVERDIR)
1240
1241 # Directories & files removed with 'make mrproper'
1242 MRPROPER_DIRS += include/config usr/include include/generated \
1243 arch/*/include/generated .tmp_objdiff
1244 MRPROPER_FILES += .config .config.old .version .old_version \
1245 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1246 signing_key.pem signing_key.priv signing_key.x509 \
1247 x509.genkey extra_certificates signing_key.x509.keyid \
1248 signing_key.x509.signer vmlinux-gdb.py
1249
1250 # clean - Delete most, but leave enough to build external modules
1251 #
1252 clean: rm-dirs := $(CLEAN_DIRS)
1253 clean: rm-files := $(CLEAN_FILES)
1254 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1255
1256 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1257 $(clean-dirs):
1258 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1259
1260 vmlinuxclean:
1261 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1262
1263 clean: archclean vmlinuxclean
1264
1265 # mrproper - Delete all generated files, including .config
1266 #
1267 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1268 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1269 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1270
1271 PHONY += $(mrproper-dirs) mrproper archmrproper
1272 $(mrproper-dirs):
1273 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1274
1275 mrproper: clean archmrproper $(mrproper-dirs)
1276 $(call cmd,rmdirs)
1277 $(call cmd,rmfiles)
1278
1279 # distclean
1280 #
1281 PHONY += distclean
1282
1283 distclean: mrproper
1284 @find $(srctree) $(RCS_FIND_IGNORE) \
1285 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1286 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1287 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1288 -type f -print | xargs rm -f
1289
1290
1291 # Packaging of the kernel to various formats
1292 # ---------------------------------------------------------------------------
1293 # rpm target kept for backward compatibility
1294 package-dir := scripts/package
1295
1296 %src-pkg: FORCE
1297 $(Q)$(MAKE) $(build)=$(package-dir) $@
1298 %pkg: include/config/kernel.release FORCE
1299 $(Q)$(MAKE) $(build)=$(package-dir) $@
1300 rpm: include/config/kernel.release FORCE
1301 $(Q)$(MAKE) $(build)=$(package-dir) $@
1302
1303
1304 # Brief documentation of the typical targets used
1305 # ---------------------------------------------------------------------------
1306
1307 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1308 boards := $(sort $(notdir $(boards)))
1309 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1310 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1311
1312 PHONY += help
1313 help:
1314 @echo 'Cleaning targets:'
1315 @echo ' clean - Remove most generated files but keep the config and'
1316 @echo ' enough build support to build external modules'
1317 @echo ' mrproper - Remove all generated files + config + various backup files'
1318 @echo ' distclean - mrproper + remove editor backup and patch files'
1319 @echo ''
1320 @echo 'Configuration targets:'
1321 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1322 @echo ''
1323 @echo 'Other generic targets:'
1324 @echo ' all - Build all targets marked with [*]'
1325 @echo '* vmlinux - Build the bare kernel'
1326 @echo '* modules - Build all modules'
1327 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1328 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1329 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1330 @echo ' dir/ - Build all files in dir and below'
1331 @echo ' dir/file.[ois] - Build specified target only'
1332 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1333 @echo ' (requires a recent binutils and recent build (System.map))'
1334 @echo ' dir/file.ko - Build module including final link'
1335 @echo ' modules_prepare - Set up for building external modules'
1336 @echo ' tags/TAGS - Generate tags file for editors'
1337 @echo ' cscope - Generate cscope index'
1338 @echo ' gtags - Generate GNU GLOBAL index'
1339 @echo ' kernelrelease - Output the release version string (use with make -s)'
1340 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1341 @echo ' image_name - Output the image name (use with make -s)'
1342 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1343 echo ' (default: $(INSTALL_HDR_PATH))'; \
1344 echo ''
1345 @echo 'Static analysers'
1346 @echo ' checkstack - Generate a list of stack hogs'
1347 @echo ' namespacecheck - Name space analysis on compiled kernel'
1348 @echo ' versioncheck - Sanity check on version.h usage'
1349 @echo ' includecheck - Check for duplicate included header files'
1350 @echo ' export_report - List the usages of all exported symbols'
1351 @echo ' headers_check - Sanity check on exported headers'
1352 @echo ' headerdep - Detect inclusion cycles in headers'
1353 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1354 @echo ''
1355 @echo 'Kernel selftest'
1356 @echo ' kselftest - Build and run kernel selftest (run as root)'
1357 @echo ' Build, install, and boot kernel before'
1358 @echo ' running kselftest on it'
1359 @echo ' kselftest-clean - Remove all generated kselftest files'
1360 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed'
1361 @echo ' .config.'
1362 @echo ''
1363 @echo 'Kernel packaging:'
1364 @$(MAKE) $(build)=$(package-dir) help
1365 @echo ''
1366 @echo 'Documentation targets:'
1367 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1368 @echo ''
1369 @echo 'Architecture specific targets ($(SRCARCH)):'
1370 @$(if $(archhelp),$(archhelp),\
1371 echo ' No architecture specific help defined for $(SRCARCH)')
1372 @echo ''
1373 @$(if $(boards), \
1374 $(foreach b, $(boards), \
1375 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1376 echo '')
1377 @$(if $(board-dirs), \
1378 $(foreach b, $(board-dirs), \
1379 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1380 printf " %-16s - Show all of the above\\n" help-boards; \
1381 echo '')
1382
1383 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1384 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1385 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1386 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1387 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1388 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1389 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1390 @echo ' 1: warnings which may be relevant and do not occur too often'
1391 @echo ' 2: warnings which occur quite often but may still be relevant'
1392 @echo ' 3: more obscure warnings, can most likely be ignored'
1393 @echo ' Multiple levels can be combined with W=12 or W=123'
1394 @echo ''
1395 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1396 @echo 'For further info see the ./README file'
1397
1398
1399 help-board-dirs := $(addprefix help-,$(board-dirs))
1400
1401 help-boards: $(help-board-dirs)
1402
1403 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1404
1405 $(help-board-dirs): help-%:
1406 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1407 @$(if $(boards-per-dir), \
1408 $(foreach b, $(boards-per-dir), \
1409 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1410 echo '')
1411
1412
1413 # Documentation targets
1414 # ---------------------------------------------------------------------------
1415 %docs: scripts_basic FORCE
1416 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
1417 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1418
1419 else # KBUILD_EXTMOD
1420
1421 ###
1422 # External module support.
1423 # When building external modules the kernel used as basis is considered
1424 # read-only, and no consistency checks are made and the make
1425 # system is not used on the basis kernel. If updates are required
1426 # in the basis kernel ordinary make commands (without M=...) must
1427 # be used.
1428 #
1429 # The following are the only valid targets when building external
1430 # modules.
1431 # make M=dir clean Delete all automatically generated files
1432 # make M=dir modules Make all modules in specified dir
1433 # make M=dir Same as 'make M=dir modules'
1434 # make M=dir modules_install
1435 # Install the modules built in the module directory
1436 # Assumes install directory is already created
1437
1438 # We are always building modules
1439 KBUILD_MODULES := 1
1440 PHONY += crmodverdir
1441 crmodverdir:
1442 $(cmd_crmodverdir)
1443
1444 PHONY += $(objtree)/Module.symvers
1445 $(objtree)/Module.symvers:
1446 @test -e $(objtree)/Module.symvers || ( \
1447 echo; \
1448 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1449 echo " is missing; modules will have no dependencies and modversions."; \
1450 echo )
1451
1452 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1453 PHONY += $(module-dirs) modules
1454 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1455 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1456
1457 modules: $(module-dirs)
1458 @$(kecho) ' Building modules, stage 2.';
1459 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1460
1461 PHONY += modules_install
1462 modules_install: _emodinst_ _emodinst_post
1463
1464 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1465 PHONY += _emodinst_
1466 _emodinst_:
1467 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1468 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1469
1470 PHONY += _emodinst_post
1471 _emodinst_post: _emodinst_
1472 $(call cmd,depmod)
1473
1474 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1475
1476 PHONY += $(clean-dirs) clean
1477 $(clean-dirs):
1478 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1479
1480 clean: rm-dirs := $(MODVERDIR)
1481 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1482
1483 PHONY += help
1484 help:
1485 @echo ' Building external modules.'
1486 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1487 @echo ''
1488 @echo ' modules - default target, build the module(s)'
1489 @echo ' modules_install - install the module'
1490 @echo ' clean - remove generated files in module directory only'
1491 @echo ''
1492
1493 # Dummies...
1494 PHONY += prepare scripts
1495 prepare: ;
1496 scripts: ;
1497 endif # KBUILD_EXTMOD
1498
1499 clean: $(clean-dirs)
1500 $(call cmd,rmdirs)
1501 $(call cmd,rmfiles)
1502 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1503 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1504 -o -name '*.ko.*' \
1505 -o -name '*.dwo' \
1506 -o -name '*.su' \
1507 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1508 -o -name '*.symtypes' -o -name 'modules.order' \
1509 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1510 -o -name '*.gcno' \) -type f -print | xargs rm -f
1511
1512 # Generate tags for editors
1513 # ---------------------------------------------------------------------------
1514 quiet_cmd_tags = GEN $@
1515 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1516
1517 tags TAGS cscope gtags: FORCE
1518 $(call cmd,tags)
1519
1520 # Scripts to check various things for consistency
1521 # ---------------------------------------------------------------------------
1522
1523 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1524
1525 includecheck:
1526 find $(srctree)/* $(RCS_FIND_IGNORE) \
1527 -name '*.[hcS]' -type f -print | sort \
1528 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1529
1530 versioncheck:
1531 find $(srctree)/* $(RCS_FIND_IGNORE) \
1532 -name '*.[hcS]' -type f -print | sort \
1533 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1534
1535 coccicheck:
1536 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1537
1538 namespacecheck:
1539 $(PERL) $(srctree)/scripts/namespace.pl
1540
1541 export_report:
1542 $(PERL) $(srctree)/scripts/export_report.pl
1543
1544 endif #ifeq ($(config-targets),1)
1545 endif #ifeq ($(mixed-targets),1)
1546
1547 PHONY += checkstack kernelrelease kernelversion image_name
1548
1549 # UML needs a little special treatment here. It wants to use the host
1550 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1551 # else wants $(ARCH), including people doing cross-builds, which means
1552 # that $(SUBARCH) doesn't work here.
1553 ifeq ($(ARCH), um)
1554 CHECKSTACK_ARCH := $(SUBARCH)
1555 else
1556 CHECKSTACK_ARCH := $(ARCH)
1557 endif
1558 checkstack:
1559 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1560 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1561
1562 kernelrelease:
1563 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1564
1565 kernelversion:
1566 @echo $(KERNELVERSION)
1567
1568 image_name:
1569 @echo $(KBUILD_IMAGE)
1570
1571 # Clear a bunch of variables before executing the submake
1572 tools/: FORCE
1573 $(Q)mkdir -p $(objtree)/tools
1574 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
1575
1576 tools/%: FORCE
1577 $(Q)mkdir -p $(objtree)/tools
1578 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
1579
1580 # Single targets
1581 # ---------------------------------------------------------------------------
1582 # Single targets are compatible with:
1583 # - build with mixed source and output
1584 # - build with separate output dir 'make O=...'
1585 # - external modules
1586 #
1587 # target-dir => where to store outputfile
1588 # build-dir => directory in kernel source tree to use
1589
1590 ifeq ($(KBUILD_EXTMOD),)
1591 build-dir = $(patsubst %/,%,$(dir $@))
1592 target-dir = $(dir $@)
1593 else
1594 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1595 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1596 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1597 endif
1598
1599 %.s: %.c prepare scripts FORCE
1600 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1601 %.i: %.c prepare scripts FORCE
1602 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1603 %.o: %.c prepare scripts FORCE
1604 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1605 %.lst: %.c prepare scripts FORCE
1606 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1607 %.s: %.S prepare scripts FORCE
1608 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1609 %.o: %.S prepare scripts FORCE
1610 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1611 %.symtypes: %.c prepare scripts FORCE
1612 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1613
1614 # Modules
1615 /: prepare scripts FORCE
1616 $(cmd_crmodverdir)
1617 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1618 $(build)=$(build-dir)
1619 # Make sure the latest headers are built for Documentation
1620 Documentation/: headers_install
1621 %/: prepare scripts FORCE
1622 $(cmd_crmodverdir)
1623 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1624 $(build)=$(build-dir)
1625 %.ko: prepare scripts FORCE
1626 $(cmd_crmodverdir)
1627 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1628 $(build)=$(build-dir) $(@:.ko=.o)
1629 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1630
1631 # FIXME Should go into a make.lib or something
1632 # ===========================================================================
1633
1634 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1635 cmd_rmdirs = rm -rf $(rm-dirs)
1636
1637 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1638 cmd_rmfiles = rm -f $(rm-files)
1639
1640 # Run depmod only if we have System.map and depmod is executable
1641 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1642 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1643 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1644
1645 # Create temporary dir for module support files
1646 # clean it up only when building all modules
1647 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1648 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1649
1650 # read all saved command lines
1651
1652 targets := $(wildcard $(sort $(targets)))
1653 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1654
1655 ifneq ($(cmd_files),)
1656 $(cmd_files): ; # Do not try to update included dependency files
1657 include $(cmd_files)
1658 endif
1659
1660 endif # skip-makefile
1661
1662 PHONY += FORCE
1663 FORCE:
1664
1665 # Declare the contents of the .PHONY variable as phony. We keep that
1666 # information in a variable so we can use it in if_changed and friends.
1667 .PHONY: $(PHONY)