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1 VERSION = 4
2 PATCHLEVEL = 8
3 SUBLEVEL = 0
4 EXTRAVERSION = -rc2
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 NOSTDINC_FLAGS =
367 CFLAGS_MODULE =
368 AFLAGS_MODULE =
369 LDFLAGS_MODULE =
370 CFLAGS_KERNEL =
371 AFLAGS_KERNEL =
372 LDFLAGS_vmlinux =
373 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im
374 CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,)
375
376
377 # Use USERINCLUDE when you must reference the UAPI directories only.
378 USERINCLUDE := \
379 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
380 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
381 -I$(srctree)/include/uapi \
382 -I$(objtree)/include/generated/uapi \
383 -include $(srctree)/include/linux/kconfig.h
384
385 # Use LINUXINCLUDE when you must reference the include/ directory.
386 # Needed to be compatible with the O= option
387 LINUXINCLUDE := \
388 -I$(srctree)/arch/$(hdr-arch)/include \
389 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
390 -I$(objtree)/arch/$(hdr-arch)/include/generated \
391 $(if $(KBUILD_SRC), -I$(srctree)/include) \
392 -I$(objtree)/include
393
394 LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE))
395
396 KBUILD_CPPFLAGS := -D__KERNEL__
397
398 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
399 -fno-strict-aliasing -fno-common \
400 -Werror-implicit-function-declaration \
401 -Wno-format-security \
402 -std=gnu89
403
404 KBUILD_AFLAGS_KERNEL :=
405 KBUILD_CFLAGS_KERNEL :=
406 KBUILD_AFLAGS := -D__ASSEMBLY__
407 KBUILD_AFLAGS_MODULE := -DMODULE
408 KBUILD_CFLAGS_MODULE := -DMODULE
409 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
410
411 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
412 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
413 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
414
415 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
416 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
417 export CPP AR NM STRIP OBJCOPY OBJDUMP
418 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
419 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
420
421 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
422 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
423 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
424 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
425 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
426 export KBUILD_ARFLAGS
427
428 # When compiling out-of-tree modules, put MODVERDIR in the module
429 # tree rather than in the kernel tree. The kernel tree might
430 # even be read-only.
431 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
432
433 # Files to ignore in find ... statements
434
435 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
436 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
437 -prune -o
438 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
439 --exclude CVS --exclude .pc --exclude .hg --exclude .git
440
441 # ===========================================================================
442 # Rules shared between *config targets and build targets
443
444 # Basic helpers built in scripts/
445 PHONY += scripts_basic
446 scripts_basic:
447 $(Q)$(MAKE) $(build)=scripts/basic
448 $(Q)rm -f .tmp_quiet_recordmcount
449
450 # To avoid any implicit rule to kick in, define an empty command.
451 scripts/basic/%: scripts_basic ;
452
453 PHONY += outputmakefile
454 # outputmakefile generates a Makefile in the output directory, if using a
455 # separate output directory. This allows convenient use of make in the
456 # output directory.
457 outputmakefile:
458 ifneq ($(KBUILD_SRC),)
459 $(Q)ln -fsn $(srctree) source
460 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
461 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
462 endif
463
464 # Support for using generic headers in asm-generic
465 PHONY += asm-generic
466 asm-generic:
467 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
468 src=asm obj=arch/$(SRCARCH)/include/generated/asm
469 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
470 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
471
472 # To make sure we do not include .config for any of the *config targets
473 # catch them early, and hand them over to scripts/kconfig/Makefile
474 # It is allowed to specify more targets when calling make, including
475 # mixing *config targets and build targets.
476 # For example 'make oldconfig all'.
477 # Detect when mixed targets is specified, and make a second invocation
478 # of make so .config is not included in this case either (for *config).
479
480 version_h := include/generated/uapi/linux/version.h
481 old_version_h := include/linux/version.h
482
483 no-dot-config-targets := clean mrproper distclean \
484 cscope gtags TAGS tags help% %docs check% coccicheck \
485 $(version_h) headers_% archheaders archscripts \
486 kernelversion %src-pkg
487
488 config-targets := 0
489 mixed-targets := 0
490 dot-config := 1
491
492 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
493 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
494 dot-config := 0
495 endif
496 endif
497
498 ifeq ($(KBUILD_EXTMOD),)
499 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
500 config-targets := 1
501 ifneq ($(words $(MAKECMDGOALS)),1)
502 mixed-targets := 1
503 endif
504 endif
505 endif
506 # install and module_install need also be processed one by one
507 ifneq ($(filter install,$(MAKECMDGOALS)),)
508 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
509 mixed-targets := 1
510 endif
511 endif
512
513 ifeq ($(mixed-targets),1)
514 # ===========================================================================
515 # We're called with mixed targets (*config and build targets).
516 # Handle them one by one.
517
518 PHONY += $(MAKECMDGOALS) __build_one_by_one
519
520 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
521 @:
522
523 __build_one_by_one:
524 $(Q)set -e; \
525 for i in $(MAKECMDGOALS); do \
526 $(MAKE) -f $(srctree)/Makefile $$i; \
527 done
528
529 else
530 ifeq ($(config-targets),1)
531 # ===========================================================================
532 # *config targets only - make sure prerequisites are updated, and descend
533 # in scripts/kconfig to make the *config target
534
535 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
536 # KBUILD_DEFCONFIG may point out an alternative default configuration
537 # used for 'make defconfig'
538 include arch/$(SRCARCH)/Makefile
539 export KBUILD_DEFCONFIG KBUILD_KCONFIG
540
541 config: scripts_basic outputmakefile FORCE
542 $(Q)$(MAKE) $(build)=scripts/kconfig $@
543
544 %config: scripts_basic outputmakefile FORCE
545 $(Q)$(MAKE) $(build)=scripts/kconfig $@
546
547 else
548 # ===========================================================================
549 # Build targets only - this includes vmlinux, arch specific targets, clean
550 # targets and others. In general all targets except *config targets.
551
552 ifeq ($(KBUILD_EXTMOD),)
553 # Additional helpers built in scripts/
554 # Carefully list dependencies so we do not try to build scripts twice
555 # in parallel
556 PHONY += scripts
557 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
558 asm-generic gcc-plugins
559 $(Q)$(MAKE) $(build)=$(@)
560
561 # Objects we will link into vmlinux / subdirs we need to visit
562 init-y := init/
563 drivers-y := drivers/ sound/ firmware/
564 net-y := net/
565 libs-y := lib/
566 core-y := usr/
567 virt-y := virt/
568 endif # KBUILD_EXTMOD
569
570 ifeq ($(dot-config),1)
571 # Read in config
572 -include include/config/auto.conf
573
574 ifeq ($(KBUILD_EXTMOD),)
575 # Read in dependencies to all Kconfig* files, make sure to run
576 # oldconfig if changes are detected.
577 -include include/config/auto.conf.cmd
578
579 # To avoid any implicit rule to kick in, define an empty command
580 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
581
582 # If .config is newer than include/config/auto.conf, someone tinkered
583 # with it and forgot to run make oldconfig.
584 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
585 # we execute the config step to be sure to catch updated Kconfig files
586 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
587 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
588 else
589 # external modules needs include/generated/autoconf.h and include/config/auto.conf
590 # but do not care if they are up-to-date. Use auto.conf to trigger the test
591 PHONY += include/config/auto.conf
592
593 include/config/auto.conf:
594 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
595 echo >&2; \
596 echo >&2 " ERROR: Kernel configuration is invalid."; \
597 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
598 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
599 echo >&2 ; \
600 /bin/false)
601
602 endif # KBUILD_EXTMOD
603
604 else
605 # Dummy target needed, because used as prerequisite
606 include/config/auto.conf: ;
607 endif # $(dot-config)
608
609 # The all: target is the default when no target is given on the
610 # command line.
611 # This allow a user to issue only 'make' to build a kernel including modules
612 # Defaults to vmlinux, but the arch makefile usually adds further targets
613 all: vmlinux
614
615 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
616 # values of the respective KBUILD_* variables
617 ARCH_CPPFLAGS :=
618 ARCH_AFLAGS :=
619 ARCH_CFLAGS :=
620 include arch/$(SRCARCH)/Makefile
621
622 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
623 KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
624
625 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
626 KBUILD_CFLAGS += -Os
627 else
628 ifdef CONFIG_PROFILE_ALL_BRANCHES
629 KBUILD_CFLAGS += -O2
630 else
631 KBUILD_CFLAGS += -O2
632 endif
633 endif
634
635 # Tell gcc to never replace conditional load with a non-conditional one
636 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
637
638 include scripts/Makefile.gcc-plugins
639
640 ifdef CONFIG_READABLE_ASM
641 # Disable optimizations that make assembler listings hard to read.
642 # reorder blocks reorders the control in the function
643 # ipa clone creates specialized cloned functions
644 # partial inlining inlines only parts of functions
645 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
646 $(call cc-option,-fno-ipa-cp-clone,) \
647 $(call cc-option,-fno-partial-inlining)
648 endif
649
650 ifneq ($(CONFIG_FRAME_WARN),0)
651 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
652 endif
653
654 # This selects the stack protector compiler flag. Testing it is delayed
655 # until after .config has been reprocessed, in the prepare-compiler-check
656 # target.
657 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
658 stackp-flag := -fstack-protector
659 stackp-name := REGULAR
660 else
661 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
662 stackp-flag := -fstack-protector-strong
663 stackp-name := STRONG
664 else
665 # Force off for distro compilers that enable stack protector by default.
666 stackp-flag := $(call cc-option, -fno-stack-protector)
667 endif
668 endif
669 # Find arch-specific stack protector compiler sanity-checking script.
670 ifdef CONFIG_CC_STACKPROTECTOR
671 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
672 stackp-check := $(wildcard $(stackp-path))
673 endif
674 KBUILD_CFLAGS += $(stackp-flag)
675
676 ifeq ($(cc-name),clang)
677 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
678 KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
679 KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
680 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
681 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
682 # Quiet clang warning: comparison of unsigned expression < 0 is always false
683 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
684 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
685 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
686 # See modpost pattern 2
687 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
688 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
689 else
690
691 # These warnings generated too much noise in a regular build.
692 # Use make W=1 to enable them (see scripts/Makefile.build)
693 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
694 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
695 endif
696
697 ifdef CONFIG_FRAME_POINTER
698 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
699 else
700 # Some targets (ARM with Thumb2, for example), can't be built with frame
701 # pointers. For those, we don't have FUNCTION_TRACER automatically
702 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
703 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
704 # -fomit-frame-pointer with FUNCTION_TRACER.
705 ifndef CONFIG_FUNCTION_TRACER
706 KBUILD_CFLAGS += -fomit-frame-pointer
707 endif
708 endif
709
710 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
711
712 ifdef CONFIG_DEBUG_INFO
713 ifdef CONFIG_DEBUG_INFO_SPLIT
714 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
715 else
716 KBUILD_CFLAGS += -g
717 endif
718 KBUILD_AFLAGS += -Wa,-gdwarf-2
719 endif
720 ifdef CONFIG_DEBUG_INFO_DWARF4
721 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
722 endif
723
724 ifdef CONFIG_DEBUG_INFO_REDUCED
725 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
726 $(call cc-option,-fno-var-tracking)
727 endif
728
729 ifdef CONFIG_FUNCTION_TRACER
730 ifndef CC_FLAGS_FTRACE
731 CC_FLAGS_FTRACE := -pg
732 endif
733 export CC_FLAGS_FTRACE
734 ifdef CONFIG_HAVE_FENTRY
735 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
736 endif
737 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
738 KBUILD_AFLAGS += $(CC_USING_FENTRY)
739 ifdef CONFIG_DYNAMIC_FTRACE
740 ifdef CONFIG_HAVE_C_RECORDMCOUNT
741 BUILD_C_RECORDMCOUNT := y
742 export BUILD_C_RECORDMCOUNT
743 endif
744 endif
745 endif
746
747 # We trigger additional mismatches with less inlining
748 ifdef CONFIG_DEBUG_SECTION_MISMATCH
749 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
750 endif
751
752 # arch Makefile may override CC so keep this after arch Makefile is included
753 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
754 CHECKFLAGS += $(NOSTDINC_FLAGS)
755
756 # warn about C99 declaration after statement
757 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
758
759 # disable pointer signed / unsigned warnings in gcc 4.0
760 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
761
762 # disable invalid "can't wrap" optimizations for signed / pointers
763 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
764
765 # conserve stack if available
766 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
767
768 # disallow errors like 'EXPORT_GPL(foo);' with missing header
769 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
770
771 # require functions to have arguments in prototypes, not empty 'int foo()'
772 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
773
774 # Prohibit date/time macros, which would make the build non-deterministic
775 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
776
777 # enforce correct pointer usage
778 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
779
780 # use the deterministic mode of AR if available
781 KBUILD_ARFLAGS := $(call ar-option,D)
782
783 # check for 'asm goto'
784 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
785 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
786 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
787 endif
788
789 include scripts/Makefile.kasan
790 include scripts/Makefile.extrawarn
791 include scripts/Makefile.ubsan
792
793 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
794 # last assignments
795 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
796 KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
797 KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
798
799 # Use --build-id when available.
800 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
801 $(call cc-ldoption, -Wl$(comma)--build-id,))
802 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
803 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
804
805 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
806 LDFLAGS_vmlinux += $(call ld-option, -X,)
807 endif
808
809 # Default kernel image to build when no specific target is given.
810 # KBUILD_IMAGE may be overruled on the command line or
811 # set in the environment
812 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
813 # this default value
814 export KBUILD_IMAGE ?= vmlinux
815
816 #
817 # INSTALL_PATH specifies where to place the updated kernel and system map
818 # images. Default is /boot, but you can set it to other values
819 export INSTALL_PATH ?= /boot
820
821 #
822 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
823 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
824 # an argument if needed. Otherwise it defaults to the kernel install path
825 #
826 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
827
828 #
829 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
830 # relocations required by build roots. This is not defined in the
831 # makefile but the argument can be passed to make if needed.
832 #
833
834 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
835 export MODLIB
836
837 #
838 # INSTALL_MOD_STRIP, if defined, will cause modules to be
839 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
840 # the default option --strip-debug will be used. Otherwise,
841 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
842
843 ifdef INSTALL_MOD_STRIP
844 ifeq ($(INSTALL_MOD_STRIP),1)
845 mod_strip_cmd = $(STRIP) --strip-debug
846 else
847 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
848 endif # INSTALL_MOD_STRIP=1
849 else
850 mod_strip_cmd = true
851 endif # INSTALL_MOD_STRIP
852 export mod_strip_cmd
853
854 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
855 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
856 # or CONFIG_MODULE_COMPRESS_XZ.
857
858 mod_compress_cmd = true
859 ifdef CONFIG_MODULE_COMPRESS
860 ifdef CONFIG_MODULE_COMPRESS_GZIP
861 mod_compress_cmd = gzip -n -f
862 endif # CONFIG_MODULE_COMPRESS_GZIP
863 ifdef CONFIG_MODULE_COMPRESS_XZ
864 mod_compress_cmd = xz -f
865 endif # CONFIG_MODULE_COMPRESS_XZ
866 endif # CONFIG_MODULE_COMPRESS
867 export mod_compress_cmd
868
869 # Select initial ramdisk compression format, default is gzip(1).
870 # This shall be used by the dracut(8) tool while creating an initramfs image.
871 #
872 INITRD_COMPRESS-y := gzip
873 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
874 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
875 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
876 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
877 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
878 # do not export INITRD_COMPRESS, since we didn't actually
879 # choose a sane default compression above.
880 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
881
882 ifdef CONFIG_MODULE_SIG_ALL
883 $(eval $(call config_filename,MODULE_SIG_KEY))
884
885 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
886 else
887 mod_sign_cmd = true
888 endif
889 export mod_sign_cmd
890
891
892 ifeq ($(KBUILD_EXTMOD),)
893 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
894
895 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
896 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
897 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
898
899 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
900 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
901
902 init-y := $(patsubst %/, %/built-in.o, $(init-y))
903 core-y := $(patsubst %/, %/built-in.o, $(core-y))
904 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
905 net-y := $(patsubst %/, %/built-in.o, $(net-y))
906 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
907 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
908 libs-y := $(libs-y1) $(libs-y2)
909 virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
910
911 # Externally visible symbols (used by link-vmlinux.sh)
912 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
913 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
914 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
915 export LDFLAGS_vmlinux
916 # used by scripts/pacmage/Makefile
917 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
918
919 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
920
921 # Include targets which we want to execute sequentially if the rest of the
922 # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
923 # evaluated more than once.
924 PHONY += vmlinux_prereq
925 vmlinux_prereq: $(vmlinux-deps) FORCE
926 ifdef CONFIG_HEADERS_CHECK
927 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
928 endif
929 ifdef CONFIG_BUILD_DOCSRC
930 $(Q)$(MAKE) $(build)=Documentation
931 endif
932 ifdef CONFIG_GDB_SCRIPTS
933 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
934 endif
935 ifdef CONFIG_TRIM_UNUSED_KSYMS
936 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
937 "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq"
938 endif
939
940 # standalone target for easier testing
941 include/generated/autoksyms.h: FORCE
942 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
943
944 # Final link of vmlinux
945 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
946 quiet_cmd_link-vmlinux = LINK $@
947
948 vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
949 +$(call if_changed,link-vmlinux)
950
951 # Build samples along the rest of the kernel
952 ifdef CONFIG_SAMPLES
953 vmlinux-dirs += samples
954 endif
955
956 # The actual objects are generated when descending,
957 # make sure no implicit rule kicks in
958 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
959
960 # Handle descending into subdirectories listed in $(vmlinux-dirs)
961 # Preset locale variables to speed up the build process. Limit locale
962 # tweaks to this spot to avoid wrong language settings when running
963 # make menuconfig etc.
964 # Error messages still appears in the original language
965
966 PHONY += $(vmlinux-dirs)
967 $(vmlinux-dirs): prepare scripts
968 $(Q)$(MAKE) $(build)=$@
969
970 define filechk_kernel.release
971 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
972 endef
973
974 # Store (new) KERNELRELEASE string in include/config/kernel.release
975 include/config/kernel.release: include/config/auto.conf FORCE
976 $(call filechk,kernel.release)
977
978
979 # Things we need to do before we recursively start building the kernel
980 # or the modules are listed in "prepare".
981 # A multi level approach is used. prepareN is processed before prepareN-1.
982 # archprepare is used in arch Makefiles and when processed asm symlink,
983 # version.h and scripts_basic is processed / created.
984
985 # Listed in dependency order
986 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
987
988 # prepare3 is used to check if we are building in a separate output directory,
989 # and if so do:
990 # 1) Check that make has not been executed in the kernel src $(srctree)
991 prepare3: include/config/kernel.release
992 ifneq ($(KBUILD_SRC),)
993 @$(kecho) ' Using $(srctree) as source for kernel'
994 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
995 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
996 echo >&2 " in the '$(srctree)' directory.";\
997 /bin/false; \
998 fi;
999 endif
1000
1001 # prepare2 creates a makefile if using a separate output directory.
1002 # From this point forward, .config has been reprocessed, so any rules
1003 # that need to depend on updated CONFIG_* values can be checked here.
1004 prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
1005
1006 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
1007 include/config/auto.conf
1008 $(cmd_crmodverdir)
1009 $(Q)test -e include/generated/autoksyms.h || \
1010 touch include/generated/autoksyms.h
1011
1012 archprepare: archheaders archscripts prepare1 scripts_basic
1013
1014 prepare0: archprepare gcc-plugins
1015 $(Q)$(MAKE) $(build)=.
1016
1017 # All the preparing..
1018 prepare: prepare0 prepare-objtool
1019
1020 ifdef CONFIG_STACK_VALIDATION
1021 has_libelf := $(call try-run,\
1022 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
1023 ifeq ($(has_libelf),1)
1024 objtool_target := tools/objtool FORCE
1025 else
1026 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
1027 SKIP_STACK_VALIDATION := 1
1028 export SKIP_STACK_VALIDATION
1029 endif
1030 endif
1031
1032 PHONY += prepare-objtool
1033 prepare-objtool: $(objtool_target)
1034
1035 # Check for CONFIG flags that require compiler support. Abort the build
1036 # after .config has been processed, but before the kernel build starts.
1037 #
1038 # For security-sensitive CONFIG options, we don't want to fallback and/or
1039 # silently change which compiler flags will be used, since that leads to
1040 # producing kernels with different security feature characteristics
1041 # depending on the compiler used. (For example, "But I selected
1042 # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1043 PHONY += prepare-compiler-check
1044 prepare-compiler-check: FORCE
1045 # Make sure compiler supports requested stack protector flag.
1046 ifdef stackp-name
1047 ifeq ($(call cc-option, $(stackp-flag)),)
1048 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1049 $(stackp-flag) not supported by compiler >&2 && exit 1
1050 endif
1051 endif
1052 # Make sure compiler does not have buggy stack-protector support.
1053 ifdef stackp-check
1054 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
1055 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1056 $(stackp-flag) available but compiler is broken >&2 && exit 1
1057 endif
1058 endif
1059 @:
1060
1061 # Generate some files
1062 # ---------------------------------------------------------------------------
1063
1064 # KERNELRELEASE can change from a few different places, meaning version.h
1065 # needs to be updated, so this check is forced on all builds
1066
1067 uts_len := 64
1068 define filechk_utsrelease.h
1069 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1070 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1071 exit 1; \
1072 fi; \
1073 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1074 endef
1075
1076 define filechk_version.h
1077 (echo \#define LINUX_VERSION_CODE $(shell \
1078 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1079 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1080 endef
1081
1082 $(version_h): $(srctree)/Makefile FORCE
1083 $(call filechk,version.h)
1084 $(Q)rm -f $(old_version_h)
1085
1086 include/generated/utsrelease.h: include/config/kernel.release FORCE
1087 $(call filechk,utsrelease.h)
1088
1089 PHONY += headerdep
1090 headerdep:
1091 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1092 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1093
1094 # ---------------------------------------------------------------------------
1095 # Firmware install
1096 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1097 export INSTALL_FW_PATH
1098
1099 PHONY += firmware_install
1100 firmware_install:
1101 @mkdir -p $(objtree)/firmware
1102 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1103
1104 # ---------------------------------------------------------------------------
1105 # Kernel headers
1106
1107 #Default location for installed headers
1108 export INSTALL_HDR_PATH = $(objtree)/usr
1109
1110 # If we do an all arch process set dst to asm-$(hdr-arch)
1111 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1112
1113 PHONY += archheaders
1114 archheaders:
1115
1116 PHONY += archscripts
1117 archscripts:
1118
1119 PHONY += __headers
1120 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts
1121 $(Q)$(MAKE) $(build)=scripts build_unifdef
1122
1123 PHONY += headers_install_all
1124 headers_install_all:
1125 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1126
1127 PHONY += headers_install
1128 headers_install: __headers
1129 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1130 $(error Headers not exportable for the $(SRCARCH) architecture))
1131 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1132 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
1133
1134 PHONY += headers_check_all
1135 headers_check_all: headers_install_all
1136 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1137
1138 PHONY += headers_check
1139 headers_check: headers_install
1140 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1141 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
1142
1143 # ---------------------------------------------------------------------------
1144 # Kernel selftest
1145
1146 PHONY += kselftest
1147 kselftest:
1148 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1149
1150 kselftest-clean:
1151 $(Q)$(MAKE) -C tools/testing/selftests clean
1152
1153 PHONY += kselftest-merge
1154 kselftest-merge:
1155 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1156 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1157 -m $(objtree)/.config \
1158 $(srctree)/tools/testing/selftests/*/config
1159 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1160
1161 # ---------------------------------------------------------------------------
1162 # Modules
1163
1164 ifdef CONFIG_MODULES
1165
1166 # By default, build modules as well
1167
1168 all: modules
1169
1170 # Build modules
1171 #
1172 # A module can be listed more than once in obj-m resulting in
1173 # duplicate lines in modules.order files. Those are removed
1174 # using awk while concatenating to the final file.
1175
1176 PHONY += modules
1177 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1178 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1179 @$(kecho) ' Building modules, stage 2.';
1180 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1181 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1182
1183 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1184 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1185
1186 %/modules.builtin: include/config/auto.conf
1187 $(Q)$(MAKE) $(modbuiltin)=$*
1188
1189
1190 # Target to prepare building external modules
1191 PHONY += modules_prepare
1192 modules_prepare: prepare scripts
1193
1194 # Target to install modules
1195 PHONY += modules_install
1196 modules_install: _modinst_ _modinst_post
1197
1198 PHONY += _modinst_
1199 _modinst_:
1200 @rm -rf $(MODLIB)/kernel
1201 @rm -f $(MODLIB)/source
1202 @mkdir -p $(MODLIB)/kernel
1203 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1204 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1205 rm -f $(MODLIB)/build ; \
1206 ln -s $(CURDIR) $(MODLIB)/build ; \
1207 fi
1208 @cp -f $(objtree)/modules.order $(MODLIB)/
1209 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1210 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1211
1212 # This depmod is only for convenience to give the initial
1213 # boot a modules.dep even before / is mounted read-write. However the
1214 # boot script depmod is the master version.
1215 PHONY += _modinst_post
1216 _modinst_post: _modinst_
1217 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1218 $(call cmd,depmod)
1219
1220 ifeq ($(CONFIG_MODULE_SIG), y)
1221 PHONY += modules_sign
1222 modules_sign:
1223 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1224 endif
1225
1226 else # CONFIG_MODULES
1227
1228 # Modules not configured
1229 # ---------------------------------------------------------------------------
1230
1231 PHONY += modules modules_install
1232 modules modules_install:
1233 @echo >&2
1234 @echo >&2 "The present kernel configuration has modules disabled."
1235 @echo >&2 "Type 'make config' and enable loadable module support."
1236 @echo >&2 "Then build a kernel with module support enabled."
1237 @echo >&2
1238 @exit 1
1239
1240 endif # CONFIG_MODULES
1241
1242 ###
1243 # Cleaning is done on three levels.
1244 # make clean Delete most generated files
1245 # Leave enough to build external modules
1246 # make mrproper Delete the current configuration, and all generated files
1247 # make distclean Remove editor backup files, patch leftover files and the like
1248
1249 # Directories & files removed with 'make clean'
1250 CLEAN_DIRS += $(MODVERDIR)
1251
1252 # Directories & files removed with 'make mrproper'
1253 MRPROPER_DIRS += include/config usr/include include/generated \
1254 arch/*/include/generated .tmp_objdiff
1255 MRPROPER_FILES += .config .config.old .version .old_version \
1256 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1257 signing_key.pem signing_key.priv signing_key.x509 \
1258 x509.genkey extra_certificates signing_key.x509.keyid \
1259 signing_key.x509.signer vmlinux-gdb.py
1260
1261 # clean - Delete most, but leave enough to build external modules
1262 #
1263 clean: rm-dirs := $(CLEAN_DIRS)
1264 clean: rm-files := $(CLEAN_FILES)
1265 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1266
1267 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1268 $(clean-dirs):
1269 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1270
1271 vmlinuxclean:
1272 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1273
1274 clean: archclean vmlinuxclean
1275
1276 # mrproper - Delete all generated files, including .config
1277 #
1278 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1279 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1280 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1281
1282 PHONY += $(mrproper-dirs) mrproper archmrproper
1283 $(mrproper-dirs):
1284 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1285
1286 mrproper: clean archmrproper $(mrproper-dirs)
1287 $(call cmd,rmdirs)
1288 $(call cmd,rmfiles)
1289
1290 # distclean
1291 #
1292 PHONY += distclean
1293
1294 distclean: mrproper
1295 @find $(srctree) $(RCS_FIND_IGNORE) \
1296 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1297 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1298 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1299 -type f -print | xargs rm -f
1300
1301
1302 # Packaging of the kernel to various formats
1303 # ---------------------------------------------------------------------------
1304 # rpm target kept for backward compatibility
1305 package-dir := scripts/package
1306
1307 %src-pkg: FORCE
1308 $(Q)$(MAKE) $(build)=$(package-dir) $@
1309 %pkg: include/config/kernel.release FORCE
1310 $(Q)$(MAKE) $(build)=$(package-dir) $@
1311 rpm: include/config/kernel.release FORCE
1312 $(Q)$(MAKE) $(build)=$(package-dir) $@
1313
1314
1315 # Brief documentation of the typical targets used
1316 # ---------------------------------------------------------------------------
1317
1318 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1319 boards := $(sort $(notdir $(boards)))
1320 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1321 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1322
1323 PHONY += help
1324 help:
1325 @echo 'Cleaning targets:'
1326 @echo ' clean - Remove most generated files but keep the config and'
1327 @echo ' enough build support to build external modules'
1328 @echo ' mrproper - Remove all generated files + config + various backup files'
1329 @echo ' distclean - mrproper + remove editor backup and patch files'
1330 @echo ''
1331 @echo 'Configuration targets:'
1332 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1333 @echo ''
1334 @echo 'Other generic targets:'
1335 @echo ' all - Build all targets marked with [*]'
1336 @echo '* vmlinux - Build the bare kernel'
1337 @echo '* modules - Build all modules'
1338 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1339 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1340 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1341 @echo ' dir/ - Build all files in dir and below'
1342 @echo ' dir/file.[ois] - Build specified target only'
1343 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1344 @echo ' (requires a recent binutils and recent build (System.map))'
1345 @echo ' dir/file.ko - Build module including final link'
1346 @echo ' modules_prepare - Set up for building external modules'
1347 @echo ' tags/TAGS - Generate tags file for editors'
1348 @echo ' cscope - Generate cscope index'
1349 @echo ' gtags - Generate GNU GLOBAL index'
1350 @echo ' kernelrelease - Output the release version string (use with make -s)'
1351 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1352 @echo ' image_name - Output the image name (use with make -s)'
1353 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1354 echo ' (default: $(INSTALL_HDR_PATH))'; \
1355 echo ''
1356 @echo 'Static analysers'
1357 @echo ' checkstack - Generate a list of stack hogs'
1358 @echo ' namespacecheck - Name space analysis on compiled kernel'
1359 @echo ' versioncheck - Sanity check on version.h usage'
1360 @echo ' includecheck - Check for duplicate included header files'
1361 @echo ' export_report - List the usages of all exported symbols'
1362 @echo ' headers_check - Sanity check on exported headers'
1363 @echo ' headerdep - Detect inclusion cycles in headers'
1364 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1365 @echo ''
1366 @echo 'Kernel selftest'
1367 @echo ' kselftest - Build and run kernel selftest (run as root)'
1368 @echo ' Build, install, and boot kernel before'
1369 @echo ' running kselftest on it'
1370 @echo ' kselftest-clean - Remove all generated kselftest files'
1371 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed'
1372 @echo ' .config.'
1373 @echo ''
1374 @echo 'Kernel packaging:'
1375 @$(MAKE) $(build)=$(package-dir) help
1376 @echo ''
1377 @echo 'Documentation targets:'
1378 @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp
1379 @echo ''
1380 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1381 @echo ''
1382 @echo 'Architecture specific targets ($(SRCARCH)):'
1383 @$(if $(archhelp),$(archhelp),\
1384 echo ' No architecture specific help defined for $(SRCARCH)')
1385 @echo ''
1386 @$(if $(boards), \
1387 $(foreach b, $(boards), \
1388 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1389 echo '')
1390 @$(if $(board-dirs), \
1391 $(foreach b, $(board-dirs), \
1392 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1393 printf " %-16s - Show all of the above\\n" help-boards; \
1394 echo '')
1395
1396 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1397 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1398 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1399 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1400 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1401 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1402 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1403 @echo ' 1: warnings which may be relevant and do not occur too often'
1404 @echo ' 2: warnings which occur quite often but may still be relevant'
1405 @echo ' 3: more obscure warnings, can most likely be ignored'
1406 @echo ' Multiple levels can be combined with W=12 or W=123'
1407 @echo ''
1408 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1409 @echo 'For further info see the ./README file'
1410
1411
1412 help-board-dirs := $(addprefix help-,$(board-dirs))
1413
1414 help-boards: $(help-board-dirs)
1415
1416 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1417
1418 $(help-board-dirs): help-%:
1419 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1420 @$(if $(boards-per-dir), \
1421 $(foreach b, $(boards-per-dir), \
1422 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1423 echo '')
1424
1425
1426 # Documentation targets
1427 # ---------------------------------------------------------------------------
1428 DOC_TARGETS := xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs
1429 PHONY += $(DOC_TARGETS)
1430 $(DOC_TARGETS): scripts_basic FORCE
1431 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
1432 $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@
1433 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1434
1435 else # KBUILD_EXTMOD
1436
1437 ###
1438 # External module support.
1439 # When building external modules the kernel used as basis is considered
1440 # read-only, and no consistency checks are made and the make
1441 # system is not used on the basis kernel. If updates are required
1442 # in the basis kernel ordinary make commands (without M=...) must
1443 # be used.
1444 #
1445 # The following are the only valid targets when building external
1446 # modules.
1447 # make M=dir clean Delete all automatically generated files
1448 # make M=dir modules Make all modules in specified dir
1449 # make M=dir Same as 'make M=dir modules'
1450 # make M=dir modules_install
1451 # Install the modules built in the module directory
1452 # Assumes install directory is already created
1453
1454 # We are always building modules
1455 KBUILD_MODULES := 1
1456 PHONY += crmodverdir
1457 crmodverdir:
1458 $(cmd_crmodverdir)
1459
1460 PHONY += $(objtree)/Module.symvers
1461 $(objtree)/Module.symvers:
1462 @test -e $(objtree)/Module.symvers || ( \
1463 echo; \
1464 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1465 echo " is missing; modules will have no dependencies and modversions."; \
1466 echo )
1467
1468 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1469 PHONY += $(module-dirs) modules
1470 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1471 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1472
1473 modules: $(module-dirs)
1474 @$(kecho) ' Building modules, stage 2.';
1475 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1476
1477 PHONY += modules_install
1478 modules_install: _emodinst_ _emodinst_post
1479
1480 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1481 PHONY += _emodinst_
1482 _emodinst_:
1483 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1484 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1485
1486 PHONY += _emodinst_post
1487 _emodinst_post: _emodinst_
1488 $(call cmd,depmod)
1489
1490 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1491
1492 PHONY += $(clean-dirs) clean
1493 $(clean-dirs):
1494 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1495
1496 clean: rm-dirs := $(MODVERDIR)
1497 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1498
1499 PHONY += help
1500 help:
1501 @echo ' Building external modules.'
1502 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1503 @echo ''
1504 @echo ' modules - default target, build the module(s)'
1505 @echo ' modules_install - install the module'
1506 @echo ' clean - remove generated files in module directory only'
1507 @echo ''
1508
1509 # Dummies...
1510 PHONY += prepare scripts
1511 prepare: ;
1512 scripts: ;
1513 endif # KBUILD_EXTMOD
1514
1515 clean: $(clean-dirs)
1516 $(call cmd,rmdirs)
1517 $(call cmd,rmfiles)
1518 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1519 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1520 -o -name '*.ko.*' \
1521 -o -name '*.dwo' \
1522 -o -name '*.su' \
1523 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1524 -o -name '*.symtypes' -o -name 'modules.order' \
1525 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1526 -o -name '*.c.[012]*.*' \
1527 -o -name '*.gcno' \) -type f -print | xargs rm -f
1528
1529 # Generate tags for editors
1530 # ---------------------------------------------------------------------------
1531 quiet_cmd_tags = GEN $@
1532 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1533
1534 tags TAGS cscope gtags: FORCE
1535 $(call cmd,tags)
1536
1537 # Scripts to check various things for consistency
1538 # ---------------------------------------------------------------------------
1539
1540 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1541
1542 includecheck:
1543 find $(srctree)/* $(RCS_FIND_IGNORE) \
1544 -name '*.[hcS]' -type f -print | sort \
1545 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1546
1547 versioncheck:
1548 find $(srctree)/* $(RCS_FIND_IGNORE) \
1549 -name '*.[hcS]' -type f -print | sort \
1550 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1551
1552 coccicheck:
1553 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1554
1555 namespacecheck:
1556 $(PERL) $(srctree)/scripts/namespace.pl
1557
1558 export_report:
1559 $(PERL) $(srctree)/scripts/export_report.pl
1560
1561 endif #ifeq ($(config-targets),1)
1562 endif #ifeq ($(mixed-targets),1)
1563
1564 PHONY += checkstack kernelrelease kernelversion image_name
1565
1566 # UML needs a little special treatment here. It wants to use the host
1567 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1568 # else wants $(ARCH), including people doing cross-builds, which means
1569 # that $(SUBARCH) doesn't work here.
1570 ifeq ($(ARCH), um)
1571 CHECKSTACK_ARCH := $(SUBARCH)
1572 else
1573 CHECKSTACK_ARCH := $(ARCH)
1574 endif
1575 checkstack:
1576 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1577 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1578
1579 kernelrelease:
1580 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1581
1582 kernelversion:
1583 @echo $(KERNELVERSION)
1584
1585 image_name:
1586 @echo $(KBUILD_IMAGE)
1587
1588 # Clear a bunch of variables before executing the submake
1589 tools/: FORCE
1590 $(Q)mkdir -p $(objtree)/tools
1591 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
1592
1593 tools/%: FORCE
1594 $(Q)mkdir -p $(objtree)/tools
1595 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
1596
1597 # Single targets
1598 # ---------------------------------------------------------------------------
1599 # Single targets are compatible with:
1600 # - build with mixed source and output
1601 # - build with separate output dir 'make O=...'
1602 # - external modules
1603 #
1604 # target-dir => where to store outputfile
1605 # build-dir => directory in kernel source tree to use
1606
1607 ifeq ($(KBUILD_EXTMOD),)
1608 build-dir = $(patsubst %/,%,$(dir $@))
1609 target-dir = $(dir $@)
1610 else
1611 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1612 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1613 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1614 endif
1615
1616 %.s: %.c prepare scripts FORCE
1617 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1618 %.i: %.c prepare scripts FORCE
1619 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1620 %.o: %.c prepare scripts FORCE
1621 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1622 %.lst: %.c prepare scripts FORCE
1623 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1624 %.s: %.S prepare scripts FORCE
1625 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1626 %.o: %.S prepare scripts FORCE
1627 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1628 %.symtypes: %.c prepare scripts FORCE
1629 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1630
1631 # Modules
1632 /: prepare scripts FORCE
1633 $(cmd_crmodverdir)
1634 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1635 $(build)=$(build-dir)
1636 # Make sure the latest headers are built for Documentation
1637 Documentation/ samples/: headers_install
1638 %/: prepare scripts FORCE
1639 $(cmd_crmodverdir)
1640 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1641 $(build)=$(build-dir)
1642 %.ko: prepare scripts FORCE
1643 $(cmd_crmodverdir)
1644 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1645 $(build)=$(build-dir) $(@:.ko=.o)
1646 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1647
1648 # FIXME Should go into a make.lib or something
1649 # ===========================================================================
1650
1651 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1652 cmd_rmdirs = rm -rf $(rm-dirs)
1653
1654 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1655 cmd_rmfiles = rm -f $(rm-files)
1656
1657 # Run depmod only if we have System.map and depmod is executable
1658 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1659 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1660 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1661
1662 # Create temporary dir for module support files
1663 # clean it up only when building all modules
1664 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1665 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1666
1667 # read all saved command lines
1668
1669 targets := $(wildcard $(sort $(targets)))
1670 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1671
1672 ifneq ($(cmd_files),)
1673 $(cmd_files): ; # Do not try to update included dependency files
1674 include $(cmd_files)
1675 endif
1676
1677 endif # skip-makefile
1678
1679 PHONY += FORCE
1680 FORCE:
1681
1682 # Declare the contents of the .PHONY variable as phony. We keep that
1683 # information in a variable so we can use it in if_changed and friends.
1684 .PHONY: $(PHONY)