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mac80211: fix typo in starting baserate for rts_cts_rate_idx
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1 VERSION = 3
2 PATCHLEVEL = 17
3 SUBLEVEL = 0
4 EXTRAVERSION =
5 NAME = Shuffling Zombie Juror
6
7 # *DOCUMENTATION*
8 # To see a list of typical targets execute "make help"
9 # More info can be located in ./README
10 # Comments in this file are targeted only to the developer, do not
11 # expect to learn how to build the kernel reading this file.
12
13 # Do not:
14 # o use make's built-in rules and variables
15 # (this increases performance and avoids hard-to-debug behaviour);
16 # o print "Entering directory ...";
17 MAKEFLAGS += -rR --no-print-directory
18
19 # Avoid funny character set dependencies
20 unexport LC_ALL
21 LC_COLLATE=C
22 LC_NUMERIC=C
23 export LC_COLLATE LC_NUMERIC
24
25 # Avoid interference with shell env settings
26 unexport GREP_OPTIONS
27
28 # We are using a recursive build, so we need to do a little thinking
29 # to get the ordering right.
30 #
31 # Most importantly: sub-Makefiles should only ever modify files in
32 # their own directory. If in some directory we have a dependency on
33 # a file in another dir (which doesn't happen often, but it's often
34 # unavoidable when linking the built-in.o targets which finally
35 # turn into vmlinux), we will call a sub make in that other dir, and
36 # after that we are sure that everything which is in that other dir
37 # is now up to date.
38 #
39 # The only cases where we need to modify files which have global
40 # effects are thus separated out and done before the recursive
41 # descending is started. They are now explicitly listed as the
42 # prepare rule.
43
44 # Beautify output
45 # ---------------------------------------------------------------------------
46 #
47 # Normally, we echo the whole command before executing it. By making
48 # that echo $($(quiet)$(cmd)), we now have the possibility to set
49 # $(quiet) to choose other forms of output instead, e.g.
50 #
51 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
52 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
53 #
54 # If $(quiet) is empty, the whole command will be printed.
55 # If it is set to "quiet_", only the short version will be printed.
56 # If it is set to "silent_", nothing will be printed at all, since
57 # the variable $(silent_cmd_cc_o_c) doesn't exist.
58 #
59 # A simple variant is to prefix commands with $(Q) - that's useful
60 # for commands that shall be hidden in non-verbose mode.
61 #
62 # $(Q)ln $@ :<
63 #
64 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
65 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
66 #
67 # To put more focus on warnings, be less verbose as default
68 # Use 'make V=1' to see the full commands
69
70 ifeq ("$(origin V)", "command line")
71 KBUILD_VERBOSE = $(V)
72 endif
73 ifndef KBUILD_VERBOSE
74 KBUILD_VERBOSE = 0
75 endif
76
77 ifeq ($(KBUILD_VERBOSE),1)
78 quiet =
79 Q =
80 else
81 quiet=quiet_
82 Q = @
83 endif
84
85 # If the user is running make -s (silent mode), suppress echoing of
86 # commands
87
88 ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
89 ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
90 quiet=silent_
91 endif
92 else # make-3.8x
93 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
94 quiet=silent_
95 endif
96 endif
97
98 export quiet Q KBUILD_VERBOSE
99
100 # Call a source code checker (by default, "sparse") as part of the
101 # C compilation.
102 #
103 # Use 'make C=1' to enable checking of only re-compiled files.
104 # Use 'make C=2' to enable checking of *all* source files, regardless
105 # of whether they are re-compiled or not.
106 #
107 # See the file "Documentation/sparse.txt" for more details, including
108 # where to get the "sparse" utility.
109
110 ifeq ("$(origin C)", "command line")
111 KBUILD_CHECKSRC = $(C)
112 endif
113 ifndef KBUILD_CHECKSRC
114 KBUILD_CHECKSRC = 0
115 endif
116
117 # Use make M=dir to specify directory of external module to build
118 # Old syntax make ... SUBDIRS=$PWD is still supported
119 # Setting the environment variable KBUILD_EXTMOD take precedence
120 ifdef SUBDIRS
121 KBUILD_EXTMOD ?= $(SUBDIRS)
122 endif
123
124 ifeq ("$(origin M)", "command line")
125 KBUILD_EXTMOD := $(M)
126 endif
127
128 # kbuild supports saving output files in a separate directory.
129 # To locate output files in a separate directory two syntaxes are supported.
130 # In both cases the working directory must be the root of the kernel src.
131 # 1) O=
132 # Use "make O=dir/to/store/output/files/"
133 #
134 # 2) Set KBUILD_OUTPUT
135 # Set the environment variable KBUILD_OUTPUT to point to the directory
136 # where the output files shall be placed.
137 # export KBUILD_OUTPUT=dir/to/store/output/files/
138 # make
139 #
140 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
141 # variable.
142
143
144 # KBUILD_SRC is set on invocation of make in OBJ directory
145 # KBUILD_SRC is not intended to be used by the regular user (for now)
146 ifeq ($(KBUILD_SRC),)
147
148 # OK, Make called in directory where kernel src resides
149 # Do we want to locate output files in a separate directory?
150 ifeq ("$(origin O)", "command line")
151 KBUILD_OUTPUT := $(O)
152 endif
153
154 # That's our default target when none is given on the command line
155 PHONY := _all
156 _all:
157
158 # Cancel implicit rules on top Makefile
159 $(CURDIR)/Makefile Makefile: ;
160
161 ifneq ($(KBUILD_OUTPUT),)
162 # Invoke a second make in the output directory, passing relevant variables
163 # check that the output directory actually exists
164 saved-output := $(KBUILD_OUTPUT)
165 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
166 && /bin/pwd)
167 $(if $(KBUILD_OUTPUT),, \
168 $(error failed to create output directory "$(saved-output)"))
169
170 PHONY += $(MAKECMDGOALS) sub-make
171
172 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
173 @:
174
175 # Fake the "Entering directory" message once, so that IDEs/editors are
176 # able to understand relative filenames.
177 echodir := @echo
178 quiet_echodir := @echo
179 silent_echodir := @:
180 sub-make: FORCE
181 $($(quiet)echodir) "make[1]: Entering directory \`$(KBUILD_OUTPUT)'"
182 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
183 KBUILD_SRC=$(CURDIR) \
184 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
185 $(filter-out _all sub-make,$(MAKECMDGOALS))
186
187 # Leave processing to above invocation of make
188 skip-makefile := 1
189 endif # ifneq ($(KBUILD_OUTPUT),)
190 endif # ifeq ($(KBUILD_SRC),)
191
192 # We process the rest of the Makefile if this is the final invocation of make
193 ifeq ($(skip-makefile),)
194
195 # If building an external module we do not care about the all: rule
196 # but instead _all depend on modules
197 PHONY += all
198 ifeq ($(KBUILD_EXTMOD),)
199 _all: all
200 else
201 _all: modules
202 endif
203
204 ifeq ($(KBUILD_SRC),)
205 # building in the source tree
206 srctree := .
207 else
208 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
209 # building in a subdirectory of the source tree
210 srctree := ..
211 else
212 srctree := $(KBUILD_SRC)
213 endif
214 endif
215 objtree := .
216 src := $(srctree)
217 obj := $(objtree)
218
219 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
220
221 export srctree objtree VPATH
222
223
224 # SUBARCH tells the usermode build what the underlying arch is. That is set
225 # first, and if a usermode build is happening, the "ARCH=um" on the command
226 # line overrides the setting of ARCH below. If a native build is happening,
227 # then ARCH is assigned, getting whatever value it gets normally, and
228 # SUBARCH is subsequently ignored.
229
230 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
231 -e s/sun4u/sparc64/ \
232 -e s/arm.*/arm/ -e s/sa110/arm/ \
233 -e s/s390x/s390/ -e s/parisc64/parisc/ \
234 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
235 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
236
237 # Cross compiling and selecting different set of gcc/bin-utils
238 # ---------------------------------------------------------------------------
239 #
240 # When performing cross compilation for other architectures ARCH shall be set
241 # to the target architecture. (See arch/* for the possibilities).
242 # ARCH can be set during invocation of make:
243 # make ARCH=ia64
244 # Another way is to have ARCH set in the environment.
245 # The default ARCH is the host where make is executed.
246
247 # CROSS_COMPILE specify the prefix used for all executables used
248 # during compilation. Only gcc and related bin-utils executables
249 # are prefixed with $(CROSS_COMPILE).
250 # CROSS_COMPILE can be set on the command line
251 # make CROSS_COMPILE=ia64-linux-
252 # Alternatively CROSS_COMPILE can be set in the environment.
253 # A third alternative is to store a setting in .config so that plain
254 # "make" in the configured kernel build directory always uses that.
255 # Default value for CROSS_COMPILE is not to prefix executables
256 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
257 ARCH ?= $(SUBARCH)
258 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
259
260 # Architecture as present in compile.h
261 UTS_MACHINE := $(ARCH)
262 SRCARCH := $(ARCH)
263
264 # Additional ARCH settings for x86
265 ifeq ($(ARCH),i386)
266 SRCARCH := x86
267 endif
268 ifeq ($(ARCH),x86_64)
269 SRCARCH := x86
270 endif
271
272 # Additional ARCH settings for sparc
273 ifeq ($(ARCH),sparc32)
274 SRCARCH := sparc
275 endif
276 ifeq ($(ARCH),sparc64)
277 SRCARCH := sparc
278 endif
279
280 # Additional ARCH settings for sh
281 ifeq ($(ARCH),sh64)
282 SRCARCH := sh
283 endif
284
285 # Additional ARCH settings for tile
286 ifeq ($(ARCH),tilepro)
287 SRCARCH := tile
288 endif
289 ifeq ($(ARCH),tilegx)
290 SRCARCH := tile
291 endif
292
293 # Where to locate arch specific headers
294 hdr-arch := $(SRCARCH)
295
296 KCONFIG_CONFIG ?= .config
297 export KCONFIG_CONFIG
298
299 # SHELL used by kbuild
300 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
301 else if [ -x /bin/bash ]; then echo /bin/bash; \
302 else echo sh; fi ; fi)
303
304 HOSTCC = gcc
305 HOSTCXX = g++
306 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
307 HOSTCXXFLAGS = -O2
308
309 ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
310 HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
311 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
312 endif
313
314 # Decide whether to build built-in, modular, or both.
315 # Normally, just do built-in.
316
317 KBUILD_MODULES :=
318 KBUILD_BUILTIN := 1
319
320 # If we have only "make modules", don't compile built-in objects.
321 # When we're building modules with modversions, we need to consider
322 # the built-in objects during the descend as well, in order to
323 # make sure the checksums are up to date before we record them.
324
325 ifeq ($(MAKECMDGOALS),modules)
326 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
327 endif
328
329 # If we have "make <whatever> modules", compile modules
330 # in addition to whatever we do anyway.
331 # Just "make" or "make all" shall build modules as well
332
333 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
334 KBUILD_MODULES := 1
335 endif
336
337 ifeq ($(MAKECMDGOALS),)
338 KBUILD_MODULES := 1
339 endif
340
341 export KBUILD_MODULES KBUILD_BUILTIN
342 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
343
344 ifneq ($(CC),)
345 ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
346 COMPILER := clang
347 else
348 COMPILER := gcc
349 endif
350 export COMPILER
351 endif
352
353 # Look for make include files relative to root of kernel src
354 MAKEFLAGS += --include-dir=$(srctree)
355
356 # We need some generic definitions (do not try to remake the file).
357 $(srctree)/scripts/Kbuild.include: ;
358 include $(srctree)/scripts/Kbuild.include
359
360 # Make variables (CC, etc...)
361 AS = $(CROSS_COMPILE)as
362 LD = $(CROSS_COMPILE)ld
363 CC = $(CROSS_COMPILE)gcc
364 CPP = $(CC) -E
365 AR = $(CROSS_COMPILE)ar
366 NM = $(CROSS_COMPILE)nm
367 STRIP = $(CROSS_COMPILE)strip
368 OBJCOPY = $(CROSS_COMPILE)objcopy
369 OBJDUMP = $(CROSS_COMPILE)objdump
370 AWK = awk
371 GENKSYMS = scripts/genksyms/genksyms
372 INSTALLKERNEL := installkernel
373 DEPMOD = /sbin/depmod
374 PERL = perl
375 PYTHON = python
376 CHECK = sparse
377
378 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
379 -Wbitwise -Wno-return-void $(CF)
380 CFLAGS_MODULE =
381 AFLAGS_MODULE =
382 LDFLAGS_MODULE =
383 CFLAGS_KERNEL =
384 AFLAGS_KERNEL =
385 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
386
387
388 # Use USERINCLUDE when you must reference the UAPI directories only.
389 USERINCLUDE := \
390 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
391 -Iarch/$(hdr-arch)/include/generated/uapi \
392 -I$(srctree)/include/uapi \
393 -Iinclude/generated/uapi \
394 -include $(srctree)/include/linux/kconfig.h
395
396 # Use LINUXINCLUDE when you must reference the include/ directory.
397 # Needed to be compatible with the O= option
398 LINUXINCLUDE := \
399 -I$(srctree)/arch/$(hdr-arch)/include \
400 -Iarch/$(hdr-arch)/include/generated \
401 $(if $(KBUILD_SRC), -I$(srctree)/include) \
402 -Iinclude \
403 $(USERINCLUDE)
404
405 KBUILD_CPPFLAGS := -D__KERNEL__
406
407 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
408 -fno-strict-aliasing -fno-common \
409 -Werror-implicit-function-declaration \
410 -Wno-format-security
411
412 KBUILD_AFLAGS_KERNEL :=
413 KBUILD_CFLAGS_KERNEL :=
414 KBUILD_AFLAGS := -D__ASSEMBLY__
415 KBUILD_AFLAGS_MODULE := -DMODULE
416 KBUILD_CFLAGS_MODULE := -DMODULE
417 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
418
419 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
420 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
421 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
422
423 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
424 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
425 export CPP AR NM STRIP OBJCOPY OBJDUMP
426 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
427 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
428
429 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
430 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
431 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
432 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
433 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
434 export KBUILD_ARFLAGS
435
436 # When compiling out-of-tree modules, put MODVERDIR in the module
437 # tree rather than in the kernel tree. The kernel tree might
438 # even be read-only.
439 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
440
441 # Files to ignore in find ... statements
442
443 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
444 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
445 -prune -o
446 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
447 --exclude CVS --exclude .pc --exclude .hg --exclude .git
448
449 # ===========================================================================
450 # Rules shared between *config targets and build targets
451
452 # Basic helpers built in scripts/
453 PHONY += scripts_basic
454 scripts_basic:
455 $(Q)$(MAKE) $(build)=scripts/basic
456 $(Q)rm -f .tmp_quiet_recordmcount
457
458 # To avoid any implicit rule to kick in, define an empty command.
459 scripts/basic/%: scripts_basic ;
460
461 PHONY += outputmakefile
462 # outputmakefile generates a Makefile in the output directory, if using a
463 # separate output directory. This allows convenient use of make in the
464 # output directory.
465 outputmakefile:
466 ifneq ($(KBUILD_SRC),)
467 $(Q)ln -fsn $(srctree) source
468 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
469 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
470 endif
471
472 # Support for using generic headers in asm-generic
473 PHONY += asm-generic
474 asm-generic:
475 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
476 src=asm obj=arch/$(SRCARCH)/include/generated/asm
477 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
478 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
479
480 # To make sure we do not include .config for any of the *config targets
481 # catch them early, and hand them over to scripts/kconfig/Makefile
482 # It is allowed to specify more targets when calling make, including
483 # mixing *config targets and build targets.
484 # For example 'make oldconfig all'.
485 # Detect when mixed targets is specified, and make a second invocation
486 # of make so .config is not included in this case either (for *config).
487
488 version_h := include/generated/uapi/linux/version.h
489
490 no-dot-config-targets := clean mrproper distclean \
491 cscope gtags TAGS tags help %docs check% coccicheck \
492 $(version_h) headers_% archheaders archscripts \
493 kernelversion %src-pkg
494
495 config-targets := 0
496 mixed-targets := 0
497 dot-config := 1
498
499 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
500 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
501 dot-config := 0
502 endif
503 endif
504
505 ifeq ($(KBUILD_EXTMOD),)
506 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
507 config-targets := 1
508 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
509 mixed-targets := 1
510 endif
511 endif
512 endif
513
514 ifeq ($(mixed-targets),1)
515 # ===========================================================================
516 # We're called with mixed targets (*config and build targets).
517 # Handle them one by one.
518
519 PHONY += $(MAKECMDGOALS) __build_one_by_one
520
521 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
522 @:
523
524 __build_one_by_one:
525 $(Q)set -e; \
526 for i in $(MAKECMDGOALS); do \
527 $(MAKE) -f $(srctree)/Makefile $$i; \
528 done
529
530 else
531 ifeq ($(config-targets),1)
532 # ===========================================================================
533 # *config targets only - make sure prerequisites are updated, and descend
534 # in scripts/kconfig to make the *config target
535
536 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
537 # KBUILD_DEFCONFIG may point out an alternative default configuration
538 # used for 'make defconfig'
539 include $(srctree)/arch/$(SRCARCH)/Makefile
540 export KBUILD_DEFCONFIG KBUILD_KCONFIG
541
542 config: scripts_basic outputmakefile FORCE
543 $(Q)$(MAKE) $(build)=scripts/kconfig $@
544
545 %config: scripts_basic outputmakefile FORCE
546 $(Q)$(MAKE) $(build)=scripts/kconfig $@
547
548 else
549 # ===========================================================================
550 # Build targets only - this includes vmlinux, arch specific targets, clean
551 # targets and others. In general all targets except *config targets.
552
553 ifeq ($(KBUILD_EXTMOD),)
554 # Additional helpers built in scripts/
555 # Carefully list dependencies so we do not try to build scripts twice
556 # in parallel
557 PHONY += scripts
558 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
559 asm-generic
560 $(Q)$(MAKE) $(build)=$(@)
561
562 # Objects we will link into vmlinux / subdirs we need to visit
563 init-y := init/
564 drivers-y := drivers/ sound/ firmware/
565 net-y := net/
566 libs-y := lib/
567 core-y := usr/
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 include $(srctree)/arch/$(SRCARCH)/Makefile
616
617 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
618
619 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
620 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
621 else
622 KBUILD_CFLAGS += -O2
623 endif
624
625 # Tell gcc to never replace conditional load with a non-conditional one
626 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
627
628 ifdef CONFIG_READABLE_ASM
629 # Disable optimizations that make assembler listings hard to read.
630 # reorder blocks reorders the control in the function
631 # ipa clone creates specialized cloned functions
632 # partial inlining inlines only parts of functions
633 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
634 $(call cc-option,-fno-ipa-cp-clone,) \
635 $(call cc-option,-fno-partial-inlining)
636 endif
637
638 ifneq ($(CONFIG_FRAME_WARN),0)
639 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
640 endif
641
642 # Handle stack protector mode.
643 #
644 # Since kbuild can potentially perform two passes (first with the old
645 # .config values and then with updated .config values), we cannot error out
646 # if a desired compiler option is unsupported. If we were to error, kbuild
647 # could never get to the second pass and actually notice that we changed
648 # the option to something that was supported.
649 #
650 # Additionally, we don't want to fallback and/or silently change which compiler
651 # flags will be used, since that leads to producing kernels with different
652 # security feature characteristics depending on the compiler used. ("But I
653 # selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
654 #
655 # The middle ground is to warn here so that the failed option is obvious, but
656 # to let the build fail with bad compiler flags so that we can't produce a
657 # kernel when there is a CONFIG and compiler mismatch.
658 #
659 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
660 stackp-flag := -fstack-protector
661 ifeq ($(call cc-option, $(stackp-flag)),)
662 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
663 -fstack-protector not supported by compiler)
664 endif
665 else
666 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
667 stackp-flag := -fstack-protector-strong
668 ifeq ($(call cc-option, $(stackp-flag)),)
669 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
670 -fstack-protector-strong not supported by compiler)
671 endif
672 else
673 # Force off for distro compilers that enable stack protector by default.
674 stackp-flag := $(call cc-option, -fno-stack-protector)
675 endif
676 endif
677 KBUILD_CFLAGS += $(stackp-flag)
678
679 ifeq ($(COMPILER),clang)
680 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
681 KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
682 KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
683 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
684 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
685 # Quiet clang warning: comparison of unsigned expression < 0 is always false
686 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
687 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
688 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
689 # See modpost pattern 2
690 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
691 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
692 else
693
694 # This warning generated too much noise in a regular build.
695 # Use make W=1 to enable this warning (see scripts/Makefile.build)
696 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
697 endif
698
699 ifdef CONFIG_FRAME_POINTER
700 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
701 else
702 # Some targets (ARM with Thumb2, for example), can't be built with frame
703 # pointers. For those, we don't have FUNCTION_TRACER automatically
704 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
705 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
706 # -fomit-frame-pointer with FUNCTION_TRACER.
707 ifndef CONFIG_FUNCTION_TRACER
708 KBUILD_CFLAGS += -fomit-frame-pointer
709 endif
710 endif
711
712 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
713
714 ifdef CONFIG_DEBUG_INFO
715 ifdef CONFIG_DEBUG_INFO_SPLIT
716 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
717 else
718 KBUILD_CFLAGS += -g
719 endif
720 KBUILD_AFLAGS += -Wa,-gdwarf-2
721 endif
722 ifdef CONFIG_DEBUG_INFO_DWARF4
723 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
724 endif
725
726 ifdef CONFIG_DEBUG_INFO_REDUCED
727 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
728 $(call cc-option,-fno-var-tracking)
729 endif
730
731 ifdef CONFIG_FUNCTION_TRACER
732 ifdef CONFIG_HAVE_FENTRY
733 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
734 endif
735 KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
736 KBUILD_AFLAGS += $(CC_USING_FENTRY)
737 ifdef CONFIG_DYNAMIC_FTRACE
738 ifdef CONFIG_HAVE_C_RECORDMCOUNT
739 BUILD_C_RECORDMCOUNT := y
740 export BUILD_C_RECORDMCOUNT
741 endif
742 endif
743 endif
744
745 # We trigger additional mismatches with less inlining
746 ifdef CONFIG_DEBUG_SECTION_MISMATCH
747 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
748 endif
749
750 # arch Makefile may override CC so keep this after arch Makefile is included
751 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
752 CHECKFLAGS += $(NOSTDINC_FLAGS)
753
754 # warn about C99 declaration after statement
755 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
756
757 # disable pointer signed / unsigned warnings in gcc 4.0
758 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
759
760 # disable invalid "can't wrap" optimizations for signed / pointers
761 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
762
763 # conserve stack if available
764 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
765
766 # disallow errors like 'EXPORT_GPL(foo);' with missing header
767 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
768
769 # require functions to have arguments in prototypes, not empty 'int foo()'
770 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
771
772 # Prohibit date/time macros, which would make the build non-deterministic
773 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
774
775 # use the deterministic mode of AR if available
776 KBUILD_ARFLAGS := $(call ar-option,D)
777
778 # check for 'asm goto'
779 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
780 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
781 endif
782
783 include $(srctree)/scripts/Makefile.extrawarn
784
785 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
786 KBUILD_CPPFLAGS += $(KCPPFLAGS)
787 KBUILD_AFLAGS += $(KAFLAGS)
788 KBUILD_CFLAGS += $(KCFLAGS)
789
790 # Use --build-id when available.
791 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
792 $(call cc-ldoption, -Wl$(comma)--build-id,))
793 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
794 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
795
796 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
797 LDFLAGS_vmlinux += $(call ld-option, -X,)
798 endif
799
800 # Default kernel image to build when no specific target is given.
801 # KBUILD_IMAGE may be overruled on the command line or
802 # set in the environment
803 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
804 # this default value
805 export KBUILD_IMAGE ?= vmlinux
806
807 #
808 # INSTALL_PATH specifies where to place the updated kernel and system map
809 # images. Default is /boot, but you can set it to other values
810 export INSTALL_PATH ?= /boot
811
812 #
813 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
814 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
815 # an argument if needed. Otherwise it defaults to the kernel install path
816 #
817 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
818
819 #
820 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
821 # relocations required by build roots. This is not defined in the
822 # makefile but the argument can be passed to make if needed.
823 #
824
825 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
826 export MODLIB
827
828 #
829 # INSTALL_MOD_STRIP, if defined, will cause modules to be
830 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
831 # the default option --strip-debug will be used. Otherwise,
832 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
833
834 ifdef INSTALL_MOD_STRIP
835 ifeq ($(INSTALL_MOD_STRIP),1)
836 mod_strip_cmd = $(STRIP) --strip-debug
837 else
838 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
839 endif # INSTALL_MOD_STRIP=1
840 else
841 mod_strip_cmd = true
842 endif # INSTALL_MOD_STRIP
843 export mod_strip_cmd
844
845 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
846 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
847 # or CONFIG_MODULE_COMPRESS_XZ.
848
849 mod_compress_cmd = true
850 ifdef CONFIG_MODULE_COMPRESS
851 ifdef CONFIG_MODULE_COMPRESS_GZIP
852 mod_compress_cmd = gzip -n
853 endif # CONFIG_MODULE_COMPRESS_GZIP
854 ifdef CONFIG_MODULE_COMPRESS_XZ
855 mod_compress_cmd = xz
856 endif # CONFIG_MODULE_COMPRESS_XZ
857 endif # CONFIG_MODULE_COMPRESS
858 export mod_compress_cmd
859
860 # Select initial ramdisk compression format, default is gzip(1).
861 # This shall be used by the dracut(8) tool while creating an initramfs image.
862 #
863 INITRD_COMPRESS-y := gzip
864 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
865 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
866 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
867 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
868 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
869 # do not export INITRD_COMPRESS, since we didn't actually
870 # choose a sane default compression above.
871 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
872
873 ifdef CONFIG_MODULE_SIG_ALL
874 MODSECKEY = ./signing_key.priv
875 MODPUBKEY = ./signing_key.x509
876 export MODPUBKEY
877 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
878 else
879 mod_sign_cmd = true
880 endif
881 export mod_sign_cmd
882
883
884 ifeq ($(KBUILD_EXTMOD),)
885 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
886
887 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
888 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
889 $(net-y) $(net-m) $(libs-y) $(libs-m)))
890
891 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
892 $(init-n) $(init-) \
893 $(core-n) $(core-) $(drivers-n) $(drivers-) \
894 $(net-n) $(net-) $(libs-n) $(libs-))))
895
896 init-y := $(patsubst %/, %/built-in.o, $(init-y))
897 core-y := $(patsubst %/, %/built-in.o, $(core-y))
898 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
899 net-y := $(patsubst %/, %/built-in.o, $(net-y))
900 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
901 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
902 libs-y := $(libs-y1) $(libs-y2)
903
904 # Externally visible symbols (used by link-vmlinux.sh)
905 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
906 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
907 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
908 export LDFLAGS_vmlinux
909 # used by scripts/pacmage/Makefile
910 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
911
912 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
913
914 # Final link of vmlinux
915 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
916 quiet_cmd_link-vmlinux = LINK $@
917
918 # Include targets which we want to
919 # execute if the rest of the kernel build went well.
920 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
921 ifdef CONFIG_HEADERS_CHECK
922 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
923 endif
924 ifdef CONFIG_SAMPLES
925 $(Q)$(MAKE) $(build)=samples
926 endif
927 ifdef CONFIG_BUILD_DOCSRC
928 $(Q)$(MAKE) $(build)=Documentation
929 endif
930 +$(call if_changed,link-vmlinux)
931
932 # The actual objects are generated when descending,
933 # make sure no implicit rule kicks in
934 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
935
936 # Handle descending into subdirectories listed in $(vmlinux-dirs)
937 # Preset locale variables to speed up the build process. Limit locale
938 # tweaks to this spot to avoid wrong language settings when running
939 # make menuconfig etc.
940 # Error messages still appears in the original language
941
942 PHONY += $(vmlinux-dirs)
943 $(vmlinux-dirs): prepare scripts
944 $(Q)$(MAKE) $(build)=$@
945
946 define filechk_kernel.release
947 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
948 endef
949
950 # Store (new) KERNELRELEASE string in include/config/kernel.release
951 include/config/kernel.release: include/config/auto.conf FORCE
952 $(call filechk,kernel.release)
953
954
955 # Things we need to do before we recursively start building the kernel
956 # or the modules are listed in "prepare".
957 # A multi level approach is used. prepareN is processed before prepareN-1.
958 # archprepare is used in arch Makefiles and when processed asm symlink,
959 # version.h and scripts_basic is processed / created.
960
961 # Listed in dependency order
962 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
963
964 # prepare3 is used to check if we are building in a separate output directory,
965 # and if so do:
966 # 1) Check that make has not been executed in the kernel src $(srctree)
967 prepare3: include/config/kernel.release
968 ifneq ($(KBUILD_SRC),)
969 @$(kecho) ' Using $(srctree) as source for kernel'
970 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
971 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
972 echo >&2 " in the '$(srctree)' directory.";\
973 /bin/false; \
974 fi;
975 endif
976
977 # prepare2 creates a makefile if using a separate output directory
978 prepare2: prepare3 outputmakefile asm-generic
979
980 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
981 include/config/auto.conf
982 $(cmd_crmodverdir)
983
984 archprepare: archheaders archscripts prepare1 scripts_basic
985
986 prepare0: archprepare FORCE
987 $(Q)$(MAKE) $(build)=.
988
989 # All the preparing..
990 prepare: prepare0
991
992 # Generate some files
993 # ---------------------------------------------------------------------------
994
995 # KERNELRELEASE can change from a few different places, meaning version.h
996 # needs to be updated, so this check is forced on all builds
997
998 uts_len := 64
999 define filechk_utsrelease.h
1000 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1001 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1002 exit 1; \
1003 fi; \
1004 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1005 endef
1006
1007 define filechk_version.h
1008 (echo \#define LINUX_VERSION_CODE $(shell \
1009 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1010 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1011 endef
1012
1013 $(version_h): $(srctree)/Makefile FORCE
1014 $(call filechk,version.h)
1015
1016 include/generated/utsrelease.h: include/config/kernel.release FORCE
1017 $(call filechk,utsrelease.h)
1018
1019 PHONY += headerdep
1020 headerdep:
1021 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1022 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1023
1024 # ---------------------------------------------------------------------------
1025
1026 PHONY += depend dep
1027 depend dep:
1028 @echo '*** Warning: make $@ is unnecessary now.'
1029
1030 # ---------------------------------------------------------------------------
1031 # Firmware install
1032 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1033 export INSTALL_FW_PATH
1034
1035 PHONY += firmware_install
1036 firmware_install: FORCE
1037 @mkdir -p $(objtree)/firmware
1038 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1039
1040 # ---------------------------------------------------------------------------
1041 # Kernel headers
1042
1043 #Default location for installed headers
1044 export INSTALL_HDR_PATH = $(objtree)/usr
1045
1046 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1047
1048 # If we do an all arch process set dst to asm-$(hdr-arch)
1049 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1050
1051 PHONY += archheaders
1052 archheaders:
1053
1054 PHONY += archscripts
1055 archscripts:
1056
1057 PHONY += __headers
1058 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
1059 $(Q)$(MAKE) $(build)=scripts build_unifdef
1060
1061 PHONY += headers_install_all
1062 headers_install_all:
1063 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1064
1065 PHONY += headers_install
1066 headers_install: __headers
1067 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1068 $(error Headers not exportable for the $(SRCARCH) architecture))
1069 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1070 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
1071
1072 PHONY += headers_check_all
1073 headers_check_all: headers_install_all
1074 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1075
1076 PHONY += headers_check
1077 headers_check: headers_install
1078 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1079 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
1080
1081 # ---------------------------------------------------------------------------
1082 # Kernel selftest
1083
1084 PHONY += kselftest
1085 kselftest:
1086 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1087
1088 # ---------------------------------------------------------------------------
1089 # Modules
1090
1091 ifdef CONFIG_MODULES
1092
1093 # By default, build modules as well
1094
1095 all: modules
1096
1097 # Build modules
1098 #
1099 # A module can be listed more than once in obj-m resulting in
1100 # duplicate lines in modules.order files. Those are removed
1101 # using awk while concatenating to the final file.
1102
1103 PHONY += modules
1104 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1105 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1106 @$(kecho) ' Building modules, stage 2.';
1107 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1108 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1109
1110 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1111 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1112
1113 %/modules.builtin: include/config/auto.conf
1114 $(Q)$(MAKE) $(modbuiltin)=$*
1115
1116
1117 # Target to prepare building external modules
1118 PHONY += modules_prepare
1119 modules_prepare: prepare scripts
1120
1121 # Target to install modules
1122 PHONY += modules_install
1123 modules_install: _modinst_ _modinst_post
1124
1125 PHONY += _modinst_
1126 _modinst_:
1127 @rm -rf $(MODLIB)/kernel
1128 @rm -f $(MODLIB)/source
1129 @mkdir -p $(MODLIB)/kernel
1130 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1131 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1132 rm -f $(MODLIB)/build ; \
1133 ln -s $(CURDIR) $(MODLIB)/build ; \
1134 fi
1135 @cp -f $(objtree)/modules.order $(MODLIB)/
1136 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1137 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1138
1139 # This depmod is only for convenience to give the initial
1140 # boot a modules.dep even before / is mounted read-write. However the
1141 # boot script depmod is the master version.
1142 PHONY += _modinst_post
1143 _modinst_post: _modinst_
1144 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1145 $(call cmd,depmod)
1146
1147 ifeq ($(CONFIG_MODULE_SIG), y)
1148 PHONY += modules_sign
1149 modules_sign:
1150 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1151 endif
1152
1153 else # CONFIG_MODULES
1154
1155 # Modules not configured
1156 # ---------------------------------------------------------------------------
1157
1158 modules modules_install: FORCE
1159 @echo >&2
1160 @echo >&2 "The present kernel configuration has modules disabled."
1161 @echo >&2 "Type 'make config' and enable loadable module support."
1162 @echo >&2 "Then build a kernel with module support enabled."
1163 @echo >&2
1164 @exit 1
1165
1166 endif # CONFIG_MODULES
1167
1168 ###
1169 # Cleaning is done on three levels.
1170 # make clean Delete most generated files
1171 # Leave enough to build external modules
1172 # make mrproper Delete the current configuration, and all generated files
1173 # make distclean Remove editor backup files, patch leftover files and the like
1174
1175 # Directories & files removed with 'make clean'
1176 CLEAN_DIRS += $(MODVERDIR)
1177
1178 # Directories & files removed with 'make mrproper'
1179 MRPROPER_DIRS += include/config usr/include include/generated \
1180 arch/*/include/generated .tmp_objdiff
1181 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1182 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1183 signing_key.priv signing_key.x509 x509.genkey \
1184 extra_certificates signing_key.x509.keyid \
1185 signing_key.x509.signer include/linux/version.h
1186
1187 # clean - Delete most, but leave enough to build external modules
1188 #
1189 clean: rm-dirs := $(CLEAN_DIRS)
1190 clean: rm-files := $(CLEAN_FILES)
1191 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1192
1193 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1194 $(clean-dirs):
1195 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1196
1197 vmlinuxclean:
1198 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1199
1200 clean: archclean vmlinuxclean
1201
1202 # mrproper - Delete all generated files, including .config
1203 #
1204 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1205 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1206 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1207
1208 PHONY += $(mrproper-dirs) mrproper archmrproper
1209 $(mrproper-dirs):
1210 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1211
1212 mrproper: clean archmrproper $(mrproper-dirs)
1213 $(call cmd,rmdirs)
1214 $(call cmd,rmfiles)
1215
1216 # distclean
1217 #
1218 PHONY += distclean
1219
1220 distclean: mrproper
1221 @find $(srctree) $(RCS_FIND_IGNORE) \
1222 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1223 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1224 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1225 -type f -print | xargs rm -f
1226
1227
1228 # Packaging of the kernel to various formats
1229 # ---------------------------------------------------------------------------
1230 # rpm target kept for backward compatibility
1231 package-dir := scripts/package
1232
1233 %src-pkg: FORCE
1234 $(Q)$(MAKE) $(build)=$(package-dir) $@
1235 %pkg: include/config/kernel.release FORCE
1236 $(Q)$(MAKE) $(build)=$(package-dir) $@
1237 rpm: include/config/kernel.release FORCE
1238 $(Q)$(MAKE) $(build)=$(package-dir) $@
1239
1240
1241 # Brief documentation of the typical targets used
1242 # ---------------------------------------------------------------------------
1243
1244 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1245 boards := $(notdir $(boards))
1246 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1247 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1248
1249 help:
1250 @echo 'Cleaning targets:'
1251 @echo ' clean - Remove most generated files but keep the config and'
1252 @echo ' enough build support to build external modules'
1253 @echo ' mrproper - Remove all generated files + config + various backup files'
1254 @echo ' distclean - mrproper + remove editor backup and patch files'
1255 @echo ''
1256 @echo 'Configuration targets:'
1257 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1258 @echo ''
1259 @echo 'Other generic targets:'
1260 @echo ' all - Build all targets marked with [*]'
1261 @echo '* vmlinux - Build the bare kernel'
1262 @echo '* modules - Build all modules'
1263 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1264 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1265 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1266 @echo ' dir/ - Build all files in dir and below'
1267 @echo ' dir/file.[oisS] - Build specified target only'
1268 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1269 @echo ' (requires a recent binutils and recent build (System.map))'
1270 @echo ' dir/file.ko - Build module including final link'
1271 @echo ' modules_prepare - Set up for building external modules'
1272 @echo ' tags/TAGS - Generate tags file for editors'
1273 @echo ' cscope - Generate cscope index'
1274 @echo ' gtags - Generate GNU GLOBAL index'
1275 @echo ' kernelrelease - Output the release version string (use with make -s)'
1276 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1277 @echo ' image_name - Output the image name (use with make -s)'
1278 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1279 echo ' (default: $(INSTALL_HDR_PATH))'; \
1280 echo ''
1281 @echo 'Static analysers'
1282 @echo ' checkstack - Generate a list of stack hogs'
1283 @echo ' namespacecheck - Name space analysis on compiled kernel'
1284 @echo ' versioncheck - Sanity check on version.h usage'
1285 @echo ' includecheck - Check for duplicate included header files'
1286 @echo ' export_report - List the usages of all exported symbols'
1287 @echo ' headers_check - Sanity check on exported headers'
1288 @echo ' headerdep - Detect inclusion cycles in headers'
1289 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1290 @echo ''
1291 @echo 'Kernel selftest'
1292 @echo ' kselftest - Build and run kernel selftest (run as root)'
1293 @echo ' Build, install, and boot kernel before'
1294 @echo ' running kselftest on it'
1295 @echo ''
1296 @echo 'Kernel packaging:'
1297 @$(MAKE) $(build)=$(package-dir) help
1298 @echo ''
1299 @echo 'Documentation targets:'
1300 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1301 @echo ''
1302 @echo 'Architecture specific targets ($(SRCARCH)):'
1303 @$(if $(archhelp),$(archhelp),\
1304 echo ' No architecture specific help defined for $(SRCARCH)')
1305 @echo ''
1306 @$(if $(boards), \
1307 $(foreach b, $(boards), \
1308 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1309 echo '')
1310 @$(if $(board-dirs), \
1311 $(foreach b, $(board-dirs), \
1312 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1313 printf " %-16s - Show all of the above\\n" help-boards; \
1314 echo '')
1315
1316 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1317 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1318 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1319 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1320 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1321 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1322 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1323 @echo ' 1: warnings which may be relevant and do not occur too often'
1324 @echo ' 2: warnings which occur quite often but may still be relevant'
1325 @echo ' 3: more obscure warnings, can most likely be ignored'
1326 @echo ' Multiple levels can be combined with W=12 or W=123'
1327 @echo ''
1328 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1329 @echo 'For further info see the ./README file'
1330
1331
1332 help-board-dirs := $(addprefix help-,$(board-dirs))
1333
1334 help-boards: $(help-board-dirs)
1335
1336 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1337
1338 $(help-board-dirs): help-%:
1339 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1340 @$(if $(boards-per-dir), \
1341 $(foreach b, $(boards-per-dir), \
1342 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1343 echo '')
1344
1345
1346 # Documentation targets
1347 # ---------------------------------------------------------------------------
1348 %docs: scripts_basic FORCE
1349 $(Q)$(MAKE) $(build)=scripts build_docproc
1350 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1351
1352 else # KBUILD_EXTMOD
1353
1354 ###
1355 # External module support.
1356 # When building external modules the kernel used as basis is considered
1357 # read-only, and no consistency checks are made and the make
1358 # system is not used on the basis kernel. If updates are required
1359 # in the basis kernel ordinary make commands (without M=...) must
1360 # be used.
1361 #
1362 # The following are the only valid targets when building external
1363 # modules.
1364 # make M=dir clean Delete all automatically generated files
1365 # make M=dir modules Make all modules in specified dir
1366 # make M=dir Same as 'make M=dir modules'
1367 # make M=dir modules_install
1368 # Install the modules built in the module directory
1369 # Assumes install directory is already created
1370
1371 # We are always building modules
1372 KBUILD_MODULES := 1
1373 PHONY += crmodverdir
1374 crmodverdir:
1375 $(cmd_crmodverdir)
1376
1377 PHONY += $(objtree)/Module.symvers
1378 $(objtree)/Module.symvers:
1379 @test -e $(objtree)/Module.symvers || ( \
1380 echo; \
1381 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1382 echo " is missing; modules will have no dependencies and modversions."; \
1383 echo )
1384
1385 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1386 PHONY += $(module-dirs) modules
1387 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1388 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1389
1390 modules: $(module-dirs)
1391 @$(kecho) ' Building modules, stage 2.';
1392 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1393
1394 PHONY += modules_install
1395 modules_install: _emodinst_ _emodinst_post
1396
1397 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1398 PHONY += _emodinst_
1399 _emodinst_:
1400 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1401 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1402
1403 PHONY += _emodinst_post
1404 _emodinst_post: _emodinst_
1405 $(call cmd,depmod)
1406
1407 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1408
1409 PHONY += $(clean-dirs) clean
1410 $(clean-dirs):
1411 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1412
1413 clean: rm-dirs := $(MODVERDIR)
1414 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1415
1416 help:
1417 @echo ' Building external modules.'
1418 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1419 @echo ''
1420 @echo ' modules - default target, build the module(s)'
1421 @echo ' modules_install - install the module'
1422 @echo ' clean - remove generated files in module directory only'
1423 @echo ''
1424
1425 # Dummies...
1426 PHONY += prepare scripts
1427 prepare: ;
1428 scripts: ;
1429 endif # KBUILD_EXTMOD
1430
1431 clean: $(clean-dirs)
1432 $(call cmd,rmdirs)
1433 $(call cmd,rmfiles)
1434 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1435 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1436 -o -name '*.ko.*' \
1437 -o -name '*.dwo' \
1438 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1439 -o -name '*.symtypes' -o -name 'modules.order' \
1440 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1441 -o -name '*.gcno' \) -type f -print | xargs rm -f
1442
1443 # Generate tags for editors
1444 # ---------------------------------------------------------------------------
1445 quiet_cmd_tags = GEN $@
1446 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1447
1448 tags TAGS cscope gtags: FORCE
1449 $(call cmd,tags)
1450
1451 # Scripts to check various things for consistency
1452 # ---------------------------------------------------------------------------
1453
1454 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1455
1456 includecheck:
1457 find $(srctree)/* $(RCS_FIND_IGNORE) \
1458 -name '*.[hcS]' -type f -print | sort \
1459 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1460
1461 versioncheck:
1462 find $(srctree)/* $(RCS_FIND_IGNORE) \
1463 -name '*.[hcS]' -type f -print | sort \
1464 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1465
1466 coccicheck:
1467 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1468
1469 namespacecheck:
1470 $(PERL) $(srctree)/scripts/namespace.pl
1471
1472 export_report:
1473 $(PERL) $(srctree)/scripts/export_report.pl
1474
1475 endif #ifeq ($(config-targets),1)
1476 endif #ifeq ($(mixed-targets),1)
1477
1478 PHONY += checkstack kernelrelease kernelversion image_name
1479
1480 # UML needs a little special treatment here. It wants to use the host
1481 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1482 # else wants $(ARCH), including people doing cross-builds, which means
1483 # that $(SUBARCH) doesn't work here.
1484 ifeq ($(ARCH), um)
1485 CHECKSTACK_ARCH := $(SUBARCH)
1486 else
1487 CHECKSTACK_ARCH := $(ARCH)
1488 endif
1489 checkstack:
1490 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1491 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1492
1493 kernelrelease:
1494 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1495
1496 kernelversion:
1497 @echo $(KERNELVERSION)
1498
1499 image_name:
1500 @echo $(KBUILD_IMAGE)
1501
1502 # Clear a bunch of variables before executing the submake
1503 tools/: FORCE
1504 $(Q)mkdir -p $(objtree)/tools
1505 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1506
1507 tools/%: FORCE
1508 $(Q)mkdir -p $(objtree)/tools
1509 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1510
1511 # Single targets
1512 # ---------------------------------------------------------------------------
1513 # Single targets are compatible with:
1514 # - build with mixed source and output
1515 # - build with separate output dir 'make O=...'
1516 # - external modules
1517 #
1518 # target-dir => where to store outputfile
1519 # build-dir => directory in kernel source tree to use
1520
1521 ifeq ($(KBUILD_EXTMOD),)
1522 build-dir = $(patsubst %/,%,$(dir $@))
1523 target-dir = $(dir $@)
1524 else
1525 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1526 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1527 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1528 endif
1529
1530 %.s: %.c prepare scripts FORCE
1531 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1532 %.i: %.c prepare scripts FORCE
1533 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1534 %.o: %.c prepare scripts FORCE
1535 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1536 %.lst: %.c prepare scripts FORCE
1537 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1538 %.s: %.S prepare scripts FORCE
1539 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1540 %.o: %.S prepare scripts FORCE
1541 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1542 %.symtypes: %.c prepare scripts FORCE
1543 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1544
1545 # Modules
1546 /: prepare scripts FORCE
1547 $(cmd_crmodverdir)
1548 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1549 $(build)=$(build-dir)
1550 # Make sure the latest headers are built for Documentation
1551 Documentation/: headers_install
1552 %/: prepare scripts FORCE
1553 $(cmd_crmodverdir)
1554 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1555 $(build)=$(build-dir)
1556 %.ko: prepare scripts FORCE
1557 $(cmd_crmodverdir)
1558 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1559 $(build)=$(build-dir) $(@:.ko=.o)
1560 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1561
1562 # FIXME Should go into a make.lib or something
1563 # ===========================================================================
1564
1565 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1566 cmd_rmdirs = rm -rf $(rm-dirs)
1567
1568 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1569 cmd_rmfiles = rm -f $(rm-files)
1570
1571 # Run depmod only if we have System.map and depmod is executable
1572 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1573 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1574 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1575
1576 # Create temporary dir for module support files
1577 # clean it up only when building all modules
1578 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1579 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1580
1581 # read all saved command lines
1582
1583 targets := $(wildcard $(sort $(targets)))
1584 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1585
1586 ifneq ($(cmd_files),)
1587 $(cmd_files): ; # Do not try to update included dependency files
1588 include $(cmd_files)
1589 endif
1590
1591 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1592 # Usage:
1593 # $(Q)$(MAKE) $(clean)=dir
1594 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1595
1596 endif # skip-makefile
1597
1598 PHONY += FORCE
1599 FORCE:
1600
1601 # Declare the contents of the .PHONY variable as phony. We keep that
1602 # information in a variable so we can use it in if_changed and friends.
1603 .PHONY: $(PHONY)