perf annotate: Introduce alternative method of keeping instructions table
[linux/fpc-iii.git] / Makefile
blob0ede48ba5aaf4e52d6281fa35c82d9cca977b975
1 VERSION = 4
2 PATCHLEVEL = 9
3 SUBLEVEL = 0
4 EXTRAVERSION = -rc6
5 NAME = Psychotic Stoned Sheep
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.
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)
18 # Avoid funny character set dependencies
19 unexport LC_ALL
20 LC_COLLATE=C
21 LC_NUMERIC=C
22 export LC_COLLATE LC_NUMERIC
24 # Avoid interference with shell env settings
25 unexport GREP_OPTIONS
27 # We are using a recursive build, so we need to do a little thinking
28 # to get the ordering right.
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.
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.
43 # Beautify output
44 # ---------------------------------------------------------------------------
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.
50 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
51 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
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.
58 # A simple variant is to prefix commands with $(Q) - that's useful
59 # for commands that shall be hidden in non-verbose mode.
61 # $(Q)ln $@ :<
63 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
64 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
66 # To put more focus on warnings, be less verbose as default
67 # Use 'make V=1' to see the full commands
69 ifeq ("$(origin V)", "command line")
70 KBUILD_VERBOSE = $(V)
71 endif
72 ifndef KBUILD_VERBOSE
73 KBUILD_VERBOSE = 0
74 endif
76 ifeq ($(KBUILD_VERBOSE),1)
77 quiet =
78 Q =
79 else
80 quiet=quiet_
81 Q = @
82 endif
84 # If the user is running make -s (silent mode), suppress echoing of
85 # commands
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%,$(MAKEFLAGS)),)
93 quiet=silent_
94 endif
95 endif
97 export quiet Q KBUILD_VERBOSE
99 # kbuild supports saving output files in a separate directory.
100 # To locate output files in a separate directory two syntaxes are supported.
101 # In both cases the working directory must be the root of the kernel src.
102 # 1) O=
103 # Use "make O=dir/to/store/output/files/"
105 # 2) Set KBUILD_OUTPUT
106 # Set the environment variable KBUILD_OUTPUT to point to the directory
107 # where the output files shall be placed.
108 # export KBUILD_OUTPUT=dir/to/store/output/files/
109 # make
111 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
112 # variable.
114 # KBUILD_SRC is set on invocation of make in OBJ directory
115 # KBUILD_SRC is not intended to be used by the regular user (for now)
116 ifeq ($(KBUILD_SRC),)
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
124 # That's our default target when none is given on the command line
125 PHONY := _all
126 _all:
128 # Cancel implicit rules on top Makefile
129 $(CURDIR)/Makefile Makefile: ;
131 ifneq ($(words $(subst :, ,$(CURDIR))), 1)
132 $(error main directory cannot contain spaces nor colons)
133 endif
135 ifneq ($(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)"))
144 PHONY += $(MAKECMDGOALS) sub-make
146 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
149 sub-make:
150 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
151 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
153 # Leave processing to above invocation of make
154 skip-makefile := 1
155 endif # ifneq ($(KBUILD_OUTPUT),)
156 endif # ifeq ($(KBUILD_SRC),)
158 # We process the rest of the Makefile if this is the final invocation of make
159 ifeq ($(skip-makefile),)
161 # Do not print "Entering directory ...",
162 # but we want to display it when entering to the output directory
163 # so that IDEs/editors are able to understand relative filenames.
164 MAKEFLAGS += --no-print-directory
166 # Call a source code checker (by default, "sparse") as part of the
167 # C compilation.
169 # Use 'make C=1' to enable checking of only re-compiled files.
170 # Use 'make C=2' to enable checking of *all* source files, regardless
171 # of whether they are re-compiled or not.
173 # See the file "Documentation/sparse.txt" for more details, including
174 # where to get the "sparse" utility.
176 ifeq ("$(origin C)", "command line")
177 KBUILD_CHECKSRC = $(C)
178 endif
179 ifndef KBUILD_CHECKSRC
180 KBUILD_CHECKSRC = 0
181 endif
183 # Use make M=dir to specify directory of external module to build
184 # Old syntax make ... SUBDIRS=$PWD is still supported
185 # Setting the environment variable KBUILD_EXTMOD take precedence
186 ifdef SUBDIRS
187 KBUILD_EXTMOD ?= $(SUBDIRS)
188 endif
190 ifeq ("$(origin M)", "command line")
191 KBUILD_EXTMOD := $(M)
192 endif
194 # If building an external module we do not care about the all: rule
195 # but instead _all depend on modules
196 PHONY += all
197 ifeq ($(KBUILD_EXTMOD),)
198 _all: all
199 else
200 _all: modules
201 endif
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)
218 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
220 export srctree objtree VPATH
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.
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/ )
235 # Cross compiling and selecting different set of gcc/bin-utils
236 # ---------------------------------------------------------------------------
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.
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:"%"=%)
258 # Architecture as present in compile.h
259 UTS_MACHINE := $(ARCH)
260 SRCARCH := $(ARCH)
262 # Additional ARCH settings for x86
263 ifeq ($(ARCH),i386)
264 SRCARCH := x86
265 endif
266 ifeq ($(ARCH),x86_64)
267 SRCARCH := x86
268 endif
270 # Additional ARCH settings for sparc
271 ifeq ($(ARCH),sparc32)
272 SRCARCH := sparc
273 endif
274 ifeq ($(ARCH),sparc64)
275 SRCARCH := sparc
276 endif
278 # Additional ARCH settings for sh
279 ifeq ($(ARCH),sh64)
280 SRCARCH := sh
281 endif
283 # Additional ARCH settings for tile
284 ifeq ($(ARCH),tilepro)
285 SRCARCH := tile
286 endif
287 ifeq ($(ARCH),tilegx)
288 SRCARCH := tile
289 endif
291 # Where to locate arch specific headers
292 hdr-arch := $(SRCARCH)
294 KCONFIG_CONFIG ?= .config
295 export KCONFIG_CONFIG
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)
302 HOSTCC = gcc
303 HOSTCXX = g++
304 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
305 HOSTCXXFLAGS = -O2
307 ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
308 HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
309 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
310 endif
312 # Decide whether to build built-in, modular, or both.
313 # Normally, just do built-in.
315 KBUILD_MODULES :=
316 KBUILD_BUILTIN := 1
318 # If we have only "make modules", don't compile built-in objects.
319 # When we're building modules with modversions, we need to consider
320 # the built-in objects during the descend as well, in order to
321 # make sure the checksums are up to date before we record them.
323 ifeq ($(MAKECMDGOALS),modules)
324 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
325 endif
327 # If we have "make <whatever> modules", compile modules
328 # in addition to whatever we do anyway.
329 # Just "make" or "make all" shall build modules as well
331 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
332 KBUILD_MODULES := 1
333 endif
335 ifeq ($(MAKECMDGOALS),)
336 KBUILD_MODULES := 1
337 endif
339 export KBUILD_MODULES KBUILD_BUILTIN
340 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
342 # We need some generic definitions (do not try to remake the file).
343 scripts/Kbuild.include: ;
344 include scripts/Kbuild.include
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
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 -Wno-maybe-uninitialized
374 CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,)
377 # Use USERINCLUDE when you must reference the UAPI directories only.
378 USERINCLUDE := \
379 -I$(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 $(srctree)/include/linux/kconfig.h
385 # Use LINUXINCLUDE when you must reference the include/ directory.
386 # Needed to be compatible with the O= option
387 LINUXINCLUDE := \
388 -I$(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
394 LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE))
396 KBUILD_CPPFLAGS := -D__KERNEL__
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 $(call cc-option,-fno-PIE)
405 KBUILD_AFLAGS_KERNEL :=
406 KBUILD_CFLAGS_KERNEL :=
407 KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
408 KBUILD_AFLAGS_MODULE := -DMODULE
409 KBUILD_CFLAGS_MODULE := -DMODULE
410 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
412 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
413 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
414 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
416 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
417 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
418 export CPP AR NM STRIP OBJCOPY OBJDUMP
419 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
420 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
422 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
423 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
424 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
425 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
426 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
427 export KBUILD_ARFLAGS
429 # When compiling out-of-tree modules, put MODVERDIR in the module
430 # tree rather than in the kernel tree. The kernel tree might
431 # even be read-only.
432 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
434 # Files to ignore in find ... statements
436 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
437 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
438 -prune -o
439 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
440 --exclude CVS --exclude .pc --exclude .hg --exclude .git
442 # ===========================================================================
443 # Rules shared between *config targets and build targets
445 # Basic helpers built in scripts/
446 PHONY += scripts_basic
447 scripts_basic:
448 $(Q)$(MAKE) $(build)=scripts/basic
449 $(Q)rm -f .tmp_quiet_recordmcount
451 # To avoid any implicit rule to kick in, define an empty command.
452 scripts/basic/%: scripts_basic ;
454 PHONY += outputmakefile
455 # outputmakefile generates a Makefile in the output directory, if using a
456 # separate output directory. This allows convenient use of make in the
457 # output directory.
458 outputmakefile:
459 ifneq ($(KBUILD_SRC),)
460 $(Q)ln -fsn $(srctree) source
461 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
462 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
463 endif
465 # Support for using generic headers in asm-generic
466 PHONY += asm-generic
467 asm-generic:
468 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
469 src=asm obj=arch/$(SRCARCH)/include/generated/asm
470 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
471 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
473 # To make sure we do not include .config for any of the *config targets
474 # catch them early, and hand them over to scripts/kconfig/Makefile
475 # It is allowed to specify more targets when calling make, including
476 # mixing *config targets and build targets.
477 # For example 'make oldconfig all'.
478 # Detect when mixed targets is specified, and make a second invocation
479 # of make so .config is not included in this case either (for *config).
481 version_h := include/generated/uapi/linux/version.h
482 old_version_h := include/linux/version.h
484 no-dot-config-targets := clean mrproper distclean \
485 cscope gtags TAGS tags help% %docs check% coccicheck \
486 $(version_h) headers_% archheaders archscripts \
487 kernelversion %src-pkg
489 config-targets := 0
490 mixed-targets := 0
491 dot-config := 1
493 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
494 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
495 dot-config := 0
496 endif
497 endif
499 ifeq ($(KBUILD_EXTMOD),)
500 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
501 config-targets := 1
502 ifneq ($(words $(MAKECMDGOALS)),1)
503 mixed-targets := 1
504 endif
505 endif
506 endif
507 # install and module_install need also be processed one by one
508 ifneq ($(filter install,$(MAKECMDGOALS)),)
509 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
510 mixed-targets := 1
511 endif
512 endif
514 ifeq ($(mixed-targets),1)
515 # ===========================================================================
516 # We're called with mixed targets (*config and build targets).
517 # Handle them one by one.
519 PHONY += $(MAKECMDGOALS) __build_one_by_one
521 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
524 __build_one_by_one:
525 $(Q)set -e; \
526 for i in $(MAKECMDGOALS); do \
527 $(MAKE) -f $(srctree)/Makefile $$i; \
528 done
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
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 arch/$(SRCARCH)/Makefile
540 export KBUILD_DEFCONFIG KBUILD_KCONFIG
542 config: scripts_basic outputmakefile FORCE
543 $(Q)$(MAKE) $(build)=scripts/kconfig $@
545 %config: scripts_basic outputmakefile FORCE
546 $(Q)$(MAKE) $(build)=scripts/kconfig $@
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.
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 gcc-plugins
560 $(Q)$(MAKE) $(build)=$(@)
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 virt-y := virt/
569 endif # KBUILD_EXTMOD
571 ifeq ($(dot-config),1)
572 # Read in config
573 -include include/config/auto.conf
575 ifeq ($(KBUILD_EXTMOD),)
576 # Read in dependencies to all Kconfig* files, make sure to run
577 # oldconfig if changes are detected.
578 -include include/config/auto.conf.cmd
580 # To avoid any implicit rule to kick in, define an empty command
581 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
583 # If .config is newer than include/config/auto.conf, someone tinkered
584 # with it and forgot to run make oldconfig.
585 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
586 # we execute the config step to be sure to catch updated Kconfig files
587 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
588 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
589 else
590 # external modules needs include/generated/autoconf.h and include/config/auto.conf
591 # but do not care if they are up-to-date. Use auto.conf to trigger the test
592 PHONY += include/config/auto.conf
594 include/config/auto.conf:
595 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
596 echo >&2; \
597 echo >&2 " ERROR: Kernel configuration is invalid."; \
598 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
599 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
600 echo >&2 ; \
601 /bin/false)
603 endif # KBUILD_EXTMOD
605 else
606 # Dummy target needed, because used as prerequisite
607 include/config/auto.conf: ;
608 endif # $(dot-config)
610 # The all: target is the default when no target is given on the
611 # command line.
612 # This allow a user to issue only 'make' to build a kernel including modules
613 # Defaults to vmlinux, but the arch makefile usually adds further targets
614 all: vmlinux
616 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
617 # values of the respective KBUILD_* variables
618 ARCH_CPPFLAGS :=
619 ARCH_AFLAGS :=
620 ARCH_CFLAGS :=
621 include arch/$(SRCARCH)/Makefile
623 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
624 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
626 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
627 KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,)
628 KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
629 endif
631 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
632 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
633 else
634 ifdef CONFIG_PROFILE_ALL_BRANCHES
635 KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
636 else
637 KBUILD_CFLAGS += -O2
638 endif
639 endif
641 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
642 $(call cc-disable-warning,maybe-uninitialized,))
644 # Tell gcc to never replace conditional load with a non-conditional one
645 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
647 include scripts/Makefile.gcc-plugins
649 ifdef CONFIG_READABLE_ASM
650 # Disable optimizations that make assembler listings hard to read.
651 # reorder blocks reorders the control in the function
652 # ipa clone creates specialized cloned functions
653 # partial inlining inlines only parts of functions
654 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
655 $(call cc-option,-fno-ipa-cp-clone,) \
656 $(call cc-option,-fno-partial-inlining)
657 endif
659 ifneq ($(CONFIG_FRAME_WARN),0)
660 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
661 endif
663 # This selects the stack protector compiler flag. Testing it is delayed
664 # until after .config has been reprocessed, in the prepare-compiler-check
665 # target.
666 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
667 stackp-flag := -fstack-protector
668 stackp-name := REGULAR
669 else
670 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
671 stackp-flag := -fstack-protector-strong
672 stackp-name := STRONG
673 else
674 # Force off for distro compilers that enable stack protector by default.
675 stackp-flag := $(call cc-option, -fno-stack-protector)
676 endif
677 endif
678 # Find arch-specific stack protector compiler sanity-checking script.
679 ifdef CONFIG_CC_STACKPROTECTOR
680 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
681 stackp-check := $(wildcard $(stackp-path))
682 endif
683 KBUILD_CFLAGS += $(stackp-flag)
685 ifeq ($(cc-name),clang)
686 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
687 KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
688 KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
689 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
690 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
691 # Quiet clang warning: comparison of unsigned expression < 0 is always false
692 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
693 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
694 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
695 # See modpost pattern 2
696 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
697 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
698 else
700 # These warnings generated too much noise in a regular build.
701 # Use make W=1 to enable them (see scripts/Makefile.build)
702 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
703 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
704 endif
706 ifdef CONFIG_FRAME_POINTER
707 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
708 else
709 # Some targets (ARM with Thumb2, for example), can't be built with frame
710 # pointers. For those, we don't have FUNCTION_TRACER automatically
711 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
712 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
713 # -fomit-frame-pointer with FUNCTION_TRACER.
714 ifndef CONFIG_FUNCTION_TRACER
715 KBUILD_CFLAGS += -fomit-frame-pointer
716 endif
717 endif
719 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
721 ifdef CONFIG_DEBUG_INFO
722 ifdef CONFIG_DEBUG_INFO_SPLIT
723 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
724 else
725 KBUILD_CFLAGS += -g
726 endif
727 KBUILD_AFLAGS += -Wa,-gdwarf-2
728 endif
729 ifdef CONFIG_DEBUG_INFO_DWARF4
730 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
731 endif
733 ifdef CONFIG_DEBUG_INFO_REDUCED
734 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
735 $(call cc-option,-fno-var-tracking)
736 endif
738 ifdef CONFIG_FUNCTION_TRACER
739 ifndef CC_FLAGS_FTRACE
740 CC_FLAGS_FTRACE := -pg
741 endif
742 export CC_FLAGS_FTRACE
743 ifdef CONFIG_HAVE_FENTRY
744 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
745 endif
746 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
747 KBUILD_AFLAGS += $(CC_USING_FENTRY)
748 ifdef CONFIG_DYNAMIC_FTRACE
749 ifdef CONFIG_HAVE_C_RECORDMCOUNT
750 BUILD_C_RECORDMCOUNT := y
751 export BUILD_C_RECORDMCOUNT
752 endif
753 endif
754 endif
756 # We trigger additional mismatches with less inlining
757 ifdef CONFIG_DEBUG_SECTION_MISMATCH
758 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
759 endif
761 # arch Makefile may override CC so keep this after arch Makefile is included
762 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
763 CHECKFLAGS += $(NOSTDINC_FLAGS)
765 # warn about C99 declaration after statement
766 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
768 # disable pointer signed / unsigned warnings in gcc 4.0
769 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
771 # disable invalid "can't wrap" optimizations for signed / pointers
772 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
774 # conserve stack if available
775 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
777 # disallow errors like 'EXPORT_GPL(foo);' with missing header
778 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
780 # require functions to have arguments in prototypes, not empty 'int foo()'
781 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
783 # Prohibit date/time macros, which would make the build non-deterministic
784 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
786 # enforce correct pointer usage
787 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
789 # use the deterministic mode of AR if available
790 KBUILD_ARFLAGS := $(call ar-option,D)
792 # check for 'asm goto'
793 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
794 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
795 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
796 endif
798 include scripts/Makefile.kasan
799 include scripts/Makefile.extrawarn
800 include scripts/Makefile.ubsan
802 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
803 # last assignments
804 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
805 KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
806 KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
808 # Use --build-id when available.
809 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
810 $(call cc-ldoption, -Wl$(comma)--build-id,))
811 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
812 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
814 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
815 LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
816 endif
818 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
819 LDFLAGS_vmlinux += $(call ld-option, -X,)
820 endif
822 # Default kernel image to build when no specific target is given.
823 # KBUILD_IMAGE may be overruled on the command line or
824 # set in the environment
825 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
826 # this default value
827 export KBUILD_IMAGE ?= vmlinux
830 # INSTALL_PATH specifies where to place the updated kernel and system map
831 # images. Default is /boot, but you can set it to other values
832 export INSTALL_PATH ?= /boot
835 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
836 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
837 # an argument if needed. Otherwise it defaults to the kernel install path
839 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
842 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
843 # relocations required by build roots. This is not defined in the
844 # makefile but the argument can be passed to make if needed.
847 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
848 export MODLIB
851 # INSTALL_MOD_STRIP, if defined, will cause modules to be
852 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
853 # the default option --strip-debug will be used. Otherwise,
854 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
856 ifdef INSTALL_MOD_STRIP
857 ifeq ($(INSTALL_MOD_STRIP),1)
858 mod_strip_cmd = $(STRIP) --strip-debug
859 else
860 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
861 endif # INSTALL_MOD_STRIP=1
862 else
863 mod_strip_cmd = true
864 endif # INSTALL_MOD_STRIP
865 export mod_strip_cmd
867 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
868 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
869 # or CONFIG_MODULE_COMPRESS_XZ.
871 mod_compress_cmd = true
872 ifdef CONFIG_MODULE_COMPRESS
873 ifdef CONFIG_MODULE_COMPRESS_GZIP
874 mod_compress_cmd = gzip -n -f
875 endif # CONFIG_MODULE_COMPRESS_GZIP
876 ifdef CONFIG_MODULE_COMPRESS_XZ
877 mod_compress_cmd = xz -f
878 endif # CONFIG_MODULE_COMPRESS_XZ
879 endif # CONFIG_MODULE_COMPRESS
880 export mod_compress_cmd
882 # Select initial ramdisk compression format, default is gzip(1).
883 # This shall be used by the dracut(8) tool while creating an initramfs image.
885 INITRD_COMPRESS-y := gzip
886 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
887 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
888 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
889 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
890 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
891 # do not export INITRD_COMPRESS, since we didn't actually
892 # choose a sane default compression above.
893 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
895 ifdef CONFIG_MODULE_SIG_ALL
896 $(eval $(call config_filename,MODULE_SIG_KEY))
898 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
899 else
900 mod_sign_cmd = true
901 endif
902 export mod_sign_cmd
905 ifeq ($(KBUILD_EXTMOD),)
906 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
908 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
909 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
910 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
912 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
913 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
915 init-y := $(patsubst %/, %/built-in.o, $(init-y))
916 core-y := $(patsubst %/, %/built-in.o, $(core-y))
917 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
918 net-y := $(patsubst %/, %/built-in.o, $(net-y))
919 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
920 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
921 libs-y := $(libs-y1) $(libs-y2)
922 virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
924 # Externally visible symbols (used by link-vmlinux.sh)
925 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
926 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
927 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
928 export LDFLAGS_vmlinux
929 # used by scripts/pacmage/Makefile
930 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
932 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
934 # Include targets which we want to execute sequentially if the rest of the
935 # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
936 # evaluated more than once.
937 PHONY += vmlinux_prereq
938 vmlinux_prereq: $(vmlinux-deps) FORCE
939 ifdef CONFIG_HEADERS_CHECK
940 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
941 endif
942 ifdef CONFIG_GDB_SCRIPTS
943 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
944 endif
945 ifdef CONFIG_TRIM_UNUSED_KSYMS
946 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
947 "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq"
948 endif
950 # standalone target for easier testing
951 include/generated/autoksyms.h: FORCE
952 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
954 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
956 # Final link of vmlinux with optional arch pass after final link
957 cmd_link-vmlinux = \
958 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \
959 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
961 vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
962 +$(call if_changed,link-vmlinux)
964 # Build samples along the rest of the kernel
965 ifdef CONFIG_SAMPLES
966 vmlinux-dirs += samples
967 endif
969 # The actual objects are generated when descending,
970 # make sure no implicit rule kicks in
971 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
973 # Handle descending into subdirectories listed in $(vmlinux-dirs)
974 # Preset locale variables to speed up the build process. Limit locale
975 # tweaks to this spot to avoid wrong language settings when running
976 # make menuconfig etc.
977 # Error messages still appears in the original language
979 PHONY += $(vmlinux-dirs)
980 $(vmlinux-dirs): prepare scripts
981 $(Q)$(MAKE) $(build)=$@
983 define filechk_kernel.release
984 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
985 endef
987 # Store (new) KERNELRELEASE string in include/config/kernel.release
988 include/config/kernel.release: include/config/auto.conf FORCE
989 $(call filechk,kernel.release)
992 # Things we need to do before we recursively start building the kernel
993 # or the modules are listed in "prepare".
994 # A multi level approach is used. prepareN is processed before prepareN-1.
995 # archprepare is used in arch Makefiles and when processed asm symlink,
996 # version.h and scripts_basic is processed / created.
998 # Listed in dependency order
999 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
1001 # prepare3 is used to check if we are building in a separate output directory,
1002 # and if so do:
1003 # 1) Check that make has not been executed in the kernel src $(srctree)
1004 prepare3: include/config/kernel.release
1005 ifneq ($(KBUILD_SRC),)
1006 @$(kecho) ' Using $(srctree) as source for kernel'
1007 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1008 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1009 echo >&2 " in the '$(srctree)' directory.";\
1010 /bin/false; \
1012 endif
1014 # prepare2 creates a makefile if using a separate output directory.
1015 # From this point forward, .config has been reprocessed, so any rules
1016 # that need to depend on updated CONFIG_* values can be checked here.
1017 prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
1019 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
1020 include/config/auto.conf
1021 $(cmd_crmodverdir)
1022 $(Q)test -e include/generated/autoksyms.h || \
1023 touch include/generated/autoksyms.h
1025 archprepare: archheaders archscripts prepare1 scripts_basic
1027 prepare0: archprepare gcc-plugins
1028 $(Q)$(MAKE) $(build)=.
1030 # All the preparing..
1031 prepare: prepare0 prepare-objtool
1033 ifdef CONFIG_STACK_VALIDATION
1034 has_libelf := $(call try-run,\
1035 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
1036 ifeq ($(has_libelf),1)
1037 objtool_target := tools/objtool FORCE
1038 else
1039 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
1040 SKIP_STACK_VALIDATION := 1
1041 export SKIP_STACK_VALIDATION
1042 endif
1043 endif
1045 PHONY += prepare-objtool
1046 prepare-objtool: $(objtool_target)
1048 # Check for CONFIG flags that require compiler support. Abort the build
1049 # after .config has been processed, but before the kernel build starts.
1051 # For security-sensitive CONFIG options, we don't want to fallback and/or
1052 # silently change which compiler flags will be used, since that leads to
1053 # producing kernels with different security feature characteristics
1054 # depending on the compiler used. (For example, "But I selected
1055 # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1056 PHONY += prepare-compiler-check
1057 prepare-compiler-check: FORCE
1058 # Make sure compiler supports requested stack protector flag.
1059 ifdef stackp-name
1060 ifeq ($(call cc-option, $(stackp-flag)),)
1061 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1062 $(stackp-flag) not supported by compiler >&2 && exit 1
1063 endif
1064 endif
1065 # Make sure compiler does not have buggy stack-protector support.
1066 ifdef stackp-check
1067 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
1068 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1069 $(stackp-flag) available but compiler is broken >&2 && exit 1
1070 endif
1071 endif
1074 # Generate some files
1075 # ---------------------------------------------------------------------------
1077 # KERNELRELEASE can change from a few different places, meaning version.h
1078 # needs to be updated, so this check is forced on all builds
1080 uts_len := 64
1081 define filechk_utsrelease.h
1082 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1083 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1084 exit 1; \
1085 fi; \
1086 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1087 endef
1089 define filechk_version.h
1090 (echo \#define LINUX_VERSION_CODE $(shell \
1091 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1092 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1093 endef
1095 $(version_h): $(srctree)/Makefile FORCE
1096 $(call filechk,version.h)
1097 $(Q)rm -f $(old_version_h)
1099 include/generated/utsrelease.h: include/config/kernel.release FORCE
1100 $(call filechk,utsrelease.h)
1102 PHONY += headerdep
1103 headerdep:
1104 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1105 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1107 # ---------------------------------------------------------------------------
1108 # Firmware install
1109 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1110 export INSTALL_FW_PATH
1112 PHONY += firmware_install
1113 firmware_install:
1114 @mkdir -p $(objtree)/firmware
1115 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1117 # ---------------------------------------------------------------------------
1118 # Kernel headers
1120 #Default location for installed headers
1121 export INSTALL_HDR_PATH = $(objtree)/usr
1123 # If we do an all arch process set dst to asm-$(hdr-arch)
1124 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1126 PHONY += archheaders
1127 archheaders:
1129 PHONY += archscripts
1130 archscripts:
1132 PHONY += __headers
1133 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts
1134 $(Q)$(MAKE) $(build)=scripts build_unifdef
1136 PHONY += headers_install_all
1137 headers_install_all:
1138 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1140 PHONY += headers_install
1141 headers_install: __headers
1142 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1143 $(error Headers not exportable for the $(SRCARCH) architecture))
1144 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1145 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
1147 PHONY += headers_check_all
1148 headers_check_all: headers_install_all
1149 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1151 PHONY += headers_check
1152 headers_check: headers_install
1153 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1154 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
1156 # ---------------------------------------------------------------------------
1157 # Kernel selftest
1159 PHONY += kselftest
1160 kselftest:
1161 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1163 kselftest-clean:
1164 $(Q)$(MAKE) -C tools/testing/selftests clean
1166 PHONY += kselftest-merge
1167 kselftest-merge:
1168 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1169 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1170 -m $(objtree)/.config \
1171 $(srctree)/tools/testing/selftests/*/config
1172 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1174 # ---------------------------------------------------------------------------
1175 # Modules
1177 ifdef CONFIG_MODULES
1179 # By default, build modules as well
1181 all: modules
1183 # Build modules
1185 # A module can be listed more than once in obj-m resulting in
1186 # duplicate lines in modules.order files. Those are removed
1187 # using awk while concatenating to the final file.
1189 PHONY += modules
1190 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1191 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1192 @$(kecho) ' Building modules, stage 2.';
1193 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1194 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1196 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1197 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1199 %/modules.builtin: include/config/auto.conf
1200 $(Q)$(MAKE) $(modbuiltin)=$*
1203 # Target to prepare building external modules
1204 PHONY += modules_prepare
1205 modules_prepare: prepare scripts
1207 # Target to install modules
1208 PHONY += modules_install
1209 modules_install: _modinst_ _modinst_post
1211 PHONY += _modinst_
1212 _modinst_:
1213 @rm -rf $(MODLIB)/kernel
1214 @rm -f $(MODLIB)/source
1215 @mkdir -p $(MODLIB)/kernel
1216 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1217 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1218 rm -f $(MODLIB)/build ; \
1219 ln -s $(CURDIR) $(MODLIB)/build ; \
1221 @cp -f $(objtree)/modules.order $(MODLIB)/
1222 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1223 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1225 # This depmod is only for convenience to give the initial
1226 # boot a modules.dep even before / is mounted read-write. However the
1227 # boot script depmod is the master version.
1228 PHONY += _modinst_post
1229 _modinst_post: _modinst_
1230 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1231 $(call cmd,depmod)
1233 ifeq ($(CONFIG_MODULE_SIG), y)
1234 PHONY += modules_sign
1235 modules_sign:
1236 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1237 endif
1239 else # CONFIG_MODULES
1241 # Modules not configured
1242 # ---------------------------------------------------------------------------
1244 PHONY += modules modules_install
1245 modules modules_install:
1246 @echo >&2
1247 @echo >&2 "The present kernel configuration has modules disabled."
1248 @echo >&2 "Type 'make config' and enable loadable module support."
1249 @echo >&2 "Then build a kernel with module support enabled."
1250 @echo >&2
1251 @exit 1
1253 endif # CONFIG_MODULES
1256 # Cleaning is done on three levels.
1257 # make clean Delete most generated files
1258 # Leave enough to build external modules
1259 # make mrproper Delete the current configuration, and all generated files
1260 # make distclean Remove editor backup files, patch leftover files and the like
1262 # Directories & files removed with 'make clean'
1263 CLEAN_DIRS += $(MODVERDIR)
1265 # Directories & files removed with 'make mrproper'
1266 MRPROPER_DIRS += include/config usr/include include/generated \
1267 arch/*/include/generated .tmp_objdiff
1268 MRPROPER_FILES += .config .config.old .version .old_version \
1269 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1270 signing_key.pem signing_key.priv signing_key.x509 \
1271 x509.genkey extra_certificates signing_key.x509.keyid \
1272 signing_key.x509.signer vmlinux-gdb.py
1274 # clean - Delete most, but leave enough to build external modules
1276 clean: rm-dirs := $(CLEAN_DIRS)
1277 clean: rm-files := $(CLEAN_FILES)
1278 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1280 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1281 $(clean-dirs):
1282 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1284 vmlinuxclean:
1285 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1286 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1288 clean: archclean vmlinuxclean
1290 # mrproper - Delete all generated files, including .config
1292 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1293 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1294 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1296 PHONY += $(mrproper-dirs) mrproper archmrproper
1297 $(mrproper-dirs):
1298 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1300 mrproper: clean archmrproper $(mrproper-dirs)
1301 $(call cmd,rmdirs)
1302 $(call cmd,rmfiles)
1304 # distclean
1306 PHONY += distclean
1308 distclean: mrproper
1309 @find $(srctree) $(RCS_FIND_IGNORE) \
1310 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1311 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1312 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1313 -type f -print | xargs rm -f
1316 # Packaging of the kernel to various formats
1317 # ---------------------------------------------------------------------------
1318 # rpm target kept for backward compatibility
1319 package-dir := scripts/package
1321 %src-pkg: FORCE
1322 $(Q)$(MAKE) $(build)=$(package-dir) $@
1323 %pkg: include/config/kernel.release FORCE
1324 $(Q)$(MAKE) $(build)=$(package-dir) $@
1325 rpm: include/config/kernel.release FORCE
1326 $(Q)$(MAKE) $(build)=$(package-dir) $@
1329 # Brief documentation of the typical targets used
1330 # ---------------------------------------------------------------------------
1332 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1333 boards := $(sort $(notdir $(boards)))
1334 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1335 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1337 PHONY += help
1338 help:
1339 @echo 'Cleaning targets:'
1340 @echo ' clean - Remove most generated files but keep the config and'
1341 @echo ' enough build support to build external modules'
1342 @echo ' mrproper - Remove all generated files + config + various backup files'
1343 @echo ' distclean - mrproper + remove editor backup and patch files'
1344 @echo ''
1345 @echo 'Configuration targets:'
1346 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1347 @echo ''
1348 @echo 'Other generic targets:'
1349 @echo ' all - Build all targets marked with [*]'
1350 @echo '* vmlinux - Build the bare kernel'
1351 @echo '* modules - Build all modules'
1352 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1353 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1354 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1355 @echo ' dir/ - Build all files in dir and below'
1356 @echo ' dir/file.[ois] - Build specified target only'
1357 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1358 @echo ' (requires a recent binutils and recent build (System.map))'
1359 @echo ' dir/file.ko - Build module including final link'
1360 @echo ' modules_prepare - Set up for building external modules'
1361 @echo ' tags/TAGS - Generate tags file for editors'
1362 @echo ' cscope - Generate cscope index'
1363 @echo ' gtags - Generate GNU GLOBAL index'
1364 @echo ' kernelrelease - Output the release version string (use with make -s)'
1365 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1366 @echo ' image_name - Output the image name (use with make -s)'
1367 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1368 echo ' (default: $(INSTALL_HDR_PATH))'; \
1369 echo ''
1370 @echo 'Static analysers'
1371 @echo ' checkstack - Generate a list of stack hogs'
1372 @echo ' namespacecheck - Name space analysis on compiled kernel'
1373 @echo ' versioncheck - Sanity check on version.h usage'
1374 @echo ' includecheck - Check for duplicate included header files'
1375 @echo ' export_report - List the usages of all exported symbols'
1376 @echo ' headers_check - Sanity check on exported headers'
1377 @echo ' headerdep - Detect inclusion cycles in headers'
1378 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1379 @echo ''
1380 @echo 'Kernel selftest'
1381 @echo ' kselftest - Build and run kernel selftest (run as root)'
1382 @echo ' Build, install, and boot kernel before'
1383 @echo ' running kselftest on it'
1384 @echo ' kselftest-clean - Remove all generated kselftest files'
1385 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed'
1386 @echo ' .config.'
1387 @echo ''
1388 @echo 'Kernel packaging:'
1389 @$(MAKE) $(build)=$(package-dir) help
1390 @echo ''
1391 @echo 'Documentation targets:'
1392 @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp
1393 @echo ''
1394 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1395 @echo ''
1396 @echo 'Architecture specific targets ($(SRCARCH)):'
1397 @$(if $(archhelp),$(archhelp),\
1398 echo ' No architecture specific help defined for $(SRCARCH)')
1399 @echo ''
1400 @$(if $(boards), \
1401 $(foreach b, $(boards), \
1402 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1403 echo '')
1404 @$(if $(board-dirs), \
1405 $(foreach b, $(board-dirs), \
1406 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1407 printf " %-16s - Show all of the above\\n" help-boards; \
1408 echo '')
1410 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1411 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1412 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1413 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1414 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1415 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1416 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1417 @echo ' 1: warnings which may be relevant and do not occur too often'
1418 @echo ' 2: warnings which occur quite often but may still be relevant'
1419 @echo ' 3: more obscure warnings, can most likely be ignored'
1420 @echo ' Multiple levels can be combined with W=12 or W=123'
1421 @echo ''
1422 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1423 @echo 'For further info see the ./README file'
1426 help-board-dirs := $(addprefix help-,$(board-dirs))
1428 help-boards: $(help-board-dirs)
1430 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1432 $(help-board-dirs): help-%:
1433 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1434 @$(if $(boards-per-dir), \
1435 $(foreach b, $(boards-per-dir), \
1436 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1437 echo '')
1440 # Documentation targets
1441 # ---------------------------------------------------------------------------
1442 DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs
1443 PHONY += $(DOC_TARGETS)
1444 $(DOC_TARGETS): scripts_basic FORCE
1445 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
1446 $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@
1447 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1449 else # KBUILD_EXTMOD
1452 # External module support.
1453 # When building external modules the kernel used as basis is considered
1454 # read-only, and no consistency checks are made and the make
1455 # system is not used on the basis kernel. If updates are required
1456 # in the basis kernel ordinary make commands (without M=...) must
1457 # be used.
1459 # The following are the only valid targets when building external
1460 # modules.
1461 # make M=dir clean Delete all automatically generated files
1462 # make M=dir modules Make all modules in specified dir
1463 # make M=dir Same as 'make M=dir modules'
1464 # make M=dir modules_install
1465 # Install the modules built in the module directory
1466 # Assumes install directory is already created
1468 # We are always building modules
1469 KBUILD_MODULES := 1
1470 PHONY += crmodverdir
1471 crmodverdir:
1472 $(cmd_crmodverdir)
1474 PHONY += $(objtree)/Module.symvers
1475 $(objtree)/Module.symvers:
1476 @test -e $(objtree)/Module.symvers || ( \
1477 echo; \
1478 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1479 echo " is missing; modules will have no dependencies and modversions."; \
1480 echo )
1482 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1483 PHONY += $(module-dirs) modules
1484 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1485 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1487 modules: $(module-dirs)
1488 @$(kecho) ' Building modules, stage 2.';
1489 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1491 PHONY += modules_install
1492 modules_install: _emodinst_ _emodinst_post
1494 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1495 PHONY += _emodinst_
1496 _emodinst_:
1497 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1498 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1500 PHONY += _emodinst_post
1501 _emodinst_post: _emodinst_
1502 $(call cmd,depmod)
1504 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1506 PHONY += $(clean-dirs) clean
1507 $(clean-dirs):
1508 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1510 clean: rm-dirs := $(MODVERDIR)
1511 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1513 PHONY += help
1514 help:
1515 @echo ' Building external modules.'
1516 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1517 @echo ''
1518 @echo ' modules - default target, build the module(s)'
1519 @echo ' modules_install - install the module'
1520 @echo ' clean - remove generated files in module directory only'
1521 @echo ''
1523 # Dummies...
1524 PHONY += prepare scripts
1525 prepare: ;
1526 scripts: ;
1527 endif # KBUILD_EXTMOD
1529 clean: $(clean-dirs)
1530 $(call cmd,rmdirs)
1531 $(call cmd,rmfiles)
1532 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1533 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1534 -o -name '*.ko.*' \
1535 -o -name '*.dwo' \
1536 -o -name '*.su' \
1537 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1538 -o -name '*.symtypes' -o -name 'modules.order' \
1539 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1540 -o -name '*.c.[012]*.*' \
1541 -o -name '*.gcno' \) -type f -print | xargs rm -f
1543 # Generate tags for editors
1544 # ---------------------------------------------------------------------------
1545 quiet_cmd_tags = GEN $@
1546 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1548 tags TAGS cscope gtags: FORCE
1549 $(call cmd,tags)
1551 # Scripts to check various things for consistency
1552 # ---------------------------------------------------------------------------
1554 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1556 includecheck:
1557 find $(srctree)/* $(RCS_FIND_IGNORE) \
1558 -name '*.[hcS]' -type f -print | sort \
1559 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1561 versioncheck:
1562 find $(srctree)/* $(RCS_FIND_IGNORE) \
1563 -name '*.[hcS]' -type f -print | sort \
1564 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1566 coccicheck:
1567 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1569 namespacecheck:
1570 $(PERL) $(srctree)/scripts/namespace.pl
1572 export_report:
1573 $(PERL) $(srctree)/scripts/export_report.pl
1575 endif #ifeq ($(config-targets),1)
1576 endif #ifeq ($(mixed-targets),1)
1578 PHONY += checkstack kernelrelease kernelversion image_name
1580 # UML needs a little special treatment here. It wants to use the host
1581 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1582 # else wants $(ARCH), including people doing cross-builds, which means
1583 # that $(SUBARCH) doesn't work here.
1584 ifeq ($(ARCH), um)
1585 CHECKSTACK_ARCH := $(SUBARCH)
1586 else
1587 CHECKSTACK_ARCH := $(ARCH)
1588 endif
1589 checkstack:
1590 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1591 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1593 kernelrelease:
1594 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1596 kernelversion:
1597 @echo $(KERNELVERSION)
1599 image_name:
1600 @echo $(KBUILD_IMAGE)
1602 # Clear a bunch of variables before executing the submake
1603 tools/: FORCE
1604 $(Q)mkdir -p $(objtree)/tools
1605 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
1607 tools/%: FORCE
1608 $(Q)mkdir -p $(objtree)/tools
1609 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
1611 # Single targets
1612 # ---------------------------------------------------------------------------
1613 # Single targets are compatible with:
1614 # - build with mixed source and output
1615 # - build with separate output dir 'make O=...'
1616 # - external modules
1618 # target-dir => where to store outputfile
1619 # build-dir => directory in kernel source tree to use
1621 ifeq ($(KBUILD_EXTMOD),)
1622 build-dir = $(patsubst %/,%,$(dir $@))
1623 target-dir = $(dir $@)
1624 else
1625 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1626 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1627 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1628 endif
1630 %.s: %.c prepare scripts FORCE
1631 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1632 %.i: %.c prepare scripts FORCE
1633 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1634 %.o: %.c prepare scripts FORCE
1635 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1636 %.lst: %.c prepare scripts FORCE
1637 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1638 %.s: %.S prepare scripts FORCE
1639 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1640 %.o: %.S prepare scripts FORCE
1641 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1642 %.symtypes: %.c prepare scripts FORCE
1643 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1645 # Modules
1646 /: prepare scripts FORCE
1647 $(cmd_crmodverdir)
1648 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1649 $(build)=$(build-dir)
1650 # Make sure the latest headers are built for Documentation
1651 Documentation/ samples/: headers_install
1652 %/: prepare scripts FORCE
1653 $(cmd_crmodverdir)
1654 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1655 $(build)=$(build-dir)
1656 %.ko: prepare scripts FORCE
1657 $(cmd_crmodverdir)
1658 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1659 $(build)=$(build-dir) $(@:.ko=.o)
1660 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1662 # FIXME Should go into a make.lib or something
1663 # ===========================================================================
1665 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1666 cmd_rmdirs = rm -rf $(rm-dirs)
1668 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1669 cmd_rmfiles = rm -f $(rm-files)
1671 # Run depmod only if we have System.map and depmod is executable
1672 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1673 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1674 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1676 # Create temporary dir for module support files
1677 # clean it up only when building all modules
1678 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1679 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1681 # read all saved command lines
1683 targets := $(wildcard $(sort $(targets)))
1684 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1686 ifneq ($(cmd_files),)
1687 $(cmd_files): ; # Do not try to update included dependency files
1688 include $(cmd_files)
1689 endif
1691 endif # skip-makefile
1693 PHONY += FORCE
1694 FORCE:
1696 # Declare the contents of the .PHONY variable as phony. We keep that
1697 # information in a variable so we can use it in if_changed and friends.
1698 .PHONY: $(PHONY)