5 NAME
= One Giant Leap for Frogkind
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.
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
19 # Avoid funny character set dependencies
23 export LC_COLLATE LC_NUMERIC
25 # Avoid interference with shell env settings
28 # We are using a recursive build, so we need to do a little thinking
29 # to get the ordering right.
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
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
44 # To put more focus on warnings, be less verbose as default
45 # Use 'make V=1' to see the full commands
47 ifeq ("$(origin V)", "command line")
54 # Call a source code checker (by default, "sparse") as part of the
57 # Use 'make C=1' to enable checking of only re-compiled files.
58 # Use 'make C=2' to enable checking of *all* source files, regardless
59 # of whether they are re-compiled or not.
61 # See the file "Documentation/sparse.txt" for more details, including
62 # where to get the "sparse" utility.
64 ifeq ("$(origin C)", "command line")
65 KBUILD_CHECKSRC
= $(C
)
67 ifndef KBUILD_CHECKSRC
71 # Use make M=dir to specify directory of external module to build
72 # Old syntax make ... SUBDIRS=$PWD is still supported
73 # Setting the environment variable KBUILD_EXTMOD take precedence
75 KBUILD_EXTMOD ?
= $(SUBDIRS
)
78 ifeq ("$(origin M)", "command line")
82 # kbuild supports saving output files in a separate directory.
83 # To locate output files in a separate directory two syntaxes are supported.
84 # In both cases the working directory must be the root of the kernel src.
86 # Use "make O=dir/to/store/output/files/"
88 # 2) Set KBUILD_OUTPUT
89 # Set the environment variable KBUILD_OUTPUT to point to the directory
90 # where the output files shall be placed.
91 # export KBUILD_OUTPUT=dir/to/store/output/files/
94 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
98 # KBUILD_SRC is set on invocation of make in OBJ directory
99 # KBUILD_SRC is not intended to be used by the regular user (for now)
100 ifeq ($(KBUILD_SRC
),)
102 # OK, Make called in directory where kernel src resides
103 # Do we want to locate output files in a separate directory?
104 ifeq ("$(origin O)", "command line")
105 KBUILD_OUTPUT
:= $(O
)
108 ifeq ("$(origin W)", "command line")
109 export KBUILD_ENABLE_EXTRA_GCC_CHECKS
:= $(W
)
112 # That's our default target when none is given on the command line
116 # Cancel implicit rules on top Makefile
117 $(CURDIR
)/Makefile Makefile
: ;
119 ifneq ($(KBUILD_OUTPUT
),)
120 # Invoke a second make in the output directory, passing relevant variables
121 # check that the output directory actually exists
122 saved-output
:= $(KBUILD_OUTPUT
)
123 KBUILD_OUTPUT
:= $(shell cd
$(KBUILD_OUTPUT
) && /bin
/pwd
)
124 $(if
$(KBUILD_OUTPUT
),, \
125 $(error output directory
"$(saved-output)" does not exist
))
127 PHONY
+= $(MAKECMDGOALS
) sub-make
129 $(filter-out _all sub-make
$(CURDIR
)/Makefile
, $(MAKECMDGOALS
)) _all
: sub-make
133 $(if
$(KBUILD_VERBOSE
:1=),@
)$(MAKE
) -C
$(KBUILD_OUTPUT
) \
134 KBUILD_SRC
=$(CURDIR
) \
135 KBUILD_EXTMOD
="$(KBUILD_EXTMOD)" -f
$(CURDIR
)/Makefile \
136 $(filter-out _all sub-make
,$(MAKECMDGOALS
))
138 # Leave processing to above invocation of make
140 endif # ifneq ($(KBUILD_OUTPUT),)
141 endif # ifeq ($(KBUILD_SRC),)
143 # We process the rest of the Makefile if this is the final invocation of make
144 ifeq ($(skip-makefile
),)
146 # If building an external module we do not care about the all: rule
147 # but instead _all depend on modules
149 ifeq ($(KBUILD_EXTMOD
),)
155 srctree
:= $(if
$(KBUILD_SRC
),$(KBUILD_SRC
),$(CURDIR
))
160 VPATH
:= $(srctree
)$(if
$(KBUILD_EXTMOD
),:$(KBUILD_EXTMOD
))
162 export srctree objtree VPATH
165 # SUBARCH tells the usermode build what the underlying arch is. That is set
166 # first, and if a usermode build is happening, the "ARCH=um" on the command
167 # line overrides the setting of ARCH below. If a native build is happening,
168 # then ARCH is assigned, getting whatever value it gets normally, and
169 # SUBARCH is subsequently ignored.
171 SUBARCH
:= $(shell uname
-m | sed
-e s
/i
.86/x86
/ -e s
/x86_64
/x86
/ \
172 -e s
/sun4u
/sparc64
/ \
173 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
174 -e s
/s390x
/s390
/ -e s
/parisc64
/parisc
/ \
175 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
176 -e s
/sh
[234].
*/sh
/ -e s
/aarch64.
*/arm64
/ )
178 # Cross compiling and selecting different set of gcc/bin-utils
179 # ---------------------------------------------------------------------------
181 # When performing cross compilation for other architectures ARCH shall be set
182 # to the target architecture. (See arch/* for the possibilities).
183 # ARCH can be set during invocation of make:
185 # Another way is to have ARCH set in the environment.
186 # The default ARCH is the host where make is executed.
188 # CROSS_COMPILE specify the prefix used for all executables used
189 # during compilation. Only gcc and related bin-utils executables
190 # are prefixed with $(CROSS_COMPILE).
191 # CROSS_COMPILE can be set on the command line
192 # make CROSS_COMPILE=ia64-linux-
193 # Alternatively CROSS_COMPILE can be set in the environment.
194 # A third alternative is to store a setting in .config so that plain
195 # "make" in the configured kernel build directory always uses that.
196 # Default value for CROSS_COMPILE is not to prefix executables
197 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
199 CROSS_COMPILE ?
= $(CONFIG_CROSS_COMPILE
:"%"=%)
201 # Architecture as present in compile.h
202 UTS_MACHINE
:= $(ARCH
)
205 # Additional ARCH settings for x86
209 ifeq ($(ARCH
),x86_64
)
213 # Additional ARCH settings for sparc
214 ifeq ($(ARCH
),sparc32
)
217 ifeq ($(ARCH
),sparc64
)
221 # Additional ARCH settings for sh
226 # Additional ARCH settings for tile
227 ifeq ($(ARCH
),tilepro
)
230 ifeq ($(ARCH
),tilegx
)
234 # Where to locate arch specific headers
235 hdr-arch
:= $(SRCARCH
)
237 KCONFIG_CONFIG ?
= .config
238 export KCONFIG_CONFIG
240 # SHELL used by kbuild
241 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
242 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
243 else echo sh
; fi
; fi
)
247 HOSTCFLAGS
= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2
-fomit-frame-pointer
250 # Decide whether to build built-in, modular, or both.
251 # Normally, just do built-in.
256 # If we have only "make modules", don't compile built-in objects.
257 # When we're building modules with modversions, we need to consider
258 # the built-in objects during the descend as well, in order to
259 # make sure the checksums are up to date before we record them.
261 ifeq ($(MAKECMDGOALS
),modules
)
262 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
265 # If we have "make <whatever> modules", compile modules
266 # in addition to whatever we do anyway.
267 # Just "make" or "make all" shall build modules as well
269 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
273 ifeq ($(MAKECMDGOALS
),)
277 export KBUILD_MODULES KBUILD_BUILTIN
278 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
281 # ---------------------------------------------------------------------------
283 # Normally, we echo the whole command before executing it. By making
284 # that echo $($(quiet)$(cmd)), we now have the possibility to set
285 # $(quiet) to choose other forms of output instead, e.g.
287 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
288 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
290 # If $(quiet) is empty, the whole command will be printed.
291 # If it is set to "quiet_", only the short version will be printed.
292 # If it is set to "silent_", nothing will be printed at all, since
293 # the variable $(silent_cmd_cc_o_c) doesn't exist.
295 # A simple variant is to prefix commands with $(Q) - that's useful
296 # for commands that shall be hidden in non-verbose mode.
300 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
301 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
303 ifeq ($(KBUILD_VERBOSE
),1)
311 # If the user is running make -s (silent mode), suppress echoing of
314 ifneq ($(filter 4.
%,$(MAKE_VERSION
)),) # make-4
315 ifneq ($(filter %s
,$(firstword x
$(MAKEFLAGS
))),)
319 ifneq ($(filter s
% -s
%,$(MAKEFLAGS
)),)
324 export quiet Q KBUILD_VERBOSE
327 # Look for make include files relative to root of kernel src
328 MAKEFLAGS
+= --include-dir
=$(srctree
)
330 # We need some generic definitions (do not try to remake the file).
331 $(srctree
)/scripts
/Kbuild.
include: ;
332 include $(srctree
)/scripts
/Kbuild.
include
334 # Make variables (CC, etc...)
336 AS
= $(CROSS_COMPILE
)as
337 LD
= $(CROSS_COMPILE
)ld
338 CC
= $(CROSS_COMPILE
)gcc
340 AR
= $(CROSS_COMPILE
)ar
341 NM
= $(CROSS_COMPILE
)nm
342 STRIP
= $(CROSS_COMPILE
)strip
343 OBJCOPY
= $(CROSS_COMPILE
)objcopy
344 OBJDUMP
= $(CROSS_COMPILE
)objdump
346 GENKSYMS
= scripts
/genksyms
/genksyms
347 INSTALLKERNEL
:= installkernel
348 DEPMOD
= /sbin
/depmod
352 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
353 -Wbitwise
-Wno-return-void
$(CF
)
359 CFLAGS_GCOV
= -fprofile-arcs
-ftest-coverage
362 # Use USERINCLUDE when you must reference the UAPI directories only.
364 -I
$(srctree
)/arch
/$(hdr-arch
)/include/uapi \
365 -Iarch
/$(hdr-arch
)/include/generated
/uapi \
366 -I
$(srctree
)/include/uapi \
367 -Iinclude
/generated
/uapi \
368 -include $(srctree
)/include/linux
/kconfig.h
370 # Use LINUXINCLUDE when you must reference the include/ directory.
371 # Needed to be compatible with the O= option
373 -I
$(srctree
)/arch
/$(hdr-arch
)/include \
374 -Iarch
/$(hdr-arch
)/include/generated \
375 $(if
$(KBUILD_SRC
), -I
$(srctree
)/include) \
379 KBUILD_CPPFLAGS
:= -D__KERNEL__
381 KBUILD_CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
382 -fno-strict-aliasing
-fno-common \
383 -Werror-implicit-function-declaration \
384 -Wno-format-security \
385 -fno-delete-null-pointer-checks
386 KBUILD_AFLAGS_KERNEL
:=
387 KBUILD_CFLAGS_KERNEL
:=
388 KBUILD_AFLAGS
:= -D__ASSEMBLY__
389 KBUILD_AFLAGS_MODULE
:= -DMODULE
390 KBUILD_CFLAGS_MODULE
:= -DMODULE
391 KBUILD_LDFLAGS_MODULE
:= -T
$(srctree
)/scripts
/module-common.lds
393 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
394 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
395 KERNELVERSION
= $(VERSION
)$(if
$(PATCHLEVEL
),.
$(PATCHLEVEL
)$(if
$(SUBLEVEL
),.
$(SUBLEVEL
)))$(EXTRAVERSION
)
397 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
398 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
399 export CPP AR NM STRIP OBJCOPY OBJDUMP
400 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
401 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
403 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
404 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
405 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
406 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
407 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
408 export KBUILD_ARFLAGS
410 # When compiling out-of-tree modules, put MODVERDIR in the module
411 # tree rather than in the kernel tree. The kernel tree might
413 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
415 # Files to ignore in find ... statements
417 RCS_FIND_IGNORE
:= \
( -name SCCS
-o
-name BitKeeper
-o
-name .svn
-o
-name CVS \
418 -o
-name .
pc -o
-name .hg
-o
-name .git \
) -prune
-o
419 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn \
420 --exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
422 # ===========================================================================
423 # Rules shared between *config targets and build targets
425 # Basic helpers built in scripts/
426 PHONY
+= scripts_basic
428 $(Q
)$(MAKE
) $(build
)=scripts
/basic
429 $(Q
)rm -f .tmp_quiet_recordmcount
431 # To avoid any implicit rule to kick in, define an empty command.
432 scripts
/basic
/%: scripts_basic
;
434 PHONY
+= outputmakefile
435 # outputmakefile generates a Makefile in the output directory, if using a
436 # separate output directory. This allows convenient use of make in the
439 ifneq ($(KBUILD_SRC
),)
440 $(Q
)ln
-fsn
$(srctree
) source
441 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
442 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
445 # Support for using generic headers in asm-generic
448 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.asm-generic \
449 src
=asm obj
=arch
/$(SRCARCH
)/include/generated
/asm
450 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.asm-generic \
451 src
=uapi
/asm obj
=arch
/$(SRCARCH
)/include/generated
/uapi
/asm
453 # To make sure we do not include .config for any of the *config targets
454 # catch them early, and hand them over to scripts/kconfig/Makefile
455 # It is allowed to specify more targets when calling make, including
456 # mixing *config targets and build targets.
457 # For example 'make oldconfig all'.
458 # Detect when mixed targets is specified, and make a second invocation
459 # of make so .config is not included in this case either (for *config).
461 version_h
:= include/generated
/uapi
/linux
/version.h
463 no-dot-config-targets
:= clean mrproper
distclean \
464 cscope gtags TAGS
tags help
%docs
check% coccicheck \
465 $(version_h
) headers_
% archheaders archscripts \
466 kernelversion
%src-pkg
472 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
473 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
478 ifeq ($(KBUILD_EXTMOD
),)
479 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
481 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
487 ifeq ($(mixed-targets
),1)
488 # ===========================================================================
489 # We're called with mixed targets (*config and build targets).
490 # Handle them one by one.
493 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
496 ifeq ($(config-targets
),1)
497 # ===========================================================================
498 # *config targets only - make sure prerequisites are updated, and descend
499 # in scripts/kconfig to make the *config target
501 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
502 # KBUILD_DEFCONFIG may point out an alternative default configuration
503 # used for 'make defconfig'
504 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
505 export KBUILD_DEFCONFIG KBUILD_KCONFIG
507 config
: scripts_basic outputmakefile FORCE
508 $(Q
)mkdir
-p
include/linux
include/config
509 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
511 %config
: scripts_basic outputmakefile FORCE
512 $(Q
)mkdir
-p
include/linux
include/config
513 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
516 # ===========================================================================
517 # Build targets only - this includes vmlinux, arch specific targets, clean
518 # targets and others. In general all targets except *config targets.
520 ifeq ($(KBUILD_EXTMOD
),)
521 # Additional helpers built in scripts/
522 # Carefully list dependencies so we do not try to build scripts twice
525 scripts
: scripts_basic
include/config
/auto.conf
include/config
/tristate.conf \
527 $(Q
)$(MAKE
) $(build
)=$(@
)
529 # Objects we will link into vmlinux / subdirs we need to visit
531 drivers-y
:= drivers
/ sound
/ firmware
/
535 endif # KBUILD_EXTMOD
537 ifeq ($(dot-config
),1)
539 -include include/config
/auto.conf
541 ifeq ($(KBUILD_EXTMOD
),)
542 # Read in dependencies to all Kconfig* files, make sure to run
543 # oldconfig if changes are detected.
544 -include include/config
/auto.conf.cmd
546 # To avoid any implicit rule to kick in, define an empty command
547 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
549 # If .config is newer than include/config/auto.conf, someone tinkered
550 # with it and forgot to run make oldconfig.
551 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
552 # we execute the config step to be sure to catch updated Kconfig files
553 include/config
/%.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
554 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
556 # external modules needs include/generated/autoconf.h and include/config/auto.conf
557 # but do not care if they are up-to-date. Use auto.conf to trigger the test
558 PHONY
+= include/config
/auto.conf
560 include/config
/auto.conf
:
561 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
563 echo
>&2 " ERROR: Kernel configuration is invalid."; \
564 echo
>&2 " include/generated/autoconf.h or $@ are missing.";\
565 echo
>&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
569 endif # KBUILD_EXTMOD
572 # Dummy target needed, because used as prerequisite
573 include/config
/auto.conf
: ;
574 endif # $(dot-config)
576 # The all: target is the default when no target is given on the
578 # This allow a user to issue only 'make' to build a kernel including modules
579 # Defaults to vmlinux, but the arch makefile usually adds further targets
582 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
583 KBUILD_CFLAGS
+= -Os
$(call cc-disable-warning
,maybe-uninitialized
,)
588 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
590 ifdef CONFIG_READABLE_ASM
591 # Disable optimizations that make assembler listings hard to read.
592 # reorder blocks reorders the control in the function
593 # ipa clone creates specialized cloned functions
594 # partial inlining inlines only parts of functions
595 KBUILD_CFLAGS
+= $(call cc-option
,-fno-reorder-blocks
,) \
596 $(call cc-option
,-fno-ipa-cp-clone
,) \
597 $(call cc-option
,-fno-partial-inlining
)
600 ifneq ($(CONFIG_FRAME_WARN
),0)
601 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
604 # Force gcc to behave correct even for buggy distributions
605 ifndef CONFIG_CC_STACKPROTECTOR
606 KBUILD_CFLAGS
+= $(call cc-option
, -fno-stack-protector
)
609 # This warning generated too much noise in a regular build.
610 # Use make W=1 to enable this warning (see scripts/Makefile.build)
611 KBUILD_CFLAGS
+= $(call cc-disable-warning
, unused-but-set-variable
)
613 ifdef CONFIG_FRAME_POINTER
614 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
616 # Some targets (ARM with Thumb2, for example), can't be built with frame
617 # pointers. For those, we don't have FUNCTION_TRACER automatically
618 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
619 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
620 # -fomit-frame-pointer with FUNCTION_TRACER.
621 ifndef CONFIG_FUNCTION_TRACER
622 KBUILD_CFLAGS
+= -fomit-frame-pointer
626 ifdef CONFIG_DEBUG_INFO
628 KBUILD_AFLAGS
+= -gdwarf-2
631 ifdef CONFIG_DEBUG_INFO_REDUCED
632 KBUILD_CFLAGS
+= $(call cc-option
, -femit-struct-debug-baseonly
) \
633 $(call cc-option
,-fno-var-tracking
)
636 ifdef CONFIG_FUNCTION_TRACER
637 ifdef CONFIG_HAVE_FENTRY
638 CC_USING_FENTRY
:= $(call cc-option
, -mfentry
-DCC_USING_FENTRY
)
640 KBUILD_CFLAGS
+= -pg
$(CC_USING_FENTRY
)
641 KBUILD_AFLAGS
+= $(CC_USING_FENTRY
)
642 ifdef CONFIG_DYNAMIC_FTRACE
643 ifdef CONFIG_HAVE_C_RECORDMCOUNT
644 BUILD_C_RECORDMCOUNT
:= y
645 export BUILD_C_RECORDMCOUNT
650 # We trigger additional mismatches with less inlining
651 ifdef CONFIG_DEBUG_SECTION_MISMATCH
652 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
655 # arch Makefile may override CC so keep this after arch Makefile is included
656 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
657 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
659 # warn about C99 declaration after statement
660 KBUILD_CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
662 # disable pointer signed / unsigned warnings in gcc 4.0
663 KBUILD_CFLAGS
+= $(call cc-disable-warning
, pointer-sign
)
665 # disable invalid "can't wrap" optimizations for signed / pointers
666 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
668 # conserve stack if available
669 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
671 # disallow errors like 'EXPORT_GPL(foo);' with missing header
672 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=implicit-int
)
674 # require functions to have arguments in prototypes, not empty 'int foo()'
675 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=strict-prototypes
)
677 # use the deterministic mode of AR if available
678 KBUILD_ARFLAGS
:= $(call ar-option
,D
)
680 # check for 'asm goto'
681 ifeq ($(shell $(CONFIG_SHELL
) $(srctree
)/scripts
/gcc-goto.sh
$(CC
)), y
)
682 KBUILD_CFLAGS
+= -DCC_HAVE_ASM_GOTO
685 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
686 KBUILD_CPPFLAGS
+= $(KCPPFLAGS
)
687 KBUILD_AFLAGS
+= $(KAFLAGS
)
688 KBUILD_CFLAGS
+= $(KCFLAGS
)
690 # Use --build-id when available.
691 LDFLAGS_BUILD_ID
= $(patsubst -Wl
$(comma
)%,%,\
692 $(call cc-ldoption
, -Wl
$(comma
)--build-id
,))
693 KBUILD_LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
694 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
696 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
697 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
700 # Default kernel image to build when no specific target is given.
701 # KBUILD_IMAGE may be overruled on the command line or
702 # set in the environment
703 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
705 export KBUILD_IMAGE ?
= vmlinux
708 # INSTALL_PATH specifies where to place the updated kernel and system map
709 # images. Default is /boot, but you can set it to other values
710 export INSTALL_PATH ?
= /boot
713 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
714 # relocations required by build roots. This is not defined in the
715 # makefile but the argument can be passed to make if needed.
718 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
722 # INSTALL_MOD_STRIP, if defined, will cause modules to be
723 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
724 # the default option --strip-debug will be used. Otherwise,
725 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
727 ifdef INSTALL_MOD_STRIP
728 ifeq ($(INSTALL_MOD_STRIP
),1)
729 mod_strip_cmd
= $(STRIP
) --strip-debug
731 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
732 endif # INSTALL_MOD_STRIP=1
735 endif # INSTALL_MOD_STRIP
738 # Select initial ramdisk compression format, default is gzip(1).
739 # This shall be used by the dracut(8) tool while creating an initramfs image.
742 ifeq ($(CONFIG_RD_BZIP2
), y
)
743 INITRD_COMPRESS
=bzip2
744 else ifeq ($(CONFIG_RD_LZMA
), y
)
746 else ifeq ($(CONFIG_RD_XZ
), y
)
748 else ifeq ($(CONFIG_RD_LZO
), y
)
750 else ifeq ($(CONFIG_RD_LZ4
), y
)
753 export INITRD_COMPRESS
755 ifdef CONFIG_MODULE_SIG_ALL
756 MODSECKEY
= .
/signing_key.priv
757 MODPUBKEY
= .
/signing_key.x509
759 mod_sign_cmd
= perl
$(srctree
)/scripts
/sign-file
$(CONFIG_MODULE_SIG_HASH
) $(MODSECKEY
) $(MODPUBKEY
)
766 ifeq ($(KBUILD_EXTMOD
),)
767 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
769 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
770 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
771 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
773 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
775 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
776 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
778 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
779 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
780 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
781 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
782 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
783 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
784 libs-y
:= $(libs-y1
) $(libs-y2
)
786 # Externally visible symbols (used by link-vmlinux.sh)
787 export KBUILD_VMLINUX_INIT
:= $(head-y
) $(init-y
)
788 export KBUILD_VMLINUX_MAIN
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
789 export KBUILD_LDS
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
790 export LDFLAGS_vmlinux
791 # used by scripts/pacmage/Makefile
792 export KBUILD_ALLDIRS
:= $(sort $(filter-out arch
/%,$(vmlinux-alldirs
)) arch Documentation
include samples scripts tools virt
)
794 vmlinux-deps
:= $(KBUILD_LDS
) $(KBUILD_VMLINUX_INIT
) $(KBUILD_VMLINUX_MAIN
)
796 # Final link of vmlinux
797 cmd_link-vmlinux
= $(CONFIG_SHELL
) $< $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
)
798 quiet_cmd_link-vmlinux
= LINK
$@
800 # Include targets which we want to
801 # execute if the rest of the kernel build went well.
802 vmlinux
: scripts
/link-vmlinux.sh
$(vmlinux-deps
) FORCE
803 ifdef CONFIG_HEADERS_CHECK
804 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
807 $(Q
)$(MAKE
) $(build
)=samples
809 ifdef CONFIG_BUILD_DOCSRC
810 $(Q
)$(MAKE
) $(build
)=Documentation
812 +$(call if_changed
,link-vmlinux
)
814 # The actual objects are generated when descending,
815 # make sure no implicit rule kicks in
816 $(sort $(vmlinux-deps
)): $(vmlinux-dirs
) ;
818 # Handle descending into subdirectories listed in $(vmlinux-dirs)
819 # Preset locale variables to speed up the build process. Limit locale
820 # tweaks to this spot to avoid wrong language settings when running
821 # make menuconfig etc.
822 # Error messages still appears in the original language
824 PHONY
+= $(vmlinux-dirs
)
825 $(vmlinux-dirs
): prepare scripts
826 $(Q
)$(MAKE
) $(build
)=$@
828 define filechk_kernel.release
829 echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
832 # Store (new) KERNELRELEASE string in include/config/kernel.release
833 include/config
/kernel.release
: include/config
/auto.conf FORCE
834 $(call filechk
,kernel.release
)
837 # Things we need to do before we recursively start building the kernel
838 # or the modules are listed in "prepare".
839 # A multi level approach is used. prepareN is processed before prepareN-1.
840 # archprepare is used in arch Makefiles and when processed asm symlink,
841 # version.h and scripts_basic is processed / created.
843 # Listed in dependency order
844 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
846 # prepare3 is used to check if we are building in a separate output directory,
848 # 1) Check that make has not been executed in the kernel src $(srctree)
849 prepare3
: include/config
/kernel.release
850 ifneq ($(KBUILD_SRC
),)
851 @
$(kecho
) ' Using $(srctree) as source for kernel'
852 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
853 echo
>&2 " $(srctree) is not clean, please run 'make mrproper'"; \
854 echo
>&2 " in the '$(srctree)' directory.";\
859 # prepare2 creates a makefile if using a separate output directory
860 prepare2
: prepare3 outputmakefile asm-generic
862 prepare1
: prepare2
$(version_h
) include/generated
/utsrelease.h \
863 include/config
/auto.conf
866 archprepare
: archheaders archscripts prepare1 scripts_basic
868 prepare0
: archprepare FORCE
869 $(Q
)$(MAKE
) $(build
)=.
871 # All the preparing..
874 # Generate some files
875 # ---------------------------------------------------------------------------
877 # KERNELRELEASE can change from a few different places, meaning version.h
878 # needs to be updated, so this check is forced on all builds
881 define filechk_utsrelease.h
882 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
883 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
886 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
889 define filechk_version.h
890 (echo \
#define LINUX_VERSION_CODE $(shell \
891 expr
$(VERSION
) \
* 65536 + 0$(PATCHLEVEL
) \
* 256 + 0$(SUBLEVEL
)); \
892 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
895 $(version_h
): $(srctree
)/Makefile FORCE
896 $(call filechk
,version.h
)
898 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
899 $(call filechk
,utsrelease.h
)
903 $(Q
)find
$(srctree
)/include/ -name
'*.h' | xargs
--max-args
1 \
904 $(srctree
)/scripts
/headerdep.pl
-I
$(srctree
)/include
906 # ---------------------------------------------------------------------------
910 @echo
'*** Warning: make $@ is unnecessary now.'
912 # ---------------------------------------------------------------------------
914 INSTALL_FW_PATH
=$(INSTALL_MOD_PATH
)/lib
/firmware
915 export INSTALL_FW_PATH
917 PHONY
+= firmware_install
918 firmware_install
: FORCE
919 @mkdir
-p
$(objtree
)/firmware
920 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_install
922 # ---------------------------------------------------------------------------
925 #Default location for installed headers
926 export INSTALL_HDR_PATH
= $(objtree
)/usr
928 hdr-inst
:= -rR
-f
$(srctree
)/scripts
/Makefile.headersinst obj
930 # If we do an all arch process set dst to asm-$(hdr-arch)
931 hdr-dst
= $(if
$(KBUILD_HEADERS
), dst
=include/asm-
$(hdr-arch
), dst
=include/asm
)
940 __headers
: $(version_h
) scripts_basic asm-generic archheaders archscripts FORCE
941 $(Q
)$(MAKE
) $(build
)=scripts build_unifdef
943 PHONY
+= headers_install_all
945 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
install
947 PHONY
+= headers_install
948 headers_install
: __headers
949 $(if
$(wildcard $(srctree
)/arch
/$(hdr-arch
)/include/uapi
/asm
/Kbuild
),, \
950 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
951 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi
952 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/uapi
/asm
$(hdr-dst
)
954 PHONY
+= headers_check_all
955 headers_check_all
: headers_install_all
956 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
check
958 PHONY
+= headers_check
959 headers_check
: headers_install
960 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi HDRCHECK
=1
961 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/uapi
/asm
$(hdr-dst
) HDRCHECK
=1
963 # ---------------------------------------------------------------------------
968 # By default, build modules as well
974 # A module can be listed more than once in obj-m resulting in
975 # duplicate lines in modules.order files. Those are removed
976 # using awk while concatenating to the final file.
979 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
) modules.builtin
980 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.order
) > $(objtree
)/modules.order
981 @
$(kecho
) ' Building modules, stage 2.';
982 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
983 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modbuild
985 modules.builtin
: $(vmlinux-dirs
:%=%/modules.builtin
)
986 $(Q
)$(AWK
) '!x[$$0]++' $^
> $(objtree
)/modules.builtin
988 %/modules.builtin
: include/config
/auto.conf
989 $(Q
)$(MAKE
) $(modbuiltin
)=$*
992 # Target to prepare building external modules
993 PHONY
+= modules_prepare
994 modules_prepare
: prepare scripts
996 # Target to install modules
997 PHONY
+= modules_install
998 modules_install
: _modinst_ _modinst_post
1002 @
rm -rf
$(MODLIB
)/kernel
1003 @
rm -f
$(MODLIB
)/source
1004 @mkdir
-p
$(MODLIB
)/kernel
1005 @ln
-s
$(srctree
) $(MODLIB
)/source
1006 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1007 rm -f
$(MODLIB
)/build
; \
1008 ln
-s
$(objtree
) $(MODLIB
)/build
; \
1010 @cp
-f
$(objtree
)/modules.order
$(MODLIB
)/
1011 @cp
-f
$(objtree
)/modules.builtin
$(MODLIB
)/
1012 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1014 # This depmod is only for convenience to give the initial
1015 # boot a modules.dep even before / is mounted read-write. However the
1016 # boot script depmod is the master version.
1017 PHONY
+= _modinst_post
1018 _modinst_post
: _modinst_
1019 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modinst
1022 ifeq ($(CONFIG_MODULE_SIG
), y
)
1023 PHONY
+= modules_sign
1025 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modsign
1028 else # CONFIG_MODULES
1030 # Modules not configured
1031 # ---------------------------------------------------------------------------
1033 modules modules_install
: FORCE
1035 @echo
>&2 "The present kernel configuration has modules disabled."
1036 @echo
>&2 "Type 'make config' and enable loadable module support."
1037 @echo
>&2 "Then build a kernel with module support enabled."
1041 endif # CONFIG_MODULES
1044 # Cleaning is done on three levels.
1045 # make clean Delete most generated files
1046 # Leave enough to build external modules
1047 # make mrproper Delete the current configuration, and all generated files
1048 # make distclean Remove editor backup files, patch leftover files and the like
1050 # Directories & files removed with 'make clean'
1051 CLEAN_DIRS
+= $(MODVERDIR
)
1053 # Directories & files removed with 'make mrproper'
1054 MRPROPER_DIRS
+= include/config usr
/include include/generated \
1055 arch
/*/include/generated
1056 MRPROPER_FILES
+= .config .config.old .version .old_version
$(version_h
) \
1057 Module.symvers
tags TAGS cscope
* GPATH GTAGS GRTAGS GSYMS \
1058 signing_key.priv signing_key.x509 x509.genkey \
1059 extra_certificates signing_key.x509.keyid \
1060 signing_key.x509.signer
1062 # clean - Delete most, but leave enough to build external modules
1064 clean: rm-dirs
:= $(CLEAN_DIRS
)
1065 clean: rm-files
:= $(CLEAN_FILES
)
1066 clean-dirs
:= $(addprefix _clean_
, .
$(vmlinux-alldirs
) Documentation samples
)
1068 PHONY
+= $(clean-dirs
) clean archclean vmlinuxclean
1070 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1073 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/link-vmlinux.sh
clean
1075 clean: archclean vmlinuxclean
1077 # mrproper - Delete all generated files, including .config
1079 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1080 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1081 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
1083 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1085 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1087 mrproper
: clean archmrproper
$(mrproper-dirs
)
1096 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1097 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1098 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1100 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
1101 -type f
-print | xargs
rm -f
1104 # Packaging of the kernel to various formats
1105 # ---------------------------------------------------------------------------
1106 # rpm target kept for backward compatibility
1107 package-dir
:= $(srctree
)/scripts
/package
1110 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1111 %pkg
: include/config
/kernel.release FORCE
1112 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1113 rpm
: include/config
/kernel.release FORCE
1114 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1117 # Brief documentation of the typical targets used
1118 # ---------------------------------------------------------------------------
1120 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1121 boards
:= $(notdir $(boards
))
1122 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1123 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1126 @echo
'Cleaning targets:'
1127 @echo
' clean - Remove most generated files but keep the config and'
1128 @echo
' enough build support to build external modules'
1129 @echo
' mrproper - Remove all generated files + config + various backup files'
1130 @echo
' distclean - mrproper + remove editor backup and patch files'
1132 @echo
'Configuration targets:'
1133 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1135 @echo
'Other generic targets:'
1136 @echo
' all - Build all targets marked with [*]'
1137 @echo
'* vmlinux - Build the bare kernel'
1138 @echo
'* modules - Build all modules'
1139 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1140 @echo
' firmware_install- Install all firmware to INSTALL_FW_PATH'
1141 @echo
' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1142 @echo
' dir/ - Build all files in dir and below'
1143 @echo
' dir/file.[oisS] - Build specified target only'
1144 @echo
' dir/file.lst - Build specified mixed source/assembly target only'
1145 @echo
' (requires a recent binutils and recent build (System.map))'
1146 @echo
' dir/file.ko - Build module including final link'
1147 @echo
' modules_prepare - Set up for building external modules'
1148 @echo
' tags/TAGS - Generate tags file for editors'
1149 @echo
' cscope - Generate cscope index'
1150 @echo
' gtags - Generate GNU GLOBAL index'
1151 @echo
' kernelrelease - Output the release version string'
1152 @echo
' kernelversion - Output the version stored in Makefile'
1153 @echo
' image_name - Output the image name'
1154 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1155 echo
' (default: $(INSTALL_HDR_PATH))'; \
1157 @echo
'Static analysers'
1158 @echo
' checkstack - Generate a list of stack hogs'
1159 @echo
' namespacecheck - Name space analysis on compiled kernel'
1160 @echo
' versioncheck - Sanity check on version.h usage'
1161 @echo
' includecheck - Check for duplicate included header files'
1162 @echo
' export_report - List the usages of all exported symbols'
1163 @echo
' headers_check - Sanity check on exported headers'
1164 @echo
' headerdep - Detect inclusion cycles in headers'
1165 @
$(MAKE
) -f
$(srctree
)/scripts
/Makefile.help checker-help
1167 @echo
'Kernel packaging:'
1168 @
$(MAKE
) $(build
)=$(package-dir
) help
1170 @echo
'Documentation targets:'
1171 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1173 @echo
'Architecture specific targets ($(SRCARCH)):'
1174 @
$(if
$(archhelp
),$(archhelp
),\
1175 echo
' No architecture specific help defined for $(SRCARCH)')
1178 $(foreach b
, $(boards
), \
1179 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1181 @
$(if
$(board-dirs
), \
1182 $(foreach b
, $(board-dirs
), \
1183 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1184 printf
" %-16s - Show all of the above\\n" help-boards
; \
1187 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1188 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1189 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1190 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1191 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1192 @echo
' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1193 @echo
' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1194 @echo
' 1: warnings which may be relevant and do not occur too often'
1195 @echo
' 2: warnings which occur quite often but may still be relevant'
1196 @echo
' 3: more obscure warnings, can most likely be ignored'
1197 @echo
' Multiple levels can be combined with W=12 or W=123'
1199 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1200 @echo
'For further info see the ./README file'
1203 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1205 help-boards
: $(help-board-dirs
)
1207 boards-per-dir
= $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
))
1209 $(help-board-dirs
): help-
%:
1210 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1211 @
$(if
$(boards-per-dir
), \
1212 $(foreach b
, $(boards-per-dir
), \
1213 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1217 # Documentation targets
1218 # ---------------------------------------------------------------------------
1219 %docs
: scripts_basic FORCE
1220 $(Q
)$(MAKE
) $(build
)=scripts build_docproc
1221 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1223 else # KBUILD_EXTMOD
1226 # External module support.
1227 # When building external modules the kernel used as basis is considered
1228 # read-only, and no consistency checks are made and the make
1229 # system is not used on the basis kernel. If updates are required
1230 # in the basis kernel ordinary make commands (without M=...) must
1233 # The following are the only valid targets when building external
1235 # make M=dir clean Delete all automatically generated files
1236 # make M=dir modules Make all modules in specified dir
1237 # make M=dir Same as 'make M=dir modules'
1238 # make M=dir modules_install
1239 # Install the modules built in the module directory
1240 # Assumes install directory is already created
1242 # We are always building modules
1244 PHONY
+= crmodverdir
1248 PHONY
+= $(objtree
)/Module.symvers
1249 $(objtree
)/Module.symvers
:
1250 @
test -e
$(objtree
)/Module.symvers ||
( \
1252 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1253 echo
" is missing; modules will have no dependencies and modversions."; \
1256 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1257 PHONY
+= $(module-dirs
) modules
1258 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1259 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1261 modules
: $(module-dirs
)
1262 @
$(kecho
) ' Building modules, stage 2.';
1263 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1265 PHONY
+= modules_install
1266 modules_install
: _emodinst_ _emodinst_post
1268 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1271 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1272 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1274 PHONY
+= _emodinst_post
1275 _emodinst_post
: _emodinst_
1278 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1280 PHONY
+= $(clean-dirs
) clean
1282 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1284 clean: rm-dirs
:= $(MODVERDIR
)
1285 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers
1288 @echo
' Building external modules.'
1289 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1291 @echo
' modules - default target, build the module(s)'
1292 @echo
' modules_install - install the module'
1293 @echo
' clean - remove generated files in module directory only'
1297 PHONY
+= prepare scripts
1300 endif # KBUILD_EXTMOD
1302 clean: $(clean-dirs
)
1305 @find
$(if
$(KBUILD_EXTMOD
), $(KBUILD_EXTMOD
), .
) $(RCS_FIND_IGNORE
) \
1306 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1308 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1309 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1310 -o
-name modules.builtin
-o
-name
'.tmp_*.o.*' \
1311 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1313 # Generate tags for editors
1314 # ---------------------------------------------------------------------------
1315 quiet_cmd_tags
= GEN
$@
1316 cmd_tags
= $(CONFIG_SHELL
) $(srctree
)/scripts
/tags.sh
$@
1318 tags TAGS cscope gtags
: FORCE
1321 # Scripts to check various things for consistency
1322 # ---------------------------------------------------------------------------
1324 PHONY
+= includecheck versioncheck coccicheck namespacecheck export_report
1327 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1328 -name
'*.[hcS]' -type f
-print |
sort \
1329 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1332 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1333 -name
'*.[hcS]' -type f
-print |
sort \
1334 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1337 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/$@
1340 $(PERL
) $(srctree
)/scripts
/namespace.pl
1343 $(PERL
) $(srctree
)/scripts
/export_report.pl
1345 endif #ifeq ($(config-targets),1)
1346 endif #ifeq ($(mixed-targets),1)
1348 PHONY
+= checkstack kernelrelease kernelversion image_name
1350 # UML needs a little special treatment here. It wants to use the host
1351 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1352 # else wants $(ARCH), including people doing cross-builds, which means
1353 # that $(SUBARCH) doesn't work here.
1355 CHECKSTACK_ARCH
:= $(SUBARCH
)
1357 CHECKSTACK_ARCH
:= $(ARCH
)
1360 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1361 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1364 @echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1367 @echo
$(KERNELVERSION
)
1370 @echo
$(KBUILD_IMAGE
)
1372 # Clear a bunch of variables before executing the submake
1374 $(Q
)mkdir
-p
$(objtree
)/tools
1375 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(filter --j% -j,$(MAKEFLAGS))" O
=$(objtree
) subdir
=tools
-C
$(src
)/tools
/
1378 $(Q
)mkdir
-p
$(objtree
)/tools
1379 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(filter --j% -j,$(MAKEFLAGS))" O
=$(objtree
) subdir
=tools
-C
$(src
)/tools
/ $*
1382 # ---------------------------------------------------------------------------
1383 # Single targets are compatible with:
1384 # - build with mixed source and output
1385 # - build with separate output dir 'make O=...'
1386 # - external modules
1388 # target-dir => where to store outputfile
1389 # build-dir => directory in kernel source tree to use
1391 ifeq ($(KBUILD_EXTMOD
),)
1392 build-dir
= $(patsubst %/,%,$(dir $@
))
1393 target-dir
= $(dir $@
)
1395 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1396 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1397 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1400 %.s
: %.c prepare scripts FORCE
1401 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1402 %.i
: %.c prepare scripts FORCE
1403 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1404 %.o
: %.c prepare scripts FORCE
1405 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1406 %.lst
: %.c prepare scripts FORCE
1407 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1408 %.s
: %.S prepare scripts FORCE
1409 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1410 %.o
: %.S prepare scripts FORCE
1411 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1412 %.symtypes
: %.c prepare scripts FORCE
1413 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1416 /: prepare scripts FORCE
1418 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1419 $(build
)=$(build-dir
)
1420 %/: prepare scripts FORCE
1422 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1423 $(build
)=$(build-dir
)
1424 %.ko
: prepare scripts FORCE
1426 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1427 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1428 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1430 # FIXME Should go into a make.lib or something
1431 # ===========================================================================
1433 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1434 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1436 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1437 cmd_rmfiles
= rm -f
$(rm-files
)
1439 # Run depmod only if we have System.map and depmod is executable
1440 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1441 cmd_depmod
= $(CONFIG_SHELL
) $(srctree
)/scripts
/depmod.sh
$(DEPMOD
) \
1442 $(KERNELRELEASE
) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1444 # Create temporary dir for module support files
1445 # clean it up only when building all modules
1446 cmd_crmodverdir
= $(Q
)mkdir
-p
$(MODVERDIR
) \
1447 $(if
$(KBUILD_MODULES
),; rm -f
$(MODVERDIR
)/*)
1449 # read all saved command lines
1451 targets
:= $(wildcard $(sort $(targets
)))
1452 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1454 ifneq ($(cmd_files
),)
1455 $(cmd_files
): ; # Do not try to update included dependency files
1456 include $(cmd_files
)
1459 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1461 # $(Q)$(MAKE) $(clean)=dir
1462 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1464 endif # skip-makefile
1469 # Declare the contents of the .PHONY variable as phony. We keep that
1470 # information in a variable so we can use it in if_changed and friends.