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
22 export LC_COLLATE LC_NUMERIC
24 # Avoid interference with shell env settings
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
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
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 $(Q) - that's useful
59 # for commands that shall be hidden in non-verbose mode.
63 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
64 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
66 # To put more focus on warnings, be less verbose as default
67 # Use 'make V=1' to see the full commands
69 ifeq ("$(origin V)", "command line")
76 ifeq ($(KBUILD_VERBOSE
),1)
84 # If the user is running make -s (silent mode), suppress echoing of
87 ifneq ($(findstring s
,$(filter-out --%,$(MAKEFLAGS
))),)
92 export quiet Q KBUILD_VERBOSE
94 # kbuild supports saving output files in a separate directory.
95 # To locate output files in a separate directory two syntaxes are supported.
96 # In both cases the working directory must be the root of the kernel src.
98 # Use "make O=dir/to/store/output/files/"
100 # 2) Set KBUILD_OUTPUT
101 # Set the environment variable KBUILD_OUTPUT to point to the directory
102 # where the output files shall be placed.
103 # export KBUILD_OUTPUT=dir/to/store/output/files/
106 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
109 # KBUILD_SRC is not intended to be used by the regular user (for now),
110 # it is set on invocation of make with KBUILD_OUTPUT or O= specified.
111 ifeq ($(KBUILD_SRC
),)
113 # OK, Make called in directory where kernel src resides
114 # Do we want to locate output files in a separate directory?
115 ifeq ("$(origin O)", "command line")
116 KBUILD_OUTPUT
:= $(O
)
119 # That's our default target when none is given on the command line
123 # Cancel implicit rules on top Makefile
124 $(CURDIR
)/Makefile Makefile
: ;
126 ifneq ($(words $(subst :, ,$(CURDIR
))), 1)
127 $(error main directory cannot contain spaces nor colons
)
130 ifneq ($(KBUILD_OUTPUT
),)
131 # check that the output directory actually exists
132 saved-output
:= $(KBUILD_OUTPUT
)
133 KBUILD_OUTPUT
:= $(shell mkdir
-p
$(KBUILD_OUTPUT
) && cd
$(KBUILD_OUTPUT
) \
135 $(if
$(KBUILD_OUTPUT
),, \
136 $(error failed to create output directory
"$(saved-output)"))
138 PHONY
+= $(MAKECMDGOALS
) sub-make
140 $(filter-out _all sub-make
$(CURDIR
)/Makefile
, $(MAKECMDGOALS
)) _all
: sub-make
143 # Invoke a second make in the output directory, passing relevant variables
145 $(Q
)$(MAKE
) -C
$(KBUILD_OUTPUT
) KBUILD_SRC
=$(CURDIR
) \
146 -f
$(CURDIR
)/Makefile
$(filter-out _all sub-make
,$(MAKECMDGOALS
))
148 # Leave processing to above invocation of make
150 endif # ifneq ($(KBUILD_OUTPUT),)
151 endif # ifeq ($(KBUILD_SRC),)
153 # We process the rest of the Makefile if this is the final invocation of make
154 ifeq ($(skip-makefile
),)
156 # Do not print "Entering directory ...",
157 # but we want to display it when entering to the output directory
158 # so that IDEs/editors are able to understand relative filenames.
159 MAKEFLAGS
+= --no-print-directory
161 # Call a source code checker (by default, "sparse") as part of the
164 # Use 'make C=1' to enable checking of only re-compiled files.
165 # Use 'make C=2' to enable checking of *all* source files, regardless
166 # of whether they are re-compiled or not.
168 # See the file "Documentation/dev-tools/sparse.rst" for more details,
169 # including where to get the "sparse" utility.
171 ifeq ("$(origin C)", "command line")
172 KBUILD_CHECKSRC
= $(C
)
174 ifndef KBUILD_CHECKSRC
178 # Call message checker as part of the C compilation
180 # Use 'make D=1' to enable checking
181 # Use 'make D=2' to create the message catalog
184 ifeq ("$(origin D)", "command line")
185 KBUILD_KMSG_CHECK
= $(D
)
188 ifndef KBUILD_KMSG_CHECK
189 KBUILD_KMSG_CHECK
= 0
192 # Use make M=dir to specify directory of external module to build
193 # Old syntax make ... SUBDIRS=$PWD is still supported
194 # Setting the environment variable KBUILD_EXTMOD take precedence
196 KBUILD_EXTMOD ?
= $(SUBDIRS
)
199 ifeq ("$(origin M)", "command line")
200 KBUILD_EXTMOD
:= $(M
)
203 # If building an external module we do not care about the all: rule
204 # but instead _all depend on modules
206 ifeq ($(KBUILD_EXTMOD
),)
212 ifeq ($(KBUILD_SRC
),)
213 # building in the source tree
216 ifeq ($(KBUILD_SRC
)/,$(dir $(CURDIR
)))
217 # building in a subdirectory of the source tree
220 srctree
:= $(KBUILD_SRC
)
227 VPATH
:= $(srctree
)$(if
$(KBUILD_EXTMOD
),:$(KBUILD_EXTMOD
))
229 export srctree objtree VPATH
231 # SUBARCH tells the usermode build what the underlying arch is. That is set
232 # first, and if a usermode build is happening, the "ARCH=um" on the command
233 # line overrides the setting of ARCH below. If a native build is happening,
234 # then ARCH is assigned, getting whatever value it gets normally, and
235 # SUBARCH is subsequently ignored.
237 SUBARCH
:= $(shell uname
-m | sed
-e s
/i
.86/x86
/ -e s
/x86_64
/x86
/ \
238 -e s
/sun4u
/sparc64
/ \
239 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
240 -e s
/s390x
/s390
/ -e s
/parisc64
/parisc
/ \
241 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
242 -e s
/sh
[234].
*/sh
/ -e s
/aarch64.
*/arm64
/ )
244 # Cross compiling and selecting different set of gcc/bin-utils
245 # ---------------------------------------------------------------------------
247 # When performing cross compilation for other architectures ARCH shall be set
248 # to the target architecture. (See arch/* for the possibilities).
249 # ARCH can be set during invocation of make:
251 # Another way is to have ARCH set in the environment.
252 # The default ARCH is the host where make is executed.
254 # CROSS_COMPILE specify the prefix used for all executables used
255 # during compilation. Only gcc and related bin-utils executables
256 # are prefixed with $(CROSS_COMPILE).
257 # CROSS_COMPILE can be set on the command line
258 # make CROSS_COMPILE=ia64-linux-
259 # Alternatively CROSS_COMPILE can be set in the environment.
260 # A third alternative is to store a setting in .config so that plain
261 # "make" in the configured kernel build directory always uses that.
262 # Default value for CROSS_COMPILE is not to prefix executables
263 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
265 CROSS_COMPILE ?
= $(CONFIG_CROSS_COMPILE
:"%"=%)
267 # Architecture as present in compile.h
268 UTS_MACHINE
:= $(ARCH
)
271 # Additional ARCH settings for x86
275 ifeq ($(ARCH
),x86_64
)
279 # Additional ARCH settings for sparc
280 ifeq ($(ARCH
),sparc32
)
283 ifeq ($(ARCH
),sparc64
)
287 # Additional ARCH settings for sh
292 # Additional ARCH settings for tile
293 ifeq ($(ARCH
),tilepro
)
296 ifeq ($(ARCH
),tilegx
)
300 # Where to locate arch specific headers
301 hdr-arch
:= $(SRCARCH
)
303 KCONFIG_CONFIG ?
= .config
304 export KCONFIG_CONFIG
306 # SHELL used by kbuild
307 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
308 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
309 else echo sh
; fi
; fi
)
311 HOST_LFS_CFLAGS
:= $(shell getconf LFS_CFLAGS
)
312 HOST_LFS_LDFLAGS
:= $(shell getconf LFS_LDFLAGS
)
313 HOST_LFS_LIBS
:= $(shell getconf LFS_LIBS
)
317 HOSTCFLAGS
:= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2 \
318 -fomit-frame-pointer
-std
=gnu89
$(HOST_LFS_CFLAGS
)
319 HOSTCXXFLAGS
:= -O2
$(HOST_LFS_CFLAGS
)
320 HOSTLDFLAGS
:= $(HOST_LFS_LDFLAGS
)
321 HOST_LOADLIBES
:= $(HOST_LFS_LIBS
)
323 ifeq ($(shell $(HOSTCC
) -v
2>&1 | grep
-c
"clang version"), 1)
324 HOSTCFLAGS
+= -Wno-unused-value
-Wno-unused-parameter \
325 -Wno-missing-field-initializers
-fno-delete-null-pointer-checks
328 # Decide whether to build built-in, modular, or both.
329 # Normally, just do built-in.
334 # If we have only "make modules", don't compile built-in objects.
335 # When we're building modules with modversions, we need to consider
336 # the built-in objects during the descend as well, in order to
337 # make sure the checksums are up to date before we record them.
339 ifeq ($(MAKECMDGOALS
),modules
)
340 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
343 # If we have "make <whatever> modules", compile modules
344 # in addition to whatever we do anyway.
345 # Just "make" or "make all" shall build modules as well
347 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
351 ifeq ($(MAKECMDGOALS
),)
355 export KBUILD_MODULES KBUILD_BUILTIN
356 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
358 # We need some generic definitions (do not try to remake the file).
359 scripts
/Kbuild.
include: ;
360 include scripts
/Kbuild.
include
362 # Make variables (CC, etc...)
363 AS
= $(CROSS_COMPILE
)as
364 LD
= $(CROSS_COMPILE
)ld
365 CC
= $(CROSS_COMPILE
)gcc
367 AR
= $(CROSS_COMPILE
)ar
368 NM
= $(CROSS_COMPILE
)nm
369 STRIP
= $(CROSS_COMPILE
)strip
370 OBJCOPY
= $(CROSS_COMPILE
)objcopy
371 OBJDUMP
= $(CROSS_COMPILE
)objdump
373 GENKSYMS
= scripts
/genksyms
/genksyms
374 INSTALLKERNEL
:= installkernel
375 DEPMOD
= /sbin
/depmod
380 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
381 -Wbitwise
-Wno-return-void
$(CF
)
382 KMSG_CHECK
= $(srctree
)/scripts
/kmsg-doc
390 CFLAGS_GCOV
:= -fprofile-arcs
-ftest-coverage
-fno-tree-loop-im
$(call cc-disable-warning
,maybe-uninitialized
,)
391 CFLAGS_KCOV
:= $(call cc-option
,-fsanitize-coverage
=trace-pc
,)
393 # Prefer linux-backports-modules
394 ifneq ($(KBUILD_SRC
),)
395 ifneq ($(shell if
test -e
$(KBUILD_OUTPUT
)/ubuntu-build
; then echo yes
; fi
),yes
)
396 UBUNTUINCLUDE
:= -I
/usr
/src
/linux-headers-lbm-
$(KERNELRELEASE
)
400 # Use USERINCLUDE when you must reference the UAPI directories only.
402 -I
$(srctree
)/arch
/$(hdr-arch
)/include/uapi \
403 -I
$(objtree
)/arch
/$(hdr-arch
)/include/generated
/uapi \
404 -I
$(srctree
)/include/uapi \
405 -I
$(objtree
)/include/generated
/uapi \
406 -include $(srctree
)/include/linux
/kconfig.h
408 # Use LINUXINCLUDE when you must reference the include/ directory.
409 # Needed to be compatible with the O= option
412 -I
$(srctree
)/arch
/$(hdr-arch
)/include \
413 -I
$(objtree
)/arch
/$(hdr-arch
)/include/generated \
414 $(if
$(KBUILD_SRC
), -I
$(srctree
)/include) \
415 -I
$(objtree
)/include \
418 # UBUNTU: Include our third party driver stuff too
419 LINUXINCLUDE
+= -Iubuntu
/include $(if
$(KBUILD_SRC
),-I
$(srctree
)/ubuntu
/include)
421 KBUILD_CPPFLAGS
:= -D__KERNEL__
423 KBUILD_CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
424 -fno-strict-aliasing
-fno-common
-fshort-wchar \
425 -Werror-implicit-function-declaration \
426 -Wno-format-security \
427 -std
=gnu89
$(call cc-option
,-fno-PIE
)
430 KBUILD_AFLAGS_KERNEL
:=
431 KBUILD_CFLAGS_KERNEL
:=
432 KBUILD_AFLAGS
:= -D__ASSEMBLY__
$(call cc-option
,-fno-PIE
)
433 KBUILD_AFLAGS_MODULE
:= -DMODULE
434 KBUILD_CFLAGS_MODULE
:= -DMODULE
435 KBUILD_LDFLAGS_MODULE
:= -T
$(srctree
)/scripts
/module-common.lds
437 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
438 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
439 KERNELVERSION
= $(VERSION
)$(if
$(PATCHLEVEL
),.
$(PATCHLEVEL
)$(if
$(SUBLEVEL
),.
$(SUBLEVEL
)))$(EXTRAVERSION
)
441 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
442 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
443 export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
444 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
445 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
447 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
448 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
449 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
450 export KBUILD_KMSG_CHECK KMSG_CHECK
451 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
452 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
453 export KBUILD_ARFLAGS
455 # When compiling out-of-tree modules, put MODVERDIR in the module
456 # tree rather than in the kernel tree. The kernel tree might
458 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
460 # Files to ignore in find ... statements
462 export RCS_FIND_IGNORE
:= \
( -name SCCS
-o
-name BitKeeper
-o
-name .svn
-o \
463 -name CVS
-o
-name .
pc -o
-name .hg
-o
-name .git \
) \
465 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn \
466 --exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
468 # ===========================================================================
469 # Rules shared between *config targets and build targets
471 # Basic helpers built in scripts/basic/
472 PHONY
+= scripts_basic
474 $(Q
)$(MAKE
) $(build
)=scripts
/basic
475 $(Q
)rm -f .tmp_quiet_recordmcount
477 # To avoid any implicit rule to kick in, define an empty command.
478 scripts
/basic
/%: scripts_basic
;
480 PHONY
+= outputmakefile
481 # outputmakefile generates a Makefile in the output directory, if using a
482 # separate output directory. This allows convenient use of make in the
485 ifneq ($(KBUILD_SRC
),)
486 $(Q
)ln
-fsn
$(srctree
) source
487 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
488 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
491 # Support for using generic headers in asm-generic
492 PHONY
+= asm-generic uapi-asm-generic
493 asm-generic
: uapi-asm-generic
494 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.asm-generic \
495 src
=asm obj
=arch
/$(SRCARCH
)/include/generated
/asm
497 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.asm-generic \
498 src
=uapi
/asm obj
=arch
/$(SRCARCH
)/include/generated
/uapi
/asm
500 # To make sure we do not include .config for any of the *config targets
501 # catch them early, and hand them over to scripts/kconfig/Makefile
502 # It is allowed to specify more targets when calling make, including
503 # mixing *config targets and build targets.
504 # For example 'make oldconfig all'.
505 # Detect when mixed targets is specified, and make a second invocation
506 # of make so .config is not included in this case either (for *config).
508 version_h
:= include/generated
/uapi
/linux
/version.h
509 old_version_h
:= include/linux
/version.h
511 no-dot-config-targets
:= clean mrproper
distclean \
512 cscope gtags TAGS
tags help
% %docs
check% coccicheck \
513 $(version_h
) headers_
% archheaders archscripts \
514 kernelversion
%src-pkg
520 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
521 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
526 ifeq ($(KBUILD_EXTMOD
),)
527 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
529 ifneq ($(words $(MAKECMDGOALS
)),1)
534 # install and modules_install need also be processed one by one
535 ifneq ($(filter install,$(MAKECMDGOALS
)),)
536 ifneq ($(filter modules_install
,$(MAKECMDGOALS
)),)
541 ifeq ($(mixed-targets
),1)
542 # ===========================================================================
543 # We're called with mixed targets (*config and build targets).
544 # Handle them one by one.
546 PHONY
+= $(MAKECMDGOALS
) __build_one_by_one
548 $(filter-out __build_one_by_one
, $(MAKECMDGOALS
)): __build_one_by_one
553 for i in
$(MAKECMDGOALS
); do \
554 $(MAKE
) -f
$(srctree
)/Makefile
$$i; \
558 ifeq ($(config-targets
),1)
559 # ===========================================================================
560 # *config targets only - make sure prerequisites are updated, and descend
561 # in scripts/kconfig to make the *config target
563 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
564 # KBUILD_DEFCONFIG may point out an alternative default configuration
565 # used for 'make defconfig'
566 include arch
/$(SRCARCH
)/Makefile
567 export KBUILD_DEFCONFIG KBUILD_KCONFIG
569 config
: scripts_basic outputmakefile FORCE
570 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
572 %config
: scripts_basic outputmakefile FORCE
573 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
576 # ===========================================================================
577 # Build targets only - this includes vmlinux, arch specific targets, clean
578 # targets and others. In general all targets except *config targets.
580 ifeq ($(KBUILD_EXTMOD
),)
581 # Additional helpers built in scripts/
582 # Carefully list dependencies so we do not try to build scripts twice
585 scripts
: scripts_basic
include/config
/auto.conf
include/config
/tristate.conf \
586 asm-generic gcc-plugins
587 $(Q
)$(MAKE
) $(build
)=$(@
)
589 # Objects we will link into vmlinux / subdirs we need to visit
591 drivers-y
:= drivers
/ sound
/ firmware
/ ubuntu
/
596 endif # KBUILD_EXTMOD
598 ifeq ($(dot-config
),1)
600 -include include/config
/auto.conf
602 ifeq ($(KBUILD_EXTMOD
),)
603 # Read in dependencies to all Kconfig* files, make sure to run
604 # oldconfig if changes are detected.
605 -include include/config
/auto.conf.cmd
607 # To avoid any implicit rule to kick in, define an empty command
608 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
610 # If .config is newer than include/config/auto.conf, someone tinkered
611 # with it and forgot to run make oldconfig.
612 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
613 # we execute the config step to be sure to catch updated Kconfig files
614 include/config
/%.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
615 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
617 # external modules needs include/generated/autoconf.h and include/config/auto.conf
618 # but do not care if they are up-to-date. Use auto.conf to trigger the test
619 PHONY
+= include/config
/auto.conf
621 include/config
/auto.conf
:
622 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
624 echo
>&2 " ERROR: Kernel configuration is invalid."; \
625 echo
>&2 " include/generated/autoconf.h or $@ are missing.";\
626 echo
>&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
630 endif # KBUILD_EXTMOD
633 # Dummy target needed, because used as prerequisite
634 include/config
/auto.conf
: ;
635 endif # $(dot-config)
637 # For the kernel to actually contain only the needed exported symbols,
638 # we have to build modules as well to determine what those symbols are.
639 # (this can be evaluated only once include/config/auto.conf has been included)
640 ifdef CONFIG_TRIM_UNUSED_KSYMS
644 # The all: target is the default when no target is given on the
646 # This allow a user to issue only 'make' to build a kernel including modules
647 # Defaults to vmlinux, but the arch makefile usually adds further targets
650 # force no-pie for distro compilers that enable pie by default
651 KBUILD_CFLAGS
+= $(call cc-option
, -fno-pie
)
652 KBUILD_CFLAGS
+= $(call cc-option
, -no-pie
)
653 KBUILD_AFLAGS
+= $(call cc-option
, -fno-pie
)
654 KBUILD_CPPFLAGS
+= $(call cc-option
, -fno-pie
)
656 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
657 # values of the respective KBUILD_* variables
661 include arch
/$(SRCARCH
)/Makefile
663 KBUILD_CFLAGS
+= $(call cc-option
,-fno-delete-null-pointer-checks
,)
664 KBUILD_CFLAGS
+= $(call cc-disable-warning
,frame-address
,)
665 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-truncation
)
666 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-overflow
)
667 KBUILD_CFLAGS
+= $(call cc-disable-warning
, int-in-bool-context
)
669 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
670 KBUILD_CFLAGS
+= $(call cc-option
,-Oz
,-Os
)
671 KBUILD_CFLAGS
+= $(call cc-disable-warning
,maybe-uninitialized
,)
673 ifdef CONFIG_PROFILE_ALL_BRANCHES
674 KBUILD_CFLAGS
+= -O2
$(call cc-disable-warning
,maybe-uninitialized
,)
680 KBUILD_CFLAGS
+= $(call cc-ifversion
, -lt
, 0409, \
681 $(call cc-disable-warning
,maybe-uninitialized
,))
683 # Tell gcc to never replace conditional load with a non-conditional one
684 KBUILD_CFLAGS
+= $(call cc-option
,--param
=allow-store-data-races
=0)
686 # check for 'asm goto'
687 ifeq ($(shell $(CONFIG_SHELL
) $(srctree
)/scripts
/gcc-goto.sh
$(CC
) $(KBUILD_CFLAGS
)), y
)
688 KBUILD_CFLAGS
+= -DCC_HAVE_ASM_GOTO
689 KBUILD_AFLAGS
+= -DCC_HAVE_ASM_GOTO
692 include scripts
/Makefile.gcc-plugins
694 ifdef CONFIG_READABLE_ASM
695 # Disable optimizations that make assembler listings hard to read.
696 # reorder blocks reorders the control in the function
697 # ipa clone creates specialized cloned functions
698 # partial inlining inlines only parts of functions
699 KBUILD_CFLAGS
+= $(call cc-option
,-fno-reorder-blocks
,) \
700 $(call cc-option
,-fno-ipa-cp-clone
,) \
701 $(call cc-option
,-fno-partial-inlining
)
704 ifneq ($(CONFIG_FRAME_WARN
),0)
705 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
708 # This selects the stack protector compiler flag. Testing it is delayed
709 # until after .config has been reprocessed, in the prepare-compiler-check
711 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
712 stackp-flag
:= -fstack-protector
713 stackp-name
:= REGULAR
715 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
716 stackp-flag
:= -fstack-protector-strong
717 stackp-name
:= STRONG
719 # Force off for distro compilers that enable stack protector by default.
720 stackp-flag
:= $(call cc-option
, -fno-stack-protector
)
723 # Find arch-specific stack protector compiler sanity-checking script.
724 ifdef CONFIG_CC_STACKPROTECTOR
725 stackp-path
:= $(srctree
)/scripts
/gcc-
$(SRCARCH
)_
$(BITS
)-has-stack-protector.sh
726 stackp-check
:= $(wildcard $(stackp-path
))
728 KBUILD_CFLAGS
+= $(stackp-flag
)
730 ifeq ($(cc-name
),clang
)
731 ifneq ($(CROSS_COMPILE
),)
732 CLANG_TARGET
:= -target
$(notdir $(CROSS_COMPILE
:%-=%))
733 GCC_TOOLCHAIN
:= $(realpath
$(dir $(shell which
$(LD
)))/..
)
735 ifneq ($(GCC_TOOLCHAIN
),)
736 CLANG_GCC_TC
:= -gcc-toolchain
$(GCC_TOOLCHAIN
)
738 KBUILD_CFLAGS
+= $(CLANG_TARGET
) $(CLANG_GCC_TC
)
739 KBUILD_AFLAGS
+= $(CLANG_TARGET
) $(CLANG_GCC_TC
)
740 KBUILD_CPPFLAGS
+= $(call cc-option
,-Qunused-arguments
,)
741 KBUILD_CFLAGS
+= $(call cc-disable-warning
, unused-variable
)
742 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-invalid-specifier
)
743 KBUILD_CFLAGS
+= $(call cc-disable-warning
, gnu
)
744 KBUILD_CFLAGS
+= $(call cc-disable-warning
, address-of-packed-member
)
745 # Quiet clang warning: comparison of unsigned expression < 0 is always false
746 KBUILD_CFLAGS
+= $(call cc-disable-warning
, tautological-compare
)
747 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
748 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
749 # See modpost pattern 2
750 KBUILD_CFLAGS
+= $(call cc-option
, -mno-global-merge
,)
751 KBUILD_CFLAGS
+= $(call cc-option
, -fcatch-undefined-behavior
)
752 KBUILD_CFLAGS
+= $(call cc-option
, -no-integrated-as
)
753 KBUILD_AFLAGS
+= $(call cc-option
, -no-integrated-as
)
756 # These warnings generated too much noise in a regular build.
757 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
758 KBUILD_CFLAGS
+= $(call cc-disable-warning
, unused-but-set-variable
)
759 KBUILD_CFLAGS
+= $(call cc-disable-warning
, unused-const-variable
)
762 ifdef CONFIG_FRAME_POINTER
763 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
765 # Some targets (ARM with Thumb2, for example), can't be built with frame
766 # pointers. For those, we don't have FUNCTION_TRACER automatically
767 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
768 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
769 # -fomit-frame-pointer with FUNCTION_TRACER.
770 ifndef CONFIG_FUNCTION_TRACER
771 KBUILD_CFLAGS
+= -fomit-frame-pointer
775 KBUILD_CFLAGS
+= $(call cc-option
, -fno-var-tracking-assignments
)
777 ifdef CONFIG_DEBUG_INFO
778 ifdef CONFIG_DEBUG_INFO_SPLIT
779 KBUILD_CFLAGS
+= $(call cc-option
, -gsplit-dwarf
, -g
)
783 KBUILD_AFLAGS
+= -Wa
,-gdwarf-2
785 ifdef CONFIG_DEBUG_INFO_DWARF4
786 KBUILD_CFLAGS
+= $(call cc-option
, -gdwarf-4
,)
789 ifdef CONFIG_DEBUG_INFO_REDUCED
790 KBUILD_CFLAGS
+= $(call cc-option
, -femit-struct-debug-baseonly
) \
791 $(call cc-option
,-fno-var-tracking
)
794 ifdef CONFIG_FUNCTION_TRACER
795 ifndef CC_FLAGS_FTRACE
796 CC_FLAGS_FTRACE
:= -pg
798 export CC_FLAGS_FTRACE
799 ifdef CONFIG_HAVE_FENTRY
800 CC_USING_FENTRY
:= $(call cc-option
, -mfentry
-DCC_USING_FENTRY
)
802 KBUILD_CFLAGS
+= $(CC_FLAGS_FTRACE
) $(CC_USING_FENTRY
)
803 KBUILD_AFLAGS
+= $(CC_USING_FENTRY
)
804 ifdef CONFIG_DYNAMIC_FTRACE
805 ifdef CONFIG_HAVE_C_RECORDMCOUNT
806 BUILD_C_RECORDMCOUNT
:= y
807 export BUILD_C_RECORDMCOUNT
812 # We trigger additional mismatches with less inlining
813 ifdef CONFIG_DEBUG_SECTION_MISMATCH
814 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
817 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
818 KBUILD_CFLAGS
+= $(call cc-option
,-ffunction-sections
,)
819 KBUILD_CFLAGS
+= $(call cc-option
,-fdata-sections
,)
822 # arch Makefile may override CC so keep this after arch Makefile is included
823 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
824 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
826 # warn about C99 declaration after statement
827 KBUILD_CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
829 # disable pointer signed / unsigned warnings in gcc 4.0
830 KBUILD_CFLAGS
+= $(call cc-disable-warning
, pointer-sign
)
832 # disable invalid "can't wrap" optimizations for signed / pointers
833 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
835 # conserve stack if available
836 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
838 # disallow errors like 'EXPORT_GPL(foo);' with missing header
839 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=implicit-int
)
841 # require functions to have arguments in prototypes, not empty 'int foo()'
842 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=strict-prototypes
)
844 # Prohibit date/time macros, which would make the build non-deterministic
845 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=date-time
)
847 # enforce correct pointer usage
848 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=incompatible-pointer-types
)
850 # Require designated initializers for all marked structures
851 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=designated-init
)
853 # use the deterministic mode of AR if available
854 KBUILD_ARFLAGS
:= $(call ar-option
,D
)
856 include scripts
/Makefile.kasan
857 include scripts
/Makefile.extrawarn
858 include scripts
/Makefile.ubsan
860 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
862 KBUILD_CPPFLAGS
+= $(ARCH_CPPFLAGS
) $(KCPPFLAGS
)
863 KBUILD_AFLAGS
+= $(ARCH_AFLAGS
) $(KAFLAGS
)
864 KBUILD_CFLAGS
+= $(ARCH_CFLAGS
) $(KCFLAGS
)
866 # Use --build-id when available.
867 LDFLAGS_BUILD_ID
:= $(patsubst -Wl
$(comma
)%,%,\
868 $(call cc-ldoption
, -Wl
$(comma
)--build-id
,))
869 KBUILD_LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
870 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
872 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
873 LDFLAGS_vmlinux
+= $(call ld-option
, --gc-sections
,)
876 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
877 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
880 # Default kernel image to build when no specific target is given.
881 # KBUILD_IMAGE may be overruled on the command line or
882 # set in the environment
883 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
885 export KBUILD_IMAGE ?
= vmlinux
888 # INSTALL_PATH specifies where to place the updated kernel and system map
889 # images. Default is /boot, but you can set it to other values
890 export INSTALL_PATH ?
= /boot
893 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
894 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
895 # an argument if needed. Otherwise it defaults to the kernel install path
897 export INSTALL_DTBS_PATH ?
= $(INSTALL_PATH
)/dtbs
/$(KERNELRELEASE
)
900 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
901 # relocations required by build roots. This is not defined in the
902 # makefile but the argument can be passed to make if needed.
905 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
909 # INSTALL_MOD_STRIP, if defined, will cause modules to be
910 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
911 # the default option --strip-debug will be used. Otherwise,
912 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
914 ifdef INSTALL_MOD_STRIP
915 ifeq ($(INSTALL_MOD_STRIP
),1)
916 mod_strip_cmd
= $(STRIP
) --strip-debug
918 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
919 endif # INSTALL_MOD_STRIP=1
922 endif # INSTALL_MOD_STRIP
925 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
926 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
927 # or CONFIG_MODULE_COMPRESS_XZ.
929 mod_compress_cmd
= true
930 ifdef CONFIG_MODULE_COMPRESS
931 ifdef CONFIG_MODULE_COMPRESS_GZIP
932 mod_compress_cmd
= gzip
-n
-f
933 endif # CONFIG_MODULE_COMPRESS_GZIP
934 ifdef CONFIG_MODULE_COMPRESS_XZ
935 mod_compress_cmd
= xz
-f
936 endif # CONFIG_MODULE_COMPRESS_XZ
937 endif # CONFIG_MODULE_COMPRESS
938 export mod_compress_cmd
940 # Select initial ramdisk compression format, default is gzip(1).
941 # This shall be used by the dracut(8) tool while creating an initramfs image.
943 INITRD_COMPRESS-y
:= gzip
944 INITRD_COMPRESS-
$(CONFIG_RD_BZIP2
) := bzip2
945 INITRD_COMPRESS-
$(CONFIG_RD_LZMA
) := lzma
946 INITRD_COMPRESS-
$(CONFIG_RD_XZ
) := xz
947 INITRD_COMPRESS-
$(CONFIG_RD_LZO
) := lzo
948 INITRD_COMPRESS-
$(CONFIG_RD_LZ4
) := lz4
949 # do not export INITRD_COMPRESS, since we didn't actually
950 # choose a sane default compression above.
951 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
953 ifdef CONFIG_MODULE_SIG_ALL
954 $(eval
$(call config_filename
,MODULE_SIG_KEY
))
956 mod_sign_cmd
= scripts
/sign-file
$(CONFIG_MODULE_SIG_HASH
) $(MODULE_SIG_KEY_SRCPREFIX
)$(CONFIG_MODULE_SIG_KEY
) certs
/signing_key.x509
962 ifdef CONFIG_STACK_VALIDATION
963 has_libelf
:= $(call try-run
,\
964 echo
"int main() {}" |
$(HOSTCC
) -xc
-o
/dev
/null
-lelf
-,1,0)
965 ifeq ($(has_libelf
),1)
966 objtool_target
:= tools
/objtool FORCE
968 ifdef CONFIG_UNWINDER_ORC
969 $(error
"Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
971 $(warning
"Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
973 SKIP_STACK_VALIDATION
:= 1
974 export SKIP_STACK_VALIDATION
979 ifeq ($(KBUILD_EXTMOD
),)
980 core-y
+= kernel
/ certs
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
982 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
983 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
984 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
) $(virt-y
)))
986 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
987 $(init-
) $(core-
) $(drivers-
) $(net-
) $(libs-
) $(virt-
))))
989 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
990 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
991 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
992 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
993 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
994 libs-y2
:= $(filter-out %.a
, $(patsubst %/, %/built-in.o
, $(libs-y
)))
995 virt-y
:= $(patsubst %/, %/built-in.o
, $(virt-y
))
997 # Externally visible symbols (used by link-vmlinux.sh)
998 export KBUILD_VMLINUX_INIT
:= $(head-y
) $(init-y
)
999 export KBUILD_VMLINUX_MAIN
:= $(core-y
) $(libs-y2
) $(drivers-y
) $(net-y
) $(virt-y
)
1000 export KBUILD_VMLINUX_LIBS
:= $(libs-y1
)
1001 export KBUILD_LDS
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
1002 export LDFLAGS_vmlinux
1003 # used by scripts/package/Makefile
1004 export KBUILD_ALLDIRS
:= $(sort $(filter-out arch
/%,$(vmlinux-alldirs
)) arch Documentation
include samples scripts tools
)
1006 vmlinux-deps
:= $(KBUILD_LDS
) $(KBUILD_VMLINUX_INIT
) $(KBUILD_VMLINUX_MAIN
) $(KBUILD_VMLINUX_LIBS
)
1008 # Include targets which we want to execute sequentially if the rest of the
1009 # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
1010 # evaluated more than once.
1011 PHONY
+= vmlinux_prereq
1012 vmlinux_prereq
: $(vmlinux-deps
) FORCE
1013 ifdef CONFIG_HEADERS_CHECK
1014 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
1016 ifdef CONFIG_GDB_SCRIPTS
1017 $(Q
)ln
-fsn
`cd $(srctree) && /bin/pwd`/scripts
/gdb
/vmlinux-gdb.py
1019 ifdef CONFIG_TRIM_UNUSED_KSYMS
1020 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/adjust_autoksyms.sh \
1021 "$(MAKE) -f $(srctree)/Makefile vmlinux"
1024 # standalone target for easier testing
1025 include/generated
/autoksyms.h
: FORCE
1026 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/adjust_autoksyms.sh true
1028 ARCH_POSTLINK
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/Makefile.postlink
)
1030 # Final link of vmlinux with optional arch pass after final link
1031 cmd_link-vmlinux
= \
1032 $(CONFIG_SHELL
) $< $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
) ; \
1033 $(if
$(ARCH_POSTLINK
), $(MAKE
) -f
$(ARCH_POSTLINK
) $@
, true
)
1035 vmlinux
: scripts
/link-vmlinux.sh vmlinux_prereq
$(vmlinux-deps
) FORCE
1036 +$(call if_changed
,link-vmlinux
)
1038 # Build samples along the rest of the kernel
1039 ifdef CONFIG_SAMPLES
1040 vmlinux-dirs
+= samples
1043 # The actual objects are generated when descending,
1044 # make sure no implicit rule kicks in
1045 $(sort $(vmlinux-deps
)): $(vmlinux-dirs
) ;
1047 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1048 # Preset locale variables to speed up the build process. Limit locale
1049 # tweaks to this spot to avoid wrong language settings when running
1050 # make menuconfig etc.
1051 # Error messages still appears in the original language
1053 PHONY
+= $(vmlinux-dirs
)
1054 $(vmlinux-dirs
): prepare scripts
1055 $(Q
)$(MAKE
) $(build
)=$@
1057 define filechk_kernel.release
1058 echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1061 # Store (new) KERNELRELEASE string in include/config/kernel.release
1062 include/config
/kernel.release
: include/config
/auto.conf FORCE
1063 $(call filechk
,kernel.release
)
1066 # Things we need to do before we recursively start building the kernel
1067 # or the modules are listed in "prepare".
1068 # A multi level approach is used. prepareN is processed before prepareN-1.
1069 # archprepare is used in arch Makefiles and when processed asm symlink,
1070 # version.h and scripts_basic is processed / created.
1072 # Listed in dependency order
1073 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
1075 # prepare3 is used to check if we are building in a separate output directory,
1077 # 1) Check that make has not been executed in the kernel src $(srctree)
1078 prepare3
: include/config
/kernel.release
1079 ifneq ($(KBUILD_SRC
),)
1080 @
$(kecho
) ' Using $(srctree) as source for kernel'
1081 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
1082 echo
>&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1083 echo
>&2 " in the '$(srctree)' directory.";\
1088 # prepare2 creates a makefile if using a separate output directory.
1089 # From this point forward, .config has been reprocessed, so any rules
1090 # that need to depend on updated CONFIG_* values can be checked here.
1091 prepare2
: prepare3 prepare-compiler-check outputmakefile asm-generic
1093 prepare1
: prepare2
$(version_h
) include/generated
/utsrelease.h \
1094 include/config
/auto.conf
1097 archprepare
: archheaders archscripts prepare1 scripts_basic
1099 prepare0
: archprepare gcc-plugins
1100 $(Q
)$(MAKE
) $(build
)=.
1102 # All the preparing..
1103 prepare
: prepare0 prepare-objtool
1105 PHONY
+= prepare-objtool
1106 prepare-objtool
: $(objtool_target
)
1108 # Check for CONFIG flags that require compiler support. Abort the build
1109 # after .config has been processed, but before the kernel build starts.
1111 # For security-sensitive CONFIG options, we don't want to fallback and/or
1112 # silently change which compiler flags will be used, since that leads to
1113 # producing kernels with different security feature characteristics
1114 # depending on the compiler used. (For example, "But I selected
1115 # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1116 PHONY
+= prepare-compiler-check
1117 prepare-compiler-check
: FORCE
1118 # Make sure compiler supports requested stack protector flag.
1120 ifeq ($(call cc-option
, $(stackp-flag
)),)
1121 @echo Cannot use CONFIG_CC_STACKPROTECTOR_
$(stackp-name
): \
1122 $(stackp-flag
) not supported by compiler
>&2 && exit
1
1125 # Make sure compiler does not have buggy stack-protector support.
1127 ifneq ($(shell $(CONFIG_SHELL
) $(stackp-check
) $(CC
) $(KBUILD_CPPFLAGS
) $(biarch
)),y
)
1128 @echo Cannot use CONFIG_CC_STACKPROTECTOR_
$(stackp-name
): \
1129 $(stackp-flag
) available but compiler is broken
>&2 && exit
1
1134 # Generate some files
1135 # ---------------------------------------------------------------------------
1137 # KERNELRELEASE can change from a few different places, meaning version.h
1138 # needs to be updated, so this check is forced on all builds
1141 define filechk_utsrelease.h
1142 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
1143 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1146 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1149 define filechk_version.h
1150 (echo \
#define LINUX_VERSION_CODE $(shell \
1151 expr
$(VERSION
) \
* 65536 + 0$(PATCHLEVEL
) \
* 256 + 0$(SUBLEVEL
)); \
1152 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1155 $(version_h
): $(srctree
)/Makefile FORCE
1156 $(call filechk
,version.h
)
1157 $(Q
)rm -f
$(old_version_h
)
1159 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
1160 $(call filechk
,utsrelease.h
)
1164 $(Q
)find
$(srctree
)/include/ -name
'*.h' | xargs
--max-args
1 \
1165 $(srctree
)/scripts
/headerdep.pl
-I
$(srctree
)/include
1167 # ---------------------------------------------------------------------------
1169 INSTALL_FW_PATH
=$(INSTALL_MOD_PATH
)/lib
/firmware
1170 export INSTALL_FW_PATH
1172 PHONY
+= firmware_install
1174 @mkdir
-p
$(objtree
)/firmware
1175 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_install
1177 # ---------------------------------------------------------------------------
1180 #Default location for installed headers
1181 export INSTALL_HDR_PATH
= $(objtree
)/usr
1183 # If we do an all arch process set dst to include/arch-$(hdr-arch)
1184 hdr-dst
= $(if
$(KBUILD_HEADERS
), dst
=include/arch-
$(hdr-arch
), dst
=include)
1186 PHONY
+= archheaders
1189 PHONY
+= archscripts
1193 __headers
: $(version_h
) scripts_basic uapi-asm-generic archheaders archscripts
1194 $(Q
)$(MAKE
) $(build
)=scripts build_unifdef
1196 PHONY
+= headers_install_all
1197 headers_install_all
:
1198 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
install
1200 PHONY
+= headers_install
1201 headers_install
: __headers
1202 $(if
$(wildcard $(srctree
)/arch
/$(hdr-arch
)/include/uapi
/asm
/Kbuild
),, \
1203 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
1204 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi dst
=include
1205 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/uapi
$(hdr-dst
)
1206 $(Q
)$(MAKE
) $(hdr-inst
)=ubuntu
/include dst
=include oldheaders
=
1208 PHONY
+= headers_check_all
1209 headers_check_all
: headers_install_all
1210 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
check
1212 PHONY
+= headers_check
1213 headers_check
: headers_install
1214 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi dst
=include HDRCHECK
=1
1215 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/uapi
$(hdr-dst
) HDRCHECK
=1
1216 $(Q
)$(MAKE
) $(hdr-inst
)=ubuntu
/include dst
=include oldheaders
= HDRCHECK
=1
1218 # ---------------------------------------------------------------------------
1223 $(Q
)$(MAKE
) -C tools
/testing
/selftests run_tests
1225 PHONY
+= kselftest-clean
1227 $(Q
)$(MAKE
) -C tools
/testing
/selftests
clean
1229 PHONY
+= kselftest-merge
1231 $(if
$(wildcard $(objtree
)/.config
),, $(error No .config exists
, config your kernel first
!))
1232 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/kconfig
/merge_config.sh \
1233 -m
$(objtree
)/.config \
1234 $(srctree
)/tools
/testing
/selftests
/*/config
1235 +$(Q
)$(MAKE
) -f
$(srctree
)/Makefile olddefconfig
1237 # ---------------------------------------------------------------------------
1240 ifdef CONFIG_MODULES
1242 # By default, build modules as well
1248 # A module can be listed more than once in obj-m resulting in
1249 # duplicate lines in modules.order files. Those are removed
1250 # using awk while concatenating to the final file.
1253 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
) modules.builtin
1254 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.order
) > $(objtree
)/modules.order
1255 @
$(kecho
) ' Building modules, stage 2.';
1256 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1257 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modbuild
1259 modules.builtin
: $(vmlinux-dirs
:%=%/modules.builtin
)
1260 $(Q
)$(AWK
) '!x[$$0]++' $^
> $(objtree
)/modules.builtin
1262 %/modules.builtin
: include/config
/auto.conf
1263 $(Q
)$(MAKE
) $(modbuiltin
)=$*
1266 # Target to prepare building external modules
1267 PHONY
+= modules_prepare
1268 modules_prepare
: prepare scripts
1270 # Target to install modules
1271 PHONY
+= modules_install
1272 modules_install
: _modinst_ _modinst_post
1276 @
rm -rf
$(MODLIB
)/kernel
1277 @
rm -f
$(MODLIB
)/source
1278 @mkdir
-p
$(MODLIB
)/kernel
1279 @ln
-s
`cd $(srctree) && /bin/pwd` $(MODLIB
)/source
1280 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1281 rm -f
$(MODLIB
)/build
; \
1282 ln
-s
$(CURDIR
) $(MODLIB
)/build
; \
1284 @cp
-f
$(objtree
)/modules.order
$(MODLIB
)/
1285 @cp
-f
$(objtree
)/modules.builtin
$(MODLIB
)/
1286 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1288 # This depmod is only for convenience to give the initial
1289 # boot a modules.dep even before / is mounted read-write. However the
1290 # boot script depmod is the master version.
1291 PHONY
+= _modinst_post
1292 _modinst_post
: _modinst_
1293 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modinst
1296 ifeq ($(CONFIG_MODULE_SIG
), y
)
1297 PHONY
+= modules_sign
1299 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modsign
1302 else # CONFIG_MODULES
1304 # Modules not configured
1305 # ---------------------------------------------------------------------------
1307 PHONY
+= modules modules_install
1308 modules modules_install
:
1310 @echo
>&2 "The present kernel configuration has modules disabled."
1311 @echo
>&2 "Type 'make config' and enable loadable module support."
1312 @echo
>&2 "Then build a kernel with module support enabled."
1316 endif # CONFIG_MODULES
1319 # Cleaning is done on three levels.
1320 # make clean Delete most generated files
1321 # Leave enough to build external modules
1322 # make mrproper Delete the current configuration, and all generated files
1323 # make distclean Remove editor backup files, patch leftover files and the like
1325 # Directories & files removed with 'make clean'
1326 CLEAN_DIRS
+= $(MODVERDIR
)
1328 # Directories & files removed with 'make mrproper'
1329 MRPROPER_DIRS
+= include/config usr
/include include/generated \
1330 arch
/*/include/generated .tmp_objdiff
1331 MRPROPER_FILES
+= .config .config.old .version .old_version \
1332 Module.symvers
tags TAGS cscope
* GPATH GTAGS GRTAGS GSYMS \
1333 signing_key.pem signing_key.priv signing_key.x509 \
1334 x509.genkey extra_certificates signing_key.x509.keyid \
1335 signing_key.x509.signer vmlinux-gdb.py
1337 # clean - Delete most, but leave enough to build external modules
1339 clean: rm-dirs
:= $(CLEAN_DIRS
)
1340 clean: rm-files
:= $(CLEAN_FILES
)
1341 clean-dirs
:= $(addprefix _clean_
, .
$(vmlinux-alldirs
) Documentation samples
)
1343 PHONY
+= $(clean-dirs
) clean archclean vmlinuxclean
1345 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1348 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/link-vmlinux.sh
clean
1349 $(Q
)$(if
$(ARCH_POSTLINK
), $(MAKE
) -f
$(ARCH_POSTLINK
) clean)
1351 clean: archclean vmlinuxclean
1353 # mrproper - Delete all generated files, including .config
1355 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1356 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1357 mrproper-dirs
:= $(addprefix _mrproper_
,scripts
)
1359 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1361 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1363 mrproper
: clean archmrproper
$(mrproper-dirs
)
1372 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1373 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1374 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'*%' \
1375 -o
-name
'core' \
) \
1376 -type f
-print | xargs
rm -f
1379 # Packaging of the kernel to various formats
1380 # ---------------------------------------------------------------------------
1381 # rpm target kept for backward compatibility
1382 package-dir
:= scripts
/package
1385 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1386 %pkg
: include/config
/kernel.release FORCE
1387 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1388 rpm
: include/config
/kernel.release FORCE
1389 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1392 # Brief documentation of the typical targets used
1393 # ---------------------------------------------------------------------------
1395 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1396 boards
:= $(sort $(notdir $(boards
)))
1397 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1398 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1402 @echo
'Cleaning targets:'
1403 @echo
' clean - Remove most generated files but keep the config and'
1404 @echo
' enough build support to build external modules'
1405 @echo
' mrproper - Remove all generated files + config + various backup files'
1406 @echo
' distclean - mrproper + remove editor backup and patch files'
1408 @echo
'Configuration targets:'
1409 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1411 @echo
'Other generic targets:'
1412 @echo
' all - Build all targets marked with [*]'
1413 @echo
'* vmlinux - Build the bare kernel'
1414 @echo
'* modules - Build all modules'
1415 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1416 @echo
' firmware_install- Install all firmware to INSTALL_FW_PATH'
1417 @echo
' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1418 @echo
' dir/ - Build all files in dir and below'
1419 @echo
' dir/file.[ois] - Build specified target only'
1420 @echo
' dir/file.ll - Build the LLVM assembly file'
1421 @echo
' (requires compiler support for LLVM assembly generation)'
1422 @echo
' dir/file.lst - Build specified mixed source/assembly target only'
1423 @echo
' (requires a recent binutils and recent build (System.map))'
1424 @echo
' dir/file.ko - Build module including final link'
1425 @echo
' modules_prepare - Set up for building external modules'
1426 @echo
' tags/TAGS - Generate tags file for editors'
1427 @echo
' cscope - Generate cscope index'
1428 @echo
' gtags - Generate GNU GLOBAL index'
1429 @echo
' kernelrelease - Output the release version string (use with make -s)'
1430 @echo
' kernelversion - Output the version stored in Makefile (use with make -s)'
1431 @echo
' image_name - Output the image name (use with make -s)'
1432 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1433 echo
' (default: $(INSTALL_HDR_PATH))'; \
1435 @echo
'Static analysers:'
1436 @echo
' checkstack - Generate a list of stack hogs'
1437 @echo
' namespacecheck - Name space analysis on compiled kernel'
1438 @echo
' versioncheck - Sanity check on version.h usage'
1439 @echo
' includecheck - Check for duplicate included header files'
1440 @echo
' export_report - List the usages of all exported symbols'
1441 @echo
' headers_check - Sanity check on exported headers'
1442 @echo
' headerdep - Detect inclusion cycles in headers'
1443 @
$(MAKE
) -f
$(srctree
)/scripts
/Makefile.help checker-help
1445 @echo
'Kernel selftest:'
1446 @echo
' kselftest - Build and run kernel selftest (run as root)'
1447 @echo
' Build, install, and boot kernel before'
1448 @echo
' running kselftest on it'
1449 @echo
' kselftest-clean - Remove all generated kselftest files'
1450 @echo
' kselftest-merge - Merge all the config dependencies of kselftest to existed'
1453 @echo
'Userspace tools targets:'
1454 @echo
' use "make tools/help"'
1455 @echo
' or "cd tools; make help"'
1457 @echo
'Kernel packaging:'
1458 @
$(MAKE
) $(build
)=$(package-dir
) help
1460 @echo
'Documentation targets:'
1461 @
$(MAKE
) -f
$(srctree
)/Documentation
/Makefile dochelp
1463 @echo
'Architecture specific targets ($(SRCARCH)):'
1464 @
$(if
$(archhelp
),$(archhelp
),\
1465 echo
' No architecture specific help defined for $(SRCARCH)')
1468 $(foreach b
, $(boards
), \
1469 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1471 @
$(if
$(board-dirs
), \
1472 $(foreach b
, $(board-dirs
), \
1473 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1474 printf
" %-16s - Show all of the above\\n" help-boards
; \
1477 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1478 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1479 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1480 @echo
' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1481 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1482 @echo
' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1483 @echo
' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1484 @echo
' 1: warnings which may be relevant and do not occur too often'
1485 @echo
' 2: warnings which occur quite often but may still be relevant'
1486 @echo
' 3: more obscure warnings, can most likely be ignored'
1487 @echo
' Multiple levels can be combined with W=12 or W=123'
1489 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1490 @echo
'For further info see the ./README file'
1493 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1495 help-boards
: $(help-board-dirs
)
1497 boards-per-dir
= $(sort $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
)))
1499 $(help-board-dirs
): help-
%:
1500 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1501 @
$(if
$(boards-per-dir
), \
1502 $(foreach b
, $(boards-per-dir
), \
1503 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1507 # Documentation targets
1508 # ---------------------------------------------------------------------------
1509 DOC_TARGETS
:= xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs linkcheckdocs
1510 PHONY
+= $(DOC_TARGETS
)
1511 $(DOC_TARGETS
): scripts_basic FORCE
1512 $(Q
)$(MAKE
) $(build
)=Documentation
$@
1514 else # KBUILD_EXTMOD
1517 # External module support.
1518 # When building external modules the kernel used as basis is considered
1519 # read-only, and no consistency checks are made and the make
1520 # system is not used on the basis kernel. If updates are required
1521 # in the basis kernel ordinary make commands (without M=...) must
1524 # The following are the only valid targets when building external
1526 # make M=dir clean Delete all automatically generated files
1527 # make M=dir modules Make all modules in specified dir
1528 # make M=dir Same as 'make M=dir modules'
1529 # make M=dir modules_install
1530 # Install the modules built in the module directory
1531 # Assumes install directory is already created
1533 # We are always building modules
1535 PHONY
+= crmodverdir
1539 PHONY
+= $(objtree
)/Module.symvers
1540 $(objtree
)/Module.symvers
:
1541 @
test -e
$(objtree
)/Module.symvers ||
( \
1543 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1544 echo
" is missing; modules will have no dependencies and modversions."; \
1547 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1548 PHONY
+= $(module-dirs
) modules
1549 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1550 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1552 modules
: $(module-dirs
)
1553 @
$(kecho
) ' Building modules, stage 2.';
1554 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1556 PHONY
+= modules_install
1557 modules_install
: _emodinst_ _emodinst_post
1559 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1562 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1563 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1565 PHONY
+= _emodinst_post
1566 _emodinst_post
: _emodinst_
1569 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1571 PHONY
+= $(clean-dirs
) clean
1573 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1575 clean: rm-dirs
:= $(MODVERDIR
)
1576 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers
1580 @echo
' Building external modules.'
1581 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1583 @echo
' modules - default target, build the module(s)'
1584 @echo
' modules_install - install the module'
1585 @echo
' clean - remove generated files in module directory only'
1589 PHONY
+= prepare scripts
1592 endif # KBUILD_EXTMOD
1594 clean: $(clean-dirs
)
1597 @find
$(if
$(KBUILD_EXTMOD
), $(KBUILD_EXTMOD
), .
) $(RCS_FIND_IGNORE
) \
1598 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1602 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1603 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1604 -o
-name modules.builtin
-o
-name
'.tmp_*.o.*' \
1605 -o
-name
'*.c.[012]*.*' \
1607 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1609 # Generate tags for editors
1610 # ---------------------------------------------------------------------------
1611 quiet_cmd_tags
= GEN
$@
1612 cmd_tags
= $(CONFIG_SHELL
) $(srctree
)/scripts
/tags.sh
$@
1614 tags TAGS cscope gtags
: FORCE
1617 # Scripts to check various things for consistency
1618 # ---------------------------------------------------------------------------
1620 PHONY
+= includecheck versioncheck coccicheck namespacecheck export_report
1623 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1624 -name
'*.[hcS]' -type f
-print |
sort \
1625 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1628 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1629 -name
'*.[hcS]' -type f
-print |
sort \
1630 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1633 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/$@
1636 $(PERL
) $(srctree
)/scripts
/namespace.pl
1639 $(PERL
) $(srctree
)/scripts
/export_report.pl
1641 endif #ifeq ($(config-targets),1)
1642 endif #ifeq ($(mixed-targets),1)
1644 PHONY
+= checkstack kernelrelease kernelversion image_name
1646 # UML needs a little special treatment here. It wants to use the host
1647 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1648 # else wants $(ARCH), including people doing cross-builds, which means
1649 # that $(SUBARCH) doesn't work here.
1651 CHECKSTACK_ARCH
:= $(SUBARCH
)
1653 CHECKSTACK_ARCH
:= $(ARCH
)
1656 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1657 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1660 @echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1663 @echo
$(KERNELVERSION
)
1666 @echo
$(KBUILD_IMAGE
)
1668 # Clear a bunch of variables before executing the submake
1670 $(Q
)mkdir
-p
$(objtree
)/tools
1671 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O
=$(shell cd
$(objtree
) && /bin
/pwd
) subdir
=tools
-C
$(src
)/tools
/
1674 $(Q
)mkdir
-p
$(objtree
)/tools
1675 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O
=$(shell cd
$(objtree
) && /bin
/pwd
) subdir
=tools
-C
$(src
)/tools
/ $*
1678 # ---------------------------------------------------------------------------
1679 # Single targets are compatible with:
1680 # - build with mixed source and output
1681 # - build with separate output dir 'make O=...'
1682 # - external modules
1684 # target-dir => where to store outputfile
1685 # build-dir => directory in kernel source tree to use
1687 ifeq ($(KBUILD_EXTMOD
),)
1688 build-dir
= $(patsubst %/,%,$(dir $@
))
1689 target-dir
= $(dir $@
)
1691 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1692 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1693 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1696 %.s
: %.c prepare scripts FORCE
1697 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1698 %.i
: %.c prepare scripts FORCE
1699 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1700 %.o
: %.c prepare scripts FORCE
1701 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1702 %.lst
: %.c prepare scripts FORCE
1703 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1704 %.s
: %.S prepare scripts FORCE
1705 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1706 %.o
: %.S prepare scripts FORCE
1707 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1708 %.symtypes
: %.c prepare scripts FORCE
1709 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1710 %.ll
: %.c prepare scripts FORCE
1711 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1714 /: prepare scripts FORCE
1716 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1717 $(build
)=$(build-dir
)
1718 # Make sure the latest headers are built for Documentation
1719 Documentation
/ samples
/: headers_install
1720 %/: prepare scripts FORCE
1722 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1723 $(build
)=$(build-dir
)
1724 %.ko
: prepare scripts FORCE
1726 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1727 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1728 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1730 # FIXME Should go into a make.lib or something
1731 # ===========================================================================
1733 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1734 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1736 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1737 cmd_rmfiles
= rm -f
$(rm-files
)
1739 # Run depmod only if we have System.map and depmod is executable
1740 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1741 cmd_depmod
= $(CONFIG_SHELL
) $(srctree
)/scripts
/depmod.sh
$(DEPMOD
) \
1742 $(KERNELRELEASE
) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1744 # Create temporary dir for module support files
1745 # clean it up only when building all modules
1746 cmd_crmodverdir
= $(Q
)mkdir
-p
$(MODVERDIR
) \
1747 $(if
$(KBUILD_MODULES
),; rm -f
$(MODVERDIR
)/*)
1749 # read all saved command lines
1751 targets
:= $(wildcard $(sort $(targets
)))
1752 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1754 ifneq ($(cmd_files
),)
1755 $(cmd_files
): ; # Do not try to update included dependency files
1756 include $(cmd_files
)
1759 endif # skip-makefile
1764 # Declare the contents of the .PHONY variable as phony. We keep that
1765 # information in a variable so we can use it in if_changed and friends.