5 NAME
= Shuffling Zombie Juror
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 mkdir
-p
$(KBUILD_OUTPUT
) && cd
$(KBUILD_OUTPUT
) \
125 $(if
$(KBUILD_OUTPUT
),, \
126 $(error failed to create output directory
"$(saved-output)"))
128 PHONY
+= $(MAKECMDGOALS
) sub-make
130 $(filter-out _all sub-make
$(CURDIR
)/Makefile
, $(MAKECMDGOALS
)) _all
: sub-make
134 $(if
$(KBUILD_VERBOSE
:1=),@
)$(MAKE
) -C
$(KBUILD_OUTPUT
) \
135 KBUILD_SRC
=$(CURDIR
) \
136 KBUILD_EXTMOD
="$(KBUILD_EXTMOD)" -f
$(CURDIR
)/Makefile \
137 $(filter-out _all sub-make
,$(MAKECMDGOALS
))
139 # Leave processing to above invocation of make
141 endif # ifneq ($(KBUILD_OUTPUT),)
142 endif # ifeq ($(KBUILD_SRC),)
144 # We process the rest of the Makefile if this is the final invocation of make
145 ifeq ($(skip-makefile
),)
147 # If building an external module we do not care about the all: rule
148 # but instead _all depend on modules
150 ifeq ($(KBUILD_EXTMOD
),)
156 srctree
:= $(if
$(KBUILD_SRC
),$(KBUILD_SRC
),$(CURDIR
))
161 VPATH
:= $(srctree
)$(if
$(KBUILD_EXTMOD
),:$(KBUILD_EXTMOD
))
163 export srctree objtree VPATH
166 # SUBARCH tells the usermode build what the underlying arch is. That is set
167 # first, and if a usermode build is happening, the "ARCH=um" on the command
168 # line overrides the setting of ARCH below. If a native build is happening,
169 # then ARCH is assigned, getting whatever value it gets normally, and
170 # SUBARCH is subsequently ignored.
172 SUBARCH
:= $(shell uname
-m | sed
-e s
/i
.86/x86
/ -e s
/x86_64
/x86
/ \
173 -e s
/sun4u
/sparc64
/ \
174 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
175 -e s
/s390x
/s390
/ -e s
/parisc64
/parisc
/ \
176 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
177 -e s
/sh
[234].
*/sh
/ -e s
/aarch64.
*/arm64
/ )
179 # Cross compiling and selecting different set of gcc/bin-utils
180 # ---------------------------------------------------------------------------
182 # When performing cross compilation for other architectures ARCH shall be set
183 # to the target architecture. (See arch/* for the possibilities).
184 # ARCH can be set during invocation of make:
186 # Another way is to have ARCH set in the environment.
187 # The default ARCH is the host where make is executed.
189 # CROSS_COMPILE specify the prefix used for all executables used
190 # during compilation. Only gcc and related bin-utils executables
191 # are prefixed with $(CROSS_COMPILE).
192 # CROSS_COMPILE can be set on the command line
193 # make CROSS_COMPILE=ia64-linux-
194 # Alternatively CROSS_COMPILE can be set in the environment.
195 # A third alternative is to store a setting in .config so that plain
196 # "make" in the configured kernel build directory always uses that.
197 # Default value for CROSS_COMPILE is not to prefix executables
198 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
200 CROSS_COMPILE ?
= $(CONFIG_CROSS_COMPILE
:"%"=%)
202 # Architecture as present in compile.h
203 UTS_MACHINE
:= $(ARCH
)
206 # Additional ARCH settings for x86
210 ifeq ($(ARCH
),x86_64
)
214 # Additional ARCH settings for sparc
215 ifeq ($(ARCH
),sparc32
)
218 ifeq ($(ARCH
),sparc64
)
222 # Additional ARCH settings for sh
227 # Additional ARCH settings for tile
228 ifeq ($(ARCH
),tilepro
)
231 ifeq ($(ARCH
),tilegx
)
235 # Where to locate arch specific headers
236 hdr-arch
:= $(SRCARCH
)
238 KCONFIG_CONFIG ?
= .config
239 export KCONFIG_CONFIG
241 # SHELL used by kbuild
242 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
243 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
244 else echo sh
; fi
; fi
)
248 HOSTCFLAGS
= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2
-fomit-frame-pointer
251 # Decide whether to build built-in, modular, or both.
252 # Normally, just do built-in.
257 # If we have only "make modules", don't compile built-in objects.
258 # When we're building modules with modversions, we need to consider
259 # the built-in objects during the descend as well, in order to
260 # make sure the checksums are up to date before we record them.
262 ifeq ($(MAKECMDGOALS
),modules
)
263 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
266 # If we have "make <whatever> modules", compile modules
267 # in addition to whatever we do anyway.
268 # Just "make" or "make all" shall build modules as well
270 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
274 ifeq ($(MAKECMDGOALS
),)
278 export KBUILD_MODULES KBUILD_BUILTIN
279 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
282 # ---------------------------------------------------------------------------
284 # Normally, we echo the whole command before executing it. By making
285 # that echo $($(quiet)$(cmd)), we now have the possibility to set
286 # $(quiet) to choose other forms of output instead, e.g.
288 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
289 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
291 # If $(quiet) is empty, the whole command will be printed.
292 # If it is set to "quiet_", only the short version will be printed.
293 # If it is set to "silent_", nothing will be printed at all, since
294 # the variable $(silent_cmd_cc_o_c) doesn't exist.
296 # A simple variant is to prefix commands with $(Q) - that's useful
297 # for commands that shall be hidden in non-verbose mode.
301 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
302 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
304 ifeq ($(KBUILD_VERBOSE
),1)
312 # If the user is running make -s (silent mode), suppress echoing of
315 ifneq ($(filter 4.
%,$(MAKE_VERSION
)),) # make-4
316 ifneq ($(filter %s
,$(firstword x
$(MAKEFLAGS
))),)
320 ifneq ($(filter s
% -s
%,$(MAKEFLAGS
)),)
325 export quiet Q KBUILD_VERBOSE
328 # Look for make include files relative to root of kernel src
329 MAKEFLAGS
+= --include-dir
=$(srctree
)
331 # We need some generic definitions (do not try to remake the file).
332 $(srctree
)/scripts
/Kbuild.
include: ;
333 include $(srctree
)/scripts
/Kbuild.
include
335 # Make variables (CC, etc...)
337 AS
= $(CROSS_COMPILE
)as
338 LD
= $(CROSS_COMPILE
)ld
339 CC
= $(CROSS_COMPILE
)gcc
341 AR
= $(CROSS_COMPILE
)ar
342 NM
= $(CROSS_COMPILE
)nm
343 STRIP
= $(CROSS_COMPILE
)strip
344 OBJCOPY
= $(CROSS_COMPILE
)objcopy
345 OBJDUMP
= $(CROSS_COMPILE
)objdump
347 GENKSYMS
= scripts
/genksyms
/genksyms
348 INSTALLKERNEL
:= installkernel
349 DEPMOD
= /sbin
/depmod
353 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
354 -Wbitwise
-Wno-return-void
$(CF
)
360 CFLAGS_GCOV
= -fprofile-arcs
-ftest-coverage
363 # Use USERINCLUDE when you must reference the UAPI directories only.
365 -I
$(srctree
)/arch
/$(hdr-arch
)/include/uapi \
366 -Iarch
/$(hdr-arch
)/include/generated
/uapi \
367 -I
$(srctree
)/include/uapi \
368 -Iinclude
/generated
/uapi \
369 -include $(srctree
)/include/linux
/kconfig.h
371 # Use LINUXINCLUDE when you must reference the include/ directory.
372 # Needed to be compatible with the O= option
374 -I
$(srctree
)/arch
/$(hdr-arch
)/include \
375 -Iarch
/$(hdr-arch
)/include/generated \
376 $(if
$(KBUILD_SRC
), -I
$(srctree
)/include) \
380 KBUILD_CPPFLAGS
:= -D__KERNEL__
382 KBUILD_CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
383 -fno-strict-aliasing
-fno-common \
384 -Werror-implicit-function-declaration \
385 -Wno-format-security \
386 -fno-delete-null-pointer-checks
387 KBUILD_AFLAGS_KERNEL
:=
388 KBUILD_CFLAGS_KERNEL
:=
389 KBUILD_AFLAGS
:= -D__ASSEMBLY__
390 KBUILD_AFLAGS_MODULE
:= -DMODULE
391 KBUILD_CFLAGS_MODULE
:= -DMODULE
392 KBUILD_LDFLAGS_MODULE
:= -T
$(srctree
)/scripts
/module-common.lds
394 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
395 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
396 KERNELVERSION
= $(VERSION
)$(if
$(PATCHLEVEL
),.
$(PATCHLEVEL
)$(if
$(SUBLEVEL
),.
$(SUBLEVEL
)))$(EXTRAVERSION
)
398 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
399 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
400 export CPP AR NM STRIP OBJCOPY OBJDUMP
401 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
402 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
404 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
405 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
406 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
407 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
408 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
409 export KBUILD_ARFLAGS
411 # When compiling out-of-tree modules, put MODVERDIR in the module
412 # tree rather than in the kernel tree. The kernel tree might
414 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
416 # Files to ignore in find ... statements
418 RCS_FIND_IGNORE
:= \
( -name SCCS
-o
-name BitKeeper
-o
-name .svn
-o
-name CVS \
419 -o
-name .
pc -o
-name .hg
-o
-name .git \
) -prune
-o
420 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn \
421 --exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
423 # ===========================================================================
424 # Rules shared between *config targets and build targets
426 # Basic helpers built in scripts/
427 PHONY
+= scripts_basic
429 $(Q
)$(MAKE
) $(build
)=scripts
/basic
430 $(Q
)rm -f .tmp_quiet_recordmcount
432 # To avoid any implicit rule to kick in, define an empty command.
433 scripts
/basic
/%: scripts_basic
;
435 PHONY
+= outputmakefile
436 # outputmakefile generates a Makefile in the output directory, if using a
437 # separate output directory. This allows convenient use of make in the
440 ifneq ($(KBUILD_SRC
),)
441 $(Q
)ln
-fsn
$(srctree
) source
442 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
443 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
446 # Support for using generic headers in asm-generic
449 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.asm-generic \
450 src
=asm obj
=arch
/$(SRCARCH
)/include/generated
/asm
451 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.asm-generic \
452 src
=uapi
/asm obj
=arch
/$(SRCARCH
)/include/generated
/uapi
/asm
454 # To make sure we do not include .config for any of the *config targets
455 # catch them early, and hand them over to scripts/kconfig/Makefile
456 # It is allowed to specify more targets when calling make, including
457 # mixing *config targets and build targets.
458 # For example 'make oldconfig all'.
459 # Detect when mixed targets is specified, and make a second invocation
460 # of make so .config is not included in this case either (for *config).
462 version_h
:= include/generated
/uapi
/linux
/version.h
464 no-dot-config-targets
:= clean mrproper
distclean \
465 cscope gtags TAGS
tags help
%docs
check% coccicheck \
466 $(version_h
) headers_
% archheaders archscripts \
467 kernelversion
%src-pkg
473 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
474 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
479 ifeq ($(KBUILD_EXTMOD
),)
480 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
482 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
488 ifeq ($(mixed-targets
),1)
489 # ===========================================================================
490 # We're called with mixed targets (*config and build targets).
491 # Handle them one by one.
494 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
497 ifeq ($(config-targets
),1)
498 # ===========================================================================
499 # *config targets only - make sure prerequisites are updated, and descend
500 # in scripts/kconfig to make the *config target
502 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
503 # KBUILD_DEFCONFIG may point out an alternative default configuration
504 # used for 'make defconfig'
505 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
506 export KBUILD_DEFCONFIG KBUILD_KCONFIG
508 config
: scripts_basic outputmakefile FORCE
509 $(Q
)mkdir
-p
include/linux
include/config
510 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
512 %config
: scripts_basic outputmakefile FORCE
513 $(Q
)mkdir
-p
include/linux
include/config
514 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
517 # ===========================================================================
518 # Build targets only - this includes vmlinux, arch specific targets, clean
519 # targets and others. In general all targets except *config targets.
521 ifeq ($(KBUILD_EXTMOD
),)
522 # Additional helpers built in scripts/
523 # Carefully list dependencies so we do not try to build scripts twice
526 scripts
: scripts_basic
include/config
/auto.conf
include/config
/tristate.conf \
528 $(Q
)$(MAKE
) $(build
)=$(@
)
530 # Objects we will link into vmlinux / subdirs we need to visit
532 drivers-y
:= drivers
/ sound
/ firmware
/
536 endif # KBUILD_EXTMOD
538 ifeq ($(dot-config
),1)
540 -include include/config
/auto.conf
542 ifeq ($(KBUILD_EXTMOD
),)
543 # Read in dependencies to all Kconfig* files, make sure to run
544 # oldconfig if changes are detected.
545 -include include/config
/auto.conf.cmd
547 # To avoid any implicit rule to kick in, define an empty command
548 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
550 # If .config is newer than include/config/auto.conf, someone tinkered
551 # with it and forgot to run make oldconfig.
552 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
553 # we execute the config step to be sure to catch updated Kconfig files
554 include/config
/%.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
555 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
557 # external modules needs include/generated/autoconf.h and include/config/auto.conf
558 # but do not care if they are up-to-date. Use auto.conf to trigger the test
559 PHONY
+= include/config
/auto.conf
561 include/config
/auto.conf
:
562 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
564 echo
>&2 " ERROR: Kernel configuration is invalid."; \
565 echo
>&2 " include/generated/autoconf.h or $@ are missing.";\
566 echo
>&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
570 endif # KBUILD_EXTMOD
573 # Dummy target needed, because used as prerequisite
574 include/config
/auto.conf
: ;
575 endif # $(dot-config)
577 # The all: target is the default when no target is given on the
579 # This allow a user to issue only 'make' to build a kernel including modules
580 # Defaults to vmlinux, but the arch makefile usually adds further targets
583 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
584 KBUILD_CFLAGS
+= -Os
$(call cc-disable-warning
,maybe-uninitialized
,)
589 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
591 ifdef CONFIG_READABLE_ASM
592 # Disable optimizations that make assembler listings hard to read.
593 # reorder blocks reorders the control in the function
594 # ipa clone creates specialized cloned functions
595 # partial inlining inlines only parts of functions
596 KBUILD_CFLAGS
+= $(call cc-option
,-fno-reorder-blocks
,) \
597 $(call cc-option
,-fno-ipa-cp-clone
,) \
598 $(call cc-option
,-fno-partial-inlining
)
601 ifneq ($(CONFIG_FRAME_WARN
),0)
602 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
605 # Handle stack protector mode.
606 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
607 stackp-flag
:= -fstack-protector
608 ifeq ($(call cc-option
, $(stackp-flag
)),)
609 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR
: \
610 -fstack-protector not supported by compiler
)
613 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
614 stackp-flag
:= -fstack-protector-strong
615 ifeq ($(call cc-option
, $(stackp-flag
)),)
616 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG
: \
617 -fstack-protector-strong not supported by compiler
)
620 # Force off for distro compilers that enable stack protector by default.
621 stackp-flag
:= $(call cc-option
, -fno-stack-protector
)
624 KBUILD_CFLAGS
+= $(stackp-flag
)
626 # This warning generated too much noise in a regular build.
627 # Use make W=1 to enable this warning (see scripts/Makefile.build)
628 KBUILD_CFLAGS
+= $(call cc-disable-warning
, unused-but-set-variable
)
630 ifdef CONFIG_FRAME_POINTER
631 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
633 # Some targets (ARM with Thumb2, for example), can't be built with frame
634 # pointers. For those, we don't have FUNCTION_TRACER automatically
635 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
636 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
637 # -fomit-frame-pointer with FUNCTION_TRACER.
638 ifndef CONFIG_FUNCTION_TRACER
639 KBUILD_CFLAGS
+= -fomit-frame-pointer
643 ifdef CONFIG_DEBUG_INFO
645 KBUILD_AFLAGS
+= -Wa
,--gdwarf-2
648 ifdef CONFIG_DEBUG_INFO_REDUCED
649 KBUILD_CFLAGS
+= $(call cc-option
, -femit-struct-debug-baseonly
) \
650 $(call cc-option
,-fno-var-tracking
)
653 ifdef CONFIG_FUNCTION_TRACER
654 ifdef CONFIG_HAVE_FENTRY
655 CC_USING_FENTRY
:= $(call cc-option
, -mfentry
-DCC_USING_FENTRY
)
657 KBUILD_CFLAGS
+= -pg
$(CC_USING_FENTRY
)
658 KBUILD_AFLAGS
+= $(CC_USING_FENTRY
)
659 ifdef CONFIG_DYNAMIC_FTRACE
660 ifdef CONFIG_HAVE_C_RECORDMCOUNT
661 BUILD_C_RECORDMCOUNT
:= y
662 export BUILD_C_RECORDMCOUNT
667 # We trigger additional mismatches with less inlining
668 ifdef CONFIG_DEBUG_SECTION_MISMATCH
669 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
672 # arch Makefile may override CC so keep this after arch Makefile is included
673 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
674 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
676 # warn about C99 declaration after statement
677 KBUILD_CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
679 # disable pointer signed / unsigned warnings in gcc 4.0
680 KBUILD_CFLAGS
+= $(call cc-disable-warning
, pointer-sign
)
682 # disable invalid "can't wrap" optimizations for signed / pointers
683 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
685 # conserve stack if available
686 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
688 # disallow errors like 'EXPORT_GPL(foo);' with missing header
689 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=implicit-int
)
691 # require functions to have arguments in prototypes, not empty 'int foo()'
692 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=strict-prototypes
)
694 # Prohibit date/time macros, which would make the build non-deterministic
695 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=date-time
)
697 # use the deterministic mode of AR if available
698 KBUILD_ARFLAGS
:= $(call ar-option
,D
)
700 # check for 'asm goto'
701 ifeq ($(shell $(CONFIG_SHELL
) $(srctree
)/scripts
/gcc-goto.sh
$(CC
)), y
)
702 KBUILD_CFLAGS
+= -DCC_HAVE_ASM_GOTO
705 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
706 KBUILD_CPPFLAGS
+= $(KCPPFLAGS
)
707 KBUILD_AFLAGS
+= $(KAFLAGS
)
708 KBUILD_CFLAGS
+= $(KCFLAGS
)
710 # Use --build-id when available.
711 LDFLAGS_BUILD_ID
= $(patsubst -Wl
$(comma
)%,%,\
712 $(call cc-ldoption
, -Wl
$(comma
)--build-id
,))
713 KBUILD_LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
714 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
716 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
717 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
720 # Default kernel image to build when no specific target is given.
721 # KBUILD_IMAGE may be overruled on the command line or
722 # set in the environment
723 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
725 export KBUILD_IMAGE ?
= vmlinux
728 # INSTALL_PATH specifies where to place the updated kernel and system map
729 # images. Default is /boot, but you can set it to other values
730 export INSTALL_PATH ?
= /boot
733 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
734 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
735 # an argument if needed. Otherwise it defaults to the kernel install path
737 export INSTALL_DTBS_PATH ?
= $(INSTALL_PATH
)/dtbs
/$(KERNELRELEASE
)
740 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
741 # relocations required by build roots. This is not defined in the
742 # makefile but the argument can be passed to make if needed.
745 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
749 # INSTALL_MOD_STRIP, if defined, will cause modules to be
750 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
751 # the default option --strip-debug will be used. Otherwise,
752 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
754 ifdef INSTALL_MOD_STRIP
755 ifeq ($(INSTALL_MOD_STRIP
),1)
756 mod_strip_cmd
= $(STRIP
) --strip-debug
758 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
759 endif # INSTALL_MOD_STRIP=1
762 endif # INSTALL_MOD_STRIP
765 # Select initial ramdisk compression format, default is gzip(1).
766 # This shall be used by the dracut(8) tool while creating an initramfs image.
768 INITRD_COMPRESS-y
:= gzip
769 INITRD_COMPRESS-
$(CONFIG_RD_BZIP2
) := bzip2
770 INITRD_COMPRESS-
$(CONFIG_RD_LZMA
) := lzma
771 INITRD_COMPRESS-
$(CONFIG_RD_XZ
) := xz
772 INITRD_COMPRESS-
$(CONFIG_RD_LZO
) := lzo
773 INITRD_COMPRESS-
$(CONFIG_RD_LZ4
) := lz4
774 # do not export INITRD_COMPRESS, since we didn't actually
775 # choose a sane default compression above.
776 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
778 ifdef CONFIG_MODULE_SIG_ALL
779 MODSECKEY
= .
/signing_key.priv
780 MODPUBKEY
= .
/signing_key.x509
782 mod_sign_cmd
= perl
$(srctree
)/scripts
/sign-file
$(CONFIG_MODULE_SIG_HASH
) $(MODSECKEY
) $(MODPUBKEY
)
789 ifeq ($(KBUILD_EXTMOD
),)
790 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
792 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
793 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
794 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
796 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
798 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
799 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
801 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
802 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
803 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
804 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
805 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
806 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
807 libs-y
:= $(libs-y1
) $(libs-y2
)
809 # Externally visible symbols (used by link-vmlinux.sh)
810 export KBUILD_VMLINUX_INIT
:= $(head-y
) $(init-y
)
811 export KBUILD_VMLINUX_MAIN
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
812 export KBUILD_LDS
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
813 export LDFLAGS_vmlinux
814 # used by scripts/pacmage/Makefile
815 export KBUILD_ALLDIRS
:= $(sort $(filter-out arch
/%,$(vmlinux-alldirs
)) arch Documentation
include samples scripts tools virt
)
817 vmlinux-deps
:= $(KBUILD_LDS
) $(KBUILD_VMLINUX_INIT
) $(KBUILD_VMLINUX_MAIN
)
819 # Final link of vmlinux
820 cmd_link-vmlinux
= $(CONFIG_SHELL
) $< $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
)
821 quiet_cmd_link-vmlinux
= LINK
$@
823 # Include targets which we want to
824 # execute if the rest of the kernel build went well.
825 vmlinux
: scripts
/link-vmlinux.sh
$(vmlinux-deps
) FORCE
826 ifdef CONFIG_HEADERS_CHECK
827 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
830 $(Q
)$(MAKE
) $(build
)=samples
832 ifdef CONFIG_BUILD_DOCSRC
833 $(Q
)$(MAKE
) $(build
)=Documentation
835 +$(call if_changed
,link-vmlinux
)
837 # The actual objects are generated when descending,
838 # make sure no implicit rule kicks in
839 $(sort $(vmlinux-deps
)): $(vmlinux-dirs
) ;
841 # Handle descending into subdirectories listed in $(vmlinux-dirs)
842 # Preset locale variables to speed up the build process. Limit locale
843 # tweaks to this spot to avoid wrong language settings when running
844 # make menuconfig etc.
845 # Error messages still appears in the original language
847 PHONY
+= $(vmlinux-dirs
)
848 $(vmlinux-dirs
): prepare scripts
849 $(Q
)$(MAKE
) $(build
)=$@
851 define filechk_kernel.release
852 echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
855 # Store (new) KERNELRELEASE string in include/config/kernel.release
856 include/config
/kernel.release
: include/config
/auto.conf FORCE
857 $(call filechk
,kernel.release
)
860 # Things we need to do before we recursively start building the kernel
861 # or the modules are listed in "prepare".
862 # A multi level approach is used. prepareN is processed before prepareN-1.
863 # archprepare is used in arch Makefiles and when processed asm symlink,
864 # version.h and scripts_basic is processed / created.
866 # Listed in dependency order
867 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
869 # prepare3 is used to check if we are building in a separate output directory,
871 # 1) Check that make has not been executed in the kernel src $(srctree)
872 prepare3
: include/config
/kernel.release
873 ifneq ($(KBUILD_SRC
),)
874 @
$(kecho
) ' Using $(srctree) as source for kernel'
875 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
876 echo
>&2 " $(srctree) is not clean, please run 'make mrproper'"; \
877 echo
>&2 " in the '$(srctree)' directory.";\
882 # prepare2 creates a makefile if using a separate output directory
883 prepare2
: prepare3 outputmakefile asm-generic
885 prepare1
: prepare2
$(version_h
) include/generated
/utsrelease.h \
886 include/config
/auto.conf
889 archprepare
: archheaders archscripts prepare1 scripts_basic
891 prepare0
: archprepare FORCE
892 $(Q
)$(MAKE
) $(build
)=.
894 # All the preparing..
897 # Generate some files
898 # ---------------------------------------------------------------------------
900 # KERNELRELEASE can change from a few different places, meaning version.h
901 # needs to be updated, so this check is forced on all builds
904 define filechk_utsrelease.h
905 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
906 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
909 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
912 define filechk_version.h
913 (echo \
#define LINUX_VERSION_CODE $(shell \
914 expr
$(VERSION
) \
* 65536 + 0$(PATCHLEVEL
) \
* 256 + 0$(SUBLEVEL
)); \
915 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
918 $(version_h
): $(srctree
)/Makefile FORCE
919 $(call filechk
,version.h
)
921 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
922 $(call filechk
,utsrelease.h
)
926 $(Q
)find
$(srctree
)/include/ -name
'*.h' | xargs
--max-args
1 \
927 $(srctree
)/scripts
/headerdep.pl
-I
$(srctree
)/include
929 # ---------------------------------------------------------------------------
933 @echo
'*** Warning: make $@ is unnecessary now.'
935 # ---------------------------------------------------------------------------
937 INSTALL_FW_PATH
=$(INSTALL_MOD_PATH
)/lib
/firmware
938 export INSTALL_FW_PATH
940 PHONY
+= firmware_install
941 firmware_install
: FORCE
942 @mkdir
-p
$(objtree
)/firmware
943 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_install
945 # ---------------------------------------------------------------------------
948 #Default location for installed headers
949 export INSTALL_HDR_PATH
= $(objtree
)/usr
951 hdr-inst
:= -rR
-f
$(srctree
)/scripts
/Makefile.headersinst obj
953 # If we do an all arch process set dst to asm-$(hdr-arch)
954 hdr-dst
= $(if
$(KBUILD_HEADERS
), dst
=include/asm-
$(hdr-arch
), dst
=include/asm
)
963 __headers
: $(version_h
) scripts_basic asm-generic archheaders archscripts FORCE
964 $(Q
)$(MAKE
) $(build
)=scripts build_unifdef
966 PHONY
+= headers_install_all
968 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
install
970 PHONY
+= headers_install
971 headers_install
: __headers
972 $(if
$(wildcard $(srctree
)/arch
/$(hdr-arch
)/include/uapi
/asm
/Kbuild
),, \
973 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
974 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi
975 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/uapi
/asm
$(hdr-dst
)
977 PHONY
+= headers_check_all
978 headers_check_all
: headers_install_all
979 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
check
981 PHONY
+= headers_check
982 headers_check
: headers_install
983 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi HDRCHECK
=1
984 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/uapi
/asm
$(hdr-dst
) HDRCHECK
=1
986 # ---------------------------------------------------------------------------
991 # By default, build modules as well
997 # A module can be listed more than once in obj-m resulting in
998 # duplicate lines in modules.order files. Those are removed
999 # using awk while concatenating to the final file.
1002 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
) modules.builtin
1003 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.order
) > $(objtree
)/modules.order
1004 @
$(kecho
) ' Building modules, stage 2.';
1005 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1006 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modbuild
1008 modules.builtin
: $(vmlinux-dirs
:%=%/modules.builtin
)
1009 $(Q
)$(AWK
) '!x[$$0]++' $^
> $(objtree
)/modules.builtin
1011 %/modules.builtin
: include/config
/auto.conf
1012 $(Q
)$(MAKE
) $(modbuiltin
)=$*
1015 # Target to prepare building external modules
1016 PHONY
+= modules_prepare
1017 modules_prepare
: prepare scripts
1019 # Target to install modules
1020 PHONY
+= modules_install
1021 modules_install
: _modinst_ _modinst_post
1025 @
rm -rf
$(MODLIB
)/kernel
1026 @
rm -f
$(MODLIB
)/source
1027 @mkdir
-p
$(MODLIB
)/kernel
1028 @ln
-s
$(srctree
) $(MODLIB
)/source
1029 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1030 rm -f
$(MODLIB
)/build
; \
1031 ln
-s
$(objtree
) $(MODLIB
)/build
; \
1033 @cp
-f
$(objtree
)/modules.order
$(MODLIB
)/
1034 @cp
-f
$(objtree
)/modules.builtin
$(MODLIB
)/
1035 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1037 # This depmod is only for convenience to give the initial
1038 # boot a modules.dep even before / is mounted read-write. However the
1039 # boot script depmod is the master version.
1040 PHONY
+= _modinst_post
1041 _modinst_post
: _modinst_
1042 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modinst
1045 ifeq ($(CONFIG_MODULE_SIG
), y
)
1046 PHONY
+= modules_sign
1048 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modsign
1051 else # CONFIG_MODULES
1053 # Modules not configured
1054 # ---------------------------------------------------------------------------
1056 modules modules_install
: FORCE
1058 @echo
>&2 "The present kernel configuration has modules disabled."
1059 @echo
>&2 "Type 'make config' and enable loadable module support."
1060 @echo
>&2 "Then build a kernel with module support enabled."
1064 endif # CONFIG_MODULES
1067 # Cleaning is done on three levels.
1068 # make clean Delete most generated files
1069 # Leave enough to build external modules
1070 # make mrproper Delete the current configuration, and all generated files
1071 # make distclean Remove editor backup files, patch leftover files and the like
1073 # Directories & files removed with 'make clean'
1074 CLEAN_DIRS
+= $(MODVERDIR
)
1076 # Directories & files removed with 'make mrproper'
1077 MRPROPER_DIRS
+= include/config usr
/include include/generated \
1078 arch
/*/include/generated
1079 MRPROPER_FILES
+= .config .config.old .version .old_version
$(version_h
) \
1080 Module.symvers
tags TAGS cscope
* GPATH GTAGS GRTAGS GSYMS \
1081 signing_key.priv signing_key.x509 x509.genkey \
1082 extra_certificates signing_key.x509.keyid \
1083 signing_key.x509.signer
include/linux
/version.h
1085 # clean - Delete most, but leave enough to build external modules
1087 clean: rm-dirs
:= $(CLEAN_DIRS
)
1088 clean: rm-files
:= $(CLEAN_FILES
)
1089 clean-dirs
:= $(addprefix _clean_
, .
$(vmlinux-alldirs
) Documentation samples
)
1091 PHONY
+= $(clean-dirs
) clean archclean vmlinuxclean
1093 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1096 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/link-vmlinux.sh
clean
1098 clean: archclean vmlinuxclean
1100 # mrproper - Delete all generated files, including .config
1102 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1103 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1104 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
1106 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1108 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1110 mrproper
: clean archmrproper
$(mrproper-dirs
)
1119 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1120 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1121 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1122 -o
-name
'.*.rej' -o
-name
'*%' -o
-name
'core' \
) \
1123 -type f
-print | xargs
rm -f
1126 # Packaging of the kernel to various formats
1127 # ---------------------------------------------------------------------------
1128 # rpm target kept for backward compatibility
1129 package-dir
:= $(srctree
)/scripts
/package
1132 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1133 %pkg
: include/config
/kernel.release FORCE
1134 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1135 rpm
: include/config
/kernel.release FORCE
1136 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1139 # Brief documentation of the typical targets used
1140 # ---------------------------------------------------------------------------
1142 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1143 boards
:= $(notdir $(boards
))
1144 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1145 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1148 @echo
'Cleaning targets:'
1149 @echo
' clean - Remove most generated files but keep the config and'
1150 @echo
' enough build support to build external modules'
1151 @echo
' mrproper - Remove all generated files + config + various backup files'
1152 @echo
' distclean - mrproper + remove editor backup and patch files'
1154 @echo
'Configuration targets:'
1155 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1157 @echo
'Other generic targets:'
1158 @echo
' all - Build all targets marked with [*]'
1159 @echo
'* vmlinux - Build the bare kernel'
1160 @echo
'* modules - Build all modules'
1161 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1162 @echo
' firmware_install- Install all firmware to INSTALL_FW_PATH'
1163 @echo
' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1164 @echo
' dir/ - Build all files in dir and below'
1165 @echo
' dir/file.[oisS] - Build specified target only'
1166 @echo
' dir/file.lst - Build specified mixed source/assembly target only'
1167 @echo
' (requires a recent binutils and recent build (System.map))'
1168 @echo
' dir/file.ko - Build module including final link'
1169 @echo
' modules_prepare - Set up for building external modules'
1170 @echo
' tags/TAGS - Generate tags file for editors'
1171 @echo
' cscope - Generate cscope index'
1172 @echo
' gtags - Generate GNU GLOBAL index'
1173 @echo
' kernelrelease - Output the release version string'
1174 @echo
' kernelversion - Output the version stored in Makefile'
1175 @echo
' image_name - Output the image name'
1176 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1177 echo
' (default: $(INSTALL_HDR_PATH))'; \
1179 @echo
'Static analysers'
1180 @echo
' checkstack - Generate a list of stack hogs'
1181 @echo
' namespacecheck - Name space analysis on compiled kernel'
1182 @echo
' versioncheck - Sanity check on version.h usage'
1183 @echo
' includecheck - Check for duplicate included header files'
1184 @echo
' export_report - List the usages of all exported symbols'
1185 @echo
' headers_check - Sanity check on exported headers'
1186 @echo
' headerdep - Detect inclusion cycles in headers'
1187 @
$(MAKE
) -f
$(srctree
)/scripts
/Makefile.help checker-help
1189 @echo
'Kernel packaging:'
1190 @
$(MAKE
) $(build
)=$(package-dir
) help
1192 @echo
'Documentation targets:'
1193 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1195 @echo
'Architecture specific targets ($(SRCARCH)):'
1196 @
$(if
$(archhelp
),$(archhelp
),\
1197 echo
' No architecture specific help defined for $(SRCARCH)')
1200 $(foreach b
, $(boards
), \
1201 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1203 @
$(if
$(board-dirs
), \
1204 $(foreach b
, $(board-dirs
), \
1205 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1206 printf
" %-16s - Show all of the above\\n" help-boards
; \
1209 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1210 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1211 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1212 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1213 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1214 @echo
' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1215 @echo
' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1216 @echo
' 1: warnings which may be relevant and do not occur too often'
1217 @echo
' 2: warnings which occur quite often but may still be relevant'
1218 @echo
' 3: more obscure warnings, can most likely be ignored'
1219 @echo
' Multiple levels can be combined with W=12 or W=123'
1221 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1222 @echo
'For further info see the ./README file'
1225 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1227 help-boards
: $(help-board-dirs
)
1229 boards-per-dir
= $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
))
1231 $(help-board-dirs
): help-
%:
1232 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1233 @
$(if
$(boards-per-dir
), \
1234 $(foreach b
, $(boards-per-dir
), \
1235 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1239 # Documentation targets
1240 # ---------------------------------------------------------------------------
1241 %docs
: scripts_basic FORCE
1242 $(Q
)$(MAKE
) $(build
)=scripts build_docproc
1243 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1245 else # KBUILD_EXTMOD
1248 # External module support.
1249 # When building external modules the kernel used as basis is considered
1250 # read-only, and no consistency checks are made and the make
1251 # system is not used on the basis kernel. If updates are required
1252 # in the basis kernel ordinary make commands (without M=...) must
1255 # The following are the only valid targets when building external
1257 # make M=dir clean Delete all automatically generated files
1258 # make M=dir modules Make all modules in specified dir
1259 # make M=dir Same as 'make M=dir modules'
1260 # make M=dir modules_install
1261 # Install the modules built in the module directory
1262 # Assumes install directory is already created
1264 # We are always building modules
1266 PHONY
+= crmodverdir
1270 PHONY
+= $(objtree
)/Module.symvers
1271 $(objtree
)/Module.symvers
:
1272 @
test -e
$(objtree
)/Module.symvers ||
( \
1274 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1275 echo
" is missing; modules will have no dependencies and modversions."; \
1278 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1279 PHONY
+= $(module-dirs
) modules
1280 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1281 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1283 modules
: $(module-dirs
)
1284 @
$(kecho
) ' Building modules, stage 2.';
1285 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1287 PHONY
+= modules_install
1288 modules_install
: _emodinst_ _emodinst_post
1290 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1293 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1294 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1296 PHONY
+= _emodinst_post
1297 _emodinst_post
: _emodinst_
1300 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1302 PHONY
+= $(clean-dirs
) clean
1304 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1306 clean: rm-dirs
:= $(MODVERDIR
)
1307 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers
1310 @echo
' Building external modules.'
1311 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1313 @echo
' modules - default target, build the module(s)'
1314 @echo
' modules_install - install the module'
1315 @echo
' clean - remove generated files in module directory only'
1319 PHONY
+= prepare scripts
1322 endif # KBUILD_EXTMOD
1324 clean: $(clean-dirs
)
1327 @find
$(if
$(KBUILD_EXTMOD
), $(KBUILD_EXTMOD
), .
) $(RCS_FIND_IGNORE
) \
1328 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1330 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1331 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1332 -o
-name modules.builtin
-o
-name
'.tmp_*.o.*' \
1333 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1335 # Generate tags for editors
1336 # ---------------------------------------------------------------------------
1337 quiet_cmd_tags
= GEN
$@
1338 cmd_tags
= $(CONFIG_SHELL
) $(srctree
)/scripts
/tags.sh
$@
1340 tags TAGS cscope gtags
: FORCE
1343 # Scripts to check various things for consistency
1344 # ---------------------------------------------------------------------------
1346 PHONY
+= includecheck versioncheck coccicheck namespacecheck export_report
1349 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1350 -name
'*.[hcS]' -type f
-print |
sort \
1351 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1354 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1355 -name
'*.[hcS]' -type f
-print |
sort \
1356 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1359 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/$@
1362 $(PERL
) $(srctree
)/scripts
/namespace.pl
1365 $(PERL
) $(srctree
)/scripts
/export_report.pl
1367 endif #ifeq ($(config-targets),1)
1368 endif #ifeq ($(mixed-targets),1)
1370 PHONY
+= checkstack kernelrelease kernelversion image_name
1372 # UML needs a little special treatment here. It wants to use the host
1373 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1374 # else wants $(ARCH), including people doing cross-builds, which means
1375 # that $(SUBARCH) doesn't work here.
1377 CHECKSTACK_ARCH
:= $(SUBARCH
)
1379 CHECKSTACK_ARCH
:= $(ARCH
)
1382 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1383 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1386 @echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1389 @echo
$(KERNELVERSION
)
1392 @echo
$(KBUILD_IMAGE
)
1394 # Clear a bunch of variables before executing the submake
1396 $(Q
)mkdir
-p
$(objtree
)/tools
1397 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(filter --j% -j,$(MAKEFLAGS))" O
=$(objtree
) subdir
=tools
-C
$(src
)/tools
/
1400 $(Q
)mkdir
-p
$(objtree
)/tools
1401 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(filter --j% -j,$(MAKEFLAGS))" O
=$(objtree
) subdir
=tools
-C
$(src
)/tools
/ $*
1404 # ---------------------------------------------------------------------------
1405 # Single targets are compatible with:
1406 # - build with mixed source and output
1407 # - build with separate output dir 'make O=...'
1408 # - external modules
1410 # target-dir => where to store outputfile
1411 # build-dir => directory in kernel source tree to use
1413 ifeq ($(KBUILD_EXTMOD
),)
1414 build-dir
= $(patsubst %/,%,$(dir $@
))
1415 target-dir
= $(dir $@
)
1417 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1418 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1419 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1422 %.s
: %.c prepare scripts FORCE
1423 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1424 %.i
: %.c prepare scripts FORCE
1425 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1426 %.o
: %.c prepare scripts FORCE
1427 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1428 %.lst
: %.c prepare scripts FORCE
1429 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1430 %.s
: %.S prepare scripts FORCE
1431 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1432 %.o
: %.S prepare scripts FORCE
1433 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1434 %.symtypes
: %.c prepare scripts FORCE
1435 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1438 /: prepare scripts FORCE
1440 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1441 $(build
)=$(build-dir
)
1442 %/: prepare scripts FORCE
1444 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1445 $(build
)=$(build-dir
)
1446 %.ko
: prepare scripts FORCE
1448 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1449 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1450 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1452 # FIXME Should go into a make.lib or something
1453 # ===========================================================================
1455 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1456 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1458 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1459 cmd_rmfiles
= rm -f
$(rm-files
)
1461 # Run depmod only if we have System.map and depmod is executable
1462 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1463 cmd_depmod
= $(CONFIG_SHELL
) $(srctree
)/scripts
/depmod.sh
$(DEPMOD
) \
1464 $(KERNELRELEASE
) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1466 # Create temporary dir for module support files
1467 # clean it up only when building all modules
1468 cmd_crmodverdir
= $(Q
)mkdir
-p
$(MODVERDIR
) \
1469 $(if
$(KBUILD_MODULES
),; rm -f
$(MODVERDIR
)/*)
1471 # read all saved command lines
1473 targets
:= $(wildcard $(sort $(targets
)))
1474 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1476 ifneq ($(cmd_files
),)
1477 $(cmd_files
): ; # Do not try to update included dependency files
1478 include $(cmd_files
)
1481 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1483 # $(Q)$(MAKE) $(clean)=dir
1484 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1486 endif # skip-makefile
1491 # Declare the contents of the .PHONY variable as phony. We keep that
1492 # information in a variable so we can use it in if_changed and friends.