5 NAME
= Terrified Chipmunk
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 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right.
28 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.o targets which finally
32 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which is in that other dir
36 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicitly listed as the
41 # To put more focus on warnings, be less verbose as default
42 # Use 'make V=1' to see the full commands
44 ifeq ("$(origin V)", "command line")
51 # Call a source code checker (by default, "sparse") as part of the
54 # Use 'make C=1' to enable checking of only re-compiled files.
55 # Use 'make C=2' to enable checking of *all* source files, regardless
56 # of whether they are re-compiled or not.
58 # See the file "Documentation/sparse.txt" for more details, including
59 # where to get the "sparse" utility.
61 ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC
= $(C
)
64 ifndef KBUILD_CHECKSRC
68 # Use make M=dir to specify directory of external module to build
69 # Old syntax make ... SUBDIRS=$PWD is still supported
70 # Setting the environment variable KBUILD_EXTMOD take precedence
72 KBUILD_EXTMOD ?
= $(SUBDIRS
)
75 ifeq ("$(origin M)", "command line")
79 # kbuild supports saving output files in a separate directory.
80 # To locate output files in a separate directory two syntaxes are supported.
81 # In both cases the working directory must be the root of the kernel src.
83 # Use "make O=dir/to/store/output/files/"
85 # 2) Set KBUILD_OUTPUT
86 # Set the environment variable KBUILD_OUTPUT to point to the directory
87 # where the output files shall be placed.
88 # export KBUILD_OUTPUT=dir/to/store/output/files/
91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
95 # KBUILD_SRC is set on invocation of make in OBJ directory
96 # KBUILD_SRC is not intended to be used by the regular user (for now)
99 # OK, Make called in directory where kernel src resides
100 # Do we want to locate output files in a separate directory?
101 ifeq ("$(origin O)", "command line")
102 KBUILD_OUTPUT
:= $(O
)
105 ifeq ("$(origin W)", "command line")
106 export KBUILD_ENABLE_EXTRA_GCC_CHECKS
:= $(W
)
109 # That's our default target when none is given on the command line
113 # Cancel implicit rules on top Makefile
114 $(CURDIR
)/Makefile Makefile
: ;
116 ifneq ($(KBUILD_OUTPUT
),)
117 # Invoke a second make in the output directory, passing relevant variables
118 # check that the output directory actually exists
119 saved-output
:= $(KBUILD_OUTPUT
)
120 KBUILD_OUTPUT
:= $(shell cd
$(KBUILD_OUTPUT
) && /bin
/pwd
)
121 $(if
$(KBUILD_OUTPUT
),, \
122 $(error output directory
"$(saved-output)" does not exist
))
124 PHONY
+= $(MAKECMDGOALS
) sub-make
126 $(filter-out _all sub-make
$(CURDIR
)/Makefile
, $(MAKECMDGOALS
)) _all
: sub-make
130 $(if
$(KBUILD_VERBOSE
:1=),@
)$(MAKE
) -C
$(KBUILD_OUTPUT
) \
131 KBUILD_SRC
=$(CURDIR
) \
132 KBUILD_EXTMOD
="$(KBUILD_EXTMOD)" -f
$(CURDIR
)/Makefile \
133 $(filter-out _all sub-make
,$(MAKECMDGOALS
))
135 # Leave processing to above invocation of make
137 endif # ifneq ($(KBUILD_OUTPUT),)
138 endif # ifeq ($(KBUILD_SRC),)
140 # We process the rest of the Makefile if this is the final invocation of make
141 ifeq ($(skip-makefile
),)
143 # If building an external module we do not care about the all: rule
144 # but instead _all depend on modules
146 ifeq ($(KBUILD_EXTMOD
),)
152 srctree
:= $(if
$(KBUILD_SRC
),$(KBUILD_SRC
),$(CURDIR
))
157 VPATH
:= $(srctree
)$(if
$(KBUILD_EXTMOD
),:$(KBUILD_EXTMOD
))
159 export srctree objtree VPATH
162 # SUBARCH tells the usermode build what the underlying arch is. That is set
163 # first, and if a usermode build is happening, the "ARCH=um" on the command
164 # line overrides the setting of ARCH below. If a native build is happening,
165 # then ARCH is assigned, getting whatever value it gets normally, and
166 # SUBARCH is subsequently ignored.
168 SUBARCH
:= $(shell uname
-m | sed
-e s
/i
.86/i386
/ -e s
/sun4u
/sparc64
/ \
169 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
170 -e s
/s390x
/s390
/ -e s
/parisc64
/parisc
/ \
171 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
174 # Cross compiling and selecting different set of gcc/bin-utils
175 # ---------------------------------------------------------------------------
177 # When performing cross compilation for other architectures ARCH shall be set
178 # to the target architecture. (See arch/* for the possibilities).
179 # ARCH can be set during invocation of make:
181 # Another way is to have ARCH set in the environment.
182 # The default ARCH is the host where make is executed.
184 # CROSS_COMPILE specify the prefix used for all executables used
185 # during compilation. Only gcc and related bin-utils executables
186 # are prefixed with $(CROSS_COMPILE).
187 # CROSS_COMPILE can be set on the command line
188 # make CROSS_COMPILE=ia64-linux-
189 # Alternatively CROSS_COMPILE can be set in the environment.
190 # A third alternative is to store a setting in .config so that plain
191 # "make" in the configured kernel build directory always uses that.
192 # Default value for CROSS_COMPILE is not to prefix executables
193 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
195 CROSS_COMPILE ?
= $(CONFIG_CROSS_COMPILE
:"%"=%)
197 # Architecture as present in compile.h
198 UTS_MACHINE
:= $(ARCH
)
201 # Additional ARCH settings for x86
205 ifeq ($(ARCH
),x86_64
)
209 # Additional ARCH settings for sparc
210 ifeq ($(ARCH
),sparc32
)
213 ifeq ($(ARCH
),sparc64
)
217 # Additional ARCH settings for sh
222 # Additional ARCH settings for tile
223 ifeq ($(ARCH
),tilepro
)
226 ifeq ($(ARCH
),tilegx
)
230 # Where to locate arch specific headers
231 hdr-arch
:= $(SRCARCH
)
233 KCONFIG_CONFIG ?
= .config
234 export KCONFIG_CONFIG
236 # SHELL used by kbuild
237 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
238 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
239 else echo sh
; fi
; fi
)
243 HOSTCFLAGS
= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2
-fomit-frame-pointer
246 # Decide whether to build built-in, modular, or both.
247 # Normally, just do built-in.
252 # If we have only "make modules", don't compile built-in objects.
253 # When we're building modules with modversions, we need to consider
254 # the built-in objects during the descend as well, in order to
255 # make sure the checksums are up to date before we record them.
257 ifeq ($(MAKECMDGOALS
),modules
)
258 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
261 # If we have "make <whatever> modules", compile modules
262 # in addition to whatever we do anyway.
263 # Just "make" or "make all" shall build modules as well
265 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
269 ifeq ($(MAKECMDGOALS
),)
273 export KBUILD_MODULES KBUILD_BUILTIN
274 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
277 # ---------------------------------------------------------------------------
279 # Normally, we echo the whole command before executing it. By making
280 # that echo $($(quiet)$(cmd)), we now have the possibility to set
281 # $(quiet) to choose other forms of output instead, e.g.
283 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
284 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
286 # If $(quiet) is empty, the whole command will be printed.
287 # If it is set to "quiet_", only the short version will be printed.
288 # If it is set to "silent_", nothing will be printed at all, since
289 # the variable $(silent_cmd_cc_o_c) doesn't exist.
291 # A simple variant is to prefix commands with $(Q) - that's useful
292 # for commands that shall be hidden in non-verbose mode.
296 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
297 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
299 ifeq ($(KBUILD_VERBOSE
),1)
307 # If the user is running make -s (silent mode), suppress echoing of
310 ifneq ($(filter s
% -s
%,$(MAKEFLAGS
)),)
314 export quiet Q KBUILD_VERBOSE
317 # Look for make include files relative to root of kernel src
318 MAKEFLAGS
+= --include-dir
=$(srctree
)
320 # We need some generic definitions (do not try to remake the file).
321 $(srctree
)/scripts
/Kbuild.
include: ;
322 include $(srctree
)/scripts
/Kbuild.
include
324 # Make variables (CC, etc...)
326 AS
= $(CROSS_COMPILE
)as
327 LD
= $(CROSS_COMPILE
)ld
328 CC
= $(CROSS_COMPILE
)gcc
330 AR
= $(CROSS_COMPILE
)ar
331 NM
= $(CROSS_COMPILE
)nm
332 STRIP
= $(CROSS_COMPILE
)strip
333 OBJCOPY
= $(CROSS_COMPILE
)objcopy
334 OBJDUMP
= $(CROSS_COMPILE
)objdump
336 GENKSYMS
= scripts
/genksyms
/genksyms
337 INSTALLKERNEL
:= installkernel
338 DEPMOD
= /sbin
/depmod
342 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
343 -Wbitwise
-Wno-return-void
$(CF
)
349 CFLAGS_GCOV
= -fprofile-arcs
-ftest-coverage
352 # Use USERINCLUDE when you must reference the UAPI directories only.
354 -I
$(srctree
)/arch
/$(hdr-arch
)/include/uapi \
355 -Iarch
/$(hdr-arch
)/include/generated
/uapi \
356 -I
$(srctree
)/include/uapi \
357 -Iinclude
/generated
/uapi \
358 -include $(srctree
)/include/linux
/kconfig.h
360 # Use LINUXINCLUDE when you must reference the include/ directory.
361 # Needed to be compatible with the O= option
363 -I
$(srctree
)/arch
/$(hdr-arch
)/include \
364 -Iarch
/$(hdr-arch
)/include/generated \
365 $(if
$(KBUILD_SRC
), -I
$(srctree
)/include) \
369 KBUILD_CPPFLAGS
:= -D__KERNEL__
371 KBUILD_CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
372 -fno-strict-aliasing
-fno-common \
373 -Werror-implicit-function-declaration \
374 -Wno-format-security \
375 -fno-delete-null-pointer-checks
376 KBUILD_AFLAGS_KERNEL
:=
377 KBUILD_CFLAGS_KERNEL
:=
378 KBUILD_AFLAGS
:= -D__ASSEMBLY__
379 KBUILD_AFLAGS_MODULE
:= -DMODULE
380 KBUILD_CFLAGS_MODULE
:= -DMODULE
381 KBUILD_LDFLAGS_MODULE
:= -T
$(srctree
)/scripts
/module-common.lds
383 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
384 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
385 KERNELVERSION
= $(VERSION
)$(if
$(PATCHLEVEL
),.
$(PATCHLEVEL
)$(if
$(SUBLEVEL
),.
$(SUBLEVEL
)))$(EXTRAVERSION
)
387 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
388 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
389 export CPP AR NM STRIP OBJCOPY OBJDUMP
390 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
391 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
393 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
394 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
395 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
396 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
397 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
398 export KBUILD_ARFLAGS
400 # When compiling out-of-tree modules, put MODVERDIR in the module
401 # tree rather than in the kernel tree. The kernel tree might
403 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
405 # Files to ignore in find ... statements
407 RCS_FIND_IGNORE
:= \
( -name SCCS
-o
-name BitKeeper
-o
-name .svn
-o
-name CVS \
408 -o
-name .
pc -o
-name .hg
-o
-name .git \
) -prune
-o
409 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn \
410 --exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
412 # ===========================================================================
413 # Rules shared between *config targets and build targets
415 # Basic helpers built in scripts/
416 PHONY
+= scripts_basic
418 $(Q
)$(MAKE
) $(build
)=scripts
/basic
419 $(Q
)rm -f .tmp_quiet_recordmcount
421 # To avoid any implicit rule to kick in, define an empty command.
422 scripts
/basic
/%: scripts_basic
;
424 PHONY
+= outputmakefile
425 # outputmakefile generates a Makefile in the output directory, if using a
426 # separate output directory. This allows convenient use of make in the
429 ifneq ($(KBUILD_SRC
),)
430 $(Q
)ln
-fsn
$(srctree
) source
431 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
432 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
435 # Support for using generic headers in asm-generic
438 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.asm-generic \
439 src
=asm obj
=arch
/$(SRCARCH
)/include/generated
/asm
440 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.asm-generic \
441 src
=uapi
/asm obj
=arch
/$(SRCARCH
)/include/generated
/uapi
/asm
443 # To make sure we do not include .config for any of the *config targets
444 # catch them early, and hand them over to scripts/kconfig/Makefile
445 # It is allowed to specify more targets when calling make, including
446 # mixing *config targets and build targets.
447 # For example 'make oldconfig all'.
448 # Detect when mixed targets is specified, and make a second invocation
449 # of make so .config is not included in this case either (for *config).
451 version_h
:= include/generated
/uapi
/linux
/version.h
453 no-dot-config-targets
:= clean mrproper
distclean \
454 cscope gtags TAGS
tags help
%docs
check% coccicheck \
455 $(version_h
) headers_
% archheaders archscripts \
456 kernelversion
%src-pkg
462 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
463 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
468 ifeq ($(KBUILD_EXTMOD
),)
469 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
471 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
477 ifeq ($(mixed-targets
),1)
478 # ===========================================================================
479 # We're called with mixed targets (*config and build targets).
480 # Handle them one by one.
483 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
486 ifeq ($(config-targets
),1)
487 # ===========================================================================
488 # *config targets only - make sure prerequisites are updated, and descend
489 # in scripts/kconfig to make the *config target
491 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
492 # KBUILD_DEFCONFIG may point out an alternative default configuration
493 # used for 'make defconfig'
494 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
495 export KBUILD_DEFCONFIG KBUILD_KCONFIG
497 config
: scripts_basic outputmakefile FORCE
498 $(Q
)mkdir
-p
include/linux
include/config
499 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
501 %config
: scripts_basic outputmakefile FORCE
502 $(Q
)mkdir
-p
include/linux
include/config
503 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
506 # ===========================================================================
507 # Build targets only - this includes vmlinux, arch specific targets, clean
508 # targets and others. In general all targets except *config targets.
510 ifeq ($(KBUILD_EXTMOD
),)
511 # Additional helpers built in scripts/
512 # Carefully list dependencies so we do not try to build scripts twice
515 scripts
: scripts_basic
include/config
/auto.conf
include/config
/tristate.conf
516 $(Q
)$(MAKE
) $(build
)=$(@
)
518 # Objects we will link into vmlinux / subdirs we need to visit
520 drivers-y
:= drivers
/ sound
/ firmware
/
524 endif # KBUILD_EXTMOD
526 ifeq ($(dot-config
),1)
528 -include include/config
/auto.conf
530 ifeq ($(KBUILD_EXTMOD
),)
531 # Read in dependencies to all Kconfig* files, make sure to run
532 # oldconfig if changes are detected.
533 -include include/config
/auto.conf.cmd
535 # To avoid any implicit rule to kick in, define an empty command
536 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
538 # If .config is newer than include/config/auto.conf, someone tinkered
539 # with it and forgot to run make oldconfig.
540 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
541 # we execute the config step to be sure to catch updated Kconfig files
542 include/config
/%.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
543 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
545 # external modules needs include/generated/autoconf.h and include/config/auto.conf
546 # but do not care if they are up-to-date. Use auto.conf to trigger the test
547 PHONY
+= include/config
/auto.conf
549 include/config
/auto.conf
:
550 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
552 echo
>&2 " ERROR: Kernel configuration is invalid."; \
553 echo
>&2 " include/generated/autoconf.h or $@ are missing.";\
554 echo
>&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
558 endif # KBUILD_EXTMOD
561 # Dummy target needed, because used as prerequisite
562 include/config
/auto.conf
: ;
563 endif # $(dot-config)
565 # The all: target is the default when no target is given on the
567 # This allow a user to issue only 'make' to build a kernel including modules
568 # Defaults to vmlinux, but the arch makefile usually adds further targets
571 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
577 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
579 ifdef CONFIG_READABLE_ASM
580 # Disable optimizations that make assembler listings hard to read.
581 # reorder blocks reorders the control in the function
582 # ipa clone creates specialized cloned functions
583 # partial inlining inlines only parts of functions
584 KBUILD_CFLAGS
+= $(call cc-option
,-fno-reorder-blocks
,) \
585 $(call cc-option
,-fno-ipa-cp-clone
,) \
586 $(call cc-option
,-fno-partial-inlining
)
589 ifneq ($(CONFIG_FRAME_WARN
),0)
590 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
593 # Force gcc to behave correct even for buggy distributions
594 ifndef CONFIG_CC_STACKPROTECTOR
595 KBUILD_CFLAGS
+= $(call cc-option
, -fno-stack-protector
)
598 # This warning generated too much noise in a regular build.
599 # Use make W=1 to enable this warning (see scripts/Makefile.build)
600 KBUILD_CFLAGS
+= $(call cc-disable-warning
, unused-but-set-variable
)
602 ifdef CONFIG_FRAME_POINTER
603 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
605 # Some targets (ARM with Thumb2, for example), can't be built with frame
606 # pointers. For those, we don't have FUNCTION_TRACER automatically
607 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
608 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
609 # -fomit-frame-pointer with FUNCTION_TRACER.
610 ifndef CONFIG_FUNCTION_TRACER
611 KBUILD_CFLAGS
+= -fomit-frame-pointer
615 ifdef CONFIG_DEBUG_INFO
617 KBUILD_AFLAGS
+= -gdwarf-2
620 ifdef CONFIG_DEBUG_INFO_REDUCED
621 KBUILD_CFLAGS
+= $(call cc-option
, -femit-struct-debug-baseonly
)
624 ifdef CONFIG_FUNCTION_TRACER
625 ifdef CONFIG_HAVE_FENTRY
626 CC_USING_FENTRY
:= $(call cc-option
, -mfentry
-DCC_USING_FENTRY
)
628 KBUILD_CFLAGS
+= -pg
$(CC_USING_FENTRY
)
629 KBUILD_AFLAGS
+= $(CC_USING_FENTRY
)
630 ifdef CONFIG_DYNAMIC_FTRACE
631 ifdef CONFIG_HAVE_C_RECORDMCOUNT
632 BUILD_C_RECORDMCOUNT
:= y
633 export BUILD_C_RECORDMCOUNT
638 # We trigger additional mismatches with less inlining
639 ifdef CONFIG_DEBUG_SECTION_MISMATCH
640 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
643 # arch Makefile may override CC so keep this after arch Makefile is included
644 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
645 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
647 # warn about C99 declaration after statement
648 KBUILD_CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
650 # disable pointer signed / unsigned warnings in gcc 4.0
651 KBUILD_CFLAGS
+= $(call cc-disable-warning
, pointer-sign
)
653 # disable invalid "can't wrap" optimizations for signed / pointers
654 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
656 # conserve stack if available
657 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
659 # use the deterministic mode of AR if available
660 KBUILD_ARFLAGS
:= $(call ar-option
,D
)
662 # check for 'asm goto'
663 ifeq ($(shell $(CONFIG_SHELL
) $(srctree
)/scripts
/gcc-goto.sh
$(CC
)), y
)
664 KBUILD_CFLAGS
+= -DCC_HAVE_ASM_GOTO
667 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
668 KBUILD_CPPFLAGS
+= $(KCPPFLAGS
)
669 KBUILD_AFLAGS
+= $(KAFLAGS
)
670 KBUILD_CFLAGS
+= $(KCFLAGS
)
672 # Use --build-id when available.
673 LDFLAGS_BUILD_ID
= $(patsubst -Wl
$(comma
)%,%,\
674 $(call cc-ldoption
, -Wl
$(comma
)--build-id
,))
675 KBUILD_LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
676 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
678 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
679 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
682 # Default kernel image to build when no specific target is given.
683 # KBUILD_IMAGE may be overruled on the command line or
684 # set in the environment
685 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
687 export KBUILD_IMAGE ?
= vmlinux
690 # INSTALL_PATH specifies where to place the updated kernel and system map
691 # images. Default is /boot, but you can set it to other values
692 export INSTALL_PATH ?
= /boot
695 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
696 # relocations required by build roots. This is not defined in the
697 # makefile but the argument can be passed to make if needed.
700 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
704 # INSTALL_MOD_STRIP, if defined, will cause modules to be
705 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
706 # the default option --strip-debug will be used. Otherwise,
707 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
709 ifdef INSTALL_MOD_STRIP
710 ifeq ($(INSTALL_MOD_STRIP
),1)
711 mod_strip_cmd
= $(STRIP
) --strip-debug
713 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
714 endif # INSTALL_MOD_STRIP=1
717 endif # INSTALL_MOD_STRIP
721 ifeq ($(CONFIG_MODULE_SIG
),y
)
722 MODSECKEY
= .
/signing_key.priv
723 MODPUBKEY
= .
/signing_key.x509
725 mod_sign_cmd
= perl
$(srctree
)/scripts
/sign-file
$(MODSECKEY
) $(MODPUBKEY
)
732 ifeq ($(KBUILD_EXTMOD
),)
733 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
735 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
736 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
737 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
739 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
741 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
742 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
744 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
745 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
746 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
747 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
748 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
749 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
750 libs-y
:= $(libs-y1
) $(libs-y2
)
752 # Externally visible symbols (used by link-vmlinux.sh)
753 export KBUILD_VMLINUX_INIT
:= $(head-y
) $(init-y
)
754 export KBUILD_VMLINUX_MAIN
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
755 export KBUILD_LDS
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
756 export LDFLAGS_vmlinux
758 vmlinux-deps
:= $(KBUILD_LDS
) $(KBUILD_VMLINUX_INIT
) $(KBUILD_VMLINUX_MAIN
)
760 # Final link of vmlinux
761 cmd_link-vmlinux
= $(CONFIG_SHELL
) $< $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
)
762 quiet_cmd_link-vmlinux
= LINK
$@
764 # Include targets which we want to
765 # execute if the rest of the kernel build went well.
766 vmlinux
: scripts
/link-vmlinux.sh
$(vmlinux-deps
) FORCE
767 ifdef CONFIG_HEADERS_CHECK
768 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
771 $(Q
)$(MAKE
) $(build
)=samples
773 ifdef CONFIG_BUILD_DOCSRC
774 $(Q
)$(MAKE
) $(build
)=Documentation
776 +$(call if_changed
,link-vmlinux
)
778 # The actual objects are generated when descending,
779 # make sure no implicit rule kicks in
780 $(sort $(vmlinux-deps
)): $(vmlinux-dirs
) ;
782 # Handle descending into subdirectories listed in $(vmlinux-dirs)
783 # Preset locale variables to speed up the build process. Limit locale
784 # tweaks to this spot to avoid wrong language settings when running
785 # make menuconfig etc.
786 # Error messages still appears in the original language
788 PHONY
+= $(vmlinux-dirs
)
789 $(vmlinux-dirs
): prepare scripts
790 $(Q
)$(MAKE
) $(build
)=$@
792 # Store (new) KERNELRELASE string in include/config/kernel.release
793 include/config
/kernel.release
: include/config
/auto.conf FORCE
795 $(Q
)echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
798 # Things we need to do before we recursively start building the kernel
799 # or the modules are listed in "prepare".
800 # A multi level approach is used. prepareN is processed before prepareN-1.
801 # archprepare is used in arch Makefiles and when processed asm symlink,
802 # version.h and scripts_basic is processed / created.
804 # Listed in dependency order
805 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
807 # prepare3 is used to check if we are building in a separate output directory,
809 # 1) Check that make has not been executed in the kernel src $(srctree)
810 prepare3
: include/config
/kernel.release
811 ifneq ($(KBUILD_SRC
),)
812 @
$(kecho
) ' Using $(srctree) as source for kernel'
813 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
814 echo
>&2 " $(srctree) is not clean, please run 'make mrproper'"; \
815 echo
>&2 " in the '$(srctree)' directory.";\
820 # prepare2 creates a makefile if using a separate output directory
821 prepare2
: prepare3 outputmakefile asm-generic
823 prepare1
: prepare2
$(version_h
) include/generated
/utsrelease.h \
824 include/config
/auto.conf
827 archprepare
: archheaders archscripts prepare1 scripts_basic
829 prepare0
: archprepare FORCE
830 $(Q
)$(MAKE
) $(build
)=.
832 # All the preparing..
835 # Generate some files
836 # ---------------------------------------------------------------------------
838 # KERNELRELEASE can change from a few different places, meaning version.h
839 # needs to be updated, so this check is forced on all builds
842 define filechk_utsrelease.h
843 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
844 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
847 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
850 define filechk_version.h
851 (echo \
#define LINUX_VERSION_CODE $(shell \
852 expr
$(VERSION
) \
* 65536 + 0$(PATCHLEVEL
) \
* 256 + 0$(SUBLEVEL
)); \
853 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
856 $(version_h
): $(srctree
)/Makefile FORCE
857 $(call filechk
,version.h
)
859 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
860 $(call filechk
,utsrelease.h
)
864 $(Q
)find
$(srctree
)/include/ -name
'*.h' | xargs
--max-args
1 \
865 $(srctree
)/scripts
/headerdep.pl
-I
$(srctree
)/include
867 # ---------------------------------------------------------------------------
871 @echo
'*** Warning: make $@ is unnecessary now.'
873 # ---------------------------------------------------------------------------
875 INSTALL_FW_PATH
=$(INSTALL_MOD_PATH
)/lib
/firmware
876 export INSTALL_FW_PATH
878 PHONY
+= firmware_install
879 firmware_install
: FORCE
880 @mkdir
-p
$(objtree
)/firmware
881 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_install
883 # ---------------------------------------------------------------------------
886 #Default location for installed headers
887 export INSTALL_HDR_PATH
= $(objtree
)/usr
889 hdr-inst
:= -rR
-f
$(srctree
)/scripts
/Makefile.headersinst obj
891 # If we do an all arch process set dst to asm-$(hdr-arch)
892 hdr-dst
= $(if
$(KBUILD_HEADERS
), dst
=include/asm-
$(hdr-arch
), dst
=include/asm
)
901 __headers
: $(version_h
) scripts_basic asm-generic archheaders archscripts FORCE
902 $(Q
)$(MAKE
) $(build
)=scripts build_unifdef
904 PHONY
+= headers_install_all
906 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
install
908 PHONY
+= headers_install
909 headers_install
: __headers
910 $(if
$(wildcard $(srctree
)/arch
/$(hdr-arch
)/include/uapi
/asm
/Kbuild
),, \
911 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
912 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi
913 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/uapi
/asm
$(hdr-dst
)
915 PHONY
+= headers_check_all
916 headers_check_all
: headers_install_all
917 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
check
919 PHONY
+= headers_check
920 headers_check
: headers_install
921 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi HDRCHECK
=1
922 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/uapi
/asm
$(hdr-dst
) HDRCHECK
=1
924 # ---------------------------------------------------------------------------
929 # By default, build modules as well
935 # A module can be listed more than once in obj-m resulting in
936 # duplicate lines in modules.order files. Those are removed
937 # using awk while concatenating to the final file.
940 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
) modules.builtin
941 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.order
) > $(objtree
)/modules.order
942 @
$(kecho
) ' Building modules, stage 2.';
943 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
944 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modbuild
946 modules.builtin
: $(vmlinux-dirs
:%=%/modules.builtin
)
947 $(Q
)$(AWK
) '!x[$$0]++' $^
> $(objtree
)/modules.builtin
949 %/modules.builtin
: include/config
/auto.conf
950 $(Q
)$(MAKE
) $(modbuiltin
)=$*
953 # Target to prepare building external modules
954 PHONY
+= modules_prepare
955 modules_prepare
: prepare scripts
957 # Target to install modules
958 PHONY
+= modules_install
959 modules_install
: _modinst_ _modinst_post
963 @
rm -rf
$(MODLIB
)/kernel
964 @
rm -f
$(MODLIB
)/source
965 @mkdir
-p
$(MODLIB
)/kernel
966 @ln
-s
$(srctree
) $(MODLIB
)/source
967 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
968 rm -f
$(MODLIB
)/build
; \
969 ln
-s
$(objtree
) $(MODLIB
)/build
; \
971 @cp
-f
$(objtree
)/modules.order
$(MODLIB
)/
972 @cp
-f
$(objtree
)/modules.builtin
$(MODLIB
)/
973 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
975 # This depmod is only for convenience to give the initial
976 # boot a modules.dep even before / is mounted read-write. However the
977 # boot script depmod is the master version.
978 PHONY
+= _modinst_post
979 _modinst_post
: _modinst_
980 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modinst
983 ifeq ($(CONFIG_MODULE_SIG
), y
)
984 PHONY
+= modules_sign
986 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modsign
989 else # CONFIG_MODULES
991 # Modules not configured
992 # ---------------------------------------------------------------------------
994 modules modules_install
: FORCE
996 @echo
>&2 "The present kernel configuration has modules disabled."
997 @echo
>&2 "Type 'make config' and enable loadable module support."
998 @echo
>&2 "Then build a kernel with module support enabled."
1002 endif # CONFIG_MODULES
1005 # Cleaning is done on three levels.
1006 # make clean Delete most generated files
1007 # Leave enough to build external modules
1008 # make mrproper Delete the current configuration, and all generated files
1009 # make distclean Remove editor backup files, patch leftover files and the like
1011 # Directories & files removed with 'make clean'
1012 CLEAN_DIRS
+= $(MODVERDIR
)
1014 # Directories & files removed with 'make mrproper'
1015 MRPROPER_DIRS
+= include/config usr
/include include/generated \
1016 arch
/*/include/generated
1017 MRPROPER_FILES
+= .config .config.old .version .old_version
$(version_h
) \
1018 Module.symvers
tags TAGS cscope
* GPATH GTAGS GRTAGS GSYMS \
1019 signing_key.priv signing_key.x509 x509.genkey \
1020 extra_certificates signing_key.x509.keyid \
1021 signing_key.x509.signer
1023 # clean - Delete most, but leave enough to build external modules
1025 clean: rm-dirs
:= $(CLEAN_DIRS
)
1026 clean: rm-files
:= $(CLEAN_FILES
)
1027 clean-dirs
:= $(addprefix _clean_
, .
$(vmlinux-alldirs
) Documentation samples
)
1029 PHONY
+= $(clean-dirs
) clean archclean vmlinuxclean
1031 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1034 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/link-vmlinux.sh
clean
1036 clean: archclean vmlinuxclean
1038 # mrproper - Delete all generated files, including .config
1040 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1041 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1042 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
1044 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1046 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1048 mrproper
: clean archmrproper
$(mrproper-dirs
)
1057 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1058 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1059 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1061 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
1062 -type f
-print | xargs
rm -f
1065 # Packaging of the kernel to various formats
1066 # ---------------------------------------------------------------------------
1067 # rpm target kept for backward compatibility
1068 package-dir
:= $(srctree
)/scripts
/package
1071 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1072 %pkg
: include/config
/kernel.release FORCE
1073 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1074 rpm
: include/config
/kernel.release FORCE
1075 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1078 # Brief documentation of the typical targets used
1079 # ---------------------------------------------------------------------------
1081 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1082 boards
:= $(notdir $(boards
))
1083 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1084 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1087 @echo
'Cleaning targets:'
1088 @echo
' clean - Remove most generated files but keep the config and'
1089 @echo
' enough build support to build external modules'
1090 @echo
' mrproper - Remove all generated files + config + various backup files'
1091 @echo
' distclean - mrproper + remove editor backup and patch files'
1093 @echo
'Configuration targets:'
1094 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1096 @echo
'Other generic targets:'
1097 @echo
' all - Build all targets marked with [*]'
1098 @echo
'* vmlinux - Build the bare kernel'
1099 @echo
'* modules - Build all modules'
1100 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1101 @echo
' firmware_install- Install all firmware to INSTALL_FW_PATH'
1102 @echo
' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1103 @echo
' dir/ - Build all files in dir and below'
1104 @echo
' dir/file.[oisS] - Build specified target only'
1105 @echo
' dir/file.lst - Build specified mixed source/assembly target only'
1106 @echo
' (requires a recent binutils and recent build (System.map))'
1107 @echo
' dir/file.ko - Build module including final link'
1108 @echo
' modules_prepare - Set up for building external modules'
1109 @echo
' tags/TAGS - Generate tags file for editors'
1110 @echo
' cscope - Generate cscope index'
1111 @echo
' gtags - Generate GNU GLOBAL index'
1112 @echo
' kernelrelease - Output the release version string'
1113 @echo
' kernelversion - Output the version stored in Makefile'
1114 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1115 echo
' (default: $(INSTALL_HDR_PATH))'; \
1117 @echo
'Static analysers'
1118 @echo
' checkstack - Generate a list of stack hogs'
1119 @echo
' namespacecheck - Name space analysis on compiled kernel'
1120 @echo
' versioncheck - Sanity check on version.h usage'
1121 @echo
' includecheck - Check for duplicate included header files'
1122 @echo
' export_report - List the usages of all exported symbols'
1123 @echo
' headers_check - Sanity check on exported headers'
1124 @echo
' headerdep - Detect inclusion cycles in headers'
1125 @
$(MAKE
) -f
$(srctree
)/scripts
/Makefile.help checker-help
1127 @echo
'Kernel packaging:'
1128 @
$(MAKE
) $(build
)=$(package-dir
) help
1130 @echo
'Documentation targets:'
1131 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1133 @echo
'Architecture specific targets ($(SRCARCH)):'
1134 @
$(if
$(archhelp
),$(archhelp
),\
1135 echo
' No architecture specific help defined for $(SRCARCH)')
1138 $(foreach b
, $(boards
), \
1139 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1141 @
$(if
$(board-dirs
), \
1142 $(foreach b
, $(board-dirs
), \
1143 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1144 printf
" %-16s - Show all of the above\\n" help-boards
; \
1147 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1148 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1149 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1150 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1151 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1152 @echo
' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1153 @echo
' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1154 @echo
' 1: warnings which may be relevant and do not occur too often'
1155 @echo
' 2: warnings which occur quite often but may still be relevant'
1156 @echo
' 3: more obscure warnings, can most likely be ignored'
1157 @echo
' Multiple levels can be combined with W=12 or W=123'
1159 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1160 @echo
'For further info see the ./README file'
1163 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1165 help-boards
: $(help-board-dirs
)
1167 boards-per-dir
= $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
))
1169 $(help-board-dirs
): help-
%:
1170 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1171 @
$(if
$(boards-per-dir
), \
1172 $(foreach b
, $(boards-per-dir
), \
1173 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1177 # Documentation targets
1178 # ---------------------------------------------------------------------------
1179 %docs
: scripts_basic FORCE
1180 $(Q
)$(MAKE
) $(build
)=scripts build_docproc
1181 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1183 else # KBUILD_EXTMOD
1186 # External module support.
1187 # When building external modules the kernel used as basis is considered
1188 # read-only, and no consistency checks are made and the make
1189 # system is not used on the basis kernel. If updates are required
1190 # in the basis kernel ordinary make commands (without M=...) must
1193 # The following are the only valid targets when building external
1195 # make M=dir clean Delete all automatically generated files
1196 # make M=dir modules Make all modules in specified dir
1197 # make M=dir Same as 'make M=dir modules'
1198 # make M=dir modules_install
1199 # Install the modules built in the module directory
1200 # Assumes install directory is already created
1202 # We are always building modules
1204 PHONY
+= crmodverdir
1208 PHONY
+= $(objtree
)/Module.symvers
1209 $(objtree
)/Module.symvers
:
1210 @
test -e
$(objtree
)/Module.symvers ||
( \
1212 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1213 echo
" is missing; modules will have no dependencies and modversions."; \
1216 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1217 PHONY
+= $(module-dirs
) modules
1218 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1219 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1221 modules
: $(module-dirs
)
1222 @
$(kecho
) ' Building modules, stage 2.';
1223 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1225 PHONY
+= modules_install
1226 modules_install
: _emodinst_ _emodinst_post
1228 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1231 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1232 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1234 PHONY
+= _emodinst_post
1235 _emodinst_post
: _emodinst_
1238 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1240 PHONY
+= $(clean-dirs
) clean
1242 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1244 clean: rm-dirs
:= $(MODVERDIR
)
1245 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers
1248 @echo
' Building external modules.'
1249 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1251 @echo
' modules - default target, build the module(s)'
1252 @echo
' modules_install - install the module'
1253 @echo
' clean - remove generated files in module directory only'
1257 PHONY
+= prepare scripts
1260 endif # KBUILD_EXTMOD
1262 clean: $(clean-dirs
)
1265 @find
$(if
$(KBUILD_EXTMOD
), $(KBUILD_EXTMOD
), .
) $(RCS_FIND_IGNORE
) \
1266 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1268 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1269 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1270 -o
-name modules.builtin
-o
-name
'.tmp_*.o.*' \
1271 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1273 # Generate tags for editors
1274 # ---------------------------------------------------------------------------
1275 quiet_cmd_tags
= GEN
$@
1276 cmd_tags
= $(CONFIG_SHELL
) $(srctree
)/scripts
/tags.sh
$@
1278 tags TAGS cscope gtags
: FORCE
1281 # Scripts to check various things for consistency
1282 # ---------------------------------------------------------------------------
1284 PHONY
+= includecheck versioncheck coccicheck namespacecheck export_report
1287 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1288 -name
'*.[hcS]' -type f
-print |
sort \
1289 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1292 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1293 -name
'*.[hcS]' -type f
-print |
sort \
1294 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1297 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/$@
1300 $(PERL
) $(srctree
)/scripts
/namespace.pl
1303 $(PERL
) $(srctree
)/scripts
/export_report.pl
1305 endif #ifeq ($(config-targets),1)
1306 endif #ifeq ($(mixed-targets),1)
1308 PHONY
+= checkstack kernelrelease kernelversion
1310 # UML needs a little special treatment here. It wants to use the host
1311 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1312 # else wants $(ARCH), including people doing cross-builds, which means
1313 # that $(SUBARCH) doesn't work here.
1315 CHECKSTACK_ARCH
:= $(SUBARCH
)
1317 CHECKSTACK_ARCH
:= $(ARCH
)
1320 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1321 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1324 @echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1327 @echo
$(KERNELVERSION
)
1329 # Clear a bunch of variables before executing the submake
1331 $(Q
)mkdir
-p
$(objtree
)/tools
1332 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
= O
=$(objtree
) subdir
=tools
-C
$(src
)/tools
/
1335 $(Q
)mkdir
-p
$(objtree
)/tools
1336 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
= O
=$(objtree
) subdir
=tools
-C
$(src
)/tools
/ $*
1339 # ---------------------------------------------------------------------------
1340 # Single targets are compatible with:
1341 # - build with mixed source and output
1342 # - build with separate output dir 'make O=...'
1343 # - external modules
1345 # target-dir => where to store outputfile
1346 # build-dir => directory in kernel source tree to use
1348 ifeq ($(KBUILD_EXTMOD
),)
1349 build-dir
= $(patsubst %/,%,$(dir $@
))
1350 target-dir
= $(dir $@
)
1352 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1353 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1354 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1357 %.s
: %.c prepare scripts FORCE
1358 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1359 %.i
: %.c prepare scripts FORCE
1360 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1361 %.o
: %.c prepare scripts FORCE
1362 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1363 %.lst
: %.c prepare scripts FORCE
1364 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1365 %.s
: %.S prepare scripts FORCE
1366 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1367 %.o
: %.S prepare scripts FORCE
1368 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1369 %.symtypes
: %.c prepare scripts FORCE
1370 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1373 /: prepare scripts FORCE
1375 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1376 $(build
)=$(build-dir
)
1377 %/: prepare scripts FORCE
1379 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1380 $(build
)=$(build-dir
)
1381 %.ko
: prepare scripts FORCE
1383 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1384 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1385 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1387 # FIXME Should go into a make.lib or something
1388 # ===========================================================================
1390 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1391 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1393 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1394 cmd_rmfiles
= rm -f
$(rm-files
)
1396 # Run depmod only if we have System.map and depmod is executable
1397 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1398 cmd_depmod
= $(CONFIG_SHELL
) $(srctree
)/scripts
/depmod.sh
$(DEPMOD
) \
1399 $(KERNELRELEASE
) "$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX))"
1401 # Create temporary dir for module support files
1402 # clean it up only when building all modules
1403 cmd_crmodverdir
= $(Q
)mkdir
-p
$(MODVERDIR
) \
1404 $(if
$(KBUILD_MODULES
),; rm -f
$(MODVERDIR
)/*)
1406 # read all saved command lines
1408 targets
:= $(wildcard $(sort $(targets
)))
1409 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1411 ifneq ($(cmd_files
),)
1412 $(cmd_files
): ; # Do not try to update included dependency files
1413 include $(cmd_files
)
1416 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1418 # $(Q)$(MAKE) $(clean)=dir
1419 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1421 endif # skip-makefile
1426 # Declare the contents of the .PHONY variable as phony. We keep that
1427 # information in a variable so we can use it in if_changed and friends.