5 NAME
=Crazed Snow-Weasel
8 # To see a list of typical targets execute "make help"
9 # More info can be located in ./README
10 # Comments in this file are targeted only to the developer, do not
11 # expect to learn how to build the kernel reading this file.
13 # Do not print "Entering directory ..."
14 MAKEFLAGS
+= --no-print-directory
16 # We are using a recursive build, so we need to do a little thinking
17 # to get the ordering right.
19 # Most importantly: sub-Makefiles should only ever modify files in
20 # their own directory. If in some directory we have a dependency on
21 # a file in another dir (which doesn't happen often, but it's often
22 # unavoidable when linking the built-in.o targets which finally
23 # turn into vmlinux), we will call a sub make in that other dir, and
24 # after that we are sure that everything which is in that other dir
27 # The only cases where we need to modify files which have global
28 # effects are thus separated out and done before the recursive
29 # descending is started. They are now explicitly listed as the
32 # To put more focus on warnings, be less verbose as default
33 # Use 'make V=1' to see the full commands
36 ifeq ("$(origin V)", "command line")
44 # Call sparse as part of compilation of C files
45 # Use 'make C=1' to enable sparse checking
48 ifeq ("$(origin C)", "command line")
49 KBUILD_CHECKSRC
= $(C
)
52 ifndef KBUILD_CHECKSRC
56 # Use make M=dir to specify directory of external module to build
57 # Old syntax make ... SUBDIRS=$PWD is still supported
58 # Setting the environment variable KBUILD_EXTMOD take precedence
60 KBUILD_EXTMOD ?
= $(SUBDIRS
)
63 ifeq ("$(origin M)", "command line")
69 # kbuild supports saving output files in a separate directory.
70 # To locate output files in a separate directory two syntaxes are supported.
71 # In both cases the working directory must be the root of the kernel src.
73 # Use "make O=dir/to/store/output/files/"
75 # 2) Set KBUILD_OUTPUT
76 # Set the environment variable KBUILD_OUTPUT to point to the directory
77 # where the output files shall be placed.
78 # export KBUILD_OUTPUT=dir/to/store/output/files/
81 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
85 # KBUILD_SRC is set on invocation of make in OBJ directory
86 # KBUILD_SRC is not intended to be used by the regular user (for now)
89 # OK, Make called in directory where kernel src resides
90 # Do we want to locate output files in a separate directory?
92 ifeq ("$(origin O)", "command line")
97 # That's our default target when none is given on the command line
101 ifneq ($(KBUILD_OUTPUT
),)
102 # Invoke a second make in the output directory, passing relevant variables
103 # check that the output directory actually exists
104 saved-output
:= $(KBUILD_OUTPUT
)
105 KBUILD_OUTPUT
:= $(shell cd
$(KBUILD_OUTPUT
) && /bin
/pwd
)
106 $(if
$(KBUILD_OUTPUT
),, \
107 $(error output directory
"$(saved-output)" does not exist
))
109 PHONY
+= $(MAKECMDGOALS
)
111 $(filter-out _all
,$(MAKECMDGOALS
)) _all
:
112 $(if
$(KBUILD_VERBOSE
:1=),@
)$(MAKE
) -C
$(KBUILD_OUTPUT
) \
113 KBUILD_SRC
=$(CURDIR
) \
114 KBUILD_EXTMOD
="$(KBUILD_EXTMOD)" -f
$(CURDIR
)/Makefile
$@
116 # Leave processing to above invocation of make
118 endif # ifneq ($(KBUILD_OUTPUT),)
119 endif # ifeq ($(KBUILD_SRC),)
121 # We process the rest of the Makefile if this is the final invocation of make
122 ifeq ($(skip-makefile
),)
124 # If building an external module we do not care about the all: rule
125 # but instead _all depend on modules
127 ifeq ($(KBUILD_EXTMOD
),)
133 srctree
:= $(if
$(KBUILD_SRC
),$(KBUILD_SRC
),$(CURDIR
))
135 # FIXME - TOPDIR is obsolete, use srctree/objtree
140 VPATH
:= $(srctree
)$(if
$(KBUILD_EXTMOD
),:$(KBUILD_EXTMOD
))
142 export srctree objtree VPATH TOPDIR
145 # SUBARCH tells the usermode build what the underlying arch is. That is set
146 # first, and if a usermode build is happening, the "ARCH=um" on the command
147 # line overrides the setting of ARCH below. If a native build is happening,
148 # then ARCH is assigned, getting whatever value it gets normally, and
149 # SUBARCH is subsequently ignored.
151 SUBARCH
:= $(shell uname
-m | sed
-e s
/i
.86/i386
/ -e s
/sun4u
/sparc64
/ \
152 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
153 -e s
/s390x
/s390
/ -e s
/parisc64
/parisc
/ \
154 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ )
156 # Cross compiling and selecting different set of gcc/bin-utils
157 # ---------------------------------------------------------------------------
159 # When performing cross compilation for other architectures ARCH shall be set
160 # to the target architecture. (See arch/* for the possibilities).
161 # ARCH can be set during invocation of make:
163 # Another way is to have ARCH set in the environment.
164 # The default ARCH is the host where make is executed.
166 # CROSS_COMPILE specify the prefix used for all executables used
167 # during compilation. Only gcc and related bin-utils executables
168 # are prefixed with $(CROSS_COMPILE).
169 # CROSS_COMPILE can be set on the command line
170 # make CROSS_COMPILE=ia64-linux-
171 # Alternatively CROSS_COMPILE can be set in the environment.
172 # Default value for CROSS_COMPILE is not to prefix executables
173 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
178 # Architecture as present in compile.h
179 UTS_MACHINE
:= $(ARCH
)
181 KCONFIG_CONFIG ?
= .config
183 # SHELL used by kbuild
184 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
185 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
186 else echo sh
; fi
; fi
)
190 HOSTCFLAGS
= -Wall
-Wstrict-prototypes
-O2
-fomit-frame-pointer
193 # Decide whether to build built-in, modular, or both.
194 # Normally, just do built-in.
199 # If we have only "make modules", don't compile built-in objects.
200 # When we're building modules with modversions, we need to consider
201 # the built-in objects during the descend as well, in order to
202 # make sure the checksums are uptodate before we record them.
204 ifeq ($(MAKECMDGOALS
),modules
)
205 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
208 # If we have "make <whatever> modules", compile modules
209 # in addition to whatever we do anyway.
210 # Just "make" or "make all" shall build modules as well
212 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
216 ifeq ($(MAKECMDGOALS
),)
220 export KBUILD_MODULES KBUILD_BUILTIN
221 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
224 # ---------------------------------------------------------------------------
226 # Normally, we echo the whole command before executing it. By making
227 # that echo $($(quiet)$(cmd)), we now have the possibility to set
228 # $(quiet) to choose other forms of output instead, e.g.
230 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
231 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
233 # If $(quiet) is empty, the whole command will be printed.
234 # If it is set to "quiet_", only the short version will be printed.
235 # If it is set to "silent_", nothing wil be printed at all, since
236 # the variable $(silent_cmd_cc_o_c) doesn't exist.
238 # A simple variant is to prefix commands with $(Q) - that's useful
239 # for commands that shall be hidden in non-verbose mode.
243 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
244 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
246 ifeq ($(KBUILD_VERBOSE
),1)
254 # If the user is running make -s (silent mode), suppress echoing of
257 ifneq ($(findstring s
,$(MAKEFLAGS
)),)
261 export quiet Q KBUILD_VERBOSE
264 # Look for make include files relative to root of kernel src
265 MAKEFLAGS
+= --include-dir
=$(srctree
)
267 # We need some generic definitions
268 include $(srctree
)/scripts
/Kbuild.
include
270 # For maximum performance (+ possibly random breakage, uncomment
275 # Make variables (CC, etc...)
277 AS
= $(CROSS_COMPILE
)as
278 LD
= $(CROSS_COMPILE
)ld
279 CC
= $(CROSS_COMPILE
)gcc
281 AR
= $(CROSS_COMPILE
)ar
282 NM
= $(CROSS_COMPILE
)nm
283 STRIP
= $(CROSS_COMPILE
)strip
284 OBJCOPY
= $(CROSS_COMPILE
)objcopy
285 OBJDUMP
= $(CROSS_COMPILE
)objdump
287 GENKSYMS
= scripts
/genksyms
/genksyms
288 DEPMOD
= /sbin
/depmod
289 KALLSYMS
= scripts
/kallsyms
293 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__
-Wbitwise
$(CF
)
295 CFLAGS_MODULE
= $(MODFLAGS
)
296 AFLAGS_MODULE
= $(MODFLAGS
)
302 # Use LINUXINCLUDE when you must reference the include/ directory.
303 # Needed to be compatible with the O= option
304 LINUXINCLUDE
:= -Iinclude \
305 $(if
$(KBUILD_SRC
),-Iinclude2
-I
$(srctree
)/include) \
306 -include include/linux
/autoconf.h
308 CPPFLAGS
:= -D__KERNEL__
$(LINUXINCLUDE
)
310 CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
311 -fno-strict-aliasing
-fno-common
312 AFLAGS
:= -D__ASSEMBLY__
314 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
315 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
316 KERNELVERSION
= $(VERSION
).
$(PATCHLEVEL
).
$(SUBLEVEL
)$(EXTRAVERSION
)
318 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
319 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
320 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
321 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
323 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
324 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
325 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
327 # When compiling out-of-tree modules, put MODVERDIR in the module
328 # tree rather than in the kernel tree. The kernel tree might
330 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
332 # Files to ignore in find ... statements
334 RCS_FIND_IGNORE
:= \
( -name SCCS
-o
-name BitKeeper
-o
-name .svn
-o
-name CVS
-o
-name .
pc -o
-name .hg
-o
-name .git \
) -prune
-o
335 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn
--exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
337 # ===========================================================================
338 # Rules shared between *config targets and build targets
340 # Basic helpers built in scripts/
341 PHONY
+= scripts_basic
343 $(Q
)$(MAKE
) $(build
)=scripts
/basic
345 # To avoid any implicit rule to kick in, define an empty command.
346 scripts
/basic
/%: scripts_basic
;
348 PHONY
+= outputmakefile
349 # outputmakefile generates a Makefile in the output directory, if using a
350 # separate output directory. This allows convenient use of make in the
353 ifneq ($(KBUILD_SRC
),)
354 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
355 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
358 # To make sure we do not include .config for any of the *config targets
359 # catch them early, and hand them over to scripts/kconfig/Makefile
360 # It is allowed to specify more targets when calling make, including
361 # mixing *config targets and build targets.
362 # For example 'make oldconfig all'.
363 # Detect when mixed targets is specified, and make a second invocation
364 # of make so .config is not included in this case either (for *config).
366 no-dot-config-targets
:= clean mrproper
distclean \
367 cscope TAGS
tags help
%docs
check% \
368 kernelrelease kernelversion
374 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
375 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
380 ifeq ($(KBUILD_EXTMOD
),)
381 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
383 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
389 ifeq ($(mixed-targets
),1)
390 # ===========================================================================
391 # We're called with mixed targets (*config and build targets).
392 # Handle them one by one.
395 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
398 ifeq ($(config-targets
),1)
399 # ===========================================================================
400 # *config targets only - make sure prerequisites are updated, and descend
401 # in scripts/kconfig to make the *config target
403 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
404 # KBUILD_DEFCONFIG may point out an alternative default configuration
405 # used for 'make defconfig'
406 include $(srctree
)/arch
/$(ARCH
)/Makefile
407 export KBUILD_DEFCONFIG
409 config
%config
: scripts_basic outputmakefile FORCE
410 $(Q
)mkdir
-p
include/linux
include/config
411 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
414 # ===========================================================================
415 # Build targets only - this includes vmlinux, arch specific targets, clean
416 # targets and others. In general all targets except *config targets.
418 ifeq ($(KBUILD_EXTMOD
),)
419 # Additional helpers built in scripts/
420 # Carefully list dependencies so we do not try to build scripts twice
423 scripts
: scripts_basic
include/config
/auto.conf
424 $(Q
)$(MAKE
) $(build
)=$(@
)
426 # Objects we will link into vmlinux / subdirs we need to visit
428 drivers-y
:= drivers
/ sound
/
432 endif # KBUILD_EXTMOD
434 ifeq ($(dot-config
),1)
435 # In this section, we need .config
437 # Read in dependencies to all Kconfig* files, make sure to run
438 # oldconfig if changes are detected.
439 -include include/config
/auto.conf.cmd
440 -include include/config
/auto.conf
442 # To avoid any implicit rule to kick in, define an empty command
443 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
445 # If .config is newer than include/config/auto.conf, someone tinkered
446 # with it and forgot to run make oldconfig.
447 # if auto.conf.cmd is missing then we are probarly in a cleaned tree so
448 # we execute the config step to be sure to catch updated Kconfig files
449 include/config
/auto.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
450 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
453 # Dummy target needed, because used as prerequisite
454 include/config
/auto.conf
: ;
457 # The all: target is the default when no target is given on the
459 # This allow a user to issue only 'make' to build a kernel including modules
460 # Defaults vmlinux but it is usually overriden in the arch makefile
463 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
469 ifdef CONFIG_FRAME_POINTER
470 CFLAGS
+= -fno-omit-frame-pointer
$(call cc-option
,-fno-optimize-sibling-calls
,)
472 CFLAGS
+= -fomit-frame-pointer
475 ifdef CONFIG_UNWIND_INFO
476 CFLAGS
+= -fasynchronous-unwind-tables
479 ifdef CONFIG_DEBUG_INFO
483 include $(srctree
)/arch
/$(ARCH
)/Makefile
485 # arch Makefile may override CC so keep this after arch Makefile is included
486 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
487 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
489 # warn about C99 declaration after statement
490 CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
492 # disable pointer signedness warnings in gcc 4.0
493 CFLAGS
+= $(call cc-option
,-Wno-pointer-sign
,)
495 # Default kernel image to build when no specific target is given.
496 # KBUILD_IMAGE may be overruled on the commandline or
497 # set in the environment
498 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
500 export KBUILD_IMAGE ?
= vmlinux
503 # INSTALL_PATH specifies where to place the updated kernel and system map
504 # images. Default is /boot, but you can set it to other values
505 export INSTALL_PATH ?
= /boot
508 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
509 # relocations required by build roots. This is not defined in the
510 # makefile but the arguement can be passed to make if needed.
513 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
517 ifeq ($(KBUILD_EXTMOD
),)
518 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
520 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
521 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
522 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
524 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
526 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
527 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
529 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
530 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
531 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
532 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
533 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
534 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
535 libs-y
:= $(libs-y1
) $(libs-y2
)
538 # ---------------------------------------------------------------------------
539 # vmlinux is build from the objects selected by $(vmlinux-init) and
540 # $(vmlinux-main). Most are built-in.o files from top-level directories
541 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
542 # Ordering when linking is important, and $(vmlinux-init) must be first.
547 # +-< $(vmlinux-init)
548 # | +--< init/version.o + more
550 # +--< $(vmlinux-main)
551 # | +--< driver/built-in.o mm/built-in.o + more
553 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
555 # vmlinux version (uname -v) cannot be updated during normal
556 # descending-into-subdirs phase since we do not yet know if we need to
558 # Therefore this step is delayed until just before final link of vmlinux -
559 # except in the kallsyms case where it is done just before adding the
560 # symbols to the kernel.
562 # System.map is generated to document addresses of all kernel symbols
564 vmlinux-init
:= $(head-y
) $(init-y
)
565 vmlinux-main
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
566 vmlinux-all
:= $(vmlinux-init
) $(vmlinux-main
)
567 vmlinux-lds
:= arch
/$(ARCH
)/kernel
/vmlinux.lds
569 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
570 # May be overridden by arch/$(ARCH)/Makefile
571 quiet_cmd_vmlinux__ ?
= LD
$@
572 cmd_vmlinux__ ?
= $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
) -o
$@ \
573 -T
$(vmlinux-lds
) $(vmlinux-init
) \
574 --start-group
$(vmlinux-main
) --end-group \
575 $(filter-out $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) FORCE
,$^
)
577 # Generate new vmlinux version
578 quiet_cmd_vmlinux_version
= GEN .version
579 cmd_vmlinux_version
= set
-e
; \
580 if
[ ! -r .version
]; then \
584 mv .version .old_version
; \
585 expr
0$$(cat .old_version
) + 1 >.version
; \
587 $(MAKE
) $(build
)=init
589 # Generate System.map
590 quiet_cmd_sysmap
= SYSMAP
591 cmd_sysmap
= $(CONFIG_SHELL
) $(srctree
)/scripts
/mksysmap
594 # If CONFIG_KALLSYMS is set .version is already updated
595 # Generate System.map and verify that the content is consistent
596 # Use + in front of the vmlinux_version rule to silent warning with make -j2
597 # First command is ':' to allow us to use + in front of the rule
598 define rule_vmlinux__
600 $(if
$(CONFIG_KALLSYMS
),,+$(call cmd
,vmlinux_version
))
602 $(call cmd
,vmlinux__
)
603 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
605 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
606 echo
' $($(quiet)cmd_sysmap) System.map' &&) \
607 $(cmd_sysmap
) $@ System.map
; \
608 if
[ $$?
-ne
0 ]; then \
616 ifdef CONFIG_KALLSYMS
617 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
618 # It's a three stage process:
619 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
621 # Running kallsyms on that gives us .tmp_kallsyms1.o with
622 # the right size - vmlinux version (uname -v) is updated during this step
623 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
624 # but due to the added section, some addresses have shifted.
625 # From here, we generate a correct .tmp_kallsyms2.o
626 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
627 # o Verify that the System.map from vmlinux matches the map from
628 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
629 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
630 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
631 # temporary bypass to allow the kernel to be built while the
632 # maintainers work out what went wrong with kallsyms.
634 ifdef CONFIG_KALLSYMS_EXTRA_PASS
640 kallsyms.o
:= .tmp_kallsyms
$(last_kallsyms
).o
642 define verify_kallsyms
643 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
644 echo
' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
645 $(cmd_sysmap
) .tmp_vmlinux
$(last_kallsyms
) .tmp_System.map
646 $(Q
)cmp
-s System.map .tmp_System.map || \
647 (echo Inconsistent kallsyms data
; \
648 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS
; \
649 rm .tmp_kallsyms
* ; /bin
/false
)
652 # Update vmlinux version before link
653 # Use + in front of this rule to silent warning about make -j1
654 # First command is ':' to allow us to use + in front of this rule
655 cmd_ksym_ld
= $(cmd_vmlinux__
)
658 +$(call cmd
,vmlinux_version
)
659 $(call cmd
,vmlinux__
)
660 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
663 # Generate .S file with all kernel symbols
664 quiet_cmd_kallsyms
= KSYM
$@
665 cmd_kallsyms
= $(NM
) -n
$< |
$(KALLSYMS
) \
666 $(if
$(CONFIG_KALLSYMS_ALL
),--all-symbols
) > $@
668 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o
: %.o
: %.S scripts FORCE
669 $(call if_changed_dep
,as_o_S
)
671 .tmp_kallsyms
%.S
: .tmp_vmlinux
% $(KALLSYMS
)
674 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
675 .tmp_vmlinux1
: $(vmlinux-lds
) $(vmlinux-all
) FORCE
676 $(call if_changed_rule
,ksym_ld
)
678 .tmp_vmlinux2
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms1.o FORCE
679 $(call if_changed
,vmlinux__
)
681 .tmp_vmlinux3
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms2.o FORCE
682 $(call if_changed
,vmlinux__
)
684 # Needs to visit scripts/ before $(KALLSYMS) can be used.
685 $(KALLSYMS
): scripts
;
687 # Generate some data for debugging strange kallsyms problems
688 debug_kallsyms
: .tmp_map
$(last_kallsyms
)
690 .tmp_map
%: .tmp_vmlinux
% FORCE
691 ($(OBJDUMP
) -h
$< |
$(AWK
) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM
) $<) |
sort > $@
697 endif # ifdef CONFIG_KALLSYMS
699 # vmlinux image - including updated kernel symbols
700 vmlinux
: $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) $(kallsyms.o
) FORCE
701 $(call if_changed_rule
,vmlinux__
)
702 $(Q
)rm -f .old_version
704 # The actual objects are generated when descending,
705 # make sure no implicit rule kicks in
706 $(sort $(vmlinux-init
) $(vmlinux-main
)) $(vmlinux-lds
): $(vmlinux-dirs
) ;
708 # Handle descending into subdirectories listed in $(vmlinux-dirs)
709 # Preset locale variables to speed up the build process. Limit locale
710 # tweaks to this spot to avoid wrong language settings when running
711 # make menuconfig etc.
712 # Error messages still appears in the original language
714 PHONY
+= $(vmlinux-dirs
)
715 $(vmlinux-dirs
): prepare scripts
716 $(Q
)$(MAKE
) $(build
)=$@
718 # Build the kernel release string
719 # The KERNELRELEASE is stored in a file named include/config/kernel.release
720 # to be used when executing for example make install or make modules_install
722 # Take the contents of any files called localversion* and the config
723 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
724 # LOCALVERSION from the command line override all of this
727 space
:= $(nullstring
) # end of line
729 ___localver
= $(objtree
)/localversion
* $(srctree
)/localversion
*
730 __localver
= $(sort $(wildcard $(___localver
)))
731 # skip backup files (containing '~')
732 _localver
= $(foreach f
, $(__localver
), $(if
$(findstring ~
, $(f
)),,$(f
)))
734 localver
= $(subst $(space
),, \
735 $(shell cat
/dev
/null
$(_localver
)) \
736 $(patsubst "%",%,$(CONFIG_LOCALVERSION
)))
738 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
739 # and if the SCM is know a tag from the SCM is appended.
740 # The appended tag is determinded by the SCM used.
742 # Currently, only git is supported.
743 # Other SCMs can edit scripts/setlocalversion and add the appropriate
745 ifdef CONFIG_LOCALVERSION_AUTO
746 _localver-auto
= $(shell $(CONFIG_SHELL
) \
747 $(srctree
)/scripts
/setlocalversion
$(srctree
))
748 localver-auto
= $(LOCALVERSION
)$(_localver-auto
)
751 localver-full
= $(localver
)$(localver-auto
)
753 # Store (new) KERNELRELASE string in include/config/kernel.release
754 kernelrelease
= $(KERNELVERSION
)$(localver-full
)
755 include/config
/kernel.release
: include/config
/auto.conf FORCE
757 $(Q
)echo
$(kernelrelease
) > $@
760 # Things we need to do before we recursively start building the kernel
761 # or the modules are listed in "prepare".
762 # A multi level approach is used. prepareN is processed before prepareN-1.
763 # archprepare is used in arch Makefiles and when processed asm symlink,
764 # version.h and scripts_basic is processed / created.
766 # Listed in dependency order
767 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
769 # prepare-all is deprecated, use prepare as valid replacement
772 # prepare3 is used to check if we are building in a separate output directory,
774 # 1) Check that make has not been executed in the kernel src $(srctree)
775 # 2) Create the include2 directory, used for the second asm symlink
776 prepare3
: include/config
/kernel.release
777 ifneq ($(KBUILD_SRC
),)
778 @echo
' Using $(srctree) as source for kernel'
779 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
780 echo
" $(srctree) is not clean, please run 'make mrproper'";\
781 echo
" in the '$(srctree)' directory.";\
784 $(Q
)if
[ ! -d include2
]; then mkdir
-p include2
; fi
;
785 $(Q
)ln
-fsn
$(srctree
)/include/asm-
$(ARCH
) include2
/asm
788 # prepare2 creates a makefile if using a separate output directory
789 prepare2
: prepare3 outputmakefile
791 prepare1
: prepare2
include/linux
/version.h
include/asm \
792 include/config
/auto.conf
793 ifneq ($(KBUILD_MODULES
),)
794 $(Q
)mkdir
-p
$(MODVERDIR
)
795 $(Q
)rm -f
$(MODVERDIR
)/*
798 archprepare
: prepare1 scripts_basic
800 prepare0
: archprepare FORCE
801 $(Q
)$(MAKE
) $(build
)=.
803 # All the preparing..
804 prepare prepare-all
: prepare0
806 # Leave this as default for preprocessing vmlinux.lds.S, which is now
807 # done in arch/$(ARCH)/kernel/Makefile
809 export CPPFLAGS_vmlinux.lds
+= -P
-C
-U
$(ARCH
)
811 # FIXME: The asm symlink changes when $(ARCH) changes. That's
812 # hard to detect, but I suppose "make mrproper" is a good idea
813 # before switching between archs anyway.
816 @echo
' SYMLINK $@ -> include/asm-$(ARCH)'
817 $(Q
)if
[ ! -d
include ]; then mkdir
-p
include; fi
;
818 @ln
-fsn asm-
$(ARCH
) $@
820 # Generate some files
821 # ---------------------------------------------------------------------------
823 # KERNELRELEASE can change from a few different places, meaning version.h
824 # needs to be updated, so this check is forced on all builds
828 define filechk_version.h
829 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
830 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
833 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
834 echo \
#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
835 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
839 include/linux
/version.h
: $(srctree
)/Makefile
include/config
/kernel.release FORCE
840 $(call filechk
,version.h
)
842 # ---------------------------------------------------------------------------
846 @echo
'*** Warning: make $@ is unnecessary now.'
848 # ---------------------------------------------------------------------------
853 # By default, build modules as well
860 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
)
861 @echo
' Building modules, stage 2.';
862 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modpost
865 # Target to prepare building external modules
866 PHONY
+= modules_prepare
867 modules_prepare
: prepare scripts
869 # Target to install modules
870 PHONY
+= modules_install
871 modules_install
: _modinst_ _modinst_post
875 @if
[ -z
"`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
876 echo
"Warning: you may need to install module-init-tools"; \
877 echo
"See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
880 @
rm -rf
$(MODLIB
)/kernel
881 @
rm -f
$(MODLIB
)/source
882 @mkdir
-p
$(MODLIB
)/kernel
883 @ln
-s
$(srctree
) $(MODLIB
)/source
884 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
885 rm -f
$(MODLIB
)/build
; \
886 ln
-s
$(objtree
) $(MODLIB
)/build
; \
888 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modinst
890 # If System.map exists, run depmod. This deliberately does not have a
891 # dependency on System.map since that would run the dependency tree on
892 # vmlinux. This depmod is only for convenience to give the initial
893 # boot a modules.dep even before / is mounted read-write. However the
894 # boot script depmod is the master version.
895 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
898 depmod_opts
:= -b
$(INSTALL_MOD_PATH
) -r
900 PHONY
+= _modinst_post
901 _modinst_post
: _modinst_
902 if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then
$(DEPMOD
) -ae
-F System.map
$(depmod_opts
) $(KERNELRELEASE
); fi
904 else # CONFIG_MODULES
906 # Modules not configured
907 # ---------------------------------------------------------------------------
909 modules modules_install
: FORCE
911 @echo
"The present kernel configuration has modules disabled."
912 @echo
"Type 'make config' and enable loadable module support."
913 @echo
"Then build a kernel with module support enabled."
917 endif # CONFIG_MODULES
920 # Cleaning is done on three levels.
921 # make clean Delete most generated files
922 # Leave enough to build external modules
923 # make mrproper Delete the current configuration, and all generated files
924 # make distclean Remove editor backup files, patch leftover files and the like
926 # Directories & files removed with 'make clean'
927 CLEAN_DIRS
+= $(MODVERDIR
)
928 CLEAN_FILES
+= vmlinux System.map \
929 .tmp_kallsyms
* .tmp_version .tmp_vmlinux
* .tmp_System.map
931 # Directories & files removed with 'make mrproper'
932 MRPROPER_DIRS
+= include/config include2
933 MRPROPER_FILES
+= .config .config.old
include/asm .version .old_version \
934 include/linux
/autoconf.h
include/linux
/version.h \
935 Module.symvers
tags TAGS cscope
*
937 # clean - Delete most, but leave enough to build external modules
939 clean: rm-dirs
:= $(CLEAN_DIRS
)
940 clean: rm-files
:= $(CLEAN_FILES
)
941 clean-dirs
:= $(addprefix _clean_
,$(srctree
) $(vmlinux-alldirs
))
943 PHONY
+= $(clean-dirs
) clean archclean
945 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
947 clean: archclean
$(clean-dirs
)
950 @find .
$(RCS_FIND_IGNORE
) \
951 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
952 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
) \
953 -type f
-print | xargs
rm -f
955 # mrproper - Delete all generated files, including .config
957 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
958 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
959 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
961 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
963 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
965 mrproper
: clean archmrproper
$(mrproper-dirs
)
974 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
975 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
976 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
977 -o
-name
'.*.rej' -o
-size
0 \
978 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
979 -type f
-print | xargs
rm -f
982 # Packaging of the kernel to various formats
983 # ---------------------------------------------------------------------------
984 # rpm target kept for backward compatibility
985 package-dir
:= $(srctree
)/scripts
/package
987 %pkg
: include/config
/kernel.release FORCE
988 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
989 rpm
: include/config
/kernel.release FORCE
990 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
993 # Brief documentation of the typical targets used
994 # ---------------------------------------------------------------------------
996 boards
:= $(wildcard $(srctree
)/arch
/$(ARCH
)/configs
/*_defconfig
)
997 boards
:= $(notdir $(boards
))
1000 @echo
'Cleaning targets:'
1001 @echo
' clean - remove most generated files but keep the config'
1002 @echo
' mrproper - remove all generated files + config + various backup files'
1004 @echo
'Configuration targets:'
1005 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1007 @echo
'Other generic targets:'
1008 @echo
' all - Build all targets marked with [*]'
1009 @echo
'* vmlinux - Build the bare kernel'
1010 @echo
'* modules - Build all modules'
1011 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1012 @echo
' dir/ - Build all files in dir and below'
1013 @echo
' dir/file.[ois] - Build specified target only'
1014 @echo
' dir/file.ko - Build module including final link'
1015 @echo
' rpm - Build a kernel as an RPM package'
1016 @echo
' tags/TAGS - Generate tags file for editors'
1017 @echo
' cscope - Generate cscope index'
1018 @echo
' kernelrelease - Output the release version string'
1019 @echo
' kernelversion - Output the version stored in Makefile'
1021 @echo
'Static analysers'
1022 @echo
' checkstack - Generate a list of stack hogs'
1023 @echo
' namespacecheck - Name space analysis on compiled kernel'
1025 @echo
'Kernel packaging:'
1026 @
$(MAKE
) $(build
)=$(package-dir
) help
1028 @echo
'Documentation targets:'
1029 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1031 @echo
'Architecture specific targets ($(ARCH)):'
1032 @
$(if
$(archhelp
),$(archhelp
),\
1033 echo
' No architecture specific help defined for $(ARCH)')
1036 $(foreach b
, $(boards
), \
1037 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1040 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1041 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1042 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1043 @echo
' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1045 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1046 @echo
'For further info see the ./README file'
1049 # Documentation targets
1050 # ---------------------------------------------------------------------------
1051 %docs
: scripts_basic FORCE
1052 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1054 else # KBUILD_EXTMOD
1057 # External module support.
1058 # When building external modules the kernel used as basis is considered
1059 # read-only, and no consistency checks are made and the make
1060 # system is not used on the basis kernel. If updates are required
1061 # in the basis kernel ordinary make commands (without M=...) must
1064 # The following are the only valid targets when building external
1066 # make M=dir clean Delete all automatically generated files
1067 # make M=dir modules Make all modules in specified dir
1068 # make M=dir Same as 'make M=dir modules'
1069 # make M=dir modules_install
1070 # Install the modules build in the module directory
1071 # Assumes install directory is already created
1073 # We are always building modules
1075 PHONY
+= crmodverdir
1077 $(Q
)mkdir
-p
$(MODVERDIR
)
1078 $(Q
)rm -f
$(MODVERDIR
)/*
1080 PHONY
+= $(objtree
)/Module.symvers
1081 $(objtree
)/Module.symvers
:
1082 @
test -e
$(objtree
)/Module.symvers ||
( \
1084 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1085 echo
" is missing; modules will have no dependencies and modversions."; \
1088 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1089 PHONY
+= $(module-dirs
) modules
1090 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1091 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1093 modules
: $(module-dirs
)
1094 @echo
' Building modules, stage 2.';
1095 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modpost
1097 PHONY
+= modules_install
1098 modules_install
: _emodinst_ _emodinst_post
1100 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1103 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1104 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modinst
1106 # Run depmod only is we have System.map and depmod is executable
1107 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1108 cmd_depmod
= if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then \
1109 $(DEPMOD
) -ae
-F System.map \
1110 $(if
$(strip $(INSTALL_MOD_PATH
)), \
1111 -b
$(INSTALL_MOD_PATH
) -r
) \
1115 PHONY
+= _emodinst_post
1116 _emodinst_post
: _emodinst_
1119 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1121 PHONY
+= $(clean-dirs
) clean
1123 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1125 clean: rm-dirs
:= $(MODVERDIR
)
1126 clean: $(clean-dirs
)
1128 @find
$(KBUILD_EXTMOD
) $(RCS_FIND_IGNORE
) \
1129 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1130 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
) \
1131 -type f
-print | xargs
rm -f
1134 @echo
' Building external modules.'
1135 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1137 @echo
' modules - default target, build the module(s)'
1138 @echo
' modules_install - install the module'
1139 @echo
' clean - remove generated files in module directory only'
1143 PHONY
+= prepare scripts
1146 endif # KBUILD_EXTMOD
1148 # Generate tags for editors
1149 # ---------------------------------------------------------------------------
1151 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1152 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1153 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1155 ifeq ($(src
),$(obj
))
1158 __srctree
= $(srctree
)/
1161 ifeq ($(ALLSOURCE_ARCHS
),)
1163 ALLINCLUDE_ARCHS
:= $(ARCH
) $(SUBARCH
)
1165 ALLINCLUDE_ARCHS
:= $(ARCH
)
1168 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1169 ALLINCLUDE_ARCHS
:= $(ALLSOURCE_ARCHS
)
1172 ALLSOURCE_ARCHS
:= $(ARCH
)
1175 ( find
$(__srctree
) $(RCS_FIND_IGNORE
) \
1176 \
( -name
include -o
-name arch \
) -prune
-o \
1177 -name
'*.[chS]' -print; \
1178 for ARCH in
$(ALLSOURCE_ARCHS
) ; do \
1179 find
$(__srctree
)arch
/$${ARCH} $(RCS_FIND_IGNORE
) \
1180 -name
'*.[chS]' -print; \
1182 find
$(__srctree
)security
/selinux
/include $(RCS_FIND_IGNORE
) \
1183 -name
'*.[chS]' -print; \
1184 find
$(__srctree
)include $(RCS_FIND_IGNORE
) \
1185 \
( -name config
-o
-name
'asm-*' \
) -prune \
1186 -o
-name
'*.[chS]' -print; \
1187 for ARCH in
$(ALLINCLUDE_ARCHS
) ; do \
1188 find
$(__srctree
)include/asm-
$${ARCH} $(RCS_FIND_IGNORE
) \
1189 -name
'*.[chS]' -print; \
1191 find
$(__srctree
)include/asm-generic
$(RCS_FIND_IGNORE
) \
1192 -name
'*.[chS]' -print )
1195 quiet_cmd_cscope-file
= FILELST cscope.files
1196 cmd_cscope-file
= (echo \
-k
; echo \
-q
; $(all-sources
)) > cscope.files
1198 quiet_cmd_cscope
= MAKE cscope.out
1199 cmd_cscope
= cscope
-b
1202 $(call cmd
,cscope-file
)
1205 quiet_cmd_TAGS
= MAKE
$@
1208 ETAGSF
=`etags --version | grep -i exuberant >/dev/null && \
1209 echo "-I __initdata,__exitdata,__acquires,__releases \
1210 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1211 --extra=+f --c-kinds=+px"`; \
1212 $(all-sources
) | xargs etags
$$ETAGSF -a
1219 quiet_cmd_tags
= MAKE
$@
1222 CTAGSF
=`ctags --version | grep -i exuberant >/dev/null && \
1223 echo "-I __initdata,__exitdata,__acquires,__releases \
1224 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1225 --extra=+f --c-kinds=+px"`; \
1226 $(all-sources
) | xargs ctags
$$CTAGSF -a
1233 # Scripts to check various things for consistency
1234 # ---------------------------------------------------------------------------
1237 find
* $(RCS_FIND_IGNORE
) \
1238 -name
'*.[hcS]' -type f
-print |
sort \
1239 | xargs
$(PERL
) -w scripts
/checkincludes.pl
1242 find
* $(RCS_FIND_IGNORE
) \
1243 -name
'*.[hcS]' -type f
-print |
sort \
1244 | xargs
$(PERL
) -w scripts
/checkversion.pl
1247 $(PERL
) $(srctree
)/scripts
/namespace.pl
1249 endif #ifeq ($(config-targets),1)
1250 endif #ifeq ($(mixed-targets),1)
1252 PHONY
+= checkstack kernelrelease kernelversion
1254 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1255 $(PERL
) $(src
)/scripts
/checkstack.pl
$(ARCH
)
1258 $(if
$(wildcard include/config
/kernel.release
), $(Q
)echo
$(KERNELRELEASE
), \
1259 $(error kernelrelease not valid
- run
'make prepare' to update it
))
1261 @echo
$(KERNELVERSION
)
1264 # ---------------------------------------------------------------------------
1265 # Single targets are compatible with:
1266 # - build whith mixed source and output
1267 # - build with separate output dir 'make O=...'
1268 # - external modules
1270 # target-dir => where to store outputfile
1271 # build-dir => directory in kernel source tree to use
1273 ifeq ($(KBUILD_EXTMOD
),)
1274 build-dir
= $(patsubst %/,%,$(dir $@
))
1275 target-dir
= $(dir $@
)
1277 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1278 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1279 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1282 %.s
: %.c prepare scripts FORCE
1283 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1284 %.i
: %.c prepare scripts FORCE
1285 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1286 %.o
: %.c prepare scripts FORCE
1287 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1288 %.lst
: %.c prepare scripts FORCE
1289 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1290 %.s
: %.S prepare scripts FORCE
1291 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1292 %.o
: %.S prepare scripts FORCE
1293 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1296 / %/: prepare scripts FORCE
1297 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1298 $(build
)=$(build-dir
)
1299 %.ko
: prepare scripts FORCE
1300 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1301 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1302 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modpost
1304 # FIXME Should go into a make.lib or something
1305 # ===========================================================================
1307 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1308 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1310 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1311 cmd_rmfiles
= rm -f
$(rm-files
)
1314 a_flags
= -Wp
,-MD
,$(depfile
) $(AFLAGS
) $(AFLAGS_KERNEL
) \
1315 $(NOSTDINC_FLAGS
) $(CPPFLAGS
) \
1316 $(modkern_aflags
) $(EXTRA_AFLAGS
) $(AFLAGS_
$(*F
).o
)
1318 quiet_cmd_as_o_S
= AS
$@
1319 cmd_as_o_S
= $(CC
) $(a_flags
) -c
-o
$@
$<
1321 # read all saved command lines
1323 targets
:= $(wildcard $(sort $(targets
)))
1324 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1326 ifneq ($(cmd_files
),)
1327 $(cmd_files
): ; # Do not try to update included dependency files
1328 include $(cmd_files
)
1331 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1333 # $(Q)$(MAKE) $(clean)=dir
1334 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1336 endif # skip-makefile
1342 # Declare the contents of the .PHONY variable as phony. We keep that
1343 # information in a variable se we can use it in if_changed and friends.