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 busybox), 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 # Cross compiling and selecting different set of gcc/bin-utils
146 # ---------------------------------------------------------------------------
148 # When performing cross compilation for other architectures ARCH shall be set
149 # to the target architecture. (See arch/* for the possibilities).
150 # ARCH can be set during invocation of make:
152 # Another way is to have ARCH set in the environment.
153 # The default ARCH is the host where make is executed.
155 # CROSS_COMPILE specify the prefix used for all executables used
156 # during compilation. Only gcc and related bin-utils executables
157 # are prefixed with $(CROSS_COMPILE).
158 # CROSS_COMPILE can be set on the command line
159 # make CROSS_COMPILE=ia64-linux-
160 # Alternatively CROSS_COMPILE can be set in the environment.
161 # Default value for CROSS_COMPILE is not to prefix executables
162 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
165 # bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config,
166 # and it has not been included yet... thus using an awkward syntax.
167 ifeq ($(CROSS_COMPILE
),)
168 CROSS_COMPILE
:= $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config
2>/dev
/null
)
169 CROSS_COMPILE
:= $(subst CONFIG_CROSS_COMPILER_PREFIX
=,,$(CROSS_COMPILE
))
170 CROSS_COMPILE
:= $(subst ",,$(CROSS_COMPILE))
174 # SUBARCH tells the usermode build what the underlying arch is. That is set
175 # first, and if a usermode build is happening, the "ARCH=um" on the command
176 # line overrides the setting of ARCH below. If a native build is happening,
177 # then ARCH is assigned, getting whatever value it gets normally, and
178 # SUBARCH is subsequently ignored.
180 ifneq ($(CROSS_COMPILE
),)
181 SUBARCH
:= $(shell echo
$(CROSS_COMPILE
) | cut
-d-
-f1
)
183 SUBARCH
:= $(shell uname
-m
)
185 SUBARCH
:= $(shell echo
$(SUBARCH
) | sed
-e s
/i
.86/i386
/ -e s
/sun4u
/sparc64
/ \
186 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
187 -e s
/s390x
/s390
/ -e s
/parisc64
/parisc
/ \
188 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ )
192 # Architecture as present in compile.h
193 UTS_MACHINE
:= $(ARCH
)
195 # SHELL used by kbuild
196 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
197 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
198 else echo sh
; fi
; fi
)
200 # Decide whether to build built-in, modular, or both.
201 # Normally, just do built-in.
206 # If we have only "make modules", don't compile built-in objects.
207 # When we're building modules with modversions, we need to consider
208 # the built-in objects during the descend as well, in order to
209 # make sure the checksums are uptodate before we record them.
211 ifeq ($(MAKECMDGOALS
),modules
)
212 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
215 # If we have "make <whatever> modules", compile modules
216 # in addition to whatever we do anyway.
217 # Just "make" or "make all" shall build modules as well
219 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
223 ifeq ($(MAKECMDGOALS
),)
227 export KBUILD_MODULES KBUILD_BUILTIN
228 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
231 # ---------------------------------------------------------------------------
233 # Normally, we echo the whole command before executing it. By making
234 # that echo $($(quiet)$(cmd)), we now have the possibility to set
235 # $(quiet) to choose other forms of output instead, e.g.
237 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
238 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
240 # If $(quiet) is empty, the whole command will be printed.
241 # If it is set to "quiet_", only the short version will be printed.
242 # If it is set to "silent_", nothing wil be printed at all, since
243 # the variable $(silent_cmd_cc_o_c) doesn't exist.
245 # A simple variant is to prefix commands with $(Q) - that's useful
246 # for commands that shall be hidden in non-verbose mode.
250 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
251 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
253 ifeq ($(KBUILD_VERBOSE
),1)
261 # If the user is running make -s (silent mode), suppress echoing of
264 ifneq ($(findstring s
,$(MAKEFLAGS
)),)
268 export quiet Q KBUILD_VERBOSE
271 # Look for make include files relative to root of kernel src
272 MAKEFLAGS
+= --include-dir
=$(srctree
)
278 # We need some generic definitions
279 include $(srctree
)/scripts
/Kbuild.
include
281 HOSTCFLAGS
+= $(call hostcc-option
,-Wall
-Wstrict-prototypes
-O2
-fomit-frame-pointer
,)
284 # For maximum performance (+ possibly random breakage, uncomment
289 # Make variables (CC, etc...)
291 AS
= $(CROSS_COMPILE
)as
292 CC
= $(CROSS_COMPILE
)gcc
295 AR
= $(CROSS_COMPILE
)ar
296 NM
= $(CROSS_COMPILE
)nm
297 STRIP
= $(CROSS_COMPILE
)strip
298 OBJCOPY
= $(CROSS_COMPILE
)objcopy
299 OBJDUMP
= $(CROSS_COMPILE
)objdump
300 PKG_CONFIG ?
= $(CROSS_COMPILE
)pkg-config
302 GENKSYMS
= scripts
/genksyms
/genksyms
303 DEPMOD
= /sbin
/depmod
304 KALLSYMS
= scripts
/kallsyms
308 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__
-Wbitwise
$(CF
)
310 CFLAGS_MODULE
= $(MODFLAGS
)
311 AFLAGS_MODULE
= $(MODFLAGS
)
317 # Use LINUXINCLUDE when you must reference the include/ directory.
318 # Needed to be compatible with the O= option
320 # Added only to final link stage of busybox binary
321 CFLAGS_busybox
:= $(CFLAGS_busybox
)
322 CPPFLAGS
:= $(CPPFLAGS
)
324 LDFLAGS
:= $(LDFLAGS
)
327 # Read KERNELRELEASE from .kernelrelease (if it exists)
328 KERNELRELEASE
= $(shell cat .kernelrelease
2> /dev
/null
)
329 KERNELVERSION
= $(VERSION
).
$(PATCHLEVEL
).
$(SUBLEVEL
)$(EXTRAVERSION
)
331 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
332 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
333 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
334 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
336 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
337 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
338 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
341 # When compiling out-of-tree modules, put MODVERDIR in the module
342 # tree rather than in the kernel tree. The kernel tree might
344 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
346 # Files to ignore in find ... statements
348 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
349 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn
--exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
351 # ===========================================================================
352 # Rules shared between *config targets and build targets
354 # Basic helpers built in scripts/
355 PHONY
+= scripts_basic
357 $(Q
)$(MAKE
) $(build
)=scripts
/basic
359 # To avoid any implicit rule to kick in, define an empty command.
360 scripts
/basic
/%: scripts_basic
;
362 # This target generates Kbuild's and Config.in's from *.c files
363 PHONY
+= gen_build_files
364 gen_build_files
: $(wildcard $(srctree
)/*/*.c
) $(wildcard $(srctree
)/*/*/*.c
)
365 $(Q
)$(srctree
)/scripts
/gen_build_files.sh
$(srctree
) $(objtree
)
367 # bbox: we have helpers in applets/
368 # we depend on scripts_basic, since scripts/basic/fixdep
369 # must be built before any other host prog
371 applets_dir
: scripts_basic gen_build_files
372 $(Q
)$(MAKE
) $(build
)=applets
374 applets
/%: applets_dir
;
376 PHONY
+= outputmakefile
377 # outputmakefile generates a Makefile in the output directory, if using a
378 # separate output directory. This allows convenient use of make in the
381 ifneq ($(KBUILD_SRC
),)
382 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
383 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
386 # To make sure we do not include .config for any of the *config targets
387 # catch them early, and hand them over to scripts/kconfig/Makefile
388 # It is allowed to specify more targets when calling make, including
389 # mixing *config targets and build targets.
390 # For example 'make oldconfig all'.
391 # Detect when mixed targets is specified, and make a second invocation
392 # of make so .config is not included in this case either (for *config).
394 no-dot-config-targets
:= clean mrproper
distclean \
395 cscope TAGS
tags help
%docs
396 #bbox# check% is removed from above
402 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
403 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
408 ifeq ($(KBUILD_EXTMOD
),)
409 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
411 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
417 ifeq ($(mixed-targets
),1)
418 # ===========================================================================
419 # We're called with mixed targets (*config and build targets).
420 # Handle them one by one.
423 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
426 ifeq ($(config-targets
),1)
427 # ===========================================================================
428 # *config targets only - make sure prerequisites are updated, and descend
429 # in scripts/kconfig to make the *config target
431 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
432 # KBUILD_DEFCONFIG may point out an alternative default configuration
433 # used for 'make defconfig'
434 -include $(srctree
)/arch
/$(ARCH
)/Makefile
435 export KBUILD_DEFCONFIG
437 config
: scripts_basic outputmakefile gen_build_files FORCE
439 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
440 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= .kernelrelease
442 %config
: scripts_basic outputmakefile gen_build_files FORCE
444 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
445 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= .kernelrelease
448 # ===========================================================================
449 # Build targets only - this includes busybox, arch specific targets, clean
450 # targets and others. In general all targets except *config targets.
452 ifeq ($(KBUILD_EXTMOD
),)
453 # Additional helpers built in scripts/
454 # Carefully list dependencies so we do not try to build scripts twice
457 scripts
: gen_build_files scripts_basic
include/config
/MARKER
458 $(Q
)$(MAKE
) $(build
)=$(@
)
460 scripts_basic
: include/autoconf.h
462 # Objects we will link into busybox / subdirs we need to visit
468 archival
/libarchive
/ \
471 coreutils
/libcoreutils
/ \
486 networking
/libiproute
/ \
495 util-linux
/volume_id
/ \
497 endif # KBUILD_EXTMOD
499 ifeq ($(dot-config
),1)
500 # In this section, we need .config
502 # Read in dependencies to all Kconfig* files, make sure to run
503 # oldconfig if changes are detected.
508 # If .config needs to be updated, it will be done via the dependency
509 # that autoconf has on .config.
510 # To avoid any implicit rule to kick in, define an empty command
511 .config .kconfig.d
: ;
513 # Now we can define CFLAGS etc according to .config
514 include $(srctree
)/Makefile.flags
516 # If .config is newer than include/autoconf.h, someone tinkered
517 # with it and forgot to run make oldconfig.
518 # If kconfig.d is missing then we are probarly in a cleaned tree so
519 # we execute the config step to be sure to catch updated Kconfig files
520 include/autoconf.h
: .kconfig.d .config
$(wildcard $(srctree
)/*/*.c
) $(wildcard $(srctree
)/*/*/*.c
) | gen_build_files
521 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
523 include/usage.h
: gen_build_files
526 # Dummy target needed, because used as prerequisite
527 include/autoconf.h
: ;
530 # The all: target is the default when no target is given on the
532 # This allow a user to issue only 'make' to build a kernel including modules
533 # Defaults busybox but it is usually overridden in the arch makefile
536 -include $(srctree
)/arch
/$(ARCH
)/Makefile
538 # arch Makefile may override CC so keep this after arch Makefile is included
539 #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
540 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
542 # Default kernel image to build when no specific target is given.
543 # KBUILD_IMAGE may be overruled on the commandline or
544 # set in the environment
545 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
547 export KBUILD_IMAGE ?
= busybox
550 # INSTALL_PATH specifies where to place the updated kernel and system map
551 # images. Default is /boot, but you can set it to other values
552 export INSTALL_PATH ?
= /boot
555 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
556 # relocations required by build roots. This is not defined in the
557 # makefile but the arguement can be passed to make if needed.
560 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
564 ifeq ($(KBUILD_EXTMOD
),)
565 busybox-dirs
:= $(patsubst %/,%,$(filter %/, $(core-y
) $(core-m
) $(libs-y
) $(libs-m
)))
567 busybox-alldirs
:= $(sort $(busybox-dirs
) $(patsubst %/,%,$(filter %/, \
568 $(core-n
) $(core-
) $(libs-n
) $(libs-
) \
571 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
572 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
573 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
574 libs-y
:= $(libs-y1
) $(libs-y2
)
577 # ---------------------------------------------------------------------------
578 # busybox is build from the objects selected by $(busybox-init) and
579 # $(busybox-main). Most are built-in.o files from top-level directories
580 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
581 # Ordering when linking is important, and $(busybox-init) must be first.
586 # +-< $(busybox-init)
587 # | +--< init/version.o + more
589 # +--< $(busybox-main)
590 # | +--< driver/built-in.o mm/built-in.o + more
592 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
594 # busybox version (uname -v) cannot be updated during normal
595 # descending-into-subdirs phase since we do not yet know if we need to
597 # Therefore this step is delayed until just before final link of busybox -
598 # except in the kallsyms case where it is done just before adding the
599 # symbols to the kernel.
601 # System.map is generated to document addresses of all kernel symbols
603 busybox-all
:= $(core-y
) $(libs-y
)
605 # Rule to link busybox - also used during CONFIG_KALLSYMS
606 # May be overridden by arch/$(ARCH)/Makefile
607 quiet_cmd_busybox__ ?
= LINK
$@
608 cmd_busybox__ ?
= $(srctree
)/scripts
/trylink \
611 "$(CFLAGS) $(CFLAGS_busybox)" \
612 "$(LDFLAGS) $(EXTRA_LDFLAGS)" \
617 # Generate System.map
618 quiet_cmd_sysmap
= SYSMAP
619 cmd_sysmap
= $(CONFIG_SHELL
) $(srctree
)/scripts
/mksysmap
622 # If CONFIG_KALLSYMS is set .version is already updated
623 # Generate System.map and verify that the content is consistent
624 # Use + in front of the busybox_version rule to silent warning with make -j2
625 # First command is ':' to allow us to use + in front of the rule
626 define rule_busybox__
628 $(call cmd
,busybox__
)
629 $(Q
)echo
'cmd_$@ := $(cmd_busybox__)' > $(@D
)/.
$(@F
).cmd
633 ifdef CONFIG_KALLSYMS
634 # Generate section listing all symbols and add it into busybox $(kallsyms.o)
635 # It's a three stage process:
636 # o .tmp_busybox1 has all symbols and sections, but __kallsyms is
638 # Running kallsyms on that gives us .tmp_kallsyms1.o with
639 # the right size - busybox version (uname -v) is updated during this step
640 # o .tmp_busybox2 now has a __kallsyms section of the right size,
641 # but due to the added section, some addresses have shifted.
642 # From here, we generate a correct .tmp_kallsyms2.o
643 # o The correct .tmp_kallsyms2.o is linked into the final busybox.
644 # o Verify that the System.map from busybox matches the map from
645 # .tmp_busybox2, just in case we did not generate kallsyms correctly.
646 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
647 # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a
648 # temporary bypass to allow the kernel to be built while the
649 # maintainers work out what went wrong with kallsyms.
651 ifdef CONFIG_KALLSYMS_EXTRA_PASS
657 kallsyms.o
:= .tmp_kallsyms
$(last_kallsyms
).o
659 define verify_kallsyms
660 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
661 echo
' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
662 $(cmd_sysmap
) .tmp_busybox
$(last_kallsyms
) .tmp_System.map
663 $(Q
)cmp
-s System.map .tmp_System.map || \
664 (echo Inconsistent kallsyms data
; \
665 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS
; \
666 rm .tmp_kallsyms
* ; /bin
/false
)
669 # Update busybox version before link
670 # Use + in front of this rule to silent warning about make -j1
671 # First command is ':' to allow us to use + in front of this rule
672 cmd_ksym_ld
= $(cmd_busybox__
)
675 +$(call cmd
,busybox_version
)
676 $(call cmd
,busybox__
)
677 $(Q
)echo
'cmd_$@ := $(cmd_busybox__)' > $(@D
)/.
$(@F
).cmd
680 # Generate .S file with all kernel symbols
681 quiet_cmd_kallsyms
= KSYM
$@
682 cmd_kallsyms
= $(NM
) -n
$< |
$(KALLSYMS
) \
683 $(if
$(CONFIG_KALLSYMS_ALL
),--all-symbols
) > $@
685 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o
: %.o
: %.S scripts FORCE
686 $(call if_changed_dep
,as_o_S
)
688 .tmp_kallsyms
%.S
: .tmp_busybox
% $(KALLSYMS
)
691 # .tmp_busybox1 must be complete except kallsyms, so update busybox version
692 .tmp_busybox1
: $(busybox-lds
) $(busybox-all
) FORCE
693 $(call if_changed_rule
,ksym_ld
)
695 .tmp_busybox2
: $(busybox-lds
) $(busybox-all
) .tmp_kallsyms1.o FORCE
696 $(call if_changed
,busybox__
)
698 .tmp_busybox3
: $(busybox-lds
) $(busybox-all
) .tmp_kallsyms2.o FORCE
699 $(call if_changed
,busybox__
)
701 # Needs to visit scripts/ before $(KALLSYMS) can be used.
702 $(KALLSYMS
): scripts
;
704 # Generate some data for debugging strange kallsyms problems
705 debug_kallsyms
: .tmp_map
$(last_kallsyms
)
707 .tmp_map
%: .tmp_busybox
% FORCE
708 ($(OBJDUMP
) -h
$< |
$(AWK
) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM
) $<) |
sort > $@
714 endif # ifdef CONFIG_KALLSYMS
716 # busybox image - including updated kernel symbols
717 busybox_unstripped
: $(busybox-all
) FORCE
718 $(call if_changed_rule
,busybox__
)
719 $(Q
)rm -f .old_version
721 busybox
: busybox_unstripped
722 ifeq ($(SKIP_STRIP
),y
)
725 $(Q
)$(STRIP
) -s
--remove-section
=.note
--remove-section
=.comment \
726 busybox_unstripped
-o
$@
727 # strip is confused by PIE executable and does not set exec bits
731 # The actual objects are generated when descending,
732 # make sure no implicit rule kicks in
733 $(sort $(busybox-all
)): $(busybox-dirs
) ;
735 # Handle descending into subdirectories listed in $(busybox-dirs)
736 # Preset locale variables to speed up the build process. Limit locale
737 # tweaks to this spot to avoid wrong language settings when running
738 # make menuconfig etc.
739 # Error messages still appears in the original language
741 PHONY
+= $(busybox-dirs
)
742 $(busybox-dirs
): prepare scripts
743 $(Q
)$(MAKE
) $(build
)=$@
745 # Build the kernel release string
746 # The KERNELRELEASE is stored in a file named .kernelrelease
747 # to be used when executing for example make install or make modules_install
749 # Take the contents of any files called localversion* and the config
750 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
751 # LOCALVERSION from the command line override all of this
754 space
:= $(nullstring
) # end of line
756 ___localver
= $(objtree
)/localversion
* $(srctree
)/localversion
*
757 __localver
= $(sort $(wildcard $(___localver
)))
758 # skip backup files (containing '~')
759 _localver
= $(foreach f
, $(__localver
), $(if
$(findstring ~
, $(f
)),,$(f
)))
761 localver
= $(subst $(space
),, \
762 $(shell cat
/dev
/null
$(_localver
)) \
763 $(patsubst "%",%,$(CONFIG_LOCALVERSION
)))
765 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
766 # and if the SCM is know a tag from the SCM is appended.
767 # The appended tag is determinded by the SCM used.
769 # Currently, only git is supported.
770 # Other SCMs can edit scripts/setlocalversion and add the appropriate
772 ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO
773 _localver-auto
= $(shell $(CONFIG_SHELL
) \
774 $(srctree
)/scripts
/setlocalversion
$(srctree
))
775 localver-auto
= $(LOCALVERSION
)$(_localver-auto
)
778 localver-full
= $(localver
)$(localver-auto
)
780 # Store (new) KERNELRELASE string in .kernelrelease
781 kernelrelease
= $(KERNELVERSION
)$(localver-full
)
782 .kernelrelease
: FORCE
784 $(Q
)echo
$(kernelrelease
) > $@
787 # Things we need to do before we recursively start building the kernel
788 # or the modules are listed in "prepare".
789 # A multi level approach is used. prepareN is processed before prepareN-1.
790 # archprepare is used in arch Makefiles and when processed asm symlink,
791 # version.h and scripts_basic is processed / created.
793 # Listed in dependency order
794 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
796 # prepare-all is deprecated, use prepare as valid replacement
799 # prepare3 is used to check if we are building in a separate output directory,
801 # 1) Check that make has not been executed in the kernel src $(srctree)
802 # 2) Create the include2 directory, used for the second asm symlink
803 prepare3
: .kernelrelease
804 ifneq ($(KBUILD_SRC
),)
805 @echo
' Using $(srctree) as source for busybox'
806 $(Q
)if
[ -f
$(srctree
)/.config
]; then \
807 echo
" $(srctree) is not clean, please run 'make mrproper'";\
808 echo
" in the '$(srctree)' directory.";\
811 $(Q
)if
[ ! -d include2
]; then mkdir
-p include2
; fi
;
812 $(Q
)ln
-fsn
$(srctree
)/include/asm-
$(ARCH
) include2
/asm
815 # prepare2 creates a makefile if using a separate output directory
816 prepare2
: prepare3 outputmakefile
818 prepare1
: prepare2
include/config
/MARKER
819 ifneq ($(KBUILD_MODULES
),)
820 $(Q
)mkdir
-p
$(MODVERDIR
)
821 $(Q
)rm -f
$(MODVERDIR
)/*
824 archprepare
: prepare1 scripts_basic applets_dir
826 prepare0
: archprepare FORCE
827 $(Q
)$(MAKE
) $(build
)=.
829 # All the preparing..
830 prepare prepare-all
: prepare0
832 # Leave this as default for preprocessing busybox.lds.S, which is now
833 # done in arch/$(ARCH)/kernel/Makefile
835 export CPPFLAGS_busybox.lds
+= -P
-C
-U
$(ARCH
)
837 # FIXME: The asm symlink changes when $(ARCH) changes. That's
838 # hard to detect, but I suppose "make mrproper" is a good idea
839 # before switching between archs anyway.
842 #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
843 #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi;
844 #bbox# @ln -fsn asm-$(ARCH) $@
846 # Split autoconf.h into include/linux/config/*
847 quiet_cmd_gen_bbconfigopts
= GEN
include/bbconfigopts.h
848 cmd_gen_bbconfigopts
= $(srctree
)/scripts
/mkconfigs
include/bbconfigopts.h
include/bbconfigopts_bz2.h
849 quiet_cmd_split_autoconf
= SPLIT
include/autoconf.h
-> include/config
/*
850 cmd_split_autoconf
= scripts
/basic
/split-include
include/autoconf.h
include/config
851 #bbox# piggybacked generation of few .h files
852 include/config
/MARKER
: scripts
/basic
/split-include
include/autoconf.h
853 $(call cmd
,split_autoconf
)
854 $(call cmd
,gen_bbconfigopts
)
857 # Generate some files
858 # ---------------------------------------------------------------------------
860 # KERNELRELEASE can change from a few different places, meaning version.h
861 # needs to be updated, so this check is forced on all builds
865 define filechk_version.h
866 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
867 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
870 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
871 echo \
#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
872 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
876 # ---------------------------------------------------------------------------
880 @echo
'*** Warning: make $@ is unnecessary now.'
882 # ---------------------------------------------------------------------------
885 ifdef _BB_DISABLED_CONFIG_MODULES
887 # By default, build modules as well
894 modules
: $(busybox-dirs
) $(if
$(KBUILD_BUILTIN
),busybox
)
895 @echo
' Building modules, stage 2.';
896 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modpost
899 # Target to prepare building external modules
900 PHONY
+= modules_prepare
901 modules_prepare
: prepare scripts
903 # Target to install modules
904 PHONY
+= modules_install
905 modules_install
: _modinst_ _modinst_post
909 @if
[ -z
"`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
910 echo
"Warning: you may need to install module-init-tools"; \
911 echo
"See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
914 @
rm -rf
$(MODLIB
)/kernel
915 @
rm -f
$(MODLIB
)/source
916 @mkdir
-p
$(MODLIB
)/kernel
917 @ln
-s
$(srctree
) $(MODLIB
)/source
918 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
919 rm -f
$(MODLIB
)/build
; \
920 ln
-s
$(objtree
) $(MODLIB
)/build
; \
922 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modinst
924 # If System.map exists, run depmod. This deliberately does not have a
925 # dependency on System.map since that would run the dependency tree on
926 # busybox. This depmod is only for convenience to give the initial
927 # boot a modules.dep even before / is mounted read-write. However the
928 # boot script depmod is the master version.
929 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
932 depmod_opts
:= -b
$(INSTALL_MOD_PATH
) -r
934 PHONY
+= _modinst_post
935 _modinst_post
: _modinst_
936 if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then
$(DEPMOD
) -ae
-F System.map
$(depmod_opts
) $(KERNELRELEASE
); fi
938 else # CONFIG_MODULES
940 # Modules not configured
941 # ---------------------------------------------------------------------------
943 modules modules_install
: FORCE
945 @echo
"The present busybox configuration has modules disabled."
946 @echo
"Type 'make config' and enable loadable module support."
947 @echo
"Then build a kernel with module support enabled."
951 endif # CONFIG_MODULES
954 # Cleaning is done on three levels.
955 # make clean Delete most generated files
956 # Leave enough to build external modules
957 # make mrproper Delete the current configuration, and all generated files
958 # make distclean Remove editor backup files, patch leftover files and the like
960 # Directories & files removed with 'make clean'
961 CLEAN_DIRS
+= $(MODVERDIR
) _install
0_lib
962 CLEAN_FILES
+= busybox busybox_unstripped
* busybox.links \
963 System.map .kernelrelease \
964 .tmp_kallsyms
* .tmp_version .tmp_busybox
* .tmp_System.map
966 # Directories & files removed with 'make mrproper'
967 MRPROPER_DIRS
+= include/config include2
968 MRPROPER_FILES
+= .config .config.old
include/asm .version .old_version \
969 include/NUM_APPLETS.h \
971 include/bbconfigopts.h \
972 include/bbconfigopts_bz2.h \
973 include/usage_compressed.h \
974 include/applet_tables.h \
978 .kernelrelease Module.symvers
tags TAGS cscope
* \
981 # clean - Delete most, but leave enough to build external modules
983 clean: rm-dirs
:= $(CLEAN_DIRS
)
984 clean: rm-files
:= $(CLEAN_FILES
)
985 clean-dirs
:= $(addprefix _clean_
,$(srctree
) $(busybox-alldirs
))
987 PHONY
+= $(clean-dirs
) clean archclean
989 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
991 clean: archclean
$(clean-dirs
)
994 @find .
$(RCS_FIND_IGNORE
) \
995 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
996 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
) \
997 -type f
-print | xargs
rm -f
1000 doc-clean
: rm-files
:= docs
/busybox.pod \
1001 docs
/BusyBox.html docs
/busybox
.1 docs
/BusyBox.txt
1005 # mrproper - Delete all generated files, including .config
1007 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1008 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1009 mrproper-dirs
:= $(addprefix _mrproper_
,scripts
)
1011 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1013 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1015 mrproper
: clean archmrproper
$(mrproper-dirs
)
1018 @find .
-name Config.src | sed
's/.src$$/.in/' | xargs
-r
rm -f
1019 @find .
-name Kbuild.src | sed
's/.src$$//' | xargs
-r
rm -f
1026 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1027 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1028 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1029 -o
-name
'.*.rej' -o
-name
'*.tmp' -o
-size
0 \
1030 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
1031 -type f
-print | xargs
rm -f
1034 # Packaging of the kernel to various formats
1035 # ---------------------------------------------------------------------------
1036 # rpm target kept for backward compatibility
1037 package-dir
:= $(srctree
)/scripts
/package
1040 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1042 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1045 # Brief documentation of the typical targets used
1046 # ---------------------------------------------------------------------------
1048 boards
:= $(wildcard $(srctree
)/configs
/*_defconfig
)
1049 boards
:= $(notdir $(boards
))
1051 -include $(srctree
)/Makefile.help
1053 # Documentation targets
1054 # ---------------------------------------------------------------------------
1055 %docs
: scripts_basic FORCE
1056 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1058 else # KBUILD_EXTMOD
1061 # External module support.
1062 # When building external modules the kernel used as basis is considered
1063 # read-only, and no consistency checks are made and the make
1064 # system is not used on the basis kernel. If updates are required
1065 # in the basis kernel ordinary make commands (without M=...) must
1068 # The following are the only valid targets when building external
1070 # make M=dir clean Delete all automatically generated files
1071 # make M=dir modules Make all modules in specified dir
1072 # make M=dir Same as 'make M=dir modules'
1073 # make M=dir modules_install
1074 # Install the modules build in the module directory
1075 # Assumes install directory is already created
1077 # We are always building modules
1079 PHONY
+= crmodverdir
1081 $(Q
)mkdir
-p
$(MODVERDIR
)
1082 $(Q
)rm -f
$(MODVERDIR
)/*
1084 PHONY
+= $(objtree
)/Module.symvers
1085 $(objtree
)/Module.symvers
:
1086 @
test -e
$(objtree
)/Module.symvers ||
( \
1088 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1089 echo
" is missing; modules will have no dependencies and modversions."; \
1092 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1093 PHONY
+= $(module-dirs
) modules
1094 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1095 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1097 modules
: $(module-dirs
)
1098 @echo
' Building modules, stage 2.';
1099 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modpost
1101 PHONY
+= modules_install
1102 modules_install
: _emodinst_ _emodinst_post
1104 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1107 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1108 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modinst
1110 # Run depmod only is we have System.map and depmod is executable
1111 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1112 cmd_depmod
= if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then \
1113 $(DEPMOD
) -ae
-F System.map \
1114 $(if
$(strip $(INSTALL_MOD_PATH
)), \
1115 -b
$(INSTALL_MOD_PATH
) -r
) \
1119 PHONY
+= _emodinst_post
1120 _emodinst_post
: _emodinst_
1123 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1125 PHONY
+= $(clean-dirs
) clean
1127 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1129 clean: rm-dirs
:= $(MODVERDIR
)
1130 clean: $(clean-dirs
)
1132 @find
$(KBUILD_EXTMOD
) $(RCS_FIND_IGNORE
) \
1133 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1134 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
) \
1135 -type f
-print | xargs
rm -f
1138 PHONY
+= prepare scripts
1141 endif # KBUILD_EXTMOD
1143 # Generate tags for editors
1144 # ---------------------------------------------------------------------------
1146 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1147 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1148 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1150 ifeq ($(src
),$(obj
))
1153 __srctree
= $(srctree
)/
1156 ifeq ($(ALLSOURCE_ARCHS
),)
1158 ALLINCLUDE_ARCHS
:= $(ARCH
) $(SUBARCH
)
1160 ALLINCLUDE_ARCHS
:= $(ARCH
)
1163 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1164 ALLINCLUDE_ARCHS
:= $(ALLSOURCE_ARCHS
)
1167 ALLSOURCE_ARCHS
:= $(ARCH
)
1170 ( find
$(__srctree
) $(RCS_FIND_IGNORE
) \
1171 \
( -name
include -o
-name arch \
) -prune
-o \
1172 -name
'*.[chS]' -print; \
1173 for ARCH in
$(ALLSOURCE_ARCHS
) ; do \
1174 find
$(__srctree
)arch
/$${ARCH} $(RCS_FIND_IGNORE
) \
1175 -name
'*.[chS]' -print; \
1177 find
$(__srctree
)security
/selinux
/include $(RCS_FIND_IGNORE
) \
1178 -name
'*.[chS]' -print; \
1179 find
$(__srctree
)include $(RCS_FIND_IGNORE
) \
1180 \
( -name config
-o
-name
'asm-*' \
) -prune \
1181 -o
-name
'*.[chS]' -print; \
1182 for ARCH in
$(ALLINCLUDE_ARCHS
) ; do \
1183 find
$(__srctree
)include/asm-
$${ARCH} $(RCS_FIND_IGNORE
) \
1184 -name
'*.[chS]' -print; \
1186 find
$(__srctree
)include/asm-generic
$(RCS_FIND_IGNORE
) \
1187 -name
'*.[chS]' -print )
1190 quiet_cmd_cscope-file
= FILELST cscope.files
1191 cmd_cscope-file
= (echo \
-k
; echo \
-q
; $(all-sources
)) > cscope.files
1193 quiet_cmd_cscope
= MAKE cscope.out
1194 cmd_cscope
= cscope
-b
1197 $(call cmd
,cscope-file
)
1200 quiet_cmd_TAGS
= MAKE
$@
1203 ETAGSF
=`etags --version | grep -i exuberant >/dev/null && \
1204 echo "-I __initdata,__exitdata,__acquires,__releases \
1205 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1206 --extra=+f --c-kinds=+px"`; \
1207 $(all-sources
) | xargs etags
$$ETAGSF -a
1214 quiet_cmd_tags
= MAKE
$@
1217 CTAGSF
=`ctags --version | grep -i exuberant >/dev/null && \
1218 echo "-I __initdata,__exitdata,__acquires,__releases \
1219 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1220 --extra=+f --c-kinds=+px"`; \
1221 $(all-sources
) | xargs ctags
$$CTAGSF -a
1228 # Scripts to check various things for consistency
1229 # ---------------------------------------------------------------------------
1232 find
* $(RCS_FIND_IGNORE
) \
1233 -name
'*.[hcS]' -type f
-print |
sort \
1234 | xargs
$(PERL
) -w scripts
/checkincludes.pl
1237 find
* $(RCS_FIND_IGNORE
) \
1238 -name
'*.[hcS]' -type f
-print |
sort \
1239 | xargs
$(PERL
) -w scripts
/checkversion.pl
1242 $(PERL
) $(srctree
)/scripts
/namespace.pl
1244 endif #ifeq ($(config-targets),1)
1245 endif #ifeq ($(mixed-targets),1)
1249 $(OBJDUMP
) -d busybox
$$(find .
-name
'*.ko') | \
1250 $(PERL
) $(src
)/scripts
/checkstack.pl
$(ARCH
)
1253 $(if
$(wildcard .kernelrelease
), $(Q
)echo
$(KERNELRELEASE
), \
1254 $(error kernelrelease not valid
- run
'make *config' to update it
))
1256 @echo
$(KERNELVERSION
)
1259 # ---------------------------------------------------------------------------
1260 # Single targets are compatible with:
1261 # - build whith mixed source and output
1262 # - build with separate output dir 'make O=...'
1263 # - external modules
1265 # target-dir => where to store outputfile
1266 # build-dir => directory in kernel source tree to use
1268 ifeq ($(KBUILD_EXTMOD
),)
1269 build-dir
= $(patsubst %/,%,$(dir $@
))
1270 target-dir
= $(dir $@
)
1272 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1273 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1274 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1277 %.s
: %.c prepare scripts FORCE
1278 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1279 %.i
: %.c prepare scripts FORCE
1280 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1281 %.o
: %.c prepare scripts FORCE
1282 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1283 %.lst
: %.c prepare scripts FORCE
1284 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1285 %.s
: %.S prepare scripts FORCE
1286 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1287 %.o
: %.S prepare scripts FORCE
1288 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1291 %/: prepare scripts FORCE
1292 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1293 $(build
)=$(build-dir
)
1294 /: prepare scripts FORCE
1295 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1296 $(build
)=$(build-dir
)
1298 %.ko
: prepare scripts FORCE
1299 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1300 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1301 $(Q
)$(MAKE
) -rR
-f
$(srctree
)/scripts
/Makefile.modpost
1303 # FIXME Should go into a make.lib or something
1304 # ===========================================================================
1306 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1307 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1309 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1310 cmd_rmfiles
= rm -f
$(rm-files
)
1313 a_flags
= -Wp
,-MD
,$(depfile
) $(AFLAGS
) $(AFLAGS_KERNEL
) \
1314 $(NOSTDINC_FLAGS
) $(CPPFLAGS
) \
1315 $(modkern_aflags
) $(EXTRA_AFLAGS
) $(AFLAGS_
$(*F
).o
)
1317 quiet_cmd_as_o_S
= AS
$@
1318 cmd_as_o_S
= $(CC
) $(a_flags
) -c
-o
$@
$<
1320 # read all saved command lines
1322 targets
:= $(wildcard $(sort $(targets
)))
1323 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1325 ifneq ($(cmd_files
),)
1326 $(cmd_files
): ; # Do not try to update included dependency files
1327 include $(cmd_files
)
1330 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1332 # $(Q)$(MAKE) $(clean)=dir
1333 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1335 endif # skip-makefile
1340 -include $(srctree
)/Makefile.custom
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.