7 # To see a list of typical targets execute "make help"
8 # More info can be located in ./Documentation/kbuild
9 # Comments in this file are targeted only to the developer, do not
10 # expect to learn how to build the kernel reading this file.
12 # We are using a recursive build, so we need to do a little thinking
13 # to get the ordering right.
15 # Most importantly: sub-Makefiles should only ever modify files in
16 # their own directory. If in some directory we have a dependency on
17 # a file in another dir (which doesn't happen often, but it's of
18 # unavoidable when linking the built-in.o targets which finally
19 # turn into vmlinux), we will call a sub make in that other dir, and
20 # after that we are sure that everything which is in that other dir
23 # The only cases where we need to modify files which have global
24 # effects are thus separated out and done before the recursive
25 # descending is started. They are now explicitly listed as the
28 KERNELRELEASE
=$(VERSION
).
$(PATCHLEVEL
).
$(SUBLEVEL
)$(EXTRAVERSION
)
30 # SUBARCH tells the usermode build what the underlying arch is. That is set
31 # first, and if a usermode build is happening, the "ARCH=um" on the command
32 # line overrides the setting of ARCH below. If a native build is happening,
33 # then ARCH is assigned, getting whatever value it gets normally, and
34 # SUBARCH is subsequently ignored.
39 KERNELPATH
=kernel-
$(shell echo
$(KERNELRELEASE
) | sed
-e
"s/-//g")
41 UTS_MACHINE
:= $(ARCH
)
43 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
44 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
45 else echo sh
; fi
; fi
)
50 HOSTCFLAGS
= -Wall
-Wstrict-prototypes
-O2
-fomit-frame-pointer
55 # That's our default target when none is given on the command line
59 # Decide whether to build built-in, modular, or both.
60 # Normally, just do built-in.
65 # If we have only "make modules", don't compile built-in objects.
67 ifeq ($(MAKECMDGOALS
),modules
)
71 # If we have "make <whatever> modules", compile modules
72 # in addition to whatever we do anyway.
74 ifneq ($(filter modules
,$(MAKECMDGOALS
)),)
78 # Just "make" or "make all" shall build modules as well
80 ifeq ($(MAKECMDGOALS
),)
84 ifneq ($(filter all,$(MAKECMDGOALS
)),)
88 export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE
91 # ---------------------------------------------------------------------------
93 # Normally, we echo the whole command before executing it. By making
94 # that echo $($(quiet)$(cmd)), we now have the possibility to set
95 # $(quiet) to choose other forms of output instead, e.g.
97 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
98 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
100 # If $(quiet) is empty, the whole command will be printed.
101 # If it is set to "quiet_", only the short version will be printed.
102 # If it is set to "silent_", nothing wil be printed at all, since
103 # the variable $(silent_cmd_cc_o_c) doesn't exist.
105 # For now, leave verbose as default
107 ifndef KBUILD_VERBOSE
111 MAKEFLAGS
+= --no-print-directory
113 # For maximum performance (+ possibly random breakage, uncomment
118 # If the user wants quiet mode, echo short versions of the commands
121 ifeq ($(KBUILD_VERBOSE
),1)
129 # If the user is running make -s (silent mode), suppress echoing of
132 ifneq ($(findstring s
,$(MAKEFLAGS
)),)
136 export quiet Q KBUILD_VERBOSE
138 # Paths to obj / src tree
145 export srctree objtree
147 # Make variables (CC, etc...)
149 AS
= $(CROSS_COMPILE
)as
150 LD
= $(CROSS_COMPILE
)ld
151 CC
= $(CROSS_COMPILE
)gcc
153 AR
= $(CROSS_COMPILE
)ar
154 NM
= $(CROSS_COMPILE
)nm
155 STRIP
= $(CROSS_COMPILE
)strip
156 OBJCOPY
= $(CROSS_COMPILE
)objcopy
157 OBJDUMP
= $(CROSS_COMPILE
)objdump
159 GENKSYMS
= /sbin
/genksyms
160 DEPMOD
= /sbin
/depmod
161 KALLSYMS
= /sbin
/kallsyms
164 CFLAGS_MODULE
= $(MODFLAGS
)
165 AFLAGS_MODULE
= $(MODFLAGS
)
168 NOSTDINC_FLAGS
= -nostdinc
-iwithprefix
include
170 CPPFLAGS
:= -D__KERNEL__
-Iinclude
171 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes
-Wno-trigraphs
-O2 \
172 -fomit-frame-pointer
-fno-strict-aliasing
-fno-common
173 AFLAGS
:= -D__ASSEMBLY__
$(CPPFLAGS
)
175 export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
176 CONFIG_SHELL TOPDIR HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
177 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
178 HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB
180 export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
181 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
182 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
184 # The temporary file to save gcc -MD generated dependencies must not
186 depfile
= $(subst $(comma
),_
,$(@D
)/.
$(@F
).d
)
188 noconfig_targets
:= xconfig menuconfig config oldconfig randconfig \
189 defconfig allyesconfig allnoconfig allmodconfig \
190 clean mrproper
distclean \
191 help
tags TAGS sgmldocs psdocs pdfdocs htmldocs \
192 checkconfig checkhelp checkincludes
194 RCS_FIND_IGNORE
:= \
( -name SCCS
-o
-name BitKeeper
-o
-name .svn
-o
-name CVS \
) -prune
-o
195 RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn
--exclude CVS
197 # Helpers built in scripts/
198 # ---------------------------------------------------------------------------
200 scripts
/docproc scripts
/fixdep scripts
/split-include
: scripts
;
204 +@
$(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=scripts
206 # Objects we will link into vmlinux / subdirs we need to visit
207 # ---------------------------------------------------------------------------
210 drivers-y
:= drivers
/ sound
/
216 ifeq ($(filter $(noconfig_targets
),$(MAKECMDGOALS
)),)
218 export include_config
:= 1
224 include arch
/$(ARCH
)/Makefile
226 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/
228 SUBDIRS
+= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
229 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
230 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
232 ALL_SUBDIRS
:= $(sort $(SUBDIRS
) $(patsubst %/,%,$(filter %/, \
234 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
235 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
237 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
238 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
239 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
240 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
241 libs-y
:= $(patsubst %/, %/lib.a
, $(libs-y
))
245 # Here goes the main Makefile
246 # ===========================================================================
248 # If the user gave a *config target, it'll be handled in another
249 # section below, since in this case we cannot include .config
250 # Same goes for other targets like clean/mrproper etc, which
251 # don't need .config, either
253 # In this section, we need .config
258 export EXPORT_FLAGS
:= -DEXPORT_SYMTAB
262 # INSTALL_PATH specifies where to place the updated kernel and system map
263 # images. Uncomment if you want to place them anywhere other than root.
266 #export INSTALL_PATH=/boot
269 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
270 # relocations required by build roots. This is not defined in the
271 # makefile but the arguement can be passed to make if needed.
274 MODLIB
:= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
278 # ---------------------------------------------------------------------------
280 # This is a bit tricky: If we need to relink vmlinux, we want
281 # the version number incremented, which means recompile init/version.o
282 # and relink init/init.o. However, we cannot do this during the
283 # normal descending-into-subdirs phase, since at that time
284 # we cannot yet know if we will need to relink vmlinux.
285 # So we descend into init/ inside the rule for vmlinux again.
287 vmlinux-objs
:= $(HEAD
) $(init-y
) $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
289 quiet_cmd_vmlinux__
= LD
$@
291 $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
) $(HEAD
) $(init-y
) \
298 $(filter .tmp_kallsyms
%,$^
) \
302 # set -e makes the rule exit immediately on error
304 define rule_vmlinux__
306 $(if
$(filter .tmp_kallsyms
%,$^
),,
307 echo
' Generating build number'
308 . scripts
/mkversion
> .tmp_version
309 mv
-f .tmp_version .version
310 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=init
312 $(call cmd
,vmlinux__
)
313 echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
318 $(NM
) $@ | grep
-v
'\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' |
sort > System.map
321 LDFLAGS_vmlinux
+= -T arch
/$(ARCH
)/vmlinux.lds.s
323 # Generate section listing all symbols and add it into vmlinux
324 # It's a three stage process:
325 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
327 # Running kallsyms on that gives as .tmp_kallsyms1.o with
329 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
330 # but due to the added section, some addresses have shifted
331 # From here, we generate a correct .tmp_kallsyms2.o
332 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
334 ifdef CONFIG_KALLSYMS
336 kallsyms.o
:= .tmp_kallsyms2.o
338 quiet_cmd_kallsyms
= KSYM
$@
339 cmd_kallsyms
= $(KALLSYMS
) $< > $@
341 .tmp_kallsyms1.o
: .tmp_vmlinux1
344 .tmp_kallsyms2.o
: .tmp_vmlinux2
347 .tmp_vmlinux1
: $(vmlinux-objs
) arch
/$(ARCH
)/vmlinux.lds.s FORCE
348 $(call if_changed_rule
,vmlinux__
)
350 .tmp_vmlinux2
: $(vmlinux-objs
) .tmp_kallsyms1.o arch
/$(ARCH
)/vmlinux.lds.s FORCE
351 $(call if_changed_rule
,vmlinux__
)
355 # Finally the vmlinux rule
357 vmlinux
: $(vmlinux-objs
) $(kallsyms.o
) arch
/$(ARCH
)/vmlinux.lds.s FORCE
358 $(call if_changed_rule
,vmlinux
)
360 # The actual objects are generated when descending,
361 # make sure no implicit rule kicks in
363 $(sort $(vmlinux-objs
)): $(SUBDIRS
) ;
365 # Handle descending into subdirectories listed in $(SUBDIRS)
368 $(SUBDIRS
): .hdepend prepare
369 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=$@
371 # Things we need done before we descend to build or make
372 # module versions are listed in "prepare"
375 prepare
: include/linux
/version.h
include/asm
include/config
/MARKER
376 @echo
' Starting the build. KBUILD_BUILTIN=$(KBUILD_BUILTIN) KBUILD_MODULES=$(KBUILD_MODULES)'
378 # This can be used by arch/$ARCH/Makefile to preprocess
379 # their vmlinux.lds.S file
381 AFLAGS_vmlinux.lds.o
+= -P
-C
-U
$(ARCH
)
383 arch
/$(ARCH
)/vmlinux.lds.s
: %.s
: %.S scripts FORCE
384 $(call if_changed_dep
,as_s_S
)
386 targets
+= arch
/$(ARCH
)/vmlinux.lds.s
389 # ---------------------------------------------------------------------------
391 %.s
: %.c scripts FORCE
392 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=$(@D
) $@
393 %.i
: %.c scripts FORCE
394 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=$(@D
) $@
395 %.o
: %.c scripts FORCE
396 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=$(@D
) $@
397 %.lst
: %.c scripts FORCE
398 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=$(@D
) $@
399 %.s
: %.S scripts FORCE
400 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=$(@D
) $@
401 %.o
: %.S scripts FORCE
402 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=$(@D
) $@
404 # FIXME: The asm symlink changes when $(ARCH) changes. That's
405 # hard to detect, but I suppose "make mrproper" is a good idea
406 # before switching between archs anyway.
409 @echo
' Making asm->asm-$(ARCH) symlink'
410 @ln
-s asm-
$(ARCH
) $@
412 # Split autoconf.h into include/linux/config/*
414 include/config
/MARKER
: scripts
/split-include
include/linux
/autoconf.h
415 @echo
' SPLIT include/linux/autoconf.h -> include/config/*'
416 @scripts
/split-include
include/linux
/autoconf.h
include/config
419 # if .config is newer than include/linux/autoconf.h, someone tinkered
420 # with it and forgot to run make oldconfig
422 include/linux
/autoconf.h
: .config
423 +@
$(call descend
,scripts
/kconfig
,scripts
/kconfig
/conf
)
424 .
/scripts
/kconfig
/conf
-s arch
/$(ARCH
)/Kconfig
426 # Generate some files
427 # ---------------------------------------------------------------------------
429 # version.h changes when $(KERNELRELEASE) etc change, as defined in
434 include/linux
/version.h
: Makefile
435 @if expr length
"$(KERNELRELEASE)" \
> $(uts_len
) >/dev
/null
; then \
436 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
439 @echo
-n
' Generating $@'
440 @
(echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
441 echo \
#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
442 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
444 @
$(update-if-changed
)
446 # Generate module versions
447 # ---------------------------------------------------------------------------
449 # The targets are still named depend / dep for traditional
450 # reasons, but the only thing we do here is generating
451 # the module version checksums.
453 .PHONY
: depend dep
$(patsubst %,_sfdep_
%,$(SUBDIRS
))
457 # .hdepend is our (misnomed) marker for whether we've
458 # generated module versions
460 make-versions
:= $(strip $(if
$(filter dep depend
,$(MAKECMDGOALS
)),1) \
461 $(if
$(wildcard .hdepend
),,1))
463 .hdepend
: prepare FORCE
464 ifneq ($(make-versions
),)
465 @
$(MAKE
) include/linux
/modversions.h
469 ifdef CONFIG_MODVERSIONS
471 # Update modversions.h, but only if it would change.
473 .PHONY
: __rm_tmp_export-objs
474 __rm_tmp_export-objs
:
475 @
rm -rf .tmp_export-objs
477 include/linux
/modversions.h
: $(patsubst %,_modver_
%,$(SUBDIRS
))
478 @echo
-n
' Generating $@'
479 @
( echo
"#ifndef _LINUX_MODVERSIONS_H";\
480 echo
"#define _LINUX_MODVERSIONS_H"; \
481 echo
"#include <linux/modsetver.h>"; \
482 cd .tmp_export-objs
>/dev
/null
; \
483 for f in
`find modules -name \*.ver -print | sort`; do \
484 echo
"#include <linux/$${f}>"; \
490 .PHONY
: $(patsubst %, _modver_
%, $(SUBDIRS
))
491 $(patsubst %, _modver_
%, $(SUBDIRS
)): __rm_tmp_export-objs
492 $(Q
)$(MAKE
) -f scripts
/Makefile.modver obj
=$(patsubst _modver_
%,%,$@
)
494 else # !CONFIG_MODVERSIONS
496 .PHONY
: include/linux
/modversions.h
498 include/linux
/modversions.h
:
500 endif # CONFIG_MODVERSIONS
502 # ---------------------------------------------------------------------------
509 ifdef CONFIG_MODVERSIONS
510 MODFLAGS
+= -include include/linux
/modversions.h
518 .PHONY
: modules_install
519 modules_install
: _modinst_
$(patsubst %, _modinst_
%, $(SUBDIRS
)) _modinst_post
523 @
rm -rf
$(MODLIB
)/kernel
524 @
rm -f
$(MODLIB
)/build
525 @mkdir
-p
$(MODLIB
)/kernel
526 @ln
-s
$(TOPDIR
) $(MODLIB
)/build
528 # If System.map exists, run depmod. This deliberately does not have a
529 # dependency on System.map since that would run the dependency tree on
530 # vmlinux. This depmod is only for convenience to give the initial
531 # boot a modules.dep even before / is mounted read-write. However the
532 # boot script depmod is the master version.
533 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
536 depmod_opts
:= -b
$(INSTALL_MOD_PATH
) -r
538 .PHONY
: _modinst_post
540 if
[ -r System.map
]; then
$(DEPMOD
) -ae
-F System.map
$(depmod_opts
) $(KERNELRELEASE
); fi
542 .PHONY
: $(patsubst %, _modinst_
%, $(SUBDIRS
))
543 $(patsubst %, _modinst_
%, $(SUBDIRS
)) :
544 $(Q
)$(MAKE
) -f scripts
/Makefile.modinst obj
=$(patsubst _modinst_
%,%,$@
)
545 else # CONFIG_MODULES
547 # Modules not configured
548 # ---------------------------------------------------------------------------
550 modules modules_install
: FORCE
552 @echo
"The present kernel configuration has modules disabled."
553 @echo
"Type 'make config' and enable loadable module support."
554 @echo
"Then build a kernel with module support enabled."
558 endif # CONFIG_MODULES
560 # Generate asm-offsets.h
561 # ---------------------------------------------------------------------------
563 define generate-asm-offsets.h
565 echo
"#ifndef __ASM_OFFSETS_H__"; \
566 echo
"#define __ASM_OFFSETS_H__"; \
568 echo
" * DO NOT MODIFY."; \
570 echo
" * This file was generated by arch/$(ARCH)/Makefile"; \
574 sed
-ne
"/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
580 # ---------------------------------------------------------------------------
582 # If you do a make spec before packing the tarball you can rpm -ta it
585 . scripts
/mkspec
>kernel.spec
587 # Build a tar ball, generate an rpm from it and pack the result
588 # There arw two bits of magic here
589 # 1) The use of /. to avoid tar packing just the symlink
590 # 2) Removing the .dep files as they have source paths in them that
591 # will become invalid
594 find .
$(RCS_FIND_IGNORE
) \
595 \
( -size
0 -o
-name .depend
-o
-name .hdepend \
) \
596 -type f
-print | xargs
rm -f
599 ln
-sf
$(TOPDIR
) $(KERNELPATH
) ; \
600 tar -cvz
$(RCS_TAR_IGNORE
) -f
$(KERNELPATH
).
tar.gz
$(KERNELPATH
)/.
; \
603 . scripts
/mkversion
> .version
; \
604 rpm
-ta
$(TOPDIR
)/..
/$(KERNELPATH
).
tar.gz
; \
605 rm $(TOPDIR
)/..
/$(KERNELPATH
).
tar.gz
607 else # ifdef include_config
609 ifeq ($(filter-out $(noconfig_targets
),$(MAKECMDGOALS
)),)
611 # Targets which don't need .config
612 # ===========================================================================
614 # These targets basically have their own Makefile - not quite, but at
615 # least its own exclusive section in the same Makefile. The reason for
616 # this is the following:
617 # To know the configuration, the main Makefile has to include
618 # .config. That's a obviously a problem when .config doesn't exist
619 # yet, but that could be kludged around with only including it if it
621 # However, the larger problem is: If you run make *config, make will
622 # include the old .config, then execute your *config. It will then
623 # notice that a piece it included (.config) did change and restart from
624 # scratch. Which will cause execution of *config again. You get the
626 # If we don't explicitly let the Makefile know that .config is changed
627 # by *config (the old way), it won't reread .config after *config,
628 # thus working with possibly stale values - we don't that either.
630 # So we divide things: This part here is for making *config targets,
631 # and other targets which should work when no .config exists yet.
632 # The main part above takes care of the rest after a .config exists.
634 # Kernel configuration
635 # ---------------------------------------------------------------------------
637 .PHONY
: oldconfig xconfig menuconfig config \
640 scripts
/kconfig
/conf scripts
/kconfig
/mconf scripts
/kconfig
/qconf
: scripts
/fixdep FORCE
641 +@
$(call descend
,scripts
/kconfig
,$@
)
643 xconfig
: scripts
/kconfig
/qconf
644 .
/scripts
/kconfig
/qconf arch
/$(ARCH
)/Kconfig
646 menuconfig
: scripts
/kconfig
/mconf
647 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=scripts lxdialog
648 .
/scripts
/kconfig
/mconf arch
/$(ARCH
)/Kconfig
650 config
: scripts
/kconfig
/conf
651 .
/scripts
/kconfig
/conf arch
/$(ARCH
)/Kconfig
653 oldconfig
: scripts
/kconfig
/conf
654 .
/scripts
/kconfig
/conf
-o arch
/$(ARCH
)/Kconfig
656 randconfig
: scripts
/kconfig
/conf
657 .
/scripts
/kconfig
/conf
-r arch
/$(ARCH
)/Kconfig
659 allyesconfig
: scripts
/kconfig
/conf
660 .
/scripts
/kconfig
/conf
-y arch
/$(ARCH
)/Kconfig
662 allnoconfig
: scripts
/kconfig
/conf
663 .
/scripts
/kconfig
/conf
-n arch
/$(ARCH
)/Kconfig
665 allmodconfig
: scripts
/kconfig
/conf
666 .
/scripts
/kconfig
/conf
-m arch
/$(ARCH
)/Kconfig
668 defconfig
: scripts
/kconfig
/conf
669 .
/scripts
/kconfig
/conf
-d arch
/$(ARCH
)/Kconfig
672 # Cleaning is done on three levels.
673 # make clean Delete all automatically generated files, including
674 # tools and firmware.
675 # make mrproper Delete the current configuration, and related files
676 # Any core files spread around is deleted as well
677 # make distclean Remove editor backup files, patch leftover files and the like
679 # Files removed with 'make clean'
680 CLEAN_FILES
+= vmlinux System.map MC
*
682 # Files removed with 'make mrproper'
684 include/linux
/autoconf.h
include/linux
/version.h \
685 .version .config .config.old config.in config.old \
688 .hdepend
include/linux
/modversions.h \
689 tags TAGS kernel.spec \
692 # Directories removed with 'make mrproper'
696 include/linux
/modules
698 # clean - Delete all intermediate files
700 clean-dirs
+= $(ALL_SUBDIRS
) Documentation
/DocBook scripts
702 $(addprefix _clean_
,$(clean-dirs
)):
703 $(Q
)$(MAKE
) -f scripts
/Makefile.
clean obj
=$(patsubst _clean_
%,%,$@
)
705 quiet_cmd_rmclean
= RM
$$(CLEAN_FILES
)
706 cmd_rmclean
= rm -f
$(CLEAN_FILES
)
707 clean: archclean
$(addprefix _clean_
,$(clean-dirs
))
709 @find .
$(RCS_FIND_IGNORE
) \
710 \
( -name
'*.[oas]' -o
-name
'.*.cmd' -o
-name
'.*.d' \
711 -o
-name
'.*.tmp' \
) -type f
-print | xargs
rm -f
713 # mrproper - delete configuration + modules + core files
715 quiet_cmd_mrproper
= RM
$$(MRPROPER_DIRS
) + $$(MRPROPER_FILES
)
716 cmd_mrproper
= rm -rf
$(MRPROPER_DIRS
) && rm -f
$(MRPROPER_FILES
)
717 mrproper
distclean: clean archmrproper
718 @echo
' Making $@ in the srctree'
719 @find .
$(RCS_FIND_IGNORE
) \
720 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
721 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
722 -o
-name
'.*.rej' -o
-size
0 \
723 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
724 -type f
-print | xargs
rm -f
727 # Generate tags for editors
728 # ---------------------------------------------------------------------------
731 ( find .
$(RCS_FIND_IGNORE
) \
732 \
( -name
include -o
-name arch \
) -prune
-o \
733 -name
'*.[chS]' -print; \
734 find arch
/$(ARCH
) $(RCS_FIND_IGNORE
) \
735 -name
'*.[chS]' -print; \
736 find
include $(RCS_FIND_IGNORE
) \
737 \
( -name config
-o
-name
'asm-*' \
) -prune \
738 -o
-name
'*.[chS]' -print; \
739 find
include/asm-
$(ARCH
) $(RCS_FIND_IGNORE
) \
740 -name
'*.[chS]' -print; \
741 find
include/asm-generic
$(RCS_FIND_IGNORE
) \
742 -name
'*.[chS]' -print )
745 quiet_cmd_TAGS
= MAKE
$@
746 cmd_TAGS
= $(all-sources
) | etags
-
748 # Exuberant ctags works better with -I
750 quiet_cmd_tags
= MAKE
$@
753 CTAGSF
=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \
754 $(all-sources
) | xargs ctags
$$CTAGSF -a
763 # Brief documentation of the typical targets used
764 # ---------------------------------------------------------------------------
767 @echo
'Cleaning targets:'
768 @echo
' clean - remove most generated files but keep the config'
769 @echo
' mrproper - remove all generated files + config + various backup files'
771 @echo
'Configuration targets:'
772 @echo
' oldconfig - Update current config utilising a line-oriented program'
773 @echo
' menuconfig - Update current config utilising a menu based program'
774 @echo
' xconfig - Update current config utilising a X-based program'
775 @echo
' defconfig - New config with default answer to all options'
776 @echo
' allmodconfig - New config selecting modules when possible'
777 @echo
' allyesconfig - New config where all options are accepted with yes'
778 @echo
' allnoconfig - New minimal config'
780 @echo
'Other generic targets:'
781 @echo
' all - Build all targets marked with [*]'
782 @echo
' dep - Create module version information'
783 @echo
'* vmlinux - Build the bare kernel'
784 @echo
'* modules - Build all modules'
785 @echo
' dir/file.[ois]- Build specified target only'
786 @echo
' rpm - Build a kernel as an RPM package'
787 @echo
' tags/TAGS - Generate tags file for editors'
789 @echo
'Documentation targets:'
790 @
$(MAKE
) --no-print-directory
-f Documentation
/DocBook
/Makefile dochelp
792 @echo
'Architecture specific targets ($(ARCH)):'
793 @
$(MAKE
) --no-print-directory
-f arch
/$(ARCH
)/boot
/Makefile archhelp
795 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
796 @echo
'For further info browse Documentation/kbuild/*'
799 # Documentation targets
800 # ---------------------------------------------------------------------------
801 sgmldocs psdocs pdfdocs htmldocs
: scripts
802 $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=Documentation
/DocBook
$@
804 # Scripts to check various things for consistency
805 # ---------------------------------------------------------------------------
808 find
* $(RCS_FIND_IGNORE
) \
809 -name
'*.[hcS]' -type f
-print |
sort \
810 | xargs
$(PERL
) -w scripts
/checkconfig.pl
813 find
* $(RCS_FIND_IGNORE
) \
814 -name
[cC
]onfig.in
-print |
sort \
815 | xargs
$(PERL
) -w scripts
/checkhelp.pl
818 find
* $(RCS_FIND_IGNORE
) \
819 -name
'*.[hcS]' -type f
-print |
sort \
820 | xargs
$(PERL
) -w scripts
/checkincludes.pl
822 else # ifneq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
824 # We're called with both targets which do and do not need
825 # .config included. Handle them one after the other.
826 # ===========================================================================
831 endif # ifeq ($(filter-out $(noconfig_targets),$(MAKECMDGOALS)),)
832 endif # ifdef include_config
834 # FIXME Should go into a make.lib or something
835 # ===========================================================================
837 a_flags
= -Wp
,-MD
,$(depfile
) $(AFLAGS
) $(NOSTDINC_FLAGS
) \
838 $(modkern_aflags
) $(EXTRA_AFLAGS
) $(AFLAGS_
$(*F
).o
)
840 quiet_cmd_as_s_S
= CPP
$@
841 cmd_as_s_S
= $(CPP
) $(a_flags
) -o
$@
$<
843 # read all saved command lines
845 targets
:= $(wildcard $(sort $(targets
)))
846 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
848 ifneq ($(cmd_files
),)
852 # execute the command and also postprocess generated .d dependencies
855 if_changed_dep
= $(if
$(strip $?
$(filter-out FORCE
$(wildcard $^
),$^
)\
856 $(filter-out $(cmd_
$(1)),$(cmd_
$@
))\
857 $(filter-out $(cmd_
$@
),$(cmd_
$(1)))),\
859 $(if
$($(quiet
)cmd_
$(1)),echo
' $($(quiet)cmd_$(1))';) \
861 scripts
/fixdep
$(depfile
) $@
'$(cmd_$(1))' > $(@D
)/.
$(@F
).tmp
; \
863 mv
-f
$(@D
)/.
$(@F
).tmp
$(@D
)/.
$(@F
).cmd
)
865 # Usage: $(call if_changed_rule,foo)
866 # will check if $(cmd_foo) changed, or any of the prequisites changed,
867 # and if so will execute $(rule_foo)
869 if_changed_rule
= $(if
$(strip $? \
870 $(filter-out $(cmd_
$(1)),$(cmd_
$(@F
)))\
871 $(filter-out $(cmd_
$(@F
)),$(cmd_
$(1)))),\
874 # If quiet is set, only print short version of command
876 cmd
= @
$(if
$($(quiet
)cmd_
$(1)),echo
' $($(quiet)cmd_$(1))' &&) $(cmd_
$(1))
878 define update-if-changed
879 if
[ -r
$@
] && cmp
-s
$@
$@.tmp
; then \
880 echo
' (unchanged)'; \
887 # $(call descend,<dir>,<target>)
888 # Recursively call a sub-make in <dir> with target <target>
890 descend
= $(Q
)$(MAKE
) -f scripts
/Makefile.build obj
=$(1) $(2)