5 NAME
=Avast
! A bilge rat
!
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 ("$(origin V)", "command line")
44 # Call a source code checker (by default, "sparse") as part of the
47 # Use 'make C=1' to enable checking of only re-compiled files.
48 # Use 'make C=2' to enable checking of *all* source files, regardless
49 # of whether they are re-compiled or not.
51 # See the file "Documentation/sparse.txt" for more details, including
52 # where to get the "sparse" utility.
55 ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC
= $(C
)
59 ifndef KBUILD_CHECKSRC
63 # Use make M=dir to specify directory of external module to build
64 # Old syntax make ... SUBDIRS=$PWD is still supported
65 # Setting the environment variable KBUILD_EXTMOD take precedence
67 KBUILD_EXTMOD ?
= $(SUBDIRS
)
70 ifeq ("$(origin M)", "command line")
76 # kbuild supports saving output files in a separate directory.
77 # To locate output files in a separate directory two syntaxes are supported.
78 # In both cases the working directory must be the root of the kernel src.
80 # Use "make O=dir/to/store/output/files/"
82 # 2) Set KBUILD_OUTPUT
83 # Set the environment variable KBUILD_OUTPUT to point to the directory
84 # where the output files shall be placed.
85 # export KBUILD_OUTPUT=dir/to/store/output/files/
88 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
92 # KBUILD_SRC is set on invocation of make in OBJ directory
93 # KBUILD_SRC is not intended to be used by the regular user (for now)
96 # OK, Make called in directory where kernel src resides
97 # Do we want to locate output files in a separate directory?
99 ifeq ("$(origin O)", "command line")
100 KBUILD_OUTPUT
:= $(O
)
104 # That's our default target when none is given on the command line
108 ifneq ($(KBUILD_OUTPUT
),)
109 # Invoke a second make in the output directory, passing relevant variables
110 # check that the output directory actually exists
111 saved-output
:= $(KBUILD_OUTPUT
)
112 KBUILD_OUTPUT
:= $(shell cd
$(KBUILD_OUTPUT
) && /bin
/pwd
)
113 $(if
$(KBUILD_OUTPUT
),, \
114 $(error output directory
"$(saved-output)" does not exist
))
116 PHONY
+= $(MAKECMDGOALS
)
118 $(filter-out _all
,$(MAKECMDGOALS
)) _all
:
119 $(if
$(KBUILD_VERBOSE
:1=),@
)$(MAKE
) -C
$(KBUILD_OUTPUT
) \
120 KBUILD_SRC
=$(CURDIR
) \
121 KBUILD_EXTMOD
="$(KBUILD_EXTMOD)" -f
$(CURDIR
)/Makefile
$@
123 # Leave processing to above invocation of make
125 endif # ifneq ($(KBUILD_OUTPUT),)
126 endif # ifeq ($(KBUILD_SRC),)
128 # We process the rest of the Makefile if this is the final invocation of make
129 ifeq ($(skip-makefile
),)
131 # If building an external module we do not care about the all: rule
132 # but instead _all depend on modules
134 ifeq ($(KBUILD_EXTMOD
),)
140 srctree
:= $(if
$(KBUILD_SRC
),$(KBUILD_SRC
),$(CURDIR
))
142 # FIXME - TOPDIR is obsolete, use srctree/objtree
147 VPATH
:= $(srctree
)$(if
$(KBUILD_EXTMOD
),:$(KBUILD_EXTMOD
))
149 export srctree objtree VPATH TOPDIR
152 # SUBARCH tells the usermode build what the underlying arch is. That is set
153 # first, and if a usermode build is happening, the "ARCH=um" on the command
154 # line overrides the setting of ARCH below. If a native build is happening,
155 # then ARCH is assigned, getting whatever value it gets normally, and
156 # SUBARCH is subsequently ignored.
160 # Cross compiling and selecting different set of gcc/bin-utils
161 # ---------------------------------------------------------------------------
163 # When performing cross compilation for other architectures ARCH shall be set
164 # to the target architecture. (See arch/* for the possibilities).
165 # ARCH can be set during invocation of make:
167 # Another way is to have ARCH set in the environment.
168 # The default ARCH is the host where make is executed.
170 # CROSS_COMPILE specify the prefix used for all executables used
171 # during compilation. Only gcc and related bin-utils executables
172 # are prefixed with $(CROSS_COMPILE).
173 # CROSS_COMPILE can be set on the command line
174 # make CROSS_COMPILE=ia64-linux-
175 # Alternatively CROSS_COMPILE can be set in the environment.
176 # Default value for CROSS_COMPILE is not to prefix executables
177 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
182 # Architecture as present in compile.h
183 UTS_MACHINE
:= $(ARCH
)
185 KCONFIG_CONFIG ?
= .config
187 # SHELL used by kbuild
188 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
189 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
190 else echo sh
; fi
; fi
)
194 HOSTCFLAGS
= -Wall
-Wstrict-prototypes
-O2
-fomit-frame-pointer
197 # Decide whether to build built-in, modular, or both.
198 # Normally, just do built-in.
203 # If we have only "make modules", don't compile built-in objects.
204 # When we're building modules with modversions, we need to consider
205 # the built-in objects during the descend as well, in order to
206 # make sure the checksums are up to date before we record them.
208 ifeq ($(MAKECMDGOALS
),modules
)
209 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
212 # If we have "make <whatever> modules", compile modules
213 # in addition to whatever we do anyway.
214 # Just "make" or "make all" shall build modules as well
216 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
220 ifeq ($(MAKECMDGOALS
),)
224 export KBUILD_MODULES KBUILD_BUILTIN
225 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
228 # ---------------------------------------------------------------------------
230 # Normally, we echo the whole command before executing it. By making
231 # that echo $($(quiet)$(cmd)), we now have the possibility to set
232 # $(quiet) to choose other forms of output instead, e.g.
234 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
235 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
237 # If $(quiet) is empty, the whole command will be printed.
238 # If it is set to "quiet_", only the short version will be printed.
239 # If it is set to "silent_", nothing will be printed at all, since
240 # the variable $(silent_cmd_cc_o_c) doesn't exist.
242 # A simple variant is to prefix commands with $(Q) - that's useful
243 # for commands that shall be hidden in non-verbose mode.
247 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
248 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
250 ifeq ($(KBUILD_VERBOSE
),1)
258 # If the user is running make -s (silent mode), suppress echoing of
261 ifneq ($(findstring s
,$(MAKEFLAGS
)),)
265 export quiet Q KBUILD_VERBOSE
268 # Look for make include files relative to root of kernel src
269 MAKEFLAGS
+= --include-dir
=$(srctree
)
271 # We need some generic definitions
272 include $(srctree
)/scripts
/Kbuild.
include
274 # Do not use make's built-in rules and variables
275 # This increases performance and avoid hard-to-debug behavour
278 # Make variables (CC, etc...)
280 AS
= $(CROSS_COMPILE
)as
281 LD
= $(CROSS_COMPILE
)ld
282 CC
= $(CROSS_COMPILE
)gcc
284 AR
= $(CROSS_COMPILE
)ar
285 NM
= $(CROSS_COMPILE
)nm
286 STRIP
= $(CROSS_COMPILE
)strip
287 OBJCOPY
= $(CROSS_COMPILE
)objcopy
288 OBJDUMP
= $(CROSS_COMPILE
)objdump
290 GENKSYMS
= scripts
/genksyms
/genksyms
291 DEPMOD
= /sbin
/depmod
292 KALLSYMS
= scripts
/kallsyms
296 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__
-Wbitwise
$(CF
)
298 CFLAGS_MODULE
= $(MODFLAGS
)
299 AFLAGS_MODULE
= $(MODFLAGS
)
305 # Use LINUXINCLUDE when you must reference the include/ directory.
306 # Needed to be compatible with the O= option
307 LINUXINCLUDE
:= -Iinclude \
308 $(if
$(KBUILD_SRC
),-Iinclude2
-I
$(srctree
)/include) \
309 -include include/linux
/autoconf.h
311 CPPFLAGS
:= -D__KERNEL__
$(LINUXINCLUDE
)
313 CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
314 -fno-strict-aliasing
-fno-common
315 AFLAGS
:= -D__ASSEMBLY__
317 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
318 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
319 KERNELVERSION
= $(VERSION
).
$(PATCHLEVEL
).
$(SUBLEVEL
)$(EXTRAVERSION
)
321 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
322 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
323 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
324 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
326 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
327 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
328 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
330 # When compiling out-of-tree modules, put MODVERDIR in the module
331 # tree rather than in the kernel tree. The kernel tree might
333 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
335 # Files to ignore in find ... statements
337 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
338 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn
--exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
340 # ===========================================================================
341 # Rules shared between *config targets and build targets
343 # Basic helpers built in scripts/
344 PHONY
+= scripts_basic
346 $(Q
)$(MAKE
) $(build
)=scripts
/basic
348 # To avoid any implicit rule to kick in, define an empty command.
349 scripts
/basic
/%: scripts_basic
;
351 PHONY
+= outputmakefile
352 # outputmakefile generates a Makefile in the output directory, if using a
353 # separate output directory. This allows convenient use of make in the
356 ifneq ($(KBUILD_SRC
),)
357 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
358 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
361 # To make sure we do not include .config for any of the *config targets
362 # catch them early, and hand them over to scripts/kconfig/Makefile
363 # It is allowed to specify more targets when calling make, including
364 # mixing *config targets and build targets.
365 # For example 'make oldconfig all'.
366 # Detect when mixed targets is specified, and make a second invocation
367 # of make so .config is not included in this case either (for *config).
369 no-dot-config-targets
:= clean mrproper
distclean \
370 cscope TAGS
tags help
%docs
check% \
371 include/linux
/version.h headers_
% \
372 kernelrelease kernelversion
378 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
379 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
384 ifeq ($(KBUILD_EXTMOD
),)
385 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
387 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
393 ifeq ($(mixed-targets
),1)
394 # ===========================================================================
395 # We're called with mixed targets (*config and build targets).
396 # Handle them one by one.
399 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
402 ifeq ($(config-targets
),1)
403 # ===========================================================================
404 # *config targets only - make sure prerequisites are updated, and descend
405 # in scripts/kconfig to make the *config target
407 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
408 # KBUILD_DEFCONFIG may point out an alternative default configuration
409 # used for 'make defconfig'
410 include $(srctree
)/arch
/$(ARCH
)/Makefile
411 export KBUILD_DEFCONFIG
413 config
%config
: scripts_basic outputmakefile FORCE
414 $(Q
)mkdir
-p
include/linux
include/config
415 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
418 # ===========================================================================
419 # Build targets only - this includes vmlinux, arch specific targets, clean
420 # targets and others. In general all targets except *config targets.
422 ifeq ($(KBUILD_EXTMOD
),)
423 # Additional helpers built in scripts/
424 # Carefully list dependencies so we do not try to build scripts twice
427 scripts
: scripts_basic
include/config
/auto.conf
428 $(Q
)$(MAKE
) $(build
)=$(@
)
430 # Objects we will link into vmlinux / subdirs we need to visit
432 drivers-y
:= drivers
/ sound
/
436 endif # KBUILD_EXTMOD
438 ifeq ($(dot-config
),1)
440 -include include/config
/auto.conf
442 ifeq ($(KBUILD_EXTMOD
),)
443 # Read in dependencies to all Kconfig* files, make sure to run
444 # oldconfig if changes are detected.
445 -include include/config
/auto.conf.cmd
447 # To avoid any implicit rule to kick in, define an empty command
448 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
450 # If .config is newer than include/config/auto.conf, someone tinkered
451 # with it and forgot to run make oldconfig.
452 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
453 # we execute the config step to be sure to catch updated Kconfig files
454 include/config
/auto.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
455 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
457 # external modules needs include/linux/autoconf.h and include/config/auto.conf
458 # but do not care if they are up-to-date. Use auto.conf to trigger the test
459 PHONY
+= include/config
/auto.conf
461 include/config
/auto.conf
:
462 $(Q
)test -e
include/linux
/autoconf.h
-a
-e
$@ ||
( \
464 echo
" ERROR: Kernel configuration is invalid."; \
465 echo
" include/linux/autoconf.h or $@ are missing."; \
466 echo
" Run 'make oldconfig && make prepare' on kernel src to fix it."; \
470 endif # KBUILD_EXTMOD
473 # Dummy target needed, because used as prerequisite
474 include/config
/auto.conf
: ;
475 endif # $(dot-config)
477 # The all: target is the default when no target is given on the
479 # This allow a user to issue only 'make' to build a kernel including modules
480 # Defaults vmlinux but it is usually overridden in the arch makefile
483 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
489 include $(srctree
)/arch
/$(ARCH
)/Makefile
491 ifdef CONFIG_FRAME_POINTER
492 CFLAGS
+= -fno-omit-frame-pointer
$(call cc-option
,-fno-optimize-sibling-calls
,)
494 CFLAGS
+= -fomit-frame-pointer
497 ifdef CONFIG_UNWIND_INFO
498 CFLAGS
+= -fasynchronous-unwind-tables
499 LDFLAGS_vmlinux
+= --eh-frame-hdr
502 ifdef CONFIG_DEBUG_INFO
506 # Force gcc to behave correct even for buggy distributions
507 CFLAGS
+= $(call cc-option
, -fno-stack-protector
)
509 # arch Makefile may override CC so keep this after arch Makefile is included
510 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
511 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
513 # warn about C99 declaration after statement
514 CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
516 # disable pointer signed / unsigned warnings in gcc 4.0
517 CFLAGS
+= $(call cc-option
,-Wno-pointer-sign
,)
519 # Default kernel image to build when no specific target is given.
520 # KBUILD_IMAGE may be overruled on the command line or
521 # set in the environment
522 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
524 export KBUILD_IMAGE ?
= vmlinux
527 # INSTALL_PATH specifies where to place the updated kernel and system map
528 # images. Default is /boot, but you can set it to other values
529 export INSTALL_PATH ?
= /boot
532 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
533 # relocations required by build roots. This is not defined in the
534 # makefile but the argument can be passed to make if needed.
537 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
541 # INSTALL_MOD_STRIP, if defined, will cause modules to be
542 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
543 # the default option --strip-debug will be used. Otherwise,
544 # INSTALL_MOD_STRIP will used as the options to the strip command.
546 ifdef INSTALL_MOD_STRIP
547 ifeq ($(INSTALL_MOD_STRIP
),1)
548 mod_strip_cmd
= $(STRIP
) --strip-debug
550 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
551 endif # INSTALL_MOD_STRIP=1
554 endif # INSTALL_MOD_STRIP
558 ifeq ($(KBUILD_EXTMOD
),)
559 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
561 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
562 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
563 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
565 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
567 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
568 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
570 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
571 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
572 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
573 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
574 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
575 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
576 libs-y
:= $(libs-y1
) $(libs-y2
)
579 # ---------------------------------------------------------------------------
580 # vmlinux is built from the objects selected by $(vmlinux-init) and
581 # $(vmlinux-main). Most are built-in.o files from top-level directories
582 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
583 # Ordering when linking is important, and $(vmlinux-init) must be first.
588 # +-< $(vmlinux-init)
589 # | +--< init/version.o + more
591 # +--< $(vmlinux-main)
592 # | +--< driver/built-in.o mm/built-in.o + more
594 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
596 # vmlinux version (uname -v) cannot be updated during normal
597 # descending-into-subdirs phase since we do not yet know if we need to
599 # Therefore this step is delayed until just before final link of vmlinux -
600 # except in the kallsyms case where it is done just before adding the
601 # symbols to the kernel.
603 # System.map is generated to document addresses of all kernel symbols
605 vmlinux-init
:= $(head-y
) $(init-y
)
606 vmlinux-main
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
607 vmlinux-all
:= $(vmlinux-init
) $(vmlinux-main
)
608 vmlinux-lds
:= arch
/$(ARCH
)/kernel
/vmlinux.lds
610 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
611 # May be overridden by arch/$(ARCH)/Makefile
612 quiet_cmd_vmlinux__ ?
= LD
$@
613 cmd_vmlinux__ ?
= $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
) -o
$@ \
614 -T
$(vmlinux-lds
) $(vmlinux-init
) \
615 --start-group
$(vmlinux-main
) --end-group \
616 $(filter-out $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) FORCE
,$^
)
618 # Generate new vmlinux version
619 quiet_cmd_vmlinux_version
= GEN .version
620 cmd_vmlinux_version
= set
-e
; \
621 if
[ ! -r .version
]; then \
625 mv .version .old_version
; \
626 expr
0$$(cat .old_version
) + 1 >.version
; \
628 $(MAKE
) $(build
)=init
630 # Generate System.map
631 quiet_cmd_sysmap
= SYSMAP
632 cmd_sysmap
= $(CONFIG_SHELL
) $(srctree
)/scripts
/mksysmap
635 # If CONFIG_KALLSYMS is set .version is already updated
636 # Generate System.map and verify that the content is consistent
637 # Use + in front of the vmlinux_version rule to silent warning with make -j2
638 # First command is ':' to allow us to use + in front of the rule
639 define rule_vmlinux__
641 $(if
$(CONFIG_KALLSYMS
),,+$(call cmd
,vmlinux_version
))
643 $(call cmd
,vmlinux__
)
644 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
646 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
647 echo
' $($(quiet)cmd_sysmap) System.map' &&) \
648 $(cmd_sysmap
) $@ System.map
; \
649 if
[ $$?
-ne
0 ]; then \
657 ifdef CONFIG_KALLSYMS
658 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
659 # It's a three stage process:
660 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
662 # Running kallsyms on that gives us .tmp_kallsyms1.o with
663 # the right size - vmlinux version (uname -v) is updated during this step
664 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
665 # but due to the added section, some addresses have shifted.
666 # From here, we generate a correct .tmp_kallsyms2.o
667 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
668 # o Verify that the System.map from vmlinux matches the map from
669 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
670 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
671 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
672 # temporary bypass to allow the kernel to be built while the
673 # maintainers work out what went wrong with kallsyms.
675 ifdef CONFIG_KALLSYMS_EXTRA_PASS
681 kallsyms.o
:= .tmp_kallsyms
$(last_kallsyms
).o
683 define verify_kallsyms
684 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
685 echo
' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
686 $(cmd_sysmap
) .tmp_vmlinux
$(last_kallsyms
) .tmp_System.map
687 $(Q
)cmp
-s System.map .tmp_System.map || \
688 (echo Inconsistent kallsyms data
; \
689 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS
; \
690 rm .tmp_kallsyms
* ; /bin
/false
)
693 # Update vmlinux version before link
694 # Use + in front of this rule to silent warning about make -j1
695 # First command is ':' to allow us to use + in front of this rule
696 cmd_ksym_ld
= $(cmd_vmlinux__
)
699 +$(call cmd
,vmlinux_version
)
700 $(call cmd
,vmlinux__
)
701 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
704 # Generate .S file with all kernel symbols
705 quiet_cmd_kallsyms
= KSYM
$@
706 cmd_kallsyms
= $(NM
) -n
$< |
$(KALLSYMS
) \
707 $(if
$(CONFIG_KALLSYMS_ALL
),--all-symbols
) > $@
709 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o
: %.o
: %.S scripts FORCE
710 $(call if_changed_dep
,as_o_S
)
712 .tmp_kallsyms
%.S
: .tmp_vmlinux
% $(KALLSYMS
)
715 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
716 .tmp_vmlinux1
: $(vmlinux-lds
) $(vmlinux-all
) FORCE
717 $(call if_changed_rule
,ksym_ld
)
719 .tmp_vmlinux2
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms1.o FORCE
720 $(call if_changed
,vmlinux__
)
722 .tmp_vmlinux3
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms2.o FORCE
723 $(call if_changed
,vmlinux__
)
725 # Needs to visit scripts/ before $(KALLSYMS) can be used.
726 $(KALLSYMS
): scripts
;
728 # Generate some data for debugging strange kallsyms problems
729 debug_kallsyms
: .tmp_map
$(last_kallsyms
)
731 .tmp_map
%: .tmp_vmlinux
% FORCE
732 ($(OBJDUMP
) -h
$< |
$(AWK
) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM
) $<) |
sort > $@
738 endif # ifdef CONFIG_KALLSYMS
740 # vmlinux image - including updated kernel symbols
741 vmlinux
: $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) $(kallsyms.o
) FORCE
742 ifdef CONFIG_HEADERS_CHECK
743 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
745 $(call if_changed_rule
,vmlinux__
)
746 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
$@
747 $(Q
)rm -f .old_version
749 # The actual objects are generated when descending,
750 # make sure no implicit rule kicks in
751 $(sort $(vmlinux-init
) $(vmlinux-main
)) $(vmlinux-lds
): $(vmlinux-dirs
) ;
753 # Handle descending into subdirectories listed in $(vmlinux-dirs)
754 # Preset locale variables to speed up the build process. Limit locale
755 # tweaks to this spot to avoid wrong language settings when running
756 # make menuconfig etc.
757 # Error messages still appears in the original language
759 PHONY
+= $(vmlinux-dirs
)
760 $(vmlinux-dirs
): prepare scripts
761 $(Q
)$(MAKE
) $(build
)=$@
763 # Build the kernel release string
765 # The KERNELRELEASE value built here is stored in the file
766 # include/config/kernel.release, and is used when executing several
767 # make targets, such as "make install" or "make modules_install."
769 # The eventual kernel release string consists of the following fields,
770 # shown in a hierarchical format to show how smaller parts are concatenated
771 # to form the larger and final value, with values coming from places like
772 # the Makefile, kernel config options, make command line options and/or
773 # SCM tag information.
777 # $(PATCHLEVEL) eg, 6
779 # $(EXTRAVERSION) eg, -rc6
782 # localversion* (all localversion* files)
783 # $(CONFIG_LOCALVERSION) (from kernel config setting)
784 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
785 # ./scripts/setlocalversion (SCM tag, if one exists)
786 # $(LOCALVERSION) (from make command line if provided)
788 # Note how the final $(localver-auto) string is included *only* if the
789 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
790 # moment, only git is supported but other SCMs can edit the script
791 # scripts/setlocalversion and add the appropriate checks as needed.
794 space
:= $(nullstring
) # end of line
796 ___localver
= $(objtree
)/localversion
* $(srctree
)/localversion
*
797 __localver
= $(sort $(wildcard $(___localver
)))
798 # skip backup files (containing '~')
799 _localver
= $(foreach f
, $(__localver
), $(if
$(findstring ~
, $(f
)),,$(f
)))
801 localver
= $(subst $(space
),, \
802 $(shell cat
/dev
/null
$(_localver
)) \
803 $(patsubst "%",%,$(CONFIG_LOCALVERSION
)))
805 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
806 # and if the SCM is know a tag from the SCM is appended.
807 # The appended tag is determined by the SCM used.
809 # Currently, only git is supported.
810 # Other SCMs can edit scripts/setlocalversion and add the appropriate
812 ifdef CONFIG_LOCALVERSION_AUTO
813 _localver-auto
= $(shell $(CONFIG_SHELL
) \
814 $(srctree
)/scripts
/setlocalversion
$(srctree
))
815 localver-auto
= $(LOCALVERSION
)$(_localver-auto
)
818 localver-full
= $(localver
)$(localver-auto
)
820 # Store (new) KERNELRELASE string in include/config/kernel.release
821 kernelrelease
= $(KERNELVERSION
)$(localver-full
)
822 include/config
/kernel.release
: include/config
/auto.conf FORCE
824 $(Q
)echo
$(kernelrelease
) > $@
827 # Things we need to do before we recursively start building the kernel
828 # or the modules are listed in "prepare".
829 # A multi level approach is used. prepareN is processed before prepareN-1.
830 # archprepare is used in arch Makefiles and when processed asm symlink,
831 # version.h and scripts_basic is processed / created.
833 # Listed in dependency order
834 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
836 # prepare-all is deprecated, use prepare as valid replacement
839 # prepare3 is used to check if we are building in a separate output directory,
841 # 1) Check that make has not been executed in the kernel src $(srctree)
842 # 2) Create the include2 directory, used for the second asm symlink
843 prepare3
: include/config
/kernel.release
844 ifneq ($(KBUILD_SRC
),)
845 @echo
' Using $(srctree) as source for kernel'
846 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
847 echo
" $(srctree) is not clean, please run 'make mrproper'";\
848 echo
" in the '$(srctree)' directory.";\
851 $(Q
)if
[ ! -d include2
]; then mkdir
-p include2
; fi
;
852 $(Q
)ln
-fsn
$(srctree
)/include/asm-
$(ARCH
) include2
/asm
855 # prepare2 creates a makefile if using a separate output directory
856 prepare2
: prepare3 outputmakefile
858 prepare1
: prepare2
include/linux
/version.h
include/linux
/utsrelease.h \
859 include/asm
include/config
/auto.conf
860 ifneq ($(KBUILD_MODULES
),)
861 $(Q
)mkdir
-p
$(MODVERDIR
)
862 $(Q
)rm -f
$(MODVERDIR
)/*
865 archprepare
: prepare1 scripts_basic
867 prepare0
: archprepare FORCE
868 $(Q
)$(MAKE
) $(build
)=.
870 # All the preparing..
871 prepare prepare-all
: prepare0
873 # Leave this as default for preprocessing vmlinux.lds.S, which is now
874 # done in arch/$(ARCH)/kernel/Makefile
876 export CPPFLAGS_vmlinux.lds
+= -P
-C
-U
$(ARCH
)
878 # FIXME: The asm symlink changes when $(ARCH) changes. That's
879 # hard to detect, but I suppose "make mrproper" is a good idea
880 # before switching between archs anyway.
883 @echo
' SYMLINK $@ -> include/asm-$(ARCH)'
884 $(Q
)if
[ ! -d
include ]; then mkdir
-p
include; fi
;
885 @ln
-fsn asm-
$(ARCH
) $@
887 # Generate some files
888 # ---------------------------------------------------------------------------
890 # KERNELRELEASE can change from a few different places, meaning version.h
891 # needs to be updated, so this check is forced on all builds
894 define filechk_utsrelease.h
895 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
896 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
899 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
902 define filechk_version.h
903 (echo \
#define LINUX_VERSION_CODE $(shell \
904 expr
$(VERSION
) \
* 65536 + $(PATCHLEVEL
) \
* 256 + $(SUBLEVEL
)); \
905 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
908 include/linux
/version.h
: $(srctree
)/Makefile FORCE
909 $(call filechk
,version.h
)
911 include/linux
/utsrelease.h
: include/config
/kernel.release FORCE
912 $(call filechk
,utsrelease.h
)
914 # ---------------------------------------------------------------------------
918 @echo
'*** Warning: make $@ is unnecessary now.'
920 # ---------------------------------------------------------------------------
922 INSTALL_HDR_PATH
=$(objtree
)/usr
923 export INSTALL_HDR_PATH
925 HDRARCHES
=$(filter-out generic
,$(patsubst $(srctree
)/include/asm-
%/Kbuild
,%,$(wildcard $(srctree
)/include/asm-
*/Kbuild
)))
927 PHONY
+= headers_install_all
928 headers_install_all
: include/linux
/version.h scripts_basic FORCE
929 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
930 $(Q
)for arch in
$(HDRARCHES
); do \
931 $(MAKE
) ARCH
=$$arch -f
$(srctree
)/scripts
/Makefile.headersinst obj
=include BIASMDIR
=-bi-
$$arch ;\
934 PHONY
+= headers_install
935 headers_install
: include/linux
/version.h scripts_basic FORCE
936 @if
[ ! -r
$(srctree
)/include/asm-
$(ARCH
)/Kbuild
]; then \
937 echo
'*** Error: Headers not exportable for this architecture ($(ARCH))'; \
939 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
940 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.headersinst obj
=include
942 PHONY
+= headers_check
943 headers_check
: headers_install
944 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.headersinst obj
=include HDRCHECK
=1
946 # ---------------------------------------------------------------------------
951 # By default, build modules as well
958 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
)
959 @echo
' Building modules, stage 2.';
960 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
963 # Target to prepare building external modules
964 PHONY
+= modules_prepare
965 modules_prepare
: prepare scripts
967 # Target to install modules
968 PHONY
+= modules_install
969 modules_install
: _modinst_ _modinst_post
973 @if
[ -z
"`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
974 echo
"Warning: you may need to install module-init-tools"; \
975 echo
"See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
978 @
rm -rf
$(MODLIB
)/kernel
979 @
rm -f
$(MODLIB
)/source
980 @mkdir
-p
$(MODLIB
)/kernel
981 @ln
-s
$(srctree
) $(MODLIB
)/source
982 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
983 rm -f
$(MODLIB
)/build
; \
984 ln
-s
$(objtree
) $(MODLIB
)/build
; \
986 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
988 # If System.map exists, run depmod. This deliberately does not have a
989 # dependency on System.map since that would run the dependency tree on
990 # vmlinux. This depmod is only for convenience to give the initial
991 # boot a modules.dep even before / is mounted read-write. However the
992 # boot script depmod is the master version.
993 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
996 depmod_opts
:= -b
$(INSTALL_MOD_PATH
) -r
998 PHONY
+= _modinst_post
999 _modinst_post
: _modinst_
1000 if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then
$(DEPMOD
) -ae
-F System.map
$(depmod_opts
) $(KERNELRELEASE
); fi
1002 else # CONFIG_MODULES
1004 # Modules not configured
1005 # ---------------------------------------------------------------------------
1007 modules modules_install
: FORCE
1009 @echo
"The present kernel configuration has modules disabled."
1010 @echo
"Type 'make config' and enable loadable module support."
1011 @echo
"Then build a kernel with module support enabled."
1015 endif # CONFIG_MODULES
1018 # Cleaning is done on three levels.
1019 # make clean Delete most generated files
1020 # Leave enough to build external modules
1021 # make mrproper Delete the current configuration, and all generated files
1022 # make distclean Remove editor backup files, patch leftover files and the like
1024 # Directories & files removed with 'make clean'
1025 CLEAN_DIRS
+= $(MODVERDIR
)
1026 CLEAN_FILES
+= vmlinux System.map \
1027 .tmp_kallsyms
* .tmp_version .tmp_vmlinux
* .tmp_System.map
1029 # Directories & files removed with 'make mrproper'
1030 MRPROPER_DIRS
+= include/config include2 usr
/include
1031 MRPROPER_FILES
+= .config .config.old
include/asm .version .old_version \
1032 include/linux
/autoconf.h
include/linux
/version.h \
1033 include/linux
/utsrelease.h \
1034 Module.symvers
tags TAGS cscope
*
1036 # clean - Delete most, but leave enough to build external modules
1038 clean: rm-dirs
:= $(CLEAN_DIRS
)
1039 clean: rm-files
:= $(CLEAN_FILES
)
1040 clean-dirs
:= $(addprefix _clean_
,$(srctree
) $(vmlinux-alldirs
))
1042 PHONY
+= $(clean-dirs
) clean archclean
1044 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1046 clean: archclean
$(clean-dirs
)
1049 @find .
$(RCS_FIND_IGNORE
) \
1050 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1051 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1052 -o
-name
'*.symtypes' \
) \
1053 -type f
-print | xargs
rm -f
1055 # mrproper - Delete all generated files, including .config
1057 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1058 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1059 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
1061 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1063 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1065 mrproper
: clean archmrproper
$(mrproper-dirs
)
1074 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1075 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1076 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1077 -o
-name
'.*.rej' -o
-size
0 \
1078 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
1079 -type f
-print | xargs
rm -f
1082 # Packaging of the kernel to various formats
1083 # ---------------------------------------------------------------------------
1084 # rpm target kept for backward compatibility
1085 package-dir
:= $(srctree
)/scripts
/package
1087 %pkg
: include/config
/kernel.release FORCE
1088 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1089 rpm
: include/config
/kernel.release FORCE
1090 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1093 # Brief documentation of the typical targets used
1094 # ---------------------------------------------------------------------------
1096 boards
:= $(wildcard $(srctree
)/arch
/$(ARCH
)/configs
/*_defconfig
)
1097 boards
:= $(notdir $(boards
))
1100 @echo
'Cleaning targets:'
1101 @echo
' clean - remove most generated files but keep the config and'
1102 @echo
' enough build support to build external modules'
1103 @echo
' mrproper - remove all generated files + config + various backup files'
1104 @echo
' distclean - mrproper + remove editor backup and patch files'
1106 @echo
'Configuration targets:'
1107 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1109 @echo
'Other generic targets:'
1110 @echo
' all - Build all targets marked with [*]'
1111 @echo
'* vmlinux - Build the bare kernel'
1112 @echo
'* modules - Build all modules'
1113 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1114 @echo
' dir/ - Build all files in dir and below'
1115 @echo
' dir/file.[ois] - Build specified target only'
1116 @echo
' dir/file.ko - Build module including final link'
1117 @echo
' rpm - Build a kernel as an RPM package'
1118 @echo
' tags/TAGS - Generate tags file for editors'
1119 @echo
' cscope - Generate cscope index'
1120 @echo
' kernelrelease - Output the release version string'
1121 @echo
' kernelversion - Output the version stored in Makefile'
1122 @if
[ -r
include/asm-
$(ARCH
)/Kbuild
]; then \
1123 echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1125 @echo
' (default: $(INSTALL_HDR_PATH))'
1127 @echo
'Static analysers'
1128 @echo
' checkstack - Generate a list of stack hogs'
1129 @echo
' namespacecheck - Name space analysis on compiled kernel'
1130 @if
[ -r
include/asm-
$(ARCH
)/Kbuild
]; then \
1131 echo
' headers_check - Sanity check on exported headers'; \
1134 @echo
'Kernel packaging:'
1135 @
$(MAKE
) $(build
)=$(package-dir
) help
1137 @echo
'Documentation targets:'
1138 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1140 @echo
'Architecture specific targets ($(ARCH)):'
1141 @
$(if
$(archhelp
),$(archhelp
),\
1142 echo
' No architecture specific help defined for $(ARCH)')
1145 $(foreach b
, $(boards
), \
1146 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1149 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1150 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1151 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1152 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1153 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1155 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1156 @echo
'For further info see the ./README file'
1159 # Documentation targets
1160 # ---------------------------------------------------------------------------
1161 %docs
: scripts_basic FORCE
1162 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1164 else # KBUILD_EXTMOD
1167 # External module support.
1168 # When building external modules the kernel used as basis is considered
1169 # read-only, and no consistency checks are made and the make
1170 # system is not used on the basis kernel. If updates are required
1171 # in the basis kernel ordinary make commands (without M=...) must
1174 # The following are the only valid targets when building external
1176 # make M=dir clean Delete all automatically generated files
1177 # make M=dir modules Make all modules in specified dir
1178 # make M=dir Same as 'make M=dir modules'
1179 # make M=dir modules_install
1180 # Install the modules built in the module directory
1181 # Assumes install directory is already created
1183 # We are always building modules
1185 PHONY
+= crmodverdir
1187 $(Q
)mkdir
-p
$(MODVERDIR
)
1188 $(Q
)rm -f
$(MODVERDIR
)/*
1190 PHONY
+= $(objtree
)/Module.symvers
1191 $(objtree
)/Module.symvers
:
1192 @
test -e
$(objtree
)/Module.symvers ||
( \
1194 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1195 echo
" is missing; modules will have no dependencies and modversions."; \
1198 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1199 PHONY
+= $(module-dirs
) modules
1200 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1201 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1203 modules
: $(module-dirs
)
1204 @echo
' Building modules, stage 2.';
1205 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1207 PHONY
+= modules_install
1208 modules_install
: _emodinst_ _emodinst_post
1210 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1213 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1214 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1216 # Run depmod only is we have System.map and depmod is executable
1217 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1218 cmd_depmod
= if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then \
1219 $(DEPMOD
) -ae
-F System.map \
1220 $(if
$(strip $(INSTALL_MOD_PATH
)), \
1221 -b
$(INSTALL_MOD_PATH
) -r
) \
1225 PHONY
+= _emodinst_post
1226 _emodinst_post
: _emodinst_
1229 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1231 PHONY
+= $(clean-dirs
) clean
1233 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1235 clean: rm-dirs
:= $(MODVERDIR
)
1236 clean: $(clean-dirs
)
1238 @find
$(KBUILD_EXTMOD
) $(RCS_FIND_IGNORE
) \
1239 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1240 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
) \
1241 -type f
-print | xargs
rm -f
1244 @echo
' Building external modules.'
1245 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1247 @echo
' modules - default target, build the module(s)'
1248 @echo
' modules_install - install the module'
1249 @echo
' clean - remove generated files in module directory only'
1253 PHONY
+= prepare scripts
1256 endif # KBUILD_EXTMOD
1258 # Generate tags for editors
1259 # ---------------------------------------------------------------------------
1261 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1262 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1263 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1265 ifeq ($(src
),$(obj
))
1268 __srctree
= $(srctree
)/
1271 ifeq ($(ALLSOURCE_ARCHS
),)
1273 ALLINCLUDE_ARCHS
:= $(ARCH
) $(SUBARCH
)
1275 ALLINCLUDE_ARCHS
:= $(ARCH
)
1278 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1279 ALLINCLUDE_ARCHS
:= $(ALLSOURCE_ARCHS
)
1282 ALLSOURCE_ARCHS
:= $(ARCH
)
1285 ( find
$(__srctree
) $(RCS_FIND_IGNORE
) \
1286 \
( -name
include -o
-name arch \
) -prune
-o \
1288 for ARCH in
$(ALLSOURCE_ARCHS
) ; do \
1289 find
$(__srctree
)arch
/$${ARCH} $(RCS_FIND_IGNORE
) \
1292 find
$(__srctree
)security
/selinux
/include $(RCS_FIND_IGNORE
) \
1294 find
$(__srctree
)include $(RCS_FIND_IGNORE
) \
1295 \
( -name config
-o
-name
'asm-*' \
) -prune \
1296 -o
-name
$1 -print; \
1297 for ARCH in
$(ALLINCLUDE_ARCHS
) ; do \
1298 find
$(__srctree
)include/asm-
$${ARCH} $(RCS_FIND_IGNORE
) \
1301 find
$(__srctree
)include/asm-generic
$(RCS_FIND_IGNORE
) \
1306 $(call find-sources
,'*.[chS]')
1309 $(call find-sources
,'Kconfig*')
1311 define all-defconfigs
1312 $(call find-sources
,'defconfig')
1316 if
$1 --version
2>&1 | grep
-iq exuberant
; then \
1317 $(all-sources
) | xargs
$1 -a \
1318 -I __initdata
,__exitdata
,__acquires
,__releases \
1319 -I EXPORT_SYMBOL
,EXPORT_SYMBOL_GPL \
1320 --extra
=+f
--c-kinds
=+px \
1321 --regex-asm
='/ENTRY\(([^)]*)\).*/\1/'; \
1322 $(all-kconfigs
) | xargs
$1 -a \
1324 --language-force
=kconfig \
1325 --regex-kconfig
='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1326 $(all-defconfigs
) | xargs
-r
$1 -a \
1327 --langdef
=dotconfig \
1328 --language-force
=dotconfig \
1329 --regex-dotconfig
='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1330 elif
$1 --version
2>&1 | grep
-iq emacs
; then \
1331 $(all-sources
) | xargs
$1 -a
; \
1332 $(all-kconfigs
) | xargs
$1 -a \
1333 --regex
='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1334 $(all-defconfigs
) | xargs
-r
$1 -a \
1335 --regex
='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1337 $(all-sources
) | xargs
$1 -a
; \
1341 quiet_cmd_cscope-file
= FILELST cscope.files
1342 cmd_cscope-file
= (echo \
-k
; echo \
-q
; $(all-sources
)) > cscope.files
1344 quiet_cmd_cscope
= MAKE cscope.out
1345 cmd_cscope
= cscope
-b
1348 $(call cmd
,cscope-file
)
1351 quiet_cmd_TAGS
= MAKE
$@
1360 quiet_cmd_tags
= MAKE
$@
1370 # Scripts to check various things for consistency
1371 # ---------------------------------------------------------------------------
1374 find
* $(RCS_FIND_IGNORE
) \
1375 -name
'*.[hcS]' -type f
-print |
sort \
1376 | xargs
$(PERL
) -w scripts
/checkincludes.pl
1379 find
* $(RCS_FIND_IGNORE
) \
1380 -name
'*.[hcS]' -type f
-print |
sort \
1381 | xargs
$(PERL
) -w scripts
/checkversion.pl
1384 $(PERL
) $(srctree
)/scripts
/namespace.pl
1386 endif #ifeq ($(config-targets),1)
1387 endif #ifeq ($(mixed-targets),1)
1389 PHONY
+= checkstack kernelrelease kernelversion
1391 # Use $(SUBARCH) here instead of $(ARCH) so that this works for UML.
1392 # In the UML case, $(SUBARCH) is the name of the underlying
1393 # architecture, while for all other arches, it is the same as $(ARCH).
1395 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1396 $(PERL
) $(src
)/scripts
/checkstack.pl
$(SUBARCH
)
1399 $(if
$(wildcard include/config
/kernel.release
), $(Q
)echo
$(KERNELRELEASE
), \
1400 $(error kernelrelease not valid
- run
'make prepare' to update it
))
1402 @echo
$(KERNELVERSION
)
1405 # ---------------------------------------------------------------------------
1406 # Single targets are compatible with:
1407 # - build whith mixed source and output
1408 # - build with separate output dir 'make O=...'
1409 # - external modules
1411 # target-dir => where to store outputfile
1412 # build-dir => directory in kernel source tree to use
1414 ifeq ($(KBUILD_EXTMOD
),)
1415 build-dir
= $(patsubst %/,%,$(dir $@
))
1416 target-dir
= $(dir $@
)
1418 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1419 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1420 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1423 %.s
: %.c prepare scripts FORCE
1424 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1425 %.i
: %.c prepare scripts FORCE
1426 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1427 %.o
: %.c prepare scripts FORCE
1428 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1429 %.lst
: %.c prepare scripts FORCE
1430 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1431 %.s
: %.S prepare scripts FORCE
1432 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1433 %.o
: %.S prepare scripts FORCE
1434 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1435 %.symtypes
: %.c prepare scripts FORCE
1436 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1439 / %/: prepare scripts FORCE
1440 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1441 $(build
)=$(build-dir
)
1442 %.ko
: prepare scripts FORCE
1443 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1444 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1445 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1447 # FIXME Should go into a make.lib or something
1448 # ===========================================================================
1450 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1451 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1453 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1454 cmd_rmfiles
= rm -f
$(rm-files
)
1457 a_flags
= -Wp
,-MD
,$(depfile
) $(AFLAGS
) $(AFLAGS_KERNEL
) \
1458 $(NOSTDINC_FLAGS
) $(CPPFLAGS
) \
1459 $(modkern_aflags
) $(EXTRA_AFLAGS
) $(AFLAGS_
$(basetarget
).o
)
1461 quiet_cmd_as_o_S
= AS
$@
1462 cmd_as_o_S
= $(CC
) $(a_flags
) -c
-o
$@
$<
1464 # read all saved command lines
1466 targets
:= $(wildcard $(sort $(targets
)))
1467 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1469 ifneq ($(cmd_files
),)
1470 $(cmd_files
): ; # Do not try to update included dependency files
1471 include $(cmd_files
)
1474 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1476 # $(Q)$(MAKE) $(clean)=dir
1477 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1479 endif # skip-makefile
1485 # Declare the contents of the .PHONY variable as phony. We keep that
1486 # information in a variable se we can use it in if_changed and friends.