5 NAME
= Arr Matey
! A Hairy 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.
14 # o use make's built-in rules and variables
15 # (this increases performance and avoid hard-to-debug behavour);
16 # o print "Entering directory ...";
17 MAKEFLAGS
+= -rR
--no-print-directory
19 # We are using a recursive build, so we need to do a little thinking
20 # to get the ordering right.
22 # Most importantly: sub-Makefiles should only ever modify files in
23 # their own directory. If in some directory we have a dependency on
24 # a file in another dir (which doesn't happen often, but it's often
25 # unavoidable when linking the built-in.o targets which finally
26 # turn into vmlinux), we will call a sub make in that other dir, and
27 # after that we are sure that everything which is in that other dir
30 # The only cases where we need to modify files which have global
31 # effects are thus separated out and done before the recursive
32 # descending is started. They are now explicitly listed as the
35 # To put more focus on warnings, be less verbose as default
36 # Use 'make V=1' to see the full commands
39 ifeq ("$(origin V)", "command line")
47 # Call a source code checker (by default, "sparse") as part of the
50 # Use 'make C=1' to enable checking of only re-compiled files.
51 # Use 'make C=2' to enable checking of *all* source files, regardless
52 # of whether they are re-compiled or not.
54 # See the file "Documentation/sparse.txt" for more details, including
55 # where to get the "sparse" utility.
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC
= $(C
)
62 ifndef KBUILD_CHECKSRC
66 # Use make M=dir to specify directory of external module to build
67 # Old syntax make ... SUBDIRS=$PWD is still supported
68 # Setting the environment variable KBUILD_EXTMOD take precedence
70 KBUILD_EXTMOD ?
= $(SUBDIRS
)
73 ifeq ("$(origin M)", "command line")
79 # kbuild supports saving output files in a separate directory.
80 # To locate output files in a separate directory two syntaxes are supported.
81 # In both cases the working directory must be the root of the kernel src.
83 # Use "make O=dir/to/store/output/files/"
85 # 2) Set KBUILD_OUTPUT
86 # Set the environment variable KBUILD_OUTPUT to point to the directory
87 # where the output files shall be placed.
88 # export KBUILD_OUTPUT=dir/to/store/output/files/
91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
95 # KBUILD_SRC is set on invocation of make in OBJ directory
96 # KBUILD_SRC is not intended to be used by the regular user (for now)
99 # OK, Make called in directory where kernel src resides
100 # Do we want to locate output files in a separate directory?
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT
:= $(O
)
107 # That's our default target when none is given on the command line
111 ifneq ($(KBUILD_OUTPUT
),)
112 # Invoke a second make in the output directory, passing relevant variables
113 # check that the output directory actually exists
114 saved-output
:= $(KBUILD_OUTPUT
)
115 KBUILD_OUTPUT
:= $(shell cd
$(KBUILD_OUTPUT
) && /bin
/pwd
)
116 $(if
$(KBUILD_OUTPUT
),, \
117 $(error output directory
"$(saved-output)" does not exist
))
118 # Check that OUTPUT directory is not the same as where we have kernel src
119 $(if
$(filter-out $(KBUILD_OUTPUT
),$(shell /bin
/pwd
)),, \
120 $(error Output directory
(O
=...
) specifies kernel src
dir))
121 PHONY
+= $(MAKECMDGOALS
)
123 $(filter-out _all
,$(MAKECMDGOALS
)) _all
:
124 $(if
$(KBUILD_VERBOSE
:1=),@
)$(MAKE
) -C
$(KBUILD_OUTPUT
) \
125 KBUILD_SRC
=$(CURDIR
) \
126 KBUILD_EXTMOD
="$(KBUILD_EXTMOD)" -f
$(CURDIR
)/Makefile
$@
128 # Leave processing to above invocation of make
130 endif # ifneq ($(KBUILD_OUTPUT),)
131 endif # ifeq ($(KBUILD_SRC),)
133 # We process the rest of the Makefile if this is the final invocation of make
134 ifeq ($(skip-makefile
),)
136 # If building an external module we do not care about the all: rule
137 # but instead _all depend on modules
139 ifeq ($(KBUILD_EXTMOD
),)
145 srctree
:= $(if
$(KBUILD_SRC
),$(KBUILD_SRC
),$(CURDIR
))
147 # FIXME - TOPDIR is obsolete, use srctree/objtree
152 VPATH
:= $(srctree
)$(if
$(KBUILD_EXTMOD
),:$(KBUILD_EXTMOD
))
154 export srctree objtree VPATH TOPDIR
157 # SUBARCH tells the usermode build what the underlying arch is. That is set
158 # first, and if a usermode build is happening, the "ARCH=um" on the command
159 # line overrides the setting of ARCH below. If a native build is happening,
160 # then ARCH is assigned, getting whatever value it gets normally, and
161 # SUBARCH is subsequently ignored.
163 SUBARCH
:= $(shell uname
-m | sed
-e s
/i
.86/i386
/ -e s
/sun4u
/sparc64
/ \
164 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
165 -e s
/s390x
/s390
/ -e s
/parisc64
/parisc
/ \
166 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ )
168 # Cross compiling and selecting different set of gcc/bin-utils
169 # ---------------------------------------------------------------------------
171 # When performing cross compilation for other architectures ARCH shall be set
172 # to the target architecture. (See arch/* for the possibilities).
173 # ARCH can be set during invocation of make:
175 # Another way is to have ARCH set in the environment.
176 # The default ARCH is the host where make is executed.
178 # CROSS_COMPILE specify the prefix used for all executables used
179 # during compilation. Only gcc and related bin-utils executables
180 # are prefixed with $(CROSS_COMPILE).
181 # CROSS_COMPILE can be set on the command line
182 # make CROSS_COMPILE=ia64-linux-
183 # Alternatively CROSS_COMPILE can be set in the environment.
184 # Default value for CROSS_COMPILE is not to prefix executables
185 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
190 # Architecture as present in compile.h
191 UTS_MACHINE
:= $(ARCH
)
194 KCONFIG_CONFIG ?
= .config
196 # SHELL used by kbuild
197 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
198 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
199 else echo sh
; fi
; fi
)
203 HOSTCFLAGS
= -Wall
-Wstrict-prototypes
-O2
-fomit-frame-pointer
206 # Decide whether to build built-in, modular, or both.
207 # Normally, just do built-in.
212 # If we have only "make modules", don't compile built-in objects.
213 # When we're building modules with modversions, we need to consider
214 # the built-in objects during the descend as well, in order to
215 # make sure the checksums are up to date before we record them.
217 ifeq ($(MAKECMDGOALS
),modules
)
218 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
221 # If we have "make <whatever> modules", compile modules
222 # in addition to whatever we do anyway.
223 # Just "make" or "make all" shall build modules as well
225 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
229 ifeq ($(MAKECMDGOALS
),)
233 export KBUILD_MODULES KBUILD_BUILTIN
234 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
237 # ---------------------------------------------------------------------------
239 # Normally, we echo the whole command before executing it. By making
240 # that echo $($(quiet)$(cmd)), we now have the possibility to set
241 # $(quiet) to choose other forms of output instead, e.g.
243 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
244 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
246 # If $(quiet) is empty, the whole command will be printed.
247 # If it is set to "quiet_", only the short version will be printed.
248 # If it is set to "silent_", nothing will be printed at all, since
249 # the variable $(silent_cmd_cc_o_c) doesn't exist.
251 # A simple variant is to prefix commands with $(Q) - that's useful
252 # for commands that shall be hidden in non-verbose mode.
256 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
257 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
259 ifeq ($(KBUILD_VERBOSE
),1)
267 # If the user is running make -s (silent mode), suppress echoing of
270 ifneq ($(findstring s
,$(MAKEFLAGS
)),)
274 export quiet Q KBUILD_VERBOSE
277 # Look for make include files relative to root of kernel src
278 MAKEFLAGS
+= --include-dir
=$(srctree
)
280 # We need some generic definitions.
281 include $(srctree
)/scripts
/Kbuild.
include
283 # Make variables (CC, etc...)
285 AS
= $(CROSS_COMPILE
)as
286 LD
= $(CROSS_COMPILE
)ld
287 CC
= $(CROSS_COMPILE
)gcc
289 AR
= $(CROSS_COMPILE
)ar
290 NM
= $(CROSS_COMPILE
)nm
291 STRIP
= $(CROSS_COMPILE
)strip
292 OBJCOPY
= $(CROSS_COMPILE
)objcopy
293 OBJDUMP
= $(CROSS_COMPILE
)objdump
295 GENKSYMS
= scripts
/genksyms
/genksyms
296 DEPMOD
= /sbin
/depmod
297 KALLSYMS
= scripts
/kallsyms
301 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__
-Wbitwise
$(CF
)
303 CFLAGS_MODULE
= $(MODFLAGS
)
304 AFLAGS_MODULE
= $(MODFLAGS
)
310 # Use LINUXINCLUDE when you must reference the include/ directory.
311 # Needed to be compatible with the O= option
312 LINUXINCLUDE
:= -Iinclude \
313 $(if
$(KBUILD_SRC
),-Iinclude2
-I
$(srctree
)/include) \
314 -include include/linux
/autoconf.h
316 CPPFLAGS
:= -D__KERNEL__
$(LINUXINCLUDE
)
318 CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
319 -fno-strict-aliasing
-fno-common \
320 -Werror-implicit-function-declaration
321 AFLAGS
:= -D__ASSEMBLY__
323 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
324 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
325 KERNELVERSION
= $(VERSION
).
$(PATCHLEVEL
).
$(SUBLEVEL
)$(EXTRAVERSION
)
327 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
328 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
329 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
330 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
332 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
333 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
334 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
336 # When compiling out-of-tree modules, put MODVERDIR in the module
337 # tree rather than in the kernel tree. The kernel tree might
339 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
341 # Files to ignore in find ... statements
343 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
344 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn
--exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
346 # ===========================================================================
347 # Rules shared between *config targets and build targets
349 # Basic helpers built in scripts/
350 PHONY
+= scripts_basic
352 $(Q
)$(MAKE
) $(build
)=scripts
/basic
354 # To avoid any implicit rule to kick in, define an empty command.
355 scripts
/basic
/%: scripts_basic
;
357 PHONY
+= outputmakefile
358 # outputmakefile generates a Makefile in the output directory, if using a
359 # separate output directory. This allows convenient use of make in the
362 ifneq ($(KBUILD_SRC
),)
363 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
364 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
367 # To make sure we do not include .config for any of the *config targets
368 # catch them early, and hand them over to scripts/kconfig/Makefile
369 # It is allowed to specify more targets when calling make, including
370 # mixing *config targets and build targets.
371 # For example 'make oldconfig all'.
372 # Detect when mixed targets is specified, and make a second invocation
373 # of make so .config is not included in this case either (for *config).
375 no-dot-config-targets
:= clean mrproper
distclean \
376 cscope TAGS
tags help
%docs
check% \
377 include/linux
/version.h headers_
% \
378 kernelrelease kernelversion
384 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
385 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
390 ifeq ($(KBUILD_EXTMOD
),)
391 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
393 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
399 ifeq ($(mixed-targets
),1)
400 # ===========================================================================
401 # We're called with mixed targets (*config and build targets).
402 # Handle them one by one.
405 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
408 ifeq ($(config-targets
),1)
409 # ===========================================================================
410 # *config targets only - make sure prerequisites are updated, and descend
411 # in scripts/kconfig to make the *config target
413 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
414 # KBUILD_DEFCONFIG may point out an alternative default configuration
415 # used for 'make defconfig'
416 include $(srctree
)/arch
/$(ARCH
)/Makefile
417 export KBUILD_DEFCONFIG
419 config
%config
: scripts_basic outputmakefile FORCE
420 $(Q
)mkdir
-p
include/linux
include/config
421 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
424 # ===========================================================================
425 # Build targets only - this includes vmlinux, arch specific targets, clean
426 # targets and others. In general all targets except *config targets.
428 ifeq ($(KBUILD_EXTMOD
),)
429 # Additional helpers built in scripts/
430 # Carefully list dependencies so we do not try to build scripts twice
433 scripts
: scripts_basic
include/config
/auto.conf
434 $(Q
)$(MAKE
) $(build
)=$(@
)
436 # Objects we will link into vmlinux / subdirs we need to visit
438 drivers-y
:= drivers
/ sound
/
442 endif # KBUILD_EXTMOD
444 ifeq ($(dot-config
),1)
446 -include include/config
/auto.conf
448 ifeq ($(KBUILD_EXTMOD
),)
449 # Read in dependencies to all Kconfig* files, make sure to run
450 # oldconfig if changes are detected.
451 -include include/config
/auto.conf.cmd
453 # To avoid any implicit rule to kick in, define an empty command
454 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
456 # If .config is newer than include/config/auto.conf, someone tinkered
457 # with it and forgot to run make oldconfig.
458 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
459 # we execute the config step to be sure to catch updated Kconfig files
460 include/config
/auto.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
461 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
463 # external modules needs include/linux/autoconf.h and include/config/auto.conf
464 # but do not care if they are up-to-date. Use auto.conf to trigger the test
465 PHONY
+= include/config
/auto.conf
467 include/config
/auto.conf
:
468 $(Q
)test -e
include/linux
/autoconf.h
-a
-e
$@ ||
( \
470 echo
" ERROR: Kernel configuration is invalid."; \
471 echo
" include/linux/autoconf.h or $@ are missing."; \
472 echo
" Run 'make oldconfig && make prepare' on kernel src to fix it."; \
476 endif # KBUILD_EXTMOD
479 # Dummy target needed, because used as prerequisite
480 include/config
/auto.conf
: ;
481 endif # $(dot-config)
483 # The all: target is the default when no target is given on the
485 # This allow a user to issue only 'make' to build a kernel including modules
486 # Defaults vmlinux but it is usually overridden in the arch makefile
489 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
495 include $(srctree
)/arch
/$(ARCH
)/Makefile
497 ifdef CONFIG_FRAME_POINTER
498 CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
500 CFLAGS
+= -fomit-frame-pointer
503 ifdef CONFIG_DEBUG_INFO
508 # Force gcc to behave correct even for buggy distributions
509 CFLAGS
+= $(call cc-option
, -fno-stack-protector
)
511 # arch Makefile may override CC so keep this after arch Makefile is included
512 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
513 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
515 # warn about C99 declaration after statement
516 CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
518 # disable pointer signed / unsigned warnings in gcc 4.0
519 CFLAGS
+= $(call cc-option
,-Wno-pointer-sign
,)
521 # Use --build-id when available.
522 LDFLAGS_BUILD_ID
= $(patsubst -Wl
$(comma
)%,%,\
523 $(call ld-option
, -Wl
$(comma
)--build-id
,))
524 LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
525 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
527 # Default kernel image to build when no specific target is given.
528 # KBUILD_IMAGE may be overruled on the command line or
529 # set in the environment
530 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
532 export KBUILD_IMAGE ?
= vmlinux
535 # INSTALL_PATH specifies where to place the updated kernel and system map
536 # images. Default is /boot, but you can set it to other values
537 export INSTALL_PATH ?
= /boot
540 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
541 # relocations required by build roots. This is not defined in the
542 # makefile but the argument can be passed to make if needed.
545 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
549 # INSTALL_MOD_STRIP, if defined, will cause modules to be
550 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
551 # the default option --strip-debug will be used. Otherwise,
552 # INSTALL_MOD_STRIP will used as the options to the strip command.
554 ifdef INSTALL_MOD_STRIP
555 ifeq ($(INSTALL_MOD_STRIP
),1)
556 mod_strip_cmd
= $(STRIP
) --strip-debug
558 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
559 endif # INSTALL_MOD_STRIP=1
562 endif # INSTALL_MOD_STRIP
566 ifeq ($(KBUILD_EXTMOD
),)
567 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
569 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
570 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
571 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
573 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
575 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
576 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
578 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
579 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
580 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
581 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
582 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
583 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
584 libs-y
:= $(libs-y1
) $(libs-y2
)
587 # ---------------------------------------------------------------------------
588 # vmlinux is built from the objects selected by $(vmlinux-init) and
589 # $(vmlinux-main). Most are built-in.o files from top-level directories
590 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
591 # Ordering when linking is important, and $(vmlinux-init) must be first.
596 # +-< $(vmlinux-init)
597 # | +--< init/version.o + more
599 # +--< $(vmlinux-main)
600 # | +--< driver/built-in.o mm/built-in.o + more
602 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
604 # vmlinux version (uname -v) cannot be updated during normal
605 # descending-into-subdirs phase since we do not yet know if we need to
607 # Therefore this step is delayed until just before final link of vmlinux -
608 # except in the kallsyms case where it is done just before adding the
609 # symbols to the kernel.
611 # System.map is generated to document addresses of all kernel symbols
613 vmlinux-init
:= $(head-y
) $(init-y
)
614 vmlinux-main
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
615 vmlinux-all
:= $(vmlinux-init
) $(vmlinux-main
)
616 vmlinux-lds
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
617 export KBUILD_VMLINUX_OBJS
:= $(vmlinux-all
)
619 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
620 # May be overridden by arch/$(ARCH)/Makefile
621 quiet_cmd_vmlinux__ ?
= LD
$@
622 cmd_vmlinux__ ?
= $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
) -o
$@ \
623 -T
$(vmlinux-lds
) $(vmlinux-init
) \
624 --start-group
$(vmlinux-main
) --end-group \
625 $(filter-out $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) vmlinux.o FORCE
,$^
)
627 # Generate new vmlinux version
628 quiet_cmd_vmlinux_version
= GEN .version
629 cmd_vmlinux_version
= set
-e
; \
630 if
[ ! -r .version
]; then \
634 mv .version .old_version
; \
635 expr
0$$(cat .old_version
) + 1 >.version
; \
637 $(MAKE
) $(build
)=init
639 # Generate System.map
640 quiet_cmd_sysmap
= SYSMAP
641 cmd_sysmap
= $(CONFIG_SHELL
) $(srctree
)/scripts
/mksysmap
644 # If CONFIG_KALLSYMS is set .version is already updated
645 # Generate System.map and verify that the content is consistent
646 # Use + in front of the vmlinux_version rule to silent warning with make -j2
647 # First command is ':' to allow us to use + in front of the rule
648 define rule_vmlinux__
650 $(if
$(CONFIG_KALLSYMS
),,+$(call cmd
,vmlinux_version
))
652 $(call cmd
,vmlinux__
)
653 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
655 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
656 echo
' $($(quiet)cmd_sysmap) System.map' &&) \
657 $(cmd_sysmap
) $@ System.map
; \
658 if
[ $$?
-ne
0 ]; then \
666 ifdef CONFIG_KALLSYMS
667 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
668 # It's a three stage process:
669 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
671 # Running kallsyms on that gives us .tmp_kallsyms1.o with
672 # the right size - vmlinux version (uname -v) is updated during this step
673 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
674 # but due to the added section, some addresses have shifted.
675 # From here, we generate a correct .tmp_kallsyms2.o
676 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
677 # o Verify that the System.map from vmlinux matches the map from
678 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
679 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
680 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
681 # temporary bypass to allow the kernel to be built while the
682 # maintainers work out what went wrong with kallsyms.
684 ifdef CONFIG_KALLSYMS_EXTRA_PASS
690 kallsyms.o
:= .tmp_kallsyms
$(last_kallsyms
).o
692 define verify_kallsyms
693 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
694 echo
' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
695 $(cmd_sysmap
) .tmp_vmlinux
$(last_kallsyms
) .tmp_System.map
696 $(Q
)cmp
-s System.map .tmp_System.map || \
697 (echo Inconsistent kallsyms data
; \
698 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS
; \
699 rm .tmp_kallsyms
* ; /bin
/false
)
702 # Update vmlinux version before link
703 # Use + in front of this rule to silent warning about make -j1
704 # First command is ':' to allow us to use + in front of this rule
705 cmd_ksym_ld
= $(cmd_vmlinux__
)
708 +$(call cmd
,vmlinux_version
)
709 $(call cmd
,vmlinux__
)
710 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
713 # Generate .S file with all kernel symbols
714 quiet_cmd_kallsyms
= KSYM
$@
715 cmd_kallsyms
= $(NM
) -n
$< |
$(KALLSYMS
) \
716 $(if
$(CONFIG_KALLSYMS_ALL
),--all-symbols
) > $@
718 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o
: %.o
: %.S scripts FORCE
719 $(call if_changed_dep
,as_o_S
)
721 .tmp_kallsyms
%.S
: .tmp_vmlinux
% $(KALLSYMS
)
724 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
725 .tmp_vmlinux1
: $(vmlinux-lds
) $(vmlinux-all
) FORCE
726 $(call if_changed_rule
,ksym_ld
)
728 .tmp_vmlinux2
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms1.o FORCE
729 $(call if_changed
,vmlinux__
)
731 .tmp_vmlinux3
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms2.o FORCE
732 $(call if_changed
,vmlinux__
)
734 # Needs to visit scripts/ before $(KALLSYMS) can be used.
735 $(KALLSYMS
): scripts
;
737 # Generate some data for debugging strange kallsyms problems
738 debug_kallsyms
: .tmp_map
$(last_kallsyms
)
740 .tmp_map
%: .tmp_vmlinux
% FORCE
741 ($(OBJDUMP
) -h
$< |
$(AWK
) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM
) $<) |
sort > $@
747 endif # ifdef CONFIG_KALLSYMS
749 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
750 # relevant sections renamed as per the linker script.
751 quiet_cmd_vmlinux-modpost
= LD
$@
752 cmd_vmlinux-modpost
= $(LD
) $(LDFLAGS
) -r
-o
$@ \
753 $(vmlinux-init
) --start-group
$(vmlinux-main
) --end-group \
754 $(filter-out $(vmlinux-init
) $(vmlinux-main
) $(vmlinux-lds
) FORCE
,$^
)
755 define rule_vmlinux-modpost
757 +$(call cmd
,vmlinux-modpost
)
758 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
$@
759 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target
).cmd
762 # vmlinux image - including updated kernel symbols
763 vmlinux
: $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) $(kallsyms.o
) vmlinux.o FORCE
764 ifdef CONFIG_HEADERS_CHECK
765 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
767 $(call vmlinux-modpost
)
768 $(call if_changed_rule
,vmlinux__
)
769 $(Q
)rm -f .old_version
771 vmlinux.o
: $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) $(kallsyms.o
) FORCE
772 $(call if_changed_rule
,vmlinux-modpost
)
774 # The actual objects are generated when descending,
775 # make sure no implicit rule kicks in
776 $(sort $(vmlinux-init
) $(vmlinux-main
)) $(vmlinux-lds
): $(vmlinux-dirs
) ;
778 # Handle descending into subdirectories listed in $(vmlinux-dirs)
779 # Preset locale variables to speed up the build process. Limit locale
780 # tweaks to this spot to avoid wrong language settings when running
781 # make menuconfig etc.
782 # Error messages still appears in the original language
784 PHONY
+= $(vmlinux-dirs
)
785 $(vmlinux-dirs
): prepare scripts
786 $(Q
)$(MAKE
) $(build
)=$@
788 # Build the kernel release string
790 # The KERNELRELEASE value built here is stored in the file
791 # include/config/kernel.release, and is used when executing several
792 # make targets, such as "make install" or "make modules_install."
794 # The eventual kernel release string consists of the following fields,
795 # shown in a hierarchical format to show how smaller parts are concatenated
796 # to form the larger and final value, with values coming from places like
797 # the Makefile, kernel config options, make command line options and/or
798 # SCM tag information.
802 # $(PATCHLEVEL) eg, 6
804 # $(EXTRAVERSION) eg, -rc6
807 # localversion* (files without backups, containing '~')
808 # $(CONFIG_LOCALVERSION) (from kernel config setting)
809 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
810 # ./scripts/setlocalversion (SCM tag, if one exists)
811 # $(LOCALVERSION) (from make command line if provided)
813 # Note how the final $(localver-auto) string is included *only* if the
814 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
815 # moment, only git is supported but other SCMs can edit the script
816 # scripts/setlocalversion and add the appropriate checks as needed.
818 pattern
= ".*/localversion[^~]*"
819 string
= $(shell cat
/dev
/null \
820 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
822 localver
= $(subst $(space
),, $(string
) \
823 $(patsubst "%",%,$(CONFIG_LOCALVERSION
)))
825 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
826 # and if the SCM is know a tag from the SCM is appended.
827 # The appended tag is determined by the SCM used.
829 # Currently, only git is supported.
830 # Other SCMs can edit scripts/setlocalversion and add the appropriate
832 ifdef CONFIG_LOCALVERSION_AUTO
833 _localver-auto
= $(shell $(CONFIG_SHELL
) \
834 $(srctree
)/scripts
/setlocalversion
$(srctree
))
835 localver-auto
= $(LOCALVERSION
)$(_localver-auto
)
838 localver-full
= $(localver
)$(localver-auto
)
840 # Store (new) KERNELRELASE string in include/config/kernel.release
841 kernelrelease
= $(KERNELVERSION
)$(localver-full
)
842 include/config
/kernel.release
: include/config
/auto.conf FORCE
844 $(Q
)echo
$(kernelrelease
) > $@
847 # Things we need to do before we recursively start building the kernel
848 # or the modules are listed in "prepare".
849 # A multi level approach is used. prepareN is processed before prepareN-1.
850 # archprepare is used in arch Makefiles and when processed asm symlink,
851 # version.h and scripts_basic is processed / created.
853 # Listed in dependency order
854 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
856 # prepare3 is used to check if we are building in a separate output directory,
858 # 1) Check that make has not been executed in the kernel src $(srctree)
859 # 2) Create the include2 directory, used for the second asm symlink
860 prepare3
: include/config
/kernel.release
861 ifneq ($(KBUILD_SRC
),)
862 @echo
' Using $(srctree) as source for kernel'
863 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
864 echo
" $(srctree) is not clean, please run 'make mrproper'";\
865 echo
" in the '$(srctree)' directory.";\
868 $(Q
)if
[ ! -d include2
]; then mkdir
-p include2
; fi
;
869 $(Q
)ln
-fsn
$(srctree
)/include/asm-
$(SRCARCH
) include2
/asm
872 # prepare2 creates a makefile if using a separate output directory
873 prepare2
: prepare3 outputmakefile
875 prepare1
: prepare2
include/linux
/version.h
include/linux
/utsrelease.h \
876 include/asm
include/config
/auto.conf
877 ifneq ($(KBUILD_MODULES
),)
878 $(Q
)mkdir
-p
$(MODVERDIR
)
879 $(Q
)rm -f
$(MODVERDIR
)/*
882 archprepare
: prepare1 scripts_basic
884 prepare0
: archprepare FORCE
885 $(Q
)$(MAKE
) $(build
)=.
886 $(Q
)$(MAKE
) $(build
)=. missing-syscalls
888 # All the preparing..
891 # Leave this as default for preprocessing vmlinux.lds.S, which is now
892 # done in arch/$(ARCH)/kernel/Makefile
894 export CPPFLAGS_vmlinux.lds
+= -P
-C
-U
$(ARCH
)
896 # FIXME: The asm symlink changes when $(ARCH) changes. That's
897 # hard to detect, but I suppose "make mrproper" is a good idea
898 # before switching between archs anyway.
901 @echo
' SYMLINK $@ -> include/asm-$(SRCARCH)'
902 $(Q
)if
[ ! -d
include ]; then mkdir
-p
include; fi
;
903 @ln
-fsn asm-
$(SRCARCH
) $@
905 # Generate some files
906 # ---------------------------------------------------------------------------
908 # KERNELRELEASE can change from a few different places, meaning version.h
909 # needs to be updated, so this check is forced on all builds
912 define filechk_utsrelease.h
913 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
914 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
917 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
920 define filechk_version.h
921 (echo \
#define LINUX_VERSION_CODE $(shell \
922 expr
$(VERSION
) \
* 65536 + $(PATCHLEVEL
) \
* 256 + $(SUBLEVEL
)); \
923 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
926 include/linux
/version.h
: $(srctree
)/Makefile FORCE
927 $(call filechk
,version.h
)
929 include/linux
/utsrelease.h
: include/config
/kernel.release FORCE
930 $(call filechk
,utsrelease.h
)
932 # ---------------------------------------------------------------------------
936 @echo
'*** Warning: make $@ is unnecessary now.'
938 # ---------------------------------------------------------------------------
940 INSTALL_HDR_PATH
=$(objtree
)/usr
941 export INSTALL_HDR_PATH
943 HDRFILTER
=generic i386 x86_64
944 HDRARCHES
=$(filter-out $(HDRFILTER
),$(patsubst $(srctree
)/include/asm-
%/Kbuild
,%,$(wildcard $(srctree
)/include/asm-
*/Kbuild
)))
946 PHONY
+= headers_install_all
947 headers_install_all
: include/linux
/version.h scripts_basic FORCE
948 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
949 $(Q
)for arch in
$(HDRARCHES
); do \
950 $(MAKE
) ARCH
=$$arch -f
$(srctree
)/scripts
/Makefile.headersinst obj
=include BIASMDIR
=-bi-
$$arch ;\
953 PHONY
+= headers_install
954 headers_install
: include/linux
/version.h scripts_basic FORCE
955 @if
[ ! -r
$(srctree
)/include/asm-
$(SRCARCH
)/Kbuild
]; then \
956 echo
'*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
958 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
959 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.headersinst ARCH
=$(SRCARCH
) obj
=include
961 PHONY
+= headers_check_all
962 headers_check_all
: headers_install_all
963 $(Q
)for arch in
$(HDRARCHES
); do \
964 $(MAKE
) ARCH
=$$arch -f
$(srctree
)/scripts
/Makefile.headersinst obj
=include BIASMDIR
=-bi-
$$arch HDRCHECK
=1 ;\
967 PHONY
+= headers_check
968 headers_check
: headers_install
969 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.headersinst ARCH
=$(SRCARCH
) obj
=include HDRCHECK
=1
971 # ---------------------------------------------------------------------------
976 # By default, build modules as well
983 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
)
984 @echo
' Building modules, stage 2.';
985 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
988 # Target to prepare building external modules
989 PHONY
+= modules_prepare
990 modules_prepare
: prepare scripts
992 # Target to install modules
993 PHONY
+= modules_install
994 modules_install
: _modinst_ _modinst_post
998 @if
[ -z
"`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
999 echo
"Warning: you may need to install module-init-tools"; \
1000 echo
"See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1003 @
rm -rf
$(MODLIB
)/kernel
1004 @
rm -f
$(MODLIB
)/source
1005 @mkdir
-p
$(MODLIB
)/kernel
1006 @ln
-s
$(srctree
) $(MODLIB
)/source
1007 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1008 rm -f
$(MODLIB
)/build
; \
1009 ln
-s
$(objtree
) $(MODLIB
)/build
; \
1011 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1013 # If System.map exists, run depmod. This deliberately does not have a
1014 # dependency on System.map since that would run the dependency tree on
1015 # vmlinux. This depmod is only for convenience to give the initial
1016 # boot a modules.dep even before / is mounted read-write. However the
1017 # boot script depmod is the master version.
1018 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
1021 depmod_opts
:= -b
$(INSTALL_MOD_PATH
) -r
1023 PHONY
+= _modinst_post
1024 _modinst_post
: _modinst_
1025 if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then
$(DEPMOD
) -ae
-F System.map
$(depmod_opts
) $(KERNELRELEASE
); fi
1027 else # CONFIG_MODULES
1029 # Modules not configured
1030 # ---------------------------------------------------------------------------
1032 modules modules_install
: FORCE
1034 @echo
"The present kernel configuration has modules disabled."
1035 @echo
"Type 'make config' and enable loadable module support."
1036 @echo
"Then build a kernel with module support enabled."
1040 endif # CONFIG_MODULES
1043 # Cleaning is done on three levels.
1044 # make clean Delete most generated files
1045 # Leave enough to build external modules
1046 # make mrproper Delete the current configuration, and all generated files
1047 # make distclean Remove editor backup files, patch leftover files and the like
1049 # Directories & files removed with 'make clean'
1050 CLEAN_DIRS
+= $(MODVERDIR
)
1051 CLEAN_FILES
+= vmlinux System.map \
1052 .tmp_kallsyms
* .tmp_version .tmp_vmlinux
* .tmp_System.map
1054 # Directories & files removed with 'make mrproper'
1055 MRPROPER_DIRS
+= include/config include2 usr
/include
1056 MRPROPER_FILES
+= .config .config.old
include/asm .version .old_version \
1057 include/linux
/autoconf.h
include/linux
/version.h \
1058 include/linux
/utsrelease.h \
1059 Module.symvers
tags TAGS cscope
*
1061 # clean - Delete most, but leave enough to build external modules
1063 clean: rm-dirs
:= $(CLEAN_DIRS
)
1064 clean: rm-files
:= $(CLEAN_FILES
)
1065 clean-dirs
:= $(addprefix _clean_
,$(srctree
) $(vmlinux-alldirs
))
1067 PHONY
+= $(clean-dirs
) clean archclean
1069 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1071 clean: archclean
$(clean-dirs
)
1074 @find .
$(RCS_FIND_IGNORE
) \
1075 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1076 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1077 -o
-name
'*.symtypes' \
) \
1078 -type f
-print | xargs
rm -f
1080 # mrproper - Delete all generated files, including .config
1082 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1083 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1084 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
1086 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1088 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1090 mrproper
: clean archmrproper
$(mrproper-dirs
)
1099 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1100 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1101 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1102 -o
-name
'.*.rej' -o
-size
0 \
1103 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
1104 -type f
-print | xargs
rm -f
1107 # Packaging of the kernel to various formats
1108 # ---------------------------------------------------------------------------
1109 # rpm target kept for backward compatibility
1110 package-dir
:= $(srctree
)/scripts
/package
1112 %pkg
: include/config
/kernel.release FORCE
1113 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1114 rpm
: include/config
/kernel.release FORCE
1115 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1118 # Brief documentation of the typical targets used
1119 # ---------------------------------------------------------------------------
1121 boards
:= $(wildcard $(srctree
)/arch
/$(ARCH
)/configs
/*_defconfig
)
1122 boards
:= $(notdir $(boards
))
1125 @echo
'Cleaning targets:'
1126 @echo
' clean - Remove most generated files but keep the config and'
1127 @echo
' enough build support to build external modules'
1128 @echo
' mrproper - Remove all generated files + config + various backup files'
1129 @echo
' distclean - mrproper + remove editor backup and patch files'
1131 @echo
'Configuration targets:'
1132 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1134 @echo
'Other generic targets:'
1135 @echo
' all - Build all targets marked with [*]'
1136 @echo
'* vmlinux - Build the bare kernel'
1137 @echo
'* modules - Build all modules'
1138 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1139 @echo
' dir/ - Build all files in dir and below'
1140 @echo
' dir/file.[ois] - Build specified target only'
1141 @echo
' dir/file.ko - Build module including final link'
1142 @echo
' rpm - Build a kernel as an RPM package'
1143 @echo
' tags/TAGS - Generate tags file for editors'
1144 @echo
' cscope - Generate cscope index'
1145 @echo
' kernelrelease - Output the release version string'
1146 @echo
' kernelversion - Output the version stored in Makefile'
1147 @if
[ -r
$(srctree
)/include/asm-
$(SRCARCH
)/Kbuild
]; then \
1148 echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1149 echo
' (default: $(INSTALL_HDR_PATH))'; \
1152 @echo
'Static analysers'
1153 @echo
' checkstack - Generate a list of stack hogs'
1154 @echo
' namespacecheck - Name space analysis on compiled kernel'
1155 @if
[ -r
$(srctree
)/include/asm-
$(SRCARCH
)/Kbuild
]; then \
1156 echo
' headers_check - Sanity check on exported headers'; \
1159 @echo
'Kernel packaging:'
1160 @
$(MAKE
) $(build
)=$(package-dir
) help
1162 @echo
'Documentation targets:'
1163 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1165 @echo
'Architecture specific targets ($(ARCH)):'
1166 @
$(if
$(archhelp
),$(archhelp
),\
1167 echo
' No architecture specific help defined for $(ARCH)')
1170 $(foreach b
, $(boards
), \
1171 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1174 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1175 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1176 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1177 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1178 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1180 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1181 @echo
'For further info see the ./README file'
1184 # Documentation targets
1185 # ---------------------------------------------------------------------------
1186 %docs
: scripts_basic FORCE
1187 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1189 else # KBUILD_EXTMOD
1192 # External module support.
1193 # When building external modules the kernel used as basis is considered
1194 # read-only, and no consistency checks are made and the make
1195 # system is not used on the basis kernel. If updates are required
1196 # in the basis kernel ordinary make commands (without M=...) must
1199 # The following are the only valid targets when building external
1201 # make M=dir clean Delete all automatically generated files
1202 # make M=dir modules Make all modules in specified dir
1203 # make M=dir Same as 'make M=dir modules'
1204 # make M=dir modules_install
1205 # Install the modules built in the module directory
1206 # Assumes install directory is already created
1208 # We are always building modules
1210 PHONY
+= crmodverdir
1212 $(Q
)mkdir
-p
$(MODVERDIR
)
1213 $(Q
)rm -f
$(MODVERDIR
)/*
1215 PHONY
+= $(objtree
)/Module.symvers
1216 $(objtree
)/Module.symvers
:
1217 @
test -e
$(objtree
)/Module.symvers ||
( \
1219 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1220 echo
" is missing; modules will have no dependencies and modversions."; \
1223 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1224 PHONY
+= $(module-dirs
) modules
1225 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1226 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1228 modules
: $(module-dirs
)
1229 @echo
' Building modules, stage 2.';
1230 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1232 PHONY
+= modules_install
1233 modules_install
: _emodinst_ _emodinst_post
1235 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1238 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1239 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1241 # Run depmod only is we have System.map and depmod is executable
1242 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1243 cmd_depmod
= if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then \
1244 $(DEPMOD
) -ae
-F System.map \
1245 $(if
$(strip $(INSTALL_MOD_PATH
)), \
1246 -b
$(INSTALL_MOD_PATH
) -r
) \
1250 PHONY
+= _emodinst_post
1251 _emodinst_post
: _emodinst_
1254 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1256 PHONY
+= $(clean-dirs
) clean
1258 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1260 clean: rm-dirs
:= $(MODVERDIR
)
1261 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers
1262 clean: $(clean-dirs
)
1265 @find
$(KBUILD_EXTMOD
) $(RCS_FIND_IGNORE
) \
1266 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1267 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
) \
1268 -type f
-print | xargs
rm -f
1271 @echo
' Building external modules.'
1272 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1274 @echo
' modules - default target, build the module(s)'
1275 @echo
' modules_install - install the module'
1276 @echo
' clean - remove generated files in module directory only'
1280 PHONY
+= prepare scripts
1283 endif # KBUILD_EXTMOD
1285 # Generate tags for editors
1286 # ---------------------------------------------------------------------------
1288 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1289 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1290 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1292 ifeq ($(src
),$(obj
))
1295 __srctree
= $(srctree
)/
1298 ifeq ($(ALLSOURCE_ARCHS
),)
1300 ALLINCLUDE_ARCHS
:= $(ARCH
) $(SUBARCH
)
1302 ALLINCLUDE_ARCHS
:= $(SRCARCH
)
1305 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1306 ALLINCLUDE_ARCHS
:= $(ALLSOURCE_ARCHS
)
1309 # Take care of arch/x86
1310 ifeq ($(ARCH
), $(SRCARCH
))
1311 ALLSOURCE_ARCHS
:= $(ARCH
)
1313 ALLSOURCE_ARCHS
:= $(ARCH
) $(SRCARCH
)
1317 ( for ARCH in
$(ALLSOURCE_ARCHS
) ; do \
1318 find
$(__srctree
)arch
/$${SRCARCH} $(RCS_FIND_IGNORE
) \
1321 find
$(__srctree
)security
/selinux
/include $(RCS_FIND_IGNORE
) \
1323 find
$(__srctree
)include $(RCS_FIND_IGNORE
) \
1324 \
( -name config
-o
-name
'asm-*' \
) -prune \
1325 -o
-name
$1 -print; \
1326 for ARCH in
$(ALLINCLUDE_ARCHS
) ; do \
1327 find
$(__srctree
)include/asm-
$${SRCARCH} $(RCS_FIND_IGNORE
) \
1330 find
$(__srctree
)include/asm-generic
$(RCS_FIND_IGNORE
) \
1332 find
$(__srctree
) $(RCS_FIND_IGNORE
) \
1333 \
( -name
include -o
-name arch \
) -prune
-o \
1339 $(call find-sources
,'*.[chS]')
1342 $(call find-sources
,'Kconfig*')
1344 define all-defconfigs
1345 $(call find-sources
,'defconfig')
1349 if
$1 --version
2>&1 | grep
-iq exuberant
; then \
1350 $(all-sources
) | xargs
$1 -a \
1351 -I __initdata
,__exitdata
,__acquires
,__releases \
1352 -I EXPORT_SYMBOL
,EXPORT_SYMBOL_GPL \
1353 --extra
=+f
--c-kinds
=+px \
1354 --regex-asm
='/^ENTRY\(([^)]*)\).*/\1/'; \
1355 $(all-kconfigs
) | xargs
$1 -a \
1357 --language-force
=kconfig \
1358 --regex-kconfig
='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1359 $(all-defconfigs
) | xargs
-r
$1 -a \
1360 --langdef
=dotconfig \
1361 --language-force
=dotconfig \
1362 --regex-dotconfig
='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1363 elif
$1 --version
2>&1 | grep
-iq emacs
; then \
1364 $(all-sources
) | xargs
$1 -a
; \
1365 $(all-kconfigs
) | xargs
$1 -a \
1366 --regex
='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1367 $(all-defconfigs
) | xargs
-r
$1 -a \
1368 --regex
='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1370 $(all-sources
) | xargs
$1 -a
; \
1374 quiet_cmd_cscope-file
= FILELST cscope.files
1375 cmd_cscope-file
= (echo \
-k
; echo \
-q
; $(all-sources
)) > cscope.files
1377 quiet_cmd_cscope
= MAKE cscope.out
1378 cmd_cscope
= cscope
-b
1381 $(call cmd
,cscope-file
)
1384 quiet_cmd_TAGS
= MAKE
$@
1393 quiet_cmd_tags
= MAKE
$@
1403 # Scripts to check various things for consistency
1404 # ---------------------------------------------------------------------------
1407 find
* $(RCS_FIND_IGNORE
) \
1408 -name
'*.[hcS]' -type f
-print |
sort \
1409 | xargs
$(PERL
) -w scripts
/checkincludes.pl
1412 find
* $(RCS_FIND_IGNORE
) \
1413 -name
'*.[hcS]' -type f
-print |
sort \
1414 | xargs
$(PERL
) -w scripts
/checkversion.pl
1417 $(PERL
) $(srctree
)/scripts
/namespace.pl
1419 endif #ifeq ($(config-targets),1)
1420 endif #ifeq ($(mixed-targets),1)
1422 PHONY
+= checkstack kernelrelease kernelversion
1424 # UML needs a little special treatment here. It wants to use the host
1425 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1426 # else wants $(ARCH), including people doing cross-builds, which means
1427 # that $(SUBARCH) doesn't work here.
1429 CHECKSTACK_ARCH
:= $(SUBARCH
)
1431 CHECKSTACK_ARCH
:= $(ARCH
)
1434 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1435 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1438 $(if
$(wildcard include/config
/kernel.release
), $(Q
)echo
$(KERNELRELEASE
), \
1439 $(error kernelrelease not valid
- run
'make prepare' to update it
))
1441 @echo
$(KERNELVERSION
)
1444 # ---------------------------------------------------------------------------
1445 # Single targets are compatible with:
1446 # - build whith mixed source and output
1447 # - build with separate output dir 'make O=...'
1448 # - external modules
1450 # target-dir => where to store outputfile
1451 # build-dir => directory in kernel source tree to use
1453 ifeq ($(KBUILD_EXTMOD
),)
1454 build-dir
= $(patsubst %/,%,$(dir $@
))
1455 target-dir
= $(dir $@
)
1457 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1458 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1459 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1462 %.s
: %.c prepare scripts FORCE
1463 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1464 %.i
: %.c prepare scripts FORCE
1465 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1466 %.o
: %.c prepare scripts FORCE
1467 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1468 %.lst
: %.c prepare scripts FORCE
1469 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1470 %.s
: %.S prepare scripts FORCE
1471 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1472 %.o
: %.S prepare scripts FORCE
1473 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1474 %.symtypes
: %.c prepare scripts FORCE
1475 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1478 / %/: prepare scripts FORCE
1479 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1480 $(build
)=$(build-dir
)
1481 %.ko
: prepare scripts FORCE
1482 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1483 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1484 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1486 # FIXME Should go into a make.lib or something
1487 # ===========================================================================
1489 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1490 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1492 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1493 cmd_rmfiles
= rm -f
$(rm-files
)
1496 a_flags
= -Wp
,-MD
,$(depfile
) $(AFLAGS
) $(AFLAGS_KERNEL
) \
1497 $(NOSTDINC_FLAGS
) $(CPPFLAGS
) \
1498 $(modkern_aflags
) $(EXTRA_AFLAGS
) $(AFLAGS_
$(basetarget
).o
)
1500 quiet_cmd_as_o_S
= AS
$@
1501 cmd_as_o_S
= $(CC
) $(a_flags
) -c
-o
$@
$<
1503 # read all saved command lines
1505 targets
:= $(wildcard $(sort $(targets
)))
1506 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1508 ifneq ($(cmd_files
),)
1509 $(cmd_files
): ; # Do not try to update included dependency files
1510 include $(cmd_files
)
1513 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1515 # $(Q)$(MAKE) $(clean)=dir
1516 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1518 endif # skip-makefile
1523 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1526 # Declare the contents of the .PHONY variable as phony. We keep that
1527 # information in a variable se we can use it in if_changed and friends.