5 NAME
= Man-Eating Seals of Antiquity
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 avoids hard-to-debug behaviour);
16 # o print "Entering directory ...";
17 MAKEFLAGS
+= -rR
--no-print-directory
19 # Avoid funny character set dependencies
23 export LC_COLLATE LC_NUMERIC
25 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right.
28 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.o targets which finally
32 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which is in that other dir
36 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicitly listed as the
41 # To put more focus on warnings, be less verbose as default
42 # Use 'make V=1' to see the full commands
44 ifeq ("$(origin V)", "command line")
51 # Call a source code checker (by default, "sparse") as part of the
54 # Use 'make C=1' to enable checking of only re-compiled files.
55 # Use 'make C=2' to enable checking of *all* source files, regardless
56 # of whether they are re-compiled or not.
58 # See the file "Documentation/sparse.txt" for more details, including
59 # where to get the "sparse" utility.
61 ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC
= $(C
)
64 ifndef KBUILD_CHECKSRC
68 # Use make M=dir to specify directory of external module to build
69 # Old syntax make ... SUBDIRS=$PWD is still supported
70 # Setting the environment variable KBUILD_EXTMOD take precedence
72 KBUILD_EXTMOD ?
= $(SUBDIRS
)
75 ifeq ("$(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?
101 ifeq ("$(origin O)", "command line")
102 KBUILD_OUTPUT
:= $(O
)
105 # That's our default target when none is given on the command line
109 # Cancel implicit rules on top Makefile
110 $(CURDIR
)/Makefile Makefile
: ;
112 ifneq ($(KBUILD_OUTPUT
),)
113 # Invoke a second make in the output directory, passing relevant variables
114 # check that the output directory actually exists
115 saved-output
:= $(KBUILD_OUTPUT
)
116 KBUILD_OUTPUT
:= $(shell cd
$(KBUILD_OUTPUT
) && /bin
/pwd
)
117 $(if
$(KBUILD_OUTPUT
),, \
118 $(error output directory
"$(saved-output)" does not exist
))
120 PHONY
+= $(MAKECMDGOALS
) sub-make
122 $(filter-out _all sub-make
$(CURDIR
)/Makefile
, $(MAKECMDGOALS
)) _all
: sub-make
126 $(if
$(KBUILD_VERBOSE
:1=),@
)$(MAKE
) -C
$(KBUILD_OUTPUT
) \
127 KBUILD_SRC
=$(CURDIR
) \
128 KBUILD_EXTMOD
="$(KBUILD_EXTMOD)" -f
$(CURDIR
)/Makefile \
129 $(filter-out _all sub-make
,$(MAKECMDGOALS
))
131 # Leave processing to above invocation of make
133 endif # ifneq ($(KBUILD_OUTPUT),)
134 endif # ifeq ($(KBUILD_SRC),)
136 # We process the rest of the Makefile if this is the final invocation of make
137 ifeq ($(skip-makefile
),)
139 # If building an external module we do not care about the all: rule
140 # but instead _all depend on modules
142 ifeq ($(KBUILD_EXTMOD
),)
148 srctree
:= $(if
$(KBUILD_SRC
),$(KBUILD_SRC
),$(CURDIR
))
153 VPATH
:= $(srctree
)$(if
$(KBUILD_EXTMOD
),:$(KBUILD_EXTMOD
))
155 export srctree objtree VPATH
158 # SUBARCH tells the usermode build what the underlying arch is. That is set
159 # first, and if a usermode build is happening, the "ARCH=um" on the command
160 # line overrides the setting of ARCH below. If a native build is happening,
161 # then ARCH is assigned, getting whatever value it gets normally, and
162 # SUBARCH is subsequently ignored.
164 SUBARCH
:= $(shell uname
-m | sed
-e s
/i
.86/i386
/ -e s
/sun4u
/sparc64
/ \
165 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
166 -e s
/s390x
/s390
/ -e s
/parisc64
/parisc
/ \
167 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
170 # Cross compiling and selecting different set of gcc/bin-utils
171 # ---------------------------------------------------------------------------
173 # When performing cross compilation for other architectures ARCH shall be set
174 # to the target architecture. (See arch/* for the possibilities).
175 # ARCH can be set during invocation of make:
177 # Another way is to have ARCH set in the environment.
178 # The default ARCH is the host where make is executed.
180 # CROSS_COMPILE specify the prefix used for all executables used
181 # during compilation. Only gcc and related bin-utils executables
182 # are prefixed with $(CROSS_COMPILE).
183 # CROSS_COMPILE can be set on the command line
184 # make CROSS_COMPILE=ia64-linux-
185 # Alternatively CROSS_COMPILE can be set in the environment.
186 # Default value for CROSS_COMPILE is not to prefix executables
187 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
188 export KBUILD_BUILDHOST
:= $(SUBARCH
)
192 # Architecture as present in compile.h
193 UTS_MACHINE
:= $(ARCH
)
196 # Additional ARCH settings for x86
200 ifeq ($(ARCH
),x86_64
)
204 # Additional ARCH settings for sparc
205 ifeq ($(ARCH
),sparc64
)
209 # Additional ARCH settings for sh
214 # Where to locate arch specific headers
215 hdr-arch
:= $(SRCARCH
)
217 ifeq ($(ARCH
),m68knommu
)
221 KCONFIG_CONFIG ?
= .config
223 # SHELL used by kbuild
224 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
225 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
226 else echo sh
; fi
; fi
)
230 HOSTCFLAGS
= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2
-fomit-frame-pointer
233 # Decide whether to build built-in, modular, or both.
234 # Normally, just do built-in.
239 # If we have only "make modules", don't compile built-in objects.
240 # When we're building modules with modversions, we need to consider
241 # the built-in objects during the descend as well, in order to
242 # make sure the checksums are up to date before we record them.
244 ifeq ($(MAKECMDGOALS
),modules
)
245 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
248 # If we have "make <whatever> modules", compile modules
249 # in addition to whatever we do anyway.
250 # Just "make" or "make all" shall build modules as well
252 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
256 ifeq ($(MAKECMDGOALS
),)
260 export KBUILD_MODULES KBUILD_BUILTIN
261 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
264 # ---------------------------------------------------------------------------
266 # Normally, we echo the whole command before executing it. By making
267 # that echo $($(quiet)$(cmd)), we now have the possibility to set
268 # $(quiet) to choose other forms of output instead, e.g.
270 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
271 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
273 # If $(quiet) is empty, the whole command will be printed.
274 # If it is set to "quiet_", only the short version will be printed.
275 # If it is set to "silent_", nothing will be printed at all, since
276 # the variable $(silent_cmd_cc_o_c) doesn't exist.
278 # A simple variant is to prefix commands with $(Q) - that's useful
279 # for commands that shall be hidden in non-verbose mode.
283 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
284 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
286 ifeq ($(KBUILD_VERBOSE
),1)
294 # If the user is running make -s (silent mode), suppress echoing of
297 ifneq ($(findstring s
,$(MAKEFLAGS
)),)
301 export quiet Q KBUILD_VERBOSE
304 # Look for make include files relative to root of kernel src
305 MAKEFLAGS
+= --include-dir
=$(srctree
)
307 # We need some generic definitions (do not try to remake the file).
308 $(srctree
)/scripts
/Kbuild.
include: ;
309 include $(srctree
)/scripts
/Kbuild.
include
311 # Make variables (CC, etc...)
313 AS
= $(CROSS_COMPILE
)as
314 LD
= $(CROSS_COMPILE
)ld
315 CC
= $(CROSS_COMPILE
)gcc
317 AR
= $(CROSS_COMPILE
)ar
318 NM
= $(CROSS_COMPILE
)nm
319 STRIP
= $(CROSS_COMPILE
)strip
320 OBJCOPY
= $(CROSS_COMPILE
)objcopy
321 OBJDUMP
= $(CROSS_COMPILE
)objdump
323 GENKSYMS
= scripts
/genksyms
/genksyms
324 INSTALLKERNEL
:= installkernel
325 DEPMOD
= /sbin
/depmod
326 KALLSYMS
= scripts
/kallsyms
330 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
331 -Wbitwise
-Wno-return-void
$(CF
)
333 CFLAGS_MODULE
= $(MODFLAGS
)
334 AFLAGS_MODULE
= $(MODFLAGS
)
335 LDFLAGS_MODULE
= -T
$(srctree
)/scripts
/module-common.lds
338 CFLAGS_GCOV
= -fprofile-arcs
-ftest-coverage
341 # Use LINUXINCLUDE when you must reference the include/ directory.
342 # Needed to be compatible with the O= option
343 LINUXINCLUDE
:= -I
$(srctree
)/arch
/$(hdr-arch
)/include -Iinclude \
344 $(if
$(KBUILD_SRC
), -I
$(srctree
)/include) \
345 -include include/generated
/autoconf.h
347 KBUILD_CPPFLAGS
:= -D__KERNEL__
349 KBUILD_CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
350 -fno-strict-aliasing
-fno-common \
351 -Werror-implicit-function-declaration \
352 -Wno-format-security \
353 -fno-delete-null-pointer-checks
354 KBUILD_AFLAGS
:= -D__ASSEMBLY__
356 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
358 KERNELVERSION
= $(VERSION
).
$(PATCHLEVEL
).
$(SUBLEVEL
)$(EXTRAVERSION
)
360 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
361 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
362 export CPP AR NM STRIP OBJCOPY OBJDUMP
363 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
364 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
366 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
367 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
368 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
370 # When compiling out-of-tree modules, put MODVERDIR in the module
371 # tree rather than in the kernel tree. The kernel tree might
373 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
375 # Files to ignore in find ... statements
377 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
378 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn
--exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
380 # ===========================================================================
381 # Rules shared between *config targets and build targets
383 # Basic helpers built in scripts/
384 PHONY
+= scripts_basic
386 $(Q
)$(MAKE
) $(build
)=scripts
/basic
387 $(Q
)rm -f .tmp_quiet_recordmcount
389 # To avoid any implicit rule to kick in, define an empty command.
390 scripts
/basic
/%: scripts_basic
;
392 PHONY
+= outputmakefile
393 # outputmakefile generates a Makefile in the output directory, if using a
394 # separate output directory. This allows convenient use of make in the
397 ifneq ($(KBUILD_SRC
),)
398 $(Q
)ln
-fsn
$(srctree
) source
399 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
400 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
403 # To make sure we do not include .config for any of the *config targets
404 # catch them early, and hand them over to scripts/kconfig/Makefile
405 # It is allowed to specify more targets when calling make, including
406 # mixing *config targets and build targets.
407 # For example 'make oldconfig all'.
408 # Detect when mixed targets is specified, and make a second invocation
409 # of make so .config is not included in this case either (for *config).
411 no-dot-config-targets
:= clean mrproper
distclean \
412 cscope TAGS
tags help
%docs
check% \
413 include/linux
/version.h headers_
% \
414 kernelrelease kernelversion
420 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
421 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
426 ifeq ($(KBUILD_EXTMOD
),)
427 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
429 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
435 ifeq ($(mixed-targets
),1)
436 # ===========================================================================
437 # We're called with mixed targets (*config and build targets).
438 # Handle them one by one.
441 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
444 ifeq ($(config-targets
),1)
445 # ===========================================================================
446 # *config targets only - make sure prerequisites are updated, and descend
447 # in scripts/kconfig to make the *config target
449 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
450 # KBUILD_DEFCONFIG may point out an alternative default configuration
451 # used for 'make defconfig'
452 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
453 export KBUILD_DEFCONFIG KBUILD_KCONFIG
455 config
: scripts_basic outputmakefile FORCE
456 $(Q
)mkdir
-p
include/linux
include/config
457 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
459 %config
: scripts_basic outputmakefile FORCE
460 $(Q
)mkdir
-p
include/linux
include/config
461 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
464 # ===========================================================================
465 # Build targets only - this includes vmlinux, arch specific targets, clean
466 # targets and others. In general all targets except *config targets.
468 ifeq ($(KBUILD_EXTMOD
),)
469 # Additional helpers built in scripts/
470 # Carefully list dependencies so we do not try to build scripts twice
473 scripts
: scripts_basic
include/config
/auto.conf
include/config
/tristate.conf
474 $(Q
)$(MAKE
) $(build
)=$(@
)
476 # Objects we will link into vmlinux / subdirs we need to visit
478 drivers-y
:= drivers
/ sound
/ firmware
/
482 endif # KBUILD_EXTMOD
484 ifeq ($(dot-config
),1)
486 -include include/config
/auto.conf
488 ifeq ($(KBUILD_EXTMOD
),)
489 # Read in dependencies to all Kconfig* files, make sure to run
490 # oldconfig if changes are detected.
491 -include include/config
/auto.conf.cmd
493 # To avoid any implicit rule to kick in, define an empty command
494 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
496 # If .config is newer than include/config/auto.conf, someone tinkered
497 # with it and forgot to run make oldconfig.
498 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
499 # we execute the config step to be sure to catch updated Kconfig files
500 include/config
/%.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
501 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
503 # external modules needs include/generated/autoconf.h and include/config/auto.conf
504 # but do not care if they are up-to-date. Use auto.conf to trigger the test
505 PHONY
+= include/config
/auto.conf
507 include/config
/auto.conf
:
508 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
510 echo
" ERROR: Kernel configuration is invalid."; \
511 echo
" include/generated/autoconf.h or $@ are missing.";\
512 echo
" Run 'make oldconfig && make prepare' on kernel src to fix it."; \
516 endif # KBUILD_EXTMOD
519 # Dummy target needed, because used as prerequisite
520 include/config
/auto.conf
: ;
521 endif # $(dot-config)
523 # The all: target is the default when no target is given on the
525 # This allow a user to issue only 'make' to build a kernel including modules
526 # Defaults vmlinux but it is usually overridden in the arch makefile
529 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
535 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
537 ifneq ($(CONFIG_FRAME_WARN
),0)
538 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
541 # Force gcc to behave correct even for buggy distributions
542 ifndef CONFIG_CC_STACKPROTECTOR
543 KBUILD_CFLAGS
+= $(call cc-option
, -fno-stack-protector
)
546 ifdef CONFIG_FRAME_POINTER
547 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
549 KBUILD_CFLAGS
+= -fomit-frame-pointer
552 ifdef CONFIG_DEBUG_INFO
554 KBUILD_AFLAGS
+= -gdwarf-2
557 ifdef CONFIG_FUNCTION_TRACER
561 # We trigger additional mismatches with less inlining
562 ifdef CONFIG_DEBUG_SECTION_MISMATCH
563 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
566 # arch Makefile may override CC so keep this after arch Makefile is included
567 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
568 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
570 # warn about C99 declaration after statement
571 KBUILD_CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
573 # disable pointer signed / unsigned warnings in gcc 4.0
574 KBUILD_CFLAGS
+= $(call cc-option
,-Wno-pointer-sign
,)
576 # disable invalid "can't wrap" optimizations for signed / pointers
577 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
579 # revert to pre-gcc-4.4 behaviour of .eh_frame
580 KBUILD_CFLAGS
+= $(call cc-option
,-fno-dwarf2-cfi-asm
)
582 # conserve stack if available
583 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
585 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
586 # But warn user when we do so
588 $(warning
"WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
590 ifneq ($(KCPPFLAGS
),)
591 $(call warn-assign
,CPPFLAGS
)
592 KBUILD_CPPFLAGS
+= $(KCPPFLAGS
)
595 $(call warn-assign
,AFLAGS
)
596 KBUILD_AFLAGS
+= $(KAFLAGS
)
599 $(call warn-assign
,CFLAGS
)
600 KBUILD_CFLAGS
+= $(KCFLAGS
)
603 # Use --build-id when available.
604 LDFLAGS_BUILD_ID
= $(patsubst -Wl
$(comma
)%,%,\
605 $(call cc-ldoption
, -Wl
$(comma
)--build-id
,))
606 LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
607 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
609 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
610 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
613 # Default kernel image to build when no specific target is given.
614 # KBUILD_IMAGE may be overruled on the command line or
615 # set in the environment
616 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
618 export KBUILD_IMAGE ?
= vmlinux
621 # INSTALL_PATH specifies where to place the updated kernel and system map
622 # images. Default is /boot, but you can set it to other values
623 export INSTALL_PATH ?
= /boot
626 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
627 # relocations required by build roots. This is not defined in the
628 # makefile but the argument can be passed to make if needed.
631 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
635 # INSTALL_MOD_STRIP, if defined, will cause modules to be
636 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
637 # the default option --strip-debug will be used. Otherwise,
638 # INSTALL_MOD_STRIP will used as the options to the strip command.
640 ifdef INSTALL_MOD_STRIP
641 ifeq ($(INSTALL_MOD_STRIP
),1)
642 mod_strip_cmd
= $(STRIP
) --strip-debug
644 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
645 endif # INSTALL_MOD_STRIP=1
648 endif # INSTALL_MOD_STRIP
652 ifeq ($(KBUILD_EXTMOD
),)
653 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
655 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
656 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
657 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
659 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
661 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
662 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
664 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
665 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
666 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
667 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
668 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
669 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
670 libs-y
:= $(libs-y1
) $(libs-y2
)
673 # ---------------------------------------------------------------------------
674 # vmlinux is built from the objects selected by $(vmlinux-init) and
675 # $(vmlinux-main). Most are built-in.o files from top-level directories
676 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
677 # Ordering when linking is important, and $(vmlinux-init) must be first.
682 # +-< $(vmlinux-init)
683 # | +--< init/version.o + more
685 # +--< $(vmlinux-main)
686 # | +--< driver/built-in.o mm/built-in.o + more
688 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
690 # vmlinux version (uname -v) cannot be updated during normal
691 # descending-into-subdirs phase since we do not yet know if we need to
693 # Therefore this step is delayed until just before final link of vmlinux -
694 # except in the kallsyms case where it is done just before adding the
695 # symbols to the kernel.
697 # System.map is generated to document addresses of all kernel symbols
699 vmlinux-init
:= $(head-y
) $(init-y
)
700 vmlinux-main
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
701 vmlinux-all
:= $(vmlinux-init
) $(vmlinux-main
)
702 vmlinux-lds
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
703 export KBUILD_VMLINUX_OBJS
:= $(vmlinux-all
)
705 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
706 # May be overridden by arch/$(ARCH)/Makefile
707 quiet_cmd_vmlinux__ ?
= LD
$@
708 cmd_vmlinux__ ?
= $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
) -o
$@ \
709 -T
$(vmlinux-lds
) $(vmlinux-init
) \
710 --start-group
$(vmlinux-main
) --end-group \
711 $(filter-out $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) vmlinux.o FORCE
,$^
)
713 # Generate new vmlinux version
714 quiet_cmd_vmlinux_version
= GEN .version
715 cmd_vmlinux_version
= set
-e
; \
716 if
[ ! -r .version
]; then \
720 mv .version .old_version
; \
721 expr
0$$(cat .old_version
) + 1 >.version
; \
723 $(MAKE
) $(build
)=init
725 # Generate System.map
726 quiet_cmd_sysmap
= SYSMAP
727 cmd_sysmap
= $(CONFIG_SHELL
) $(srctree
)/scripts
/mksysmap
730 # If CONFIG_KALLSYMS is set .version is already updated
731 # Generate System.map and verify that the content is consistent
732 # Use + in front of the vmlinux_version rule to silent warning with make -j2
733 # First command is ':' to allow us to use + in front of the rule
734 define rule_vmlinux__
736 $(if
$(CONFIG_KALLSYMS
),,+$(call cmd
,vmlinux_version
))
738 $(call cmd
,vmlinux__
)
739 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
741 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
742 echo
' $($(quiet)cmd_sysmap) System.map' &&) \
743 $(cmd_sysmap
) $@ System.map
; \
744 if
[ $$?
-ne
0 ]; then \
752 ifdef CONFIG_KALLSYMS
753 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
754 # It's a three stage process:
755 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
757 # Running kallsyms on that gives us .tmp_kallsyms1.o with
758 # the right size - vmlinux version (uname -v) is updated during this step
759 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
760 # but due to the added section, some addresses have shifted.
761 # From here, we generate a correct .tmp_kallsyms2.o
762 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
763 # o Verify that the System.map from vmlinux matches the map from
764 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
765 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
766 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
767 # temporary bypass to allow the kernel to be built while the
768 # maintainers work out what went wrong with kallsyms.
770 ifdef CONFIG_KALLSYMS_EXTRA_PASS
776 kallsyms.o
:= .tmp_kallsyms
$(last_kallsyms
).o
778 define verify_kallsyms
779 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
780 echo
' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
781 $(cmd_sysmap
) .tmp_vmlinux
$(last_kallsyms
) .tmp_System.map
782 $(Q
)cmp
-s System.map .tmp_System.map || \
783 (echo Inconsistent kallsyms data
; \
784 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS
; \
785 rm .tmp_kallsyms
* ; /bin
/false
)
788 # Update vmlinux version before link
789 # Use + in front of this rule to silent warning about make -j1
790 # First command is ':' to allow us to use + in front of this rule
791 cmd_ksym_ld
= $(cmd_vmlinux__
)
794 +$(call cmd
,vmlinux_version
)
795 $(call cmd
,vmlinux__
)
796 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
799 # Generate .S file with all kernel symbols
800 quiet_cmd_kallsyms
= KSYM
$@
801 cmd_kallsyms
= $(NM
) -n
$< |
$(KALLSYMS
) \
802 $(if
$(CONFIG_KALLSYMS_ALL
),--all-symbols
) > $@
804 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o
: %.o
: %.S scripts FORCE
805 $(call if_changed_dep
,as_o_S
)
807 .tmp_kallsyms
%.S
: .tmp_vmlinux
% $(KALLSYMS
)
810 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
811 .tmp_vmlinux1
: $(vmlinux-lds
) $(vmlinux-all
) FORCE
812 $(call if_changed_rule
,ksym_ld
)
814 .tmp_vmlinux2
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms1.o FORCE
815 $(call if_changed
,vmlinux__
)
817 .tmp_vmlinux3
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms2.o FORCE
818 $(call if_changed
,vmlinux__
)
820 # Needs to visit scripts/ before $(KALLSYMS) can be used.
821 $(KALLSYMS
): scripts
;
823 # Generate some data for debugging strange kallsyms problems
824 debug_kallsyms
: .tmp_map
$(last_kallsyms
)
826 .tmp_map
%: .tmp_vmlinux
% FORCE
827 ($(OBJDUMP
) -h
$< |
$(AWK
) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM
) $<) |
sort > $@
833 endif # ifdef CONFIG_KALLSYMS
835 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
836 # relevant sections renamed as per the linker script.
837 quiet_cmd_vmlinux-modpost
= LD
$@
838 cmd_vmlinux-modpost
= $(LD
) $(LDFLAGS
) -r
-o
$@ \
839 $(vmlinux-init
) --start-group
$(vmlinux-main
) --end-group \
840 $(filter-out $(vmlinux-init
) $(vmlinux-main
) FORCE
,$^
)
841 define rule_vmlinux-modpost
843 +$(call cmd
,vmlinux-modpost
)
844 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
$@
845 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target
).cmd
848 # vmlinux image - including updated kernel symbols
849 vmlinux
: $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) vmlinux.o
$(kallsyms.o
) FORCE
850 ifdef CONFIG_HEADERS_CHECK
851 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
854 $(Q
)$(MAKE
) $(build
)=samples
856 ifdef CONFIG_BUILD_DOCSRC
857 $(Q
)$(MAKE
) $(build
)=Documentation
859 $(call vmlinux-modpost
)
860 $(call if_changed_rule
,vmlinux__
)
861 $(Q
)rm -f .old_version
863 # build vmlinux.o first to catch section mismatch errors early
864 ifdef CONFIG_KALLSYMS
865 .tmp_vmlinux1
: vmlinux.o
868 modpost-init
:= $(filter-out init
/built-in.o
, $(vmlinux-init
))
869 vmlinux.o
: $(modpost-init
) $(vmlinux-main
) FORCE
870 $(call if_changed_rule
,vmlinux-modpost
)
872 # The actual objects are generated when descending,
873 # make sure no implicit rule kicks in
874 $(sort $(vmlinux-init
) $(vmlinux-main
)) $(vmlinux-lds
): $(vmlinux-dirs
) ;
876 # Handle descending into subdirectories listed in $(vmlinux-dirs)
877 # Preset locale variables to speed up the build process. Limit locale
878 # tweaks to this spot to avoid wrong language settings when running
879 # make menuconfig etc.
880 # Error messages still appears in the original language
882 PHONY
+= $(vmlinux-dirs
)
883 $(vmlinux-dirs
): prepare scripts
884 $(Q
)$(MAKE
) $(build
)=$@
886 $(Q
)$(MAKE
) $(modbuiltin
)=$@
889 # Build the kernel release string
891 # The KERNELRELEASE value built here is stored in the file
892 # include/config/kernel.release, and is used when executing several
893 # make targets, such as "make install" or "make modules_install."
895 # The eventual kernel release string consists of the following fields,
896 # shown in a hierarchical format to show how smaller parts are concatenated
897 # to form the larger and final value, with values coming from places like
898 # the Makefile, kernel config options, make command line options and/or
899 # SCM tag information.
903 # $(PATCHLEVEL) eg, 6
905 # $(EXTRAVERSION) eg, -rc6
908 # localversion* (files without backups, containing '~')
909 # $(CONFIG_LOCALVERSION) (from kernel config setting)
910 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
911 # ./scripts/setlocalversion (SCM tag, if one exists)
912 # $(LOCALVERSION) (from make command line if provided)
914 # Note how the final $(localver-auto) string is included *only* if the
915 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
916 # moment, only git is supported but other SCMs can edit the script
917 # scripts/setlocalversion and add the appropriate checks as needed.
919 pattern
= ".*/localversion[^~]*"
920 string
= $(shell cat
/dev
/null \
921 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
923 localver
= $(subst $(space
),, $(string
) \
924 $(patsubst "%",%,$(CONFIG_LOCALVERSION
)))
926 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
927 # and if the SCM is know a tag from the SCM is appended.
928 # The appended tag is determined by the SCM used.
930 # .scmversion is used when generating rpm packages so we do not loose
931 # the version information from the SCM when we do the build of the kernel
932 # from the copied source
933 ifdef CONFIG_LOCALVERSION_AUTO
935 ifeq ($(wildcard .scmversion
),)
936 _localver-auto
= $(shell $(CONFIG_SHELL
) \
937 $(srctree
)/scripts
/setlocalversion
$(srctree
))
939 _localver-auto
= $(shell cat .scmversion
2> /dev
/null
)
942 localver-auto
= $(LOCALVERSION
)$(_localver-auto
)
945 localver-full
= $(localver
)$(localver-auto
)
947 # Store (new) KERNELRELASE string in include/config/kernel.release
948 kernelrelease
= $(KERNELVERSION
)$(localver-full
)
949 include/config
/kernel.release
: include/config
/auto.conf FORCE
951 $(Q
)echo
$(kernelrelease
) > $@
954 # Things we need to do before we recursively start building the kernel
955 # or the modules are listed in "prepare".
956 # A multi level approach is used. prepareN is processed before prepareN-1.
957 # archprepare is used in arch Makefiles and when processed asm symlink,
958 # version.h and scripts_basic is processed / created.
960 # Listed in dependency order
961 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
963 # prepare3 is used to check if we are building in a separate output directory,
965 # 1) Check that make has not been executed in the kernel src $(srctree)
966 prepare3
: include/config
/kernel.release
967 ifneq ($(KBUILD_SRC
),)
968 @
$(kecho
) ' Using $(srctree) as source for kernel'
969 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
970 echo
" $(srctree) is not clean, please run 'make mrproper'";\
971 echo
" in the '$(srctree)' directory.";\
976 # prepare2 creates a makefile if using a separate output directory
977 prepare2
: prepare3 outputmakefile
979 prepare1
: prepare2
include/linux
/version.h
include/generated
/utsrelease.h \
980 include/config
/auto.conf
983 archprepare
: prepare1 scripts_basic
985 prepare0
: archprepare FORCE
986 $(Q
)$(MAKE
) $(build
)=.
987 $(Q
)$(MAKE
) $(build
)=. missing-syscalls
989 # All the preparing..
992 # Generate some files
993 # ---------------------------------------------------------------------------
995 # KERNELRELEASE can change from a few different places, meaning version.h
996 # needs to be updated, so this check is forced on all builds
999 define filechk_utsrelease.h
1000 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
1001 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1004 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1007 define filechk_version.h
1008 (echo \
#define LINUX_VERSION_CODE $(shell \
1009 expr
$(VERSION
) \
* 65536 + $(PATCHLEVEL
) \
* 256 + $(SUBLEVEL
)); \
1010 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1013 include/linux
/version.h
: $(srctree
)/Makefile FORCE
1014 $(call filechk
,version.h
)
1016 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
1017 $(call filechk
,utsrelease.h
)
1021 $(Q
)find
include/ -name
'*.h' | xargs
--max-args
1 scripts
/headerdep.pl
1023 # ---------------------------------------------------------------------------
1027 @echo
'*** Warning: make $@ is unnecessary now.'
1029 # ---------------------------------------------------------------------------
1031 INSTALL_FW_PATH
=$(INSTALL_MOD_PATH
)/lib
/firmware
1032 export INSTALL_FW_PATH
1034 PHONY
+= firmware_install
1035 firmware_install
: FORCE
1036 @mkdir
-p
$(objtree
)/firmware
1037 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_install
1039 # ---------------------------------------------------------------------------
1042 #Default location for installed headers
1043 export INSTALL_HDR_PATH
= $(objtree
)/usr
1045 hdr-inst
:= -rR
-f
$(srctree
)/scripts
/Makefile.headersinst obj
1047 # If we do an all arch process set dst to asm-$(hdr-arch)
1048 hdr-dst
= $(if
$(KBUILD_HEADERS
), dst
=include/asm-
$(hdr-arch
), dst
=include/asm
)
1051 __headers
: include/linux
/version.h scripts_basic FORCE
1052 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
1054 PHONY
+= headers_install_all
1055 headers_install_all
:
1056 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
install
1058 PHONY
+= headers_install
1059 headers_install
: __headers
1060 $(if
$(wildcard $(srctree
)/arch
/$(hdr-arch
)/include/asm
/Kbuild
),, \
1061 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
1062 $(Q
)$(MAKE
) $(hdr-inst
)=include
1063 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/asm
$(hdr-dst
)
1065 PHONY
+= headers_check_all
1066 headers_check_all
: headers_install_all
1067 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
check
1069 PHONY
+= headers_check
1070 headers_check
: headers_install
1071 $(Q
)$(MAKE
) $(hdr-inst
)=include HDRCHECK
=1
1072 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/asm
$(hdr-dst
) HDRCHECK
=1
1074 # ---------------------------------------------------------------------------
1077 ifdef CONFIG_MODULES
1079 # By default, build modules as well
1085 # A module can be listed more than once in obj-m resulting in
1086 # duplicate lines in modules.order files. Those are removed
1087 # using awk while concatenating to the final file.
1090 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
)
1091 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.order
) > $(objtree
)/modules.order
1092 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.builtin
) > $(objtree
)/modules.builtin
1093 @
$(kecho
) ' Building modules, stage 2.';
1094 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1095 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modbuild
1098 # Target to prepare building external modules
1099 PHONY
+= modules_prepare
1100 modules_prepare
: prepare scripts
1102 # Target to install modules
1103 PHONY
+= modules_install
1104 modules_install
: _modinst_ _modinst_post
1108 @if
[ -z
"`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1109 echo
"Warning: you may need to install module-init-tools"; \
1110 echo
"See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1113 @
rm -rf
$(MODLIB
)/kernel
1114 @
rm -f
$(MODLIB
)/source
1115 @mkdir
-p
$(MODLIB
)/kernel
1116 @ln
-s
$(srctree
) $(MODLIB
)/source
1117 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1118 rm -f
$(MODLIB
)/build
; \
1119 ln
-s
$(objtree
) $(MODLIB
)/build
; \
1121 @cp
-f
$(objtree
)/modules.order
$(MODLIB
)/
1122 @cp
-f
$(objtree
)/modules.builtin
$(MODLIB
)/
1123 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1125 # This depmod is only for convenience to give the initial
1126 # boot a modules.dep even before / is mounted read-write. However the
1127 # boot script depmod is the master version.
1128 PHONY
+= _modinst_post
1129 _modinst_post
: _modinst_
1130 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modinst
1133 else # CONFIG_MODULES
1135 # Modules not configured
1136 # ---------------------------------------------------------------------------
1138 modules modules_install
: FORCE
1140 @echo
"The present kernel configuration has modules disabled."
1141 @echo
"Type 'make config' and enable loadable module support."
1142 @echo
"Then build a kernel with module support enabled."
1146 endif # CONFIG_MODULES
1149 # Cleaning is done on three levels.
1150 # make clean Delete most generated files
1151 # Leave enough to build external modules
1152 # make mrproper Delete the current configuration, and all generated files
1153 # make distclean Remove editor backup files, patch leftover files and the like
1155 # Directories & files removed with 'make clean'
1156 CLEAN_DIRS
+= $(MODVERDIR
)
1157 CLEAN_FILES
+= vmlinux System.map \
1158 .tmp_kallsyms
* .tmp_version .tmp_vmlinux
* .tmp_System.map
1160 # Directories & files removed with 'make mrproper'
1161 MRPROPER_DIRS
+= include/config usr
/include include/generated
1162 MRPROPER_FILES
+= .config .config.old .version .old_version \
1163 include/linux
/version.h \
1164 Module.symvers
tags TAGS cscope
*
1166 # clean - Delete most, but leave enough to build external modules
1168 clean: rm-dirs
:= $(CLEAN_DIRS
)
1169 clean: rm-files
:= $(CLEAN_FILES
)
1170 clean-dirs
:= $(addprefix _clean_
,$(srctree
) $(vmlinux-alldirs
) Documentation
)
1172 PHONY
+= $(clean-dirs
) clean archclean
1174 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1176 clean: archclean
$(clean-dirs
)
1179 @find .
$(RCS_FIND_IGNORE
) \
1180 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1181 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1182 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1183 -o
-name modules.builtin
-o
-name
'.tmp_*.o.*' \
1184 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1186 # mrproper - Delete all generated files, including .config
1188 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1189 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1190 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
1192 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1194 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1196 mrproper
: clean archmrproper
$(mrproper-dirs
)
1205 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1206 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1207 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1208 -o
-name
'.*.rej' -o
-size
0 \
1209 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
1210 -type f
-print | xargs
rm -f
1213 # Packaging of the kernel to various formats
1214 # ---------------------------------------------------------------------------
1215 # rpm target kept for backward compatibility
1216 package-dir
:= $(srctree
)/scripts
/package
1218 %pkg
: include/config
/kernel.release FORCE
1219 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1220 rpm
: include/config
/kernel.release FORCE
1221 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1224 # Brief documentation of the typical targets used
1225 # ---------------------------------------------------------------------------
1227 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1228 boards
:= $(notdir $(boards
))
1229 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1230 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1233 @echo
'Cleaning targets:'
1234 @echo
' clean - Remove most generated files but keep the config and'
1235 @echo
' enough build support to build external modules'
1236 @echo
' mrproper - Remove all generated files + config + various backup files'
1237 @echo
' distclean - mrproper + remove editor backup and patch files'
1239 @echo
'Configuration targets:'
1240 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1242 @echo
'Other generic targets:'
1243 @echo
' all - Build all targets marked with [*]'
1244 @echo
'* vmlinux - Build the bare kernel'
1245 @echo
'* modules - Build all modules'
1246 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1247 @echo
' firmware_install- Install all firmware to INSTALL_FW_PATH'
1248 @echo
' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1249 @echo
' dir/ - Build all files in dir and below'
1250 @echo
' dir/file.[ois] - Build specified target only'
1251 @echo
' dir/file.ko - Build module including final link'
1252 @echo
' modules_prepare - Set up for building external modules'
1253 @echo
' tags/TAGS - Generate tags file for editors'
1254 @echo
' cscope - Generate cscope index'
1255 @echo
' kernelrelease - Output the release version string'
1256 @echo
' kernelversion - Output the version stored in Makefile'
1257 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1258 echo
' (default: $(INSTALL_HDR_PATH))'; \
1260 @echo
'Static analysers'
1261 @echo
' checkstack - Generate a list of stack hogs'
1262 @echo
' namespacecheck - Name space analysis on compiled kernel'
1263 @echo
' versioncheck - Sanity check on version.h usage'
1264 @echo
' includecheck - Check for duplicate included header files'
1265 @echo
' export_report - List the usages of all exported symbols'
1266 @echo
' headers_check - Sanity check on exported headers'
1267 @echo
' headerdep - Detect inclusion cycles in headers'; \
1269 @echo
'Kernel packaging:'
1270 @
$(MAKE
) $(build
)=$(package-dir
) help
1272 @echo
'Documentation targets:'
1273 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1275 @echo
'Architecture specific targets ($(SRCARCH)):'
1276 @
$(if
$(archhelp
),$(archhelp
),\
1277 echo
' No architecture specific help defined for $(SRCARCH)')
1280 $(foreach b
, $(boards
), \
1281 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1283 @
$(if
$(board-dirs
), \
1284 $(foreach b
, $(board-dirs
), \
1285 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1286 printf
" %-16s - Show all of the above\\n" help-boards
; \
1289 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1290 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1291 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1292 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1293 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1295 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1296 @echo
'For further info see the ./README file'
1299 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1301 help-boards
: $(help-board-dirs
)
1303 boards-per-dir
= $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
))
1305 $(help-board-dirs
): help-
%:
1306 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1307 @
$(if
$(boards-per-dir
), \
1308 $(foreach b
, $(boards-per-dir
), \
1309 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1313 # Documentation targets
1314 # ---------------------------------------------------------------------------
1315 %docs
: scripts_basic FORCE
1316 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1318 else # KBUILD_EXTMOD
1321 # External module support.
1322 # When building external modules the kernel used as basis is considered
1323 # read-only, and no consistency checks are made and the make
1324 # system is not used on the basis kernel. If updates are required
1325 # in the basis kernel ordinary make commands (without M=...) must
1328 # The following are the only valid targets when building external
1330 # make M=dir clean Delete all automatically generated files
1331 # make M=dir modules Make all modules in specified dir
1332 # make M=dir Same as 'make M=dir modules'
1333 # make M=dir modules_install
1334 # Install the modules built in the module directory
1335 # Assumes install directory is already created
1337 # We are always building modules
1339 PHONY
+= crmodverdir
1343 PHONY
+= $(objtree
)/Module.symvers
1344 $(objtree
)/Module.symvers
:
1345 @
test -e
$(objtree
)/Module.symvers ||
( \
1347 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1348 echo
" is missing; modules will have no dependencies and modversions."; \
1351 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1352 PHONY
+= $(module-dirs
) modules
1353 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1354 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1356 modules
: $(module-dirs
)
1357 @
$(kecho
) ' Building modules, stage 2.';
1358 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1360 PHONY
+= modules_install
1361 modules_install
: _emodinst_ _emodinst_post
1363 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1366 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1367 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1369 PHONY
+= _emodinst_post
1370 _emodinst_post
: _emodinst_
1373 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1375 PHONY
+= $(clean-dirs
) clean
1377 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1379 clean: rm-dirs
:= $(MODVERDIR
)
1380 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers \
1381 $(KBUILD_EXTMOD
)/modules.order \
1382 $(KBUILD_EXTMOD
)/modules.builtin
1383 clean: $(clean-dirs
)
1386 @find
$(KBUILD_EXTMOD
) $(RCS_FIND_IGNORE
) \
1387 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1388 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1389 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1392 @echo
' Building external modules.'
1393 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1395 @echo
' modules - default target, build the module(s)'
1396 @echo
' modules_install - install the module'
1397 @echo
' clean - remove generated files in module directory only'
1401 PHONY
+= prepare scripts
1404 endif # KBUILD_EXTMOD
1406 # Generate tags for editors
1407 # ---------------------------------------------------------------------------
1408 quiet_cmd_tags
= GEN
$@
1409 cmd_tags
= $(CONFIG_SHELL
) $(srctree
)/scripts
/tags.sh
$@
1411 tags TAGS cscope
: FORCE
1414 # Scripts to check various things for consistency
1415 # ---------------------------------------------------------------------------
1418 find
* $(RCS_FIND_IGNORE
) \
1419 -name
'*.[hcS]' -type f
-print |
sort \
1420 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1423 find
* $(RCS_FIND_IGNORE
) \
1424 -name
'*.[hcS]' -type f
-print |
sort \
1425 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1428 $(PERL
) $(srctree
)/scripts
/namespace.pl
1431 $(PERL
) $(srctree
)/scripts
/export_report.pl
1433 endif #ifeq ($(config-targets),1)
1434 endif #ifeq ($(mixed-targets),1)
1436 PHONY
+= checkstack kernelrelease kernelversion
1438 # UML needs a little special treatment here. It wants to use the host
1439 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1440 # else wants $(ARCH), including people doing cross-builds, which means
1441 # that $(SUBARCH) doesn't work here.
1443 CHECKSTACK_ARCH
:= $(SUBARCH
)
1445 CHECKSTACK_ARCH
:= $(ARCH
)
1448 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1449 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1452 $(if
$(wildcard include/config
/kernel.release
), $(Q
)echo
$(KERNELRELEASE
), \
1453 $(error kernelrelease not valid
- run
'make prepare' to update it
))
1455 @echo
$(KERNELVERSION
)
1458 # ---------------------------------------------------------------------------
1459 # Single targets are compatible with:
1460 # - build with mixed source and output
1461 # - build with separate output dir 'make O=...'
1462 # - external modules
1464 # target-dir => where to store outputfile
1465 # build-dir => directory in kernel source tree to use
1467 ifeq ($(KBUILD_EXTMOD
),)
1468 build-dir
= $(patsubst %/,%,$(dir $@
))
1469 target-dir
= $(dir $@
)
1471 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1472 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1473 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1476 %.s
: %.c prepare scripts FORCE
1477 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1478 %.i
: %.c prepare scripts FORCE
1479 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1480 %.o
: %.c prepare scripts FORCE
1481 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1482 %.lst
: %.c prepare scripts FORCE
1483 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1484 %.s
: %.S prepare scripts FORCE
1485 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1486 %.o
: %.S prepare scripts FORCE
1487 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1488 %.symtypes
: %.c prepare scripts FORCE
1489 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1492 /: prepare scripts FORCE
1494 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1495 $(build
)=$(build-dir
)
1496 %/: prepare scripts FORCE
1498 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1499 $(build
)=$(build-dir
)
1500 %.ko
: prepare scripts FORCE
1502 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1503 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1504 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1506 # FIXME Should go into a make.lib or something
1507 # ===========================================================================
1509 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1510 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1512 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1513 cmd_rmfiles
= rm -f
$(rm-files
)
1515 # Run depmod only if we have System.map and depmod is executable
1516 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1518 if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then \
1519 $(DEPMOD
) -ae
-F System.map \
1520 $(if
$(strip $(INSTALL_MOD_PATH
)), -b
$(INSTALL_MOD_PATH
) ) \
1524 # Create temporary dir for module support files
1525 # clean it up only when building all modules
1526 cmd_crmodverdir
= $(Q
)mkdir
-p
$(MODVERDIR
) \
1527 $(if
$(KBUILD_MODULES
),; rm -f
$(MODVERDIR
)/*)
1529 a_flags
= -Wp
,-MD
,$(depfile
) $(KBUILD_AFLAGS
) $(AFLAGS_KERNEL
) \
1530 $(NOSTDINC_FLAGS
) $(LINUXINCLUDE
) $(KBUILD_CPPFLAGS
) \
1531 $(modkern_aflags
) $(EXTRA_AFLAGS
) $(AFLAGS_
$(basetarget
).o
)
1533 quiet_cmd_as_o_S
= AS
$@
1534 cmd_as_o_S
= $(CC
) $(a_flags
) -c
-o
$@
$<
1536 # read all saved command lines
1538 targets
:= $(wildcard $(sort $(targets
)))
1539 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1541 ifneq ($(cmd_files
),)
1542 $(cmd_files
): ; # Do not try to update included dependency files
1543 include $(cmd_files
)
1546 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1548 # $(Q)$(MAKE) $(clean)=dir
1549 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1551 endif # skip-makefile
1556 # Declare the contents of the .PHONY variable as phony. We keep that
1557 # information in a variable so we can use it in if_changed and friends.