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 # A third alternative is to store a setting in .config so that plain
187 # "make" in the configured kernel build directory always uses that.
188 # Default value for CROSS_COMPILE is not to prefix executables
189 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
190 export KBUILD_BUILDHOST
:= $(SUBARCH
)
193 CROSS_COMPILE ?
= $(CONFIG_CROSS_COMPILE
:"%"=%)
195 # Architecture as present in compile.h
196 UTS_MACHINE
:= $(ARCH
)
199 # Additional ARCH settings for x86
203 ifeq ($(ARCH
),x86_64
)
207 # Additional ARCH settings for sparc
208 ifeq ($(ARCH
),sparc64
)
212 # Additional ARCH settings for sh
217 # Where to locate arch specific headers
218 hdr-arch
:= $(SRCARCH
)
220 ifeq ($(ARCH
),m68knommu
)
224 KCONFIG_CONFIG ?
= .config
226 # SHELL used by kbuild
227 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
228 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
229 else echo sh
; fi
; fi
)
233 HOSTCFLAGS
= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2
-fomit-frame-pointer
236 # Decide whether to build built-in, modular, or both.
237 # Normally, just do built-in.
242 # If we have only "make modules", don't compile built-in objects.
243 # When we're building modules with modversions, we need to consider
244 # the built-in objects during the descend as well, in order to
245 # make sure the checksums are up to date before we record them.
247 ifeq ($(MAKECMDGOALS
),modules
)
248 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
251 # If we have "make <whatever> modules", compile modules
252 # in addition to whatever we do anyway.
253 # Just "make" or "make all" shall build modules as well
255 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
259 ifeq ($(MAKECMDGOALS
),)
263 export KBUILD_MODULES KBUILD_BUILTIN
264 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
267 # ---------------------------------------------------------------------------
269 # Normally, we echo the whole command before executing it. By making
270 # that echo $($(quiet)$(cmd)), we now have the possibility to set
271 # $(quiet) to choose other forms of output instead, e.g.
273 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
274 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
276 # If $(quiet) is empty, the whole command will be printed.
277 # If it is set to "quiet_", only the short version will be printed.
278 # If it is set to "silent_", nothing will be printed at all, since
279 # the variable $(silent_cmd_cc_o_c) doesn't exist.
281 # A simple variant is to prefix commands with $(Q) - that's useful
282 # for commands that shall be hidden in non-verbose mode.
286 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
287 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
289 ifeq ($(KBUILD_VERBOSE
),1)
297 # If the user is running make -s (silent mode), suppress echoing of
300 ifneq ($(findstring s
,$(MAKEFLAGS
)),)
304 export quiet Q KBUILD_VERBOSE
307 # Look for make include files relative to root of kernel src
308 MAKEFLAGS
+= --include-dir
=$(srctree
)
310 # We need some generic definitions (do not try to remake the file).
311 $(srctree
)/scripts
/Kbuild.
include: ;
312 include $(srctree
)/scripts
/Kbuild.
include
314 # Make variables (CC, etc...)
316 AS
= $(CROSS_COMPILE
)as
317 LD
= $(CROSS_COMPILE
)ld
318 CC
= $(CROSS_COMPILE
)gcc
320 AR
= $(CROSS_COMPILE
)ar
321 NM
= $(CROSS_COMPILE
)nm
322 STRIP
= $(CROSS_COMPILE
)strip
323 OBJCOPY
= $(CROSS_COMPILE
)objcopy
324 OBJDUMP
= $(CROSS_COMPILE
)objdump
326 GENKSYMS
= scripts
/genksyms
/genksyms
327 INSTALLKERNEL
:= installkernel
328 DEPMOD
= /sbin
/depmod
329 KALLSYMS
= scripts
/kallsyms
333 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
334 -Wbitwise
-Wno-return-void
$(CF
)
336 CFLAGS_MODULE
= $(MODFLAGS
)
337 AFLAGS_MODULE
= $(MODFLAGS
)
338 LDFLAGS_MODULE
= -T
$(srctree
)/scripts
/module-common.lds
341 CFLAGS_GCOV
= -fprofile-arcs
-ftest-coverage
344 # Use LINUXINCLUDE when you must reference the include/ directory.
345 # Needed to be compatible with the O= option
346 LINUXINCLUDE
:= -I
$(srctree
)/arch
/$(hdr-arch
)/include -Iinclude \
347 $(if
$(KBUILD_SRC
), -I
$(srctree
)/include) \
348 -include include/generated
/autoconf.h
350 KBUILD_CPPFLAGS
:= -D__KERNEL__
352 KBUILD_CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
353 -fno-strict-aliasing
-fno-common \
354 -Werror-implicit-function-declaration \
355 -Wno-format-security \
356 -fno-delete-null-pointer-checks
357 KBUILD_AFLAGS
:= -D__ASSEMBLY__
359 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
360 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
361 KERNELVERSION
= $(VERSION
).
$(PATCHLEVEL
).
$(SUBLEVEL
)$(EXTRAVERSION
)
363 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
364 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
365 export CPP AR NM STRIP OBJCOPY OBJDUMP
366 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
367 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
369 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
370 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
371 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
373 # When compiling out-of-tree modules, put MODVERDIR in the module
374 # tree rather than in the kernel tree. The kernel tree might
376 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
378 # Files to ignore in find ... statements
380 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
381 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn
--exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
383 # ===========================================================================
384 # Rules shared between *config targets and build targets
386 # Basic helpers built in scripts/
387 PHONY
+= scripts_basic
389 $(Q
)$(MAKE
) $(build
)=scripts
/basic
390 $(Q
)rm -f .tmp_quiet_recordmcount
392 # To avoid any implicit rule to kick in, define an empty command.
393 scripts
/basic
/%: scripts_basic
;
395 PHONY
+= outputmakefile
396 # outputmakefile generates a Makefile in the output directory, if using a
397 # separate output directory. This allows convenient use of make in the
400 ifneq ($(KBUILD_SRC
),)
401 $(Q
)ln
-fsn
$(srctree
) source
402 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
403 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
406 # To make sure we do not include .config for any of the *config targets
407 # catch them early, and hand them over to scripts/kconfig/Makefile
408 # It is allowed to specify more targets when calling make, including
409 # mixing *config targets and build targets.
410 # For example 'make oldconfig all'.
411 # Detect when mixed targets is specified, and make a second invocation
412 # of make so .config is not included in this case either (for *config).
414 no-dot-config-targets
:= clean mrproper
distclean \
415 cscope TAGS
tags help
%docs
check% \
416 include/linux
/version.h headers_
% \
417 kernelrelease kernelversion
423 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
424 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
429 ifeq ($(KBUILD_EXTMOD
),)
430 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
432 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
438 ifeq ($(mixed-targets
),1)
439 # ===========================================================================
440 # We're called with mixed targets (*config and build targets).
441 # Handle them one by one.
444 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
447 ifeq ($(config-targets
),1)
448 # ===========================================================================
449 # *config targets only - make sure prerequisites are updated, and descend
450 # in scripts/kconfig to make the *config target
452 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
453 # KBUILD_DEFCONFIG may point out an alternative default configuration
454 # used for 'make defconfig'
455 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
456 export KBUILD_DEFCONFIG KBUILD_KCONFIG
458 config
: scripts_basic outputmakefile FORCE
459 $(Q
)mkdir
-p
include/linux
include/config
460 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
462 %config
: scripts_basic outputmakefile FORCE
463 $(Q
)mkdir
-p
include/linux
include/config
464 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
467 # ===========================================================================
468 # Build targets only - this includes vmlinux, arch specific targets, clean
469 # targets and others. In general all targets except *config targets.
471 ifeq ($(KBUILD_EXTMOD
),)
472 # Additional helpers built in scripts/
473 # Carefully list dependencies so we do not try to build scripts twice
476 scripts
: scripts_basic
include/config
/auto.conf
include/config
/tristate.conf
477 $(Q
)$(MAKE
) $(build
)=$(@
)
479 # Objects we will link into vmlinux / subdirs we need to visit
481 drivers-y
:= drivers
/ sound
/ firmware
/
485 endif # KBUILD_EXTMOD
487 ifeq ($(dot-config
),1)
489 -include include/config
/auto.conf
491 ifeq ($(KBUILD_EXTMOD
),)
492 # Read in dependencies to all Kconfig* files, make sure to run
493 # oldconfig if changes are detected.
494 -include include/config
/auto.conf.cmd
496 # To avoid any implicit rule to kick in, define an empty command
497 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
499 # If .config is newer than include/config/auto.conf, someone tinkered
500 # with it and forgot to run make oldconfig.
501 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
502 # we execute the config step to be sure to catch updated Kconfig files
503 include/config
/%.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
504 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
506 # external modules needs include/generated/autoconf.h and include/config/auto.conf
507 # but do not care if they are up-to-date. Use auto.conf to trigger the test
508 PHONY
+= include/config
/auto.conf
510 include/config
/auto.conf
:
511 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
513 echo
" ERROR: Kernel configuration is invalid."; \
514 echo
" include/generated/autoconf.h or $@ are missing.";\
515 echo
" Run 'make oldconfig && make prepare' on kernel src to fix it."; \
519 endif # KBUILD_EXTMOD
522 # Dummy target needed, because used as prerequisite
523 include/config
/auto.conf
: ;
524 endif # $(dot-config)
526 # The all: target is the default when no target is given on the
528 # This allow a user to issue only 'make' to build a kernel including modules
529 # Defaults vmlinux but it is usually overridden in the arch makefile
532 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
538 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
540 ifneq ($(CONFIG_FRAME_WARN
),0)
541 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
544 # Force gcc to behave correct even for buggy distributions
545 ifndef CONFIG_CC_STACKPROTECTOR
546 KBUILD_CFLAGS
+= $(call cc-option
, -fno-stack-protector
)
549 ifdef CONFIG_FRAME_POINTER
550 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
552 KBUILD_CFLAGS
+= -fomit-frame-pointer
555 ifdef CONFIG_DEBUG_INFO
557 KBUILD_AFLAGS
+= -gdwarf-2
560 ifdef CONFIG_FUNCTION_TRACER
564 # We trigger additional mismatches with less inlining
565 ifdef CONFIG_DEBUG_SECTION_MISMATCH
566 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
569 # arch Makefile may override CC so keep this after arch Makefile is included
570 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
571 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
573 # warn about C99 declaration after statement
574 KBUILD_CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
576 # disable pointer signed / unsigned warnings in gcc 4.0
577 KBUILD_CFLAGS
+= $(call cc-option
,-Wno-pointer-sign
,)
579 # disable invalid "can't wrap" optimizations for signed / pointers
580 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
582 # revert to pre-gcc-4.4 behaviour of .eh_frame
583 KBUILD_CFLAGS
+= $(call cc-option
,-fno-dwarf2-cfi-asm
)
585 # conserve stack if available
586 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
588 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
589 # But warn user when we do so
591 $(warning
"WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
593 ifneq ($(KCPPFLAGS
),)
594 $(call warn-assign
,CPPFLAGS
)
595 KBUILD_CPPFLAGS
+= $(KCPPFLAGS
)
598 $(call warn-assign
,AFLAGS
)
599 KBUILD_AFLAGS
+= $(KAFLAGS
)
602 $(call warn-assign
,CFLAGS
)
603 KBUILD_CFLAGS
+= $(KCFLAGS
)
606 # Use --build-id when available.
607 LDFLAGS_BUILD_ID
= $(patsubst -Wl
$(comma
)%,%,\
608 $(call cc-ldoption
, -Wl
$(comma
)--build-id
,))
609 LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
610 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
612 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
613 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
616 # Default kernel image to build when no specific target is given.
617 # KBUILD_IMAGE may be overruled on the command line or
618 # set in the environment
619 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
621 export KBUILD_IMAGE ?
= vmlinux
624 # INSTALL_PATH specifies where to place the updated kernel and system map
625 # images. Default is /boot, but you can set it to other values
626 export INSTALL_PATH ?
= /boot
629 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
630 # relocations required by build roots. This is not defined in the
631 # makefile but the argument can be passed to make if needed.
634 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
638 # INSTALL_MOD_STRIP, if defined, will cause modules to be
639 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
640 # the default option --strip-debug will be used. Otherwise,
641 # INSTALL_MOD_STRIP will used as the options to the strip command.
643 ifdef INSTALL_MOD_STRIP
644 ifeq ($(INSTALL_MOD_STRIP
),1)
645 mod_strip_cmd
= $(STRIP
) --strip-debug
647 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
648 endif # INSTALL_MOD_STRIP=1
651 endif # INSTALL_MOD_STRIP
655 ifeq ($(KBUILD_EXTMOD
),)
656 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
658 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
659 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
660 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
662 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
664 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
665 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
667 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
668 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
669 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
670 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
671 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
672 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
673 libs-y
:= $(libs-y1
) $(libs-y2
)
676 # ---------------------------------------------------------------------------
677 # vmlinux is built from the objects selected by $(vmlinux-init) and
678 # $(vmlinux-main). Most are built-in.o files from top-level directories
679 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
680 # Ordering when linking is important, and $(vmlinux-init) must be first.
685 # +-< $(vmlinux-init)
686 # | +--< init/version.o + more
688 # +--< $(vmlinux-main)
689 # | +--< driver/built-in.o mm/built-in.o + more
691 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
693 # vmlinux version (uname -v) cannot be updated during normal
694 # descending-into-subdirs phase since we do not yet know if we need to
696 # Therefore this step is delayed until just before final link of vmlinux -
697 # except in the kallsyms case where it is done just before adding the
698 # symbols to the kernel.
700 # System.map is generated to document addresses of all kernel symbols
702 vmlinux-init
:= $(head-y
) $(init-y
)
703 vmlinux-main
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
704 vmlinux-all
:= $(vmlinux-init
) $(vmlinux-main
)
705 vmlinux-lds
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
706 export KBUILD_VMLINUX_OBJS
:= $(vmlinux-all
)
708 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
709 # May be overridden by arch/$(ARCH)/Makefile
710 quiet_cmd_vmlinux__ ?
= LD
$@
711 cmd_vmlinux__ ?
= $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
) -o
$@ \
712 -T
$(vmlinux-lds
) $(vmlinux-init
) \
713 --start-group
$(vmlinux-main
) --end-group \
714 $(filter-out $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) vmlinux.o FORCE
,$^
)
716 # Generate new vmlinux version
717 quiet_cmd_vmlinux_version
= GEN .version
718 cmd_vmlinux_version
= set
-e
; \
719 if
[ ! -r .version
]; then \
723 mv .version .old_version
; \
724 expr
0$$(cat .old_version
) + 1 >.version
; \
726 $(MAKE
) $(build
)=init
728 # Generate System.map
729 quiet_cmd_sysmap
= SYSMAP
730 cmd_sysmap
= $(CONFIG_SHELL
) $(srctree
)/scripts
/mksysmap
733 # If CONFIG_KALLSYMS is set .version is already updated
734 # Generate System.map and verify that the content is consistent
735 # Use + in front of the vmlinux_version rule to silent warning with make -j2
736 # First command is ':' to allow us to use + in front of the rule
737 define rule_vmlinux__
739 $(if
$(CONFIG_KALLSYMS
),,+$(call cmd
,vmlinux_version
))
741 $(call cmd
,vmlinux__
)
742 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
744 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
745 echo
' $($(quiet)cmd_sysmap) System.map' &&) \
746 $(cmd_sysmap
) $@ System.map
; \
747 if
[ $$?
-ne
0 ]; then \
755 ifdef CONFIG_KALLSYMS
756 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
757 # It's a three stage process:
758 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
760 # Running kallsyms on that gives us .tmp_kallsyms1.o with
761 # the right size - vmlinux version (uname -v) is updated during this step
762 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
763 # but due to the added section, some addresses have shifted.
764 # From here, we generate a correct .tmp_kallsyms2.o
765 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
766 # o Verify that the System.map from vmlinux matches the map from
767 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
768 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
769 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
770 # temporary bypass to allow the kernel to be built while the
771 # maintainers work out what went wrong with kallsyms.
773 ifdef CONFIG_KALLSYMS_EXTRA_PASS
779 kallsyms.o
:= .tmp_kallsyms
$(last_kallsyms
).o
781 define verify_kallsyms
782 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
783 echo
' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
784 $(cmd_sysmap
) .tmp_vmlinux
$(last_kallsyms
) .tmp_System.map
785 $(Q
)cmp
-s System.map .tmp_System.map || \
786 (echo Inconsistent kallsyms data
; \
787 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS
; \
788 rm .tmp_kallsyms
* ; /bin
/false
)
791 # Update vmlinux version before link
792 # Use + in front of this rule to silent warning about make -j1
793 # First command is ':' to allow us to use + in front of this rule
794 cmd_ksym_ld
= $(cmd_vmlinux__
)
797 +$(call cmd
,vmlinux_version
)
798 $(call cmd
,vmlinux__
)
799 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
802 # Generate .S file with all kernel symbols
803 quiet_cmd_kallsyms
= KSYM
$@
804 cmd_kallsyms
= $(NM
) -n
$< |
$(KALLSYMS
) \
805 $(if
$(CONFIG_KALLSYMS_ALL
),--all-symbols
) > $@
807 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o
: %.o
: %.S scripts FORCE
808 $(call if_changed_dep
,as_o_S
)
810 .tmp_kallsyms
%.S
: .tmp_vmlinux
% $(KALLSYMS
)
813 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
814 .tmp_vmlinux1
: $(vmlinux-lds
) $(vmlinux-all
) FORCE
815 $(call if_changed_rule
,ksym_ld
)
817 .tmp_vmlinux2
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms1.o FORCE
818 $(call if_changed
,vmlinux__
)
820 .tmp_vmlinux3
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms2.o FORCE
821 $(call if_changed
,vmlinux__
)
823 # Needs to visit scripts/ before $(KALLSYMS) can be used.
824 $(KALLSYMS
): scripts
;
826 # Generate some data for debugging strange kallsyms problems
827 debug_kallsyms
: .tmp_map
$(last_kallsyms
)
829 .tmp_map
%: .tmp_vmlinux
% FORCE
830 ($(OBJDUMP
) -h
$< |
$(AWK
) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM
) $<) |
sort > $@
836 endif # ifdef CONFIG_KALLSYMS
838 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
839 # relevant sections renamed as per the linker script.
840 quiet_cmd_vmlinux-modpost
= LD
$@
841 cmd_vmlinux-modpost
= $(LD
) $(LDFLAGS
) -r
-o
$@ \
842 $(vmlinux-init
) --start-group
$(vmlinux-main
) --end-group \
843 $(filter-out $(vmlinux-init
) $(vmlinux-main
) FORCE
,$^
)
844 define rule_vmlinux-modpost
846 +$(call cmd
,vmlinux-modpost
)
847 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
$@
848 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target
).cmd
851 # vmlinux image - including updated kernel symbols
852 vmlinux
: $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) vmlinux.o
$(kallsyms.o
) FORCE
853 ifdef CONFIG_HEADERS_CHECK
854 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
857 $(Q
)$(MAKE
) $(build
)=samples
859 ifdef CONFIG_BUILD_DOCSRC
860 $(Q
)$(MAKE
) $(build
)=Documentation
862 $(call vmlinux-modpost
)
863 $(call if_changed_rule
,vmlinux__
)
864 $(Q
)rm -f .old_version
866 # build vmlinux.o first to catch section mismatch errors early
867 ifdef CONFIG_KALLSYMS
868 .tmp_vmlinux1
: vmlinux.o
871 modpost-init
:= $(filter-out init
/built-in.o
, $(vmlinux-init
))
872 vmlinux.o
: $(modpost-init
) $(vmlinux-main
) FORCE
873 $(call if_changed_rule
,vmlinux-modpost
)
875 # The actual objects are generated when descending,
876 # make sure no implicit rule kicks in
877 $(sort $(vmlinux-init
) $(vmlinux-main
)) $(vmlinux-lds
): $(vmlinux-dirs
) ;
879 # Handle descending into subdirectories listed in $(vmlinux-dirs)
880 # Preset locale variables to speed up the build process. Limit locale
881 # tweaks to this spot to avoid wrong language settings when running
882 # make menuconfig etc.
883 # Error messages still appears in the original language
885 PHONY
+= $(vmlinux-dirs
)
886 $(vmlinux-dirs
): prepare scripts
887 $(Q
)$(MAKE
) $(build
)=$@
889 $(Q
)$(MAKE
) $(modbuiltin
)=$@
892 # Build the kernel release string
894 # The KERNELRELEASE value built here is stored in the file
895 # include/config/kernel.release, and is used when executing several
896 # make targets, such as "make install" or "make modules_install."
898 # The eventual kernel release string consists of the following fields,
899 # shown in a hierarchical format to show how smaller parts are concatenated
900 # to form the larger and final value, with values coming from places like
901 # the Makefile, kernel config options, make command line options and/or
902 # SCM tag information.
906 # $(PATCHLEVEL) eg, 6
908 # $(EXTRAVERSION) eg, -rc6
911 # localversion* (files without backups, containing '~')
912 # $(CONFIG_LOCALVERSION) (from kernel config setting)
913 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
914 # ./scripts/setlocalversion (SCM tag, if one exists)
915 # $(LOCALVERSION) (from make command line if provided)
917 # Note how the final $(localver-auto) string is included *only* if the
918 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
919 # moment, only git is supported but other SCMs can edit the script
920 # scripts/setlocalversion and add the appropriate checks as needed.
922 pattern
= ".*/localversion[^~]*"
923 string
= $(shell cat
/dev
/null \
924 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
926 localver
= $(subst $(space
),, $(string
) \
927 $(patsubst "%",%,$(CONFIG_LOCALVERSION
)))
929 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
930 # and if the SCM is know a tag from the SCM is appended.
931 # The appended tag is determined by the SCM used.
933 # .scmversion is used when generating rpm packages so we do not loose
934 # the version information from the SCM when we do the build of the kernel
935 # from the copied source
936 ifdef CONFIG_LOCALVERSION_AUTO
938 ifeq ($(wildcard .scmversion
),)
939 _localver-auto
= $(shell $(CONFIG_SHELL
) \
940 $(srctree
)/scripts
/setlocalversion
$(srctree
))
942 _localver-auto
= $(shell cat .scmversion
2> /dev
/null
)
945 localver-auto
= $(LOCALVERSION
)$(_localver-auto
)
948 localver-full
= $(localver
)$(localver-auto
)
950 # Store (new) KERNELRELASE string in include/config/kernel.release
951 kernelrelease
= $(KERNELVERSION
)$(localver-full
)
952 include/config
/kernel.release
: include/config
/auto.conf FORCE
954 $(Q
)echo
$(kernelrelease
) > $@
957 # Things we need to do before we recursively start building the kernel
958 # or the modules are listed in "prepare".
959 # A multi level approach is used. prepareN is processed before prepareN-1.
960 # archprepare is used in arch Makefiles and when processed asm symlink,
961 # version.h and scripts_basic is processed / created.
963 # Listed in dependency order
964 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
966 # prepare3 is used to check if we are building in a separate output directory,
968 # 1) Check that make has not been executed in the kernel src $(srctree)
969 prepare3
: include/config
/kernel.release
970 ifneq ($(KBUILD_SRC
),)
971 @
$(kecho
) ' Using $(srctree) as source for kernel'
972 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
973 echo
" $(srctree) is not clean, please run 'make mrproper'";\
974 echo
" in the '$(srctree)' directory.";\
979 # prepare2 creates a makefile if using a separate output directory
980 prepare2
: prepare3 outputmakefile
982 prepare1
: prepare2
include/linux
/version.h
include/generated
/utsrelease.h \
983 include/config
/auto.conf
986 archprepare
: prepare1 scripts_basic
988 prepare0
: archprepare FORCE
989 $(Q
)$(MAKE
) $(build
)=.
990 $(Q
)$(MAKE
) $(build
)=. missing-syscalls
992 # All the preparing..
995 # Generate some files
996 # ---------------------------------------------------------------------------
998 # KERNELRELEASE can change from a few different places, meaning version.h
999 # needs to be updated, so this check is forced on all builds
1002 define filechk_utsrelease.h
1003 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
1004 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1007 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1010 define filechk_version.h
1011 (echo \
#define LINUX_VERSION_CODE $(shell \
1012 expr
$(VERSION
) \
* 65536 + $(PATCHLEVEL
) \
* 256 + $(SUBLEVEL
)); \
1013 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1016 include/linux
/version.h
: $(srctree
)/Makefile FORCE
1017 $(call filechk
,version.h
)
1019 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
1020 $(call filechk
,utsrelease.h
)
1024 $(Q
)find
include/ -name
'*.h' | xargs
--max-args
1 scripts
/headerdep.pl
1026 # ---------------------------------------------------------------------------
1030 @echo
'*** Warning: make $@ is unnecessary now.'
1032 # ---------------------------------------------------------------------------
1034 INSTALL_FW_PATH
=$(INSTALL_MOD_PATH
)/lib
/firmware
1035 export INSTALL_FW_PATH
1037 PHONY
+= firmware_install
1038 firmware_install
: FORCE
1039 @mkdir
-p
$(objtree
)/firmware
1040 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_install
1042 # ---------------------------------------------------------------------------
1045 #Default location for installed headers
1046 export INSTALL_HDR_PATH
= $(objtree
)/usr
1048 hdr-inst
:= -rR
-f
$(srctree
)/scripts
/Makefile.headersinst obj
1050 # If we do an all arch process set dst to asm-$(hdr-arch)
1051 hdr-dst
= $(if
$(KBUILD_HEADERS
), dst
=include/asm-
$(hdr-arch
), dst
=include/asm
)
1054 __headers
: include/linux
/version.h scripts_basic FORCE
1055 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
1057 PHONY
+= headers_install_all
1058 headers_install_all
:
1059 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
install
1061 PHONY
+= headers_install
1062 headers_install
: __headers
1063 $(if
$(wildcard $(srctree
)/arch
/$(hdr-arch
)/include/asm
/Kbuild
),, \
1064 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
1065 $(Q
)$(MAKE
) $(hdr-inst
)=include
1066 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/asm
$(hdr-dst
)
1068 PHONY
+= headers_check_all
1069 headers_check_all
: headers_install_all
1070 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
check
1072 PHONY
+= headers_check
1073 headers_check
: headers_install
1074 $(Q
)$(MAKE
) $(hdr-inst
)=include HDRCHECK
=1
1075 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/asm
$(hdr-dst
) HDRCHECK
=1
1077 # ---------------------------------------------------------------------------
1080 ifdef CONFIG_MODULES
1082 # By default, build modules as well
1088 # A module can be listed more than once in obj-m resulting in
1089 # duplicate lines in modules.order files. Those are removed
1090 # using awk while concatenating to the final file.
1093 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
)
1094 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.order
) > $(objtree
)/modules.order
1095 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.builtin
) > $(objtree
)/modules.builtin
1096 @
$(kecho
) ' Building modules, stage 2.';
1097 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1098 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modbuild
1101 # Target to prepare building external modules
1102 PHONY
+= modules_prepare
1103 modules_prepare
: prepare scripts
1105 # Target to install modules
1106 PHONY
+= modules_install
1107 modules_install
: _modinst_ _modinst_post
1111 @if
[ -z
"`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1112 echo
"Warning: you may need to install module-init-tools"; \
1113 echo
"See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1116 @
rm -rf
$(MODLIB
)/kernel
1117 @
rm -f
$(MODLIB
)/source
1118 @mkdir
-p
$(MODLIB
)/kernel
1119 @ln
-s
$(srctree
) $(MODLIB
)/source
1120 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1121 rm -f
$(MODLIB
)/build
; \
1122 ln
-s
$(objtree
) $(MODLIB
)/build
; \
1124 @cp
-f
$(objtree
)/modules.order
$(MODLIB
)/
1125 @cp
-f
$(objtree
)/modules.builtin
$(MODLIB
)/
1126 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1128 # This depmod is only for convenience to give the initial
1129 # boot a modules.dep even before / is mounted read-write. However the
1130 # boot script depmod is the master version.
1131 PHONY
+= _modinst_post
1132 _modinst_post
: _modinst_
1133 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modinst
1136 else # CONFIG_MODULES
1138 # Modules not configured
1139 # ---------------------------------------------------------------------------
1141 modules modules_install
: FORCE
1143 @echo
"The present kernel configuration has modules disabled."
1144 @echo
"Type 'make config' and enable loadable module support."
1145 @echo
"Then build a kernel with module support enabled."
1149 endif # CONFIG_MODULES
1152 # Cleaning is done on three levels.
1153 # make clean Delete most generated files
1154 # Leave enough to build external modules
1155 # make mrproper Delete the current configuration, and all generated files
1156 # make distclean Remove editor backup files, patch leftover files and the like
1158 # Directories & files removed with 'make clean'
1159 CLEAN_DIRS
+= $(MODVERDIR
)
1160 CLEAN_FILES
+= vmlinux System.map \
1161 .tmp_kallsyms
* .tmp_version .tmp_vmlinux
* .tmp_System.map
1163 # Directories & files removed with 'make mrproper'
1164 MRPROPER_DIRS
+= include/config usr
/include include/generated
1165 MRPROPER_FILES
+= .config .config.old .version .old_version \
1166 include/linux
/version.h \
1167 Module.symvers
tags TAGS cscope
*
1169 # clean - Delete most, but leave enough to build external modules
1171 clean: rm-dirs
:= $(CLEAN_DIRS
)
1172 clean: rm-files
:= $(CLEAN_FILES
)
1173 clean-dirs
:= $(addprefix _clean_
,$(srctree
) $(vmlinux-alldirs
) Documentation
)
1175 PHONY
+= $(clean-dirs
) clean archclean
1177 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1179 clean: archclean
$(clean-dirs
)
1182 @find .
$(RCS_FIND_IGNORE
) \
1183 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1184 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1185 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1186 -o
-name modules.builtin
-o
-name
'.tmp_*.o.*' \
1187 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1189 # mrproper - Delete all generated files, including .config
1191 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1192 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1193 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
1195 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1197 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1199 mrproper
: clean archmrproper
$(mrproper-dirs
)
1208 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1209 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1210 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1211 -o
-name
'.*.rej' -o
-size
0 \
1212 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
1213 -type f
-print | xargs
rm -f
1216 # Packaging of the kernel to various formats
1217 # ---------------------------------------------------------------------------
1218 # rpm target kept for backward compatibility
1219 package-dir
:= $(srctree
)/scripts
/package
1221 %pkg
: include/config
/kernel.release FORCE
1222 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1223 rpm
: include/config
/kernel.release FORCE
1224 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1227 # Brief documentation of the typical targets used
1228 # ---------------------------------------------------------------------------
1230 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1231 boards
:= $(notdir $(boards
))
1232 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1233 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1236 @echo
'Cleaning targets:'
1237 @echo
' clean - Remove most generated files but keep the config and'
1238 @echo
' enough build support to build external modules'
1239 @echo
' mrproper - Remove all generated files + config + various backup files'
1240 @echo
' distclean - mrproper + remove editor backup and patch files'
1242 @echo
'Configuration targets:'
1243 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1245 @echo
'Other generic targets:'
1246 @echo
' all - Build all targets marked with [*]'
1247 @echo
'* vmlinux - Build the bare kernel'
1248 @echo
'* modules - Build all modules'
1249 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1250 @echo
' firmware_install- Install all firmware to INSTALL_FW_PATH'
1251 @echo
' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1252 @echo
' dir/ - Build all files in dir and below'
1253 @echo
' dir/file.[ois] - Build specified target only'
1254 @echo
' dir/file.ko - Build module including final link'
1255 @echo
' modules_prepare - Set up for building external modules'
1256 @echo
' tags/TAGS - Generate tags file for editors'
1257 @echo
' cscope - Generate cscope index'
1258 @echo
' kernelrelease - Output the release version string'
1259 @echo
' kernelversion - Output the version stored in Makefile'
1260 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1261 echo
' (default: $(INSTALL_HDR_PATH))'; \
1263 @echo
'Static analysers'
1264 @echo
' checkstack - Generate a list of stack hogs'
1265 @echo
' namespacecheck - Name space analysis on compiled kernel'
1266 @echo
' versioncheck - Sanity check on version.h usage'
1267 @echo
' includecheck - Check for duplicate included header files'
1268 @echo
' export_report - List the usages of all exported symbols'
1269 @echo
' headers_check - Sanity check on exported headers'
1270 @echo
' headerdep - Detect inclusion cycles in headers'; \
1272 @echo
'Kernel packaging:'
1273 @
$(MAKE
) $(build
)=$(package-dir
) help
1275 @echo
'Documentation targets:'
1276 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1278 @echo
'Architecture specific targets ($(SRCARCH)):'
1279 @
$(if
$(archhelp
),$(archhelp
),\
1280 echo
' No architecture specific help defined for $(SRCARCH)')
1283 $(foreach b
, $(boards
), \
1284 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1286 @
$(if
$(board-dirs
), \
1287 $(foreach b
, $(board-dirs
), \
1288 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1289 printf
" %-16s - Show all of the above\\n" help-boards
; \
1292 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1293 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1294 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1295 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1296 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1298 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1299 @echo
'For further info see the ./README file'
1302 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1304 help-boards
: $(help-board-dirs
)
1306 boards-per-dir
= $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
))
1308 $(help-board-dirs
): help-
%:
1309 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1310 @
$(if
$(boards-per-dir
), \
1311 $(foreach b
, $(boards-per-dir
), \
1312 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1316 # Documentation targets
1317 # ---------------------------------------------------------------------------
1318 %docs
: scripts_basic FORCE
1319 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1321 else # KBUILD_EXTMOD
1324 # External module support.
1325 # When building external modules the kernel used as basis is considered
1326 # read-only, and no consistency checks are made and the make
1327 # system is not used on the basis kernel. If updates are required
1328 # in the basis kernel ordinary make commands (without M=...) must
1331 # The following are the only valid targets when building external
1333 # make M=dir clean Delete all automatically generated files
1334 # make M=dir modules Make all modules in specified dir
1335 # make M=dir Same as 'make M=dir modules'
1336 # make M=dir modules_install
1337 # Install the modules built in the module directory
1338 # Assumes install directory is already created
1340 # We are always building modules
1342 PHONY
+= crmodverdir
1346 PHONY
+= $(objtree
)/Module.symvers
1347 $(objtree
)/Module.symvers
:
1348 @
test -e
$(objtree
)/Module.symvers ||
( \
1350 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1351 echo
" is missing; modules will have no dependencies and modversions."; \
1354 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1355 PHONY
+= $(module-dirs
) modules
1356 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1357 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1359 modules
: $(module-dirs
)
1360 @
$(kecho
) ' Building modules, stage 2.';
1361 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1363 PHONY
+= modules_install
1364 modules_install
: _emodinst_ _emodinst_post
1366 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1369 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1370 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1372 PHONY
+= _emodinst_post
1373 _emodinst_post
: _emodinst_
1376 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1378 PHONY
+= $(clean-dirs
) clean
1380 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1382 clean: rm-dirs
:= $(MODVERDIR
)
1383 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers \
1384 $(KBUILD_EXTMOD
)/modules.order \
1385 $(KBUILD_EXTMOD
)/modules.builtin
1386 clean: $(clean-dirs
)
1389 @find
$(KBUILD_EXTMOD
) $(RCS_FIND_IGNORE
) \
1390 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1391 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1392 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1395 @echo
' Building external modules.'
1396 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1398 @echo
' modules - default target, build the module(s)'
1399 @echo
' modules_install - install the module'
1400 @echo
' clean - remove generated files in module directory only'
1404 PHONY
+= prepare scripts
1407 endif # KBUILD_EXTMOD
1409 # Generate tags for editors
1410 # ---------------------------------------------------------------------------
1411 quiet_cmd_tags
= GEN
$@
1412 cmd_tags
= $(CONFIG_SHELL
) $(srctree
)/scripts
/tags.sh
$@
1414 tags TAGS cscope
: FORCE
1417 # Scripts to check various things for consistency
1418 # ---------------------------------------------------------------------------
1421 find
* $(RCS_FIND_IGNORE
) \
1422 -name
'*.[hcS]' -type f
-print |
sort \
1423 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1426 find
* $(RCS_FIND_IGNORE
) \
1427 -name
'*.[hcS]' -type f
-print |
sort \
1428 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1431 $(PERL
) $(srctree
)/scripts
/namespace.pl
1434 $(PERL
) $(srctree
)/scripts
/export_report.pl
1436 endif #ifeq ($(config-targets),1)
1437 endif #ifeq ($(mixed-targets),1)
1439 PHONY
+= checkstack kernelrelease kernelversion
1441 # UML needs a little special treatment here. It wants to use the host
1442 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1443 # else wants $(ARCH), including people doing cross-builds, which means
1444 # that $(SUBARCH) doesn't work here.
1446 CHECKSTACK_ARCH
:= $(SUBARCH
)
1448 CHECKSTACK_ARCH
:= $(ARCH
)
1451 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1452 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1455 $(if
$(wildcard include/config
/kernel.release
), $(Q
)echo
$(KERNELRELEASE
), \
1456 $(error kernelrelease not valid
- run
'make prepare' to update it
))
1458 @echo
$(KERNELVERSION
)
1461 # ---------------------------------------------------------------------------
1462 # Single targets are compatible with:
1463 # - build with mixed source and output
1464 # - build with separate output dir 'make O=...'
1465 # - external modules
1467 # target-dir => where to store outputfile
1468 # build-dir => directory in kernel source tree to use
1470 ifeq ($(KBUILD_EXTMOD
),)
1471 build-dir
= $(patsubst %/,%,$(dir $@
))
1472 target-dir
= $(dir $@
)
1474 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1475 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1476 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1479 %.s
: %.c prepare scripts FORCE
1480 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1481 %.i
: %.c prepare scripts FORCE
1482 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1483 %.o
: %.c prepare scripts FORCE
1484 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1485 %.lst
: %.c prepare scripts FORCE
1486 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1487 %.s
: %.S prepare scripts FORCE
1488 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1489 %.o
: %.S prepare scripts FORCE
1490 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1491 %.symtypes
: %.c prepare scripts FORCE
1492 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1495 /: prepare scripts FORCE
1497 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1498 $(build
)=$(build-dir
)
1499 %/: prepare scripts FORCE
1501 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1502 $(build
)=$(build-dir
)
1503 %.ko
: prepare scripts FORCE
1505 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1506 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1507 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1509 # FIXME Should go into a make.lib or something
1510 # ===========================================================================
1512 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1513 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1515 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1516 cmd_rmfiles
= rm -f
$(rm-files
)
1518 # Run depmod only if we have System.map and depmod is executable
1519 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1521 if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then \
1522 $(DEPMOD
) -ae
-F System.map \
1523 $(if
$(strip $(INSTALL_MOD_PATH
)), -b
$(INSTALL_MOD_PATH
) ) \
1527 # Create temporary dir for module support files
1528 # clean it up only when building all modules
1529 cmd_crmodverdir
= $(Q
)mkdir
-p
$(MODVERDIR
) \
1530 $(if
$(KBUILD_MODULES
),; rm -f
$(MODVERDIR
)/*)
1532 a_flags
= -Wp
,-MD
,$(depfile
) $(KBUILD_AFLAGS
) $(AFLAGS_KERNEL
) \
1533 $(NOSTDINC_FLAGS
) $(LINUXINCLUDE
) $(KBUILD_CPPFLAGS
) \
1534 $(modkern_aflags
) $(EXTRA_AFLAGS
) $(AFLAGS_
$(basetarget
).o
)
1536 quiet_cmd_as_o_S
= AS
$@
1537 cmd_as_o_S
= $(CC
) $(a_flags
) -c
-o
$@
$<
1539 # read all saved command lines
1541 targets
:= $(wildcard $(sort $(targets
)))
1542 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1544 ifneq ($(cmd_files
),)
1545 $(cmd_files
): ; # Do not try to update included dependency files
1546 include $(cmd_files
)
1549 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1551 # $(Q)$(MAKE) $(clean)=dir
1552 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1554 endif # skip-makefile
1559 # Declare the contents of the .PHONY variable as phony. We keep that
1560 # information in a variable so we can use it in if_changed and friends.