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
)
192 CROSS_COMPILE ?
= $(CONFIG_CROSS_COMPILE
:"%"=%)
194 # Architecture as present in compile.h
195 UTS_MACHINE
:= $(ARCH
)
198 # Additional ARCH settings for x86
202 ifeq ($(ARCH
),x86_64
)
206 # Additional ARCH settings for sparc
207 ifeq ($(ARCH
),sparc64
)
211 # Additional ARCH settings for sh
216 # Where to locate arch specific headers
217 hdr-arch
:= $(SRCARCH
)
219 ifeq ($(ARCH
),m68knommu
)
223 KCONFIG_CONFIG ?
= .config
225 # SHELL used by kbuild
226 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
227 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
228 else echo sh
; fi
; fi
)
232 HOSTCFLAGS
= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2
-fomit-frame-pointer
235 # Decide whether to build built-in, modular, or both.
236 # Normally, just do built-in.
241 # If we have only "make modules", don't compile built-in objects.
242 # When we're building modules with modversions, we need to consider
243 # the built-in objects during the descend as well, in order to
244 # make sure the checksums are up to date before we record them.
246 ifeq ($(MAKECMDGOALS
),modules
)
247 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
250 # If we have "make <whatever> modules", compile modules
251 # in addition to whatever we do anyway.
252 # Just "make" or "make all" shall build modules as well
254 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
258 ifeq ($(MAKECMDGOALS
),)
262 export KBUILD_MODULES KBUILD_BUILTIN
263 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
266 # ---------------------------------------------------------------------------
268 # Normally, we echo the whole command before executing it. By making
269 # that echo $($(quiet)$(cmd)), we now have the possibility to set
270 # $(quiet) to choose other forms of output instead, e.g.
272 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
273 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
275 # If $(quiet) is empty, the whole command will be printed.
276 # If it is set to "quiet_", only the short version will be printed.
277 # If it is set to "silent_", nothing will be printed at all, since
278 # the variable $(silent_cmd_cc_o_c) doesn't exist.
280 # A simple variant is to prefix commands with $(Q) - that's useful
281 # for commands that shall be hidden in non-verbose mode.
285 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
286 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
288 ifeq ($(KBUILD_VERBOSE
),1)
296 # If the user is running make -s (silent mode), suppress echoing of
299 ifneq ($(findstring s
,$(MAKEFLAGS
)),)
303 export quiet Q KBUILD_VERBOSE
306 # Look for make include files relative to root of kernel src
307 MAKEFLAGS
+= --include-dir
=$(srctree
)
309 # We need some generic definitions (do not try to remake the file).
310 $(srctree
)/scripts
/Kbuild.
include: ;
311 include $(srctree
)/scripts
/Kbuild.
include
313 # Make variables (CC, etc...)
315 AS
= $(CROSS_COMPILE
)as
316 LD
= $(CROSS_COMPILE
)ld
317 CC
= $(CROSS_COMPILE
)gcc
319 AR
= $(CROSS_COMPILE
)ar
320 NM
= $(CROSS_COMPILE
)nm
321 STRIP
= $(CROSS_COMPILE
)strip
322 OBJCOPY
= $(CROSS_COMPILE
)objcopy
323 OBJDUMP
= $(CROSS_COMPILE
)objdump
325 GENKSYMS
= scripts
/genksyms
/genksyms
326 INSTALLKERNEL
:= installkernel
327 DEPMOD
= /sbin
/depmod
328 KALLSYMS
= scripts
/kallsyms
332 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
333 -Wbitwise
-Wno-return-void
$(CF
)
339 CFLAGS_GCOV
= -fprofile-arcs
-ftest-coverage
342 # Use LINUXINCLUDE when you must reference the include/ directory.
343 # Needed to be compatible with the O= option
344 LINUXINCLUDE
:= -I
$(srctree
)/arch
/$(hdr-arch
)/include -Iinclude \
345 $(if
$(KBUILD_SRC
), -I
$(srctree
)/include) \
346 -include include/generated
/autoconf.h
348 KBUILD_CPPFLAGS
:= -D__KERNEL__
350 KBUILD_CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
351 -fno-strict-aliasing
-fno-common \
352 -Werror-implicit-function-declaration \
353 -Wno-format-security \
354 -fno-delete-null-pointer-checks
355 KBUILD_AFLAGS_KERNEL
:=
356 KBUILD_CFLAGS_KERNEL
:=
357 KBUILD_AFLAGS
:= -D__ASSEMBLY__
358 KBUILD_AFLAGS_MODULE
:= -DMODULE
359 KBUILD_CFLAGS_MODULE
:= -DMODULE
360 KBUILD_LDFLAGS_MODULE
:= -T
$(srctree
)/scripts
/module-common.lds
362 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
363 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
364 KERNELVERSION
= $(VERSION
).
$(PATCHLEVEL
).
$(SUBLEVEL
)$(EXTRAVERSION
)
366 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
367 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
368 export CPP AR NM STRIP OBJCOPY OBJDUMP
369 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
370 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
372 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
373 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
374 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
375 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
376 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
378 # When compiling out-of-tree modules, put MODVERDIR in the module
379 # tree rather than in the kernel tree. The kernel tree might
381 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
383 # Files to ignore in find ... statements
385 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
386 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn
--exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
388 # ===========================================================================
389 # Rules shared between *config targets and build targets
391 # Basic helpers built in scripts/
392 PHONY
+= scripts_basic
394 $(Q
)$(MAKE
) $(build
)=scripts
/basic
395 $(Q
)rm -f .tmp_quiet_recordmcount
397 # To avoid any implicit rule to kick in, define an empty command.
398 scripts
/basic
/%: scripts_basic
;
400 PHONY
+= outputmakefile
401 # outputmakefile generates a Makefile in the output directory, if using a
402 # separate output directory. This allows convenient use of make in the
405 ifneq ($(KBUILD_SRC
),)
406 $(Q
)ln
-fsn
$(srctree
) source
407 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
408 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
411 # To make sure we do not include .config for any of the *config targets
412 # catch them early, and hand them over to scripts/kconfig/Makefile
413 # It is allowed to specify more targets when calling make, including
414 # mixing *config targets and build targets.
415 # For example 'make oldconfig all'.
416 # Detect when mixed targets is specified, and make a second invocation
417 # of make so .config is not included in this case either (for *config).
419 no-dot-config-targets
:= clean mrproper
distclean \
420 cscope TAGS
tags help
%docs
check% coccicheck \
421 include/linux
/version.h headers_
% \
422 kernelversion
%src-pkg
428 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
429 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
434 ifeq ($(KBUILD_EXTMOD
),)
435 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
437 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
443 ifeq ($(mixed-targets
),1)
444 # ===========================================================================
445 # We're called with mixed targets (*config and build targets).
446 # Handle them one by one.
449 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
452 ifeq ($(config-targets
),1)
453 # ===========================================================================
454 # *config targets only - make sure prerequisites are updated, and descend
455 # in scripts/kconfig to make the *config target
457 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
458 # KBUILD_DEFCONFIG may point out an alternative default configuration
459 # used for 'make defconfig'
460 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
461 export KBUILD_DEFCONFIG KBUILD_KCONFIG
463 config
: scripts_basic outputmakefile FORCE
464 $(Q
)mkdir
-p
include/linux
include/config
465 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
467 %config
: scripts_basic outputmakefile FORCE
468 $(Q
)mkdir
-p
include/linux
include/config
469 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
472 # ===========================================================================
473 # Build targets only - this includes vmlinux, arch specific targets, clean
474 # targets and others. In general all targets except *config targets.
476 ifeq ($(KBUILD_EXTMOD
),)
477 # Additional helpers built in scripts/
478 # Carefully list dependencies so we do not try to build scripts twice
481 scripts
: scripts_basic
include/config
/auto.conf
include/config
/tristate.conf
482 $(Q
)$(MAKE
) $(build
)=$(@
)
484 # Objects we will link into vmlinux / subdirs we need to visit
486 drivers-y
:= drivers
/ sound
/ firmware
/
490 endif # KBUILD_EXTMOD
492 ifeq ($(dot-config
),1)
494 -include include/config
/auto.conf
496 ifeq ($(KBUILD_EXTMOD
),)
497 # Read in dependencies to all Kconfig* files, make sure to run
498 # oldconfig if changes are detected.
499 -include include/config
/auto.conf.cmd
501 # To avoid any implicit rule to kick in, define an empty command
502 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
504 # If .config is newer than include/config/auto.conf, someone tinkered
505 # with it and forgot to run make oldconfig.
506 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
507 # we execute the config step to be sure to catch updated Kconfig files
508 include/config
/%.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
509 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
511 # external modules needs include/generated/autoconf.h and include/config/auto.conf
512 # but do not care if they are up-to-date. Use auto.conf to trigger the test
513 PHONY
+= include/config
/auto.conf
515 include/config
/auto.conf
:
516 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
518 echo
" ERROR: Kernel configuration is invalid."; \
519 echo
" include/generated/autoconf.h or $@ are missing.";\
520 echo
" Run 'make oldconfig && make prepare' on kernel src to fix it."; \
524 endif # KBUILD_EXTMOD
527 # Dummy target needed, because used as prerequisite
528 include/config
/auto.conf
: ;
529 endif # $(dot-config)
531 # The all: target is the default when no target is given on the
533 # This allow a user to issue only 'make' to build a kernel including modules
534 # Defaults to vmlinux, but the arch makefile usually adds further targets
537 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
543 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
545 ifneq ($(CONFIG_FRAME_WARN
),0)
546 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
549 # Force gcc to behave correct even for buggy distributions
550 ifndef CONFIG_CC_STACKPROTECTOR
551 KBUILD_CFLAGS
+= $(call cc-option
, -fno-stack-protector
)
554 ifdef CONFIG_FRAME_POINTER
555 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
557 KBUILD_CFLAGS
+= -fomit-frame-pointer
560 ifdef CONFIG_DEBUG_INFO
562 KBUILD_AFLAGS
+= -gdwarf-2
565 ifdef CONFIG_DEBUG_INFO_REDUCED
566 KBUILD_CFLAGS
+= $(call cc-option
, -femit-struct-debug-baseonly
)
569 ifdef CONFIG_FUNCTION_TRACER
573 # We trigger additional mismatches with less inlining
574 ifdef CONFIG_DEBUG_SECTION_MISMATCH
575 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
578 # arch Makefile may override CC so keep this after arch Makefile is included
579 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
580 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
582 # warn about C99 declaration after statement
583 KBUILD_CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
585 # disable pointer signed / unsigned warnings in gcc 4.0
586 KBUILD_CFLAGS
+= $(call cc-option
,-Wno-pointer-sign
,)
588 # disable invalid "can't wrap" optimizations for signed / pointers
589 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
591 # conserve stack if available
592 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
594 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
595 # But warn user when we do so
597 $(warning
"WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
599 ifneq ($(KCPPFLAGS
),)
600 $(call warn-assign
,CPPFLAGS
)
601 KBUILD_CPPFLAGS
+= $(KCPPFLAGS
)
604 $(call warn-assign
,AFLAGS
)
605 KBUILD_AFLAGS
+= $(KAFLAGS
)
608 $(call warn-assign
,CFLAGS
)
609 KBUILD_CFLAGS
+= $(KCFLAGS
)
612 # Use --build-id when available.
613 LDFLAGS_BUILD_ID
= $(patsubst -Wl
$(comma
)%,%,\
614 $(call cc-ldoption
, -Wl
$(comma
)--build-id
,))
615 KBUILD_LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
616 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
618 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
619 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
622 # Default kernel image to build when no specific target is given.
623 # KBUILD_IMAGE may be overruled on the command line or
624 # set in the environment
625 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
627 export KBUILD_IMAGE ?
= vmlinux
630 # INSTALL_PATH specifies where to place the updated kernel and system map
631 # images. Default is /boot, but you can set it to other values
632 export INSTALL_PATH ?
= /boot
635 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
636 # relocations required by build roots. This is not defined in the
637 # makefile but the argument can be passed to make if needed.
640 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
644 # INSTALL_MOD_STRIP, if defined, will cause modules to be
645 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
646 # the default option --strip-debug will be used. Otherwise,
647 # INSTALL_MOD_STRIP will used as the options to the strip command.
649 ifdef INSTALL_MOD_STRIP
650 ifeq ($(INSTALL_MOD_STRIP
),1)
651 mod_strip_cmd
= $(STRIP
) --strip-debug
653 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
654 endif # INSTALL_MOD_STRIP=1
657 endif # INSTALL_MOD_STRIP
661 ifeq ($(KBUILD_EXTMOD
),)
662 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
664 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
665 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
666 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
668 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
670 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
671 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
673 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
674 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
675 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
676 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
677 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
678 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
679 libs-y
:= $(libs-y1
) $(libs-y2
)
682 # ---------------------------------------------------------------------------
683 # vmlinux is built from the objects selected by $(vmlinux-init) and
684 # $(vmlinux-main). Most are built-in.o files from top-level directories
685 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
686 # Ordering when linking is important, and $(vmlinux-init) must be first.
691 # +-< $(vmlinux-init)
692 # | +--< init/version.o + more
694 # +--< $(vmlinux-main)
695 # | +--< driver/built-in.o mm/built-in.o + more
697 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
699 # vmlinux version (uname -v) cannot be updated during normal
700 # descending-into-subdirs phase since we do not yet know if we need to
702 # Therefore this step is delayed until just before final link of vmlinux -
703 # except in the kallsyms case where it is done just before adding the
704 # symbols to the kernel.
706 # System.map is generated to document addresses of all kernel symbols
708 vmlinux-init
:= $(head-y
) $(init-y
)
709 vmlinux-main
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
710 vmlinux-all
:= $(vmlinux-init
) $(vmlinux-main
)
711 vmlinux-lds
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
712 export KBUILD_VMLINUX_OBJS
:= $(vmlinux-all
)
714 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
715 # May be overridden by arch/$(ARCH)/Makefile
716 quiet_cmd_vmlinux__ ?
= LD
$@
717 cmd_vmlinux__ ?
= $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
) -o
$@ \
718 -T
$(vmlinux-lds
) $(vmlinux-init
) \
719 --start-group
$(vmlinux-main
) --end-group \
720 $(filter-out $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) vmlinux.o FORCE
,$^
)
722 # Generate new vmlinux version
723 quiet_cmd_vmlinux_version
= GEN .version
724 cmd_vmlinux_version
= set
-e
; \
725 if
[ ! -r .version
]; then \
729 mv .version .old_version
; \
730 expr
0$$(cat .old_version
) + 1 >.version
; \
732 $(MAKE
) $(build
)=init
734 # Generate System.map
735 quiet_cmd_sysmap
= SYSMAP
736 cmd_sysmap
= $(CONFIG_SHELL
) $(srctree
)/scripts
/mksysmap
739 # If CONFIG_KALLSYMS is set .version is already updated
740 # Generate System.map and verify that the content is consistent
741 # Use + in front of the vmlinux_version rule to silent warning with make -j2
742 # First command is ':' to allow us to use + in front of the rule
743 define rule_vmlinux__
745 $(if
$(CONFIG_KALLSYMS
),,+$(call cmd
,vmlinux_version
))
747 $(call cmd
,vmlinux__
)
748 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
750 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
751 echo
' $($(quiet)cmd_sysmap) System.map' &&) \
752 $(cmd_sysmap
) $@ System.map
; \
753 if
[ $$?
-ne
0 ]; then \
761 ifdef CONFIG_KALLSYMS
762 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
763 # It's a three stage process:
764 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
766 # Running kallsyms on that gives us .tmp_kallsyms1.o with
767 # the right size - vmlinux version (uname -v) is updated during this step
768 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
769 # but due to the added section, some addresses have shifted.
770 # From here, we generate a correct .tmp_kallsyms2.o
771 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
772 # o Verify that the System.map from vmlinux matches the map from
773 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
774 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
775 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
776 # temporary bypass to allow the kernel to be built while the
777 # maintainers work out what went wrong with kallsyms.
779 ifdef CONFIG_KALLSYMS_EXTRA_PASS
785 kallsyms.o
:= .tmp_kallsyms
$(last_kallsyms
).o
787 define verify_kallsyms
788 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
789 echo
' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
790 $(cmd_sysmap
) .tmp_vmlinux
$(last_kallsyms
) .tmp_System.map
791 $(Q
)cmp
-s System.map .tmp_System.map || \
792 (echo Inconsistent kallsyms data
; \
793 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS
; \
794 rm .tmp_kallsyms
* ; /bin
/false
)
797 # Update vmlinux version before link
798 # Use + in front of this rule to silent warning about make -j1
799 # First command is ':' to allow us to use + in front of this rule
800 cmd_ksym_ld
= $(cmd_vmlinux__
)
803 +$(call cmd
,vmlinux_version
)
804 $(call cmd
,vmlinux__
)
805 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
808 # Generate .S file with all kernel symbols
809 quiet_cmd_kallsyms
= KSYM
$@
810 cmd_kallsyms
= $(NM
) -n
$< |
$(KALLSYMS
) \
811 $(if
$(CONFIG_KALLSYMS_ALL
),--all-symbols
) > $@
813 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o
: %.o
: %.S scripts FORCE
814 $(call if_changed_dep
,as_o_S
)
816 .tmp_kallsyms
%.S
: .tmp_vmlinux
% $(KALLSYMS
)
819 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
820 .tmp_vmlinux1
: $(vmlinux-lds
) $(vmlinux-all
) FORCE
821 $(call if_changed_rule
,ksym_ld
)
823 .tmp_vmlinux2
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms1.o FORCE
824 $(call if_changed
,vmlinux__
)
826 .tmp_vmlinux3
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms2.o FORCE
827 $(call if_changed
,vmlinux__
)
829 # Needs to visit scripts/ before $(KALLSYMS) can be used.
830 $(KALLSYMS
): scripts
;
832 # Generate some data for debugging strange kallsyms problems
833 debug_kallsyms
: .tmp_map
$(last_kallsyms
)
835 .tmp_map
%: .tmp_vmlinux
% FORCE
836 ($(OBJDUMP
) -h
$< |
$(AWK
) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM
) $<) |
sort > $@
842 endif # ifdef CONFIG_KALLSYMS
844 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
845 # relevant sections renamed as per the linker script.
846 quiet_cmd_vmlinux-modpost
= LD
$@
847 cmd_vmlinux-modpost
= $(LD
) $(LDFLAGS
) -r
-o
$@ \
848 $(vmlinux-init
) --start-group
$(vmlinux-main
) --end-group \
849 $(filter-out $(vmlinux-init
) $(vmlinux-main
) FORCE
,$^
)
850 define rule_vmlinux-modpost
852 +$(call cmd
,vmlinux-modpost
)
853 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
$@
854 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target
).cmd
857 # vmlinux image - including updated kernel symbols
858 vmlinux
: $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) vmlinux.o
$(kallsyms.o
) FORCE
859 ifdef CONFIG_HEADERS_CHECK
860 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
863 $(Q
)$(MAKE
) $(build
)=samples
865 ifdef CONFIG_BUILD_DOCSRC
866 $(Q
)$(MAKE
) $(build
)=Documentation
868 $(call vmlinux-modpost
)
869 $(call if_changed_rule
,vmlinux__
)
870 $(Q
)rm -f .old_version
872 # build vmlinux.o first to catch section mismatch errors early
873 ifdef CONFIG_KALLSYMS
874 .tmp_vmlinux1
: vmlinux.o
877 modpost-init
:= $(filter-out init
/built-in.o
, $(vmlinux-init
))
878 vmlinux.o
: $(modpost-init
) $(vmlinux-main
) FORCE
879 $(call if_changed_rule
,vmlinux-modpost
)
881 # The actual objects are generated when descending,
882 # make sure no implicit rule kicks in
883 $(sort $(vmlinux-init
) $(vmlinux-main
)) $(vmlinux-lds
): $(vmlinux-dirs
) ;
885 # Handle descending into subdirectories listed in $(vmlinux-dirs)
886 # Preset locale variables to speed up the build process. Limit locale
887 # tweaks to this spot to avoid wrong language settings when running
888 # make menuconfig etc.
889 # Error messages still appears in the original language
891 PHONY
+= $(vmlinux-dirs
)
892 $(vmlinux-dirs
): prepare scripts
893 $(Q
)$(MAKE
) $(build
)=$@
895 # Store (new) KERNELRELASE string in include/config/kernel.release
896 include/config
/kernel.release
: include/config
/auto.conf FORCE
898 $(Q
)echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
901 # Things we need to do before we recursively start building the kernel
902 # or the modules are listed in "prepare".
903 # A multi level approach is used. prepareN is processed before prepareN-1.
904 # archprepare is used in arch Makefiles and when processed asm symlink,
905 # version.h and scripts_basic is processed / created.
907 # Listed in dependency order
908 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
910 # prepare3 is used to check if we are building in a separate output directory,
912 # 1) Check that make has not been executed in the kernel src $(srctree)
913 prepare3
: include/config
/kernel.release
914 ifneq ($(KBUILD_SRC
),)
915 @
$(kecho
) ' Using $(srctree) as source for kernel'
916 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
917 echo
" $(srctree) is not clean, please run 'make mrproper'";\
918 echo
" in the '$(srctree)' directory.";\
923 # prepare2 creates a makefile if using a separate output directory
924 prepare2
: prepare3 outputmakefile
926 prepare1
: prepare2
include/linux
/version.h
include/generated
/utsrelease.h \
927 include/config
/auto.conf
930 archprepare
: prepare1 scripts_basic
932 prepare0
: archprepare FORCE
933 $(Q
)$(MAKE
) $(build
)=.
934 $(Q
)$(MAKE
) $(build
)=. missing-syscalls
936 # All the preparing..
939 # Generate some files
940 # ---------------------------------------------------------------------------
942 # KERNELRELEASE can change from a few different places, meaning version.h
943 # needs to be updated, so this check is forced on all builds
946 define filechk_utsrelease.h
947 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
948 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
951 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
954 define filechk_version.h
955 (echo \
#define LINUX_VERSION_CODE $(shell \
956 expr
$(VERSION
) \
* 65536 + $(PATCHLEVEL
) \
* 256 + $(SUBLEVEL
)); \
957 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
960 include/linux
/version.h
: $(srctree
)/Makefile FORCE
961 $(call filechk
,version.h
)
963 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
964 $(call filechk
,utsrelease.h
)
968 $(Q
)find
include/ -name
'*.h' | xargs
--max-args
1 scripts
/headerdep.pl
970 # ---------------------------------------------------------------------------
974 @echo
'*** Warning: make $@ is unnecessary now.'
976 # ---------------------------------------------------------------------------
978 INSTALL_FW_PATH
=$(INSTALL_MOD_PATH
)/lib
/firmware
979 export INSTALL_FW_PATH
981 PHONY
+= firmware_install
982 firmware_install
: FORCE
983 @mkdir
-p
$(objtree
)/firmware
984 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_install
986 # ---------------------------------------------------------------------------
989 #Default location for installed headers
990 export INSTALL_HDR_PATH
= $(objtree
)/usr
992 hdr-inst
:= -rR
-f
$(srctree
)/scripts
/Makefile.headersinst obj
994 # If we do an all arch process set dst to asm-$(hdr-arch)
995 hdr-dst
= $(if
$(KBUILD_HEADERS
), dst
=include/asm-
$(hdr-arch
), dst
=include/asm
)
998 __headers
: include/linux
/version.h scripts_basic FORCE
999 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
1001 PHONY
+= headers_install_all
1002 headers_install_all
:
1003 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
install
1005 PHONY
+= headers_install
1006 headers_install
: __headers
1007 $(if
$(wildcard $(srctree
)/arch
/$(hdr-arch
)/include/asm
/Kbuild
),, \
1008 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
1009 $(Q
)$(MAKE
) $(hdr-inst
)=include
1010 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/asm
$(hdr-dst
)
1012 PHONY
+= headers_check_all
1013 headers_check_all
: headers_install_all
1014 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
check
1016 PHONY
+= headers_check
1017 headers_check
: headers_install
1018 $(Q
)$(MAKE
) $(hdr-inst
)=include HDRCHECK
=1
1019 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/asm
$(hdr-dst
) HDRCHECK
=1
1021 # ---------------------------------------------------------------------------
1024 ifdef CONFIG_MODULES
1026 # By default, build modules as well
1032 # A module can be listed more than once in obj-m resulting in
1033 # duplicate lines in modules.order files. Those are removed
1034 # using awk while concatenating to the final file.
1037 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
) modules.builtin
1038 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.order
) > $(objtree
)/modules.order
1039 @
$(kecho
) ' Building modules, stage 2.';
1040 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1041 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modbuild
1043 modules.builtin
: $(vmlinux-dirs
:%=%/modules.builtin
)
1044 $(Q
)$(AWK
) '!x[$$0]++' $^
> $(objtree
)/modules.builtin
1046 %/modules.builtin
: include/config
/auto.conf
1047 $(Q
)$(MAKE
) $(modbuiltin
)=$*
1050 # Target to prepare building external modules
1051 PHONY
+= modules_prepare
1052 modules_prepare
: prepare scripts
1054 # Target to install modules
1055 PHONY
+= modules_install
1056 modules_install
: _modinst_ _modinst_post
1060 @if
[ -z
"`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1061 echo
"Warning: you may need to install module-init-tools"; \
1062 echo
"See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1065 @
rm -rf
$(MODLIB
)/kernel
1066 @
rm -f
$(MODLIB
)/source
1067 @mkdir
-p
$(MODLIB
)/kernel
1068 @ln
-s
$(srctree
) $(MODLIB
)/source
1069 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1070 rm -f
$(MODLIB
)/build
; \
1071 ln
-s
$(objtree
) $(MODLIB
)/build
; \
1073 @cp
-f
$(objtree
)/modules.order
$(MODLIB
)/
1074 @cp
-f
$(objtree
)/modules.builtin
$(MODLIB
)/
1075 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1077 # This depmod is only for convenience to give the initial
1078 # boot a modules.dep even before / is mounted read-write. However the
1079 # boot script depmod is the master version.
1080 PHONY
+= _modinst_post
1081 _modinst_post
: _modinst_
1082 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modinst
1085 else # CONFIG_MODULES
1087 # Modules not configured
1088 # ---------------------------------------------------------------------------
1090 modules modules_install
: FORCE
1092 @echo
"The present kernel configuration has modules disabled."
1093 @echo
"Type 'make config' and enable loadable module support."
1094 @echo
"Then build a kernel with module support enabled."
1098 endif # CONFIG_MODULES
1101 # Cleaning is done on three levels.
1102 # make clean Delete most generated files
1103 # Leave enough to build external modules
1104 # make mrproper Delete the current configuration, and all generated files
1105 # make distclean Remove editor backup files, patch leftover files and the like
1107 # Directories & files removed with 'make clean'
1108 CLEAN_DIRS
+= $(MODVERDIR
)
1109 CLEAN_FILES
+= vmlinux System.map \
1110 .tmp_kallsyms
* .tmp_version .tmp_vmlinux
* .tmp_System.map
1112 # Directories & files removed with 'make mrproper'
1113 MRPROPER_DIRS
+= include/config usr
/include include/generated
1114 MRPROPER_FILES
+= .config .config.old .version .old_version \
1115 include/linux
/version.h \
1116 Module.symvers
tags TAGS cscope
*
1118 # clean - Delete most, but leave enough to build external modules
1120 clean: rm-dirs
:= $(CLEAN_DIRS
)
1121 clean: rm-files
:= $(CLEAN_FILES
)
1122 clean-dirs
:= $(addprefix _clean_
,$(srctree
) $(vmlinux-alldirs
) Documentation
)
1124 PHONY
+= $(clean-dirs
) clean archclean
1126 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1128 clean: archclean
$(clean-dirs
)
1131 @find .
$(RCS_FIND_IGNORE
) \
1132 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1133 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1134 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1135 -o
-name modules.builtin
-o
-name
'.tmp_*.o.*' \
1136 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1138 # mrproper - Delete all generated files, including .config
1140 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1141 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1142 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
1144 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1146 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1148 mrproper
: clean archmrproper
$(mrproper-dirs
)
1157 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1158 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1159 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1160 -o
-name
'.*.rej' -o
-size
0 \
1161 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
1162 -type f
-print | xargs
rm -f
1165 # Packaging of the kernel to various formats
1166 # ---------------------------------------------------------------------------
1167 # rpm target kept for backward compatibility
1168 package-dir
:= $(srctree
)/scripts
/package
1171 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1172 %pkg
: include/config
/kernel.release FORCE
1173 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1174 rpm
: include/config
/kernel.release FORCE
1175 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1178 # Brief documentation of the typical targets used
1179 # ---------------------------------------------------------------------------
1181 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1182 boards
:= $(notdir $(boards
))
1183 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1184 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1187 @echo
'Cleaning targets:'
1188 @echo
' clean - Remove most generated files but keep the config and'
1189 @echo
' enough build support to build external modules'
1190 @echo
' mrproper - Remove all generated files + config + various backup files'
1191 @echo
' distclean - mrproper + remove editor backup and patch files'
1193 @echo
'Configuration targets:'
1194 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1196 @echo
'Other generic targets:'
1197 @echo
' all - Build all targets marked with [*]'
1198 @echo
'* vmlinux - Build the bare kernel'
1199 @echo
'* modules - Build all modules'
1200 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1201 @echo
' firmware_install- Install all firmware to INSTALL_FW_PATH'
1202 @echo
' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1203 @echo
' dir/ - Build all files in dir and below'
1204 @echo
' dir/file.[oisS] - Build specified target only'
1205 @echo
' dir/file.lst - Build specified mixed source/assembly target only'
1206 @echo
' (requires a recent binutils and recent build (System.map))'
1207 @echo
' dir/file.ko - Build module including final link'
1208 @echo
' modules_prepare - Set up for building external modules'
1209 @echo
' tags/TAGS - Generate tags file for editors'
1210 @echo
' cscope - Generate cscope index'
1211 @echo
' kernelrelease - Output the release version string'
1212 @echo
' kernelversion - Output the version stored in Makefile'
1213 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1214 echo
' (default: $(INSTALL_HDR_PATH))'; \
1216 @echo
'Static analysers'
1217 @echo
' checkstack - Generate a list of stack hogs'
1218 @echo
' namespacecheck - Name space analysis on compiled kernel'
1219 @echo
' versioncheck - Sanity check on version.h usage'
1220 @echo
' includecheck - Check for duplicate included header files'
1221 @echo
' export_report - List the usages of all exported symbols'
1222 @echo
' headers_check - Sanity check on exported headers'
1223 @echo
' headerdep - Detect inclusion cycles in headers'
1224 @
$(MAKE
) -f
$(srctree
)/scripts
/Makefile.help checker-help
1226 @echo
'Kernel packaging:'
1227 @
$(MAKE
) $(build
)=$(package-dir
) help
1229 @echo
'Documentation targets:'
1230 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1232 @echo
'Architecture specific targets ($(SRCARCH)):'
1233 @
$(if
$(archhelp
),$(archhelp
),\
1234 echo
' No architecture specific help defined for $(SRCARCH)')
1237 $(foreach b
, $(boards
), \
1238 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1240 @
$(if
$(board-dirs
), \
1241 $(foreach b
, $(board-dirs
), \
1242 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1243 printf
" %-16s - Show all of the above\\n" help-boards
; \
1246 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1247 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1248 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1249 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1250 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1252 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1253 @echo
'For further info see the ./README file'
1256 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1258 help-boards
: $(help-board-dirs
)
1260 boards-per-dir
= $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
))
1262 $(help-board-dirs
): help-
%:
1263 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1264 @
$(if
$(boards-per-dir
), \
1265 $(foreach b
, $(boards-per-dir
), \
1266 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1270 # Documentation targets
1271 # ---------------------------------------------------------------------------
1272 %docs
: scripts_basic FORCE
1273 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1275 else # KBUILD_EXTMOD
1278 # External module support.
1279 # When building external modules the kernel used as basis is considered
1280 # read-only, and no consistency checks are made and the make
1281 # system is not used on the basis kernel. If updates are required
1282 # in the basis kernel ordinary make commands (without M=...) must
1285 # The following are the only valid targets when building external
1287 # make M=dir clean Delete all automatically generated files
1288 # make M=dir modules Make all modules in specified dir
1289 # make M=dir Same as 'make M=dir modules'
1290 # make M=dir modules_install
1291 # Install the modules built in the module directory
1292 # Assumes install directory is already created
1294 # We are always building modules
1296 PHONY
+= crmodverdir
1300 PHONY
+= $(objtree
)/Module.symvers
1301 $(objtree
)/Module.symvers
:
1302 @
test -e
$(objtree
)/Module.symvers ||
( \
1304 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1305 echo
" is missing; modules will have no dependencies and modversions."; \
1308 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1309 PHONY
+= $(module-dirs
) modules
1310 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1311 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1313 modules
: $(module-dirs
)
1314 @
$(kecho
) ' Building modules, stage 2.';
1315 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1317 PHONY
+= modules_install
1318 modules_install
: _emodinst_ _emodinst_post
1320 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1323 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1324 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1326 PHONY
+= _emodinst_post
1327 _emodinst_post
: _emodinst_
1330 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1332 PHONY
+= $(clean-dirs
) clean
1334 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1336 clean: rm-dirs
:= $(MODVERDIR
)
1337 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers \
1338 $(KBUILD_EXTMOD
)/modules.order \
1339 $(KBUILD_EXTMOD
)/modules.builtin
1340 clean: $(clean-dirs
)
1343 @find
$(KBUILD_EXTMOD
) $(RCS_FIND_IGNORE
) \
1344 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1345 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1346 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1349 @echo
' Building external modules.'
1350 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1352 @echo
' modules - default target, build the module(s)'
1353 @echo
' modules_install - install the module'
1354 @echo
' clean - remove generated files in module directory only'
1358 PHONY
+= prepare scripts
1361 endif # KBUILD_EXTMOD
1363 # Generate tags for editors
1364 # ---------------------------------------------------------------------------
1365 quiet_cmd_tags
= GEN
$@
1366 cmd_tags
= $(CONFIG_SHELL
) $(srctree
)/scripts
/tags.sh
$@
1368 tags TAGS cscope
: FORCE
1371 # Scripts to check various things for consistency
1372 # ---------------------------------------------------------------------------
1375 find
* $(RCS_FIND_IGNORE
) \
1376 -name
'*.[hcS]' -type f
-print |
sort \
1377 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1380 find
* $(RCS_FIND_IGNORE
) \
1381 -name
'*.[hcS]' -type f
-print |
sort \
1382 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1385 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/$@
1388 $(PERL
) $(srctree
)/scripts
/namespace.pl
1391 $(PERL
) $(srctree
)/scripts
/export_report.pl
1393 endif #ifeq ($(config-targets),1)
1394 endif #ifeq ($(mixed-targets),1)
1396 PHONY
+= checkstack kernelrelease kernelversion
1398 # UML needs a little special treatment here. It wants to use the host
1399 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1400 # else wants $(ARCH), including people doing cross-builds, which means
1401 # that $(SUBARCH) doesn't work here.
1403 CHECKSTACK_ARCH
:= $(SUBARCH
)
1405 CHECKSTACK_ARCH
:= $(ARCH
)
1408 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1409 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1411 kernelrelease
: include/config
/kernel.release
1412 @echo
$(KERNELRELEASE
)
1415 @echo
$(KERNELVERSION
)
1418 # ---------------------------------------------------------------------------
1419 # Single targets are compatible with:
1420 # - build with mixed source and output
1421 # - build with separate output dir 'make O=...'
1422 # - external modules
1424 # target-dir => where to store outputfile
1425 # build-dir => directory in kernel source tree to use
1427 ifeq ($(KBUILD_EXTMOD
),)
1428 build-dir
= $(patsubst %/,%,$(dir $@
))
1429 target-dir
= $(dir $@
)
1431 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1432 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1433 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1436 %.s
: %.c prepare scripts FORCE
1437 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1438 %.i
: %.c prepare scripts FORCE
1439 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1440 %.o
: %.c prepare scripts FORCE
1441 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1442 %.lst
: %.c prepare scripts FORCE
1443 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1444 %.s
: %.S prepare scripts FORCE
1445 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1446 %.o
: %.S prepare scripts FORCE
1447 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1448 %.symtypes
: %.c prepare scripts FORCE
1449 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1452 /: prepare scripts FORCE
1454 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1455 $(build
)=$(build-dir
)
1456 %/: prepare scripts FORCE
1458 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1459 $(build
)=$(build-dir
)
1460 %.ko
: prepare scripts FORCE
1462 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1463 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1464 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1466 # FIXME Should go into a make.lib or something
1467 # ===========================================================================
1469 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1470 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1472 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1473 cmd_rmfiles
= rm -f
$(rm-files
)
1475 # Run depmod only if we have System.map and depmod is executable
1476 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1478 if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then \
1479 $(DEPMOD
) -ae
-F System.map \
1480 $(if
$(strip $(INSTALL_MOD_PATH
)), -b
$(INSTALL_MOD_PATH
) ) \
1484 # Create temporary dir for module support files
1485 # clean it up only when building all modules
1486 cmd_crmodverdir
= $(Q
)mkdir
-p
$(MODVERDIR
) \
1487 $(if
$(KBUILD_MODULES
),; rm -f
$(MODVERDIR
)/*)
1489 a_flags
= -Wp
,-MD
,$(depfile
) $(KBUILD_AFLAGS
) $(AFLAGS_KERNEL
) \
1490 $(KBUILD_AFLAGS_KERNEL
) \
1491 $(NOSTDINC_FLAGS
) $(LINUXINCLUDE
) $(KBUILD_CPPFLAGS
) \
1492 $(modkern_aflags
) $(EXTRA_AFLAGS
) $(AFLAGS_
$(basetarget
).o
)
1494 quiet_cmd_as_o_S
= AS
$@
1495 cmd_as_o_S
= $(CC
) $(a_flags
) -c
-o
$@
$<
1497 # read all saved command lines
1499 targets
:= $(wildcard $(sort $(targets
)))
1500 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1502 ifneq ($(cmd_files
),)
1503 $(cmd_files
): ; # Do not try to update included dependency files
1504 include $(cmd_files
)
1507 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1509 # $(Q)$(MAKE) $(clean)=dir
1510 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1512 endif # skip-makefile
1517 # Declare the contents of the .PHONY variable as phony. We keep that
1518 # information in a variable so we can use it in if_changed and friends.