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 # We are using a recursive build, so we need to do a little thinking
20 # to get the ordering right.
22 # Most importantly: sub-Makefiles should only ever modify files in
23 # their own directory. If in some directory we have a dependency on
24 # a file in another dir (which doesn't happen often, but it's often
25 # unavoidable when linking the built-in.o targets which finally
26 # turn into vmlinux), we will call a sub make in that other dir, and
27 # after that we are sure that everything which is in that other dir
30 # The only cases where we need to modify files which have global
31 # effects are thus separated out and done before the recursive
32 # descending is started. They are now explicitly listed as the
35 # To put more focus on warnings, be less verbose as default
36 # Use 'make V=1' to see the full commands
38 ifeq ("$(origin V)", "command line")
45 # Call a source code checker (by default, "sparse") as part of the
48 # Use 'make C=1' to enable checking of only re-compiled files.
49 # Use 'make C=2' to enable checking of *all* source files, regardless
50 # of whether they are re-compiled or not.
52 # See the file "Documentation/sparse.txt" for more details, including
53 # where to get the "sparse" utility.
55 ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC
= $(C
)
58 ifndef KBUILD_CHECKSRC
62 # Use make M=dir to specify directory of external module to build
63 # Old syntax make ... SUBDIRS=$PWD is still supported
64 # Setting the environment variable KBUILD_EXTMOD take precedence
66 KBUILD_EXTMOD ?
= $(SUBDIRS
)
69 ifeq ("$(origin M)", "command line")
73 # kbuild supports saving output files in a separate directory.
74 # To locate output files in a separate directory two syntaxes are supported.
75 # In both cases the working directory must be the root of the kernel src.
77 # Use "make O=dir/to/store/output/files/"
79 # 2) Set KBUILD_OUTPUT
80 # Set the environment variable KBUILD_OUTPUT to point to the directory
81 # where the output files shall be placed.
82 # export KBUILD_OUTPUT=dir/to/store/output/files/
85 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
89 # KBUILD_SRC is set on invocation of make in OBJ directory
90 # KBUILD_SRC is not intended to be used by the regular user (for now)
93 # OK, Make called in directory where kernel src resides
94 # Do we want to locate output files in a separate directory?
95 ifeq ("$(origin O)", "command line")
99 # That's our default target when none is given on the command line
103 # Cancel implicit rules on top Makefile
104 $(CURDIR
)/Makefile Makefile
: ;
106 ifneq ($(KBUILD_OUTPUT
),)
107 # Invoke a second make in the output directory, passing relevant variables
108 # check that the output directory actually exists
109 saved-output
:= $(KBUILD_OUTPUT
)
110 KBUILD_OUTPUT
:= $(shell cd
$(KBUILD_OUTPUT
) && /bin
/pwd
)
111 $(if
$(KBUILD_OUTPUT
),, \
112 $(error output directory
"$(saved-output)" does not exist
))
114 PHONY
+= $(MAKECMDGOALS
) sub-make
116 $(filter-out _all sub-make
$(CURDIR
)/Makefile
, $(MAKECMDGOALS
)) _all
: sub-make
120 $(if
$(KBUILD_VERBOSE
:1=),@
)$(MAKE
) -C
$(KBUILD_OUTPUT
) \
121 KBUILD_SRC
=$(CURDIR
) \
122 KBUILD_EXTMOD
="$(KBUILD_EXTMOD)" -f
$(CURDIR
)/Makefile \
123 $(filter-out _all sub-make
,$(MAKECMDGOALS
))
125 # Leave processing to above invocation of make
127 endif # ifneq ($(KBUILD_OUTPUT),)
128 endif # ifeq ($(KBUILD_SRC),)
130 # We process the rest of the Makefile if this is the final invocation of make
131 ifeq ($(skip-makefile
),)
133 # If building an external module we do not care about the all: rule
134 # but instead _all depend on modules
136 ifeq ($(KBUILD_EXTMOD
),)
142 srctree
:= $(if
$(KBUILD_SRC
),$(KBUILD_SRC
),$(CURDIR
))
147 VPATH
:= $(srctree
)$(if
$(KBUILD_EXTMOD
),:$(KBUILD_EXTMOD
))
149 export srctree objtree VPATH
152 # SUBARCH tells the usermode build what the underlying arch is. That is set
153 # first, and if a usermode build is happening, the "ARCH=um" on the command
154 # line overrides the setting of ARCH below. If a native build is happening,
155 # then ARCH is assigned, getting whatever value it gets normally, and
156 # SUBARCH is subsequently ignored.
158 SUBARCH
:= $(shell uname
-m | sed
-e s
/i
.86/i386
/ -e s
/sun4u
/sparc64
/ \
159 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
160 -e s
/s390x
/s390
/ -e s
/parisc64
/parisc
/ \
161 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
164 # Cross compiling and selecting different set of gcc/bin-utils
165 # ---------------------------------------------------------------------------
167 # When performing cross compilation for other architectures ARCH shall be set
168 # to the target architecture. (See arch/* for the possibilities).
169 # ARCH can be set during invocation of make:
171 # Another way is to have ARCH set in the environment.
172 # The default ARCH is the host where make is executed.
174 # CROSS_COMPILE specify the prefix used for all executables used
175 # during compilation. Only gcc and related bin-utils executables
176 # are prefixed with $(CROSS_COMPILE).
177 # CROSS_COMPILE can be set on the command line
178 # make CROSS_COMPILE=ia64-linux-
179 # Alternatively CROSS_COMPILE can be set in the environment.
180 # Default value for CROSS_COMPILE is not to prefix executables
181 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
182 export KBUILD_BUILDHOST
:= $(SUBARCH
)
186 # Architecture as present in compile.h
187 UTS_MACHINE
:= $(ARCH
)
190 # Additional ARCH settings for x86
194 ifeq ($(ARCH
),x86_64
)
198 # Additional ARCH settings for sparc
199 ifeq ($(ARCH
),sparc64
)
203 # Additional ARCH settings for sh
208 # Where to locate arch specific headers
209 hdr-arch
:= $(SRCARCH
)
211 ifeq ($(ARCH
),m68knommu
)
215 KCONFIG_CONFIG ?
= .config
217 # SHELL used by kbuild
218 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
219 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
220 else echo sh
; fi
; fi
)
224 HOSTCFLAGS
= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2
-fomit-frame-pointer
227 # Decide whether to build built-in, modular, or both.
228 # Normally, just do built-in.
233 # If we have only "make modules", don't compile built-in objects.
234 # When we're building modules with modversions, we need to consider
235 # the built-in objects during the descend as well, in order to
236 # make sure the checksums are up to date before we record them.
238 ifeq ($(MAKECMDGOALS
),modules
)
239 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
242 # If we have "make <whatever> modules", compile modules
243 # in addition to whatever we do anyway.
244 # Just "make" or "make all" shall build modules as well
246 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
250 ifeq ($(MAKECMDGOALS
),)
254 export KBUILD_MODULES KBUILD_BUILTIN
255 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
258 # ---------------------------------------------------------------------------
260 # Normally, we echo the whole command before executing it. By making
261 # that echo $($(quiet)$(cmd)), we now have the possibility to set
262 # $(quiet) to choose other forms of output instead, e.g.
264 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
265 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
267 # If $(quiet) is empty, the whole command will be printed.
268 # If it is set to "quiet_", only the short version will be printed.
269 # If it is set to "silent_", nothing will be printed at all, since
270 # the variable $(silent_cmd_cc_o_c) doesn't exist.
272 # A simple variant is to prefix commands with $(Q) - that's useful
273 # for commands that shall be hidden in non-verbose mode.
277 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
278 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
280 ifeq ($(KBUILD_VERBOSE
),1)
288 # If the user is running make -s (silent mode), suppress echoing of
291 ifneq ($(findstring s
,$(MAKEFLAGS
)),)
295 export quiet Q KBUILD_VERBOSE
298 # Look for make include files relative to root of kernel src
299 MAKEFLAGS
+= --include-dir
=$(srctree
)
301 # We need some generic definitions (do not try to remake the file).
302 $(srctree
)/scripts
/Kbuild.
include: ;
303 include $(srctree
)/scripts
/Kbuild.
include
305 # Make variables (CC, etc...)
307 AS
= $(CROSS_COMPILE
)as
308 LD
= $(CROSS_COMPILE
)ld
309 CC
= $(CROSS_COMPILE
)gcc
311 AR
= $(CROSS_COMPILE
)ar
312 NM
= $(CROSS_COMPILE
)nm
313 STRIP
= $(CROSS_COMPILE
)strip
314 OBJCOPY
= $(CROSS_COMPILE
)objcopy
315 OBJDUMP
= $(CROSS_COMPILE
)objdump
317 GENKSYMS
= scripts
/genksyms
/genksyms
318 INSTALLKERNEL
:= installkernel
319 DEPMOD
= /sbin
/depmod
320 KALLSYMS
= scripts
/kallsyms
324 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
325 -Wbitwise
-Wno-return-void
$(CF
)
327 CFLAGS_MODULE
= $(MODFLAGS
)
328 AFLAGS_MODULE
= $(MODFLAGS
)
329 LDFLAGS_MODULE
= -T
$(srctree
)/scripts
/module-common.lds
332 CFLAGS_GCOV
= -fprofile-arcs
-ftest-coverage
335 # Use LINUXINCLUDE when you must reference the include/ directory.
336 # Needed to be compatible with the O= option
337 LINUXINCLUDE
:= -I
$(srctree
)/arch
/$(hdr-arch
)/include -Iinclude \
338 $(if
$(KBUILD_SRC
), -I
$(srctree
)/include) \
339 -include include/generated
/autoconf.h
341 KBUILD_CPPFLAGS
:= -D__KERNEL__
343 KBUILD_CFLAGS
:= -Wall
-Wundef
-Wstrict-prototypes
-Wno-trigraphs \
344 -fno-strict-aliasing
-fno-common \
345 -Werror-implicit-function-declaration \
346 -Wno-format-security \
347 -fno-delete-null-pointer-checks
348 KBUILD_AFLAGS
:= -D__ASSEMBLY__
350 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
351 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
352 KERNELVERSION
= $(VERSION
).
$(PATCHLEVEL
).
$(SUBLEVEL
)$(EXTRAVERSION
)
354 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
355 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
356 export CPP AR NM STRIP OBJCOPY OBJDUMP
357 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
358 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
360 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
361 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
362 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
364 # When compiling out-of-tree modules, put MODVERDIR in the module
365 # tree rather than in the kernel tree. The kernel tree might
367 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
369 # Files to ignore in find ... statements
371 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
372 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn
--exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
374 # ===========================================================================
375 # Rules shared between *config targets and build targets
377 # Basic helpers built in scripts/
378 PHONY
+= scripts_basic
380 $(Q
)$(MAKE
) $(build
)=scripts
/basic
381 $(Q
)rm -f .tmp_quiet_recordmcount
383 # To avoid any implicit rule to kick in, define an empty command.
384 scripts
/basic
/%: scripts_basic
;
386 PHONY
+= outputmakefile
387 # outputmakefile generates a Makefile in the output directory, if using a
388 # separate output directory. This allows convenient use of make in the
391 ifneq ($(KBUILD_SRC
),)
392 $(Q
)ln
-fsn
$(srctree
) source
393 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile \
394 $(srctree
) $(objtree
) $(VERSION
) $(PATCHLEVEL
)
397 # To make sure we do not include .config for any of the *config targets
398 # catch them early, and hand them over to scripts/kconfig/Makefile
399 # It is allowed to specify more targets when calling make, including
400 # mixing *config targets and build targets.
401 # For example 'make oldconfig all'.
402 # Detect when mixed targets is specified, and make a second invocation
403 # of make so .config is not included in this case either (for *config).
405 no-dot-config-targets
:= clean mrproper
distclean \
406 cscope TAGS
tags help
%docs
check% \
407 include/linux
/version.h headers_
% \
408 kernelrelease kernelversion
414 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
415 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
420 ifeq ($(KBUILD_EXTMOD
),)
421 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
423 ifneq ($(filter-out config
%config
,$(MAKECMDGOALS
)),)
429 ifeq ($(mixed-targets
),1)
430 # ===========================================================================
431 # We're called with mixed targets (*config and build targets).
432 # Handle them one by one.
435 $(Q
)$(MAKE
) -C
$(srctree
) KBUILD_SRC
= $@
438 ifeq ($(config-targets
),1)
439 # ===========================================================================
440 # *config targets only - make sure prerequisites are updated, and descend
441 # in scripts/kconfig to make the *config target
443 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
444 # KBUILD_DEFCONFIG may point out an alternative default configuration
445 # used for 'make defconfig'
446 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
447 export KBUILD_DEFCONFIG KBUILD_KCONFIG
449 config
: scripts_basic outputmakefile FORCE
450 $(Q
)mkdir
-p
include/linux
include/config
451 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
453 %config
: scripts_basic outputmakefile FORCE
454 $(Q
)mkdir
-p
include/linux
include/config
455 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
458 # ===========================================================================
459 # Build targets only - this includes vmlinux, arch specific targets, clean
460 # targets and others. In general all targets except *config targets.
462 ifeq ($(KBUILD_EXTMOD
),)
463 # Additional helpers built in scripts/
464 # Carefully list dependencies so we do not try to build scripts twice
467 scripts
: scripts_basic
include/config
/auto.conf
468 $(Q
)$(MAKE
) $(build
)=$(@
)
470 # Objects we will link into vmlinux / subdirs we need to visit
472 drivers-y
:= drivers
/ sound
/ firmware
/
476 endif # KBUILD_EXTMOD
478 ifeq ($(dot-config
),1)
480 -include include/config
/auto.conf
482 ifeq ($(KBUILD_EXTMOD
),)
483 # Read in dependencies to all Kconfig* files, make sure to run
484 # oldconfig if changes are detected.
485 -include include/config
/auto.conf.cmd
487 # To avoid any implicit rule to kick in, define an empty command
488 $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
: ;
490 # If .config is newer than include/config/auto.conf, someone tinkered
491 # with it and forgot to run make oldconfig.
492 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
493 # we execute the config step to be sure to catch updated Kconfig files
494 include/config
/auto.conf
: $(KCONFIG_CONFIG
) include/config
/auto.conf.cmd
495 $(Q
)mkdir
-p
include/generated
496 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile silentoldconfig
498 # external modules needs include/generated/autoconf.h and include/config/auto.conf
499 # but do not care if they are up-to-date. Use auto.conf to trigger the test
500 PHONY
+= include/config
/auto.conf
502 include/config
/auto.conf
:
503 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
505 echo
" ERROR: Kernel configuration is invalid."; \
506 echo
" include/generated/autoconf.h or $@ are missing.";\
507 echo
" Run 'make oldconfig && make prepare' on kernel src to fix it."; \
511 endif # KBUILD_EXTMOD
514 # Dummy target needed, because used as prerequisite
515 include/config
/auto.conf
: ;
516 endif # $(dot-config)
518 # The all: target is the default when no target is given on the
520 # This allow a user to issue only 'make' to build a kernel including modules
521 # Defaults vmlinux but it is usually overridden in the arch makefile
524 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
530 include $(srctree
)/arch
/$(SRCARCH
)/Makefile
532 ifneq ($(CONFIG_FRAME_WARN
),0)
533 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
536 # Force gcc to behave correct even for buggy distributions
537 ifndef CONFIG_CC_STACKPROTECTOR
538 KBUILD_CFLAGS
+= $(call cc-option
, -fno-stack-protector
)
541 ifdef CONFIG_FRAME_POINTER
542 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
544 KBUILD_CFLAGS
+= -fomit-frame-pointer
547 ifdef CONFIG_DEBUG_INFO
549 KBUILD_AFLAGS
+= -gdwarf-2
552 ifdef CONFIG_FUNCTION_TRACER
556 # We trigger additional mismatches with less inlining
557 ifdef CONFIG_DEBUG_SECTION_MISMATCH
558 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
561 # arch Makefile may override CC so keep this after arch Makefile is included
562 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
563 CHECKFLAGS
+= $(NOSTDINC_FLAGS
)
565 # warn about C99 declaration after statement
566 KBUILD_CFLAGS
+= $(call cc-option
,-Wdeclaration-after-statement
,)
568 # disable pointer signed / unsigned warnings in gcc 4.0
569 KBUILD_CFLAGS
+= $(call cc-option
,-Wno-pointer-sign
,)
571 # disable invalid "can't wrap" optimizations for signed / pointers
572 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
574 # revert to pre-gcc-4.4 behaviour of .eh_frame
575 KBUILD_CFLAGS
+= $(call cc-option
,-fno-dwarf2-cfi-asm
)
577 # conserve stack if available
578 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
580 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
581 # But warn user when we do so
583 $(warning
"WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
585 ifneq ($(KCPPFLAGS
),)
586 $(call warn-assign
,CPPFLAGS
)
587 KBUILD_CPPFLAGS
+= $(KCPPFLAGS
)
590 $(call warn-assign
,AFLAGS
)
591 KBUILD_AFLAGS
+= $(KAFLAGS
)
594 $(call warn-assign
,CFLAGS
)
595 KBUILD_CFLAGS
+= $(KCFLAGS
)
598 # Use --build-id when available.
599 LDFLAGS_BUILD_ID
= $(patsubst -Wl
$(comma
)%,%,\
600 $(call cc-ldoption
, -Wl
$(comma
)--build-id
,))
601 LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
602 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
604 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
605 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
608 # Default kernel image to build when no specific target is given.
609 # KBUILD_IMAGE may be overruled on the command line or
610 # set in the environment
611 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
613 export KBUILD_IMAGE ?
= vmlinux
616 # INSTALL_PATH specifies where to place the updated kernel and system map
617 # images. Default is /boot, but you can set it to other values
618 export INSTALL_PATH ?
= /boot
621 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
622 # relocations required by build roots. This is not defined in the
623 # makefile but the argument can be passed to make if needed.
626 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
630 # INSTALL_MOD_STRIP, if defined, will cause modules to be
631 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
632 # the default option --strip-debug will be used. Otherwise,
633 # INSTALL_MOD_STRIP will used as the options to the strip command.
635 ifdef INSTALL_MOD_STRIP
636 ifeq ($(INSTALL_MOD_STRIP
),1)
637 mod_strip_cmd
= $(STRIP
) --strip-debug
639 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
640 endif # INSTALL_MOD_STRIP=1
643 endif # INSTALL_MOD_STRIP
647 ifeq ($(KBUILD_EXTMOD
),)
648 core-y
+= kernel
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
650 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
651 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
652 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
)))
654 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
656 $(core-n
) $(core-
) $(drivers-n
) $(drivers-
) \
657 $(net-n
) $(net-
) $(libs-n
) $(libs-
))))
659 init-y
:= $(patsubst %/, %/built-in.o
, $(init-y
))
660 core-y
:= $(patsubst %/, %/built-in.o
, $(core-y
))
661 drivers-y
:= $(patsubst %/, %/built-in.o
, $(drivers-y
))
662 net-y
:= $(patsubst %/, %/built-in.o
, $(net-y
))
663 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
664 libs-y2
:= $(patsubst %/, %/built-in.o
, $(libs-y
))
665 libs-y
:= $(libs-y1
) $(libs-y2
)
668 # ---------------------------------------------------------------------------
669 # vmlinux is built from the objects selected by $(vmlinux-init) and
670 # $(vmlinux-main). Most are built-in.o files from top-level directories
671 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
672 # Ordering when linking is important, and $(vmlinux-init) must be first.
677 # +-< $(vmlinux-init)
678 # | +--< init/version.o + more
680 # +--< $(vmlinux-main)
681 # | +--< driver/built-in.o mm/built-in.o + more
683 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
685 # vmlinux version (uname -v) cannot be updated during normal
686 # descending-into-subdirs phase since we do not yet know if we need to
688 # Therefore this step is delayed until just before final link of vmlinux -
689 # except in the kallsyms case where it is done just before adding the
690 # symbols to the kernel.
692 # System.map is generated to document addresses of all kernel symbols
694 vmlinux-init
:= $(head-y
) $(init-y
)
695 vmlinux-main
:= $(core-y
) $(libs-y
) $(drivers-y
) $(net-y
)
696 vmlinux-all
:= $(vmlinux-init
) $(vmlinux-main
)
697 vmlinux-lds
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
698 export KBUILD_VMLINUX_OBJS
:= $(vmlinux-all
)
700 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
701 # May be overridden by arch/$(ARCH)/Makefile
702 quiet_cmd_vmlinux__ ?
= LD
$@
703 cmd_vmlinux__ ?
= $(LD
) $(LDFLAGS
) $(LDFLAGS_vmlinux
) -o
$@ \
704 -T
$(vmlinux-lds
) $(vmlinux-init
) \
705 --start-group
$(vmlinux-main
) --end-group \
706 $(filter-out $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) vmlinux.o FORCE
,$^
)
708 # Generate new vmlinux version
709 quiet_cmd_vmlinux_version
= GEN .version
710 cmd_vmlinux_version
= set
-e
; \
711 if
[ ! -r .version
]; then \
715 mv .version .old_version
; \
716 expr
0$$(cat .old_version
) + 1 >.version
; \
718 $(MAKE
) $(build
)=init
720 # Generate System.map
721 quiet_cmd_sysmap
= SYSMAP
722 cmd_sysmap
= $(CONFIG_SHELL
) $(srctree
)/scripts
/mksysmap
725 # If CONFIG_KALLSYMS is set .version is already updated
726 # Generate System.map and verify that the content is consistent
727 # Use + in front of the vmlinux_version rule to silent warning with make -j2
728 # First command is ':' to allow us to use + in front of the rule
729 define rule_vmlinux__
731 $(if
$(CONFIG_KALLSYMS
),,+$(call cmd
,vmlinux_version
))
733 $(call cmd
,vmlinux__
)
734 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
736 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
737 echo
' $($(quiet)cmd_sysmap) System.map' &&) \
738 $(cmd_sysmap
) $@ System.map
; \
739 if
[ $$?
-ne
0 ]; then \
747 ifdef CONFIG_KALLSYMS
748 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
749 # It's a three stage process:
750 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
752 # Running kallsyms on that gives us .tmp_kallsyms1.o with
753 # the right size - vmlinux version (uname -v) is updated during this step
754 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
755 # but due to the added section, some addresses have shifted.
756 # From here, we generate a correct .tmp_kallsyms2.o
757 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
758 # o Verify that the System.map from vmlinux matches the map from
759 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
760 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
761 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
762 # temporary bypass to allow the kernel to be built while the
763 # maintainers work out what went wrong with kallsyms.
765 ifdef CONFIG_KALLSYMS_EXTRA_PASS
771 kallsyms.o
:= .tmp_kallsyms
$(last_kallsyms
).o
773 define verify_kallsyms
774 $(Q
)$(if
$($(quiet
)cmd_sysmap
), \
775 echo
' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
776 $(cmd_sysmap
) .tmp_vmlinux
$(last_kallsyms
) .tmp_System.map
777 $(Q
)cmp
-s System.map .tmp_System.map || \
778 (echo Inconsistent kallsyms data
; \
779 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS
; \
780 rm .tmp_kallsyms
* ; /bin
/false
)
783 # Update vmlinux version before link
784 # Use + in front of this rule to silent warning about make -j1
785 # First command is ':' to allow us to use + in front of this rule
786 cmd_ksym_ld
= $(cmd_vmlinux__
)
789 +$(call cmd
,vmlinux_version
)
790 $(call cmd
,vmlinux__
)
791 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux__)' > $(@D
)/.
$(@F
).cmd
794 # Generate .S file with all kernel symbols
795 quiet_cmd_kallsyms
= KSYM
$@
796 cmd_kallsyms
= $(NM
) -n
$< |
$(KALLSYMS
) \
797 $(if
$(CONFIG_KALLSYMS_ALL
),--all-symbols
) > $@
799 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o
: %.o
: %.S scripts FORCE
800 $(call if_changed_dep
,as_o_S
)
802 .tmp_kallsyms
%.S
: .tmp_vmlinux
% $(KALLSYMS
)
805 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
806 .tmp_vmlinux1
: $(vmlinux-lds
) $(vmlinux-all
) FORCE
807 $(call if_changed_rule
,ksym_ld
)
809 .tmp_vmlinux2
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms1.o FORCE
810 $(call if_changed
,vmlinux__
)
812 .tmp_vmlinux3
: $(vmlinux-lds
) $(vmlinux-all
) .tmp_kallsyms2.o FORCE
813 $(call if_changed
,vmlinux__
)
815 # Needs to visit scripts/ before $(KALLSYMS) can be used.
816 $(KALLSYMS
): scripts
;
818 # Generate some data for debugging strange kallsyms problems
819 debug_kallsyms
: .tmp_map
$(last_kallsyms
)
821 .tmp_map
%: .tmp_vmlinux
% FORCE
822 ($(OBJDUMP
) -h
$< |
$(AWK
) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM
) $<) |
sort > $@
828 endif # ifdef CONFIG_KALLSYMS
830 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
831 # relevant sections renamed as per the linker script.
832 quiet_cmd_vmlinux-modpost
= LD
$@
833 cmd_vmlinux-modpost
= $(LD
) $(LDFLAGS
) -r
-o
$@ \
834 $(vmlinux-init
) --start-group
$(vmlinux-main
) --end-group \
835 $(filter-out $(vmlinux-init
) $(vmlinux-main
) FORCE
,$^
)
836 define rule_vmlinux-modpost
838 +$(call cmd
,vmlinux-modpost
)
839 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
$@
840 $(Q
)echo
'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target
).cmd
843 # vmlinux image - including updated kernel symbols
844 vmlinux
: $(vmlinux-lds
) $(vmlinux-init
) $(vmlinux-main
) vmlinux.o
$(kallsyms.o
) FORCE
845 ifdef CONFIG_HEADERS_CHECK
846 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile headers_check
849 $(Q
)$(MAKE
) $(build
)=samples
851 ifdef CONFIG_BUILD_DOCSRC
852 $(Q
)$(MAKE
) $(build
)=Documentation
854 $(call vmlinux-modpost
)
855 $(call if_changed_rule
,vmlinux__
)
856 $(Q
)rm -f .old_version
858 # build vmlinux.o first to catch section mismatch errors early
859 ifdef CONFIG_KALLSYMS
860 .tmp_vmlinux1
: vmlinux.o
863 modpost-init
:= $(filter-out init
/built-in.o
, $(vmlinux-init
))
864 vmlinux.o
: $(modpost-init
) $(vmlinux-main
) FORCE
865 $(call if_changed_rule
,vmlinux-modpost
)
867 # The actual objects are generated when descending,
868 # make sure no implicit rule kicks in
869 $(sort $(vmlinux-init
) $(vmlinux-main
)) $(vmlinux-lds
): $(vmlinux-dirs
) ;
871 # Handle descending into subdirectories listed in $(vmlinux-dirs)
872 # Preset locale variables to speed up the build process. Limit locale
873 # tweaks to this spot to avoid wrong language settings when running
874 # make menuconfig etc.
875 # Error messages still appears in the original language
877 PHONY
+= $(vmlinux-dirs
)
878 $(vmlinux-dirs
): prepare scripts
879 $(Q
)$(MAKE
) $(build
)=$@
881 # Build the kernel release string
883 # The KERNELRELEASE value built here is stored in the file
884 # include/config/kernel.release, and is used when executing several
885 # make targets, such as "make install" or "make modules_install."
887 # The eventual kernel release string consists of the following fields,
888 # shown in a hierarchical format to show how smaller parts are concatenated
889 # to form the larger and final value, with values coming from places like
890 # the Makefile, kernel config options, make command line options and/or
891 # SCM tag information.
895 # $(PATCHLEVEL) eg, 6
897 # $(EXTRAVERSION) eg, -rc6
900 # localversion* (files without backups, containing '~')
901 # $(CONFIG_LOCALVERSION) (from kernel config setting)
902 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
903 # ./scripts/setlocalversion (SCM tag, if one exists)
904 # $(LOCALVERSION) (from make command line if provided)
906 # Note how the final $(localver-auto) string is included *only* if the
907 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
908 # moment, only git is supported but other SCMs can edit the script
909 # scripts/setlocalversion and add the appropriate checks as needed.
911 pattern
= ".*/localversion[^~]*"
912 string
= $(shell cat
/dev
/null \
913 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
915 localver
= $(subst $(space
),, $(string
) \
916 $(patsubst "%",%,$(CONFIG_LOCALVERSION
)))
918 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
919 # and if the SCM is know a tag from the SCM is appended.
920 # The appended tag is determined by the SCM used.
922 # .scmversion is used when generating rpm packages so we do not loose
923 # the version information from the SCM when we do the build of the kernel
924 # from the copied source
925 ifdef CONFIG_LOCALVERSION_AUTO
927 ifeq ($(wildcard .scmversion
),)
928 _localver-auto
= $(shell $(CONFIG_SHELL
) \
929 $(srctree
)/scripts
/setlocalversion
$(srctree
))
931 _localver-auto
= $(shell cat .scmversion
2> /dev
/null
)
934 localver-auto
= $(LOCALVERSION
)$(_localver-auto
)
937 localver-full
= $(localver
)$(localver-auto
)
939 # Store (new) KERNELRELASE string in include/config/kernel.release
940 kernelrelease
= $(KERNELVERSION
)$(localver-full
)
941 include/config
/kernel.release
: include/config
/auto.conf FORCE
943 $(Q
)echo
$(kernelrelease
) > $@
946 # Things we need to do before we recursively start building the kernel
947 # or the modules are listed in "prepare".
948 # A multi level approach is used. prepareN is processed before prepareN-1.
949 # archprepare is used in arch Makefiles and when processed asm symlink,
950 # version.h and scripts_basic is processed / created.
952 # Listed in dependency order
953 PHONY
+= prepare archprepare prepare0 prepare1 prepare2 prepare3
955 # prepare3 is used to check if we are building in a separate output directory,
957 # 1) Check that make has not been executed in the kernel src $(srctree)
958 prepare3
: include/config
/kernel.release
959 ifneq ($(KBUILD_SRC
),)
960 @
$(kecho
) ' Using $(srctree) as source for kernel'
961 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
962 echo
" $(srctree) is not clean, please run 'make mrproper'";\
963 echo
" in the '$(srctree)' directory.";\
968 # prepare2 creates a makefile if using a separate output directory
969 prepare2
: prepare3 outputmakefile
971 prepare1
: prepare2
include/linux
/version.h
include/generated
/utsrelease.h \
972 include/config
/auto.conf
975 archprepare
: prepare1 scripts_basic
977 prepare0
: archprepare FORCE
978 $(Q
)$(MAKE
) $(build
)=.
979 $(Q
)$(MAKE
) $(build
)=. missing-syscalls
981 # All the preparing..
984 # Generate some files
985 # ---------------------------------------------------------------------------
987 # KERNELRELEASE can change from a few different places, meaning version.h
988 # needs to be updated, so this check is forced on all builds
991 define filechk_utsrelease.h
992 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
993 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
996 (echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\";)
999 define filechk_version.h
1000 (echo \
#define LINUX_VERSION_CODE $(shell \
1001 expr
$(VERSION
) \
* 65536 + $(PATCHLEVEL
) \
* 256 + $(SUBLEVEL
)); \
1002 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1005 include/linux
/version.h
: $(srctree
)/Makefile FORCE
1006 $(call filechk
,version.h
)
1008 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
1009 $(call filechk
,utsrelease.h
)
1013 $(Q
)find
include/ -name
'*.h' | xargs
--max-args
1 scripts
/headerdep.pl
1015 # ---------------------------------------------------------------------------
1019 @echo
'*** Warning: make $@ is unnecessary now.'
1021 # ---------------------------------------------------------------------------
1023 INSTALL_FW_PATH
=$(INSTALL_MOD_PATH
)/lib
/firmware
1024 export INSTALL_FW_PATH
1026 PHONY
+= firmware_install
1027 firmware_install
: FORCE
1028 @mkdir
-p
$(objtree
)/firmware
1029 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_install
1031 # ---------------------------------------------------------------------------
1034 #Default location for installed headers
1035 export INSTALL_HDR_PATH
= $(objtree
)/usr
1037 hdr-inst
:= -rR
-f
$(srctree
)/scripts
/Makefile.headersinst obj
1039 # If we do an all arch process set dst to asm-$(hdr-arch)
1040 hdr-dst
= $(if
$(KBUILD_HEADERS
), dst
=include/asm-
$(hdr-arch
), dst
=include/asm
)
1043 __headers
: include/linux
/version.h scripts_basic FORCE
1044 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
1046 PHONY
+= headers_install_all
1047 headers_install_all
:
1048 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
install
1050 PHONY
+= headers_install
1051 headers_install
: __headers
1052 $(if
$(wildcard $(srctree
)/arch
/$(hdr-arch
)/include/asm
/Kbuild
),, \
1053 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
1054 $(Q
)$(MAKE
) $(hdr-inst
)=include
1055 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/asm
$(hdr-dst
)
1057 PHONY
+= headers_check_all
1058 headers_check_all
: headers_install_all
1059 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
check
1061 PHONY
+= headers_check
1062 headers_check
: headers_install
1063 $(Q
)$(MAKE
) $(hdr-inst
)=include HDRCHECK
=1
1064 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(hdr-arch
)/include/asm
$(hdr-dst
) HDRCHECK
=1
1066 # ---------------------------------------------------------------------------
1069 ifdef CONFIG_MODULES
1071 # By default, build modules as well
1077 # A module can be listed more than once in obj-m resulting in
1078 # duplicate lines in modules.order files. Those are removed
1079 # using awk while concatenating to the final file.
1082 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
)
1083 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.order
) > $(objtree
)/modules.order
1084 @
$(kecho
) ' Building modules, stage 2.';
1085 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1086 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modbuild
1089 # Target to prepare building external modules
1090 PHONY
+= modules_prepare
1091 modules_prepare
: prepare scripts
1093 # Target to install modules
1094 PHONY
+= modules_install
1095 modules_install
: _modinst_ _modinst_post
1099 @if
[ -z
"`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1100 echo
"Warning: you may need to install module-init-tools"; \
1101 echo
"See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1104 @
rm -rf
$(MODLIB
)/kernel
1105 @
rm -f
$(MODLIB
)/source
1106 @mkdir
-p
$(MODLIB
)/kernel
1107 @ln
-s
$(srctree
) $(MODLIB
)/source
1108 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1109 rm -f
$(MODLIB
)/build
; \
1110 ln
-s
$(objtree
) $(MODLIB
)/build
; \
1112 @cp
-f
$(objtree
)/modules.order
$(MODLIB
)/
1113 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1115 # This depmod is only for convenience to give the initial
1116 # boot a modules.dep even before / is mounted read-write. However the
1117 # boot script depmod is the master version.
1118 PHONY
+= _modinst_post
1119 _modinst_post
: _modinst_
1120 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.fwinst obj
=firmware __fw_modinst
1123 else # CONFIG_MODULES
1125 # Modules not configured
1126 # ---------------------------------------------------------------------------
1128 modules modules_install
: FORCE
1130 @echo
"The present kernel configuration has modules disabled."
1131 @echo
"Type 'make config' and enable loadable module support."
1132 @echo
"Then build a kernel with module support enabled."
1136 endif # CONFIG_MODULES
1139 # Cleaning is done on three levels.
1140 # make clean Delete most generated files
1141 # Leave enough to build external modules
1142 # make mrproper Delete the current configuration, and all generated files
1143 # make distclean Remove editor backup files, patch leftover files and the like
1145 # Directories & files removed with 'make clean'
1146 CLEAN_DIRS
+= $(MODVERDIR
)
1147 CLEAN_FILES
+= vmlinux System.map \
1148 .tmp_kallsyms
* .tmp_version .tmp_vmlinux
* .tmp_System.map
1150 # Directories & files removed with 'make mrproper'
1151 MRPROPER_DIRS
+= include/config usr
/include include/generated
1152 MRPROPER_FILES
+= .config .config.old .version .old_version \
1153 include/linux
/version.h \
1154 Module.symvers Module.markers
tags TAGS cscope
*
1156 # clean - Delete most, but leave enough to build external modules
1158 clean: rm-dirs
:= $(CLEAN_DIRS
)
1159 clean: rm-files
:= $(CLEAN_FILES
)
1160 clean-dirs
:= $(addprefix _clean_
,$(srctree
) $(vmlinux-alldirs
) Documentation
)
1162 PHONY
+= $(clean-dirs
) clean archclean
1164 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1166 clean: archclean
$(clean-dirs
)
1169 @find .
$(RCS_FIND_IGNORE
) \
1170 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1171 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1172 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1173 -o
-name
'Module.markers' -o
-name
'.tmp_*.o.*' \
1174 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1176 # mrproper - Delete all generated files, including .config
1178 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1179 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1180 mrproper-dirs
:= $(addprefix _mrproper_
,Documentation
/DocBook scripts
)
1182 PHONY
+= $(mrproper-dirs
) mrproper archmrproper
1184 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1186 mrproper
: clean archmrproper
$(mrproper-dirs
)
1195 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1196 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1197 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'.*.orig' \
1198 -o
-name
'.*.rej' -o
-size
0 \
1199 -o
-name
'*%' -o
-name
'.*.cmd' -o
-name
'core' \
) \
1200 -type f
-print | xargs
rm -f
1203 # Packaging of the kernel to various formats
1204 # ---------------------------------------------------------------------------
1205 # rpm target kept for backward compatibility
1206 package-dir
:= $(srctree
)/scripts
/package
1208 %pkg
: include/config
/kernel.release FORCE
1209 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1210 rpm
: include/config
/kernel.release FORCE
1211 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1214 # Brief documentation of the typical targets used
1215 # ---------------------------------------------------------------------------
1217 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1218 boards
:= $(notdir $(boards
))
1219 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1220 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1223 @echo
'Cleaning targets:'
1224 @echo
' clean - Remove most generated files but keep the config and'
1225 @echo
' enough build support to build external modules'
1226 @echo
' mrproper - Remove all generated files + config + various backup files'
1227 @echo
' distclean - mrproper + remove editor backup and patch files'
1229 @echo
'Configuration targets:'
1230 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1232 @echo
'Other generic targets:'
1233 @echo
' all - Build all targets marked with [*]'
1234 @echo
'* vmlinux - Build the bare kernel'
1235 @echo
'* modules - Build all modules'
1236 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1237 @echo
' firmware_install- Install all firmware to INSTALL_FW_PATH'
1238 @echo
' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1239 @echo
' dir/ - Build all files in dir and below'
1240 @echo
' dir/file.[ois] - Build specified target only'
1241 @echo
' dir/file.ko - Build module including final link'
1242 @echo
' modules_prepare - Set up for building external modules'
1243 @echo
' tags/TAGS - Generate tags file for editors'
1244 @echo
' cscope - Generate cscope index'
1245 @echo
' kernelrelease - Output the release version string'
1246 @echo
' kernelversion - Output the version stored in Makefile'
1247 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1248 echo
' (default: $(INSTALL_HDR_PATH))'; \
1250 @echo
'Static analysers'
1251 @echo
' checkstack - Generate a list of stack hogs'
1252 @echo
' namespacecheck - Name space analysis on compiled kernel'
1253 @echo
' versioncheck - Sanity check on version.h usage'
1254 @echo
' includecheck - Check for duplicate included header files'
1255 @echo
' export_report - List the usages of all exported symbols'
1256 @echo
' headers_check - Sanity check on exported headers'
1257 @echo
' headerdep - Detect inclusion cycles in headers'; \
1259 @echo
'Kernel packaging:'
1260 @
$(MAKE
) $(build
)=$(package-dir
) help
1262 @echo
'Documentation targets:'
1263 @
$(MAKE
) -f
$(srctree
)/Documentation
/DocBook
/Makefile dochelp
1265 @echo
'Architecture specific targets ($(SRCARCH)):'
1266 @
$(if
$(archhelp
),$(archhelp
),\
1267 echo
' No architecture specific help defined for $(SRCARCH)')
1270 $(foreach b
, $(boards
), \
1271 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1273 @
$(if
$(board-dirs
), \
1274 $(foreach b
, $(board-dirs
), \
1275 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1276 printf
" %-16s - Show all of the above\\n" help-boards
; \
1279 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1280 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1281 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1282 @echo
' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1283 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1285 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1286 @echo
'For further info see the ./README file'
1289 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1291 help-boards
: $(help-board-dirs
)
1293 boards-per-dir
= $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
))
1295 $(help-board-dirs
): help-
%:
1296 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1297 @
$(if
$(boards-per-dir
), \
1298 $(foreach b
, $(boards-per-dir
), \
1299 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1303 # Documentation targets
1304 # ---------------------------------------------------------------------------
1305 %docs
: scripts_basic FORCE
1306 $(Q
)$(MAKE
) $(build
)=Documentation
/DocBook
$@
1308 else # KBUILD_EXTMOD
1311 # External module support.
1312 # When building external modules the kernel used as basis is considered
1313 # read-only, and no consistency checks are made and the make
1314 # system is not used on the basis kernel. If updates are required
1315 # in the basis kernel ordinary make commands (without M=...) must
1318 # The following are the only valid targets when building external
1320 # make M=dir clean Delete all automatically generated files
1321 # make M=dir modules Make all modules in specified dir
1322 # make M=dir Same as 'make M=dir modules'
1323 # make M=dir modules_install
1324 # Install the modules built in the module directory
1325 # Assumes install directory is already created
1327 # We are always building modules
1329 PHONY
+= crmodverdir
1333 PHONY
+= $(objtree
)/Module.symvers
1334 $(objtree
)/Module.symvers
:
1335 @
test -e
$(objtree
)/Module.symvers ||
( \
1337 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1338 echo
" is missing; modules will have no dependencies and modversions."; \
1341 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1342 PHONY
+= $(module-dirs
) modules
1343 $(module-dirs
): crmodverdir
$(objtree
)/Module.symvers
1344 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1346 modules
: $(module-dirs
)
1347 @
$(kecho
) ' Building modules, stage 2.';
1348 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1350 PHONY
+= modules_install
1351 modules_install
: _emodinst_ _emodinst_post
1353 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1356 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1357 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1359 PHONY
+= _emodinst_post
1360 _emodinst_post
: _emodinst_
1363 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1365 PHONY
+= $(clean-dirs
) clean
1367 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1369 clean: rm-dirs
:= $(MODVERDIR
)
1370 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers \
1371 $(KBUILD_EXTMOD
)/Module.markers \
1372 $(KBUILD_EXTMOD
)/modules.order
1373 clean: $(clean-dirs
)
1376 @find
$(KBUILD_EXTMOD
) $(RCS_FIND_IGNORE
) \
1377 \
( -name
'*.[oas]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1378 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1379 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1382 @echo
' Building external modules.'
1383 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1385 @echo
' modules - default target, build the module(s)'
1386 @echo
' modules_install - install the module'
1387 @echo
' clean - remove generated files in module directory only'
1391 PHONY
+= prepare scripts
1394 endif # KBUILD_EXTMOD
1396 # Generate tags for editors
1397 # ---------------------------------------------------------------------------
1398 quiet_cmd_tags
= GEN
$@
1399 cmd_tags
= $(CONFIG_SHELL
) $(srctree
)/scripts
/tags.sh
$@
1401 tags TAGS cscope
: FORCE
1404 # Scripts to check various things for consistency
1405 # ---------------------------------------------------------------------------
1408 find
* $(RCS_FIND_IGNORE
) \
1409 -name
'*.[hcS]' -type f
-print |
sort \
1410 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1413 find
* $(RCS_FIND_IGNORE
) \
1414 -name
'*.[hcS]' -type f
-print |
sort \
1415 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1418 $(PERL
) $(srctree
)/scripts
/namespace.pl
1421 $(PERL
) $(srctree
)/scripts
/export_report.pl
1423 endif #ifeq ($(config-targets),1)
1424 endif #ifeq ($(mixed-targets),1)
1426 PHONY
+= checkstack kernelrelease kernelversion
1428 # UML needs a little special treatment here. It wants to use the host
1429 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1430 # else wants $(ARCH), including people doing cross-builds, which means
1431 # that $(SUBARCH) doesn't work here.
1433 CHECKSTACK_ARCH
:= $(SUBARCH
)
1435 CHECKSTACK_ARCH
:= $(ARCH
)
1438 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1439 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1442 $(if
$(wildcard include/config
/kernel.release
), $(Q
)echo
$(KERNELRELEASE
), \
1443 $(error kernelrelease not valid
- run
'make prepare' to update it
))
1445 @echo
$(KERNELVERSION
)
1448 # ---------------------------------------------------------------------------
1449 # Single targets are compatible with:
1450 # - build with mixed source and output
1451 # - build with separate output dir 'make O=...'
1452 # - external modules
1454 # target-dir => where to store outputfile
1455 # build-dir => directory in kernel source tree to use
1457 ifeq ($(KBUILD_EXTMOD
),)
1458 build-dir
= $(patsubst %/,%,$(dir $@
))
1459 target-dir
= $(dir $@
)
1461 zap-slash
=$(filter-out .
,$(patsubst %/,%,$(dir $@
)))
1462 build-dir
= $(KBUILD_EXTMOD
)$(if
$(zap-slash
),/$(zap-slash
))
1463 target-dir
= $(if
$(KBUILD_EXTMOD
),$(dir $<),$(dir $@
))
1466 %.s
: %.c prepare scripts FORCE
1467 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1468 %.i
: %.c prepare scripts FORCE
1469 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1470 %.o
: %.c prepare scripts FORCE
1471 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1472 %.lst
: %.c prepare scripts FORCE
1473 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1474 %.s
: %.S prepare scripts FORCE
1475 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1476 %.o
: %.S prepare scripts FORCE
1477 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1478 %.symtypes
: %.c prepare scripts FORCE
1479 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(target-dir
)$(notdir $@
)
1482 /: prepare scripts FORCE
1484 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1485 $(build
)=$(build-dir
)
1486 %/: prepare scripts FORCE
1488 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1489 $(build
)=$(build-dir
)
1490 %.ko
: prepare scripts FORCE
1492 $(Q
)$(MAKE
) KBUILD_MODULES
=$(if
$(CONFIG_MODULES
),1) \
1493 $(build
)=$(build-dir
) $(@
:.ko
=.o
)
1494 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1496 # FIXME Should go into a make.lib or something
1497 # ===========================================================================
1499 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1500 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1502 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1503 cmd_rmfiles
= rm -f
$(rm-files
)
1505 # Run depmod only if we have System.map and depmod is executable
1506 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1508 if
[ -r System.map
-a
-x
$(DEPMOD
) ]; then \
1509 $(DEPMOD
) -ae
-F System.map \
1510 $(if
$(strip $(INSTALL_MOD_PATH
)), -b
$(INSTALL_MOD_PATH
) ) \
1514 # Create temporary dir for module support files
1515 # clean it up only when building all modules
1516 cmd_crmodverdir
= $(Q
)mkdir
-p
$(MODVERDIR
) \
1517 $(if
$(KBUILD_MODULES
),; rm -f
$(MODVERDIR
)/*)
1519 a_flags
= -Wp
,-MD
,$(depfile
) $(KBUILD_AFLAGS
) $(AFLAGS_KERNEL
) \
1520 $(NOSTDINC_FLAGS
) $(LINUXINCLUDE
) $(KBUILD_CPPFLAGS
) \
1521 $(modkern_aflags
) $(EXTRA_AFLAGS
) $(AFLAGS_
$(basetarget
).o
)
1523 quiet_cmd_as_o_S
= AS
$@
1524 cmd_as_o_S
= $(CC
) $(a_flags
) -c
-o
$@
$<
1526 # read all saved command lines
1528 targets
:= $(wildcard $(sort $(targets
)))
1529 cmd_files
:= $(wildcard .
*.cmd
$(foreach f
,$(targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
))
1531 ifneq ($(cmd_files
),)
1532 $(cmd_files
): ; # Do not try to update included dependency files
1533 include $(cmd_files
)
1536 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1538 # $(Q)$(MAKE) $(clean)=dir
1539 clean := -f
$(if
$(KBUILD_SRC
),$(srctree
)/)scripts
/Makefile.
clean obj
1541 endif # skip-makefile
1546 # Declare the contents of the .PHONY variable as phony. We keep that
1547 # information in a variable so we can use it in if_changed and friends.