5 NAME = Terrified Chipmunk
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 := $(O)
105 ifeq ("$(origin W)", "command line")
106 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
109 # That's our default target when none is given on the command line
113 # Cancel implicit rules on top Makefile
114 $(CURDIR)/Makefile Makefile: ;
116 ifneq ($(KBUILD_OUTPUT),)
117 # Invoke a second make in the output directory, passing relevant variables
118 # check that the output directory actually exists
119 saved-output := $(KBUILD_OUTPUT)
120 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
121 $(if $(KBUILD_OUTPUT),, \
122 $(error output directory "$(saved-output)" does not exist))
124 PHONY += $(MAKECMDGOALS) sub-make
126 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
130 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
131 KBUILD_SRC=$(CURDIR) \
132 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
133 $(filter-out _all sub-make,$(MAKECMDGOALS))
135 # Leave processing to above invocation of make
137 endif # ifneq ($(KBUILD_OUTPUT),)
138 endif # ifeq ($(KBUILD_SRC),)
140 # We process the rest of the Makefile if this is the final invocation of make
141 ifeq ($(skip-makefile),)
143 # If building an external module we do not care about the all: rule
144 # but instead _all depend on modules
146 ifeq ($(KBUILD_EXTMOD),)
152 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
157 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
159 export srctree objtree VPATH
162 # SUBARCH tells the usermode build what the underlying arch is. That is set
163 # first, and if a usermode build is happening, the "ARCH=um" on the command
164 # line overrides the setting of ARCH below. If a native build is happening,
165 # then ARCH is assigned, getting whatever value it gets normally, and
166 # SUBARCH is subsequently ignored.
168 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
174 # Cross compiling and selecting different set of gcc/bin-utils
175 # ---------------------------------------------------------------------------
177 # When performing cross compilation for other architectures ARCH shall be set
178 # to the target architecture. (See arch/* for the possibilities).
179 # ARCH can be set during invocation of make:
181 # Another way is to have ARCH set in the environment.
182 # The default ARCH is the host where make is executed.
184 # CROSS_COMPILE specify the prefix used for all executables used
185 # during compilation. Only gcc and related bin-utils executables
186 # are prefixed with $(CROSS_COMPILE).
187 # CROSS_COMPILE can be set on the command line
188 # make CROSS_COMPILE=ia64-linux-
189 # Alternatively CROSS_COMPILE can be set in the environment.
190 # A third alternative is to store a setting in .config so that plain
191 # "make" in the configured kernel build directory always uses that.
192 # Default value for CROSS_COMPILE is not to prefix executables
193 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
194 export KBUILD_BUILDHOST := $(SUBARCH)
196 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
198 # Architecture as present in compile.h
199 UTS_MACHINE := $(ARCH)
202 # Additional ARCH settings for x86
206 ifeq ($(ARCH),x86_64)
210 # Additional ARCH settings for sparc
211 ifeq ($(ARCH),sparc32)
214 ifeq ($(ARCH),sparc64)
218 # Additional ARCH settings for sh
223 # Additional ARCH settings for tile
224 ifeq ($(ARCH),tilepro)
227 ifeq ($(ARCH),tilegx)
231 # Where to locate arch specific headers
232 hdr-arch := $(SRCARCH)
234 KCONFIG_CONFIG ?= .config
235 export KCONFIG_CONFIG
237 # SHELL used by kbuild
238 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
239 else if [ -x /bin/bash ]; then echo /bin/bash; \
240 else echo sh; fi ; fi)
244 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
247 # Decide whether to build built-in, modular, or both.
248 # Normally, just do built-in.
253 # If we have only "make modules", don't compile built-in objects.
254 # When we're building modules with modversions, we need to consider
255 # the built-in objects during the descend as well, in order to
256 # make sure the checksums are up to date before we record them.
258 ifeq ($(MAKECMDGOALS),modules)
259 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
262 # If we have "make <whatever> modules", compile modules
263 # in addition to whatever we do anyway.
264 # Just "make" or "make all" shall build modules as well
266 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
270 ifeq ($(MAKECMDGOALS),)
274 export KBUILD_MODULES KBUILD_BUILTIN
275 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
278 # ---------------------------------------------------------------------------
280 # Normally, we echo the whole command before executing it. By making
281 # that echo $($(quiet)$(cmd)), we now have the possibility to set
282 # $(quiet) to choose other forms of output instead, e.g.
284 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
285 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
287 # If $(quiet) is empty, the whole command will be printed.
288 # If it is set to "quiet_", only the short version will be printed.
289 # If it is set to "silent_", nothing will be printed at all, since
290 # the variable $(silent_cmd_cc_o_c) doesn't exist.
292 # A simple variant is to prefix commands with $(Q) - that's useful
293 # for commands that shall be hidden in non-verbose mode.
297 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
298 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
300 ifeq ($(KBUILD_VERBOSE),1)
308 # If the user is running make -s (silent mode), suppress echoing of
311 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
315 export quiet Q KBUILD_VERBOSE
318 # Look for make include files relative to root of kernel src
319 MAKEFLAGS += --include-dir=$(srctree)
321 # We need some generic definitions (do not try to remake the file).
322 $(srctree)/scripts/Kbuild.include: ;
323 include $(srctree)/scripts/Kbuild.include
325 # Make variables (CC, etc...)
327 AS = $(CROSS_COMPILE)as
328 LD = $(CROSS_COMPILE)ld
329 CC = $(CROSS_COMPILE)gcc
331 AR = $(CROSS_COMPILE)ar
332 NM = $(CROSS_COMPILE)nm
333 STRIP = $(CROSS_COMPILE)strip
334 OBJCOPY = $(CROSS_COMPILE)objcopy
335 OBJDUMP = $(CROSS_COMPILE)objdump
337 GENKSYMS = scripts/genksyms/genksyms
338 INSTALLKERNEL := installkernel
339 DEPMOD = /sbin/depmod
343 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
344 -Wbitwise -Wno-return-void $(CF)
350 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
353 # Use USERINCLUDE when you must reference the UAPI directories only.
355 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
356 -Iarch/$(hdr-arch)/include/generated/uapi \
357 -I$(srctree)/include/uapi \
358 -Iinclude/generated/uapi \
359 -include $(srctree)/include/linux/kconfig.h
361 # Use LINUXINCLUDE when you must reference the include/ directory.
362 # Needed to be compatible with the O= option
364 -I$(srctree)/arch/$(hdr-arch)/include \
365 -Iarch/$(hdr-arch)/include/generated \
366 $(if $(KBUILD_SRC), -I$(srctree)/include) \
370 KBUILD_CPPFLAGS := -D__KERNEL__
372 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
373 -fno-strict-aliasing -fno-common \
374 -Werror-implicit-function-declaration \
375 -Wno-format-security \
376 -fno-delete-null-pointer-checks
377 KBUILD_AFLAGS_KERNEL :=
378 KBUILD_CFLAGS_KERNEL :=
379 KBUILD_AFLAGS := -D__ASSEMBLY__
380 KBUILD_AFLAGS_MODULE := -DMODULE
381 KBUILD_CFLAGS_MODULE := -DMODULE
382 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
384 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
385 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
386 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
388 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
389 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
390 export CPP AR NM STRIP OBJCOPY OBJDUMP
391 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
392 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
394 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
395 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
396 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
397 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
398 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
399 export KBUILD_ARFLAGS
401 # When compiling out-of-tree modules, put MODVERDIR in the module
402 # tree rather than in the kernel tree. The kernel tree might
404 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
406 # Files to ignore in find ... statements
408 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
409 -o -name .pc -o -name .hg -o -name .git \) -prune -o
410 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
411 --exclude CVS --exclude .pc --exclude .hg --exclude .git
413 # ===========================================================================
414 # Rules shared between *config targets and build targets
416 # Basic helpers built in scripts/
417 PHONY += scripts_basic
419 $(Q)$(MAKE) $(build)=scripts/basic
420 $(Q)rm -f .tmp_quiet_recordmcount
422 # To avoid any implicit rule to kick in, define an empty command.
423 scripts/basic/%: scripts_basic ;
425 PHONY += outputmakefile
426 # outputmakefile generates a Makefile in the output directory, if using a
427 # separate output directory. This allows convenient use of make in the
430 ifneq ($(KBUILD_SRC),)
431 $(Q)ln -fsn $(srctree) source
432 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
433 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
436 # Support for using generic headers in asm-generic
439 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
440 obj=arch/$(SRCARCH)/include/generated/asm
442 # To make sure we do not include .config for any of the *config targets
443 # catch them early, and hand them over to scripts/kconfig/Makefile
444 # It is allowed to specify more targets when calling make, including
445 # mixing *config targets and build targets.
446 # For example 'make oldconfig all'.
447 # Detect when mixed targets is specified, and make a second invocation
448 # of make so .config is not included in this case either (for *config).
450 version_h := include/generated/uapi/linux/version.h
452 no-dot-config-targets := clean mrproper distclean \
453 cscope gtags TAGS tags help %docs check% coccicheck \
454 $(version_h) headers_% archheaders archscripts \
455 kernelversion %src-pkg
461 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
462 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
467 ifeq ($(KBUILD_EXTMOD),)
468 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
470 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
476 ifeq ($(mixed-targets),1)
477 # ===========================================================================
478 # We're called with mixed targets (*config and build targets).
479 # Handle them one by one.
482 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
485 ifeq ($(config-targets),1)
486 # ===========================================================================
487 # *config targets only - make sure prerequisites are updated, and descend
488 # in scripts/kconfig to make the *config target
490 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
491 # KBUILD_DEFCONFIG may point out an alternative default configuration
492 # used for 'make defconfig'
493 include $(srctree)/arch/$(SRCARCH)/Makefile
494 export KBUILD_DEFCONFIG KBUILD_KCONFIG
496 config: scripts_basic outputmakefile FORCE
497 $(Q)mkdir -p include/linux include/config
498 $(Q)$(MAKE) $(build)=scripts/kconfig $@
500 %config: scripts_basic outputmakefile FORCE
501 $(Q)mkdir -p include/linux include/config
502 $(Q)$(MAKE) $(build)=scripts/kconfig $@
505 # ===========================================================================
506 # Build targets only - this includes vmlinux, arch specific targets, clean
507 # targets and others. In general all targets except *config targets.
509 ifeq ($(KBUILD_EXTMOD),)
510 # Additional helpers built in scripts/
511 # Carefully list dependencies so we do not try to build scripts twice
514 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
515 $(Q)$(MAKE) $(build)=$(@)
517 # Objects we will link into vmlinux / subdirs we need to visit
519 drivers-y := drivers/ sound/ firmware/
523 endif # KBUILD_EXTMOD
525 ifeq ($(dot-config),1)
527 -include include/config/auto.conf
529 ifeq ($(KBUILD_EXTMOD),)
530 # Read in dependencies to all Kconfig* files, make sure to run
531 # oldconfig if changes are detected.
532 -include include/config/auto.conf.cmd
534 # To avoid any implicit rule to kick in, define an empty command
535 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
537 # If .config is newer than include/config/auto.conf, someone tinkered
538 # with it and forgot to run make oldconfig.
539 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
540 # we execute the config step to be sure to catch updated Kconfig files
541 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
542 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
544 # external modules needs include/generated/autoconf.h and include/config/auto.conf
545 # but do not care if they are up-to-date. Use auto.conf to trigger the test
546 PHONY += include/config/auto.conf
548 include/config/auto.conf:
549 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
551 echo >&2 " ERROR: Kernel configuration is invalid."; \
552 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
553 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
557 endif # KBUILD_EXTMOD
560 # Dummy target needed, because used as prerequisite
561 include/config/auto.conf: ;
562 endif # $(dot-config)
564 # The all: target is the default when no target is given on the
566 # This allow a user to issue only 'make' to build a kernel including modules
567 # Defaults to vmlinux, but the arch makefile usually adds further targets
570 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
576 include $(srctree)/arch/$(SRCARCH)/Makefile
578 ifdef CONFIG_READABLE_ASM
579 # Disable optimizations that make assembler listings hard to read.
580 # reorder blocks reorders the control in the function
581 # ipa clone creates specialized cloned functions
582 # partial inlining inlines only parts of functions
583 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
584 $(call cc-option,-fno-ipa-cp-clone,) \
585 $(call cc-option,-fno-partial-inlining)
588 ifneq ($(CONFIG_FRAME_WARN),0)
589 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
592 # Force gcc to behave correct even for buggy distributions
593 ifndef CONFIG_CC_STACKPROTECTOR
594 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
597 # This warning generated too much noise in a regular build.
598 # Use make W=1 to enable this warning (see scripts/Makefile.build)
599 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
601 ifdef CONFIG_FRAME_POINTER
602 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
604 # Some targets (ARM with Thumb2, for example), can't be built with frame
605 # pointers. For those, we don't have FUNCTION_TRACER automatically
606 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
607 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
608 # -fomit-frame-pointer with FUNCTION_TRACER.
609 ifndef CONFIG_FUNCTION_TRACER
610 KBUILD_CFLAGS += -fomit-frame-pointer
614 ifdef CONFIG_DEBUG_INFO
616 KBUILD_AFLAGS += -gdwarf-2
619 ifdef CONFIG_DEBUG_INFO_REDUCED
620 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
623 ifdef CONFIG_FUNCTION_TRACER
624 ifdef CONFIG_HAVE_FENTRY
625 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
627 KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
628 KBUILD_AFLAGS += $(CC_USING_FENTRY)
629 ifdef CONFIG_DYNAMIC_FTRACE
630 ifdef CONFIG_HAVE_C_RECORDMCOUNT
631 BUILD_C_RECORDMCOUNT := y
632 export BUILD_C_RECORDMCOUNT
637 # We trigger additional mismatches with less inlining
638 ifdef CONFIG_DEBUG_SECTION_MISMATCH
639 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
642 # arch Makefile may override CC so keep this after arch Makefile is included
643 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
644 CHECKFLAGS += $(NOSTDINC_FLAGS)
646 # warn about C99 declaration after statement
647 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
649 # disable pointer signed / unsigned warnings in gcc 4.0
650 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
652 # disable invalid "can't wrap" optimizations for signed / pointers
653 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
655 # conserve stack if available
656 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
658 # use the deterministic mode of AR if available
659 KBUILD_ARFLAGS := $(call ar-option,D)
661 # check for 'asm goto'
662 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
663 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
666 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
667 KBUILD_CPPFLAGS += $(KCPPFLAGS)
668 KBUILD_AFLAGS += $(KAFLAGS)
669 KBUILD_CFLAGS += $(KCFLAGS)
671 # Use --build-id when available.
672 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
673 $(call cc-ldoption, -Wl$(comma)--build-id,))
674 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
675 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
677 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
678 LDFLAGS_vmlinux += $(call ld-option, -X,)
681 # Default kernel image to build when no specific target is given.
682 # KBUILD_IMAGE may be overruled on the command line or
683 # set in the environment
684 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
686 export KBUILD_IMAGE ?= vmlinux
689 # INSTALL_PATH specifies where to place the updated kernel and system map
690 # images. Default is /boot, but you can set it to other values
691 export INSTALL_PATH ?= /boot
694 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
695 # relocations required by build roots. This is not defined in the
696 # makefile but the argument can be passed to make if needed.
699 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
703 # INSTALL_MOD_STRIP, if defined, will cause modules to be
704 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
705 # the default option --strip-debug will be used. Otherwise,
706 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
708 ifdef INSTALL_MOD_STRIP
709 ifeq ($(INSTALL_MOD_STRIP),1)
710 mod_strip_cmd = $(STRIP) --strip-debug
712 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
713 endif # INSTALL_MOD_STRIP=1
716 endif # INSTALL_MOD_STRIP
720 ifeq ($(KBUILD_EXTMOD),)
721 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
723 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
724 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
725 $(net-y) $(net-m) $(libs-y) $(libs-m)))
727 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
729 $(core-n) $(core-) $(drivers-n) $(drivers-) \
730 $(net-n) $(net-) $(libs-n) $(libs-))))
732 init-y := $(patsubst %/, %/built-in.o, $(init-y))
733 core-y := $(patsubst %/, %/built-in.o, $(core-y))
734 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
735 net-y := $(patsubst %/, %/built-in.o, $(net-y))
736 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
737 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
738 libs-y := $(libs-y1) $(libs-y2)
740 # Externally visible symbols (used by link-vmlinux.sh)
741 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
742 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
743 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
744 export LDFLAGS_vmlinux
746 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
748 # Final link of vmlinux
749 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
750 quiet_cmd_link-vmlinux = LINK $@
752 # Include targets which we want to
753 # execute if the rest of the kernel build went well.
754 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
755 ifdef CONFIG_HEADERS_CHECK
756 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
759 $(Q)$(MAKE) $(build)=samples
761 ifdef CONFIG_BUILD_DOCSRC
762 $(Q)$(MAKE) $(build)=Documentation
764 +$(call if_changed,link-vmlinux)
766 # The actual objects are generated when descending,
767 # make sure no implicit rule kicks in
768 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
770 # Handle descending into subdirectories listed in $(vmlinux-dirs)
771 # Preset locale variables to speed up the build process. Limit locale
772 # tweaks to this spot to avoid wrong language settings when running
773 # make menuconfig etc.
774 # Error messages still appears in the original language
776 PHONY += $(vmlinux-dirs)
777 $(vmlinux-dirs): prepare scripts
778 $(Q)$(MAKE) $(build)=$@
780 # Store (new) KERNELRELASE string in include/config/kernel.release
781 include/config/kernel.release: include/config/auto.conf FORCE
783 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
786 # Things we need to do before we recursively start building the kernel
787 # or the modules are listed in "prepare".
788 # A multi level approach is used. prepareN is processed before prepareN-1.
789 # archprepare is used in arch Makefiles and when processed asm symlink,
790 # version.h and scripts_basic is processed / created.
792 # Listed in dependency order
793 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
795 # prepare3 is used to check if we are building in a separate output directory,
797 # 1) Check that make has not been executed in the kernel src $(srctree)
798 prepare3: include/config/kernel.release
799 ifneq ($(KBUILD_SRC),)
800 @$(kecho) ' Using $(srctree) as source for kernel'
801 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
802 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
803 echo >&2 " in the '$(srctree)' directory.";\
808 # prepare2 creates a makefile if using a separate output directory
809 prepare2: prepare3 outputmakefile asm-generic
811 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
812 include/config/auto.conf
815 archprepare: archheaders archscripts prepare1 scripts_basic
817 prepare0: archprepare FORCE
818 $(Q)$(MAKE) $(build)=.
820 # All the preparing..
823 # Generate some files
824 # ---------------------------------------------------------------------------
826 # KERNELRELEASE can change from a few different places, meaning version.h
827 # needs to be updated, so this check is forced on all builds
830 define filechk_utsrelease.h
831 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
832 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
835 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
838 define filechk_version.h
839 (echo \#define LINUX_VERSION_CODE $(shell \
840 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
841 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
844 $(version_h): $(srctree)/Makefile FORCE
845 $(call filechk,version.h)
847 include/generated/utsrelease.h: include/config/kernel.release FORCE
848 $(call filechk,utsrelease.h)
852 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
853 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
855 # ---------------------------------------------------------------------------
859 @echo '*** Warning: make $@ is unnecessary now.'
861 # ---------------------------------------------------------------------------
863 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
864 export INSTALL_FW_PATH
866 PHONY += firmware_install
867 firmware_install: FORCE
868 @mkdir -p $(objtree)/firmware
869 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
871 # ---------------------------------------------------------------------------
874 #Default location for installed headers
875 export INSTALL_HDR_PATH = $(objtree)/usr
877 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
879 # If we do an all arch process set dst to asm-$(hdr-arch)
880 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
889 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
890 $(Q)$(MAKE) $(build)=scripts build_unifdef
892 PHONY += headers_install_all
894 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
896 PHONY += headers_install
897 headers_install: __headers
898 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
899 $(error Headers not exportable for the $(SRCARCH) architecture))
900 $(Q)$(MAKE) $(hdr-inst)=include/uapi
901 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
903 PHONY += headers_check_all
904 headers_check_all: headers_install_all
905 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
907 PHONY += headers_check
908 headers_check: headers_install
909 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
910 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
912 # ---------------------------------------------------------------------------
917 # By default, build modules as well
923 # A module can be listed more than once in obj-m resulting in
924 # duplicate lines in modules.order files. Those are removed
925 # using awk while concatenating to the final file.
928 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
929 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
930 @$(kecho) ' Building modules, stage 2.';
931 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
932 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
934 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
935 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
937 %/modules.builtin: include/config/auto.conf
938 $(Q)$(MAKE) $(modbuiltin)=$*
941 # Target to prepare building external modules
942 PHONY += modules_prepare
943 modules_prepare: prepare scripts
945 # Target to install modules
946 PHONY += modules_install
947 modules_install: _modinst_ _modinst_post
951 @rm -rf $(MODLIB)/kernel
952 @rm -f $(MODLIB)/source
953 @mkdir -p $(MODLIB)/kernel
954 @ln -s $(srctree) $(MODLIB)/source
955 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
956 rm -f $(MODLIB)/build ; \
957 ln -s $(objtree) $(MODLIB)/build ; \
959 @cp -f $(objtree)/modules.order $(MODLIB)/
960 @cp -f $(objtree)/modules.builtin $(MODLIB)/
961 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
963 # This depmod is only for convenience to give the initial
964 # boot a modules.dep even before / is mounted read-write. However the
965 # boot script depmod is the master version.
966 PHONY += _modinst_post
967 _modinst_post: _modinst_
968 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
971 else # CONFIG_MODULES
973 # Modules not configured
974 # ---------------------------------------------------------------------------
976 modules modules_install: FORCE
978 @echo >&2 "The present kernel configuration has modules disabled."
979 @echo >&2 "Type 'make config' and enable loadable module support."
980 @echo >&2 "Then build a kernel with module support enabled."
984 endif # CONFIG_MODULES
987 # Cleaning is done on three levels.
988 # make clean Delete most generated files
989 # Leave enough to build external modules
990 # make mrproper Delete the current configuration, and all generated files
991 # make distclean Remove editor backup files, patch leftover files and the like
993 # Directories & files removed with 'make clean'
994 CLEAN_DIRS += $(MODVERDIR)
996 # Directories & files removed with 'make mrproper'
997 MRPROPER_DIRS += include/config usr/include include/generated \
998 arch/*/include/generated
999 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1000 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1002 # clean - Delete most, but leave enough to build external modules
1004 clean: rm-dirs := $(CLEAN_DIRS)
1005 clean: rm-files := $(CLEAN_FILES)
1006 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1008 PHONY += $(clean-dirs) clean archclean
1010 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1014 # mrproper - Delete all generated files, including .config
1016 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1017 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1018 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1020 PHONY += $(mrproper-dirs) mrproper archmrproper
1022 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1024 mrproper: clean archmrproper $(mrproper-dirs)
1033 @find $(srctree) $(RCS_FIND_IGNORE) \
1034 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1035 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1037 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1038 -type f -print | xargs rm -f
1041 # Packaging of the kernel to various formats
1042 # ---------------------------------------------------------------------------
1043 # rpm target kept for backward compatibility
1044 package-dir := $(srctree)/scripts/package
1047 $(Q)$(MAKE) $(build)=$(package-dir) $@
1048 %pkg: include/config/kernel.release FORCE
1049 $(Q)$(MAKE) $(build)=$(package-dir) $@
1050 rpm: include/config/kernel.release FORCE
1051 $(Q)$(MAKE) $(build)=$(package-dir) $@
1054 # Brief documentation of the typical targets used
1055 # ---------------------------------------------------------------------------
1057 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1058 boards := $(notdir $(boards))
1059 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1060 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1063 @echo 'Cleaning targets:'
1064 @echo ' clean - Remove most generated files but keep the config and'
1065 @echo ' enough build support to build external modules'
1066 @echo ' mrproper - Remove all generated files + config + various backup files'
1067 @echo ' distclean - mrproper + remove editor backup and patch files'
1069 @echo 'Configuration targets:'
1070 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1072 @echo 'Other generic targets:'
1073 @echo ' all - Build all targets marked with [*]'
1074 @echo '* vmlinux - Build the bare kernel'
1075 @echo '* modules - Build all modules'
1076 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1077 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1078 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1079 @echo ' dir/ - Build all files in dir and below'
1080 @echo ' dir/file.[oisS] - Build specified target only'
1081 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1082 @echo ' (requires a recent binutils and recent build (System.map))'
1083 @echo ' dir/file.ko - Build module including final link'
1084 @echo ' modules_prepare - Set up for building external modules'
1085 @echo ' tags/TAGS - Generate tags file for editors'
1086 @echo ' cscope - Generate cscope index'
1087 @echo ' gtags - Generate GNU GLOBAL index'
1088 @echo ' kernelrelease - Output the release version string'
1089 @echo ' kernelversion - Output the version stored in Makefile'
1090 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1091 echo ' (default: $(INSTALL_HDR_PATH))'; \
1093 @echo 'Static analysers'
1094 @echo ' checkstack - Generate a list of stack hogs'
1095 @echo ' namespacecheck - Name space analysis on compiled kernel'
1096 @echo ' versioncheck - Sanity check on version.h usage'
1097 @echo ' includecheck - Check for duplicate included header files'
1098 @echo ' export_report - List the usages of all exported symbols'
1099 @echo ' headers_check - Sanity check on exported headers'
1100 @echo ' headerdep - Detect inclusion cycles in headers'
1101 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1103 @echo 'Kernel packaging:'
1104 @$(MAKE) $(build)=$(package-dir) help
1106 @echo 'Documentation targets:'
1107 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1109 @echo 'Architecture specific targets ($(SRCARCH)):'
1110 @$(if $(archhelp),$(archhelp),\
1111 echo ' No architecture specific help defined for $(SRCARCH)')
1114 $(foreach b, $(boards), \
1115 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1117 @$(if $(board-dirs), \
1118 $(foreach b, $(board-dirs), \
1119 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1120 printf " %-16s - Show all of the above\\n" help-boards; \
1123 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1124 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1125 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1126 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1127 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1128 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1129 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1130 @echo ' 1: warnings which may be relevant and do not occur too often'
1131 @echo ' 2: warnings which occur quite often but may still be relevant'
1132 @echo ' 3: more obscure warnings, can most likely be ignored'
1133 @echo ' Multiple levels can be combined with W=12 or W=123'
1135 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1136 @echo 'For further info see the ./README file'
1139 help-board-dirs := $(addprefix help-,$(board-dirs))
1141 help-boards: $(help-board-dirs)
1143 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1145 $(help-board-dirs): help-%:
1146 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1147 @$(if $(boards-per-dir), \
1148 $(foreach b, $(boards-per-dir), \
1149 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1153 # Documentation targets
1154 # ---------------------------------------------------------------------------
1155 %docs: scripts_basic FORCE
1156 $(Q)$(MAKE) $(build)=scripts build_docproc
1157 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1159 else # KBUILD_EXTMOD
1162 # External module support.
1163 # When building external modules the kernel used as basis is considered
1164 # read-only, and no consistency checks are made and the make
1165 # system is not used on the basis kernel. If updates are required
1166 # in the basis kernel ordinary make commands (without M=...) must
1169 # The following are the only valid targets when building external
1171 # make M=dir clean Delete all automatically generated files
1172 # make M=dir modules Make all modules in specified dir
1173 # make M=dir Same as 'make M=dir modules'
1174 # make M=dir modules_install
1175 # Install the modules built in the module directory
1176 # Assumes install directory is already created
1178 # We are always building modules
1180 PHONY += crmodverdir
1184 PHONY += $(objtree)/Module.symvers
1185 $(objtree)/Module.symvers:
1186 @test -e $(objtree)/Module.symvers || ( \
1188 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1189 echo " is missing; modules will have no dependencies and modversions."; \
1192 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1193 PHONY += $(module-dirs) modules
1194 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1195 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1197 modules: $(module-dirs)
1198 @$(kecho) ' Building modules, stage 2.';
1199 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1201 PHONY += modules_install
1202 modules_install: _emodinst_ _emodinst_post
1204 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1207 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1208 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1210 PHONY += _emodinst_post
1211 _emodinst_post: _emodinst_
1214 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1216 PHONY += $(clean-dirs) clean
1218 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1220 clean: rm-dirs := $(MODVERDIR)
1221 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1224 @echo ' Building external modules.'
1225 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1227 @echo ' modules - default target, build the module(s)'
1228 @echo ' modules_install - install the module'
1229 @echo ' clean - remove generated files in module directory only'
1233 PHONY += prepare scripts
1236 endif # KBUILD_EXTMOD
1238 clean: $(clean-dirs)
1239 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1242 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1243 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1244 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1245 -o -name '*.symtypes' -o -name 'modules.order' \
1246 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1247 -o -name '*.gcno' \) -type f -print | xargs rm -f
1249 # Generate tags for editors
1250 # ---------------------------------------------------------------------------
1251 quiet_cmd_tags = GEN $@
1252 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1254 tags TAGS cscope gtags: FORCE
1257 # Scripts to check various things for consistency
1258 # ---------------------------------------------------------------------------
1260 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1263 find $(srctree)/* $(RCS_FIND_IGNORE) \
1264 -name '*.[hcS]' -type f -print | sort \
1265 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1268 find $(srctree)/* $(RCS_FIND_IGNORE) \
1269 -name '*.[hcS]' -type f -print | sort \
1270 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1273 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1276 $(PERL) $(srctree)/scripts/namespace.pl
1279 $(PERL) $(srctree)/scripts/export_report.pl
1281 endif #ifeq ($(config-targets),1)
1282 endif #ifeq ($(mixed-targets),1)
1284 PHONY += checkstack kernelrelease kernelversion
1286 # UML needs a little special treatment here. It wants to use the host
1287 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1288 # else wants $(ARCH), including people doing cross-builds, which means
1289 # that $(SUBARCH) doesn't work here.
1291 CHECKSTACK_ARCH := $(SUBARCH)
1293 CHECKSTACK_ARCH := $(ARCH)
1296 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1297 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1300 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1303 @echo $(KERNELVERSION)
1305 # Clear a bunch of variables before executing the submake
1307 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/
1310 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/ $*
1313 # ---------------------------------------------------------------------------
1314 # Single targets are compatible with:
1315 # - build with mixed source and output
1316 # - build with separate output dir 'make O=...'
1317 # - external modules
1319 # target-dir => where to store outputfile
1320 # build-dir => directory in kernel source tree to use
1322 ifeq ($(KBUILD_EXTMOD),)
1323 build-dir = $(patsubst %/,%,$(dir $@))
1324 target-dir = $(dir $@)
1326 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1327 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1328 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1331 %.s: %.c prepare scripts FORCE
1332 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1333 %.i: %.c prepare scripts FORCE
1334 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1335 %.o: %.c prepare scripts FORCE
1336 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1337 %.lst: %.c prepare scripts FORCE
1338 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1339 %.s: %.S prepare scripts FORCE
1340 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1341 %.o: %.S prepare scripts FORCE
1342 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1343 %.symtypes: %.c prepare scripts FORCE
1344 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1347 /: prepare scripts FORCE
1349 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1350 $(build)=$(build-dir)
1351 %/: prepare scripts FORCE
1353 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1354 $(build)=$(build-dir)
1355 %.ko: prepare scripts FORCE
1357 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1358 $(build)=$(build-dir) $(@:.ko=.o)
1359 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1361 # FIXME Should go into a make.lib or something
1362 # ===========================================================================
1364 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1365 cmd_rmdirs = rm -rf $(rm-dirs)
1367 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1368 cmd_rmfiles = rm -f $(rm-files)
1370 # Run depmod only if we have System.map and depmod is executable
1371 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1372 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1375 # Create temporary dir for module support files
1376 # clean it up only when building all modules
1377 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1378 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1380 # read all saved command lines
1382 targets := $(wildcard $(sort $(targets)))
1383 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1385 ifneq ($(cmd_files),)
1386 $(cmd_files): ; # Do not try to update included dependency files
1387 include $(cmd_files)
1390 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1392 # $(Q)$(MAKE) $(clean)=dir
1393 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1395 endif # skip-makefile
1400 # Declare the contents of the .PHONY variable as phony. We keep that
1401 # information in a variable so we can use it in if_changed and friends.