5 NAME = Unicycling Gorilla
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/x86/ -e s/x86_64/x86/ \
169 -e s/sun4u/sparc64/ \
170 -e s/arm.*/arm/ -e s/sa110/arm/ \
171 -e s/s390x/s390/ -e s/parisc64/parisc/ \
172 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
173 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
175 # Cross compiling and selecting different set of gcc/bin-utils
176 # ---------------------------------------------------------------------------
178 # When performing cross compilation for other architectures ARCH shall be set
179 # to the target architecture. (See arch/* for the possibilities).
180 # ARCH can be set during invocation of make:
182 # Another way is to have ARCH set in the environment.
183 # The default ARCH is the host where make is executed.
185 # CROSS_COMPILE specify the prefix used for all executables used
186 # during compilation. Only gcc and related bin-utils executables
187 # are prefixed with $(CROSS_COMPILE).
188 # CROSS_COMPILE can be set on the command line
189 # make CROSS_COMPILE=ia64-linux-
190 # Alternatively CROSS_COMPILE can be set in the environment.
191 # A third alternative is to store a setting in .config so that plain
192 # "make" in the configured kernel build directory always uses that.
193 # Default value for CROSS_COMPILE is not to prefix executables
194 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
195 export KBUILD_BUILDHOST := $(SUBARCH)
197 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
199 # Architecture as present in compile.h
200 UTS_MACHINE := $(ARCH)
203 # Additional ARCH settings for x86
207 ifeq ($(ARCH),x86_64)
211 # Additional ARCH settings for sparc
212 ifeq ($(ARCH),sparc32)
215 ifeq ($(ARCH),sparc64)
219 # Additional ARCH settings for sh
224 # Additional ARCH settings for tile
225 ifeq ($(ARCH),tilepro)
228 ifeq ($(ARCH),tilegx)
232 # Where to locate arch specific headers
233 hdr-arch := $(SRCARCH)
235 KCONFIG_CONFIG ?= .config
236 export KCONFIG_CONFIG
238 # SHELL used by kbuild
239 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
240 else if [ -x /bin/bash ]; then echo /bin/bash; \
241 else echo sh; fi ; fi)
245 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
248 # Decide whether to build built-in, modular, or both.
249 # Normally, just do built-in.
254 # If we have only "make modules", don't compile built-in objects.
255 # When we're building modules with modversions, we need to consider
256 # the built-in objects during the descend as well, in order to
257 # make sure the checksums are up to date before we record them.
259 ifeq ($(MAKECMDGOALS),modules)
260 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
263 # If we have "make <whatever> modules", compile modules
264 # in addition to whatever we do anyway.
265 # Just "make" or "make all" shall build modules as well
267 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
271 ifeq ($(MAKECMDGOALS),)
275 export KBUILD_MODULES KBUILD_BUILTIN
276 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
279 # ---------------------------------------------------------------------------
281 # Normally, we echo the whole command before executing it. By making
282 # that echo $($(quiet)$(cmd)), we now have the possibility to set
283 # $(quiet) to choose other forms of output instead, e.g.
285 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
286 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
288 # If $(quiet) is empty, the whole command will be printed.
289 # If it is set to "quiet_", only the short version will be printed.
290 # If it is set to "silent_", nothing will be printed at all, since
291 # the variable $(silent_cmd_cc_o_c) doesn't exist.
293 # A simple variant is to prefix commands with $(Q) - that's useful
294 # for commands that shall be hidden in non-verbose mode.
298 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
299 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
301 ifeq ($(KBUILD_VERBOSE),1)
309 # If the user is running make -s (silent mode), suppress echoing of
312 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
316 export quiet Q KBUILD_VERBOSE
319 # Look for make include files relative to root of kernel src
320 MAKEFLAGS += --include-dir=$(srctree)
322 # We need some generic definitions (do not try to remake the file).
323 $(srctree)/scripts/Kbuild.include: ;
324 include $(srctree)/scripts/Kbuild.include
326 # Make variables (CC, etc...)
328 AS = $(CROSS_COMPILE)as
329 LD = $(CROSS_COMPILE)ld
330 CC = $(CROSS_COMPILE)gcc
332 AR = $(CROSS_COMPILE)ar
333 NM = $(CROSS_COMPILE)nm
334 STRIP = $(CROSS_COMPILE)strip
335 OBJCOPY = $(CROSS_COMPILE)objcopy
336 OBJDUMP = $(CROSS_COMPILE)objdump
338 GENKSYMS = scripts/genksyms/genksyms
339 INSTALLKERNEL := installkernel
340 DEPMOD = /sbin/depmod
344 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
345 -Wbitwise -Wno-return-void $(CF)
351 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
354 # Use USERINCLUDE when you must reference the UAPI directories only.
356 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
357 -Iarch/$(hdr-arch)/include/generated/uapi \
358 -I$(srctree)/include/uapi \
359 -Iinclude/generated/uapi \
360 -include $(srctree)/include/linux/kconfig.h
362 # Use LINUXINCLUDE when you must reference the include/ directory.
363 # Needed to be compatible with the O= option
365 -I$(srctree)/arch/$(hdr-arch)/include \
366 -Iarch/$(hdr-arch)/include/generated \
367 $(if $(KBUILD_SRC), -I$(srctree)/include) \
371 KBUILD_CPPFLAGS := -D__KERNEL__
373 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
374 -fno-strict-aliasing -fno-common \
375 -Werror-implicit-function-declaration \
376 -Wno-format-security \
377 -fno-delete-null-pointer-checks
378 KBUILD_AFLAGS_KERNEL :=
379 KBUILD_CFLAGS_KERNEL :=
380 KBUILD_AFLAGS := -D__ASSEMBLY__
381 KBUILD_AFLAGS_MODULE := -DMODULE
382 KBUILD_CFLAGS_MODULE := -DMODULE
383 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
385 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
386 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
387 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
389 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
390 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
391 export CPP AR NM STRIP OBJCOPY OBJDUMP
392 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
393 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
395 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
396 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
397 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
398 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
399 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
400 export KBUILD_ARFLAGS
402 # When compiling out-of-tree modules, put MODVERDIR in the module
403 # tree rather than in the kernel tree. The kernel tree might
405 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
407 # Files to ignore in find ... statements
409 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
410 -o -name .pc -o -name .hg -o -name .git \) -prune -o
411 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
412 --exclude CVS --exclude .pc --exclude .hg --exclude .git
414 # ===========================================================================
415 # Rules shared between *config targets and build targets
417 # Basic helpers built in scripts/
418 PHONY += scripts_basic
420 $(Q)$(MAKE) $(build)=scripts/basic
421 $(Q)rm -f .tmp_quiet_recordmcount
423 # To avoid any implicit rule to kick in, define an empty command.
424 scripts/basic/%: scripts_basic ;
426 PHONY += outputmakefile
427 # outputmakefile generates a Makefile in the output directory, if using a
428 # separate output directory. This allows convenient use of make in the
431 ifneq ($(KBUILD_SRC),)
432 $(Q)ln -fsn $(srctree) source
433 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
434 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
437 # Support for using generic headers in asm-generic
440 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
441 src=asm obj=arch/$(SRCARCH)/include/generated/asm
442 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
443 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
445 # To make sure we do not include .config for any of the *config targets
446 # catch them early, and hand them over to scripts/kconfig/Makefile
447 # It is allowed to specify more targets when calling make, including
448 # mixing *config targets and build targets.
449 # For example 'make oldconfig all'.
450 # Detect when mixed targets is specified, and make a second invocation
451 # of make so .config is not included in this case either (for *config).
453 version_h := include/generated/uapi/linux/version.h
455 no-dot-config-targets := clean mrproper distclean \
456 cscope gtags TAGS tags help %docs check% coccicheck \
457 $(version_h) headers_% archheaders archscripts \
458 kernelversion %src-pkg
464 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
465 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
470 ifeq ($(KBUILD_EXTMOD),)
471 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
473 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
479 ifeq ($(mixed-targets),1)
480 # ===========================================================================
481 # We're called with mixed targets (*config and build targets).
482 # Handle them one by one.
485 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
488 ifeq ($(config-targets),1)
489 # ===========================================================================
490 # *config targets only - make sure prerequisites are updated, and descend
491 # in scripts/kconfig to make the *config target
493 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
494 # KBUILD_DEFCONFIG may point out an alternative default configuration
495 # used for 'make defconfig'
496 include $(srctree)/arch/$(SRCARCH)/Makefile
497 export KBUILD_DEFCONFIG KBUILD_KCONFIG
499 config: scripts_basic outputmakefile FORCE
500 $(Q)mkdir -p include/linux include/config
501 $(Q)$(MAKE) $(build)=scripts/kconfig $@
503 %config: scripts_basic outputmakefile FORCE
504 $(Q)mkdir -p include/linux include/config
505 $(Q)$(MAKE) $(build)=scripts/kconfig $@
508 # ===========================================================================
509 # Build targets only - this includes vmlinux, arch specific targets, clean
510 # targets and others. In general all targets except *config targets.
512 ifeq ($(KBUILD_EXTMOD),)
513 # Additional helpers built in scripts/
514 # Carefully list dependencies so we do not try to build scripts twice
517 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
518 $(Q)$(MAKE) $(build)=$(@)
520 # Objects we will link into vmlinux / subdirs we need to visit
522 drivers-y := drivers/ sound/ firmware/
526 endif # KBUILD_EXTMOD
528 ifeq ($(dot-config),1)
530 -include include/config/auto.conf
532 ifeq ($(KBUILD_EXTMOD),)
533 # Read in dependencies to all Kconfig* files, make sure to run
534 # oldconfig if changes are detected.
535 -include include/config/auto.conf.cmd
537 # To avoid any implicit rule to kick in, define an empty command
538 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
540 # If .config is newer than include/config/auto.conf, someone tinkered
541 # with it and forgot to run make oldconfig.
542 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
543 # we execute the config step to be sure to catch updated Kconfig files
544 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
545 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
547 # external modules needs include/generated/autoconf.h and include/config/auto.conf
548 # but do not care if they are up-to-date. Use auto.conf to trigger the test
549 PHONY += include/config/auto.conf
551 include/config/auto.conf:
552 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
554 echo >&2 " ERROR: Kernel configuration is invalid."; \
555 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
556 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
560 endif # KBUILD_EXTMOD
563 # Dummy target needed, because used as prerequisite
564 include/config/auto.conf: ;
565 endif # $(dot-config)
567 # The all: target is the default when no target is given on the
569 # This allow a user to issue only 'make' to build a kernel including modules
570 # Defaults to vmlinux, but the arch makefile usually adds further targets
573 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
579 include $(srctree)/arch/$(SRCARCH)/Makefile
581 ifdef CONFIG_READABLE_ASM
582 # Disable optimizations that make assembler listings hard to read.
583 # reorder blocks reorders the control in the function
584 # ipa clone creates specialized cloned functions
585 # partial inlining inlines only parts of functions
586 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
587 $(call cc-option,-fno-ipa-cp-clone,) \
588 $(call cc-option,-fno-partial-inlining)
591 ifneq ($(CONFIG_FRAME_WARN),0)
592 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
595 # Force gcc to behave correct even for buggy distributions
596 ifndef CONFIG_CC_STACKPROTECTOR
597 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
600 # This warning generated too much noise in a regular build.
601 # Use make W=1 to enable this warning (see scripts/Makefile.build)
602 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
604 ifdef CONFIG_FRAME_POINTER
605 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
607 # Some targets (ARM with Thumb2, for example), can't be built with frame
608 # pointers. For those, we don't have FUNCTION_TRACER automatically
609 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
610 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
611 # -fomit-frame-pointer with FUNCTION_TRACER.
612 ifndef CONFIG_FUNCTION_TRACER
613 KBUILD_CFLAGS += -fomit-frame-pointer
617 ifdef CONFIG_DEBUG_INFO
619 KBUILD_AFLAGS += -gdwarf-2
622 ifdef CONFIG_DEBUG_INFO_REDUCED
623 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
626 ifdef CONFIG_FUNCTION_TRACER
627 ifdef CONFIG_HAVE_FENTRY
628 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
630 KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
631 KBUILD_AFLAGS += $(CC_USING_FENTRY)
632 ifdef CONFIG_DYNAMIC_FTRACE
633 ifdef CONFIG_HAVE_C_RECORDMCOUNT
634 BUILD_C_RECORDMCOUNT := y
635 export BUILD_C_RECORDMCOUNT
640 # We trigger additional mismatches with less inlining
641 ifdef CONFIG_DEBUG_SECTION_MISMATCH
642 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
645 # arch Makefile may override CC so keep this after arch Makefile is included
646 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
647 CHECKFLAGS += $(NOSTDINC_FLAGS)
649 # warn about C99 declaration after statement
650 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
652 # disable pointer signed / unsigned warnings in gcc 4.0
653 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
655 # disable invalid "can't wrap" optimizations for signed / pointers
656 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
658 # conserve stack if available
659 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
661 # use the deterministic mode of AR if available
662 KBUILD_ARFLAGS := $(call ar-option,D)
664 # check for 'asm goto'
665 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
666 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
669 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
670 KBUILD_CPPFLAGS += $(KCPPFLAGS)
671 KBUILD_AFLAGS += $(KAFLAGS)
672 KBUILD_CFLAGS += $(KCFLAGS)
674 # Use --build-id when available.
675 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
676 $(call cc-ldoption, -Wl$(comma)--build-id,))
677 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
678 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
680 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
681 LDFLAGS_vmlinux += $(call ld-option, -X,)
684 # Default kernel image to build when no specific target is given.
685 # KBUILD_IMAGE may be overruled on the command line or
686 # set in the environment
687 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
689 export KBUILD_IMAGE ?= vmlinux
692 # INSTALL_PATH specifies where to place the updated kernel and system map
693 # images. Default is /boot, but you can set it to other values
694 export INSTALL_PATH ?= /boot
697 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
698 # relocations required by build roots. This is not defined in the
699 # makefile but the argument can be passed to make if needed.
702 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
706 # INSTALL_MOD_STRIP, if defined, will cause modules to be
707 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
708 # the default option --strip-debug will be used. Otherwise,
709 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
711 ifdef INSTALL_MOD_STRIP
712 ifeq ($(INSTALL_MOD_STRIP),1)
713 mod_strip_cmd = $(STRIP) --strip-debug
715 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
716 endif # INSTALL_MOD_STRIP=1
719 endif # INSTALL_MOD_STRIP
723 ifeq ($(CONFIG_MODULE_SIG),y)
724 MODSECKEY = ./signing_key.priv
725 MODPUBKEY = ./signing_key.x509
727 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(MODSECKEY) $(MODPUBKEY)
734 ifeq ($(KBUILD_EXTMOD),)
735 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
737 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
738 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
739 $(net-y) $(net-m) $(libs-y) $(libs-m)))
741 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
743 $(core-n) $(core-) $(drivers-n) $(drivers-) \
744 $(net-n) $(net-) $(libs-n) $(libs-))))
746 init-y := $(patsubst %/, %/built-in.o, $(init-y))
747 core-y := $(patsubst %/, %/built-in.o, $(core-y))
748 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
749 net-y := $(patsubst %/, %/built-in.o, $(net-y))
750 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
751 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
752 libs-y := $(libs-y1) $(libs-y2)
754 # Externally visible symbols (used by link-vmlinux.sh)
755 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
756 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
757 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
758 export LDFLAGS_vmlinux
760 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
762 # Final link of vmlinux
763 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
764 quiet_cmd_link-vmlinux = LINK $@
766 # Include targets which we want to
767 # execute if the rest of the kernel build went well.
768 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
769 ifdef CONFIG_HEADERS_CHECK
770 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
773 $(Q)$(MAKE) $(build)=samples
775 ifdef CONFIG_BUILD_DOCSRC
776 $(Q)$(MAKE) $(build)=Documentation
778 +$(call if_changed,link-vmlinux)
780 # The actual objects are generated when descending,
781 # make sure no implicit rule kicks in
782 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
784 # Handle descending into subdirectories listed in $(vmlinux-dirs)
785 # Preset locale variables to speed up the build process. Limit locale
786 # tweaks to this spot to avoid wrong language settings when running
787 # make menuconfig etc.
788 # Error messages still appears in the original language
790 PHONY += $(vmlinux-dirs)
791 $(vmlinux-dirs): prepare scripts
792 $(Q)$(MAKE) $(build)=$@
794 # Store (new) KERNELRELASE string in include/config/kernel.release
795 include/config/kernel.release: include/config/auto.conf FORCE
797 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
800 # Things we need to do before we recursively start building the kernel
801 # or the modules are listed in "prepare".
802 # A multi level approach is used. prepareN is processed before prepareN-1.
803 # archprepare is used in arch Makefiles and when processed asm symlink,
804 # version.h and scripts_basic is processed / created.
806 # Listed in dependency order
807 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
809 # prepare3 is used to check if we are building in a separate output directory,
811 # 1) Check that make has not been executed in the kernel src $(srctree)
812 prepare3: include/config/kernel.release
813 ifneq ($(KBUILD_SRC),)
814 @$(kecho) ' Using $(srctree) as source for kernel'
815 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
816 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
817 echo >&2 " in the '$(srctree)' directory.";\
822 # prepare2 creates a makefile if using a separate output directory
823 prepare2: prepare3 outputmakefile asm-generic
825 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
826 include/config/auto.conf
829 archprepare: archheaders archscripts prepare1 scripts_basic
831 prepare0: archprepare FORCE
832 $(Q)$(MAKE) $(build)=.
834 # All the preparing..
837 # Generate some files
838 # ---------------------------------------------------------------------------
840 # KERNELRELEASE can change from a few different places, meaning version.h
841 # needs to be updated, so this check is forced on all builds
844 define filechk_utsrelease.h
845 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
846 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
849 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
852 define filechk_version.h
853 (echo \#define LINUX_VERSION_CODE $(shell \
854 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
855 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
858 $(version_h): $(srctree)/Makefile FORCE
859 $(call filechk,version.h)
861 include/generated/utsrelease.h: include/config/kernel.release FORCE
862 $(call filechk,utsrelease.h)
866 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
867 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
869 # ---------------------------------------------------------------------------
873 @echo '*** Warning: make $@ is unnecessary now.'
875 # ---------------------------------------------------------------------------
877 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
878 export INSTALL_FW_PATH
880 PHONY += firmware_install
881 firmware_install: FORCE
882 @mkdir -p $(objtree)/firmware
883 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
885 # ---------------------------------------------------------------------------
888 #Default location for installed headers
889 export INSTALL_HDR_PATH = $(objtree)/usr
891 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
893 # If we do an all arch process set dst to asm-$(hdr-arch)
894 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
903 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
904 $(Q)$(MAKE) $(build)=scripts build_unifdef
906 PHONY += headers_install_all
908 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
910 PHONY += headers_install
911 headers_install: __headers
912 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
913 $(error Headers not exportable for the $(SRCARCH) architecture))
914 $(Q)$(MAKE) $(hdr-inst)=include/uapi
915 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
917 PHONY += headers_check_all
918 headers_check_all: headers_install_all
919 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
921 PHONY += headers_check
922 headers_check: headers_install
923 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
924 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
926 # ---------------------------------------------------------------------------
931 # By default, build modules as well
937 # A module can be listed more than once in obj-m resulting in
938 # duplicate lines in modules.order files. Those are removed
939 # using awk while concatenating to the final file.
942 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
943 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
944 @$(kecho) ' Building modules, stage 2.';
945 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
946 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
948 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
949 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
951 %/modules.builtin: include/config/auto.conf
952 $(Q)$(MAKE) $(modbuiltin)=$*
955 # Target to prepare building external modules
956 PHONY += modules_prepare
957 modules_prepare: prepare scripts
959 # Target to install modules
960 PHONY += modules_install
961 modules_install: _modinst_ _modinst_post
965 @rm -rf $(MODLIB)/kernel
966 @rm -f $(MODLIB)/source
967 @mkdir -p $(MODLIB)/kernel
968 @ln -s $(srctree) $(MODLIB)/source
969 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
970 rm -f $(MODLIB)/build ; \
971 ln -s $(objtree) $(MODLIB)/build ; \
973 @cp -f $(objtree)/modules.order $(MODLIB)/
974 @cp -f $(objtree)/modules.builtin $(MODLIB)/
975 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
977 # This depmod is only for convenience to give the initial
978 # boot a modules.dep even before / is mounted read-write. However the
979 # boot script depmod is the master version.
980 PHONY += _modinst_post
981 _modinst_post: _modinst_
982 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
985 ifeq ($(CONFIG_MODULE_SIG), y)
986 PHONY += modules_sign
988 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
991 else # CONFIG_MODULES
993 # Modules not configured
994 # ---------------------------------------------------------------------------
996 modules modules_install: FORCE
998 @echo >&2 "The present kernel configuration has modules disabled."
999 @echo >&2 "Type 'make config' and enable loadable module support."
1000 @echo >&2 "Then build a kernel with module support enabled."
1004 endif # CONFIG_MODULES
1007 # Cleaning is done on three levels.
1008 # make clean Delete most generated files
1009 # Leave enough to build external modules
1010 # make mrproper Delete the current configuration, and all generated files
1011 # make distclean Remove editor backup files, patch leftover files and the like
1013 # Directories & files removed with 'make clean'
1014 CLEAN_DIRS += $(MODVERDIR)
1016 # Directories & files removed with 'make mrproper'
1017 MRPROPER_DIRS += include/config usr/include include/generated \
1018 arch/*/include/generated
1019 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1020 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1021 signing_key.priv signing_key.x509 x509.genkey \
1022 extra_certificates signing_key.x509.keyid \
1023 signing_key.x509.signer
1025 # clean - Delete most, but leave enough to build external modules
1027 clean: rm-dirs := $(CLEAN_DIRS)
1028 clean: rm-files := $(CLEAN_FILES)
1029 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1031 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1033 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1036 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1038 clean: archclean vmlinuxclean
1040 # mrproper - Delete all generated files, including .config
1042 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1043 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1044 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1046 PHONY += $(mrproper-dirs) mrproper archmrproper
1048 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1050 mrproper: clean archmrproper $(mrproper-dirs)
1059 @find $(srctree) $(RCS_FIND_IGNORE) \
1060 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1061 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1063 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1064 -type f -print | xargs rm -f
1067 # Packaging of the kernel to various formats
1068 # ---------------------------------------------------------------------------
1069 # rpm target kept for backward compatibility
1070 package-dir := $(srctree)/scripts/package
1073 $(Q)$(MAKE) $(build)=$(package-dir) $@
1074 %pkg: include/config/kernel.release FORCE
1075 $(Q)$(MAKE) $(build)=$(package-dir) $@
1076 rpm: include/config/kernel.release FORCE
1077 $(Q)$(MAKE) $(build)=$(package-dir) $@
1080 # Brief documentation of the typical targets used
1081 # ---------------------------------------------------------------------------
1083 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1084 boards := $(notdir $(boards))
1085 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1086 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1089 @echo 'Cleaning targets:'
1090 @echo ' clean - Remove most generated files but keep the config and'
1091 @echo ' enough build support to build external modules'
1092 @echo ' mrproper - Remove all generated files + config + various backup files'
1093 @echo ' distclean - mrproper + remove editor backup and patch files'
1095 @echo 'Configuration targets:'
1096 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1098 @echo 'Other generic targets:'
1099 @echo ' all - Build all targets marked with [*]'
1100 @echo '* vmlinux - Build the bare kernel'
1101 @echo '* modules - Build all modules'
1102 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1103 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1104 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1105 @echo ' dir/ - Build all files in dir and below'
1106 @echo ' dir/file.[oisS] - Build specified target only'
1107 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1108 @echo ' (requires a recent binutils and recent build (System.map))'
1109 @echo ' dir/file.ko - Build module including final link'
1110 @echo ' modules_prepare - Set up for building external modules'
1111 @echo ' tags/TAGS - Generate tags file for editors'
1112 @echo ' cscope - Generate cscope index'
1113 @echo ' gtags - Generate GNU GLOBAL index'
1114 @echo ' kernelrelease - Output the release version string'
1115 @echo ' kernelversion - Output the version stored in Makefile'
1116 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1117 echo ' (default: $(INSTALL_HDR_PATH))'; \
1119 @echo 'Static analysers'
1120 @echo ' checkstack - Generate a list of stack hogs'
1121 @echo ' namespacecheck - Name space analysis on compiled kernel'
1122 @echo ' versioncheck - Sanity check on version.h usage'
1123 @echo ' includecheck - Check for duplicate included header files'
1124 @echo ' export_report - List the usages of all exported symbols'
1125 @echo ' headers_check - Sanity check on exported headers'
1126 @echo ' headerdep - Detect inclusion cycles in headers'
1127 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1129 @echo 'Kernel packaging:'
1130 @$(MAKE) $(build)=$(package-dir) help
1132 @echo 'Documentation targets:'
1133 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1135 @echo 'Architecture specific targets ($(SRCARCH)):'
1136 @$(if $(archhelp),$(archhelp),\
1137 echo ' No architecture specific help defined for $(SRCARCH)')
1140 $(foreach b, $(boards), \
1141 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1143 @$(if $(board-dirs), \
1144 $(foreach b, $(board-dirs), \
1145 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1146 printf " %-16s - Show all of the above\\n" help-boards; \
1149 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1150 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1151 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1152 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1153 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1154 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1155 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1156 @echo ' 1: warnings which may be relevant and do not occur too often'
1157 @echo ' 2: warnings which occur quite often but may still be relevant'
1158 @echo ' 3: more obscure warnings, can most likely be ignored'
1159 @echo ' Multiple levels can be combined with W=12 or W=123'
1161 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1162 @echo 'For further info see the ./README file'
1165 help-board-dirs := $(addprefix help-,$(board-dirs))
1167 help-boards: $(help-board-dirs)
1169 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1171 $(help-board-dirs): help-%:
1172 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1173 @$(if $(boards-per-dir), \
1174 $(foreach b, $(boards-per-dir), \
1175 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1179 # Documentation targets
1180 # ---------------------------------------------------------------------------
1181 %docs: scripts_basic FORCE
1182 $(Q)$(MAKE) $(build)=scripts build_docproc
1183 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1185 else # KBUILD_EXTMOD
1188 # External module support.
1189 # When building external modules the kernel used as basis is considered
1190 # read-only, and no consistency checks are made and the make
1191 # system is not used on the basis kernel. If updates are required
1192 # in the basis kernel ordinary make commands (without M=...) must
1195 # The following are the only valid targets when building external
1197 # make M=dir clean Delete all automatically generated files
1198 # make M=dir modules Make all modules in specified dir
1199 # make M=dir Same as 'make M=dir modules'
1200 # make M=dir modules_install
1201 # Install the modules built in the module directory
1202 # Assumes install directory is already created
1204 # We are always building modules
1206 PHONY += crmodverdir
1210 PHONY += $(objtree)/Module.symvers
1211 $(objtree)/Module.symvers:
1212 @test -e $(objtree)/Module.symvers || ( \
1214 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1215 echo " is missing; modules will have no dependencies and modversions."; \
1218 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1219 PHONY += $(module-dirs) modules
1220 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1221 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1223 modules: $(module-dirs)
1224 @$(kecho) ' Building modules, stage 2.';
1225 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1227 PHONY += modules_install
1228 modules_install: _emodinst_ _emodinst_post
1230 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1233 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1234 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1236 PHONY += _emodinst_post
1237 _emodinst_post: _emodinst_
1240 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1242 PHONY += $(clean-dirs) clean
1244 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1246 clean: rm-dirs := $(MODVERDIR)
1247 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1250 @echo ' Building external modules.'
1251 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1253 @echo ' modules - default target, build the module(s)'
1254 @echo ' modules_install - install the module'
1255 @echo ' clean - remove generated files in module directory only'
1259 PHONY += prepare scripts
1262 endif # KBUILD_EXTMOD
1264 clean: $(clean-dirs)
1267 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1268 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1270 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1271 -o -name '*.symtypes' -o -name 'modules.order' \
1272 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1273 -o -name '*.gcno' \) -type f -print | xargs rm -f
1275 # Generate tags for editors
1276 # ---------------------------------------------------------------------------
1277 quiet_cmd_tags = GEN $@
1278 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1280 tags TAGS cscope gtags: FORCE
1283 # Scripts to check various things for consistency
1284 # ---------------------------------------------------------------------------
1286 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1289 find $(srctree)/* $(RCS_FIND_IGNORE) \
1290 -name '*.[hcS]' -type f -print | sort \
1291 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1294 find $(srctree)/* $(RCS_FIND_IGNORE) \
1295 -name '*.[hcS]' -type f -print | sort \
1296 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1299 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1302 $(PERL) $(srctree)/scripts/namespace.pl
1305 $(PERL) $(srctree)/scripts/export_report.pl
1307 endif #ifeq ($(config-targets),1)
1308 endif #ifeq ($(mixed-targets),1)
1310 PHONY += checkstack kernelrelease kernelversion
1312 # UML needs a little special treatment here. It wants to use the host
1313 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1314 # else wants $(ARCH), including people doing cross-builds, which means
1315 # that $(SUBARCH) doesn't work here.
1317 CHECKSTACK_ARCH := $(SUBARCH)
1319 CHECKSTACK_ARCH := $(ARCH)
1322 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1323 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1326 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1329 @echo $(KERNELVERSION)
1331 # Clear a bunch of variables before executing the submake
1333 $(Q)mkdir -p $(objtree)/tools
1334 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/
1337 $(Q)mkdir -p $(objtree)/tools
1338 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ $*
1341 # ---------------------------------------------------------------------------
1342 # Single targets are compatible with:
1343 # - build with mixed source and output
1344 # - build with separate output dir 'make O=...'
1345 # - external modules
1347 # target-dir => where to store outputfile
1348 # build-dir => directory in kernel source tree to use
1350 ifeq ($(KBUILD_EXTMOD),)
1351 build-dir = $(patsubst %/,%,$(dir $@))
1352 target-dir = $(dir $@)
1354 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1355 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1356 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1359 %.s: %.c prepare scripts FORCE
1360 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1361 %.i: %.c prepare scripts FORCE
1362 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1363 %.o: %.c prepare scripts FORCE
1364 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1365 %.lst: %.c prepare scripts FORCE
1366 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1367 %.s: %.S prepare scripts FORCE
1368 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1369 %.o: %.S prepare scripts FORCE
1370 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1371 %.symtypes: %.c prepare scripts FORCE
1372 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1375 /: prepare scripts FORCE
1377 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1378 $(build)=$(build-dir)
1379 %/: prepare scripts FORCE
1381 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1382 $(build)=$(build-dir)
1383 %.ko: prepare scripts FORCE
1385 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1386 $(build)=$(build-dir) $(@:.ko=.o)
1387 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1389 # FIXME Should go into a make.lib or something
1390 # ===========================================================================
1392 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1393 cmd_rmdirs = rm -rf $(rm-dirs)
1395 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1396 cmd_rmfiles = rm -f $(rm-files)
1398 # Run depmod only if we have System.map and depmod is executable
1399 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1400 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1403 # Create temporary dir for module support files
1404 # clean it up only when building all modules
1405 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1406 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1408 # read all saved command lines
1410 targets := $(wildcard $(sort $(targets)))
1411 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1413 ifneq ($(cmd_files),)
1414 $(cmd_files): ; # Do not try to update included dependency files
1415 include $(cmd_files)
1418 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1420 # $(Q)$(MAKE) $(clean)=dir
1421 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1423 endif # skip-makefile
1428 # Declare the contents of the .PHONY variable as phony. We keep that
1429 # information in a variable so we can use it in if_changed and friends.