5 NAME = One Giant Leap for Frogkind
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
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 $(srctree)/scripts/Makefile.asm-generic \
440 src=asm obj=arch/$(SRCARCH)/include/generated/asm
441 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
442 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
444 # To make sure we do not include .config for any of the *config targets
445 # catch them early, and hand them over to scripts/kconfig/Makefile
446 # It is allowed to specify more targets when calling make, including
447 # mixing *config targets and build targets.
448 # For example 'make oldconfig all'.
449 # Detect when mixed targets is specified, and make a second invocation
450 # of make so .config is not included in this case either (for *config).
452 version_h := include/generated/uapi/linux/version.h
454 no-dot-config-targets := clean mrproper distclean \
455 cscope gtags TAGS tags help %docs check% coccicheck \
456 $(version_h) headers_% archheaders archscripts \
457 kernelversion %src-pkg
463 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
464 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
469 ifeq ($(KBUILD_EXTMOD),)
470 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
472 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
478 ifeq ($(mixed-targets),1)
479 # ===========================================================================
480 # We're called with mixed targets (*config and build targets).
481 # Handle them one by one.
484 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
487 ifeq ($(config-targets),1)
488 # ===========================================================================
489 # *config targets only - make sure prerequisites are updated, and descend
490 # in scripts/kconfig to make the *config target
492 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
493 # KBUILD_DEFCONFIG may point out an alternative default configuration
494 # used for 'make defconfig'
495 include $(srctree)/arch/$(SRCARCH)/Makefile
496 export KBUILD_DEFCONFIG KBUILD_KCONFIG
498 config: scripts_basic outputmakefile FORCE
499 $(Q)mkdir -p include/linux include/config
500 $(Q)$(MAKE) $(build)=scripts/kconfig $@
502 %config: scripts_basic outputmakefile FORCE
503 $(Q)mkdir -p include/linux include/config
504 $(Q)$(MAKE) $(build)=scripts/kconfig $@
507 # ===========================================================================
508 # Build targets only - this includes vmlinux, arch specific targets, clean
509 # targets and others. In general all targets except *config targets.
511 ifeq ($(KBUILD_EXTMOD),)
512 # Additional helpers built in scripts/
513 # Carefully list dependencies so we do not try to build scripts twice
516 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
574 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
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) \
624 $(call cc-option,-fno-var-tracking)
627 ifdef CONFIG_FUNCTION_TRACER
628 ifdef CONFIG_HAVE_FENTRY
629 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
631 KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
632 KBUILD_AFLAGS += $(CC_USING_FENTRY)
633 ifdef CONFIG_DYNAMIC_FTRACE
634 ifdef CONFIG_HAVE_C_RECORDMCOUNT
635 BUILD_C_RECORDMCOUNT := y
636 export BUILD_C_RECORDMCOUNT
641 # We trigger additional mismatches with less inlining
642 ifdef CONFIG_DEBUG_SECTION_MISMATCH
643 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
646 # arch Makefile may override CC so keep this after arch Makefile is included
647 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
648 CHECKFLAGS += $(NOSTDINC_FLAGS)
650 # warn about C99 declaration after statement
651 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
653 # disable pointer signed / unsigned warnings in gcc 4.0
654 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
656 # disable invalid "can't wrap" optimizations for signed / pointers
657 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
659 # conserve stack if available
660 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
662 # disallow errors like 'EXPORT_GPL(foo);' with missing header
663 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
665 # require functions to have arguments in prototypes, not empty 'int foo()'
666 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
668 # use the deterministic mode of AR if available
669 KBUILD_ARFLAGS := $(call ar-option,D)
671 # check for 'asm goto'
672 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
673 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
676 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
677 KBUILD_CPPFLAGS += $(KCPPFLAGS)
678 KBUILD_AFLAGS += $(KAFLAGS)
679 KBUILD_CFLAGS += $(KCFLAGS)
681 # Use --build-id when available.
682 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
683 $(call cc-ldoption, -Wl$(comma)--build-id,))
684 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
685 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
687 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
688 LDFLAGS_vmlinux += $(call ld-option, -X,)
691 # Default kernel image to build when no specific target is given.
692 # KBUILD_IMAGE may be overruled on the command line or
693 # set in the environment
694 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
696 export KBUILD_IMAGE ?= vmlinux
699 # INSTALL_PATH specifies where to place the updated kernel and system map
700 # images. Default is /boot, but you can set it to other values
701 export INSTALL_PATH ?= /boot
704 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
705 # relocations required by build roots. This is not defined in the
706 # makefile but the argument can be passed to make if needed.
709 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
713 # INSTALL_MOD_STRIP, if defined, will cause modules to be
714 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
715 # the default option --strip-debug will be used. Otherwise,
716 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
718 ifdef INSTALL_MOD_STRIP
719 ifeq ($(INSTALL_MOD_STRIP),1)
720 mod_strip_cmd = $(STRIP) --strip-debug
722 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
723 endif # INSTALL_MOD_STRIP=1
726 endif # INSTALL_MOD_STRIP
730 ifdef CONFIG_MODULE_SIG_ALL
731 MODSECKEY = ./signing_key.priv
732 MODPUBKEY = ./signing_key.x509
734 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
741 ifeq ($(KBUILD_EXTMOD),)
742 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
744 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
745 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
746 $(net-y) $(net-m) $(libs-y) $(libs-m)))
748 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
750 $(core-n) $(core-) $(drivers-n) $(drivers-) \
751 $(net-n) $(net-) $(libs-n) $(libs-))))
753 init-y := $(patsubst %/, %/built-in.o, $(init-y))
754 core-y := $(patsubst %/, %/built-in.o, $(core-y))
755 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
756 net-y := $(patsubst %/, %/built-in.o, $(net-y))
757 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
758 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
759 libs-y := $(libs-y1) $(libs-y2)
761 # Externally visible symbols (used by link-vmlinux.sh)
762 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
763 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
764 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
765 export LDFLAGS_vmlinux
766 # used by scripts/pacmage/Makefile
767 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
769 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
771 # Final link of vmlinux
772 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
773 quiet_cmd_link-vmlinux = LINK $@
775 # Include targets which we want to
776 # execute if the rest of the kernel build went well.
777 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
778 ifdef CONFIG_HEADERS_CHECK
779 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
782 $(Q)$(MAKE) $(build)=samples
784 ifdef CONFIG_BUILD_DOCSRC
785 $(Q)$(MAKE) $(build)=Documentation
787 +$(call if_changed,link-vmlinux)
789 # The actual objects are generated when descending,
790 # make sure no implicit rule kicks in
791 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
793 # Handle descending into subdirectories listed in $(vmlinux-dirs)
794 # Preset locale variables to speed up the build process. Limit locale
795 # tweaks to this spot to avoid wrong language settings when running
796 # make menuconfig etc.
797 # Error messages still appears in the original language
799 PHONY += $(vmlinux-dirs)
800 $(vmlinux-dirs): prepare scripts
801 $(Q)$(MAKE) $(build)=$@
803 define filechk_kernel.release
804 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
807 # Store (new) KERNELRELEASE string in include/config/kernel.release
808 include/config/kernel.release: include/config/auto.conf FORCE
809 $(call filechk,kernel.release)
812 # Things we need to do before we recursively start building the kernel
813 # or the modules are listed in "prepare".
814 # A multi level approach is used. prepareN is processed before prepareN-1.
815 # archprepare is used in arch Makefiles and when processed asm symlink,
816 # version.h and scripts_basic is processed / created.
818 # Listed in dependency order
819 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
821 # prepare3 is used to check if we are building in a separate output directory,
823 # 1) Check that make has not been executed in the kernel src $(srctree)
824 prepare3: include/config/kernel.release
825 ifneq ($(KBUILD_SRC),)
826 @$(kecho) ' Using $(srctree) as source for kernel'
827 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
828 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
829 echo >&2 " in the '$(srctree)' directory.";\
834 # prepare2 creates a makefile if using a separate output directory
835 prepare2: prepare3 outputmakefile asm-generic
837 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
838 include/config/auto.conf
841 archprepare: archheaders archscripts prepare1 scripts_basic
843 prepare0: archprepare FORCE
844 $(Q)$(MAKE) $(build)=.
846 # All the preparing..
849 # Generate some files
850 # ---------------------------------------------------------------------------
852 # KERNELRELEASE can change from a few different places, meaning version.h
853 # needs to be updated, so this check is forced on all builds
856 define filechk_utsrelease.h
857 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
858 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
861 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
864 define filechk_version.h
865 (echo \#define LINUX_VERSION_CODE $(shell \
866 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
867 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
870 $(version_h): $(srctree)/Makefile FORCE
871 $(call filechk,version.h)
873 include/generated/utsrelease.h: include/config/kernel.release FORCE
874 $(call filechk,utsrelease.h)
878 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
879 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
881 # ---------------------------------------------------------------------------
885 @echo '*** Warning: make $@ is unnecessary now.'
887 # ---------------------------------------------------------------------------
889 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
890 export INSTALL_FW_PATH
892 PHONY += firmware_install
893 firmware_install: FORCE
894 @mkdir -p $(objtree)/firmware
895 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
897 # ---------------------------------------------------------------------------
900 #Default location for installed headers
901 export INSTALL_HDR_PATH = $(objtree)/usr
903 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
905 # If we do an all arch process set dst to asm-$(hdr-arch)
906 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
915 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
916 $(Q)$(MAKE) $(build)=scripts build_unifdef
918 PHONY += headers_install_all
920 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
922 PHONY += headers_install
923 headers_install: __headers
924 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
925 $(error Headers not exportable for the $(SRCARCH) architecture))
926 $(Q)$(MAKE) $(hdr-inst)=include/uapi
927 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
929 PHONY += headers_check_all
930 headers_check_all: headers_install_all
931 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
933 PHONY += headers_check
934 headers_check: headers_install
935 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
936 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
938 # ---------------------------------------------------------------------------
943 # By default, build modules as well
949 # A module can be listed more than once in obj-m resulting in
950 # duplicate lines in modules.order files. Those are removed
951 # using awk while concatenating to the final file.
954 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
955 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
956 @$(kecho) ' Building modules, stage 2.';
957 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
958 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
960 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
961 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
963 %/modules.builtin: include/config/auto.conf
964 $(Q)$(MAKE) $(modbuiltin)=$*
967 # Target to prepare building external modules
968 PHONY += modules_prepare
969 modules_prepare: prepare scripts
971 # Target to install modules
972 PHONY += modules_install
973 modules_install: _modinst_ _modinst_post
977 @rm -rf $(MODLIB)/kernel
978 @rm -f $(MODLIB)/source
979 @mkdir -p $(MODLIB)/kernel
980 @ln -s $(srctree) $(MODLIB)/source
981 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
982 rm -f $(MODLIB)/build ; \
983 ln -s $(objtree) $(MODLIB)/build ; \
985 @cp -f $(objtree)/modules.order $(MODLIB)/
986 @cp -f $(objtree)/modules.builtin $(MODLIB)/
987 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
989 # This depmod is only for convenience to give the initial
990 # boot a modules.dep even before / is mounted read-write. However the
991 # boot script depmod is the master version.
992 PHONY += _modinst_post
993 _modinst_post: _modinst_
994 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
997 ifeq ($(CONFIG_MODULE_SIG), y)
998 PHONY += modules_sign
1000 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1003 else # CONFIG_MODULES
1005 # Modules not configured
1006 # ---------------------------------------------------------------------------
1008 modules modules_install: FORCE
1010 @echo >&2 "The present kernel configuration has modules disabled."
1011 @echo >&2 "Type 'make config' and enable loadable module support."
1012 @echo >&2 "Then build a kernel with module support enabled."
1016 endif # CONFIG_MODULES
1019 # Cleaning is done on three levels.
1020 # make clean Delete most generated files
1021 # Leave enough to build external modules
1022 # make mrproper Delete the current configuration, and all generated files
1023 # make distclean Remove editor backup files, patch leftover files and the like
1025 # Directories & files removed with 'make clean'
1026 CLEAN_DIRS += $(MODVERDIR)
1028 # Directories & files removed with 'make mrproper'
1029 MRPROPER_DIRS += include/config usr/include include/generated \
1030 arch/*/include/generated
1031 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1032 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1033 signing_key.priv signing_key.x509 x509.genkey \
1034 extra_certificates signing_key.x509.keyid \
1035 signing_key.x509.signer
1037 # clean - Delete most, but leave enough to build external modules
1039 clean: rm-dirs := $(CLEAN_DIRS)
1040 clean: rm-files := $(CLEAN_FILES)
1041 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1043 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1045 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1048 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1050 clean: archclean vmlinuxclean
1052 # mrproper - Delete all generated files, including .config
1054 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1055 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1056 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1058 PHONY += $(mrproper-dirs) mrproper archmrproper
1060 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1062 mrproper: clean archmrproper $(mrproper-dirs)
1071 @find $(srctree) $(RCS_FIND_IGNORE) \
1072 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1073 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1075 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1076 -type f -print | xargs rm -f
1079 # Packaging of the kernel to various formats
1080 # ---------------------------------------------------------------------------
1081 # rpm target kept for backward compatibility
1082 package-dir := $(srctree)/scripts/package
1085 $(Q)$(MAKE) $(build)=$(package-dir) $@
1086 %pkg: include/config/kernel.release FORCE
1087 $(Q)$(MAKE) $(build)=$(package-dir) $@
1088 rpm: include/config/kernel.release FORCE
1089 $(Q)$(MAKE) $(build)=$(package-dir) $@
1092 # Brief documentation of the typical targets used
1093 # ---------------------------------------------------------------------------
1095 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1096 boards := $(notdir $(boards))
1097 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1098 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1101 @echo 'Cleaning targets:'
1102 @echo ' clean - Remove most generated files but keep the config and'
1103 @echo ' enough build support to build external modules'
1104 @echo ' mrproper - Remove all generated files + config + various backup files'
1105 @echo ' distclean - mrproper + remove editor backup and patch files'
1107 @echo 'Configuration targets:'
1108 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1110 @echo 'Other generic targets:'
1111 @echo ' all - Build all targets marked with [*]'
1112 @echo '* vmlinux - Build the bare kernel'
1113 @echo '* modules - Build all modules'
1114 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1115 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1116 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1117 @echo ' dir/ - Build all files in dir and below'
1118 @echo ' dir/file.[oisS] - Build specified target only'
1119 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1120 @echo ' (requires a recent binutils and recent build (System.map))'
1121 @echo ' dir/file.ko - Build module including final link'
1122 @echo ' modules_prepare - Set up for building external modules'
1123 @echo ' tags/TAGS - Generate tags file for editors'
1124 @echo ' cscope - Generate cscope index'
1125 @echo ' gtags - Generate GNU GLOBAL index'
1126 @echo ' kernelrelease - Output the release version string'
1127 @echo ' kernelversion - Output the version stored in Makefile'
1128 @echo ' image_name - Output the image name'
1129 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1130 echo ' (default: $(INSTALL_HDR_PATH))'; \
1132 @echo 'Static analysers'
1133 @echo ' checkstack - Generate a list of stack hogs'
1134 @echo ' namespacecheck - Name space analysis on compiled kernel'
1135 @echo ' versioncheck - Sanity check on version.h usage'
1136 @echo ' includecheck - Check for duplicate included header files'
1137 @echo ' export_report - List the usages of all exported symbols'
1138 @echo ' headers_check - Sanity check on exported headers'
1139 @echo ' headerdep - Detect inclusion cycles in headers'
1140 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1142 @echo 'Kernel packaging:'
1143 @$(MAKE) $(build)=$(package-dir) help
1145 @echo 'Documentation targets:'
1146 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1148 @echo 'Architecture specific targets ($(SRCARCH)):'
1149 @$(if $(archhelp),$(archhelp),\
1150 echo ' No architecture specific help defined for $(SRCARCH)')
1153 $(foreach b, $(boards), \
1154 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1156 @$(if $(board-dirs), \
1157 $(foreach b, $(board-dirs), \
1158 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1159 printf " %-16s - Show all of the above\\n" help-boards; \
1162 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1163 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1164 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1165 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1166 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1167 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1168 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1169 @echo ' 1: warnings which may be relevant and do not occur too often'
1170 @echo ' 2: warnings which occur quite often but may still be relevant'
1171 @echo ' 3: more obscure warnings, can most likely be ignored'
1172 @echo ' Multiple levels can be combined with W=12 or W=123'
1174 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1175 @echo 'For further info see the ./README file'
1178 help-board-dirs := $(addprefix help-,$(board-dirs))
1180 help-boards: $(help-board-dirs)
1182 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1184 $(help-board-dirs): help-%:
1185 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1186 @$(if $(boards-per-dir), \
1187 $(foreach b, $(boards-per-dir), \
1188 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1192 # Documentation targets
1193 # ---------------------------------------------------------------------------
1194 %docs: scripts_basic FORCE
1195 $(Q)$(MAKE) $(build)=scripts build_docproc
1196 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1198 else # KBUILD_EXTMOD
1201 # External module support.
1202 # When building external modules the kernel used as basis is considered
1203 # read-only, and no consistency checks are made and the make
1204 # system is not used on the basis kernel. If updates are required
1205 # in the basis kernel ordinary make commands (without M=...) must
1208 # The following are the only valid targets when building external
1210 # make M=dir clean Delete all automatically generated files
1211 # make M=dir modules Make all modules in specified dir
1212 # make M=dir Same as 'make M=dir modules'
1213 # make M=dir modules_install
1214 # Install the modules built in the module directory
1215 # Assumes install directory is already created
1217 # We are always building modules
1219 PHONY += crmodverdir
1223 PHONY += $(objtree)/Module.symvers
1224 $(objtree)/Module.symvers:
1225 @test -e $(objtree)/Module.symvers || ( \
1227 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1228 echo " is missing; modules will have no dependencies and modversions."; \
1231 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1232 PHONY += $(module-dirs) modules
1233 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1234 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1236 modules: $(module-dirs)
1237 @$(kecho) ' Building modules, stage 2.';
1238 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1240 PHONY += modules_install
1241 modules_install: _emodinst_ _emodinst_post
1243 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1246 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1247 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1249 PHONY += _emodinst_post
1250 _emodinst_post: _emodinst_
1253 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1255 PHONY += $(clean-dirs) clean
1257 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1259 clean: rm-dirs := $(MODVERDIR)
1260 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1263 @echo ' Building external modules.'
1264 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1266 @echo ' modules - default target, build the module(s)'
1267 @echo ' modules_install - install the module'
1268 @echo ' clean - remove generated files in module directory only'
1272 PHONY += prepare scripts
1275 endif # KBUILD_EXTMOD
1277 clean: $(clean-dirs)
1280 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1281 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1283 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1284 -o -name '*.symtypes' -o -name 'modules.order' \
1285 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1286 -o -name '*.gcno' \) -type f -print | xargs rm -f
1288 # Generate tags for editors
1289 # ---------------------------------------------------------------------------
1290 quiet_cmd_tags = GEN $@
1291 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1293 tags TAGS cscope gtags: FORCE
1296 # Scripts to check various things for consistency
1297 # ---------------------------------------------------------------------------
1299 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1302 find $(srctree)/* $(RCS_FIND_IGNORE) \
1303 -name '*.[hcS]' -type f -print | sort \
1304 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1307 find $(srctree)/* $(RCS_FIND_IGNORE) \
1308 -name '*.[hcS]' -type f -print | sort \
1309 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1312 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1315 $(PERL) $(srctree)/scripts/namespace.pl
1318 $(PERL) $(srctree)/scripts/export_report.pl
1320 endif #ifeq ($(config-targets),1)
1321 endif #ifeq ($(mixed-targets),1)
1323 PHONY += checkstack kernelrelease kernelversion image_name
1325 # UML needs a little special treatment here. It wants to use the host
1326 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1327 # else wants $(ARCH), including people doing cross-builds, which means
1328 # that $(SUBARCH) doesn't work here.
1330 CHECKSTACK_ARCH := $(SUBARCH)
1332 CHECKSTACK_ARCH := $(ARCH)
1335 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1336 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1339 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1342 @echo $(KERNELVERSION)
1345 @echo $(KBUILD_IMAGE)
1347 # Clear a bunch of variables before executing the submake
1349 $(Q)mkdir -p $(objtree)/tools
1350 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1353 $(Q)mkdir -p $(objtree)/tools
1354 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1357 # ---------------------------------------------------------------------------
1358 # Single targets are compatible with:
1359 # - build with mixed source and output
1360 # - build with separate output dir 'make O=...'
1361 # - external modules
1363 # target-dir => where to store outputfile
1364 # build-dir => directory in kernel source tree to use
1366 ifeq ($(KBUILD_EXTMOD),)
1367 build-dir = $(patsubst %/,%,$(dir $@))
1368 target-dir = $(dir $@)
1370 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1371 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1372 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1375 %.s: %.c prepare scripts FORCE
1376 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1377 %.i: %.c prepare scripts FORCE
1378 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1379 %.o: %.c prepare scripts FORCE
1380 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1381 %.lst: %.c prepare scripts FORCE
1382 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1383 %.s: %.S prepare scripts FORCE
1384 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1385 %.o: %.S prepare scripts FORCE
1386 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1387 %.symtypes: %.c prepare scripts FORCE
1388 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1391 /: prepare scripts FORCE
1393 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1394 $(build)=$(build-dir)
1395 %/: prepare scripts FORCE
1397 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1398 $(build)=$(build-dir)
1399 %.ko: prepare scripts FORCE
1401 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1402 $(build)=$(build-dir) $(@:.ko=.o)
1403 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1405 # FIXME Should go into a make.lib or something
1406 # ===========================================================================
1408 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1409 cmd_rmdirs = rm -rf $(rm-dirs)
1411 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1412 cmd_rmfiles = rm -f $(rm-files)
1414 # Run depmod only if we have System.map and depmod is executable
1415 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1416 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1417 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1419 # Create temporary dir for module support files
1420 # clean it up only when building all modules
1421 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1422 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1424 # read all saved command lines
1426 targets := $(wildcard $(sort $(targets)))
1427 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1429 ifneq ($(cmd_files),)
1430 $(cmd_files): ; # Do not try to update included dependency files
1431 include $(cmd_files)
1434 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1436 # $(Q)$(MAKE) $(clean)=dir
1437 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1439 endif # skip-makefile
1444 # Declare the contents of the .PHONY variable as phony. We keep that
1445 # information in a variable so we can use it in if_changed and friends.