5 NAME = TOSSUG Baby Fish
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.
16 # o use make's built-in rules and variables
17 # (this increases performance and avoids hard-to-debug behaviour);
18 # o print "Entering directory ...";
19 MAKEFLAGS += -rR --no-print-directory
21 # Avoid funny character set dependencies
25 export LC_COLLATE LC_NUMERIC
27 # We are using a recursive build, so we need to do a little thinking
28 # to get the ordering right.
30 # Most importantly: sub-Makefiles should only ever modify files in
31 # their own directory. If in some directory we have a dependency on
32 # a file in another dir (which doesn't happen often, but it's often
33 # unavoidable when linking the built-in.o targets which finally
34 # turn into vmlinux), we will call a sub make in that other dir, and
35 # after that we are sure that everything which is in that other dir
38 # The only cases where we need to modify files which have global
39 # effects are thus separated out and done before the recursive
40 # descending is started. They are now explicitly listed as the
43 # To put more focus on warnings, be less verbose as default
44 # Use 'make V=1' to see the full commands
46 ifeq ("$(origin V)", "command line")
53 # Call a source code checker (by default, "sparse") as part of the
56 # Use 'make C=1' to enable checking of only re-compiled files.
57 # Use 'make C=2' to enable checking of *all* source files, regardless
58 # of whether they are re-compiled or not.
60 # See the file "Documentation/sparse.txt" for more details, including
61 # where to get the "sparse" utility.
63 ifeq ("$(origin C)", "command line")
64 KBUILD_CHECKSRC = $(C)
66 ifndef KBUILD_CHECKSRC
70 # Use make M=dir to specify directory of external module to build
71 # Old syntax make ... SUBDIRS=$PWD is still supported
72 # Setting the environment variable KBUILD_EXTMOD take precedence
74 KBUILD_EXTMOD ?= $(SUBDIRS)
77 ifeq ("$(origin M)", "command line")
81 # kbuild supports saving output files in a separate directory.
82 # To locate output files in a separate directory two syntaxes are supported.
83 # In both cases the working directory must be the root of the kernel src.
85 # Use "make O=dir/to/store/output/files/"
87 # 2) Set KBUILD_OUTPUT
88 # Set the environment variable KBUILD_OUTPUT to point to the directory
89 # where the output files shall be placed.
90 # export KBUILD_OUTPUT=dir/to/store/output/files/
93 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
97 # KBUILD_SRC is set on invocation of make in OBJ directory
98 # KBUILD_SRC is not intended to be used by the regular user (for now)
101 # OK, Make called in directory where kernel src resides
102 # Do we want to locate output files in a separate directory?
103 ifeq ("$(origin O)", "command line")
104 KBUILD_OUTPUT := $(O)
107 ifeq ("$(origin W)", "command line")
108 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
111 # That's our default target when none is given on the command line
115 # Cancel implicit rules on top Makefile
116 $(CURDIR)/Makefile Makefile: ;
118 ifneq ($(KBUILD_OUTPUT),)
119 # Invoke a second make in the output directory, passing relevant variables
120 # check that the output directory actually exists
121 saved-output := $(KBUILD_OUTPUT)
122 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
123 $(if $(KBUILD_OUTPUT),, \
124 $(error output directory "$(saved-output)" does not exist))
126 PHONY += $(MAKECMDGOALS) sub-make
128 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
132 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
133 KBUILD_SRC=$(CURDIR) \
134 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
135 $(filter-out _all sub-make,$(MAKECMDGOALS))
137 # Leave processing to above invocation of make
139 endif # ifneq ($(KBUILD_OUTPUT),)
140 endif # ifeq ($(KBUILD_SRC),)
142 # We process the rest of the Makefile if this is the final invocation of make
143 ifeq ($(skip-makefile),)
145 # If building an external module we do not care about the all: rule
146 # but instead _all depend on modules
148 ifeq ($(KBUILD_EXTMOD),)
154 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
159 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
161 export srctree objtree VPATH
164 # SUBARCH tells the usermode build what the underlying arch is. That is set
165 # first, and if a usermode build is happening, the "ARCH=um" on the command
166 # line overrides the setting of ARCH below. If a native build is happening,
167 # then ARCH is assigned, getting whatever value it gets normally, and
168 # SUBARCH is subsequently ignored.
170 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
171 -e s/sun4u/sparc64/ \
172 -e s/arm.*/arm/ -e s/sa110/arm/ \
173 -e s/s390x/s390/ -e s/parisc64/parisc/ \
174 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
175 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
177 # Cross compiling and selecting different set of gcc/bin-utils
178 # ---------------------------------------------------------------------------
180 # When performing cross compilation for other architectures ARCH shall be set
181 # to the target architecture. (See arch/* for the possibilities).
182 # ARCH can be set during invocation of make:
184 # Another way is to have ARCH set in the environment.
185 # The default ARCH is the host where make is executed.
187 # CROSS_COMPILE specify the prefix used for all executables used
188 # during compilation. Only gcc and related bin-utils executables
189 # are prefixed with $(CROSS_COMPILE).
190 # CROSS_COMPILE can be set on the command line
191 # make CROSS_COMPILE=ia64-linux-
192 # Alternatively CROSS_COMPILE can be set in the environment.
193 # A third alternative is to store a setting in .config so that plain
194 # "make" in the configured kernel build directory always uses that.
195 # Default value for CROSS_COMPILE is not to prefix executables
196 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
199 ifneq ($(wildcard ../prebuilts/gcc/linux-x86/arm/arm-eabi-4.6),)
200 CROSS_COMPILE ?= ../prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi-
202 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
204 # Architecture as present in compile.h
205 UTS_MACHINE := $(ARCH)
208 # Additional ARCH settings for x86
212 ifeq ($(ARCH),x86_64)
216 # Additional ARCH settings for sparc
217 ifeq ($(ARCH),sparc32)
220 ifeq ($(ARCH),sparc64)
224 # Additional ARCH settings for sh
229 # Additional ARCH settings for tile
230 ifeq ($(ARCH),tilepro)
233 ifeq ($(ARCH),tilegx)
237 # Where to locate arch specific headers
238 hdr-arch := $(SRCARCH)
240 KCONFIG_CONFIG ?= .config
241 export KCONFIG_CONFIG
243 # SHELL used by kbuild
244 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
245 else if [ -x /bin/bash ]; then echo /bin/bash; \
246 else echo sh; fi ; fi)
250 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
253 # Decide whether to build built-in, modular, or both.
254 # Normally, just do built-in.
259 # If we have only "make modules", don't compile built-in objects.
260 # When we're building modules with modversions, we need to consider
261 # the built-in objects during the descend as well, in order to
262 # make sure the checksums are up to date before we record them.
264 ifeq ($(MAKECMDGOALS),modules)
265 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
268 # If we have "make <whatever> modules", compile modules
269 # in addition to whatever we do anyway.
270 # Just "make" or "make all" shall build modules as well
272 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
276 ifeq ($(MAKECMDGOALS),)
280 export KBUILD_MODULES KBUILD_BUILTIN
281 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
284 # ---------------------------------------------------------------------------
286 # Normally, we echo the whole command before executing it. By making
287 # that echo $($(quiet)$(cmd)), we now have the possibility to set
288 # $(quiet) to choose other forms of output instead, e.g.
290 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
291 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
293 # If $(quiet) is empty, the whole command will be printed.
294 # If it is set to "quiet_", only the short version will be printed.
295 # If it is set to "silent_", nothing will be printed at all, since
296 # the variable $(silent_cmd_cc_o_c) doesn't exist.
298 # A simple variant is to prefix commands with $(Q) - that's useful
299 # for commands that shall be hidden in non-verbose mode.
303 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
304 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
306 ifeq ($(KBUILD_VERBOSE),1)
314 # If the user is running make -s (silent mode), suppress echoing of
317 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
321 export quiet Q KBUILD_VERBOSE
324 # Look for make include files relative to root of kernel src
325 MAKEFLAGS += --include-dir=$(srctree)
327 # We need some generic definitions (do not try to remake the file).
328 $(srctree)/scripts/Kbuild.include: ;
329 include $(srctree)/scripts/Kbuild.include
331 # Make variables (CC, etc...)
333 AS = $(CROSS_COMPILE)as
334 LD = $(CROSS_COMPILE)ld
335 CC = $(CROSS_COMPILE)gcc
337 AR = $(CROSS_COMPILE)ar
338 NM = $(CROSS_COMPILE)nm
339 STRIP = $(CROSS_COMPILE)strip
340 OBJCOPY = $(CROSS_COMPILE)objcopy
341 OBJDUMP = $(CROSS_COMPILE)objdump
343 GENKSYMS = scripts/genksyms/genksyms
344 INSTALLKERNEL := installkernel
345 DEPMOD = /sbin/depmod
349 # Use the wrapper for the compiler. This wrapper scans for new
350 # warnings and causes the build to stop upon encountering them.
351 ifneq ($(wildcard $(srctree)/scripts/gcc-wrapper.py),)
352 CC = $(srctree)/scripts/gcc-wrapper.py $(CROSS_COMPILE)gcc
355 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
356 -Wbitwise -Wno-return-void $(CF)
362 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
365 # Use USERINCLUDE when you must reference the UAPI directories only.
367 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
368 -Iarch/$(hdr-arch)/include/generated/uapi \
369 -I$(srctree)/include/uapi \
370 -Iinclude/generated/uapi \
371 -include $(srctree)/include/linux/kconfig.h
373 # Use LINUXINCLUDE when you must reference the include/ directory.
374 # Needed to be compatible with the O= option
376 -I$(srctree)/arch/$(hdr-arch)/include \
377 -Iarch/$(hdr-arch)/include/generated \
378 $(if $(KBUILD_SRC), -I$(srctree)/include) \
382 KBUILD_CPPFLAGS := -D__KERNEL__
384 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
385 -fno-strict-aliasing -fno-common \
386 -Werror-implicit-function-declaration \
387 -Wno-format-security \
388 -fno-delete-null-pointer-checks
389 KBUILD_AFLAGS_KERNEL :=
390 KBUILD_CFLAGS_KERNEL :=
391 KBUILD_AFLAGS := -D__ASSEMBLY__
392 KBUILD_AFLAGS_MODULE := -DMODULE
393 KBUILD_CFLAGS_MODULE := -DMODULE
394 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
396 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
397 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
398 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
400 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
401 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
402 export CPP AR NM STRIP OBJCOPY OBJDUMP
403 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
404 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
406 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
407 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
408 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
409 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
410 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
411 export KBUILD_ARFLAGS OBJCOPY_OUTPUT_FORMAT
413 # When compiling out-of-tree modules, put MODVERDIR in the module
414 # tree rather than in the kernel tree. The kernel tree might
416 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
418 # Files to ignore in find ... statements
420 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
421 -o -name .pc -o -name .hg -o -name .git \) -prune -o
422 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
423 --exclude CVS --exclude .pc --exclude .hg --exclude .git
425 # ===========================================================================
426 # Rules shared between *config targets and build targets
428 # Basic helpers built in scripts/
429 PHONY += scripts_basic
431 $(Q)$(MAKE) $(build)=scripts/basic
432 $(Q)rm -f .tmp_quiet_recordmcount
434 # To avoid any implicit rule to kick in, define an empty command.
435 scripts/basic/%: scripts_basic ;
437 PHONY += outputmakefile
438 # outputmakefile generates a Makefile in the output directory, if using a
439 # separate output directory. This allows convenient use of make in the
442 ifneq ($(KBUILD_SRC),)
443 $(Q)ln -fsn $(srctree) source
444 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
445 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
448 # Support for using generic headers in asm-generic
451 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
452 src=asm obj=arch/$(SRCARCH)/include/generated/asm
453 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
454 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
456 # To make sure we do not include .config for any of the *config targets
457 # catch them early, and hand them over to scripts/kconfig/Makefile
458 # It is allowed to specify more targets when calling make, including
459 # mixing *config targets and build targets.
460 # For example 'make oldconfig all'.
461 # Detect when mixed targets is specified, and make a second invocation
462 # of make so .config is not included in this case either (for *config).
464 version_h := include/generated/uapi/linux/version.h
466 no-dot-config-targets := clean mrproper distclean \
467 cscope gtags TAGS tags help %docs check% coccicheck \
468 $(version_h) headers_% archheaders archscripts \
469 kernelversion %src-pkg
475 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
476 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
481 ifeq ($(KBUILD_EXTMOD),)
482 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
484 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
490 ifeq ($(mixed-targets),1)
491 # ===========================================================================
492 # We're called with mixed targets (*config and build targets).
493 # Handle them one by one.
496 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
499 ifeq ($(config-targets),1)
500 # ===========================================================================
501 # *config targets only - make sure prerequisites are updated, and descend
502 # in scripts/kconfig to make the *config target
504 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
505 # KBUILD_DEFCONFIG may point out an alternative default configuration
506 # used for 'make defconfig'
507 include $(srctree)/arch/$(SRCARCH)/Makefile
508 export KBUILD_DEFCONFIG KBUILD_KCONFIG
510 config: scripts_basic outputmakefile FORCE
511 $(Q)mkdir -p include/linux include/config
512 $(Q)$(MAKE) $(build)=scripts/kconfig $@
514 %config: scripts_basic outputmakefile FORCE
515 $(Q)mkdir -p include/linux include/config
516 $(Q)$(MAKE) $(build)=scripts/kconfig $@
519 # ===========================================================================
520 # Build targets only - this includes vmlinux, arch specific targets, clean
521 # targets and others. In general all targets except *config targets.
523 ifeq ($(KBUILD_EXTMOD),)
524 # Additional helpers built in scripts/
525 # Carefully list dependencies so we do not try to build scripts twice
528 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
530 $(Q)$(MAKE) $(build)=$(@)
532 # Objects we will link into vmlinux / subdirs we need to visit
534 drivers-y := drivers/ sound/ firmware/
538 endif # KBUILD_EXTMOD
540 ifeq ($(dot-config),1)
542 -include include/config/auto.conf
544 ifeq ($(KBUILD_EXTMOD),)
545 # Read in dependencies to all Kconfig* files, make sure to run
546 # oldconfig if changes are detected.
547 -include include/config/auto.conf.cmd
549 # To avoid any implicit rule to kick in, define an empty command
550 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
552 # If .config is newer than include/config/auto.conf, someone tinkered
553 # with it and forgot to run make oldconfig.
554 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
555 # we execute the config step to be sure to catch updated Kconfig files
556 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
557 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
559 # external modules needs include/generated/autoconf.h and include/config/auto.conf
560 # but do not care if they are up-to-date. Use auto.conf to trigger the test
561 PHONY += include/config/auto.conf
563 include/config/auto.conf:
564 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
566 echo >&2 " ERROR: Kernel configuration is invalid."; \
567 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
568 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
572 endif # KBUILD_EXTMOD
575 # Dummy target needed, because used as prerequisite
576 include/config/auto.conf: ;
577 endif # $(dot-config)
579 # The all: target is the default when no target is given on the
581 # This allow a user to issue only 'make' to build a kernel including modules
582 # Defaults to vmlinux, but the arch makefile usually adds further targets
585 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
586 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
591 include $(srctree)/arch/$(SRCARCH)/Makefile
593 ifdef CONFIG_READABLE_ASM
594 # Disable optimizations that make assembler listings hard to read.
595 # reorder blocks reorders the control in the function
596 # ipa clone creates specialized cloned functions
597 # partial inlining inlines only parts of functions
598 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
599 $(call cc-option,-fno-ipa-cp-clone,) \
600 $(call cc-option,-fno-partial-inlining)
603 ifneq ($(CONFIG_FRAME_WARN),0)
604 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
607 # Force gcc to behave correct even for buggy distributions
608 ifndef CONFIG_CC_STACKPROTECTOR
609 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
612 # This warning generated too much noise in a regular build.
613 # Use make W=1 to enable this warning (see scripts/Makefile.build)
614 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
616 ifdef CONFIG_FRAME_POINTER
617 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
619 # Some targets (ARM with Thumb2, for example), can't be built with frame
620 # pointers. For those, we don't have FUNCTION_TRACER automatically
621 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
622 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
623 # -fomit-frame-pointer with FUNCTION_TRACER.
624 ifndef CONFIG_FUNCTION_TRACER
625 KBUILD_CFLAGS += -fomit-frame-pointer
629 ifdef CONFIG_DEBUG_INFO
631 KBUILD_AFLAGS += -gdwarf-2
634 ifdef CONFIG_DEBUG_INFO_REDUCED
635 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
636 $(call cc-option,-fno-var-tracking)
639 ifdef CONFIG_FUNCTION_TRACER
640 ifdef CONFIG_HAVE_FENTRY
641 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
643 KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
644 KBUILD_AFLAGS += $(CC_USING_FENTRY)
645 ifdef CONFIG_DYNAMIC_FTRACE
646 ifdef CONFIG_HAVE_C_RECORDMCOUNT
647 BUILD_C_RECORDMCOUNT := y
648 export BUILD_C_RECORDMCOUNT
653 # We trigger additional mismatches with less inlining
654 ifdef CONFIG_DEBUG_SECTION_MISMATCH
655 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
658 # arch Makefile may override CC so keep this after arch Makefile is included
659 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
660 CHECKFLAGS += $(NOSTDINC_FLAGS)
662 # warn about C99 declaration after statement
663 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
665 # disable pointer signed / unsigned warnings in gcc 4.0
666 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
668 # disable invalid "can't wrap" optimizations for signed / pointers
669 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
671 # conserve stack if available
672 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
674 # use the deterministic mode of AR if available
675 KBUILD_ARFLAGS := $(call ar-option,D)
677 # check for 'asm goto'
678 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
679 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
682 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
683 KBUILD_CPPFLAGS += $(KCPPFLAGS)
684 KBUILD_AFLAGS += $(KAFLAGS)
685 KBUILD_CFLAGS += $(KCFLAGS)
687 # Use --build-id when available.
688 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
689 $(call cc-ldoption, -Wl$(comma)--build-id,))
690 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
691 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
693 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
694 LDFLAGS_vmlinux += $(call ld-option, -X,)
697 ifeq ($(CONFIG_PIE),y)
698 LDFLAGS_vmlinux += --just-symbols=pie/pie.syms
701 # Default kernel image to build when no specific target is given.
702 # KBUILD_IMAGE may be overruled on the command line or
703 # set in the environment
704 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
706 export KBUILD_IMAGE ?= vmlinux
709 # INSTALL_PATH specifies where to place the updated kernel and system map
710 # images. Default is /boot, but you can set it to other values
711 export INSTALL_PATH ?= /boot
714 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
715 # relocations required by build roots. This is not defined in the
716 # makefile but the argument can be passed to make if needed.
719 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
723 # INSTALL_MOD_STRIP, if defined, will cause modules to be
724 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
725 # the default option --strip-debug will be used. Otherwise,
726 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
728 ifdef INSTALL_MOD_STRIP
729 ifeq ($(INSTALL_MOD_STRIP),1)
730 mod_strip_cmd = $(STRIP) --strip-debug
732 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
733 endif # INSTALL_MOD_STRIP=1
736 endif # INSTALL_MOD_STRIP
740 ifdef CONFIG_MODULE_SIG_ALL
741 MODSECKEY = ./signing_key.priv
742 MODPUBKEY = ./signing_key.x509
744 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
751 ifeq ($(KBUILD_EXTMOD),)
752 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
754 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
755 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
756 $(net-y) $(net-m) $(libs-y) $(libs-m) $(libpie-y)))
758 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
760 $(core-n) $(core-) $(drivers-n) $(drivers-) \
761 $(net-n) $(net-) $(libs-n) $(libs-) $(libpie-))))
763 pie-$(CONFIG_PIE) := pie/
765 init-y := $(patsubst %/, %/built-in.o, $(init-y))
766 core-y := $(patsubst %/, %/built-in.o, $(core-y))
767 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
768 net-y := $(patsubst %/, %/built-in.o, $(net-y))
769 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
770 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
771 libs-y := $(libs-y1) $(libs-y2)
772 pie-y := $(patsubst %/, %/built-in.o, $(pie-y))
773 libpie-y := $(patsubst %/, %/built-in.o, $(libpie-y))
775 # Externally visible symbols (used by link-vmlinux.sh)
776 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
777 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
778 export KBUILD_VMLINUX_PIE := $(pie-y)
779 export KBUILD_LIBPIE := $(libpie-y)
780 export KBUILD_PIE_LDS := $(PIE_LDS)
781 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
782 export LDFLAGS_vmlinux
783 # used by scripts/pacmage/Makefile
784 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
786 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_PIE_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_PIE) $(KBUILD_LIBPIE)
788 # Final link of vmlinux
789 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
790 quiet_cmd_link-vmlinux = LINK $@
792 # Include targets which we want to
793 # execute if the rest of the kernel build went well.
794 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
795 ifdef CONFIG_HEADERS_CHECK
796 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
799 $(Q)$(MAKE) $(build)=samples
801 ifdef CONFIG_BUILD_DOCSRC
802 $(Q)$(MAKE) $(build)=Documentation
804 +$(call if_changed,link-vmlinux)
806 # The actual objects are generated when descending,
807 # make sure no implicit rule kicks in
808 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
810 # Handle descending into subdirectories listed in $(vmlinux-dirs)
811 # Preset locale variables to speed up the build process. Limit locale
812 # tweaks to this spot to avoid wrong language settings when running
813 # make menuconfig etc.
814 # Error messages still appears in the original language
816 PHONY += $(vmlinux-dirs)
817 $(vmlinux-dirs): prepare scripts
818 $(Q)$(MAKE) $(build)=$@
820 # Store (new) KERNELRELASE string in include/config/kernel.release
821 include/config/kernel.release: include/config/auto.conf FORCE
823 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
826 # Things we need to do before we recursively start building the kernel
827 # or the modules are listed in "prepare".
828 # A multi level approach is used. prepareN is processed before prepareN-1.
829 # archprepare is used in arch Makefiles and when processed asm symlink,
830 # version.h and scripts_basic is processed / created.
832 # Listed in dependency order
833 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
835 # prepare3 is used to check if we are building in a separate output directory,
837 # 1) Check that make has not been executed in the kernel src $(srctree)
838 prepare3: include/config/kernel.release
839 ifneq ($(KBUILD_SRC),)
840 @$(kecho) ' Using $(srctree) as source for kernel'
841 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
842 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
843 echo >&2 " in the '$(srctree)' directory.";\
848 # prepare2 creates a makefile if using a separate output directory
849 prepare2: prepare3 outputmakefile asm-generic
851 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
852 include/config/auto.conf
855 archprepare: archheaders archscripts prepare1 scripts_basic
857 prepare0: archprepare FORCE
858 $(Q)$(MAKE) $(build)=.
860 # All the preparing..
863 # Generate some files
864 # ---------------------------------------------------------------------------
866 # KERNELRELEASE can change from a few different places, meaning version.h
867 # needs to be updated, so this check is forced on all builds
870 define filechk_utsrelease.h
871 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
872 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
875 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
878 define filechk_version.h
879 (echo \#define LINUX_VERSION_CODE $(shell \
880 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
881 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
884 $(version_h): $(srctree)/Makefile FORCE
885 $(call filechk,version.h)
887 include/generated/utsrelease.h: include/config/kernel.release FORCE
888 $(call filechk,utsrelease.h)
892 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
893 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
895 # ---------------------------------------------------------------------------
899 @echo '*** Warning: make $@ is unnecessary now.'
901 # ---------------------------------------------------------------------------
903 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
904 export INSTALL_FW_PATH
906 PHONY += firmware_install
907 firmware_install: FORCE
908 @mkdir -p $(objtree)/firmware
909 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
911 # ---------------------------------------------------------------------------
914 #Default location for installed headers
915 export INSTALL_HDR_PATH = $(objtree)/usr
917 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
919 # If we do an all arch process set dst to asm-$(hdr-arch)
920 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
929 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
930 $(Q)$(MAKE) $(build)=scripts build_unifdef
932 PHONY += headers_install_all
934 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
936 PHONY += headers_install
937 headers_install: __headers
938 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
939 $(error Headers not exportable for the $(SRCARCH) architecture))
940 $(Q)$(MAKE) $(hdr-inst)=include/uapi
941 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
943 PHONY += headers_check_all
944 headers_check_all: headers_install_all
945 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
947 PHONY += headers_check
948 headers_check: headers_install
949 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
950 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
952 # ---------------------------------------------------------------------------
957 # By default, build modules as well
963 # A module can be listed more than once in obj-m resulting in
964 # duplicate lines in modules.order files. Those are removed
965 # using awk while concatenating to the final file.
968 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
969 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
970 @$(kecho) ' Building modules, stage 2.';
971 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
972 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
974 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
975 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
977 %/modules.builtin: include/config/auto.conf
978 $(Q)$(MAKE) $(modbuiltin)=$*
981 # Target to prepare building external modules
982 PHONY += modules_prepare
983 modules_prepare: prepare scripts
985 # Target to install modules
986 PHONY += modules_install
987 modules_install: _modinst_ _modinst_post
991 @rm -rf $(MODLIB)/kernel
992 @rm -f $(MODLIB)/source
993 @mkdir -p $(MODLIB)/kernel
994 @ln -s $(srctree) $(MODLIB)/source
995 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
996 rm -f $(MODLIB)/build ; \
997 ln -s $(objtree) $(MODLIB)/build ; \
999 @cp -f $(objtree)/modules.order $(MODLIB)/
1000 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1001 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1003 # This depmod is only for convenience to give the initial
1004 # boot a modules.dep even before / is mounted read-write. However the
1005 # boot script depmod is the master version.
1006 PHONY += _modinst_post
1007 _modinst_post: _modinst_
1008 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1011 ifeq ($(CONFIG_MODULE_SIG), y)
1012 PHONY += modules_sign
1014 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1017 else # CONFIG_MODULES
1019 # Modules not configured
1020 # ---------------------------------------------------------------------------
1022 modules modules_install: FORCE
1024 @echo >&2 "The present kernel configuration has modules disabled."
1025 @echo >&2 "Type 'make config' and enable loadable module support."
1026 @echo >&2 "Then build a kernel with module support enabled."
1030 endif # CONFIG_MODULES
1033 # Cleaning is done on three levels.
1034 # make clean Delete most generated files
1035 # Leave enough to build external modules
1036 # make mrproper Delete the current configuration, and all generated files
1037 # make distclean Remove editor backup files, patch leftover files and the like
1039 # Directories & files removed with 'make clean'
1040 CLEAN_DIRS += $(MODVERDIR)
1042 # Directories & files removed with 'make mrproper'
1043 MRPROPER_DIRS += include/config usr/include include/generated \
1044 arch/*/include/generated
1045 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1046 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1047 signing_key.priv signing_key.x509 x509.genkey \
1048 extra_certificates signing_key.x509.keyid \
1049 signing_key.x509.signer
1051 # clean - Delete most, but leave enough to build external modules
1053 clean: rm-dirs := $(CLEAN_DIRS)
1054 clean: rm-files := $(CLEAN_FILES)
1055 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples pie)
1057 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1059 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1062 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1064 clean: archclean vmlinuxclean
1066 # mrproper - Delete all generated files, including .config
1068 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1069 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1070 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1072 PHONY += $(mrproper-dirs) mrproper archmrproper
1074 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1076 mrproper: clean archmrproper $(mrproper-dirs)
1085 @find $(srctree) $(RCS_FIND_IGNORE) \
1086 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1087 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1089 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1090 -type f -print | xargs rm -f
1093 # Packaging of the kernel to various formats
1094 # ---------------------------------------------------------------------------
1095 # rpm target kept for backward compatibility
1096 package-dir := $(srctree)/scripts/package
1099 $(Q)$(MAKE) $(build)=$(package-dir) $@
1100 %pkg: include/config/kernel.release FORCE
1101 $(Q)$(MAKE) $(build)=$(package-dir) $@
1102 rpm: include/config/kernel.release FORCE
1103 $(Q)$(MAKE) $(build)=$(package-dir) $@
1106 # Brief documentation of the typical targets used
1107 # ---------------------------------------------------------------------------
1109 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1110 boards := $(notdir $(boards))
1111 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1112 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1115 @echo 'Cleaning targets:'
1116 @echo ' clean - Remove most generated files but keep the config and'
1117 @echo ' enough build support to build external modules'
1118 @echo ' mrproper - Remove all generated files + config + various backup files'
1119 @echo ' distclean - mrproper + remove editor backup and patch files'
1121 @echo 'Configuration targets:'
1122 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1124 @echo 'Other generic targets:'
1125 @echo ' all - Build all targets marked with [*]'
1126 @echo '* vmlinux - Build the bare kernel'
1127 @echo '* modules - Build all modules'
1128 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1129 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1130 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1131 @echo ' dir/ - Build all files in dir and below'
1132 @echo ' dir/file.[oisS] - Build specified target only'
1133 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1134 @echo ' (requires a recent binutils and recent build (System.map))'
1135 @echo ' dir/file.ko - Build module including final link'
1136 @echo ' modules_prepare - Set up for building external modules'
1137 @echo ' tags/TAGS - Generate tags file for editors'
1138 @echo ' cscope - Generate cscope index'
1139 @echo ' gtags - Generate GNU GLOBAL index'
1140 @echo ' kernelrelease - Output the release version string'
1141 @echo ' kernelversion - Output the version stored in Makefile'
1142 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1143 echo ' (default: $(INSTALL_HDR_PATH))'; \
1145 @echo 'Static analysers'
1146 @echo ' checkstack - Generate a list of stack hogs'
1147 @echo ' namespacecheck - Name space analysis on compiled kernel'
1148 @echo ' versioncheck - Sanity check on version.h usage'
1149 @echo ' includecheck - Check for duplicate included header files'
1150 @echo ' export_report - List the usages of all exported symbols'
1151 @echo ' headers_check - Sanity check on exported headers'
1152 @echo ' headerdep - Detect inclusion cycles in headers'
1153 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1155 @echo 'Kernel packaging:'
1156 @$(MAKE) $(build)=$(package-dir) help
1158 @echo 'Documentation targets:'
1159 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1161 @echo 'Architecture specific targets ($(SRCARCH)):'
1162 @$(if $(archhelp),$(archhelp),\
1163 echo ' No architecture specific help defined for $(SRCARCH)')
1166 $(foreach b, $(boards), \
1167 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1169 @$(if $(board-dirs), \
1170 $(foreach b, $(board-dirs), \
1171 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1172 printf " %-16s - Show all of the above\\n" help-boards; \
1175 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1176 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1177 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1178 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1179 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1180 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1181 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1182 @echo ' 1: warnings which may be relevant and do not occur too often'
1183 @echo ' 2: warnings which occur quite often but may still be relevant'
1184 @echo ' 3: more obscure warnings, can most likely be ignored'
1185 @echo ' Multiple levels can be combined with W=12 or W=123'
1187 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1188 @echo 'For further info see the ./README file'
1191 help-board-dirs := $(addprefix help-,$(board-dirs))
1193 help-boards: $(help-board-dirs)
1195 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1197 $(help-board-dirs): help-%:
1198 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1199 @$(if $(boards-per-dir), \
1200 $(foreach b, $(boards-per-dir), \
1201 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1205 # Documentation targets
1206 # ---------------------------------------------------------------------------
1207 %docs: scripts_basic FORCE
1208 $(Q)$(MAKE) $(build)=scripts build_docproc
1209 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1211 else # KBUILD_EXTMOD
1214 # External module support.
1215 # When building external modules the kernel used as basis is considered
1216 # read-only, and no consistency checks are made and the make
1217 # system is not used on the basis kernel. If updates are required
1218 # in the basis kernel ordinary make commands (without M=...) must
1221 # The following are the only valid targets when building external
1223 # make M=dir clean Delete all automatically generated files
1224 # make M=dir modules Make all modules in specified dir
1225 # make M=dir Same as 'make M=dir modules'
1226 # make M=dir modules_install
1227 # Install the modules built in the module directory
1228 # Assumes install directory is already created
1230 # We are always building modules
1232 PHONY += crmodverdir
1236 PHONY += $(objtree)/Module.symvers
1237 $(objtree)/Module.symvers:
1238 @test -e $(objtree)/Module.symvers || ( \
1240 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1241 echo " is missing; modules will have no dependencies and modversions."; \
1244 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1245 PHONY += $(module-dirs) modules
1246 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1247 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1249 modules: $(module-dirs)
1250 @$(kecho) ' Building modules, stage 2.';
1251 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1253 PHONY += modules_install
1254 modules_install: _emodinst_ _emodinst_post
1256 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1259 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1260 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1262 PHONY += _emodinst_post
1263 _emodinst_post: _emodinst_
1266 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1268 PHONY += $(clean-dirs) clean
1270 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1272 clean: rm-dirs := $(MODVERDIR)
1273 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1276 @echo ' Building external modules.'
1277 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1279 @echo ' modules - default target, build the module(s)'
1280 @echo ' modules_install - install the module'
1281 @echo ' clean - remove generated files in module directory only'
1285 PHONY += prepare scripts
1288 endif # KBUILD_EXTMOD
1290 clean: $(clean-dirs)
1293 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1294 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1296 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1297 -o -name '*.symtypes' -o -name 'modules.order' \
1298 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1299 -o -name '*.gcno' \) -type f -print | xargs rm -f
1301 # Generate tags for editors
1302 # ---------------------------------------------------------------------------
1303 quiet_cmd_tags = GEN $@
1304 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1306 tags TAGS cscope gtags: FORCE
1309 # Scripts to check various things for consistency
1310 # ---------------------------------------------------------------------------
1312 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1315 find $(srctree)/* $(RCS_FIND_IGNORE) \
1316 -name '*.[hcS]' -type f -print | sort \
1317 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1320 find $(srctree)/* $(RCS_FIND_IGNORE) \
1321 -name '*.[hcS]' -type f -print | sort \
1322 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1325 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1328 $(PERL) $(srctree)/scripts/namespace.pl
1331 $(PERL) $(srctree)/scripts/export_report.pl
1333 endif #ifeq ($(config-targets),1)
1334 endif #ifeq ($(mixed-targets),1)
1336 PHONY += checkstack kernelrelease kernelversion
1338 # UML needs a little special treatment here. It wants to use the host
1339 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1340 # else wants $(ARCH), including people doing cross-builds, which means
1341 # that $(SUBARCH) doesn't work here.
1343 CHECKSTACK_ARCH := $(SUBARCH)
1345 CHECKSTACK_ARCH := $(ARCH)
1348 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1349 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1352 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1355 @echo $(KERNELVERSION)
1357 # Clear a bunch of variables before executing the submake
1359 $(Q)mkdir -p $(objtree)/tools
1360 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1363 $(Q)mkdir -p $(objtree)/tools
1364 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1367 # ---------------------------------------------------------------------------
1368 # Single targets are compatible with:
1369 # - build with mixed source and output
1370 # - build with separate output dir 'make O=...'
1371 # - external modules
1373 # target-dir => where to store outputfile
1374 # build-dir => directory in kernel source tree to use
1376 ifeq ($(KBUILD_EXTMOD),)
1377 build-dir = $(patsubst %/,%,$(dir $@))
1378 target-dir = $(dir $@)
1380 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1381 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1382 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1385 %.s: %.c prepare scripts FORCE
1386 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1387 %.i: %.c prepare scripts FORCE
1388 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1389 %.o: %.c prepare scripts FORCE
1390 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1391 %.lst: %.c prepare scripts FORCE
1392 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1393 %.s: %.S prepare scripts FORCE
1394 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1395 %.o: %.S prepare scripts FORCE
1396 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1397 %.symtypes: %.c prepare scripts FORCE
1398 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1401 /: prepare scripts FORCE
1403 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1404 $(build)=$(build-dir)
1405 %/: prepare scripts FORCE
1407 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1408 $(build)=$(build-dir)
1409 %.ko: prepare scripts FORCE
1411 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1412 $(build)=$(build-dir) $(@:.ko=.o)
1413 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1415 # FIXME Should go into a make.lib or something
1416 # ===========================================================================
1418 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1419 cmd_rmdirs = rm -rf $(rm-dirs)
1421 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1422 cmd_rmfiles = rm -f $(rm-files)
1424 # Run depmod only if we have System.map and depmod is executable
1425 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1426 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1427 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1429 # Create temporary dir for module support files
1430 # clean it up only when building all modules
1431 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1432 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1434 # read all saved command lines
1436 targets := $(wildcard $(sort $(targets)))
1437 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1439 ifneq ($(cmd_files),)
1440 $(cmd_files): ; # Do not try to update included dependency files
1441 include $(cmd_files)
1444 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1446 # $(Q)$(MAKE) $(clean)=dir
1447 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1449 endif # skip-makefile
1454 # Declare the contents of the .PHONY variable as phony. We keep that
1455 # information in a variable so we can use it in if_changed and friends.