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.
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 $(CROSS_COMPILE).
188 # CROSS_COMPILE can be set on the command line
189 # make CROSS_COMPILE=ia64-linux-
190 # Alternatively CROSS_COMPILE can be set in the environment.
191 # A third alternative is to store a setting in .config so that plain
192 # "make" in the configured kernel build directory always uses that.
193 # Default value for CROSS_COMPILE is not to prefix executables
194 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
197 ifneq ($(wildcard ../prebuilts/gcc/linux-x86/arm/arm-eabi-4.6),)
198 CROSS_COMPILE ?= ../prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi-
200 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
202 # Architecture as present in compile.h
203 UTS_MACHINE := $(ARCH)
206 # Additional ARCH settings for x86
210 ifeq ($(ARCH),x86_64)
214 # Additional ARCH settings for sparc
215 ifeq ($(ARCH),sparc32)
218 ifeq ($(ARCH),sparc64)
222 # Additional ARCH settings for sh
227 # Additional ARCH settings for tile
228 ifeq ($(ARCH),tilepro)
231 ifeq ($(ARCH),tilegx)
235 # Where to locate arch specific headers
236 hdr-arch := $(SRCARCH)
238 KCONFIG_CONFIG ?= .config
239 export KCONFIG_CONFIG
241 # SHELL used by kbuild
242 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
243 else if [ -x /bin/bash ]; then echo /bin/bash; \
244 else echo sh; fi ; fi)
248 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
251 # Decide whether to build built-in, modular, or both.
252 # Normally, just do built-in.
257 # If we have only "make modules", don't compile built-in objects.
258 # When we're building modules with modversions, we need to consider
259 # the built-in objects during the descend as well, in order to
260 # make sure the checksums are up to date before we record them.
262 ifeq ($(MAKECMDGOALS),modules)
263 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
266 # If we have "make <whatever> modules", compile modules
267 # in addition to whatever we do anyway.
268 # Just "make" or "make all" shall build modules as well
270 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
274 ifeq ($(MAKECMDGOALS),)
278 export KBUILD_MODULES KBUILD_BUILTIN
279 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
282 # ---------------------------------------------------------------------------
284 # Normally, we echo the whole command before executing it. By making
285 # that echo $($(quiet)$(cmd)), we now have the possibility to set
286 # $(quiet) to choose other forms of output instead, e.g.
288 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
289 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
291 # If $(quiet) is empty, the whole command will be printed.
292 # If it is set to "quiet_", only the short version will be printed.
293 # If it is set to "silent_", nothing will be printed at all, since
294 # the variable $(silent_cmd_cc_o_c) doesn't exist.
296 # A simple variant is to prefix commands with $(Q) - that's useful
297 # for commands that shall be hidden in non-verbose mode.
301 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
302 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
304 ifeq ($(KBUILD_VERBOSE),1)
312 # If the user is running make -s (silent mode), suppress echoing of
315 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
319 export quiet Q KBUILD_VERBOSE
322 # Look for make include files relative to root of kernel src
323 MAKEFLAGS += --include-dir=$(srctree)
325 # We need some generic definitions (do not try to remake the file).
326 $(srctree)/scripts/Kbuild.include: ;
327 include $(srctree)/scripts/Kbuild.include
329 # Make variables (CC, etc...)
331 AS = $(CROSS_COMPILE)as
332 LD = $(CROSS_COMPILE)ld
333 CC = $(CROSS_COMPILE)gcc
335 AR = $(CROSS_COMPILE)ar
336 NM = $(CROSS_COMPILE)nm
337 STRIP = $(CROSS_COMPILE)strip
338 OBJCOPY = $(CROSS_COMPILE)objcopy
339 OBJDUMP = $(CROSS_COMPILE)objdump
341 GENKSYMS = scripts/genksyms/genksyms
342 INSTALLKERNEL := installkernel
343 DEPMOD = /sbin/depmod
347 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
348 -Wbitwise -Wno-return-void $(CF)
354 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
357 # Use USERINCLUDE when you must reference the UAPI directories only.
359 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
360 -Iarch/$(hdr-arch)/include/generated/uapi \
361 -I$(srctree)/include/uapi \
362 -Iinclude/generated/uapi \
363 -include $(srctree)/include/linux/kconfig.h
365 # Use LINUXINCLUDE when you must reference the include/ directory.
366 # Needed to be compatible with the O= option
368 -I$(srctree)/arch/$(hdr-arch)/include \
369 -Iarch/$(hdr-arch)/include/generated \
370 $(if $(KBUILD_SRC), -I$(srctree)/include) \
374 KBUILD_CPPFLAGS := -D__KERNEL__
376 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
377 -fno-strict-aliasing -fno-common \
378 -Werror-implicit-function-declaration \
379 -Wno-format-security \
380 -fno-delete-null-pointer-checks
381 KBUILD_AFLAGS_KERNEL :=
382 KBUILD_CFLAGS_KERNEL :=
383 KBUILD_AFLAGS := -D__ASSEMBLY__
384 KBUILD_AFLAGS_MODULE := -DMODULE
385 KBUILD_CFLAGS_MODULE := -DMODULE
386 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
388 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
389 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
390 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
392 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
393 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
394 export CPP AR NM STRIP OBJCOPY OBJDUMP
395 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
396 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
398 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
399 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
400 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
401 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
402 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
403 export KBUILD_ARFLAGS OBJCOPY_OUTPUT_FORMAT
405 # When compiling out-of-tree modules, put MODVERDIR in the module
406 # tree rather than in the kernel tree. The kernel tree might
408 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
410 # Files to ignore in find ... statements
412 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
413 -o -name .pc -o -name .hg -o -name .git \) -prune -o
414 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
415 --exclude CVS --exclude .pc --exclude .hg --exclude .git
417 # ===========================================================================
418 # Rules shared between *config targets and build targets
420 # Basic helpers built in scripts/
421 PHONY += scripts_basic
423 $(Q)$(MAKE) $(build)=scripts/basic
424 $(Q)rm -f .tmp_quiet_recordmcount
426 # To avoid any implicit rule to kick in, define an empty command.
427 scripts/basic/%: scripts_basic ;
429 PHONY += outputmakefile
430 # outputmakefile generates a Makefile in the output directory, if using a
431 # separate output directory. This allows convenient use of make in the
434 ifneq ($(KBUILD_SRC),)
435 $(Q)ln -fsn $(srctree) source
436 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
437 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
440 # Support for using generic headers in asm-generic
443 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
444 src=asm obj=arch/$(SRCARCH)/include/generated/asm
445 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
446 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
448 # To make sure we do not include .config for any of the *config targets
449 # catch them early, and hand them over to scripts/kconfig/Makefile
450 # It is allowed to specify more targets when calling make, including
451 # mixing *config targets and build targets.
452 # For example 'make oldconfig all'.
453 # Detect when mixed targets is specified, and make a second invocation
454 # of make so .config is not included in this case either (for *config).
456 version_h := include/generated/uapi/linux/version.h
458 no-dot-config-targets := clean mrproper distclean \
459 cscope gtags TAGS tags help %docs check% coccicheck \
460 $(version_h) headers_% archheaders archscripts \
461 kernelversion %src-pkg
467 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
468 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
473 ifeq ($(KBUILD_EXTMOD),)
474 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
476 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
482 ifeq ($(mixed-targets),1)
483 # ===========================================================================
484 # We're called with mixed targets (*config and build targets).
485 # Handle them one by one.
488 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
491 ifeq ($(config-targets),1)
492 # ===========================================================================
493 # *config targets only - make sure prerequisites are updated, and descend
494 # in scripts/kconfig to make the *config target
496 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
497 # KBUILD_DEFCONFIG may point out an alternative default configuration
498 # used for 'make defconfig'
499 include $(srctree)/arch/$(SRCARCH)/Makefile
500 export KBUILD_DEFCONFIG KBUILD_KCONFIG
502 config: scripts_basic outputmakefile FORCE
503 $(Q)mkdir -p include/linux include/config
504 $(Q)$(MAKE) $(build)=scripts/kconfig $@
506 %config: scripts_basic outputmakefile FORCE
507 $(Q)mkdir -p include/linux include/config
508 $(Q)$(MAKE) $(build)=scripts/kconfig $@
511 # ===========================================================================
512 # Build targets only - this includes vmlinux, arch specific targets, clean
513 # targets and others. In general all targets except *config targets.
515 ifeq ($(KBUILD_EXTMOD),)
516 # Additional helpers built in scripts/
517 # Carefully list dependencies so we do not try to build scripts twice
520 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
522 $(Q)$(MAKE) $(build)=$(@)
524 # Objects we will link into vmlinux / subdirs we need to visit
526 drivers-y := drivers/ sound/ firmware/
530 endif # KBUILD_EXTMOD
532 ifeq ($(dot-config),1)
534 -include include/config/auto.conf
536 ifeq ($(KBUILD_EXTMOD),)
537 # Read in dependencies to all Kconfig* files, make sure to run
538 # oldconfig if changes are detected.
539 -include include/config/auto.conf.cmd
541 # To avoid any implicit rule to kick in, define an empty command
542 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
544 # If .config is newer than include/config/auto.conf, someone tinkered
545 # with it and forgot to run make oldconfig.
546 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
547 # we execute the config step to be sure to catch updated Kconfig files
548 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
549 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
551 # external modules needs include/generated/autoconf.h and include/config/auto.conf
552 # but do not care if they are up-to-date. Use auto.conf to trigger the test
553 PHONY += include/config/auto.conf
555 include/config/auto.conf:
556 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
558 echo >&2 " ERROR: Kernel configuration is invalid."; \
559 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
560 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
564 endif # KBUILD_EXTMOD
567 # Dummy target needed, because used as prerequisite
568 include/config/auto.conf: ;
569 endif # $(dot-config)
571 # The all: target is the default when no target is given on the
573 # This allow a user to issue only 'make' to build a kernel including modules
574 # Defaults to vmlinux, but the arch makefile usually adds further targets
577 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
578 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
583 include $(srctree)/arch/$(SRCARCH)/Makefile
585 ifdef CONFIG_READABLE_ASM
586 # Disable optimizations that make assembler listings hard to read.
587 # reorder blocks reorders the control in the function
588 # ipa clone creates specialized cloned functions
589 # partial inlining inlines only parts of functions
590 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
591 $(call cc-option,-fno-ipa-cp-clone,) \
592 $(call cc-option,-fno-partial-inlining)
595 ifneq ($(CONFIG_FRAME_WARN),0)
596 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
599 # Force gcc to behave correct even for buggy distributions
600 ifndef CONFIG_CC_STACKPROTECTOR
601 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
604 # This warning generated too much noise in a regular build.
605 # Use make W=1 to enable this warning (see scripts/Makefile.build)
606 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
608 ifdef CONFIG_FRAME_POINTER
609 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
611 # Some targets (ARM with Thumb2, for example), can't be built with frame
612 # pointers. For those, we don't have FUNCTION_TRACER automatically
613 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
614 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
615 # -fomit-frame-pointer with FUNCTION_TRACER.
616 ifndef CONFIG_FUNCTION_TRACER
617 KBUILD_CFLAGS += -fomit-frame-pointer
621 ifdef CONFIG_DEBUG_INFO
623 KBUILD_AFLAGS += -gdwarf-2
626 ifdef CONFIG_DEBUG_INFO_REDUCED
627 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
628 $(call cc-option,-fno-var-tracking)
631 ifdef CONFIG_FUNCTION_TRACER
632 ifdef CONFIG_HAVE_FENTRY
633 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
635 KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
636 KBUILD_AFLAGS += $(CC_USING_FENTRY)
637 ifdef CONFIG_DYNAMIC_FTRACE
638 ifdef CONFIG_HAVE_C_RECORDMCOUNT
639 BUILD_C_RECORDMCOUNT := y
640 export BUILD_C_RECORDMCOUNT
645 # We trigger additional mismatches with less inlining
646 ifdef CONFIG_DEBUG_SECTION_MISMATCH
647 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
650 # arch Makefile may override CC so keep this after arch Makefile is included
651 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
652 CHECKFLAGS += $(NOSTDINC_FLAGS)
654 # warn about C99 declaration after statement
655 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
657 # disable pointer signed / unsigned warnings in gcc 4.0
658 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
660 # disable invalid "can't wrap" optimizations for signed / pointers
661 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
663 # conserve stack if available
664 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
666 # use the deterministic mode of AR if available
667 KBUILD_ARFLAGS := $(call ar-option,D)
669 # check for 'asm goto'
670 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
671 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
674 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
675 KBUILD_CPPFLAGS += $(KCPPFLAGS)
676 KBUILD_AFLAGS += $(KAFLAGS)
677 KBUILD_CFLAGS += $(KCFLAGS)
679 # Use --build-id when available.
680 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
681 $(call cc-ldoption, -Wl$(comma)--build-id,))
682 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
683 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
685 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
686 LDFLAGS_vmlinux += $(call ld-option, -X,)
689 ifeq ($(CONFIG_PIE),y)
690 LDFLAGS_vmlinux += --just-symbols=pie/pie.syms
693 # Default kernel image to build when no specific target is given.
694 # KBUILD_IMAGE may be overruled on the command line or
695 # set in the environment
696 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
698 export KBUILD_IMAGE ?= vmlinux
701 # INSTALL_PATH specifies where to place the updated kernel and system map
702 # images. Default is /boot, but you can set it to other values
703 export INSTALL_PATH ?= /boot
706 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
707 # relocations required by build roots. This is not defined in the
708 # makefile but the argument can be passed to make if needed.
711 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
715 # INSTALL_MOD_STRIP, if defined, will cause modules to be
716 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
717 # the default option --strip-debug will be used. Otherwise,
718 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
720 ifdef INSTALL_MOD_STRIP
721 ifeq ($(INSTALL_MOD_STRIP),1)
722 mod_strip_cmd = $(STRIP) --strip-debug
724 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
725 endif # INSTALL_MOD_STRIP=1
728 endif # INSTALL_MOD_STRIP
732 ifdef CONFIG_MODULE_SIG_ALL
733 MODSECKEY = ./signing_key.priv
734 MODPUBKEY = ./signing_key.x509
736 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
743 ifeq ($(KBUILD_EXTMOD),)
744 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
746 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
747 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
748 $(net-y) $(net-m) $(libs-y) $(libs-m) $(libpie-y)))
750 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
752 $(core-n) $(core-) $(drivers-n) $(drivers-) \
753 $(net-n) $(net-) $(libs-n) $(libs-))))
755 pie-$(CONFIG_PIE) := pie/
757 init-y := $(patsubst %/, %/built-in.o, $(init-y))
758 core-y := $(patsubst %/, %/built-in.o, $(core-y))
759 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
760 net-y := $(patsubst %/, %/built-in.o, $(net-y))
761 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
762 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
763 libs-y := $(libs-y1) $(libs-y2)
764 pie-y := $(patsubst %/, %/built-in.o, $(pie-y))
765 libpie-y := $(patsubst %/, %/built-in.o, $(libpie-y))
767 # Externally visible symbols (used by link-vmlinux.sh)
768 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
769 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
770 export KBUILD_VMLINUX_PIE := $(pie-y)
771 export KBUILD_LIBPIE := $(libpie-y)
772 export KBUILD_PIE_LDS := $(PIE_LDS)
773 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
774 export LDFLAGS_vmlinux
775 # used by scripts/pacmage/Makefile
776 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
778 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_PIE_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_PIE)
780 # Final link of vmlinux
781 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
782 quiet_cmd_link-vmlinux = LINK $@
784 # Include targets which we want to
785 # execute if the rest of the kernel build went well.
786 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
787 ifdef CONFIG_HEADERS_CHECK
788 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
791 $(Q)$(MAKE) $(build)=samples
793 ifdef CONFIG_BUILD_DOCSRC
794 $(Q)$(MAKE) $(build)=Documentation
796 +$(call if_changed,link-vmlinux)
798 # The actual objects are generated when descending,
799 # make sure no implicit rule kicks in
800 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
802 # Handle descending into subdirectories listed in $(vmlinux-dirs)
803 # Preset locale variables to speed up the build process. Limit locale
804 # tweaks to this spot to avoid wrong language settings when running
805 # make menuconfig etc.
806 # Error messages still appears in the original language
808 PHONY += $(vmlinux-dirs)
809 $(vmlinux-dirs): prepare scripts
810 $(Q)$(MAKE) $(build)=$@
812 # Store (new) KERNELRELASE string in include/config/kernel.release
813 include/config/kernel.release: include/config/auto.conf FORCE
815 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
818 # Things we need to do before we recursively start building the kernel
819 # or the modules are listed in "prepare".
820 # A multi level approach is used. prepareN is processed before prepareN-1.
821 # archprepare is used in arch Makefiles and when processed asm symlink,
822 # version.h and scripts_basic is processed / created.
824 # Listed in dependency order
825 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
827 # prepare3 is used to check if we are building in a separate output directory,
829 # 1) Check that make has not been executed in the kernel src $(srctree)
830 prepare3: include/config/kernel.release
831 ifneq ($(KBUILD_SRC),)
832 @$(kecho) ' Using $(srctree) as source for kernel'
833 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
834 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
835 echo >&2 " in the '$(srctree)' directory.";\
840 # prepare2 creates a makefile if using a separate output directory
841 prepare2: prepare3 outputmakefile asm-generic
843 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
844 include/config/auto.conf
847 archprepare: archheaders archscripts prepare1 scripts_basic
849 prepare0: archprepare FORCE
850 $(Q)$(MAKE) $(build)=.
852 # All the preparing..
855 # Generate some files
856 # ---------------------------------------------------------------------------
858 # KERNELRELEASE can change from a few different places, meaning version.h
859 # needs to be updated, so this check is forced on all builds
862 define filechk_utsrelease.h
863 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
864 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
867 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
870 define filechk_version.h
871 (echo \#define LINUX_VERSION_CODE $(shell \
872 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
873 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
876 $(version_h): $(srctree)/Makefile FORCE
877 $(call filechk,version.h)
879 include/generated/utsrelease.h: include/config/kernel.release FORCE
880 $(call filechk,utsrelease.h)
884 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
885 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
887 # ---------------------------------------------------------------------------
891 @echo '*** Warning: make $@ is unnecessary now.'
893 # ---------------------------------------------------------------------------
895 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
896 export INSTALL_FW_PATH
898 PHONY += firmware_install
899 firmware_install: FORCE
900 @mkdir -p $(objtree)/firmware
901 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
903 # ---------------------------------------------------------------------------
906 #Default location for installed headers
907 export INSTALL_HDR_PATH = $(objtree)/usr
909 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
911 # If we do an all arch process set dst to asm-$(hdr-arch)
912 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
921 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
922 $(Q)$(MAKE) $(build)=scripts build_unifdef
924 PHONY += headers_install_all
926 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
928 PHONY += headers_install
929 headers_install: __headers
930 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
931 $(error Headers not exportable for the $(SRCARCH) architecture))
932 $(Q)$(MAKE) $(hdr-inst)=include/uapi
933 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
935 PHONY += headers_check_all
936 headers_check_all: headers_install_all
937 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
939 PHONY += headers_check
940 headers_check: headers_install
941 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
942 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
944 # ---------------------------------------------------------------------------
949 # By default, build modules as well
955 # A module can be listed more than once in obj-m resulting in
956 # duplicate lines in modules.order files. Those are removed
957 # using awk while concatenating to the final file.
960 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
961 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
962 @$(kecho) ' Building modules, stage 2.';
963 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
964 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
966 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
967 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
969 %/modules.builtin: include/config/auto.conf
970 $(Q)$(MAKE) $(modbuiltin)=$*
973 # Target to prepare building external modules
974 PHONY += modules_prepare
975 modules_prepare: prepare scripts
977 # Target to install modules
978 PHONY += modules_install
979 modules_install: _modinst_ _modinst_post
983 @rm -rf $(MODLIB)/kernel
984 @rm -f $(MODLIB)/source
985 @mkdir -p $(MODLIB)/kernel
986 @ln -s $(srctree) $(MODLIB)/source
987 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
988 rm -f $(MODLIB)/build ; \
989 ln -s $(objtree) $(MODLIB)/build ; \
991 @cp -f $(objtree)/modules.order $(MODLIB)/
992 @cp -f $(objtree)/modules.builtin $(MODLIB)/
993 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
995 # This depmod is only for convenience to give the initial
996 # boot a modules.dep even before / is mounted read-write. However the
997 # boot script depmod is the master version.
998 PHONY += _modinst_post
999 _modinst_post: _modinst_
1000 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1003 ifeq ($(CONFIG_MODULE_SIG), y)
1004 PHONY += modules_sign
1006 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1009 else # CONFIG_MODULES
1011 # Modules not configured
1012 # ---------------------------------------------------------------------------
1014 modules modules_install: FORCE
1016 @echo >&2 "The present kernel configuration has modules disabled."
1017 @echo >&2 "Type 'make config' and enable loadable module support."
1018 @echo >&2 "Then build a kernel with module support enabled."
1022 endif # CONFIG_MODULES
1025 # Cleaning is done on three levels.
1026 # make clean Delete most generated files
1027 # Leave enough to build external modules
1028 # make mrproper Delete the current configuration, and all generated files
1029 # make distclean Remove editor backup files, patch leftover files and the like
1031 # Directories & files removed with 'make clean'
1032 CLEAN_DIRS += $(MODVERDIR)
1034 # Directories & files removed with 'make mrproper'
1035 MRPROPER_DIRS += include/config usr/include include/generated \
1036 arch/*/include/generated
1037 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1038 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1039 signing_key.priv signing_key.x509 x509.genkey \
1040 extra_certificates signing_key.x509.keyid \
1041 signing_key.x509.signer
1043 # clean - Delete most, but leave enough to build external modules
1045 clean: rm-dirs := $(CLEAN_DIRS)
1046 clean: rm-files := $(CLEAN_FILES)
1047 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1049 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1051 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1054 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1056 clean: archclean vmlinuxclean
1058 # mrproper - Delete all generated files, including .config
1060 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1061 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1062 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1064 PHONY += $(mrproper-dirs) mrproper archmrproper
1066 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1068 mrproper: clean archmrproper $(mrproper-dirs)
1077 @find $(srctree) $(RCS_FIND_IGNORE) \
1078 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1079 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1081 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1082 -type f -print | xargs rm -f
1085 # Packaging of the kernel to various formats
1086 # ---------------------------------------------------------------------------
1087 # rpm target kept for backward compatibility
1088 package-dir := $(srctree)/scripts/package
1091 $(Q)$(MAKE) $(build)=$(package-dir) $@
1092 %pkg: include/config/kernel.release FORCE
1093 $(Q)$(MAKE) $(build)=$(package-dir) $@
1094 rpm: include/config/kernel.release FORCE
1095 $(Q)$(MAKE) $(build)=$(package-dir) $@
1098 # Brief documentation of the typical targets used
1099 # ---------------------------------------------------------------------------
1101 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1102 boards := $(notdir $(boards))
1103 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1104 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1107 @echo 'Cleaning targets:'
1108 @echo ' clean - Remove most generated files but keep the config and'
1109 @echo ' enough build support to build external modules'
1110 @echo ' mrproper - Remove all generated files + config + various backup files'
1111 @echo ' distclean - mrproper + remove editor backup and patch files'
1113 @echo 'Configuration targets:'
1114 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1116 @echo 'Other generic targets:'
1117 @echo ' all - Build all targets marked with [*]'
1118 @echo '* vmlinux - Build the bare kernel'
1119 @echo '* modules - Build all modules'
1120 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1121 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1122 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1123 @echo ' dir/ - Build all files in dir and below'
1124 @echo ' dir/file.[oisS] - Build specified target only'
1125 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1126 @echo ' (requires a recent binutils and recent build (System.map))'
1127 @echo ' dir/file.ko - Build module including final link'
1128 @echo ' modules_prepare - Set up for building external modules'
1129 @echo ' tags/TAGS - Generate tags file for editors'
1130 @echo ' cscope - Generate cscope index'
1131 @echo ' gtags - Generate GNU GLOBAL index'
1132 @echo ' kernelrelease - Output the release version string'
1133 @echo ' kernelversion - Output the version stored in Makefile'
1134 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1135 echo ' (default: $(INSTALL_HDR_PATH))'; \
1137 @echo 'Static analysers'
1138 @echo ' checkstack - Generate a list of stack hogs'
1139 @echo ' namespacecheck - Name space analysis on compiled kernel'
1140 @echo ' versioncheck - Sanity check on version.h usage'
1141 @echo ' includecheck - Check for duplicate included header files'
1142 @echo ' export_report - List the usages of all exported symbols'
1143 @echo ' headers_check - Sanity check on exported headers'
1144 @echo ' headerdep - Detect inclusion cycles in headers'
1145 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1147 @echo 'Kernel packaging:'
1148 @$(MAKE) $(build)=$(package-dir) help
1150 @echo 'Documentation targets:'
1151 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1153 @echo 'Architecture specific targets ($(SRCARCH)):'
1154 @$(if $(archhelp),$(archhelp),\
1155 echo ' No architecture specific help defined for $(SRCARCH)')
1158 $(foreach b, $(boards), \
1159 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1161 @$(if $(board-dirs), \
1162 $(foreach b, $(board-dirs), \
1163 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1164 printf " %-16s - Show all of the above\\n" help-boards; \
1167 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1168 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1169 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1170 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1171 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1172 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1173 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1174 @echo ' 1: warnings which may be relevant and do not occur too often'
1175 @echo ' 2: warnings which occur quite often but may still be relevant'
1176 @echo ' 3: more obscure warnings, can most likely be ignored'
1177 @echo ' Multiple levels can be combined with W=12 or W=123'
1179 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1180 @echo 'For further info see the ./README file'
1183 help-board-dirs := $(addprefix help-,$(board-dirs))
1185 help-boards: $(help-board-dirs)
1187 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1189 $(help-board-dirs): help-%:
1190 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1191 @$(if $(boards-per-dir), \
1192 $(foreach b, $(boards-per-dir), \
1193 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1197 # Documentation targets
1198 # ---------------------------------------------------------------------------
1199 %docs: scripts_basic FORCE
1200 $(Q)$(MAKE) $(build)=scripts build_docproc
1201 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1203 else # KBUILD_EXTMOD
1206 # External module support.
1207 # When building external modules the kernel used as basis is considered
1208 # read-only, and no consistency checks are made and the make
1209 # system is not used on the basis kernel. If updates are required
1210 # in the basis kernel ordinary make commands (without M=...) must
1213 # The following are the only valid targets when building external
1215 # make M=dir clean Delete all automatically generated files
1216 # make M=dir modules Make all modules in specified dir
1217 # make M=dir Same as 'make M=dir modules'
1218 # make M=dir modules_install
1219 # Install the modules built in the module directory
1220 # Assumes install directory is already created
1222 # We are always building modules
1224 PHONY += crmodverdir
1228 PHONY += $(objtree)/Module.symvers
1229 $(objtree)/Module.symvers:
1230 @test -e $(objtree)/Module.symvers || ( \
1232 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1233 echo " is missing; modules will have no dependencies and modversions."; \
1236 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1237 PHONY += $(module-dirs) modules
1238 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1239 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1241 modules: $(module-dirs)
1242 @$(kecho) ' Building modules, stage 2.';
1243 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1245 PHONY += modules_install
1246 modules_install: _emodinst_ _emodinst_post
1248 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1251 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1252 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1254 PHONY += _emodinst_post
1255 _emodinst_post: _emodinst_
1258 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1260 PHONY += $(clean-dirs) clean
1262 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1264 clean: rm-dirs := $(MODVERDIR)
1265 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1268 @echo ' Building external modules.'
1269 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1271 @echo ' modules - default target, build the module(s)'
1272 @echo ' modules_install - install the module'
1273 @echo ' clean - remove generated files in module directory only'
1277 PHONY += prepare scripts
1280 endif # KBUILD_EXTMOD
1282 clean: $(clean-dirs)
1285 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1286 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1288 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1289 -o -name '*.symtypes' -o -name 'modules.order' \
1290 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1291 -o -name '*.gcno' \) -type f -print | xargs rm -f
1293 # Generate tags for editors
1294 # ---------------------------------------------------------------------------
1295 quiet_cmd_tags = GEN $@
1296 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1298 tags TAGS cscope gtags: FORCE
1301 # Scripts to check various things for consistency
1302 # ---------------------------------------------------------------------------
1304 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1307 find $(srctree)/* $(RCS_FIND_IGNORE) \
1308 -name '*.[hcS]' -type f -print | sort \
1309 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1312 find $(srctree)/* $(RCS_FIND_IGNORE) \
1313 -name '*.[hcS]' -type f -print | sort \
1314 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1317 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1320 $(PERL) $(srctree)/scripts/namespace.pl
1323 $(PERL) $(srctree)/scripts/export_report.pl
1325 endif #ifeq ($(config-targets),1)
1326 endif #ifeq ($(mixed-targets),1)
1328 PHONY += checkstack kernelrelease kernelversion
1330 # UML needs a little special treatment here. It wants to use the host
1331 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1332 # else wants $(ARCH), including people doing cross-builds, which means
1333 # that $(SUBARCH) doesn't work here.
1335 CHECKSTACK_ARCH := $(SUBARCH)
1337 CHECKSTACK_ARCH := $(ARCH)
1340 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1341 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1344 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1347 @echo $(KERNELVERSION)
1349 # Clear a bunch of variables before executing the submake
1351 $(Q)mkdir -p $(objtree)/tools
1352 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1355 $(Q)mkdir -p $(objtree)/tools
1356 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1359 # ---------------------------------------------------------------------------
1360 # Single targets are compatible with:
1361 # - build with mixed source and output
1362 # - build with separate output dir 'make O=...'
1363 # - external modules
1365 # target-dir => where to store outputfile
1366 # build-dir => directory in kernel source tree to use
1368 ifeq ($(KBUILD_EXTMOD),)
1369 build-dir = $(patsubst %/,%,$(dir $@))
1370 target-dir = $(dir $@)
1372 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1373 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1374 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1377 %.s: %.c prepare scripts FORCE
1378 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1379 %.i: %.c prepare scripts FORCE
1380 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1381 %.o: %.c prepare scripts FORCE
1382 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1383 %.lst: %.c prepare scripts FORCE
1384 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1385 %.s: %.S prepare scripts FORCE
1386 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1387 %.o: %.S prepare scripts FORCE
1388 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1389 %.symtypes: %.c prepare scripts FORCE
1390 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1393 /: prepare scripts FORCE
1395 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1396 $(build)=$(build-dir)
1397 %/: prepare scripts FORCE
1399 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1400 $(build)=$(build-dir)
1401 %.ko: prepare scripts FORCE
1403 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1404 $(build)=$(build-dir) $(@:.ko=.o)
1405 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1407 # FIXME Should go into a make.lib or something
1408 # ===========================================================================
1410 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1411 cmd_rmdirs = rm -rf $(rm-dirs)
1413 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1414 cmd_rmfiles = rm -f $(rm-files)
1416 # Run depmod only if we have System.map and depmod is executable
1417 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1418 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1419 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1421 # Create temporary dir for module support files
1422 # clean it up only when building all modules
1423 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1424 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1426 # read all saved command lines
1428 targets := $(wildcard $(sort $(targets)))
1429 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1431 ifneq ($(cmd_files),)
1432 $(cmd_files): ; # Do not try to update included dependency files
1433 include $(cmd_files)
1436 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1438 # $(Q)$(MAKE) $(clean)=dir
1439 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1441 endif # skip-makefile
1446 # Declare the contents of the .PHONY variable as phony. We keep that
1447 # information in a variable so we can use it in if_changed and friends.